--- /dev/null
+/*
+ *
+ * ETRAX 100LX USB Host Controller Driver
+ *
+ * Copyright (C) 2005 - 2008 Axis Communications AB
+ *
+ * Author: Konrad Eriksson <konrad.eriksson@axis.se>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/moduleparam.h>
+#include <linux/spinlock.h>
+#include <linux/usb.h>
+#include <linux/platform_device.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/arch/dma.h>
+#include <asm/arch/io_interface_mux.h>
+
+#include "../core/hcd.h"
+#include "../core/hub.h"
+#include "hc-crisv10.h"
+#include "hc-cris-dbg.h"
+
+
+/***************************************************************************/
+/***************************************************************************/
+/* Host Controller settings */
+/***************************************************************************/
+/***************************************************************************/
+
+#define VERSION "1.00-openwrt_diff"
+#define COPYRIGHT "(c) 2005, 2006 Axis Communications AB"
+#define DESCRIPTION "ETRAX 100LX USB Host Controller"
+
+#define ETRAX_USB_HC_IRQ USB_HC_IRQ_NBR
+#define ETRAX_USB_RX_IRQ USB_DMA_RX_IRQ_NBR
+#define ETRAX_USB_TX_IRQ USB_DMA_TX_IRQ_NBR
+
+/* Number of physical ports in Etrax 100LX */
+#define USB_ROOT_HUB_PORTS 2
+
+const char hc_name[] = "hc-crisv10";
+const char product_desc[] = DESCRIPTION;
+
+/* The number of epids is, among other things, used for pre-allocating
+ ctrl, bulk and isoc EP descriptors (one for each epid).
+ Assumed to be > 1 when initiating the DMA lists. */
+#define NBR_OF_EPIDS 32
+
+/* Support interrupt traffic intervals up to 128 ms. */
+#define MAX_INTR_INTERVAL 128
+
+/* If periodic traffic (intr or isoc) is to be used, then one entry in the EP
+ table must be "invalid". By this we mean that we shouldn't care about epid
+ attentions for this epid, or at least handle them differently from epid
+ attentions for "valid" epids. This define determines which one to use
+ (don't change it). */
+#define INVALID_EPID 31
+/* A special epid for the bulk dummys. */
+#define DUMMY_EPID 30
+
+/* Module settings */
+
+MODULE_DESCRIPTION(DESCRIPTION);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Konrad Eriksson <konrad.eriksson@axis.se>");
+
+
+/* Module parameters */
+
+/* 0 = No ports enabled
+ 1 = Only port 1 enabled (on board ethernet on devboard)
+ 2 = Only port 2 enabled (external connector on devboard)
+ 3 = Both ports enabled
+*/
+static unsigned int ports = 3;
+module_param(ports, uint, S_IRUGO);
+MODULE_PARM_DESC(ports, "Bitmask indicating USB ports to use");
+
+
+/***************************************************************************/
+/***************************************************************************/
+/* Shared global variables for this module */
+/***************************************************************************/
+/***************************************************************************/
+
+/* EP descriptor lists for non period transfers. Must be 32-bit aligned. */
+static volatile struct USB_EP_Desc TxBulkEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
+
+static volatile struct USB_EP_Desc TxCtrlEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
+
+/* EP descriptor lists for period transfers. Must be 32-bit aligned. */
+static volatile struct USB_EP_Desc TxIntrEPList[MAX_INTR_INTERVAL] __attribute__ ((aligned (4)));
+static volatile struct USB_SB_Desc TxIntrSB_zout __attribute__ ((aligned (4)));
+
+static volatile struct USB_EP_Desc TxIsocEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
+static volatile struct USB_SB_Desc TxIsocSB_zout __attribute__ ((aligned (4)));
+
+static volatile struct USB_SB_Desc TxIsocSBList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
+
+/* After each enabled bulk EP IN we put two disabled EP descriptors with the eol flag set,
+ causing the DMA to stop the DMA channel. The first of these two has the intr flag set, which
+ gives us a dma8_sub0_descr interrupt. When we receive this, we advance the DMA one step in the
+ EP list and then restart the bulk channel, thus forcing a switch between bulk EP descriptors
+ in each frame. */
+static volatile struct USB_EP_Desc TxBulkDummyEPList[NBR_OF_EPIDS][2] __attribute__ ((aligned (4)));
+
+/* List of URB pointers, where each points to the active URB for a epid.
+ For Bulk, Ctrl and Intr this means which URB that currently is added to
+ DMA lists (Isoc URBs are all directly added to DMA lists). As soon as
+ URB has completed is the queue examined and the first URB in queue is
+ removed and moved to the activeUrbList while its state change to STARTED and
+ its transfer(s) gets added to DMA list (exception Isoc where URBs enter
+ state STARTED directly and added transfers added to DMA lists). */
+static struct urb *activeUrbList[NBR_OF_EPIDS];
+
+/* Additional software state info for each epid */
+static struct etrax_epid epid_state[NBR_OF_EPIDS];
+
+/* Timer handles for bulk traffic timer used to avoid DMA bug where DMA stops
+ even if there is new data waiting to be processed */
+static struct timer_list bulk_start_timer = TIMER_INITIALIZER(NULL, 0, 0);
+static struct timer_list bulk_eot_timer = TIMER_INITIALIZER(NULL, 0, 0);
+
+/* We want the start timer to expire before the eot timer, because the former
+ might start traffic, thus making it unnecessary for the latter to time
+ out. */
+#define BULK_START_TIMER_INTERVAL (HZ/50) /* 20 ms */
+#define BULK_EOT_TIMER_INTERVAL (HZ/16) /* 60 ms */
+
+/* Delay before a URB completion happen when it's scheduled to be delayed */
+#define LATER_TIMER_DELAY (HZ/50) /* 20 ms */
+
+/* Simplifying macros for checking software state info of a epid */
+/* ----------------------------------------------------------------------- */
+#define epid_inuse(epid) epid_state[epid].inuse
+#define epid_out_traffic(epid) epid_state[epid].out_traffic
+#define epid_isoc(epid) (epid_state[epid].type == PIPE_ISOCHRONOUS ? 1 : 0)
+#define epid_intr(epid) (epid_state[epid].type == PIPE_INTERRUPT ? 1 : 0)
+
+
+/***************************************************************************/
+/***************************************************************************/
+/* DEBUG FUNCTIONS */
+/***************************************************************************/
+/***************************************************************************/
+/* Note that these functions are always available in their "__" variants,
+ for use in error situations. The "__" missing variants are controlled by
+ the USB_DEBUG_DESC/USB_DEBUG_URB macros. */
+static void __dump_urb(struct urb* purb)
+{
+ struct crisv10_urb_priv *urb_priv = purb->hcpriv;
+ int urb_num = -1;
+ if(urb_priv) {
+ urb_num = urb_priv->urb_num;
+ }
+ printk("\nURB:0x%x[%d]\n", (unsigned int)purb, urb_num);
+ printk("dev :0x%08lx\n", (unsigned long)purb->dev);
+ printk("pipe :0x%08x\n", purb->pipe);
+ printk("status :%d\n", purb->status);
+ printk("transfer_flags :0x%08x\n", purb->transfer_flags);
+ printk("transfer_buffer :0x%08lx\n", (unsigned long)purb->transfer_buffer);
+ printk("transfer_buffer_length:%d\n", purb->transfer_buffer_length);
+ printk("actual_length :%d\n", purb->actual_length);
+ printk("setup_packet :0x%08lx\n", (unsigned long)purb->setup_packet);
+ printk("start_frame :%d\n", purb->start_frame);
+ printk("number_of_packets :%d\n", purb->number_of_packets);
+ printk("interval :%d\n", purb->interval);
+ printk("error_count :%d\n", purb->error_count);
+ printk("context :0x%08lx\n", (unsigned long)purb->context);
+ printk("complete :0x%08lx\n\n", (unsigned long)purb->complete);
+}
+
+static void __dump_in_desc(volatile struct USB_IN_Desc *in)
+{
+ printk("\nUSB_IN_Desc at 0x%08lx\n", (unsigned long)in);
+ printk(" sw_len : 0x%04x (%d)\n", in->sw_len, in->sw_len);
+ printk(" command : 0x%04x\n", in->command);
+ printk(" next : 0x%08lx\n", in->next);
+ printk(" buf : 0x%08lx\n", in->buf);
+ printk(" hw_len : 0x%04x (%d)\n", in->hw_len, in->hw_len);
+ printk(" status : 0x%04x\n\n", in->status);
+}
+
+static void __dump_sb_desc(volatile struct USB_SB_Desc *sb)
+{
+ char tt = (sb->command & 0x30) >> 4;
+ char *tt_string;
+
+ switch (tt) {
+ case 0:
+ tt_string = "zout";
+ break;
+ case 1:
+ tt_string = "in";
+ break;
+ case 2:
+ tt_string = "out";
+ break;
+ case 3:
+ tt_string = "setup";
+ break;
+ default:
+ tt_string = "unknown (weird)";
+ }
+
+ printk(" USB_SB_Desc at 0x%08lx ", (unsigned long)sb);
+ printk(" command:0x%04x (", sb->command);
+ printk("rem:%d ", (sb->command & 0x3f00) >> 8);
+ printk("full:%d ", (sb->command & 0x40) >> 6);
+ printk("tt:%d(%s) ", tt, tt_string);
+ printk("intr:%d ", (sb->command & 0x8) >> 3);
+ printk("eot:%d ", (sb->command & 0x2) >> 1);
+ printk("eol:%d)", sb->command & 0x1);
+ printk(" sw_len:0x%04x(%d)", sb->sw_len, sb->sw_len);
+ printk(" next:0x%08lx", sb->next);
+ printk(" buf:0x%08lx\n", sb->buf);
+}
+
+
+static void __dump_ep_desc(volatile struct USB_EP_Desc *ep)
+{
+ printk("USB_EP_Desc at 0x%08lx ", (unsigned long)ep);
+ printk(" command:0x%04x (", ep->command);
+ printk("ep_id:%d ", (ep->command & 0x1f00) >> 8);
+ printk("enable:%d ", (ep->command & 0x10) >> 4);
+ printk("intr:%d ", (ep->command & 0x8) >> 3);
+ printk("eof:%d ", (ep->command & 0x2) >> 1);
+ printk("eol:%d)", ep->command & 0x1);
+ printk(" hw_len:0x%04x(%d)", ep->hw_len, ep->hw_len);
+ printk(" next:0x%08lx", ep->next);
+ printk(" sub:0x%08lx\n", ep->sub);
+}
+
+static inline void __dump_ep_list(int pipe_type)
+{
+ volatile struct USB_EP_Desc *ep;
+ volatile struct USB_EP_Desc *first_ep;
+ volatile struct USB_SB_Desc *sb;
+
+ switch (pipe_type)
+ {
+ case PIPE_BULK:
+ first_ep = &TxBulkEPList[0];
+ break;
+ case PIPE_CONTROL:
+ first_ep = &TxCtrlEPList[0];
+ break;
+ case PIPE_INTERRUPT:
+ first_ep = &TxIntrEPList[0];
+ break;
+ case PIPE_ISOCHRONOUS:
+ first_ep = &TxIsocEPList[0];
+ break;
+ default:
+ warn("Cannot dump unknown traffic type");
+ return;
+ }
+ ep = first_ep;
+
+ printk("\n\nDumping EP list...\n\n");
+
+ do {
+ __dump_ep_desc(ep);
+ /* Cannot phys_to_virt on 0 as it turns into 80000000, which is != 0. */
+ sb = ep->sub ? phys_to_virt(ep->sub) : 0;
+ while (sb) {
+ __dump_sb_desc(sb);
+ sb = sb->next ? phys_to_virt(sb->next) : 0;
+ }
+ ep = (volatile struct USB_EP_Desc *)(phys_to_virt(ep->next));
+
+ } while (ep != first_ep);
+}
+
+static inline void __dump_ept_data(int epid)
+{
+ unsigned long flags;
+ __u32 r_usb_ept_data;
+
+ if (epid < 0 || epid > 31) {
+ printk("Cannot dump ept data for invalid epid %d\n", epid);
+ return;
+ }
+
+ local_irq_save(flags);
+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
+ nop();
+ r_usb_ept_data = *R_USB_EPT_DATA;
+ local_irq_restore(flags);
+
+ printk(" R_USB_EPT_DATA = 0x%x for epid %d :\n", r_usb_ept_data, epid);
+ if (r_usb_ept_data == 0) {
+ /* No need for more detailed printing. */
+ return;
+ }
+ printk(" valid : %d\n", (r_usb_ept_data & 0x80000000) >> 31);
+ printk(" hold : %d\n", (r_usb_ept_data & 0x40000000) >> 30);
+ printk(" error_count_in : %d\n", (r_usb_ept_data & 0x30000000) >> 28);
+ printk(" t_in : %d\n", (r_usb_ept_data & 0x08000000) >> 27);
+ printk(" low_speed : %d\n", (r_usb_ept_data & 0x04000000) >> 26);
+ printk(" port : %d\n", (r_usb_ept_data & 0x03000000) >> 24);
+ printk(" error_code : %d\n", (r_usb_ept_data & 0x00c00000) >> 22);
+ printk(" t_out : %d\n", (r_usb_ept_data & 0x00200000) >> 21);
+ printk(" error_count_out : %d\n", (r_usb_ept_data & 0x00180000) >> 19);
+ printk(" max_len : %d\n", (r_usb_ept_data & 0x0003f800) >> 11);
+ printk(" ep : %d\n", (r_usb_ept_data & 0x00000780) >> 7);
+ printk(" dev : %d\n", (r_usb_ept_data & 0x0000003f));
+}
+
+static inline void __dump_ept_data_iso(int epid)
+{
+ unsigned long flags;
+ __u32 ept_data;
+
+ if (epid < 0 || epid > 31) {
+ printk("Cannot dump ept data for invalid epid %d\n", epid);
+ return;
+ }
+
+ local_irq_save(flags);
+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
+ nop();
+ ept_data = *R_USB_EPT_DATA_ISO;
+ local_irq_restore(flags);
+
+ printk(" R_USB_EPT_DATA = 0x%x for epid %d :\n", ept_data, epid);
+ if (ept_data == 0) {
+ /* No need for more detailed printing. */
+ return;
+ }
+ printk(" valid : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, valid,
+ ept_data));
+ printk(" port : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, port,
+ ept_data));
+ printk(" error_code : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code,
+ ept_data));
+ printk(" max_len : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, max_len,
+ ept_data));
+ printk(" ep : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, ep,
+ ept_data));
+ printk(" dev : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, dev,
+ ept_data));
+}
+
+static inline void __dump_ept_data_list(void)
+{
+ int i;
+
+ printk("Dumping the whole R_USB_EPT_DATA list\n");
+
+ for (i = 0; i < 32; i++) {
+ __dump_ept_data(i);
+ }
+}
+
+static void debug_epid(int epid) {
+ int i;
+
+ if(epid_isoc(epid)) {
+ __dump_ept_data_iso(epid);
+ } else {
+ __dump_ept_data(epid);
+ }
+
+ printk("Bulk:\n");
+ for(i = 0; i < 32; i++) {
+ if(IO_EXTRACT(USB_EP_command, epid, TxBulkEPList[i].command) ==
+ epid) {
+ printk("%d: ", i); __dump_ep_desc(&(TxBulkEPList[i]));
+ }
+ }
+
+ printk("Ctrl:\n");
+ for(i = 0; i < 32; i++) {
+ if(IO_EXTRACT(USB_EP_command, epid, TxCtrlEPList[i].command) ==
+ epid) {
+ printk("%d: ", i); __dump_ep_desc(&(TxCtrlEPList[i]));
+ }
+ }
+
+ printk("Intr:\n");
+ for(i = 0; i < MAX_INTR_INTERVAL; i++) {
+ if(IO_EXTRACT(USB_EP_command, epid, TxIntrEPList[i].command) ==
+ epid) {
+ printk("%d: ", i); __dump_ep_desc(&(TxIntrEPList[i]));
+ }
+ }
+
+ printk("Isoc:\n");
+ for(i = 0; i < 32; i++) {
+ if(IO_EXTRACT(USB_EP_command, epid, TxIsocEPList[i].command) ==
+ epid) {
+ printk("%d: ", i); __dump_ep_desc(&(TxIsocEPList[i]));
+ }
+ }
+
+ __dump_ept_data_list();
+ __dump_ep_list(PIPE_INTERRUPT);
+ printk("\n\n");
+}
+
+
+
+char* hcd_status_to_str(__u8 bUsbStatus) {
+ static char hcd_status_str[128];
+ hcd_status_str[0] = '\0';
+ if(bUsbStatus & IO_STATE(R_USB_STATUS, ourun, yes)) {
+ strcat(hcd_status_str, "ourun ");
+ }
+ if(bUsbStatus & IO_STATE(R_USB_STATUS, perror, yes)) {
+ strcat(hcd_status_str, "perror ");
+ }
+ if(bUsbStatus & IO_STATE(R_USB_STATUS, device_mode, yes)) {
+ strcat(hcd_status_str, "device_mode ");
+ }
+ if(bUsbStatus & IO_STATE(R_USB_STATUS, host_mode, yes)) {
+ strcat(hcd_status_str, "host_mode ");
+ }
+ if(bUsbStatus & IO_STATE(R_USB_STATUS, started, yes)) {
+ strcat(hcd_status_str, "started ");
+ }
+ if(bUsbStatus & IO_STATE(R_USB_STATUS, running, yes)) {
+ strcat(hcd_status_str, "running ");
+ }
+ return hcd_status_str;
+}
+
+
+char* sblist_to_str(struct USB_SB_Desc* sb_desc) {
+ static char sblist_to_str_buff[128];
+ char tmp[32], tmp2[32];
+ sblist_to_str_buff[0] = '\0';
+ while(sb_desc != NULL) {
+ switch(IO_EXTRACT(USB_SB_command, tt, sb_desc->command)) {
+ case 0: sprintf(tmp, "zout"); break;
+ case 1: sprintf(tmp, "in"); break;
+ case 2: sprintf(tmp, "out"); break;
+ case 3: sprintf(tmp, "setup"); break;
+ }
+ sprintf(tmp2, "(%s %d)", tmp, sb_desc->sw_len);
+ strcat(sblist_to_str_buff, tmp2);
+ if(sb_desc->next != 0) {
+ sb_desc = phys_to_virt(sb_desc->next);
+ } else {
+ sb_desc = NULL;
+ }
+ }
+ return sblist_to_str_buff;
+}
+
+char* port_status_to_str(__u16 wPortStatus) {
+ static char port_status_str[128];
+ port_status_str[0] = '\0';
+ if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes)) {
+ strcat(port_status_str, "connected ");
+ }
+ if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes)) {
+ strcat(port_status_str, "enabled ");
+ }
+ if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, suspended, yes)) {
+ strcat(port_status_str, "suspended ");
+ }
+ if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, reset, yes)) {
+ strcat(port_status_str, "reset ");
+ }
+ if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, speed, full)) {
+ strcat(port_status_str, "full-speed ");
+ } else {
+ strcat(port_status_str, "low-speed ");
+ }
+ return port_status_str;
+}
+
+
+char* endpoint_to_str(struct usb_endpoint_descriptor *ed) {
+ static char endpoint_to_str_buff[128];
+ char tmp[32];
+ int epnum = ed->bEndpointAddress & 0x0F;
+ int dir = ed->bEndpointAddress & 0x80;
+ int type = ed->bmAttributes & 0x03;
+ endpoint_to_str_buff[0] = '\0';
+ sprintf(endpoint_to_str_buff, "ep:%d ", epnum);
+ switch(type) {
+ case 0:
+ sprintf(tmp, " ctrl");
+ break;
+ case 1:
+ sprintf(tmp, " isoc");
+ break;
+ case 2:
+ sprintf(tmp, " bulk");
+ break;
+ case 3:
+ sprintf(tmp, " intr");
+ break;
+ }
+ strcat(endpoint_to_str_buff, tmp);
+ if(dir) {
+ sprintf(tmp, " in");
+ } else {
+ sprintf(tmp, " out");
+ }
+ strcat(endpoint_to_str_buff, tmp);
+
+ return endpoint_to_str_buff;
+}
+
+/* Debug helper functions for Transfer Controller */
+char* pipe_to_str(unsigned int pipe) {
+ static char pipe_to_str_buff[128];
+ char tmp[64];
+ sprintf(pipe_to_str_buff, "dir:%s", str_dir(pipe));
+ sprintf(tmp, " type:%s", str_type(pipe));
+ strcat(pipe_to_str_buff, tmp);
+
+ sprintf(tmp, " dev:%d", usb_pipedevice(pipe));
+ strcat(pipe_to_str_buff, tmp);
+ sprintf(tmp, " ep:%d", usb_pipeendpoint(pipe));
+ strcat(pipe_to_str_buff, tmp);
+ return pipe_to_str_buff;
+}
+
+
+#define USB_DEBUG_DESC 1
+
+#ifdef USB_DEBUG_DESC
+#define dump_in_desc(x) __dump_in_desc(x)
+#define dump_sb_desc(...) __dump_sb_desc(...)
+#define dump_ep_desc(x) __dump_ep_desc(x)
+#define dump_ept_data(x) __dump_ept_data(x)
+#else
+#define dump_in_desc(...) do {} while (0)
+#define dump_sb_desc(...) do {} while (0)
+#define dump_ep_desc(...) do {} while (0)
+#endif
+
+
+/* Uncomment this to enable massive function call trace
+ #define USB_DEBUG_TRACE */
+
+#ifdef USB_DEBUG_TRACE
+#define DBFENTER (printk(": Entering: %s\n", __FUNCTION__))
+#define DBFEXIT (printk(": Exiting: %s\n", __FUNCTION__))
+#else
+#define DBFENTER do {} while (0)
+#define DBFEXIT do {} while (0)
+#endif
+
+#define CHECK_ALIGN(x) if (((__u32)(x)) & 0x00000003) \
+{panic("Alignment check (DWORD) failed at %s:%s:%d\n", __FILE__, __FUNCTION__, __LINE__);}
+
+/* Most helpful debugging aid */
+#define ASSERT(expr) ((void) ((expr) ? 0 : (err("assert failed at: %s %d",__FUNCTION__, __LINE__))))
+
+
+/***************************************************************************/
+/***************************************************************************/
+/* Forward declarations */
+/***************************************************************************/
+/***************************************************************************/
+void crisv10_hcd_epid_attn_irq(struct crisv10_irq_reg *reg);
+void crisv10_hcd_port_status_irq(struct crisv10_irq_reg *reg);
+void crisv10_hcd_ctl_status_irq(struct crisv10_irq_reg *reg);
+void crisv10_hcd_isoc_eof_irq(struct crisv10_irq_reg *reg);
+
+void rh_port_status_change(__u16[]);
+int rh_clear_port_feature(__u8, __u16);
+int rh_set_port_feature(__u8, __u16);
+static void rh_disable_port(unsigned int port);
+
+static void check_finished_bulk_tx_epids(struct usb_hcd *hcd,
+ int timer);
+
+static int tc_setup_epid(struct usb_host_endpoint *ep, struct urb *urb,
+ int mem_flags);
+static void tc_free_epid(struct usb_host_endpoint *ep);
+static int tc_allocate_epid(void);
+static void tc_finish_urb(struct usb_hcd *hcd, struct urb *urb, int status);
+static void tc_finish_urb_later(struct usb_hcd *hcd, struct urb *urb,
+ int status);
+
+static int urb_priv_create(struct usb_hcd *hcd, struct urb *urb, int epid,
+ int mem_flags);
+static void urb_priv_free(struct usb_hcd *hcd, struct urb *urb);
+
+static int crisv10_usb_check_bandwidth(struct usb_device *dev,struct urb *urb);
+static void crisv10_usb_claim_bandwidth(
+ struct usb_device *dev, struct urb *urb, int bustime, int isoc);
+static void crisv10_usb_release_bandwidth(
+ struct usb_hcd *hcd, int isoc, int bandwidth);
+
+static inline struct urb *urb_list_first(int epid);
+static inline void urb_list_add(struct urb *urb, int epid,
+ int mem_flags);
+static inline urb_entry_t *urb_list_entry(struct urb *urb, int epid);
+static inline void urb_list_del(struct urb *urb, int epid);
+static inline void urb_list_move_last(struct urb *urb, int epid);
+static inline struct urb *urb_list_next(struct urb *urb, int epid);
+
+int create_sb_for_urb(struct urb *urb, int mem_flags);
+int init_intr_urb(struct urb *urb, int mem_flags);
+
+static inline void etrax_epid_set(__u8 index, __u32 data);
+static inline void etrax_epid_clear_error(__u8 index);
+static inline void etrax_epid_set_toggle(__u8 index, __u8 dirout,
+ __u8 toggle);
+static inline __u8 etrax_epid_get_toggle(__u8 index, __u8 dirout);
+static inline __u32 etrax_epid_get(__u8 index);
+
+/* We're accessing the same register position in Etrax so
+ when we do full access the internal difference doesn't matter */
+#define etrax_epid_iso_set(index, data) etrax_epid_set(index, data)
+#define etrax_epid_iso_get(index) etrax_epid_get(index)
+
+
+static void tc_dma_process_isoc_urb(struct urb *urb);
+static void tc_dma_process_queue(int epid);
+static void tc_dma_unlink_intr_urb(struct urb *urb);
+static irqreturn_t tc_dma_tx_interrupt(int irq, void *vhc);
+static irqreturn_t tc_dma_rx_interrupt(int irq, void *vhc);
+
+static void tc_bulk_start_timer_func(unsigned long dummy);
+static void tc_bulk_eot_timer_func(unsigned long dummy);
+
+
+/*************************************************************/
+/*************************************************************/
+/* Host Controler Driver block */
+/*************************************************************/
+/*************************************************************/
+
+/* HCD operations */
+static irqreturn_t crisv10_hcd_top_irq(int irq, void*);
+static int crisv10_hcd_reset(struct usb_hcd *);
+static int crisv10_hcd_start(struct usb_hcd *);
+static void crisv10_hcd_stop(struct usb_hcd *);
+#ifdef CONFIG_PM
+static int crisv10_hcd_suspend(struct device *, u32, u32);
+static int crisv10_hcd_resume(struct device *, u32);
+#endif /* CONFIG_PM */
+static int crisv10_hcd_get_frame(struct usb_hcd *);
+
+static int tc_urb_enqueue(struct usb_hcd *, struct urb *, gfp_t mem_flags);
+static int tc_urb_dequeue(struct usb_hcd *, struct urb *, int);
+static void tc_endpoint_disable(struct usb_hcd *, struct usb_host_endpoint *ep);
+
+static int rh_status_data_request(struct usb_hcd *, char *);
+static int rh_control_request(struct usb_hcd *, u16, u16, u16, char*, u16);
+
+#ifdef CONFIG_PM
+static int crisv10_hcd_hub_suspend(struct usb_hcd *);
+static int crisv10_hcd_hub_resume(struct usb_hcd *);
+#endif /* CONFIG_PM */
+#ifdef CONFIG_USB_OTG
+static int crisv10_hcd_start_port_reset(struct usb_hcd *, unsigned);
+#endif /* CONFIG_USB_OTG */
+
+/* host controller driver interface */
+static const struct hc_driver crisv10_hc_driver =
+ {
+ .description = hc_name,
+ .product_desc = product_desc,
+ .hcd_priv_size = sizeof(struct crisv10_hcd),
+
+ /* Attaching IRQ handler manualy in probe() */
+ /* .irq = crisv10_hcd_irq, */
+
+ .flags = HCD_USB11,
+
+ /* called to init HCD and root hub */
+ .reset = crisv10_hcd_reset,
+ .start = crisv10_hcd_start,
+
+ /* cleanly make HCD stop writing memory and doing I/O */
+ .stop = crisv10_hcd_stop,
+
+ /* return current frame number */
+ .get_frame_number = crisv10_hcd_get_frame,
+
+
+ /* Manage i/o requests via the Transfer Controller */
+ .urb_enqueue = tc_urb_enqueue,
+ .urb_dequeue = tc_urb_dequeue,
+
+ /* hw synch, freeing endpoint resources that urb_dequeue can't */
+ .endpoint_disable = tc_endpoint_disable,
+
+
+ /* Root Hub support */
+ .hub_status_data = rh_status_data_request,
+ .hub_control = rh_control_request,
+#ifdef CONFIG_PM
+ .hub_suspend = rh_suspend_request,
+ .hub_resume = rh_resume_request,
+#endif /* CONFIG_PM */
+#ifdef CONFIG_USB_OTG
+ .start_port_reset = crisv10_hcd_start_port_reset,
+#endif /* CONFIG_USB_OTG */
+ };
+
+
+/*
+ * conversion between pointers to a hcd and the corresponding
+ * crisv10_hcd
+ */
+
+static inline struct crisv10_hcd *hcd_to_crisv10_hcd(struct usb_hcd *hcd)
+{
+ return (struct crisv10_hcd *) hcd->hcd_priv;
+}
+
+static inline struct usb_hcd *crisv10_hcd_to_hcd(struct crisv10_hcd *hcd)
+{
+ return container_of((void *) hcd, struct usb_hcd, hcd_priv);
+}
+
+/* check if specified port is in use */
+static inline int port_in_use(unsigned int port)
+{
+ return ports & (1 << port);
+}
+
+/* number of ports in use */
+static inline unsigned int num_ports(void)
+{
+ unsigned int i, num = 0;
+ for (i = 0; i < USB_ROOT_HUB_PORTS; i++)
+ if (port_in_use(i))
+ num++;
+ return num;
+}
+
+/* map hub port number to the port number used internally by the HC */
+static inline unsigned int map_port(unsigned int port)
+{
+ unsigned int i, num = 0;
+ for (i = 0; i < USB_ROOT_HUB_PORTS; i++)
+ if (port_in_use(i))
+ if (++num == port)
+ return i;
+ return -1;
+}
+
+/* size of descriptors in slab cache */
+#ifndef MAX
+#define MAX(x, y) ((x) > (y) ? (x) : (y))
+#endif
+
+
+/******************************************************************/
+/* Hardware Interrupt functions */
+/******************************************************************/
+
+/* Fast interrupt handler for HC */
+static irqreturn_t crisv10_hcd_top_irq(int irq, void *vcd)
+{
+ struct usb_hcd *hcd = vcd;
+ struct crisv10_irq_reg reg;
+ __u32 irq_mask;
+ unsigned long flags;
+
+ DBFENTER;
+
+ ASSERT(hcd != NULL);
+ reg.hcd = hcd;
+
+ /* Turn of other interrupts while handling these sensitive cases */
+ local_irq_save(flags);
+
+ /* Read out which interrupts that are flaged */
+ irq_mask = *R_USB_IRQ_MASK_READ;
+ reg.r_usb_irq_mask_read = irq_mask;
+
+ /* Reading R_USB_STATUS clears the ctl_status interrupt. Note that
+ R_USB_STATUS must be read before R_USB_EPID_ATTN since reading the latter
+ clears the ourun and perror fields of R_USB_STATUS. */
+ reg.r_usb_status = *R_USB_STATUS;
+
+ /* Reading R_USB_EPID_ATTN clears the iso_eof, bulk_eot and epid_attn
+ interrupts. */
+ reg.r_usb_epid_attn = *R_USB_EPID_ATTN;
+
+ /* Reading R_USB_RH_PORT_STATUS_1 and R_USB_RH_PORT_STATUS_2 clears the
+ port_status interrupt. */
+ reg.r_usb_rh_port_status_1 = *R_USB_RH_PORT_STATUS_1;
+ reg.r_usb_rh_port_status_2 = *R_USB_RH_PORT_STATUS_2;
+
+ /* Reading R_USB_FM_NUMBER clears the sof interrupt. */
+ /* Note: the lower 11 bits contain the actual frame number, sent with each
+ sof. */
+ reg.r_usb_fm_number = *R_USB_FM_NUMBER;
+
+ /* Interrupts are handled in order of priority. */
+ if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, port_status)) {
+ crisv10_hcd_port_status_irq(®);
+ }
+ if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, epid_attn)) {
+ crisv10_hcd_epid_attn_irq(®);
+ }
+ if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, ctl_status)) {
+ crisv10_hcd_ctl_status_irq(®);
+ }
+ if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, iso_eof)) {
+ crisv10_hcd_isoc_eof_irq(®);
+ }
+ if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, bulk_eot)) {
+ /* Update/restart the bulk start timer since obviously the channel is
+ running. */
+ mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL);
+ /* Update/restart the bulk eot timer since we just received an bulk eot
+ interrupt. */
+ mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
+
+ /* Check for finished bulk transfers on epids */
+ check_finished_bulk_tx_epids(hcd, 0);
+ }
+ local_irq_restore(flags);
+
+ DBFEXIT;
+ return IRQ_HANDLED;
+}
+
+
+void crisv10_hcd_epid_attn_irq(struct crisv10_irq_reg *reg) {
+ struct usb_hcd *hcd = reg->hcd;
+ struct crisv10_urb_priv *urb_priv;
+ int epid;
+ DBFENTER;
+
+ for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+ if (test_bit(epid, (void *)®->r_usb_epid_attn)) {
+ struct urb *urb;
+ __u32 ept_data;
+ int error_code;
+
+ if (epid == DUMMY_EPID || epid == INVALID_EPID) {
+ /* We definitely don't care about these ones. Besides, they are
+ always disabled, so any possible disabling caused by the
+ epid attention interrupt is irrelevant. */
+ warn("Got epid_attn for INVALID_EPID or DUMMY_EPID (%d).", epid);
+ continue;
+ }
+
+ if(!epid_inuse(epid)) {
+ irq_err("Epid attention on epid:%d that isn't in use\n", epid);
+ printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+ debug_epid(epid);
+ continue;
+ }
+
+ /* Note that although there are separate R_USB_EPT_DATA and
+ R_USB_EPT_DATA_ISO registers, they are located at the same address and
+ are of the same size. In other words, this read should be ok for isoc
+ also. */
+ ept_data = etrax_epid_get(epid);
+ error_code = IO_EXTRACT(R_USB_EPT_DATA, error_code, ept_data);
+
+ /* Get the active URB for this epid. We blatantly assume
+ that only this URB could have caused the epid attention. */
+ urb = activeUrbList[epid];
+ if (urb == NULL) {
+ irq_err("Attention on epid:%d error:%d with no active URB.\n",
+ epid, error_code);
+ printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+ debug_epid(epid);
+ continue;
+ }
+
+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+ ASSERT(urb_priv);
+
+ /* Using IO_STATE_VALUE on R_USB_EPT_DATA should be ok for isoc also. */
+ if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
+
+ /* Isoc traffic doesn't have error_count_in/error_count_out. */
+ if ((usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) &&
+ (IO_EXTRACT(R_USB_EPT_DATA, error_count_in, ept_data) == 3 ||
+ IO_EXTRACT(R_USB_EPT_DATA, error_count_out, ept_data) == 3)) {
+ /* Check if URB allready is marked for late-finish, we can get
+ several 3rd error for Intr traffic when a device is unplugged */
+ if(urb_priv->later_data == NULL) {
+ /* 3rd error. */
+ irq_warn("3rd error for epid:%d (%s %s) URB:0x%x[%d]\n", epid,
+ str_dir(urb->pipe), str_type(urb->pipe),
+ (unsigned int)urb, urb_priv->urb_num);
+
+ tc_finish_urb_later(hcd, urb, -EPROTO);
+ }
+
+ } else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) {
+ irq_warn("Perror for epid:%d\n", epid);
+ printk("FM_NUMBER: %d\n", reg->r_usb_fm_number & 0x7ff);
+ printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+ __dump_urb(urb);
+ debug_epid(epid);
+
+ if (!(ept_data & IO_MASK(R_USB_EPT_DATA, valid))) {
+ /* invalid ep_id */
+ panic("Perror because of invalid epid."
+ " Deconfigured too early?");
+ } else {
+ /* past eof1, near eof, zout transfer, setup transfer */
+ /* Dump the urb and the relevant EP descriptor. */
+ panic("Something wrong with DMA descriptor contents."
+ " Too much traffic inserted?");
+ }
+ } else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) {
+ /* buffer ourun */
+ printk("FM_NUMBER: %d\n", reg->r_usb_fm_number & 0x7ff);
+ printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+ __dump_urb(urb);
+ debug_epid(epid);
+
+ panic("Buffer overrun/underrun for epid:%d. DMA too busy?", epid);
+ } else {
+ irq_warn("Attention on epid:%d (%s %s) with no error code\n", epid,
+ str_dir(urb->pipe), str_type(urb->pipe));
+ printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+ __dump_urb(urb);
+ debug_epid(epid);
+ }
+
+ } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code,
+ stall)) {
+ /* Not really a protocol error, just says that the endpoint gave
+ a stall response. Note that error_code cannot be stall for isoc. */
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+ panic("Isoc traffic cannot stall");
+ }
+
+ tc_dbg("Stall for epid:%d (%s %s) URB:0x%x\n", epid,
+ str_dir(urb->pipe), str_type(urb->pipe), (unsigned int)urb);
+ tc_finish_urb(hcd, urb, -EPIPE);
+
+ } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code,
+ bus_error)) {
+ /* Two devices responded to a transaction request. Must be resolved
+ by software. FIXME: Reset ports? */
+ panic("Bus error for epid %d."
+ " Two devices responded to transaction request\n",
+ epid);
+
+ } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code,
+ buffer_error)) {
+ /* DMA overrun or underrun. */
+ irq_warn("Buffer overrun/underrun for epid:%d (%s %s)\n", epid,
+ str_dir(urb->pipe), str_type(urb->pipe));
+
+ /* It seems that error_code = buffer_error in
+ R_USB_EPT_DATA/R_USB_EPT_DATA_ISO and ourun = yes in R_USB_STATUS
+ are the same error. */
+ tc_finish_urb(hcd, urb, -EPROTO);
+ } else {
+ irq_warn("Unknown attention on epid:%d (%s %s)\n", epid,
+ str_dir(urb->pipe), str_type(urb->pipe));
+ dump_ept_data(epid);
+ }
+ }
+ }
+ DBFEXIT;
+}
+
+void crisv10_hcd_port_status_irq(struct crisv10_irq_reg *reg)
+{
+ __u16 port_reg[USB_ROOT_HUB_PORTS];
+ DBFENTER;
+ port_reg[0] = reg->r_usb_rh_port_status_1;
+ port_reg[1] = reg->r_usb_rh_port_status_2;
+ rh_port_status_change(port_reg);
+ DBFEXIT;
+}
+
+void crisv10_hcd_isoc_eof_irq(struct crisv10_irq_reg *reg)
+{
+ int epid;
+ struct urb *urb;
+ struct crisv10_urb_priv *urb_priv;
+
+ DBFENTER;
+
+ for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
+
+ /* Only check epids that are in use, is valid and has SB list */
+ if (!epid_inuse(epid) || epid == INVALID_EPID ||
+ TxIsocEPList[epid].sub == 0 || epid == DUMMY_EPID) {
+ /* Nothing here to see. */
+ continue;
+ }
+ ASSERT(epid_isoc(epid));
+
+ /* Get the active URB for this epid (if any). */
+ urb = activeUrbList[epid];
+ if (urb == 0) {
+ isoc_warn("Ignoring NULL urb for epid:%d\n", epid);
+ continue;
+ }
+ if(!epid_out_traffic(epid)) {
+ /* Sanity check. */
+ ASSERT(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
+
+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+ ASSERT(urb_priv);
+
+ if (urb_priv->urb_state == NOT_STARTED) {
+ /* If ASAP is not set and urb->start_frame is the current frame,
+ start the transfer. */
+ if (!(urb->transfer_flags & URB_ISO_ASAP) &&
+ (urb->start_frame == (*R_USB_FM_NUMBER & 0x7ff))) {
+ /* EP should not be enabled if we're waiting for start_frame */
+ ASSERT((TxIsocEPList[epid].command &
+ IO_STATE(USB_EP_command, enable, yes)) == 0);
+
+ isoc_warn("Enabling isoc IN EP descr for epid %d\n", epid);
+ TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
+
+ /* This urb is now active. */
+ urb_priv->urb_state = STARTED;
+ continue;
+ }
+ }
+ }
+ }
+
+ DBFEXIT;
+}
+
+void crisv10_hcd_ctl_status_irq(struct crisv10_irq_reg *reg)
+{
+ struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(reg->hcd);
+
+ DBFENTER;
+ ASSERT(crisv10_hcd);
+
+ irq_dbg("ctr_status_irq, controller status: %s\n",
+ hcd_status_to_str(reg->r_usb_status));
+
+ /* FIXME: What should we do if we get ourun or perror? Dump the EP and SB
+ list for the corresponding epid? */
+ if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) {
+ panic("USB controller got ourun.");
+ }
+ if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) {
+
+ /* Before, etrax_usb_do_intr_recover was called on this epid if it was
+ an interrupt pipe. I don't see how re-enabling all EP descriptors
+ will help if there was a programming error. */
+ panic("USB controller got perror.");
+ }
+
+ /* Keep track of USB Controller, if it's running or not */
+ if(reg->r_usb_status & IO_STATE(R_USB_STATUS, running, yes)) {
+ crisv10_hcd->running = 1;
+ } else {
+ crisv10_hcd->running = 0;
+ }
+
+ if (reg->r_usb_status & IO_MASK(R_USB_STATUS, device_mode)) {
+ /* We should never operate in device mode. */
+ panic("USB controller in device mode.");
+ }
+
+ /* Set the flag to avoid getting "Unlink after no-IRQ? Controller is probably
+ using the wrong IRQ" from hcd_unlink_urb() in drivers/usb/core/hcd.c */
+ set_bit(HCD_FLAG_SAW_IRQ, ®->hcd->flags);
+
+ DBFEXIT;
+}
+
+
+/******************************************************************/
+/* Host Controller interface functions */
+/******************************************************************/
+
+static inline void crisv10_ready_wait(void) {
+ volatile int timeout = 10000;
+ /* Check the busy bit of USB controller in Etrax */
+ while((*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)) &&
+ (timeout-- > 0));
+ if(timeout == 0) {
+ warn("Timeout while waiting for USB controller to be idle\n");
+ }
+}
+
+/* reset host controller */
+static int crisv10_hcd_reset(struct usb_hcd *hcd)
+{
+ DBFENTER;
+ hcd_dbg(hcd, "reset\n");
+
+
+ /* Reset the USB interface. */
+ /*
+ *R_USB_COMMAND =
+ IO_STATE(R_USB_COMMAND, port_sel, nop) |
+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+ IO_STATE(R_USB_COMMAND, ctrl_cmd, reset);
+ nop();
+ */
+ DBFEXIT;
+ return 0;
+}
+
+/* start host controller */
+static int crisv10_hcd_start(struct usb_hcd *hcd)
+{
+ DBFENTER;
+ hcd_dbg(hcd, "start\n");
+
+ crisv10_ready_wait();
+
+ /* Start processing of USB traffic. */
+ *R_USB_COMMAND =
+ IO_STATE(R_USB_COMMAND, port_sel, nop) |
+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+ IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
+
+ nop();
+
+ hcd->state = HC_STATE_RUNNING;
+
+ DBFEXIT;
+ return 0;
+}
+
+/* stop host controller */
+static void crisv10_hcd_stop(struct usb_hcd *hcd)
+{
+ DBFENTER;
+ hcd_dbg(hcd, "stop\n");
+ crisv10_hcd_reset(hcd);
+ DBFEXIT;
+}
+
+/* return the current frame number */
+static int crisv10_hcd_get_frame(struct usb_hcd *hcd)
+{
+ DBFENTER;
+ DBFEXIT;
+ return (*R_USB_FM_NUMBER & 0x7ff);
+}
+
+#ifdef CONFIG_USB_OTG
+
+static int crisv10_hcd_start_port_reset(struct usb_hcd *hcd, unsigned port)
+{
+ return 0; /* no-op for now */
+}
+
+#endif /* CONFIG_USB_OTG */
+
+
+/******************************************************************/
+/* Root Hub functions */
+/******************************************************************/
+
+/* root hub status */
+static const struct usb_hub_status rh_hub_status =
+ {
+ .wHubStatus = 0,
+ .wHubChange = 0,
+ };
+
+/* root hub descriptor */
+static const u8 rh_hub_descr[] =
+ {
+ 0x09, /* bDescLength */
+ 0x29, /* bDescriptorType */
+ USB_ROOT_HUB_PORTS, /* bNbrPorts */
+ 0x00, /* wHubCharacteristics */
+ 0x00,
+ 0x01, /* bPwrOn2pwrGood */
+ 0x00, /* bHubContrCurrent */
+ 0x00, /* DeviceRemovable */
+ 0xff /* PortPwrCtrlMask */
+ };
+
+/* Actual holder of root hub status*/
+struct crisv10_rh rh;
+
+/* Initialize root hub data structures (called from dvdrv_hcd_probe()) */
+int rh_init(void) {
+ int i;
+ /* Reset port status flags */
+ for (i = 0; i < USB_ROOT_HUB_PORTS; i++) {
+ rh.wPortChange[i] = 0;
+ rh.wPortStatusPrev[i] = 0;
+ }
+ return 0;
+}
+
+#define RH_FEAT_MASK ((1<<USB_PORT_FEAT_CONNECTION)|\
+ (1<<USB_PORT_FEAT_ENABLE)|\
+ (1<<USB_PORT_FEAT_SUSPEND)|\
+ (1<<USB_PORT_FEAT_RESET))
+
+/* Handle port status change interrupt (called from bottom part interrupt) */
+void rh_port_status_change(__u16 port_reg[]) {
+ int i;
+ __u16 wChange;
+
+ for(i = 0; i < USB_ROOT_HUB_PORTS; i++) {
+ /* Xor out changes since last read, masked for important flags */
+ wChange = (port_reg[i] & RH_FEAT_MASK) ^ rh.wPortStatusPrev[i];
+ /* Or changes together with (if any) saved changes */
+ rh.wPortChange[i] |= wChange;
+ /* Save new status */
+ rh.wPortStatusPrev[i] = port_reg[i];
+
+ if(wChange) {
+ rh_dbg("Interrupt port_status change port%d: %s Current-status:%s\n", i+1,
+ port_status_to_str(wChange),
+ port_status_to_str(port_reg[i]));
+ }
+ }
+}
+
+/* Construct port status change bitmap for the root hub */
+static int rh_status_data_request(struct usb_hcd *hcd, char *buf)
+{
+ struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+ unsigned int i;
+
+ DBFENTER;
+ /*
+ * corresponds to hub status change EP (USB 2.0 spec section 11.13.4)
+ * return bitmap indicating ports with status change
+ */
+ *buf = 0;
+ spin_lock(&crisv10_hcd->lock);
+ for (i = 1; i <= crisv10_hcd->num_ports; i++) {
+ if (rh.wPortChange[map_port(i)]) {
+ *buf |= (1 << i);
+ rh_dbg("rh_status_data_request, change on port %d: %s Current Status: %s\n", i,
+ port_status_to_str(rh.wPortChange[map_port(i)]),
+ port_status_to_str(rh.wPortStatusPrev[map_port(i)]));
+ }
+ }
+ spin_unlock(&crisv10_hcd->lock);
+ DBFEXIT;
+ return *buf == 0 ? 0 : 1;
+}
+
+/* Handle a control request for the root hub (called from hcd_driver) */
+static int rh_control_request(struct usb_hcd *hcd,
+ u16 typeReq,
+ u16 wValue,
+ u16 wIndex,
+ char *buf,
+ u16 wLength) {
+
+ struct crisv10_hcd *crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+ int retval = 0;
+ int len;
+ DBFENTER;
+
+ switch (typeReq) {
+ case GetHubDescriptor:
+ rh_dbg("GetHubDescriptor\n");
+ len = min_t(unsigned int, sizeof rh_hub_descr, wLength);
+ memcpy(buf, rh_hub_descr, len);
+ buf[2] = crisv10_hcd->num_ports;
+ break;
+ case GetHubStatus:
+ rh_dbg("GetHubStatus\n");
+ len = min_t(unsigned int, sizeof rh_hub_status, wLength);
+ memcpy(buf, &rh_hub_status, len);
+ break;
+ case GetPortStatus:
+ if (!wIndex || wIndex > crisv10_hcd->num_ports)
+ goto error;
+ rh_dbg("GetportStatus, port:%d change:%s status:%s\n", wIndex,
+ port_status_to_str(rh.wPortChange[map_port(wIndex)]),
+ port_status_to_str(rh.wPortStatusPrev[map_port(wIndex)]));
+ *(u16 *) buf = cpu_to_le16(rh.wPortStatusPrev[map_port(wIndex)]);
+ *(u16 *) (buf + 2) = cpu_to_le16(rh.wPortChange[map_port(wIndex)]);
+ break;
+ case SetHubFeature:
+ rh_dbg("SetHubFeature\n");
+ case ClearHubFeature:
+ rh_dbg("ClearHubFeature\n");
+ switch (wValue) {
+ case C_HUB_OVER_CURRENT:
+ case C_HUB_LOCAL_POWER:
+ rh_warn("Not implemented hub request:%d \n", typeReq);
+ /* not implemented */
+ break;
+ default:
+ goto error;
+ }
+ break;
+ case SetPortFeature:
+ if (!wIndex || wIndex > crisv10_hcd->num_ports)
+ goto error;
+ if(rh_set_port_feature(map_port(wIndex), wValue))
+ goto error;
+ break;
+ case ClearPortFeature:
+ if (!wIndex || wIndex > crisv10_hcd->num_ports)
+ goto error;
+ if(rh_clear_port_feature(map_port(wIndex), wValue))
+ goto error;
+ break;
+ default:
+ rh_warn("Unknown hub request: %d\n", typeReq);
+ error:
+ retval = -EPIPE;
+ }
+ DBFEXIT;
+ return retval;
+}
+
+int rh_set_port_feature(__u8 bPort, __u16 wFeature) {
+ __u8 bUsbCommand = 0;
+ __u8 reset_cnt;
+ switch(wFeature) {
+ case USB_PORT_FEAT_RESET:
+ rh_dbg("SetPortFeature: reset\n");
+
+ if (rh.wPortStatusPrev[bPort] &
+ IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes))
+ {
+ __u8 restart_controller = 0;
+
+ if ( (rh.wPortStatusPrev[0] &
+ IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes)) &&
+ (rh.wPortStatusPrev[1] &
+ IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, yes)) )
+ {
+ /* Both ports is enabled. The USB controller will not change state. */
+ restart_controller = 0;
+ }
+ else
+ {
+ /* Only ports is enabled. The USB controller will change state and
+ must be restarted. */
+ restart_controller = 1;
+ }
+ /*
+ In ETRAX 100LX it's not possible to reset an enabled root hub port.
+ The workaround is to disable and enable the port before resetting it.
+ Disabling the port can, if both ports are disabled at once, cause the
+ USB controller to change state to HOST_MODE state.
+ The USB controller state transition causes a lot of unwanted
+ interrupts that must be avoided.
+ Disabling the USB controller status and port status interrupts before
+ disabling/resetting the port stops these interrupts.
+
+ These actions are performed:
+ 1. Disable USB controller status and port status interrupts.
+ 2. Disable the port
+ 3. Wait for the port to be disabled.
+ 4. Enable the port.
+ 5. Wait for the port to be enabled.
+ 6. Reset the port.
+ 7. Wait for for the reset to end.
+ 8. Wait for the USB controller entering started state.
+ 9. Order the USB controller to running state.
+ 10. Wait for the USB controller reaching running state.
+ 11. Clear all interrupts generated during the disable/enable/reset
+ procedure.
+ 12. Enable the USB controller status and port status interrupts.
+ */
+
+ /* 1. Disable USB controller status and USB port status interrupts. */
+ *R_USB_IRQ_MASK_CLR = IO_STATE(R_USB_IRQ_MASK_CLR, ctl_status, clr);
+ __asm__ __volatile__ (" nop");
+ *R_USB_IRQ_MASK_CLR = IO_STATE(R_USB_IRQ_MASK_CLR, port_status, clr);
+ __asm__ __volatile__ (" nop");
+
+ {
+
+ /* Since an root hub port reset shall be 50 ms and the ETRAX 100LX
+ root hub port reset is 10 ms we must perform 5 port resets to
+ achieve a proper root hub port reset. */
+ for (reset_cnt = 0; reset_cnt < 5; reset_cnt ++)
+ {
+ rh_dbg("Disable Port %d\n", bPort + 1);
+
+ /* 2. Disable the port*/
+ if (bPort == 0)
+ {
+ *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, yes);
+ }
+ else
+ {
+ *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, yes);
+ }
+
+ /* 3. Wait for the port to be disabled. */
+ while ( (bPort == 0) ?
+ *R_USB_RH_PORT_STATUS_1 &
+ IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes) :
+ *R_USB_RH_PORT_STATUS_2 &
+ IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, yes) ) {}
+
+ rh_dbg("Port %d is disabled. Enable it!\n", bPort + 1);
+
+ /* 4. Enable the port. */
+ if (bPort == 0)
+ {
+ *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no);
+ }
+ else
+ {
+ *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no);
+ }
+
+ /* 5. Wait for the port to be enabled again. */
+ while (!( (bPort == 0) ?
+ *R_USB_RH_PORT_STATUS_1 &
+ IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes) :
+ *R_USB_RH_PORT_STATUS_2 &
+ IO_STATE(R_USB_RH_PORT_STATUS_2, connected, yes) ) ) {}
+
+ rh_dbg("Port %d is enabled.\n", bPort + 1);
+
+ /* 6. Reset the port */
+ crisv10_ready_wait();
+ *R_USB_COMMAND =
+ ( (bPort == 0) ?
+ IO_STATE(R_USB_COMMAND, port_sel, port1):
+ IO_STATE(R_USB_COMMAND, port_sel, port2) ) |
+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+ IO_STATE(R_USB_COMMAND, busy, no) |
+ IO_STATE(R_USB_COMMAND, ctrl_cmd, nop);
+ rh_dbg("Port %d is resetting.\n", bPort + 1);
+
+ /* 7. The USB specification says that we should wait for at least
+ 10ms for device recover */
+ udelay(10500); /* 10,5ms blocking wait */
+
+ crisv10_ready_wait();
+ }
+ }
+
+
+ /* Check if the USB controller needs to be restarted. */
+ if (restart_controller)
+ {
+ /* 8. Wait for the USB controller entering started state. */
+ while (!(*R_USB_STATUS & IO_STATE(R_USB_STATUS, started, yes))) {}
+
+ /* 9. Order the USB controller to running state. */
+ crisv10_ready_wait();
+ *R_USB_COMMAND =
+ IO_STATE(R_USB_COMMAND, port_sel, nop) |
+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+ IO_STATE(R_USB_COMMAND, busy, no) |
+ IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
+
+ /* 10. Wait for the USB controller reaching running state. */
+ while (!(*R_USB_STATUS & IO_STATE(R_USB_STATUS, running, yes))) {}
+ }
+
+ /* 11. Clear any controller or port satus interrupts before enabling
+ the interrupts. */
+ {
+ u16 dummy;
+
+ /* Clear the port status interrupt of the reset port. */
+ if (bPort == 0)
+ {
+ rh_dbg("Clearing port 1 interrupts\n");
+ dummy = *R_USB_RH_PORT_STATUS_1;
+ }
+ else
+ {
+ rh_dbg("Clearing port 2 interrupts\n");
+ dummy = *R_USB_RH_PORT_STATUS_2;
+ }
+
+ if (restart_controller)
+ {
+ /* The USB controller is restarted. Clear all interupts. */
+ rh_dbg("Clearing all interrupts\n");
+ dummy = *R_USB_STATUS;
+ dummy = *R_USB_RH_PORT_STATUS_1;
+ dummy = *R_USB_RH_PORT_STATUS_2;
+ }
+ }
+
+ /* 12. Enable USB controller status and USB port status interrupts. */
+ *R_USB_IRQ_MASK_SET = IO_STATE(R_USB_IRQ_MASK_SET, ctl_status, set);
+ __asm__ __volatile__ (" nop");
+ *R_USB_IRQ_MASK_SET = IO_STATE(R_USB_IRQ_MASK_SET, port_status, set);
+ __asm__ __volatile__ (" nop");
+
+ }
+ else
+ {
+
+ bUsbCommand |= IO_STATE(R_USB_COMMAND, port_cmd, reset);
+ /* Select which port via the port_sel field */
+ bUsbCommand |= IO_FIELD(R_USB_COMMAND, port_sel, bPort+1);
+
+ /* Make sure the controller isn't busy. */
+ crisv10_ready_wait();
+ /* Send out the actual command to the USB controller */
+ *R_USB_COMMAND = bUsbCommand;
+
+ /* Wait a while for controller to first become started after port reset */
+ udelay(12000); /* 12ms blocking wait */
+
+ /* Make sure the controller isn't busy. */
+ crisv10_ready_wait();
+
+ /* If all enabled ports were disabled the host controller goes down into
+ started mode, so we need to bring it back into the running state.
+ (This is safe even if it's already in the running state.) */
+ *R_USB_COMMAND =
+ IO_STATE(R_USB_COMMAND, port_sel, nop) |
+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+ IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
+ }
+
+ break;
+ case USB_PORT_FEAT_SUSPEND:
+ rh_dbg("SetPortFeature: suspend\n");
+ bUsbCommand |= IO_STATE(R_USB_COMMAND, port_cmd, suspend);
+ goto set;
+ break;
+ case USB_PORT_FEAT_POWER:
+ rh_dbg("SetPortFeature: power\n");
+ break;
+ case USB_PORT_FEAT_C_CONNECTION:
+ rh_dbg("SetPortFeature: c_connection\n");
+ break;
+ case USB_PORT_FEAT_C_RESET:
+ rh_dbg("SetPortFeature: c_reset\n");
+ break;
+ case USB_PORT_FEAT_C_OVER_CURRENT:
+ rh_dbg("SetPortFeature: c_over_current\n");
+ break;
+
+ set:
+ /* Select which port via the port_sel field */
+ bUsbCommand |= IO_FIELD(R_USB_COMMAND, port_sel, bPort+1);
+
+ /* Make sure the controller isn't busy. */
+ crisv10_ready_wait();
+ /* Send out the actual command to the USB controller */
+ *R_USB_COMMAND = bUsbCommand;
+ break;
+ default:
+ rh_dbg("SetPortFeature: unknown feature\n");
+ return -1;
+ }
+ return 0;
+}
+
+int rh_clear_port_feature(__u8 bPort, __u16 wFeature) {
+ switch(wFeature) {
+ case USB_PORT_FEAT_ENABLE:
+ rh_dbg("ClearPortFeature: enable\n");
+ rh_disable_port(bPort);
+ break;
+ case USB_PORT_FEAT_SUSPEND:
+ rh_dbg("ClearPortFeature: suspend\n");
+ break;
+ case USB_PORT_FEAT_POWER:
+ rh_dbg("ClearPortFeature: power\n");
+ break;
+
+ case USB_PORT_FEAT_C_ENABLE:
+ rh_dbg("ClearPortFeature: c_enable\n");
+ goto clear;
+ case USB_PORT_FEAT_C_SUSPEND:
+ rh_dbg("ClearPortFeature: c_suspend\n");
+ goto clear;
+ case USB_PORT_FEAT_C_CONNECTION:
+ rh_dbg("ClearPortFeature: c_connection\n");
+ goto clear;
+ case USB_PORT_FEAT_C_OVER_CURRENT:
+ rh_dbg("ClearPortFeature: c_over_current\n");
+ goto clear;
+ case USB_PORT_FEAT_C_RESET:
+ rh_dbg("ClearPortFeature: c_reset\n");
+ goto clear;
+ clear:
+ rh.wPortChange[bPort] &= ~(1 << (wFeature - 16));
+ break;
+ default:
+ rh_dbg("ClearPortFeature: unknown feature\n");
+ return -1;
+ }
+ return 0;
+}
+
+
+#ifdef CONFIG_PM
+/* Handle a suspend request for the root hub (called from hcd_driver) */
+static int rh_suspend_request(struct usb_hcd *hcd)
+{
+ return 0; /* no-op for now */
+}
+
+/* Handle a resume request for the root hub (called from hcd_driver) */
+static int rh_resume_request(struct usb_hcd *hcd)
+{
+ return 0; /* no-op for now */
+}
+#endif /* CONFIG_PM */
+
+
+
+/* Wrapper function for workaround port disable registers in USB controller */
+static void rh_disable_port(unsigned int port) {
+ volatile int timeout = 10000;
+ volatile char* usb_portx_disable;
+ switch(port) {
+ case 0:
+ usb_portx_disable = R_USB_PORT1_DISABLE;
+ break;
+ case 1:
+ usb_portx_disable = R_USB_PORT2_DISABLE;
+ break;
+ default:
+ /* Invalid port index */
+ return;
+ }
+ /* Set disable flag in special register */
+ *usb_portx_disable = IO_STATE(R_USB_PORT1_DISABLE, disable, yes);
+ /* Wait until not enabled anymore */
+ while((rh.wPortStatusPrev[port] &
+ IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes)) &&
+ (timeout-- > 0));
+ if(timeout == 0) {
+ warn("Timeout while waiting for port %d to become disabled\n", port);
+ }
+ /* clear disable flag in special register */
+ *usb_portx_disable = IO_STATE(R_USB_PORT1_DISABLE, disable, no);
+ rh_info("Physical port %d disabled\n", port+1);
+}
+
+
+/******************************************************************/
+/* Transfer Controller (TC) functions */
+/******************************************************************/
+
+/* FIXME: Should RX_BUF_SIZE be a config option, or maybe we should adjust it
+ dynamically?
+ To adjust it dynamically we would have to get an interrupt when we reach
+ the end of the rx descriptor list, or when we get close to the end, and
+ then allocate more descriptors. */
+#define NBR_OF_RX_DESC 512
+#define RX_DESC_BUF_SIZE 1024
+#define RX_BUF_SIZE (NBR_OF_RX_DESC * RX_DESC_BUF_SIZE)
+
+
+/* Local variables for Transfer Controller */
+/* --------------------------------------- */
+
+/* This is a circular (double-linked) list of the active urbs for each epid.
+ The head is never removed, and new urbs are linked onto the list as
+ urb_entry_t elements. Don't reference urb_list directly; use the wrapper
+ functions instead (which includes spin_locks) */
+static struct list_head urb_list[NBR_OF_EPIDS];
+
+/* Read about the need and usage of this lock in submit_ctrl_urb. */
+/* Lock for URB lists for each EPID */
+static spinlock_t urb_list_lock;
+
+/* Lock for EPID array register (R_USB_EPT_x) in Etrax */
+static spinlock_t etrax_epid_lock;
+
+/* Lock for dma8 sub0 handling */
+static spinlock_t etrax_dma8_sub0_lock;
+
+/* DMA IN cache bug. Align the DMA IN buffers to 32 bytes, i.e. a cache line.
+ Since RX_DESC_BUF_SIZE is 1024 is a multiple of 32, all rx buffers will be
+ cache aligned. */
+static volatile unsigned char RxBuf[RX_BUF_SIZE] __attribute__ ((aligned (32)));
+static volatile struct USB_IN_Desc RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned (4)));
+
+/* Pointers into RxDescList. */
+static volatile struct USB_IN_Desc *myNextRxDesc;
+static volatile struct USB_IN_Desc *myLastRxDesc;
+
+/* A zout transfer makes a memory access at the address of its buf pointer,
+ which means that setting this buf pointer to 0 will cause an access to the
+ flash. In addition to this, setting sw_len to 0 results in a 16/32 bytes
+ (depending on DMA burst size) transfer.
+ Instead, we set it to 1, and point it to this buffer. */
+static int zout_buffer[4] __attribute__ ((aligned (4)));
+
+/* Cache for allocating new EP and SB descriptors. */
+static struct kmem_cache *usb_desc_cache;
+
+/* Cache for the data allocated in the isoc descr top half. */
+static struct kmem_cache *isoc_compl_cache;
+
+/* Cache for the data allocated when delayed finishing of URBs */
+static struct kmem_cache *later_data_cache;
+
+
+/* Counter to keep track of how many Isoc EP we have sat up. Used to enable
+ and disable iso_eof interrupt. We only need these interrupts when we have
+ Isoc data endpoints (consumes CPU cycles).
+ FIXME: This could be more fine granular, so this interrupt is only enabled
+ when we have a In Isoc URB not URB_ISO_ASAP flaged queued. */
+static int isoc_epid_counter;
+
+/* Protecting wrapper functions for R_USB_EPT_x */
+/* -------------------------------------------- */
+static inline void etrax_epid_set(__u8 index, __u32 data) {
+ unsigned long flags;
+ spin_lock_irqsave(&etrax_epid_lock, flags);
+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+ nop();
+ *R_USB_EPT_DATA = data;
+ spin_unlock_irqrestore(&etrax_epid_lock, flags);
+}
+
+static inline void etrax_epid_clear_error(__u8 index) {
+ unsigned long flags;
+ spin_lock_irqsave(&etrax_epid_lock, flags);
+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+ nop();
+ *R_USB_EPT_DATA &=
+ ~(IO_MASK(R_USB_EPT_DATA, error_count_in) |
+ IO_MASK(R_USB_EPT_DATA, error_count_out) |
+ IO_MASK(R_USB_EPT_DATA, error_code));
+ spin_unlock_irqrestore(&etrax_epid_lock, flags);
+}
+
+static inline void etrax_epid_set_toggle(__u8 index, __u8 dirout,
+ __u8 toggle) {
+ unsigned long flags;
+ spin_lock_irqsave(&etrax_epid_lock, flags);
+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+ nop();
+ if(dirout) {
+ *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_out);
+ *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_out, toggle);
+ } else {
+ *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_in);
+ *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_in, toggle);
+ }
+ spin_unlock_irqrestore(&etrax_epid_lock, flags);
+}
+
+static inline __u8 etrax_epid_get_toggle(__u8 index, __u8 dirout) {
+ unsigned long flags;
+ __u8 toggle;
+ spin_lock_irqsave(&etrax_epid_lock, flags);
+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+ nop();
+ if (dirout) {
+ toggle = IO_EXTRACT(R_USB_EPT_DATA, t_out, *R_USB_EPT_DATA);
+ } else {
+ toggle = IO_EXTRACT(R_USB_EPT_DATA, t_in, *R_USB_EPT_DATA);
+ }
+ spin_unlock_irqrestore(&etrax_epid_lock, flags);
+ return toggle;
+}
+
+
+static inline __u32 etrax_epid_get(__u8 index) {
+ unsigned long flags;
+ __u32 data;
+ spin_lock_irqsave(&etrax_epid_lock, flags);
+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+ nop();
+ data = *R_USB_EPT_DATA;
+ spin_unlock_irqrestore(&etrax_epid_lock, flags);
+ return data;
+}
+
+
+
+
+/* Main functions for Transfer Controller */
+/* -------------------------------------- */
+
+/* Init structs, memories and lists used by Transfer Controller */
+int tc_init(struct usb_hcd *hcd) {
+ int i;
+ /* Clear software state info for all epids */
+ memset(epid_state, 0, sizeof(struct etrax_epid) * NBR_OF_EPIDS);
+
+ /* Set Invalid and Dummy as being in use and disabled */
+ epid_state[INVALID_EPID].inuse = 1;
+ epid_state[DUMMY_EPID].inuse = 1;
+ epid_state[INVALID_EPID].disabled = 1;
+ epid_state[DUMMY_EPID].disabled = 1;
+
+ /* Clear counter for how many Isoc epids we have sat up */
+ isoc_epid_counter = 0;
+
+ /* Initialize the urb list by initiating a head for each list.
+ Also reset list hodling active URB for each epid */
+ for (i = 0; i < NBR_OF_EPIDS; i++) {
+ INIT_LIST_HEAD(&urb_list[i]);
+ activeUrbList[i] = NULL;
+ }
+
+ /* Init lock for URB lists */
+ spin_lock_init(&urb_list_lock);
+ /* Init lock for Etrax R_USB_EPT register */
+ spin_lock_init(&etrax_epid_lock);
+ /* Init lock for Etrax dma8 sub0 handling */
+ spin_lock_init(&etrax_dma8_sub0_lock);
+
+ /* We use kmem_cache_* to make sure that all DMA desc. are dword aligned */
+
+ /* Note that we specify sizeof(struct USB_EP_Desc) as the size, but also
+ allocate SB descriptors from this cache. This is ok since
+ sizeof(struct USB_EP_Desc) == sizeof(struct USB_SB_Desc). */
+ usb_desc_cache = kmem_cache_create("usb_desc_cache",
+ sizeof(struct USB_EP_Desc), 0,
+ SLAB_HWCACHE_ALIGN, 0);
+ if(usb_desc_cache == NULL) {
+ return -ENOMEM;
+ }
+
+ /* Create slab cache for speedy allocation of memory for isoc bottom-half
+ interrupt handling */
+ isoc_compl_cache =
+ kmem_cache_create("isoc_compl_cache",
+ sizeof(struct crisv10_isoc_complete_data),
+ 0, SLAB_HWCACHE_ALIGN, 0);
+ if(isoc_compl_cache == NULL) {
+ return -ENOMEM;
+ }
+
+ /* Create slab cache for speedy allocation of memory for later URB finish
+ struct */
+ later_data_cache =
+ kmem_cache_create("later_data_cache",
+ sizeof(struct urb_later_data),
+ 0, SLAB_HWCACHE_ALIGN, 0);
+ if(later_data_cache == NULL) {
+ return -ENOMEM;
+ }
+
+
+ /* Initiate the bulk start timer. */
+ init_timer(&bulk_start_timer);
+ bulk_start_timer.expires = jiffies + BULK_START_TIMER_INTERVAL;
+ bulk_start_timer.function = tc_bulk_start_timer_func;
+ add_timer(&bulk_start_timer);
+
+
+ /* Initiate the bulk eot timer. */
+ init_timer(&bulk_eot_timer);
+ bulk_eot_timer.expires = jiffies + BULK_EOT_TIMER_INTERVAL;
+ bulk_eot_timer.function = tc_bulk_eot_timer_func;
+ bulk_eot_timer.data = (unsigned long)hcd;
+ add_timer(&bulk_eot_timer);
+
+ return 0;
+}
+
+/* Uninitialize all resources used by Transfer Controller */
+void tc_destroy(void) {
+
+ /* Destroy all slab cache */
+ kmem_cache_destroy(usb_desc_cache);
+ kmem_cache_destroy(isoc_compl_cache);
+ kmem_cache_destroy(later_data_cache);
+
+ /* Remove timers */
+ del_timer(&bulk_start_timer);
+ del_timer(&bulk_eot_timer);
+}
+
+static void restart_dma8_sub0(void) {
+ unsigned long flags;
+ spin_lock_irqsave(&etrax_dma8_sub0_lock, flags);
+ /* Verify that the dma is not running */
+ if ((*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd)) == 0) {
+ struct USB_EP_Desc *ep = (struct USB_EP_Desc *)phys_to_virt(*R_DMA_CH8_SUB0_EP);
+ while (DUMMY_EPID == IO_EXTRACT(USB_EP_command, epid, ep->command)) {
+ ep = (struct USB_EP_Desc *)phys_to_virt(ep->next);
+ }
+ /* Advance the DMA to the next EP descriptor that is not a DUMMY_EPID. */
+ *R_DMA_CH8_SUB0_EP = virt_to_phys(ep);
+ /* Restart the DMA */
+ *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start);
+ }
+ spin_unlock_irqrestore(&etrax_dma8_sub0_lock, flags);
+}
+
+/* queue an URB with the transfer controller (called from hcd_driver) */
+static int tc_urb_enqueue(struct usb_hcd *hcd,
+ struct urb *urb,
+ gfp_t mem_flags) {
+ int epid;
+ int retval;
+ int bustime = 0;
+ int maxpacket;
+ unsigned long flags;
+ struct crisv10_urb_priv *urb_priv;
+ struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+ DBFENTER;
+
+ if(!(crisv10_hcd->running)) {
+ /* The USB Controller is not running, probably because no device is
+ attached. No idea to enqueue URBs then */
+ tc_warn("Rejected enqueueing of URB:0x%x because no dev attached\n",
+ (unsigned int)urb);
+ return -ENOENT;
+ }
+
+ maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
+ /* Special case check for In Isoc transfers. Specification states that each
+ In Isoc transfer consists of one packet and therefore it should fit into
+ the transfer-buffer of an URB.
+ We do the check here to be sure (an invalid scenario can be produced with
+ parameters to the usbtest suite) */
+ if(usb_pipeisoc(urb->pipe) && usb_pipein(urb->pipe) &&
+ (urb->transfer_buffer_length < maxpacket)) {
+ tc_err("Submit In Isoc URB with buffer length:%d to pipe with maxpacketlen: %d\n", urb->transfer_buffer_length, maxpacket);
+ return -EMSGSIZE;
+ }
+
+ /* Check if there is a epid for URBs destination, if not this function
+ set up one. */
+ epid = tc_setup_epid(urb->ep, urb, mem_flags);
+ if (epid < 0) {
+ tc_err("Failed setup epid:%d for URB:0x%x\n", epid, (unsigned int)urb);
+ DBFEXIT;
+ return -ENOMEM;
+ }
+
+ if(urb == activeUrbList[epid]) {
+ tc_err("Resubmition of allready active URB:0x%x\n", (unsigned int)urb);
+ return -ENXIO;
+ }
+
+ if(urb_list_entry(urb, epid)) {
+ tc_err("Resubmition of allready queued URB:0x%x\n", (unsigned int)urb);
+ return -ENXIO;
+ }
+
+ /* If we actively have flaged endpoint as disabled then refuse submition */
+ if(epid_state[epid].disabled) {
+ return -ENOENT;
+ }
+
+ /* Allocate and init HC-private data for URB */
+ if(urb_priv_create(hcd, urb, epid, mem_flags) != 0) {
+ DBFEXIT;
+ return -ENOMEM;
+ }
+ urb_priv = urb->hcpriv;
+
+ /* Check if there is enough bandwidth for periodic transfer */
+ if(usb_pipeint(urb->pipe) || usb_pipeisoc(urb->pipe)) {
+ /* only check (and later claim) if not already claimed */
+ if (urb_priv->bandwidth == 0) {
+ bustime = crisv10_usb_check_bandwidth(urb->dev, urb);
+ if (bustime < 0) {
+ tc_err("Not enough periodic bandwidth\n");
+ urb_priv_free(hcd, urb);
+ DBFEXIT;
+ return -ENOSPC;
+ }
+ }
+ }
+
+ tc_dbg("Enqueue URB:0x%x[%d] epid:%d (%s) bufflen:%d\n",
+ (unsigned int)urb, urb_priv->urb_num, epid,
+ pipe_to_str(urb->pipe), urb->transfer_buffer_length);
+
+ /* Create and link SBs required for this URB */
+ retval = create_sb_for_urb(urb, mem_flags);
+ if(retval != 0) {
+ tc_err("Failed to create SBs for URB:0x%x[%d]\n", (unsigned int)urb,
+ urb_priv->urb_num);
+ urb_priv_free(hcd, urb);
+ DBFEXIT;
+ return retval;
+ }
+
+ /* Init intr EP pool if this URB is a INTR transfer. This pool is later
+ used when inserting EPs in the TxIntrEPList. We do the alloc here
+ so we can't run out of memory later */
+ if(usb_pipeint(urb->pipe)) {
+ retval = init_intr_urb(urb, mem_flags);
+ if(retval != 0) {
+ tc_warn("Failed to init Intr URB\n");
+ urb_priv_free(hcd, urb);
+ DBFEXIT;
+ return retval;
+ }
+ }
+
+ /* Disable other access when inserting USB */
+ local_irq_save(flags);
+
+ /* Claim bandwidth, if needed */
+ if(bustime) {
+ crisv10_usb_claim_bandwidth(urb->dev,
+ urb,
+ bustime,
+ (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS));
+ }
+
+ /* Add URB to EP queue */
+ urb_list_add(urb, epid, mem_flags);
+
+ if(usb_pipeisoc(urb->pipe)) {
+ /* Special processing of Isoc URBs. */
+ tc_dma_process_isoc_urb(urb);
+ } else {
+ /* Process EP queue for rest of the URB types (Bulk, Ctrl, Intr) */
+ tc_dma_process_queue(epid);
+ }
+
+ local_irq_restore(flags);
+
+ DBFEXIT;
+ return 0;
+}
+
+/* remove an URB from the transfer controller queues (called from hcd_driver)*/
+static int tc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) {
+ struct crisv10_urb_priv *urb_priv;
+ unsigned long flags;
+ int epid;
+
+ DBFENTER;
+ /* Disable interrupts here since a descriptor interrupt for the isoc epid
+ will modify the sb list. This could possibly be done more granular, but
+ urb_dequeue should not be used frequently anyway.
+ */
+ local_irq_save(flags);
+
+ urb->status = status;
+ urb_priv = urb->hcpriv;
+
+ if (!urb_priv) {
+ /* This happens if a device driver calls unlink on an urb that
+ was never submitted (lazy driver) or if the urb was completed
+ while dequeue was being called. */
+ tc_warn("Dequeing of not enqueued URB:0x%x\n", (unsigned int)urb);
+ local_irq_restore(flags);
+ return 0;
+ }
+ epid = urb_priv->epid;
+
+ tc_warn("Dequeing %s URB:0x%x[%d] (%s %s epid:%d) status:%d %s\n",
+ (urb == activeUrbList[epid]) ? "active" : "queued",
+ (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+ str_type(urb->pipe), epid, urb->status,
+ (urb_priv->later_data) ? "later-sched" : "");
+
+ /* For Bulk, Ctrl and Intr are only one URB active at a time. So any URB
+ that isn't active can be dequeued by just removing it from the queue */
+ if(usb_pipebulk(urb->pipe) || usb_pipecontrol(urb->pipe) ||
+ usb_pipeint(urb->pipe)) {
+
+ /* Check if URB haven't gone further than the queue */
+ if(urb != activeUrbList[epid]) {
+ ASSERT(urb_priv->later_data == NULL);
+ tc_warn("Dequeing URB:0x%x[%d] (%s %s epid:%d) from queue"
+ " (not active)\n", (unsigned int)urb, urb_priv->urb_num,
+ str_dir(urb->pipe), str_type(urb->pipe), epid);
+
+ /* Finish the URB with error status from USB core */
+ tc_finish_urb(hcd, urb, urb->status);
+ local_irq_restore(flags);
+ return 0;
+ }
+ }
+
+ /* Set URB status to Unlink for handling when interrupt comes. */
+ urb_priv->urb_state = UNLINK;
+
+ /* Differentiate dequeing of Bulk and Ctrl from Isoc and Intr */
+ switch(usb_pipetype(urb->pipe)) {
+ case PIPE_BULK:
+ /* Check if EP still is enabled */
+ if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+ /* The EP was enabled, disable it. */
+ TxBulkEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+ }
+ /* Kicking dummy list out of the party. */
+ TxBulkEPList[epid].next = virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]);
+ break;
+ case PIPE_CONTROL:
+ /* Check if EP still is enabled */
+ if (TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+ /* The EP was enabled, disable it. */
+ TxCtrlEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+ }
+ break;
+ case PIPE_ISOCHRONOUS:
+ /* Disabling, busy-wait and unlinking of Isoc SBs will be done in
+ finish_isoc_urb(). Because there might the case when URB is dequeued
+ but there are other valid URBs waiting */
+
+ /* Check if In Isoc EP still is enabled */
+ if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+ /* The EP was enabled, disable it. */
+ TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+ }
+ break;
+ case PIPE_INTERRUPT:
+ /* Special care is taken for interrupt URBs. EPs are unlinked in
+ tc_finish_urb */
+ break;
+ default:
+ break;
+ }
+
+ /* Asynchronous unlink, finish the URB later from scheduled or other
+ event (data finished, error) */
+ tc_finish_urb_later(hcd, urb, urb->status);
+
+ local_irq_restore(flags);
+ DBFEXIT;
+ return 0;
+}
+
+
+static void tc_sync_finish_epid(struct usb_hcd *hcd, int epid) {
+ volatile int timeout = 10000;
+ struct urb* urb;
+ struct crisv10_urb_priv* urb_priv;
+ unsigned long flags;
+
+ volatile struct USB_EP_Desc *first_ep; /* First EP in the list. */
+ volatile struct USB_EP_Desc *curr_ep; /* Current EP, the iterator. */
+ volatile struct USB_EP_Desc *next_ep; /* The EP after current. */
+
+ int type = epid_state[epid].type;
+
+ /* Setting this flag will cause enqueue() to return -ENOENT for new
+ submitions on this endpoint and finish_urb() wont process queue further */
+ epid_state[epid].disabled = 1;
+
+ switch(type) {
+ case PIPE_BULK:
+ /* Check if EP still is enabled */
+ if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+ /* The EP was enabled, disable it. */
+ TxBulkEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+ tc_warn("sync_finish: Disabling EP for epid:%d\n", epid);
+
+ /* Do busy-wait until DMA not using this EP descriptor anymore */
+ while((*R_DMA_CH8_SUB0_EP ==
+ virt_to_phys(&TxBulkEPList[epid])) &&
+ (timeout-- > 0));
+ if(timeout == 0) {
+ warn("Timeout while waiting for DMA-TX-Bulk to leave EP for"
+ " epid:%d\n", epid);
+ }
+ }
+ break;
+
+ case PIPE_CONTROL:
+ /* Check if EP still is enabled */
+ if (TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+ /* The EP was enabled, disable it. */
+ TxCtrlEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+ tc_warn("sync_finish: Disabling EP for epid:%d\n", epid);
+
+ /* Do busy-wait until DMA not using this EP descriptor anymore */
+ while((*R_DMA_CH8_SUB1_EP ==
+ virt_to_phys(&TxCtrlEPList[epid])) &&
+ (timeout-- > 0));
+ if(timeout == 0) {
+ warn("Timeout while waiting for DMA-TX-Ctrl to leave EP for"
+ " epid:%d\n", epid);
+ }
+ }
+ break;
+
+ case PIPE_INTERRUPT:
+ local_irq_save(flags);
+ /* Disable all Intr EPs belonging to epid */
+ first_ep = &TxIntrEPList[0];
+ curr_ep = first_ep;
+ do {
+ next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
+ if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
+ /* Disable EP */
+ next_ep->command &= ~IO_MASK(USB_EP_command, enable);
+ }
+ curr_ep = phys_to_virt(curr_ep->next);
+ } while (curr_ep != first_ep);
+
+ local_irq_restore(flags);
+ break;
+
+ case PIPE_ISOCHRONOUS:
+ /* Check if EP still is enabled */
+ if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+ tc_warn("sync_finish: Disabling Isoc EP for epid:%d\n", epid);
+ /* The EP was enabled, disable it. */
+ TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+
+ while((*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid])) &&
+ (timeout-- > 0));
+ if(timeout == 0) {
+ warn("Timeout while waiting for DMA-TX-Isoc to leave EP for"
+ " epid:%d\n", epid);
+ }
+ }
+ break;
+ }
+
+ local_irq_save(flags);
+
+ /* Finish if there is active URB for this endpoint */
+ if(activeUrbList[epid] != NULL) {
+ urb = activeUrbList[epid];
+ urb_priv = urb->hcpriv;
+ ASSERT(urb_priv);
+ tc_warn("Sync finish %s URB:0x%x[%d] (%s %s epid:%d) status:%d %s\n",
+ (urb == activeUrbList[epid]) ? "active" : "queued",
+ (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+ str_type(urb->pipe), epid, urb->status,
+ (urb_priv->later_data) ? "later-sched" : "");
+
+ tc_finish_urb(hcd, activeUrbList[epid], -ENOENT);
+ ASSERT(activeUrbList[epid] == NULL);
+ }
+
+ /* Finish any queued URBs for this endpoint. There won't be any resubmitions
+ because epid_disabled causes enqueue() to fail for this endpoint */
+ while((urb = urb_list_first(epid)) != NULL) {
+ urb_priv = urb->hcpriv;
+ ASSERT(urb_priv);
+
+ tc_warn("Sync finish %s URB:0x%x[%d] (%s %s epid:%d) status:%d %s\n",
+ (urb == activeUrbList[epid]) ? "active" : "queued",
+ (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+ str_type(urb->pipe), epid, urb->status,
+ (urb_priv->later_data) ? "later-sched" : "");
+
+ tc_finish_urb(hcd, urb, -ENOENT);
+ }
+ epid_state[epid].disabled = 0;
+ local_irq_restore(flags);
+}
+
+/* free resources associated with an endpoint (called from hcd_driver) */
+static void tc_endpoint_disable(struct usb_hcd *hcd,
+ struct usb_host_endpoint *ep) {
+ DBFENTER;
+ /* Only free epid if it has been allocated. We get two endpoint_disable
+ requests for ctrl endpoints so ignore the second one */
+ if(ep->hcpriv != NULL) {
+ struct crisv10_ep_priv *ep_priv = ep->hcpriv;
+ int epid = ep_priv->epid;
+ tc_warn("endpoint_disable ep:0x%x ep-priv:0x%x (%s) (epid:%d freed)\n",
+ (unsigned int)ep, (unsigned int)ep->hcpriv,
+ endpoint_to_str(&(ep->desc)), epid);
+
+ tc_sync_finish_epid(hcd, epid);
+
+ ASSERT(activeUrbList[epid] == NULL);
+ ASSERT(list_empty(&urb_list[epid]));
+
+ tc_free_epid(ep);
+ } else {
+ tc_dbg("endpoint_disable ep:0x%x ep-priv:0x%x (%s)\n", (unsigned int)ep,
+ (unsigned int)ep->hcpriv, endpoint_to_str(&(ep->desc)));
+ }
+ DBFEXIT;
+}
+
+static void tc_finish_urb_later_proc(struct work_struct* work) {
+ unsigned long flags;
+ struct urb_later_data* uld;
+
+ local_irq_save(flags);
+ uld = container_of(work, struct urb_later_data, dws.work);
+ if(uld->urb == NULL) {
+ late_dbg("Later finish of URB = NULL (allready finished)\n");
+ } else {
+ struct crisv10_urb_priv* urb_priv = uld->urb->hcpriv;
+ ASSERT(urb_priv);
+ if(urb_priv->urb_num == uld->urb_num) {
+ late_dbg("Later finish of URB:0x%x[%d]\n", (unsigned int)(uld->urb),
+ urb_priv->urb_num);
+ if(uld->status != uld->urb->status) {
+ errno_dbg("Later-finish URB with status:%d, later-status:%d\n",
+ uld->urb->status, uld->status);
+ }
+ if(uld != urb_priv->later_data) {
+ panic("Scheduled uld not same as URBs uld\n");
+ }
+ tc_finish_urb(uld->hcd, uld->urb, uld->status);
+ } else {
+ late_warn("Ignoring later finish of URB:0x%x[%d]"
+ ", urb_num doesn't match current URB:0x%x[%d]",
+ (unsigned int)(uld->urb), uld->urb_num,
+ (unsigned int)(uld->urb), urb_priv->urb_num);
+ }
+ }
+ local_irq_restore(flags);
+ kmem_cache_free(later_data_cache, uld);
+}
+
+static void tc_finish_urb_later(struct usb_hcd *hcd, struct urb *urb,
+ int status) {
+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+ struct urb_later_data* uld;
+
+ ASSERT(urb_priv);
+
+ if(urb_priv->later_data != NULL) {
+ /* Later-finish allready scheduled for this URB, just update status to
+ return when finishing later */
+ errno_dbg("Later-finish schedule change URB status:%d with new"
+ " status:%d\n", urb_priv->later_data->status, status);
+
+ urb_priv->later_data->status = status;
+ return;
+ }
+
+ uld = kmem_cache_alloc(later_data_cache, GFP_ATOMIC);
+ ASSERT(uld);
+
+ uld->hcd = hcd;
+ uld->urb = urb;
+ uld->urb_num = urb_priv->urb_num;
+ uld->status = status;
+
+ INIT_DELAYED_WORK(&uld->dws, tc_finish_urb_later_proc);
+ urb_priv->later_data = uld;
+
+ /* Schedule the finishing of the URB to happen later */
+ schedule_delayed_work(&uld->dws, LATER_TIMER_DELAY);
+}
+
+static void tc_finish_isoc_urb(struct usb_hcd *hcd, struct urb *urb,
+ int status);
+
+static void tc_finish_urb(struct usb_hcd *hcd, struct urb *urb, int status) {
+ struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+ int epid;
+ char toggle;
+ int urb_num;
+
+ DBFENTER;
+ ASSERT(urb_priv != NULL);
+ epid = urb_priv->epid;
+ urb_num = urb_priv->urb_num;
+
+ if(urb != activeUrbList[epid]) {
+ if(urb_list_entry(urb, epid)) {
+ /* Remove this URB from the list. Only happens when URB are finished
+ before having been processed (dequeing) */
+ urb_list_del(urb, epid);
+ } else {
+ tc_warn("Finishing of URB:0x%x[%d] neither active or in queue for"
+ " epid:%d\n", (unsigned int)urb, urb_num, epid);
+ }
+ }
+
+ /* Cancel any pending later-finish of this URB */
+ if(urb_priv->later_data) {
+ urb_priv->later_data->urb = NULL;
+ }
+
+ /* For an IN pipe, we always set the actual length, regardless of whether
+ there was an error or not (which means the device driver can use the data
+ if it wants to). */
+ if(usb_pipein(urb->pipe)) {
+ urb->actual_length = urb_priv->rx_offset;
+ } else {
+ /* Set actual_length for OUT urbs also; the USB mass storage driver seems
+ to want that. */
+ if (status == 0 && urb->status == -EINPROGRESS) {
+ urb->actual_length = urb->transfer_buffer_length;
+ } else {
+ /* We wouldn't know of any partial writes if there was an error. */
+ urb->actual_length = 0;
+ }
+ }
+
+
+ /* URB status mangling */
+ if(urb->status == -EINPROGRESS) {
+ /* The USB core hasn't changed the status, let's set our finish status */
+ urb->status = status;
+
+ if ((status == 0) && (urb->transfer_flags & URB_SHORT_NOT_OK) &&
+ usb_pipein(urb->pipe) &&
+ (urb->actual_length != urb->transfer_buffer_length)) {
+ /* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's
+ max length) is to be treated as an error. */
+ errno_dbg("Finishing URB:0x%x[%d] with SHORT_NOT_OK flag and short"
+ " data:%d\n", (unsigned int)urb, urb_num,
+ urb->actual_length);
+ urb->status = -EREMOTEIO;
+ }
+
+ if(urb_priv->urb_state == UNLINK) {
+ /* URB has been requested to be unlinked asynchronously */
+ urb->status = -ECONNRESET;
+ errno_dbg("Fixing unlink status of URB:0x%x[%d] to:%d\n",
+ (unsigned int)urb, urb_num, urb->status);
+ }
+ } else {
+ /* The USB Core wants to signal some error via the URB, pass it through */
+ }
+
+ /* use completely different finish function for Isoc URBs */
+ if(usb_pipeisoc(urb->pipe)) {
+ tc_finish_isoc_urb(hcd, urb, status);
+ return;
+ }
+
+ /* Do special unlinking of EPs for Intr traffic */
+ if(usb_pipeint(urb->pipe)) {
+ tc_dma_unlink_intr_urb(urb);
+ }
+
+ /* Release allocated bandwidth for periodic transfers */
+ if(usb_pipeint(urb->pipe) || usb_pipeisoc(urb->pipe))
+ crisv10_usb_release_bandwidth(hcd,
+ usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS,
+ urb_priv->bandwidth);
+
+ /* This URB is active on EP */
+ if(urb == activeUrbList[epid]) {
+ /* We need to fiddle with the toggle bits because the hardware doesn't do
+ it for us. */
+ toggle = etrax_epid_get_toggle(epid, usb_pipeout(urb->pipe));
+ usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+ usb_pipeout(urb->pipe), toggle);
+
+ /* Checks for Ctrl and Bulk EPs */
+ switch(usb_pipetype(urb->pipe)) {
+ case PIPE_BULK:
+ /* Check so Bulk EP realy is disabled before finishing active URB */
+ ASSERT((TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) ==
+ IO_STATE(USB_EP_command, enable, no));
+ /* Disable sub-pointer for EP to avoid next tx_interrupt() to
+ process Bulk EP. */
+ TxBulkEPList[epid].sub = 0;
+ /* No need to wait for the DMA before changing the next pointer.
+ The modulo NBR_OF_EPIDS isn't actually necessary, since we will never use
+ the last one (INVALID_EPID) for actual traffic. */
+ TxBulkEPList[epid].next =
+ virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]);
+ break;
+ case PIPE_CONTROL:
+ /* Check so Ctrl EP realy is disabled before finishing active URB */
+ ASSERT((TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) ==
+ IO_STATE(USB_EP_command, enable, no));
+ /* Disable sub-pointer for EP to avoid next tx_interrupt() to
+ process Ctrl EP. */
+ TxCtrlEPList[epid].sub = 0;
+ break;
+ }
+ }
+
+ /* Free HC-private URB data*/
+ urb_priv_free(hcd, urb);
+
+ if(urb->status) {
+ errno_dbg("finish_urb (URB:0x%x[%d] %s %s) (data:%d) status:%d\n",
+ (unsigned int)urb, urb_num, str_dir(urb->pipe),
+ str_type(urb->pipe), urb->actual_length, urb->status);
+ } else {
+ tc_dbg("finish_urb (URB:0x%x[%d] %s %s) (data:%d) status:%d\n",
+ (unsigned int)urb, urb_num, str_dir(urb->pipe),
+ str_type(urb->pipe), urb->actual_length, urb->status);
+ }
+
+ /* If we just finished an active URB, clear active pointer. */
+ if (urb == activeUrbList[epid]) {
+ /* Make URB not active on EP anymore */
+ activeUrbList[epid] = NULL;
+
+ if(urb->status == 0) {
+ /* URB finished sucessfully, process queue to see if there are any more
+ URBs waiting before we call completion function.*/
+ if(crisv10_hcd->running) {
+ /* Only process queue if USB controller is running */
+ tc_dma_process_queue(epid);
+ } else {
+ tc_warn("No processing of queue for epid:%d, USB Controller not"
+ " running\n", epid);
+ }
+ }
+ }
+
+ /* Hand the URB from HCD to its USB device driver, using its completion
+ functions */
+ usb_hcd_giveback_urb (hcd, urb, status);
+
+ /* Check the queue once more if the URB returned with error, because we
+ didn't do it before the completion function because the specification
+ states that the queue should not restart until all it's unlinked
+ URBs have been fully retired, with the completion functions run */
+ if(crisv10_hcd->running) {
+ /* Only process queue if USB controller is running */
+ tc_dma_process_queue(epid);
+ } else {
+ tc_warn("No processing of queue for epid:%d, USB Controller not running\n",
+ epid);
+ }
+
+ DBFEXIT;
+}
+
+static void tc_finish_isoc_urb(struct usb_hcd *hcd, struct urb *urb,
+ int status) {
+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+ int epid, i;
+ volatile int timeout = 10000;
+ int bandwidth = 0;
+
+ ASSERT(urb_priv);
+ epid = urb_priv->epid;
+
+ ASSERT(usb_pipeisoc(urb->pipe));
+
+ /* Set that all isoc packets have status and length set before
+ completing the urb. */
+ for (i = urb_priv->isoc_packet_counter; i < urb->number_of_packets; i++){
+ urb->iso_frame_desc[i].actual_length = 0;
+ urb->iso_frame_desc[i].status = -EPROTO;
+ }
+
+ /* Check if the URB is currently active (done or error) */
+ if(urb == activeUrbList[epid]) {
+ /* Check if there are another In Isoc URB queued for this epid */
+ if (!list_empty(&urb_list[epid])&& !epid_state[epid].disabled) {
+ /* Move it from queue to active and mark it started so Isoc transfers
+ won't be interrupted.
+ All Isoc URBs data transfers are already added to DMA lists so we
+ don't have to insert anything in DMA lists here. */
+ activeUrbList[epid] = urb_list_first(epid);
+ ((struct crisv10_urb_priv *)(activeUrbList[epid]->hcpriv))->urb_state =
+ STARTED;
+ urb_list_del(activeUrbList[epid], epid);
+
+ if(urb->status) {
+ errno_dbg("finish_isoc_urb (URB:0x%x[%d] %s %s) (%d of %d packets)"
+ " status:%d, new waiting URB:0x%x[%d]\n",
+ (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+ str_type(urb->pipe), urb_priv->isoc_packet_counter,
+ urb->number_of_packets, urb->status,
+ (unsigned int)activeUrbList[epid],
+ ((struct crisv10_urb_priv *)(activeUrbList[epid]->hcpriv))->urb_num);
+ }
+
+ } else { /* No other URB queued for this epid */
+ if(urb->status) {
+ errno_dbg("finish_isoc_urb (URB:0x%x[%d] %s %s) (%d of %d packets)"
+ " status:%d, no new URB waiting\n",
+ (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+ str_type(urb->pipe), urb_priv->isoc_packet_counter,
+ urb->number_of_packets, urb->status);
+ }
+
+ /* Check if EP is still enabled, then shut it down. */
+ if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+ isoc_dbg("Isoc EP enabled for epid:%d, disabling it\n", epid);
+
+ /* Should only occur for In Isoc EPs where SB isn't consumed. */
+ ASSERT(usb_pipein(urb->pipe));
+
+ /* Disable it and wait for it to stop */
+ TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+
+ /* Ah, the luxury of busy-wait. */
+ while((*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid])) &&
+ (timeout-- > 0));
+ if(timeout == 0) {
+ warn("Timeout while waiting for DMA-TX-Isoc to leave EP for epid:%d\n", epid);
+ }
+ }
+
+ /* Unlink SB to say that epid is finished. */
+ TxIsocEPList[epid].sub = 0;
+ TxIsocEPList[epid].hw_len = 0;
+
+ /* No URB active for EP anymore */
+ activeUrbList[epid] = NULL;
+ }
+ } else { /* Finishing of not active URB (queued up with SBs thought) */
+ isoc_warn("finish_isoc_urb (URB:0x%x %s) (%d of %d packets) status:%d,"
+ " SB queued but not active\n",
+ (unsigned int)urb, str_dir(urb->pipe),
+ urb_priv->isoc_packet_counter, urb->number_of_packets,
+ urb->status);
+ if(usb_pipeout(urb->pipe)) {
+ /* Finishing of not yet active Out Isoc URB needs unlinking of SBs. */
+ struct USB_SB_Desc *iter_sb, *prev_sb, *next_sb;
+
+ iter_sb = TxIsocEPList[epid].sub ?
+ phys_to_virt(TxIsocEPList[epid].sub) : 0;
+ prev_sb = 0;
+
+ /* SB that is linked before this URBs first SB */
+ while (iter_sb && (iter_sb != urb_priv->first_sb)) {
+ prev_sb = iter_sb;
+ iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
+ }
+
+ if (iter_sb == 0) {
+ /* Unlink of the URB currently being transmitted. */
+ prev_sb = 0;
+ iter_sb = TxIsocEPList[epid].sub ? phys_to_virt(TxIsocEPList[epid].sub) : 0;
+ }
+
+ while (iter_sb && (iter_sb != urb_priv->last_sb)) {
+ iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
+ }
+
+ if (iter_sb) {
+ next_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
+ } else {
+ /* This should only happen if the DMA has completed
+ processing the SB list for this EP while interrupts
+ are disabled. */
+ isoc_dbg("Isoc urb not found, already sent?\n");
+ next_sb = 0;
+ }
+ if (prev_sb) {
+ prev_sb->next = next_sb ? virt_to_phys(next_sb) : 0;
+ } else {
+ TxIsocEPList[epid].sub = next_sb ? virt_to_phys(next_sb) : 0;
+ }
+ }
+ }
+
+ /* Free HC-private URB data*/
+ bandwidth = urb_priv->bandwidth;
+ urb_priv_free(hcd, urb);
+
+ crisv10_usb_release_bandwidth(hcd, usb_pipeisoc(urb->pipe), bandwidth);
+
+ /* Hand the URB from HCD to its USB device driver, using its completion
+ functions */
+ usb_hcd_giveback_urb (hcd, urb, status);
+}
+
+static __u32 urb_num = 0;
+
+/* allocate and initialize URB private data */
+static int urb_priv_create(struct usb_hcd *hcd, struct urb *urb, int epid,
+ int mem_flags) {
+ struct crisv10_urb_priv *urb_priv;
+
+ urb_priv = kmalloc(sizeof *urb_priv, mem_flags);
+ if (!urb_priv)
+ return -ENOMEM;
+ memset(urb_priv, 0, sizeof *urb_priv);
+
+ urb_priv->epid = epid;
+ urb_priv->urb_state = NOT_STARTED;
+
+ urb->hcpriv = urb_priv;
+ /* Assign URB a sequence number, and increment counter */
+ urb_priv->urb_num = urb_num;
+ urb_num++;
+ urb_priv->bandwidth = 0;
+ return 0;
+}
+
+/* free URB private data */
+static void urb_priv_free(struct usb_hcd *hcd, struct urb *urb) {
+ int i;
+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+ ASSERT(urb_priv != 0);
+
+ /* Check it has any SBs linked that needs to be freed*/
+ if(urb_priv->first_sb != NULL) {
+ struct USB_SB_Desc *next_sb, *first_sb, *last_sb;
+ int i = 0;
+ first_sb = urb_priv->first_sb;
+ last_sb = urb_priv->last_sb;
+ ASSERT(last_sb);
+ while(first_sb != last_sb) {
+ next_sb = (struct USB_SB_Desc *)phys_to_virt(first_sb->next);
+ kmem_cache_free(usb_desc_cache, first_sb);
+ first_sb = next_sb;
+ i++;
+ }
+ kmem_cache_free(usb_desc_cache, last_sb);
+ i++;
+ }
+
+ /* Check if it has any EPs in its Intr pool that also needs to be freed */
+ if(urb_priv->intr_ep_pool_length > 0) {
+ for(i = 0; i < urb_priv->intr_ep_pool_length; i++) {
+ kfree(urb_priv->intr_ep_pool[i]);
+ }
+ /*
+ tc_dbg("Freed %d EPs from URB:0x%x EP pool\n",
+ urb_priv->intr_ep_pool_length, (unsigned int)urb);
+ */
+ }
+
+ kfree(urb_priv);
+ urb->hcpriv = NULL;
+}
+
+static int ep_priv_create(struct usb_host_endpoint *ep, int mem_flags) {
+ struct crisv10_ep_priv *ep_priv;
+
+ ep_priv = kmalloc(sizeof *ep_priv, mem_flags);
+ if (!ep_priv)
+ return -ENOMEM;
+ memset(ep_priv, 0, sizeof *ep_priv);
+
+ ep->hcpriv = ep_priv;
+ return 0;
+}
+
+static void ep_priv_free(struct usb_host_endpoint *ep) {
+ struct crisv10_ep_priv *ep_priv = ep->hcpriv;
+ ASSERT(ep_priv);
+ kfree(ep_priv);
+ ep->hcpriv = NULL;
+}
+
+/*
+ * usb_check_bandwidth():
+ *
+ * old_alloc is from host_controller->bandwidth_allocated in microseconds;
+ * bustime is from calc_bus_time(), but converted to microseconds.
+ *
+ * returns <bustime in us> if successful,
+ * or -ENOSPC if bandwidth request fails.
+ *
+ * FIXME:
+ * This initial implementation does not use Endpoint.bInterval
+ * in managing bandwidth allocation.
+ * It probably needs to be expanded to use Endpoint.bInterval.
+ * This can be done as a later enhancement (correction).
+ *
+ * This will also probably require some kind of
+ * frame allocation tracking...meaning, for example,
+ * that if multiple drivers request interrupts every 10 USB frames,
+ * they don't all have to be allocated at
+ * frame numbers N, N+10, N+20, etc. Some of them could be at
+ * N+11, N+21, N+31, etc., and others at
+ * N+12, N+22, N+32, etc.
+ *
+ * Similarly for isochronous transfers...
+ *
+ * Individual HCDs can schedule more directly ... this logic
+ * is not correct for high speed transfers.
+ */
+static int crisv10_usb_check_bandwidth(
+ struct usb_device *dev,
+ struct urb *urb)
+{
+ unsigned int pipe = urb->pipe;
+ long bustime;
+ int is_in = usb_pipein (pipe);
+ int is_iso = usb_pipeisoc (pipe);
+ int old_alloc = dev->bus->bandwidth_allocated;
+ int new_alloc;
+
+ bustime = NS_TO_US (usb_calc_bus_time (dev->speed, is_in, is_iso,
+ usb_maxpacket (dev, pipe, !is_in)));
+ if (is_iso)
+ bustime /= urb->number_of_packets;
+
+ new_alloc = old_alloc + (int) bustime;
+ if (new_alloc > FRAME_TIME_MAX_USECS_ALLOC) {
+ dev_dbg (&dev->dev, "usb_check_bandwidth FAILED: %d + %ld = %d usec\n",
+ old_alloc, bustime, new_alloc);
+ bustime = -ENOSPC; /* report error */
+ }
+
+ return bustime;
+}
+
+/**
+ * usb_claim_bandwidth - records bandwidth for a periodic transfer
+ * @dev: source/target of request
+ * @urb: request (urb->dev == dev)
+ * @bustime: bandwidth consumed, in (average) microseconds per frame
+ * @isoc: true iff the request is isochronous
+ *
+ * HCDs are expected not to overcommit periodic bandwidth, and to record such
+ * reservations whenever endpoints are added to the periodic schedule.
+ *
+ * FIXME averaging per-frame is suboptimal. Better to sum over the HCD's
+ * entire periodic schedule ... 32 frames for OHCI, 1024 for UHCI, settable
+ * for EHCI (256/512/1024 frames, default 1024) and have the bus expose how
+ * large its periodic schedule is.
+ */
+static void crisv10_usb_claim_bandwidth(
+ struct usb_device *dev,
+ struct urb *urb, int bustime, int isoc)
+{
+ dev->bus->bandwidth_allocated += bustime;
+ if (isoc)
+ dev->bus->bandwidth_isoc_reqs++;
+ else
+ dev->bus->bandwidth_int_reqs++;
+ struct crisv10_urb_priv *urb_priv;
+ urb_priv = urb->hcpriv;
+ urb_priv->bandwidth = bustime;
+}
+
+/**
+ * usb_release_bandwidth - reverses effect of usb_claim_bandwidth()
+ * @hcd: host controller
+ * @isoc: true iff the request is isochronous
+ * @bandwidth: bandwidth returned
+ *
+ * This records that previously allocated bandwidth has been released.
+ * Bandwidth is released when endpoints are removed from the host controller's
+ * periodic schedule.
+ */
+static void crisv10_usb_release_bandwidth(
+ struct usb_hcd *hcd,
+ int isoc,
+ int bandwidth)
+{
+ hcd_to_bus(hcd)->bandwidth_allocated -= bandwidth;
+ if (isoc)
+ hcd_to_bus(hcd)->bandwidth_isoc_reqs--;
+ else
+ hcd_to_bus(hcd)->bandwidth_int_reqs--;
+}
+
+
+/* EPID handling functions, managing EP-list in Etrax through wrappers */
+/* ------------------------------------------------------------------- */
+
+/* Sets up a new EPID for an endpoint or returns existing if found */
+static int tc_setup_epid(struct usb_host_endpoint *ep, struct urb *urb,
+ int mem_flags) {
+ int epid;
+ char devnum, endpoint, out_traffic, slow;
+ int maxlen;
+ __u32 epid_data;
+ struct crisv10_ep_priv *ep_priv = ep->hcpriv;
+
+ DBFENTER;
+
+ /* Check if a valid epid already is setup for this endpoint */
+ if(ep_priv != NULL) {
+ return ep_priv->epid;
+ }
+
+ /* We must find and initiate a new epid for this urb. */
+ epid = tc_allocate_epid();
+
+ if (epid == -1) {
+ /* Failed to allocate a new epid. */
+ DBFEXIT;
+ return epid;
+ }
+
+ /* We now have a new epid to use. Claim it. */
+ epid_state[epid].inuse = 1;
+
+ /* Init private data for new endpoint */
+ if(ep_priv_create(ep, mem_flags) != 0) {
+ return -ENOMEM;
+ }
+ ep_priv = ep->hcpriv;
+ ep_priv->epid = epid;
+
+ devnum = usb_pipedevice(urb->pipe);
+ endpoint = usb_pipeendpoint(urb->pipe);
+ slow = (urb->dev->speed == USB_SPEED_LOW);
+ maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
+
+ if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
+ /* We want both IN and OUT control traffic to be put on the same
+ EP/SB list. */
+ out_traffic = 1;
+ } else {
+ out_traffic = usb_pipeout(urb->pipe);
+ }
+
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+ epid_data = IO_STATE(R_USB_EPT_DATA_ISO, valid, yes) |
+ /* FIXME: Change any to the actual port? */
+ IO_STATE(R_USB_EPT_DATA_ISO, port, any) |
+ IO_FIELD(R_USB_EPT_DATA_ISO, max_len, maxlen) |
+ IO_FIELD(R_USB_EPT_DATA_ISO, ep, endpoint) |
+ IO_FIELD(R_USB_EPT_DATA_ISO, dev, devnum);
+ etrax_epid_iso_set(epid, epid_data);
+ } else {
+ epid_data = IO_STATE(R_USB_EPT_DATA, valid, yes) |
+ IO_FIELD(R_USB_EPT_DATA, low_speed, slow) |
+ /* FIXME: Change any to the actual port? */
+ IO_STATE(R_USB_EPT_DATA, port, any) |
+ IO_FIELD(R_USB_EPT_DATA, max_len, maxlen) |
+ IO_FIELD(R_USB_EPT_DATA, ep, endpoint) |
+ IO_FIELD(R_USB_EPT_DATA, dev, devnum);
+ etrax_epid_set(epid, epid_data);
+ }
+
+ epid_state[epid].out_traffic = out_traffic;
+ epid_state[epid].type = usb_pipetype(urb->pipe);
+
+ tc_warn("Setting up ep:0x%x epid:%d (addr:%d endp:%d max_len:%d %s %s %s)\n",
+ (unsigned int)ep, epid, devnum, endpoint, maxlen,
+ str_type(urb->pipe), out_traffic ? "out" : "in",
+ slow ? "low" : "full");
+
+ /* Enable Isoc eof interrupt if we set up the first Isoc epid */
+ if(usb_pipeisoc(urb->pipe)) {
+ isoc_epid_counter++;
+ if(isoc_epid_counter == 1) {
+ isoc_warn("Enabled Isoc eof interrupt\n");
+ *R_USB_IRQ_MASK_SET = IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set);
+ }
+ }
+
+ DBFEXIT;
+ return epid;
+}
+
+static void tc_free_epid(struct usb_host_endpoint *ep) {
+ unsigned long flags;
+ struct crisv10_ep_priv *ep_priv = ep->hcpriv;
+ int epid;
+ volatile int timeout = 10000;
+
+ DBFENTER;
+
+ if (ep_priv == NULL) {
+ tc_warn("Trying to free unused epid on ep:0x%x\n", (unsigned int)ep);
+ DBFEXIT;
+ return;
+ }
+
+ epid = ep_priv->epid;
+
+ /* Disable Isoc eof interrupt if we free the last Isoc epid */
+ if(epid_isoc(epid)) {
+ ASSERT(isoc_epid_counter > 0);
+ isoc_epid_counter--;
+ if(isoc_epid_counter == 0) {
+ *R_USB_IRQ_MASK_CLR = IO_STATE(R_USB_IRQ_MASK_CLR, iso_eof, clr);
+ isoc_warn("Disabled Isoc eof interrupt\n");
+ }
+ }
+
+ /* Take lock manualy instead of in epid_x_x wrappers,
+ because we need to be polling here */
+ spin_lock_irqsave(&etrax_epid_lock, flags);
+
+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
+ nop();
+ while((*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)) &&
+ (timeout-- > 0));
+ if(timeout == 0) {
+ warn("Timeout while waiting for epid:%d to drop hold\n", epid);
+ }
+ /* This will, among other things, set the valid field to 0. */
+ *R_USB_EPT_DATA = 0;
+ spin_unlock_irqrestore(&etrax_epid_lock, flags);
+
+ /* Free resource in software state info list */
+ epid_state[epid].inuse = 0;
+
+ /* Free private endpoint data */
+ ep_priv_free(ep);
+
+ DBFEXIT;
+}
+
+static int tc_allocate_epid(void) {
+ int i;
+ DBFENTER;
+ for (i = 0; i < NBR_OF_EPIDS; i++) {
+ if (!epid_inuse(i)) {
+ DBFEXIT;
+ return i;
+ }
+ }
+
+ tc_warn("Found no free epids\n");
+ DBFEXIT;
+ return -1;
+}
+
+
+/* Wrappers around the list functions (include/linux/list.h). */
+/* ---------------------------------------------------------- */
+static inline int __urb_list_empty(int epid) {
+ int retval;
+ retval = list_empty(&urb_list[epid]);
+ return retval;
+}
+
+/* Returns first urb for this epid, or NULL if list is empty. */
+static inline struct urb *urb_list_first(int epid) {
+ unsigned long flags;
+ struct urb *first_urb = 0;
+ spin_lock_irqsave(&urb_list_lock, flags);
+ if (!__urb_list_empty(epid)) {
+ /* Get the first urb (i.e. head->next). */
+ urb_entry_t *urb_entry = list_entry((&urb_list[epid])->next, urb_entry_t, list);
+ first_urb = urb_entry->urb;
+ }
+ spin_unlock_irqrestore(&urb_list_lock, flags);
+ return first_urb;
+}
+
+/* Adds an urb_entry last in the list for this epid. */
+static inline void urb_list_add(struct urb *urb, int epid, int mem_flags) {
+ unsigned long flags;
+ urb_entry_t *urb_entry = (urb_entry_t *)kmalloc(sizeof(urb_entry_t), mem_flags);
+ ASSERT(urb_entry);
+
+ urb_entry->urb = urb;
+ spin_lock_irqsave(&urb_list_lock, flags);
+ list_add_tail(&urb_entry->list, &urb_list[epid]);
+ spin_unlock_irqrestore(&urb_list_lock, flags);
+}
+
+/* Search through the list for an element that contains this urb. (The list
+ is expected to be short and the one we are about to delete will often be
+ the first in the list.)
+ Should be protected by spin_locks in calling function */
+static inline urb_entry_t *__urb_list_entry(struct urb *urb, int epid) {
+ struct list_head *entry;
+ struct list_head *tmp;
+ urb_entry_t *urb_entry;
+
+ list_for_each_safe(entry, tmp, &urb_list[epid]) {
+ urb_entry = list_entry(entry, urb_entry_t, list);
+ ASSERT(urb_entry);
+ ASSERT(urb_entry->urb);
+
+ if (urb_entry->urb == urb) {
+ return urb_entry;
+ }
+ }
+ return 0;
+}
+
+/* Same function as above but for global use. Protects list by spinlock */
+static inline urb_entry_t *urb_list_entry(struct urb *urb, int epid) {
+ unsigned long flags;
+ urb_entry_t *urb_entry;
+ spin_lock_irqsave(&urb_list_lock, flags);
+ urb_entry = __urb_list_entry(urb, epid);
+ spin_unlock_irqrestore(&urb_list_lock, flags);
+ return (urb_entry);
+}
+
+/* Delete an urb from the list. */
+static inline void urb_list_del(struct urb *urb, int epid) {
+ unsigned long flags;
+ urb_entry_t *urb_entry;
+
+ /* Delete entry and free. */
+ spin_lock_irqsave(&urb_list_lock, flags);
+ urb_entry = __urb_list_entry(urb, epid);
+ ASSERT(urb_entry);
+
+ list_del(&urb_entry->list);
+ spin_unlock_irqrestore(&urb_list_lock, flags);
+ kfree(urb_entry);
+}
+
+/* Move an urb to the end of the list. */
+static inline void urb_list_move_last(struct urb *urb, int epid) {
+ unsigned long flags;
+ urb_entry_t *urb_entry;
+
+ spin_lock_irqsave(&urb_list_lock, flags);
+ urb_entry = __urb_list_entry(urb, epid);
+ ASSERT(urb_entry);
+
+ list_del(&urb_entry->list);
+ list_add_tail(&urb_entry->list, &urb_list[epid]);
+ spin_unlock_irqrestore(&urb_list_lock, flags);
+}
+
+/* Get the next urb in the list. */
+static inline struct urb *urb_list_next(struct urb *urb, int epid) {
+ unsigned long flags;
+ urb_entry_t *urb_entry;
+
+ spin_lock_irqsave(&urb_list_lock, flags);
+ urb_entry = __urb_list_entry(urb, epid);
+ ASSERT(urb_entry);
+
+ if (urb_entry->list.next != &urb_list[epid]) {
+ struct list_head *elem = urb_entry->list.next;
+ urb_entry = list_entry(elem, urb_entry_t, list);
+ spin_unlock_irqrestore(&urb_list_lock, flags);
+ return urb_entry->urb;
+ } else {
+ spin_unlock_irqrestore(&urb_list_lock, flags);
+ return NULL;
+ }
+}
+
+struct USB_EP_Desc* create_ep(int epid, struct USB_SB_Desc* sb_desc,
+ int mem_flags) {
+ struct USB_EP_Desc *ep_desc;
+ ep_desc = (struct USB_EP_Desc *) kmem_cache_alloc(usb_desc_cache, mem_flags);
+ if(ep_desc == NULL)
+ return NULL;
+ memset(ep_desc, 0, sizeof(struct USB_EP_Desc));
+
+ ep_desc->hw_len = 0;
+ ep_desc->command = (IO_FIELD(USB_EP_command, epid, epid) |
+ IO_STATE(USB_EP_command, enable, yes));
+ if(sb_desc == NULL) {
+ ep_desc->sub = 0;
+ } else {
+ ep_desc->sub = virt_to_phys(sb_desc);
+ }
+ return ep_desc;
+}
+
+#define TT_ZOUT 0
+#define TT_IN 1
+#define TT_OUT 2
+#define TT_SETUP 3
+
+#define CMD_EOL IO_STATE(USB_SB_command, eol, yes)
+#define CMD_INTR IO_STATE(USB_SB_command, intr, yes)
+#define CMD_FULL IO_STATE(USB_SB_command, full, yes)
+
+/* Allocation and setup of a generic SB. Used to create SETUP, OUT and ZOUT
+ SBs. Also used by create_sb_in() to avoid same allocation procedure at two
+ places */
+struct USB_SB_Desc* create_sb(struct USB_SB_Desc* sb_prev, int tt, void* data,
+ int datalen, int mem_flags) {
+ struct USB_SB_Desc *sb_desc;
+ sb_desc = (struct USB_SB_Desc*)kmem_cache_alloc(usb_desc_cache, mem_flags);
+ if(sb_desc == NULL)
+ return NULL;
+ memset(sb_desc, 0, sizeof(struct USB_SB_Desc));
+
+ sb_desc->command = IO_FIELD(USB_SB_command, tt, tt) |
+ IO_STATE(USB_SB_command, eot, yes);
+
+ sb_desc->sw_len = datalen;
+ if(data != NULL) {
+ sb_desc->buf = virt_to_phys(data);
+ } else {
+ sb_desc->buf = 0;
+ }
+ if(sb_prev != NULL) {
+ sb_prev->next = virt_to_phys(sb_desc);
+ }
+ return sb_desc;
+}
+
+/* Creates a copy of an existing SB by allocation space for it and copy
+ settings */
+struct USB_SB_Desc* create_sb_copy(struct USB_SB_Desc* sb_orig, int mem_flags) {
+ struct USB_SB_Desc *sb_desc;
+ sb_desc = (struct USB_SB_Desc*)kmem_cache_alloc(usb_desc_cache, mem_flags);
+ if(sb_desc == NULL)
+ return NULL;
+
+ memcpy(sb_desc, sb_orig, sizeof(struct USB_SB_Desc));
+ return sb_desc;
+}
+
+/* A specific create_sb function for creation of in SBs. This is due to
+ that datalen in In SBs shows how many packets we are expecting. It also
+ sets up the rem field to show if how many bytes we expect in last packet
+ if it's not a full one */
+struct USB_SB_Desc* create_sb_in(struct USB_SB_Desc* sb_prev, int datalen,
+ int maxlen, int mem_flags) {
+ struct USB_SB_Desc *sb_desc;
+ sb_desc = create_sb(sb_prev, TT_IN, NULL,
+ datalen ? (datalen - 1) / maxlen + 1 : 0, mem_flags);
+ if(sb_desc == NULL)
+ return NULL;
+ sb_desc->command |= IO_FIELD(USB_SB_command, rem, datalen % maxlen);
+ return sb_desc;
+}
+
+void set_sb_cmds(struct USB_SB_Desc *sb_desc, __u16 flags) {
+ sb_desc->command |= flags;
+}
+
+int create_sb_for_urb(struct urb *urb, int mem_flags) {
+ int is_out = !usb_pipein(urb->pipe);
+ int type = usb_pipetype(urb->pipe);
+ int maxlen = usb_maxpacket(urb->dev, urb->pipe, is_out);
+ int buf_len = urb->transfer_buffer_length;
+ void *buf = buf_len > 0 ? urb->transfer_buffer : NULL;
+ struct USB_SB_Desc *sb_desc = NULL;
+
+ struct crisv10_urb_priv *urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+ ASSERT(urb_priv != NULL);
+
+ switch(type) {
+ case PIPE_CONTROL:
+ /* Setup stage */
+ sb_desc = create_sb(NULL, TT_SETUP, urb->setup_packet, 8, mem_flags);
+ if(sb_desc == NULL)
+ return -ENOMEM;
+ set_sb_cmds(sb_desc, CMD_FULL);
+
+ /* Attach first SB to URB */
+ urb_priv->first_sb = sb_desc;
+
+ if (is_out) { /* Out Control URB */
+ /* If this Control OUT transfer has an optional data stage we add
+ an OUT token before the mandatory IN (status) token */
+ if ((buf_len > 0) && buf) {
+ sb_desc = create_sb(sb_desc, TT_OUT, buf, buf_len, mem_flags);
+ if(sb_desc == NULL)
+ return -ENOMEM;
+ set_sb_cmds(sb_desc, CMD_FULL);
+ }
+
+ /* Status stage */
+ /* The data length has to be exactly 1. This is due to a requirement
+ of the USB specification that a host must be prepared to receive
+ data in the status phase */
+ sb_desc = create_sb(sb_desc, TT_IN, NULL, 1, mem_flags);
+ if(sb_desc == NULL)
+ return -ENOMEM;
+ } else { /* In control URB */
+ /* Data stage */
+ sb_desc = create_sb_in(sb_desc, buf_len, maxlen, mem_flags);
+ if(sb_desc == NULL)
+ return -ENOMEM;
+
+ /* Status stage */
+ /* Read comment at zout_buffer declaration for an explanation to this. */
+ sb_desc = create_sb(sb_desc, TT_ZOUT, &zout_buffer[0], 1, mem_flags);
+ if(sb_desc == NULL)
+ return -ENOMEM;
+ /* Set descriptor interrupt flag for in URBs so we can finish URB after
+ zout-packet has been sent */
+ set_sb_cmds(sb_desc, CMD_INTR | CMD_FULL);
+ }
+ /* Set end-of-list flag in last SB */
+ set_sb_cmds(sb_desc, CMD_EOL);
+ /* Attach last SB to URB */
+ urb_priv->last_sb = sb_desc;
+ break;
+
+ case PIPE_BULK:
+ if (is_out) { /* Out Bulk URB */
+ sb_desc = create_sb(NULL, TT_OUT, buf, buf_len, mem_flags);
+ if(sb_desc == NULL)
+ return -ENOMEM;
+ /* The full field is set to yes, even if we don't actually check that
+ this is a full-length transfer (i.e., that transfer_buffer_length %
+ maxlen = 0).
+ Setting full prevents the USB controller from sending an empty packet
+ in that case. However, if URB_ZERO_PACKET was set we want that. */
+ if (!(urb->transfer_flags & URB_ZERO_PACKET)) {
+ set_sb_cmds(sb_desc, CMD_FULL);
+ }
+ } else { /* In Bulk URB */
+ sb_desc = create_sb_in(NULL, buf_len, maxlen, mem_flags);
+ if(sb_desc == NULL)
+ return -ENOMEM;
+ }
+ /* Set end-of-list flag for last SB */
+ set_sb_cmds(sb_desc, CMD_EOL);
+
+ /* Attach SB to URB */
+ urb_priv->first_sb = sb_desc;
+ urb_priv->last_sb = sb_desc;
+ break;
+
+ case PIPE_INTERRUPT:
+ if(is_out) { /* Out Intr URB */
+ sb_desc = create_sb(NULL, TT_OUT, buf, buf_len, mem_flags);
+ if(sb_desc == NULL)
+ return -ENOMEM;
+
+ /* The full field is set to yes, even if we don't actually check that
+ this is a full-length transfer (i.e., that transfer_buffer_length %
+ maxlen = 0).
+ Setting full prevents the USB controller from sending an empty packet
+ in that case. However, if URB_ZERO_PACKET was set we want that. */
+ if (!(urb->transfer_flags & URB_ZERO_PACKET)) {
+ set_sb_cmds(sb_desc, CMD_FULL);
+ }
+ /* Only generate TX interrupt if it's a Out URB*/
+ set_sb_cmds(sb_desc, CMD_INTR);
+
+ } else { /* In Intr URB */
+ sb_desc = create_sb_in(NULL, buf_len, maxlen, mem_flags);
+ if(sb_desc == NULL)
+ return -ENOMEM;
+ }
+ /* Set end-of-list flag for last SB */
+ set_sb_cmds(sb_desc, CMD_EOL);
+
+ /* Attach SB to URB */
+ urb_priv->first_sb = sb_desc;
+ urb_priv->last_sb = sb_desc;
+
+ break;
+ case PIPE_ISOCHRONOUS:
+ if(is_out) { /* Out Isoc URB */
+ int i;
+ if(urb->number_of_packets == 0) {
+ tc_err("Can't create SBs for Isoc URB with zero packets\n");
+ return -EPIPE;
+ }
+ /* Create one SB descriptor for each packet and link them together. */
+ for(i = 0; i < urb->number_of_packets; i++) {
+ if (urb->iso_frame_desc[i].length > 0) {
+
+ sb_desc = create_sb(sb_desc, TT_OUT, urb->transfer_buffer +
+ urb->iso_frame_desc[i].offset,
+ urb->iso_frame_desc[i].length, mem_flags);
+ if(sb_desc == NULL)
+ return -ENOMEM;
+
+ /* Check if it's a full length packet */
+ if (urb->iso_frame_desc[i].length ==
+ usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))) {
+ set_sb_cmds(sb_desc, CMD_FULL);
+ }
+
+ } else { /* zero length packet */
+ sb_desc = create_sb(sb_desc, TT_ZOUT, &zout_buffer[0], 1, mem_flags);
+ if(sb_desc == NULL)
+ return -ENOMEM;
+ set_sb_cmds(sb_desc, CMD_FULL);
+ }
+ /* Attach first SB descriptor to URB */
+ if (i == 0) {
+ urb_priv->first_sb = sb_desc;
+ }
+ }
+ /* Set interrupt and end-of-list flags in last SB */
+ set_sb_cmds(sb_desc, CMD_INTR | CMD_EOL);
+ /* Attach last SB descriptor to URB */
+ urb_priv->last_sb = sb_desc;
+ tc_dbg("Created %d out SBs for Isoc URB:0x%x\n",
+ urb->number_of_packets, (unsigned int)urb);
+ } else { /* In Isoc URB */
+ /* Actual number of packets is not relevant for periodic in traffic as
+ long as it is more than zero. Set to 1 always. */
+ sb_desc = create_sb(sb_desc, TT_IN, NULL, 1, mem_flags);
+ if(sb_desc == NULL)
+ return -ENOMEM;
+ /* Set end-of-list flags for SB */
+ set_sb_cmds(sb_desc, CMD_EOL);
+
+ /* Attach SB to URB */
+ urb_priv->first_sb = sb_desc;
+ urb_priv->last_sb = sb_desc;
+ }
+ break;
+ default:
+ tc_err("Unknown pipe-type\n");
+ return -EPIPE;
+ break;
+ }
+ return 0;
+}
+
+int init_intr_urb(struct urb *urb, int mem_flags) {
+ struct crisv10_urb_priv *urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+ struct USB_EP_Desc* ep_desc;
+ int interval;
+ int i;
+ int ep_count;
+
+ ASSERT(urb_priv != NULL);
+ ASSERT(usb_pipeint(urb->pipe));
+ /* We can't support interval longer than amount of eof descriptors in
+ TxIntrEPList */
+ if(urb->interval > MAX_INTR_INTERVAL) {
+ tc_err("Interrupt interval %dms too big (max: %dms)\n", urb->interval,
+ MAX_INTR_INTERVAL);
+ return -EINVAL;
+ }
+
+ /* We assume that the SB descriptors already have been setup */
+ ASSERT(urb_priv->first_sb != NULL);
+
+ /* Round of the interval to 2^n, it is obvious that this code favours
+ smaller numbers, but that is actually a good thing */
+ /* FIXME: The "rounding error" for larger intervals will be quite
+ large. For in traffic this shouldn't be a problem since it will only
+ mean that we "poll" more often. */
+ interval = urb->interval;
+ for (i = 0; interval; i++) {
+ interval = interval >> 1;
+ }
+ urb_priv->interval = 1 << (i - 1);
+
+ /* We can only have max interval for Out Interrupt due to that we can only
+ handle one linked in EP for a certain epid in the Intr descr array at the
+ time. The USB Controller in the Etrax 100LX continues to process Intr EPs
+ so we have no way of knowing which one that caused the actual transfer if
+ we have several linked in. */
+ if(usb_pipeout(urb->pipe)) {
+ urb_priv->interval = MAX_INTR_INTERVAL;
+ }
+
+ /* Calculate amount of EPs needed */
+ ep_count = MAX_INTR_INTERVAL / urb_priv->interval;
+
+ for(i = 0; i < ep_count; i++) {
+ ep_desc = create_ep(urb_priv->epid, urb_priv->first_sb, mem_flags);
+ if(ep_desc == NULL) {
+ /* Free any descriptors that we may have allocated before failure */
+ while(i > 0) {
+ i--;
+ kfree(urb_priv->intr_ep_pool[i]);
+ }
+ return -ENOMEM;
+ }
+ urb_priv->intr_ep_pool[i] = ep_desc;
+ }
+ urb_priv->intr_ep_pool_length = ep_count;
+ return 0;
+}
+
+/* DMA RX/TX functions */
+/* ----------------------- */
+
+static void tc_dma_init_rx_list(void) {
+ int i;
+
+ /* Setup descriptor list except last one */
+ for (i = 0; i < (NBR_OF_RX_DESC - 1); i++) {
+ RxDescList[i].sw_len = RX_DESC_BUF_SIZE;
+ RxDescList[i].command = 0;
+ RxDescList[i].next = virt_to_phys(&RxDescList[i + 1]);
+ RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE));
+ RxDescList[i].hw_len = 0;
+ RxDescList[i].status = 0;
+
+ /* DMA IN cache bug. (struct etrax_dma_descr has the same layout as
+ USB_IN_Desc for the relevant fields.) */
+ prepare_rx_descriptor((struct etrax_dma_descr*)&RxDescList[i]);
+
+ }
+ /* Special handling of last descriptor */
+ RxDescList[i].sw_len = RX_DESC_BUF_SIZE;
+ RxDescList[i].command = IO_STATE(USB_IN_command, eol, yes);
+ RxDescList[i].next = virt_to_phys(&RxDescList[0]);
+ RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE));
+ RxDescList[i].hw_len = 0;
+ RxDescList[i].status = 0;
+
+ /* Setup list pointers that show progress in list */
+ myNextRxDesc = &RxDescList[0];
+ myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1];
+
+ flush_etrax_cache();
+ /* Point DMA to first descriptor in list and start it */
+ *R_DMA_CH9_FIRST = virt_to_phys(myNextRxDesc);
+ *R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, start);
+}
+
+
+static void tc_dma_init_tx_bulk_list(void) {
+ int i;
+ volatile struct USB_EP_Desc *epDescr;
+
+ for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
+ epDescr = &(TxBulkEPList[i]);
+ CHECK_ALIGN(epDescr);
+ epDescr->hw_len = 0;
+ epDescr->command = IO_FIELD(USB_EP_command, epid, i);
+ epDescr->sub = 0;
+ epDescr->next = virt_to_phys(&TxBulkEPList[i + 1]);
+
+ /* Initiate two EPs, disabled and with the eol flag set. No need for any
+ preserved epid. */
+
+ /* The first one has the intr flag set so we get an interrupt when the DMA
+ channel is about to become disabled. */
+ CHECK_ALIGN(&TxBulkDummyEPList[i][0]);
+ TxBulkDummyEPList[i][0].hw_len = 0;
+ TxBulkDummyEPList[i][0].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) |
+ IO_STATE(USB_EP_command, eol, yes) |
+ IO_STATE(USB_EP_command, intr, yes));
+ TxBulkDummyEPList[i][0].sub = 0;
+ TxBulkDummyEPList[i][0].next = virt_to_phys(&TxBulkDummyEPList[i][1]);
+
+ /* The second one. */
+ CHECK_ALIGN(&TxBulkDummyEPList[i][1]);
+ TxBulkDummyEPList[i][1].hw_len = 0;
+ TxBulkDummyEPList[i][1].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) |
+ IO_STATE(USB_EP_command, eol, yes));
+ TxBulkDummyEPList[i][1].sub = 0;
+ /* The last dummy's next pointer is the same as the current EP's next pointer. */
+ TxBulkDummyEPList[i][1].next = virt_to_phys(&TxBulkEPList[i + 1]);
+ }
+
+ /* Special handling of last descr in list, make list circular */
+ epDescr = &TxBulkEPList[i];
+ CHECK_ALIGN(epDescr);
+ epDescr->hw_len = 0;
+ epDescr->command = IO_STATE(USB_EP_command, eol, yes) |
+ IO_FIELD(USB_EP_command, epid, i);
+ epDescr->sub = 0;
+ epDescr->next = virt_to_phys(&TxBulkEPList[0]);
+
+ /* Init DMA sub-channel pointers to last item in each list */
+ *R_DMA_CH8_SUB0_EP = virt_to_phys(&TxBulkEPList[i]);
+ /* No point in starting the bulk channel yet.
+ *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); */
+}
+
+static void tc_dma_init_tx_ctrl_list(void) {
+ int i;
+ volatile struct USB_EP_Desc *epDescr;
+
+ for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
+ epDescr = &(TxCtrlEPList[i]);
+ CHECK_ALIGN(epDescr);
+ epDescr->hw_len = 0;
+ epDescr->command = IO_FIELD(USB_EP_command, epid, i);
+ epDescr->sub = 0;
+ epDescr->next = virt_to_phys(&TxCtrlEPList[i + 1]);
+ }
+ /* Special handling of last descr in list, make list circular */
+ epDescr = &TxCtrlEPList[i];
+ CHECK_ALIGN(epDescr);
+ epDescr->hw_len = 0;
+ epDescr->command = IO_STATE(USB_EP_command, eol, yes) |
+ IO_FIELD(USB_EP_command, epid, i);
+ epDescr->sub = 0;
+ epDescr->next = virt_to_phys(&TxCtrlEPList[0]);
+
+ /* Init DMA sub-channel pointers to last item in each list */
+ *R_DMA_CH8_SUB1_EP = virt_to_phys(&TxCtrlEPList[i]);
+ /* No point in starting the ctrl channel yet.
+ *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); */
+}
+
+
+static void tc_dma_init_tx_intr_list(void) {
+ int i;
+
+ TxIntrSB_zout.sw_len = 1;
+ TxIntrSB_zout.next = 0;
+ TxIntrSB_zout.buf = virt_to_phys(&zout_buffer[0]);
+ TxIntrSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) |
+ IO_STATE(USB_SB_command, tt, zout) |
+ IO_STATE(USB_SB_command, full, yes) |
+ IO_STATE(USB_SB_command, eot, yes) |
+ IO_STATE(USB_SB_command, eol, yes));
+
+ for (i = 0; i < (MAX_INTR_INTERVAL - 1); i++) {
+ CHECK_ALIGN(&TxIntrEPList[i]);
+ TxIntrEPList[i].hw_len = 0;
+ TxIntrEPList[i].command =
+ (IO_STATE(USB_EP_command, eof, yes) |
+ IO_STATE(USB_EP_command, enable, yes) |
+ IO_FIELD(USB_EP_command, epid, INVALID_EPID));
+ TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout);
+ TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[i + 1]);
+ }
+
+ /* Special handling of last descr in list, make list circular */
+ CHECK_ALIGN(&TxIntrEPList[i]);
+ TxIntrEPList[i].hw_len = 0;
+ TxIntrEPList[i].command =
+ (IO_STATE(USB_EP_command, eof, yes) |
+ IO_STATE(USB_EP_command, eol, yes) |
+ IO_STATE(USB_EP_command, enable, yes) |
+ IO_FIELD(USB_EP_command, epid, INVALID_EPID));
+ TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout);
+ TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[0]);
+
+ intr_dbg("Initiated Intr EP descriptor list\n");
+
+
+ /* Connect DMA 8 sub-channel 2 to first in list */
+ *R_DMA_CH8_SUB2_EP = virt_to_phys(&TxIntrEPList[0]);
+}
+
+static void tc_dma_init_tx_isoc_list(void) {
+ int i;
+
+ DBFENTER;
+
+ /* Read comment at zout_buffer declaration for an explanation to this. */
+ TxIsocSB_zout.sw_len = 1;
+ TxIsocSB_zout.next = 0;
+ TxIsocSB_zout.buf = virt_to_phys(&zout_buffer[0]);
+ TxIsocSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) |
+ IO_STATE(USB_SB_command, tt, zout) |
+ IO_STATE(USB_SB_command, full, yes) |
+ IO_STATE(USB_SB_command, eot, yes) |
+ IO_STATE(USB_SB_command, eol, yes));
+
+ /* The last isochronous EP descriptor is a dummy. */
+ for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
+ CHECK_ALIGN(&TxIsocEPList[i]);
+ TxIsocEPList[i].hw_len = 0;
+ TxIsocEPList[i].command = IO_FIELD(USB_EP_command, epid, i);
+ TxIsocEPList[i].sub = 0;
+ TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[i + 1]);
+ }
+
+ CHECK_ALIGN(&TxIsocEPList[i]);
+ TxIsocEPList[i].hw_len = 0;
+
+ /* Must enable the last EP descr to get eof interrupt. */
+ TxIsocEPList[i].command = (IO_STATE(USB_EP_command, enable, yes) |
+ IO_STATE(USB_EP_command, eof, yes) |
+ IO_STATE(USB_EP_command, eol, yes) |
+ IO_FIELD(USB_EP_command, epid, INVALID_EPID));
+ TxIsocEPList[i].sub = virt_to_phys(&TxIsocSB_zout);
+ TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[0]);
+
+ *R_DMA_CH8_SUB3_EP = virt_to_phys(&TxIsocEPList[0]);
+ *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start);
+}
+
+static int tc_dma_init(struct usb_hcd *hcd) {
+ tc_dma_init_rx_list();
+ tc_dma_init_tx_bulk_list();
+ tc_dma_init_tx_ctrl_list();
+ tc_dma_init_tx_intr_list();
+ tc_dma_init_tx_isoc_list();
+
+ if (cris_request_dma(USB_TX_DMA_NBR,
+ "ETRAX 100LX built-in USB (Tx)",
+ DMA_VERBOSE_ON_ERROR,
+ dma_usb)) {
+ err("Could not allocate DMA ch 8 for USB");
+ return -EBUSY;
+ }
+
+ if (cris_request_dma(USB_RX_DMA_NBR,
+ "ETRAX 100LX built-in USB (Rx)",
+ DMA_VERBOSE_ON_ERROR,
+ dma_usb)) {
+ err("Could not allocate DMA ch 9 for USB");
+ return -EBUSY;
+ }
+
+ *R_IRQ_MASK2_SET =
+ /* Note that these interrupts are not used. */
+ IO_STATE(R_IRQ_MASK2_SET, dma8_sub0_descr, set) |
+ /* Sub channel 1 (ctrl) descr. interrupts are used. */
+ IO_STATE(R_IRQ_MASK2_SET, dma8_sub1_descr, set) |
+ IO_STATE(R_IRQ_MASK2_SET, dma8_sub2_descr, set) |
+ /* Sub channel 3 (isoc) descr. interrupts are used. */
+ IO_STATE(R_IRQ_MASK2_SET, dma8_sub3_descr, set);
+
+ /* Note that the dma9_descr interrupt is not used. */
+ *R_IRQ_MASK2_SET =
+ IO_STATE(R_IRQ_MASK2_SET, dma9_eop, set) |
+ IO_STATE(R_IRQ_MASK2_SET, dma9_descr, set);
+
+ if (request_irq(ETRAX_USB_RX_IRQ, tc_dma_rx_interrupt, 0,
+ "ETRAX 100LX built-in USB (Rx)", hcd)) {
+ err("Could not allocate IRQ %d for USB", ETRAX_USB_RX_IRQ);
+ return -EBUSY;
+ }
+
+ if (request_irq(ETRAX_USB_TX_IRQ, tc_dma_tx_interrupt, 0,
+ "ETRAX 100LX built-in USB (Tx)", hcd)) {
+ err("Could not allocate IRQ %d for USB", ETRAX_USB_TX_IRQ);
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+static void tc_dma_destroy(void) {
+ free_irq(ETRAX_USB_RX_IRQ, NULL);
+ free_irq(ETRAX_USB_TX_IRQ, NULL);
+
+ cris_free_dma(USB_TX_DMA_NBR, "ETRAX 100LX built-in USB (Tx)");
+ cris_free_dma(USB_RX_DMA_NBR, "ETRAX 100LX built-in USB (Rx)");
+
+}
+
+static void tc_dma_link_intr_urb(struct urb *urb);
+
+/* Handle processing of Bulk, Ctrl and Intr queues */
+static void tc_dma_process_queue(int epid) {
+ struct urb *urb;
+ struct crisv10_urb_priv *urb_priv;
+ unsigned long flags;
+ char toggle;
+
+ if(epid_state[epid].disabled) {
+ /* Don't process any URBs on a disabled endpoint */
+ return;
+ }
+
+ /* Do not disturb us while fiddling with EPs and epids */
+ local_irq_save(flags);
+
+ /* For bulk, Ctrl and Intr can we only have one URB active at a time for
+ a specific EP. */
+ if(activeUrbList[epid] != NULL) {
+ /* An URB is already active on EP, skip checking queue */
+ local_irq_restore(flags);
+ return;
+ }
+
+ urb = urb_list_first(epid);
+ if(urb == NULL) {
+ /* No URB waiting in EP queue. Nothing do to */
+ local_irq_restore(flags);
+ return;
+ }
+
+ urb_priv = urb->hcpriv;
+ ASSERT(urb_priv != NULL);
+ ASSERT(urb_priv->urb_state == NOT_STARTED);
+ ASSERT(!usb_pipeisoc(urb->pipe));
+
+ /* Remove this URB from the queue and move it to active */
+ activeUrbList[epid] = urb;
+ urb_list_del(urb, epid);
+
+ urb_priv->urb_state = STARTED;
+
+ /* Reset error counters (regardless of which direction this traffic is). */
+ etrax_epid_clear_error(epid);
+
+ /* Special handling of Intr EP lists */
+ if(usb_pipeint(urb->pipe)) {
+ tc_dma_link_intr_urb(urb);
+ local_irq_restore(flags);
+ return;
+ }
+
+ /* Software must preset the toggle bits for Bulk and Ctrl */
+ if(usb_pipecontrol(urb->pipe)) {
+ /* Toggle bits are initialized only during setup transaction in a
+ CTRL transfer */
+ etrax_epid_set_toggle(epid, 0, 0);
+ etrax_epid_set_toggle(epid, 1, 0);
+ } else {
+ toggle = usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+ usb_pipeout(urb->pipe));
+ etrax_epid_set_toggle(epid, usb_pipeout(urb->pipe), toggle);
+ }
+
+ tc_dbg("Added SBs from (URB:0x%x %s %s) to epid %d: %s\n",
+ (unsigned int)urb, str_dir(urb->pipe), str_type(urb->pipe), epid,
+ sblist_to_str(urb_priv->first_sb));
+
+ /* We start the DMA sub channel without checking if it's running or not,
+ because:
+ 1) If it's already running, issuing the start command is a nop.
+ 2) We avoid a test-and-set race condition. */
+ switch(usb_pipetype(urb->pipe)) {
+ case PIPE_BULK:
+ /* Assert that the EP descriptor is disabled. */
+ ASSERT(!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)));
+
+ /* Set up and enable the EP descriptor. */
+ TxBulkEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
+ TxBulkEPList[epid].hw_len = 0;
+ TxBulkEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
+
+ /* Check if the dummy list is already with us (if several urbs were queued). */
+ if (usb_pipein(urb->pipe) && (TxBulkEPList[epid].next != virt_to_phys(&TxBulkDummyEPList[epid][0]))) {
+ tc_dbg("Inviting dummy list to the party for urb 0x%lx, epid %d",
+ (unsigned long)urb, epid);
+
+ /* We don't need to check if the DMA is at this EP or not before changing the
+ next pointer, since we will do it in one 32-bit write (EP descriptors are
+ 32-bit aligned). */
+ TxBulkEPList[epid].next = virt_to_phys(&TxBulkDummyEPList[epid][0]);
+ }
+
+ restart_dma8_sub0();
+
+ /* Update/restart the bulk start timer since we just started the channel.*/
+ mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL);
+ /* Update/restart the bulk eot timer since we just inserted traffic. */
+ mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
+ break;
+ case PIPE_CONTROL:
+ /* Assert that the EP descriptor is disabled. */
+ ASSERT(!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)));
+
+ /* Set up and enable the EP descriptor. */
+ TxCtrlEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
+ TxCtrlEPList[epid].hw_len = 0;
+ TxCtrlEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
+
+ *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB1_CMD, cmd, start);
+ break;
+ }
+ local_irq_restore(flags);
+}
+
+static void tc_dma_link_intr_urb(struct urb *urb) {
+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+ volatile struct USB_EP_Desc *tmp_ep;
+ struct USB_EP_Desc *ep_desc;
+ int i = 0, epid;
+ int pool_idx = 0;
+
+ ASSERT(urb_priv != NULL);
+ epid = urb_priv->epid;
+ ASSERT(urb_priv->interval > 0);
+ ASSERT(urb_priv->intr_ep_pool_length > 0);
+
+ tmp_ep = &TxIntrEPList[0];
+
+ /* Only insert one EP descriptor in list for Out Intr URBs.
+ We can only handle Out Intr with interval of 128ms because
+ it's not possible to insert several Out Intr EPs because they
+ are not consumed by the DMA. */
+ if(usb_pipeout(urb->pipe)) {
+ ep_desc = urb_priv->intr_ep_pool[0];
+ ASSERT(ep_desc);
+ ep_desc->next = tmp_ep->next;
+ tmp_ep->next = virt_to_phys(ep_desc);
+ i++;
+ } else {
+ /* Loop through Intr EP descriptor list and insert EP for URB at
+ specified interval */
+ do {
+ /* Each EP descriptor with eof flag sat signals a new frame */
+ if (tmp_ep->command & IO_MASK(USB_EP_command, eof)) {
+ /* Insert a EP from URBs EP pool at correct interval */
+ if ((i % urb_priv->interval) == 0) {
+ ep_desc = urb_priv->intr_ep_pool[pool_idx];
+ ASSERT(ep_desc);
+ ep_desc->next = tmp_ep->next;
+ tmp_ep->next = virt_to_phys(ep_desc);
+ pool_idx++;
+ ASSERT(pool_idx <= urb_priv->intr_ep_pool_length);
+ }
+ i++;
+ }
+ tmp_ep = (struct USB_EP_Desc *)phys_to_virt(tmp_ep->next);
+ } while(tmp_ep != &TxIntrEPList[0]);
+ }
+
+ intr_dbg("Added SBs to intr epid %d: %s interval:%d (%d EP)\n", epid,
+ sblist_to_str(urb_priv->first_sb), urb_priv->interval, pool_idx);
+
+ /* We start the DMA sub channel without checking if it's running or not,
+ because:
+ 1) If it's already running, issuing the start command is a nop.
+ 2) We avoid a test-and-set race condition. */
+ *R_DMA_CH8_SUB2_CMD = IO_STATE(R_DMA_CH8_SUB2_CMD, cmd, start);
+}
+
+static void tc_dma_process_isoc_urb(struct urb *urb) {
+ unsigned long flags;
+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+ int epid;
+
+ /* Do not disturb us while fiddling with EPs and epids */
+ local_irq_save(flags);
+
+ ASSERT(urb_priv);
+ ASSERT(urb_priv->first_sb);
+ epid = urb_priv->epid;
+
+ if(activeUrbList[epid] == NULL) {
+ /* EP is idle, so make this URB active */
+ activeUrbList[epid] = urb;
+ urb_list_del(urb, epid);
+ ASSERT(TxIsocEPList[epid].sub == 0);
+ ASSERT(!(TxIsocEPList[epid].command &
+ IO_STATE(USB_EP_command, enable, yes)));
+
+ /* Differentiate between In and Out Isoc. Because In SBs are not consumed*/
+ if(usb_pipein(urb->pipe)) {
+ /* Each EP for In Isoc will have only one SB descriptor, setup when
+ submitting the first active urb. We do it here by copying from URBs
+ pre-allocated SB. */
+ memcpy((void *)&(TxIsocSBList[epid]), urb_priv->first_sb,
+ sizeof(TxIsocSBList[epid]));
+ TxIsocEPList[epid].hw_len = 0;
+ TxIsocEPList[epid].sub = virt_to_phys(&(TxIsocSBList[epid]));
+ } else {
+ /* For Out Isoc we attach the pre-allocated list of SBs for the URB */
+ TxIsocEPList[epid].hw_len = 0;
+ TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
+
+ isoc_dbg("Attached first URB:0x%x[%d] to epid:%d first_sb:0x%x"
+ " last_sb::0x%x\n",
+ (unsigned int)urb, urb_priv->urb_num, epid,
+ (unsigned int)(urb_priv->first_sb),
+ (unsigned int)(urb_priv->last_sb));
+ }
+
+ if (urb->transfer_flags & URB_ISO_ASAP) {
+ /* The isoc transfer should be started as soon as possible. The
+ start_frame field is a return value if URB_ISO_ASAP was set. Comparing
+ R_USB_FM_NUMBER with a USB Chief trace shows that the first isoc IN
+ token is sent 2 frames later. I'm not sure how this affects usage of
+ the start_frame field by the device driver, or how it affects things
+ when USB_ISO_ASAP is not set, so therefore there's no compensation for
+ the 2 frame "lag" here. */
+ urb->start_frame = (*R_USB_FM_NUMBER & 0x7ff);
+ TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
+ urb_priv->urb_state = STARTED;
+ isoc_dbg("URB_ISO_ASAP set, urb->start_frame set to %d\n",
+ urb->start_frame);
+ } else {
+ /* Not started yet. */
+ urb_priv->urb_state = NOT_STARTED;
+ isoc_warn("urb_priv->urb_state set to NOT_STARTED for URB:0x%x\n",
+ (unsigned int)urb);
+ }
+
+ } else {
+ /* An URB is already active on the EP. Leave URB in queue and let
+ finish_isoc_urb process it after current active URB */
+ ASSERT(TxIsocEPList[epid].sub != 0);
+
+ if(usb_pipein(urb->pipe)) {
+ /* Because there already is a active In URB on this epid we do nothing
+ and the finish_isoc_urb() function will handle switching to next URB*/
+
+ } else { /* For Out Isoc, insert new URBs traffic last in SB-list. */
+ struct USB_SB_Desc *temp_sb_desc;
+
+ /* Set state STARTED to all Out Isoc URBs added to SB list because we
+ don't know how many of them that are finished before descr interrupt*/
+ urb_priv->urb_state = STARTED;
+
+ /* Find end of current SB list by looking for SB with eol flag sat */
+ temp_sb_desc = phys_to_virt(TxIsocEPList[epid].sub);
+ while ((temp_sb_desc->command & IO_MASK(USB_SB_command, eol)) !=
+ IO_STATE(USB_SB_command, eol, yes)) {
+ ASSERT(temp_sb_desc->next);
+ temp_sb_desc = phys_to_virt(temp_sb_desc->next);
+ }
+
+ isoc_dbg("Appended URB:0x%x[%d] (first:0x%x last:0x%x) to epid:%d"
+ " sub:0x%x eol:0x%x\n",
+ (unsigned int)urb, urb_priv->urb_num,
+ (unsigned int)(urb_priv->first_sb),
+ (unsigned int)(urb_priv->last_sb), epid,
+ (unsigned int)phys_to_virt(TxIsocEPList[epid].sub),
+ (unsigned int)temp_sb_desc);
+
+ /* Next pointer must be set before eol is removed. */
+ temp_sb_desc->next = virt_to_phys(urb_priv->first_sb);
+ /* Clear the previous end of list flag since there is a new in the
+ added SB descriptor list. */
+ temp_sb_desc->command &= ~IO_MASK(USB_SB_command, eol);
+
+ if (!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) {
+ __u32 epid_data;
+ /* 8.8.5 in Designer's Reference says we should check for and correct
+ any errors in the EP here. That should not be necessary if
+ epid_attn is handled correctly, so we assume all is ok. */
+ epid_data = etrax_epid_iso_get(epid);
+ if (IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data) !=
+ IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
+ isoc_err("Disabled Isoc EP with error:%d on epid:%d when appending"
+ " URB:0x%x[%d]\n",
+ IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data), epid,
+ (unsigned int)urb, urb_priv->urb_num);
+ }
+
+ /* The SB list was exhausted. */
+ if (virt_to_phys(urb_priv->last_sb) != TxIsocEPList[epid].sub) {
+ /* The new sublist did not get processed before the EP was
+ disabled. Setup the EP again. */
+
+ if(virt_to_phys(temp_sb_desc) == TxIsocEPList[epid].sub) {
+ isoc_dbg("EP for epid:%d stoped at SB:0x%x before newly inserted"
+ ", restarting from this URBs SB:0x%x\n",
+ epid, (unsigned int)temp_sb_desc,
+ (unsigned int)(urb_priv->first_sb));
+ TxIsocEPList[epid].hw_len = 0;
+ TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
+ urb->start_frame = (*R_USB_FM_NUMBER & 0x7ff);
+ /* Enable the EP again so data gets processed this time */
+ TxIsocEPList[epid].command |=
+ IO_STATE(USB_EP_command, enable, yes);
+
+ } else {
+ /* The EP has been disabled but not at end this URB (god knows
+ where). This should generate an epid_attn so we should not be
+ here */
+ isoc_warn("EP was disabled on sb:0x%x before SB list for"
+ " URB:0x%x[%d] got processed\n",
+ (unsigned int)phys_to_virt(TxIsocEPList[epid].sub),
+ (unsigned int)urb, urb_priv->urb_num);
+ }
+ } else {
+ /* This might happend if we are slow on this function and isn't
+ an error. */
+ isoc_dbg("EP was disabled and finished with SBs from appended"
+ " URB:0x%x[%d]\n", (unsigned int)urb, urb_priv->urb_num);
+ }
+ }
+ }
+ }
+
+ /* Start the DMA sub channel */
+ *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start);
+
+ local_irq_restore(flags);
+}
+
+static void tc_dma_unlink_intr_urb(struct urb *urb) {
+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+ volatile struct USB_EP_Desc *first_ep; /* First EP in the list. */
+ volatile struct USB_EP_Desc *curr_ep; /* Current EP, the iterator. */
+ volatile struct USB_EP_Desc *next_ep; /* The EP after current. */
+ volatile struct USB_EP_Desc *unlink_ep; /* The one we should remove from
+ the list. */
+ int count = 0;
+ volatile int timeout = 10000;
+ int epid;
+
+ /* Read 8.8.4 in Designer's Reference, "Removing an EP Descriptor from the
+ List". */
+ ASSERT(urb_priv);
+ ASSERT(urb_priv->intr_ep_pool_length > 0);
+ epid = urb_priv->epid;
+
+ /* First disable all Intr EPs belonging to epid for this URB */
+ first_ep = &TxIntrEPList[0];
+ curr_ep = first_ep;
+ do {
+ next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
+ if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
+ /* Disable EP */
+ next_ep->command &= ~IO_MASK(USB_EP_command, enable);
+ }
+ curr_ep = phys_to_virt(curr_ep->next);
+ } while (curr_ep != first_ep);
+
+
+ /* Now unlink all EPs belonging to this epid from Descr list */
+ first_ep = &TxIntrEPList[0];
+ curr_ep = first_ep;
+ do {
+ next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
+ if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
+ /* This is the one we should unlink. */
+ unlink_ep = next_ep;
+
+ /* Actually unlink the EP from the DMA list. */
+ curr_ep->next = unlink_ep->next;
+
+ /* Wait until the DMA is no longer at this descriptor. */
+ while((*R_DMA_CH8_SUB2_EP == virt_to_phys(unlink_ep)) &&
+ (timeout-- > 0));
+ if(timeout == 0) {
+ warn("Timeout while waiting for DMA-TX-Intr to leave unlink EP\n");
+ }
+
+ count++;
+ }
+ curr_ep = phys_to_virt(curr_ep->next);
+ } while (curr_ep != first_ep);
+
+ if(count != urb_priv->intr_ep_pool_length) {
+ intr_warn("Unlinked %d of %d Intr EPs for URB:0x%x[%d]\n", count,
+ urb_priv->intr_ep_pool_length, (unsigned int)urb,
+ urb_priv->urb_num);
+ } else {
+ intr_dbg("Unlinked %d of %d interrupt EPs for URB:0x%x\n", count,
+ urb_priv->intr_ep_pool_length, (unsigned int)urb);
+ }
+}
+
+static void check_finished_bulk_tx_epids(struct usb_hcd *hcd,
+ int timer) {
+ unsigned long flags;
+ int epid;
+ struct urb *urb;
+ struct crisv10_urb_priv * urb_priv;
+ __u32 epid_data;
+
+ /* Protect TxEPList */
+ local_irq_save(flags);
+
+ for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+ /* A finished EP descriptor is disabled and has a valid sub pointer */
+ if (!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) &&
+ (TxBulkEPList[epid].sub != 0)) {
+
+ /* Get the active URB for this epid */
+ urb = activeUrbList[epid];
+ /* Sanity checks */
+ ASSERT(urb);
+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+ ASSERT(urb_priv);
+
+ /* Only handle finished out Bulk EPs here,
+ and let RX interrupt take care of the rest */
+ if(!epid_out_traffic(epid)) {
+ continue;
+ }
+
+ if(timer) {
+ tc_warn("Found finished %s Bulk epid:%d URB:0x%x[%d] from timeout\n",
+ epid_out_traffic(epid) ? "Out" : "In", epid, (unsigned int)urb,
+ urb_priv->urb_num);
+ } else {
+ tc_dbg("Found finished %s Bulk epid:%d URB:0x%x[%d] from interrupt\n",
+ epid_out_traffic(epid) ? "Out" : "In", epid, (unsigned int)urb,
+ urb_priv->urb_num);
+ }
+
+ if(urb_priv->urb_state == UNLINK) {
+ /* This Bulk URB is requested to be unlinked, that means that the EP
+ has been disabled and we might not have sent all data */
+ tc_finish_urb(hcd, urb, urb->status);
+ continue;
+ }
+
+ ASSERT(urb_priv->urb_state == STARTED);
+ if (phys_to_virt(TxBulkEPList[epid].sub) != urb_priv->last_sb) {
+ tc_err("Endpoint got disabled before reaching last sb\n");
+ }
+
+ epid_data = etrax_epid_get(epid);
+ if (IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data) ==
+ IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
+ /* This means that the endpoint has no error, is disabled
+ and had inserted traffic, i.e. transfer successfully completed. */
+ tc_finish_urb(hcd, urb, 0);
+ } else {
+ /* Shouldn't happen. We expect errors to be caught by epid
+ attention. */
+ tc_err("Found disabled bulk EP desc (epid:%d error:%d)\n",
+ epid, IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data));
+ }
+ } else {
+ tc_dbg("Ignoring In Bulk epid:%d, let RX interrupt handle it\n", epid);
+ }
+ }
+
+ local_irq_restore(flags);
+}
+
+static void check_finished_ctrl_tx_epids(struct usb_hcd *hcd) {
+ unsigned long flags;
+ int epid;
+ struct urb *urb;
+ struct crisv10_urb_priv * urb_priv;
+ __u32 epid_data;
+
+ /* Protect TxEPList */
+ local_irq_save(flags);
+
+ for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+ if(epid == DUMMY_EPID)
+ continue;
+
+ /* A finished EP descriptor is disabled and has a valid sub pointer */
+ if (!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) &&
+ (TxCtrlEPList[epid].sub != 0)) {
+
+ /* Get the active URB for this epid */
+ urb = activeUrbList[epid];
+
+ if(urb == NULL) {
+ tc_warn("Found finished Ctrl epid:%d with no active URB\n", epid);
+ continue;
+ }
+
+ /* Sanity checks */
+ ASSERT(usb_pipein(urb->pipe));
+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+ ASSERT(urb_priv);
+ if (phys_to_virt(TxCtrlEPList[epid].sub) != urb_priv->last_sb) {
+ tc_err("Endpoint got disabled before reaching last sb\n");
+ }
+
+ epid_data = etrax_epid_get(epid);
+ if (IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data) ==
+ IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
+ /* This means that the endpoint has no error, is disabled
+ and had inserted traffic, i.e. transfer successfully completed. */
+
+ /* Check if RX-interrupt for In Ctrl has been processed before
+ finishing the URB */
+ if(urb_priv->ctrl_rx_done) {
+ tc_dbg("Finishing In Ctrl URB:0x%x[%d] in tx_interrupt\n",
+ (unsigned int)urb, urb_priv->urb_num);
+ tc_finish_urb(hcd, urb, 0);
+ } else {
+ /* If we get zout descriptor interrupt before RX was done for a
+ In Ctrl transfer, then we flag that and it will be finished
+ in the RX-Interrupt */
+ urb_priv->ctrl_zout_done = 1;
+ tc_dbg("Got zout descr interrupt before RX interrupt\n");
+ }
+ } else {
+ /* Shouldn't happen. We expect errors to be caught by epid
+ attention. */
+ tc_err("Found disabled Ctrl EP desc (epid:%d URB:0x%x[%d]) error_code:%d\n", epid, (unsigned int)urb, urb_priv->urb_num, IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data));
+ __dump_ep_desc(&(TxCtrlEPList[epid]));
+ __dump_ept_data(epid);
+ }
+ }
+ }
+ local_irq_restore(flags);
+}
+
+/* This function goes through all epids that are setup for Out Isoc transfers
+ and marks (isoc_out_done) all queued URBs that the DMA has finished
+ transfer for.
+ No URB completetion is done here to make interrupt routine return quickly.
+ URBs are completed later with help of complete_isoc_bottom_half() that
+ becomes schedules when this functions is finished. */
+static void check_finished_isoc_tx_epids(void) {
+ unsigned long flags;
+ int epid;
+ struct urb *urb;
+ struct crisv10_urb_priv * urb_priv;
+ struct USB_SB_Desc* sb_desc;
+ int epid_done;
+
+ /* Protect TxIsocEPList */
+ local_irq_save(flags);
+
+ for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+ if (TxIsocEPList[epid].sub == 0 || epid == INVALID_EPID ||
+ !epid_out_traffic(epid)) {
+ /* Nothing here to see. */
+ continue;
+ }
+ ASSERT(epid_inuse(epid));
+ ASSERT(epid_isoc(epid));
+
+ sb_desc = phys_to_virt(TxIsocEPList[epid].sub);
+ /* Find the last descriptor of the currently active URB for this ep.
+ This is the first descriptor in the sub list marked for a descriptor
+ interrupt. */
+ while (sb_desc && !IO_EXTRACT(USB_SB_command, intr, sb_desc->command)) {
+ sb_desc = sb_desc->next ? phys_to_virt(sb_desc->next) : 0;
+ }
+ ASSERT(sb_desc);
+
+ isoc_dbg("Descr IRQ checking epid:%d sub:0x%x intr:0x%x\n",
+ epid, (unsigned int)phys_to_virt(TxIsocEPList[epid].sub),
+ (unsigned int)sb_desc);
+
+ urb = activeUrbList[epid];
+ if(urb == NULL) {
+ isoc_err("Isoc Descr irq on epid:%d with no active URB\n", epid);
+ continue;
+ }
+
+ epid_done = 0;
+ while(urb && !epid_done) {
+ /* Sanity check. */
+ ASSERT(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
+ ASSERT(usb_pipeout(urb->pipe));
+
+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+ ASSERT(urb_priv);
+ ASSERT(urb_priv->urb_state == STARTED ||
+ urb_priv->urb_state == UNLINK);
+
+ if (sb_desc != urb_priv->last_sb) {
+ /* This urb has been sent. */
+ urb_priv->isoc_out_done = 1;
+
+ } else { /* Found URB that has last_sb as the interrupt reason */
+
+ /* Check if EP has been disabled, meaning that all transfers are done*/
+ if(!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) {
+ ASSERT((sb_desc->command & IO_MASK(USB_SB_command, eol)) ==
+ IO_STATE(USB_SB_command, eol, yes));
+ ASSERT(sb_desc->next == 0);
+ urb_priv->isoc_out_done = 1;
+ } else {
+ isoc_dbg("Skipping URB:0x%x[%d] because EP not disabled yet\n",
+ (unsigned int)urb, urb_priv->urb_num);
+ }
+ /* Stop looking any further in queue */
+ epid_done = 1;
+ }
+
+ if (!epid_done) {
+ if(urb == activeUrbList[epid]) {
+ urb = urb_list_first(epid);
+ } else {
+ urb = urb_list_next(urb, epid);
+ }
+ }
+ } /* END: while(urb && !epid_done) */
+ }
+
+ local_irq_restore(flags);
+}
+
+
+/* This is where the Out Isoc URBs are realy completed. This function is
+ scheduled from tc_dma_tx_interrupt() when one or more Out Isoc transfers
+ are done. This functions completes all URBs earlier marked with
+ isoc_out_done by fast interrupt routine check_finished_isoc_tx_epids() */
+
+static void complete_isoc_bottom_half(struct work_struct* work) {
+ struct crisv10_isoc_complete_data *comp_data;
+ struct usb_iso_packet_descriptor *packet;
+ struct crisv10_urb_priv * urb_priv;
+ unsigned long flags;
+ struct urb* urb;
+ int epid_done;
+ int epid;
+ int i;
+
+ comp_data = container_of(work, struct crisv10_isoc_complete_data, usb_bh);
+
+ local_irq_save(flags);
+
+ for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
+ if(!epid_inuse(epid) || !epid_isoc(epid) || !epid_out_traffic(epid) || epid == DUMMY_EPID) {
+ /* Only check valid Out Isoc epids */
+ continue;
+ }
+
+ isoc_dbg("Isoc bottom-half checking epid:%d, sub:0x%x\n", epid,
+ (unsigned int)phys_to_virt(TxIsocEPList[epid].sub));
+
+ /* The descriptor interrupt handler has marked all transmitted Out Isoc
+ URBs with isoc_out_done. Now we traverse all epids and for all that
+ have out Isoc traffic we traverse its URB list and complete the
+ transmitted URBs. */
+ epid_done = 0;
+ while (!epid_done) {
+
+ /* Get the active urb (if any) */
+ urb = activeUrbList[epid];
+ if (urb == 0) {
+ isoc_dbg("No active URB on epid:%d anymore\n", epid);
+ epid_done = 1;
+ continue;
+ }
+
+ /* Sanity check. */
+ ASSERT(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
+ ASSERT(usb_pipeout(urb->pipe));
+
+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+ ASSERT(urb_priv);
+
+ if (!(urb_priv->isoc_out_done)) {
+ /* We have reached URB that isn't flaged done yet, stop traversing. */
+ isoc_dbg("Stoped traversing Out Isoc URBs on epid:%d"
+ " before not yet flaged URB:0x%x[%d]\n",
+ epid, (unsigned int)urb, urb_priv->urb_num);
+ epid_done = 1;
+ continue;
+ }
+
+ /* This urb has been sent. */
+ isoc_dbg("Found URB:0x%x[%d] that is flaged isoc_out_done\n",
+ (unsigned int)urb, urb_priv->urb_num);
+
+ /* Set ok on transfered packets for this URB and finish it */
+ for (i = 0; i < urb->number_of_packets; i++) {
+ packet = &urb->iso_frame_desc[i];
+ packet->status = 0;
+ packet->actual_length = packet->length;
+ }
+ urb_priv->isoc_packet_counter = urb->number_of_packets;
+ tc_finish_urb(comp_data->hcd, urb, 0);
+
+ } /* END: while(!epid_done) */
+ } /* END: for(epid...) */
+
+ local_irq_restore(flags);
+ kmem_cache_free(isoc_compl_cache, comp_data);
+}
+
+
+static void check_finished_intr_tx_epids(struct usb_hcd *hcd) {
+ unsigned long flags;
+ int epid;
+ struct urb *urb;
+ struct crisv10_urb_priv * urb_priv;
+ volatile struct USB_EP_Desc *curr_ep; /* Current EP, the iterator. */
+ volatile struct USB_EP_Desc *next_ep; /* The EP after current. */
+
+ /* Protect TxintrEPList */
+ local_irq_save(flags);
+
+ for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+ if(!epid_inuse(epid) || !epid_intr(epid) || !epid_out_traffic(epid)) {
+ /* Nothing to see on this epid. Only check valid Out Intr epids */
+ continue;
+ }
+
+ urb = activeUrbList[epid];
+ if(urb == 0) {
+ intr_warn("Found Out Intr epid:%d with no active URB\n", epid);
+ continue;
+ }
+
+ /* Sanity check. */
+ ASSERT(usb_pipetype(urb->pipe) == PIPE_INTERRUPT);
+ ASSERT(usb_pipeout(urb->pipe));
+
+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+ ASSERT(urb_priv);
+
+ /* Go through EPs between first and second sof-EP. It's here Out Intr EPs
+ are inserted.*/
+ curr_ep = &TxIntrEPList[0];
+ do {
+ next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
+ if(next_ep == urb_priv->intr_ep_pool[0]) {
+ /* We found the Out Intr EP for this epid */
+
+ /* Disable it so it doesn't get processed again */
+ next_ep->command &= ~IO_MASK(USB_EP_command, enable);
+
+ /* Finish the active Out Intr URB with status OK */
+ tc_finish_urb(hcd, urb, 0);
+ }
+ curr_ep = phys_to_virt(curr_ep->next);
+ } while (curr_ep != &TxIntrEPList[1]);
+
+ }
+ local_irq_restore(flags);
+}
+
+/* Interrupt handler for DMA8/IRQ24 with subchannels (called from hardware intr) */
+static irqreturn_t tc_dma_tx_interrupt(int irq, void *vhc) {
+ struct usb_hcd *hcd = (struct usb_hcd*)vhc;
+ ASSERT(hcd);
+
+ if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub0_descr)) {
+ /* Clear this interrupt */
+ *R_DMA_CH8_SUB0_CLR_INTR = IO_STATE(R_DMA_CH8_SUB0_CLR_INTR, clr_descr, do);
+ restart_dma8_sub0();
+ }
+
+ if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub1_descr)) {
+ /* Clear this interrupt */
+ *R_DMA_CH8_SUB1_CLR_INTR = IO_STATE(R_DMA_CH8_SUB1_CLR_INTR, clr_descr, do);
+ check_finished_ctrl_tx_epids(hcd);
+ }
+
+ if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub2_descr)) {
+ /* Clear this interrupt */
+ *R_DMA_CH8_SUB2_CLR_INTR = IO_STATE(R_DMA_CH8_SUB2_CLR_INTR, clr_descr, do);
+ check_finished_intr_tx_epids(hcd);
+ }
+
+ if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub3_descr)) {
+ struct crisv10_isoc_complete_data* comp_data;
+
+ /* Flag done Out Isoc for later completion */
+ check_finished_isoc_tx_epids();
+
+ /* Clear this interrupt */
+ *R_DMA_CH8_SUB3_CLR_INTR = IO_STATE(R_DMA_CH8_SUB3_CLR_INTR, clr_descr, do);
+ /* Schedule bottom half of Out Isoc completion function. This function
+ finishes the URBs marked with isoc_out_done */
+ comp_data = (struct crisv10_isoc_complete_data*)
+ kmem_cache_alloc(isoc_compl_cache, GFP_ATOMIC);
+ ASSERT(comp_data != NULL);
+ comp_data ->hcd = hcd;
+
+ INIT_WORK(&comp_data->usb_bh, complete_isoc_bottom_half);
+ schedule_work(&comp_data->usb_bh);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/* Interrupt handler for DMA9/IRQ25 (called from hardware intr) */
+static irqreturn_t tc_dma_rx_interrupt(int irq, void *vhc) {
+ unsigned long flags;
+ struct urb *urb;
+ struct usb_hcd *hcd = (struct usb_hcd*)vhc;
+ struct crisv10_urb_priv *urb_priv;
+ int epid = 0;
+ int real_error;
+
+ ASSERT(hcd);
+
+ /* Clear this interrupt. */
+ *R_DMA_CH9_CLR_INTR = IO_STATE(R_DMA_CH9_CLR_INTR, clr_eop, do);
+
+ /* Custom clear interrupt for this interrupt */
+ /* The reason we cli here is that we call the driver's callback functions. */
+ local_irq_save(flags);
+
+ /* Note that this while loop assumes that all packets span only
+ one rx descriptor. */
+ while(myNextRxDesc->status & IO_MASK(USB_IN_status, eop)) {
+ epid = IO_EXTRACT(USB_IN_status, epid, myNextRxDesc->status);
+ /* Get the active URB for this epid */
+ urb = activeUrbList[epid];
+
+ ASSERT(epid_inuse(epid));
+ if (!urb) {
+ dma_err("No urb for epid %d in rx interrupt\n", epid);
+ goto skip_out;
+ }
+
+ /* Check if any errors on epid */
+ real_error = 0;
+ if (myNextRxDesc->status & IO_MASK(USB_IN_status, error)) {
+ __u32 r_usb_ept_data;
+
+ if (usb_pipeisoc(urb->pipe)) {
+ r_usb_ept_data = etrax_epid_iso_get(epid);
+ if((r_usb_ept_data & IO_MASK(R_USB_EPT_DATA_ISO, valid)) &&
+ (IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data) == 0) &&
+ (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata))) {
+ /* Not an error, just a failure to receive an expected iso
+ in packet in this frame. This is not documented
+ in the designers reference. Continue processing.
+ */
+ } else real_error = 1;
+ } else real_error = 1;
+ }
+
+ if(real_error) {
+ dma_err("Error in RX descr on epid:%d for URB 0x%x",
+ epid, (unsigned int)urb);
+ dump_ept_data(epid);
+ dump_in_desc(myNextRxDesc);
+ goto skip_out;
+ }
+
+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+ ASSERT(urb_priv);
+ ASSERT(urb_priv->urb_state == STARTED ||
+ urb_priv->urb_state == UNLINK);
+
+ if ((usb_pipetype(urb->pipe) == PIPE_BULK) ||
+ (usb_pipetype(urb->pipe) == PIPE_CONTROL) ||
+ (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) {
+
+ /* We get nodata for empty data transactions, and the rx descriptor's
+ hw_len field is not valid in that case. No data to copy in other
+ words. */
+ if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) {
+ /* No data to copy */
+ } else {
+ /*
+ dma_dbg("Processing RX for URB:0x%x epid:%d (data:%d ofs:%d)\n",
+ (unsigned int)urb, epid, myNextRxDesc->hw_len,
+ urb_priv->rx_offset);
+ */
+ /* Only copy data if URB isn't flaged to be unlinked*/
+ if(urb_priv->urb_state != UNLINK) {
+ /* Make sure the data fits in the buffer. */
+ if(urb_priv->rx_offset + myNextRxDesc->hw_len
+ <= urb->transfer_buffer_length) {
+
+ /* Copy the data to URBs buffer */
+ memcpy(urb->transfer_buffer + urb_priv->rx_offset,
+ phys_to_virt(myNextRxDesc->buf), myNextRxDesc->hw_len);
+ urb_priv->rx_offset += myNextRxDesc->hw_len;
+ } else {
+ /* Signal overflow when returning URB */
+ urb->status = -EOVERFLOW;
+ tc_finish_urb_later(hcd, urb, urb->status);
+ }
+ }
+ }
+
+ /* Check if it was the last packet in the transfer */
+ if (myNextRxDesc->status & IO_MASK(USB_IN_status, eot)) {
+ /* Special handling for In Ctrl URBs. */
+ if(usb_pipecontrol(urb->pipe) && usb_pipein(urb->pipe) &&
+ !(urb_priv->ctrl_zout_done)) {
+ /* Flag that RX part of Ctrl transfer is done. Because zout descr
+ interrupt hasn't happend yet will the URB be finished in the
+ TX-Interrupt. */
+ urb_priv->ctrl_rx_done = 1;
+ tc_dbg("Not finishing In Ctrl URB:0x%x from rx_interrupt, waiting"
+ " for zout\n", (unsigned int)urb);
+ } else {
+ tc_finish_urb(hcd, urb, 0);
+ }
+ }
+ } else { /* ISOC RX */
+ /*
+ isoc_dbg("Processing RX for epid:%d (URB:0x%x) ISOC pipe\n",
+ epid, (unsigned int)urb);
+ */
+
+ struct usb_iso_packet_descriptor *packet;
+
+ if (urb_priv->urb_state == UNLINK) {
+ isoc_warn("Ignoring Isoc Rx data for urb being unlinked.\n");
+ goto skip_out;
+ } else if (urb_priv->urb_state == NOT_STARTED) {
+ isoc_err("What? Got Rx data for Isoc urb that isn't started?\n");
+ goto skip_out;
+ }
+
+ packet = &urb->iso_frame_desc[urb_priv->isoc_packet_counter];
+ ASSERT(packet);
+ packet->status = 0;
+
+ if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) {
+ /* We get nodata for empty data transactions, and the rx descriptor's
+ hw_len field is not valid in that case. We copy 0 bytes however to
+ stay in synch. */
+ packet->actual_length = 0;
+ } else {
+ packet->actual_length = myNextRxDesc->hw_len;
+ /* Make sure the data fits in the buffer. */
+ ASSERT(packet->actual_length <= packet->length);
+ memcpy(urb->transfer_buffer + packet->offset,
+ phys_to_virt(myNextRxDesc->buf), packet->actual_length);
+ if(packet->actual_length > 0)
+ isoc_dbg("Copied %d bytes, packet %d for URB:0x%x[%d]\n",
+ packet->actual_length, urb_priv->isoc_packet_counter,
+ (unsigned int)urb, urb_priv->urb_num);
+ }
+
+ /* Increment the packet counter. */
+ urb_priv->isoc_packet_counter++;
+
+ /* Note that we don't care about the eot field in the rx descriptor's
+ status. It will always be set for isoc traffic. */
+ if (urb->number_of_packets == urb_priv->isoc_packet_counter) {
+ /* Complete the urb with status OK. */
+ tc_finish_urb(hcd, urb, 0);
+ }
+ }
+
+ skip_out:
+ myNextRxDesc->status = 0;
+ myNextRxDesc->command |= IO_MASK(USB_IN_command, eol);
+ myLastRxDesc->command &= ~IO_MASK(USB_IN_command, eol);
+ myLastRxDesc = myNextRxDesc;
+ myNextRxDesc = phys_to_virt(myNextRxDesc->next);
+ flush_etrax_cache();
+ *R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, restart);
+ }
+
+ local_irq_restore(flags);
+
+ return IRQ_HANDLED;
+}
+
+static void tc_bulk_start_timer_func(unsigned long dummy) {
+ /* We might enable an EP descriptor behind the current DMA position when
+ it's about to decide that there are no more bulk traffic and it should
+ stop the bulk channel.
+ Therefore we periodically check if the bulk channel is stopped and there
+ is an enabled bulk EP descriptor, in which case we start the bulk
+ channel. */
+
+ if (!(*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd))) {
+ int epid;
+
+ timer_dbg("bulk_start_timer: Bulk DMA channel not running.\n");
+
+ for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+ if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+ timer_warn("Found enabled EP for epid %d, starting bulk channel.\n",
+ epid);
+ restart_dma8_sub0();
+
+ /* Restart the bulk eot timer since we just started the bulk channel.*/
+ mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
+
+ /* No need to search any further. */
+ break;
+ }
+ }
+ } else {
+ timer_dbg("bulk_start_timer: Bulk DMA channel running.\n");
+ }
+}
+
+static void tc_bulk_eot_timer_func(unsigned long dummy) {
+ struct usb_hcd *hcd = (struct usb_hcd*)dummy;
+ ASSERT(hcd);
+ /* Because of a race condition in the top half, we might miss a bulk eot.
+ This timer "simulates" a bulk eot if we don't get one for a while,
+ hopefully correcting the situation. */
+ timer_dbg("bulk_eot_timer timed out.\n");
+ check_finished_bulk_tx_epids(hcd, 1);
+}
+
+
+/*************************************************************/
+/*************************************************************/
+/* Device driver block */
+/*************************************************************/
+/*************************************************************/
+
+/* Forward declarations for device driver functions */
+static int devdrv_hcd_probe(struct device *);
+static int devdrv_hcd_remove(struct device *);
+#ifdef CONFIG_PM
+static int devdrv_hcd_suspend(struct device *, u32, u32);
+static int devdrv_hcd_resume(struct device *, u32);
+#endif /* CONFIG_PM */
+
+/* the device */
+static struct platform_device *devdrv_hc_platform_device;
+
+/* device driver interface */
+static struct device_driver devdrv_hc_device_driver = {
+ .name = (char *) hc_name,
+ .bus = &platform_bus_type,
+
+ .probe = devdrv_hcd_probe,
+ .remove = devdrv_hcd_remove,
+
+#ifdef CONFIG_PM
+ .suspend = devdrv_hcd_suspend,
+ .resume = devdrv_hcd_resume,
+#endif /* CONFIG_PM */
+};
+
+/* initialize the host controller and driver */
+static int __init_or_module devdrv_hcd_probe(struct device *dev)
+{
+ struct usb_hcd *hcd;
+ struct crisv10_hcd *crisv10_hcd;
+ int retval;
+
+ /* Check DMA burst length */
+ if(IO_EXTRACT(R_BUS_CONFIG, dma_burst, *R_BUS_CONFIG) !=
+ IO_STATE(R_BUS_CONFIG, dma_burst, burst32)) {
+ devdrv_err("Invalid DMA burst length in Etrax 100LX,"
+ " needs to be 32\n");
+ return -EPERM;
+ }
+
+ hcd = usb_create_hcd(&crisv10_hc_driver, dev, dev->bus_id);
+ if (!hcd)
+ return -ENOMEM;
+
+ crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+ spin_lock_init(&crisv10_hcd->lock);
+ crisv10_hcd->num_ports = num_ports();
+ crisv10_hcd->running = 0;
+
+ dev_set_drvdata(dev, crisv10_hcd);
+
+ devdrv_dbg("ETRAX USB IRQs HC:%d RX:%d TX:%d\n", ETRAX_USB_HC_IRQ,
+ ETRAX_USB_RX_IRQ, ETRAX_USB_TX_IRQ);
+
+ /* Print out chip version read from registers */
+ int rev_maj = *R_USB_REVISION & IO_MASK(R_USB_REVISION, major);
+ int rev_min = *R_USB_REVISION & IO_MASK(R_USB_REVISION, minor);
+ if(rev_min == 0) {
+ devdrv_info("Etrax 100LX USB Revision %d v1,2\n", rev_maj);
+ } else {
+ devdrv_info("Etrax 100LX USB Revision %d v%d\n", rev_maj, rev_min);
+ }
+
+ devdrv_info("Bulk timer interval, start:%d eot:%d\n",
+ BULK_START_TIMER_INTERVAL,
+ BULK_EOT_TIMER_INTERVAL);
+
+
+ /* Init root hub data structures */
+ if(rh_init()) {
+ devdrv_err("Failed init data for Root Hub\n");
+ retval = -ENOMEM;
+ }
+
+ if(port_in_use(0)) {
+ if (cris_request_io_interface(if_usb_1, "ETRAX100LX USB-HCD")) {
+ printk(KERN_CRIT "usb-host: request IO interface usb1 failed");
+ retval = -EBUSY;
+ goto out;
+ }
+ devdrv_info("Claimed interface for USB physical port 1\n");
+ }
+ if(port_in_use(1)) {
+ if (cris_request_io_interface(if_usb_2, "ETRAX100LX USB-HCD")) {
+ /* Free first interface if second failed to be claimed */
+ if(port_in_use(0)) {
+ cris_free_io_interface(if_usb_1);
+ }
+ printk(KERN_CRIT "usb-host: request IO interface usb2 failed");
+ retval = -EBUSY;
+ goto out;
+ }
+ devdrv_info("Claimed interface for USB physical port 2\n");
+ }
+
+ /* Init transfer controller structs and locks */
+ if((retval = tc_init(hcd)) != 0) {
+ goto out;
+ }
+
+ /* Attach interrupt functions for DMA and init DMA controller */
+ if((retval = tc_dma_init(hcd)) != 0) {
+ goto out;
+ }
+
+ /* Attach the top IRQ handler for USB controller interrupts */
+ if (request_irq(ETRAX_USB_HC_IRQ, crisv10_hcd_top_irq, 0,
+ "ETRAX 100LX built-in USB (HC)", hcd)) {
+ err("Could not allocate IRQ %d for USB", ETRAX_USB_HC_IRQ);
+ retval = -EBUSY;
+ goto out;
+ }
+
+ /* iso_eof is only enabled when isoc traffic is running. */
+ *R_USB_IRQ_MASK_SET =
+ /* IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set) | */
+ IO_STATE(R_USB_IRQ_MASK_SET, bulk_eot, set) |
+ IO_STATE(R_USB_IRQ_MASK_SET, epid_attn, set) |
+ IO_STATE(R_USB_IRQ_MASK_SET, port_status, set) |
+ IO_STATE(R_USB_IRQ_MASK_SET, ctl_status, set);
+
+
+ crisv10_ready_wait();
+ /* Reset the USB interface. */
+ *R_USB_COMMAND =
+ IO_STATE(R_USB_COMMAND, port_sel, nop) |
+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+ IO_STATE(R_USB_COMMAND, ctrl_cmd, reset);
+
+ /* Designer's Reference, p. 8 - 10 says we should Initate R_USB_FM_PSTART to
+ 0x2A30 (10800), to guarantee that control traffic gets 10% of the
+ bandwidth, and periodic transfer may allocate the rest (90%).
+ This doesn't work though.
+ The value 11960 is chosen to be just after the SOF token, with a couple
+ of bit times extra for possible bit stuffing. */
+ *R_USB_FM_PSTART = IO_FIELD(R_USB_FM_PSTART, value, 11960);
+
+ crisv10_ready_wait();
+ /* Configure the USB interface as a host controller. */
+ *R_USB_COMMAND =
+ IO_STATE(R_USB_COMMAND, port_sel, nop) |
+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+ IO_STATE(R_USB_COMMAND, ctrl_cmd, host_config);
+
+
+ /* Check so controller not busy before enabling ports */
+ crisv10_ready_wait();
+
+ /* Enable selected USB ports */
+ if(port_in_use(0)) {
+ *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no);
+ } else {
+ *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, yes);
+ }
+ if(port_in_use(1)) {
+ *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no);
+ } else {
+ *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, yes);
+ }
+
+ crisv10_ready_wait();
+ /* Start processing of USB traffic. */
+ *R_USB_COMMAND =
+ IO_STATE(R_USB_COMMAND, port_sel, nop) |
+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+ IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
+
+ /* Do not continue probing initialization before USB interface is done */
+ crisv10_ready_wait();
+
+ /* Register our Host Controller to USB Core
+ * Finish the remaining parts of generic HCD initialization: allocate the
+ * buffers of consistent memory, register the bus
+ * and call the driver's reset() and start() routines. */
+ retval = usb_add_hcd(hcd, ETRAX_USB_HC_IRQ, IRQF_DISABLED);
+ if (retval != 0) {
+ devdrv_err("Failed registering HCD driver\n");
+ goto out;
+ }
+
+ return 0;
+
+ out:
+ devdrv_hcd_remove(dev);
+ return retval;
+}
+
+
+/* cleanup after the host controller and driver */
+static int __init_or_module devdrv_hcd_remove(struct device *dev)
+{
+ struct crisv10_hcd *crisv10_hcd = dev_get_drvdata(dev);
+ struct usb_hcd *hcd;
+
+ if (!crisv10_hcd)
+ return 0;
+ hcd = crisv10_hcd_to_hcd(crisv10_hcd);
+
+
+ /* Stop USB Controller in Etrax 100LX */
+ crisv10_hcd_reset(hcd);
+
+ usb_remove_hcd(hcd);
+ devdrv_dbg("Removed HCD from USB Core\n");
+
+ /* Free USB Controller IRQ */
+ free_irq(ETRAX_USB_HC_IRQ, NULL);
+
+ /* Free resources */
+ tc_dma_destroy();
+ tc_destroy();
+
+
+ if(port_in_use(0)) {
+ cris_free_io_interface(if_usb_1);
+ }
+ if(port_in_use(1)) {
+ cris_free_io_interface(if_usb_2);
+ }
+
+ devdrv_dbg("Freed all claimed resources\n");
+
+ return 0;
+}
+
+
+#ifdef CONFIG_PM
+
+static int devdrv_hcd_suspend(struct usb_hcd *hcd, u32 state, u32 level)
+{
+ return 0; /* no-op for now */
+}
+
+static int devdrv_hcd_resume(struct usb_hcd *hcd, u32 level)
+{
+ return 0; /* no-op for now */
+}
+
+#endif /* CONFIG_PM */
+
+
+/*************************************************************/
+/*************************************************************/
+/* Module block */
+/*************************************************************/
+/*************************************************************/
+
+/* register driver */
+static int __init module_hcd_init(void)
+{
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ /* Here we select enabled ports by following defines created from
+ menuconfig */
+#ifndef CONFIG_ETRAX_USB_HOST_PORT1
+ ports &= ~(1<<0);
+#endif
+#ifndef CONFIG_ETRAX_USB_HOST_PORT2
+ ports &= ~(1<<1);
+#endif
+
+ printk(KERN_INFO "%s version "VERSION" "COPYRIGHT"\n", product_desc);
+
+ devdrv_hc_platform_device =
+ platform_device_register_simple((char *) hc_name, 0, NULL, 0);
+
+ if (IS_ERR(devdrv_hc_platform_device))
+ return PTR_ERR(devdrv_hc_platform_device);
+ return driver_register(&devdrv_hc_device_driver);
+ /*
+ * Note that we do not set the DMA mask for the device,
+ * i.e. we pretend that we will use PIO, since no specific
+ * allocation routines are needed for DMA buffers. This will
+ * cause the HCD buffer allocation routines to fall back to
+ * kmalloc().
+ */
+}
+
+/* unregister driver */
+static void __exit module_hcd_exit(void)
+{
+ driver_unregister(&devdrv_hc_device_driver);
+}
+
+
+/* Module hooks */
+module_init(module_hcd_init);
+module_exit(module_hcd_exit);
--- /dev/null
+#ifndef __LINUX_ETRAX_USB_H
+#define __LINUX_ETRAX_USB_H
+
+#include <linux/types.h>
+#include <linux/list.h>
+
+struct USB_IN_Desc {
+ volatile __u16 sw_len;
+ volatile __u16 command;
+ volatile unsigned long next;
+ volatile unsigned long buf;
+ volatile __u16 hw_len;
+ volatile __u16 status;
+};
+
+struct USB_SB_Desc {
+ volatile __u16 sw_len;
+ volatile __u16 command;
+ volatile unsigned long next;
+ volatile unsigned long buf;
+};
+
+struct USB_EP_Desc {
+ volatile __u16 hw_len;
+ volatile __u16 command;
+ volatile unsigned long sub;
+ volatile unsigned long next;
+};
+
+
+/* Root Hub port status struct */
+struct crisv10_rh {
+ volatile __u16 wPortChange[2];
+ volatile __u16 wPortStatusPrev[2];
+};
+
+/* HCD description */
+struct crisv10_hcd {
+ spinlock_t lock;
+ __u8 num_ports;
+ __u8 running;
+};
+
+
+/* Endpoint HC private data description */
+struct crisv10_ep_priv {
+ int epid;
+};
+
+/* Additional software state info for a USB Controller epid */
+struct etrax_epid {
+ __u8 inuse; /* !0 = setup in Etrax and used for a endpoint */
+ __u8 disabled; /* !0 = Temporarly disabled to avoid resubmission */
+ __u8 type; /* Setup as: PIPE_BULK, PIPE_CONTROL ... */
+ __u8 out_traffic; /* !0 = This epid is for out traffic */
+};
+
+/* Struct to hold information of scheduled later URB completion */
+struct urb_later_data {
+ struct delayed_work dws;
+ struct usb_hcd *hcd;
+ struct urb *urb;
+ int urb_num;
+ int status;
+};
+
+
+typedef enum {
+ STARTED,
+ NOT_STARTED,
+ UNLINK,
+} crisv10_urb_state_t;
+
+
+struct crisv10_urb_priv {
+ /* Sequence number for this URB. Every new submited URB gets this from
+ a incrementing counter. Used when a URB is scheduled for later finish to
+ be sure that the intended URB hasn't already been completed (device
+ drivers has a tendency to reuse URBs once they are completed, causing us
+ to not be able to single old ones out only based on the URB pointer.) */
+ __u32 urb_num;
+
+ /* The first_sb field is used for freeing all SB descriptors belonging
+ to an urb. The corresponding ep descriptor's sub pointer cannot be
+ used for this since the DMA advances the sub pointer as it processes
+ the sb list. */
+ struct USB_SB_Desc *first_sb;
+
+ /* The last_sb field referes to the last SB descriptor that belongs to
+ this urb. This is important to know so we can free the SB descriptors
+ that ranges between first_sb and last_sb. */
+ struct USB_SB_Desc *last_sb;
+
+ /* The rx_offset field is used in ctrl and bulk traffic to keep track
+ of the offset in the urb's transfer_buffer where incoming data should be
+ copied to. */
+ __u32 rx_offset;
+
+ /* Counter used in isochronous transfers to keep track of the
+ number of packets received/transmitted. */
+ __u32 isoc_packet_counter;
+
+ /* Flag that marks if this Isoc Out URB has finished it's transfer. Used
+ because several URBs can be finished before list is processed */
+ __u8 isoc_out_done;
+
+ /* This field is used to pass information about the urb's current state
+ between the various interrupt handlers (thus marked volatile). */
+ volatile crisv10_urb_state_t urb_state;
+
+ /* In Ctrl transfers consist of (at least) 3 packets: SETUP, IN and ZOUT.
+ When DMA8 sub-channel 2 has processed the SB list for this sequence we
+ get a interrupt. We also get a interrupt for In transfers and which
+ one of these interrupts that comes first depends of data size and device.
+ To be sure that we have got both interrupts before we complete the URB
+ we have these to flags that shows which part that has completed.
+ We can then check when we get one of the interrupts that if the other has
+ occured it's safe for us to complete the URB, otherwise we set appropriate
+ flag and do the completion when we get the other interrupt. */
+ volatile unsigned char ctrl_zout_done;
+ volatile unsigned char ctrl_rx_done;
+
+ /* Connection between the submitted urb and ETRAX epid number */
+ __u8 epid;
+
+ /* The rx_data_list field is used for periodic traffic, to hold
+ received data for later processing in the the complete_urb functions,
+ where the data us copied to the urb's transfer_buffer. Basically, we
+ use this intermediate storage because we don't know when it's safe to
+ reuse the transfer_buffer (FIXME?). */
+ struct list_head rx_data_list;
+
+
+ /* The interval time rounded up to closest 2^N */
+ int interval;
+
+ /* Pool of EP descriptors needed if it's a INTR transfer.
+ Amount of EPs in pool correspons to how many INTR that should
+ be inserted in TxIntrEPList (max 128, defined by MAX_INTR_INTERVAL) */
+ struct USB_EP_Desc* intr_ep_pool[128];
+
+ /* The mount of EPs allocated for this INTR URB */
+ int intr_ep_pool_length;
+
+ /* Pointer to info struct if URB is scheduled to be finished later */
+ struct urb_later_data* later_data;
+
+ /* Allocated bandwidth for isochronous and interrupt traffic */
+ int bandwidth;
+};
+
+
+/* This struct is for passing data from the top half to the bottom half irq
+ handlers */
+struct crisv10_irq_reg {
+ struct usb_hcd* hcd;
+ __u32 r_usb_epid_attn;
+ __u8 r_usb_status;
+ __u16 r_usb_rh_port_status_1;
+ __u16 r_usb_rh_port_status_2;
+ __u32 r_usb_irq_mask_read;
+ __u32 r_usb_fm_number;
+ struct work_struct usb_bh;
+};
+
+
+/* This struct is for passing data from the isoc top half to the isoc bottom
+ half. */
+struct crisv10_isoc_complete_data {
+ struct usb_hcd *hcd;
+ struct urb *urb;
+ struct work_struct usb_bh;
+};
+
+/* Entry item for URB lists for each endpint */
+typedef struct urb_entry
+{
+ struct urb *urb;
+ struct list_head list;
+} urb_entry_t;
+
+/* ---------------------------------------------------------------------------
+ Virtual Root HUB
+ ------------------------------------------------------------------------- */
+/* destination of request */
+#define RH_INTERFACE 0x01
+#define RH_ENDPOINT 0x02
+#define RH_OTHER 0x03
+
+#define RH_CLASS 0x20
+#define RH_VENDOR 0x40
+
+/* Requests: bRequest << 8 | bmRequestType */
+#define RH_GET_STATUS 0x0080
+#define RH_CLEAR_FEATURE 0x0100
+#define RH_SET_FEATURE 0x0300
+#define RH_SET_ADDRESS 0x0500
+#define RH_GET_DESCRIPTOR 0x0680
+#define RH_SET_DESCRIPTOR 0x0700
+#define RH_GET_CONFIGURATION 0x0880
+#define RH_SET_CONFIGURATION 0x0900
+#define RH_GET_STATE 0x0280
+#define RH_GET_INTERFACE 0x0A80
+#define RH_SET_INTERFACE 0x0B00
+#define RH_SYNC_FRAME 0x0C80
+/* Our Vendor Specific Request */
+#define RH_SET_EP 0x2000
+
+
+/* Hub port features */
+#define RH_PORT_CONNECTION 0x00
+#define RH_PORT_ENABLE 0x01
+#define RH_PORT_SUSPEND 0x02
+#define RH_PORT_OVER_CURRENT 0x03
+#define RH_PORT_RESET 0x04
+#define RH_PORT_POWER 0x08
+#define RH_PORT_LOW_SPEED 0x09
+#define RH_C_PORT_CONNECTION 0x10
+#define RH_C_PORT_ENABLE 0x11
+#define RH_C_PORT_SUSPEND 0x12
+#define RH_C_PORT_OVER_CURRENT 0x13
+#define RH_C_PORT_RESET 0x14
+
+/* Hub features */
+#define RH_C_HUB_LOCAL_POWER 0x00
+#define RH_C_HUB_OVER_CURRENT 0x01
+
+#define RH_DEVICE_REMOTE_WAKEUP 0x00
+#define RH_ENDPOINT_STALL 0x01
+
+/* Our Vendor Specific feature */
+#define RH_REMOVE_EP 0x00
+
+
+#define RH_ACK 0x01
+#define RH_REQ_ERR -1
+#define RH_NACK 0x00
+
+/* Field definitions for */
+
+#define USB_IN_command__eol__BITNR 0 /* command macros */
+#define USB_IN_command__eol__WIDTH 1
+#define USB_IN_command__eol__no 0
+#define USB_IN_command__eol__yes 1
+
+#define USB_IN_command__intr__BITNR 3
+#define USB_IN_command__intr__WIDTH 1
+#define USB_IN_command__intr__no 0
+#define USB_IN_command__intr__yes 1
+
+#define USB_IN_status__eop__BITNR 1 /* status macros. */
+#define USB_IN_status__eop__WIDTH 1
+#define USB_IN_status__eop__no 0
+#define USB_IN_status__eop__yes 1
+
+#define USB_IN_status__eot__BITNR 5
+#define USB_IN_status__eot__WIDTH 1
+#define USB_IN_status__eot__no 0
+#define USB_IN_status__eot__yes 1
+
+#define USB_IN_status__error__BITNR 6
+#define USB_IN_status__error__WIDTH 1
+#define USB_IN_status__error__no 0
+#define USB_IN_status__error__yes 1
+
+#define USB_IN_status__nodata__BITNR 7
+#define USB_IN_status__nodata__WIDTH 1
+#define USB_IN_status__nodata__no 0
+#define USB_IN_status__nodata__yes 1
+
+#define USB_IN_status__epid__BITNR 8
+#define USB_IN_status__epid__WIDTH 5
+
+#define USB_EP_command__eol__BITNR 0
+#define USB_EP_command__eol__WIDTH 1
+#define USB_EP_command__eol__no 0
+#define USB_EP_command__eol__yes 1
+
+#define USB_EP_command__eof__BITNR 1
+#define USB_EP_command__eof__WIDTH 1
+#define USB_EP_command__eof__no 0
+#define USB_EP_command__eof__yes 1
+
+#define USB_EP_command__intr__BITNR 3
+#define USB_EP_command__intr__WIDTH 1
+#define USB_EP_command__intr__no 0
+#define USB_EP_command__intr__yes 1
+
+#define USB_EP_command__enable__BITNR 4
+#define USB_EP_command__enable__WIDTH 1
+#define USB_EP_command__enable__no 0
+#define USB_EP_command__enable__yes 1
+
+#define USB_EP_command__hw_valid__BITNR 5
+#define USB_EP_command__hw_valid__WIDTH 1
+#define USB_EP_command__hw_valid__no 0
+#define USB_EP_command__hw_valid__yes 1
+
+#define USB_EP_command__epid__BITNR 8
+#define USB_EP_command__epid__WIDTH 5
+
+#define USB_SB_command__eol__BITNR 0 /* command macros. */
+#define USB_SB_command__eol__WIDTH 1
+#define USB_SB_command__eol__no 0
+#define USB_SB_command__eol__yes 1
+
+#define USB_SB_command__eot__BITNR 1
+#define USB_SB_command__eot__WIDTH 1
+#define USB_SB_command__eot__no 0
+#define USB_SB_command__eot__yes 1
+
+#define USB_SB_command__intr__BITNR 3
+#define USB_SB_command__intr__WIDTH 1
+#define USB_SB_command__intr__no 0
+#define USB_SB_command__intr__yes 1
+
+#define USB_SB_command__tt__BITNR 4
+#define USB_SB_command__tt__WIDTH 2
+#define USB_SB_command__tt__zout 0
+#define USB_SB_command__tt__in 1
+#define USB_SB_command__tt__out 2
+#define USB_SB_command__tt__setup 3
+
+
+#define USB_SB_command__rem__BITNR 8
+#define USB_SB_command__rem__WIDTH 6
+
+#define USB_SB_command__full__BITNR 6
+#define USB_SB_command__full__WIDTH 1
+#define USB_SB_command__full__no 0
+#define USB_SB_command__full__yes 1
+
+#endif
+++ /dev/null
-/*
- * usb-host.c: ETRAX 100LX USB Host Controller Driver (HCD)
- *
- * Copyright (c) 2002, 2003 Axis Communications AB.
- */
-
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/unistd.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/dma.h>
-#include <asm/system.h>
-#include <asm/arch/svinto.h>
-
-#include <linux/usb.h>
-/* Ugly include because we don't live with the other host drivers. */
-#include <../drivers/usb/core/hcd.h>
-#include <../drivers/usb/core/usb.h>
-
-#include "hc_crisv10.h"
-
-#define ETRAX_USB_HC_IRQ USB_HC_IRQ_NBR
-#define ETRAX_USB_RX_IRQ USB_DMA_RX_IRQ_NBR
-#define ETRAX_USB_TX_IRQ USB_DMA_TX_IRQ_NBR
-
-static const char *usb_hcd_version = "$Revision: 1.2 $";
-
-#undef KERN_DEBUG
-#define KERN_DEBUG ""
-
-
-#undef USB_DEBUG_RH
-#undef USB_DEBUG_EPID
-#undef USB_DEBUG_SB
-#undef USB_DEBUG_DESC
-#undef USB_DEBUG_URB
-#undef USB_DEBUG_TRACE
-#undef USB_DEBUG_BULK
-#undef USB_DEBUG_CTRL
-#undef USB_DEBUG_INTR
-#undef USB_DEBUG_ISOC
-
-#ifdef USB_DEBUG_RH
-#define dbg_rh(format, arg...) printk(KERN_DEBUG __FILE__ ": (RH) " format "\n" , ## arg)
-#else
-#define dbg_rh(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_EPID
-#define dbg_epid(format, arg...) printk(KERN_DEBUG __FILE__ ": (EPID) " format "\n" , ## arg)
-#else
-#define dbg_epid(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_SB
-#define dbg_sb(format, arg...) printk(KERN_DEBUG __FILE__ ": (SB) " format "\n" , ## arg)
-#else
-#define dbg_sb(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_CTRL
-#define dbg_ctrl(format, arg...) printk(KERN_DEBUG __FILE__ ": (CTRL) " format "\n" , ## arg)
-#else
-#define dbg_ctrl(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_BULK
-#define dbg_bulk(format, arg...) printk(KERN_DEBUG __FILE__ ": (BULK) " format "\n" , ## arg)
-#else
-#define dbg_bulk(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_INTR
-#define dbg_intr(format, arg...) printk(KERN_DEBUG __FILE__ ": (INTR) " format "\n" , ## arg)
-#else
-#define dbg_intr(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_ISOC
-#define dbg_isoc(format, arg...) printk(KERN_DEBUG __FILE__ ": (ISOC) " format "\n" , ## arg)
-#else
-#define dbg_isoc(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_TRACE
-#define DBFENTER (printk(": Entering: %s\n", __FUNCTION__))
-#define DBFEXIT (printk(": Exiting: %s\n", __FUNCTION__))
-#else
-#define DBFENTER do {} while (0)
-#define DBFEXIT do {} while (0)
-#endif
-
-#define usb_pipeslow(pipe) (((pipe) >> 26) & 1)
-
-/*-------------------------------------------------------------------
- Virtual Root Hub
- -------------------------------------------------------------------*/
-
-static __u8 root_hub_dev_des[] =
-{
- 0x12, /* __u8 bLength; */
- 0x01, /* __u8 bDescriptorType; Device */
- 0x00, /* __le16 bcdUSB; v1.0 */
- 0x01,
- 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */
- 0x00, /* __u8 bDeviceSubClass; */
- 0x00, /* __u8 bDeviceProtocol; */
- 0x08, /* __u8 bMaxPacketSize0; 8 Bytes */
- 0x00, /* __le16 idVendor; */
- 0x00,
- 0x00, /* __le16 idProduct; */
- 0x00,
- 0x00, /* __le16 bcdDevice; */
- 0x00,
- 0x00, /* __u8 iManufacturer; */
- 0x02, /* __u8 iProduct; */
- 0x01, /* __u8 iSerialNumber; */
- 0x01 /* __u8 bNumConfigurations; */
-};
-
-/* Configuration descriptor */
-static __u8 root_hub_config_des[] =
-{
- 0x09, /* __u8 bLength; */
- 0x02, /* __u8 bDescriptorType; Configuration */
- 0x19, /* __le16 wTotalLength; */
- 0x00,
- 0x01, /* __u8 bNumInterfaces; */
- 0x01, /* __u8 bConfigurationValue; */
- 0x00, /* __u8 iConfiguration; */
- 0x40, /* __u8 bmAttributes; Bit 7: Bus-powered */
- 0x00, /* __u8 MaxPower; */
-
- /* interface */
- 0x09, /* __u8 if_bLength; */
- 0x04, /* __u8 if_bDescriptorType; Interface */
- 0x00, /* __u8 if_bInterfaceNumber; */
- 0x00, /* __u8 if_bAlternateSetting; */
- 0x01, /* __u8 if_bNumEndpoints; */
- 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */
- 0x00, /* __u8 if_bInterfaceSubClass; */
- 0x00, /* __u8 if_bInterfaceProtocol; */
- 0x00, /* __u8 if_iInterface; */
-
- /* endpoint */
- 0x07, /* __u8 ep_bLength; */
- 0x05, /* __u8 ep_bDescriptorType; Endpoint */
- 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */
- 0x03, /* __u8 ep_bmAttributes; Interrupt */
- 0x08, /* __le16 ep_wMaxPacketSize; 8 Bytes */
- 0x00,
- 0xff /* __u8 ep_bInterval; 255 ms */
-};
-
-static __u8 root_hub_hub_des[] =
-{
- 0x09, /* __u8 bLength; */
- 0x29, /* __u8 bDescriptorType; Hub-descriptor */
- 0x02, /* __u8 bNbrPorts; */
- 0x00, /* __u16 wHubCharacteristics; */
- 0x00,
- 0x01, /* __u8 bPwrOn2pwrGood; 2ms */
- 0x00, /* __u8 bHubContrCurrent; 0 mA */
- 0x00, /* __u8 DeviceRemovable; *** 7 Ports max *** */
- 0xff /* __u8 PortPwrCtrlMask; *** 7 ports max *** */
-};
-
-static DEFINE_TIMER(bulk_start_timer, NULL, 0, 0);
-static DEFINE_TIMER(bulk_eot_timer, NULL, 0, 0);
-
-/* We want the start timer to expire before the eot timer, because the former might start
- traffic, thus making it unnecessary for the latter to time out. */
-#define BULK_START_TIMER_INTERVAL (HZ/10) /* 100 ms */
-#define BULK_EOT_TIMER_INTERVAL (HZ/10+2) /* 120 ms */
-
-#define OK(x) len = (x); dbg_rh("OK(%d): line: %d", x, __LINE__); break
-#define CHECK_ALIGN(x) if (((__u32)(x)) & 0x00000003) \
-{panic("Alignment check (DWORD) failed at %s:%s:%d\n", __FILE__, __FUNCTION__, __LINE__);}
-
-#define SLAB_FLAG (in_interrupt() ? GFP_ATOMIC : GFP_KERNEL)
-#define KMALLOC_FLAG (in_interrupt() ? GFP_ATOMIC : GFP_KERNEL)
-
-/* Most helpful debugging aid */
-#define assert(expr) ((void) ((expr) ? 0 : (err("assert failed at line %d",__LINE__))))
-
-/* Alternative assert define which stops after a failed assert. */
-/*
-#define assert(expr) \
-{ \
- if (!(expr)) { \
- err("assert failed at line %d",__LINE__); \
- while (1); \
- } \
-}
-*/
-
-
-/* FIXME: Should RX_BUF_SIZE be a config option, or maybe we should adjust it dynamically?
- To adjust it dynamically we would have to get an interrupt when we reach the end
- of the rx descriptor list, or when we get close to the end, and then allocate more
- descriptors. */
-
-#define NBR_OF_RX_DESC 512
-#define RX_DESC_BUF_SIZE 1024
-#define RX_BUF_SIZE (NBR_OF_RX_DESC * RX_DESC_BUF_SIZE)
-
-/* The number of epids is, among other things, used for pre-allocating
- ctrl, bulk and isoc EP descriptors (one for each epid).
- Assumed to be > 1 when initiating the DMA lists. */
-#define NBR_OF_EPIDS 32
-
-/* Support interrupt traffic intervals up to 128 ms. */
-#define MAX_INTR_INTERVAL 128
-
-/* If periodic traffic (intr or isoc) is to be used, then one entry in the EP table
- must be "invalid". By this we mean that we shouldn't care about epid attentions
- for this epid, or at least handle them differently from epid attentions for "valid"
- epids. This define determines which one to use (don't change it). */
-#define INVALID_EPID 31
-/* A special epid for the bulk dummys. */
-#define DUMMY_EPID 30
-
-/* This is just a software cache for the valid entries in R_USB_EPT_DATA. */
-static __u32 epid_usage_bitmask;
-
-/* A bitfield to keep information on in/out traffic is needed to uniquely identify
- an endpoint on a device, since the most significant bit which indicates traffic
- direction is lacking in the ep_id field (ETRAX epids can handle both in and
- out traffic on endpoints that are otherwise identical). The USB framework, however,
- relies on them to be handled separately. For example, bulk IN and OUT urbs cannot
- be queued in the same list, since they would block each other. */
-static __u32 epid_out_traffic;
-
-/* DMA IN cache bug. Align the DMA IN buffers to 32 bytes, i.e. a cache line.
- Since RX_DESC_BUF_SIZE is 1024 is a multiple of 32, all rx buffers will be cache aligned. */
-static volatile unsigned char RxBuf[RX_BUF_SIZE] __attribute__ ((aligned (32)));
-static volatile USB_IN_Desc_t RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned (4)));
-
-/* Pointers into RxDescList. */
-static volatile USB_IN_Desc_t *myNextRxDesc;
-static volatile USB_IN_Desc_t *myLastRxDesc;
-static volatile USB_IN_Desc_t *myPrevRxDesc;
-
-/* EP descriptors must be 32-bit aligned. */
-static volatile USB_EP_Desc_t TxCtrlEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
-static volatile USB_EP_Desc_t TxBulkEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
-/* After each enabled bulk EP (IN or OUT) we put two disabled EP descriptors with the eol flag set,
- causing the DMA to stop the DMA channel. The first of these two has the intr flag set, which
- gives us a dma8_sub0_descr interrupt. When we receive this, we advance the DMA one step in the
- EP list and then restart the bulk channel, thus forcing a switch between bulk EP descriptors
- in each frame. */
-static volatile USB_EP_Desc_t TxBulkDummyEPList[NBR_OF_EPIDS][2] __attribute__ ((aligned (4)));
-
-static volatile USB_EP_Desc_t TxIsocEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
-static volatile USB_SB_Desc_t TxIsocSB_zout __attribute__ ((aligned (4)));
-
-static volatile USB_EP_Desc_t TxIntrEPList[MAX_INTR_INTERVAL] __attribute__ ((aligned (4)));
-static volatile USB_SB_Desc_t TxIntrSB_zout __attribute__ ((aligned (4)));
-
-/* A zout transfer makes a memory access at the address of its buf pointer, which means that setting
- this buf pointer to 0 will cause an access to the flash. In addition to this, setting sw_len to 0
- results in a 16/32 bytes (depending on DMA burst size) transfer. Instead, we set it to 1, and point
- it to this buffer. */
-static int zout_buffer[4] __attribute__ ((aligned (4)));
-
-/* Cache for allocating new EP and SB descriptors. */
-static struct kmem_cache *usb_desc_cache;
-
-/* Cache for the registers allocated in the top half. */
-static struct kmem_cache *top_half_reg_cache;
-
-/* Cache for the data allocated in the isoc descr top half. */
-static struct kmem_cache *isoc_compl_cache;
-
-static struct usb_bus *etrax_usb_bus;
-
-/* This is a circular (double-linked) list of the active urbs for each epid.
- The head is never removed, and new urbs are linked onto the list as
- urb_entry_t elements. Don't reference urb_list directly; use the wrapper
- functions instead. Note that working with these lists might require spinlock
- protection. */
-static struct list_head urb_list[NBR_OF_EPIDS];
-
-/* Read about the need and usage of this lock in submit_ctrl_urb. */
-static spinlock_t urb_list_lock;
-
-/* Used when unlinking asynchronously. */
-static struct list_head urb_unlink_list;
-
-/* for returning string descriptors in UTF-16LE */
-static int ascii2utf (char *ascii, __u8 *utf, int utfmax)
-{
- int retval;
-
- for (retval = 0; *ascii && utfmax > 1; utfmax -= 2, retval += 2) {
- *utf++ = *ascii++ & 0x7f;
- *utf++ = 0;
- }
- return retval;
-}
-
-static int usb_root_hub_string (int id, int serial, char *type, __u8 *data, int len)
-{
- char buf [30];
-
- // assert (len > (2 * (sizeof (buf) + 1)));
- // assert (strlen (type) <= 8);
-
- // language ids
- if (id == 0) {
- *data++ = 4; *data++ = 3; /* 4 bytes data */
- *data++ = 0; *data++ = 0; /* some language id */
- return 4;
-
- // serial number
- } else if (id == 1) {
- sprintf (buf, "%x", serial);
-
- // product description
- } else if (id == 2) {
- sprintf (buf, "USB %s Root Hub", type);
-
- // id 3 == vendor description
-
- // unsupported IDs --> "stall"
- } else
- return 0;
-
- data [0] = 2 + ascii2utf (buf, data + 2, len - 2);
- data [1] = 3;
- return data [0];
-}
-
-/* Wrappers around the list functions (include/linux/list.h). */
-
-static inline int urb_list_empty(int epid)
-{
- return list_empty(&urb_list[epid]);
-}
-
-/* Returns first urb for this epid, or NULL if list is empty. */
-static inline struct urb *urb_list_first(int epid)
-{
- struct urb *first_urb = 0;
-
- if (!urb_list_empty(epid)) {
- /* Get the first urb (i.e. head->next). */
- urb_entry_t *urb_entry = list_entry((&urb_list[epid])->next, urb_entry_t, list);
- first_urb = urb_entry->urb;
- }
- return first_urb;
-}
-
-/* Adds an urb_entry last in the list for this epid. */
-static inline void urb_list_add(struct urb *urb, int epid)
-{
- urb_entry_t *urb_entry = kmalloc(sizeof(urb_entry_t), KMALLOC_FLAG);
- assert(urb_entry);
-
- urb_entry->urb = urb;
- list_add_tail(&urb_entry->list, &urb_list[epid]);
-}
-
-/* Search through the list for an element that contains this urb. (The list
- is expected to be short and the one we are about to delete will often be
- the first in the list.) */
-static inline urb_entry_t *__urb_list_entry(struct urb *urb, int epid)
-{
- struct list_head *entry;
- struct list_head *tmp;
- urb_entry_t *urb_entry;
-
- list_for_each_safe(entry, tmp, &urb_list[epid]) {
- urb_entry = list_entry(entry, urb_entry_t, list);
- assert(urb_entry);
- assert(urb_entry->urb);
-
- if (urb_entry->urb == urb) {
- return urb_entry;
- }
- }
- return 0;
-}
-
-/* Delete an urb from the list. */
-static inline void urb_list_del(struct urb *urb, int epid)
-{
- urb_entry_t *urb_entry = __urb_list_entry(urb, epid);
- assert(urb_entry);
-
- /* Delete entry and free. */
- list_del(&urb_entry->list);
- kfree(urb_entry);
-}
-
-/* Move an urb to the end of the list. */
-static inline void urb_list_move_last(struct urb *urb, int epid)
-{
- urb_entry_t *urb_entry = __urb_list_entry(urb, epid);
- assert(urb_entry);
-
- list_move_tail(&urb_entry->list, &urb_list[epid]);
-}
-
-/* Get the next urb in the list. */
-static inline struct urb *urb_list_next(struct urb *urb, int epid)
-{
- urb_entry_t *urb_entry = __urb_list_entry(urb, epid);
-
- assert(urb_entry);
-
- if (urb_entry->list.next != &urb_list[epid]) {
- struct list_head *elem = urb_entry->list.next;
- urb_entry = list_entry(elem, urb_entry_t, list);
- return urb_entry->urb;
- } else {
- return NULL;
- }
-}
-
-
-
-/* For debug purposes only. */
-static inline void urb_list_dump(int epid)
-{
- struct list_head *entry;
- struct list_head *tmp;
- urb_entry_t *urb_entry;
- int i = 0;
-
- info("Dumping urb list for epid %d", epid);
-
- list_for_each_safe(entry, tmp, &urb_list[epid]) {
- urb_entry = list_entry(entry, urb_entry_t, list);
- info(" entry %d, urb = 0x%lx", i, (unsigned long)urb_entry->urb);
- }
-}
-
-static void init_rx_buffers(void);
-static int etrax_rh_unlink_urb(struct urb *urb);
-static void etrax_rh_send_irq(struct urb *urb);
-static void etrax_rh_init_int_timer(struct urb *urb);
-static void etrax_rh_int_timer_do(unsigned long ptr);
-
-static int etrax_usb_setup_epid(struct urb *urb);
-static int etrax_usb_lookup_epid(struct urb *urb);
-static int etrax_usb_allocate_epid(void);
-static void etrax_usb_free_epid(int epid);
-
-static int etrax_remove_from_sb_list(struct urb *urb);
-
-static void* etrax_usb_buffer_alloc(struct usb_bus* bus, size_t size,
- unsigned mem_flags, dma_addr_t *dma);
-static void etrax_usb_buffer_free(struct usb_bus *bus, size_t size, void *addr, dma_addr_t dma);
-
-static void etrax_usb_add_to_bulk_sb_list(struct urb *urb, int epid);
-static void etrax_usb_add_to_ctrl_sb_list(struct urb *urb, int epid);
-static void etrax_usb_add_to_intr_sb_list(struct urb *urb, int epid);
-static void etrax_usb_add_to_isoc_sb_list(struct urb *urb, int epid);
-
-static int etrax_usb_submit_bulk_urb(struct urb *urb);
-static int etrax_usb_submit_ctrl_urb(struct urb *urb);
-static int etrax_usb_submit_intr_urb(struct urb *urb);
-static int etrax_usb_submit_isoc_urb(struct urb *urb);
-
-static int etrax_usb_submit_urb(struct urb *urb, unsigned mem_flags);
-static int etrax_usb_unlink_urb(struct urb *urb, int status);
-static int etrax_usb_get_frame_number(struct usb_device *usb_dev);
-
-static irqreturn_t etrax_usb_tx_interrupt(int irq, void *vhc);
-static irqreturn_t etrax_usb_rx_interrupt(int irq, void *vhc);
-static irqreturn_t etrax_usb_hc_interrupt_top_half(int irq, void *vhc);
-static void etrax_usb_hc_interrupt_bottom_half(void *data);
-
-static void etrax_usb_isoc_descr_interrupt_bottom_half(void *data);
-
-
-/* The following is a list of interrupt handlers for the host controller interrupts we use.
- They are called from etrax_usb_hc_interrupt_bottom_half. */
-static void etrax_usb_hc_isoc_eof_interrupt(void);
-static void etrax_usb_hc_bulk_eot_interrupt(int timer_induced);
-static void etrax_usb_hc_epid_attn_interrupt(usb_interrupt_registers_t *reg);
-static void etrax_usb_hc_port_status_interrupt(usb_interrupt_registers_t *reg);
-static void etrax_usb_hc_ctl_status_interrupt(usb_interrupt_registers_t *reg);
-
-static int etrax_rh_submit_urb (struct urb *urb);
-
-/* Forward declaration needed because they are used in the rx interrupt routine. */
-static void etrax_usb_complete_urb(struct urb *urb, int status);
-static void etrax_usb_complete_bulk_urb(struct urb *urb, int status);
-static void etrax_usb_complete_ctrl_urb(struct urb *urb, int status);
-static void etrax_usb_complete_intr_urb(struct urb *urb, int status);
-static void etrax_usb_complete_isoc_urb(struct urb *urb, int status);
-
-static int etrax_usb_hc_init(void);
-static void etrax_usb_hc_cleanup(void);
-
-static struct usb_operations etrax_usb_device_operations =
-{
- .get_frame_number = etrax_usb_get_frame_number,
- .submit_urb = etrax_usb_submit_urb,
- .unlink_urb = etrax_usb_unlink_urb,
- .buffer_alloc = etrax_usb_buffer_alloc,
- .buffer_free = etrax_usb_buffer_free
-};
-
-/* Note that these functions are always available in their "__" variants, for use in
- error situations. The "__" missing variants are controlled by the USB_DEBUG_DESC/
- USB_DEBUG_URB macros. */
-static void __dump_urb(struct urb* purb)
-{
- printk("\nurb :0x%08lx\n", (unsigned long)purb);
- printk("dev :0x%08lx\n", (unsigned long)purb->dev);
- printk("pipe :0x%08x\n", purb->pipe);
- printk("status :%d\n", purb->status);
- printk("transfer_flags :0x%08x\n", purb->transfer_flags);
- printk("transfer_buffer :0x%08lx\n", (unsigned long)purb->transfer_buffer);
- printk("transfer_buffer_length:%d\n", purb->transfer_buffer_length);
- printk("actual_length :%d\n", purb->actual_length);
- printk("setup_packet :0x%08lx\n", (unsigned long)purb->setup_packet);
- printk("start_frame :%d\n", purb->start_frame);
- printk("number_of_packets :%d\n", purb->number_of_packets);
- printk("interval :%d\n", purb->interval);
- printk("error_count :%d\n", purb->error_count);
- printk("context :0x%08lx\n", (unsigned long)purb->context);
- printk("complete :0x%08lx\n\n", (unsigned long)purb->complete);
-}
-
-static void __dump_in_desc(volatile USB_IN_Desc_t *in)
-{
- printk("\nUSB_IN_Desc at 0x%08lx\n", (unsigned long)in);
- printk(" sw_len : 0x%04x (%d)\n", in->sw_len, in->sw_len);
- printk(" command : 0x%04x\n", in->command);
- printk(" next : 0x%08lx\n", in->next);
- printk(" buf : 0x%08lx\n", in->buf);
- printk(" hw_len : 0x%04x (%d)\n", in->hw_len, in->hw_len);
- printk(" status : 0x%04x\n\n", in->status);
-}
-
-static void __dump_sb_desc(volatile USB_SB_Desc_t *sb)
-{
- char tt = (sb->command & 0x30) >> 4;
- char *tt_string;
-
- switch (tt) {
- case 0:
- tt_string = "zout";
- break;
- case 1:
- tt_string = "in";
- break;
- case 2:
- tt_string = "out";
- break;
- case 3:
- tt_string = "setup";
- break;
- default:
- tt_string = "unknown (weird)";
- }
-
- printk("\n USB_SB_Desc at 0x%08lx\n", (unsigned long)sb);
- printk(" command : 0x%04x\n", sb->command);
- printk(" rem : %d\n", (sb->command & 0x3f00) >> 8);
- printk(" full : %d\n", (sb->command & 0x40) >> 6);
- printk(" tt : %d (%s)\n", tt, tt_string);
- printk(" intr : %d\n", (sb->command & 0x8) >> 3);
- printk(" eot : %d\n", (sb->command & 0x2) >> 1);
- printk(" eol : %d\n", sb->command & 0x1);
- printk(" sw_len : 0x%04x (%d)\n", sb->sw_len, sb->sw_len);
- printk(" next : 0x%08lx\n", sb->next);
- printk(" buf : 0x%08lx\n\n", sb->buf);
-}
-
-
-static void __dump_ep_desc(volatile USB_EP_Desc_t *ep)
-{
- printk("\nUSB_EP_Desc at 0x%08lx\n", (unsigned long)ep);
- printk(" command : 0x%04x\n", ep->command);
- printk(" ep_id : %d\n", (ep->command & 0x1f00) >> 8);
- printk(" enable : %d\n", (ep->command & 0x10) >> 4);
- printk(" intr : %d\n", (ep->command & 0x8) >> 3);
- printk(" eof : %d\n", (ep->command & 0x2) >> 1);
- printk(" eol : %d\n", ep->command & 0x1);
- printk(" hw_len : 0x%04x (%d)\n", ep->hw_len, ep->hw_len);
- printk(" next : 0x%08lx\n", ep->next);
- printk(" sub : 0x%08lx\n\n", ep->sub);
-}
-
-static inline void __dump_ep_list(int pipe_type)
-{
- volatile USB_EP_Desc_t *ep;
- volatile USB_EP_Desc_t *first_ep;
- volatile USB_SB_Desc_t *sb;
-
- switch (pipe_type)
- {
- case PIPE_BULK:
- first_ep = &TxBulkEPList[0];
- break;
- case PIPE_CONTROL:
- first_ep = &TxCtrlEPList[0];
- break;
- case PIPE_INTERRUPT:
- first_ep = &TxIntrEPList[0];
- break;
- case PIPE_ISOCHRONOUS:
- first_ep = &TxIsocEPList[0];
- break;
- default:
- warn("Cannot dump unknown traffic type");
- return;
- }
- ep = first_ep;
-
- printk("\n\nDumping EP list...\n\n");
-
- do {
- __dump_ep_desc(ep);
- /* Cannot phys_to_virt on 0 as it turns into 80000000, which is != 0. */
- sb = ep->sub ? phys_to_virt(ep->sub) : 0;
- while (sb) {
- __dump_sb_desc(sb);
- sb = sb->next ? phys_to_virt(sb->next) : 0;
- }
- ep = (volatile USB_EP_Desc_t *)(phys_to_virt(ep->next));
-
- } while (ep != first_ep);
-}
-
-static inline void __dump_ept_data(int epid)
-{
- unsigned long flags;
- __u32 r_usb_ept_data;
-
- if (epid < 0 || epid > 31) {
- printk("Cannot dump ept data for invalid epid %d\n", epid);
- return;
- }
-
- save_flags(flags);
- cli();
- *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
- nop();
- r_usb_ept_data = *R_USB_EPT_DATA;
- restore_flags(flags);
-
- printk("\nR_USB_EPT_DATA = 0x%x for epid %d :\n", r_usb_ept_data, epid);
- if (r_usb_ept_data == 0) {
- /* No need for more detailed printing. */
- return;
- }
- printk(" valid : %d\n", (r_usb_ept_data & 0x80000000) >> 31);
- printk(" hold : %d\n", (r_usb_ept_data & 0x40000000) >> 30);
- printk(" error_count_in : %d\n", (r_usb_ept_data & 0x30000000) >> 28);
- printk(" t_in : %d\n", (r_usb_ept_data & 0x08000000) >> 27);
- printk(" low_speed : %d\n", (r_usb_ept_data & 0x04000000) >> 26);
- printk(" port : %d\n", (r_usb_ept_data & 0x03000000) >> 24);
- printk(" error_code : %d\n", (r_usb_ept_data & 0x00c00000) >> 22);
- printk(" t_out : %d\n", (r_usb_ept_data & 0x00200000) >> 21);
- printk(" error_count_out : %d\n", (r_usb_ept_data & 0x00180000) >> 19);
- printk(" max_len : %d\n", (r_usb_ept_data & 0x0003f800) >> 11);
- printk(" ep : %d\n", (r_usb_ept_data & 0x00000780) >> 7);
- printk(" dev : %d\n", (r_usb_ept_data & 0x0000003f));
-}
-
-static inline void __dump_ept_data_list(void)
-{
- int i;
-
- printk("Dumping the whole R_USB_EPT_DATA list\n");
-
- for (i = 0; i < 32; i++) {
- __dump_ept_data(i);
- }
-}
-#ifdef USB_DEBUG_DESC
-#define dump_in_desc(...) __dump_in_desc(...)
-#define dump_sb_desc(...) __dump_sb_desc(...)
-#define dump_ep_desc(...) __dump_ep_desc(...)
-#else
-#define dump_in_desc(...) do {} while (0)
-#define dump_sb_desc(...) do {} while (0)
-#define dump_ep_desc(...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_URB
-#define dump_urb(x) __dump_urb(x)
-#else
-#define dump_urb(x) do {} while (0)
-#endif
-
-static void init_rx_buffers(void)
-{
- int i;
-
- DBFENTER;
-
- for (i = 0; i < (NBR_OF_RX_DESC - 1); i++) {
- RxDescList[i].sw_len = RX_DESC_BUF_SIZE;
- RxDescList[i].command = 0;
- RxDescList[i].next = virt_to_phys(&RxDescList[i + 1]);
- RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE));
- RxDescList[i].hw_len = 0;
- RxDescList[i].status = 0;
-
- /* DMA IN cache bug. (struct etrax_dma_descr has the same layout as USB_IN_Desc
- for the relevant fields.) */
- prepare_rx_descriptor((struct etrax_dma_descr*)&RxDescList[i]);
-
- }
-
- RxDescList[i].sw_len = RX_DESC_BUF_SIZE;
- RxDescList[i].command = IO_STATE(USB_IN_command, eol, yes);
- RxDescList[i].next = virt_to_phys(&RxDescList[0]);
- RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE));
- RxDescList[i].hw_len = 0;
- RxDescList[i].status = 0;
-
- myNextRxDesc = &RxDescList[0];
- myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1];
- myPrevRxDesc = &RxDescList[NBR_OF_RX_DESC - 1];
-
- *R_DMA_CH9_FIRST = virt_to_phys(myNextRxDesc);
- *R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, start);
-
- DBFEXIT;
-}
-
-static void init_tx_bulk_ep(void)
-{
- int i;
-
- DBFENTER;
-
- for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
- CHECK_ALIGN(&TxBulkEPList[i]);
- TxBulkEPList[i].hw_len = 0;
- TxBulkEPList[i].command = IO_FIELD(USB_EP_command, epid, i);
- TxBulkEPList[i].sub = 0;
- TxBulkEPList[i].next = virt_to_phys(&TxBulkEPList[i + 1]);
-
- /* Initiate two EPs, disabled and with the eol flag set. No need for any
- preserved epid. */
-
- /* The first one has the intr flag set so we get an interrupt when the DMA
- channel is about to become disabled. */
- CHECK_ALIGN(&TxBulkDummyEPList[i][0]);
- TxBulkDummyEPList[i][0].hw_len = 0;
- TxBulkDummyEPList[i][0].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) |
- IO_STATE(USB_EP_command, eol, yes) |
- IO_STATE(USB_EP_command, intr, yes));
- TxBulkDummyEPList[i][0].sub = 0;
- TxBulkDummyEPList[i][0].next = virt_to_phys(&TxBulkDummyEPList[i][1]);
-
- /* The second one. */
- CHECK_ALIGN(&TxBulkDummyEPList[i][1]);
- TxBulkDummyEPList[i][1].hw_len = 0;
- TxBulkDummyEPList[i][1].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) |
- IO_STATE(USB_EP_command, eol, yes));
- TxBulkDummyEPList[i][1].sub = 0;
- /* The last dummy's next pointer is the same as the current EP's next pointer. */
- TxBulkDummyEPList[i][1].next = virt_to_phys(&TxBulkEPList[i + 1]);
- }
-
- /* Configure the last one. */
- CHECK_ALIGN(&TxBulkEPList[i]);
- TxBulkEPList[i].hw_len = 0;
- TxBulkEPList[i].command = (IO_STATE(USB_EP_command, eol, yes) |
- IO_FIELD(USB_EP_command, epid, i));
- TxBulkEPList[i].sub = 0;
- TxBulkEPList[i].next = virt_to_phys(&TxBulkEPList[0]);
-
- /* No need configuring dummy EPs for the last one as it will never be used for
- bulk traffic (i == INVALD_EPID at this point). */
-
- /* Set up to start on the last EP so we will enable it when inserting traffic
- for the first time (imitating the situation where the DMA has stopped
- because there was no more traffic). */
- *R_DMA_CH8_SUB0_EP = virt_to_phys(&TxBulkEPList[i]);
- /* No point in starting the bulk channel yet.
- *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); */
- DBFEXIT;
-}
-
-static void init_tx_ctrl_ep(void)
-{
- int i;
-
- DBFENTER;
-
- for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
- CHECK_ALIGN(&TxCtrlEPList[i]);
- TxCtrlEPList[i].hw_len = 0;
- TxCtrlEPList[i].command = IO_FIELD(USB_EP_command, epid, i);
- TxCtrlEPList[i].sub = 0;
- TxCtrlEPList[i].next = virt_to_phys(&TxCtrlEPList[i + 1]);
- }
-
- CHECK_ALIGN(&TxCtrlEPList[i]);
- TxCtrlEPList[i].hw_len = 0;
- TxCtrlEPList[i].command = (IO_STATE(USB_EP_command, eol, yes) |
- IO_FIELD(USB_EP_command, epid, i));
-
- TxCtrlEPList[i].sub = 0;
- TxCtrlEPList[i].next = virt_to_phys(&TxCtrlEPList[0]);
-
- *R_DMA_CH8_SUB1_EP = virt_to_phys(&TxCtrlEPList[0]);
- *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB1_CMD, cmd, start);
-
- DBFEXIT;
-}
-
-
-static void init_tx_intr_ep(void)
-{
- int i;
-
- DBFENTER;
-
- /* Read comment at zout_buffer declaration for an explanation to this. */
- TxIntrSB_zout.sw_len = 1;
- TxIntrSB_zout.next = 0;
- TxIntrSB_zout.buf = virt_to_phys(&zout_buffer[0]);
- TxIntrSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) |
- IO_STATE(USB_SB_command, tt, zout) |
- IO_STATE(USB_SB_command, full, yes) |
- IO_STATE(USB_SB_command, eot, yes) |
- IO_STATE(USB_SB_command, eol, yes));
-
- for (i = 0; i < (MAX_INTR_INTERVAL - 1); i++) {
- CHECK_ALIGN(&TxIntrEPList[i]);
- TxIntrEPList[i].hw_len = 0;
- TxIntrEPList[i].command =
- (IO_STATE(USB_EP_command, eof, yes) |
- IO_STATE(USB_EP_command, enable, yes) |
- IO_FIELD(USB_EP_command, epid, INVALID_EPID));
- TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout);
- TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[i + 1]);
- }
-
- CHECK_ALIGN(&TxIntrEPList[i]);
- TxIntrEPList[i].hw_len = 0;
- TxIntrEPList[i].command =
- (IO_STATE(USB_EP_command, eof, yes) |
- IO_STATE(USB_EP_command, eol, yes) |
- IO_STATE(USB_EP_command, enable, yes) |
- IO_FIELD(USB_EP_command, epid, INVALID_EPID));
- TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout);
- TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[0]);
-
- *R_DMA_CH8_SUB2_EP = virt_to_phys(&TxIntrEPList[0]);
- *R_DMA_CH8_SUB2_CMD = IO_STATE(R_DMA_CH8_SUB2_CMD, cmd, start);
- DBFEXIT;
-}
-
-static void init_tx_isoc_ep(void)
-{
- int i;
-
- DBFENTER;
-
- /* Read comment at zout_buffer declaration for an explanation to this. */
- TxIsocSB_zout.sw_len = 1;
- TxIsocSB_zout.next = 0;
- TxIsocSB_zout.buf = virt_to_phys(&zout_buffer[0]);
- TxIsocSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) |
- IO_STATE(USB_SB_command, tt, zout) |
- IO_STATE(USB_SB_command, full, yes) |
- IO_STATE(USB_SB_command, eot, yes) |
- IO_STATE(USB_SB_command, eol, yes));
-
- /* The last isochronous EP descriptor is a dummy. */
-
- for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
- CHECK_ALIGN(&TxIsocEPList[i]);
- TxIsocEPList[i].hw_len = 0;
- TxIsocEPList[i].command = IO_FIELD(USB_EP_command, epid, i);
- TxIsocEPList[i].sub = 0;
- TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[i + 1]);
- }
-
- CHECK_ALIGN(&TxIsocEPList[i]);
- TxIsocEPList[i].hw_len = 0;
-
- /* Must enable the last EP descr to get eof interrupt. */
- TxIsocEPList[i].command = (IO_STATE(USB_EP_command, enable, yes) |
- IO_STATE(USB_EP_command, eof, yes) |
- IO_STATE(USB_EP_command, eol, yes) |
- IO_FIELD(USB_EP_command, epid, INVALID_EPID));
- TxIsocEPList[i].sub = virt_to_phys(&TxIsocSB_zout);
- TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[0]);
-
- *R_DMA_CH8_SUB3_EP = virt_to_phys(&TxIsocEPList[0]);
- *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start);
-
- DBFEXIT;
-}
-
-static void etrax_usb_unlink_intr_urb(struct urb *urb)
-{
- volatile USB_EP_Desc_t *first_ep; /* First EP in the list. */
- volatile USB_EP_Desc_t *curr_ep; /* Current EP, the iterator. */
- volatile USB_EP_Desc_t *next_ep; /* The EP after current. */
- volatile USB_EP_Desc_t *unlink_ep; /* The one we should remove from the list. */
-
- int epid;
-
- /* Read 8.8.4 in Designer's Reference, "Removing an EP Descriptor from the List". */
-
- DBFENTER;
-
- epid = ((etrax_urb_priv_t *)urb->hcpriv)->epid;
-
- first_ep = &TxIntrEPList[0];
- curr_ep = first_ep;
-
-
- /* Note that this loop removes all EP descriptors with this epid. This assumes
- that all EP descriptors belong to the one and only urb for this epid. */
-
- do {
- next_ep = (USB_EP_Desc_t *)phys_to_virt(curr_ep->next);
-
- if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
-
- dbg_intr("Found EP to unlink for epid %d", epid);
-
- /* This is the one we should unlink. */
- unlink_ep = next_ep;
-
- /* Actually unlink the EP from the DMA list. */
- curr_ep->next = unlink_ep->next;
-
- /* Wait until the DMA is no longer at this descriptor. */
- while (*R_DMA_CH8_SUB2_EP == virt_to_phys(unlink_ep));
-
- /* Now we are free to remove it and its SB descriptor.
- Note that it is assumed here that there is only one sb in the
- sb list for this ep. */
- kmem_cache_free(usb_desc_cache, phys_to_virt(unlink_ep->sub));
- kmem_cache_free(usb_desc_cache, (USB_EP_Desc_t *)unlink_ep);
- }
-
- curr_ep = phys_to_virt(curr_ep->next);
-
- } while (curr_ep != first_ep);
- urb->hcpriv = NULL;
-}
-
-void etrax_usb_do_intr_recover(int epid)
-{
- USB_EP_Desc_t *first_ep, *tmp_ep;
-
- DBFENTER;
-
- first_ep = (USB_EP_Desc_t *)phys_to_virt(*R_DMA_CH8_SUB2_EP);
- tmp_ep = first_ep;
-
- /* What this does is simply to walk the list of interrupt
- ep descriptors and enable those that are disabled. */
-
- do {
- if (IO_EXTRACT(USB_EP_command, epid, tmp_ep->command) == epid &&
- !(tmp_ep->command & IO_MASK(USB_EP_command, enable))) {
- tmp_ep->command |= IO_STATE(USB_EP_command, enable, yes);
- }
-
- tmp_ep = (USB_EP_Desc_t *)phys_to_virt(tmp_ep->next);
-
- } while (tmp_ep != first_ep);
-
-
- DBFEXIT;
-}
-
-static int etrax_rh_unlink_urb (struct urb *urb)
-{
- etrax_hc_t *hc;
-
- DBFENTER;
-
- hc = urb->dev->bus->hcpriv;
-
- if (hc->rh.urb == urb) {
- hc->rh.send = 0;
- del_timer(&hc->rh.rh_int_timer);
- }
-
- DBFEXIT;
- return 0;
-}
-
-static void etrax_rh_send_irq(struct urb *urb)
-{
- __u16 data = 0;
- etrax_hc_t *hc = urb->dev->bus->hcpriv;
- DBFENTER;
-
-/*
- dbg_rh("R_USB_FM_NUMBER : 0x%08X", *R_USB_FM_NUMBER);
- dbg_rh("R_USB_FM_REMAINING: 0x%08X", *R_USB_FM_REMAINING);
-*/
-
- data |= (hc->rh.wPortChange_1) ? (1 << 1) : 0;
- data |= (hc->rh.wPortChange_2) ? (1 << 2) : 0;
-
- *((__u16 *)urb->transfer_buffer) = cpu_to_le16(data);
- /* FIXME: Why is actual_length set to 1 when data is 2 bytes?
- Since only 1 byte is used, why not declare data as __u8? */
- urb->actual_length = 1;
- urb->status = 0;
-
- if (hc->rh.send && urb->complete) {
- dbg_rh("wPortChange_1: 0x%04X", hc->rh.wPortChange_1);
- dbg_rh("wPortChange_2: 0x%04X", hc->rh.wPortChange_2);
-
- urb->complete(urb, NULL);
- }
-
- DBFEXIT;
-}
-
-static void etrax_rh_init_int_timer(struct urb *urb)
-{
- etrax_hc_t *hc;
-
- DBFENTER;
-
- hc = urb->dev->bus->hcpriv;
- hc->rh.interval = urb->interval;
- init_timer(&hc->rh.rh_int_timer);
- hc->rh.rh_int_timer.function = etrax_rh_int_timer_do;
- hc->rh.rh_int_timer.data = (unsigned long)urb;
- /* FIXME: Is the jiffies resolution enough? All intervals < 10 ms will be mapped
- to 0, and the rest to the nearest lower 10 ms. */
- hc->rh.rh_int_timer.expires = jiffies + ((HZ * hc->rh.interval) / 1000);
- add_timer(&hc->rh.rh_int_timer);
-
- DBFEXIT;
-}
-
-static void etrax_rh_int_timer_do(unsigned long ptr)
-{
- struct urb *urb;
- etrax_hc_t *hc;
-
- DBFENTER;
-
- urb = (struct urb*)ptr;
- hc = urb->dev->bus->hcpriv;
-
- if (hc->rh.send) {
- etrax_rh_send_irq(urb);
- }
-
- DBFEXIT;
-}
-
-static int etrax_usb_setup_epid(struct urb *urb)
-{
- int epid;
- char devnum, endpoint, out_traffic, slow;
- int maxlen;
- unsigned long flags;
-
- DBFENTER;
-
- epid = etrax_usb_lookup_epid(urb);
- if ((epid != -1)){
- /* An epid that fits this urb has been found. */
- DBFEXIT;
- return epid;
- }
-
- /* We must find and initiate a new epid for this urb. */
- epid = etrax_usb_allocate_epid();
-
- if (epid == -1) {
- /* Failed to allocate a new epid. */
- DBFEXIT;
- return epid;
- }
-
- /* We now have a new epid to use. Initiate it. */
- set_bit(epid, (void *)&epid_usage_bitmask);
-
- devnum = usb_pipedevice(urb->pipe);
- endpoint = usb_pipeendpoint(urb->pipe);
- slow = usb_pipeslow(urb->pipe);
- maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
- if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
- /* We want both IN and OUT control traffic to be put on the same EP/SB list. */
- out_traffic = 1;
- } else {
- out_traffic = usb_pipeout(urb->pipe);
- }
-
- save_flags(flags);
- cli();
-
- *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
- nop();
-
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
- *R_USB_EPT_DATA_ISO = IO_STATE(R_USB_EPT_DATA_ISO, valid, yes) |
- /* FIXME: Change any to the actual port? */
- IO_STATE(R_USB_EPT_DATA_ISO, port, any) |
- IO_FIELD(R_USB_EPT_DATA_ISO, max_len, maxlen) |
- IO_FIELD(R_USB_EPT_DATA_ISO, ep, endpoint) |
- IO_FIELD(R_USB_EPT_DATA_ISO, dev, devnum);
- } else {
- *R_USB_EPT_DATA = IO_STATE(R_USB_EPT_DATA, valid, yes) |
- IO_FIELD(R_USB_EPT_DATA, low_speed, slow) |
- /* FIXME: Change any to the actual port? */
- IO_STATE(R_USB_EPT_DATA, port, any) |
- IO_FIELD(R_USB_EPT_DATA, max_len, maxlen) |
- IO_FIELD(R_USB_EPT_DATA, ep, endpoint) |
- IO_FIELD(R_USB_EPT_DATA, dev, devnum);
- }
-
- restore_flags(flags);
-
- if (out_traffic) {
- set_bit(epid, (void *)&epid_out_traffic);
- } else {
- clear_bit(epid, (void *)&epid_out_traffic);
- }
-
- dbg_epid("Setting up epid %d with devnum %d, endpoint %d and max_len %d (%s)",
- epid, devnum, endpoint, maxlen, out_traffic ? "OUT" : "IN");
-
- DBFEXIT;
- return epid;
-}
-
-static void etrax_usb_free_epid(int epid)
-{
- unsigned long flags;
-
- DBFENTER;
-
- if (!test_bit(epid, (void *)&epid_usage_bitmask)) {
- warn("Trying to free unused epid %d", epid);
- DBFEXIT;
- return;
- }
-
- save_flags(flags);
- cli();
-
- *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
- nop();
- while (*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold));
- /* This will, among other things, set the valid field to 0. */
- *R_USB_EPT_DATA = 0;
- restore_flags(flags);
-
- clear_bit(epid, (void *)&epid_usage_bitmask);
-
-
- dbg_epid("Freed epid %d", epid);
-
- DBFEXIT;
-}
-
-static int etrax_usb_lookup_epid(struct urb *urb)
-{
- int i;
- __u32 data;
- char devnum, endpoint, slow, out_traffic;
- int maxlen;
- unsigned long flags;
-
- DBFENTER;
-
- devnum = usb_pipedevice(urb->pipe);
- endpoint = usb_pipeendpoint(urb->pipe);
- slow = usb_pipeslow(urb->pipe);
- maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
- if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
- /* We want both IN and OUT control traffic to be put on the same EP/SB list. */
- out_traffic = 1;
- } else {
- out_traffic = usb_pipeout(urb->pipe);
- }
-
- /* Step through att epids. */
- for (i = 0; i < NBR_OF_EPIDS; i++) {
- if (test_bit(i, (void *)&epid_usage_bitmask) &&
- test_bit(i, (void *)&epid_out_traffic) == out_traffic) {
-
- save_flags(flags);
- cli();
- *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, i);
- nop();
-
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
- data = *R_USB_EPT_DATA_ISO;
- restore_flags(flags);
-
- if ((IO_MASK(R_USB_EPT_DATA_ISO, valid) & data) &&
- (IO_EXTRACT(R_USB_EPT_DATA_ISO, dev, data) == devnum) &&
- (IO_EXTRACT(R_USB_EPT_DATA_ISO, ep, data) == endpoint) &&
- (IO_EXTRACT(R_USB_EPT_DATA_ISO, max_len, data) == maxlen)) {
- dbg_epid("Found epid %d for devnum %d, endpoint %d (%s)",
- i, devnum, endpoint, out_traffic ? "OUT" : "IN");
- DBFEXIT;
- return i;
- }
- } else {
- data = *R_USB_EPT_DATA;
- restore_flags(flags);
-
- if ((IO_MASK(R_USB_EPT_DATA, valid) & data) &&
- (IO_EXTRACT(R_USB_EPT_DATA, dev, data) == devnum) &&
- (IO_EXTRACT(R_USB_EPT_DATA, ep, data) == endpoint) &&
- (IO_EXTRACT(R_USB_EPT_DATA, low_speed, data) == slow) &&
- (IO_EXTRACT(R_USB_EPT_DATA, max_len, data) == maxlen)) {
- dbg_epid("Found epid %d for devnum %d, endpoint %d (%s)",
- i, devnum, endpoint, out_traffic ? "OUT" : "IN");
- DBFEXIT;
- return i;
- }
- }
- }
- }
-
- DBFEXIT;
- return -1;
-}
-
-static int etrax_usb_allocate_epid(void)
-{
- int i;
-
- DBFENTER;
-
- for (i = 0; i < NBR_OF_EPIDS; i++) {
- if (!test_bit(i, (void *)&epid_usage_bitmask)) {
- dbg_epid("Found free epid %d", i);
- DBFEXIT;
- return i;
- }
- }
-
- dbg_epid("Found no free epids");
- DBFEXIT;
- return -1;
-}
-
-static int etrax_usb_submit_urb(struct urb *urb, unsigned mem_flags)
-{
- etrax_hc_t *hc;
- int ret = -EINVAL;
-
- DBFENTER;
-
- if (!urb->dev || !urb->dev->bus) {
- return -ENODEV;
- }
- if (usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)) <= 0) {
- info("Submit urb to pipe with maxpacketlen 0, pipe 0x%X\n", urb->pipe);
- return -EMSGSIZE;
- }
-
- if (urb->timeout) {
- /* FIXME. */
- warn("urb->timeout specified, ignoring.");
- }
-
- hc = (etrax_hc_t*)urb->dev->bus->hcpriv;
-
- if (usb_pipedevice(urb->pipe) == hc->rh.devnum) {
- /* This request is for the Virtual Root Hub. */
- ret = etrax_rh_submit_urb(urb);
-
- } else if (usb_pipetype(urb->pipe) == PIPE_BULK) {
-
- ret = etrax_usb_submit_bulk_urb(urb);
-
- } else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
-
- ret = etrax_usb_submit_ctrl_urb(urb);
-
- } else if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
- int bustime;
-
- if (urb->bandwidth == 0) {
- bustime = usb_check_bandwidth(urb->dev, urb);
- if (bustime < 0) {
- ret = bustime;
- } else {
- ret = etrax_usb_submit_intr_urb(urb);
- if (ret == 0)
- usb_claim_bandwidth(urb->dev, urb, bustime, 0);
- }
- } else {
- /* Bandwidth already set. */
- ret = etrax_usb_submit_intr_urb(urb);
- }
-
- } else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
- int bustime;
-
- if (urb->bandwidth == 0) {
- bustime = usb_check_bandwidth(urb->dev, urb);
- if (bustime < 0) {
- ret = bustime;
- } else {
- ret = etrax_usb_submit_isoc_urb(urb);
- if (ret == 0)
- usb_claim_bandwidth(urb->dev, urb, bustime, 0);
- }
- } else {
- /* Bandwidth already set. */
- ret = etrax_usb_submit_isoc_urb(urb);
- }
- }
-
- DBFEXIT;
-
- if (ret != 0)
- printk("Submit URB error %d\n", ret);
-
- return ret;
-}
-
-static int etrax_usb_unlink_urb(struct urb *urb, int status)
-{
- etrax_hc_t *hc;
- etrax_urb_priv_t *urb_priv;
- int epid;
- unsigned int flags;
-
- DBFENTER;
-
- if (!urb) {
- return -EINVAL;
- }
-
- /* Disable interrupts here since a descriptor interrupt for the isoc epid
- will modify the sb list. This could possibly be done more granular, but
- unlink_urb should not be used frequently anyway.
- */
-
- save_flags(flags);
- cli();
-
- if (!urb->dev || !urb->dev->bus) {
- restore_flags(flags);
- return -ENODEV;
- }
- if (!urb->hcpriv) {
- /* This happens if a device driver calls unlink on an urb that
- was never submitted (lazy driver) or if the urb was completed
- while unlink was being called. */
- restore_flags(flags);
- return 0;
- }
- if (urb->transfer_flags & URB_ASYNC_UNLINK) {
- /* FIXME. */
- /* If URB_ASYNC_UNLINK is set:
- unlink
- move to a separate urb list
- call complete at next sof with ECONNRESET
-
- If not:
- wait 1 ms
- unlink
- call complete with ENOENT
- */
- warn("URB_ASYNC_UNLINK set, ignoring.");
- }
-
- /* One might think that urb->status = -EINPROGRESS would be a requirement for unlinking,
- but that doesn't work for interrupt and isochronous traffic since they are completed
- repeatedly, and urb->status is set then. That may in itself be a bug though. */
-
- hc = urb->dev->bus->hcpriv;
- urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
- epid = urb_priv->epid;
-
- /* Set the urb status (synchronous unlink). */
- urb->status = -ENOENT;
- urb_priv->urb_state = UNLINK;
-
- if (usb_pipedevice(urb->pipe) == hc->rh.devnum) {
- int ret;
- ret = etrax_rh_unlink_urb(urb);
- DBFEXIT;
- restore_flags(flags);
- return ret;
-
- } else if (usb_pipetype(urb->pipe) == PIPE_BULK) {
-
- dbg_bulk("Unlink of bulk urb (0x%lx)", (unsigned long)urb);
-
- if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
- /* The EP was enabled, disable it and wait. */
- TxBulkEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-
- /* Ah, the luxury of busy-wait. */
- while (*R_DMA_CH8_SUB0_EP == virt_to_phys(&TxBulkEPList[epid]));
- }
- /* Kicking dummy list out of the party. */
- TxBulkEPList[epid].next = virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]);
-
- } else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
-
- dbg_ctrl("Unlink of ctrl urb (0x%lx)", (unsigned long)urb);
-
- if (TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
- /* The EP was enabled, disable it and wait. */
- TxCtrlEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-
- /* Ah, the luxury of busy-wait. */
- while (*R_DMA_CH8_SUB1_EP == virt_to_phys(&TxCtrlEPList[epid]));
- }
-
- } else if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
-
- dbg_intr("Unlink of intr urb (0x%lx)", (unsigned long)urb);
-
- /* Separate function because it's a tad more complicated. */
- etrax_usb_unlink_intr_urb(urb);
-
- } else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-
- dbg_isoc("Unlink of isoc urb (0x%lx)", (unsigned long)urb);
-
- if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
- /* The EP was enabled, disable it and wait. */
- TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-
- /* Ah, the luxury of busy-wait. */
- while (*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid]));
- }
- }
-
- /* Note that we need to remove the urb from the urb list *before* removing its SB
- descriptors. (This means that the isoc eof handler might get a null urb when we
- are unlinking the last urb.) */
-
- if (usb_pipetype(urb->pipe) == PIPE_BULK) {
-
- urb_list_del(urb, epid);
- TxBulkEPList[epid].sub = 0;
- etrax_remove_from_sb_list(urb);
-
- } else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
-
- urb_list_del(urb, epid);
- TxCtrlEPList[epid].sub = 0;
- etrax_remove_from_sb_list(urb);
-
- } else if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
-
- urb_list_del(urb, epid);
- /* Sanity check (should never happen). */
- assert(urb_list_empty(epid));
-
- /* Release allocated bandwidth. */
- usb_release_bandwidth(urb->dev, urb, 0);
-
- } else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-
- if (usb_pipeout(urb->pipe)) {
-
- USB_SB_Desc_t *iter_sb, *prev_sb, *next_sb;
-
- if (__urb_list_entry(urb, epid)) {
-
- urb_list_del(urb, epid);
- iter_sb = TxIsocEPList[epid].sub ? phys_to_virt(TxIsocEPList[epid].sub) : 0;
- prev_sb = 0;
- while (iter_sb && (iter_sb != urb_priv->first_sb)) {
- prev_sb = iter_sb;
- iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
- }
-
- if (iter_sb == 0) {
- /* Unlink of the URB currently being transmitted. */
- prev_sb = 0;
- iter_sb = TxIsocEPList[epid].sub ? phys_to_virt(TxIsocEPList[epid].sub) : 0;
- }
-
- while (iter_sb && (iter_sb != urb_priv->last_sb)) {
- iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
- }
- if (iter_sb) {
- next_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
- } else {
- /* This should only happen if the DMA has completed
- processing the SB list for this EP while interrupts
- are disabled. */
- dbg_isoc("Isoc urb not found, already sent?");
- next_sb = 0;
- }
- if (prev_sb) {
- prev_sb->next = next_sb ? virt_to_phys(next_sb) : 0;
- } else {
- TxIsocEPList[epid].sub = next_sb ? virt_to_phys(next_sb) : 0;
- }
-
- etrax_remove_from_sb_list(urb);
- if (urb_list_empty(epid)) {
- TxIsocEPList[epid].sub = 0;
- dbg_isoc("Last isoc out urb epid %d", epid);
- } else if (next_sb || prev_sb) {
- dbg_isoc("Re-enable isoc out epid %d", epid);
-
- TxIsocEPList[epid].hw_len = 0;
- TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
- } else {
- TxIsocEPList[epid].sub = 0;
- dbg_isoc("URB list non-empty and no SB list, EP disabled");
- }
- } else {
- dbg_isoc("Urb 0x%p not found, completed already?", urb);
- }
- } else {
-
- urb_list_del(urb, epid);
-
- /* For in traffic there is only one SB descriptor for each EP even
- though there may be several urbs (all urbs point at the same SB). */
- if (urb_list_empty(epid)) {
- /* No more urbs, remove the SB. */
- TxIsocEPList[epid].sub = 0;
- etrax_remove_from_sb_list(urb);
- } else {
- TxIsocEPList[epid].hw_len = 0;
- TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
- }
- }
- /* Release allocated bandwidth. */
- usb_release_bandwidth(urb->dev, urb, 1);
- }
- /* Free the epid if urb list is empty. */
- if (urb_list_empty(epid)) {
- etrax_usb_free_epid(epid);
- }
- restore_flags(flags);
-
- /* Must be done before calling completion handler. */
- kfree(urb_priv);
- urb->hcpriv = 0;
-
- if (urb->complete) {
- urb->complete(urb, NULL);
- }
-
- DBFEXIT;
- return 0;
-}
-
-static int etrax_usb_get_frame_number(struct usb_device *usb_dev)
-{
- DBFENTER;
- DBFEXIT;
- return (*R_USB_FM_NUMBER & 0x7ff);
-}
-
-static irqreturn_t etrax_usb_tx_interrupt(int irq, void *vhc)
-{
- DBFENTER;
-
- /* This interrupt handler could be used when unlinking EP descriptors. */
-
- if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub0_descr)) {
- USB_EP_Desc_t *ep;
-
- //dbg_bulk("dma8_sub0_descr (BULK) intr.");
-
- /* It should be safe clearing the interrupt here, since we don't expect to get a new
- one until we restart the bulk channel. */
- *R_DMA_CH8_SUB0_CLR_INTR = IO_STATE(R_DMA_CH8_SUB0_CLR_INTR, clr_descr, do);
-
- /* Wait while the DMA is running (though we don't expect it to be). */
- while (*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd));
-
- /* Advance the DMA to the next EP descriptor. */
- ep = (USB_EP_Desc_t *)phys_to_virt(*R_DMA_CH8_SUB0_EP);
-
- //dbg_bulk("descr intr: DMA is at 0x%lx", (unsigned long)ep);
-
- /* ep->next is already a physical address; no need for a virt_to_phys. */
- *R_DMA_CH8_SUB0_EP = ep->next;
-
- /* Start the DMA bulk channel again. */
- *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start);
- }
- if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub1_descr)) {
- struct urb *urb;
- int epid;
- etrax_urb_priv_t *urb_priv;
- unsigned long int flags;
-
- dbg_ctrl("dma8_sub1_descr (CTRL) intr.");
- *R_DMA_CH8_SUB1_CLR_INTR = IO_STATE(R_DMA_CH8_SUB1_CLR_INTR, clr_descr, do);
-
- /* The complete callback gets called so we cli. */
- save_flags(flags);
- cli();
-
- for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
- if ((TxCtrlEPList[epid].sub == 0) ||
- (epid == DUMMY_EPID) ||
- (epid == INVALID_EPID)) {
- /* Nothing here to see. */
- continue;
- }
-
- /* Get the first urb (if any). */
- urb = urb_list_first(epid);
-
- if (urb) {
-
- /* Sanity check. */
- assert(usb_pipetype(urb->pipe) == PIPE_CONTROL);
-
- urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
- assert(urb_priv);
-
- if (urb_priv->urb_state == WAITING_FOR_DESCR_INTR) {
- assert(!(TxCtrlEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable)));
-
- etrax_usb_complete_urb(urb, 0);
- }
- }
- }
- restore_flags(flags);
- }
- if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub2_descr)) {
- dbg_intr("dma8_sub2_descr (INTR) intr.");
- *R_DMA_CH8_SUB2_CLR_INTR = IO_STATE(R_DMA_CH8_SUB2_CLR_INTR, clr_descr, do);
- }
- if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub3_descr)) {
- struct urb *urb;
- int epid;
- int epid_done;
- etrax_urb_priv_t *urb_priv;
- USB_SB_Desc_t *sb_desc;
-
- usb_isoc_complete_data_t *comp_data = NULL;
-
- /* One or more isoc out transfers are done. */
- dbg_isoc("dma8_sub3_descr (ISOC) intr.");
-
- /* For each isoc out EP search for the first sb_desc with the intr flag
- set. This descriptor must be the last packet from an URB. Then
- traverse the URB list for the EP until the URB with urb_priv->last_sb
- matching the intr-marked sb_desc is found. All URBs before this have
- been sent.
- */
-
- for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
- /* Skip past epids with no SB lists, epids used for in traffic,
- and special (dummy, invalid) epids. */
- if ((TxIsocEPList[epid].sub == 0) ||
- (test_bit(epid, (void *)&epid_out_traffic) == 0) ||
- (epid == DUMMY_EPID) ||
- (epid == INVALID_EPID)) {
- /* Nothing here to see. */
- continue;
- }
- sb_desc = phys_to_virt(TxIsocEPList[epid].sub);
-
- /* Find the last descriptor of the currently active URB for this ep.
- This is the first descriptor in the sub list marked for a descriptor
- interrupt. */
- while (sb_desc && !IO_EXTRACT(USB_SB_command, intr, sb_desc->command)) {
- sb_desc = sb_desc->next ? phys_to_virt(sb_desc->next) : 0;
- }
- assert(sb_desc);
-
- dbg_isoc("Check epid %d, sub 0x%p, SB 0x%p",
- epid,
- phys_to_virt(TxIsocEPList[epid].sub),
- sb_desc);
-
- epid_done = 0;
-
- /* Get the first urb (if any). */
- urb = urb_list_first(epid);
- assert(urb);
-
- while (urb && !epid_done) {
-
- /* Sanity check. */
- assert(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
-
- if (!usb_pipeout(urb->pipe)) {
- /* descr interrupts are generated only for out pipes. */
- epid_done = 1;
- continue;
- }
-
- urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
- assert(urb_priv);
-
- if (sb_desc != urb_priv->last_sb) {
-
- /* This urb has been sent. */
- dbg_isoc("out URB 0x%p sent", urb);
-
- urb_priv->urb_state = TRANSFER_DONE;
-
- } else if ((sb_desc == urb_priv->last_sb) &&
- !(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) {
-
- assert((sb_desc->command & IO_MASK(USB_SB_command, eol)) == IO_STATE(USB_SB_command, eol, yes));
- assert(sb_desc->next == 0);
-
- dbg_isoc("out URB 0x%p last in list, epid disabled", urb);
- TxIsocEPList[epid].sub = 0;
- TxIsocEPList[epid].hw_len = 0;
- urb_priv->urb_state = TRANSFER_DONE;
-
- epid_done = 1;
-
- } else {
- epid_done = 1;
- }
- if (!epid_done) {
- urb = urb_list_next(urb, epid);
- }
- }
-
- }
-
- *R_DMA_CH8_SUB3_CLR_INTR = IO_STATE(R_DMA_CH8_SUB3_CLR_INTR, clr_descr, do);
-
- comp_data = (usb_isoc_complete_data_t*)kmem_cache_alloc(isoc_compl_cache, GFP_ATOMIC);
- assert(comp_data != NULL);
-
- INIT_WORK(&comp_data->usb_bh, etrax_usb_isoc_descr_interrupt_bottom_half, comp_data);
- schedule_work(&comp_data->usb_bh);
- }
-
- DBFEXIT;
- return IRQ_HANDLED;
-}
-
-static void etrax_usb_isoc_descr_interrupt_bottom_half(void *data)
-{
- usb_isoc_complete_data_t *comp_data = (usb_isoc_complete_data_t*)data;
-
- struct urb *urb;
- int epid;
- int epid_done;
- etrax_urb_priv_t *urb_priv;
-
- DBFENTER;
-
- dbg_isoc("dma8_sub3_descr (ISOC) bottom half.");
-
- for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
- unsigned long flags;
-
- save_flags(flags);
- cli();
-
- epid_done = 0;
-
- /* The descriptor interrupt handler has marked all transmitted isoch. out
- URBs with TRANSFER_DONE. Now we traverse all epids and for all that
- have isoch. out traffic traverse its URB list and complete the
- transmitted URB.
- */
-
- while (!epid_done) {
-
- /* Get the first urb (if any). */
- urb = urb_list_first(epid);
- if (urb == 0) {
- epid_done = 1;
- continue;
- }
-
- if (usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) {
- epid_done = 1;
- continue;
- }
-
- if (!usb_pipeout(urb->pipe)) {
- /* descr interrupts are generated only for out pipes. */
- epid_done = 1;
- continue;
- }
-
- dbg_isoc("Check epid %d, SB 0x%p", epid, (char*)TxIsocEPList[epid].sub);
-
- urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
- assert(urb_priv);
-
- if (urb_priv->urb_state == TRANSFER_DONE) {
- int i;
- struct usb_iso_packet_descriptor *packet;
-
- /* This urb has been sent. */
- dbg_isoc("Completing isoc out URB 0x%p", urb);
-
- for (i = 0; i < urb->number_of_packets; i++) {
- packet = &urb->iso_frame_desc[i];
- packet->status = 0;
- packet->actual_length = packet->length;
- }
-
- etrax_usb_complete_isoc_urb(urb, 0);
-
- if (urb_list_empty(epid)) {
- etrax_usb_free_epid(epid);
- epid_done = 1;
- }
- } else {
- epid_done = 1;
- }
- }
- restore_flags(flags);
-
- }
- kmem_cache_free(isoc_compl_cache, comp_data);
-
- DBFEXIT;
-}
-
-
-
-static irqreturn_t etrax_usb_rx_interrupt(int irq, void *vhc)
-{
- struct urb *urb;
- etrax_urb_priv_t *urb_priv;
- int epid = 0;
- unsigned long flags;
-
- /* Isoc diagnostics. */
- static int curr_fm = 0;
- static int prev_fm = 0;
-
- DBFENTER;
-
- /* Clear this interrupt. */
- *R_DMA_CH9_CLR_INTR = IO_STATE(R_DMA_CH9_CLR_INTR, clr_eop, do);
-
- /* Note that this while loop assumes that all packets span only
- one rx descriptor. */
-
- /* The reason we cli here is that we call the driver's callback functions. */
- save_flags(flags);
- cli();
-
- while (myNextRxDesc->status & IO_MASK(USB_IN_status, eop)) {
-
- epid = IO_EXTRACT(USB_IN_status, epid, myNextRxDesc->status);
- urb = urb_list_first(epid);
-
- //printk("eop for epid %d, first urb 0x%lx\n", epid, (unsigned long)urb);
-
- if (!urb) {
- err("No urb for epid %d in rx interrupt", epid);
- __dump_ept_data(epid);
- goto skip_out;
- }
-
- /* Note that we cannot indescriminately assert(usb_pipein(urb->pipe)) since
- ctrl pipes are not. */
-
- if (myNextRxDesc->status & IO_MASK(USB_IN_status, error)) {
- __u32 r_usb_ept_data;
- int no_error = 0;
-
- assert(test_bit(epid, (void *)&epid_usage_bitmask));
-
- *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
- nop();
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
- r_usb_ept_data = *R_USB_EPT_DATA_ISO;
-
- if ((r_usb_ept_data & IO_MASK(R_USB_EPT_DATA_ISO, valid)) &&
- (IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data) == 0) &&
- (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata))) {
- /* Not an error, just a failure to receive an expected iso
- in packet in this frame. This is not documented
- in the designers reference.
- */
- no_error++;
- } else {
- warn("R_USB_EPT_DATA_ISO for epid %d = 0x%x", epid, r_usb_ept_data);
- }
- } else {
- r_usb_ept_data = *R_USB_EPT_DATA;
- warn("R_USB_EPT_DATA for epid %d = 0x%x", epid, r_usb_ept_data);
- }
-
- if (!no_error){
- warn("error in rx desc->status, epid %d, first urb = 0x%lx",
- epid, (unsigned long)urb);
- __dump_in_desc(myNextRxDesc);
-
- warn("R_USB_STATUS = 0x%x", *R_USB_STATUS);
-
- /* Check that ept was disabled when error occurred. */
- switch (usb_pipetype(urb->pipe)) {
- case PIPE_BULK:
- assert(!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)));
- break;
- case PIPE_CONTROL:
- assert(!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)));
- break;
- case PIPE_INTERRUPT:
- assert(!(TxIntrEPList[epid].command & IO_MASK(USB_EP_command, enable)));
- break;
- case PIPE_ISOCHRONOUS:
- assert(!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)));
- break;
- default:
- warn("etrax_usb_rx_interrupt: bad pipetype %d in urb 0x%p",
- usb_pipetype(urb->pipe),
- urb);
- }
- etrax_usb_complete_urb(urb, -EPROTO);
- goto skip_out;
- }
- }
-
- urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
- assert(urb_priv);
-
- if ((usb_pipetype(urb->pipe) == PIPE_BULK) ||
- (usb_pipetype(urb->pipe) == PIPE_CONTROL) ||
- (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) {
-
- if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) {
- /* We get nodata for empty data transactions, and the rx descriptor's
- hw_len field is not valid in that case. No data to copy in other
- words. */
- } else {
- /* Make sure the data fits in the buffer. */
- assert(urb_priv->rx_offset + myNextRxDesc->hw_len
- <= urb->transfer_buffer_length);
-
- memcpy(urb->transfer_buffer + urb_priv->rx_offset,
- phys_to_virt(myNextRxDesc->buf), myNextRxDesc->hw_len);
- urb_priv->rx_offset += myNextRxDesc->hw_len;
- }
-
- if (myNextRxDesc->status & IO_MASK(USB_IN_status, eot)) {
- if ((usb_pipetype(urb->pipe) == PIPE_CONTROL) &&
- ((TxCtrlEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable)) ==
- IO_STATE(USB_EP_command, enable, yes))) {
- /* The EP is still enabled, so the OUT packet used to ack
- the in data is probably not processed yet. If the EP
- sub pointer has not moved beyond urb_priv->last_sb mark
- it for a descriptor interrupt and complete the urb in
- the descriptor interrupt handler.
- */
- USB_SB_Desc_t *sub = TxCtrlEPList[urb_priv->epid].sub ? phys_to_virt(TxCtrlEPList[urb_priv->epid].sub) : 0;
-
- while ((sub != NULL) && (sub != urb_priv->last_sb)) {
- sub = sub->next ? phys_to_virt(sub->next) : 0;
- }
- if (sub != NULL) {
- /* The urb has not been fully processed. */
- urb_priv->urb_state = WAITING_FOR_DESCR_INTR;
- } else {
- warn("(CTRL) epid enabled and urb (0x%p) processed, ep->sub=0x%p", urb, (char*)TxCtrlEPList[urb_priv->epid].sub);
- etrax_usb_complete_urb(urb, 0);
- }
- } else {
- etrax_usb_complete_urb(urb, 0);
- }
- }
-
- } else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-
- struct usb_iso_packet_descriptor *packet;
-
- if (urb_priv->urb_state == UNLINK) {
- info("Ignoring rx data for urb being unlinked.");
- goto skip_out;
- } else if (urb_priv->urb_state == NOT_STARTED) {
- info("What? Got rx data for urb that isn't started?");
- goto skip_out;
- }
-
- packet = &urb->iso_frame_desc[urb_priv->isoc_packet_counter];
- packet->status = 0;
-
- if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) {
- /* We get nodata for empty data transactions, and the rx descriptor's
- hw_len field is not valid in that case. We copy 0 bytes however to
- stay in synch. */
- packet->actual_length = 0;
- } else {
- packet->actual_length = myNextRxDesc->hw_len;
- /* Make sure the data fits in the buffer. */
- assert(packet->actual_length <= packet->length);
- memcpy(urb->transfer_buffer + packet->offset,
- phys_to_virt(myNextRxDesc->buf), packet->actual_length);
- }
-
- /* Increment the packet counter. */
- urb_priv->isoc_packet_counter++;
-
- /* Note that we don't care about the eot field in the rx descriptor's status.
- It will always be set for isoc traffic. */
- if (urb->number_of_packets == urb_priv->isoc_packet_counter) {
-
- /* Out-of-synch diagnostics. */
- curr_fm = (*R_USB_FM_NUMBER & 0x7ff);
- if (((prev_fm + urb_priv->isoc_packet_counter) % (0x7ff + 1)) != curr_fm) {
- /* This test is wrong, if there is more than one isoc
- in endpoint active it will always calculate wrong
- since prev_fm is shared by all endpoints.
-
- FIXME Make this check per URB using urb->start_frame.
- */
- dbg_isoc("Out of synch? Previous frame = %d, current frame = %d",
- prev_fm, curr_fm);
-
- }
- prev_fm = curr_fm;
-
- /* Complete the urb with status OK. */
- etrax_usb_complete_isoc_urb(urb, 0);
- }
- }
-
- skip_out:
-
- /* DMA IN cache bug. Flush the DMA IN buffer from the cache. (struct etrax_dma_descr
- has the same layout as USB_IN_Desc for the relevant fields.) */
- prepare_rx_descriptor((struct etrax_dma_descr*)myNextRxDesc);
-
- myPrevRxDesc = myNextRxDesc;
- myPrevRxDesc->command |= IO_MASK(USB_IN_command, eol);
- myLastRxDesc->command &= ~IO_MASK(USB_IN_command, eol);
- myLastRxDesc = myPrevRxDesc;
-
- myNextRxDesc->status = 0;
- myNextRxDesc = phys_to_virt(myNextRxDesc->next);
- }
-
- restore_flags(flags);
-
- DBFEXIT;
-
- return IRQ_HANDLED;
-}
-
-
-/* This function will unlink the SB descriptors associated with this urb. */
-static int etrax_remove_from_sb_list(struct urb *urb)
-{
- USB_SB_Desc_t *next_sb, *first_sb, *last_sb;
- etrax_urb_priv_t *urb_priv;
- int i = 0;
-
- DBFENTER;
-
- urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
- assert(urb_priv);
-
- /* Just a sanity check. Since we don't fiddle with the DMA list the EP descriptor
- doesn't really need to be disabled, it's just that we expect it to be. */
- if (usb_pipetype(urb->pipe) == PIPE_BULK) {
- assert(!(TxBulkEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable)));
- } else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
- assert(!(TxCtrlEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable)));
- }
-
- first_sb = urb_priv->first_sb;
- last_sb = urb_priv->last_sb;
-
- assert(first_sb);
- assert(last_sb);
-
- while (first_sb != last_sb) {
- next_sb = (USB_SB_Desc_t *)phys_to_virt(first_sb->next);
- kmem_cache_free(usb_desc_cache, first_sb);
- first_sb = next_sb;
- i++;
- }
- kmem_cache_free(usb_desc_cache, last_sb);
- i++;
- dbg_sb("%d SB descriptors freed", i);
- /* Compare i with urb->number_of_packets for Isoc traffic.
- Should be same when calling unlink_urb */
-
- DBFEXIT;
-
- return i;
-}
-
-static int etrax_usb_submit_bulk_urb(struct urb *urb)
-{
- int epid;
- int empty;
- unsigned long flags;
- etrax_urb_priv_t *urb_priv;
-
- DBFENTER;
-
- /* Epid allocation, empty check and list add must be protected.
- Read about this in etrax_usb_submit_ctrl_urb. */
-
- spin_lock_irqsave(&urb_list_lock, flags);
- epid = etrax_usb_setup_epid(urb);
- if (epid == -1) {
- DBFEXIT;
- spin_unlock_irqrestore(&urb_list_lock, flags);
- return -ENOMEM;
- }
- empty = urb_list_empty(epid);
- urb_list_add(urb, epid);
- spin_unlock_irqrestore(&urb_list_lock, flags);
-
- dbg_bulk("Adding bulk %s urb 0x%lx to %s list, epid %d",
- usb_pipein(urb->pipe) ? "IN" : "OUT", (unsigned long)urb, empty ? "empty" : "", epid);
-
- /* Mark the urb as being in progress. */
- urb->status = -EINPROGRESS;
-
- /* Setup the hcpriv data. */
- urb_priv = kzalloc(sizeof(etrax_urb_priv_t), KMALLOC_FLAG);
- assert(urb_priv != NULL);
- /* This sets rx_offset to 0. */
- urb_priv->urb_state = NOT_STARTED;
- urb->hcpriv = urb_priv;
-
- if (empty) {
- etrax_usb_add_to_bulk_sb_list(urb, epid);
- }
-
- DBFEXIT;
-
- return 0;
-}
-
-static void etrax_usb_add_to_bulk_sb_list(struct urb *urb, int epid)
-{
- USB_SB_Desc_t *sb_desc;
- etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
- unsigned long flags;
- char maxlen;
-
- DBFENTER;
-
- dbg_bulk("etrax_usb_add_to_bulk_sb_list, urb 0x%lx", (unsigned long)urb);
-
- maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
-
- sb_desc = kmem_cache_zalloc(usb_desc_cache, SLAB_FLAG);
- assert(sb_desc != NULL);
-
-
- if (usb_pipeout(urb->pipe)) {
-
- dbg_bulk("Grabbing bulk OUT, urb 0x%lx, epid %d", (unsigned long)urb, epid);
-
- /* This is probably a sanity check of the bulk transaction length
- not being larger than 64 kB. */
- if (urb->transfer_buffer_length > 0xffff) {
- panic("urb->transfer_buffer_length > 0xffff");
- }
-
- sb_desc->sw_len = urb->transfer_buffer_length;
-
- /* The rem field is don't care if it's not a full-length transfer, so setting
- it shouldn't hurt. Also, rem isn't used for OUT traffic. */
- sb_desc->command = (IO_FIELD(USB_SB_command, rem, 0) |
- IO_STATE(USB_SB_command, tt, out) |
- IO_STATE(USB_SB_command, eot, yes) |
- IO_STATE(USB_SB_command, eol, yes));
-
- /* The full field is set to yes, even if we don't actually check that this is
- a full-length transfer (i.e., that transfer_buffer_length % maxlen = 0).
- Setting full prevents the USB controller from sending an empty packet in
- that case. However, if URB_ZERO_PACKET was set we want that. */
- if (!(urb->transfer_flags & URB_ZERO_PACKET)) {
- sb_desc->command |= IO_STATE(USB_SB_command, full, yes);
- }
-
- sb_desc->buf = virt_to_phys(urb->transfer_buffer);
- sb_desc->next = 0;
-
- } else if (usb_pipein(urb->pipe)) {
-
- dbg_bulk("Grabbing bulk IN, urb 0x%lx, epid %d", (unsigned long)urb, epid);
-
- sb_desc->sw_len = urb->transfer_buffer_length ?
- (urb->transfer_buffer_length - 1) / maxlen + 1 : 0;
-
- /* The rem field is don't care if it's not a full-length transfer, so setting
- it shouldn't hurt. */
- sb_desc->command =
- (IO_FIELD(USB_SB_command, rem,
- urb->transfer_buffer_length % maxlen) |
- IO_STATE(USB_SB_command, tt, in) |
- IO_STATE(USB_SB_command, eot, yes) |
- IO_STATE(USB_SB_command, eol, yes));
-
- sb_desc->buf = 0;
- sb_desc->next = 0;
- }
-
- urb_priv->first_sb = sb_desc;
- urb_priv->last_sb = sb_desc;
- urb_priv->epid = epid;
-
- urb->hcpriv = urb_priv;
-
- /* Reset toggle bits and reset error count. */
- save_flags(flags);
- cli();
-
- *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
- nop();
-
- /* FIXME: Is this a special case since the hold field is checked,
- or should we check hold in a lot of other cases as well? */
- if (*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)) {
- panic("Hold was set in %s", __FUNCTION__);
- }
-
- /* Reset error counters (regardless of which direction this traffic is). */
- *R_USB_EPT_DATA &=
- ~(IO_MASK(R_USB_EPT_DATA, error_count_in) |
- IO_MASK(R_USB_EPT_DATA, error_count_out));
-
- /* Software must preset the toggle bits. */
- if (usb_pipeout(urb->pipe)) {
- char toggle =
- usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe));
- *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_out);
- *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_out, toggle);
- } else {
- char toggle =
- usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe));
- *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_in);
- *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_in, toggle);
- }
-
- /* Assert that the EP descriptor is disabled. */
- assert(!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)));
-
- /* The reason we set the EP's sub pointer directly instead of
- walking the SB list and linking it last in the list is that we only
- have one active urb at a time (the rest are queued). */
-
- /* Note that we cannot have interrupts running when we have set the SB descriptor
- but the EP is not yet enabled. If a bulk eot happens for another EP, we will
- find this EP disabled and with a SB != 0, which will make us think that it's done. */
- TxBulkEPList[epid].sub = virt_to_phys(sb_desc);
- TxBulkEPList[epid].hw_len = 0;
- /* Note that we don't have to fill in the ep_id field since this
- was done when we allocated the EP descriptors in init_tx_bulk_ep. */
-
- /* Check if the dummy list is already with us (if several urbs were queued). */
- if (TxBulkEPList[epid].next != virt_to_phys(&TxBulkDummyEPList[epid][0])) {
-
- dbg_bulk("Inviting dummy list to the party for urb 0x%lx, epid %d",
- (unsigned long)urb, epid);
-
- /* The last EP in the dummy list already has its next pointer set to
- TxBulkEPList[epid].next. */
-
- /* We don't need to check if the DMA is at this EP or not before changing the
- next pointer, since we will do it in one 32-bit write (EP descriptors are
- 32-bit aligned). */
- TxBulkEPList[epid].next = virt_to_phys(&TxBulkDummyEPList[epid][0]);
- }
- /* Enable the EP descr. */
- dbg_bulk("Enabling bulk EP for urb 0x%lx, epid %d", (unsigned long)urb, epid);
- TxBulkEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
-
- /* Everything is set up, safe to enable interrupts again. */
- restore_flags(flags);
-
- /* If the DMA bulk channel isn't running, we need to restart it if it
- has stopped at the last EP descriptor (DMA stopped because there was
- no more traffic) or if it has stopped at a dummy EP with the intr flag
- set (DMA stopped because we were too slow in inserting new traffic). */
- if (!(*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd))) {
-
- USB_EP_Desc_t *ep;
- ep = (USB_EP_Desc_t *)phys_to_virt(*R_DMA_CH8_SUB0_EP);
- dbg_bulk("DMA channel not running in add");
- dbg_bulk("DMA is at 0x%lx", (unsigned long)ep);
-
- if (*R_DMA_CH8_SUB0_EP == virt_to_phys(&TxBulkEPList[NBR_OF_EPIDS - 1]) ||
- (ep->command & 0x8) >> 3) {
- *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start);
- /* Update/restart the bulk start timer since we just started the channel. */
- mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL);
- /* Update/restart the bulk eot timer since we just inserted traffic. */
- mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
- }
- }
-
- DBFEXIT;
-}
-
-static void etrax_usb_complete_bulk_urb(struct urb *urb, int status)
-{
- etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
- int epid = urb_priv->epid;
- unsigned long flags;
-
- DBFENTER;
-
- if (status)
- warn("Completing bulk urb with status %d.", status);
-
- dbg_bulk("Completing bulk urb 0x%lx for epid %d", (unsigned long)urb, epid);
-
- /* Update the urb list. */
- urb_list_del(urb, epid);
-
- /* For an IN pipe, we always set the actual length, regardless of whether there was
- an error or not (which means the device driver can use the data if it wants to). */
- if (usb_pipein(urb->pipe)) {
- urb->actual_length = urb_priv->rx_offset;
- } else {
- /* Set actual_length for OUT urbs also; the USB mass storage driver seems
- to want that. We wouldn't know of any partial writes if there was an error. */
- if (status == 0) {
- urb->actual_length = urb->transfer_buffer_length;
- } else {
- urb->actual_length = 0;
- }
- }
-
- /* FIXME: Is there something of the things below we shouldn't do if there was an error?
- Like, maybe we shouldn't toggle the toggle bits, or maybe we shouldn't insert more traffic. */
-
- save_flags(flags);
- cli();
-
- *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
- nop();
-
- /* We need to fiddle with the toggle bits because the hardware doesn't do it for us. */
- if (usb_pipeout(urb->pipe)) {
- char toggle =
- IO_EXTRACT(R_USB_EPT_DATA, t_out, *R_USB_EPT_DATA);
- usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
- usb_pipeout(urb->pipe), toggle);
- } else {
- char toggle =
- IO_EXTRACT(R_USB_EPT_DATA, t_in, *R_USB_EPT_DATA);
- usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
- usb_pipeout(urb->pipe), toggle);
- }
- restore_flags(flags);
-
- /* Remember to free the SBs. */
- etrax_remove_from_sb_list(urb);
- kfree(urb_priv);
- urb->hcpriv = 0;
-
- /* If there are any more urb's in the list we'd better start sending */
- if (!urb_list_empty(epid)) {
-
- struct urb *new_urb;
-
- /* Get the first urb. */
- new_urb = urb_list_first(epid);
- assert(new_urb);
-
- dbg_bulk("More bulk for epid %d", epid);
-
- etrax_usb_add_to_bulk_sb_list(new_urb, epid);
- }
-
- urb->status = status;
-
- /* We let any non-zero status from the layer above have precedence. */
- if (status == 0) {
- /* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's max length)
- is to be treated as an error. */
- if (urb->transfer_flags & URB_SHORT_NOT_OK) {
- if (usb_pipein(urb->pipe) &&
- (urb->actual_length !=
- usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)))) {
- urb->status = -EREMOTEIO;
- }
- }
- }
-
- if (urb->complete) {
- urb->complete(urb, NULL);
- }
-
- if (urb_list_empty(epid)) {
- /* This means that this EP is now free, deconfigure it. */
- etrax_usb_free_epid(epid);
-
- /* No more traffic; time to clean up.
- Must set sub pointer to 0, since we look at the sub pointer when handling
- the bulk eot interrupt. */
-
- dbg_bulk("No bulk for epid %d", epid);
-
- TxBulkEPList[epid].sub = 0;
-
- /* Unlink the dummy list. */
-
- dbg_bulk("Kicking dummy list out of party for urb 0x%lx, epid %d",
- (unsigned long)urb, epid);
-
- /* No need to wait for the DMA before changing the next pointer.
- The modulo NBR_OF_EPIDS isn't actually necessary, since we will never use
- the last one (INVALID_EPID) for actual traffic. */
- TxBulkEPList[epid].next =
- virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]);
- }
-
- DBFEXIT;
-}
-
-static int etrax_usb_submit_ctrl_urb(struct urb *urb)
-{
- int epid;
- int empty;
- unsigned long flags;
- etrax_urb_priv_t *urb_priv;
-
- DBFENTER;
-
- /* FIXME: Return -ENXIO if there is already a queued urb for this endpoint? */
-
- /* Epid allocation, empty check and list add must be protected.
-
- Epid allocation because if we find an existing epid for this endpoint an urb might be
- completed (emptying the list) before we add the new urb to the list, causing the epid
- to be de-allocated. We would then start the transfer with an invalid epid -> epid attn.
-
- Empty check and add because otherwise we might conclude that the list is not empty,
- after which it becomes empty before we add the new urb to the list, causing us not to
- insert the new traffic into the SB list. */
-
- spin_lock_irqsave(&urb_list_lock, flags);
- epid = etrax_usb_setup_epid(urb);
- if (epid == -1) {
- spin_unlock_irqrestore(&urb_list_lock, flags);
- DBFEXIT;
- return -ENOMEM;
- }
- empty = urb_list_empty(epid);
- urb_list_add(urb, epid);
- spin_unlock_irqrestore(&urb_list_lock, flags);
-
- dbg_ctrl("Adding ctrl urb 0x%lx to %s list, epid %d",
- (unsigned long)urb, empty ? "empty" : "", epid);
-
- /* Mark the urb as being in progress. */
- urb->status = -EINPROGRESS;
-
- /* Setup the hcpriv data. */
- urb_priv = kzalloc(sizeof(etrax_urb_priv_t), KMALLOC_FLAG);
- assert(urb_priv != NULL);
- /* This sets rx_offset to 0. */
- urb_priv->urb_state = NOT_STARTED;
- urb->hcpriv = urb_priv;
-
- if (empty) {
- etrax_usb_add_to_ctrl_sb_list(urb, epid);
- }
-
- DBFEXIT;
-
- return 0;
-}
-
-static void etrax_usb_add_to_ctrl_sb_list(struct urb *urb, int epid)
-{
- USB_SB_Desc_t *sb_desc_setup;
- USB_SB_Desc_t *sb_desc_data;
- USB_SB_Desc_t *sb_desc_status;
-
- etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-
- unsigned long flags;
- char maxlen;
-
- DBFENTER;
-
- maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
-
- sb_desc_setup = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
- assert(sb_desc_setup != NULL);
- sb_desc_status = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
- assert(sb_desc_status != NULL);
-
- /* Initialize the mandatory setup SB descriptor (used only in control transfers) */
- sb_desc_setup->sw_len = 8;
- sb_desc_setup->command = (IO_FIELD(USB_SB_command, rem, 0) |
- IO_STATE(USB_SB_command, tt, setup) |
- IO_STATE(USB_SB_command, full, yes) |
- IO_STATE(USB_SB_command, eot, yes));
-
- sb_desc_setup->buf = virt_to_phys(urb->setup_packet);
-
- if (usb_pipeout(urb->pipe)) {
- dbg_ctrl("Transfer for epid %d is OUT", epid);
-
- /* If this Control OUT transfer has an optional data stage we add an OUT token
- before the mandatory IN (status) token, hence the reordered SB list */
-
- sb_desc_setup->next = virt_to_phys(sb_desc_status);
- if (urb->transfer_buffer) {
-
- dbg_ctrl("This OUT transfer has an extra data stage");
-
- sb_desc_data = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
- assert(sb_desc_data != NULL);
-
- sb_desc_setup->next = virt_to_phys(sb_desc_data);
-
- sb_desc_data->sw_len = urb->transfer_buffer_length;
- sb_desc_data->command = (IO_STATE(USB_SB_command, tt, out) |
- IO_STATE(USB_SB_command, full, yes) |
- IO_STATE(USB_SB_command, eot, yes));
- sb_desc_data->buf = virt_to_phys(urb->transfer_buffer);
- sb_desc_data->next = virt_to_phys(sb_desc_status);
- }
-
- sb_desc_status->sw_len = 1;
- sb_desc_status->command = (IO_FIELD(USB_SB_command, rem, 0) |
- IO_STATE(USB_SB_command, tt, in) |
- IO_STATE(USB_SB_command, eot, yes) |
- IO_STATE(USB_SB_command, intr, yes) |
- IO_STATE(USB_SB_command, eol, yes));
-
- sb_desc_status->buf = 0;
- sb_desc_status->next = 0;
-
- } else if (usb_pipein(urb->pipe)) {
-
- dbg_ctrl("Transfer for epid %d is IN", epid);
- dbg_ctrl("transfer_buffer_length = %d", urb->transfer_buffer_length);
- dbg_ctrl("rem is calculated to %d", urb->transfer_buffer_length % maxlen);
-
- sb_desc_data = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
- assert(sb_desc_data != NULL);
-
- sb_desc_setup->next = virt_to_phys(sb_desc_data);
-
- sb_desc_data->sw_len = urb->transfer_buffer_length ?
- (urb->transfer_buffer_length - 1) / maxlen + 1 : 0;
- dbg_ctrl("sw_len got %d", sb_desc_data->sw_len);
-
- sb_desc_data->command =
- (IO_FIELD(USB_SB_command, rem,
- urb->transfer_buffer_length % maxlen) |
- IO_STATE(USB_SB_command, tt, in) |
- IO_STATE(USB_SB_command, eot, yes));
-
- sb_desc_data->buf = 0;
- sb_desc_data->next = virt_to_phys(sb_desc_status);
-
- /* Read comment at zout_buffer declaration for an explanation to this. */
- sb_desc_status->sw_len = 1;
- sb_desc_status->command = (IO_FIELD(USB_SB_command, rem, 0) |
- IO_STATE(USB_SB_command, tt, zout) |
- IO_STATE(USB_SB_command, full, yes) |
- IO_STATE(USB_SB_command, eot, yes) |
- IO_STATE(USB_SB_command, intr, yes) |
- IO_STATE(USB_SB_command, eol, yes));
-
- sb_desc_status->buf = virt_to_phys(&zout_buffer[0]);
- sb_desc_status->next = 0;
- }
-
- urb_priv->first_sb = sb_desc_setup;
- urb_priv->last_sb = sb_desc_status;
- urb_priv->epid = epid;
-
- urb_priv->urb_state = STARTED;
-
- /* Reset toggle bits and reset error count, remember to di and ei */
- /* Warning: it is possible that this locking doesn't work with bottom-halves */
-
- save_flags(flags);
- cli();
-
- *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
- nop();
- if (*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)) {
- panic("Hold was set in %s", __FUNCTION__);
- }
-
-
- /* FIXME: Compare with etrax_usb_add_to_bulk_sb_list where the toggle bits
- are set to a specific value. Why the difference? Read "Transfer and Toggle Bits
- in Designer's Reference, p. 8 - 11. */
- *R_USB_EPT_DATA &=
- ~(IO_MASK(R_USB_EPT_DATA, error_count_in) |
- IO_MASK(R_USB_EPT_DATA, error_count_out) |
- IO_MASK(R_USB_EPT_DATA, t_in) |
- IO_MASK(R_USB_EPT_DATA, t_out));
-
- /* Since we use the rx interrupt to complete ctrl urbs, we can enable interrupts now
- (i.e. we don't check the sub pointer on an eot interrupt like we do for bulk traffic). */
- restore_flags(flags);
-
- /* Assert that the EP descriptor is disabled. */
- assert(!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)));
-
- /* Set up and enable the EP descriptor. */
- TxCtrlEPList[epid].sub = virt_to_phys(sb_desc_setup);
- TxCtrlEPList[epid].hw_len = 0;
- TxCtrlEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
-
- /* We start the DMA sub channel without checking if it's running or not, because:
- 1) If it's already running, issuing the start command is a nop.
- 2) We avoid a test-and-set race condition. */
- *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB1_CMD, cmd, start);
-
- DBFEXIT;
-}
-
-static void etrax_usb_complete_ctrl_urb(struct urb *urb, int status)
-{
- etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
- int epid = urb_priv->epid;
-
- DBFENTER;
-
- if (status)
- warn("Completing ctrl urb with status %d.", status);
-
- dbg_ctrl("Completing ctrl epid %d, urb 0x%lx", epid, (unsigned long)urb);
-
- /* Remove this urb from the list. */
- urb_list_del(urb, epid);
-
- /* For an IN pipe, we always set the actual length, regardless of whether there was
- an error or not (which means the device driver can use the data if it wants to). */
- if (usb_pipein(urb->pipe)) {
- urb->actual_length = urb_priv->rx_offset;
- }
-
- /* FIXME: Is there something of the things below we shouldn't do if there was an error?
- Like, maybe we shouldn't insert more traffic. */
-
- /* Remember to free the SBs. */
- etrax_remove_from_sb_list(urb);
- kfree(urb_priv);
- urb->hcpriv = 0;
-
- /* If there are any more urbs in the list we'd better start sending. */
- if (!urb_list_empty(epid)) {
- struct urb *new_urb;
-
- /* Get the first urb. */
- new_urb = urb_list_first(epid);
- assert(new_urb);
-
- dbg_ctrl("More ctrl for epid %d, first urb = 0x%lx", epid, (unsigned long)new_urb);
-
- etrax_usb_add_to_ctrl_sb_list(new_urb, epid);
- }
-
- urb->status = status;
-
- /* We let any non-zero status from the layer above have precedence. */
- if (status == 0) {
- /* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's max length)
- is to be treated as an error. */
- if (urb->transfer_flags & URB_SHORT_NOT_OK) {
- if (usb_pipein(urb->pipe) &&
- (urb->actual_length !=
- usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)))) {
- urb->status = -EREMOTEIO;
- }
- }
- }
-
- if (urb->complete) {
- urb->complete(urb, NULL);
- }
-
- if (urb_list_empty(epid)) {
- /* No more traffic. Time to clean up. */
- etrax_usb_free_epid(epid);
- /* Must set sub pointer to 0. */
- dbg_ctrl("No ctrl for epid %d", epid);
- TxCtrlEPList[epid].sub = 0;
- }
-
- DBFEXIT;
-}
-
-static int etrax_usb_submit_intr_urb(struct urb *urb)
-{
-
- int epid;
-
- DBFENTER;
-
- if (usb_pipeout(urb->pipe)) {
- /* Unsupported transfer type.
- We don't support interrupt out traffic. (If we do, we can't support
- intervals for neither in or out traffic, but are forced to schedule all
- interrupt traffic in one frame.) */
- return -EINVAL;
- }
-
- epid = etrax_usb_setup_epid(urb);
- if (epid == -1) {
- DBFEXIT;
- return -ENOMEM;
- }
-
- if (!urb_list_empty(epid)) {
- /* There is already a queued urb for this endpoint. */
- etrax_usb_free_epid(epid);
- return -ENXIO;
- }
-
- urb->status = -EINPROGRESS;
-
- dbg_intr("Add intr urb 0x%lx, to list, epid %d", (unsigned long)urb, epid);
-
- urb_list_add(urb, epid);
- etrax_usb_add_to_intr_sb_list(urb, epid);
-
- return 0;
-
- DBFEXIT;
-}
-
-static void etrax_usb_add_to_intr_sb_list(struct urb *urb, int epid)
-{
-
- volatile USB_EP_Desc_t *tmp_ep;
- volatile USB_EP_Desc_t *first_ep;
-
- char maxlen;
- int interval;
- int i;
-
- etrax_urb_priv_t *urb_priv;
-
- DBFENTER;
-
- maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
- interval = urb->interval;
-
- urb_priv = kzalloc(sizeof(etrax_urb_priv_t), KMALLOC_FLAG);
- assert(urb_priv != NULL);
- urb->hcpriv = urb_priv;
-
- first_ep = &TxIntrEPList[0];
-
- /* Round of the interval to 2^n, it is obvious that this code favours
- smaller numbers, but that is actually a good thing */
- /* FIXME: The "rounding error" for larger intervals will be quite
- large. For in traffic this shouldn't be a problem since it will only
- mean that we "poll" more often. */
- for (i = 0; interval; i++) {
- interval = interval >> 1;
- }
- interval = 1 << (i - 1);
-
- dbg_intr("Interval rounded to %d", interval);
-
- tmp_ep = first_ep;
- i = 0;
- do {
- if (tmp_ep->command & IO_MASK(USB_EP_command, eof)) {
- if ((i % interval) == 0) {
- /* Insert the traffic ep after tmp_ep */
- USB_EP_Desc_t *ep_desc;
- USB_SB_Desc_t *sb_desc;
-
- dbg_intr("Inserting EP for epid %d", epid);
-
- ep_desc = (USB_EP_Desc_t *)
- kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
- sb_desc = (USB_SB_Desc_t *)
- kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
- assert(ep_desc != NULL);
- CHECK_ALIGN(ep_desc);
- assert(sb_desc != NULL);
-
- ep_desc->sub = virt_to_phys(sb_desc);
- ep_desc->hw_len = 0;
- ep_desc->command = (IO_FIELD(USB_EP_command, epid, epid) |
- IO_STATE(USB_EP_command, enable, yes));
-
-
- /* Round upwards the number of packets of size maxlen
- that this SB descriptor should receive. */
- sb_desc->sw_len = urb->transfer_buffer_length ?
- (urb->transfer_buffer_length - 1) / maxlen + 1 : 0;
- sb_desc->next = 0;
- sb_desc->buf = 0;
- sb_desc->command =
- (IO_FIELD(USB_SB_command, rem, urb->transfer_buffer_length % maxlen) |
- IO_STATE(USB_SB_command, tt, in) |
- IO_STATE(USB_SB_command, eot, yes) |
- IO_STATE(USB_SB_command, eol, yes));
-
- ep_desc->next = tmp_ep->next;
- tmp_ep->next = virt_to_phys(ep_desc);
- }
- i++;
- }
- tmp_ep = (USB_EP_Desc_t *)phys_to_virt(tmp_ep->next);
- } while (tmp_ep != first_ep);
-
-
- /* Note that first_sb/last_sb doesn't apply to interrupt traffic. */
- urb_priv->epid = epid;
-
- /* We start the DMA sub channel without checking if it's running or not, because:
- 1) If it's already running, issuing the start command is a nop.
- 2) We avoid a test-and-set race condition. */
- *R_DMA_CH8_SUB2_CMD = IO_STATE(R_DMA_CH8_SUB2_CMD, cmd, start);
-
- DBFEXIT;
-}
-
-
-
-static void etrax_usb_complete_intr_urb(struct urb *urb, int status)
-{
- etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
- int epid = urb_priv->epid;
-
- DBFENTER;
-
- if (status)
- warn("Completing intr urb with status %d.", status);
-
- dbg_intr("Completing intr epid %d, urb 0x%lx", epid, (unsigned long)urb);
-
- urb->status = status;
- urb->actual_length = urb_priv->rx_offset;
-
- dbg_intr("interrupt urb->actual_length = %d", urb->actual_length);
-
- /* We let any non-zero status from the layer above have precedence. */
- if (status == 0) {
- /* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's max length)
- is to be treated as an error. */
- if (urb->transfer_flags & URB_SHORT_NOT_OK) {
- if (urb->actual_length !=
- usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))) {
- urb->status = -EREMOTEIO;
- }
- }
- }
-
- /* The driver will resubmit the URB so we need to remove it first */
- etrax_usb_unlink_urb(urb, 0);
- if (urb->complete) {
- urb->complete(urb, NULL);
- }
-
- DBFEXIT;
-}
-
-
-static int etrax_usb_submit_isoc_urb(struct urb *urb)
-{
- int epid;
- unsigned long flags;
-
- DBFENTER;
-
- dbg_isoc("Submitting isoc urb = 0x%lx", (unsigned long)urb);
-
- /* Epid allocation, empty check and list add must be protected.
- Read about this in etrax_usb_submit_ctrl_urb. */
-
- spin_lock_irqsave(&urb_list_lock, flags);
- /* Is there an active epid for this urb ? */
- epid = etrax_usb_setup_epid(urb);
- if (epid == -1) {
- DBFEXIT;
- spin_unlock_irqrestore(&urb_list_lock, flags);
- return -ENOMEM;
- }
-
- /* Ok, now we got valid endpoint, lets insert some traffic */
-
- urb->status = -EINPROGRESS;
-
- /* Find the last urb in the URB_List and add this urb after that one.
- Also add the traffic, that is do an etrax_usb_add_to_isoc_sb_list. This
- is important to make this in "real time" since isochronous traffic is
- time sensitive. */
-
- dbg_isoc("Adding isoc urb to (possibly empty) list");
- urb_list_add(urb, epid);
- etrax_usb_add_to_isoc_sb_list(urb, epid);
- spin_unlock_irqrestore(&urb_list_lock, flags);
-
- DBFEXIT;
-
- return 0;
-}
-
-static void etrax_usb_check_error_isoc_ep(const int epid)
-{
- unsigned long int flags;
- int error_code;
- __u32 r_usb_ept_data;
-
- /* We can't read R_USB_EPID_ATTN here since it would clear the iso_eof,
- bulk_eot and epid_attn interrupts. So we just check the status of
- the epid without testing if for it in R_USB_EPID_ATTN. */
-
-
- save_flags(flags);
- cli();
- *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
- nop();
- /* Note that although there are separate R_USB_EPT_DATA and R_USB_EPT_DATA_ISO
- registers, they are located at the same address and are of the same size.
- In other words, this read should be ok for isoc also. */
- r_usb_ept_data = *R_USB_EPT_DATA;
- restore_flags(flags);
-
- error_code = IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data);
-
- if (r_usb_ept_data & IO_MASK(R_USB_EPT_DATA, hold)) {
- warn("Hold was set for epid %d.", epid);
- return;
- }
-
- if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA_ISO, error_code, no_error)) {
-
- /* This indicates that the SB list of the ept was completed before
- new data was appended to it. This is not an error, but indicates
- large system or USB load and could possibly cause trouble for
- very timing sensitive USB device drivers so we log it.
- */
- info("Isoc. epid %d disabled with no error", epid);
- return;
-
- } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA_ISO, error_code, stall)) {
- /* Not really a protocol error, just says that the endpoint gave
- a stall response. Note that error_code cannot be stall for isoc. */
- panic("Isoc traffic cannot stall");
-
- } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA_ISO, error_code, bus_error)) {
- /* Two devices responded to a transaction request. Must be resolved
- by software. FIXME: Reset ports? */
- panic("Bus error for epid %d."
- " Two devices responded to transaction request",
- epid);
-
- } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, buffer_error)) {
- /* DMA overrun or underrun. */
- warn("Buffer overrun/underrun for epid %d. DMA too busy?", epid);
-
- /* It seems that error_code = buffer_error in
- R_USB_EPT_DATA/R_USB_EPT_DATA_ISO and ourun = yes in R_USB_STATUS
- are the same error. */
- }
-}
-
-
-static void etrax_usb_add_to_isoc_sb_list(struct urb *urb, int epid)
-{
-
- int i = 0;
-
- etrax_urb_priv_t *urb_priv;
- USB_SB_Desc_t *prev_sb_desc, *next_sb_desc, *temp_sb_desc;
-
- DBFENTER;
-
- prev_sb_desc = next_sb_desc = temp_sb_desc = NULL;
-
- urb_priv = kzalloc(sizeof(etrax_urb_priv_t), GFP_ATOMIC);
- assert(urb_priv != NULL);
-
- urb->hcpriv = urb_priv;
- urb_priv->epid = epid;
-
- if (usb_pipeout(urb->pipe)) {
-
- if (urb->number_of_packets == 0) panic("etrax_usb_add_to_isoc_sb_list 0 packets\n");
-
- dbg_isoc("Transfer for epid %d is OUT", epid);
- dbg_isoc("%d packets in URB", urb->number_of_packets);
-
- /* Create one SB descriptor for each packet and link them together. */
- for (i = 0; i < urb->number_of_packets; i++) {
- if (!urb->iso_frame_desc[i].length)
- continue;
-
- next_sb_desc = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, GFP_ATOMIC);
- assert(next_sb_desc != NULL);
-
- if (urb->iso_frame_desc[i].length > 0) {
-
- next_sb_desc->command = (IO_STATE(USB_SB_command, tt, out) |
- IO_STATE(USB_SB_command, eot, yes));
-
- next_sb_desc->sw_len = urb->iso_frame_desc[i].length;
- next_sb_desc->buf = virt_to_phys((char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset);
-
- /* Check if full length transfer. */
- if (urb->iso_frame_desc[i].length ==
- usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))) {
- next_sb_desc->command |= IO_STATE(USB_SB_command, full, yes);
- }
- } else {
- dbg_isoc("zero len packet");
- next_sb_desc->command = (IO_FIELD(USB_SB_command, rem, 0) |
- IO_STATE(USB_SB_command, tt, zout) |
- IO_STATE(USB_SB_command, eot, yes) |
- IO_STATE(USB_SB_command, full, yes));
-
- next_sb_desc->sw_len = 1;
- next_sb_desc->buf = virt_to_phys(&zout_buffer[0]);
- }
-
- /* First SB descriptor that belongs to this urb */
- if (i == 0)
- urb_priv->first_sb = next_sb_desc;
- else
- prev_sb_desc->next = virt_to_phys(next_sb_desc);
-
- prev_sb_desc = next_sb_desc;
- }
-
- next_sb_desc->command |= (IO_STATE(USB_SB_command, intr, yes) |
- IO_STATE(USB_SB_command, eol, yes));
- next_sb_desc->next = 0;
- urb_priv->last_sb = next_sb_desc;
-
- } else if (usb_pipein(urb->pipe)) {
-
- dbg_isoc("Transfer for epid %d is IN", epid);
- dbg_isoc("transfer_buffer_length = %d", urb->transfer_buffer_length);
- dbg_isoc("rem is calculated to %d", urb->iso_frame_desc[urb->number_of_packets - 1].length);
-
- /* Note that in descriptors for periodic traffic are not consumed. This means that
- the USB controller never propagates in the SB list. In other words, if there already
- is an SB descriptor in the list for this EP we don't have to do anything. */
- if (TxIsocEPList[epid].sub == 0) {
- dbg_isoc("Isoc traffic not already running, allocating SB");
-
- next_sb_desc = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, GFP_ATOMIC);
- assert(next_sb_desc != NULL);
-
- next_sb_desc->command = (IO_STATE(USB_SB_command, tt, in) |
- IO_STATE(USB_SB_command, eot, yes) |
- IO_STATE(USB_SB_command, eol, yes));
-
- next_sb_desc->next = 0;
- next_sb_desc->sw_len = 1; /* Actual number of packets is not relevant
- for periodic in traffic as long as it is more
- than zero. Set to 1 always. */
- next_sb_desc->buf = 0;
-
- /* The rem field is don't care for isoc traffic, so we don't set it. */
-
- /* Only one SB descriptor that belongs to this urb. */
- urb_priv->first_sb = next_sb_desc;
- urb_priv->last_sb = next_sb_desc;
-
- } else {
-
- dbg_isoc("Isoc traffic already running, just setting first/last_sb");
-
- /* Each EP for isoc in will have only one SB descriptor, setup when submitting the
- already active urb. Note that even though we may have several first_sb/last_sb
- pointing at the same SB descriptor, they are freed only once (when the list has
- become empty). */
- urb_priv->first_sb = phys_to_virt(TxIsocEPList[epid].sub);
- urb_priv->last_sb = phys_to_virt(TxIsocEPList[epid].sub);
- return;
- }
-
- }
-
- /* Find the spot to insert this urb and add it. */
- if (TxIsocEPList[epid].sub == 0) {
- /* First SB descriptor inserted in this list (in or out). */
- dbg_isoc("Inserting SB desc first in list");
- TxIsocEPList[epid].hw_len = 0;
- TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
-
- } else {
- /* Isochronous traffic is already running, insert new traffic last (only out). */
- dbg_isoc("Inserting SB desc last in list");
- temp_sb_desc = phys_to_virt(TxIsocEPList[epid].sub);
- while ((temp_sb_desc->command & IO_MASK(USB_SB_command, eol)) !=
- IO_STATE(USB_SB_command, eol, yes)) {
- assert(temp_sb_desc->next);
- temp_sb_desc = phys_to_virt(temp_sb_desc->next);
- }
- dbg_isoc("Appending list on desc 0x%p", temp_sb_desc);
-
- /* Next pointer must be set before eol is removed. */
- temp_sb_desc->next = virt_to_phys(urb_priv->first_sb);
- /* Clear the previous end of list flag since there is a new in the
- added SB descriptor list. */
- temp_sb_desc->command &= ~IO_MASK(USB_SB_command, eol);
-
- if (!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) {
- /* 8.8.5 in Designer's Reference says we should check for and correct
- any errors in the EP here. That should not be necessary if epid_attn
- is handled correctly, so we assume all is ok. */
- dbg_isoc("EP disabled");
- etrax_usb_check_error_isoc_ep(epid);
-
- /* The SB list was exhausted. */
- if (virt_to_phys(urb_priv->last_sb) != TxIsocEPList[epid].sub) {
- /* The new sublist did not get processed before the EP was
- disabled. Setup the EP again. */
- dbg_isoc("Set EP sub to new list");
- TxIsocEPList[epid].hw_len = 0;
- TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
- }
- }
- }
-
- if (urb->transfer_flags & URB_ISO_ASAP) {
- /* The isoc transfer should be started as soon as possible. The start_frame
- field is a return value if URB_ISO_ASAP was set. Comparing R_USB_FM_NUMBER
- with a USB Chief trace shows that the first isoc IN token is sent 2 frames
- later. I'm not sure how this affects usage of the start_frame field by the
- device driver, or how it affects things when USB_ISO_ASAP is not set, so
- therefore there's no compensation for the 2 frame "lag" here. */
- urb->start_frame = (*R_USB_FM_NUMBER & 0x7ff);
- TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
- urb_priv->urb_state = STARTED;
- dbg_isoc("URB_ISO_ASAP set, urb->start_frame set to %d", urb->start_frame);
- } else {
- /* Not started yet. */
- urb_priv->urb_state = NOT_STARTED;
- dbg_isoc("urb_priv->urb_state set to NOT_STARTED");
- }
-
- /* We start the DMA sub channel without checking if it's running or not, because:
- 1) If it's already running, issuing the start command is a nop.
- 2) We avoid a test-and-set race condition. */
- *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start);
-
- DBFEXIT;
-}
-
-static void etrax_usb_complete_isoc_urb(struct urb *urb, int status)
-{
- etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
- int epid = urb_priv->epid;
- int auto_resubmit = 0;
-
- DBFENTER;
- dbg_isoc("complete urb 0x%p, status %d", urb, status);
-
- if (status)
- warn("Completing isoc urb with status %d.", status);
-
- if (usb_pipein(urb->pipe)) {
- int i;
-
- /* Make that all isoc packets have status and length set before
- completing the urb. */
- for (i = urb_priv->isoc_packet_counter; i < urb->number_of_packets; i++) {
- urb->iso_frame_desc[i].actual_length = 0;
- urb->iso_frame_desc[i].status = -EPROTO;
- }
-
- urb_list_del(urb, epid);
-
- if (!list_empty(&urb_list[epid])) {
- ((etrax_urb_priv_t *)(urb_list_first(epid)->hcpriv))->urb_state = STARTED;
- } else {
- unsigned long int flags;
- if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
- /* The EP was enabled, disable it and wait. */
- TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-
- /* Ah, the luxury of busy-wait. */
- while (*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid]));
- }
-
- etrax_remove_from_sb_list(urb);
- TxIsocEPList[epid].sub = 0;
- TxIsocEPList[epid].hw_len = 0;
-
- save_flags(flags);
- cli();
- etrax_usb_free_epid(epid);
- restore_flags(flags);
- }
-
- urb->hcpriv = 0;
- kfree(urb_priv);
-
- /* Release allocated bandwidth. */
- usb_release_bandwidth(urb->dev, urb, 0);
- } else if (usb_pipeout(urb->pipe)) {
- int freed_descr;
-
- dbg_isoc("Isoc out urb complete 0x%p", urb);
-
- /* Update the urb list. */
- urb_list_del(urb, epid);
-
- freed_descr = etrax_remove_from_sb_list(urb);
- dbg_isoc("freed %d descriptors of %d packets", freed_descr, urb->number_of_packets);
- assert(freed_descr == urb->number_of_packets);
- urb->hcpriv = 0;
- kfree(urb_priv);
-
- /* Release allocated bandwidth. */
- usb_release_bandwidth(urb->dev, urb, 0);
- }
-
- urb->status = status;
- if (urb->complete) {
- urb->complete(urb, NULL);
- }
-
- if (auto_resubmit) {
- /* Check that urb was not unlinked by the complete callback. */
- if (__urb_list_entry(urb, epid)) {
- /* Move this one down the list. */
- urb_list_move_last(urb, epid);
-
- /* Mark the now first urb as started (may already be). */
- ((etrax_urb_priv_t *)(urb_list_first(epid)->hcpriv))->urb_state = STARTED;
-
- /* Must set this to 0 since this urb is still active after
- completion. */
- urb_priv->isoc_packet_counter = 0;
- } else {
- warn("(ISOC) automatic resubmit urb 0x%p removed by complete.", urb);
- }
- }
-
- DBFEXIT;
-}
-
-static void etrax_usb_complete_urb(struct urb *urb, int status)
-{
- switch (usb_pipetype(urb->pipe)) {
- case PIPE_BULK:
- etrax_usb_complete_bulk_urb(urb, status);
- break;
- case PIPE_CONTROL:
- etrax_usb_complete_ctrl_urb(urb, status);
- break;
- case PIPE_INTERRUPT:
- etrax_usb_complete_intr_urb(urb, status);
- break;
- case PIPE_ISOCHRONOUS:
- etrax_usb_complete_isoc_urb(urb, status);
- break;
- default:
- err("Unknown pipetype");
- }
-}
-
-
-
-static irqreturn_t etrax_usb_hc_interrupt_top_half(int irq, void *vhc)
-{
- usb_interrupt_registers_t *reg;
- unsigned long flags;
- __u32 irq_mask;
- __u8 status;
- __u32 epid_attn;
- __u16 port_status_1;
- __u16 port_status_2;
- __u32 fm_number;
-
- DBFENTER;
-
- /* Read critical registers into local variables, do kmalloc afterwards. */
- save_flags(flags);
- cli();
-
- irq_mask = *R_USB_IRQ_MASK_READ;
- /* Reading R_USB_STATUS clears the ctl_status interrupt. Note that R_USB_STATUS
- must be read before R_USB_EPID_ATTN since reading the latter clears the
- ourun and perror fields of R_USB_STATUS. */
- status = *R_USB_STATUS;
-
- /* Reading R_USB_EPID_ATTN clears the iso_eof, bulk_eot and epid_attn interrupts. */
- epid_attn = *R_USB_EPID_ATTN;
-
- /* Reading R_USB_RH_PORT_STATUS_1 and R_USB_RH_PORT_STATUS_2 clears the
- port_status interrupt. */
- port_status_1 = *R_USB_RH_PORT_STATUS_1;
- port_status_2 = *R_USB_RH_PORT_STATUS_2;
-
- /* Reading R_USB_FM_NUMBER clears the sof interrupt. */
- /* Note: the lower 11 bits contain the actual frame number, sent with each sof. */
- fm_number = *R_USB_FM_NUMBER;
-
- restore_flags(flags);
-
- reg = (usb_interrupt_registers_t *)kmem_cache_alloc(top_half_reg_cache, GFP_ATOMIC);
-
- assert(reg != NULL);
-
- reg->hc = (etrax_hc_t *)vhc;
-
- /* Now put register values into kmalloc'd area. */
- reg->r_usb_irq_mask_read = irq_mask;
- reg->r_usb_status = status;
- reg->r_usb_epid_attn = epid_attn;
- reg->r_usb_rh_port_status_1 = port_status_1;
- reg->r_usb_rh_port_status_2 = port_status_2;
- reg->r_usb_fm_number = fm_number;
-
- INIT_WORK(®->usb_bh, etrax_usb_hc_interrupt_bottom_half, reg);
- schedule_work(®->usb_bh);
-
- DBFEXIT;
-
- return IRQ_HANDLED;
-}
-
-static void etrax_usb_hc_interrupt_bottom_half(void *data)
-{
- usb_interrupt_registers_t *reg = (usb_interrupt_registers_t *)data;
- __u32 irq_mask = reg->r_usb_irq_mask_read;
-
- DBFENTER;
-
- /* Interrupts are handled in order of priority. */
- if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, epid_attn)) {
- etrax_usb_hc_epid_attn_interrupt(reg);
- }
- if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, port_status)) {
- etrax_usb_hc_port_status_interrupt(reg);
- }
- if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, ctl_status)) {
- etrax_usb_hc_ctl_status_interrupt(reg);
- }
- if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, iso_eof)) {
- etrax_usb_hc_isoc_eof_interrupt();
- }
- if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, bulk_eot)) {
- /* Update/restart the bulk start timer since obviously the channel is running. */
- mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL);
- /* Update/restart the bulk eot timer since we just received an bulk eot interrupt. */
- mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
-
- etrax_usb_hc_bulk_eot_interrupt(0);
- }
-
- kmem_cache_free(top_half_reg_cache, reg);
-
- DBFEXIT;
-}
-
-
-void etrax_usb_hc_isoc_eof_interrupt(void)
-{
- struct urb *urb;
- etrax_urb_priv_t *urb_priv;
- int epid;
- unsigned long flags;
-
- DBFENTER;
-
- /* Do not check the invalid epid (it has a valid sub pointer). */
- for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
-
- /* Do not check the invalid epid (it has a valid sub pointer). */
- if ((epid == DUMMY_EPID) || (epid == INVALID_EPID))
- continue;
-
- /* Disable interrupts to block the isoc out descriptor interrupt handler
- from being called while the isoc EPID list is being checked.
- */
- save_flags(flags);
- cli();
-
- if (TxIsocEPList[epid].sub == 0) {
- /* Nothing here to see. */
- restore_flags(flags);
- continue;
- }
-
- /* Get the first urb (if any). */
- urb = urb_list_first(epid);
- if (urb == 0) {
- warn("Ignoring NULL urb");
- restore_flags(flags);
- continue;
- }
- if (usb_pipein(urb->pipe)) {
-
- /* Sanity check. */
- assert(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
-
- urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
- assert(urb_priv);
-
- if (urb_priv->urb_state == NOT_STARTED) {
-
- /* If ASAP is not set and urb->start_frame is the current frame,
- start the transfer. */
- if (!(urb->transfer_flags & URB_ISO_ASAP) &&
- (urb->start_frame == (*R_USB_FM_NUMBER & 0x7ff))) {
-
- dbg_isoc("Enabling isoc IN EP descr for epid %d", epid);
- TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
-
- /* This urb is now active. */
- urb_priv->urb_state = STARTED;
- continue;
- }
- }
- }
- restore_flags(flags);
- }
-
- DBFEXIT;
-
-}
-
-void etrax_usb_hc_bulk_eot_interrupt(int timer_induced)
-{
- int epid;
-
- /* The technique is to run one urb at a time, wait for the eot interrupt at which
- point the EP descriptor has been disabled. */
-
- DBFENTER;
- dbg_bulk("bulk eot%s", timer_induced ? ", called by timer" : "");
-
- for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
-
- if (!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) &&
- (TxBulkEPList[epid].sub != 0)) {
-
- struct urb *urb;
- etrax_urb_priv_t *urb_priv;
- unsigned long flags;
- __u32 r_usb_ept_data;
-
- /* Found a disabled EP descriptor which has a non-null sub pointer.
- Verify that this ctrl EP descriptor got disabled no errors.
- FIXME: Necessary to check error_code? */
- dbg_bulk("for epid %d?", epid);
-
- /* Get the first urb. */
- urb = urb_list_first(epid);
-
- /* FIXME: Could this happen for valid reasons? Why did it disappear? Because of
- wrong unlinking? */
- if (!urb) {
- warn("NULL urb for epid %d", epid);
- continue;
- }
-
- assert(urb);
- urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
- assert(urb_priv);
-
- /* Sanity checks. */
- assert(usb_pipetype(urb->pipe) == PIPE_BULK);
- if (phys_to_virt(TxBulkEPList[epid].sub) != urb_priv->last_sb) {
- err("bulk endpoint got disabled before reaching last sb");
- }
-
- /* For bulk IN traffic, there seems to be a race condition between
- between the bulk eot and eop interrupts, or rather an uncertainty regarding
- the order in which they happen. Normally we expect the eop interrupt from
- DMA channel 9 to happen before the eot interrupt.
-
- Therefore, we complete the bulk IN urb in the rx interrupt handler instead. */
-
- if (usb_pipein(urb->pipe)) {
- dbg_bulk("in urb, continuing");
- continue;
- }
-
- save_flags(flags);
- cli();
- *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
- nop();
- r_usb_ept_data = *R_USB_EPT_DATA;
- restore_flags(flags);
-
- if (IO_EXTRACT(R_USB_EPT_DATA, error_code, r_usb_ept_data) ==
- IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
- /* This means that the endpoint has no error, is disabled
- and had inserted traffic, i.e. transfer successfully completed. */
- etrax_usb_complete_bulk_urb(urb, 0);
- } else {
- /* Shouldn't happen. We expect errors to be caught by epid attention. */
- err("Found disabled bulk EP desc, error_code != no_error");
- }
- }
- }
-
- /* Normally, we should find (at least) one disabled EP descriptor with a valid sub pointer.
- However, because of the uncertainty in the deliverance of the eop/eot interrupts, we may
- not. Also, we might find two disabled EPs when handling an eot interrupt, and then find
- none the next time. */
-
- DBFEXIT;
-
-}
-
-void etrax_usb_hc_epid_attn_interrupt(usb_interrupt_registers_t *reg)
-{
- /* This function handles the epid attention interrupt. There are a variety of reasons
- for this interrupt to happen (Designer's Reference, p. 8 - 22 for the details):
-
- invalid ep_id - Invalid epid in an EP (EP disabled).
- stall - Not strictly an error condition (EP disabled).
- 3rd error - Three successive transaction errors (EP disabled).
- buffer ourun - Buffer overrun or underrun (EP disabled).
- past eof1 - Intr or isoc transaction proceeds past EOF1.
- near eof - Intr or isoc transaction would not fit inside the frame.
- zout transfer - If zout transfer for a bulk endpoint (EP disabled).
- setup transfer - If setup transfer for a non-ctrl endpoint (EP disabled). */
-
- int epid;
-
-
- DBFENTER;
-
- assert(reg != NULL);
-
- /* Note that we loop through all epids. We still want to catch errors for
- the invalid one, even though we might handle them differently. */
- for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
-
- if (test_bit(epid, (void *)®->r_usb_epid_attn)) {
-
- struct urb *urb;
- __u32 r_usb_ept_data;
- unsigned long flags;
- int error_code;
-
- save_flags(flags);
- cli();
- *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
- nop();
- /* Note that although there are separate R_USB_EPT_DATA and R_USB_EPT_DATA_ISO
- registers, they are located at the same address and are of the same size.
- In other words, this read should be ok for isoc also. */
- r_usb_ept_data = *R_USB_EPT_DATA;
- restore_flags(flags);
-
- /* First some sanity checks. */
- if (epid == INVALID_EPID) {
- /* FIXME: What if it became disabled? Could seriously hurt interrupt
- traffic. (Use do_intr_recover.) */
- warn("Got epid_attn for INVALID_EPID (%d).", epid);
- err("R_USB_EPT_DATA = 0x%x", r_usb_ept_data);
- err("R_USB_STATUS = 0x%x", reg->r_usb_status);
- continue;
- } else if (epid == DUMMY_EPID) {
- /* We definitely don't care about these ones. Besides, they are
- always disabled, so any possible disabling caused by the
- epid attention interrupt is irrelevant. */
- warn("Got epid_attn for DUMMY_EPID (%d).", epid);
- continue;
- }
-
- /* Get the first urb in the urb list for this epid. We blatantly assume
- that only the first urb could have caused the epid attention.
- (For bulk and ctrl, only one urb is active at any one time. For intr
- and isoc we remove them once they are completed.) */
- urb = urb_list_first(epid);
-
- if (urb == NULL) {
- err("Got epid_attn for epid %i with no urb.", epid);
- err("R_USB_EPT_DATA = 0x%x", r_usb_ept_data);
- err("R_USB_STATUS = 0x%x", reg->r_usb_status);
- continue;
- }
-
- switch (usb_pipetype(urb->pipe)) {
- case PIPE_BULK:
- warn("Got epid attn for bulk endpoint, epid %d", epid);
- break;
- case PIPE_CONTROL:
- warn("Got epid attn for control endpoint, epid %d", epid);
- break;
- case PIPE_INTERRUPT:
- warn("Got epid attn for interrupt endpoint, epid %d", epid);
- break;
- case PIPE_ISOCHRONOUS:
- warn("Got epid attn for isochronous endpoint, epid %d", epid);
- break;
- }
-
- if (usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) {
- if (r_usb_ept_data & IO_MASK(R_USB_EPT_DATA, hold)) {
- warn("Hold was set for epid %d.", epid);
- continue;
- }
- }
-
- /* Even though error_code occupies bits 22 - 23 in both R_USB_EPT_DATA and
- R_USB_EPT_DATA_ISOC, we separate them here so we don't forget in other places. */
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
- error_code = IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data);
- } else {
- error_code = IO_EXTRACT(R_USB_EPT_DATA, error_code, r_usb_ept_data);
- }
-
- /* Using IO_STATE_VALUE on R_USB_EPT_DATA should be ok for isoc also. */
- if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
-
- /* Isoc traffic doesn't have error_count_in/error_count_out. */
- if ((usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) &&
- (IO_EXTRACT(R_USB_EPT_DATA, error_count_in, r_usb_ept_data) == 3 ||
- IO_EXTRACT(R_USB_EPT_DATA, error_count_out, r_usb_ept_data) == 3)) {
- /* 3rd error. */
- warn("3rd error for epid %i", epid);
- etrax_usb_complete_urb(urb, -EPROTO);
-
- } else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) {
-
- warn("Perror for epid %d", epid);
-
- if (!(r_usb_ept_data & IO_MASK(R_USB_EPT_DATA, valid))) {
- /* invalid ep_id */
- panic("Perror because of invalid epid."
- " Deconfigured too early?");
- } else {
- /* past eof1, near eof, zout transfer, setup transfer */
-
- /* Dump the urb and the relevant EP descriptor list. */
-
- __dump_urb(urb);
- __dump_ept_data(epid);
- __dump_ep_list(usb_pipetype(urb->pipe));
-
- panic("Something wrong with DMA descriptor contents."
- " Too much traffic inserted?");
- }
- } else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) {
- /* buffer ourun */
- panic("Buffer overrun/underrun for epid %d. DMA too busy?", epid);
- }
-
- } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, stall)) {
- /* Not really a protocol error, just says that the endpoint gave
- a stall response. Note that error_code cannot be stall for isoc. */
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
- panic("Isoc traffic cannot stall");
- }
-
- warn("Stall for epid %d", epid);
- etrax_usb_complete_urb(urb, -EPIPE);
-
- } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, bus_error)) {
- /* Two devices responded to a transaction request. Must be resolved
- by software. FIXME: Reset ports? */
- panic("Bus error for epid %d."
- " Two devices responded to transaction request",
- epid);
-
- } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, buffer_error)) {
- /* DMA overrun or underrun. */
- warn("Buffer overrun/underrun for epid %d. DMA too busy?", epid);
-
- /* It seems that error_code = buffer_error in
- R_USB_EPT_DATA/R_USB_EPT_DATA_ISO and ourun = yes in R_USB_STATUS
- are the same error. */
- etrax_usb_complete_urb(urb, -EPROTO);
- }
- }
- }
-
- DBFEXIT;
-
-}
-
-void etrax_usb_bulk_start_timer_func(unsigned long dummy)
-{
-
- /* We might enable an EP descriptor behind the current DMA position when it's about
- to decide that there are no more bulk traffic and it should stop the bulk channel.
- Therefore we periodically check if the bulk channel is stopped and there is an
- enabled bulk EP descriptor, in which case we start the bulk channel. */
- dbg_bulk("bulk_start_timer timed out.");
-
- if (!(*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd))) {
- int epid;
-
- dbg_bulk("Bulk DMA channel not running.");
-
- for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
- if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
- dbg_bulk("Found enabled EP for epid %d, starting bulk channel.\n",
- epid);
- *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start);
-
- /* Restart the bulk eot timer since we just started the bulk channel. */
- mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
-
- /* No need to search any further. */
- break;
- }
- }
- } else {
- dbg_bulk("Bulk DMA channel running.");
- }
-}
-
-void etrax_usb_hc_port_status_interrupt(usb_interrupt_registers_t *reg)
-{
- etrax_hc_t *hc = reg->hc;
- __u16 r_usb_rh_port_status_1 = reg->r_usb_rh_port_status_1;
- __u16 r_usb_rh_port_status_2 = reg->r_usb_rh_port_status_2;
-
- DBFENTER;
-
- /* The Etrax RH does not include a wPortChange register, so this has to be handled in software
- (by saving the old port status value for comparison when the port status interrupt happens).
- See section 11.16.2.6.2 in the USB 1.1 spec for details. */
-
- dbg_rh("hc->rh.prev_wPortStatus_1 = 0x%x", hc->rh.prev_wPortStatus_1);
- dbg_rh("hc->rh.prev_wPortStatus_2 = 0x%x", hc->rh.prev_wPortStatus_2);
- dbg_rh("r_usb_rh_port_status_1 = 0x%x", r_usb_rh_port_status_1);
- dbg_rh("r_usb_rh_port_status_2 = 0x%x", r_usb_rh_port_status_2);
-
- /* C_PORT_CONNECTION is set on any transition. */
- hc->rh.wPortChange_1 |=
- ((r_usb_rh_port_status_1 & (1 << RH_PORT_CONNECTION)) !=
- (hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_CONNECTION))) ?
- (1 << RH_PORT_CONNECTION) : 0;
-
- hc->rh.wPortChange_2 |=
- ((r_usb_rh_port_status_2 & (1 << RH_PORT_CONNECTION)) !=
- (hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_CONNECTION))) ?
- (1 << RH_PORT_CONNECTION) : 0;
-
- /* C_PORT_ENABLE is _only_ set on a one to zero transition, i.e. when
- the port is disabled, not when it's enabled. */
- hc->rh.wPortChange_1 |=
- ((hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_ENABLE))
- && !(r_usb_rh_port_status_1 & (1 << RH_PORT_ENABLE))) ?
- (1 << RH_PORT_ENABLE) : 0;
-
- hc->rh.wPortChange_2 |=
- ((hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_ENABLE))
- && !(r_usb_rh_port_status_2 & (1 << RH_PORT_ENABLE))) ?
- (1 << RH_PORT_ENABLE) : 0;
-
- /* C_PORT_SUSPEND is set to one when the device has transitioned out
- of the suspended state, i.e. when suspend goes from one to zero. */
- hc->rh.wPortChange_1 |=
- ((hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_SUSPEND))
- && !(r_usb_rh_port_status_1 & (1 << RH_PORT_SUSPEND))) ?
- (1 << RH_PORT_SUSPEND) : 0;
-
- hc->rh.wPortChange_2 |=
- ((hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_SUSPEND))
- && !(r_usb_rh_port_status_2 & (1 << RH_PORT_SUSPEND))) ?
- (1 << RH_PORT_SUSPEND) : 0;
-
-
- /* C_PORT_RESET is set when reset processing on this port is complete. */
- hc->rh.wPortChange_1 |=
- ((hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_RESET))
- && !(r_usb_rh_port_status_1 & (1 << RH_PORT_RESET))) ?
- (1 << RH_PORT_RESET) : 0;
-
- hc->rh.wPortChange_2 |=
- ((hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_RESET))
- && !(r_usb_rh_port_status_2 & (1 << RH_PORT_RESET))) ?
- (1 << RH_PORT_RESET) : 0;
-
- /* Save the new values for next port status change. */
- hc->rh.prev_wPortStatus_1 = r_usb_rh_port_status_1;
- hc->rh.prev_wPortStatus_2 = r_usb_rh_port_status_2;
-
- dbg_rh("hc->rh.wPortChange_1 set to 0x%x", hc->rh.wPortChange_1);
- dbg_rh("hc->rh.wPortChange_2 set to 0x%x", hc->rh.wPortChange_2);
-
- DBFEXIT;
-
-}
-
-void etrax_usb_hc_ctl_status_interrupt(usb_interrupt_registers_t *reg)
-{
- DBFENTER;
-
- /* FIXME: What should we do if we get ourun or perror? Dump the EP and SB
- list for the corresponding epid? */
- if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) {
- panic("USB controller got ourun.");
- }
- if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) {
-
- /* Before, etrax_usb_do_intr_recover was called on this epid if it was
- an interrupt pipe. I don't see how re-enabling all EP descriptors
- will help if there was a programming error. */
- panic("USB controller got perror.");
- }
-
- if (reg->r_usb_status & IO_MASK(R_USB_STATUS, device_mode)) {
- /* We should never operate in device mode. */
- panic("USB controller in device mode.");
- }
-
- /* These if-statements could probably be nested. */
- if (reg->r_usb_status & IO_MASK(R_USB_STATUS, host_mode)) {
- info("USB controller in host mode.");
- }
- if (reg->r_usb_status & IO_MASK(R_USB_STATUS, started)) {
- info("USB controller started.");
- }
- if (reg->r_usb_status & IO_MASK(R_USB_STATUS, running)) {
- info("USB controller running.");
- }
-
- DBFEXIT;
-
-}
-
-
-static int etrax_rh_submit_urb(struct urb *urb)
-{
- struct usb_device *usb_dev = urb->dev;
- etrax_hc_t *hc = usb_dev->bus->hcpriv;
- unsigned int pipe = urb->pipe;
- struct usb_ctrlrequest *cmd = (struct usb_ctrlrequest *) urb->setup_packet;
- void *data = urb->transfer_buffer;
- int leni = urb->transfer_buffer_length;
- int len = 0;
- int stat = 0;
-
- __u16 bmRType_bReq;
- __u16 wValue;
- __u16 wIndex;
- __u16 wLength;
-
- DBFENTER;
-
- /* FIXME: What is this interrupt urb that is sent to the root hub? */
- if (usb_pipetype (pipe) == PIPE_INTERRUPT) {
- dbg_rh("Root-Hub submit IRQ: every %d ms", urb->interval);
- hc->rh.urb = urb;
- hc->rh.send = 1;
- /* FIXME: We could probably remove this line since it's done
- in etrax_rh_init_int_timer. (Don't remove it from
- etrax_rh_init_int_timer though.) */
- hc->rh.interval = urb->interval;
- etrax_rh_init_int_timer(urb);
- DBFEXIT;
-
- return 0;
- }
-
- bmRType_bReq = cmd->bRequestType | (cmd->bRequest << 8);
- wValue = le16_to_cpu(cmd->wValue);
- wIndex = le16_to_cpu(cmd->wIndex);
- wLength = le16_to_cpu(cmd->wLength);
-
- dbg_rh("bmRType_bReq : 0x%04x (%d)", bmRType_bReq, bmRType_bReq);
- dbg_rh("wValue : 0x%04x (%d)", wValue, wValue);
- dbg_rh("wIndex : 0x%04x (%d)", wIndex, wIndex);
- dbg_rh("wLength : 0x%04x (%d)", wLength, wLength);
-
- switch (bmRType_bReq) {
-
- /* Request Destination:
- without flags: Device,
- RH_INTERFACE: interface,
- RH_ENDPOINT: endpoint,
- RH_CLASS means HUB here,
- RH_OTHER | RH_CLASS almost ever means HUB_PORT here
- */
-
- case RH_GET_STATUS:
- *(__u16 *) data = cpu_to_le16 (1);
- OK (2);
-
- case RH_GET_STATUS | RH_INTERFACE:
- *(__u16 *) data = cpu_to_le16 (0);
- OK (2);
-
- case RH_GET_STATUS | RH_ENDPOINT:
- *(__u16 *) data = cpu_to_le16 (0);
- OK (2);
-
- case RH_GET_STATUS | RH_CLASS:
- *(__u32 *) data = cpu_to_le32 (0);
- OK (4); /* hub power ** */
-
- case RH_GET_STATUS | RH_OTHER | RH_CLASS:
- if (wIndex == 1) {
- *((__u16*)data) = cpu_to_le16(hc->rh.prev_wPortStatus_1);
- *((__u16*)data + 1) = cpu_to_le16(hc->rh.wPortChange_1);
- } else if (wIndex == 2) {
- *((__u16*)data) = cpu_to_le16(hc->rh.prev_wPortStatus_2);
- *((__u16*)data + 1) = cpu_to_le16(hc->rh.wPortChange_2);
- } else {
- dbg_rh("RH_GET_STATUS whith invalid wIndex!");
- OK(0);
- }
-
- OK(4);
-
- case RH_CLEAR_FEATURE | RH_ENDPOINT:
- switch (wValue) {
- case (RH_ENDPOINT_STALL):
- OK (0);
- }
- break;
-
- case RH_CLEAR_FEATURE | RH_CLASS:
- switch (wValue) {
- case (RH_C_HUB_OVER_CURRENT):
- OK (0); /* hub power over current ** */
- }
- break;
-
- case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
- switch (wValue) {
- case (RH_PORT_ENABLE):
- if (wIndex == 1) {
-
- dbg_rh("trying to do disable port 1");
-
- *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, yes);
-
- while (hc->rh.prev_wPortStatus_1 &
- IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes));
- *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no);
- dbg_rh("Port 1 is disabled");
-
- } else if (wIndex == 2) {
-
- dbg_rh("trying to do disable port 2");
-
- *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, yes);
-
- while (hc->rh.prev_wPortStatus_2 &
- IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, yes));
- *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no);
- dbg_rh("Port 2 is disabled");
-
- } else {
- dbg_rh("RH_CLEAR_FEATURE->RH_PORT_ENABLE "
- "with invalid wIndex == %d!", wIndex);
- }
-
- OK (0);
- case (RH_PORT_SUSPEND):
- /* Opposite to suspend should be resume, so we'll do a resume. */
- /* FIXME: USB 1.1, 11.16.2.2 says:
- "Clearing the PORT_SUSPEND feature causes a host-initiated resume
- on the specified port. If the port is not in the Suspended state,
- the hub should treat this request as a functional no-operation."
- Shouldn't we check if the port is in a suspended state before
- resuming? */
-
- /* Make sure the controller isn't busy. */
- while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
- if (wIndex == 1) {
- *R_USB_COMMAND =
- IO_STATE(R_USB_COMMAND, port_sel, port1) |
- IO_STATE(R_USB_COMMAND, port_cmd, resume) |
- IO_STATE(R_USB_COMMAND, ctrl_cmd, nop);
- } else if (wIndex == 2) {
- *R_USB_COMMAND =
- IO_STATE(R_USB_COMMAND, port_sel, port2) |
- IO_STATE(R_USB_COMMAND, port_cmd, resume) |
- IO_STATE(R_USB_COMMAND, ctrl_cmd, nop);
- } else {
- dbg_rh("RH_CLEAR_FEATURE->RH_PORT_SUSPEND "
- "with invalid wIndex == %d!", wIndex);
- }
-
- OK (0);
- case (RH_PORT_POWER):
- OK (0); /* port power ** */
- case (RH_C_PORT_CONNECTION):
- if (wIndex == 1) {
- hc->rh.wPortChange_1 &= ~(1 << RH_PORT_CONNECTION);
- } else if (wIndex == 2) {
- hc->rh.wPortChange_2 &= ~(1 << RH_PORT_CONNECTION);
- } else {
- dbg_rh("RH_CLEAR_FEATURE->RH_C_PORT_CONNECTION "
- "with invalid wIndex == %d!", wIndex);
- }
-
- OK (0);
- case (RH_C_PORT_ENABLE):
- if (wIndex == 1) {
- hc->rh.wPortChange_1 &= ~(1 << RH_PORT_ENABLE);
- } else if (wIndex == 2) {
- hc->rh.wPortChange_2 &= ~(1 << RH_PORT_ENABLE);
- } else {
- dbg_rh("RH_CLEAR_FEATURE->RH_C_PORT_ENABLE "
- "with invalid wIndex == %d!", wIndex);
- }
- OK (0);
- case (RH_C_PORT_SUSPEND):
-/*** WR_RH_PORTSTAT(RH_PS_PSSC); */
- OK (0);
- case (RH_C_PORT_OVER_CURRENT):
- OK (0); /* port power over current ** */
- case (RH_C_PORT_RESET):
- if (wIndex == 1) {
- hc->rh.wPortChange_1 &= ~(1 << RH_PORT_RESET);
- } else if (wIndex == 2) {
- hc->rh.wPortChange_2 &= ~(1 << RH_PORT_RESET);
- } else {
- dbg_rh("RH_CLEAR_FEATURE->RH_C_PORT_RESET "
- "with invalid index == %d!", wIndex);
- }
-
- OK (0);
-
- }
- break;
-
- case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
- switch (wValue) {
- case (RH_PORT_SUSPEND):
-
- /* Make sure the controller isn't busy. */
- while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
- if (wIndex == 1) {
- *R_USB_COMMAND =
- IO_STATE(R_USB_COMMAND, port_sel, port1) |
- IO_STATE(R_USB_COMMAND, port_cmd, suspend) |
- IO_STATE(R_USB_COMMAND, ctrl_cmd, nop);
- } else if (wIndex == 2) {
- *R_USB_COMMAND =
- IO_STATE(R_USB_COMMAND, port_sel, port2) |
- IO_STATE(R_USB_COMMAND, port_cmd, suspend) |
- IO_STATE(R_USB_COMMAND, ctrl_cmd, nop);
- } else {
- dbg_rh("RH_SET_FEATURE->RH_PORT_SUSPEND "
- "with invalid wIndex == %d!", wIndex);
- }
-
- OK (0);
- case (RH_PORT_RESET):
- if (wIndex == 1) {
-
- port_1_reset:
- dbg_rh("Doing reset of port 1");
-
- /* Make sure the controller isn't busy. */
- while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
- *R_USB_COMMAND =
- IO_STATE(R_USB_COMMAND, port_sel, port1) |
- IO_STATE(R_USB_COMMAND, port_cmd, reset) |
- IO_STATE(R_USB_COMMAND, ctrl_cmd, nop);
-
- /* We must wait at least 10 ms for the device to recover.
- 15 ms should be enough. */
- udelay(15000);
-
- /* Wait for reset bit to go low (should be done by now). */
- while (hc->rh.prev_wPortStatus_1 &
- IO_STATE(R_USB_RH_PORT_STATUS_1, reset, yes));
-
- /* If the port status is
- 1) connected and enabled then there is a device and everything is fine
- 2) neither connected nor enabled then there is no device, also fine
- 3) connected and not enabled then we try again
- (Yes, there are other port status combinations besides these.) */
-
- if ((hc->rh.prev_wPortStatus_1 &
- IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes)) &&
- (hc->rh.prev_wPortStatus_1 &
- IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, no))) {
- dbg_rh("Connected device on port 1, but port not enabled?"
- " Trying reset again.");
- goto port_2_reset;
- }
-
- /* Diagnostic printouts. */
- if ((hc->rh.prev_wPortStatus_1 &
- IO_STATE(R_USB_RH_PORT_STATUS_1, connected, no)) &&
- (hc->rh.prev_wPortStatus_1 &
- IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, no))) {
- dbg_rh("No connected device on port 1");
- } else if ((hc->rh.prev_wPortStatus_1 &
- IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes)) &&
- (hc->rh.prev_wPortStatus_1 &
- IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes))) {
- dbg_rh("Connected device on port 1, port 1 enabled");
- }
-
- } else if (wIndex == 2) {
-
- port_2_reset:
- dbg_rh("Doing reset of port 2");
-
- /* Make sure the controller isn't busy. */
- while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
- /* Issue the reset command. */
- *R_USB_COMMAND =
- IO_STATE(R_USB_COMMAND, port_sel, port2) |
- IO_STATE(R_USB_COMMAND, port_cmd, reset) |
- IO_STATE(R_USB_COMMAND, ctrl_cmd, nop);
-
- /* We must wait at least 10 ms for the device to recover.
- 15 ms should be enough. */
- udelay(15000);
-
- /* Wait for reset bit to go low (should be done by now). */
- while (hc->rh.prev_wPortStatus_2 &
- IO_STATE(R_USB_RH_PORT_STATUS_2, reset, yes));
-
- /* If the port status is
- 1) connected and enabled then there is a device and everything is fine
- 2) neither connected nor enabled then there is no device, also fine
- 3) connected and not enabled then we try again
- (Yes, there are other port status combinations besides these.) */
-
- if ((hc->rh.prev_wPortStatus_2 &
- IO_STATE(R_USB_RH_PORT_STATUS_2, connected, yes)) &&
- (hc->rh.prev_wPortStatus_2 &
- IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, no))) {
- dbg_rh("Connected device on port 2, but port not enabled?"
- " Trying reset again.");
- goto port_2_reset;
- }
-
- /* Diagnostic printouts. */
- if ((hc->rh.prev_wPortStatus_2 &
- IO_STATE(R_USB_RH_PORT_STATUS_2, connected, no)) &&
- (hc->rh.prev_wPortStatus_2 &
- IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, no))) {
- dbg_rh("No connected device on port 2");
- } else if ((hc->rh.prev_wPortStatus_2 &
- IO_STATE(R_USB_RH_PORT_STATUS_2, connected, yes)) &&
- (hc->rh.prev_wPortStatus_2 &
- IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, yes))) {
- dbg_rh("Connected device on port 2, port 2 enabled");
- }
-
- } else {
- dbg_rh("RH_SET_FEATURE->RH_PORT_RESET with invalid wIndex = %d", wIndex);
- }
-
- /* Make sure the controller isn't busy. */
- while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
- /* If all enabled ports were disabled the host controller goes down into
- started mode, so we need to bring it back into the running state.
- (This is safe even if it's already in the running state.) */
- *R_USB_COMMAND =
- IO_STATE(R_USB_COMMAND, port_sel, nop) |
- IO_STATE(R_USB_COMMAND, port_cmd, reset) |
- IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
-
- dbg_rh("...Done");
- OK(0);
-
- case (RH_PORT_POWER):
- OK (0); /* port power ** */
- case (RH_PORT_ENABLE):
- /* There is no port enable command in the host controller, so if the
- port is already enabled, we do nothing. If not, we reset the port
- (with an ugly goto). */
-
- if (wIndex == 1) {
- if (hc->rh.prev_wPortStatus_1 &
- IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, no)) {
- goto port_1_reset;
- }
- } else if (wIndex == 2) {
- if (hc->rh.prev_wPortStatus_2 &
- IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, no)) {
- goto port_2_reset;
- }
- } else {
- dbg_rh("RH_SET_FEATURE->RH_GET_STATUS with invalid wIndex = %d", wIndex);
- }
- OK (0);
- }
- break;
-
- case RH_SET_ADDRESS:
- hc->rh.devnum = wValue;
- dbg_rh("RH address set to: %d", hc->rh.devnum);
- OK (0);
-
- case RH_GET_DESCRIPTOR:
- switch ((wValue & 0xff00) >> 8) {
- case (0x01): /* device descriptor */
- len = min_t(unsigned int, leni, min_t(unsigned int, sizeof (root_hub_dev_des), wLength));
- memcpy (data, root_hub_dev_des, len);
- OK (len);
- case (0x02): /* configuration descriptor */
- len = min_t(unsigned int, leni, min_t(unsigned int, sizeof (root_hub_config_des), wLength));
- memcpy (data, root_hub_config_des, len);
- OK (len);
- case (0x03): /* string descriptors */
- len = usb_root_hub_string (wValue & 0xff,
- 0xff, "ETRAX 100LX",
- data, wLength);
- if (len > 0) {
- OK(min(leni, len));
- } else {
- stat = -EPIPE;
- }
-
- }
- break;
-
- case RH_GET_DESCRIPTOR | RH_CLASS:
- root_hub_hub_des[2] = hc->rh.numports;
- len = min_t(unsigned int, leni, min_t(unsigned int, sizeof (root_hub_hub_des), wLength));
- memcpy (data, root_hub_hub_des, len);
- OK (len);
-
- case RH_GET_CONFIGURATION:
- *(__u8 *) data = 0x01;
- OK (1);
-
- case RH_SET_CONFIGURATION:
- OK (0);
-
- default:
- stat = -EPIPE;
- }
-
- urb->actual_length = len;
- urb->status = stat;
- urb->dev = NULL;
- if (urb->complete) {
- urb->complete(urb, NULL);
- }
- DBFEXIT;
-
- return 0;
-}
-
-static void
-etrax_usb_bulk_eot_timer_func(unsigned long dummy)
-{
- /* Because of a race condition in the top half, we might miss a bulk eot.
- This timer "simulates" a bulk eot if we don't get one for a while, hopefully
- correcting the situation. */
- dbg_bulk("bulk_eot_timer timed out.");
- etrax_usb_hc_bulk_eot_interrupt(1);
-}
-
-static void*
-etrax_usb_buffer_alloc(struct usb_bus* bus, size_t size,
- unsigned mem_flags, dma_addr_t *dma)
-{
- return kmalloc(size, mem_flags);
-}
-
-static void
-etrax_usb_buffer_free(struct usb_bus *bus, size_t size, void *addr, dma_addr_t dma)
-{
- kfree(addr);
-}
-
-
-static struct device fake_device;
-
-static int __init etrax_usb_hc_init(void)
-{
- static etrax_hc_t *hc;
- struct usb_bus *bus;
- struct usb_device *usb_rh;
- int i;
-
- DBFENTER;
-
- info("ETRAX 100LX USB-HCD %s (c) 2001-2003 Axis Communications AB\n", usb_hcd_version);
-
- hc = kmalloc(sizeof(etrax_hc_t), GFP_KERNEL);
- assert(hc != NULL);
-
- /* We use kmem_cache_* to make sure that all DMA desc. are dword aligned */
- /* Note that we specify sizeof(USB_EP_Desc_t) as the size, but also allocate
- SB descriptors from this cache. This is ok since sizeof(USB_EP_Desc_t) ==
- sizeof(USB_SB_Desc_t). */
-
- usb_desc_cache = kmem_cache_create("usb_desc_cache", sizeof(USB_EP_Desc_t), 0,
- SLAB_HWCACHE_ALIGN, 0, 0);
- assert(usb_desc_cache != NULL);
-
- top_half_reg_cache = kmem_cache_create("top_half_reg_cache",
- sizeof(usb_interrupt_registers_t),
- 0, SLAB_HWCACHE_ALIGN, 0, 0);
- assert(top_half_reg_cache != NULL);
-
- isoc_compl_cache = kmem_cache_create("isoc_compl_cache",
- sizeof(usb_isoc_complete_data_t),
- 0, SLAB_HWCACHE_ALIGN, 0, 0);
- assert(isoc_compl_cache != NULL);
-
- etrax_usb_bus = bus = usb_alloc_bus(&etrax_usb_device_operations);
- hc->bus = bus;
- bus->bus_name="ETRAX 100LX";
- bus->hcpriv = hc;
-
- /* Initialize RH to the default address.
- And make sure that we have no status change indication */
- hc->rh.numports = 2; /* The RH has two ports */
- hc->rh.devnum = 1;
- hc->rh.wPortChange_1 = 0;
- hc->rh.wPortChange_2 = 0;
-
- /* Also initate the previous values to zero */
- hc->rh.prev_wPortStatus_1 = 0;
- hc->rh.prev_wPortStatus_2 = 0;
-
- /* Initialize the intr-traffic flags */
- /* FIXME: This isn't used. (Besides, the error field isn't initialized.) */
- hc->intr.sleeping = 0;
- hc->intr.wq = NULL;
-
- epid_usage_bitmask = 0;
- epid_out_traffic = 0;
-
- /* Mark the invalid epid as being used. */
- set_bit(INVALID_EPID, (void *)&epid_usage_bitmask);
- *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, INVALID_EPID);
- nop();
- /* The valid bit should still be set ('invalid' is in our world; not the hardware's). */
- *R_USB_EPT_DATA = (IO_STATE(R_USB_EPT_DATA, valid, yes) |
- IO_FIELD(R_USB_EPT_DATA, max_len, 1));
-
- /* Mark the dummy epid as being used. */
- set_bit(DUMMY_EPID, (void *)&epid_usage_bitmask);
- *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, DUMMY_EPID);
- nop();
- *R_USB_EPT_DATA = (IO_STATE(R_USB_EPT_DATA, valid, no) |
- IO_FIELD(R_USB_EPT_DATA, max_len, 1));
-
- /* Initialize the urb list by initiating a head for each list. */
- for (i = 0; i < NBR_OF_EPIDS; i++) {
- INIT_LIST_HEAD(&urb_list[i]);
- }
- spin_lock_init(&urb_list_lock);
-
- INIT_LIST_HEAD(&urb_unlink_list);
-
-
- /* Initiate the bulk start timer. */
- init_timer(&bulk_start_timer);
- bulk_start_timer.expires = jiffies + BULK_START_TIMER_INTERVAL;
- bulk_start_timer.function = etrax_usb_bulk_start_timer_func;
- add_timer(&bulk_start_timer);
-
-
- /* Initiate the bulk eot timer. */
- init_timer(&bulk_eot_timer);
- bulk_eot_timer.expires = jiffies + BULK_EOT_TIMER_INTERVAL;
- bulk_eot_timer.function = etrax_usb_bulk_eot_timer_func;
- add_timer(&bulk_eot_timer);
-
- /* Set up the data structures for USB traffic. Note that this must be done before
- any interrupt that relies on sane DMA list occurrs. */
- init_rx_buffers();
- init_tx_bulk_ep();
- init_tx_ctrl_ep();
- init_tx_intr_ep();
- init_tx_isoc_ep();
-
- device_initialize(&fake_device);
- kobject_set_name(&fake_device.kobj, "etrax_usb");
- kobject_add(&fake_device.kobj);
- kobject_uevent(&fake_device.kobj, KOBJ_ADD);
- hc->bus->controller = &fake_device;
- usb_register_bus(hc->bus);
-
- *R_IRQ_MASK2_SET =
- /* Note that these interrupts are not used. */
- IO_STATE(R_IRQ_MASK2_SET, dma8_sub0_descr, set) |
- /* Sub channel 1 (ctrl) descr. interrupts are used. */
- IO_STATE(R_IRQ_MASK2_SET, dma8_sub1_descr, set) |
- IO_STATE(R_IRQ_MASK2_SET, dma8_sub2_descr, set) |
- /* Sub channel 3 (isoc) descr. interrupts are used. */
- IO_STATE(R_IRQ_MASK2_SET, dma8_sub3_descr, set);
-
- /* Note that the dma9_descr interrupt is not used. */
- *R_IRQ_MASK2_SET =
- IO_STATE(R_IRQ_MASK2_SET, dma9_eop, set) |
- IO_STATE(R_IRQ_MASK2_SET, dma9_descr, set);
-
- /* FIXME: Enable iso_eof only when isoc traffic is running. */
- *R_USB_IRQ_MASK_SET =
- IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set) |
- IO_STATE(R_USB_IRQ_MASK_SET, bulk_eot, set) |
- IO_STATE(R_USB_IRQ_MASK_SET, epid_attn, set) |
- IO_STATE(R_USB_IRQ_MASK_SET, port_status, set) |
- IO_STATE(R_USB_IRQ_MASK_SET, ctl_status, set);
-
-
- if (request_irq(ETRAX_USB_HC_IRQ, etrax_usb_hc_interrupt_top_half, 0,
- "ETRAX 100LX built-in USB (HC)", hc)) {
- err("Could not allocate IRQ %d for USB", ETRAX_USB_HC_IRQ);
- etrax_usb_hc_cleanup();
- DBFEXIT;
- return -1;
- }
-
- if (request_irq(ETRAX_USB_RX_IRQ, etrax_usb_rx_interrupt, 0,
- "ETRAX 100LX built-in USB (Rx)", hc)) {
- err("Could not allocate IRQ %d for USB", ETRAX_USB_RX_IRQ);
- etrax_usb_hc_cleanup();
- DBFEXIT;
- return -1;
- }
-
- if (request_irq(ETRAX_USB_TX_IRQ, etrax_usb_tx_interrupt, 0,
- "ETRAX 100LX built-in USB (Tx)", hc)) {
- err("Could not allocate IRQ %d for USB", ETRAX_USB_TX_IRQ);
- etrax_usb_hc_cleanup();
- DBFEXIT;
- return -1;
- }
-
- /* R_USB_COMMAND:
- USB commands in host mode. The fields in this register should all be
- written to in one write. Do not read-modify-write one field at a time. A
- write to this register will trigger events in the USB controller and an
- incomplete command may lead to unpredictable results, and in worst case
- even to a deadlock in the controller.
- (Note however that the busy field is read-only, so no need to write to it.) */
-
- /* Check the busy bit before writing to R_USB_COMMAND. */
-
- while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
- /* Reset the USB interface. */
- *R_USB_COMMAND =
- IO_STATE(R_USB_COMMAND, port_sel, nop) |
- IO_STATE(R_USB_COMMAND, port_cmd, reset) |
- IO_STATE(R_USB_COMMAND, ctrl_cmd, reset);
-
- /* Designer's Reference, p. 8 - 10 says we should Initate R_USB_FM_PSTART to 0x2A30 (10800),
- to guarantee that control traffic gets 10% of the bandwidth, and periodic transfer may
- allocate the rest (90%). This doesn't work though. Read on for a lenghty explanation.
-
- While there is a difference between rev. 2 and rev. 3 of the ETRAX 100LX regarding the NAK
- behaviour, it doesn't solve this problem. What happens is that a control transfer will not
- be interrupted in its data stage when PSTART happens (the point at which periodic traffic
- is started). Thus, if PSTART is set to 10800 and its IN or OUT token is NAKed until just before
- PSTART happens, it will continue the IN/OUT transfer as long as it's ACKed. After it's done,
- there may be too little time left for an isochronous transfer, causing an epid attention
- interrupt due to perror. The work-around for this is to let the control transfers run at the
- end of the frame instead of at the beginning, and will be interrupted just fine if it doesn't
- fit into the frame. However, since there will *always* be a control transfer at the beginning
- of the frame, regardless of what we set PSTART to, that transfer might be a 64-byte transfer
- which consumes up to 15% of the frame, leaving only 85% for periodic traffic. The solution to
- this would be to 'dummy allocate' 5% of the frame with the usb_claim_bandwidth function to make
- sure that the periodic transfers that are inserted will always fit in the frame.
-
- The idea was suggested that a control transfer could be split up into several 8 byte transfers,
- so that it would be interrupted by PSTART, but since this can't be done for an IN transfer this
- hasn't been implemented.
-
- The value 11960 is chosen to be just after the SOF token, with a couple of bit times extra
- for possible bit stuffing. */
-
- *R_USB_FM_PSTART = IO_FIELD(R_USB_FM_PSTART, value, 11960);
-
-#ifdef CONFIG_ETRAX_USB_HOST_PORT1
- *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no);
-#endif
-
-#ifdef CONFIG_ETRAX_USB_HOST_PORT2
- *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no);
-#endif
-
- while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
- /* Configure the USB interface as a host controller. */
- *R_USB_COMMAND =
- IO_STATE(R_USB_COMMAND, port_sel, nop) |
- IO_STATE(R_USB_COMMAND, port_cmd, reset) |
- IO_STATE(R_USB_COMMAND, ctrl_cmd, host_config);
-
- /* Note: Do not reset any ports here. Await the port status interrupts, to have a controlled
- sequence of resetting the ports. If we reset both ports now, and there are devices
- on both ports, we will get a bus error because both devices will answer the set address
- request. */
-
- while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
- /* Start processing of USB traffic. */
- *R_USB_COMMAND =
- IO_STATE(R_USB_COMMAND, port_sel, nop) |
- IO_STATE(R_USB_COMMAND, port_cmd, reset) |
- IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
-
- while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
- usb_rh = usb_alloc_dev(NULL, hc->bus, 0);
- hc->bus->root_hub = usb_rh;
- usb_rh->state = USB_STATE_ADDRESS;
- usb_rh->speed = USB_SPEED_FULL;
- usb_rh->devnum = 1;
- hc->bus->devnum_next = 2;
- usb_rh->ep0.desc.wMaxPacketSize = __const_cpu_to_le16(64);
- usb_get_device_descriptor(usb_rh, USB_DT_DEVICE_SIZE);
- usb_new_device(usb_rh);
-
- DBFEXIT;
-
- return 0;
-}
-
-static void etrax_usb_hc_cleanup(void)
-{
- DBFENTER;
-
- free_irq(ETRAX_USB_HC_IRQ, NULL);
- free_irq(ETRAX_USB_RX_IRQ, NULL);
- free_irq(ETRAX_USB_TX_IRQ, NULL);
-
- usb_deregister_bus(etrax_usb_bus);
-
- /* FIXME: call kmem_cache_destroy here? */
-
- DBFEXIT;
-}
-
-module_init(etrax_usb_hc_init);
-module_exit(etrax_usb_hc_cleanup);
+++ /dev/null
-#ifndef __LINUX_ETRAX_USB_H
-#define __LINUX_ETRAX_USB_H
-
-#include <linux/types.h>
-#include <linux/list.h>
-
-typedef struct USB_IN_Desc {
- volatile __u16 sw_len;
- volatile __u16 command;
- volatile unsigned long next;
- volatile unsigned long buf;
- volatile __u16 hw_len;
- volatile __u16 status;
-} USB_IN_Desc_t;
-
-typedef struct USB_SB_Desc {
- volatile __u16 sw_len;
- volatile __u16 command;
- volatile unsigned long next;
- volatile unsigned long buf;
- __u32 dummy;
-} USB_SB_Desc_t;
-
-typedef struct USB_EP_Desc {
- volatile __u16 hw_len;
- volatile __u16 command;
- volatile unsigned long sub;
- volatile unsigned long next;
- __u32 dummy;
-} USB_EP_Desc_t;
-
-struct virt_root_hub {
- int devnum;
- void *urb;
- void *int_addr;
- int send;
- int interval;
- int numports;
- struct timer_list rh_int_timer;
- volatile __u16 wPortChange_1;
- volatile __u16 wPortChange_2;
- volatile __u16 prev_wPortStatus_1;
- volatile __u16 prev_wPortStatus_2;
-};
-
-struct etrax_usb_intr_traffic {
- int sleeping;
- int error;
- struct wait_queue *wq;
-};
-
-typedef struct etrax_usb_hc {
- struct usb_bus *bus;
- struct virt_root_hub rh;
- struct etrax_usb_intr_traffic intr;
-} etrax_hc_t;
-
-typedef enum {
- STARTED,
- NOT_STARTED,
- UNLINK,
- TRANSFER_DONE,
- WAITING_FOR_DESCR_INTR
-} etrax_usb_urb_state_t;
-
-
-
-typedef struct etrax_usb_urb_priv {
- /* The first_sb field is used for freeing all SB descriptors belonging
- to an urb. The corresponding ep descriptor's sub pointer cannot be
- used for this since the DMA advances the sub pointer as it processes
- the sb list. */
- USB_SB_Desc_t *first_sb;
- /* The last_sb field referes to the last SB descriptor that belongs to
- this urb. This is important to know so we can free the SB descriptors
- that ranges between first_sb and last_sb. */
- USB_SB_Desc_t *last_sb;
-
- /* The rx_offset field is used in ctrl and bulk traffic to keep track
- of the offset in the urb's transfer_buffer where incoming data should be
- copied to. */
- __u32 rx_offset;
-
- /* Counter used in isochronous transfers to keep track of the
- number of packets received/transmitted. */
- __u32 isoc_packet_counter;
-
- /* This field is used to pass information about the urb's current state between
- the various interrupt handlers (thus marked volatile). */
- volatile etrax_usb_urb_state_t urb_state;
-
- /* Connection between the submitted urb and ETRAX epid number */
- __u8 epid;
-
- /* The rx_data_list field is used for periodic traffic, to hold
- received data for later processing in the the complete_urb functions,
- where the data us copied to the urb's transfer_buffer. Basically, we
- use this intermediate storage because we don't know when it's safe to
- reuse the transfer_buffer (FIXME?). */
- struct list_head rx_data_list;
-} etrax_urb_priv_t;
-
-/* This struct is for passing data from the top half to the bottom half. */
-typedef struct usb_interrupt_registers
-{
- etrax_hc_t *hc;
- __u32 r_usb_epid_attn;
- __u8 r_usb_status;
- __u16 r_usb_rh_port_status_1;
- __u16 r_usb_rh_port_status_2;
- __u32 r_usb_irq_mask_read;
- __u32 r_usb_fm_number;
- struct work_struct usb_bh;
-} usb_interrupt_registers_t;
-
-/* This struct is for passing data from the isoc top half to the isoc bottom half. */
-typedef struct usb_isoc_complete_data
-{
- struct urb *urb;
- struct work_struct usb_bh;
-} usb_isoc_complete_data_t;
-
-/* This struct holds data we get from the rx descriptors for DMA channel 9
- for periodic traffic (intr and isoc). */
-typedef struct rx_data
-{
- void *data;
- int length;
- struct list_head list;
-} rx_data_t;
-
-typedef struct urb_entry
-{
- struct urb *urb;
- struct list_head list;
-} urb_entry_t;
-
-/* ---------------------------------------------------------------------------
- Virtual Root HUB
- ------------------------------------------------------------------------- */
-/* destination of request */
-#define RH_INTERFACE 0x01
-#define RH_ENDPOINT 0x02
-#define RH_OTHER 0x03
-
-#define RH_CLASS 0x20
-#define RH_VENDOR 0x40
-
-/* Requests: bRequest << 8 | bmRequestType */
-#define RH_GET_STATUS 0x0080
-#define RH_CLEAR_FEATURE 0x0100
-#define RH_SET_FEATURE 0x0300
-#define RH_SET_ADDRESS 0x0500
-#define RH_GET_DESCRIPTOR 0x0680
-#define RH_SET_DESCRIPTOR 0x0700
-#define RH_GET_CONFIGURATION 0x0880
-#define RH_SET_CONFIGURATION 0x0900
-#define RH_GET_STATE 0x0280
-#define RH_GET_INTERFACE 0x0A80
-#define RH_SET_INTERFACE 0x0B00
-#define RH_SYNC_FRAME 0x0C80
-/* Our Vendor Specific Request */
-#define RH_SET_EP 0x2000
-
-
-/* Hub port features */
-#define RH_PORT_CONNECTION 0x00
-#define RH_PORT_ENABLE 0x01
-#define RH_PORT_SUSPEND 0x02
-#define RH_PORT_OVER_CURRENT 0x03
-#define RH_PORT_RESET 0x04
-#define RH_PORT_POWER 0x08
-#define RH_PORT_LOW_SPEED 0x09
-#define RH_C_PORT_CONNECTION 0x10
-#define RH_C_PORT_ENABLE 0x11
-#define RH_C_PORT_SUSPEND 0x12
-#define RH_C_PORT_OVER_CURRENT 0x13
-#define RH_C_PORT_RESET 0x14
-
-/* Hub features */
-#define RH_C_HUB_LOCAL_POWER 0x00
-#define RH_C_HUB_OVER_CURRENT 0x01
-
-#define RH_DEVICE_REMOTE_WAKEUP 0x00
-#define RH_ENDPOINT_STALL 0x01
-
-/* Our Vendor Specific feature */
-#define RH_REMOVE_EP 0x00
-
-
-#define RH_ACK 0x01
-#define RH_REQ_ERR -1
-#define RH_NACK 0x00
-
-/* Field definitions for */
-
-#define USB_IN_command__eol__BITNR 0 /* command macros */
-#define USB_IN_command__eol__WIDTH 1
-#define USB_IN_command__eol__no 0
-#define USB_IN_command__eol__yes 1
-
-#define USB_IN_command__intr__BITNR 3
-#define USB_IN_command__intr__WIDTH 1
-#define USB_IN_command__intr__no 0
-#define USB_IN_command__intr__yes 1
-
-#define USB_IN_status__eop__BITNR 1 /* status macros. */
-#define USB_IN_status__eop__WIDTH 1
-#define USB_IN_status__eop__no 0
-#define USB_IN_status__eop__yes 1
-
-#define USB_IN_status__eot__BITNR 5
-#define USB_IN_status__eot__WIDTH 1
-#define USB_IN_status__eot__no 0
-#define USB_IN_status__eot__yes 1
-
-#define USB_IN_status__error__BITNR 6
-#define USB_IN_status__error__WIDTH 1
-#define USB_IN_status__error__no 0
-#define USB_IN_status__error__yes 1
-
-#define USB_IN_status__nodata__BITNR 7
-#define USB_IN_status__nodata__WIDTH 1
-#define USB_IN_status__nodata__no 0
-#define USB_IN_status__nodata__yes 1
-
-#define USB_IN_status__epid__BITNR 8
-#define USB_IN_status__epid__WIDTH 5
-
-#define USB_EP_command__eol__BITNR 0
-#define USB_EP_command__eol__WIDTH 1
-#define USB_EP_command__eol__no 0
-#define USB_EP_command__eol__yes 1
-
-#define USB_EP_command__eof__BITNR 1
-#define USB_EP_command__eof__WIDTH 1
-#define USB_EP_command__eof__no 0
-#define USB_EP_command__eof__yes 1
-
-#define USB_EP_command__intr__BITNR 3
-#define USB_EP_command__intr__WIDTH 1
-#define USB_EP_command__intr__no 0
-#define USB_EP_command__intr__yes 1
-
-#define USB_EP_command__enable__BITNR 4
-#define USB_EP_command__enable__WIDTH 1
-#define USB_EP_command__enable__no 0
-#define USB_EP_command__enable__yes 1
-
-#define USB_EP_command__hw_valid__BITNR 5
-#define USB_EP_command__hw_valid__WIDTH 1
-#define USB_EP_command__hw_valid__no 0
-#define USB_EP_command__hw_valid__yes 1
-
-#define USB_EP_command__epid__BITNR 8
-#define USB_EP_command__epid__WIDTH 5
-
-#define USB_SB_command__eol__BITNR 0 /* command macros. */
-#define USB_SB_command__eol__WIDTH 1
-#define USB_SB_command__eol__no 0
-#define USB_SB_command__eol__yes 1
-
-#define USB_SB_command__eot__BITNR 1
-#define USB_SB_command__eot__WIDTH 1
-#define USB_SB_command__eot__no 0
-#define USB_SB_command__eot__yes 1
-
-#define USB_SB_command__intr__BITNR 3
-#define USB_SB_command__intr__WIDTH 1
-#define USB_SB_command__intr__no 0
-#define USB_SB_command__intr__yes 1
-
-#define USB_SB_command__tt__BITNR 4
-#define USB_SB_command__tt__WIDTH 2
-#define USB_SB_command__tt__zout 0
-#define USB_SB_command__tt__in 1
-#define USB_SB_command__tt__out 2
-#define USB_SB_command__tt__setup 3
-
-
-#define USB_SB_command__rem__BITNR 8
-#define USB_SB_command__rem__WIDTH 6
-
-#define USB_SB_command__full__BITNR 6
-#define USB_SB_command__full__WIDTH 1
-#define USB_SB_command__full__no 0
-#define USB_SB_command__full__yes 1
-
-#endif
---- a/drivers/usb/Makefile
-+++ b/drivers/usb/Makefile
-@@ -16,6 +16,7 @@ obj-$(CONFIG_USB_UHCI_HCD) += host/
+diff -Naur linux-2.6.26/drivers/usb/host/Makefile os/linux-2.6-tag--devboard-R2_20-5/drivers/usb/host/Makefile
+--- linux-2.6.26/drivers/usb/host/Makefile 2008-07-13 23:51:29.000000000 +0200
++++ os/linux-2.6-tag--devboard-R2_20-5/drivers/usb/host/Makefile 2008-08-21 10:39:44.000000000 +0200
+@@ -16,6 +16,7 @@
+ obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
+ obj-$(CONFIG_USB_SL811_HCD) += sl811-hcd.o
+ obj-$(CONFIG_USB_SL811_CS) += sl811_cs.o
++obj-$(CONFIG_ETRAX_ARCH_V10) += hc-crisv10.o
+ obj-$(CONFIG_USB_U132_HCD) += u132-hcd.o
+ obj-$(CONFIG_USB_R8A66597_HCD) += r8a66597-hcd.o
+ obj-$(CONFIG_USB_ISP1760_HCD) += isp1760.o
+diff -Naur linux-2.6.26/drivers/usb/Kconfig os/linux-2.6-tag--devboard-R2_20-5/drivers/usb/Kconfig
+--- linux-2.6.26/drivers/usb/Kconfig 2008-07-13 23:51:29.000000000 +0200
++++ os/linux-2.6-tag--devboard-R2_20-5/drivers/usb/Kconfig 2008-06-10 11:18:30.000000000 +0200
+@@ -21,6 +21,7 @@
+ default y if USB_ARCH_HAS_EHCI
+ default y if PCMCIA && !M32R # sl811_cs
+ default y if ARM # SL-811
++ default y if ETRAXFS
+ default y if SUPERH # r8a66597-hcd
+ default PCI
+
+diff -Naur linux-2.6.26/drivers/usb/Makefile os/linux-2.6-tag--devboard-R2_20-5/drivers/usb/Makefile
+--- linux-2.6.26/drivers/usb/Makefile 2008-07-13 23:51:29.000000000 +0200
++++ os/linux-2.6-tag--devboard-R2_20-5/drivers/usb/Makefile 2008-10-01 10:56:43.000000000 +0200
+@@ -16,6 +16,7 @@
obj-$(CONFIG_USB_SL811_HCD) += host/
obj-$(CONFIG_USB_U132_HCD) += host/
obj-$(CONFIG_USB_R8A66597_HCD) += host/
+obj-$(CONFIG_ETRAX_USB_HOST) += host/
- obj-$(CONFIG_USB_ACM) += class/
- obj-$(CONFIG_USB_PRINTER) += class/
---- a/drivers/usb/host/Makefile
-+++ b/drivers/usb/host/Makefile
-@@ -17,3 +17,5 @@ obj-$(CONFIG_USB_SL811_CS) += sl811_cs.o
- obj-$(CONFIG_USB_U132_HCD) += u132-hcd.o
- obj-$(CONFIG_USB_R8A66597_HCD) += r8a66597-hcd.o
+ obj-$(CONFIG_USB_C67X00_HCD) += c67x00/
-+#obj-$(CONFIG_USB_CARNEOL) += hc-crisv10.o
-+obj-$(CONFIG_ETRAX_USB_HOST) += hc-crisv10.o
---- /dev/null
-+++ b/drivers/usb/host/hc-cris-dbg.h
-@@ -0,0 +1,143 @@
-+
-+/* macros for debug output */
-+
-+#define hcd_dbg(hcd, fmt, args...) \
-+ dev_info(hcd->self.controller, fmt, ## args)
-+#define hcd_err(hcd, fmt, args...) \
-+ dev_err(hcd->self.controller, fmt, ## args)
-+#define hcd_info(hcd, fmt, args...) \
-+ dev_info(hcd->self.controller, fmt, ## args)
-+#define hcd_warn(hcd, fmt, args...) \
-+ dev_warn(hcd->self.controller, fmt, ## args)
-+
-+/*
-+#define devdrv_dbg(fmt, args...) \
-+ printk(KERN_INFO "usb_devdrv dbg: ");printk(fmt, ## args)
-+*/
-+#define devdrv_dbg(fmt, args...) {}
-+
-+#define devdrv_err(fmt, args...) \
-+ printk(KERN_ERR "usb_devdrv error: ");printk(fmt, ## args)
-+#define devdrv_info(fmt, args...) \
-+ printk(KERN_INFO "usb_devdrv: ");printk(fmt, ## args)
-+
-+#define irq_dbg(fmt, args...) \
-+ printk(KERN_INFO "crisv10_irq dbg: ");printk(fmt, ## args)
-+#define irq_err(fmt, args...) \
-+ printk(KERN_ERR "crisv10_irq error: ");printk(fmt, ## args)
-+#define irq_warn(fmt, args...) \
-+ printk(KERN_INFO "crisv10_irq warn: ");printk(fmt, ## args)
-+#define irq_info(fmt, args...) \
-+ printk(KERN_INFO "crisv10_hcd: ");printk(fmt, ## args)
-+
-+/*
-+#define rh_dbg(fmt, args...) \
-+ printk(KERN_DEBUG "crisv10_rh dbg: ");printk(fmt, ## args)
-+*/
-+#define rh_dbg(fmt, args...) {}
-+
-+#define rh_err(fmt, args...) \
-+ printk(KERN_ERR "crisv10_rh error: ");printk(fmt, ## args)
-+#define rh_warn(fmt, args...) \
-+ printk(KERN_INFO "crisv10_rh warning: ");printk(fmt, ## args)
-+#define rh_info(fmt, args...) \
-+ printk(KERN_INFO "crisv10_rh: ");printk(fmt, ## args)
-+
-+/*
-+#define tc_dbg(fmt, args...) \
-+ printk(KERN_INFO "crisv10_tc dbg: ");printk(fmt, ## args)
-+*/
-+#define tc_dbg(fmt, args...) {while(0){}}
-+
-+#define tc_err(fmt, args...) \
-+ printk(KERN_ERR "crisv10_tc error: ");printk(fmt, ## args)
-+/*
-+#define tc_warn(fmt, args...) \
-+ printk(KERN_INFO "crisv10_tc warning: ");printk(fmt, ## args)
-+*/
-+#define tc_warn(fmt, args...) {while(0){}}
-+
-+#define tc_info(fmt, args...) \
-+ printk(KERN_INFO "crisv10_tc: ");printk(fmt, ## args)
-+
-+
-+/* Debug print-outs for various traffic types */
-+
-+#define intr_warn(fmt, args...) \
-+ printk(KERN_INFO "crisv10_intr warning: ");printk(fmt, ## args)
-+
-+#define intr_dbg(fmt, args...) \
-+ printk(KERN_DEBUG "crisv10_intr dbg: ");printk(fmt, ## args)
-+/*
-+#define intr_dbg(fmt, args...) {while(0){}}
-+*/
-+
-+
-+#define isoc_err(fmt, args...) \
-+ printk(KERN_ERR "crisv10_isoc error: ");printk(fmt, ## args)
-+/*
-+#define isoc_warn(fmt, args...) \
-+ printk(KERN_INFO "crisv10_isoc warning: ");printk(fmt, ## args)
-+*/
-+#define isoc_warn(fmt, args...) {while(0){}}
-+
-+/*
-+#define isoc_dbg(fmt, args...) \
-+ printk(KERN_INFO "crisv10_isoc dbg: ");printk(fmt, ## args)
-+*/
-+#define isoc_dbg(fmt, args...) {while(0){}}
-+
-+/*
-+#define timer_warn(fmt, args...) \
-+ printk(KERN_INFO "crisv10_timer warning: ");printk(fmt, ## args)
-+*/
-+#define timer_warn(fmt, args...) {while(0){}}
-+
-+/*
-+#define timer_dbg(fmt, args...) \
-+ printk(KERN_INFO "crisv10_timer dbg: ");printk(fmt, ## args)
-+*/
-+#define timer_dbg(fmt, args...) {while(0){}}
-+
-+
-+/* Debug printouts for events related to late finishing of URBs */
-+
-+#define late_dbg(fmt, args...) \
-+ printk(KERN_INFO "crisv10_late dbg: ");printk(fmt, ## args)
-+/*
-+#define late_dbg(fmt, args...) {while(0){}}
-+*/
-+
-+#define late_warn(fmt, args...) \
-+ printk(KERN_INFO "crisv10_late warning: ");printk(fmt, ## args)
-+/*
-+#define errno_dbg(fmt, args...) \
-+ printk(KERN_INFO "crisv10_errno dbg: ");printk(fmt, ## args)
-+*/
-+#define errno_dbg(fmt, args...) {while(0){}}
-+
-+
-+#define dma_dbg(fmt, args...) \
-+ printk(KERN_INFO "crisv10_dma dbg: ");printk(fmt, ## args)
-+#define dma_err(fmt, args...) \
-+ printk(KERN_ERR "crisv10_dma error: ");printk(fmt, ## args)
-+#define dma_warn(fmt, args...) \
-+ printk(KERN_INFO "crisv10_dma warning: ");printk(fmt, ## args)
-+#define dma_info(fmt, args...) \
-+ printk(KERN_INFO "crisv10_dma: ");printk(fmt, ## args)
-+
-+
-+
-+#define str_dir(pipe) \
-+ (usb_pipeout(pipe) ? "out" : "in")
-+#define str_type(pipe) \
-+ ({ \
-+ char *s = "?"; \
-+ switch (usb_pipetype(pipe)) { \
-+ case PIPE_ISOCHRONOUS: s = "iso"; break; \
-+ case PIPE_INTERRUPT: s = "intr"; break; \
-+ case PIPE_CONTROL: s = "ctrl"; break; \
-+ case PIPE_BULK: s = "bulk"; break; \
-+ }; \
-+ s; \
-+ })
---- /dev/null
-+++ b/drivers/usb/host/hc-crisv10.c
-@@ -0,0 +1,4800 @@
-+/*
-+ *
-+ * ETRAX 100LX USB Host Controller Driver
-+ *
-+ * Copyright (C) 2005, 2006 Axis Communications AB
-+ *
-+ * Author: Konrad Eriksson <konrad.eriksson@axis.se>
-+ *
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/kernel.h>
-+#include <linux/init.h>
-+#include <linux/moduleparam.h>
-+#include <linux/spinlock.h>
-+#include <linux/usb.h>
-+#include <linux/platform_device.h>
-+
-+#include <asm/io.h>
-+#include <asm/irq.h>
-+#include <asm/arch/dma.h>
-+#include <asm/arch/io_interface_mux.h>
-+
-+#include "../core/hcd.h"
-+#include "../core/hub.h"
-+#include "hc-crisv10.h"
-+#include "hc-cris-dbg.h"
-+
-+
-+/***************************************************************************/
-+/***************************************************************************/
-+/* Host Controller settings */
-+/***************************************************************************/
-+/***************************************************************************/
-+
-+#define VERSION "1.00 hinko.4"
-+#define COPYRIGHT "(c) 2005, 2006 Axis Communications AB"
-+#define DESCRIPTION "ETRAX 100LX USB Host Controller (2.6.25-rc9 port)"
-+
-+#define ETRAX_USB_HC_IRQ USB_HC_IRQ_NBR
-+#define ETRAX_USB_RX_IRQ USB_DMA_RX_IRQ_NBR
-+#define ETRAX_USB_TX_IRQ USB_DMA_TX_IRQ_NBR
-+
-+/* Number of physical ports in Etrax 100LX */
-+#define USB_ROOT_HUB_PORTS 2
-+
-+const char hc_name[] = "hc-crisv10";
-+const char product_desc[] = DESCRIPTION;
-+
-+/* The number of epids is, among other things, used for pre-allocating
-+ ctrl, bulk and isoc EP descriptors (one for each epid).
-+ Assumed to be > 1 when initiating the DMA lists. */
-+#define NBR_OF_EPIDS 32
-+
-+/* Support interrupt traffic intervals up to 128 ms. */
-+#define MAX_INTR_INTERVAL 128
-+
-+/* If periodic traffic (intr or isoc) is to be used, then one entry in the EP
-+ table must be "invalid". By this we mean that we shouldn't care about epid
-+ attentions for this epid, or at least handle them differently from epid
-+ attentions for "valid" epids. This define determines which one to use
-+ (don't change it). */
-+#define INVALID_EPID 31
-+/* A special epid for the bulk dummys. */
-+#define DUMMY_EPID 30
-+
-+/* Module settings */
-+
-+MODULE_DESCRIPTION(DESCRIPTION);
-+MODULE_LICENSE("GPL");
-+MODULE_AUTHOR("Konrad Eriksson <konrad.eriksson@axis.se>");
-+
-+
-+/* Module parameters */
-+
-+/* 0 = No ports enabled
-+ 1 = Only port 1 enabled (on board ethernet on devboard)
-+ 2 = Only port 2 enabled (external connector on devboard)
-+ 3 = Both ports enabled
-+*/
-+static unsigned int ports = 3;
-+module_param(ports, uint, S_IRUGO);
-+MODULE_PARM_DESC(ports, "Bitmask indicating USB ports to use");
-+
-+
-+/***************************************************************************/
-+/***************************************************************************/
-+/* Shared global variables for this module */
-+/***************************************************************************/
-+/***************************************************************************/
-+
-+/* EP descriptor lists for non period transfers. Must be 32-bit aligned. */
-+static volatile struct USB_EP_Desc TxBulkEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
-+
-+static volatile struct USB_EP_Desc TxCtrlEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
-+
-+/* EP descriptor lists for period transfers. Must be 32-bit aligned. */
-+static volatile struct USB_EP_Desc TxIntrEPList[MAX_INTR_INTERVAL] __attribute__ ((aligned (4)));
-+static volatile struct USB_SB_Desc TxIntrSB_zout __attribute__ ((aligned (4)));
-+
-+static volatile struct USB_EP_Desc TxIsocEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
-+static volatile struct USB_SB_Desc TxIsocSB_zout __attribute__ ((aligned (4)));
-+
-+//static volatile struct USB_SB_Desc TxIsocSBList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
-+
-+/* After each enabled bulk EP IN we put two disabled EP descriptors with the eol flag set,
-+ causing the DMA to stop the DMA channel. The first of these two has the intr flag set, which
-+ gives us a dma8_sub0_descr interrupt. When we receive this, we advance the DMA one step in the
-+ EP list and then restart the bulk channel, thus forcing a switch between bulk EP descriptors
-+ in each frame. */
-+static volatile struct USB_EP_Desc TxBulkDummyEPList[NBR_OF_EPIDS][2] __attribute__ ((aligned (4)));
-+
-+/* List of URB pointers, where each points to the active URB for a epid.
-+ For Bulk, Ctrl and Intr this means which URB that currently is added to
-+ DMA lists (Isoc URBs are all directly added to DMA lists). As soon as
-+ URB has completed is the queue examined and the first URB in queue is
-+ removed and moved to the activeUrbList while its state change to STARTED and
-+ its transfer(s) gets added to DMA list (exception Isoc where URBs enter
-+ state STARTED directly and added transfers added to DMA lists). */
-+static struct urb *activeUrbList[NBR_OF_EPIDS];
-+
-+/* Additional software state info for each epid */
-+static struct etrax_epid epid_state[NBR_OF_EPIDS];
-+
-+/* Timer handles for bulk traffic timer used to avoid DMA bug where DMA stops
-+ even if there is new data waiting to be processed */
-+static struct timer_list bulk_start_timer = TIMER_INITIALIZER(NULL, 0, 0);
-+static struct timer_list bulk_eot_timer = TIMER_INITIALIZER(NULL, 0, 0);
-+
-+/* We want the start timer to expire before the eot timer, because the former
-+ might start traffic, thus making it unnecessary for the latter to time
-+ out. */
-+#define BULK_START_TIMER_INTERVAL (HZ/50) /* 20 ms */
-+#define BULK_EOT_TIMER_INTERVAL (HZ/16) /* 60 ms */
-+
-+/* Delay before a URB completion happen when it's scheduled to be delayed */
-+#define LATER_TIMER_DELAY (HZ/50) /* 20 ms */
-+
-+/* Simplifying macros for checking software state info of a epid */
-+/* ----------------------------------------------------------------------- */
-+#define epid_inuse(epid) epid_state[epid].inuse
-+#define epid_out_traffic(epid) epid_state[epid].out_traffic
-+#define epid_isoc(epid) (epid_state[epid].type == PIPE_ISOCHRONOUS ? 1 : 0)
-+#define epid_intr(epid) (epid_state[epid].type == PIPE_INTERRUPT ? 1 : 0)
-+
-+
-+/***************************************************************************/
-+/***************************************************************************/
-+/* DEBUG FUNCTIONS */
-+/***************************************************************************/
-+/***************************************************************************/
-+/* Note that these functions are always available in their "__" variants,
-+ for use in error situations. The "__" missing variants are controlled by
-+ the USB_DEBUG_DESC/USB_DEBUG_URB macros. */
-+static void __dump_urb(struct urb* purb)
-+{
-+ struct crisv10_urb_priv *urb_priv = purb->hcpriv;
-+ int urb_num = -1;
-+ if(urb_priv) {
-+ urb_num = urb_priv->urb_num;
-+ }
-+ printk("\nURB:0x%x[%d]\n", (unsigned int)purb, urb_num);
-+ printk("dev :0x%08lx\n", (unsigned long)purb->dev);
-+ printk("pipe :0x%08x\n", purb->pipe);
-+ printk("status :%d\n", purb->status);
-+ printk("transfer_flags :0x%08x\n", purb->transfer_flags);
-+ printk("transfer_buffer :0x%08lx\n", (unsigned long)purb->transfer_buffer);
-+ printk("transfer_buffer_length:%d\n", purb->transfer_buffer_length);
-+ printk("actual_length :%d\n", purb->actual_length);
-+ printk("setup_packet :0x%08lx\n", (unsigned long)purb->setup_packet);
-+ printk("start_frame :%d\n", purb->start_frame);
-+ printk("number_of_packets :%d\n", purb->number_of_packets);
-+ printk("interval :%d\n", purb->interval);
-+ printk("error_count :%d\n", purb->error_count);
-+ printk("context :0x%08lx\n", (unsigned long)purb->context);
-+ printk("complete :0x%08lx\n\n", (unsigned long)purb->complete);
-+}
-+
-+static void __dump_in_desc(volatile struct USB_IN_Desc *in)
-+{
-+ printk("\nUSB_IN_Desc at 0x%08lx\n", (unsigned long)in);
-+ printk(" sw_len : 0x%04x (%d)\n", in->sw_len, in->sw_len);
-+ printk(" command : 0x%04x\n", in->command);
-+ printk(" next : 0x%08lx\n", in->next);
-+ printk(" buf : 0x%08lx\n", in->buf);
-+ printk(" hw_len : 0x%04x (%d)\n", in->hw_len, in->hw_len);
-+ printk(" status : 0x%04x\n\n", in->status);
-+}
-+
-+static void __dump_sb_desc(volatile struct USB_SB_Desc *sb)
-+{
-+ char tt = (sb->command & 0x30) >> 4;
-+ char *tt_string;
-+
-+ switch (tt) {
-+ case 0:
-+ tt_string = "zout";
-+ break;
-+ case 1:
-+ tt_string = "in";
-+ break;
-+ case 2:
-+ tt_string = "out";
-+ break;
-+ case 3:
-+ tt_string = "setup";
-+ break;
-+ default:
-+ tt_string = "unknown (weird)";
-+ }
-+
-+ printk(" USB_SB_Desc at 0x%08lx ", (unsigned long)sb);
-+ printk(" command:0x%04x (", sb->command);
-+ printk("rem:%d ", (sb->command & 0x3f00) >> 8);
-+ printk("full:%d ", (sb->command & 0x40) >> 6);
-+ printk("tt:%d(%s) ", tt, tt_string);
-+ printk("intr:%d ", (sb->command & 0x8) >> 3);
-+ printk("eot:%d ", (sb->command & 0x2) >> 1);
-+ printk("eol:%d)", sb->command & 0x1);
-+ printk(" sw_len:0x%04x(%d)", sb->sw_len, sb->sw_len);
-+ printk(" next:0x%08lx", sb->next);
-+ printk(" buf:0x%08lx\n", sb->buf);
-+}
-+
-+
-+static void __dump_ep_desc(volatile struct USB_EP_Desc *ep)
-+{
-+ printk("USB_EP_Desc at 0x%08lx ", (unsigned long)ep);
-+ printk(" command:0x%04x (", ep->command);
-+ printk("ep_id:%d ", (ep->command & 0x1f00) >> 8);
-+ printk("enable:%d ", (ep->command & 0x10) >> 4);
-+ printk("intr:%d ", (ep->command & 0x8) >> 3);
-+ printk("eof:%d ", (ep->command & 0x2) >> 1);
-+ printk("eol:%d)", ep->command & 0x1);
-+ printk(" hw_len:0x%04x(%d)", ep->hw_len, ep->hw_len);
-+ printk(" next:0x%08lx", ep->next);
-+ printk(" sub:0x%08lx\n", ep->sub);
-+}
-+
-+static inline void __dump_ep_list(int pipe_type)
-+{
-+ volatile struct USB_EP_Desc *ep;
-+ volatile struct USB_EP_Desc *first_ep;
-+ volatile struct USB_SB_Desc *sb;
-+
-+ switch (pipe_type)
-+ {
-+ case PIPE_BULK:
-+ first_ep = &TxBulkEPList[0];
-+ break;
-+ case PIPE_CONTROL:
-+ first_ep = &TxCtrlEPList[0];
-+ break;
-+ case PIPE_INTERRUPT:
-+ first_ep = &TxIntrEPList[0];
-+ break;
-+ case PIPE_ISOCHRONOUS:
-+ first_ep = &TxIsocEPList[0];
-+ break;
-+ default:
-+ warn("Cannot dump unknown traffic type");
-+ return;
-+ }
-+ ep = first_ep;
-+
-+ printk("\n\nDumping EP list...\n\n");
-+
-+ do {
-+ __dump_ep_desc(ep);
-+ /* Cannot phys_to_virt on 0 as it turns into 80000000, which is != 0. */
-+ sb = ep->sub ? phys_to_virt(ep->sub) : 0;
-+ while (sb) {
-+ __dump_sb_desc(sb);
-+ sb = sb->next ? phys_to_virt(sb->next) : 0;
-+ }
-+ ep = (volatile struct USB_EP_Desc *)(phys_to_virt(ep->next));
-+
-+ } while (ep != first_ep);
-+}
-+
-+static inline void __dump_ept_data(int epid)
-+{
-+ unsigned long flags;
-+ __u32 r_usb_ept_data;
-+
-+ if (epid < 0 || epid > 31) {
-+ printk("Cannot dump ept data for invalid epid %d\n", epid);
-+ return;
-+ }
-+
-+ local_irq_save(flags);
-+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
-+ nop();
-+ r_usb_ept_data = *R_USB_EPT_DATA;
-+ local_irq_restore(flags);
-+
-+ printk(" R_USB_EPT_DATA = 0x%x for epid %d :\n", r_usb_ept_data, epid);
-+ if (r_usb_ept_data == 0) {
-+ /* No need for more detailed printing. */
-+ return;
-+ }
-+ printk(" valid : %d\n", (r_usb_ept_data & 0x80000000) >> 31);
-+ printk(" hold : %d\n", (r_usb_ept_data & 0x40000000) >> 30);
-+ printk(" error_count_in : %d\n", (r_usb_ept_data & 0x30000000) >> 28);
-+ printk(" t_in : %d\n", (r_usb_ept_data & 0x08000000) >> 27);
-+ printk(" low_speed : %d\n", (r_usb_ept_data & 0x04000000) >> 26);
-+ printk(" port : %d\n", (r_usb_ept_data & 0x03000000) >> 24);
-+ printk(" error_code : %d\n", (r_usb_ept_data & 0x00c00000) >> 22);
-+ printk(" t_out : %d\n", (r_usb_ept_data & 0x00200000) >> 21);
-+ printk(" error_count_out : %d\n", (r_usb_ept_data & 0x00180000) >> 19);
-+ printk(" max_len : %d\n", (r_usb_ept_data & 0x0003f800) >> 11);
-+ printk(" ep : %d\n", (r_usb_ept_data & 0x00000780) >> 7);
-+ printk(" dev : %d\n", (r_usb_ept_data & 0x0000003f));
-+}
-+
-+static inline void __dump_ept_data_iso(int epid)
-+{
-+ unsigned long flags;
-+ __u32 ept_data;
-+
-+ if (epid < 0 || epid > 31) {
-+ printk("Cannot dump ept data for invalid epid %d\n", epid);
-+ return;
-+ }
-+
-+ local_irq_save(flags);
-+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
-+ nop();
-+ ept_data = *R_USB_EPT_DATA_ISO;
-+ local_irq_restore(flags);
-+
-+ printk(" R_USB_EPT_DATA = 0x%x for epid %d :\n", ept_data, epid);
-+ if (ept_data == 0) {
-+ /* No need for more detailed printing. */
-+ return;
-+ }
-+ printk(" valid : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, valid,
-+ ept_data));
-+ printk(" port : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, port,
-+ ept_data));
-+ printk(" error_code : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code,
-+ ept_data));
-+ printk(" max_len : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, max_len,
-+ ept_data));
-+ printk(" ep : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, ep,
-+ ept_data));
-+ printk(" dev : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, dev,
-+ ept_data));
-+}
-+
-+static inline void __dump_ept_data_list(void)
-+{
-+ int i;
-+
-+ printk("Dumping the whole R_USB_EPT_DATA list\n");
-+
-+ for (i = 0; i < 32; i++) {
-+ __dump_ept_data(i);
-+ }
-+}
-+
-+static void debug_epid(int epid) {
-+ int i;
-+
-+ if(epid_isoc(epid)) {
-+ __dump_ept_data_iso(epid);
-+ } else {
-+ __dump_ept_data(epid);
-+ }
-+
-+ printk("Bulk:\n");
-+ for(i = 0; i < 32; i++) {
-+ if(IO_EXTRACT(USB_EP_command, epid, TxBulkEPList[i].command) ==
-+ epid) {
-+ printk("%d: ", i); __dump_ep_desc(&(TxBulkEPList[i]));
-+ }
-+ }
-+
-+ printk("Ctrl:\n");
-+ for(i = 0; i < 32; i++) {
-+ if(IO_EXTRACT(USB_EP_command, epid, TxCtrlEPList[i].command) ==
-+ epid) {
-+ printk("%d: ", i); __dump_ep_desc(&(TxCtrlEPList[i]));
-+ }
-+ }
-+
-+ printk("Intr:\n");
-+ for(i = 0; i < MAX_INTR_INTERVAL; i++) {
-+ if(IO_EXTRACT(USB_EP_command, epid, TxIntrEPList[i].command) ==
-+ epid) {
-+ printk("%d: ", i); __dump_ep_desc(&(TxIntrEPList[i]));
-+ }
-+ }
-+
-+ printk("Isoc:\n");
-+ for(i = 0; i < 32; i++) {
-+ if(IO_EXTRACT(USB_EP_command, epid, TxIsocEPList[i].command) ==
-+ epid) {
-+ printk("%d: ", i); __dump_ep_desc(&(TxIsocEPList[i]));
-+ }
-+ }
-+
-+ __dump_ept_data_list();
-+ __dump_ep_list(PIPE_INTERRUPT);
-+ printk("\n\n");
-+}
-+
-+
-+
-+char* hcd_status_to_str(__u8 bUsbStatus) {
-+ static char hcd_status_str[128];
-+ hcd_status_str[0] = '\0';
-+ if(bUsbStatus & IO_STATE(R_USB_STATUS, ourun, yes)) {
-+ strcat(hcd_status_str, "ourun ");
-+ }
-+ if(bUsbStatus & IO_STATE(R_USB_STATUS, perror, yes)) {
-+ strcat(hcd_status_str, "perror ");
-+ }
-+ if(bUsbStatus & IO_STATE(R_USB_STATUS, device_mode, yes)) {
-+ strcat(hcd_status_str, "device_mode ");
-+ }
-+ if(bUsbStatus & IO_STATE(R_USB_STATUS, host_mode, yes)) {
-+ strcat(hcd_status_str, "host_mode ");
-+ }
-+ if(bUsbStatus & IO_STATE(R_USB_STATUS, started, yes)) {
-+ strcat(hcd_status_str, "started ");
-+ }
-+ if(bUsbStatus & IO_STATE(R_USB_STATUS, running, yes)) {
-+ strcat(hcd_status_str, "running ");
-+ }
-+ return hcd_status_str;
-+}
-+
-+
-+char* sblist_to_str(struct USB_SB_Desc* sb_desc) {
-+ static char sblist_to_str_buff[128];
-+ char tmp[32], tmp2[32];
-+ sblist_to_str_buff[0] = '\0';
-+ while(sb_desc != NULL) {
-+ switch(IO_EXTRACT(USB_SB_command, tt, sb_desc->command)) {
-+ case 0: sprintf(tmp, "zout"); break;
-+ case 1: sprintf(tmp, "in"); break;
-+ case 2: sprintf(tmp, "out"); break;
-+ case 3: sprintf(tmp, "setup"); break;
-+ }
-+ sprintf(tmp2, "(%s %d)", tmp, sb_desc->sw_len);
-+ strcat(sblist_to_str_buff, tmp2);
-+ if(sb_desc->next != 0) {
-+ sb_desc = phys_to_virt(sb_desc->next);
-+ } else {
-+ sb_desc = NULL;
-+ }
-+ }
-+ return sblist_to_str_buff;
-+}
-+
-+char* port_status_to_str(__u16 wPortStatus) {
-+ static char port_status_str[128];
-+ port_status_str[0] = '\0';
-+ if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes)) {
-+ strcat(port_status_str, "connected ");
-+ }
-+ if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes)) {
-+ strcat(port_status_str, "enabled ");
-+ }
-+ if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, suspended, yes)) {
-+ strcat(port_status_str, "suspended ");
-+ }
-+ if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, reset, yes)) {
-+ strcat(port_status_str, "reset ");
-+ }
-+ if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, speed, full)) {
-+ strcat(port_status_str, "full-speed ");
-+ } else {
-+ strcat(port_status_str, "low-speed ");
-+ }
-+ return port_status_str;
-+}
-+
-+
-+char* endpoint_to_str(struct usb_endpoint_descriptor *ed) {
-+ static char endpoint_to_str_buff[128];
-+ char tmp[32];
-+ int epnum = ed->bEndpointAddress & 0x0F;
-+ int dir = ed->bEndpointAddress & 0x80;
-+ int type = ed->bmAttributes & 0x03;
-+ endpoint_to_str_buff[0] = '\0';
-+ sprintf(endpoint_to_str_buff, "ep:%d ", epnum);
-+ switch(type) {
-+ case 0:
-+ sprintf(tmp, " ctrl");
-+ break;
-+ case 1:
-+ sprintf(tmp, " isoc");
-+ break;
-+ case 2:
-+ sprintf(tmp, " bulk");
-+ break;
-+ case 3:
-+ sprintf(tmp, " intr");
-+ break;
-+ }
-+ strcat(endpoint_to_str_buff, tmp);
-+ if(dir) {
-+ sprintf(tmp, " in");
-+ } else {
-+ sprintf(tmp, " out");
-+ }
-+ strcat(endpoint_to_str_buff, tmp);
-+
-+ return endpoint_to_str_buff;
-+}
-+
-+/* Debug helper functions for Transfer Controller */
-+char* pipe_to_str(unsigned int pipe) {
-+ static char pipe_to_str_buff[128];
-+ char tmp[64];
-+ sprintf(pipe_to_str_buff, "dir:%s", str_dir(pipe));
-+ sprintf(tmp, " type:%s", str_type(pipe));
-+ strcat(pipe_to_str_buff, tmp);
-+
-+ sprintf(tmp, " dev:%d", usb_pipedevice(pipe));
-+ strcat(pipe_to_str_buff, tmp);
-+ sprintf(tmp, " ep:%d", usb_pipeendpoint(pipe));
-+ strcat(pipe_to_str_buff, tmp);
-+ return pipe_to_str_buff;
-+}
-+
-+
-+#define USB_DEBUG_DESC 1
-+
-+#ifdef USB_DEBUG_DESC
-+#define dump_in_desc(x) __dump_in_desc(x)
-+#define dump_sb_desc(...) __dump_sb_desc(...)
-+#define dump_ep_desc(x) __dump_ep_desc(x)
-+#define dump_ept_data(x) __dump_ept_data(x)
-+#else
-+#define dump_in_desc(...) do {} while (0)
-+#define dump_sb_desc(...) do {} while (0)
-+#define dump_ep_desc(...) do {} while (0)
-+#endif
-+
-+
-+/* Uncomment this to enable massive function call trace
-+ #define USB_DEBUG_TRACE */
-+//#define USB_DEBUG_TRACE 1
-+
-+#ifdef USB_DEBUG_TRACE
-+#define DBFENTER (printk(": Entering: %s\n", __FUNCTION__))
-+#define DBFEXIT (printk(": Exiting: %s\n", __FUNCTION__))
-+#else
-+#define DBFENTER do {} while (0)
-+#define DBFEXIT do {} while (0)
-+#endif
-+
-+#define CHECK_ALIGN(x) if (((__u32)(x)) & 0x00000003) \
-+{panic("Alignment check (DWORD) failed at %s:%s:%d\n", __FILE__, __FUNCTION__, __LINE__);}
-+
-+/* Most helpful debugging aid */
-+#define ASSERT(expr) ((void) ((expr) ? 0 : (err("assert failed at: %s %d",__FUNCTION__, __LINE__))))
-+
-+
-+/***************************************************************************/
-+/***************************************************************************/
-+/* Forward declarations */
-+/***************************************************************************/
-+/***************************************************************************/
-+void crisv10_hcd_epid_attn_irq(struct crisv10_irq_reg *reg);
-+void crisv10_hcd_port_status_irq(struct crisv10_irq_reg *reg);
-+void crisv10_hcd_ctl_status_irq(struct crisv10_irq_reg *reg);
-+void crisv10_hcd_isoc_eof_irq(struct crisv10_irq_reg *reg);
-+
-+void rh_port_status_change(__u16[]);
-+int rh_clear_port_feature(__u8, __u16);
-+int rh_set_port_feature(__u8, __u16);
-+static void rh_disable_port(unsigned int port);
-+
-+static void check_finished_bulk_tx_epids(struct usb_hcd *hcd,
-+ int timer);
-+
-+//static int tc_setup_epid(struct usb_host_endpoint *ep, struct urb *urb,
-+// int mem_flags);
-+static int tc_setup_epid(struct urb *urb, int mem_flags);
-+static void tc_free_epid(struct usb_host_endpoint *ep);
-+static int tc_allocate_epid(void);
-+static void tc_finish_urb(struct usb_hcd *hcd, struct urb *urb, int status);
-+static void tc_finish_urb_later(struct usb_hcd *hcd, struct urb *urb,
-+ int status);
-+
-+static int urb_priv_create(struct usb_hcd *hcd, struct urb *urb, int epid,
-+ int mem_flags);
-+static void urb_priv_free(struct usb_hcd *hcd, struct urb *urb);
-+
-+static inline struct urb *urb_list_first(int epid);
-+static inline void urb_list_add(struct urb *urb, int epid,
-+ int mem_flags);
-+static inline urb_entry_t *urb_list_entry(struct urb *urb, int epid);
-+static inline void urb_list_del(struct urb *urb, int epid);
-+static inline void urb_list_move_last(struct urb *urb, int epid);
-+static inline struct urb *urb_list_next(struct urb *urb, int epid);
-+
-+int create_sb_for_urb(struct urb *urb, int mem_flags);
-+int init_intr_urb(struct urb *urb, int mem_flags);
-+
-+static inline void etrax_epid_set(__u8 index, __u32 data);
-+static inline void etrax_epid_clear_error(__u8 index);
-+static inline void etrax_epid_set_toggle(__u8 index, __u8 dirout,
-+ __u8 toggle);
-+static inline __u8 etrax_epid_get_toggle(__u8 index, __u8 dirout);
-+static inline __u32 etrax_epid_get(__u8 index);
-+
-+/* We're accessing the same register position in Etrax so
-+ when we do full access the internal difference doesn't matter */
-+#define etrax_epid_iso_set(index, data) etrax_epid_set(index, data)
-+#define etrax_epid_iso_get(index) etrax_epid_get(index)
-+
-+
-+//static void tc_dma_process_isoc_urb(struct urb *urb);
-+static void tc_dma_process_queue(int epid);
-+static void tc_dma_unlink_intr_urb(struct urb *urb);
-+static irqreturn_t tc_dma_tx_interrupt(int irq, void *vhc);
-+static irqreturn_t tc_dma_rx_interrupt(int irq, void *vhc);
-+
-+static void tc_bulk_start_timer_func(unsigned long dummy);
-+static void tc_bulk_eot_timer_func(unsigned long dummy);
-+
-+
-+/*************************************************************/
-+/*************************************************************/
-+/* Host Controler Driver block */
-+/*************************************************************/
-+/*************************************************************/
-+
-+/* HCD operations */
-+static irqreturn_t crisv10_hcd_top_irq(int irq, void*);
-+static int crisv10_hcd_reset(struct usb_hcd *);
-+static int crisv10_hcd_start(struct usb_hcd *);
-+static void crisv10_hcd_stop(struct usb_hcd *);
-+#ifdef CONFIG_PM
-+static int crisv10_hcd_suspend(struct device *, u32, u32);
-+static int crisv10_hcd_resume(struct device *, u32);
-+#endif /* CONFIG_PM */
-+static int crisv10_hcd_get_frame(struct usb_hcd *);
-+
-+//static int tc_urb_enqueue(struct usb_hcd *, struct usb_host_endpoint *ep, struct urb *, gfp_t mem_flags);
-+static int tc_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags);
-+//static int tc_urb_dequeue(struct usb_hcd *, struct urb *);
-+static int tc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
-+static void tc_endpoint_disable(struct usb_hcd *, struct usb_host_endpoint *ep);
-+
-+static int rh_status_data_request(struct usb_hcd *, char *);
-+static int rh_control_request(struct usb_hcd *, u16, u16, u16, char*, u16);
-+
-+#ifdef CONFIG_PM
-+static int crisv10_hcd_hub_suspend(struct usb_hcd *);
-+static int crisv10_hcd_hub_resume(struct usb_hcd *);
-+#endif /* CONFIG_PM */
-+#ifdef CONFIG_USB_OTG
-+static int crisv10_hcd_start_port_reset(struct usb_hcd *, unsigned);
-+#endif /* CONFIG_USB_OTG */
-+
-+/* host controller driver interface */
-+static const struct hc_driver crisv10_hc_driver =
-+ {
-+ .description = hc_name,
-+ .product_desc = product_desc,
-+ .hcd_priv_size = sizeof(struct crisv10_hcd),
-+
-+ /* Attaching IRQ handler manualy in probe() */
-+ /* .irq = crisv10_hcd_irq, */
-+
-+ .flags = HCD_USB11,
-+
-+ /* called to init HCD and root hub */
-+ .reset = crisv10_hcd_reset,
-+ .start = crisv10_hcd_start,
-+
-+ /* cleanly make HCD stop writing memory and doing I/O */
-+ .stop = crisv10_hcd_stop,
-+
-+ /* return current frame number */
-+ .get_frame_number = crisv10_hcd_get_frame,
-+
-+
-+ /* Manage i/o requests via the Transfer Controller */
-+ .urb_enqueue = tc_urb_enqueue,
-+ .urb_dequeue = tc_urb_dequeue,
-+
-+ /* hw synch, freeing endpoint resources that urb_dequeue can't */
-+ .endpoint_disable = tc_endpoint_disable,
-+
-+
-+ /* Root Hub support */
-+ .hub_status_data = rh_status_data_request,
-+ .hub_control = rh_control_request,
-+#ifdef CONFIG_PM
-+ .hub_suspend = rh_suspend_request,
-+ .hub_resume = rh_resume_request,
-+#endif /* CONFIG_PM */
-+#ifdef CONFIG_USB_OTG
-+ .start_port_reset = crisv10_hcd_start_port_reset,
-+#endif /* CONFIG_USB_OTG */
-+ };
-+
-+
-+/*
-+ * conversion between pointers to a hcd and the corresponding
-+ * crisv10_hcd
-+ */
-+
-+static inline struct crisv10_hcd *hcd_to_crisv10_hcd(struct usb_hcd *hcd)
-+{
-+ return (struct crisv10_hcd *) hcd->hcd_priv;
-+}
-+
-+static inline struct usb_hcd *crisv10_hcd_to_hcd(struct crisv10_hcd *hcd)
-+{
-+ return container_of((void *) hcd, struct usb_hcd, hcd_priv);
-+}
-+
-+/* check if specified port is in use */
-+static inline int port_in_use(unsigned int port)
-+{
-+ return ports & (1 << port);
-+}
-+
-+/* number of ports in use */
-+static inline unsigned int num_ports(void)
-+{
-+ unsigned int i, num = 0;
-+ for (i = 0; i < USB_ROOT_HUB_PORTS; i++)
-+ if (port_in_use(i))
-+ num++;
-+ return num;
-+}
-+
-+/* map hub port number to the port number used internally by the HC */
-+static inline unsigned int map_port(unsigned int port)
-+{
-+ unsigned int i, num = 0;
-+ for (i = 0; i < USB_ROOT_HUB_PORTS; i++)
-+ if (port_in_use(i))
-+ if (++num == port)
-+ return i;
-+ return -1;
-+}
-+
-+/* size of descriptors in slab cache */
-+#ifndef MAX
-+#define MAX(x, y) ((x) > (y) ? (x) : (y))
-+#endif
-+
-+
-+/******************************************************************/
-+/* Hardware Interrupt functions */
-+/******************************************************************/
-+
-+/* Fast interrupt handler for HC */
-+static irqreturn_t crisv10_hcd_top_irq(int irq, void *vcd)
-+{
-+ struct usb_hcd *hcd = vcd;
-+ struct crisv10_irq_reg reg;
-+ __u32 irq_mask;
-+ unsigned long flags;
-+
-+ DBFENTER;
-+
-+ ASSERT(hcd != NULL);
-+ reg.hcd = hcd;
-+
-+ /* Turn of other interrupts while handling these sensitive cases */
-+ local_irq_save(flags);
-+
-+ /* Read out which interrupts that are flaged */
-+ irq_mask = *R_USB_IRQ_MASK_READ;
-+ reg.r_usb_irq_mask_read = irq_mask;
-+
-+ /* Reading R_USB_STATUS clears the ctl_status interrupt. Note that
-+ R_USB_STATUS must be read before R_USB_EPID_ATTN since reading the latter
-+ clears the ourun and perror fields of R_USB_STATUS. */
-+ reg.r_usb_status = *R_USB_STATUS;
-+
-+ /* Reading R_USB_EPID_ATTN clears the iso_eof, bulk_eot and epid_attn
-+ interrupts. */
-+ reg.r_usb_epid_attn = *R_USB_EPID_ATTN;
-+
-+ /* Reading R_USB_RH_PORT_STATUS_1 and R_USB_RH_PORT_STATUS_2 clears the
-+ port_status interrupt. */
-+ reg.r_usb_rh_port_status_1 = *R_USB_RH_PORT_STATUS_1;
-+ reg.r_usb_rh_port_status_2 = *R_USB_RH_PORT_STATUS_2;
-+
-+ /* Reading R_USB_FM_NUMBER clears the sof interrupt. */
-+ /* Note: the lower 11 bits contain the actual frame number, sent with each
-+ sof. */
-+ reg.r_usb_fm_number = *R_USB_FM_NUMBER;
-+
-+ /* Interrupts are handled in order of priority. */
-+ if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, port_status)) {
-+ crisv10_hcd_port_status_irq(®);
-+ }
-+ if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, epid_attn)) {
-+ crisv10_hcd_epid_attn_irq(®);
-+ }
-+ if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, ctl_status)) {
-+ crisv10_hcd_ctl_status_irq(®);
-+ }
-+ if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, iso_eof)) {
-+ crisv10_hcd_isoc_eof_irq(®);
-+ }
-+ if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, bulk_eot)) {
-+ /* Update/restart the bulk start timer since obviously the channel is
-+ running. */
-+ mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL);
-+ /* Update/restart the bulk eot timer since we just received an bulk eot
-+ interrupt. */
-+ mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
-+
-+ /* Check for finished bulk transfers on epids */
-+ check_finished_bulk_tx_epids(hcd, 0);
-+ }
-+ local_irq_restore(flags);
-+
-+ DBFEXIT;
-+ return IRQ_HANDLED;
-+}
-+
-+
-+void crisv10_hcd_epid_attn_irq(struct crisv10_irq_reg *reg) {
-+ struct usb_hcd *hcd = reg->hcd;
-+ struct crisv10_urb_priv *urb_priv;
-+ int epid;
-+ DBFENTER;
-+
-+ for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
-+ if (test_bit(epid, (void *)®->r_usb_epid_attn)) {
-+ struct urb *urb;
-+ __u32 ept_data;
-+ int error_code;
-+
-+ if (epid == DUMMY_EPID || epid == INVALID_EPID) {
-+ /* We definitely don't care about these ones. Besides, they are
-+ always disabled, so any possible disabling caused by the
-+ epid attention interrupt is irrelevant. */
-+ warn("Got epid_attn for INVALID_EPID or DUMMY_EPID (%d).", epid);
-+ continue;
-+ }
-+
-+ if(!epid_inuse(epid)) {
-+ irq_err("Epid attention on epid:%d that isn't in use\n", epid);
-+ printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
-+ debug_epid(epid);
-+ continue;
-+ }
-+
-+ /* Note that although there are separate R_USB_EPT_DATA and
-+ R_USB_EPT_DATA_ISO registers, they are located at the same address and
-+ are of the same size. In other words, this read should be ok for isoc
-+ also. */
-+ ept_data = etrax_epid_get(epid);
-+ error_code = IO_EXTRACT(R_USB_EPT_DATA, error_code, ept_data);
-+
-+ /* Get the active URB for this epid. We blatantly assume
-+ that only this URB could have caused the epid attention. */
-+ urb = activeUrbList[epid];
-+ if (urb == NULL) {
-+ irq_err("Attention on epid:%d error:%d with no active URB.\n",
-+ epid, error_code);
-+ printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
-+ debug_epid(epid);
-+ continue;
-+ }
-+
-+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
-+ ASSERT(urb_priv);
-+
-+ /* Using IO_STATE_VALUE on R_USB_EPT_DATA should be ok for isoc also. */
-+ if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
-+
-+ /* Isoc traffic doesn't have error_count_in/error_count_out. */
-+ if ((usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) &&
-+ (IO_EXTRACT(R_USB_EPT_DATA, error_count_in, ept_data) == 3 ||
-+ IO_EXTRACT(R_USB_EPT_DATA, error_count_out, ept_data) == 3)) {
-+ /* Check if URB allready is marked for late-finish, we can get
-+ several 3rd error for Intr traffic when a device is unplugged */
-+ if(urb_priv->later_data == NULL) {
-+ /* 3rd error. */
-+ irq_warn("3rd error for epid:%d (%s %s) URB:0x%x[%d]\n", epid,
-+ str_dir(urb->pipe), str_type(urb->pipe),
-+ (unsigned int)urb, urb_priv->urb_num);
-+
-+ tc_finish_urb_later(hcd, urb, -EPROTO);
-+ }
-+
-+ } else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) {
-+ irq_warn("Perror for epid:%d\n", epid);
-+ printk("FM_NUMBER: %d\n", reg->r_usb_fm_number & 0x7ff);
-+ printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
-+ __dump_urb(urb);
-+ debug_epid(epid);
-+
-+ if (!(ept_data & IO_MASK(R_USB_EPT_DATA, valid))) {
-+ /* invalid ep_id */
-+ panic("Perror because of invalid epid."
-+ " Deconfigured too early?");
-+ } else {
-+ /* past eof1, near eof, zout transfer, setup transfer */
-+ /* Dump the urb and the relevant EP descriptor. */
-+ panic("Something wrong with DMA descriptor contents."
-+ " Too much traffic inserted?");
-+ }
-+ } else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) {
-+ /* buffer ourun */
-+ printk("FM_NUMBER: %d\n", reg->r_usb_fm_number & 0x7ff);
-+ printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
-+ __dump_urb(urb);
-+ debug_epid(epid);
-+
-+ panic("Buffer overrun/underrun for epid:%d. DMA too busy?", epid);
-+ } else {
-+ irq_warn("Attention on epid:%d (%s %s) with no error code\n", epid,
-+ str_dir(urb->pipe), str_type(urb->pipe));
-+ printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
-+ __dump_urb(urb);
-+ debug_epid(epid);
-+ }
-+
-+ } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code,
-+ stall)) {
-+ /* Not really a protocol error, just says that the endpoint gave
-+ a stall response. Note that error_code cannot be stall for isoc. */
-+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-+ panic("Isoc traffic cannot stall");
-+ }
-+
-+ tc_dbg("Stall for epid:%d (%s %s) URB:0x%x\n", epid,
-+ str_dir(urb->pipe), str_type(urb->pipe), (unsigned int)urb);
-+ tc_finish_urb(hcd, urb, -EPIPE);
-+
-+ } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code,
-+ bus_error)) {
-+ /* Two devices responded to a transaction request. Must be resolved
-+ by software. FIXME: Reset ports? */
-+ panic("Bus error for epid %d."
-+ " Two devices responded to transaction request\n",
-+ epid);
-+
-+ } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code,
-+ buffer_error)) {
-+ /* DMA overrun or underrun. */
-+ irq_warn("Buffer overrun/underrun for epid:%d (%s %s)\n", epid,
-+ str_dir(urb->pipe), str_type(urb->pipe));
-+
-+ /* It seems that error_code = buffer_error in
-+ R_USB_EPT_DATA/R_USB_EPT_DATA_ISO and ourun = yes in R_USB_STATUS
-+ are the same error. */
-+ tc_finish_urb(hcd, urb, -EPROTO);
-+ } else {
-+ irq_warn("Unknown attention on epid:%d (%s %s)\n", epid,
-+ str_dir(urb->pipe), str_type(urb->pipe));
-+ dump_ept_data(epid);
-+ }
-+ }
-+ }
-+ DBFEXIT;
-+}
-+
-+void crisv10_hcd_port_status_irq(struct crisv10_irq_reg *reg)
-+{
-+ __u16 port_reg[USB_ROOT_HUB_PORTS];
-+ DBFENTER;
-+ port_reg[0] = reg->r_usb_rh_port_status_1;
-+ port_reg[1] = reg->r_usb_rh_port_status_2;
-+ rh_port_status_change(port_reg);
-+ DBFEXIT;
-+}
-+
-+void crisv10_hcd_isoc_eof_irq(struct crisv10_irq_reg *reg)
-+{
-+ int epid;
-+ struct urb *urb;
-+ struct crisv10_urb_priv *urb_priv;
-+
-+ DBFENTER;
-+
-+ for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
-+
-+ /* Only check epids that are in use, is valid and has SB list */
-+ if (!epid_inuse(epid) || epid == INVALID_EPID ||
-+ TxIsocEPList[epid].sub == 0 || epid == DUMMY_EPID) {
-+ /* Nothing here to see. */
-+ continue;
-+ }
-+ ASSERT(epid_isoc(epid));
-+
-+ /* Get the active URB for this epid (if any). */
-+ urb = activeUrbList[epid];
-+ if (urb == 0) {
-+ isoc_warn("Ignoring NULL urb for epid:%d\n", epid);
-+ continue;
-+ }
-+ if(!epid_out_traffic(epid)) {
-+ /* Sanity check. */
-+ ASSERT(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
-+
-+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
-+ ASSERT(urb_priv);
-+
-+ if (urb_priv->urb_state == NOT_STARTED) {
-+ /* If ASAP is not set and urb->start_frame is the current frame,
-+ start the transfer. */
-+ if (!(urb->transfer_flags & URB_ISO_ASAP) &&
-+ (urb->start_frame == (*R_USB_FM_NUMBER & 0x7ff))) {
-+ /* EP should not be enabled if we're waiting for start_frame */
-+ ASSERT((TxIsocEPList[epid].command &
-+ IO_STATE(USB_EP_command, enable, yes)) == 0);
-+
-+ isoc_warn("Enabling isoc IN EP descr for epid %d\n", epid);
-+ TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
-+
-+ /* This urb is now active. */
-+ urb_priv->urb_state = STARTED;
-+ continue;
-+ }
-+ }
-+ }
-+ }
-+
-+ DBFEXIT;
-+}
-+
-+void crisv10_hcd_ctl_status_irq(struct crisv10_irq_reg *reg)
-+{
-+ struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(reg->hcd);
-+
-+ DBFENTER;
-+ ASSERT(crisv10_hcd);
-+
-+ irq_dbg("ctr_status_irq, controller status: %s\n",
-+ hcd_status_to_str(reg->r_usb_status));
-+
-+ /* FIXME: What should we do if we get ourun or perror? Dump the EP and SB
-+ list for the corresponding epid? */
-+ if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) {
-+ panic("USB controller got ourun.");
-+ }
-+ if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) {
-+
-+ /* Before, etrax_usb_do_intr_recover was called on this epid if it was
-+ an interrupt pipe. I don't see how re-enabling all EP descriptors
-+ will help if there was a programming error. */
-+ panic("USB controller got perror.");
-+ }
-+
-+ /* Keep track of USB Controller, if it's running or not */
-+ if(reg->r_usb_status & IO_STATE(R_USB_STATUS, running, yes)) {
-+ crisv10_hcd->running = 1;
-+ } else {
-+ crisv10_hcd->running = 0;
-+ }
-+
-+ if (reg->r_usb_status & IO_MASK(R_USB_STATUS, device_mode)) {
-+ /* We should never operate in device mode. */
-+ panic("USB controller in device mode.");
-+ }
-+
-+ /* Set the flag to avoid getting "Unlink after no-IRQ? Controller is probably
-+ using the wrong IRQ" from hcd_unlink_urb() in drivers/usb/core/hcd.c */
-+ set_bit(HCD_FLAG_SAW_IRQ, ®->hcd->flags);
-+
-+ DBFEXIT;
-+}
-+
-+
-+/******************************************************************/
-+/* Host Controller interface functions */
-+/******************************************************************/
-+
-+static inline void crisv10_ready_wait(void) {
-+ volatile int timeout = 10000;
-+ /* Check the busy bit of USB controller in Etrax */
-+ while((*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)) &&
-+ (timeout-- > 0));
-+ if(timeout == 0) {
-+ warn("Timeout while waiting for USB controller to be idle\n");
-+ }
-+}
-+
-+/* reset host controller */
-+static int crisv10_hcd_reset(struct usb_hcd *hcd)
-+{
-+ DBFENTER;
-+ hcd_dbg(hcd, "reset\n");
-+
-+
-+ /* Reset the USB interface. */
-+ /*
-+ *R_USB_COMMAND =
-+ IO_STATE(R_USB_COMMAND, port_sel, nop) |
-+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
-+ IO_STATE(R_USB_COMMAND, ctrl_cmd, reset);
-+ nop();
-+ */
-+ DBFEXIT;
-+ return 0;
-+}
-+
-+/* start host controller */
-+static int crisv10_hcd_start(struct usb_hcd *hcd)
-+{
-+ DBFENTER;
-+ hcd_dbg(hcd, "start\n");
-+
-+ crisv10_ready_wait();
-+
-+ /* Start processing of USB traffic. */
-+ *R_USB_COMMAND =
-+ IO_STATE(R_USB_COMMAND, port_sel, nop) |
-+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
-+ IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
-+
-+ nop();
-+
-+ hcd->state = HC_STATE_RUNNING;
-+
-+ DBFEXIT;
-+ return 0;
-+}
-+
-+/* stop host controller */
-+static void crisv10_hcd_stop(struct usb_hcd *hcd)
-+{
-+ DBFENTER;
-+ hcd_dbg(hcd, "stop\n");
-+ crisv10_hcd_reset(hcd);
-+ DBFEXIT;
-+}
-+
-+/* return the current frame number */
-+static int crisv10_hcd_get_frame(struct usb_hcd *hcd)
-+{
-+ DBFENTER;
-+ DBFEXIT;
-+ return (*R_USB_FM_NUMBER & 0x7ff);
-+}
-+
-+#ifdef CONFIG_USB_OTG
-+
-+static int crisv10_hcd_start_port_reset(struct usb_hcd *hcd, unsigned port)
-+{
-+ return 0; /* no-op for now */
-+}
-+
-+#endif /* CONFIG_USB_OTG */
-+
-+
-+/******************************************************************/
-+/* Root Hub functions */
-+/******************************************************************/
-+
-+/* root hub status */
-+static const struct usb_hub_status rh_hub_status =
-+ {
-+ .wHubStatus = 0,
-+ .wHubChange = 0,
-+ };
-+
-+/* root hub descriptor */
-+static const u8 rh_hub_descr[] =
-+ {
-+ 0x09, /* bDescLength */
-+ 0x29, /* bDescriptorType */
-+ USB_ROOT_HUB_PORTS, /* bNbrPorts */
-+ 0x00, /* wHubCharacteristics */
-+ 0x00,
-+ 0x01, /* bPwrOn2pwrGood */
-+ 0x00, /* bHubContrCurrent */
-+ 0x00, /* DeviceRemovable */
-+ 0xff /* PortPwrCtrlMask */
-+ };
-+
-+/* Actual holder of root hub status*/
-+struct crisv10_rh rh;
-+
-+/* Initialize root hub data structures (called from dvdrv_hcd_probe()) */
-+int rh_init(void) {
-+ int i;
-+ /* Reset port status flags */
-+ for (i = 0; i < USB_ROOT_HUB_PORTS; i++) {
-+ rh.wPortChange[i] = 0;
-+ rh.wPortStatusPrev[i] = 0;
-+ }
-+ return 0;
-+}
-+
-+#define RH_FEAT_MASK ((1<<USB_PORT_FEAT_CONNECTION)|\
-+ (1<<USB_PORT_FEAT_ENABLE)|\
-+ (1<<USB_PORT_FEAT_SUSPEND)|\
-+ (1<<USB_PORT_FEAT_RESET))
-+
-+/* Handle port status change interrupt (called from bottom part interrupt) */
-+void rh_port_status_change(__u16 port_reg[]) {
-+ int i;
-+ __u16 wChange;
-+
-+ for(i = 0; i < USB_ROOT_HUB_PORTS; i++) {
-+ /* Xor out changes since last read, masked for important flags */
-+ wChange = (port_reg[i] & RH_FEAT_MASK) ^ rh.wPortStatusPrev[i];
-+ /* Or changes together with (if any) saved changes */
-+ rh.wPortChange[i] |= wChange;
-+ /* Save new status */
-+ rh.wPortStatusPrev[i] = port_reg[i];
-+
-+ if(wChange) {
-+ rh_dbg("Interrupt port_status change port%d: %s Current-status:%s\n", i+1,
-+ port_status_to_str(wChange),
-+ port_status_to_str(port_reg[i]));
-+ }
-+ }
-+}
-+
-+/* Construct port status change bitmap for the root hub */
-+static int rh_status_data_request(struct usb_hcd *hcd, char *buf)
-+{
-+ struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(hcd);
-+ unsigned int i;
-+
-+// DBFENTER;
-+
-+ /*
-+ * corresponds to hub status change EP (USB 2.0 spec section 11.13.4)
-+ * return bitmap indicating ports with status change
-+ */
-+ *buf = 0;
-+ spin_lock(&crisv10_hcd->lock);
-+ for (i = 1; i <= crisv10_hcd->num_ports; i++) {
-+ if (rh.wPortChange[map_port(i)]) {
-+ *buf |= (1 << i);
-+ rh_dbg("rh_status_data_request, change on port %d: %s Current Status: %s\n", i,
-+ port_status_to_str(rh.wPortChange[map_port(i)]),
-+ port_status_to_str(rh.wPortStatusPrev[map_port(i)]));
-+ }
-+ }
-+ spin_unlock(&crisv10_hcd->lock);
-+
-+// DBFEXIT;
-+
-+ return *buf == 0 ? 0 : 1;
-+}
-+
-+/* Handle a control request for the root hub (called from hcd_driver) */
-+static int rh_control_request(struct usb_hcd *hcd,
-+ u16 typeReq,
-+ u16 wValue,
-+ u16 wIndex,
-+ char *buf,
-+ u16 wLength) {
-+
-+ struct crisv10_hcd *crisv10_hcd = hcd_to_crisv10_hcd(hcd);
-+ int retval = 0;
-+ int len;
-+ DBFENTER;
-+
-+ switch (typeReq) {
-+ case GetHubDescriptor:
-+ rh_dbg("GetHubDescriptor\n");
-+ len = min_t(unsigned int, sizeof rh_hub_descr, wLength);
-+ memcpy(buf, rh_hub_descr, len);
-+ buf[2] = crisv10_hcd->num_ports;
-+ break;
-+ case GetHubStatus:
-+ rh_dbg("GetHubStatus\n");
-+ len = min_t(unsigned int, sizeof rh_hub_status, wLength);
-+ memcpy(buf, &rh_hub_status, len);
-+ break;
-+ case GetPortStatus:
-+ if (!wIndex || wIndex > crisv10_hcd->num_ports)
-+ goto error;
-+ rh_dbg("GetportStatus, port:%d change:%s status:%s\n", wIndex,
-+ port_status_to_str(rh.wPortChange[map_port(wIndex)]),
-+ port_status_to_str(rh.wPortStatusPrev[map_port(wIndex)]));
-+ *(u16 *) buf = cpu_to_le16(rh.wPortStatusPrev[map_port(wIndex)]);
-+ *(u16 *) (buf + 2) = cpu_to_le16(rh.wPortChange[map_port(wIndex)]);
-+ break;
-+ case SetHubFeature:
-+ rh_dbg("SetHubFeature\n");
-+ case ClearHubFeature:
-+ rh_dbg("ClearHubFeature\n");
-+ switch (wValue) {
-+ case C_HUB_OVER_CURRENT:
-+ case C_HUB_LOCAL_POWER:
-+ rh_warn("Not implemented hub request:%d \n", typeReq);
-+ /* not implemented */
-+ break;
-+ default:
-+ goto error;
-+ }
-+ break;
-+ case SetPortFeature:
-+ if (!wIndex || wIndex > crisv10_hcd->num_ports)
-+ goto error;
-+ if(rh_set_port_feature(map_port(wIndex), wValue))
-+ goto error;
-+ break;
-+ case ClearPortFeature:
-+ if (!wIndex || wIndex > crisv10_hcd->num_ports)
-+ goto error;
-+ if(rh_clear_port_feature(map_port(wIndex), wValue))
-+ goto error;
-+ break;
-+ default:
-+ rh_warn("Unknown hub request: %d\n", typeReq);
-+ error:
-+ retval = -EPIPE;
-+ }
-+ DBFEXIT;
-+ return retval;
-+}
-+
-+int rh_set_port_feature(__u8 bPort, __u16 wFeature) {
-+ __u8 bUsbCommand = 0;
-+ switch(wFeature) {
-+ case USB_PORT_FEAT_RESET:
-+ rh_dbg("SetPortFeature: reset\n");
-+ bUsbCommand |= IO_STATE(R_USB_COMMAND, port_cmd, reset);
-+ goto set;
-+ break;
-+ case USB_PORT_FEAT_SUSPEND:
-+ rh_dbg("SetPortFeature: suspend\n");
-+ bUsbCommand |= IO_STATE(R_USB_COMMAND, port_cmd, suspend);
-+ goto set;
-+ break;
-+ case USB_PORT_FEAT_POWER:
-+ rh_dbg("SetPortFeature: power\n");
-+ break;
-+ case USB_PORT_FEAT_C_CONNECTION:
-+ rh_dbg("SetPortFeature: c_connection\n");
-+ break;
-+ case USB_PORT_FEAT_C_RESET:
-+ rh_dbg("SetPortFeature: c_reset\n");
-+ break;
-+ case USB_PORT_FEAT_C_OVER_CURRENT:
-+ rh_dbg("SetPortFeature: c_over_current\n");
-+ break;
-+
-+ set:
-+ /* Select which port via the port_sel field */
-+ bUsbCommand |= IO_FIELD(R_USB_COMMAND, port_sel, bPort+1);
-+
-+ /* Make sure the controller isn't busy. */
-+ crisv10_ready_wait();
-+ /* Send out the actual command to the USB controller */
-+ *R_USB_COMMAND = bUsbCommand;
-+
-+ /* If port reset then also bring USB controller into running state */
-+ if(wFeature == USB_PORT_FEAT_RESET) {
-+ /* Wait a while for controller to first become started after port reset */
-+ udelay(12000); /* 12ms blocking wait */
-+
-+ /* Make sure the controller isn't busy. */
-+ crisv10_ready_wait();
-+
-+ /* If all enabled ports were disabled the host controller goes down into
-+ started mode, so we need to bring it back into the running state.
-+ (This is safe even if it's already in the running state.) */
-+ *R_USB_COMMAND =
-+ IO_STATE(R_USB_COMMAND, port_sel, nop) |
-+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
-+ IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
-+ }
-+
-+ break;
-+ default:
-+ rh_dbg("SetPortFeature: unknown feature\n");
-+ return -1;
-+ }
-+ return 0;
-+}
-+
-+int rh_clear_port_feature(__u8 bPort, __u16 wFeature) {
-+ switch(wFeature) {
-+ case USB_PORT_FEAT_ENABLE:
-+ rh_dbg("ClearPortFeature: enable\n");
-+ rh_disable_port(bPort);
-+ break;
-+ case USB_PORT_FEAT_SUSPEND:
-+ rh_dbg("ClearPortFeature: suspend\n");
-+ break;
-+ case USB_PORT_FEAT_POWER:
-+ rh_dbg("ClearPortFeature: power\n");
-+ break;
-+
-+ case USB_PORT_FEAT_C_ENABLE:
-+ rh_dbg("ClearPortFeature: c_enable\n");
-+ goto clear;
-+ case USB_PORT_FEAT_C_SUSPEND:
-+ rh_dbg("ClearPortFeature: c_suspend\n");
-+ goto clear;
-+ case USB_PORT_FEAT_C_CONNECTION:
-+ rh_dbg("ClearPortFeature: c_connection\n");
-+ goto clear;
-+ case USB_PORT_FEAT_C_OVER_CURRENT:
-+ rh_dbg("ClearPortFeature: c_over_current\n");
-+ goto clear;
-+ case USB_PORT_FEAT_C_RESET:
-+ rh_dbg("ClearPortFeature: c_reset\n");
-+ goto clear;
-+ clear:
-+ rh.wPortChange[bPort] &= ~(1 << (wFeature - 16));
-+ break;
-+ default:
-+ rh_dbg("ClearPortFeature: unknown feature\n");
-+ return -1;
-+ }
-+ return 0;
-+}
-+
-+
-+#ifdef CONFIG_PM
-+/* Handle a suspend request for the root hub (called from hcd_driver) */
-+static int rh_suspend_request(struct usb_hcd *hcd)
-+{
-+ return 0; /* no-op for now */
-+}
-+
-+/* Handle a resume request for the root hub (called from hcd_driver) */
-+static int rh_resume_request(struct usb_hcd *hcd)
-+{
-+ return 0; /* no-op for now */
-+}
-+#endif /* CONFIG_PM */
-+
-+
-+
-+/* Wrapper function for workaround port disable registers in USB controller */
-+static void rh_disable_port(unsigned int port) {
-+ volatile int timeout = 10000;
-+ volatile char* usb_portx_disable;
-+ switch(port) {
-+ case 0:
-+ usb_portx_disable = R_USB_PORT1_DISABLE;
-+ break;
-+ case 1:
-+ usb_portx_disable = R_USB_PORT2_DISABLE;
-+ break;
-+ default:
-+ /* Invalid port index */
-+ return;
-+ }
-+ /* Set disable flag in special register */
-+ *usb_portx_disable = IO_STATE(R_USB_PORT1_DISABLE, disable, yes);
-+ /* Wait until not enabled anymore */
-+ while((rh.wPortStatusPrev[port] &
-+ IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes)) &&
-+ (timeout-- > 0));
-+ if(timeout == 0) {
-+ warn("Timeout while waiting for port %d to become disabled\n", port);
-+ }
-+ /* clear disable flag in special register */
-+ *usb_portx_disable = IO_STATE(R_USB_PORT1_DISABLE, disable, no);
-+ rh_info("Physical port %d disabled\n", port+1);
-+}
-+
-+
-+/******************************************************************/
-+/* Transfer Controller (TC) functions */
-+/******************************************************************/
-+
-+/* FIXME: Should RX_BUF_SIZE be a config option, or maybe we should adjust it
-+ dynamically?
-+ To adjust it dynamically we would have to get an interrupt when we reach
-+ the end of the rx descriptor list, or when we get close to the end, and
-+ then allocate more descriptors. */
-+#define NBR_OF_RX_DESC 512
-+#define RX_DESC_BUF_SIZE 1024
-+#define RX_BUF_SIZE (NBR_OF_RX_DESC * RX_DESC_BUF_SIZE)
-+
-+
-+/* Local variables for Transfer Controller */
-+/* --------------------------------------- */
-+
-+/* This is a circular (double-linked) list of the active urbs for each epid.
-+ The head is never removed, and new urbs are linked onto the list as
-+ urb_entry_t elements. Don't reference urb_list directly; use the wrapper
-+ functions instead (which includes spin_locks) */
-+static struct list_head urb_list[NBR_OF_EPIDS];
-+
-+/* Read about the need and usage of this lock in submit_ctrl_urb. */
-+/* Lock for URB lists for each EPID */
-+static spinlock_t urb_list_lock;
-+
-+/* Lock for EPID array register (R_USB_EPT_x) in Etrax */
-+static spinlock_t etrax_epid_lock;
-+
-+/* Lock for dma8 sub0 handling */
-+static spinlock_t etrax_dma8_sub0_lock;
-+
-+/* DMA IN cache bug. Align the DMA IN buffers to 32 bytes, i.e. a cache line.
-+ Since RX_DESC_BUF_SIZE is 1024 is a multiple of 32, all rx buffers will be
-+ cache aligned. */
-+static volatile unsigned char RxBuf[RX_BUF_SIZE] __attribute__ ((aligned (32)));
-+static volatile struct USB_IN_Desc RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned (4)));
-+
-+/* Pointers into RxDescList. */
-+static volatile struct USB_IN_Desc *myNextRxDesc;
-+static volatile struct USB_IN_Desc *myLastRxDesc;
-+
-+/* A zout transfer makes a memory access at the address of its buf pointer,
-+ which means that setting this buf pointer to 0 will cause an access to the
-+ flash. In addition to this, setting sw_len to 0 results in a 16/32 bytes
-+ (depending on DMA burst size) transfer.
-+ Instead, we set it to 1, and point it to this buffer. */
-+static int zout_buffer[4] __attribute__ ((aligned (4)));
-+
-+/* Cache for allocating new EP and SB descriptors. */
-+//static kmem_cache_t *usb_desc_cache;
-+static struct kmem_cache *usb_desc_cache;
-+
-+/* Cache for the data allocated in the isoc descr top half. */
-+//static kmem_cache_t *isoc_compl_cache;
-+static struct kmem_cache *isoc_compl_cache;
-+
-+/* Cache for the data allocated when delayed finishing of URBs */
-+//static kmem_cache_t *later_data_cache;
-+static struct kmem_cache *later_data_cache;
-+
-+/* Counter to keep track of how many Isoc EP we have sat up. Used to enable
-+ and disable iso_eof interrupt. We only need these interrupts when we have
-+ Isoc data endpoints (consumes CPU cycles).
-+ FIXME: This could be more fine granular, so this interrupt is only enabled
-+ when we have a In Isoc URB not URB_ISO_ASAP flaged queued. */
-+static int isoc_epid_counter;
-+
-+/* Protecting wrapper functions for R_USB_EPT_x */
-+/* -------------------------------------------- */
-+static inline void etrax_epid_set(__u8 index, __u32 data) {
-+ unsigned long flags;
-+ spin_lock_irqsave(&etrax_epid_lock, flags);
-+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
-+ nop();
-+ *R_USB_EPT_DATA = data;
-+ spin_unlock_irqrestore(&etrax_epid_lock, flags);
-+}
-+
-+static inline void etrax_epid_clear_error(__u8 index) {
-+ unsigned long flags;
-+ spin_lock_irqsave(&etrax_epid_lock, flags);
-+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
-+ nop();
-+ *R_USB_EPT_DATA &=
-+ ~(IO_MASK(R_USB_EPT_DATA, error_count_in) |
-+ IO_MASK(R_USB_EPT_DATA, error_count_out) |
-+ IO_MASK(R_USB_EPT_DATA, error_code));
-+ spin_unlock_irqrestore(&etrax_epid_lock, flags);
-+}
-+
-+static inline void etrax_epid_set_toggle(__u8 index, __u8 dirout,
-+ __u8 toggle) {
-+ unsigned long flags;
-+ spin_lock_irqsave(&etrax_epid_lock, flags);
-+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
-+ nop();
-+ if(dirout) {
-+ *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_out);
-+ *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_out, toggle);
-+ } else {
-+ *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_in);
-+ *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_in, toggle);
-+ }
-+ spin_unlock_irqrestore(&etrax_epid_lock, flags);
-+}
-+
-+static inline __u8 etrax_epid_get_toggle(__u8 index, __u8 dirout) {
-+ unsigned long flags;
-+ __u8 toggle;
-+ spin_lock_irqsave(&etrax_epid_lock, flags);
-+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
-+ nop();
-+ if (dirout) {
-+ toggle = IO_EXTRACT(R_USB_EPT_DATA, t_out, *R_USB_EPT_DATA);
-+ } else {
-+ toggle = IO_EXTRACT(R_USB_EPT_DATA, t_in, *R_USB_EPT_DATA);
-+ }
-+ spin_unlock_irqrestore(&etrax_epid_lock, flags);
-+ return toggle;
-+}
-+
-+
-+static inline __u32 etrax_epid_get(__u8 index) {
-+ unsigned long flags;
-+ __u32 data;
-+ spin_lock_irqsave(&etrax_epid_lock, flags);
-+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
-+ nop();
-+ data = *R_USB_EPT_DATA;
-+ spin_unlock_irqrestore(&etrax_epid_lock, flags);
-+ return data;
-+}
-+
-+
-+
-+
-+/* Main functions for Transfer Controller */
-+/* -------------------------------------- */
-+
-+/* Init structs, memories and lists used by Transfer Controller */
-+int tc_init(struct usb_hcd *hcd) {
-+ int i;
-+ /* Clear software state info for all epids */
-+ memset(epid_state, 0, sizeof(struct etrax_epid) * NBR_OF_EPIDS);
-+
-+ /* Set Invalid and Dummy as being in use and disabled */
-+ epid_state[INVALID_EPID].inuse = 1;
-+ epid_state[DUMMY_EPID].inuse = 1;
-+ epid_state[INVALID_EPID].disabled = 1;
-+ epid_state[DUMMY_EPID].disabled = 1;
-+
-+ /* Clear counter for how many Isoc epids we have sat up */
-+ isoc_epid_counter = 0;
-+
-+ /* Initialize the urb list by initiating a head for each list.
-+ Also reset list hodling active URB for each epid */
-+ for (i = 0; i < NBR_OF_EPIDS; i++) {
-+ INIT_LIST_HEAD(&urb_list[i]);
-+ activeUrbList[i] = NULL;
-+ }
-+
-+ /* Init lock for URB lists */
-+ spin_lock_init(&urb_list_lock);
-+ /* Init lock for Etrax R_USB_EPT register */
-+ spin_lock_init(&etrax_epid_lock);
-+ /* Init lock for Etrax dma8 sub0 handling */
-+ spin_lock_init(&etrax_dma8_sub0_lock);
-+
-+ /* We use kmem_cache_* to make sure that all DMA desc. are dword aligned */
-+
-+ /* Note that we specify sizeof(struct USB_EP_Desc) as the size, but also
-+ allocate SB descriptors from this cache. This is ok since
-+ sizeof(struct USB_EP_Desc) == sizeof(struct USB_SB_Desc). */
-+// usb_desc_cache = kmem_cache_create("usb_desc_cache",
-+// sizeof(struct USB_EP_Desc), 0,
-+// SLAB_HWCACHE_ALIGN, 0, 0);
-+ usb_desc_cache = kmem_cache_create(
-+ "usb_desc_cache",
-+ sizeof(struct USB_EP_Desc),
-+ 0,
-+ SLAB_HWCACHE_ALIGN,
-+ NULL);
-+ if(usb_desc_cache == NULL) {
-+ return -ENOMEM;
-+ }
-+
-+ /* Create slab cache for speedy allocation of memory for isoc bottom-half
-+ interrupt handling */
-+// isoc_compl_cache =
-+// kmem_cache_create("isoc_compl_cache",
-+// sizeof(struct crisv10_isoc_complete_data),
-+// 0, SLAB_HWCACHE_ALIGN, 0, 0);
-+ isoc_compl_cache = kmem_cache_create(
-+ "isoc_compl_cache",
-+ sizeof(struct crisv10_isoc_complete_data),
-+ 0,
-+ SLAB_HWCACHE_ALIGN,
-+ NULL
-+ );
-+
-+ if(isoc_compl_cache == NULL) {
-+ return -ENOMEM;
-+ }
-+
-+ /* Create slab cache for speedy allocation of memory for later URB finish
-+ struct */
-+// later_data_cache =
-+// kmem_cache_create("later_data_cache",
-+// sizeof(struct urb_later_data),
-+// 0, SLAB_HWCACHE_ALIGN, 0, 0);
-+
-+ later_data_cache = kmem_cache_create(
-+ "later_data_cache",
-+ sizeof(struct urb_later_data),
-+ 0,
-+ SLAB_HWCACHE_ALIGN,
-+ NULL
-+ );
-+
-+ if(later_data_cache == NULL) {
-+ return -ENOMEM;
-+ }
-+
-+
-+ /* Initiate the bulk start timer. */
-+ init_timer(&bulk_start_timer);
-+ bulk_start_timer.expires = jiffies + BULK_START_TIMER_INTERVAL;
-+ bulk_start_timer.function = tc_bulk_start_timer_func;
-+ add_timer(&bulk_start_timer);
-+
-+
-+ /* Initiate the bulk eot timer. */
-+ init_timer(&bulk_eot_timer);
-+ bulk_eot_timer.expires = jiffies + BULK_EOT_TIMER_INTERVAL;
-+ bulk_eot_timer.function = tc_bulk_eot_timer_func;
-+ bulk_eot_timer.data = (unsigned long)hcd;
-+ add_timer(&bulk_eot_timer);
-+
-+ return 0;
-+}
-+
-+/* Uninitialize all resources used by Transfer Controller */
-+void tc_destroy(void) {
-+
-+ /* Destroy all slab cache */
-+ kmem_cache_destroy(usb_desc_cache);
-+ kmem_cache_destroy(isoc_compl_cache);
-+ kmem_cache_destroy(later_data_cache);
-+
-+ /* Remove timers */
-+ del_timer(&bulk_start_timer);
-+ del_timer(&bulk_eot_timer);
-+}
-+
-+static void restart_dma8_sub0(void) {
-+ unsigned long flags;
-+ spin_lock_irqsave(&etrax_dma8_sub0_lock, flags);
-+ /* Verify that the dma is not running */
-+ if ((*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd)) == 0) {
-+ struct USB_EP_Desc *ep = (struct USB_EP_Desc *)phys_to_virt(*R_DMA_CH8_SUB0_EP);
-+ while (DUMMY_EPID == IO_EXTRACT(USB_EP_command, epid, ep->command)) {
-+ ep = (struct USB_EP_Desc *)phys_to_virt(ep->next);
-+ }
-+ /* Advance the DMA to the next EP descriptor that is not a DUMMY_EPID.
-+ * ep->next is already a physical address. virt_to_phys is needed, see
-+ * http://mhonarc.axis.se/dev-etrax/msg08630.html
-+ */
-+ //*R_DMA_CH8_SUB0_EP = ep->next;
-+ *R_DMA_CH8_SUB0_EP = virt_to_phys(ep);
-+ /* Restart the DMA */
-+ *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start);
-+ }
-+ spin_unlock_irqrestore(&etrax_dma8_sub0_lock, flags);
-+}
-+
-+/* queue an URB with the transfer controller (called from hcd_driver) */
-+//static int tc_urb_enqueue(struct usb_hcd *hcd,
-+// struct usb_host_endpoint *ep,
-+// struct urb *urb,
-+// gfp_t mem_flags) {
-+static int tc_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)
-+{
-+ int epid;
-+ int retval;
-+// int bustime = 0;
-+ int maxpacket;
-+ unsigned long flags;
-+ struct crisv10_urb_priv *urb_priv;
-+ struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(hcd);
-+ DBFENTER;
-+
-+ if(!(crisv10_hcd->running)) {
-+ /* The USB Controller is not running, probably because no device is
-+ attached. No idea to enqueue URBs then */
-+ tc_warn("Rejected enqueueing of URB:0x%x because no dev attached\n",
-+ (unsigned int)urb);
-+ return -ENOENT;
-+ }
-+
-+ maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
-+
-+ /* hinko ignore usb_pipeisoc */
-+#if 0
-+ /* Special case check for In Isoc transfers. Specification states that each
-+ In Isoc transfer consists of one packet and therefore it should fit into
-+ the transfer-buffer of an URB.
-+ We do the check here to be sure (an invalid scenario can be produced with
-+ parameters to the usbtest suite) */
-+ if(usb_pipeisoc(urb->pipe) && usb_pipein(urb->pipe) &&
-+ (urb->transfer_buffer_length < maxpacket)) {
-+ tc_err("Submit In Isoc URB with buffer length:%d to pipe with maxpacketlen: %d\n", urb->transfer_buffer_length, maxpacket);
-+ return -EMSGSIZE;
-+ }
-+
-+ /* Check if there is enough bandwidth for periodic transfer */
-+ if(usb_pipeint(urb->pipe) || usb_pipeisoc(urb->pipe)) {
-+ /* only check (and later claim) if not already claimed */
-+ if (urb->bandwidth == 0) {
-+ bustime = usb_check_bandwidth(urb->dev, urb);
-+ if (bustime < 0) {
-+ tc_err("Not enough periodic bandwidth\n");
-+ return -ENOSPC;
-+ }
-+ }
-+ }
-+#endif
-+
-+ /* Check if there is a epid for URBs destination, if not this function
-+ set up one. */
-+ //epid = tc_setup_epid(ep, urb, mem_flags);
-+ epid = tc_setup_epid(urb, mem_flags);
-+ if (epid < 0) {
-+ tc_err("Failed setup epid:%d for URB:0x%x\n", epid, (unsigned int)urb);
-+ DBFEXIT;
-+ return -ENOMEM;
-+ }
-+
-+ if(urb == activeUrbList[epid]) {
-+ tc_err("Resubmition of allready active URB:0x%x\n", (unsigned int)urb);
-+ return -ENXIO;
-+ }
-+
-+ if(urb_list_entry(urb, epid)) {
-+ tc_err("Resubmition of allready queued URB:0x%x\n", (unsigned int)urb);
-+ return -ENXIO;
-+ }
-+
-+ /* If we actively have flaged endpoint as disabled then refuse submition */
-+ if(epid_state[epid].disabled) {
-+ return -ENOENT;
-+ }
-+
-+ /* Allocate and init HC-private data for URB */
-+ if(urb_priv_create(hcd, urb, epid, mem_flags) != 0) {
-+ DBFEXIT;
-+ return -ENOMEM;
-+ }
-+ urb_priv = urb->hcpriv;
-+
-+ tc_dbg("Enqueue URB:0x%x[%d] epid:%d (%s) bufflen:%d\n",
-+ (unsigned int)urb, urb_priv->urb_num, epid,
-+ pipe_to_str(urb->pipe), urb->transfer_buffer_length);
-+
-+ /* Create and link SBs required for this URB */
-+ retval = create_sb_for_urb(urb, mem_flags);
-+ if(retval != 0) {
-+ tc_err("Failed to create SBs for URB:0x%x[%d]\n", (unsigned int)urb,
-+ urb_priv->urb_num);
-+ urb_priv_free(hcd, urb);
-+ DBFEXIT;
-+ return retval;
-+ }
-+
-+ /* Init intr EP pool if this URB is a INTR transfer. This pool is later
-+ used when inserting EPs in the TxIntrEPList. We do the alloc here
-+ so we can't run out of memory later */
-+ if(usb_pipeint(urb->pipe)) {
-+ retval = init_intr_urb(urb, mem_flags);
-+ if(retval != 0) {
-+ tc_warn("Failed to init Intr URB\n");
-+ urb_priv_free(hcd, urb);
-+ DBFEXIT;
-+ return retval;
-+ }
-+ }
-+
-+ /* Disable other access when inserting USB */
-+
-+ /* BUG on sleeping inside int disabled if using local_irq_save/local_irq_restore
-+ * her - because urb_list_add() and tc_dma_process_queue() save irqs again !??!
-+ */
-+// local_irq_save(flags);
-+
-+ /* hinko ignore usb_pipeisoc */
-+#if 0
-+ /* Claim bandwidth, if needed */
-+ if(bustime) {
-+ usb_claim_bandwidth(urb->dev, urb, bustime, 0);
-+ }
-+
-+ /* Add URB to EP queue */
-+ urb_list_add(urb, epid, mem_flags);
-+
-+ if(usb_pipeisoc(urb->pipe)) {
-+ /* Special processing of Isoc URBs. */
-+ tc_dma_process_isoc_urb(urb);
-+ } else {
-+ /* Process EP queue for rest of the URB types (Bulk, Ctrl, Intr) */
-+ tc_dma_process_queue(epid);
-+ }
-+#endif
-+ /* Add URB to EP queue */
-+ urb_list_add(urb, epid, mem_flags);
-+
-+ /*hinko link/unlink urb -> ep */
-+ spin_lock_irqsave(&crisv10_hcd->lock, flags);
-+ //spin_lock(&crisv10_hcd->lock);
-+ retval = usb_hcd_link_urb_to_ep(hcd, urb);
-+ if (retval) {
-+ spin_unlock_irqrestore(&crisv10_hcd->lock, flags);
-+ tc_warn("Failed to link urb to ep\n");
-+ urb_priv_free(hcd, urb);
-+ DBFEXIT;
-+ return retval;
-+ }
-+ spin_unlock_irqrestore(&crisv10_hcd->lock, flags);
-+ //spin_unlock(&crisv10_hcd->lock);
-+
-+ /* Process EP queue for rest of the URB types (Bulk, Ctrl, Intr) */
-+ tc_dma_process_queue(epid);
-+
-+// local_irq_restore(flags);
-+
-+ DBFEXIT;
-+ return 0;
-+}
-+
-+/* remove an URB from the transfer controller queues (called from hcd_driver)*/
-+//static int tc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
-+static int tc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
-+{
-+ struct crisv10_urb_priv *urb_priv;
-+ unsigned long flags;
-+ int epid;
-+
-+ DBFENTER;
-+ /* Disable interrupts here since a descriptor interrupt for the isoc epid
-+ will modify the sb list. This could possibly be done more granular, but
-+ urb_dequeue should not be used frequently anyway.
-+ */
-+ local_irq_save(flags);
-+
-+ urb_priv = urb->hcpriv;
-+
-+ if (!urb_priv) {
-+ /* This happens if a device driver calls unlink on an urb that
-+ was never submitted (lazy driver) or if the urb was completed
-+ while dequeue was being called. */
-+ tc_warn("Dequeing of not enqueued URB:0x%x\n", (unsigned int)urb);
-+ local_irq_restore(flags);
-+ return 0;
-+ }
-+ epid = urb_priv->epid;
-+
-+ tc_warn("Dequeing %s URB:0x%x[%d] (%s %s epid:%d) status:%d %s\n",
-+ (urb == activeUrbList[epid]) ? "active" : "queued",
-+ (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
-+ str_type(urb->pipe), epid, urb->status,
-+ (urb_priv->later_data) ? "later-sched" : "");
-+
-+ /* For Bulk, Ctrl and Intr are only one URB active at a time. So any URB
-+ that isn't active can be dequeued by just removing it from the queue */
-+ if(usb_pipebulk(urb->pipe) || usb_pipecontrol(urb->pipe) ||
-+ usb_pipeint(urb->pipe)) {
-+
-+ /* Check if URB haven't gone further than the queue */
-+ if(urb != activeUrbList[epid]) {
-+ ASSERT(urb_priv->later_data == NULL);
-+ tc_warn("Dequeing URB:0x%x[%d] (%s %s epid:%d) from queue"
-+ " (not active)\n", (unsigned int)urb, urb_priv->urb_num,
-+ str_dir(urb->pipe), str_type(urb->pipe), epid);
-+
-+ /* Finish the URB with error status from USB core */
-+ tc_finish_urb(hcd, urb, urb->status);
-+ local_irq_restore(flags);
-+ return 0;
-+ }
-+ }
-+
-+ /* Set URB status to Unlink for handling when interrupt comes. */
-+ urb_priv->urb_state = UNLINK;
-+
-+ /* Differentiate dequeing of Bulk and Ctrl from Isoc and Intr */
-+ switch(usb_pipetype(urb->pipe)) {
-+ case PIPE_BULK:
-+ /* Check if EP still is enabled */
-+ if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
-+ /* The EP was enabled, disable it. */
-+ TxBulkEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-+ }
-+ /* Kicking dummy list out of the party. */
-+ TxBulkEPList[epid].next = virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]);
-+ break;
-+ case PIPE_CONTROL:
-+ /* Check if EP still is enabled */
-+ if (TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
-+ /* The EP was enabled, disable it. */
-+ TxCtrlEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-+ }
-+ break;
-+ case PIPE_ISOCHRONOUS:
-+ /* Disabling, busy-wait and unlinking of Isoc SBs will be done in
-+ finish_isoc_urb(). Because there might the case when URB is dequeued
-+ but there are other valid URBs waiting */
-+
-+ /* Check if In Isoc EP still is enabled */
-+ if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
-+ /* The EP was enabled, disable it. */
-+ TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-+ }
-+ break;
-+ case PIPE_INTERRUPT:
-+ /* Special care is taken for interrupt URBs. EPs are unlinked in
-+ tc_finish_urb */
-+ break;
-+ default:
-+ break;
-+ }
-+
-+ /* Asynchronous unlink, finish the URB later from scheduled or other
-+ event (data finished, error) */
-+ tc_finish_urb_later(hcd, urb, urb->status);
-+
-+ local_irq_restore(flags);
-+ DBFEXIT;
-+ return 0;
-+}
-+
-+
-+static void tc_sync_finish_epid(struct usb_hcd *hcd, int epid) {
-+ volatile int timeout = 10000;
-+ struct urb* urb;
-+ struct crisv10_urb_priv* urb_priv;
-+ unsigned long flags;
-+
-+ volatile struct USB_EP_Desc *first_ep; /* First EP in the list. */
-+ volatile struct USB_EP_Desc *curr_ep; /* Current EP, the iterator. */
-+ volatile struct USB_EP_Desc *next_ep; /* The EP after current. */
-+
-+ int type = epid_state[epid].type;
-+
-+ /* Setting this flag will cause enqueue() to return -ENOENT for new
-+ submitions on this endpoint and finish_urb() wont process queue further */
-+ epid_state[epid].disabled = 1;
-+
-+ switch(type) {
-+ case PIPE_BULK:
-+ /* Check if EP still is enabled */
-+ if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
-+ /* The EP was enabled, disable it. */
-+ TxBulkEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-+ tc_warn("sync_finish: Disabling EP for epid:%d\n", epid);
-+
-+ /* Do busy-wait until DMA not using this EP descriptor anymore */
-+ while((*R_DMA_CH8_SUB0_EP ==
-+ virt_to_phys(&TxBulkEPList[epid])) &&
-+ (timeout-- > 0));
-+ if(timeout == 0) {
-+ warn("Timeout while waiting for DMA-TX-Bulk to leave EP for"
-+ " epid:%d\n", epid);
-+ }
-+ }
-+ break;
-+
-+ case PIPE_CONTROL:
-+ /* Check if EP still is enabled */
-+ if (TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
-+ /* The EP was enabled, disable it. */
-+ TxCtrlEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-+ tc_warn("sync_finish: Disabling EP for epid:%d\n", epid);
-+
-+ /* Do busy-wait until DMA not using this EP descriptor anymore */
-+ while((*R_DMA_CH8_SUB1_EP ==
-+ virt_to_phys(&TxCtrlEPList[epid])) &&
-+ (timeout-- > 0));
-+ if(timeout == 0) {
-+ warn("Timeout while waiting for DMA-TX-Ctrl to leave EP for"
-+ " epid:%d\n", epid);
-+ }
-+ }
-+ break;
-+
-+ case PIPE_INTERRUPT:
-+ local_irq_save(flags);
-+ /* Disable all Intr EPs belonging to epid */
-+ first_ep = &TxIntrEPList[0];
-+ curr_ep = first_ep;
-+ do {
-+ next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
-+ if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
-+ /* Disable EP */
-+ next_ep->command &= ~IO_MASK(USB_EP_command, enable);
-+ }
-+ curr_ep = phys_to_virt(curr_ep->next);
-+ } while (curr_ep != first_ep);
-+
-+ local_irq_restore(flags);
-+ break;
-+
-+ case PIPE_ISOCHRONOUS:
-+ /* Check if EP still is enabled */
-+ if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
-+ tc_warn("sync_finish: Disabling Isoc EP for epid:%d\n", epid);
-+ /* The EP was enabled, disable it. */
-+ TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-+
-+ while((*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid])) &&
-+ (timeout-- > 0));
-+ if(timeout == 0) {
-+ warn("Timeout while waiting for DMA-TX-Isoc to leave EP for"
-+ " epid:%d\n", epid);
-+ }
-+ }
-+ break;
-+ }
-+
-+ local_irq_save(flags);
-+
-+ /* Finish if there is active URB for this endpoint */
-+ if(activeUrbList[epid] != NULL) {
-+ urb = activeUrbList[epid];
-+ urb_priv = urb->hcpriv;
-+ ASSERT(urb_priv);
-+ tc_warn("Sync finish %s URB:0x%x[%d] (%s %s epid:%d) status:%d %s\n",
-+ (urb == activeUrbList[epid]) ? "active" : "queued",
-+ (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
-+ str_type(urb->pipe), epid, urb->status,
-+ (urb_priv->later_data) ? "later-sched" : "");
-+
-+ tc_finish_urb(hcd, activeUrbList[epid], -ENOENT);
-+ ASSERT(activeUrbList[epid] == NULL);
-+ }
-+
-+ /* Finish any queued URBs for this endpoint. There won't be any resubmitions
-+ because epid_disabled causes enqueue() to fail for this endpoint */
-+ while((urb = urb_list_first(epid)) != NULL) {
-+ urb_priv = urb->hcpriv;
-+ ASSERT(urb_priv);
-+
-+ tc_warn("Sync finish %s URB:0x%x[%d] (%s %s epid:%d) status:%d %s\n",
-+ (urb == activeUrbList[epid]) ? "active" : "queued",
-+ (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
-+ str_type(urb->pipe), epid, urb->status,
-+ (urb_priv->later_data) ? "later-sched" : "");
-+
-+ tc_finish_urb(hcd, urb, -ENOENT);
-+ }
-+ epid_state[epid].disabled = 0;
-+ local_irq_restore(flags);
-+}
-+
-+/* free resources associated with an endpoint (called from hcd_driver) */
-+static void tc_endpoint_disable(struct usb_hcd *hcd,
-+ struct usb_host_endpoint *ep) {
-+ DBFENTER;
-+ /* Only free epid if it has been allocated. We get two endpoint_disable
-+ requests for ctrl endpoints so ignore the second one */
-+ if(ep->hcpriv != NULL) {
-+ struct crisv10_ep_priv *ep_priv = ep->hcpriv;
-+ int epid = ep_priv->epid;
-+ tc_warn("endpoint_disable ep:0x%x ep-priv:0x%x (%s) (epid:%d freed)\n",
-+ (unsigned int)ep, (unsigned int)ep->hcpriv,
-+ endpoint_to_str(&(ep->desc)), epid);
-+
-+ tc_sync_finish_epid(hcd, epid);
-+
-+ ASSERT(activeUrbList[epid] == NULL);
-+ ASSERT(list_empty(&urb_list[epid]));
-+
-+ tc_free_epid(ep);
-+ } else {
-+ tc_dbg("endpoint_disable ep:0x%x ep-priv:0x%x (%s)\n", (unsigned int)ep,
-+ (unsigned int)ep->hcpriv, endpoint_to_str(&(ep->desc)));
-+ }
-+ DBFEXIT;
-+}
-+
-+//static void tc_finish_urb_later_proc(void *data) {
-+static void tc_finish_urb_later_proc(struct work_struct *work) {
-+ unsigned long flags;
-+ //struct urb_later_data* uld = (struct urb_later_data*)data;
-+ struct urb_later_data* uld = container_of(work, struct urb_later_data, ws.work);
-+ local_irq_save(flags);
-+ if(uld->urb == NULL) {
-+ late_dbg("Later finish of URB = NULL (allready finished)\n");
-+ } else {
-+ struct crisv10_urb_priv* urb_priv = uld->urb->hcpriv;
-+ ASSERT(urb_priv);
-+ if(urb_priv->urb_num == uld->urb_num) {
-+ late_dbg("Later finish of URB:0x%x[%d]\n", (unsigned int)(uld->urb),
-+ urb_priv->urb_num);
-+ if(uld->status != uld->urb->status) {
-+ errno_dbg("Later-finish URB with status:%d, later-status:%d\n",
-+ uld->urb->status, uld->status);
-+ }
-+ if(uld != urb_priv->later_data) {
-+ panic("Scheduled uld not same as URBs uld\n");
-+ }
-+ tc_finish_urb(uld->hcd, uld->urb, uld->status);
-+ } else {
-+ late_warn("Ignoring later finish of URB:0x%x[%d]"
-+ ", urb_num doesn't match current URB:0x%x[%d]",
-+ (unsigned int)(uld->urb), uld->urb_num,
-+ (unsigned int)(uld->urb), urb_priv->urb_num);
-+ }
-+ }
-+ local_irq_restore(flags);
-+ kmem_cache_free(later_data_cache, uld);
-+}
-+
-+static void tc_finish_urb_later(struct usb_hcd *hcd, struct urb *urb,
-+ int status) {
-+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
-+ struct urb_later_data* uld;
-+
-+ ASSERT(urb_priv);
-+
-+ if(urb_priv->later_data != NULL) {
-+ /* Later-finish allready scheduled for this URB, just update status to
-+ return when finishing later */
-+ errno_dbg("Later-finish schedule change URB status:%d with new"
-+ " status:%d\n", urb_priv->later_data->status, status);
-+
-+ urb_priv->later_data->status = status;
-+ return;
-+ }
-+
-+ uld = kmem_cache_alloc(later_data_cache, GFP_ATOMIC);
-+ ASSERT(uld);
-+
-+ uld->hcd = hcd;
-+ uld->urb = urb;
-+ uld->urb_num = urb_priv->urb_num;
-+ uld->status = status;
-+
-+ //INIT_WORK(&uld->ws, tc_finish_urb_later_proc, uld);
-+ INIT_DELAYED_WORK(&uld->ws, tc_finish_urb_later_proc);
-+ urb_priv->later_data = uld;
-+
-+ /* Schedule the finishing of the URB to happen later */
-+ schedule_delayed_work(&uld->ws, LATER_TIMER_DELAY);
-+}
-+
-+ /* hinko ignore usb_pipeisoc */
-+#if 0
-+static void tc_finish_isoc_urb(struct usb_hcd *hcd, struct urb *urb,
-+ int status);
-+#endif
-+
-+static void tc_finish_urb(struct usb_hcd *hcd, struct urb *urb, int status) {
-+ struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(hcd);
-+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
-+ int epid;
-+ char toggle;
-+ int urb_num;
-+
-+ DBFENTER;
-+ ASSERT(urb_priv != NULL);
-+ epid = urb_priv->epid;
-+ urb_num = urb_priv->urb_num;
-+
-+ if(urb != activeUrbList[epid]) {
-+ if(urb_list_entry(urb, epid)) {
-+ /* Remove this URB from the list. Only happens when URB are finished
-+ before having been processed (dequeing) */
-+ urb_list_del(urb, epid);
-+ } else {
-+ tc_warn("Finishing of URB:0x%x[%d] neither active or in queue for"
-+ " epid:%d\n", (unsigned int)urb, urb_num, epid);
-+ }
-+ }
-+
-+ /* Cancel any pending later-finish of this URB */
-+ if(urb_priv->later_data) {
-+ urb_priv->later_data->urb = NULL;
-+ }
-+
-+ /* For an IN pipe, we always set the actual length, regardless of whether
-+ there was an error or not (which means the device driver can use the data
-+ if it wants to). */
-+ if(usb_pipein(urb->pipe)) {
-+ urb->actual_length = urb_priv->rx_offset;
-+ } else {
-+ /* Set actual_length for OUT urbs also; the USB mass storage driver seems
-+ to want that. */
-+ if (status == 0 && urb->status == -EINPROGRESS) {
-+ urb->actual_length = urb->transfer_buffer_length;
-+ } else {
-+ /* We wouldn't know of any partial writes if there was an error. */
-+ urb->actual_length = 0;
-+ }
-+ }
-+
-+
-+ /* URB status mangling */
-+ if(urb->status == -EINPROGRESS) {
-+ /* The USB core hasn't changed the status, let's set our finish status */
-+ urb->status = status;
-+
-+ if ((status == 0) && (urb->transfer_flags & URB_SHORT_NOT_OK) &&
-+ usb_pipein(urb->pipe) &&
-+ (urb->actual_length != urb->transfer_buffer_length)) {
-+ /* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's
-+ max length) is to be treated as an error. */
-+ errno_dbg("Finishing URB:0x%x[%d] with SHORT_NOT_OK flag and short"
-+ " data:%d\n", (unsigned int)urb, urb_num,
-+ urb->actual_length);
-+ urb->status = -EREMOTEIO;
-+ }
-+
-+ if(urb_priv->urb_state == UNLINK) {
-+ /* URB has been requested to be unlinked asynchronously */
-+ urb->status = -ECONNRESET;
-+ errno_dbg("Fixing unlink status of URB:0x%x[%d] to:%d\n",
-+ (unsigned int)urb, urb_num, urb->status);
-+ }
-+ } else {
-+ /* The USB Core wants to signal some error via the URB, pass it through */
-+ }
-+
-+ /* hinko ignore usb_pipeisoc */
-+#if 0
-+ /* use completely different finish function for Isoc URBs */
-+ if(usb_pipeisoc(urb->pipe)) {
-+ tc_finish_isoc_urb(hcd, urb, status);
-+ return;
-+ }
-+#endif
-+
-+ /* Do special unlinking of EPs for Intr traffic */
-+ if(usb_pipeint(urb->pipe)) {
-+ tc_dma_unlink_intr_urb(urb);
-+ }
-+
-+ /* hinko ignore usb_pipeisoc */
-+#if 0
-+ /* Release allocated bandwidth for periodic transfers */
-+ if(usb_pipeint(urb->pipe) || usb_pipeisoc(urb->pipe))
-+ usb_release_bandwidth(urb->dev, urb, 0);
-+#endif
-+
-+ /* This URB is active on EP */
-+ if(urb == activeUrbList[epid]) {
-+ /* We need to fiddle with the toggle bits because the hardware doesn't do
-+ it for us. */
-+ toggle = etrax_epid_get_toggle(epid, usb_pipeout(urb->pipe));
-+ usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
-+ usb_pipeout(urb->pipe), toggle);
-+
-+ /* Checks for Ctrl and Bulk EPs */
-+ switch(usb_pipetype(urb->pipe)) {
-+ case PIPE_BULK:
-+ /* Check so Bulk EP realy is disabled before finishing active URB */
-+ ASSERT((TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) ==
-+ IO_STATE(USB_EP_command, enable, no));
-+ /* Disable sub-pointer for EP to avoid next tx_interrupt() to
-+ process Bulk EP. */
-+ TxBulkEPList[epid].sub = 0;
-+ /* No need to wait for the DMA before changing the next pointer.
-+ The modulo NBR_OF_EPIDS isn't actually necessary, since we will never use
-+ the last one (INVALID_EPID) for actual traffic. */
-+ TxBulkEPList[epid].next =
-+ virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]);
-+ break;
-+ case PIPE_CONTROL:
-+ /* Check so Ctrl EP realy is disabled before finishing active URB */
-+ ASSERT((TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) ==
-+ IO_STATE(USB_EP_command, enable, no));
-+ /* Disable sub-pointer for EP to avoid next tx_interrupt() to
-+ process Ctrl EP. */
-+ TxCtrlEPList[epid].sub = 0;
-+ break;
-+ }
-+ }
-+
-+ /* Free HC-private URB data*/
-+ urb_priv_free(hcd, urb);
-+
-+ if(urb->status) {
-+ errno_dbg("finish_urb (URB:0x%x[%d] %s %s) (data:%d) status:%d\n",
-+ (unsigned int)urb, urb_num, str_dir(urb->pipe),
-+ str_type(urb->pipe), urb->actual_length, urb->status);
-+ } else {
-+ tc_dbg("finish_urb (URB:0x%x[%d] %s %s) (data:%d) status:%d\n",
-+ (unsigned int)urb, urb_num, str_dir(urb->pipe),
-+ str_type(urb->pipe), urb->actual_length, urb->status);
-+ }
-+
-+ /* If we just finished an active URB, clear active pointer. */
-+ if (urb == activeUrbList[epid]) {
-+ /* Make URB not active on EP anymore */
-+ activeUrbList[epid] = NULL;
-+
-+ if(urb->status == 0) {
-+ /* URB finished sucessfully, process queue to see if there are any more
-+ URBs waiting before we call completion function.*/
-+ if(crisv10_hcd->running) {
-+ /* Only process queue if USB controller is running */
-+ tc_dma_process_queue(epid);
-+ } else {
-+ tc_warn("No processing of queue for epid:%d, USB Controller not"
-+ " running\n", epid);
-+ }
-+ }
-+ }
-+
-+ /* Hand the URB from HCD to its USB device driver, using its completion
-+ functions */
-+// usb_hcd_giveback_urb (hcd, urb);
-+ /**
-+ * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue
-+ * @hcd: host controller to which @urb was submitted
-+ * @urb: URB being unlinked
-+ *
-+ * Host controller drivers should call this routine before calling
-+ * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and
-+ * interrupts must be disabled. The actions carried out here are required
-+ * for URB completion.
-+ */
-+
-+ /*hinko link/unlink urb -> ep */
-+ //spin_lock(&crisv10_hcd->lock);
-+ unsigned long flags;
-+ spin_lock_irqsave(&crisv10_hcd->lock, flags);
-+ usb_hcd_unlink_urb_from_ep(hcd, urb);
-+ usb_hcd_giveback_urb(hcd, urb, status);
-+ //spin_unlock(&crisv10_hcd->lock);
-+ spin_unlock_irqrestore(&crisv10_hcd->lock, flags);
-+
-+ /* Check the queue once more if the URB returned with error, because we
-+ didn't do it before the completion function because the specification
-+ states that the queue should not restart until all it's unlinked
-+ URBs have been fully retired, with the completion functions run */
-+ if(crisv10_hcd->running) {
-+ /* Only process queue if USB controller is running */
-+ tc_dma_process_queue(epid);
-+ } else {
-+ tc_warn("No processing of queue for epid:%d, USB Controller not running\n",
-+ epid);
-+ }
-+
-+ DBFEXIT;
-+}
-+
-+ /* hinko ignore usb_pipeisoc */
-+#if 0
-+static void tc_finish_isoc_urb(struct usb_hcd *hcd, struct urb *urb,
-+ int status) {
-+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
-+ int epid, i;
-+ volatile int timeout = 10000;
-+
-+ ASSERT(urb_priv);
-+ epid = urb_priv->epid;
-+
-+ ASSERT(usb_pipeisoc(urb->pipe));
-+
-+ /* Set that all isoc packets have status and length set before
-+ completing the urb. */
-+ for (i = urb_priv->isoc_packet_counter; i < urb->number_of_packets; i++){
-+ urb->iso_frame_desc[i].actual_length = 0;
-+ urb->iso_frame_desc[i].status = -EPROTO;
-+ }
-+
-+ /* Check if the URB is currently active (done or error) */
-+ if(urb == activeUrbList[epid]) {
-+ /* Check if there are another In Isoc URB queued for this epid */
-+ if (!list_empty(&urb_list[epid])&& !epid_state[epid].disabled) {
-+ /* Move it from queue to active and mark it started so Isoc transfers
-+ won't be interrupted.
-+ All Isoc URBs data transfers are already added to DMA lists so we
-+ don't have to insert anything in DMA lists here. */
-+ activeUrbList[epid] = urb_list_first(epid);
-+ ((struct crisv10_urb_priv *)(activeUrbList[epid]->hcpriv))->urb_state =
-+ STARTED;
-+ urb_list_del(activeUrbList[epid], epid);
-+
-+ if(urb->status) {
-+ errno_dbg("finish_isoc_urb (URB:0x%x[%d] %s %s) (%d of %d packets)"
-+ " status:%d, new waiting URB:0x%x[%d]\n",
-+ (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
-+ str_type(urb->pipe), urb_priv->isoc_packet_counter,
-+ urb->number_of_packets, urb->status,
-+ (unsigned int)activeUrbList[epid],
-+ ((struct crisv10_urb_priv *)(activeUrbList[epid]->hcpriv))->urb_num);
-+ }
-+
-+ } else { /* No other URB queued for this epid */
-+ if(urb->status) {
-+ errno_dbg("finish_isoc_urb (URB:0x%x[%d] %s %s) (%d of %d packets)"
-+ " status:%d, no new URB waiting\n",
-+ (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
-+ str_type(urb->pipe), urb_priv->isoc_packet_counter,
-+ urb->number_of_packets, urb->status);
-+ }
-+
-+ /* Check if EP is still enabled, then shut it down. */
-+ if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
-+ isoc_dbg("Isoc EP enabled for epid:%d, disabling it\n", epid);
-+
-+ /* Should only occur for In Isoc EPs where SB isn't consumed. */
-+ ASSERT(usb_pipein(urb->pipe));
-+
-+ /* Disable it and wait for it to stop */
-+ TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-+
-+ /* Ah, the luxury of busy-wait. */
-+ while((*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid])) &&
-+ (timeout-- > 0));
-+ if(timeout == 0) {
-+ warn("Timeout while waiting for DMA-TX-Isoc to leave EP for epid:%d\n", epid);
-+ }
-+ }
-+
-+ /* Unlink SB to say that epid is finished. */
-+ TxIsocEPList[epid].sub = 0;
-+ TxIsocEPList[epid].hw_len = 0;
-+
-+ /* No URB active for EP anymore */
-+ activeUrbList[epid] = NULL;
-+ }
-+ } else { /* Finishing of not active URB (queued up with SBs thought) */
-+ isoc_warn("finish_isoc_urb (URB:0x%x %s) (%d of %d packets) status:%d,"
-+ " SB queued but not active\n",
-+ (unsigned int)urb, str_dir(urb->pipe),
-+ urb_priv->isoc_packet_counter, urb->number_of_packets,
-+ urb->status);
-+ if(usb_pipeout(urb->pipe)) {
-+ /* Finishing of not yet active Out Isoc URB needs unlinking of SBs. */
-+ struct USB_SB_Desc *iter_sb, *prev_sb, *next_sb;
-+
-+ iter_sb = TxIsocEPList[epid].sub ?
-+ phys_to_virt(TxIsocEPList[epid].sub) : 0;
-+ prev_sb = 0;
-+
-+ /* SB that is linked before this URBs first SB */
-+ while (iter_sb && (iter_sb != urb_priv->first_sb)) {
-+ prev_sb = iter_sb;
-+ iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
-+ }
-+
-+ if (iter_sb == 0) {
-+ /* Unlink of the URB currently being transmitted. */
-+ prev_sb = 0;
-+ iter_sb = TxIsocEPList[epid].sub ? phys_to_virt(TxIsocEPList[epid].sub) : 0;
-+ }
-+
-+ while (iter_sb && (iter_sb != urb_priv->last_sb)) {
-+ iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
-+ }
-+
-+ if (iter_sb) {
-+ next_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
-+ } else {
-+ /* This should only happen if the DMA has completed
-+ processing the SB list for this EP while interrupts
-+ are disabled. */
-+ isoc_dbg("Isoc urb not found, already sent?\n");
-+ next_sb = 0;
-+ }
-+ if (prev_sb) {
-+ prev_sb->next = next_sb ? virt_to_phys(next_sb) : 0;
-+ } else {
-+ TxIsocEPList[epid].sub = next_sb ? virt_to_phys(next_sb) : 0;
-+ }
-+ }
-+ }
-+
-+ /* Free HC-private URB data*/
-+ urb_priv_free(hcd, urb);
-+
-+ usb_release_bandwidth(urb->dev, urb, 0);
-+
-+ /* Hand the URB from HCD to its USB device driver, using its completion
-+ functions */
-+ usb_hcd_giveback_urb (hcd, urb);
-+}
-+#endif
-+
-+static __u32 urb_num = 0;
-+
-+/* allocate and initialize URB private data */
-+static int urb_priv_create(struct usb_hcd *hcd, struct urb *urb, int epid,
-+ int mem_flags) {
-+ struct crisv10_urb_priv *urb_priv;
-+
-+ urb_priv = kmalloc(sizeof *urb_priv, mem_flags);
-+ if (!urb_priv)
-+ return -ENOMEM;
-+ memset(urb_priv, 0, sizeof *urb_priv);
-+
-+ urb_priv->epid = epid;
-+ urb_priv->urb_state = NOT_STARTED;
-+
-+ urb->hcpriv = urb_priv;
-+ /* Assign URB a sequence number, and increment counter */
-+ urb_priv->urb_num = urb_num;
-+ urb_num++;
-+ return 0;
-+}
-+
-+/* free URB private data */
-+static void urb_priv_free(struct usb_hcd *hcd, struct urb *urb) {
-+ int i;
-+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
-+ ASSERT(urb_priv != 0);
-+
-+ /* Check it has any SBs linked that needs to be freed*/
-+ if(urb_priv->first_sb != NULL) {
-+ struct USB_SB_Desc *next_sb, *first_sb, *last_sb;
-+ int i = 0;
-+ first_sb = urb_priv->first_sb;
-+ last_sb = urb_priv->last_sb;
-+ ASSERT(last_sb);
-+ while(first_sb != last_sb) {
-+ next_sb = (struct USB_SB_Desc *)phys_to_virt(first_sb->next);
-+ kmem_cache_free(usb_desc_cache, first_sb);
-+ first_sb = next_sb;
-+ i++;
-+ }
-+ kmem_cache_free(usb_desc_cache, last_sb);
-+ i++;
-+ }
-+
-+ /* Check if it has any EPs in its Intr pool that also needs to be freed */
-+ if(urb_priv->intr_ep_pool_length > 0) {
-+ for(i = 0; i < urb_priv->intr_ep_pool_length; i++) {
-+ kfree(urb_priv->intr_ep_pool[i]);
-+ }
-+ /*
-+ tc_dbg("Freed %d EPs from URB:0x%x EP pool\n",
-+ urb_priv->intr_ep_pool_length, (unsigned int)urb);
-+ */
-+ }
-+
-+ kfree(urb_priv);
-+ urb->hcpriv = NULL;
-+}
-+
-+static int ep_priv_create(struct usb_host_endpoint *ep, int mem_flags) {
-+ struct crisv10_ep_priv *ep_priv;
-+
-+ ep_priv = kmalloc(sizeof *ep_priv, mem_flags);
-+ if (!ep_priv)
-+ return -ENOMEM;
-+ memset(ep_priv, 0, sizeof *ep_priv);
-+
-+ ep->hcpriv = ep_priv;
-+ return 0;
-+}
-+
-+static void ep_priv_free(struct usb_host_endpoint *ep) {
-+ struct crisv10_ep_priv *ep_priv = ep->hcpriv;
-+ ASSERT(ep_priv);
-+ kfree(ep_priv);
-+ ep->hcpriv = NULL;
-+}
-+
-+/* EPID handling functions, managing EP-list in Etrax through wrappers */
-+/* ------------------------------------------------------------------- */
-+
-+/* Sets up a new EPID for an endpoint or returns existing if found */
-+//static int tc_setup_epid(struct usb_host_endpoint *ep, struct urb *urb,
-+// int mem_flags) {
-+static int tc_setup_epid(struct urb *urb, int mem_flags)
-+{
-+ int epid;
-+ char devnum, endpoint, out_traffic, slow;
-+ int maxlen;
-+ __u32 epid_data;
-+ struct usb_host_endpoint *ep = urb->ep;
-+ struct crisv10_ep_priv *ep_priv = ep->hcpriv;
-+
-+ DBFENTER;
-+
-+ /* Check if a valid epid already is setup for this endpoint */
-+ if(ep_priv != NULL) {
-+ return ep_priv->epid;
-+ }
-+
-+ /* We must find and initiate a new epid for this urb. */
-+ epid = tc_allocate_epid();
-+
-+ if (epid == -1) {
-+ /* Failed to allocate a new epid. */
-+ DBFEXIT;
-+ return epid;
-+ }
-+
-+ /* We now have a new epid to use. Claim it. */
-+ epid_state[epid].inuse = 1;
-+
-+ /* Init private data for new endpoint */
-+ if(ep_priv_create(ep, mem_flags) != 0) {
-+ return -ENOMEM;
-+ }
-+ ep_priv = ep->hcpriv;
-+ ep_priv->epid = epid;
-+
-+ devnum = usb_pipedevice(urb->pipe);
-+ endpoint = usb_pipeendpoint(urb->pipe);
-+ slow = (urb->dev->speed == USB_SPEED_LOW);
-+ maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
-+
-+ if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
-+ /* We want both IN and OUT control traffic to be put on the same
-+ EP/SB list. */
-+ out_traffic = 1;
-+ } else {
-+ out_traffic = usb_pipeout(urb->pipe);
-+ }
-+
-+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-+ epid_data = IO_STATE(R_USB_EPT_DATA_ISO, valid, yes) |
-+ /* FIXME: Change any to the actual port? */
-+ IO_STATE(R_USB_EPT_DATA_ISO, port, any) |
-+ IO_FIELD(R_USB_EPT_DATA_ISO, max_len, maxlen) |
-+ IO_FIELD(R_USB_EPT_DATA_ISO, ep, endpoint) |
-+ IO_FIELD(R_USB_EPT_DATA_ISO, dev, devnum);
-+ etrax_epid_iso_set(epid, epid_data);
-+ } else {
-+ epid_data = IO_STATE(R_USB_EPT_DATA, valid, yes) |
-+ IO_FIELD(R_USB_EPT_DATA, low_speed, slow) |
-+ /* FIXME: Change any to the actual port? */
-+ IO_STATE(R_USB_EPT_DATA, port, any) |
-+ IO_FIELD(R_USB_EPT_DATA, max_len, maxlen) |
-+ IO_FIELD(R_USB_EPT_DATA, ep, endpoint) |
-+ IO_FIELD(R_USB_EPT_DATA, dev, devnum);
-+ etrax_epid_set(epid, epid_data);
-+ }
-+
-+ epid_state[epid].out_traffic = out_traffic;
-+ epid_state[epid].type = usb_pipetype(urb->pipe);
-+
-+ tc_warn("Setting up ep:0x%x epid:%d (addr:%d endp:%d max_len:%d %s %s %s)\n",
-+ (unsigned int)ep, epid, devnum, endpoint, maxlen,
-+ str_type(urb->pipe), out_traffic ? "out" : "in",
-+ slow ? "low" : "full");
-+
-+ /* Enable Isoc eof interrupt if we set up the first Isoc epid */
-+ if(usb_pipeisoc(urb->pipe)) {
-+ isoc_epid_counter++;
-+ if(isoc_epid_counter == 1) {
-+ isoc_warn("Enabled Isoc eof interrupt\n");
-+ *R_USB_IRQ_MASK_SET |= IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set);
-+ }
-+ }
-+
-+ DBFEXIT;
-+ return epid;
-+}
-+
-+static void tc_free_epid(struct usb_host_endpoint *ep) {
-+ unsigned long flags;
-+ struct crisv10_ep_priv *ep_priv = ep->hcpriv;
-+ int epid;
-+ volatile int timeout = 10000;
-+
-+ DBFENTER;
-+
-+ if (ep_priv == NULL) {
-+ tc_warn("Trying to free unused epid on ep:0x%x\n", (unsigned int)ep);
-+ DBFEXIT;
-+ return;
-+ }
-+
-+ epid = ep_priv->epid;
-+
-+ /* Disable Isoc eof interrupt if we free the last Isoc epid */
-+ if(epid_isoc(epid)) {
-+ ASSERT(isoc_epid_counter > 0);
-+ isoc_epid_counter--;
-+ if(isoc_epid_counter == 0) {
-+ *R_USB_IRQ_MASK_SET &= ~IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set);
-+ isoc_warn("Disabled Isoc eof interrupt\n");
-+ }
-+ }
-+
-+ /* Take lock manualy instead of in epid_x_x wrappers,
-+ because we need to be polling here */
-+ spin_lock_irqsave(&etrax_epid_lock, flags);
-+
-+ *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
-+ nop();
-+ while((*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)) &&
-+ (timeout-- > 0));
-+ if(timeout == 0) {
-+ warn("Timeout while waiting for epid:%d to drop hold\n", epid);
-+ }
-+ /* This will, among other things, set the valid field to 0. */
-+ *R_USB_EPT_DATA = 0;
-+ spin_unlock_irqrestore(&etrax_epid_lock, flags);
-+
-+ /* Free resource in software state info list */
-+ epid_state[epid].inuse = 0;
-+
-+ /* Free private endpoint data */
-+ ep_priv_free(ep);
-+
-+ DBFEXIT;
-+}
-+
-+static int tc_allocate_epid(void) {
-+ int i;
-+ DBFENTER;
-+ for (i = 0; i < NBR_OF_EPIDS; i++) {
-+ if (!epid_inuse(i)) {
-+ DBFEXIT;
-+ return i;
-+ }
-+ }
-+
-+ tc_warn("Found no free epids\n");
-+ DBFEXIT;
-+ return -1;
-+}
-+
-+
-+/* Wrappers around the list functions (include/linux/list.h). */
-+/* ---------------------------------------------------------- */
-+static inline int __urb_list_empty(int epid) {
-+ int retval;
-+ retval = list_empty(&urb_list[epid]);
-+ return retval;
-+}
-+
-+/* Returns first urb for this epid, or NULL if list is empty. */
-+static inline struct urb *urb_list_first(int epid) {
-+ unsigned long flags;
-+ struct urb *first_urb = 0;
-+ spin_lock_irqsave(&urb_list_lock, flags);
-+ if (!__urb_list_empty(epid)) {
-+ /* Get the first urb (i.e. head->next). */
-+ urb_entry_t *urb_entry = list_entry((&urb_list[epid])->next, urb_entry_t, list);
-+ first_urb = urb_entry->urb;
-+ }
-+ spin_unlock_irqrestore(&urb_list_lock, flags);
-+ return first_urb;
-+}
-+
-+/* Adds an urb_entry last in the list for this epid. */
-+static inline void urb_list_add(struct urb *urb, int epid, int mem_flags) {
-+ unsigned long flags;
-+ urb_entry_t *urb_entry = (urb_entry_t *)kmalloc(sizeof(urb_entry_t), mem_flags);
-+ ASSERT(urb_entry);
-+
-+ urb_entry->urb = urb;
-+ spin_lock_irqsave(&urb_list_lock, flags);
-+ list_add_tail(&urb_entry->list, &urb_list[epid]);
-+ spin_unlock_irqrestore(&urb_list_lock, flags);
-+}
-+
-+/* Search through the list for an element that contains this urb. (The list
-+ is expected to be short and the one we are about to delete will often be
-+ the first in the list.)
-+ Should be protected by spin_locks in calling function */
-+static inline urb_entry_t *__urb_list_entry(struct urb *urb, int epid) {
-+ struct list_head *entry;
-+ struct list_head *tmp;
-+ urb_entry_t *urb_entry;
-+
-+ list_for_each_safe(entry, tmp, &urb_list[epid]) {
-+ urb_entry = list_entry(entry, urb_entry_t, list);
-+ ASSERT(urb_entry);
-+ ASSERT(urb_entry->urb);
-+
-+ if (urb_entry->urb == urb) {
-+ return urb_entry;
-+ }
-+ }
-+ return 0;
-+}
-+
-+/* Same function as above but for global use. Protects list by spinlock */
-+static inline urb_entry_t *urb_list_entry(struct urb *urb, int epid) {
-+ unsigned long flags;
-+ urb_entry_t *urb_entry;
-+ spin_lock_irqsave(&urb_list_lock, flags);
-+ urb_entry = __urb_list_entry(urb, epid);
-+ spin_unlock_irqrestore(&urb_list_lock, flags);
-+ return (urb_entry);
-+}
-+
-+/* Delete an urb from the list. */
-+static inline void urb_list_del(struct urb *urb, int epid) {
-+ unsigned long flags;
-+ urb_entry_t *urb_entry;
-+
-+ /* Delete entry and free. */
-+ spin_lock_irqsave(&urb_list_lock, flags);
-+ urb_entry = __urb_list_entry(urb, epid);
-+ ASSERT(urb_entry);
-+
-+ list_del(&urb_entry->list);
-+ spin_unlock_irqrestore(&urb_list_lock, flags);
-+ kfree(urb_entry);
-+}
-+
-+/* Move an urb to the end of the list. */
-+static inline void urb_list_move_last(struct urb *urb, int epid) {
-+ unsigned long flags;
-+ urb_entry_t *urb_entry;
-+
-+ spin_lock_irqsave(&urb_list_lock, flags);
-+ urb_entry = __urb_list_entry(urb, epid);
-+ ASSERT(urb_entry);
-+
-+ list_del(&urb_entry->list);
-+ list_add_tail(&urb_entry->list, &urb_list[epid]);
-+ spin_unlock_irqrestore(&urb_list_lock, flags);
-+}
-+
-+/* Get the next urb in the list. */
-+static inline struct urb *urb_list_next(struct urb *urb, int epid) {
-+ unsigned long flags;
-+ urb_entry_t *urb_entry;
-+
-+ spin_lock_irqsave(&urb_list_lock, flags);
-+ urb_entry = __urb_list_entry(urb, epid);
-+ ASSERT(urb_entry);
-+
-+ if (urb_entry->list.next != &urb_list[epid]) {
-+ struct list_head *elem = urb_entry->list.next;
-+ urb_entry = list_entry(elem, urb_entry_t, list);
-+ spin_unlock_irqrestore(&urb_list_lock, flags);
-+ return urb_entry->urb;
-+ } else {
-+ spin_unlock_irqrestore(&urb_list_lock, flags);
-+ return NULL;
-+ }
-+}
-+
-+struct USB_EP_Desc* create_ep(int epid, struct USB_SB_Desc* sb_desc,
-+ int mem_flags) {
-+ struct USB_EP_Desc *ep_desc;
-+ ep_desc = (struct USB_EP_Desc *) kmem_cache_alloc(usb_desc_cache, mem_flags);
-+ if(ep_desc == NULL)
-+ return NULL;
-+ memset(ep_desc, 0, sizeof(struct USB_EP_Desc));
-+
-+ ep_desc->hw_len = 0;
-+ ep_desc->command = (IO_FIELD(USB_EP_command, epid, epid) |
-+ IO_STATE(USB_EP_command, enable, yes));
-+ if(sb_desc == NULL) {
-+ ep_desc->sub = 0;
-+ } else {
-+ ep_desc->sub = virt_to_phys(sb_desc);
-+ }
-+ return ep_desc;
-+}
-+
-+#define TT_ZOUT 0
-+#define TT_IN 1
-+#define TT_OUT 2
-+#define TT_SETUP 3
-+
-+#define CMD_EOL IO_STATE(USB_SB_command, eol, yes)
-+#define CMD_INTR IO_STATE(USB_SB_command, intr, yes)
-+#define CMD_FULL IO_STATE(USB_SB_command, full, yes)
-+
-+/* Allocation and setup of a generic SB. Used to create SETUP, OUT and ZOUT
-+ SBs. Also used by create_sb_in() to avoid same allocation procedure at two
-+ places */
-+struct USB_SB_Desc* create_sb(struct USB_SB_Desc* sb_prev, int tt, void* data,
-+ int datalen, int mem_flags) {
-+ struct USB_SB_Desc *sb_desc;
-+ sb_desc = (struct USB_SB_Desc*)kmem_cache_alloc(usb_desc_cache, mem_flags);
-+ if(sb_desc == NULL)
-+ return NULL;
-+ memset(sb_desc, 0, sizeof(struct USB_SB_Desc));
-+
-+ sb_desc->command = IO_FIELD(USB_SB_command, tt, tt) |
-+ IO_STATE(USB_SB_command, eot, yes);
-+
-+ sb_desc->sw_len = datalen;
-+ if(data != NULL) {
-+ sb_desc->buf = virt_to_phys(data);
-+ } else {
-+ sb_desc->buf = 0;
-+ }
-+ if(sb_prev != NULL) {
-+ sb_prev->next = virt_to_phys(sb_desc);
-+ }
-+ return sb_desc;
-+}
-+
-+/* Creates a copy of an existing SB by allocation space for it and copy
-+ settings */
-+struct USB_SB_Desc* create_sb_copy(struct USB_SB_Desc* sb_orig, int mem_flags) {
-+ struct USB_SB_Desc *sb_desc;
-+ sb_desc = (struct USB_SB_Desc*)kmem_cache_alloc(usb_desc_cache, mem_flags);
-+ if(sb_desc == NULL)
-+ return NULL;
-+
-+ memcpy(sb_desc, sb_orig, sizeof(struct USB_SB_Desc));
-+ return sb_desc;
-+}
-+
-+/* A specific create_sb function for creation of in SBs. This is due to
-+ that datalen in In SBs shows how many packets we are expecting. It also
-+ sets up the rem field to show if how many bytes we expect in last packet
-+ if it's not a full one */
-+struct USB_SB_Desc* create_sb_in(struct USB_SB_Desc* sb_prev, int datalen,
-+ int maxlen, int mem_flags) {
-+ struct USB_SB_Desc *sb_desc;
-+ sb_desc = create_sb(sb_prev, TT_IN, NULL,
-+ datalen ? (datalen - 1) / maxlen + 1 : 0, mem_flags);
-+ if(sb_desc == NULL)
-+ return NULL;
-+ sb_desc->command |= IO_FIELD(USB_SB_command, rem, datalen % maxlen);
-+ return sb_desc;
-+}
-+
-+void set_sb_cmds(struct USB_SB_Desc *sb_desc, __u16 flags) {
-+ sb_desc->command |= flags;
-+}
-+
-+int create_sb_for_urb(struct urb *urb, int mem_flags) {
-+ int is_out = !usb_pipein(urb->pipe);
-+ int type = usb_pipetype(urb->pipe);
-+ int maxlen = usb_maxpacket(urb->dev, urb->pipe, is_out);
-+ int buf_len = urb->transfer_buffer_length;
-+ void *buf = buf_len > 0 ? urb->transfer_buffer : NULL;
-+ struct USB_SB_Desc *sb_desc = NULL;
-+
-+ struct crisv10_urb_priv *urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
-+ ASSERT(urb_priv != NULL);
-+
-+ switch(type) {
-+ case PIPE_CONTROL:
-+ /* Setup stage */
-+ sb_desc = create_sb(NULL, TT_SETUP, urb->setup_packet, 8, mem_flags);
-+ if(sb_desc == NULL)
-+ return -ENOMEM;
-+ set_sb_cmds(sb_desc, CMD_FULL);
-+
-+ /* Attach first SB to URB */
-+ urb_priv->first_sb = sb_desc;
-+
-+ if (is_out) { /* Out Control URB */
-+ /* If this Control OUT transfer has an optional data stage we add
-+ an OUT token before the mandatory IN (status) token */
-+ if ((buf_len > 0) && buf) {
-+ sb_desc = create_sb(sb_desc, TT_OUT, buf, buf_len, mem_flags);
-+ if(sb_desc == NULL)
-+ return -ENOMEM;
-+ set_sb_cmds(sb_desc, CMD_FULL);
-+ }
-+
-+ /* Status stage */
-+ /* The data length has to be exactly 1. This is due to a requirement
-+ of the USB specification that a host must be prepared to receive
-+ data in the status phase */
-+ sb_desc = create_sb(sb_desc, TT_IN, NULL, 1, mem_flags);
-+ if(sb_desc == NULL)
-+ return -ENOMEM;
-+ } else { /* In control URB */
-+ /* Data stage */
-+ sb_desc = create_sb_in(sb_desc, buf_len, maxlen, mem_flags);
-+ if(sb_desc == NULL)
-+ return -ENOMEM;
-+
-+ /* Status stage */
-+ /* Read comment at zout_buffer declaration for an explanation to this. */
-+ sb_desc = create_sb(sb_desc, TT_ZOUT, &zout_buffer[0], 1, mem_flags);
-+ if(sb_desc == NULL)
-+ return -ENOMEM;
-+ /* Set descriptor interrupt flag for in URBs so we can finish URB after
-+ zout-packet has been sent */
-+ set_sb_cmds(sb_desc, CMD_INTR | CMD_FULL);
-+ }
-+ /* Set end-of-list flag in last SB */
-+ set_sb_cmds(sb_desc, CMD_EOL);
-+ /* Attach last SB to URB */
-+ urb_priv->last_sb = sb_desc;
-+ break;
-+
-+ case PIPE_BULK:
-+ if (is_out) { /* Out Bulk URB */
-+ sb_desc = create_sb(NULL, TT_OUT, buf, buf_len, mem_flags);
-+ if(sb_desc == NULL)
-+ return -ENOMEM;
-+ /* The full field is set to yes, even if we don't actually check that
-+ this is a full-length transfer (i.e., that transfer_buffer_length %
-+ maxlen = 0).
-+ Setting full prevents the USB controller from sending an empty packet
-+ in that case. However, if URB_ZERO_PACKET was set we want that. */
-+ if (!(urb->transfer_flags & URB_ZERO_PACKET)) {
-+ set_sb_cmds(sb_desc, CMD_FULL);
-+ }
-+ } else { /* In Bulk URB */
-+ sb_desc = create_sb_in(NULL, buf_len, maxlen, mem_flags);
-+ if(sb_desc == NULL)
-+ return -ENOMEM;
-+ }
-+ /* Set end-of-list flag for last SB */
-+ set_sb_cmds(sb_desc, CMD_EOL);
-+
-+ /* Attach SB to URB */
-+ urb_priv->first_sb = sb_desc;
-+ urb_priv->last_sb = sb_desc;
-+ break;
-+
-+ case PIPE_INTERRUPT:
-+ if(is_out) { /* Out Intr URB */
-+ sb_desc = create_sb(NULL, TT_OUT, buf, buf_len, mem_flags);
-+ if(sb_desc == NULL)
-+ return -ENOMEM;
-+
-+ /* The full field is set to yes, even if we don't actually check that
-+ this is a full-length transfer (i.e., that transfer_buffer_length %
-+ maxlen = 0).
-+ Setting full prevents the USB controller from sending an empty packet
-+ in that case. However, if URB_ZERO_PACKET was set we want that. */
-+ if (!(urb->transfer_flags & URB_ZERO_PACKET)) {
-+ set_sb_cmds(sb_desc, CMD_FULL);
-+ }
-+ /* Only generate TX interrupt if it's a Out URB*/
-+ set_sb_cmds(sb_desc, CMD_INTR);
-+
-+ } else { /* In Intr URB */
-+ sb_desc = create_sb_in(NULL, buf_len, maxlen, mem_flags);
-+ if(sb_desc == NULL)
-+ return -ENOMEM;
-+ }
-+ /* Set end-of-list flag for last SB */
-+ set_sb_cmds(sb_desc, CMD_EOL);
-+
-+ /* Attach SB to URB */
-+ urb_priv->first_sb = sb_desc;
-+ urb_priv->last_sb = sb_desc;
-+
-+ break;
-+ case PIPE_ISOCHRONOUS:
-+ if(is_out) { /* Out Isoc URB */
-+ int i;
-+ if(urb->number_of_packets == 0) {
-+ tc_err("Can't create SBs for Isoc URB with zero packets\n");
-+ return -EPIPE;
-+ }
-+ /* Create one SB descriptor for each packet and link them together. */
-+ for(i = 0; i < urb->number_of_packets; i++) {
-+ if (urb->iso_frame_desc[i].length > 0) {
-+
-+ sb_desc = create_sb(sb_desc, TT_OUT, urb->transfer_buffer +
-+ urb->iso_frame_desc[i].offset,
-+ urb->iso_frame_desc[i].length, mem_flags);
-+ if(sb_desc == NULL)
-+ return -ENOMEM;
-+
-+ /* Check if it's a full length packet */
-+ if (urb->iso_frame_desc[i].length ==
-+ usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))) {
-+ set_sb_cmds(sb_desc, CMD_FULL);
-+ }
-+
-+ } else { /* zero length packet */
-+ sb_desc = create_sb(sb_desc, TT_ZOUT, &zout_buffer[0], 1, mem_flags);
-+ if(sb_desc == NULL)
-+ return -ENOMEM;
-+ set_sb_cmds(sb_desc, CMD_FULL);
-+ }
-+ /* Attach first SB descriptor to URB */
-+ if (i == 0) {
-+ urb_priv->first_sb = sb_desc;
-+ }
-+ }
-+ /* Set interrupt and end-of-list flags in last SB */
-+ set_sb_cmds(sb_desc, CMD_INTR | CMD_EOL);
-+ /* Attach last SB descriptor to URB */
-+ urb_priv->last_sb = sb_desc;
-+ tc_dbg("Created %d out SBs for Isoc URB:0x%x\n",
-+ urb->number_of_packets, (unsigned int)urb);
-+ } else { /* In Isoc URB */
-+ /* Actual number of packets is not relevant for periodic in traffic as
-+ long as it is more than zero. Set to 1 always. */
-+ sb_desc = create_sb(sb_desc, TT_IN, NULL, 1, mem_flags);
-+ if(sb_desc == NULL)
-+ return -ENOMEM;
-+ /* Set end-of-list flags for SB */
-+ set_sb_cmds(sb_desc, CMD_EOL);
-+
-+ /* Attach SB to URB */
-+ urb_priv->first_sb = sb_desc;
-+ urb_priv->last_sb = sb_desc;
-+ }
-+ break;
-+ default:
-+ tc_err("Unknown pipe-type\n");
-+ return -EPIPE;
-+ break;
-+ }
-+ return 0;
-+}
-+
-+int init_intr_urb(struct urb *urb, int mem_flags) {
-+ struct crisv10_urb_priv *urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
-+ struct USB_EP_Desc* ep_desc;
-+ int interval;
-+ int i;
-+ int ep_count;
-+
-+ ASSERT(urb_priv != NULL);
-+ ASSERT(usb_pipeint(urb->pipe));
-+ /* We can't support interval longer than amount of eof descriptors in
-+ TxIntrEPList */
-+ if(urb->interval > MAX_INTR_INTERVAL) {
-+ tc_err("Interrupt interval %dms too big (max: %dms)\n", urb->interval,
-+ MAX_INTR_INTERVAL);
-+ return -EINVAL;
-+ }
-+
-+ /* We assume that the SB descriptors already have been setup */
-+ ASSERT(urb_priv->first_sb != NULL);
-+
-+ /* Round of the interval to 2^n, it is obvious that this code favours
-+ smaller numbers, but that is actually a good thing */
-+ /* FIXME: The "rounding error" for larger intervals will be quite
-+ large. For in traffic this shouldn't be a problem since it will only
-+ mean that we "poll" more often. */
-+ interval = urb->interval;
-+ for (i = 0; interval; i++) {
-+ interval = interval >> 1;
-+ }
-+ urb_priv->interval = 1 << (i - 1);
-+
-+ /* We can only have max interval for Out Interrupt due to that we can only
-+ handle one linked in EP for a certain epid in the Intr descr array at the
-+ time. The USB Controller in the Etrax 100LX continues to process Intr EPs
-+ so we have no way of knowing which one that caused the actual transfer if
-+ we have several linked in. */
-+ if(usb_pipeout(urb->pipe)) {
-+ urb_priv->interval = MAX_INTR_INTERVAL;
-+ }
-+
-+ /* Calculate amount of EPs needed */
-+ ep_count = MAX_INTR_INTERVAL / urb_priv->interval;
-+
-+ for(i = 0; i < ep_count; i++) {
-+ ep_desc = create_ep(urb_priv->epid, urb_priv->first_sb, mem_flags);
-+ if(ep_desc == NULL) {
-+ /* Free any descriptors that we may have allocated before failure */
-+ while(i > 0) {
-+ i--;
-+ kfree(urb_priv->intr_ep_pool[i]);
-+ }
-+ return -ENOMEM;
-+ }
-+ urb_priv->intr_ep_pool[i] = ep_desc;
-+ }
-+ urb_priv->intr_ep_pool_length = ep_count;
-+ return 0;
-+}
-+
-+/* DMA RX/TX functions */
-+/* ----------------------- */
-+
-+static void tc_dma_init_rx_list(void) {
-+ int i;
-+
-+ /* Setup descriptor list except last one */
-+ for (i = 0; i < (NBR_OF_RX_DESC - 1); i++) {
-+ RxDescList[i].sw_len = RX_DESC_BUF_SIZE;
-+ RxDescList[i].command = 0;
-+ RxDescList[i].next = virt_to_phys(&RxDescList[i + 1]);
-+ RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE));
-+ RxDescList[i].hw_len = 0;
-+ RxDescList[i].status = 0;
-+
-+ /* DMA IN cache bug. (struct etrax_dma_descr has the same layout as
-+ USB_IN_Desc for the relevant fields.) */
-+ prepare_rx_descriptor((struct etrax_dma_descr*)&RxDescList[i]);
-+
-+ }
-+ /* Special handling of last descriptor */
-+ RxDescList[i].sw_len = RX_DESC_BUF_SIZE;
-+ RxDescList[i].command = IO_STATE(USB_IN_command, eol, yes);
-+ RxDescList[i].next = virt_to_phys(&RxDescList[0]);
-+ RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE));
-+ RxDescList[i].hw_len = 0;
-+ RxDescList[i].status = 0;
-+
-+ /* Setup list pointers that show progress in list */
-+ myNextRxDesc = &RxDescList[0];
-+ myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1];
-+
-+ flush_etrax_cache();
-+ /* Point DMA to first descriptor in list and start it */
-+ *R_DMA_CH9_FIRST = virt_to_phys(myNextRxDesc);
-+ *R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, start);
-+}
-+
-+
-+static void tc_dma_init_tx_bulk_list(void) {
-+ int i;
-+ volatile struct USB_EP_Desc *epDescr;
-+
-+ for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
-+ epDescr = &(TxBulkEPList[i]);
-+ CHECK_ALIGN(epDescr);
-+ epDescr->hw_len = 0;
-+ epDescr->command = IO_FIELD(USB_EP_command, epid, i);
-+ epDescr->sub = 0;
-+ epDescr->next = virt_to_phys(&TxBulkEPList[i + 1]);
-+
-+ /* Initiate two EPs, disabled and with the eol flag set. No need for any
-+ preserved epid. */
-+
-+ /* The first one has the intr flag set so we get an interrupt when the DMA
-+ channel is about to become disabled. */
-+ CHECK_ALIGN(&TxBulkDummyEPList[i][0]);
-+ TxBulkDummyEPList[i][0].hw_len = 0;
-+ TxBulkDummyEPList[i][0].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) |
-+ IO_STATE(USB_EP_command, eol, yes) |
-+ IO_STATE(USB_EP_command, intr, yes));
-+ TxBulkDummyEPList[i][0].sub = 0;
-+ TxBulkDummyEPList[i][0].next = virt_to_phys(&TxBulkDummyEPList[i][1]);
-+
-+ /* The second one. */
-+ CHECK_ALIGN(&TxBulkDummyEPList[i][1]);
-+ TxBulkDummyEPList[i][1].hw_len = 0;
-+ TxBulkDummyEPList[i][1].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) |
-+ IO_STATE(USB_EP_command, eol, yes));
-+ TxBulkDummyEPList[i][1].sub = 0;
-+ /* The last dummy's next pointer is the same as the current EP's next pointer. */
-+ TxBulkDummyEPList[i][1].next = virt_to_phys(&TxBulkEPList[i + 1]);
-+ }
-+
-+ /* Special handling of last descr in list, make list circular */
-+ epDescr = &TxBulkEPList[i];
-+ CHECK_ALIGN(epDescr);
-+ epDescr->hw_len = 0;
-+ epDescr->command = IO_STATE(USB_EP_command, eol, yes) |
-+ IO_FIELD(USB_EP_command, epid, i);
-+ epDescr->sub = 0;
-+ epDescr->next = virt_to_phys(&TxBulkEPList[0]);
-+
-+ /* Init DMA sub-channel pointers to last item in each list */
-+ *R_DMA_CH8_SUB0_EP = virt_to_phys(&TxBulkEPList[i]);
-+ /* No point in starting the bulk channel yet.
-+ *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); */
-+}
-+
-+static void tc_dma_init_tx_ctrl_list(void) {
-+ int i;
-+ volatile struct USB_EP_Desc *epDescr;
-+
-+ for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
-+ epDescr = &(TxCtrlEPList[i]);
-+ CHECK_ALIGN(epDescr);
-+ epDescr->hw_len = 0;
-+ epDescr->command = IO_FIELD(USB_EP_command, epid, i);
-+ epDescr->sub = 0;
-+ epDescr->next = virt_to_phys(&TxCtrlEPList[i + 1]);
-+ }
-+ /* Special handling of last descr in list, make list circular */
-+ epDescr = &TxCtrlEPList[i];
-+ CHECK_ALIGN(epDescr);
-+ epDescr->hw_len = 0;
-+ epDescr->command = IO_STATE(USB_EP_command, eol, yes) |
-+ IO_FIELD(USB_EP_command, epid, i);
-+ epDescr->sub = 0;
-+ epDescr->next = virt_to_phys(&TxCtrlEPList[0]);
-+
-+ /* Init DMA sub-channel pointers to last item in each list */
-+ *R_DMA_CH8_SUB1_EP = virt_to_phys(&TxCtrlEPList[i]);
-+ /* No point in starting the ctrl channel yet.
-+ *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); */
-+}
-+
-+
-+static void tc_dma_init_tx_intr_list(void) {
-+ int i;
-+
-+ TxIntrSB_zout.sw_len = 1;
-+ TxIntrSB_zout.next = 0;
-+ TxIntrSB_zout.buf = virt_to_phys(&zout_buffer[0]);
-+ TxIntrSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) |
-+ IO_STATE(USB_SB_command, tt, zout) |
-+ IO_STATE(USB_SB_command, full, yes) |
-+ IO_STATE(USB_SB_command, eot, yes) |
-+ IO_STATE(USB_SB_command, eol, yes));
-+
-+ for (i = 0; i < (MAX_INTR_INTERVAL - 1); i++) {
-+ CHECK_ALIGN(&TxIntrEPList[i]);
-+ TxIntrEPList[i].hw_len = 0;
-+ TxIntrEPList[i].command =
-+ (IO_STATE(USB_EP_command, eof, yes) |
-+ IO_STATE(USB_EP_command, enable, yes) |
-+ IO_FIELD(USB_EP_command, epid, INVALID_EPID));
-+ TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout);
-+ TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[i + 1]);
-+ }
-+
-+ /* Special handling of last descr in list, make list circular */
-+ CHECK_ALIGN(&TxIntrEPList[i]);
-+ TxIntrEPList[i].hw_len = 0;
-+ TxIntrEPList[i].command =
-+ (IO_STATE(USB_EP_command, eof, yes) |
-+ IO_STATE(USB_EP_command, eol, yes) |
-+ IO_STATE(USB_EP_command, enable, yes) |
-+ IO_FIELD(USB_EP_command, epid, INVALID_EPID));
-+ TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout);
-+ TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[0]);
-+
-+ intr_dbg("Initiated Intr EP descriptor list\n");
-+
-+
-+ /* Connect DMA 8 sub-channel 2 to first in list */
-+ *R_DMA_CH8_SUB2_EP = virt_to_phys(&TxIntrEPList[0]);
-+}
-+
-+static void tc_dma_init_tx_isoc_list(void) {
-+ int i;
-+
-+ DBFENTER;
-+
-+ /* Read comment at zout_buffer declaration for an explanation to this. */
-+ TxIsocSB_zout.sw_len = 1;
-+ TxIsocSB_zout.next = 0;
-+ TxIsocSB_zout.buf = virt_to_phys(&zout_buffer[0]);
-+ TxIsocSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) |
-+ IO_STATE(USB_SB_command, tt, zout) |
-+ IO_STATE(USB_SB_command, full, yes) |
-+ IO_STATE(USB_SB_command, eot, yes) |
-+ IO_STATE(USB_SB_command, eol, yes));
-+
-+ /* The last isochronous EP descriptor is a dummy. */
-+ for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
-+ CHECK_ALIGN(&TxIsocEPList[i]);
-+ TxIsocEPList[i].hw_len = 0;
-+ TxIsocEPList[i].command = IO_FIELD(USB_EP_command, epid, i);
-+ TxIsocEPList[i].sub = 0;
-+ TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[i + 1]);
-+ }
-+
-+ CHECK_ALIGN(&TxIsocEPList[i]);
-+ TxIsocEPList[i].hw_len = 0;
-+
-+ /* Must enable the last EP descr to get eof interrupt. */
-+ TxIsocEPList[i].command = (IO_STATE(USB_EP_command, enable, yes) |
-+ IO_STATE(USB_EP_command, eof, yes) |
-+ IO_STATE(USB_EP_command, eol, yes) |
-+ IO_FIELD(USB_EP_command, epid, INVALID_EPID));
-+ TxIsocEPList[i].sub = virt_to_phys(&TxIsocSB_zout);
-+ TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[0]);
-+
-+ *R_DMA_CH8_SUB3_EP = virt_to_phys(&TxIsocEPList[0]);
-+ *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start);
-+}
-+
-+static int tc_dma_init(struct usb_hcd *hcd) {
-+ tc_dma_init_rx_list();
-+ tc_dma_init_tx_bulk_list();
-+ tc_dma_init_tx_ctrl_list();
-+ tc_dma_init_tx_intr_list();
-+ tc_dma_init_tx_isoc_list();
-+
-+ if (cris_request_dma(USB_TX_DMA_NBR,
-+ "ETRAX 100LX built-in USB (Tx)",
-+ DMA_VERBOSE_ON_ERROR,
-+ dma_usb)) {
-+ err("Could not allocate DMA ch 8 for USB");
-+ return -EBUSY;
-+ }
-+
-+ if (cris_request_dma(USB_RX_DMA_NBR,
-+ "ETRAX 100LX built-in USB (Rx)",
-+ DMA_VERBOSE_ON_ERROR,
-+ dma_usb)) {
-+ err("Could not allocate DMA ch 9 for USB");
-+ return -EBUSY;
-+ }
-+
-+ *R_IRQ_MASK2_SET =
-+ /* Note that these interrupts are not used. */
-+ IO_STATE(R_IRQ_MASK2_SET, dma8_sub0_descr, set) |
-+ /* Sub channel 1 (ctrl) descr. interrupts are used. */
-+ IO_STATE(R_IRQ_MASK2_SET, dma8_sub1_descr, set) |
-+ IO_STATE(R_IRQ_MASK2_SET, dma8_sub2_descr, set) |
-+ /* Sub channel 3 (isoc) descr. interrupts are used. */
-+ IO_STATE(R_IRQ_MASK2_SET, dma8_sub3_descr, set);
-+
-+ /* Note that the dma9_descr interrupt is not used. */
-+ *R_IRQ_MASK2_SET =
-+ IO_STATE(R_IRQ_MASK2_SET, dma9_eop, set) |
-+ IO_STATE(R_IRQ_MASK2_SET, dma9_descr, set);
-+
-+ if (request_irq(ETRAX_USB_RX_IRQ, tc_dma_rx_interrupt, 0,
-+ "ETRAX 100LX built-in USB (Rx)", hcd)) {
-+ err("Could not allocate IRQ %d for USB", ETRAX_USB_RX_IRQ);
-+ return -EBUSY;
-+ }
-+
-+ if (request_irq(ETRAX_USB_TX_IRQ, tc_dma_tx_interrupt, 0,
-+ "ETRAX 100LX built-in USB (Tx)", hcd)) {
-+ err("Could not allocate IRQ %d for USB", ETRAX_USB_TX_IRQ);
-+ return -EBUSY;
-+ }
-+
-+ return 0;
-+}
-+
-+static void tc_dma_destroy(void) {
-+ free_irq(ETRAX_USB_RX_IRQ, NULL);
-+ free_irq(ETRAX_USB_TX_IRQ, NULL);
-+
-+ cris_free_dma(USB_TX_DMA_NBR, "ETRAX 100LX built-in USB (Tx)");
-+ cris_free_dma(USB_RX_DMA_NBR, "ETRAX 100LX built-in USB (Rx)");
-+
-+}
-+
-+static void tc_dma_link_intr_urb(struct urb *urb);
-+
-+/* Handle processing of Bulk, Ctrl and Intr queues */
-+static void tc_dma_process_queue(int epid) {
-+ struct urb *urb;
-+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
-+ unsigned long flags;
-+ char toggle;
-+
-+ if(epid_state[epid].disabled) {
-+ /* Don't process any URBs on a disabled endpoint */
-+ return;
-+ }
-+
-+ /* Do not disturb us while fiddling with EPs and epids */
-+ local_irq_save(flags);
-+
-+ /* For bulk, Ctrl and Intr can we only have one URB active at a time for
-+ a specific EP. */
-+ if(activeUrbList[epid] != NULL) {
-+ /* An URB is already active on EP, skip checking queue */
-+ local_irq_restore(flags);
-+ return;
-+ }
-+
-+ urb = urb_list_first(epid);
-+ if(urb == NULL) {
-+ /* No URB waiting in EP queue. Nothing do to */
-+ local_irq_restore(flags);
-+ return;
-+ }
-+
-+ urb_priv = urb->hcpriv;
-+ ASSERT(urb_priv != NULL);
-+ ASSERT(urb_priv->urb_state == NOT_STARTED);
-+ ASSERT(!usb_pipeisoc(urb->pipe));
-+
-+ /* Remove this URB from the queue and move it to active */
-+ activeUrbList[epid] = urb;
-+ urb_list_del(urb, epid);
-+
-+ urb_priv->urb_state = STARTED;
-+
-+ /* Reset error counters (regardless of which direction this traffic is). */
-+ etrax_epid_clear_error(epid);
-+
-+ /* Special handling of Intr EP lists */
-+ if(usb_pipeint(urb->pipe)) {
-+ tc_dma_link_intr_urb(urb);
-+ local_irq_restore(flags);
-+ return;
-+ }
-+
-+ /* Software must preset the toggle bits for Bulk and Ctrl */
-+ if(usb_pipecontrol(urb->pipe)) {
-+ /* Toggle bits are initialized only during setup transaction in a
-+ CTRL transfer */
-+ etrax_epid_set_toggle(epid, 0, 0);
-+ etrax_epid_set_toggle(epid, 1, 0);
-+ } else {
-+ toggle = usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
-+ usb_pipeout(urb->pipe));
-+ etrax_epid_set_toggle(epid, usb_pipeout(urb->pipe), toggle);
-+ }
-+
-+ tc_dbg("Added SBs from (URB:0x%x %s %s) to epid %d: %s\n",
-+ (unsigned int)urb, str_dir(urb->pipe), str_type(urb->pipe), epid,
-+ sblist_to_str(urb_priv->first_sb));
-+
-+ /* We start the DMA sub channel without checking if it's running or not,
-+ because:
-+ 1) If it's already running, issuing the start command is a nop.
-+ 2) We avoid a test-and-set race condition. */
-+ switch(usb_pipetype(urb->pipe)) {
-+ case PIPE_BULK:
-+ /* Assert that the EP descriptor is disabled. */
-+ ASSERT(!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)));
-+
-+ /* Set up and enable the EP descriptor. */
-+ TxBulkEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
-+ TxBulkEPList[epid].hw_len = 0;
-+ TxBulkEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
-+
-+ /* Check if the dummy list is already with us (if several urbs were queued). */
-+ if (usb_pipein(urb->pipe) && (TxBulkEPList[epid].next != virt_to_phys(&TxBulkDummyEPList[epid][0]))) {
-+ tc_dbg("Inviting dummy list to the party for urb 0x%lx, epid %d",
-+ (unsigned long)urb, epid);
-+
-+ /* We don't need to check if the DMA is at this EP or not before changing the
-+ next pointer, since we will do it in one 32-bit write (EP descriptors are
-+ 32-bit aligned). */
-+ TxBulkEPList[epid].next = virt_to_phys(&TxBulkDummyEPList[epid][0]);
-+ }
-+
-+ restart_dma8_sub0();
-+
-+ /* Update/restart the bulk start timer since we just started the channel.*/
-+ mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL);
-+ /* Update/restart the bulk eot timer since we just inserted traffic. */
-+ mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
-+ break;
-+ case PIPE_CONTROL:
-+ /* Assert that the EP descriptor is disabled. */
-+ ASSERT(!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)));
-+
-+ /* Set up and enable the EP descriptor. */
-+ TxCtrlEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
-+ TxCtrlEPList[epid].hw_len = 0;
-+ TxCtrlEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
-+
-+ *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB1_CMD, cmd, start);
-+ break;
-+ }
-+ local_irq_restore(flags);
-+}
-+
-+static void tc_dma_link_intr_urb(struct urb *urb) {
-+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
-+ volatile struct USB_EP_Desc *tmp_ep;
-+ struct USB_EP_Desc *ep_desc;
-+ int i = 0, epid;
-+ int pool_idx = 0;
-+
-+ ASSERT(urb_priv != NULL);
-+ epid = urb_priv->epid;
-+ ASSERT(urb_priv->interval > 0);
-+ ASSERT(urb_priv->intr_ep_pool_length > 0);
-+
-+ tmp_ep = &TxIntrEPList[0];
-+
-+ /* Only insert one EP descriptor in list for Out Intr URBs.
-+ We can only handle Out Intr with interval of 128ms because
-+ it's not possible to insert several Out Intr EPs because they
-+ are not consumed by the DMA. */
-+ if(usb_pipeout(urb->pipe)) {
-+ ep_desc = urb_priv->intr_ep_pool[0];
-+ ASSERT(ep_desc);
-+ ep_desc->next = tmp_ep->next;
-+ tmp_ep->next = virt_to_phys(ep_desc);
-+ i++;
-+ } else {
-+ /* Loop through Intr EP descriptor list and insert EP for URB at
-+ specified interval */
-+ do {
-+ /* Each EP descriptor with eof flag sat signals a new frame */
-+ if (tmp_ep->command & IO_MASK(USB_EP_command, eof)) {
-+ /* Insert a EP from URBs EP pool at correct interval */
-+ if ((i % urb_priv->interval) == 0) {
-+ ep_desc = urb_priv->intr_ep_pool[pool_idx];
-+ ASSERT(ep_desc);
-+ ep_desc->next = tmp_ep->next;
-+ tmp_ep->next = virt_to_phys(ep_desc);
-+ pool_idx++;
-+ ASSERT(pool_idx <= urb_priv->intr_ep_pool_length);
-+ }
-+ i++;
-+ }
-+ tmp_ep = (struct USB_EP_Desc *)phys_to_virt(tmp_ep->next);
-+ } while(tmp_ep != &TxIntrEPList[0]);
-+ }
-+
-+ intr_dbg("Added SBs to intr epid %d: %s interval:%d (%d EP)\n", epid,
-+ sblist_to_str(urb_priv->first_sb), urb_priv->interval, pool_idx);
-+
-+ /* We start the DMA sub channel without checking if it's running or not,
-+ because:
-+ 1) If it's already running, issuing the start command is a nop.
-+ 2) We avoid a test-and-set race condition. */
-+ *R_DMA_CH8_SUB2_CMD = IO_STATE(R_DMA_CH8_SUB2_CMD, cmd, start);
-+}
-+
-+ /* hinko ignore usb_pipeisoc */
-+#if 0
-+static void tc_dma_process_isoc_urb(struct urb *urb) {
-+ unsigned long flags;
-+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
-+ int epid;
-+
-+ /* Do not disturb us while fiddling with EPs and epids */
-+ local_irq_save(flags);
-+
-+ ASSERT(urb_priv);
-+ ASSERT(urb_priv->first_sb);
-+ epid = urb_priv->epid;
-+
-+ if(activeUrbList[epid] == NULL) {
-+ /* EP is idle, so make this URB active */
-+ activeUrbList[epid] = urb;
-+ urb_list_del(urb, epid);
-+ ASSERT(TxIsocEPList[epid].sub == 0);
-+ ASSERT(!(TxIsocEPList[epid].command &
-+ IO_STATE(USB_EP_command, enable, yes)));
-+
-+ /* Differentiate between In and Out Isoc. Because In SBs are not consumed*/
-+ if(usb_pipein(urb->pipe)) {
-+ /* Each EP for In Isoc will have only one SB descriptor, setup when
-+ submitting the first active urb. We do it here by copying from URBs
-+ pre-allocated SB. */
-+ memcpy((void *)&(TxIsocSBList[epid]), urb_priv->first_sb,
-+ sizeof(TxIsocSBList[epid]));
-+ TxIsocEPList[epid].hw_len = 0;
-+ TxIsocEPList[epid].sub = virt_to_phys(&(TxIsocSBList[epid]));
-+ } else {
-+ /* For Out Isoc we attach the pre-allocated list of SBs for the URB */
-+ TxIsocEPList[epid].hw_len = 0;
-+ TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
-+
-+ isoc_dbg("Attached first URB:0x%x[%d] to epid:%d first_sb:0x%x"
-+ " last_sb::0x%x\n",
-+ (unsigned int)urb, urb_priv->urb_num, epid,
-+ (unsigned int)(urb_priv->first_sb),
-+ (unsigned int)(urb_priv->last_sb));
-+ }
-+
-+ if (urb->transfer_flags & URB_ISO_ASAP) {
-+ /* The isoc transfer should be started as soon as possible. The
-+ start_frame field is a return value if URB_ISO_ASAP was set. Comparing
-+ R_USB_FM_NUMBER with a USB Chief trace shows that the first isoc IN
-+ token is sent 2 frames later. I'm not sure how this affects usage of
-+ the start_frame field by the device driver, or how it affects things
-+ when USB_ISO_ASAP is not set, so therefore there's no compensation for
-+ the 2 frame "lag" here. */
-+ urb->start_frame = (*R_USB_FM_NUMBER & 0x7ff);
-+ TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
-+ urb_priv->urb_state = STARTED;
-+ isoc_dbg("URB_ISO_ASAP set, urb->start_frame set to %d\n",
-+ urb->start_frame);
-+ } else {
-+ /* Not started yet. */
-+ urb_priv->urb_state = NOT_STARTED;
-+ isoc_warn("urb_priv->urb_state set to NOT_STARTED for URB:0x%x\n",
-+ (unsigned int)urb);
-+ }
-+
-+ } else {
-+ /* An URB is already active on the EP. Leave URB in queue and let
-+ finish_isoc_urb process it after current active URB */
-+ ASSERT(TxIsocEPList[epid].sub != 0);
-+
-+ if(usb_pipein(urb->pipe)) {
-+ /* Because there already is a active In URB on this epid we do nothing
-+ and the finish_isoc_urb() function will handle switching to next URB*/
-+
-+ } else { /* For Out Isoc, insert new URBs traffic last in SB-list. */
-+ struct USB_SB_Desc *temp_sb_desc;
-+
-+ /* Set state STARTED to all Out Isoc URBs added to SB list because we
-+ don't know how many of them that are finished before descr interrupt*/
-+ urb_priv->urb_state = STARTED;
-+
-+ /* Find end of current SB list by looking for SB with eol flag sat */
-+ temp_sb_desc = phys_to_virt(TxIsocEPList[epid].sub);
-+ while ((temp_sb_desc->command & IO_MASK(USB_SB_command, eol)) !=
-+ IO_STATE(USB_SB_command, eol, yes)) {
-+ ASSERT(temp_sb_desc->next);
-+ temp_sb_desc = phys_to_virt(temp_sb_desc->next);
-+ }
-+
-+ isoc_dbg("Appended URB:0x%x[%d] (first:0x%x last:0x%x) to epid:%d"
-+ " sub:0x%x eol:0x%x\n",
-+ (unsigned int)urb, urb_priv->urb_num,
-+ (unsigned int)(urb_priv->first_sb),
-+ (unsigned int)(urb_priv->last_sb), epid,
-+ (unsigned int)phys_to_virt(TxIsocEPList[epid].sub),
-+ (unsigned int)temp_sb_desc);
-+
-+ /* Next pointer must be set before eol is removed. */
-+ temp_sb_desc->next = virt_to_phys(urb_priv->first_sb);
-+ /* Clear the previous end of list flag since there is a new in the
-+ added SB descriptor list. */
-+ temp_sb_desc->command &= ~IO_MASK(USB_SB_command, eol);
-+
-+ if (!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) {
-+ __u32 epid_data;
-+ /* 8.8.5 in Designer's Reference says we should check for and correct
-+ any errors in the EP here. That should not be necessary if
-+ epid_attn is handled correctly, so we assume all is ok. */
-+ epid_data = etrax_epid_iso_get(epid);
-+ if (IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data) !=
-+ IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
-+ isoc_err("Disabled Isoc EP with error:%d on epid:%d when appending"
-+ " URB:0x%x[%d]\n",
-+ IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data), epid,
-+ (unsigned int)urb, urb_priv->urb_num);
-+ }
-+
-+ /* The SB list was exhausted. */
-+ if (virt_to_phys(urb_priv->last_sb) != TxIsocEPList[epid].sub) {
-+ /* The new sublist did not get processed before the EP was
-+ disabled. Setup the EP again. */
-+
-+ if(virt_to_phys(temp_sb_desc) == TxIsocEPList[epid].sub) {
-+ isoc_dbg("EP for epid:%d stoped at SB:0x%x before newly inserted"
-+ ", restarting from this URBs SB:0x%x\n",
-+ epid, (unsigned int)temp_sb_desc,
-+ (unsigned int)(urb_priv->first_sb));
-+ TxIsocEPList[epid].hw_len = 0;
-+ TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
-+ urb->start_frame = (*R_USB_FM_NUMBER & 0x7ff);
-+ /* Enable the EP again so data gets processed this time */
-+ TxIsocEPList[epid].command |=
-+ IO_STATE(USB_EP_command, enable, yes);
-+
-+ } else {
-+ /* The EP has been disabled but not at end this URB (god knows
-+ where). This should generate an epid_attn so we should not be
-+ here */
-+ isoc_warn("EP was disabled on sb:0x%x before SB list for"
-+ " URB:0x%x[%d] got processed\n",
-+ (unsigned int)phys_to_virt(TxIsocEPList[epid].sub),
-+ (unsigned int)urb, urb_priv->urb_num);
-+ }
-+ } else {
-+ /* This might happend if we are slow on this function and isn't
-+ an error. */
-+ isoc_dbg("EP was disabled and finished with SBs from appended"
-+ " URB:0x%x[%d]\n", (unsigned int)urb, urb_priv->urb_num);
-+ }
-+ }
-+ }
-+ }
-+
-+ /* Start the DMA sub channel */
-+ *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start);
-+
-+ local_irq_restore(flags);
-+}
-+#endif
-+
-+static void tc_dma_unlink_intr_urb(struct urb *urb) {
-+ struct crisv10_urb_priv *urb_priv = urb->hcpriv;
-+ volatile struct USB_EP_Desc *first_ep; /* First EP in the list. */
-+ volatile struct USB_EP_Desc *curr_ep; /* Current EP, the iterator. */
-+ volatile struct USB_EP_Desc *next_ep; /* The EP after current. */
-+ volatile struct USB_EP_Desc *unlink_ep; /* The one we should remove from
-+ the list. */
-+ int count = 0;
-+ volatile int timeout = 10000;
-+ int epid;
-+
-+ /* Read 8.8.4 in Designer's Reference, "Removing an EP Descriptor from the
-+ List". */
-+ ASSERT(urb_priv);
-+ ASSERT(urb_priv->intr_ep_pool_length > 0);
-+ epid = urb_priv->epid;
-+
-+ /* First disable all Intr EPs belonging to epid for this URB */
-+ first_ep = &TxIntrEPList[0];
-+ curr_ep = first_ep;
-+ do {
-+ next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
-+ if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
-+ /* Disable EP */
-+ next_ep->command &= ~IO_MASK(USB_EP_command, enable);
-+ }
-+ curr_ep = phys_to_virt(curr_ep->next);
-+ } while (curr_ep != first_ep);
-+
-+
-+ /* Now unlink all EPs belonging to this epid from Descr list */
-+ first_ep = &TxIntrEPList[0];
-+ curr_ep = first_ep;
-+ do {
-+ next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
-+ if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
-+ /* This is the one we should unlink. */
-+ unlink_ep = next_ep;
-+
-+ /* Actually unlink the EP from the DMA list. */
-+ curr_ep->next = unlink_ep->next;
-+
-+ /* Wait until the DMA is no longer at this descriptor. */
-+ while((*R_DMA_CH8_SUB2_EP == virt_to_phys(unlink_ep)) &&
-+ (timeout-- > 0));
-+ if(timeout == 0) {
-+ warn("Timeout while waiting for DMA-TX-Intr to leave unlink EP\n");
-+ }
-+
-+ count++;
-+ }
-+ curr_ep = phys_to_virt(curr_ep->next);
-+ } while (curr_ep != first_ep);
-+
-+ if(count != urb_priv->intr_ep_pool_length) {
-+ intr_warn("Unlinked %d of %d Intr EPs for URB:0x%x[%d]\n", count,
-+ urb_priv->intr_ep_pool_length, (unsigned int)urb,
-+ urb_priv->urb_num);
-+ } else {
-+ intr_dbg("Unlinked %d of %d interrupt EPs for URB:0x%x\n", count,
-+ urb_priv->intr_ep_pool_length, (unsigned int)urb);
-+ }
-+}
-+
-+static void check_finished_bulk_tx_epids(struct usb_hcd *hcd,
-+ int timer) {
-+ unsigned long flags;
-+ int epid;
-+ struct urb *urb;
-+ struct crisv10_urb_priv * urb_priv;
-+ __u32 epid_data;
-+
-+ /* Protect TxEPList */
-+ local_irq_save(flags);
-+
-+ for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
-+ /* A finished EP descriptor is disabled and has a valid sub pointer */
-+ if (!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) &&
-+ (TxBulkEPList[epid].sub != 0)) {
-+
-+ /* Get the active URB for this epid */
-+ urb = activeUrbList[epid];
-+ /* Sanity checks */
-+ ASSERT(urb);
-+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
-+ ASSERT(urb_priv);
-+
-+ /* Only handle finished out Bulk EPs here,
-+ and let RX interrupt take care of the rest */
-+ if(!epid_out_traffic(epid)) {
-+ continue;
-+ }
-+
-+ if(timer) {
-+ tc_warn("Found finished %s Bulk epid:%d URB:0x%x[%d] from timeout\n",
-+ epid_out_traffic(epid) ? "Out" : "In", epid, (unsigned int)urb,
-+ urb_priv->urb_num);
-+ } else {
-+ tc_dbg("Found finished %s Bulk epid:%d URB:0x%x[%d] from interrupt\n",
-+ epid_out_traffic(epid) ? "Out" : "In", epid, (unsigned int)urb,
-+ urb_priv->urb_num);
-+ }
-+
-+ if(urb_priv->urb_state == UNLINK) {
-+ /* This Bulk URB is requested to be unlinked, that means that the EP
-+ has been disabled and we might not have sent all data */
-+ tc_finish_urb(hcd, urb, urb->status);
-+ continue;
-+ }
-+
-+ ASSERT(urb_priv->urb_state == STARTED);
-+ if (phys_to_virt(TxBulkEPList[epid].sub) != urb_priv->last_sb) {
-+ tc_err("Endpoint got disabled before reaching last sb\n");
-+ }
-+
-+ epid_data = etrax_epid_get(epid);
-+ if (IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data) ==
-+ IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
-+ /* This means that the endpoint has no error, is disabled
-+ and had inserted traffic, i.e. transfer successfully completed. */
-+ tc_finish_urb(hcd, urb, 0);
-+ } else {
-+ /* Shouldn't happen. We expect errors to be caught by epid
-+ attention. */
-+ tc_err("Found disabled bulk EP desc (epid:%d error:%d)\n",
-+ epid, IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data));
-+ }
-+ } else {
-+ tc_dbg("Ignoring In Bulk epid:%d, let RX interrupt handle it\n", epid);
-+ }
-+ }
-+
-+ local_irq_restore(flags);
-+}
-+
-+static void check_finished_ctrl_tx_epids(struct usb_hcd *hcd) {
-+ unsigned long flags;
-+ int epid;
-+ struct urb *urb;
-+ struct crisv10_urb_priv * urb_priv;
-+ __u32 epid_data;
-+
-+ /* Protect TxEPList */
-+ local_irq_save(flags);
-+
-+ for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
-+ if(epid == DUMMY_EPID)
-+ continue;
-+
-+ /* A finished EP descriptor is disabled and has a valid sub pointer */
-+ if (!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) &&
-+ (TxCtrlEPList[epid].sub != 0)) {
-+
-+ /* Get the active URB for this epid */
-+ urb = activeUrbList[epid];
-+
-+ if(urb == NULL) {
-+ tc_warn("Found finished Ctrl epid:%d with no active URB\n", epid);
-+ continue;
-+ }
-+
-+ /* Sanity checks */
-+ ASSERT(usb_pipein(urb->pipe));
-+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
-+ ASSERT(urb_priv);
-+ if (phys_to_virt(TxCtrlEPList[epid].sub) != urb_priv->last_sb) {
-+ tc_err("Endpoint got disabled before reaching last sb\n");
-+ }
-+
-+ epid_data = etrax_epid_get(epid);
-+ if (IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data) ==
-+ IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
-+ /* This means that the endpoint has no error, is disabled
-+ and had inserted traffic, i.e. transfer successfully completed. */
-+
-+ /* Check if RX-interrupt for In Ctrl has been processed before
-+ finishing the URB */
-+ if(urb_priv->ctrl_rx_done) {
-+ tc_dbg("Finishing In Ctrl URB:0x%x[%d] in tx_interrupt\n",
-+ (unsigned int)urb, urb_priv->urb_num);
-+ tc_finish_urb(hcd, urb, 0);
-+ } else {
-+ /* If we get zout descriptor interrupt before RX was done for a
-+ In Ctrl transfer, then we flag that and it will be finished
-+ in the RX-Interrupt */
-+ urb_priv->ctrl_zout_done = 1;
-+ tc_dbg("Got zout descr interrupt before RX interrupt\n");
-+ }
-+ } else {
-+ /* Shouldn't happen. We expect errors to be caught by epid
-+ attention. */
-+ tc_err("Found disabled Ctrl EP desc (epid:%d URB:0x%x[%d]) error_code:%d\n", epid, (unsigned int)urb, urb_priv->urb_num, IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data));
-+ __dump_ep_desc(&(TxCtrlEPList[epid]));
-+ __dump_ept_data(epid);
-+ }
-+ }
-+ }
-+ local_irq_restore(flags);
-+}
-+
-+ /* hinko ignore usb_pipeisoc */
-+#if 0
-+/* This function goes through all epids that are setup for Out Isoc transfers
-+ and marks (isoc_out_done) all queued URBs that the DMA has finished
-+ transfer for.
-+ No URB completetion is done here to make interrupt routine return quickly.
-+ URBs are completed later with help of complete_isoc_bottom_half() that
-+ becomes schedules when this functions is finished. */
-+static void check_finished_isoc_tx_epids(void) {
-+ unsigned long flags;
-+ int epid;
-+ struct urb *urb;
-+ struct crisv10_urb_priv * urb_priv;
-+ struct USB_SB_Desc* sb_desc;
-+ int epid_done;
-+
-+ /* Protect TxIsocEPList */
-+ local_irq_save(flags);
-+
-+ for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
-+ if (TxIsocEPList[epid].sub == 0 || epid == INVALID_EPID ||
-+ !epid_out_traffic(epid)) {
-+ /* Nothing here to see. */
-+ continue;
-+ }
-+ ASSERT(epid_inuse(epid));
-+ ASSERT(epid_isoc(epid));
-+
-+ sb_desc = phys_to_virt(TxIsocEPList[epid].sub);
-+ /* Find the last descriptor of the currently active URB for this ep.
-+ This is the first descriptor in the sub list marked for a descriptor
-+ interrupt. */
-+ while (sb_desc && !IO_EXTRACT(USB_SB_command, intr, sb_desc->command)) {
-+ sb_desc = sb_desc->next ? phys_to_virt(sb_desc->next) : 0;
-+ }
-+ ASSERT(sb_desc);
-+
-+ isoc_dbg("Descr IRQ checking epid:%d sub:0x%x intr:0x%x\n",
-+ epid, (unsigned int)phys_to_virt(TxIsocEPList[epid].sub),
-+ (unsigned int)sb_desc);
-+
-+ urb = activeUrbList[epid];
-+ if(urb == NULL) {
-+ isoc_err("Isoc Descr irq on epid:%d with no active URB\n", epid);
-+ continue;
-+ }
-+
-+ epid_done = 0;
-+ while(urb && !epid_done) {
-+ /* Sanity check. */
-+ ASSERT(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
-+ ASSERT(usb_pipeout(urb->pipe));
-+
-+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
-+ ASSERT(urb_priv);
-+ ASSERT(urb_priv->urb_state == STARTED ||
-+ urb_priv->urb_state == UNLINK);
-+
-+ if (sb_desc != urb_priv->last_sb) {
-+ /* This urb has been sent. */
-+ urb_priv->isoc_out_done = 1;
-+
-+ } else { /* Found URB that has last_sb as the interrupt reason */
-+
-+ /* Check if EP has been disabled, meaning that all transfers are done*/
-+ if(!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) {
-+ ASSERT((sb_desc->command & IO_MASK(USB_SB_command, eol)) ==
-+ IO_STATE(USB_SB_command, eol, yes));
-+ ASSERT(sb_desc->next == 0);
-+ urb_priv->isoc_out_done = 1;
-+ } else {
-+ isoc_dbg("Skipping URB:0x%x[%d] because EP not disabled yet\n",
-+ (unsigned int)urb, urb_priv->urb_num);
-+ }
-+ /* Stop looking any further in queue */
-+ epid_done = 1;
-+ }
-+
-+ if (!epid_done) {
-+ if(urb == activeUrbList[epid]) {
-+ urb = urb_list_first(epid);
-+ } else {
-+ urb = urb_list_next(urb, epid);
-+ }
-+ }
-+ } /* END: while(urb && !epid_done) */
-+ }
-+
-+ local_irq_restore(flags);
-+}
-+
-+
-+/* This is where the Out Isoc URBs are realy completed. This function is
-+ scheduled from tc_dma_tx_interrupt() when one or more Out Isoc transfers
-+ are done. This functions completes all URBs earlier marked with
-+ isoc_out_done by fast interrupt routine check_finished_isoc_tx_epids() */
-+
-+static void complete_isoc_bottom_half(void *data) {
-+ struct crisv10_isoc_complete_data *comp_data;
-+ struct usb_iso_packet_descriptor *packet;
-+ struct crisv10_urb_priv * urb_priv;
-+ unsigned long flags;
-+ struct urb* urb;
-+ int epid_done;
-+ int epid;
-+ int i;
-+
-+ comp_data = (struct crisv10_isoc_complete_data*)data;
-+
-+ local_irq_save(flags);
-+
-+ for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
-+ if(!epid_inuse(epid) || !epid_isoc(epid) || !epid_out_traffic(epid) || epid == DUMMY_EPID) {
-+ /* Only check valid Out Isoc epids */
-+ continue;
-+ }
-+
-+ isoc_dbg("Isoc bottom-half checking epid:%d, sub:0x%x\n", epid,
-+ (unsigned int)phys_to_virt(TxIsocEPList[epid].sub));
-+
-+ /* The descriptor interrupt handler has marked all transmitted Out Isoc
-+ URBs with isoc_out_done. Now we traverse all epids and for all that
-+ have out Isoc traffic we traverse its URB list and complete the
-+ transmitted URBs. */
-+ epid_done = 0;
-+ while (!epid_done) {
-+
-+ /* Get the active urb (if any) */
-+ urb = activeUrbList[epid];
-+ if (urb == 0) {
-+ isoc_dbg("No active URB on epid:%d anymore\n", epid);
-+ epid_done = 1;
-+ continue;
-+ }
-+
-+ /* Sanity check. */
-+ ASSERT(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
-+ ASSERT(usb_pipeout(urb->pipe));
-+
-+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
-+ ASSERT(urb_priv);
-+
-+ if (!(urb_priv->isoc_out_done)) {
-+ /* We have reached URB that isn't flaged done yet, stop traversing. */
-+ isoc_dbg("Stoped traversing Out Isoc URBs on epid:%d"
-+ " before not yet flaged URB:0x%x[%d]\n",
-+ epid, (unsigned int)urb, urb_priv->urb_num);
-+ epid_done = 1;
-+ continue;
-+ }
-+
-+ /* This urb has been sent. */
-+ isoc_dbg("Found URB:0x%x[%d] that is flaged isoc_out_done\n",
-+ (unsigned int)urb, urb_priv->urb_num);
-+
-+ /* Set ok on transfered packets for this URB and finish it */
-+ for (i = 0; i < urb->number_of_packets; i++) {
-+ packet = &urb->iso_frame_desc[i];
-+ packet->status = 0;
-+ packet->actual_length = packet->length;
-+ }
-+ urb_priv->isoc_packet_counter = urb->number_of_packets;
-+ tc_finish_urb(comp_data->hcd, urb, 0);
-+
-+ } /* END: while(!epid_done) */
-+ } /* END: for(epid...) */
-+
-+ local_irq_restore(flags);
-+ kmem_cache_free(isoc_compl_cache, comp_data);
-+}
-+#endif
-+
-+static void check_finished_intr_tx_epids(struct usb_hcd *hcd) {
-+ unsigned long flags;
-+ int epid;
-+ struct urb *urb;
-+ struct crisv10_urb_priv * urb_priv;
-+ volatile struct USB_EP_Desc *curr_ep; /* Current EP, the iterator. */
-+ volatile struct USB_EP_Desc *next_ep; /* The EP after current. */
-+
-+ /* Protect TxintrEPList */
-+ local_irq_save(flags);
-+
-+ for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
-+ if(!epid_inuse(epid) || !epid_intr(epid) || !epid_out_traffic(epid)) {
-+ /* Nothing to see on this epid. Only check valid Out Intr epids */
-+ continue;
-+ }
-+
-+ urb = activeUrbList[epid];
-+ if(urb == 0) {
-+ intr_warn("Found Out Intr epid:%d with no active URB\n", epid);
-+ continue;
-+ }
-+
-+ /* Sanity check. */
-+ ASSERT(usb_pipetype(urb->pipe) == PIPE_INTERRUPT);
-+ ASSERT(usb_pipeout(urb->pipe));
-+
-+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
-+ ASSERT(urb_priv);
-+
-+ /* Go through EPs between first and second sof-EP. It's here Out Intr EPs
-+ are inserted.*/
-+ curr_ep = &TxIntrEPList[0];
-+ do {
-+ next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
-+ if(next_ep == urb_priv->intr_ep_pool[0]) {
-+ /* We found the Out Intr EP for this epid */
-+
-+ /* Disable it so it doesn't get processed again */
-+ next_ep->command &= ~IO_MASK(USB_EP_command, enable);
-+
-+ /* Finish the active Out Intr URB with status OK */
-+ tc_finish_urb(hcd, urb, 0);
-+ }
-+ curr_ep = phys_to_virt(curr_ep->next);
-+ } while (curr_ep != &TxIntrEPList[1]);
-+
-+ }
-+ local_irq_restore(flags);
-+}
-+
-+/* Interrupt handler for DMA8/IRQ24 with subchannels (called from hardware intr) */
-+static irqreturn_t tc_dma_tx_interrupt(int irq, void *vhc) {
-+ struct usb_hcd *hcd = (struct usb_hcd*)vhc;
-+ ASSERT(hcd);
-+
-+ if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub0_descr)) {
-+ /* Clear this interrupt */
-+ *R_DMA_CH8_SUB0_CLR_INTR = IO_STATE(R_DMA_CH8_SUB0_CLR_INTR, clr_descr, do);
-+ restart_dma8_sub0();
-+ }
-+
-+ if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub1_descr)) {
-+ /* Clear this interrupt */
-+ *R_DMA_CH8_SUB1_CLR_INTR = IO_STATE(R_DMA_CH8_SUB1_CLR_INTR, clr_descr, do);
-+ check_finished_ctrl_tx_epids(hcd);
-+ }
-+
-+ if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub2_descr)) {
-+ /* Clear this interrupt */
-+ *R_DMA_CH8_SUB2_CLR_INTR = IO_STATE(R_DMA_CH8_SUB2_CLR_INTR, clr_descr, do);
-+ check_finished_intr_tx_epids(hcd);
-+ }
-+
-+ /* hinko ignore usb_pipeisoc */
-+#if 0
-+ if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub3_descr)) {
-+ struct crisv10_isoc_complete_data* comp_data;
-+
-+ /* Flag done Out Isoc for later completion */
-+ check_finished_isoc_tx_epids();
-+
-+ /* Clear this interrupt */
-+ *R_DMA_CH8_SUB3_CLR_INTR = IO_STATE(R_DMA_CH8_SUB3_CLR_INTR, clr_descr, do);
-+ /* Schedule bottom half of Out Isoc completion function. This function
-+ finishes the URBs marked with isoc_out_done */
-+ comp_data = (struct crisv10_isoc_complete_data*)
-+ kmem_cache_alloc(isoc_compl_cache, GFP_ATOMIC);
-+ ASSERT(comp_data != NULL);
-+ comp_data ->hcd = hcd;
-+
-+ //INIT_WORK(&comp_data->usb_bh, complete_isoc_bottom_half, comp_data);
-+ INIT_WORK(&comp_data->usb_bh, complete_isoc_bottom_half);
-+ schedule_work(&comp_data->usb_bh);
-+ }
-+#endif
-+
-+ return IRQ_HANDLED;
-+}
-+
-+/* Interrupt handler for DMA9/IRQ25 (called from hardware intr) */
-+static irqreturn_t tc_dma_rx_interrupt(int irq, void *vhc) {
-+ unsigned long flags;
-+ struct urb *urb;
-+ struct usb_hcd *hcd = (struct usb_hcd*)vhc;
-+ struct crisv10_urb_priv *urb_priv;
-+ int epid = 0;
-+ int real_error;
-+
-+ ASSERT(hcd);
-+
-+ /* Clear this interrupt. */
-+ *R_DMA_CH9_CLR_INTR = IO_STATE(R_DMA_CH9_CLR_INTR, clr_eop, do);
-+
-+ /* Custom clear interrupt for this interrupt */
-+ /* The reason we cli here is that we call the driver's callback functions. */
-+ local_irq_save(flags);
-+
-+ /* Note that this while loop assumes that all packets span only
-+ one rx descriptor. */
-+ while(myNextRxDesc->status & IO_MASK(USB_IN_status, eop)) {
-+ epid = IO_EXTRACT(USB_IN_status, epid, myNextRxDesc->status);
-+ /* Get the active URB for this epid */
-+ urb = activeUrbList[epid];
-+
-+ ASSERT(epid_inuse(epid));
-+ if (!urb) {
-+ dma_err("No urb for epid %d in rx interrupt\n", epid);
-+ goto skip_out;
-+ }
-+
-+ /* Check if any errors on epid */
-+ real_error = 0;
-+ if (myNextRxDesc->status & IO_MASK(USB_IN_status, error)) {
-+ __u32 r_usb_ept_data;
-+
-+ if (usb_pipeisoc(urb->pipe)) {
-+ r_usb_ept_data = etrax_epid_iso_get(epid);
-+ if((r_usb_ept_data & IO_MASK(R_USB_EPT_DATA_ISO, valid)) &&
-+ (IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data) == 0) &&
-+ (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata))) {
-+ /* Not an error, just a failure to receive an expected iso
-+ in packet in this frame. This is not documented
-+ in the designers reference. Continue processing.
-+ */
-+ } else real_error = 1;
-+ } else real_error = 1;
-+ }
-+
-+ if(real_error) {
-+ dma_err("Error in RX descr on epid:%d for URB 0x%x",
-+ epid, (unsigned int)urb);
-+ dump_ept_data(epid);
-+ dump_in_desc(myNextRxDesc);
-+ goto skip_out;
-+ }
-+
-+ urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
-+ ASSERT(urb_priv);
-+ ASSERT(urb_priv->urb_state == STARTED ||
-+ urb_priv->urb_state == UNLINK);
-+
-+ if ((usb_pipetype(urb->pipe) == PIPE_BULK) ||
-+ (usb_pipetype(urb->pipe) == PIPE_CONTROL) ||
-+ (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) {
-+
-+ /* We get nodata for empty data transactions, and the rx descriptor's
-+ hw_len field is not valid in that case. No data to copy in other
-+ words. */
-+ if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) {
-+ /* No data to copy */
-+ } else {
-+ /*
-+ dma_dbg("Processing RX for URB:0x%x epid:%d (data:%d ofs:%d)\n",
-+ (unsigned int)urb, epid, myNextRxDesc->hw_len,
-+ urb_priv->rx_offset);
-+ */
-+ /* Only copy data if URB isn't flaged to be unlinked*/
-+ if(urb_priv->urb_state != UNLINK) {
-+ /* Make sure the data fits in the buffer. */
-+ if(urb_priv->rx_offset + myNextRxDesc->hw_len
-+ <= urb->transfer_buffer_length) {
-+
-+ /* Copy the data to URBs buffer */
-+ memcpy(urb->transfer_buffer + urb_priv->rx_offset,
-+ phys_to_virt(myNextRxDesc->buf), myNextRxDesc->hw_len);
-+ urb_priv->rx_offset += myNextRxDesc->hw_len;
-+ } else {
-+ /* Signal overflow when returning URB */
-+ urb->status = -EOVERFLOW;
-+ tc_finish_urb_later(hcd, urb, urb->status);
-+ }
-+ }
-+ }
-+
-+ /* Check if it was the last packet in the transfer */
-+ if (myNextRxDesc->status & IO_MASK(USB_IN_status, eot)) {
-+ /* Special handling for In Ctrl URBs. */
-+ if(usb_pipecontrol(urb->pipe) && usb_pipein(urb->pipe) &&
-+ !(urb_priv->ctrl_zout_done)) {
-+ /* Flag that RX part of Ctrl transfer is done. Because zout descr
-+ interrupt hasn't happend yet will the URB be finished in the
-+ TX-Interrupt. */
-+ urb_priv->ctrl_rx_done = 1;
-+ tc_dbg("Not finishing In Ctrl URB:0x%x from rx_interrupt, waiting"
-+ " for zout\n", (unsigned int)urb);
-+ } else {
-+ tc_finish_urb(hcd, urb, 0);
-+ }
-+ }
-+ } else { /* ISOC RX */
-+ /*
-+ isoc_dbg("Processing RX for epid:%d (URB:0x%x) ISOC pipe\n",
-+ epid, (unsigned int)urb);
-+ */
-+
-+ struct usb_iso_packet_descriptor *packet;
-+
-+ if (urb_priv->urb_state == UNLINK) {
-+ isoc_warn("Ignoring Isoc Rx data for urb being unlinked.\n");
-+ goto skip_out;
-+ } else if (urb_priv->urb_state == NOT_STARTED) {
-+ isoc_err("What? Got Rx data for Isoc urb that isn't started?\n");
-+ goto skip_out;
-+ }
-+
-+ packet = &urb->iso_frame_desc[urb_priv->isoc_packet_counter];
-+ ASSERT(packet);
-+ packet->status = 0;
-+
-+ if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) {
-+ /* We get nodata for empty data transactions, and the rx descriptor's
-+ hw_len field is not valid in that case. We copy 0 bytes however to
-+ stay in synch. */
-+ packet->actual_length = 0;
-+ } else {
-+ packet->actual_length = myNextRxDesc->hw_len;
-+ /* Make sure the data fits in the buffer. */
-+ ASSERT(packet->actual_length <= packet->length);
-+ memcpy(urb->transfer_buffer + packet->offset,
-+ phys_to_virt(myNextRxDesc->buf), packet->actual_length);
-+ if(packet->actual_length > 0)
-+ isoc_dbg("Copied %d bytes, packet %d for URB:0x%x[%d]\n",
-+ packet->actual_length, urb_priv->isoc_packet_counter,
-+ (unsigned int)urb, urb_priv->urb_num);
-+ }
-+
-+ /* Increment the packet counter. */
-+ urb_priv->isoc_packet_counter++;
-+
-+ /* Note that we don't care about the eot field in the rx descriptor's
-+ status. It will always be set for isoc traffic. */
-+ if (urb->number_of_packets == urb_priv->isoc_packet_counter) {
-+ /* Complete the urb with status OK. */
-+ tc_finish_urb(hcd, urb, 0);
-+ }
-+ }
-+
-+ skip_out:
-+ myNextRxDesc->status = 0;
-+ myNextRxDesc->command |= IO_MASK(USB_IN_command, eol);
-+ myLastRxDesc->command &= ~IO_MASK(USB_IN_command, eol);
-+ myLastRxDesc = myNextRxDesc;
-+ myNextRxDesc = phys_to_virt(myNextRxDesc->next);
-+ flush_etrax_cache();
-+ *R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, restart);
-+ }
-+
-+ local_irq_restore(flags);
-+
-+ return IRQ_HANDLED;
-+}
-+
-+static void tc_bulk_start_timer_func(unsigned long dummy) {
-+ /* We might enable an EP descriptor behind the current DMA position when
-+ it's about to decide that there are no more bulk traffic and it should
-+ stop the bulk channel.
-+ Therefore we periodically check if the bulk channel is stopped and there
-+ is an enabled bulk EP descriptor, in which case we start the bulk
-+ channel. */
-+
-+ if (!(*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd))) {
-+ int epid;
-+
-+ timer_dbg("bulk_start_timer: Bulk DMA channel not running.\n");
-+
-+ for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
-+ if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
-+ timer_warn("Found enabled EP for epid %d, starting bulk channel.\n",
-+ epid);
-+ restart_dma8_sub0();
-+
-+ /* Restart the bulk eot timer since we just started the bulk channel.*/
-+ mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
-+
-+ /* No need to search any further. */
-+ break;
-+ }
-+ }
-+ } else {
-+ timer_dbg("bulk_start_timer: Bulk DMA channel running.\n");
-+ }
-+}
-+
-+static void tc_bulk_eot_timer_func(unsigned long dummy) {
-+ struct usb_hcd *hcd = (struct usb_hcd*)dummy;
-+ ASSERT(hcd);
-+ /* Because of a race condition in the top half, we might miss a bulk eot.
-+ This timer "simulates" a bulk eot if we don't get one for a while,
-+ hopefully correcting the situation. */
-+ timer_dbg("bulk_eot_timer timed out.\n");
-+ check_finished_bulk_tx_epids(hcd, 1);
-+}
-+
-+
-+/*************************************************************/
-+/*************************************************************/
-+/* Device driver block */
-+/*************************************************************/
-+/*************************************************************/
-+
-+/* Forward declarations for device driver functions */
-+static int devdrv_hcd_probe(struct device *);
-+static int devdrv_hcd_remove(struct device *);
-+#ifdef CONFIG_PM
-+static int devdrv_hcd_suspend(struct device *, u32, u32);
-+static int devdrv_hcd_resume(struct device *, u32);
-+#endif /* CONFIG_PM */
-+
-+/* the device */
-+static struct platform_device *devdrv_hc_platform_device;
-+
-+/* device driver interface */
-+static struct device_driver devdrv_hc_device_driver = {
-+ .name = (char *) hc_name,
-+ .bus = &platform_bus_type,
-+
-+ .probe = devdrv_hcd_probe,
-+ .remove = devdrv_hcd_remove,
-+
-+#ifdef CONFIG_PM
-+ .suspend = devdrv_hcd_suspend,
-+ .resume = devdrv_hcd_resume,
-+#endif /* CONFIG_PM */
-+};
-+
-+/* initialize the host controller and driver */
-+static int __init_or_module devdrv_hcd_probe(struct device *dev)
-+{
-+ struct usb_hcd *hcd;
-+ struct crisv10_hcd *crisv10_hcd;
-+ int retval;
-+
-+ /* Check DMA burst length */
-+ if(IO_EXTRACT(R_BUS_CONFIG, dma_burst, *R_BUS_CONFIG) !=
-+ IO_STATE(R_BUS_CONFIG, dma_burst, burst32)) {
-+ devdrv_err("Invalid DMA burst length in Etrax 100LX,"
-+ " needs to be 32\n");
-+ return -EPERM;
-+ }
-+
-+ hcd = usb_create_hcd(&crisv10_hc_driver, dev, dev->bus_id);
-+ if (!hcd)
-+ return -ENOMEM;
-+
-+ crisv10_hcd = hcd_to_crisv10_hcd(hcd);
-+ spin_lock_init(&crisv10_hcd->lock);
-+ crisv10_hcd->num_ports = num_ports();
-+ crisv10_hcd->running = 0;
-+
-+ dev_set_drvdata(dev, crisv10_hcd);
-+
-+ devdrv_dbg("ETRAX USB IRQs HC:%d RX:%d TX:%d\n", ETRAX_USB_HC_IRQ,
-+ ETRAX_USB_RX_IRQ, ETRAX_USB_TX_IRQ);
-+
-+ /* Print out chip version read from registers */
-+ int rev_maj = *R_USB_REVISION & IO_MASK(R_USB_REVISION, major);
-+ int rev_min = *R_USB_REVISION & IO_MASK(R_USB_REVISION, minor);
-+ if(rev_min == 0) {
-+ devdrv_info("Etrax 100LX USB Revision %d v1,2\n", rev_maj);
-+ } else {
-+ devdrv_info("Etrax 100LX USB Revision %d v%d\n", rev_maj, rev_min);
-+ }
-+
-+ devdrv_info("Bulk timer interval, start:%d eot:%d\n",
-+ BULK_START_TIMER_INTERVAL,
-+ BULK_EOT_TIMER_INTERVAL);
-+
-+
-+ /* Init root hub data structures */
-+ if(rh_init()) {
-+ devdrv_err("Failed init data for Root Hub\n");
-+ retval = -ENOMEM;
-+ }
-+
-+ if(port_in_use(0)) {
-+ if (cris_request_io_interface(if_usb_1, "ETRAX100LX USB-HCD")) {
-+ printk(KERN_CRIT "usb-host: request IO interface usb1 failed");
-+ retval = -EBUSY;
-+ goto out;
-+ }
-+ devdrv_info("Claimed interface for USB physical port 1\n");
-+ }
-+ if(port_in_use(1)) {
-+ if (cris_request_io_interface(if_usb_2, "ETRAX100LX USB-HCD")) {
-+ /* Free first interface if second failed to be claimed */
-+ if(port_in_use(0)) {
-+ cris_free_io_interface(if_usb_1);
-+ }
-+ printk(KERN_CRIT "usb-host: request IO interface usb2 failed");
-+ retval = -EBUSY;
-+ goto out;
-+ }
-+ devdrv_info("Claimed interface for USB physical port 2\n");
-+ }
-+
-+ /* Init transfer controller structs and locks */
-+ if((retval = tc_init(hcd)) != 0) {
-+ goto out;
-+ }
-+
-+ /* Attach interrupt functions for DMA and init DMA controller */
-+ if((retval = tc_dma_init(hcd)) != 0) {
-+ goto out;
-+ }
-+
-+ /* Attach the top IRQ handler for USB controller interrupts */
-+ if (request_irq(ETRAX_USB_HC_IRQ, crisv10_hcd_top_irq, 0,
-+ "ETRAX 100LX built-in USB (HC)", hcd)) {
-+ err("Could not allocate IRQ %d for USB", ETRAX_USB_HC_IRQ);
-+ retval = -EBUSY;
-+ goto out;
-+ }
-+
-+ /* iso_eof is only enabled when isoc traffic is running. */
-+ *R_USB_IRQ_MASK_SET =
-+ /* IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set) | */
-+ IO_STATE(R_USB_IRQ_MASK_SET, bulk_eot, set) |
-+ IO_STATE(R_USB_IRQ_MASK_SET, epid_attn, set) |
-+ IO_STATE(R_USB_IRQ_MASK_SET, port_status, set) |
-+ IO_STATE(R_USB_IRQ_MASK_SET, ctl_status, set);
-+
-+
-+ crisv10_ready_wait();
-+ /* Reset the USB interface. */
-+ *R_USB_COMMAND =
-+ IO_STATE(R_USB_COMMAND, port_sel, nop) |
-+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
-+ IO_STATE(R_USB_COMMAND, ctrl_cmd, reset);
-+
-+ /* Designer's Reference, p. 8 - 10 says we should Initate R_USB_FM_PSTART to
-+ 0x2A30 (10800), to guarantee that control traffic gets 10% of the
-+ bandwidth, and periodic transfer may allocate the rest (90%).
-+ This doesn't work though.
-+ The value 11960 is chosen to be just after the SOF token, with a couple
-+ of bit times extra for possible bit stuffing. */
-+ *R_USB_FM_PSTART = IO_FIELD(R_USB_FM_PSTART, value, 11960);
-+
-+ crisv10_ready_wait();
-+ /* Configure the USB interface as a host controller. */
-+ *R_USB_COMMAND =
-+ IO_STATE(R_USB_COMMAND, port_sel, nop) |
-+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
-+ IO_STATE(R_USB_COMMAND, ctrl_cmd, host_config);
-+
-+
-+ /* Check so controller not busy before enabling ports */
-+ crisv10_ready_wait();
-+
-+ /* Enable selected USB ports */
-+ if(port_in_use(0)) {
-+ *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no);
-+ } else {
-+ *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, yes);
-+ }
-+ if(port_in_use(1)) {
-+ *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no);
-+ } else {
-+ *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, yes);
-+ }
-+
-+ crisv10_ready_wait();
-+ /* Start processing of USB traffic. */
-+ *R_USB_COMMAND =
-+ IO_STATE(R_USB_COMMAND, port_sel, nop) |
-+ IO_STATE(R_USB_COMMAND, port_cmd, reset) |
-+ IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
-+
-+ /* Do not continue probing initialization before USB interface is done */
-+ crisv10_ready_wait();
-+
-+ /* Register our Host Controller to USB Core
-+ * Finish the remaining parts of generic HCD initialization: allocate the
-+ * buffers of consistent memory, register the bus
-+ * and call the driver's reset() and start() routines. */
-+ retval = usb_add_hcd(hcd, ETRAX_USB_HC_IRQ, IRQF_DISABLED);
-+ if (retval != 0) {
-+ devdrv_err("Failed registering HCD driver\n");
-+ goto out;
-+ }
-+
-+ return 0;
-+
-+ out:
-+ devdrv_hcd_remove(dev);
-+ return retval;
-+}
-+
-+
-+/* cleanup after the host controller and driver */
-+static int __init_or_module devdrv_hcd_remove(struct device *dev)
-+{
-+ struct crisv10_hcd *crisv10_hcd = dev_get_drvdata(dev);
-+ struct usb_hcd *hcd;
-+
-+ if (!crisv10_hcd)
-+ return 0;
-+ hcd = crisv10_hcd_to_hcd(crisv10_hcd);
-+
-+
-+ /* Stop USB Controller in Etrax 100LX */
-+ crisv10_hcd_reset(hcd);
-+
-+ usb_remove_hcd(hcd);
-+ devdrv_dbg("Removed HCD from USB Core\n");
-+
-+ /* Free USB Controller IRQ */
-+ free_irq(ETRAX_USB_HC_IRQ, NULL);
-+
-+ /* Free resources */
-+ tc_dma_destroy();
-+ tc_destroy();
-+
-+
-+ if(port_in_use(0)) {
-+ cris_free_io_interface(if_usb_1);
-+ }
-+ if(port_in_use(1)) {
-+ cris_free_io_interface(if_usb_2);
-+ }
-+
-+ devdrv_dbg("Freed all claimed resources\n");
-+
-+ return 0;
-+}
-+
-+
-+#ifdef CONFIG_PM
-+
-+static int devdrv_hcd_suspend(struct usb_hcd *hcd, u32 state, u32 level)
-+{
-+ return 0; /* no-op for now */
-+}
-+
-+static int devdrv_hcd_resume(struct usb_hcd *hcd, u32 level)
-+{
-+ return 0; /* no-op for now */
-+}
-+
-+#endif /* CONFIG_PM */
-+
-+
-+
-+/*************************************************************/
-+/*************************************************************/
-+/* Module block */
-+/*************************************************************/
-+/*************************************************************/
-+
-+/* register driver */
-+static int __init module_hcd_init(void)
-+{
-+
-+ if (usb_disabled())
-+ return -ENODEV;
-+
-+ /* Here we select enabled ports by following defines created from
-+ menuconfig */
-+#ifndef CONFIG_ETRAX_USB_HOST_PORT1
-+ ports &= ~(1<<0);
-+#endif
-+#ifndef CONFIG_ETRAX_USB_HOST_PORT2
-+ ports &= ~(1<<1);
-+#endif
-+
-+ printk(KERN_INFO "%s version "VERSION" "COPYRIGHT"\n", product_desc);
-+
-+ devdrv_hc_platform_device =
-+ platform_device_register_simple((char *) hc_name, 0, NULL, 0);
-+
-+ if (IS_ERR(devdrv_hc_platform_device))
-+ return PTR_ERR(devdrv_hc_platform_device);
-+ return driver_register(&devdrv_hc_device_driver);
-+ /*
-+ * Note that we do not set the DMA mask for the device,
-+ * i.e. we pretend that we will use PIO, since no specific
-+ * allocation routines are needed for DMA buffers. This will
-+ * cause the HCD buffer allocation routines to fall back to
-+ * kmalloc().
-+ */
-+}
-+
-+/* unregister driver */
-+static void __exit module_hcd_exit(void)
-+{
-+ driver_unregister(&devdrv_hc_device_driver);
-+}
-+
-+
-+/* Module hooks */
-+module_init(module_hcd_init);
-+module_exit(module_hcd_exit);
---- /dev/null
-+++ b/drivers/usb/host/hc-crisv10.h
-@@ -0,0 +1,331 @@
-+#ifndef __LINUX_ETRAX_USB_H
-+#define __LINUX_ETRAX_USB_H
-+
-+#include <linux/types.h>
-+#include <linux/list.h>
-+
-+struct USB_IN_Desc {
-+ volatile __u16 sw_len;
-+ volatile __u16 command;
-+ volatile unsigned long next;
-+ volatile unsigned long buf;
-+ volatile __u16 hw_len;
-+ volatile __u16 status;
-+};
-+
-+struct USB_SB_Desc {
-+ volatile __u16 sw_len;
-+ volatile __u16 command;
-+ volatile unsigned long next;
-+ volatile unsigned long buf;
-+};
-+
-+struct USB_EP_Desc {
-+ volatile __u16 hw_len;
-+ volatile __u16 command;
-+ volatile unsigned long sub;
-+ volatile unsigned long next;
-+};
-+
-+
-+/* Root Hub port status struct */
-+struct crisv10_rh {
-+ volatile __u16 wPortChange[2];
-+ volatile __u16 wPortStatusPrev[2];
-+};
-+
-+/* HCD description */
-+struct crisv10_hcd {
-+ spinlock_t lock;
-+ __u8 num_ports;
-+ __u8 running;
-+};
-+
-+
-+/* Endpoint HC private data description */
-+struct crisv10_ep_priv {
-+ int epid;
-+};
-+
-+/* Additional software state info for a USB Controller epid */
-+struct etrax_epid {
-+ __u8 inuse; /* !0 = setup in Etrax and used for a endpoint */
-+ __u8 disabled; /* !0 = Temporarly disabled to avoid resubmission */
-+ __u8 type; /* Setup as: PIPE_BULK, PIPE_CONTROL ... */
-+ __u8 out_traffic; /* !0 = This epid is for out traffic */
-+};
-+
-+/* Struct to hold information of scheduled later URB completion */
-+struct urb_later_data {
-+// struct work_struct ws;
-+ struct delayed_work ws;
-+ struct usb_hcd *hcd;
-+ struct urb *urb;
-+ int urb_num;
-+ int status;
-+};
-+
-+
-+typedef enum {
-+ STARTED,
-+ NOT_STARTED,
-+ UNLINK,
-+} crisv10_urb_state_t;
-+
-+
-+struct crisv10_urb_priv {
-+ /* Sequence number for this URB. Every new submited URB gets this from
-+ a incrementing counter. Used when a URB is scheduled for later finish to
-+ be sure that the intended URB hasn't already been completed (device
-+ drivers has a tendency to reuse URBs once they are completed, causing us
-+ to not be able to single old ones out only based on the URB pointer.) */
-+ __u32 urb_num;
-+
-+ /* The first_sb field is used for freeing all SB descriptors belonging
-+ to an urb. The corresponding ep descriptor's sub pointer cannot be
-+ used for this since the DMA advances the sub pointer as it processes
-+ the sb list. */
-+ struct USB_SB_Desc *first_sb;
-+
-+ /* The last_sb field referes to the last SB descriptor that belongs to
-+ this urb. This is important to know so we can free the SB descriptors
-+ that ranges between first_sb and last_sb. */
-+ struct USB_SB_Desc *last_sb;
-+
-+ /* The rx_offset field is used in ctrl and bulk traffic to keep track
-+ of the offset in the urb's transfer_buffer where incoming data should be
-+ copied to. */
-+ __u32 rx_offset;
-+
-+ /* Counter used in isochronous transfers to keep track of the
-+ number of packets received/transmitted. */
-+ __u32 isoc_packet_counter;
-+
-+ /* Flag that marks if this Isoc Out URB has finished it's transfer. Used
-+ because several URBs can be finished before list is processed */
-+ __u8 isoc_out_done;
-+
-+ /* This field is used to pass information about the urb's current state
-+ between the various interrupt handlers (thus marked volatile). */
-+ volatile crisv10_urb_state_t urb_state;
-+
-+ /* In Ctrl transfers consist of (at least) 3 packets: SETUP, IN and ZOUT.
-+ When DMA8 sub-channel 2 has processed the SB list for this sequence we
-+ get a interrupt. We also get a interrupt for In transfers and which
-+ one of these interrupts that comes first depends of data size and device.
-+ To be sure that we have got both interrupts before we complete the URB
-+ we have these to flags that shows which part that has completed.
-+ We can then check when we get one of the interrupts that if the other has
-+ occured it's safe for us to complete the URB, otherwise we set appropriate
-+ flag and do the completion when we get the other interrupt. */
-+ volatile unsigned char ctrl_zout_done;
-+ volatile unsigned char ctrl_rx_done;
-+
-+ /* Connection between the submitted urb and ETRAX epid number */
-+ __u8 epid;
-+
-+ /* The rx_data_list field is used for periodic traffic, to hold
-+ received data for later processing in the the complete_urb functions,
-+ where the data us copied to the urb's transfer_buffer. Basically, we
-+ use this intermediate storage because we don't know when it's safe to
-+ reuse the transfer_buffer (FIXME?). */
-+ struct list_head rx_data_list;
-+
-+
-+ /* The interval time rounded up to closest 2^N */
-+ int interval;
-+
-+ /* Pool of EP descriptors needed if it's a INTR transfer.
-+ Amount of EPs in pool correspons to how many INTR that should
-+ be inserted in TxIntrEPList (max 128, defined by MAX_INTR_INTERVAL) */
-+ struct USB_EP_Desc* intr_ep_pool[128];
-+
-+ /* The mount of EPs allocated for this INTR URB */
-+ int intr_ep_pool_length;
-+
-+ /* Pointer to info struct if URB is scheduled to be finished later */
-+ struct urb_later_data* later_data;
-+};
-+
-+
-+/* This struct is for passing data from the top half to the bottom half irq
-+ handlers */
-+struct crisv10_irq_reg {
-+ struct usb_hcd* hcd;
-+ __u32 r_usb_epid_attn;
-+ __u8 r_usb_status;
-+ __u16 r_usb_rh_port_status_1;
-+ __u16 r_usb_rh_port_status_2;
-+ __u32 r_usb_irq_mask_read;
-+ __u32 r_usb_fm_number;
-+ struct work_struct usb_bh;
-+};
-+
-+
-+/* This struct is for passing data from the isoc top half to the isoc bottom
-+ half. */
-+struct crisv10_isoc_complete_data {
-+ struct usb_hcd *hcd;
-+ struct urb *urb;
-+ struct work_struct usb_bh;
-+};
-+
-+/* Entry item for URB lists for each endpint */
-+typedef struct urb_entry
-+{
-+ struct urb *urb;
-+ struct list_head list;
-+} urb_entry_t;
-+
-+/* ---------------------------------------------------------------------------
-+ Virtual Root HUB
-+ ------------------------------------------------------------------------- */
-+/* destination of request */
-+#define RH_INTERFACE 0x01
-+#define RH_ENDPOINT 0x02
-+#define RH_OTHER 0x03
-+
-+#define RH_CLASS 0x20
-+#define RH_VENDOR 0x40
-+
-+/* Requests: bRequest << 8 | bmRequestType */
-+#define RH_GET_STATUS 0x0080
-+#define RH_CLEAR_FEATURE 0x0100
-+#define RH_SET_FEATURE 0x0300
-+#define RH_SET_ADDRESS 0x0500
-+#define RH_GET_DESCRIPTOR 0x0680
-+#define RH_SET_DESCRIPTOR 0x0700
-+#define RH_GET_CONFIGURATION 0x0880
-+#define RH_SET_CONFIGURATION 0x0900
-+#define RH_GET_STATE 0x0280
-+#define RH_GET_INTERFACE 0x0A80
-+#define RH_SET_INTERFACE 0x0B00
-+#define RH_SYNC_FRAME 0x0C80
-+/* Our Vendor Specific Request */
-+#define RH_SET_EP 0x2000
-+
-+
-+/* Hub port features */
-+#define RH_PORT_CONNECTION 0x00
-+#define RH_PORT_ENABLE 0x01
-+#define RH_PORT_SUSPEND 0x02
-+#define RH_PORT_OVER_CURRENT 0x03
-+#define RH_PORT_RESET 0x04
-+#define RH_PORT_POWER 0x08
-+#define RH_PORT_LOW_SPEED 0x09
-+#define RH_C_PORT_CONNECTION 0x10
-+#define RH_C_PORT_ENABLE 0x11
-+#define RH_C_PORT_SUSPEND 0x12
-+#define RH_C_PORT_OVER_CURRENT 0x13
-+#define RH_C_PORT_RESET 0x14
-+
-+/* Hub features */
-+#define RH_C_HUB_LOCAL_POWER 0x00
-+#define RH_C_HUB_OVER_CURRENT 0x01
-+
-+#define RH_DEVICE_REMOTE_WAKEUP 0x00
-+#define RH_ENDPOINT_STALL 0x01
-+
-+/* Our Vendor Specific feature */
-+#define RH_REMOVE_EP 0x00
-+
-+
-+#define RH_ACK 0x01
-+#define RH_REQ_ERR -1
-+#define RH_NACK 0x00
-+
-+/* Field definitions for */
-+
-+#define USB_IN_command__eol__BITNR 0 /* command macros */
-+#define USB_IN_command__eol__WIDTH 1
-+#define USB_IN_command__eol__no 0
-+#define USB_IN_command__eol__yes 1
-+
-+#define USB_IN_command__intr__BITNR 3
-+#define USB_IN_command__intr__WIDTH 1
-+#define USB_IN_command__intr__no 0
-+#define USB_IN_command__intr__yes 1
-+
-+#define USB_IN_status__eop__BITNR 1 /* status macros. */
-+#define USB_IN_status__eop__WIDTH 1
-+#define USB_IN_status__eop__no 0
-+#define USB_IN_status__eop__yes 1
-+
-+#define USB_IN_status__eot__BITNR 5
-+#define USB_IN_status__eot__WIDTH 1
-+#define USB_IN_status__eot__no 0
-+#define USB_IN_status__eot__yes 1
-+
-+#define USB_IN_status__error__BITNR 6
-+#define USB_IN_status__error__WIDTH 1
-+#define USB_IN_status__error__no 0
-+#define USB_IN_status__error__yes 1
-+
-+#define USB_IN_status__nodata__BITNR 7
-+#define USB_IN_status__nodata__WIDTH 1
-+#define USB_IN_status__nodata__no 0
-+#define USB_IN_status__nodata__yes 1
-+
-+#define USB_IN_status__epid__BITNR 8
-+#define USB_IN_status__epid__WIDTH 5
-+
-+#define USB_EP_command__eol__BITNR 0
-+#define USB_EP_command__eol__WIDTH 1
-+#define USB_EP_command__eol__no 0
-+#define USB_EP_command__eol__yes 1
-+
-+#define USB_EP_command__eof__BITNR 1
-+#define USB_EP_command__eof__WIDTH 1
-+#define USB_EP_command__eof__no 0
-+#define USB_EP_command__eof__yes 1
-+
-+#define USB_EP_command__intr__BITNR 3
-+#define USB_EP_command__intr__WIDTH 1
-+#define USB_EP_command__intr__no 0
-+#define USB_EP_command__intr__yes 1
-+
-+#define USB_EP_command__enable__BITNR 4
-+#define USB_EP_command__enable__WIDTH 1
-+#define USB_EP_command__enable__no 0
-+#define USB_EP_command__enable__yes 1
-+
-+#define USB_EP_command__hw_valid__BITNR 5
-+#define USB_EP_command__hw_valid__WIDTH 1
-+#define USB_EP_command__hw_valid__no 0
-+#define USB_EP_command__hw_valid__yes 1
-+
-+#define USB_EP_command__epid__BITNR 8
-+#define USB_EP_command__epid__WIDTH 5
-+
-+#define USB_SB_command__eol__BITNR 0 /* command macros. */
-+#define USB_SB_command__eol__WIDTH 1
-+#define USB_SB_command__eol__no 0
-+#define USB_SB_command__eol__yes 1
-+
-+#define USB_SB_command__eot__BITNR 1
-+#define USB_SB_command__eot__WIDTH 1
-+#define USB_SB_command__eot__no 0
-+#define USB_SB_command__eot__yes 1
-+
-+#define USB_SB_command__intr__BITNR 3
-+#define USB_SB_command__intr__WIDTH 1
-+#define USB_SB_command__intr__no 0
-+#define USB_SB_command__intr__yes 1
-+
-+#define USB_SB_command__tt__BITNR 4
-+#define USB_SB_command__tt__WIDTH 2
-+#define USB_SB_command__tt__zout 0
-+#define USB_SB_command__tt__in 1
-+#define USB_SB_command__tt__out 2
-+#define USB_SB_command__tt__setup 3
-+
-+
-+#define USB_SB_command__rem__BITNR 8
-+#define USB_SB_command__rem__WIDTH 6
-+
-+#define USB_SB_command__full__BITNR 6
-+#define USB_SB_command__full__WIDTH 1
-+#define USB_SB_command__full__no 0
-+#define USB_SB_command__full__yes 1
-+
-+#endif
projects / openwrt / staging / hauke.git / commitdiff