--- /dev/null
+/* -----------------------------------------------------------------------------
+ * Copyright (c) 2011 Ozmo Inc
+ * Released under the GNU General Public License Version 2 (GPLv2).
+ *
+ * This file provides protocol independent part of the implementation of the USB
+ * service for a PD.
+ * The implementation of this service is split into two parts the first of which
+ * is protocol independent and the second contains protocol specific details.
+ * This split is to allow alternative protocols to be defined.
+ * The implemenation of this service uses ozhcd.c to implement a USB HCD.
+ * -----------------------------------------------------------------------------
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/sched.h>
+#include <linux/netdevice.h>
+#include <linux/errno.h>
+#include <linux/input.h>
+#include <asm/unaligned.h>
+#include "ozconfig.h"
+#include "ozprotocol.h"
+#include "ozeltbuf.h"
+#include "ozpd.h"
+#include "ozproto.h"
+#include "ozusbif.h"
+#include "ozhcd.h"
+#include "oztrace.h"
+#include "ozalloc.h"
+#include "ozusbsvc.h"
+#include "ozevent.h"
+/*------------------------------------------------------------------------------
+ * This is called once when the driver is loaded to initialise the USB service.
+ * Context: process
+ */
+int oz_usb_init(void)
+{
+ oz_event_log(OZ_EVT_SERVICE, 1, OZ_APPID_USB, 0, 0);
+ return oz_hcd_init();
+}
+/*------------------------------------------------------------------------------
+ * This is called once when the driver is unloaded to terminate the USB service.
+ * Context: process
+ */
+void oz_usb_term(void)
+{
+ oz_event_log(OZ_EVT_SERVICE, 2, OZ_APPID_USB, 0, 0);
+ oz_hcd_term();
+}
+/*------------------------------------------------------------------------------
+ * This is called when the USB service is started or resumed for a PD.
+ * Context: softirq
+ */
+int oz_usb_start(struct oz_pd *pd, int resume)
+{
+ int rc = 0;
+ struct oz_usb_ctx *usb_ctx;
+ struct oz_usb_ctx *old_ctx = 0;
+ oz_event_log(OZ_EVT_SERVICE, 3, OZ_APPID_USB, 0, resume);
+ if (resume) {
+ oz_trace("USB service resumed.\n");
+ return 0;
+ }
+ oz_trace("USB service started.\n");
+ /* Create a USB context in case we need one. If we find the PD already
+ * has a USB context then we will destroy it.
+ */
+ usb_ctx = (struct oz_usb_ctx *)
+ oz_alloc(sizeof(struct oz_usb_ctx), GFP_ATOMIC);
+ if (usb_ctx == 0)
+ return -1;
+ memset(usb_ctx, 0, sizeof(struct oz_usb_ctx));
+ atomic_set(&usb_ctx->ref_count, 1);
+ usb_ctx->pd = pd;
+ usb_ctx->stopped = 0;
+ /* Install the USB context if the PD doesn't already have one.
+ * If it does already have one then destroy the one we have just
+ * created.
+ */
+ spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
+ old_ctx = pd->app_ctx[OZ_APPID_USB-1];
+ if (old_ctx == 0)
+ pd->app_ctx[OZ_APPID_USB-1] = usb_ctx;
+ oz_usb_get(pd->app_ctx[OZ_APPID_USB-1]);
+ spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
+ if (old_ctx) {
+ oz_trace("Already have USB context.\n");
+ oz_free(usb_ctx);
+ usb_ctx = old_ctx;
+ } else if (usb_ctx) {
+ /* Take a reference to the PD. This will be released when
+ * the USB context is destroyed.
+ */
+ oz_pd_get(pd);
+ }
+ /* If we already had a USB context and had obtained a port from
+ * the USB HCD then just reset the port. If we didn't have a port
+ * then report the arrival to the USB HCD so we get one.
+ */
+ if (usb_ctx->hport) {
+ oz_hcd_pd_reset(usb_ctx, usb_ctx->hport);
+ } else {
+ usb_ctx->hport = oz_hcd_pd_arrived(usb_ctx);
+ if (usb_ctx->hport == 0) {
+ oz_trace("USB hub returned null port.\n");
+ spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
+ pd->app_ctx[OZ_APPID_USB-1] = 0;
+ spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
+ oz_usb_put(usb_ctx);
+ rc = -1;
+ }
+ }
+ oz_usb_put(usb_ctx);
+ return rc;
+}
+/*------------------------------------------------------------------------------
+ * This is called when the USB service is stopped or paused for a PD.
+ * Context: softirq or process
+ */
+void oz_usb_stop(struct oz_pd *pd, int pause)
+{
+ struct oz_usb_ctx *usb_ctx;
+ oz_event_log(OZ_EVT_SERVICE, 4, OZ_APPID_USB, 0, pause);
+ if (pause) {
+ oz_trace("USB service paused.\n");
+ return;
+ }
+ spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
+ usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB-1];
+ pd->app_ctx[OZ_APPID_USB-1] = 0;
+ spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
+ if (usb_ctx) {
+ unsigned long tout = jiffies + HZ;
+ oz_trace("USB service stopping...\n");
+ usb_ctx->stopped = 1;
+ /* At this point the reference count on the usb context should
+ * be 2 - one from when we created it and one from the hcd
+ * which claims a reference. Since stopped = 1 no one else
+ * should get in but someone may already be in. So wait
+ * until they leave but timeout after 1 second.
+ */
+ while ((atomic_read(&usb_ctx->ref_count) > 2) &&
+ time_before(jiffies, tout))
+ ;
+ oz_trace("USB service stopped.\n");
+ oz_hcd_pd_departed(usb_ctx->hport);
+ /* Release the reference taken in oz_usb_start.
+ */
+ oz_usb_put(usb_ctx);
+ }
+}
+/*------------------------------------------------------------------------------
+ * This increments the reference count of the context area for a specific PD.
+ * This ensures this context area does not disappear while still in use.
+ * Context: softirq
+ */
+void oz_usb_get(void *hpd)
+{
+ struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
+ atomic_inc(&usb_ctx->ref_count);
+}
+/*------------------------------------------------------------------------------
+ * This decrements the reference count of the context area for a specific PD
+ * and destroys the context area if the reference count becomes zero.
+ * Context: softirq or process
+ */
+void oz_usb_put(void *hpd)
+{
+ struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
+ if (atomic_dec_and_test(&usb_ctx->ref_count)) {
+ oz_trace("Dealloc USB context.\n");
+ oz_pd_put(usb_ctx->pd);
+ oz_free(usb_ctx);
+ }
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq
+ */
+int oz_usb_heartbeat(struct oz_pd *pd)
+{
+ struct oz_usb_ctx *usb_ctx;
+ int rc = 0;
+ spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
+ usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB-1];
+ if (usb_ctx)
+ oz_usb_get(usb_ctx);
+ spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
+ if (usb_ctx == 0)
+ return rc;
+ if (usb_ctx->stopped)
+ goto done;
+ if (usb_ctx->hport)
+ if (oz_hcd_heartbeat(usb_ctx->hport))
+ rc = 1;
+done:
+ oz_usb_put(usb_ctx);
+ return rc;
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq
+ */
+int oz_usb_stream_create(void *hpd, u8 ep_num)
+{
+ struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
+ struct oz_pd *pd = usb_ctx->pd;
+ oz_trace("oz_usb_stream_create(0x%x)\n", ep_num);
+ if (pd->mode & OZ_F_ISOC_NO_ELTS) {
+ oz_isoc_stream_create(pd, ep_num);
+ } else {
+ oz_pd_get(pd);
+ if (oz_elt_stream_create(&pd->elt_buff, ep_num,
+ 4*pd->max_tx_size)) {
+ oz_pd_put(pd);
+ return -1;
+ }
+ }
+ return 0;
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq
+ */
+int oz_usb_stream_delete(void *hpd, u8 ep_num)
+{
+ struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
+ if (usb_ctx) {
+ struct oz_pd *pd = usb_ctx->pd;
+ if (pd) {
+ oz_trace("oz_usb_stream_delete(0x%x)\n", ep_num);
+ if (pd->mode & OZ_F_ISOC_NO_ELTS) {
+ oz_isoc_stream_delete(pd, ep_num);
+ } else {
+ if (oz_elt_stream_delete(&pd->elt_buff, ep_num))
+ return -1;
+ oz_pd_put(pd);
+ }
+ }
+ }
+ return 0;
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq or process
+ */
+void oz_usb_request_heartbeat(void *hpd)
+{
+ struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
+ if (usb_ctx && usb_ctx->pd)
+ oz_pd_request_heartbeat(usb_ctx->pd);
+}
--- /dev/null
+/* -----------------------------------------------------------------------------
+ * Copyright (c) 2011 Ozmo Inc
+ * Released under the GNU General Public License Version 2 (GPLv2).
+ *
+ * This file implements the protocol specific parts of the USB service for a PD.
+ * -----------------------------------------------------------------------------
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/sched.h>
+#include <linux/netdevice.h>
+#include <linux/errno.h>
+#include <linux/input.h>
+#include <asm/unaligned.h>
+#include "ozconfig.h"
+#include "ozprotocol.h"
+#include "ozeltbuf.h"
+#include "ozpd.h"
+#include "ozproto.h"
+#include "ozusbif.h"
+#include "ozhcd.h"
+#include "oztrace.h"
+#include "ozalloc.h"
+#include "ozusbsvc.h"
+#include "ozevent.h"
+/*------------------------------------------------------------------------------
+ */
+#define MAX_ISOC_FIXED_DATA (253-sizeof(struct oz_isoc_fixed))
+/*------------------------------------------------------------------------------
+ * Context: softirq
+ */
+static int oz_usb_submit_elt(struct oz_elt_buf *eb, struct oz_elt_info *ei,
+ struct oz_usb_ctx *usb_ctx, u8 strid, u8 isoc)
+{
+ int ret;
+ struct oz_elt *elt = (struct oz_elt *)ei->data;
+ struct oz_app_hdr *app_hdr = (struct oz_app_hdr *)(elt+1);
+ elt->type = OZ_ELT_APP_DATA;
+ ei->app_id = OZ_APPID_USB;
+ ei->length = elt->length + sizeof(struct oz_elt);
+ app_hdr->app_id = OZ_APPID_USB;
+ spin_lock_bh(&eb->lock);
+ if (isoc == 0) {
+ app_hdr->elt_seq_num = usb_ctx->tx_seq_num++;
+ if (usb_ctx->tx_seq_num == 0)
+ usb_ctx->tx_seq_num = 1;
+ }
+ ret = oz_queue_elt_info(eb, isoc, strid, ei);
+ if (ret)
+ oz_elt_info_free(eb, ei);
+ spin_unlock_bh(&eb->lock);
+ return ret;
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq
+ */
+int oz_usb_get_desc_req(void *hpd, u8 req_id, u8 req_type, u8 desc_type,
+ u8 index, u16 windex, int offset, int len)
+{
+ struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
+ struct oz_pd *pd = usb_ctx->pd;
+ struct oz_elt *elt;
+ struct oz_get_desc_req *body;
+ struct oz_elt_buf *eb = &pd->elt_buff;
+ struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
+ oz_trace(" req_type = 0x%x\n", req_type);
+ oz_trace(" desc_type = 0x%x\n", desc_type);
+ oz_trace(" index = 0x%x\n", index);
+ oz_trace(" windex = 0x%x\n", windex);
+ oz_trace(" offset = 0x%x\n", offset);
+ oz_trace(" len = 0x%x\n", len);
+ if (len > 200)
+ len = 200;
+ if (ei == 0)
+ return -1;
+ elt = (struct oz_elt *)ei->data;
+ elt->length = sizeof(struct oz_get_desc_req);
+ body = (struct oz_get_desc_req *)(elt+1);
+ body->type = OZ_GET_DESC_REQ;
+ body->req_id = req_id;
+ put_unaligned(cpu_to_le16(offset), &body->offset);
+ put_unaligned(cpu_to_le16(len), &body->size);
+ body->req_type = req_type;
+ body->desc_type = desc_type;
+ body->w_index = windex;
+ body->index = index;
+ return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
+}
+/*------------------------------------------------------------------------------
+ * Context: tasklet
+ */
+static int oz_usb_set_config_req(void *hpd, u8 req_id, u8 index)
+{
+ struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
+ struct oz_pd *pd = usb_ctx->pd;
+ struct oz_elt *elt;
+ struct oz_elt_buf *eb = &pd->elt_buff;
+ struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
+ struct oz_set_config_req *body;
+ if (ei == 0)
+ return -1;
+ elt = (struct oz_elt *)ei->data;
+ elt->length = sizeof(struct oz_set_config_req);
+ body = (struct oz_set_config_req *)(elt+1);
+ body->type = OZ_SET_CONFIG_REQ;
+ body->req_id = req_id;
+ body->index = index;
+ return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
+}
+/*------------------------------------------------------------------------------
+ * Context: tasklet
+ */
+static int oz_usb_set_interface_req(void *hpd, u8 req_id, u8 index, u8 alt)
+{
+ struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
+ struct oz_pd *pd = usb_ctx->pd;
+ struct oz_elt *elt;
+ struct oz_elt_buf *eb = &pd->elt_buff;
+ struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
+ struct oz_set_interface_req *body;
+ if (ei == 0)
+ return -1;
+ elt = (struct oz_elt *)ei->data;
+ elt->length = sizeof(struct oz_set_interface_req);
+ body = (struct oz_set_interface_req *)(elt+1);
+ body->type = OZ_SET_INTERFACE_REQ;
+ body->req_id = req_id;
+ body->index = index;
+ body->alternative = alt;
+ return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
+}
+/*------------------------------------------------------------------------------
+ * Context: tasklet
+ */
+static int oz_usb_set_clear_feature_req(void *hpd, u8 req_id, u8 type,
+ u8 recipient, u8 index, __le16 feature)
+{
+ struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
+ struct oz_pd *pd = usb_ctx->pd;
+ struct oz_elt *elt;
+ struct oz_elt_buf *eb = &pd->elt_buff;
+ struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
+ struct oz_feature_req *body;
+ if (ei == 0)
+ return -1;
+ elt = (struct oz_elt *)ei->data;
+ elt->length = sizeof(struct oz_feature_req);
+ body = (struct oz_feature_req *)(elt+1);
+ body->type = type;
+ body->req_id = req_id;
+ body->recipient = recipient;
+ body->index = index;
+ put_unaligned(feature, &body->feature);
+ return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
+}
+/*------------------------------------------------------------------------------
+ * Context: tasklet
+ */
+static int oz_usb_vendor_class_req(void *hpd, u8 req_id, u8 req_type,
+ u8 request, __le16 value, __le16 index, u8 *data, int data_len)
+{
+ struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
+ struct oz_pd *pd = usb_ctx->pd;
+ struct oz_elt *elt;
+ struct oz_elt_buf *eb = &pd->elt_buff;
+ struct oz_elt_info *ei = oz_elt_info_alloc(&pd->elt_buff);
+ struct oz_vendor_class_req *body;
+ if (ei == 0)
+ return -1;
+ elt = (struct oz_elt *)ei->data;
+ elt->length = sizeof(struct oz_vendor_class_req) - 1 + data_len;
+ body = (struct oz_vendor_class_req *)(elt+1);
+ body->type = OZ_VENDOR_CLASS_REQ;
+ body->req_id = req_id;
+ body->req_type = req_type;
+ body->request = request;
+ put_unaligned(value, &body->value);
+ put_unaligned(index, &body->index);
+ if (data_len)
+ memcpy(body->data, data, data_len);
+ return oz_usb_submit_elt(eb, ei, usb_ctx, 0, 0);
+}
+/*------------------------------------------------------------------------------
+ * Context: tasklet
+ */
+int oz_usb_control_req(void *hpd, u8 req_id, struct usb_ctrlrequest *setup,
+ u8 *data, int data_len)
+{
+ unsigned wvalue = le16_to_cpu(setup->wValue);
+ unsigned windex = le16_to_cpu(setup->wIndex);
+ unsigned wlength = le16_to_cpu(setup->wLength);
+ int rc = 0;
+ oz_event_log(OZ_EVT_CTRL_REQ, setup->bRequest, req_id,
+ (void *)(((unsigned long)(setup->wValue))<<16 |
+ ((unsigned long)setup->wIndex)),
+ setup->bRequestType);
+ if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
+ switch (setup->bRequest) {
+ case USB_REQ_GET_DESCRIPTOR:
+ rc = oz_usb_get_desc_req(hpd, req_id,
+ setup->bRequestType, (u8)(wvalue>>8),
+ (u8)wvalue, setup->wIndex, 0, wlength);
+ break;
+ case USB_REQ_SET_CONFIGURATION:
+ rc = oz_usb_set_config_req(hpd, req_id, (u8)wvalue);
+ break;
+ case USB_REQ_SET_INTERFACE: {
+ u8 if_num = (u8)windex;
+ u8 alt = (u8)wvalue;
+ rc = oz_usb_set_interface_req(hpd, req_id,
+ if_num, alt);
+ }
+ break;
+ case USB_REQ_SET_FEATURE:
+ rc = oz_usb_set_clear_feature_req(hpd, req_id,
+ OZ_SET_FEATURE_REQ,
+ setup->bRequestType & 0xf, (u8)windex,
+ setup->wValue);
+ break;
+ case USB_REQ_CLEAR_FEATURE:
+ rc = oz_usb_set_clear_feature_req(hpd, req_id,
+ OZ_CLEAR_FEATURE_REQ,
+ setup->bRequestType & 0xf,
+ (u8)windex, setup->wValue);
+ break;
+ }
+ } else {
+ rc = oz_usb_vendor_class_req(hpd, req_id, setup->bRequestType,
+ setup->bRequest, setup->wValue, setup->wIndex,
+ data, data_len);
+ }
+ return rc;
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq
+ */
+int oz_usb_send_isoc(void *hpd, u8 ep_num, struct urb *urb)
+{
+ struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd;
+ struct oz_pd *pd = usb_ctx->pd;
+ struct oz_elt_buf *eb;
+ int i;
+ int hdr_size;
+ u8 *data;
+ struct usb_iso_packet_descriptor *desc;
+
+ if (pd->mode & OZ_F_ISOC_NO_ELTS) {
+ for (i = 0; i < urb->number_of_packets; i++) {
+ u8 *data;
+ desc = &urb->iso_frame_desc[i];
+ data = ((u8 *)urb->transfer_buffer)+desc->offset;
+ oz_send_isoc_unit(pd, ep_num, data, desc->length);
+ }
+ return 0;
+ }
+
+ hdr_size = sizeof(struct oz_isoc_fixed) - 1;
+ eb = &pd->elt_buff;
+ i = 0;
+ while (i < urb->number_of_packets) {
+ struct oz_elt_info *ei = oz_elt_info_alloc(eb);
+ struct oz_elt *elt;
+ struct oz_isoc_fixed *body;
+ int unit_count;
+ int unit_size;
+ int rem;
+ if (ei == 0)
+ return -1;
+ rem = MAX_ISOC_FIXED_DATA;
+ elt = (struct oz_elt *)ei->data;
+ body = (struct oz_isoc_fixed *)(elt + 1);
+ body->type = OZ_USB_ENDPOINT_DATA;
+ body->endpoint = ep_num;
+ body->format = OZ_DATA_F_ISOC_FIXED;
+ unit_size = urb->iso_frame_desc[i].length;
+ body->unit_size = (u8)unit_size;
+ data = ((u8 *)(elt+1)) + hdr_size;
+ unit_count = 0;
+ while (i < urb->number_of_packets) {
+ desc = &urb->iso_frame_desc[i];
+ if ((unit_size == desc->length) &&
+ (desc->length <= rem)) {
+ memcpy(data, ((u8 *)urb->transfer_buffer) +
+ desc->offset, unit_size);
+ data += unit_size;
+ rem -= unit_size;
+ unit_count++;
+ desc->status = 0;
+ desc->actual_length = desc->length;
+ i++;
+ } else {
+ break;
+ }
+ }
+ elt->length = hdr_size + MAX_ISOC_FIXED_DATA - rem;
+ /* Store the number of units in body->frame_number for the
+ * moment. This field will be correctly determined before
+ * the element is sent. */
+ body->frame_number = (u8)unit_count;
+ oz_usb_submit_elt(eb, ei, usb_ctx, ep_num,
+ pd->mode & OZ_F_ISOC_ANYTIME);
+ }
+ return 0;
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq-serialized
+ */
+void oz_usb_handle_ep_data(struct oz_usb_ctx *usb_ctx,
+ struct oz_usb_hdr *usb_hdr, int len)
+{
+ struct oz_data *data_hdr = (struct oz_data *)usb_hdr;
+ switch (data_hdr->format) {
+ case OZ_DATA_F_MULTIPLE_FIXED: {
+ struct oz_multiple_fixed *body =
+ (struct oz_multiple_fixed *)data_hdr;
+ u8 *data = body->data;
+ int n = (len - sizeof(struct oz_multiple_fixed)+1)
+ / body->unit_size;
+ while (n--) {
+ oz_hcd_data_ind(usb_ctx->hport, body->endpoint,
+ data, body->unit_size);
+ data += body->unit_size;
+ }
+ }
+ break;
+ case OZ_DATA_F_ISOC_FIXED: {
+ struct oz_isoc_fixed *body =
+ (struct oz_isoc_fixed *)data_hdr;
+ int data_len = len-sizeof(struct oz_isoc_fixed)+1;
+ int unit_size = body->unit_size;
+ u8 *data = body->data;
+ int count;
+ int i;
+ if (!unit_size)
+ break;
+ count = data_len/unit_size;
+ for (i = 0; i < count; i++) {
+ oz_hcd_data_ind(usb_ctx->hport,
+ body->endpoint, data, unit_size);
+ data += unit_size;
+ }
+ }
+ break;
+ }
+
+}
+/*------------------------------------------------------------------------------
+ * This is called when the PD has received a USB element. The type of element
+ * is determined and is then passed to an appropriate handler function.
+ * Context: softirq-serialized
+ */
+void oz_usb_rx(struct oz_pd *pd, struct oz_elt *elt)
+{
+ struct oz_usb_hdr *usb_hdr = (struct oz_usb_hdr *)(elt + 1);
+ struct oz_usb_ctx *usb_ctx;
+
+ spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
+ usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB-1];
+ if (usb_ctx)
+ oz_usb_get(usb_ctx);
+ spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
+ if (usb_ctx == 0)
+ return; /* Context has gone so nothing to do. */
+ if (usb_ctx->stopped)
+ goto done;
+ /* If sequence number is non-zero then check it is not a duplicate.
+ * Zero sequence numbers are always accepted.
+ */
+ if (usb_hdr->elt_seq_num != 0) {
+ if (((usb_ctx->rx_seq_num - usb_hdr->elt_seq_num) & 0x80) == 0)
+ /* Reject duplicate element. */
+ goto done;
+ }
+ usb_ctx->rx_seq_num = usb_hdr->elt_seq_num;
+ switch (usb_hdr->type) {
+ case OZ_GET_DESC_RSP: {
+ struct oz_get_desc_rsp *body =
+ (struct oz_get_desc_rsp *)usb_hdr;
+ int data_len = elt->length -
+ sizeof(struct oz_get_desc_rsp) + 1;
+ u16 offs = le16_to_cpu(get_unaligned(&body->offset));
+ u16 total_size =
+ le16_to_cpu(get_unaligned(&body->total_size));
+ oz_trace("USB_REQ_GET_DESCRIPTOR - cnf\n");
+ oz_hcd_get_desc_cnf(usb_ctx->hport, body->req_id,
+ body->rcode, body->data,
+ data_len, offs, total_size);
+ }
+ break;
+ case OZ_SET_CONFIG_RSP: {
+ struct oz_set_config_rsp *body =
+ (struct oz_set_config_rsp *)usb_hdr;
+ oz_hcd_control_cnf(usb_ctx->hport, body->req_id,
+ body->rcode, 0, 0);
+ }
+ break;
+ case OZ_SET_INTERFACE_RSP: {
+ struct oz_set_interface_rsp *body =
+ (struct oz_set_interface_rsp *)usb_hdr;
+ oz_hcd_control_cnf(usb_ctx->hport,
+ body->req_id, body->rcode, 0, 0);
+ }
+ break;
+ case OZ_VENDOR_CLASS_RSP: {
+ struct oz_vendor_class_rsp *body =
+ (struct oz_vendor_class_rsp *)usb_hdr;
+ oz_hcd_control_cnf(usb_ctx->hport, body->req_id,
+ body->rcode, body->data, elt->length-
+ sizeof(struct oz_vendor_class_rsp)+1);
+ }
+ break;
+ case OZ_USB_ENDPOINT_DATA:
+ oz_usb_handle_ep_data(usb_ctx, usb_hdr, elt->length);
+ break;
+ }
+done:
+ oz_usb_put(usb_ctx);
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq, process
+ */
+void oz_usb_farewell(struct oz_pd *pd, u8 ep_num, u8 *data, u8 len)
+{
+ struct oz_usb_ctx *usb_ctx;
+ spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
+ usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB-1];
+ if (usb_ctx)
+ oz_usb_get(usb_ctx);
+ spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
+ if (usb_ctx == 0)
+ return; /* Context has gone so nothing to do. */
+ if (!usb_ctx->stopped) {
+ oz_trace("Farewell indicated ep = 0x%x\n", ep_num);
+ oz_hcd_data_ind(usb_ctx->hport, ep_num, data, len);
+ }
+ oz_usb_put(usb_ctx);
+}
projects / openwrt / staging / blogic.git / commitdiff