return ret;
}
+ linkmode_copy(support1, support);
+
iface = sfp_select_interface(pl->sfp_bus, id, config.advertising);
if (iface == PHY_INTERFACE_MODE_NA) {
- netdev_err(pl->netdev,
- "selection of interface failed, advertisement %*pb\n",
- __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising);
+ phylink_err(pl,
+ "selection of interface failed, advertisement %*pb\n",
+ __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising);
return -EINVAL;
}
config.interface = iface;
- ret = phylink_validate(pl, support, &config);
+ ret = phylink_validate(pl, support1, &config);
if (ret) {
- netdev_err(pl->netdev, "validation of %s/%s with support %*pb failed: %d\n",
- phylink_an_mode_str(MLO_AN_INBAND),
- phy_modes(config.interface),
- __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
+ phylink_err(pl, "validation of %s/%s with support %*pb failed: %d\n",
+ phylink_an_mode_str(MLO_AN_INBAND),
+ phy_modes(config.interface),
+ __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
return ret;
}
--- /dev/null
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
++// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Common data handling layer for ser_gigaset and usb_gigaset
+ *
+ * Copyright (c) 2005 by Tilman Schmidt <tilman@imap.cc>,
+ * Hansjoerg Lipp <hjlipp@web.de>,
+ * Stefan Eilers.
+ *
+ * =====================================================================
+ * =====================================================================
+ */
+
+#include "gigaset.h"
+#include <linux/crc-ccitt.h>
+#include <linux/bitrev.h>
+#include <linux/export.h>
+
+/* check if byte must be stuffed/escaped
+ * I'm not sure which data should be encoded.
+ * Therefore I will go the hard way and encode every value
+ * less than 0x20, the flag sequence and the control escape char.
+ */
+static inline int muststuff(unsigned char c)
+{
+ if (c < PPP_TRANS) return 1;
+ if (c == PPP_FLAG) return 1;
+ if (c == PPP_ESCAPE) return 1;
+ /* other possible candidates: */
+ /* 0x91: XON with parity set */
+ /* 0x93: XOFF with parity set */
+ return 0;
+}
+
+/* == data input =========================================================== */
+
+/* process a block of received bytes in command mode
+ * (mstate != MS_LOCKED && (inputstate & INS_command))
+ * Append received bytes to the command response buffer and forward them
+ * line by line to the response handler. Exit whenever a mode/state change
+ * might have occurred.
+ * Note: Received lines may be terminated by CR, LF, or CR LF, which will be
+ * removed before passing the line to the response handler.
+ * Return value:
+ * number of processed bytes
+ */
+static unsigned cmd_loop(unsigned numbytes, struct inbuf_t *inbuf)
+{
+ unsigned char *src = inbuf->data + inbuf->head;
+ struct cardstate *cs = inbuf->cs;
+ unsigned cbytes = cs->cbytes;
+ unsigned procbytes = 0;
+ unsigned char c;
+
+ while (procbytes < numbytes) {
+ c = *src++;
+ procbytes++;
+
+ switch (c) {
+ case '\n':
+ if (cbytes == 0 && cs->respdata[0] == '\r') {
+ /* collapse LF with preceding CR */
+ cs->respdata[0] = 0;
+ break;
+ }
+ /* fall through */
+ case '\r':
+ /* end of message line, pass to response handler */
+ if (cbytes >= MAX_RESP_SIZE) {
+ dev_warn(cs->dev, "response too large (%d)\n",
+ cbytes);
+ cbytes = MAX_RESP_SIZE;
+ }
+ cs->cbytes = cbytes;
+ gigaset_dbg_buffer(DEBUG_TRANSCMD, "received response",
+ cbytes, cs->respdata);
+ gigaset_handle_modem_response(cs);
+ cbytes = 0;
+
+ /* store EOL byte for CRLF collapsing */
+ cs->respdata[0] = c;
+
+ /* cs->dle may have changed */
+ if (cs->dle && !(inbuf->inputstate & INS_DLE_command))
+ inbuf->inputstate &= ~INS_command;
+
+ /* return for reevaluating state */
+ goto exit;
+
+ case DLE_FLAG:
+ if (inbuf->inputstate & INS_DLE_char) {
+ /* quoted DLE: clear quote flag */
+ inbuf->inputstate &= ~INS_DLE_char;
+ } else if (cs->dle ||
+ (inbuf->inputstate & INS_DLE_command)) {
+ /* DLE escape, pass up for handling */
+ inbuf->inputstate |= INS_DLE_char;
+ goto exit;
+ }
+ /* quoted or not in DLE mode: treat as regular data */
+ /* fall through */
+ default:
+ /* append to line buffer if possible */
+ if (cbytes < MAX_RESP_SIZE)
+ cs->respdata[cbytes] = c;
+ cbytes++;
+ }
+ }
+exit:
+ cs->cbytes = cbytes;
+ return procbytes;
+}
+
+/* process a block of received bytes in lock mode
+ * All received bytes are passed unmodified to the tty i/f.
+ * Return value:
+ * number of processed bytes
+ */
+static unsigned lock_loop(unsigned numbytes, struct inbuf_t *inbuf)
+{
+ unsigned char *src = inbuf->data + inbuf->head;
+
+ gigaset_dbg_buffer(DEBUG_LOCKCMD, "received response", numbytes, src);
+ gigaset_if_receive(inbuf->cs, src, numbytes);
+ return numbytes;
+}
+
+/* process a block of received bytes in HDLC data mode
+ * (mstate != MS_LOCKED && !(inputstate & INS_command) && proto2 == L2_HDLC)
+ * Collect HDLC frames, undoing byte stuffing and watching for DLE escapes.
+ * When a frame is complete, check the FCS and pass valid frames to the LL.
+ * If DLE is encountered, return immediately to let the caller handle it.
+ * Return value:
+ * number of processed bytes
+ */
+static unsigned hdlc_loop(unsigned numbytes, struct inbuf_t *inbuf)
+{
+ struct cardstate *cs = inbuf->cs;
+ struct bc_state *bcs = cs->bcs;
+ int inputstate = bcs->inputstate;
+ __u16 fcs = bcs->rx_fcs;
+ struct sk_buff *skb = bcs->rx_skb;
+ unsigned char *src = inbuf->data + inbuf->head;
+ unsigned procbytes = 0;
+ unsigned char c;
+
+ if (inputstate & INS_byte_stuff) {
+ if (!numbytes)
+ return 0;
+ inputstate &= ~INS_byte_stuff;
+ goto byte_stuff;
+ }
+
+ while (procbytes < numbytes) {
+ c = *src++;
+ procbytes++;
+ if (c == DLE_FLAG) {
+ if (inputstate & INS_DLE_char) {
+ /* quoted DLE: clear quote flag */
+ inputstate &= ~INS_DLE_char;
+ } else if (cs->dle || (inputstate & INS_DLE_command)) {
+ /* DLE escape, pass up for handling */
+ inputstate |= INS_DLE_char;
+ break;
+ }
+ }
+
+ if (c == PPP_ESCAPE) {
+ /* byte stuffing indicator: pull in next byte */
+ if (procbytes >= numbytes) {
+ /* end of buffer, save for later processing */
+ inputstate |= INS_byte_stuff;
+ break;
+ }
+byte_stuff:
+ c = *src++;
+ procbytes++;
+ if (c == DLE_FLAG) {
+ if (inputstate & INS_DLE_char) {
+ /* quoted DLE: clear quote flag */
+ inputstate &= ~INS_DLE_char;
+ } else if (cs->dle ||
+ (inputstate & INS_DLE_command)) {
+ /* DLE escape, pass up for handling */
+ inputstate |=
+ INS_DLE_char | INS_byte_stuff;
+ break;
+ }
+ }
+ c ^= PPP_TRANS;
+#ifdef CONFIG_GIGASET_DEBUG
+ if (!muststuff(c))
+ gig_dbg(DEBUG_HDLC, "byte stuffed: 0x%02x", c);
+#endif
+ } else if (c == PPP_FLAG) {
+ /* end of frame: process content if any */
+ if (inputstate & INS_have_data) {
+ gig_dbg(DEBUG_HDLC,
+ "7e----------------------------");
+
+ /* check and pass received frame */
+ if (!skb) {
+ /* skipped frame */
+ gigaset_isdn_rcv_err(bcs);
+ } else if (skb->len < 2) {
+ /* frame too short for FCS */
+ dev_warn(cs->dev,
+ "short frame (%d)\n",
+ skb->len);
+ gigaset_isdn_rcv_err(bcs);
+ dev_kfree_skb_any(skb);
+ } else if (fcs != PPP_GOODFCS) {
+ /* frame check error */
+ dev_err(cs->dev,
+ "Checksum failed, %u bytes corrupted!\n",
+ skb->len);
+ gigaset_isdn_rcv_err(bcs);
+ dev_kfree_skb_any(skb);
+ } else {
+ /* good frame */
+ __skb_trim(skb, skb->len - 2);
+ gigaset_skb_rcvd(bcs, skb);
+ }
+
+ /* prepare reception of next frame */
+ inputstate &= ~INS_have_data;
+ skb = gigaset_new_rx_skb(bcs);
+ } else {
+ /* empty frame (7E 7E) */
+#ifdef CONFIG_GIGASET_DEBUG
+ ++bcs->emptycount;
+#endif
+ if (!skb) {
+ /* skipped (?) */
+ gigaset_isdn_rcv_err(bcs);
+ skb = gigaset_new_rx_skb(bcs);
+ }
+ }
+
+ fcs = PPP_INITFCS;
+ continue;
+#ifdef CONFIG_GIGASET_DEBUG
+ } else if (muststuff(c)) {
+ /* Should not happen. Possible after ZDLE=1<CR><LF>. */
+ gig_dbg(DEBUG_HDLC, "not byte stuffed: 0x%02x", c);
+#endif
+ }
+
+ /* regular data byte, append to skb */
+#ifdef CONFIG_GIGASET_DEBUG
+ if (!(inputstate & INS_have_data)) {
+ gig_dbg(DEBUG_HDLC, "7e (%d x) ================",
+ bcs->emptycount);
+ bcs->emptycount = 0;
+ }
+#endif
+ inputstate |= INS_have_data;
+ if (skb) {
+ if (skb->len >= bcs->rx_bufsize) {
+ dev_warn(cs->dev, "received packet too long\n");
+ dev_kfree_skb_any(skb);
+ /* skip remainder of packet */
+ bcs->rx_skb = skb = NULL;
+ } else {
+ __skb_put_u8(skb, c);
+ fcs = crc_ccitt_byte(fcs, c);
+ }
+ }
+ }
+
+ bcs->inputstate = inputstate;
+ bcs->rx_fcs = fcs;
+ return procbytes;
+}
+
+/* process a block of received bytes in transparent data mode
+ * (mstate != MS_LOCKED && !(inputstate & INS_command) && proto2 != L2_HDLC)
+ * Invert bytes, undoing byte stuffing and watching for DLE escapes.
+ * If DLE is encountered, return immediately to let the caller handle it.
+ * Return value:
+ * number of processed bytes
+ */
+static unsigned iraw_loop(unsigned numbytes, struct inbuf_t *inbuf)
+{
+ struct cardstate *cs = inbuf->cs;
+ struct bc_state *bcs = cs->bcs;
+ int inputstate = bcs->inputstate;
+ struct sk_buff *skb = bcs->rx_skb;
+ unsigned char *src = inbuf->data + inbuf->head;
+ unsigned procbytes = 0;
+ unsigned char c;
+
+ if (!skb) {
+ /* skip this block */
+ gigaset_new_rx_skb(bcs);
+ return numbytes;
+ }
+
+ while (procbytes < numbytes && skb->len < bcs->rx_bufsize) {
+ c = *src++;
+ procbytes++;
+
+ if (c == DLE_FLAG) {
+ if (inputstate & INS_DLE_char) {
+ /* quoted DLE: clear quote flag */
+ inputstate &= ~INS_DLE_char;
+ } else if (cs->dle || (inputstate & INS_DLE_command)) {
+ /* DLE escape, pass up for handling */
+ inputstate |= INS_DLE_char;
+ break;
+ }
+ }
+
+ /* regular data byte: append to current skb */
+ inputstate |= INS_have_data;
+ __skb_put_u8(skb, bitrev8(c));
+ }
+
+ /* pass data up */
+ if (inputstate & INS_have_data) {
+ gigaset_skb_rcvd(bcs, skb);
+ inputstate &= ~INS_have_data;
+ gigaset_new_rx_skb(bcs);
+ }
+
+ bcs->inputstate = inputstate;
+ return procbytes;
+}
+
+/* process DLE escapes
+ * Called whenever a DLE sequence might be encountered in the input stream.
+ * Either processes the entire DLE sequence or, if that isn't possible,
+ * notes the fact that an initial DLE has been received in the INS_DLE_char
+ * inputstate flag and resumes processing of the sequence on the next call.
+ */
+static void handle_dle(struct inbuf_t *inbuf)
+{
+ struct cardstate *cs = inbuf->cs;
+
+ if (cs->mstate == MS_LOCKED)
+ return; /* no DLE processing in lock mode */
+
+ if (!(inbuf->inputstate & INS_DLE_char)) {
+ /* no DLE pending */
+ if (inbuf->data[inbuf->head] == DLE_FLAG &&
+ (cs->dle || inbuf->inputstate & INS_DLE_command)) {
+ /* start of DLE sequence */
+ inbuf->head++;
+ if (inbuf->head == inbuf->tail ||
+ inbuf->head == RBUFSIZE) {
+ /* end of buffer, save for later processing */
+ inbuf->inputstate |= INS_DLE_char;
+ return;
+ }
+ } else {
+ /* regular data byte */
+ return;
+ }
+ }
+
+ /* consume pending DLE */
+ inbuf->inputstate &= ~INS_DLE_char;
+
+ switch (inbuf->data[inbuf->head]) {
+ case 'X': /* begin of event message */
+ if (inbuf->inputstate & INS_command)
+ dev_notice(cs->dev,
+ "received <DLE>X in command mode\n");
+ inbuf->inputstate |= INS_command | INS_DLE_command;
+ inbuf->head++; /* byte consumed */
+ break;
+ case '.': /* end of event message */
+ if (!(inbuf->inputstate & INS_DLE_command))
+ dev_notice(cs->dev,
+ "received <DLE>. without <DLE>X\n");
+ inbuf->inputstate &= ~INS_DLE_command;
+ /* return to data mode if in DLE mode */
+ if (cs->dle)
+ inbuf->inputstate &= ~INS_command;
+ inbuf->head++; /* byte consumed */
+ break;
+ case DLE_FLAG: /* DLE in data stream */
+ /* mark as quoted */
+ inbuf->inputstate |= INS_DLE_char;
+ if (!(cs->dle || inbuf->inputstate & INS_DLE_command))
+ dev_notice(cs->dev,
+ "received <DLE><DLE> not in DLE mode\n");
+ break; /* quoted byte left in buffer */
+ default:
+ dev_notice(cs->dev, "received <DLE><%02x>\n",
+ inbuf->data[inbuf->head]);
+ /* quoted byte left in buffer */
+ }
+}
+
+/**
+ * gigaset_m10x_input() - process a block of data received from the device
+ * @inbuf: received data and device descriptor structure.
+ *
+ * Called by hardware module {ser,usb}_gigaset with a block of received
+ * bytes. Separates the bytes received over the serial data channel into
+ * user data and command replies (locked/unlocked) according to the
+ * current state of the interface.
+ */
+void gigaset_m10x_input(struct inbuf_t *inbuf)
+{
+ struct cardstate *cs = inbuf->cs;
+ unsigned numbytes, procbytes;
+
+ gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", inbuf->head, inbuf->tail);
+
+ while (inbuf->head != inbuf->tail) {
+ /* check for DLE escape */
+ handle_dle(inbuf);
+
+ /* process a contiguous block of bytes */
+ numbytes = (inbuf->head > inbuf->tail ?
+ RBUFSIZE : inbuf->tail) - inbuf->head;
+ gig_dbg(DEBUG_INTR, "processing %u bytes", numbytes);
+ /*
+ * numbytes may be 0 if handle_dle() ate the last byte.
+ * This does no harm, *_loop() will just return 0 immediately.
+ */
+
+ if (cs->mstate == MS_LOCKED)
+ procbytes = lock_loop(numbytes, inbuf);
+ else if (inbuf->inputstate & INS_command)
+ procbytes = cmd_loop(numbytes, inbuf);
+ else if (cs->bcs->proto2 == L2_HDLC)
+ procbytes = hdlc_loop(numbytes, inbuf);
+ else
+ procbytes = iraw_loop(numbytes, inbuf);
+ inbuf->head += procbytes;
+
+ /* check for buffer wraparound */
+ if (inbuf->head >= RBUFSIZE)
+ inbuf->head = 0;
+
+ gig_dbg(DEBUG_INTR, "head set to %u", inbuf->head);
+ }
+}
+EXPORT_SYMBOL_GPL(gigaset_m10x_input);
+
+
+/* == data output ========================================================== */
+
+/*
+ * Encode a data packet into an octet stuffed HDLC frame with FCS,
+ * opening and closing flags, preserving headroom data.
+ * parameters:
+ * skb skb containing original packet (freed upon return)
+ * Return value:
+ * pointer to newly allocated skb containing the result frame
+ * and the original link layer header, NULL on error
+ */
+static struct sk_buff *HDLC_Encode(struct sk_buff *skb)
+{
+ struct sk_buff *hdlc_skb;
+ __u16 fcs;
+ unsigned char c;
+ unsigned char *cp;
+ int len;
+ unsigned int stuf_cnt;
+
+ stuf_cnt = 0;
+ fcs = PPP_INITFCS;
+ cp = skb->data;
+ len = skb->len;
+ while (len--) {
+ if (muststuff(*cp))
+ stuf_cnt++;
+ fcs = crc_ccitt_byte(fcs, *cp++);
+ }
+ fcs ^= 0xffff; /* complement */
+
+ /* size of new buffer: original size + number of stuffing bytes
+ * + 2 bytes FCS + 2 stuffing bytes for FCS (if needed) + 2 flag bytes
+ * + room for link layer header
+ */
+ hdlc_skb = dev_alloc_skb(skb->len + stuf_cnt + 6 + skb->mac_len);
+ if (!hdlc_skb) {
+ dev_kfree_skb_any(skb);
+ return NULL;
+ }
+
+ /* Copy link layer header into new skb */
+ skb_reset_mac_header(hdlc_skb);
+ skb_reserve(hdlc_skb, skb->mac_len);
+ memcpy(skb_mac_header(hdlc_skb), skb_mac_header(skb), skb->mac_len);
+ hdlc_skb->mac_len = skb->mac_len;
+
+ /* Add flag sequence in front of everything.. */
+ skb_put_u8(hdlc_skb, PPP_FLAG);
+
+ /* Perform byte stuffing while copying data. */
+ while (skb->len--) {
+ if (muststuff(*skb->data)) {
+ skb_put_u8(hdlc_skb, PPP_ESCAPE);
+ skb_put_u8(hdlc_skb, (*skb->data++) ^ PPP_TRANS);
+ } else
+ skb_put_u8(hdlc_skb, *skb->data++);
+ }
+
+ /* Finally add FCS (byte stuffed) and flag sequence */
+ c = (fcs & 0x00ff); /* least significant byte first */
+ if (muststuff(c)) {
+ skb_put_u8(hdlc_skb, PPP_ESCAPE);
+ c ^= PPP_TRANS;
+ }
+ skb_put_u8(hdlc_skb, c);
+
+ c = ((fcs >> 8) & 0x00ff);
+ if (muststuff(c)) {
+ skb_put_u8(hdlc_skb, PPP_ESCAPE);
+ c ^= PPP_TRANS;
+ }
+ skb_put_u8(hdlc_skb, c);
+
+ skb_put_u8(hdlc_skb, PPP_FLAG);
+
+ dev_kfree_skb_any(skb);
+ return hdlc_skb;
+}
+
+/*
+ * Encode a data packet into an octet stuffed raw bit inverted frame,
+ * preserving headroom data.
+ * parameters:
+ * skb skb containing original packet (freed upon return)
+ * Return value:
+ * pointer to newly allocated skb containing the result frame
+ * and the original link layer header, NULL on error
+ */
+static struct sk_buff *iraw_encode(struct sk_buff *skb)
+{
+ struct sk_buff *iraw_skb;
+ unsigned char c;
+ unsigned char *cp;
+ int len;
+
+ /* size of new buffer (worst case = every byte must be stuffed):
+ * 2 * original size + room for link layer header
+ */
+ iraw_skb = dev_alloc_skb(2 * skb->len + skb->mac_len);
+ if (!iraw_skb) {
+ dev_kfree_skb_any(skb);
+ return NULL;
+ }
+
+ /* copy link layer header into new skb */
+ skb_reset_mac_header(iraw_skb);
+ skb_reserve(iraw_skb, skb->mac_len);
+ memcpy(skb_mac_header(iraw_skb), skb_mac_header(skb), skb->mac_len);
+ iraw_skb->mac_len = skb->mac_len;
+
+ /* copy and stuff data */
+ cp = skb->data;
+ len = skb->len;
+ while (len--) {
+ c = bitrev8(*cp++);
+ if (c == DLE_FLAG)
+ skb_put_u8(iraw_skb, c);
+ skb_put_u8(iraw_skb, c);
+ }
+ dev_kfree_skb_any(skb);
+ return iraw_skb;
+}
+
+/**
+ * gigaset_m10x_send_skb() - queue an skb for sending
+ * @bcs: B channel descriptor structure.
+ * @skb: data to send.
+ *
+ * Called by LL to encode and queue an skb for sending, and start
+ * transmission if necessary.
+ * Once the payload data has been transmitted completely, gigaset_skb_sent()
+ * will be called with the skb's link layer header preserved.
+ *
+ * Return value:
+ * number of bytes accepted for sending (skb->len) if ok,
+ * error code < 0 (eg. -ENOMEM) on error
+ */
+int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb)
+{
+ struct cardstate *cs = bcs->cs;
+ unsigned len = skb->len;
+ unsigned long flags;
+
+ if (bcs->proto2 == L2_HDLC)
+ skb = HDLC_Encode(skb);
+ else
+ skb = iraw_encode(skb);
+ if (!skb) {
+ dev_err(cs->dev,
+ "unable to allocate memory for encoding!\n");
+ return -ENOMEM;
+ }
+
+ skb_queue_tail(&bcs->squeue, skb);
+ spin_lock_irqsave(&cs->lock, flags);
+ if (cs->connected)
+ tasklet_schedule(&cs->write_tasklet);
+ spin_unlock_irqrestore(&cs->lock, flags);
+
+ return len; /* ok so far */
+}
+EXPORT_SYMBOL_GPL(gigaset_m10x_send_skb);
--- /dev/null
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
++// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * USB driver for Gigaset 307x base via direct USB connection.
+ *
+ * Copyright (c) 2001 by Hansjoerg Lipp <hjlipp@web.de>,
+ * Tilman Schmidt <tilman@imap.cc>,
+ * Stefan Eilers.
+ *
+ * =====================================================================
+ * =====================================================================
+ */
+
+#include "gigaset.h"
+#include <linux/usb.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+
+/* Version Information */
+#define DRIVER_AUTHOR "Tilman Schmidt <tilman@imap.cc>, Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
+#define DRIVER_DESC "USB Driver for Gigaset 307x"
+
+
+/* Module parameters */
+
+static int startmode = SM_ISDN;
+static int cidmode = 1;
+
+module_param(startmode, int, S_IRUGO);
+module_param(cidmode, int, S_IRUGO);
+MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
+MODULE_PARM_DESC(cidmode, "Call-ID mode");
+
+#define GIGASET_MINORS 1
+#define GIGASET_MINOR 16
+#define GIGASET_MODULENAME "bas_gigaset"
+#define GIGASET_DEVNAME "ttyGB"
+
+/* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
+#define IF_WRITEBUF 264
+
+/* interrupt pipe message size according to ibid. ch. 2.2 */
+#define IP_MSGSIZE 3
+
+/* Values for the Gigaset 307x */
+#define USB_GIGA_VENDOR_ID 0x0681
+#define USB_3070_PRODUCT_ID 0x0001
+#define USB_3075_PRODUCT_ID 0x0002
+#define USB_SX303_PRODUCT_ID 0x0021
+#define USB_SX353_PRODUCT_ID 0x0022
+
+/* table of devices that work with this driver */
+static const struct usb_device_id gigaset_table[] = {
+ { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3070_PRODUCT_ID) },
+ { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_3075_PRODUCT_ID) },
+ { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX303_PRODUCT_ID) },
+ { USB_DEVICE(USB_GIGA_VENDOR_ID, USB_SX353_PRODUCT_ID) },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, gigaset_table);
+
+/*======================= local function prototypes ==========================*/
+
+/* function called if a new device belonging to this driver is connected */
+static int gigaset_probe(struct usb_interface *interface,
+ const struct usb_device_id *id);
+
+/* Function will be called if the device is unplugged */
+static void gigaset_disconnect(struct usb_interface *interface);
+
+/* functions called before/after suspend */
+static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
+static int gigaset_resume(struct usb_interface *intf);
+
+/* functions called before/after device reset */
+static int gigaset_pre_reset(struct usb_interface *intf);
+static int gigaset_post_reset(struct usb_interface *intf);
+
+static int atread_submit(struct cardstate *, int);
+static void stopurbs(struct bas_bc_state *);
+static int req_submit(struct bc_state *, int, int, int);
+static int atwrite_submit(struct cardstate *, unsigned char *, int);
+static int start_cbsend(struct cardstate *);
+
+/*============================================================================*/
+
+struct bas_cardstate {
+ struct usb_device *udev; /* USB device pointer */
+ struct cardstate *cs;
+ struct usb_interface *interface; /* interface for this device */
+ unsigned char minor; /* starting minor number */
+
+ struct urb *urb_ctrl; /* control pipe default URB */
+ struct usb_ctrlrequest dr_ctrl;
+ struct timer_list timer_ctrl; /* control request timeout */
+ int retry_ctrl;
+
+ struct timer_list timer_atrdy; /* AT command ready timeout */
+ struct urb *urb_cmd_out; /* for sending AT commands */
+ struct usb_ctrlrequest dr_cmd_out;
+ int retry_cmd_out;
+
+ struct urb *urb_cmd_in; /* for receiving AT replies */
+ struct usb_ctrlrequest dr_cmd_in;
+ struct timer_list timer_cmd_in; /* receive request timeout */
+ unsigned char *rcvbuf; /* AT reply receive buffer */
+
+ struct urb *urb_int_in; /* URB for interrupt pipe */
+ unsigned char *int_in_buf;
+ struct work_struct int_in_wq; /* for usb_clear_halt() */
+ struct timer_list timer_int_in; /* int read retry delay */
+ int retry_int_in;
+
+ spinlock_t lock; /* locks all following */
+ int basstate; /* bitmap (BS_*) */
+ int pending; /* uncompleted base request */
+ wait_queue_head_t waitqueue;
+ int rcvbuf_size; /* size of AT receive buffer */
+ /* 0: no receive in progress */
+ int retry_cmd_in; /* receive req retry count */
+};
+
+/* status of direct USB connection to 307x base (bits in basstate) */
+#define BS_ATOPEN 0x001 /* AT channel open */
+#define BS_B1OPEN 0x002 /* B channel 1 open */
+#define BS_B2OPEN 0x004 /* B channel 2 open */
+#define BS_ATREADY 0x008 /* base ready for AT command */
+#define BS_INIT 0x010 /* base has signalled INIT_OK */
+#define BS_ATTIMER 0x020 /* waiting for HD_READY_SEND_ATDATA */
+#define BS_ATRDPEND 0x040 /* urb_cmd_in in use */
+#define BS_ATWRPEND 0x080 /* urb_cmd_out in use */
+#define BS_SUSPEND 0x100 /* USB port suspended */
+#define BS_RESETTING 0x200 /* waiting for HD_RESET_INTERRUPT_PIPE_ACK */
+
+
+static struct gigaset_driver *driver;
+
+/* usb specific object needed to register this driver with the usb subsystem */
+static struct usb_driver gigaset_usb_driver = {
+ .name = GIGASET_MODULENAME,
+ .probe = gigaset_probe,
+ .disconnect = gigaset_disconnect,
+ .id_table = gigaset_table,
+ .suspend = gigaset_suspend,
+ .resume = gigaset_resume,
+ .reset_resume = gigaset_post_reset,
+ .pre_reset = gigaset_pre_reset,
+ .post_reset = gigaset_post_reset,
+ .disable_hub_initiated_lpm = 1,
+};
+
+/* get message text for usb_submit_urb return code
+ */
+static char *get_usb_rcmsg(int rc)
+{
+ static char unkmsg[28];
+
+ switch (rc) {
+ case 0:
+ return "success";
+ case -ENOMEM:
+ return "out of memory";
+ case -ENODEV:
+ return "device not present";
+ case -ENOENT:
+ return "endpoint not present";
+ case -ENXIO:
+ return "URB type not supported";
+ case -EINVAL:
+ return "invalid argument";
+ case -EAGAIN:
+ return "start frame too early or too much scheduled";
+ case -EFBIG:
+ return "too many isoc frames requested";
+ case -EPIPE:
+ return "endpoint stalled";
+ case -EMSGSIZE:
+ return "invalid packet size";
+ case -ENOSPC:
+ return "would overcommit USB bandwidth";
+ case -ESHUTDOWN:
+ return "device shut down";
+ case -EPERM:
+ return "reject flag set";
+ case -EHOSTUNREACH:
+ return "device suspended";
+ default:
+ snprintf(unkmsg, sizeof(unkmsg), "unknown error %d", rc);
+ return unkmsg;
+ }
+}
+
+/* get message text for USB status code
+ */
+static char *get_usb_statmsg(int status)
+{
+ static char unkmsg[28];
+
+ switch (status) {
+ case 0:
+ return "success";
+ case -ENOENT:
+ return "unlinked (sync)";
+ case -EINPROGRESS:
+ return "URB still pending";
+ case -EPROTO:
+ return "bitstuff error, timeout, or unknown USB error";
+ case -EILSEQ:
+ return "CRC mismatch, timeout, or unknown USB error";
+ case -ETIME:
+ return "USB response timeout";
+ case -EPIPE:
+ return "endpoint stalled";
+ case -ECOMM:
+ return "IN buffer overrun";
+ case -ENOSR:
+ return "OUT buffer underrun";
+ case -EOVERFLOW:
+ return "endpoint babble";
+ case -EREMOTEIO:
+ return "short packet";
+ case -ENODEV:
+ return "device removed";
+ case -EXDEV:
+ return "partial isoc transfer";
+ case -EINVAL:
+ return "ISO madness";
+ case -ECONNRESET:
+ return "unlinked (async)";
+ case -ESHUTDOWN:
+ return "device shut down";
+ default:
+ snprintf(unkmsg, sizeof(unkmsg), "unknown status %d", status);
+ return unkmsg;
+ }
+}
+
+/* usb_pipetype_str
+ * retrieve string representation of USB pipe type
+ */
+static inline char *usb_pipetype_str(int pipe)
+{
+ if (usb_pipeisoc(pipe))
+ return "Isoc";
+ if (usb_pipeint(pipe))
+ return "Int";
+ if (usb_pipecontrol(pipe))
+ return "Ctrl";
+ if (usb_pipebulk(pipe))
+ return "Bulk";
+ return "?";
+}
+
+/* dump_urb
+ * write content of URB to syslog for debugging
+ */
+static inline void dump_urb(enum debuglevel level, const char *tag,
+ struct urb *urb)
+{
+#ifdef CONFIG_GIGASET_DEBUG
+ int i;
+ gig_dbg(level, "%s urb(0x%08lx)->{", tag, (unsigned long) urb);
+ if (urb) {
+ gig_dbg(level,
+ " dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, "
+ "hcpriv=0x%08lx, transfer_flags=0x%x,",
+ (unsigned long) urb->dev,
+ usb_pipetype_str(urb->pipe),
+ usb_pipeendpoint(urb->pipe), usb_pipedevice(urb->pipe),
+ usb_pipein(urb->pipe) ? "in" : "out",
+ (unsigned long) urb->hcpriv,
+ urb->transfer_flags);
+ gig_dbg(level,
+ " transfer_buffer=0x%08lx[%d], actual_length=%d, "
+ "setup_packet=0x%08lx,",
+ (unsigned long) urb->transfer_buffer,
+ urb->transfer_buffer_length, urb->actual_length,
+ (unsigned long) urb->setup_packet);
+ gig_dbg(level,
+ " start_frame=%d, number_of_packets=%d, interval=%d, "
+ "error_count=%d,",
+ urb->start_frame, urb->number_of_packets, urb->interval,
+ urb->error_count);
+ gig_dbg(level,
+ " context=0x%08lx, complete=0x%08lx, "
+ "iso_frame_desc[]={",
+ (unsigned long) urb->context,
+ (unsigned long) urb->complete);
+ for (i = 0; i < urb->number_of_packets; i++) {
+ struct usb_iso_packet_descriptor *pifd
+ = &urb->iso_frame_desc[i];
+ gig_dbg(level,
+ " {offset=%u, length=%u, actual_length=%u, "
+ "status=%u}",
+ pifd->offset, pifd->length, pifd->actual_length,
+ pifd->status);
+ }
+ }
+ gig_dbg(level, "}}");
+#endif
+}
+
+/* read/set modem control bits etc. (m10x only) */
+static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
+ unsigned new_state)
+{
+ return -EINVAL;
+}
+
+static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
+{
+ return -EINVAL;
+}
+
+static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
+{
+ return -EINVAL;
+}
+
+/* set/clear bits in base connection state, return previous state
+ */
+static inline int update_basstate(struct bas_cardstate *ucs,
+ int set, int clear)
+{
+ unsigned long flags;
+ int state;
+
+ spin_lock_irqsave(&ucs->lock, flags);
+ state = ucs->basstate;
+ ucs->basstate = (state & ~clear) | set;
+ spin_unlock_irqrestore(&ucs->lock, flags);
+ return state;
+}
+
+/* error_hangup
+ * hang up any existing connection because of an unrecoverable error
+ * This function may be called from any context and takes care of scheduling
+ * the necessary actions for execution outside of interrupt context.
+ * cs->lock must not be held.
+ * argument:
+ * B channel control structure
+ */
+static inline void error_hangup(struct bc_state *bcs)
+{
+ struct cardstate *cs = bcs->cs;
+
+ gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL);
+ gigaset_schedule_event(cs);
+}
+
+/* error_reset
+ * reset Gigaset device because of an unrecoverable error
+ * This function may be called from any context, and takes care of
+ * scheduling the necessary actions for execution outside of interrupt context.
+ * cs->hw.bas->lock must not be held.
+ * argument:
+ * controller state structure
+ */
+static inline void error_reset(struct cardstate *cs)
+{
+ /* reset interrupt pipe to recover (ignore errors) */
+ update_basstate(cs->hw.bas, BS_RESETTING, 0);
+ if (req_submit(cs->bcs, HD_RESET_INTERRUPT_PIPE, 0, BAS_TIMEOUT))
+ /* submission failed, escalate to USB port reset */
+ usb_queue_reset_device(cs->hw.bas->interface);
+}
+
+/* check_pending
+ * check for completion of pending control request
+ * parameter:
+ * ucs hardware specific controller state structure
+ */
+static void check_pending(struct bas_cardstate *ucs)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ucs->lock, flags);
+ switch (ucs->pending) {
+ case 0:
+ break;
+ case HD_OPEN_ATCHANNEL:
+ if (ucs->basstate & BS_ATOPEN)
+ ucs->pending = 0;
+ break;
+ case HD_OPEN_B1CHANNEL:
+ if (ucs->basstate & BS_B1OPEN)
+ ucs->pending = 0;
+ break;
+ case HD_OPEN_B2CHANNEL:
+ if (ucs->basstate & BS_B2OPEN)
+ ucs->pending = 0;
+ break;
+ case HD_CLOSE_ATCHANNEL:
+ if (!(ucs->basstate & BS_ATOPEN))
+ ucs->pending = 0;
+ break;
+ case HD_CLOSE_B1CHANNEL:
+ if (!(ucs->basstate & BS_B1OPEN))
+ ucs->pending = 0;
+ break;
+ case HD_CLOSE_B2CHANNEL:
+ if (!(ucs->basstate & BS_B2OPEN))
+ ucs->pending = 0;
+ break;
+ case HD_DEVICE_INIT_ACK: /* no reply expected */
+ ucs->pending = 0;
+ break;
+ case HD_RESET_INTERRUPT_PIPE:
+ if (!(ucs->basstate & BS_RESETTING))
+ ucs->pending = 0;
+ break;
+ /*
+ * HD_READ_ATMESSAGE and HD_WRITE_ATMESSAGE are handled separately
+ * and should never end up here
+ */
+ default:
+ dev_warn(&ucs->interface->dev,
+ "unknown pending request 0x%02x cleared\n",
+ ucs->pending);
+ ucs->pending = 0;
+ }
+
+ if (!ucs->pending)
+ del_timer(&ucs->timer_ctrl);
+
+ spin_unlock_irqrestore(&ucs->lock, flags);
+}
+
+/* cmd_in_timeout
+ * timeout routine for command input request
+ * argument:
+ * controller state structure
+ */
+static void cmd_in_timeout(struct timer_list *t)
+{
+ struct bas_cardstate *ucs = from_timer(ucs, t, timer_cmd_in);
+ struct cardstate *cs = ucs->cs;
+ int rc;
+
+ if (!ucs->rcvbuf_size) {
+ gig_dbg(DEBUG_USBREQ, "%s: no receive in progress", __func__);
+ return;
+ }
+
+ if (ucs->retry_cmd_in++ >= BAS_RETRY) {
+ dev_err(cs->dev,
+ "control read: timeout, giving up after %d tries\n",
+ ucs->retry_cmd_in);
+ kfree(ucs->rcvbuf);
+ ucs->rcvbuf = NULL;
+ ucs->rcvbuf_size = 0;
+ error_reset(cs);
+ return;
+ }
+
+ gig_dbg(DEBUG_USBREQ, "%s: timeout, retry %d",
+ __func__, ucs->retry_cmd_in);
+ rc = atread_submit(cs, BAS_TIMEOUT);
+ if (rc < 0) {
+ kfree(ucs->rcvbuf);
+ ucs->rcvbuf = NULL;
+ ucs->rcvbuf_size = 0;
+ if (rc != -ENODEV)
+ error_reset(cs);
+ }
+}
+
+/* read_ctrl_callback
+ * USB completion handler for control pipe input
+ * called by the USB subsystem in interrupt context
+ * parameter:
+ * urb USB request block
+ * urb->context = inbuf structure for controller state
+ */
+static void read_ctrl_callback(struct urb *urb)
+{
+ struct inbuf_t *inbuf = urb->context;
+ struct cardstate *cs = inbuf->cs;
+ struct bas_cardstate *ucs = cs->hw.bas;
+ int status = urb->status;
+ unsigned numbytes;
+ int rc;
+
+ update_basstate(ucs, 0, BS_ATRDPEND);
+ wake_up(&ucs->waitqueue);
+ del_timer(&ucs->timer_cmd_in);
+
+ switch (status) {
+ case 0: /* normal completion */
+ numbytes = urb->actual_length;
+ if (unlikely(numbytes != ucs->rcvbuf_size)) {
+ dev_warn(cs->dev,
+ "control read: received %d chars, expected %d\n",
+ numbytes, ucs->rcvbuf_size);
+ if (numbytes > ucs->rcvbuf_size)
+ numbytes = ucs->rcvbuf_size;
+ }
+
+ /* copy received bytes to inbuf, notify event layer */
+ if (gigaset_fill_inbuf(inbuf, ucs->rcvbuf, numbytes)) {
+ gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
+ gigaset_schedule_event(cs);
+ }
+ break;
+
+ case -ENOENT: /* cancelled */
+ case -ECONNRESET: /* cancelled (async) */
+ case -EINPROGRESS: /* pending */
+ case -ENODEV: /* device removed */
+ case -ESHUTDOWN: /* device shut down */
+ /* no further action necessary */
+ gig_dbg(DEBUG_USBREQ, "%s: %s",
+ __func__, get_usb_statmsg(status));
+ break;
+
+ default: /* other errors: retry */
+ if (ucs->retry_cmd_in++ < BAS_RETRY) {
+ gig_dbg(DEBUG_USBREQ, "%s: %s, retry %d", __func__,
+ get_usb_statmsg(status), ucs->retry_cmd_in);
+ rc = atread_submit(cs, BAS_TIMEOUT);
+ if (rc >= 0)
+ /* successfully resubmitted, skip freeing */
+ return;
+ if (rc == -ENODEV)
+ /* disconnect, no further action necessary */
+ break;
+ }
+ dev_err(cs->dev, "control read: %s, giving up after %d tries\n",
+ get_usb_statmsg(status), ucs->retry_cmd_in);
+ error_reset(cs);
+ }
+
+ /* read finished, free buffer */
+ kfree(ucs->rcvbuf);
+ ucs->rcvbuf = NULL;
+ ucs->rcvbuf_size = 0;
+}
+
+/* atread_submit
+ * submit an HD_READ_ATMESSAGE command URB and optionally start a timeout
+ * parameters:
+ * cs controller state structure
+ * timeout timeout in 1/10 sec., 0: none
+ * return value:
+ * 0 on success
+ * -EBUSY if another request is pending
+ * any URB submission error code
+ */
+static int atread_submit(struct cardstate *cs, int timeout)
+{
+ struct bas_cardstate *ucs = cs->hw.bas;
+ int basstate;
+ int ret;
+
+ gig_dbg(DEBUG_USBREQ, "-------> HD_READ_ATMESSAGE (%d)",
+ ucs->rcvbuf_size);
+
+ basstate = update_basstate(ucs, BS_ATRDPEND, 0);
+ if (basstate & BS_ATRDPEND) {
+ dev_err(cs->dev,
+ "could not submit HD_READ_ATMESSAGE: URB busy\n");
+ return -EBUSY;
+ }
+
+ if (basstate & BS_SUSPEND) {
+ dev_notice(cs->dev,
+ "HD_READ_ATMESSAGE not submitted, "
+ "suspend in progress\n");
+ update_basstate(ucs, 0, BS_ATRDPEND);
+ /* treat like disconnect */
+ return -ENODEV;
+ }
+
+ ucs->dr_cmd_in.bRequestType = IN_VENDOR_REQ;
+ ucs->dr_cmd_in.bRequest = HD_READ_ATMESSAGE;
+ ucs->dr_cmd_in.wValue = 0;
+ ucs->dr_cmd_in.wIndex = 0;
+ ucs->dr_cmd_in.wLength = cpu_to_le16(ucs->rcvbuf_size);
+ usb_fill_control_urb(ucs->urb_cmd_in, ucs->udev,
+ usb_rcvctrlpipe(ucs->udev, 0),
+ (unsigned char *) &ucs->dr_cmd_in,
+ ucs->rcvbuf, ucs->rcvbuf_size,
+ read_ctrl_callback, cs->inbuf);
+
+ ret = usb_submit_urb(ucs->urb_cmd_in, GFP_ATOMIC);
+ if (ret != 0) {
+ update_basstate(ucs, 0, BS_ATRDPEND);
+ dev_err(cs->dev, "could not submit HD_READ_ATMESSAGE: %s\n",
+ get_usb_rcmsg(ret));
+ return ret;
+ }
+
+ if (timeout > 0) {
+ gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout);
+ mod_timer(&ucs->timer_cmd_in, jiffies + timeout * HZ / 10);
+ }
+ return 0;
+}
+
+/* int_in_work
+ * workqueue routine to clear halt on interrupt in endpoint
+ */
+
+static void int_in_work(struct work_struct *work)
+{
+ struct bas_cardstate *ucs =
+ container_of(work, struct bas_cardstate, int_in_wq);
+ struct urb *urb = ucs->urb_int_in;
+ struct cardstate *cs = urb->context;
+ int rc;
+
+ /* clear halt condition */
+ rc = usb_clear_halt(ucs->udev, urb->pipe);
+ gig_dbg(DEBUG_USBREQ, "clear_halt: %s", get_usb_rcmsg(rc));
+ if (rc == 0)
+ /* success, resubmit interrupt read URB */
+ rc = usb_submit_urb(urb, GFP_ATOMIC);
+
+ switch (rc) {
+ case 0: /* success */
+ case -ENODEV: /* device gone */
+ case -EINVAL: /* URB already resubmitted, or terminal badness */
+ break;
+ default: /* failure: try to recover by resetting the device */
+ dev_err(cs->dev, "clear halt failed: %s\n", get_usb_rcmsg(rc));
+ rc = usb_lock_device_for_reset(ucs->udev, ucs->interface);
+ if (rc == 0) {
+ rc = usb_reset_device(ucs->udev);
+ usb_unlock_device(ucs->udev);
+ }
+ }
+ ucs->retry_int_in = 0;
+}
+
+/* int_in_resubmit
+ * timer routine for interrupt read delayed resubmit
+ * argument:
+ * controller state structure
+ */
+static void int_in_resubmit(struct timer_list *t)
+{
+ struct bas_cardstate *ucs = from_timer(ucs, t, timer_int_in);
+ struct cardstate *cs = ucs->cs;
+ int rc;
+
+ if (ucs->retry_int_in++ >= BAS_RETRY) {
+ dev_err(cs->dev, "interrupt read: giving up after %d tries\n",
+ ucs->retry_int_in);
+ usb_queue_reset_device(ucs->interface);
+ return;
+ }
+
+ gig_dbg(DEBUG_USBREQ, "%s: retry %d", __func__, ucs->retry_int_in);
+ rc = usb_submit_urb(ucs->urb_int_in, GFP_ATOMIC);
+ if (rc != 0 && rc != -ENODEV) {
+ dev_err(cs->dev, "could not resubmit interrupt URB: %s\n",
+ get_usb_rcmsg(rc));
+ usb_queue_reset_device(ucs->interface);
+ }
+}
+
+/* read_int_callback
+ * USB completion handler for interrupt pipe input
+ * called by the USB subsystem in interrupt context
+ * parameter:
+ * urb USB request block
+ * urb->context = controller state structure
+ */
+static void read_int_callback(struct urb *urb)
+{
+ struct cardstate *cs = urb->context;
+ struct bas_cardstate *ucs = cs->hw.bas;
+ struct bc_state *bcs;
+ int status = urb->status;
+ unsigned long flags;
+ int rc;
+ unsigned l;
+ int channel;
+
+ switch (status) {
+ case 0: /* success */
+ ucs->retry_int_in = 0;
+ break;
+ case -EPIPE: /* endpoint stalled */
+ schedule_work(&ucs->int_in_wq);
+ /* fall through */
+ case -ENOENT: /* cancelled */
+ case -ECONNRESET: /* cancelled (async) */
+ case -EINPROGRESS: /* pending */
+ case -ENODEV: /* device removed */
+ case -ESHUTDOWN: /* device shut down */
+ /* no further action necessary */
+ gig_dbg(DEBUG_USBREQ, "%s: %s",
+ __func__, get_usb_statmsg(status));
+ return;
+ case -EPROTO: /* protocol error or unplug */
+ case -EILSEQ:
+ case -ETIME:
+ /* resubmit after delay */
+ gig_dbg(DEBUG_USBREQ, "%s: %s",
+ __func__, get_usb_statmsg(status));
+ mod_timer(&ucs->timer_int_in, jiffies + HZ / 10);
+ return;
+ default: /* other errors: just resubmit */
+ dev_warn(cs->dev, "interrupt read: %s\n",
+ get_usb_statmsg(status));
+ goto resubmit;
+ }
+
+ /* drop incomplete packets even if the missing bytes wouldn't matter */
+ if (unlikely(urb->actual_length < IP_MSGSIZE)) {
+ dev_warn(cs->dev, "incomplete interrupt packet (%d bytes)\n",
+ urb->actual_length);
+ goto resubmit;
+ }
+
+ l = (unsigned) ucs->int_in_buf[1] +
+ (((unsigned) ucs->int_in_buf[2]) << 8);
+
+ gig_dbg(DEBUG_USBREQ, "<-------%d: 0x%02x (%u [0x%02x 0x%02x])",
+ urb->actual_length, (int)ucs->int_in_buf[0], l,
+ (int)ucs->int_in_buf[1], (int)ucs->int_in_buf[2]);
+
+ channel = 0;
+
+ switch (ucs->int_in_buf[0]) {
+ case HD_DEVICE_INIT_OK:
+ update_basstate(ucs, BS_INIT, 0);
+ break;
+
+ case HD_READY_SEND_ATDATA:
+ del_timer(&ucs->timer_atrdy);
+ update_basstate(ucs, BS_ATREADY, BS_ATTIMER);
+ start_cbsend(cs);
+ break;
+
+ case HD_OPEN_B2CHANNEL_ACK:
+ ++channel;
+ /* fall through */
+ case HD_OPEN_B1CHANNEL_ACK:
+ bcs = cs->bcs + channel;
+ update_basstate(ucs, BS_B1OPEN << channel, 0);
+ gigaset_bchannel_up(bcs);
+ break;
+
+ case HD_OPEN_ATCHANNEL_ACK:
+ update_basstate(ucs, BS_ATOPEN, 0);
+ start_cbsend(cs);
+ break;
+
+ case HD_CLOSE_B2CHANNEL_ACK:
+ ++channel;
+ /* fall through */
+ case HD_CLOSE_B1CHANNEL_ACK:
+ bcs = cs->bcs + channel;
+ update_basstate(ucs, 0, BS_B1OPEN << channel);
+ stopurbs(bcs->hw.bas);
+ gigaset_bchannel_down(bcs);
+ break;
+
+ case HD_CLOSE_ATCHANNEL_ACK:
+ update_basstate(ucs, 0, BS_ATOPEN);
+ break;
+
+ case HD_B2_FLOW_CONTROL:
+ ++channel;
+ /* fall through */
+ case HD_B1_FLOW_CONTROL:
+ bcs = cs->bcs + channel;
+ atomic_add((l - BAS_NORMFRAME) * BAS_CORRFRAMES,
+ &bcs->hw.bas->corrbytes);
+ gig_dbg(DEBUG_ISO,
+ "Flow control (channel %d, sub %d): 0x%02x => %d",
+ channel, bcs->hw.bas->numsub, l,
+ atomic_read(&bcs->hw.bas->corrbytes));
+ break;
+
+ case HD_RECEIVEATDATA_ACK: /* AT response ready to be received */
+ if (!l) {
+ dev_warn(cs->dev,
+ "HD_RECEIVEATDATA_ACK with length 0 ignored\n");
+ break;
+ }
+ spin_lock_irqsave(&cs->lock, flags);
+ if (ucs->basstate & BS_ATRDPEND) {
+ spin_unlock_irqrestore(&cs->lock, flags);
+ dev_warn(cs->dev,
+ "HD_RECEIVEATDATA_ACK(%d) during HD_READ_ATMESSAGE(%d) ignored\n",
+ l, ucs->rcvbuf_size);
+ break;
+ }
+ if (ucs->rcvbuf_size) {
+ /* throw away previous buffer - we have no queue */
+ dev_err(cs->dev,
+ "receive AT data overrun, %d bytes lost\n",
+ ucs->rcvbuf_size);
+ kfree(ucs->rcvbuf);
+ ucs->rcvbuf_size = 0;
+ }
+ ucs->rcvbuf = kmalloc(l, GFP_ATOMIC);
+ if (ucs->rcvbuf == NULL) {
+ spin_unlock_irqrestore(&cs->lock, flags);
+ dev_err(cs->dev, "out of memory receiving AT data\n");
+ break;
+ }
+ ucs->rcvbuf_size = l;
+ ucs->retry_cmd_in = 0;
+ rc = atread_submit(cs, BAS_TIMEOUT);
+ if (rc < 0) {
+ kfree(ucs->rcvbuf);
+ ucs->rcvbuf = NULL;
+ ucs->rcvbuf_size = 0;
+ }
+ spin_unlock_irqrestore(&cs->lock, flags);
+ if (rc < 0 && rc != -ENODEV)
+ error_reset(cs);
+ break;
+
+ case HD_RESET_INTERRUPT_PIPE_ACK:
+ update_basstate(ucs, 0, BS_RESETTING);
+ dev_notice(cs->dev, "interrupt pipe reset\n");
+ break;
+
+ case HD_SUSPEND_END:
+ gig_dbg(DEBUG_USBREQ, "HD_SUSPEND_END");
+ break;
+
+ default:
+ dev_warn(cs->dev,
+ "unknown Gigaset signal 0x%02x (%u) ignored\n",
+ (int) ucs->int_in_buf[0], l);
+ }
+
+ check_pending(ucs);
+ wake_up(&ucs->waitqueue);
+
+resubmit:
+ rc = usb_submit_urb(urb, GFP_ATOMIC);
+ if (unlikely(rc != 0 && rc != -ENODEV)) {
+ dev_err(cs->dev, "could not resubmit interrupt URB: %s\n",
+ get_usb_rcmsg(rc));
+ error_reset(cs);
+ }
+}
+
+/* read_iso_callback
+ * USB completion handler for B channel isochronous input
+ * called by the USB subsystem in interrupt context
+ * parameter:
+ * urb USB request block of completed request
+ * urb->context = bc_state structure
+ */
+static void read_iso_callback(struct urb *urb)
+{
+ struct bc_state *bcs;
+ struct bas_bc_state *ubc;
+ int status = urb->status;
+ unsigned long flags;
+ int i, rc;
+
+ /* status codes not worth bothering the tasklet with */
+ if (unlikely(status == -ENOENT ||
+ status == -ECONNRESET ||
+ status == -EINPROGRESS ||
+ status == -ENODEV ||
+ status == -ESHUTDOWN)) {
+ gig_dbg(DEBUG_ISO, "%s: %s",
+ __func__, get_usb_statmsg(status));
+ return;
+ }
+
+ bcs = urb->context;
+ ubc = bcs->hw.bas;
+
+ spin_lock_irqsave(&ubc->isoinlock, flags);
+ if (likely(ubc->isoindone == NULL)) {
+ /* pass URB to tasklet */
+ ubc->isoindone = urb;
+ ubc->isoinstatus = status;
+ tasklet_hi_schedule(&ubc->rcvd_tasklet);
+ } else {
+ /* tasklet still busy, drop data and resubmit URB */
+ gig_dbg(DEBUG_ISO, "%s: overrun", __func__);
+ ubc->loststatus = status;
+ for (i = 0; i < BAS_NUMFRAMES; i++) {
+ ubc->isoinlost += urb->iso_frame_desc[i].actual_length;
+ if (unlikely(urb->iso_frame_desc[i].status != 0 &&
+ urb->iso_frame_desc[i].status != -EINPROGRESS))
+ ubc->loststatus = urb->iso_frame_desc[i].status;
+ urb->iso_frame_desc[i].status = 0;
+ urb->iso_frame_desc[i].actual_length = 0;
+ }
+ if (likely(ubc->running)) {
+ /* urb->dev is clobbered by USB subsystem */
+ urb->dev = bcs->cs->hw.bas->udev;
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->number_of_packets = BAS_NUMFRAMES;
+ rc = usb_submit_urb(urb, GFP_ATOMIC);
+ if (unlikely(rc != 0 && rc != -ENODEV)) {
+ dev_err(bcs->cs->dev,
+ "could not resubmit isoc read URB: %s\n",
+ get_usb_rcmsg(rc));
+ dump_urb(DEBUG_ISO, "isoc read", urb);
+ error_hangup(bcs);
+ }
+ }
+ }
+ spin_unlock_irqrestore(&ubc->isoinlock, flags);
+}
+
+/* write_iso_callback
+ * USB completion handler for B channel isochronous output
+ * called by the USB subsystem in interrupt context
+ * parameter:
+ * urb USB request block of completed request
+ * urb->context = isow_urbctx_t structure
+ */
+static void write_iso_callback(struct urb *urb)
+{
+ struct isow_urbctx_t *ucx;
+ struct bas_bc_state *ubc;
+ int status = urb->status;
+ unsigned long flags;
+
+ /* status codes not worth bothering the tasklet with */
+ if (unlikely(status == -ENOENT ||
+ status == -ECONNRESET ||
+ status == -EINPROGRESS ||
+ status == -ENODEV ||
+ status == -ESHUTDOWN)) {
+ gig_dbg(DEBUG_ISO, "%s: %s",
+ __func__, get_usb_statmsg(status));
+ return;
+ }
+
+ /* pass URB context to tasklet */
+ ucx = urb->context;
+ ubc = ucx->bcs->hw.bas;
+ ucx->status = status;
+
+ spin_lock_irqsave(&ubc->isooutlock, flags);
+ ubc->isooutovfl = ubc->isooutdone;
+ ubc->isooutdone = ucx;
+ spin_unlock_irqrestore(&ubc->isooutlock, flags);
+ tasklet_hi_schedule(&ubc->sent_tasklet);
+}
+
+/* starturbs
+ * prepare and submit USB request blocks for isochronous input and output
+ * argument:
+ * B channel control structure
+ * return value:
+ * 0 on success
+ * < 0 on error (no URBs submitted)
+ */
+static int starturbs(struct bc_state *bcs)
+{
+ struct usb_device *udev = bcs->cs->hw.bas->udev;
+ struct bas_bc_state *ubc = bcs->hw.bas;
+ struct urb *urb;
+ int j, k;
+ int rc;
+
+ /* initialize L2 reception */
+ if (bcs->proto2 == L2_HDLC)
+ bcs->inputstate |= INS_flag_hunt;
+
+ /* submit all isochronous input URBs */
+ ubc->running = 1;
+ for (k = 0; k < BAS_INURBS; k++) {
+ urb = ubc->isoinurbs[k];
+ if (!urb) {
+ rc = -EFAULT;
+ goto error;
+ }
+ usb_fill_int_urb(urb, udev,
+ usb_rcvisocpipe(udev, 3 + 2 * bcs->channel),
+ ubc->isoinbuf + k * BAS_INBUFSIZE,
+ BAS_INBUFSIZE, read_iso_callback, bcs,
+ BAS_FRAMETIME);
+
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->number_of_packets = BAS_NUMFRAMES;
+ for (j = 0; j < BAS_NUMFRAMES; j++) {
+ urb->iso_frame_desc[j].offset = j * BAS_MAXFRAME;
+ urb->iso_frame_desc[j].length = BAS_MAXFRAME;
+ urb->iso_frame_desc[j].status = 0;
+ urb->iso_frame_desc[j].actual_length = 0;
+ }
+
+ dump_urb(DEBUG_ISO, "Initial isoc read", urb);
+ rc = usb_submit_urb(urb, GFP_ATOMIC);
+ if (rc != 0)
+ goto error;
+ }
+
+ /* initialize L2 transmission */
+ gigaset_isowbuf_init(ubc->isooutbuf, PPP_FLAG);
+
+ /* set up isochronous output URBs for flag idling */
+ for (k = 0; k < BAS_OUTURBS; ++k) {
+ urb = ubc->isoouturbs[k].urb;
+ if (!urb) {
+ rc = -EFAULT;
+ goto error;
+ }
+ usb_fill_int_urb(urb, udev,
+ usb_sndisocpipe(udev, 4 + 2 * bcs->channel),
+ ubc->isooutbuf->data,
+ sizeof(ubc->isooutbuf->data),
+ write_iso_callback, &ubc->isoouturbs[k],
+ BAS_FRAMETIME);
+
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->number_of_packets = BAS_NUMFRAMES;
+ for (j = 0; j < BAS_NUMFRAMES; ++j) {
+ urb->iso_frame_desc[j].offset = BAS_OUTBUFSIZE;
+ urb->iso_frame_desc[j].length = BAS_NORMFRAME;
+ urb->iso_frame_desc[j].status = 0;
+ urb->iso_frame_desc[j].actual_length = 0;
+ }
+ ubc->isoouturbs[k].limit = -1;
+ }
+
+ /* keep one URB free, submit the others */
+ for (k = 0; k < BAS_OUTURBS - 1; ++k) {
+ dump_urb(DEBUG_ISO, "Initial isoc write", urb);
+ rc = usb_submit_urb(ubc->isoouturbs[k].urb, GFP_ATOMIC);
+ if (rc != 0)
+ goto error;
+ }
+ dump_urb(DEBUG_ISO, "Initial isoc write (free)", urb);
+ ubc->isooutfree = &ubc->isoouturbs[BAS_OUTURBS - 1];
+ ubc->isooutdone = ubc->isooutovfl = NULL;
+ return 0;
+error:
+ stopurbs(ubc);
+ return rc;
+}
+
+/* stopurbs
+ * cancel the USB request blocks for isochronous input and output
+ * errors are silently ignored
+ * argument:
+ * B channel control structure
+ */
+static void stopurbs(struct bas_bc_state *ubc)
+{
+ int k, rc;
+
+ ubc->running = 0;
+
+ for (k = 0; k < BAS_INURBS; ++k) {
+ rc = usb_unlink_urb(ubc->isoinurbs[k]);
+ gig_dbg(DEBUG_ISO,
+ "%s: isoc input URB %d unlinked, result = %s",
+ __func__, k, get_usb_rcmsg(rc));
+ }
+
+ for (k = 0; k < BAS_OUTURBS; ++k) {
+ rc = usb_unlink_urb(ubc->isoouturbs[k].urb);
+ gig_dbg(DEBUG_ISO,
+ "%s: isoc output URB %d unlinked, result = %s",
+ __func__, k, get_usb_rcmsg(rc));
+ }
+}
+
+/* Isochronous Write - Bottom Half */
+/* =============================== */
+
+/* submit_iso_write_urb
+ * fill and submit the next isochronous write URB
+ * parameters:
+ * ucx context structure containing URB
+ * return value:
+ * number of frames submitted in URB
+ * 0 if URB not submitted because no data available (isooutbuf busy)
+ * error code < 0 on error
+ */
+static int submit_iso_write_urb(struct isow_urbctx_t *ucx)
+{
+ struct urb *urb = ucx->urb;
+ struct bas_bc_state *ubc = ucx->bcs->hw.bas;
+ struct usb_iso_packet_descriptor *ifd;
+ int corrbytes, nframe, rc;
+
+ /* urb->dev is clobbered by USB subsystem */
+ urb->dev = ucx->bcs->cs->hw.bas->udev;
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->transfer_buffer = ubc->isooutbuf->data;
+ urb->transfer_buffer_length = sizeof(ubc->isooutbuf->data);
+
+ for (nframe = 0; nframe < BAS_NUMFRAMES; nframe++) {
+ ifd = &urb->iso_frame_desc[nframe];
+
+ /* compute frame length according to flow control */
+ ifd->length = BAS_NORMFRAME;
+ corrbytes = atomic_read(&ubc->corrbytes);
+ if (corrbytes != 0) {
+ gig_dbg(DEBUG_ISO, "%s: corrbytes=%d",
+ __func__, corrbytes);
+ if (corrbytes > BAS_HIGHFRAME - BAS_NORMFRAME)
+ corrbytes = BAS_HIGHFRAME - BAS_NORMFRAME;
+ else if (corrbytes < BAS_LOWFRAME - BAS_NORMFRAME)
+ corrbytes = BAS_LOWFRAME - BAS_NORMFRAME;
+ ifd->length += corrbytes;
+ atomic_add(-corrbytes, &ubc->corrbytes);
+ }
+
+ /* retrieve block of data to send */
+ rc = gigaset_isowbuf_getbytes(ubc->isooutbuf, ifd->length);
+ if (rc < 0) {
+ if (rc == -EBUSY) {
+ gig_dbg(DEBUG_ISO,
+ "%s: buffer busy at frame %d",
+ __func__, nframe);
+ /* tasklet will be restarted from
+ gigaset_isoc_send_skb() */
+ } else {
+ dev_err(ucx->bcs->cs->dev,
+ "%s: buffer error %d at frame %d\n",
+ __func__, rc, nframe);
+ return rc;
+ }
+ break;
+ }
+ ifd->offset = rc;
+ ucx->limit = ubc->isooutbuf->nextread;
+ ifd->status = 0;
+ ifd->actual_length = 0;
+ }
+ if (unlikely(nframe == 0))
+ return 0; /* no data to send */
+ urb->number_of_packets = nframe;
+
+ rc = usb_submit_urb(urb, GFP_ATOMIC);
+ if (unlikely(rc)) {
+ if (rc == -ENODEV)
+ /* device removed - give up silently */
+ gig_dbg(DEBUG_ISO, "%s: disconnected", __func__);
+ else
+ dev_err(ucx->bcs->cs->dev,
+ "could not submit isoc write URB: %s\n",
+ get_usb_rcmsg(rc));
+ return rc;
+ }
+ ++ubc->numsub;
+ return nframe;
+}
+
+/* write_iso_tasklet
+ * tasklet scheduled when an isochronous output URB from the Gigaset device
+ * has completed
+ * parameter:
+ * data B channel state structure
+ */
+static void write_iso_tasklet(unsigned long data)
+{
+ struct bc_state *bcs = (struct bc_state *) data;
+ struct bas_bc_state *ubc = bcs->hw.bas;
+ struct cardstate *cs = bcs->cs;
+ struct isow_urbctx_t *done, *next, *ovfl;
+ struct urb *urb;
+ int status;
+ struct usb_iso_packet_descriptor *ifd;
+ unsigned long flags;
+ int i;
+ struct sk_buff *skb;
+ int len;
+ int rc;
+
+ /* loop while completed URBs arrive in time */
+ for (;;) {
+ if (unlikely(!(ubc->running))) {
+ gig_dbg(DEBUG_ISO, "%s: not running", __func__);
+ return;
+ }
+
+ /* retrieve completed URBs */
+ spin_lock_irqsave(&ubc->isooutlock, flags);
+ done = ubc->isooutdone;
+ ubc->isooutdone = NULL;
+ ovfl = ubc->isooutovfl;
+ ubc->isooutovfl = NULL;
+ spin_unlock_irqrestore(&ubc->isooutlock, flags);
+ if (ovfl) {
+ dev_err(cs->dev, "isoc write underrun\n");
+ error_hangup(bcs);
+ break;
+ }
+ if (!done)
+ break;
+
+ /* submit free URB if available */
+ spin_lock_irqsave(&ubc->isooutlock, flags);
+ next = ubc->isooutfree;
+ ubc->isooutfree = NULL;
+ spin_unlock_irqrestore(&ubc->isooutlock, flags);
+ if (next) {
+ rc = submit_iso_write_urb(next);
+ if (unlikely(rc <= 0 && rc != -ENODEV)) {
+ /* could not submit URB, put it back */
+ spin_lock_irqsave(&ubc->isooutlock, flags);
+ if (ubc->isooutfree == NULL) {
+ ubc->isooutfree = next;
+ next = NULL;
+ }
+ spin_unlock_irqrestore(&ubc->isooutlock, flags);
+ if (next) {
+ /* couldn't put it back */
+ dev_err(cs->dev,
+ "losing isoc write URB\n");
+ error_hangup(bcs);
+ }
+ }
+ }
+
+ /* process completed URB */
+ urb = done->urb;
+ status = done->status;
+ switch (status) {
+ case -EXDEV: /* partial completion */
+ gig_dbg(DEBUG_ISO, "%s: URB partially completed",
+ __func__);
+ /* fall through - what's the difference anyway? */
+ case 0: /* normal completion */
+ /* inspect individual frames
+ * assumptions (for lack of documentation):
+ * - actual_length bytes of first frame in error are
+ * successfully sent
+ * - all following frames are not sent at all
+ */
+ for (i = 0; i < BAS_NUMFRAMES; i++) {
+ ifd = &urb->iso_frame_desc[i];
+ if (ifd->status ||
+ ifd->actual_length != ifd->length) {
+ dev_warn(cs->dev,
+ "isoc write: frame %d[%d/%d]: %s\n",
+ i, ifd->actual_length,
+ ifd->length,
+ get_usb_statmsg(ifd->status));
+ break;
+ }
+ }
+ break;
+ case -EPIPE: /* stall - probably underrun */
+ dev_err(cs->dev, "isoc write: stalled\n");
+ error_hangup(bcs);
+ break;
+ default: /* other errors */
+ dev_warn(cs->dev, "isoc write: %s\n",
+ get_usb_statmsg(status));
+ }
+
+ /* mark the write buffer area covered by this URB as free */
+ if (done->limit >= 0)
+ ubc->isooutbuf->read = done->limit;
+
+ /* mark URB as free */
+ spin_lock_irqsave(&ubc->isooutlock, flags);
+ next = ubc->isooutfree;
+ ubc->isooutfree = done;
+ spin_unlock_irqrestore(&ubc->isooutlock, flags);
+ if (next) {
+ /* only one URB still active - resubmit one */
+ rc = submit_iso_write_urb(next);
+ if (unlikely(rc <= 0 && rc != -ENODEV)) {
+ /* couldn't submit */
+ error_hangup(bcs);
+ }
+ }
+ }
+
+ /* process queued SKBs */
+ while ((skb = skb_dequeue(&bcs->squeue))) {
+ /* copy to output buffer, doing L2 encapsulation */
+ len = skb->len;
+ if (gigaset_isoc_buildframe(bcs, skb->data, len) == -EAGAIN) {
+ /* insufficient buffer space, push back onto queue */
+ skb_queue_head(&bcs->squeue, skb);
+ gig_dbg(DEBUG_ISO, "%s: skb requeued, qlen=%d",
+ __func__, skb_queue_len(&bcs->squeue));
+ break;
+ }
+ skb_pull(skb, len);
+ gigaset_skb_sent(bcs, skb);
+ dev_kfree_skb_any(skb);
+ }
+}
+
+/* Isochronous Read - Bottom Half */
+/* ============================== */
+
+/* read_iso_tasklet
+ * tasklet scheduled when an isochronous input URB from the Gigaset device
+ * has completed
+ * parameter:
+ * data B channel state structure
+ */
+static void read_iso_tasklet(unsigned long data)
+{
+ struct bc_state *bcs = (struct bc_state *) data;
+ struct bas_bc_state *ubc = bcs->hw.bas;
+ struct cardstate *cs = bcs->cs;
+ struct urb *urb;
+ int status;
+ struct usb_iso_packet_descriptor *ifd;
+ char *rcvbuf;
+ unsigned long flags;
+ int totleft, numbytes, offset, frame, rc;
+
+ /* loop while more completed URBs arrive in the meantime */
+ for (;;) {
+ /* retrieve URB */
+ spin_lock_irqsave(&ubc->isoinlock, flags);
+ urb = ubc->isoindone;
+ if (!urb) {
+ spin_unlock_irqrestore(&ubc->isoinlock, flags);
+ return;
+ }
+ status = ubc->isoinstatus;
+ ubc->isoindone = NULL;
+ if (unlikely(ubc->loststatus != -EINPROGRESS)) {
+ dev_warn(cs->dev,
+ "isoc read overrun, URB dropped (status: %s, %d bytes)\n",
+ get_usb_statmsg(ubc->loststatus),
+ ubc->isoinlost);
+ ubc->loststatus = -EINPROGRESS;
+ }
+ spin_unlock_irqrestore(&ubc->isoinlock, flags);
+
+ if (unlikely(!(ubc->running))) {
+ gig_dbg(DEBUG_ISO,
+ "%s: channel not running, "
+ "dropped URB with status: %s",
+ __func__, get_usb_statmsg(status));
+ return;
+ }
+
+ switch (status) {
+ case 0: /* normal completion */
+ break;
+ case -EXDEV: /* inspect individual frames
+ (we do that anyway) */
+ gig_dbg(DEBUG_ISO, "%s: URB partially completed",
+ __func__);
+ break;
+ case -ENOENT:
+ case -ECONNRESET:
+ case -EINPROGRESS:
+ gig_dbg(DEBUG_ISO, "%s: %s",
+ __func__, get_usb_statmsg(status));
+ continue; /* -> skip */
+ case -EPIPE:
+ dev_err(cs->dev, "isoc read: stalled\n");
+ error_hangup(bcs);
+ continue; /* -> skip */
+ default: /* other error */
+ dev_warn(cs->dev, "isoc read: %s\n",
+ get_usb_statmsg(status));
+ goto error;
+ }
+
+ rcvbuf = urb->transfer_buffer;
+ totleft = urb->actual_length;
+ for (frame = 0; totleft > 0 && frame < BAS_NUMFRAMES; frame++) {
+ ifd = &urb->iso_frame_desc[frame];
+ numbytes = ifd->actual_length;
+ switch (ifd->status) {
+ case 0: /* success */
+ break;
+ case -EPROTO: /* protocol error or unplug */
+ case -EILSEQ:
+ case -ETIME:
+ /* probably just disconnected, ignore */
+ gig_dbg(DEBUG_ISO,
+ "isoc read: frame %d[%d]: %s\n",
+ frame, numbytes,
+ get_usb_statmsg(ifd->status));
+ break;
+ default: /* other error */
+ /* report, assume transferred bytes are ok */
+ dev_warn(cs->dev,
+ "isoc read: frame %d[%d]: %s\n",
+ frame, numbytes,
+ get_usb_statmsg(ifd->status));
+ }
+ if (unlikely(numbytes > BAS_MAXFRAME))
+ dev_warn(cs->dev,
+ "isoc read: frame %d[%d]: %s\n",
+ frame, numbytes,
+ "exceeds max frame size");
+ if (unlikely(numbytes > totleft)) {
+ dev_warn(cs->dev,
+ "isoc read: frame %d[%d]: %s\n",
+ frame, numbytes,
+ "exceeds total transfer length");
+ numbytes = totleft;
+ }
+ offset = ifd->offset;
+ if (unlikely(offset + numbytes > BAS_INBUFSIZE)) {
+ dev_warn(cs->dev,
+ "isoc read: frame %d[%d]: %s\n",
+ frame, numbytes,
+ "exceeds end of buffer");
+ numbytes = BAS_INBUFSIZE - offset;
+ }
+ gigaset_isoc_receive(rcvbuf + offset, numbytes, bcs);
+ totleft -= numbytes;
+ }
+ if (unlikely(totleft > 0))
+ dev_warn(cs->dev, "isoc read: %d data bytes missing\n",
+ totleft);
+
+error:
+ /* URB processed, resubmit */
+ for (frame = 0; frame < BAS_NUMFRAMES; frame++) {
+ urb->iso_frame_desc[frame].status = 0;
+ urb->iso_frame_desc[frame].actual_length = 0;
+ }
+ /* urb->dev is clobbered by USB subsystem */
+ urb->dev = bcs->cs->hw.bas->udev;
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->number_of_packets = BAS_NUMFRAMES;
+ rc = usb_submit_urb(urb, GFP_ATOMIC);
+ if (unlikely(rc != 0 && rc != -ENODEV)) {
+ dev_err(cs->dev,
+ "could not resubmit isoc read URB: %s\n",
+ get_usb_rcmsg(rc));
+ dump_urb(DEBUG_ISO, "resubmit isoc read", urb);
+ error_hangup(bcs);
+ }
+ }
+}
+
+/* Channel Operations */
+/* ================== */
+
+/* req_timeout
+ * timeout routine for control output request
+ * argument:
+ * controller state structure
+ */
+static void req_timeout(struct timer_list *t)
+{
+ struct bas_cardstate *ucs = from_timer(ucs, t, timer_ctrl);
+ struct cardstate *cs = ucs->cs;
+ int pending;
+ unsigned long flags;
+
+ check_pending(ucs);
+
+ spin_lock_irqsave(&ucs->lock, flags);
+ pending = ucs->pending;
+ ucs->pending = 0;
+ spin_unlock_irqrestore(&ucs->lock, flags);
+
+ switch (pending) {
+ case 0: /* no pending request */
+ gig_dbg(DEBUG_USBREQ, "%s: no request pending", __func__);
+ break;
+
+ case HD_OPEN_ATCHANNEL:
+ dev_err(cs->dev, "timeout opening AT channel\n");
+ error_reset(cs);
+ break;
+
+ case HD_OPEN_B1CHANNEL:
+ dev_err(cs->dev, "timeout opening channel 1\n");
+ error_hangup(&cs->bcs[0]);
+ break;
+
+ case HD_OPEN_B2CHANNEL:
+ dev_err(cs->dev, "timeout opening channel 2\n");
+ error_hangup(&cs->bcs[1]);
+ break;
+
+ case HD_CLOSE_ATCHANNEL:
+ dev_err(cs->dev, "timeout closing AT channel\n");
+ error_reset(cs);
+ break;
+
+ case HD_CLOSE_B1CHANNEL:
+ dev_err(cs->dev, "timeout closing channel 1\n");
+ error_reset(cs);
+ break;
+
+ case HD_CLOSE_B2CHANNEL:
+ dev_err(cs->dev, "timeout closing channel 2\n");
+ error_reset(cs);
+ break;
+
+ case HD_RESET_INTERRUPT_PIPE:
+ /* error recovery escalation */
+ dev_err(cs->dev,
+ "reset interrupt pipe timeout, attempting USB reset\n");
+ usb_queue_reset_device(ucs->interface);
+ break;
+
+ default:
+ dev_warn(cs->dev, "request 0x%02x timed out, clearing\n",
+ pending);
+ }
+
+ wake_up(&ucs->waitqueue);
+}
+
+/* write_ctrl_callback
+ * USB completion handler for control pipe output
+ * called by the USB subsystem in interrupt context
+ * parameter:
+ * urb USB request block of completed request
+ * urb->context = hardware specific controller state structure
+ */
+static void write_ctrl_callback(struct urb *urb)
+{
+ struct bas_cardstate *ucs = urb->context;
+ int status = urb->status;
+ int rc;
+ unsigned long flags;
+
+ /* check status */
+ switch (status) {
+ case 0: /* normal completion */
+ spin_lock_irqsave(&ucs->lock, flags);
+ switch (ucs->pending) {
+ case HD_DEVICE_INIT_ACK: /* no reply expected */
+ del_timer(&ucs->timer_ctrl);
+ ucs->pending = 0;
+ break;
+ }
+ spin_unlock_irqrestore(&ucs->lock, flags);
+ return;
+
+ case -ENOENT: /* cancelled */
+ case -ECONNRESET: /* cancelled (async) */
+ case -EINPROGRESS: /* pending */
+ case -ENODEV: /* device removed */
+ case -ESHUTDOWN: /* device shut down */
+ /* ignore silently */
+ gig_dbg(DEBUG_USBREQ, "%s: %s",
+ __func__, get_usb_statmsg(status));
+ break;
+
+ default: /* any failure */
+ /* don't retry if suspend requested */
+ if (++ucs->retry_ctrl > BAS_RETRY ||
+ (ucs->basstate & BS_SUSPEND)) {
+ dev_err(&ucs->interface->dev,
+ "control request 0x%02x failed: %s\n",
+ ucs->dr_ctrl.bRequest,
+ get_usb_statmsg(status));
+ break; /* give up */
+ }
+ dev_notice(&ucs->interface->dev,
+ "control request 0x%02x: %s, retry %d\n",
+ ucs->dr_ctrl.bRequest, get_usb_statmsg(status),
+ ucs->retry_ctrl);
+ /* urb->dev is clobbered by USB subsystem */
+ urb->dev = ucs->udev;
+ rc = usb_submit_urb(urb, GFP_ATOMIC);
+ if (unlikely(rc)) {
+ dev_err(&ucs->interface->dev,
+ "could not resubmit request 0x%02x: %s\n",
+ ucs->dr_ctrl.bRequest, get_usb_rcmsg(rc));
+ break;
+ }
+ /* resubmitted */
+ return;
+ }
+
+ /* failed, clear pending request */
+ spin_lock_irqsave(&ucs->lock, flags);
+ del_timer(&ucs->timer_ctrl);
+ ucs->pending = 0;
+ spin_unlock_irqrestore(&ucs->lock, flags);
+ wake_up(&ucs->waitqueue);
+}
+
+/* req_submit
+ * submit a control output request without message buffer to the Gigaset base
+ * and optionally start a timeout
+ * parameters:
+ * bcs B channel control structure
+ * req control request code (HD_*)
+ * val control request parameter value (set to 0 if unused)
+ * timeout timeout in seconds (0: no timeout)
+ * return value:
+ * 0 on success
+ * -EBUSY if another request is pending
+ * any URB submission error code
+ */
+static int req_submit(struct bc_state *bcs, int req, int val, int timeout)
+{
+ struct bas_cardstate *ucs = bcs->cs->hw.bas;
+ int ret;
+ unsigned long flags;
+
+ gig_dbg(DEBUG_USBREQ, "-------> 0x%02x (%d)", req, val);
+
+ spin_lock_irqsave(&ucs->lock, flags);
+ if (ucs->pending) {
+ spin_unlock_irqrestore(&ucs->lock, flags);
+ dev_err(bcs->cs->dev,
+ "submission of request 0x%02x failed: "
+ "request 0x%02x still pending\n",
+ req, ucs->pending);
+ return -EBUSY;
+ }
+
+ ucs->dr_ctrl.bRequestType = OUT_VENDOR_REQ;
+ ucs->dr_ctrl.bRequest = req;
+ ucs->dr_ctrl.wValue = cpu_to_le16(val);
+ ucs->dr_ctrl.wIndex = 0;
+ ucs->dr_ctrl.wLength = 0;
+ usb_fill_control_urb(ucs->urb_ctrl, ucs->udev,
+ usb_sndctrlpipe(ucs->udev, 0),
+ (unsigned char *) &ucs->dr_ctrl, NULL, 0,
+ write_ctrl_callback, ucs);
+ ucs->retry_ctrl = 0;
+ ret = usb_submit_urb(ucs->urb_ctrl, GFP_ATOMIC);
+ if (unlikely(ret)) {
+ dev_err(bcs->cs->dev, "could not submit request 0x%02x: %s\n",
+ req, get_usb_rcmsg(ret));
+ spin_unlock_irqrestore(&ucs->lock, flags);
+ return ret;
+ }
+ ucs->pending = req;
+
+ if (timeout > 0) {
+ gig_dbg(DEBUG_USBREQ, "setting timeout of %d/10 secs", timeout);
+ mod_timer(&ucs->timer_ctrl, jiffies + timeout * HZ / 10);
+ }
+
+ spin_unlock_irqrestore(&ucs->lock, flags);
+ return 0;
+}
+
+/* gigaset_init_bchannel
+ * called by common.c to connect a B channel
+ * initialize isochronous I/O and tell the Gigaset base to open the channel
+ * argument:
+ * B channel control structure
+ * return value:
+ * 0 on success, error code < 0 on error
+ */
+static int gigaset_init_bchannel(struct bc_state *bcs)
+{
+ struct cardstate *cs = bcs->cs;
+ int req, ret;
+ unsigned long flags;
+
+ spin_lock_irqsave(&cs->lock, flags);
+ if (unlikely(!cs->connected)) {
+ gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__);
+ spin_unlock_irqrestore(&cs->lock, flags);
+ return -ENODEV;
+ }
+
+ if (cs->hw.bas->basstate & BS_SUSPEND) {
+ dev_notice(cs->dev,
+ "not starting isoc I/O, suspend in progress\n");
+ spin_unlock_irqrestore(&cs->lock, flags);
+ return -EHOSTUNREACH;
+ }
+
+ ret = starturbs(bcs);
+ if (ret < 0) {
+ spin_unlock_irqrestore(&cs->lock, flags);
+ dev_err(cs->dev,
+ "could not start isoc I/O for channel B%d: %s\n",
+ bcs->channel + 1,
+ ret == -EFAULT ? "null URB" : get_usb_rcmsg(ret));
+ if (ret != -ENODEV)
+ error_hangup(bcs);
+ return ret;
+ }
+
+ req = bcs->channel ? HD_OPEN_B2CHANNEL : HD_OPEN_B1CHANNEL;
+ ret = req_submit(bcs, req, 0, BAS_TIMEOUT);
+ if (ret < 0) {
+ dev_err(cs->dev, "could not open channel B%d\n",
+ bcs->channel + 1);
+ stopurbs(bcs->hw.bas);
+ }
+
+ spin_unlock_irqrestore(&cs->lock, flags);
+ if (ret < 0 && ret != -ENODEV)
+ error_hangup(bcs);
+ return ret;
+}
+
+/* gigaset_close_bchannel
+ * called by common.c to disconnect a B channel
+ * tell the Gigaset base to close the channel
+ * stopping isochronous I/O and LL notification will be done when the
+ * acknowledgement for the close arrives
+ * argument:
+ * B channel control structure
+ * return value:
+ * 0 on success, error code < 0 on error
+ */
+static int gigaset_close_bchannel(struct bc_state *bcs)
+{
+ struct cardstate *cs = bcs->cs;
+ int req, ret;
+ unsigned long flags;
+
+ spin_lock_irqsave(&cs->lock, flags);
+ if (unlikely(!cs->connected)) {
+ spin_unlock_irqrestore(&cs->lock, flags);
+ gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__);
+ return -ENODEV;
+ }
+
+ if (!(cs->hw.bas->basstate & (bcs->channel ? BS_B2OPEN : BS_B1OPEN))) {
+ /* channel not running: just signal common.c */
+ spin_unlock_irqrestore(&cs->lock, flags);
+ gigaset_bchannel_down(bcs);
+ return 0;
+ }
+
+ /* channel running: tell device to close it */
+ req = bcs->channel ? HD_CLOSE_B2CHANNEL : HD_CLOSE_B1CHANNEL;
+ ret = req_submit(bcs, req, 0, BAS_TIMEOUT);
+ if (ret < 0)
+ dev_err(cs->dev, "closing channel B%d failed\n",
+ bcs->channel + 1);
+
+ spin_unlock_irqrestore(&cs->lock, flags);
+ return ret;
+}
+
+/* Device Operations */
+/* ================= */
+
+/* complete_cb
+ * unqueue first command buffer from queue, waking any sleepers
+ * must be called with cs->cmdlock held
+ * parameter:
+ * cs controller state structure
+ */
+static void complete_cb(struct cardstate *cs)
+{
+ struct cmdbuf_t *cb = cs->cmdbuf;
+
+ /* unqueue completed buffer */
+ cs->cmdbytes -= cs->curlen;
+ gig_dbg(DEBUG_OUTPUT, "write_command: sent %u bytes, %u left",
+ cs->curlen, cs->cmdbytes);
+ if (cb->next != NULL) {
+ cs->cmdbuf = cb->next;
+ cs->cmdbuf->prev = NULL;
+ cs->curlen = cs->cmdbuf->len;
+ } else {
+ cs->cmdbuf = NULL;
+ cs->lastcmdbuf = NULL;
+ cs->curlen = 0;
+ }
+
+ if (cb->wake_tasklet)
+ tasklet_schedule(cb->wake_tasklet);
+
+ kfree(cb);
+}
+
+/* write_command_callback
+ * USB completion handler for AT command transmission
+ * called by the USB subsystem in interrupt context
+ * parameter:
+ * urb USB request block of completed request
+ * urb->context = controller state structure
+ */
+static void write_command_callback(struct urb *urb)
+{
+ struct cardstate *cs = urb->context;
+ struct bas_cardstate *ucs = cs->hw.bas;
+ int status = urb->status;
+ unsigned long flags;
+
+ update_basstate(ucs, 0, BS_ATWRPEND);
+ wake_up(&ucs->waitqueue);
+
+ /* check status */
+ switch (status) {
+ case 0: /* normal completion */
+ break;
+ case -ENOENT: /* cancelled */
+ case -ECONNRESET: /* cancelled (async) */
+ case -EINPROGRESS: /* pending */
+ case -ENODEV: /* device removed */
+ case -ESHUTDOWN: /* device shut down */
+ /* ignore silently */
+ gig_dbg(DEBUG_USBREQ, "%s: %s",
+ __func__, get_usb_statmsg(status));
+ return;
+ default: /* any failure */
+ if (++ucs->retry_cmd_out > BAS_RETRY) {
+ dev_warn(cs->dev,
+ "command write: %s, "
+ "giving up after %d retries\n",
+ get_usb_statmsg(status),
+ ucs->retry_cmd_out);
+ break;
+ }
+ if (ucs->basstate & BS_SUSPEND) {
+ dev_warn(cs->dev,
+ "command write: %s, "
+ "won't retry - suspend requested\n",
+ get_usb_statmsg(status));
+ break;
+ }
+ if (cs->cmdbuf == NULL) {
+ dev_warn(cs->dev,
+ "command write: %s, "
+ "cannot retry - cmdbuf gone\n",
+ get_usb_statmsg(status));
+ break;
+ }
+ dev_notice(cs->dev, "command write: %s, retry %d\n",
+ get_usb_statmsg(status), ucs->retry_cmd_out);
+ if (atwrite_submit(cs, cs->cmdbuf->buf, cs->cmdbuf->len) >= 0)
+ /* resubmitted - bypass regular exit block */
+ return;
+ /* command send failed, assume base still waiting */
+ update_basstate(ucs, BS_ATREADY, 0);
+ }
+
+ spin_lock_irqsave(&cs->cmdlock, flags);
+ if (cs->cmdbuf != NULL)
+ complete_cb(cs);
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+}
+
+/* atrdy_timeout
+ * timeout routine for AT command transmission
+ * argument:
+ * controller state structure
+ */
+static void atrdy_timeout(struct timer_list *t)
+{
+ struct bas_cardstate *ucs = from_timer(ucs, t, timer_atrdy);
+ struct cardstate *cs = ucs->cs;
+
+ dev_warn(cs->dev, "timeout waiting for HD_READY_SEND_ATDATA\n");
+
+ /* fake the missing signal - what else can I do? */
+ update_basstate(ucs, BS_ATREADY, BS_ATTIMER);
+ start_cbsend(cs);
+}
+
+/* atwrite_submit
+ * submit an HD_WRITE_ATMESSAGE command URB
+ * parameters:
+ * cs controller state structure
+ * buf buffer containing command to send
+ * len length of command to send
+ * return value:
+ * 0 on success
+ * -EBUSY if another request is pending
+ * any URB submission error code
+ */
+static int atwrite_submit(struct cardstate *cs, unsigned char *buf, int len)
+{
+ struct bas_cardstate *ucs = cs->hw.bas;
+ int rc;
+
+ gig_dbg(DEBUG_USBREQ, "-------> HD_WRITE_ATMESSAGE (%d)", len);
+
+ if (update_basstate(ucs, BS_ATWRPEND, 0) & BS_ATWRPEND) {
+ dev_err(cs->dev,
+ "could not submit HD_WRITE_ATMESSAGE: URB busy\n");
+ return -EBUSY;
+ }
+
+ ucs->dr_cmd_out.bRequestType = OUT_VENDOR_REQ;
+ ucs->dr_cmd_out.bRequest = HD_WRITE_ATMESSAGE;
+ ucs->dr_cmd_out.wValue = 0;
+ ucs->dr_cmd_out.wIndex = 0;
+ ucs->dr_cmd_out.wLength = cpu_to_le16(len);
+ usb_fill_control_urb(ucs->urb_cmd_out, ucs->udev,
+ usb_sndctrlpipe(ucs->udev, 0),
+ (unsigned char *) &ucs->dr_cmd_out, buf, len,
+ write_command_callback, cs);
+ rc = usb_submit_urb(ucs->urb_cmd_out, GFP_ATOMIC);
+ if (unlikely(rc)) {
+ update_basstate(ucs, 0, BS_ATWRPEND);
+ dev_err(cs->dev, "could not submit HD_WRITE_ATMESSAGE: %s\n",
+ get_usb_rcmsg(rc));
+ return rc;
+ }
+
+ /* submitted successfully, start timeout if necessary */
+ if (!(update_basstate(ucs, BS_ATTIMER, BS_ATREADY) & BS_ATTIMER)) {
+ gig_dbg(DEBUG_OUTPUT, "setting ATREADY timeout of %d/10 secs",
+ ATRDY_TIMEOUT);
+ mod_timer(&ucs->timer_atrdy, jiffies + ATRDY_TIMEOUT * HZ / 10);
+ }
+ return 0;
+}
+
+/* start_cbsend
+ * start transmission of AT command queue if necessary
+ * parameter:
+ * cs controller state structure
+ * return value:
+ * 0 on success
+ * error code < 0 on error
+ */
+static int start_cbsend(struct cardstate *cs)
+{
+ struct cmdbuf_t *cb;
+ struct bas_cardstate *ucs = cs->hw.bas;
+ unsigned long flags;
+ int rc;
+ int retval = 0;
+
+ /* check if suspend requested */
+ if (ucs->basstate & BS_SUSPEND) {
+ gig_dbg(DEBUG_OUTPUT, "suspending");
+ return -EHOSTUNREACH;
+ }
+
+ /* check if AT channel is open */
+ if (!(ucs->basstate & BS_ATOPEN)) {
+ gig_dbg(DEBUG_OUTPUT, "AT channel not open");
+ rc = req_submit(cs->bcs, HD_OPEN_ATCHANNEL, 0, BAS_TIMEOUT);
+ if (rc < 0) {
+ /* flush command queue */
+ spin_lock_irqsave(&cs->cmdlock, flags);
+ while (cs->cmdbuf != NULL)
+ complete_cb(cs);
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+ }
+ return rc;
+ }
+
+ /* try to send first command in queue */
+ spin_lock_irqsave(&cs->cmdlock, flags);
+
+ while ((cb = cs->cmdbuf) != NULL && (ucs->basstate & BS_ATREADY)) {
+ ucs->retry_cmd_out = 0;
+ rc = atwrite_submit(cs, cb->buf, cb->len);
+ if (unlikely(rc)) {
+ retval = rc;
+ complete_cb(cs);
+ }
+ }
+
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+ return retval;
+}
+
+/* gigaset_write_cmd
+ * This function is called by the device independent part of the driver
+ * to transmit an AT command string to the Gigaset device.
+ * It encapsulates the device specific method for transmission over the
+ * direct USB connection to the base.
+ * The command string is added to the queue of commands to send, and
+ * USB transmission is started if necessary.
+ * parameters:
+ * cs controller state structure
+ * cb command buffer structure
+ * return value:
+ * number of bytes queued on success
+ * error code < 0 on error
+ */
+static int gigaset_write_cmd(struct cardstate *cs, struct cmdbuf_t *cb)
+{
+ unsigned long flags;
+ int rc;
+
+ gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
+ DEBUG_TRANSCMD : DEBUG_LOCKCMD,
+ "CMD Transmit", cb->len, cb->buf);
+
+ /* translate "+++" escape sequence sent as a single separate command
+ * into "close AT channel" command for error recovery
+ * The next command will reopen the AT channel automatically.
+ */
+ if (cb->len == 3 && !memcmp(cb->buf, "+++", 3)) {
+ /* If an HD_RECEIVEATDATA_ACK message remains unhandled
+ * because of an error, the base never sends another one.
+ * The response channel is thus effectively blocked.
+ * Closing and reopening the AT channel does *not* clear
+ * this condition.
+ * As a stopgap measure, submit a zero-length AT read
+ * before closing the AT channel. This has the undocumented
+ * effect of triggering a new HD_RECEIVEATDATA_ACK message
+ * from the base if necessary.
+ * The subsequent AT channel close then discards any pending
+ * messages.
+ */
+ spin_lock_irqsave(&cs->lock, flags);
+ if (!(cs->hw.bas->basstate & BS_ATRDPEND)) {
+ kfree(cs->hw.bas->rcvbuf);
+ cs->hw.bas->rcvbuf = NULL;
+ cs->hw.bas->rcvbuf_size = 0;
+ cs->hw.bas->retry_cmd_in = 0;
+ atread_submit(cs, 0);
+ }
+ spin_unlock_irqrestore(&cs->lock, flags);
+
+ rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, BAS_TIMEOUT);
+ if (cb->wake_tasklet)
+ tasklet_schedule(cb->wake_tasklet);
+ if (!rc)
+ rc = cb->len;
+ kfree(cb);
+ return rc;
+ }
+
+ spin_lock_irqsave(&cs->cmdlock, flags);
+ cb->prev = cs->lastcmdbuf;
+ if (cs->lastcmdbuf)
+ cs->lastcmdbuf->next = cb;
+ else {
+ cs->cmdbuf = cb;
+ cs->curlen = cb->len;
+ }
+ cs->cmdbytes += cb->len;
+ cs->lastcmdbuf = cb;
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+
+ spin_lock_irqsave(&cs->lock, flags);
+ if (unlikely(!cs->connected)) {
+ spin_unlock_irqrestore(&cs->lock, flags);
+ gig_dbg(DEBUG_USBREQ, "%s: not connected", __func__);
+ /* flush command queue */
+ spin_lock_irqsave(&cs->cmdlock, flags);
+ while (cs->cmdbuf != NULL)
+ complete_cb(cs);
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+ return -ENODEV;
+ }
+ rc = start_cbsend(cs);
+ spin_unlock_irqrestore(&cs->lock, flags);
+ return rc < 0 ? rc : cb->len;
+}
+
+/* gigaset_write_room
+ * tty_driver.write_room interface routine
+ * return number of characters the driver will accept to be written via
+ * gigaset_write_cmd
+ * parameter:
+ * controller state structure
+ * return value:
+ * number of characters
+ */
+static int gigaset_write_room(struct cardstate *cs)
+{
+ return IF_WRITEBUF;
+}
+
+/* gigaset_chars_in_buffer
+ * tty_driver.chars_in_buffer interface routine
+ * return number of characters waiting to be sent
+ * parameter:
+ * controller state structure
+ * return value:
+ * number of characters
+ */
+static int gigaset_chars_in_buffer(struct cardstate *cs)
+{
+ return cs->cmdbytes;
+}
+
+/* gigaset_brkchars
+ * implementation of ioctl(GIGASET_BRKCHARS)
+ * parameter:
+ * controller state structure
+ * return value:
+ * -EINVAL (unimplemented function)
+ */
+static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
+{
+ return -EINVAL;
+}
+
+
+/* Device Initialization/Shutdown */
+/* ============================== */
+
+/* Free hardware dependent part of the B channel structure
+ * parameter:
+ * bcs B channel structure
+ */
+static void gigaset_freebcshw(struct bc_state *bcs)
+{
+ struct bas_bc_state *ubc = bcs->hw.bas;
+ int i;
+
+ if (!ubc)
+ return;
+
+ /* kill URBs and tasklets before freeing - better safe than sorry */
+ ubc->running = 0;
+ gig_dbg(DEBUG_INIT, "%s: killing isoc URBs", __func__);
+ for (i = 0; i < BAS_OUTURBS; ++i) {
+ usb_kill_urb(ubc->isoouturbs[i].urb);
+ usb_free_urb(ubc->isoouturbs[i].urb);
+ }
+ for (i = 0; i < BAS_INURBS; ++i) {
+ usb_kill_urb(ubc->isoinurbs[i]);
+ usb_free_urb(ubc->isoinurbs[i]);
+ }
+ tasklet_kill(&ubc->sent_tasklet);
+ tasklet_kill(&ubc->rcvd_tasklet);
+ kfree(ubc->isooutbuf);
+ kfree(ubc);
+ bcs->hw.bas = NULL;
+}
+
+/* Initialize hardware dependent part of the B channel structure
+ * parameter:
+ * bcs B channel structure
+ * return value:
+ * 0 on success, error code < 0 on failure
+ */
+static int gigaset_initbcshw(struct bc_state *bcs)
+{
+ int i;
+ struct bas_bc_state *ubc;
+
+ bcs->hw.bas = ubc = kmalloc(sizeof(struct bas_bc_state), GFP_KERNEL);
+ if (!ubc) {
+ pr_err("out of memory\n");
+ return -ENOMEM;
+ }
+
+ ubc->running = 0;
+ atomic_set(&ubc->corrbytes, 0);
+ spin_lock_init(&ubc->isooutlock);
+ for (i = 0; i < BAS_OUTURBS; ++i) {
+ ubc->isoouturbs[i].urb = NULL;
+ ubc->isoouturbs[i].bcs = bcs;
+ }
+ ubc->isooutdone = ubc->isooutfree = ubc->isooutovfl = NULL;
+ ubc->numsub = 0;
+ ubc->isooutbuf = kmalloc(sizeof(struct isowbuf_t), GFP_KERNEL);
+ if (!ubc->isooutbuf) {
+ pr_err("out of memory\n");
+ kfree(ubc);
+ bcs->hw.bas = NULL;
+ return -ENOMEM;
+ }
+ tasklet_init(&ubc->sent_tasklet,
+ write_iso_tasklet, (unsigned long) bcs);
+
+ spin_lock_init(&ubc->isoinlock);
+ for (i = 0; i < BAS_INURBS; ++i)
+ ubc->isoinurbs[i] = NULL;
+ ubc->isoindone = NULL;
+ ubc->loststatus = -EINPROGRESS;
+ ubc->isoinlost = 0;
+ ubc->seqlen = 0;
+ ubc->inbyte = 0;
+ ubc->inbits = 0;
+ ubc->goodbytes = 0;
+ ubc->alignerrs = 0;
+ ubc->fcserrs = 0;
+ ubc->frameerrs = 0;
+ ubc->giants = 0;
+ ubc->runts = 0;
+ ubc->aborts = 0;
+ ubc->shared0s = 0;
+ ubc->stolen0s = 0;
+ tasklet_init(&ubc->rcvd_tasklet,
+ read_iso_tasklet, (unsigned long) bcs);
+ return 0;
+}
+
+static void gigaset_reinitbcshw(struct bc_state *bcs)
+{
+ struct bas_bc_state *ubc = bcs->hw.bas;
+
+ bcs->hw.bas->running = 0;
+ atomic_set(&bcs->hw.bas->corrbytes, 0);
+ bcs->hw.bas->numsub = 0;
+ spin_lock_init(&ubc->isooutlock);
+ spin_lock_init(&ubc->isoinlock);
+ ubc->loststatus = -EINPROGRESS;
+}
+
+static void gigaset_freecshw(struct cardstate *cs)
+{
+ /* timers, URBs and rcvbuf are disposed of in disconnect */
+ kfree(cs->hw.bas->int_in_buf);
+ kfree(cs->hw.bas);
+ cs->hw.bas = NULL;
+}
+
+/* Initialize hardware dependent part of the cardstate structure
+ * parameter:
+ * cs cardstate structure
+ * return value:
+ * 0 on success, error code < 0 on failure
+ */
+static int gigaset_initcshw(struct cardstate *cs)
+{
+ struct bas_cardstate *ucs;
+
+ cs->hw.bas = ucs = kzalloc(sizeof(*ucs), GFP_KERNEL);
+ if (!ucs) {
+ pr_err("out of memory\n");
+ return -ENOMEM;
+ }
+ ucs->int_in_buf = kmalloc(IP_MSGSIZE, GFP_KERNEL);
+ if (!ucs->int_in_buf) {
+ kfree(ucs);
+ pr_err("out of memory\n");
+ return -ENOMEM;
+ }
+
+ spin_lock_init(&ucs->lock);
+ ucs->cs = cs;
+ timer_setup(&ucs->timer_ctrl, req_timeout, 0);
+ timer_setup(&ucs->timer_atrdy, atrdy_timeout, 0);
+ timer_setup(&ucs->timer_cmd_in, cmd_in_timeout, 0);
+ timer_setup(&ucs->timer_int_in, int_in_resubmit, 0);
+ init_waitqueue_head(&ucs->waitqueue);
+ INIT_WORK(&ucs->int_in_wq, int_in_work);
+
+ return 0;
+}
+
+/* freeurbs
+ * unlink and deallocate all URBs unconditionally
+ * caller must make sure that no commands are still in progress
+ * parameter:
+ * cs controller state structure
+ */
+static void freeurbs(struct cardstate *cs)
+{
+ struct bas_cardstate *ucs = cs->hw.bas;
+ struct bas_bc_state *ubc;
+ int i, j;
+
+ gig_dbg(DEBUG_INIT, "%s: killing URBs", __func__);
+ for (j = 0; j < BAS_CHANNELS; ++j) {
+ ubc = cs->bcs[j].hw.bas;
+ for (i = 0; i < BAS_OUTURBS; ++i) {
+ usb_kill_urb(ubc->isoouturbs[i].urb);
+ usb_free_urb(ubc->isoouturbs[i].urb);
+ ubc->isoouturbs[i].urb = NULL;
+ }
+ for (i = 0; i < BAS_INURBS; ++i) {
+ usb_kill_urb(ubc->isoinurbs[i]);
+ usb_free_urb(ubc->isoinurbs[i]);
+ ubc->isoinurbs[i] = NULL;
+ }
+ }
+ usb_kill_urb(ucs->urb_int_in);
+ usb_free_urb(ucs->urb_int_in);
+ ucs->urb_int_in = NULL;
+ usb_kill_urb(ucs->urb_cmd_out);
+ usb_free_urb(ucs->urb_cmd_out);
+ ucs->urb_cmd_out = NULL;
+ usb_kill_urb(ucs->urb_cmd_in);
+ usb_free_urb(ucs->urb_cmd_in);
+ ucs->urb_cmd_in = NULL;
+ usb_kill_urb(ucs->urb_ctrl);
+ usb_free_urb(ucs->urb_ctrl);
+ ucs->urb_ctrl = NULL;
+}
+
+/* gigaset_probe
+ * This function is called when a new USB device is connected.
+ * It checks whether the new device is handled by this driver.
+ */
+static int gigaset_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
+{
+ struct usb_host_interface *hostif;
+ struct usb_device *udev = interface_to_usbdev(interface);
+ struct cardstate *cs = NULL;
+ struct bas_cardstate *ucs = NULL;
+ struct bas_bc_state *ubc;
+ struct usb_endpoint_descriptor *endpoint;
+ int i, j;
+ int rc;
+
+ gig_dbg(DEBUG_INIT,
+ "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
+ __func__, le16_to_cpu(udev->descriptor.idVendor),
+ le16_to_cpu(udev->descriptor.idProduct));
+
+ /* set required alternate setting */
+ hostif = interface->cur_altsetting;
+ if (hostif->desc.bAlternateSetting != 3) {
+ gig_dbg(DEBUG_INIT,
+ "%s: wrong alternate setting %d - trying to switch",
+ __func__, hostif->desc.bAlternateSetting);
+ if (usb_set_interface(udev, hostif->desc.bInterfaceNumber, 3)
+ < 0) {
+ dev_warn(&udev->dev, "usb_set_interface failed, "
+ "device %d interface %d altsetting %d\n",
+ udev->devnum, hostif->desc.bInterfaceNumber,
+ hostif->desc.bAlternateSetting);
+ return -ENODEV;
+ }
+ hostif = interface->cur_altsetting;
+ }
+
+ /* Reject application specific interfaces
+ */
+ if (hostif->desc.bInterfaceClass != 255) {
+ dev_warn(&udev->dev, "%s: bInterfaceClass == %d\n",
+ __func__, hostif->desc.bInterfaceClass);
+ return -ENODEV;
+ }
+
+ if (hostif->desc.bNumEndpoints < 1)
+ return -ENODEV;
+
+ dev_info(&udev->dev,
+ "%s: Device matched (Vendor: 0x%x, Product: 0x%x)\n",
+ __func__, le16_to_cpu(udev->descriptor.idVendor),
+ le16_to_cpu(udev->descriptor.idProduct));
+
+ /* allocate memory for our device state and initialize it */
+ cs = gigaset_initcs(driver, BAS_CHANNELS, 0, 0, cidmode,
+ GIGASET_MODULENAME);
+ if (!cs)
+ return -ENODEV;
+ ucs = cs->hw.bas;
+
+ /* save off device structure ptrs for later use */
+ usb_get_dev(udev);
+ ucs->udev = udev;
+ ucs->interface = interface;
+ cs->dev = &interface->dev;
+
+ /* allocate URBs:
+ * - one for the interrupt pipe
+ * - three for the different uses of the default control pipe
+ * - three for each isochronous pipe
+ */
+ if (!(ucs->urb_int_in = usb_alloc_urb(0, GFP_KERNEL)) ||
+ !(ucs->urb_cmd_in = usb_alloc_urb(0, GFP_KERNEL)) ||
+ !(ucs->urb_cmd_out = usb_alloc_urb(0, GFP_KERNEL)) ||
+ !(ucs->urb_ctrl = usb_alloc_urb(0, GFP_KERNEL)))
+ goto allocerr;
+
+ for (j = 0; j < BAS_CHANNELS; ++j) {
+ ubc = cs->bcs[j].hw.bas;
+ for (i = 0; i < BAS_OUTURBS; ++i)
+ if (!(ubc->isoouturbs[i].urb =
+ usb_alloc_urb(BAS_NUMFRAMES, GFP_KERNEL)))
+ goto allocerr;
+ for (i = 0; i < BAS_INURBS; ++i)
+ if (!(ubc->isoinurbs[i] =
+ usb_alloc_urb(BAS_NUMFRAMES, GFP_KERNEL)))
+ goto allocerr;
+ }
+
+ ucs->rcvbuf = NULL;
+ ucs->rcvbuf_size = 0;
+
+ /* Fill the interrupt urb and send it to the core */
+ endpoint = &hostif->endpoint[0].desc;
+ usb_fill_int_urb(ucs->urb_int_in, udev,
+ usb_rcvintpipe(udev,
+ usb_endpoint_num(endpoint)),
+ ucs->int_in_buf, IP_MSGSIZE, read_int_callback, cs,
+ endpoint->bInterval);
+ rc = usb_submit_urb(ucs->urb_int_in, GFP_KERNEL);
+ if (rc != 0) {
+ dev_err(cs->dev, "could not submit interrupt URB: %s\n",
+ get_usb_rcmsg(rc));
+ goto error;
+ }
+ ucs->retry_int_in = 0;
+
+ /* tell the device that the driver is ready */
+ rc = req_submit(cs->bcs, HD_DEVICE_INIT_ACK, 0, 0);
+ if (rc != 0)
+ goto error;
+
+ /* tell common part that the device is ready */
+ if (startmode == SM_LOCKED)
+ cs->mstate = MS_LOCKED;
+
+ /* save address of controller structure */
+ usb_set_intfdata(interface, cs);
+
+ rc = gigaset_start(cs);
+ if (rc < 0)
+ goto error;
+
+ return 0;
+
+allocerr:
+ dev_err(cs->dev, "could not allocate URBs\n");
+ rc = -ENOMEM;
+error:
+ freeurbs(cs);
+ usb_set_intfdata(interface, NULL);
+ usb_put_dev(udev);
+ gigaset_freecs(cs);
+ return rc;
+}
+
+/* gigaset_disconnect
+ * This function is called when the Gigaset base is unplugged.
+ */
+static void gigaset_disconnect(struct usb_interface *interface)
+{
+ struct cardstate *cs;
+ struct bas_cardstate *ucs;
+ int j;
+
+ cs = usb_get_intfdata(interface);
+
+ ucs = cs->hw.bas;
+
+ dev_info(cs->dev, "disconnecting Gigaset base\n");
+
+ /* mark base as not ready, all channels disconnected */
+ ucs->basstate = 0;
+
+ /* tell LL all channels are down */
+ for (j = 0; j < BAS_CHANNELS; ++j)
+ gigaset_bchannel_down(cs->bcs + j);
+
+ /* stop driver (common part) */
+ gigaset_stop(cs);
+
+ /* stop delayed work and URBs, free ressources */
+ del_timer_sync(&ucs->timer_ctrl);
+ del_timer_sync(&ucs->timer_atrdy);
+ del_timer_sync(&ucs->timer_cmd_in);
+ del_timer_sync(&ucs->timer_int_in);
+ cancel_work_sync(&ucs->int_in_wq);
+ freeurbs(cs);
+ usb_set_intfdata(interface, NULL);
+ kfree(ucs->rcvbuf);
+ ucs->rcvbuf = NULL;
+ ucs->rcvbuf_size = 0;
+ usb_put_dev(ucs->udev);
+ ucs->interface = NULL;
+ ucs->udev = NULL;
+ cs->dev = NULL;
+ gigaset_freecs(cs);
+}
+
+/* gigaset_suspend
+ * This function is called before the USB connection is suspended
+ * or before the USB device is reset.
+ * In the latter case, message == PMSG_ON.
+ */
+static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct cardstate *cs = usb_get_intfdata(intf);
+ struct bas_cardstate *ucs = cs->hw.bas;
+ int rc;
+
+ /* set suspend flag; this stops AT command/response traffic */
+ if (update_basstate(ucs, BS_SUSPEND, 0) & BS_SUSPEND) {
+ gig_dbg(DEBUG_SUSPEND, "already suspended");
+ return 0;
+ }
+
+ /* wait a bit for blocking conditions to go away */
+ rc = wait_event_timeout(ucs->waitqueue,
+ !(ucs->basstate &
+ (BS_B1OPEN | BS_B2OPEN | BS_ATRDPEND | BS_ATWRPEND)),
+ BAS_TIMEOUT * HZ / 10);
+ gig_dbg(DEBUG_SUSPEND, "wait_event_timeout() -> %d", rc);
+
+ /* check for conditions preventing suspend */
+ if (ucs->basstate & (BS_B1OPEN | BS_B2OPEN | BS_ATRDPEND | BS_ATWRPEND)) {
+ dev_warn(cs->dev, "cannot suspend:\n");
+ if (ucs->basstate & BS_B1OPEN)
+ dev_warn(cs->dev, " B channel 1 open\n");
+ if (ucs->basstate & BS_B2OPEN)
+ dev_warn(cs->dev, " B channel 2 open\n");
+ if (ucs->basstate & BS_ATRDPEND)
+ dev_warn(cs->dev, " receiving AT reply\n");
+ if (ucs->basstate & BS_ATWRPEND)
+ dev_warn(cs->dev, " sending AT command\n");
+ update_basstate(ucs, 0, BS_SUSPEND);
+ return -EBUSY;
+ }
+
+ /* close AT channel if open */
+ if (ucs->basstate & BS_ATOPEN) {
+ gig_dbg(DEBUG_SUSPEND, "closing AT channel");
+ rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, 0);
+ if (rc) {
+ update_basstate(ucs, 0, BS_SUSPEND);
+ return rc;
+ }
+ wait_event_timeout(ucs->waitqueue, !ucs->pending,
+ BAS_TIMEOUT * HZ / 10);
+ /* in case of timeout, proceed anyway */
+ }
+
+ /* kill all URBs and delayed work that might still be pending */
+ usb_kill_urb(ucs->urb_ctrl);
+ usb_kill_urb(ucs->urb_int_in);
+ del_timer_sync(&ucs->timer_ctrl);
+ del_timer_sync(&ucs->timer_atrdy);
+ del_timer_sync(&ucs->timer_cmd_in);
+ del_timer_sync(&ucs->timer_int_in);
+
+ /* don't try to cancel int_in_wq from within reset as it
+ * might be the one requesting the reset
+ */
+ if (message.event != PM_EVENT_ON)
+ cancel_work_sync(&ucs->int_in_wq);
+
+ gig_dbg(DEBUG_SUSPEND, "suspend complete");
+ return 0;
+}
+
+/* gigaset_resume
+ * This function is called after the USB connection has been resumed.
+ */
+static int gigaset_resume(struct usb_interface *intf)
+{
+ struct cardstate *cs = usb_get_intfdata(intf);
+ struct bas_cardstate *ucs = cs->hw.bas;
+ int rc;
+
+ /* resubmit interrupt URB for spontaneous messages from base */
+ rc = usb_submit_urb(ucs->urb_int_in, GFP_KERNEL);
+ if (rc) {
+ dev_err(cs->dev, "could not resubmit interrupt URB: %s\n",
+ get_usb_rcmsg(rc));
+ return rc;
+ }
+ ucs->retry_int_in = 0;
+
+ /* clear suspend flag to reallow activity */
+ update_basstate(ucs, 0, BS_SUSPEND);
+
+ gig_dbg(DEBUG_SUSPEND, "resume complete");
+ return 0;
+}
+
+/* gigaset_pre_reset
+ * This function is called before the USB connection is reset.
+ */
+static int gigaset_pre_reset(struct usb_interface *intf)
+{
+ /* handle just like suspend */
+ return gigaset_suspend(intf, PMSG_ON);
+}
+
+/* gigaset_post_reset
+ * This function is called after the USB connection has been reset.
+ */
+static int gigaset_post_reset(struct usb_interface *intf)
+{
+ /* FIXME: send HD_DEVICE_INIT_ACK? */
+
+ /* resume operations */
+ return gigaset_resume(intf);
+}
+
+
+static const struct gigaset_ops gigops = {
+ .write_cmd = gigaset_write_cmd,
+ .write_room = gigaset_write_room,
+ .chars_in_buffer = gigaset_chars_in_buffer,
+ .brkchars = gigaset_brkchars,
+ .init_bchannel = gigaset_init_bchannel,
+ .close_bchannel = gigaset_close_bchannel,
+ .initbcshw = gigaset_initbcshw,
+ .freebcshw = gigaset_freebcshw,
+ .reinitbcshw = gigaset_reinitbcshw,
+ .initcshw = gigaset_initcshw,
+ .freecshw = gigaset_freecshw,
+ .set_modem_ctrl = gigaset_set_modem_ctrl,
+ .baud_rate = gigaset_baud_rate,
+ .set_line_ctrl = gigaset_set_line_ctrl,
+ .send_skb = gigaset_isoc_send_skb,
+ .handle_input = gigaset_isoc_input,
+};
+
+/* bas_gigaset_init
+ * This function is called after the kernel module is loaded.
+ */
+static int __init bas_gigaset_init(void)
+{
+ int result;
+
+ /* allocate memory for our driver state and initialize it */
+ driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
+ GIGASET_MODULENAME, GIGASET_DEVNAME,
+ &gigops, THIS_MODULE);
+ if (driver == NULL)
+ goto error;
+
+ /* register this driver with the USB subsystem */
+ result = usb_register(&gigaset_usb_driver);
+ if (result < 0) {
+ pr_err("error %d registering USB driver\n", -result);
+ goto error;
+ }
+
+ pr_info(DRIVER_DESC "\n");
+ return 0;
+
+error:
+ if (driver)
+ gigaset_freedriver(driver);
+ driver = NULL;
+ return -1;
+}
+
+/* bas_gigaset_exit
+ * This function is called before the kernel module is unloaded.
+ */
+static void __exit bas_gigaset_exit(void)
+{
+ struct bas_cardstate *ucs;
+ int i;
+
+ gigaset_blockdriver(driver); /* => probe will fail
+ * => no gigaset_start any more
+ */
+
+ /* stop all connected devices */
+ for (i = 0; i < driver->minors; i++) {
+ if (gigaset_shutdown(driver->cs + i) < 0)
+ continue; /* no device */
+ /* from now on, no isdn callback should be possible */
+
+ /* close all still open channels */
+ ucs = driver->cs[i].hw.bas;
+ if (ucs->basstate & BS_B1OPEN) {
+ gig_dbg(DEBUG_INIT, "closing B1 channel");
+ usb_control_msg(ucs->udev,
+ usb_sndctrlpipe(ucs->udev, 0),
+ HD_CLOSE_B1CHANNEL, OUT_VENDOR_REQ,
+ 0, 0, NULL, 0, BAS_TIMEOUT);
+ }
+ if (ucs->basstate & BS_B2OPEN) {
+ gig_dbg(DEBUG_INIT, "closing B2 channel");
+ usb_control_msg(ucs->udev,
+ usb_sndctrlpipe(ucs->udev, 0),
+ HD_CLOSE_B2CHANNEL, OUT_VENDOR_REQ,
+ 0, 0, NULL, 0, BAS_TIMEOUT);
+ }
+ if (ucs->basstate & BS_ATOPEN) {
+ gig_dbg(DEBUG_INIT, "closing AT channel");
+ usb_control_msg(ucs->udev,
+ usb_sndctrlpipe(ucs->udev, 0),
+ HD_CLOSE_ATCHANNEL, OUT_VENDOR_REQ,
+ 0, 0, NULL, 0, BAS_TIMEOUT);
+ }
+ ucs->basstate = 0;
+ }
+
+ /* deregister this driver with the USB subsystem */
+ usb_deregister(&gigaset_usb_driver);
+ /* this will call the disconnect-callback */
+ /* from now on, no disconnect/probe callback should be running */
+
+ gigaset_freedriver(driver);
+ driver = NULL;
+}
+
+
+module_init(bas_gigaset_init);
+module_exit(bas_gigaset_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
--- /dev/null
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
++// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Kernel CAPI interface for the Gigaset driver
+ *
+ * Copyright (c) 2009 by Tilman Schmidt <tilman@imap.cc>.
+ *
+ * =====================================================================
+ * =====================================================================
+ */
+
+#include "gigaset.h"
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/ratelimit.h>
+#include <linux/isdn/capilli.h>
+#include <linux/isdn/capicmd.h>
+#include <linux/isdn/capiutil.h>
+#include <linux/export.h>
+
+/* missing from kernelcapi.h */
+#define CapiNcpiNotSupportedByProtocol 0x0001
+#define CapiFlagsNotSupportedByProtocol 0x0002
+#define CapiAlertAlreadySent 0x0003
+#define CapiFacilitySpecificFunctionNotSupported 0x3011
+
+/* missing from capicmd.h */
+#define CAPI_CONNECT_IND_BASELEN (CAPI_MSG_BASELEN + 4 + 2 + 8 * 1)
+#define CAPI_CONNECT_ACTIVE_IND_BASELEN (CAPI_MSG_BASELEN + 4 + 3 * 1)
+#define CAPI_CONNECT_B3_IND_BASELEN (CAPI_MSG_BASELEN + 4 + 1)
+#define CAPI_CONNECT_B3_ACTIVE_IND_BASELEN (CAPI_MSG_BASELEN + 4 + 1)
+#define CAPI_DATA_B3_REQ_LEN64 (CAPI_MSG_BASELEN + 4 + 4 + 2 + 2 + 2 + 8)
+#define CAPI_DATA_B3_CONF_LEN (CAPI_MSG_BASELEN + 4 + 2 + 2)
+#define CAPI_DISCONNECT_IND_LEN (CAPI_MSG_BASELEN + 4 + 2)
+#define CAPI_DISCONNECT_B3_IND_BASELEN (CAPI_MSG_BASELEN + 4 + 2 + 1)
+#define CAPI_FACILITY_CONF_BASELEN (CAPI_MSG_BASELEN + 4 + 2 + 2 + 1)
+/* most _CONF messages contain only Controller/PLCI/NCCI and Info parameters */
+#define CAPI_STDCONF_LEN (CAPI_MSG_BASELEN + 4 + 2)
+
+#define CAPI_FACILITY_HANDSET 0x0000
+#define CAPI_FACILITY_DTMF 0x0001
+#define CAPI_FACILITY_V42BIS 0x0002
+#define CAPI_FACILITY_SUPPSVC 0x0003
+#define CAPI_FACILITY_WAKEUP 0x0004
+#define CAPI_FACILITY_LI 0x0005
+
+#define CAPI_SUPPSVC_GETSUPPORTED 0x0000
+#define CAPI_SUPPSVC_LISTEN 0x0001
+
+/* missing from capiutil.h */
+#define CAPIMSG_PLCI_PART(m) CAPIMSG_U8(m, 9)
+#define CAPIMSG_NCCI_PART(m) CAPIMSG_U16(m, 10)
+#define CAPIMSG_HANDLE_REQ(m) CAPIMSG_U16(m, 18) /* DATA_B3_REQ/_IND only! */
+#define CAPIMSG_FLAGS(m) CAPIMSG_U16(m, 20)
+#define CAPIMSG_SETCONTROLLER(m, contr) capimsg_setu8(m, 8, contr)
+#define CAPIMSG_SETPLCI_PART(m, plci) capimsg_setu8(m, 9, plci)
+#define CAPIMSG_SETNCCI_PART(m, ncci) capimsg_setu16(m, 10, ncci)
+#define CAPIMSG_SETFLAGS(m, flags) capimsg_setu16(m, 20, flags)
+
+/* parameters with differing location in DATA_B3_CONF/_RESP: */
+#define CAPIMSG_SETHANDLE_CONF(m, handle) capimsg_setu16(m, 12, handle)
+#define CAPIMSG_SETINFO_CONF(m, info) capimsg_setu16(m, 14, info)
+
+/* Flags (DATA_B3_REQ/_IND) */
+#define CAPI_FLAGS_DELIVERY_CONFIRMATION 0x04
+#define CAPI_FLAGS_RESERVED (~0x1f)
+
+/* buffer sizes */
+#define MAX_BC_OCTETS 11
+#define MAX_HLC_OCTETS 3
+#define MAX_NUMBER_DIGITS 20
+#define MAX_FMT_IE_LEN 20
+
+/* values for bcs->apconnstate */
+#define APCONN_NONE 0 /* inactive/listening */
+#define APCONN_SETUP 1 /* connecting */
+#define APCONN_ACTIVE 2 /* B channel up */
+
+/* registered application data structure */
+struct gigaset_capi_appl {
+ struct list_head ctrlist;
+ struct gigaset_capi_appl *bcnext;
+ u16 id;
+ struct capi_register_params rp;
+ u16 nextMessageNumber;
+ u32 listenInfoMask;
+ u32 listenCIPmask;
+};
+
+/* CAPI specific controller data structure */
+struct gigaset_capi_ctr {
+ struct capi_ctr ctr;
+ struct list_head appls;
+ struct sk_buff_head sendqueue;
+ atomic_t sendqlen;
+ /* two _cmsg structures possibly used concurrently: */
+ _cmsg hcmsg; /* for message composition triggered from hardware */
+ _cmsg acmsg; /* for dissection of messages sent from application */
+ u8 bc_buf[MAX_BC_OCTETS + 1];
+ u8 hlc_buf[MAX_HLC_OCTETS + 1];
+ u8 cgpty_buf[MAX_NUMBER_DIGITS + 3];
+ u8 cdpty_buf[MAX_NUMBER_DIGITS + 2];
+};
+
+/* CIP Value table (from CAPI 2.0 standard, ch. 6.1) */
+static struct {
+ u8 *bc;
+ u8 *hlc;
+} cip2bchlc[] = {
+ [1] = { "8090A3", NULL }, /* Speech (A-law) */
+ [2] = { "8890", NULL }, /* Unrestricted digital information */
+ [3] = { "8990", NULL }, /* Restricted digital information */
+ [4] = { "9090A3", NULL }, /* 3,1 kHz audio (A-law) */
+ [5] = { "9190", NULL }, /* 7 kHz audio */
+ [6] = { "9890", NULL }, /* Video */
+ [7] = { "88C0C6E6", NULL }, /* Packet mode */
+ [8] = { "8890218F", NULL }, /* 56 kbit/s rate adaptation */
+ [9] = { "9190A5", NULL }, /* Unrestricted digital information
+ * with tones/announcements */
+ [16] = { "8090A3", "9181" }, /* Telephony */
+ [17] = { "9090A3", "9184" }, /* Group 2/3 facsimile */
+ [18] = { "8890", "91A1" }, /* Group 4 facsimile Class 1 */
+ [19] = { "8890", "91A4" }, /* Teletex service basic and mixed mode
+ * and Group 4 facsimile service
+ * Classes II and III */
+ [20] = { "8890", "91A8" }, /* Teletex service basic and
+ * processable mode */
+ [21] = { "8890", "91B1" }, /* Teletex service basic mode */
+ [22] = { "8890", "91B2" }, /* International interworking for
+ * Videotex */
+ [23] = { "8890", "91B5" }, /* Telex */
+ [24] = { "8890", "91B8" }, /* Message Handling Systems
+ * in accordance with X.400 */
+ [25] = { "8890", "91C1" }, /* OSI application
+ * in accordance with X.200 */
+ [26] = { "9190A5", "9181" }, /* 7 kHz telephony */
+ [27] = { "9190A5", "916001" }, /* Video telephony, first connection */
+ [28] = { "8890", "916002" }, /* Video telephony, second connection */
+};
+
+/*
+ * helper functions
+ * ================
+ */
+
+/*
+ * emit unsupported parameter warning
+ */
+static inline void ignore_cstruct_param(struct cardstate *cs, _cstruct param,
+ char *msgname, char *paramname)
+{
+ if (param && *param)
+ dev_warn(cs->dev, "%s: ignoring unsupported parameter: %s\n",
+ msgname, paramname);
+}
+
+/*
+ * convert an IE from Gigaset hex string to ETSI binary representation
+ * including length byte
+ * return value: result length, -1 on error
+ */
+static int encode_ie(char *in, u8 *out, int maxlen)
+{
+ int l = 0;
+ while (*in) {
+ if (!isxdigit(in[0]) || !isxdigit(in[1]) || l >= maxlen)
+ return -1;
+ out[++l] = (hex_to_bin(in[0]) << 4) + hex_to_bin(in[1]);
+ in += 2;
+ }
+ out[0] = l;
+ return l;
+}
+
+/*
+ * convert an IE from ETSI binary representation including length byte
+ * to Gigaset hex string
+ */
+static void decode_ie(u8 *in, char *out)
+{
+ int i = *in;
+ while (i-- > 0) {
+ /* ToDo: conversion to upper case necessary? */
+ *out++ = toupper(hex_asc_hi(*++in));
+ *out++ = toupper(hex_asc_lo(*in));
+ }
+}
+
+/*
+ * retrieve application data structure for an application ID
+ */
+static inline struct gigaset_capi_appl *
+get_appl(struct gigaset_capi_ctr *iif, u16 appl)
+{
+ struct gigaset_capi_appl *ap;
+
+ list_for_each_entry(ap, &iif->appls, ctrlist)
+ if (ap->id == appl)
+ return ap;
+ return NULL;
+}
+
+/*
+ * dump CAPI message to kernel messages for debugging
+ */
+static inline void dump_cmsg(enum debuglevel level, const char *tag, _cmsg *p)
+{
+#ifdef CONFIG_GIGASET_DEBUG
+ /* dump at most 20 messages in 20 secs */
+ static DEFINE_RATELIMIT_STATE(msg_dump_ratelimit, 20 * HZ, 20);
+ _cdebbuf *cdb;
+
+ if (!(gigaset_debuglevel & level))
+ return;
+ if (!___ratelimit(&msg_dump_ratelimit, tag))
+ return;
+
+ cdb = capi_cmsg2str(p);
+ if (cdb) {
+ gig_dbg(level, "%s: [%d] %s", tag, p->ApplId, cdb->buf);
+ cdebbuf_free(cdb);
+ } else {
+ gig_dbg(level, "%s: [%d] %s", tag, p->ApplId,
+ capi_cmd2str(p->Command, p->Subcommand));
+ }
+#endif
+}
+
+static inline void dump_rawmsg(enum debuglevel level, const char *tag,
+ unsigned char *data)
+{
+#ifdef CONFIG_GIGASET_DEBUG
+ char *dbgline;
+ int i, l;
+
+ if (!(gigaset_debuglevel & level))
+ return;
+
+ l = CAPIMSG_LEN(data);
+ if (l < 12) {
+ gig_dbg(level, "%s: ??? LEN=%04d", tag, l);
+ return;
+ }
+ gig_dbg(level, "%s: 0x%02x:0x%02x: ID=%03d #0x%04x LEN=%04d NCCI=0x%x",
+ tag, CAPIMSG_COMMAND(data), CAPIMSG_SUBCOMMAND(data),
+ CAPIMSG_APPID(data), CAPIMSG_MSGID(data), l,
+ CAPIMSG_CONTROL(data));
+ l -= 12;
+ if (l <= 0)
+ return;
+ if (l > 64)
+ l = 64; /* arbitrary limit */
+ dbgline = kmalloc_array(3, l, GFP_ATOMIC);
+ if (!dbgline)
+ return;
+ for (i = 0; i < l; i++) {
+ dbgline[3 * i] = hex_asc_hi(data[12 + i]);
+ dbgline[3 * i + 1] = hex_asc_lo(data[12 + i]);
+ dbgline[3 * i + 2] = ' ';
+ }
+ dbgline[3 * l - 1] = '\0';
+ gig_dbg(level, " %s", dbgline);
+ kfree(dbgline);
+ if (CAPIMSG_COMMAND(data) == CAPI_DATA_B3 &&
+ (CAPIMSG_SUBCOMMAND(data) == CAPI_REQ ||
+ CAPIMSG_SUBCOMMAND(data) == CAPI_IND)) {
+ l = CAPIMSG_DATALEN(data);
+ gig_dbg(level, " DataLength=%d", l);
+ if (l <= 0 || !(gigaset_debuglevel & DEBUG_LLDATA))
+ return;
+ if (l > 64)
+ l = 64; /* arbitrary limit */
+ dbgline = kmalloc_array(3, l, GFP_ATOMIC);
+ if (!dbgline)
+ return;
+ data += CAPIMSG_LEN(data);
+ for (i = 0; i < l; i++) {
+ dbgline[3 * i] = hex_asc_hi(data[i]);
+ dbgline[3 * i + 1] = hex_asc_lo(data[i]);
+ dbgline[3 * i + 2] = ' ';
+ }
+ dbgline[3 * l - 1] = '\0';
+ gig_dbg(level, " %s", dbgline);
+ kfree(dbgline);
+ }
+#endif
+}
+
+/*
+ * format CAPI IE as string
+ */
+
+#ifdef CONFIG_GIGASET_DEBUG
+static const char *format_ie(const char *ie)
+{
+ static char result[3 * MAX_FMT_IE_LEN];
+ int len, count;
+ char *pout = result;
+
+ if (!ie)
+ return "NULL";
+
+ count = len = ie[0];
+ if (count > MAX_FMT_IE_LEN)
+ count = MAX_FMT_IE_LEN - 1;
+ while (count--) {
+ *pout++ = hex_asc_hi(*++ie);
+ *pout++ = hex_asc_lo(*ie);
+ *pout++ = ' ';
+ }
+ if (len > MAX_FMT_IE_LEN) {
+ *pout++ = '.';
+ *pout++ = '.';
+ *pout++ = '.';
+ }
+ *--pout = 0;
+ return result;
+}
+#endif
+
+/*
+ * emit DATA_B3_CONF message
+ */
+static void send_data_b3_conf(struct cardstate *cs, struct capi_ctr *ctr,
+ u16 appl, u16 msgid, int channel,
+ u16 handle, u16 info)
+{
+ struct sk_buff *cskb;
+ u8 *msg;
+
+ cskb = alloc_skb(CAPI_DATA_B3_CONF_LEN, GFP_ATOMIC);
+ if (!cskb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ /* frequent message, avoid _cmsg overhead */
+ msg = __skb_put(cskb, CAPI_DATA_B3_CONF_LEN);
+ CAPIMSG_SETLEN(msg, CAPI_DATA_B3_CONF_LEN);
+ CAPIMSG_SETAPPID(msg, appl);
+ CAPIMSG_SETCOMMAND(msg, CAPI_DATA_B3);
+ CAPIMSG_SETSUBCOMMAND(msg, CAPI_CONF);
+ CAPIMSG_SETMSGID(msg, msgid);
+ CAPIMSG_SETCONTROLLER(msg, ctr->cnr);
+ CAPIMSG_SETPLCI_PART(msg, channel);
+ CAPIMSG_SETNCCI_PART(msg, 1);
+ CAPIMSG_SETHANDLE_CONF(msg, handle);
+ CAPIMSG_SETINFO_CONF(msg, info);
+
+ /* emit message */
+ dump_rawmsg(DEBUG_MCMD, __func__, msg);
+ capi_ctr_handle_message(ctr, appl, cskb);
+}
+
+
+/*
+ * driver interface functions
+ * ==========================
+ */
+
+/**
+ * gigaset_skb_sent() - acknowledge transmission of outgoing skb
+ * @bcs: B channel descriptor structure.
+ * @skb: sent data.
+ *
+ * Called by hardware module {bas,ser,usb}_gigaset when the data in a
+ * skb has been successfully sent, for signalling completion to the LL.
+ */
+void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *dskb)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct gigaset_capi_appl *ap = bcs->ap;
+ unsigned char *req = skb_mac_header(dskb);
+ u16 flags;
+
+ /* update statistics */
+ ++bcs->trans_up;
+
+ if (!ap) {
+ gig_dbg(DEBUG_MCMD, "%s: application gone", __func__);
+ return;
+ }
+
+ /* don't send further B3 messages if disconnected */
+ if (bcs->apconnstate < APCONN_ACTIVE) {
+ gig_dbg(DEBUG_MCMD, "%s: disconnected", __func__);
+ return;
+ }
+
+ /*
+ * send DATA_B3_CONF if "delivery confirmation" bit was set in request;
+ * otherwise it has already been sent by do_data_b3_req()
+ */
+ flags = CAPIMSG_FLAGS(req);
+ if (flags & CAPI_FLAGS_DELIVERY_CONFIRMATION)
+ send_data_b3_conf(cs, &iif->ctr, ap->id, CAPIMSG_MSGID(req),
+ bcs->channel + 1, CAPIMSG_HANDLE_REQ(req),
+ (flags & ~CAPI_FLAGS_DELIVERY_CONFIRMATION) ?
+ CapiFlagsNotSupportedByProtocol :
+ CAPI_NOERROR);
+}
+EXPORT_SYMBOL_GPL(gigaset_skb_sent);
+
+/**
+ * gigaset_skb_rcvd() - pass received skb to LL
+ * @bcs: B channel descriptor structure.
+ * @skb: received data.
+ *
+ * Called by hardware module {bas,ser,usb}_gigaset when user data has
+ * been successfully received, for passing to the LL.
+ * Warning: skb must not be accessed anymore!
+ */
+void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct gigaset_capi_appl *ap = bcs->ap;
+ int len = skb->len;
+
+ /* update statistics */
+ bcs->trans_down++;
+
+ if (!ap) {
+ gig_dbg(DEBUG_MCMD, "%s: application gone", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+
+ /* don't send further B3 messages if disconnected */
+ if (bcs->apconnstate < APCONN_ACTIVE) {
+ gig_dbg(DEBUG_MCMD, "%s: disconnected", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+
+ /*
+ * prepend DATA_B3_IND message to payload
+ * Parameters: NCCI = 1, all others 0/unused
+ * frequent message, avoid _cmsg overhead
+ */
+ skb_push(skb, CAPI_DATA_B3_REQ_LEN);
+ CAPIMSG_SETLEN(skb->data, CAPI_DATA_B3_REQ_LEN);
+ CAPIMSG_SETAPPID(skb->data, ap->id);
+ CAPIMSG_SETCOMMAND(skb->data, CAPI_DATA_B3);
+ CAPIMSG_SETSUBCOMMAND(skb->data, CAPI_IND);
+ CAPIMSG_SETMSGID(skb->data, ap->nextMessageNumber++);
+ CAPIMSG_SETCONTROLLER(skb->data, iif->ctr.cnr);
+ CAPIMSG_SETPLCI_PART(skb->data, bcs->channel + 1);
+ CAPIMSG_SETNCCI_PART(skb->data, 1);
+ /* Data parameter not used */
+ CAPIMSG_SETDATALEN(skb->data, len);
+ /* Data handle parameter not used */
+ CAPIMSG_SETFLAGS(skb->data, 0);
+ /* Data64 parameter not present */
+
+ /* emit message */
+ dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+EXPORT_SYMBOL_GPL(gigaset_skb_rcvd);
+
+/**
+ * gigaset_isdn_rcv_err() - signal receive error
+ * @bcs: B channel descriptor structure.
+ *
+ * Called by hardware module {bas,ser,usb}_gigaset when a receive error
+ * has occurred, for signalling to the LL.
+ */
+void gigaset_isdn_rcv_err(struct bc_state *bcs)
+{
+ /* if currently ignoring packets, just count down */
+ if (bcs->ignore) {
+ bcs->ignore--;
+ return;
+ }
+
+ /* update statistics */
+ bcs->corrupted++;
+
+ /* ToDo: signal error -> LL */
+}
+EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err);
+
+/**
+ * gigaset_isdn_icall() - signal incoming call
+ * @at_state: connection state structure.
+ *
+ * Called by main module at tasklet level to notify the LL that an incoming
+ * call has been received. @at_state contains the parameters of the call.
+ *
+ * Return value: call disposition (ICALL_*)
+ */
+int gigaset_isdn_icall(struct at_state_t *at_state)
+{
+ struct cardstate *cs = at_state->cs;
+ struct bc_state *bcs = at_state->bcs;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct gigaset_capi_appl *ap;
+ u32 actCIPmask;
+ struct sk_buff *skb;
+ unsigned int msgsize;
+ unsigned long flags;
+ int i;
+
+ /*
+ * ToDo: signal calls without a free B channel, too
+ * (requires a u8 handle for the at_state structure that can
+ * be stored in the PLCI and used in the CONNECT_RESP message
+ * handler to retrieve it)
+ */
+ if (!bcs)
+ return ICALL_IGNORE;
+
+ /* prepare CONNECT_IND message, using B channel number as PLCI */
+ capi_cmsg_header(&iif->hcmsg, 0, CAPI_CONNECT, CAPI_IND, 0,
+ iif->ctr.cnr | ((bcs->channel + 1) << 8));
+
+ /* minimum size, all structs empty */
+ msgsize = CAPI_CONNECT_IND_BASELEN;
+
+ /* Bearer Capability (mandatory) */
+ if (at_state->str_var[STR_ZBC]) {
+ /* pass on BC from Gigaset */
+ if (encode_ie(at_state->str_var[STR_ZBC], iif->bc_buf,
+ MAX_BC_OCTETS) < 0) {
+ dev_warn(cs->dev, "RING ignored - bad BC %s\n",
+ at_state->str_var[STR_ZBC]);
+ return ICALL_IGNORE;
+ }
+
+ /* look up corresponding CIP value */
+ iif->hcmsg.CIPValue = 0; /* default if nothing found */
+ for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
+ if (cip2bchlc[i].bc != NULL &&
+ cip2bchlc[i].hlc == NULL &&
+ !strcmp(cip2bchlc[i].bc,
+ at_state->str_var[STR_ZBC])) {
+ iif->hcmsg.CIPValue = i;
+ break;
+ }
+ } else {
+ /* no BC (internal call): assume CIP 1 (speech, A-law) */
+ iif->hcmsg.CIPValue = 1;
+ encode_ie(cip2bchlc[1].bc, iif->bc_buf, MAX_BC_OCTETS);
+ }
+ iif->hcmsg.BC = iif->bc_buf;
+ msgsize += iif->hcmsg.BC[0];
+
+ /* High Layer Compatibility (optional) */
+ if (at_state->str_var[STR_ZHLC]) {
+ /* pass on HLC from Gigaset */
+ if (encode_ie(at_state->str_var[STR_ZHLC], iif->hlc_buf,
+ MAX_HLC_OCTETS) < 0) {
+ dev_warn(cs->dev, "RING ignored - bad HLC %s\n",
+ at_state->str_var[STR_ZHLC]);
+ return ICALL_IGNORE;
+ }
+ iif->hcmsg.HLC = iif->hlc_buf;
+ msgsize += iif->hcmsg.HLC[0];
+
+ /* look up corresponding CIP value */
+ /* keep BC based CIP value if none found */
+ if (at_state->str_var[STR_ZBC])
+ for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
+ if (cip2bchlc[i].hlc != NULL &&
+ !strcmp(cip2bchlc[i].hlc,
+ at_state->str_var[STR_ZHLC]) &&
+ !strcmp(cip2bchlc[i].bc,
+ at_state->str_var[STR_ZBC])) {
+ iif->hcmsg.CIPValue = i;
+ break;
+ }
+ }
+
+ /* Called Party Number (optional) */
+ if (at_state->str_var[STR_ZCPN]) {
+ i = strlen(at_state->str_var[STR_ZCPN]);
+ if (i > MAX_NUMBER_DIGITS) {
+ dev_warn(cs->dev, "RING ignored - bad number %s\n",
+ at_state->str_var[STR_ZBC]);
+ return ICALL_IGNORE;
+ }
+ iif->cdpty_buf[0] = i + 1;
+ iif->cdpty_buf[1] = 0x80; /* type / numbering plan unknown */
+ memcpy(iif->cdpty_buf + 2, at_state->str_var[STR_ZCPN], i);
+ iif->hcmsg.CalledPartyNumber = iif->cdpty_buf;
+ msgsize += iif->hcmsg.CalledPartyNumber[0];
+ }
+
+ /* Calling Party Number (optional) */
+ if (at_state->str_var[STR_NMBR]) {
+ i = strlen(at_state->str_var[STR_NMBR]);
+ if (i > MAX_NUMBER_DIGITS) {
+ dev_warn(cs->dev, "RING ignored - bad number %s\n",
+ at_state->str_var[STR_ZBC]);
+ return ICALL_IGNORE;
+ }
+ iif->cgpty_buf[0] = i + 2;
+ iif->cgpty_buf[1] = 0x00; /* type / numbering plan unknown */
+ iif->cgpty_buf[2] = 0x80; /* pres. allowed, not screened */
+ memcpy(iif->cgpty_buf + 3, at_state->str_var[STR_NMBR], i);
+ iif->hcmsg.CallingPartyNumber = iif->cgpty_buf;
+ msgsize += iif->hcmsg.CallingPartyNumber[0];
+ }
+
+ /* remaining parameters (not supported, always left NULL):
+ * - CalledPartySubaddress
+ * - CallingPartySubaddress
+ * - AdditionalInfo
+ * - BChannelinformation
+ * - Keypadfacility
+ * - Useruserdata
+ * - Facilitydataarray
+ */
+
+ gig_dbg(DEBUG_CMD, "icall: PLCI %x CIP %d BC %s",
+ iif->hcmsg.adr.adrPLCI, iif->hcmsg.CIPValue,
+ format_ie(iif->hcmsg.BC));
+ gig_dbg(DEBUG_CMD, "icall: HLC %s",
+ format_ie(iif->hcmsg.HLC));
+ gig_dbg(DEBUG_CMD, "icall: CgPty %s",
+ format_ie(iif->hcmsg.CallingPartyNumber));
+ gig_dbg(DEBUG_CMD, "icall: CdPty %s",
+ format_ie(iif->hcmsg.CalledPartyNumber));
+
+ /* scan application list for matching listeners */
+ spin_lock_irqsave(&bcs->aplock, flags);
+ if (bcs->ap != NULL || bcs->apconnstate != APCONN_NONE) {
+ dev_warn(cs->dev, "%s: channel not properly cleared (%p/%d)\n",
+ __func__, bcs->ap, bcs->apconnstate);
+ bcs->ap = NULL;
+ bcs->apconnstate = APCONN_NONE;
+ }
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ actCIPmask = 1 | (1 << iif->hcmsg.CIPValue);
+ list_for_each_entry(ap, &iif->appls, ctrlist)
+ if (actCIPmask & ap->listenCIPmask) {
+ /* build CONNECT_IND message for this application */
+ iif->hcmsg.ApplId = ap->id;
+ iif->hcmsg.Messagenumber = ap->nextMessageNumber++;
+
+ skb = alloc_skb(msgsize, GFP_ATOMIC);
+ if (!skb) {
+ dev_err(cs->dev, "%s: out of memory\n",
+ __func__);
+ break;
+ }
+ if (capi_cmsg2message(&iif->hcmsg,
+ __skb_put(skb, msgsize))) {
+ dev_err(cs->dev, "%s: message parser failure\n",
+ __func__);
+ dev_kfree_skb_any(skb);
+ break;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
+
+ /* add to listeners on this B channel, update state */
+ spin_lock_irqsave(&bcs->aplock, flags);
+ ap->bcnext = bcs->ap;
+ bcs->ap = ap;
+ bcs->chstate |= CHS_NOTIFY_LL;
+ bcs->apconnstate = APCONN_SETUP;
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+
+ /* emit message */
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+ }
+
+ /*
+ * Return "accept" if any listeners.
+ * Gigaset will send ALERTING.
+ * There doesn't seem to be a way to avoid this.
+ */
+ return bcs->ap ? ICALL_ACCEPT : ICALL_IGNORE;
+}
+
+/*
+ * send a DISCONNECT_IND message to an application
+ * does not sleep, clobbers the controller's hcmsg structure
+ */
+static void send_disconnect_ind(struct bc_state *bcs,
+ struct gigaset_capi_appl *ap, u16 reason)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct sk_buff *skb;
+
+ if (bcs->apconnstate == APCONN_NONE)
+ return;
+
+ capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT, CAPI_IND,
+ ap->nextMessageNumber++,
+ iif->ctr.cnr | ((bcs->channel + 1) << 8));
+ iif->hcmsg.Reason = reason;
+ skb = alloc_skb(CAPI_DISCONNECT_IND_LEN, GFP_ATOMIC);
+ if (!skb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ if (capi_cmsg2message(&iif->hcmsg,
+ __skb_put(skb, CAPI_DISCONNECT_IND_LEN))) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+
+/*
+ * send a DISCONNECT_B3_IND message to an application
+ * Parameters: NCCI = 1, NCPI empty, Reason_B3 = 0
+ * does not sleep, clobbers the controller's hcmsg structure
+ */
+static void send_disconnect_b3_ind(struct bc_state *bcs,
+ struct gigaset_capi_appl *ap)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct sk_buff *skb;
+
+ /* nothing to do if no logical connection active */
+ if (bcs->apconnstate < APCONN_ACTIVE)
+ return;
+ bcs->apconnstate = APCONN_SETUP;
+
+ capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
+ ap->nextMessageNumber++,
+ iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
+ skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_ATOMIC);
+ if (!skb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ if (capi_cmsg2message(&iif->hcmsg,
+ __skb_put(skb, CAPI_DISCONNECT_B3_IND_BASELEN))) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+
+/**
+ * gigaset_isdn_connD() - signal D channel connect
+ * @bcs: B channel descriptor structure.
+ *
+ * Called by main module at tasklet level to notify the LL that the D channel
+ * connection has been established.
+ */
+void gigaset_isdn_connD(struct bc_state *bcs)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct gigaset_capi_appl *ap;
+ struct sk_buff *skb;
+ unsigned int msgsize;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bcs->aplock, flags);
+ ap = bcs->ap;
+ if (!ap) {
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ gig_dbg(DEBUG_CMD, "%s: application gone", __func__);
+ return;
+ }
+ if (bcs->apconnstate == APCONN_NONE) {
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ dev_warn(cs->dev, "%s: application %u not connected\n",
+ __func__, ap->id);
+ return;
+ }
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ while (ap->bcnext) {
+ /* this should never happen */
+ dev_warn(cs->dev, "%s: dropping extra application %u\n",
+ __func__, ap->bcnext->id);
+ send_disconnect_ind(bcs, ap->bcnext,
+ CapiCallGivenToOtherApplication);
+ ap->bcnext = ap->bcnext->bcnext;
+ }
+
+ /* prepare CONNECT_ACTIVE_IND message
+ * Note: LLC not supported by device
+ */
+ capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_CONNECT_ACTIVE, CAPI_IND,
+ ap->nextMessageNumber++,
+ iif->ctr.cnr | ((bcs->channel + 1) << 8));
+
+ /* minimum size, all structs empty */
+ msgsize = CAPI_CONNECT_ACTIVE_IND_BASELEN;
+
+ /* ToDo: set parameter: Connected number
+ * (requires ev-layer state machine extension to collect
+ * ZCON device reply)
+ */
+
+ /* build and emit CONNECT_ACTIVE_IND message */
+ skb = alloc_skb(msgsize, GFP_ATOMIC);
+ if (!skb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ if (capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize))) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+
+/**
+ * gigaset_isdn_hupD() - signal D channel hangup
+ * @bcs: B channel descriptor structure.
+ *
+ * Called by main module at tasklet level to notify the LL that the D channel
+ * connection has been shut down.
+ */
+void gigaset_isdn_hupD(struct bc_state *bcs)
+{
+ struct gigaset_capi_appl *ap;
+ unsigned long flags;
+
+ /*
+ * ToDo: pass on reason code reported by device
+ * (requires ev-layer state machine extension to collect
+ * ZCAU device reply)
+ */
+ spin_lock_irqsave(&bcs->aplock, flags);
+ while (bcs->ap != NULL) {
+ ap = bcs->ap;
+ bcs->ap = ap->bcnext;
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ send_disconnect_b3_ind(bcs, ap);
+ send_disconnect_ind(bcs, ap, 0);
+ spin_lock_irqsave(&bcs->aplock, flags);
+ }
+ bcs->apconnstate = APCONN_NONE;
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+}
+
+/**
+ * gigaset_isdn_connB() - signal B channel connect
+ * @bcs: B channel descriptor structure.
+ *
+ * Called by main module at tasklet level to notify the LL that the B channel
+ * connection has been established.
+ */
+void gigaset_isdn_connB(struct bc_state *bcs)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct gigaset_capi_appl *ap;
+ struct sk_buff *skb;
+ unsigned long flags;
+ unsigned int msgsize;
+ u8 command;
+
+ spin_lock_irqsave(&bcs->aplock, flags);
+ ap = bcs->ap;
+ if (!ap) {
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ gig_dbg(DEBUG_CMD, "%s: application gone", __func__);
+ return;
+ }
+ if (!bcs->apconnstate) {
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ dev_warn(cs->dev, "%s: application %u not connected\n",
+ __func__, ap->id);
+ return;
+ }
+
+ /*
+ * emit CONNECT_B3_ACTIVE_IND if we already got CONNECT_B3_REQ;
+ * otherwise we have to emit CONNECT_B3_IND first, and follow up with
+ * CONNECT_B3_ACTIVE_IND in reply to CONNECT_B3_RESP
+ * Parameters in both cases always: NCCI = 1, NCPI empty
+ */
+ if (bcs->apconnstate >= APCONN_ACTIVE) {
+ command = CAPI_CONNECT_B3_ACTIVE;
+ msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
+ } else {
+ command = CAPI_CONNECT_B3;
+ msgsize = CAPI_CONNECT_B3_IND_BASELEN;
+ }
+ bcs->apconnstate = APCONN_ACTIVE;
+
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+
+ while (ap->bcnext) {
+ /* this should never happen */
+ dev_warn(cs->dev, "%s: dropping extra application %u\n",
+ __func__, ap->bcnext->id);
+ send_disconnect_ind(bcs, ap->bcnext,
+ CapiCallGivenToOtherApplication);
+ ap->bcnext = ap->bcnext->bcnext;
+ }
+
+ capi_cmsg_header(&iif->hcmsg, ap->id, command, CAPI_IND,
+ ap->nextMessageNumber++,
+ iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
+ skb = alloc_skb(msgsize, GFP_ATOMIC);
+ if (!skb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ if (capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize))) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+
+/**
+ * gigaset_isdn_hupB() - signal B channel hangup
+ * @bcs: B channel descriptor structure.
+ *
+ * Called by main module to notify the LL that the B channel connection has
+ * been shut down.
+ */
+void gigaset_isdn_hupB(struct bc_state *bcs)
+{
+ struct gigaset_capi_appl *ap = bcs->ap;
+
+ /* ToDo: assure order of DISCONNECT_B3_IND and DISCONNECT_IND ? */
+
+ if (!ap) {
+ gig_dbg(DEBUG_CMD, "%s: application gone", __func__);
+ return;
+ }
+
+ send_disconnect_b3_ind(bcs, ap);
+}
+
+/**
+ * gigaset_isdn_start() - signal device availability
+ * @cs: device descriptor structure.
+ *
+ * Called by main module to notify the LL that the device is available for
+ * use.
+ */
+void gigaset_isdn_start(struct cardstate *cs)
+{
+ struct gigaset_capi_ctr *iif = cs->iif;
+
+ /* fill profile data: manufacturer name */
+ strcpy(iif->ctr.manu, "Siemens");
+ /* CAPI and device version */
+ iif->ctr.version.majorversion = 2; /* CAPI 2.0 */
+ iif->ctr.version.minorversion = 0;
+ /* ToDo: check/assert cs->gotfwver? */
+ iif->ctr.version.majormanuversion = cs->fwver[0];
+ iif->ctr.version.minormanuversion = cs->fwver[1];
+ /* number of B channels supported */
+ iif->ctr.profile.nbchannel = cs->channels;
+ /* global options: internal controller, supplementary services */
+ iif->ctr.profile.goptions = 0x11;
+ /* B1 protocols: 64 kbit/s HDLC or transparent */
+ iif->ctr.profile.support1 = 0x03;
+ /* B2 protocols: transparent only */
+ /* ToDo: X.75 SLP ? */
+ iif->ctr.profile.support2 = 0x02;
+ /* B3 protocols: transparent only */
+ iif->ctr.profile.support3 = 0x01;
+ /* no serial number */
+ strcpy(iif->ctr.serial, "0");
+ capi_ctr_ready(&iif->ctr);
+}
+
+/**
+ * gigaset_isdn_stop() - signal device unavailability
+ * @cs: device descriptor structure.
+ *
+ * Called by main module to notify the LL that the device is no longer
+ * available for use.
+ */
+void gigaset_isdn_stop(struct cardstate *cs)
+{
+ struct gigaset_capi_ctr *iif = cs->iif;
+ capi_ctr_down(&iif->ctr);
+}
+
+/*
+ * kernel CAPI callback methods
+ * ============================
+ */
+
+/*
+ * register CAPI application
+ */
+static void gigaset_register_appl(struct capi_ctr *ctr, u16 appl,
+ capi_register_params *rp)
+{
+ struct gigaset_capi_ctr *iif
+ = container_of(ctr, struct gigaset_capi_ctr, ctr);
+ struct cardstate *cs = ctr->driverdata;
+ struct gigaset_capi_appl *ap;
+
+ gig_dbg(DEBUG_CMD, "%s [%u] l3cnt=%u blkcnt=%u blklen=%u",
+ __func__, appl, rp->level3cnt, rp->datablkcnt, rp->datablklen);
+
+ list_for_each_entry(ap, &iif->appls, ctrlist)
+ if (ap->id == appl) {
+ dev_notice(cs->dev,
+ "application %u already registered\n", appl);
+ return;
+ }
+
+ ap = kzalloc(sizeof(*ap), GFP_KERNEL);
+ if (!ap) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ ap->id = appl;
+ ap->rp = *rp;
+
+ list_add(&ap->ctrlist, &iif->appls);
+ dev_info(cs->dev, "application %u registered\n", ap->id);
+}
+
+/*
+ * remove CAPI application from channel
+ * helper function to keep indentation levels down and stay in 80 columns
+ */
+
+static inline void remove_appl_from_channel(struct bc_state *bcs,
+ struct gigaset_capi_appl *ap)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_appl *bcap;
+ unsigned long flags;
+ int prevconnstate;
+
+ spin_lock_irqsave(&bcs->aplock, flags);
+ bcap = bcs->ap;
+ if (bcap == NULL) {
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ return;
+ }
+
+ /* check first application on channel */
+ if (bcap == ap) {
+ bcs->ap = ap->bcnext;
+ if (bcs->ap != NULL) {
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ return;
+ }
+
+ /* none left, clear channel state */
+ prevconnstate = bcs->apconnstate;
+ bcs->apconnstate = APCONN_NONE;
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+
+ if (prevconnstate == APCONN_ACTIVE) {
+ dev_notice(cs->dev, "%s: hanging up channel %u\n",
+ __func__, bcs->channel);
+ gigaset_add_event(cs, &bcs->at_state,
+ EV_HUP, NULL, 0, NULL);
+ gigaset_schedule_event(cs);
+ }
+ return;
+ }
+
+ /* check remaining list */
+ do {
+ if (bcap->bcnext == ap) {
+ bcap->bcnext = bcap->bcnext->bcnext;
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ return;
+ }
+ bcap = bcap->bcnext;
+ } while (bcap != NULL);
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+}
+
+/*
+ * release CAPI application
+ */
+static void gigaset_release_appl(struct capi_ctr *ctr, u16 appl)
+{
+ struct gigaset_capi_ctr *iif
+ = container_of(ctr, struct gigaset_capi_ctr, ctr);
+ struct cardstate *cs = iif->ctr.driverdata;
+ struct gigaset_capi_appl *ap, *tmp;
+ unsigned ch;
+
+ gig_dbg(DEBUG_CMD, "%s [%u]", __func__, appl);
+
+ list_for_each_entry_safe(ap, tmp, &iif->appls, ctrlist)
+ if (ap->id == appl) {
+ /* remove from any channels */
+ for (ch = 0; ch < cs->channels; ch++)
+ remove_appl_from_channel(&cs->bcs[ch], ap);
+
+ /* remove from registration list */
+ list_del(&ap->ctrlist);
+ kfree(ap);
+ dev_info(cs->dev, "application %u released\n", appl);
+ }
+}
+
+/*
+ * =====================================================================
+ * outgoing CAPI message handler
+ * =====================================================================
+ */
+
+/*
+ * helper function: emit reply message with given Info value
+ */
+static void send_conf(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb,
+ u16 info)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+
+ /*
+ * _CONF replies always only have NCCI and Info parameters
+ * so they'll fit into the _REQ message skb
+ */
+ capi_cmsg_answer(&iif->acmsg);
+ iif->acmsg.Info = info;
+ if (capi_cmsg2message(&iif->acmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ __skb_trim(skb, CAPI_STDCONF_LEN);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+
+/*
+ * process FACILITY_REQ message
+ */
+static void do_facility_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ _cmsg *cmsg = &iif->acmsg;
+ struct sk_buff *cskb;
+ u8 *pparam;
+ unsigned int msgsize = CAPI_FACILITY_CONF_BASELEN;
+ u16 function, info;
+ static u8 confparam[10]; /* max. 9 octets + length byte */
+
+ /* decode message */
+ if (capi_message2cmsg(cmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, cmsg);
+
+ /*
+ * Facility Request Parameter is not decoded by capi_message2cmsg()
+ * encoding depends on Facility Selector
+ */
+ switch (cmsg->FacilitySelector) {
+ case CAPI_FACILITY_DTMF: /* ToDo */
+ info = CapiFacilityNotSupported;
+ confparam[0] = 2; /* length */
+ /* DTMF information: Unknown DTMF request */
+ capimsg_setu16(confparam, 1, 2);
+ break;
+
+ case CAPI_FACILITY_V42BIS: /* not supported */
+ info = CapiFacilityNotSupported;
+ confparam[0] = 2; /* length */
+ /* V.42 bis information: not available */
+ capimsg_setu16(confparam, 1, 1);
+ break;
+
+ case CAPI_FACILITY_SUPPSVC:
+ /* decode Function parameter */
+ pparam = cmsg->FacilityRequestParameter;
+ if (pparam == NULL || pparam[0] < 2) {
+ dev_notice(cs->dev, "%s: %s missing\n", "FACILITY_REQ",
+ "Facility Request Parameter");
+ send_conf(iif, ap, skb, CapiIllMessageParmCoding);
+ return;
+ }
+ function = CAPIMSG_U16(pparam, 1);
+ switch (function) {
+ case CAPI_SUPPSVC_GETSUPPORTED:
+ info = CapiSuccess;
+ /* Supplementary Service specific parameter */
+ confparam[3] = 6; /* length */
+ /* Supplementary services info: Success */
+ capimsg_setu16(confparam, 4, CapiSuccess);
+ /* Supported Services: none */
+ capimsg_setu32(confparam, 6, 0);
+ break;
+ case CAPI_SUPPSVC_LISTEN:
+ if (pparam[0] < 7 || pparam[3] < 4) {
+ dev_notice(cs->dev, "%s: %s missing\n",
+ "FACILITY_REQ", "Notification Mask");
+ send_conf(iif, ap, skb,
+ CapiIllMessageParmCoding);
+ return;
+ }
+ if (CAPIMSG_U32(pparam, 4) != 0) {
+ dev_notice(cs->dev,
+ "%s: unsupported supplementary service notification mask 0x%x\n",
+ "FACILITY_REQ", CAPIMSG_U32(pparam, 4));
+ info = CapiFacilitySpecificFunctionNotSupported;
+ confparam[3] = 2; /* length */
+ capimsg_setu16(confparam, 4,
+ CapiSupplementaryServiceNotSupported);
+ break;
+ }
+ info = CapiSuccess;
+ confparam[3] = 2; /* length */
+ capimsg_setu16(confparam, 4, CapiSuccess);
+ break;
+
+ /* ToDo: add supported services */
+
+ default:
+ dev_notice(cs->dev,
+ "%s: unsupported supplementary service function 0x%04x\n",
+ "FACILITY_REQ", function);
+ info = CapiFacilitySpecificFunctionNotSupported;
+ /* Supplementary Service specific parameter */
+ confparam[3] = 2; /* length */
+ /* Supplementary services info: not supported */
+ capimsg_setu16(confparam, 4,
+ CapiSupplementaryServiceNotSupported);
+ }
+
+ /* Facility confirmation parameter */
+ confparam[0] = confparam[3] + 3; /* total length */
+ /* Function: copy from _REQ message */
+ capimsg_setu16(confparam, 1, function);
+ /* Supplementary Service specific parameter already set above */
+ break;
+
+ case CAPI_FACILITY_WAKEUP: /* ToDo */
+ info = CapiFacilityNotSupported;
+ confparam[0] = 2; /* length */
+ /* Number of accepted awake request parameters: 0 */
+ capimsg_setu16(confparam, 1, 0);
+ break;
+
+ default:
+ info = CapiFacilityNotSupported;
+ confparam[0] = 0; /* empty struct */
+ }
+
+ /* send FACILITY_CONF with given Info and confirmation parameter */
+ dev_kfree_skb_any(skb);
+ capi_cmsg_answer(cmsg);
+ cmsg->Info = info;
+ cmsg->FacilityConfirmationParameter = confparam;
+ msgsize += confparam[0]; /* length */
+ cskb = alloc_skb(msgsize, GFP_ATOMIC);
+ if (!cskb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ if (capi_cmsg2message(cmsg, __skb_put(cskb, msgsize))) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(cskb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, cmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, cskb);
+}
+
+
+/*
+ * process LISTEN_REQ message
+ * just store the masks in the application data structure
+ */
+static void do_listen_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+
+ /* decode message */
+ if (capi_message2cmsg(&iif->acmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+
+ /* store listening parameters */
+ ap->listenInfoMask = iif->acmsg.InfoMask;
+ ap->listenCIPmask = iif->acmsg.CIPmask;
+ send_conf(iif, ap, skb, CapiSuccess);
+}
+
+/*
+ * process ALERT_REQ message
+ * nothing to do, Gigaset always alerts anyway
+ */
+static void do_alert_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+
+ /* decode message */
+ if (capi_message2cmsg(&iif->acmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+ send_conf(iif, ap, skb, CapiAlertAlreadySent);
+}
+
+/*
+ * process CONNECT_REQ message
+ * allocate a B channel, prepare dial commands, queue a DIAL event,
+ * emit CONNECT_CONF reply
+ */
+static void do_connect_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ _cmsg *cmsg = &iif->acmsg;
+ struct bc_state *bcs;
+ char **commands;
+ char *s;
+ u8 *pp;
+ unsigned long flags;
+ int i, l, lbc, lhlc;
+ u16 info;
+
+ /* decode message */
+ if (capi_message2cmsg(cmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, cmsg);
+
+ /* get free B channel & construct PLCI */
+ bcs = gigaset_get_free_channel(cs);
+ if (!bcs) {
+ dev_notice(cs->dev, "%s: no B channel available\n",
+ "CONNECT_REQ");
+ send_conf(iif, ap, skb, CapiNoPlciAvailable);
+ return;
+ }
+ spin_lock_irqsave(&bcs->aplock, flags);
+ if (bcs->ap != NULL || bcs->apconnstate != APCONN_NONE)
+ dev_warn(cs->dev, "%s: channel not properly cleared (%p/%d)\n",
+ __func__, bcs->ap, bcs->apconnstate);
+ ap->bcnext = NULL;
+ bcs->ap = ap;
+ bcs->apconnstate = APCONN_SETUP;
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+
+ bcs->rx_bufsize = ap->rp.datablklen;
+ dev_kfree_skb(bcs->rx_skb);
+ gigaset_new_rx_skb(bcs);
+ cmsg->adr.adrPLCI |= (bcs->channel + 1) << 8;
+
+ /* build command table */
+ commands = kcalloc(AT_NUM, sizeof(*commands), GFP_KERNEL);
+ if (!commands)
+ goto oom;
+
+ /* encode parameter: Called party number */
+ pp = cmsg->CalledPartyNumber;
+ if (pp == NULL || *pp == 0) {
+ dev_notice(cs->dev, "%s: %s missing\n",
+ "CONNECT_REQ", "Called party number");
+ info = CapiIllMessageParmCoding;
+ goto error;
+ }
+ l = *pp++;
+ /* check type of number/numbering plan byte */
+ switch (*pp) {
+ case 0x80: /* unknown type / unknown numbering plan */
+ case 0x81: /* unknown type / ISDN/Telephony numbering plan */
+ break;
+ default: /* others: warn about potential misinterpretation */
+ dev_notice(cs->dev, "%s: %s type/plan 0x%02x unsupported\n",
+ "CONNECT_REQ", "Called party number", *pp);
+ }
+ pp++;
+ l--;
+ /* translate "**" internal call prefix to CTP value */
+ if (l >= 2 && pp[0] == '*' && pp[1] == '*') {
+ s = "^SCTP=0\r";
+ pp += 2;
+ l -= 2;
+ } else {
+ s = "^SCTP=1\r";
+ }
+ commands[AT_TYPE] = kstrdup(s, GFP_KERNEL);
+ if (!commands[AT_TYPE])
+ goto oom;
+ commands[AT_DIAL] = kmalloc(l + 3, GFP_KERNEL);
+ if (!commands[AT_DIAL])
+ goto oom;
+ snprintf(commands[AT_DIAL], l + 3, "D%.*s\r", l, pp);
+
+ /* encode parameter: Calling party number */
+ pp = cmsg->CallingPartyNumber;
+ if (pp != NULL && *pp > 0) {
+ l = *pp++;
+
+ /* check type of number/numbering plan byte */
+ /* ToDo: allow for/handle Ext=1? */
+ switch (*pp) {
+ case 0x00: /* unknown type / unknown numbering plan */
+ case 0x01: /* unknown type / ISDN/Telephony num. plan */
+ break;
+ default:
+ dev_notice(cs->dev,
+ "%s: %s type/plan 0x%02x unsupported\n",
+ "CONNECT_REQ", "Calling party number", *pp);
+ }
+ pp++;
+ l--;
+
+ /* check presentation indicator */
+ if (!l) {
+ dev_notice(cs->dev, "%s: %s IE truncated\n",
+ "CONNECT_REQ", "Calling party number");
+ info = CapiIllMessageParmCoding;
+ goto error;
+ }
+ switch (*pp & 0xfc) { /* ignore Screening indicator */
+ case 0x80: /* Presentation allowed */
+ s = "^SCLIP=1\r";
+ break;
+ case 0xa0: /* Presentation restricted */
+ s = "^SCLIP=0\r";
+ break;
+ default:
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "CONNECT_REQ",
+ "Presentation/Screening indicator",
+ *pp);
+ s = "^SCLIP=1\r";
+ }
+ commands[AT_CLIP] = kstrdup(s, GFP_KERNEL);
+ if (!commands[AT_CLIP])
+ goto oom;
+ pp++;
+ l--;
+
+ if (l) {
+ /* number */
+ commands[AT_MSN] = kmalloc(l + 8, GFP_KERNEL);
+ if (!commands[AT_MSN])
+ goto oom;
+ snprintf(commands[AT_MSN], l + 8, "^SMSN=%*s\r", l, pp);
+ }
+ }
+
+ /* check parameter: CIP Value */
+ if (cmsg->CIPValue >= ARRAY_SIZE(cip2bchlc) ||
+ (cmsg->CIPValue > 0 && cip2bchlc[cmsg->CIPValue].bc == NULL)) {
+ dev_notice(cs->dev, "%s: unknown CIP value %d\n",
+ "CONNECT_REQ", cmsg->CIPValue);
+ info = CapiCipValueUnknown;
+ goto error;
+ }
+
+ /*
+ * check/encode parameters: BC & HLC
+ * must be encoded together as device doesn't accept HLC separately
+ * explicit parameters override values derived from CIP
+ */
+
+ /* determine lengths */
+ if (cmsg->BC && cmsg->BC[0]) /* BC specified explicitly */
+ lbc = 2 * cmsg->BC[0];
+ else if (cip2bchlc[cmsg->CIPValue].bc) /* BC derived from CIP */
+ lbc = strlen(cip2bchlc[cmsg->CIPValue].bc);
+ else /* no BC */
+ lbc = 0;
+ if (cmsg->HLC && cmsg->HLC[0]) /* HLC specified explicitly */
+ lhlc = 2 * cmsg->HLC[0];
+ else if (cip2bchlc[cmsg->CIPValue].hlc) /* HLC derived from CIP */
+ lhlc = strlen(cip2bchlc[cmsg->CIPValue].hlc);
+ else /* no HLC */
+ lhlc = 0;
+
+ if (lbc) {
+ /* have BC: allocate and assemble command string */
+ l = lbc + 7; /* "^SBC=" + value + "\r" + null byte */
+ if (lhlc)
+ l += lhlc + 7; /* ";^SHLC=" + value */
+ commands[AT_BC] = kmalloc(l, GFP_KERNEL);
+ if (!commands[AT_BC])
+ goto oom;
+ strcpy(commands[AT_BC], "^SBC=");
+ if (cmsg->BC && cmsg->BC[0]) /* BC specified explicitly */
+ decode_ie(cmsg->BC, commands[AT_BC] + 5);
+ else /* BC derived from CIP */
+ strcpy(commands[AT_BC] + 5,
+ cip2bchlc[cmsg->CIPValue].bc);
+ if (lhlc) {
+ strcpy(commands[AT_BC] + lbc + 5, ";^SHLC=");
+ if (cmsg->HLC && cmsg->HLC[0])
+ /* HLC specified explicitly */
+ decode_ie(cmsg->HLC,
+ commands[AT_BC] + lbc + 12);
+ else /* HLC derived from CIP */
+ strcpy(commands[AT_BC] + lbc + 12,
+ cip2bchlc[cmsg->CIPValue].hlc);
+ }
+ strcpy(commands[AT_BC] + l - 2, "\r");
+ } else {
+ /* no BC */
+ if (lhlc) {
+ dev_notice(cs->dev, "%s: cannot set HLC without BC\n",
+ "CONNECT_REQ");
+ info = CapiIllMessageParmCoding; /* ? */
+ goto error;
+ }
+ }
+
+ /* check/encode parameter: B Protocol */
+ if (cmsg->BProtocol == CAPI_DEFAULT) {
+ bcs->proto2 = L2_HDLC;
+ dev_warn(cs->dev,
+ "B2 Protocol X.75 SLP unsupported, using Transparent\n");
+ } else {
+ switch (cmsg->B1protocol) {
+ case 0:
+ bcs->proto2 = L2_HDLC;
+ break;
+ case 1:
+ bcs->proto2 = L2_VOICE;
+ break;
+ default:
+ dev_warn(cs->dev,
+ "B1 Protocol %u unsupported, using Transparent\n",
+ cmsg->B1protocol);
+ bcs->proto2 = L2_VOICE;
+ }
+ if (cmsg->B2protocol != 1)
+ dev_warn(cs->dev,
+ "B2 Protocol %u unsupported, using Transparent\n",
+ cmsg->B2protocol);
+ if (cmsg->B3protocol != 0)
+ dev_warn(cs->dev,
+ "B3 Protocol %u unsupported, using Transparent\n",
+ cmsg->B3protocol);
+ ignore_cstruct_param(cs, cmsg->B1configuration,
+ "CONNECT_REQ", "B1 Configuration");
+ ignore_cstruct_param(cs, cmsg->B2configuration,
+ "CONNECT_REQ", "B2 Configuration");
+ ignore_cstruct_param(cs, cmsg->B3configuration,
+ "CONNECT_REQ", "B3 Configuration");
+ }
+ commands[AT_PROTO] = kmalloc(9, GFP_KERNEL);
+ if (!commands[AT_PROTO])
+ goto oom;
+ snprintf(commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
+
+ /* ToDo: check/encode remaining parameters */
+ ignore_cstruct_param(cs, cmsg->CalledPartySubaddress,
+ "CONNECT_REQ", "Called pty subaddr");
+ ignore_cstruct_param(cs, cmsg->CallingPartySubaddress,
+ "CONNECT_REQ", "Calling pty subaddr");
+ ignore_cstruct_param(cs, cmsg->LLC,
+ "CONNECT_REQ", "LLC");
+ if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
+ ignore_cstruct_param(cs, cmsg->BChannelinformation,
+ "CONNECT_REQ", "B Channel Information");
+ ignore_cstruct_param(cs, cmsg->Keypadfacility,
+ "CONNECT_REQ", "Keypad Facility");
+ ignore_cstruct_param(cs, cmsg->Useruserdata,
+ "CONNECT_REQ", "User-User Data");
+ ignore_cstruct_param(cs, cmsg->Facilitydataarray,
+ "CONNECT_REQ", "Facility Data Array");
+ }
+
+ /* encode parameter: B channel to use */
+ commands[AT_ISO] = kmalloc(9, GFP_KERNEL);
+ if (!commands[AT_ISO])
+ goto oom;
+ snprintf(commands[AT_ISO], 9, "^SISO=%u\r",
+ (unsigned) bcs->channel + 1);
+
+ /* queue & schedule EV_DIAL event */
+ if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, commands,
+ bcs->at_state.seq_index, NULL)) {
+ info = CAPI_MSGOSRESOURCEERR;
+ goto error;
+ }
+ gigaset_schedule_event(cs);
+ send_conf(iif, ap, skb, CapiSuccess);
+ return;
+
+oom:
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ info = CAPI_MSGOSRESOURCEERR;
+error:
+ if (commands)
+ for (i = 0; i < AT_NUM; i++)
+ kfree(commands[i]);
+ kfree(commands);
+ gigaset_free_channel(bcs);
+ send_conf(iif, ap, skb, info);
+}
+
+/*
+ * process CONNECT_RESP message
+ * checks protocol parameters and queues an ACCEPT or HUP event
+ */
+static void do_connect_resp(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ _cmsg *cmsg = &iif->acmsg;
+ struct bc_state *bcs;
+ struct gigaset_capi_appl *oap;
+ unsigned long flags;
+ int channel;
+
+ /* decode message */
+ if (capi_message2cmsg(cmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, cmsg);
+ dev_kfree_skb_any(skb);
+
+ /* extract and check channel number from PLCI */
+ channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
+ if (!channel || channel > cs->channels) {
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "CONNECT_RESP", "PLCI", cmsg->adr.adrPLCI);
+ return;
+ }
+ bcs = cs->bcs + channel - 1;
+
+ switch (cmsg->Reject) {
+ case 0: /* Accept */
+ /* drop all competing applications, keep only this one */
+ spin_lock_irqsave(&bcs->aplock, flags);
+ while (bcs->ap != NULL) {
+ oap = bcs->ap;
+ bcs->ap = oap->bcnext;
+ if (oap != ap) {
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ send_disconnect_ind(bcs, oap,
+ CapiCallGivenToOtherApplication);
+ spin_lock_irqsave(&bcs->aplock, flags);
+ }
+ }
+ ap->bcnext = NULL;
+ bcs->ap = ap;
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+
+ bcs->rx_bufsize = ap->rp.datablklen;
+ dev_kfree_skb(bcs->rx_skb);
+ gigaset_new_rx_skb(bcs);
+ bcs->chstate |= CHS_NOTIFY_LL;
+
+ /* check/encode B channel protocol */
+ if (cmsg->BProtocol == CAPI_DEFAULT) {
+ bcs->proto2 = L2_HDLC;
+ dev_warn(cs->dev,
+ "B2 Protocol X.75 SLP unsupported, using Transparent\n");
+ } else {
+ switch (cmsg->B1protocol) {
+ case 0:
+ bcs->proto2 = L2_HDLC;
+ break;
+ case 1:
+ bcs->proto2 = L2_VOICE;
+ break;
+ default:
+ dev_warn(cs->dev,
+ "B1 Protocol %u unsupported, using Transparent\n",
+ cmsg->B1protocol);
+ bcs->proto2 = L2_VOICE;
+ }
+ if (cmsg->B2protocol != 1)
+ dev_warn(cs->dev,
+ "B2 Protocol %u unsupported, using Transparent\n",
+ cmsg->B2protocol);
+ if (cmsg->B3protocol != 0)
+ dev_warn(cs->dev,
+ "B3 Protocol %u unsupported, using Transparent\n",
+ cmsg->B3protocol);
+ ignore_cstruct_param(cs, cmsg->B1configuration,
+ "CONNECT_RESP", "B1 Configuration");
+ ignore_cstruct_param(cs, cmsg->B2configuration,
+ "CONNECT_RESP", "B2 Configuration");
+ ignore_cstruct_param(cs, cmsg->B3configuration,
+ "CONNECT_RESP", "B3 Configuration");
+ }
+
+ /* ToDo: check/encode remaining parameters */
+ ignore_cstruct_param(cs, cmsg->ConnectedNumber,
+ "CONNECT_RESP", "Connected Number");
+ ignore_cstruct_param(cs, cmsg->ConnectedSubaddress,
+ "CONNECT_RESP", "Connected Subaddress");
+ ignore_cstruct_param(cs, cmsg->LLC,
+ "CONNECT_RESP", "LLC");
+ if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
+ ignore_cstruct_param(cs, cmsg->BChannelinformation,
+ "CONNECT_RESP", "BChannel Information");
+ ignore_cstruct_param(cs, cmsg->Keypadfacility,
+ "CONNECT_RESP", "Keypad Facility");
+ ignore_cstruct_param(cs, cmsg->Useruserdata,
+ "CONNECT_RESP", "User-User Data");
+ ignore_cstruct_param(cs, cmsg->Facilitydataarray,
+ "CONNECT_RESP", "Facility Data Array");
+ }
+
+ /* Accept call */
+ if (!gigaset_add_event(cs, &cs->bcs[channel - 1].at_state,
+ EV_ACCEPT, NULL, 0, NULL))
+ return;
+ gigaset_schedule_event(cs);
+ return;
+
+ case 1: /* Ignore */
+ /* send DISCONNECT_IND to this application */
+ send_disconnect_ind(bcs, ap, 0);
+
+ /* remove it from the list of listening apps */
+ spin_lock_irqsave(&bcs->aplock, flags);
+ if (bcs->ap == ap) {
+ bcs->ap = ap->bcnext;
+ if (bcs->ap == NULL) {
+ /* last one: stop ev-layer hupD notifications */
+ bcs->apconnstate = APCONN_NONE;
+ bcs->chstate &= ~CHS_NOTIFY_LL;
+ }
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ return;
+ }
+ for (oap = bcs->ap; oap != NULL; oap = oap->bcnext) {
+ if (oap->bcnext == ap) {
+ oap->bcnext = oap->bcnext->bcnext;
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ return;
+ }
+ }
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ dev_err(cs->dev, "%s: application %u not found\n",
+ __func__, ap->id);
+ return;
+
+ default: /* Reject */
+ /* drop all competing applications, keep only this one */
+ spin_lock_irqsave(&bcs->aplock, flags);
+ while (bcs->ap != NULL) {
+ oap = bcs->ap;
+ bcs->ap = oap->bcnext;
+ if (oap != ap) {
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+ send_disconnect_ind(bcs, oap,
+ CapiCallGivenToOtherApplication);
+ spin_lock_irqsave(&bcs->aplock, flags);
+ }
+ }
+ ap->bcnext = NULL;
+ bcs->ap = ap;
+ spin_unlock_irqrestore(&bcs->aplock, flags);
+
+ /* reject call - will trigger DISCONNECT_IND for this app */
+ dev_info(cs->dev, "%s: Reject=%x\n",
+ "CONNECT_RESP", cmsg->Reject);
+ if (!gigaset_add_event(cs, &cs->bcs[channel - 1].at_state,
+ EV_HUP, NULL, 0, NULL))
+ return;
+ gigaset_schedule_event(cs);
+ return;
+ }
+}
+
+/*
+ * process CONNECT_B3_REQ message
+ * build NCCI and emit CONNECT_B3_CONF reply
+ */
+static void do_connect_b3_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ _cmsg *cmsg = &iif->acmsg;
+ struct bc_state *bcs;
+ int channel;
+
+ /* decode message */
+ if (capi_message2cmsg(cmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, cmsg);
+
+ /* extract and check channel number from PLCI */
+ channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
+ if (!channel || channel > cs->channels) {
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "CONNECT_B3_REQ", "PLCI", cmsg->adr.adrPLCI);
+ send_conf(iif, ap, skb, CapiIllContrPlciNcci);
+ return;
+ }
+ bcs = &cs->bcs[channel - 1];
+
+ /* mark logical connection active */
+ bcs->apconnstate = APCONN_ACTIVE;
+
+ /* build NCCI: always 1 (one B3 connection only) */
+ cmsg->adr.adrNCCI |= 1 << 16;
+
+ /* NCPI parameter: not applicable for B3 Transparent */
+ ignore_cstruct_param(cs, cmsg->NCPI, "CONNECT_B3_REQ", "NCPI");
+ send_conf(iif, ap, skb,
+ (cmsg->NCPI && cmsg->NCPI[0]) ?
+ CapiNcpiNotSupportedByProtocol : CapiSuccess);
+}
+
+/*
+ * process CONNECT_B3_RESP message
+ * Depending on the Reject parameter, either emit CONNECT_B3_ACTIVE_IND
+ * or queue EV_HUP and emit DISCONNECT_B3_IND.
+ * The emitted message is always shorter than the received one,
+ * allowing to reuse the skb.
+ */
+static void do_connect_b3_resp(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ _cmsg *cmsg = &iif->acmsg;
+ struct bc_state *bcs;
+ int channel;
+ unsigned int msgsize;
+ u8 command;
+
+ /* decode message */
+ if (capi_message2cmsg(cmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, cmsg);
+
+ /* extract and check channel number and NCCI */
+ channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
+ if (!channel || channel > cs->channels ||
+ ((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "CONNECT_B3_RESP", "NCCI", cmsg->adr.adrNCCI);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ bcs = &cs->bcs[channel - 1];
+
+ if (cmsg->Reject) {
+ /* Reject: clear B3 connect received flag */
+ bcs->apconnstate = APCONN_SETUP;
+
+ /* trigger hangup, causing eventual DISCONNECT_IND */
+ if (!gigaset_add_event(cs, &bcs->at_state,
+ EV_HUP, NULL, 0, NULL)) {
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ gigaset_schedule_event(cs);
+
+ /* emit DISCONNECT_B3_IND */
+ command = CAPI_DISCONNECT_B3;
+ msgsize = CAPI_DISCONNECT_B3_IND_BASELEN;
+ } else {
+ /*
+ * Accept: emit CONNECT_B3_ACTIVE_IND immediately, as
+ * we only send CONNECT_B3_IND if the B channel is up
+ */
+ command = CAPI_CONNECT_B3_ACTIVE;
+ msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
+ }
+ capi_cmsg_header(cmsg, ap->id, command, CAPI_IND,
+ ap->nextMessageNumber++, cmsg->adr.adrNCCI);
+ __skb_trim(skb, msgsize);
+ if (capi_cmsg2message(cmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, cmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+
+/*
+ * process DISCONNECT_REQ message
+ * schedule EV_HUP and emit DISCONNECT_B3_IND if necessary,
+ * emit DISCONNECT_CONF reply
+ */
+static void do_disconnect_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ _cmsg *cmsg = &iif->acmsg;
+ struct bc_state *bcs;
+ _cmsg *b3cmsg;
+ struct sk_buff *b3skb;
+ int channel;
+
+ /* decode message */
+ if (capi_message2cmsg(cmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, cmsg);
+
+ /* extract and check channel number from PLCI */
+ channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
+ if (!channel || channel > cs->channels) {
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "DISCONNECT_REQ", "PLCI", cmsg->adr.adrPLCI);
+ send_conf(iif, ap, skb, CapiIllContrPlciNcci);
+ return;
+ }
+ bcs = cs->bcs + channel - 1;
+
+ /* ToDo: process parameter: Additional info */
+ if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
+ ignore_cstruct_param(cs, cmsg->BChannelinformation,
+ "DISCONNECT_REQ", "B Channel Information");
+ ignore_cstruct_param(cs, cmsg->Keypadfacility,
+ "DISCONNECT_REQ", "Keypad Facility");
+ ignore_cstruct_param(cs, cmsg->Useruserdata,
+ "DISCONNECT_REQ", "User-User Data");
+ ignore_cstruct_param(cs, cmsg->Facilitydataarray,
+ "DISCONNECT_REQ", "Facility Data Array");
+ }
+
+ /* skip if DISCONNECT_IND already sent */
+ if (!bcs->apconnstate)
+ return;
+
+ /* check for active logical connection */
+ if (bcs->apconnstate >= APCONN_ACTIVE) {
+ /* clear it */
+ bcs->apconnstate = APCONN_SETUP;
+
+ /*
+ * emit DISCONNECT_B3_IND with cause 0x3301
+ * use separate cmsg structure, as the content of iif->acmsg
+ * is still needed for creating the _CONF message
+ */
+ b3cmsg = kmalloc(sizeof(*b3cmsg), GFP_KERNEL);
+ if (!b3cmsg) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
+ return;
+ }
+ capi_cmsg_header(b3cmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
+ ap->nextMessageNumber++,
+ cmsg->adr.adrPLCI | (1 << 16));
+ b3cmsg->Reason_B3 = CapiProtocolErrorLayer1;
+ b3skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_KERNEL);
+ if (b3skb == NULL) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
+ kfree(b3cmsg);
+ return;
+ }
+ if (capi_cmsg2message(b3cmsg,
+ __skb_put(b3skb, CAPI_DISCONNECT_B3_IND_BASELEN))) {
+ dev_err(cs->dev, "%s: message parser failure\n",
+ __func__);
+ kfree(b3cmsg);
+ dev_kfree_skb_any(b3skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, b3cmsg);
+ kfree(b3cmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, b3skb);
+ }
+
+ /* trigger hangup, causing eventual DISCONNECT_IND */
+ if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) {
+ send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
+ return;
+ }
+ gigaset_schedule_event(cs);
+
+ /* emit reply */
+ send_conf(iif, ap, skb, CapiSuccess);
+}
+
+/*
+ * process DISCONNECT_B3_REQ message
+ * schedule EV_HUP and emit DISCONNECT_B3_CONF reply
+ */
+static void do_disconnect_b3_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ _cmsg *cmsg = &iif->acmsg;
+ struct bc_state *bcs;
+ int channel;
+
+ /* decode message */
+ if (capi_message2cmsg(cmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, cmsg);
+
+ /* extract and check channel number and NCCI */
+ channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
+ if (!channel || channel > cs->channels ||
+ ((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "DISCONNECT_B3_REQ", "NCCI", cmsg->adr.adrNCCI);
+ send_conf(iif, ap, skb, CapiIllContrPlciNcci);
+ return;
+ }
+ bcs = &cs->bcs[channel - 1];
+
+ /* reject if logical connection not active */
+ if (bcs->apconnstate < APCONN_ACTIVE) {
+ send_conf(iif, ap, skb,
+ CapiMessageNotSupportedInCurrentState);
+ return;
+ }
+
+ /* trigger hangup, causing eventual DISCONNECT_B3_IND */
+ if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) {
+ send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
+ return;
+ }
+ gigaset_schedule_event(cs);
+
+ /* NCPI parameter: not applicable for B3 Transparent */
+ ignore_cstruct_param(cs, cmsg->NCPI,
+ "DISCONNECT_B3_REQ", "NCPI");
+ send_conf(iif, ap, skb,
+ (cmsg->NCPI && cmsg->NCPI[0]) ?
+ CapiNcpiNotSupportedByProtocol : CapiSuccess);
+}
+
+/*
+ * process DATA_B3_REQ message
+ */
+static void do_data_b3_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ struct bc_state *bcs;
+ int channel = CAPIMSG_PLCI_PART(skb->data);
+ u16 ncci = CAPIMSG_NCCI_PART(skb->data);
+ u16 msglen = CAPIMSG_LEN(skb->data);
+ u16 datalen = CAPIMSG_DATALEN(skb->data);
+ u16 flags = CAPIMSG_FLAGS(skb->data);
+ u16 msgid = CAPIMSG_MSGID(skb->data);
+ u16 handle = CAPIMSG_HANDLE_REQ(skb->data);
+
+ /* frequent message, avoid _cmsg overhead */
+ dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
+
+ /* check parameters */
+ if (channel == 0 || channel > cs->channels || ncci != 1) {
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "DATA_B3_REQ", "NCCI", CAPIMSG_NCCI(skb->data));
+ send_conf(iif, ap, skb, CapiIllContrPlciNcci);
+ return;
+ }
+ bcs = &cs->bcs[channel - 1];
+ if (msglen != CAPI_DATA_B3_REQ_LEN && msglen != CAPI_DATA_B3_REQ_LEN64)
+ dev_notice(cs->dev, "%s: unexpected length %d\n",
+ "DATA_B3_REQ", msglen);
+ if (msglen + datalen != skb->len)
+ dev_notice(cs->dev, "%s: length mismatch (%d+%d!=%d)\n",
+ "DATA_B3_REQ", msglen, datalen, skb->len);
+ if (msglen + datalen > skb->len) {
+ /* message too short for announced data length */
+ send_conf(iif, ap, skb, CapiIllMessageParmCoding); /* ? */
+ return;
+ }
+ if (flags & CAPI_FLAGS_RESERVED) {
+ dev_notice(cs->dev, "%s: reserved flags set (%x)\n",
+ "DATA_B3_REQ", flags);
+ send_conf(iif, ap, skb, CapiIllMessageParmCoding);
+ return;
+ }
+
+ /* reject if logical connection not active */
+ if (bcs->apconnstate < APCONN_ACTIVE) {
+ send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
+ return;
+ }
+
+ /* pull CAPI message into link layer header */
+ skb_reset_mac_header(skb);
+ skb->mac_len = msglen;
+ skb_pull(skb, msglen);
+
+ /* pass to device-specific module */
+ if (cs->ops->send_skb(bcs, skb) < 0) {
+ send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
+ return;
+ }
+
+ /*
+ * DATA_B3_CONF will be sent by gigaset_skb_sent() only if "delivery
+ * confirmation" bit is set; otherwise we have to send it now
+ */
+ if (!(flags & CAPI_FLAGS_DELIVERY_CONFIRMATION))
+ send_data_b3_conf(cs, &iif->ctr, ap->id, msgid, channel, handle,
+ flags ? CapiFlagsNotSupportedByProtocol
+ : CAPI_NOERROR);
+}
+
+/*
+ * process RESET_B3_REQ message
+ * just always reply "not supported by current protocol"
+ */
+static void do_reset_b3_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+
+ /* decode message */
+ if (capi_message2cmsg(&iif->acmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+ send_conf(iif, ap, skb,
+ CapiResetProcedureNotSupportedByCurrentProtocol);
+}
+
+/*
+ * unsupported CAPI message handler
+ */
+static void do_unsupported(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+
+ /* decode message */
+ if (capi_message2cmsg(&iif->acmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+ send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
+}
+
+/*
+ * CAPI message handler: no-op
+ */
+static void do_nothing(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+
+ /* decode message */
+ if (capi_message2cmsg(&iif->acmsg, skb->data)) {
+ dev_err(cs->dev, "%s: message parser failure\n", __func__);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+ dev_kfree_skb_any(skb);
+}
+
+static void do_data_b3_resp(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
+ dev_kfree_skb_any(skb);
+}
+
+/* table of outgoing CAPI message handlers with lookup function */
+typedef void (*capi_send_handler_t)(struct gigaset_capi_ctr *,
+ struct gigaset_capi_appl *,
+ struct sk_buff *);
+
+static struct {
+ u16 cmd;
+ capi_send_handler_t handler;
+} capi_send_handler_table[] = {
+ /* most frequent messages first for faster lookup */
+ { CAPI_DATA_B3_REQ, do_data_b3_req },
+ { CAPI_DATA_B3_RESP, do_data_b3_resp },
+
+ { CAPI_ALERT_REQ, do_alert_req },
+ { CAPI_CONNECT_ACTIVE_RESP, do_nothing },
+ { CAPI_CONNECT_B3_ACTIVE_RESP, do_nothing },
+ { CAPI_CONNECT_B3_REQ, do_connect_b3_req },
+ { CAPI_CONNECT_B3_RESP, do_connect_b3_resp },
+ { CAPI_CONNECT_B3_T90_ACTIVE_RESP, do_nothing },
+ { CAPI_CONNECT_REQ, do_connect_req },
+ { CAPI_CONNECT_RESP, do_connect_resp },
+ { CAPI_DISCONNECT_B3_REQ, do_disconnect_b3_req },
+ { CAPI_DISCONNECT_B3_RESP, do_nothing },
+ { CAPI_DISCONNECT_REQ, do_disconnect_req },
+ { CAPI_DISCONNECT_RESP, do_nothing },
+ { CAPI_FACILITY_REQ, do_facility_req },
+ { CAPI_FACILITY_RESP, do_nothing },
+ { CAPI_LISTEN_REQ, do_listen_req },
+ { CAPI_SELECT_B_PROTOCOL_REQ, do_unsupported },
+ { CAPI_RESET_B3_REQ, do_reset_b3_req },
+ { CAPI_RESET_B3_RESP, do_nothing },
+
+ /*
+ * ToDo: support overlap sending (requires ev-layer state
+ * machine extension to generate additional ATD commands)
+ */
+ { CAPI_INFO_REQ, do_unsupported },
+ { CAPI_INFO_RESP, do_nothing },
+
+ /*
+ * ToDo: what's the proper response for these?
+ */
+ { CAPI_MANUFACTURER_REQ, do_nothing },
+ { CAPI_MANUFACTURER_RESP, do_nothing },
+};
+
+/* look up handler */
+static inline capi_send_handler_t lookup_capi_send_handler(const u16 cmd)
+{
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(capi_send_handler_table); i++)
+ if (capi_send_handler_table[i].cmd == cmd)
+ return capi_send_handler_table[i].handler;
+ return NULL;
+}
+
+
+/**
+ * gigaset_send_message() - accept a CAPI message from an application
+ * @ctr: controller descriptor structure.
+ * @skb: CAPI message.
+ *
+ * Return value: CAPI error code
+ * Note: capidrv (and probably others, too) only uses the return value to
+ * decide whether it has to free the skb (only if result != CAPI_NOERROR (0))
+ */
+static u16 gigaset_send_message(struct capi_ctr *ctr, struct sk_buff *skb)
+{
+ struct gigaset_capi_ctr *iif
+ = container_of(ctr, struct gigaset_capi_ctr, ctr);
+ struct cardstate *cs = ctr->driverdata;
+ struct gigaset_capi_appl *ap;
+ capi_send_handler_t handler;
+
+ /* can only handle linear sk_buffs */
+ if (skb_linearize(skb) < 0) {
+ dev_warn(cs->dev, "%s: skb_linearize failed\n", __func__);
+ return CAPI_MSGOSRESOURCEERR;
+ }
+
+ /* retrieve application data structure */
+ ap = get_appl(iif, CAPIMSG_APPID(skb->data));
+ if (!ap) {
+ dev_notice(cs->dev, "%s: application %u not registered\n",
+ __func__, CAPIMSG_APPID(skb->data));
+ return CAPI_ILLAPPNR;
+ }
+
+ /* look up command */
+ handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
+ if (!handler) {
+ /* unknown/unsupported message type */
+ if (printk_ratelimit())
+ dev_notice(cs->dev, "%s: unsupported message %u\n",
+ __func__, CAPIMSG_CMD(skb->data));
+ return CAPI_ILLCMDORSUBCMDORMSGTOSMALL;
+ }
+
+ /* serialize */
+ if (atomic_add_return(1, &iif->sendqlen) > 1) {
+ /* queue behind other messages */
+ skb_queue_tail(&iif->sendqueue, skb);
+ return CAPI_NOERROR;
+ }
+
+ /* process message */
+ handler(iif, ap, skb);
+
+ /* process other messages arrived in the meantime */
+ while (atomic_sub_return(1, &iif->sendqlen) > 0) {
+ skb = skb_dequeue(&iif->sendqueue);
+ if (!skb) {
+ /* should never happen */
+ dev_err(cs->dev, "%s: send queue empty\n", __func__);
+ continue;
+ }
+ ap = get_appl(iif, CAPIMSG_APPID(skb->data));
+ if (!ap) {
+ /* could that happen? */
+ dev_warn(cs->dev, "%s: application %u vanished\n",
+ __func__, CAPIMSG_APPID(skb->data));
+ continue;
+ }
+ handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
+ if (!handler) {
+ /* should never happen */
+ dev_err(cs->dev, "%s: handler %x vanished\n",
+ __func__, CAPIMSG_CMD(skb->data));
+ continue;
+ }
+ handler(iif, ap, skb);
+ }
+
+ return CAPI_NOERROR;
+}
+
+/**
+ * gigaset_procinfo() - build single line description for controller
+ * @ctr: controller descriptor structure.
+ *
+ * Return value: pointer to generated string (null terminated)
+ */
+static char *gigaset_procinfo(struct capi_ctr *ctr)
+{
+ return ctr->name; /* ToDo: more? */
+}
+
+static int gigaset_proc_show(struct seq_file *m, void *v)
+{
+ struct capi_ctr *ctr = m->private;
+ struct cardstate *cs = ctr->driverdata;
+ char *s;
+ int i;
+
+ seq_printf(m, "%-16s %s\n", "name", ctr->name);
+ seq_printf(m, "%-16s %s %s\n", "dev",
+ dev_driver_string(cs->dev), dev_name(cs->dev));
+ seq_printf(m, "%-16s %d\n", "id", cs->myid);
+ if (cs->gotfwver)
+ seq_printf(m, "%-16s %d.%d.%d.%d\n", "firmware",
+ cs->fwver[0], cs->fwver[1], cs->fwver[2], cs->fwver[3]);
+ seq_printf(m, "%-16s %d\n", "channels", cs->channels);
+ seq_printf(m, "%-16s %s\n", "onechannel", cs->onechannel ? "yes" : "no");
+
+ switch (cs->mode) {
+ case M_UNKNOWN:
+ s = "unknown";
+ break;
+ case M_CONFIG:
+ s = "config";
+ break;
+ case M_UNIMODEM:
+ s = "Unimodem";
+ break;
+ case M_CID:
+ s = "CID";
+ break;
+ default:
+ s = "??";
+ }
+ seq_printf(m, "%-16s %s\n", "mode", s);
+
+ switch (cs->mstate) {
+ case MS_UNINITIALIZED:
+ s = "uninitialized";
+ break;
+ case MS_INIT:
+ s = "init";
+ break;
+ case MS_LOCKED:
+ s = "locked";
+ break;
+ case MS_SHUTDOWN:
+ s = "shutdown";
+ break;
+ case MS_RECOVER:
+ s = "recover";
+ break;
+ case MS_READY:
+ s = "ready";
+ break;
+ default:
+ s = "??";
+ }
+ seq_printf(m, "%-16s %s\n", "mstate", s);
+
+ seq_printf(m, "%-16s %s\n", "running", cs->running ? "yes" : "no");
+ seq_printf(m, "%-16s %s\n", "connected", cs->connected ? "yes" : "no");
+ seq_printf(m, "%-16s %s\n", "isdn_up", cs->isdn_up ? "yes" : "no");
+ seq_printf(m, "%-16s %s\n", "cidmode", cs->cidmode ? "yes" : "no");
+
+ for (i = 0; i < cs->channels; i++) {
+ seq_printf(m, "[%d]%-13s %d\n", i, "corrupted",
+ cs->bcs[i].corrupted);
+ seq_printf(m, "[%d]%-13s %d\n", i, "trans_down",
+ cs->bcs[i].trans_down);
+ seq_printf(m, "[%d]%-13s %d\n", i, "trans_up",
+ cs->bcs[i].trans_up);
+ seq_printf(m, "[%d]%-13s %d\n", i, "chstate",
+ cs->bcs[i].chstate);
+ switch (cs->bcs[i].proto2) {
+ case L2_BITSYNC:
+ s = "bitsync";
+ break;
+ case L2_HDLC:
+ s = "HDLC";
+ break;
+ case L2_VOICE:
+ s = "voice";
+ break;
+ default:
+ s = "??";
+ }
+ seq_printf(m, "[%d]%-13s %s\n", i, "proto2", s);
+ }
+ return 0;
+}
+
+/**
+ * gigaset_isdn_regdev() - register device to LL
+ * @cs: device descriptor structure.
+ * @isdnid: device name.
+ *
+ * Return value: 0 on success, error code < 0 on failure
+ */
+int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid)
+{
+ struct gigaset_capi_ctr *iif;
+ int rc;
+
+ iif = kzalloc(sizeof(*iif), GFP_KERNEL);
+ if (!iif) {
+ pr_err("%s: out of memory\n", __func__);
+ return -ENOMEM;
+ }
+
+ /* prepare controller structure */
+ iif->ctr.owner = THIS_MODULE;
+ iif->ctr.driverdata = cs;
+ strncpy(iif->ctr.name, isdnid, sizeof(iif->ctr.name) - 1);
+ iif->ctr.driver_name = "gigaset";
+ iif->ctr.load_firmware = NULL;
+ iif->ctr.reset_ctr = NULL;
+ iif->ctr.register_appl = gigaset_register_appl;
+ iif->ctr.release_appl = gigaset_release_appl;
+ iif->ctr.send_message = gigaset_send_message;
+ iif->ctr.procinfo = gigaset_procinfo;
+ iif->ctr.proc_show = gigaset_proc_show,
+ INIT_LIST_HEAD(&iif->appls);
+ skb_queue_head_init(&iif->sendqueue);
+ atomic_set(&iif->sendqlen, 0);
+
+ /* register controller with CAPI */
+ rc = attach_capi_ctr(&iif->ctr);
+ if (rc) {
+ pr_err("attach_capi_ctr failed (%d)\n", rc);
+ kfree(iif);
+ return rc;
+ }
+
+ cs->iif = iif;
+ cs->hw_hdr_len = CAPI_DATA_B3_REQ_LEN;
+ return 0;
+}
+
+/**
+ * gigaset_isdn_unregdev() - unregister device from LL
+ * @cs: device descriptor structure.
+ */
+void gigaset_isdn_unregdev(struct cardstate *cs)
+{
+ struct gigaset_capi_ctr *iif = cs->iif;
+
+ detach_capi_ctr(&iif->ctr);
+ kfree(iif);
+ cs->iif = NULL;
+}
+
+static struct capi_driver capi_driver_gigaset = {
+ .name = "gigaset",
+ .revision = "1.0",
+};
+
+/**
+ * gigaset_isdn_regdrv() - register driver to LL
+ */
+void gigaset_isdn_regdrv(void)
+{
+ pr_info("Kernel CAPI interface\n");
+ register_capi_driver(&capi_driver_gigaset);
+}
+
+/**
+ * gigaset_isdn_unregdrv() - unregister driver from LL
+ */
+void gigaset_isdn_unregdrv(void)
+{
+ unregister_capi_driver(&capi_driver_gigaset);
+}
--- /dev/null
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
++// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Stuff used by all variants of the driver
+ *
+ * Copyright (c) 2001 by Stefan Eilers,
+ * Hansjoerg Lipp <hjlipp@web.de>,
+ * Tilman Schmidt <tilman@imap.cc>.
+ *
+ * =====================================================================
+ * =====================================================================
+ */
+
+#include "gigaset.h"
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+
+/* Version Information */
+#define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Tilman Schmidt <tilman@imap.cc>, Stefan Eilers"
+#define DRIVER_DESC "Driver for Gigaset 307x"
+
+#ifdef CONFIG_GIGASET_DEBUG
+#define DRIVER_DESC_DEBUG " (debug build)"
+#else
+#define DRIVER_DESC_DEBUG ""
+#endif
+
+/* Module parameters */
+int gigaset_debuglevel;
+EXPORT_SYMBOL_GPL(gigaset_debuglevel);
+module_param_named(debug, gigaset_debuglevel, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "debug level");
+
+/* driver state flags */
+#define VALID_MINOR 0x01
+#define VALID_ID 0x02
+
+/**
+ * gigaset_dbg_buffer() - dump data in ASCII and hex for debugging
+ * @level: debugging level.
+ * @msg: message prefix.
+ * @len: number of bytes to dump.
+ * @buf: data to dump.
+ *
+ * If the current debugging level includes one of the bits set in @level,
+ * @len bytes starting at @buf are logged to dmesg at KERN_DEBUG prio,
+ * prefixed by the text @msg.
+ */
+void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
+ size_t len, const unsigned char *buf)
+{
+ unsigned char outbuf[80];
+ unsigned char c;
+ size_t space = sizeof outbuf - 1;
+ unsigned char *out = outbuf;
+ size_t numin = len;
+
+ while (numin--) {
+ c = *buf++;
+ if (c == '~' || c == '^' || c == '\\') {
+ if (!space--)
+ break;
+ *out++ = '\\';
+ }
+ if (c & 0x80) {
+ if (!space--)
+ break;
+ *out++ = '~';
+ c ^= 0x80;
+ }
+ if (c < 0x20 || c == 0x7f) {
+ if (!space--)
+ break;
+ *out++ = '^';
+ c ^= 0x40;
+ }
+ if (!space--)
+ break;
+ *out++ = c;
+ }
+ *out = 0;
+
+ gig_dbg(level, "%s (%u bytes): %s", msg, (unsigned) len, outbuf);
+}
+EXPORT_SYMBOL_GPL(gigaset_dbg_buffer);
+
+static int setflags(struct cardstate *cs, unsigned flags, unsigned delay)
+{
+ int r;
+
+ r = cs->ops->set_modem_ctrl(cs, cs->control_state, flags);
+ cs->control_state = flags;
+ if (r < 0)
+ return r;
+
+ if (delay) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(delay * HZ / 1000);
+ }
+
+ return 0;
+}
+
+int gigaset_enterconfigmode(struct cardstate *cs)
+{
+ int i, r;
+
+ cs->control_state = TIOCM_RTS;
+
+ r = setflags(cs, TIOCM_DTR, 200);
+ if (r < 0)
+ goto error;
+ r = setflags(cs, 0, 200);
+ if (r < 0)
+ goto error;
+ for (i = 0; i < 5; ++i) {
+ r = setflags(cs, TIOCM_RTS, 100);
+ if (r < 0)
+ goto error;
+ r = setflags(cs, 0, 100);
+ if (r < 0)
+ goto error;
+ }
+ r = setflags(cs, TIOCM_RTS | TIOCM_DTR, 800);
+ if (r < 0)
+ goto error;
+
+ return 0;
+
+error:
+ dev_err(cs->dev, "error %d on setuartbits\n", -r);
+ cs->control_state = TIOCM_RTS | TIOCM_DTR;
+ cs->ops->set_modem_ctrl(cs, 0, TIOCM_RTS | TIOCM_DTR);
+
+ return -1;
+}
+
+static int test_timeout(struct at_state_t *at_state)
+{
+ if (!at_state->timer_expires)
+ return 0;
+
+ if (--at_state->timer_expires) {
+ gig_dbg(DEBUG_MCMD, "decreased timer of %p to %lu",
+ at_state, at_state->timer_expires);
+ return 0;
+ }
+
+ gigaset_add_event(at_state->cs, at_state, EV_TIMEOUT, NULL,
+ at_state->timer_index, NULL);
+ return 1;
+}
+
+static void timer_tick(struct timer_list *t)
+{
+ struct cardstate *cs = from_timer(cs, t, timer);
+ unsigned long flags;
+ unsigned channel;
+ struct at_state_t *at_state;
+ int timeout = 0;
+
+ spin_lock_irqsave(&cs->lock, flags);
+
+ for (channel = 0; channel < cs->channels; ++channel)
+ if (test_timeout(&cs->bcs[channel].at_state))
+ timeout = 1;
+
+ if (test_timeout(&cs->at_state))
+ timeout = 1;
+
+ list_for_each_entry(at_state, &cs->temp_at_states, list)
+ if (test_timeout(at_state))
+ timeout = 1;
+
+ if (cs->running) {
+ mod_timer(&cs->timer, jiffies + msecs_to_jiffies(GIG_TICK));
+ if (timeout) {
+ gig_dbg(DEBUG_EVENT, "scheduling timeout");
+ tasklet_schedule(&cs->event_tasklet);
+ }
+ }
+
+ spin_unlock_irqrestore(&cs->lock, flags);
+}
+
+int gigaset_get_channel(struct bc_state *bcs)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&bcs->cs->lock, flags);
+ if (bcs->use_count || !try_module_get(bcs->cs->driver->owner)) {
+ gig_dbg(DEBUG_CHANNEL, "could not allocate channel %d",
+ bcs->channel);
+ spin_unlock_irqrestore(&bcs->cs->lock, flags);
+ return -EBUSY;
+ }
+ ++bcs->use_count;
+ bcs->busy = 1;
+ gig_dbg(DEBUG_CHANNEL, "allocated channel %d", bcs->channel);
+ spin_unlock_irqrestore(&bcs->cs->lock, flags);
+ return 0;
+}
+
+struct bc_state *gigaset_get_free_channel(struct cardstate *cs)
+{
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&cs->lock, flags);
+ if (!try_module_get(cs->driver->owner)) {
+ gig_dbg(DEBUG_CHANNEL,
+ "could not get module for allocating channel");
+ spin_unlock_irqrestore(&cs->lock, flags);
+ return NULL;
+ }
+ for (i = 0; i < cs->channels; ++i)
+ if (!cs->bcs[i].use_count) {
+ ++cs->bcs[i].use_count;
+ cs->bcs[i].busy = 1;
+ spin_unlock_irqrestore(&cs->lock, flags);
+ gig_dbg(DEBUG_CHANNEL, "allocated channel %d", i);
+ return cs->bcs + i;
+ }
+ module_put(cs->driver->owner);
+ spin_unlock_irqrestore(&cs->lock, flags);
+ gig_dbg(DEBUG_CHANNEL, "no free channel");
+ return NULL;
+}
+
+void gigaset_free_channel(struct bc_state *bcs)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&bcs->cs->lock, flags);
+ if (!bcs->busy) {
+ gig_dbg(DEBUG_CHANNEL, "could not free channel %d",
+ bcs->channel);
+ spin_unlock_irqrestore(&bcs->cs->lock, flags);
+ return;
+ }
+ --bcs->use_count;
+ bcs->busy = 0;
+ module_put(bcs->cs->driver->owner);
+ gig_dbg(DEBUG_CHANNEL, "freed channel %d", bcs->channel);
+ spin_unlock_irqrestore(&bcs->cs->lock, flags);
+}
+
+int gigaset_get_channels(struct cardstate *cs)
+{
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&cs->lock, flags);
+ for (i = 0; i < cs->channels; ++i)
+ if (cs->bcs[i].use_count) {
+ spin_unlock_irqrestore(&cs->lock, flags);
+ gig_dbg(DEBUG_CHANNEL,
+ "could not allocate all channels");
+ return -EBUSY;
+ }
+ for (i = 0; i < cs->channels; ++i)
+ ++cs->bcs[i].use_count;
+ spin_unlock_irqrestore(&cs->lock, flags);
+
+ gig_dbg(DEBUG_CHANNEL, "allocated all channels");
+
+ return 0;
+}
+
+void gigaset_free_channels(struct cardstate *cs)
+{
+ unsigned long flags;
+ int i;
+
+ gig_dbg(DEBUG_CHANNEL, "unblocking all channels");
+ spin_lock_irqsave(&cs->lock, flags);
+ for (i = 0; i < cs->channels; ++i)
+ --cs->bcs[i].use_count;
+ spin_unlock_irqrestore(&cs->lock, flags);
+}
+
+void gigaset_block_channels(struct cardstate *cs)
+{
+ unsigned long flags;
+ int i;
+
+ gig_dbg(DEBUG_CHANNEL, "blocking all channels");
+ spin_lock_irqsave(&cs->lock, flags);
+ for (i = 0; i < cs->channels; ++i)
+ ++cs->bcs[i].use_count;
+ spin_unlock_irqrestore(&cs->lock, flags);
+}
+
+static void clear_events(struct cardstate *cs)
+{
+ struct event_t *ev;
+ unsigned head, tail;
+ unsigned long flags;
+
+ spin_lock_irqsave(&cs->ev_lock, flags);
+
+ head = cs->ev_head;
+ tail = cs->ev_tail;
+
+ while (tail != head) {
+ ev = cs->events + head;
+ kfree(ev->ptr);
+ head = (head + 1) % MAX_EVENTS;
+ }
+
+ cs->ev_head = tail;
+
+ spin_unlock_irqrestore(&cs->ev_lock, flags);
+}
+
+/**
+ * gigaset_add_event() - add event to device event queue
+ * @cs: device descriptor structure.
+ * @at_state: connection state structure.
+ * @type: event type.
+ * @ptr: pointer parameter for event.
+ * @parameter: integer parameter for event.
+ * @arg: pointer parameter for event.
+ *
+ * Allocate an event queue entry from the device's event queue, and set it up
+ * with the parameters given.
+ *
+ * Return value: added event
+ */
+struct event_t *gigaset_add_event(struct cardstate *cs,
+ struct at_state_t *at_state, int type,
+ void *ptr, int parameter, void *arg)
+{
+ unsigned long flags;
+ unsigned next, tail;
+ struct event_t *event = NULL;
+
+ gig_dbg(DEBUG_EVENT, "queueing event %d", type);
+
+ spin_lock_irqsave(&cs->ev_lock, flags);
+
+ tail = cs->ev_tail;
+ next = (tail + 1) % MAX_EVENTS;
+ if (unlikely(next == cs->ev_head))
+ dev_err(cs->dev, "event queue full\n");
+ else {
+ event = cs->events + tail;
+ event->type = type;
+ event->at_state = at_state;
+ event->cid = -1;
+ event->ptr = ptr;
+ event->arg = arg;
+ event->parameter = parameter;
+ cs->ev_tail = next;
+ }
+
+ spin_unlock_irqrestore(&cs->ev_lock, flags);
+
+ return event;
+}
+EXPORT_SYMBOL_GPL(gigaset_add_event);
+
+static void clear_at_state(struct at_state_t *at_state)
+{
+ int i;
+
+ for (i = 0; i < STR_NUM; ++i) {
+ kfree(at_state->str_var[i]);
+ at_state->str_var[i] = NULL;
+ }
+}
+
+static void dealloc_temp_at_states(struct cardstate *cs)
+{
+ struct at_state_t *cur, *next;
+
+ list_for_each_entry_safe(cur, next, &cs->temp_at_states, list) {
+ list_del(&cur->list);
+ clear_at_state(cur);
+ kfree(cur);
+ }
+}
+
+static void gigaset_freebcs(struct bc_state *bcs)
+{
+ int i;
+
+ gig_dbg(DEBUG_INIT, "freeing bcs[%d]->hw", bcs->channel);
+ bcs->cs->ops->freebcshw(bcs);
+
+ gig_dbg(DEBUG_INIT, "clearing bcs[%d]->at_state", bcs->channel);
+ clear_at_state(&bcs->at_state);
+ gig_dbg(DEBUG_INIT, "freeing bcs[%d]->skb", bcs->channel);
+ dev_kfree_skb(bcs->rx_skb);
+ bcs->rx_skb = NULL;
+
+ for (i = 0; i < AT_NUM; ++i) {
+ kfree(bcs->commands[i]);
+ bcs->commands[i] = NULL;
+ }
+}
+
+static struct cardstate *alloc_cs(struct gigaset_driver *drv)
+{
+ unsigned long flags;
+ unsigned i;
+ struct cardstate *cs;
+ struct cardstate *ret = NULL;
+
+ spin_lock_irqsave(&drv->lock, flags);
+ if (drv->blocked)
+ goto exit;
+ for (i = 0; i < drv->minors; ++i) {
+ cs = drv->cs + i;
+ if (!(cs->flags & VALID_MINOR)) {
+ cs->flags = VALID_MINOR;
+ ret = cs;
+ break;
+ }
+ }
+exit:
+ spin_unlock_irqrestore(&drv->lock, flags);
+ return ret;
+}
+
+static void free_cs(struct cardstate *cs)
+{
+ cs->flags = 0;
+}
+
+static void make_valid(struct cardstate *cs, unsigned mask)
+{
+ unsigned long flags;
+ struct gigaset_driver *drv = cs->driver;
+ spin_lock_irqsave(&drv->lock, flags);
+ cs->flags |= mask;
+ spin_unlock_irqrestore(&drv->lock, flags);
+}
+
+static void make_invalid(struct cardstate *cs, unsigned mask)
+{
+ unsigned long flags;
+ struct gigaset_driver *drv = cs->driver;
+ spin_lock_irqsave(&drv->lock, flags);
+ cs->flags &= ~mask;
+ spin_unlock_irqrestore(&drv->lock, flags);
+}
+
+/**
+ * gigaset_freecs() - free all associated ressources of a device
+ * @cs: device descriptor structure.
+ *
+ * Stops all tasklets and timers, unregisters the device from all
+ * subsystems it was registered to, deallocates the device structure
+ * @cs and all structures referenced from it.
+ * Operations on the device should be stopped before calling this.
+ */
+void gigaset_freecs(struct cardstate *cs)
+{
+ int i;
+ unsigned long flags;
+
+ if (!cs)
+ return;
+
+ mutex_lock(&cs->mutex);
+
+ spin_lock_irqsave(&cs->lock, flags);
+ cs->running = 0;
+ spin_unlock_irqrestore(&cs->lock, flags); /* event handler and timer are
+ not rescheduled below */
+
+ tasklet_kill(&cs->event_tasklet);
+ del_timer_sync(&cs->timer);
+
+ switch (cs->cs_init) {
+ default:
+ /* clear B channel structures */
+ for (i = 0; i < cs->channels; ++i) {
+ gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i);
+ gigaset_freebcs(cs->bcs + i);
+ }
+
+ /* clear device sysfs */
+ gigaset_free_dev_sysfs(cs);
+
+ gigaset_if_free(cs);
+
+ gig_dbg(DEBUG_INIT, "clearing hw");
+ cs->ops->freecshw(cs);
+
+ /* fall through */
+ case 2: /* error in initcshw */
+ /* Deregister from LL */
+ make_invalid(cs, VALID_ID);
+ gigaset_isdn_unregdev(cs);
+
+ /* fall through */
+ case 1: /* error when registering to LL */
+ gig_dbg(DEBUG_INIT, "clearing at_state");
+ clear_at_state(&cs->at_state);
+ dealloc_temp_at_states(cs);
+ clear_events(cs);
+ tty_port_destroy(&cs->port);
+
+ /* fall through */
+ case 0: /* error in basic setup */
+ gig_dbg(DEBUG_INIT, "freeing inbuf");
+ kfree(cs->inbuf);
+ kfree(cs->bcs);
+ }
+
+ mutex_unlock(&cs->mutex);
+ free_cs(cs);
+}
+EXPORT_SYMBOL_GPL(gigaset_freecs);
+
+void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
+ struct cardstate *cs, int cid)
+{
+ int i;
+
+ INIT_LIST_HEAD(&at_state->list);
+ at_state->waiting = 0;
+ at_state->getstring = 0;
+ at_state->pending_commands = 0;
+ at_state->timer_expires = 0;
+ at_state->timer_active = 0;
+ at_state->timer_index = 0;
+ at_state->seq_index = 0;
+ at_state->ConState = 0;
+ for (i = 0; i < STR_NUM; ++i)
+ at_state->str_var[i] = NULL;
+ at_state->int_var[VAR_ZDLE] = 0;
+ at_state->int_var[VAR_ZCTP] = -1;
+ at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
+ at_state->cs = cs;
+ at_state->bcs = bcs;
+ at_state->cid = cid;
+ if (!cid)
+ at_state->replystruct = cs->tabnocid;
+ else
+ at_state->replystruct = cs->tabcid;
+}
+
+
+static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct cardstate *cs)
+/* inbuf->read must be allocated before! */
+{
+ inbuf->head = 0;
+ inbuf->tail = 0;
+ inbuf->cs = cs;
+ inbuf->inputstate = INS_command;
+}
+
+/**
+ * gigaset_fill_inbuf() - append received data to input buffer
+ * @inbuf: buffer structure.
+ * @src: received data.
+ * @numbytes: number of bytes received.
+ *
+ * Return value: !=0 if some data was appended
+ */
+int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
+ unsigned numbytes)
+{
+ unsigned n, head, tail, bytesleft;
+
+ gig_dbg(DEBUG_INTR, "received %u bytes", numbytes);
+
+ if (!numbytes)
+ return 0;
+
+ bytesleft = numbytes;
+ tail = inbuf->tail;
+ head = inbuf->head;
+ gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail);
+
+ while (bytesleft) {
+ if (head > tail)
+ n = head - 1 - tail;
+ else if (head == 0)
+ n = (RBUFSIZE - 1) - tail;
+ else
+ n = RBUFSIZE - tail;
+ if (!n) {
+ dev_err(inbuf->cs->dev,
+ "buffer overflow (%u bytes lost)\n",
+ bytesleft);
+ break;
+ }
+ if (n > bytesleft)
+ n = bytesleft;
+ memcpy(inbuf->data + tail, src, n);
+ bytesleft -= n;
+ tail = (tail + n) % RBUFSIZE;
+ src += n;
+ }
+ gig_dbg(DEBUG_INTR, "setting tail to %u", tail);
+ inbuf->tail = tail;
+ return numbytes != bytesleft;
+}
+EXPORT_SYMBOL_GPL(gigaset_fill_inbuf);
+
+/* Initialize the b-channel structure */
+static int gigaset_initbcs(struct bc_state *bcs, struct cardstate *cs,
+ int channel)
+{
+ int i;
+
+ bcs->tx_skb = NULL;
+
+ skb_queue_head_init(&bcs->squeue);
+
+ bcs->corrupted = 0;
+ bcs->trans_down = 0;
+ bcs->trans_up = 0;
+
+ gig_dbg(DEBUG_INIT, "setting up bcs[%d]->at_state", channel);
+ gigaset_at_init(&bcs->at_state, bcs, cs, -1);
+
+#ifdef CONFIG_GIGASET_DEBUG
+ bcs->emptycount = 0;
+#endif
+
+ bcs->rx_bufsize = 0;
+ bcs->rx_skb = NULL;
+ bcs->rx_fcs = PPP_INITFCS;
+ bcs->inputstate = 0;
+ bcs->channel = channel;
+ bcs->cs = cs;
+
+ bcs->chstate = 0;
+ bcs->use_count = 1;
+ bcs->busy = 0;
+ bcs->ignore = cs->ignoreframes;
+
+ for (i = 0; i < AT_NUM; ++i)
+ bcs->commands[i] = NULL;
+
+ spin_lock_init(&bcs->aplock);
+ bcs->ap = NULL;
+ bcs->apconnstate = 0;
+
+ gig_dbg(DEBUG_INIT, " setting up bcs[%d]->hw", channel);
+ return cs->ops->initbcshw(bcs);
+}
+
+/**
+ * gigaset_initcs() - initialize device structure
+ * @drv: hardware driver the device belongs to
+ * @channels: number of B channels supported by device
+ * @onechannel: !=0 if B channel data and AT commands share one
+ * communication channel (M10x),
+ * ==0 if B channels have separate communication channels (base)
+ * @ignoreframes: number of frames to ignore after setting up B channel
+ * @cidmode: !=0: start in CallID mode
+ * @modulename: name of driver module for LL registration
+ *
+ * Allocate and initialize cardstate structure for Gigaset driver
+ * Calls hardware dependent gigaset_initcshw() function
+ * Calls B channel initialization function gigaset_initbcs() for each B channel
+ *
+ * Return value:
+ * pointer to cardstate structure
+ */
+struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
+ int onechannel, int ignoreframes,
+ int cidmode, const char *modulename)
+{
+ struct cardstate *cs;
+ unsigned long flags;
+ int i;
+
+ gig_dbg(DEBUG_INIT, "allocating cs");
+ cs = alloc_cs(drv);
+ if (!cs) {
+ pr_err("maximum number of devices exceeded\n");
+ return NULL;
+ }
+
+ cs->cs_init = 0;
+ cs->channels = channels;
+ cs->onechannel = onechannel;
+ cs->ignoreframes = ignoreframes;
+ INIT_LIST_HEAD(&cs->temp_at_states);
+ cs->running = 0;
+ timer_setup(&cs->timer, timer_tick, 0);
+ spin_lock_init(&cs->ev_lock);
+ cs->ev_tail = 0;
+ cs->ev_head = 0;
+
+ tasklet_init(&cs->event_tasklet, gigaset_handle_event,
+ (unsigned long) cs);
+ tty_port_init(&cs->port);
+ cs->commands_pending = 0;
+ cs->cur_at_seq = 0;
+ cs->gotfwver = -1;
+ cs->dev = NULL;
+ cs->tty_dev = NULL;
+ cs->cidmode = cidmode != 0;
+ cs->tabnocid = gigaset_tab_nocid;
+ cs->tabcid = gigaset_tab_cid;
+
+ init_waitqueue_head(&cs->waitqueue);
+ cs->waiting = 0;
+
+ cs->mode = M_UNKNOWN;
+ cs->mstate = MS_UNINITIALIZED;
+
+ cs->bcs = kmalloc_array(channels, sizeof(struct bc_state), GFP_KERNEL);
+ cs->inbuf = kmalloc(sizeof(struct inbuf_t), GFP_KERNEL);
+ if (!cs->bcs || !cs->inbuf) {
+ pr_err("out of memory\n");
+ goto error;
+ }
+ ++cs->cs_init;
+
+ gig_dbg(DEBUG_INIT, "setting up at_state");
+ spin_lock_init(&cs->lock);
+ gigaset_at_init(&cs->at_state, NULL, cs, 0);
+ cs->dle = 0;
+ cs->cbytes = 0;
+
+ gig_dbg(DEBUG_INIT, "setting up inbuf");
+ gigaset_inbuf_init(cs->inbuf, cs);
+
+ cs->connected = 0;
+ cs->isdn_up = 0;
+
+ gig_dbg(DEBUG_INIT, "setting up cmdbuf");
+ cs->cmdbuf = cs->lastcmdbuf = NULL;
+ spin_lock_init(&cs->cmdlock);
+ cs->curlen = 0;
+ cs->cmdbytes = 0;
+
+ gig_dbg(DEBUG_INIT, "setting up iif");
+ if (gigaset_isdn_regdev(cs, modulename) < 0) {
+ pr_err("error registering ISDN device\n");
+ goto error;
+ }
+
+ make_valid(cs, VALID_ID);
+ ++cs->cs_init;
+ gig_dbg(DEBUG_INIT, "setting up hw");
+ if (cs->ops->initcshw(cs) < 0)
+ goto error;
+
+ ++cs->cs_init;
+
+ /* set up character device */
+ gigaset_if_init(cs);
+
+ /* set up device sysfs */
+ gigaset_init_dev_sysfs(cs);
+
+ /* set up channel data structures */
+ for (i = 0; i < channels; ++i) {
+ gig_dbg(DEBUG_INIT, "setting up bcs[%d]", i);
+ if (gigaset_initbcs(cs->bcs + i, cs, i) < 0) {
+ pr_err("could not allocate channel %d data\n", i);
+ goto error;
+ }
+ }
+
+ spin_lock_irqsave(&cs->lock, flags);
+ cs->running = 1;
+ spin_unlock_irqrestore(&cs->lock, flags);
+ cs->timer.expires = jiffies + msecs_to_jiffies(GIG_TICK);
+ add_timer(&cs->timer);
+
+ gig_dbg(DEBUG_INIT, "cs initialized");
+ return cs;
+
+error:
+ gig_dbg(DEBUG_INIT, "failed");
+ gigaset_freecs(cs);
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(gigaset_initcs);
+
+/* ReInitialize the b-channel structure on hangup */
+void gigaset_bcs_reinit(struct bc_state *bcs)
+{
+ struct sk_buff *skb;
+ struct cardstate *cs = bcs->cs;
+ unsigned long flags;
+
+ while ((skb = skb_dequeue(&bcs->squeue)) != NULL)
+ dev_kfree_skb(skb);
+
+ spin_lock_irqsave(&cs->lock, flags);
+ clear_at_state(&bcs->at_state);
+ bcs->at_state.ConState = 0;
+ bcs->at_state.timer_active = 0;
+ bcs->at_state.timer_expires = 0;
+ bcs->at_state.cid = -1; /* No CID defined */
+ spin_unlock_irqrestore(&cs->lock, flags);
+
+ bcs->inputstate = 0;
+
+#ifdef CONFIG_GIGASET_DEBUG
+ bcs->emptycount = 0;
+#endif
+
+ bcs->rx_fcs = PPP_INITFCS;
+ bcs->chstate = 0;
+
+ bcs->ignore = cs->ignoreframes;
+ dev_kfree_skb(bcs->rx_skb);
+ bcs->rx_skb = NULL;
+
+ cs->ops->reinitbcshw(bcs);
+}
+
+static void cleanup_cs(struct cardstate *cs)
+{
+ struct cmdbuf_t *cb, *tcb;
+ int i;
+ unsigned long flags;
+
+ spin_lock_irqsave(&cs->lock, flags);
+
+ cs->mode = M_UNKNOWN;
+ cs->mstate = MS_UNINITIALIZED;
+
+ clear_at_state(&cs->at_state);
+ dealloc_temp_at_states(cs);
+ gigaset_at_init(&cs->at_state, NULL, cs, 0);
+
+ cs->inbuf->inputstate = INS_command;
+ cs->inbuf->head = 0;
+ cs->inbuf->tail = 0;
+
+ cb = cs->cmdbuf;
+ while (cb) {
+ tcb = cb;
+ cb = cb->next;
+ kfree(tcb);
+ }
+ cs->cmdbuf = cs->lastcmdbuf = NULL;
+ cs->curlen = 0;
+ cs->cmdbytes = 0;
+ cs->gotfwver = -1;
+ cs->dle = 0;
+ cs->cur_at_seq = 0;
+ cs->commands_pending = 0;
+ cs->cbytes = 0;
+
+ spin_unlock_irqrestore(&cs->lock, flags);
+
+ for (i = 0; i < cs->channels; ++i) {
+ gigaset_freebcs(cs->bcs + i);
+ if (gigaset_initbcs(cs->bcs + i, cs, i) < 0)
+ pr_err("could not allocate channel %d data\n", i);
+ }
+
+ if (cs->waiting) {
+ cs->cmd_result = -ENODEV;
+ cs->waiting = 0;
+ wake_up_interruptible(&cs->waitqueue);
+ }
+}
+
+
+/**
+ * gigaset_start() - start device operations
+ * @cs: device descriptor structure.
+ *
+ * Prepares the device for use by setting up communication parameters,
+ * scheduling an EV_START event to initiate device initialization, and
+ * waiting for completion of the initialization.
+ *
+ * Return value:
+ * 0 on success, error code < 0 on failure
+ */
+int gigaset_start(struct cardstate *cs)
+{
+ unsigned long flags;
+
+ if (mutex_lock_interruptible(&cs->mutex))
+ return -EBUSY;
+
+ spin_lock_irqsave(&cs->lock, flags);
+ cs->connected = 1;
+ spin_unlock_irqrestore(&cs->lock, flags);
+
+ if (cs->mstate != MS_LOCKED) {
+ cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR | TIOCM_RTS);
+ cs->ops->baud_rate(cs, B115200);
+ cs->ops->set_line_ctrl(cs, CS8);
+ cs->control_state = TIOCM_DTR | TIOCM_RTS;
+ }
+
+ cs->waiting = 1;
+
+ if (!gigaset_add_event(cs, &cs->at_state, EV_START, NULL, 0, NULL)) {
+ cs->waiting = 0;
+ goto error;
+ }
+ gigaset_schedule_event(cs);
+
+ wait_event(cs->waitqueue, !cs->waiting);
+
+ mutex_unlock(&cs->mutex);
+ return 0;
+
+error:
+ mutex_unlock(&cs->mutex);
+ return -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(gigaset_start);
+
+/**
+ * gigaset_shutdown() - shut down device operations
+ * @cs: device descriptor structure.
+ *
+ * Deactivates the device by scheduling an EV_SHUTDOWN event and
+ * waiting for completion of the shutdown.
+ *
+ * Return value:
+ * 0 - success, -ENODEV - error (no device associated)
+ */
+int gigaset_shutdown(struct cardstate *cs)
+{
+ mutex_lock(&cs->mutex);
+
+ if (!(cs->flags & VALID_MINOR)) {
+ mutex_unlock(&cs->mutex);
+ return -ENODEV;
+ }
+
+ cs->waiting = 1;
+
+ if (!gigaset_add_event(cs, &cs->at_state, EV_SHUTDOWN, NULL, 0, NULL))
+ goto exit;
+ gigaset_schedule_event(cs);
+
+ wait_event(cs->waitqueue, !cs->waiting);
+
+ cleanup_cs(cs);
+
+exit:
+ mutex_unlock(&cs->mutex);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(gigaset_shutdown);
+
+/**
+ * gigaset_stop() - stop device operations
+ * @cs: device descriptor structure.
+ *
+ * Stops operations on the device by scheduling an EV_STOP event and
+ * waiting for completion of the shutdown.
+ */
+void gigaset_stop(struct cardstate *cs)
+{
+ mutex_lock(&cs->mutex);
+
+ cs->waiting = 1;
+
+ if (!gigaset_add_event(cs, &cs->at_state, EV_STOP, NULL, 0, NULL))
+ goto exit;
+ gigaset_schedule_event(cs);
+
+ wait_event(cs->waitqueue, !cs->waiting);
+
+ cleanup_cs(cs);
+
+exit:
+ mutex_unlock(&cs->mutex);
+}
+EXPORT_SYMBOL_GPL(gigaset_stop);
+
+static LIST_HEAD(drivers);
+static DEFINE_SPINLOCK(driver_lock);
+
+struct cardstate *gigaset_get_cs_by_id(int id)
+{
+ unsigned long flags;
+ struct cardstate *ret = NULL;
+ struct cardstate *cs;
+ struct gigaset_driver *drv;
+ unsigned i;
+
+ spin_lock_irqsave(&driver_lock, flags);
+ list_for_each_entry(drv, &drivers, list) {
+ spin_lock(&drv->lock);
+ for (i = 0; i < drv->minors; ++i) {
+ cs = drv->cs + i;
+ if ((cs->flags & VALID_ID) && cs->myid == id) {
+ ret = cs;
+ break;
+ }
+ }
+ spin_unlock(&drv->lock);
+ if (ret)
+ break;
+ }
+ spin_unlock_irqrestore(&driver_lock, flags);
+ return ret;
+}
+
+static struct cardstate *gigaset_get_cs_by_minor(unsigned minor)
+{
+ unsigned long flags;
+ struct cardstate *ret = NULL;
+ struct gigaset_driver *drv;
+ unsigned index;
+
+ spin_lock_irqsave(&driver_lock, flags);
+ list_for_each_entry(drv, &drivers, list) {
+ if (minor < drv->minor || minor >= drv->minor + drv->minors)
+ continue;
+ index = minor - drv->minor;
+ spin_lock(&drv->lock);
+ if (drv->cs[index].flags & VALID_MINOR)
+ ret = drv->cs + index;
+ spin_unlock(&drv->lock);
+ if (ret)
+ break;
+ }
+ spin_unlock_irqrestore(&driver_lock, flags);
+ return ret;
+}
+
+struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty)
+{
+ return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start);
+}
+
+/**
+ * gigaset_freedriver() - free all associated ressources of a driver
+ * @drv: driver descriptor structure.
+ *
+ * Unregisters the driver from the system and deallocates the driver
+ * structure @drv and all structures referenced from it.
+ * All devices should be shut down before calling this.
+ */
+void gigaset_freedriver(struct gigaset_driver *drv)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&driver_lock, flags);
+ list_del(&drv->list);
+ spin_unlock_irqrestore(&driver_lock, flags);
+
+ gigaset_if_freedriver(drv);
+
+ kfree(drv->cs);
+ kfree(drv);
+}
+EXPORT_SYMBOL_GPL(gigaset_freedriver);
+
+/**
+ * gigaset_initdriver() - initialize driver structure
+ * @minor: First minor number
+ * @minors: Number of minors this driver can handle
+ * @procname: Name of the driver
+ * @devname: Name of the device files (prefix without minor number)
+ *
+ * Allocate and initialize gigaset_driver structure. Initialize interface.
+ *
+ * Return value:
+ * Pointer to the gigaset_driver structure on success, NULL on failure.
+ */
+struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
+ const char *procname,
+ const char *devname,
+ const struct gigaset_ops *ops,
+ struct module *owner)
+{
+ struct gigaset_driver *drv;
+ unsigned long flags;
+ unsigned i;
+
+ drv = kmalloc(sizeof *drv, GFP_KERNEL);
+ if (!drv)
+ return NULL;
+
+ drv->have_tty = 0;
+ drv->minor = minor;
+ drv->minors = minors;
+ spin_lock_init(&drv->lock);
+ drv->blocked = 0;
+ drv->ops = ops;
+ drv->owner = owner;
+ INIT_LIST_HEAD(&drv->list);
+
+ drv->cs = kmalloc_array(minors, sizeof(*drv->cs), GFP_KERNEL);
+ if (!drv->cs)
+ goto error;
+
+ for (i = 0; i < minors; ++i) {
+ drv->cs[i].flags = 0;
+ drv->cs[i].driver = drv;
+ drv->cs[i].ops = drv->ops;
+ drv->cs[i].minor_index = i;
+ mutex_init(&drv->cs[i].mutex);
+ }
+
+ gigaset_if_initdriver(drv, procname, devname);
+
+ spin_lock_irqsave(&driver_lock, flags);
+ list_add(&drv->list, &drivers);
+ spin_unlock_irqrestore(&driver_lock, flags);
+
+ return drv;
+
+error:
+ kfree(drv);
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(gigaset_initdriver);
+
+/**
+ * gigaset_blockdriver() - block driver
+ * @drv: driver descriptor structure.
+ *
+ * Prevents the driver from attaching new devices, in preparation for
+ * deregistration.
+ */
+void gigaset_blockdriver(struct gigaset_driver *drv)
+{
+ drv->blocked = 1;
+}
+EXPORT_SYMBOL_GPL(gigaset_blockdriver);
+
+static int __init gigaset_init_module(void)
+{
+ /* in accordance with the principle of least astonishment,
+ * setting the 'debug' parameter to 1 activates a sensible
+ * set of default debug levels
+ */
+ if (gigaset_debuglevel == 1)
+ gigaset_debuglevel = DEBUG_DEFAULT;
+
+ pr_info(DRIVER_DESC DRIVER_DESC_DEBUG "\n");
+ gigaset_isdn_regdrv();
+ return 0;
+}
+
+static void __exit gigaset_exit_module(void)
+{
+ gigaset_isdn_unregdrv();
+}
+
+module_init(gigaset_init_module);
+module_exit(gigaset_exit_module);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+
+MODULE_LICENSE("GPL");
--- /dev/null
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
++// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Dummy LL interface for the Gigaset driver
+ *
+ * Copyright (c) 2009 by Tilman Schmidt <tilman@imap.cc>.
+ *
+ * =====================================================================
+ * =====================================================================
+ */
+
+#include <linux/export.h>
+#include "gigaset.h"
+
+void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb)
+{
+}
+EXPORT_SYMBOL_GPL(gigaset_skb_sent);
+
+void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)
+{
+}
+EXPORT_SYMBOL_GPL(gigaset_skb_rcvd);
+
+void gigaset_isdn_rcv_err(struct bc_state *bcs)
+{
+}
+EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err);
+
+int gigaset_isdn_icall(struct at_state_t *at_state)
+{
+ return ICALL_IGNORE;
+}
+
+void gigaset_isdn_connD(struct bc_state *bcs)
+{
+}
+
+void gigaset_isdn_hupD(struct bc_state *bcs)
+{
+}
+
+void gigaset_isdn_connB(struct bc_state *bcs)
+{
+}
+
+void gigaset_isdn_hupB(struct bc_state *bcs)
+{
+}
+
+void gigaset_isdn_start(struct cardstate *cs)
+{
+}
+
+void gigaset_isdn_stop(struct cardstate *cs)
+{
+}
+
+int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid)
+{
+ return 0;
+}
+
+void gigaset_isdn_unregdev(struct cardstate *cs)
+{
+}
+
+void gigaset_isdn_regdrv(void)
+{
+ pr_info("no ISDN subsystem interface\n");
+}
+
+void gigaset_isdn_unregdrv(void)
+{
+}
--- /dev/null
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
++// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Stuff used by all variants of the driver
+ *
+ * Copyright (c) 2001 by Stefan Eilers,
+ * Hansjoerg Lipp <hjlipp@web.de>,
+ * Tilman Schmidt <tilman@imap.cc>.
+ *
+ * =====================================================================
+ * =====================================================================
+ */
+
+#include <linux/export.h>
+#include "gigaset.h"
+
+/* ========================================================== */
+/* bit masks for pending commands */
+#define PC_DIAL 0x001
+#define PC_HUP 0x002
+#define PC_INIT 0x004
+#define PC_DLE0 0x008
+#define PC_DLE1 0x010
+#define PC_SHUTDOWN 0x020
+#define PC_ACCEPT 0x040
+#define PC_CID 0x080
+#define PC_NOCID 0x100
+#define PC_CIDMODE 0x200
+#define PC_UMMODE 0x400
+
+/* types of modem responses */
+#define RT_NOTHING 0
+#define RT_ZSAU 1
+#define RT_RING 2
+#define RT_NUMBER 3
+#define RT_STRING 4
+#define RT_ZCAU 6
+
+/* Possible ASCII responses */
+#define RSP_OK 0
+#define RSP_ERROR 1
+#define RSP_ZGCI 3
+#define RSP_RING 4
+#define RSP_ZVLS 5
+#define RSP_ZCAU 6
+
+/* responses with values to store in at_state */
+/* - numeric */
+#define RSP_VAR 100
+#define RSP_ZSAU (RSP_VAR + VAR_ZSAU)
+#define RSP_ZDLE (RSP_VAR + VAR_ZDLE)
+#define RSP_ZCTP (RSP_VAR + VAR_ZCTP)
+/* - string */
+#define RSP_STR (RSP_VAR + VAR_NUM)
+#define RSP_NMBR (RSP_STR + STR_NMBR)
+#define RSP_ZCPN (RSP_STR + STR_ZCPN)
+#define RSP_ZCON (RSP_STR + STR_ZCON)
+#define RSP_ZBC (RSP_STR + STR_ZBC)
+#define RSP_ZHLC (RSP_STR + STR_ZHLC)
+
+#define RSP_WRONG_CID -2 /* unknown cid in cmd */
+#define RSP_INVAL -6 /* invalid response */
+#define RSP_NODEV -9 /* device not connected */
+
+#define RSP_NONE -19
+#define RSP_STRING -20
+#define RSP_NULL -21
+#define RSP_INIT -27
+#define RSP_ANY -26
+#define RSP_LAST -28
+
+/* actions for process_response */
+#define ACT_NOTHING 0
+#define ACT_SETDLE1 1
+#define ACT_SETDLE0 2
+#define ACT_FAILINIT 3
+#define ACT_HUPMODEM 4
+#define ACT_CONFIGMODE 5
+#define ACT_INIT 6
+#define ACT_DLE0 7
+#define ACT_DLE1 8
+#define ACT_FAILDLE0 9
+#define ACT_FAILDLE1 10
+#define ACT_RING 11
+#define ACT_CID 12
+#define ACT_FAILCID 13
+#define ACT_SDOWN 14
+#define ACT_FAILSDOWN 15
+#define ACT_DEBUG 16
+#define ACT_WARN 17
+#define ACT_DIALING 18
+#define ACT_ABORTDIAL 19
+#define ACT_DISCONNECT 20
+#define ACT_CONNECT 21
+#define ACT_REMOTEREJECT 22
+#define ACT_CONNTIMEOUT 23
+#define ACT_REMOTEHUP 24
+#define ACT_ABORTHUP 25
+#define ACT_ICALL 26
+#define ACT_ACCEPTED 27
+#define ACT_ABORTACCEPT 28
+#define ACT_TIMEOUT 29
+#define ACT_GETSTRING 30
+#define ACT_SETVER 31
+#define ACT_FAILVER 32
+#define ACT_GOTVER 33
+#define ACT_TEST 34
+#define ACT_ERROR 35
+#define ACT_ABORTCID 36
+#define ACT_ZCAU 37
+#define ACT_NOTIFY_BC_DOWN 38
+#define ACT_NOTIFY_BC_UP 39
+#define ACT_DIAL 40
+#define ACT_ACCEPT 41
+#define ACT_HUP 43
+#define ACT_IF_LOCK 44
+#define ACT_START 45
+#define ACT_STOP 46
+#define ACT_FAKEDLE0 47
+#define ACT_FAKEHUP 48
+#define ACT_FAKESDOWN 49
+#define ACT_SHUTDOWN 50
+#define ACT_PROC_CIDMODE 51
+#define ACT_UMODESET 52
+#define ACT_FAILUMODE 53
+#define ACT_CMODESET 54
+#define ACT_FAILCMODE 55
+#define ACT_IF_VER 56
+#define ACT_CMD 100
+
+/* at command sequences */
+#define SEQ_NONE 0
+#define SEQ_INIT 100
+#define SEQ_DLE0 200
+#define SEQ_DLE1 250
+#define SEQ_CID 300
+#define SEQ_NOCID 350
+#define SEQ_HUP 400
+#define SEQ_DIAL 600
+#define SEQ_ACCEPT 720
+#define SEQ_SHUTDOWN 500
+#define SEQ_CIDMODE 10
+#define SEQ_UMMODE 11
+
+
+/* 100: init, 200: dle0, 250:dle1, 300: get cid (dial), 350: "hup" (no cid),
+ * 400: hup, 500: reset, 600: dial, 700: ring */
+struct reply_t gigaset_tab_nocid[] =
+{
+/* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout,
+ * action, command */
+
+/* initialize device, set cid mode if possible */
+ {RSP_INIT, -1, -1, SEQ_INIT, 100, 1, {ACT_TIMEOUT} },
+
+ {EV_TIMEOUT, 100, 100, -1, 101, 3, {0}, "Z\r"},
+ {RSP_OK, 101, 103, -1, 120, 5, {ACT_GETSTRING},
+ "+GMR\r"},
+
+ {EV_TIMEOUT, 101, 101, -1, 102, 5, {0}, "Z\r"},
+ {RSP_ERROR, 101, 101, -1, 102, 5, {0}, "Z\r"},
+
+ {EV_TIMEOUT, 102, 102, -1, 108, 5, {ACT_SETDLE1},
+ "^SDLE=0\r"},
+ {RSP_OK, 108, 108, -1, 104, -1},
+ {RSP_ZDLE, 104, 104, 0, 103, 5, {0}, "Z\r"},
+ {EV_TIMEOUT, 104, 104, -1, 0, 0, {ACT_FAILINIT} },
+ {RSP_ERROR, 108, 108, -1, 0, 0, {ACT_FAILINIT} },
+
+ {EV_TIMEOUT, 108, 108, -1, 105, 2, {ACT_SETDLE0,
+ ACT_HUPMODEM,
+ ACT_TIMEOUT} },
+ {EV_TIMEOUT, 105, 105, -1, 103, 5, {0}, "Z\r"},
+
+ {RSP_ERROR, 102, 102, -1, 107, 5, {0}, "^GETPRE\r"},
+ {RSP_OK, 107, 107, -1, 0, 0, {ACT_CONFIGMODE} },
+ {RSP_ERROR, 107, 107, -1, 0, 0, {ACT_FAILINIT} },
+ {EV_TIMEOUT, 107, 107, -1, 0, 0, {ACT_FAILINIT} },
+
+ {RSP_ERROR, 103, 103, -1, 0, 0, {ACT_FAILINIT} },
+ {EV_TIMEOUT, 103, 103, -1, 0, 0, {ACT_FAILINIT} },
+
+ {RSP_STRING, 120, 120, -1, 121, -1, {ACT_SETVER} },
+
+ {EV_TIMEOUT, 120, 121, -1, 0, 0, {ACT_FAILVER,
+ ACT_INIT} },
+ {RSP_ERROR, 120, 121, -1, 0, 0, {ACT_FAILVER,
+ ACT_INIT} },
+ {RSP_OK, 121, 121, -1, 0, 0, {ACT_GOTVER,
+ ACT_INIT} },
+ {RSP_NONE, 121, 121, -1, 120, 0, {ACT_GETSTRING} },
+
+/* leave dle mode */
+ {RSP_INIT, 0, 0, SEQ_DLE0, 201, 5, {0}, "^SDLE=0\r"},
+ {RSP_OK, 201, 201, -1, 202, -1},
+ {RSP_ZDLE, 202, 202, 0, 0, 0, {ACT_DLE0} },
+ {RSP_NODEV, 200, 249, -1, 0, 0, {ACT_FAKEDLE0} },
+ {RSP_ERROR, 200, 249, -1, 0, 0, {ACT_FAILDLE0} },
+ {EV_TIMEOUT, 200, 249, -1, 0, 0, {ACT_FAILDLE0} },
+
+/* enter dle mode */
+ {RSP_INIT, 0, 0, SEQ_DLE1, 251, 5, {0}, "^SDLE=1\r"},
+ {RSP_OK, 251, 251, -1, 252, -1},
+ {RSP_ZDLE, 252, 252, 1, 0, 0, {ACT_DLE1} },
+ {RSP_ERROR, 250, 299, -1, 0, 0, {ACT_FAILDLE1} },
+ {EV_TIMEOUT, 250, 299, -1, 0, 0, {ACT_FAILDLE1} },
+
+/* incoming call */
+ {RSP_RING, -1, -1, -1, -1, -1, {ACT_RING} },
+
+/* get cid */
+ {RSP_INIT, 0, 0, SEQ_CID, 301, 5, {0}, "^SGCI?\r"},
+ {RSP_OK, 301, 301, -1, 302, -1},
+ {RSP_ZGCI, 302, 302, -1, 0, 0, {ACT_CID} },
+ {RSP_ERROR, 301, 349, -1, 0, 0, {ACT_FAILCID} },
+ {EV_TIMEOUT, 301, 349, -1, 0, 0, {ACT_FAILCID} },
+
+/* enter cid mode */
+ {RSP_INIT, 0, 0, SEQ_CIDMODE, 150, 5, {0}, "^SGCI=1\r"},
+ {RSP_OK, 150, 150, -1, 0, 0, {ACT_CMODESET} },
+ {RSP_ERROR, 150, 150, -1, 0, 0, {ACT_FAILCMODE} },
+ {EV_TIMEOUT, 150, 150, -1, 0, 0, {ACT_FAILCMODE} },
+
+/* leave cid mode */
+ {RSP_INIT, 0, 0, SEQ_UMMODE, 160, 5, {0}, "Z\r"},
+ {RSP_OK, 160, 160, -1, 0, 0, {ACT_UMODESET} },
+ {RSP_ERROR, 160, 160, -1, 0, 0, {ACT_FAILUMODE} },
+ {EV_TIMEOUT, 160, 160, -1, 0, 0, {ACT_FAILUMODE} },
+
+/* abort getting cid */
+ {RSP_INIT, 0, 0, SEQ_NOCID, 0, 0, {ACT_ABORTCID} },
+
+/* reset */
+ {RSP_INIT, 0, 0, SEQ_SHUTDOWN, 504, 5, {0}, "Z\r"},
+ {RSP_OK, 504, 504, -1, 0, 0, {ACT_SDOWN} },
+ {RSP_ERROR, 501, 599, -1, 0, 0, {ACT_FAILSDOWN} },
+ {EV_TIMEOUT, 501, 599, -1, 0, 0, {ACT_FAILSDOWN} },
+ {RSP_NODEV, 501, 599, -1, 0, 0, {ACT_FAKESDOWN} },
+
+ {EV_PROC_CIDMODE, -1, -1, -1, -1, -1, {ACT_PROC_CIDMODE} },
+ {EV_IF_LOCK, -1, -1, -1, -1, -1, {ACT_IF_LOCK} },
+ {EV_IF_VER, -1, -1, -1, -1, -1, {ACT_IF_VER} },
+ {EV_START, -1, -1, -1, -1, -1, {ACT_START} },
+ {EV_STOP, -1, -1, -1, -1, -1, {ACT_STOP} },
+ {EV_SHUTDOWN, -1, -1, -1, -1, -1, {ACT_SHUTDOWN} },
+
+/* misc. */
+ {RSP_ERROR, -1, -1, -1, -1, -1, {ACT_ERROR} },
+ {RSP_ZCAU, -1, -1, -1, -1, -1, {ACT_ZCAU} },
+ {RSP_NONE, -1, -1, -1, -1, -1, {ACT_DEBUG} },
+ {RSP_ANY, -1, -1, -1, -1, -1, {ACT_WARN} },
+ {RSP_LAST}
+};
+
+/* 600: start dialing, 650: dial in progress, 800: connection is up, 700: ring,
+ * 400: hup, 750: accepted icall */
+struct reply_t gigaset_tab_cid[] =
+{
+/* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout,
+ * action, command */
+
+/* dial */
+ {EV_DIAL, -1, -1, -1, -1, -1, {ACT_DIAL} },
+ {RSP_INIT, 0, 0, SEQ_DIAL, 601, 5, {ACT_CMD + AT_BC} },
+ {RSP_OK, 601, 601, -1, 603, 5, {ACT_CMD + AT_PROTO} },
+ {RSP_OK, 603, 603, -1, 604, 5, {ACT_CMD + AT_TYPE} },
+ {RSP_OK, 604, 604, -1, 605, 5, {ACT_CMD + AT_MSN} },
+ {RSP_NULL, 605, 605, -1, 606, 5, {ACT_CMD + AT_CLIP} },
+ {RSP_OK, 605, 605, -1, 606, 5, {ACT_CMD + AT_CLIP} },
+ {RSP_NULL, 606, 606, -1, 607, 5, {ACT_CMD + AT_ISO} },
+ {RSP_OK, 606, 606, -1, 607, 5, {ACT_CMD + AT_ISO} },
+ {RSP_OK, 607, 607, -1, 608, 5, {0}, "+VLS=17\r"},
+ {RSP_OK, 608, 608, -1, 609, -1},
+ {RSP_ZSAU, 609, 609, ZSAU_PROCEEDING, 610, 5, {ACT_CMD + AT_DIAL} },
+ {RSP_OK, 610, 610, -1, 650, 0, {ACT_DIALING} },
+
+ {RSP_ERROR, 601, 610, -1, 0, 0, {ACT_ABORTDIAL} },
+ {EV_TIMEOUT, 601, 610, -1, 0, 0, {ACT_ABORTDIAL} },
+
+/* optional dialing responses */
+ {EV_BC_OPEN, 650, 650, -1, 651, -1},
+ {RSP_ZVLS, 609, 651, 17, -1, -1, {ACT_DEBUG} },
+ {RSP_ZCTP, 610, 651, -1, -1, -1, {ACT_DEBUG} },
+ {RSP_ZCPN, 610, 651, -1, -1, -1, {ACT_DEBUG} },
+ {RSP_ZSAU, 650, 651, ZSAU_CALL_DELIVERED, -1, -1, {ACT_DEBUG} },
+
+/* connect */
+ {RSP_ZSAU, 650, 650, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT} },
+ {RSP_ZSAU, 651, 651, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT,
+ ACT_NOTIFY_BC_UP} },
+ {RSP_ZSAU, 750, 750, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT} },
+ {RSP_ZSAU, 751, 751, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT,
+ ACT_NOTIFY_BC_UP} },
+ {EV_BC_OPEN, 800, 800, -1, 800, -1, {ACT_NOTIFY_BC_UP} },
+
+/* remote hangup */
+ {RSP_ZSAU, 650, 651, ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEREJECT} },
+ {RSP_ZSAU, 750, 751, ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEHUP} },
+ {RSP_ZSAU, 800, 800, ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEHUP} },
+
+/* hangup */
+ {EV_HUP, -1, -1, -1, -1, -1, {ACT_HUP} },
+ {RSP_INIT, -1, -1, SEQ_HUP, 401, 5, {0}, "+VLS=0\r"},
+ {RSP_OK, 401, 401, -1, 402, 5},
+ {RSP_ZVLS, 402, 402, 0, 403, 5},
+ {RSP_ZSAU, 403, 403, ZSAU_DISCONNECT_REQ, -1, -1, {ACT_DEBUG} },
+ {RSP_ZSAU, 403, 403, ZSAU_NULL, 0, 0, {ACT_DISCONNECT} },
+ {RSP_NODEV, 401, 403, -1, 0, 0, {ACT_FAKEHUP} },
+ {RSP_ERROR, 401, 401, -1, 0, 0, {ACT_ABORTHUP} },
+ {EV_TIMEOUT, 401, 403, -1, 0, 0, {ACT_ABORTHUP} },
+
+ {EV_BC_CLOSED, 0, 0, -1, 0, -1, {ACT_NOTIFY_BC_DOWN} },
+
+/* ring */
+ {RSP_ZBC, 700, 700, -1, -1, -1, {0} },
+ {RSP_ZHLC, 700, 700, -1, -1, -1, {0} },
+ {RSP_NMBR, 700, 700, -1, -1, -1, {0} },
+ {RSP_ZCPN, 700, 700, -1, -1, -1, {0} },
+ {RSP_ZCTP, 700, 700, -1, -1, -1, {0} },
+ {EV_TIMEOUT, 700, 700, -1, 720, 720, {ACT_ICALL} },
+ {EV_BC_CLOSED, 720, 720, -1, 0, -1, {ACT_NOTIFY_BC_DOWN} },
+
+/*accept icall*/
+ {EV_ACCEPT, -1, -1, -1, -1, -1, {ACT_ACCEPT} },
+ {RSP_INIT, 720, 720, SEQ_ACCEPT, 721, 5, {ACT_CMD + AT_PROTO} },
+ {RSP_OK, 721, 721, -1, 722, 5, {ACT_CMD + AT_ISO} },
+ {RSP_OK, 722, 722, -1, 723, 5, {0}, "+VLS=17\r"},
+ {RSP_OK, 723, 723, -1, 724, 5, {0} },
+ {RSP_ZVLS, 724, 724, 17, 750, 50, {ACT_ACCEPTED} },
+ {RSP_ERROR, 721, 729, -1, 0, 0, {ACT_ABORTACCEPT} },
+ {EV_TIMEOUT, 721, 729, -1, 0, 0, {ACT_ABORTACCEPT} },
+ {RSP_ZSAU, 700, 729, ZSAU_NULL, 0, 0, {ACT_ABORTACCEPT} },
+ {RSP_ZSAU, 700, 729, ZSAU_ACTIVE, 0, 0, {ACT_ABORTACCEPT} },
+ {RSP_ZSAU, 700, 729, ZSAU_DISCONNECT_IND, 0, 0, {ACT_ABORTACCEPT} },
+
+ {EV_BC_OPEN, 750, 750, -1, 751, -1},
+ {EV_TIMEOUT, 750, 751, -1, 0, 0, {ACT_CONNTIMEOUT} },
+
+/* B channel closed (general case) */
+ {EV_BC_CLOSED, -1, -1, -1, -1, -1, {ACT_NOTIFY_BC_DOWN} },
+
+/* misc. */
+ {RSP_ZCON, -1, -1, -1, -1, -1, {ACT_DEBUG} },
+ {RSP_ZCAU, -1, -1, -1, -1, -1, {ACT_ZCAU} },
+ {RSP_NONE, -1, -1, -1, -1, -1, {ACT_DEBUG} },
+ {RSP_ANY, -1, -1, -1, -1, -1, {ACT_WARN} },
+ {RSP_LAST}
+};
+
+
+static const struct resp_type_t {
+ char *response;
+ int resp_code;
+ int type;
+}
+resp_type[] =
+{
+ {"OK", RSP_OK, RT_NOTHING},
+ {"ERROR", RSP_ERROR, RT_NOTHING},
+ {"ZSAU", RSP_ZSAU, RT_ZSAU},
+ {"ZCAU", RSP_ZCAU, RT_ZCAU},
+ {"RING", RSP_RING, RT_RING},
+ {"ZGCI", RSP_ZGCI, RT_NUMBER},
+ {"ZVLS", RSP_ZVLS, RT_NUMBER},
+ {"ZCTP", RSP_ZCTP, RT_NUMBER},
+ {"ZDLE", RSP_ZDLE, RT_NUMBER},
+ {"ZHLC", RSP_ZHLC, RT_STRING},
+ {"ZBC", RSP_ZBC, RT_STRING},
+ {"NMBR", RSP_NMBR, RT_STRING},
+ {"ZCPN", RSP_ZCPN, RT_STRING},
+ {"ZCON", RSP_ZCON, RT_STRING},
+ {NULL, 0, 0}
+};
+
+static const struct zsau_resp_t {
+ char *str;
+ int code;
+}
+zsau_resp[] =
+{
+ {"OUTGOING_CALL_PROCEEDING", ZSAU_PROCEEDING},
+ {"CALL_DELIVERED", ZSAU_CALL_DELIVERED},
+ {"ACTIVE", ZSAU_ACTIVE},
+ {"DISCONNECT_IND", ZSAU_DISCONNECT_IND},
+ {"NULL", ZSAU_NULL},
+ {"DISCONNECT_REQ", ZSAU_DISCONNECT_REQ},
+ {NULL, ZSAU_UNKNOWN}
+};
+
+/* check for and remove fixed string prefix
+ * If s starts with prefix terminated by a non-alphanumeric character,
+ * return pointer to the first character after that, otherwise return NULL.
+ */
+static char *skip_prefix(char *s, const char *prefix)
+{
+ while (*prefix)
+ if (*s++ != *prefix++)
+ return NULL;
+ if (isalnum(*s))
+ return NULL;
+ return s;
+}
+
+/* queue event with CID */
+static void add_cid_event(struct cardstate *cs, int cid, int type,
+ void *ptr, int parameter)
+{
+ unsigned long flags;
+ unsigned next, tail;
+ struct event_t *event;
+
+ gig_dbg(DEBUG_EVENT, "queueing event %d for cid %d", type, cid);
+
+ spin_lock_irqsave(&cs->ev_lock, flags);
+
+ tail = cs->ev_tail;
+ next = (tail + 1) % MAX_EVENTS;
+ if (unlikely(next == cs->ev_head)) {
+ dev_err(cs->dev, "event queue full\n");
+ kfree(ptr);
+ } else {
+ event = cs->events + tail;
+ event->type = type;
+ event->cid = cid;
+ event->ptr = ptr;
+ event->arg = NULL;
+ event->parameter = parameter;
+ event->at_state = NULL;
+ cs->ev_tail = next;
+ }
+
+ spin_unlock_irqrestore(&cs->ev_lock, flags);
+}
+
+/**
+ * gigaset_handle_modem_response() - process received modem response
+ * @cs: device descriptor structure.
+ *
+ * Called by asyncdata/isocdata if a block of data received from the
+ * device must be processed as a modem command response. The data is
+ * already in the cs structure.
+ */
+void gigaset_handle_modem_response(struct cardstate *cs)
+{
+ char *eoc, *psep, *ptr;
+ const struct resp_type_t *rt;
+ const struct zsau_resp_t *zr;
+ int cid, parameter;
+ u8 type, value;
+
+ if (!cs->cbytes) {
+ /* ignore additional LFs/CRs (M10x config mode or cx100) */
+ gig_dbg(DEBUG_MCMD, "skipped EOL [%02X]", cs->respdata[0]);
+ return;
+ }
+ cs->respdata[cs->cbytes] = 0;
+
+ if (cs->at_state.getstring) {
+ /* state machine wants next line verbatim */
+ cs->at_state.getstring = 0;
+ ptr = kstrdup(cs->respdata, GFP_ATOMIC);
+ gig_dbg(DEBUG_EVENT, "string==%s", ptr ? ptr : "NULL");
+ add_cid_event(cs, 0, RSP_STRING, ptr, 0);
+ return;
+ }
+
+ /* look up response type */
+ for (rt = resp_type; rt->response; ++rt) {
+ eoc = skip_prefix(cs->respdata, rt->response);
+ if (eoc)
+ break;
+ }
+ if (!rt->response) {
+ add_cid_event(cs, 0, RSP_NONE, NULL, 0);
+ gig_dbg(DEBUG_EVENT, "unknown modem response: '%s'\n",
+ cs->respdata);
+ return;
+ }
+
+ /* check for CID */
+ psep = strrchr(cs->respdata, ';');
+ if (psep &&
+ !kstrtoint(psep + 1, 10, &cid) &&
+ cid >= 1 && cid <= 65535) {
+ /* valid CID: chop it off */
+ *psep = 0;
+ } else {
+ /* no valid CID: leave unchanged */
+ cid = 0;
+ }
+
+ gig_dbg(DEBUG_EVENT, "CMD received: %s", cs->respdata);
+ if (cid)
+ gig_dbg(DEBUG_EVENT, "CID: %d", cid);
+
+ switch (rt->type) {
+ case RT_NOTHING:
+ /* check parameter separator */
+ if (*eoc)
+ goto bad_param; /* extra parameter */
+
+ add_cid_event(cs, cid, rt->resp_code, NULL, 0);
+ break;
+
+ case RT_RING:
+ /* check parameter separator */
+ if (!*eoc)
+ eoc = NULL; /* no parameter */
+ else if (*eoc++ != ',')
+ goto bad_param;
+
+ add_cid_event(cs, 0, rt->resp_code, NULL, cid);
+
+ /* process parameters as individual responses */
+ while (eoc) {
+ /* look up parameter type */
+ psep = NULL;
+ for (rt = resp_type; rt->response; ++rt) {
+ psep = skip_prefix(eoc, rt->response);
+ if (psep)
+ break;
+ }
+
+ /* all legal parameters are of type RT_STRING */
+ if (!psep || rt->type != RT_STRING) {
+ dev_warn(cs->dev,
+ "illegal RING parameter: '%s'\n",
+ eoc);
+ return;
+ }
+
+ /* skip parameter value separator */
+ if (*psep++ != '=')
+ goto bad_param;
+
+ /* look up end of parameter */
+ eoc = strchr(psep, ',');
+ if (eoc)
+ *eoc++ = 0;
+
+ /* retrieve parameter value */
+ ptr = kstrdup(psep, GFP_ATOMIC);
+
+ /* queue event */
+ add_cid_event(cs, cid, rt->resp_code, ptr, 0);
+ }
+ break;
+
+ case RT_ZSAU:
+ /* check parameter separator */
+ if (!*eoc) {
+ /* no parameter */
+ add_cid_event(cs, cid, rt->resp_code, NULL, ZSAU_NONE);
+ break;
+ }
+ if (*eoc++ != '=')
+ goto bad_param;
+
+ /* look up parameter value */
+ for (zr = zsau_resp; zr->str; ++zr)
+ if (!strcmp(eoc, zr->str))
+ break;
+ if (!zr->str)
+ goto bad_param;
+
+ add_cid_event(cs, cid, rt->resp_code, NULL, zr->code);
+ break;
+
+ case RT_STRING:
+ /* check parameter separator */
+ if (*eoc++ != '=')
+ goto bad_param;
+
+ /* retrieve parameter value */
+ ptr = kstrdup(eoc, GFP_ATOMIC);
+
+ /* queue event */
+ add_cid_event(cs, cid, rt->resp_code, ptr, 0);
+ break;
+
+ case RT_ZCAU:
+ /* check parameter separators */
+ if (*eoc++ != '=')
+ goto bad_param;
+ psep = strchr(eoc, ',');
+ if (!psep)
+ goto bad_param;
+ *psep++ = 0;
+
+ /* decode parameter values */
+ if (kstrtou8(eoc, 16, &type) || kstrtou8(psep, 16, &value)) {
+ *--psep = ',';
+ goto bad_param;
+ }
+ parameter = (type << 8) | value;
+
+ add_cid_event(cs, cid, rt->resp_code, NULL, parameter);
+ break;
+
+ case RT_NUMBER:
+ /* check parameter separator */
+ if (*eoc++ != '=')
+ goto bad_param;
+
+ /* decode parameter value */
+ if (kstrtoint(eoc, 10, ¶meter))
+ goto bad_param;
+
+ /* special case ZDLE: set flag before queueing event */
+ if (rt->resp_code == RSP_ZDLE)
+ cs->dle = parameter;
+
+ add_cid_event(cs, cid, rt->resp_code, NULL, parameter);
+ break;
+
+bad_param:
+ /* parameter unexpected, incomplete or malformed */
+ dev_warn(cs->dev, "bad parameter in response '%s'\n",
+ cs->respdata);
+ add_cid_event(cs, cid, rt->resp_code, NULL, -1);
+ break;
+
+ default:
+ dev_err(cs->dev, "%s: internal error on '%s'\n",
+ __func__, cs->respdata);
+ }
+}
+EXPORT_SYMBOL_GPL(gigaset_handle_modem_response);
+
+/* disconnect_nobc
+ * process closing of connection associated with given AT state structure
+ * without B channel
+ */
+static void disconnect_nobc(struct at_state_t **at_state_p,
+ struct cardstate *cs)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cs->lock, flags);
+ ++(*at_state_p)->seq_index;
+
+ /* revert to selected idle mode */
+ if (!cs->cidmode) {
+ cs->at_state.pending_commands |= PC_UMMODE;
+ gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
+ cs->commands_pending = 1;
+ }
+
+ /* check for and deallocate temporary AT state */
+ if (!list_empty(&(*at_state_p)->list)) {
+ list_del(&(*at_state_p)->list);
+ kfree(*at_state_p);
+ *at_state_p = NULL;
+ }
+
+ spin_unlock_irqrestore(&cs->lock, flags);
+}
+
+/* disconnect_bc
+ * process closing of connection associated with given AT state structure
+ * and B channel
+ */
+static void disconnect_bc(struct at_state_t *at_state,
+ struct cardstate *cs, struct bc_state *bcs)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cs->lock, flags);
+ ++at_state->seq_index;
+
+ /* revert to selected idle mode */
+ if (!cs->cidmode) {
+ cs->at_state.pending_commands |= PC_UMMODE;
+ gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
+ cs->commands_pending = 1;
+ }
+ spin_unlock_irqrestore(&cs->lock, flags);
+
+ /* invoke hardware specific handler */
+ cs->ops->close_bchannel(bcs);
+
+ /* notify LL */
+ if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
+ bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
+ gigaset_isdn_hupD(bcs);
+ }
+}
+
+/* get_free_channel
+ * get a free AT state structure: either one of those associated with the
+ * B channels of the Gigaset device, or if none of those is available,
+ * a newly allocated one with bcs=NULL
+ * The structure should be freed by calling disconnect_nobc() after use.
+ */
+static inline struct at_state_t *get_free_channel(struct cardstate *cs,
+ int cid)
+/* cids: >0: siemens-cid
+ * 0: without cid
+ * -1: no cid assigned yet
+ */
+{
+ unsigned long flags;
+ int i;
+ struct at_state_t *ret;
+
+ for (i = 0; i < cs->channels; ++i)
+ if (gigaset_get_channel(cs->bcs + i) >= 0) {
+ ret = &cs->bcs[i].at_state;
+ ret->cid = cid;
+ return ret;
+ }
+
+ spin_lock_irqsave(&cs->lock, flags);
+ ret = kmalloc(sizeof(struct at_state_t), GFP_ATOMIC);
+ if (ret) {
+ gigaset_at_init(ret, NULL, cs, cid);
+ list_add(&ret->list, &cs->temp_at_states);
+ }
+ spin_unlock_irqrestore(&cs->lock, flags);
+ return ret;
+}
+
+static void init_failed(struct cardstate *cs, int mode)
+{
+ int i;
+ struct at_state_t *at_state;
+
+ cs->at_state.pending_commands &= ~PC_INIT;
+ cs->mode = mode;
+ cs->mstate = MS_UNINITIALIZED;
+ gigaset_free_channels(cs);
+ for (i = 0; i < cs->channels; ++i) {
+ at_state = &cs->bcs[i].at_state;
+ if (at_state->pending_commands & PC_CID) {
+ at_state->pending_commands &= ~PC_CID;
+ at_state->pending_commands |= PC_NOCID;
+ cs->commands_pending = 1;
+ }
+ }
+}
+
+static void schedule_init(struct cardstate *cs, int state)
+{
+ if (cs->at_state.pending_commands & PC_INIT) {
+ gig_dbg(DEBUG_EVENT, "not scheduling PC_INIT again");
+ return;
+ }
+ cs->mstate = state;
+ cs->mode = M_UNKNOWN;
+ gigaset_block_channels(cs);
+ cs->at_state.pending_commands |= PC_INIT;
+ gig_dbg(DEBUG_EVENT, "Scheduling PC_INIT");
+ cs->commands_pending = 1;
+}
+
+/* send an AT command
+ * adding the "AT" prefix, cid and DLE encapsulation as appropriate
+ */
+static void send_command(struct cardstate *cs, const char *cmd,
+ struct at_state_t *at_state)
+{
+ int cid = at_state->cid;
+ struct cmdbuf_t *cb;
+ size_t buflen;
+
+ buflen = strlen(cmd) + 12; /* DLE ( A T 1 2 3 4 5 <cmd> DLE ) \0 */
+ cb = kmalloc(sizeof(struct cmdbuf_t) + buflen, GFP_ATOMIC);
+ if (!cb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ if (cid > 0 && cid <= 65535)
+ cb->len = snprintf(cb->buf, buflen,
+ cs->dle ? "\020(AT%d%s\020)" : "AT%d%s",
+ cid, cmd);
+ else
+ cb->len = snprintf(cb->buf, buflen,
+ cs->dle ? "\020(AT%s\020)" : "AT%s",
+ cmd);
+ cb->offset = 0;
+ cb->next = NULL;
+ cb->wake_tasklet = NULL;
+ cs->ops->write_cmd(cs, cb);
+}
+
+static struct at_state_t *at_state_from_cid(struct cardstate *cs, int cid)
+{
+ struct at_state_t *at_state;
+ int i;
+ unsigned long flags;
+
+ if (cid == 0)
+ return &cs->at_state;
+
+ for (i = 0; i < cs->channels; ++i)
+ if (cid == cs->bcs[i].at_state.cid)
+ return &cs->bcs[i].at_state;
+
+ spin_lock_irqsave(&cs->lock, flags);
+
+ list_for_each_entry(at_state, &cs->temp_at_states, list)
+ if (cid == at_state->cid) {
+ spin_unlock_irqrestore(&cs->lock, flags);
+ return at_state;
+ }
+
+ spin_unlock_irqrestore(&cs->lock, flags);
+
+ return NULL;
+}
+
+static void bchannel_down(struct bc_state *bcs)
+{
+ if (bcs->chstate & CHS_B_UP) {
+ bcs->chstate &= ~CHS_B_UP;
+ gigaset_isdn_hupB(bcs);
+ }
+
+ if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
+ bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
+ gigaset_isdn_hupD(bcs);
+ }
+
+ gigaset_free_channel(bcs);
+
+ gigaset_bcs_reinit(bcs);
+}
+
+static void bchannel_up(struct bc_state *bcs)
+{
+ if (bcs->chstate & CHS_B_UP) {
+ dev_notice(bcs->cs->dev, "%s: B channel already up\n",
+ __func__);
+ return;
+ }
+
+ bcs->chstate |= CHS_B_UP;
+ gigaset_isdn_connB(bcs);
+}
+
+static void start_dial(struct at_state_t *at_state, void *data,
+ unsigned seq_index)
+{
+ struct bc_state *bcs = at_state->bcs;
+ struct cardstate *cs = at_state->cs;
+ char **commands = data;
+ unsigned long flags;
+ int i;
+
+ bcs->chstate |= CHS_NOTIFY_LL;
+
+ spin_lock_irqsave(&cs->lock, flags);
+ if (at_state->seq_index != seq_index) {
+ spin_unlock_irqrestore(&cs->lock, flags);
+ goto error;
+ }
+ spin_unlock_irqrestore(&cs->lock, flags);
+
+ for (i = 0; i < AT_NUM; ++i) {
+ kfree(bcs->commands[i]);
+ bcs->commands[i] = commands[i];
+ }
+
+ at_state->pending_commands |= PC_CID;
+ gig_dbg(DEBUG_EVENT, "Scheduling PC_CID");
+ cs->commands_pending = 1;
+ return;
+
+error:
+ for (i = 0; i < AT_NUM; ++i) {
+ kfree(commands[i]);
+ commands[i] = NULL;
+ }
+ at_state->pending_commands |= PC_NOCID;
+ gig_dbg(DEBUG_EVENT, "Scheduling PC_NOCID");
+ cs->commands_pending = 1;
+ return;
+}
+
+static void start_accept(struct at_state_t *at_state)
+{
+ struct cardstate *cs = at_state->cs;
+ struct bc_state *bcs = at_state->bcs;
+ int i;
+
+ for (i = 0; i < AT_NUM; ++i) {
+ kfree(bcs->commands[i]);
+ bcs->commands[i] = NULL;
+ }
+
+ bcs->commands[AT_PROTO] = kmalloc(9, GFP_ATOMIC);
+ bcs->commands[AT_ISO] = kmalloc(9, GFP_ATOMIC);
+ if (!bcs->commands[AT_PROTO] || !bcs->commands[AT_ISO]) {
+ dev_err(at_state->cs->dev, "out of memory\n");
+ /* error reset */
+ at_state->pending_commands |= PC_HUP;
+ gig_dbg(DEBUG_EVENT, "Scheduling PC_HUP");
+ cs->commands_pending = 1;
+ return;
+ }
+
+ snprintf(bcs->commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
+ snprintf(bcs->commands[AT_ISO], 9, "^SISO=%u\r", bcs->channel + 1);
+
+ at_state->pending_commands |= PC_ACCEPT;
+ gig_dbg(DEBUG_EVENT, "Scheduling PC_ACCEPT");
+ cs->commands_pending = 1;
+}
+
+static void do_start(struct cardstate *cs)
+{
+ gigaset_free_channels(cs);
+
+ if (cs->mstate != MS_LOCKED)
+ schedule_init(cs, MS_INIT);
+
+ cs->isdn_up = 1;
+ gigaset_isdn_start(cs);
+
+ cs->waiting = 0;
+ wake_up(&cs->waitqueue);
+}
+
+static void finish_shutdown(struct cardstate *cs)
+{
+ if (cs->mstate != MS_LOCKED) {
+ cs->mstate = MS_UNINITIALIZED;
+ cs->mode = M_UNKNOWN;
+ }
+
+ /* Tell the LL that the device is not available .. */
+ if (cs->isdn_up) {
+ cs->isdn_up = 0;
+ gigaset_isdn_stop(cs);
+ }
+
+ /* The rest is done by cleanup_cs() in process context. */
+
+ cs->cmd_result = -ENODEV;
+ cs->waiting = 0;
+ wake_up(&cs->waitqueue);
+}
+
+static void do_shutdown(struct cardstate *cs)
+{
+ gigaset_block_channels(cs);
+
+ if (cs->mstate == MS_READY) {
+ cs->mstate = MS_SHUTDOWN;
+ cs->at_state.pending_commands |= PC_SHUTDOWN;
+ gig_dbg(DEBUG_EVENT, "Scheduling PC_SHUTDOWN");
+ cs->commands_pending = 1;
+ } else
+ finish_shutdown(cs);
+}
+
+static void do_stop(struct cardstate *cs)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cs->lock, flags);
+ cs->connected = 0;
+ spin_unlock_irqrestore(&cs->lock, flags);
+
+ do_shutdown(cs);
+}
+
+/* Entering cid mode or getting a cid failed:
+ * try to initialize the device and try again.
+ *
+ * channel >= 0: getting cid for the channel failed
+ * channel < 0: entering cid mode failed
+ *
+ * returns 0 on success, <0 on failure
+ */
+static int reinit_and_retry(struct cardstate *cs, int channel)
+{
+ int i;
+
+ if (--cs->retry_count <= 0)
+ return -EFAULT;
+
+ for (i = 0; i < cs->channels; ++i)
+ if (cs->bcs[i].at_state.cid > 0)
+ return -EBUSY;
+
+ if (channel < 0)
+ dev_warn(cs->dev,
+ "Could not enter cid mode. Reinit device and try again.\n");
+ else {
+ dev_warn(cs->dev,
+ "Could not get a call id. Reinit device and try again.\n");
+ cs->bcs[channel].at_state.pending_commands |= PC_CID;
+ }
+ schedule_init(cs, MS_INIT);
+ return 0;
+}
+
+static int at_state_invalid(struct cardstate *cs,
+ struct at_state_t *test_ptr)
+{
+ unsigned long flags;
+ unsigned channel;
+ struct at_state_t *at_state;
+ int retval = 0;
+
+ spin_lock_irqsave(&cs->lock, flags);
+
+ if (test_ptr == &cs->at_state)
+ goto exit;
+
+ list_for_each_entry(at_state, &cs->temp_at_states, list)
+ if (at_state == test_ptr)
+ goto exit;
+
+ for (channel = 0; channel < cs->channels; ++channel)
+ if (&cs->bcs[channel].at_state == test_ptr)
+ goto exit;
+
+ retval = 1;
+exit:
+ spin_unlock_irqrestore(&cs->lock, flags);
+ return retval;
+}
+
+static void handle_icall(struct cardstate *cs, struct bc_state *bcs,
+ struct at_state_t *at_state)
+{
+ int retval;
+
+ retval = gigaset_isdn_icall(at_state);
+ switch (retval) {
+ case ICALL_ACCEPT:
+ break;
+ default:
+ dev_err(cs->dev, "internal error: disposition=%d\n", retval);
+ /* fall through */
+ case ICALL_IGNORE:
+ case ICALL_REJECT:
+ /* hang up actively
+ * Device doc says that would reject the call.
+ * In fact it doesn't.
+ */
+ at_state->pending_commands |= PC_HUP;
+ cs->commands_pending = 1;
+ break;
+ }
+}
+
+static int do_lock(struct cardstate *cs)
+{
+ int mode;
+ int i;
+
+ switch (cs->mstate) {
+ case MS_UNINITIALIZED:
+ case MS_READY:
+ if (cs->cur_at_seq || !list_empty(&cs->temp_at_states) ||
+ cs->at_state.pending_commands)
+ return -EBUSY;
+
+ for (i = 0; i < cs->channels; ++i)
+ if (cs->bcs[i].at_state.pending_commands)
+ return -EBUSY;
+
+ if (gigaset_get_channels(cs) < 0)
+ return -EBUSY;
+
+ break;
+ case MS_LOCKED:
+ break;
+ default:
+ return -EBUSY;
+ }
+
+ mode = cs->mode;
+ cs->mstate = MS_LOCKED;
+ cs->mode = M_UNKNOWN;
+
+ return mode;
+}
+
+static int do_unlock(struct cardstate *cs)
+{
+ if (cs->mstate != MS_LOCKED)
+ return -EINVAL;
+
+ cs->mstate = MS_UNINITIALIZED;
+ cs->mode = M_UNKNOWN;
+ gigaset_free_channels(cs);
+ if (cs->connected)
+ schedule_init(cs, MS_INIT);
+
+ return 0;
+}
+
+static void do_action(int action, struct cardstate *cs,
+ struct bc_state *bcs,
+ struct at_state_t **p_at_state, char **pp_command,
+ int *p_genresp, int *p_resp_code,
+ struct event_t *ev)
+{
+ struct at_state_t *at_state = *p_at_state;
+ struct bc_state *bcs2;
+ unsigned long flags;
+
+ int channel;
+
+ unsigned char *s, *e;
+ int i;
+ unsigned long val;
+
+ switch (action) {
+ case ACT_NOTHING:
+ break;
+ case ACT_TIMEOUT:
+ at_state->waiting = 1;
+ break;
+ case ACT_INIT:
+ cs->at_state.pending_commands &= ~PC_INIT;
+ cs->cur_at_seq = SEQ_NONE;
+ cs->mode = M_UNIMODEM;
+ spin_lock_irqsave(&cs->lock, flags);
+ if (!cs->cidmode) {
+ spin_unlock_irqrestore(&cs->lock, flags);
+ gigaset_free_channels(cs);
+ cs->mstate = MS_READY;
+ break;
+ }
+ spin_unlock_irqrestore(&cs->lock, flags);
+ cs->at_state.pending_commands |= PC_CIDMODE;
+ gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
+ cs->commands_pending = 1;
+ break;
+ case ACT_FAILINIT:
+ dev_warn(cs->dev, "Could not initialize the device.\n");
+ cs->dle = 0;
+ init_failed(cs, M_UNKNOWN);
+ cs->cur_at_seq = SEQ_NONE;
+ break;
+ case ACT_CONFIGMODE:
+ init_failed(cs, M_CONFIG);
+ cs->cur_at_seq = SEQ_NONE;
+ break;
+ case ACT_SETDLE1:
+ cs->dle = 1;
+ /* cs->inbuf[0].inputstate |= INS_command | INS_DLE_command; */
+ cs->inbuf[0].inputstate &=
+ ~(INS_command | INS_DLE_command);
+ break;
+ case ACT_SETDLE0:
+ cs->dle = 0;
+ cs->inbuf[0].inputstate =
+ (cs->inbuf[0].inputstate & ~INS_DLE_command)
+ | INS_command;
+ break;
+ case ACT_CMODESET:
+ if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
+ gigaset_free_channels(cs);
+ cs->mstate = MS_READY;
+ }
+ cs->mode = M_CID;
+ cs->cur_at_seq = SEQ_NONE;
+ break;
+ case ACT_UMODESET:
+ cs->mode = M_UNIMODEM;
+ cs->cur_at_seq = SEQ_NONE;
+ break;
+ case ACT_FAILCMODE:
+ cs->cur_at_seq = SEQ_NONE;
+ if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
+ init_failed(cs, M_UNKNOWN);
+ break;
+ }
+ if (reinit_and_retry(cs, -1) < 0)
+ schedule_init(cs, MS_RECOVER);
+ break;
+ case ACT_FAILUMODE:
+ cs->cur_at_seq = SEQ_NONE;
+ schedule_init(cs, MS_RECOVER);
+ break;
+ case ACT_HUPMODEM:
+ /* send "+++" (hangup in unimodem mode) */
+ if (cs->connected) {
+ struct cmdbuf_t *cb;
+
+ cb = kmalloc(sizeof(struct cmdbuf_t) + 3, GFP_ATOMIC);
+ if (!cb) {
+ dev_err(cs->dev, "%s: out of memory\n",
+ __func__);
+ return;
+ }
+ memcpy(cb->buf, "+++", 3);
+ cb->len = 3;
+ cb->offset = 0;
+ cb->next = NULL;
+ cb->wake_tasklet = NULL;
+ cs->ops->write_cmd(cs, cb);
+ }
+ break;
+ case ACT_RING:
+ /* get fresh AT state structure for new CID */
+ at_state = get_free_channel(cs, ev->parameter);
+ if (!at_state) {
+ dev_warn(cs->dev,
+ "RING ignored: could not allocate channel structure\n");
+ break;
+ }
+
+ /* initialize AT state structure
+ * note that bcs may be NULL if no B channel is free
+ */
+ at_state->ConState = 700;
+ for (i = 0; i < STR_NUM; ++i) {
+ kfree(at_state->str_var[i]);
+ at_state->str_var[i] = NULL;
+ }
+ at_state->int_var[VAR_ZCTP] = -1;
+
+ spin_lock_irqsave(&cs->lock, flags);
+ at_state->timer_expires = RING_TIMEOUT;
+ at_state->timer_active = 1;
+ spin_unlock_irqrestore(&cs->lock, flags);
+ break;
+ case ACT_ICALL:
+ handle_icall(cs, bcs, at_state);
+ break;
+ case ACT_FAILSDOWN:
+ dev_warn(cs->dev, "Could not shut down the device.\n");
+ /* fall through */
+ case ACT_FAKESDOWN:
+ case ACT_SDOWN:
+ cs->cur_at_seq = SEQ_NONE;
+ finish_shutdown(cs);
+ break;
+ case ACT_CONNECT:
+ if (cs->onechannel) {
+ at_state->pending_commands |= PC_DLE1;
+ cs->commands_pending = 1;
+ break;
+ }
+ bcs->chstate |= CHS_D_UP;
+ gigaset_isdn_connD(bcs);
+ cs->ops->init_bchannel(bcs);
+ break;
+ case ACT_DLE1:
+ cs->cur_at_seq = SEQ_NONE;
+ bcs = cs->bcs + cs->curchannel;
+
+ bcs->chstate |= CHS_D_UP;
+ gigaset_isdn_connD(bcs);
+ cs->ops->init_bchannel(bcs);
+ break;
+ case ACT_FAKEHUP:
+ at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
+ /* fall through */
+ case ACT_DISCONNECT:
+ cs->cur_at_seq = SEQ_NONE;
+ at_state->cid = -1;
+ if (!bcs) {
+ disconnect_nobc(p_at_state, cs);
+ } else if (cs->onechannel && cs->dle) {
+ /* Check for other open channels not needed:
+ * DLE only used for M10x with one B channel.
+ */
+ at_state->pending_commands |= PC_DLE0;
+ cs->commands_pending = 1;
+ } else {
+ disconnect_bc(at_state, cs, bcs);
+ }
+ break;
+ case ACT_FAKEDLE0:
+ at_state->int_var[VAR_ZDLE] = 0;
+ cs->dle = 0;
+ /* fall through */
+ case ACT_DLE0:
+ cs->cur_at_seq = SEQ_NONE;
+ bcs2 = cs->bcs + cs->curchannel;
+ disconnect_bc(&bcs2->at_state, cs, bcs2);
+ break;
+ case ACT_ABORTHUP:
+ cs->cur_at_seq = SEQ_NONE;
+ dev_warn(cs->dev, "Could not hang up.\n");
+ at_state->cid = -1;
+ if (!bcs)
+ disconnect_nobc(p_at_state, cs);
+ else if (cs->onechannel)
+ at_state->pending_commands |= PC_DLE0;
+ else
+ disconnect_bc(at_state, cs, bcs);
+ schedule_init(cs, MS_RECOVER);
+ break;
+ case ACT_FAILDLE0:
+ cs->cur_at_seq = SEQ_NONE;
+ dev_warn(cs->dev, "Error leaving DLE mode.\n");
+ cs->dle = 0;
+ bcs2 = cs->bcs + cs->curchannel;
+ disconnect_bc(&bcs2->at_state, cs, bcs2);
+ schedule_init(cs, MS_RECOVER);
+ break;
+ case ACT_FAILDLE1:
+ cs->cur_at_seq = SEQ_NONE;
+ dev_warn(cs->dev,
+ "Could not enter DLE mode. Trying to hang up.\n");
+ channel = cs->curchannel;
+ cs->bcs[channel].at_state.pending_commands |= PC_HUP;
+ cs->commands_pending = 1;
+ break;
+
+ case ACT_CID: /* got cid; start dialing */
+ cs->cur_at_seq = SEQ_NONE;
+ channel = cs->curchannel;
+ if (ev->parameter > 0 && ev->parameter <= 65535) {
+ cs->bcs[channel].at_state.cid = ev->parameter;
+ cs->bcs[channel].at_state.pending_commands |=
+ PC_DIAL;
+ cs->commands_pending = 1;
+ break;
+ }
+ /* fall through - bad cid */
+ case ACT_FAILCID:
+ cs->cur_at_seq = SEQ_NONE;
+ channel = cs->curchannel;
+ if (reinit_and_retry(cs, channel) < 0) {
+ dev_warn(cs->dev,
+ "Could not get a call ID. Cannot dial.\n");
+ bcs2 = cs->bcs + channel;
+ disconnect_bc(&bcs2->at_state, cs, bcs2);
+ }
+ break;
+ case ACT_ABORTCID:
+ cs->cur_at_seq = SEQ_NONE;
+ bcs2 = cs->bcs + cs->curchannel;
+ disconnect_bc(&bcs2->at_state, cs, bcs2);
+ break;
+
+ case ACT_DIALING:
+ case ACT_ACCEPTED:
+ cs->cur_at_seq = SEQ_NONE;
+ break;
+
+ case ACT_ABORTACCEPT: /* hangup/error/timeout during ICALL procssng */
+ if (bcs)
+ disconnect_bc(at_state, cs, bcs);
+ else
+ disconnect_nobc(p_at_state, cs);
+ break;
+
+ case ACT_ABORTDIAL: /* error/timeout during dial preparation */
+ cs->cur_at_seq = SEQ_NONE;
+ at_state->pending_commands |= PC_HUP;
+ cs->commands_pending = 1;
+ break;
+
+ case ACT_REMOTEREJECT: /* DISCONNECT_IND after dialling */
+ case ACT_CONNTIMEOUT: /* timeout waiting for ZSAU=ACTIVE */
+ case ACT_REMOTEHUP: /* DISCONNECT_IND with established connection */
+ at_state->pending_commands |= PC_HUP;
+ cs->commands_pending = 1;
+ break;
+ case ACT_GETSTRING: /* warning: RING, ZDLE, ...
+ are not handled properly anymore */
+ at_state->getstring = 1;
+ break;
+ case ACT_SETVER:
+ if (!ev->ptr) {
+ *p_genresp = 1;
+ *p_resp_code = RSP_ERROR;
+ break;
+ }
+ s = ev->ptr;
+
+ if (!strcmp(s, "OK")) {
+ /* OK without version string: assume old response */
+ *p_genresp = 1;
+ *p_resp_code = RSP_NONE;
+ break;
+ }
+
+ for (i = 0; i < 4; ++i) {
+ val = simple_strtoul(s, (char **) &e, 10);
+ if (val > INT_MAX || e == s)
+ break;
+ if (i == 3) {
+ if (*e)
+ break;
+ } else if (*e != '.')
+ break;
+ else
+ s = e + 1;
+ cs->fwver[i] = val;
+ }
+ if (i != 4) {
+ *p_genresp = 1;
+ *p_resp_code = RSP_ERROR;
+ break;
+ }
+ cs->gotfwver = 0;
+ break;
+ case ACT_GOTVER:
+ if (cs->gotfwver == 0) {
+ cs->gotfwver = 1;
+ gig_dbg(DEBUG_EVENT,
+ "firmware version %02d.%03d.%02d.%02d",
+ cs->fwver[0], cs->fwver[1],
+ cs->fwver[2], cs->fwver[3]);
+ break;
+ }
+ /* fall through */
+ case ACT_FAILVER:
+ cs->gotfwver = -1;
+ dev_err(cs->dev, "could not read firmware version.\n");
+ break;
+ case ACT_ERROR:
+ gig_dbg(DEBUG_ANY, "%s: ERROR response in ConState %d",
+ __func__, at_state->ConState);
+ cs->cur_at_seq = SEQ_NONE;
+ break;
+ case ACT_DEBUG:
+ gig_dbg(DEBUG_ANY, "%s: resp_code %d in ConState %d",
+ __func__, ev->type, at_state->ConState);
+ break;
+ case ACT_WARN:
+ dev_warn(cs->dev, "%s: resp_code %d in ConState %d!\n",
+ __func__, ev->type, at_state->ConState);
+ break;
+ case ACT_ZCAU:
+ dev_warn(cs->dev, "cause code %04x in connection state %d.\n",
+ ev->parameter, at_state->ConState);
+ break;
+
+ /* events from the LL */
+
+ case ACT_DIAL:
+ if (!ev->ptr) {
+ *p_genresp = 1;
+ *p_resp_code = RSP_ERROR;
+ break;
+ }
+ start_dial(at_state, ev->ptr, ev->parameter);
+ break;
+ case ACT_ACCEPT:
+ start_accept(at_state);
+ break;
+ case ACT_HUP:
+ at_state->pending_commands |= PC_HUP;
+ gig_dbg(DEBUG_EVENT, "Scheduling PC_HUP");
+ cs->commands_pending = 1;
+ break;
+
+ /* hotplug events */
+
+ case ACT_STOP:
+ do_stop(cs);
+ break;
+ case ACT_START:
+ do_start(cs);
+ break;
+
+ /* events from the interface */
+
+ case ACT_IF_LOCK:
+ cs->cmd_result = ev->parameter ? do_lock(cs) : do_unlock(cs);
+ cs->waiting = 0;
+ wake_up(&cs->waitqueue);
+ break;
+ case ACT_IF_VER:
+ if (ev->parameter != 0)
+ cs->cmd_result = -EINVAL;
+ else if (cs->gotfwver != 1) {
+ cs->cmd_result = -ENOENT;
+ } else {
+ memcpy(ev->arg, cs->fwver, sizeof cs->fwver);
+ cs->cmd_result = 0;
+ }
+ cs->waiting = 0;
+ wake_up(&cs->waitqueue);
+ break;
+
+ /* events from the proc file system */
+
+ case ACT_PROC_CIDMODE:
+ spin_lock_irqsave(&cs->lock, flags);
+ if (ev->parameter != cs->cidmode) {
+ cs->cidmode = ev->parameter;
+ if (ev->parameter) {
+ cs->at_state.pending_commands |= PC_CIDMODE;
+ gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
+ } else {
+ cs->at_state.pending_commands |= PC_UMMODE;
+ gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
+ }
+ cs->commands_pending = 1;
+ }
+ spin_unlock_irqrestore(&cs->lock, flags);
+ cs->waiting = 0;
+ wake_up(&cs->waitqueue);
+ break;
+
+ /* events from the hardware drivers */
+
+ case ACT_NOTIFY_BC_DOWN:
+ bchannel_down(bcs);
+ break;
+ case ACT_NOTIFY_BC_UP:
+ bchannel_up(bcs);
+ break;
+ case ACT_SHUTDOWN:
+ do_shutdown(cs);
+ break;
+
+
+ default:
+ if (action >= ACT_CMD && action < ACT_CMD + AT_NUM) {
+ *pp_command = at_state->bcs->commands[action - ACT_CMD];
+ if (!*pp_command) {
+ *p_genresp = 1;
+ *p_resp_code = RSP_NULL;
+ }
+ } else
+ dev_err(cs->dev, "%s: action==%d!\n", __func__, action);
+ }
+}
+
+/* State machine to do the calling and hangup procedure */
+static void process_event(struct cardstate *cs, struct event_t *ev)
+{
+ struct bc_state *bcs;
+ char *p_command = NULL;
+ struct reply_t *rep;
+ int rcode;
+ int genresp = 0;
+ int resp_code = RSP_ERROR;
+ struct at_state_t *at_state;
+ int index;
+ int curact;
+ unsigned long flags;
+
+ if (ev->cid >= 0) {
+ at_state = at_state_from_cid(cs, ev->cid);
+ if (!at_state) {
+ gig_dbg(DEBUG_EVENT, "event %d for invalid cid %d",
+ ev->type, ev->cid);
+ gigaset_add_event(cs, &cs->at_state, RSP_WRONG_CID,
+ NULL, 0, NULL);
+ return;
+ }
+ } else {
+ at_state = ev->at_state;
+ if (at_state_invalid(cs, at_state)) {
+ gig_dbg(DEBUG_EVENT, "event for invalid at_state %p",
+ at_state);
+ return;
+ }
+ }
+
+ gig_dbg(DEBUG_EVENT, "connection state %d, event %d",
+ at_state->ConState, ev->type);
+
+ bcs = at_state->bcs;
+
+ /* Setting the pointer to the dial array */
+ rep = at_state->replystruct;
+
+ spin_lock_irqsave(&cs->lock, flags);
+ if (ev->type == EV_TIMEOUT) {
+ if (ev->parameter != at_state->timer_index
+ || !at_state->timer_active) {
+ ev->type = RSP_NONE; /* old timeout */
+ gig_dbg(DEBUG_EVENT, "old timeout");
+ } else {
+ if (at_state->waiting)
+ gig_dbg(DEBUG_EVENT, "stopped waiting");
+ else
+ gig_dbg(DEBUG_EVENT, "timeout occurred");
+ }
+ }
+ spin_unlock_irqrestore(&cs->lock, flags);
+
+ /* if the response belongs to a variable in at_state->int_var[VAR_XXXX]
+ or at_state->str_var[STR_XXXX], set it */
+ if (ev->type >= RSP_VAR && ev->type < RSP_VAR + VAR_NUM) {
+ index = ev->type - RSP_VAR;
+ at_state->int_var[index] = ev->parameter;
+ } else if (ev->type >= RSP_STR && ev->type < RSP_STR + STR_NUM) {
+ index = ev->type - RSP_STR;
+ kfree(at_state->str_var[index]);
+ at_state->str_var[index] = ev->ptr;
+ ev->ptr = NULL; /* prevent process_events() from
+ deallocating ptr */
+ }
+
+ if (ev->type == EV_TIMEOUT || ev->type == RSP_STRING)
+ at_state->getstring = 0;
+
+ /* Search row in dial array which matches modem response and current
+ constate */
+ for (;; rep++) {
+ rcode = rep->resp_code;
+ if (rcode == RSP_LAST) {
+ /* found nothing...*/
+ dev_warn(cs->dev, "%s: rcode=RSP_LAST: "
+ "resp_code %d in ConState %d!\n",
+ __func__, ev->type, at_state->ConState);
+ return;
+ }
+ if ((rcode == RSP_ANY || rcode == ev->type)
+ && ((int) at_state->ConState >= rep->min_ConState)
+ && (rep->max_ConState < 0
+ || (int) at_state->ConState <= rep->max_ConState)
+ && (rep->parameter < 0 || rep->parameter == ev->parameter))
+ break;
+ }
+
+ p_command = rep->command;
+
+ at_state->waiting = 0;
+ for (curact = 0; curact < MAXACT; ++curact) {
+ /* The row tells us what we should do ..
+ */
+ do_action(rep->action[curact], cs, bcs, &at_state, &p_command,
+ &genresp, &resp_code, ev);
+ if (!at_state)
+ /* at_state destroyed by disconnect */
+ return;
+ }
+
+ /* Jump to the next con-state regarding the array */
+ if (rep->new_ConState >= 0)
+ at_state->ConState = rep->new_ConState;
+
+ if (genresp) {
+ spin_lock_irqsave(&cs->lock, flags);
+ at_state->timer_expires = 0;
+ at_state->timer_active = 0;
+ spin_unlock_irqrestore(&cs->lock, flags);
+ gigaset_add_event(cs, at_state, resp_code, NULL, 0, NULL);
+ } else {
+ /* Send command to modem if not NULL... */
+ if (p_command) {
+ if (cs->connected)
+ send_command(cs, p_command, at_state);
+ else
+ gigaset_add_event(cs, at_state, RSP_NODEV,
+ NULL, 0, NULL);
+ }
+
+ spin_lock_irqsave(&cs->lock, flags);
+ if (!rep->timeout) {
+ at_state->timer_expires = 0;
+ at_state->timer_active = 0;
+ } else if (rep->timeout > 0) { /* new timeout */
+ at_state->timer_expires = rep->timeout * 10;
+ at_state->timer_active = 1;
+ ++at_state->timer_index;
+ }
+ spin_unlock_irqrestore(&cs->lock, flags);
+ }
+}
+
+static void schedule_sequence(struct cardstate *cs,
+ struct at_state_t *at_state, int sequence)
+{
+ cs->cur_at_seq = sequence;
+ gigaset_add_event(cs, at_state, RSP_INIT, NULL, sequence, NULL);
+}
+
+static void process_command_flags(struct cardstate *cs)
+{
+ struct at_state_t *at_state = NULL;
+ struct bc_state *bcs;
+ int i;
+ int sequence;
+ unsigned long flags;
+
+ cs->commands_pending = 0;
+
+ if (cs->cur_at_seq) {
+ gig_dbg(DEBUG_EVENT, "not searching scheduled commands: busy");
+ return;
+ }
+
+ gig_dbg(DEBUG_EVENT, "searching scheduled commands");
+
+ sequence = SEQ_NONE;
+
+ /* clear pending_commands and hangup channels on shutdown */
+ if (cs->at_state.pending_commands & PC_SHUTDOWN) {
+ cs->at_state.pending_commands &= ~PC_CIDMODE;
+ for (i = 0; i < cs->channels; ++i) {
+ bcs = cs->bcs + i;
+ at_state = &bcs->at_state;
+ at_state->pending_commands &=
+ ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
+ if (at_state->cid > 0)
+ at_state->pending_commands |= PC_HUP;
+ if (at_state->pending_commands & PC_CID) {
+ at_state->pending_commands |= PC_NOCID;
+ at_state->pending_commands &= ~PC_CID;
+ }
+ }
+ }
+
+ /* clear pending_commands and hangup channels on reset */
+ if (cs->at_state.pending_commands & PC_INIT) {
+ cs->at_state.pending_commands &= ~PC_CIDMODE;
+ for (i = 0; i < cs->channels; ++i) {
+ bcs = cs->bcs + i;
+ at_state = &bcs->at_state;
+ at_state->pending_commands &=
+ ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
+ if (at_state->cid > 0)
+ at_state->pending_commands |= PC_HUP;
+ if (cs->mstate == MS_RECOVER) {
+ if (at_state->pending_commands & PC_CID) {
+ at_state->pending_commands |= PC_NOCID;
+ at_state->pending_commands &= ~PC_CID;
+ }
+ }
+ }
+ }
+
+ /* only switch back to unimodem mode if no commands are pending and
+ * no channels are up */
+ spin_lock_irqsave(&cs->lock, flags);
+ if (cs->at_state.pending_commands == PC_UMMODE
+ && !cs->cidmode
+ && list_empty(&cs->temp_at_states)
+ && cs->mode == M_CID) {
+ sequence = SEQ_UMMODE;
+ at_state = &cs->at_state;
+ for (i = 0; i < cs->channels; ++i) {
+ bcs = cs->bcs + i;
+ if (bcs->at_state.pending_commands ||
+ bcs->at_state.cid > 0) {
+ sequence = SEQ_NONE;
+ break;
+ }
+ }
+ }
+ spin_unlock_irqrestore(&cs->lock, flags);
+ cs->at_state.pending_commands &= ~PC_UMMODE;
+ if (sequence != SEQ_NONE) {
+ schedule_sequence(cs, at_state, sequence);
+ return;
+ }
+
+ for (i = 0; i < cs->channels; ++i) {
+ bcs = cs->bcs + i;
+ if (bcs->at_state.pending_commands & PC_HUP) {
+ if (cs->dle) {
+ cs->curchannel = bcs->channel;
+ schedule_sequence(cs, &cs->at_state, SEQ_DLE0);
+ return;
+ }
+ bcs->at_state.pending_commands &= ~PC_HUP;
+ if (bcs->at_state.pending_commands & PC_CID) {
+ /* not yet dialing: PC_NOCID is sufficient */
+ bcs->at_state.pending_commands |= PC_NOCID;
+ bcs->at_state.pending_commands &= ~PC_CID;
+ } else {
+ schedule_sequence(cs, &bcs->at_state, SEQ_HUP);
+ return;
+ }
+ }
+ if (bcs->at_state.pending_commands & PC_NOCID) {
+ bcs->at_state.pending_commands &= ~PC_NOCID;
+ cs->curchannel = bcs->channel;
+ schedule_sequence(cs, &cs->at_state, SEQ_NOCID);
+ return;
+ } else if (bcs->at_state.pending_commands & PC_DLE0) {
+ bcs->at_state.pending_commands &= ~PC_DLE0;
+ cs->curchannel = bcs->channel;
+ schedule_sequence(cs, &cs->at_state, SEQ_DLE0);
+ return;
+ }
+ }
+
+ list_for_each_entry(at_state, &cs->temp_at_states, list)
+ if (at_state->pending_commands & PC_HUP) {
+ at_state->pending_commands &= ~PC_HUP;
+ schedule_sequence(cs, at_state, SEQ_HUP);
+ return;
+ }
+
+ if (cs->at_state.pending_commands & PC_INIT) {
+ cs->at_state.pending_commands &= ~PC_INIT;
+ cs->dle = 0;
+ cs->inbuf->inputstate = INS_command;
+ schedule_sequence(cs, &cs->at_state, SEQ_INIT);
+ return;
+ }
+ if (cs->at_state.pending_commands & PC_SHUTDOWN) {
+ cs->at_state.pending_commands &= ~PC_SHUTDOWN;
+ schedule_sequence(cs, &cs->at_state, SEQ_SHUTDOWN);
+ return;
+ }
+ if (cs->at_state.pending_commands & PC_CIDMODE) {
+ cs->at_state.pending_commands &= ~PC_CIDMODE;
+ if (cs->mode == M_UNIMODEM) {
+ cs->retry_count = 1;
+ schedule_sequence(cs, &cs->at_state, SEQ_CIDMODE);
+ return;
+ }
+ }
+
+ for (i = 0; i < cs->channels; ++i) {
+ bcs = cs->bcs + i;
+ if (bcs->at_state.pending_commands & PC_DLE1) {
+ bcs->at_state.pending_commands &= ~PC_DLE1;
+ cs->curchannel = bcs->channel;
+ schedule_sequence(cs, &cs->at_state, SEQ_DLE1);
+ return;
+ }
+ if (bcs->at_state.pending_commands & PC_ACCEPT) {
+ bcs->at_state.pending_commands &= ~PC_ACCEPT;
+ schedule_sequence(cs, &bcs->at_state, SEQ_ACCEPT);
+ return;
+ }
+ if (bcs->at_state.pending_commands & PC_DIAL) {
+ bcs->at_state.pending_commands &= ~PC_DIAL;
+ schedule_sequence(cs, &bcs->at_state, SEQ_DIAL);
+ return;
+ }
+ if (bcs->at_state.pending_commands & PC_CID) {
+ switch (cs->mode) {
+ case M_UNIMODEM:
+ cs->at_state.pending_commands |= PC_CIDMODE;
+ gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
+ cs->commands_pending = 1;
+ return;
+ case M_UNKNOWN:
+ schedule_init(cs, MS_INIT);
+ return;
+ }
+ bcs->at_state.pending_commands &= ~PC_CID;
+ cs->curchannel = bcs->channel;
+ cs->retry_count = 2;
+ schedule_sequence(cs, &cs->at_state, SEQ_CID);
+ return;
+ }
+ }
+}
+
+static void process_events(struct cardstate *cs)
+{
+ struct event_t *ev;
+ unsigned head, tail;
+ int i;
+ int check_flags = 0;
+ int was_busy;
+ unsigned long flags;
+
+ spin_lock_irqsave(&cs->ev_lock, flags);
+ head = cs->ev_head;
+
+ for (i = 0; i < 2 * MAX_EVENTS; ++i) {
+ tail = cs->ev_tail;
+ if (tail == head) {
+ if (!check_flags && !cs->commands_pending)
+ break;
+ check_flags = 0;
+ spin_unlock_irqrestore(&cs->ev_lock, flags);
+ process_command_flags(cs);
+ spin_lock_irqsave(&cs->ev_lock, flags);
+ tail = cs->ev_tail;
+ if (tail == head) {
+ if (!cs->commands_pending)
+ break;
+ continue;
+ }
+ }
+
+ ev = cs->events + head;
+ was_busy = cs->cur_at_seq != SEQ_NONE;
+ spin_unlock_irqrestore(&cs->ev_lock, flags);
+ process_event(cs, ev);
+ spin_lock_irqsave(&cs->ev_lock, flags);
+ kfree(ev->ptr);
+ ev->ptr = NULL;
+ if (was_busy && cs->cur_at_seq == SEQ_NONE)
+ check_flags = 1;
+
+ head = (head + 1) % MAX_EVENTS;
+ cs->ev_head = head;
+ }
+
+ spin_unlock_irqrestore(&cs->ev_lock, flags);
+
+ if (i == 2 * MAX_EVENTS) {
+ dev_err(cs->dev,
+ "infinite loop in process_events; aborting.\n");
+ }
+}
+
+/* tasklet scheduled on any event received from the Gigaset device
+ * parameter:
+ * data ISDN controller state structure
+ */
+void gigaset_handle_event(unsigned long data)
+{
+ struct cardstate *cs = (struct cardstate *) data;
+
+ /* handle incoming data on control/common channel */
+ if (cs->inbuf->head != cs->inbuf->tail) {
+ gig_dbg(DEBUG_INTR, "processing new data");
+ cs->ops->handle_input(cs->inbuf);
+ }
+
+ process_events(cs);
+}
--- /dev/null
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
++/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Siemens Gigaset 307x driver
+ * Common header file for all connection variants
+ *
+ * Written by Stefan Eilers
+ * and Hansjoerg Lipp <hjlipp@web.de>
+ *
+ * =====================================================================
+ * =====================================================================
+ */
+
+#ifndef GIGASET_H
+#define GIGASET_H
+
+/* define global prefix for pr_ macros in linux/kernel.h */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/compiler.h>
+#include <linux/types.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/ppp_defs.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/list.h>
+#include <linux/atomic.h>
+
+#define GIG_VERSION {0, 5, 0, 0}
+#define GIG_COMPAT {0, 4, 0, 0}
+
+#define MAX_REC_PARAMS 10 /* Max. number of params in response string */
+#define MAX_RESP_SIZE 511 /* Max. size of a response string */
+
+#define MAX_EVENTS 64 /* size of event queue */
+
+#define RBUFSIZE 8192
+
+#define GIG_TICK 100 /* in milliseconds */
+
+/* timeout values (unit: 1 sec) */
+#define INIT_TIMEOUT 1
+
+/* timeout values (unit: 0.1 sec) */
+#define RING_TIMEOUT 3 /* for additional parameters to RING */
+#define BAS_TIMEOUT 20 /* for response to Base USB ops */
+#define ATRDY_TIMEOUT 3 /* for HD_READY_SEND_ATDATA */
+
+#define BAS_RETRY 3 /* max. retries for base USB ops */
+
+#define MAXACT 3
+
+extern int gigaset_debuglevel; /* "needs" cast to (enum debuglevel) */
+
+/* debug flags, combine by adding/bitwise OR */
+enum debuglevel {
+ DEBUG_INTR = 0x00008, /* interrupt processing */
+ DEBUG_CMD = 0x00020, /* sent/received LL commands */
+ DEBUG_STREAM = 0x00040, /* application data stream I/O events */
+ DEBUG_STREAM_DUMP = 0x00080, /* application data stream content */
+ DEBUG_LLDATA = 0x00100, /* sent/received LL data */
+ DEBUG_EVENT = 0x00200, /* event processing */
+ DEBUG_HDLC = 0x00800, /* M10x HDLC processing */
+ DEBUG_CHANNEL = 0x01000, /* channel allocation/deallocation */
+ DEBUG_TRANSCMD = 0x02000, /* AT-COMMANDS+RESPONSES */
+ DEBUG_MCMD = 0x04000, /* COMMANDS THAT ARE SENT VERY OFTEN */
+ DEBUG_INIT = 0x08000, /* (de)allocation+initialization of data
+ structures */
+ DEBUG_SUSPEND = 0x10000, /* suspend/resume processing */
+ DEBUG_OUTPUT = 0x20000, /* output to device */
+ DEBUG_ISO = 0x40000, /* isochronous transfers */
+ DEBUG_IF = 0x80000, /* character device operations */
+ DEBUG_USBREQ = 0x100000, /* USB communication (except payload
+ data) */
+ DEBUG_LOCKCMD = 0x200000, /* AT commands and responses when
+ MS_LOCKED */
+
+ DEBUG_ANY = 0x3fffff, /* print message if any of the others is
+ activated */
+};
+
+#ifdef CONFIG_GIGASET_DEBUG
+
+#define gig_dbg(level, format, arg...) \
+ do { \
+ if (unlikely(((enum debuglevel)gigaset_debuglevel) & (level))) \
+ printk(KERN_DEBUG KBUILD_MODNAME ": " format "\n", \
+ ## arg); \
+ } while (0)
+#define DEBUG_DEFAULT (DEBUG_TRANSCMD | DEBUG_CMD | DEBUG_USBREQ)
+
+#else
+
+#define gig_dbg(level, format, arg...) do {} while (0)
+#define DEBUG_DEFAULT 0
+
+#endif
+
+void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
+ size_t len, const unsigned char *buf);
+
+/* connection state */
+#define ZSAU_NONE 0
+#define ZSAU_PROCEEDING 1
+#define ZSAU_CALL_DELIVERED 2
+#define ZSAU_ACTIVE 3
+#define ZSAU_DISCONNECT_IND 4
+#define ZSAU_NULL 5
+#define ZSAU_DISCONNECT_REQ 6
+#define ZSAU_UNKNOWN -1
+
+/* USB control transfer requests */
+#define OUT_VENDOR_REQ (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
+#define IN_VENDOR_REQ (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
+
+/* interrupt pipe messages */
+#define HD_B1_FLOW_CONTROL 0x80
+#define HD_B2_FLOW_CONTROL 0x81
+#define HD_RECEIVEATDATA_ACK (0x35) /* 3070 */
+#define HD_READY_SEND_ATDATA (0x36) /* 3070 */
+#define HD_OPEN_ATCHANNEL_ACK (0x37) /* 3070 */
+#define HD_CLOSE_ATCHANNEL_ACK (0x38) /* 3070 */
+#define HD_DEVICE_INIT_OK (0x11) /* ISurf USB + 3070 */
+#define HD_OPEN_B1CHANNEL_ACK (0x51) /* ISurf USB + 3070 */
+#define HD_OPEN_B2CHANNEL_ACK (0x52) /* ISurf USB + 3070 */
+#define HD_CLOSE_B1CHANNEL_ACK (0x53) /* ISurf USB + 3070 */
+#define HD_CLOSE_B2CHANNEL_ACK (0x54) /* ISurf USB + 3070 */
+#define HD_SUSPEND_END (0x61) /* ISurf USB */
+#define HD_RESET_INTERRUPT_PIPE_ACK (0xFF) /* ISurf USB + 3070 */
+
+/* control requests */
+#define HD_OPEN_B1CHANNEL (0x23) /* ISurf USB + 3070 */
+#define HD_CLOSE_B1CHANNEL (0x24) /* ISurf USB + 3070 */
+#define HD_OPEN_B2CHANNEL (0x25) /* ISurf USB + 3070 */
+#define HD_CLOSE_B2CHANNEL (0x26) /* ISurf USB + 3070 */
+#define HD_RESET_INTERRUPT_PIPE (0x27) /* ISurf USB + 3070 */
+#define HD_DEVICE_INIT_ACK (0x34) /* ISurf USB + 3070 */
+#define HD_WRITE_ATMESSAGE (0x12) /* 3070 */
+#define HD_READ_ATMESSAGE (0x13) /* 3070 */
+#define HD_OPEN_ATCHANNEL (0x28) /* 3070 */
+#define HD_CLOSE_ATCHANNEL (0x29) /* 3070 */
+
+/* number of B channels supported by base driver */
+#define BAS_CHANNELS 2
+
+/* USB frames for isochronous transfer */
+#define BAS_FRAMETIME 1 /* number of milliseconds between frames */
+#define BAS_NUMFRAMES 8 /* number of frames per URB */
+#define BAS_MAXFRAME 16 /* allocated bytes per frame */
+#define BAS_NORMFRAME 8 /* send size without flow control */
+#define BAS_HIGHFRAME 10 /* " " with positive flow control */
+#define BAS_LOWFRAME 5 /* " " with negative flow control */
+#define BAS_CORRFRAMES 4 /* flow control multiplicator */
+
+#define BAS_INBUFSIZE (BAS_MAXFRAME * BAS_NUMFRAMES) /* size of isoc in buf
+ * per URB */
+#define BAS_OUTBUFSIZE 4096 /* size of common isoc out buffer */
+#define BAS_OUTBUFPAD BAS_MAXFRAME /* size of pad area for isoc out buf */
+
+#define BAS_INURBS 3
+#define BAS_OUTURBS 3
+
+/* variable commands in struct bc_state */
+#define AT_ISO 0
+#define AT_DIAL 1
+#define AT_MSN 2
+#define AT_BC 3
+#define AT_PROTO 4
+#define AT_TYPE 5
+#define AT_CLIP 6
+/* total number */
+#define AT_NUM 7
+
+/* variables in struct at_state_t */
+/* - numeric */
+#define VAR_ZSAU 0
+#define VAR_ZDLE 1
+#define VAR_ZCTP 2
+/* total number */
+#define VAR_NUM 3
+/* - string */
+#define STR_NMBR 0
+#define STR_ZCPN 1
+#define STR_ZCON 2
+#define STR_ZBC 3
+#define STR_ZHLC 4
+/* total number */
+#define STR_NUM 5
+
+/* event types */
+#define EV_TIMEOUT -105
+#define EV_IF_VER -106
+#define EV_PROC_CIDMODE -107
+#define EV_SHUTDOWN -108
+#define EV_START -110
+#define EV_STOP -111
+#define EV_IF_LOCK -112
+#define EV_ACCEPT -114
+#define EV_DIAL -115
+#define EV_HUP -116
+#define EV_BC_OPEN -117
+#define EV_BC_CLOSED -118
+
+/* input state */
+#define INS_command 0x0001 /* receiving messages (not payload data) */
+#define INS_DLE_char 0x0002 /* DLE flag received (in DLE mode) */
+#define INS_byte_stuff 0x0004
+#define INS_have_data 0x0008
+#define INS_DLE_command 0x0020 /* DLE message start (<DLE> X) received */
+#define INS_flag_hunt 0x0040
+
+/* channel state */
+#define CHS_D_UP 0x01
+#define CHS_B_UP 0x02
+#define CHS_NOTIFY_LL 0x04
+
+#define ICALL_REJECT 0
+#define ICALL_ACCEPT 1
+#define ICALL_IGNORE 2
+
+/* device state */
+#define MS_UNINITIALIZED 0
+#define MS_INIT 1
+#define MS_LOCKED 2
+#define MS_SHUTDOWN 3
+#define MS_RECOVER 4
+#define MS_READY 5
+
+/* mode */
+#define M_UNKNOWN 0
+#define M_CONFIG 1
+#define M_UNIMODEM 2
+#define M_CID 3
+
+/* start mode */
+#define SM_LOCKED 0
+#define SM_ISDN 1 /* default */
+
+/* layer 2 protocols (AT^SBPR=...) */
+#define L2_BITSYNC 0
+#define L2_HDLC 1
+#define L2_VOICE 2
+
+struct gigaset_ops;
+struct gigaset_driver;
+
+struct usb_cardstate;
+struct ser_cardstate;
+struct bas_cardstate;
+
+struct bc_state;
+struct usb_bc_state;
+struct ser_bc_state;
+struct bas_bc_state;
+
+struct reply_t {
+ int resp_code; /* RSP_XXXX */
+ int min_ConState; /* <0 => ignore */
+ int max_ConState; /* <0 => ignore */
+ int parameter; /* e.g. ZSAU_XXXX <0: ignore*/
+ int new_ConState; /* <0 => ignore */
+ int timeout; /* >0 => *HZ; <=0 => TOUT_XXXX*/
+ int action[MAXACT]; /* ACT_XXXX */
+ char *command; /* NULL==none */
+};
+
+extern struct reply_t gigaset_tab_cid[];
+extern struct reply_t gigaset_tab_nocid[];
+
+struct inbuf_t {
+ struct cardstate *cs;
+ int inputstate;
+ int head, tail;
+ unsigned char data[RBUFSIZE];
+};
+
+/* isochronous write buffer structure
+ * circular buffer with pad area for extraction of complete USB frames
+ * - data[read..nextread-1] is valid data already submitted to the USB subsystem
+ * - data[nextread..write-1] is valid data yet to be sent
+ * - data[write] is the next byte to write to
+ * - in byte-oriented L2 procotols, it is completely free
+ * - in bit-oriented L2 procotols, it may contain a partial byte of valid data
+ * - data[write+1..read-1] is free
+ * - wbits is the number of valid data bits in data[write], starting at the LSB
+ * - writesem is the semaphore for writing to the buffer:
+ * if writesem <= 0, data[write..read-1] is currently being written to
+ * - idle contains the byte value to repeat when the end of valid data is
+ * reached; if nextread==write (buffer contains no data to send), either the
+ * BAS_OUTBUFPAD bytes immediately before data[write] (if
+ * write>=BAS_OUTBUFPAD) or those of the pad area (if write<BAS_OUTBUFPAD)
+ * are also filled with that value
+ */
+struct isowbuf_t {
+ int read;
+ int nextread;
+ int write;
+ atomic_t writesem;
+ int wbits;
+ unsigned char data[BAS_OUTBUFSIZE + BAS_OUTBUFPAD];
+ unsigned char idle;
+};
+
+/* isochronous write URB context structure
+ * data to be stored along with the URB and retrieved when it is returned
+ * as completed by the USB subsystem
+ * - urb: pointer to the URB itself
+ * - bcs: pointer to the B Channel control structure
+ * - limit: end of write buffer area covered by this URB
+ * - status: URB completion status
+ */
+struct isow_urbctx_t {
+ struct urb *urb;
+ struct bc_state *bcs;
+ int limit;
+ int status;
+};
+
+/* AT state structure
+ * data associated with the state of an ISDN connection, whether or not
+ * it is currently assigned a B channel
+ */
+struct at_state_t {
+ struct list_head list;
+ int waiting;
+ int getstring;
+ unsigned timer_index;
+ unsigned long timer_expires;
+ int timer_active;
+ unsigned int ConState; /* State of connection */
+ struct reply_t *replystruct;
+ int cid;
+ int int_var[VAR_NUM]; /* see VAR_XXXX */
+ char *str_var[STR_NUM]; /* see STR_XXXX */
+ unsigned pending_commands; /* see PC_XXXX */
+ unsigned seq_index;
+
+ struct cardstate *cs;
+ struct bc_state *bcs;
+};
+
+struct event_t {
+ int type;
+ void *ptr, *arg;
+ int parameter;
+ int cid;
+ struct at_state_t *at_state;
+};
+
+/* This buffer holds all information about the used B-Channel */
+struct bc_state {
+ struct sk_buff *tx_skb; /* Current transfer buffer to modem */
+ struct sk_buff_head squeue; /* B-Channel send Queue */
+
+ /* Variables for debugging .. */
+ int corrupted; /* Counter for corrupted packages */
+ int trans_down; /* Counter of packages (downstream) */
+ int trans_up; /* Counter of packages (upstream) */
+
+ struct at_state_t at_state;
+
+ /* receive buffer */
+ unsigned rx_bufsize; /* max size accepted by application */
+ struct sk_buff *rx_skb;
+ __u16 rx_fcs;
+ int inputstate; /* see INS_XXXX */
+
+ int channel;
+
+ struct cardstate *cs;
+
+ unsigned chstate; /* bitmap (CHS_*) */
+ int ignore;
+ unsigned proto2; /* layer 2 protocol (L2_*) */
+ char *commands[AT_NUM]; /* see AT_XXXX */
+
+#ifdef CONFIG_GIGASET_DEBUG
+ int emptycount;
+#endif
+ int busy;
+ int use_count;
+
+ /* private data of hardware drivers */
+ union {
+ struct ser_bc_state *ser; /* serial hardware driver */
+ struct usb_bc_state *usb; /* usb hardware driver (m105) */
+ struct bas_bc_state *bas; /* usb hardware driver (base) */
+ } hw;
+
+ void *ap; /* associated LL application */
+ int apconnstate; /* LL application connection state */
+ spinlock_t aplock;
+};
+
+struct cardstate {
+ struct gigaset_driver *driver;
+ unsigned minor_index;
+ struct device *dev;
+ struct device *tty_dev;
+ unsigned flags;
+
+ const struct gigaset_ops *ops;
+
+ /* Stuff to handle communication */
+ wait_queue_head_t waitqueue;
+ int waiting;
+ int mode; /* see M_XXXX */
+ int mstate; /* Modem state: see MS_XXXX */
+ /* only changed by the event layer */
+ int cmd_result;
+
+ int channels;
+ struct bc_state *bcs; /* Array of struct bc_state */
+
+ int onechannel; /* data and commands transmitted in one
+ stream (M10x) */
+
+ spinlock_t lock;
+ struct at_state_t at_state; /* at_state_t for cid == 0 */
+ struct list_head temp_at_states;/* list of temporary "struct
+ at_state_t"s without B channel */
+
+ struct inbuf_t *inbuf;
+
+ struct cmdbuf_t *cmdbuf, *lastcmdbuf;
+ spinlock_t cmdlock;
+ unsigned curlen, cmdbytes;
+
+ struct tty_port port;
+ struct tasklet_struct if_wake_tasklet;
+ unsigned control_state;
+
+ unsigned fwver[4];
+ int gotfwver;
+
+ unsigned running; /* !=0 if events are handled */
+ unsigned connected; /* !=0 if hardware is connected */
+ unsigned isdn_up; /* !=0 after gigaset_isdn_start() */
+
+ unsigned cidmode;
+
+ int myid; /* id for communication with LL */
+ void *iif; /* LL interface structure */
+ unsigned short hw_hdr_len; /* headroom needed in data skbs */
+
+ struct reply_t *tabnocid;
+ struct reply_t *tabcid;
+ int cs_init;
+ int ignoreframes; /* frames to ignore after setting up the
+ B channel */
+ struct mutex mutex; /* locks this structure:
+ * connected is not changed,
+ * hardware_up is not changed,
+ * MState is not changed to or from
+ * MS_LOCKED */
+
+ struct timer_list timer;
+ int retry_count;
+ int dle; /* !=0 if DLE mode is active
+ (ZDLE=1 received -- M10x only) */
+ int cur_at_seq; /* sequence of AT commands being
+ processed */
+ int curchannel; /* channel those commands are meant
+ for */
+ int commands_pending; /* flag(s) in xxx.commands_pending have
+ been set */
+ struct tasklet_struct
+ event_tasklet; /* tasklet for serializing AT commands.
+ * Scheduled
+ * -> for modem reponses (and
+ * incoming data for M10x)
+ * -> on timeout
+ * -> after setting bits in
+ * xxx.at_state.pending_command
+ * (e.g. command from LL) */
+ struct tasklet_struct
+ write_tasklet; /* tasklet for serial output
+ * (not used in base driver) */
+
+ /* event queue */
+ struct event_t events[MAX_EVENTS];
+ unsigned ev_tail, ev_head;
+ spinlock_t ev_lock;
+
+ /* current modem response */
+ unsigned char respdata[MAX_RESP_SIZE + 1];
+ unsigned cbytes;
+
+ /* private data of hardware drivers */
+ union {
+ struct usb_cardstate *usb; /* USB hardware driver (m105) */
+ struct ser_cardstate *ser; /* serial hardware driver */
+ struct bas_cardstate *bas; /* USB hardware driver (base) */
+ } hw;
+};
+
+struct gigaset_driver {
+ struct list_head list;
+ spinlock_t lock; /* locks minor tables and blocked */
+ struct tty_driver *tty;
+ unsigned have_tty;
+ unsigned minor;
+ unsigned minors;
+ struct cardstate *cs;
+ int blocked;
+
+ const struct gigaset_ops *ops;
+ struct module *owner;
+};
+
+struct cmdbuf_t {
+ struct cmdbuf_t *next, *prev;
+ int len, offset;
+ struct tasklet_struct *wake_tasklet;
+ unsigned char buf[0];
+};
+
+struct bas_bc_state {
+ /* isochronous output state */
+ int running;
+ atomic_t corrbytes;
+ spinlock_t isooutlock;
+ struct isow_urbctx_t isoouturbs[BAS_OUTURBS];
+ struct isow_urbctx_t *isooutdone, *isooutfree, *isooutovfl;
+ struct isowbuf_t *isooutbuf;
+ unsigned numsub; /* submitted URB counter
+ (for diagnostic messages only) */
+ struct tasklet_struct sent_tasklet;
+
+ /* isochronous input state */
+ spinlock_t isoinlock;
+ struct urb *isoinurbs[BAS_INURBS];
+ unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS];
+ struct urb *isoindone; /* completed isoc read URB */
+ int isoinstatus; /* status of completed URB */
+ int loststatus; /* status of dropped URB */
+ unsigned isoinlost; /* number of bytes lost */
+ /* state of bit unstuffing algorithm
+ (in addition to BC_state.inputstate) */
+ unsigned seqlen; /* number of '1' bits not yet
+ unstuffed */
+ unsigned inbyte, inbits; /* collected bits for next byte */
+ /* statistics */
+ unsigned goodbytes; /* bytes correctly received */
+ unsigned alignerrs; /* frames with incomplete byte at end */
+ unsigned fcserrs; /* FCS errors */
+ unsigned frameerrs; /* framing errors */
+ unsigned giants; /* long frames */
+ unsigned runts; /* short frames */
+ unsigned aborts; /* HDLC aborts */
+ unsigned shared0s; /* '0' bits shared between flags */
+ unsigned stolen0s; /* '0' stuff bits also serving as
+ leading flag bits */
+ struct tasklet_struct rcvd_tasklet;
+};
+
+struct gigaset_ops {
+ /* Called from ev-layer.c/interface.c for sending AT commands to the
+ device */
+ int (*write_cmd)(struct cardstate *cs, struct cmdbuf_t *cb);
+
+ /* Called from interface.c for additional device control */
+ int (*write_room)(struct cardstate *cs);
+ int (*chars_in_buffer)(struct cardstate *cs);
+ int (*brkchars)(struct cardstate *cs, const unsigned char buf[6]);
+
+ /* Called from ev-layer.c after setting up connection
+ * Should call gigaset_bchannel_up(), when finished. */
+ int (*init_bchannel)(struct bc_state *bcs);
+
+ /* Called from ev-layer.c after hanging up
+ * Should call gigaset_bchannel_down(), when finished. */
+ int (*close_bchannel)(struct bc_state *bcs);
+
+ /* Called by gigaset_initcs() for setting up bcs->hw.xxx */
+ int (*initbcshw)(struct bc_state *bcs);
+
+ /* Called by gigaset_freecs() for freeing bcs->hw.xxx */
+ void (*freebcshw)(struct bc_state *bcs);
+
+ /* Called by gigaset_bchannel_down() for resetting bcs->hw.xxx */
+ void (*reinitbcshw)(struct bc_state *bcs);
+
+ /* Called by gigaset_initcs() for setting up cs->hw.xxx */
+ int (*initcshw)(struct cardstate *cs);
+
+ /* Called by gigaset_freecs() for freeing cs->hw.xxx */
+ void (*freecshw)(struct cardstate *cs);
+
+ /* Called from common.c/interface.c for additional serial port
+ control */
+ int (*set_modem_ctrl)(struct cardstate *cs, unsigned old_state,
+ unsigned new_state);
+ int (*baud_rate)(struct cardstate *cs, unsigned cflag);
+ int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag);
+
+ /* Called from LL interface to put an skb into the send-queue.
+ * After sending is completed, gigaset_skb_sent() must be called
+ * with the skb's link layer header preserved. */
+ int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb);
+
+ /* Called from ev-layer.c to process a block of data
+ * received through the common/control channel. */
+ void (*handle_input)(struct inbuf_t *inbuf);
+
+};
+
+/* = Common structures and definitions =======================================
+ */
+
+/* Parser states for DLE-Event:
+ * <DLE-EVENT>: <DLE_FLAG> "X" <EVENT> <DLE_FLAG> "."
+ * <DLE_FLAG>: 0x10
+ * <EVENT>: ((a-z)* | (A-Z)* | (0-10)*)+
+ */
+#define DLE_FLAG 0x10
+
+/* ===========================================================================
+ * Functions implemented in asyncdata.c
+ */
+
+/* Called from LL interface to put an skb into the send queue. */
+int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb);
+
+/* Called from ev-layer.c to process a block of data
+ * received through the common/control channel. */
+void gigaset_m10x_input(struct inbuf_t *inbuf);
+
+/* ===========================================================================
+ * Functions implemented in isocdata.c
+ */
+
+/* Called from LL interface to put an skb into the send queue. */
+int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb);
+
+/* Called from ev-layer.c to process a block of data
+ * received through the common/control channel. */
+void gigaset_isoc_input(struct inbuf_t *inbuf);
+
+/* Called from bas-gigaset.c to process a block of data
+ * received through the isochronous channel */
+void gigaset_isoc_receive(unsigned char *src, unsigned count,
+ struct bc_state *bcs);
+
+/* Called from bas-gigaset.c to put a block of data
+ * into the isochronous output buffer */
+int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len);
+
+/* Called from bas-gigaset.c to initialize the isochronous output buffer */
+void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle);
+
+/* Called from bas-gigaset.c to retrieve a block of bytes for sending */
+int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size);
+
+/* ===========================================================================
+ * Functions implemented in LL interface
+ */
+
+/* Called from common.c for setting up/shutting down with the ISDN subsystem */
+void gigaset_isdn_regdrv(void);
+void gigaset_isdn_unregdrv(void);
+int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid);
+void gigaset_isdn_unregdev(struct cardstate *cs);
+
+/* Called from hardware module to indicate completion of an skb */
+void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
+void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb);
+void gigaset_isdn_rcv_err(struct bc_state *bcs);
+
+/* Called from common.c/ev-layer.c to indicate events relevant to the LL */
+void gigaset_isdn_start(struct cardstate *cs);
+void gigaset_isdn_stop(struct cardstate *cs);
+int gigaset_isdn_icall(struct at_state_t *at_state);
+void gigaset_isdn_connD(struct bc_state *bcs);
+void gigaset_isdn_hupD(struct bc_state *bcs);
+void gigaset_isdn_connB(struct bc_state *bcs);
+void gigaset_isdn_hupB(struct bc_state *bcs);
+
+/* ===========================================================================
+ * Functions implemented in ev-layer.c
+ */
+
+/* tasklet called from common.c to process queued events */
+void gigaset_handle_event(unsigned long data);
+
+/* called from isocdata.c / asyncdata.c
+ * when a complete modem response line has been received */
+void gigaset_handle_modem_response(struct cardstate *cs);
+
+/* ===========================================================================
+ * Functions implemented in proc.c
+ */
+
+/* initialize sysfs for device */
+void gigaset_init_dev_sysfs(struct cardstate *cs);
+void gigaset_free_dev_sysfs(struct cardstate *cs);
+
+/* ===========================================================================
+ * Functions implemented in common.c/gigaset.h
+ */
+
+void gigaset_bcs_reinit(struct bc_state *bcs);
+void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
+ struct cardstate *cs, int cid);
+int gigaset_get_channel(struct bc_state *bcs);
+struct bc_state *gigaset_get_free_channel(struct cardstate *cs);
+void gigaset_free_channel(struct bc_state *bcs);
+int gigaset_get_channels(struct cardstate *cs);
+void gigaset_free_channels(struct cardstate *cs);
+void gigaset_block_channels(struct cardstate *cs);
+
+/* Allocate and initialize driver structure. */
+struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
+ const char *procname,
+ const char *devname,
+ const struct gigaset_ops *ops,
+ struct module *owner);
+
+/* Deallocate driver structure. */
+void gigaset_freedriver(struct gigaset_driver *drv);
+
+struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty);
+struct cardstate *gigaset_get_cs_by_id(int id);
+void gigaset_blockdriver(struct gigaset_driver *drv);
+
+/* Allocate and initialize card state. Calls hardware dependent
+ gigaset_init[b]cs(). */
+struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
+ int onechannel, int ignoreframes,
+ int cidmode, const char *modulename);
+
+/* Free card state. Calls hardware dependent gigaset_free[b]cs(). */
+void gigaset_freecs(struct cardstate *cs);
+
+/* Tell common.c that hardware and driver are ready. */
+int gigaset_start(struct cardstate *cs);
+
+/* Tell common.c that the device is not present any more. */
+void gigaset_stop(struct cardstate *cs);
+
+/* Tell common.c that the driver is being unloaded. */
+int gigaset_shutdown(struct cardstate *cs);
+
+/* Append event to the queue.
+ * Returns NULL on failure or a pointer to the event on success.
+ * ptr must be kmalloc()ed (and not be freed by the caller).
+ */
+struct event_t *gigaset_add_event(struct cardstate *cs,
+ struct at_state_t *at_state, int type,
+ void *ptr, int parameter, void *arg);
+
+/* Called on CONFIG1 command from frontend. */
+int gigaset_enterconfigmode(struct cardstate *cs);
+
+/* cs->lock must not be locked */
+static inline void gigaset_schedule_event(struct cardstate *cs)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&cs->lock, flags);
+ if (cs->running)
+ tasklet_schedule(&cs->event_tasklet);
+ spin_unlock_irqrestore(&cs->lock, flags);
+}
+
+/* Tell common.c that B channel has been closed. */
+/* cs->lock must not be locked */
+static inline void gigaset_bchannel_down(struct bc_state *bcs)
+{
+ gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_CLOSED, NULL, 0, NULL);
+ gigaset_schedule_event(bcs->cs);
+}
+
+/* Tell common.c that B channel has been opened. */
+/* cs->lock must not be locked */
+static inline void gigaset_bchannel_up(struct bc_state *bcs)
+{
+ gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_OPEN, NULL, 0, NULL);
+ gigaset_schedule_event(bcs->cs);
+}
+
+/* set up next receive skb for data mode */
+static inline struct sk_buff *gigaset_new_rx_skb(struct bc_state *bcs)
+{
+ struct cardstate *cs = bcs->cs;
+ unsigned short hw_hdr_len = cs->hw_hdr_len;
+
+ if (bcs->ignore) {
+ bcs->rx_skb = NULL;
+ } else {
+ bcs->rx_skb = dev_alloc_skb(bcs->rx_bufsize + hw_hdr_len);
+ if (bcs->rx_skb == NULL)
+ dev_warn(cs->dev, "could not allocate skb\n");
+ else
+ skb_reserve(bcs->rx_skb, hw_hdr_len);
+ }
+ return bcs->rx_skb;
+}
+
+/* append received bytes to inbuf */
+int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
+ unsigned numbytes);
+
+/* ===========================================================================
+ * Functions implemented in interface.c
+ */
+
+/* initialize interface */
+void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
+ const char *devname);
+/* release interface */
+void gigaset_if_freedriver(struct gigaset_driver *drv);
+/* add minor */
+void gigaset_if_init(struct cardstate *cs);
+/* remove minor */
+void gigaset_if_free(struct cardstate *cs);
+/* device received data */
+void gigaset_if_receive(struct cardstate *cs,
+ unsigned char *buffer, size_t len);
+
+#endif
--- /dev/null
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
++// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * interface to user space for the gigaset driver
+ *
+ * Copyright (c) 2004 by Hansjoerg Lipp <hjlipp@web.de>
+ *
+ * =====================================================================
+ * =====================================================================
+ */
+
+#include "gigaset.h"
+#include <linux/gigaset_dev.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+
+/*** our ioctls ***/
+
+static int if_lock(struct cardstate *cs, int *arg)
+{
+ int cmd = *arg;
+
+ gig_dbg(DEBUG_IF, "%u: if_lock (%d)", cs->minor_index, cmd);
+
+ if (cmd > 1)
+ return -EINVAL;
+
+ if (cmd < 0) {
+ *arg = cs->mstate == MS_LOCKED;
+ return 0;
+ }
+
+ if (!cmd && cs->mstate == MS_LOCKED && cs->connected) {
+ cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR | TIOCM_RTS);
+ cs->ops->baud_rate(cs, B115200);
+ cs->ops->set_line_ctrl(cs, CS8);
+ cs->control_state = TIOCM_DTR | TIOCM_RTS;
+ }
+
+ cs->waiting = 1;
+ if (!gigaset_add_event(cs, &cs->at_state, EV_IF_LOCK,
+ NULL, cmd, NULL)) {
+ cs->waiting = 0;
+ return -ENOMEM;
+ }
+ gigaset_schedule_event(cs);
+
+ wait_event(cs->waitqueue, !cs->waiting);
+
+ if (cs->cmd_result >= 0) {
+ *arg = cs->cmd_result;
+ return 0;
+ }
+
+ return cs->cmd_result;
+}
+
+static int if_version(struct cardstate *cs, unsigned arg[4])
+{
+ static const unsigned version[4] = GIG_VERSION;
+ static const unsigned compat[4] = GIG_COMPAT;
+ unsigned cmd = arg[0];
+
+ gig_dbg(DEBUG_IF, "%u: if_version (%d)", cs->minor_index, cmd);
+
+ switch (cmd) {
+ case GIGVER_DRIVER:
+ memcpy(arg, version, sizeof version);
+ return 0;
+ case GIGVER_COMPAT:
+ memcpy(arg, compat, sizeof compat);
+ return 0;
+ case GIGVER_FWBASE:
+ cs->waiting = 1;
+ if (!gigaset_add_event(cs, &cs->at_state, EV_IF_VER,
+ NULL, 0, arg)) {
+ cs->waiting = 0;
+ return -ENOMEM;
+ }
+ gigaset_schedule_event(cs);
+
+ wait_event(cs->waitqueue, !cs->waiting);
+
+ if (cs->cmd_result >= 0)
+ return 0;
+
+ return cs->cmd_result;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int if_config(struct cardstate *cs, int *arg)
+{
+ gig_dbg(DEBUG_IF, "%u: if_config (%d)", cs->minor_index, *arg);
+
+ if (*arg != 1)
+ return -EINVAL;
+
+ if (cs->mstate != MS_LOCKED)
+ return -EBUSY;
+
+ if (!cs->connected) {
+ pr_err("%s: not connected\n", __func__);
+ return -ENODEV;
+ }
+
+ *arg = 0;
+ return gigaset_enterconfigmode(cs);
+}
+
+/*** the terminal driver ***/
+
+static int if_open(struct tty_struct *tty, struct file *filp)
+{
+ struct cardstate *cs;
+
+ gig_dbg(DEBUG_IF, "%d+%d: %s()",
+ tty->driver->minor_start, tty->index, __func__);
+
+ cs = gigaset_get_cs_by_tty(tty);
+ if (!cs || !try_module_get(cs->driver->owner))
+ return -ENODEV;
+
+ if (mutex_lock_interruptible(&cs->mutex)) {
+ module_put(cs->driver->owner);
+ return -ERESTARTSYS;
+ }
+ tty->driver_data = cs;
+
+ ++cs->port.count;
+
+ if (cs->port.count == 1) {
+ tty_port_tty_set(&cs->port, tty);
+ cs->port.low_latency = 1;
+ }
+
+ mutex_unlock(&cs->mutex);
+ return 0;
+}
+
+static void if_close(struct tty_struct *tty, struct file *filp)
+{
+ struct cardstate *cs = tty->driver_data;
+
+ if (!cs) { /* happens if we didn't find cs in open */
+ gig_dbg(DEBUG_IF, "%s: no cardstate", __func__);
+ return;
+ }
+
+ gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
+
+ mutex_lock(&cs->mutex);
+
+ if (!cs->connected)
+ gig_dbg(DEBUG_IF, "not connected"); /* nothing to do */
+ else if (!cs->port.count)
+ dev_warn(cs->dev, "%s: device not opened\n", __func__);
+ else if (!--cs->port.count)
+ tty_port_tty_set(&cs->port, NULL);
+
+ mutex_unlock(&cs->mutex);
+
+ module_put(cs->driver->owner);
+}
+
+static int if_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct cardstate *cs = tty->driver_data;
+ int retval = -ENODEV;
+ int int_arg;
+ unsigned char buf[6];
+ unsigned version[4];
+
+ gig_dbg(DEBUG_IF, "%u: %s(0x%x)", cs->minor_index, __func__, cmd);
+
+ if (mutex_lock_interruptible(&cs->mutex))
+ return -ERESTARTSYS;
+
+ if (!cs->connected) {
+ gig_dbg(DEBUG_IF, "not connected");
+ retval = -ENODEV;
+ } else {
+ retval = 0;
+ switch (cmd) {
+ case GIGASET_REDIR:
+ retval = get_user(int_arg, (int __user *) arg);
+ if (retval >= 0)
+ retval = if_lock(cs, &int_arg);
+ if (retval >= 0)
+ retval = put_user(int_arg, (int __user *) arg);
+ break;
+ case GIGASET_CONFIG:
+ retval = get_user(int_arg, (int __user *) arg);
+ if (retval >= 0)
+ retval = if_config(cs, &int_arg);
+ if (retval >= 0)
+ retval = put_user(int_arg, (int __user *) arg);
+ break;
+ case GIGASET_BRKCHARS:
+ retval = copy_from_user(&buf,
+ (const unsigned char __user *) arg, 6)
+ ? -EFAULT : 0;
+ if (retval >= 0) {
+ gigaset_dbg_buffer(DEBUG_IF, "GIGASET_BRKCHARS",
+ 6, buf);
+ retval = cs->ops->brkchars(cs, buf);
+ }
+ break;
+ case GIGASET_VERSION:
+ retval = copy_from_user(version,
+ (unsigned __user *) arg, sizeof version)
+ ? -EFAULT : 0;
+ if (retval >= 0)
+ retval = if_version(cs, version);
+ if (retval >= 0)
+ retval = copy_to_user((unsigned __user *) arg,
+ version, sizeof version)
+ ? -EFAULT : 0;
+ break;
+ default:
+ gig_dbg(DEBUG_IF, "%s: arg not supported - 0x%04x",
+ __func__, cmd);
+ retval = -ENOIOCTLCMD;
+ }
+ }
+
+ mutex_unlock(&cs->mutex);
+
+ return retval;
+}
+
+#ifdef CONFIG_COMPAT
+static long if_compat_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ return if_ioctl(tty, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
+static int if_tiocmget(struct tty_struct *tty)
+{
+ struct cardstate *cs = tty->driver_data;
+ int retval;
+
+ gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
+
+ if (mutex_lock_interruptible(&cs->mutex))
+ return -ERESTARTSYS;
+
+ retval = cs->control_state & (TIOCM_RTS | TIOCM_DTR);
+
+ mutex_unlock(&cs->mutex);
+
+ return retval;
+}
+
+static int if_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct cardstate *cs = tty->driver_data;
+ int retval;
+ unsigned mc;
+
+ gig_dbg(DEBUG_IF, "%u: %s(0x%x, 0x%x)",
+ cs->minor_index, __func__, set, clear);
+
+ if (mutex_lock_interruptible(&cs->mutex))
+ return -ERESTARTSYS;
+
+ if (!cs->connected) {
+ gig_dbg(DEBUG_IF, "not connected");
+ retval = -ENODEV;
+ } else {
+ mc = (cs->control_state | set) & ~clear & (TIOCM_RTS | TIOCM_DTR);
+ retval = cs->ops->set_modem_ctrl(cs, cs->control_state, mc);
+ cs->control_state = mc;
+ }
+
+ mutex_unlock(&cs->mutex);
+
+ return retval;
+}
+
+static int if_write(struct tty_struct *tty, const unsigned char *buf, int count)
+{
+ struct cardstate *cs = tty->driver_data;
+ struct cmdbuf_t *cb;
+ int retval;
+
+ gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
+
+ if (mutex_lock_interruptible(&cs->mutex))
+ return -ERESTARTSYS;
+
+ if (!cs->connected) {
+ gig_dbg(DEBUG_IF, "not connected");
+ retval = -ENODEV;
+ goto done;
+ }
+ if (cs->mstate != MS_LOCKED) {
+ dev_warn(cs->dev, "can't write to unlocked device\n");
+ retval = -EBUSY;
+ goto done;
+ }
+ if (count <= 0) {
+ /* nothing to do */
+ retval = 0;
+ goto done;
+ }
+
+ cb = kmalloc(sizeof(struct cmdbuf_t) + count, GFP_KERNEL);
+ if (!cb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ retval = -ENOMEM;
+ goto done;
+ }
+
+ memcpy(cb->buf, buf, count);
+ cb->len = count;
+ cb->offset = 0;
+ cb->next = NULL;
+ cb->wake_tasklet = &cs->if_wake_tasklet;
+ retval = cs->ops->write_cmd(cs, cb);
+done:
+ mutex_unlock(&cs->mutex);
+ return retval;
+}
+
+static int if_write_room(struct tty_struct *tty)
+{
+ struct cardstate *cs = tty->driver_data;
+ int retval;
+
+ gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
+
+ if (mutex_lock_interruptible(&cs->mutex))
+ return -ERESTARTSYS;
+
+ if (!cs->connected) {
+ gig_dbg(DEBUG_IF, "not connected");
+ retval = -ENODEV;
+ } else if (cs->mstate != MS_LOCKED) {
+ dev_warn(cs->dev, "can't write to unlocked device\n");
+ retval = -EBUSY;
+ } else
+ retval = cs->ops->write_room(cs);
+
+ mutex_unlock(&cs->mutex);
+
+ return retval;
+}
+
+static int if_chars_in_buffer(struct tty_struct *tty)
+{
+ struct cardstate *cs = tty->driver_data;
+ int retval = 0;
+
+ gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
+
+ mutex_lock(&cs->mutex);
+
+ if (!cs->connected)
+ gig_dbg(DEBUG_IF, "not connected");
+ else if (cs->mstate != MS_LOCKED)
+ dev_warn(cs->dev, "can't write to unlocked device\n");
+ else
+ retval = cs->ops->chars_in_buffer(cs);
+
+ mutex_unlock(&cs->mutex);
+
+ return retval;
+}
+
+static void if_throttle(struct tty_struct *tty)
+{
+ struct cardstate *cs = tty->driver_data;
+
+ gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
+
+ mutex_lock(&cs->mutex);
+
+ if (!cs->connected)
+ gig_dbg(DEBUG_IF, "not connected"); /* nothing to do */
+ else
+ gig_dbg(DEBUG_IF, "%s: not implemented\n", __func__);
+
+ mutex_unlock(&cs->mutex);
+}
+
+static void if_unthrottle(struct tty_struct *tty)
+{
+ struct cardstate *cs = tty->driver_data;
+
+ gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
+
+ mutex_lock(&cs->mutex);
+
+ if (!cs->connected)
+ gig_dbg(DEBUG_IF, "not connected"); /* nothing to do */
+ else
+ gig_dbg(DEBUG_IF, "%s: not implemented\n", __func__);
+
+ mutex_unlock(&cs->mutex);
+}
+
+static void if_set_termios(struct tty_struct *tty, struct ktermios *old)
+{
+ struct cardstate *cs = tty->driver_data;
+ unsigned int iflag;
+ unsigned int cflag;
+ unsigned int old_cflag;
+ unsigned int control_state, new_state;
+
+ gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
+
+ mutex_lock(&cs->mutex);
+
+ if (!cs->connected) {
+ gig_dbg(DEBUG_IF, "not connected");
+ goto out;
+ }
+
+ iflag = tty->termios.c_iflag;
+ cflag = tty->termios.c_cflag;
+ old_cflag = old ? old->c_cflag : cflag;
+ gig_dbg(DEBUG_IF, "%u: iflag %x cflag %x old %x",
+ cs->minor_index, iflag, cflag, old_cflag);
+
+ /* get a local copy of the current port settings */
+ control_state = cs->control_state;
+
+ /*
+ * Update baud rate.
+ * Do not attempt to cache old rates and skip settings,
+ * disconnects screw such tricks up completely.
+ * Premature optimization is the root of all evil.
+ */
+
+ /* reassert DTR and (maybe) RTS on transition from B0 */
+ if ((old_cflag & CBAUD) == B0) {
+ new_state = control_state | TIOCM_DTR;
+ /* don't set RTS if using hardware flow control */
+ if (!(old_cflag & CRTSCTS))
+ new_state |= TIOCM_RTS;
+ gig_dbg(DEBUG_IF, "%u: from B0 - set DTR%s",
+ cs->minor_index,
+ (new_state & TIOCM_RTS) ? " only" : "/RTS");
+ cs->ops->set_modem_ctrl(cs, control_state, new_state);
+ control_state = new_state;
+ }
+
+ cs->ops->baud_rate(cs, cflag & CBAUD);
+
+ if ((cflag & CBAUD) == B0) {
+ /* Drop RTS and DTR */
+ gig_dbg(DEBUG_IF, "%u: to B0 - drop DTR/RTS", cs->minor_index);
+ new_state = control_state & ~(TIOCM_DTR | TIOCM_RTS);
+ cs->ops->set_modem_ctrl(cs, control_state, new_state);
+ control_state = new_state;
+ }
+
+ /*
+ * Update line control register (LCR)
+ */
+
+ cs->ops->set_line_ctrl(cs, cflag);
+
+ /* save off the modified port settings */
+ cs->control_state = control_state;
+
+out:
+ mutex_unlock(&cs->mutex);
+}
+
+static const struct tty_operations if_ops = {
+ .open = if_open,
+ .close = if_close,
+ .ioctl = if_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = if_compat_ioctl,
+#endif
+ .write = if_write,
+ .write_room = if_write_room,
+ .chars_in_buffer = if_chars_in_buffer,
+ .set_termios = if_set_termios,
+ .throttle = if_throttle,
+ .unthrottle = if_unthrottle,
+ .tiocmget = if_tiocmget,
+ .tiocmset = if_tiocmset,
+};
+
+
+/* wakeup tasklet for the write operation */
+static void if_wake(unsigned long data)
+{
+ struct cardstate *cs = (struct cardstate *)data;
+
+ tty_port_tty_wakeup(&cs->port);
+}
+
+/*** interface to common ***/
+
+void gigaset_if_init(struct cardstate *cs)
+{
+ struct gigaset_driver *drv;
+
+ drv = cs->driver;
+ if (!drv->have_tty)
+ return;
+
+ tasklet_init(&cs->if_wake_tasklet, if_wake, (unsigned long) cs);
+
+ mutex_lock(&cs->mutex);
+ cs->tty_dev = tty_port_register_device(&cs->port, drv->tty,
+ cs->minor_index, NULL);
+
+ if (!IS_ERR(cs->tty_dev))
+ dev_set_drvdata(cs->tty_dev, cs);
+ else {
+ pr_warning("could not register device to the tty subsystem\n");
+ cs->tty_dev = NULL;
+ }
+ mutex_unlock(&cs->mutex);
+}
+
+void gigaset_if_free(struct cardstate *cs)
+{
+ struct gigaset_driver *drv;
+
+ drv = cs->driver;
+ if (!drv->have_tty)
+ return;
+
+ tasklet_disable(&cs->if_wake_tasklet);
+ tasklet_kill(&cs->if_wake_tasklet);
+ cs->tty_dev = NULL;
+ tty_unregister_device(drv->tty, cs->minor_index);
+}
+
+/**
+ * gigaset_if_receive() - pass a received block of data to the tty device
+ * @cs: device descriptor structure.
+ * @buffer: received data.
+ * @len: number of bytes received.
+ *
+ * Called by asyncdata/isocdata if a block of data received from the
+ * device must be sent to userspace through the ttyG* device.
+ */
+void gigaset_if_receive(struct cardstate *cs,
+ unsigned char *buffer, size_t len)
+{
+ tty_insert_flip_string(&cs->port, buffer, len);
+ tty_flip_buffer_push(&cs->port);
+}
+EXPORT_SYMBOL_GPL(gigaset_if_receive);
+
+/* gigaset_if_initdriver
+ * Initialize tty interface.
+ * parameters:
+ * drv Driver
+ * procname Name of the driver (e.g. for /proc/tty/drivers)
+ * devname Name of the device files (prefix without minor number)
+ */
+void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
+ const char *devname)
+{
+ int ret;
+ struct tty_driver *tty;
+
+ drv->have_tty = 0;
+
+ drv->tty = tty = alloc_tty_driver(drv->minors);
+ if (tty == NULL)
+ goto enomem;
+
+ tty->type = TTY_DRIVER_TYPE_SERIAL;
+ tty->subtype = SERIAL_TYPE_NORMAL;
+ tty->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+
+ tty->driver_name = procname;
+ tty->name = devname;
+ tty->minor_start = drv->minor;
+
+ tty->init_termios = tty_std_termios;
+ tty->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ tty_set_operations(tty, &if_ops);
+
+ ret = tty_register_driver(tty);
+ if (ret < 0) {
+ pr_err("error %d registering tty driver\n", ret);
+ goto error;
+ }
+ gig_dbg(DEBUG_IF, "tty driver initialized");
+ drv->have_tty = 1;
+ return;
+
+enomem:
+ pr_err("out of memory\n");
+error:
+ if (drv->tty)
+ put_tty_driver(drv->tty);
+}
+
+void gigaset_if_freedriver(struct gigaset_driver *drv)
+{
+ if (!drv->have_tty)
+ return;
+
+ drv->have_tty = 0;
+ tty_unregister_driver(drv->tty);
+ put_tty_driver(drv->tty);
+}
--- /dev/null
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
++// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Common data handling layer for bas_gigaset
+ *
+ * Copyright (c) 2005 by Tilman Schmidt <tilman@imap.cc>,
+ * Hansjoerg Lipp <hjlipp@web.de>.
+ *
+ * =====================================================================
+ * =====================================================================
+ */
+
+#include "gigaset.h"
+#include <linux/crc-ccitt.h>
+#include <linux/bitrev.h>
+
+/* access methods for isowbuf_t */
+/* ============================ */
+
+/* initialize buffer structure
+ */
+void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle)
+{
+ iwb->read = 0;
+ iwb->nextread = 0;
+ iwb->write = 0;
+ atomic_set(&iwb->writesem, 1);
+ iwb->wbits = 0;
+ iwb->idle = idle;
+ memset(iwb->data + BAS_OUTBUFSIZE, idle, BAS_OUTBUFPAD);
+}
+
+/* compute number of bytes which can be appended to buffer
+ * so that there is still room to append a maximum frame of flags
+ */
+static inline int isowbuf_freebytes(struct isowbuf_t *iwb)
+{
+ int read, write, freebytes;
+
+ read = iwb->read;
+ write = iwb->write;
+ freebytes = read - write;
+ if (freebytes > 0) {
+ /* no wraparound: need padding space within regular area */
+ return freebytes - BAS_OUTBUFPAD;
+ } else if (read < BAS_OUTBUFPAD) {
+ /* wraparound: can use space up to end of regular area */
+ return BAS_OUTBUFSIZE - write;
+ } else {
+ /* following the wraparound yields more space */
+ return freebytes + BAS_OUTBUFSIZE - BAS_OUTBUFPAD;
+ }
+}
+
+/* start writing
+ * acquire the write semaphore
+ * return 0 if acquired, <0 if busy
+ */
+static inline int isowbuf_startwrite(struct isowbuf_t *iwb)
+{
+ if (!atomic_dec_and_test(&iwb->writesem)) {
+ atomic_inc(&iwb->writesem);
+ gig_dbg(DEBUG_ISO, "%s: couldn't acquire iso write semaphore",
+ __func__);
+ return -EBUSY;
+ }
+ gig_dbg(DEBUG_ISO,
+ "%s: acquired iso write semaphore, data[write]=%02x, nbits=%d",
+ __func__, iwb->data[iwb->write], iwb->wbits);
+ return 0;
+}
+
+/* finish writing
+ * release the write semaphore
+ * returns the current write position
+ */
+static inline int isowbuf_donewrite(struct isowbuf_t *iwb)
+{
+ int write = iwb->write;
+ atomic_inc(&iwb->writesem);
+ return write;
+}
+
+/* append bits to buffer without any checks
+ * - data contains bits to append, starting at LSB
+ * - nbits is number of bits to append (0..24)
+ * must be called with the write semaphore held
+ * If more than nbits bits are set in data, the extraneous bits are set in the
+ * buffer too, but the write position is only advanced by nbits.
+ */
+static inline void isowbuf_putbits(struct isowbuf_t *iwb, u32 data, int nbits)
+{
+ int write = iwb->write;
+ data <<= iwb->wbits;
+ data |= iwb->data[write];
+ nbits += iwb->wbits;
+ while (nbits >= 8) {
+ iwb->data[write++] = data & 0xff;
+ write %= BAS_OUTBUFSIZE;
+ data >>= 8;
+ nbits -= 8;
+ }
+ iwb->wbits = nbits;
+ iwb->data[write] = data & 0xff;
+ iwb->write = write;
+}
+
+/* put final flag on HDLC bitstream
+ * also sets the idle fill byte to the correspondingly shifted flag pattern
+ * must be called with the write semaphore held
+ */
+static inline void isowbuf_putflag(struct isowbuf_t *iwb)
+{
+ int write;
+
+ /* add two flags, thus reliably covering one byte */
+ isowbuf_putbits(iwb, 0x7e7e, 8);
+ /* recover the idle flag byte */
+ write = iwb->write;
+ iwb->idle = iwb->data[write];
+ gig_dbg(DEBUG_ISO, "idle fill byte %02x", iwb->idle);
+ /* mask extraneous bits in buffer */
+ iwb->data[write] &= (1 << iwb->wbits) - 1;
+}
+
+/* retrieve a block of bytes for sending
+ * The requested number of bytes is provided as a contiguous block.
+ * If necessary, the frame is filled to the requested number of bytes
+ * with the idle value.
+ * returns offset to frame, < 0 on busy or error
+ */
+int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size)
+{
+ int read, write, limit, src, dst;
+ unsigned char pbyte;
+
+ read = iwb->nextread;
+ write = iwb->write;
+ if (likely(read == write)) {
+ /* return idle frame */
+ return read < BAS_OUTBUFPAD ?
+ BAS_OUTBUFSIZE : read - BAS_OUTBUFPAD;
+ }
+
+ limit = read + size;
+ gig_dbg(DEBUG_STREAM, "%s: read=%d write=%d limit=%d",
+ __func__, read, write, limit);
+#ifdef CONFIG_GIGASET_DEBUG
+ if (unlikely(size < 0 || size > BAS_OUTBUFPAD)) {
+ pr_err("invalid size %d\n", size);
+ return -EINVAL;
+ }
+#endif
+
+ if (read < write) {
+ /* no wraparound in valid data */
+ if (limit >= write) {
+ /* append idle frame */
+ if (isowbuf_startwrite(iwb) < 0)
+ return -EBUSY;
+ /* write position could have changed */
+ write = iwb->write;
+ if (limit >= write) {
+ pbyte = iwb->data[write]; /* save
+ partial byte */
+ limit = write + BAS_OUTBUFPAD;
+ gig_dbg(DEBUG_STREAM,
+ "%s: filling %d->%d with %02x",
+ __func__, write, limit, iwb->idle);
+ if (write + BAS_OUTBUFPAD < BAS_OUTBUFSIZE)
+ memset(iwb->data + write, iwb->idle,
+ BAS_OUTBUFPAD);
+ else {
+ /* wraparound, fill entire pad area */
+ memset(iwb->data + write, iwb->idle,
+ BAS_OUTBUFSIZE + BAS_OUTBUFPAD
+ - write);
+ limit = 0;
+ }
+ gig_dbg(DEBUG_STREAM,
+ "%s: restoring %02x at %d",
+ __func__, pbyte, limit);
+ iwb->data[limit] = pbyte; /* restore
+ partial byte */
+ iwb->write = limit;
+ }
+ isowbuf_donewrite(iwb);
+ }
+ } else {
+ /* valid data wraparound */
+ if (limit >= BAS_OUTBUFSIZE) {
+ /* copy wrapped part into pad area */
+ src = 0;
+ dst = BAS_OUTBUFSIZE;
+ while (dst < limit && src < write)
+ iwb->data[dst++] = iwb->data[src++];
+ if (dst <= limit) {
+ /* fill pad area with idle byte */
+ memset(iwb->data + dst, iwb->idle,
+ BAS_OUTBUFSIZE + BAS_OUTBUFPAD - dst);
+ }
+ limit = src;
+ }
+ }
+ iwb->nextread = limit;
+ return read;
+}
+
+/* dump_bytes
+ * write hex bytes to syslog for debugging
+ */
+static inline void dump_bytes(enum debuglevel level, const char *tag,
+ unsigned char *bytes, int count)
+{
+#ifdef CONFIG_GIGASET_DEBUG
+ unsigned char c;
+ static char dbgline[3 * 32 + 1];
+ int i = 0;
+
+ if (!(gigaset_debuglevel & level))
+ return;
+
+ while (count-- > 0) {
+ if (i > sizeof(dbgline) - 4) {
+ dbgline[i] = '\0';
+ gig_dbg(level, "%s:%s", tag, dbgline);
+ i = 0;
+ }
+ c = *bytes++;
+ dbgline[i] = (i && !(i % 12)) ? '-' : ' ';
+ i++;
+ dbgline[i++] = hex_asc_hi(c);
+ dbgline[i++] = hex_asc_lo(c);
+ }
+ dbgline[i] = '\0';
+ gig_dbg(level, "%s:%s", tag, dbgline);
+#endif
+}
+
+/*============================================================================*/
+
+/* bytewise HDLC bitstuffing via table lookup
+ * lookup table: 5 subtables for 0..4 preceding consecutive '1' bits
+ * index: 256*(number of preceding '1' bits) + (next byte to stuff)
+ * value: bit 9.. 0 = result bits
+ * bit 12..10 = number of trailing '1' bits in result
+ * bit 14..13 = number of bits added by stuffing
+ */
+static const u16 stufftab[5 * 256] = {
+/* previous 1s = 0: */
+ 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
+ 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x201f,
+ 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
+ 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x203e, 0x205f,
+ 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
+ 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x209f,
+ 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
+ 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, 0x0078, 0x0079, 0x007a, 0x007b, 0x207c, 0x207d, 0x20be, 0x20df,
+ 0x0480, 0x0481, 0x0482, 0x0483, 0x0484, 0x0485, 0x0486, 0x0487, 0x0488, 0x0489, 0x048a, 0x048b, 0x048c, 0x048d, 0x048e, 0x048f,
+ 0x0490, 0x0491, 0x0492, 0x0493, 0x0494, 0x0495, 0x0496, 0x0497, 0x0498, 0x0499, 0x049a, 0x049b, 0x049c, 0x049d, 0x049e, 0x251f,
+ 0x04a0, 0x04a1, 0x04a2, 0x04a3, 0x04a4, 0x04a5, 0x04a6, 0x04a7, 0x04a8, 0x04a9, 0x04aa, 0x04ab, 0x04ac, 0x04ad, 0x04ae, 0x04af,
+ 0x04b0, 0x04b1, 0x04b2, 0x04b3, 0x04b4, 0x04b5, 0x04b6, 0x04b7, 0x04b8, 0x04b9, 0x04ba, 0x04bb, 0x04bc, 0x04bd, 0x253e, 0x255f,
+ 0x08c0, 0x08c1, 0x08c2, 0x08c3, 0x08c4, 0x08c5, 0x08c6, 0x08c7, 0x08c8, 0x08c9, 0x08ca, 0x08cb, 0x08cc, 0x08cd, 0x08ce, 0x08cf,
+ 0x08d0, 0x08d1, 0x08d2, 0x08d3, 0x08d4, 0x08d5, 0x08d6, 0x08d7, 0x08d8, 0x08d9, 0x08da, 0x08db, 0x08dc, 0x08dd, 0x08de, 0x299f,
+ 0x0ce0, 0x0ce1, 0x0ce2, 0x0ce3, 0x0ce4, 0x0ce5, 0x0ce6, 0x0ce7, 0x0ce8, 0x0ce9, 0x0cea, 0x0ceb, 0x0cec, 0x0ced, 0x0cee, 0x0cef,
+ 0x10f0, 0x10f1, 0x10f2, 0x10f3, 0x10f4, 0x10f5, 0x10f6, 0x10f7, 0x20f8, 0x20f9, 0x20fa, 0x20fb, 0x257c, 0x257d, 0x29be, 0x2ddf,
+
+/* previous 1s = 1: */
+ 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x200f,
+ 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x202f,
+ 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x204f,
+ 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x203e, 0x206f,
+ 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x208f,
+ 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x20af,
+ 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x20cf,
+ 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, 0x0078, 0x0079, 0x007a, 0x007b, 0x207c, 0x207d, 0x20be, 0x20ef,
+ 0x0480, 0x0481, 0x0482, 0x0483, 0x0484, 0x0485, 0x0486, 0x0487, 0x0488, 0x0489, 0x048a, 0x048b, 0x048c, 0x048d, 0x048e, 0x250f,
+ 0x0490, 0x0491, 0x0492, 0x0493, 0x0494, 0x0495, 0x0496, 0x0497, 0x0498, 0x0499, 0x049a, 0x049b, 0x049c, 0x049d, 0x049e, 0x252f,
+ 0x04a0, 0x04a1, 0x04a2, 0x04a3, 0x04a4, 0x04a5, 0x04a6, 0x04a7, 0x04a8, 0x04a9, 0x04aa, 0x04ab, 0x04ac, 0x04ad, 0x04ae, 0x254f,
+ 0x04b0, 0x04b1, 0x04b2, 0x04b3, 0x04b4, 0x04b5, 0x04b6, 0x04b7, 0x04b8, 0x04b9, 0x04ba, 0x04bb, 0x04bc, 0x04bd, 0x253e, 0x256f,
+ 0x08c0, 0x08c1, 0x08c2, 0x08c3, 0x08c4, 0x08c5, 0x08c6, 0x08c7, 0x08c8, 0x08c9, 0x08ca, 0x08cb, 0x08cc, 0x08cd, 0x08ce, 0x298f,
+ 0x08d0, 0x08d1, 0x08d2, 0x08d3, 0x08d4, 0x08d5, 0x08d6, 0x08d7, 0x08d8, 0x08d9, 0x08da, 0x08db, 0x08dc, 0x08dd, 0x08de, 0x29af,
+ 0x0ce0, 0x0ce1, 0x0ce2, 0x0ce3, 0x0ce4, 0x0ce5, 0x0ce6, 0x0ce7, 0x0ce8, 0x0ce9, 0x0cea, 0x0ceb, 0x0cec, 0x0ced, 0x0cee, 0x2dcf,
+ 0x10f0, 0x10f1, 0x10f2, 0x10f3, 0x10f4, 0x10f5, 0x10f6, 0x10f7, 0x20f8, 0x20f9, 0x20fa, 0x20fb, 0x257c, 0x257d, 0x29be, 0x31ef,
+
+/* previous 1s = 2: */
+ 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x2007, 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x2017,
+ 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x2027, 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x2037,
+ 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x2047, 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x2057,
+ 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x2067, 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x203e, 0x2077,
+ 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x2087, 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x2097,
+ 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x20a7, 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x20b7,
+ 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x20c7, 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x20d7,
+ 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x20e7, 0x0078, 0x0079, 0x007a, 0x007b, 0x207c, 0x207d, 0x20be, 0x20f7,
+ 0x0480, 0x0481, 0x0482, 0x0483, 0x0484, 0x0485, 0x0486, 0x2507, 0x0488, 0x0489, 0x048a, 0x048b, 0x048c, 0x048d, 0x048e, 0x2517,
+ 0x0490, 0x0491, 0x0492, 0x0493, 0x0494, 0x0495, 0x0496, 0x2527, 0x0498, 0x0499, 0x049a, 0x049b, 0x049c, 0x049d, 0x049e, 0x2537,
+ 0x04a0, 0x04a1, 0x04a2, 0x04a3, 0x04a4, 0x04a5, 0x04a6, 0x2547, 0x04a8, 0x04a9, 0x04aa, 0x04ab, 0x04ac, 0x04ad, 0x04ae, 0x2557,
+ 0x04b0, 0x04b1, 0x04b2, 0x04b3, 0x04b4, 0x04b5, 0x04b6, 0x2567, 0x04b8, 0x04b9, 0x04ba, 0x04bb, 0x04bc, 0x04bd, 0x253e, 0x2577,
+ 0x08c0, 0x08c1, 0x08c2, 0x08c3, 0x08c4, 0x08c5, 0x08c6, 0x2987, 0x08c8, 0x08c9, 0x08ca, 0x08cb, 0x08cc, 0x08cd, 0x08ce, 0x2997,
+ 0x08d0, 0x08d1, 0x08d2, 0x08d3, 0x08d4, 0x08d5, 0x08d6, 0x29a7, 0x08d8, 0x08d9, 0x08da, 0x08db, 0x08dc, 0x08dd, 0x08de, 0x29b7,
+ 0x0ce0, 0x0ce1, 0x0ce2, 0x0ce3, 0x0ce4, 0x0ce5, 0x0ce6, 0x2dc7, 0x0ce8, 0x0ce9, 0x0cea, 0x0ceb, 0x0cec, 0x0ced, 0x0cee, 0x2dd7,
+ 0x10f0, 0x10f1, 0x10f2, 0x10f3, 0x10f4, 0x10f5, 0x10f6, 0x31e7, 0x20f8, 0x20f9, 0x20fa, 0x20fb, 0x257c, 0x257d, 0x29be, 0x41f7,
+
+/* previous 1s = 3: */
+ 0x0000, 0x0001, 0x0002, 0x2003, 0x0004, 0x0005, 0x0006, 0x200b, 0x0008, 0x0009, 0x000a, 0x2013, 0x000c, 0x000d, 0x000e, 0x201b,
+ 0x0010, 0x0011, 0x0012, 0x2023, 0x0014, 0x0015, 0x0016, 0x202b, 0x0018, 0x0019, 0x001a, 0x2033, 0x001c, 0x001d, 0x001e, 0x203b,
+ 0x0020, 0x0021, 0x0022, 0x2043, 0x0024, 0x0025, 0x0026, 0x204b, 0x0028, 0x0029, 0x002a, 0x2053, 0x002c, 0x002d, 0x002e, 0x205b,
+ 0x0030, 0x0031, 0x0032, 0x2063, 0x0034, 0x0035, 0x0036, 0x206b, 0x0038, 0x0039, 0x003a, 0x2073, 0x003c, 0x003d, 0x203e, 0x207b,
+ 0x0040, 0x0041, 0x0042, 0x2083, 0x0044, 0x0045, 0x0046, 0x208b, 0x0048, 0x0049, 0x004a, 0x2093, 0x004c, 0x004d, 0x004e, 0x209b,
+ 0x0050, 0x0051, 0x0052, 0x20a3, 0x0054, 0x0055, 0x0056, 0x20ab, 0x0058, 0x0059, 0x005a, 0x20b3, 0x005c, 0x005d, 0x005e, 0x20bb,
+ 0x0060, 0x0061, 0x0062, 0x20c3, 0x0064, 0x0065, 0x0066, 0x20cb, 0x0068, 0x0069, 0x006a, 0x20d3, 0x006c, 0x006d, 0x006e, 0x20db,
+ 0x0070, 0x0071, 0x0072, 0x20e3, 0x0074, 0x0075, 0x0076, 0x20eb, 0x0078, 0x0079, 0x007a, 0x20f3, 0x207c, 0x207d, 0x20be, 0x40fb,
+ 0x0480, 0x0481, 0x0482, 0x2503, 0x0484, 0x0485, 0x0486, 0x250b, 0x0488, 0x0489, 0x048a, 0x2513, 0x048c, 0x048d, 0x048e, 0x251b,
+ 0x0490, 0x0491, 0x0492, 0x2523, 0x0494, 0x0495, 0x0496, 0x252b, 0x0498, 0x0499, 0x049a, 0x2533, 0x049c, 0x049d, 0x049e, 0x253b,
+ 0x04a0, 0x04a1, 0x04a2, 0x2543, 0x04a4, 0x04a5, 0x04a6, 0x254b, 0x04a8, 0x04a9, 0x04aa, 0x2553, 0x04ac, 0x04ad, 0x04ae, 0x255b,
+ 0x04b0, 0x04b1, 0x04b2, 0x2563, 0x04b4, 0x04b5, 0x04b6, 0x256b, 0x04b8, 0x04b9, 0x04ba, 0x2573, 0x04bc, 0x04bd, 0x253e, 0x257b,
+ 0x08c0, 0x08c1, 0x08c2, 0x2983, 0x08c4, 0x08c5, 0x08c6, 0x298b, 0x08c8, 0x08c9, 0x08ca, 0x2993, 0x08cc, 0x08cd, 0x08ce, 0x299b,
+ 0x08d0, 0x08d1, 0x08d2, 0x29a3, 0x08d4, 0x08d5, 0x08d6, 0x29ab, 0x08d8, 0x08d9, 0x08da, 0x29b3, 0x08dc, 0x08dd, 0x08de, 0x29bb,
+ 0x0ce0, 0x0ce1, 0x0ce2, 0x2dc3, 0x0ce4, 0x0ce5, 0x0ce6, 0x2dcb, 0x0ce8, 0x0ce9, 0x0cea, 0x2dd3, 0x0cec, 0x0ced, 0x0cee, 0x2ddb,
+ 0x10f0, 0x10f1, 0x10f2, 0x31e3, 0x10f4, 0x10f5, 0x10f6, 0x31eb, 0x20f8, 0x20f9, 0x20fa, 0x41f3, 0x257c, 0x257d, 0x29be, 0x46fb,
+
+/* previous 1s = 4: */
+ 0x0000, 0x2001, 0x0002, 0x2005, 0x0004, 0x2009, 0x0006, 0x200d, 0x0008, 0x2011, 0x000a, 0x2015, 0x000c, 0x2019, 0x000e, 0x201d,
+ 0x0010, 0x2021, 0x0012, 0x2025, 0x0014, 0x2029, 0x0016, 0x202d, 0x0018, 0x2031, 0x001a, 0x2035, 0x001c, 0x2039, 0x001e, 0x203d,
+ 0x0020, 0x2041, 0x0022, 0x2045, 0x0024, 0x2049, 0x0026, 0x204d, 0x0028, 0x2051, 0x002a, 0x2055, 0x002c, 0x2059, 0x002e, 0x205d,
+ 0x0030, 0x2061, 0x0032, 0x2065, 0x0034, 0x2069, 0x0036, 0x206d, 0x0038, 0x2071, 0x003a, 0x2075, 0x003c, 0x2079, 0x203e, 0x407d,
+ 0x0040, 0x2081, 0x0042, 0x2085, 0x0044, 0x2089, 0x0046, 0x208d, 0x0048, 0x2091, 0x004a, 0x2095, 0x004c, 0x2099, 0x004e, 0x209d,
+ 0x0050, 0x20a1, 0x0052, 0x20a5, 0x0054, 0x20a9, 0x0056, 0x20ad, 0x0058, 0x20b1, 0x005a, 0x20b5, 0x005c, 0x20b9, 0x005e, 0x20bd,
+ 0x0060, 0x20c1, 0x0062, 0x20c5, 0x0064, 0x20c9, 0x0066, 0x20cd, 0x0068, 0x20d1, 0x006a, 0x20d5, 0x006c, 0x20d9, 0x006e, 0x20dd,
+ 0x0070, 0x20e1, 0x0072, 0x20e5, 0x0074, 0x20e9, 0x0076, 0x20ed, 0x0078, 0x20f1, 0x007a, 0x20f5, 0x207c, 0x40f9, 0x20be, 0x417d,
+ 0x0480, 0x2501, 0x0482, 0x2505, 0x0484, 0x2509, 0x0486, 0x250d, 0x0488, 0x2511, 0x048a, 0x2515, 0x048c, 0x2519, 0x048e, 0x251d,
+ 0x0490, 0x2521, 0x0492, 0x2525, 0x0494, 0x2529, 0x0496, 0x252d, 0x0498, 0x2531, 0x049a, 0x2535, 0x049c, 0x2539, 0x049e, 0x253d,
+ 0x04a0, 0x2541, 0x04a2, 0x2545, 0x04a4, 0x2549, 0x04a6, 0x254d, 0x04a8, 0x2551, 0x04aa, 0x2555, 0x04ac, 0x2559, 0x04ae, 0x255d,
+ 0x04b0, 0x2561, 0x04b2, 0x2565, 0x04b4, 0x2569, 0x04b6, 0x256d, 0x04b8, 0x2571, 0x04ba, 0x2575, 0x04bc, 0x2579, 0x253e, 0x467d,
+ 0x08c0, 0x2981, 0x08c2, 0x2985, 0x08c4, 0x2989, 0x08c6, 0x298d, 0x08c8, 0x2991, 0x08ca, 0x2995, 0x08cc, 0x2999, 0x08ce, 0x299d,
+ 0x08d0, 0x29a1, 0x08d2, 0x29a5, 0x08d4, 0x29a9, 0x08d6, 0x29ad, 0x08d8, 0x29b1, 0x08da, 0x29b5, 0x08dc, 0x29b9, 0x08de, 0x29bd,
+ 0x0ce0, 0x2dc1, 0x0ce2, 0x2dc5, 0x0ce4, 0x2dc9, 0x0ce6, 0x2dcd, 0x0ce8, 0x2dd1, 0x0cea, 0x2dd5, 0x0cec, 0x2dd9, 0x0cee, 0x2ddd,
+ 0x10f0, 0x31e1, 0x10f2, 0x31e5, 0x10f4, 0x31e9, 0x10f6, 0x31ed, 0x20f8, 0x41f1, 0x20fa, 0x41f5, 0x257c, 0x46f9, 0x29be, 0x4b7d
+};
+
+/* hdlc_bitstuff_byte
+ * perform HDLC bitstuffing for one input byte (8 bits, LSB first)
+ * parameters:
+ * cin input byte
+ * ones number of trailing '1' bits in result before this step
+ * iwb pointer to output buffer structure
+ * (write semaphore must be held)
+ * return value:
+ * number of trailing '1' bits in result after this step
+ */
+
+static inline int hdlc_bitstuff_byte(struct isowbuf_t *iwb, unsigned char cin,
+ int ones)
+{
+ u16 stuff;
+ int shiftinc, newones;
+
+ /* get stuffing information for input byte
+ * value: bit 9.. 0 = result bits
+ * bit 12..10 = number of trailing '1' bits in result
+ * bit 14..13 = number of bits added by stuffing
+ */
+ stuff = stufftab[256 * ones + cin];
+ shiftinc = (stuff >> 13) & 3;
+ newones = (stuff >> 10) & 7;
+ stuff &= 0x3ff;
+
+ /* append stuffed byte to output stream */
+ isowbuf_putbits(iwb, stuff, 8 + shiftinc);
+ return newones;
+}
+
+/* hdlc_buildframe
+ * Perform HDLC framing with bitstuffing on a byte buffer
+ * The input buffer is regarded as a sequence of bits, starting with the least
+ * significant bit of the first byte and ending with the most significant bit
+ * of the last byte. A 16 bit FCS is appended as defined by RFC 1662.
+ * Whenever five consecutive '1' bits appear in the resulting bit sequence, a
+ * '0' bit is inserted after them.
+ * The resulting bit string and a closing flag pattern (PPP_FLAG, '01111110')
+ * are appended to the output buffer starting at the given bit position, which
+ * is assumed to already contain a leading flag.
+ * The output buffer must have sufficient length; count + count/5 + 6 bytes
+ * starting at *out are safe and are verified to be present.
+ * parameters:
+ * in input buffer
+ * count number of bytes in input buffer
+ * iwb pointer to output buffer structure
+ * (write semaphore must be held)
+ * return value:
+ * position of end of packet in output buffer on success,
+ * -EAGAIN if write semaphore busy or buffer full
+ */
+
+static inline int hdlc_buildframe(struct isowbuf_t *iwb,
+ unsigned char *in, int count)
+{
+ int ones;
+ u16 fcs;
+ int end;
+ unsigned char c;
+
+ if (isowbuf_freebytes(iwb) < count + count / 5 + 6 ||
+ isowbuf_startwrite(iwb) < 0) {
+ gig_dbg(DEBUG_ISO, "%s: %d bytes free -> -EAGAIN",
+ __func__, isowbuf_freebytes(iwb));
+ return -EAGAIN;
+ }
+
+ dump_bytes(DEBUG_STREAM_DUMP, "snd data", in, count);
+
+ /* bitstuff and checksum input data */
+ fcs = PPP_INITFCS;
+ ones = 0;
+ while (count-- > 0) {
+ c = *in++;
+ ones = hdlc_bitstuff_byte(iwb, c, ones);
+ fcs = crc_ccitt_byte(fcs, c);
+ }
+
+ /* bitstuff and append FCS
+ * (complemented, least significant byte first) */
+ fcs ^= 0xffff;
+ ones = hdlc_bitstuff_byte(iwb, fcs & 0x00ff, ones);
+ ones = hdlc_bitstuff_byte(iwb, (fcs >> 8) & 0x00ff, ones);
+
+ /* put closing flag and repeat byte for flag idle */
+ isowbuf_putflag(iwb);
+ end = isowbuf_donewrite(iwb);
+ return end;
+}
+
+/* trans_buildframe
+ * Append a block of 'transparent' data to the output buffer,
+ * inverting the bytes.
+ * The output buffer must have sufficient length; count bytes
+ * starting at *out are safe and are verified to be present.
+ * parameters:
+ * in input buffer
+ * count number of bytes in input buffer
+ * iwb pointer to output buffer structure
+ * (write semaphore must be held)
+ * return value:
+ * position of end of packet in output buffer on success,
+ * -EAGAIN if write semaphore busy or buffer full
+ */
+
+static inline int trans_buildframe(struct isowbuf_t *iwb,
+ unsigned char *in, int count)
+{
+ int write;
+ unsigned char c;
+
+ if (unlikely(count <= 0))
+ return iwb->write;
+
+ if (isowbuf_freebytes(iwb) < count ||
+ isowbuf_startwrite(iwb) < 0) {
+ gig_dbg(DEBUG_ISO, "can't put %d bytes", count);
+ return -EAGAIN;
+ }
+
+ gig_dbg(DEBUG_STREAM, "put %d bytes", count);
+ dump_bytes(DEBUG_STREAM_DUMP, "snd data", in, count);
+
+ write = iwb->write;
+ do {
+ c = bitrev8(*in++);
+ iwb->data[write++] = c;
+ write %= BAS_OUTBUFSIZE;
+ } while (--count > 0);
+ iwb->write = write;
+ iwb->idle = c;
+
+ return isowbuf_donewrite(iwb);
+}
+
+int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len)
+{
+ int result;
+
+ switch (bcs->proto2) {
+ case L2_HDLC:
+ result = hdlc_buildframe(bcs->hw.bas->isooutbuf, in, len);
+ gig_dbg(DEBUG_ISO, "%s: %d bytes HDLC -> %d",
+ __func__, len, result);
+ break;
+ default: /* assume transparent */
+ result = trans_buildframe(bcs->hw.bas->isooutbuf, in, len);
+ gig_dbg(DEBUG_ISO, "%s: %d bytes trans -> %d",
+ __func__, len, result);
+ }
+ return result;
+}
+
+/* hdlc_putbyte
+ * append byte c to current skb of B channel structure *bcs, updating fcs
+ */
+static inline void hdlc_putbyte(unsigned char c, struct bc_state *bcs)
+{
+ bcs->rx_fcs = crc_ccitt_byte(bcs->rx_fcs, c);
+ if (bcs->rx_skb == NULL)
+ /* skipping */
+ return;
+ if (bcs->rx_skb->len >= bcs->rx_bufsize) {
+ dev_warn(bcs->cs->dev, "received oversized packet discarded\n");
+ bcs->hw.bas->giants++;
+ dev_kfree_skb_any(bcs->rx_skb);
+ bcs->rx_skb = NULL;
+ return;
+ }
+ __skb_put_u8(bcs->rx_skb, c);
+}
+
+/* hdlc_flush
+ * drop partial HDLC data packet
+ */
+static inline void hdlc_flush(struct bc_state *bcs)
+{
+ /* clear skb or allocate new if not skipping */
+ if (bcs->rx_skb != NULL)
+ skb_trim(bcs->rx_skb, 0);
+ else
+ gigaset_new_rx_skb(bcs);
+
+ /* reset packet state */
+ bcs->rx_fcs = PPP_INITFCS;
+}
+
+/* hdlc_done
+ * process completed HDLC data packet
+ */
+static inline void hdlc_done(struct bc_state *bcs)
+{
+ struct cardstate *cs = bcs->cs;
+ struct sk_buff *procskb;
+ unsigned int len;
+
+ if (unlikely(bcs->ignore)) {
+ bcs->ignore--;
+ hdlc_flush(bcs);
+ return;
+ }
+ procskb = bcs->rx_skb;
+ if (procskb == NULL) {
+ /* previous error */
+ gig_dbg(DEBUG_ISO, "%s: skb=NULL", __func__);
+ gigaset_isdn_rcv_err(bcs);
+ } else if (procskb->len < 2) {
+ dev_notice(cs->dev, "received short frame (%d octets)\n",
+ procskb->len);
+ bcs->hw.bas->runts++;
+ dev_kfree_skb_any(procskb);
+ gigaset_isdn_rcv_err(bcs);
+ } else if (bcs->rx_fcs != PPP_GOODFCS) {
+ dev_notice(cs->dev, "frame check error\n");
+ bcs->hw.bas->fcserrs++;
+ dev_kfree_skb_any(procskb);
+ gigaset_isdn_rcv_err(bcs);
+ } else {
+ len = procskb->len;
+ __skb_trim(procskb, len -= 2); /* subtract FCS */
+ gig_dbg(DEBUG_ISO, "%s: good frame (%d octets)", __func__, len);
+ dump_bytes(DEBUG_STREAM_DUMP,
+ "rcv data", procskb->data, len);
+ bcs->hw.bas->goodbytes += len;
+ gigaset_skb_rcvd(bcs, procskb);
+ }
+ gigaset_new_rx_skb(bcs);
+ bcs->rx_fcs = PPP_INITFCS;
+}
+
+/* hdlc_frag
+ * drop HDLC data packet with non-integral last byte
+ */
+static inline void hdlc_frag(struct bc_state *bcs, unsigned inbits)
+{
+ if (unlikely(bcs->ignore)) {
+ bcs->ignore--;
+ hdlc_flush(bcs);
+ return;
+ }
+
+ dev_notice(bcs->cs->dev, "received partial byte (%d bits)\n", inbits);
+ bcs->hw.bas->alignerrs++;
+ gigaset_isdn_rcv_err(bcs);
+ __skb_trim(bcs->rx_skb, 0);
+ bcs->rx_fcs = PPP_INITFCS;
+}
+
+/* bit counts lookup table for HDLC bit unstuffing
+ * index: input byte
+ * value: bit 0..3 = number of consecutive '1' bits starting from LSB
+ * bit 4..6 = number of consecutive '1' bits starting from MSB
+ * (replacing 8 by 7 to make it fit; the algorithm won't care)
+ * bit 7 set if there are 5 or more "interior" consecutive '1' bits
+ */
+static const unsigned char bitcounts[256] = {
+ 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x03, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x04,
+ 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x03, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x05,
+ 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x03, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x04,
+ 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x03, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x80, 0x06,
+ 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x03, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x04,
+ 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x03, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x05,
+ 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x03, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x04,
+ 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, 0x03, 0x00, 0x01, 0x00, 0x02, 0x80, 0x81, 0x80, 0x07,
+ 0x10, 0x11, 0x10, 0x12, 0x10, 0x11, 0x10, 0x13, 0x10, 0x11, 0x10, 0x12, 0x10, 0x11, 0x10, 0x14,
+ 0x10, 0x11, 0x10, 0x12, 0x10, 0x11, 0x10, 0x13, 0x10, 0x11, 0x10, 0x12, 0x10, 0x11, 0x10, 0x15,
+ 0x10, 0x11, 0x10, 0x12, 0x10, 0x11, 0x10, 0x13, 0x10, 0x11, 0x10, 0x12, 0x10, 0x11, 0x10, 0x14,
+ 0x10, 0x11, 0x10, 0x12, 0x10, 0x11, 0x10, 0x13, 0x10, 0x11, 0x10, 0x12, 0x10, 0x11, 0x90, 0x16,
+ 0x20, 0x21, 0x20, 0x22, 0x20, 0x21, 0x20, 0x23, 0x20, 0x21, 0x20, 0x22, 0x20, 0x21, 0x20, 0x24,
+ 0x20, 0x21, 0x20, 0x22, 0x20, 0x21, 0x20, 0x23, 0x20, 0x21, 0x20, 0x22, 0x20, 0x21, 0x20, 0x25,
+ 0x30, 0x31, 0x30, 0x32, 0x30, 0x31, 0x30, 0x33, 0x30, 0x31, 0x30, 0x32, 0x30, 0x31, 0x30, 0x34,
+ 0x40, 0x41, 0x40, 0x42, 0x40, 0x41, 0x40, 0x43, 0x50, 0x51, 0x50, 0x52, 0x60, 0x61, 0x70, 0x78
+};
+
+/* hdlc_unpack
+ * perform HDLC frame processing (bit unstuffing, flag detection, FCS
+ * calculation) on a sequence of received data bytes (8 bits each, LSB first)
+ * pass on successfully received, complete frames as SKBs via gigaset_skb_rcvd
+ * notify of errors via gigaset_isdn_rcv_err
+ * tally frames, errors etc. in BC structure counters
+ * parameters:
+ * src received data
+ * count number of received bytes
+ * bcs receiving B channel structure
+ */
+static inline void hdlc_unpack(unsigned char *src, unsigned count,
+ struct bc_state *bcs)
+{
+ struct bas_bc_state *ubc = bcs->hw.bas;
+ int inputstate;
+ unsigned seqlen, inbyte, inbits;
+
+ /* load previous state:
+ * inputstate = set of flag bits:
+ * - INS_flag_hunt: no complete opening flag received since connection
+ * setup or last abort
+ * - INS_have_data: at least one complete data byte received since last
+ * flag
+ * seqlen = number of consecutive '1' bits in last 7 input stream bits
+ * (0..7)
+ * inbyte = accumulated partial data byte (if !INS_flag_hunt)
+ * inbits = number of valid bits in inbyte, starting at LSB (0..6)
+ */
+ inputstate = bcs->inputstate;
+ seqlen = ubc->seqlen;
+ inbyte = ubc->inbyte;
+ inbits = ubc->inbits;
+
+ /* bit unstuffing a byte a time
+ * Take your time to understand this; it's straightforward but tedious.
+ * The "bitcounts" lookup table is used to speed up the counting of
+ * leading and trailing '1' bits.
+ */
+ while (count--) {
+ unsigned char c = *src++;
+ unsigned char tabentry = bitcounts[c];
+ unsigned lead1 = tabentry & 0x0f;
+ unsigned trail1 = (tabentry >> 4) & 0x0f;
+
+ seqlen += lead1;
+
+ if (unlikely(inputstate & INS_flag_hunt)) {
+ if (c == PPP_FLAG) {
+ /* flag-in-one */
+ inputstate &= ~(INS_flag_hunt | INS_have_data);
+ inbyte = 0;
+ inbits = 0;
+ } else if (seqlen == 6 && trail1 != 7) {
+ /* flag completed & not followed by abort */
+ inputstate &= ~(INS_flag_hunt | INS_have_data);
+ inbyte = c >> (lead1 + 1);
+ inbits = 7 - lead1;
+ if (trail1 >= 8) {
+ /* interior stuffing:
+ * omitting the MSB handles most cases,
+ * correct the incorrectly handled
+ * cases individually */
+ inbits--;
+ switch (c) {
+ case 0xbe:
+ inbyte = 0x3f;
+ break;
+ }
+ }
+ }
+ /* else: continue flag-hunting */
+ } else if (likely(seqlen < 5 && trail1 < 7)) {
+ /* streamlined case: 8 data bits, no stuffing */
+ inbyte |= c << inbits;
+ hdlc_putbyte(inbyte & 0xff, bcs);
+ inputstate |= INS_have_data;
+ inbyte >>= 8;
+ /* inbits unchanged */
+ } else if (likely(seqlen == 6 && inbits == 7 - lead1 &&
+ trail1 + 1 == inbits &&
+ !(inputstate & INS_have_data))) {
+ /* streamlined case: flag idle - state unchanged */
+ } else if (unlikely(seqlen > 6)) {
+ /* abort sequence */
+ ubc->aborts++;
+ hdlc_flush(bcs);
+ inputstate |= INS_flag_hunt;
+ } else if (seqlen == 6) {
+ /* closing flag, including (6 - lead1) '1's
+ * and one '0' from inbits */
+ if (inbits > 7 - lead1) {
+ hdlc_frag(bcs, inbits + lead1 - 7);
+ inputstate &= ~INS_have_data;
+ } else {
+ if (inbits < 7 - lead1)
+ ubc->stolen0s++;
+ if (inputstate & INS_have_data) {
+ hdlc_done(bcs);
+ inputstate &= ~INS_have_data;
+ }
+ }
+
+ if (c == PPP_FLAG) {
+ /* complete flag, LSB overlaps preceding flag */
+ ubc->shared0s++;
+ inbits = 0;
+ inbyte = 0;
+ } else if (trail1 != 7) {
+ /* remaining bits */
+ inbyte = c >> (lead1 + 1);
+ inbits = 7 - lead1;
+ if (trail1 >= 8) {
+ /* interior stuffing:
+ * omitting the MSB handles most cases,
+ * correct the incorrectly handled
+ * cases individually */
+ inbits--;
+ switch (c) {
+ case 0xbe:
+ inbyte = 0x3f;
+ break;
+ }
+ }
+ } else {
+ /* abort sequence follows,
+ * skb already empty anyway */
+ ubc->aborts++;
+ inputstate |= INS_flag_hunt;
+ }
+ } else { /* (seqlen < 6) && (seqlen == 5 || trail1 >= 7) */
+
+ if (c == PPP_FLAG) {
+ /* complete flag */
+ if (seqlen == 5)
+ ubc->stolen0s++;
+ if (inbits) {
+ hdlc_frag(bcs, inbits);
+ inbits = 0;
+ inbyte = 0;
+ } else if (inputstate & INS_have_data)
+ hdlc_done(bcs);
+ inputstate &= ~INS_have_data;
+ } else if (trail1 == 7) {
+ /* abort sequence */
+ ubc->aborts++;
+ hdlc_flush(bcs);
+ inputstate |= INS_flag_hunt;
+ } else {
+ /* stuffed data */
+ if (trail1 < 7) { /* => seqlen == 5 */
+ /* stuff bit at position lead1,
+ * no interior stuffing */
+ unsigned char mask = (1 << lead1) - 1;
+ c = (c & mask) | ((c & ~mask) >> 1);
+ inbyte |= c << inbits;
+ inbits += 7;
+ } else if (seqlen < 5) { /* trail1 >= 8 */
+ /* interior stuffing:
+ * omitting the MSB handles most cases,
+ * correct the incorrectly handled
+ * cases individually */
+ switch (c) {
+ case 0xbe:
+ c = 0x7e;
+ break;
+ }
+ inbyte |= c << inbits;
+ inbits += 7;
+ } else { /* seqlen == 5 && trail1 >= 8 */
+
+ /* stuff bit at lead1 *and* interior
+ * stuffing -- unstuff individually */
+ switch (c) {
+ case 0x7d:
+ c = 0x3f;
+ break;
+ case 0xbe:
+ c = 0x3f;
+ break;
+ case 0x3e:
+ c = 0x1f;
+ break;
+ case 0x7c:
+ c = 0x3e;
+ break;
+ }
+ inbyte |= c << inbits;
+ inbits += 6;
+ }
+ if (inbits >= 8) {
+ inbits -= 8;
+ hdlc_putbyte(inbyte & 0xff, bcs);
+ inputstate |= INS_have_data;
+ inbyte >>= 8;
+ }
+ }
+ }
+ seqlen = trail1 & 7;
+ }
+
+ /* save new state */
+ bcs->inputstate = inputstate;
+ ubc->seqlen = seqlen;
+ ubc->inbyte = inbyte;
+ ubc->inbits = inbits;
+}
+
+/* trans_receive
+ * pass on received USB frame transparently as SKB via gigaset_skb_rcvd
+ * invert bytes
+ * tally frames, errors etc. in BC structure counters
+ * parameters:
+ * src received data
+ * count number of received bytes
+ * bcs receiving B channel structure
+ */
+static inline void trans_receive(unsigned char *src, unsigned count,
+ struct bc_state *bcs)
+{
+ struct sk_buff *skb;
+ int dobytes;
+ unsigned char *dst;
+
+ if (unlikely(bcs->ignore)) {
+ bcs->ignore--;
+ return;
+ }
+ skb = bcs->rx_skb;
+ if (skb == NULL) {
+ skb = gigaset_new_rx_skb(bcs);
+ if (skb == NULL)
+ return;
+ }
+ dobytes = bcs->rx_bufsize - skb->len;
+ while (count > 0) {
+ dst = skb_put(skb, count < dobytes ? count : dobytes);
+ while (count > 0 && dobytes > 0) {
+ *dst++ = bitrev8(*src++);
+ count--;
+ dobytes--;
+ }
+ if (dobytes == 0) {
+ dump_bytes(DEBUG_STREAM_DUMP,
+ "rcv data", skb->data, skb->len);
+ bcs->hw.bas->goodbytes += skb->len;
+ gigaset_skb_rcvd(bcs, skb);
+ skb = gigaset_new_rx_skb(bcs);
+ if (skb == NULL)
+ return;
+ dobytes = bcs->rx_bufsize;
+ }
+ }
+}
+
+void gigaset_isoc_receive(unsigned char *src, unsigned count,
+ struct bc_state *bcs)
+{
+ switch (bcs->proto2) {
+ case L2_HDLC:
+ hdlc_unpack(src, count, bcs);
+ break;
+ default: /* assume transparent */
+ trans_receive(src, count, bcs);
+ }
+}
+
+/* == data input =========================================================== */
+
+/* process a block of received bytes in command mode (mstate != MS_LOCKED)
+ * Append received bytes to the command response buffer and forward them
+ * line by line to the response handler.
+ * Note: Received lines may be terminated by CR, LF, or CR LF, which will be
+ * removed before passing the line to the response handler.
+ */
+static void cmd_loop(unsigned char *src, int numbytes, struct inbuf_t *inbuf)
+{
+ struct cardstate *cs = inbuf->cs;
+ unsigned cbytes = cs->cbytes;
+ unsigned char c;
+
+ while (numbytes--) {
+ c = *src++;
+ switch (c) {
+ case '\n':
+ if (cbytes == 0 && cs->respdata[0] == '\r') {
+ /* collapse LF with preceding CR */
+ cs->respdata[0] = 0;
+ break;
+ }
+ /* fall through */
+ case '\r':
+ /* end of message line, pass to response handler */
+ if (cbytes >= MAX_RESP_SIZE) {
+ dev_warn(cs->dev, "response too large (%d)\n",
+ cbytes);
+ cbytes = MAX_RESP_SIZE;
+ }
+ cs->cbytes = cbytes;
+ gigaset_dbg_buffer(DEBUG_TRANSCMD, "received response",
+ cbytes, cs->respdata);
+ gigaset_handle_modem_response(cs);
+ cbytes = 0;
+
+ /* store EOL byte for CRLF collapsing */
+ cs->respdata[0] = c;
+ break;
+ default:
+ /* append to line buffer if possible */
+ if (cbytes < MAX_RESP_SIZE)
+ cs->respdata[cbytes] = c;
+ cbytes++;
+ }
+ }
+
+ /* save state */
+ cs->cbytes = cbytes;
+}
+
+
+/* process a block of data received through the control channel
+ */
+void gigaset_isoc_input(struct inbuf_t *inbuf)
+{
+ struct cardstate *cs = inbuf->cs;
+ unsigned tail, head, numbytes;
+ unsigned char *src;
+
+ head = inbuf->head;
+ while (head != (tail = inbuf->tail)) {
+ gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail);
+ if (head > tail)
+ tail = RBUFSIZE;
+ src = inbuf->data + head;
+ numbytes = tail - head;
+ gig_dbg(DEBUG_INTR, "processing %u bytes", numbytes);
+
+ if (cs->mstate == MS_LOCKED) {
+ gigaset_dbg_buffer(DEBUG_LOCKCMD, "received response",
+ numbytes, src);
+ gigaset_if_receive(inbuf->cs, src, numbytes);
+ } else {
+ cmd_loop(src, numbytes, inbuf);
+ }
+
+ head += numbytes;
+ if (head == RBUFSIZE)
+ head = 0;
+ gig_dbg(DEBUG_INTR, "setting head to %u", head);
+ inbuf->head = head;
+ }
+}
+
+
+/* == data output ========================================================== */
+
+/**
+ * gigaset_isoc_send_skb() - queue an skb for sending
+ * @bcs: B channel descriptor structure.
+ * @skb: data to send.
+ *
+ * Called by LL to queue an skb for sending, and start transmission if
+ * necessary.
+ * Once the payload data has been transmitted completely, gigaset_skb_sent()
+ * will be called with the skb's link layer header preserved.
+ *
+ * Return value:
+ * number of bytes accepted for sending (skb->len) if ok,
+ * error code < 0 (eg. -ENODEV) on error
+ */
+int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb)
+{
+ int len = skb->len;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bcs->cs->lock, flags);
+ if (!bcs->cs->connected) {
+ spin_unlock_irqrestore(&bcs->cs->lock, flags);
+ return -ENODEV;
+ }
+
+ skb_queue_tail(&bcs->squeue, skb);
+ gig_dbg(DEBUG_ISO, "%s: skb queued, qlen=%d",
+ __func__, skb_queue_len(&bcs->squeue));
+
+ /* tasklet submits URB if necessary */
+ tasklet_schedule(&bcs->hw.bas->sent_tasklet);
+ spin_unlock_irqrestore(&bcs->cs->lock, flags);
+
+ return len; /* ok so far */
+}
--- /dev/null
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
++// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Stuff used by all variants of the driver
+ *
+ * Copyright (c) 2001 by Stefan Eilers,
+ * Hansjoerg Lipp <hjlipp@web.de>,
+ * Tilman Schmidt <tilman@imap.cc>.
+ *
+ * =====================================================================
+ * =====================================================================
+ */
+
+#include "gigaset.h"
+
+static ssize_t show_cidmode(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct cardstate *cs = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", cs->cidmode);
+}
+
+static ssize_t set_cidmode(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct cardstate *cs = dev_get_drvdata(dev);
+ long int value;
+ char *end;
+
+ value = simple_strtol(buf, &end, 0);
+ while (*end)
+ if (!isspace(*end++))
+ return -EINVAL;
+ if (value < 0 || value > 1)
+ return -EINVAL;
+
+ if (mutex_lock_interruptible(&cs->mutex))
+ return -ERESTARTSYS;
+
+ cs->waiting = 1;
+ if (!gigaset_add_event(cs, &cs->at_state, EV_PROC_CIDMODE,
+ NULL, value, NULL)) {
+ cs->waiting = 0;
+ mutex_unlock(&cs->mutex);
+ return -ENOMEM;
+ }
+ gigaset_schedule_event(cs);
+
+ wait_event(cs->waitqueue, !cs->waiting);
+
+ mutex_unlock(&cs->mutex);
+
+ return count;
+}
+
+static DEVICE_ATTR(cidmode, S_IRUGO | S_IWUSR, show_cidmode, set_cidmode);
+
+/* free sysfs for device */
+void gigaset_free_dev_sysfs(struct cardstate *cs)
+{
+ if (!cs->tty_dev)
+ return;
+
+ gig_dbg(DEBUG_INIT, "removing sysfs entries");
+ device_remove_file(cs->tty_dev, &dev_attr_cidmode);
+}
+
+/* initialize sysfs for device */
+void gigaset_init_dev_sysfs(struct cardstate *cs)
+{
+ if (!cs->tty_dev)
+ return;
+
+ gig_dbg(DEBUG_INIT, "setting up sysfs");
+ if (device_create_file(cs->tty_dev, &dev_attr_cidmode))
+ pr_err("could not create sysfs attribute\n");
+}
--- /dev/null
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
++// SPDX-License-Identifier: GPL-2.0-or-later
+/* This is the serial hardware link layer (HLL) for the Gigaset 307x isdn
+ * DECT base (aka Sinus 45 isdn) using the RS232 DECT data module M101,
+ * written as a line discipline.
+ *
+ * =====================================================================
+ * =====================================================================
+ */
+
+#include "gigaset.h"
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/completion.h>
+
+/* Version Information */
+#define DRIVER_AUTHOR "Tilman Schmidt"
+#define DRIVER_DESC "Serial Driver for Gigaset 307x using Siemens M101"
+
+#define GIGASET_MINORS 1
+#define GIGASET_MINOR 0
+#define GIGASET_MODULENAME "ser_gigaset"
+#define GIGASET_DEVNAME "ttyGS"
+
+/* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
+#define IF_WRITEBUF 264
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_LDISC(N_GIGASET_M101);
+
+static int startmode = SM_ISDN;
+module_param(startmode, int, S_IRUGO);
+MODULE_PARM_DESC(startmode, "initial operation mode");
+static int cidmode = 1;
+module_param(cidmode, int, S_IRUGO);
+MODULE_PARM_DESC(cidmode, "stay in CID mode when idle");
+
+static struct gigaset_driver *driver;
+
+struct ser_cardstate {
+ struct platform_device dev;
+ struct tty_struct *tty;
+ atomic_t refcnt;
+ struct completion dead_cmp;
+};
+
+static struct platform_driver device_driver = {
+ .driver = {
+ .name = GIGASET_MODULENAME,
+ },
+};
+
+static void flush_send_queue(struct cardstate *);
+
+/* transmit data from current open skb
+ * result: number of bytes sent or error code < 0
+ */
+static int write_modem(struct cardstate *cs)
+{
+ struct tty_struct *tty = cs->hw.ser->tty;
+ struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
+ struct sk_buff *skb = bcs->tx_skb;
+ int sent = -EOPNOTSUPP;
+
+ WARN_ON(!tty || !tty->ops || !skb);
+
+ if (!skb->len) {
+ dev_kfree_skb_any(skb);
+ bcs->tx_skb = NULL;
+ return -EINVAL;
+ }
+
+ set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
+ if (tty->ops->write)
+ sent = tty->ops->write(tty, skb->data, skb->len);
+ gig_dbg(DEBUG_OUTPUT, "write_modem: sent %d", sent);
+ if (sent < 0) {
+ /* error */
+ flush_send_queue(cs);
+ return sent;
+ }
+ skb_pull(skb, sent);
+ if (!skb->len) {
+ /* skb sent completely */
+ gigaset_skb_sent(bcs, skb);
+
+ gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
+ (unsigned long) skb);
+ dev_kfree_skb_any(skb);
+ bcs->tx_skb = NULL;
+ }
+ return sent;
+}
+
+/*
+ * transmit first queued command buffer
+ * result: number of bytes sent or error code < 0
+ */
+static int send_cb(struct cardstate *cs)
+{
+ struct tty_struct *tty = cs->hw.ser->tty;
+ struct cmdbuf_t *cb, *tcb;
+ unsigned long flags;
+ int sent = 0;
+
+ WARN_ON(!tty || !tty->ops);
+
+ cb = cs->cmdbuf;
+ if (!cb)
+ return 0; /* nothing to do */
+
+ if (cb->len) {
+ set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
+ sent = tty->ops->write(tty, cb->buf + cb->offset, cb->len);
+ if (sent < 0) {
+ /* error */
+ gig_dbg(DEBUG_OUTPUT, "send_cb: write error %d", sent);
+ flush_send_queue(cs);
+ return sent;
+ }
+ cb->offset += sent;
+ cb->len -= sent;
+ gig_dbg(DEBUG_OUTPUT, "send_cb: sent %d, left %u, queued %u",
+ sent, cb->len, cs->cmdbytes);
+ }
+
+ while (cb && !cb->len) {
+ spin_lock_irqsave(&cs->cmdlock, flags);
+ cs->cmdbytes -= cs->curlen;
+ tcb = cb;
+ cs->cmdbuf = cb = cb->next;
+ if (cb) {
+ cb->prev = NULL;
+ cs->curlen = cb->len;
+ } else {
+ cs->lastcmdbuf = NULL;
+ cs->curlen = 0;
+ }
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+
+ if (tcb->wake_tasklet)
+ tasklet_schedule(tcb->wake_tasklet);
+ kfree(tcb);
+ }
+ return sent;
+}
+
+/*
+ * send queue tasklet
+ * If there is already a skb opened, put data to the transfer buffer
+ * by calling "write_modem".
+ * Otherwise take a new skb out of the queue.
+ */
+static void gigaset_modem_fill(unsigned long data)
+{
+ struct cardstate *cs = (struct cardstate *) data;
+ struct bc_state *bcs;
+ struct sk_buff *nextskb;
+ int sent = 0;
+
+ if (!cs) {
+ gig_dbg(DEBUG_OUTPUT, "%s: no cardstate", __func__);
+ return;
+ }
+ bcs = cs->bcs;
+ if (!bcs) {
+ gig_dbg(DEBUG_OUTPUT, "%s: no cardstate", __func__);
+ return;
+ }
+ if (!bcs->tx_skb) {
+ /* no skb is being sent; send command if any */
+ sent = send_cb(cs);
+ gig_dbg(DEBUG_OUTPUT, "%s: send_cb -> %d", __func__, sent);
+ if (sent)
+ /* something sent or error */
+ return;
+
+ /* no command to send; get skb */
+ nextskb = skb_dequeue(&bcs->squeue);
+ if (!nextskb)
+ /* no skb either, nothing to do */
+ return;
+ bcs->tx_skb = nextskb;
+
+ gig_dbg(DEBUG_INTR, "Dequeued skb (Adr: %lx)",
+ (unsigned long) bcs->tx_skb);
+ }
+
+ /* send skb */
+ gig_dbg(DEBUG_OUTPUT, "%s: tx_skb", __func__);
+ if (write_modem(cs) < 0)
+ gig_dbg(DEBUG_OUTPUT, "%s: write_modem failed", __func__);
+}
+
+/*
+ * throw away all data queued for sending
+ */
+static void flush_send_queue(struct cardstate *cs)
+{
+ struct sk_buff *skb;
+ struct cmdbuf_t *cb;
+ unsigned long flags;
+
+ /* command queue */
+ spin_lock_irqsave(&cs->cmdlock, flags);
+ while ((cb = cs->cmdbuf) != NULL) {
+ cs->cmdbuf = cb->next;
+ if (cb->wake_tasklet)
+ tasklet_schedule(cb->wake_tasklet);
+ kfree(cb);
+ }
+ cs->cmdbuf = cs->lastcmdbuf = NULL;
+ cs->cmdbytes = cs->curlen = 0;
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+
+ /* data queue */
+ if (cs->bcs->tx_skb)
+ dev_kfree_skb_any(cs->bcs->tx_skb);
+ while ((skb = skb_dequeue(&cs->bcs->squeue)) != NULL)
+ dev_kfree_skb_any(skb);
+}
+
+
+/* Gigaset Driver Interface */
+/* ======================== */
+
+/*
+ * queue an AT command string for transmission to the Gigaset device
+ * parameters:
+ * cs controller state structure
+ * buf buffer containing the string to send
+ * len number of characters to send
+ * wake_tasklet tasklet to run when transmission is complete, or NULL
+ * return value:
+ * number of bytes queued, or error code < 0
+ */
+static int gigaset_write_cmd(struct cardstate *cs, struct cmdbuf_t *cb)
+{
+ unsigned long flags;
+
+ gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
+ DEBUG_TRANSCMD : DEBUG_LOCKCMD,
+ "CMD Transmit", cb->len, cb->buf);
+
+ spin_lock_irqsave(&cs->cmdlock, flags);
+ cb->prev = cs->lastcmdbuf;
+ if (cs->lastcmdbuf)
+ cs->lastcmdbuf->next = cb;
+ else {
+ cs->cmdbuf = cb;
+ cs->curlen = cb->len;
+ }
+ cs->cmdbytes += cb->len;
+ cs->lastcmdbuf = cb;
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+
+ spin_lock_irqsave(&cs->lock, flags);
+ if (cs->connected)
+ tasklet_schedule(&cs->write_tasklet);
+ spin_unlock_irqrestore(&cs->lock, flags);
+ return cb->len;
+}
+
+/*
+ * tty_driver.write_room interface routine
+ * return number of characters the driver will accept to be written
+ * parameter:
+ * controller state structure
+ * return value:
+ * number of characters
+ */
+static int gigaset_write_room(struct cardstate *cs)
+{
+ unsigned bytes;
+
+ bytes = cs->cmdbytes;
+ return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
+}
+
+/*
+ * tty_driver.chars_in_buffer interface routine
+ * return number of characters waiting to be sent
+ * parameter:
+ * controller state structure
+ * return value:
+ * number of characters
+ */
+static int gigaset_chars_in_buffer(struct cardstate *cs)
+{
+ return cs->cmdbytes;
+}
+
+/*
+ * implementation of ioctl(GIGASET_BRKCHARS)
+ * parameter:
+ * controller state structure
+ * return value:
+ * -EINVAL (unimplemented function)
+ */
+static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
+{
+ /* not implemented */
+ return -EINVAL;
+}
+
+/*
+ * Open B channel
+ * Called by "do_action" in ev-layer.c
+ */
+static int gigaset_init_bchannel(struct bc_state *bcs)
+{
+ /* nothing to do for M10x */
+ gigaset_bchannel_up(bcs);
+ return 0;
+}
+
+/*
+ * Close B channel
+ * Called by "do_action" in ev-layer.c
+ */
+static int gigaset_close_bchannel(struct bc_state *bcs)
+{
+ /* nothing to do for M10x */
+ gigaset_bchannel_down(bcs);
+ return 0;
+}
+
+/*
+ * Set up B channel structure
+ * This is called by "gigaset_initcs" in common.c
+ */
+static int gigaset_initbcshw(struct bc_state *bcs)
+{
+ /* unused */
+ bcs->hw.ser = NULL;
+ return 0;
+}
+
+/*
+ * Free B channel structure
+ * Called by "gigaset_freebcs" in common.c
+ */
+static void gigaset_freebcshw(struct bc_state *bcs)
+{
+ /* unused */
+}
+
+/*
+ * Reinitialize B channel structure
+ * This is called by "bcs_reinit" in common.c
+ */
+static void gigaset_reinitbcshw(struct bc_state *bcs)
+{
+ /* nothing to do for M10x */
+}
+
+/*
+ * Free hardware specific device data
+ * This will be called by "gigaset_freecs" in common.c
+ */
+static void gigaset_freecshw(struct cardstate *cs)
+{
+ tasklet_kill(&cs->write_tasklet);
+ if (!cs->hw.ser)
+ return;
+ platform_device_unregister(&cs->hw.ser->dev);
+}
+
+static void gigaset_device_release(struct device *dev)
+{
+ kfree(container_of(dev, struct ser_cardstate, dev.dev));
+}
+
+/*
+ * Set up hardware specific device data
+ * This is called by "gigaset_initcs" in common.c
+ */
+static int gigaset_initcshw(struct cardstate *cs)
+{
+ int rc;
+ struct ser_cardstate *scs;
+
+ scs = kzalloc(sizeof(struct ser_cardstate), GFP_KERNEL);
+ if (!scs) {
+ pr_err("out of memory\n");
+ return -ENOMEM;
+ }
+ cs->hw.ser = scs;
+
+ cs->hw.ser->dev.name = GIGASET_MODULENAME;
+ cs->hw.ser->dev.id = cs->minor_index;
+ cs->hw.ser->dev.dev.release = gigaset_device_release;
+ rc = platform_device_register(&cs->hw.ser->dev);
+ if (rc != 0) {
+ pr_err("error %d registering platform device\n", rc);
+ kfree(cs->hw.ser);
+ cs->hw.ser = NULL;
+ return rc;
+ }
+
+ tasklet_init(&cs->write_tasklet,
+ gigaset_modem_fill, (unsigned long) cs);
+ return 0;
+}
+
+/*
+ * set modem control lines
+ * Parameters:
+ * card state structure
+ * modem control line state ([TIOCM_DTR]|[TIOCM_RTS])
+ * Called by "gigaset_start" and "gigaset_enterconfigmode" in common.c
+ * and by "if_lock" and "if_termios" in interface.c
+ */
+static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
+ unsigned new_state)
+{
+ struct tty_struct *tty = cs->hw.ser->tty;
+ unsigned int set, clear;
+
+ WARN_ON(!tty || !tty->ops);
+ /* tiocmset is an optional tty driver method */
+ if (!tty->ops->tiocmset)
+ return -EINVAL;
+ set = new_state & ~old_state;
+ clear = old_state & ~new_state;
+ if (!set && !clear)
+ return 0;
+ gig_dbg(DEBUG_IF, "tiocmset set %x clear %x", set, clear);
+ return tty->ops->tiocmset(tty, set, clear);
+}
+
+static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
+{
+ return -EINVAL;
+}
+
+static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
+{
+ return -EINVAL;
+}
+
+static const struct gigaset_ops ops = {
+ .write_cmd = gigaset_write_cmd,
+ .write_room = gigaset_write_room,
+ .chars_in_buffer = gigaset_chars_in_buffer,
+ .brkchars = gigaset_brkchars,
+ .init_bchannel = gigaset_init_bchannel,
+ .close_bchannel = gigaset_close_bchannel,
+ .initbcshw = gigaset_initbcshw,
+ .freebcshw = gigaset_freebcshw,
+ .reinitbcshw = gigaset_reinitbcshw,
+ .initcshw = gigaset_initcshw,
+ .freecshw = gigaset_freecshw,
+ .set_modem_ctrl = gigaset_set_modem_ctrl,
+ .baud_rate = gigaset_baud_rate,
+ .set_line_ctrl = gigaset_set_line_ctrl,
+ .send_skb = gigaset_m10x_send_skb, /* asyncdata.c */
+ .handle_input = gigaset_m10x_input, /* asyncdata.c */
+};
+
+
+/* Line Discipline Interface */
+/* ========================= */
+
+/* helper functions for cardstate refcounting */
+static struct cardstate *cs_get(struct tty_struct *tty)
+{
+ struct cardstate *cs = tty->disc_data;
+
+ if (!cs || !cs->hw.ser) {
+ gig_dbg(DEBUG_ANY, "%s: no cardstate", __func__);
+ return NULL;
+ }
+ atomic_inc(&cs->hw.ser->refcnt);
+ return cs;
+}
+
+static void cs_put(struct cardstate *cs)
+{
+ if (atomic_dec_and_test(&cs->hw.ser->refcnt))
+ complete(&cs->hw.ser->dead_cmp);
+}
+
+/*
+ * Called by the tty driver when the line discipline is pushed onto the tty.
+ * Called in process context.
+ */
+static int
+gigaset_tty_open(struct tty_struct *tty)
+{
+ struct cardstate *cs;
+ int rc;
+
+ gig_dbg(DEBUG_INIT, "Starting HLL for Gigaset M101");
+
+ pr_info(DRIVER_DESC "\n");
+
+ if (!driver) {
+ pr_err("%s: no driver structure\n", __func__);
+ return -ENODEV;
+ }
+
+ /* allocate memory for our device state and initialize it */
+ cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
+ if (!cs) {
+ rc = -ENODEV;
+ goto error;
+ }
+
+ cs->dev = &cs->hw.ser->dev.dev;
+ cs->hw.ser->tty = tty;
+ atomic_set(&cs->hw.ser->refcnt, 1);
+ init_completion(&cs->hw.ser->dead_cmp);
+ tty->disc_data = cs;
+
+ /* Set the amount of data we're willing to receive per call
+ * from the hardware driver to half of the input buffer size
+ * to leave some reserve.
+ * Note: We don't do flow control towards the hardware driver.
+ * If more data is received than will fit into the input buffer,
+ * it will be dropped and an error will be logged. This should
+ * never happen as the device is slow and the buffer size ample.
+ */
+ tty->receive_room = RBUFSIZE/2;
+
+ /* OK.. Initialization of the datastructures and the HW is done.. Now
+ * startup system and notify the LL that we are ready to run
+ */
+ if (startmode == SM_LOCKED)
+ cs->mstate = MS_LOCKED;
+ rc = gigaset_start(cs);
+ if (rc < 0) {
+ tasklet_kill(&cs->write_tasklet);
+ goto error;
+ }
+
+ gig_dbg(DEBUG_INIT, "Startup of HLL done");
+ return 0;
+
+error:
+ gig_dbg(DEBUG_INIT, "Startup of HLL failed");
+ tty->disc_data = NULL;
+ gigaset_freecs(cs);
+ return rc;
+}
+
+/*
+ * Called by the tty driver when the line discipline is removed.
+ * Called from process context.
+ */
+static void
+gigaset_tty_close(struct tty_struct *tty)
+{
+ struct cardstate *cs = tty->disc_data;
+
+ gig_dbg(DEBUG_INIT, "Stopping HLL for Gigaset M101");
+
+ if (!cs) {
+ gig_dbg(DEBUG_INIT, "%s: no cardstate", __func__);
+ return;
+ }
+
+ /* prevent other callers from entering ldisc methods */
+ tty->disc_data = NULL;
+
+ if (!cs->hw.ser)
+ pr_err("%s: no hw cardstate\n", __func__);
+ else {
+ /* wait for running methods to finish */
+ if (!atomic_dec_and_test(&cs->hw.ser->refcnt))
+ wait_for_completion(&cs->hw.ser->dead_cmp);
+ }
+
+ /* stop operations */
+ gigaset_stop(cs);
+ tasklet_kill(&cs->write_tasklet);
+ flush_send_queue(cs);
+ cs->dev = NULL;
+ gigaset_freecs(cs);
+
+ gig_dbg(DEBUG_INIT, "Shutdown of HLL done");
+}
+
+/*
+ * Called by the tty driver when the tty line is hung up.
+ * Wait for I/O to driver to complete and unregister ISDN device.
+ * This is already done by the close routine, so just call that.
+ * Called from process context.
+ */
+static int gigaset_tty_hangup(struct tty_struct *tty)
+{
+ gigaset_tty_close(tty);
+ return 0;
+}
+
+/*
+ * Ioctl on the tty.
+ * Called in process context only.
+ * May be re-entered by multiple ioctl calling threads.
+ */
+static int
+gigaset_tty_ioctl(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct cardstate *cs = cs_get(tty);
+ int rc, val;
+ int __user *p = (int __user *)arg;
+
+ if (!cs)
+ return -ENXIO;
+
+ switch (cmd) {
+
+ case FIONREAD:
+ /* unused, always return zero */
+ val = 0;
+ rc = put_user(val, p);
+ break;
+
+ case TCFLSH:
+ /* flush our buffers and the serial port's buffer */
+ switch (arg) {
+ case TCIFLUSH:
+ /* no own input buffer to flush */
+ break;
+ case TCIOFLUSH:
+ case TCOFLUSH:
+ flush_send_queue(cs);
+ break;
+ }
+ /* fall through */
+
+ default:
+ /* pass through to underlying serial device */
+ rc = n_tty_ioctl_helper(tty, file, cmd, arg);
+ break;
+ }
+ cs_put(cs);
+ return rc;
+}
+
+/*
+ * Called by the tty driver when a block of data has been received.
+ * Will not be re-entered while running but other ldisc functions
+ * may be called in parallel.
+ * Can be called from hard interrupt level as well as soft interrupt
+ * level or mainline.
+ * Parameters:
+ * tty tty structure
+ * buf buffer containing received characters
+ * cflags buffer containing error flags for received characters (ignored)
+ * count number of received characters
+ */
+static void
+gigaset_tty_receive(struct tty_struct *tty, const unsigned char *buf,
+ char *cflags, int count)
+{
+ struct cardstate *cs = cs_get(tty);
+ unsigned tail, head, n;
+ struct inbuf_t *inbuf;
+
+ if (!cs)
+ return;
+ inbuf = cs->inbuf;
+ if (!inbuf) {
+ dev_err(cs->dev, "%s: no inbuf\n", __func__);
+ cs_put(cs);
+ return;
+ }
+
+ tail = inbuf->tail;
+ head = inbuf->head;
+ gig_dbg(DEBUG_INTR, "buffer state: %u -> %u, receive %u bytes",
+ head, tail, count);
+
+ if (head <= tail) {
+ /* possible buffer wraparound */
+ n = min_t(unsigned, count, RBUFSIZE - tail);
+ memcpy(inbuf->data + tail, buf, n);
+ tail = (tail + n) % RBUFSIZE;
+ buf += n;
+ count -= n;
+ }
+
+ if (count > 0) {
+ /* tail < head and some data left */
+ n = head - tail - 1;
+ if (count > n) {
+ dev_err(cs->dev,
+ "inbuf overflow, discarding %d bytes\n",
+ count - n);
+ count = n;
+ }
+ memcpy(inbuf->data + tail, buf, count);
+ tail += count;
+ }
+
+ gig_dbg(DEBUG_INTR, "setting tail to %u", tail);
+ inbuf->tail = tail;
+
+ /* Everything was received .. Push data into handler */
+ gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
+ gigaset_schedule_event(cs);
+ cs_put(cs);
+}
+
+/*
+ * Called by the tty driver when there's room for more data to send.
+ */
+static void
+gigaset_tty_wakeup(struct tty_struct *tty)
+{
+ struct cardstate *cs = cs_get(tty);
+
+ clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
+ if (!cs)
+ return;
+ tasklet_schedule(&cs->write_tasklet);
+ cs_put(cs);
+}
+
+static struct tty_ldisc_ops gigaset_ldisc = {
+ .owner = THIS_MODULE,
+ .magic = TTY_LDISC_MAGIC,
+ .name = "ser_gigaset",
+ .open = gigaset_tty_open,
+ .close = gigaset_tty_close,
+ .hangup = gigaset_tty_hangup,
+ .ioctl = gigaset_tty_ioctl,
+ .receive_buf = gigaset_tty_receive,
+ .write_wakeup = gigaset_tty_wakeup,
+};
+
+
+/* Initialization / Shutdown */
+/* ========================= */
+
+static int __init ser_gigaset_init(void)
+{
+ int rc;
+
+ gig_dbg(DEBUG_INIT, "%s", __func__);
+ rc = platform_driver_register(&device_driver);
+ if (rc != 0) {
+ pr_err("error %d registering platform driver\n", rc);
+ return rc;
+ }
+
+ /* allocate memory for our driver state and initialize it */
+ driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
+ GIGASET_MODULENAME, GIGASET_DEVNAME,
+ &ops, THIS_MODULE);
+ if (!driver) {
+ rc = -ENOMEM;
+ goto error;
+ }
+
+ rc = tty_register_ldisc(N_GIGASET_M101, &gigaset_ldisc);
+ if (rc != 0) {
+ pr_err("error %d registering line discipline\n", rc);
+ goto error;
+ }
+
+ return 0;
+
+error:
+ if (driver) {
+ gigaset_freedriver(driver);
+ driver = NULL;
+ }
+ platform_driver_unregister(&device_driver);
+ return rc;
+}
+
+static void __exit ser_gigaset_exit(void)
+{
+ int rc;
+
+ gig_dbg(DEBUG_INIT, "%s", __func__);
+
+ if (driver) {
+ gigaset_freedriver(driver);
+ driver = NULL;
+ }
+
+ rc = tty_unregister_ldisc(N_GIGASET_M101);
+ if (rc != 0)
+ pr_err("error %d unregistering line discipline\n", rc);
+
+ platform_driver_unregister(&device_driver);
+}
+
+module_init(ser_gigaset_init);
+module_exit(ser_gigaset_exit);
--- /dev/null
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
++// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * USB driver for Gigaset 307x directly or using M105 Data.
+ *
+ * Copyright (c) 2001 by Stefan Eilers
+ * and Hansjoerg Lipp <hjlipp@web.de>.
+ *
+ * This driver was derived from the USB skeleton driver by
+ * Greg Kroah-Hartman <greg@kroah.com>
+ *
+ * =====================================================================
+ * =====================================================================
+ */
+
+#include "gigaset.h"
+#include <linux/usb.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+
+/* Version Information */
+#define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
+#define DRIVER_DESC "USB Driver for Gigaset 307x using M105"
+
+/* Module parameters */
+
+static int startmode = SM_ISDN;
+static int cidmode = 1;
+
+module_param(startmode, int, S_IRUGO);
+module_param(cidmode, int, S_IRUGO);
+MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
+MODULE_PARM_DESC(cidmode, "Call-ID mode");
+
+#define GIGASET_MINORS 1
+#define GIGASET_MINOR 8
+#define GIGASET_MODULENAME "usb_gigaset"
+#define GIGASET_DEVNAME "ttyGU"
+
+/* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
+#define IF_WRITEBUF 264
+
+/* Values for the Gigaset M105 Data */
+#define USB_M105_VENDOR_ID 0x0681
+#define USB_M105_PRODUCT_ID 0x0009
+
+/* table of devices that work with this driver */
+static const struct usb_device_id gigaset_table[] = {
+ { USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, gigaset_table);
+
+/*
+ * Control requests (empty fields: 00)
+ *
+ * RT|RQ|VALUE|INDEX|LEN |DATA
+ * In:
+ * C1 08 01
+ * Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
+ * C1 0F ll ll
+ * Get device information/status (llll: 0x200 and 0x40 seen).
+ * Real size: I only saw MIN(llll,0x64).
+ * Contents: seems to be always the same...
+ * offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
+ * offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
+ * rest: ?
+ * Out:
+ * 41 11
+ * Initialize/reset device ?
+ * 41 00 xx 00
+ * ? (xx=00 or 01; 01 on start, 00 on close)
+ * 41 07 vv mm
+ * Set/clear flags vv=value, mm=mask (see RQ 08)
+ * 41 12 xx
+ * Used before the following configuration requests are issued
+ * (with xx=0x0f). I've seen other values<0xf, though.
+ * 41 01 xx xx
+ * Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
+ * 41 03 ps bb
+ * Set byte size and parity. p: 0x20=even,0x10=odd,0x00=no parity
+ * [ 0x30: m, 0x40: s ]
+ * [s: 0: 1 stop bit; 1: 1.5; 2: 2]
+ * bb: bits/byte (seen 7 and 8)
+ * 41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
+ * ??
+ * Initialization: 01, 40, 00, 00
+ * Open device: 00 40, 00, 00
+ * yy and zz seem to be equal, either 0x00 or 0x0a
+ * (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
+ * 41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
+ * Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
+ * xx is usually 0x00 but was 0x7e before starting data transfer
+ * in unimodem mode. So, this might be an array of characters that
+ * need special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
+ *
+ * Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
+ * flags per packet.
+ */
+
+/* functions called if a device of this driver is connected/disconnected */
+static int gigaset_probe(struct usb_interface *interface,
+ const struct usb_device_id *id);
+static void gigaset_disconnect(struct usb_interface *interface);
+
+/* functions called before/after suspend */
+static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
+static int gigaset_resume(struct usb_interface *intf);
+static int gigaset_pre_reset(struct usb_interface *intf);
+
+static struct gigaset_driver *driver;
+
+/* usb specific object needed to register this driver with the usb subsystem */
+static struct usb_driver gigaset_usb_driver = {
+ .name = GIGASET_MODULENAME,
+ .probe = gigaset_probe,
+ .disconnect = gigaset_disconnect,
+ .id_table = gigaset_table,
+ .suspend = gigaset_suspend,
+ .resume = gigaset_resume,
+ .reset_resume = gigaset_resume,
+ .pre_reset = gigaset_pre_reset,
+ .post_reset = gigaset_resume,
+ .disable_hub_initiated_lpm = 1,
+};
+
+struct usb_cardstate {
+ struct usb_device *udev; /* usb device pointer */
+ struct usb_interface *interface; /* interface for this device */
+ int busy; /* bulk output in progress */
+
+ /* Output buffer */
+ unsigned char *bulk_out_buffer;
+ int bulk_out_size;
+ int bulk_out_epnum;
+ struct urb *bulk_out_urb;
+
+ /* Input buffer */
+ unsigned char *rcvbuf;
+ int rcvbuf_size;
+ struct urb *read_urb;
+
+ char bchars[6]; /* for request 0x19 */
+};
+
+static inline unsigned tiocm_to_gigaset(unsigned state)
+{
+ return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
+}
+
+static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
+ unsigned new_state)
+{
+ struct usb_device *udev = cs->hw.usb->udev;
+ unsigned mask, val;
+ int r;
+
+ mask = tiocm_to_gigaset(old_state ^ new_state);
+ val = tiocm_to_gigaset(new_state);
+
+ gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
+ r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
+ (val & 0xff) | ((mask & 0xff) << 8), 0,
+ NULL, 0, 2000 /* timeout? */);
+ if (r < 0)
+ return r;
+ return 0;
+}
+
+/*
+ * Set M105 configuration value
+ * using undocumented device commands reverse engineered from USB traces
+ * of the Siemens Windows driver
+ */
+static int set_value(struct cardstate *cs, u8 req, u16 val)
+{
+ struct usb_device *udev = cs->hw.usb->udev;
+ int r, r2;
+
+ gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
+ (unsigned)req, (unsigned)val);
+ r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
+ 0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
+ /* no idea what this does */
+ if (r < 0) {
+ dev_err(&udev->dev, "error %d on request 0x12\n", -r);
+ return r;
+ }
+
+ r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
+ val, 0, NULL, 0, 2000 /*?*/);
+ if (r < 0)
+ dev_err(&udev->dev, "error %d on request 0x%02x\n",
+ -r, (unsigned)req);
+
+ r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
+ 0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
+ if (r2 < 0)
+ dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
+
+ return r < 0 ? r : (r2 < 0 ? r2 : 0);
+}
+
+/*
+ * set the baud rate on the internal serial adapter
+ * using the undocumented parameter setting command
+ */
+static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
+{
+ u16 val;
+ u32 rate;
+
+ cflag &= CBAUD;
+
+ switch (cflag) {
+ case B300: rate = 300; break;
+ case B600: rate = 600; break;
+ case B1200: rate = 1200; break;
+ case B2400: rate = 2400; break;
+ case B4800: rate = 4800; break;
+ case B9600: rate = 9600; break;
+ case B19200: rate = 19200; break;
+ case B38400: rate = 38400; break;
+ case B57600: rate = 57600; break;
+ case B115200: rate = 115200; break;
+ default:
+ rate = 9600;
+ dev_err(cs->dev, "unsupported baudrate request 0x%x,"
+ " using default of B9600\n", cflag);
+ }
+
+ val = 0x383fff / rate + 1;
+
+ return set_value(cs, 1, val);
+}
+
+/*
+ * set the line format on the internal serial adapter
+ * using the undocumented parameter setting command
+ */
+static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
+{
+ u16 val = 0;
+
+ /* set the parity */
+ if (cflag & PARENB)
+ val |= (cflag & PARODD) ? 0x10 : 0x20;
+
+ /* set the number of data bits */
+ switch (cflag & CSIZE) {
+ case CS5:
+ val |= 5 << 8; break;
+ case CS6:
+ val |= 6 << 8; break;
+ case CS7:
+ val |= 7 << 8; break;
+ case CS8:
+ val |= 8 << 8; break;
+ default:
+ dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
+ val |= 8 << 8;
+ break;
+ }
+
+ /* set the number of stop bits */
+ if (cflag & CSTOPB) {
+ if ((cflag & CSIZE) == CS5)
+ val |= 1; /* 1.5 stop bits */
+ else
+ val |= 2; /* 2 stop bits */
+ }
+
+ return set_value(cs, 3, val);
+}
+
+
+/*============================================================================*/
+static int gigaset_init_bchannel(struct bc_state *bcs)
+{
+ /* nothing to do for M10x */
+ gigaset_bchannel_up(bcs);
+ return 0;
+}
+
+static int gigaset_close_bchannel(struct bc_state *bcs)
+{
+ /* nothing to do for M10x */
+ gigaset_bchannel_down(bcs);
+ return 0;
+}
+
+static int write_modem(struct cardstate *cs);
+static int send_cb(struct cardstate *cs);
+
+
+/* Write tasklet handler: Continue sending current skb, or send command, or
+ * start sending an skb from the send queue.
+ */
+static void gigaset_modem_fill(unsigned long data)
+{
+ struct cardstate *cs = (struct cardstate *) data;
+ struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
+
+ gig_dbg(DEBUG_OUTPUT, "modem_fill");
+
+ if (cs->hw.usb->busy) {
+ gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
+ return;
+ }
+
+again:
+ if (!bcs->tx_skb) { /* no skb is being sent */
+ if (cs->cmdbuf) { /* commands to send? */
+ gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
+ if (send_cb(cs) < 0) {
+ gig_dbg(DEBUG_OUTPUT,
+ "modem_fill: send_cb failed");
+ goto again; /* no callback will be called! */
+ }
+ return;
+ }
+
+ /* skbs to send? */
+ bcs->tx_skb = skb_dequeue(&bcs->squeue);
+ if (!bcs->tx_skb)
+ return;
+
+ gig_dbg(DEBUG_INTR, "Dequeued skb (Adr: %lx)!",
+ (unsigned long) bcs->tx_skb);
+ }
+
+ gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
+ if (write_modem(cs) < 0) {
+ gig_dbg(DEBUG_OUTPUT, "modem_fill: write_modem failed");
+ goto again; /* no callback will be called! */
+ }
+}
+
+/*
+ * Interrupt Input URB completion routine
+ */
+static void gigaset_read_int_callback(struct urb *urb)
+{
+ struct cardstate *cs = urb->context;
+ struct inbuf_t *inbuf = cs->inbuf;
+ int status = urb->status;
+ int r;
+ unsigned numbytes;
+ unsigned char *src;
+ unsigned long flags;
+
+ if (!status) {
+ numbytes = urb->actual_length;
+
+ if (numbytes) {
+ src = cs->hw.usb->rcvbuf;
+ if (unlikely(*src))
+ dev_warn(cs->dev,
+ "%s: There was no leading 0, but 0x%02x!\n",
+ __func__, (unsigned) *src);
+ ++src; /* skip leading 0x00 */
+ --numbytes;
+ if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
+ gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
+ gigaset_schedule_event(inbuf->cs);
+ }
+ } else
+ gig_dbg(DEBUG_INTR, "Received zero block length");
+ } else {
+ /* The urb might have been killed. */
+ gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
+ __func__, status);
+ if (status == -ENOENT || status == -ESHUTDOWN)
+ /* killed or endpoint shutdown: don't resubmit */
+ return;
+ }
+
+ /* resubmit URB */
+ spin_lock_irqsave(&cs->lock, flags);
+ if (!cs->connected) {
+ spin_unlock_irqrestore(&cs->lock, flags);
+ pr_err("%s: disconnected\n", __func__);
+ return;
+ }
+ r = usb_submit_urb(urb, GFP_ATOMIC);
+ spin_unlock_irqrestore(&cs->lock, flags);
+ if (r)
+ dev_err(cs->dev, "error %d resubmitting URB\n", -r);
+}
+
+
+/* This callback routine is called when data was transmitted to the device. */
+static void gigaset_write_bulk_callback(struct urb *urb)
+{
+ struct cardstate *cs = urb->context;
+ int status = urb->status;
+ unsigned long flags;
+
+ switch (status) {
+ case 0: /* normal completion */
+ break;
+ case -ENOENT: /* killed */
+ gig_dbg(DEBUG_ANY, "%s: killed", __func__);
+ cs->hw.usb->busy = 0;
+ return;
+ default:
+ dev_err(cs->dev, "bulk transfer failed (status %d)\n",
+ -status);
+ /* That's all we can do. Communication problems
+ are handled by timeouts or network protocols. */
+ }
+
+ spin_lock_irqsave(&cs->lock, flags);
+ if (!cs->connected) {
+ pr_err("%s: disconnected\n", __func__);
+ } else {
+ cs->hw.usb->busy = 0;
+ tasklet_schedule(&cs->write_tasklet);
+ }
+ spin_unlock_irqrestore(&cs->lock, flags);
+}
+
+static int send_cb(struct cardstate *cs)
+{
+ struct cmdbuf_t *cb = cs->cmdbuf;
+ unsigned long flags;
+ int count;
+ int status = -ENOENT;
+ struct usb_cardstate *ucs = cs->hw.usb;
+
+ do {
+ if (!cb->len) {
+ spin_lock_irqsave(&cs->cmdlock, flags);
+ cs->cmdbytes -= cs->curlen;
+ gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
+ cs->curlen, cs->cmdbytes);
+ cs->cmdbuf = cb->next;
+ if (cs->cmdbuf) {
+ cs->cmdbuf->prev = NULL;
+ cs->curlen = cs->cmdbuf->len;
+ } else {
+ cs->lastcmdbuf = NULL;
+ cs->curlen = 0;
+ }
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+
+ if (cb->wake_tasklet)
+ tasklet_schedule(cb->wake_tasklet);
+ kfree(cb);
+
+ cb = cs->cmdbuf;
+ }
+
+ if (cb) {
+ count = min(cb->len, ucs->bulk_out_size);
+ gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
+
+ usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
+ usb_sndbulkpipe(ucs->udev,
+ ucs->bulk_out_epnum),
+ cb->buf + cb->offset, count,
+ gigaset_write_bulk_callback, cs);
+
+ cb->offset += count;
+ cb->len -= count;
+ ucs->busy = 1;
+
+ spin_lock_irqsave(&cs->lock, flags);
+ status = cs->connected ?
+ usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) :
+ -ENODEV;
+ spin_unlock_irqrestore(&cs->lock, flags);
+
+ if (status) {
+ ucs->busy = 0;
+ dev_err(cs->dev,
+ "could not submit urb (error %d)\n",
+ -status);
+ cb->len = 0; /* skip urb => remove cb+wakeup
+ in next loop cycle */
+ }
+ }
+ } while (cb && status); /* next command on error */
+
+ return status;
+}
+
+/* Send command to device. */
+static int gigaset_write_cmd(struct cardstate *cs, struct cmdbuf_t *cb)
+{
+ unsigned long flags;
+ int len;
+
+ gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
+ DEBUG_TRANSCMD : DEBUG_LOCKCMD,
+ "CMD Transmit", cb->len, cb->buf);
+
+ spin_lock_irqsave(&cs->cmdlock, flags);
+ cb->prev = cs->lastcmdbuf;
+ if (cs->lastcmdbuf)
+ cs->lastcmdbuf->next = cb;
+ else {
+ cs->cmdbuf = cb;
+ cs->curlen = cb->len;
+ }
+ cs->cmdbytes += cb->len;
+ cs->lastcmdbuf = cb;
+ spin_unlock_irqrestore(&cs->cmdlock, flags);
+
+ spin_lock_irqsave(&cs->lock, flags);
+ len = cb->len;
+ if (cs->connected)
+ tasklet_schedule(&cs->write_tasklet);
+ spin_unlock_irqrestore(&cs->lock, flags);
+ return len;
+}
+
+static int gigaset_write_room(struct cardstate *cs)
+{
+ unsigned bytes;
+
+ bytes = cs->cmdbytes;
+ return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
+}
+
+static int gigaset_chars_in_buffer(struct cardstate *cs)
+{
+ return cs->cmdbytes;
+}
+
+/*
+ * set the break characters on the internal serial adapter
+ * using undocumented device commands reverse engineered from USB traces
+ * of the Siemens Windows driver
+ */
+static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
+{
+ struct usb_device *udev = cs->hw.usb->udev;
+
+ gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
+ memcpy(cs->hw.usb->bchars, buf, 6);
+ return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
+ 0, 0, &buf, 6, 2000);
+}
+
+static void gigaset_freebcshw(struct bc_state *bcs)
+{
+ /* unused */
+}
+
+/* Initialize the b-channel structure */
+static int gigaset_initbcshw(struct bc_state *bcs)
+{
+ /* unused */
+ bcs->hw.usb = NULL;
+ return 0;
+}
+
+static void gigaset_reinitbcshw(struct bc_state *bcs)
+{
+ /* nothing to do for M10x */
+}
+
+static void gigaset_freecshw(struct cardstate *cs)
+{
+ tasklet_kill(&cs->write_tasklet);
+ kfree(cs->hw.usb);
+}
+
+static int gigaset_initcshw(struct cardstate *cs)
+{
+ struct usb_cardstate *ucs;
+
+ cs->hw.usb = ucs =
+ kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
+ if (!ucs) {
+ pr_err("out of memory\n");
+ return -ENOMEM;
+ }
+
+ ucs->bchars[0] = 0;
+ ucs->bchars[1] = 0;
+ ucs->bchars[2] = 0;
+ ucs->bchars[3] = 0;
+ ucs->bchars[4] = 0x11;
+ ucs->bchars[5] = 0x13;
+ ucs->bulk_out_buffer = NULL;
+ ucs->bulk_out_urb = NULL;
+ ucs->read_urb = NULL;
+ tasklet_init(&cs->write_tasklet,
+ gigaset_modem_fill, (unsigned long) cs);
+
+ return 0;
+}
+
+/* Send data from current skb to the device. */
+static int write_modem(struct cardstate *cs)
+{
+ int ret = 0;
+ int count;
+ struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
+ struct usb_cardstate *ucs = cs->hw.usb;
+ unsigned long flags;
+
+ gig_dbg(DEBUG_OUTPUT, "len: %d...", bcs->tx_skb->len);
+
+ if (!bcs->tx_skb->len) {
+ dev_kfree_skb_any(bcs->tx_skb);
+ bcs->tx_skb = NULL;
+ return -EINVAL;
+ }
+
+ /* Copy data to bulk out buffer and transmit data */
+ count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
+ skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
+ skb_pull(bcs->tx_skb, count);
+ ucs->busy = 1;
+ gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
+
+ spin_lock_irqsave(&cs->lock, flags);
+ if (cs->connected) {
+ usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
+ usb_sndbulkpipe(ucs->udev,
+ ucs->bulk_out_epnum),
+ ucs->bulk_out_buffer, count,
+ gigaset_write_bulk_callback, cs);
+ ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
+ } else {
+ ret = -ENODEV;
+ }
+ spin_unlock_irqrestore(&cs->lock, flags);
+
+ if (ret) {
+ dev_err(cs->dev, "could not submit urb (error %d)\n", -ret);
+ ucs->busy = 0;
+ }
+
+ if (!bcs->tx_skb->len) {
+ /* skb sent completely */
+ gigaset_skb_sent(bcs, bcs->tx_skb);
+
+ gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
+ (unsigned long) bcs->tx_skb);
+ dev_kfree_skb_any(bcs->tx_skb);
+ bcs->tx_skb = NULL;
+ }
+
+ return ret;
+}
+
+static int gigaset_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
+{
+ int retval;
+ struct usb_device *udev = interface_to_usbdev(interface);
+ struct usb_host_interface *hostif = interface->cur_altsetting;
+ struct cardstate *cs = NULL;
+ struct usb_cardstate *ucs = NULL;
+ struct usb_endpoint_descriptor *endpoint;
+ int buffer_size;
+
+ gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
+
+ /* See if the device offered us matches what we can accept */
+ if ((le16_to_cpu(udev->descriptor.idVendor) != USB_M105_VENDOR_ID) ||
+ (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
+ gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
+ le16_to_cpu(udev->descriptor.idVendor),
+ le16_to_cpu(udev->descriptor.idProduct));
+ return -ENODEV;
+ }
+ if (hostif->desc.bInterfaceNumber != 0) {
+ gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
+ hostif->desc.bInterfaceNumber);
+ return -ENODEV;
+ }
+ if (hostif->desc.bAlternateSetting != 0) {
+ dev_notice(&udev->dev, "unsupported altsetting %d - skip",
+ hostif->desc.bAlternateSetting);
+ return -ENODEV;
+ }
+ if (hostif->desc.bInterfaceClass != 255) {
+ dev_notice(&udev->dev, "unsupported interface class %d - skip",
+ hostif->desc.bInterfaceClass);
+ return -ENODEV;
+ }
+
+ dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
+
+ /* allocate memory for our device state and initialize it */
+ cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
+ if (!cs)
+ return -ENODEV;
+ ucs = cs->hw.usb;
+
+ /* save off device structure ptrs for later use */
+ usb_get_dev(udev);
+ ucs->udev = udev;
+ ucs->interface = interface;
+ cs->dev = &interface->dev;
+
+ /* save address of controller structure */
+ usb_set_intfdata(interface, cs);
+
+ endpoint = &hostif->endpoint[0].desc;
+
+ buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+ ucs->bulk_out_size = buffer_size;
+ ucs->bulk_out_epnum = usb_endpoint_num(endpoint);
+ ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
+ if (!ucs->bulk_out_buffer) {
+ dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
+ retval = -ENOMEM;
+ goto error;
+ }
+
+ ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!ucs->bulk_out_urb) {
+ dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
+ retval = -ENOMEM;
+ goto error;
+ }
+
+ endpoint = &hostif->endpoint[1].desc;
+
+ ucs->busy = 0;
+
+ ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!ucs->read_urb) {
+ dev_err(cs->dev, "No free urbs available\n");
+ retval = -ENOMEM;
+ goto error;
+ }
+ buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+ ucs->rcvbuf_size = buffer_size;
+ ucs->rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
+ if (!ucs->rcvbuf) {
+ dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
+ retval = -ENOMEM;
+ goto error;
+ }
+ /* Fill the interrupt urb and send it to the core */
+ usb_fill_int_urb(ucs->read_urb, udev,
+ usb_rcvintpipe(udev, usb_endpoint_num(endpoint)),
+ ucs->rcvbuf, buffer_size,
+ gigaset_read_int_callback,
+ cs, endpoint->bInterval);
+
+ retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
+ if (retval) {
+ dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
+ goto error;
+ }
+
+ /* tell common part that the device is ready */
+ if (startmode == SM_LOCKED)
+ cs->mstate = MS_LOCKED;
+
+ retval = gigaset_start(cs);
+ if (retval < 0) {
+ tasklet_kill(&cs->write_tasklet);
+ goto error;
+ }
+ return 0;
+
+error:
+ usb_kill_urb(ucs->read_urb);
+ kfree(ucs->bulk_out_buffer);
+ usb_free_urb(ucs->bulk_out_urb);
+ kfree(ucs->rcvbuf);
+ usb_free_urb(ucs->read_urb);
+ usb_set_intfdata(interface, NULL);
+ ucs->read_urb = ucs->bulk_out_urb = NULL;
+ ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
+ usb_put_dev(ucs->udev);
+ ucs->udev = NULL;
+ ucs->interface = NULL;
+ gigaset_freecs(cs);
+ return retval;
+}
+
+static void gigaset_disconnect(struct usb_interface *interface)
+{
+ struct cardstate *cs;
+ struct usb_cardstate *ucs;
+
+ cs = usb_get_intfdata(interface);
+ ucs = cs->hw.usb;
+
+ dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
+
+ usb_kill_urb(ucs->read_urb);
+
+ gigaset_stop(cs);
+
+ usb_set_intfdata(interface, NULL);
+ tasklet_kill(&cs->write_tasklet);
+
+ usb_kill_urb(ucs->bulk_out_urb);
+
+ kfree(ucs->bulk_out_buffer);
+ usb_free_urb(ucs->bulk_out_urb);
+ kfree(ucs->rcvbuf);
+ usb_free_urb(ucs->read_urb);
+ ucs->read_urb = ucs->bulk_out_urb = NULL;
+ ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
+
+ usb_put_dev(ucs->udev);
+ ucs->interface = NULL;
+ ucs->udev = NULL;
+ cs->dev = NULL;
+ gigaset_freecs(cs);
+}
+
+/* gigaset_suspend
+ * This function is called before the USB connection is suspended or reset.
+ */
+static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct cardstate *cs = usb_get_intfdata(intf);
+
+ /* stop activity */
+ cs->connected = 0; /* prevent rescheduling */
+ usb_kill_urb(cs->hw.usb->read_urb);
+ tasklet_kill(&cs->write_tasklet);
+ usb_kill_urb(cs->hw.usb->bulk_out_urb);
+
+ gig_dbg(DEBUG_SUSPEND, "suspend complete");
+ return 0;
+}
+
+/* gigaset_resume
+ * This function is called after the USB connection has been resumed or reset.
+ */
+static int gigaset_resume(struct usb_interface *intf)
+{
+ struct cardstate *cs = usb_get_intfdata(intf);
+ int rc;
+
+ /* resubmit interrupt URB */
+ cs->connected = 1;
+ rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
+ if (rc) {
+ dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
+ return rc;
+ }
+
+ gig_dbg(DEBUG_SUSPEND, "resume complete");
+ return 0;
+}
+
+/* gigaset_pre_reset
+ * This function is called before the USB connection is reset.
+ */
+static int gigaset_pre_reset(struct usb_interface *intf)
+{
+ /* same as suspend */
+ return gigaset_suspend(intf, PMSG_ON);
+}
+
+static const struct gigaset_ops ops = {
+ .write_cmd = gigaset_write_cmd,
+ .write_room = gigaset_write_room,
+ .chars_in_buffer = gigaset_chars_in_buffer,
+ .brkchars = gigaset_brkchars,
+ .init_bchannel = gigaset_init_bchannel,
+ .close_bchannel = gigaset_close_bchannel,
+ .initbcshw = gigaset_initbcshw,
+ .freebcshw = gigaset_freebcshw,
+ .reinitbcshw = gigaset_reinitbcshw,
+ .initcshw = gigaset_initcshw,
+ .freecshw = gigaset_freecshw,
+ .set_modem_ctrl = gigaset_set_modem_ctrl,
+ .baud_rate = gigaset_baud_rate,
+ .set_line_ctrl = gigaset_set_line_ctrl,
+ .send_skb = gigaset_m10x_send_skb,
+ .handle_input = gigaset_m10x_input,
+};
+
+/*
+ * This function is called while kernel-module is loaded
+ */
+static int __init usb_gigaset_init(void)
+{
+ int result;
+
+ /* allocate memory for our driver state and initialize it */
+ driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
+ GIGASET_MODULENAME, GIGASET_DEVNAME,
+ &ops, THIS_MODULE);
+ if (driver == NULL) {
+ result = -ENOMEM;
+ goto error;
+ }
+
+ /* register this driver with the USB subsystem */
+ result = usb_register(&gigaset_usb_driver);
+ if (result < 0) {
+ pr_err("error %d registering USB driver\n", -result);
+ goto error;
+ }
+
+ pr_info(DRIVER_DESC "\n");
+ return 0;
+
+error:
+ if (driver)
+ gigaset_freedriver(driver);
+ driver = NULL;
+ return result;
+}
+
+/*
+ * This function is called while unloading the kernel-module
+ */
+static void __exit usb_gigaset_exit(void)
+{
+ int i;
+
+ gigaset_blockdriver(driver); /* => probe will fail
+ * => no gigaset_start any more
+ */
+
+ /* stop all connected devices */
+ for (i = 0; i < driver->minors; i++)
+ gigaset_shutdown(driver->cs + i);
+
+ /* from now on, no isdn callback should be possible */
+
+ /* deregister this driver with the USB subsystem */
+ usb_deregister(&gigaset_usb_driver);
+ /* this will call the disconnect-callback */
+ /* from now on, no disconnect/probe callback should be running */
+
+ gigaset_freedriver(driver);
+ driver = NULL;
+}
+
+
+module_init(usb_gigaset_init);
+module_exit(usb_gigaset_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+
+MODULE_LICENSE("GPL");
};
#define TLS_OFFLOAD_CONTEXT_SIZE_TX \
- (ALIGN(sizeof(struct tls_offload_context_tx), sizeof(void *)) + \
- TLS_DRIVER_STATE_SIZE)
+ (sizeof(struct tls_offload_context_tx) + TLS_DRIVER_STATE_SIZE_TX)
+ enum tls_context_flags {
+ TLS_RX_SYNC_RUNNING = 0,
+ };
+
struct cipher_context {
char *iv;
char *rec_seq;
projects / openwrt / staging / blogic.git / commitdiff