drivers/isdn/gigaset/usb-gigaset.c

   1 /*
   2  * USB driver for Gigaset 307x directly or using M105 Data.
   3  *
   4  * Copyright (c) 2001 by Stefan Eilers
   5  *                   and Hansjoerg Lipp <hjlipp@web.de>.
   6  *
   7  * This driver was derived from the USB skeleton driver by
   8  * Greg Kroah-Hartman <greg@kroah.com>
   9  *
  10  * =====================================================================
  11  *      This program is free software; you can redistribute it and/or
  12  *      modify it under the terms of the GNU General Public License as
  13  *      published by the Free Software Foundation; either version 2 of
  14  *      the License, or (at your option) any later version.
  15  * =====================================================================
  16  */
  17
  18 #include "gigaset.h"
  19 #include <linux/usb.h>
  20 #include <linux/module.h>
  21 #include <linux/moduleparam.h>
  22
  23 /* Version Information */
  24 #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
  25 #define DRIVER_DESC "USB Driver for Gigaset 307x using M105"
  26
  27 /* Module parameters */
  28
  29 static int startmode = SM_ISDN;
  30 static int cidmode = 1;
  31
  32 module_param(startmode, int, S_IRUGO);
  33 module_param(cidmode, int, S_IRUGO);
  34 MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
  35 MODULE_PARM_DESC(cidmode, "Call-ID mode");
  36
  37 #define GIGASET_MINORS     1
  38 #define GIGASET_MINOR      8
  39 #define GIGASET_MODULENAME "usb_gigaset"
  40 #define GIGASET_DEVNAME    "ttyGU"
  41
  42 /* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
  43 #define IF_WRITEBUF 264
  44
  45 /* Values for the Gigaset M105 Data */
  46 #define USB_M105_VENDOR_ID      0x0681
  47 #define USB_M105_PRODUCT_ID     0x0009
  48
  49 /* table of devices that work with this driver */
  50 static const struct usb_device_id gigaset_table[] = {
  51         { USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
  52         { }                                     /* Terminating entry */
  53 };
  54
  55 MODULE_DEVICE_TABLE(usb, gigaset_table);
  56
  57 /*
  58  * Control requests (empty fields: 00)
  59  *
  60  *       RT|RQ|VALUE|INDEX|LEN  |DATA
  61  * In:
  62  *       C1 08             01
  63  *            Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
  64  *       C1 0F             ll ll
  65  *            Get device information/status (llll: 0x200 and 0x40 seen).
  66  *            Real size: I only saw MIN(llll,0x64).
  67  *            Contents: seems to be always the same...
  68  *              offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
  69  *              offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
  70  *              rest:        ?
  71  * Out:
  72  *       41 11
  73  *            Initialize/reset device ?
  74  *       41 00 xx 00
  75  *            ? (xx=00 or 01; 01 on start, 00 on close)
  76  *       41 07 vv mm
  77  *            Set/clear flags vv=value, mm=mask (see RQ 08)
  78  *       41 12 xx
  79  *            Used before the following configuration requests are issued
  80  *            (with xx=0x0f). I've seen other values<0xf, though.
  81  *       41 01 xx xx
  82  *            Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
  83  *       41 03 ps bb
  84  *            Set byte size and parity. p:  0x20=even,0x10=odd,0x00=no parity
  85  *                                     [    0x30: m, 0x40: s           ]
  86  *                                     [s:  0: 1 stop bit; 1: 1.5; 2: 2]
  87  *                                      bb: bits/byte (seen 7 and 8)
  88  *       41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
  89  *            ??
  90  *            Initialization: 01, 40, 00, 00
  91  *            Open device:    00  40, 00, 00
  92  *            yy and zz seem to be equal, either 0x00 or 0x0a
  93  *            (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
  94  *       41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
  95  *            Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
  96  *            xx is usually 0x00 but was 0x7e before starting data transfer
  97  *            in unimodem mode. So, this might be an array of characters that
  98  *            need special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
  99  *
 100  * Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
 101  * flags per packet.
 102  */
 103
 104 /* functions called if a device of this driver is connected/disconnected */
 105 static int gigaset_probe(struct usb_interface *interface,
 106                          const struct usb_device_id *id);
 107 static void gigaset_disconnect(struct usb_interface *interface);
 108
 109 /* functions called before/after suspend */
 110 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
 111 static int gigaset_resume(struct usb_interface *intf);
 112 static int gigaset_pre_reset(struct usb_interface *intf);
 113
 114 static struct gigaset_driver *driver;
 115
 116 /* usb specific object needed to register this driver with the usb subsystem */
 117 static struct usb_driver gigaset_usb_driver = {
 118         .name =         GIGASET_MODULENAME,
 119         .probe =        gigaset_probe,
 120         .disconnect =   gigaset_disconnect,
 121         .id_table =     gigaset_table,
 122         .suspend =      gigaset_suspend,
 123         .resume =       gigaset_resume,
 124         .reset_resume = gigaset_resume,
 125         .pre_reset =    gigaset_pre_reset,
 126         .post_reset =   gigaset_resume,
 127         .disable_hub_initiated_lpm = 1,
 128 };
 129
 130 struct usb_cardstate {
 131         struct usb_device       *udev;          /* usb device pointer */
 132         struct usb_interface    *interface;     /* interface for this device */
 133         int                     busy;           /* bulk output in progress */
 134
 135         /* Output buffer */
 136         unsigned char           *bulk_out_buffer;
 137         int                     bulk_out_size;
 138         __u8                    bulk_out_endpointAddr;
 139         struct urb              *bulk_out_urb;
 140
 141         /* Input buffer */
 142         unsigned char           *rcvbuf;
 143         int                     rcvbuf_size;
 144         struct urb              *read_urb;
 145         __u8                    int_in_endpointAddr;
 146
 147         char                    bchars[6];              /* for request 0x19 */
 148 };
 149
 150 static inline unsigned tiocm_to_gigaset(unsigned state)
 151 {
 152         return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
 153 }
 154
 155 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
 156                                   unsigned new_state)
 157 {
 158         struct usb_device *udev = cs->hw.usb->udev;
 159         unsigned mask, val;
 160         int r;
 161
 162         mask = tiocm_to_gigaset(old_state ^ new_state);
 163         val = tiocm_to_gigaset(new_state);
 164
 165         gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
 166         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
 167                             (val & 0xff) | ((mask & 0xff) << 8), 0,
 168                             NULL, 0, 2000 /* timeout? */);
 169         if (r < 0)
 170                 return r;
 171         return 0;
 172 }
 173
 174 /*
 175  * Set M105 configuration value
 176  * using undocumented device commands reverse engineered from USB traces
 177  * of the Siemens Windows driver
 178  */
 179 static int set_value(struct cardstate *cs, u8 req, u16 val)
 180 {
 181         struct usb_device *udev = cs->hw.usb->udev;
 182         int r, r2;
 183
 184         gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
 185                 (unsigned)req, (unsigned)val);
 186         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
 187                             0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
 188         /* no idea what this does */
 189         if (r < 0) {
 190                 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
 191                 return r;
 192         }
 193
 194         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
 195                             val, 0, NULL, 0, 2000 /*?*/);
 196         if (r < 0)
 197                 dev_err(&udev->dev, "error %d on request 0x%02x\n",
 198                         -r, (unsigned)req);
 199
 200         r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
 201                              0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
 202         if (r2 < 0)
 203                 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
 204
 205         return r < 0 ? r : (r2 < 0 ? r2 : 0);
 206 }
 207
 208 /*
 209  * set the baud rate on the internal serial adapter
 210  * using the undocumented parameter setting command
 211  */
 212 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
 213 {
 214         u16 val;
 215         u32 rate;
 216
 217         cflag &= CBAUD;
 218
 219         switch (cflag) {
 220         case    B300: rate =     300; break;
 221         case    B600: rate =     600; break;
 222         case   B1200: rate =    1200; break;
 223         case   B2400: rate =    2400; break;
 224         case   B4800: rate =    4800; break;
 225         case   B9600: rate =    9600; break;
 226         case  B19200: rate =   19200; break;
 227         case  B38400: rate =   38400; break;
 228         case  B57600: rate =   57600; break;
 229         case B115200: rate =  115200; break;
 230         default:
 231                 rate =  9600;
 232                 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
 233                         " using default of B9600\n", cflag);
 234         }
 235
 236         val = 0x383fff / rate + 1;
 237
 238         return set_value(cs, 1, val);
 239 }
 240
 241 /*
 242  * set the line format on the internal serial adapter
 243  * using the undocumented parameter setting command
 244  */
 245 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
 246 {
 247         u16 val = 0;
 248
 249         /* set the parity */
 250         if (cflag & PARENB)
 251                 val |= (cflag & PARODD) ? 0x10 : 0x20;
 252
 253         /* set the number of data bits */
 254         switch (cflag & CSIZE) {
 255         case CS5:
 256                 val |= 5 << 8; break;
 257         case CS6:
 258                 val |= 6 << 8; break;
 259         case CS7:
 260                 val |= 7 << 8; break;
 261         case CS8:
 262                 val |= 8 << 8; break;
 263         default:
 264                 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
 265                 val |= 8 << 8;
 266                 break;
 267         }
 268
 269         /* set the number of stop bits */
 270         if (cflag & CSTOPB) {
 271                 if ((cflag & CSIZE) == CS5)
 272                         val |= 1; /* 1.5 stop bits */
 273                 else
 274                         val |= 2; /* 2 stop bits */
 275         }
 276
 277         return set_value(cs, 3, val);
 278 }
 279
 280
 281 /*============================================================================*/
 282 static int gigaset_init_bchannel(struct bc_state *bcs)
 283 {
 284         /* nothing to do for M10x */
 285         gigaset_bchannel_up(bcs);
 286         return 0;
 287 }
 288
 289 static int gigaset_close_bchannel(struct bc_state *bcs)
 290 {
 291         /* nothing to do for M10x */
 292         gigaset_bchannel_down(bcs);
 293         return 0;
 294 }
 295
 296 static int write_modem(struct cardstate *cs);
 297 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
 298
 299
 300 /* Write tasklet handler: Continue sending current skb, or send command, or
 301  * start sending an skb from the send queue.
 302  */
 303 static void gigaset_modem_fill(unsigned long data)
 304 {
 305         struct cardstate *cs = (struct cardstate *) data;
 306         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 307         struct cmdbuf_t *cb;
 308         int again;
 309
 310         gig_dbg(DEBUG_OUTPUT, "modem_fill");
 311
 312         if (cs->hw.usb->busy) {
 313                 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
 314                 return;
 315         }
 316
 317         do {
 318                 again = 0;
 319                 if (!bcs->tx_skb) { /* no skb is being sent */
 320                         cb = cs->cmdbuf;
 321                         if (cb) { /* commands to send? */
 322                                 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
 323                                 if (send_cb(cs, cb) < 0) {
 324                                         gig_dbg(DEBUG_OUTPUT,
 325                                                 "modem_fill: send_cb failed");
 326                                         again = 1; /* no callback will be
 327                                                       called! */
 328                                 }
 329                         } else { /* skbs to send? */
 330                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
 331                                 if (bcs->tx_skb)
 332                                         gig_dbg(DEBUG_INTR,
 333                                                 "Dequeued skb (Adr: %lx)!",
 334                                                 (unsigned long) bcs->tx_skb);
 335                         }
 336                 }
 337
 338                 if (bcs->tx_skb) {
 339                         gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
 340                         if (write_modem(cs) < 0) {
 341                                 gig_dbg(DEBUG_OUTPUT,
 342                                         "modem_fill: write_modem failed");
 343                                 again = 1; /* no callback will be called! */
 344                         }
 345                 }
 346         } while (again);
 347 }
 348
 349 /*
 350  * Interrupt Input URB completion routine
 351  */
 352 static void gigaset_read_int_callback(struct urb *urb)
 353 {
 354         struct cardstate *cs = urb->context;
 355         struct inbuf_t *inbuf = cs->inbuf;
 356         int status = urb->status;
 357         int r;
 358         unsigned numbytes;
 359         unsigned char *src;
 360         unsigned long flags;
 361
 362         if (!status) {
 363                 numbytes = urb->actual_length;
 364
 365                 if (numbytes) {
 366                         src = cs->hw.usb->rcvbuf;
 367                         if (unlikely(*src))
 368                                 dev_warn(cs->dev,
 369                                          "%s: There was no leading 0, but 0x%02x!\n",
 370                                          __func__, (unsigned) *src);
 371                         ++src; /* skip leading 0x00 */
 372                         --numbytes;
 373                         if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
 374                                 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
 375                                 gigaset_schedule_event(inbuf->cs);
 376                         }
 377                 } else
 378                         gig_dbg(DEBUG_INTR, "Received zero block length");
 379         } else {
 380                 /* The urb might have been killed. */
 381                 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
 382                         __func__, status);
 383                 if (status == -ENOENT || status == -ESHUTDOWN)
 384                         /* killed or endpoint shutdown: don't resubmit */
 385                         return;
 386         }
 387
 388         /* resubmit URB */
 389         spin_lock_irqsave(&cs->lock, flags);
 390         if (!cs->connected) {
 391                 spin_unlock_irqrestore(&cs->lock, flags);
 392                 pr_err("%s: disconnected\n", __func__);
 393                 return;
 394         }
 395         r = usb_submit_urb(urb, GFP_ATOMIC);
 396         spin_unlock_irqrestore(&cs->lock, flags);
 397         if (r)
 398                 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
 399 }
 400
 401
 402 /* This callback routine is called when data was transmitted to the device. */
 403 static void gigaset_write_bulk_callback(struct urb *urb)
 404 {
 405         struct cardstate *cs = urb->context;
 406         int status = urb->status;
 407         unsigned long flags;
 408
 409         switch (status) {
 410         case 0:                 /* normal completion */
 411                 break;
 412         case -ENOENT:           /* killed */
 413                 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
 414                 cs->hw.usb->busy = 0;
 415                 return;
 416         default:
 417                 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
 418                         -status);
 419                 /* That's all we can do. Communication problems
 420                    are handled by timeouts or network protocols. */
 421         }
 422
 423         spin_lock_irqsave(&cs->lock, flags);
 424         if (!cs->connected) {
 425                 pr_err("%s: disconnected\n", __func__);
 426         } else {
 427                 cs->hw.usb->busy = 0;
 428                 tasklet_schedule(&cs->write_tasklet);
 429         }
 430         spin_unlock_irqrestore(&cs->lock, flags);
 431 }
 432
 433 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
 434 {
 435         struct cmdbuf_t *tcb;
 436         unsigned long flags;
 437         int count;
 438         int status = -ENOENT;
 439         struct usb_cardstate *ucs = cs->hw.usb;
 440
 441         do {
 442                 if (!cb->len) {
 443                         tcb = cb;
 444
 445                         spin_lock_irqsave(&cs->cmdlock, flags);
 446                         cs->cmdbytes -= cs->curlen;
 447                         gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
 448                                 cs->curlen, cs->cmdbytes);
 449                         cs->cmdbuf = cb = cb->next;
 450                         if (cb) {
 451                                 cb->prev = NULL;
 452                                 cs->curlen = cb->len;
 453                         } else {
 454                                 cs->lastcmdbuf = NULL;
 455                                 cs->curlen = 0;
 456                         }
 457                         spin_unlock_irqrestore(&cs->cmdlock, flags);
 458
 459                         if (tcb->wake_tasklet)
 460                                 tasklet_schedule(tcb->wake_tasklet);
 461                         kfree(tcb);
 462                 }
 463                 if (cb) {
 464                         count = min(cb->len, ucs->bulk_out_size);
 465                         gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
 466
 467                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 468                                           usb_sndbulkpipe(ucs->udev,
 469                                                           ucs->bulk_out_endpointAddr & 0x0f),
 470                                           cb->buf + cb->offset, count,
 471                                           gigaset_write_bulk_callback, cs);
 472
 473                         cb->offset += count;
 474                         cb->len -= count;
 475                         ucs->busy = 1;
 476
 477                         spin_lock_irqsave(&cs->lock, flags);
 478                         status = cs->connected ?
 479                                 usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) :
 480                                 -ENODEV;
 481                         spin_unlock_irqrestore(&cs->lock, flags);
 482
 483                         if (status) {
 484                                 ucs->busy = 0;
 485                                 dev_err(cs->dev,
 486                                         "could not submit urb (error %d)\n",
 487                                         -status);
 488                                 cb->len = 0; /* skip urb => remove cb+wakeup
 489                                                 in next loop cycle */
 490                         }
 491                 }
 492         } while (cb && status); /* next command on error */
 493
 494         return status;
 495 }
 496
 497 /* Send command to device. */
 498 static int gigaset_write_cmd(struct cardstate *cs, struct cmdbuf_t *cb)
 499 {
 500         unsigned long flags;
 501
 502         gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
 503                            DEBUG_TRANSCMD : DEBUG_LOCKCMD,
 504                            "CMD Transmit", cb->len, cb->buf);
 505
 506         spin_lock_irqsave(&cs->cmdlock, flags);
 507         cb->prev = cs->lastcmdbuf;
 508         if (cs->lastcmdbuf)
 509                 cs->lastcmdbuf->next = cb;
 510         else {
 511                 cs->cmdbuf = cb;
 512                 cs->curlen = cb->len;
 513         }
 514         cs->cmdbytes += cb->len;
 515         cs->lastcmdbuf = cb;
 516         spin_unlock_irqrestore(&cs->cmdlock, flags);
 517
 518         spin_lock_irqsave(&cs->lock, flags);
 519         if (cs->connected)
 520                 tasklet_schedule(&cs->write_tasklet);
 521         spin_unlock_irqrestore(&cs->lock, flags);
 522         return cb->len;
 523 }
 524
 525 static int gigaset_write_room(struct cardstate *cs)
 526 {
 527         unsigned bytes;
 528
 529         bytes = cs->cmdbytes;
 530         return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
 531 }
 532
 533 static int gigaset_chars_in_buffer(struct cardstate *cs)
 534 {
 535         return cs->cmdbytes;
 536 }
 537
 538 /*
 539  * set the break characters on the internal serial adapter
 540  * using undocumented device commands reverse engineered from USB traces
 541  * of the Siemens Windows driver
 542  */
 543 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
 544 {
 545         struct usb_device *udev = cs->hw.usb->udev;
 546
 547         gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
 548         memcpy(cs->hw.usb->bchars, buf, 6);
 549         return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
 550                                0, 0, &buf, 6, 2000);
 551 }
 552
 553 static void gigaset_freebcshw(struct bc_state *bcs)
 554 {
 555         /* unused */
 556 }
 557
 558 /* Initialize the b-channel structure */
 559 static int gigaset_initbcshw(struct bc_state *bcs)
 560 {
 561         /* unused */
 562         bcs->hw.usb = NULL;
 563         return 0;
 564 }
 565
 566 static void gigaset_reinitbcshw(struct bc_state *bcs)
 567 {
 568         /* nothing to do for M10x */
 569 }
 570
 571 static void gigaset_freecshw(struct cardstate *cs)
 572 {
 573         tasklet_kill(&cs->write_tasklet);
 574         kfree(cs->hw.usb);
 575 }
 576
 577 static int gigaset_initcshw(struct cardstate *cs)
 578 {
 579         struct usb_cardstate *ucs;
 580
 581         cs->hw.usb = ucs =
 582                 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
 583         if (!ucs) {
 584                 pr_err("out of memory\n");
 585                 return -ENOMEM;
 586         }
 587
 588         ucs->bchars[0] = 0;
 589         ucs->bchars[1] = 0;
 590         ucs->bchars[2] = 0;
 591         ucs->bchars[3] = 0;
 592         ucs->bchars[4] = 0x11;
 593         ucs->bchars[5] = 0x13;
 594         ucs->bulk_out_buffer = NULL;
 595         ucs->bulk_out_urb = NULL;
 596         ucs->read_urb = NULL;
 597         tasklet_init(&cs->write_tasklet,
 598                      gigaset_modem_fill, (unsigned long) cs);
 599
 600         return 0;
 601 }
 602
 603 /* Send data from current skb to the device. */
 604 static int write_modem(struct cardstate *cs)
 605 {
 606         int ret = 0;
 607         int count;
 608         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 609         struct usb_cardstate *ucs = cs->hw.usb;
 610         unsigned long flags;
 611
 612         gig_dbg(DEBUG_OUTPUT, "len: %d...", bcs->tx_skb->len);
 613
 614         if (!bcs->tx_skb->len) {
 615                 dev_kfree_skb_any(bcs->tx_skb);
 616                 bcs->tx_skb = NULL;
 617                 return -EINVAL;
 618         }
 619
 620         /* Copy data to bulk out buffer and transmit data */
 621         count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
 622         skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
 623         skb_pull(bcs->tx_skb, count);
 624         ucs->busy = 1;
 625         gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
 626
 627         spin_lock_irqsave(&cs->lock, flags);
 628         if (cs->connected) {
 629                 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 630                                   usb_sndbulkpipe(ucs->udev,
 631                                                   ucs->bulk_out_endpointAddr &
 632                                                   0x0f),
 633                                   ucs->bulk_out_buffer, count,
 634                                   gigaset_write_bulk_callback, cs);
 635                 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
 636         } else {
 637                 ret = -ENODEV;
 638         }
 639         spin_unlock_irqrestore(&cs->lock, flags);
 640
 641         if (ret) {
 642                 dev_err(cs->dev, "could not submit urb (error %d)\n", -ret);
 643                 ucs->busy = 0;
 644         }
 645
 646         if (!bcs->tx_skb->len) {
 647                 /* skb sent completely */
 648                 gigaset_skb_sent(bcs, bcs->tx_skb);
 649
 650                 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
 651                         (unsigned long) bcs->tx_skb);
 652                 dev_kfree_skb_any(bcs->tx_skb);
 653                 bcs->tx_skb = NULL;
 654         }
 655
 656         return ret;
 657 }
 658
 659 static int gigaset_probe(struct usb_interface *interface,
 660                          const struct usb_device_id *id)
 661 {
 662         int retval;
 663         struct usb_device *udev = interface_to_usbdev(interface);
 664         struct usb_host_interface *hostif = interface->cur_altsetting;
 665         struct cardstate *cs = NULL;
 666         struct usb_cardstate *ucs = NULL;
 667         struct usb_endpoint_descriptor *endpoint;
 668         int buffer_size;
 669
 670         gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
 671
 672         /* See if the device offered us matches what we can accept */
 673         if ((le16_to_cpu(udev->descriptor.idVendor)  != USB_M105_VENDOR_ID) ||
 674             (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
 675                 gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
 676                         le16_to_cpu(udev->descriptor.idVendor),
 677                         le16_to_cpu(udev->descriptor.idProduct));
 678                 return -ENODEV;
 679         }
 680         if (hostif->desc.bInterfaceNumber != 0) {
 681                 gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
 682                         hostif->desc.bInterfaceNumber);
 683                 return -ENODEV;
 684         }
 685         if (hostif->desc.bAlternateSetting != 0) {
 686                 dev_notice(&udev->dev, "unsupported altsetting %d - skip",
 687                            hostif->desc.bAlternateSetting);
 688                 return -ENODEV;
 689         }
 690         if (hostif->desc.bInterfaceClass != 255) {
 691                 dev_notice(&udev->dev, "unsupported interface class %d - skip",
 692                            hostif->desc.bInterfaceClass);
 693                 return -ENODEV;
 694         }
 695
 696         dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
 697
 698         /* allocate memory for our device state and initialize it */
 699         cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
 700         if (!cs)
 701                 return -ENODEV;
 702         ucs = cs->hw.usb;
 703
 704         /* save off device structure ptrs for later use */
 705         usb_get_dev(udev);
 706         ucs->udev = udev;
 707         ucs->interface = interface;
 708         cs->dev = &interface->dev;
 709
 710         /* save address of controller structure */
 711         usb_set_intfdata(interface, cs);
 712
 713         endpoint = &hostif->endpoint[0].desc;
 714
 715         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 716         ucs->bulk_out_size = buffer_size;
 717         ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
 718         ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
 719         if (!ucs->bulk_out_buffer) {
 720                 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
 721                 retval = -ENOMEM;
 722                 goto error;
 723         }
 724
 725         ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
 726         if (!ucs->bulk_out_urb) {
 727                 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
 728                 retval = -ENOMEM;
 729                 goto error;
 730         }
 731
 732         endpoint = &hostif->endpoint[1].desc;
 733
 734         ucs->busy = 0;
 735
 736         ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
 737         if (!ucs->read_urb) {
 738                 dev_err(cs->dev, "No free urbs available\n");
 739                 retval = -ENOMEM;
 740                 goto error;
 741         }
 742         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 743         ucs->rcvbuf_size = buffer_size;
 744         ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
 745         ucs->rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
 746         if (!ucs->rcvbuf) {
 747                 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
 748                 retval = -ENOMEM;
 749                 goto error;
 750         }
 751         /* Fill the interrupt urb and send it to the core */
 752         usb_fill_int_urb(ucs->read_urb, udev,
 753                          usb_rcvintpipe(udev,
 754                                         endpoint->bEndpointAddress & 0x0f),
 755                          ucs->rcvbuf, buffer_size,
 756                          gigaset_read_int_callback,
 757                          cs, endpoint->bInterval);
 758
 759         retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
 760         if (retval) {
 761                 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
 762                 goto error;
 763         }
 764
 765         /* tell common part that the device is ready */
 766         if (startmode == SM_LOCKED)
 767                 cs->mstate = MS_LOCKED;
 768
 769         retval = gigaset_start(cs);
 770         if (retval < 0) {
 771                 tasklet_kill(&cs->write_tasklet);
 772                 goto error;
 773         }
 774         return 0;
 775
 776 error:
 777         usb_kill_urb(ucs->read_urb);
 778         kfree(ucs->bulk_out_buffer);
 779         usb_free_urb(ucs->bulk_out_urb);
 780         kfree(ucs->rcvbuf);
 781         usb_free_urb(ucs->read_urb);
 782         usb_set_intfdata(interface, NULL);
 783         ucs->read_urb = ucs->bulk_out_urb = NULL;
 784         ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
 785         usb_put_dev(ucs->udev);
 786         ucs->udev = NULL;
 787         ucs->interface = NULL;
 788         gigaset_freecs(cs);
 789         return retval;
 790 }
 791
 792 static void gigaset_disconnect(struct usb_interface *interface)
 793 {
 794         struct cardstate *cs;
 795         struct usb_cardstate *ucs;
 796
 797         cs = usb_get_intfdata(interface);
 798         ucs = cs->hw.usb;
 799
 800         dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
 801
 802         usb_kill_urb(ucs->read_urb);
 803
 804         gigaset_stop(cs);
 805
 806         usb_set_intfdata(interface, NULL);
 807         tasklet_kill(&cs->write_tasklet);
 808
 809         usb_kill_urb(ucs->bulk_out_urb);
 810
 811         kfree(ucs->bulk_out_buffer);
 812         usb_free_urb(ucs->bulk_out_urb);
 813         kfree(ucs->rcvbuf);
 814         usb_free_urb(ucs->read_urb);
 815         ucs->read_urb = ucs->bulk_out_urb = NULL;
 816         ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
 817
 818         usb_put_dev(ucs->udev);
 819         ucs->interface = NULL;
 820         ucs->udev = NULL;
 821         cs->dev = NULL;
 822         gigaset_freecs(cs);
 823 }
 824
 825 /* gigaset_suspend
 826  * This function is called before the USB connection is suspended or reset.
 827  */
 828 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
 829 {
 830         struct cardstate *cs = usb_get_intfdata(intf);
 831
 832         /* stop activity */
 833         cs->connected = 0;      /* prevent rescheduling */
 834         usb_kill_urb(cs->hw.usb->read_urb);
 835         tasklet_kill(&cs->write_tasklet);
 836         usb_kill_urb(cs->hw.usb->bulk_out_urb);
 837
 838         gig_dbg(DEBUG_SUSPEND, "suspend complete");
 839         return 0;
 840 }
 841
 842 /* gigaset_resume
 843  * This function is called after the USB connection has been resumed or reset.
 844  */
 845 static int gigaset_resume(struct usb_interface *intf)
 846 {
 847         struct cardstate *cs = usb_get_intfdata(intf);
 848         int rc;
 849
 850         /* resubmit interrupt URB */
 851         cs->connected = 1;
 852         rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
 853         if (rc) {
 854                 dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
 855                 return rc;
 856         }
 857
 858         gig_dbg(DEBUG_SUSPEND, "resume complete");
 859         return 0;
 860 }
 861
 862 /* gigaset_pre_reset
 863  * This function is called before the USB connection is reset.
 864  */
 865 static int gigaset_pre_reset(struct usb_interface *intf)
 866 {
 867         /* same as suspend */
 868         return gigaset_suspend(intf, PMSG_ON);
 869 }
 870
 871 static const struct gigaset_ops ops = {
 872         gigaset_write_cmd,
 873         gigaset_write_room,
 874         gigaset_chars_in_buffer,
 875         gigaset_brkchars,
 876         gigaset_init_bchannel,
 877         gigaset_close_bchannel,
 878         gigaset_initbcshw,
 879         gigaset_freebcshw,
 880         gigaset_reinitbcshw,
 881         gigaset_initcshw,
 882         gigaset_freecshw,
 883         gigaset_set_modem_ctrl,
 884         gigaset_baud_rate,
 885         gigaset_set_line_ctrl,
 886         gigaset_m10x_send_skb,
 887         gigaset_m10x_input,
 888 };
 889
 890 /*
 891  * This function is called while kernel-module is loaded
 892  */
 893 static int __init usb_gigaset_init(void)
 894 {
 895         int result;
 896
 897         /* allocate memory for our driver state and initialize it */
 898         driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
 899                                     GIGASET_MODULENAME, GIGASET_DEVNAME,
 900                                     &ops, THIS_MODULE);
 901         if (driver == NULL) {
 902                 result = -ENOMEM;
 903                 goto error;
 904         }
 905
 906         /* register this driver with the USB subsystem */
 907         result = usb_register(&gigaset_usb_driver);
 908         if (result < 0) {
 909                 pr_err("error %d registering USB driver\n", -result);
 910                 goto error;
 911         }
 912
 913         pr_info(DRIVER_DESC "\n");
 914         return 0;
 915
 916 error:
 917         if (driver)
 918                 gigaset_freedriver(driver);
 919         driver = NULL;
 920         return result;
 921 }
 922
 923 /*
 924  * This function is called while unloading the kernel-module
 925  */
 926 static void __exit usb_gigaset_exit(void)
 927 {
 928         int i;
 929
 930         gigaset_blockdriver(driver); /* => probe will fail
 931                                       * => no gigaset_start any more
 932                                       */
 933
 934         /* stop all connected devices */
 935         for (i = 0; i < driver->minors; i++)
 936                 gigaset_shutdown(driver->cs + i);
 937
 938         /* from now on, no isdn callback should be possible */
 939
 940         /* deregister this driver with the USB subsystem */
 941         usb_deregister(&gigaset_usb_driver);
 942         /* this will call the disconnect-callback */
 943         /* from now on, no disconnect/probe callback should be running */
 944
 945         gigaset_freedriver(driver);
 946         driver = NULL;
 947 }
 948
 949
 950 module_init(usb_gigaset_init);
 951 module_exit(usb_gigaset_exit);
 952
 953 MODULE_AUTHOR(DRIVER_AUTHOR);
 954 MODULE_DESCRIPTION(DRIVER_DESC);
 955
 956 MODULE_LICENSE("GPL");