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