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