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