SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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
  20 #include <linux/errno.h>
  21 #include <linux/init.h>
  22 #include <linux/slab.h>
  23 #include <linux/usb.h>
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26
  27 /* Version Information */
  28 #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
  29 #define DRIVER_DESC "USB Driver for Gigaset 307x using M105"
  30
  31 /* Module parameters */
  32
  33 static int startmode = SM_ISDN;
  34 static int cidmode = 1;
  35
  36 module_param(startmode, int, S_IRUGO);
  37 module_param(cidmode, int, S_IRUGO);
  38 MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
  39 MODULE_PARM_DESC(cidmode, "Call-ID mode");
  40
  41 #define GIGASET_MINORS     1
  42 #define GIGASET_MINOR      8
  43 #define GIGASET_MODULENAME "usb_gigaset"
  44 #define GIGASET_DEVNAME    "ttyGU"
  45
  46 #define IF_WRITEBUF 2000        /* arbitrary limit */
  47
  48 /* Values for the Gigaset M105 Data */
  49 #define USB_M105_VENDOR_ID      0x0681
  50 #define USB_M105_PRODUCT_ID     0x0009
  51
  52 /* table of devices that work with this driver */
  53 static const struct usb_device_id gigaset_table[] = {
  54         { USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
  55         { }                                     /* Terminating entry */
  56 };
  57
  58 MODULE_DEVICE_TABLE(usb, gigaset_table);
  59
  60 /*
  61  * Control requests (empty fields: 00)
  62  *
  63  *       RT|RQ|VALUE|INDEX|LEN  |DATA
  64  * In:
  65  *       C1 08             01
  66  *            Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
  67  *       C1 0F             ll ll
  68  *            Get device information/status (llll: 0x200 and 0x40 seen).
  69  *            Real size: I only saw MIN(llll,0x64).
  70  *            Contents: seems to be always the same...
  71  *              offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
  72  *              offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
  73  *              rest:        ?
  74  * Out:
  75  *       41 11
  76  *            Initialize/reset device ?
  77  *       41 00 xx 00
  78  *            ? (xx=00 or 01; 01 on start, 00 on close)
  79  *       41 07 vv mm
  80  *            Set/clear flags vv=value, mm=mask (see RQ 08)
  81  *       41 12 xx
  82  *            Used before the following configuration requests are issued
  83  *            (with xx=0x0f). I've seen other values<0xf, though.
  84  *       41 01 xx xx
  85  *            Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
  86  *       41 03 ps bb
  87  *            Set byte size and parity. p:  0x20=even,0x10=odd,0x00=no parity
  88  *                                     [    0x30: m, 0x40: s           ]
  89  *                                     [s:  0: 1 stop bit; 1: 1.5; 2: 2]
  90  *                                      bb: bits/byte (seen 7 and 8)
  91  *       41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
  92  *            ??
  93  *            Initialization: 01, 40, 00, 00
  94  *            Open device:    00  40, 00, 00
  95  *            yy and zz seem to be equal, either 0x00 or 0x0a
  96  *            (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
  97  *       41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
  98  *            Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
  99  *            xx is usually 0x00 but was 0x7e before starting data transfer
 100  *            in unimodem mode. So, this might be an array of characters that
 101  *            need special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
 102  *
 103  * Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
 104  * flags per packet.
 105  */
 106
 107 /* functions called if a device of this driver is connected/disconnected */
 108 static int gigaset_probe(struct usb_interface *interface,
 109                          const struct usb_device_id *id);
 110 static void gigaset_disconnect(struct usb_interface *interface);
 111
 112 /* functions called before/after suspend */
 113 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
 114 static int gigaset_resume(struct usb_interface *intf);
 115 static int gigaset_pre_reset(struct usb_interface *intf);
 116
 117 static struct gigaset_driver *driver;
 118
 119 /* usb specific object needed to register this driver with the usb subsystem */
 120 static struct usb_driver gigaset_usb_driver = {
 121         .name =         GIGASET_MODULENAME,
 122         .probe =        gigaset_probe,
 123         .disconnect =   gigaset_disconnect,
 124         .id_table =     gigaset_table,
 125         .suspend =      gigaset_suspend,
 126         .resume =       gigaset_resume,
 127         .reset_resume = gigaset_resume,
 128         .pre_reset =    gigaset_pre_reset,
 129         .post_reset =   gigaset_resume,
 130 };
 131
 132 struct usb_cardstate {
 133         struct usb_device       *udev;          /* usb device pointer */
 134         struct usb_interface    *interface;     /* interface for this device */
 135         int                     busy;           /* bulk output in progress */
 136
 137         /* Output buffer */
 138         unsigned char           *bulk_out_buffer;
 139         int                     bulk_out_size;
 140         __u8                    bulk_out_endpointAddr;
 141         struct urb              *bulk_out_urb;
 142
 143         /* Input buffer */
 144         unsigned char           *rcvbuf;
 145         int                     rcvbuf_size;
 146         struct urb              *read_urb;
 147         __u8                    int_in_endpointAddr;
 148
 149         char                    bchars[6];              /* for request 0x19 */
 150 };
 151
 152 static inline unsigned tiocm_to_gigaset(unsigned state)
 153 {
 154         return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
 155 }
 156
 157 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
 158                                   unsigned new_state)
 159 {
 160         struct usb_device *udev = cs->hw.usb->udev;
 161         unsigned mask, val;
 162         int r;
 163
 164         mask = tiocm_to_gigaset(old_state ^ new_state);
 165         val = tiocm_to_gigaset(new_state);
 166
 167         gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
 168         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
 169                             (val & 0xff) | ((mask & 0xff) << 8), 0,
 170                             NULL, 0, 2000 /* timeout? */);
 171         if (r < 0)
 172                 return r;
 173         return 0;
 174 }
 175
 176 /*
 177  * Set M105 configuration value
 178  * using undocumented device commands reverse engineered from USB traces
 179  * of the Siemens Windows driver
 180  */
 181 static int set_value(struct cardstate *cs, u8 req, u16 val)
 182 {
 183         struct usb_device *udev = cs->hw.usb->udev;
 184         int r, r2;
 185
 186         gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
 187                 (unsigned)req, (unsigned)val);
 188         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
 189                             0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
 190                             /* no idea what this does */
 191         if (r < 0) {
 192                 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
 193                 return r;
 194         }
 195
 196         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
 197                             val, 0, NULL, 0, 2000 /*?*/);
 198         if (r < 0)
 199                 dev_err(&udev->dev, "error %d on request 0x%02x\n",
 200                         -r, (unsigned)req);
 201
 202         r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
 203                              0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
 204         if (r2 < 0)
 205                 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
 206
 207         return r < 0 ? r : (r2 < 0 ? r2 : 0);
 208 }
 209
 210 /*
 211  * set the baud rate on the internal serial adapter
 212  * using the undocumented parameter setting command
 213  */
 214 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
 215 {
 216         u16 val;
 217         u32 rate;
 218
 219         cflag &= CBAUD;
 220
 221         switch (cflag) {
 222         case    B300: rate =     300; break;
 223         case    B600: rate =     600; break;
 224         case   B1200: rate =    1200; break;
 225         case   B2400: rate =    2400; break;
 226         case   B4800: rate =    4800; break;
 227         case   B9600: rate =    9600; break;
 228         case  B19200: rate =   19200; break;
 229         case  B38400: rate =   38400; break;
 230         case  B57600: rate =   57600; break;
 231         case B115200: rate =  115200; break;
 232         default:
 233                 rate =  9600;
 234                 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
 235                         " using default of B9600\n", cflag);
 236         }
 237
 238         val = 0x383fff / rate + 1;
 239
 240         return set_value(cs, 1, val);
 241 }
 242
 243 /*
 244  * set the line format on the internal serial adapter
 245  * using the undocumented parameter setting command
 246  */
 247 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
 248 {
 249         u16 val = 0;
 250
 251         /* set the parity */
 252         if (cflag & PARENB)
 253                 val |= (cflag & PARODD) ? 0x10 : 0x20;
 254
 255         /* set the number of data bits */
 256         switch (cflag & CSIZE) {
 257         case CS5:
 258                 val |= 5 << 8; break;
 259         case CS6:
 260                 val |= 6 << 8; break;
 261         case CS7:
 262                 val |= 7 << 8; break;
 263         case CS8:
 264                 val |= 8 << 8; break;
 265         default:
 266                 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
 267                 val |= 8 << 8;
 268                 break;
 269         }
 270
 271         /* set the number of stop bits */
 272         if (cflag & CSTOPB) {
 273                 if ((cflag & CSIZE) == CS5)
 274                         val |= 1; /* 1.5 stop bits */
 275                 else
 276                         val |= 2; /* 2 stop bits */
 277         }
 278
 279         return set_value(cs, 3, val);
 280 }
 281
 282
 283 /*============================================================================*/
 284 static int gigaset_init_bchannel(struct bc_state *bcs)
 285 {
 286         /* nothing to do for M10x */
 287         gigaset_bchannel_up(bcs);
 288         return 0;
 289 }
 290
 291 static int gigaset_close_bchannel(struct bc_state *bcs)
 292 {
 293         /* nothing to do for M10x */
 294         gigaset_bchannel_down(bcs);
 295         return 0;
 296 }
 297
 298 static int write_modem(struct cardstate *cs);
 299 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
 300
 301
 302 /* Write tasklet handler: Continue sending current skb, or send command, or
 303  * start sending an skb from the send queue.
 304  */
 305 static void gigaset_modem_fill(unsigned long data)
 306 {
 307         struct cardstate *cs = (struct cardstate *) data;
 308         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 309         struct cmdbuf_t *cb;
 310         int again;
 311
 312         gig_dbg(DEBUG_OUTPUT, "modem_fill");
 313
 314         if (cs->hw.usb->busy) {
 315                 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
 316                 return;
 317         }
 318
 319         do {
 320                 again = 0;
 321                 if (!bcs->tx_skb) { /* no skb is being sent */
 322                         cb = cs->cmdbuf;
 323                         if (cb) { /* commands to send? */
 324                                 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
 325                                 if (send_cb(cs, cb) < 0) {
 326                                         gig_dbg(DEBUG_OUTPUT,
 327                                                 "modem_fill: send_cb failed");
 328                                         again = 1; /* no callback will be
 329                                                       called! */
 330                                 }
 331                         } else { /* skbs to send? */
 332                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
 333                                 if (bcs->tx_skb)
 334                                         gig_dbg(DEBUG_INTR,
 335                                                 "Dequeued skb (Adr: %lx)!",
 336                                                 (unsigned long) bcs->tx_skb);
 337                         }
 338                 }
 339
 340                 if (bcs->tx_skb) {
 341                         gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
 342                         if (write_modem(cs) < 0) {
 343                                 gig_dbg(DEBUG_OUTPUT,
 344                                         "modem_fill: write_modem failed");
 345                                 again = 1; /* no callback will be called! */
 346                         }
 347                 }
 348         } while (again);
 349 }
 350
 351 /*
 352  * Interrupt Input URB completion routine
 353  */
 354 static void gigaset_read_int_callback(struct urb *urb)
 355 {
 356         struct cardstate *cs = urb->context;
 357         struct inbuf_t *inbuf = cs->inbuf;
 358         int status = urb->status;
 359         int r;
 360         unsigned numbytes;
 361         unsigned char *src;
 362         unsigned long flags;
 363
 364         if (!status) {
 365                 numbytes = urb->actual_length;
 366
 367                 if (numbytes) {
 368                         src = cs->hw.usb->rcvbuf;
 369                         if (unlikely(*src))
 370                                 dev_warn(cs->dev,
 371                                     "%s: There was no leading 0, but 0x%02x!\n",
 372                                          __func__, (unsigned) *src);
 373                         ++src; /* skip leading 0x00 */
 374                         --numbytes;
 375                         if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
 376                                 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
 377                                 gigaset_schedule_event(inbuf->cs);
 378                         }
 379                 } else
 380                         gig_dbg(DEBUG_INTR, "Received zero block length");
 381         } else {
 382                 /* The urb might have been killed. */
 383                 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
 384                         __func__, status);
 385                 if (status == -ENOENT || status == -ESHUTDOWN)
 386                         /* killed or endpoint shutdown: don't resubmit */
 387                         return;
 388         }
 389
 390         /* resubmit URB */
 391         spin_lock_irqsave(&cs->lock, flags);
 392         if (!cs->connected) {
 393                 spin_unlock_irqrestore(&cs->lock, flags);
 394                 pr_err("%s: disconnected\n", __func__);
 395                 return;
 396         }
 397         r = usb_submit_urb(urb, GFP_ATOMIC);
 398         spin_unlock_irqrestore(&cs->lock, flags);
 399         if (r)
 400                 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
 401 }
 402
 403
 404 /* This callback routine is called when data was transmitted to the device. */
 405 static void gigaset_write_bulk_callback(struct urb *urb)
 406 {
 407         struct cardstate *cs = urb->context;
 408         int status = urb->status;
 409         unsigned long flags;
 410
 411         switch (status) {
 412         case 0:                 /* normal completion */
 413                 break;
 414         case -ENOENT:           /* killed */
 415                 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
 416                 cs->hw.usb->busy = 0;
 417                 return;
 418         default:
 419                 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
 420                         -status);
 421                 /* That's all we can do. Communication problems
 422                    are handled by timeouts or network protocols. */
 423         }
 424
 425         spin_lock_irqsave(&cs->lock, flags);
 426         if (!cs->connected) {
 427                 pr_err("%s: disconnected\n", __func__);
 428         } else {
 429                 cs->hw.usb->busy = 0;
 430                 tasklet_schedule(&cs->write_tasklet);
 431         }
 432         spin_unlock_irqrestore(&cs->lock, flags);
 433 }
 434
 435 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
 436 {
 437         struct cmdbuf_t *tcb;
 438         unsigned long flags;
 439         int count;
 440         int status = -ENOENT;
 441         struct usb_cardstate *ucs = cs->hw.usb;
 442
 443         do {
 444                 if (!cb->len) {
 445                         tcb = cb;
 446
 447                         spin_lock_irqsave(&cs->cmdlock, flags);
 448                         cs->cmdbytes -= cs->curlen;
 449                         gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
 450                                 cs->curlen, cs->cmdbytes);
 451                         cs->cmdbuf = cb = cb->next;
 452                         if (cb) {
 453                                 cb->prev = NULL;
 454                                 cs->curlen = cb->len;
 455                         } else {
 456                                 cs->lastcmdbuf = NULL;
 457                                 cs->curlen = 0;
 458                         }
 459                         spin_unlock_irqrestore(&cs->cmdlock, flags);
 460
 461                         if (tcb->wake_tasklet)
 462                                 tasklet_schedule(tcb->wake_tasklet);
 463                         kfree(tcb);
 464                 }
 465                 if (cb) {
 466                         count = min(cb->len, ucs->bulk_out_size);
 467                         gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
 468
 469                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 470                                           usb_sndbulkpipe(ucs->udev,
 471                                              ucs->bulk_out_endpointAddr & 0x0f),
 472                                           cb->buf + cb->offset, count,
 473                                           gigaset_write_bulk_callback, cs);
 474
 475                         cb->offset += count;
 476                         cb->len -= count;
 477                         ucs->busy = 1;
 478
 479                         spin_lock_irqsave(&cs->lock, flags);
 480                         status = cs->connected ?
 481                                 usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) :
 482                                 -ENODEV;
 483                         spin_unlock_irqrestore(&cs->lock, flags);
 484
 485                         if (status) {
 486                                 ucs->busy = 0;
 487                                 dev_err(cs->dev,
 488                                         "could not submit urb (error %d)\n",
 489                                         -status);
 490                                 cb->len = 0; /* skip urb => remove cb+wakeup
 491                                                 in next loop cycle */
 492                         }
 493                 }
 494         } while (cb && status); /* next command on error */
 495
 496         return status;
 497 }
 498
 499 /* Send command to device. */
 500 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
 501                              int len, struct tasklet_struct *wake_tasklet)
 502 {
 503         struct cmdbuf_t *cb;
 504         unsigned long flags;
 505
 506         gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
 507                              DEBUG_TRANSCMD : DEBUG_LOCKCMD,
 508                            "CMD Transmit", len, buf);
 509
 510         if (len <= 0)
 511                 return 0;
 512         cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC);
 513         if (!cb) {
 514                 dev_err(cs->dev, "%s: out of memory\n", __func__);
 515                 return -ENOMEM;
 516         }
 517
 518         memcpy(cb->buf, buf, len);
 519         cb->len = len;
 520         cb->offset = 0;
 521         cb->next = NULL;
 522         cb->wake_tasklet = wake_tasklet;
 523
 524         spin_lock_irqsave(&cs->cmdlock, flags);
 525         cb->prev = cs->lastcmdbuf;
 526         if (cs->lastcmdbuf)
 527                 cs->lastcmdbuf->next = cb;
 528         else {
 529                 cs->cmdbuf = cb;
 530                 cs->curlen = len;
 531         }
 532         cs->cmdbytes += len;
 533         cs->lastcmdbuf = cb;
 534         spin_unlock_irqrestore(&cs->cmdlock, flags);
 535
 536         spin_lock_irqsave(&cs->lock, flags);
 537         if (cs->connected)
 538                 tasklet_schedule(&cs->write_tasklet);
 539         spin_unlock_irqrestore(&cs->lock, flags);
 540         return len;
 541 }
 542
 543 static int gigaset_write_room(struct cardstate *cs)
 544 {
 545         unsigned bytes;
 546
 547         bytes = cs->cmdbytes;
 548         return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
 549 }
 550
 551 static int gigaset_chars_in_buffer(struct cardstate *cs)
 552 {
 553         return cs->cmdbytes;
 554 }
 555
 556 /*
 557  * set the break characters on the internal serial adapter
 558  * using undocumented device commands reverse engineered from USB traces
 559  * of the Siemens Windows driver
 560  */
 561 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
 562 {
 563         struct usb_device *udev = cs->hw.usb->udev;
 564
 565         gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
 566         memcpy(cs->hw.usb->bchars, buf, 6);
 567         return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
 568                                0, 0, &buf, 6, 2000);
 569 }
 570
 571 static int gigaset_freebcshw(struct bc_state *bcs)
 572 {
 573         /* unused */
 574         return 1;
 575 }
 576
 577 /* Initialize the b-channel structure */
 578 static int gigaset_initbcshw(struct bc_state *bcs)
 579 {
 580         /* unused */
 581         bcs->hw.usb = NULL;
 582         return 1;
 583 }
 584
 585 static void gigaset_reinitbcshw(struct bc_state *bcs)
 586 {
 587         /* nothing to do for M10x */
 588 }
 589
 590 static void gigaset_freecshw(struct cardstate *cs)
 591 {
 592         tasklet_kill(&cs->write_tasklet);
 593         kfree(cs->hw.usb);
 594 }
 595
 596 static int gigaset_initcshw(struct cardstate *cs)
 597 {
 598         struct usb_cardstate *ucs;
 599
 600         cs->hw.usb = ucs =
 601                 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
 602         if (!ucs) {
 603                 pr_err("out of memory\n");
 604                 return 0;
 605         }
 606
 607         ucs->bchars[0] = 0;
 608         ucs->bchars[1] = 0;
 609         ucs->bchars[2] = 0;
 610         ucs->bchars[3] = 0;
 611         ucs->bchars[4] = 0x11;
 612         ucs->bchars[5] = 0x13;
 613         ucs->bulk_out_buffer = NULL;
 614         ucs->bulk_out_urb = NULL;
 615         ucs->read_urb = NULL;
 616         tasklet_init(&cs->write_tasklet,
 617                      gigaset_modem_fill, (unsigned long) cs);
 618
 619         return 1;
 620 }
 621
 622 /* Send data from current skb to the device. */
 623 static int write_modem(struct cardstate *cs)
 624 {
 625         int ret = 0;
 626         int count;
 627         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 628         struct usb_cardstate *ucs = cs->hw.usb;
 629         unsigned long flags;
 630
 631         gig_dbg(DEBUG_OUTPUT, "len: %d...", bcs->tx_skb->len);
 632
 633         if (!bcs->tx_skb->len) {
 634                 dev_kfree_skb_any(bcs->tx_skb);
 635                 bcs->tx_skb = NULL;
 636                 return -EINVAL;
 637         }
 638
 639         /* Copy data to bulk out buffer and transmit data */
 640         count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
 641         skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
 642         skb_pull(bcs->tx_skb, count);
 643         ucs->busy = 1;
 644         gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
 645
 646         spin_lock_irqsave(&cs->lock, flags);
 647         if (cs->connected) {
 648                 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 649                                   usb_sndbulkpipe(ucs->udev,
 650                                                   ucs->bulk_out_endpointAddr &
 651                                                   0x0f),
 652                                   ucs->bulk_out_buffer, count,
 653                                   gigaset_write_bulk_callback, cs);
 654                 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
 655         } else {
 656                 ret = -ENODEV;
 657         }
 658         spin_unlock_irqrestore(&cs->lock, flags);
 659
 660         if (ret) {
 661                 dev_err(cs->dev, "could not submit urb (error %d)\n", -ret);
 662                 ucs->busy = 0;
 663         }
 664
 665         if (!bcs->tx_skb->len) {
 666                 /* skb sent completely */
 667                 gigaset_skb_sent(bcs, bcs->tx_skb);
 668
 669                 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
 670                         (unsigned long) bcs->tx_skb);
 671                 dev_kfree_skb_any(bcs->tx_skb);
 672                 bcs->tx_skb = NULL;
 673         }
 674
 675         return ret;
 676 }
 677
 678 static int gigaset_probe(struct usb_interface *interface,
 679                          const struct usb_device_id *id)
 680 {
 681         int retval;
 682         struct usb_device *udev = interface_to_usbdev(interface);
 683         struct usb_host_interface *hostif = interface->cur_altsetting;
 684         struct cardstate *cs = NULL;
 685         struct usb_cardstate *ucs = NULL;
 686         struct usb_endpoint_descriptor *endpoint;
 687         int buffer_size;
 688
 689         gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
 690
 691         /* See if the device offered us matches what we can accept */
 692         if ((le16_to_cpu(udev->descriptor.idVendor)  != USB_M105_VENDOR_ID) ||
 693             (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
 694                 gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
 695                         le16_to_cpu(udev->descriptor.idVendor),
 696                         le16_to_cpu(udev->descriptor.idProduct));
 697                 return -ENODEV;
 698         }
 699         if (hostif->desc.bInterfaceNumber != 0) {
 700                 gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
 701                         hostif->desc.bInterfaceNumber);
 702                 return -ENODEV;
 703         }
 704         if (hostif->desc.bAlternateSetting != 0) {
 705                 dev_notice(&udev->dev, "unsupported altsetting %d - skip",
 706                            hostif->desc.bAlternateSetting);
 707                 return -ENODEV;
 708         }
 709         if (hostif->desc.bInterfaceClass != 255) {
 710                 dev_notice(&udev->dev, "unsupported interface class %d - skip",
 711                            hostif->desc.bInterfaceClass);
 712                 return -ENODEV;
 713         }
 714
 715         dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
 716
 717         /* allocate memory for our device state and intialize it */
 718         cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
 719         if (!cs)
 720                 return -ENODEV;
 721         ucs = cs->hw.usb;
 722
 723         /* save off device structure ptrs for later use */
 724         usb_get_dev(udev);
 725         ucs->udev = udev;
 726         ucs->interface = interface;
 727         cs->dev = &interface->dev;
 728
 729         /* save address of controller structure */
 730         usb_set_intfdata(interface, cs);
 731
 732         endpoint = &hostif->endpoint[0].desc;
 733
 734         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 735         ucs->bulk_out_size = buffer_size;
 736         ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
 737         ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
 738         if (!ucs->bulk_out_buffer) {
 739                 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
 740                 retval = -ENOMEM;
 741                 goto error;
 742         }
 743
 744         ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
 745         if (!ucs->bulk_out_urb) {
 746                 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
 747                 retval = -ENOMEM;
 748                 goto error;
 749         }
 750
 751         endpoint = &hostif->endpoint[1].desc;
 752
 753         ucs->busy = 0;
 754
 755         ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
 756         if (!ucs->read_urb) {
 757                 dev_err(cs->dev, "No free urbs available\n");
 758                 retval = -ENOMEM;
 759                 goto error;
 760         }
 761         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 762         ucs->rcvbuf_size = buffer_size;
 763         ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
 764         ucs->rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
 765         if (!ucs->rcvbuf) {
 766                 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
 767                 retval = -ENOMEM;
 768                 goto error;
 769         }
 770         /* Fill the interrupt urb and send it to the core */
 771         usb_fill_int_urb(ucs->read_urb, udev,
 772                          usb_rcvintpipe(udev,
 773                                         endpoint->bEndpointAddress & 0x0f),
 774                          ucs->rcvbuf, buffer_size,
 775                          gigaset_read_int_callback,
 776                          cs, endpoint->bInterval);
 777
 778         retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
 779         if (retval) {
 780                 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
 781                 goto error;
 782         }
 783
 784         /* tell common part that the device is ready */
 785         if (startmode == SM_LOCKED)
 786                 cs->mstate = MS_LOCKED;
 787
 788         if (!gigaset_start(cs)) {
 789                 tasklet_kill(&cs->write_tasklet);
 790                 retval = -ENODEV;
 791                 goto error;
 792         }
 793         return 0;
 794
 795 error:
 796         usb_kill_urb(ucs->read_urb);
 797         kfree(ucs->bulk_out_buffer);
 798         usb_free_urb(ucs->bulk_out_urb);
 799         kfree(ucs->rcvbuf);
 800         usb_free_urb(ucs->read_urb);
 801         usb_set_intfdata(interface, NULL);
 802         ucs->read_urb = ucs->bulk_out_urb = NULL;
 803         ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
 804         usb_put_dev(ucs->udev);
 805         ucs->udev = NULL;
 806         ucs->interface = NULL;
 807         gigaset_freecs(cs);
 808         return retval;
 809 }
 810
 811 static void gigaset_disconnect(struct usb_interface *interface)
 812 {
 813         struct cardstate *cs;
 814         struct usb_cardstate *ucs;
 815
 816         cs = usb_get_intfdata(interface);
 817         ucs = cs->hw.usb;
 818
 819         dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
 820
 821         usb_kill_urb(ucs->read_urb);
 822
 823         gigaset_stop(cs);
 824
 825         usb_set_intfdata(interface, NULL);
 826         tasklet_kill(&cs->write_tasklet);
 827
 828         usb_kill_urb(ucs->bulk_out_urb);
 829
 830         kfree(ucs->bulk_out_buffer);
 831         usb_free_urb(ucs->bulk_out_urb);
 832         kfree(ucs->rcvbuf);
 833         usb_free_urb(ucs->read_urb);
 834         ucs->read_urb = ucs->bulk_out_urb = NULL;
 835         ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
 836
 837         usb_put_dev(ucs->udev);
 838         ucs->interface = NULL;
 839         ucs->udev = NULL;
 840         cs->dev = NULL;
 841         gigaset_freecs(cs);
 842 }
 843
 844 /* gigaset_suspend
 845  * This function is called before the USB connection is suspended or reset.
 846  */
 847 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
 848 {
 849         struct cardstate *cs = usb_get_intfdata(intf);
 850
 851         /* stop activity */
 852         cs->connected = 0;      /* prevent rescheduling */
 853         usb_kill_urb(cs->hw.usb->read_urb);
 854         tasklet_kill(&cs->write_tasklet);
 855         usb_kill_urb(cs->hw.usb->bulk_out_urb);
 856
 857         gig_dbg(DEBUG_SUSPEND, "suspend complete");
 858         return 0;
 859 }
 860
 861 /* gigaset_resume
 862  * This function is called after the USB connection has been resumed or reset.
 863  */
 864 static int gigaset_resume(struct usb_interface *intf)
 865 {
 866         struct cardstate *cs = usb_get_intfdata(intf);
 867         int rc;
 868
 869         /* resubmit interrupt URB */
 870         cs->connected = 1;
 871         rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
 872         if (rc) {
 873                 dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
 874                 return rc;
 875         }
 876
 877         gig_dbg(DEBUG_SUSPEND, "resume complete");
 878         return 0;
 879 }
 880
 881 /* gigaset_pre_reset
 882  * This function is called before the USB connection is reset.
 883  */
 884 static int gigaset_pre_reset(struct usb_interface *intf)
 885 {
 886         /* same as suspend */
 887         return gigaset_suspend(intf, PMSG_ON);
 888 }
 889
 890 static const struct gigaset_ops ops = {
 891         gigaset_write_cmd,
 892         gigaset_write_room,
 893         gigaset_chars_in_buffer,
 894         gigaset_brkchars,
 895         gigaset_init_bchannel,
 896         gigaset_close_bchannel,
 897         gigaset_initbcshw,
 898         gigaset_freebcshw,
 899         gigaset_reinitbcshw,
 900         gigaset_initcshw,
 901         gigaset_freecshw,
 902         gigaset_set_modem_ctrl,
 903         gigaset_baud_rate,
 904         gigaset_set_line_ctrl,
 905         gigaset_m10x_send_skb,
 906         gigaset_m10x_input,
 907 };
 908
 909 /*
 910  * This function is called while kernel-module is loaded
 911  */
 912 static int __init usb_gigaset_init(void)
 913 {
 914         int result;
 915
 916         /* allocate memory for our driver state and intialize it */
 917         driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
 918                                     GIGASET_MODULENAME, GIGASET_DEVNAME,
 919                                     &ops, THIS_MODULE);
 920         if (driver == NULL)
 921                 goto error;
 922
 923         /* register this driver with the USB subsystem */
 924         result = usb_register(&gigaset_usb_driver);
 925         if (result < 0) {
 926                 pr_err("error %d registering USB driver\n", -result);
 927                 goto error;
 928         }
 929
 930         pr_info(DRIVER_DESC "\n");
 931         return 0;
 932
 933 error:
 934         if (driver)
 935                 gigaset_freedriver(driver);
 936         driver = NULL;
 937         return -1;
 938 }
 939
 940 /*
 941  * This function is called while unloading the kernel-module
 942  */
 943 static void __exit usb_gigaset_exit(void)
 944 {
 945         int i;
 946
 947         gigaset_blockdriver(driver); /* => probe will fail
 948                                       * => no gigaset_start any more
 949                                       */
 950
 951         /* stop all connected devices */
 952         for (i = 0; i < driver->minors; i++)
 953                 gigaset_shutdown(driver->cs + i);
 954
 955         /* from now on, no isdn callback should be possible */
 956
 957         /* deregister this driver with the USB subsystem */
 958         usb_deregister(&gigaset_usb_driver);
 959         /* this will call the disconnect-callback */
 960         /* from now on, no disconnect/probe callback should be running */
 961
 962         gigaset_freedriver(driver);
 963         driver = NULL;
 964 }
 965
 966
 967 module_init(usb_gigaset_init);
 968 module_exit(usb_gigaset_exit);
 969
 970 MODULE_AUTHOR(DRIVER_AUTHOR);
 971 MODULE_DESCRIPTION(DRIVER_DESC);
 972
 973 MODULE_LICENSE("GPL");