git.oblomov.eu Git - 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 //FIXME  // WAKEUP_CHARS: 256
  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 need
 101  *            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 static struct gigaset_driver *driver = NULL;
 113 static struct cardstate *cardstate = NULL;
 114
 115 /* usb specific object needed to register this driver with the usb subsystem */
 116 static struct usb_driver gigaset_usb_driver = {
 117         .name =         GIGASET_MODULENAME,
 118         .probe =        gigaset_probe,
 119         .disconnect =   gigaset_disconnect,
 120         .id_table =     gigaset_table,
 121 };
 122
 123 struct usb_cardstate {
 124         struct usb_device       *udev;          /* usb device pointer */
 125         struct usb_interface    *interface;     /* interface for this device */
 126         atomic_t                busy;           /* bulk output in progress */
 127
 128         /* Output buffer */
 129         unsigned char           *bulk_out_buffer;
 130         int                     bulk_out_size;
 131         __u8                    bulk_out_endpointAddr;
 132         struct urb              *bulk_out_urb;
 133
 134         /* Input buffer */
 135         int                     rcvbuf_size;
 136         struct urb              *read_urb;
 137         __u8                    int_in_endpointAddr;
 138
 139         char                    bchars[6];              /* for request 0x19 */
 140 };
 141
 142 static inline unsigned tiocm_to_gigaset(unsigned state)
 143 {
 144         return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
 145 }
 146
 147 #ifdef CONFIG_GIGASET_UNDOCREQ
 148 /* WARNING: EXPERIMENTAL! */
 149 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
 150                                   unsigned new_state)
 151 {
 152         struct usb_device *udev = cs->hw.usb->udev;
 153         unsigned mask, val;
 154         int r;
 155
 156         mask = tiocm_to_gigaset(old_state ^ new_state);
 157         val = tiocm_to_gigaset(new_state);
 158
 159         gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
 160         // don't use this in an interrupt/BH
 161         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
 162                             (val & 0xff) | ((mask & 0xff) << 8), 0,
 163                             NULL, 0, 2000 /* timeout? */);
 164         if (r < 0)
 165                 return r;
 166         //..
 167         return 0;
 168 }
 169
 170 static int set_value(struct cardstate *cs, u8 req, u16 val)
 171 {
 172         struct usb_device *udev = cs->hw.usb->udev;
 173         int r, r2;
 174
 175         gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
 176                 (unsigned)req, (unsigned)val);
 177         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
 178                             0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
 179                             /* no idea what this does */
 180         if (r < 0) {
 181                 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
 182                 return r;
 183         }
 184
 185         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
 186                             val, 0, NULL, 0, 2000 /*?*/);
 187         if (r < 0)
 188                 dev_err(&udev->dev, "error %d on request 0x%02x\n",
 189                         -r, (unsigned)req);
 190
 191         r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
 192                              0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
 193         if (r2 < 0)
 194                 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
 195
 196         return r < 0 ? r : (r2 < 0 ? r2 : 0);
 197 }
 198
 199 /* WARNING: HIGHLY EXPERIMENTAL! */
 200 // don't use this in an interrupt/BH
 201 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
 202 {
 203         u16 val;
 204         u32 rate;
 205
 206         cflag &= CBAUD;
 207
 208         switch (cflag) {
 209         //FIXME more values?
 210         case    B300: rate =     300; break;
 211         case    B600: rate =     600; break;
 212         case   B1200: rate =    1200; break;
 213         case   B2400: rate =    2400; break;
 214         case   B4800: rate =    4800; break;
 215         case   B9600: rate =    9600; break;
 216         case  B19200: rate =   19200; break;
 217         case  B38400: rate =   38400; break;
 218         case  B57600: rate =   57600; break;
 219         case B115200: rate =  115200; break;
 220         default:
 221                 rate =  9600;
 222                 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
 223                         " using default of B9600\n", cflag);
 224         }
 225
 226         val = 0x383fff / rate + 1;
 227
 228         return set_value(cs, 1, val);
 229 }
 230
 231 /* WARNING: HIGHLY EXPERIMENTAL! */
 232 // don't use this in an interrupt/BH
 233 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
 234 {
 235         u16 val = 0;
 236
 237         /* set the parity */
 238         if (cflag & PARENB)
 239                 val |= (cflag & PARODD) ? 0x10 : 0x20;
 240
 241         /* set the number of data bits */
 242         switch (cflag & CSIZE) {
 243         case CS5:
 244                 val |= 5 << 8; break;
 245         case CS6:
 246                 val |= 6 << 8; break;
 247         case CS7:
 248                 val |= 7 << 8; break;
 249         case CS8:
 250                 val |= 8 << 8; break;
 251         default:
 252                 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
 253                 val |= 8 << 8;
 254                 break;
 255         }
 256
 257         /* set the number of stop bits */
 258         if (cflag & CSTOPB) {
 259                 if ((cflag & CSIZE) == CS5)
 260                         val |= 1; /* 1.5 stop bits */ //FIXME is this okay?
 261                 else
 262                         val |= 2; /* 2 stop bits */
 263         }
 264
 265         return set_value(cs, 3, val);
 266 }
 267
 268 #else
 269 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
 270                                   unsigned new_state)
 271 {
 272         return -EINVAL;
 273 }
 274
 275 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
 276 {
 277         return -EINVAL;
 278 }
 279
 280 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
 281 {
 282         return -EINVAL;
 283 }
 284 #endif
 285
 286
 287  /*================================================================================================================*/
 288 static int gigaset_init_bchannel(struct bc_state *bcs)
 289 {
 290         /* nothing to do for M10x */
 291         gigaset_bchannel_up(bcs);
 292         return 0;
 293 }
 294
 295 static int gigaset_close_bchannel(struct bc_state *bcs)
 296 {
 297         /* nothing to do for M10x */
 298         gigaset_bchannel_down(bcs);
 299         return 0;
 300 }
 301
 302 static int write_modem(struct cardstate *cs);
 303 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
 304
 305
 306 /* Write tasklet handler: Continue sending current skb, or send command, or
 307  * start sending an skb from the send queue.
 308  */
 309 static void gigaset_modem_fill(unsigned long data)
 310 {
 311         struct cardstate *cs = (struct cardstate *) data;
 312         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 313         struct cmdbuf_t *cb;
 314         int again;
 315
 316         gig_dbg(DEBUG_OUTPUT, "modem_fill");
 317
 318         if (atomic_read(&cs->hw.usb->busy)) {
 319                 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
 320                 return;
 321         }
 322
 323         do {
 324                 again = 0;
 325                 if (!bcs->tx_skb) { /* no skb is being sent */
 326                         cb = cs->cmdbuf;
 327                         if (cb) { /* commands to send? */
 328                                 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
 329                                 if (send_cb(cs, cb) < 0) {
 330                                         gig_dbg(DEBUG_OUTPUT,
 331                                                 "modem_fill: send_cb failed");
 332                                         again = 1; /* no callback will be
 333                                                       called! */
 334                                 }
 335                         } else { /* skbs to send? */
 336                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
 337                                 if (bcs->tx_skb)
 338                                         gig_dbg(DEBUG_INTR,
 339                                                 "Dequeued skb (Adr: %lx)!",
 340                                                 (unsigned long) bcs->tx_skb);
 341                         }
 342                 }
 343
 344                 if (bcs->tx_skb) {
 345                         gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
 346                         if (write_modem(cs) < 0) {
 347                                 gig_dbg(DEBUG_OUTPUT,
 348                                         "modem_fill: write_modem failed");
 349                                 // FIXME should we tell the LL?
 350                                 again = 1; /* no callback will be called! */
 351                         }
 352                 }
 353         } while (again);
 354 }
 355
 356 /**
 357  *      gigaset_read_int_callback
 358  *
 359  *      It is called if the data was received from the device.
 360  */
 361 static void gigaset_read_int_callback(struct urb *urb)
 362 {
 363         struct inbuf_t *inbuf = urb->context;
 364         struct cardstate *cs = inbuf->cs;
 365         int status = urb->status;
 366         int r;
 367         unsigned numbytes;
 368         unsigned char *src;
 369         unsigned long flags;
 370
 371         if (!status) {
 372                 numbytes = urb->actual_length;
 373
 374                 if (numbytes) {
 375                         src = inbuf->rcvbuf;
 376                         if (unlikely(*src))
 377                                 dev_warn(cs->dev,
 378                                     "%s: There was no leading 0, but 0x%02x!\n",
 379                                          __func__, (unsigned) *src);
 380                         ++src; /* skip leading 0x00 */
 381                         --numbytes;
 382                         if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
 383                                 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
 384                                 gigaset_schedule_event(inbuf->cs);
 385                         }
 386                 } else
 387                         gig_dbg(DEBUG_INTR, "Received zero block length");
 388         } else {
 389                 /* The urb might have been killed. */
 390                 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
 391                         __func__, status);
 392                 if (status == -ENOENT || status == -ESHUTDOWN)
 393                         /* killed or endpoint shutdown: don't resubmit */
 394                         return;
 395         }
 396
 397         /* resubmit URB */
 398         spin_lock_irqsave(&cs->lock, flags);
 399         if (!cs->connected) {
 400                 spin_unlock_irqrestore(&cs->lock, flags);
 401                 err("%s: disconnected", __func__);
 402                 return;
 403         }
 404         r = usb_submit_urb(urb, GFP_ATOMIC);
 405         spin_unlock_irqrestore(&cs->lock, flags);
 406         if (r)
 407                 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
 408 }
 409
 410
 411 /* This callback routine is called when data was transmitted to the device. */
 412 static void gigaset_write_bulk_callback(struct urb *urb)
 413 {
 414         struct cardstate *cs = urb->context;
 415         int status = urb->status;
 416         unsigned long flags;
 417
 418         switch (status) {
 419         case 0:                 /* normal completion */
 420                 break;
 421         case -ENOENT:           /* killed */
 422                 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
 423                 atomic_set(&cs->hw.usb->busy, 0);
 424                 return;
 425         default:
 426                 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
 427                         -status);
 428                 /* That's all we can do. Communication problems
 429                    are handled by timeouts or network protocols. */
 430         }
 431
 432         spin_lock_irqsave(&cs->lock, flags);
 433         if (!cs->connected) {
 434                 err("%s: not connected", __func__);
 435         } else {
 436                 atomic_set(&cs->hw.usb->busy, 0);
 437                 tasklet_schedule(&cs->write_tasklet);
 438         }
 439         spin_unlock_irqrestore(&cs->lock, flags);
 440 }
 441
 442 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
 443 {
 444         struct cmdbuf_t *tcb;
 445         unsigned long flags;
 446         int count;
 447         int status = -ENOENT; // FIXME
 448         struct usb_cardstate *ucs = cs->hw.usb;
 449
 450         do {
 451                 if (!cb->len) {
 452                         tcb = cb;
 453
 454                         spin_lock_irqsave(&cs->cmdlock, flags);
 455                         cs->cmdbytes -= cs->curlen;
 456                         gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
 457                                 cs->curlen, cs->cmdbytes);
 458                         cs->cmdbuf = cb = cb->next;
 459                         if (cb) {
 460                                 cb->prev = NULL;
 461                                 cs->curlen = cb->len;
 462                         } else {
 463                                 cs->lastcmdbuf = NULL;
 464                                 cs->curlen = 0;
 465                         }
 466                         spin_unlock_irqrestore(&cs->cmdlock, flags);
 467
 468                         if (tcb->wake_tasklet)
 469                                 tasklet_schedule(tcb->wake_tasklet);
 470                         kfree(tcb);
 471                 }
 472                 if (cb) {
 473                         count = min(cb->len, ucs->bulk_out_size);
 474                         gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
 475
 476                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 477                                           usb_sndbulkpipe(ucs->udev,
 478                                              ucs->bulk_out_endpointAddr & 0x0f),
 479                                           cb->buf + cb->offset, count,
 480                                           gigaset_write_bulk_callback, cs);
 481
 482                         cb->offset += count;
 483                         cb->len -= count;
 484                         atomic_set(&ucs->busy, 1);
 485
 486                         spin_lock_irqsave(&cs->lock, flags);
 487                         status = cs->connected ? usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) : -ENODEV;
 488                         spin_unlock_irqrestore(&cs->lock, flags);
 489
 490                         if (status) {
 491                                 atomic_set(&ucs->busy, 0);
 492                                 err("could not submit urb (error %d)\n",
 493                                     -status);
 494                                 cb->len = 0; /* skip urb => remove cb+wakeup
 495                                                 in next loop cycle */
 496                         }
 497                 }
 498         } while (cb && status); /* next command on error */
 499
 500         return status;
 501 }
 502
 503 /* Send command to device. */
 504 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
 505                              int len, struct tasklet_struct *wake_tasklet)
 506 {
 507         struct cmdbuf_t *cb;
 508         unsigned long flags;
 509
 510         gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ?
 511                              DEBUG_TRANSCMD : DEBUG_LOCKCMD,
 512                            "CMD Transmit", len, buf);
 513
 514         if (len <= 0)
 515                 return 0;
 516
 517         if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
 518                 dev_err(cs->dev, "%s: out of memory\n", __func__);
 519                 return -ENOMEM;
 520         }
 521
 522         memcpy(cb->buf, buf, len);
 523         cb->len = len;
 524         cb->offset = 0;
 525         cb->next = NULL;
 526         cb->wake_tasklet = wake_tasklet;
 527
 528         spin_lock_irqsave(&cs->cmdlock, flags);
 529         cb->prev = cs->lastcmdbuf;
 530         if (cs->lastcmdbuf)
 531                 cs->lastcmdbuf->next = cb;
 532         else {
 533                 cs->cmdbuf = cb;
 534                 cs->curlen = len;
 535         }
 536         cs->cmdbytes += len;
 537         cs->lastcmdbuf = cb;
 538         spin_unlock_irqrestore(&cs->cmdlock, flags);
 539
 540         spin_lock_irqsave(&cs->lock, flags);
 541         if (cs->connected)
 542                 tasklet_schedule(&cs->write_tasklet);
 543         spin_unlock_irqrestore(&cs->lock, flags);
 544         return len;
 545 }
 546
 547 static int gigaset_write_room(struct cardstate *cs)
 548 {
 549         unsigned bytes;
 550
 551         bytes = cs->cmdbytes;
 552         return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
 553 }
 554
 555 static int gigaset_chars_in_buffer(struct cardstate *cs)
 556 {
 557         return cs->cmdbytes;
 558 }
 559
 560 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
 561 {
 562 #ifdef CONFIG_GIGASET_UNDOCREQ
 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 #else
 570         return -EINVAL;
 571 #endif
 572 }
 573
 574 static int gigaset_freebcshw(struct bc_state *bcs)
 575 {
 576         /* unused */
 577         return 1;
 578 }
 579
 580 /* Initialize the b-channel structure */
 581 static int gigaset_initbcshw(struct bc_state *bcs)
 582 {
 583         /* unused */
 584         bcs->hw.usb = NULL;
 585         return 1;
 586 }
 587
 588 static void gigaset_reinitbcshw(struct bc_state *bcs)
 589 {
 590         /* nothing to do for M10x */
 591 }
 592
 593 static void gigaset_freecshw(struct cardstate *cs)
 594 {
 595         tasklet_kill(&cs->write_tasklet);
 596         kfree(cs->hw.usb);
 597 }
 598
 599 static int gigaset_initcshw(struct cardstate *cs)
 600 {
 601         struct usb_cardstate *ucs;
 602
 603         cs->hw.usb = ucs =
 604                 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
 605         if (!ucs)
 606                 return 0;
 607
 608         ucs->bchars[0] = 0;
 609         ucs->bchars[1] = 0;
 610         ucs->bchars[2] = 0;
 611         ucs->bchars[3] = 0;
 612         ucs->bchars[4] = 0x11;
 613         ucs->bchars[5] = 0x13;
 614         ucs->bulk_out_buffer = NULL;
 615         ucs->bulk_out_urb = NULL;
 616         //ucs->urb_cmd_out = NULL;
 617         ucs->read_urb = NULL;
 618         tasklet_init(&cs->write_tasklet,
 619                      &gigaset_modem_fill, (unsigned long) cs);
 620
 621         return 1;
 622 }
 623
 624 /* Send data from current skb to the device. */
 625 static int write_modem(struct cardstate *cs)
 626 {
 627         int ret = 0;
 628         int count;
 629         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 630         struct usb_cardstate *ucs = cs->hw.usb;
 631         unsigned long flags;
 632
 633         gig_dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
 634
 635         if (!bcs->tx_skb->len) {
 636                 dev_kfree_skb_any(bcs->tx_skb);
 637                 bcs->tx_skb = NULL;
 638                 return -EINVAL;
 639         }
 640
 641         /* Copy data to bulk out buffer and  // FIXME copying not necessary
 642          * transmit data
 643          */
 644         count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
 645         skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
 646         skb_pull(bcs->tx_skb, count);
 647         atomic_set(&ucs->busy, 1);
 648         gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
 649
 650         spin_lock_irqsave(&cs->lock, flags);
 651         if (cs->connected) {
 652                 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 653                                   usb_sndbulkpipe(ucs->udev,
 654                                                   ucs->bulk_out_endpointAddr & 0x0f),
 655                                   ucs->bulk_out_buffer, count,
 656                                   gigaset_write_bulk_callback, cs);
 657                 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
 658         } else {
 659                 ret = -ENODEV;
 660         }
 661         spin_unlock_irqrestore(&cs->lock, flags);
 662
 663         if (ret) {
 664                 err("could not submit urb (error %d)\n", -ret);
 665                 atomic_set(&ucs->busy, 0);
 666         }
 667
 668         if (!bcs->tx_skb->len) {
 669                 /* skb sent completely */
 670                 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
 671
 672                 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
 673                         (unsigned long) bcs->tx_skb);
 674                 dev_kfree_skb_any(bcs->tx_skb);
 675                 bcs->tx_skb = NULL;
 676         }
 677
 678         return ret;
 679 }
 680
 681 static int gigaset_probe(struct usb_interface *interface,
 682                          const struct usb_device_id *id)
 683 {
 684         int retval;
 685         struct usb_device *udev = interface_to_usbdev(interface);
 686         struct usb_host_interface *hostif = interface->cur_altsetting;
 687         struct cardstate *cs = NULL;
 688         struct usb_cardstate *ucs = NULL;
 689         struct usb_endpoint_descriptor *endpoint;
 690         int buffer_size;
 691
 692         gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
 693
 694         /* See if the device offered us matches what we can accept */
 695         if ((le16_to_cpu(udev->descriptor.idVendor)  != USB_M105_VENDOR_ID) ||
 696             (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
 697                 gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
 698                         le16_to_cpu(udev->descriptor.idVendor),
 699                         le16_to_cpu(udev->descriptor.idProduct));
 700                 return -ENODEV;
 701         }
 702         if (hostif->desc.bInterfaceNumber != 0) {
 703                 gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
 704                         hostif->desc.bInterfaceNumber);
 705                 return -ENODEV;
 706         }
 707         if (hostif->desc.bAlternateSetting != 0) {
 708                 dev_notice(&udev->dev, "unsupported altsetting %d - skip",
 709                            hostif->desc.bAlternateSetting);
 710                 return -ENODEV;
 711         }
 712         if (hostif->desc.bInterfaceClass != 255) {
 713                 dev_notice(&udev->dev, "unsupported interface class %d - skip",
 714                            hostif->desc.bInterfaceClass);
 715                 return -ENODEV;
 716         }
 717
 718         dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
 719
 720         cs = gigaset_getunassignedcs(driver);
 721         if (!cs) {
 722                 dev_warn(&udev->dev, "no free cardstate\n");
 723                 return -ENODEV;
 724         }
 725         ucs = cs->hw.usb;
 726
 727         /* save off device structure ptrs for later use */
 728         usb_get_dev(udev);
 729         ucs->udev = udev;
 730         ucs->interface = interface;
 731         cs->dev = &interface->dev;
 732
 733         /* save address of controller structure */
 734         usb_set_intfdata(interface, cs); // dev_set_drvdata(&interface->dev, cs);
 735
 736         endpoint = &hostif->endpoint[0].desc;
 737
 738         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 739         ucs->bulk_out_size = buffer_size;
 740         ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
 741         ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
 742         if (!ucs->bulk_out_buffer) {
 743                 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
 744                 retval = -ENOMEM;
 745                 goto error;
 746         }
 747
 748         ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
 749         if (!ucs->bulk_out_urb) {
 750                 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
 751                 retval = -ENOMEM;
 752                 goto error;
 753         }
 754
 755         endpoint = &hostif->endpoint[1].desc;
 756
 757         atomic_set(&ucs->busy, 0);
 758
 759         ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
 760         if (!ucs->read_urb) {
 761                 dev_err(cs->dev, "No free urbs available\n");
 762                 retval = -ENOMEM;
 763                 goto error;
 764         }
 765         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 766         ucs->rcvbuf_size = buffer_size;
 767         ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
 768         cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
 769         if (!cs->inbuf[0].rcvbuf) {
 770                 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
 771                 retval = -ENOMEM;
 772                 goto error;
 773         }
 774         /* Fill the interrupt urb and send it to the core */
 775         usb_fill_int_urb(ucs->read_urb, udev,
 776                          usb_rcvintpipe(udev,
 777                                         endpoint->bEndpointAddress & 0x0f),
 778                          cs->inbuf[0].rcvbuf, buffer_size,
 779                          gigaset_read_int_callback,
 780                          cs->inbuf + 0, endpoint->bInterval);
 781
 782         retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
 783         if (retval) {
 784                 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
 785                 goto error;
 786         }
 787
 788         /* tell common part that the device is ready */
 789         if (startmode == SM_LOCKED)
 790                 atomic_set(&cs->mstate, MS_LOCKED);
 791
 792         if (!gigaset_start(cs)) {
 793                 tasklet_kill(&cs->write_tasklet);
 794                 retval = -ENODEV; //FIXME
 795                 goto error;
 796         }
 797         return 0;
 798
 799 error:
 800         usb_kill_urb(ucs->read_urb);
 801         kfree(ucs->bulk_out_buffer);
 802         usb_free_urb(ucs->bulk_out_urb);
 803         kfree(cs->inbuf[0].rcvbuf);
 804         usb_free_urb(ucs->read_urb);
 805         usb_set_intfdata(interface, NULL);
 806         ucs->read_urb = ucs->bulk_out_urb = NULL;
 807         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
 808         usb_put_dev(ucs->udev);
 809         ucs->udev = NULL;
 810         ucs->interface = NULL;
 811         gigaset_unassign(cs);
 812         return retval;
 813 }
 814
 815 static void gigaset_disconnect(struct usb_interface *interface)
 816 {
 817         struct cardstate *cs;
 818         struct usb_cardstate *ucs;
 819
 820         cs = usb_get_intfdata(interface);
 821         ucs = cs->hw.usb;
 822
 823         dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
 824
 825         usb_kill_urb(ucs->read_urb);
 826
 827         gigaset_stop(cs);
 828
 829         usb_set_intfdata(interface, NULL);
 830         tasklet_kill(&cs->write_tasklet);
 831
 832         usb_kill_urb(ucs->bulk_out_urb);
 833
 834         kfree(ucs->bulk_out_buffer);
 835         usb_free_urb(ucs->bulk_out_urb);
 836         kfree(cs->inbuf[0].rcvbuf);
 837         usb_free_urb(ucs->read_urb);
 838         ucs->read_urb = ucs->bulk_out_urb = NULL;
 839         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
 840
 841         usb_put_dev(ucs->udev);
 842         ucs->interface = NULL;
 843         ucs->udev = NULL;
 844         cs->dev = NULL;
 845         gigaset_unassign(cs);
 846 }
 847
 848 static const struct gigaset_ops ops = {
 849         gigaset_write_cmd,
 850         gigaset_write_room,
 851         gigaset_chars_in_buffer,
 852         gigaset_brkchars,
 853         gigaset_init_bchannel,
 854         gigaset_close_bchannel,
 855         gigaset_initbcshw,
 856         gigaset_freebcshw,
 857         gigaset_reinitbcshw,
 858         gigaset_initcshw,
 859         gigaset_freecshw,
 860         gigaset_set_modem_ctrl,
 861         gigaset_baud_rate,
 862         gigaset_set_line_ctrl,
 863         gigaset_m10x_send_skb,
 864         gigaset_m10x_input,
 865 };
 866
 867 /**
 868  *      usb_gigaset_init
 869  * This function is called while kernel-module is loaded
 870  */
 871 static int __init usb_gigaset_init(void)
 872 {
 873         int result;
 874
 875         /* allocate memory for our driver state and intialize it */
 876         if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
 877                                        GIGASET_MODULENAME, GIGASET_DEVNAME,
 878                                        &ops, THIS_MODULE)) == NULL)
 879                 goto error;
 880
 881         /* allocate memory for our device state and intialize it */
 882         cardstate = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
 883         if (!cardstate)
 884                 goto error;
 885
 886         /* register this driver with the USB subsystem */
 887         result = usb_register(&gigaset_usb_driver);
 888         if (result < 0) {
 889                 err("usb_gigaset: usb_register failed (error %d)",
 890                     -result);
 891                 goto error;
 892         }
 893
 894         info(DRIVER_AUTHOR);
 895         info(DRIVER_DESC);
 896         return 0;
 897
 898 error:  if (cardstate)
 899                 gigaset_freecs(cardstate);
 900         cardstate = NULL;
 901         if (driver)
 902                 gigaset_freedriver(driver);
 903         driver = NULL;
 904         return -1;
 905 }
 906
 907
 908 /**
 909  *      usb_gigaset_exit
 910  * This function is called while unloading the kernel-module
 911  */
 912 static void __exit usb_gigaset_exit(void)
 913 {
 914         gigaset_blockdriver(driver); /* => probe will fail
 915                                       * => no gigaset_start any more
 916                                       */
 917
 918         gigaset_shutdown(cardstate);
 919         /* from now on, no isdn callback should be possible */
 920
 921         /* deregister this driver with the USB subsystem */
 922         usb_deregister(&gigaset_usb_driver);
 923         /* this will call the disconnect-callback */
 924         /* from now on, no disconnect/probe callback should be running */
 925
 926         gigaset_freecs(cardstate);
 927         cardstate = NULL;
 928         gigaset_freedriver(driver);
 929         driver = NULL;
 930 }
 931
 932
 933 module_init(usb_gigaset_init);
 934 module_exit(usb_gigaset_exit);
 935
 936 MODULE_AUTHOR(DRIVER_AUTHOR);
 937 MODULE_DESCRIPTION(DRIVER_DESC);
 938
 939 MODULE_LICENSE("GPL");