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 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 static int gigaset_probe(struct usb_interface *interface,
 108                          const struct usb_device_id *id);
 109 static void gigaset_disconnect(struct usb_interface *interface);
 110
 111 static struct gigaset_driver *driver = NULL;
 112 static struct cardstate *cardstate = NULL;
 113
 114 /* usb specific object needed to register this driver with the usb subsystem */
 115 static struct usb_driver gigaset_usb_driver = {
 116         .name =         GIGASET_MODULENAME,
 117         .probe =        gigaset_probe,
 118         .disconnect =   gigaset_disconnect,
 119         .id_table =     gigaset_table,
 120 };
 121
 122 struct usb_cardstate {
 123         struct usb_device       *udev;          /* usb device pointer */
 124         struct usb_interface    *interface;     /* interface for this device */
 125         atomic_t                busy;           /* bulk output in progress */
 126
 127         /* Output buffer */
 128         unsigned char           *bulk_out_buffer;
 129         int                     bulk_out_size;
 130         __u8                    bulk_out_endpointAddr;
 131         struct urb              *bulk_out_urb;
 132
 133         /* Input buffer */
 134         int                     rcvbuf_size;
 135         struct urb              *read_urb;
 136         __u8                    int_in_endpointAddr;
 137
 138         char                    bchars[6];              /* for request 0x19 */
 139 };
 140
 141 struct usb_bc_state {};
 142
 143 static inline unsigned tiocm_to_gigaset(unsigned state)
 144 {
 145         return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
 146 }
 147
 148 #ifdef CONFIG_GIGASET_UNDOCREQ
 149 /* WARNING: EXPERIMENTAL! */
 150 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
 151                                   unsigned new_state)
 152 {
 153         struct usb_device *udev = cs->hw.usb->udev;
 154         unsigned mask, val;
 155         int r;
 156
 157         mask = tiocm_to_gigaset(old_state ^ new_state);
 158         val = tiocm_to_gigaset(new_state);
 159
 160         gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
 161         // don't use this in an interrupt/BH
 162         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
 163                             (val & 0xff) | ((mask & 0xff) << 8), 0,
 164                             NULL, 0, 2000 /* timeout? */);
 165         if (r < 0)
 166                 return r;
 167         //..
 168         return 0;
 169 }
 170
 171 static int set_value(struct cardstate *cs, u8 req, u16 val)
 172 {
 173         struct usb_device *udev = cs->hw.usb->udev;
 174         int r, r2;
 175
 176         gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
 177                 (unsigned)req, (unsigned)val);
 178         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
 179                             0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
 180                             /* no idea what this does */
 181         if (r < 0) {
 182                 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
 183                 return r;
 184         }
 185
 186         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
 187                             val, 0, NULL, 0, 2000 /*?*/);
 188         if (r < 0)
 189                 dev_err(&udev->dev, "error %d on request 0x%02x\n",
 190                         -r, (unsigned)req);
 191
 192         r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
 193                              0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
 194         if (r2 < 0)
 195                 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
 196
 197         return r < 0 ? r : (r2 < 0 ? r2 : 0);
 198 }
 199
 200 /* WARNING: HIGHLY EXPERIMENTAL! */
 201 // don't use this in an interrupt/BH
 202 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
 203 {
 204         u16 val;
 205         u32 rate;
 206
 207         cflag &= CBAUD;
 208
 209         switch (cflag) {
 210         //FIXME more values?
 211         case    B300: rate =     300; break;
 212         case    B600: rate =     600; break;
 213         case   B1200: rate =    1200; break;
 214         case   B2400: rate =    2400; break;
 215         case   B4800: rate =    4800; break;
 216         case   B9600: rate =    9600; break;
 217         case  B19200: rate =   19200; break;
 218         case  B38400: rate =   38400; break;
 219         case  B57600: rate =   57600; break;
 220         case B115200: rate =  115200; break;
 221         default:
 222                 rate =  9600;
 223                 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
 224                         " using default of B9600\n", cflag);
 225         }
 226
 227         val = 0x383fff / rate + 1;
 228
 229         return set_value(cs, 1, val);
 230 }
 231
 232 /* WARNING: HIGHLY EXPERIMENTAL! */
 233 // don't use this in an interrupt/BH
 234 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
 235 {
 236         u16 val = 0;
 237
 238         /* set the parity */
 239         if (cflag & PARENB)
 240                 val |= (cflag & PARODD) ? 0x10 : 0x20;
 241
 242         /* set the number of data bits */
 243         switch (cflag & CSIZE) {
 244         case CS5:
 245                 val |= 5 << 8; break;
 246         case CS6:
 247                 val |= 6 << 8; break;
 248         case CS7:
 249                 val |= 7 << 8; break;
 250         case CS8:
 251                 val |= 8 << 8; break;
 252         default:
 253                 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
 254                 val |= 8 << 8;
 255                 break;
 256         }
 257
 258         /* set the number of stop bits */
 259         if (cflag & CSTOPB) {
 260                 if ((cflag & CSIZE) == CS5)
 261                         val |= 1; /* 1.5 stop bits */ //FIXME is this okay?
 262                 else
 263                         val |= 2; /* 2 stop bits */
 264         }
 265
 266         return set_value(cs, 3, val);
 267 }
 268
 269 #else
 270 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
 271                                   unsigned new_state)
 272 {
 273         return -EINVAL;
 274 }
 275
 276 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
 277 {
 278         return -EINVAL;
 279 }
 280
 281 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
 282 {
 283         return -EINVAL;
 284 }
 285 #endif
 286
 287
 288  /*================================================================================================================*/
 289 static int gigaset_init_bchannel(struct bc_state *bcs)
 290 {
 291         /* nothing to do for M10x */
 292         gigaset_bchannel_up(bcs);
 293         return 0;
 294 }
 295
 296 static int gigaset_close_bchannel(struct bc_state *bcs)
 297 {
 298         /* nothing to do for M10x */
 299         gigaset_bchannel_down(bcs);
 300         return 0;
 301 }
 302
 303 static int write_modem(struct cardstate *cs);
 304 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
 305
 306
 307 /* Write tasklet handler: Continue sending current skb, or send command, or
 308  * start sending an skb from the send queue.
 309  */
 310 static void gigaset_modem_fill(unsigned long data)
 311 {
 312         struct cardstate *cs = (struct cardstate *) data;
 313         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 314         struct cmdbuf_t *cb;
 315         unsigned long flags;
 316         int again;
 317
 318         gig_dbg(DEBUG_OUTPUT, "modem_fill");
 319
 320         if (atomic_read(&cs->hw.usb->busy)) {
 321                 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
 322                 return;
 323         }
 324
 325         do {
 326                 again = 0;
 327                 if (!bcs->tx_skb) { /* no skb is being sent */
 328                         spin_lock_irqsave(&cs->cmdlock, flags);
 329                         cb = cs->cmdbuf;
 330                         spin_unlock_irqrestore(&cs->cmdlock, flags);
 331                         if (cb) { /* commands to send? */
 332                                 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
 333                                 if (send_cb(cs, cb) < 0) {
 334                                         gig_dbg(DEBUG_OUTPUT,
 335                                                 "modem_fill: send_cb failed");
 336                                         again = 1; /* no callback will be
 337                                                       called! */
 338                                 }
 339                         } else { /* skbs to send? */
 340                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
 341                                 if (bcs->tx_skb)
 342                                         gig_dbg(DEBUG_INTR,
 343                                                 "Dequeued skb (Adr: %lx)!",
 344                                                 (unsigned long) bcs->tx_skb);
 345                         }
 346                 }
 347
 348                 if (bcs->tx_skb) {
 349                         gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
 350                         if (write_modem(cs) < 0) {
 351                                 gig_dbg(DEBUG_OUTPUT,
 352                                         "modem_fill: write_modem failed");
 353                                 // FIXME should we tell the LL?
 354                                 again = 1; /* no callback will be called! */
 355                         }
 356                 }
 357         } while (again);
 358 }
 359
 360 /**
 361  *      gigaset_read_int_callback
 362  *
 363  *      It is called if the data was received from the device.
 364  */
 365 static void gigaset_read_int_callback(struct urb *urb)
 366 {
 367         struct inbuf_t *inbuf = urb->context;
 368         struct cardstate *cs = inbuf->cs;
 369         int resubmit = 0;
 370         int r;
 371         unsigned numbytes;
 372         unsigned char *src;
 373         unsigned long flags;
 374
 375         if (!urb->status) {
 376                 if (!cs->connected) {
 377                         err("%s: disconnected", __func__); /* should never happen */
 378                         return;
 379                 }
 380
 381                 numbytes = urb->actual_length;
 382
 383                 if (numbytes) {
 384                         src = inbuf->rcvbuf;
 385                         if (unlikely(*src))
 386                                 dev_warn(cs->dev,
 387                                     "%s: There was no leading 0, but 0x%02x!\n",
 388                                          __func__, (unsigned) *src);
 389                         ++src; /* skip leading 0x00 */
 390                         --numbytes;
 391                         if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
 392                                 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
 393                                 gigaset_schedule_event(inbuf->cs);
 394                         }
 395                 } else
 396                         gig_dbg(DEBUG_INTR, "Received zero block length");
 397                 resubmit = 1;
 398         } else {
 399                 /* The urb might have been killed. */
 400                 gig_dbg(DEBUG_ANY, "%s - nonzero read bulk status received: %d",
 401                         __func__, urb->status);
 402                 if (urb->status != -ENOENT) { /* not killed */
 403                         if (!cs->connected) {
 404                                 err("%s: disconnected", __func__); /* should never happen */
 405                                 return;
 406                         }
 407                         resubmit = 1;
 408                 }
 409         }
 410
 411         if (resubmit) {
 412                 spin_lock_irqsave(&cs->lock, flags);
 413                 r = cs->connected ? usb_submit_urb(urb, SLAB_ATOMIC) : -ENODEV;
 414                 spin_unlock_irqrestore(&cs->lock, flags);
 415                 if (r)
 416                         dev_err(cs->dev, "error %d when resubmitting urb.\n",
 417                                 -r);
 418         }
 419 }
 420
 421
 422 /* This callback routine is called when data was transmitted to the device. */
 423 static void gigaset_write_bulk_callback(struct urb *urb)
 424 {
 425         struct cardstate *cs = urb->context;
 426         unsigned long flags;
 427
 428         if (urb->status)
 429                 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
 430                         -urb->status);
 431                 /* That's all we can do. Communication problems
 432                    are handled by timeouts or network protocols. */
 433
 434         spin_lock_irqsave(&cs->lock, flags);
 435         if (!cs->connected) {
 436                 err("%s: not connected", __func__);
 437         } else {
 438                 atomic_set(&cs->hw.usb->busy, 0);
 439                 tasklet_schedule(&cs->write_tasklet);
 440         }
 441         spin_unlock_irqrestore(&cs->lock, flags);
 442 }
 443
 444 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
 445 {
 446         struct cmdbuf_t *tcb;
 447         unsigned long flags;
 448         int count;
 449         int status = -ENOENT; // FIXME
 450         struct usb_cardstate *ucs = cs->hw.usb;
 451
 452         do {
 453                 if (!cb->len) {
 454                         tcb = cb;
 455
 456                         spin_lock_irqsave(&cs->cmdlock, flags);
 457                         cs->cmdbytes -= cs->curlen;
 458                         gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
 459                                 cs->curlen, cs->cmdbytes);
 460                         cs->cmdbuf = cb = cb->next;
 461                         if (cb) {
 462                                 cb->prev = NULL;
 463                                 cs->curlen = cb->len;
 464                         } else {
 465                                 cs->lastcmdbuf = NULL;
 466                                 cs->curlen = 0;
 467                         }
 468                         spin_unlock_irqrestore(&cs->cmdlock, flags);
 469
 470                         if (tcb->wake_tasklet)
 471                                 tasklet_schedule(tcb->wake_tasklet);
 472                         kfree(tcb);
 473                 }
 474                 if (cb) {
 475                         count = min(cb->len, ucs->bulk_out_size);
 476                         gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
 477
 478                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 479                                           usb_sndbulkpipe(ucs->udev,
 480                                              ucs->bulk_out_endpointAddr & 0x0f),
 481                                           cb->buf + cb->offset, count,
 482                                           gigaset_write_bulk_callback, cs);
 483
 484                         cb->offset += count;
 485                         cb->len -= count;
 486                         atomic_set(&ucs->busy, 1);
 487
 488                         spin_lock_irqsave(&cs->lock, flags);
 489                         status = cs->connected ? usb_submit_urb(ucs->bulk_out_urb, SLAB_ATOMIC) : -ENODEV;
 490                         spin_unlock_irqrestore(&cs->lock, flags);
 491
 492                         if (status) {
 493                                 atomic_set(&ucs->busy, 0);
 494                                 err("could not submit urb (error %d)\n",
 495                                     -status);
 496                                 cb->len = 0; /* skip urb => remove cb+wakeup
 497                                                 in next loop cycle */
 498                         }
 499                 }
 500         } while (cb && status); /* next command on error */
 501
 502         return status;
 503 }
 504
 505 /* Send command to device. */
 506 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
 507                              int len, struct tasklet_struct *wake_tasklet)
 508 {
 509         struct cmdbuf_t *cb;
 510         unsigned long flags;
 511
 512         gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ?
 513                              DEBUG_TRANSCMD : DEBUG_LOCKCMD,
 514                            "CMD Transmit", len, buf);
 515
 516         if (len <= 0)
 517                 return 0;
 518
 519         if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
 520                 dev_err(cs->dev, "%s: out of memory\n", __func__);
 521                 return -ENOMEM;
 522         }
 523
 524         memcpy(cb->buf, buf, len);
 525         cb->len = len;
 526         cb->offset = 0;
 527         cb->next = NULL;
 528         cb->wake_tasklet = wake_tasklet;
 529
 530         spin_lock_irqsave(&cs->cmdlock, flags);
 531         cb->prev = cs->lastcmdbuf;
 532         if (cs->lastcmdbuf)
 533                 cs->lastcmdbuf->next = cb;
 534         else {
 535                 cs->cmdbuf = cb;
 536                 cs->curlen = len;
 537         }
 538         cs->cmdbytes += len;
 539         cs->lastcmdbuf = cb;
 540         spin_unlock_irqrestore(&cs->cmdlock, flags);
 541
 542         spin_lock_irqsave(&cs->lock, flags);
 543         if (cs->connected)
 544                 tasklet_schedule(&cs->write_tasklet);
 545         spin_unlock_irqrestore(&cs->lock, flags);
 546         return len;
 547 }
 548
 549 static int gigaset_write_room(struct cardstate *cs)
 550 {
 551         unsigned long flags;
 552         unsigned bytes;
 553
 554         spin_lock_irqsave(&cs->cmdlock, flags);
 555         bytes = cs->cmdbytes;
 556         spin_unlock_irqrestore(&cs->cmdlock, flags);
 557
 558         return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
 559 }
 560
 561 static int gigaset_chars_in_buffer(struct cardstate *cs)
 562 {
 563         return cs->cmdbytes;
 564 }
 565
 566 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
 567 {
 568 #ifdef CONFIG_GIGASET_UNDOCREQ
 569         struct usb_device *udev = cs->hw.usb->udev;
 570
 571         gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
 572         memcpy(cs->hw.usb->bchars, buf, 6);
 573         return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
 574                                0, 0, &buf, 6, 2000);
 575 #else
 576         return -EINVAL;
 577 #endif
 578 }
 579
 580 static int gigaset_freebcshw(struct bc_state *bcs)
 581 {
 582         if (!bcs->hw.usb)
 583                 return 0;
 584         //FIXME
 585         kfree(bcs->hw.usb);
 586         return 1;
 587 }
 588
 589 /* Initialize the b-channel structure */
 590 static int gigaset_initbcshw(struct bc_state *bcs)
 591 {
 592         bcs->hw.usb = kmalloc(sizeof(struct usb_bc_state), GFP_KERNEL);
 593         if (!bcs->hw.usb)
 594                 return 0;
 595
 596         return 1;
 597 }
 598
 599 static void gigaset_reinitbcshw(struct bc_state *bcs)
 600 {
 601 }
 602
 603 static void gigaset_freecshw(struct cardstate *cs)
 604 {
 605         tasklet_kill(&cs->write_tasklet);
 606         kfree(cs->hw.usb);
 607 }
 608
 609 static int gigaset_initcshw(struct cardstate *cs)
 610 {
 611         struct usb_cardstate *ucs;
 612
 613         cs->hw.usb = ucs =
 614                 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
 615         if (!ucs)
 616                 return 0;
 617
 618         ucs->bchars[0] = 0;
 619         ucs->bchars[1] = 0;
 620         ucs->bchars[2] = 0;
 621         ucs->bchars[3] = 0;
 622         ucs->bchars[4] = 0x11;
 623         ucs->bchars[5] = 0x13;
 624         ucs->bulk_out_buffer = NULL;
 625         ucs->bulk_out_urb = NULL;
 626         //ucs->urb_cmd_out = NULL;
 627         ucs->read_urb = NULL;
 628         tasklet_init(&cs->write_tasklet,
 629                      &gigaset_modem_fill, (unsigned long) cs);
 630
 631         return 1;
 632 }
 633
 634 /* Send data from current skb to the device. */
 635 static int write_modem(struct cardstate *cs)
 636 {
 637         int ret = 0;
 638         int count;
 639         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 640         struct usb_cardstate *ucs = cs->hw.usb;
 641         unsigned long flags;
 642
 643         gig_dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
 644
 645         if (!bcs->tx_skb->len) {
 646                 dev_kfree_skb_any(bcs->tx_skb);
 647                 bcs->tx_skb = NULL;
 648                 return -EINVAL;
 649         }
 650
 651         /* Copy data to bulk out buffer and  // FIXME copying not necessary
 652          * transmit data
 653          */
 654         count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
 655         memcpy(ucs->bulk_out_buffer, bcs->tx_skb->data, count);
 656         skb_pull(bcs->tx_skb, count);
 657         atomic_set(&ucs->busy, 1);
 658         gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
 659
 660         spin_lock_irqsave(&cs->lock, flags);
 661         if (cs->connected) {
 662                 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 663                                   usb_sndbulkpipe(ucs->udev,
 664                                                   ucs->bulk_out_endpointAddr & 0x0f),
 665                                   ucs->bulk_out_buffer, count,
 666                                   gigaset_write_bulk_callback, cs);
 667                 ret = usb_submit_urb(ucs->bulk_out_urb, SLAB_ATOMIC);
 668         } else {
 669                 ret = -ENODEV;
 670         }
 671         spin_unlock_irqrestore(&cs->lock, flags);
 672
 673         if (ret) {
 674                 err("could not submit urb (error %d)\n", -ret);
 675                 atomic_set(&ucs->busy, 0);
 676         }
 677
 678         if (!bcs->tx_skb->len) {
 679                 /* skb sent completely */
 680                 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
 681
 682                 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
 683                         (unsigned long) bcs->tx_skb);
 684                 dev_kfree_skb_any(bcs->tx_skb);
 685                 bcs->tx_skb = NULL;
 686         }
 687
 688         return ret;
 689 }
 690
 691 static int gigaset_probe(struct usb_interface *interface,
 692                          const struct usb_device_id *id)
 693 {
 694         int retval;
 695         struct usb_device *udev = interface_to_usbdev(interface);
 696         unsigned int ifnum;
 697         struct usb_host_interface *hostif;
 698         struct cardstate *cs = NULL;
 699         struct usb_cardstate *ucs = NULL;
 700         struct usb_endpoint_descriptor *endpoint;
 701         int buffer_size;
 702         int alt;
 703
 704         gig_dbg(DEBUG_ANY,
 705                 "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
 706                 __func__, le16_to_cpu(udev->descriptor.idVendor),
 707                 le16_to_cpu(udev->descriptor.idProduct));
 708
 709         retval = -ENODEV; //FIXME
 710
 711         /* See if the device offered us matches what we can accept */
 712         if ((le16_to_cpu(udev->descriptor.idVendor)  != USB_M105_VENDOR_ID) ||
 713             (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID))
 714                 return -ENODEV;
 715
 716         /* this starts to become ascii art... */
 717         hostif = interface->cur_altsetting;
 718         alt = hostif->desc.bAlternateSetting;
 719         ifnum = hostif->desc.bInterfaceNumber; // FIXME ?
 720
 721         if (alt != 0 || ifnum != 0) {
 722                 dev_warn(&udev->dev, "ifnum %d, alt %d\n", ifnum, alt);
 723                 return -ENODEV;
 724         }
 725
 726         /* Reject application specific intefaces
 727          *
 728          */
 729         if (hostif->desc.bInterfaceClass != 255) {
 730                 dev_info(&udev->dev,
 731                 "%s: Device matched but iface_desc[%d]->bInterfaceClass==%d!\n",
 732                          __func__, ifnum, hostif->desc.bInterfaceClass);
 733                 return -ENODEV;
 734         }
 735
 736         dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
 737
 738         cs = gigaset_getunassignedcs(driver);
 739         if (!cs) {
 740                 dev_warn(&udev->dev, "no free cardstate\n");
 741                 return -ENODEV;
 742         }
 743         ucs = cs->hw.usb;
 744
 745         /* save off device structure ptrs for later use */
 746         usb_get_dev(udev);
 747         ucs->udev = udev;
 748         ucs->interface = interface;
 749         cs->dev = &interface->dev;
 750
 751         /* save address of controller structure */
 752         usb_set_intfdata(interface, cs); // dev_set_drvdata(&interface->dev, cs);
 753
 754         endpoint = &hostif->endpoint[0].desc;
 755
 756         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 757         ucs->bulk_out_size = buffer_size;
 758         ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
 759         ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
 760         if (!ucs->bulk_out_buffer) {
 761                 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
 762                 retval = -ENOMEM;
 763                 goto error;
 764         }
 765
 766         ucs->bulk_out_urb = usb_alloc_urb(0, SLAB_KERNEL);
 767         if (!ucs->bulk_out_urb) {
 768                 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
 769                 retval = -ENOMEM;
 770                 goto error;
 771         }
 772
 773         endpoint = &hostif->endpoint[1].desc;
 774
 775         atomic_set(&ucs->busy, 0);
 776
 777         ucs->read_urb = usb_alloc_urb(0, SLAB_KERNEL);
 778         if (!ucs->read_urb) {
 779                 dev_err(cs->dev, "No free urbs available\n");
 780                 retval = -ENOMEM;
 781                 goto error;
 782         }
 783         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 784         ucs->rcvbuf_size = buffer_size;
 785         ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
 786         cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
 787         if (!cs->inbuf[0].rcvbuf) {
 788                 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
 789                 retval = -ENOMEM;
 790                 goto error;
 791         }
 792         /* Fill the interrupt urb and send it to the core */
 793         usb_fill_int_urb(ucs->read_urb, udev,
 794                          usb_rcvintpipe(udev,
 795                                         endpoint->bEndpointAddress & 0x0f),
 796                          cs->inbuf[0].rcvbuf, buffer_size,
 797                          gigaset_read_int_callback,
 798                          cs->inbuf + 0, endpoint->bInterval);
 799
 800         retval = usb_submit_urb(ucs->read_urb, SLAB_KERNEL);
 801         if (retval) {
 802                 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
 803                 goto error;
 804         }
 805
 806         /* tell common part that the device is ready */
 807         if (startmode == SM_LOCKED)
 808                 atomic_set(&cs->mstate, MS_LOCKED);
 809
 810         if (!gigaset_start(cs)) {
 811                 tasklet_kill(&cs->write_tasklet);
 812                 retval = -ENODEV; //FIXME
 813                 goto error;
 814         }
 815         return 0;
 816
 817 error:
 818         if (ucs->read_urb)
 819                 usb_kill_urb(ucs->read_urb);
 820         kfree(ucs->bulk_out_buffer);
 821         if (ucs->bulk_out_urb != NULL)
 822                 usb_free_urb(ucs->bulk_out_urb);
 823         kfree(cs->inbuf[0].rcvbuf);
 824         if (ucs->read_urb != NULL)
 825                 usb_free_urb(ucs->read_urb);
 826         usb_set_intfdata(interface, NULL);
 827         ucs->read_urb = ucs->bulk_out_urb = NULL;
 828         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
 829         usb_put_dev(ucs->udev);
 830         ucs->udev = NULL;
 831         ucs->interface = NULL;
 832         gigaset_unassign(cs);
 833         return retval;
 834 }
 835
 836 static void gigaset_disconnect(struct usb_interface *interface)
 837 {
 838         struct cardstate *cs;
 839         struct usb_cardstate *ucs;
 840
 841         cs = usb_get_intfdata(interface);
 842         ucs = cs->hw.usb;
 843         usb_kill_urb(ucs->read_urb);
 844
 845         gigaset_stop(cs);
 846
 847         usb_set_intfdata(interface, NULL);
 848         tasklet_kill(&cs->write_tasklet);
 849
 850         usb_kill_urb(ucs->bulk_out_urb);        /* FIXME: only if active? */
 851
 852         kfree(ucs->bulk_out_buffer);
 853         if (ucs->bulk_out_urb != NULL)
 854                 usb_free_urb(ucs->bulk_out_urb);
 855         kfree(cs->inbuf[0].rcvbuf);
 856         if (ucs->read_urb != NULL)
 857                 usb_free_urb(ucs->read_urb);
 858         ucs->read_urb = ucs->bulk_out_urb = NULL;
 859         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
 860
 861         usb_put_dev(ucs->udev);
 862         ucs->interface = NULL;
 863         ucs->udev = NULL;
 864         cs->dev = NULL;
 865         gigaset_unassign(cs);
 866 }
 867
 868 static struct gigaset_ops ops = {
 869         gigaset_write_cmd,
 870         gigaset_write_room,
 871         gigaset_chars_in_buffer,
 872         gigaset_brkchars,
 873         gigaset_init_bchannel,
 874         gigaset_close_bchannel,
 875         gigaset_initbcshw,
 876         gigaset_freebcshw,
 877         gigaset_reinitbcshw,
 878         gigaset_initcshw,
 879         gigaset_freecshw,
 880         gigaset_set_modem_ctrl,
 881         gigaset_baud_rate,
 882         gigaset_set_line_ctrl,
 883         gigaset_m10x_send_skb,
 884         gigaset_m10x_input,
 885 };
 886
 887 /**
 888  *      usb_gigaset_init
 889  * This function is called while kernel-module is loaded
 890  */
 891 static int __init usb_gigaset_init(void)
 892 {
 893         int result;
 894
 895         /* allocate memory for our driver state and intialize it */
 896         if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
 897                                        GIGASET_MODULENAME, GIGASET_DEVNAME,
 898                                        &ops, THIS_MODULE)) == NULL)
 899                 goto error;
 900
 901         /* allocate memory for our device state and intialize it */
 902         cardstate = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
 903         if (!cardstate)
 904                 goto error;
 905
 906         /* register this driver with the USB subsystem */
 907         result = usb_register(&gigaset_usb_driver);
 908         if (result < 0) {
 909                 err("usb_gigaset: usb_register failed (error %d)",
 910                     -result);
 911                 goto error;
 912         }
 913
 914         info(DRIVER_AUTHOR);
 915         info(DRIVER_DESC);
 916         return 0;
 917
 918 error:  if (cardstate)
 919                 gigaset_freecs(cardstate);
 920         cardstate = NULL;
 921         if (driver)
 922                 gigaset_freedriver(driver);
 923         driver = NULL;
 924         return -1;
 925 }
 926
 927
 928 /**
 929  *      usb_gigaset_exit
 930  * This function is called while unloading the kernel-module
 931  */
 932 static void __exit usb_gigaset_exit(void)
 933 {
 934         gigaset_blockdriver(driver); /* => probe will fail
 935                                       * => no gigaset_start any more
 936                                       */
 937
 938         gigaset_shutdown(cardstate);
 939         /* from now on, no isdn callback should be possible */
 940
 941         /* deregister this driver with the USB subsystem */
 942         usb_deregister(&gigaset_usb_driver);
 943         /* this will call the disconnect-callback */
 944         /* from now on, no disconnect/probe callback should be running */
 945
 946         gigaset_freecs(cardstate);
 947         cardstate = NULL;
 948         gigaset_freedriver(driver);
 949         driver = NULL;
 950 }
 951
 952
 953 module_init(usb_gigaset_init);
 954 module_exit(usb_gigaset_exit);
 955
 956 MODULE_AUTHOR(DRIVER_AUTHOR);
 957 MODULE_DESCRIPTION(DRIVER_DESC);
 958
 959 MODULE_LICENSE("GPL");