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