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