git.oblomov.eu Git - linux-2.6/blob - drivers/isdn/gigaset/usb-gigaset.c

   1 /*
   2  * USB driver for Gigaset 307x directly or using M105 Data.
   3  *
   4  * Copyright (c) 2001 by Stefan Eilers
   5  *                   and Hansjoerg Lipp <hjlipp@web.de>.
   6  *
   7  * This driver was derived from the USB skeleton driver by
   8  * Greg Kroah-Hartman <greg@kroah.com>
   9  *
  10  * =====================================================================
  11  *      This program is free software; you can redistribute it and/or
  12  *      modify it under the terms of the GNU General Public License as
  13  *      published by the Free Software Foundation; either version 2 of
  14  *      the License, or (at your option) any later version.
  15  * =====================================================================
  16  */
  17
  18 #include "gigaset.h"
  19
  20 #include <linux/errno.h>
  21 #include <linux/init.h>
  22 #include <linux/slab.h>
  23 #include <linux/usb.h>
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26
  27 /* Version Information */
  28 #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
  29 #define DRIVER_DESC "USB Driver for Gigaset 307x using M105"
  30
  31 /* Module parameters */
  32
  33 static int startmode = SM_ISDN;
  34 static int cidmode = 1;
  35
  36 module_param(startmode, int, S_IRUGO);
  37 module_param(cidmode, int, S_IRUGO);
  38 MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
  39 MODULE_PARM_DESC(cidmode, "Call-ID mode");
  40
  41 #define GIGASET_MINORS     1
  42 #define GIGASET_MINOR      8
  43 #define GIGASET_MODULENAME "usb_gigaset"
  44 #define GIGASET_DEVNAME    "ttyGU"
  45
  46 #define IF_WRITEBUF 2000 //FIXME  // WAKEUP_CHARS: 256
  47
  48 /* Values for the Gigaset M105 Data */
  49 #define USB_M105_VENDOR_ID      0x0681
  50 #define USB_M105_PRODUCT_ID     0x0009
  51
  52 /* table of devices that work with this driver */
  53 static const struct usb_device_id gigaset_table [] = {
  54         { USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
  55         { }                                     /* Terminating entry */
  56 };
  57
  58 MODULE_DEVICE_TABLE(usb, gigaset_table);
  59
  60 /*
  61  * Control requests (empty fields: 00)
  62  *
  63  *       RT|RQ|VALUE|INDEX|LEN  |DATA
  64  * In:
  65  *       C1 08             01
  66  *            Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
  67  *       C1 0F             ll ll
  68  *            Get device information/status (llll: 0x200 and 0x40 seen).
  69  *            Real size: I only saw MIN(llll,0x64).
  70  *            Contents: seems to be always the same...
  71  *              offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
  72  *              offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
  73  *              rest:        ?
  74  * Out:
  75  *       41 11
  76  *            Initialize/reset device ?
  77  *       41 00 xx 00
  78  *            ? (xx=00 or 01; 01 on start, 00 on close)
  79  *       41 07 vv mm
  80  *            Set/clear flags vv=value, mm=mask (see RQ 08)
  81  *       41 12 xx
  82  *            Used before the following configuration requests are issued
  83  *            (with xx=0x0f). I've seen other values<0xf, though.
  84  *       41 01 xx xx
  85  *            Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
  86  *       41 03 ps bb
  87  *            Set byte size and parity. p:  0x20=even,0x10=odd,0x00=no parity
  88  *                                     [    0x30: m, 0x40: s           ]
  89  *                                     [s:  0: 1 stop bit; 1: 1.5; 2: 2]
  90  *                                      bb: bits/byte (seen 7 and 8)
  91  *       41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
  92  *            ??
  93  *            Initialization: 01, 40, 00, 00
  94  *            Open device:    00  40, 00, 00
  95  *            yy and zz seem to be equal, either 0x00 or 0x0a
  96  *            (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
  97  *       41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
  98  *            Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
  99  *            xx is usually 0x00 but was 0x7e before starting data transfer
 100  *            in unimodem mode. So, this might be an array of characters that need
 101  *            special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
 102  *
 103  * Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
 104  * flags per packet.
 105  */
 106
 107 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         int again;
 314
 315         gig_dbg(DEBUG_OUTPUT, "modem_fill");
 316
 317         if (atomic_read(&cs->hw.usb->busy)) {
 318                 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
 319                 return;
 320         }
 321
 322         do {
 323                 again = 0;
 324                 if (!bcs->tx_skb) { /* no skb is being sent */
 325                         cb = cs->cmdbuf;
 326                         if (cb) { /* commands to send? */
 327                                 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
 328                                 if (send_cb(cs, cb) < 0) {
 329                                         gig_dbg(DEBUG_OUTPUT,
 330                                                 "modem_fill: send_cb failed");
 331                                         again = 1; /* no callback will be
 332                                                       called! */
 333                                 }
 334                         } else { /* skbs to send? */
 335                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
 336                                 if (bcs->tx_skb)
 337                                         gig_dbg(DEBUG_INTR,
 338                                                 "Dequeued skb (Adr: %lx)!",
 339                                                 (unsigned long) bcs->tx_skb);
 340                         }
 341                 }
 342
 343                 if (bcs->tx_skb) {
 344                         gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
 345                         if (write_modem(cs) < 0) {
 346                                 gig_dbg(DEBUG_OUTPUT,
 347                                         "modem_fill: write_modem failed");
 348                                 // FIXME should we tell the LL?
 349                                 again = 1; /* no callback will be called! */
 350                         }
 351                 }
 352         } while (again);
 353 }
 354
 355 /**
 356  *      gigaset_read_int_callback
 357  *
 358  *      It is called if the data was received from the device.
 359  */
 360 static void gigaset_read_int_callback(struct urb *urb)
 361 {
 362         struct inbuf_t *inbuf = urb->context;
 363         struct cardstate *cs = inbuf->cs;
 364         int resubmit = 0;
 365         int r;
 366         unsigned numbytes;
 367         unsigned char *src;
 368         unsigned long flags;
 369
 370         if (!urb->status) {
 371                 if (!cs->connected) {
 372                         err("%s: disconnected", __func__); /* should never happen */
 373                         return;
 374                 }
 375
 376                 numbytes = urb->actual_length;
 377
 378                 if (numbytes) {
 379                         src = inbuf->rcvbuf;
 380                         if (unlikely(*src))
 381                                 dev_warn(cs->dev,
 382                                     "%s: There was no leading 0, but 0x%02x!\n",
 383                                          __func__, (unsigned) *src);
 384                         ++src; /* skip leading 0x00 */
 385                         --numbytes;
 386                         if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
 387                                 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
 388                                 gigaset_schedule_event(inbuf->cs);
 389                         }
 390                 } else
 391                         gig_dbg(DEBUG_INTR, "Received zero block length");
 392                 resubmit = 1;
 393         } else {
 394                 /* The urb might have been killed. */
 395                 gig_dbg(DEBUG_ANY, "%s - nonzero read bulk status received: %d",
 396                         __func__, urb->status);
 397                 if (urb->status != -ENOENT) { /* not killed */
 398                         if (!cs->connected) {
 399                                 err("%s: disconnected", __func__); /* should never happen */
 400                                 return;
 401                         }
 402                         resubmit = 1;
 403                 }
 404         }
 405
 406         if (resubmit) {
 407                 spin_lock_irqsave(&cs->lock, flags);
 408                 r = cs->connected ? usb_submit_urb(urb, GFP_ATOMIC) : -ENODEV;
 409                 spin_unlock_irqrestore(&cs->lock, flags);
 410                 if (r)
 411                         dev_err(cs->dev, "error %d when resubmitting urb.\n",
 412                                 -r);
 413         }
 414 }
 415
 416
 417 /* This callback routine is called when data was transmitted to the device. */
 418 static void gigaset_write_bulk_callback(struct urb *urb)
 419 {
 420         struct cardstate *cs = urb->context;
 421         unsigned long flags;
 422
 423         if (urb->status)
 424                 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
 425                         -urb->status);
 426                 /* That's all we can do. Communication problems
 427                    are handled by timeouts or network protocols. */
 428
 429         spin_lock_irqsave(&cs->lock, flags);
 430         if (!cs->connected) {
 431                 err("%s: not connected", __func__);
 432         } else {
 433                 atomic_set(&cs->hw.usb->busy, 0);
 434                 tasklet_schedule(&cs->write_tasklet);
 435         }
 436         spin_unlock_irqrestore(&cs->lock, flags);
 437 }
 438
 439 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
 440 {
 441         struct cmdbuf_t *tcb;
 442         unsigned long flags;
 443         int count;
 444         int status = -ENOENT; // FIXME
 445         struct usb_cardstate *ucs = cs->hw.usb;
 446
 447         do {
 448                 if (!cb->len) {
 449                         tcb = cb;
 450
 451                         spin_lock_irqsave(&cs->cmdlock, flags);
 452                         cs->cmdbytes -= cs->curlen;
 453                         gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
 454                                 cs->curlen, cs->cmdbytes);
 455                         cs->cmdbuf = cb = cb->next;
 456                         if (cb) {
 457                                 cb->prev = NULL;
 458                                 cs->curlen = cb->len;
 459                         } else {
 460                                 cs->lastcmdbuf = NULL;
 461                                 cs->curlen = 0;
 462                         }
 463                         spin_unlock_irqrestore(&cs->cmdlock, flags);
 464
 465                         if (tcb->wake_tasklet)
 466                                 tasklet_schedule(tcb->wake_tasklet);
 467                         kfree(tcb);
 468                 }
 469                 if (cb) {
 470                         count = min(cb->len, ucs->bulk_out_size);
 471                         gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
 472
 473                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 474                                           usb_sndbulkpipe(ucs->udev,
 475                                              ucs->bulk_out_endpointAddr & 0x0f),
 476                                           cb->buf + cb->offset, count,
 477                                           gigaset_write_bulk_callback, cs);
 478
 479                         cb->offset += count;
 480                         cb->len -= count;
 481                         atomic_set(&ucs->busy, 1);
 482
 483                         spin_lock_irqsave(&cs->lock, flags);
 484                         status = cs->connected ? usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) : -ENODEV;
 485                         spin_unlock_irqrestore(&cs->lock, flags);
 486
 487                         if (status) {
 488                                 atomic_set(&ucs->busy, 0);
 489                                 err("could not submit urb (error %d)\n",
 490                                     -status);
 491                                 cb->len = 0; /* skip urb => remove cb+wakeup
 492                                                 in next loop cycle */
 493                         }
 494                 }
 495         } while (cb && status); /* next command on error */
 496
 497         return status;
 498 }
 499
 500 /* Send command to device. */
 501 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
 502                              int len, struct tasklet_struct *wake_tasklet)
 503 {
 504         struct cmdbuf_t *cb;
 505         unsigned long flags;
 506
 507         gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ?
 508                              DEBUG_TRANSCMD : DEBUG_LOCKCMD,
 509                            "CMD Transmit", len, buf);
 510
 511         if (len <= 0)
 512                 return 0;
 513
 514         if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
 515                 dev_err(cs->dev, "%s: out of memory\n", __func__);
 516                 return -ENOMEM;
 517         }
 518
 519         memcpy(cb->buf, buf, len);
 520         cb->len = len;
 521         cb->offset = 0;
 522         cb->next = NULL;
 523         cb->wake_tasklet = wake_tasklet;
 524
 525         spin_lock_irqsave(&cs->cmdlock, flags);
 526         cb->prev = cs->lastcmdbuf;
 527         if (cs->lastcmdbuf)
 528                 cs->lastcmdbuf->next = cb;
 529         else {
 530                 cs->cmdbuf = cb;
 531                 cs->curlen = len;
 532         }
 533         cs->cmdbytes += len;
 534         cs->lastcmdbuf = cb;
 535         spin_unlock_irqrestore(&cs->cmdlock, flags);
 536
 537         spin_lock_irqsave(&cs->lock, flags);
 538         if (cs->connected)
 539                 tasklet_schedule(&cs->write_tasklet);
 540         spin_unlock_irqrestore(&cs->lock, flags);
 541         return len;
 542 }
 543
 544 static int gigaset_write_room(struct cardstate *cs)
 545 {
 546         unsigned bytes;
 547
 548         bytes = cs->cmdbytes;
 549         return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
 550 }
 551
 552 static int gigaset_chars_in_buffer(struct cardstate *cs)
 553 {
 554         return cs->cmdbytes;
 555 }
 556
 557 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
 558 {
 559 #ifdef CONFIG_GIGASET_UNDOCREQ
 560         struct usb_device *udev = cs->hw.usb->udev;
 561
 562         gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
 563         memcpy(cs->hw.usb->bchars, buf, 6);
 564         return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
 565                                0, 0, &buf, 6, 2000);
 566 #else
 567         return -EINVAL;
 568 #endif
 569 }
 570
 571 static int gigaset_freebcshw(struct bc_state *bcs)
 572 {
 573         /* unused */
 574         return 1;
 575 }
 576
 577 /* Initialize the b-channel structure */
 578 static int gigaset_initbcshw(struct bc_state *bcs)
 579 {
 580         /* unused */
 581         bcs->hw.usb = NULL;
 582         return 1;
 583 }
 584
 585 static void gigaset_reinitbcshw(struct bc_state *bcs)
 586 {
 587         /* nothing to do for M10x */
 588 }
 589
 590 static void gigaset_freecshw(struct cardstate *cs)
 591 {
 592         tasklet_kill(&cs->write_tasklet);
 593         kfree(cs->hw.usb);
 594 }
 595
 596 static int gigaset_initcshw(struct cardstate *cs)
 597 {
 598         struct usb_cardstate *ucs;
 599
 600         cs->hw.usb = ucs =
 601                 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
 602         if (!ucs)
 603                 return 0;
 604
 605         ucs->bchars[0] = 0;
 606         ucs->bchars[1] = 0;
 607         ucs->bchars[2] = 0;
 608         ucs->bchars[3] = 0;
 609         ucs->bchars[4] = 0x11;
 610         ucs->bchars[5] = 0x13;
 611         ucs->bulk_out_buffer = NULL;
 612         ucs->bulk_out_urb = NULL;
 613         //ucs->urb_cmd_out = NULL;
 614         ucs->read_urb = NULL;
 615         tasklet_init(&cs->write_tasklet,
 616                      &gigaset_modem_fill, (unsigned long) cs);
 617
 618         return 1;
 619 }
 620
 621 /* Send data from current skb to the device. */
 622 static int write_modem(struct cardstate *cs)
 623 {
 624         int ret = 0;
 625         int count;
 626         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 627         struct usb_cardstate *ucs = cs->hw.usb;
 628         unsigned long flags;
 629
 630         gig_dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
 631
 632         if (!bcs->tx_skb->len) {
 633                 dev_kfree_skb_any(bcs->tx_skb);
 634                 bcs->tx_skb = NULL;
 635                 return -EINVAL;
 636         }
 637
 638         /* Copy data to bulk out buffer and  // FIXME copying not necessary
 639          * transmit data
 640          */
 641         count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
 642         skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
 643         skb_pull(bcs->tx_skb, count);
 644         atomic_set(&ucs->busy, 1);
 645         gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
 646
 647         spin_lock_irqsave(&cs->lock, flags);
 648         if (cs->connected) {
 649                 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 650                                   usb_sndbulkpipe(ucs->udev,
 651                                                   ucs->bulk_out_endpointAddr & 0x0f),
 652                                   ucs->bulk_out_buffer, count,
 653                                   gigaset_write_bulk_callback, cs);
 654                 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
 655         } else {
 656                 ret = -ENODEV;
 657         }
 658         spin_unlock_irqrestore(&cs->lock, flags);
 659
 660         if (ret) {
 661                 err("could not submit urb (error %d)\n", -ret);
 662                 atomic_set(&ucs->busy, 0);
 663         }
 664
 665         if (!bcs->tx_skb->len) {
 666                 /* skb sent completely */
 667                 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
 668
 669                 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
 670                         (unsigned long) bcs->tx_skb);
 671                 dev_kfree_skb_any(bcs->tx_skb);
 672                 bcs->tx_skb = NULL;
 673         }
 674
 675         return ret;
 676 }
 677
 678 static int gigaset_probe(struct usb_interface *interface,
 679                          const struct usb_device_id *id)
 680 {
 681         int retval;
 682         struct usb_device *udev = interface_to_usbdev(interface);
 683         unsigned int ifnum;
 684         struct usb_host_interface *hostif;
 685         struct cardstate *cs = NULL;
 686         struct usb_cardstate *ucs = NULL;
 687         struct usb_endpoint_descriptor *endpoint;
 688         int buffer_size;
 689         int alt;
 690
 691         gig_dbg(DEBUG_ANY,
 692                 "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
 693                 __func__, le16_to_cpu(udev->descriptor.idVendor),
 694                 le16_to_cpu(udev->descriptor.idProduct));
 695
 696         retval = -ENODEV; //FIXME
 697
 698         /* See if the device offered us matches what we can accept */
 699         if ((le16_to_cpu(udev->descriptor.idVendor)  != USB_M105_VENDOR_ID) ||
 700             (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID))
 701                 return -ENODEV;
 702
 703         /* this starts to become ascii art... */
 704         hostif = interface->cur_altsetting;
 705         alt = hostif->desc.bAlternateSetting;
 706         ifnum = hostif->desc.bInterfaceNumber; // FIXME ?
 707
 708         if (alt != 0 || ifnum != 0) {
 709                 dev_warn(&udev->dev, "ifnum %d, alt %d\n", ifnum, alt);
 710                 return -ENODEV;
 711         }
 712
 713         /* Reject application specific intefaces
 714          *
 715          */
 716         if (hostif->desc.bInterfaceClass != 255) {
 717                 dev_info(&udev->dev,
 718                 "%s: Device matched but iface_desc[%d]->bInterfaceClass==%d!\n",
 719                          __func__, ifnum, hostif->desc.bInterfaceClass);
 720                 return -ENODEV;
 721         }
 722
 723         dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
 724
 725         cs = gigaset_getunassignedcs(driver);
 726         if (!cs) {
 727                 dev_warn(&udev->dev, "no free cardstate\n");
 728                 return -ENODEV;
 729         }
 730         ucs = cs->hw.usb;
 731
 732         /* save off device structure ptrs for later use */
 733         usb_get_dev(udev);
 734         ucs->udev = udev;
 735         ucs->interface = interface;
 736         cs->dev = &interface->dev;
 737
 738         /* save address of controller structure */
 739         usb_set_intfdata(interface, cs); // dev_set_drvdata(&interface->dev, cs);
 740
 741         endpoint = &hostif->endpoint[0].desc;
 742
 743         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 744         ucs->bulk_out_size = buffer_size;
 745         ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
 746         ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
 747         if (!ucs->bulk_out_buffer) {
 748                 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
 749                 retval = -ENOMEM;
 750                 goto error;
 751         }
 752
 753         ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
 754         if (!ucs->bulk_out_urb) {
 755                 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
 756                 retval = -ENOMEM;
 757                 goto error;
 758         }
 759
 760         endpoint = &hostif->endpoint[1].desc;
 761
 762         atomic_set(&ucs->busy, 0);
 763
 764         ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
 765         if (!ucs->read_urb) {
 766                 dev_err(cs->dev, "No free urbs available\n");
 767                 retval = -ENOMEM;
 768                 goto error;
 769         }
 770         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 771         ucs->rcvbuf_size = buffer_size;
 772         ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
 773         cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
 774         if (!cs->inbuf[0].rcvbuf) {
 775                 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
 776                 retval = -ENOMEM;
 777                 goto error;
 778         }
 779         /* Fill the interrupt urb and send it to the core */
 780         usb_fill_int_urb(ucs->read_urb, udev,
 781                          usb_rcvintpipe(udev,
 782                                         endpoint->bEndpointAddress & 0x0f),
 783                          cs->inbuf[0].rcvbuf, buffer_size,
 784                          gigaset_read_int_callback,
 785                          cs->inbuf + 0, endpoint->bInterval);
 786
 787         retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
 788         if (retval) {
 789                 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
 790                 goto error;
 791         }
 792
 793         /* tell common part that the device is ready */
 794         if (startmode == SM_LOCKED)
 795                 atomic_set(&cs->mstate, MS_LOCKED);
 796
 797         if (!gigaset_start(cs)) {
 798                 tasklet_kill(&cs->write_tasklet);
 799                 retval = -ENODEV; //FIXME
 800                 goto error;
 801         }
 802         return 0;
 803
 804 error:
 805         usb_kill_urb(ucs->read_urb);
 806         kfree(ucs->bulk_out_buffer);
 807         usb_free_urb(ucs->bulk_out_urb);
 808         kfree(cs->inbuf[0].rcvbuf);
 809         usb_free_urb(ucs->read_urb);
 810         usb_set_intfdata(interface, NULL);
 811         ucs->read_urb = ucs->bulk_out_urb = NULL;
 812         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
 813         usb_put_dev(ucs->udev);
 814         ucs->udev = NULL;
 815         ucs->interface = NULL;
 816         gigaset_unassign(cs);
 817         return retval;
 818 }
 819
 820 static void gigaset_disconnect(struct usb_interface *interface)
 821 {
 822         struct cardstate *cs;
 823         struct usb_cardstate *ucs;
 824
 825         cs = usb_get_intfdata(interface);
 826         ucs = cs->hw.usb;
 827         usb_kill_urb(ucs->read_urb);
 828
 829         gigaset_stop(cs);
 830
 831         usb_set_intfdata(interface, NULL);
 832         tasklet_kill(&cs->write_tasklet);
 833
 834         usb_kill_urb(ucs->bulk_out_urb);        /* FIXME: only if active? */
 835
 836         kfree(ucs->bulk_out_buffer);
 837         usb_free_urb(ucs->bulk_out_urb);
 838         kfree(cs->inbuf[0].rcvbuf);
 839         usb_free_urb(ucs->read_urb);
 840         ucs->read_urb = ucs->bulk_out_urb = NULL;
 841         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
 842
 843         usb_put_dev(ucs->udev);
 844         ucs->interface = NULL;
 845         ucs->udev = NULL;
 846         cs->dev = NULL;
 847         gigaset_unassign(cs);
 848 }
 849
 850 static const struct gigaset_ops ops = {
 851         gigaset_write_cmd,
 852         gigaset_write_room,
 853         gigaset_chars_in_buffer,
 854         gigaset_brkchars,
 855         gigaset_init_bchannel,
 856         gigaset_close_bchannel,
 857         gigaset_initbcshw,
 858         gigaset_freebcshw,
 859         gigaset_reinitbcshw,
 860         gigaset_initcshw,
 861         gigaset_freecshw,
 862         gigaset_set_modem_ctrl,
 863         gigaset_baud_rate,
 864         gigaset_set_line_ctrl,
 865         gigaset_m10x_send_skb,
 866         gigaset_m10x_input,
 867 };
 868
 869 /**
 870  *      usb_gigaset_init
 871  * This function is called while kernel-module is loaded
 872  */
 873 static int __init usb_gigaset_init(void)
 874 {
 875         int result;
 876
 877         /* allocate memory for our driver state and intialize it */
 878         if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
 879                                        GIGASET_MODULENAME, GIGASET_DEVNAME,
 880                                        &ops, THIS_MODULE)) == NULL)
 881                 goto error;
 882
 883         /* allocate memory for our device state and intialize it */
 884         cardstate = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
 885         if (!cardstate)
 886                 goto error;
 887
 888         /* register this driver with the USB subsystem */
 889         result = usb_register(&gigaset_usb_driver);
 890         if (result < 0) {
 891                 err("usb_gigaset: usb_register failed (error %d)",
 892                     -result);
 893                 goto error;
 894         }
 895
 896         info(DRIVER_AUTHOR);
 897         info(DRIVER_DESC);
 898         return 0;
 899
 900 error:  if (cardstate)
 901                 gigaset_freecs(cardstate);
 902         cardstate = NULL;
 903         if (driver)
 904                 gigaset_freedriver(driver);
 905         driver = NULL;
 906         return -1;
 907 }
 908
 909
 910 /**
 911  *      usb_gigaset_exit
 912  * This function is called while unloading the kernel-module
 913  */
 914 static void __exit usb_gigaset_exit(void)
 915 {
 916         gigaset_blockdriver(driver); /* => probe will fail
 917                                       * => no gigaset_start any more
 918                                       */
 919
 920         gigaset_shutdown(cardstate);
 921         /* from now on, no isdn callback should be possible */
 922
 923         /* deregister this driver with the USB subsystem */
 924         usb_deregister(&gigaset_usb_driver);
 925         /* this will call the disconnect-callback */
 926         /* from now on, no disconnect/probe callback should be running */
 927
 928         gigaset_freecs(cardstate);
 929         cardstate = NULL;
 930         gigaset_freedriver(driver);
 931         driver = NULL;
 932 }
 933
 934
 935 module_init(usb_gigaset_init);
 936 module_exit(usb_gigaset_exit);
 937
 938 MODULE_AUTHOR(DRIVER_AUTHOR);
 939 MODULE_DESCRIPTION(DRIVER_DESC);
 940
 941 MODULE_LICENSE("GPL");