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   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 #include <linux/usb.h>
  20 #include <linux/module.h>
  21 #include <linux/moduleparam.h>
  22
  23 /* Version Information */
  24 #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
  25 #define DRIVER_DESC "USB Driver for Gigaset 307x using M105"
  26
  27 /* Module parameters */
  28
  29 static int startmode = SM_ISDN;
  30 static int cidmode = 1;
  31
  32 module_param(startmode, int, S_IRUGO);
  33 module_param(cidmode, int, S_IRUGO);
  34 MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
  35 MODULE_PARM_DESC(cidmode, "Call-ID mode");
  36
  37 #define GIGASET_MINORS     1
  38 #define GIGASET_MINOR      8
  39 #define GIGASET_MODULENAME "usb_gigaset"
  40 #define GIGASET_DEVNAME    "ttyGU"
  41
  42 #define IF_WRITEBUF 2000        /* arbitrary limit */
  43
  44 /* Values for the Gigaset M105 Data */
  45 #define USB_M105_VENDOR_ID      0x0681
  46 #define USB_M105_PRODUCT_ID     0x0009
  47
  48 /* table of devices that work with this driver */
  49 static const struct usb_device_id gigaset_table[] = {
  50         { USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
  51         { }                                     /* Terminating entry */
  52 };
  53
  54 MODULE_DEVICE_TABLE(usb, gigaset_table);
  55
  56 /*
  57  * Control requests (empty fields: 00)
  58  *
  59  *       RT|RQ|VALUE|INDEX|LEN  |DATA
  60  * In:
  61  *       C1 08             01
  62  *            Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
  63  *       C1 0F             ll ll
  64  *            Get device information/status (llll: 0x200 and 0x40 seen).
  65  *            Real size: I only saw MIN(llll,0x64).
  66  *            Contents: seems to be always the same...
  67  *              offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
  68  *              offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
  69  *              rest:        ?
  70  * Out:
  71  *       41 11
  72  *            Initialize/reset device ?
  73  *       41 00 xx 00
  74  *            ? (xx=00 or 01; 01 on start, 00 on close)
  75  *       41 07 vv mm
  76  *            Set/clear flags vv=value, mm=mask (see RQ 08)
  77  *       41 12 xx
  78  *            Used before the following configuration requests are issued
  79  *            (with xx=0x0f). I've seen other values<0xf, though.
  80  *       41 01 xx xx
  81  *            Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
  82  *       41 03 ps bb
  83  *            Set byte size and parity. p:  0x20=even,0x10=odd,0x00=no parity
  84  *                                     [    0x30: m, 0x40: s           ]
  85  *                                     [s:  0: 1 stop bit; 1: 1.5; 2: 2]
  86  *                                      bb: bits/byte (seen 7 and 8)
  87  *       41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
  88  *            ??
  89  *            Initialization: 01, 40, 00, 00
  90  *            Open device:    00  40, 00, 00
  91  *            yy and zz seem to be equal, either 0x00 or 0x0a
  92  *            (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
  93  *       41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
  94  *            Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
  95  *            xx is usually 0x00 but was 0x7e before starting data transfer
  96  *            in unimodem mode. So, this might be an array of characters that
  97  *            need special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
  98  *
  99  * Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
 100  * flags per packet.
 101  */
 102
 103 /* functions called if a device of this driver is connected/disconnected */
 104 static int gigaset_probe(struct usb_interface *interface,
 105                          const struct usb_device_id *id);
 106 static void gigaset_disconnect(struct usb_interface *interface);
 107
 108 /* functions called before/after suspend */
 109 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
 110 static int gigaset_resume(struct usb_interface *intf);
 111 static int gigaset_pre_reset(struct usb_interface *intf);
 112
 113 static struct gigaset_driver *driver;
 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         .suspend =      gigaset_suspend,
 122         .resume =       gigaset_resume,
 123         .reset_resume = gigaset_resume,
 124         .pre_reset =    gigaset_pre_reset,
 125         .post_reset =   gigaset_resume,
 126 };
 127
 128 struct usb_cardstate {
 129         struct usb_device       *udev;          /* usb device pointer */
 130         struct usb_interface    *interface;     /* interface for this device */
 131         int                     busy;           /* bulk output in progress */
 132
 133         /* Output buffer */
 134         unsigned char           *bulk_out_buffer;
 135         int                     bulk_out_size;
 136         __u8                    bulk_out_endpointAddr;
 137         struct urb              *bulk_out_urb;
 138
 139         /* Input buffer */
 140         unsigned char           *rcvbuf;
 141         int                     rcvbuf_size;
 142         struct urb              *read_urb;
 143         __u8                    int_in_endpointAddr;
 144
 145         char                    bchars[6];              /* for request 0x19 */
 146 };
 147
 148 static inline unsigned tiocm_to_gigaset(unsigned state)
 149 {
 150         return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
 151 }
 152
 153 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
 154                                   unsigned new_state)
 155 {
 156         struct usb_device *udev = cs->hw.usb->udev;
 157         unsigned mask, val;
 158         int r;
 159
 160         mask = tiocm_to_gigaset(old_state ^ new_state);
 161         val = tiocm_to_gigaset(new_state);
 162
 163         gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
 164         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
 165                             (val & 0xff) | ((mask & 0xff) << 8), 0,
 166                             NULL, 0, 2000 /* timeout? */);
 167         if (r < 0)
 168                 return r;
 169         return 0;
 170 }
 171
 172 /*
 173  * Set M105 configuration value
 174  * using undocumented device commands reverse engineered from USB traces
 175  * of the Siemens Windows driver
 176  */
 177 static int set_value(struct cardstate *cs, u8 req, u16 val)
 178 {
 179         struct usb_device *udev = cs->hw.usb->udev;
 180         int r, r2;
 181
 182         gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
 183                 (unsigned)req, (unsigned)val);
 184         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
 185                             0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
 186                             /* no idea what this does */
 187         if (r < 0) {
 188                 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
 189                 return r;
 190         }
 191
 192         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
 193                             val, 0, NULL, 0, 2000 /*?*/);
 194         if (r < 0)
 195                 dev_err(&udev->dev, "error %d on request 0x%02x\n",
 196                         -r, (unsigned)req);
 197
 198         r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
 199                              0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
 200         if (r2 < 0)
 201                 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
 202
 203         return r < 0 ? r : (r2 < 0 ? r2 : 0);
 204 }
 205
 206 /*
 207  * set the baud rate on the internal serial adapter
 208  * using the undocumented parameter setting command
 209  */
 210 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
 211 {
 212         u16 val;
 213         u32 rate;
 214
 215         cflag &= CBAUD;
 216
 217         switch (cflag) {
 218         case    B300: rate =     300; break;
 219         case    B600: rate =     600; break;
 220         case   B1200: rate =    1200; break;
 221         case   B2400: rate =    2400; break;
 222         case   B4800: rate =    4800; break;
 223         case   B9600: rate =    9600; break;
 224         case  B19200: rate =   19200; break;
 225         case  B38400: rate =   38400; break;
 226         case  B57600: rate =   57600; break;
 227         case B115200: rate =  115200; break;
 228         default:
 229                 rate =  9600;
 230                 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
 231                         " using default of B9600\n", cflag);
 232         }
 233
 234         val = 0x383fff / rate + 1;
 235
 236         return set_value(cs, 1, val);
 237 }
 238
 239 /*
 240  * set the line format on the internal serial adapter
 241  * using the undocumented parameter setting command
 242  */
 243 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
 244 {
 245         u16 val = 0;
 246
 247         /* set the parity */
 248         if (cflag & PARENB)
 249                 val |= (cflag & PARODD) ? 0x10 : 0x20;
 250
 251         /* set the number of data bits */
 252         switch (cflag & CSIZE) {
 253         case CS5:
 254                 val |= 5 << 8; break;
 255         case CS6:
 256                 val |= 6 << 8; break;
 257         case CS7:
 258                 val |= 7 << 8; break;
 259         case CS8:
 260                 val |= 8 << 8; break;
 261         default:
 262                 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
 263                 val |= 8 << 8;
 264                 break;
 265         }
 266
 267         /* set the number of stop bits */
 268         if (cflag & CSTOPB) {
 269                 if ((cflag & CSIZE) == CS5)
 270                         val |= 1; /* 1.5 stop bits */
 271                 else
 272                         val |= 2; /* 2 stop bits */
 273         }
 274
 275         return set_value(cs, 3, val);
 276 }
 277
 278
 279 /*============================================================================*/
 280 static int gigaset_init_bchannel(struct bc_state *bcs)
 281 {
 282         /* nothing to do for M10x */
 283         gigaset_bchannel_up(bcs);
 284         return 0;
 285 }
 286
 287 static int gigaset_close_bchannel(struct bc_state *bcs)
 288 {
 289         /* nothing to do for M10x */
 290         gigaset_bchannel_down(bcs);
 291         return 0;
 292 }
 293
 294 static int write_modem(struct cardstate *cs);
 295 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
 296
 297
 298 /* Write tasklet handler: Continue sending current skb, or send command, or
 299  * start sending an skb from the send queue.
 300  */
 301 static void gigaset_modem_fill(unsigned long data)
 302 {
 303         struct cardstate *cs = (struct cardstate *) data;
 304         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 305         struct cmdbuf_t *cb;
 306         int again;
 307
 308         gig_dbg(DEBUG_OUTPUT, "modem_fill");
 309
 310         if (cs->hw.usb->busy) {
 311                 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
 312                 return;
 313         }
 314
 315         do {
 316                 again = 0;
 317                 if (!bcs->tx_skb) { /* no skb is being sent */
 318                         cb = cs->cmdbuf;
 319                         if (cb) { /* commands to send? */
 320                                 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
 321                                 if (send_cb(cs, cb) < 0) {
 322                                         gig_dbg(DEBUG_OUTPUT,
 323                                                 "modem_fill: send_cb failed");
 324                                         again = 1; /* no callback will be
 325                                                       called! */
 326                                 }
 327                         } else { /* skbs to send? */
 328                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
 329                                 if (bcs->tx_skb)
 330                                         gig_dbg(DEBUG_INTR,
 331                                                 "Dequeued skb (Adr: %lx)!",
 332                                                 (unsigned long) bcs->tx_skb);
 333                         }
 334                 }
 335
 336                 if (bcs->tx_skb) {
 337                         gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
 338                         if (write_modem(cs) < 0) {
 339                                 gig_dbg(DEBUG_OUTPUT,
 340                                         "modem_fill: write_modem failed");
 341                                 again = 1; /* no callback will be called! */
 342                         }
 343                 }
 344         } while (again);
 345 }
 346
 347 /*
 348  * Interrupt Input URB completion routine
 349  */
 350 static void gigaset_read_int_callback(struct urb *urb)
 351 {
 352         struct cardstate *cs = urb->context;
 353         struct inbuf_t *inbuf = cs->inbuf;
 354         int status = urb->status;
 355         int r;
 356         unsigned numbytes;
 357         unsigned char *src;
 358         unsigned long flags;
 359
 360         if (!status) {
 361                 numbytes = urb->actual_length;
 362
 363                 if (numbytes) {
 364                         src = cs->hw.usb->rcvbuf;
 365                         if (unlikely(*src))
 366                                 dev_warn(cs->dev,
 367                                     "%s: There was no leading 0, but 0x%02x!\n",
 368                                          __func__, (unsigned) *src);
 369                         ++src; /* skip leading 0x00 */
 370                         --numbytes;
 371                         if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
 372                                 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
 373                                 gigaset_schedule_event(inbuf->cs);
 374                         }
 375                 } else
 376                         gig_dbg(DEBUG_INTR, "Received zero block length");
 377         } else {
 378                 /* The urb might have been killed. */
 379                 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
 380                         __func__, status);
 381                 if (status == -ENOENT || status == -ESHUTDOWN)
 382                         /* killed or endpoint shutdown: don't resubmit */
 383                         return;
 384         }
 385
 386         /* resubmit URB */
 387         spin_lock_irqsave(&cs->lock, flags);
 388         if (!cs->connected) {
 389                 spin_unlock_irqrestore(&cs->lock, flags);
 390                 pr_err("%s: disconnected\n", __func__);
 391                 return;
 392         }
 393         r = usb_submit_urb(urb, GFP_ATOMIC);
 394         spin_unlock_irqrestore(&cs->lock, flags);
 395         if (r)
 396                 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
 397 }
 398
 399
 400 /* This callback routine is called when data was transmitted to the device. */
 401 static void gigaset_write_bulk_callback(struct urb *urb)
 402 {
 403         struct cardstate *cs = urb->context;
 404         int status = urb->status;
 405         unsigned long flags;
 406
 407         switch (status) {
 408         case 0:                 /* normal completion */
 409                 break;
 410         case -ENOENT:           /* killed */
 411                 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
 412                 cs->hw.usb->busy = 0;
 413                 return;
 414         default:
 415                 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
 416                         -status);
 417                 /* That's all we can do. Communication problems
 418                    are handled by timeouts or network protocols. */
 419         }
 420
 421         spin_lock_irqsave(&cs->lock, flags);
 422         if (!cs->connected) {
 423                 pr_err("%s: disconnected\n", __func__);
 424         } else {
 425                 cs->hw.usb->busy = 0;
 426                 tasklet_schedule(&cs->write_tasklet);
 427         }
 428         spin_unlock_irqrestore(&cs->lock, flags);
 429 }
 430
 431 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
 432 {
 433         struct cmdbuf_t *tcb;
 434         unsigned long flags;
 435         int count;
 436         int status = -ENOENT;
 437         struct usb_cardstate *ucs = cs->hw.usb;
 438
 439         do {
 440                 if (!cb->len) {
 441                         tcb = cb;
 442
 443                         spin_lock_irqsave(&cs->cmdlock, flags);
 444                         cs->cmdbytes -= cs->curlen;
 445                         gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
 446                                 cs->curlen, cs->cmdbytes);
 447                         cs->cmdbuf = cb = cb->next;
 448                         if (cb) {
 449                                 cb->prev = NULL;
 450                                 cs->curlen = cb->len;
 451                         } else {
 452                                 cs->lastcmdbuf = NULL;
 453                                 cs->curlen = 0;
 454                         }
 455                         spin_unlock_irqrestore(&cs->cmdlock, flags);
 456
 457                         if (tcb->wake_tasklet)
 458                                 tasklet_schedule(tcb->wake_tasklet);
 459                         kfree(tcb);
 460                 }
 461                 if (cb) {
 462                         count = min(cb->len, ucs->bulk_out_size);
 463                         gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
 464
 465                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 466                                           usb_sndbulkpipe(ucs->udev,
 467                                              ucs->bulk_out_endpointAddr & 0x0f),
 468                                           cb->buf + cb->offset, count,
 469                                           gigaset_write_bulk_callback, cs);
 470
 471                         cb->offset += count;
 472                         cb->len -= count;
 473                         ucs->busy = 1;
 474
 475                         spin_lock_irqsave(&cs->lock, flags);
 476                         status = cs->connected ?
 477                                 usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) :
 478                                 -ENODEV;
 479                         spin_unlock_irqrestore(&cs->lock, flags);
 480
 481                         if (status) {
 482                                 ucs->busy = 0;
 483                                 dev_err(cs->dev,
 484                                         "could not submit urb (error %d)\n",
 485                                         -status);
 486                                 cb->len = 0; /* skip urb => remove cb+wakeup
 487                                                 in next loop cycle */
 488                         }
 489                 }
 490         } while (cb && status); /* next command on error */
 491
 492         return status;
 493 }
 494
 495 /* Send command to device. */
 496 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
 497                              int len, struct tasklet_struct *wake_tasklet)
 498 {
 499         struct cmdbuf_t *cb;
 500         unsigned long flags;
 501
 502         gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
 503                              DEBUG_TRANSCMD : DEBUG_LOCKCMD,
 504                            "CMD Transmit", len, buf);
 505
 506         if (len <= 0)
 507                 return 0;
 508         cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC);
 509         if (!cb) {
 510                 dev_err(cs->dev, "%s: out of memory\n", __func__);
 511                 return -ENOMEM;
 512         }
 513
 514         memcpy(cb->buf, buf, len);
 515         cb->len = len;
 516         cb->offset = 0;
 517         cb->next = NULL;
 518         cb->wake_tasklet = wake_tasklet;
 519
 520         spin_lock_irqsave(&cs->cmdlock, flags);
 521         cb->prev = cs->lastcmdbuf;
 522         if (cs->lastcmdbuf)
 523                 cs->lastcmdbuf->next = cb;
 524         else {
 525                 cs->cmdbuf = cb;
 526                 cs->curlen = len;
 527         }
 528         cs->cmdbytes += len;
 529         cs->lastcmdbuf = cb;
 530         spin_unlock_irqrestore(&cs->cmdlock, flags);
 531
 532         spin_lock_irqsave(&cs->lock, flags);
 533         if (cs->connected)
 534                 tasklet_schedule(&cs->write_tasklet);
 535         spin_unlock_irqrestore(&cs->lock, flags);
 536         return len;
 537 }
 538
 539 static int gigaset_write_room(struct cardstate *cs)
 540 {
 541         unsigned bytes;
 542
 543         bytes = cs->cmdbytes;
 544         return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
 545 }
 546
 547 static int gigaset_chars_in_buffer(struct cardstate *cs)
 548 {
 549         return cs->cmdbytes;
 550 }
 551
 552 /*
 553  * set the break characters on the internal serial adapter
 554  * using undocumented device commands reverse engineered from USB traces
 555  * of the Siemens Windows driver
 556  */
 557 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
 558 {
 559         struct usb_device *udev = cs->hw.usb->udev;
 560
 561         gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
 562         memcpy(cs->hw.usb->bchars, buf, 6);
 563         return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
 564                                0, 0, &buf, 6, 2000);
 565 }
 566
 567 static int gigaset_freebcshw(struct bc_state *bcs)
 568 {
 569         /* unused */
 570         return 1;
 571 }
 572
 573 /* Initialize the b-channel structure */
 574 static int gigaset_initbcshw(struct bc_state *bcs)
 575 {
 576         /* unused */
 577         bcs->hw.usb = NULL;
 578         return 1;
 579 }
 580
 581 static void gigaset_reinitbcshw(struct bc_state *bcs)
 582 {
 583         /* nothing to do for M10x */
 584 }
 585
 586 static void gigaset_freecshw(struct cardstate *cs)
 587 {
 588         tasklet_kill(&cs->write_tasklet);
 589         kfree(cs->hw.usb);
 590 }
 591
 592 static int gigaset_initcshw(struct cardstate *cs)
 593 {
 594         struct usb_cardstate *ucs;
 595
 596         cs->hw.usb = ucs =
 597                 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
 598         if (!ucs) {
 599                 pr_err("out of memory\n");
 600                 return 0;
 601         }
 602
 603         ucs->bchars[0] = 0;
 604         ucs->bchars[1] = 0;
 605         ucs->bchars[2] = 0;
 606         ucs->bchars[3] = 0;
 607         ucs->bchars[4] = 0x11;
 608         ucs->bchars[5] = 0x13;
 609         ucs->bulk_out_buffer = NULL;
 610         ucs->bulk_out_urb = NULL;
 611         ucs->read_urb = NULL;
 612         tasklet_init(&cs->write_tasklet,
 613                      gigaset_modem_fill, (unsigned long) cs);
 614
 615         return 1;
 616 }
 617
 618 /* Send data from current skb to the device. */
 619 static int write_modem(struct cardstate *cs)
 620 {
 621         int ret = 0;
 622         int count;
 623         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 624         struct usb_cardstate *ucs = cs->hw.usb;
 625         unsigned long flags;
 626
 627         gig_dbg(DEBUG_OUTPUT, "len: %d...", bcs->tx_skb->len);
 628
 629         if (!bcs->tx_skb->len) {
 630                 dev_kfree_skb_any(bcs->tx_skb);
 631                 bcs->tx_skb = NULL;
 632                 return -EINVAL;
 633         }
 634
 635         /* Copy data to bulk out buffer and transmit data */
 636         count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
 637         skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
 638         skb_pull(bcs->tx_skb, count);
 639         ucs->busy = 1;
 640         gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
 641
 642         spin_lock_irqsave(&cs->lock, flags);
 643         if (cs->connected) {
 644                 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 645                                   usb_sndbulkpipe(ucs->udev,
 646                                                   ucs->bulk_out_endpointAddr &
 647                                                   0x0f),
 648                                   ucs->bulk_out_buffer, count,
 649                                   gigaset_write_bulk_callback, cs);
 650                 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
 651         } else {
 652                 ret = -ENODEV;
 653         }
 654         spin_unlock_irqrestore(&cs->lock, flags);
 655
 656         if (ret) {
 657                 dev_err(cs->dev, "could not submit urb (error %d)\n", -ret);
 658                 ucs->busy = 0;
 659         }
 660
 661         if (!bcs->tx_skb->len) {
 662                 /* skb sent completely */
 663                 gigaset_skb_sent(bcs, bcs->tx_skb);
 664
 665                 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
 666                         (unsigned long) bcs->tx_skb);
 667                 dev_kfree_skb_any(bcs->tx_skb);
 668                 bcs->tx_skb = NULL;
 669         }
 670
 671         return ret;
 672 }
 673
 674 static int gigaset_probe(struct usb_interface *interface,
 675                          const struct usb_device_id *id)
 676 {
 677         int retval;
 678         struct usb_device *udev = interface_to_usbdev(interface);
 679         struct usb_host_interface *hostif = interface->cur_altsetting;
 680         struct cardstate *cs = NULL;
 681         struct usb_cardstate *ucs = NULL;
 682         struct usb_endpoint_descriptor *endpoint;
 683         int buffer_size;
 684
 685         gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
 686
 687         /* See if the device offered us matches what we can accept */
 688         if ((le16_to_cpu(udev->descriptor.idVendor)  != USB_M105_VENDOR_ID) ||
 689             (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
 690                 gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
 691                         le16_to_cpu(udev->descriptor.idVendor),
 692                         le16_to_cpu(udev->descriptor.idProduct));
 693                 return -ENODEV;
 694         }
 695         if (hostif->desc.bInterfaceNumber != 0) {
 696                 gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
 697                         hostif->desc.bInterfaceNumber);
 698                 return -ENODEV;
 699         }
 700         if (hostif->desc.bAlternateSetting != 0) {
 701                 dev_notice(&udev->dev, "unsupported altsetting %d - skip",
 702                            hostif->desc.bAlternateSetting);
 703                 return -ENODEV;
 704         }
 705         if (hostif->desc.bInterfaceClass != 255) {
 706                 dev_notice(&udev->dev, "unsupported interface class %d - skip",
 707                            hostif->desc.bInterfaceClass);
 708                 return -ENODEV;
 709         }
 710
 711         dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
 712
 713         /* allocate memory for our device state and intialize it */
 714         cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
 715         if (!cs)
 716                 return -ENODEV;
 717         ucs = cs->hw.usb;
 718
 719         /* save off device structure ptrs for later use */
 720         usb_get_dev(udev);
 721         ucs->udev = udev;
 722         ucs->interface = interface;
 723         cs->dev = &interface->dev;
 724
 725         /* save address of controller structure */
 726         usb_set_intfdata(interface, cs);
 727
 728         endpoint = &hostif->endpoint[0].desc;
 729
 730         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 731         ucs->bulk_out_size = buffer_size;
 732         ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
 733         ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
 734         if (!ucs->bulk_out_buffer) {
 735                 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
 736                 retval = -ENOMEM;
 737                 goto error;
 738         }
 739
 740         ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
 741         if (!ucs->bulk_out_urb) {
 742                 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
 743                 retval = -ENOMEM;
 744                 goto error;
 745         }
 746
 747         endpoint = &hostif->endpoint[1].desc;
 748
 749         ucs->busy = 0;
 750
 751         ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
 752         if (!ucs->read_urb) {
 753                 dev_err(cs->dev, "No free urbs available\n");
 754                 retval = -ENOMEM;
 755                 goto error;
 756         }
 757         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 758         ucs->rcvbuf_size = buffer_size;
 759         ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
 760         ucs->rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
 761         if (!ucs->rcvbuf) {
 762                 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
 763                 retval = -ENOMEM;
 764                 goto error;
 765         }
 766         /* Fill the interrupt urb and send it to the core */
 767         usb_fill_int_urb(ucs->read_urb, udev,
 768                          usb_rcvintpipe(udev,
 769                                         endpoint->bEndpointAddress & 0x0f),
 770                          ucs->rcvbuf, buffer_size,
 771                          gigaset_read_int_callback,
 772                          cs, endpoint->bInterval);
 773
 774         retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
 775         if (retval) {
 776                 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
 777                 goto error;
 778         }
 779
 780         /* tell common part that the device is ready */
 781         if (startmode == SM_LOCKED)
 782                 cs->mstate = MS_LOCKED;
 783
 784         if (!gigaset_start(cs)) {
 785                 tasklet_kill(&cs->write_tasklet);
 786                 retval = -ENODEV;
 787                 goto error;
 788         }
 789         return 0;
 790
 791 error:
 792         usb_kill_urb(ucs->read_urb);
 793         kfree(ucs->bulk_out_buffer);
 794         usb_free_urb(ucs->bulk_out_urb);
 795         kfree(ucs->rcvbuf);
 796         usb_free_urb(ucs->read_urb);
 797         usb_set_intfdata(interface, NULL);
 798         ucs->read_urb = ucs->bulk_out_urb = NULL;
 799         ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
 800         usb_put_dev(ucs->udev);
 801         ucs->udev = NULL;
 802         ucs->interface = NULL;
 803         gigaset_freecs(cs);
 804         return retval;
 805 }
 806
 807 static void gigaset_disconnect(struct usb_interface *interface)
 808 {
 809         struct cardstate *cs;
 810         struct usb_cardstate *ucs;
 811
 812         cs = usb_get_intfdata(interface);
 813         ucs = cs->hw.usb;
 814
 815         dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
 816
 817         usb_kill_urb(ucs->read_urb);
 818
 819         gigaset_stop(cs);
 820
 821         usb_set_intfdata(interface, NULL);
 822         tasklet_kill(&cs->write_tasklet);
 823
 824         usb_kill_urb(ucs->bulk_out_urb);
 825
 826         kfree(ucs->bulk_out_buffer);
 827         usb_free_urb(ucs->bulk_out_urb);
 828         kfree(ucs->rcvbuf);
 829         usb_free_urb(ucs->read_urb);
 830         ucs->read_urb = ucs->bulk_out_urb = NULL;
 831         ucs->rcvbuf = ucs->bulk_out_buffer = NULL;
 832
 833         usb_put_dev(ucs->udev);
 834         ucs->interface = NULL;
 835         ucs->udev = NULL;
 836         cs->dev = NULL;
 837         gigaset_freecs(cs);
 838 }
 839
 840 /* gigaset_suspend
 841  * This function is called before the USB connection is suspended or reset.
 842  */
 843 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
 844 {
 845         struct cardstate *cs = usb_get_intfdata(intf);
 846
 847         /* stop activity */
 848         cs->connected = 0;      /* prevent rescheduling */
 849         usb_kill_urb(cs->hw.usb->read_urb);
 850         tasklet_kill(&cs->write_tasklet);
 851         usb_kill_urb(cs->hw.usb->bulk_out_urb);
 852
 853         gig_dbg(DEBUG_SUSPEND, "suspend complete");
 854         return 0;
 855 }
 856
 857 /* gigaset_resume
 858  * This function is called after the USB connection has been resumed or reset.
 859  */
 860 static int gigaset_resume(struct usb_interface *intf)
 861 {
 862         struct cardstate *cs = usb_get_intfdata(intf);
 863         int rc;
 864
 865         /* resubmit interrupt URB */
 866         cs->connected = 1;
 867         rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
 868         if (rc) {
 869                 dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
 870                 return rc;
 871         }
 872
 873         gig_dbg(DEBUG_SUSPEND, "resume complete");
 874         return 0;
 875 }
 876
 877 /* gigaset_pre_reset
 878  * This function is called before the USB connection is reset.
 879  */
 880 static int gigaset_pre_reset(struct usb_interface *intf)
 881 {
 882         /* same as suspend */
 883         return gigaset_suspend(intf, PMSG_ON);
 884 }
 885
 886 static const struct gigaset_ops ops = {
 887         gigaset_write_cmd,
 888         gigaset_write_room,
 889         gigaset_chars_in_buffer,
 890         gigaset_brkchars,
 891         gigaset_init_bchannel,
 892         gigaset_close_bchannel,
 893         gigaset_initbcshw,
 894         gigaset_freebcshw,
 895         gigaset_reinitbcshw,
 896         gigaset_initcshw,
 897         gigaset_freecshw,
 898         gigaset_set_modem_ctrl,
 899         gigaset_baud_rate,
 900         gigaset_set_line_ctrl,
 901         gigaset_m10x_send_skb,
 902         gigaset_m10x_input,
 903 };
 904
 905 /*
 906  * This function is called while kernel-module is loaded
 907  */
 908 static int __init usb_gigaset_init(void)
 909 {
 910         int result;
 911
 912         /* allocate memory for our driver state and intialize it */
 913         driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
 914                                     GIGASET_MODULENAME, GIGASET_DEVNAME,
 915                                     &ops, THIS_MODULE);
 916         if (driver == NULL)
 917                 goto error;
 918
 919         /* register this driver with the USB subsystem */
 920         result = usb_register(&gigaset_usb_driver);
 921         if (result < 0) {
 922                 pr_err("error %d registering USB driver\n", -result);
 923                 goto error;
 924         }
 925
 926         pr_info(DRIVER_DESC "\n");
 927         return 0;
 928
 929 error:
 930         if (driver)
 931                 gigaset_freedriver(driver);
 932         driver = NULL;
 933         return -1;
 934 }
 935
 936 /*
 937  * This function is called while unloading the kernel-module
 938  */
 939 static void __exit usb_gigaset_exit(void)
 940 {
 941         int i;
 942
 943         gigaset_blockdriver(driver); /* => probe will fail
 944                                       * => no gigaset_start any more
 945                                       */
 946
 947         /* stop all connected devices */
 948         for (i = 0; i < driver->minors; i++)
 949                 gigaset_shutdown(driver->cs + i);
 950
 951         /* from now on, no isdn callback should be possible */
 952
 953         /* deregister this driver with the USB subsystem */
 954         usb_deregister(&gigaset_usb_driver);
 955         /* this will call the disconnect-callback */
 956         /* from now on, no disconnect/probe callback should be running */
 957
 958         gigaset_freedriver(driver);
 959         driver = NULL;
 960 }
 961
 962
 963 module_init(usb_gigaset_init);
 964 module_exit(usb_gigaset_exit);
 965
 966 MODULE_AUTHOR(DRIVER_AUTHOR);
 967 MODULE_DESCRIPTION(DRIVER_DESC);
 968
 969 MODULE_LICENSE("GPL");