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 /* functions called if a device of this driver is connected/disconnected */
 108 static int gigaset_probe(struct usb_interface *interface,
 109                          const struct usb_device_id *id);
 110 static void gigaset_disconnect(struct usb_interface *interface);
 111
 112 /* functions called before/after suspend */
 113 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message);
 114 static int gigaset_resume(struct usb_interface *intf);
 115 static int gigaset_pre_reset(struct usb_interface *intf);
 116
 117 static struct gigaset_driver *driver = NULL;
 118
 119 /* usb specific object needed to register this driver with the usb subsystem */
 120 static struct usb_driver gigaset_usb_driver = {
 121         .name =         GIGASET_MODULENAME,
 122         .probe =        gigaset_probe,
 123         .disconnect =   gigaset_disconnect,
 124         .id_table =     gigaset_table,
 125         .suspend =      gigaset_suspend,
 126         .resume =       gigaset_resume,
 127         .reset_resume = gigaset_resume,
 128         .pre_reset =    gigaset_pre_reset,
 129         .post_reset =   gigaset_resume,
 130 };
 131
 132 struct usb_cardstate {
 133         struct usb_device       *udev;          /* usb device pointer */
 134         struct usb_interface    *interface;     /* interface for this device */
 135         int                     busy;           /* bulk output in progress */
 136
 137         /* Output buffer */
 138         unsigned char           *bulk_out_buffer;
 139         int                     bulk_out_size;
 140         __u8                    bulk_out_endpointAddr;
 141         struct urb              *bulk_out_urb;
 142
 143         /* Input buffer */
 144         int                     rcvbuf_size;
 145         struct urb              *read_urb;
 146         __u8                    int_in_endpointAddr;
 147
 148         char                    bchars[6];              /* for request 0x19 */
 149 };
 150
 151 static inline unsigned tiocm_to_gigaset(unsigned state)
 152 {
 153         return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
 154 }
 155
 156 #ifdef CONFIG_GIGASET_UNDOCREQ
 157 /* WARNING: EXPERIMENTAL! */
 158 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
 159                                   unsigned new_state)
 160 {
 161         struct usb_device *udev = cs->hw.usb->udev;
 162         unsigned mask, val;
 163         int r;
 164
 165         mask = tiocm_to_gigaset(old_state ^ new_state);
 166         val = tiocm_to_gigaset(new_state);
 167
 168         gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
 169         // don't use this in an interrupt/BH
 170         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
 171                             (val & 0xff) | ((mask & 0xff) << 8), 0,
 172                             NULL, 0, 2000 /* timeout? */);
 173         if (r < 0)
 174                 return r;
 175         //..
 176         return 0;
 177 }
 178
 179 static int set_value(struct cardstate *cs, u8 req, u16 val)
 180 {
 181         struct usb_device *udev = cs->hw.usb->udev;
 182         int r, r2;
 183
 184         gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
 185                 (unsigned)req, (unsigned)val);
 186         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
 187                             0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
 188                             /* no idea what this does */
 189         if (r < 0) {
 190                 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
 191                 return r;
 192         }
 193
 194         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
 195                             val, 0, NULL, 0, 2000 /*?*/);
 196         if (r < 0)
 197                 dev_err(&udev->dev, "error %d on request 0x%02x\n",
 198                         -r, (unsigned)req);
 199
 200         r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
 201                              0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
 202         if (r2 < 0)
 203                 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
 204
 205         return r < 0 ? r : (r2 < 0 ? r2 : 0);
 206 }
 207
 208 /* WARNING: HIGHLY EXPERIMENTAL! */
 209 // don't use this in an interrupt/BH
 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         //FIXME more values?
 219         case    B300: rate =     300; break;
 220         case    B600: rate =     600; break;
 221         case   B1200: rate =    1200; break;
 222         case   B2400: rate =    2400; break;
 223         case   B4800: rate =    4800; break;
 224         case   B9600: rate =    9600; break;
 225         case  B19200: rate =   19200; break;
 226         case  B38400: rate =   38400; break;
 227         case  B57600: rate =   57600; break;
 228         case B115200: rate =  115200; break;
 229         default:
 230                 rate =  9600;
 231                 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
 232                         " using default of B9600\n", cflag);
 233         }
 234
 235         val = 0x383fff / rate + 1;
 236
 237         return set_value(cs, 1, val);
 238 }
 239
 240 /* WARNING: HIGHLY EXPERIMENTAL! */
 241 // don't use this in an interrupt/BH
 242 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
 243 {
 244         u16 val = 0;
 245
 246         /* set the parity */
 247         if (cflag & PARENB)
 248                 val |= (cflag & PARODD) ? 0x10 : 0x20;
 249
 250         /* set the number of data bits */
 251         switch (cflag & CSIZE) {
 252         case CS5:
 253                 val |= 5 << 8; break;
 254         case CS6:
 255                 val |= 6 << 8; break;
 256         case CS7:
 257                 val |= 7 << 8; break;
 258         case CS8:
 259                 val |= 8 << 8; break;
 260         default:
 261                 dev_err(cs->dev, "CSIZE was not CS5-CS8, using default of 8\n");
 262                 val |= 8 << 8;
 263                 break;
 264         }
 265
 266         /* set the number of stop bits */
 267         if (cflag & CSTOPB) {
 268                 if ((cflag & CSIZE) == CS5)
 269                         val |= 1; /* 1.5 stop bits */ //FIXME is this okay?
 270                 else
 271                         val |= 2; /* 2 stop bits */
 272         }
 273
 274         return set_value(cs, 3, val);
 275 }
 276
 277 #else
 278 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
 279                                   unsigned new_state)
 280 {
 281         return -ENOTTY;
 282 }
 283
 284 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
 285 {
 286         return -ENOTTY;
 287 }
 288
 289 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
 290 {
 291         return -ENOTTY;
 292 }
 293 #endif
 294
 295
 296  /*================================================================================================================*/
 297 static int gigaset_init_bchannel(struct bc_state *bcs)
 298 {
 299         /* nothing to do for M10x */
 300         gigaset_bchannel_up(bcs);
 301         return 0;
 302 }
 303
 304 static int gigaset_close_bchannel(struct bc_state *bcs)
 305 {
 306         /* nothing to do for M10x */
 307         gigaset_bchannel_down(bcs);
 308         return 0;
 309 }
 310
 311 static int write_modem(struct cardstate *cs);
 312 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
 313
 314
 315 /* Write tasklet handler: Continue sending current skb, or send command, or
 316  * start sending an skb from the send queue.
 317  */
 318 static void gigaset_modem_fill(unsigned long data)
 319 {
 320         struct cardstate *cs = (struct cardstate *) data;
 321         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 322         struct cmdbuf_t *cb;
 323         int again;
 324
 325         gig_dbg(DEBUG_OUTPUT, "modem_fill");
 326
 327         if (cs->hw.usb->busy) {
 328                 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
 329                 return;
 330         }
 331
 332         do {
 333                 again = 0;
 334                 if (!bcs->tx_skb) { /* no skb is being sent */
 335                         cb = cs->cmdbuf;
 336                         if (cb) { /* commands to send? */
 337                                 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
 338                                 if (send_cb(cs, cb) < 0) {
 339                                         gig_dbg(DEBUG_OUTPUT,
 340                                                 "modem_fill: send_cb failed");
 341                                         again = 1; /* no callback will be
 342                                                       called! */
 343                                 }
 344                         } else { /* skbs to send? */
 345                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
 346                                 if (bcs->tx_skb)
 347                                         gig_dbg(DEBUG_INTR,
 348                                                 "Dequeued skb (Adr: %lx)!",
 349                                                 (unsigned long) bcs->tx_skb);
 350                         }
 351                 }
 352
 353                 if (bcs->tx_skb) {
 354                         gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
 355                         if (write_modem(cs) < 0) {
 356                                 gig_dbg(DEBUG_OUTPUT,
 357                                         "modem_fill: write_modem failed");
 358                                 // FIXME should we tell the LL?
 359                                 again = 1; /* no callback will be called! */
 360                         }
 361                 }
 362         } while (again);
 363 }
 364
 365 /**
 366  *      gigaset_read_int_callback
 367  *
 368  *      It is called if the data was received from the device.
 369  */
 370 static void gigaset_read_int_callback(struct urb *urb)
 371 {
 372         struct inbuf_t *inbuf = urb->context;
 373         struct cardstate *cs = inbuf->cs;
 374         int status = urb->status;
 375         int r;
 376         unsigned numbytes;
 377         unsigned char *src;
 378         unsigned long flags;
 379
 380         if (!status) {
 381                 numbytes = urb->actual_length;
 382
 383                 if (numbytes) {
 384                         src = inbuf->rcvbuf;
 385                         if (unlikely(*src))
 386                                 dev_warn(cs->dev,
 387                                     "%s: There was no leading 0, but 0x%02x!\n",
 388                                          __func__, (unsigned) *src);
 389                         ++src; /* skip leading 0x00 */
 390                         --numbytes;
 391                         if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
 392                                 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
 393                                 gigaset_schedule_event(inbuf->cs);
 394                         }
 395                 } else
 396                         gig_dbg(DEBUG_INTR, "Received zero block length");
 397         } else {
 398                 /* The urb might have been killed. */
 399                 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
 400                         __func__, status);
 401                 if (status == -ENOENT || status == -ESHUTDOWN)
 402                         /* killed or endpoint shutdown: don't resubmit */
 403                         return;
 404         }
 405
 406         /* resubmit URB */
 407         spin_lock_irqsave(&cs->lock, flags);
 408         if (!cs->connected) {
 409                 spin_unlock_irqrestore(&cs->lock, flags);
 410                 pr_err("%s: disconnected\n", __func__);
 411                 return;
 412         }
 413         r = usb_submit_urb(urb, GFP_ATOMIC);
 414         spin_unlock_irqrestore(&cs->lock, flags);
 415         if (r)
 416                 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
 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         int status = urb->status;
 425         unsigned long flags;
 426
 427         switch (status) {
 428         case 0:                 /* normal completion */
 429                 break;
 430         case -ENOENT:           /* killed */
 431                 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
 432                 cs->hw.usb->busy = 0;
 433                 return;
 434         default:
 435                 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
 436                         -status);
 437                 /* That's all we can do. Communication problems
 438                    are handled by timeouts or network protocols. */
 439         }
 440
 441         spin_lock_irqsave(&cs->lock, flags);
 442         if (!cs->connected) {
 443                 pr_err("%s: disconnected\n", __func__);
 444         } else {
 445                 cs->hw.usb->busy = 0;
 446                 tasklet_schedule(&cs->write_tasklet);
 447         }
 448         spin_unlock_irqrestore(&cs->lock, flags);
 449 }
 450
 451 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
 452 {
 453         struct cmdbuf_t *tcb;
 454         unsigned long flags;
 455         int count;
 456         int status = -ENOENT; // FIXME
 457         struct usb_cardstate *ucs = cs->hw.usb;
 458
 459         do {
 460                 if (!cb->len) {
 461                         tcb = cb;
 462
 463                         spin_lock_irqsave(&cs->cmdlock, flags);
 464                         cs->cmdbytes -= cs->curlen;
 465                         gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
 466                                 cs->curlen, cs->cmdbytes);
 467                         cs->cmdbuf = cb = cb->next;
 468                         if (cb) {
 469                                 cb->prev = NULL;
 470                                 cs->curlen = cb->len;
 471                         } else {
 472                                 cs->lastcmdbuf = NULL;
 473                                 cs->curlen = 0;
 474                         }
 475                         spin_unlock_irqrestore(&cs->cmdlock, flags);
 476
 477                         if (tcb->wake_tasklet)
 478                                 tasklet_schedule(tcb->wake_tasklet);
 479                         kfree(tcb);
 480                 }
 481                 if (cb) {
 482                         count = min(cb->len, ucs->bulk_out_size);
 483                         gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
 484
 485                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 486                                           usb_sndbulkpipe(ucs->udev,
 487                                              ucs->bulk_out_endpointAddr & 0x0f),
 488                                           cb->buf + cb->offset, count,
 489                                           gigaset_write_bulk_callback, cs);
 490
 491                         cb->offset += count;
 492                         cb->len -= count;
 493                         ucs->busy = 1;
 494
 495                         spin_lock_irqsave(&cs->lock, flags);
 496                         status = cs->connected ? usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) : -ENODEV;
 497                         spin_unlock_irqrestore(&cs->lock, flags);
 498
 499                         if (status) {
 500                                 ucs->busy = 0;
 501                                 dev_err(cs->dev,
 502                                         "could not submit urb (error %d)\n",
 503                                         -status);
 504                                 cb->len = 0; /* skip urb => remove cb+wakeup
 505                                                 in next loop cycle */
 506                         }
 507                 }
 508         } while (cb && status); /* next command on error */
 509
 510         return status;
 511 }
 512
 513 /* Send command to device. */
 514 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
 515                              int len, struct tasklet_struct *wake_tasklet)
 516 {
 517         struct cmdbuf_t *cb;
 518         unsigned long flags;
 519
 520         gigaset_dbg_buffer(cs->mstate != MS_LOCKED ?
 521                              DEBUG_TRANSCMD : DEBUG_LOCKCMD,
 522                            "CMD Transmit", len, buf);
 523
 524         if (len <= 0)
 525                 return 0;
 526
 527         if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
 528                 dev_err(cs->dev, "%s: out of memory\n", __func__);
 529                 return -ENOMEM;
 530         }
 531
 532         memcpy(cb->buf, buf, len);
 533         cb->len = len;
 534         cb->offset = 0;
 535         cb->next = NULL;
 536         cb->wake_tasklet = wake_tasklet;
 537
 538         spin_lock_irqsave(&cs->cmdlock, flags);
 539         cb->prev = cs->lastcmdbuf;
 540         if (cs->lastcmdbuf)
 541                 cs->lastcmdbuf->next = cb;
 542         else {
 543                 cs->cmdbuf = cb;
 544                 cs->curlen = len;
 545         }
 546         cs->cmdbytes += len;
 547         cs->lastcmdbuf = cb;
 548         spin_unlock_irqrestore(&cs->cmdlock, flags);
 549
 550         spin_lock_irqsave(&cs->lock, flags);
 551         if (cs->connected)
 552                 tasklet_schedule(&cs->write_tasklet);
 553         spin_unlock_irqrestore(&cs->lock, flags);
 554         return len;
 555 }
 556
 557 static int gigaset_write_room(struct cardstate *cs)
 558 {
 559         unsigned bytes;
 560
 561         bytes = cs->cmdbytes;
 562         return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
 563 }
 564
 565 static int gigaset_chars_in_buffer(struct cardstate *cs)
 566 {
 567         return cs->cmdbytes;
 568 }
 569
 570 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
 571 {
 572 #ifdef CONFIG_GIGASET_UNDOCREQ
 573         struct usb_device *udev = cs->hw.usb->udev;
 574
 575         gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf);
 576         memcpy(cs->hw.usb->bchars, buf, 6);
 577         return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
 578                                0, 0, &buf, 6, 2000);
 579 #else
 580         return -ENOTTY;
 581 #endif
 582 }
 583
 584 static int gigaset_freebcshw(struct bc_state *bcs)
 585 {
 586         /* unused */
 587         return 1;
 588 }
 589
 590 /* Initialize the b-channel structure */
 591 static int gigaset_initbcshw(struct bc_state *bcs)
 592 {
 593         /* unused */
 594         bcs->hw.usb = NULL;
 595         return 1;
 596 }
 597
 598 static void gigaset_reinitbcshw(struct bc_state *bcs)
 599 {
 600         /* nothing to do for M10x */
 601 }
 602
 603 static void gigaset_freecshw(struct cardstate *cs)
 604 {
 605         tasklet_kill(&cs->write_tasklet);
 606         kfree(cs->hw.usb);
 607 }
 608
 609 static int gigaset_initcshw(struct cardstate *cs)
 610 {
 611         struct usb_cardstate *ucs;
 612
 613         cs->hw.usb = ucs =
 614                 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
 615         if (!ucs) {
 616                 pr_err("out of memory\n");
 617                 return 0;
 618         }
 619
 620         ucs->bchars[0] = 0;
 621         ucs->bchars[1] = 0;
 622         ucs->bchars[2] = 0;
 623         ucs->bchars[3] = 0;
 624         ucs->bchars[4] = 0x11;
 625         ucs->bchars[5] = 0x13;
 626         ucs->bulk_out_buffer = NULL;
 627         ucs->bulk_out_urb = NULL;
 628         //ucs->urb_cmd_out = NULL;
 629         ucs->read_urb = NULL;
 630         tasklet_init(&cs->write_tasklet,
 631                      &gigaset_modem_fill, (unsigned long) cs);
 632
 633         return 1;
 634 }
 635
 636 /* Send data from current skb to the device. */
 637 static int write_modem(struct cardstate *cs)
 638 {
 639         int ret = 0;
 640         int count;
 641         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 642         struct usb_cardstate *ucs = cs->hw.usb;
 643         unsigned long flags;
 644
 645         gig_dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
 646
 647         if (!bcs->tx_skb->len) {
 648                 dev_kfree_skb_any(bcs->tx_skb);
 649                 bcs->tx_skb = NULL;
 650                 return -EINVAL;
 651         }
 652
 653         /* Copy data to bulk out buffer and  // FIXME copying not necessary
 654          * transmit data
 655          */
 656         count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
 657         skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
 658         skb_pull(bcs->tx_skb, count);
 659         ucs->busy = 1;
 660         gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
 661
 662         spin_lock_irqsave(&cs->lock, flags);
 663         if (cs->connected) {
 664                 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 665                                   usb_sndbulkpipe(ucs->udev,
 666                                                   ucs->bulk_out_endpointAddr & 0x0f),
 667                                   ucs->bulk_out_buffer, count,
 668                                   gigaset_write_bulk_callback, cs);
 669                 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
 670         } else {
 671                 ret = -ENODEV;
 672         }
 673         spin_unlock_irqrestore(&cs->lock, flags);
 674
 675         if (ret) {
 676                 dev_err(cs->dev, "could not submit urb (error %d)\n", -ret);
 677                 ucs->busy = 0;
 678         }
 679
 680         if (!bcs->tx_skb->len) {
 681                 /* skb sent completely */
 682                 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
 683
 684                 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
 685                         (unsigned long) bcs->tx_skb);
 686                 dev_kfree_skb_any(bcs->tx_skb);
 687                 bcs->tx_skb = NULL;
 688         }
 689
 690         return ret;
 691 }
 692
 693 static int gigaset_probe(struct usb_interface *interface,
 694                          const struct usb_device_id *id)
 695 {
 696         int retval;
 697         struct usb_device *udev = interface_to_usbdev(interface);
 698         struct usb_host_interface *hostif = interface->cur_altsetting;
 699         struct cardstate *cs = NULL;
 700         struct usb_cardstate *ucs = NULL;
 701         struct usb_endpoint_descriptor *endpoint;
 702         int buffer_size;
 703
 704         gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
 705
 706         /* See if the device offered us matches what we can accept */
 707         if ((le16_to_cpu(udev->descriptor.idVendor)  != USB_M105_VENDOR_ID) ||
 708             (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
 709                 gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
 710                         le16_to_cpu(udev->descriptor.idVendor),
 711                         le16_to_cpu(udev->descriptor.idProduct));
 712                 return -ENODEV;
 713         }
 714         if (hostif->desc.bInterfaceNumber != 0) {
 715                 gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
 716                         hostif->desc.bInterfaceNumber);
 717                 return -ENODEV;
 718         }
 719         if (hostif->desc.bAlternateSetting != 0) {
 720                 dev_notice(&udev->dev, "unsupported altsetting %d - skip",
 721                            hostif->desc.bAlternateSetting);
 722                 return -ENODEV;
 723         }
 724         if (hostif->desc.bInterfaceClass != 255) {
 725                 dev_notice(&udev->dev, "unsupported interface class %d - skip",
 726                            hostif->desc.bInterfaceClass);
 727                 return -ENODEV;
 728         }
 729
 730         dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
 731
 732         /* allocate memory for our device state and intialize it */
 733         cs = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
 734         if (!cs)
 735                 return -ENODEV;
 736         ucs = cs->hw.usb;
 737
 738         /* save off device structure ptrs for later use */
 739         usb_get_dev(udev);
 740         ucs->udev = udev;
 741         ucs->interface = interface;
 742         cs->dev = &interface->dev;
 743
 744         /* save address of controller structure */
 745         usb_set_intfdata(interface, cs); // dev_set_drvdata(&interface->dev, cs);
 746
 747         endpoint = &hostif->endpoint[0].desc;
 748
 749         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 750         ucs->bulk_out_size = buffer_size;
 751         ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
 752         ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
 753         if (!ucs->bulk_out_buffer) {
 754                 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
 755                 retval = -ENOMEM;
 756                 goto error;
 757         }
 758
 759         ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
 760         if (!ucs->bulk_out_urb) {
 761                 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
 762                 retval = -ENOMEM;
 763                 goto error;
 764         }
 765
 766         endpoint = &hostif->endpoint[1].desc;
 767
 768         ucs->busy = 0;
 769
 770         ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
 771         if (!ucs->read_urb) {
 772                 dev_err(cs->dev, "No free urbs available\n");
 773                 retval = -ENOMEM;
 774                 goto error;
 775         }
 776         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 777         ucs->rcvbuf_size = buffer_size;
 778         ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
 779         cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
 780         if (!cs->inbuf[0].rcvbuf) {
 781                 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
 782                 retval = -ENOMEM;
 783                 goto error;
 784         }
 785         /* Fill the interrupt urb and send it to the core */
 786         usb_fill_int_urb(ucs->read_urb, udev,
 787                          usb_rcvintpipe(udev,
 788                                         endpoint->bEndpointAddress & 0x0f),
 789                          cs->inbuf[0].rcvbuf, buffer_size,
 790                          gigaset_read_int_callback,
 791                          cs->inbuf + 0, endpoint->bInterval);
 792
 793         retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
 794         if (retval) {
 795                 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
 796                 goto error;
 797         }
 798
 799         /* tell common part that the device is ready */
 800         if (startmode == SM_LOCKED)
 801                 cs->mstate = MS_LOCKED;
 802
 803         if (!gigaset_start(cs)) {
 804                 tasklet_kill(&cs->write_tasklet);
 805                 retval = -ENODEV; //FIXME
 806                 goto error;
 807         }
 808         return 0;
 809
 810 error:
 811         usb_kill_urb(ucs->read_urb);
 812         kfree(ucs->bulk_out_buffer);
 813         usb_free_urb(ucs->bulk_out_urb);
 814         kfree(cs->inbuf[0].rcvbuf);
 815         usb_free_urb(ucs->read_urb);
 816         usb_set_intfdata(interface, NULL);
 817         ucs->read_urb = ucs->bulk_out_urb = NULL;
 818         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
 819         usb_put_dev(ucs->udev);
 820         ucs->udev = NULL;
 821         ucs->interface = NULL;
 822         gigaset_freecs(cs);
 823         return retval;
 824 }
 825
 826 static void gigaset_disconnect(struct usb_interface *interface)
 827 {
 828         struct cardstate *cs;
 829         struct usb_cardstate *ucs;
 830
 831         cs = usb_get_intfdata(interface);
 832         ucs = cs->hw.usb;
 833
 834         dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
 835
 836         usb_kill_urb(ucs->read_urb);
 837
 838         gigaset_stop(cs);
 839
 840         usb_set_intfdata(interface, NULL);
 841         tasklet_kill(&cs->write_tasklet);
 842
 843         usb_kill_urb(ucs->bulk_out_urb);
 844
 845         kfree(ucs->bulk_out_buffer);
 846         usb_free_urb(ucs->bulk_out_urb);
 847         kfree(cs->inbuf[0].rcvbuf);
 848         usb_free_urb(ucs->read_urb);
 849         ucs->read_urb = ucs->bulk_out_urb = NULL;
 850         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
 851
 852         usb_put_dev(ucs->udev);
 853         ucs->interface = NULL;
 854         ucs->udev = NULL;
 855         cs->dev = NULL;
 856         gigaset_freecs(cs);
 857 }
 858
 859 /* gigaset_suspend
 860  * This function is called before the USB connection is suspended or reset.
 861  */
 862 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
 863 {
 864         struct cardstate *cs = usb_get_intfdata(intf);
 865
 866         /* stop activity */
 867         cs->connected = 0;      /* prevent rescheduling */
 868         usb_kill_urb(cs->hw.usb->read_urb);
 869         tasklet_kill(&cs->write_tasklet);
 870         usb_kill_urb(cs->hw.usb->bulk_out_urb);
 871
 872         gig_dbg(DEBUG_SUSPEND, "suspend complete");
 873         return 0;
 874 }
 875
 876 /* gigaset_resume
 877  * This function is called after the USB connection has been resumed or reset.
 878  */
 879 static int gigaset_resume(struct usb_interface *intf)
 880 {
 881         struct cardstate *cs = usb_get_intfdata(intf);
 882         int rc;
 883
 884         /* resubmit interrupt URB */
 885         cs->connected = 1;
 886         rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
 887         if (rc) {
 888                 dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
 889                 return rc;
 890         }
 891
 892         gig_dbg(DEBUG_SUSPEND, "resume complete");
 893         return 0;
 894 }
 895
 896 /* gigaset_pre_reset
 897  * This function is called before the USB connection is reset.
 898  */
 899 static int gigaset_pre_reset(struct usb_interface *intf)
 900 {
 901         /* same as suspend */
 902         return gigaset_suspend(intf, PMSG_ON);
 903 }
 904
 905 static const struct gigaset_ops ops = {
 906         gigaset_write_cmd,
 907         gigaset_write_room,
 908         gigaset_chars_in_buffer,
 909         gigaset_brkchars,
 910         gigaset_init_bchannel,
 911         gigaset_close_bchannel,
 912         gigaset_initbcshw,
 913         gigaset_freebcshw,
 914         gigaset_reinitbcshw,
 915         gigaset_initcshw,
 916         gigaset_freecshw,
 917         gigaset_set_modem_ctrl,
 918         gigaset_baud_rate,
 919         gigaset_set_line_ctrl,
 920         gigaset_m10x_send_skb,
 921         gigaset_m10x_input,
 922 };
 923
 924 /**
 925  *      usb_gigaset_init
 926  * This function is called while kernel-module is loaded
 927  */
 928 static int __init usb_gigaset_init(void)
 929 {
 930         int result;
 931
 932         /* allocate memory for our driver state and intialize it */
 933         if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
 934                                        GIGASET_MODULENAME, GIGASET_DEVNAME,
 935                                        &ops, THIS_MODULE)) == NULL)
 936                 goto error;
 937
 938         /* register this driver with the USB subsystem */
 939         result = usb_register(&gigaset_usb_driver);
 940         if (result < 0) {
 941                 pr_err("error %d registering USB driver\n", -result);
 942                 goto error;
 943         }
 944
 945         pr_info(DRIVER_DESC "\n");
 946         return 0;
 947
 948 error:
 949         if (driver)
 950                 gigaset_freedriver(driver);
 951         driver = NULL;
 952         return -1;
 953 }
 954
 955
 956 /**
 957  *      usb_gigaset_exit
 958  * This function is called while unloading the kernel-module
 959  */
 960 static void __exit usb_gigaset_exit(void)
 961 {
 962         int i;
 963
 964         gigaset_blockdriver(driver); /* => probe will fail
 965                                       * => no gigaset_start any more
 966                                       */
 967
 968         /* stop all connected devices */
 969         for (i = 0; i < driver->minors; i++)
 970                 gigaset_shutdown(driver->cs + i);
 971
 972         /* from now on, no isdn callback should be possible */
 973
 974         /* deregister this driver with the USB subsystem */
 975         usb_deregister(&gigaset_usb_driver);
 976         /* this will call the disconnect-callback */
 977         /* from now on, no disconnect/probe callback should be running */
 978
 979         gigaset_freedriver(driver);
 980         driver = NULL;
 981 }
 982
 983
 984 module_init(usb_gigaset_init);
 985 module_exit(usb_gigaset_exit);
 986
 987 MODULE_AUTHOR(DRIVER_AUTHOR);
 988 MODULE_DESCRIPTION(DRIVER_DESC);
 989
 990 MODULE_LICENSE("GPL");