err.no 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 static struct cardstate *cardstate = NULL;
 119
 120 /* usb specific object needed to register this driver with the usb subsystem */
 121 static struct usb_driver gigaset_usb_driver = {
 122         .name =         GIGASET_MODULENAME,
 123         .probe =        gigaset_probe,
 124         .disconnect =   gigaset_disconnect,
 125         .id_table =     gigaset_table,
 126         .suspend =      gigaset_suspend,
 127         .resume =       gigaset_resume,
 128         .reset_resume = gigaset_resume,
 129         .pre_reset =    gigaset_pre_reset,
 130         .post_reset =   gigaset_resume,
 131 };
 132
 133 struct usb_cardstate {
 134         struct usb_device       *udev;          /* usb device pointer */
 135         struct usb_interface    *interface;     /* interface for this device */
 136         atomic_t                busy;           /* bulk output in progress */
 137
 138         /* Output buffer */
 139         unsigned char           *bulk_out_buffer;
 140         int                     bulk_out_size;
 141         __u8                    bulk_out_endpointAddr;
 142         struct urb              *bulk_out_urb;
 143
 144         /* Input buffer */
 145         int                     rcvbuf_size;
 146         struct urb              *read_urb;
 147         __u8                    int_in_endpointAddr;
 148
 149         char                    bchars[6];              /* for request 0x19 */
 150 };
 151
 152 static inline unsigned tiocm_to_gigaset(unsigned state)
 153 {
 154         return ((state & TIOCM_DTR) ? 1 : 0) | ((state & TIOCM_RTS) ? 2 : 0);
 155 }
 156
 157 #ifdef CONFIG_GIGASET_UNDOCREQ
 158 /* WARNING: EXPERIMENTAL! */
 159 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
 160                                   unsigned new_state)
 161 {
 162         struct usb_device *udev = cs->hw.usb->udev;
 163         unsigned mask, val;
 164         int r;
 165
 166         mask = tiocm_to_gigaset(old_state ^ new_state);
 167         val = tiocm_to_gigaset(new_state);
 168
 169         gig_dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
 170         // don't use this in an interrupt/BH
 171         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 7, 0x41,
 172                             (val & 0xff) | ((mask & 0xff) << 8), 0,
 173                             NULL, 0, 2000 /* timeout? */);
 174         if (r < 0)
 175                 return r;
 176         //..
 177         return 0;
 178 }
 179
 180 static int set_value(struct cardstate *cs, u8 req, u16 val)
 181 {
 182         struct usb_device *udev = cs->hw.usb->udev;
 183         int r, r2;
 184
 185         gig_dbg(DEBUG_USBREQ, "request %02x (%04x)",
 186                 (unsigned)req, (unsigned)val);
 187         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x12, 0x41,
 188                             0xf /*?*/, 0, NULL, 0, 2000 /*?*/);
 189                             /* no idea what this does */
 190         if (r < 0) {
 191                 dev_err(&udev->dev, "error %d on request 0x12\n", -r);
 192                 return r;
 193         }
 194
 195         r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), req, 0x41,
 196                             val, 0, NULL, 0, 2000 /*?*/);
 197         if (r < 0)
 198                 dev_err(&udev->dev, "error %d on request 0x%02x\n",
 199                         -r, (unsigned)req);
 200
 201         r2 = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x19, 0x41,
 202                              0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
 203         if (r2 < 0)
 204                 dev_err(&udev->dev, "error %d on request 0x19\n", -r2);
 205
 206         return r < 0 ? r : (r2 < 0 ? r2 : 0);
 207 }
 208
 209 /* WARNING: HIGHLY EXPERIMENTAL! */
 210 // don't use this in an interrupt/BH
 211 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
 212 {
 213         u16 val;
 214         u32 rate;
 215
 216         cflag &= CBAUD;
 217
 218         switch (cflag) {
 219         //FIXME more values?
 220         case    B300: rate =     300; break;
 221         case    B600: rate =     600; break;
 222         case   B1200: rate =    1200; break;
 223         case   B2400: rate =    2400; break;
 224         case   B4800: rate =    4800; break;
 225         case   B9600: rate =    9600; break;
 226         case  B19200: rate =   19200; break;
 227         case  B38400: rate =   38400; break;
 228         case  B57600: rate =   57600; break;
 229         case B115200: rate =  115200; break;
 230         default:
 231                 rate =  9600;
 232                 dev_err(cs->dev, "unsupported baudrate request 0x%x,"
 233                         " using default of B9600\n", cflag);
 234         }
 235
 236         val = 0x383fff / rate + 1;
 237
 238         return set_value(cs, 1, val);
 239 }
 240
 241 /* WARNING: HIGHLY EXPERIMENTAL! */
 242 // don't use this in an interrupt/BH
 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 */ //FIXME is this okay?
 271                 else
 272                         val |= 2; /* 2 stop bits */
 273         }
 274
 275         return set_value(cs, 3, val);
 276 }
 277
 278 #else
 279 static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
 280                                   unsigned new_state)
 281 {
 282         return -EINVAL;
 283 }
 284
 285 static int gigaset_set_line_ctrl(struct cardstate *cs, unsigned cflag)
 286 {
 287         return -EINVAL;
 288 }
 289
 290 static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
 291 {
 292         return -EINVAL;
 293 }
 294 #endif
 295
 296
 297  /*================================================================================================================*/
 298 static int gigaset_init_bchannel(struct bc_state *bcs)
 299 {
 300         /* nothing to do for M10x */
 301         gigaset_bchannel_up(bcs);
 302         return 0;
 303 }
 304
 305 static int gigaset_close_bchannel(struct bc_state *bcs)
 306 {
 307         /* nothing to do for M10x */
 308         gigaset_bchannel_down(bcs);
 309         return 0;
 310 }
 311
 312 static int write_modem(struct cardstate *cs);
 313 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
 314
 315
 316 /* Write tasklet handler: Continue sending current skb, or send command, or
 317  * start sending an skb from the send queue.
 318  */
 319 static void gigaset_modem_fill(unsigned long data)
 320 {
 321         struct cardstate *cs = (struct cardstate *) data;
 322         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 323         struct cmdbuf_t *cb;
 324         int again;
 325
 326         gig_dbg(DEBUG_OUTPUT, "modem_fill");
 327
 328         if (atomic_read(&cs->hw.usb->busy)) {
 329                 gig_dbg(DEBUG_OUTPUT, "modem_fill: busy");
 330                 return;
 331         }
 332
 333         do {
 334                 again = 0;
 335                 if (!bcs->tx_skb) { /* no skb is being sent */
 336                         cb = cs->cmdbuf;
 337                         if (cb) { /* commands to send? */
 338                                 gig_dbg(DEBUG_OUTPUT, "modem_fill: cb");
 339                                 if (send_cb(cs, cb) < 0) {
 340                                         gig_dbg(DEBUG_OUTPUT,
 341                                                 "modem_fill: send_cb failed");
 342                                         again = 1; /* no callback will be
 343                                                       called! */
 344                                 }
 345                         } else { /* skbs to send? */
 346                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
 347                                 if (bcs->tx_skb)
 348                                         gig_dbg(DEBUG_INTR,
 349                                                 "Dequeued skb (Adr: %lx)!",
 350                                                 (unsigned long) bcs->tx_skb);
 351                         }
 352                 }
 353
 354                 if (bcs->tx_skb) {
 355                         gig_dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
 356                         if (write_modem(cs) < 0) {
 357                                 gig_dbg(DEBUG_OUTPUT,
 358                                         "modem_fill: write_modem failed");
 359                                 // FIXME should we tell the LL?
 360                                 again = 1; /* no callback will be called! */
 361                         }
 362                 }
 363         } while (again);
 364 }
 365
 366 /**
 367  *      gigaset_read_int_callback
 368  *
 369  *      It is called if the data was received from the device.
 370  */
 371 static void gigaset_read_int_callback(struct urb *urb)
 372 {
 373         struct inbuf_t *inbuf = urb->context;
 374         struct cardstate *cs = inbuf->cs;
 375         int status = urb->status;
 376         int r;
 377         unsigned numbytes;
 378         unsigned char *src;
 379         unsigned long flags;
 380
 381         if (!status) {
 382                 numbytes = urb->actual_length;
 383
 384                 if (numbytes) {
 385                         src = inbuf->rcvbuf;
 386                         if (unlikely(*src))
 387                                 dev_warn(cs->dev,
 388                                     "%s: There was no leading 0, but 0x%02x!\n",
 389                                          __func__, (unsigned) *src);
 390                         ++src; /* skip leading 0x00 */
 391                         --numbytes;
 392                         if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
 393                                 gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
 394                                 gigaset_schedule_event(inbuf->cs);
 395                         }
 396                 } else
 397                         gig_dbg(DEBUG_INTR, "Received zero block length");
 398         } else {
 399                 /* The urb might have been killed. */
 400                 gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
 401                         __func__, status);
 402                 if (status == -ENOENT || status == -ESHUTDOWN)
 403                         /* killed or endpoint shutdown: don't resubmit */
 404                         return;
 405         }
 406
 407         /* resubmit URB */
 408         spin_lock_irqsave(&cs->lock, flags);
 409         if (!cs->connected) {
 410                 spin_unlock_irqrestore(&cs->lock, flags);
 411                 err("%s: disconnected", __func__);
 412                 return;
 413         }
 414         r = usb_submit_urb(urb, GFP_ATOMIC);
 415         spin_unlock_irqrestore(&cs->lock, flags);
 416         if (r)
 417                 dev_err(cs->dev, "error %d resubmitting URB\n", -r);
 418 }
 419
 420
 421 /* This callback routine is called when data was transmitted to the device. */
 422 static void gigaset_write_bulk_callback(struct urb *urb)
 423 {
 424         struct cardstate *cs = urb->context;
 425         int status = urb->status;
 426         unsigned long flags;
 427
 428         switch (status) {
 429         case 0:                 /* normal completion */
 430                 break;
 431         case -ENOENT:           /* killed */
 432                 gig_dbg(DEBUG_ANY, "%s: killed", __func__);
 433                 atomic_set(&cs->hw.usb->busy, 0);
 434                 return;
 435         default:
 436                 dev_err(cs->dev, "bulk transfer failed (status %d)\n",
 437                         -status);
 438                 /* That's all we can do. Communication problems
 439                    are handled by timeouts or network protocols. */
 440         }
 441
 442         spin_lock_irqsave(&cs->lock, flags);
 443         if (!cs->connected) {
 444                 err("%s: not connected", __func__);
 445         } else {
 446                 atomic_set(&cs->hw.usb->busy, 0);
 447                 tasklet_schedule(&cs->write_tasklet);
 448         }
 449         spin_unlock_irqrestore(&cs->lock, flags);
 450 }
 451
 452 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
 453 {
 454         struct cmdbuf_t *tcb;
 455         unsigned long flags;
 456         int count;
 457         int status = -ENOENT; // FIXME
 458         struct usb_cardstate *ucs = cs->hw.usb;
 459
 460         do {
 461                 if (!cb->len) {
 462                         tcb = cb;
 463
 464                         spin_lock_irqsave(&cs->cmdlock, flags);
 465                         cs->cmdbytes -= cs->curlen;
 466                         gig_dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
 467                                 cs->curlen, cs->cmdbytes);
 468                         cs->cmdbuf = cb = cb->next;
 469                         if (cb) {
 470                                 cb->prev = NULL;
 471                                 cs->curlen = cb->len;
 472                         } else {
 473                                 cs->lastcmdbuf = NULL;
 474                                 cs->curlen = 0;
 475                         }
 476                         spin_unlock_irqrestore(&cs->cmdlock, flags);
 477
 478                         if (tcb->wake_tasklet)
 479                                 tasklet_schedule(tcb->wake_tasklet);
 480                         kfree(tcb);
 481                 }
 482                 if (cb) {
 483                         count = min(cb->len, ucs->bulk_out_size);
 484                         gig_dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
 485
 486                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 487                                           usb_sndbulkpipe(ucs->udev,
 488                                              ucs->bulk_out_endpointAddr & 0x0f),
 489                                           cb->buf + cb->offset, count,
 490                                           gigaset_write_bulk_callback, cs);
 491
 492                         cb->offset += count;
 493                         cb->len -= count;
 494                         atomic_set(&ucs->busy, 1);
 495
 496                         spin_lock_irqsave(&cs->lock, flags);
 497                         status = cs->connected ? usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC) : -ENODEV;
 498                         spin_unlock_irqrestore(&cs->lock, flags);
 499
 500                         if (status) {
 501                                 atomic_set(&ucs->busy, 0);
 502                                 err("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(atomic_read(&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 -EINVAL;
 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                 return 0;
 617
 618         ucs->bchars[0] = 0;
 619         ucs->bchars[1] = 0;
 620         ucs->bchars[2] = 0;
 621         ucs->bchars[3] = 0;
 622         ucs->bchars[4] = 0x11;
 623         ucs->bchars[5] = 0x13;
 624         ucs->bulk_out_buffer = NULL;
 625         ucs->bulk_out_urb = NULL;
 626         //ucs->urb_cmd_out = NULL;
 627         ucs->read_urb = NULL;
 628         tasklet_init(&cs->write_tasklet,
 629                      &gigaset_modem_fill, (unsigned long) cs);
 630
 631         return 1;
 632 }
 633
 634 /* Send data from current skb to the device. */
 635 static int write_modem(struct cardstate *cs)
 636 {
 637         int ret = 0;
 638         int count;
 639         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 640         struct usb_cardstate *ucs = cs->hw.usb;
 641         unsigned long flags;
 642
 643         gig_dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
 644
 645         if (!bcs->tx_skb->len) {
 646                 dev_kfree_skb_any(bcs->tx_skb);
 647                 bcs->tx_skb = NULL;
 648                 return -EINVAL;
 649         }
 650
 651         /* Copy data to bulk out buffer and  // FIXME copying not necessary
 652          * transmit data
 653          */
 654         count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
 655         skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
 656         skb_pull(bcs->tx_skb, count);
 657         atomic_set(&ucs->busy, 1);
 658         gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
 659
 660         spin_lock_irqsave(&cs->lock, flags);
 661         if (cs->connected) {
 662                 usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 663                                   usb_sndbulkpipe(ucs->udev,
 664                                                   ucs->bulk_out_endpointAddr & 0x0f),
 665                                   ucs->bulk_out_buffer, count,
 666                                   gigaset_write_bulk_callback, cs);
 667                 ret = usb_submit_urb(ucs->bulk_out_urb, GFP_ATOMIC);
 668         } else {
 669                 ret = -ENODEV;
 670         }
 671         spin_unlock_irqrestore(&cs->lock, flags);
 672
 673         if (ret) {
 674                 err("could not submit urb (error %d)\n", -ret);
 675                 atomic_set(&ucs->busy, 0);
 676         }
 677
 678         if (!bcs->tx_skb->len) {
 679                 /* skb sent completely */
 680                 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
 681
 682                 gig_dbg(DEBUG_INTR, "kfree skb (Adr: %lx)!",
 683                         (unsigned long) bcs->tx_skb);
 684                 dev_kfree_skb_any(bcs->tx_skb);
 685                 bcs->tx_skb = NULL;
 686         }
 687
 688         return ret;
 689 }
 690
 691 static int gigaset_probe(struct usb_interface *interface,
 692                          const struct usb_device_id *id)
 693 {
 694         int retval;
 695         struct usb_device *udev = interface_to_usbdev(interface);
 696         struct usb_host_interface *hostif = interface->cur_altsetting;
 697         struct cardstate *cs = NULL;
 698         struct usb_cardstate *ucs = NULL;
 699         struct usb_endpoint_descriptor *endpoint;
 700         int buffer_size;
 701
 702         gig_dbg(DEBUG_ANY, "%s: Check if device matches ...", __func__);
 703
 704         /* See if the device offered us matches what we can accept */
 705         if ((le16_to_cpu(udev->descriptor.idVendor)  != USB_M105_VENDOR_ID) ||
 706             (le16_to_cpu(udev->descriptor.idProduct) != USB_M105_PRODUCT_ID)) {
 707                 gig_dbg(DEBUG_ANY, "device ID (0x%x, 0x%x) not for me - skip",
 708                         le16_to_cpu(udev->descriptor.idVendor),
 709                         le16_to_cpu(udev->descriptor.idProduct));
 710                 return -ENODEV;
 711         }
 712         if (hostif->desc.bInterfaceNumber != 0) {
 713                 gig_dbg(DEBUG_ANY, "interface %d not for me - skip",
 714                         hostif->desc.bInterfaceNumber);
 715                 return -ENODEV;
 716         }
 717         if (hostif->desc.bAlternateSetting != 0) {
 718                 dev_notice(&udev->dev, "unsupported altsetting %d - skip",
 719                            hostif->desc.bAlternateSetting);
 720                 return -ENODEV;
 721         }
 722         if (hostif->desc.bInterfaceClass != 255) {
 723                 dev_notice(&udev->dev, "unsupported interface class %d - skip",
 724                            hostif->desc.bInterfaceClass);
 725                 return -ENODEV;
 726         }
 727
 728         dev_info(&udev->dev, "%s: Device matched ... !\n", __func__);
 729
 730         cs = gigaset_getunassignedcs(driver);
 731         if (!cs) {
 732                 dev_warn(&udev->dev, "no free cardstate\n");
 733                 return -ENODEV;
 734         }
 735         ucs = cs->hw.usb;
 736
 737         /* save off device structure ptrs for later use */
 738         usb_get_dev(udev);
 739         ucs->udev = udev;
 740         ucs->interface = interface;
 741         cs->dev = &interface->dev;
 742
 743         /* save address of controller structure */
 744         usb_set_intfdata(interface, cs); // dev_set_drvdata(&interface->dev, cs);
 745
 746         endpoint = &hostif->endpoint[0].desc;
 747
 748         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 749         ucs->bulk_out_size = buffer_size;
 750         ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
 751         ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
 752         if (!ucs->bulk_out_buffer) {
 753                 dev_err(cs->dev, "Couldn't allocate bulk_out_buffer\n");
 754                 retval = -ENOMEM;
 755                 goto error;
 756         }
 757
 758         ucs->bulk_out_urb = usb_alloc_urb(0, GFP_KERNEL);
 759         if (!ucs->bulk_out_urb) {
 760                 dev_err(cs->dev, "Couldn't allocate bulk_out_urb\n");
 761                 retval = -ENOMEM;
 762                 goto error;
 763         }
 764
 765         endpoint = &hostif->endpoint[1].desc;
 766
 767         atomic_set(&ucs->busy, 0);
 768
 769         ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
 770         if (!ucs->read_urb) {
 771                 dev_err(cs->dev, "No free urbs available\n");
 772                 retval = -ENOMEM;
 773                 goto error;
 774         }
 775         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 776         ucs->rcvbuf_size = buffer_size;
 777         ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
 778         cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
 779         if (!cs->inbuf[0].rcvbuf) {
 780                 dev_err(cs->dev, "Couldn't allocate rcvbuf\n");
 781                 retval = -ENOMEM;
 782                 goto error;
 783         }
 784         /* Fill the interrupt urb and send it to the core */
 785         usb_fill_int_urb(ucs->read_urb, udev,
 786                          usb_rcvintpipe(udev,
 787                                         endpoint->bEndpointAddress & 0x0f),
 788                          cs->inbuf[0].rcvbuf, buffer_size,
 789                          gigaset_read_int_callback,
 790                          cs->inbuf + 0, endpoint->bInterval);
 791
 792         retval = usb_submit_urb(ucs->read_urb, GFP_KERNEL);
 793         if (retval) {
 794                 dev_err(cs->dev, "Could not submit URB (error %d)\n", -retval);
 795                 goto error;
 796         }
 797
 798         /* tell common part that the device is ready */
 799         if (startmode == SM_LOCKED)
 800                 atomic_set(&cs->mstate, MS_LOCKED);
 801
 802         if (!gigaset_start(cs)) {
 803                 tasklet_kill(&cs->write_tasklet);
 804                 retval = -ENODEV; //FIXME
 805                 goto error;
 806         }
 807         return 0;
 808
 809 error:
 810         usb_kill_urb(ucs->read_urb);
 811         kfree(ucs->bulk_out_buffer);
 812         usb_free_urb(ucs->bulk_out_urb);
 813         kfree(cs->inbuf[0].rcvbuf);
 814         usb_free_urb(ucs->read_urb);
 815         usb_set_intfdata(interface, NULL);
 816         ucs->read_urb = ucs->bulk_out_urb = NULL;
 817         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
 818         usb_put_dev(ucs->udev);
 819         ucs->udev = NULL;
 820         ucs->interface = NULL;
 821         gigaset_unassign(cs);
 822         return retval;
 823 }
 824
 825 static void gigaset_disconnect(struct usb_interface *interface)
 826 {
 827         struct cardstate *cs;
 828         struct usb_cardstate *ucs;
 829
 830         cs = usb_get_intfdata(interface);
 831         ucs = cs->hw.usb;
 832
 833         dev_info(cs->dev, "disconnecting Gigaset USB adapter\n");
 834
 835         usb_kill_urb(ucs->read_urb);
 836
 837         gigaset_stop(cs);
 838
 839         usb_set_intfdata(interface, NULL);
 840         tasklet_kill(&cs->write_tasklet);
 841
 842         usb_kill_urb(ucs->bulk_out_urb);
 843
 844         kfree(ucs->bulk_out_buffer);
 845         usb_free_urb(ucs->bulk_out_urb);
 846         kfree(cs->inbuf[0].rcvbuf);
 847         usb_free_urb(ucs->read_urb);
 848         ucs->read_urb = ucs->bulk_out_urb = NULL;
 849         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
 850
 851         usb_put_dev(ucs->udev);
 852         ucs->interface = NULL;
 853         ucs->udev = NULL;
 854         cs->dev = NULL;
 855         gigaset_unassign(cs);
 856 }
 857
 858 /* gigaset_suspend
 859  * This function is called before the USB connection is suspended or reset.
 860  */
 861 static int gigaset_suspend(struct usb_interface *intf, pm_message_t message)
 862 {
 863         struct cardstate *cs = usb_get_intfdata(intf);
 864
 865         /* stop activity */
 866         cs->connected = 0;      /* prevent rescheduling */
 867         usb_kill_urb(cs->hw.usb->read_urb);
 868         tasklet_kill(&cs->write_tasklet);
 869         usb_kill_urb(cs->hw.usb->bulk_out_urb);
 870
 871         gig_dbg(DEBUG_SUSPEND, "suspend complete");
 872         return 0;
 873 }
 874
 875 /* gigaset_resume
 876  * This function is called after the USB connection has been resumed or reset.
 877  */
 878 static int gigaset_resume(struct usb_interface *intf)
 879 {
 880         struct cardstate *cs = usb_get_intfdata(intf);
 881         int rc;
 882
 883         /* resubmit interrupt URB */
 884         cs->connected = 1;
 885         rc = usb_submit_urb(cs->hw.usb->read_urb, GFP_KERNEL);
 886         if (rc) {
 887                 dev_err(cs->dev, "Could not submit read URB (error %d)\n", -rc);
 888                 return rc;
 889         }
 890
 891         gig_dbg(DEBUG_SUSPEND, "resume complete");
 892         return 0;
 893 }
 894
 895 /* gigaset_pre_reset
 896  * This function is called before the USB connection is reset.
 897  */
 898 static int gigaset_pre_reset(struct usb_interface *intf)
 899 {
 900         /* same as suspend */
 901         return gigaset_suspend(intf, PMSG_ON);
 902 }
 903
 904 static const struct gigaset_ops ops = {
 905         gigaset_write_cmd,
 906         gigaset_write_room,
 907         gigaset_chars_in_buffer,
 908         gigaset_brkchars,
 909         gigaset_init_bchannel,
 910         gigaset_close_bchannel,
 911         gigaset_initbcshw,
 912         gigaset_freebcshw,
 913         gigaset_reinitbcshw,
 914         gigaset_initcshw,
 915         gigaset_freecshw,
 916         gigaset_set_modem_ctrl,
 917         gigaset_baud_rate,
 918         gigaset_set_line_ctrl,
 919         gigaset_m10x_send_skb,
 920         gigaset_m10x_input,
 921 };
 922
 923 /**
 924  *      usb_gigaset_init
 925  * This function is called while kernel-module is loaded
 926  */
 927 static int __init usb_gigaset_init(void)
 928 {
 929         int result;
 930
 931         /* allocate memory for our driver state and intialize it */
 932         if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
 933                                        GIGASET_MODULENAME, GIGASET_DEVNAME,
 934                                        &ops, THIS_MODULE)) == NULL)
 935                 goto error;
 936
 937         /* allocate memory for our device state and intialize it */
 938         cardstate = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
 939         if (!cardstate)
 940                 goto error;
 941
 942         /* register this driver with the USB subsystem */
 943         result = usb_register(&gigaset_usb_driver);
 944         if (result < 0) {
 945                 err("usb_gigaset: usb_register failed (error %d)",
 946                     -result);
 947                 goto error;
 948         }
 949
 950         info(DRIVER_AUTHOR);
 951         info(DRIVER_DESC);
 952         return 0;
 953
 954 error:  if (cardstate)
 955                 gigaset_freecs(cardstate);
 956         cardstate = NULL;
 957         if (driver)
 958                 gigaset_freedriver(driver);
 959         driver = NULL;
 960         return -1;
 961 }
 962
 963
 964 /**
 965  *      usb_gigaset_exit
 966  * This function is called while unloading the kernel-module
 967  */
 968 static void __exit usb_gigaset_exit(void)
 969 {
 970         gigaset_blockdriver(driver); /* => probe will fail
 971                                       * => no gigaset_start any more
 972                                       */
 973
 974         gigaset_shutdown(cardstate);
 975         /* from now on, no isdn callback should be possible */
 976
 977         /* deregister this driver with the USB subsystem */
 978         usb_deregister(&gigaset_usb_driver);
 979         /* this will call the disconnect-callback */
 980         /* from now on, no disconnect/probe callback should be running */
 981
 982         gigaset_freecs(cardstate);
 983         cardstate = NULL;
 984         gigaset_freedriver(driver);
 985         driver = NULL;
 986 }
 987
 988
 989 module_init(usb_gigaset_init);
 990 module_exit(usb_gigaset_exit);
 991
 992 MODULE_AUTHOR(DRIVER_AUTHOR);
 993 MODULE_DESCRIPTION(DRIVER_DESC);
 994
 995 MODULE_LICENSE("GPL");