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 <Eilers.Stefan@epost.de>
   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  * ToDo: ...
  17  * =====================================================================
  18  * Version: $Id: usb-gigaset.c,v 1.85.4.18 2006/02/04 18:28:16 hjlipp Exp $
  19  * =====================================================================
  20  */
  21
  22 #include "gigaset.h"
  23
  24 #include <linux/errno.h>
  25 #include <linux/init.h>
  26 #include <linux/slab.h>
  27 #include <linux/usb.h>
  28 #include <linux/module.h>
  29 #include <linux/moduleparam.h>
  30
  31 /* Version Information */
  32 #define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers <Eilers.Stefan@epost.de>"
  33 #define DRIVER_DESC "USB Driver for Gigaset 307x using M105"
  34
  35 /* Module parameters */
  36
  37 static int startmode = SM_ISDN;
  38 static int cidmode = 1;
  39
  40 module_param(startmode, int, S_IRUGO);
  41 module_param(cidmode, int, S_IRUGO);
  42 MODULE_PARM_DESC(startmode, "start in isdn4linux mode");
  43 MODULE_PARM_DESC(cidmode, "Call-ID mode");
  44
  45 #define GIGASET_MINORS     1
  46 #define GIGASET_MINOR      8
  47 #define GIGASET_MODULENAME "usb_gigaset"
  48 #define GIGASET_DEVFSNAME  "gig/usb/"
  49 #define GIGASET_DEVNAME    "ttyGU"
  50
  51 #define IF_WRITEBUF 2000 //FIXME  // WAKEUP_CHARS: 256
  52
  53 /* Values for the Gigaset M105 Data */
  54 #define USB_M105_VENDOR_ID      0x0681
  55 #define USB_M105_PRODUCT_ID     0x0009
  56
  57 /* table of devices that work with this driver */
  58 static struct usb_device_id gigaset_table [] = {
  59         { USB_DEVICE(USB_M105_VENDOR_ID, USB_M105_PRODUCT_ID) },
  60         { }                                     /* Terminating entry */
  61 };
  62
  63 MODULE_DEVICE_TABLE(usb, gigaset_table);
  64
  65 /* Get a minor range for your devices from the usb maintainer */
  66 #define USB_SKEL_MINOR_BASE     200
  67
  68
  69 /*
  70  * Control requests (empty fields: 00)
  71  *
  72  *       RT|RQ|VALUE|INDEX|LEN  |DATA
  73  * In:
  74  *       C1 08             01
  75  *            Get flags (1 byte). Bits: 0=dtr,1=rts,3-7:?
  76  *       C1 0F             ll ll
  77  *            Get device information/status (llll: 0x200 and 0x40 seen).
  78  *            Real size: I only saw MIN(llll,0x64).
  79  *            Contents: seems to be always the same...
  80  *              offset 0x00: Length of this structure (0x64) (len: 1,2,3 bytes)
  81  *              offset 0x3c: String (16 bit chars): "MCCI USB Serial V2.0"
  82  *              rest:        ?
  83  * Out:
  84  *       41 11
  85  *            Initialize/reset device ?
  86  *       41 00 xx 00
  87  *            ? (xx=00 or 01; 01 on start, 00 on close)
  88  *       41 07 vv mm
  89  *            Set/clear flags vv=value, mm=mask (see RQ 08)
  90  *       41 12 xx
  91  *            Used before the following configuration requests are issued
  92  *            (with xx=0x0f). I've seen other values<0xf, though.
  93  *       41 01 xx xx
  94  *            Set baud rate. xxxx=ceil(0x384000/rate)=trunc(0x383fff/rate)+1.
  95  *       41 03 ps bb
  96  *            Set byte size and parity. p:  0x20=even,0x10=odd,0x00=no parity
  97  *                                     [    0x30: m, 0x40: s           ]
  98  *                                     [s:  0: 1 stop bit; 1: 1.5; 2: 2]
  99  *                                      bb: bits/byte (seen 7 and 8)
 100  *       41 13 -- -- -- -- 10 00 ww 00 00 00 xx 00 00 00 yy 00 00 00 zz 00 00 00
 101  *            ??
 102  *            Initialization: 01, 40, 00, 00
 103  *            Open device:    00  40, 00, 00
 104  *            yy and zz seem to be equal, either 0x00 or 0x0a
 105  *            (ww,xx) pairs seen: (00,00), (00,40), (01,40), (09,80), (19,80)
 106  *       41 19 -- -- -- -- 06 00 00 00 00 xx 11 13
 107  *            Used after every "configuration sequence" (RQ 12, RQs 01/03/13).
 108  *            xx is usually 0x00 but was 0x7e before starting data transfer
 109  *            in unimodem mode. So, this might be an array of characters that need
 110  *            special treatment ("commit all bufferd data"?), 11=^Q, 13=^S.
 111  *
 112  * Unimodem mode: use "modprobe ppp_async flag_time=0" as the device _needs_ two
 113  * flags per packet.
 114  */
 115
 116 static int gigaset_probe(struct usb_interface *interface,
 117                          const struct usb_device_id *id);
 118 static void gigaset_disconnect(struct usb_interface *interface);
 119
 120 static struct gigaset_driver *driver = NULL;
 121 static struct cardstate *cardstate = NULL;
 122
 123 /* usb specific object needed to register this driver with the usb subsystem */
 124 static struct usb_driver gigaset_usb_driver = {
 125         .name =         GIGASET_MODULENAME,
 126         .probe =        gigaset_probe,
 127         .disconnect =   gigaset_disconnect,
 128         .id_table =     gigaset_table,
 129 };
 130
 131 struct usb_cardstate {
 132         struct usb_device       *udev;                  /* save off the usb device pointer */
 133         struct usb_interface    *interface;             /* the interface for this device */
 134         atomic_t                busy;                   /* bulk output in progress */
 135
 136         /* Output buffer for commands (M105: and data)*/
 137         unsigned char           *bulk_out_buffer;       /* the buffer to send data */
 138         int                     bulk_out_size;          /* the size of the send buffer */
 139         __u8                    bulk_out_endpointAddr;  /* the address of the bulk out endpoint */
 140         struct urb              *bulk_out_urb;          /* the urb used to transmit data */
 141
 142         /* Input buffer for command responses (M105: and data)*/
 143         int                     rcvbuf_size;            /* the size of the receive buffer */
 144         struct urb              *read_urb;              /* the urb used to receive data */
 145         __u8                    int_in_endpointAddr;    /* the address of the bulk in endpoint */
 146
 147         char                    bchars[6];              /* req. 0x19 */
 148 };
 149
 150 struct usb_bc_state {};
 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         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         dbg(DEBUG_USBREQ, "set flags 0x%02x with mask 0x%02x", val, mask);
 169         r = usb_control_msg(cs->hw.usb->udev,
 170                             usb_sndctrlpipe(cs->hw.usb->udev, 0), 7, 0x41,
 171                             (val & 0xff) | ((mask & 0xff) << 8), 0,
 172                             NULL, 0, 2000 /*timeout??*/); // don't use this in an interrupt/BH
 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         int r, r2;
 182
 183         dbg(DEBUG_USBREQ, "request %02x (%04x)", (unsigned)req, (unsigned)val);
 184         r = usb_control_msg(cs->hw.usb->udev,
 185                             usb_sndctrlpipe(cs->hw.usb->udev, 0), 0x12, 0x41,
 186                             0xf /*?*/, 0,
 187                             NULL, 0, 2000 /*?*/); /* no idea, what this does */
 188         if (r < 0) {
 189                 err("error %d on request 0x12", -r);
 190                 return r;
 191         }
 192
 193         r = usb_control_msg(cs->hw.usb->udev,
 194                             usb_sndctrlpipe(cs->hw.usb->udev, 0), req, 0x41,
 195                             val, 0,
 196                             NULL, 0, 2000 /*?*/);
 197         if (r < 0)
 198                 err("error %d on request 0x%02x", -r, (unsigned)req);
 199
 200         r2 = usb_control_msg(cs->hw.usb->udev,
 201                              usb_sndctrlpipe(cs->hw.usb->udev, 0), 0x19, 0x41,
 202                              0, 0, cs->hw.usb->bchars, 6, 2000 /*?*/);
 203         if (r2 < 0)
 204                 err("error %d on request 0x19", -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                 err("unsupported baudrate request 0x%x,"
 233                     " using default of B9600", 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                 err("CSIZE was not CS5-CS8, using default of 8");
 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 //void send_ack_to_LL(void *data);
 313 static int write_modem(struct cardstate *cs);
 314 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb);
 315
 316
 317 /* Handling of send queue. If there is already a skb opened, put data to
 318  * the transfer buffer by calling "write_modem". Otherwise take a new skb out of the queue.
 319  * This function will be called by the ISR via "transmit_chars" (USB: B-Channel Bulk callback handler
 320  * via immediate task queue) or by writebuf_from_LL if the LL wants to transmit data.
 321  */
 322 static void gigaset_modem_fill(unsigned long data)
 323 {
 324         struct cardstate *cs = (struct cardstate *) data;
 325         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 326         struct cmdbuf_t *cb;
 327         unsigned long flags;
 328         int again;
 329
 330         dbg(DEBUG_OUTPUT, "modem_fill");
 331
 332         if (atomic_read(&cs->hw.usb->busy)) {
 333                 dbg(DEBUG_OUTPUT, "modem_fill: busy");
 334                 return;
 335         }
 336
 337         do {
 338                 again = 0;
 339                 if (!bcs->tx_skb) { /* no skb is being sent */
 340                         spin_lock_irqsave(&cs->cmdlock, flags);
 341                         cb = cs->cmdbuf;
 342                         spin_unlock_irqrestore(&cs->cmdlock, flags);
 343                         if (cb) { /* commands to send? */
 344                                 dbg(DEBUG_OUTPUT, "modem_fill: cb");
 345                                 if (send_cb(cs, cb) < 0) {
 346                                         dbg(DEBUG_OUTPUT,
 347                                             "modem_fill: send_cb failed");
 348                                         again = 1; /* no callback will be called! */
 349                                 }
 350                         } else { /* skbs to send? */
 351                                 bcs->tx_skb = skb_dequeue(&bcs->squeue);
 352                                 if (bcs->tx_skb)
 353                                         dbg(DEBUG_INTR,
 354                                             "Dequeued skb (Adr: %lx)!",
 355                                             (unsigned long) bcs->tx_skb);
 356                         }
 357                 }
 358
 359                 if (bcs->tx_skb) {
 360                         dbg(DEBUG_OUTPUT, "modem_fill: tx_skb");
 361                         if (write_modem(cs) < 0) {
 362                                 dbg(DEBUG_OUTPUT,
 363                                     "modem_fill: write_modem failed");
 364                                 // FIXME should we tell the LL?
 365                                 again = 1; /* no callback will be called! */
 366                         }
 367                 }
 368         } while (again);
 369 }
 370
 371 /**
 372  *      gigaset_read_int_callback
 373  *
 374  *      It is called if the data was received from the device. This is almost similiar to
 375  *      the interrupt service routine in the serial device.
 376  */
 377 static void gigaset_read_int_callback(struct urb *urb, struct pt_regs *regs)
 378 {
 379         int resubmit = 0;
 380         int r;
 381         struct cardstate *cs;
 382         unsigned numbytes;
 383         unsigned char *src;
 384         //unsigned long flags;
 385         struct inbuf_t *inbuf;
 386
 387         IFNULLRET(urb);
 388         inbuf = (struct inbuf_t *) urb->context;
 389         IFNULLRET(inbuf);
 390         //spin_lock_irqsave(&inbuf->lock, flags);
 391         cs = inbuf->cs;
 392         IFNULLGOTO(cs, exit);
 393         IFNULLGOTO(cardstate, exit);
 394
 395         if (!atomic_read(&cs->connected)) {
 396                 err("%s: disconnected", __func__);
 397                 goto exit;
 398         }
 399
 400         if (!urb->status) {
 401                 numbytes = urb->actual_length;
 402
 403                 if (numbytes) {
 404                         src = inbuf->rcvbuf;
 405                         if (unlikely(*src))
 406                                 warn("%s: There was no leading 0, but 0x%02x!",
 407                                      __func__, (unsigned) *src);
 408                         ++src; /* skip leading 0x00 */
 409                         --numbytes;
 410                         if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
 411                                 dbg(DEBUG_INTR, "%s-->BH", __func__);
 412                                 gigaset_schedule_event(inbuf->cs);
 413                         }
 414                 } else
 415                         dbg(DEBUG_INTR, "Received zero block length");
 416                 resubmit = 1;
 417         } else {
 418                 /* The urb might have been killed. */
 419                 dbg(DEBUG_ANY, "%s - nonzero read bulk status received: %d",
 420                     __func__, urb->status);
 421                 if (urb->status != -ENOENT) /* not killed */
 422                         resubmit = 1;
 423         }
 424 exit:
 425         //spin_unlock_irqrestore(&inbuf->lock, flags);
 426         if (resubmit) {
 427                 r = usb_submit_urb(urb, SLAB_ATOMIC);
 428                 if (r)
 429                         err("error %d when resubmitting urb.", -r);
 430         }
 431 }
 432
 433
 434 /* This callback routine is called when data was transmitted to a B-Channel.
 435  * Therefore it has to check if there is still data to transmit. This
 436  * happens by calling modem_fill via task queue.
 437  *
 438  */
 439 static void gigaset_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
 440 {
 441         struct cardstate *cs = (struct cardstate *) urb->context;
 442
 443         IFNULLRET(cs);
 444 #ifdef CONFIG_GIGASET_DEBUG
 445         if (!atomic_read(&cs->connected)) {
 446                 err("%s:not connected", __func__);
 447                 return;
 448         }
 449 #endif
 450         if (urb->status)
 451                 err("bulk transfer failed (status %d)", -urb->status); /* That's all we can do. Communication problems
 452                                                                            are handeled by timeouts or network protocols */
 453
 454         atomic_set(&cs->hw.usb->busy, 0);
 455         tasklet_schedule(&cs->write_tasklet);
 456 }
 457
 458 static int send_cb(struct cardstate *cs, struct cmdbuf_t *cb)
 459 {
 460         struct cmdbuf_t *tcb;
 461         unsigned long flags;
 462         int count;
 463         int status = -ENOENT; // FIXME
 464         struct usb_cardstate *ucs = cs->hw.usb;
 465
 466         do {
 467                 if (!cb->len) {
 468                         tcb = cb;
 469
 470                         spin_lock_irqsave(&cs->cmdlock, flags);
 471                         cs->cmdbytes -= cs->curlen;
 472                         dbg(DEBUG_OUTPUT, "send_cb: sent %u bytes, %u left",
 473                             cs->curlen, cs->cmdbytes);
 474                         cs->cmdbuf = cb = cb->next;
 475                         if (cb) {
 476                                 cb->prev = NULL;
 477                                 cs->curlen = cb->len;
 478                         } else {
 479                                 cs->lastcmdbuf = NULL;
 480                                 cs->curlen = 0;
 481                         }
 482                         spin_unlock_irqrestore(&cs->cmdlock, flags);
 483
 484                         if (tcb->wake_tasklet)
 485                                 tasklet_schedule(tcb->wake_tasklet);
 486                         kfree(tcb);
 487                 }
 488                 if (cb) {
 489                         count = min(cb->len, ucs->bulk_out_size);
 490                         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 491                                           usb_sndbulkpipe(ucs->udev,
 492                                              ucs->bulk_out_endpointAddr & 0x0f),
 493                                           cb->buf + cb->offset, count,
 494                                           gigaset_write_bulk_callback, cs);
 495
 496                         cb->offset += count;
 497                         cb->len -= count;
 498                         atomic_set(&ucs->busy, 1);
 499                         dbg(DEBUG_OUTPUT, "send_cb: send %d bytes", count);
 500
 501                         status = usb_submit_urb(ucs->bulk_out_urb, SLAB_ATOMIC);
 502                         if (status) {
 503                                 atomic_set(&ucs->busy, 0);
 504                                 err("could not submit urb (error %d).",
 505                                     -status);
 506                                 cb->len = 0; /* skip urb => remove cb+wakeup in next loop cycle */
 507                         }
 508                 }
 509         } while (cb && status); /* bei Fehler naechster Befehl //FIXME: ist das OK? */
 510
 511         return status;
 512 }
 513
 514 /* Write string into transbuf and send it to modem.
 515  */
 516 static int gigaset_write_cmd(struct cardstate *cs, const unsigned char *buf,
 517                              int len, struct tasklet_struct *wake_tasklet)
 518 {
 519         struct cmdbuf_t *cb;
 520         unsigned long flags;
 521
 522         gigaset_dbg_buffer(atomic_read(&cs->mstate) != MS_LOCKED ?
 523                              DEBUG_TRANSCMD : DEBUG_LOCKCMD,
 524                            "CMD Transmit", len, buf, 0);
 525
 526         if (!atomic_read(&cs->connected)) {
 527                 err("%s: not connected", __func__);
 528                 return -ENODEV;
 529         }
 530
 531         if (len <= 0)
 532                 return 0;
 533
 534         if (!(cb = kmalloc(sizeof(struct cmdbuf_t) + len, GFP_ATOMIC))) {
 535                 err("%s: out of memory", __func__);
 536                 return -ENOMEM;
 537         }
 538
 539         memcpy(cb->buf, buf, len);
 540         cb->len = len;
 541         cb->offset = 0;
 542         cb->next = NULL;
 543         cb->wake_tasklet = wake_tasklet;
 544
 545         spin_lock_irqsave(&cs->cmdlock, flags);
 546         cb->prev = cs->lastcmdbuf;
 547         if (cs->lastcmdbuf)
 548                 cs->lastcmdbuf->next = cb;
 549         else {
 550                 cs->cmdbuf = cb;
 551                 cs->curlen = len;
 552         }
 553         cs->cmdbytes += len;
 554         cs->lastcmdbuf = cb;
 555         spin_unlock_irqrestore(&cs->cmdlock, flags);
 556
 557         tasklet_schedule(&cs->write_tasklet);
 558         return len;
 559 }
 560
 561 static int gigaset_write_room(struct cardstate *cs)
 562 {
 563         unsigned long flags;
 564         unsigned bytes;
 565
 566         spin_lock_irqsave(&cs->cmdlock, flags);
 567         bytes = cs->cmdbytes;
 568         spin_unlock_irqrestore(&cs->cmdlock, flags);
 569
 570         return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
 571 }
 572
 573 static int gigaset_chars_in_buffer(struct cardstate *cs)
 574 {
 575         return cs->cmdbytes;
 576 }
 577
 578 static int gigaset_brkchars(struct cardstate *cs, const unsigned char buf[6])
 579 {
 580 #ifdef CONFIG_GIGASET_UNDOCREQ
 581         gigaset_dbg_buffer(DEBUG_USBREQ, "brkchars", 6, buf, 0);
 582         memcpy(cs->hw.usb->bchars, buf, 6);
 583         return usb_control_msg(cs->hw.usb->udev,
 584                                usb_sndctrlpipe(cs->hw.usb->udev, 0), 0x19, 0x41,
 585                                0, 0, &buf, 6, 2000);
 586 #else
 587         return -EINVAL;
 588 #endif
 589 }
 590
 591 static int gigaset_freebcshw(struct bc_state *bcs)
 592 {
 593         if (!bcs->hw.usb)
 594                 return 0;
 595         //FIXME
 596         kfree(bcs->hw.usb);
 597         return 1;
 598 }
 599
 600 /* Initialize the b-channel structure */
 601 static int gigaset_initbcshw(struct bc_state *bcs)
 602 {
 603         bcs->hw.usb = kmalloc(sizeof(struct usb_bc_state), GFP_KERNEL);
 604         if (!bcs->hw.usb)
 605                 return 0;
 606
 607         //bcs->hw.usb->trans_flg = READY_TO_TRNSMIT; /* B-Channel ready to transmit */
 608         return 1;
 609 }
 610
 611 static void gigaset_reinitbcshw(struct bc_state *bcs)
 612 {
 613 }
 614
 615 static void gigaset_freecshw(struct cardstate *cs)
 616 {
 617         //FIXME
 618         tasklet_kill(&cs->write_tasklet);
 619         kfree(cs->hw.usb);
 620 }
 621
 622 static int gigaset_initcshw(struct cardstate *cs)
 623 {
 624         struct usb_cardstate *ucs;
 625
 626         cs->hw.usb = ucs =
 627                 kmalloc(sizeof(struct usb_cardstate), GFP_KERNEL);
 628         if (!ucs)
 629                 return 0;
 630
 631         ucs->bchars[0] = 0;
 632         ucs->bchars[1] = 0;
 633         ucs->bchars[2] = 0;
 634         ucs->bchars[3] = 0;
 635         ucs->bchars[4] = 0x11;
 636         ucs->bchars[5] = 0x13;
 637         ucs->bulk_out_buffer = NULL;
 638         ucs->bulk_out_urb = NULL;
 639         //ucs->urb_cmd_out = NULL;
 640         ucs->read_urb = NULL;
 641         tasklet_init(&cs->write_tasklet,
 642                      &gigaset_modem_fill, (unsigned long) cs);
 643
 644         return 1;
 645 }
 646
 647 /* Writes the data of the current open skb into the modem.
 648  * We have to protect against multiple calls until the
 649  * callback handler () is called , due to the fact that we
 650  * are just allowed to send data once to an endpoint. Therefore
 651  * we using "trans_flg" to synchonize ...
 652  */
 653 static int write_modem(struct cardstate *cs)
 654 {
 655         int ret;
 656         int count;
 657         struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
 658         struct usb_cardstate *ucs = cs->hw.usb;
 659         //unsigned long flags;
 660
 661         IFNULLRETVAL(bcs->tx_skb, -EINVAL);
 662
 663         dbg(DEBUG_WRITE, "len: %d...", bcs->tx_skb->len);
 664
 665         ret = -ENODEV;
 666         IFNULLGOTO(ucs->bulk_out_buffer, error);
 667         IFNULLGOTO(ucs->bulk_out_urb, error);
 668         ret = 0;
 669
 670         if (!bcs->tx_skb->len) {
 671                 dev_kfree_skb_any(bcs->tx_skb);
 672                 bcs->tx_skb = NULL;
 673                 return -EINVAL;
 674         }
 675
 676         /* Copy data to bulk out buffer and  // FIXME copying not necessary
 677          * transmit data
 678          */
 679         count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
 680         memcpy(ucs->bulk_out_buffer, bcs->tx_skb->data, count);
 681         skb_pull(bcs->tx_skb, count);
 682
 683         usb_fill_bulk_urb(ucs->bulk_out_urb, ucs->udev,
 684                           usb_sndbulkpipe(ucs->udev,
 685                                           ucs->bulk_out_endpointAddr & 0x0f),
 686                           ucs->bulk_out_buffer, count,
 687                           gigaset_write_bulk_callback, cs);
 688         atomic_set(&ucs->busy, 1);
 689         dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);
 690
 691         ret = usb_submit_urb(ucs->bulk_out_urb, SLAB_ATOMIC);
 692         if (ret) {
 693                 err("could not submit urb (error %d).", -ret);
 694                 atomic_set(&ucs->busy, 0);
 695         }
 696         if (!bcs->tx_skb->len) {
 697                 /* skb sent completely */
 698                 gigaset_skb_sent(bcs, bcs->tx_skb); //FIXME also, when ret<0?
 699
 700                 dbg(DEBUG_INTR,
 701                     "kfree skb (Adr: %lx)!", (unsigned long) bcs->tx_skb);
 702                 dev_kfree_skb_any(bcs->tx_skb);
 703                 bcs->tx_skb = NULL;
 704         }
 705
 706         return ret;
 707 error:
 708         dev_kfree_skb_any(bcs->tx_skb);
 709         bcs->tx_skb = NULL;
 710         return ret;
 711
 712 }
 713
 714 static int gigaset_probe(struct usb_interface *interface,
 715                          const struct usb_device_id *id)
 716 {
 717         int retval;
 718         struct usb_device *udev = interface_to_usbdev(interface);
 719         unsigned int ifnum;
 720         struct usb_host_interface *hostif;
 721         struct cardstate *cs = NULL;
 722         struct usb_cardstate *ucs = NULL;
 723         //struct usb_interface_descriptor *iface_desc;
 724         struct usb_endpoint_descriptor *endpoint;
 725         //isdn_ctrl command;
 726         int buffer_size;
 727         int alt;
 728         //unsigned long flags;
 729
 730         info("%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
 731             __func__, le16_to_cpu(udev->descriptor.idVendor),
 732             le16_to_cpu(udev->descriptor.idProduct));
 733
 734         retval = -ENODEV; //FIXME
 735
 736         /* See if the device offered us matches what we can accept */
 737         if ((le16_to_cpu(udev->descriptor.idVendor  != USB_M105_VENDOR_ID)) ||
 738             (le16_to_cpu(udev->descriptor.idProduct != USB_M105_PRODUCT_ID)))
 739                 return -ENODEV;
 740
 741         /* this starts to become ascii art... */
 742         hostif = interface->cur_altsetting;
 743         alt = hostif->desc.bAlternateSetting;
 744         ifnum = hostif->desc.bInterfaceNumber; // FIXME ?
 745
 746         if (alt != 0 || ifnum != 0) {
 747                 warn("ifnum %d, alt %d", ifnum, alt);
 748                 return -ENODEV;
 749         }
 750
 751         /* Reject application specific intefaces
 752          *
 753          */
 754         if (hostif->desc.bInterfaceClass != 255) {
 755                 info("%s: Device matched, but iface_desc[%d]->bInterfaceClass==%d !",
 756                        __func__, ifnum, hostif->desc.bInterfaceClass);
 757                 return -ENODEV;
 758         }
 759
 760         info("%s: Device matched ... !", __func__);
 761
 762         cs = gigaset_getunassignedcs(driver);
 763         if (!cs) {
 764                 warn("No free cardstate!");
 765                 return -ENODEV;
 766         }
 767         ucs = cs->hw.usb;
 768
 769 #if 0
 770         if (usb_set_configuration(udev, udev->config[0].desc.bConfigurationValue) < 0) {
 771                 warn("set_configuration failed");
 772                 goto error;
 773         }
 774
 775
 776         if (usb_set_interface(udev, ifnum/*==0*/, alt/*==0*/) < 0) {
 777                 warn("usb_set_interface failed, device %d interface %d altsetting %d",
 778                      udev->devnum, ifnum, alt);
 779                 goto error;
 780         }
 781 #endif
 782
 783         /* set up the endpoint information */
 784         /* check out the endpoints */
 785         /* We will get 2 endpoints: One for sending commands to the device (bulk out) and one to
 786          * poll messages from the device(int in).
 787          * Therefore we will have an almost similiar situation as with our serial port handler.
 788          * If an connection will be established, we will have to create data in/out pipes
 789          * dynamically...
 790          */
 791
 792         endpoint = &hostif->endpoint[0].desc;
 793
 794         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 795         ucs->bulk_out_size = buffer_size;
 796         ucs->bulk_out_endpointAddr = endpoint->bEndpointAddress;
 797         ucs->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
 798         if (!ucs->bulk_out_buffer) {
 799                 err("Couldn't allocate bulk_out_buffer");
 800                 retval = -ENOMEM;
 801                 goto error;
 802         }
 803
 804         ucs->bulk_out_urb = usb_alloc_urb(0, SLAB_KERNEL);
 805         if (!ucs->bulk_out_urb) {
 806                 err("Couldn't allocate bulk_out_buffer");
 807                 retval = -ENOMEM;
 808                 goto error;
 809         }
 810
 811         endpoint = &hostif->endpoint[1].desc;
 812
 813         atomic_set(&ucs->busy, 0);
 814         ucs->udev = udev;
 815         ucs->interface = interface;
 816
 817         ucs->read_urb = usb_alloc_urb(0, SLAB_KERNEL);
 818         if (!ucs->read_urb) {
 819                 err("No free urbs available");
 820                 retval = -ENOMEM;
 821                 goto error;
 822         }
 823         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 824         ucs->rcvbuf_size = buffer_size;
 825         ucs->int_in_endpointAddr = endpoint->bEndpointAddress;
 826         cs->inbuf[0].rcvbuf = kmalloc(buffer_size, GFP_KERNEL);
 827         if (!cs->inbuf[0].rcvbuf) {
 828                 err("Couldn't allocate rcvbuf");
 829                 retval = -ENOMEM;
 830                 goto error;
 831         }
 832         /* Fill the interrupt urb and send it to the core */
 833         usb_fill_int_urb(ucs->read_urb, udev,
 834                          usb_rcvintpipe(udev,
 835                                         endpoint->bEndpointAddress & 0x0f),
 836                          cs->inbuf[0].rcvbuf, buffer_size,
 837                          gigaset_read_int_callback,
 838                          cs->inbuf + 0, endpoint->bInterval);
 839
 840         retval = usb_submit_urb(ucs->read_urb, SLAB_KERNEL);
 841         if (retval) {
 842                 err("Could not submit URB!");
 843                 goto error;
 844         }
 845
 846         /* tell common part that the device is ready */
 847         if (startmode == SM_LOCKED)
 848                 atomic_set(&cs->mstate, MS_LOCKED);
 849         if (!gigaset_start(cs)) {
 850                 tasklet_kill(&cs->write_tasklet);
 851                 retval = -ENODEV; //FIXME
 852                 goto error;
 853         }
 854
 855         /* save address of controller structure */
 856         usb_set_intfdata(interface, cs);
 857
 858         /* set up device sysfs */
 859         gigaset_init_dev_sysfs(interface);
 860         return 0;
 861
 862 error:
 863         if (ucs->read_urb)
 864                 usb_kill_urb(ucs->read_urb);
 865         kfree(ucs->bulk_out_buffer);
 866         if (ucs->bulk_out_urb != NULL)
 867                 usb_free_urb(ucs->bulk_out_urb);
 868         kfree(cs->inbuf[0].rcvbuf);
 869         if (ucs->read_urb != NULL)
 870                 usb_free_urb(ucs->read_urb);
 871         ucs->read_urb = ucs->bulk_out_urb = NULL;
 872         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
 873         gigaset_unassign(cs);
 874         return retval;
 875 }
 876
 877 /**
 878  *      skel_disconnect
 879  */
 880 static void gigaset_disconnect(struct usb_interface *interface)
 881 {
 882         struct cardstate *cs;
 883         struct usb_cardstate *ucs;
 884
 885         cs = usb_get_intfdata(interface);
 886
 887         /* clear device sysfs */
 888         gigaset_free_dev_sysfs(interface);
 889
 890         usb_set_intfdata(interface, NULL);
 891         ucs = cs->hw.usb;
 892         usb_kill_urb(ucs->read_urb);
 893         //info("GigaSet USB device #%d will be disconnected", minor);
 894
 895         gigaset_stop(cs);
 896
 897         tasklet_kill(&cs->write_tasklet);
 898
 899         usb_kill_urb(ucs->bulk_out_urb);  /* FIXME: nur, wenn noetig */
 900         //usb_kill_urb(ucs->urb_cmd_out);  /* FIXME: nur, wenn noetig */
 901
 902         kfree(ucs->bulk_out_buffer);
 903         if (ucs->bulk_out_urb != NULL)
 904                 usb_free_urb(ucs->bulk_out_urb);
 905         //if(ucs->urb_cmd_out != NULL)
 906         //      usb_free_urb(ucs->urb_cmd_out);
 907         kfree(cs->inbuf[0].rcvbuf);
 908         if (ucs->read_urb != NULL)
 909                 usb_free_urb(ucs->read_urb);
 910         ucs->read_urb = ucs->bulk_out_urb/*=ucs->urb_cmd_out*/=NULL;
 911         cs->inbuf[0].rcvbuf = ucs->bulk_out_buffer = NULL;
 912
 913         gigaset_unassign(cs);
 914 }
 915
 916 static struct gigaset_ops ops = {
 917         gigaset_write_cmd,
 918         gigaset_write_room,
 919         gigaset_chars_in_buffer,
 920         gigaset_brkchars,
 921         gigaset_init_bchannel,
 922         gigaset_close_bchannel,
 923         gigaset_initbcshw,
 924         gigaset_freebcshw,
 925         gigaset_reinitbcshw,
 926         gigaset_initcshw,
 927         gigaset_freecshw,
 928         gigaset_set_modem_ctrl,
 929         gigaset_baud_rate,
 930         gigaset_set_line_ctrl,
 931         gigaset_m10x_send_skb,
 932         gigaset_m10x_input,
 933 };
 934
 935 /**
 936  *      usb_gigaset_init
 937  * This function is called while kernel-module is loaded
 938  */
 939 static int __init usb_gigaset_init(void)
 940 {
 941         int result;
 942
 943         /* allocate memory for our driver state and intialize it */
 944         if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
 945                                        GIGASET_MODULENAME, GIGASET_DEVNAME,
 946                                        GIGASET_DEVFSNAME, &ops,
 947                                        THIS_MODULE)) == NULL)
 948                 goto error;
 949
 950         /* allocate memory for our device state and intialize it */
 951         cardstate = gigaset_initcs(driver, 1, 1, 0, cidmode, GIGASET_MODULENAME);
 952         if (!cardstate)
 953                 goto error;
 954
 955         /* register this driver with the USB subsystem */
 956         result = usb_register(&gigaset_usb_driver);
 957         if (result < 0) {
 958                 err("usb_gigaset: usb_register failed (error %d)",
 959                     -result);
 960                 goto error;
 961         }
 962
 963         info(DRIVER_AUTHOR);
 964         info(DRIVER_DESC);
 965         return 0;
 966
 967 error:  if (cardstate)
 968                 gigaset_freecs(cardstate);
 969         cardstate = NULL;
 970         if (driver)
 971                 gigaset_freedriver(driver);
 972         driver = NULL;
 973         return -1;
 974 }
 975
 976
 977 /**
 978  *      usb_gigaset_exit
 979  * This function is called while unloading the kernel-module
 980  */
 981 static void __exit usb_gigaset_exit(void)
 982 {
 983         gigaset_blockdriver(driver); /* => probe will fail
 984                                       * => no gigaset_start any more
 985                                       */
 986
 987         gigaset_shutdown(cardstate);
 988         /* from now on, no isdn callback should be possible */
 989
 990         /* deregister this driver with the USB subsystem */
 991         usb_deregister(&gigaset_usb_driver);
 992         /* this will call the disconnect-callback */
 993         /* from now on, no disconnect/probe callback should be running */
 994
 995         gigaset_freecs(cardstate);
 996         cardstate = NULL;
 997         gigaset_freedriver(driver);
 998         driver = NULL;
 999 }
1000
1001
1002 module_init(usb_gigaset_init);
1003 module_exit(usb_gigaset_exit);
1004
1005 MODULE_AUTHOR(DRIVER_AUTHOR);
1006 MODULE_DESCRIPTION(DRIVER_DESC);
1007
1008 MODULE_LICENSE("GPL");