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   1 /*
   2  * Stuff used by all variants of the driver
   3  *
   4  * Copyright (c) 2001 by Stefan Eilers,
   5  *                       Hansjoerg Lipp <hjlipp@web.de>,
   6  *                       Tilman Schmidt <tilman@imap.cc>.
   7  *
   8  * =====================================================================
   9  *      This program is free software; you can redistribute it and/or
  10  *      modify it under the terms of the GNU General Public License as
  11  *      published by the Free Software Foundation; either version 2 of
  12  *      the License, or (at your option) any later version.
  13  * =====================================================================
  14  */
  15
  16 #include "gigaset.h"
  17
  18 /* == Handling of I4L IO =====================================================*/
  19
  20 /* writebuf_from_LL
  21  * called by LL to transmit data on an open channel
  22  * inserts the buffer data into the send queue and starts the transmission
  23  * Note that this operation must not sleep!
  24  * When the buffer is processed completely, gigaset_skb_sent() should be called.
  25  * parameters:
  26  *      driverID        driver ID as assigned by LL
  27  *      channel         channel number
  28  *      ack             if != 0 LL wants to be notified on completion via
  29  *                      statcallb(ISDN_STAT_BSENT)
  30  *      skb             skb containing data to send
  31  * return value:
  32  *      number of accepted bytes
  33  *      0 if temporarily unable to accept data (out of buffer space)
  34  *      <0 on error (eg. -EINVAL)
  35  */
  36 static int writebuf_from_LL(int driverID, int channel, int ack,
  37                             struct sk_buff *skb)
  38 {
  39         struct cardstate *cs;
  40         struct bc_state *bcs;
  41         unsigned len;
  42         unsigned skblen;
  43
  44         if (!(cs = gigaset_get_cs_by_id(driverID))) {
  45                 pr_err("%s: invalid driver ID (%d)\n", __func__, driverID);
  46                 return -ENODEV;
  47         }
  48         if (channel < 0 || channel >= cs->channels) {
  49                 dev_err(cs->dev, "%s: invalid channel ID (%d)\n",
  50                         __func__, channel);
  51                 return -ENODEV;
  52         }
  53         bcs = &cs->bcs[channel];
  54
  55         /* can only handle linear sk_buffs */
  56         if (skb_linearize(skb) < 0) {
  57                 dev_err(cs->dev, "%s: skb_linearize failed\n", __func__);
  58                 return -ENOMEM;
  59         }
  60         len = skb->len;
  61
  62         gig_dbg(DEBUG_LLDATA,
  63                 "Receiving data from LL (id: %d, ch: %d, ack: %d, sz: %d)",
  64                 driverID, channel, ack, len);
  65
  66         if (!len) {
  67                 if (ack)
  68                         dev_notice(cs->dev, "%s: not ACKing empty packet\n",
  69                                    __func__);
  70                 return 0;
  71         }
  72         if (len > MAX_BUF_SIZE) {
  73                 dev_err(cs->dev, "%s: packet too large (%d bytes)\n",
  74                         __func__, len);
  75                 return -EINVAL;
  76         }
  77
  78         skblen = ack ? len : 0;
  79         skb->head[0] = skblen & 0xff;
  80         skb->head[1] = skblen >> 8;
  81         gig_dbg(DEBUG_MCMD, "skb: len=%u, skblen=%u: %02x %02x",
  82                 len, skblen, (unsigned) skb->head[0], (unsigned) skb->head[1]);
  83
  84         /* pass to device-specific module */
  85         return cs->ops->send_skb(bcs, skb);
  86 }
  87
  88 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb)
  89 {
  90         unsigned len;
  91         isdn_ctrl response;
  92
  93         ++bcs->trans_up;
  94
  95         if (skb->len)
  96                 dev_warn(bcs->cs->dev, "%s: skb->len==%d\n",
  97                          __func__, skb->len);
  98
  99         len = (unsigned char) skb->head[0] |
 100               (unsigned) (unsigned char) skb->head[1] << 8;
 101         if (len) {
 102                 gig_dbg(DEBUG_MCMD, "ACKing to LL (id: %d, ch: %d, sz: %u)",
 103                         bcs->cs->myid, bcs->channel, len);
 104
 105                 response.driver = bcs->cs->myid;
 106                 response.command = ISDN_STAT_BSENT;
 107                 response.arg = bcs->channel;
 108                 response.parm.length = len;
 109                 bcs->cs->iif.statcallb(&response);
 110         }
 111 }
 112 EXPORT_SYMBOL_GPL(gigaset_skb_sent);
 113
 114 /* This function will be called by LL to send commands
 115  * NOTE: LL ignores the returned value, for commands other than ISDN_CMD_IOCTL,
 116  * so don't put too much effort into it.
 117  */
 118 static int command_from_LL(isdn_ctrl *cntrl)
 119 {
 120         struct cardstate *cs = gigaset_get_cs_by_id(cntrl->driver);
 121         struct bc_state *bcs;
 122         int retval = 0;
 123         struct setup_parm *sp;
 124
 125         gigaset_debugdrivers();
 126
 127         if (!cs) {
 128                 pr_err("%s: invalid driver ID (%d)\n", __func__, cntrl->driver);
 129                 return -ENODEV;
 130         }
 131
 132         switch (cntrl->command) {
 133         case ISDN_CMD_IOCTL:
 134                 gig_dbg(DEBUG_ANY, "ISDN_CMD_IOCTL (driver: %d, arg: %ld)",
 135                         cntrl->driver, cntrl->arg);
 136
 137                 dev_warn(cs->dev, "ISDN_CMD_IOCTL not supported\n");
 138                 return -EINVAL;
 139
 140         case ISDN_CMD_DIAL:
 141                 gig_dbg(DEBUG_ANY,
 142                         "ISDN_CMD_DIAL (driver: %d, ch: %ld, "
 143                         "phone: %s, ownmsn: %s, si1: %d, si2: %d)",
 144                         cntrl->driver, cntrl->arg,
 145                         cntrl->parm.setup.phone, cntrl->parm.setup.eazmsn,
 146                         cntrl->parm.setup.si1, cntrl->parm.setup.si2);
 147
 148                 if (cntrl->arg >= cs->channels) {
 149                         dev_err(cs->dev,
 150                                 "ISDN_CMD_DIAL: invalid channel (%d)\n",
 151                                 (int) cntrl->arg);
 152                         return -EINVAL;
 153                 }
 154
 155                 bcs = cs->bcs + cntrl->arg;
 156
 157                 if (!gigaset_get_channel(bcs)) {
 158                         dev_err(cs->dev, "ISDN_CMD_DIAL: channel not free\n");
 159                         return -EBUSY;
 160                 }
 161
 162                 sp = kmalloc(sizeof *sp, GFP_ATOMIC);
 163                 if (!sp) {
 164                         gigaset_free_channel(bcs);
 165                         dev_err(cs->dev, "ISDN_CMD_DIAL: out of memory\n");
 166                         return -ENOMEM;
 167                 }
 168                 *sp = cntrl->parm.setup;
 169
 170                 if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, sp,
 171                                        bcs->at_state.seq_index, NULL)) {
 172                         //FIXME what should we do?
 173                         kfree(sp);
 174                         gigaset_free_channel(bcs);
 175                         return -ENOMEM;
 176                 }
 177
 178                 gig_dbg(DEBUG_CMD, "scheduling DIAL");
 179                 gigaset_schedule_event(cs);
 180                 break;
 181         case ISDN_CMD_ACCEPTD: //FIXME
 182                 gig_dbg(DEBUG_ANY, "ISDN_CMD_ACCEPTD");
 183
 184                 if (cntrl->arg >= cs->channels) {
 185                         dev_err(cs->dev,
 186                                 "ISDN_CMD_ACCEPTD: invalid channel (%d)\n",
 187                                 (int) cntrl->arg);
 188                         return -EINVAL;
 189                 }
 190
 191                 if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg].at_state,
 192                                        EV_ACCEPT, NULL, 0, NULL)) {
 193                         //FIXME what should we do?
 194                         return -ENOMEM;
 195                 }
 196
 197                 gig_dbg(DEBUG_CMD, "scheduling ACCEPT");
 198                 gigaset_schedule_event(cs);
 199
 200                 break;
 201         case ISDN_CMD_ACCEPTB:
 202                 gig_dbg(DEBUG_ANY, "ISDN_CMD_ACCEPTB");
 203                 break;
 204         case ISDN_CMD_HANGUP:
 205                 gig_dbg(DEBUG_ANY, "ISDN_CMD_HANGUP (ch: %d)",
 206                         (int) cntrl->arg);
 207
 208                 if (cntrl->arg >= cs->channels) {
 209                         dev_err(cs->dev,
 210                                 "ISDN_CMD_HANGUP: invalid channel (%d)\n",
 211                                 (int) cntrl->arg);
 212                         return -EINVAL;
 213                 }
 214
 215                 if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg].at_state,
 216                                        EV_HUP, NULL, 0, NULL)) {
 217                         //FIXME what should we do?
 218                         return -ENOMEM;
 219                 }
 220
 221                 gig_dbg(DEBUG_CMD, "scheduling HUP");
 222                 gigaset_schedule_event(cs);
 223
 224                 break;
 225         case ISDN_CMD_CLREAZ: /* Do not signal incoming signals */ //FIXME
 226                 gig_dbg(DEBUG_ANY, "ISDN_CMD_CLREAZ");
 227                 break;
 228         case ISDN_CMD_SETEAZ: /* Signal incoming calls for given MSN */ //FIXME
 229                 gig_dbg(DEBUG_ANY,
 230                         "ISDN_CMD_SETEAZ (id: %d, ch: %ld, number: %s)",
 231                         cntrl->driver, cntrl->arg, cntrl->parm.num);
 232                 break;
 233         case ISDN_CMD_SETL2: /* Set L2 to given protocol */
 234                 gig_dbg(DEBUG_ANY, "ISDN_CMD_SETL2 (ch: %ld, proto: %lx)",
 235                         cntrl->arg & 0xff, (cntrl->arg >> 8));
 236
 237                 if ((cntrl->arg & 0xff) >= cs->channels) {
 238                         dev_err(cs->dev,
 239                                 "ISDN_CMD_SETL2: invalid channel (%d)\n",
 240                                 (int) cntrl->arg & 0xff);
 241                         return -EINVAL;
 242                 }
 243
 244                 if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg & 0xff].at_state,
 245                                        EV_PROTO_L2, NULL, cntrl->arg >> 8,
 246                                        NULL)) {
 247                         //FIXME what should we do?
 248                         return -ENOMEM;
 249                 }
 250
 251                 gig_dbg(DEBUG_CMD, "scheduling PROTO_L2");
 252                 gigaset_schedule_event(cs);
 253                 break;
 254         case ISDN_CMD_SETL3: /* Set L3 to given protocol */
 255                 gig_dbg(DEBUG_ANY, "ISDN_CMD_SETL3 (ch: %ld, proto: %lx)",
 256                         cntrl->arg & 0xff, (cntrl->arg >> 8));
 257
 258                 if ((cntrl->arg & 0xff) >= cs->channels) {
 259                         dev_err(cs->dev,
 260                                 "ISDN_CMD_SETL3: invalid channel (%d)\n",
 261                                 (int) cntrl->arg & 0xff);
 262                         return -EINVAL;
 263                 }
 264
 265                 if (cntrl->arg >> 8 != ISDN_PROTO_L3_TRANS) {
 266                         dev_err(cs->dev,
 267                                 "ISDN_CMD_SETL3: invalid protocol %lu\n",
 268                                 cntrl->arg >> 8);
 269                         return -EINVAL;
 270                 }
 271
 272                 break;
 273         case ISDN_CMD_PROCEED:
 274                 gig_dbg(DEBUG_ANY, "ISDN_CMD_PROCEED"); //FIXME
 275                 break;
 276         case ISDN_CMD_ALERT:
 277                 gig_dbg(DEBUG_ANY, "ISDN_CMD_ALERT"); //FIXME
 278                 if (cntrl->arg >= cs->channels) {
 279                         dev_err(cs->dev,
 280                                 "ISDN_CMD_ALERT: invalid channel (%d)\n",
 281                                 (int) cntrl->arg);
 282                         return -EINVAL;
 283                 }
 284                 //bcs = cs->bcs + cntrl->arg;
 285                 //bcs->proto2 = -1;
 286                 // FIXME
 287                 break;
 288         case ISDN_CMD_REDIR:
 289                 gig_dbg(DEBUG_ANY, "ISDN_CMD_REDIR"); //FIXME
 290                 break;
 291         case ISDN_CMD_PROT_IO:
 292                 gig_dbg(DEBUG_ANY, "ISDN_CMD_PROT_IO");
 293                 break;
 294         case ISDN_CMD_FAXCMD:
 295                 gig_dbg(DEBUG_ANY, "ISDN_CMD_FAXCMD");
 296                 break;
 297         case ISDN_CMD_GETL2:
 298                 gig_dbg(DEBUG_ANY, "ISDN_CMD_GETL2");
 299                 break;
 300         case ISDN_CMD_GETL3:
 301                 gig_dbg(DEBUG_ANY, "ISDN_CMD_GETL3");
 302                 break;
 303         case ISDN_CMD_GETEAZ:
 304                 gig_dbg(DEBUG_ANY, "ISDN_CMD_GETEAZ");
 305                 break;
 306         case ISDN_CMD_SETSIL:
 307                 gig_dbg(DEBUG_ANY, "ISDN_CMD_SETSIL");
 308                 break;
 309         case ISDN_CMD_GETSIL:
 310                 gig_dbg(DEBUG_ANY, "ISDN_CMD_GETSIL");
 311                 break;
 312         default:
 313                 dev_err(cs->dev, "unknown command %d from LL\n",
 314                         cntrl->command);
 315                 return -EINVAL;
 316         }
 317
 318         return retval;
 319 }
 320
 321 void gigaset_i4l_cmd(struct cardstate *cs, int cmd)
 322 {
 323         isdn_ctrl command;
 324
 325         command.driver = cs->myid;
 326         command.command = cmd;
 327         command.arg = 0;
 328         cs->iif.statcallb(&command);
 329 }
 330
 331 void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd)
 332 {
 333         isdn_ctrl command;
 334
 335         command.driver = bcs->cs->myid;
 336         command.command = cmd;
 337         command.arg = bcs->channel;
 338         bcs->cs->iif.statcallb(&command);
 339 }
 340
 341 int gigaset_isdn_setup_dial(struct at_state_t *at_state, void *data)
 342 {
 343         struct bc_state *bcs = at_state->bcs;
 344         unsigned proto;
 345         const char *bc;
 346         size_t length[AT_NUM];
 347         size_t l;
 348         int i;
 349         struct setup_parm *sp = data;
 350
 351         switch (bcs->proto2) {
 352         case ISDN_PROTO_L2_HDLC:
 353                 proto = 1; /* 0: Bitsynchron, 1: HDLC, 2: voice */
 354                 break;
 355         case ISDN_PROTO_L2_TRANS:
 356                 proto = 2; /* 0: Bitsynchron, 1: HDLC, 2: voice */
 357                 break;
 358         default:
 359                 dev_err(bcs->cs->dev, "%s: invalid L2 protocol: %u\n",
 360                         __func__, bcs->proto2);
 361                 return -EINVAL;
 362         }
 363
 364         switch (sp->si1) {
 365         case 1:         /* audio */
 366                 bc = "9090A3";  /* 3.1 kHz audio, A-law */
 367                 break;
 368         case 7:         /* data */
 369         default:        /* hope the app knows what it is doing */
 370                 bc = "8890";    /* unrestricted digital information */
 371         }
 372         //FIXME add missing si1 values from 1TR6, inspect si2, set HLC/LLC
 373
 374         length[AT_DIAL ] = 1 + strlen(sp->phone) + 1 + 1;
 375         l = strlen(sp->eazmsn);
 376         length[AT_MSN  ] = l ? 6 + l + 1 + 1 : 0;
 377         length[AT_BC   ] = 5 + strlen(bc) + 1 + 1;
 378         length[AT_PROTO] = 6 + 1 + 1 + 1; /* proto: 1 character */
 379         length[AT_ISO  ] = 6 + 1 + 1 + 1; /* channel: 1 character */
 380         length[AT_TYPE ] = 6 + 1 + 1 + 1; /* call type: 1 character */
 381         length[AT_HLC  ] = 0;
 382
 383         for (i = 0; i < AT_NUM; ++i) {
 384                 kfree(bcs->commands[i]);
 385                 bcs->commands[i] = NULL;
 386                 if (length[i] &&
 387                     !(bcs->commands[i] = kmalloc(length[i], GFP_ATOMIC))) {
 388                         dev_err(bcs->cs->dev, "out of memory\n");
 389                         return -ENOMEM;
 390                 }
 391         }
 392
 393         /* type = 1: extern, 0: intern, 2: recall, 3: door, 4: centrex */
 394         if (sp->phone[0] == '*' && sp->phone[1] == '*') {
 395                 /* internal call: translate ** prefix to CTP value */
 396                 snprintf(bcs->commands[AT_DIAL], length[AT_DIAL],
 397                          "D%s\r", sp->phone+2);
 398                 strncpy(bcs->commands[AT_TYPE], "^SCTP=0\r", length[AT_TYPE]);
 399         } else {
 400                 snprintf(bcs->commands[AT_DIAL], length[AT_DIAL],
 401                          "D%s\r", sp->phone);
 402                 strncpy(bcs->commands[AT_TYPE], "^SCTP=1\r", length[AT_TYPE]);
 403         }
 404
 405         if (bcs->commands[AT_MSN])
 406                 snprintf(bcs->commands[AT_MSN], length[AT_MSN],
 407                          "^SMSN=%s\r", sp->eazmsn);
 408         snprintf(bcs->commands[AT_BC   ], length[AT_BC   ],
 409                  "^SBC=%s\r", bc);
 410         snprintf(bcs->commands[AT_PROTO], length[AT_PROTO],
 411                  "^SBPR=%u\r", proto);
 412         snprintf(bcs->commands[AT_ISO  ], length[AT_ISO  ],
 413                  "^SISO=%u\r", (unsigned)bcs->channel + 1);
 414
 415         return 0;
 416 }
 417
 418 int gigaset_isdn_setup_accept(struct at_state_t *at_state)
 419 {
 420         unsigned proto;
 421         size_t length[AT_NUM];
 422         int i;
 423         struct bc_state *bcs = at_state->bcs;
 424
 425         switch (bcs->proto2) {
 426         case ISDN_PROTO_L2_HDLC:
 427                 proto = 1; /* 0: Bitsynchron, 1: HDLC, 2: voice */
 428                 break;
 429         case ISDN_PROTO_L2_TRANS:
 430                 proto = 2; /* 0: Bitsynchron, 1: HDLC, 2: voice */
 431                 break;
 432         default:
 433                 dev_err(at_state->cs->dev, "%s: invalid protocol: %u\n",
 434                         __func__, bcs->proto2);
 435                 return -EINVAL;
 436         }
 437
 438         length[AT_DIAL ] = 0;
 439         length[AT_MSN  ] = 0;
 440         length[AT_BC   ] = 0;
 441         length[AT_PROTO] = 6 + 1 + 1 + 1; /* proto: 1 character */
 442         length[AT_ISO  ] = 6 + 1 + 1 + 1; /* channel: 1 character */
 443         length[AT_TYPE ] = 0;
 444         length[AT_HLC  ] = 0;
 445
 446         for (i = 0; i < AT_NUM; ++i) {
 447                 kfree(bcs->commands[i]);
 448                 bcs->commands[i] = NULL;
 449                 if (length[i] &&
 450                     !(bcs->commands[i] = kmalloc(length[i], GFP_ATOMIC))) {
 451                         dev_err(at_state->cs->dev, "out of memory\n");
 452                         return -ENOMEM;
 453                 }
 454         }
 455
 456         snprintf(bcs->commands[AT_PROTO], length[AT_PROTO],
 457                  "^SBPR=%u\r", proto);
 458         snprintf(bcs->commands[AT_ISO  ], length[AT_ISO  ],
 459                  "^SISO=%u\r", (unsigned) bcs->channel + 1);
 460
 461         return 0;
 462 }
 463
 464 int gigaset_isdn_icall(struct at_state_t *at_state)
 465 {
 466         struct cardstate *cs = at_state->cs;
 467         struct bc_state *bcs = at_state->bcs;
 468         isdn_ctrl response;
 469         int retval;
 470
 471         /* fill ICALL structure */
 472         response.parm.setup.si1 = 0;    /* default: unknown */
 473         response.parm.setup.si2 = 0;
 474         response.parm.setup.screen = 0; //FIXME how to set these?
 475         response.parm.setup.plan = 0;
 476         if (!at_state->str_var[STR_ZBC]) {
 477                 /* no BC (internal call): assume speech, A-law */
 478                 response.parm.setup.si1 = 1;
 479         } else if (!strcmp(at_state->str_var[STR_ZBC], "8890")) {
 480                 /* unrestricted digital information */
 481                 response.parm.setup.si1 = 7;
 482         } else if (!strcmp(at_state->str_var[STR_ZBC], "8090A3")) {
 483                 /* speech, A-law */
 484                 response.parm.setup.si1 = 1;
 485         } else if (!strcmp(at_state->str_var[STR_ZBC], "9090A3")) {
 486                 /* 3,1 kHz audio, A-law */
 487                 response.parm.setup.si1 = 1;
 488                 response.parm.setup.si2 = 2;
 489         } else {
 490                 dev_warn(cs->dev, "RING ignored - unsupported BC %s\n",
 491                      at_state->str_var[STR_ZBC]);
 492                 return ICALL_IGNORE;
 493         }
 494         if (at_state->str_var[STR_NMBR]) {
 495                 strncpy(response.parm.setup.phone, at_state->str_var[STR_NMBR],
 496                         sizeof response.parm.setup.phone - 1);
 497                 response.parm.setup.phone[sizeof response.parm.setup.phone - 1] = 0;
 498         } else
 499                 response.parm.setup.phone[0] = 0;
 500         if (at_state->str_var[STR_ZCPN]) {
 501                 strncpy(response.parm.setup.eazmsn, at_state->str_var[STR_ZCPN],
 502                         sizeof response.parm.setup.eazmsn - 1);
 503                 response.parm.setup.eazmsn[sizeof response.parm.setup.eazmsn - 1] = 0;
 504         } else
 505                 response.parm.setup.eazmsn[0] = 0;
 506
 507         if (!bcs) {
 508                 dev_notice(cs->dev, "no channel for incoming call\n");
 509                 response.command = ISDN_STAT_ICALLW;
 510                 response.arg = 0; //FIXME
 511         } else {
 512                 gig_dbg(DEBUG_CMD, "Sending ICALL");
 513                 response.command = ISDN_STAT_ICALL;
 514                 response.arg = bcs->channel; //FIXME
 515         }
 516         response.driver = cs->myid;
 517         retval = cs->iif.statcallb(&response);
 518         gig_dbg(DEBUG_CMD, "Response: %d", retval);
 519         switch (retval) {
 520         case 0: /* no takers */
 521                 return ICALL_IGNORE;
 522         case 1: /* alerting */
 523                 bcs->chstate |= CHS_NOTIFY_LL;
 524                 return ICALL_ACCEPT;
 525         case 2: /* reject */
 526                 return ICALL_REJECT;
 527         case 3: /* incomplete */
 528                 dev_warn(cs->dev,
 529                        "LL requested unsupported feature: Incomplete Number\n");
 530                 return ICALL_IGNORE;
 531         case 4: /* proceeding */
 532                 /* Gigaset will send ALERTING anyway.
 533                  * There doesn't seem to be a way to avoid this.
 534                  */
 535                 return ICALL_ACCEPT;
 536         case 5: /* deflect */
 537                 dev_warn(cs->dev,
 538                          "LL requested unsupported feature: Call Deflection\n");
 539                 return ICALL_IGNORE;
 540         default:
 541                 dev_err(cs->dev, "LL error %d on ICALL\n", retval);
 542                 return ICALL_IGNORE;
 543         }
 544 }
 545
 546 /* Set Callback function pointer */
 547 int gigaset_register_to_LL(struct cardstate *cs, const char *isdnid)
 548 {
 549         isdn_if *iif = &cs->iif;
 550
 551         gig_dbg(DEBUG_ANY, "Register driver capabilities to LL");
 552
 553         if (snprintf(iif->id, sizeof iif->id, "%s_%u", isdnid, cs->minor_index)
 554             >= sizeof iif->id) {
 555                 pr_err("ID too long: %s\n", isdnid);
 556                 return 0;
 557         }
 558
 559         iif->owner = THIS_MODULE;
 560         iif->channels = cs->channels;
 561         iif->maxbufsize = MAX_BUF_SIZE;
 562         iif->features = ISDN_FEATURE_L2_TRANS |
 563                 ISDN_FEATURE_L2_HDLC |
 564 #ifdef GIG_X75
 565                 ISDN_FEATURE_L2_X75I |
 566 #endif
 567                 ISDN_FEATURE_L3_TRANS |
 568                 ISDN_FEATURE_P_EURO;
 569         iif->hl_hdrlen = HW_HDR_LEN;            /* Area for storing ack */
 570         iif->command = command_from_LL;
 571         iif->writebuf_skb = writebuf_from_LL;
 572         iif->writecmd = NULL;                   /* Don't support isdnctrl */
 573         iif->readstat = NULL;                   /* Don't support isdnctrl */
 574         iif->rcvcallb_skb = NULL;               /* Will be set by LL */
 575         iif->statcallb = NULL;                  /* Will be set by LL */
 576
 577         if (!register_isdn(iif)) {
 578                 pr_err("register_isdn failed\n");
 579                 return 0;
 580         }
 581
 582         cs->myid = iif->channels;               /* Set my device id */
 583         return 1;
 584 }