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#include <linux/isdnif.h> 18 19#define SBUFSIZE 4096 /* sk_buff payload size */ 20#define TRANSBUFSIZE 768 /* bytes per skb for transparent receive */ 21#define HW_HDR_LEN 2 /* Header size used to store ack info */ 22#define MAX_BUF_SIZE (SBUFSIZE - HW_HDR_LEN) /* max data packet from LL */ 23 24/* == Handling of I4L IO =====================================================*/ 25 26/* writebuf_from_LL 27 * called by LL to transmit data on an open channel 28 * inserts the buffer data into the send queue and starts the transmission 29 * Note that this operation must not sleep! 30 * When the buffer is processed completely, gigaset_skb_sent() should be called. 31 * parameters: 32 * driverID driver ID as assigned by LL 33 * channel channel number 34 * ack if != 0 LL wants to be notified on completion via 35 * statcallb(ISDN_STAT_BSENT) 36 * skb skb containing data to send 37 * return value: 38 * number of accepted bytes 39 * 0 if temporarily unable to accept data (out of buffer space) 40 * <0 on error (eg. -EINVAL) 41 */ 42static int writebuf_from_LL(int driverID, int channel, int ack, 43 struct sk_buff *skb) 44{ 45 struct cardstate *cs = gigaset_get_cs_by_id(driverID); 46 struct bc_state *bcs; 47 unsigned char *ack_header; 48 unsigned len; 49 50 if (!cs) { 51 pr_err("%s: invalid driver ID (%d)\n", __func__, driverID); 52 return -ENODEV; 53 } 54 if (channel < 0 || channel >= cs->channels) { 55 dev_err(cs->dev, "%s: invalid channel ID (%d)\n", 56 __func__, channel); 57 return -ENODEV; 58 } 59 bcs = &cs->bcs[channel]; 60 61 /* can only handle linear sk_buffs */ 62 if (skb_linearize(skb) < 0) { 63 dev_err(cs->dev, "%s: skb_linearize failed\n", __func__); 64 return -ENOMEM; 65 } 66 len = skb->len; 67 68 gig_dbg(DEBUG_LLDATA, 69 "Receiving data from LL (id: %d, ch: %d, ack: %d, sz: %d)", 70 driverID, channel, ack, len); 71 72 if (!len) { 73 if (ack) 74 dev_notice(cs->dev, "%s: not ACKing empty packet\n", 75 __func__); 76 return 0; 77 } 78 if (len > MAX_BUF_SIZE) { 79 dev_err(cs->dev, "%s: packet too large (%d bytes)\n", 80 __func__, len); 81 return -EINVAL; 82 } 83 84 /* set up acknowledgement header */ 85 if (skb_headroom(skb) < HW_HDR_LEN) { 86 /* should never happen */ 87 dev_err(cs->dev, "%s: insufficient skb headroom\n", __func__); 88 return -ENOMEM; 89 } 90 skb_set_mac_header(skb, -HW_HDR_LEN); 91 skb->mac_len = HW_HDR_LEN; 92 ack_header = skb_mac_header(skb); 93 if (ack) { 94 ack_header[0] = len & 0xff; 95 ack_header[1] = len >> 8; 96 } else { 97 ack_header[0] = ack_header[1] = 0; 98 } 99 gig_dbg(DEBUG_MCMD, "skb: len=%u, ack=%d: %02x %02x", 100 len, ack, ack_header[0], ack_header[1]); 101 102 /* pass to device-specific module */ 103 return cs->ops->send_skb(bcs, skb); 104} 105 106/** 107 * gigaset_skb_sent() - acknowledge sending an skb 108 * @bcs: B channel descriptor structure. 109 * @skb: sent data. 110 * 111 * Called by hardware module {bas,ser,usb}_gigaset when the data in a 112 * skb has been successfully sent, for signalling completion to the LL. 113 */ 114void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb) 115{ 116 isdn_if *iif = bcs->cs->iif; 117 unsigned char *ack_header = skb_mac_header(skb); 118 unsigned len; 119 isdn_ctrl response; 120 121 ++bcs->trans_up; 122 123 if (skb->len) 124 dev_warn(bcs->cs->dev, "%s: skb->len==%d\n", 125 __func__, skb->len); 126 127 len = ack_header[0] + ((unsigned) ack_header[1] << 8); 128 if (len) { 129 gig_dbg(DEBUG_MCMD, "ACKing to LL (id: %d, ch: %d, sz: %u)", 130 bcs->cs->myid, bcs->channel, len); 131 132 response.driver = bcs->cs->myid; 133 response.command = ISDN_STAT_BSENT; 134 response.arg = bcs->channel; 135 response.parm.length = len; 136 iif->statcallb(&response); 137 } 138} 139EXPORT_SYMBOL_GPL(gigaset_skb_sent); 140 141/** 142 * gigaset_skb_rcvd() - pass received skb to LL 143 * @bcs: B channel descriptor structure. 144 * @skb: received data. 145 * 146 * Called by hardware module {bas,ser,usb}_gigaset when user data has 147 * been successfully received, for passing to the LL. 148 * Warning: skb must not be accessed anymore! 149 */ 150void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb) 151{ 152 isdn_if *iif = bcs->cs->iif; 153 154 iif->rcvcallb_skb(bcs->cs->myid, bcs->channel, skb); 155 bcs->trans_down++; 156} 157EXPORT_SYMBOL_GPL(gigaset_skb_rcvd); 158 159/** 160 * gigaset_isdn_rcv_err() - signal receive error 161 * @bcs: B channel descriptor structure. 162 * 163 * Called by hardware module {bas,ser,usb}_gigaset when a receive error 164 * has occurred, for signalling to the LL. 165 */ 166void gigaset_isdn_rcv_err(struct bc_state *bcs) 167{ 168 isdn_if *iif = bcs->cs->iif; 169 isdn_ctrl response; 170 171 /* if currently ignoring packets, just count down */ 172 if (bcs->ignore) { 173 bcs->ignore--; 174 return; 175 } 176 177 /* update statistics */ 178 bcs->corrupted++; 179 180 /* error -> LL */ 181 gig_dbg(DEBUG_CMD, "sending L1ERR"); 182 response.driver = bcs->cs->myid; 183 response.command = ISDN_STAT_L1ERR; 184 response.arg = bcs->channel; 185 response.parm.errcode = ISDN_STAT_L1ERR_RECV; 186 iif->statcallb(&response); 187} 188EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err); 189 190/* This function will be called by LL to send commands 191 * NOTE: LL ignores the returned value, for commands other than ISDN_CMD_IOCTL, 192 * so don't put too much effort into it. 193 */ 194static int command_from_LL(isdn_ctrl *cntrl) 195{ 196 struct cardstate *cs; 197 struct bc_state *bcs; 198 int retval = 0; 199 char **commands; 200 int ch; 201 int i; 202 size_t l; 203 204 gigaset_debugdrivers(); 205 206 gig_dbg(DEBUG_CMD, "driver: %d, command: %d, arg: 0x%lx", 207 cntrl->driver, cntrl->command, cntrl->arg); 208 209 cs = gigaset_get_cs_by_id(cntrl->driver); 210 if (cs == NULL) { 211 pr_err("%s: invalid driver ID (%d)\n", __func__, cntrl->driver); 212 return -ENODEV; 213 } 214 ch = cntrl->arg & 0xff; 215 216 switch (cntrl->command) { 217 case ISDN_CMD_IOCTL: 218 dev_warn(cs->dev, "ISDN_CMD_IOCTL not supported\n"); 219 return -EINVAL; 220 221 case ISDN_CMD_DIAL: 222 gig_dbg(DEBUG_CMD, 223 "ISDN_CMD_DIAL (phone: %s, msn: %s, si1: %d, si2: %d)", 224 cntrl->parm.setup.phone, cntrl->parm.setup.eazmsn, 225 cntrl->parm.setup.si1, cntrl->parm.setup.si2); 226 227 if (ch >= cs->channels) { 228 dev_err(cs->dev, 229 "ISDN_CMD_DIAL: invalid channel (%d)\n", ch); 230 return -EINVAL; 231 } 232 bcs = cs->bcs + ch; 233 if (!gigaset_get_channel(bcs)) { 234 dev_err(cs->dev, "ISDN_CMD_DIAL: channel not free\n"); 235 return -EBUSY; 236 } 237 switch (bcs->proto2) { 238 case L2_HDLC: 239 bcs->rx_bufsize = SBUFSIZE; 240 break; 241 default: /* assume transparent */ 242 bcs->rx_bufsize = TRANSBUFSIZE; 243 } 244 dev_kfree_skb(bcs->rx_skb); 245 gigaset_new_rx_skb(bcs); 246 247 commands = kzalloc(AT_NUM*(sizeof *commands), GFP_ATOMIC); 248 if (!commands) { 249 gigaset_free_channel(bcs); 250 dev_err(cs->dev, "ISDN_CMD_DIAL: out of memory\n"); 251 return -ENOMEM; 252 } 253 254 l = 3 + strlen(cntrl->parm.setup.phone); 255 commands[AT_DIAL] = kmalloc(l, GFP_ATOMIC); 256 if (!commands[AT_DIAL]) 257 goto oom; 258 if (cntrl->parm.setup.phone[0] == '*' && 259 cntrl->parm.setup.phone[1] == '*') { 260 /* internal call: translate ** prefix to CTP value */ 261 commands[AT_TYPE] = kstrdup("^SCTP=0\r", GFP_ATOMIC); 262 if (!commands[AT_TYPE]) 263 goto oom; 264 snprintf(commands[AT_DIAL], l, 265 "D%s\r", cntrl->parm.setup.phone+2); 266 } else { 267 commands[AT_TYPE] = kstrdup("^SCTP=1\r", GFP_ATOMIC); 268 if (!commands[AT_TYPE]) 269 goto oom; 270 snprintf(commands[AT_DIAL], l, 271 "D%s\r", cntrl->parm.setup.phone); 272 } 273 274 l = strlen(cntrl->parm.setup.eazmsn); 275 if (l) { 276 l += 8; 277 commands[AT_MSN] = kmalloc(l, GFP_ATOMIC); 278 if (!commands[AT_MSN]) 279 goto oom; 280 snprintf(commands[AT_MSN], l, "^SMSN=%s\r", 281 cntrl->parm.setup.eazmsn); 282 } 283 284 switch (cntrl->parm.setup.si1) { 285 case 1: /* audio */ 286 /* BC = 9090A3: 3.1 kHz audio, A-law */ 287 commands[AT_BC] = kstrdup("^SBC=9090A3\r", GFP_ATOMIC); 288 if (!commands[AT_BC]) 289 goto oom; 290 break; 291 case 7: /* data */ 292 default: /* hope the app knows what it is doing */ 293 /* BC = 8890: unrestricted digital information */ 294 commands[AT_BC] = kstrdup("^SBC=8890\r", GFP_ATOMIC); 295 if (!commands[AT_BC]) 296 goto oom; 297 } 298 /* ToDo: other si1 values, inspect si2, set HLC/LLC */ 299 300 commands[AT_PROTO] = kmalloc(9, GFP_ATOMIC); 301 if (!commands[AT_PROTO]) 302 goto oom; 303 snprintf(commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2); 304 305 commands[AT_ISO] = kmalloc(9, GFP_ATOMIC); 306 if (!commands[AT_ISO]) 307 goto oom; 308 snprintf(commands[AT_ISO], 9, "^SISO=%u\r", 309 (unsigned) bcs->channel + 1); 310 311 if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, commands, 312 bcs->at_state.seq_index, NULL)) { 313 for (i = 0; i < AT_NUM; ++i) 314 kfree(commands[i]); 315 kfree(commands); 316 gigaset_free_channel(bcs); 317 return -ENOMEM; 318 } 319 gigaset_schedule_event(cs); 320 break; 321 case ISDN_CMD_ACCEPTD: 322 gig_dbg(DEBUG_CMD, "ISDN_CMD_ACCEPTD"); 323 if (ch >= cs->channels) { 324 dev_err(cs->dev, 325 "ISDN_CMD_ACCEPTD: invalid channel (%d)\n", ch); 326 return -EINVAL; 327 } 328 bcs = cs->bcs + ch; 329 switch (bcs->proto2) { 330 case L2_HDLC: 331 bcs->rx_bufsize = SBUFSIZE; 332 break; 333 default: /* assume transparent */ 334 bcs->rx_bufsize = TRANSBUFSIZE; 335 } 336 dev_kfree_skb(bcs->rx_skb); 337 gigaset_new_rx_skb(bcs); 338 if (!gigaset_add_event(cs, &bcs->at_state, 339 EV_ACCEPT, NULL, 0, NULL)) 340 return -ENOMEM; 341 gigaset_schedule_event(cs); 342 343 break; 344 case ISDN_CMD_HANGUP: 345 gig_dbg(DEBUG_CMD, "ISDN_CMD_HANGUP"); 346 if (ch >= cs->channels) { 347 dev_err(cs->dev, 348 "ISDN_CMD_HANGUP: invalid channel (%d)\n", ch); 349 return -EINVAL; 350 } 351 bcs = cs->bcs + ch; 352 if (!gigaset_add_event(cs, &bcs->at_state, 353 EV_HUP, NULL, 0, NULL)) 354 return -ENOMEM; 355 gigaset_schedule_event(cs); 356 357 break; 358 case ISDN_CMD_CLREAZ: /* Do not signal incoming signals */ 359 dev_info(cs->dev, "ignoring ISDN_CMD_CLREAZ\n"); 360 break; 361 case ISDN_CMD_SETEAZ: /* Signal incoming calls for given MSN */ 362 dev_info(cs->dev, "ignoring ISDN_CMD_SETEAZ (%s)\n", 363 cntrl->parm.num); 364 break; 365 case ISDN_CMD_SETL2: /* Set L2 to given protocol */ 366 if (ch >= cs->channels) { 367 dev_err(cs->dev, 368 "ISDN_CMD_SETL2: invalid channel (%d)\n", ch); 369 return -EINVAL; 370 } 371 bcs = cs->bcs + ch; 372 if (bcs->chstate & CHS_D_UP) { 373 dev_err(cs->dev, 374 "ISDN_CMD_SETL2: channel active (%d)\n", ch); 375 return -EINVAL; 376 } 377 switch (cntrl->arg >> 8) { 378 case ISDN_PROTO_L2_HDLC: 379 gig_dbg(DEBUG_CMD, "ISDN_CMD_SETL2: setting L2_HDLC"); 380 bcs->proto2 = L2_HDLC; 381 break; 382 case ISDN_PROTO_L2_TRANS: 383 gig_dbg(DEBUG_CMD, "ISDN_CMD_SETL2: setting L2_VOICE"); 384 bcs->proto2 = L2_VOICE; 385 break; 386 default: 387 dev_err(cs->dev, 388 "ISDN_CMD_SETL2: unsupported protocol (%lu)\n", 389 cntrl->arg >> 8); 390 return -EINVAL; 391 } 392 break; 393 case ISDN_CMD_SETL3: /* Set L3 to given protocol */ 394 gig_dbg(DEBUG_CMD, "ISDN_CMD_SETL3"); 395 if (ch >= cs->channels) { 396 dev_err(cs->dev, 397 "ISDN_CMD_SETL3: invalid channel (%d)\n", ch); 398 return -EINVAL; 399 } 400 401 if (cntrl->arg >> 8 != ISDN_PROTO_L3_TRANS) { 402 dev_err(cs->dev, 403 "ISDN_CMD_SETL3: unsupported protocol (%lu)\n", 404 cntrl->arg >> 8); 405 return -EINVAL; 406 } 407 408 break; 409 410 default: 411 gig_dbg(DEBUG_CMD, "unknown command %d from LL", 412 cntrl->command); 413 return -EINVAL; 414 } 415 416 return retval; 417 418oom: 419 dev_err(bcs->cs->dev, "out of memory\n"); 420 for (i = 0; i < AT_NUM; ++i) 421 kfree(commands[i]); 422 kfree(commands); 423 gigaset_free_channel(bcs); 424 return -ENOMEM; 425} 426 427static void gigaset_i4l_cmd(struct cardstate *cs, int cmd) 428{ 429 isdn_if *iif = cs->iif; 430 isdn_ctrl command; 431 432 command.driver = cs->myid; 433 command.command = cmd; 434 command.arg = 0; 435 iif->statcallb(&command); 436} 437 438static void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd) 439{ 440 isdn_if *iif = bcs->cs->iif; 441 isdn_ctrl command; 442 443 command.driver = bcs->cs->myid; 444 command.command = cmd; 445 command.arg = bcs->channel; 446 iif->statcallb(&command); 447} 448 449/** 450 * gigaset_isdn_icall() - signal incoming call 451 * @at_state: connection state structure. 452 * 453 * Called by main module to notify the LL that an incoming call has been 454 * received. @at_state contains the parameters of the call. 455 * 456 * Return value: call disposition (ICALL_*) 457 */ 458int gigaset_isdn_icall(struct at_state_t *at_state) 459{ 460 struct cardstate *cs = at_state->cs; 461 struct bc_state *bcs = at_state->bcs; 462 isdn_if *iif = cs->iif; 463 isdn_ctrl response; 464 int retval; 465 466 /* fill ICALL structure */ 467 response.parm.setup.si1 = 0; /* default: unknown */ 468 response.parm.setup.si2 = 0; 469 response.parm.setup.screen = 0; 470 response.parm.setup.plan = 0; 471 if (!at_state->str_var[STR_ZBC]) { 472 /* no BC (internal call): assume speech, A-law */ 473 response.parm.setup.si1 = 1; 474 } else if (!strcmp(at_state->str_var[STR_ZBC], "8890")) { 475 /* unrestricted digital information */ 476 response.parm.setup.si1 = 7; 477 } else if (!strcmp(at_state->str_var[STR_ZBC], "8090A3")) { 478 /* speech, A-law */ 479 response.parm.setup.si1 = 1; 480 } else if (!strcmp(at_state->str_var[STR_ZBC], "9090A3")) { 481 /* 3,1 kHz audio, A-law */ 482 response.parm.setup.si1 = 1; 483 response.parm.setup.si2 = 2; 484 } else { 485 dev_warn(cs->dev, "RING ignored - unsupported BC %s\n", 486 at_state->str_var[STR_ZBC]); 487 return ICALL_IGNORE; 488 } 489 if (at_state->str_var[STR_NMBR]) { 490 strlcpy(response.parm.setup.phone, at_state->str_var[STR_NMBR], 491 sizeof response.parm.setup.phone); 492 } else 493 response.parm.setup.phone[0] = 0; 494 if (at_state->str_var[STR_ZCPN]) { 495 strlcpy(response.parm.setup.eazmsn, at_state->str_var[STR_ZCPN], 496 sizeof response.parm.setup.eazmsn); 497 } else 498 response.parm.setup.eazmsn[0] = 0; 499 500 if (!bcs) { 501 dev_notice(cs->dev, "no channel for incoming call\n"); 502 response.command = ISDN_STAT_ICALLW; 503 response.arg = 0; 504 } else { 505 gig_dbg(DEBUG_CMD, "Sending ICALL"); 506 response.command = ISDN_STAT_ICALL; 507 response.arg = bcs->channel; 508 } 509 response.driver = cs->myid; 510 retval = iif->statcallb(&response); 511 gig_dbg(DEBUG_CMD, "Response: %d", retval); 512 switch (retval) { 513 case 0: /* no takers */ 514 return ICALL_IGNORE; 515 case 1: /* alerting */ 516 bcs->chstate |= CHS_NOTIFY_LL; 517 return ICALL_ACCEPT; 518 case 2: /* reject */ 519 return ICALL_REJECT; 520 case 3: /* incomplete */ 521 dev_warn(cs->dev, 522 "LL requested unsupported feature: Incomplete Number\n"); 523 return ICALL_IGNORE; 524 case 4: /* proceeding */ 525 /* Gigaset will send ALERTING anyway. 526 * There doesn't seem to be a way to avoid this. 527 */ 528 return ICALL_ACCEPT; 529 case 5: /* deflect */ 530 dev_warn(cs->dev, 531 "LL requested unsupported feature: Call Deflection\n"); 532 return ICALL_IGNORE; 533 default: 534 dev_err(cs->dev, "LL error %d on ICALL\n", retval); 535 return ICALL_IGNORE; 536 } 537} 538 539/** 540 * gigaset_isdn_connD() - signal D channel connect 541 * @bcs: B channel descriptor structure. 542 * 543 * Called by main module to notify the LL that the D channel connection has 544 * been established. 545 */ 546void gigaset_isdn_connD(struct bc_state *bcs) 547{ 548 gig_dbg(DEBUG_CMD, "sending DCONN"); 549 gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN); 550} 551 552/** 553 * gigaset_isdn_hupD() - signal D channel hangup 554 * @bcs: B channel descriptor structure. 555 * 556 * Called by main module to notify the LL that the D channel connection has 557 * been shut down. 558 */ 559void gigaset_isdn_hupD(struct bc_state *bcs) 560{ 561 gig_dbg(DEBUG_CMD, "sending DHUP"); 562 gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DHUP); 563} 564 565/** 566 * gigaset_isdn_connB() - signal B channel connect 567 * @bcs: B channel descriptor structure. 568 * 569 * Called by main module to notify the LL that the B channel connection has 570 * been established. 571 */ 572void gigaset_isdn_connB(struct bc_state *bcs) 573{ 574 gig_dbg(DEBUG_CMD, "sending BCONN"); 575 gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BCONN); 576} 577 578/** 579 * gigaset_isdn_hupB() - signal B channel hangup 580 * @bcs: B channel descriptor structure. 581 * 582 * Called by main module to notify the LL that the B channel connection has 583 * been shut down. 584 */ 585void gigaset_isdn_hupB(struct bc_state *bcs) 586{ 587 gig_dbg(DEBUG_CMD, "sending BHUP"); 588 gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BHUP); 589} 590 591/** 592 * gigaset_isdn_start() - signal device availability 593 * @cs: device descriptor structure. 594 * 595 * Called by main module to notify the LL that the device is available for 596 * use. 597 */ 598void gigaset_isdn_start(struct cardstate *cs) 599{ 600 gig_dbg(DEBUG_CMD, "sending RUN"); 601 gigaset_i4l_cmd(cs, ISDN_STAT_RUN); 602} 603 604/** 605 * gigaset_isdn_stop() - signal device unavailability 606 * @cs: device descriptor structure. 607 * 608 * Called by main module to notify the LL that the device is no longer 609 * available for use. 610 */ 611void gigaset_isdn_stop(struct cardstate *cs) 612{ 613 gig_dbg(DEBUG_CMD, "sending STOP"); 614 gigaset_i4l_cmd(cs, ISDN_STAT_STOP); 615} 616 617/** 618 * gigaset_isdn_regdev() - register to LL 619 * @cs: device descriptor structure. 620 * @isdnid: device name. 621 * 622 * Return value: 1 for success, 0 for failure 623 */ 624int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid) 625{ 626 isdn_if *iif; 627 628 pr_info("ISDN4Linux interface\n"); 629 630 iif = kmalloc(sizeof *iif, GFP_KERNEL); 631 if (!iif) { 632 pr_err("out of memory\n"); 633 return 0; 634 } 635 636 if (snprintf(iif->id, sizeof iif->id, "%s_%u", isdnid, cs->minor_index) 637 >= sizeof iif->id) { 638 pr_err("ID too long: %s\n", isdnid); 639 kfree(iif); 640 return 0; 641 } 642 643 iif->owner = THIS_MODULE; 644 iif->channels = cs->channels; 645 iif->maxbufsize = MAX_BUF_SIZE; 646 iif->features = ISDN_FEATURE_L2_TRANS | 647 ISDN_FEATURE_L2_HDLC | 648 ISDN_FEATURE_L2_X75I | 649 ISDN_FEATURE_L3_TRANS | 650 ISDN_FEATURE_P_EURO; 651 iif->hl_hdrlen = HW_HDR_LEN; /* Area for storing ack */ 652 iif->command = command_from_LL; 653 iif->writebuf_skb = writebuf_from_LL; 654 iif->writecmd = NULL; /* Don't support isdnctrl */ 655 iif->readstat = NULL; /* Don't support isdnctrl */ 656 iif->rcvcallb_skb = NULL; /* Will be set by LL */ 657 iif->statcallb = NULL; /* Will be set by LL */ 658 659 if (!register_isdn(iif)) { 660 pr_err("register_isdn failed\n"); 661 kfree(iif); 662 return 0; 663 } 664 665 cs->iif = iif; 666 cs->myid = iif->channels; /* Set my device id */ 667 cs->hw_hdr_len = HW_HDR_LEN; 668 return 1; 669} 670 671/** 672 * gigaset_isdn_unregdev() - unregister device from LL 673 * @cs: device descriptor structure. 674 */ 675void gigaset_isdn_unregdev(struct cardstate *cs) 676{ 677 gig_dbg(DEBUG_CMD, "sending UNLOAD"); 678 gigaset_i4l_cmd(cs, ISDN_STAT_UNLOAD); 679 kfree(cs->iif); 680 cs->iif = NULL; 681} 682 683/** 684 * gigaset_isdn_regdrv() - register driver to LL 685 */ 686void gigaset_isdn_regdrv(void) 687{ 688 /* nothing to do */ 689} 690 691/** 692 * gigaset_isdn_unregdrv() - unregister driver from LL 693 */ 694void gigaset_isdn_unregdrv(void) 695{ 696 /* nothing to do */ 697} 698