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