drivers/isdn/gigaset/capi.c

   1 /*
   2  * Kernel CAPI interface for the Gigaset driver
   3  *
   4  * Copyright (c) 2009 by Tilman Schmidt <tilman@imap.cc>.
   5  *
   6  * =====================================================================
   7  *      This program is free software; you can redistribute it and/or
   8  *      modify it under the terms of the GNU General Public License as
   9  *      published by the Free Software Foundation; either version 2 of
  10  *      the License, or (at your option) any later version.
  11  * =====================================================================
  12  */
  13
  14 #include "gigaset.h"
  15 #include <linux/proc_fs.h>
  16 #include <linux/seq_file.h>
  17 #include <linux/isdn/capilli.h>
  18 #include <linux/isdn/capicmd.h>
  19 #include <linux/isdn/capiutil.h>
  20
  21 /* missing from kernelcapi.h */
  22 #define CapiNcpiNotSupportedByProtocol  0x0001
  23 #define CapiFlagsNotSupportedByProtocol 0x0002
  24 #define CapiAlertAlreadySent            0x0003
  25 #define CapiFacilitySpecificFunctionNotSupported        0x3011
  26
  27 /* missing from capicmd.h */
  28 #define CAPI_CONNECT_IND_BASELEN        (CAPI_MSG_BASELEN+4+2+8*1)
  29 #define CAPI_CONNECT_ACTIVE_IND_BASELEN (CAPI_MSG_BASELEN+4+3*1)
  30 #define CAPI_CONNECT_B3_IND_BASELEN     (CAPI_MSG_BASELEN+4+1)
  31 #define CAPI_CONNECT_B3_ACTIVE_IND_BASELEN      (CAPI_MSG_BASELEN+4+1)
  32 #define CAPI_DATA_B3_REQ_LEN64          (CAPI_MSG_BASELEN+4+4+2+2+2+8)
  33 #define CAPI_DATA_B3_CONF_LEN           (CAPI_MSG_BASELEN+4+2+2)
  34 #define CAPI_DISCONNECT_IND_LEN         (CAPI_MSG_BASELEN+4+2)
  35 #define CAPI_DISCONNECT_B3_IND_BASELEN  (CAPI_MSG_BASELEN+4+2+1)
  36 #define CAPI_FACILITY_CONF_BASELEN      (CAPI_MSG_BASELEN+4+2+2+1)
  37 /* most _CONF messages contain only Controller/PLCI/NCCI and Info parameters */
  38 #define CAPI_STDCONF_LEN                (CAPI_MSG_BASELEN+4+2)
  39
  40 #define CAPI_FACILITY_HANDSET   0x0000
  41 #define CAPI_FACILITY_DTMF      0x0001
  42 #define CAPI_FACILITY_V42BIS    0x0002
  43 #define CAPI_FACILITY_SUPPSVC   0x0003
  44 #define CAPI_FACILITY_WAKEUP    0x0004
  45 #define CAPI_FACILITY_LI        0x0005
  46
  47 #define CAPI_SUPPSVC_GETSUPPORTED       0x0000
  48
  49 /* missing from capiutil.h */
  50 #define CAPIMSG_PLCI_PART(m)    CAPIMSG_U8(m, 9)
  51 #define CAPIMSG_NCCI_PART(m)    CAPIMSG_U16(m, 10)
  52 #define CAPIMSG_HANDLE_REQ(m)   CAPIMSG_U16(m, 18) /* DATA_B3_REQ/_IND only! */
  53 #define CAPIMSG_FLAGS(m)        CAPIMSG_U16(m, 20)
  54 #define CAPIMSG_SETCONTROLLER(m, contr) capimsg_setu8(m, 8, contr)
  55 #define CAPIMSG_SETPLCI_PART(m, plci)   capimsg_setu8(m, 9, plci)
  56 #define CAPIMSG_SETNCCI_PART(m, ncci)   capimsg_setu16(m, 10, ncci)
  57 #define CAPIMSG_SETFLAGS(m, flags)      capimsg_setu16(m, 20, flags)
  58
  59 /* parameters with differing location in DATA_B3_CONF/_RESP: */
  60 #define CAPIMSG_SETHANDLE_CONF(m, handle)       capimsg_setu16(m, 12, handle)
  61 #define CAPIMSG_SETINFO_CONF(m, info)           capimsg_setu16(m, 14, info)
  62
  63 /* Flags (DATA_B3_REQ/_IND) */
  64 #define CAPI_FLAGS_DELIVERY_CONFIRMATION        0x04
  65 #define CAPI_FLAGS_RESERVED                     (~0x1f)
  66
  67 /* buffer sizes */
  68 #define MAX_BC_OCTETS 11
  69 #define MAX_HLC_OCTETS 3
  70 #define MAX_NUMBER_DIGITS 20
  71 #define MAX_FMT_IE_LEN 20
  72
  73 /* values for gigaset_capi_appl.connected */
  74 #define APCONN_NONE     0       /* inactive/listening */
  75 #define APCONN_SETUP    1       /* connecting */
  76 #define APCONN_ACTIVE   2       /* B channel up */
  77
  78 /* registered application data structure */
  79 struct gigaset_capi_appl {
  80         struct list_head ctrlist;
  81         struct gigaset_capi_appl *bcnext;
  82         u16 id;
  83         struct capi_register_params rp;
  84         u16 nextMessageNumber;
  85         u32 listenInfoMask;
  86         u32 listenCIPmask;
  87         int connected;
  88 };
  89
  90 /* CAPI specific controller data structure */
  91 struct gigaset_capi_ctr {
  92         struct capi_ctr ctr;
  93         struct list_head appls;
  94         struct sk_buff_head sendqueue;
  95         atomic_t sendqlen;
  96         /* two _cmsg structures possibly used concurrently: */
  97         _cmsg hcmsg;    /* for message composition triggered from hardware */
  98         _cmsg acmsg;    /* for dissection of messages sent from application */
  99         u8 bc_buf[MAX_BC_OCTETS+1];
 100         u8 hlc_buf[MAX_HLC_OCTETS+1];
 101         u8 cgpty_buf[MAX_NUMBER_DIGITS+3];
 102         u8 cdpty_buf[MAX_NUMBER_DIGITS+2];
 103 };
 104
 105 /* CIP Value table (from CAPI 2.0 standard, ch. 6.1) */
 106 static struct {
 107         u8 *bc;
 108         u8 *hlc;
 109 } cip2bchlc[] = {
 110         [1] = { "8090A3", NULL },
 111                 /* Speech (A-law) */
 112         [2] = { "8890", NULL },
 113                 /* Unrestricted digital information */
 114         [3] = { "8990", NULL },
 115                 /* Restricted digital information */
 116         [4] = { "9090A3", NULL },
 117                 /* 3,1 kHz audio (A-law) */
 118         [5] = { "9190", NULL },
 119                 /* 7 kHz audio */
 120         [6] = { "9890", NULL },
 121                 /* Video */
 122         [7] = { "88C0C6E6", NULL },
 123                 /* Packet mode */
 124         [8] = { "8890218F", NULL },
 125                 /* 56 kbit/s rate adaptation */
 126         [9] = { "9190A5", NULL },
 127                 /* Unrestricted digital information with tones/announcements */
 128         [16] = { "8090A3", "9181" },
 129                 /* Telephony */
 130         [17] = { "9090A3", "9184" },
 131                 /* Group 2/3 facsimile */
 132         [18] = { "8890", "91A1" },
 133                 /* Group 4 facsimile Class 1 */
 134         [19] = { "8890", "91A4" },
 135                 /* Teletex service basic and mixed mode
 136                    and Group 4 facsimile service Classes II and III */
 137         [20] = { "8890", "91A8" },
 138                 /* Teletex service basic and processable mode */
 139         [21] = { "8890", "91B1" },
 140                 /* Teletex service basic mode */
 141         [22] = { "8890", "91B2" },
 142                 /* International interworking for Videotex */
 143         [23] = { "8890", "91B5" },
 144                 /* Telex */
 145         [24] = { "8890", "91B8" },
 146                 /* Message Handling Systems in accordance with X.400 */
 147         [25] = { "8890", "91C1" },
 148                 /* OSI application in accordance with X.200 */
 149         [26] = { "9190A5", "9181" },
 150                 /* 7 kHz telephony */
 151         [27] = { "9190A5", "916001" },
 152                 /* Video telephony, first connection */
 153         [28] = { "8890", "916002" },
 154                 /* Video telephony, second connection */
 155 };
 156
 157 /*
 158  * helper functions
 159  * ================
 160  */
 161
 162 /*
 163  * emit unsupported parameter warning
 164  */
 165 static inline void ignore_cstruct_param(struct cardstate *cs, _cstruct param,
 166                                        char *msgname, char *paramname)
 167 {
 168         if (param && *param)
 169                 dev_warn(cs->dev, "%s: ignoring unsupported parameter: %s\n",
 170                          msgname, paramname);
 171 }
 172
 173 /*
 174  * convert an IE from Gigaset hex string to ETSI binary representation
 175  * including length byte
 176  * return value: result length, -1 on error
 177  */
 178 static int encode_ie(char *in, u8 *out, int maxlen)
 179 {
 180         int l = 0;
 181         while (*in) {
 182                 if (!isxdigit(in[0]) || !isxdigit(in[1]) || l >= maxlen)
 183                         return -1;
 184                 out[++l] = (hex_to_bin(in[0]) << 4) + hex_to_bin(in[1]);
 185                 in += 2;
 186         }
 187         out[0] = l;
 188         return l;
 189 }
 190
 191 /*
 192  * convert an IE from ETSI binary representation including length byte
 193  * to Gigaset hex string
 194  */
 195 static void decode_ie(u8 *in, char *out)
 196 {
 197         int i = *in;
 198         while (i-- > 0) {
 199                 /* ToDo: conversion to upper case necessary? */
 200                 *out++ = toupper(hex_asc_hi(*++in));
 201                 *out++ = toupper(hex_asc_lo(*in));
 202         }
 203 }
 204
 205 /*
 206  * retrieve application data structure for an application ID
 207  */
 208 static inline struct gigaset_capi_appl *
 209 get_appl(struct gigaset_capi_ctr *iif, u16 appl)
 210 {
 211         struct gigaset_capi_appl *ap;
 212
 213         list_for_each_entry(ap, &iif->appls, ctrlist)
 214                 if (ap->id == appl)
 215                         return ap;
 216         return NULL;
 217 }
 218
 219 /*
 220  * dump CAPI message to kernel messages for debugging
 221  */
 222 static inline void dump_cmsg(enum debuglevel level, const char *tag, _cmsg *p)
 223 {
 224 #ifdef CONFIG_GIGASET_DEBUG
 225         _cdebbuf *cdb;
 226
 227         if (!(gigaset_debuglevel & level))
 228                 return;
 229
 230         cdb = capi_cmsg2str(p);
 231         if (cdb) {
 232                 gig_dbg(level, "%s: [%d] %s", tag, p->ApplId, cdb->buf);
 233                 cdebbuf_free(cdb);
 234         } else {
 235                 gig_dbg(level, "%s: [%d] %s", tag, p->ApplId,
 236                         capi_cmd2str(p->Command, p->Subcommand));
 237         }
 238 #endif
 239 }
 240
 241 static inline void dump_rawmsg(enum debuglevel level, const char *tag,
 242                                unsigned char *data)
 243 {
 244 #ifdef CONFIG_GIGASET_DEBUG
 245         char *dbgline;
 246         int i, l;
 247
 248         if (!(gigaset_debuglevel & level))
 249                 return;
 250
 251         l = CAPIMSG_LEN(data);
 252         if (l < 12) {
 253                 gig_dbg(level, "%s: ??? LEN=%04d", tag, l);
 254                 return;
 255         }
 256         gig_dbg(level, "%s: 0x%02x:0x%02x: ID=%03d #0x%04x LEN=%04d NCCI=0x%x",
 257                 tag, CAPIMSG_COMMAND(data), CAPIMSG_SUBCOMMAND(data),
 258                 CAPIMSG_APPID(data), CAPIMSG_MSGID(data), l,
 259                 CAPIMSG_CONTROL(data));
 260         l -= 12;
 261         dbgline = kmalloc(3*l, GFP_ATOMIC);
 262         if (!dbgline)
 263                 return;
 264         for (i = 0; i < l; i++) {
 265                 dbgline[3*i] = hex_asc_hi(data[12+i]);
 266                 dbgline[3*i+1] = hex_asc_lo(data[12+i]);
 267                 dbgline[3*i+2] = ' ';
 268         }
 269         dbgline[3*l-1] = '\0';
 270         gig_dbg(level, "  %s", dbgline);
 271         kfree(dbgline);
 272         if (CAPIMSG_COMMAND(data) == CAPI_DATA_B3 &&
 273             (CAPIMSG_SUBCOMMAND(data) == CAPI_REQ ||
 274              CAPIMSG_SUBCOMMAND(data) == CAPI_IND) &&
 275             CAPIMSG_DATALEN(data) > 0) {
 276                 l = CAPIMSG_DATALEN(data);
 277                 dbgline = kmalloc(3*l, GFP_ATOMIC);
 278                 if (!dbgline)
 279                         return;
 280                 data += CAPIMSG_LEN(data);
 281                 for (i = 0; i < l; i++) {
 282                         dbgline[3*i] = hex_asc_hi(data[i]);
 283                         dbgline[3*i+1] = hex_asc_lo(data[i]);
 284                         dbgline[3*i+2] = ' ';
 285                 }
 286                 dbgline[3*l-1] = '\0';
 287                 gig_dbg(level, "  %s", dbgline);
 288                 kfree(dbgline);
 289         }
 290 #endif
 291 }
 292
 293 /*
 294  * format CAPI IE as string
 295  */
 296
 297 static const char *format_ie(const char *ie)
 298 {
 299         static char result[3*MAX_FMT_IE_LEN];
 300         int len, count;
 301         char *pout = result;
 302
 303         if (!ie)
 304                 return "NULL";
 305
 306         count = len = ie[0];
 307         if (count > MAX_FMT_IE_LEN)
 308                 count = MAX_FMT_IE_LEN-1;
 309         while (count--) {
 310                 *pout++ = hex_asc_hi(*++ie);
 311                 *pout++ = hex_asc_lo(*ie);
 312                 *pout++ = ' ';
 313         }
 314         if (len > MAX_FMT_IE_LEN) {
 315                 *pout++ = '.';
 316                 *pout++ = '.';
 317                 *pout++ = '.';
 318         }
 319         *--pout = 0;
 320         return result;
 321 }
 322
 323 /*
 324  * emit DATA_B3_CONF message
 325  */
 326 static void send_data_b3_conf(struct cardstate *cs, struct capi_ctr *ctr,
 327                               u16 appl, u16 msgid, int channel,
 328                               u16 handle, u16 info)
 329 {
 330         struct sk_buff *cskb;
 331         u8 *msg;
 332
 333         cskb = alloc_skb(CAPI_DATA_B3_CONF_LEN, GFP_ATOMIC);
 334         if (!cskb) {
 335                 dev_err(cs->dev, "%s: out of memory\n", __func__);
 336                 return;
 337         }
 338         /* frequent message, avoid _cmsg overhead */
 339         msg = __skb_put(cskb, CAPI_DATA_B3_CONF_LEN);
 340         CAPIMSG_SETLEN(msg, CAPI_DATA_B3_CONF_LEN);
 341         CAPIMSG_SETAPPID(msg, appl);
 342         CAPIMSG_SETCOMMAND(msg, CAPI_DATA_B3);
 343         CAPIMSG_SETSUBCOMMAND(msg,  CAPI_CONF);
 344         CAPIMSG_SETMSGID(msg, msgid);
 345         CAPIMSG_SETCONTROLLER(msg, ctr->cnr);
 346         CAPIMSG_SETPLCI_PART(msg, channel);
 347         CAPIMSG_SETNCCI_PART(msg, 1);
 348         CAPIMSG_SETHANDLE_CONF(msg, handle);
 349         CAPIMSG_SETINFO_CONF(msg, info);
 350
 351         /* emit message */
 352         dump_rawmsg(DEBUG_MCMD, __func__, msg);
 353         capi_ctr_handle_message(ctr, appl, cskb);
 354 }
 355
 356
 357 /*
 358  * driver interface functions
 359  * ==========================
 360  */
 361
 362 /**
 363  * gigaset_skb_sent() - acknowledge transmission of outgoing skb
 364  * @bcs:        B channel descriptor structure.
 365  * @skb:        sent data.
 366  *
 367  * Called by hardware module {bas,ser,usb}_gigaset when the data in a
 368  * skb has been successfully sent, for signalling completion to the LL.
 369  */
 370 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *dskb)
 371 {
 372         struct cardstate *cs = bcs->cs;
 373         struct gigaset_capi_ctr *iif = cs->iif;
 374         struct gigaset_capi_appl *ap = bcs->ap;
 375         unsigned char *req = skb_mac_header(dskb);
 376         u16 flags;
 377
 378         /* update statistics */
 379         ++bcs->trans_up;
 380
 381         if (!ap) {
 382                 dev_err(cs->dev, "%s: no application\n", __func__);
 383                 return;
 384         }
 385
 386         /* don't send further B3 messages if disconnected */
 387         if (ap->connected < APCONN_ACTIVE) {
 388                 gig_dbg(DEBUG_LLDATA, "disconnected, discarding ack");
 389                 return;
 390         }
 391
 392         /*
 393          * send DATA_B3_CONF if "delivery confirmation" bit was set in request;
 394          * otherwise it has already been sent by do_data_b3_req()
 395          */
 396         flags = CAPIMSG_FLAGS(req);
 397         if (flags & CAPI_FLAGS_DELIVERY_CONFIRMATION)
 398                 send_data_b3_conf(cs, &iif->ctr, ap->id, CAPIMSG_MSGID(req),
 399                                   bcs->channel + 1, CAPIMSG_HANDLE_REQ(req),
 400                                   (flags & ~CAPI_FLAGS_DELIVERY_CONFIRMATION) ?
 401                                         CapiFlagsNotSupportedByProtocol :
 402                                         CAPI_NOERROR);
 403 }
 404 EXPORT_SYMBOL_GPL(gigaset_skb_sent);
 405
 406 /**
 407  * gigaset_skb_rcvd() - pass received skb to LL
 408  * @bcs:        B channel descriptor structure.
 409  * @skb:        received data.
 410  *
 411  * Called by hardware module {bas,ser,usb}_gigaset when user data has
 412  * been successfully received, for passing to the LL.
 413  * Warning: skb must not be accessed anymore!
 414  */
 415 void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)
 416 {
 417         struct cardstate *cs = bcs->cs;
 418         struct gigaset_capi_ctr *iif = cs->iif;
 419         struct gigaset_capi_appl *ap = bcs->ap;
 420         int len = skb->len;
 421
 422         /* update statistics */
 423         bcs->trans_down++;
 424
 425         if (!ap) {
 426                 dev_err(cs->dev, "%s: no application\n", __func__);
 427                 return;
 428         }
 429
 430         /* don't send further B3 messages if disconnected */
 431         if (ap->connected < APCONN_ACTIVE) {
 432                 gig_dbg(DEBUG_LLDATA, "disconnected, discarding data");
 433                 dev_kfree_skb_any(skb);
 434                 return;
 435         }
 436
 437         /*
 438          * prepend DATA_B3_IND message to payload
 439          * Parameters: NCCI = 1, all others 0/unused
 440          * frequent message, avoid _cmsg overhead
 441          */
 442         skb_push(skb, CAPI_DATA_B3_REQ_LEN);
 443         CAPIMSG_SETLEN(skb->data, CAPI_DATA_B3_REQ_LEN);
 444         CAPIMSG_SETAPPID(skb->data, ap->id);
 445         CAPIMSG_SETCOMMAND(skb->data, CAPI_DATA_B3);
 446         CAPIMSG_SETSUBCOMMAND(skb->data,  CAPI_IND);
 447         CAPIMSG_SETMSGID(skb->data, ap->nextMessageNumber++);
 448         CAPIMSG_SETCONTROLLER(skb->data, iif->ctr.cnr);
 449         CAPIMSG_SETPLCI_PART(skb->data, bcs->channel + 1);
 450         CAPIMSG_SETNCCI_PART(skb->data, 1);
 451         /* Data parameter not used */
 452         CAPIMSG_SETDATALEN(skb->data, len);
 453         /* Data handle parameter not used */
 454         CAPIMSG_SETFLAGS(skb->data, 0);
 455         /* Data64 parameter not present */
 456
 457         /* emit message */
 458         dump_rawmsg(DEBUG_LLDATA, "DATA_B3_IND", skb->data);
 459         capi_ctr_handle_message(&iif->ctr, ap->id, skb);
 460 }
 461 EXPORT_SYMBOL_GPL(gigaset_skb_rcvd);
 462
 463 /**
 464  * gigaset_isdn_rcv_err() - signal receive error
 465  * @bcs:        B channel descriptor structure.
 466  *
 467  * Called by hardware module {bas,ser,usb}_gigaset when a receive error
 468  * has occurred, for signalling to the LL.
 469  */
 470 void gigaset_isdn_rcv_err(struct bc_state *bcs)
 471 {
 472         /* if currently ignoring packets, just count down */
 473         if (bcs->ignore) {
 474                 bcs->ignore--;
 475                 return;
 476         }
 477
 478         /* update statistics */
 479         bcs->corrupted++;
 480
 481         /* ToDo: signal error -> LL */
 482 }
 483 EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err);
 484
 485 /**
 486  * gigaset_isdn_icall() - signal incoming call
 487  * @at_state:   connection state structure.
 488  *
 489  * Called by main module at tasklet level to notify the LL that an incoming
 490  * call has been received. @at_state contains the parameters of the call.
 491  *
 492  * Return value: call disposition (ICALL_*)
 493  */
 494 int gigaset_isdn_icall(struct at_state_t *at_state)
 495 {
 496         struct cardstate *cs = at_state->cs;
 497         struct bc_state *bcs = at_state->bcs;
 498         struct gigaset_capi_ctr *iif = cs->iif;
 499         struct gigaset_capi_appl *ap;
 500         u32 actCIPmask;
 501         struct sk_buff *skb;
 502         unsigned int msgsize;
 503         int i;
 504
 505         /*
 506          * ToDo: signal calls without a free B channel, too
 507          * (requires a u8 handle for the at_state structure that can
 508          * be stored in the PLCI and used in the CONNECT_RESP message
 509          * handler to retrieve it)
 510          */
 511         if (!bcs)
 512                 return ICALL_IGNORE;
 513
 514         /* prepare CONNECT_IND message, using B channel number as PLCI */
 515         capi_cmsg_header(&iif->hcmsg, 0, CAPI_CONNECT, CAPI_IND, 0,
 516                          iif->ctr.cnr | ((bcs->channel + 1) << 8));
 517
 518         /* minimum size, all structs empty */
 519         msgsize = CAPI_CONNECT_IND_BASELEN;
 520
 521         /* Bearer Capability (mandatory) */
 522         if (at_state->str_var[STR_ZBC]) {
 523                 /* pass on BC from Gigaset */
 524                 if (encode_ie(at_state->str_var[STR_ZBC], iif->bc_buf,
 525                               MAX_BC_OCTETS) < 0) {
 526                         dev_warn(cs->dev, "RING ignored - bad BC %s\n",
 527                                  at_state->str_var[STR_ZBC]);
 528                         return ICALL_IGNORE;
 529                 }
 530
 531                 /* look up corresponding CIP value */
 532                 iif->hcmsg.CIPValue = 0;        /* default if nothing found */
 533                 for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
 534                         if (cip2bchlc[i].bc != NULL &&
 535                             cip2bchlc[i].hlc == NULL &&
 536                             !strcmp(cip2bchlc[i].bc,
 537                                     at_state->str_var[STR_ZBC])) {
 538                                 iif->hcmsg.CIPValue = i;
 539                                 break;
 540                         }
 541         } else {
 542                 /* no BC (internal call): assume CIP 1 (speech, A-law) */
 543                 iif->hcmsg.CIPValue = 1;
 544                 encode_ie(cip2bchlc[1].bc, iif->bc_buf, MAX_BC_OCTETS);
 545         }
 546         iif->hcmsg.BC = iif->bc_buf;
 547         msgsize += iif->hcmsg.BC[0];
 548
 549         /* High Layer Compatibility (optional) */
 550         if (at_state->str_var[STR_ZHLC]) {
 551                 /* pass on HLC from Gigaset */
 552                 if (encode_ie(at_state->str_var[STR_ZHLC], iif->hlc_buf,
 553                               MAX_HLC_OCTETS) < 0) {
 554                         dev_warn(cs->dev, "RING ignored - bad HLC %s\n",
 555                                  at_state->str_var[STR_ZHLC]);
 556                         return ICALL_IGNORE;
 557                 }
 558                 iif->hcmsg.HLC = iif->hlc_buf;
 559                 msgsize += iif->hcmsg.HLC[0];
 560
 561                 /* look up corresponding CIP value */
 562                 /* keep BC based CIP value if none found */
 563                 if (at_state->str_var[STR_ZBC])
 564                         for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
 565                                 if (cip2bchlc[i].hlc != NULL &&
 566                                     !strcmp(cip2bchlc[i].hlc,
 567                                             at_state->str_var[STR_ZHLC]) &&
 568                                     !strcmp(cip2bchlc[i].bc,
 569                                             at_state->str_var[STR_ZBC])) {
 570                                         iif->hcmsg.CIPValue = i;
 571                                         break;
 572                                 }
 573         }
 574
 575         /* Called Party Number (optional) */
 576         if (at_state->str_var[STR_ZCPN]) {
 577                 i = strlen(at_state->str_var[STR_ZCPN]);
 578                 if (i > MAX_NUMBER_DIGITS) {
 579                         dev_warn(cs->dev, "RING ignored - bad number %s\n",
 580                                  at_state->str_var[STR_ZBC]);
 581                         return ICALL_IGNORE;
 582                 }
 583                 iif->cdpty_buf[0] = i + 1;
 584                 iif->cdpty_buf[1] = 0x80; /* type / numbering plan unknown */
 585                 memcpy(iif->cdpty_buf+2, at_state->str_var[STR_ZCPN], i);
 586                 iif->hcmsg.CalledPartyNumber = iif->cdpty_buf;
 587                 msgsize += iif->hcmsg.CalledPartyNumber[0];
 588         }
 589
 590         /* Calling Party Number (optional) */
 591         if (at_state->str_var[STR_NMBR]) {
 592                 i = strlen(at_state->str_var[STR_NMBR]);
 593                 if (i > MAX_NUMBER_DIGITS) {
 594                         dev_warn(cs->dev, "RING ignored - bad number %s\n",
 595                                  at_state->str_var[STR_ZBC]);
 596                         return ICALL_IGNORE;
 597                 }
 598                 iif->cgpty_buf[0] = i + 2;
 599                 iif->cgpty_buf[1] = 0x00; /* type / numbering plan unknown */
 600                 iif->cgpty_buf[2] = 0x80; /* pres. allowed, not screened */
 601                 memcpy(iif->cgpty_buf+3, at_state->str_var[STR_NMBR], i);
 602                 iif->hcmsg.CallingPartyNumber = iif->cgpty_buf;
 603                 msgsize += iif->hcmsg.CallingPartyNumber[0];
 604         }
 605
 606         /* remaining parameters (not supported, always left NULL):
 607          * - CalledPartySubaddress
 608          * - CallingPartySubaddress
 609          * - AdditionalInfo
 610          *   - BChannelinformation
 611          *   - Keypadfacility
 612          *   - Useruserdata
 613          *   - Facilitydataarray
 614          */
 615
 616         gig_dbg(DEBUG_CMD, "icall: PLCI %x CIP %d BC %s",
 617                 iif->hcmsg.adr.adrPLCI, iif->hcmsg.CIPValue,
 618                 format_ie(iif->hcmsg.BC));
 619         gig_dbg(DEBUG_CMD, "icall: HLC %s",
 620                 format_ie(iif->hcmsg.HLC));
 621         gig_dbg(DEBUG_CMD, "icall: CgPty %s",
 622                 format_ie(iif->hcmsg.CallingPartyNumber));
 623         gig_dbg(DEBUG_CMD, "icall: CdPty %s",
 624                 format_ie(iif->hcmsg.CalledPartyNumber));
 625
 626         /* scan application list for matching listeners */
 627         bcs->ap = NULL;
 628         actCIPmask = 1 | (1 << iif->hcmsg.CIPValue);
 629         list_for_each_entry(ap, &iif->appls, ctrlist)
 630                 if (actCIPmask & ap->listenCIPmask) {
 631                         /* build CONNECT_IND message for this application */
 632                         iif->hcmsg.ApplId = ap->id;
 633                         iif->hcmsg.Messagenumber = ap->nextMessageNumber++;
 634
 635                         skb = alloc_skb(msgsize, GFP_ATOMIC);
 636                         if (!skb) {
 637                                 dev_err(cs->dev, "%s: out of memory\n",
 638                                         __func__);
 639                                 break;
 640                         }
 641                         capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
 642                         dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
 643
 644                         /* add to listeners on this B channel, update state */
 645                         ap->bcnext = bcs->ap;
 646                         bcs->ap = ap;
 647                         bcs->chstate |= CHS_NOTIFY_LL;
 648                         ap->connected = APCONN_SETUP;
 649
 650                         /* emit message */
 651                         capi_ctr_handle_message(&iif->ctr, ap->id, skb);
 652                 }
 653
 654         /*
 655          * Return "accept" if any listeners.
 656          * Gigaset will send ALERTING.
 657          * There doesn't seem to be a way to avoid this.
 658          */
 659         return bcs->ap ? ICALL_ACCEPT : ICALL_IGNORE;
 660 }
 661
 662 /*
 663  * send a DISCONNECT_IND message to an application
 664  * does not sleep, clobbers the controller's hcmsg structure
 665  */
 666 static void send_disconnect_ind(struct bc_state *bcs,
 667                                 struct gigaset_capi_appl *ap, u16 reason)
 668 {
 669         struct cardstate *cs = bcs->cs;
 670         struct gigaset_capi_ctr *iif = cs->iif;
 671         struct sk_buff *skb;
 672
 673         if (ap->connected == APCONN_NONE)
 674                 return;
 675
 676         capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT, CAPI_IND,
 677                          ap->nextMessageNumber++,
 678                          iif->ctr.cnr | ((bcs->channel + 1) << 8));
 679         iif->hcmsg.Reason = reason;
 680         skb = alloc_skb(CAPI_DISCONNECT_IND_LEN, GFP_ATOMIC);
 681         if (!skb) {
 682                 dev_err(cs->dev, "%s: out of memory\n", __func__);
 683                 return;
 684         }
 685         capi_cmsg2message(&iif->hcmsg, __skb_put(skb, CAPI_DISCONNECT_IND_LEN));
 686         dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
 687         ap->connected = APCONN_NONE;
 688         capi_ctr_handle_message(&iif->ctr, ap->id, skb);
 689 }
 690
 691 /*
 692  * send a DISCONNECT_B3_IND message to an application
 693  * Parameters: NCCI = 1, NCPI empty, Reason_B3 = 0
 694  * does not sleep, clobbers the controller's hcmsg structure
 695  */
 696 static void send_disconnect_b3_ind(struct bc_state *bcs,
 697                                    struct gigaset_capi_appl *ap)
 698 {
 699         struct cardstate *cs = bcs->cs;
 700         struct gigaset_capi_ctr *iif = cs->iif;
 701         struct sk_buff *skb;
 702
 703         /* nothing to do if no logical connection active */
 704         if (ap->connected < APCONN_ACTIVE)
 705                 return;
 706         ap->connected = APCONN_SETUP;
 707
 708         capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
 709                          ap->nextMessageNumber++,
 710                          iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
 711         skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_ATOMIC);
 712         if (!skb) {
 713                 dev_err(cs->dev, "%s: out of memory\n", __func__);
 714                 return;
 715         }
 716         capi_cmsg2message(&iif->hcmsg,
 717                           __skb_put(skb, CAPI_DISCONNECT_B3_IND_BASELEN));
 718         dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
 719         capi_ctr_handle_message(&iif->ctr, ap->id, skb);
 720 }
 721
 722 /**
 723  * gigaset_isdn_connD() - signal D channel connect
 724  * @bcs:        B channel descriptor structure.
 725  *
 726  * Called by main module at tasklet level to notify the LL that the D channel
 727  * connection has been established.
 728  */
 729 void gigaset_isdn_connD(struct bc_state *bcs)
 730 {
 731         struct cardstate *cs = bcs->cs;
 732         struct gigaset_capi_ctr *iif = cs->iif;
 733         struct gigaset_capi_appl *ap = bcs->ap;
 734         struct sk_buff *skb;
 735         unsigned int msgsize;
 736
 737         if (!ap) {
 738                 dev_err(cs->dev, "%s: no application\n", __func__);
 739                 return;
 740         }
 741         while (ap->bcnext) {
 742                 /* this should never happen */
 743                 dev_warn(cs->dev, "%s: dropping extra application %u\n",
 744                          __func__, ap->bcnext->id);
 745                 send_disconnect_ind(bcs, ap->bcnext,
 746                                     CapiCallGivenToOtherApplication);
 747                 ap->bcnext = ap->bcnext->bcnext;
 748         }
 749         if (ap->connected == APCONN_NONE) {
 750                 dev_warn(cs->dev, "%s: application %u not connected\n",
 751                          __func__, ap->id);
 752                 return;
 753         }
 754
 755         /* prepare CONNECT_ACTIVE_IND message
 756          * Note: LLC not supported by device
 757          */
 758         capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_CONNECT_ACTIVE, CAPI_IND,
 759                          ap->nextMessageNumber++,
 760                          iif->ctr.cnr | ((bcs->channel + 1) << 8));
 761
 762         /* minimum size, all structs empty */
 763         msgsize = CAPI_CONNECT_ACTIVE_IND_BASELEN;
 764
 765         /* ToDo: set parameter: Connected number
 766          * (requires ev-layer state machine extension to collect
 767          * ZCON device reply)
 768          */
 769
 770         /* build and emit CONNECT_ACTIVE_IND message */
 771         skb = alloc_skb(msgsize, GFP_ATOMIC);
 772         if (!skb) {
 773                 dev_err(cs->dev, "%s: out of memory\n", __func__);
 774                 return;
 775         }
 776         capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
 777         dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
 778         capi_ctr_handle_message(&iif->ctr, ap->id, skb);
 779 }
 780
 781 /**
 782  * gigaset_isdn_hupD() - signal D channel hangup
 783  * @bcs:        B channel descriptor structure.
 784  *
 785  * Called by main module at tasklet level to notify the LL that the D channel
 786  * connection has been shut down.
 787  */
 788 void gigaset_isdn_hupD(struct bc_state *bcs)
 789 {
 790         struct gigaset_capi_appl *ap;
 791
 792         /*
 793          * ToDo: pass on reason code reported by device
 794          * (requires ev-layer state machine extension to collect
 795          * ZCAU device reply)
 796          */
 797         for (ap = bcs->ap; ap != NULL; ap = ap->bcnext) {
 798                 send_disconnect_b3_ind(bcs, ap);
 799                 send_disconnect_ind(bcs, ap, 0);
 800         }
 801         bcs->ap = NULL;
 802 }
 803
 804 /**
 805  * gigaset_isdn_connB() - signal B channel connect
 806  * @bcs:        B channel descriptor structure.
 807  *
 808  * Called by main module at tasklet level to notify the LL that the B channel
 809  * connection has been established.
 810  */
 811 void gigaset_isdn_connB(struct bc_state *bcs)
 812 {
 813         struct cardstate *cs = bcs->cs;
 814         struct gigaset_capi_ctr *iif = cs->iif;
 815         struct gigaset_capi_appl *ap = bcs->ap;
 816         struct sk_buff *skb;
 817         unsigned int msgsize;
 818         u8 command;
 819
 820         if (!ap) {
 821                 dev_err(cs->dev, "%s: no application\n", __func__);
 822                 return;
 823         }
 824         while (ap->bcnext) {
 825                 /* this should never happen */
 826                 dev_warn(cs->dev, "%s: dropping extra application %u\n",
 827                          __func__, ap->bcnext->id);
 828                 send_disconnect_ind(bcs, ap->bcnext,
 829                                     CapiCallGivenToOtherApplication);
 830                 ap->bcnext = ap->bcnext->bcnext;
 831         }
 832         if (!ap->connected) {
 833                 dev_warn(cs->dev, "%s: application %u not connected\n",
 834                          __func__, ap->id);
 835                 return;
 836         }
 837
 838         /*
 839          * emit CONNECT_B3_ACTIVE_IND if we already got CONNECT_B3_REQ;
 840          * otherwise we have to emit CONNECT_B3_IND first, and follow up with
 841          * CONNECT_B3_ACTIVE_IND in reply to CONNECT_B3_RESP
 842          * Parameters in both cases always: NCCI = 1, NCPI empty
 843          */
 844         if (ap->connected >= APCONN_ACTIVE) {
 845                 command = CAPI_CONNECT_B3_ACTIVE;
 846                 msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
 847         } else {
 848                 command = CAPI_CONNECT_B3;
 849                 msgsize = CAPI_CONNECT_B3_IND_BASELEN;
 850         }
 851         capi_cmsg_header(&iif->hcmsg, ap->id, command, CAPI_IND,
 852                          ap->nextMessageNumber++,
 853                          iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
 854         skb = alloc_skb(msgsize, GFP_ATOMIC);
 855         if (!skb) {
 856                 dev_err(cs->dev, "%s: out of memory\n", __func__);
 857                 return;
 858         }
 859         capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
 860         dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
 861         ap->connected = APCONN_ACTIVE;
 862         capi_ctr_handle_message(&iif->ctr, ap->id, skb);
 863 }
 864
 865 /**
 866  * gigaset_isdn_hupB() - signal B channel hangup
 867  * @bcs:        B channel descriptor structure.
 868  *
 869  * Called by main module to notify the LL that the B channel connection has
 870  * been shut down.
 871  */
 872 void gigaset_isdn_hupB(struct bc_state *bcs)
 873 {
 874         struct cardstate *cs = bcs->cs;
 875         struct gigaset_capi_appl *ap = bcs->ap;
 876
 877         /* ToDo: assure order of DISCONNECT_B3_IND and DISCONNECT_IND ? */
 878
 879         if (!ap) {
 880                 dev_err(cs->dev, "%s: no application\n", __func__);
 881                 return;
 882         }
 883
 884         send_disconnect_b3_ind(bcs, ap);
 885 }
 886
 887 /**
 888  * gigaset_isdn_start() - signal device availability
 889  * @cs:         device descriptor structure.
 890  *
 891  * Called by main module to notify the LL that the device is available for
 892  * use.
 893  */
 894 void gigaset_isdn_start(struct cardstate *cs)
 895 {
 896         struct gigaset_capi_ctr *iif = cs->iif;
 897
 898         /* fill profile data: manufacturer name */
 899         strcpy(iif->ctr.manu, "Siemens");
 900         /* CAPI and device version */
 901         iif->ctr.version.majorversion = 2;              /* CAPI 2.0 */
 902         iif->ctr.version.minorversion = 0;
 903         /* ToDo: check/assert cs->gotfwver? */
 904         iif->ctr.version.majormanuversion = cs->fwver[0];
 905         iif->ctr.version.minormanuversion = cs->fwver[1];
 906         /* number of B channels supported */
 907         iif->ctr.profile.nbchannel = cs->channels;
 908         /* global options: internal controller, supplementary services */
 909         iif->ctr.profile.goptions = 0x11;
 910         /* B1 protocols: 64 kbit/s HDLC or transparent */
 911         iif->ctr.profile.support1 =  0x03;
 912         /* B2 protocols: transparent only */
 913         /* ToDo: X.75 SLP ? */
 914         iif->ctr.profile.support2 =  0x02;
 915         /* B3 protocols: transparent only */
 916         iif->ctr.profile.support3 =  0x01;
 917         /* no serial number */
 918         strcpy(iif->ctr.serial, "0");
 919         capi_ctr_ready(&iif->ctr);
 920 }
 921
 922 /**
 923  * gigaset_isdn_stop() - signal device unavailability
 924  * @cs:         device descriptor structure.
 925  *
 926  * Called by main module to notify the LL that the device is no longer
 927  * available for use.
 928  */
 929 void gigaset_isdn_stop(struct cardstate *cs)
 930 {
 931         struct gigaset_capi_ctr *iif = cs->iif;
 932         capi_ctr_down(&iif->ctr);
 933 }
 934
 935 /*
 936  * kernel CAPI callback methods
 937  * ============================
 938  */
 939
 940 /*
 941  * register CAPI application
 942  */
 943 static void gigaset_register_appl(struct capi_ctr *ctr, u16 appl,
 944                            capi_register_params *rp)
 945 {
 946         struct gigaset_capi_ctr *iif
 947                 = container_of(ctr, struct gigaset_capi_ctr, ctr);
 948         struct cardstate *cs = ctr->driverdata;
 949         struct gigaset_capi_appl *ap;
 950
 951         list_for_each_entry(ap, &iif->appls, ctrlist)
 952                 if (ap->id == appl) {
 953                         dev_notice(cs->dev,
 954                                    "application %u already registered\n", appl);
 955                         return;
 956                 }
 957
 958         ap = kzalloc(sizeof(*ap), GFP_KERNEL);
 959         if (!ap) {
 960                 dev_err(cs->dev, "%s: out of memory\n", __func__);
 961                 return;
 962         }
 963         ap->id = appl;
 964         ap->rp = *rp;
 965
 966         list_add(&ap->ctrlist, &iif->appls);
 967 }
 968
 969 /*
 970  * release CAPI application
 971  */
 972 static void gigaset_release_appl(struct capi_ctr *ctr, u16 appl)
 973 {
 974         struct gigaset_capi_ctr *iif
 975                 = container_of(ctr, struct gigaset_capi_ctr, ctr);
 976         struct cardstate *cs = iif->ctr.driverdata;
 977         struct gigaset_capi_appl *ap, *tmp;
 978
 979         list_for_each_entry_safe(ap, tmp, &iif->appls, ctrlist)
 980                 if (ap->id == appl) {
 981                         if (ap->connected != APCONN_NONE) {
 982                                 dev_err(cs->dev,
 983                                         "%s: application %u still connected\n",
 984                                         __func__, ap->id);
 985                                 /* ToDo: clear active connection */
 986                         }
 987                         list_del(&ap->ctrlist);
 988                         kfree(ap);
 989                 }
 990
 991 }
 992
 993 /*
 994  * =====================================================================
 995  * outgoing CAPI message handler
 996  * =====================================================================
 997  */
 998
 999 /*
1000  * helper function: emit reply message with given Info value
1001  */
1002 static void send_conf(struct gigaset_capi_ctr *iif,
1003                       struct gigaset_capi_appl *ap,
1004                       struct sk_buff *skb,
1005                       u16 info)
1006 {
1007         /*
1008          * _CONF replies always only have NCCI and Info parameters
1009          * so they'll fit into the _REQ message skb
1010          */
1011         capi_cmsg_answer(&iif->acmsg);
1012         iif->acmsg.Info = info;
1013         capi_cmsg2message(&iif->acmsg, skb->data);
1014         __skb_trim(skb, CAPI_STDCONF_LEN);
1015         dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1016         capi_ctr_handle_message(&iif->ctr, ap->id, skb);
1017 }
1018
1019 /*
1020  * process FACILITY_REQ message
1021  */
1022 static void do_facility_req(struct gigaset_capi_ctr *iif,
1023                             struct gigaset_capi_appl *ap,
1024                             struct sk_buff *skb)
1025 {
1026         struct cardstate *cs = iif->ctr.driverdata;
1027         _cmsg *cmsg = &iif->acmsg;
1028         struct sk_buff *cskb;
1029         u8 *pparam;
1030         unsigned int msgsize = CAPI_FACILITY_CONF_BASELEN;
1031         u16 function, info;
1032         static u8 confparam[10];        /* max. 9 octets + length byte */
1033
1034         /* decode message */
1035         capi_message2cmsg(cmsg, skb->data);
1036         dump_cmsg(DEBUG_CMD, __func__, cmsg);
1037
1038         /*
1039          * Facility Request Parameter is not decoded by capi_message2cmsg()
1040          * encoding depends on Facility Selector
1041          */
1042         switch (cmsg->FacilitySelector) {
1043         case CAPI_FACILITY_DTMF:        /* ToDo */
1044                 info = CapiFacilityNotSupported;
1045                 confparam[0] = 2;       /* length */
1046                 /* DTMF information: Unknown DTMF request */
1047                 capimsg_setu16(confparam, 1, 2);
1048                 break;
1049
1050         case CAPI_FACILITY_V42BIS:      /* not supported */
1051                 info = CapiFacilityNotSupported;
1052                 confparam[0] = 2;       /* length */
1053                 /* V.42 bis information: not available */
1054                 capimsg_setu16(confparam, 1, 1);
1055                 break;
1056
1057         case CAPI_FACILITY_SUPPSVC:
1058                 /* decode Function parameter */
1059                 pparam = cmsg->FacilityRequestParameter;
1060                 if (pparam == NULL || *pparam < 2) {
1061                         dev_notice(cs->dev, "%s: %s missing\n", "FACILITY_REQ",
1062                                    "Facility Request Parameter");
1063                         send_conf(iif, ap, skb, CapiIllMessageParmCoding);
1064                         return;
1065                 }
1066                 function = CAPIMSG_U16(pparam, 1);
1067                 switch (function) {
1068                 case CAPI_SUPPSVC_GETSUPPORTED:
1069                         info = CapiSuccess;
1070                         /* Supplementary Service specific parameter */
1071                         confparam[3] = 6;       /* length */
1072                         /* Supplementary services info: Success */
1073                         capimsg_setu16(confparam, 4, CapiSuccess);
1074                         /* Supported Services: none */
1075                         capimsg_setu32(confparam, 6, 0);
1076                         break;
1077                 /* ToDo: add supported services */
1078                 default:
1079                         info = CapiFacilitySpecificFunctionNotSupported;
1080                         /* Supplementary Service specific parameter */
1081                         confparam[3] = 2;       /* length */
1082                         /* Supplementary services info: not supported */
1083                         capimsg_setu16(confparam, 4,
1084                                        CapiSupplementaryServiceNotSupported);
1085                 }
1086
1087                 /* Facility confirmation parameter */
1088                 confparam[0] = confparam[3] + 3;        /* total length */
1089                 /* Function: copy from _REQ message */
1090                 capimsg_setu16(confparam, 1, function);
1091                 /* Supplementary Service specific parameter already set above */
1092                 break;
1093
1094         case CAPI_FACILITY_WAKEUP:      /* ToDo */
1095                 info = CapiFacilityNotSupported;
1096                 confparam[0] = 2;       /* length */
1097                 /* Number of accepted awake request parameters: 0 */
1098                 capimsg_setu16(confparam, 1, 0);
1099                 break;
1100
1101         default:
1102                 info = CapiFacilityNotSupported;
1103                 confparam[0] = 0;       /* empty struct */
1104         }
1105
1106         /* send FACILITY_CONF with given Info and confirmation parameter */
1107         capi_cmsg_answer(cmsg);
1108         cmsg->Info = info;
1109         cmsg->FacilityConfirmationParameter = confparam;
1110         msgsize += confparam[0];        /* length */
1111         cskb = alloc_skb(msgsize, GFP_ATOMIC);
1112         if (!cskb) {
1113                 dev_err(cs->dev, "%s: out of memory\n", __func__);
1114                 return;
1115         }
1116         capi_cmsg2message(cmsg, __skb_put(cskb, msgsize));
1117         dump_cmsg(DEBUG_CMD, __func__, cmsg);
1118         capi_ctr_handle_message(&iif->ctr, ap->id, cskb);
1119 }
1120
1121
1122 /*
1123  * process LISTEN_REQ message
1124  * just store the masks in the application data structure
1125  */
1126 static void do_listen_req(struct gigaset_capi_ctr *iif,
1127                           struct gigaset_capi_appl *ap,
1128                           struct sk_buff *skb)
1129 {
1130         /* decode message */
1131         capi_message2cmsg(&iif->acmsg, skb->data);
1132         dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1133
1134         /* store listening parameters */
1135         ap->listenInfoMask = iif->acmsg.InfoMask;
1136         ap->listenCIPmask = iif->acmsg.CIPmask;
1137         send_conf(iif, ap, skb, CapiSuccess);
1138 }
1139
1140 /*
1141  * process ALERT_REQ message
1142  * nothing to do, Gigaset always alerts anyway
1143  */
1144 static void do_alert_req(struct gigaset_capi_ctr *iif,
1145                          struct gigaset_capi_appl *ap,
1146                          struct sk_buff *skb)
1147 {
1148         /* decode message */
1149         capi_message2cmsg(&iif->acmsg, skb->data);
1150         dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1151         send_conf(iif, ap, skb, CapiAlertAlreadySent);
1152 }
1153
1154 /*
1155  * process CONNECT_REQ message
1156  * allocate a B channel, prepare dial commands, queue a DIAL event,
1157  * emit CONNECT_CONF reply
1158  */
1159 static void do_connect_req(struct gigaset_capi_ctr *iif,
1160                            struct gigaset_capi_appl *ap,
1161                            struct sk_buff *skb)
1162 {
1163         struct cardstate *cs = iif->ctr.driverdata;
1164         _cmsg *cmsg = &iif->acmsg;
1165         struct bc_state *bcs;
1166         char **commands;
1167         char *s;
1168         u8 *pp;
1169         int i, l, lbc, lhlc;
1170         u16 info;
1171
1172         /* decode message */
1173         capi_message2cmsg(cmsg, skb->data);
1174         dump_cmsg(DEBUG_CMD, __func__, cmsg);
1175
1176         /* get free B channel & construct PLCI */
1177         bcs = gigaset_get_free_channel(cs);
1178         if (!bcs) {
1179                 dev_notice(cs->dev, "%s: no B channel available\n",
1180                            "CONNECT_REQ");
1181                 send_conf(iif, ap, skb, CapiNoPlciAvailable);
1182                 return;
1183         }
1184         ap->bcnext = NULL;
1185         bcs->ap = ap;
1186         bcs->rx_bufsize = ap->rp.datablklen;
1187         dev_kfree_skb(bcs->rx_skb);
1188         gigaset_new_rx_skb(bcs);
1189         cmsg->adr.adrPLCI |= (bcs->channel + 1) << 8;
1190
1191         /* build command table */
1192         commands = kzalloc(AT_NUM*(sizeof *commands), GFP_KERNEL);
1193         if (!commands)
1194                 goto oom;
1195
1196         /* encode parameter: Called party number */
1197         pp = cmsg->CalledPartyNumber;
1198         if (pp == NULL || *pp == 0) {
1199                 dev_notice(cs->dev, "%s: %s missing\n",
1200                            "CONNECT_REQ", "Called party number");
1201                 info = CapiIllMessageParmCoding;
1202                 goto error;
1203         }
1204         l = *pp++;
1205         /* check type of number/numbering plan byte */
1206         switch (*pp) {
1207         case 0x80:      /* unknown type / unknown numbering plan */
1208         case 0x81:      /* unknown type / ISDN/Telephony numbering plan */
1209                 break;
1210         default:        /* others: warn about potential misinterpretation */
1211                 dev_notice(cs->dev, "%s: %s type/plan 0x%02x unsupported\n",
1212                            "CONNECT_REQ", "Called party number", *pp);
1213         }
1214         pp++;
1215         l--;
1216         /* translate "**" internal call prefix to CTP value */
1217         if (l >= 2 && pp[0] == '*' && pp[1] == '*') {
1218                 s = "^SCTP=0\r";
1219                 pp += 2;
1220                 l -= 2;
1221         } else {
1222                 s = "^SCTP=1\r";
1223         }
1224         commands[AT_TYPE] = kstrdup(s, GFP_KERNEL);
1225         if (!commands[AT_TYPE])
1226                 goto oom;
1227         commands[AT_DIAL] = kmalloc(l+3, GFP_KERNEL);
1228         if (!commands[AT_DIAL])
1229                 goto oom;
1230         snprintf(commands[AT_DIAL], l+3, "D%.*s\r", l, pp);
1231
1232         /* encode parameter: Calling party number */
1233         pp = cmsg->CallingPartyNumber;
1234         if (pp != NULL && *pp > 0) {
1235                 l = *pp++;
1236
1237                 /* check type of number/numbering plan byte */
1238                 /* ToDo: allow for/handle Ext=1? */
1239                 switch (*pp) {
1240                 case 0x00:      /* unknown type / unknown numbering plan */
1241                 case 0x01:      /* unknown type / ISDN/Telephony num. plan */
1242                         break;
1243                 default:
1244                         dev_notice(cs->dev,
1245                                    "%s: %s type/plan 0x%02x unsupported\n",
1246                                    "CONNECT_REQ", "Calling party number", *pp);
1247                 }
1248                 pp++;
1249                 l--;
1250
1251                 /* check presentation indicator */
1252                 if (!l) {
1253                         dev_notice(cs->dev, "%s: %s IE truncated\n",
1254                                    "CONNECT_REQ", "Calling party number");
1255                         info = CapiIllMessageParmCoding;
1256                         goto error;
1257                 }
1258                 switch (*pp & 0xfc) { /* ignore Screening indicator */
1259                 case 0x80:      /* Presentation allowed */
1260                         s = "^SCLIP=1\r";
1261                         break;
1262                 case 0xa0:      /* Presentation restricted */
1263                         s = "^SCLIP=0\r";
1264                         break;
1265                 default:
1266                         dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1267                                    "CONNECT_REQ",
1268                                    "Presentation/Screening indicator",
1269                                    *pp);
1270                         s = "^SCLIP=1\r";
1271                 }
1272                 commands[AT_CLIP] = kstrdup(s, GFP_KERNEL);
1273                 if (!commands[AT_CLIP])
1274                         goto oom;
1275                 pp++;
1276                 l--;
1277
1278                 if (l) {
1279                         /* number */
1280                         commands[AT_MSN] = kmalloc(l+8, GFP_KERNEL);
1281                         if (!commands[AT_MSN])
1282                                 goto oom;
1283                         snprintf(commands[AT_MSN], l+8, "^SMSN=%*s\r", l, pp);
1284                 }
1285         }
1286
1287         /* check parameter: CIP Value */
1288         if (cmsg->CIPValue >= ARRAY_SIZE(cip2bchlc) ||
1289             (cmsg->CIPValue > 0 && cip2bchlc[cmsg->CIPValue].bc == NULL)) {
1290                 dev_notice(cs->dev, "%s: unknown CIP value %d\n",
1291                            "CONNECT_REQ", cmsg->CIPValue);
1292                 info = CapiCipValueUnknown;
1293                 goto error;
1294         }
1295
1296         /*
1297          * check/encode parameters: BC & HLC
1298          * must be encoded together as device doesn't accept HLC separately
1299          * explicit parameters override values derived from CIP
1300          */
1301
1302         /* determine lengths */
1303         if (cmsg->BC && cmsg->BC[0])            /* BC specified explicitly */
1304                 lbc = 2*cmsg->BC[0];
1305         else if (cip2bchlc[cmsg->CIPValue].bc)  /* BC derived from CIP */
1306                 lbc = strlen(cip2bchlc[cmsg->CIPValue].bc);
1307         else                                    /* no BC */
1308                 lbc = 0;
1309         if (cmsg->HLC && cmsg->HLC[0])          /* HLC specified explicitly */
1310                 lhlc = 2*cmsg->HLC[0];
1311         else if (cip2bchlc[cmsg->CIPValue].hlc) /* HLC derived from CIP */
1312                 lhlc = strlen(cip2bchlc[cmsg->CIPValue].hlc);
1313         else                                    /* no HLC */
1314                 lhlc = 0;
1315
1316         if (lbc) {
1317                 /* have BC: allocate and assemble command string */
1318                 l = lbc + 7;            /* "^SBC=" + value + "\r" + null byte */
1319                 if (lhlc)
1320                         l += lhlc + 7;  /* ";^SHLC=" + value */
1321                 commands[AT_BC] = kmalloc(l, GFP_KERNEL);
1322                 if (!commands[AT_BC])
1323                         goto oom;
1324                 strcpy(commands[AT_BC], "^SBC=");
1325                 if (cmsg->BC && cmsg->BC[0])    /* BC specified explicitly */
1326                         decode_ie(cmsg->BC, commands[AT_BC] + 5);
1327                 else                            /* BC derived from CIP */
1328                         strcpy(commands[AT_BC] + 5,
1329                                cip2bchlc[cmsg->CIPValue].bc);
1330                 if (lhlc) {
1331                         strcpy(commands[AT_BC] + lbc + 5, ";^SHLC=");
1332                         if (cmsg->HLC && cmsg->HLC[0])
1333                                 /* HLC specified explicitly */
1334                                 decode_ie(cmsg->HLC,
1335                                           commands[AT_BC] + lbc + 12);
1336                         else    /* HLC derived from CIP */
1337                                 strcpy(commands[AT_BC] + lbc + 12,
1338                                        cip2bchlc[cmsg->CIPValue].hlc);
1339                 }
1340                 strcpy(commands[AT_BC] + l - 2, "\r");
1341         } else {
1342                 /* no BC */
1343                 if (lhlc) {
1344                         dev_notice(cs->dev, "%s: cannot set HLC without BC\n",
1345                                    "CONNECT_REQ");
1346                         info = CapiIllMessageParmCoding; /* ? */
1347                         goto error;
1348                 }
1349         }
1350
1351         /* check/encode parameter: B Protocol */
1352         if (cmsg->BProtocol == CAPI_DEFAULT) {
1353                 bcs->proto2 = L2_HDLC;
1354                 dev_warn(cs->dev,
1355                     "B2 Protocol X.75 SLP unsupported, using Transparent\n");
1356         } else {
1357                 switch (cmsg->B1protocol) {
1358                 case 0:
1359                         bcs->proto2 = L2_HDLC;
1360                         break;
1361                 case 1:
1362                         bcs->proto2 = L2_VOICE;
1363                         break;
1364                 default:
1365                         dev_warn(cs->dev,
1366                             "B1 Protocol %u unsupported, using Transparent\n",
1367                                  cmsg->B1protocol);
1368                         bcs->proto2 = L2_VOICE;
1369                 }
1370                 if (cmsg->B2protocol != 1)
1371                         dev_warn(cs->dev,
1372                             "B2 Protocol %u unsupported, using Transparent\n",
1373                                  cmsg->B2protocol);
1374                 if (cmsg->B3protocol != 0)
1375                         dev_warn(cs->dev,
1376                             "B3 Protocol %u unsupported, using Transparent\n",
1377                                  cmsg->B3protocol);
1378                 ignore_cstruct_param(cs, cmsg->B1configuration,
1379                                         "CONNECT_REQ", "B1 Configuration");
1380                 ignore_cstruct_param(cs, cmsg->B2configuration,
1381                                         "CONNECT_REQ", "B2 Configuration");
1382                 ignore_cstruct_param(cs, cmsg->B3configuration,
1383                                         "CONNECT_REQ", "B3 Configuration");
1384         }
1385         commands[AT_PROTO] = kmalloc(9, GFP_KERNEL);
1386         if (!commands[AT_PROTO])
1387                 goto oom;
1388         snprintf(commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
1389
1390         /* ToDo: check/encode remaining parameters */
1391         ignore_cstruct_param(cs, cmsg->CalledPartySubaddress,
1392                                         "CONNECT_REQ", "Called pty subaddr");
1393         ignore_cstruct_param(cs, cmsg->CallingPartySubaddress,
1394                                         "CONNECT_REQ", "Calling pty subaddr");
1395         ignore_cstruct_param(cs, cmsg->LLC,
1396                                         "CONNECT_REQ", "LLC");
1397         if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1398                 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1399                                         "CONNECT_REQ", "B Channel Information");
1400                 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1401                                         "CONNECT_REQ", "Keypad Facility");
1402                 ignore_cstruct_param(cs, cmsg->Useruserdata,
1403                                         "CONNECT_REQ", "User-User Data");
1404                 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1405                                         "CONNECT_REQ", "Facility Data Array");
1406         }
1407
1408         /* encode parameter: B channel to use */
1409         commands[AT_ISO] = kmalloc(9, GFP_KERNEL);
1410         if (!commands[AT_ISO])
1411                 goto oom;
1412         snprintf(commands[AT_ISO], 9, "^SISO=%u\r",
1413                  (unsigned) bcs->channel + 1);
1414
1415         /* queue & schedule EV_DIAL event */
1416         if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, commands,
1417                                bcs->at_state.seq_index, NULL)) {
1418                 info = CAPI_MSGOSRESOURCEERR;
1419                 goto error;
1420         }
1421         gigaset_schedule_event(cs);
1422         ap->connected = APCONN_SETUP;
1423         send_conf(iif, ap, skb, CapiSuccess);
1424         return;
1425
1426 oom:
1427         dev_err(cs->dev, "%s: out of memory\n", __func__);
1428         info = CAPI_MSGOSRESOURCEERR;
1429 error:
1430         if (commands)
1431                 for (i = 0; i < AT_NUM; i++)
1432                         kfree(commands[i]);
1433         kfree(commands);
1434         gigaset_free_channel(bcs);
1435         send_conf(iif, ap, skb, info);
1436 }
1437
1438 /*
1439  * process CONNECT_RESP message
1440  * checks protocol parameters and queues an ACCEPT or HUP event
1441  */
1442 static void do_connect_resp(struct gigaset_capi_ctr *iif,
1443                             struct gigaset_capi_appl *ap,
1444                             struct sk_buff *skb)
1445 {
1446         struct cardstate *cs = iif->ctr.driverdata;
1447         _cmsg *cmsg = &iif->acmsg;
1448         struct bc_state *bcs;
1449         struct gigaset_capi_appl *oap;
1450         int channel;
1451
1452         /* decode message */
1453         capi_message2cmsg(cmsg, skb->data);
1454         dump_cmsg(DEBUG_CMD, __func__, cmsg);
1455         dev_kfree_skb_any(skb);
1456
1457         /* extract and check channel number from PLCI */
1458         channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1459         if (!channel || channel > cs->channels) {
1460                 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1461                            "CONNECT_RESP", "PLCI", cmsg->adr.adrPLCI);
1462                 return;
1463         }
1464         bcs = cs->bcs + channel - 1;
1465
1466         switch (cmsg->Reject) {
1467         case 0:         /* Accept */
1468                 /* drop all competing applications, keep only this one */
1469                 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext)
1470                         if (oap != ap)
1471                                 send_disconnect_ind(bcs, oap,
1472                                         CapiCallGivenToOtherApplication);
1473                 ap->bcnext = NULL;
1474                 bcs->ap = ap;
1475                 bcs->rx_bufsize = ap->rp.datablklen;
1476                 dev_kfree_skb(bcs->rx_skb);
1477                 gigaset_new_rx_skb(bcs);
1478                 bcs->chstate |= CHS_NOTIFY_LL;
1479
1480                 /* check/encode B channel protocol */
1481                 if (cmsg->BProtocol == CAPI_DEFAULT) {
1482                         bcs->proto2 = L2_HDLC;
1483                         dev_warn(cs->dev,
1484                 "B2 Protocol X.75 SLP unsupported, using Transparent\n");
1485                 } else {
1486                         switch (cmsg->B1protocol) {
1487                         case 0:
1488                                 bcs->proto2 = L2_HDLC;
1489                                 break;
1490                         case 1:
1491                                 bcs->proto2 = L2_VOICE;
1492                                 break;
1493                         default:
1494                                 dev_warn(cs->dev,
1495                         "B1 Protocol %u unsupported, using Transparent\n",
1496                                          cmsg->B1protocol);
1497                                 bcs->proto2 = L2_VOICE;
1498                         }
1499                         if (cmsg->B2protocol != 1)
1500                                 dev_warn(cs->dev,
1501                         "B2 Protocol %u unsupported, using Transparent\n",
1502                                          cmsg->B2protocol);
1503                         if (cmsg->B3protocol != 0)
1504                                 dev_warn(cs->dev,
1505                         "B3 Protocol %u unsupported, using Transparent\n",
1506                                          cmsg->B3protocol);
1507                         ignore_cstruct_param(cs, cmsg->B1configuration,
1508                                         "CONNECT_RESP", "B1 Configuration");
1509                         ignore_cstruct_param(cs, cmsg->B2configuration,
1510                                         "CONNECT_RESP", "B2 Configuration");
1511                         ignore_cstruct_param(cs, cmsg->B3configuration,
1512                                         "CONNECT_RESP", "B3 Configuration");
1513                 }
1514
1515                 /* ToDo: check/encode remaining parameters */
1516                 ignore_cstruct_param(cs, cmsg->ConnectedNumber,
1517                                         "CONNECT_RESP", "Connected Number");
1518                 ignore_cstruct_param(cs, cmsg->ConnectedSubaddress,
1519                                         "CONNECT_RESP", "Connected Subaddress");
1520                 ignore_cstruct_param(cs, cmsg->LLC,
1521                                         "CONNECT_RESP", "LLC");
1522                 if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1523                         ignore_cstruct_param(cs, cmsg->BChannelinformation,
1524                                         "CONNECT_RESP", "BChannel Information");
1525                         ignore_cstruct_param(cs, cmsg->Keypadfacility,
1526                                         "CONNECT_RESP", "Keypad Facility");
1527                         ignore_cstruct_param(cs, cmsg->Useruserdata,
1528                                         "CONNECT_RESP", "User-User Data");
1529                         ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1530                                         "CONNECT_RESP", "Facility Data Array");
1531                 }
1532
1533                 /* Accept call */
1534                 if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1535                                        EV_ACCEPT, NULL, 0, NULL))
1536                         return;
1537                 gigaset_schedule_event(cs);
1538                 return;
1539
1540         case 1:                 /* Ignore */
1541                 /* send DISCONNECT_IND to this application */
1542                 send_disconnect_ind(bcs, ap, 0);
1543
1544                 /* remove it from the list of listening apps */
1545                 if (bcs->ap == ap) {
1546                         bcs->ap = ap->bcnext;
1547                         if (bcs->ap == NULL)
1548                                 /* last one: stop ev-layer hupD notifications */
1549                                 bcs->chstate &= ~CHS_NOTIFY_LL;
1550                         return;
1551                 }
1552                 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext) {
1553                         if (oap->bcnext == ap) {
1554                                 oap->bcnext = oap->bcnext->bcnext;
1555                                 return;
1556                         }
1557                 }
1558                 dev_err(cs->dev, "%s: application %u not found\n",
1559                         __func__, ap->id);
1560                 return;
1561
1562         default:                /* Reject */
1563                 /* drop all competing applications, keep only this one */
1564                 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext)
1565                         if (oap != ap)
1566                                 send_disconnect_ind(bcs, oap,
1567                                         CapiCallGivenToOtherApplication);
1568                 ap->bcnext = NULL;
1569                 bcs->ap = ap;
1570
1571                 /* reject call - will trigger DISCONNECT_IND for this app */
1572                 dev_info(cs->dev, "%s: Reject=%x\n",
1573                          "CONNECT_RESP", cmsg->Reject);
1574                 if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1575                                        EV_HUP, NULL, 0, NULL))
1576                         return;
1577                 gigaset_schedule_event(cs);
1578                 return;
1579         }
1580 }
1581
1582 /*
1583  * process CONNECT_B3_REQ message
1584  * build NCCI and emit CONNECT_B3_CONF reply
1585  */
1586 static void do_connect_b3_req(struct gigaset_capi_ctr *iif,
1587                               struct gigaset_capi_appl *ap,
1588                               struct sk_buff *skb)
1589 {
1590         struct cardstate *cs = iif->ctr.driverdata;
1591         _cmsg *cmsg = &iif->acmsg;
1592         int channel;
1593
1594         /* decode message */
1595         capi_message2cmsg(cmsg, skb->data);
1596         dump_cmsg(DEBUG_CMD, __func__, cmsg);
1597
1598         /* extract and check channel number from PLCI */
1599         channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1600         if (!channel || channel > cs->channels) {
1601                 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1602                            "CONNECT_B3_REQ", "PLCI", cmsg->adr.adrPLCI);
1603                 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1604                 return;
1605         }
1606
1607         /* mark logical connection active */
1608         ap->connected = APCONN_ACTIVE;
1609
1610         /* build NCCI: always 1 (one B3 connection only) */
1611         cmsg->adr.adrNCCI |= 1 << 16;
1612
1613         /* NCPI parameter: not applicable for B3 Transparent */
1614         ignore_cstruct_param(cs, cmsg->NCPI, "CONNECT_B3_REQ", "NCPI");
1615         send_conf(iif, ap, skb, (cmsg->NCPI && cmsg->NCPI[0]) ?
1616                                 CapiNcpiNotSupportedByProtocol : CapiSuccess);
1617 }
1618
1619 /*
1620  * process CONNECT_B3_RESP message
1621  * Depending on the Reject parameter, either emit CONNECT_B3_ACTIVE_IND
1622  * or queue EV_HUP and emit DISCONNECT_B3_IND.
1623  * The emitted message is always shorter than the received one,
1624  * allowing to reuse the skb.
1625  */
1626 static void do_connect_b3_resp(struct gigaset_capi_ctr *iif,
1627                                struct gigaset_capi_appl *ap,
1628                                struct sk_buff *skb)
1629 {
1630         struct cardstate *cs = iif->ctr.driverdata;
1631         _cmsg *cmsg = &iif->acmsg;
1632         struct bc_state *bcs;
1633         int channel;
1634         unsigned int msgsize;
1635         u8 command;
1636
1637         /* decode message */
1638         capi_message2cmsg(cmsg, skb->data);
1639         dump_cmsg(DEBUG_CMD, __func__, cmsg);
1640
1641         /* extract and check channel number and NCCI */
1642         channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
1643         if (!channel || channel > cs->channels ||
1644             ((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
1645                 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1646                            "CONNECT_B3_RESP", "NCCI", cmsg->adr.adrNCCI);
1647                 dev_kfree_skb_any(skb);
1648                 return;
1649         }
1650         bcs = &cs->bcs[channel-1];
1651
1652         if (cmsg->Reject) {
1653                 /* Reject: clear B3 connect received flag */
1654                 ap->connected = APCONN_SETUP;
1655
1656                 /* trigger hangup, causing eventual DISCONNECT_IND */
1657                 if (!gigaset_add_event(cs, &bcs->at_state,
1658                                        EV_HUP, NULL, 0, NULL)) {
1659                         dev_kfree_skb_any(skb);
1660                         return;
1661                 }
1662                 gigaset_schedule_event(cs);
1663
1664                 /* emit DISCONNECT_B3_IND */
1665                 command = CAPI_DISCONNECT_B3;
1666                 msgsize = CAPI_DISCONNECT_B3_IND_BASELEN;
1667         } else {
1668                 /*
1669                  * Accept: emit CONNECT_B3_ACTIVE_IND immediately, as
1670                  * we only send CONNECT_B3_IND if the B channel is up
1671                  */
1672                 command = CAPI_CONNECT_B3_ACTIVE;
1673                 msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
1674         }
1675         capi_cmsg_header(cmsg, ap->id, command, CAPI_IND,
1676                          ap->nextMessageNumber++, cmsg->adr.adrNCCI);
1677         __skb_trim(skb, msgsize);
1678         capi_cmsg2message(cmsg, skb->data);
1679         dump_cmsg(DEBUG_CMD, __func__, cmsg);
1680         capi_ctr_handle_message(&iif->ctr, ap->id, skb);
1681 }
1682
1683 /*
1684  * process DISCONNECT_REQ message
1685  * schedule EV_HUP and emit DISCONNECT_B3_IND if necessary,
1686  * emit DISCONNECT_CONF reply
1687  */
1688 static void do_disconnect_req(struct gigaset_capi_ctr *iif,
1689                               struct gigaset_capi_appl *ap,
1690                               struct sk_buff *skb)
1691 {
1692         struct cardstate *cs = iif->ctr.driverdata;
1693         _cmsg *cmsg = &iif->acmsg;
1694         struct bc_state *bcs;
1695         _cmsg *b3cmsg;
1696         struct sk_buff *b3skb;
1697         int channel;
1698
1699         /* decode message */
1700         capi_message2cmsg(cmsg, skb->data);
1701         dump_cmsg(DEBUG_CMD, __func__, cmsg);
1702
1703         /* extract and check channel number from PLCI */
1704         channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1705         if (!channel || channel > cs->channels) {
1706                 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1707                            "DISCONNECT_REQ", "PLCI", cmsg->adr.adrPLCI);
1708                 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1709                 return;
1710         }
1711         bcs = cs->bcs + channel - 1;
1712
1713         /* ToDo: process parameter: Additional info */
1714         if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1715                 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1716                                      "DISCONNECT_REQ", "B Channel Information");
1717                 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1718                                      "DISCONNECT_REQ", "Keypad Facility");
1719                 ignore_cstruct_param(cs, cmsg->Useruserdata,
1720                                      "DISCONNECT_REQ", "User-User Data");
1721                 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1722                                      "DISCONNECT_REQ", "Facility Data Array");
1723         }
1724
1725         /* skip if DISCONNECT_IND already sent */
1726         if (!ap->connected)
1727                 return;
1728
1729         /* check for active logical connection */
1730         if (ap->connected >= APCONN_ACTIVE) {
1731                 /*
1732                  * emit DISCONNECT_B3_IND with cause 0x3301
1733                  * use separate cmsg structure, as the content of iif->acmsg
1734                  * is still needed for creating the _CONF message
1735                  */
1736                 b3cmsg = kmalloc(sizeof(*b3cmsg), GFP_KERNEL);
1737                 if (!b3cmsg) {
1738                         dev_err(cs->dev, "%s: out of memory\n", __func__);
1739                         send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1740                         return;
1741                 }
1742                 capi_cmsg_header(b3cmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
1743                                  ap->nextMessageNumber++,
1744                                  cmsg->adr.adrPLCI | (1 << 16));
1745                 b3cmsg->Reason_B3 = CapiProtocolErrorLayer1;
1746                 b3skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_KERNEL);
1747                 if (b3skb == NULL) {
1748                         dev_err(cs->dev, "%s: out of memory\n", __func__);
1749                         send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1750                         return;
1751                 }
1752                 capi_cmsg2message(b3cmsg,
1753                         __skb_put(b3skb, CAPI_DISCONNECT_B3_IND_BASELEN));
1754                 kfree(b3cmsg);
1755                 capi_ctr_handle_message(&iif->ctr, ap->id, b3skb);
1756         }
1757
1758         /* trigger hangup, causing eventual DISCONNECT_IND */
1759         if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) {
1760                 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1761                 return;
1762         }
1763         gigaset_schedule_event(cs);
1764
1765         /* emit reply */
1766         send_conf(iif, ap, skb, CapiSuccess);
1767 }
1768
1769 /*
1770  * process DISCONNECT_B3_REQ message
1771  * schedule EV_HUP and emit DISCONNECT_B3_CONF reply
1772  */
1773 static void do_disconnect_b3_req(struct gigaset_capi_ctr *iif,
1774                                  struct gigaset_capi_appl *ap,
1775                                  struct sk_buff *skb)
1776 {
1777         struct cardstate *cs = iif->ctr.driverdata;
1778         _cmsg *cmsg = &iif->acmsg;
1779         int channel;
1780
1781         /* decode message */
1782         capi_message2cmsg(cmsg, skb->data);
1783         dump_cmsg(DEBUG_CMD, __func__, cmsg);
1784
1785         /* extract and check channel number and NCCI */
1786         channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
1787         if (!channel || channel > cs->channels ||
1788             ((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
1789                 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1790                            "DISCONNECT_B3_REQ", "NCCI", cmsg->adr.adrNCCI);
1791                 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1792                 return;
1793         }
1794
1795         /* reject if logical connection not active */
1796         if (ap->connected < APCONN_ACTIVE) {
1797                 send_conf(iif, ap, skb,
1798                           CapiMessageNotSupportedInCurrentState);
1799                 return;
1800         }
1801
1802         /* trigger hangup, causing eventual DISCONNECT_B3_IND */
1803         if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1804                                EV_HUP, NULL, 0, NULL)) {
1805                 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1806                 return;
1807         }
1808         gigaset_schedule_event(cs);
1809
1810         /* NCPI parameter: not applicable for B3 Transparent */
1811         ignore_cstruct_param(cs, cmsg->NCPI,
1812                                 "DISCONNECT_B3_REQ", "NCPI");
1813         send_conf(iif, ap, skb, (cmsg->NCPI && cmsg->NCPI[0]) ?
1814                                 CapiNcpiNotSupportedByProtocol : CapiSuccess);
1815 }
1816
1817 /*
1818  * process DATA_B3_REQ message
1819  */
1820 static void do_data_b3_req(struct gigaset_capi_ctr *iif,
1821                            struct gigaset_capi_appl *ap,
1822                            struct sk_buff *skb)
1823 {
1824         struct cardstate *cs = iif->ctr.driverdata;
1825         int channel = CAPIMSG_PLCI_PART(skb->data);
1826         u16 ncci = CAPIMSG_NCCI_PART(skb->data);
1827         u16 msglen = CAPIMSG_LEN(skb->data);
1828         u16 datalen = CAPIMSG_DATALEN(skb->data);
1829         u16 flags = CAPIMSG_FLAGS(skb->data);
1830         u16 msgid = CAPIMSG_MSGID(skb->data);
1831         u16 handle = CAPIMSG_HANDLE_REQ(skb->data);
1832
1833         /* frequent message, avoid _cmsg overhead */
1834         dump_rawmsg(DEBUG_LLDATA, "DATA_B3_REQ", skb->data);
1835
1836         gig_dbg(DEBUG_LLDATA,
1837                 "Receiving data from LL (ch: %d, flg: %x, sz: %d|%d)",
1838                 channel, flags, msglen, datalen);
1839
1840         /* check parameters */
1841         if (channel == 0 || channel > cs->channels || ncci != 1) {
1842                 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1843                            "DATA_B3_REQ", "NCCI", CAPIMSG_NCCI(skb->data));
1844                 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1845                 return;
1846         }
1847         if (msglen != CAPI_DATA_B3_REQ_LEN && msglen != CAPI_DATA_B3_REQ_LEN64)
1848                 dev_notice(cs->dev, "%s: unexpected length %d\n",
1849                            "DATA_B3_REQ", msglen);
1850         if (msglen + datalen != skb->len)
1851                 dev_notice(cs->dev, "%s: length mismatch (%d+%d!=%d)\n",
1852                            "DATA_B3_REQ", msglen, datalen, skb->len);
1853         if (msglen + datalen > skb->len) {
1854                 /* message too short for announced data length */
1855                 send_conf(iif, ap, skb, CapiIllMessageParmCoding); /* ? */
1856                 return;
1857         }
1858         if (flags & CAPI_FLAGS_RESERVED) {
1859                 dev_notice(cs->dev, "%s: reserved flags set (%x)\n",
1860                            "DATA_B3_REQ", flags);
1861                 send_conf(iif, ap, skb, CapiIllMessageParmCoding);
1862                 return;
1863         }
1864
1865         /* reject if logical connection not active */
1866         if (ap->connected < APCONN_ACTIVE) {
1867                 send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
1868                 return;
1869         }
1870
1871         /* pull CAPI message into link layer header */
1872         skb_reset_mac_header(skb);
1873         skb->mac_len = msglen;
1874         skb_pull(skb, msglen);
1875
1876         /* pass to device-specific module */
1877         if (cs->ops->send_skb(&cs->bcs[channel-1], skb) < 0) {
1878                 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1879                 return;
1880         }
1881
1882         /*
1883          * DATA_B3_CONF will be sent by gigaset_skb_sent() only if "delivery
1884          * confirmation" bit is set; otherwise we have to send it now
1885          */
1886         if (!(flags & CAPI_FLAGS_DELIVERY_CONFIRMATION))
1887                 send_data_b3_conf(cs, &iif->ctr, ap->id, msgid, channel, handle,
1888                                   flags ? CapiFlagsNotSupportedByProtocol
1889                                         : CAPI_NOERROR);
1890 }
1891
1892 /*
1893  * process RESET_B3_REQ message
1894  * just always reply "not supported by current protocol"
1895  */
1896 static void do_reset_b3_req(struct gigaset_capi_ctr *iif,
1897                             struct gigaset_capi_appl *ap,
1898                             struct sk_buff *skb)
1899 {
1900         /* decode message */
1901         capi_message2cmsg(&iif->acmsg, skb->data);
1902         dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1903         send_conf(iif, ap, skb,
1904                   CapiResetProcedureNotSupportedByCurrentProtocol);
1905 }
1906
1907 /*
1908  * dump unsupported/ignored messages at most twice per minute,
1909  * some apps send those very frequently
1910  */
1911 static unsigned long ignored_msg_dump_time;
1912
1913 /*
1914  * unsupported CAPI message handler
1915  */
1916 static void do_unsupported(struct gigaset_capi_ctr *iif,
1917                            struct gigaset_capi_appl *ap,
1918                            struct sk_buff *skb)
1919 {
1920         /* decode message */
1921         capi_message2cmsg(&iif->acmsg, skb->data);
1922         if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000))
1923                 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1924         send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
1925 }
1926
1927 /*
1928  * CAPI message handler: no-op
1929  */
1930 static void do_nothing(struct gigaset_capi_ctr *iif,
1931                        struct gigaset_capi_appl *ap,
1932                        struct sk_buff *skb)
1933 {
1934         if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000)) {
1935                 /* decode message */
1936                 capi_message2cmsg(&iif->acmsg, skb->data);
1937                 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1938         }
1939         dev_kfree_skb_any(skb);
1940 }
1941
1942 static void do_data_b3_resp(struct gigaset_capi_ctr *iif,
1943                             struct gigaset_capi_appl *ap,
1944                             struct sk_buff *skb)
1945 {
1946         dump_rawmsg(DEBUG_LLDATA, __func__, skb->data);
1947         dev_kfree_skb_any(skb);
1948 }
1949
1950 /* table of outgoing CAPI message handlers with lookup function */
1951 typedef void (*capi_send_handler_t)(struct gigaset_capi_ctr *,
1952                                     struct gigaset_capi_appl *,
1953                                     struct sk_buff *);
1954
1955 static struct {
1956         u16 cmd;
1957         capi_send_handler_t handler;
1958 } capi_send_handler_table[] = {
1959         /* most frequent messages first for faster lookup */
1960         { CAPI_DATA_B3_REQ, do_data_b3_req },
1961         { CAPI_DATA_B3_RESP, do_data_b3_resp },
1962
1963         { CAPI_ALERT_REQ, do_alert_req },
1964         { CAPI_CONNECT_ACTIVE_RESP, do_nothing },
1965         { CAPI_CONNECT_B3_ACTIVE_RESP, do_nothing },
1966         { CAPI_CONNECT_B3_REQ, do_connect_b3_req },
1967         { CAPI_CONNECT_B3_RESP, do_connect_b3_resp },
1968         { CAPI_CONNECT_B3_T90_ACTIVE_RESP, do_nothing },
1969         { CAPI_CONNECT_REQ, do_connect_req },
1970         { CAPI_CONNECT_RESP, do_connect_resp },
1971         { CAPI_DISCONNECT_B3_REQ, do_disconnect_b3_req },
1972         { CAPI_DISCONNECT_B3_RESP, do_nothing },
1973         { CAPI_DISCONNECT_REQ, do_disconnect_req },
1974         { CAPI_DISCONNECT_RESP, do_nothing },
1975         { CAPI_FACILITY_REQ, do_facility_req },
1976         { CAPI_FACILITY_RESP, do_nothing },
1977         { CAPI_LISTEN_REQ, do_listen_req },
1978         { CAPI_SELECT_B_PROTOCOL_REQ, do_unsupported },
1979         { CAPI_RESET_B3_REQ, do_reset_b3_req },
1980         { CAPI_RESET_B3_RESP, do_nothing },
1981
1982         /*
1983          * ToDo: support overlap sending (requires ev-layer state
1984          * machine extension to generate additional ATD commands)
1985          */
1986         { CAPI_INFO_REQ, do_unsupported },
1987         { CAPI_INFO_RESP, do_nothing },
1988
1989         /*
1990          * ToDo: what's the proper response for these?
1991          */
1992         { CAPI_MANUFACTURER_REQ, do_nothing },
1993         { CAPI_MANUFACTURER_RESP, do_nothing },
1994 };
1995
1996 /* look up handler */
1997 static inline capi_send_handler_t lookup_capi_send_handler(const u16 cmd)
1998 {
1999         size_t i;
2000
2001         for (i = 0; i < ARRAY_SIZE(capi_send_handler_table); i++)
2002                 if (capi_send_handler_table[i].cmd == cmd)
2003                         return capi_send_handler_table[i].handler;
2004         return NULL;
2005 }
2006
2007
2008 /**
2009  * gigaset_send_message() - accept a CAPI message from an application
2010  * @ctr:        controller descriptor structure.
2011  * @skb:        CAPI message.
2012  *
2013  * Return value: CAPI error code
2014  * Note: capidrv (and probably others, too) only uses the return value to
2015  * decide whether it has to free the skb (only if result != CAPI_NOERROR (0))
2016  */
2017 static u16 gigaset_send_message(struct capi_ctr *ctr, struct sk_buff *skb)
2018 {
2019         struct gigaset_capi_ctr *iif
2020                 = container_of(ctr, struct gigaset_capi_ctr, ctr);
2021         struct cardstate *cs = ctr->driverdata;
2022         struct gigaset_capi_appl *ap;
2023         capi_send_handler_t handler;
2024
2025         /* can only handle linear sk_buffs */
2026         if (skb_linearize(skb) < 0) {
2027                 dev_warn(cs->dev, "%s: skb_linearize failed\n", __func__);
2028                 return CAPI_MSGOSRESOURCEERR;
2029         }
2030
2031         /* retrieve application data structure */
2032         ap = get_appl(iif, CAPIMSG_APPID(skb->data));
2033         if (!ap) {
2034                 dev_notice(cs->dev, "%s: application %u not registered\n",
2035                            __func__, CAPIMSG_APPID(skb->data));
2036                 return CAPI_ILLAPPNR;
2037         }
2038
2039         /* look up command */
2040         handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
2041         if (!handler) {
2042                 /* unknown/unsupported message type */
2043                 if (printk_ratelimit())
2044                         dev_notice(cs->dev, "%s: unsupported message %u\n",
2045                                    __func__, CAPIMSG_CMD(skb->data));
2046                 return CAPI_ILLCMDORSUBCMDORMSGTOSMALL;
2047         }
2048
2049         /* serialize */
2050         if (atomic_add_return(1, &iif->sendqlen) > 1) {
2051                 /* queue behind other messages */
2052                 skb_queue_tail(&iif->sendqueue, skb);
2053                 return CAPI_NOERROR;
2054         }
2055
2056         /* process message */
2057         handler(iif, ap, skb);
2058
2059         /* process other messages arrived in the meantime */
2060         while (atomic_sub_return(1, &iif->sendqlen) > 0) {
2061                 skb = skb_dequeue(&iif->sendqueue);
2062                 if (!skb) {
2063                         /* should never happen */
2064                         dev_err(cs->dev, "%s: send queue empty\n", __func__);
2065                         continue;
2066                 }
2067                 ap = get_appl(iif, CAPIMSG_APPID(skb->data));
2068                 if (!ap) {
2069                         /* could that happen? */
2070                         dev_warn(cs->dev, "%s: application %u vanished\n",
2071                                  __func__, CAPIMSG_APPID(skb->data));
2072                         continue;
2073                 }
2074                 handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
2075                 if (!handler) {
2076                         /* should never happen */
2077                         dev_err(cs->dev, "%s: handler %x vanished\n",
2078                                 __func__, CAPIMSG_CMD(skb->data));
2079                         continue;
2080                 }
2081                 handler(iif, ap, skb);
2082         }
2083
2084         return CAPI_NOERROR;
2085 }
2086
2087 /**
2088  * gigaset_procinfo() - build single line description for controller
2089  * @ctr:        controller descriptor structure.
2090  *
2091  * Return value: pointer to generated string (null terminated)
2092  */
2093 static char *gigaset_procinfo(struct capi_ctr *ctr)
2094 {
2095         return ctr->name;       /* ToDo: more? */
2096 }
2097
2098 static int gigaset_proc_show(struct seq_file *m, void *v)
2099 {
2100         struct capi_ctr *ctr = m->private;
2101         struct cardstate *cs = ctr->driverdata;
2102         char *s;
2103         int i;
2104
2105         seq_printf(m, "%-16s %s\n", "name", ctr->name);
2106         seq_printf(m, "%-16s %s %s\n", "dev",
2107                         dev_driver_string(cs->dev), dev_name(cs->dev));
2108         seq_printf(m, "%-16s %d\n", "id", cs->myid);
2109         if (cs->gotfwver)
2110                 seq_printf(m, "%-16s %d.%d.%d.%d\n", "firmware",
2111                         cs->fwver[0], cs->fwver[1], cs->fwver[2], cs->fwver[3]);
2112         seq_printf(m, "%-16s %d\n", "channels", cs->channels);
2113         seq_printf(m, "%-16s %s\n", "onechannel", cs->onechannel ? "yes" : "no");
2114
2115         switch (cs->mode) {
2116         case M_UNKNOWN:
2117                 s = "unknown";
2118                 break;
2119         case M_CONFIG:
2120                 s = "config";
2121                 break;
2122         case M_UNIMODEM:
2123                 s = "Unimodem";
2124                 break;
2125         case M_CID:
2126                 s = "CID";
2127                 break;
2128         default:
2129                 s = "??";
2130         }
2131         seq_printf(m, "%-16s %s\n", "mode", s);
2132
2133         switch (cs->mstate) {
2134         case MS_UNINITIALIZED:
2135                 s = "uninitialized";
2136                 break;
2137         case MS_INIT:
2138                 s = "init";
2139                 break;
2140         case MS_LOCKED:
2141                 s = "locked";
2142                 break;
2143         case MS_SHUTDOWN:
2144                 s = "shutdown";
2145                 break;
2146         case MS_RECOVER:
2147                 s = "recover";
2148                 break;
2149         case MS_READY:
2150                 s = "ready";
2151                 break;
2152         default:
2153                 s = "??";
2154         }
2155         seq_printf(m, "%-16s %s\n", "mstate", s);
2156
2157         seq_printf(m, "%-16s %s\n", "running", cs->running ? "yes" : "no");
2158         seq_printf(m, "%-16s %s\n", "connected", cs->connected ? "yes" : "no");
2159         seq_printf(m, "%-16s %s\n", "isdn_up", cs->isdn_up ? "yes" : "no");
2160         seq_printf(m, "%-16s %s\n", "cidmode", cs->cidmode ? "yes" : "no");
2161
2162         for (i = 0; i < cs->channels; i++) {
2163                 seq_printf(m, "[%d]%-13s %d\n", i, "corrupted",
2164                                 cs->bcs[i].corrupted);
2165                 seq_printf(m, "[%d]%-13s %d\n", i, "trans_down",
2166                                 cs->bcs[i].trans_down);
2167                 seq_printf(m, "[%d]%-13s %d\n", i, "trans_up",
2168                                 cs->bcs[i].trans_up);
2169                 seq_printf(m, "[%d]%-13s %d\n", i, "chstate",
2170                                 cs->bcs[i].chstate);
2171                 switch (cs->bcs[i].proto2) {
2172                 case L2_BITSYNC:
2173                         s = "bitsync";
2174                         break;
2175                 case L2_HDLC:
2176                         s = "HDLC";
2177                         break;
2178                 case L2_VOICE:
2179                         s = "voice";
2180                         break;
2181                 default:
2182                         s = "??";
2183                 }
2184                 seq_printf(m, "[%d]%-13s %s\n", i, "proto2", s);
2185         }
2186         return 0;
2187 }
2188
2189 static int gigaset_proc_open(struct inode *inode, struct file *file)
2190 {
2191         return single_open(file, gigaset_proc_show, PDE(inode)->data);
2192 }
2193
2194 static const struct file_operations gigaset_proc_fops = {
2195         .owner          = THIS_MODULE,
2196         .open           = gigaset_proc_open,
2197         .read           = seq_read,
2198         .llseek         = seq_lseek,
2199         .release        = single_release,
2200 };
2201
2202 /**
2203  * gigaset_isdn_regdev() - register device to LL
2204  * @cs:         device descriptor structure.
2205  * @isdnid:     device name.
2206  *
2207  * Return value: 1 for success, 0 for failure
2208  */
2209 int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid)
2210 {
2211         struct gigaset_capi_ctr *iif;
2212         int rc;
2213
2214         iif = kmalloc(sizeof(*iif), GFP_KERNEL);
2215         if (!iif) {
2216                 pr_err("%s: out of memory\n", __func__);
2217                 return 0;
2218         }
2219
2220         /* prepare controller structure */
2221         iif->ctr.owner         = THIS_MODULE;
2222         iif->ctr.driverdata    = cs;
2223         strncpy(iif->ctr.name, isdnid, sizeof(iif->ctr.name));
2224         iif->ctr.driver_name   = "gigaset";
2225         iif->ctr.load_firmware = NULL;
2226         iif->ctr.reset_ctr     = NULL;
2227         iif->ctr.register_appl = gigaset_register_appl;
2228         iif->ctr.release_appl  = gigaset_release_appl;
2229         iif->ctr.send_message  = gigaset_send_message;
2230         iif->ctr.procinfo      = gigaset_procinfo;
2231         iif->ctr.proc_fops = &gigaset_proc_fops;
2232         INIT_LIST_HEAD(&iif->appls);
2233         skb_queue_head_init(&iif->sendqueue);
2234         atomic_set(&iif->sendqlen, 0);
2235
2236         /* register controller with CAPI */
2237         rc = attach_capi_ctr(&iif->ctr);
2238         if (rc) {
2239                 pr_err("attach_capi_ctr failed (%d)\n", rc);
2240                 kfree(iif);
2241                 return 0;
2242         }
2243
2244         cs->iif = iif;
2245         cs->hw_hdr_len = CAPI_DATA_B3_REQ_LEN;
2246         return 1;
2247 }
2248
2249 /**
2250  * gigaset_isdn_unregdev() - unregister device from LL
2251  * @cs:         device descriptor structure.
2252  */
2253 void gigaset_isdn_unregdev(struct cardstate *cs)
2254 {
2255         struct gigaset_capi_ctr *iif = cs->iif;
2256
2257         detach_capi_ctr(&iif->ctr);
2258         kfree(iif);
2259         cs->iif = NULL;
2260 }
2261
2262 static struct capi_driver capi_driver_gigaset = {
2263         .name           = "gigaset",
2264         .revision       = "1.0",
2265 };
2266
2267 /**
2268  * gigaset_isdn_regdrv() - register driver to LL
2269  */
2270 void gigaset_isdn_regdrv(void)
2271 {
2272         pr_info("Kernel CAPI interface\n");
2273         register_capi_driver(&capi_driver_gigaset);
2274 }
2275
2276 /**
2277  * gigaset_isdn_unregdrv() - unregister driver from LL
2278  */
2279 void gigaset_isdn_unregdrv(void)
2280 {
2281         unregister_capi_driver(&capi_driver_gigaset);
2282 }