drivers/isdn/gigaset/ev-layer.c

   1 /*
   2  * Stuff used by all variants of the driver
   3  *
   4  * Copyright (c) 2001 by Stefan Eilers,
   5  *                       Hansjoerg Lipp <hjlipp@web.de>,
   6  *                       Tilman Schmidt <tilman@imap.cc>.
   7  *
   8  * =====================================================================
   9  *      This program is free software; you can redistribute it and/or
  10  *      modify it under the terms of the GNU General Public License as
  11  *      published by the Free Software Foundation; either version 2 of
  12  *      the License, or (at your option) any later version.
  13  * =====================================================================
  14  */
  15
  16 #include "gigaset.h"
  17
  18 /* ========================================================== */
  19 /* bit masks for pending commands */
  20 #define PC_DIAL         0x001
  21 #define PC_HUP          0x002
  22 #define PC_INIT         0x004
  23 #define PC_DLE0         0x008
  24 #define PC_DLE1         0x010
  25 #define PC_SHUTDOWN     0x020
  26 #define PC_ACCEPT       0x040
  27 #define PC_CID          0x080
  28 #define PC_NOCID        0x100
  29 #define PC_CIDMODE      0x200
  30 #define PC_UMMODE       0x400
  31
  32 /* types of modem responses */
  33 #define RT_NOTHING      0
  34 #define RT_ZSAU         1
  35 #define RT_RING         2
  36 #define RT_NUMBER       3
  37 #define RT_STRING       4
  38 #define RT_HEX          5
  39 #define RT_ZCAU         6
  40
  41 /* Possible ASCII responses */
  42 #define RSP_OK          0
  43 //#define RSP_BUSY      1
  44 //#define RSP_CONNECT   2
  45 #define RSP_ZGCI        3
  46 #define RSP_RING        4
  47 #define RSP_ZAOC        5
  48 #define RSP_ZCSTR       6
  49 #define RSP_ZCFGT       7
  50 #define RSP_ZCFG        8
  51 #define RSP_ZCCR        9
  52 #define RSP_EMPTY       10
  53 #define RSP_ZLOG        11
  54 #define RSP_ZCAU        12
  55 #define RSP_ZMWI        13
  56 #define RSP_ZABINFO     14
  57 #define RSP_ZSMLSTCHG   15
  58 #define RSP_VAR         100
  59 #define RSP_ZSAU        (RSP_VAR + VAR_ZSAU)
  60 #define RSP_ZDLE        (RSP_VAR + VAR_ZDLE)
  61 #define RSP_ZVLS        (RSP_VAR + VAR_ZVLS)
  62 #define RSP_ZCTP        (RSP_VAR + VAR_ZCTP)
  63 #define RSP_STR         (RSP_VAR + VAR_NUM)
  64 #define RSP_NMBR        (RSP_STR + STR_NMBR)
  65 #define RSP_ZCPN        (RSP_STR + STR_ZCPN)
  66 #define RSP_ZCON        (RSP_STR + STR_ZCON)
  67 #define RSP_ZBC         (RSP_STR + STR_ZBC)
  68 #define RSP_ZHLC        (RSP_STR + STR_ZHLC)
  69 #define RSP_ERROR       -1      /* ERROR              */
  70 #define RSP_WRONG_CID   -2      /* unknown cid in cmd */
  71 //#define RSP_EMPTY     -3
  72 #define RSP_UNKNOWN     -4      /* unknown response   */
  73 #define RSP_FAIL        -5      /* internal error     */
  74 #define RSP_INVAL       -6      /* invalid response   */
  75
  76 #define RSP_NONE        -19
  77 #define RSP_STRING      -20
  78 #define RSP_NULL        -21
  79 //#define RSP_RETRYFAIL -22
  80 //#define RSP_RETRY     -23
  81 //#define RSP_SKIP      -24
  82 #define RSP_INIT        -27
  83 #define RSP_ANY         -26
  84 #define RSP_LAST        -28
  85 #define RSP_NODEV       -9
  86
  87 /* actions for process_response */
  88 #define ACT_NOTHING             0
  89 #define ACT_SETDLE1             1
  90 #define ACT_SETDLE0             2
  91 #define ACT_FAILINIT            3
  92 #define ACT_HUPMODEM            4
  93 #define ACT_CONFIGMODE          5
  94 #define ACT_INIT                6
  95 #define ACT_DLE0                7
  96 #define ACT_DLE1                8
  97 #define ACT_FAILDLE0            9
  98 #define ACT_FAILDLE1            10
  99 #define ACT_RING                11
 100 #define ACT_CID                 12
 101 #define ACT_FAILCID             13
 102 #define ACT_SDOWN               14
 103 #define ACT_FAILSDOWN           15
 104 #define ACT_DEBUG               16
 105 #define ACT_WARN                17
 106 #define ACT_DIALING             18
 107 #define ACT_ABORTDIAL           19
 108 #define ACT_DISCONNECT          20
 109 #define ACT_CONNECT             21
 110 #define ACT_REMOTEREJECT        22
 111 #define ACT_CONNTIMEOUT         23
 112 #define ACT_REMOTEHUP           24
 113 #define ACT_ABORTHUP            25
 114 #define ACT_ICALL               26
 115 #define ACT_ACCEPTED            27
 116 #define ACT_ABORTACCEPT         28
 117 #define ACT_TIMEOUT             29
 118 #define ACT_GETSTRING           30
 119 #define ACT_SETVER              31
 120 #define ACT_FAILVER             32
 121 #define ACT_GOTVER              33
 122 #define ACT_TEST                34
 123 #define ACT_ERROR               35
 124 #define ACT_ABORTCID            36
 125 #define ACT_ZCAU                37
 126 #define ACT_NOTIFY_BC_DOWN      38
 127 #define ACT_NOTIFY_BC_UP        39
 128 #define ACT_DIAL                40
 129 #define ACT_ACCEPT              41
 130 #define ACT_PROTO_L2            42
 131 #define ACT_HUP                 43
 132 #define ACT_IF_LOCK             44
 133 #define ACT_START               45
 134 #define ACT_STOP                46
 135 #define ACT_FAKEDLE0            47
 136 #define ACT_FAKEHUP             48
 137 #define ACT_FAKESDOWN           49
 138 #define ACT_SHUTDOWN            50
 139 #define ACT_PROC_CIDMODE        51
 140 #define ACT_UMODESET            52
 141 #define ACT_FAILUMODE           53
 142 #define ACT_CMODESET            54
 143 #define ACT_FAILCMODE           55
 144 #define ACT_IF_VER              56
 145 #define ACT_CMD                 100
 146
 147 /* at command sequences */
 148 #define SEQ_NONE        0
 149 #define SEQ_INIT        100
 150 #define SEQ_DLE0        200
 151 #define SEQ_DLE1        250
 152 #define SEQ_CID         300
 153 #define SEQ_NOCID       350
 154 #define SEQ_HUP         400
 155 #define SEQ_DIAL        600
 156 #define SEQ_ACCEPT      720
 157 #define SEQ_SHUTDOWN    500
 158 #define SEQ_CIDMODE     10
 159 #define SEQ_UMMODE      11
 160
 161
 162 // 100: init, 200: dle0, 250:dle1, 300: get cid (dial), 350: "hup" (no cid), 400: hup, 500: reset, 600: dial, 700: ring
 163 struct reply_t gigaset_tab_nocid[] =
 164 {
 165         /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout, action, command */
 166
 167         /* initialize device, set cid mode if possible */
 168         //{RSP_INIT,     -1, -1,100,                900, 0, {ACT_TEST}},
 169         //{RSP_ERROR,   900,900, -1,                  0, 0, {ACT_FAILINIT}},
 170         //{RSP_OK,      900,900, -1,                100, INIT_TIMEOUT,
 171         //                                                  {ACT_TIMEOUT}},
 172
 173         {RSP_INIT,     -1, -1,SEQ_INIT,           100, INIT_TIMEOUT,
 174                                                           {ACT_TIMEOUT}},                /* wait until device is ready */
 175
 176         {EV_TIMEOUT,  100,100, -1,                101, 3, {0},             "Z\r"},       /* device in transparent mode? try to initialize it. */
 177         {RSP_OK,      101,103, -1,                120, 5, {ACT_GETSTRING}, "+GMR\r"},    /* get version */
 178
 179         {EV_TIMEOUT,  101,101, -1,                102, 5, {0},             "Z\r"},       /* timeout => try once again. */
 180         {RSP_ERROR,   101,101, -1,                102, 5, {0},             "Z\r"},       /* error => try once again. */
 181
 182         {EV_TIMEOUT,  102,102, -1,                108, 5, {ACT_SETDLE1},   "^SDLE=0\r"}, /* timeout => try again in DLE mode. */
 183         {RSP_OK,      108,108, -1,                104,-1},
 184         {RSP_ZDLE,    104,104,  0,                103, 5, {0},             "Z\r"},
 185         {EV_TIMEOUT,  104,104, -1,                  0, 0, {ACT_FAILINIT}},
 186         {RSP_ERROR,   108,108, -1,                  0, 0, {ACT_FAILINIT}},
 187
 188         {EV_TIMEOUT,  108,108, -1,                105, 2, {ACT_SETDLE0,
 189                                                            ACT_HUPMODEM,
 190                                                            ACT_TIMEOUT}},                /* still timeout => connection in unimodem mode? */
 191         {EV_TIMEOUT,  105,105, -1,                103, 5, {0},             "Z\r"},
 192
 193         {RSP_ERROR,   102,102, -1,                107, 5, {0},             "^GETPRE\r"}, /* ERROR on ATZ => maybe in config mode? */
 194         {RSP_OK,      107,107, -1,                  0, 0, {ACT_CONFIGMODE}},
 195         {RSP_ERROR,   107,107, -1,                  0, 0, {ACT_FAILINIT}},
 196         {EV_TIMEOUT,  107,107, -1,                  0, 0, {ACT_FAILINIT}},
 197
 198         {RSP_ERROR,   103,103, -1,                  0, 0, {ACT_FAILINIT}},
 199         {EV_TIMEOUT,  103,103, -1,                  0, 0, {ACT_FAILINIT}},
 200
 201         {RSP_STRING,  120,120, -1,                121,-1, {ACT_SETVER}},
 202
 203         {EV_TIMEOUT,  120,121, -1,                  0, 0, {ACT_FAILVER, ACT_INIT}},
 204         {RSP_ERROR,   120,121, -1,                  0, 0, {ACT_FAILVER, ACT_INIT}},
 205         {RSP_OK,      121,121, -1,                  0, 0, {ACT_GOTVER,  ACT_INIT}},
 206
 207         /* leave dle mode */
 208         {RSP_INIT,      0,  0,SEQ_DLE0,           201, 5, {0},             "^SDLE=0\r"},
 209         {RSP_OK,      201,201, -1,                202,-1},
 210         //{RSP_ZDLE,    202,202,  0,                202, 0, {ACT_ERROR}},//DELETE
 211         {RSP_ZDLE,    202,202,  0,                  0, 0, {ACT_DLE0}},
 212         {RSP_NODEV,   200,249, -1,                  0, 0, {ACT_FAKEDLE0}},
 213         {RSP_ERROR,   200,249, -1,                  0, 0, {ACT_FAILDLE0}},
 214         {EV_TIMEOUT,  200,249, -1,                  0, 0, {ACT_FAILDLE0}},
 215
 216         /* enter dle mode */
 217         {RSP_INIT,      0,  0,SEQ_DLE1,           251, 5, {0},             "^SDLE=1\r"},
 218         {RSP_OK,      251,251, -1,                252,-1},
 219         {RSP_ZDLE,    252,252,  1,                  0, 0, {ACT_DLE1}},
 220         {RSP_ERROR,   250,299, -1,                  0, 0, {ACT_FAILDLE1}},
 221         {EV_TIMEOUT,  250,299, -1,                  0, 0, {ACT_FAILDLE1}},
 222
 223         /* incoming call */
 224         {RSP_RING,     -1, -1, -1,                 -1,-1, {ACT_RING}},
 225
 226         /* get cid */
 227         //{RSP_INIT,      0,  0,300,                901, 0, {ACT_TEST}},
 228         //{RSP_ERROR,   901,901, -1,                  0, 0, {ACT_FAILCID}},
 229         //{RSP_OK,      901,901, -1,                301, 5, {0},             "^SGCI?\r"},
 230
 231         {RSP_INIT,      0,  0,SEQ_CID,            301, 5, {0},             "^SGCI?\r"},
 232         {RSP_OK,      301,301, -1,                302,-1},
 233         {RSP_ZGCI,    302,302, -1,                  0, 0, {ACT_CID}},
 234         {RSP_ERROR,   301,349, -1,                  0, 0, {ACT_FAILCID}},
 235         {EV_TIMEOUT,  301,349, -1,                  0, 0, {ACT_FAILCID}},
 236
 237         /* enter cid mode */
 238         {RSP_INIT,      0,  0,SEQ_CIDMODE,        150, 5, {0},             "^SGCI=1\r"},
 239         {RSP_OK,      150,150, -1,                  0, 0, {ACT_CMODESET}},
 240         {RSP_ERROR,   150,150, -1,                  0, 0, {ACT_FAILCMODE}},
 241         {EV_TIMEOUT,  150,150, -1,                  0, 0, {ACT_FAILCMODE}},
 242
 243         /* leave cid mode */
 244         //{RSP_INIT,      0,  0,SEQ_UMMODE,         160, 5, {0},             "^SGCI=0\r"},
 245         {RSP_INIT,      0,  0,SEQ_UMMODE,         160, 5, {0},             "Z\r"},
 246         {RSP_OK,      160,160, -1,                  0, 0, {ACT_UMODESET}},
 247         {RSP_ERROR,   160,160, -1,                  0, 0, {ACT_FAILUMODE}},
 248         {EV_TIMEOUT,  160,160, -1,                  0, 0, {ACT_FAILUMODE}},
 249
 250         /* abort getting cid */
 251         {RSP_INIT,      0,  0,SEQ_NOCID,            0, 0, {ACT_ABORTCID}},
 252
 253         /* reset */
 254         {RSP_INIT,      0,  0,SEQ_SHUTDOWN,       504, 5, {0},             "Z\r"},
 255         {RSP_OK,      504,504, -1,                  0, 0, {ACT_SDOWN}},
 256         {RSP_ERROR,   501,599, -1,                  0, 0, {ACT_FAILSDOWN}},
 257         {EV_TIMEOUT,  501,599, -1,                  0, 0, {ACT_FAILSDOWN}},
 258         {RSP_NODEV,   501,599, -1,                  0, 0, {ACT_FAKESDOWN}},
 259
 260         {EV_PROC_CIDMODE,-1, -1, -1,               -1,-1, {ACT_PROC_CIDMODE}}, //FIXME
 261         {EV_IF_LOCK,   -1, -1, -1,                 -1,-1, {ACT_IF_LOCK}}, //FIXME
 262         {EV_IF_VER,    -1, -1, -1,                 -1,-1, {ACT_IF_VER}}, //FIXME
 263         {EV_START,     -1, -1, -1,                 -1,-1, {ACT_START}}, //FIXME
 264         {EV_STOP,      -1, -1, -1,                 -1,-1, {ACT_STOP}}, //FIXME
 265         {EV_SHUTDOWN,  -1, -1, -1,                 -1,-1, {ACT_SHUTDOWN}}, //FIXME
 266
 267         /* misc. */
 268         {RSP_EMPTY,    -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 269         {RSP_ZCFGT,    -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 270         {RSP_ZCFG,     -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 271         {RSP_ZLOG,     -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 272         {RSP_ZMWI,     -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 273         {RSP_ZABINFO,  -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 274         {RSP_ZSMLSTCHG,-1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 275
 276         {RSP_ZCAU,     -1, -1, -1,                 -1,-1, {ACT_ZCAU}},
 277         {RSP_NONE,     -1, -1, -1,                 -1,-1, {ACT_DEBUG}},
 278         {RSP_ANY,      -1, -1, -1,                 -1,-1, {ACT_WARN}},
 279         {RSP_LAST}
 280 };
 281
 282 // 600: start dialing, 650: dial in progress, 800: connection is up, 700: ring, 400: hup, 750: accepted icall
 283 struct reply_t gigaset_tab_cid[] =
 284 {
 285         /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout, action, command */
 286
 287         /* dial */
 288         {EV_DIAL,      -1, -1, -1,                 -1,-1, {ACT_DIAL}}, //FIXME
 289         {RSP_INIT,      0,  0,SEQ_DIAL,           601, 5, {ACT_CMD+AT_BC}},
 290         {RSP_OK,      601,601, -1,                602, 5, {ACT_CMD+AT_HLC}},
 291         {RSP_NULL,    602,602, -1,                603, 5, {ACT_CMD+AT_PROTO}},
 292         {RSP_OK,      602,602, -1,                603, 5, {ACT_CMD+AT_PROTO}},
 293         {RSP_OK,      603,603, -1,                604, 5, {ACT_CMD+AT_TYPE}},
 294         {RSP_OK,      604,604, -1,                605, 5, {ACT_CMD+AT_MSN}},
 295         {RSP_OK,      605,605, -1,                606, 5, {ACT_CMD+AT_ISO}},
 296         {RSP_NULL,    605,605, -1,                606, 5, {ACT_CMD+AT_ISO}},
 297         {RSP_OK,      606,606, -1,                607, 5, {0}, "+VLS=17\r"},
 298         {RSP_OK,      607,607, -1,                608,-1},
 299         {RSP_ZSAU,    608,608,ZSAU_PROCEEDING,    609, 5, {ACT_CMD+AT_DIAL}},
 300         {RSP_OK,      609,609, -1,                650, 0, {ACT_DIALING}},
 301
 302         {RSP_ERROR,   601,609, -1,                  0, 0, {ACT_ABORTDIAL}},
 303         {EV_TIMEOUT,  601,609, -1,                  0, 0, {ACT_ABORTDIAL}},
 304
 305         /* optional dialing responses */
 306         {EV_BC_OPEN,  650,650, -1,                651,-1},
 307         {RSP_ZVLS,    608,651, 17,                 -1,-1, {ACT_DEBUG}},
 308         {RSP_ZCTP,    609,651, -1,                 -1,-1, {ACT_DEBUG}},
 309         {RSP_ZCPN,    609,651, -1,                 -1,-1, {ACT_DEBUG}},
 310         {RSP_ZSAU,    650,651,ZSAU_CALL_DELIVERED, -1,-1, {ACT_DEBUG}},
 311
 312         /* connect */
 313         {RSP_ZSAU,    650,650,ZSAU_ACTIVE,        800,-1, {ACT_CONNECT}},
 314         {RSP_ZSAU,    651,651,ZSAU_ACTIVE,        800,-1, {ACT_CONNECT,
 315                                                            ACT_NOTIFY_BC_UP}},
 316         {RSP_ZSAU,    750,750,ZSAU_ACTIVE,        800,-1, {ACT_CONNECT}},
 317         {RSP_ZSAU,    751,751,ZSAU_ACTIVE,        800,-1, {ACT_CONNECT,
 318                                                            ACT_NOTIFY_BC_UP}},
 319         {EV_BC_OPEN,  800,800, -1,                800,-1, {ACT_NOTIFY_BC_UP}},
 320
 321         /* remote hangup */
 322         {RSP_ZSAU,    650,651,ZSAU_DISCONNECT_IND,  0, 0, {ACT_REMOTEREJECT}},
 323         {RSP_ZSAU,    750,751,ZSAU_DISCONNECT_IND,  0, 0, {ACT_REMOTEHUP}},
 324         {RSP_ZSAU,    800,800,ZSAU_DISCONNECT_IND,  0, 0, {ACT_REMOTEHUP}},
 325
 326         /* hangup */
 327         {EV_HUP,       -1, -1, -1,                 -1,-1, {ACT_HUP}}, //FIXME
 328         {RSP_INIT,     -1, -1,SEQ_HUP,            401, 5, {0},             "+VLS=0\r"}, /* hang up */ //-1,-1?
 329         {RSP_OK,      401,401, -1,                402, 5},
 330         {RSP_ZVLS,    402,402,  0,                403, 5},
 331         {RSP_ZSAU,    403,403,ZSAU_DISCONNECT_REQ, -1,-1, {ACT_DEBUG}}, /* if not remote hup */
 332         //{RSP_ZSAU,    403,403,ZSAU_NULL,          401, 0, {ACT_ERROR}}, //DELETE//FIXME -> DLE0 // should we do this _before_ hanging up for base driver?
 333         {RSP_ZSAU,    403,403,ZSAU_NULL,            0, 0, {ACT_DISCONNECT}}, //FIXME -> DLE0 // should we do this _before_ hanging up for base driver?
 334         {RSP_NODEV,   401,403, -1,                  0, 0, {ACT_FAKEHUP}}, //FIXME -> DLE0 // should we do this _before_ hanging up for base driver?
 335         {RSP_ERROR,   401,401, -1,                  0, 0, {ACT_ABORTHUP}},
 336         {EV_TIMEOUT,  401,403, -1,                  0, 0, {ACT_ABORTHUP}},
 337
 338         {EV_BC_CLOSED,  0,  0, -1,                  0,-1, {ACT_NOTIFY_BC_DOWN}}, //FIXME new constate + timeout
 339
 340         /* ring */
 341         {RSP_ZBC,     700,700, -1,                 -1,-1, {0}},
 342         {RSP_ZHLC,    700,700, -1,                 -1,-1, {0}},
 343         {RSP_NMBR,    700,700, -1,                 -1,-1, {0}},
 344         {RSP_ZCPN,    700,700, -1,                 -1,-1, {0}},
 345         {RSP_ZCTP,    700,700, -1,                 -1,-1, {0}},
 346         {EV_TIMEOUT,  700,700, -1,               720,720, {ACT_ICALL}},
 347         {EV_BC_CLOSED,720,720, -1,                  0,-1, {ACT_NOTIFY_BC_DOWN}},
 348
 349         /*accept icall*/
 350         {EV_ACCEPT,    -1, -1, -1,                 -1,-1, {ACT_ACCEPT}}, //FIXME
 351         {RSP_INIT,    720,720,SEQ_ACCEPT,         721, 5, {ACT_CMD+AT_PROTO}},
 352         {RSP_OK,      721,721, -1,                722, 5, {ACT_CMD+AT_ISO}},
 353         {RSP_OK,      722,722, -1,                723, 5, {0},             "+VLS=17\r"}, /* set "Endgeraetemodus" */
 354         {RSP_OK,      723,723, -1,                724, 5, {0}},
 355         {RSP_ZVLS,    724,724, 17,                750,50, {ACT_ACCEPTED}},
 356         {RSP_ERROR,   721,729, -1,                  0, 0, {ACT_ABORTACCEPT}},
 357         {EV_TIMEOUT,  721,729, -1,                  0, 0, {ACT_ABORTACCEPT}},
 358         {RSP_ZSAU,    700,729,ZSAU_NULL,            0, 0, {ACT_ABORTACCEPT}},
 359         {RSP_ZSAU,    700,729,ZSAU_ACTIVE,          0, 0, {ACT_ABORTACCEPT}},
 360         {RSP_ZSAU,    700,729,ZSAU_DISCONNECT_IND,  0, 0, {ACT_ABORTACCEPT}},
 361
 362         {EV_BC_OPEN,  750,750, -1,                751,-1},
 363         {EV_TIMEOUT,  750,751, -1,                  0, 0, {ACT_CONNTIMEOUT}},
 364
 365         /* B channel closed (general case) */
 366         {EV_BC_CLOSED, -1, -1, -1,                 -1,-1, {ACT_NOTIFY_BC_DOWN}}, //FIXME
 367
 368         /* misc. */
 369         {EV_PROTO_L2,  -1, -1, -1,                 -1,-1, {ACT_PROTO_L2}}, //FIXME
 370
 371         {RSP_ZCON,     -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 372         {RSP_ZCCR,     -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 373         {RSP_ZAOC,     -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 374         {RSP_ZCSTR,    -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 375
 376         {RSP_ZCAU,     -1, -1, -1,                 -1,-1, {ACT_ZCAU}},
 377         {RSP_NONE,     -1, -1, -1,                 -1,-1, {ACT_DEBUG}},
 378         {RSP_ANY,      -1, -1, -1,                 -1,-1, {ACT_WARN}},
 379         {RSP_LAST}
 380 };
 381
 382
 383 static const struct resp_type_t resp_type[] =
 384 {
 385         /*{"",          RSP_EMPTY,      RT_NOTHING},*/
 386         {"OK",          RSP_OK,         RT_NOTHING},
 387         {"ERROR",       RSP_ERROR,      RT_NOTHING},
 388         {"ZSAU",        RSP_ZSAU,       RT_ZSAU},
 389         {"ZCAU",        RSP_ZCAU,       RT_ZCAU},
 390         {"RING",        RSP_RING,       RT_RING},
 391         {"ZGCI",        RSP_ZGCI,       RT_NUMBER},
 392         {"ZVLS",        RSP_ZVLS,       RT_NUMBER},
 393         {"ZCTP",        RSP_ZCTP,       RT_NUMBER},
 394         {"ZDLE",        RSP_ZDLE,       RT_NUMBER},
 395         {"ZCFGT",       RSP_ZCFGT,      RT_NUMBER},
 396         {"ZCCR",        RSP_ZCCR,       RT_NUMBER},
 397         {"ZMWI",        RSP_ZMWI,       RT_NUMBER},
 398         {"ZHLC",        RSP_ZHLC,       RT_STRING},
 399         {"ZBC",         RSP_ZBC,        RT_STRING},
 400         {"NMBR",        RSP_NMBR,       RT_STRING},
 401         {"ZCPN",        RSP_ZCPN,       RT_STRING},
 402         {"ZCON",        RSP_ZCON,       RT_STRING},
 403         {"ZAOC",        RSP_ZAOC,       RT_STRING},
 404         {"ZCSTR",       RSP_ZCSTR,      RT_STRING},
 405         {"ZCFG",        RSP_ZCFG,       RT_HEX},
 406         {"ZLOG",        RSP_ZLOG,       RT_NOTHING},
 407         {"ZABINFO",     RSP_ZABINFO,    RT_NOTHING},
 408         {"ZSMLSTCHG",   RSP_ZSMLSTCHG,  RT_NOTHING},
 409         {NULL,0,0}
 410 };
 411
 412 /*
 413  * Get integer from char-pointer
 414  */
 415 static int isdn_getnum(char *p)
 416 {
 417         int v = -1;
 418
 419         gig_dbg(DEBUG_TRANSCMD, "string: %s", p);
 420
 421         while (*p >= '0' && *p <= '9')
 422                 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p++) - '0');
 423         if (*p)
 424                 v = -1; /* invalid Character */
 425         return v;
 426 }
 427
 428 /*
 429  * Get integer from char-pointer
 430  */
 431 static int isdn_gethex(char *p)
 432 {
 433         int v = 0;
 434         int c;
 435
 436         gig_dbg(DEBUG_TRANSCMD, "string: %s", p);
 437
 438         if (!*p)
 439                 return -1;
 440
 441         do {
 442                 if (v > (INT_MAX - 15) / 16)
 443                         return -1;
 444                 c = *p;
 445                 if (c >= '0' && c <= '9')
 446                         c -= '0';
 447                 else if (c >= 'a' && c <= 'f')
 448                         c -= 'a' - 10;
 449                 else if (c >= 'A' && c <= 'F')
 450                         c -= 'A' - 10;
 451                 else
 452                         return -1;
 453                 v = v * 16 + c;
 454         } while (*++p);
 455
 456         return v;
 457 }
 458
 459 /* retrieve CID from parsed response
 460  * returns 0 if no CID, -1 if invalid CID, or CID value 1..65535
 461  */
 462 static int cid_of_response(char *s)
 463 {
 464         int cid;
 465
 466         if (s[-1] != ';')
 467                 return 0;       /* no CID separator */
 468         cid = isdn_getnum(s);
 469         if (cid < 0)
 470                 return 0;       /* CID not numeric */
 471         if (cid < 1 || cid > 65535)
 472                 return -1;      /* CID out of range */
 473         return cid;
 474         //FIXME is ;<digit>+ at end of non-CID response really impossible?
 475 }
 476
 477 /* This function will be called via task queue from the callback handler.
 478  * We received a modem response and have to handle it..
 479  */
 480 void gigaset_handle_modem_response(struct cardstate *cs)
 481 {
 482         unsigned char *argv[MAX_REC_PARAMS + 1];
 483         int params;
 484         int i, j;
 485         const struct resp_type_t *rt;
 486         int curarg;
 487         unsigned long flags;
 488         unsigned next, tail, head;
 489         struct event_t *event;
 490         int resp_code;
 491         int param_type;
 492         int abort;
 493         size_t len;
 494         int cid;
 495         int rawstring;
 496
 497         len = cs->cbytes;
 498         if (!len) {
 499                 /* ignore additional LFs/CRs (M10x config mode or cx100) */
 500                 gig_dbg(DEBUG_MCMD, "skipped EOL [%02X]", cs->respdata[len]);
 501                 return;
 502         }
 503         cs->respdata[len] = 0;
 504         gig_dbg(DEBUG_TRANSCMD, "raw string: '%s'", cs->respdata);
 505         argv[0] = cs->respdata;
 506         params = 1;
 507         if (cs->at_state.getstring) {
 508                 /* getstring only allowed without cid at the moment */
 509                 cs->at_state.getstring = 0;
 510                 rawstring = 1;
 511                 cid = 0;
 512         } else {
 513                 /* parse line */
 514                 for (i = 0; i < len; i++)
 515                         switch (cs->respdata[i]) {
 516                         case ';':
 517                         case ',':
 518                         case '=':
 519                                 if (params > MAX_REC_PARAMS) {
 520                                         dev_warn(cs->dev,
 521                                            "too many parameters in response\n");
 522                                         /* need last parameter (might be CID) */
 523                                         params--;
 524                                 }
 525                                 argv[params++] = cs->respdata + i + 1;
 526                         }
 527
 528                 rawstring = 0;
 529                 cid = params > 1 ? cid_of_response(argv[params-1]) : 0;
 530                 if (cid < 0) {
 531                         gigaset_add_event(cs, &cs->at_state, RSP_INVAL,
 532                                           NULL, 0, NULL);
 533                         return;
 534                 }
 535
 536                 for (j = 1; j < params; ++j)
 537                         argv[j][-1] = 0;
 538
 539                 gig_dbg(DEBUG_TRANSCMD, "CMD received: %s", argv[0]);
 540                 if (cid) {
 541                         --params;
 542                         gig_dbg(DEBUG_TRANSCMD, "CID: %s", argv[params]);
 543                 }
 544                 gig_dbg(DEBUG_TRANSCMD, "available params: %d", params - 1);
 545                 for (j = 1; j < params; j++)
 546                         gig_dbg(DEBUG_TRANSCMD, "param %d: %s", j, argv[j]);
 547         }
 548
 549         spin_lock_irqsave(&cs->ev_lock, flags);
 550         head = cs->ev_head;
 551         tail = cs->ev_tail;
 552
 553         abort = 1;
 554         curarg = 0;
 555         while (curarg < params) {
 556                 next = (tail + 1) % MAX_EVENTS;
 557                 if (unlikely(next == head)) {
 558                         dev_err(cs->dev, "event queue full\n");
 559                         break;
 560                 }
 561
 562                 event = cs->events + tail;
 563                 event->at_state = NULL;
 564                 event->cid = cid;
 565                 event->ptr = NULL;
 566                 event->arg = NULL;
 567                 tail = next;
 568
 569                 if (rawstring) {
 570                         resp_code = RSP_STRING;
 571                         param_type = RT_STRING;
 572                 } else {
 573                         for (rt = resp_type; rt->response; ++rt)
 574                                 if (!strcmp(argv[curarg], rt->response))
 575                                         break;
 576
 577                         if (!rt->response) {
 578                                 event->type = RSP_UNKNOWN;
 579                                 dev_warn(cs->dev,
 580                                          "unknown modem response: %s\n",
 581                                          argv[curarg]);
 582                                 break;
 583                         }
 584
 585                         resp_code = rt->resp_code;
 586                         param_type = rt->type;
 587                         ++curarg;
 588                 }
 589
 590                 event->type = resp_code;
 591
 592                 switch (param_type) {
 593                 case RT_NOTHING:
 594                         break;
 595                 case RT_RING:
 596                         if (!cid) {
 597                                 dev_err(cs->dev,
 598                                         "received RING without CID!\n");
 599                                 event->type = RSP_INVAL;
 600                                 abort = 1;
 601                         } else {
 602                                 event->cid = 0;
 603                                 event->parameter = cid;
 604                                 abort = 0;
 605                         }
 606                         break;
 607                 case RT_ZSAU:
 608                         if (curarg >= params) {
 609                                 event->parameter = ZSAU_NONE;
 610                                 break;
 611                         }
 612                         if (!strcmp(argv[curarg], "OUTGOING_CALL_PROCEEDING"))
 613                                 event->parameter = ZSAU_OUTGOING_CALL_PROCEEDING;
 614                         else if (!strcmp(argv[curarg], "CALL_DELIVERED"))
 615                                 event->parameter = ZSAU_CALL_DELIVERED;
 616                         else if (!strcmp(argv[curarg], "ACTIVE"))
 617                                 event->parameter = ZSAU_ACTIVE;
 618                         else if (!strcmp(argv[curarg], "DISCONNECT_IND"))
 619                                 event->parameter = ZSAU_DISCONNECT_IND;
 620                         else if (!strcmp(argv[curarg], "NULL"))
 621                                 event->parameter = ZSAU_NULL;
 622                         else if (!strcmp(argv[curarg], "DISCONNECT_REQ"))
 623                                 event->parameter = ZSAU_DISCONNECT_REQ;
 624                         else {
 625                                 event->parameter = ZSAU_UNKNOWN;
 626                                 dev_warn(cs->dev,
 627                                         "%s: unknown parameter %s after ZSAU\n",
 628                                          __func__, argv[curarg]);
 629                         }
 630                         ++curarg;
 631                         break;
 632                 case RT_STRING:
 633                         if (curarg < params) {
 634                                 event->ptr = kstrdup(argv[curarg], GFP_ATOMIC);
 635                                 if (!event->ptr)
 636                                         dev_err(cs->dev, "out of memory\n");
 637                                 ++curarg;
 638                         }
 639                         gig_dbg(DEBUG_CMD, "string==%s",
 640                                 event->ptr ? (char *) event->ptr : "NULL");
 641                         break;
 642                 case RT_ZCAU:
 643                         event->parameter = -1;
 644                         if (curarg + 1 < params) {
 645                                 i = isdn_gethex(argv[curarg]);
 646                                 j = isdn_gethex(argv[curarg + 1]);
 647                                 if (i >= 0 && i < 256 && j >= 0 && j < 256)
 648                                         event->parameter = (unsigned) i << 8
 649                                                            | j;
 650                                 curarg += 2;
 651                         } else
 652                                 curarg = params - 1;
 653                         break;
 654                 case RT_NUMBER:
 655                 case RT_HEX:
 656                         if (curarg < params) {
 657                                 if (param_type == RT_HEX)
 658                                         event->parameter =
 659                                                 isdn_gethex(argv[curarg]);
 660                                 else
 661                                         event->parameter =
 662                                                 isdn_getnum(argv[curarg]);
 663                                 ++curarg;
 664                         } else
 665                                 event->parameter = -1;
 666                         gig_dbg(DEBUG_CMD, "parameter==%d", event->parameter);
 667                         break;
 668                 }
 669
 670                 if (resp_code == RSP_ZDLE)
 671                         cs->dle = event->parameter;
 672
 673                 if (abort)
 674                         break;
 675         }
 676
 677         cs->ev_tail = tail;
 678         spin_unlock_irqrestore(&cs->ev_lock, flags);
 679
 680         if (curarg != params)
 681                 gig_dbg(DEBUG_ANY,
 682                         "invalid number of processed parameters: %d/%d",
 683                         curarg, params);
 684 }
 685 EXPORT_SYMBOL_GPL(gigaset_handle_modem_response);
 686
 687 /* disconnect
 688  * process closing of connection associated with given AT state structure
 689  */
 690 static void disconnect(struct at_state_t **at_state_p)
 691 {
 692         unsigned long flags;
 693         struct bc_state *bcs = (*at_state_p)->bcs;
 694         struct cardstate *cs = (*at_state_p)->cs;
 695
 696         spin_lock_irqsave(&cs->lock, flags);
 697         ++(*at_state_p)->seq_index;
 698
 699         /* revert to selected idle mode */
 700         if (!cs->cidmode) {
 701                 cs->at_state.pending_commands |= PC_UMMODE;
 702                 cs->commands_pending = 1;
 703                 gig_dbg(DEBUG_CMD, "Scheduling PC_UMMODE");
 704         }
 705         spin_unlock_irqrestore(&cs->lock, flags);
 706
 707         if (bcs) {
 708                 /* B channel assigned: invoke hardware specific handler */
 709                 cs->ops->close_bchannel(bcs);
 710         } else {
 711                 /* no B channel assigned: just deallocate */
 712                 spin_lock_irqsave(&cs->lock, flags);
 713                 list_del(&(*at_state_p)->list);
 714                 kfree(*at_state_p);
 715                 *at_state_p = NULL;
 716                 spin_unlock_irqrestore(&cs->lock, flags);
 717         }
 718 }
 719
 720 /* get_free_channel
 721  * get a free AT state structure: either one of those associated with the
 722  * B channels of the Gigaset device, or if none of those is available,
 723  * a newly allocated one with bcs=NULL
 724  * The structure should be freed by calling disconnect() after use.
 725  */
 726 static inline struct at_state_t *get_free_channel(struct cardstate *cs,
 727                                                   int cid)
 728 /* cids: >0: siemens-cid
 729           0: without cid
 730          -1: no cid assigned yet
 731 */
 732 {
 733         unsigned long flags;
 734         int i;
 735         struct at_state_t *ret;
 736
 737         for (i = 0; i < cs->channels; ++i)
 738                 if (gigaset_get_channel(cs->bcs + i)) {
 739                         ret = &cs->bcs[i].at_state;
 740                         ret->cid = cid;
 741                         return ret;
 742                 }
 743
 744         spin_lock_irqsave(&cs->lock, flags);
 745         ret = kmalloc(sizeof(struct at_state_t), GFP_ATOMIC);
 746         if (ret) {
 747                 gigaset_at_init(ret, NULL, cs, cid);
 748                 list_add(&ret->list, &cs->temp_at_states);
 749         }
 750         spin_unlock_irqrestore(&cs->lock, flags);
 751         return ret;
 752 }
 753
 754 static void init_failed(struct cardstate *cs, int mode)
 755 {
 756         int i;
 757         struct at_state_t *at_state;
 758
 759         cs->at_state.pending_commands &= ~PC_INIT;
 760         cs->mode = mode;
 761         cs->mstate = MS_UNINITIALIZED;
 762         gigaset_free_channels(cs);
 763         for (i = 0; i < cs->channels; ++i) {
 764                 at_state = &cs->bcs[i].at_state;
 765                 if (at_state->pending_commands & PC_CID) {
 766                         at_state->pending_commands &= ~PC_CID;
 767                         at_state->pending_commands |= PC_NOCID;
 768                         cs->commands_pending = 1;
 769                 }
 770         }
 771 }
 772
 773 static void schedule_init(struct cardstate *cs, int state)
 774 {
 775         if (cs->at_state.pending_commands & PC_INIT) {
 776                 gig_dbg(DEBUG_CMD, "not scheduling PC_INIT again");
 777                 return;
 778         }
 779         cs->mstate = state;
 780         cs->mode = M_UNKNOWN;
 781         gigaset_block_channels(cs);
 782         cs->at_state.pending_commands |= PC_INIT;
 783         cs->commands_pending = 1;
 784         gig_dbg(DEBUG_CMD, "Scheduling PC_INIT");
 785 }
 786
 787 /* Add "AT" to a command, add the cid, dle encode it, send the result to the
 788    hardware. */
 789 static void send_command(struct cardstate *cs, const char *cmd, int cid,
 790                          int dle, gfp_t kmallocflags)
 791 {
 792         size_t cmdlen, buflen;
 793         char *cmdpos, *cmdbuf, *cmdtail;
 794
 795         cmdlen = strlen(cmd);
 796         buflen = 11 + cmdlen;
 797         if (unlikely(buflen <= cmdlen)) {
 798                 dev_err(cs->dev, "integer overflow in buflen\n");
 799                 return;
 800         }
 801
 802         cmdbuf = kmalloc(buflen, kmallocflags);
 803         if (unlikely(!cmdbuf)) {
 804                 dev_err(cs->dev, "out of memory\n");
 805                 return;
 806         }
 807
 808         cmdpos = cmdbuf + 9;
 809         cmdtail = cmdpos + cmdlen;
 810         memcpy(cmdpos, cmd, cmdlen);
 811
 812         if (cid > 0 && cid <= 65535) {
 813                 do {
 814                         *--cmdpos = '0' + cid % 10;
 815                         cid /= 10;
 816                         ++cmdlen;
 817                 } while (cid);
 818         }
 819
 820         cmdlen += 2;
 821         *--cmdpos = 'T';
 822         *--cmdpos = 'A';
 823
 824         if (dle) {
 825                 cmdlen += 4;
 826                 *--cmdpos = '(';
 827                 *--cmdpos = 0x10;
 828                 *cmdtail++ = 0x10;
 829                 *cmdtail++ = ')';
 830         }
 831
 832         cs->ops->write_cmd(cs, cmdpos, cmdlen, NULL);
 833         kfree(cmdbuf);
 834 }
 835
 836 static struct at_state_t *at_state_from_cid(struct cardstate *cs, int cid)
 837 {
 838         struct at_state_t *at_state;
 839         int i;
 840         unsigned long flags;
 841
 842         if (cid == 0)
 843                 return &cs->at_state;
 844
 845         for (i = 0; i < cs->channels; ++i)
 846                 if (cid == cs->bcs[i].at_state.cid)
 847                         return &cs->bcs[i].at_state;
 848
 849         spin_lock_irqsave(&cs->lock, flags);
 850
 851         list_for_each_entry(at_state, &cs->temp_at_states, list)
 852                 if (cid == at_state->cid) {
 853                         spin_unlock_irqrestore(&cs->lock, flags);
 854                         return at_state;
 855                 }
 856
 857         spin_unlock_irqrestore(&cs->lock, flags);
 858
 859         return NULL;
 860 }
 861
 862 static void bchannel_down(struct bc_state *bcs)
 863 {
 864         if (bcs->chstate & CHS_B_UP) {
 865                 bcs->chstate &= ~CHS_B_UP;
 866                 gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BHUP);
 867         }
 868
 869         if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
 870                 bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
 871                 gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DHUP);
 872         }
 873
 874         gigaset_free_channel(bcs);
 875
 876         gigaset_bcs_reinit(bcs);
 877 }
 878
 879 static void bchannel_up(struct bc_state *bcs)
 880 {
 881         if (bcs->chstate & CHS_B_UP) {
 882                 dev_notice(bcs->cs->dev, "%s: B channel already up\n",
 883                            __func__);
 884                 return;
 885         }
 886
 887         bcs->chstate |= CHS_B_UP;
 888         gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BCONN);
 889 }
 890
 891 static void start_dial(struct at_state_t *at_state, void *data, unsigned seq_index)
 892 {
 893         struct bc_state *bcs = at_state->bcs;
 894         struct cardstate *cs = at_state->cs;
 895         int retval;
 896         unsigned long flags;
 897
 898         bcs->chstate |= CHS_NOTIFY_LL;
 899
 900         spin_lock_irqsave(&cs->lock, flags);
 901         if (at_state->seq_index != seq_index) {
 902                 spin_unlock_irqrestore(&cs->lock, flags);
 903                 goto error;
 904         }
 905         spin_unlock_irqrestore(&cs->lock, flags);
 906
 907         retval = gigaset_isdn_setup_dial(at_state, data);
 908         if (retval != 0)
 909                 goto error;
 910
 911
 912         at_state->pending_commands |= PC_CID;
 913         gig_dbg(DEBUG_CMD, "Scheduling PC_CID");
 914         cs->commands_pending = 1;
 915         return;
 916
 917 error:
 918         at_state->pending_commands |= PC_NOCID;
 919         gig_dbg(DEBUG_CMD, "Scheduling PC_NOCID");
 920         cs->commands_pending = 1;
 921         return;
 922 }
 923
 924 static void start_accept(struct at_state_t *at_state)
 925 {
 926         struct cardstate *cs = at_state->cs;
 927         int retval;
 928
 929         retval = gigaset_isdn_setup_accept(at_state);
 930
 931         if (retval == 0) {
 932                 at_state->pending_commands |= PC_ACCEPT;
 933                 gig_dbg(DEBUG_CMD, "Scheduling PC_ACCEPT");
 934                 cs->commands_pending = 1;
 935         } else {
 936                 /* error reset */
 937                 at_state->pending_commands |= PC_HUP;
 938                 gig_dbg(DEBUG_CMD, "Scheduling PC_HUP");
 939                 cs->commands_pending = 1;
 940         }
 941 }
 942
 943 static void do_start(struct cardstate *cs)
 944 {
 945         gigaset_free_channels(cs);
 946
 947         if (cs->mstate != MS_LOCKED)
 948                 schedule_init(cs, MS_INIT);
 949
 950         cs->isdn_up = 1;
 951         gigaset_i4l_cmd(cs, ISDN_STAT_RUN);
 952                                         // FIXME: not in locked mode
 953                                         // FIXME 2: only after init sequence
 954
 955         cs->waiting = 0;
 956         wake_up(&cs->waitqueue);
 957 }
 958
 959 static void finish_shutdown(struct cardstate *cs)
 960 {
 961         if (cs->mstate != MS_LOCKED) {
 962                 cs->mstate = MS_UNINITIALIZED;
 963                 cs->mode = M_UNKNOWN;
 964         }
 965
 966         /* Tell the LL that the device is not available .. */
 967         if (cs->isdn_up) {
 968                 cs->isdn_up = 0;
 969                 gigaset_i4l_cmd(cs, ISDN_STAT_STOP);
 970         }
 971
 972         /* The rest is done by cleanup_cs () in user mode. */
 973
 974         cs->cmd_result = -ENODEV;
 975         cs->waiting = 0;
 976         wake_up(&cs->waitqueue);
 977 }
 978
 979 static void do_shutdown(struct cardstate *cs)
 980 {
 981         gigaset_block_channels(cs);
 982
 983         if (cs->mstate == MS_READY) {
 984                 cs->mstate = MS_SHUTDOWN;
 985                 cs->at_state.pending_commands |= PC_SHUTDOWN;
 986                 cs->commands_pending = 1;
 987                 gig_dbg(DEBUG_CMD, "Scheduling PC_SHUTDOWN");
 988         } else
 989                 finish_shutdown(cs);
 990 }
 991
 992 static void do_stop(struct cardstate *cs)
 993 {
 994         unsigned long flags;
 995
 996         spin_lock_irqsave(&cs->lock, flags);
 997         cs->connected = 0;
 998         spin_unlock_irqrestore(&cs->lock, flags);
 999
1000         do_shutdown(cs);
1001 }
1002
1003 /* Entering cid mode or getting a cid failed:
1004  * try to initialize the device and try again.
1005  *
1006  * channel >= 0: getting cid for the channel failed
1007  * channel < 0:  entering cid mode failed
1008  *
1009  * returns 0 on failure
1010  */
1011 static int reinit_and_retry(struct cardstate *cs, int channel)
1012 {
1013         int i;
1014
1015         if (--cs->retry_count <= 0)
1016                 return 0;
1017
1018         for (i = 0; i < cs->channels; ++i)
1019                 if (cs->bcs[i].at_state.cid > 0)
1020                         return 0;
1021
1022         if (channel < 0)
1023                 dev_warn(cs->dev,
1024                     "Could not enter cid mode. Reinit device and try again.\n");
1025         else {
1026                 dev_warn(cs->dev,
1027                     "Could not get a call id. Reinit device and try again.\n");
1028                 cs->bcs[channel].at_state.pending_commands |= PC_CID;
1029         }
1030         schedule_init(cs, MS_INIT);
1031         return 1;
1032 }
1033
1034 static int at_state_invalid(struct cardstate *cs,
1035                             struct at_state_t *test_ptr)
1036 {
1037         unsigned long flags;
1038         unsigned channel;
1039         struct at_state_t *at_state;
1040         int retval = 0;
1041
1042         spin_lock_irqsave(&cs->lock, flags);
1043
1044         if (test_ptr == &cs->at_state)
1045                 goto exit;
1046
1047         list_for_each_entry(at_state, &cs->temp_at_states, list)
1048                 if (at_state == test_ptr)
1049                         goto exit;
1050
1051         for (channel = 0; channel < cs->channels; ++channel)
1052                 if (&cs->bcs[channel].at_state == test_ptr)
1053                         goto exit;
1054
1055         retval = 1;
1056 exit:
1057         spin_unlock_irqrestore(&cs->lock, flags);
1058         return retval;
1059 }
1060
1061 static void handle_icall(struct cardstate *cs, struct bc_state *bcs,
1062                          struct at_state_t **p_at_state)
1063 {
1064         int retval;
1065         struct at_state_t *at_state = *p_at_state;
1066
1067         retval = gigaset_isdn_icall(at_state);
1068         switch (retval) {
1069         case ICALL_ACCEPT:
1070                 break;
1071         default:
1072                 dev_err(cs->dev, "internal error: disposition=%d\n", retval);
1073                 /* --v-- fall through --v-- */
1074         case ICALL_IGNORE:
1075         case ICALL_REJECT:
1076                 /* hang up actively
1077                  * Device doc says that would reject the call.
1078                  * In fact it doesn't.
1079                  */
1080                 at_state->pending_commands |= PC_HUP;
1081                 cs->commands_pending = 1;
1082                 break;
1083         }
1084 }
1085
1086 static int do_lock(struct cardstate *cs)
1087 {
1088         int mode;
1089         int i;
1090
1091         switch (cs->mstate) {
1092         case MS_UNINITIALIZED:
1093         case MS_READY:
1094                 if (cs->cur_at_seq || !list_empty(&cs->temp_at_states) ||
1095                     cs->at_state.pending_commands)
1096                         return -EBUSY;
1097
1098                 for (i = 0; i < cs->channels; ++i)
1099                         if (cs->bcs[i].at_state.pending_commands)
1100                                 return -EBUSY;
1101
1102                 if (!gigaset_get_channels(cs))
1103                         return -EBUSY;
1104
1105                 break;
1106         case MS_LOCKED:
1107                 //retval = -EACCES;
1108                 break;
1109         default:
1110                 return -EBUSY;
1111         }
1112
1113         mode = cs->mode;
1114         cs->mstate = MS_LOCKED;
1115         cs->mode = M_UNKNOWN;
1116
1117         return mode;
1118 }
1119
1120 static int do_unlock(struct cardstate *cs)
1121 {
1122         if (cs->mstate != MS_LOCKED)
1123                 return -EINVAL;
1124
1125         cs->mstate = MS_UNINITIALIZED;
1126         cs->mode = M_UNKNOWN;
1127         gigaset_free_channels(cs);
1128         if (cs->connected)
1129                 schedule_init(cs, MS_INIT);
1130
1131         return 0;
1132 }
1133
1134 static void do_action(int action, struct cardstate *cs,
1135                       struct bc_state *bcs,
1136                       struct at_state_t **p_at_state, char **pp_command,
1137                       int *p_genresp, int *p_resp_code,
1138                       struct event_t *ev)
1139 {
1140         struct at_state_t *at_state = *p_at_state;
1141         struct at_state_t *at_state2;
1142         unsigned long flags;
1143
1144         int channel;
1145
1146         unsigned char *s, *e;
1147         int i;
1148         unsigned long val;
1149
1150         switch (action) {
1151         case ACT_NOTHING:
1152                 break;
1153         case ACT_TIMEOUT:
1154                 at_state->waiting = 1;
1155                 break;
1156         case ACT_INIT:
1157                 cs->at_state.pending_commands &= ~PC_INIT;
1158                 cs->cur_at_seq = SEQ_NONE;
1159                 cs->mode = M_UNIMODEM;
1160                 spin_lock_irqsave(&cs->lock, flags);
1161                 if (!cs->cidmode) {
1162                         spin_unlock_irqrestore(&cs->lock, flags);
1163                         gigaset_free_channels(cs);
1164                         cs->mstate = MS_READY;
1165                         break;
1166                 }
1167                 spin_unlock_irqrestore(&cs->lock, flags);
1168                 cs->at_state.pending_commands |= PC_CIDMODE;
1169                 cs->commands_pending = 1;
1170                 gig_dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
1171                 break;
1172         case ACT_FAILINIT:
1173                 dev_warn(cs->dev, "Could not initialize the device.\n");
1174                 cs->dle = 0;
1175                 init_failed(cs, M_UNKNOWN);
1176                 cs->cur_at_seq = SEQ_NONE;
1177                 break;
1178         case ACT_CONFIGMODE:
1179                 init_failed(cs, M_CONFIG);
1180                 cs->cur_at_seq = SEQ_NONE;
1181                 break;
1182         case ACT_SETDLE1:
1183                 cs->dle = 1;
1184                 /* cs->inbuf[0].inputstate |= INS_command | INS_DLE_command; */
1185                 cs->inbuf[0].inputstate &=
1186                         ~(INS_command | INS_DLE_command);
1187                 break;
1188         case ACT_SETDLE0:
1189                 cs->dle = 0;
1190                 cs->inbuf[0].inputstate =
1191                         (cs->inbuf[0].inputstate & ~INS_DLE_command)
1192                         | INS_command;
1193                 break;
1194         case ACT_CMODESET:
1195                 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1196                         gigaset_free_channels(cs);
1197                         cs->mstate = MS_READY;
1198                 }
1199                 cs->mode = M_CID;
1200                 cs->cur_at_seq = SEQ_NONE;
1201                 break;
1202         case ACT_UMODESET:
1203                 cs->mode = M_UNIMODEM;
1204                 cs->cur_at_seq = SEQ_NONE;
1205                 break;
1206         case ACT_FAILCMODE:
1207                 cs->cur_at_seq = SEQ_NONE;
1208                 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1209                         init_failed(cs, M_UNKNOWN);
1210                         break;
1211                 }
1212                 if (!reinit_and_retry(cs, -1))
1213                         schedule_init(cs, MS_RECOVER);
1214                 break;
1215         case ACT_FAILUMODE:
1216                 cs->cur_at_seq = SEQ_NONE;
1217                 schedule_init(cs, MS_RECOVER);
1218                 break;
1219         case ACT_HUPMODEM:
1220                 /* send "+++" (hangup in unimodem mode) */
1221                 if (cs->connected)
1222                         cs->ops->write_cmd(cs, "+++", 3, NULL);
1223                 break;
1224         case ACT_RING:
1225                 /* get fresh AT state structure for new CID */
1226                 at_state2 = get_free_channel(cs, ev->parameter);
1227                 if (!at_state2) {
1228                         dev_warn(cs->dev,
1229                         "RING ignored: could not allocate channel structure\n");
1230                         break;
1231                 }
1232
1233                 /* initialize AT state structure
1234                  * note that bcs may be NULL if no B channel is free
1235                  */
1236                 at_state2->ConState = 700;
1237                 kfree(at_state2->str_var[STR_NMBR]);
1238                 at_state2->str_var[STR_NMBR] = NULL;
1239                 kfree(at_state2->str_var[STR_ZCPN]);
1240                 at_state2->str_var[STR_ZCPN] = NULL;
1241                 kfree(at_state2->str_var[STR_ZBC]);
1242                 at_state2->str_var[STR_ZBC] = NULL;
1243                 kfree(at_state2->str_var[STR_ZHLC]);
1244                 at_state2->str_var[STR_ZHLC] = NULL;
1245                 at_state2->int_var[VAR_ZCTP] = -1;
1246
1247                 spin_lock_irqsave(&cs->lock, flags);
1248                 at_state2->timer_expires = RING_TIMEOUT;
1249                 at_state2->timer_active = 1;
1250                 spin_unlock_irqrestore(&cs->lock, flags);
1251                 break;
1252         case ACT_ICALL:
1253                 handle_icall(cs, bcs, p_at_state);
1254                 break;
1255         case ACT_FAILSDOWN:
1256                 dev_warn(cs->dev, "Could not shut down the device.\n");
1257                 /* fall through */
1258         case ACT_FAKESDOWN:
1259         case ACT_SDOWN:
1260                 cs->cur_at_seq = SEQ_NONE;
1261                 finish_shutdown(cs);
1262                 break;
1263         case ACT_CONNECT:
1264                 if (cs->onechannel) {
1265                         at_state->pending_commands |= PC_DLE1;
1266                         cs->commands_pending = 1;
1267                         break;
1268                 }
1269                 bcs->chstate |= CHS_D_UP;
1270                 gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
1271                 cs->ops->init_bchannel(bcs);
1272                 break;
1273         case ACT_DLE1:
1274                 cs->cur_at_seq = SEQ_NONE;
1275                 bcs = cs->bcs + cs->curchannel;
1276
1277                 bcs->chstate |= CHS_D_UP;
1278                 gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
1279                 cs->ops->init_bchannel(bcs);
1280                 break;
1281         case ACT_FAKEHUP:
1282                 at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
1283                 /* fall through */
1284         case ACT_DISCONNECT:
1285                 cs->cur_at_seq = SEQ_NONE;
1286                 at_state->cid = -1;
1287                 if (bcs && cs->onechannel && cs->dle) {
1288                         /* Check for other open channels not needed:
1289                          * DLE only used for M10x with one B channel.
1290                          */
1291                         at_state->pending_commands |= PC_DLE0;
1292                         cs->commands_pending = 1;
1293                 } else
1294                         disconnect(p_at_state);
1295                 break;
1296         case ACT_FAKEDLE0:
1297                 at_state->int_var[VAR_ZDLE] = 0;
1298                 cs->dle = 0;
1299                 /* fall through */
1300         case ACT_DLE0:
1301                 cs->cur_at_seq = SEQ_NONE;
1302                 at_state2 = &cs->bcs[cs->curchannel].at_state;
1303                 disconnect(&at_state2);
1304                 break;
1305         case ACT_ABORTHUP:
1306                 cs->cur_at_seq = SEQ_NONE;
1307                 dev_warn(cs->dev, "Could not hang up.\n");
1308                 at_state->cid = -1;
1309                 if (bcs && cs->onechannel)
1310                         at_state->pending_commands |= PC_DLE0;
1311                 else
1312                         disconnect(p_at_state);
1313                 schedule_init(cs, MS_RECOVER);
1314                 break;
1315         case ACT_FAILDLE0:
1316                 cs->cur_at_seq = SEQ_NONE;
1317                 dev_warn(cs->dev, "Could not leave DLE mode.\n");
1318                 at_state2 = &cs->bcs[cs->curchannel].at_state;
1319                 disconnect(&at_state2);
1320                 schedule_init(cs, MS_RECOVER);
1321                 break;
1322         case ACT_FAILDLE1:
1323                 cs->cur_at_seq = SEQ_NONE;
1324                 dev_warn(cs->dev,
1325                          "Could not enter DLE mode. Trying to hang up.\n");
1326                 channel = cs->curchannel;
1327                 cs->bcs[channel].at_state.pending_commands |= PC_HUP;
1328                 cs->commands_pending = 1;
1329                 break;
1330
1331         case ACT_CID: /* got cid; start dialing */
1332                 cs->cur_at_seq = SEQ_NONE;
1333                 channel = cs->curchannel;
1334                 if (ev->parameter > 0 && ev->parameter <= 65535) {
1335                         cs->bcs[channel].at_state.cid = ev->parameter;
1336                         cs->bcs[channel].at_state.pending_commands |=
1337                                 PC_DIAL;
1338                         cs->commands_pending = 1;
1339                         break;
1340                 }
1341                 /* fall through */
1342         case ACT_FAILCID:
1343                 cs->cur_at_seq = SEQ_NONE;
1344                 channel = cs->curchannel;
1345                 if (!reinit_and_retry(cs, channel)) {
1346                         dev_warn(cs->dev,
1347                                  "Could not get a call ID. Cannot dial.\n");
1348                         at_state2 = &cs->bcs[channel].at_state;
1349                         disconnect(&at_state2);
1350                 }
1351                 break;
1352         case ACT_ABORTCID:
1353                 cs->cur_at_seq = SEQ_NONE;
1354                 at_state2 = &cs->bcs[cs->curchannel].at_state;
1355                 disconnect(&at_state2);
1356                 break;
1357
1358         case ACT_DIALING:
1359         case ACT_ACCEPTED:
1360                 cs->cur_at_seq = SEQ_NONE;
1361                 break;
1362
1363         case ACT_ABORTACCEPT:   /* hangup/error/timeout during ICALL processing */
1364                 disconnect(p_at_state);
1365                 break;
1366
1367         case ACT_ABORTDIAL:     /* error/timeout during dial preparation */
1368                 cs->cur_at_seq = SEQ_NONE;
1369                 at_state->pending_commands |= PC_HUP;
1370                 cs->commands_pending = 1;
1371                 break;
1372
1373         case ACT_REMOTEREJECT:  /* DISCONNECT_IND after dialling */
1374         case ACT_CONNTIMEOUT:   /* timeout waiting for ZSAU=ACTIVE */
1375         case ACT_REMOTEHUP:     /* DISCONNECT_IND with established connection */
1376                 at_state->pending_commands |= PC_HUP;
1377                 cs->commands_pending = 1;
1378                 break;
1379         case ACT_GETSTRING: /* warning: RING, ZDLE, ...
1380                                are not handled properly anymore */
1381                 at_state->getstring = 1;
1382                 break;
1383         case ACT_SETVER:
1384                 if (!ev->ptr) {
1385                         *p_genresp = 1;
1386                         *p_resp_code = RSP_ERROR;
1387                         break;
1388                 }
1389                 s = ev->ptr;
1390
1391                 if (!strcmp(s, "OK")) {
1392                         *p_genresp = 1;
1393                         *p_resp_code = RSP_ERROR;
1394                         break;
1395                 }
1396
1397                 for (i = 0; i < 4; ++i) {
1398                         val = simple_strtoul(s, (char **) &e, 10);
1399                         if (val > INT_MAX || e == s)
1400                                 break;
1401                         if (i == 3) {
1402                                 if (*e)
1403                                         break;
1404                         } else if (*e != '.')
1405                                 break;
1406                         else
1407                                 s = e + 1;
1408                         cs->fwver[i] = val;
1409                 }
1410                 if (i != 4) {
1411                         *p_genresp = 1;
1412                         *p_resp_code = RSP_ERROR;
1413                         break;
1414                 }
1415                 /*at_state->getstring = 1;*/
1416                 cs->gotfwver = 0;
1417                 break;
1418         case ACT_GOTVER:
1419                 if (cs->gotfwver == 0) {
1420                         cs->gotfwver = 1;
1421                         gig_dbg(DEBUG_ANY,
1422                                 "firmware version %02d.%03d.%02d.%02d",
1423                                 cs->fwver[0], cs->fwver[1],
1424                                 cs->fwver[2], cs->fwver[3]);
1425                         break;
1426                 }
1427                 /* fall through */
1428         case ACT_FAILVER:
1429                 cs->gotfwver = -1;
1430                 dev_err(cs->dev, "could not read firmware version.\n");
1431                 break;
1432 #ifdef CONFIG_GIGASET_DEBUG
1433         case ACT_ERROR:
1434                 *p_genresp = 1;
1435                 *p_resp_code = RSP_ERROR;
1436                 break;
1437         case ACT_TEST:
1438                 {
1439                         static int count = 3; //2; //1;
1440                         *p_genresp = 1;
1441                         *p_resp_code = count ? RSP_ERROR : RSP_OK;
1442                         if (count > 0)
1443                                 --count;
1444                 }
1445                 break;
1446 #endif
1447         case ACT_DEBUG:
1448                 gig_dbg(DEBUG_ANY, "%s: resp_code %d in ConState %d",
1449                         __func__, ev->type, at_state->ConState);
1450                 break;
1451         case ACT_WARN:
1452                 dev_warn(cs->dev, "%s: resp_code %d in ConState %d!\n",
1453                          __func__, ev->type, at_state->ConState);
1454                 break;
1455         case ACT_ZCAU:
1456                 dev_warn(cs->dev, "cause code %04x in connection state %d.\n",
1457                          ev->parameter, at_state->ConState);
1458                 break;
1459
1460         /* events from the LL */
1461         case ACT_DIAL:
1462                 start_dial(at_state, ev->ptr, ev->parameter);
1463                 break;
1464         case ACT_ACCEPT:
1465                 start_accept(at_state);
1466                 break;
1467         case ACT_PROTO_L2:
1468                 gig_dbg(DEBUG_CMD, "set protocol to %u",
1469                         (unsigned) ev->parameter);
1470                 at_state->bcs->proto2 = ev->parameter;
1471                 break;
1472         case ACT_HUP:
1473                 at_state->pending_commands |= PC_HUP;
1474                 cs->commands_pending = 1;
1475                 gig_dbg(DEBUG_CMD, "Scheduling PC_HUP");
1476                 break;
1477
1478         /* hotplug events */
1479         case ACT_STOP:
1480                 do_stop(cs);
1481                 break;
1482         case ACT_START:
1483                 do_start(cs);
1484                 break;
1485
1486         /* events from the interface */ // FIXME without ACT_xxxx?
1487         case ACT_IF_LOCK:
1488                 cs->cmd_result = ev->parameter ? do_lock(cs) : do_unlock(cs);
1489                 cs->waiting = 0;
1490                 wake_up(&cs->waitqueue);
1491                 break;
1492         case ACT_IF_VER:
1493                 if (ev->parameter != 0)
1494                         cs->cmd_result = -EINVAL;
1495                 else if (cs->gotfwver != 1) {
1496                         cs->cmd_result = -ENOENT;
1497                 } else {
1498                         memcpy(ev->arg, cs->fwver, sizeof cs->fwver);
1499                         cs->cmd_result = 0;
1500                 }
1501                 cs->waiting = 0;
1502                 wake_up(&cs->waitqueue);
1503                 break;
1504
1505         /* events from the proc file system */ // FIXME without ACT_xxxx?
1506         case ACT_PROC_CIDMODE:
1507                 spin_lock_irqsave(&cs->lock, flags);
1508                 if (ev->parameter != cs->cidmode) {
1509                         cs->cidmode = ev->parameter;
1510                         if (ev->parameter) {
1511                                 cs->at_state.pending_commands |= PC_CIDMODE;
1512                                 gig_dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
1513                         } else {
1514                                 cs->at_state.pending_commands |= PC_UMMODE;
1515                                 gig_dbg(DEBUG_CMD, "Scheduling PC_UMMODE");
1516                         }
1517                         cs->commands_pending = 1;
1518                 }
1519                 spin_unlock_irqrestore(&cs->lock, flags);
1520                 cs->waiting = 0;
1521                 wake_up(&cs->waitqueue);
1522                 break;
1523
1524         /* events from the hardware drivers */
1525         case ACT_NOTIFY_BC_DOWN:
1526                 bchannel_down(bcs);
1527                 break;
1528         case ACT_NOTIFY_BC_UP:
1529                 bchannel_up(bcs);
1530                 break;
1531         case ACT_SHUTDOWN:
1532                 do_shutdown(cs);
1533                 break;
1534
1535
1536         default:
1537                 if (action >= ACT_CMD && action < ACT_CMD + AT_NUM) {
1538                         *pp_command = at_state->bcs->commands[action - ACT_CMD];
1539                         if (!*pp_command) {
1540                                 *p_genresp = 1;
1541                                 *p_resp_code = RSP_NULL;
1542                         }
1543                 } else
1544                         dev_err(cs->dev, "%s: action==%d!\n", __func__, action);
1545         }
1546 }
1547
1548 /* State machine to do the calling and hangup procedure */
1549 static void process_event(struct cardstate *cs, struct event_t *ev)
1550 {
1551         struct bc_state *bcs;
1552         char *p_command = NULL;
1553         struct reply_t *rep;
1554         int rcode;
1555         int genresp = 0;
1556         int resp_code = RSP_ERROR;
1557         int sendcid;
1558         struct at_state_t *at_state;
1559         int index;
1560         int curact;
1561         unsigned long flags;
1562
1563         if (ev->cid >= 0) {
1564                 at_state = at_state_from_cid(cs, ev->cid);
1565                 if (!at_state) {
1566                         gigaset_add_event(cs, &cs->at_state, RSP_WRONG_CID,
1567                                           NULL, 0, NULL);
1568                         return;
1569                 }
1570         } else {
1571                 at_state = ev->at_state;
1572                 if (at_state_invalid(cs, at_state)) {
1573                         gig_dbg(DEBUG_ANY, "event for invalid at_state %p",
1574                                 at_state);
1575                         return;
1576                 }
1577         }
1578
1579         gig_dbg(DEBUG_CMD, "connection state %d, event %d",
1580                 at_state->ConState, ev->type);
1581
1582         bcs = at_state->bcs;
1583         sendcid = at_state->cid;
1584
1585         /* Setting the pointer to the dial array */
1586         rep = at_state->replystruct;
1587
1588         spin_lock_irqsave(&cs->lock, flags);
1589         if (ev->type == EV_TIMEOUT) {
1590                 if (ev->parameter != at_state->timer_index
1591                     || !at_state->timer_active) {
1592                         ev->type = RSP_NONE; /* old timeout */
1593                         gig_dbg(DEBUG_ANY, "old timeout");
1594                 } else if (!at_state->waiting)
1595                         gig_dbg(DEBUG_ANY, "timeout occurred");
1596                 else
1597                         gig_dbg(DEBUG_ANY, "stopped waiting");
1598         }
1599         spin_unlock_irqrestore(&cs->lock, flags);
1600
1601         /* if the response belongs to a variable in at_state->int_var[VAR_XXXX]
1602            or at_state->str_var[STR_XXXX], set it */
1603         if (ev->type >= RSP_VAR && ev->type < RSP_VAR + VAR_NUM) {
1604                 index = ev->type - RSP_VAR;
1605                 at_state->int_var[index] = ev->parameter;
1606         } else if (ev->type >= RSP_STR && ev->type < RSP_STR + STR_NUM) {
1607                 index = ev->type - RSP_STR;
1608                 kfree(at_state->str_var[index]);
1609                 at_state->str_var[index] = ev->ptr;
1610                 ev->ptr = NULL; /* prevent process_events() from
1611                                    deallocating ptr */
1612         }
1613
1614         if (ev->type == EV_TIMEOUT || ev->type == RSP_STRING)
1615                 at_state->getstring = 0;
1616
1617         /* Search row in dial array which matches modem response and current
1618            constate */
1619         for (;; rep++) {
1620                 rcode = rep->resp_code;
1621                 if (rcode == RSP_LAST) {
1622                         /* found nothing...*/
1623                         dev_warn(cs->dev, "%s: rcode=RSP_LAST: "
1624                                         "resp_code %d in ConState %d!\n",
1625                                  __func__, ev->type, at_state->ConState);
1626                         return;
1627                 }
1628                 if ((rcode == RSP_ANY || rcode == ev->type)
1629                   && ((int) at_state->ConState >= rep->min_ConState)
1630                   && (rep->max_ConState < 0
1631                       || (int) at_state->ConState <= rep->max_ConState)
1632                   && (rep->parameter < 0 || rep->parameter == ev->parameter))
1633                         break;
1634         }
1635
1636         p_command = rep->command;
1637
1638         at_state->waiting = 0;
1639         for (curact = 0; curact < MAXACT; ++curact) {
1640                 /* The row tells us what we should do  ..
1641                  */
1642                 do_action(rep->action[curact], cs, bcs, &at_state, &p_command, &genresp, &resp_code, ev);
1643                 if (!at_state)
1644                         break; /* may be freed after disconnect */
1645         }
1646
1647         if (at_state) {
1648                 /* Jump to the next con-state regarding the array */
1649                 if (rep->new_ConState >= 0)
1650                         at_state->ConState = rep->new_ConState;
1651
1652                 if (genresp) {
1653                         spin_lock_irqsave(&cs->lock, flags);
1654                         at_state->timer_expires = 0; //FIXME
1655                         at_state->timer_active = 0; //FIXME
1656                         spin_unlock_irqrestore(&cs->lock, flags);
1657                         gigaset_add_event(cs, at_state, resp_code, NULL, 0, NULL);
1658                 } else {
1659                         /* Send command to modem if not NULL... */
1660                         if (p_command/*rep->command*/) {
1661                                 if (cs->connected)
1662                                         send_command(cs, p_command,
1663                                                      sendcid, cs->dle,
1664                                                      GFP_ATOMIC);
1665                                 else
1666                                         gigaset_add_event(cs, at_state,
1667                                                           RSP_NODEV,
1668                                                           NULL, 0, NULL);
1669                         }
1670
1671                         spin_lock_irqsave(&cs->lock, flags);
1672                         if (!rep->timeout) {
1673                                 at_state->timer_expires = 0;
1674                                 at_state->timer_active = 0;
1675                         } else if (rep->timeout > 0) { /* new timeout */
1676                                 at_state->timer_expires = rep->timeout * 10;
1677                                 at_state->timer_active = 1;
1678                                 ++at_state->timer_index;
1679                         }
1680                         spin_unlock_irqrestore(&cs->lock, flags);
1681                 }
1682         }
1683 }
1684
1685 static void schedule_sequence(struct cardstate *cs,
1686                               struct at_state_t *at_state, int sequence)
1687 {
1688         cs->cur_at_seq = sequence;
1689         gigaset_add_event(cs, at_state, RSP_INIT, NULL, sequence, NULL);
1690 }
1691
1692 static void process_command_flags(struct cardstate *cs)
1693 {
1694         struct at_state_t *at_state = NULL;
1695         struct bc_state *bcs;
1696         int i;
1697         int sequence;
1698         unsigned long flags;
1699
1700         cs->commands_pending = 0;
1701
1702         if (cs->cur_at_seq) {
1703                 gig_dbg(DEBUG_CMD, "not searching scheduled commands: busy");
1704                 return;
1705         }
1706
1707         gig_dbg(DEBUG_CMD, "searching scheduled commands");
1708
1709         sequence = SEQ_NONE;
1710
1711         /* clear pending_commands and hangup channels on shutdown */
1712         if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1713                 cs->at_state.pending_commands &= ~PC_CIDMODE;
1714                 for (i = 0; i < cs->channels; ++i) {
1715                         bcs = cs->bcs + i;
1716                         at_state = &bcs->at_state;
1717                         at_state->pending_commands &=
1718                                 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1719                         if (at_state->cid > 0)
1720                                 at_state->pending_commands |= PC_HUP;
1721                         if (at_state->pending_commands & PC_CID) {
1722                                 at_state->pending_commands |= PC_NOCID;
1723                                 at_state->pending_commands &= ~PC_CID;
1724                         }
1725                 }
1726         }
1727
1728         /* clear pending_commands and hangup channels on reset */
1729         if (cs->at_state.pending_commands & PC_INIT) {
1730                 cs->at_state.pending_commands &= ~PC_CIDMODE;
1731                 for (i = 0; i < cs->channels; ++i) {
1732                         bcs = cs->bcs + i;
1733                         at_state = &bcs->at_state;
1734                         at_state->pending_commands &=
1735                                 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1736                         if (at_state->cid > 0)
1737                                 at_state->pending_commands |= PC_HUP;
1738                         if (cs->mstate == MS_RECOVER) {
1739                                 if (at_state->pending_commands & PC_CID) {
1740                                         at_state->pending_commands |= PC_NOCID;
1741                                         at_state->pending_commands &= ~PC_CID;
1742                                 }
1743                         }
1744                 }
1745         }
1746
1747         /* only switch back to unimodem mode, if no commands are pending and no channels are up */
1748         spin_lock_irqsave(&cs->lock, flags);
1749         if (cs->at_state.pending_commands == PC_UMMODE
1750             && !cs->cidmode
1751             && list_empty(&cs->temp_at_states)
1752             && cs->mode == M_CID) {
1753                 sequence = SEQ_UMMODE;
1754                 at_state = &cs->at_state;
1755                 for (i = 0; i < cs->channels; ++i) {
1756                         bcs = cs->bcs + i;
1757                         if (bcs->at_state.pending_commands ||
1758                             bcs->at_state.cid > 0) {
1759                                 sequence = SEQ_NONE;
1760                                 break;
1761                         }
1762                 }
1763         }
1764         spin_unlock_irqrestore(&cs->lock, flags);
1765         cs->at_state.pending_commands &= ~PC_UMMODE;
1766         if (sequence != SEQ_NONE) {
1767                 schedule_sequence(cs, at_state, sequence);
1768                 return;
1769         }
1770
1771         for (i = 0; i < cs->channels; ++i) {
1772                 bcs = cs->bcs + i;
1773                 if (bcs->at_state.pending_commands & PC_HUP) {
1774                         bcs->at_state.pending_commands &= ~PC_HUP;
1775                         if (bcs->at_state.pending_commands & PC_CID) {
1776                                 /* not yet dialing: PC_NOCID is sufficient */
1777                                 bcs->at_state.pending_commands |= PC_NOCID;
1778                                 bcs->at_state.pending_commands &= ~PC_CID;
1779                         } else {
1780                                 schedule_sequence(cs, &bcs->at_state, SEQ_HUP);
1781                                 return;
1782                         }
1783                 }
1784                 if (bcs->at_state.pending_commands & PC_NOCID) {
1785                         bcs->at_state.pending_commands &= ~PC_NOCID;
1786                         cs->curchannel = bcs->channel;
1787                         schedule_sequence(cs, &cs->at_state, SEQ_NOCID);
1788                         return;
1789                 } else if (bcs->at_state.pending_commands & PC_DLE0) {
1790                         bcs->at_state.pending_commands &= ~PC_DLE0;
1791                         cs->curchannel = bcs->channel;
1792                         schedule_sequence(cs, &cs->at_state, SEQ_DLE0);
1793                         return;
1794                 }
1795         }
1796
1797         list_for_each_entry(at_state, &cs->temp_at_states, list)
1798                 if (at_state->pending_commands & PC_HUP) {
1799                         at_state->pending_commands &= ~PC_HUP;
1800                         schedule_sequence(cs, at_state, SEQ_HUP);
1801                         return;
1802                 }
1803
1804         if (cs->at_state.pending_commands & PC_INIT) {
1805                 cs->at_state.pending_commands &= ~PC_INIT;
1806                 cs->dle = 0; //FIXME
1807                 cs->inbuf->inputstate = INS_command;
1808                 //FIXME reset card state (or -> LOCK0)?
1809                 schedule_sequence(cs, &cs->at_state, SEQ_INIT);
1810                 return;
1811         }
1812         if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1813                 cs->at_state.pending_commands &= ~PC_SHUTDOWN;
1814                 schedule_sequence(cs, &cs->at_state, SEQ_SHUTDOWN);
1815                 return;
1816         }
1817         if (cs->at_state.pending_commands & PC_CIDMODE) {
1818                 cs->at_state.pending_commands &= ~PC_CIDMODE;
1819                 if (cs->mode == M_UNIMODEM) {
1820                         cs->retry_count = 1;
1821                         schedule_sequence(cs, &cs->at_state, SEQ_CIDMODE);
1822                         return;
1823                 }
1824         }
1825
1826         for (i = 0; i < cs->channels; ++i) {
1827                 bcs = cs->bcs + i;
1828                 if (bcs->at_state.pending_commands & PC_DLE1) {
1829                         bcs->at_state.pending_commands &= ~PC_DLE1;
1830                         cs->curchannel = bcs->channel;
1831                         schedule_sequence(cs, &cs->at_state, SEQ_DLE1);
1832                         return;
1833                 }
1834                 if (bcs->at_state.pending_commands & PC_ACCEPT) {
1835                         bcs->at_state.pending_commands &= ~PC_ACCEPT;
1836                         schedule_sequence(cs, &bcs->at_state, SEQ_ACCEPT);
1837                         return;
1838                 }
1839                 if (bcs->at_state.pending_commands & PC_DIAL) {
1840                         bcs->at_state.pending_commands &= ~PC_DIAL;
1841                         schedule_sequence(cs, &bcs->at_state, SEQ_DIAL);
1842                         return;
1843                 }
1844                 if (bcs->at_state.pending_commands & PC_CID) {
1845                         switch (cs->mode) {
1846                         case M_UNIMODEM:
1847                                 cs->at_state.pending_commands |= PC_CIDMODE;
1848                                 gig_dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
1849                                 cs->commands_pending = 1;
1850                                 return;
1851 #ifdef GIG_MAYINITONDIAL
1852                         case M_UNKNOWN:
1853                                 schedule_init(cs, MS_INIT);
1854                                 return;
1855 #endif
1856                         }
1857                         bcs->at_state.pending_commands &= ~PC_CID;
1858                         cs->curchannel = bcs->channel;
1859 #ifdef GIG_RETRYCID
1860                         cs->retry_count = 2;
1861 #else
1862                         cs->retry_count = 1;
1863 #endif
1864                         schedule_sequence(cs, &cs->at_state, SEQ_CID);
1865                         return;
1866                 }
1867         }
1868 }
1869
1870 static void process_events(struct cardstate *cs)
1871 {
1872         struct event_t *ev;
1873         unsigned head, tail;
1874         int i;
1875         int check_flags = 0;
1876         int was_busy;
1877         unsigned long flags;
1878
1879         spin_lock_irqsave(&cs->ev_lock, flags);
1880         head = cs->ev_head;
1881
1882         for (i = 0; i < 2 * MAX_EVENTS; ++i) {
1883                 tail = cs->ev_tail;
1884                 if (tail == head) {
1885                         if (!check_flags && !cs->commands_pending)
1886                                 break;
1887                         check_flags = 0;
1888                         spin_unlock_irqrestore(&cs->ev_lock, flags);
1889                         process_command_flags(cs);
1890                         spin_lock_irqsave(&cs->ev_lock, flags);
1891                         tail = cs->ev_tail;
1892                         if (tail == head) {
1893                                 if (!cs->commands_pending)
1894                                         break;
1895                                 continue;
1896                         }
1897                 }
1898
1899                 ev = cs->events + head;
1900                 was_busy = cs->cur_at_seq != SEQ_NONE;
1901                 spin_unlock_irqrestore(&cs->ev_lock, flags);
1902                 process_event(cs, ev);
1903                 spin_lock_irqsave(&cs->ev_lock, flags);
1904                 kfree(ev->ptr);
1905                 ev->ptr = NULL;
1906                 if (was_busy && cs->cur_at_seq == SEQ_NONE)
1907                         check_flags = 1;
1908
1909                 head = (head + 1) % MAX_EVENTS;
1910                 cs->ev_head = head;
1911         }
1912
1913         spin_unlock_irqrestore(&cs->ev_lock, flags);
1914
1915         if (i == 2 * MAX_EVENTS) {
1916                 dev_err(cs->dev,
1917                         "infinite loop in process_events; aborting.\n");
1918         }
1919 }
1920
1921 /* tasklet scheduled on any event received from the Gigaset device
1922  * parameter:
1923  *      data    ISDN controller state structure
1924  */
1925 void gigaset_handle_event(unsigned long data)
1926 {
1927         struct cardstate *cs = (struct cardstate *) data;
1928
1929         /* handle incoming data on control/common channel */
1930         if (cs->inbuf->head != cs->inbuf->tail) {
1931                 gig_dbg(DEBUG_INTR, "processing new data");
1932                 cs->ops->handle_input(cs->inbuf);
1933         }
1934
1935         process_events(cs);
1936 }