git.oblomov.eu Git - linux-2.6/blob - 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_m10x[]= /* with dle mode */
 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_m10x[] = /* for M10x */
 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"}, /* set "Endgeraetemodus" */
 298         {RSP_OK,      607,607, -1,                608,-1},
 299         //{RSP_ZSAU,    608,608,ZSAU_PROCEEDING,    608, 0, {ACT_ERROR}},//DELETE
 300         {RSP_ZSAU,    608,608,ZSAU_PROCEEDING,    609, 5, {ACT_CMD+AT_DIAL}},
 301         {RSP_OK,      609,609, -1,                650, 0, {ACT_DIALING}},
 302
 303         {RSP_ZVLS,    608,608, 17,                 -1,-1, {ACT_DEBUG}},
 304         {RSP_ZCTP,    609,609, -1,                 -1,-1, {ACT_DEBUG}},
 305         {RSP_ZCPN,    609,609, -1,                 -1,-1, {ACT_DEBUG}},
 306         {RSP_ERROR,   601,609, -1,                  0, 0, {ACT_ABORTDIAL}},
 307         {EV_TIMEOUT,  601,609, -1,                  0, 0, {ACT_ABORTDIAL}},
 308
 309         /* dialing */
 310         {RSP_ZCTP,    650,650, -1,                 -1,-1, {ACT_DEBUG}},
 311         {RSP_ZCPN,    650,650, -1,                 -1,-1, {ACT_DEBUG}},
 312         {RSP_ZSAU,    650,650,ZSAU_CALL_DELIVERED, -1,-1, {ACT_DEBUG}}, /* some devices don't send this */
 313
 314         /* connection established  */
 315         {RSP_ZSAU,    650,650,ZSAU_ACTIVE,        800,-1, {ACT_CONNECT}}, //FIXME -> DLE1
 316         {RSP_ZSAU,    750,750,ZSAU_ACTIVE,        800,-1, {ACT_CONNECT}}, //FIXME -> DLE1
 317
 318         {EV_BC_OPEN,  800,800, -1,                800,-1, {ACT_NOTIFY_BC_UP}}, //FIXME new constate + timeout
 319
 320         /* remote hangup */
 321         {RSP_ZSAU,    650,650,ZSAU_DISCONNECT_IND,  0, 0, {ACT_REMOTEREJECT}},
 322         {RSP_ZSAU,    750,750,ZSAU_DISCONNECT_IND,  0, 0, {ACT_REMOTEHUP}},
 323         {RSP_ZSAU,    800,800,ZSAU_DISCONNECT_IND,  0, 0, {ACT_REMOTEHUP}},
 324
 325         /* hangup */
 326         {EV_HUP,       -1, -1, -1,                 -1,-1, {ACT_HUP}}, //FIXME
 327         {RSP_INIT,     -1, -1,SEQ_HUP,            401, 5, {0},             "+VLS=0\r"}, /* hang up */ //-1,-1?
 328         {RSP_OK,      401,401, -1,                402, 5},
 329         {RSP_ZVLS,    402,402,  0,                403, 5},
 330         {RSP_ZSAU,    403,403,ZSAU_DISCONNECT_REQ, -1,-1, {ACT_DEBUG}}, /* if not remote hup */
 331         //{RSP_ZSAU,    403,403,ZSAU_NULL,          401, 0, {ACT_ERROR}}, //DELETE//FIXME -> DLE0 // should we do this _before_ hanging up for base driver?
 332         {RSP_ZSAU,    403,403,ZSAU_NULL,            0, 0, {ACT_DISCONNECT}}, //FIXME -> DLE0 // should we do this _before_ hanging up for base driver?
 333         {RSP_NODEV,   401,403, -1,                  0, 0, {ACT_FAKEHUP}}, //FIXME -> DLE0 // should we do this _before_ hanging up for base driver?
 334         {RSP_ERROR,   401,401, -1,                  0, 0, {ACT_ABORTHUP}},
 335         {EV_TIMEOUT,  401,403, -1,                  0, 0, {ACT_ABORTHUP}},
 336
 337         {EV_BC_CLOSED,  0,  0, -1,                  0,-1, {ACT_NOTIFY_BC_DOWN}}, //FIXME new constate + timeout
 338
 339         /* ring */
 340         {RSP_ZBC,     700,700, -1,                 -1,-1, {0}},
 341         {RSP_ZHLC,    700,700, -1,                 -1,-1, {0}},
 342         {RSP_NMBR,    700,700, -1,                 -1,-1, {0}},
 343         {RSP_ZCPN,    700,700, -1,                 -1,-1, {0}},
 344         {RSP_ZCTP,    700,700, -1,                 -1,-1, {0}},
 345         {EV_TIMEOUT,  700,700, -1,               720,720, {ACT_ICALL}},
 346         {EV_BC_CLOSED,720,720, -1,                  0,-1, {ACT_NOTIFY_BC_DOWN}},
 347
 348         /*accept icall*/
 349         {EV_ACCEPT,    -1, -1, -1,                 -1,-1, {ACT_ACCEPT}}, //FIXME
 350         {RSP_INIT,    720,720,SEQ_ACCEPT,         721, 5, {ACT_CMD+AT_PROTO}},
 351         {RSP_OK,      721,721, -1,                722, 5, {ACT_CMD+AT_ISO}},
 352         {RSP_OK,      722,722, -1,                723, 5, {0},             "+VLS=17\r"}, /* set "Endgeraetemodus" */
 353         {RSP_OK,      723,723, -1,                724, 5, {0}},
 354         {RSP_ZVLS,    724,724, 17,                750,50, {ACT_ACCEPTED}},
 355         {RSP_ERROR,   721,729, -1,                  0, 0, {ACT_ABORTACCEPT}},
 356         {EV_TIMEOUT,  721,729, -1,                  0, 0, {ACT_ABORTACCEPT}},
 357         {RSP_ZSAU,    700,729,ZSAU_NULL,            0, 0, {ACT_ABORTACCEPT}},
 358         {RSP_ZSAU,    700,729,ZSAU_ACTIVE,          0, 0, {ACT_ABORTACCEPT}},
 359         {RSP_ZSAU,    700,729,ZSAU_DISCONNECT_IND,  0, 0, {ACT_ABORTACCEPT}},
 360
 361         {EV_TIMEOUT,  750,750, -1,                  0, 0, {ACT_CONNTIMEOUT}},
 362
 363         /* B channel closed (general case) */
 364         {EV_BC_CLOSED, -1, -1, -1,                 -1,-1, {ACT_NOTIFY_BC_DOWN}}, //FIXME
 365
 366         /* misc. */
 367         {EV_PROTO_L2,  -1, -1, -1,                 -1,-1, {ACT_PROTO_L2}}, //FIXME
 368
 369         {RSP_ZCON,     -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 370         {RSP_ZCCR,     -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 371         {RSP_ZAOC,     -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 372         {RSP_ZCSTR,    -1, -1, -1,                 -1,-1, {ACT_DEBUG}}, //FIXME
 373
 374         {RSP_ZCAU,     -1, -1, -1,                 -1,-1, {ACT_ZCAU}},
 375         {RSP_NONE,     -1, -1, -1,                 -1,-1, {ACT_DEBUG}},
 376         {RSP_ANY,      -1, -1, -1,                 -1,-1, {ACT_WARN}},
 377         {RSP_LAST}
 378 };
 379
 380
 381 static const struct resp_type_t resp_type[] =
 382 {
 383         /*{"",          RSP_EMPTY,      RT_NOTHING},*/
 384         {"OK",          RSP_OK,         RT_NOTHING},
 385         {"ERROR",       RSP_ERROR,      RT_NOTHING},
 386         {"ZSAU",        RSP_ZSAU,       RT_ZSAU},
 387         {"ZCAU",        RSP_ZCAU,       RT_ZCAU},
 388         {"RING",        RSP_RING,       RT_RING},
 389         {"ZGCI",        RSP_ZGCI,       RT_NUMBER},
 390         {"ZVLS",        RSP_ZVLS,       RT_NUMBER},
 391         {"ZCTP",        RSP_ZCTP,       RT_NUMBER},
 392         {"ZDLE",        RSP_ZDLE,       RT_NUMBER},
 393         {"ZCFGT",       RSP_ZCFGT,      RT_NUMBER},
 394         {"ZCCR",        RSP_ZCCR,       RT_NUMBER},
 395         {"ZMWI",        RSP_ZMWI,       RT_NUMBER},
 396         {"ZHLC",        RSP_ZHLC,       RT_STRING},
 397         {"ZBC",         RSP_ZBC,        RT_STRING},
 398         {"NMBR",        RSP_NMBR,       RT_STRING},
 399         {"ZCPN",        RSP_ZCPN,       RT_STRING},
 400         {"ZCON",        RSP_ZCON,       RT_STRING},
 401         {"ZAOC",        RSP_ZAOC,       RT_STRING},
 402         {"ZCSTR",       RSP_ZCSTR,      RT_STRING},
 403         {"ZCFG",        RSP_ZCFG,       RT_HEX},
 404         {"ZLOG",        RSP_ZLOG,       RT_NOTHING},
 405         {"ZABINFO",     RSP_ZABINFO,    RT_NOTHING},
 406         {"ZSMLSTCHG",   RSP_ZSMLSTCHG,  RT_NOTHING},
 407         {NULL,0,0}
 408 };
 409
 410 /*
 411  * Get integer from char-pointer
 412  */
 413 static int isdn_getnum(char *p)
 414 {
 415         int v = -1;
 416
 417         gig_dbg(DEBUG_TRANSCMD, "string: %s", p);
 418
 419         while (*p >= '0' && *p <= '9')
 420                 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p++) - '0');
 421         if (*p)
 422                 v = -1; /* invalid Character */
 423         return v;
 424 }
 425
 426 /*
 427  * Get integer from char-pointer
 428  */
 429 static int isdn_gethex(char *p)
 430 {
 431         int v = 0;
 432         int c;
 433
 434         gig_dbg(DEBUG_TRANSCMD, "string: %s", p);
 435
 436         if (!*p)
 437                 return -1;
 438
 439         do {
 440                 if (v > (INT_MAX - 15) / 16)
 441                         return -1;
 442                 c = *p;
 443                 if (c >= '0' && c <= '9')
 444                         c -= '0';
 445                 else if (c >= 'a' && c <= 'f')
 446                         c -= 'a' - 10;
 447                 else if (c >= 'A' && c <= 'F')
 448                         c -= 'A' - 10;
 449                 else
 450                         return -1;
 451                 v = v * 16 + c;
 452         } while (*++p);
 453
 454         return v;
 455 }
 456
 457 /* retrieve CID from parsed response
 458  * returns 0 if no CID, -1 if invalid CID, or CID value 1..65535
 459  */
 460 static int cid_of_response(char *s)
 461 {
 462         int cid;
 463
 464         if (s[-1] != ';')
 465                 return 0;       /* no CID separator */
 466         cid = isdn_getnum(s);
 467         if (cid < 0)
 468                 return 0;       /* CID not numeric */
 469         if (cid < 1 || cid > 65535)
 470                 return -1;      /* CID out of range */
 471         return cid;
 472         //FIXME is ;<digit>+ at end of non-CID response really impossible?
 473 }
 474
 475 /* This function will be called via task queue from the callback handler.
 476  * We received a modem response and have to handle it..
 477  */
 478 void gigaset_handle_modem_response(struct cardstate *cs)
 479 {
 480         unsigned char *argv[MAX_REC_PARAMS + 1];
 481         int params;
 482         int i, j;
 483         const struct resp_type_t *rt;
 484         int curarg;
 485         unsigned long flags;
 486         unsigned next, tail, head;
 487         struct event_t *event;
 488         int resp_code;
 489         int param_type;
 490         int abort;
 491         size_t len;
 492         int cid;
 493         int rawstring;
 494
 495         len = cs->cbytes;
 496         if (!len) {
 497                 /* ignore additional LFs/CRs (M10x config mode or cx100) */
 498                 gig_dbg(DEBUG_MCMD, "skipped EOL [%02X]", cs->respdata[len]);
 499                 return;
 500         }
 501         cs->respdata[len] = 0;
 502         gig_dbg(DEBUG_TRANSCMD, "raw string: '%s'", cs->respdata);
 503         argv[0] = cs->respdata;
 504         params = 1;
 505         if (cs->at_state.getstring) {
 506                 /* getstring only allowed without cid at the moment */
 507                 cs->at_state.getstring = 0;
 508                 rawstring = 1;
 509                 cid = 0;
 510         } else {
 511                 /* parse line */
 512                 for (i = 0; i < len; i++)
 513                         switch (cs->respdata[i]) {
 514                         case ';':
 515                         case ',':
 516                         case '=':
 517                                 if (params > MAX_REC_PARAMS) {
 518                                         dev_warn(cs->dev,
 519                                            "too many parameters in response\n");
 520                                         /* need last parameter (might be CID) */
 521                                         params--;
 522                                 }
 523                                 argv[params++] = cs->respdata + i + 1;
 524                         }
 525
 526                 rawstring = 0;
 527                 cid = params > 1 ? cid_of_response(argv[params-1]) : 0;
 528                 if (cid < 0) {
 529                         gigaset_add_event(cs, &cs->at_state, RSP_INVAL,
 530                                           NULL, 0, NULL);
 531                         return;
 532                 }
 533
 534                 for (j = 1; j < params; ++j)
 535                         argv[j][-1] = 0;
 536
 537                 gig_dbg(DEBUG_TRANSCMD, "CMD received: %s", argv[0]);
 538                 if (cid) {
 539                         --params;
 540                         gig_dbg(DEBUG_TRANSCMD, "CID: %s", argv[params]);
 541                 }
 542                 gig_dbg(DEBUG_TRANSCMD, "available params: %d", params - 1);
 543                 for (j = 1; j < params; j++)
 544                         gig_dbg(DEBUG_TRANSCMD, "param %d: %s", j, argv[j]);
 545         }
 546
 547         spin_lock_irqsave(&cs->ev_lock, flags);
 548         head = cs->ev_head;
 549         tail = cs->ev_tail;
 550
 551         abort = 1;
 552         curarg = 0;
 553         while (curarg < params) {
 554                 next = (tail + 1) % MAX_EVENTS;
 555                 if (unlikely(next == head)) {
 556                         dev_err(cs->dev, "event queue full\n");
 557                         break;
 558                 }
 559
 560                 event = cs->events + tail;
 561                 event->at_state = NULL;
 562                 event->cid = cid;
 563                 event->ptr = NULL;
 564                 event->arg = NULL;
 565                 tail = next;
 566
 567                 if (rawstring) {
 568                         resp_code = RSP_STRING;
 569                         param_type = RT_STRING;
 570                 } else {
 571                         for (rt = resp_type; rt->response; ++rt)
 572                                 if (!strcmp(argv[curarg], rt->response))
 573                                         break;
 574
 575                         if (!rt->response) {
 576                                 event->type = RSP_UNKNOWN;
 577                                 dev_warn(cs->dev,
 578                                          "unknown modem response: %s\n",
 579                                          argv[curarg]);
 580                                 break;
 581                         }
 582
 583                         resp_code = rt->resp_code;
 584                         param_type = rt->type;
 585                         ++curarg;
 586                 }
 587
 588                 event->type = resp_code;
 589
 590                 switch (param_type) {
 591                 case RT_NOTHING:
 592                         break;
 593                 case RT_RING:
 594                         if (!cid) {
 595                                 dev_err(cs->dev,
 596                                         "received RING without CID!\n");
 597                                 event->type = RSP_INVAL;
 598                                 abort = 1;
 599                         } else {
 600                                 event->cid = 0;
 601                                 event->parameter = cid;
 602                                 abort = 0;
 603                         }
 604                         break;
 605                 case RT_ZSAU:
 606                         if (curarg >= params) {
 607                                 event->parameter = ZSAU_NONE;
 608                                 break;
 609                         }
 610                         if (!strcmp(argv[curarg], "OUTGOING_CALL_PROCEEDING"))
 611                                 event->parameter = ZSAU_OUTGOING_CALL_PROCEEDING;
 612                         else if (!strcmp(argv[curarg], "CALL_DELIVERED"))
 613                                 event->parameter = ZSAU_CALL_DELIVERED;
 614                         else if (!strcmp(argv[curarg], "ACTIVE"))
 615                                 event->parameter = ZSAU_ACTIVE;
 616                         else if (!strcmp(argv[curarg], "DISCONNECT_IND"))
 617                                 event->parameter = ZSAU_DISCONNECT_IND;
 618                         else if (!strcmp(argv[curarg], "NULL"))
 619                                 event->parameter = ZSAU_NULL;
 620                         else if (!strcmp(argv[curarg], "DISCONNECT_REQ"))
 621                                 event->parameter = ZSAU_DISCONNECT_REQ;
 622                         else {
 623                                 event->parameter = ZSAU_UNKNOWN;
 624                                 dev_warn(cs->dev,
 625                                         "%s: unknown parameter %s after ZSAU\n",
 626                                          __func__, argv[curarg]);
 627                         }
 628                         ++curarg;
 629                         break;
 630                 case RT_STRING:
 631                         if (curarg < params) {
 632                                 event->ptr = kstrdup(argv[curarg], GFP_ATOMIC);
 633                                 if (!event->ptr)
 634                                         dev_err(cs->dev, "out of memory\n");
 635                                 ++curarg;
 636                         }
 637                         gig_dbg(DEBUG_CMD, "string==%s",
 638                                 event->ptr ? (char *) event->ptr : "NULL");
 639                         break;
 640                 case RT_ZCAU:
 641                         event->parameter = -1;
 642                         if (curarg + 1 < params) {
 643                                 i = isdn_gethex(argv[curarg]);
 644                                 j = isdn_gethex(argv[curarg + 1]);
 645                                 if (i >= 0 && i < 256 && j >= 0 && j < 256)
 646                                         event->parameter = (unsigned) i << 8
 647                                                            | j;
 648                                 curarg += 2;
 649                         } else
 650                                 curarg = params - 1;
 651                         break;
 652                 case RT_NUMBER:
 653                 case RT_HEX:
 654                         if (curarg < params) {
 655                                 if (param_type == RT_HEX)
 656                                         event->parameter =
 657                                                 isdn_gethex(argv[curarg]);
 658                                 else
 659                                         event->parameter =
 660                                                 isdn_getnum(argv[curarg]);
 661                                 ++curarg;
 662                         } else
 663                                 event->parameter = -1;
 664                         gig_dbg(DEBUG_CMD, "parameter==%d", event->parameter);
 665                         break;
 666                 }
 667
 668                 if (resp_code == RSP_ZDLE)
 669                         cs->dle = event->parameter;
 670
 671                 if (abort)
 672                         break;
 673         }
 674
 675         cs->ev_tail = tail;
 676         spin_unlock_irqrestore(&cs->ev_lock, flags);
 677
 678         if (curarg != params)
 679                 gig_dbg(DEBUG_ANY,
 680                         "invalid number of processed parameters: %d/%d",
 681                         curarg, params);
 682 }
 683 EXPORT_SYMBOL_GPL(gigaset_handle_modem_response);
 684
 685 /* disconnect
 686  * process closing of connection associated with given AT state structure
 687  */
 688 static void disconnect(struct at_state_t **at_state_p)
 689 {
 690         unsigned long flags;
 691         struct bc_state *bcs = (*at_state_p)->bcs;
 692         struct cardstate *cs = (*at_state_p)->cs;
 693
 694         spin_lock_irqsave(&cs->lock, flags);
 695         ++(*at_state_p)->seq_index;
 696
 697         /* revert to selected idle mode */
 698         if (!cs->cidmode) {
 699                 cs->at_state.pending_commands |= PC_UMMODE;
 700                 cs->commands_pending = 1;
 701                 gig_dbg(DEBUG_CMD, "Scheduling PC_UMMODE");
 702         }
 703         spin_unlock_irqrestore(&cs->lock, flags);
 704
 705         if (bcs) {
 706                 /* B channel assigned: invoke hardware specific handler */
 707                 cs->ops->close_bchannel(bcs);
 708         } else {
 709                 /* no B channel assigned: just deallocate */
 710                 spin_lock_irqsave(&cs->lock, flags);
 711                 list_del(&(*at_state_p)->list);
 712                 kfree(*at_state_p);
 713                 *at_state_p = NULL;
 714                 spin_unlock_irqrestore(&cs->lock, flags);
 715         }
 716 }
 717
 718 /* get_free_channel
 719  * get a free AT state structure: either one of those associated with the
 720  * B channels of the Gigaset device, or if none of those is available,
 721  * a newly allocated one with bcs=NULL
 722  * The structure should be freed by calling disconnect() after use.
 723  */
 724 static inline struct at_state_t *get_free_channel(struct cardstate *cs,
 725                                                   int cid)
 726 /* cids: >0: siemens-cid
 727           0: without cid
 728          -1: no cid assigned yet
 729 */
 730 {
 731         unsigned long flags;
 732         int i;
 733         struct at_state_t *ret;
 734
 735         for (i = 0; i < cs->channels; ++i)
 736                 if (gigaset_get_channel(cs->bcs + i)) {
 737                         ret = &cs->bcs[i].at_state;
 738                         ret->cid = cid;
 739                         return ret;
 740                 }
 741
 742         spin_lock_irqsave(&cs->lock, flags);
 743         ret = kmalloc(sizeof(struct at_state_t), GFP_ATOMIC);
 744         if (ret) {
 745                 gigaset_at_init(ret, NULL, cs, cid);
 746                 list_add(&ret->list, &cs->temp_at_states);
 747         }
 748         spin_unlock_irqrestore(&cs->lock, flags);
 749         return ret;
 750 }
 751
 752 static void init_failed(struct cardstate *cs, int mode)
 753 {
 754         int i;
 755         struct at_state_t *at_state;
 756
 757         cs->at_state.pending_commands &= ~PC_INIT;
 758         cs->mode = mode;
 759         cs->mstate = MS_UNINITIALIZED;
 760         gigaset_free_channels(cs);
 761         for (i = 0; i < cs->channels; ++i) {
 762                 at_state = &cs->bcs[i].at_state;
 763                 if (at_state->pending_commands & PC_CID) {
 764                         at_state->pending_commands &= ~PC_CID;
 765                         at_state->pending_commands |= PC_NOCID;
 766                         cs->commands_pending = 1;
 767                 }
 768         }
 769 }
 770
 771 static void schedule_init(struct cardstate *cs, int state)
 772 {
 773         if (cs->at_state.pending_commands & PC_INIT) {
 774                 gig_dbg(DEBUG_CMD, "not scheduling PC_INIT again");
 775                 return;
 776         }
 777         cs->mstate = state;
 778         cs->mode = M_UNKNOWN;
 779         gigaset_block_channels(cs);
 780         cs->at_state.pending_commands |= PC_INIT;
 781         cs->commands_pending = 1;
 782         gig_dbg(DEBUG_CMD, "Scheduling PC_INIT");
 783 }
 784
 785 /* Add "AT" to a command, add the cid, dle encode it, send the result to the
 786    hardware. */
 787 static void send_command(struct cardstate *cs, const char *cmd, int cid,
 788                          int dle, gfp_t kmallocflags)
 789 {
 790         size_t cmdlen, buflen;
 791         char *cmdpos, *cmdbuf, *cmdtail;
 792
 793         cmdlen = strlen(cmd);
 794         buflen = 11 + cmdlen;
 795         if (unlikely(buflen <= cmdlen)) {
 796                 dev_err(cs->dev, "integer overflow in buflen\n");
 797                 return;
 798         }
 799
 800         cmdbuf = kmalloc(buflen, kmallocflags);
 801         if (unlikely(!cmdbuf)) {
 802                 dev_err(cs->dev, "out of memory\n");
 803                 return;
 804         }
 805
 806         cmdpos = cmdbuf + 9;
 807         cmdtail = cmdpos + cmdlen;
 808         memcpy(cmdpos, cmd, cmdlen);
 809
 810         if (cid > 0 && cid <= 65535) {
 811                 do {
 812                         *--cmdpos = '0' + cid % 10;
 813                         cid /= 10;
 814                         ++cmdlen;
 815                 } while (cid);
 816         }
 817
 818         cmdlen += 2;
 819         *--cmdpos = 'T';
 820         *--cmdpos = 'A';
 821
 822         if (dle) {
 823                 cmdlen += 4;
 824                 *--cmdpos = '(';
 825                 *--cmdpos = 0x10;
 826                 *cmdtail++ = 0x10;
 827                 *cmdtail++ = ')';
 828         }
 829
 830         cs->ops->write_cmd(cs, cmdpos, cmdlen, NULL);
 831         kfree(cmdbuf);
 832 }
 833
 834 static struct at_state_t *at_state_from_cid(struct cardstate *cs, int cid)
 835 {
 836         struct at_state_t *at_state;
 837         int i;
 838         unsigned long flags;
 839
 840         if (cid == 0)
 841                 return &cs->at_state;
 842
 843         for (i = 0; i < cs->channels; ++i)
 844                 if (cid == cs->bcs[i].at_state.cid)
 845                         return &cs->bcs[i].at_state;
 846
 847         spin_lock_irqsave(&cs->lock, flags);
 848
 849         list_for_each_entry(at_state, &cs->temp_at_states, list)
 850                 if (cid == at_state->cid) {
 851                         spin_unlock_irqrestore(&cs->lock, flags);
 852                         return at_state;
 853                 }
 854
 855         spin_unlock_irqrestore(&cs->lock, flags);
 856
 857         return NULL;
 858 }
 859
 860 static void bchannel_down(struct bc_state *bcs)
 861 {
 862         if (bcs->chstate & CHS_B_UP) {
 863                 bcs->chstate &= ~CHS_B_UP;
 864                 gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BHUP);
 865         }
 866
 867         if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
 868                 bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
 869                 gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DHUP);
 870         }
 871
 872         gigaset_free_channel(bcs);
 873
 874         gigaset_bcs_reinit(bcs);
 875 }
 876
 877 static void bchannel_up(struct bc_state *bcs)
 878 {
 879         if (!(bcs->chstate & CHS_D_UP)) {
 880                 dev_notice(bcs->cs->dev, "%s: D channel not up\n", __func__);
 881                 bcs->chstate |= CHS_D_UP;
 882                 gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
 883         }
 884
 885         if (bcs->chstate & CHS_B_UP) {
 886                 dev_notice(bcs->cs->dev, "%s: B channel already up\n",
 887                            __func__);
 888                 return;
 889         }
 890
 891         bcs->chstate |= CHS_B_UP;
 892         gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BCONN);
 893 }
 894
 895 static void start_dial(struct at_state_t *at_state, void *data, unsigned seq_index)
 896 {
 897         struct bc_state *bcs = at_state->bcs;
 898         struct cardstate *cs = at_state->cs;
 899         int retval;
 900         unsigned long flags;
 901
 902         bcs->chstate |= CHS_NOTIFY_LL;
 903
 904         spin_lock_irqsave(&cs->lock, flags);
 905         if (at_state->seq_index != seq_index) {
 906                 spin_unlock_irqrestore(&cs->lock, flags);
 907                 goto error;
 908         }
 909         spin_unlock_irqrestore(&cs->lock, flags);
 910
 911         retval = gigaset_isdn_setup_dial(at_state, data);
 912         if (retval != 0)
 913                 goto error;
 914
 915
 916         at_state->pending_commands |= PC_CID;
 917         gig_dbg(DEBUG_CMD, "Scheduling PC_CID");
 918         cs->commands_pending = 1;
 919         return;
 920
 921 error:
 922         at_state->pending_commands |= PC_NOCID;
 923         gig_dbg(DEBUG_CMD, "Scheduling PC_NOCID");
 924         cs->commands_pending = 1;
 925         return;
 926 }
 927
 928 static void start_accept(struct at_state_t *at_state)
 929 {
 930         struct cardstate *cs = at_state->cs;
 931         int retval;
 932
 933         retval = gigaset_isdn_setup_accept(at_state);
 934
 935         if (retval == 0) {
 936                 at_state->pending_commands |= PC_ACCEPT;
 937                 gig_dbg(DEBUG_CMD, "Scheduling PC_ACCEPT");
 938                 cs->commands_pending = 1;
 939         } else {
 940                 /* error reset */
 941                 at_state->pending_commands |= PC_HUP;
 942                 gig_dbg(DEBUG_CMD, "Scheduling PC_HUP");
 943                 cs->commands_pending = 1;
 944         }
 945 }
 946
 947 static void do_start(struct cardstate *cs)
 948 {
 949         gigaset_free_channels(cs);
 950
 951         if (cs->mstate != MS_LOCKED)
 952                 schedule_init(cs, MS_INIT);
 953
 954         cs->isdn_up = 1;
 955         gigaset_i4l_cmd(cs, ISDN_STAT_RUN);
 956                                         // FIXME: not in locked mode
 957                                         // FIXME 2: only after init sequence
 958
 959         cs->waiting = 0;
 960         wake_up(&cs->waitqueue);
 961 }
 962
 963 static void finish_shutdown(struct cardstate *cs)
 964 {
 965         if (cs->mstate != MS_LOCKED) {
 966                 cs->mstate = MS_UNINITIALIZED;
 967                 cs->mode = M_UNKNOWN;
 968         }
 969
 970         /* Tell the LL that the device is not available .. */
 971         if (cs->isdn_up) {
 972                 cs->isdn_up = 0;
 973                 gigaset_i4l_cmd(cs, ISDN_STAT_STOP);
 974         }
 975
 976         /* The rest is done by cleanup_cs () in user mode. */
 977
 978         cs->cmd_result = -ENODEV;
 979         cs->waiting = 0;
 980         wake_up(&cs->waitqueue);
 981 }
 982
 983 static void do_shutdown(struct cardstate *cs)
 984 {
 985         gigaset_block_channels(cs);
 986
 987         if (cs->mstate == MS_READY) {
 988                 cs->mstate = MS_SHUTDOWN;
 989                 cs->at_state.pending_commands |= PC_SHUTDOWN;
 990                 cs->commands_pending = 1;
 991                 gig_dbg(DEBUG_CMD, "Scheduling PC_SHUTDOWN");
 992         } else
 993                 finish_shutdown(cs);
 994 }
 995
 996 static void do_stop(struct cardstate *cs)
 997 {
 998         unsigned long flags;
 999
1000         spin_lock_irqsave(&cs->lock, flags);
1001         cs->connected = 0;
1002         spin_unlock_irqrestore(&cs->lock, flags);
1003
1004         do_shutdown(cs);
1005 }
1006
1007 /* Entering cid mode or getting a cid failed:
1008  * try to initialize the device and try again.
1009  *
1010  * channel >= 0: getting cid for the channel failed
1011  * channel < 0:  entering cid mode failed
1012  *
1013  * returns 0 on failure
1014  */
1015 static int reinit_and_retry(struct cardstate *cs, int channel)
1016 {
1017         int i;
1018
1019         if (--cs->retry_count <= 0)
1020                 return 0;
1021
1022         for (i = 0; i < cs->channels; ++i)
1023                 if (cs->bcs[i].at_state.cid > 0)
1024                         return 0;
1025
1026         if (channel < 0)
1027                 dev_warn(cs->dev,
1028                     "Could not enter cid mode. Reinit device and try again.\n");
1029         else {
1030                 dev_warn(cs->dev,
1031                     "Could not get a call id. Reinit device and try again.\n");
1032                 cs->bcs[channel].at_state.pending_commands |= PC_CID;
1033         }
1034         schedule_init(cs, MS_INIT);
1035         return 1;
1036 }
1037
1038 static int at_state_invalid(struct cardstate *cs,
1039                             struct at_state_t *test_ptr)
1040 {
1041         unsigned long flags;
1042         unsigned channel;
1043         struct at_state_t *at_state;
1044         int retval = 0;
1045
1046         spin_lock_irqsave(&cs->lock, flags);
1047
1048         if (test_ptr == &cs->at_state)
1049                 goto exit;
1050
1051         list_for_each_entry(at_state, &cs->temp_at_states, list)
1052                 if (at_state == test_ptr)
1053                         goto exit;
1054
1055         for (channel = 0; channel < cs->channels; ++channel)
1056                 if (&cs->bcs[channel].at_state == test_ptr)
1057                         goto exit;
1058
1059         retval = 1;
1060 exit:
1061         spin_unlock_irqrestore(&cs->lock, flags);
1062         return retval;
1063 }
1064
1065 static void handle_icall(struct cardstate *cs, struct bc_state *bcs,
1066                          struct at_state_t **p_at_state)
1067 {
1068         int retval;
1069         struct at_state_t *at_state = *p_at_state;
1070
1071         retval = gigaset_isdn_icall(at_state);
1072         switch (retval) {
1073         case ICALL_ACCEPT:
1074                 break;
1075         default:
1076                 dev_err(cs->dev, "internal error: disposition=%d\n", retval);
1077                 /* --v-- fall through --v-- */
1078         case ICALL_IGNORE:
1079         case ICALL_REJECT:
1080                 /* hang up actively
1081                  * Device doc says that would reject the call.
1082                  * In fact it doesn't.
1083                  */
1084                 at_state->pending_commands |= PC_HUP;
1085                 cs->commands_pending = 1;
1086                 break;
1087         }
1088 }
1089
1090 static int do_lock(struct cardstate *cs)
1091 {
1092         int mode;
1093         int i;
1094
1095         switch (cs->mstate) {
1096         case MS_UNINITIALIZED:
1097         case MS_READY:
1098                 if (cs->cur_at_seq || !list_empty(&cs->temp_at_states) ||
1099                     cs->at_state.pending_commands)
1100                         return -EBUSY;
1101
1102                 for (i = 0; i < cs->channels; ++i)
1103                         if (cs->bcs[i].at_state.pending_commands)
1104                                 return -EBUSY;
1105
1106                 if (!gigaset_get_channels(cs))
1107                         return -EBUSY;
1108
1109                 break;
1110         case MS_LOCKED:
1111                 //retval = -EACCES;
1112                 break;
1113         default:
1114                 return -EBUSY;
1115         }
1116
1117         mode = cs->mode;
1118         cs->mstate = MS_LOCKED;
1119         cs->mode = M_UNKNOWN;
1120
1121         return mode;
1122 }
1123
1124 static int do_unlock(struct cardstate *cs)
1125 {
1126         if (cs->mstate != MS_LOCKED)
1127                 return -EINVAL;
1128
1129         cs->mstate = MS_UNINITIALIZED;
1130         cs->mode = M_UNKNOWN;
1131         gigaset_free_channels(cs);
1132         if (cs->connected)
1133                 schedule_init(cs, MS_INIT);
1134
1135         return 0;
1136 }
1137
1138 static void do_action(int action, struct cardstate *cs,
1139                       struct bc_state *bcs,
1140                       struct at_state_t **p_at_state, char **pp_command,
1141                       int *p_genresp, int *p_resp_code,
1142                       struct event_t *ev)
1143 {
1144         struct at_state_t *at_state = *p_at_state;
1145         struct at_state_t *at_state2;
1146         unsigned long flags;
1147
1148         int channel;
1149
1150         unsigned char *s, *e;
1151         int i;
1152         unsigned long val;
1153
1154         switch (action) {
1155         case ACT_NOTHING:
1156                 break;
1157         case ACT_TIMEOUT:
1158                 at_state->waiting = 1;
1159                 break;
1160         case ACT_INIT:
1161                 cs->at_state.pending_commands &= ~PC_INIT;
1162                 cs->cur_at_seq = SEQ_NONE;
1163                 cs->mode = M_UNIMODEM;
1164                 spin_lock_irqsave(&cs->lock, flags);
1165                 if (!cs->cidmode) {
1166                         spin_unlock_irqrestore(&cs->lock, flags);
1167                         gigaset_free_channels(cs);
1168                         cs->mstate = MS_READY;
1169                         break;
1170                 }
1171                 spin_unlock_irqrestore(&cs->lock, flags);
1172                 cs->at_state.pending_commands |= PC_CIDMODE;
1173                 cs->commands_pending = 1;
1174                 gig_dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
1175                 break;
1176         case ACT_FAILINIT:
1177                 dev_warn(cs->dev, "Could not initialize the device.\n");
1178                 cs->dle = 0;
1179                 init_failed(cs, M_UNKNOWN);
1180                 cs->cur_at_seq = SEQ_NONE;
1181                 break;
1182         case ACT_CONFIGMODE:
1183                 init_failed(cs, M_CONFIG);
1184                 cs->cur_at_seq = SEQ_NONE;
1185                 break;
1186         case ACT_SETDLE1:
1187                 cs->dle = 1;
1188                 /* cs->inbuf[0].inputstate |= INS_command | INS_DLE_command; */
1189                 cs->inbuf[0].inputstate &=
1190                         ~(INS_command | INS_DLE_command);
1191                 break;
1192         case ACT_SETDLE0:
1193                 cs->dle = 0;
1194                 cs->inbuf[0].inputstate =
1195                         (cs->inbuf[0].inputstate & ~INS_DLE_command)
1196                         | INS_command;
1197                 break;
1198         case ACT_CMODESET:
1199                 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1200                         gigaset_free_channels(cs);
1201                         cs->mstate = MS_READY;
1202                 }
1203                 cs->mode = M_CID;
1204                 cs->cur_at_seq = SEQ_NONE;
1205                 break;
1206         case ACT_UMODESET:
1207                 cs->mode = M_UNIMODEM;
1208                 cs->cur_at_seq = SEQ_NONE;
1209                 break;
1210         case ACT_FAILCMODE:
1211                 cs->cur_at_seq = SEQ_NONE;
1212                 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1213                         init_failed(cs, M_UNKNOWN);
1214                         break;
1215                 }
1216                 if (!reinit_and_retry(cs, -1))
1217                         schedule_init(cs, MS_RECOVER);
1218                 break;
1219         case ACT_FAILUMODE:
1220                 cs->cur_at_seq = SEQ_NONE;
1221                 schedule_init(cs, MS_RECOVER);
1222                 break;
1223         case ACT_HUPMODEM:
1224                 /* send "+++" (hangup in unimodem mode) */
1225                 if (cs->connected)
1226                         cs->ops->write_cmd(cs, "+++", 3, NULL);
1227                 break;
1228         case ACT_RING:
1229                 /* get fresh AT state structure for new CID */
1230                 at_state2 = get_free_channel(cs, ev->parameter);
1231                 if (!at_state2) {
1232                         dev_warn(cs->dev,
1233                         "RING ignored: could not allocate channel structure\n");
1234                         break;
1235                 }
1236
1237                 /* initialize AT state structure
1238                  * note that bcs may be NULL if no B channel is free
1239                  */
1240                 at_state2->ConState = 700;
1241                 kfree(at_state2->str_var[STR_NMBR]);
1242                 at_state2->str_var[STR_NMBR] = NULL;
1243                 kfree(at_state2->str_var[STR_ZCPN]);
1244                 at_state2->str_var[STR_ZCPN] = NULL;
1245                 kfree(at_state2->str_var[STR_ZBC]);
1246                 at_state2->str_var[STR_ZBC] = NULL;
1247                 kfree(at_state2->str_var[STR_ZHLC]);
1248                 at_state2->str_var[STR_ZHLC] = NULL;
1249                 at_state2->int_var[VAR_ZCTP] = -1;
1250
1251                 spin_lock_irqsave(&cs->lock, flags);
1252                 at_state2->timer_expires = RING_TIMEOUT;
1253                 at_state2->timer_active = 1;
1254                 spin_unlock_irqrestore(&cs->lock, flags);
1255                 break;
1256         case ACT_ICALL:
1257                 handle_icall(cs, bcs, p_at_state);
1258                 break;
1259         case ACT_FAILSDOWN:
1260                 dev_warn(cs->dev, "Could not shut down the device.\n");
1261                 /* fall through */
1262         case ACT_FAKESDOWN:
1263         case ACT_SDOWN:
1264                 cs->cur_at_seq = SEQ_NONE;
1265                 finish_shutdown(cs);
1266                 break;
1267         case ACT_CONNECT:
1268                 if (cs->onechannel) {
1269                         at_state->pending_commands |= PC_DLE1;
1270                         cs->commands_pending = 1;
1271                         break;
1272                 }
1273                 bcs->chstate |= CHS_D_UP;
1274                 gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
1275                 cs->ops->init_bchannel(bcs);
1276                 break;
1277         case ACT_DLE1:
1278                 cs->cur_at_seq = SEQ_NONE;
1279                 bcs = cs->bcs + cs->curchannel;
1280
1281                 bcs->chstate |= CHS_D_UP;
1282                 gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
1283                 cs->ops->init_bchannel(bcs);
1284                 break;
1285         case ACT_FAKEHUP:
1286                 at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
1287                 /* fall through */
1288         case ACT_DISCONNECT:
1289                 cs->cur_at_seq = SEQ_NONE;
1290                 at_state->cid = -1;
1291                 if (bcs && cs->onechannel && cs->dle) {
1292                         /* Check for other open channels not needed:
1293                          * DLE only used for M10x with one B channel.
1294                          */
1295                         at_state->pending_commands |= PC_DLE0;
1296                         cs->commands_pending = 1;
1297                 } else
1298                         disconnect(p_at_state);
1299                 break;
1300         case ACT_FAKEDLE0:
1301                 at_state->int_var[VAR_ZDLE] = 0;
1302                 cs->dle = 0;
1303                 /* fall through */
1304         case ACT_DLE0:
1305                 cs->cur_at_seq = SEQ_NONE;
1306                 at_state2 = &cs->bcs[cs->curchannel].at_state;
1307                 disconnect(&at_state2);
1308                 break;
1309         case ACT_ABORTHUP:
1310                 cs->cur_at_seq = SEQ_NONE;
1311                 dev_warn(cs->dev, "Could not hang up.\n");
1312                 at_state->cid = -1;
1313                 if (bcs && cs->onechannel)
1314                         at_state->pending_commands |= PC_DLE0;
1315                 else
1316                         disconnect(p_at_state);
1317                 schedule_init(cs, MS_RECOVER);
1318                 break;
1319         case ACT_FAILDLE0:
1320                 cs->cur_at_seq = SEQ_NONE;
1321                 dev_warn(cs->dev, "Could not leave DLE mode.\n");
1322                 at_state2 = &cs->bcs[cs->curchannel].at_state;
1323                 disconnect(&at_state2);
1324                 schedule_init(cs, MS_RECOVER);
1325                 break;
1326         case ACT_FAILDLE1:
1327                 cs->cur_at_seq = SEQ_NONE;
1328                 dev_warn(cs->dev,
1329                          "Could not enter DLE mode. Trying to hang up.\n");
1330                 channel = cs->curchannel;
1331                 cs->bcs[channel].at_state.pending_commands |= PC_HUP;
1332                 cs->commands_pending = 1;
1333                 break;
1334
1335         case ACT_CID: /* got cid; start dialing */
1336                 cs->cur_at_seq = SEQ_NONE;
1337                 channel = cs->curchannel;
1338                 if (ev->parameter > 0 && ev->parameter <= 65535) {
1339                         cs->bcs[channel].at_state.cid = ev->parameter;
1340                         cs->bcs[channel].at_state.pending_commands |=
1341                                 PC_DIAL;
1342                         cs->commands_pending = 1;
1343                         break;
1344                 }
1345                 /* fall through */
1346         case ACT_FAILCID:
1347                 cs->cur_at_seq = SEQ_NONE;
1348                 channel = cs->curchannel;
1349                 if (!reinit_and_retry(cs, channel)) {
1350                         dev_warn(cs->dev,
1351                                  "Could not get a call ID. Cannot dial.\n");
1352                         at_state2 = &cs->bcs[channel].at_state;
1353                         disconnect(&at_state2);
1354                 }
1355                 break;
1356         case ACT_ABORTCID:
1357                 cs->cur_at_seq = SEQ_NONE;
1358                 at_state2 = &cs->bcs[cs->curchannel].at_state;
1359                 disconnect(&at_state2);
1360                 break;
1361
1362         case ACT_DIALING:
1363         case ACT_ACCEPTED:
1364                 cs->cur_at_seq = SEQ_NONE;
1365                 break;
1366
1367         case ACT_ABORTACCEPT:   /* hangup/error/timeout during ICALL processing */
1368                 disconnect(p_at_state);
1369                 break;
1370
1371         case ACT_ABORTDIAL:     /* error/timeout during dial preparation */
1372                 cs->cur_at_seq = SEQ_NONE;
1373                 at_state->pending_commands |= PC_HUP;
1374                 cs->commands_pending = 1;
1375                 break;
1376
1377         case ACT_REMOTEREJECT:  /* DISCONNECT_IND after dialling */
1378         case ACT_CONNTIMEOUT:   /* timeout waiting for ZSAU=ACTIVE */
1379         case ACT_REMOTEHUP:     /* DISCONNECT_IND with established connection */
1380                 at_state->pending_commands |= PC_HUP;
1381                 cs->commands_pending = 1;
1382                 break;
1383         case ACT_GETSTRING: /* warning: RING, ZDLE, ...
1384                                are not handled properly anymore */
1385                 at_state->getstring = 1;
1386                 break;
1387         case ACT_SETVER:
1388                 if (!ev->ptr) {
1389                         *p_genresp = 1;
1390                         *p_resp_code = RSP_ERROR;
1391                         break;
1392                 }
1393                 s = ev->ptr;
1394
1395                 if (!strcmp(s, "OK")) {
1396                         *p_genresp = 1;
1397                         *p_resp_code = RSP_ERROR;
1398                         break;
1399                 }
1400
1401                 for (i = 0; i < 4; ++i) {
1402                         val = simple_strtoul(s, (char **) &e, 10);
1403                         if (val > INT_MAX || e == s)
1404                                 break;
1405                         if (i == 3) {
1406                                 if (*e)
1407                                         break;
1408                         } else if (*e != '.')
1409                                 break;
1410                         else
1411                                 s = e + 1;
1412                         cs->fwver[i] = val;
1413                 }
1414                 if (i != 4) {
1415                         *p_genresp = 1;
1416                         *p_resp_code = RSP_ERROR;
1417                         break;
1418                 }
1419                 /*at_state->getstring = 1;*/
1420                 cs->gotfwver = 0;
1421                 break;
1422         case ACT_GOTVER:
1423                 if (cs->gotfwver == 0) {
1424                         cs->gotfwver = 1;
1425                         gig_dbg(DEBUG_ANY,
1426                                 "firmware version %02d.%03d.%02d.%02d",
1427                                 cs->fwver[0], cs->fwver[1],
1428                                 cs->fwver[2], cs->fwver[3]);
1429                         break;
1430                 }
1431                 /* fall through */
1432         case ACT_FAILVER:
1433                 cs->gotfwver = -1;
1434                 dev_err(cs->dev, "could not read firmware version.\n");
1435                 break;
1436 #ifdef CONFIG_GIGASET_DEBUG
1437         case ACT_ERROR:
1438                 *p_genresp = 1;
1439                 *p_resp_code = RSP_ERROR;
1440                 break;
1441         case ACT_TEST:
1442                 {
1443                         static int count = 3; //2; //1;
1444                         *p_genresp = 1;
1445                         *p_resp_code = count ? RSP_ERROR : RSP_OK;
1446                         if (count > 0)
1447                                 --count;
1448                 }
1449                 break;
1450 #endif
1451         case ACT_DEBUG:
1452                 gig_dbg(DEBUG_ANY, "%s: resp_code %d in ConState %d",
1453                         __func__, ev->type, at_state->ConState);
1454                 break;
1455         case ACT_WARN:
1456                 dev_warn(cs->dev, "%s: resp_code %d in ConState %d!\n",
1457                          __func__, ev->type, at_state->ConState);
1458                 break;
1459         case ACT_ZCAU:
1460                 dev_warn(cs->dev, "cause code %04x in connection state %d.\n",
1461                          ev->parameter, at_state->ConState);
1462                 break;
1463
1464         /* events from the LL */
1465         case ACT_DIAL:
1466                 start_dial(at_state, ev->ptr, ev->parameter);
1467                 break;
1468         case ACT_ACCEPT:
1469                 start_accept(at_state);
1470                 break;
1471         case ACT_PROTO_L2:
1472                 gig_dbg(DEBUG_CMD, "set protocol to %u",
1473                         (unsigned) ev->parameter);
1474                 at_state->bcs->proto2 = ev->parameter;
1475                 break;
1476         case ACT_HUP:
1477                 at_state->pending_commands |= PC_HUP;
1478                 cs->commands_pending = 1;
1479                 gig_dbg(DEBUG_CMD, "Scheduling PC_HUP");
1480                 break;
1481
1482         /* hotplug events */
1483         case ACT_STOP:
1484                 do_stop(cs);
1485                 break;
1486         case ACT_START:
1487                 do_start(cs);
1488                 break;
1489
1490         /* events from the interface */ // FIXME without ACT_xxxx?
1491         case ACT_IF_LOCK:
1492                 cs->cmd_result = ev->parameter ? do_lock(cs) : do_unlock(cs);
1493                 cs->waiting = 0;
1494                 wake_up(&cs->waitqueue);
1495                 break;
1496         case ACT_IF_VER:
1497                 if (ev->parameter != 0)
1498                         cs->cmd_result = -EINVAL;
1499                 else if (cs->gotfwver != 1) {
1500                         cs->cmd_result = -ENOENT;
1501                 } else {
1502                         memcpy(ev->arg, cs->fwver, sizeof cs->fwver);
1503                         cs->cmd_result = 0;
1504                 }
1505                 cs->waiting = 0;
1506                 wake_up(&cs->waitqueue);
1507                 break;
1508
1509         /* events from the proc file system */ // FIXME without ACT_xxxx?
1510         case ACT_PROC_CIDMODE:
1511                 spin_lock_irqsave(&cs->lock, flags);
1512                 if (ev->parameter != cs->cidmode) {
1513                         cs->cidmode = ev->parameter;
1514                         if (ev->parameter) {
1515                                 cs->at_state.pending_commands |= PC_CIDMODE;
1516                                 gig_dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
1517                         } else {
1518                                 cs->at_state.pending_commands |= PC_UMMODE;
1519                                 gig_dbg(DEBUG_CMD, "Scheduling PC_UMMODE");
1520                         }
1521                         cs->commands_pending = 1;
1522                 }
1523                 spin_unlock_irqrestore(&cs->lock, flags);
1524                 cs->waiting = 0;
1525                 wake_up(&cs->waitqueue);
1526                 break;
1527
1528         /* events from the hardware drivers */
1529         case ACT_NOTIFY_BC_DOWN:
1530                 bchannel_down(bcs);
1531                 break;
1532         case ACT_NOTIFY_BC_UP:
1533                 bchannel_up(bcs);
1534                 break;
1535         case ACT_SHUTDOWN:
1536                 do_shutdown(cs);
1537                 break;
1538
1539
1540         default:
1541                 if (action >= ACT_CMD && action < ACT_CMD + AT_NUM) {
1542                         *pp_command = at_state->bcs->commands[action - ACT_CMD];
1543                         if (!*pp_command) {
1544                                 *p_genresp = 1;
1545                                 *p_resp_code = RSP_NULL;
1546                         }
1547                 } else
1548                         dev_err(cs->dev, "%s: action==%d!\n", __func__, action);
1549         }
1550 }
1551
1552 /* State machine to do the calling and hangup procedure */
1553 static void process_event(struct cardstate *cs, struct event_t *ev)
1554 {
1555         struct bc_state *bcs;
1556         char *p_command = NULL;
1557         struct reply_t *rep;
1558         int rcode;
1559         int genresp = 0;
1560         int resp_code = RSP_ERROR;
1561         int sendcid;
1562         struct at_state_t *at_state;
1563         int index;
1564         int curact;
1565         unsigned long flags;
1566
1567         if (ev->cid >= 0) {
1568                 at_state = at_state_from_cid(cs, ev->cid);
1569                 if (!at_state) {
1570                         gigaset_add_event(cs, &cs->at_state, RSP_WRONG_CID,
1571                                           NULL, 0, NULL);
1572                         return;
1573                 }
1574         } else {
1575                 at_state = ev->at_state;
1576                 if (at_state_invalid(cs, at_state)) {
1577                         gig_dbg(DEBUG_ANY, "event for invalid at_state %p",
1578                                 at_state);
1579                         return;
1580                 }
1581         }
1582
1583         gig_dbg(DEBUG_CMD, "connection state %d, event %d",
1584                 at_state->ConState, ev->type);
1585
1586         bcs = at_state->bcs;
1587         sendcid = at_state->cid;
1588
1589         /* Setting the pointer to the dial array */
1590         rep = at_state->replystruct;
1591
1592         spin_lock_irqsave(&cs->lock, flags);
1593         if (ev->type == EV_TIMEOUT) {
1594                 if (ev->parameter != at_state->timer_index
1595                     || !at_state->timer_active) {
1596                         ev->type = RSP_NONE; /* old timeout */
1597                         gig_dbg(DEBUG_ANY, "old timeout");
1598                 } else if (!at_state->waiting)
1599                         gig_dbg(DEBUG_ANY, "timeout occurred");
1600                 else
1601                         gig_dbg(DEBUG_ANY, "stopped waiting");
1602         }
1603         spin_unlock_irqrestore(&cs->lock, flags);
1604
1605         /* if the response belongs to a variable in at_state->int_var[VAR_XXXX]
1606            or at_state->str_var[STR_XXXX], set it */
1607         if (ev->type >= RSP_VAR && ev->type < RSP_VAR + VAR_NUM) {
1608                 index = ev->type - RSP_VAR;
1609                 at_state->int_var[index] = ev->parameter;
1610         } else if (ev->type >= RSP_STR && ev->type < RSP_STR + STR_NUM) {
1611                 index = ev->type - RSP_STR;
1612                 kfree(at_state->str_var[index]);
1613                 at_state->str_var[index] = ev->ptr;
1614                 ev->ptr = NULL; /* prevent process_events() from
1615                                    deallocating ptr */
1616         }
1617
1618         if (ev->type == EV_TIMEOUT || ev->type == RSP_STRING)
1619                 at_state->getstring = 0;
1620
1621         /* Search row in dial array which matches modem response and current
1622            constate */
1623         for (;; rep++) {
1624                 rcode = rep->resp_code;
1625                 if (rcode == RSP_LAST) {
1626                         /* found nothing...*/
1627                         dev_warn(cs->dev, "%s: rcode=RSP_LAST: "
1628                                         "resp_code %d in ConState %d!\n",
1629                                  __func__, ev->type, at_state->ConState);
1630                         return;
1631                 }
1632                 if ((rcode == RSP_ANY || rcode == ev->type)
1633                   && ((int) at_state->ConState >= rep->min_ConState)
1634                   && (rep->max_ConState < 0
1635                       || (int) at_state->ConState <= rep->max_ConState)
1636                   && (rep->parameter < 0 || rep->parameter == ev->parameter))
1637                         break;
1638         }
1639
1640         p_command = rep->command;
1641
1642         at_state->waiting = 0;
1643         for (curact = 0; curact < MAXACT; ++curact) {
1644                 /* The row tells us what we should do  ..
1645                  */
1646                 do_action(rep->action[curact], cs, bcs, &at_state, &p_command, &genresp, &resp_code, ev);
1647                 if (!at_state)
1648                         break; /* may be freed after disconnect */
1649         }
1650
1651         if (at_state) {
1652                 /* Jump to the next con-state regarding the array */
1653                 if (rep->new_ConState >= 0)
1654                         at_state->ConState = rep->new_ConState;
1655
1656                 if (genresp) {
1657                         spin_lock_irqsave(&cs->lock, flags);
1658                         at_state->timer_expires = 0; //FIXME
1659                         at_state->timer_active = 0; //FIXME
1660                         spin_unlock_irqrestore(&cs->lock, flags);
1661                         gigaset_add_event(cs, at_state, resp_code, NULL, 0, NULL);
1662                 } else {
1663                         /* Send command to modem if not NULL... */
1664                         if (p_command/*rep->command*/) {
1665                                 if (cs->connected)
1666                                         send_command(cs, p_command,
1667                                                      sendcid, cs->dle,
1668                                                      GFP_ATOMIC);
1669                                 else
1670                                         gigaset_add_event(cs, at_state,
1671                                                           RSP_NODEV,
1672                                                           NULL, 0, NULL);
1673                         }
1674
1675                         spin_lock_irqsave(&cs->lock, flags);
1676                         if (!rep->timeout) {
1677                                 at_state->timer_expires = 0;
1678                                 at_state->timer_active = 0;
1679                         } else if (rep->timeout > 0) { /* new timeout */
1680                                 at_state->timer_expires = rep->timeout * 10;
1681                                 at_state->timer_active = 1;
1682                                 ++at_state->timer_index;
1683                         }
1684                         spin_unlock_irqrestore(&cs->lock, flags);
1685                 }
1686         }
1687 }
1688
1689 static void schedule_sequence(struct cardstate *cs,
1690                               struct at_state_t *at_state, int sequence)
1691 {
1692         cs->cur_at_seq = sequence;
1693         gigaset_add_event(cs, at_state, RSP_INIT, NULL, sequence, NULL);
1694 }
1695
1696 static void process_command_flags(struct cardstate *cs)
1697 {
1698         struct at_state_t *at_state = NULL;
1699         struct bc_state *bcs;
1700         int i;
1701         int sequence;
1702         unsigned long flags;
1703
1704         cs->commands_pending = 0;
1705
1706         if (cs->cur_at_seq) {
1707                 gig_dbg(DEBUG_CMD, "not searching scheduled commands: busy");
1708                 return;
1709         }
1710
1711         gig_dbg(DEBUG_CMD, "searching scheduled commands");
1712
1713         sequence = SEQ_NONE;
1714
1715         /* clear pending_commands and hangup channels on shutdown */
1716         if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1717                 cs->at_state.pending_commands &= ~PC_CIDMODE;
1718                 for (i = 0; i < cs->channels; ++i) {
1719                         bcs = cs->bcs + i;
1720                         at_state = &bcs->at_state;
1721                         at_state->pending_commands &=
1722                                 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1723                         if (at_state->cid > 0)
1724                                 at_state->pending_commands |= PC_HUP;
1725                         if (at_state->pending_commands & PC_CID) {
1726                                 at_state->pending_commands |= PC_NOCID;
1727                                 at_state->pending_commands &= ~PC_CID;
1728                         }
1729                 }
1730         }
1731
1732         /* clear pending_commands and hangup channels on reset */
1733         if (cs->at_state.pending_commands & PC_INIT) {
1734                 cs->at_state.pending_commands &= ~PC_CIDMODE;
1735                 for (i = 0; i < cs->channels; ++i) {
1736                         bcs = cs->bcs + i;
1737                         at_state = &bcs->at_state;
1738                         at_state->pending_commands &=
1739                                 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1740                         if (at_state->cid > 0)
1741                                 at_state->pending_commands |= PC_HUP;
1742                         if (cs->mstate == MS_RECOVER) {
1743                                 if (at_state->pending_commands & PC_CID) {
1744                                         at_state->pending_commands |= PC_NOCID;
1745                                         at_state->pending_commands &= ~PC_CID;
1746                                 }
1747                         }
1748                 }
1749         }
1750
1751         /* only switch back to unimodem mode, if no commands are pending and no channels are up */
1752         spin_lock_irqsave(&cs->lock, flags);
1753         if (cs->at_state.pending_commands == PC_UMMODE
1754             && !cs->cidmode
1755             && list_empty(&cs->temp_at_states)
1756             && cs->mode == M_CID) {
1757                 sequence = SEQ_UMMODE;
1758                 at_state = &cs->at_state;
1759                 for (i = 0; i < cs->channels; ++i) {
1760                         bcs = cs->bcs + i;
1761                         if (bcs->at_state.pending_commands ||
1762                             bcs->at_state.cid > 0) {
1763                                 sequence = SEQ_NONE;
1764                                 break;
1765                         }
1766                 }
1767         }
1768         spin_unlock_irqrestore(&cs->lock, flags);
1769         cs->at_state.pending_commands &= ~PC_UMMODE;
1770         if (sequence != SEQ_NONE) {
1771                 schedule_sequence(cs, at_state, sequence);
1772                 return;
1773         }
1774
1775         for (i = 0; i < cs->channels; ++i) {
1776                 bcs = cs->bcs + i;
1777                 if (bcs->at_state.pending_commands & PC_HUP) {
1778                         bcs->at_state.pending_commands &= ~PC_HUP;
1779                         if (bcs->at_state.pending_commands & PC_CID) {
1780                                 /* not yet dialing: PC_NOCID is sufficient */
1781                                 bcs->at_state.pending_commands |= PC_NOCID;
1782                                 bcs->at_state.pending_commands &= ~PC_CID;
1783                         } else {
1784                                 schedule_sequence(cs, &bcs->at_state, SEQ_HUP);
1785                                 return;
1786                         }
1787                 }
1788                 if (bcs->at_state.pending_commands & PC_NOCID) {
1789                         bcs->at_state.pending_commands &= ~PC_NOCID;
1790                         cs->curchannel = bcs->channel;
1791                         schedule_sequence(cs, &cs->at_state, SEQ_NOCID);
1792                         return;
1793                 } else if (bcs->at_state.pending_commands & PC_DLE0) {
1794                         bcs->at_state.pending_commands &= ~PC_DLE0;
1795                         cs->curchannel = bcs->channel;
1796                         schedule_sequence(cs, &cs->at_state, SEQ_DLE0);
1797                         return;
1798                 }
1799         }
1800
1801         list_for_each_entry(at_state, &cs->temp_at_states, list)
1802                 if (at_state->pending_commands & PC_HUP) {
1803                         at_state->pending_commands &= ~PC_HUP;
1804                         schedule_sequence(cs, at_state, SEQ_HUP);
1805                         return;
1806                 }
1807
1808         if (cs->at_state.pending_commands & PC_INIT) {
1809                 cs->at_state.pending_commands &= ~PC_INIT;
1810                 cs->dle = 0; //FIXME
1811                 cs->inbuf->inputstate = INS_command;
1812                 //FIXME reset card state (or -> LOCK0)?
1813                 schedule_sequence(cs, &cs->at_state, SEQ_INIT);
1814                 return;
1815         }
1816         if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1817                 cs->at_state.pending_commands &= ~PC_SHUTDOWN;
1818                 schedule_sequence(cs, &cs->at_state, SEQ_SHUTDOWN);
1819                 return;
1820         }
1821         if (cs->at_state.pending_commands & PC_CIDMODE) {
1822                 cs->at_state.pending_commands &= ~PC_CIDMODE;
1823                 if (cs->mode == M_UNIMODEM) {
1824                         cs->retry_count = 1;
1825                         schedule_sequence(cs, &cs->at_state, SEQ_CIDMODE);
1826                         return;
1827                 }
1828         }
1829
1830         for (i = 0; i < cs->channels; ++i) {
1831                 bcs = cs->bcs + i;
1832                 if (bcs->at_state.pending_commands & PC_DLE1) {
1833                         bcs->at_state.pending_commands &= ~PC_DLE1;
1834                         cs->curchannel = bcs->channel;
1835                         schedule_sequence(cs, &cs->at_state, SEQ_DLE1);
1836                         return;
1837                 }
1838                 if (bcs->at_state.pending_commands & PC_ACCEPT) {
1839                         bcs->at_state.pending_commands &= ~PC_ACCEPT;
1840                         schedule_sequence(cs, &bcs->at_state, SEQ_ACCEPT);
1841                         return;
1842                 }
1843                 if (bcs->at_state.pending_commands & PC_DIAL) {
1844                         bcs->at_state.pending_commands &= ~PC_DIAL;
1845                         schedule_sequence(cs, &bcs->at_state, SEQ_DIAL);
1846                         return;
1847                 }
1848                 if (bcs->at_state.pending_commands & PC_CID) {
1849                         switch (cs->mode) {
1850                         case M_UNIMODEM:
1851                                 cs->at_state.pending_commands |= PC_CIDMODE;
1852                                 gig_dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
1853                                 cs->commands_pending = 1;
1854                                 return;
1855 #ifdef GIG_MAYINITONDIAL
1856                         case M_UNKNOWN:
1857                                 schedule_init(cs, MS_INIT);
1858                                 return;
1859 #endif
1860                         }
1861                         bcs->at_state.pending_commands &= ~PC_CID;
1862                         cs->curchannel = bcs->channel;
1863 #ifdef GIG_RETRYCID
1864                         cs->retry_count = 2;
1865 #else
1866                         cs->retry_count = 1;
1867 #endif
1868                         schedule_sequence(cs, &cs->at_state, SEQ_CID);
1869                         return;
1870                 }
1871         }
1872 }
1873
1874 static void process_events(struct cardstate *cs)
1875 {
1876         struct event_t *ev;
1877         unsigned head, tail;
1878         int i;
1879         int check_flags = 0;
1880         int was_busy;
1881         unsigned long flags;
1882
1883         spin_lock_irqsave(&cs->ev_lock, flags);
1884         head = cs->ev_head;
1885
1886         for (i = 0; i < 2 * MAX_EVENTS; ++i) {
1887                 tail = cs->ev_tail;
1888                 if (tail == head) {
1889                         if (!check_flags && !cs->commands_pending)
1890                                 break;
1891                         check_flags = 0;
1892                         spin_unlock_irqrestore(&cs->ev_lock, flags);
1893                         process_command_flags(cs);
1894                         spin_lock_irqsave(&cs->ev_lock, flags);
1895                         tail = cs->ev_tail;
1896                         if (tail == head) {
1897                                 if (!cs->commands_pending)
1898                                         break;
1899                                 continue;
1900                         }
1901                 }
1902
1903                 ev = cs->events + head;
1904                 was_busy = cs->cur_at_seq != SEQ_NONE;
1905                 spin_unlock_irqrestore(&cs->ev_lock, flags);
1906                 process_event(cs, ev);
1907                 spin_lock_irqsave(&cs->ev_lock, flags);
1908                 kfree(ev->ptr);
1909                 ev->ptr = NULL;
1910                 if (was_busy && cs->cur_at_seq == SEQ_NONE)
1911                         check_flags = 1;
1912
1913                 head = (head + 1) % MAX_EVENTS;
1914                 cs->ev_head = head;
1915         }
1916
1917         spin_unlock_irqrestore(&cs->ev_lock, flags);
1918
1919         if (i == 2 * MAX_EVENTS) {
1920                 dev_err(cs->dev,
1921                         "infinite loop in process_events; aborting.\n");
1922         }
1923 }
1924
1925 /* tasklet scheduled on any event received from the Gigaset device
1926  * parameter:
1927  *      data    ISDN controller state structure
1928  */
1929 void gigaset_handle_event(unsigned long data)
1930 {
1931         struct cardstate *cs = (struct cardstate *) data;
1932
1933         /* handle incoming data on control/common channel */
1934         if (cs->inbuf->head != cs->inbuf->tail) {
1935                 gig_dbg(DEBUG_INTR, "processing new data");
1936                 cs->ops->handle_input(cs->inbuf);
1937         }
1938
1939         process_events(cs);
1940 }