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_UNKNOWN     -4      /* unknown response   */
  72 #define RSP_FAIL        -5      /* internal error     */
  73 #define RSP_INVAL       -6      /* invalid response   */
  74
  75 #define RSP_NONE        -19
  76 #define RSP_STRING      -20
  77 #define RSP_NULL        -21
  78 #define RSP_RETRYFAIL   -22
  79 #define RSP_RETRY       -23
  80 #define RSP_SKIP        -24
  81 #define RSP_INIT        -27
  82 #define RSP_ANY         -26
  83 #define RSP_LAST        -28
  84 #define RSP_NODEV       -9
  85
  86 /* actions for process_response */
  87 #define ACT_NOTHING             0
  88 #define ACT_SETDLE1             1
  89 #define ACT_SETDLE0             2
  90 #define ACT_FAILINIT            3
  91 #define ACT_HUPMODEM            4
  92 #define ACT_CONFIGMODE          5
  93 #define ACT_INIT                6
  94 #define ACT_DLE0                7
  95 #define ACT_DLE1                8
  96 #define ACT_FAILDLE0            9
  97 #define ACT_FAILDLE1            10
  98 #define ACT_RING                11
  99 #define ACT_CID                 12
 100 #define ACT_FAILCID             13
 101 #define ACT_SDOWN               14
 102 #define ACT_FAILSDOWN           15
 103 #define ACT_DEBUG               16
 104 #define ACT_WARN                17
 105 #define ACT_DIALING             18
 106 #define ACT_ABORTDIAL           19
 107 #define ACT_DISCONNECT          20
 108 #define ACT_CONNECT             21
 109 #define ACT_REMOTEREJECT        22
 110 #define ACT_CONNTIMEOUT         23
 111 #define ACT_REMOTEHUP           24
 112 #define ACT_ABORTHUP            25
 113 #define ACT_ICALL               26
 114 #define ACT_ACCEPTED            27
 115 #define ACT_ABORTACCEPT         28
 116 #define ACT_TIMEOUT             29
 117 #define ACT_GETSTRING           30
 118 #define ACT_SETVER              31
 119 #define ACT_FAILVER             32
 120 #define ACT_GOTVER              33
 121 #define ACT_TEST                34
 122 #define ACT_ERROR               35
 123 #define ACT_ABORTCID            36
 124 #define ACT_ZCAU                37
 125 #define ACT_NOTIFY_BC_DOWN      38
 126 #define ACT_NOTIFY_BC_UP        39
 127 #define ACT_DIAL                40
 128 #define ACT_ACCEPT              41
 129 #define ACT_HUP                 43
 130 #define ACT_IF_LOCK             44
 131 #define ACT_START               45
 132 #define ACT_STOP                46
 133 #define ACT_FAKEDLE0            47
 134 #define ACT_FAKEHUP             48
 135 #define ACT_FAKESDOWN           49
 136 #define ACT_SHUTDOWN            50
 137 #define ACT_PROC_CIDMODE        51
 138 #define ACT_UMODESET            52
 139 #define ACT_FAILUMODE           53
 140 #define ACT_CMODESET            54
 141 #define ACT_FAILCMODE           55
 142 #define ACT_IF_VER              56
 143 #define ACT_CMD                 100
 144
 145 /* at command sequences */
 146 #define SEQ_NONE        0
 147 #define SEQ_INIT        100
 148 #define SEQ_DLE0        200
 149 #define SEQ_DLE1        250
 150 #define SEQ_CID         300
 151 #define SEQ_NOCID       350
 152 #define SEQ_HUP         400
 153 #define SEQ_DIAL        600
 154 #define SEQ_ACCEPT      720
 155 #define SEQ_SHUTDOWN    500
 156 #define SEQ_CIDMODE     10
 157 #define SEQ_UMMODE      11
 158
 159
 160 /* 100: init, 200: dle0, 250:dle1, 300: get cid (dial), 350: "hup" (no cid),
 161  * 400: hup, 500: reset, 600: dial, 700: ring */
 162 struct reply_t gigaset_tab_nocid[] =
 163 {
 164 /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout,
 165  * action, command */
 166
 167 /* initialize device, set cid mode if possible */
 168 {RSP_INIT,       -1,  -1, SEQ_INIT,             100,  1, {ACT_TIMEOUT} },
 169
 170 {EV_TIMEOUT,    100, 100, -1,                   101,  3, {0},   "Z\r"},
 171 {RSP_OK,        101, 103, -1,                   120,  5, {ACT_GETSTRING},
 172                                                                 "+GMR\r"},
 173
 174 {EV_TIMEOUT,    101, 101, -1,                   102,  5, {0},   "Z\r"},
 175 {RSP_ERROR,     101, 101, -1,                   102,  5, {0},   "Z\r"},
 176
 177 {EV_TIMEOUT,    102, 102, -1,                   108,  5, {ACT_SETDLE1},
 178                                                                 "^SDLE=0\r"},
 179 {RSP_OK,        108, 108, -1,                   104, -1},
 180 {RSP_ZDLE,      104, 104,  0,                   103,  5, {0},   "Z\r"},
 181 {EV_TIMEOUT,    104, 104, -1,                     0,  0, {ACT_FAILINIT} },
 182 {RSP_ERROR,     108, 108, -1,                     0,  0, {ACT_FAILINIT} },
 183
 184 {EV_TIMEOUT,    108, 108, -1,                   105,  2, {ACT_SETDLE0,
 185                                                           ACT_HUPMODEM,
 186                                                           ACT_TIMEOUT} },
 187 {EV_TIMEOUT,    105, 105, -1,                   103,  5, {0},   "Z\r"},
 188
 189 {RSP_ERROR,     102, 102, -1,                   107,  5, {0},   "^GETPRE\r"},
 190 {RSP_OK,        107, 107, -1,                     0,  0, {ACT_CONFIGMODE} },
 191 {RSP_ERROR,     107, 107, -1,                     0,  0, {ACT_FAILINIT} },
 192 {EV_TIMEOUT,    107, 107, -1,                     0,  0, {ACT_FAILINIT} },
 193
 194 {RSP_ERROR,     103, 103, -1,                     0,  0, {ACT_FAILINIT} },
 195 {EV_TIMEOUT,    103, 103, -1,                     0,  0, {ACT_FAILINIT} },
 196
 197 {RSP_STRING,    120, 120, -1,                   121, -1, {ACT_SETVER} },
 198
 199 {EV_TIMEOUT,    120, 121, -1,                     0,  0, {ACT_FAILVER,
 200                                                           ACT_INIT} },
 201 {RSP_ERROR,     120, 121, -1,                     0,  0, {ACT_FAILVER,
 202                                                           ACT_INIT} },
 203 {RSP_OK,        121, 121, -1,                     0,  0, {ACT_GOTVER,
 204                                                           ACT_INIT} },
 205
 206 /* leave dle mode */
 207 {RSP_INIT,        0,   0, SEQ_DLE0,             201,  5, {0},   "^SDLE=0\r"},
 208 {RSP_OK,        201, 201, -1,                   202, -1},
 209 {RSP_ZDLE,      202, 202,  0,                     0,  0, {ACT_DLE0} },
 210 {RSP_NODEV,     200, 249, -1,                     0,  0, {ACT_FAKEDLE0} },
 211 {RSP_ERROR,     200, 249, -1,                     0,  0, {ACT_FAILDLE0} },
 212 {EV_TIMEOUT,    200, 249, -1,                     0,  0, {ACT_FAILDLE0} },
 213
 214 /* enter dle mode */
 215 {RSP_INIT,        0,   0, SEQ_DLE1,             251,  5, {0},   "^SDLE=1\r"},
 216 {RSP_OK,        251, 251, -1,                   252, -1},
 217 {RSP_ZDLE,      252, 252,  1,                     0,  0, {ACT_DLE1} },
 218 {RSP_ERROR,     250, 299, -1,                     0,  0, {ACT_FAILDLE1} },
 219 {EV_TIMEOUT,    250, 299, -1,                     0,  0, {ACT_FAILDLE1} },
 220
 221 /* incoming call */
 222 {RSP_RING,       -1,  -1, -1,                    -1, -1, {ACT_RING} },
 223
 224 /* get cid */
 225 {RSP_INIT,        0,   0, SEQ_CID,              301,  5, {0},   "^SGCI?\r"},
 226 {RSP_OK,        301, 301, -1,                   302, -1},
 227 {RSP_ZGCI,      302, 302, -1,                     0,  0, {ACT_CID} },
 228 {RSP_ERROR,     301, 349, -1,                     0,  0, {ACT_FAILCID} },
 229 {EV_TIMEOUT,    301, 349, -1,                     0,  0, {ACT_FAILCID} },
 230
 231 /* enter cid mode */
 232 {RSP_INIT,        0,   0, SEQ_CIDMODE,          150,  5, {0},   "^SGCI=1\r"},
 233 {RSP_OK,        150, 150, -1,                     0,  0, {ACT_CMODESET} },
 234 {RSP_ERROR,     150, 150, -1,                     0,  0, {ACT_FAILCMODE} },
 235 {EV_TIMEOUT,    150, 150, -1,                     0,  0, {ACT_FAILCMODE} },
 236
 237 /* leave cid mode */
 238 {RSP_INIT,        0,   0, SEQ_UMMODE,           160,  5, {0},   "Z\r"},
 239 {RSP_OK,        160, 160, -1,                     0,  0, {ACT_UMODESET} },
 240 {RSP_ERROR,     160, 160, -1,                     0,  0, {ACT_FAILUMODE} },
 241 {EV_TIMEOUT,    160, 160, -1,                     0,  0, {ACT_FAILUMODE} },
 242
 243 /* abort getting cid */
 244 {RSP_INIT,        0,   0, SEQ_NOCID,              0,  0, {ACT_ABORTCID} },
 245
 246 /* reset */
 247 {RSP_INIT,        0,   0, SEQ_SHUTDOWN,         504,  5, {0},   "Z\r"},
 248 {RSP_OK,        504, 504, -1,                     0,  0, {ACT_SDOWN} },
 249 {RSP_ERROR,     501, 599, -1,                     0,  0, {ACT_FAILSDOWN} },
 250 {EV_TIMEOUT,    501, 599, -1,                     0,  0, {ACT_FAILSDOWN} },
 251 {RSP_NODEV,     501, 599, -1,                     0,  0, {ACT_FAKESDOWN} },
 252
 253 {EV_PROC_CIDMODE, -1, -1, -1,                    -1, -1, {ACT_PROC_CIDMODE} },
 254 {EV_IF_LOCK,     -1,  -1, -1,                    -1, -1, {ACT_IF_LOCK} },
 255 {EV_IF_VER,      -1,  -1, -1,                    -1, -1, {ACT_IF_VER} },
 256 {EV_START,       -1,  -1, -1,                    -1, -1, {ACT_START} },
 257 {EV_STOP,        -1,  -1, -1,                    -1, -1, {ACT_STOP} },
 258 {EV_SHUTDOWN,    -1,  -1, -1,                    -1, -1, {ACT_SHUTDOWN} },
 259
 260 /* misc. */
 261 {RSP_ERROR,      -1,  -1, -1,                    -1, -1, {ACT_ERROR} },
 262 {RSP_ZCFGT,      -1,  -1, -1,                    -1, -1, {ACT_DEBUG} },
 263 {RSP_ZCFG,       -1,  -1, -1,                    -1, -1, {ACT_DEBUG} },
 264 {RSP_ZLOG,       -1,  -1, -1,                    -1, -1, {ACT_DEBUG} },
 265 {RSP_ZMWI,       -1,  -1, -1,                    -1, -1, {ACT_DEBUG} },
 266 {RSP_ZABINFO,    -1,  -1, -1,                    -1, -1, {ACT_DEBUG} },
 267 {RSP_ZSMLSTCHG,  -1,  -1, -1,                    -1, -1, {ACT_DEBUG} },
 268
 269 {RSP_ZCAU,       -1,  -1, -1,                    -1, -1, {ACT_ZCAU} },
 270 {RSP_NONE,       -1,  -1, -1,                    -1, -1, {ACT_DEBUG} },
 271 {RSP_ANY,        -1,  -1, -1,                    -1, -1, {ACT_WARN} },
 272 {RSP_LAST}
 273 };
 274
 275 /* 600: start dialing, 650: dial in progress, 800: connection is up, 700: ring,
 276  * 400: hup, 750: accepted icall */
 277 struct reply_t gigaset_tab_cid[] =
 278 {
 279 /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout,
 280  * action, command */
 281
 282 /* dial */
 283 {EV_DIAL,        -1,  -1, -1,                    -1, -1, {ACT_DIAL} },
 284 {RSP_INIT,        0,   0, SEQ_DIAL,             601,  5, {ACT_CMD+AT_BC} },
 285 {RSP_OK,        601, 601, -1,                   602,  5, {ACT_CMD+AT_HLC} },
 286 {RSP_NULL,      602, 602, -1,                   603,  5, {ACT_CMD+AT_PROTO} },
 287 {RSP_OK,        602, 602, -1,                   603,  5, {ACT_CMD+AT_PROTO} },
 288 {RSP_OK,        603, 603, -1,                   604,  5, {ACT_CMD+AT_TYPE} },
 289 {RSP_OK,        604, 604, -1,                   605,  5, {ACT_CMD+AT_MSN} },
 290 {RSP_NULL,      605, 605, -1,                   606,  5, {ACT_CMD+AT_CLIP} },
 291 {RSP_OK,        605, 605, -1,                   606,  5, {ACT_CMD+AT_CLIP} },
 292 {RSP_NULL,      606, 606, -1,                   607,  5, {ACT_CMD+AT_ISO} },
 293 {RSP_OK,        606, 606, -1,                   607,  5, {ACT_CMD+AT_ISO} },
 294 {RSP_OK,        607, 607, -1,                   608,  5, {0},   "+VLS=17\r"},
 295 {RSP_OK,        608, 608, -1,                   609, -1},
 296 {RSP_ZSAU,      609, 609, ZSAU_PROCEEDING,      610,  5, {ACT_CMD+AT_DIAL} },
 297 {RSP_OK,        610, 610, -1,                   650,  0, {ACT_DIALING} },
 298
 299 {RSP_ERROR,     601, 610, -1,                     0,  0, {ACT_ABORTDIAL} },
 300 {EV_TIMEOUT,    601, 610, -1,                     0,  0, {ACT_ABORTDIAL} },
 301
 302 /* optional dialing responses */
 303 {EV_BC_OPEN,    650, 650, -1,                   651, -1},
 304 {RSP_ZVLS,      609, 651, 17,                    -1, -1, {ACT_DEBUG} },
 305 {RSP_ZCTP,      610, 651, -1,                    -1, -1, {ACT_DEBUG} },
 306 {RSP_ZCPN,      610, 651, -1,                    -1, -1, {ACT_DEBUG} },
 307 {RSP_ZSAU,      650, 651, ZSAU_CALL_DELIVERED,   -1, -1, {ACT_DEBUG} },
 308
 309 /* connect */
 310 {RSP_ZSAU,      650, 650, ZSAU_ACTIVE,          800, -1, {ACT_CONNECT} },
 311 {RSP_ZSAU,      651, 651, ZSAU_ACTIVE,          800, -1, {ACT_CONNECT,
 312                                                           ACT_NOTIFY_BC_UP} },
 313 {RSP_ZSAU,      750, 750, ZSAU_ACTIVE,          800, -1, {ACT_CONNECT} },
 314 {RSP_ZSAU,      751, 751, ZSAU_ACTIVE,          800, -1, {ACT_CONNECT,
 315                                                           ACT_NOTIFY_BC_UP} },
 316 {EV_BC_OPEN,    800, 800, -1,                   800, -1, {ACT_NOTIFY_BC_UP} },
 317
 318 /* remote hangup */
 319 {RSP_ZSAU,      650, 651, ZSAU_DISCONNECT_IND,    0,  0, {ACT_REMOTEREJECT} },
 320 {RSP_ZSAU,      750, 751, ZSAU_DISCONNECT_IND,    0,  0, {ACT_REMOTEHUP} },
 321 {RSP_ZSAU,      800, 800, ZSAU_DISCONNECT_IND,    0,  0, {ACT_REMOTEHUP} },
 322
 323 /* hangup */
 324 {EV_HUP,         -1,  -1, -1,                    -1, -1, {ACT_HUP} },
 325 {RSP_INIT,       -1,  -1, SEQ_HUP,              401,  5, {0},   "+VLS=0\r"},
 326 {RSP_OK,        401, 401, -1,                   402,  5},
 327 {RSP_ZVLS,      402, 402,  0,                   403,  5},
 328 {RSP_ZSAU,      403, 403, ZSAU_DISCONNECT_REQ,   -1, -1, {ACT_DEBUG} },
 329 {RSP_ZSAU,      403, 403, ZSAU_NULL,              0,  0, {ACT_DISCONNECT} },
 330 {RSP_NODEV,     401, 403, -1,                     0,  0, {ACT_FAKEHUP} },
 331 {RSP_ERROR,     401, 401, -1,                     0,  0, {ACT_ABORTHUP} },
 332 {EV_TIMEOUT,    401, 403, -1,                     0,  0, {ACT_ABORTHUP} },
 333
 334 {EV_BC_CLOSED,    0,   0, -1,                     0, -1, {ACT_NOTIFY_BC_DOWN} },
 335
 336 /* ring */
 337 {RSP_ZBC,       700, 700, -1,                    -1, -1, {0} },
 338 {RSP_ZHLC,      700, 700, -1,                    -1, -1, {0} },
 339 {RSP_NMBR,      700, 700, -1,                    -1, -1, {0} },
 340 {RSP_ZCPN,      700, 700, -1,                    -1, -1, {0} },
 341 {RSP_ZCTP,      700, 700, -1,                    -1, -1, {0} },
 342 {EV_TIMEOUT,    700, 700, -1,                   720, 720, {ACT_ICALL} },
 343 {EV_BC_CLOSED,  720, 720, -1,                     0, -1, {ACT_NOTIFY_BC_DOWN} },
 344
 345 /*accept icall*/
 346 {EV_ACCEPT,      -1,  -1, -1,                    -1, -1, {ACT_ACCEPT} },
 347 {RSP_INIT,      720, 720, SEQ_ACCEPT,           721,  5, {ACT_CMD+AT_PROTO} },
 348 {RSP_OK,        721, 721, -1,                   722,  5, {ACT_CMD+AT_ISO} },
 349 {RSP_OK,        722, 722, -1,                   723,  5, {0},   "+VLS=17\r"},
 350 {RSP_OK,        723, 723, -1,                   724,  5, {0} },
 351 {RSP_ZVLS,      724, 724, 17,                   750, 50, {ACT_ACCEPTED} },
 352 {RSP_ERROR,     721, 729, -1,                     0,  0, {ACT_ABORTACCEPT} },
 353 {EV_TIMEOUT,    721, 729, -1,                     0,  0, {ACT_ABORTACCEPT} },
 354 {RSP_ZSAU,      700, 729, ZSAU_NULL,              0,  0, {ACT_ABORTACCEPT} },
 355 {RSP_ZSAU,      700, 729, ZSAU_ACTIVE,            0,  0, {ACT_ABORTACCEPT} },
 356 {RSP_ZSAU,      700, 729, ZSAU_DISCONNECT_IND,    0,  0, {ACT_ABORTACCEPT} },
 357
 358 {EV_BC_OPEN,    750, 750, -1,                   751, -1},
 359 {EV_TIMEOUT,    750, 751, -1,                     0,  0, {ACT_CONNTIMEOUT} },
 360
 361 /* B channel closed (general case) */
 362 {EV_BC_CLOSED,   -1,  -1, -1,                    -1, -1, {ACT_NOTIFY_BC_DOWN} },
 363
 364 /* misc. */
 365 {RSP_ZCON,       -1,  -1, -1,                    -1, -1, {ACT_DEBUG} },
 366 {RSP_ZCCR,       -1,  -1, -1,                    -1, -1, {ACT_DEBUG} },
 367 {RSP_ZAOC,       -1,  -1, -1,                    -1, -1, {ACT_DEBUG} },
 368 {RSP_ZCSTR,      -1,  -1, -1,                    -1, -1, {ACT_DEBUG} },
 369
 370 {RSP_ZCAU,       -1,  -1, -1,                    -1, -1, {ACT_ZCAU} },
 371 {RSP_NONE,       -1,  -1, -1,                    -1, -1, {ACT_DEBUG} },
 372 {RSP_ANY,        -1,  -1, -1,                    -1, -1, {ACT_WARN} },
 373 {RSP_LAST}
 374 };
 375
 376
 377 static const struct resp_type_t {
 378         unsigned char   *response;
 379         int             resp_code;
 380         int             type;
 381 } resp_type[] =
 382 {
 383         {"OK",          RSP_OK,         RT_NOTHING},
 384         {"ERROR",       RSP_ERROR,      RT_NOTHING},
 385         {"ZSAU",        RSP_ZSAU,       RT_ZSAU},
 386         {"ZCAU",        RSP_ZCAU,       RT_ZCAU},
 387         {"RING",        RSP_RING,       RT_RING},
 388         {"ZGCI",        RSP_ZGCI,       RT_NUMBER},
 389         {"ZVLS",        RSP_ZVLS,       RT_NUMBER},
 390         {"ZCTP",        RSP_ZCTP,       RT_NUMBER},
 391         {"ZDLE",        RSP_ZDLE,       RT_NUMBER},
 392         {"ZCFGT",       RSP_ZCFGT,      RT_NUMBER},
 393         {"ZCCR",        RSP_ZCCR,       RT_NUMBER},
 394         {"ZMWI",        RSP_ZMWI,       RT_NUMBER},
 395         {"ZHLC",        RSP_ZHLC,       RT_STRING},
 396         {"ZBC",         RSP_ZBC,        RT_STRING},
 397         {"NMBR",        RSP_NMBR,       RT_STRING},
 398         {"ZCPN",        RSP_ZCPN,       RT_STRING},
 399         {"ZCON",        RSP_ZCON,       RT_STRING},
 400         {"ZAOC",        RSP_ZAOC,       RT_STRING},
 401         {"ZCSTR",       RSP_ZCSTR,      RT_STRING},
 402         {"ZCFG",        RSP_ZCFG,       RT_HEX},
 403         {"ZLOG",        RSP_ZLOG,       RT_NOTHING},
 404         {"ZABINFO",     RSP_ZABINFO,    RT_NOTHING},
 405         {"ZSMLSTCHG",   RSP_ZSMLSTCHG,  RT_NOTHING},
 406         {NULL,          0,              0}
 407 };
 408
 409 static const struct zsau_resp_t {
 410         unsigned char   *str;
 411         int             code;
 412 } zsau_resp[] =
 413 {
 414         {"OUTGOING_CALL_PROCEEDING",    ZSAU_OUTGOING_CALL_PROCEEDING},
 415         {"CALL_DELIVERED",              ZSAU_CALL_DELIVERED},
 416         {"ACTIVE",                      ZSAU_ACTIVE},
 417         {"DISCONNECT_IND",              ZSAU_DISCONNECT_IND},
 418         {"NULL",                        ZSAU_NULL},
 419         {"DISCONNECT_REQ",              ZSAU_DISCONNECT_REQ},
 420         {NULL,                          ZSAU_UNKNOWN}
 421 };
 422
 423 /*
 424  * Get integer from char-pointer
 425  */
 426 static int isdn_getnum(char *p)
 427 {
 428         int v = -1;
 429
 430         gig_dbg(DEBUG_TRANSCMD, "string: %s", p);
 431
 432         while (*p >= '0' && *p <= '9')
 433                 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p++) - '0');
 434         if (*p)
 435                 v = -1; /* invalid Character */
 436         return v;
 437 }
 438
 439 /*
 440  * Get integer from char-pointer
 441  */
 442 static int isdn_gethex(char *p)
 443 {
 444         int v = 0;
 445         int c;
 446
 447         gig_dbg(DEBUG_TRANSCMD, "string: %s", p);
 448
 449         if (!*p)
 450                 return -1;
 451
 452         do {
 453                 if (v > (INT_MAX - 15) / 16)
 454                         return -1;
 455                 c = *p;
 456                 if (c >= '0' && c <= '9')
 457                         c -= '0';
 458                 else if (c >= 'a' && c <= 'f')
 459                         c -= 'a' - 10;
 460                 else if (c >= 'A' && c <= 'F')
 461                         c -= 'A' - 10;
 462                 else
 463                         return -1;
 464                 v = v * 16 + c;
 465         } while (*++p);
 466
 467         return v;
 468 }
 469
 470 /* retrieve CID from parsed response
 471  * returns 0 if no CID, -1 if invalid CID, or CID value 1..65535
 472  */
 473 static int cid_of_response(char *s)
 474 {
 475         int cid;
 476
 477         if (s[-1] != ';')
 478                 return 0;       /* no CID separator */
 479         cid = isdn_getnum(s);
 480         if (cid < 0)
 481                 return 0;       /* CID not numeric */
 482         if (cid < 1 || cid > 65535)
 483                 return -1;      /* CID out of range */
 484         return cid;
 485 }
 486
 487 /**
 488  * gigaset_handle_modem_response() - process received modem response
 489  * @cs:         device descriptor structure.
 490  *
 491  * Called by asyncdata/isocdata if a block of data received from the
 492  * device must be processed as a modem command response. The data is
 493  * already in the cs structure.
 494  */
 495 void gigaset_handle_modem_response(struct cardstate *cs)
 496 {
 497         unsigned char *argv[MAX_REC_PARAMS + 1];
 498         int params;
 499         int i, j;
 500         const struct resp_type_t *rt;
 501         const struct zsau_resp_t *zr;
 502         int curarg;
 503         unsigned long flags;
 504         unsigned next, tail, head;
 505         struct event_t *event;
 506         int resp_code;
 507         int param_type;
 508         int abort;
 509         size_t len;
 510         int cid;
 511         int rawstring;
 512
 513         len = cs->cbytes;
 514         if (!len) {
 515                 /* ignore additional LFs/CRs (M10x config mode or cx100) */
 516                 gig_dbg(DEBUG_MCMD, "skipped EOL [%02X]", cs->respdata[len]);
 517                 return;
 518         }
 519         cs->respdata[len] = 0;
 520         gig_dbg(DEBUG_TRANSCMD, "raw string: '%s'", cs->respdata);
 521         argv[0] = cs->respdata;
 522         params = 1;
 523         if (cs->at_state.getstring) {
 524                 /* getstring only allowed without cid at the moment */
 525                 cs->at_state.getstring = 0;
 526                 rawstring = 1;
 527                 cid = 0;
 528         } else {
 529                 /* parse line */
 530                 for (i = 0; i < len; i++)
 531                         switch (cs->respdata[i]) {
 532                         case ';':
 533                         case ',':
 534                         case '=':
 535                                 if (params > MAX_REC_PARAMS) {
 536                                         dev_warn(cs->dev,
 537                                            "too many parameters in response\n");
 538                                         /* need last parameter (might be CID) */
 539                                         params--;
 540                                 }
 541                                 argv[params++] = cs->respdata + i + 1;
 542                         }
 543
 544                 rawstring = 0;
 545                 cid = params > 1 ? cid_of_response(argv[params-1]) : 0;
 546                 if (cid < 0) {
 547                         gigaset_add_event(cs, &cs->at_state, RSP_INVAL,
 548                                           NULL, 0, NULL);
 549                         return;
 550                 }
 551
 552                 for (j = 1; j < params; ++j)
 553                         argv[j][-1] = 0;
 554
 555                 gig_dbg(DEBUG_TRANSCMD, "CMD received: %s", argv[0]);
 556                 if (cid) {
 557                         --params;
 558                         gig_dbg(DEBUG_TRANSCMD, "CID: %s", argv[params]);
 559                 }
 560                 gig_dbg(DEBUG_TRANSCMD, "available params: %d", params - 1);
 561                 for (j = 1; j < params; j++)
 562                         gig_dbg(DEBUG_TRANSCMD, "param %d: %s", j, argv[j]);
 563         }
 564
 565         spin_lock_irqsave(&cs->ev_lock, flags);
 566         head = cs->ev_head;
 567         tail = cs->ev_tail;
 568
 569         abort = 1;
 570         curarg = 0;
 571         while (curarg < params) {
 572                 next = (tail + 1) % MAX_EVENTS;
 573                 if (unlikely(next == head)) {
 574                         dev_err(cs->dev, "event queue full\n");
 575                         break;
 576                 }
 577
 578                 event = cs->events + tail;
 579                 event->at_state = NULL;
 580                 event->cid = cid;
 581                 event->ptr = NULL;
 582                 event->arg = NULL;
 583                 tail = next;
 584
 585                 if (rawstring) {
 586                         resp_code = RSP_STRING;
 587                         param_type = RT_STRING;
 588                 } else {
 589                         for (rt = resp_type; rt->response; ++rt)
 590                                 if (!strcmp(argv[curarg], rt->response))
 591                                         break;
 592
 593                         if (!rt->response) {
 594                                 event->type = RSP_UNKNOWN;
 595                                 dev_warn(cs->dev,
 596                                          "unknown modem response: %s\n",
 597                                          argv[curarg]);
 598                                 break;
 599                         }
 600
 601                         resp_code = rt->resp_code;
 602                         param_type = rt->type;
 603                         ++curarg;
 604                 }
 605
 606                 event->type = resp_code;
 607
 608                 switch (param_type) {
 609                 case RT_NOTHING:
 610                         break;
 611                 case RT_RING:
 612                         if (!cid) {
 613                                 dev_err(cs->dev,
 614                                         "received RING without CID!\n");
 615                                 event->type = RSP_INVAL;
 616                                 abort = 1;
 617                         } else {
 618                                 event->cid = 0;
 619                                 event->parameter = cid;
 620                                 abort = 0;
 621                         }
 622                         break;
 623                 case RT_ZSAU:
 624                         if (curarg >= params) {
 625                                 event->parameter = ZSAU_NONE;
 626                                 break;
 627                         }
 628                         for (zr = zsau_resp; zr->str; ++zr)
 629                                 if (!strcmp(argv[curarg], zr->str))
 630                                         break;
 631                         event->parameter = zr->code;
 632                         if (!zr->str)
 633                                 dev_warn(cs->dev,
 634                                         "%s: unknown parameter %s after ZSAU\n",
 635                                          __func__, argv[curarg]);
 636                         ++curarg;
 637                         break;
 638                 case RT_STRING:
 639                         if (curarg < params) {
 640                                 event->ptr = kstrdup(argv[curarg], GFP_ATOMIC);
 641                                 if (!event->ptr)
 642                                         dev_err(cs->dev, "out of memory\n");
 643                                 ++curarg;
 644                         }
 645                         gig_dbg(DEBUG_CMD, "string==%s",
 646                                 event->ptr ? (char *) event->ptr : "NULL");
 647                         break;
 648                 case RT_ZCAU:
 649                         event->parameter = -1;
 650                         if (curarg + 1 < params) {
 651                                 i = isdn_gethex(argv[curarg]);
 652                                 j = isdn_gethex(argv[curarg + 1]);
 653                                 if (i >= 0 && i < 256 && j >= 0 && j < 256)
 654                                         event->parameter = (unsigned) i << 8
 655                                                            | j;
 656                                 curarg += 2;
 657                         } else
 658                                 curarg = params - 1;
 659                         break;
 660                 case RT_NUMBER:
 661                 case RT_HEX:
 662                         if (curarg < params) {
 663                                 if (param_type == RT_HEX)
 664                                         event->parameter =
 665                                                 isdn_gethex(argv[curarg]);
 666                                 else
 667                                         event->parameter =
 668                                                 isdn_getnum(argv[curarg]);
 669                                 ++curarg;
 670                         } else
 671                                 event->parameter = -1;
 672                         gig_dbg(DEBUG_CMD, "parameter==%d", event->parameter);
 673                         break;
 674                 }
 675
 676                 if (resp_code == RSP_ZDLE)
 677                         cs->dle = event->parameter;
 678
 679                 if (abort)
 680                         break;
 681         }
 682
 683         cs->ev_tail = tail;
 684         spin_unlock_irqrestore(&cs->ev_lock, flags);
 685
 686         if (curarg != params)
 687                 gig_dbg(DEBUG_ANY,
 688                         "invalid number of processed parameters: %d/%d",
 689                         curarg, params);
 690 }
 691 EXPORT_SYMBOL_GPL(gigaset_handle_modem_response);
 692
 693 /* disconnect
 694  * process closing of connection associated with given AT state structure
 695  */
 696 static void disconnect(struct at_state_t **at_state_p)
 697 {
 698         unsigned long flags;
 699         struct bc_state *bcs = (*at_state_p)->bcs;
 700         struct cardstate *cs = (*at_state_p)->cs;
 701
 702         spin_lock_irqsave(&cs->lock, flags);
 703         ++(*at_state_p)->seq_index;
 704
 705         /* revert to selected idle mode */
 706         if (!cs->cidmode) {
 707                 cs->at_state.pending_commands |= PC_UMMODE;
 708                 cs->commands_pending = 1;
 709                 gig_dbg(DEBUG_CMD, "Scheduling PC_UMMODE");
 710         }
 711         spin_unlock_irqrestore(&cs->lock, flags);
 712
 713         if (bcs) {
 714                 /* B channel assigned: invoke hardware specific handler */
 715                 cs->ops->close_bchannel(bcs);
 716                 /* notify LL */
 717                 if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
 718                         bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
 719                         gigaset_isdn_hupD(bcs);
 720                 }
 721         } else {
 722                 /* no B channel assigned: just deallocate */
 723                 spin_lock_irqsave(&cs->lock, flags);
 724                 list_del(&(*at_state_p)->list);
 725                 kfree(*at_state_p);
 726                 *at_state_p = NULL;
 727                 spin_unlock_irqrestore(&cs->lock, flags);
 728         }
 729 }
 730
 731 /* get_free_channel
 732  * get a free AT state structure: either one of those associated with the
 733  * B channels of the Gigaset device, or if none of those is available,
 734  * a newly allocated one with bcs=NULL
 735  * The structure should be freed by calling disconnect() after use.
 736  */
 737 static inline struct at_state_t *get_free_channel(struct cardstate *cs,
 738                                                   int cid)
 739 /* cids: >0: siemens-cid
 740           0: without cid
 741          -1: no cid assigned yet
 742 */
 743 {
 744         unsigned long flags;
 745         int i;
 746         struct at_state_t *ret;
 747
 748         for (i = 0; i < cs->channels; ++i)
 749                 if (gigaset_get_channel(cs->bcs + i)) {
 750                         ret = &cs->bcs[i].at_state;
 751                         ret->cid = cid;
 752                         return ret;
 753                 }
 754
 755         spin_lock_irqsave(&cs->lock, flags);
 756         ret = kmalloc(sizeof(struct at_state_t), GFP_ATOMIC);
 757         if (ret) {
 758                 gigaset_at_init(ret, NULL, cs, cid);
 759                 list_add(&ret->list, &cs->temp_at_states);
 760         }
 761         spin_unlock_irqrestore(&cs->lock, flags);
 762         return ret;
 763 }
 764
 765 static void init_failed(struct cardstate *cs, int mode)
 766 {
 767         int i;
 768         struct at_state_t *at_state;
 769
 770         cs->at_state.pending_commands &= ~PC_INIT;
 771         cs->mode = mode;
 772         cs->mstate = MS_UNINITIALIZED;
 773         gigaset_free_channels(cs);
 774         for (i = 0; i < cs->channels; ++i) {
 775                 at_state = &cs->bcs[i].at_state;
 776                 if (at_state->pending_commands & PC_CID) {
 777                         at_state->pending_commands &= ~PC_CID;
 778                         at_state->pending_commands |= PC_NOCID;
 779                         cs->commands_pending = 1;
 780                 }
 781         }
 782 }
 783
 784 static void schedule_init(struct cardstate *cs, int state)
 785 {
 786         if (cs->at_state.pending_commands & PC_INIT) {
 787                 gig_dbg(DEBUG_CMD, "not scheduling PC_INIT again");
 788                 return;
 789         }
 790         cs->mstate = state;
 791         cs->mode = M_UNKNOWN;
 792         gigaset_block_channels(cs);
 793         cs->at_state.pending_commands |= PC_INIT;
 794         cs->commands_pending = 1;
 795         gig_dbg(DEBUG_CMD, "Scheduling PC_INIT");
 796 }
 797
 798 /* Add "AT" to a command, add the cid, dle encode it, send the result to the
 799    hardware. */
 800 static void send_command(struct cardstate *cs, const char *cmd, int cid,
 801                          int dle, gfp_t kmallocflags)
 802 {
 803         size_t cmdlen, buflen;
 804         char *cmdpos, *cmdbuf, *cmdtail;
 805
 806         cmdlen = strlen(cmd);
 807         buflen = 11 + cmdlen;
 808         if (unlikely(buflen <= cmdlen)) {
 809                 dev_err(cs->dev, "integer overflow in buflen\n");
 810                 return;
 811         }
 812
 813         cmdbuf = kmalloc(buflen, kmallocflags);
 814         if (unlikely(!cmdbuf)) {
 815                 dev_err(cs->dev, "out of memory\n");
 816                 return;
 817         }
 818
 819         cmdpos = cmdbuf + 9;
 820         cmdtail = cmdpos + cmdlen;
 821         memcpy(cmdpos, cmd, cmdlen);
 822
 823         if (cid > 0 && cid <= 65535) {
 824                 do {
 825                         *--cmdpos = '0' + cid % 10;
 826                         cid /= 10;
 827                         ++cmdlen;
 828                 } while (cid);
 829         }
 830
 831         cmdlen += 2;
 832         *--cmdpos = 'T';
 833         *--cmdpos = 'A';
 834
 835         if (dle) {
 836                 cmdlen += 4;
 837                 *--cmdpos = '(';
 838                 *--cmdpos = 0x10;
 839                 *cmdtail++ = 0x10;
 840                 *cmdtail++ = ')';
 841         }
 842
 843         cs->ops->write_cmd(cs, cmdpos, cmdlen, NULL);
 844         kfree(cmdbuf);
 845 }
 846
 847 static struct at_state_t *at_state_from_cid(struct cardstate *cs, int cid)
 848 {
 849         struct at_state_t *at_state;
 850         int i;
 851         unsigned long flags;
 852
 853         if (cid == 0)
 854                 return &cs->at_state;
 855
 856         for (i = 0; i < cs->channels; ++i)
 857                 if (cid == cs->bcs[i].at_state.cid)
 858                         return &cs->bcs[i].at_state;
 859
 860         spin_lock_irqsave(&cs->lock, flags);
 861
 862         list_for_each_entry(at_state, &cs->temp_at_states, list)
 863                 if (cid == at_state->cid) {
 864                         spin_unlock_irqrestore(&cs->lock, flags);
 865                         return at_state;
 866                 }
 867
 868         spin_unlock_irqrestore(&cs->lock, flags);
 869
 870         return NULL;
 871 }
 872
 873 static void bchannel_down(struct bc_state *bcs)
 874 {
 875         if (bcs->chstate & CHS_B_UP) {
 876                 bcs->chstate &= ~CHS_B_UP;
 877                 gigaset_isdn_hupB(bcs);
 878         }
 879
 880         if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
 881                 bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
 882                 gigaset_isdn_hupD(bcs);
 883         }
 884
 885         gigaset_free_channel(bcs);
 886
 887         gigaset_bcs_reinit(bcs);
 888 }
 889
 890 static void bchannel_up(struct bc_state *bcs)
 891 {
 892         if (bcs->chstate & CHS_B_UP) {
 893                 dev_notice(bcs->cs->dev, "%s: B channel already up\n",
 894                            __func__);
 895                 return;
 896         }
 897
 898         bcs->chstate |= CHS_B_UP;
 899         gigaset_isdn_connB(bcs);
 900 }
 901
 902 static void start_dial(struct at_state_t *at_state, void *data,
 903                         unsigned seq_index)
 904 {
 905         struct bc_state *bcs = at_state->bcs;
 906         struct cardstate *cs = at_state->cs;
 907         char **commands = data;
 908         unsigned long flags;
 909         int i;
 910
 911         bcs->chstate |= CHS_NOTIFY_LL;
 912
 913         spin_lock_irqsave(&cs->lock, flags);
 914         if (at_state->seq_index != seq_index) {
 915                 spin_unlock_irqrestore(&cs->lock, flags);
 916                 goto error;
 917         }
 918         spin_unlock_irqrestore(&cs->lock, flags);
 919
 920         for (i = 0; i < AT_NUM; ++i) {
 921                 kfree(bcs->commands[i]);
 922                 bcs->commands[i] = commands[i];
 923         }
 924
 925         at_state->pending_commands |= PC_CID;
 926         gig_dbg(DEBUG_CMD, "Scheduling PC_CID");
 927         cs->commands_pending = 1;
 928         return;
 929
 930 error:
 931         for (i = 0; i < AT_NUM; ++i) {
 932                 kfree(commands[i]);
 933                 commands[i] = NULL;
 934         }
 935         at_state->pending_commands |= PC_NOCID;
 936         gig_dbg(DEBUG_CMD, "Scheduling PC_NOCID");
 937         cs->commands_pending = 1;
 938         return;
 939 }
 940
 941 static void start_accept(struct at_state_t *at_state)
 942 {
 943         struct cardstate *cs = at_state->cs;
 944         struct bc_state *bcs = at_state->bcs;
 945         int i;
 946
 947         for (i = 0; i < AT_NUM; ++i) {
 948                 kfree(bcs->commands[i]);
 949                 bcs->commands[i] = NULL;
 950         }
 951
 952         bcs->commands[AT_PROTO] = kmalloc(9, GFP_ATOMIC);
 953         bcs->commands[AT_ISO] = kmalloc(9, GFP_ATOMIC);
 954         if (!bcs->commands[AT_PROTO] || !bcs->commands[AT_ISO]) {
 955                 dev_err(at_state->cs->dev, "out of memory\n");
 956                 /* error reset */
 957                 at_state->pending_commands |= PC_HUP;
 958                 gig_dbg(DEBUG_CMD, "Scheduling PC_HUP");
 959                 cs->commands_pending = 1;
 960                 return;
 961         }
 962
 963         snprintf(bcs->commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
 964         snprintf(bcs->commands[AT_ISO], 9, "^SISO=%u\r", bcs->channel + 1);
 965
 966         at_state->pending_commands |= PC_ACCEPT;
 967         gig_dbg(DEBUG_CMD, "Scheduling PC_ACCEPT");
 968         cs->commands_pending = 1;
 969 }
 970
 971 static void do_start(struct cardstate *cs)
 972 {
 973         gigaset_free_channels(cs);
 974
 975         if (cs->mstate != MS_LOCKED)
 976                 schedule_init(cs, MS_INIT);
 977
 978         cs->isdn_up = 1;
 979         gigaset_isdn_start(cs);
 980
 981         cs->waiting = 0;
 982         wake_up(&cs->waitqueue);
 983 }
 984
 985 static void finish_shutdown(struct cardstate *cs)
 986 {
 987         if (cs->mstate != MS_LOCKED) {
 988                 cs->mstate = MS_UNINITIALIZED;
 989                 cs->mode = M_UNKNOWN;
 990         }
 991
 992         /* Tell the LL that the device is not available .. */
 993         if (cs->isdn_up) {
 994                 cs->isdn_up = 0;
 995                 gigaset_isdn_stop(cs);
 996         }
 997
 998         /* The rest is done by cleanup_cs () in user mode. */
 999
1000         cs->cmd_result = -ENODEV;
1001         cs->waiting = 0;
1002         wake_up(&cs->waitqueue);
1003 }
1004
1005 static void do_shutdown(struct cardstate *cs)
1006 {
1007         gigaset_block_channels(cs);
1008
1009         if (cs->mstate == MS_READY) {
1010                 cs->mstate = MS_SHUTDOWN;
1011                 cs->at_state.pending_commands |= PC_SHUTDOWN;
1012                 cs->commands_pending = 1;
1013                 gig_dbg(DEBUG_CMD, "Scheduling PC_SHUTDOWN");
1014         } else
1015                 finish_shutdown(cs);
1016 }
1017
1018 static void do_stop(struct cardstate *cs)
1019 {
1020         unsigned long flags;
1021
1022         spin_lock_irqsave(&cs->lock, flags);
1023         cs->connected = 0;
1024         spin_unlock_irqrestore(&cs->lock, flags);
1025
1026         do_shutdown(cs);
1027 }
1028
1029 /* Entering cid mode or getting a cid failed:
1030  * try to initialize the device and try again.
1031  *
1032  * channel >= 0: getting cid for the channel failed
1033  * channel < 0:  entering cid mode failed
1034  *
1035  * returns 0 on failure
1036  */
1037 static int reinit_and_retry(struct cardstate *cs, int channel)
1038 {
1039         int i;
1040
1041         if (--cs->retry_count <= 0)
1042                 return 0;
1043
1044         for (i = 0; i < cs->channels; ++i)
1045                 if (cs->bcs[i].at_state.cid > 0)
1046                         return 0;
1047
1048         if (channel < 0)
1049                 dev_warn(cs->dev,
1050                     "Could not enter cid mode. Reinit device and try again.\n");
1051         else {
1052                 dev_warn(cs->dev,
1053                     "Could not get a call id. Reinit device and try again.\n");
1054                 cs->bcs[channel].at_state.pending_commands |= PC_CID;
1055         }
1056         schedule_init(cs, MS_INIT);
1057         return 1;
1058 }
1059
1060 static int at_state_invalid(struct cardstate *cs,
1061                             struct at_state_t *test_ptr)
1062 {
1063         unsigned long flags;
1064         unsigned channel;
1065         struct at_state_t *at_state;
1066         int retval = 0;
1067
1068         spin_lock_irqsave(&cs->lock, flags);
1069
1070         if (test_ptr == &cs->at_state)
1071                 goto exit;
1072
1073         list_for_each_entry(at_state, &cs->temp_at_states, list)
1074                 if (at_state == test_ptr)
1075                         goto exit;
1076
1077         for (channel = 0; channel < cs->channels; ++channel)
1078                 if (&cs->bcs[channel].at_state == test_ptr)
1079                         goto exit;
1080
1081         retval = 1;
1082 exit:
1083         spin_unlock_irqrestore(&cs->lock, flags);
1084         return retval;
1085 }
1086
1087 static void handle_icall(struct cardstate *cs, struct bc_state *bcs,
1088                          struct at_state_t **p_at_state)
1089 {
1090         int retval;
1091         struct at_state_t *at_state = *p_at_state;
1092
1093         retval = gigaset_isdn_icall(at_state);
1094         switch (retval) {
1095         case ICALL_ACCEPT:
1096                 break;
1097         default:
1098                 dev_err(cs->dev, "internal error: disposition=%d\n", retval);
1099                 /* --v-- fall through --v-- */
1100         case ICALL_IGNORE:
1101         case ICALL_REJECT:
1102                 /* hang up actively
1103                  * Device doc says that would reject the call.
1104                  * In fact it doesn't.
1105                  */
1106                 at_state->pending_commands |= PC_HUP;
1107                 cs->commands_pending = 1;
1108                 break;
1109         }
1110 }
1111
1112 static int do_lock(struct cardstate *cs)
1113 {
1114         int mode;
1115         int i;
1116
1117         switch (cs->mstate) {
1118         case MS_UNINITIALIZED:
1119         case MS_READY:
1120                 if (cs->cur_at_seq || !list_empty(&cs->temp_at_states) ||
1121                     cs->at_state.pending_commands)
1122                         return -EBUSY;
1123
1124                 for (i = 0; i < cs->channels; ++i)
1125                         if (cs->bcs[i].at_state.pending_commands)
1126                                 return -EBUSY;
1127
1128                 if (!gigaset_get_channels(cs))
1129                         return -EBUSY;
1130
1131                 break;
1132         case MS_LOCKED:
1133                 break;
1134         default:
1135                 return -EBUSY;
1136         }
1137
1138         mode = cs->mode;
1139         cs->mstate = MS_LOCKED;
1140         cs->mode = M_UNKNOWN;
1141
1142         return mode;
1143 }
1144
1145 static int do_unlock(struct cardstate *cs)
1146 {
1147         if (cs->mstate != MS_LOCKED)
1148                 return -EINVAL;
1149
1150         cs->mstate = MS_UNINITIALIZED;
1151         cs->mode = M_UNKNOWN;
1152         gigaset_free_channels(cs);
1153         if (cs->connected)
1154                 schedule_init(cs, MS_INIT);
1155
1156         return 0;
1157 }
1158
1159 static void do_action(int action, struct cardstate *cs,
1160                       struct bc_state *bcs,
1161                       struct at_state_t **p_at_state, char **pp_command,
1162                       int *p_genresp, int *p_resp_code,
1163                       struct event_t *ev)
1164 {
1165         struct at_state_t *at_state = *p_at_state;
1166         struct at_state_t *at_state2;
1167         unsigned long flags;
1168
1169         int channel;
1170
1171         unsigned char *s, *e;
1172         int i;
1173         unsigned long val;
1174
1175         switch (action) {
1176         case ACT_NOTHING:
1177                 break;
1178         case ACT_TIMEOUT:
1179                 at_state->waiting = 1;
1180                 break;
1181         case ACT_INIT:
1182                 cs->at_state.pending_commands &= ~PC_INIT;
1183                 cs->cur_at_seq = SEQ_NONE;
1184                 cs->mode = M_UNIMODEM;
1185                 spin_lock_irqsave(&cs->lock, flags);
1186                 if (!cs->cidmode) {
1187                         spin_unlock_irqrestore(&cs->lock, flags);
1188                         gigaset_free_channels(cs);
1189                         cs->mstate = MS_READY;
1190                         break;
1191                 }
1192                 spin_unlock_irqrestore(&cs->lock, flags);
1193                 cs->at_state.pending_commands |= PC_CIDMODE;
1194                 cs->commands_pending = 1;
1195                 gig_dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
1196                 break;
1197         case ACT_FAILINIT:
1198                 dev_warn(cs->dev, "Could not initialize the device.\n");
1199                 cs->dle = 0;
1200                 init_failed(cs, M_UNKNOWN);
1201                 cs->cur_at_seq = SEQ_NONE;
1202                 break;
1203         case ACT_CONFIGMODE:
1204                 init_failed(cs, M_CONFIG);
1205                 cs->cur_at_seq = SEQ_NONE;
1206                 break;
1207         case ACT_SETDLE1:
1208                 cs->dle = 1;
1209                 /* cs->inbuf[0].inputstate |= INS_command | INS_DLE_command; */
1210                 cs->inbuf[0].inputstate &=
1211                         ~(INS_command | INS_DLE_command);
1212                 break;
1213         case ACT_SETDLE0:
1214                 cs->dle = 0;
1215                 cs->inbuf[0].inputstate =
1216                         (cs->inbuf[0].inputstate & ~INS_DLE_command)
1217                         | INS_command;
1218                 break;
1219         case ACT_CMODESET:
1220                 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1221                         gigaset_free_channels(cs);
1222                         cs->mstate = MS_READY;
1223                 }
1224                 cs->mode = M_CID;
1225                 cs->cur_at_seq = SEQ_NONE;
1226                 break;
1227         case ACT_UMODESET:
1228                 cs->mode = M_UNIMODEM;
1229                 cs->cur_at_seq = SEQ_NONE;
1230                 break;
1231         case ACT_FAILCMODE:
1232                 cs->cur_at_seq = SEQ_NONE;
1233                 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1234                         init_failed(cs, M_UNKNOWN);
1235                         break;
1236                 }
1237                 if (!reinit_and_retry(cs, -1))
1238                         schedule_init(cs, MS_RECOVER);
1239                 break;
1240         case ACT_FAILUMODE:
1241                 cs->cur_at_seq = SEQ_NONE;
1242                 schedule_init(cs, MS_RECOVER);
1243                 break;
1244         case ACT_HUPMODEM:
1245                 /* send "+++" (hangup in unimodem mode) */
1246                 if (cs->connected)
1247                         cs->ops->write_cmd(cs, "+++", 3, NULL);
1248                 break;
1249         case ACT_RING:
1250                 /* get fresh AT state structure for new CID */
1251                 at_state2 = get_free_channel(cs, ev->parameter);
1252                 if (!at_state2) {
1253                         dev_warn(cs->dev,
1254                         "RING ignored: could not allocate channel structure\n");
1255                         break;
1256                 }
1257
1258                 /* initialize AT state structure
1259                  * note that bcs may be NULL if no B channel is free
1260                  */
1261                 at_state2->ConState = 700;
1262                 kfree(at_state2->str_var[STR_NMBR]);
1263                 at_state2->str_var[STR_NMBR] = NULL;
1264                 kfree(at_state2->str_var[STR_ZCPN]);
1265                 at_state2->str_var[STR_ZCPN] = NULL;
1266                 kfree(at_state2->str_var[STR_ZBC]);
1267                 at_state2->str_var[STR_ZBC] = NULL;
1268                 kfree(at_state2->str_var[STR_ZHLC]);
1269                 at_state2->str_var[STR_ZHLC] = NULL;
1270                 at_state2->int_var[VAR_ZCTP] = -1;
1271
1272                 spin_lock_irqsave(&cs->lock, flags);
1273                 at_state2->timer_expires = RING_TIMEOUT;
1274                 at_state2->timer_active = 1;
1275                 spin_unlock_irqrestore(&cs->lock, flags);
1276                 break;
1277         case ACT_ICALL:
1278                 handle_icall(cs, bcs, p_at_state);
1279                 break;
1280         case ACT_FAILSDOWN:
1281                 dev_warn(cs->dev, "Could not shut down the device.\n");
1282                 /* fall through */
1283         case ACT_FAKESDOWN:
1284         case ACT_SDOWN:
1285                 cs->cur_at_seq = SEQ_NONE;
1286                 finish_shutdown(cs);
1287                 break;
1288         case ACT_CONNECT:
1289                 if (cs->onechannel) {
1290                         at_state->pending_commands |= PC_DLE1;
1291                         cs->commands_pending = 1;
1292                         break;
1293                 }
1294                 bcs->chstate |= CHS_D_UP;
1295                 gigaset_isdn_connD(bcs);
1296                 cs->ops->init_bchannel(bcs);
1297                 break;
1298         case ACT_DLE1:
1299                 cs->cur_at_seq = SEQ_NONE;
1300                 bcs = cs->bcs + cs->curchannel;
1301
1302                 bcs->chstate |= CHS_D_UP;
1303                 gigaset_isdn_connD(bcs);
1304                 cs->ops->init_bchannel(bcs);
1305                 break;
1306         case ACT_FAKEHUP:
1307                 at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
1308                 /* fall through */
1309         case ACT_DISCONNECT:
1310                 cs->cur_at_seq = SEQ_NONE;
1311                 at_state->cid = -1;
1312                 if (bcs && cs->onechannel && cs->dle) {
1313                         /* Check for other open channels not needed:
1314                          * DLE only used for M10x with one B channel.
1315                          */
1316                         at_state->pending_commands |= PC_DLE0;
1317                         cs->commands_pending = 1;
1318                 } else
1319                         disconnect(p_at_state);
1320                 break;
1321         case ACT_FAKEDLE0:
1322                 at_state->int_var[VAR_ZDLE] = 0;
1323                 cs->dle = 0;
1324                 /* fall through */
1325         case ACT_DLE0:
1326                 cs->cur_at_seq = SEQ_NONE;
1327                 at_state2 = &cs->bcs[cs->curchannel].at_state;
1328                 disconnect(&at_state2);
1329                 break;
1330         case ACT_ABORTHUP:
1331                 cs->cur_at_seq = SEQ_NONE;
1332                 dev_warn(cs->dev, "Could not hang up.\n");
1333                 at_state->cid = -1;
1334                 if (bcs && cs->onechannel)
1335                         at_state->pending_commands |= PC_DLE0;
1336                 else
1337                         disconnect(p_at_state);
1338                 schedule_init(cs, MS_RECOVER);
1339                 break;
1340         case ACT_FAILDLE0:
1341                 cs->cur_at_seq = SEQ_NONE;
1342                 dev_warn(cs->dev, "Could not leave DLE mode.\n");
1343                 at_state2 = &cs->bcs[cs->curchannel].at_state;
1344                 disconnect(&at_state2);
1345                 schedule_init(cs, MS_RECOVER);
1346                 break;
1347         case ACT_FAILDLE1:
1348                 cs->cur_at_seq = SEQ_NONE;
1349                 dev_warn(cs->dev,
1350                          "Could not enter DLE mode. Trying to hang up.\n");
1351                 channel = cs->curchannel;
1352                 cs->bcs[channel].at_state.pending_commands |= PC_HUP;
1353                 cs->commands_pending = 1;
1354                 break;
1355
1356         case ACT_CID: /* got cid; start dialing */
1357                 cs->cur_at_seq = SEQ_NONE;
1358                 channel = cs->curchannel;
1359                 if (ev->parameter > 0 && ev->parameter <= 65535) {
1360                         cs->bcs[channel].at_state.cid = ev->parameter;
1361                         cs->bcs[channel].at_state.pending_commands |=
1362                                 PC_DIAL;
1363                         cs->commands_pending = 1;
1364                         break;
1365                 }
1366                 /* fall through */
1367         case ACT_FAILCID:
1368                 cs->cur_at_seq = SEQ_NONE;
1369                 channel = cs->curchannel;
1370                 if (!reinit_and_retry(cs, channel)) {
1371                         dev_warn(cs->dev,
1372                                  "Could not get a call ID. Cannot dial.\n");
1373                         at_state2 = &cs->bcs[channel].at_state;
1374                         disconnect(&at_state2);
1375                 }
1376                 break;
1377         case ACT_ABORTCID:
1378                 cs->cur_at_seq = SEQ_NONE;
1379                 at_state2 = &cs->bcs[cs->curchannel].at_state;
1380                 disconnect(&at_state2);
1381                 break;
1382
1383         case ACT_DIALING:
1384         case ACT_ACCEPTED:
1385                 cs->cur_at_seq = SEQ_NONE;
1386                 break;
1387
1388         case ACT_ABORTACCEPT:   /* hangup/error/timeout during ICALL procssng */
1389                 disconnect(p_at_state);
1390                 break;
1391
1392         case ACT_ABORTDIAL:     /* error/timeout during dial preparation */
1393                 cs->cur_at_seq = SEQ_NONE;
1394                 at_state->pending_commands |= PC_HUP;
1395                 cs->commands_pending = 1;
1396                 break;
1397
1398         case ACT_REMOTEREJECT:  /* DISCONNECT_IND after dialling */
1399         case ACT_CONNTIMEOUT:   /* timeout waiting for ZSAU=ACTIVE */
1400         case ACT_REMOTEHUP:     /* DISCONNECT_IND with established connection */
1401                 at_state->pending_commands |= PC_HUP;
1402                 cs->commands_pending = 1;
1403                 break;
1404         case ACT_GETSTRING: /* warning: RING, ZDLE, ...
1405                                are not handled properly anymore */
1406                 at_state->getstring = 1;
1407                 break;
1408         case ACT_SETVER:
1409                 if (!ev->ptr) {
1410                         *p_genresp = 1;
1411                         *p_resp_code = RSP_ERROR;
1412                         break;
1413                 }
1414                 s = ev->ptr;
1415
1416                 if (!strcmp(s, "OK")) {
1417                         *p_genresp = 1;
1418                         *p_resp_code = RSP_ERROR;
1419                         break;
1420                 }
1421
1422                 for (i = 0; i < 4; ++i) {
1423                         val = simple_strtoul(s, (char **) &e, 10);
1424                         if (val > INT_MAX || e == s)
1425                                 break;
1426                         if (i == 3) {
1427                                 if (*e)
1428                                         break;
1429                         } else if (*e != '.')
1430                                 break;
1431                         else
1432                                 s = e + 1;
1433                         cs->fwver[i] = val;
1434                 }
1435                 if (i != 4) {
1436                         *p_genresp = 1;
1437                         *p_resp_code = RSP_ERROR;
1438                         break;
1439                 }
1440                 /*at_state->getstring = 1;*/
1441                 cs->gotfwver = 0;
1442                 break;
1443         case ACT_GOTVER:
1444                 if (cs->gotfwver == 0) {
1445                         cs->gotfwver = 1;
1446                         gig_dbg(DEBUG_ANY,
1447                                 "firmware version %02d.%03d.%02d.%02d",
1448                                 cs->fwver[0], cs->fwver[1],
1449                                 cs->fwver[2], cs->fwver[3]);
1450                         break;
1451                 }
1452                 /* fall through */
1453         case ACT_FAILVER:
1454                 cs->gotfwver = -1;
1455                 dev_err(cs->dev, "could not read firmware version.\n");
1456                 break;
1457         case ACT_ERROR:
1458                 gig_dbg(DEBUG_ANY, "%s: ERROR response in ConState %d",
1459                         __func__, at_state->ConState);
1460                 cs->cur_at_seq = SEQ_NONE;
1461                 break;
1462         case ACT_DEBUG:
1463                 gig_dbg(DEBUG_ANY, "%s: resp_code %d in ConState %d",
1464                         __func__, ev->type, at_state->ConState);
1465                 break;
1466         case ACT_WARN:
1467                 dev_warn(cs->dev, "%s: resp_code %d in ConState %d!\n",
1468                          __func__, ev->type, at_state->ConState);
1469                 break;
1470         case ACT_ZCAU:
1471                 dev_warn(cs->dev, "cause code %04x in connection state %d.\n",
1472                          ev->parameter, at_state->ConState);
1473                 break;
1474
1475         /* events from the LL */
1476         case ACT_DIAL:
1477                 start_dial(at_state, ev->ptr, ev->parameter);
1478                 break;
1479         case ACT_ACCEPT:
1480                 start_accept(at_state);
1481                 break;
1482         case ACT_HUP:
1483                 at_state->pending_commands |= PC_HUP;
1484                 cs->commands_pending = 1;
1485                 gig_dbg(DEBUG_CMD, "Scheduling PC_HUP");
1486                 break;
1487
1488         /* hotplug events */
1489         case ACT_STOP:
1490                 do_stop(cs);
1491                 break;
1492         case ACT_START:
1493                 do_start(cs);
1494                 break;
1495
1496         /* events from the interface */
1497         case ACT_IF_LOCK:
1498                 cs->cmd_result = ev->parameter ? do_lock(cs) : do_unlock(cs);
1499                 cs->waiting = 0;
1500                 wake_up(&cs->waitqueue);
1501                 break;
1502         case ACT_IF_VER:
1503                 if (ev->parameter != 0)
1504                         cs->cmd_result = -EINVAL;
1505                 else if (cs->gotfwver != 1) {
1506                         cs->cmd_result = -ENOENT;
1507                 } else {
1508                         memcpy(ev->arg, cs->fwver, sizeof cs->fwver);
1509                         cs->cmd_result = 0;
1510                 }
1511                 cs->waiting = 0;
1512                 wake_up(&cs->waitqueue);
1513                 break;
1514
1515         /* events from the proc file system */
1516         case ACT_PROC_CIDMODE:
1517                 spin_lock_irqsave(&cs->lock, flags);
1518                 if (ev->parameter != cs->cidmode) {
1519                         cs->cidmode = ev->parameter;
1520                         if (ev->parameter) {
1521                                 cs->at_state.pending_commands |= PC_CIDMODE;
1522                                 gig_dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
1523                         } else {
1524                                 cs->at_state.pending_commands |= PC_UMMODE;
1525                                 gig_dbg(DEBUG_CMD, "Scheduling PC_UMMODE");
1526                         }
1527                         cs->commands_pending = 1;
1528                 }
1529                 spin_unlock_irqrestore(&cs->lock, flags);
1530                 cs->waiting = 0;
1531                 wake_up(&cs->waitqueue);
1532                 break;
1533
1534         /* events from the hardware drivers */
1535         case ACT_NOTIFY_BC_DOWN:
1536                 bchannel_down(bcs);
1537                 break;
1538         case ACT_NOTIFY_BC_UP:
1539                 bchannel_up(bcs);
1540                 break;
1541         case ACT_SHUTDOWN:
1542                 do_shutdown(cs);
1543                 break;
1544
1545
1546         default:
1547                 if (action >= ACT_CMD && action < ACT_CMD + AT_NUM) {
1548                         *pp_command = at_state->bcs->commands[action - ACT_CMD];
1549                         if (!*pp_command) {
1550                                 *p_genresp = 1;
1551                                 *p_resp_code = RSP_NULL;
1552                         }
1553                 } else
1554                         dev_err(cs->dev, "%s: action==%d!\n", __func__, action);
1555         }
1556 }
1557
1558 /* State machine to do the calling and hangup procedure */
1559 static void process_event(struct cardstate *cs, struct event_t *ev)
1560 {
1561         struct bc_state *bcs;
1562         char *p_command = NULL;
1563         struct reply_t *rep;
1564         int rcode;
1565         int genresp = 0;
1566         int resp_code = RSP_ERROR;
1567         int sendcid;
1568         struct at_state_t *at_state;
1569         int index;
1570         int curact;
1571         unsigned long flags;
1572
1573         if (ev->cid >= 0) {
1574                 at_state = at_state_from_cid(cs, ev->cid);
1575                 if (!at_state) {
1576                         gigaset_add_event(cs, &cs->at_state, RSP_WRONG_CID,
1577                                           NULL, 0, NULL);
1578                         return;
1579                 }
1580         } else {
1581                 at_state = ev->at_state;
1582                 if (at_state_invalid(cs, at_state)) {
1583                         gig_dbg(DEBUG_ANY, "event for invalid at_state %p",
1584                                 at_state);
1585                         return;
1586                 }
1587         }
1588
1589         gig_dbg(DEBUG_CMD, "connection state %d, event %d",
1590                 at_state->ConState, ev->type);
1591
1592         bcs = at_state->bcs;
1593         sendcid = at_state->cid;
1594
1595         /* Setting the pointer to the dial array */
1596         rep = at_state->replystruct;
1597
1598         spin_lock_irqsave(&cs->lock, flags);
1599         if (ev->type == EV_TIMEOUT) {
1600                 if (ev->parameter != at_state->timer_index
1601                     || !at_state->timer_active) {
1602                         ev->type = RSP_NONE; /* old timeout */
1603                         gig_dbg(DEBUG_ANY, "old timeout");
1604                 } else if (!at_state->waiting)
1605                         gig_dbg(DEBUG_ANY, "timeout occurred");
1606                 else
1607                         gig_dbg(DEBUG_ANY, "stopped waiting");
1608         }
1609         spin_unlock_irqrestore(&cs->lock, flags);
1610
1611         /* if the response belongs to a variable in at_state->int_var[VAR_XXXX]
1612            or at_state->str_var[STR_XXXX], set it */
1613         if (ev->type >= RSP_VAR && ev->type < RSP_VAR + VAR_NUM) {
1614                 index = ev->type - RSP_VAR;
1615                 at_state->int_var[index] = ev->parameter;
1616         } else if (ev->type >= RSP_STR && ev->type < RSP_STR + STR_NUM) {
1617                 index = ev->type - RSP_STR;
1618                 kfree(at_state->str_var[index]);
1619                 at_state->str_var[index] = ev->ptr;
1620                 ev->ptr = NULL; /* prevent process_events() from
1621                                    deallocating ptr */
1622         }
1623
1624         if (ev->type == EV_TIMEOUT || ev->type == RSP_STRING)
1625                 at_state->getstring = 0;
1626
1627         /* Search row in dial array which matches modem response and current
1628            constate */
1629         for (;; rep++) {
1630                 rcode = rep->resp_code;
1631                 if (rcode == RSP_LAST) {
1632                         /* found nothing...*/
1633                         dev_warn(cs->dev, "%s: rcode=RSP_LAST: "
1634                                         "resp_code %d in ConState %d!\n",
1635                                  __func__, ev->type, at_state->ConState);
1636                         return;
1637                 }
1638                 if ((rcode == RSP_ANY || rcode == ev->type)
1639                   && ((int) at_state->ConState >= rep->min_ConState)
1640                   && (rep->max_ConState < 0
1641                       || (int) at_state->ConState <= rep->max_ConState)
1642                   && (rep->parameter < 0 || rep->parameter == ev->parameter))
1643                         break;
1644         }
1645
1646         p_command = rep->command;
1647
1648         at_state->waiting = 0;
1649         for (curact = 0; curact < MAXACT; ++curact) {
1650                 /* The row tells us what we should do  ..
1651                  */
1652                 do_action(rep->action[curact], cs, bcs, &at_state, &p_command,
1653                           &genresp, &resp_code, ev);
1654                 if (!at_state)
1655                         break; /* may be freed after disconnect */
1656         }
1657
1658         if (at_state) {
1659                 /* Jump to the next con-state regarding the array */
1660                 if (rep->new_ConState >= 0)
1661                         at_state->ConState = rep->new_ConState;
1662
1663                 if (genresp) {
1664                         spin_lock_irqsave(&cs->lock, flags);
1665                         at_state->timer_expires = 0;
1666                         at_state->timer_active = 0;
1667                         spin_unlock_irqrestore(&cs->lock, flags);
1668                         gigaset_add_event(cs, at_state, resp_code,
1669                                           NULL, 0, NULL);
1670                 } else {
1671                         /* Send command to modem if not NULL... */
1672                         if (p_command) {
1673                                 if (cs->connected)
1674                                         send_command(cs, p_command,
1675                                                      sendcid, cs->dle,
1676                                                      GFP_ATOMIC);
1677                                 else
1678                                         gigaset_add_event(cs, at_state,
1679                                                           RSP_NODEV,
1680                                                           NULL, 0, NULL);
1681                         }
1682
1683                         spin_lock_irqsave(&cs->lock, flags);
1684                         if (!rep->timeout) {
1685                                 at_state->timer_expires = 0;
1686                                 at_state->timer_active = 0;
1687                         } else if (rep->timeout > 0) { /* new timeout */
1688                                 at_state->timer_expires = rep->timeout * 10;
1689                                 at_state->timer_active = 1;
1690                                 ++at_state->timer_index;
1691                         }
1692                         spin_unlock_irqrestore(&cs->lock, flags);
1693                 }
1694         }
1695 }
1696
1697 static void schedule_sequence(struct cardstate *cs,
1698                               struct at_state_t *at_state, int sequence)
1699 {
1700         cs->cur_at_seq = sequence;
1701         gigaset_add_event(cs, at_state, RSP_INIT, NULL, sequence, NULL);
1702 }
1703
1704 static void process_command_flags(struct cardstate *cs)
1705 {
1706         struct at_state_t *at_state = NULL;
1707         struct bc_state *bcs;
1708         int i;
1709         int sequence;
1710         unsigned long flags;
1711
1712         cs->commands_pending = 0;
1713
1714         if (cs->cur_at_seq) {
1715                 gig_dbg(DEBUG_CMD, "not searching scheduled commands: busy");
1716                 return;
1717         }
1718
1719         gig_dbg(DEBUG_CMD, "searching scheduled commands");
1720
1721         sequence = SEQ_NONE;
1722
1723         /* clear pending_commands and hangup channels on shutdown */
1724         if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1725                 cs->at_state.pending_commands &= ~PC_CIDMODE;
1726                 for (i = 0; i < cs->channels; ++i) {
1727                         bcs = cs->bcs + i;
1728                         at_state = &bcs->at_state;
1729                         at_state->pending_commands &=
1730                                 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1731                         if (at_state->cid > 0)
1732                                 at_state->pending_commands |= PC_HUP;
1733                         if (at_state->pending_commands & PC_CID) {
1734                                 at_state->pending_commands |= PC_NOCID;
1735                                 at_state->pending_commands &= ~PC_CID;
1736                         }
1737                 }
1738         }
1739
1740         /* clear pending_commands and hangup channels on reset */
1741         if (cs->at_state.pending_commands & PC_INIT) {
1742                 cs->at_state.pending_commands &= ~PC_CIDMODE;
1743                 for (i = 0; i < cs->channels; ++i) {
1744                         bcs = cs->bcs + i;
1745                         at_state = &bcs->at_state;
1746                         at_state->pending_commands &=
1747                                 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1748                         if (at_state->cid > 0)
1749                                 at_state->pending_commands |= PC_HUP;
1750                         if (cs->mstate == MS_RECOVER) {
1751                                 if (at_state->pending_commands & PC_CID) {
1752                                         at_state->pending_commands |= PC_NOCID;
1753                                         at_state->pending_commands &= ~PC_CID;
1754                                 }
1755                         }
1756                 }
1757         }
1758
1759         /* only switch back to unimodem mode if no commands are pending and
1760          * no channels are up */
1761         spin_lock_irqsave(&cs->lock, flags);
1762         if (cs->at_state.pending_commands == PC_UMMODE
1763             && !cs->cidmode
1764             && list_empty(&cs->temp_at_states)
1765             && cs->mode == M_CID) {
1766                 sequence = SEQ_UMMODE;
1767                 at_state = &cs->at_state;
1768                 for (i = 0; i < cs->channels; ++i) {
1769                         bcs = cs->bcs + i;
1770                         if (bcs->at_state.pending_commands ||
1771                             bcs->at_state.cid > 0) {
1772                                 sequence = SEQ_NONE;
1773                                 break;
1774                         }
1775                 }
1776         }
1777         spin_unlock_irqrestore(&cs->lock, flags);
1778         cs->at_state.pending_commands &= ~PC_UMMODE;
1779         if (sequence != SEQ_NONE) {
1780                 schedule_sequence(cs, at_state, sequence);
1781                 return;
1782         }
1783
1784         for (i = 0; i < cs->channels; ++i) {
1785                 bcs = cs->bcs + i;
1786                 if (bcs->at_state.pending_commands & PC_HUP) {
1787                         bcs->at_state.pending_commands &= ~PC_HUP;
1788                         if (bcs->at_state.pending_commands & PC_CID) {
1789                                 /* not yet dialing: PC_NOCID is sufficient */
1790                                 bcs->at_state.pending_commands |= PC_NOCID;
1791                                 bcs->at_state.pending_commands &= ~PC_CID;
1792                         } else {
1793                                 schedule_sequence(cs, &bcs->at_state, SEQ_HUP);
1794                                 return;
1795                         }
1796                 }
1797                 if (bcs->at_state.pending_commands & PC_NOCID) {
1798                         bcs->at_state.pending_commands &= ~PC_NOCID;
1799                         cs->curchannel = bcs->channel;
1800                         schedule_sequence(cs, &cs->at_state, SEQ_NOCID);
1801                         return;
1802                 } else if (bcs->at_state.pending_commands & PC_DLE0) {
1803                         bcs->at_state.pending_commands &= ~PC_DLE0;
1804                         cs->curchannel = bcs->channel;
1805                         schedule_sequence(cs, &cs->at_state, SEQ_DLE0);
1806                         return;
1807                 }
1808         }
1809
1810         list_for_each_entry(at_state, &cs->temp_at_states, list)
1811                 if (at_state->pending_commands & PC_HUP) {
1812                         at_state->pending_commands &= ~PC_HUP;
1813                         schedule_sequence(cs, at_state, SEQ_HUP);
1814                         return;
1815                 }
1816
1817         if (cs->at_state.pending_commands & PC_INIT) {
1818                 cs->at_state.pending_commands &= ~PC_INIT;
1819                 cs->dle = 0;
1820                 cs->inbuf->inputstate = INS_command;
1821                 schedule_sequence(cs, &cs->at_state, SEQ_INIT);
1822                 return;
1823         }
1824         if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1825                 cs->at_state.pending_commands &= ~PC_SHUTDOWN;
1826                 schedule_sequence(cs, &cs->at_state, SEQ_SHUTDOWN);
1827                 return;
1828         }
1829         if (cs->at_state.pending_commands & PC_CIDMODE) {
1830                 cs->at_state.pending_commands &= ~PC_CIDMODE;
1831                 if (cs->mode == M_UNIMODEM) {
1832                         cs->retry_count = 1;
1833                         schedule_sequence(cs, &cs->at_state, SEQ_CIDMODE);
1834                         return;
1835                 }
1836         }
1837
1838         for (i = 0; i < cs->channels; ++i) {
1839                 bcs = cs->bcs + i;
1840                 if (bcs->at_state.pending_commands & PC_DLE1) {
1841                         bcs->at_state.pending_commands &= ~PC_DLE1;
1842                         cs->curchannel = bcs->channel;
1843                         schedule_sequence(cs, &cs->at_state, SEQ_DLE1);
1844                         return;
1845                 }
1846                 if (bcs->at_state.pending_commands & PC_ACCEPT) {
1847                         bcs->at_state.pending_commands &= ~PC_ACCEPT;
1848                         schedule_sequence(cs, &bcs->at_state, SEQ_ACCEPT);
1849                         return;
1850                 }
1851                 if (bcs->at_state.pending_commands & PC_DIAL) {
1852                         bcs->at_state.pending_commands &= ~PC_DIAL;
1853                         schedule_sequence(cs, &bcs->at_state, SEQ_DIAL);
1854                         return;
1855                 }
1856                 if (bcs->at_state.pending_commands & PC_CID) {
1857                         switch (cs->mode) {
1858                         case M_UNIMODEM:
1859                                 cs->at_state.pending_commands |= PC_CIDMODE;
1860                                 gig_dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
1861                                 cs->commands_pending = 1;
1862                                 return;
1863 #ifdef GIG_MAYINITONDIAL
1864                         case M_UNKNOWN:
1865                                 schedule_init(cs, MS_INIT);
1866                                 return;
1867 #endif
1868                         }
1869                         bcs->at_state.pending_commands &= ~PC_CID;
1870                         cs->curchannel = bcs->channel;
1871 #ifdef GIG_RETRYCID
1872                         cs->retry_count = 2;
1873 #else
1874                         cs->retry_count = 1;
1875 #endif
1876                         schedule_sequence(cs, &cs->at_state, SEQ_CID);
1877                         return;
1878                 }
1879         }
1880 }
1881
1882 static void process_events(struct cardstate *cs)
1883 {
1884         struct event_t *ev;
1885         unsigned head, tail;
1886         int i;
1887         int check_flags = 0;
1888         int was_busy;
1889         unsigned long flags;
1890
1891         spin_lock_irqsave(&cs->ev_lock, flags);
1892         head = cs->ev_head;
1893
1894         for (i = 0; i < 2 * MAX_EVENTS; ++i) {
1895                 tail = cs->ev_tail;
1896                 if (tail == head) {
1897                         if (!check_flags && !cs->commands_pending)
1898                                 break;
1899                         check_flags = 0;
1900                         spin_unlock_irqrestore(&cs->ev_lock, flags);
1901                         process_command_flags(cs);
1902                         spin_lock_irqsave(&cs->ev_lock, flags);
1903                         tail = cs->ev_tail;
1904                         if (tail == head) {
1905                                 if (!cs->commands_pending)
1906                                         break;
1907                                 continue;
1908                         }
1909                 }
1910
1911                 ev = cs->events + head;
1912                 was_busy = cs->cur_at_seq != SEQ_NONE;
1913                 spin_unlock_irqrestore(&cs->ev_lock, flags);
1914                 process_event(cs, ev);
1915                 spin_lock_irqsave(&cs->ev_lock, flags);
1916                 kfree(ev->ptr);
1917                 ev->ptr = NULL;
1918                 if (was_busy && cs->cur_at_seq == SEQ_NONE)
1919                         check_flags = 1;
1920
1921                 head = (head + 1) % MAX_EVENTS;
1922                 cs->ev_head = head;
1923         }
1924
1925         spin_unlock_irqrestore(&cs->ev_lock, flags);
1926
1927         if (i == 2 * MAX_EVENTS) {
1928                 dev_err(cs->dev,
1929                         "infinite loop in process_events; aborting.\n");
1930         }
1931 }
1932
1933 /* tasklet scheduled on any event received from the Gigaset device
1934  * parameter:
1935  *      data    ISDN controller state structure
1936  */
1937 void gigaset_handle_event(unsigned long data)
1938 {
1939         struct cardstate *cs = (struct cardstate *) data;
1940
1941         /* handle incoming data on control/common channel */
1942         if (cs->inbuf->head != cs->inbuf->tail) {
1943                 gig_dbg(DEBUG_INTR, "processing new data");
1944                 cs->ops->handle_input(cs->inbuf);
1945         }
1946
1947         process_events(cs);
1948 }