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call_function_many: fix list delete vs add race
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / isdn / gigaset / ev-layer.c
bloba14187605f5e477549b11143d5da129c55aec9b0
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_ZCAU 6
39
40 /* Possible ASCII responses */
41 #define RSP_OK 0
42 #define RSP_ERROR 1
43 #define RSP_ZGCI 3
44 #define RSP_RING 4
45 #define RSP_ZVLS 5
46 #define RSP_ZCAU 6
47
48 /* responses with values to store in at_state */
49 /* - numeric */
50 #define RSP_VAR 100
51 #define RSP_ZSAU (RSP_VAR + VAR_ZSAU)
52 #define RSP_ZDLE (RSP_VAR + VAR_ZDLE)
53 #define RSP_ZCTP (RSP_VAR + VAR_ZCTP)
54 /* - string */
55 #define RSP_STR (RSP_VAR + VAR_NUM)
56 #define RSP_NMBR (RSP_STR + STR_NMBR)
57 #define RSP_ZCPN (RSP_STR + STR_ZCPN)
58 #define RSP_ZCON (RSP_STR + STR_ZCON)
59 #define RSP_ZBC (RSP_STR + STR_ZBC)
60 #define RSP_ZHLC (RSP_STR + STR_ZHLC)
61
62 #define RSP_WRONG_CID -2 /* unknown cid in cmd */
63 #define RSP_INVAL -6 /* invalid response */
64 #define RSP_NODEV -9 /* device not connected */
65
66 #define RSP_NONE -19
67 #define RSP_STRING -20
68 #define RSP_NULL -21
69 #define RSP_INIT -27
70 #define RSP_ANY -26
71 #define RSP_LAST -28
72
73 /* actions for process_response */
74 #define ACT_NOTHING 0
75 #define ACT_SETDLE1 1
76 #define ACT_SETDLE0 2
77 #define ACT_FAILINIT 3
78 #define ACT_HUPMODEM 4
79 #define ACT_CONFIGMODE 5
80 #define ACT_INIT 6
81 #define ACT_DLE0 7
82 #define ACT_DLE1 8
83 #define ACT_FAILDLE0 9
84 #define ACT_FAILDLE1 10
85 #define ACT_RING 11
86 #define ACT_CID 12
87 #define ACT_FAILCID 13
88 #define ACT_SDOWN 14
89 #define ACT_FAILSDOWN 15
90 #define ACT_DEBUG 16
91 #define ACT_WARN 17
92 #define ACT_DIALING 18
93 #define ACT_ABORTDIAL 19
94 #define ACT_DISCONNECT 20
95 #define ACT_CONNECT 21
96 #define ACT_REMOTEREJECT 22
97 #define ACT_CONNTIMEOUT 23
98 #define ACT_REMOTEHUP 24
99 #define ACT_ABORTHUP 25
100 #define ACT_ICALL 26
101 #define ACT_ACCEPTED 27
102 #define ACT_ABORTACCEPT 28
103 #define ACT_TIMEOUT 29
104 #define ACT_GETSTRING 30
105 #define ACT_SETVER 31
106 #define ACT_FAILVER 32
107 #define ACT_GOTVER 33
108 #define ACT_TEST 34
109 #define ACT_ERROR 35
110 #define ACT_ABORTCID 36
111 #define ACT_ZCAU 37
112 #define ACT_NOTIFY_BC_DOWN 38
113 #define ACT_NOTIFY_BC_UP 39
114 #define ACT_DIAL 40
115 #define ACT_ACCEPT 41
116 #define ACT_HUP 43
117 #define ACT_IF_LOCK 44
118 #define ACT_START 45
119 #define ACT_STOP 46
120 #define ACT_FAKEDLE0 47
121 #define ACT_FAKEHUP 48
122 #define ACT_FAKESDOWN 49
123 #define ACT_SHUTDOWN 50
124 #define ACT_PROC_CIDMODE 51
125 #define ACT_UMODESET 52
126 #define ACT_FAILUMODE 53
127 #define ACT_CMODESET 54
128 #define ACT_FAILCMODE 55
129 #define ACT_IF_VER 56
130 #define ACT_CMD 100
131
132 /* at command sequences */
133 #define SEQ_NONE 0
134 #define SEQ_INIT 100
135 #define SEQ_DLE0 200
136 #define SEQ_DLE1 250
137 #define SEQ_CID 300
138 #define SEQ_NOCID 350
139 #define SEQ_HUP 400
140 #define SEQ_DIAL 600
141 #define SEQ_ACCEPT 720
142 #define SEQ_SHUTDOWN 500
143 #define SEQ_CIDMODE 10
144 #define SEQ_UMMODE 11
145
146
147 /* 100: init, 200: dle0, 250:dle1, 300: get cid (dial), 350: "hup" (no cid),
148 * 400: hup, 500: reset, 600: dial, 700: ring */
149 struct reply_t gigaset_tab_nocid[] =
150 {
151 /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout,
152 * action, command */
153
154 /* initialize device, set cid mode if possible */
155 {RSP_INIT, -1, -1, SEQ_INIT, 100, 1, {ACT_TIMEOUT} },
156
157 {EV_TIMEOUT, 100, 100, -1, 101, 3, {0}, "Z\r"},
158 {RSP_OK, 101, 103, -1, 120, 5, {ACT_GETSTRING},
159 "+GMR\r"},
160
161 {EV_TIMEOUT, 101, 101, -1, 102, 5, {0}, "Z\r"},
162 {RSP_ERROR, 101, 101, -1, 102, 5, {0}, "Z\r"},
163
164 {EV_TIMEOUT, 102, 102, -1, 108, 5, {ACT_SETDLE1},
165 "^SDLE=0\r"},
166 {RSP_OK, 108, 108, -1, 104, -1},
167 {RSP_ZDLE, 104, 104, 0, 103, 5, {0}, "Z\r"},
168 {EV_TIMEOUT, 104, 104, -1, 0, 0, {ACT_FAILINIT} },
169 {RSP_ERROR, 108, 108, -1, 0, 0, {ACT_FAILINIT} },
170
171 {EV_TIMEOUT, 108, 108, -1, 105, 2, {ACT_SETDLE0,
172 ACT_HUPMODEM,
173 ACT_TIMEOUT} },
174 {EV_TIMEOUT, 105, 105, -1, 103, 5, {0}, "Z\r"},
175
176 {RSP_ERROR, 102, 102, -1, 107, 5, {0}, "^GETPRE\r"},
177 {RSP_OK, 107, 107, -1, 0, 0, {ACT_CONFIGMODE} },
178 {RSP_ERROR, 107, 107, -1, 0, 0, {ACT_FAILINIT} },
179 {EV_TIMEOUT, 107, 107, -1, 0, 0, {ACT_FAILINIT} },
180
181 {RSP_ERROR, 103, 103, -1, 0, 0, {ACT_FAILINIT} },
182 {EV_TIMEOUT, 103, 103, -1, 0, 0, {ACT_FAILINIT} },
183
184 {RSP_STRING, 120, 120, -1, 121, -1, {ACT_SETVER} },
185
186 {EV_TIMEOUT, 120, 121, -1, 0, 0, {ACT_FAILVER,
187 ACT_INIT} },
188 {RSP_ERROR, 120, 121, -1, 0, 0, {ACT_FAILVER,
189 ACT_INIT} },
190 {RSP_OK, 121, 121, -1, 0, 0, {ACT_GOTVER,
191 ACT_INIT} },
192
193 /* leave dle mode */
194 {RSP_INIT, 0, 0, SEQ_DLE0, 201, 5, {0}, "^SDLE=0\r"},
195 {RSP_OK, 201, 201, -1, 202, -1},
196 {RSP_ZDLE, 202, 202, 0, 0, 0, {ACT_DLE0} },
197 {RSP_NODEV, 200, 249, -1, 0, 0, {ACT_FAKEDLE0} },
198 {RSP_ERROR, 200, 249, -1, 0, 0, {ACT_FAILDLE0} },
199 {EV_TIMEOUT, 200, 249, -1, 0, 0, {ACT_FAILDLE0} },
200
201 /* enter dle mode */
202 {RSP_INIT, 0, 0, SEQ_DLE1, 251, 5, {0}, "^SDLE=1\r"},
203 {RSP_OK, 251, 251, -1, 252, -1},
204 {RSP_ZDLE, 252, 252, 1, 0, 0, {ACT_DLE1} },
205 {RSP_ERROR, 250, 299, -1, 0, 0, {ACT_FAILDLE1} },
206 {EV_TIMEOUT, 250, 299, -1, 0, 0, {ACT_FAILDLE1} },
207
208 /* incoming call */
209 {RSP_RING, -1, -1, -1, -1, -1, {ACT_RING} },
210
211 /* get cid */
212 {RSP_INIT, 0, 0, SEQ_CID, 301, 5, {0}, "^SGCI?\r"},
213 {RSP_OK, 301, 301, -1, 302, -1},
214 {RSP_ZGCI, 302, 302, -1, 0, 0, {ACT_CID} },
215 {RSP_ERROR, 301, 349, -1, 0, 0, {ACT_FAILCID} },
216 {EV_TIMEOUT, 301, 349, -1, 0, 0, {ACT_FAILCID} },
217
218 /* enter cid mode */
219 {RSP_INIT, 0, 0, SEQ_CIDMODE, 150, 5, {0}, "^SGCI=1\r"},
220 {RSP_OK, 150, 150, -1, 0, 0, {ACT_CMODESET} },
221 {RSP_ERROR, 150, 150, -1, 0, 0, {ACT_FAILCMODE} },
222 {EV_TIMEOUT, 150, 150, -1, 0, 0, {ACT_FAILCMODE} },
223
224 /* leave cid mode */
225 {RSP_INIT, 0, 0, SEQ_UMMODE, 160, 5, {0}, "Z\r"},
226 {RSP_OK, 160, 160, -1, 0, 0, {ACT_UMODESET} },
227 {RSP_ERROR, 160, 160, -1, 0, 0, {ACT_FAILUMODE} },
228 {EV_TIMEOUT, 160, 160, -1, 0, 0, {ACT_FAILUMODE} },
229
230 /* abort getting cid */
231 {RSP_INIT, 0, 0, SEQ_NOCID, 0, 0, {ACT_ABORTCID} },
232
233 /* reset */
234 {RSP_INIT, 0, 0, SEQ_SHUTDOWN, 504, 5, {0}, "Z\r"},
235 {RSP_OK, 504, 504, -1, 0, 0, {ACT_SDOWN} },
236 {RSP_ERROR, 501, 599, -1, 0, 0, {ACT_FAILSDOWN} },
237 {EV_TIMEOUT, 501, 599, -1, 0, 0, {ACT_FAILSDOWN} },
238 {RSP_NODEV, 501, 599, -1, 0, 0, {ACT_FAKESDOWN} },
239
240 {EV_PROC_CIDMODE, -1, -1, -1, -1, -1, {ACT_PROC_CIDMODE} },
241 {EV_IF_LOCK, -1, -1, -1, -1, -1, {ACT_IF_LOCK} },
242 {EV_IF_VER, -1, -1, -1, -1, -1, {ACT_IF_VER} },
243 {EV_START, -1, -1, -1, -1, -1, {ACT_START} },
244 {EV_STOP, -1, -1, -1, -1, -1, {ACT_STOP} },
245 {EV_SHUTDOWN, -1, -1, -1, -1, -1, {ACT_SHUTDOWN} },
246
247 /* misc. */
248 {RSP_ERROR, -1, -1, -1, -1, -1, {ACT_ERROR} },
249 {RSP_ZCAU, -1, -1, -1, -1, -1, {ACT_ZCAU} },
250 {RSP_NONE, -1, -1, -1, -1, -1, {ACT_DEBUG} },
251 {RSP_ANY, -1, -1, -1, -1, -1, {ACT_WARN} },
252 {RSP_LAST}
253 };
254
255 /* 600: start dialing, 650: dial in progress, 800: connection is up, 700: ring,
256 * 400: hup, 750: accepted icall */
257 struct reply_t gigaset_tab_cid[] =
258 {
259 /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout,
260 * action, command */
261
262 /* dial */
263 {EV_DIAL, -1, -1, -1, -1, -1, {ACT_DIAL} },
264 {RSP_INIT, 0, 0, SEQ_DIAL, 601, 5, {ACT_CMD+AT_BC} },
265 {RSP_OK, 601, 601, -1, 603, 5, {ACT_CMD+AT_PROTO} },
266 {RSP_OK, 603, 603, -1, 604, 5, {ACT_CMD+AT_TYPE} },
267 {RSP_OK, 604, 604, -1, 605, 5, {ACT_CMD+AT_MSN} },
268 {RSP_NULL, 605, 605, -1, 606, 5, {ACT_CMD+AT_CLIP} },
269 {RSP_OK, 605, 605, -1, 606, 5, {ACT_CMD+AT_CLIP} },
270 {RSP_NULL, 606, 606, -1, 607, 5, {ACT_CMD+AT_ISO} },
271 {RSP_OK, 606, 606, -1, 607, 5, {ACT_CMD+AT_ISO} },
272 {RSP_OK, 607, 607, -1, 608, 5, {0}, "+VLS=17\r"},
273 {RSP_OK, 608, 608, -1, 609, -1},
274 {RSP_ZSAU, 609, 609, ZSAU_PROCEEDING, 610, 5, {ACT_CMD+AT_DIAL} },
275 {RSP_OK, 610, 610, -1, 650, 0, {ACT_DIALING} },
276
277 {RSP_ERROR, 601, 610, -1, 0, 0, {ACT_ABORTDIAL} },
278 {EV_TIMEOUT, 601, 610, -1, 0, 0, {ACT_ABORTDIAL} },
279
280 /* optional dialing responses */
281 {EV_BC_OPEN, 650, 650, -1, 651, -1},
282 {RSP_ZVLS, 609, 651, 17, -1, -1, {ACT_DEBUG} },
283 {RSP_ZCTP, 610, 651, -1, -1, -1, {ACT_DEBUG} },
284 {RSP_ZCPN, 610, 651, -1, -1, -1, {ACT_DEBUG} },
285 {RSP_ZSAU, 650, 651, ZSAU_CALL_DELIVERED, -1, -1, {ACT_DEBUG} },
286
287 /* connect */
288 {RSP_ZSAU, 650, 650, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT} },
289 {RSP_ZSAU, 651, 651, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT,
290 ACT_NOTIFY_BC_UP} },
291 {RSP_ZSAU, 750, 750, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT} },
292 {RSP_ZSAU, 751, 751, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT,
293 ACT_NOTIFY_BC_UP} },
294 {EV_BC_OPEN, 800, 800, -1, 800, -1, {ACT_NOTIFY_BC_UP} },
295
296 /* remote hangup */
297 {RSP_ZSAU, 650, 651, ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEREJECT} },
298 {RSP_ZSAU, 750, 751, ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEHUP} },
299 {RSP_ZSAU, 800, 800, ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEHUP} },
300
301 /* hangup */
302 {EV_HUP, -1, -1, -1, -1, -1, {ACT_HUP} },
303 {RSP_INIT, -1, -1, SEQ_HUP, 401, 5, {0}, "+VLS=0\r"},
304 {RSP_OK, 401, 401, -1, 402, 5},
305 {RSP_ZVLS, 402, 402, 0, 403, 5},
306 {RSP_ZSAU, 403, 403, ZSAU_DISCONNECT_REQ, -1, -1, {ACT_DEBUG} },
307 {RSP_ZSAU, 403, 403, ZSAU_NULL, 0, 0, {ACT_DISCONNECT} },
308 {RSP_NODEV, 401, 403, -1, 0, 0, {ACT_FAKEHUP} },
309 {RSP_ERROR, 401, 401, -1, 0, 0, {ACT_ABORTHUP} },
310 {EV_TIMEOUT, 401, 403, -1, 0, 0, {ACT_ABORTHUP} },
311
312 {EV_BC_CLOSED, 0, 0, -1, 0, -1, {ACT_NOTIFY_BC_DOWN} },
313
314 /* ring */
315 {RSP_ZBC, 700, 700, -1, -1, -1, {0} },
316 {RSP_ZHLC, 700, 700, -1, -1, -1, {0} },
317 {RSP_NMBR, 700, 700, -1, -1, -1, {0} },
318 {RSP_ZCPN, 700, 700, -1, -1, -1, {0} },
319 {RSP_ZCTP, 700, 700, -1, -1, -1, {0} },
320 {EV_TIMEOUT, 700, 700, -1, 720, 720, {ACT_ICALL} },
321 {EV_BC_CLOSED, 720, 720, -1, 0, -1, {ACT_NOTIFY_BC_DOWN} },
322
323 /*accept icall*/
324 {EV_ACCEPT, -1, -1, -1, -1, -1, {ACT_ACCEPT} },
325 {RSP_INIT, 720, 720, SEQ_ACCEPT, 721, 5, {ACT_CMD+AT_PROTO} },
326 {RSP_OK, 721, 721, -1, 722, 5, {ACT_CMD+AT_ISO} },
327 {RSP_OK, 722, 722, -1, 723, 5, {0}, "+VLS=17\r"},
328 {RSP_OK, 723, 723, -1, 724, 5, {0} },
329 {RSP_ZVLS, 724, 724, 17, 750, 50, {ACT_ACCEPTED} },
330 {RSP_ERROR, 721, 729, -1, 0, 0, {ACT_ABORTACCEPT} },
331 {EV_TIMEOUT, 721, 729, -1, 0, 0, {ACT_ABORTACCEPT} },
332 {RSP_ZSAU, 700, 729, ZSAU_NULL, 0, 0, {ACT_ABORTACCEPT} },
333 {RSP_ZSAU, 700, 729, ZSAU_ACTIVE, 0, 0, {ACT_ABORTACCEPT} },
334 {RSP_ZSAU, 700, 729, ZSAU_DISCONNECT_IND, 0, 0, {ACT_ABORTACCEPT} },
335
336 {EV_BC_OPEN, 750, 750, -1, 751, -1},
337 {EV_TIMEOUT, 750, 751, -1, 0, 0, {ACT_CONNTIMEOUT} },
338
339 /* B channel closed (general case) */
340 {EV_BC_CLOSED, -1, -1, -1, -1, -1, {ACT_NOTIFY_BC_DOWN} },
341
342 /* misc. */
343 {RSP_ZCON, -1, -1, -1, -1, -1, {ACT_DEBUG} },
344 {RSP_ZCAU, -1, -1, -1, -1, -1, {ACT_ZCAU} },
345 {RSP_NONE, -1, -1, -1, -1, -1, {ACT_DEBUG} },
346 {RSP_ANY, -1, -1, -1, -1, -1, {ACT_WARN} },
347 {RSP_LAST}
348 };
349
350
351 static const struct resp_type_t {
352 unsigned char *response;
353 int resp_code;
354 int type;
355 } resp_type[] =
356 {
357 {"OK", RSP_OK, RT_NOTHING},
358 {"ERROR", RSP_ERROR, RT_NOTHING},
359 {"ZSAU", RSP_ZSAU, RT_ZSAU},
360 {"ZCAU", RSP_ZCAU, RT_ZCAU},
361 {"RING", RSP_RING, RT_RING},
362 {"ZGCI", RSP_ZGCI, RT_NUMBER},
363 {"ZVLS", RSP_ZVLS, RT_NUMBER},
364 {"ZCTP", RSP_ZCTP, RT_NUMBER},
365 {"ZDLE", RSP_ZDLE, RT_NUMBER},
366 {"ZHLC", RSP_ZHLC, RT_STRING},
367 {"ZBC", RSP_ZBC, RT_STRING},
368 {"NMBR", RSP_NMBR, RT_STRING},
369 {"ZCPN", RSP_ZCPN, RT_STRING},
370 {"ZCON", RSP_ZCON, RT_STRING},
371 {NULL, 0, 0}
372 };
373
374 static const struct zsau_resp_t {
375 unsigned char *str;
376 int code;
377 } zsau_resp[] =
378 {
379 {"OUTGOING_CALL_PROCEEDING", ZSAU_OUTGOING_CALL_PROCEEDING},
380 {"CALL_DELIVERED", ZSAU_CALL_DELIVERED},
381 {"ACTIVE", ZSAU_ACTIVE},
382 {"DISCONNECT_IND", ZSAU_DISCONNECT_IND},
383 {"NULL", ZSAU_NULL},
384 {"DISCONNECT_REQ", ZSAU_DISCONNECT_REQ},
385 {NULL, ZSAU_UNKNOWN}
386 };
387
388 /* retrieve CID from parsed response
389 * returns 0 if no CID, -1 if invalid CID, or CID value 1..65535
390 */
391 static int cid_of_response(char *s)
392 {
393 unsigned long cid;
394 int rc;
395
396 if (s[-1] != ';')
397 return 0; /* no CID separator */
398 rc = strict_strtoul(s, 10, &cid);
399 if (rc)
400 return 0; /* CID not numeric */
401 if (cid < 1 || cid > 65535)
402 return -1; /* CID out of range */
403 return cid;
404 }
405
406 /**
407 * gigaset_handle_modem_response() - process received modem response
408 * @cs: device descriptor structure.
409 *
410 * Called by asyncdata/isocdata if a block of data received from the
411 * device must be processed as a modem command response. The data is
412 * already in the cs structure.
413 */
414 void gigaset_handle_modem_response(struct cardstate *cs)
415 {
416 unsigned char *argv[MAX_REC_PARAMS + 1];
417 int params;
418 int i, j;
419 const struct resp_type_t *rt;
420 const struct zsau_resp_t *zr;
421 int curarg;
422 unsigned long flags;
423 unsigned next, tail, head;
424 struct event_t *event;
425 int resp_code;
426 int param_type;
427 int abort;
428 size_t len;
429 int cid;
430 int rawstring;
431
432 len = cs->cbytes;
433 if (!len) {
434 /* ignore additional LFs/CRs (M10x config mode or cx100) */
435 gig_dbg(DEBUG_MCMD, "skipped EOL [%02X]", cs->respdata[len]);
436 return;
437 }
438 cs->respdata[len] = 0;
439 argv[0] = cs->respdata;
440 params = 1;
441 if (cs->at_state.getstring) {
442 /* getstring only allowed without cid at the moment */
443 cs->at_state.getstring = 0;
444 rawstring = 1;
445 cid = 0;
446 } else {
447 /* parse line */
448 for (i = 0; i < len; i++)
449 switch (cs->respdata[i]) {
450 case ';':
451 case ',':
452 case '=':
453 if (params > MAX_REC_PARAMS) {
454 dev_warn(cs->dev,
455 "too many parameters in response\n");
456 /* need last parameter (might be CID) */
457 params--;
458 }
459 argv[params++] = cs->respdata + i + 1;
460 }
461
462 rawstring = 0;
463 cid = params > 1 ? cid_of_response(argv[params-1]) : 0;
464 if (cid < 0) {
465 gigaset_add_event(cs, &cs->at_state, RSP_INVAL,
466 NULL, 0, NULL);
467 return;
468 }
469
470 for (j = 1; j < params; ++j)
471 argv[j][-1] = 0;
472
473 gig_dbg(DEBUG_EVENT, "CMD received: %s", argv[0]);
474 if (cid) {
475 --params;
476 gig_dbg(DEBUG_EVENT, "CID: %s", argv[params]);
477 }
478 gig_dbg(DEBUG_EVENT, "available params: %d", params - 1);
479 for (j = 1; j < params; j++)
480 gig_dbg(DEBUG_EVENT, "param %d: %s", j, argv[j]);
481 }
482
483 spin_lock_irqsave(&cs->ev_lock, flags);
484 head = cs->ev_head;
485 tail = cs->ev_tail;
486
487 abort = 1;
488 curarg = 0;
489 while (curarg < params) {
490 next = (tail + 1) % MAX_EVENTS;
491 if (unlikely(next == head)) {
492 dev_err(cs->dev, "event queue full\n");
493 break;
494 }
495
496 event = cs->events + tail;
497 event->at_state = NULL;
498 event->cid = cid;
499 event->ptr = NULL;
500 event->arg = NULL;
501 tail = next;
502
503 if (rawstring) {
504 resp_code = RSP_STRING;
505 param_type = RT_STRING;
506 } else {
507 for (rt = resp_type; rt->response; ++rt)
508 if (!strcmp(argv[curarg], rt->response))
509 break;
510
511 if (!rt->response) {
512 event->type = RSP_NONE;
513 gig_dbg(DEBUG_EVENT,
514 "unknown modem response: '%s'\n",
515 argv[curarg]);
516 break;
517 }
518
519 resp_code = rt->resp_code;
520 param_type = rt->type;
521 ++curarg;
522 }
523
524 event->type = resp_code;
525
526 switch (param_type) {
527 case RT_NOTHING:
528 break;
529 case RT_RING:
530 if (!cid) {
531 dev_err(cs->dev,
532 "received RING without CID!\n");
533 event->type = RSP_INVAL;
534 abort = 1;
535 } else {
536 event->cid = 0;
537 event->parameter = cid;
538 abort = 0;
539 }
540 break;
541 case RT_ZSAU:
542 if (curarg >= params) {
543 event->parameter = ZSAU_NONE;
544 break;
545 }
546 for (zr = zsau_resp; zr->str; ++zr)
547 if (!strcmp(argv[curarg], zr->str))
548 break;
549 event->parameter = zr->code;
550 if (!zr->str)
551 dev_warn(cs->dev,
552 "%s: unknown parameter %s after ZSAU\n",
553 __func__, argv[curarg]);
554 ++curarg;
555 break;
556 case RT_STRING:
557 if (curarg < params) {
558 event->ptr = kstrdup(argv[curarg], GFP_ATOMIC);
559 if (!event->ptr)
560 dev_err(cs->dev, "out of memory\n");
561 ++curarg;
562 }
563 gig_dbg(DEBUG_EVENT, "string==%s",
564 event->ptr ? (char *) event->ptr : "NULL");
565 break;
566 case RT_ZCAU:
567 event->parameter = -1;
568 if (curarg + 1 < params) {
569 unsigned long type, value;
570
571 i = strict_strtoul(argv[curarg++], 16, &type);
572 j = strict_strtoul(argv[curarg++], 16, &value);
573
574 if (i == 0 && type < 256 &&
575 j == 0 && value < 256)
576 event->parameter = (type << 8) | value;
577 } else
578 curarg = params - 1;
579 break;
580 case RT_NUMBER:
581 event->parameter = -1;
582 if (curarg < params) {
583 unsigned long res;
584 int rc;
585
586 rc = strict_strtoul(argv[curarg++], 10, &res);
587 if (rc == 0)
588 event->parameter = res;
589 }
590 gig_dbg(DEBUG_EVENT, "parameter==%d", event->parameter);
591 break;
592 }
593
594 if (resp_code == RSP_ZDLE)
595 cs->dle = event->parameter;
596
597 if (abort)
598 break;
599 }
600
601 cs->ev_tail = tail;
602 spin_unlock_irqrestore(&cs->ev_lock, flags);
603
604 if (curarg != params)
605 gig_dbg(DEBUG_EVENT,
606 "invalid number of processed parameters: %d/%d",
607 curarg, params);
608 }
609 EXPORT_SYMBOL_GPL(gigaset_handle_modem_response);
610
611 /* disconnect
612 * process closing of connection associated with given AT state structure
613 */
614 static void disconnect(struct at_state_t **at_state_p)
615 {
616 unsigned long flags;
617 struct bc_state *bcs = (*at_state_p)->bcs;
618 struct cardstate *cs = (*at_state_p)->cs;
619
620 spin_lock_irqsave(&cs->lock, flags);
621 ++(*at_state_p)->seq_index;
622
623 /* revert to selected idle mode */
624 if (!cs->cidmode) {
625 cs->at_state.pending_commands |= PC_UMMODE;
626 gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
627 cs->commands_pending = 1;
628 }
629 spin_unlock_irqrestore(&cs->lock, flags);
630
631 if (bcs) {
632 /* B channel assigned: invoke hardware specific handler */
633 cs->ops->close_bchannel(bcs);
634 /* notify LL */
635 if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
636 bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
637 gigaset_isdn_hupD(bcs);
638 }
639 } else {
640 /* no B channel assigned: just deallocate */
641 spin_lock_irqsave(&cs->lock, flags);
642 list_del(&(*at_state_p)->list);
643 kfree(*at_state_p);
644 *at_state_p = NULL;
645 spin_unlock_irqrestore(&cs->lock, flags);
646 }
647 }
648
649 /* get_free_channel
650 * get a free AT state structure: either one of those associated with the
651 * B channels of the Gigaset device, or if none of those is available,
652 * a newly allocated one with bcs=NULL
653 * The structure should be freed by calling disconnect() after use.
654 */
655 static inline struct at_state_t *get_free_channel(struct cardstate *cs,
656 int cid)
657 /* cids: >0: siemens-cid
658 0: without cid
659 -1: no cid assigned yet
660 */
661 {
662 unsigned long flags;
663 int i;
664 struct at_state_t *ret;
665
666 for (i = 0; i < cs->channels; ++i)
667 if (gigaset_get_channel(cs->bcs + i)) {
668 ret = &cs->bcs[i].at_state;
669 ret->cid = cid;
670 return ret;
671 }
672
673 spin_lock_irqsave(&cs->lock, flags);
674 ret = kmalloc(sizeof(struct at_state_t), GFP_ATOMIC);
675 if (ret) {
676 gigaset_at_init(ret, NULL, cs, cid);
677 list_add(&ret->list, &cs->temp_at_states);
678 }
679 spin_unlock_irqrestore(&cs->lock, flags);
680 return ret;
681 }
682
683 static void init_failed(struct cardstate *cs, int mode)
684 {
685 int i;
686 struct at_state_t *at_state;
687
688 cs->at_state.pending_commands &= ~PC_INIT;
689 cs->mode = mode;
690 cs->mstate = MS_UNINITIALIZED;
691 gigaset_free_channels(cs);
692 for (i = 0; i < cs->channels; ++i) {
693 at_state = &cs->bcs[i].at_state;
694 if (at_state->pending_commands & PC_CID) {
695 at_state->pending_commands &= ~PC_CID;
696 at_state->pending_commands |= PC_NOCID;
697 cs->commands_pending = 1;
698 }
699 }
700 }
701
702 static void schedule_init(struct cardstate *cs, int state)
703 {
704 if (cs->at_state.pending_commands & PC_INIT) {
705 gig_dbg(DEBUG_EVENT, "not scheduling PC_INIT again");
706 return;
707 }
708 cs->mstate = state;
709 cs->mode = M_UNKNOWN;
710 gigaset_block_channels(cs);
711 cs->at_state.pending_commands |= PC_INIT;
712 gig_dbg(DEBUG_EVENT, "Scheduling PC_INIT");
713 cs->commands_pending = 1;
714 }
715
716 /* Add "AT" to a command, add the cid, dle encode it, send the result to the
717 hardware. */
718 static void send_command(struct cardstate *cs, const char *cmd, int cid,
719 int dle, gfp_t kmallocflags)
720 {
721 struct cmdbuf_t *cb;
722 size_t buflen;
723
724 buflen = strlen(cmd) + 12; /* DLE ( A T 1 2 3 4 5 <cmd> DLE ) \0 */
725 cb = kmalloc(sizeof(struct cmdbuf_t) + buflen, kmallocflags);
726 if (!cb) {
727 dev_err(cs->dev, "%s: out of memory\n", __func__);
728 return;
729 }
730 if (cid > 0 && cid <= 65535)
731 cb->len = snprintf(cb->buf, buflen,
732 dle ? "\020(AT%d%s\020)" : "AT%d%s",
733 cid, cmd);
734 else
735 cb->len = snprintf(cb->buf, buflen,
736 dle ? "\020(AT%s\020)" : "AT%s",
737 cmd);
738 cb->offset = 0;
739 cb->next = NULL;
740 cb->wake_tasklet = NULL;
741 cs->ops->write_cmd(cs, cb);
742 }
743
744 static struct at_state_t *at_state_from_cid(struct cardstate *cs, int cid)
745 {
746 struct at_state_t *at_state;
747 int i;
748 unsigned long flags;
749
750 if (cid == 0)
751 return &cs->at_state;
752
753 for (i = 0; i < cs->channels; ++i)
754 if (cid == cs->bcs[i].at_state.cid)
755 return &cs->bcs[i].at_state;
756
757 spin_lock_irqsave(&cs->lock, flags);
758
759 list_for_each_entry(at_state, &cs->temp_at_states, list)
760 if (cid == at_state->cid) {
761 spin_unlock_irqrestore(&cs->lock, flags);
762 return at_state;
763 }
764
765 spin_unlock_irqrestore(&cs->lock, flags);
766
767 return NULL;
768 }
769
770 static void bchannel_down(struct bc_state *bcs)
771 {
772 if (bcs->chstate & CHS_B_UP) {
773 bcs->chstate &= ~CHS_B_UP;
774 gigaset_isdn_hupB(bcs);
775 }
776
777 if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
778 bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
779 gigaset_isdn_hupD(bcs);
780 }
781
782 gigaset_free_channel(bcs);
783
784 gigaset_bcs_reinit(bcs);
785 }
786
787 static void bchannel_up(struct bc_state *bcs)
788 {
789 if (bcs->chstate & CHS_B_UP) {
790 dev_notice(bcs->cs->dev, "%s: B channel already up\n",
791 __func__);
792 return;
793 }
794
795 bcs->chstate |= CHS_B_UP;
796 gigaset_isdn_connB(bcs);
797 }
798
799 static void start_dial(struct at_state_t *at_state, void *data,
800 unsigned seq_index)
801 {
802 struct bc_state *bcs = at_state->bcs;
803 struct cardstate *cs = at_state->cs;
804 char **commands = data;
805 unsigned long flags;
806 int i;
807
808 bcs->chstate |= CHS_NOTIFY_LL;
809
810 spin_lock_irqsave(&cs->lock, flags);
811 if (at_state->seq_index != seq_index) {
812 spin_unlock_irqrestore(&cs->lock, flags);
813 goto error;
814 }
815 spin_unlock_irqrestore(&cs->lock, flags);
816
817 for (i = 0; i < AT_NUM; ++i) {
818 kfree(bcs->commands[i]);
819 bcs->commands[i] = commands[i];
820 }
821
822 at_state->pending_commands |= PC_CID;
823 gig_dbg(DEBUG_EVENT, "Scheduling PC_CID");
824 cs->commands_pending = 1;
825 return;
826
827 error:
828 for (i = 0; i < AT_NUM; ++i) {
829 kfree(commands[i]);
830 commands[i] = NULL;
831 }
832 at_state->pending_commands |= PC_NOCID;
833 gig_dbg(DEBUG_EVENT, "Scheduling PC_NOCID");
834 cs->commands_pending = 1;
835 return;
836 }
837
838 static void start_accept(struct at_state_t *at_state)
839 {
840 struct cardstate *cs = at_state->cs;
841 struct bc_state *bcs = at_state->bcs;
842 int i;
843
844 for (i = 0; i < AT_NUM; ++i) {
845 kfree(bcs->commands[i]);
846 bcs->commands[i] = NULL;
847 }
848
849 bcs->commands[AT_PROTO] = kmalloc(9, GFP_ATOMIC);
850 bcs->commands[AT_ISO] = kmalloc(9, GFP_ATOMIC);
851 if (!bcs->commands[AT_PROTO] || !bcs->commands[AT_ISO]) {
852 dev_err(at_state->cs->dev, "out of memory\n");
853 /* error reset */
854 at_state->pending_commands |= PC_HUP;
855 gig_dbg(DEBUG_EVENT, "Scheduling PC_HUP");
856 cs->commands_pending = 1;
857 return;
858 }
859
860 snprintf(bcs->commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
861 snprintf(bcs->commands[AT_ISO], 9, "^SISO=%u\r", bcs->channel + 1);
862
863 at_state->pending_commands |= PC_ACCEPT;
864 gig_dbg(DEBUG_EVENT, "Scheduling PC_ACCEPT");
865 cs->commands_pending = 1;
866 }
867
868 static void do_start(struct cardstate *cs)
869 {
870 gigaset_free_channels(cs);
871
872 if (cs->mstate != MS_LOCKED)
873 schedule_init(cs, MS_INIT);
874
875 cs->isdn_up = 1;
876 gigaset_isdn_start(cs);
877
878 cs->waiting = 0;
879 wake_up(&cs->waitqueue);
880 }
881
882 static void finish_shutdown(struct cardstate *cs)
883 {
884 if (cs->mstate != MS_LOCKED) {
885 cs->mstate = MS_UNINITIALIZED;
886 cs->mode = M_UNKNOWN;
887 }
888
889 /* Tell the LL that the device is not available .. */
890 if (cs->isdn_up) {
891 cs->isdn_up = 0;
892 gigaset_isdn_stop(cs);
893 }
894
895 /* The rest is done by cleanup_cs () in user mode. */
896
897 cs->cmd_result = -ENODEV;
898 cs->waiting = 0;
899 wake_up(&cs->waitqueue);
900 }
901
902 static void do_shutdown(struct cardstate *cs)
903 {
904 gigaset_block_channels(cs);
905
906 if (cs->mstate == MS_READY) {
907 cs->mstate = MS_SHUTDOWN;
908 cs->at_state.pending_commands |= PC_SHUTDOWN;
909 gig_dbg(DEBUG_EVENT, "Scheduling PC_SHUTDOWN");
910 cs->commands_pending = 1;
911 } else
912 finish_shutdown(cs);
913 }
914
915 static void do_stop(struct cardstate *cs)
916 {
917 unsigned long flags;
918
919 spin_lock_irqsave(&cs->lock, flags);
920 cs->connected = 0;
921 spin_unlock_irqrestore(&cs->lock, flags);
922
923 do_shutdown(cs);
924 }
925
926 /* Entering cid mode or getting a cid failed:
927 * try to initialize the device and try again.
928 *
929 * channel >= 0: getting cid for the channel failed
930 * channel < 0: entering cid mode failed
931 *
932 * returns 0 on failure
933 */
934 static int reinit_and_retry(struct cardstate *cs, int channel)
935 {
936 int i;
937
938 if (--cs->retry_count <= 0)
939 return 0;
940
941 for (i = 0; i < cs->channels; ++i)
942 if (cs->bcs[i].at_state.cid > 0)
943 return 0;
944
945 if (channel < 0)
946 dev_warn(cs->dev,
947 "Could not enter cid mode. Reinit device and try again.\n");
948 else {
949 dev_warn(cs->dev,
950 "Could not get a call id. Reinit device and try again.\n");
951 cs->bcs[channel].at_state.pending_commands |= PC_CID;
952 }
953 schedule_init(cs, MS_INIT);
954 return 1;
955 }
956
957 static int at_state_invalid(struct cardstate *cs,
958 struct at_state_t *test_ptr)
959 {
960 unsigned long flags;
961 unsigned channel;
962 struct at_state_t *at_state;
963 int retval = 0;
964
965 spin_lock_irqsave(&cs->lock, flags);
966
967 if (test_ptr == &cs->at_state)
968 goto exit;
969
970 list_for_each_entry(at_state, &cs->temp_at_states, list)
971 if (at_state == test_ptr)
972 goto exit;
973
974 for (channel = 0; channel < cs->channels; ++channel)
975 if (&cs->bcs[channel].at_state == test_ptr)
976 goto exit;
977
978 retval = 1;
979 exit:
980 spin_unlock_irqrestore(&cs->lock, flags);
981 return retval;
982 }
983
984 static void handle_icall(struct cardstate *cs, struct bc_state *bcs,
985 struct at_state_t **p_at_state)
986 {
987 int retval;
988 struct at_state_t *at_state = *p_at_state;
989
990 retval = gigaset_isdn_icall(at_state);
991 switch (retval) {
992 case ICALL_ACCEPT:
993 break;
994 default:
995 dev_err(cs->dev, "internal error: disposition=%d\n", retval);
996 /* --v-- fall through --v-- */
997 case ICALL_IGNORE:
998 case ICALL_REJECT:
999 /* hang up actively
1000 * Device doc says that would reject the call.
1001 * In fact it doesn't.
1002 */
1003 at_state->pending_commands |= PC_HUP;
1004 cs->commands_pending = 1;
1005 break;
1006 }
1007 }
1008
1009 static int do_lock(struct cardstate *cs)
1010 {
1011 int mode;
1012 int i;
1013
1014 switch (cs->mstate) {
1015 case MS_UNINITIALIZED:
1016 case MS_READY:
1017 if (cs->cur_at_seq || !list_empty(&cs->temp_at_states) ||
1018 cs->at_state.pending_commands)
1019 return -EBUSY;
1020
1021 for (i = 0; i < cs->channels; ++i)
1022 if (cs->bcs[i].at_state.pending_commands)
1023 return -EBUSY;
1024
1025 if (!gigaset_get_channels(cs))
1026 return -EBUSY;
1027
1028 break;
1029 case MS_LOCKED:
1030 break;
1031 default:
1032 return -EBUSY;
1033 }
1034
1035 mode = cs->mode;
1036 cs->mstate = MS_LOCKED;
1037 cs->mode = M_UNKNOWN;
1038
1039 return mode;
1040 }
1041
1042 static int do_unlock(struct cardstate *cs)
1043 {
1044 if (cs->mstate != MS_LOCKED)
1045 return -EINVAL;
1046
1047 cs->mstate = MS_UNINITIALIZED;
1048 cs->mode = M_UNKNOWN;
1049 gigaset_free_channels(cs);
1050 if (cs->connected)
1051 schedule_init(cs, MS_INIT);
1052
1053 return 0;
1054 }
1055
1056 static void do_action(int action, struct cardstate *cs,
1057 struct bc_state *bcs,
1058 struct at_state_t **p_at_state, char **pp_command,
1059 int *p_genresp, int *p_resp_code,
1060 struct event_t *ev)
1061 {
1062 struct at_state_t *at_state = *p_at_state;
1063 struct at_state_t *at_state2;
1064 unsigned long flags;
1065
1066 int channel;
1067
1068 unsigned char *s, *e;
1069 int i;
1070 unsigned long val;
1071
1072 switch (action) {
1073 case ACT_NOTHING:
1074 break;
1075 case ACT_TIMEOUT:
1076 at_state->waiting = 1;
1077 break;
1078 case ACT_INIT:
1079 cs->at_state.pending_commands &= ~PC_INIT;
1080 cs->cur_at_seq = SEQ_NONE;
1081 cs->mode = M_UNIMODEM;
1082 spin_lock_irqsave(&cs->lock, flags);
1083 if (!cs->cidmode) {
1084 spin_unlock_irqrestore(&cs->lock, flags);
1085 gigaset_free_channels(cs);
1086 cs->mstate = MS_READY;
1087 break;
1088 }
1089 spin_unlock_irqrestore(&cs->lock, flags);
1090 cs->at_state.pending_commands |= PC_CIDMODE;
1091 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1092 cs->commands_pending = 1;
1093 break;
1094 case ACT_FAILINIT:
1095 dev_warn(cs->dev, "Could not initialize the device.\n");
1096 cs->dle = 0;
1097 init_failed(cs, M_UNKNOWN);
1098 cs->cur_at_seq = SEQ_NONE;
1099 break;
1100 case ACT_CONFIGMODE:
1101 init_failed(cs, M_CONFIG);
1102 cs->cur_at_seq = SEQ_NONE;
1103 break;
1104 case ACT_SETDLE1:
1105 cs->dle = 1;
1106 /* cs->inbuf[0].inputstate |= INS_command | INS_DLE_command; */
1107 cs->inbuf[0].inputstate &=
1108 ~(INS_command | INS_DLE_command);
1109 break;
1110 case ACT_SETDLE0:
1111 cs->dle = 0;
1112 cs->inbuf[0].inputstate =
1113 (cs->inbuf[0].inputstate & ~INS_DLE_command)
1114 | INS_command;
1115 break;
1116 case ACT_CMODESET:
1117 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1118 gigaset_free_channels(cs);
1119 cs->mstate = MS_READY;
1120 }
1121 cs->mode = M_CID;
1122 cs->cur_at_seq = SEQ_NONE;
1123 break;
1124 case ACT_UMODESET:
1125 cs->mode = M_UNIMODEM;
1126 cs->cur_at_seq = SEQ_NONE;
1127 break;
1128 case ACT_FAILCMODE:
1129 cs->cur_at_seq = SEQ_NONE;
1130 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1131 init_failed(cs, M_UNKNOWN);
1132 break;
1133 }
1134 if (!reinit_and_retry(cs, -1))
1135 schedule_init(cs, MS_RECOVER);
1136 break;
1137 case ACT_FAILUMODE:
1138 cs->cur_at_seq = SEQ_NONE;
1139 schedule_init(cs, MS_RECOVER);
1140 break;
1141 case ACT_HUPMODEM:
1142 /* send "+++" (hangup in unimodem mode) */
1143 if (cs->connected) {
1144 struct cmdbuf_t *cb;
1145
1146 cb = kmalloc(sizeof(struct cmdbuf_t) + 3, GFP_ATOMIC);
1147 if (!cb) {
1148 dev_err(cs->dev, "%s: out of memory\n",
1149 __func__);
1150 return;
1151 }
1152 memcpy(cb->buf, "+++", 3);
1153 cb->len = 3;
1154 cb->offset = 0;
1155 cb->next = NULL;
1156 cb->wake_tasklet = NULL;
1157 cs->ops->write_cmd(cs, cb);
1158 }
1159 break;
1160 case ACT_RING:
1161 /* get fresh AT state structure for new CID */
1162 at_state2 = get_free_channel(cs, ev->parameter);
1163 if (!at_state2) {
1164 dev_warn(cs->dev,
1165 "RING ignored: could not allocate channel structure\n");
1166 break;
1167 }
1168
1169 /* initialize AT state structure
1170 * note that bcs may be NULL if no B channel is free
1171 */
1172 at_state2->ConState = 700;
1173 for (i = 0; i < STR_NUM; ++i) {
1174 kfree(at_state2->str_var[i]);
1175 at_state2->str_var[i] = NULL;
1176 }
1177 at_state2->int_var[VAR_ZCTP] = -1;
1178
1179 spin_lock_irqsave(&cs->lock, flags);
1180 at_state2->timer_expires = RING_TIMEOUT;
1181 at_state2->timer_active = 1;
1182 spin_unlock_irqrestore(&cs->lock, flags);
1183 break;
1184 case ACT_ICALL:
1185 handle_icall(cs, bcs, p_at_state);
1186 break;
1187 case ACT_FAILSDOWN:
1188 dev_warn(cs->dev, "Could not shut down the device.\n");
1189 /* fall through */
1190 case ACT_FAKESDOWN:
1191 case ACT_SDOWN:
1192 cs->cur_at_seq = SEQ_NONE;
1193 finish_shutdown(cs);
1194 break;
1195 case ACT_CONNECT:
1196 if (cs->onechannel) {
1197 at_state->pending_commands |= PC_DLE1;
1198 cs->commands_pending = 1;
1199 break;
1200 }
1201 bcs->chstate |= CHS_D_UP;
1202 gigaset_isdn_connD(bcs);
1203 cs->ops->init_bchannel(bcs);
1204 break;
1205 case ACT_DLE1:
1206 cs->cur_at_seq = SEQ_NONE;
1207 bcs = cs->bcs + cs->curchannel;
1208
1209 bcs->chstate |= CHS_D_UP;
1210 gigaset_isdn_connD(bcs);
1211 cs->ops->init_bchannel(bcs);
1212 break;
1213 case ACT_FAKEHUP:
1214 at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
1215 /* fall through */
1216 case ACT_DISCONNECT:
1217 cs->cur_at_seq = SEQ_NONE;
1218 at_state->cid = -1;
1219 if (bcs && cs->onechannel && cs->dle) {
1220 /* Check for other open channels not needed:
1221 * DLE only used for M10x with one B channel.
1222 */
1223 at_state->pending_commands |= PC_DLE0;
1224 cs->commands_pending = 1;
1225 } else
1226 disconnect(p_at_state);
1227 break;
1228 case ACT_FAKEDLE0:
1229 at_state->int_var[VAR_ZDLE] = 0;
1230 cs->dle = 0;
1231 /* fall through */
1232 case ACT_DLE0:
1233 cs->cur_at_seq = SEQ_NONE;
1234 at_state2 = &cs->bcs[cs->curchannel].at_state;
1235 disconnect(&at_state2);
1236 break;
1237 case ACT_ABORTHUP:
1238 cs->cur_at_seq = SEQ_NONE;
1239 dev_warn(cs->dev, "Could not hang up.\n");
1240 at_state->cid = -1;
1241 if (bcs && cs->onechannel)
1242 at_state->pending_commands |= PC_DLE0;
1243 else
1244 disconnect(p_at_state);
1245 schedule_init(cs, MS_RECOVER);
1246 break;
1247 case ACT_FAILDLE0:
1248 cs->cur_at_seq = SEQ_NONE;
1249 dev_warn(cs->dev, "Could not leave DLE mode.\n");
1250 at_state2 = &cs->bcs[cs->curchannel].at_state;
1251 disconnect(&at_state2);
1252 schedule_init(cs, MS_RECOVER);
1253 break;
1254 case ACT_FAILDLE1:
1255 cs->cur_at_seq = SEQ_NONE;
1256 dev_warn(cs->dev,
1257 "Could not enter DLE mode. Trying to hang up.\n");
1258 channel = cs->curchannel;
1259 cs->bcs[channel].at_state.pending_commands |= PC_HUP;
1260 cs->commands_pending = 1;
1261 break;
1262
1263 case ACT_CID: /* got cid; start dialing */
1264 cs->cur_at_seq = SEQ_NONE;
1265 channel = cs->curchannel;
1266 if (ev->parameter > 0 && ev->parameter <= 65535) {
1267 cs->bcs[channel].at_state.cid = ev->parameter;
1268 cs->bcs[channel].at_state.pending_commands |=
1269 PC_DIAL;
1270 cs->commands_pending = 1;
1271 break;
1272 }
1273 /* fall through */
1274 case ACT_FAILCID:
1275 cs->cur_at_seq = SEQ_NONE;
1276 channel = cs->curchannel;
1277 if (!reinit_and_retry(cs, channel)) {
1278 dev_warn(cs->dev,
1279 "Could not get a call ID. Cannot dial.\n");
1280 at_state2 = &cs->bcs[channel].at_state;
1281 disconnect(&at_state2);
1282 }
1283 break;
1284 case ACT_ABORTCID:
1285 cs->cur_at_seq = SEQ_NONE;
1286 at_state2 = &cs->bcs[cs->curchannel].at_state;
1287 disconnect(&at_state2);
1288 break;
1289
1290 case ACT_DIALING:
1291 case ACT_ACCEPTED:
1292 cs->cur_at_seq = SEQ_NONE;
1293 break;
1294
1295 case ACT_ABORTACCEPT: /* hangup/error/timeout during ICALL procssng */
1296 disconnect(p_at_state);
1297 break;
1298
1299 case ACT_ABORTDIAL: /* error/timeout during dial preparation */
1300 cs->cur_at_seq = SEQ_NONE;
1301 at_state->pending_commands |= PC_HUP;
1302 cs->commands_pending = 1;
1303 break;
1304
1305 case ACT_REMOTEREJECT: /* DISCONNECT_IND after dialling */
1306 case ACT_CONNTIMEOUT: /* timeout waiting for ZSAU=ACTIVE */
1307 case ACT_REMOTEHUP: /* DISCONNECT_IND with established connection */
1308 at_state->pending_commands |= PC_HUP;
1309 cs->commands_pending = 1;
1310 break;
1311 case ACT_GETSTRING: /* warning: RING, ZDLE, ...
1312 are not handled properly anymore */
1313 at_state->getstring = 1;
1314 break;
1315 case ACT_SETVER:
1316 if (!ev->ptr) {
1317 *p_genresp = 1;
1318 *p_resp_code = RSP_ERROR;
1319 break;
1320 }
1321 s = ev->ptr;
1322
1323 if (!strcmp(s, "OK")) {
1324 *p_genresp = 1;
1325 *p_resp_code = RSP_ERROR;
1326 break;
1327 }
1328
1329 for (i = 0; i < 4; ++i) {
1330 val = simple_strtoul(s, (char **) &e, 10);
1331 if (val > INT_MAX || e == s)
1332 break;
1333 if (i == 3) {
1334 if (*e)
1335 break;
1336 } else if (*e != '.')
1337 break;
1338 else
1339 s = e + 1;
1340 cs->fwver[i] = val;
1341 }
1342 if (i != 4) {
1343 *p_genresp = 1;
1344 *p_resp_code = RSP_ERROR;
1345 break;
1346 }
1347 /*at_state->getstring = 1;*/
1348 cs->gotfwver = 0;
1349 break;
1350 case ACT_GOTVER:
1351 if (cs->gotfwver == 0) {
1352 cs->gotfwver = 1;
1353 gig_dbg(DEBUG_EVENT,
1354 "firmware version %02d.%03d.%02d.%02d",
1355 cs->fwver[0], cs->fwver[1],
1356 cs->fwver[2], cs->fwver[3]);
1357 break;
1358 }
1359 /* fall through */
1360 case ACT_FAILVER:
1361 cs->gotfwver = -1;
1362 dev_err(cs->dev, "could not read firmware version.\n");
1363 break;
1364 case ACT_ERROR:
1365 gig_dbg(DEBUG_ANY, "%s: ERROR response in ConState %d",
1366 __func__, at_state->ConState);
1367 cs->cur_at_seq = SEQ_NONE;
1368 break;
1369 case ACT_DEBUG:
1370 gig_dbg(DEBUG_ANY, "%s: resp_code %d in ConState %d",
1371 __func__, ev->type, at_state->ConState);
1372 break;
1373 case ACT_WARN:
1374 dev_warn(cs->dev, "%s: resp_code %d in ConState %d!\n",
1375 __func__, ev->type, at_state->ConState);
1376 break;
1377 case ACT_ZCAU:
1378 dev_warn(cs->dev, "cause code %04x in connection state %d.\n",
1379 ev->parameter, at_state->ConState);
1380 break;
1381
1382 /* events from the LL */
1383 case ACT_DIAL:
1384 start_dial(at_state, ev->ptr, ev->parameter);
1385 break;
1386 case ACT_ACCEPT:
1387 start_accept(at_state);
1388 break;
1389 case ACT_HUP:
1390 at_state->pending_commands |= PC_HUP;
1391 gig_dbg(DEBUG_EVENT, "Scheduling PC_HUP");
1392 cs->commands_pending = 1;
1393 break;
1394
1395 /* hotplug events */
1396 case ACT_STOP:
1397 do_stop(cs);
1398 break;
1399 case ACT_START:
1400 do_start(cs);
1401 break;
1402
1403 /* events from the interface */
1404 case ACT_IF_LOCK:
1405 cs->cmd_result = ev->parameter ? do_lock(cs) : do_unlock(cs);
1406 cs->waiting = 0;
1407 wake_up(&cs->waitqueue);
1408 break;
1409 case ACT_IF_VER:
1410 if (ev->parameter != 0)
1411 cs->cmd_result = -EINVAL;
1412 else if (cs->gotfwver != 1) {
1413 cs->cmd_result = -ENOENT;
1414 } else {
1415 memcpy(ev->arg, cs->fwver, sizeof cs->fwver);
1416 cs->cmd_result = 0;
1417 }
1418 cs->waiting = 0;
1419 wake_up(&cs->waitqueue);
1420 break;
1421
1422 /* events from the proc file system */
1423 case ACT_PROC_CIDMODE:
1424 spin_lock_irqsave(&cs->lock, flags);
1425 if (ev->parameter != cs->cidmode) {
1426 cs->cidmode = ev->parameter;
1427 if (ev->parameter) {
1428 cs->at_state.pending_commands |= PC_CIDMODE;
1429 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1430 } else {
1431 cs->at_state.pending_commands |= PC_UMMODE;
1432 gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
1433 }
1434 cs->commands_pending = 1;
1435 }
1436 spin_unlock_irqrestore(&cs->lock, flags);
1437 cs->waiting = 0;
1438 wake_up(&cs->waitqueue);
1439 break;
1440
1441 /* events from the hardware drivers */
1442 case ACT_NOTIFY_BC_DOWN:
1443 bchannel_down(bcs);
1444 break;
1445 case ACT_NOTIFY_BC_UP:
1446 bchannel_up(bcs);
1447 break;
1448 case ACT_SHUTDOWN:
1449 do_shutdown(cs);
1450 break;
1451
1452
1453 default:
1454 if (action >= ACT_CMD && action < ACT_CMD + AT_NUM) {
1455 *pp_command = at_state->bcs->commands[action - ACT_CMD];
1456 if (!*pp_command) {
1457 *p_genresp = 1;
1458 *p_resp_code = RSP_NULL;
1459 }
1460 } else
1461 dev_err(cs->dev, "%s: action==%d!\n", __func__, action);
1462 }
1463 }
1464
1465 /* State machine to do the calling and hangup procedure */
1466 static void process_event(struct cardstate *cs, struct event_t *ev)
1467 {
1468 struct bc_state *bcs;
1469 char *p_command = NULL;
1470 struct reply_t *rep;
1471 int rcode;
1472 int genresp = 0;
1473 int resp_code = RSP_ERROR;
1474 int sendcid;
1475 struct at_state_t *at_state;
1476 int index;
1477 int curact;
1478 unsigned long flags;
1479
1480 if (ev->cid >= 0) {
1481 at_state = at_state_from_cid(cs, ev->cid);
1482 if (!at_state) {
1483 gig_dbg(DEBUG_EVENT, "event %d for invalid cid %d",
1484 ev->type, ev->cid);
1485 gigaset_add_event(cs, &cs->at_state, RSP_WRONG_CID,
1486 NULL, 0, NULL);
1487 return;
1488 }
1489 } else {
1490 at_state = ev->at_state;
1491 if (at_state_invalid(cs, at_state)) {
1492 gig_dbg(DEBUG_EVENT, "event for invalid at_state %p",
1493 at_state);
1494 return;
1495 }
1496 }
1497
1498 gig_dbg(DEBUG_EVENT, "connection state %d, event %d",
1499 at_state->ConState, ev->type);
1500
1501 bcs = at_state->bcs;
1502 sendcid = at_state->cid;
1503
1504 /* Setting the pointer to the dial array */
1505 rep = at_state->replystruct;
1506
1507 spin_lock_irqsave(&cs->lock, flags);
1508 if (ev->type == EV_TIMEOUT) {
1509 if (ev->parameter != at_state->timer_index
1510 || !at_state->timer_active) {
1511 ev->type = RSP_NONE; /* old timeout */
1512 gig_dbg(DEBUG_EVENT, "old timeout");
1513 } else if (!at_state->waiting)
1514 gig_dbg(DEBUG_EVENT, "timeout occurred");
1515 else
1516 gig_dbg(DEBUG_EVENT, "stopped waiting");
1517 }
1518 spin_unlock_irqrestore(&cs->lock, flags);
1519
1520 /* if the response belongs to a variable in at_state->int_var[VAR_XXXX]
1521 or at_state->str_var[STR_XXXX], set it */
1522 if (ev->type >= RSP_VAR && ev->type < RSP_VAR + VAR_NUM) {
1523 index = ev->type - RSP_VAR;
1524 at_state->int_var[index] = ev->parameter;
1525 } else if (ev->type >= RSP_STR && ev->type < RSP_STR + STR_NUM) {
1526 index = ev->type - RSP_STR;
1527 kfree(at_state->str_var[index]);
1528 at_state->str_var[index] = ev->ptr;
1529 ev->ptr = NULL; /* prevent process_events() from
1530 deallocating ptr */
1531 }
1532
1533 if (ev->type == EV_TIMEOUT || ev->type == RSP_STRING)
1534 at_state->getstring = 0;
1535
1536 /* Search row in dial array which matches modem response and current
1537 constate */
1538 for (;; rep++) {
1539 rcode = rep->resp_code;
1540 if (rcode == RSP_LAST) {
1541 /* found nothing...*/
1542 dev_warn(cs->dev, "%s: rcode=RSP_LAST: "
1543 "resp_code %d in ConState %d!\n",
1544 __func__, ev->type, at_state->ConState);
1545 return;
1546 }
1547 if ((rcode == RSP_ANY || rcode == ev->type)
1548 && ((int) at_state->ConState >= rep->min_ConState)
1549 && (rep->max_ConState < 0
1550 || (int) at_state->ConState <= rep->max_ConState)
1551 && (rep->parameter < 0 || rep->parameter == ev->parameter))
1552 break;
1553 }
1554
1555 p_command = rep->command;
1556
1557 at_state->waiting = 0;
1558 for (curact = 0; curact < MAXACT; ++curact) {
1559 /* The row tells us what we should do ..
1560 */
1561 do_action(rep->action[curact], cs, bcs, &at_state, &p_command,
1562 &genresp, &resp_code, ev);
1563 if (!at_state)
1564 break; /* may be freed after disconnect */
1565 }
1566
1567 if (at_state) {
1568 /* Jump to the next con-state regarding the array */
1569 if (rep->new_ConState >= 0)
1570 at_state->ConState = rep->new_ConState;
1571
1572 if (genresp) {
1573 spin_lock_irqsave(&cs->lock, flags);
1574 at_state->timer_expires = 0;
1575 at_state->timer_active = 0;
1576 spin_unlock_irqrestore(&cs->lock, flags);
1577 gigaset_add_event(cs, at_state, resp_code,
1578 NULL, 0, NULL);
1579 } else {
1580 /* Send command to modem if not NULL... */
1581 if (p_command) {
1582 if (cs->connected)
1583 send_command(cs, p_command,
1584 sendcid, cs->dle,
1585 GFP_ATOMIC);
1586 else
1587 gigaset_add_event(cs, at_state,
1588 RSP_NODEV,
1589 NULL, 0, NULL);
1590 }
1591
1592 spin_lock_irqsave(&cs->lock, flags);
1593 if (!rep->timeout) {
1594 at_state->timer_expires = 0;
1595 at_state->timer_active = 0;
1596 } else if (rep->timeout > 0) { /* new timeout */
1597 at_state->timer_expires = rep->timeout * 10;
1598 at_state->timer_active = 1;
1599 ++at_state->timer_index;
1600 }
1601 spin_unlock_irqrestore(&cs->lock, flags);
1602 }
1603 }
1604 }
1605
1606 static void schedule_sequence(struct cardstate *cs,
1607 struct at_state_t *at_state, int sequence)
1608 {
1609 cs->cur_at_seq = sequence;
1610 gigaset_add_event(cs, at_state, RSP_INIT, NULL, sequence, NULL);
1611 }
1612
1613 static void process_command_flags(struct cardstate *cs)
1614 {
1615 struct at_state_t *at_state = NULL;
1616 struct bc_state *bcs;
1617 int i;
1618 int sequence;
1619 unsigned long flags;
1620
1621 cs->commands_pending = 0;
1622
1623 if (cs->cur_at_seq) {
1624 gig_dbg(DEBUG_EVENT, "not searching scheduled commands: busy");
1625 return;
1626 }
1627
1628 gig_dbg(DEBUG_EVENT, "searching scheduled commands");
1629
1630 sequence = SEQ_NONE;
1631
1632 /* clear pending_commands and hangup channels on shutdown */
1633 if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1634 cs->at_state.pending_commands &= ~PC_CIDMODE;
1635 for (i = 0; i < cs->channels; ++i) {
1636 bcs = cs->bcs + i;
1637 at_state = &bcs->at_state;
1638 at_state->pending_commands &=
1639 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1640 if (at_state->cid > 0)
1641 at_state->pending_commands |= PC_HUP;
1642 if (at_state->pending_commands & PC_CID) {
1643 at_state->pending_commands |= PC_NOCID;
1644 at_state->pending_commands &= ~PC_CID;
1645 }
1646 }
1647 }
1648
1649 /* clear pending_commands and hangup channels on reset */
1650 if (cs->at_state.pending_commands & PC_INIT) {
1651 cs->at_state.pending_commands &= ~PC_CIDMODE;
1652 for (i = 0; i < cs->channels; ++i) {
1653 bcs = cs->bcs + i;
1654 at_state = &bcs->at_state;
1655 at_state->pending_commands &=
1656 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1657 if (at_state->cid > 0)
1658 at_state->pending_commands |= PC_HUP;
1659 if (cs->mstate == MS_RECOVER) {
1660 if (at_state->pending_commands & PC_CID) {
1661 at_state->pending_commands |= PC_NOCID;
1662 at_state->pending_commands &= ~PC_CID;
1663 }
1664 }
1665 }
1666 }
1667
1668 /* only switch back to unimodem mode if no commands are pending and
1669 * no channels are up */
1670 spin_lock_irqsave(&cs->lock, flags);
1671 if (cs->at_state.pending_commands == PC_UMMODE
1672 && !cs->cidmode
1673 && list_empty(&cs->temp_at_states)
1674 && cs->mode == M_CID) {
1675 sequence = SEQ_UMMODE;
1676 at_state = &cs->at_state;
1677 for (i = 0; i < cs->channels; ++i) {
1678 bcs = cs->bcs + i;
1679 if (bcs->at_state.pending_commands ||
1680 bcs->at_state.cid > 0) {
1681 sequence = SEQ_NONE;
1682 break;
1683 }
1684 }
1685 }
1686 spin_unlock_irqrestore(&cs->lock, flags);
1687 cs->at_state.pending_commands &= ~PC_UMMODE;
1688 if (sequence != SEQ_NONE) {
1689 schedule_sequence(cs, at_state, sequence);
1690 return;
1691 }
1692
1693 for (i = 0; i < cs->channels; ++i) {
1694 bcs = cs->bcs + i;
1695 if (bcs->at_state.pending_commands & PC_HUP) {
1696 bcs->at_state.pending_commands &= ~PC_HUP;
1697 if (bcs->at_state.pending_commands & PC_CID) {
1698 /* not yet dialing: PC_NOCID is sufficient */
1699 bcs->at_state.pending_commands |= PC_NOCID;
1700 bcs->at_state.pending_commands &= ~PC_CID;
1701 } else {
1702 schedule_sequence(cs, &bcs->at_state, SEQ_HUP);
1703 return;
1704 }
1705 }
1706 if (bcs->at_state.pending_commands & PC_NOCID) {
1707 bcs->at_state.pending_commands &= ~PC_NOCID;
1708 cs->curchannel = bcs->channel;
1709 schedule_sequence(cs, &cs->at_state, SEQ_NOCID);
1710 return;
1711 } else if (bcs->at_state.pending_commands & PC_DLE0) {
1712 bcs->at_state.pending_commands &= ~PC_DLE0;
1713 cs->curchannel = bcs->channel;
1714 schedule_sequence(cs, &cs->at_state, SEQ_DLE0);
1715 return;
1716 }
1717 }
1718
1719 list_for_each_entry(at_state, &cs->temp_at_states, list)
1720 if (at_state->pending_commands & PC_HUP) {
1721 at_state->pending_commands &= ~PC_HUP;
1722 schedule_sequence(cs, at_state, SEQ_HUP);
1723 return;
1724 }
1725
1726 if (cs->at_state.pending_commands & PC_INIT) {
1727 cs->at_state.pending_commands &= ~PC_INIT;
1728 cs->dle = 0;
1729 cs->inbuf->inputstate = INS_command;
1730 schedule_sequence(cs, &cs->at_state, SEQ_INIT);
1731 return;
1732 }
1733 if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1734 cs->at_state.pending_commands &= ~PC_SHUTDOWN;
1735 schedule_sequence(cs, &cs->at_state, SEQ_SHUTDOWN);
1736 return;
1737 }
1738 if (cs->at_state.pending_commands & PC_CIDMODE) {
1739 cs->at_state.pending_commands &= ~PC_CIDMODE;
1740 if (cs->mode == M_UNIMODEM) {
1741 cs->retry_count = 1;
1742 schedule_sequence(cs, &cs->at_state, SEQ_CIDMODE);
1743 return;
1744 }
1745 }
1746
1747 for (i = 0; i < cs->channels; ++i) {
1748 bcs = cs->bcs + i;
1749 if (bcs->at_state.pending_commands & PC_DLE1) {
1750 bcs->at_state.pending_commands &= ~PC_DLE1;
1751 cs->curchannel = bcs->channel;
1752 schedule_sequence(cs, &cs->at_state, SEQ_DLE1);
1753 return;
1754 }
1755 if (bcs->at_state.pending_commands & PC_ACCEPT) {
1756 bcs->at_state.pending_commands &= ~PC_ACCEPT;
1757 schedule_sequence(cs, &bcs->at_state, SEQ_ACCEPT);
1758 return;
1759 }
1760 if (bcs->at_state.pending_commands & PC_DIAL) {
1761 bcs->at_state.pending_commands &= ~PC_DIAL;
1762 schedule_sequence(cs, &bcs->at_state, SEQ_DIAL);
1763 return;
1764 }
1765 if (bcs->at_state.pending_commands & PC_CID) {
1766 switch (cs->mode) {
1767 case M_UNIMODEM:
1768 cs->at_state.pending_commands |= PC_CIDMODE;
1769 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1770 cs->commands_pending = 1;
1771 return;
1772 case M_UNKNOWN:
1773 schedule_init(cs, MS_INIT);
1774 return;
1775 }
1776 bcs->at_state.pending_commands &= ~PC_CID;
1777 cs->curchannel = bcs->channel;
1778 cs->retry_count = 2;
1779 schedule_sequence(cs, &cs->at_state, SEQ_CID);
1780 return;
1781 }
1782 }
1783 }
1784
1785 static void process_events(struct cardstate *cs)
1786 {
1787 struct event_t *ev;
1788 unsigned head, tail;
1789 int i;
1790 int check_flags = 0;
1791 int was_busy;
1792 unsigned long flags;
1793
1794 spin_lock_irqsave(&cs->ev_lock, flags);
1795 head = cs->ev_head;
1796
1797 for (i = 0; i < 2 * MAX_EVENTS; ++i) {
1798 tail = cs->ev_tail;
1799 if (tail == head) {
1800 if (!check_flags && !cs->commands_pending)
1801 break;
1802 check_flags = 0;
1803 spin_unlock_irqrestore(&cs->ev_lock, flags);
1804 process_command_flags(cs);
1805 spin_lock_irqsave(&cs->ev_lock, flags);
1806 tail = cs->ev_tail;
1807 if (tail == head) {
1808 if (!cs->commands_pending)
1809 break;
1810 continue;
1811 }
1812 }
1813
1814 ev = cs->events + head;
1815 was_busy = cs->cur_at_seq != SEQ_NONE;
1816 spin_unlock_irqrestore(&cs->ev_lock, flags);
1817 process_event(cs, ev);
1818 spin_lock_irqsave(&cs->ev_lock, flags);
1819 kfree(ev->ptr);
1820 ev->ptr = NULL;
1821 if (was_busy && cs->cur_at_seq == SEQ_NONE)
1822 check_flags = 1;
1823
1824 head = (head + 1) % MAX_EVENTS;
1825 cs->ev_head = head;
1826 }
1827
1828 spin_unlock_irqrestore(&cs->ev_lock, flags);
1829
1830 if (i == 2 * MAX_EVENTS) {
1831 dev_err(cs->dev,
1832 "infinite loop in process_events; aborting.\n");
1833 }
1834 }
1835
1836 /* tasklet scheduled on any event received from the Gigaset device
1837 * parameter:
1838 * data ISDN controller state structure
1839 */
1840 void gigaset_handle_event(unsigned long data)
1841 {
1842 struct cardstate *cs = (struct cardstate *) data;
1843
1844 /* handle incoming data on control/common channel */
1845 if (cs->inbuf->head != cs->inbuf->tail) {
1846 gig_dbg(DEBUG_INTR, "processing new data");
1847 cs->ops->handle_input(cs->inbuf);
1848 }
1849
1850 process_events(cs);
1851 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree