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isdn/gigaset: honor CAPI application's buffer size request
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / isdn / gigaset / ev-layer.c
blob206c380c52358c724aa72a06ce6c7405d9ff7164
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_EVENT, "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_EVENT, "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 argv[0] = cs->respdata;
521 params = 1;
522 if (cs->at_state.getstring) {
523 /* getstring only allowed without cid at the moment */
524 cs->at_state.getstring = 0;
525 rawstring = 1;
526 cid = 0;
527 } else {
528 /* parse line */
529 for (i = 0; i < len; i++)
530 switch (cs->respdata[i]) {
531 case ';':
532 case ',':
533 case '=':
534 if (params > MAX_REC_PARAMS) {
535 dev_warn(cs->dev,
536 "too many parameters in response\n");
537 /* need last parameter (might be CID) */
538 params--;
539 }
540 argv[params++] = cs->respdata + i + 1;
541 }
542
543 rawstring = 0;
544 cid = params > 1 ? cid_of_response(argv[params-1]) : 0;
545 if (cid < 0) {
546 gigaset_add_event(cs, &cs->at_state, RSP_INVAL,
547 NULL, 0, NULL);
548 return;
549 }
550
551 for (j = 1; j < params; ++j)
552 argv[j][-1] = 0;
553
554 gig_dbg(DEBUG_EVENT, "CMD received: %s", argv[0]);
555 if (cid) {
556 --params;
557 gig_dbg(DEBUG_EVENT, "CID: %s", argv[params]);
558 }
559 gig_dbg(DEBUG_EVENT, "available params: %d", params - 1);
560 for (j = 1; j < params; j++)
561 gig_dbg(DEBUG_EVENT, "param %d: %s", j, argv[j]);
562 }
563
564 spin_lock_irqsave(&cs->ev_lock, flags);
565 head = cs->ev_head;
566 tail = cs->ev_tail;
567
568 abort = 1;
569 curarg = 0;
570 while (curarg < params) {
571 next = (tail + 1) % MAX_EVENTS;
572 if (unlikely(next == head)) {
573 dev_err(cs->dev, "event queue full\n");
574 break;
575 }
576
577 event = cs->events + tail;
578 event->at_state = NULL;
579 event->cid = cid;
580 event->ptr = NULL;
581 event->arg = NULL;
582 tail = next;
583
584 if (rawstring) {
585 resp_code = RSP_STRING;
586 param_type = RT_STRING;
587 } else {
588 for (rt = resp_type; rt->response; ++rt)
589 if (!strcmp(argv[curarg], rt->response))
590 break;
591
592 if (!rt->response) {
593 event->type = RSP_UNKNOWN;
594 dev_warn(cs->dev,
595 "unknown modem response: %s\n",
596 argv[curarg]);
597 break;
598 }
599
600 resp_code = rt->resp_code;
601 param_type = rt->type;
602 ++curarg;
603 }
604
605 event->type = resp_code;
606
607 switch (param_type) {
608 case RT_NOTHING:
609 break;
610 case RT_RING:
611 if (!cid) {
612 dev_err(cs->dev,
613 "received RING without CID!\n");
614 event->type = RSP_INVAL;
615 abort = 1;
616 } else {
617 event->cid = 0;
618 event->parameter = cid;
619 abort = 0;
620 }
621 break;
622 case RT_ZSAU:
623 if (curarg >= params) {
624 event->parameter = ZSAU_NONE;
625 break;
626 }
627 for (zr = zsau_resp; zr->str; ++zr)
628 if (!strcmp(argv[curarg], zr->str))
629 break;
630 event->parameter = zr->code;
631 if (!zr->str)
632 dev_warn(cs->dev,
633 "%s: unknown parameter %s after ZSAU\n",
634 __func__, argv[curarg]);
635 ++curarg;
636 break;
637 case RT_STRING:
638 if (curarg < params) {
639 event->ptr = kstrdup(argv[curarg], GFP_ATOMIC);
640 if (!event->ptr)
641 dev_err(cs->dev, "out of memory\n");
642 ++curarg;
643 }
644 gig_dbg(DEBUG_EVENT, "string==%s",
645 event->ptr ? (char *) event->ptr : "NULL");
646 break;
647 case RT_ZCAU:
648 event->parameter = -1;
649 if (curarg + 1 < params) {
650 i = isdn_gethex(argv[curarg]);
651 j = isdn_gethex(argv[curarg + 1]);
652 if (i >= 0 && i < 256 && j >= 0 && j < 256)
653 event->parameter = (unsigned) i << 8
654 | j;
655 curarg += 2;
656 } else
657 curarg = params - 1;
658 break;
659 case RT_NUMBER:
660 case RT_HEX:
661 if (curarg < params) {
662 if (param_type == RT_HEX)
663 event->parameter =
664 isdn_gethex(argv[curarg]);
665 else
666 event->parameter =
667 isdn_getnum(argv[curarg]);
668 ++curarg;
669 } else
670 event->parameter = -1;
671 gig_dbg(DEBUG_EVENT, "parameter==%d", event->parameter);
672 break;
673 }
674
675 if (resp_code == RSP_ZDLE)
676 cs->dle = event->parameter;
677
678 if (abort)
679 break;
680 }
681
682 cs->ev_tail = tail;
683 spin_unlock_irqrestore(&cs->ev_lock, flags);
684
685 if (curarg != params)
686 gig_dbg(DEBUG_EVENT,
687 "invalid number of processed parameters: %d/%d",
688 curarg, params);
689 }
690 EXPORT_SYMBOL_GPL(gigaset_handle_modem_response);
691
692 /* disconnect
693 * process closing of connection associated with given AT state structure
694 */
695 static void disconnect(struct at_state_t **at_state_p)
696 {
697 unsigned long flags;
698 struct bc_state *bcs = (*at_state_p)->bcs;
699 struct cardstate *cs = (*at_state_p)->cs;
700
701 spin_lock_irqsave(&cs->lock, flags);
702 ++(*at_state_p)->seq_index;
703
704 /* revert to selected idle mode */
705 if (!cs->cidmode) {
706 cs->at_state.pending_commands |= PC_UMMODE;
707 gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
708 cs->commands_pending = 1;
709 }
710 spin_unlock_irqrestore(&cs->lock, flags);
711
712 if (bcs) {
713 /* B channel assigned: invoke hardware specific handler */
714 cs->ops->close_bchannel(bcs);
715 /* notify LL */
716 if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
717 bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
718 gigaset_isdn_hupD(bcs);
719 }
720 } else {
721 /* no B channel assigned: just deallocate */
722 spin_lock_irqsave(&cs->lock, flags);
723 list_del(&(*at_state_p)->list);
724 kfree(*at_state_p);
725 *at_state_p = NULL;
726 spin_unlock_irqrestore(&cs->lock, flags);
727 }
728 }
729
730 /* get_free_channel
731 * get a free AT state structure: either one of those associated with the
732 * B channels of the Gigaset device, or if none of those is available,
733 * a newly allocated one with bcs=NULL
734 * The structure should be freed by calling disconnect() after use.
735 */
736 static inline struct at_state_t *get_free_channel(struct cardstate *cs,
737 int cid)
738 /* cids: >0: siemens-cid
739 0: without cid
740 -1: no cid assigned yet
741 */
742 {
743 unsigned long flags;
744 int i;
745 struct at_state_t *ret;
746
747 for (i = 0; i < cs->channels; ++i)
748 if (gigaset_get_channel(cs->bcs + i)) {
749 ret = &cs->bcs[i].at_state;
750 ret->cid = cid;
751 return ret;
752 }
753
754 spin_lock_irqsave(&cs->lock, flags);
755 ret = kmalloc(sizeof(struct at_state_t), GFP_ATOMIC);
756 if (ret) {
757 gigaset_at_init(ret, NULL, cs, cid);
758 list_add(&ret->list, &cs->temp_at_states);
759 }
760 spin_unlock_irqrestore(&cs->lock, flags);
761 return ret;
762 }
763
764 static void init_failed(struct cardstate *cs, int mode)
765 {
766 int i;
767 struct at_state_t *at_state;
768
769 cs->at_state.pending_commands &= ~PC_INIT;
770 cs->mode = mode;
771 cs->mstate = MS_UNINITIALIZED;
772 gigaset_free_channels(cs);
773 for (i = 0; i < cs->channels; ++i) {
774 at_state = &cs->bcs[i].at_state;
775 if (at_state->pending_commands & PC_CID) {
776 at_state->pending_commands &= ~PC_CID;
777 at_state->pending_commands |= PC_NOCID;
778 cs->commands_pending = 1;
779 }
780 }
781 }
782
783 static void schedule_init(struct cardstate *cs, int state)
784 {
785 if (cs->at_state.pending_commands & PC_INIT) {
786 gig_dbg(DEBUG_EVENT, "not scheduling PC_INIT again");
787 return;
788 }
789 cs->mstate = state;
790 cs->mode = M_UNKNOWN;
791 gigaset_block_channels(cs);
792 cs->at_state.pending_commands |= PC_INIT;
793 gig_dbg(DEBUG_EVENT, "Scheduling PC_INIT");
794 cs->commands_pending = 1;
795 }
796
797 /* Add "AT" to a command, add the cid, dle encode it, send the result to the
798 hardware. */
799 static void send_command(struct cardstate *cs, const char *cmd, int cid,
800 int dle, gfp_t kmallocflags)
801 {
802 size_t cmdlen, buflen;
803 char *cmdpos, *cmdbuf, *cmdtail;
804
805 cmdlen = strlen(cmd);
806 buflen = 11 + cmdlen;
807 if (unlikely(buflen <= cmdlen)) {
808 dev_err(cs->dev, "integer overflow in buflen\n");
809 return;
810 }
811
812 cmdbuf = kmalloc(buflen, kmallocflags);
813 if (unlikely(!cmdbuf)) {
814 dev_err(cs->dev, "out of memory\n");
815 return;
816 }
817
818 cmdpos = cmdbuf + 9;
819 cmdtail = cmdpos + cmdlen;
820 memcpy(cmdpos, cmd, cmdlen);
821
822 if (cid > 0 && cid <= 65535) {
823 do {
824 *--cmdpos = '0' + cid % 10;
825 cid /= 10;
826 ++cmdlen;
827 } while (cid);
828 }
829
830 cmdlen += 2;
831 *--cmdpos = 'T';
832 *--cmdpos = 'A';
833
834 if (dle) {
835 cmdlen += 4;
836 *--cmdpos = '(';
837 *--cmdpos = 0x10;
838 *cmdtail++ = 0x10;
839 *cmdtail++ = ')';
840 }
841
842 cs->ops->write_cmd(cs, cmdpos, cmdlen, NULL);
843 kfree(cmdbuf);
844 }
845
846 static struct at_state_t *at_state_from_cid(struct cardstate *cs, int cid)
847 {
848 struct at_state_t *at_state;
849 int i;
850 unsigned long flags;
851
852 if (cid == 0)
853 return &cs->at_state;
854
855 for (i = 0; i < cs->channels; ++i)
856 if (cid == cs->bcs[i].at_state.cid)
857 return &cs->bcs[i].at_state;
858
859 spin_lock_irqsave(&cs->lock, flags);
860
861 list_for_each_entry(at_state, &cs->temp_at_states, list)
862 if (cid == at_state->cid) {
863 spin_unlock_irqrestore(&cs->lock, flags);
864 return at_state;
865 }
866
867 spin_unlock_irqrestore(&cs->lock, flags);
868
869 return NULL;
870 }
871
872 static void bchannel_down(struct bc_state *bcs)
873 {
874 if (bcs->chstate & CHS_B_UP) {
875 bcs->chstate &= ~CHS_B_UP;
876 gigaset_isdn_hupB(bcs);
877 }
878
879 if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
880 bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
881 gigaset_isdn_hupD(bcs);
882 }
883
884 gigaset_free_channel(bcs);
885
886 gigaset_bcs_reinit(bcs);
887 }
888
889 static void bchannel_up(struct bc_state *bcs)
890 {
891 if (bcs->chstate & CHS_B_UP) {
892 dev_notice(bcs->cs->dev, "%s: B channel already up\n",
893 __func__);
894 return;
895 }
896
897 bcs->chstate |= CHS_B_UP;
898 gigaset_isdn_connB(bcs);
899 }
900
901 static void start_dial(struct at_state_t *at_state, void *data,
902 unsigned seq_index)
903 {
904 struct bc_state *bcs = at_state->bcs;
905 struct cardstate *cs = at_state->cs;
906 char **commands = data;
907 unsigned long flags;
908 int i;
909
910 bcs->chstate |= CHS_NOTIFY_LL;
911
912 spin_lock_irqsave(&cs->lock, flags);
913 if (at_state->seq_index != seq_index) {
914 spin_unlock_irqrestore(&cs->lock, flags);
915 goto error;
916 }
917 spin_unlock_irqrestore(&cs->lock, flags);
918
919 for (i = 0; i < AT_NUM; ++i) {
920 kfree(bcs->commands[i]);
921 bcs->commands[i] = commands[i];
922 }
923
924 at_state->pending_commands |= PC_CID;
925 gig_dbg(DEBUG_EVENT, "Scheduling PC_CID");
926 cs->commands_pending = 1;
927 return;
928
929 error:
930 for (i = 0; i < AT_NUM; ++i) {
931 kfree(commands[i]);
932 commands[i] = NULL;
933 }
934 at_state->pending_commands |= PC_NOCID;
935 gig_dbg(DEBUG_EVENT, "Scheduling PC_NOCID");
936 cs->commands_pending = 1;
937 return;
938 }
939
940 static void start_accept(struct at_state_t *at_state)
941 {
942 struct cardstate *cs = at_state->cs;
943 struct bc_state *bcs = at_state->bcs;
944 int i;
945
946 for (i = 0; i < AT_NUM; ++i) {
947 kfree(bcs->commands[i]);
948 bcs->commands[i] = NULL;
949 }
950
951 bcs->commands[AT_PROTO] = kmalloc(9, GFP_ATOMIC);
952 bcs->commands[AT_ISO] = kmalloc(9, GFP_ATOMIC);
953 if (!bcs->commands[AT_PROTO] || !bcs->commands[AT_ISO]) {
954 dev_err(at_state->cs->dev, "out of memory\n");
955 /* error reset */
956 at_state->pending_commands |= PC_HUP;
957 gig_dbg(DEBUG_EVENT, "Scheduling PC_HUP");
958 cs->commands_pending = 1;
959 return;
960 }
961
962 snprintf(bcs->commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
963 snprintf(bcs->commands[AT_ISO], 9, "^SISO=%u\r", bcs->channel + 1);
964
965 at_state->pending_commands |= PC_ACCEPT;
966 gig_dbg(DEBUG_EVENT, "Scheduling PC_ACCEPT");
967 cs->commands_pending = 1;
968 }
969
970 static void do_start(struct cardstate *cs)
971 {
972 gigaset_free_channels(cs);
973
974 if (cs->mstate != MS_LOCKED)
975 schedule_init(cs, MS_INIT);
976
977 cs->isdn_up = 1;
978 gigaset_isdn_start(cs);
979
980 cs->waiting = 0;
981 wake_up(&cs->waitqueue);
982 }
983
984 static void finish_shutdown(struct cardstate *cs)
985 {
986 if (cs->mstate != MS_LOCKED) {
987 cs->mstate = MS_UNINITIALIZED;
988 cs->mode = M_UNKNOWN;
989 }
990
991 /* Tell the LL that the device is not available .. */
992 if (cs->isdn_up) {
993 cs->isdn_up = 0;
994 gigaset_isdn_stop(cs);
995 }
996
997 /* The rest is done by cleanup_cs () in user mode. */
998
999 cs->cmd_result = -ENODEV;
1000 cs->waiting = 0;
1001 wake_up(&cs->waitqueue);
1002 }
1003
1004 static void do_shutdown(struct cardstate *cs)
1005 {
1006 gigaset_block_channels(cs);
1007
1008 if (cs->mstate == MS_READY) {
1009 cs->mstate = MS_SHUTDOWN;
1010 cs->at_state.pending_commands |= PC_SHUTDOWN;
1011 gig_dbg(DEBUG_EVENT, "Scheduling PC_SHUTDOWN");
1012 cs->commands_pending = 1;
1013 } else
1014 finish_shutdown(cs);
1015 }
1016
1017 static void do_stop(struct cardstate *cs)
1018 {
1019 unsigned long flags;
1020
1021 spin_lock_irqsave(&cs->lock, flags);
1022 cs->connected = 0;
1023 spin_unlock_irqrestore(&cs->lock, flags);
1024
1025 do_shutdown(cs);
1026 }
1027
1028 /* Entering cid mode or getting a cid failed:
1029 * try to initialize the device and try again.
1030 *
1031 * channel >= 0: getting cid for the channel failed
1032 * channel < 0: entering cid mode failed
1033 *
1034 * returns 0 on failure
1035 */
1036 static int reinit_and_retry(struct cardstate *cs, int channel)
1037 {
1038 int i;
1039
1040 if (--cs->retry_count <= 0)
1041 return 0;
1042
1043 for (i = 0; i < cs->channels; ++i)
1044 if (cs->bcs[i].at_state.cid > 0)
1045 return 0;
1046
1047 if (channel < 0)
1048 dev_warn(cs->dev,
1049 "Could not enter cid mode. Reinit device and try again.\n");
1050 else {
1051 dev_warn(cs->dev,
1052 "Could not get a call id. Reinit device and try again.\n");
1053 cs->bcs[channel].at_state.pending_commands |= PC_CID;
1054 }
1055 schedule_init(cs, MS_INIT);
1056 return 1;
1057 }
1058
1059 static int at_state_invalid(struct cardstate *cs,
1060 struct at_state_t *test_ptr)
1061 {
1062 unsigned long flags;
1063 unsigned channel;
1064 struct at_state_t *at_state;
1065 int retval = 0;
1066
1067 spin_lock_irqsave(&cs->lock, flags);
1068
1069 if (test_ptr == &cs->at_state)
1070 goto exit;
1071
1072 list_for_each_entry(at_state, &cs->temp_at_states, list)
1073 if (at_state == test_ptr)
1074 goto exit;
1075
1076 for (channel = 0; channel < cs->channels; ++channel)
1077 if (&cs->bcs[channel].at_state == test_ptr)
1078 goto exit;
1079
1080 retval = 1;
1081 exit:
1082 spin_unlock_irqrestore(&cs->lock, flags);
1083 return retval;
1084 }
1085
1086 static void handle_icall(struct cardstate *cs, struct bc_state *bcs,
1087 struct at_state_t **p_at_state)
1088 {
1089 int retval;
1090 struct at_state_t *at_state = *p_at_state;
1091
1092 retval = gigaset_isdn_icall(at_state);
1093 switch (retval) {
1094 case ICALL_ACCEPT:
1095 break;
1096 default:
1097 dev_err(cs->dev, "internal error: disposition=%d\n", retval);
1098 /* --v-- fall through --v-- */
1099 case ICALL_IGNORE:
1100 case ICALL_REJECT:
1101 /* hang up actively
1102 * Device doc says that would reject the call.
1103 * In fact it doesn't.
1104 */
1105 at_state->pending_commands |= PC_HUP;
1106 cs->commands_pending = 1;
1107 break;
1108 }
1109 }
1110
1111 static int do_lock(struct cardstate *cs)
1112 {
1113 int mode;
1114 int i;
1115
1116 switch (cs->mstate) {
1117 case MS_UNINITIALIZED:
1118 case MS_READY:
1119 if (cs->cur_at_seq || !list_empty(&cs->temp_at_states) ||
1120 cs->at_state.pending_commands)
1121 return -EBUSY;
1122
1123 for (i = 0; i < cs->channels; ++i)
1124 if (cs->bcs[i].at_state.pending_commands)
1125 return -EBUSY;
1126
1127 if (!gigaset_get_channels(cs))
1128 return -EBUSY;
1129
1130 break;
1131 case MS_LOCKED:
1132 break;
1133 default:
1134 return -EBUSY;
1135 }
1136
1137 mode = cs->mode;
1138 cs->mstate = MS_LOCKED;
1139 cs->mode = M_UNKNOWN;
1140
1141 return mode;
1142 }
1143
1144 static int do_unlock(struct cardstate *cs)
1145 {
1146 if (cs->mstate != MS_LOCKED)
1147 return -EINVAL;
1148
1149 cs->mstate = MS_UNINITIALIZED;
1150 cs->mode = M_UNKNOWN;
1151 gigaset_free_channels(cs);
1152 if (cs->connected)
1153 schedule_init(cs, MS_INIT);
1154
1155 return 0;
1156 }
1157
1158 static void do_action(int action, struct cardstate *cs,
1159 struct bc_state *bcs,
1160 struct at_state_t **p_at_state, char **pp_command,
1161 int *p_genresp, int *p_resp_code,
1162 struct event_t *ev)
1163 {
1164 struct at_state_t *at_state = *p_at_state;
1165 struct at_state_t *at_state2;
1166 unsigned long flags;
1167
1168 int channel;
1169
1170 unsigned char *s, *e;
1171 int i;
1172 unsigned long val;
1173
1174 switch (action) {
1175 case ACT_NOTHING:
1176 break;
1177 case ACT_TIMEOUT:
1178 at_state->waiting = 1;
1179 break;
1180 case ACT_INIT:
1181 cs->at_state.pending_commands &= ~PC_INIT;
1182 cs->cur_at_seq = SEQ_NONE;
1183 cs->mode = M_UNIMODEM;
1184 spin_lock_irqsave(&cs->lock, flags);
1185 if (!cs->cidmode) {
1186 spin_unlock_irqrestore(&cs->lock, flags);
1187 gigaset_free_channels(cs);
1188 cs->mstate = MS_READY;
1189 break;
1190 }
1191 spin_unlock_irqrestore(&cs->lock, flags);
1192 cs->at_state.pending_commands |= PC_CIDMODE;
1193 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1194 cs->commands_pending = 1;
1195 break;
1196 case ACT_FAILINIT:
1197 dev_warn(cs->dev, "Could not initialize the device.\n");
1198 cs->dle = 0;
1199 init_failed(cs, M_UNKNOWN);
1200 cs->cur_at_seq = SEQ_NONE;
1201 break;
1202 case ACT_CONFIGMODE:
1203 init_failed(cs, M_CONFIG);
1204 cs->cur_at_seq = SEQ_NONE;
1205 break;
1206 case ACT_SETDLE1:
1207 cs->dle = 1;
1208 /* cs->inbuf[0].inputstate |= INS_command | INS_DLE_command; */
1209 cs->inbuf[0].inputstate &=
1210 ~(INS_command | INS_DLE_command);
1211 break;
1212 case ACT_SETDLE0:
1213 cs->dle = 0;
1214 cs->inbuf[0].inputstate =
1215 (cs->inbuf[0].inputstate & ~INS_DLE_command)
1216 | INS_command;
1217 break;
1218 case ACT_CMODESET:
1219 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1220 gigaset_free_channels(cs);
1221 cs->mstate = MS_READY;
1222 }
1223 cs->mode = M_CID;
1224 cs->cur_at_seq = SEQ_NONE;
1225 break;
1226 case ACT_UMODESET:
1227 cs->mode = M_UNIMODEM;
1228 cs->cur_at_seq = SEQ_NONE;
1229 break;
1230 case ACT_FAILCMODE:
1231 cs->cur_at_seq = SEQ_NONE;
1232 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1233 init_failed(cs, M_UNKNOWN);
1234 break;
1235 }
1236 if (!reinit_and_retry(cs, -1))
1237 schedule_init(cs, MS_RECOVER);
1238 break;
1239 case ACT_FAILUMODE:
1240 cs->cur_at_seq = SEQ_NONE;
1241 schedule_init(cs, MS_RECOVER);
1242 break;
1243 case ACT_HUPMODEM:
1244 /* send "+++" (hangup in unimodem mode) */
1245 if (cs->connected)
1246 cs->ops->write_cmd(cs, "+++", 3, NULL);
1247 break;
1248 case ACT_RING:
1249 /* get fresh AT state structure for new CID */
1250 at_state2 = get_free_channel(cs, ev->parameter);
1251 if (!at_state2) {
1252 dev_warn(cs->dev,
1253 "RING ignored: could not allocate channel structure\n");
1254 break;
1255 }
1256
1257 /* initialize AT state structure
1258 * note that bcs may be NULL if no B channel is free
1259 */
1260 at_state2->ConState = 700;
1261 for (i = 0; i < STR_NUM; ++i) {
1262 kfree(at_state2->str_var[i]);
1263 at_state2->str_var[i] = NULL;
1264 }
1265 at_state2->int_var[VAR_ZCTP] = -1;
1266
1267 spin_lock_irqsave(&cs->lock, flags);
1268 at_state2->timer_expires = RING_TIMEOUT;
1269 at_state2->timer_active = 1;
1270 spin_unlock_irqrestore(&cs->lock, flags);
1271 break;
1272 case ACT_ICALL:
1273 handle_icall(cs, bcs, p_at_state);
1274 break;
1275 case ACT_FAILSDOWN:
1276 dev_warn(cs->dev, "Could not shut down the device.\n");
1277 /* fall through */
1278 case ACT_FAKESDOWN:
1279 case ACT_SDOWN:
1280 cs->cur_at_seq = SEQ_NONE;
1281 finish_shutdown(cs);
1282 break;
1283 case ACT_CONNECT:
1284 if (cs->onechannel) {
1285 at_state->pending_commands |= PC_DLE1;
1286 cs->commands_pending = 1;
1287 break;
1288 }
1289 bcs->chstate |= CHS_D_UP;
1290 gigaset_isdn_connD(bcs);
1291 cs->ops->init_bchannel(bcs);
1292 break;
1293 case ACT_DLE1:
1294 cs->cur_at_seq = SEQ_NONE;
1295 bcs = cs->bcs + cs->curchannel;
1296
1297 bcs->chstate |= CHS_D_UP;
1298 gigaset_isdn_connD(bcs);
1299 cs->ops->init_bchannel(bcs);
1300 break;
1301 case ACT_FAKEHUP:
1302 at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
1303 /* fall through */
1304 case ACT_DISCONNECT:
1305 cs->cur_at_seq = SEQ_NONE;
1306 at_state->cid = -1;
1307 if (bcs && cs->onechannel && cs->dle) {
1308 /* Check for other open channels not needed:
1309 * DLE only used for M10x with one B channel.
1310 */
1311 at_state->pending_commands |= PC_DLE0;
1312 cs->commands_pending = 1;
1313 } else
1314 disconnect(p_at_state);
1315 break;
1316 case ACT_FAKEDLE0:
1317 at_state->int_var[VAR_ZDLE] = 0;
1318 cs->dle = 0;
1319 /* fall through */
1320 case ACT_DLE0:
1321 cs->cur_at_seq = SEQ_NONE;
1322 at_state2 = &cs->bcs[cs->curchannel].at_state;
1323 disconnect(&at_state2);
1324 break;
1325 case ACT_ABORTHUP:
1326 cs->cur_at_seq = SEQ_NONE;
1327 dev_warn(cs->dev, "Could not hang up.\n");
1328 at_state->cid = -1;
1329 if (bcs && cs->onechannel)
1330 at_state->pending_commands |= PC_DLE0;
1331 else
1332 disconnect(p_at_state);
1333 schedule_init(cs, MS_RECOVER);
1334 break;
1335 case ACT_FAILDLE0:
1336 cs->cur_at_seq = SEQ_NONE;
1337 dev_warn(cs->dev, "Could not leave DLE mode.\n");
1338 at_state2 = &cs->bcs[cs->curchannel].at_state;
1339 disconnect(&at_state2);
1340 schedule_init(cs, MS_RECOVER);
1341 break;
1342 case ACT_FAILDLE1:
1343 cs->cur_at_seq = SEQ_NONE;
1344 dev_warn(cs->dev,
1345 "Could not enter DLE mode. Trying to hang up.\n");
1346 channel = cs->curchannel;
1347 cs->bcs[channel].at_state.pending_commands |= PC_HUP;
1348 cs->commands_pending = 1;
1349 break;
1350
1351 case ACT_CID: /* got cid; start dialing */
1352 cs->cur_at_seq = SEQ_NONE;
1353 channel = cs->curchannel;
1354 if (ev->parameter > 0 && ev->parameter <= 65535) {
1355 cs->bcs[channel].at_state.cid = ev->parameter;
1356 cs->bcs[channel].at_state.pending_commands |=
1357 PC_DIAL;
1358 cs->commands_pending = 1;
1359 break;
1360 }
1361 /* fall through */
1362 case ACT_FAILCID:
1363 cs->cur_at_seq = SEQ_NONE;
1364 channel = cs->curchannel;
1365 if (!reinit_and_retry(cs, channel)) {
1366 dev_warn(cs->dev,
1367 "Could not get a call ID. Cannot dial.\n");
1368 at_state2 = &cs->bcs[channel].at_state;
1369 disconnect(&at_state2);
1370 }
1371 break;
1372 case ACT_ABORTCID:
1373 cs->cur_at_seq = SEQ_NONE;
1374 at_state2 = &cs->bcs[cs->curchannel].at_state;
1375 disconnect(&at_state2);
1376 break;
1377
1378 case ACT_DIALING:
1379 case ACT_ACCEPTED:
1380 cs->cur_at_seq = SEQ_NONE;
1381 break;
1382
1383 case ACT_ABORTACCEPT: /* hangup/error/timeout during ICALL procssng */
1384 disconnect(p_at_state);
1385 break;
1386
1387 case ACT_ABORTDIAL: /* error/timeout during dial preparation */
1388 cs->cur_at_seq = SEQ_NONE;
1389 at_state->pending_commands |= PC_HUP;
1390 cs->commands_pending = 1;
1391 break;
1392
1393 case ACT_REMOTEREJECT: /* DISCONNECT_IND after dialling */
1394 case ACT_CONNTIMEOUT: /* timeout waiting for ZSAU=ACTIVE */
1395 case ACT_REMOTEHUP: /* DISCONNECT_IND with established connection */
1396 at_state->pending_commands |= PC_HUP;
1397 cs->commands_pending = 1;
1398 break;
1399 case ACT_GETSTRING: /* warning: RING, ZDLE, ...
1400 are not handled properly anymore */
1401 at_state->getstring = 1;
1402 break;
1403 case ACT_SETVER:
1404 if (!ev->ptr) {
1405 *p_genresp = 1;
1406 *p_resp_code = RSP_ERROR;
1407 break;
1408 }
1409 s = ev->ptr;
1410
1411 if (!strcmp(s, "OK")) {
1412 *p_genresp = 1;
1413 *p_resp_code = RSP_ERROR;
1414 break;
1415 }
1416
1417 for (i = 0; i < 4; ++i) {
1418 val = simple_strtoul(s, (char **) &e, 10);
1419 if (val > INT_MAX || e == s)
1420 break;
1421 if (i == 3) {
1422 if (*e)
1423 break;
1424 } else if (*e != '.')
1425 break;
1426 else
1427 s = e + 1;
1428 cs->fwver[i] = val;
1429 }
1430 if (i != 4) {
1431 *p_genresp = 1;
1432 *p_resp_code = RSP_ERROR;
1433 break;
1434 }
1435 /*at_state->getstring = 1;*/
1436 cs->gotfwver = 0;
1437 break;
1438 case ACT_GOTVER:
1439 if (cs->gotfwver == 0) {
1440 cs->gotfwver = 1;
1441 gig_dbg(DEBUG_EVENT,
1442 "firmware version %02d.%03d.%02d.%02d",
1443 cs->fwver[0], cs->fwver[1],
1444 cs->fwver[2], cs->fwver[3]);
1445 break;
1446 }
1447 /* fall through */
1448 case ACT_FAILVER:
1449 cs->gotfwver = -1;
1450 dev_err(cs->dev, "could not read firmware version.\n");
1451 break;
1452 case ACT_ERROR:
1453 gig_dbg(DEBUG_ANY, "%s: ERROR response in ConState %d",
1454 __func__, at_state->ConState);
1455 cs->cur_at_seq = SEQ_NONE;
1456 break;
1457 case ACT_DEBUG:
1458 gig_dbg(DEBUG_ANY, "%s: resp_code %d in ConState %d",
1459 __func__, ev->type, at_state->ConState);
1460 break;
1461 case ACT_WARN:
1462 dev_warn(cs->dev, "%s: resp_code %d in ConState %d!\n",
1463 __func__, ev->type, at_state->ConState);
1464 break;
1465 case ACT_ZCAU:
1466 dev_warn(cs->dev, "cause code %04x in connection state %d.\n",
1467 ev->parameter, at_state->ConState);
1468 break;
1469
1470 /* events from the LL */
1471 case ACT_DIAL:
1472 start_dial(at_state, ev->ptr, ev->parameter);
1473 break;
1474 case ACT_ACCEPT:
1475 start_accept(at_state);
1476 break;
1477 case ACT_HUP:
1478 at_state->pending_commands |= PC_HUP;
1479 gig_dbg(DEBUG_EVENT, "Scheduling PC_HUP");
1480 cs->commands_pending = 1;
1481 break;
1482
1483 /* hotplug events */
1484 case ACT_STOP:
1485 do_stop(cs);
1486 break;
1487 case ACT_START:
1488 do_start(cs);
1489 break;
1490
1491 /* events from the interface */
1492 case ACT_IF_LOCK:
1493 cs->cmd_result = ev->parameter ? do_lock(cs) : do_unlock(cs);
1494 cs->waiting = 0;
1495 wake_up(&cs->waitqueue);
1496 break;
1497 case ACT_IF_VER:
1498 if (ev->parameter != 0)
1499 cs->cmd_result = -EINVAL;
1500 else if (cs->gotfwver != 1) {
1501 cs->cmd_result = -ENOENT;
1502 } else {
1503 memcpy(ev->arg, cs->fwver, sizeof cs->fwver);
1504 cs->cmd_result = 0;
1505 }
1506 cs->waiting = 0;
1507 wake_up(&cs->waitqueue);
1508 break;
1509
1510 /* events from the proc file system */
1511 case ACT_PROC_CIDMODE:
1512 spin_lock_irqsave(&cs->lock, flags);
1513 if (ev->parameter != cs->cidmode) {
1514 cs->cidmode = ev->parameter;
1515 if (ev->parameter) {
1516 cs->at_state.pending_commands |= PC_CIDMODE;
1517 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1518 } else {
1519 cs->at_state.pending_commands |= PC_UMMODE;
1520 gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
1521 }
1522 cs->commands_pending = 1;
1523 }
1524 spin_unlock_irqrestore(&cs->lock, flags);
1525 cs->waiting = 0;
1526 wake_up(&cs->waitqueue);
1527 break;
1528
1529 /* events from the hardware drivers */
1530 case ACT_NOTIFY_BC_DOWN:
1531 bchannel_down(bcs);
1532 break;
1533 case ACT_NOTIFY_BC_UP:
1534 bchannel_up(bcs);
1535 break;
1536 case ACT_SHUTDOWN:
1537 do_shutdown(cs);
1538 break;
1539
1540
1541 default:
1542 if (action >= ACT_CMD && action < ACT_CMD + AT_NUM) {
1543 *pp_command = at_state->bcs->commands[action - ACT_CMD];
1544 if (!*pp_command) {
1545 *p_genresp = 1;
1546 *p_resp_code = RSP_NULL;
1547 }
1548 } else
1549 dev_err(cs->dev, "%s: action==%d!\n", __func__, action);
1550 }
1551 }
1552
1553 /* State machine to do the calling and hangup procedure */
1554 static void process_event(struct cardstate *cs, struct event_t *ev)
1555 {
1556 struct bc_state *bcs;
1557 char *p_command = NULL;
1558 struct reply_t *rep;
1559 int rcode;
1560 int genresp = 0;
1561 int resp_code = RSP_ERROR;
1562 int sendcid;
1563 struct at_state_t *at_state;
1564 int index;
1565 int curact;
1566 unsigned long flags;
1567
1568 if (ev->cid >= 0) {
1569 at_state = at_state_from_cid(cs, ev->cid);
1570 if (!at_state) {
1571 gig_dbg(DEBUG_EVENT, "event %d for invalid cid %d",
1572 ev->type, ev->cid);
1573 gigaset_add_event(cs, &cs->at_state, RSP_WRONG_CID,
1574 NULL, 0, NULL);
1575 return;
1576 }
1577 } else {
1578 at_state = ev->at_state;
1579 if (at_state_invalid(cs, at_state)) {
1580 gig_dbg(DEBUG_EVENT, "event for invalid at_state %p",
1581 at_state);
1582 return;
1583 }
1584 }
1585
1586 gig_dbg(DEBUG_EVENT, "connection state %d, event %d",
1587 at_state->ConState, ev->type);
1588
1589 bcs = at_state->bcs;
1590 sendcid = at_state->cid;
1591
1592 /* Setting the pointer to the dial array */
1593 rep = at_state->replystruct;
1594
1595 spin_lock_irqsave(&cs->lock, flags);
1596 if (ev->type == EV_TIMEOUT) {
1597 if (ev->parameter != at_state->timer_index
1598 || !at_state->timer_active) {
1599 ev->type = RSP_NONE; /* old timeout */
1600 gig_dbg(DEBUG_EVENT, "old timeout");
1601 } else if (!at_state->waiting)
1602 gig_dbg(DEBUG_EVENT, "timeout occurred");
1603 else
1604 gig_dbg(DEBUG_EVENT, "stopped waiting");
1605 }
1606 spin_unlock_irqrestore(&cs->lock, flags);
1607
1608 /* if the response belongs to a variable in at_state->int_var[VAR_XXXX]
1609 or at_state->str_var[STR_XXXX], set it */
1610 if (ev->type >= RSP_VAR && ev->type < RSP_VAR + VAR_NUM) {
1611 index = ev->type - RSP_VAR;
1612 at_state->int_var[index] = ev->parameter;
1613 } else if (ev->type >= RSP_STR && ev->type < RSP_STR + STR_NUM) {
1614 index = ev->type - RSP_STR;
1615 kfree(at_state->str_var[index]);
1616 at_state->str_var[index] = ev->ptr;
1617 ev->ptr = NULL; /* prevent process_events() from
1618 deallocating ptr */
1619 }
1620
1621 if (ev->type == EV_TIMEOUT || ev->type == RSP_STRING)
1622 at_state->getstring = 0;
1623
1624 /* Search row in dial array which matches modem response and current
1625 constate */
1626 for (;; rep++) {
1627 rcode = rep->resp_code;
1628 if (rcode == RSP_LAST) {
1629 /* found nothing...*/
1630 dev_warn(cs->dev, "%s: rcode=RSP_LAST: "
1631 "resp_code %d in ConState %d!\n",
1632 __func__, ev->type, at_state->ConState);
1633 return;
1634 }
1635 if ((rcode == RSP_ANY || rcode == ev->type)
1636 && ((int) at_state->ConState >= rep->min_ConState)
1637 && (rep->max_ConState < 0
1638 || (int) at_state->ConState <= rep->max_ConState)
1639 && (rep->parameter < 0 || rep->parameter == ev->parameter))
1640 break;
1641 }
1642
1643 p_command = rep->command;
1644
1645 at_state->waiting = 0;
1646 for (curact = 0; curact < MAXACT; ++curact) {
1647 /* The row tells us what we should do ..
1648 */
1649 do_action(rep->action[curact], cs, bcs, &at_state, &p_command,
1650 &genresp, &resp_code, ev);
1651 if (!at_state)
1652 break; /* may be freed after disconnect */
1653 }
1654
1655 if (at_state) {
1656 /* Jump to the next con-state regarding the array */
1657 if (rep->new_ConState >= 0)
1658 at_state->ConState = rep->new_ConState;
1659
1660 if (genresp) {
1661 spin_lock_irqsave(&cs->lock, flags);
1662 at_state->timer_expires = 0;
1663 at_state->timer_active = 0;
1664 spin_unlock_irqrestore(&cs->lock, flags);
1665 gigaset_add_event(cs, at_state, resp_code,
1666 NULL, 0, NULL);
1667 } else {
1668 /* Send command to modem if not NULL... */
1669 if (p_command) {
1670 if (cs->connected)
1671 send_command(cs, p_command,
1672 sendcid, cs->dle,
1673 GFP_ATOMIC);
1674 else
1675 gigaset_add_event(cs, at_state,
1676 RSP_NODEV,
1677 NULL, 0, NULL);
1678 }
1679
1680 spin_lock_irqsave(&cs->lock, flags);
1681 if (!rep->timeout) {
1682 at_state->timer_expires = 0;
1683 at_state->timer_active = 0;
1684 } else if (rep->timeout > 0) { /* new timeout */
1685 at_state->timer_expires = rep->timeout * 10;
1686 at_state->timer_active = 1;
1687 ++at_state->timer_index;
1688 }
1689 spin_unlock_irqrestore(&cs->lock, flags);
1690 }
1691 }
1692 }
1693
1694 static void schedule_sequence(struct cardstate *cs,
1695 struct at_state_t *at_state, int sequence)
1696 {
1697 cs->cur_at_seq = sequence;
1698 gigaset_add_event(cs, at_state, RSP_INIT, NULL, sequence, NULL);
1699 }
1700
1701 static void process_command_flags(struct cardstate *cs)
1702 {
1703 struct at_state_t *at_state = NULL;
1704 struct bc_state *bcs;
1705 int i;
1706 int sequence;
1707 unsigned long flags;
1708
1709 cs->commands_pending = 0;
1710
1711 if (cs->cur_at_seq) {
1712 gig_dbg(DEBUG_EVENT, "not searching scheduled commands: busy");
1713 return;
1714 }
1715
1716 gig_dbg(DEBUG_EVENT, "searching scheduled commands");
1717
1718 sequence = SEQ_NONE;
1719
1720 /* clear pending_commands and hangup channels on shutdown */
1721 if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1722 cs->at_state.pending_commands &= ~PC_CIDMODE;
1723 for (i = 0; i < cs->channels; ++i) {
1724 bcs = cs->bcs + i;
1725 at_state = &bcs->at_state;
1726 at_state->pending_commands &=
1727 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1728 if (at_state->cid > 0)
1729 at_state->pending_commands |= PC_HUP;
1730 if (at_state->pending_commands & PC_CID) {
1731 at_state->pending_commands |= PC_NOCID;
1732 at_state->pending_commands &= ~PC_CID;
1733 }
1734 }
1735 }
1736
1737 /* clear pending_commands and hangup channels on reset */
1738 if (cs->at_state.pending_commands & PC_INIT) {
1739 cs->at_state.pending_commands &= ~PC_CIDMODE;
1740 for (i = 0; i < cs->channels; ++i) {
1741 bcs = cs->bcs + i;
1742 at_state = &bcs->at_state;
1743 at_state->pending_commands &=
1744 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1745 if (at_state->cid > 0)
1746 at_state->pending_commands |= PC_HUP;
1747 if (cs->mstate == MS_RECOVER) {
1748 if (at_state->pending_commands & PC_CID) {
1749 at_state->pending_commands |= PC_NOCID;
1750 at_state->pending_commands &= ~PC_CID;
1751 }
1752 }
1753 }
1754 }
1755
1756 /* only switch back to unimodem mode if no commands are pending and
1757 * no channels are up */
1758 spin_lock_irqsave(&cs->lock, flags);
1759 if (cs->at_state.pending_commands == PC_UMMODE
1760 && !cs->cidmode
1761 && list_empty(&cs->temp_at_states)
1762 && cs->mode == M_CID) {
1763 sequence = SEQ_UMMODE;
1764 at_state = &cs->at_state;
1765 for (i = 0; i < cs->channels; ++i) {
1766 bcs = cs->bcs + i;
1767 if (bcs->at_state.pending_commands ||
1768 bcs->at_state.cid > 0) {
1769 sequence = SEQ_NONE;
1770 break;
1771 }
1772 }
1773 }
1774 spin_unlock_irqrestore(&cs->lock, flags);
1775 cs->at_state.pending_commands &= ~PC_UMMODE;
1776 if (sequence != SEQ_NONE) {
1777 schedule_sequence(cs, at_state, sequence);
1778 return;
1779 }
1780
1781 for (i = 0; i < cs->channels; ++i) {
1782 bcs = cs->bcs + i;
1783 if (bcs->at_state.pending_commands & PC_HUP) {
1784 bcs->at_state.pending_commands &= ~PC_HUP;
1785 if (bcs->at_state.pending_commands & PC_CID) {
1786 /* not yet dialing: PC_NOCID is sufficient */
1787 bcs->at_state.pending_commands |= PC_NOCID;
1788 bcs->at_state.pending_commands &= ~PC_CID;
1789 } else {
1790 schedule_sequence(cs, &bcs->at_state, SEQ_HUP);
1791 return;
1792 }
1793 }
1794 if (bcs->at_state.pending_commands & PC_NOCID) {
1795 bcs->at_state.pending_commands &= ~PC_NOCID;
1796 cs->curchannel = bcs->channel;
1797 schedule_sequence(cs, &cs->at_state, SEQ_NOCID);
1798 return;
1799 } else if (bcs->at_state.pending_commands & PC_DLE0) {
1800 bcs->at_state.pending_commands &= ~PC_DLE0;
1801 cs->curchannel = bcs->channel;
1802 schedule_sequence(cs, &cs->at_state, SEQ_DLE0);
1803 return;
1804 }
1805 }
1806
1807 list_for_each_entry(at_state, &cs->temp_at_states, list)
1808 if (at_state->pending_commands & PC_HUP) {
1809 at_state->pending_commands &= ~PC_HUP;
1810 schedule_sequence(cs, at_state, SEQ_HUP);
1811 return;
1812 }
1813
1814 if (cs->at_state.pending_commands & PC_INIT) {
1815 cs->at_state.pending_commands &= ~PC_INIT;
1816 cs->dle = 0;
1817 cs->inbuf->inputstate = INS_command;
1818 schedule_sequence(cs, &cs->at_state, SEQ_INIT);
1819 return;
1820 }
1821 if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1822 cs->at_state.pending_commands &= ~PC_SHUTDOWN;
1823 schedule_sequence(cs, &cs->at_state, SEQ_SHUTDOWN);
1824 return;
1825 }
1826 if (cs->at_state.pending_commands & PC_CIDMODE) {
1827 cs->at_state.pending_commands &= ~PC_CIDMODE;
1828 if (cs->mode == M_UNIMODEM) {
1829 cs->retry_count = 1;
1830 schedule_sequence(cs, &cs->at_state, SEQ_CIDMODE);
1831 return;
1832 }
1833 }
1834
1835 for (i = 0; i < cs->channels; ++i) {
1836 bcs = cs->bcs + i;
1837 if (bcs->at_state.pending_commands & PC_DLE1) {
1838 bcs->at_state.pending_commands &= ~PC_DLE1;
1839 cs->curchannel = bcs->channel;
1840 schedule_sequence(cs, &cs->at_state, SEQ_DLE1);
1841 return;
1842 }
1843 if (bcs->at_state.pending_commands & PC_ACCEPT) {
1844 bcs->at_state.pending_commands &= ~PC_ACCEPT;
1845 schedule_sequence(cs, &bcs->at_state, SEQ_ACCEPT);
1846 return;
1847 }
1848 if (bcs->at_state.pending_commands & PC_DIAL) {
1849 bcs->at_state.pending_commands &= ~PC_DIAL;
1850 schedule_sequence(cs, &bcs->at_state, SEQ_DIAL);
1851 return;
1852 }
1853 if (bcs->at_state.pending_commands & PC_CID) {
1854 switch (cs->mode) {
1855 case M_UNIMODEM:
1856 cs->at_state.pending_commands |= PC_CIDMODE;
1857 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1858 cs->commands_pending = 1;
1859 return;
1860 #ifdef GIG_MAYINITONDIAL
1861 case M_UNKNOWN:
1862 schedule_init(cs, MS_INIT);
1863 return;
1864 #endif
1865 }
1866 bcs->at_state.pending_commands &= ~PC_CID;
1867 cs->curchannel = bcs->channel;
1868 #ifdef GIG_RETRYCID
1869 cs->retry_count = 2;
1870 #else
1871 cs->retry_count = 1;
1872 #endif
1873 schedule_sequence(cs, &cs->at_state, SEQ_CID);
1874 return;
1875 }
1876 }
1877 }
1878
1879 static void process_events(struct cardstate *cs)
1880 {
1881 struct event_t *ev;
1882 unsigned head, tail;
1883 int i;
1884 int check_flags = 0;
1885 int was_busy;
1886 unsigned long flags;
1887
1888 spin_lock_irqsave(&cs->ev_lock, flags);
1889 head = cs->ev_head;
1890
1891 for (i = 0; i < 2 * MAX_EVENTS; ++i) {
1892 tail = cs->ev_tail;
1893 if (tail == head) {
1894 if (!check_flags && !cs->commands_pending)
1895 break;
1896 check_flags = 0;
1897 spin_unlock_irqrestore(&cs->ev_lock, flags);
1898 process_command_flags(cs);
1899 spin_lock_irqsave(&cs->ev_lock, flags);
1900 tail = cs->ev_tail;
1901 if (tail == head) {
1902 if (!cs->commands_pending)
1903 break;
1904 continue;
1905 }
1906 }
1907
1908 ev = cs->events + head;
1909 was_busy = cs->cur_at_seq != SEQ_NONE;
1910 spin_unlock_irqrestore(&cs->ev_lock, flags);
1911 process_event(cs, ev);
1912 spin_lock_irqsave(&cs->ev_lock, flags);
1913 kfree(ev->ptr);
1914 ev->ptr = NULL;
1915 if (was_busy && cs->cur_at_seq == SEQ_NONE)
1916 check_flags = 1;
1917
1918 head = (head + 1) % MAX_EVENTS;
1919 cs->ev_head = head;
1920 }
1921
1922 spin_unlock_irqrestore(&cs->ev_lock, flags);
1923
1924 if (i == 2 * MAX_EVENTS) {
1925 dev_err(cs->dev,
1926 "infinite loop in process_events; aborting.\n");
1927 }
1928 }
1929
1930 /* tasklet scheduled on any event received from the Gigaset device
1931 * parameter:
1932 * data ISDN controller state structure
1933 */
1934 void gigaset_handle_event(unsigned long data)
1935 {
1936 struct cardstate *cs = (struct cardstate *) data;
1937
1938 /* handle incoming data on control/common channel */
1939 if (cs->inbuf->head != cs->inbuf->tail) {
1940 gig_dbg(DEBUG_INTR, "processing new data");
1941 cs->ops->handle_input(cs->inbuf);
1942 }
1943
1944 process_events(cs);
1945 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree