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sg_start_req(): use import_iovec()
[deliverable/linux.git] / drivers / isdn / gigaset / ev-layer.c
1 /*
2 * Stuff used by all variants of the driver
3 *
4 * Copyright (c) 2001 by Stefan Eilers,
5 * Hansjoerg Lipp <hjlipp@web.de>,
6 * Tilman Schmidt <tilman@imap.cc>.
7 *
8 * =====================================================================
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
13 * =====================================================================
14 */
15
16 #include <linux/export.h>
17 #include "gigaset.h"
18
19 /* ========================================================== */
20 /* bit masks for pending commands */
21 #define PC_DIAL 0x001
22 #define PC_HUP 0x002
23 #define PC_INIT 0x004
24 #define PC_DLE0 0x008
25 #define PC_DLE1 0x010
26 #define PC_SHUTDOWN 0x020
27 #define PC_ACCEPT 0x040
28 #define PC_CID 0x080
29 #define PC_NOCID 0x100
30 #define PC_CIDMODE 0x200
31 #define PC_UMMODE 0x400
32
33 /* types of modem responses */
34 #define RT_NOTHING 0
35 #define RT_ZSAU 1
36 #define RT_RING 2
37 #define RT_NUMBER 3
38 #define RT_STRING 4
39 #define RT_ZCAU 6
40
41 /* Possible ASCII responses */
42 #define RSP_OK 0
43 #define RSP_ERROR 1
44 #define RSP_ZGCI 3
45 #define RSP_RING 4
46 #define RSP_ZVLS 5
47 #define RSP_ZCAU 6
48
49 /* responses with values to store in at_state */
50 /* - numeric */
51 #define RSP_VAR 100
52 #define RSP_ZSAU (RSP_VAR + VAR_ZSAU)
53 #define RSP_ZDLE (RSP_VAR + VAR_ZDLE)
54 #define RSP_ZCTP (RSP_VAR + VAR_ZCTP)
55 /* - string */
56 #define RSP_STR (RSP_VAR + VAR_NUM)
57 #define RSP_NMBR (RSP_STR + STR_NMBR)
58 #define RSP_ZCPN (RSP_STR + STR_ZCPN)
59 #define RSP_ZCON (RSP_STR + STR_ZCON)
60 #define RSP_ZBC (RSP_STR + STR_ZBC)
61 #define RSP_ZHLC (RSP_STR + STR_ZHLC)
62
63 #define RSP_WRONG_CID -2 /* unknown cid in cmd */
64 #define RSP_INVAL -6 /* invalid response */
65 #define RSP_NODEV -9 /* device not connected */
66
67 #define RSP_NONE -19
68 #define RSP_STRING -20
69 #define RSP_NULL -21
70 #define RSP_INIT -27
71 #define RSP_ANY -26
72 #define RSP_LAST -28
73
74 /* actions for process_response */
75 #define ACT_NOTHING 0
76 #define ACT_SETDLE1 1
77 #define ACT_SETDLE0 2
78 #define ACT_FAILINIT 3
79 #define ACT_HUPMODEM 4
80 #define ACT_CONFIGMODE 5
81 #define ACT_INIT 6
82 #define ACT_DLE0 7
83 #define ACT_DLE1 8
84 #define ACT_FAILDLE0 9
85 #define ACT_FAILDLE1 10
86 #define ACT_RING 11
87 #define ACT_CID 12
88 #define ACT_FAILCID 13
89 #define ACT_SDOWN 14
90 #define ACT_FAILSDOWN 15
91 #define ACT_DEBUG 16
92 #define ACT_WARN 17
93 #define ACT_DIALING 18
94 #define ACT_ABORTDIAL 19
95 #define ACT_DISCONNECT 20
96 #define ACT_CONNECT 21
97 #define ACT_REMOTEREJECT 22
98 #define ACT_CONNTIMEOUT 23
99 #define ACT_REMOTEHUP 24
100 #define ACT_ABORTHUP 25
101 #define ACT_ICALL 26
102 #define ACT_ACCEPTED 27
103 #define ACT_ABORTACCEPT 28
104 #define ACT_TIMEOUT 29
105 #define ACT_GETSTRING 30
106 #define ACT_SETVER 31
107 #define ACT_FAILVER 32
108 #define ACT_GOTVER 33
109 #define ACT_TEST 34
110 #define ACT_ERROR 35
111 #define ACT_ABORTCID 36
112 #define ACT_ZCAU 37
113 #define ACT_NOTIFY_BC_DOWN 38
114 #define ACT_NOTIFY_BC_UP 39
115 #define ACT_DIAL 40
116 #define ACT_ACCEPT 41
117 #define ACT_HUP 43
118 #define ACT_IF_LOCK 44
119 #define ACT_START 45
120 #define ACT_STOP 46
121 #define ACT_FAKEDLE0 47
122 #define ACT_FAKEHUP 48
123 #define ACT_FAKESDOWN 49
124 #define ACT_SHUTDOWN 50
125 #define ACT_PROC_CIDMODE 51
126 #define ACT_UMODESET 52
127 #define ACT_FAILUMODE 53
128 #define ACT_CMODESET 54
129 #define ACT_FAILCMODE 55
130 #define ACT_IF_VER 56
131 #define ACT_CMD 100
132
133 /* at command sequences */
134 #define SEQ_NONE 0
135 #define SEQ_INIT 100
136 #define SEQ_DLE0 200
137 #define SEQ_DLE1 250
138 #define SEQ_CID 300
139 #define SEQ_NOCID 350
140 #define SEQ_HUP 400
141 #define SEQ_DIAL 600
142 #define SEQ_ACCEPT 720
143 #define SEQ_SHUTDOWN 500
144 #define SEQ_CIDMODE 10
145 #define SEQ_UMMODE 11
146
147
148 /* 100: init, 200: dle0, 250:dle1, 300: get cid (dial), 350: "hup" (no cid),
149 * 400: hup, 500: reset, 600: dial, 700: ring */
150 struct reply_t gigaset_tab_nocid[] =
151 {
152 /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout,
153 * action, command */
154
155 /* initialize device, set cid mode if possible */
156 {RSP_INIT, -1, -1, SEQ_INIT, 100, 1, {ACT_TIMEOUT} },
157
158 {EV_TIMEOUT, 100, 100, -1, 101, 3, {0}, "Z\r"},
159 {RSP_OK, 101, 103, -1, 120, 5, {ACT_GETSTRING},
160 "+GMR\r"},
161
162 {EV_TIMEOUT, 101, 101, -1, 102, 5, {0}, "Z\r"},
163 {RSP_ERROR, 101, 101, -1, 102, 5, {0}, "Z\r"},
164
165 {EV_TIMEOUT, 102, 102, -1, 108, 5, {ACT_SETDLE1},
166 "^SDLE=0\r"},
167 {RSP_OK, 108, 108, -1, 104, -1},
168 {RSP_ZDLE, 104, 104, 0, 103, 5, {0}, "Z\r"},
169 {EV_TIMEOUT, 104, 104, -1, 0, 0, {ACT_FAILINIT} },
170 {RSP_ERROR, 108, 108, -1, 0, 0, {ACT_FAILINIT} },
171
172 {EV_TIMEOUT, 108, 108, -1, 105, 2, {ACT_SETDLE0,
173 ACT_HUPMODEM,
174 ACT_TIMEOUT} },
175 {EV_TIMEOUT, 105, 105, -1, 103, 5, {0}, "Z\r"},
176
177 {RSP_ERROR, 102, 102, -1, 107, 5, {0}, "^GETPRE\r"},
178 {RSP_OK, 107, 107, -1, 0, 0, {ACT_CONFIGMODE} },
179 {RSP_ERROR, 107, 107, -1, 0, 0, {ACT_FAILINIT} },
180 {EV_TIMEOUT, 107, 107, -1, 0, 0, {ACT_FAILINIT} },
181
182 {RSP_ERROR, 103, 103, -1, 0, 0, {ACT_FAILINIT} },
183 {EV_TIMEOUT, 103, 103, -1, 0, 0, {ACT_FAILINIT} },
184
185 {RSP_STRING, 120, 120, -1, 121, -1, {ACT_SETVER} },
186
187 {EV_TIMEOUT, 120, 121, -1, 0, 0, {ACT_FAILVER,
188 ACT_INIT} },
189 {RSP_ERROR, 120, 121, -1, 0, 0, {ACT_FAILVER,
190 ACT_INIT} },
191 {RSP_OK, 121, 121, -1, 0, 0, {ACT_GOTVER,
192 ACT_INIT} },
193 {RSP_NONE, 121, 121, -1, 120, 0, {ACT_GETSTRING} },
194
195 /* leave dle mode */
196 {RSP_INIT, 0, 0, SEQ_DLE0, 201, 5, {0}, "^SDLE=0\r"},
197 {RSP_OK, 201, 201, -1, 202, -1},
198 {RSP_ZDLE, 202, 202, 0, 0, 0, {ACT_DLE0} },
199 {RSP_NODEV, 200, 249, -1, 0, 0, {ACT_FAKEDLE0} },
200 {RSP_ERROR, 200, 249, -1, 0, 0, {ACT_FAILDLE0} },
201 {EV_TIMEOUT, 200, 249, -1, 0, 0, {ACT_FAILDLE0} },
202
203 /* enter dle mode */
204 {RSP_INIT, 0, 0, SEQ_DLE1, 251, 5, {0}, "^SDLE=1\r"},
205 {RSP_OK, 251, 251, -1, 252, -1},
206 {RSP_ZDLE, 252, 252, 1, 0, 0, {ACT_DLE1} },
207 {RSP_ERROR, 250, 299, -1, 0, 0, {ACT_FAILDLE1} },
208 {EV_TIMEOUT, 250, 299, -1, 0, 0, {ACT_FAILDLE1} },
209
210 /* incoming call */
211 {RSP_RING, -1, -1, -1, -1, -1, {ACT_RING} },
212
213 /* get cid */
214 {RSP_INIT, 0, 0, SEQ_CID, 301, 5, {0}, "^SGCI?\r"},
215 {RSP_OK, 301, 301, -1, 302, -1},
216 {RSP_ZGCI, 302, 302, -1, 0, 0, {ACT_CID} },
217 {RSP_ERROR, 301, 349, -1, 0, 0, {ACT_FAILCID} },
218 {EV_TIMEOUT, 301, 349, -1, 0, 0, {ACT_FAILCID} },
219
220 /* enter cid mode */
221 {RSP_INIT, 0, 0, SEQ_CIDMODE, 150, 5, {0}, "^SGCI=1\r"},
222 {RSP_OK, 150, 150, -1, 0, 0, {ACT_CMODESET} },
223 {RSP_ERROR, 150, 150, -1, 0, 0, {ACT_FAILCMODE} },
224 {EV_TIMEOUT, 150, 150, -1, 0, 0, {ACT_FAILCMODE} },
225
226 /* leave cid mode */
227 {RSP_INIT, 0, 0, SEQ_UMMODE, 160, 5, {0}, "Z\r"},
228 {RSP_OK, 160, 160, -1, 0, 0, {ACT_UMODESET} },
229 {RSP_ERROR, 160, 160, -1, 0, 0, {ACT_FAILUMODE} },
230 {EV_TIMEOUT, 160, 160, -1, 0, 0, {ACT_FAILUMODE} },
231
232 /* abort getting cid */
233 {RSP_INIT, 0, 0, SEQ_NOCID, 0, 0, {ACT_ABORTCID} },
234
235 /* reset */
236 {RSP_INIT, 0, 0, SEQ_SHUTDOWN, 504, 5, {0}, "Z\r"},
237 {RSP_OK, 504, 504, -1, 0, 0, {ACT_SDOWN} },
238 {RSP_ERROR, 501, 599, -1, 0, 0, {ACT_FAILSDOWN} },
239 {EV_TIMEOUT, 501, 599, -1, 0, 0, {ACT_FAILSDOWN} },
240 {RSP_NODEV, 501, 599, -1, 0, 0, {ACT_FAKESDOWN} },
241
242 {EV_PROC_CIDMODE, -1, -1, -1, -1, -1, {ACT_PROC_CIDMODE} },
243 {EV_IF_LOCK, -1, -1, -1, -1, -1, {ACT_IF_LOCK} },
244 {EV_IF_VER, -1, -1, -1, -1, -1, {ACT_IF_VER} },
245 {EV_START, -1, -1, -1, -1, -1, {ACT_START} },
246 {EV_STOP, -1, -1, -1, -1, -1, {ACT_STOP} },
247 {EV_SHUTDOWN, -1, -1, -1, -1, -1, {ACT_SHUTDOWN} },
248
249 /* misc. */
250 {RSP_ERROR, -1, -1, -1, -1, -1, {ACT_ERROR} },
251 {RSP_ZCAU, -1, -1, -1, -1, -1, {ACT_ZCAU} },
252 {RSP_NONE, -1, -1, -1, -1, -1, {ACT_DEBUG} },
253 {RSP_ANY, -1, -1, -1, -1, -1, {ACT_WARN} },
254 {RSP_LAST}
255 };
256
257 /* 600: start dialing, 650: dial in progress, 800: connection is up, 700: ring,
258 * 400: hup, 750: accepted icall */
259 struct reply_t gigaset_tab_cid[] =
260 {
261 /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout,
262 * action, command */
263
264 /* dial */
265 {EV_DIAL, -1, -1, -1, -1, -1, {ACT_DIAL} },
266 {RSP_INIT, 0, 0, SEQ_DIAL, 601, 5, {ACT_CMD + AT_BC} },
267 {RSP_OK, 601, 601, -1, 603, 5, {ACT_CMD + AT_PROTO} },
268 {RSP_OK, 603, 603, -1, 604, 5, {ACT_CMD + AT_TYPE} },
269 {RSP_OK, 604, 604, -1, 605, 5, {ACT_CMD + AT_MSN} },
270 {RSP_NULL, 605, 605, -1, 606, 5, {ACT_CMD + AT_CLIP} },
271 {RSP_OK, 605, 605, -1, 606, 5, {ACT_CMD + AT_CLIP} },
272 {RSP_NULL, 606, 606, -1, 607, 5, {ACT_CMD + AT_ISO} },
273 {RSP_OK, 606, 606, -1, 607, 5, {ACT_CMD + AT_ISO} },
274 {RSP_OK, 607, 607, -1, 608, 5, {0}, "+VLS=17\r"},
275 {RSP_OK, 608, 608, -1, 609, -1},
276 {RSP_ZSAU, 609, 609, ZSAU_PROCEEDING, 610, 5, {ACT_CMD + AT_DIAL} },
277 {RSP_OK, 610, 610, -1, 650, 0, {ACT_DIALING} },
278
279 {RSP_ERROR, 601, 610, -1, 0, 0, {ACT_ABORTDIAL} },
280 {EV_TIMEOUT, 601, 610, -1, 0, 0, {ACT_ABORTDIAL} },
281
282 /* optional dialing responses */
283 {EV_BC_OPEN, 650, 650, -1, 651, -1},
284 {RSP_ZVLS, 609, 651, 17, -1, -1, {ACT_DEBUG} },
285 {RSP_ZCTP, 610, 651, -1, -1, -1, {ACT_DEBUG} },
286 {RSP_ZCPN, 610, 651, -1, -1, -1, {ACT_DEBUG} },
287 {RSP_ZSAU, 650, 651, ZSAU_CALL_DELIVERED, -1, -1, {ACT_DEBUG} },
288
289 /* connect */
290 {RSP_ZSAU, 650, 650, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT} },
291 {RSP_ZSAU, 651, 651, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT,
292 ACT_NOTIFY_BC_UP} },
293 {RSP_ZSAU, 750, 750, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT} },
294 {RSP_ZSAU, 751, 751, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT,
295 ACT_NOTIFY_BC_UP} },
296 {EV_BC_OPEN, 800, 800, -1, 800, -1, {ACT_NOTIFY_BC_UP} },
297
298 /* remote hangup */
299 {RSP_ZSAU, 650, 651, ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEREJECT} },
300 {RSP_ZSAU, 750, 751, ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEHUP} },
301 {RSP_ZSAU, 800, 800, ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEHUP} },
302
303 /* hangup */
304 {EV_HUP, -1, -1, -1, -1, -1, {ACT_HUP} },
305 {RSP_INIT, -1, -1, SEQ_HUP, 401, 5, {0}, "+VLS=0\r"},
306 {RSP_OK, 401, 401, -1, 402, 5},
307 {RSP_ZVLS, 402, 402, 0, 403, 5},
308 {RSP_ZSAU, 403, 403, ZSAU_DISCONNECT_REQ, -1, -1, {ACT_DEBUG} },
309 {RSP_ZSAU, 403, 403, ZSAU_NULL, 0, 0, {ACT_DISCONNECT} },
310 {RSP_NODEV, 401, 403, -1, 0, 0, {ACT_FAKEHUP} },
311 {RSP_ERROR, 401, 401, -1, 0, 0, {ACT_ABORTHUP} },
312 {EV_TIMEOUT, 401, 403, -1, 0, 0, {ACT_ABORTHUP} },
313
314 {EV_BC_CLOSED, 0, 0, -1, 0, -1, {ACT_NOTIFY_BC_DOWN} },
315
316 /* ring */
317 {RSP_ZBC, 700, 700, -1, -1, -1, {0} },
318 {RSP_ZHLC, 700, 700, -1, -1, -1, {0} },
319 {RSP_NMBR, 700, 700, -1, -1, -1, {0} },
320 {RSP_ZCPN, 700, 700, -1, -1, -1, {0} },
321 {RSP_ZCTP, 700, 700, -1, -1, -1, {0} },
322 {EV_TIMEOUT, 700, 700, -1, 720, 720, {ACT_ICALL} },
323 {EV_BC_CLOSED, 720, 720, -1, 0, -1, {ACT_NOTIFY_BC_DOWN} },
324
325 /*accept icall*/
326 {EV_ACCEPT, -1, -1, -1, -1, -1, {ACT_ACCEPT} },
327 {RSP_INIT, 720, 720, SEQ_ACCEPT, 721, 5, {ACT_CMD + AT_PROTO} },
328 {RSP_OK, 721, 721, -1, 722, 5, {ACT_CMD + AT_ISO} },
329 {RSP_OK, 722, 722, -1, 723, 5, {0}, "+VLS=17\r"},
330 {RSP_OK, 723, 723, -1, 724, 5, {0} },
331 {RSP_ZVLS, 724, 724, 17, 750, 50, {ACT_ACCEPTED} },
332 {RSP_ERROR, 721, 729, -1, 0, 0, {ACT_ABORTACCEPT} },
333 {EV_TIMEOUT, 721, 729, -1, 0, 0, {ACT_ABORTACCEPT} },
334 {RSP_ZSAU, 700, 729, ZSAU_NULL, 0, 0, {ACT_ABORTACCEPT} },
335 {RSP_ZSAU, 700, 729, ZSAU_ACTIVE, 0, 0, {ACT_ABORTACCEPT} },
336 {RSP_ZSAU, 700, 729, ZSAU_DISCONNECT_IND, 0, 0, {ACT_ABORTACCEPT} },
337
338 {EV_BC_OPEN, 750, 750, -1, 751, -1},
339 {EV_TIMEOUT, 750, 751, -1, 0, 0, {ACT_CONNTIMEOUT} },
340
341 /* B channel closed (general case) */
342 {EV_BC_CLOSED, -1, -1, -1, -1, -1, {ACT_NOTIFY_BC_DOWN} },
343
344 /* misc. */
345 {RSP_ZCON, -1, -1, -1, -1, -1, {ACT_DEBUG} },
346 {RSP_ZCAU, -1, -1, -1, -1, -1, {ACT_ZCAU} },
347 {RSP_NONE, -1, -1, -1, -1, -1, {ACT_DEBUG} },
348 {RSP_ANY, -1, -1, -1, -1, -1, {ACT_WARN} },
349 {RSP_LAST}
350 };
351
352
353 static const struct resp_type_t {
354 char *response;
355 int resp_code;
356 int type;
357 }
358 resp_type[] =
359 {
360 {"OK", RSP_OK, RT_NOTHING},
361 {"ERROR", RSP_ERROR, RT_NOTHING},
362 {"ZSAU", RSP_ZSAU, RT_ZSAU},
363 {"ZCAU", RSP_ZCAU, RT_ZCAU},
364 {"RING", RSP_RING, RT_RING},
365 {"ZGCI", RSP_ZGCI, RT_NUMBER},
366 {"ZVLS", RSP_ZVLS, RT_NUMBER},
367 {"ZCTP", RSP_ZCTP, RT_NUMBER},
368 {"ZDLE", RSP_ZDLE, RT_NUMBER},
369 {"ZHLC", RSP_ZHLC, RT_STRING},
370 {"ZBC", RSP_ZBC, RT_STRING},
371 {"NMBR", RSP_NMBR, RT_STRING},
372 {"ZCPN", RSP_ZCPN, RT_STRING},
373 {"ZCON", RSP_ZCON, RT_STRING},
374 {NULL, 0, 0}
375 };
376
377 static const struct zsau_resp_t {
378 char *str;
379 int code;
380 }
381 zsau_resp[] =
382 {
383 {"OUTGOING_CALL_PROCEEDING", ZSAU_PROCEEDING},
384 {"CALL_DELIVERED", ZSAU_CALL_DELIVERED},
385 {"ACTIVE", ZSAU_ACTIVE},
386 {"DISCONNECT_IND", ZSAU_DISCONNECT_IND},
387 {"NULL", ZSAU_NULL},
388 {"DISCONNECT_REQ", ZSAU_DISCONNECT_REQ},
389 {NULL, ZSAU_UNKNOWN}
390 };
391
392 /* retrieve CID from parsed response
393 * returns 0 if no CID, -1 if invalid CID, or CID value 1..65535
394 */
395 static int cid_of_response(char *s)
396 {
397 int cid;
398 int rc;
399
400 if (s[-1] != ';')
401 return 0; /* no CID separator */
402 rc = kstrtoint(s, 10, &cid);
403 if (rc)
404 return 0; /* CID not numeric */
405 if (cid < 1 || cid > 65535)
406 return -1; /* CID out of range */
407 return cid;
408 }
409
410 /**
411 * gigaset_handle_modem_response() - process received modem response
412 * @cs: device descriptor structure.
413 *
414 * Called by asyncdata/isocdata if a block of data received from the
415 * device must be processed as a modem command response. The data is
416 * already in the cs structure.
417 */
418 void gigaset_handle_modem_response(struct cardstate *cs)
419 {
420 unsigned char *argv[MAX_REC_PARAMS + 1];
421 int params;
422 int i, j;
423 const struct resp_type_t *rt;
424 const struct zsau_resp_t *zr;
425 int curarg;
426 unsigned long flags;
427 unsigned next, tail, head;
428 struct event_t *event;
429 int resp_code;
430 int param_type;
431 int abort;
432 size_t len;
433 int cid;
434 int rawstring;
435
436 len = cs->cbytes;
437 if (!len) {
438 /* ignore additional LFs/CRs (M10x config mode or cx100) */
439 gig_dbg(DEBUG_MCMD, "skipped EOL [%02X]", cs->respdata[0]);
440 return;
441 }
442 cs->respdata[len] = 0;
443 argv[0] = cs->respdata;
444 params = 1;
445 if (cs->at_state.getstring) {
446 /* getstring only allowed without cid at the moment */
447 cs->at_state.getstring = 0;
448 rawstring = 1;
449 cid = 0;
450 } else {
451 /* parse line */
452 for (i = 0; i < len; i++)
453 switch (cs->respdata[i]) {
454 case ';':
455 case ',':
456 case '=':
457 if (params > MAX_REC_PARAMS) {
458 dev_warn(cs->dev,
459 "too many parameters in response\n");
460 /* need last parameter (might be CID) */
461 params--;
462 }
463 argv[params++] = cs->respdata + i + 1;
464 }
465
466 rawstring = 0;
467 cid = params > 1 ? cid_of_response(argv[params - 1]) : 0;
468 if (cid < 0) {
469 gigaset_add_event(cs, &cs->at_state, RSP_INVAL,
470 NULL, 0, NULL);
471 return;
472 }
473
474 for (j = 1; j < params; ++j)
475 argv[j][-1] = 0;
476
477 gig_dbg(DEBUG_EVENT, "CMD received: %s", argv[0]);
478 if (cid) {
479 --params;
480 gig_dbg(DEBUG_EVENT, "CID: %s", argv[params]);
481 }
482 gig_dbg(DEBUG_EVENT, "available params: %d", params - 1);
483 for (j = 1; j < params; j++)
484 gig_dbg(DEBUG_EVENT, "param %d: %s", j, argv[j]);
485 }
486
487 spin_lock_irqsave(&cs->ev_lock, flags);
488 head = cs->ev_head;
489 tail = cs->ev_tail;
490
491 abort = 1;
492 curarg = 0;
493 while (curarg < params) {
494 next = (tail + 1) % MAX_EVENTS;
495 if (unlikely(next == head)) {
496 dev_err(cs->dev, "event queue full\n");
497 break;
498 }
499
500 event = cs->events + tail;
501 event->at_state = NULL;
502 event->cid = cid;
503 event->ptr = NULL;
504 event->arg = NULL;
505 tail = next;
506
507 if (rawstring) {
508 resp_code = RSP_STRING;
509 param_type = RT_STRING;
510 } else {
511 for (rt = resp_type; rt->response; ++rt)
512 if (!strcmp(argv[curarg], rt->response))
513 break;
514
515 if (!rt->response) {
516 event->type = RSP_NONE;
517 gig_dbg(DEBUG_EVENT,
518 "unknown modem response: '%s'\n",
519 argv[curarg]);
520 break;
521 }
522
523 resp_code = rt->resp_code;
524 param_type = rt->type;
525 ++curarg;
526 }
527
528 event->type = resp_code;
529
530 switch (param_type) {
531 case RT_NOTHING:
532 break;
533 case RT_RING:
534 if (!cid) {
535 dev_err(cs->dev,
536 "received RING without CID!\n");
537 event->type = RSP_INVAL;
538 abort = 1;
539 } else {
540 event->cid = 0;
541 event->parameter = cid;
542 abort = 0;
543 }
544 break;
545 case RT_ZSAU:
546 if (curarg >= params) {
547 event->parameter = ZSAU_NONE;
548 break;
549 }
550 for (zr = zsau_resp; zr->str; ++zr)
551 if (!strcmp(argv[curarg], zr->str))
552 break;
553 event->parameter = zr->code;
554 if (!zr->str)
555 dev_warn(cs->dev,
556 "%s: unknown parameter %s after ZSAU\n",
557 __func__, argv[curarg]);
558 ++curarg;
559 break;
560 case RT_STRING:
561 if (curarg < params) {
562 event->ptr = kstrdup(argv[curarg], GFP_ATOMIC);
563 if (!event->ptr)
564 dev_err(cs->dev, "out of memory\n");
565 ++curarg;
566 }
567 gig_dbg(DEBUG_EVENT, "string==%s",
568 event->ptr ? (char *) event->ptr : "NULL");
569 break;
570 case RT_ZCAU:
571 event->parameter = -1;
572 if (curarg + 1 < params) {
573 u8 type, value;
574
575 i = kstrtou8(argv[curarg++], 16, &type);
576 j = kstrtou8(argv[curarg++], 16, &value);
577 if (i == 0 && j == 0)
578 event->parameter = (type << 8) | value;
579 } else
580 curarg = params - 1;
581 break;
582 case RT_NUMBER:
583 if (curarg >= params ||
584 kstrtoint(argv[curarg++], 10, &event->parameter))
585 event->parameter = -1;
586 gig_dbg(DEBUG_EVENT, "parameter==%d", event->parameter);
587 break;
588 }
589
590 if (resp_code == RSP_ZDLE)
591 cs->dle = event->parameter;
592
593 if (abort)
594 break;
595 }
596
597 cs->ev_tail = tail;
598 spin_unlock_irqrestore(&cs->ev_lock, flags);
599
600 if (curarg != params)
601 gig_dbg(DEBUG_EVENT,
602 "invalid number of processed parameters: %d/%d",
603 curarg, params);
604 }
605 EXPORT_SYMBOL_GPL(gigaset_handle_modem_response);
606
607 /* disconnect_nobc
608 * process closing of connection associated with given AT state structure
609 * without B channel
610 */
611 static void disconnect_nobc(struct at_state_t **at_state_p,
612 struct cardstate *cs)
613 {
614 unsigned long flags;
615
616 spin_lock_irqsave(&cs->lock, flags);
617 ++(*at_state_p)->seq_index;
618
619 /* revert to selected idle mode */
620 if (!cs->cidmode) {
621 cs->at_state.pending_commands |= PC_UMMODE;
622 gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
623 cs->commands_pending = 1;
624 }
625
626 /* check for and deallocate temporary AT state */
627 if (!list_empty(&(*at_state_p)->list)) {
628 list_del(&(*at_state_p)->list);
629 kfree(*at_state_p);
630 *at_state_p = NULL;
631 }
632
633 spin_unlock_irqrestore(&cs->lock, flags);
634 }
635
636 /* disconnect_bc
637 * process closing of connection associated with given AT state structure
638 * and B channel
639 */
640 static void disconnect_bc(struct at_state_t *at_state,
641 struct cardstate *cs, struct bc_state *bcs)
642 {
643 unsigned long flags;
644
645 spin_lock_irqsave(&cs->lock, flags);
646 ++at_state->seq_index;
647
648 /* revert to selected idle mode */
649 if (!cs->cidmode) {
650 cs->at_state.pending_commands |= PC_UMMODE;
651 gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
652 cs->commands_pending = 1;
653 }
654 spin_unlock_irqrestore(&cs->lock, flags);
655
656 /* invoke hardware specific handler */
657 cs->ops->close_bchannel(bcs);
658
659 /* notify LL */
660 if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
661 bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
662 gigaset_isdn_hupD(bcs);
663 }
664 }
665
666 /* get_free_channel
667 * get a free AT state structure: either one of those associated with the
668 * B channels of the Gigaset device, or if none of those is available,
669 * a newly allocated one with bcs=NULL
670 * The structure should be freed by calling disconnect_nobc() after use.
671 */
672 static inline struct at_state_t *get_free_channel(struct cardstate *cs,
673 int cid)
674 /* cids: >0: siemens-cid
675 * 0: without cid
676 * -1: no cid assigned yet
677 */
678 {
679 unsigned long flags;
680 int i;
681 struct at_state_t *ret;
682
683 for (i = 0; i < cs->channels; ++i)
684 if (gigaset_get_channel(cs->bcs + i) >= 0) {
685 ret = &cs->bcs[i].at_state;
686 ret->cid = cid;
687 return ret;
688 }
689
690 spin_lock_irqsave(&cs->lock, flags);
691 ret = kmalloc(sizeof(struct at_state_t), GFP_ATOMIC);
692 if (ret) {
693 gigaset_at_init(ret, NULL, cs, cid);
694 list_add(&ret->list, &cs->temp_at_states);
695 }
696 spin_unlock_irqrestore(&cs->lock, flags);
697 return ret;
698 }
699
700 static void init_failed(struct cardstate *cs, int mode)
701 {
702 int i;
703 struct at_state_t *at_state;
704
705 cs->at_state.pending_commands &= ~PC_INIT;
706 cs->mode = mode;
707 cs->mstate = MS_UNINITIALIZED;
708 gigaset_free_channels(cs);
709 for (i = 0; i < cs->channels; ++i) {
710 at_state = &cs->bcs[i].at_state;
711 if (at_state->pending_commands & PC_CID) {
712 at_state->pending_commands &= ~PC_CID;
713 at_state->pending_commands |= PC_NOCID;
714 cs->commands_pending = 1;
715 }
716 }
717 }
718
719 static void schedule_init(struct cardstate *cs, int state)
720 {
721 if (cs->at_state.pending_commands & PC_INIT) {
722 gig_dbg(DEBUG_EVENT, "not scheduling PC_INIT again");
723 return;
724 }
725 cs->mstate = state;
726 cs->mode = M_UNKNOWN;
727 gigaset_block_channels(cs);
728 cs->at_state.pending_commands |= PC_INIT;
729 gig_dbg(DEBUG_EVENT, "Scheduling PC_INIT");
730 cs->commands_pending = 1;
731 }
732
733 /* send an AT command
734 * adding the "AT" prefix, cid and DLE encapsulation as appropriate
735 */
736 static void send_command(struct cardstate *cs, const char *cmd,
737 struct at_state_t *at_state)
738 {
739 int cid = at_state->cid;
740 struct cmdbuf_t *cb;
741 size_t buflen;
742
743 buflen = strlen(cmd) + 12; /* DLE ( A T 1 2 3 4 5 <cmd> DLE ) \0 */
744 cb = kmalloc(sizeof(struct cmdbuf_t) + buflen, GFP_ATOMIC);
745 if (!cb) {
746 dev_err(cs->dev, "%s: out of memory\n", __func__);
747 return;
748 }
749 if (cid > 0 && cid <= 65535)
750 cb->len = snprintf(cb->buf, buflen,
751 cs->dle ? "\020(AT%d%s\020)" : "AT%d%s",
752 cid, cmd);
753 else
754 cb->len = snprintf(cb->buf, buflen,
755 cs->dle ? "\020(AT%s\020)" : "AT%s",
756 cmd);
757 cb->offset = 0;
758 cb->next = NULL;
759 cb->wake_tasklet = NULL;
760 cs->ops->write_cmd(cs, cb);
761 }
762
763 static struct at_state_t *at_state_from_cid(struct cardstate *cs, int cid)
764 {
765 struct at_state_t *at_state;
766 int i;
767 unsigned long flags;
768
769 if (cid == 0)
770 return &cs->at_state;
771
772 for (i = 0; i < cs->channels; ++i)
773 if (cid == cs->bcs[i].at_state.cid)
774 return &cs->bcs[i].at_state;
775
776 spin_lock_irqsave(&cs->lock, flags);
777
778 list_for_each_entry(at_state, &cs->temp_at_states, list)
779 if (cid == at_state->cid) {
780 spin_unlock_irqrestore(&cs->lock, flags);
781 return at_state;
782 }
783
784 spin_unlock_irqrestore(&cs->lock, flags);
785
786 return NULL;
787 }
788
789 static void bchannel_down(struct bc_state *bcs)
790 {
791 if (bcs->chstate & CHS_B_UP) {
792 bcs->chstate &= ~CHS_B_UP;
793 gigaset_isdn_hupB(bcs);
794 }
795
796 if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
797 bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
798 gigaset_isdn_hupD(bcs);
799 }
800
801 gigaset_free_channel(bcs);
802
803 gigaset_bcs_reinit(bcs);
804 }
805
806 static void bchannel_up(struct bc_state *bcs)
807 {
808 if (bcs->chstate & CHS_B_UP) {
809 dev_notice(bcs->cs->dev, "%s: B channel already up\n",
810 __func__);
811 return;
812 }
813
814 bcs->chstate |= CHS_B_UP;
815 gigaset_isdn_connB(bcs);
816 }
817
818 static void start_dial(struct at_state_t *at_state, void *data,
819 unsigned seq_index)
820 {
821 struct bc_state *bcs = at_state->bcs;
822 struct cardstate *cs = at_state->cs;
823 char **commands = data;
824 unsigned long flags;
825 int i;
826
827 bcs->chstate |= CHS_NOTIFY_LL;
828
829 spin_lock_irqsave(&cs->lock, flags);
830 if (at_state->seq_index != seq_index) {
831 spin_unlock_irqrestore(&cs->lock, flags);
832 goto error;
833 }
834 spin_unlock_irqrestore(&cs->lock, flags);
835
836 for (i = 0; i < AT_NUM; ++i) {
837 kfree(bcs->commands[i]);
838 bcs->commands[i] = commands[i];
839 }
840
841 at_state->pending_commands |= PC_CID;
842 gig_dbg(DEBUG_EVENT, "Scheduling PC_CID");
843 cs->commands_pending = 1;
844 return;
845
846 error:
847 for (i = 0; i < AT_NUM; ++i) {
848 kfree(commands[i]);
849 commands[i] = NULL;
850 }
851 at_state->pending_commands |= PC_NOCID;
852 gig_dbg(DEBUG_EVENT, "Scheduling PC_NOCID");
853 cs->commands_pending = 1;
854 return;
855 }
856
857 static void start_accept(struct at_state_t *at_state)
858 {
859 struct cardstate *cs = at_state->cs;
860 struct bc_state *bcs = at_state->bcs;
861 int i;
862
863 for (i = 0; i < AT_NUM; ++i) {
864 kfree(bcs->commands[i]);
865 bcs->commands[i] = NULL;
866 }
867
868 bcs->commands[AT_PROTO] = kmalloc(9, GFP_ATOMIC);
869 bcs->commands[AT_ISO] = kmalloc(9, GFP_ATOMIC);
870 if (!bcs->commands[AT_PROTO] || !bcs->commands[AT_ISO]) {
871 dev_err(at_state->cs->dev, "out of memory\n");
872 /* error reset */
873 at_state->pending_commands |= PC_HUP;
874 gig_dbg(DEBUG_EVENT, "Scheduling PC_HUP");
875 cs->commands_pending = 1;
876 return;
877 }
878
879 snprintf(bcs->commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
880 snprintf(bcs->commands[AT_ISO], 9, "^SISO=%u\r", bcs->channel + 1);
881
882 at_state->pending_commands |= PC_ACCEPT;
883 gig_dbg(DEBUG_EVENT, "Scheduling PC_ACCEPT");
884 cs->commands_pending = 1;
885 }
886
887 static void do_start(struct cardstate *cs)
888 {
889 gigaset_free_channels(cs);
890
891 if (cs->mstate != MS_LOCKED)
892 schedule_init(cs, MS_INIT);
893
894 cs->isdn_up = 1;
895 gigaset_isdn_start(cs);
896
897 cs->waiting = 0;
898 wake_up(&cs->waitqueue);
899 }
900
901 static void finish_shutdown(struct cardstate *cs)
902 {
903 if (cs->mstate != MS_LOCKED) {
904 cs->mstate = MS_UNINITIALIZED;
905 cs->mode = M_UNKNOWN;
906 }
907
908 /* Tell the LL that the device is not available .. */
909 if (cs->isdn_up) {
910 cs->isdn_up = 0;
911 gigaset_isdn_stop(cs);
912 }
913
914 /* The rest is done by cleanup_cs() in process context. */
915
916 cs->cmd_result = -ENODEV;
917 cs->waiting = 0;
918 wake_up(&cs->waitqueue);
919 }
920
921 static void do_shutdown(struct cardstate *cs)
922 {
923 gigaset_block_channels(cs);
924
925 if (cs->mstate == MS_READY) {
926 cs->mstate = MS_SHUTDOWN;
927 cs->at_state.pending_commands |= PC_SHUTDOWN;
928 gig_dbg(DEBUG_EVENT, "Scheduling PC_SHUTDOWN");
929 cs->commands_pending = 1;
930 } else
931 finish_shutdown(cs);
932 }
933
934 static void do_stop(struct cardstate *cs)
935 {
936 unsigned long flags;
937
938 spin_lock_irqsave(&cs->lock, flags);
939 cs->connected = 0;
940 spin_unlock_irqrestore(&cs->lock, flags);
941
942 do_shutdown(cs);
943 }
944
945 /* Entering cid mode or getting a cid failed:
946 * try to initialize the device and try again.
947 *
948 * channel >= 0: getting cid for the channel failed
949 * channel < 0: entering cid mode failed
950 *
951 * returns 0 on success, <0 on failure
952 */
953 static int reinit_and_retry(struct cardstate *cs, int channel)
954 {
955 int i;
956
957 if (--cs->retry_count <= 0)
958 return -EFAULT;
959
960 for (i = 0; i < cs->channels; ++i)
961 if (cs->bcs[i].at_state.cid > 0)
962 return -EBUSY;
963
964 if (channel < 0)
965 dev_warn(cs->dev,
966 "Could not enter cid mode. Reinit device and try again.\n");
967 else {
968 dev_warn(cs->dev,
969 "Could not get a call id. Reinit device and try again.\n");
970 cs->bcs[channel].at_state.pending_commands |= PC_CID;
971 }
972 schedule_init(cs, MS_INIT);
973 return 0;
974 }
975
976 static int at_state_invalid(struct cardstate *cs,
977 struct at_state_t *test_ptr)
978 {
979 unsigned long flags;
980 unsigned channel;
981 struct at_state_t *at_state;
982 int retval = 0;
983
984 spin_lock_irqsave(&cs->lock, flags);
985
986 if (test_ptr == &cs->at_state)
987 goto exit;
988
989 list_for_each_entry(at_state, &cs->temp_at_states, list)
990 if (at_state == test_ptr)
991 goto exit;
992
993 for (channel = 0; channel < cs->channels; ++channel)
994 if (&cs->bcs[channel].at_state == test_ptr)
995 goto exit;
996
997 retval = 1;
998 exit:
999 spin_unlock_irqrestore(&cs->lock, flags);
1000 return retval;
1001 }
1002
1003 static void handle_icall(struct cardstate *cs, struct bc_state *bcs,
1004 struct at_state_t *at_state)
1005 {
1006 int retval;
1007
1008 retval = gigaset_isdn_icall(at_state);
1009 switch (retval) {
1010 case ICALL_ACCEPT:
1011 break;
1012 default:
1013 dev_err(cs->dev, "internal error: disposition=%d\n", retval);
1014 /* --v-- fall through --v-- */
1015 case ICALL_IGNORE:
1016 case ICALL_REJECT:
1017 /* hang up actively
1018 * Device doc says that would reject the call.
1019 * In fact it doesn't.
1020 */
1021 at_state->pending_commands |= PC_HUP;
1022 cs->commands_pending = 1;
1023 break;
1024 }
1025 }
1026
1027 static int do_lock(struct cardstate *cs)
1028 {
1029 int mode;
1030 int i;
1031
1032 switch (cs->mstate) {
1033 case MS_UNINITIALIZED:
1034 case MS_READY:
1035 if (cs->cur_at_seq || !list_empty(&cs->temp_at_states) ||
1036 cs->at_state.pending_commands)
1037 return -EBUSY;
1038
1039 for (i = 0; i < cs->channels; ++i)
1040 if (cs->bcs[i].at_state.pending_commands)
1041 return -EBUSY;
1042
1043 if (gigaset_get_channels(cs) < 0)
1044 return -EBUSY;
1045
1046 break;
1047 case MS_LOCKED:
1048 break;
1049 default:
1050 return -EBUSY;
1051 }
1052
1053 mode = cs->mode;
1054 cs->mstate = MS_LOCKED;
1055 cs->mode = M_UNKNOWN;
1056
1057 return mode;
1058 }
1059
1060 static int do_unlock(struct cardstate *cs)
1061 {
1062 if (cs->mstate != MS_LOCKED)
1063 return -EINVAL;
1064
1065 cs->mstate = MS_UNINITIALIZED;
1066 cs->mode = M_UNKNOWN;
1067 gigaset_free_channels(cs);
1068 if (cs->connected)
1069 schedule_init(cs, MS_INIT);
1070
1071 return 0;
1072 }
1073
1074 static void do_action(int action, struct cardstate *cs,
1075 struct bc_state *bcs,
1076 struct at_state_t **p_at_state, char **pp_command,
1077 int *p_genresp, int *p_resp_code,
1078 struct event_t *ev)
1079 {
1080 struct at_state_t *at_state = *p_at_state;
1081 struct bc_state *bcs2;
1082 unsigned long flags;
1083
1084 int channel;
1085
1086 unsigned char *s, *e;
1087 int i;
1088 unsigned long val;
1089
1090 switch (action) {
1091 case ACT_NOTHING:
1092 break;
1093 case ACT_TIMEOUT:
1094 at_state->waiting = 1;
1095 break;
1096 case ACT_INIT:
1097 cs->at_state.pending_commands &= ~PC_INIT;
1098 cs->cur_at_seq = SEQ_NONE;
1099 cs->mode = M_UNIMODEM;
1100 spin_lock_irqsave(&cs->lock, flags);
1101 if (!cs->cidmode) {
1102 spin_unlock_irqrestore(&cs->lock, flags);
1103 gigaset_free_channels(cs);
1104 cs->mstate = MS_READY;
1105 break;
1106 }
1107 spin_unlock_irqrestore(&cs->lock, flags);
1108 cs->at_state.pending_commands |= PC_CIDMODE;
1109 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1110 cs->commands_pending = 1;
1111 break;
1112 case ACT_FAILINIT:
1113 dev_warn(cs->dev, "Could not initialize the device.\n");
1114 cs->dle = 0;
1115 init_failed(cs, M_UNKNOWN);
1116 cs->cur_at_seq = SEQ_NONE;
1117 break;
1118 case ACT_CONFIGMODE:
1119 init_failed(cs, M_CONFIG);
1120 cs->cur_at_seq = SEQ_NONE;
1121 break;
1122 case ACT_SETDLE1:
1123 cs->dle = 1;
1124 /* cs->inbuf[0].inputstate |= INS_command | INS_DLE_command; */
1125 cs->inbuf[0].inputstate &=
1126 ~(INS_command | INS_DLE_command);
1127 break;
1128 case ACT_SETDLE0:
1129 cs->dle = 0;
1130 cs->inbuf[0].inputstate =
1131 (cs->inbuf[0].inputstate & ~INS_DLE_command)
1132 | INS_command;
1133 break;
1134 case ACT_CMODESET:
1135 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1136 gigaset_free_channels(cs);
1137 cs->mstate = MS_READY;
1138 }
1139 cs->mode = M_CID;
1140 cs->cur_at_seq = SEQ_NONE;
1141 break;
1142 case ACT_UMODESET:
1143 cs->mode = M_UNIMODEM;
1144 cs->cur_at_seq = SEQ_NONE;
1145 break;
1146 case ACT_FAILCMODE:
1147 cs->cur_at_seq = SEQ_NONE;
1148 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1149 init_failed(cs, M_UNKNOWN);
1150 break;
1151 }
1152 if (reinit_and_retry(cs, -1) < 0)
1153 schedule_init(cs, MS_RECOVER);
1154 break;
1155 case ACT_FAILUMODE:
1156 cs->cur_at_seq = SEQ_NONE;
1157 schedule_init(cs, MS_RECOVER);
1158 break;
1159 case ACT_HUPMODEM:
1160 /* send "+++" (hangup in unimodem mode) */
1161 if (cs->connected) {
1162 struct cmdbuf_t *cb;
1163
1164 cb = kmalloc(sizeof(struct cmdbuf_t) + 3, GFP_ATOMIC);
1165 if (!cb) {
1166 dev_err(cs->dev, "%s: out of memory\n",
1167 __func__);
1168 return;
1169 }
1170 memcpy(cb->buf, "+++", 3);
1171 cb->len = 3;
1172 cb->offset = 0;
1173 cb->next = NULL;
1174 cb->wake_tasklet = NULL;
1175 cs->ops->write_cmd(cs, cb);
1176 }
1177 break;
1178 case ACT_RING:
1179 /* get fresh AT state structure for new CID */
1180 at_state = get_free_channel(cs, ev->parameter);
1181 if (!at_state) {
1182 dev_warn(cs->dev,
1183 "RING ignored: could not allocate channel structure\n");
1184 break;
1185 }
1186
1187 /* initialize AT state structure
1188 * note that bcs may be NULL if no B channel is free
1189 */
1190 at_state->ConState = 700;
1191 for (i = 0; i < STR_NUM; ++i) {
1192 kfree(at_state->str_var[i]);
1193 at_state->str_var[i] = NULL;
1194 }
1195 at_state->int_var[VAR_ZCTP] = -1;
1196
1197 spin_lock_irqsave(&cs->lock, flags);
1198 at_state->timer_expires = RING_TIMEOUT;
1199 at_state->timer_active = 1;
1200 spin_unlock_irqrestore(&cs->lock, flags);
1201 break;
1202 case ACT_ICALL:
1203 handle_icall(cs, bcs, at_state);
1204 break;
1205 case ACT_FAILSDOWN:
1206 dev_warn(cs->dev, "Could not shut down the device.\n");
1207 /* fall through */
1208 case ACT_FAKESDOWN:
1209 case ACT_SDOWN:
1210 cs->cur_at_seq = SEQ_NONE;
1211 finish_shutdown(cs);
1212 break;
1213 case ACT_CONNECT:
1214 if (cs->onechannel) {
1215 at_state->pending_commands |= PC_DLE1;
1216 cs->commands_pending = 1;
1217 break;
1218 }
1219 bcs->chstate |= CHS_D_UP;
1220 gigaset_isdn_connD(bcs);
1221 cs->ops->init_bchannel(bcs);
1222 break;
1223 case ACT_DLE1:
1224 cs->cur_at_seq = SEQ_NONE;
1225 bcs = cs->bcs + cs->curchannel;
1226
1227 bcs->chstate |= CHS_D_UP;
1228 gigaset_isdn_connD(bcs);
1229 cs->ops->init_bchannel(bcs);
1230 break;
1231 case ACT_FAKEHUP:
1232 at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
1233 /* fall through */
1234 case ACT_DISCONNECT:
1235 cs->cur_at_seq = SEQ_NONE;
1236 at_state->cid = -1;
1237 if (!bcs) {
1238 disconnect_nobc(p_at_state, cs);
1239 } else if (cs->onechannel && cs->dle) {
1240 /* Check for other open channels not needed:
1241 * DLE only used for M10x with one B channel.
1242 */
1243 at_state->pending_commands |= PC_DLE0;
1244 cs->commands_pending = 1;
1245 } else {
1246 disconnect_bc(at_state, cs, bcs);
1247 }
1248 break;
1249 case ACT_FAKEDLE0:
1250 at_state->int_var[VAR_ZDLE] = 0;
1251 cs->dle = 0;
1252 /* fall through */
1253 case ACT_DLE0:
1254 cs->cur_at_seq = SEQ_NONE;
1255 bcs2 = cs->bcs + cs->curchannel;
1256 disconnect_bc(&bcs2->at_state, cs, bcs2);
1257 break;
1258 case ACT_ABORTHUP:
1259 cs->cur_at_seq = SEQ_NONE;
1260 dev_warn(cs->dev, "Could not hang up.\n");
1261 at_state->cid = -1;
1262 if (!bcs)
1263 disconnect_nobc(p_at_state, cs);
1264 else if (cs->onechannel)
1265 at_state->pending_commands |= PC_DLE0;
1266 else
1267 disconnect_bc(at_state, cs, bcs);
1268 schedule_init(cs, MS_RECOVER);
1269 break;
1270 case ACT_FAILDLE0:
1271 cs->cur_at_seq = SEQ_NONE;
1272 dev_warn(cs->dev, "Error leaving DLE mode.\n");
1273 cs->dle = 0;
1274 bcs2 = cs->bcs + cs->curchannel;
1275 disconnect_bc(&bcs2->at_state, cs, bcs2);
1276 schedule_init(cs, MS_RECOVER);
1277 break;
1278 case ACT_FAILDLE1:
1279 cs->cur_at_seq = SEQ_NONE;
1280 dev_warn(cs->dev,
1281 "Could not enter DLE mode. Trying to hang up.\n");
1282 channel = cs->curchannel;
1283 cs->bcs[channel].at_state.pending_commands |= PC_HUP;
1284 cs->commands_pending = 1;
1285 break;
1286
1287 case ACT_CID: /* got cid; start dialing */
1288 cs->cur_at_seq = SEQ_NONE;
1289 channel = cs->curchannel;
1290 if (ev->parameter > 0 && ev->parameter <= 65535) {
1291 cs->bcs[channel].at_state.cid = ev->parameter;
1292 cs->bcs[channel].at_state.pending_commands |=
1293 PC_DIAL;
1294 cs->commands_pending = 1;
1295 break;
1296 }
1297 /* bad cid: fall through */
1298 case ACT_FAILCID:
1299 cs->cur_at_seq = SEQ_NONE;
1300 channel = cs->curchannel;
1301 if (reinit_and_retry(cs, channel) < 0) {
1302 dev_warn(cs->dev,
1303 "Could not get a call ID. Cannot dial.\n");
1304 bcs2 = cs->bcs + channel;
1305 disconnect_bc(&bcs2->at_state, cs, bcs2);
1306 }
1307 break;
1308 case ACT_ABORTCID:
1309 cs->cur_at_seq = SEQ_NONE;
1310 bcs2 = cs->bcs + cs->curchannel;
1311 disconnect_bc(&bcs2->at_state, cs, bcs2);
1312 break;
1313
1314 case ACT_DIALING:
1315 case ACT_ACCEPTED:
1316 cs->cur_at_seq = SEQ_NONE;
1317 break;
1318
1319 case ACT_ABORTACCEPT: /* hangup/error/timeout during ICALL procssng */
1320 if (bcs)
1321 disconnect_bc(at_state, cs, bcs);
1322 else
1323 disconnect_nobc(p_at_state, cs);
1324 break;
1325
1326 case ACT_ABORTDIAL: /* error/timeout during dial preparation */
1327 cs->cur_at_seq = SEQ_NONE;
1328 at_state->pending_commands |= PC_HUP;
1329 cs->commands_pending = 1;
1330 break;
1331
1332 case ACT_REMOTEREJECT: /* DISCONNECT_IND after dialling */
1333 case ACT_CONNTIMEOUT: /* timeout waiting for ZSAU=ACTIVE */
1334 case ACT_REMOTEHUP: /* DISCONNECT_IND with established connection */
1335 at_state->pending_commands |= PC_HUP;
1336 cs->commands_pending = 1;
1337 break;
1338 case ACT_GETSTRING: /* warning: RING, ZDLE, ...
1339 are not handled properly anymore */
1340 at_state->getstring = 1;
1341 break;
1342 case ACT_SETVER:
1343 if (!ev->ptr) {
1344 *p_genresp = 1;
1345 *p_resp_code = RSP_ERROR;
1346 break;
1347 }
1348 s = ev->ptr;
1349
1350 if (!strcmp(s, "OK")) {
1351 /* OK without version string: assume old response */
1352 *p_genresp = 1;
1353 *p_resp_code = RSP_NONE;
1354 break;
1355 }
1356
1357 for (i = 0; i < 4; ++i) {
1358 val = simple_strtoul(s, (char **) &e, 10);
1359 if (val > INT_MAX || e == s)
1360 break;
1361 if (i == 3) {
1362 if (*e)
1363 break;
1364 } else if (*e != '.')
1365 break;
1366 else
1367 s = e + 1;
1368 cs->fwver[i] = val;
1369 }
1370 if (i != 4) {
1371 *p_genresp = 1;
1372 *p_resp_code = RSP_ERROR;
1373 break;
1374 }
1375 cs->gotfwver = 0;
1376 break;
1377 case ACT_GOTVER:
1378 if (cs->gotfwver == 0) {
1379 cs->gotfwver = 1;
1380 gig_dbg(DEBUG_EVENT,
1381 "firmware version %02d.%03d.%02d.%02d",
1382 cs->fwver[0], cs->fwver[1],
1383 cs->fwver[2], cs->fwver[3]);
1384 break;
1385 }
1386 /* fall through */
1387 case ACT_FAILVER:
1388 cs->gotfwver = -1;
1389 dev_err(cs->dev, "could not read firmware version.\n");
1390 break;
1391 case ACT_ERROR:
1392 gig_dbg(DEBUG_ANY, "%s: ERROR response in ConState %d",
1393 __func__, at_state->ConState);
1394 cs->cur_at_seq = SEQ_NONE;
1395 break;
1396 case ACT_DEBUG:
1397 gig_dbg(DEBUG_ANY, "%s: resp_code %d in ConState %d",
1398 __func__, ev->type, at_state->ConState);
1399 break;
1400 case ACT_WARN:
1401 dev_warn(cs->dev, "%s: resp_code %d in ConState %d!\n",
1402 __func__, ev->type, at_state->ConState);
1403 break;
1404 case ACT_ZCAU:
1405 dev_warn(cs->dev, "cause code %04x in connection state %d.\n",
1406 ev->parameter, at_state->ConState);
1407 break;
1408
1409 /* events from the LL */
1410
1411 case ACT_DIAL:
1412 if (!ev->ptr) {
1413 *p_genresp = 1;
1414 *p_resp_code = RSP_ERROR;
1415 break;
1416 }
1417 start_dial(at_state, ev->ptr, ev->parameter);
1418 break;
1419 case ACT_ACCEPT:
1420 start_accept(at_state);
1421 break;
1422 case ACT_HUP:
1423 at_state->pending_commands |= PC_HUP;
1424 gig_dbg(DEBUG_EVENT, "Scheduling PC_HUP");
1425 cs->commands_pending = 1;
1426 break;
1427
1428 /* hotplug events */
1429
1430 case ACT_STOP:
1431 do_stop(cs);
1432 break;
1433 case ACT_START:
1434 do_start(cs);
1435 break;
1436
1437 /* events from the interface */
1438
1439 case ACT_IF_LOCK:
1440 cs->cmd_result = ev->parameter ? do_lock(cs) : do_unlock(cs);
1441 cs->waiting = 0;
1442 wake_up(&cs->waitqueue);
1443 break;
1444 case ACT_IF_VER:
1445 if (ev->parameter != 0)
1446 cs->cmd_result = -EINVAL;
1447 else if (cs->gotfwver != 1) {
1448 cs->cmd_result = -ENOENT;
1449 } else {
1450 memcpy(ev->arg, cs->fwver, sizeof cs->fwver);
1451 cs->cmd_result = 0;
1452 }
1453 cs->waiting = 0;
1454 wake_up(&cs->waitqueue);
1455 break;
1456
1457 /* events from the proc file system */
1458
1459 case ACT_PROC_CIDMODE:
1460 spin_lock_irqsave(&cs->lock, flags);
1461 if (ev->parameter != cs->cidmode) {
1462 cs->cidmode = ev->parameter;
1463 if (ev->parameter) {
1464 cs->at_state.pending_commands |= PC_CIDMODE;
1465 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1466 } else {
1467 cs->at_state.pending_commands |= PC_UMMODE;
1468 gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
1469 }
1470 cs->commands_pending = 1;
1471 }
1472 spin_unlock_irqrestore(&cs->lock, flags);
1473 cs->waiting = 0;
1474 wake_up(&cs->waitqueue);
1475 break;
1476
1477 /* events from the hardware drivers */
1478
1479 case ACT_NOTIFY_BC_DOWN:
1480 bchannel_down(bcs);
1481 break;
1482 case ACT_NOTIFY_BC_UP:
1483 bchannel_up(bcs);
1484 break;
1485 case ACT_SHUTDOWN:
1486 do_shutdown(cs);
1487 break;
1488
1489
1490 default:
1491 if (action >= ACT_CMD && action < ACT_CMD + AT_NUM) {
1492 *pp_command = at_state->bcs->commands[action - ACT_CMD];
1493 if (!*pp_command) {
1494 *p_genresp = 1;
1495 *p_resp_code = RSP_NULL;
1496 }
1497 } else
1498 dev_err(cs->dev, "%s: action==%d!\n", __func__, action);
1499 }
1500 }
1501
1502 /* State machine to do the calling and hangup procedure */
1503 static void process_event(struct cardstate *cs, struct event_t *ev)
1504 {
1505 struct bc_state *bcs;
1506 char *p_command = NULL;
1507 struct reply_t *rep;
1508 int rcode;
1509 int genresp = 0;
1510 int resp_code = RSP_ERROR;
1511 struct at_state_t *at_state;
1512 int index;
1513 int curact;
1514 unsigned long flags;
1515
1516 if (ev->cid >= 0) {
1517 at_state = at_state_from_cid(cs, ev->cid);
1518 if (!at_state) {
1519 gig_dbg(DEBUG_EVENT, "event %d for invalid cid %d",
1520 ev->type, ev->cid);
1521 gigaset_add_event(cs, &cs->at_state, RSP_WRONG_CID,
1522 NULL, 0, NULL);
1523 return;
1524 }
1525 } else {
1526 at_state = ev->at_state;
1527 if (at_state_invalid(cs, at_state)) {
1528 gig_dbg(DEBUG_EVENT, "event for invalid at_state %p",
1529 at_state);
1530 return;
1531 }
1532 }
1533
1534 gig_dbg(DEBUG_EVENT, "connection state %d, event %d",
1535 at_state->ConState, ev->type);
1536
1537 bcs = at_state->bcs;
1538
1539 /* Setting the pointer to the dial array */
1540 rep = at_state->replystruct;
1541
1542 spin_lock_irqsave(&cs->lock, flags);
1543 if (ev->type == EV_TIMEOUT) {
1544 if (ev->parameter != at_state->timer_index
1545 || !at_state->timer_active) {
1546 ev->type = RSP_NONE; /* old timeout */
1547 gig_dbg(DEBUG_EVENT, "old timeout");
1548 } else {
1549 if (at_state->waiting)
1550 gig_dbg(DEBUG_EVENT, "stopped waiting");
1551 else
1552 gig_dbg(DEBUG_EVENT, "timeout occurred");
1553 }
1554 }
1555 spin_unlock_irqrestore(&cs->lock, flags);
1556
1557 /* if the response belongs to a variable in at_state->int_var[VAR_XXXX]
1558 or at_state->str_var[STR_XXXX], set it */
1559 if (ev->type >= RSP_VAR && ev->type < RSP_VAR + VAR_NUM) {
1560 index = ev->type - RSP_VAR;
1561 at_state->int_var[index] = ev->parameter;
1562 } else if (ev->type >= RSP_STR && ev->type < RSP_STR + STR_NUM) {
1563 index = ev->type - RSP_STR;
1564 kfree(at_state->str_var[index]);
1565 at_state->str_var[index] = ev->ptr;
1566 ev->ptr = NULL; /* prevent process_events() from
1567 deallocating ptr */
1568 }
1569
1570 if (ev->type == EV_TIMEOUT || ev->type == RSP_STRING)
1571 at_state->getstring = 0;
1572
1573 /* Search row in dial array which matches modem response and current
1574 constate */
1575 for (;; rep++) {
1576 rcode = rep->resp_code;
1577 if (rcode == RSP_LAST) {
1578 /* found nothing...*/
1579 dev_warn(cs->dev, "%s: rcode=RSP_LAST: "
1580 "resp_code %d in ConState %d!\n",
1581 __func__, ev->type, at_state->ConState);
1582 return;
1583 }
1584 if ((rcode == RSP_ANY || rcode == ev->type)
1585 && ((int) at_state->ConState >= rep->min_ConState)
1586 && (rep->max_ConState < 0
1587 || (int) at_state->ConState <= rep->max_ConState)
1588 && (rep->parameter < 0 || rep->parameter == ev->parameter))
1589 break;
1590 }
1591
1592 p_command = rep->command;
1593
1594 at_state->waiting = 0;
1595 for (curact = 0; curact < MAXACT; ++curact) {
1596 /* The row tells us what we should do ..
1597 */
1598 do_action(rep->action[curact], cs, bcs, &at_state, &p_command,
1599 &genresp, &resp_code, ev);
1600 if (!at_state)
1601 /* at_state destroyed by disconnect */
1602 return;
1603 }
1604
1605 /* Jump to the next con-state regarding the array */
1606 if (rep->new_ConState >= 0)
1607 at_state->ConState = rep->new_ConState;
1608
1609 if (genresp) {
1610 spin_lock_irqsave(&cs->lock, flags);
1611 at_state->timer_expires = 0;
1612 at_state->timer_active = 0;
1613 spin_unlock_irqrestore(&cs->lock, flags);
1614 gigaset_add_event(cs, at_state, resp_code, NULL, 0, NULL);
1615 } else {
1616 /* Send command to modem if not NULL... */
1617 if (p_command) {
1618 if (cs->connected)
1619 send_command(cs, p_command, at_state);
1620 else
1621 gigaset_add_event(cs, at_state, RSP_NODEV,
1622 NULL, 0, NULL);
1623 }
1624
1625 spin_lock_irqsave(&cs->lock, flags);
1626 if (!rep->timeout) {
1627 at_state->timer_expires = 0;
1628 at_state->timer_active = 0;
1629 } else if (rep->timeout > 0) { /* new timeout */
1630 at_state->timer_expires = rep->timeout * 10;
1631 at_state->timer_active = 1;
1632 ++at_state->timer_index;
1633 }
1634 spin_unlock_irqrestore(&cs->lock, flags);
1635 }
1636 }
1637
1638 static void schedule_sequence(struct cardstate *cs,
1639 struct at_state_t *at_state, int sequence)
1640 {
1641 cs->cur_at_seq = sequence;
1642 gigaset_add_event(cs, at_state, RSP_INIT, NULL, sequence, NULL);
1643 }
1644
1645 static void process_command_flags(struct cardstate *cs)
1646 {
1647 struct at_state_t *at_state = NULL;
1648 struct bc_state *bcs;
1649 int i;
1650 int sequence;
1651 unsigned long flags;
1652
1653 cs->commands_pending = 0;
1654
1655 if (cs->cur_at_seq) {
1656 gig_dbg(DEBUG_EVENT, "not searching scheduled commands: busy");
1657 return;
1658 }
1659
1660 gig_dbg(DEBUG_EVENT, "searching scheduled commands");
1661
1662 sequence = SEQ_NONE;
1663
1664 /* clear pending_commands and hangup channels on shutdown */
1665 if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1666 cs->at_state.pending_commands &= ~PC_CIDMODE;
1667 for (i = 0; i < cs->channels; ++i) {
1668 bcs = cs->bcs + i;
1669 at_state = &bcs->at_state;
1670 at_state->pending_commands &=
1671 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1672 if (at_state->cid > 0)
1673 at_state->pending_commands |= PC_HUP;
1674 if (at_state->pending_commands & PC_CID) {
1675 at_state->pending_commands |= PC_NOCID;
1676 at_state->pending_commands &= ~PC_CID;
1677 }
1678 }
1679 }
1680
1681 /* clear pending_commands and hangup channels on reset */
1682 if (cs->at_state.pending_commands & PC_INIT) {
1683 cs->at_state.pending_commands &= ~PC_CIDMODE;
1684 for (i = 0; i < cs->channels; ++i) {
1685 bcs = cs->bcs + i;
1686 at_state = &bcs->at_state;
1687 at_state->pending_commands &=
1688 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1689 if (at_state->cid > 0)
1690 at_state->pending_commands |= PC_HUP;
1691 if (cs->mstate == MS_RECOVER) {
1692 if (at_state->pending_commands & PC_CID) {
1693 at_state->pending_commands |= PC_NOCID;
1694 at_state->pending_commands &= ~PC_CID;
1695 }
1696 }
1697 }
1698 }
1699
1700 /* only switch back to unimodem mode if no commands are pending and
1701 * no channels are up */
1702 spin_lock_irqsave(&cs->lock, flags);
1703 if (cs->at_state.pending_commands == PC_UMMODE
1704 && !cs->cidmode
1705 && list_empty(&cs->temp_at_states)
1706 && cs->mode == M_CID) {
1707 sequence = SEQ_UMMODE;
1708 at_state = &cs->at_state;
1709 for (i = 0; i < cs->channels; ++i) {
1710 bcs = cs->bcs + i;
1711 if (bcs->at_state.pending_commands ||
1712 bcs->at_state.cid > 0) {
1713 sequence = SEQ_NONE;
1714 break;
1715 }
1716 }
1717 }
1718 spin_unlock_irqrestore(&cs->lock, flags);
1719 cs->at_state.pending_commands &= ~PC_UMMODE;
1720 if (sequence != SEQ_NONE) {
1721 schedule_sequence(cs, at_state, sequence);
1722 return;
1723 }
1724
1725 for (i = 0; i < cs->channels; ++i) {
1726 bcs = cs->bcs + i;
1727 if (bcs->at_state.pending_commands & PC_HUP) {
1728 if (cs->dle) {
1729 cs->curchannel = bcs->channel;
1730 schedule_sequence(cs, &cs->at_state, SEQ_DLE0);
1731 return;
1732 }
1733 bcs->at_state.pending_commands &= ~PC_HUP;
1734 if (bcs->at_state.pending_commands & PC_CID) {
1735 /* not yet dialing: PC_NOCID is sufficient */
1736 bcs->at_state.pending_commands |= PC_NOCID;
1737 bcs->at_state.pending_commands &= ~PC_CID;
1738 } else {
1739 schedule_sequence(cs, &bcs->at_state, SEQ_HUP);
1740 return;
1741 }
1742 }
1743 if (bcs->at_state.pending_commands & PC_NOCID) {
1744 bcs->at_state.pending_commands &= ~PC_NOCID;
1745 cs->curchannel = bcs->channel;
1746 schedule_sequence(cs, &cs->at_state, SEQ_NOCID);
1747 return;
1748 } else if (bcs->at_state.pending_commands & PC_DLE0) {
1749 bcs->at_state.pending_commands &= ~PC_DLE0;
1750 cs->curchannel = bcs->channel;
1751 schedule_sequence(cs, &cs->at_state, SEQ_DLE0);
1752 return;
1753 }
1754 }
1755
1756 list_for_each_entry(at_state, &cs->temp_at_states, list)
1757 if (at_state->pending_commands & PC_HUP) {
1758 at_state->pending_commands &= ~PC_HUP;
1759 schedule_sequence(cs, at_state, SEQ_HUP);
1760 return;
1761 }
1762
1763 if (cs->at_state.pending_commands & PC_INIT) {
1764 cs->at_state.pending_commands &= ~PC_INIT;
1765 cs->dle = 0;
1766 cs->inbuf->inputstate = INS_command;
1767 schedule_sequence(cs, &cs->at_state, SEQ_INIT);
1768 return;
1769 }
1770 if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1771 cs->at_state.pending_commands &= ~PC_SHUTDOWN;
1772 schedule_sequence(cs, &cs->at_state, SEQ_SHUTDOWN);
1773 return;
1774 }
1775 if (cs->at_state.pending_commands & PC_CIDMODE) {
1776 cs->at_state.pending_commands &= ~PC_CIDMODE;
1777 if (cs->mode == M_UNIMODEM) {
1778 cs->retry_count = 1;
1779 schedule_sequence(cs, &cs->at_state, SEQ_CIDMODE);
1780 return;
1781 }
1782 }
1783
1784 for (i = 0; i < cs->channels; ++i) {
1785 bcs = cs->bcs + i;
1786 if (bcs->at_state.pending_commands & PC_DLE1) {
1787 bcs->at_state.pending_commands &= ~PC_DLE1;
1788 cs->curchannel = bcs->channel;
1789 schedule_sequence(cs, &cs->at_state, SEQ_DLE1);
1790 return;
1791 }
1792 if (bcs->at_state.pending_commands & PC_ACCEPT) {
1793 bcs->at_state.pending_commands &= ~PC_ACCEPT;
1794 schedule_sequence(cs, &bcs->at_state, SEQ_ACCEPT);
1795 return;
1796 }
1797 if (bcs->at_state.pending_commands & PC_DIAL) {
1798 bcs->at_state.pending_commands &= ~PC_DIAL;
1799 schedule_sequence(cs, &bcs->at_state, SEQ_DIAL);
1800 return;
1801 }
1802 if (bcs->at_state.pending_commands & PC_CID) {
1803 switch (cs->mode) {
1804 case M_UNIMODEM:
1805 cs->at_state.pending_commands |= PC_CIDMODE;
1806 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1807 cs->commands_pending = 1;
1808 return;
1809 case M_UNKNOWN:
1810 schedule_init(cs, MS_INIT);
1811 return;
1812 }
1813 bcs->at_state.pending_commands &= ~PC_CID;
1814 cs->curchannel = bcs->channel;
1815 cs->retry_count = 2;
1816 schedule_sequence(cs, &cs->at_state, SEQ_CID);
1817 return;
1818 }
1819 }
1820 }
1821
1822 static void process_events(struct cardstate *cs)
1823 {
1824 struct event_t *ev;
1825 unsigned head, tail;
1826 int i;
1827 int check_flags = 0;
1828 int was_busy;
1829 unsigned long flags;
1830
1831 spin_lock_irqsave(&cs->ev_lock, flags);
1832 head = cs->ev_head;
1833
1834 for (i = 0; i < 2 * MAX_EVENTS; ++i) {
1835 tail = cs->ev_tail;
1836 if (tail == head) {
1837 if (!check_flags && !cs->commands_pending)
1838 break;
1839 check_flags = 0;
1840 spin_unlock_irqrestore(&cs->ev_lock, flags);
1841 process_command_flags(cs);
1842 spin_lock_irqsave(&cs->ev_lock, flags);
1843 tail = cs->ev_tail;
1844 if (tail == head) {
1845 if (!cs->commands_pending)
1846 break;
1847 continue;
1848 }
1849 }
1850
1851 ev = cs->events + head;
1852 was_busy = cs->cur_at_seq != SEQ_NONE;
1853 spin_unlock_irqrestore(&cs->ev_lock, flags);
1854 process_event(cs, ev);
1855 spin_lock_irqsave(&cs->ev_lock, flags);
1856 kfree(ev->ptr);
1857 ev->ptr = NULL;
1858 if (was_busy && cs->cur_at_seq == SEQ_NONE)
1859 check_flags = 1;
1860
1861 head = (head + 1) % MAX_EVENTS;
1862 cs->ev_head = head;
1863 }
1864
1865 spin_unlock_irqrestore(&cs->ev_lock, flags);
1866
1867 if (i == 2 * MAX_EVENTS) {
1868 dev_err(cs->dev,
1869 "infinite loop in process_events; aborting.\n");
1870 }
1871 }
1872
1873 /* tasklet scheduled on any event received from the Gigaset device
1874 * parameter:
1875 * data ISDN controller state structure
1876 */
1877 void gigaset_handle_event(unsigned long data)
1878 {
1879 struct cardstate *cs = (struct cardstate *) data;
1880
1881 /* handle incoming data on control/common channel */
1882 if (cs->inbuf->head != cs->inbuf->tail) {
1883 gig_dbg(DEBUG_INTR, "processing new data");
1884 cs->ops->handle_input(cs->inbuf);
1885 }
1886
1887 process_events(cs);
1888 }
Linux kernel - Deliverables
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