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 unsigned char *response;
355 int resp_code;
356 int type;
357 } resp_type[] =
358 {
359 {"OK", RSP_OK, RT_NOTHING},
360 {"ERROR", RSP_ERROR, RT_NOTHING},
361 {"ZSAU", RSP_ZSAU, RT_ZSAU},
362 {"ZCAU", RSP_ZCAU, RT_ZCAU},
363 {"RING", RSP_RING, RT_RING},
364 {"ZGCI", RSP_ZGCI, RT_NUMBER},
365 {"ZVLS", RSP_ZVLS, RT_NUMBER},
366 {"ZCTP", RSP_ZCTP, RT_NUMBER},
367 {"ZDLE", RSP_ZDLE, RT_NUMBER},
368 {"ZHLC", RSP_ZHLC, RT_STRING},
369 {"ZBC", RSP_ZBC, RT_STRING},
370 {"NMBR", RSP_NMBR, RT_STRING},
371 {"ZCPN", RSP_ZCPN, RT_STRING},
372 {"ZCON", RSP_ZCON, RT_STRING},
373 {NULL, 0, 0}
374 };
375
376 static const struct zsau_resp_t {
377 unsigned char *str;
378 int code;
379 } zsau_resp[] =
380 {
381 {"OUTGOING_CALL_PROCEEDING", ZSAU_OUTGOING_CALL_PROCEEDING},
382 {"CALL_DELIVERED", ZSAU_CALL_DELIVERED},
383 {"ACTIVE", ZSAU_ACTIVE},
384 {"DISCONNECT_IND", ZSAU_DISCONNECT_IND},
385 {"NULL", ZSAU_NULL},
386 {"DISCONNECT_REQ", ZSAU_DISCONNECT_REQ},
387 {NULL, ZSAU_UNKNOWN}
388 };
389
390 /* retrieve CID from parsed response
391 * returns 0 if no CID, -1 if invalid CID, or CID value 1..65535
392 */
cid_of_response(char * s)393 static int cid_of_response(char *s)
394 {
395 int cid;
396 int rc;
397
398 if (s[-1] != ';')
399 return 0; /* no CID separator */
400 rc = kstrtoint(s, 10, &cid);
401 if (rc)
402 return 0; /* CID not numeric */
403 if (cid < 1 || cid > 65535)
404 return -1; /* CID out of range */
405 return cid;
406 }
407
408 /**
409 * gigaset_handle_modem_response() - process received modem response
410 * @cs: device descriptor structure.
411 *
412 * Called by asyncdata/isocdata if a block of data received from the
413 * device must be processed as a modem command response. The data is
414 * already in the cs structure.
415 */
gigaset_handle_modem_response(struct cardstate * cs)416 void gigaset_handle_modem_response(struct cardstate *cs)
417 {
418 unsigned char *argv[MAX_REC_PARAMS + 1];
419 int params;
420 int i, j;
421 const struct resp_type_t *rt;
422 const struct zsau_resp_t *zr;
423 int curarg;
424 unsigned long flags;
425 unsigned next, tail, head;
426 struct event_t *event;
427 int resp_code;
428 int param_type;
429 int abort;
430 size_t len;
431 int cid;
432 int rawstring;
433
434 len = cs->cbytes;
435 if (!len) {
436 /* ignore additional LFs/CRs (M10x config mode or cx100) */
437 gig_dbg(DEBUG_MCMD, "skipped EOL [%02X]", cs->respdata[len]);
438 return;
439 }
440 cs->respdata[len] = 0;
441 argv[0] = cs->respdata;
442 params = 1;
443 if (cs->at_state.getstring) {
444 /* getstring only allowed without cid at the moment */
445 cs->at_state.getstring = 0;
446 rawstring = 1;
447 cid = 0;
448 } else {
449 /* parse line */
450 for (i = 0; i < len; i++)
451 switch (cs->respdata[i]) {
452 case ';':
453 case ',':
454 case '=':
455 if (params > MAX_REC_PARAMS) {
456 dev_warn(cs->dev,
457 "too many parameters in response\n");
458 /* need last parameter (might be CID) */
459 params--;
460 }
461 argv[params++] = cs->respdata + i + 1;
462 }
463
464 rawstring = 0;
465 cid = params > 1 ? cid_of_response(argv[params - 1]) : 0;
466 if (cid < 0) {
467 gigaset_add_event(cs, &cs->at_state, RSP_INVAL,
468 NULL, 0, NULL);
469 return;
470 }
471
472 for (j = 1; j < params; ++j)
473 argv[j][-1] = 0;
474
475 gig_dbg(DEBUG_EVENT, "CMD received: %s", argv[0]);
476 if (cid) {
477 --params;
478 gig_dbg(DEBUG_EVENT, "CID: %s", argv[params]);
479 }
480 gig_dbg(DEBUG_EVENT, "available params: %d", params - 1);
481 for (j = 1; j < params; j++)
482 gig_dbg(DEBUG_EVENT, "param %d: %s", j, argv[j]);
483 }
484
485 spin_lock_irqsave(&cs->ev_lock, flags);
486 head = cs->ev_head;
487 tail = cs->ev_tail;
488
489 abort = 1;
490 curarg = 0;
491 while (curarg < params) {
492 next = (tail + 1) % MAX_EVENTS;
493 if (unlikely(next == head)) {
494 dev_err(cs->dev, "event queue full\n");
495 break;
496 }
497
498 event = cs->events + tail;
499 event->at_state = NULL;
500 event->cid = cid;
501 event->ptr = NULL;
502 event->arg = NULL;
503 tail = next;
504
505 if (rawstring) {
506 resp_code = RSP_STRING;
507 param_type = RT_STRING;
508 } else {
509 for (rt = resp_type; rt->response; ++rt)
510 if (!strcmp(argv[curarg], rt->response))
511 break;
512
513 if (!rt->response) {
514 event->type = RSP_NONE;
515 gig_dbg(DEBUG_EVENT,
516 "unknown modem response: '%s'\n",
517 argv[curarg]);
518 break;
519 }
520
521 resp_code = rt->resp_code;
522 param_type = rt->type;
523 ++curarg;
524 }
525
526 event->type = resp_code;
527
528 switch (param_type) {
529 case RT_NOTHING:
530 break;
531 case RT_RING:
532 if (!cid) {
533 dev_err(cs->dev,
534 "received RING without CID!\n");
535 event->type = RSP_INVAL;
536 abort = 1;
537 } else {
538 event->cid = 0;
539 event->parameter = cid;
540 abort = 0;
541 }
542 break;
543 case RT_ZSAU:
544 if (curarg >= params) {
545 event->parameter = ZSAU_NONE;
546 break;
547 }
548 for (zr = zsau_resp; zr->str; ++zr)
549 if (!strcmp(argv[curarg], zr->str))
550 break;
551 event->parameter = zr->code;
552 if (!zr->str)
553 dev_warn(cs->dev,
554 "%s: unknown parameter %s after ZSAU\n",
555 __func__, argv[curarg]);
556 ++curarg;
557 break;
558 case RT_STRING:
559 if (curarg < params) {
560 event->ptr = kstrdup(argv[curarg], GFP_ATOMIC);
561 if (!event->ptr)
562 dev_err(cs->dev, "out of memory\n");
563 ++curarg;
564 }
565 gig_dbg(DEBUG_EVENT, "string==%s",
566 event->ptr ? (char *) event->ptr : "NULL");
567 break;
568 case RT_ZCAU:
569 event->parameter = -1;
570 if (curarg + 1 < params) {
571 u8 type, value;
572
573 i = kstrtou8(argv[curarg++], 16, &type);
574 j = kstrtou8(argv[curarg++], 16, &value);
575 if (i == 0 && j == 0)
576 event->parameter = (type << 8) | value;
577 } else
578 curarg = params - 1;
579 break;
580 case RT_NUMBER:
581 if (curarg >= params ||
582 kstrtoint(argv[curarg++], 10, &event->parameter))
583 event->parameter = -1;
584 gig_dbg(DEBUG_EVENT, "parameter==%d", event->parameter);
585 break;
586 }
587
588 if (resp_code == RSP_ZDLE)
589 cs->dle = event->parameter;
590
591 if (abort)
592 break;
593 }
594
595 cs->ev_tail = tail;
596 spin_unlock_irqrestore(&cs->ev_lock, flags);
597
598 if (curarg != params)
599 gig_dbg(DEBUG_EVENT,
600 "invalid number of processed parameters: %d/%d",
601 curarg, params);
602 }
603 EXPORT_SYMBOL_GPL(gigaset_handle_modem_response);
604
605 /* disconnect
606 * process closing of connection associated with given AT state structure
607 */
disconnect(struct at_state_t ** at_state_p)608 static void disconnect(struct at_state_t **at_state_p)
609 {
610 unsigned long flags;
611 struct bc_state *bcs = (*at_state_p)->bcs;
612 struct cardstate *cs = (*at_state_p)->cs;
613
614 spin_lock_irqsave(&cs->lock, flags);
615 ++(*at_state_p)->seq_index;
616
617 /* revert to selected idle mode */
618 if (!cs->cidmode) {
619 cs->at_state.pending_commands |= PC_UMMODE;
620 gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
621 cs->commands_pending = 1;
622 }
623 spin_unlock_irqrestore(&cs->lock, flags);
624
625 if (bcs) {
626 /* B channel assigned: invoke hardware specific handler */
627 cs->ops->close_bchannel(bcs);
628 /* notify LL */
629 if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
630 bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
631 gigaset_isdn_hupD(bcs);
632 }
633 } else {
634 /* no B channel assigned: just deallocate */
635 spin_lock_irqsave(&cs->lock, flags);
636 list_del(&(*at_state_p)->list);
637 kfree(*at_state_p);
638 *at_state_p = NULL;
639 spin_unlock_irqrestore(&cs->lock, flags);
640 }
641 }
642
643 /* get_free_channel
644 * get a free AT state structure: either one of those associated with the
645 * B channels of the Gigaset device, or if none of those is available,
646 * a newly allocated one with bcs=NULL
647 * The structure should be freed by calling disconnect() after use.
648 */
get_free_channel(struct cardstate * cs,int cid)649 static inline struct at_state_t *get_free_channel(struct cardstate *cs,
650 int cid)
651 /* cids: >0: siemens-cid
652 0: without cid
653 -1: no cid assigned yet
654 */
655 {
656 unsigned long flags;
657 int i;
658 struct at_state_t *ret;
659
660 for (i = 0; i < cs->channels; ++i)
661 if (gigaset_get_channel(cs->bcs + i)) {
662 ret = &cs->bcs[i].at_state;
663 ret->cid = cid;
664 return ret;
665 }
666
667 spin_lock_irqsave(&cs->lock, flags);
668 ret = kmalloc(sizeof(struct at_state_t), GFP_ATOMIC);
669 if (ret) {
670 gigaset_at_init(ret, NULL, cs, cid);
671 list_add(&ret->list, &cs->temp_at_states);
672 }
673 spin_unlock_irqrestore(&cs->lock, flags);
674 return ret;
675 }
676
init_failed(struct cardstate * cs,int mode)677 static void init_failed(struct cardstate *cs, int mode)
678 {
679 int i;
680 struct at_state_t *at_state;
681
682 cs->at_state.pending_commands &= ~PC_INIT;
683 cs->mode = mode;
684 cs->mstate = MS_UNINITIALIZED;
685 gigaset_free_channels(cs);
686 for (i = 0; i < cs->channels; ++i) {
687 at_state = &cs->bcs[i].at_state;
688 if (at_state->pending_commands & PC_CID) {
689 at_state->pending_commands &= ~PC_CID;
690 at_state->pending_commands |= PC_NOCID;
691 cs->commands_pending = 1;
692 }
693 }
694 }
695
schedule_init(struct cardstate * cs,int state)696 static void schedule_init(struct cardstate *cs, int state)
697 {
698 if (cs->at_state.pending_commands & PC_INIT) {
699 gig_dbg(DEBUG_EVENT, "not scheduling PC_INIT again");
700 return;
701 }
702 cs->mstate = state;
703 cs->mode = M_UNKNOWN;
704 gigaset_block_channels(cs);
705 cs->at_state.pending_commands |= PC_INIT;
706 gig_dbg(DEBUG_EVENT, "Scheduling PC_INIT");
707 cs->commands_pending = 1;
708 }
709
710 /* Add "AT" to a command, add the cid, dle encode it, send the result to the
711 hardware. */
send_command(struct cardstate * cs,const char * cmd,int cid,int dle,gfp_t kmallocflags)712 static void send_command(struct cardstate *cs, const char *cmd, int cid,
713 int dle, gfp_t kmallocflags)
714 {
715 struct cmdbuf_t *cb;
716 size_t buflen;
717
718 buflen = strlen(cmd) + 12; /* DLE ( A T 1 2 3 4 5 <cmd> DLE ) \0 */
719 cb = kmalloc(sizeof(struct cmdbuf_t) + buflen, kmallocflags);
720 if (!cb) {
721 dev_err(cs->dev, "%s: out of memory\n", __func__);
722 return;
723 }
724 if (cid > 0 && cid <= 65535)
725 cb->len = snprintf(cb->buf, buflen,
726 dle ? "\020(AT%d%s\020)" : "AT%d%s",
727 cid, cmd);
728 else
729 cb->len = snprintf(cb->buf, buflen,
730 dle ? "\020(AT%s\020)" : "AT%s",
731 cmd);
732 cb->offset = 0;
733 cb->next = NULL;
734 cb->wake_tasklet = NULL;
735 cs->ops->write_cmd(cs, cb);
736 }
737
at_state_from_cid(struct cardstate * cs,int cid)738 static struct at_state_t *at_state_from_cid(struct cardstate *cs, int cid)
739 {
740 struct at_state_t *at_state;
741 int i;
742 unsigned long flags;
743
744 if (cid == 0)
745 return &cs->at_state;
746
747 for (i = 0; i < cs->channels; ++i)
748 if (cid == cs->bcs[i].at_state.cid)
749 return &cs->bcs[i].at_state;
750
751 spin_lock_irqsave(&cs->lock, flags);
752
753 list_for_each_entry(at_state, &cs->temp_at_states, list)
754 if (cid == at_state->cid) {
755 spin_unlock_irqrestore(&cs->lock, flags);
756 return at_state;
757 }
758
759 spin_unlock_irqrestore(&cs->lock, flags);
760
761 return NULL;
762 }
763
bchannel_down(struct bc_state * bcs)764 static void bchannel_down(struct bc_state *bcs)
765 {
766 if (bcs->chstate & CHS_B_UP) {
767 bcs->chstate &= ~CHS_B_UP;
768 gigaset_isdn_hupB(bcs);
769 }
770
771 if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
772 bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
773 gigaset_isdn_hupD(bcs);
774 }
775
776 gigaset_free_channel(bcs);
777
778 gigaset_bcs_reinit(bcs);
779 }
780
bchannel_up(struct bc_state * bcs)781 static void bchannel_up(struct bc_state *bcs)
782 {
783 if (bcs->chstate & CHS_B_UP) {
784 dev_notice(bcs->cs->dev, "%s: B channel already up\n",
785 __func__);
786 return;
787 }
788
789 bcs->chstate |= CHS_B_UP;
790 gigaset_isdn_connB(bcs);
791 }
792
start_dial(struct at_state_t * at_state,void * data,unsigned seq_index)793 static void start_dial(struct at_state_t *at_state, void *data,
794 unsigned seq_index)
795 {
796 struct bc_state *bcs = at_state->bcs;
797 struct cardstate *cs = at_state->cs;
798 char **commands = data;
799 unsigned long flags;
800 int i;
801
802 bcs->chstate |= CHS_NOTIFY_LL;
803
804 spin_lock_irqsave(&cs->lock, flags);
805 if (at_state->seq_index != seq_index) {
806 spin_unlock_irqrestore(&cs->lock, flags);
807 goto error;
808 }
809 spin_unlock_irqrestore(&cs->lock, flags);
810
811 for (i = 0; i < AT_NUM; ++i) {
812 kfree(bcs->commands[i]);
813 bcs->commands[i] = commands[i];
814 }
815
816 at_state->pending_commands |= PC_CID;
817 gig_dbg(DEBUG_EVENT, "Scheduling PC_CID");
818 cs->commands_pending = 1;
819 return;
820
821 error:
822 for (i = 0; i < AT_NUM; ++i) {
823 kfree(commands[i]);
824 commands[i] = NULL;
825 }
826 at_state->pending_commands |= PC_NOCID;
827 gig_dbg(DEBUG_EVENT, "Scheduling PC_NOCID");
828 cs->commands_pending = 1;
829 return;
830 }
831
start_accept(struct at_state_t * at_state)832 static void start_accept(struct at_state_t *at_state)
833 {
834 struct cardstate *cs = at_state->cs;
835 struct bc_state *bcs = at_state->bcs;
836 int i;
837
838 for (i = 0; i < AT_NUM; ++i) {
839 kfree(bcs->commands[i]);
840 bcs->commands[i] = NULL;
841 }
842
843 bcs->commands[AT_PROTO] = kmalloc(9, GFP_ATOMIC);
844 bcs->commands[AT_ISO] = kmalloc(9, GFP_ATOMIC);
845 if (!bcs->commands[AT_PROTO] || !bcs->commands[AT_ISO]) {
846 dev_err(at_state->cs->dev, "out of memory\n");
847 /* error reset */
848 at_state->pending_commands |= PC_HUP;
849 gig_dbg(DEBUG_EVENT, "Scheduling PC_HUP");
850 cs->commands_pending = 1;
851 return;
852 }
853
854 snprintf(bcs->commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
855 snprintf(bcs->commands[AT_ISO], 9, "^SISO=%u\r", bcs->channel + 1);
856
857 at_state->pending_commands |= PC_ACCEPT;
858 gig_dbg(DEBUG_EVENT, "Scheduling PC_ACCEPT");
859 cs->commands_pending = 1;
860 }
861
do_start(struct cardstate * cs)862 static void do_start(struct cardstate *cs)
863 {
864 gigaset_free_channels(cs);
865
866 if (cs->mstate != MS_LOCKED)
867 schedule_init(cs, MS_INIT);
868
869 cs->isdn_up = 1;
870 gigaset_isdn_start(cs);
871
872 cs->waiting = 0;
873 wake_up(&cs->waitqueue);
874 }
875
finish_shutdown(struct cardstate * cs)876 static void finish_shutdown(struct cardstate *cs)
877 {
878 if (cs->mstate != MS_LOCKED) {
879 cs->mstate = MS_UNINITIALIZED;
880 cs->mode = M_UNKNOWN;
881 }
882
883 /* Tell the LL that the device is not available .. */
884 if (cs->isdn_up) {
885 cs->isdn_up = 0;
886 gigaset_isdn_stop(cs);
887 }
888
889 /* The rest is done by cleanup_cs () in user mode. */
890
891 cs->cmd_result = -ENODEV;
892 cs->waiting = 0;
893 wake_up(&cs->waitqueue);
894 }
895
do_shutdown(struct cardstate * cs)896 static void do_shutdown(struct cardstate *cs)
897 {
898 gigaset_block_channels(cs);
899
900 if (cs->mstate == MS_READY) {
901 cs->mstate = MS_SHUTDOWN;
902 cs->at_state.pending_commands |= PC_SHUTDOWN;
903 gig_dbg(DEBUG_EVENT, "Scheduling PC_SHUTDOWN");
904 cs->commands_pending = 1;
905 } else
906 finish_shutdown(cs);
907 }
908
do_stop(struct cardstate * cs)909 static void do_stop(struct cardstate *cs)
910 {
911 unsigned long flags;
912
913 spin_lock_irqsave(&cs->lock, flags);
914 cs->connected = 0;
915 spin_unlock_irqrestore(&cs->lock, flags);
916
917 do_shutdown(cs);
918 }
919
920 /* Entering cid mode or getting a cid failed:
921 * try to initialize the device and try again.
922 *
923 * channel >= 0: getting cid for the channel failed
924 * channel < 0: entering cid mode failed
925 *
926 * returns 0 on failure
927 */
reinit_and_retry(struct cardstate * cs,int channel)928 static int reinit_and_retry(struct cardstate *cs, int channel)
929 {
930 int i;
931
932 if (--cs->retry_count <= 0)
933 return 0;
934
935 for (i = 0; i < cs->channels; ++i)
936 if (cs->bcs[i].at_state.cid > 0)
937 return 0;
938
939 if (channel < 0)
940 dev_warn(cs->dev,
941 "Could not enter cid mode. Reinit device and try again.\n");
942 else {
943 dev_warn(cs->dev,
944 "Could not get a call id. Reinit device and try again.\n");
945 cs->bcs[channel].at_state.pending_commands |= PC_CID;
946 }
947 schedule_init(cs, MS_INIT);
948 return 1;
949 }
950
at_state_invalid(struct cardstate * cs,struct at_state_t * test_ptr)951 static int at_state_invalid(struct cardstate *cs,
952 struct at_state_t *test_ptr)
953 {
954 unsigned long flags;
955 unsigned channel;
956 struct at_state_t *at_state;
957 int retval = 0;
958
959 spin_lock_irqsave(&cs->lock, flags);
960
961 if (test_ptr == &cs->at_state)
962 goto exit;
963
964 list_for_each_entry(at_state, &cs->temp_at_states, list)
965 if (at_state == test_ptr)
966 goto exit;
967
968 for (channel = 0; channel < cs->channels; ++channel)
969 if (&cs->bcs[channel].at_state == test_ptr)
970 goto exit;
971
972 retval = 1;
973 exit:
974 spin_unlock_irqrestore(&cs->lock, flags);
975 return retval;
976 }
977
handle_icall(struct cardstate * cs,struct bc_state * bcs,struct at_state_t ** p_at_state)978 static void handle_icall(struct cardstate *cs, struct bc_state *bcs,
979 struct at_state_t **p_at_state)
980 {
981 int retval;
982 struct at_state_t *at_state = *p_at_state;
983
984 retval = gigaset_isdn_icall(at_state);
985 switch (retval) {
986 case ICALL_ACCEPT:
987 break;
988 default:
989 dev_err(cs->dev, "internal error: disposition=%d\n", retval);
990 /* --v-- fall through --v-- */
991 case ICALL_IGNORE:
992 case ICALL_REJECT:
993 /* hang up actively
994 * Device doc says that would reject the call.
995 * In fact it doesn't.
996 */
997 at_state->pending_commands |= PC_HUP;
998 cs->commands_pending = 1;
999 break;
1000 }
1001 }
1002
do_lock(struct cardstate * cs)1003 static int do_lock(struct cardstate *cs)
1004 {
1005 int mode;
1006 int i;
1007
1008 switch (cs->mstate) {
1009 case MS_UNINITIALIZED:
1010 case MS_READY:
1011 if (cs->cur_at_seq || !list_empty(&cs->temp_at_states) ||
1012 cs->at_state.pending_commands)
1013 return -EBUSY;
1014
1015 for (i = 0; i < cs->channels; ++i)
1016 if (cs->bcs[i].at_state.pending_commands)
1017 return -EBUSY;
1018
1019 if (!gigaset_get_channels(cs))
1020 return -EBUSY;
1021
1022 break;
1023 case MS_LOCKED:
1024 break;
1025 default:
1026 return -EBUSY;
1027 }
1028
1029 mode = cs->mode;
1030 cs->mstate = MS_LOCKED;
1031 cs->mode = M_UNKNOWN;
1032
1033 return mode;
1034 }
1035
do_unlock(struct cardstate * cs)1036 static int do_unlock(struct cardstate *cs)
1037 {
1038 if (cs->mstate != MS_LOCKED)
1039 return -EINVAL;
1040
1041 cs->mstate = MS_UNINITIALIZED;
1042 cs->mode = M_UNKNOWN;
1043 gigaset_free_channels(cs);
1044 if (cs->connected)
1045 schedule_init(cs, MS_INIT);
1046
1047 return 0;
1048 }
1049
do_action(int action,struct cardstate * cs,struct bc_state * bcs,struct at_state_t ** p_at_state,char ** pp_command,int * p_genresp,int * p_resp_code,struct event_t * ev)1050 static void do_action(int action, struct cardstate *cs,
1051 struct bc_state *bcs,
1052 struct at_state_t **p_at_state, char **pp_command,
1053 int *p_genresp, int *p_resp_code,
1054 struct event_t *ev)
1055 {
1056 struct at_state_t *at_state = *p_at_state;
1057 struct at_state_t *at_state2;
1058 unsigned long flags;
1059
1060 int channel;
1061
1062 unsigned char *s, *e;
1063 int i;
1064 unsigned long val;
1065
1066 switch (action) {
1067 case ACT_NOTHING:
1068 break;
1069 case ACT_TIMEOUT:
1070 at_state->waiting = 1;
1071 break;
1072 case ACT_INIT:
1073 cs->at_state.pending_commands &= ~PC_INIT;
1074 cs->cur_at_seq = SEQ_NONE;
1075 cs->mode = M_UNIMODEM;
1076 spin_lock_irqsave(&cs->lock, flags);
1077 if (!cs->cidmode) {
1078 spin_unlock_irqrestore(&cs->lock, flags);
1079 gigaset_free_channels(cs);
1080 cs->mstate = MS_READY;
1081 break;
1082 }
1083 spin_unlock_irqrestore(&cs->lock, flags);
1084 cs->at_state.pending_commands |= PC_CIDMODE;
1085 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1086 cs->commands_pending = 1;
1087 break;
1088 case ACT_FAILINIT:
1089 dev_warn(cs->dev, "Could not initialize the device.\n");
1090 cs->dle = 0;
1091 init_failed(cs, M_UNKNOWN);
1092 cs->cur_at_seq = SEQ_NONE;
1093 break;
1094 case ACT_CONFIGMODE:
1095 init_failed(cs, M_CONFIG);
1096 cs->cur_at_seq = SEQ_NONE;
1097 break;
1098 case ACT_SETDLE1:
1099 cs->dle = 1;
1100 /* cs->inbuf[0].inputstate |= INS_command | INS_DLE_command; */
1101 cs->inbuf[0].inputstate &=
1102 ~(INS_command | INS_DLE_command);
1103 break;
1104 case ACT_SETDLE0:
1105 cs->dle = 0;
1106 cs->inbuf[0].inputstate =
1107 (cs->inbuf[0].inputstate & ~INS_DLE_command)
1108 | INS_command;
1109 break;
1110 case ACT_CMODESET:
1111 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1112 gigaset_free_channels(cs);
1113 cs->mstate = MS_READY;
1114 }
1115 cs->mode = M_CID;
1116 cs->cur_at_seq = SEQ_NONE;
1117 break;
1118 case ACT_UMODESET:
1119 cs->mode = M_UNIMODEM;
1120 cs->cur_at_seq = SEQ_NONE;
1121 break;
1122 case ACT_FAILCMODE:
1123 cs->cur_at_seq = SEQ_NONE;
1124 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1125 init_failed(cs, M_UNKNOWN);
1126 break;
1127 }
1128 if (!reinit_and_retry(cs, -1))
1129 schedule_init(cs, MS_RECOVER);
1130 break;
1131 case ACT_FAILUMODE:
1132 cs->cur_at_seq = SEQ_NONE;
1133 schedule_init(cs, MS_RECOVER);
1134 break;
1135 case ACT_HUPMODEM:
1136 /* send "+++" (hangup in unimodem mode) */
1137 if (cs->connected) {
1138 struct cmdbuf_t *cb;
1139
1140 cb = kmalloc(sizeof(struct cmdbuf_t) + 3, GFP_ATOMIC);
1141 if (!cb) {
1142 dev_err(cs->dev, "%s: out of memory\n",
1143 __func__);
1144 return;
1145 }
1146 memcpy(cb->buf, "+++", 3);
1147 cb->len = 3;
1148 cb->offset = 0;
1149 cb->next = NULL;
1150 cb->wake_tasklet = NULL;
1151 cs->ops->write_cmd(cs, cb);
1152 }
1153 break;
1154 case ACT_RING:
1155 /* get fresh AT state structure for new CID */
1156 at_state2 = get_free_channel(cs, ev->parameter);
1157 if (!at_state2) {
1158 dev_warn(cs->dev,
1159 "RING ignored: could not allocate channel structure\n");
1160 break;
1161 }
1162
1163 /* initialize AT state structure
1164 * note that bcs may be NULL if no B channel is free
1165 */
1166 at_state2->ConState = 700;
1167 for (i = 0; i < STR_NUM; ++i) {
1168 kfree(at_state2->str_var[i]);
1169 at_state2->str_var[i] = NULL;
1170 }
1171 at_state2->int_var[VAR_ZCTP] = -1;
1172
1173 spin_lock_irqsave(&cs->lock, flags);
1174 at_state2->timer_expires = RING_TIMEOUT;
1175 at_state2->timer_active = 1;
1176 spin_unlock_irqrestore(&cs->lock, flags);
1177 break;
1178 case ACT_ICALL:
1179 handle_icall(cs, bcs, p_at_state);
1180 break;
1181 case ACT_FAILSDOWN:
1182 dev_warn(cs->dev, "Could not shut down the device.\n");
1183 /* fall through */
1184 case ACT_FAKESDOWN:
1185 case ACT_SDOWN:
1186 cs->cur_at_seq = SEQ_NONE;
1187 finish_shutdown(cs);
1188 break;
1189 case ACT_CONNECT:
1190 if (cs->onechannel) {
1191 at_state->pending_commands |= PC_DLE1;
1192 cs->commands_pending = 1;
1193 break;
1194 }
1195 bcs->chstate |= CHS_D_UP;
1196 gigaset_isdn_connD(bcs);
1197 cs->ops->init_bchannel(bcs);
1198 break;
1199 case ACT_DLE1:
1200 cs->cur_at_seq = SEQ_NONE;
1201 bcs = cs->bcs + cs->curchannel;
1202
1203 bcs->chstate |= CHS_D_UP;
1204 gigaset_isdn_connD(bcs);
1205 cs->ops->init_bchannel(bcs);
1206 break;
1207 case ACT_FAKEHUP:
1208 at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
1209 /* fall through */
1210 case ACT_DISCONNECT:
1211 cs->cur_at_seq = SEQ_NONE;
1212 at_state->cid = -1;
1213 if (bcs && cs->onechannel && cs->dle) {
1214 /* Check for other open channels not needed:
1215 * DLE only used for M10x with one B channel.
1216 */
1217 at_state->pending_commands |= PC_DLE0;
1218 cs->commands_pending = 1;
1219 } else
1220 disconnect(p_at_state);
1221 break;
1222 case ACT_FAKEDLE0:
1223 at_state->int_var[VAR_ZDLE] = 0;
1224 cs->dle = 0;
1225 /* fall through */
1226 case ACT_DLE0:
1227 cs->cur_at_seq = SEQ_NONE;
1228 at_state2 = &cs->bcs[cs->curchannel].at_state;
1229 disconnect(&at_state2);
1230 break;
1231 case ACT_ABORTHUP:
1232 cs->cur_at_seq = SEQ_NONE;
1233 dev_warn(cs->dev, "Could not hang up.\n");
1234 at_state->cid = -1;
1235 if (bcs && cs->onechannel)
1236 at_state->pending_commands |= PC_DLE0;
1237 else
1238 disconnect(p_at_state);
1239 schedule_init(cs, MS_RECOVER);
1240 break;
1241 case ACT_FAILDLE0:
1242 cs->cur_at_seq = SEQ_NONE;
1243 dev_warn(cs->dev, "Could not leave DLE mode.\n");
1244 at_state2 = &cs->bcs[cs->curchannel].at_state;
1245 disconnect(&at_state2);
1246 schedule_init(cs, MS_RECOVER);
1247 break;
1248 case ACT_FAILDLE1:
1249 cs->cur_at_seq = SEQ_NONE;
1250 dev_warn(cs->dev,
1251 "Could not enter DLE mode. Trying to hang up.\n");
1252 channel = cs->curchannel;
1253 cs->bcs[channel].at_state.pending_commands |= PC_HUP;
1254 cs->commands_pending = 1;
1255 break;
1256
1257 case ACT_CID: /* got cid; start dialing */
1258 cs->cur_at_seq = SEQ_NONE;
1259 channel = cs->curchannel;
1260 if (ev->parameter > 0 && ev->parameter <= 65535) {
1261 cs->bcs[channel].at_state.cid = ev->parameter;
1262 cs->bcs[channel].at_state.pending_commands |=
1263 PC_DIAL;
1264 cs->commands_pending = 1;
1265 break;
1266 }
1267 /* fall through */
1268 case ACT_FAILCID:
1269 cs->cur_at_seq = SEQ_NONE;
1270 channel = cs->curchannel;
1271 if (!reinit_and_retry(cs, channel)) {
1272 dev_warn(cs->dev,
1273 "Could not get a call ID. Cannot dial.\n");
1274 at_state2 = &cs->bcs[channel].at_state;
1275 disconnect(&at_state2);
1276 }
1277 break;
1278 case ACT_ABORTCID:
1279 cs->cur_at_seq = SEQ_NONE;
1280 at_state2 = &cs->bcs[cs->curchannel].at_state;
1281 disconnect(&at_state2);
1282 break;
1283
1284 case ACT_DIALING:
1285 case ACT_ACCEPTED:
1286 cs->cur_at_seq = SEQ_NONE;
1287 break;
1288
1289 case ACT_ABORTACCEPT: /* hangup/error/timeout during ICALL procssng */
1290 disconnect(p_at_state);
1291 break;
1292
1293 case ACT_ABORTDIAL: /* error/timeout during dial preparation */
1294 cs->cur_at_seq = SEQ_NONE;
1295 at_state->pending_commands |= PC_HUP;
1296 cs->commands_pending = 1;
1297 break;
1298
1299 case ACT_REMOTEREJECT: /* DISCONNECT_IND after dialling */
1300 case ACT_CONNTIMEOUT: /* timeout waiting for ZSAU=ACTIVE */
1301 case ACT_REMOTEHUP: /* DISCONNECT_IND with established connection */
1302 at_state->pending_commands |= PC_HUP;
1303 cs->commands_pending = 1;
1304 break;
1305 case ACT_GETSTRING: /* warning: RING, ZDLE, ...
1306 are not handled properly anymore */
1307 at_state->getstring = 1;
1308 break;
1309 case ACT_SETVER:
1310 if (!ev->ptr) {
1311 *p_genresp = 1;
1312 *p_resp_code = RSP_ERROR;
1313 break;
1314 }
1315 s = ev->ptr;
1316
1317 if (!strcmp(s, "OK")) {
1318 /* OK without version string: assume old response */
1319 *p_genresp = 1;
1320 *p_resp_code = RSP_NONE;
1321 break;
1322 }
1323
1324 for (i = 0; i < 4; ++i) {
1325 val = simple_strtoul(s, (char **) &e, 10);
1326 if (val > INT_MAX || e == s)
1327 break;
1328 if (i == 3) {
1329 if (*e)
1330 break;
1331 } else if (*e != '.')
1332 break;
1333 else
1334 s = e + 1;
1335 cs->fwver[i] = val;
1336 }
1337 if (i != 4) {
1338 *p_genresp = 1;
1339 *p_resp_code = RSP_ERROR;
1340 break;
1341 }
1342 /*at_state->getstring = 1;*/
1343 cs->gotfwver = 0;
1344 break;
1345 case ACT_GOTVER:
1346 if (cs->gotfwver == 0) {
1347 cs->gotfwver = 1;
1348 gig_dbg(DEBUG_EVENT,
1349 "firmware version %02d.%03d.%02d.%02d",
1350 cs->fwver[0], cs->fwver[1],
1351 cs->fwver[2], cs->fwver[3]);
1352 break;
1353 }
1354 /* fall through */
1355 case ACT_FAILVER:
1356 cs->gotfwver = -1;
1357 dev_err(cs->dev, "could not read firmware version.\n");
1358 break;
1359 case ACT_ERROR:
1360 gig_dbg(DEBUG_ANY, "%s: ERROR response in ConState %d",
1361 __func__, at_state->ConState);
1362 cs->cur_at_seq = SEQ_NONE;
1363 break;
1364 case ACT_DEBUG:
1365 gig_dbg(DEBUG_ANY, "%s: resp_code %d in ConState %d",
1366 __func__, ev->type, at_state->ConState);
1367 break;
1368 case ACT_WARN:
1369 dev_warn(cs->dev, "%s: resp_code %d in ConState %d!\n",
1370 __func__, ev->type, at_state->ConState);
1371 break;
1372 case ACT_ZCAU:
1373 dev_warn(cs->dev, "cause code %04x in connection state %d.\n",
1374 ev->parameter, at_state->ConState);
1375 break;
1376
1377 /* events from the LL */
1378 case ACT_DIAL:
1379 start_dial(at_state, ev->ptr, ev->parameter);
1380 break;
1381 case ACT_ACCEPT:
1382 start_accept(at_state);
1383 break;
1384 case ACT_HUP:
1385 at_state->pending_commands |= PC_HUP;
1386 gig_dbg(DEBUG_EVENT, "Scheduling PC_HUP");
1387 cs->commands_pending = 1;
1388 break;
1389
1390 /* hotplug events */
1391 case ACT_STOP:
1392 do_stop(cs);
1393 break;
1394 case ACT_START:
1395 do_start(cs);
1396 break;
1397
1398 /* events from the interface */
1399 case ACT_IF_LOCK:
1400 cs->cmd_result = ev->parameter ? do_lock(cs) : do_unlock(cs);
1401 cs->waiting = 0;
1402 wake_up(&cs->waitqueue);
1403 break;
1404 case ACT_IF_VER:
1405 if (ev->parameter != 0)
1406 cs->cmd_result = -EINVAL;
1407 else if (cs->gotfwver != 1) {
1408 cs->cmd_result = -ENOENT;
1409 } else {
1410 memcpy(ev->arg, cs->fwver, sizeof cs->fwver);
1411 cs->cmd_result = 0;
1412 }
1413 cs->waiting = 0;
1414 wake_up(&cs->waitqueue);
1415 break;
1416
1417 /* events from the proc file system */
1418 case ACT_PROC_CIDMODE:
1419 spin_lock_irqsave(&cs->lock, flags);
1420 if (ev->parameter != cs->cidmode) {
1421 cs->cidmode = ev->parameter;
1422 if (ev->parameter) {
1423 cs->at_state.pending_commands |= PC_CIDMODE;
1424 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1425 } else {
1426 cs->at_state.pending_commands |= PC_UMMODE;
1427 gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
1428 }
1429 cs->commands_pending = 1;
1430 }
1431 spin_unlock_irqrestore(&cs->lock, flags);
1432 cs->waiting = 0;
1433 wake_up(&cs->waitqueue);
1434 break;
1435
1436 /* events from the hardware drivers */
1437 case ACT_NOTIFY_BC_DOWN:
1438 bchannel_down(bcs);
1439 break;
1440 case ACT_NOTIFY_BC_UP:
1441 bchannel_up(bcs);
1442 break;
1443 case ACT_SHUTDOWN:
1444 do_shutdown(cs);
1445 break;
1446
1447
1448 default:
1449 if (action >= ACT_CMD && action < ACT_CMD + AT_NUM) {
1450 *pp_command = at_state->bcs->commands[action - ACT_CMD];
1451 if (!*pp_command) {
1452 *p_genresp = 1;
1453 *p_resp_code = RSP_NULL;
1454 }
1455 } else
1456 dev_err(cs->dev, "%s: action==%d!\n", __func__, action);
1457 }
1458 }
1459
1460 /* State machine to do the calling and hangup procedure */
process_event(struct cardstate * cs,struct event_t * ev)1461 static void process_event(struct cardstate *cs, struct event_t *ev)
1462 {
1463 struct bc_state *bcs;
1464 char *p_command = NULL;
1465 struct reply_t *rep;
1466 int rcode;
1467 int genresp = 0;
1468 int resp_code = RSP_ERROR;
1469 int sendcid;
1470 struct at_state_t *at_state;
1471 int index;
1472 int curact;
1473 unsigned long flags;
1474
1475 if (ev->cid >= 0) {
1476 at_state = at_state_from_cid(cs, ev->cid);
1477 if (!at_state) {
1478 gig_dbg(DEBUG_EVENT, "event %d for invalid cid %d",
1479 ev->type, ev->cid);
1480 gigaset_add_event(cs, &cs->at_state, RSP_WRONG_CID,
1481 NULL, 0, NULL);
1482 return;
1483 }
1484 } else {
1485 at_state = ev->at_state;
1486 if (at_state_invalid(cs, at_state)) {
1487 gig_dbg(DEBUG_EVENT, "event for invalid at_state %p",
1488 at_state);
1489 return;
1490 }
1491 }
1492
1493 gig_dbg(DEBUG_EVENT, "connection state %d, event %d",
1494 at_state->ConState, ev->type);
1495
1496 bcs = at_state->bcs;
1497 sendcid = at_state->cid;
1498
1499 /* Setting the pointer to the dial array */
1500 rep = at_state->replystruct;
1501
1502 spin_lock_irqsave(&cs->lock, flags);
1503 if (ev->type == EV_TIMEOUT) {
1504 if (ev->parameter != at_state->timer_index
1505 || !at_state->timer_active) {
1506 ev->type = RSP_NONE; /* old timeout */
1507 gig_dbg(DEBUG_EVENT, "old timeout");
1508 } else if (!at_state->waiting)
1509 gig_dbg(DEBUG_EVENT, "timeout occurred");
1510 else
1511 gig_dbg(DEBUG_EVENT, "stopped waiting");
1512 }
1513 spin_unlock_irqrestore(&cs->lock, flags);
1514
1515 /* if the response belongs to a variable in at_state->int_var[VAR_XXXX]
1516 or at_state->str_var[STR_XXXX], set it */
1517 if (ev->type >= RSP_VAR && ev->type < RSP_VAR + VAR_NUM) {
1518 index = ev->type - RSP_VAR;
1519 at_state->int_var[index] = ev->parameter;
1520 } else if (ev->type >= RSP_STR && ev->type < RSP_STR + STR_NUM) {
1521 index = ev->type - RSP_STR;
1522 kfree(at_state->str_var[index]);
1523 at_state->str_var[index] = ev->ptr;
1524 ev->ptr = NULL; /* prevent process_events() from
1525 deallocating ptr */
1526 }
1527
1528 if (ev->type == EV_TIMEOUT || ev->type == RSP_STRING)
1529 at_state->getstring = 0;
1530
1531 /* Search row in dial array which matches modem response and current
1532 constate */
1533 for (;; rep++) {
1534 rcode = rep->resp_code;
1535 if (rcode == RSP_LAST) {
1536 /* found nothing...*/
1537 dev_warn(cs->dev, "%s: rcode=RSP_LAST: "
1538 "resp_code %d in ConState %d!\n",
1539 __func__, ev->type, at_state->ConState);
1540 return;
1541 }
1542 if ((rcode == RSP_ANY || rcode == ev->type)
1543 && ((int) at_state->ConState >= rep->min_ConState)
1544 && (rep->max_ConState < 0
1545 || (int) at_state->ConState <= rep->max_ConState)
1546 && (rep->parameter < 0 || rep->parameter == ev->parameter))
1547 break;
1548 }
1549
1550 p_command = rep->command;
1551
1552 at_state->waiting = 0;
1553 for (curact = 0; curact < MAXACT; ++curact) {
1554 /* The row tells us what we should do ..
1555 */
1556 do_action(rep->action[curact], cs, bcs, &at_state, &p_command,
1557 &genresp, &resp_code, ev);
1558 if (!at_state)
1559 break; /* may be freed after disconnect */
1560 }
1561
1562 if (at_state) {
1563 /* Jump to the next con-state regarding the array */
1564 if (rep->new_ConState >= 0)
1565 at_state->ConState = rep->new_ConState;
1566
1567 if (genresp) {
1568 spin_lock_irqsave(&cs->lock, flags);
1569 at_state->timer_expires = 0;
1570 at_state->timer_active = 0;
1571 spin_unlock_irqrestore(&cs->lock, flags);
1572 gigaset_add_event(cs, at_state, resp_code,
1573 NULL, 0, NULL);
1574 } else {
1575 /* Send command to modem if not NULL... */
1576 if (p_command) {
1577 if (cs->connected)
1578 send_command(cs, p_command,
1579 sendcid, cs->dle,
1580 GFP_ATOMIC);
1581 else
1582 gigaset_add_event(cs, at_state,
1583 RSP_NODEV,
1584 NULL, 0, NULL);
1585 }
1586
1587 spin_lock_irqsave(&cs->lock, flags);
1588 if (!rep->timeout) {
1589 at_state->timer_expires = 0;
1590 at_state->timer_active = 0;
1591 } else if (rep->timeout > 0) { /* new timeout */
1592 at_state->timer_expires = rep->timeout * 10;
1593 at_state->timer_active = 1;
1594 ++at_state->timer_index;
1595 }
1596 spin_unlock_irqrestore(&cs->lock, flags);
1597 }
1598 }
1599 }
1600
schedule_sequence(struct cardstate * cs,struct at_state_t * at_state,int sequence)1601 static void schedule_sequence(struct cardstate *cs,
1602 struct at_state_t *at_state, int sequence)
1603 {
1604 cs->cur_at_seq = sequence;
1605 gigaset_add_event(cs, at_state, RSP_INIT, NULL, sequence, NULL);
1606 }
1607
process_command_flags(struct cardstate * cs)1608 static void process_command_flags(struct cardstate *cs)
1609 {
1610 struct at_state_t *at_state = NULL;
1611 struct bc_state *bcs;
1612 int i;
1613 int sequence;
1614 unsigned long flags;
1615
1616 cs->commands_pending = 0;
1617
1618 if (cs->cur_at_seq) {
1619 gig_dbg(DEBUG_EVENT, "not searching scheduled commands: busy");
1620 return;
1621 }
1622
1623 gig_dbg(DEBUG_EVENT, "searching scheduled commands");
1624
1625 sequence = SEQ_NONE;
1626
1627 /* clear pending_commands and hangup channels on shutdown */
1628 if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1629 cs->at_state.pending_commands &= ~PC_CIDMODE;
1630 for (i = 0; i < cs->channels; ++i) {
1631 bcs = cs->bcs + i;
1632 at_state = &bcs->at_state;
1633 at_state->pending_commands &=
1634 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1635 if (at_state->cid > 0)
1636 at_state->pending_commands |= PC_HUP;
1637 if (at_state->pending_commands & PC_CID) {
1638 at_state->pending_commands |= PC_NOCID;
1639 at_state->pending_commands &= ~PC_CID;
1640 }
1641 }
1642 }
1643
1644 /* clear pending_commands and hangup channels on reset */
1645 if (cs->at_state.pending_commands & PC_INIT) {
1646 cs->at_state.pending_commands &= ~PC_CIDMODE;
1647 for (i = 0; i < cs->channels; ++i) {
1648 bcs = cs->bcs + i;
1649 at_state = &bcs->at_state;
1650 at_state->pending_commands &=
1651 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1652 if (at_state->cid > 0)
1653 at_state->pending_commands |= PC_HUP;
1654 if (cs->mstate == MS_RECOVER) {
1655 if (at_state->pending_commands & PC_CID) {
1656 at_state->pending_commands |= PC_NOCID;
1657 at_state->pending_commands &= ~PC_CID;
1658 }
1659 }
1660 }
1661 }
1662
1663 /* only switch back to unimodem mode if no commands are pending and
1664 * no channels are up */
1665 spin_lock_irqsave(&cs->lock, flags);
1666 if (cs->at_state.pending_commands == PC_UMMODE
1667 && !cs->cidmode
1668 && list_empty(&cs->temp_at_states)
1669 && cs->mode == M_CID) {
1670 sequence = SEQ_UMMODE;
1671 at_state = &cs->at_state;
1672 for (i = 0; i < cs->channels; ++i) {
1673 bcs = cs->bcs + i;
1674 if (bcs->at_state.pending_commands ||
1675 bcs->at_state.cid > 0) {
1676 sequence = SEQ_NONE;
1677 break;
1678 }
1679 }
1680 }
1681 spin_unlock_irqrestore(&cs->lock, flags);
1682 cs->at_state.pending_commands &= ~PC_UMMODE;
1683 if (sequence != SEQ_NONE) {
1684 schedule_sequence(cs, at_state, sequence);
1685 return;
1686 }
1687
1688 for (i = 0; i < cs->channels; ++i) {
1689 bcs = cs->bcs + i;
1690 if (bcs->at_state.pending_commands & PC_HUP) {
1691 bcs->at_state.pending_commands &= ~PC_HUP;
1692 if (bcs->at_state.pending_commands & PC_CID) {
1693 /* not yet dialing: PC_NOCID is sufficient */
1694 bcs->at_state.pending_commands |= PC_NOCID;
1695 bcs->at_state.pending_commands &= ~PC_CID;
1696 } else {
1697 schedule_sequence(cs, &bcs->at_state, SEQ_HUP);
1698 return;
1699 }
1700 }
1701 if (bcs->at_state.pending_commands & PC_NOCID) {
1702 bcs->at_state.pending_commands &= ~PC_NOCID;
1703 cs->curchannel = bcs->channel;
1704 schedule_sequence(cs, &cs->at_state, SEQ_NOCID);
1705 return;
1706 } else if (bcs->at_state.pending_commands & PC_DLE0) {
1707 bcs->at_state.pending_commands &= ~PC_DLE0;
1708 cs->curchannel = bcs->channel;
1709 schedule_sequence(cs, &cs->at_state, SEQ_DLE0);
1710 return;
1711 }
1712 }
1713
1714 list_for_each_entry(at_state, &cs->temp_at_states, list)
1715 if (at_state->pending_commands & PC_HUP) {
1716 at_state->pending_commands &= ~PC_HUP;
1717 schedule_sequence(cs, at_state, SEQ_HUP);
1718 return;
1719 }
1720
1721 if (cs->at_state.pending_commands & PC_INIT) {
1722 cs->at_state.pending_commands &= ~PC_INIT;
1723 cs->dle = 0;
1724 cs->inbuf->inputstate = INS_command;
1725 schedule_sequence(cs, &cs->at_state, SEQ_INIT);
1726 return;
1727 }
1728 if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1729 cs->at_state.pending_commands &= ~PC_SHUTDOWN;
1730 schedule_sequence(cs, &cs->at_state, SEQ_SHUTDOWN);
1731 return;
1732 }
1733 if (cs->at_state.pending_commands & PC_CIDMODE) {
1734 cs->at_state.pending_commands &= ~PC_CIDMODE;
1735 if (cs->mode == M_UNIMODEM) {
1736 cs->retry_count = 1;
1737 schedule_sequence(cs, &cs->at_state, SEQ_CIDMODE);
1738 return;
1739 }
1740 }
1741
1742 for (i = 0; i < cs->channels; ++i) {
1743 bcs = cs->bcs + i;
1744 if (bcs->at_state.pending_commands & PC_DLE1) {
1745 bcs->at_state.pending_commands &= ~PC_DLE1;
1746 cs->curchannel = bcs->channel;
1747 schedule_sequence(cs, &cs->at_state, SEQ_DLE1);
1748 return;
1749 }
1750 if (bcs->at_state.pending_commands & PC_ACCEPT) {
1751 bcs->at_state.pending_commands &= ~PC_ACCEPT;
1752 schedule_sequence(cs, &bcs->at_state, SEQ_ACCEPT);
1753 return;
1754 }
1755 if (bcs->at_state.pending_commands & PC_DIAL) {
1756 bcs->at_state.pending_commands &= ~PC_DIAL;
1757 schedule_sequence(cs, &bcs->at_state, SEQ_DIAL);
1758 return;
1759 }
1760 if (bcs->at_state.pending_commands & PC_CID) {
1761 switch (cs->mode) {
1762 case M_UNIMODEM:
1763 cs->at_state.pending_commands |= PC_CIDMODE;
1764 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1765 cs->commands_pending = 1;
1766 return;
1767 case M_UNKNOWN:
1768 schedule_init(cs, MS_INIT);
1769 return;
1770 }
1771 bcs->at_state.pending_commands &= ~PC_CID;
1772 cs->curchannel = bcs->channel;
1773 cs->retry_count = 2;
1774 schedule_sequence(cs, &cs->at_state, SEQ_CID);
1775 return;
1776 }
1777 }
1778 }
1779
process_events(struct cardstate * cs)1780 static void process_events(struct cardstate *cs)
1781 {
1782 struct event_t *ev;
1783 unsigned head, tail;
1784 int i;
1785 int check_flags = 0;
1786 int was_busy;
1787 unsigned long flags;
1788
1789 spin_lock_irqsave(&cs->ev_lock, flags);
1790 head = cs->ev_head;
1791
1792 for (i = 0; i < 2 * MAX_EVENTS; ++i) {
1793 tail = cs->ev_tail;
1794 if (tail == head) {
1795 if (!check_flags && !cs->commands_pending)
1796 break;
1797 check_flags = 0;
1798 spin_unlock_irqrestore(&cs->ev_lock, flags);
1799 process_command_flags(cs);
1800 spin_lock_irqsave(&cs->ev_lock, flags);
1801 tail = cs->ev_tail;
1802 if (tail == head) {
1803 if (!cs->commands_pending)
1804 break;
1805 continue;
1806 }
1807 }
1808
1809 ev = cs->events + head;
1810 was_busy = cs->cur_at_seq != SEQ_NONE;
1811 spin_unlock_irqrestore(&cs->ev_lock, flags);
1812 process_event(cs, ev);
1813 spin_lock_irqsave(&cs->ev_lock, flags);
1814 kfree(ev->ptr);
1815 ev->ptr = NULL;
1816 if (was_busy && cs->cur_at_seq == SEQ_NONE)
1817 check_flags = 1;
1818
1819 head = (head + 1) % MAX_EVENTS;
1820 cs->ev_head = head;
1821 }
1822
1823 spin_unlock_irqrestore(&cs->ev_lock, flags);
1824
1825 if (i == 2 * MAX_EVENTS) {
1826 dev_err(cs->dev,
1827 "infinite loop in process_events; aborting.\n");
1828 }
1829 }
1830
1831 /* tasklet scheduled on any event received from the Gigaset device
1832 * parameter:
1833 * data ISDN controller state structure
1834 */
gigaset_handle_event(unsigned long data)1835 void gigaset_handle_event(unsigned long data)
1836 {
1837 struct cardstate *cs = (struct cardstate *) data;
1838
1839 /* handle incoming data on control/common channel */
1840 if (cs->inbuf->head != cs->inbuf->tail) {
1841 gig_dbg(DEBUG_INTR, "processing new data");
1842 cs->ops->handle_input(cs->inbuf);
1843 }
1844
1845 process_events(cs);
1846 }
1847