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include: replace linux/module.h with "struct module" wherever possible
[linux-2.6/next.git] / drivers / isdn / gigaset / ev-layer.c
blobba74646cf0e481fd2b6741fc4d012aa1cb5a2fc5
1 /*
2 * Stuff used by all variants of the driver
3 *
4 * Copyright (c) 2001 by Stefan Eilers,
5 * Hansjoerg Lipp <hjlipp@web.de>,
6 * Tilman Schmidt <tilman@imap.cc>.
7 *
8 * =====================================================================
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
13 * =====================================================================
14 */
15
16 #include "gigaset.h"
17
18 /* ========================================================== */
19 /* bit masks for pending commands */
20 #define PC_DIAL 0x001
21 #define PC_HUP 0x002
22 #define PC_INIT 0x004
23 #define PC_DLE0 0x008
24 #define PC_DLE1 0x010
25 #define PC_SHUTDOWN 0x020
26 #define PC_ACCEPT 0x040
27 #define PC_CID 0x080
28 #define PC_NOCID 0x100
29 #define PC_CIDMODE 0x200
30 #define PC_UMMODE 0x400
31
32 /* types of modem responses */
33 #define RT_NOTHING 0
34 #define RT_ZSAU 1
35 #define RT_RING 2
36 #define RT_NUMBER 3
37 #define RT_STRING 4
38 #define RT_ZCAU 6
39
40 /* Possible ASCII responses */
41 #define RSP_OK 0
42 #define RSP_ERROR 1
43 #define RSP_ZGCI 3
44 #define RSP_RING 4
45 #define RSP_ZVLS 5
46 #define RSP_ZCAU 6
47
48 /* responses with values to store in at_state */
49 /* - numeric */
50 #define RSP_VAR 100
51 #define RSP_ZSAU (RSP_VAR + VAR_ZSAU)
52 #define RSP_ZDLE (RSP_VAR + VAR_ZDLE)
53 #define RSP_ZCTP (RSP_VAR + VAR_ZCTP)
54 /* - string */
55 #define RSP_STR (RSP_VAR + VAR_NUM)
56 #define RSP_NMBR (RSP_STR + STR_NMBR)
57 #define RSP_ZCPN (RSP_STR + STR_ZCPN)
58 #define RSP_ZCON (RSP_STR + STR_ZCON)
59 #define RSP_ZBC (RSP_STR + STR_ZBC)
60 #define RSP_ZHLC (RSP_STR + STR_ZHLC)
61
62 #define RSP_WRONG_CID -2 /* unknown cid in cmd */
63 #define RSP_INVAL -6 /* invalid response */
64 #define RSP_NODEV -9 /* device not connected */
65
66 #define RSP_NONE -19
67 #define RSP_STRING -20
68 #define RSP_NULL -21
69 #define RSP_INIT -27
70 #define RSP_ANY -26
71 #define RSP_LAST -28
72
73 /* actions for process_response */
74 #define ACT_NOTHING 0
75 #define ACT_SETDLE1 1
76 #define ACT_SETDLE0 2
77 #define ACT_FAILINIT 3
78 #define ACT_HUPMODEM 4
79 #define ACT_CONFIGMODE 5
80 #define ACT_INIT 6
81 #define ACT_DLE0 7
82 #define ACT_DLE1 8
83 #define ACT_FAILDLE0 9
84 #define ACT_FAILDLE1 10
85 #define ACT_RING 11
86 #define ACT_CID 12
87 #define ACT_FAILCID 13
88 #define ACT_SDOWN 14
89 #define ACT_FAILSDOWN 15
90 #define ACT_DEBUG 16
91 #define ACT_WARN 17
92 #define ACT_DIALING 18
93 #define ACT_ABORTDIAL 19
94 #define ACT_DISCONNECT 20
95 #define ACT_CONNECT 21
96 #define ACT_REMOTEREJECT 22
97 #define ACT_CONNTIMEOUT 23
98 #define ACT_REMOTEHUP 24
99 #define ACT_ABORTHUP 25
100 #define ACT_ICALL 26
101 #define ACT_ACCEPTED 27
102 #define ACT_ABORTACCEPT 28
103 #define ACT_TIMEOUT 29
104 #define ACT_GETSTRING 30
105 #define ACT_SETVER 31
106 #define ACT_FAILVER 32
107 #define ACT_GOTVER 33
108 #define ACT_TEST 34
109 #define ACT_ERROR 35
110 #define ACT_ABORTCID 36
111 #define ACT_ZCAU 37
112 #define ACT_NOTIFY_BC_DOWN 38
113 #define ACT_NOTIFY_BC_UP 39
114 #define ACT_DIAL 40
115 #define ACT_ACCEPT 41
116 #define ACT_HUP 43
117 #define ACT_IF_LOCK 44
118 #define ACT_START 45
119 #define ACT_STOP 46
120 #define ACT_FAKEDLE0 47
121 #define ACT_FAKEHUP 48
122 #define ACT_FAKESDOWN 49
123 #define ACT_SHUTDOWN 50
124 #define ACT_PROC_CIDMODE 51
125 #define ACT_UMODESET 52
126 #define ACT_FAILUMODE 53
127 #define ACT_CMODESET 54
128 #define ACT_FAILCMODE 55
129 #define ACT_IF_VER 56
130 #define ACT_CMD 100
131
132 /* at command sequences */
133 #define SEQ_NONE 0
134 #define SEQ_INIT 100
135 #define SEQ_DLE0 200
136 #define SEQ_DLE1 250
137 #define SEQ_CID 300
138 #define SEQ_NOCID 350
139 #define SEQ_HUP 400
140 #define SEQ_DIAL 600
141 #define SEQ_ACCEPT 720
142 #define SEQ_SHUTDOWN 500
143 #define SEQ_CIDMODE 10
144 #define SEQ_UMMODE 11
145
146
147 /* 100: init, 200: dle0, 250:dle1, 300: get cid (dial), 350: "hup" (no cid),
148 * 400: hup, 500: reset, 600: dial, 700: ring */
149 struct reply_t gigaset_tab_nocid[] =
150 {
151 /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout,
152 * action, command */
153
154 /* initialize device, set cid mode if possible */
155 {RSP_INIT, -1, -1, SEQ_INIT, 100, 1, {ACT_TIMEOUT} },
156
157 {EV_TIMEOUT, 100, 100, -1, 101, 3, {0}, "Z\r"},
158 {RSP_OK, 101, 103, -1, 120, 5, {ACT_GETSTRING},
159 "+GMR\r"},
160
161 {EV_TIMEOUT, 101, 101, -1, 102, 5, {0}, "Z\r"},
162 {RSP_ERROR, 101, 101, -1, 102, 5, {0}, "Z\r"},
163
164 {EV_TIMEOUT, 102, 102, -1, 108, 5, {ACT_SETDLE1},
165 "^SDLE=0\r"},
166 {RSP_OK, 108, 108, -1, 104, -1},
167 {RSP_ZDLE, 104, 104, 0, 103, 5, {0}, "Z\r"},
168 {EV_TIMEOUT, 104, 104, -1, 0, 0, {ACT_FAILINIT} },
169 {RSP_ERROR, 108, 108, -1, 0, 0, {ACT_FAILINIT} },
170
171 {EV_TIMEOUT, 108, 108, -1, 105, 2, {ACT_SETDLE0,
172 ACT_HUPMODEM,
173 ACT_TIMEOUT} },
174 {EV_TIMEOUT, 105, 105, -1, 103, 5, {0}, "Z\r"},
175
176 {RSP_ERROR, 102, 102, -1, 107, 5, {0}, "^GETPRE\r"},
177 {RSP_OK, 107, 107, -1, 0, 0, {ACT_CONFIGMODE} },
178 {RSP_ERROR, 107, 107, -1, 0, 0, {ACT_FAILINIT} },
179 {EV_TIMEOUT, 107, 107, -1, 0, 0, {ACT_FAILINIT} },
180
181 {RSP_ERROR, 103, 103, -1, 0, 0, {ACT_FAILINIT} },
182 {EV_TIMEOUT, 103, 103, -1, 0, 0, {ACT_FAILINIT} },
183
184 {RSP_STRING, 120, 120, -1, 121, -1, {ACT_SETVER} },
185
186 {EV_TIMEOUT, 120, 121, -1, 0, 0, {ACT_FAILVER,
187 ACT_INIT} },
188 {RSP_ERROR, 120, 121, -1, 0, 0, {ACT_FAILVER,
189 ACT_INIT} },
190 {RSP_OK, 121, 121, -1, 0, 0, {ACT_GOTVER,
191 ACT_INIT} },
192
193 /* leave dle mode */
194 {RSP_INIT, 0, 0, SEQ_DLE0, 201, 5, {0}, "^SDLE=0\r"},
195 {RSP_OK, 201, 201, -1, 202, -1},
196 {RSP_ZDLE, 202, 202, 0, 0, 0, {ACT_DLE0} },
197 {RSP_NODEV, 200, 249, -1, 0, 0, {ACT_FAKEDLE0} },
198 {RSP_ERROR, 200, 249, -1, 0, 0, {ACT_FAILDLE0} },
199 {EV_TIMEOUT, 200, 249, -1, 0, 0, {ACT_FAILDLE0} },
200
201 /* enter dle mode */
202 {RSP_INIT, 0, 0, SEQ_DLE1, 251, 5, {0}, "^SDLE=1\r"},
203 {RSP_OK, 251, 251, -1, 252, -1},
204 {RSP_ZDLE, 252, 252, 1, 0, 0, {ACT_DLE1} },
205 {RSP_ERROR, 250, 299, -1, 0, 0, {ACT_FAILDLE1} },
206 {EV_TIMEOUT, 250, 299, -1, 0, 0, {ACT_FAILDLE1} },
207
208 /* incoming call */
209 {RSP_RING, -1, -1, -1, -1, -1, {ACT_RING} },
210
211 /* get cid */
212 {RSP_INIT, 0, 0, SEQ_CID, 301, 5, {0}, "^SGCI?\r"},
213 {RSP_OK, 301, 301, -1, 302, -1},
214 {RSP_ZGCI, 302, 302, -1, 0, 0, {ACT_CID} },
215 {RSP_ERROR, 301, 349, -1, 0, 0, {ACT_FAILCID} },
216 {EV_TIMEOUT, 301, 349, -1, 0, 0, {ACT_FAILCID} },
217
218 /* enter cid mode */
219 {RSP_INIT, 0, 0, SEQ_CIDMODE, 150, 5, {0}, "^SGCI=1\r"},
220 {RSP_OK, 150, 150, -1, 0, 0, {ACT_CMODESET} },
221 {RSP_ERROR, 150, 150, -1, 0, 0, {ACT_FAILCMODE} },
222 {EV_TIMEOUT, 150, 150, -1, 0, 0, {ACT_FAILCMODE} },
223
224 /* leave cid mode */
225 {RSP_INIT, 0, 0, SEQ_UMMODE, 160, 5, {0}, "Z\r"},
226 {RSP_OK, 160, 160, -1, 0, 0, {ACT_UMODESET} },
227 {RSP_ERROR, 160, 160, -1, 0, 0, {ACT_FAILUMODE} },
228 {EV_TIMEOUT, 160, 160, -1, 0, 0, {ACT_FAILUMODE} },
229
230 /* abort getting cid */
231 {RSP_INIT, 0, 0, SEQ_NOCID, 0, 0, {ACT_ABORTCID} },
232
233 /* reset */
234 {RSP_INIT, 0, 0, SEQ_SHUTDOWN, 504, 5, {0}, "Z\r"},
235 {RSP_OK, 504, 504, -1, 0, 0, {ACT_SDOWN} },
236 {RSP_ERROR, 501, 599, -1, 0, 0, {ACT_FAILSDOWN} },
237 {EV_TIMEOUT, 501, 599, -1, 0, 0, {ACT_FAILSDOWN} },
238 {RSP_NODEV, 501, 599, -1, 0, 0, {ACT_FAKESDOWN} },
239
240 {EV_PROC_CIDMODE, -1, -1, -1, -1, -1, {ACT_PROC_CIDMODE} },
241 {EV_IF_LOCK, -1, -1, -1, -1, -1, {ACT_IF_LOCK} },
242 {EV_IF_VER, -1, -1, -1, -1, -1, {ACT_IF_VER} },
243 {EV_START, -1, -1, -1, -1, -1, {ACT_START} },
244 {EV_STOP, -1, -1, -1, -1, -1, {ACT_STOP} },
245 {EV_SHUTDOWN, -1, -1, -1, -1, -1, {ACT_SHUTDOWN} },
246
247 /* misc. */
248 {RSP_ERROR, -1, -1, -1, -1, -1, {ACT_ERROR} },
249 {RSP_ZCAU, -1, -1, -1, -1, -1, {ACT_ZCAU} },
250 {RSP_NONE, -1, -1, -1, -1, -1, {ACT_DEBUG} },
251 {RSP_ANY, -1, -1, -1, -1, -1, {ACT_WARN} },
252 {RSP_LAST}
253 };
254
255 /* 600: start dialing, 650: dial in progress, 800: connection is up, 700: ring,
256 * 400: hup, 750: accepted icall */
257 struct reply_t gigaset_tab_cid[] =
258 {
259 /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout,
260 * action, command */
261
262 /* dial */
263 {EV_DIAL, -1, -1, -1, -1, -1, {ACT_DIAL} },
264 {RSP_INIT, 0, 0, SEQ_DIAL, 601, 5, {ACT_CMD+AT_BC} },
265 {RSP_OK, 601, 601, -1, 603, 5, {ACT_CMD+AT_PROTO} },
266 {RSP_OK, 603, 603, -1, 604, 5, {ACT_CMD+AT_TYPE} },
267 {RSP_OK, 604, 604, -1, 605, 5, {ACT_CMD+AT_MSN} },
268 {RSP_NULL, 605, 605, -1, 606, 5, {ACT_CMD+AT_CLIP} },
269 {RSP_OK, 605, 605, -1, 606, 5, {ACT_CMD+AT_CLIP} },
270 {RSP_NULL, 606, 606, -1, 607, 5, {ACT_CMD+AT_ISO} },
271 {RSP_OK, 606, 606, -1, 607, 5, {ACT_CMD+AT_ISO} },
272 {RSP_OK, 607, 607, -1, 608, 5, {0}, "+VLS=17\r"},
273 {RSP_OK, 608, 608, -1, 609, -1},
274 {RSP_ZSAU, 609, 609, ZSAU_PROCEEDING, 610, 5, {ACT_CMD+AT_DIAL} },
275 {RSP_OK, 610, 610, -1, 650, 0, {ACT_DIALING} },
276
277 {RSP_ERROR, 601, 610, -1, 0, 0, {ACT_ABORTDIAL} },
278 {EV_TIMEOUT, 601, 610, -1, 0, 0, {ACT_ABORTDIAL} },
279
280 /* optional dialing responses */
281 {EV_BC_OPEN, 650, 650, -1, 651, -1},
282 {RSP_ZVLS, 609, 651, 17, -1, -1, {ACT_DEBUG} },
283 {RSP_ZCTP, 610, 651, -1, -1, -1, {ACT_DEBUG} },
284 {RSP_ZCPN, 610, 651, -1, -1, -1, {ACT_DEBUG} },
285 {RSP_ZSAU, 650, 651, ZSAU_CALL_DELIVERED, -1, -1, {ACT_DEBUG} },
286
287 /* connect */
288 {RSP_ZSAU, 650, 650, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT} },
289 {RSP_ZSAU, 651, 651, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT,
290 ACT_NOTIFY_BC_UP} },
291 {RSP_ZSAU, 750, 750, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT} },
292 {RSP_ZSAU, 751, 751, ZSAU_ACTIVE, 800, -1, {ACT_CONNECT,
293 ACT_NOTIFY_BC_UP} },
294 {EV_BC_OPEN, 800, 800, -1, 800, -1, {ACT_NOTIFY_BC_UP} },
295
296 /* remote hangup */
297 {RSP_ZSAU, 650, 651, ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEREJECT} },
298 {RSP_ZSAU, 750, 751, ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEHUP} },
299 {RSP_ZSAU, 800, 800, ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEHUP} },
300
301 /* hangup */
302 {EV_HUP, -1, -1, -1, -1, -1, {ACT_HUP} },
303 {RSP_INIT, -1, -1, SEQ_HUP, 401, 5, {0}, "+VLS=0\r"},
304 {RSP_OK, 401, 401, -1, 402, 5},
305 {RSP_ZVLS, 402, 402, 0, 403, 5},
306 {RSP_ZSAU, 403, 403, ZSAU_DISCONNECT_REQ, -1, -1, {ACT_DEBUG} },
307 {RSP_ZSAU, 403, 403, ZSAU_NULL, 0, 0, {ACT_DISCONNECT} },
308 {RSP_NODEV, 401, 403, -1, 0, 0, {ACT_FAKEHUP} },
309 {RSP_ERROR, 401, 401, -1, 0, 0, {ACT_ABORTHUP} },
310 {EV_TIMEOUT, 401, 403, -1, 0, 0, {ACT_ABORTHUP} },
311
312 {EV_BC_CLOSED, 0, 0, -1, 0, -1, {ACT_NOTIFY_BC_DOWN} },
313
314 /* ring */
315 {RSP_ZBC, 700, 700, -1, -1, -1, {0} },
316 {RSP_ZHLC, 700, 700, -1, -1, -1, {0} },
317 {RSP_NMBR, 700, 700, -1, -1, -1, {0} },
318 {RSP_ZCPN, 700, 700, -1, -1, -1, {0} },
319 {RSP_ZCTP, 700, 700, -1, -1, -1, {0} },
320 {EV_TIMEOUT, 700, 700, -1, 720, 720, {ACT_ICALL} },
321 {EV_BC_CLOSED, 720, 720, -1, 0, -1, {ACT_NOTIFY_BC_DOWN} },
322
323 /*accept icall*/
324 {EV_ACCEPT, -1, -1, -1, -1, -1, {ACT_ACCEPT} },
325 {RSP_INIT, 720, 720, SEQ_ACCEPT, 721, 5, {ACT_CMD+AT_PROTO} },
326 {RSP_OK, 721, 721, -1, 722, 5, {ACT_CMD+AT_ISO} },
327 {RSP_OK, 722, 722, -1, 723, 5, {0}, "+VLS=17\r"},
328 {RSP_OK, 723, 723, -1, 724, 5, {0} },
329 {RSP_ZVLS, 724, 724, 17, 750, 50, {ACT_ACCEPTED} },
330 {RSP_ERROR, 721, 729, -1, 0, 0, {ACT_ABORTACCEPT} },
331 {EV_TIMEOUT, 721, 729, -1, 0, 0, {ACT_ABORTACCEPT} },
332 {RSP_ZSAU, 700, 729, ZSAU_NULL, 0, 0, {ACT_ABORTACCEPT} },
333 {RSP_ZSAU, 700, 729, ZSAU_ACTIVE, 0, 0, {ACT_ABORTACCEPT} },
334 {RSP_ZSAU, 700, 729, ZSAU_DISCONNECT_IND, 0, 0, {ACT_ABORTACCEPT} },
335
336 {EV_BC_OPEN, 750, 750, -1, 751, -1},
337 {EV_TIMEOUT, 750, 751, -1, 0, 0, {ACT_CONNTIMEOUT} },
338
339 /* B channel closed (general case) */
340 {EV_BC_CLOSED, -1, -1, -1, -1, -1, {ACT_NOTIFY_BC_DOWN} },
341
342 /* misc. */
343 {RSP_ZCON, -1, -1, -1, -1, -1, {ACT_DEBUG} },
344 {RSP_ZCAU, -1, -1, -1, -1, -1, {ACT_ZCAU} },
345 {RSP_NONE, -1, -1, -1, -1, -1, {ACT_DEBUG} },
346 {RSP_ANY, -1, -1, -1, -1, -1, {ACT_WARN} },
347 {RSP_LAST}
348 };
349
350
351 static const struct resp_type_t {
352 unsigned char *response;
353 int resp_code;
354 int type;
355 } resp_type[] =
356 {
357 {"OK", RSP_OK, RT_NOTHING},
358 {"ERROR", RSP_ERROR, RT_NOTHING},
359 {"ZSAU", RSP_ZSAU, RT_ZSAU},
360 {"ZCAU", RSP_ZCAU, RT_ZCAU},
361 {"RING", RSP_RING, RT_RING},
362 {"ZGCI", RSP_ZGCI, RT_NUMBER},
363 {"ZVLS", RSP_ZVLS, RT_NUMBER},
364 {"ZCTP", RSP_ZCTP, RT_NUMBER},
365 {"ZDLE", RSP_ZDLE, RT_NUMBER},
366 {"ZHLC", RSP_ZHLC, RT_STRING},
367 {"ZBC", RSP_ZBC, RT_STRING},
368 {"NMBR", RSP_NMBR, RT_STRING},
369 {"ZCPN", RSP_ZCPN, RT_STRING},
370 {"ZCON", RSP_ZCON, RT_STRING},
371 {NULL, 0, 0}
372 };
373
374 static const struct zsau_resp_t {
375 unsigned char *str;
376 int code;
377 } zsau_resp[] =
378 {
379 {"OUTGOING_CALL_PROCEEDING", ZSAU_OUTGOING_CALL_PROCEEDING},
380 {"CALL_DELIVERED", ZSAU_CALL_DELIVERED},
381 {"ACTIVE", ZSAU_ACTIVE},
382 {"DISCONNECT_IND", ZSAU_DISCONNECT_IND},
383 {"NULL", ZSAU_NULL},
384 {"DISCONNECT_REQ", ZSAU_DISCONNECT_REQ},
385 {NULL, ZSAU_UNKNOWN}
386 };
387
388 /* retrieve CID from parsed response
389 * returns 0 if no CID, -1 if invalid CID, or CID value 1..65535
390 */
391 static int cid_of_response(char *s)
392 {
393 int cid;
394 int rc;
395
396 if (s[-1] != ';')
397 return 0; /* no CID separator */
398 rc = kstrtoint(s, 10, &cid);
399 if (rc)
400 return 0; /* CID not numeric */
401 if (cid < 1 || cid > 65535)
402 return -1; /* CID out of range */
403 return cid;
404 }
405
406 /**
407 * gigaset_handle_modem_response() - process received modem response
408 * @cs: device descriptor structure.
409 *
410 * Called by asyncdata/isocdata if a block of data received from the
411 * device must be processed as a modem command response. The data is
412 * already in the cs structure.
413 */
414 void gigaset_handle_modem_response(struct cardstate *cs)
415 {
416 unsigned char *argv[MAX_REC_PARAMS + 1];
417 int params;
418 int i, j;
419 const struct resp_type_t *rt;
420 const struct zsau_resp_t *zr;
421 int curarg;
422 unsigned long flags;
423 unsigned next, tail, head;
424 struct event_t *event;
425 int resp_code;
426 int param_type;
427 int abort;
428 size_t len;
429 int cid;
430 int rawstring;
431
432 len = cs->cbytes;
433 if (!len) {
434 /* ignore additional LFs/CRs (M10x config mode or cx100) */
435 gig_dbg(DEBUG_MCMD, "skipped EOL [%02X]", cs->respdata[len]);
436 return;
437 }
438 cs->respdata[len] = 0;
439 argv[0] = cs->respdata;
440 params = 1;
441 if (cs->at_state.getstring) {
442 /* getstring only allowed without cid at the moment */
443 cs->at_state.getstring = 0;
444 rawstring = 1;
445 cid = 0;
446 } else {
447 /* parse line */
448 for (i = 0; i < len; i++)
449 switch (cs->respdata[i]) {
450 case ';':
451 case ',':
452 case '=':
453 if (params > MAX_REC_PARAMS) {
454 dev_warn(cs->dev,
455 "too many parameters in response\n");
456 /* need last parameter (might be CID) */
457 params--;
458 }
459 argv[params++] = cs->respdata + i + 1;
460 }
461
462 rawstring = 0;
463 cid = params > 1 ? cid_of_response(argv[params-1]) : 0;
464 if (cid < 0) {
465 gigaset_add_event(cs, &cs->at_state, RSP_INVAL,
466 NULL, 0, NULL);
467 return;
468 }
469
470 for (j = 1; j < params; ++j)
471 argv[j][-1] = 0;
472
473 gig_dbg(DEBUG_EVENT, "CMD received: %s", argv[0]);
474 if (cid) {
475 --params;
476 gig_dbg(DEBUG_EVENT, "CID: %s", argv[params]);
477 }
478 gig_dbg(DEBUG_EVENT, "available params: %d", params - 1);
479 for (j = 1; j < params; j++)
480 gig_dbg(DEBUG_EVENT, "param %d: %s", j, argv[j]);
481 }
482
483 spin_lock_irqsave(&cs->ev_lock, flags);
484 head = cs->ev_head;
485 tail = cs->ev_tail;
486
487 abort = 1;
488 curarg = 0;
489 while (curarg < params) {
490 next = (tail + 1) % MAX_EVENTS;
491 if (unlikely(next == head)) {
492 dev_err(cs->dev, "event queue full\n");
493 break;
494 }
495
496 event = cs->events + tail;
497 event->at_state = NULL;
498 event->cid = cid;
499 event->ptr = NULL;
500 event->arg = NULL;
501 tail = next;
502
503 if (rawstring) {
504 resp_code = RSP_STRING;
505 param_type = RT_STRING;
506 } else {
507 for (rt = resp_type; rt->response; ++rt)
508 if (!strcmp(argv[curarg], rt->response))
509 break;
510
511 if (!rt->response) {
512 event->type = RSP_NONE;
513 gig_dbg(DEBUG_EVENT,
514 "unknown modem response: '%s'\n",
515 argv[curarg]);
516 break;
517 }
518
519 resp_code = rt->resp_code;
520 param_type = rt->type;
521 ++curarg;
522 }
523
524 event->type = resp_code;
525
526 switch (param_type) {
527 case RT_NOTHING:
528 break;
529 case RT_RING:
530 if (!cid) {
531 dev_err(cs->dev,
532 "received RING without CID!\n");
533 event->type = RSP_INVAL;
534 abort = 1;
535 } else {
536 event->cid = 0;
537 event->parameter = cid;
538 abort = 0;
539 }
540 break;
541 case RT_ZSAU:
542 if (curarg >= params) {
543 event->parameter = ZSAU_NONE;
544 break;
545 }
546 for (zr = zsau_resp; zr->str; ++zr)
547 if (!strcmp(argv[curarg], zr->str))
548 break;
549 event->parameter = zr->code;
550 if (!zr->str)
551 dev_warn(cs->dev,
552 "%s: unknown parameter %s after ZSAU\n",
553 __func__, argv[curarg]);
554 ++curarg;
555 break;
556 case RT_STRING:
557 if (curarg < params) {
558 event->ptr = kstrdup(argv[curarg], GFP_ATOMIC);
559 if (!event->ptr)
560 dev_err(cs->dev, "out of memory\n");
561 ++curarg;
562 }
563 gig_dbg(DEBUG_EVENT, "string==%s",
564 event->ptr ? (char *) event->ptr : "NULL");
565 break;
566 case RT_ZCAU:
567 event->parameter = -1;
568 if (curarg + 1 < params) {
569 u8 type, value;
570
571 i = kstrtou8(argv[curarg++], 16, &type);
572 j = kstrtou8(argv[curarg++], 16, &value);
573 if (i == 0 && j == 0)
574 event->parameter = (type << 8) | value;
575 } else
576 curarg = params - 1;
577 break;
578 case RT_NUMBER:
579 if (curarg >= params ||
580 kstrtoint(argv[curarg++], 10, &event->parameter))
581 event->parameter = -1;
582 gig_dbg(DEBUG_EVENT, "parameter==%d", event->parameter);
583 break;
584 }
585
586 if (resp_code == RSP_ZDLE)
587 cs->dle = event->parameter;
588
589 if (abort)
590 break;
591 }
592
593 cs->ev_tail = tail;
594 spin_unlock_irqrestore(&cs->ev_lock, flags);
595
596 if (curarg != params)
597 gig_dbg(DEBUG_EVENT,
598 "invalid number of processed parameters: %d/%d",
599 curarg, params);
600 }
601 EXPORT_SYMBOL_GPL(gigaset_handle_modem_response);
602
603 /* disconnect
604 * process closing of connection associated with given AT state structure
605 */
606 static void disconnect(struct at_state_t **at_state_p)
607 {
608 unsigned long flags;
609 struct bc_state *bcs = (*at_state_p)->bcs;
610 struct cardstate *cs = (*at_state_p)->cs;
611
612 spin_lock_irqsave(&cs->lock, flags);
613 ++(*at_state_p)->seq_index;
614
615 /* revert to selected idle mode */
616 if (!cs->cidmode) {
617 cs->at_state.pending_commands |= PC_UMMODE;
618 gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
619 cs->commands_pending = 1;
620 }
621 spin_unlock_irqrestore(&cs->lock, flags);
622
623 if (bcs) {
624 /* B channel assigned: invoke hardware specific handler */
625 cs->ops->close_bchannel(bcs);
626 /* notify LL */
627 if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
628 bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
629 gigaset_isdn_hupD(bcs);
630 }
631 } else {
632 /* no B channel assigned: just deallocate */
633 spin_lock_irqsave(&cs->lock, flags);
634 list_del(&(*at_state_p)->list);
635 kfree(*at_state_p);
636 *at_state_p = NULL;
637 spin_unlock_irqrestore(&cs->lock, flags);
638 }
639 }
640
641 /* get_free_channel
642 * get a free AT state structure: either one of those associated with the
643 * B channels of the Gigaset device, or if none of those is available,
644 * a newly allocated one with bcs=NULL
645 * The structure should be freed by calling disconnect() after use.
646 */
647 static inline struct at_state_t *get_free_channel(struct cardstate *cs,
648 int cid)
649 /* cids: >0: siemens-cid
650 0: without cid
651 -1: no cid assigned yet
652 */
653 {
654 unsigned long flags;
655 int i;
656 struct at_state_t *ret;
657
658 for (i = 0; i < cs->channels; ++i)
659 if (gigaset_get_channel(cs->bcs + i)) {
660 ret = &cs->bcs[i].at_state;
661 ret->cid = cid;
662 return ret;
663 }
664
665 spin_lock_irqsave(&cs->lock, flags);
666 ret = kmalloc(sizeof(struct at_state_t), GFP_ATOMIC);
667 if (ret) {
668 gigaset_at_init(ret, NULL, cs, cid);
669 list_add(&ret->list, &cs->temp_at_states);
670 }
671 spin_unlock_irqrestore(&cs->lock, flags);
672 return ret;
673 }
674
675 static void init_failed(struct cardstate *cs, int mode)
676 {
677 int i;
678 struct at_state_t *at_state;
679
680 cs->at_state.pending_commands &= ~PC_INIT;
681 cs->mode = mode;
682 cs->mstate = MS_UNINITIALIZED;
683 gigaset_free_channels(cs);
684 for (i = 0; i < cs->channels; ++i) {
685 at_state = &cs->bcs[i].at_state;
686 if (at_state->pending_commands & PC_CID) {
687 at_state->pending_commands &= ~PC_CID;
688 at_state->pending_commands |= PC_NOCID;
689 cs->commands_pending = 1;
690 }
691 }
692 }
693
694 static void schedule_init(struct cardstate *cs, int state)
695 {
696 if (cs->at_state.pending_commands & PC_INIT) {
697 gig_dbg(DEBUG_EVENT, "not scheduling PC_INIT again");
698 return;
699 }
700 cs->mstate = state;
701 cs->mode = M_UNKNOWN;
702 gigaset_block_channels(cs);
703 cs->at_state.pending_commands |= PC_INIT;
704 gig_dbg(DEBUG_EVENT, "Scheduling PC_INIT");
705 cs->commands_pending = 1;
706 }
707
708 /* Add "AT" to a command, add the cid, dle encode it, send the result to the
709 hardware. */
710 static void send_command(struct cardstate *cs, const char *cmd, int cid,
711 int dle, gfp_t kmallocflags)
712 {
713 struct cmdbuf_t *cb;
714 size_t buflen;
715
716 buflen = strlen(cmd) + 12; /* DLE ( A T 1 2 3 4 5 <cmd> DLE ) \0 */
717 cb = kmalloc(sizeof(struct cmdbuf_t) + buflen, kmallocflags);
718 if (!cb) {
719 dev_err(cs->dev, "%s: out of memory\n", __func__);
720 return;
721 }
722 if (cid > 0 && cid <= 65535)
723 cb->len = snprintf(cb->buf, buflen,
724 dle ? "\020(AT%d%s\020)" : "AT%d%s",
725 cid, cmd);
726 else
727 cb->len = snprintf(cb->buf, buflen,
728 dle ? "\020(AT%s\020)" : "AT%s",
729 cmd);
730 cb->offset = 0;
731 cb->next = NULL;
732 cb->wake_tasklet = NULL;
733 cs->ops->write_cmd(cs, cb);
734 }
735
736 static struct at_state_t *at_state_from_cid(struct cardstate *cs, int cid)
737 {
738 struct at_state_t *at_state;
739 int i;
740 unsigned long flags;
741
742 if (cid == 0)
743 return &cs->at_state;
744
745 for (i = 0; i < cs->channels; ++i)
746 if (cid == cs->bcs[i].at_state.cid)
747 return &cs->bcs[i].at_state;
748
749 spin_lock_irqsave(&cs->lock, flags);
750
751 list_for_each_entry(at_state, &cs->temp_at_states, list)
752 if (cid == at_state->cid) {
753 spin_unlock_irqrestore(&cs->lock, flags);
754 return at_state;
755 }
756
757 spin_unlock_irqrestore(&cs->lock, flags);
758
759 return NULL;
760 }
761
762 static void bchannel_down(struct bc_state *bcs)
763 {
764 if (bcs->chstate & CHS_B_UP) {
765 bcs->chstate &= ~CHS_B_UP;
766 gigaset_isdn_hupB(bcs);
767 }
768
769 if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
770 bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
771 gigaset_isdn_hupD(bcs);
772 }
773
774 gigaset_free_channel(bcs);
775
776 gigaset_bcs_reinit(bcs);
777 }
778
779 static void bchannel_up(struct bc_state *bcs)
780 {
781 if (bcs->chstate & CHS_B_UP) {
782 dev_notice(bcs->cs->dev, "%s: B channel already up\n",
783 __func__);
784 return;
785 }
786
787 bcs->chstate |= CHS_B_UP;
788 gigaset_isdn_connB(bcs);
789 }
790
791 static void start_dial(struct at_state_t *at_state, void *data,
792 unsigned seq_index)
793 {
794 struct bc_state *bcs = at_state->bcs;
795 struct cardstate *cs = at_state->cs;
796 char **commands = data;
797 unsigned long flags;
798 int i;
799
800 bcs->chstate |= CHS_NOTIFY_LL;
801
802 spin_lock_irqsave(&cs->lock, flags);
803 if (at_state->seq_index != seq_index) {
804 spin_unlock_irqrestore(&cs->lock, flags);
805 goto error;
806 }
807 spin_unlock_irqrestore(&cs->lock, flags);
808
809 for (i = 0; i < AT_NUM; ++i) {
810 kfree(bcs->commands[i]);
811 bcs->commands[i] = commands[i];
812 }
813
814 at_state->pending_commands |= PC_CID;
815 gig_dbg(DEBUG_EVENT, "Scheduling PC_CID");
816 cs->commands_pending = 1;
817 return;
818
819 error:
820 for (i = 0; i < AT_NUM; ++i) {
821 kfree(commands[i]);
822 commands[i] = NULL;
823 }
824 at_state->pending_commands |= PC_NOCID;
825 gig_dbg(DEBUG_EVENT, "Scheduling PC_NOCID");
826 cs->commands_pending = 1;
827 return;
828 }
829
830 static void start_accept(struct at_state_t *at_state)
831 {
832 struct cardstate *cs = at_state->cs;
833 struct bc_state *bcs = at_state->bcs;
834 int i;
835
836 for (i = 0; i < AT_NUM; ++i) {
837 kfree(bcs->commands[i]);
838 bcs->commands[i] = NULL;
839 }
840
841 bcs->commands[AT_PROTO] = kmalloc(9, GFP_ATOMIC);
842 bcs->commands[AT_ISO] = kmalloc(9, GFP_ATOMIC);
843 if (!bcs->commands[AT_PROTO] || !bcs->commands[AT_ISO]) {
844 dev_err(at_state->cs->dev, "out of memory\n");
845 /* error reset */
846 at_state->pending_commands |= PC_HUP;
847 gig_dbg(DEBUG_EVENT, "Scheduling PC_HUP");
848 cs->commands_pending = 1;
849 return;
850 }
851
852 snprintf(bcs->commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
853 snprintf(bcs->commands[AT_ISO], 9, "^SISO=%u\r", bcs->channel + 1);
854
855 at_state->pending_commands |= PC_ACCEPT;
856 gig_dbg(DEBUG_EVENT, "Scheduling PC_ACCEPT");
857 cs->commands_pending = 1;
858 }
859
860 static void do_start(struct cardstate *cs)
861 {
862 gigaset_free_channels(cs);
863
864 if (cs->mstate != MS_LOCKED)
865 schedule_init(cs, MS_INIT);
866
867 cs->isdn_up = 1;
868 gigaset_isdn_start(cs);
869
870 cs->waiting = 0;
871 wake_up(&cs->waitqueue);
872 }
873
874 static void finish_shutdown(struct cardstate *cs)
875 {
876 if (cs->mstate != MS_LOCKED) {
877 cs->mstate = MS_UNINITIALIZED;
878 cs->mode = M_UNKNOWN;
879 }
880
881 /* Tell the LL that the device is not available .. */
882 if (cs->isdn_up) {
883 cs->isdn_up = 0;
884 gigaset_isdn_stop(cs);
885 }
886
887 /* The rest is done by cleanup_cs () in user mode. */
888
889 cs->cmd_result = -ENODEV;
890 cs->waiting = 0;
891 wake_up(&cs->waitqueue);
892 }
893
894 static void do_shutdown(struct cardstate *cs)
895 {
896 gigaset_block_channels(cs);
897
898 if (cs->mstate == MS_READY) {
899 cs->mstate = MS_SHUTDOWN;
900 cs->at_state.pending_commands |= PC_SHUTDOWN;
901 gig_dbg(DEBUG_EVENT, "Scheduling PC_SHUTDOWN");
902 cs->commands_pending = 1;
903 } else
904 finish_shutdown(cs);
905 }
906
907 static void do_stop(struct cardstate *cs)
908 {
909 unsigned long flags;
910
911 spin_lock_irqsave(&cs->lock, flags);
912 cs->connected = 0;
913 spin_unlock_irqrestore(&cs->lock, flags);
914
915 do_shutdown(cs);
916 }
917
918 /* Entering cid mode or getting a cid failed:
919 * try to initialize the device and try again.
920 *
921 * channel >= 0: getting cid for the channel failed
922 * channel < 0: entering cid mode failed
923 *
924 * returns 0 on failure
925 */
926 static int reinit_and_retry(struct cardstate *cs, int channel)
927 {
928 int i;
929
930 if (--cs->retry_count <= 0)
931 return 0;
932
933 for (i = 0; i < cs->channels; ++i)
934 if (cs->bcs[i].at_state.cid > 0)
935 return 0;
936
937 if (channel < 0)
938 dev_warn(cs->dev,
939 "Could not enter cid mode. Reinit device and try again.\n");
940 else {
941 dev_warn(cs->dev,
942 "Could not get a call id. Reinit device and try again.\n");
943 cs->bcs[channel].at_state.pending_commands |= PC_CID;
944 }
945 schedule_init(cs, MS_INIT);
946 return 1;
947 }
948
949 static int at_state_invalid(struct cardstate *cs,
950 struct at_state_t *test_ptr)
951 {
952 unsigned long flags;
953 unsigned channel;
954 struct at_state_t *at_state;
955 int retval = 0;
956
957 spin_lock_irqsave(&cs->lock, flags);
958
959 if (test_ptr == &cs->at_state)
960 goto exit;
961
962 list_for_each_entry(at_state, &cs->temp_at_states, list)
963 if (at_state == test_ptr)
964 goto exit;
965
966 for (channel = 0; channel < cs->channels; ++channel)
967 if (&cs->bcs[channel].at_state == test_ptr)
968 goto exit;
969
970 retval = 1;
971 exit:
972 spin_unlock_irqrestore(&cs->lock, flags);
973 return retval;
974 }
975
976 static void handle_icall(struct cardstate *cs, struct bc_state *bcs,
977 struct at_state_t **p_at_state)
978 {
979 int retval;
980 struct at_state_t *at_state = *p_at_state;
981
982 retval = gigaset_isdn_icall(at_state);
983 switch (retval) {
984 case ICALL_ACCEPT:
985 break;
986 default:
987 dev_err(cs->dev, "internal error: disposition=%d\n", retval);
988 /* --v-- fall through --v-- */
989 case ICALL_IGNORE:
990 case ICALL_REJECT:
991 /* hang up actively
992 * Device doc says that would reject the call.
993 * In fact it doesn't.
994 */
995 at_state->pending_commands |= PC_HUP;
996 cs->commands_pending = 1;
997 break;
998 }
999 }
1000
1001 static int do_lock(struct cardstate *cs)
1002 {
1003 int mode;
1004 int i;
1005
1006 switch (cs->mstate) {
1007 case MS_UNINITIALIZED:
1008 case MS_READY:
1009 if (cs->cur_at_seq || !list_empty(&cs->temp_at_states) ||
1010 cs->at_state.pending_commands)
1011 return -EBUSY;
1012
1013 for (i = 0; i < cs->channels; ++i)
1014 if (cs->bcs[i].at_state.pending_commands)
1015 return -EBUSY;
1016
1017 if (!gigaset_get_channels(cs))
1018 return -EBUSY;
1019
1020 break;
1021 case MS_LOCKED:
1022 break;
1023 default:
1024 return -EBUSY;
1025 }
1026
1027 mode = cs->mode;
1028 cs->mstate = MS_LOCKED;
1029 cs->mode = M_UNKNOWN;
1030
1031 return mode;
1032 }
1033
1034 static int do_unlock(struct cardstate *cs)
1035 {
1036 if (cs->mstate != MS_LOCKED)
1037 return -EINVAL;
1038
1039 cs->mstate = MS_UNINITIALIZED;
1040 cs->mode = M_UNKNOWN;
1041 gigaset_free_channels(cs);
1042 if (cs->connected)
1043 schedule_init(cs, MS_INIT);
1044
1045 return 0;
1046 }
1047
1048 static void do_action(int action, struct cardstate *cs,
1049 struct bc_state *bcs,
1050 struct at_state_t **p_at_state, char **pp_command,
1051 int *p_genresp, int *p_resp_code,
1052 struct event_t *ev)
1053 {
1054 struct at_state_t *at_state = *p_at_state;
1055 struct at_state_t *at_state2;
1056 unsigned long flags;
1057
1058 int channel;
1059
1060 unsigned char *s, *e;
1061 int i;
1062 unsigned long val;
1063
1064 switch (action) {
1065 case ACT_NOTHING:
1066 break;
1067 case ACT_TIMEOUT:
1068 at_state->waiting = 1;
1069 break;
1070 case ACT_INIT:
1071 cs->at_state.pending_commands &= ~PC_INIT;
1072 cs->cur_at_seq = SEQ_NONE;
1073 cs->mode = M_UNIMODEM;
1074 spin_lock_irqsave(&cs->lock, flags);
1075 if (!cs->cidmode) {
1076 spin_unlock_irqrestore(&cs->lock, flags);
1077 gigaset_free_channels(cs);
1078 cs->mstate = MS_READY;
1079 break;
1080 }
1081 spin_unlock_irqrestore(&cs->lock, flags);
1082 cs->at_state.pending_commands |= PC_CIDMODE;
1083 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1084 cs->commands_pending = 1;
1085 break;
1086 case ACT_FAILINIT:
1087 dev_warn(cs->dev, "Could not initialize the device.\n");
1088 cs->dle = 0;
1089 init_failed(cs, M_UNKNOWN);
1090 cs->cur_at_seq = SEQ_NONE;
1091 break;
1092 case ACT_CONFIGMODE:
1093 init_failed(cs, M_CONFIG);
1094 cs->cur_at_seq = SEQ_NONE;
1095 break;
1096 case ACT_SETDLE1:
1097 cs->dle = 1;
1098 /* cs->inbuf[0].inputstate |= INS_command | INS_DLE_command; */
1099 cs->inbuf[0].inputstate &=
1100 ~(INS_command | INS_DLE_command);
1101 break;
1102 case ACT_SETDLE0:
1103 cs->dle = 0;
1104 cs->inbuf[0].inputstate =
1105 (cs->inbuf[0].inputstate & ~INS_DLE_command)
1106 | INS_command;
1107 break;
1108 case ACT_CMODESET:
1109 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1110 gigaset_free_channels(cs);
1111 cs->mstate = MS_READY;
1112 }
1113 cs->mode = M_CID;
1114 cs->cur_at_seq = SEQ_NONE;
1115 break;
1116 case ACT_UMODESET:
1117 cs->mode = M_UNIMODEM;
1118 cs->cur_at_seq = SEQ_NONE;
1119 break;
1120 case ACT_FAILCMODE:
1121 cs->cur_at_seq = SEQ_NONE;
1122 if (cs->mstate == MS_INIT || cs->mstate == MS_RECOVER) {
1123 init_failed(cs, M_UNKNOWN);
1124 break;
1125 }
1126 if (!reinit_and_retry(cs, -1))
1127 schedule_init(cs, MS_RECOVER);
1128 break;
1129 case ACT_FAILUMODE:
1130 cs->cur_at_seq = SEQ_NONE;
1131 schedule_init(cs, MS_RECOVER);
1132 break;
1133 case ACT_HUPMODEM:
1134 /* send "+++" (hangup in unimodem mode) */
1135 if (cs->connected) {
1136 struct cmdbuf_t *cb;
1137
1138 cb = kmalloc(sizeof(struct cmdbuf_t) + 3, GFP_ATOMIC);
1139 if (!cb) {
1140 dev_err(cs->dev, "%s: out of memory\n",
1141 __func__);
1142 return;
1143 }
1144 memcpy(cb->buf, "+++", 3);
1145 cb->len = 3;
1146 cb->offset = 0;
1147 cb->next = NULL;
1148 cb->wake_tasklet = NULL;
1149 cs->ops->write_cmd(cs, cb);
1150 }
1151 break;
1152 case ACT_RING:
1153 /* get fresh AT state structure for new CID */
1154 at_state2 = get_free_channel(cs, ev->parameter);
1155 if (!at_state2) {
1156 dev_warn(cs->dev,
1157 "RING ignored: could not allocate channel structure\n");
1158 break;
1159 }
1160
1161 /* initialize AT state structure
1162 * note that bcs may be NULL if no B channel is free
1163 */
1164 at_state2->ConState = 700;
1165 for (i = 0; i < STR_NUM; ++i) {
1166 kfree(at_state2->str_var[i]);
1167 at_state2->str_var[i] = NULL;
1168 }
1169 at_state2->int_var[VAR_ZCTP] = -1;
1170
1171 spin_lock_irqsave(&cs->lock, flags);
1172 at_state2->timer_expires = RING_TIMEOUT;
1173 at_state2->timer_active = 1;
1174 spin_unlock_irqrestore(&cs->lock, flags);
1175 break;
1176 case ACT_ICALL:
1177 handle_icall(cs, bcs, p_at_state);
1178 break;
1179 case ACT_FAILSDOWN:
1180 dev_warn(cs->dev, "Could not shut down the device.\n");
1181 /* fall through */
1182 case ACT_FAKESDOWN:
1183 case ACT_SDOWN:
1184 cs->cur_at_seq = SEQ_NONE;
1185 finish_shutdown(cs);
1186 break;
1187 case ACT_CONNECT:
1188 if (cs->onechannel) {
1189 at_state->pending_commands |= PC_DLE1;
1190 cs->commands_pending = 1;
1191 break;
1192 }
1193 bcs->chstate |= CHS_D_UP;
1194 gigaset_isdn_connD(bcs);
1195 cs->ops->init_bchannel(bcs);
1196 break;
1197 case ACT_DLE1:
1198 cs->cur_at_seq = SEQ_NONE;
1199 bcs = cs->bcs + cs->curchannel;
1200
1201 bcs->chstate |= CHS_D_UP;
1202 gigaset_isdn_connD(bcs);
1203 cs->ops->init_bchannel(bcs);
1204 break;
1205 case ACT_FAKEHUP:
1206 at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
1207 /* fall through */
1208 case ACT_DISCONNECT:
1209 cs->cur_at_seq = SEQ_NONE;
1210 at_state->cid = -1;
1211 if (bcs && cs->onechannel && cs->dle) {
1212 /* Check for other open channels not needed:
1213 * DLE only used for M10x with one B channel.
1214 */
1215 at_state->pending_commands |= PC_DLE0;
1216 cs->commands_pending = 1;
1217 } else
1218 disconnect(p_at_state);
1219 break;
1220 case ACT_FAKEDLE0:
1221 at_state->int_var[VAR_ZDLE] = 0;
1222 cs->dle = 0;
1223 /* fall through */
1224 case ACT_DLE0:
1225 cs->cur_at_seq = SEQ_NONE;
1226 at_state2 = &cs->bcs[cs->curchannel].at_state;
1227 disconnect(&at_state2);
1228 break;
1229 case ACT_ABORTHUP:
1230 cs->cur_at_seq = SEQ_NONE;
1231 dev_warn(cs->dev, "Could not hang up.\n");
1232 at_state->cid = -1;
1233 if (bcs && cs->onechannel)
1234 at_state->pending_commands |= PC_DLE0;
1235 else
1236 disconnect(p_at_state);
1237 schedule_init(cs, MS_RECOVER);
1238 break;
1239 case ACT_FAILDLE0:
1240 cs->cur_at_seq = SEQ_NONE;
1241 dev_warn(cs->dev, "Could not leave DLE mode.\n");
1242 at_state2 = &cs->bcs[cs->curchannel].at_state;
1243 disconnect(&at_state2);
1244 schedule_init(cs, MS_RECOVER);
1245 break;
1246 case ACT_FAILDLE1:
1247 cs->cur_at_seq = SEQ_NONE;
1248 dev_warn(cs->dev,
1249 "Could not enter DLE mode. Trying to hang up.\n");
1250 channel = cs->curchannel;
1251 cs->bcs[channel].at_state.pending_commands |= PC_HUP;
1252 cs->commands_pending = 1;
1253 break;
1254
1255 case ACT_CID: /* got cid; start dialing */
1256 cs->cur_at_seq = SEQ_NONE;
1257 channel = cs->curchannel;
1258 if (ev->parameter > 0 && ev->parameter <= 65535) {
1259 cs->bcs[channel].at_state.cid = ev->parameter;
1260 cs->bcs[channel].at_state.pending_commands |=
1261 PC_DIAL;
1262 cs->commands_pending = 1;
1263 break;
1264 }
1265 /* fall through */
1266 case ACT_FAILCID:
1267 cs->cur_at_seq = SEQ_NONE;
1268 channel = cs->curchannel;
1269 if (!reinit_and_retry(cs, channel)) {
1270 dev_warn(cs->dev,
1271 "Could not get a call ID. Cannot dial.\n");
1272 at_state2 = &cs->bcs[channel].at_state;
1273 disconnect(&at_state2);
1274 }
1275 break;
1276 case ACT_ABORTCID:
1277 cs->cur_at_seq = SEQ_NONE;
1278 at_state2 = &cs->bcs[cs->curchannel].at_state;
1279 disconnect(&at_state2);
1280 break;
1281
1282 case ACT_DIALING:
1283 case ACT_ACCEPTED:
1284 cs->cur_at_seq = SEQ_NONE;
1285 break;
1286
1287 case ACT_ABORTACCEPT: /* hangup/error/timeout during ICALL procssng */
1288 disconnect(p_at_state);
1289 break;
1290
1291 case ACT_ABORTDIAL: /* error/timeout during dial preparation */
1292 cs->cur_at_seq = SEQ_NONE;
1293 at_state->pending_commands |= PC_HUP;
1294 cs->commands_pending = 1;
1295 break;
1296
1297 case ACT_REMOTEREJECT: /* DISCONNECT_IND after dialling */
1298 case ACT_CONNTIMEOUT: /* timeout waiting for ZSAU=ACTIVE */
1299 case ACT_REMOTEHUP: /* DISCONNECT_IND with established connection */
1300 at_state->pending_commands |= PC_HUP;
1301 cs->commands_pending = 1;
1302 break;
1303 case ACT_GETSTRING: /* warning: RING, ZDLE, ...
1304 are not handled properly anymore */
1305 at_state->getstring = 1;
1306 break;
1307 case ACT_SETVER:
1308 if (!ev->ptr) {
1309 *p_genresp = 1;
1310 *p_resp_code = RSP_ERROR;
1311 break;
1312 }
1313 s = ev->ptr;
1314
1315 if (!strcmp(s, "OK")) {
1316 *p_genresp = 1;
1317 *p_resp_code = RSP_ERROR;
1318 break;
1319 }
1320
1321 for (i = 0; i < 4; ++i) {
1322 val = simple_strtoul(s, (char **) &e, 10);
1323 if (val > INT_MAX || e == s)
1324 break;
1325 if (i == 3) {
1326 if (*e)
1327 break;
1328 } else if (*e != '.')
1329 break;
1330 else
1331 s = e + 1;
1332 cs->fwver[i] = val;
1333 }
1334 if (i != 4) {
1335 *p_genresp = 1;
1336 *p_resp_code = RSP_ERROR;
1337 break;
1338 }
1339 /*at_state->getstring = 1;*/
1340 cs->gotfwver = 0;
1341 break;
1342 case ACT_GOTVER:
1343 if (cs->gotfwver == 0) {
1344 cs->gotfwver = 1;
1345 gig_dbg(DEBUG_EVENT,
1346 "firmware version %02d.%03d.%02d.%02d",
1347 cs->fwver[0], cs->fwver[1],
1348 cs->fwver[2], cs->fwver[3]);
1349 break;
1350 }
1351 /* fall through */
1352 case ACT_FAILVER:
1353 cs->gotfwver = -1;
1354 dev_err(cs->dev, "could not read firmware version.\n");
1355 break;
1356 case ACT_ERROR:
1357 gig_dbg(DEBUG_ANY, "%s: ERROR response in ConState %d",
1358 __func__, at_state->ConState);
1359 cs->cur_at_seq = SEQ_NONE;
1360 break;
1361 case ACT_DEBUG:
1362 gig_dbg(DEBUG_ANY, "%s: resp_code %d in ConState %d",
1363 __func__, ev->type, at_state->ConState);
1364 break;
1365 case ACT_WARN:
1366 dev_warn(cs->dev, "%s: resp_code %d in ConState %d!\n",
1367 __func__, ev->type, at_state->ConState);
1368 break;
1369 case ACT_ZCAU:
1370 dev_warn(cs->dev, "cause code %04x in connection state %d.\n",
1371 ev->parameter, at_state->ConState);
1372 break;
1373
1374 /* events from the LL */
1375 case ACT_DIAL:
1376 start_dial(at_state, ev->ptr, ev->parameter);
1377 break;
1378 case ACT_ACCEPT:
1379 start_accept(at_state);
1380 break;
1381 case ACT_HUP:
1382 at_state->pending_commands |= PC_HUP;
1383 gig_dbg(DEBUG_EVENT, "Scheduling PC_HUP");
1384 cs->commands_pending = 1;
1385 break;
1386
1387 /* hotplug events */
1388 case ACT_STOP:
1389 do_stop(cs);
1390 break;
1391 case ACT_START:
1392 do_start(cs);
1393 break;
1394
1395 /* events from the interface */
1396 case ACT_IF_LOCK:
1397 cs->cmd_result = ev->parameter ? do_lock(cs) : do_unlock(cs);
1398 cs->waiting = 0;
1399 wake_up(&cs->waitqueue);
1400 break;
1401 case ACT_IF_VER:
1402 if (ev->parameter != 0)
1403 cs->cmd_result = -EINVAL;
1404 else if (cs->gotfwver != 1) {
1405 cs->cmd_result = -ENOENT;
1406 } else {
1407 memcpy(ev->arg, cs->fwver, sizeof cs->fwver);
1408 cs->cmd_result = 0;
1409 }
1410 cs->waiting = 0;
1411 wake_up(&cs->waitqueue);
1412 break;
1413
1414 /* events from the proc file system */
1415 case ACT_PROC_CIDMODE:
1416 spin_lock_irqsave(&cs->lock, flags);
1417 if (ev->parameter != cs->cidmode) {
1418 cs->cidmode = ev->parameter;
1419 if (ev->parameter) {
1420 cs->at_state.pending_commands |= PC_CIDMODE;
1421 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1422 } else {
1423 cs->at_state.pending_commands |= PC_UMMODE;
1424 gig_dbg(DEBUG_EVENT, "Scheduling PC_UMMODE");
1425 }
1426 cs->commands_pending = 1;
1427 }
1428 spin_unlock_irqrestore(&cs->lock, flags);
1429 cs->waiting = 0;
1430 wake_up(&cs->waitqueue);
1431 break;
1432
1433 /* events from the hardware drivers */
1434 case ACT_NOTIFY_BC_DOWN:
1435 bchannel_down(bcs);
1436 break;
1437 case ACT_NOTIFY_BC_UP:
1438 bchannel_up(bcs);
1439 break;
1440 case ACT_SHUTDOWN:
1441 do_shutdown(cs);
1442 break;
1443
1444
1445 default:
1446 if (action >= ACT_CMD && action < ACT_CMD + AT_NUM) {
1447 *pp_command = at_state->bcs->commands[action - ACT_CMD];
1448 if (!*pp_command) {
1449 *p_genresp = 1;
1450 *p_resp_code = RSP_NULL;
1451 }
1452 } else
1453 dev_err(cs->dev, "%s: action==%d!\n", __func__, action);
1454 }
1455 }
1456
1457 /* State machine to do the calling and hangup procedure */
1458 static void process_event(struct cardstate *cs, struct event_t *ev)
1459 {
1460 struct bc_state *bcs;
1461 char *p_command = NULL;
1462 struct reply_t *rep;
1463 int rcode;
1464 int genresp = 0;
1465 int resp_code = RSP_ERROR;
1466 int sendcid;
1467 struct at_state_t *at_state;
1468 int index;
1469 int curact;
1470 unsigned long flags;
1471
1472 if (ev->cid >= 0) {
1473 at_state = at_state_from_cid(cs, ev->cid);
1474 if (!at_state) {
1475 gig_dbg(DEBUG_EVENT, "event %d for invalid cid %d",
1476 ev->type, ev->cid);
1477 gigaset_add_event(cs, &cs->at_state, RSP_WRONG_CID,
1478 NULL, 0, NULL);
1479 return;
1480 }
1481 } else {
1482 at_state = ev->at_state;
1483 if (at_state_invalid(cs, at_state)) {
1484 gig_dbg(DEBUG_EVENT, "event for invalid at_state %p",
1485 at_state);
1486 return;
1487 }
1488 }
1489
1490 gig_dbg(DEBUG_EVENT, "connection state %d, event %d",
1491 at_state->ConState, ev->type);
1492
1493 bcs = at_state->bcs;
1494 sendcid = at_state->cid;
1495
1496 /* Setting the pointer to the dial array */
1497 rep = at_state->replystruct;
1498
1499 spin_lock_irqsave(&cs->lock, flags);
1500 if (ev->type == EV_TIMEOUT) {
1501 if (ev->parameter != at_state->timer_index
1502 || !at_state->timer_active) {
1503 ev->type = RSP_NONE; /* old timeout */
1504 gig_dbg(DEBUG_EVENT, "old timeout");
1505 } else if (!at_state->waiting)
1506 gig_dbg(DEBUG_EVENT, "timeout occurred");
1507 else
1508 gig_dbg(DEBUG_EVENT, "stopped waiting");
1509 }
1510 spin_unlock_irqrestore(&cs->lock, flags);
1511
1512 /* if the response belongs to a variable in at_state->int_var[VAR_XXXX]
1513 or at_state->str_var[STR_XXXX], set it */
1514 if (ev->type >= RSP_VAR && ev->type < RSP_VAR + VAR_NUM) {
1515 index = ev->type - RSP_VAR;
1516 at_state->int_var[index] = ev->parameter;
1517 } else if (ev->type >= RSP_STR && ev->type < RSP_STR + STR_NUM) {
1518 index = ev->type - RSP_STR;
1519 kfree(at_state->str_var[index]);
1520 at_state->str_var[index] = ev->ptr;
1521 ev->ptr = NULL; /* prevent process_events() from
1522 deallocating ptr */
1523 }
1524
1525 if (ev->type == EV_TIMEOUT || ev->type == RSP_STRING)
1526 at_state->getstring = 0;
1527
1528 /* Search row in dial array which matches modem response and current
1529 constate */
1530 for (;; rep++) {
1531 rcode = rep->resp_code;
1532 if (rcode == RSP_LAST) {
1533 /* found nothing...*/
1534 dev_warn(cs->dev, "%s: rcode=RSP_LAST: "
1535 "resp_code %d in ConState %d!\n",
1536 __func__, ev->type, at_state->ConState);
1537 return;
1538 }
1539 if ((rcode == RSP_ANY || rcode == ev->type)
1540 && ((int) at_state->ConState >= rep->min_ConState)
1541 && (rep->max_ConState < 0
1542 || (int) at_state->ConState <= rep->max_ConState)
1543 && (rep->parameter < 0 || rep->parameter == ev->parameter))
1544 break;
1545 }
1546
1547 p_command = rep->command;
1548
1549 at_state->waiting = 0;
1550 for (curact = 0; curact < MAXACT; ++curact) {
1551 /* The row tells us what we should do ..
1552 */
1553 do_action(rep->action[curact], cs, bcs, &at_state, &p_command,
1554 &genresp, &resp_code, ev);
1555 if (!at_state)
1556 break; /* may be freed after disconnect */
1557 }
1558
1559 if (at_state) {
1560 /* Jump to the next con-state regarding the array */
1561 if (rep->new_ConState >= 0)
1562 at_state->ConState = rep->new_ConState;
1563
1564 if (genresp) {
1565 spin_lock_irqsave(&cs->lock, flags);
1566 at_state->timer_expires = 0;
1567 at_state->timer_active = 0;
1568 spin_unlock_irqrestore(&cs->lock, flags);
1569 gigaset_add_event(cs, at_state, resp_code,
1570 NULL, 0, NULL);
1571 } else {
1572 /* Send command to modem if not NULL... */
1573 if (p_command) {
1574 if (cs->connected)
1575 send_command(cs, p_command,
1576 sendcid, cs->dle,
1577 GFP_ATOMIC);
1578 else
1579 gigaset_add_event(cs, at_state,
1580 RSP_NODEV,
1581 NULL, 0, NULL);
1582 }
1583
1584 spin_lock_irqsave(&cs->lock, flags);
1585 if (!rep->timeout) {
1586 at_state->timer_expires = 0;
1587 at_state->timer_active = 0;
1588 } else if (rep->timeout > 0) { /* new timeout */
1589 at_state->timer_expires = rep->timeout * 10;
1590 at_state->timer_active = 1;
1591 ++at_state->timer_index;
1592 }
1593 spin_unlock_irqrestore(&cs->lock, flags);
1594 }
1595 }
1596 }
1597
1598 static void schedule_sequence(struct cardstate *cs,
1599 struct at_state_t *at_state, int sequence)
1600 {
1601 cs->cur_at_seq = sequence;
1602 gigaset_add_event(cs, at_state, RSP_INIT, NULL, sequence, NULL);
1603 }
1604
1605 static void process_command_flags(struct cardstate *cs)
1606 {
1607 struct at_state_t *at_state = NULL;
1608 struct bc_state *bcs;
1609 int i;
1610 int sequence;
1611 unsigned long flags;
1612
1613 cs->commands_pending = 0;
1614
1615 if (cs->cur_at_seq) {
1616 gig_dbg(DEBUG_EVENT, "not searching scheduled commands: busy");
1617 return;
1618 }
1619
1620 gig_dbg(DEBUG_EVENT, "searching scheduled commands");
1621
1622 sequence = SEQ_NONE;
1623
1624 /* clear pending_commands and hangup channels on shutdown */
1625 if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1626 cs->at_state.pending_commands &= ~PC_CIDMODE;
1627 for (i = 0; i < cs->channels; ++i) {
1628 bcs = cs->bcs + i;
1629 at_state = &bcs->at_state;
1630 at_state->pending_commands &=
1631 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1632 if (at_state->cid > 0)
1633 at_state->pending_commands |= PC_HUP;
1634 if (at_state->pending_commands & PC_CID) {
1635 at_state->pending_commands |= PC_NOCID;
1636 at_state->pending_commands &= ~PC_CID;
1637 }
1638 }
1639 }
1640
1641 /* clear pending_commands and hangup channels on reset */
1642 if (cs->at_state.pending_commands & PC_INIT) {
1643 cs->at_state.pending_commands &= ~PC_CIDMODE;
1644 for (i = 0; i < cs->channels; ++i) {
1645 bcs = cs->bcs + i;
1646 at_state = &bcs->at_state;
1647 at_state->pending_commands &=
1648 ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
1649 if (at_state->cid > 0)
1650 at_state->pending_commands |= PC_HUP;
1651 if (cs->mstate == MS_RECOVER) {
1652 if (at_state->pending_commands & PC_CID) {
1653 at_state->pending_commands |= PC_NOCID;
1654 at_state->pending_commands &= ~PC_CID;
1655 }
1656 }
1657 }
1658 }
1659
1660 /* only switch back to unimodem mode if no commands are pending and
1661 * no channels are up */
1662 spin_lock_irqsave(&cs->lock, flags);
1663 if (cs->at_state.pending_commands == PC_UMMODE
1664 && !cs->cidmode
1665 && list_empty(&cs->temp_at_states)
1666 && cs->mode == M_CID) {
1667 sequence = SEQ_UMMODE;
1668 at_state = &cs->at_state;
1669 for (i = 0; i < cs->channels; ++i) {
1670 bcs = cs->bcs + i;
1671 if (bcs->at_state.pending_commands ||
1672 bcs->at_state.cid > 0) {
1673 sequence = SEQ_NONE;
1674 break;
1675 }
1676 }
1677 }
1678 spin_unlock_irqrestore(&cs->lock, flags);
1679 cs->at_state.pending_commands &= ~PC_UMMODE;
1680 if (sequence != SEQ_NONE) {
1681 schedule_sequence(cs, at_state, sequence);
1682 return;
1683 }
1684
1685 for (i = 0; i < cs->channels; ++i) {
1686 bcs = cs->bcs + i;
1687 if (bcs->at_state.pending_commands & PC_HUP) {
1688 bcs->at_state.pending_commands &= ~PC_HUP;
1689 if (bcs->at_state.pending_commands & PC_CID) {
1690 /* not yet dialing: PC_NOCID is sufficient */
1691 bcs->at_state.pending_commands |= PC_NOCID;
1692 bcs->at_state.pending_commands &= ~PC_CID;
1693 } else {
1694 schedule_sequence(cs, &bcs->at_state, SEQ_HUP);
1695 return;
1696 }
1697 }
1698 if (bcs->at_state.pending_commands & PC_NOCID) {
1699 bcs->at_state.pending_commands &= ~PC_NOCID;
1700 cs->curchannel = bcs->channel;
1701 schedule_sequence(cs, &cs->at_state, SEQ_NOCID);
1702 return;
1703 } else if (bcs->at_state.pending_commands & PC_DLE0) {
1704 bcs->at_state.pending_commands &= ~PC_DLE0;
1705 cs->curchannel = bcs->channel;
1706 schedule_sequence(cs, &cs->at_state, SEQ_DLE0);
1707 return;
1708 }
1709 }
1710
1711 list_for_each_entry(at_state, &cs->temp_at_states, list)
1712 if (at_state->pending_commands & PC_HUP) {
1713 at_state->pending_commands &= ~PC_HUP;
1714 schedule_sequence(cs, at_state, SEQ_HUP);
1715 return;
1716 }
1717
1718 if (cs->at_state.pending_commands & PC_INIT) {
1719 cs->at_state.pending_commands &= ~PC_INIT;
1720 cs->dle = 0;
1721 cs->inbuf->inputstate = INS_command;
1722 schedule_sequence(cs, &cs->at_state, SEQ_INIT);
1723 return;
1724 }
1725 if (cs->at_state.pending_commands & PC_SHUTDOWN) {
1726 cs->at_state.pending_commands &= ~PC_SHUTDOWN;
1727 schedule_sequence(cs, &cs->at_state, SEQ_SHUTDOWN);
1728 return;
1729 }
1730 if (cs->at_state.pending_commands & PC_CIDMODE) {
1731 cs->at_state.pending_commands &= ~PC_CIDMODE;
1732 if (cs->mode == M_UNIMODEM) {
1733 cs->retry_count = 1;
1734 schedule_sequence(cs, &cs->at_state, SEQ_CIDMODE);
1735 return;
1736 }
1737 }
1738
1739 for (i = 0; i < cs->channels; ++i) {
1740 bcs = cs->bcs + i;
1741 if (bcs->at_state.pending_commands & PC_DLE1) {
1742 bcs->at_state.pending_commands &= ~PC_DLE1;
1743 cs->curchannel = bcs->channel;
1744 schedule_sequence(cs, &cs->at_state, SEQ_DLE1);
1745 return;
1746 }
1747 if (bcs->at_state.pending_commands & PC_ACCEPT) {
1748 bcs->at_state.pending_commands &= ~PC_ACCEPT;
1749 schedule_sequence(cs, &bcs->at_state, SEQ_ACCEPT);
1750 return;
1751 }
1752 if (bcs->at_state.pending_commands & PC_DIAL) {
1753 bcs->at_state.pending_commands &= ~PC_DIAL;
1754 schedule_sequence(cs, &bcs->at_state, SEQ_DIAL);
1755 return;
1756 }
1757 if (bcs->at_state.pending_commands & PC_CID) {
1758 switch (cs->mode) {
1759 case M_UNIMODEM:
1760 cs->at_state.pending_commands |= PC_CIDMODE;
1761 gig_dbg(DEBUG_EVENT, "Scheduling PC_CIDMODE");
1762 cs->commands_pending = 1;
1763 return;
1764 case M_UNKNOWN:
1765 schedule_init(cs, MS_INIT);
1766 return;
1767 }
1768 bcs->at_state.pending_commands &= ~PC_CID;
1769 cs->curchannel = bcs->channel;
1770 cs->retry_count = 2;
1771 schedule_sequence(cs, &cs->at_state, SEQ_CID);
1772 return;
1773 }
1774 }
1775 }
1776
1777 static void process_events(struct cardstate *cs)
1778 {
1779 struct event_t *ev;
1780 unsigned head, tail;
1781 int i;
1782 int check_flags = 0;
1783 int was_busy;
1784 unsigned long flags;
1785
1786 spin_lock_irqsave(&cs->ev_lock, flags);
1787 head = cs->ev_head;
1788
1789 for (i = 0; i < 2 * MAX_EVENTS; ++i) {
1790 tail = cs->ev_tail;
1791 if (tail == head) {
1792 if (!check_flags && !cs->commands_pending)
1793 break;
1794 check_flags = 0;
1795 spin_unlock_irqrestore(&cs->ev_lock, flags);
1796 process_command_flags(cs);
1797 spin_lock_irqsave(&cs->ev_lock, flags);
1798 tail = cs->ev_tail;
1799 if (tail == head) {
1800 if (!cs->commands_pending)
1801 break;
1802 continue;
1803 }
1804 }
1805
1806 ev = cs->events + head;
1807 was_busy = cs->cur_at_seq != SEQ_NONE;
1808 spin_unlock_irqrestore(&cs->ev_lock, flags);
1809 process_event(cs, ev);
1810 spin_lock_irqsave(&cs->ev_lock, flags);
1811 kfree(ev->ptr);
1812 ev->ptr = NULL;
1813 if (was_busy && cs->cur_at_seq == SEQ_NONE)
1814 check_flags = 1;
1815
1816 head = (head + 1) % MAX_EVENTS;
1817 cs->ev_head = head;
1818 }
1819
1820 spin_unlock_irqrestore(&cs->ev_lock, flags);
1821
1822 if (i == 2 * MAX_EVENTS) {
1823 dev_err(cs->dev,
1824 "infinite loop in process_events; aborting.\n");
1825 }
1826 }
1827
1828 /* tasklet scheduled on any event received from the Gigaset device
1829 * parameter:
1830 * data ISDN controller state structure
1831 */
1832 void gigaset_handle_event(unsigned long data)
1833 {
1834 struct cardstate *cs = (struct cardstate *) data;
1835
1836 /* handle incoming data on control/common channel */
1837 if (cs->inbuf->head != cs->inbuf->tail) {
1838 gig_dbg(DEBUG_INTR, "processing new data");
1839 cs->ops->handle_input(cs->inbuf);
1840 }
1841
1842 process_events(cs);
1843 }
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