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ath5k: fix values for bus error bits in ISR2
[linux-2.6/next.git] / drivers / isdn / gigaset / i4l.c
blob9b22f9cf2f33b2bd4895bf15f5d3cb16e73918df
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 /* == Handling of I4L IO =====================================================*/
19
20 /* writebuf_from_LL
21 * called by LL to transmit data on an open channel
22 * inserts the buffer data into the send queue and starts the transmission
23 * Note that this operation must not sleep!
24 * When the buffer is processed completely, gigaset_skb_sent() should be called.
25 * parameters:
26 * driverID driver ID as assigned by LL
27 * channel channel number
28 * ack if != 0 LL wants to be notified on completion via
29 * statcallb(ISDN_STAT_BSENT)
30 * skb skb containing data to send
31 * return value:
32 * number of accepted bytes
33 * 0 if temporarily unable to accept data (out of buffer space)
34 * <0 on error (eg. -EINVAL)
35 */
36 static int writebuf_from_LL(int driverID, int channel, int ack,
37 struct sk_buff *skb)
38 {
39 struct cardstate *cs;
40 struct bc_state *bcs;
41 unsigned len;
42 unsigned skblen;
43
44 if (!(cs = gigaset_get_cs_by_id(driverID))) {
45 pr_err("%s: invalid driver ID (%d)\n", __func__, driverID);
46 return -ENODEV;
47 }
48 if (channel < 0 || channel >= cs->channels) {
49 dev_err(cs->dev, "%s: invalid channel ID (%d)\n",
50 __func__, channel);
51 return -ENODEV;
52 }
53 bcs = &cs->bcs[channel];
54 len = skb->len;
55
56 gig_dbg(DEBUG_LLDATA,
57 "Receiving data from LL (id: %d, ch: %d, ack: %d, sz: %d)",
58 driverID, channel, ack, len);
59
60 if (!len) {
61 if (ack)
62 dev_notice(cs->dev, "%s: not ACKing empty packet\n",
63 __func__);
64 return 0;
65 }
66 if (len > MAX_BUF_SIZE) {
67 dev_err(cs->dev, "%s: packet too large (%d bytes)\n",
68 __func__, len);
69 return -EINVAL;
70 }
71
72 skblen = ack ? len : 0;
73 skb->head[0] = skblen & 0xff;
74 skb->head[1] = skblen >> 8;
75 gig_dbg(DEBUG_MCMD, "skb: len=%u, skblen=%u: %02x %02x",
76 len, skblen, (unsigned) skb->head[0], (unsigned) skb->head[1]);
77
78 /* pass to device-specific module */
79 return cs->ops->send_skb(bcs, skb);
80 }
81
82 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb)
83 {
84 unsigned len;
85 isdn_ctrl response;
86
87 ++bcs->trans_up;
88
89 if (skb->len)
90 dev_warn(bcs->cs->dev, "%s: skb->len==%d\n",
91 __func__, skb->len);
92
93 len = (unsigned char) skb->head[0] |
94 (unsigned) (unsigned char) skb->head[1] << 8;
95 if (len) {
96 gig_dbg(DEBUG_MCMD, "ACKing to LL (id: %d, ch: %d, sz: %u)",
97 bcs->cs->myid, bcs->channel, len);
98
99 response.driver = bcs->cs->myid;
100 response.command = ISDN_STAT_BSENT;
101 response.arg = bcs->channel;
102 response.parm.length = len;
103 bcs->cs->iif.statcallb(&response);
104 }
105 }
106 EXPORT_SYMBOL_GPL(gigaset_skb_sent);
107
108 /* This function will be called by LL to send commands
109 * NOTE: LL ignores the returned value, for commands other than ISDN_CMD_IOCTL,
110 * so don't put too much effort into it.
111 */
112 static int command_from_LL(isdn_ctrl *cntrl)
113 {
114 struct cardstate *cs = gigaset_get_cs_by_id(cntrl->driver);
115 struct bc_state *bcs;
116 int retval = 0;
117 struct setup_parm *sp;
118
119 gigaset_debugdrivers();
120
121 if (!cs) {
122 pr_err("%s: invalid driver ID (%d)\n", __func__, cntrl->driver);
123 return -ENODEV;
124 }
125
126 switch (cntrl->command) {
127 case ISDN_CMD_IOCTL:
128 gig_dbg(DEBUG_ANY, "ISDN_CMD_IOCTL (driver: %d, arg: %ld)",
129 cntrl->driver, cntrl->arg);
130
131 dev_warn(cs->dev, "ISDN_CMD_IOCTL not supported\n");
132 return -EINVAL;
133
134 case ISDN_CMD_DIAL:
135 gig_dbg(DEBUG_ANY,
136 "ISDN_CMD_DIAL (driver: %d, ch: %ld, "
137 "phone: %s, ownmsn: %s, si1: %d, si2: %d)",
138 cntrl->driver, cntrl->arg,
139 cntrl->parm.setup.phone, cntrl->parm.setup.eazmsn,
140 cntrl->parm.setup.si1, cntrl->parm.setup.si2);
141
142 if (cntrl->arg >= cs->channels) {
143 dev_err(cs->dev,
144 "ISDN_CMD_DIAL: invalid channel (%d)\n",
145 (int) cntrl->arg);
146 return -EINVAL;
147 }
148
149 bcs = cs->bcs + cntrl->arg;
150
151 if (!gigaset_get_channel(bcs)) {
152 dev_err(cs->dev, "ISDN_CMD_DIAL: channel not free\n");
153 return -EBUSY;
154 }
155
156 sp = kmalloc(sizeof *sp, GFP_ATOMIC);
157 if (!sp) {
158 gigaset_free_channel(bcs);
159 dev_err(cs->dev, "ISDN_CMD_DIAL: out of memory\n");
160 return -ENOMEM;
161 }
162 *sp = cntrl->parm.setup;
163
164 if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, sp,
165 bcs->at_state.seq_index, NULL)) {
166 //FIXME what should we do?
167 kfree(sp);
168 gigaset_free_channel(bcs);
169 return -ENOMEM;
170 }
171
172 gig_dbg(DEBUG_CMD, "scheduling DIAL");
173 gigaset_schedule_event(cs);
174 break;
175 case ISDN_CMD_ACCEPTD: //FIXME
176 gig_dbg(DEBUG_ANY, "ISDN_CMD_ACCEPTD");
177
178 if (cntrl->arg >= cs->channels) {
179 dev_err(cs->dev,
180 "ISDN_CMD_ACCEPTD: invalid channel (%d)\n",
181 (int) cntrl->arg);
182 return -EINVAL;
183 }
184
185 if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg].at_state,
186 EV_ACCEPT, NULL, 0, NULL)) {
187 //FIXME what should we do?
188 return -ENOMEM;
189 }
190
191 gig_dbg(DEBUG_CMD, "scheduling ACCEPT");
192 gigaset_schedule_event(cs);
193
194 break;
195 case ISDN_CMD_ACCEPTB:
196 gig_dbg(DEBUG_ANY, "ISDN_CMD_ACCEPTB");
197 break;
198 case ISDN_CMD_HANGUP:
199 gig_dbg(DEBUG_ANY, "ISDN_CMD_HANGUP (ch: %d)",
200 (int) cntrl->arg);
201
202 if (cntrl->arg >= cs->channels) {
203 dev_err(cs->dev,
204 "ISDN_CMD_HANGUP: invalid channel (%d)\n",
205 (int) cntrl->arg);
206 return -EINVAL;
207 }
208
209 if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg].at_state,
210 EV_HUP, NULL, 0, NULL)) {
211 //FIXME what should we do?
212 return -ENOMEM;
213 }
214
215 gig_dbg(DEBUG_CMD, "scheduling HUP");
216 gigaset_schedule_event(cs);
217
218 break;
219 case ISDN_CMD_CLREAZ: /* Do not signal incoming signals */ //FIXME
220 gig_dbg(DEBUG_ANY, "ISDN_CMD_CLREAZ");
221 break;
222 case ISDN_CMD_SETEAZ: /* Signal incoming calls for given MSN */ //FIXME
223 gig_dbg(DEBUG_ANY,
224 "ISDN_CMD_SETEAZ (id: %d, ch: %ld, number: %s)",
225 cntrl->driver, cntrl->arg, cntrl->parm.num);
226 break;
227 case ISDN_CMD_SETL2: /* Set L2 to given protocol */
228 gig_dbg(DEBUG_ANY, "ISDN_CMD_SETL2 (ch: %ld, proto: %lx)",
229 cntrl->arg & 0xff, (cntrl->arg >> 8));
230
231 if ((cntrl->arg & 0xff) >= cs->channels) {
232 dev_err(cs->dev,
233 "ISDN_CMD_SETL2: invalid channel (%d)\n",
234 (int) cntrl->arg & 0xff);
235 return -EINVAL;
236 }
237
238 if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg & 0xff].at_state,
239 EV_PROTO_L2, NULL, cntrl->arg >> 8,
240 NULL)) {
241 //FIXME what should we do?
242 return -ENOMEM;
243 }
244
245 gig_dbg(DEBUG_CMD, "scheduling PROTO_L2");
246 gigaset_schedule_event(cs);
247 break;
248 case ISDN_CMD_SETL3: /* Set L3 to given protocol */
249 gig_dbg(DEBUG_ANY, "ISDN_CMD_SETL3 (ch: %ld, proto: %lx)",
250 cntrl->arg & 0xff, (cntrl->arg >> 8));
251
252 if ((cntrl->arg & 0xff) >= cs->channels) {
253 dev_err(cs->dev,
254 "ISDN_CMD_SETL3: invalid channel (%d)\n",
255 (int) cntrl->arg & 0xff);
256 return -EINVAL;
257 }
258
259 if (cntrl->arg >> 8 != ISDN_PROTO_L3_TRANS) {
260 dev_err(cs->dev,
261 "ISDN_CMD_SETL3: invalid protocol %lu\n",
262 cntrl->arg >> 8);
263 return -EINVAL;
264 }
265
266 break;
267 case ISDN_CMD_PROCEED:
268 gig_dbg(DEBUG_ANY, "ISDN_CMD_PROCEED"); //FIXME
269 break;
270 case ISDN_CMD_ALERT:
271 gig_dbg(DEBUG_ANY, "ISDN_CMD_ALERT"); //FIXME
272 if (cntrl->arg >= cs->channels) {
273 dev_err(cs->dev,
274 "ISDN_CMD_ALERT: invalid channel (%d)\n",
275 (int) cntrl->arg);
276 return -EINVAL;
277 }
278 //bcs = cs->bcs + cntrl->arg;
279 //bcs->proto2 = -1;
280 // FIXME
281 break;
282 case ISDN_CMD_REDIR:
283 gig_dbg(DEBUG_ANY, "ISDN_CMD_REDIR"); //FIXME
284 break;
285 case ISDN_CMD_PROT_IO:
286 gig_dbg(DEBUG_ANY, "ISDN_CMD_PROT_IO");
287 break;
288 case ISDN_CMD_FAXCMD:
289 gig_dbg(DEBUG_ANY, "ISDN_CMD_FAXCMD");
290 break;
291 case ISDN_CMD_GETL2:
292 gig_dbg(DEBUG_ANY, "ISDN_CMD_GETL2");
293 break;
294 case ISDN_CMD_GETL3:
295 gig_dbg(DEBUG_ANY, "ISDN_CMD_GETL3");
296 break;
297 case ISDN_CMD_GETEAZ:
298 gig_dbg(DEBUG_ANY, "ISDN_CMD_GETEAZ");
299 break;
300 case ISDN_CMD_SETSIL:
301 gig_dbg(DEBUG_ANY, "ISDN_CMD_SETSIL");
302 break;
303 case ISDN_CMD_GETSIL:
304 gig_dbg(DEBUG_ANY, "ISDN_CMD_GETSIL");
305 break;
306 default:
307 dev_err(cs->dev, "unknown command %d from LL\n",
308 cntrl->command);
309 return -EINVAL;
310 }
311
312 return retval;
313 }
314
315 void gigaset_i4l_cmd(struct cardstate *cs, int cmd)
316 {
317 isdn_ctrl command;
318
319 command.driver = cs->myid;
320 command.command = cmd;
321 command.arg = 0;
322 cs->iif.statcallb(&command);
323 }
324
325 void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd)
326 {
327 isdn_ctrl command;
328
329 command.driver = bcs->cs->myid;
330 command.command = cmd;
331 command.arg = bcs->channel;
332 bcs->cs->iif.statcallb(&command);
333 }
334
335 int gigaset_isdn_setup_dial(struct at_state_t *at_state, void *data)
336 {
337 struct bc_state *bcs = at_state->bcs;
338 unsigned proto;
339 const char *bc;
340 size_t length[AT_NUM];
341 size_t l;
342 int i;
343 struct setup_parm *sp = data;
344
345 switch (bcs->proto2) {
346 case ISDN_PROTO_L2_HDLC:
347 proto = 1; /* 0: Bitsynchron, 1: HDLC, 2: voice */
348 break;
349 case ISDN_PROTO_L2_TRANS:
350 proto = 2; /* 0: Bitsynchron, 1: HDLC, 2: voice */
351 break;
352 default:
353 dev_err(bcs->cs->dev, "%s: invalid L2 protocol: %u\n",
354 __func__, bcs->proto2);
355 return -EINVAL;
356 }
357
358 switch (sp->si1) {
359 case 1: /* audio */
360 bc = "9090A3"; /* 3.1 kHz audio, A-law */
361 break;
362 case 7: /* data */
363 default: /* hope the app knows what it is doing */
364 bc = "8890"; /* unrestricted digital information */
365 }
366 //FIXME add missing si1 values from 1TR6, inspect si2, set HLC/LLC
367
368 length[AT_DIAL ] = 1 + strlen(sp->phone) + 1 + 1;
369 l = strlen(sp->eazmsn);
370 length[AT_MSN ] = l ? 6 + l + 1 + 1 : 0;
371 length[AT_BC ] = 5 + strlen(bc) + 1 + 1;
372 length[AT_PROTO] = 6 + 1 + 1 + 1; /* proto: 1 character */
373 length[AT_ISO ] = 6 + 1 + 1 + 1; /* channel: 1 character */
374 length[AT_TYPE ] = 6 + 1 + 1 + 1; /* call type: 1 character */
375 length[AT_HLC ] = 0;
376
377 for (i = 0; i < AT_NUM; ++i) {
378 kfree(bcs->commands[i]);
379 bcs->commands[i] = NULL;
380 if (length[i] &&
381 !(bcs->commands[i] = kmalloc(length[i], GFP_ATOMIC))) {
382 dev_err(bcs->cs->dev, "out of memory\n");
383 return -ENOMEM;
384 }
385 }
386
387 /* type = 1: extern, 0: intern, 2: recall, 3: door, 4: centrex */
388 if (sp->phone[0] == '*' && sp->phone[1] == '*') {
389 /* internal call: translate ** prefix to CTP value */
390 snprintf(bcs->commands[AT_DIAL], length[AT_DIAL],
391 "D%s\r", sp->phone+2);
392 strncpy(bcs->commands[AT_TYPE], "^SCTP=0\r", length[AT_TYPE]);
393 } else {
394 snprintf(bcs->commands[AT_DIAL], length[AT_DIAL],
395 "D%s\r", sp->phone);
396 strncpy(bcs->commands[AT_TYPE], "^SCTP=1\r", length[AT_TYPE]);
397 }
398
399 if (bcs->commands[AT_MSN])
400 snprintf(bcs->commands[AT_MSN], length[AT_MSN],
401 "^SMSN=%s\r", sp->eazmsn);
402 snprintf(bcs->commands[AT_BC ], length[AT_BC ],
403 "^SBC=%s\r", bc);
404 snprintf(bcs->commands[AT_PROTO], length[AT_PROTO],
405 "^SBPR=%u\r", proto);
406 snprintf(bcs->commands[AT_ISO ], length[AT_ISO ],
407 "^SISO=%u\r", (unsigned)bcs->channel + 1);
408
409 return 0;
410 }
411
412 int gigaset_isdn_setup_accept(struct at_state_t *at_state)
413 {
414 unsigned proto;
415 size_t length[AT_NUM];
416 int i;
417 struct bc_state *bcs = at_state->bcs;
418
419 switch (bcs->proto2) {
420 case ISDN_PROTO_L2_HDLC:
421 proto = 1; /* 0: Bitsynchron, 1: HDLC, 2: voice */
422 break;
423 case ISDN_PROTO_L2_TRANS:
424 proto = 2; /* 0: Bitsynchron, 1: HDLC, 2: voice */
425 break;
426 default:
427 dev_err(at_state->cs->dev, "%s: invalid protocol: %u\n",
428 __func__, bcs->proto2);
429 return -EINVAL;
430 }
431
432 length[AT_DIAL ] = 0;
433 length[AT_MSN ] = 0;
434 length[AT_BC ] = 0;
435 length[AT_PROTO] = 6 + 1 + 1 + 1; /* proto: 1 character */
436 length[AT_ISO ] = 6 + 1 + 1 + 1; /* channel: 1 character */
437 length[AT_TYPE ] = 0;
438 length[AT_HLC ] = 0;
439
440 for (i = 0; i < AT_NUM; ++i) {
441 kfree(bcs->commands[i]);
442 bcs->commands[i] = NULL;
443 if (length[i] &&
444 !(bcs->commands[i] = kmalloc(length[i], GFP_ATOMIC))) {
445 dev_err(at_state->cs->dev, "out of memory\n");
446 return -ENOMEM;
447 }
448 }
449
450 snprintf(bcs->commands[AT_PROTO], length[AT_PROTO],
451 "^SBPR=%u\r", proto);
452 snprintf(bcs->commands[AT_ISO ], length[AT_ISO ],
453 "^SISO=%u\r", (unsigned) bcs->channel + 1);
454
455 return 0;
456 }
457
458 int gigaset_isdn_icall(struct at_state_t *at_state)
459 {
460 struct cardstate *cs = at_state->cs;
461 struct bc_state *bcs = at_state->bcs;
462 isdn_ctrl response;
463 int retval;
464
465 /* fill ICALL structure */
466 response.parm.setup.si1 = 0; /* default: unknown */
467 response.parm.setup.si2 = 0;
468 response.parm.setup.screen = 0; //FIXME how to set these?
469 response.parm.setup.plan = 0;
470 if (!at_state->str_var[STR_ZBC]) {
471 /* no BC (internal call): assume speech, A-law */
472 response.parm.setup.si1 = 1;
473 } else if (!strcmp(at_state->str_var[STR_ZBC], "8890")) {
474 /* unrestricted digital information */
475 response.parm.setup.si1 = 7;
476 } else if (!strcmp(at_state->str_var[STR_ZBC], "8090A3")) {
477 /* speech, A-law */
478 response.parm.setup.si1 = 1;
479 } else if (!strcmp(at_state->str_var[STR_ZBC], "9090A3")) {
480 /* 3,1 kHz audio, A-law */
481 response.parm.setup.si1 = 1;
482 response.parm.setup.si2 = 2;
483 } else {
484 dev_warn(cs->dev, "RING ignored - unsupported BC %s\n",
485 at_state->str_var[STR_ZBC]);
486 return ICALL_IGNORE;
487 }
488 if (at_state->str_var[STR_NMBR]) {
489 strncpy(response.parm.setup.phone, at_state->str_var[STR_NMBR],
490 sizeof response.parm.setup.phone - 1);
491 response.parm.setup.phone[sizeof response.parm.setup.phone - 1] = 0;
492 } else
493 response.parm.setup.phone[0] = 0;
494 if (at_state->str_var[STR_ZCPN]) {
495 strncpy(response.parm.setup.eazmsn, at_state->str_var[STR_ZCPN],
496 sizeof response.parm.setup.eazmsn - 1);
497 response.parm.setup.eazmsn[sizeof response.parm.setup.eazmsn - 1] = 0;
498 } else
499 response.parm.setup.eazmsn[0] = 0;
500
501 if (!bcs) {
502 dev_notice(cs->dev, "no channel for incoming call\n");
503 response.command = ISDN_STAT_ICALLW;
504 response.arg = 0; //FIXME
505 } else {
506 gig_dbg(DEBUG_CMD, "Sending ICALL");
507 response.command = ISDN_STAT_ICALL;
508 response.arg = bcs->channel; //FIXME
509 }
510 response.driver = cs->myid;
511 retval = cs->iif.statcallb(&response);
512 gig_dbg(DEBUG_CMD, "Response: %d", retval);
513 switch (retval) {
514 case 0: /* no takers */
515 return ICALL_IGNORE;
516 case 1: /* alerting */
517 bcs->chstate |= CHS_NOTIFY_LL;
518 return ICALL_ACCEPT;
519 case 2: /* reject */
520 return ICALL_REJECT;
521 case 3: /* incomplete */
522 dev_warn(cs->dev,
523 "LL requested unsupported feature: Incomplete Number\n");
524 return ICALL_IGNORE;
525 case 4: /* proceeding */
526 /* Gigaset will send ALERTING anyway.
527 * There doesn't seem to be a way to avoid this.
528 */
529 return ICALL_ACCEPT;
530 case 5: /* deflect */
531 dev_warn(cs->dev,
532 "LL requested unsupported feature: Call Deflection\n");
533 return ICALL_IGNORE;
534 default:
535 dev_err(cs->dev, "LL error %d on ICALL\n", retval);
536 return ICALL_IGNORE;
537 }
538 }
539
540 /* Set Callback function pointer */
541 int gigaset_register_to_LL(struct cardstate *cs, const char *isdnid)
542 {
543 isdn_if *iif = &cs->iif;
544
545 gig_dbg(DEBUG_ANY, "Register driver capabilities to LL");
546
547 if (snprintf(iif->id, sizeof iif->id, "%s_%u", isdnid, cs->minor_index)
548 >= sizeof iif->id) {
549 pr_err("ID too long: %s\n", isdnid);
550 return 0;
551 }
552
553 iif->owner = THIS_MODULE;
554 iif->channels = cs->channels;
555 iif->maxbufsize = MAX_BUF_SIZE;
556 iif->features = ISDN_FEATURE_L2_TRANS |
557 ISDN_FEATURE_L2_HDLC |
558 #ifdef GIG_X75
559 ISDN_FEATURE_L2_X75I |
560 #endif
561 ISDN_FEATURE_L3_TRANS |
562 ISDN_FEATURE_P_EURO;
563 iif->hl_hdrlen = HW_HDR_LEN; /* Area for storing ack */
564 iif->command = command_from_LL;
565 iif->writebuf_skb = writebuf_from_LL;
566 iif->writecmd = NULL; /* Don't support isdnctrl */
567 iif->readstat = NULL; /* Don't support isdnctrl */
568 iif->rcvcallb_skb = NULL; /* Will be set by LL */
569 iif->statcallb = NULL; /* Will be set by LL */
570
571 if (!register_isdn(iif)) {
572 pr_err("register_isdn failed\n");
573 return 0;
574 }
575
576 cs->myid = iif->channels; /* Set my device id */
577 return 1;
578 }
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