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[deliverable/linux.git] / drivers / isdn / gigaset / i4l.c
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3c66a225
HL		 1/*
2 * Stuff used by all variants of the driver
3 *
4 * Copyright (c) 2001 by Stefan Eilers (Eilers.Stefan@epost.de),
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 * ToDo: ...
15 * =====================================================================
16 * Version: $Id: i4l.c,v 1.3.2.9 2006/02/04 18:28:16 hjlipp Exp $
17 * =====================================================================
18 */
19
20#include "gigaset.h"
21
22/* == Handling of I4L IO ============================================================================*/
23
24/* writebuf_from_LL
25 * called by LL to transmit data on an open channel
26 * inserts the buffer data into the send queue and starts the transmission
27 * Note that this operation must not sleep!
28 * When the buffer is processed completely, gigaset_skb_sent() should be called.
29 * parameters:
30 * driverID driver ID as assigned by LL
31 * channel channel number
32 * ack if != 0 LL wants to be notified on completion via statcallb(ISDN_STAT_BSENT)
33 * skb skb containing data to send
34 * return value:
35 * number of accepted bytes
36 * 0 if temporarily unable to accept data (out of buffer space)
37 * <0 on error (eg. -EINVAL)
38 */
39static int writebuf_from_LL(int driverID, int channel, int ack, struct sk_buff *skb)
40{
41 struct cardstate *cs;
42 struct bc_state *bcs;
43 unsigned len;
44 unsigned skblen;
45
46 if (!(cs = gigaset_get_cs_by_id(driverID))) {
47 err("%s: invalid driver ID (%d)", __func__, driverID);
48 return -ENODEV;
49 }
50 if (channel < 0 || channel >= cs->channels) {
51 err("%s: invalid channel ID (%d)", __func__, channel);
52 return -ENODEV;
53 }
54 bcs = &cs->bcs[channel];
55 len = skb->len;
56
57 dbg(DEBUG_LLDATA,
58 "Receiving data from LL (id: %d, channel: %d, ack: %d, size: %d)",
59 driverID, channel, ack, len);
60
61 if (!len) {
62 if (ack)
63 warn("not ACKing empty packet from LL");
64 return 0;
65 }
66 if (len > MAX_BUF_SIZE) {
67 err("%s: packet too large (%d bytes)", __func__, channel);
68 return -EINVAL;
69 }
70
71 if (!atomic_read(&cs->connected))
72 return -ENODEV;
73
74 skblen = ack ? len : 0;
75 skb->head[0] = skblen & 0xff;
76 skb->head[1] = skblen >> 8;
77 dbg(DEBUG_MCMD, "skb: len=%u, skblen=%u: %02x %02x", len, skblen,
78 (unsigned) skb->head[0], (unsigned) skb->head[1]);
79
80 /* pass to device-specific module */
81 return cs->ops->send_skb(bcs, skb);
82}
83
84void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb)
85{
86 unsigned len;
87 isdn_ctrl response;
88
89 ++bcs->trans_up;
90
91 if (skb->len)
92 warn("%s: skb->len==%d", __func__, skb->len);
93
94 len = (unsigned char) skb->head[0] |
95 (unsigned) (unsigned char) skb->head[1] << 8;
96 if (len) {
97 dbg(DEBUG_MCMD,
98 "Acknowledge sending to LL (id: %d, channel: %d size: %u)",
99 bcs->cs->myid, bcs->channel, len);
100
101 response.driver = bcs->cs->myid;
102 response.command = ISDN_STAT_BSENT;
103 response.arg = bcs->channel;
104 response.parm.length = len;
105 bcs->cs->iif.statcallb(&response);
106 }
107}
108EXPORT_SYMBOL_GPL(gigaset_skb_sent);
109
110/* This function will be called by LL to send commands
111 * NOTE: LL ignores the returned value, for commands other than ISDN_CMD_IOCTL,
112 * so don't put too much effort into it.
113 */
114static int command_from_LL(isdn_ctrl *cntrl)
115{
116 struct cardstate *cs = gigaset_get_cs_by_id(cntrl->driver);
117 //isdn_ctrl response;
118 //unsigned long flags;
119 struct bc_state *bcs;
120 int retval = 0;
121 struct setup_parm *sp;
122
123 //dbg(DEBUG_ANY, "Gigaset_HW: Receiving command");
124 gigaset_debugdrivers();
125
126 /* Terminate this call if no device is present. Bt if the command is "ISDN_CMD_LOCK" or
127 * "ISDN_CMD_UNLOCK" then execute it due to the fact that they are device independent !
128 */
129 //FIXME "remove test for &connected"
130 if ((!cs || !atomic_read(&cs->connected))) {
131 warn("LL tried to access unknown device with nr. %d",
132 cntrl->driver);
133 return -ENODEV;
134 }
135
136 switch (cntrl->command) {
137 case ISDN_CMD_IOCTL:
138
139 dbg(DEBUG_ANY, "ISDN_CMD_IOCTL (driver:%d,arg: %ld)",
140 cntrl->driver, cntrl->arg);
141
142 warn("ISDN_CMD_IOCTL is not supported.");
143 return -EINVAL;
144
145 case ISDN_CMD_DIAL:
146 dbg(DEBUG_ANY, "ISDN_CMD_DIAL (driver: %d, channel: %ld, "
147 "phone: %s,ownmsn: %s, si1: %d, si2: %d)",
148 cntrl->driver, cntrl->arg,
149 cntrl->parm.setup.phone, cntrl->parm.setup.eazmsn,
150 cntrl->parm.setup.si1, cntrl->parm.setup.si2);
151
152 if (cntrl->arg >= cs->channels) {
153 err("invalid channel (%d)", (int) cntrl->arg);
154 return -EINVAL;
155 }
156
157 bcs = cs->bcs + cntrl->arg;
158
159 if (!gigaset_get_channel(bcs)) {
160 err("channel not free");
161 return -EBUSY;
162 }
163
164 sp = kmalloc(sizeof *sp, GFP_ATOMIC);
165 if (!sp) {
166 gigaset_free_channel(bcs);
167 err("ISDN_CMD_DIAL: out of memory");
168 return -ENOMEM;
169 }
170 *sp = cntrl->parm.setup;
171
172 if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, sp,
173 atomic_read(&bcs->at_state.seq_index),
174 NULL)) {
175 //FIXME what should we do?
176 kfree(sp);
177 gigaset_free_channel(bcs);
178 return -ENOMEM;
179 }
180
181 dbg(DEBUG_CMD, "scheduling DIAL");
182 gigaset_schedule_event(cs);
183 break;
184 case ISDN_CMD_ACCEPTD: //FIXME
185 dbg(DEBUG_ANY, "ISDN_CMD_ACCEPTD");
186
187 if (cntrl->arg >= cs->channels) {
188 err("invalid channel (%d)", (int) cntrl->arg);
189 return -EINVAL;
190 }
191
192 if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg].at_state,
193 EV_ACCEPT, NULL, 0, NULL)) {
194 //FIXME what should we do?
195 return -ENOMEM;
196 }
197
198 dbg(DEBUG_CMD, "scheduling ACCEPT");
199 gigaset_schedule_event(cs);
200
201 break;
202 case ISDN_CMD_ACCEPTB:
203 dbg(DEBUG_ANY, "ISDN_CMD_ACCEPTB");
204 break;
205 case ISDN_CMD_HANGUP:
206 dbg(DEBUG_ANY,
207 "ISDN_CMD_HANGUP (channel: %d)", (int) cntrl->arg);
208
209 if (cntrl->arg >= cs->channels) {
210 err("ISDN_CMD_HANGUP: invalid channel (%u)",
211 (unsigned) cntrl->arg);
212 return -EINVAL;
213 }
214
215 if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg].at_state,
216 EV_HUP, NULL, 0, NULL)) {
217 //FIXME what should we do?
218 return -ENOMEM;
219 }
220
221 dbg(DEBUG_CMD, "scheduling HUP");
222 gigaset_schedule_event(cs);
223
224 break;
225 case ISDN_CMD_CLREAZ: /* Do not signal incoming signals */ //FIXME
226 dbg(DEBUG_ANY, "ISDN_CMD_CLREAZ");
227 break;
228 case ISDN_CMD_SETEAZ: /* Signal incoming calls for given MSN */ //FIXME
229 dbg(DEBUG_ANY,
230 "ISDN_CMD_SETEAZ (id:%d, channel: %ld, number: %s)",
231 cntrl->driver, cntrl->arg, cntrl->parm.num);
232 break;
233 case ISDN_CMD_SETL2: /* Set L2 to given protocol */
234 dbg(DEBUG_ANY, "ISDN_CMD_SETL2 (Channel: %ld, Proto: %lx)",
235 cntrl->arg & 0xff, (cntrl->arg >> 8));
236
237 if ((cntrl->arg & 0xff) >= cs->channels) {
238 err("invalid channel (%u)",
239 (unsigned) cntrl->arg & 0xff);
240 return -EINVAL;
241 }
242
243 if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg & 0xff].at_state,
244 EV_PROTO_L2, NULL, cntrl->arg >> 8,
245 NULL)) {
246 //FIXME what should we do?
247 return -ENOMEM;
248 }
249
250 dbg(DEBUG_CMD, "scheduling PROTO_L2");
251 gigaset_schedule_event(cs);
252 break;
253 case ISDN_CMD_SETL3: /* Set L3 to given protocol */
254 dbg(DEBUG_ANY, "ISDN_CMD_SETL3 (Channel: %ld, Proto: %lx)",
255 cntrl->arg & 0xff, (cntrl->arg >> 8));
256
257 if ((cntrl->arg & 0xff) >= cs->channels) {
258 err("invalid channel (%u)",
259 (unsigned) cntrl->arg & 0xff);
260 return -EINVAL;
261 }
262
263 if (cntrl->arg >> 8 != ISDN_PROTO_L3_TRANS) {
264 err("invalid protocol %lu", cntrl->arg >> 8);
265 return -EINVAL;
266 }
267
268 break;
269 case ISDN_CMD_PROCEED:
270 dbg(DEBUG_ANY, "ISDN_CMD_PROCEED"); //FIXME
271 break;
272 case ISDN_CMD_ALERT:
273 dbg(DEBUG_ANY, "ISDN_CMD_ALERT"); //FIXME
274 if (cntrl->arg >= cs->channels) {
275 err("invalid channel (%d)", (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 dbg(DEBUG_ANY, "ISDN_CMD_REDIR"); //FIXME
284 break;
285 case ISDN_CMD_PROT_IO:
286 dbg(DEBUG_ANY, "ISDN_CMD_PROT_IO");
287 break;
288 case ISDN_CMD_FAXCMD:
289 dbg(DEBUG_ANY, "ISDN_CMD_FAXCMD");
290 break;
291 case ISDN_CMD_GETL2:
292 dbg(DEBUG_ANY, "ISDN_CMD_GETL2");
293 break;
294 case ISDN_CMD_GETL3:
295 dbg(DEBUG_ANY, "ISDN_CMD_GETL3");
296 break;
297 case ISDN_CMD_GETEAZ:
298 dbg(DEBUG_ANY, "ISDN_CMD_GETEAZ");
299 break;
300 case ISDN_CMD_SETSIL:
301 dbg(DEBUG_ANY, "ISDN_CMD_SETSIL");
302 break;
303 case ISDN_CMD_GETSIL:
304 dbg(DEBUG_ANY, "ISDN_CMD_GETSIL");
305 break;
306 default:
307 err("unknown command %d from LL",
308 cntrl->command);
309 return -EINVAL;
310 }
311
312 return retval;
313}
314
315void 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
325void 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
335int 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 err("invalid protocol: %u", bcs->proto2);
354 return -EINVAL;
355 }
356
357 switch (sp->si1) {
358 case 1: /* audio */
359 bc = "9090A3"; /* 3.1 kHz audio, A-law */
360 break;
361 case 7: /* data */
362 default: /* hope the app knows what it is doing */
363 bc = "8890"; /* unrestricted digital information */
364 }
365 //FIXME add missing si1 values from 1TR6, inspect si2, set HLC/LLC
366
367 length[AT_DIAL ] = 1 + strlen(sp->phone) + 1 + 1;
368 l = strlen(sp->eazmsn);
369 length[AT_MSN ] = l ? 6 + l + 1 + 1 : 0;
370 length[AT_BC ] = 5 + strlen(bc) + 1 + 1;
371 length[AT_PROTO] = 6 + 1 + 1 + 1; /* proto: 1 character */
372 length[AT_ISO ] = 6 + 1 + 1 + 1; /* channel: 1 character */
373 length[AT_TYPE ] = 6 + 1 + 1 + 1; /* call type: 1 character */
374 length[AT_HLC ] = 0;
375
376 for (i = 0; i < AT_NUM; ++i) {
377 kfree(bcs->commands[i]);
378 bcs->commands[i] = NULL;
379 if (length[i] &&
380 !(bcs->commands[i] = kmalloc(length[i], GFP_ATOMIC))) {
381 err("out of memory");
382 return -ENOMEM;
383 }
384 }
385
386 /* type = 1: extern, 0: intern, 2: recall, 3: door, 4: centrex */
387 if (sp->phone[0] == '*' && sp->phone[1] == '*') {
388 /* internal call: translate ** prefix to CTP value */
389 snprintf(bcs->commands[AT_DIAL], length[AT_DIAL],
390 "D%s\r", sp->phone+2);
391 strncpy(bcs->commands[AT_TYPE], "^SCTP=0\r", length[AT_TYPE]);
392 } else {
393 snprintf(bcs->commands[AT_DIAL], length[AT_DIAL],
394 "D%s\r", sp->phone);
395 strncpy(bcs->commands[AT_TYPE], "^SCTP=1\r", length[AT_TYPE]);
396 }
397
398 if (bcs->commands[AT_MSN])
399 snprintf(bcs->commands[AT_MSN], length[AT_MSN], "^SMSN=%s\r", sp->eazmsn);
400 snprintf(bcs->commands[AT_BC ], length[AT_BC ], "^SBC=%s\r", bc);
401 snprintf(bcs->commands[AT_PROTO], length[AT_PROTO], "^SBPR=%u\r", proto);
402 snprintf(bcs->commands[AT_ISO ], length[AT_ISO ], "^SISO=%u\r", (unsigned)bcs->channel + 1);
403
404 return 0;
405}
406
407int gigaset_isdn_setup_accept(struct at_state_t *at_state)
408{
409 unsigned proto;
410 size_t length[AT_NUM];
411 int i;
412 struct bc_state *bcs = at_state->bcs;
413
414 switch (bcs->proto2) {
415 case ISDN_PROTO_L2_HDLC:
416 proto = 1; /* 0: Bitsynchron, 1: HDLC, 2: voice */
417 break;
418 case ISDN_PROTO_L2_TRANS:
419 proto = 2; /* 0: Bitsynchron, 1: HDLC, 2: voice */
420 break;
421 default:
422 err("invalid protocol: %u", bcs->proto2);
423 return -EINVAL;
424 }
425
426 length[AT_DIAL ] = 0;
427 length[AT_MSN ] = 0;
428 length[AT_BC ] = 0;
429 length[AT_PROTO] = 6 + 1 + 1 + 1; /* proto: 1 character */
430 length[AT_ISO ] = 6 + 1 + 1 + 1; /* channel: 1 character */
431 length[AT_TYPE ] = 0;
432 length[AT_HLC ] = 0;
433
434 for (i = 0; i < AT_NUM; ++i) {
435 kfree(bcs->commands[i]);
436 bcs->commands[i] = NULL;
437 if (length[i] &&
438 !(bcs->commands[i] = kmalloc(length[i], GFP_ATOMIC))) {
439 err("out of memory");
440 return -ENOMEM;
441 }
442 }
443
444 snprintf(bcs->commands[AT_PROTO], length[AT_PROTO], "^SBPR=%u\r", proto);
445 snprintf(bcs->commands[AT_ISO ], length[AT_ISO ], "^SISO=%u\r", (unsigned) bcs->channel + 1);
446
447 return 0;
448}
449
450int gigaset_isdn_icall(struct at_state_t *at_state)
451{
452 struct cardstate *cs = at_state->cs;
453 struct bc_state *bcs = at_state->bcs;
454 isdn_ctrl response;
455 int retval;
456
457 /* fill ICALL structure */
458 response.parm.setup.si1 = 0; /* default: unknown */
459 response.parm.setup.si2 = 0;
460 response.parm.setup.screen = 0; //FIXME how to set these?
461 response.parm.setup.plan = 0;
462 if (!at_state->str_var[STR_ZBC]) {
463 /* no BC (internal call): assume speech, A-law */
464 response.parm.setup.si1 = 1;
465 } else if (!strcmp(at_state->str_var[STR_ZBC], "8890")) {
466 /* unrestricted digital information */
467 response.parm.setup.si1 = 7;
468 } else if (!strcmp(at_state->str_var[STR_ZBC], "8090A3")) {
469 /* speech, A-law */
470 response.parm.setup.si1 = 1;
471 } else if (!strcmp(at_state->str_var[STR_ZBC], "9090A3")) {
472 /* 3,1 kHz audio, A-law */
473 response.parm.setup.si1 = 1;
474 response.parm.setup.si2 = 2;
475 } else {
476 warn("RING ignored - unsupported BC %s",
477 at_state->str_var[STR_ZBC]);
478 return ICALL_IGNORE;
479 }
480 if (at_state->str_var[STR_NMBR]) {
481 strncpy(response.parm.setup.phone, at_state->str_var[STR_NMBR],
482 sizeof response.parm.setup.phone - 1);
483 response.parm.setup.phone[sizeof response.parm.setup.phone - 1] = 0;
484 } else
485 response.parm.setup.phone[0] = 0;
486 if (at_state->str_var[STR_ZCPN]) {
487 strncpy(response.parm.setup.eazmsn, at_state->str_var[STR_ZCPN],
488 sizeof response.parm.setup.eazmsn - 1);
489 response.parm.setup.eazmsn[sizeof response.parm.setup.eazmsn - 1] = 0;
490 } else
491 response.parm.setup.eazmsn[0] = 0;
492
493 if (!bcs) {
494 notice("no channel for incoming call");
495 dbg(DEBUG_CMD, "Sending ICALLW");
496 response.command = ISDN_STAT_ICALLW;
497 response.arg = 0; //FIXME
498 } else {
499 dbg(DEBUG_CMD, "Sending ICALL");
500 response.command = ISDN_STAT_ICALL;
501 response.arg = bcs->channel; //FIXME
502 }
503 response.driver = cs->myid;
504 retval = cs->iif.statcallb(&response);
505 dbg(DEBUG_CMD, "Response: %d", retval);
506 switch (retval) {
507 case 0: /* no takers */
508 return ICALL_IGNORE;
509 case 1: /* alerting */
510 bcs->chstate |= CHS_NOTIFY_LL;
511 return ICALL_ACCEPT;
512 case 2: /* reject */
513 return ICALL_REJECT;
514 case 3: /* incomplete */
515 warn("LL requested unsupported feature: Incomplete Number");
516 return ICALL_IGNORE;
517 case 4: /* proceeding */
518 /* Gigaset will send ALERTING anyway.
519 * There doesn't seem to be a way to avoid this.
520 */
521 return ICALL_ACCEPT;
522 case 5: /* deflect */
523 warn("LL requested unsupported feature: Call Deflection");
524 return ICALL_IGNORE;
525 default:
526 err("LL error %d on ICALL", retval);
527 return ICALL_IGNORE;
528 }
529}
530
531/* Set Callback function pointer */
532int gigaset_register_to_LL(struct cardstate *cs, const char *isdnid)
533{
534 isdn_if *iif = &cs->iif;
535
536 dbg(DEBUG_ANY, "Register driver capabilities to LL");
537
538 //iif->id[sizeof(iif->id) - 1]=0;
539 //strncpy(iif->id, isdnid, sizeof(iif->id) - 1);
540 if (snprintf(iif->id, sizeof iif->id, "%s_%u", isdnid, cs->minor_index)
541 >= sizeof iif->id)
542 return -ENOMEM; //FIXME EINVAL/...??
543
544 iif->owner = THIS_MODULE;
545 iif->channels = cs->channels; /* I am supporting just one channel *//* I was supporting...*/
546 iif->maxbufsize = MAX_BUF_SIZE;
547 iif->features = ISDN_FEATURE_L2_TRANS | /* Our device is very advanced, therefore */
548 ISDN_FEATURE_L2_HDLC |
549#ifdef GIG_X75
550 ISDN_FEATURE_L2_X75I |
551#endif
552 ISDN_FEATURE_L3_TRANS |
553 ISDN_FEATURE_P_EURO;
554 iif->hl_hdrlen = HW_HDR_LEN; /* Area for storing ack */
555 iif->command = command_from_LL;
556 iif->writebuf_skb = writebuf_from_LL;
557 iif->writecmd = NULL; /* Don't support isdnctrl */
558 iif->readstat = NULL; /* Don't support isdnctrl */
559 iif->rcvcallb_skb = NULL; /* Will be set by LL */
560 iif->statcallb = NULL; /* Will be set by LL */
561
562 if (!register_isdn(iif))
563 return 0;
564
565 cs->myid = iif->channels; /* Set my device id */
566 return 1;
567}
Linux kernel - Deliverables
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