gigaset: use pr_err() and pr_info()
[linux-2.6.git] / drivers / isdn / gigaset / i4l.c
1 /*
2  * Stuff used by all variants of the driver
3  *
4  * Copyright (c) 2001 by Stefan Eilers,
5  *                       Hansjoerg Lipp <hjlipp@web.de>,
6  *                       Tilman Schmidt <tilman@imap.cc>.
7  *
8  * =====================================================================
9  *      This program is free software; you can redistribute it and/or
10  *      modify it under the terms of the GNU General Public License as
11  *      published by the Free Software Foundation; either version 2 of
12  *      the License, or (at your option) any later version.
13  * =====================================================================
14  */
15
16 #include "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         //iif->id[sizeof(iif->id) - 1]=0;
548         //strncpy(iif->id, isdnid, sizeof(iif->id) - 1);
549         if (snprintf(iif->id, sizeof iif->id, "%s_%u", isdnid, cs->minor_index)
550             >= sizeof iif->id)
551                 return -ENOMEM; //FIXME EINVAL/...??
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                 return 0;
573
574         cs->myid = iif->channels;               /* Set my device id */
575         return 1;
576 }