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TTY: switch tty_flip_buffer_push
[deliverable/linux.git] / drivers / isdn / i4l / isdn_tty.c
1 /*
2 * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel).
3 *
4 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
5 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
6 *
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
9 *
10 */
11 #undef ISDN_TTY_STAT_DEBUG
12
13 #include <linux/isdn.h>
14 #include <linux/serial.h> /* ASYNC_* flags */
15 #include <linux/slab.h>
16 #include <linux/delay.h>
17 #include <linux/mutex.h>
18 #include "isdn_common.h"
19 #include "isdn_tty.h"
20 #ifdef CONFIG_ISDN_AUDIO
21 #include "isdn_audio.h"
22 #define VBUF 0x3e0
23 #define VBUFX (VBUF/16)
24 #endif
25
26 #define FIX_FILE_TRANSFER
27 #define DUMMY_HAYES_AT
28
29 /* Prototypes */
30
31 static DEFINE_MUTEX(modem_info_mutex);
32 static int isdn_tty_edit_at(const char *, int, modem_info *);
33 static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
34 static void isdn_tty_modem_reset_regs(modem_info *, int);
35 static void isdn_tty_cmd_ATA(modem_info *);
36 static void isdn_tty_flush_buffer(struct tty_struct *);
37 static void isdn_tty_modem_result(int, modem_info *);
38 #ifdef CONFIG_ISDN_AUDIO
39 static int isdn_tty_countDLE(unsigned char *, int);
40 #endif
41
42 /* Leave this unchanged unless you know what you do! */
43 #define MODEM_PARANOIA_CHECK
44 #define MODEM_DO_RESTART
45
46 static int bit2si[8] =
47 {1, 5, 7, 7, 7, 7, 7, 7};
48 static int si2bit[8] =
49 {4, 1, 4, 4, 4, 4, 4, 4};
50
51 /* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
52 * to stuff incoming data directly into a tty's flip-buffer. This
53 * is done to speed up tty-receiving if the receive-queue is empty.
54 * This routine MUST be called with interrupts off.
55 * Return:
56 * 1 = Success
57 * 0 = Failure, data has to be buffered and later processed by
58 * isdn_tty_readmodem().
59 */
60 static int
61 isdn_tty_try_read(modem_info *info, struct sk_buff *skb)
62 {
63 struct tty_port *port = &info->port;
64 int c;
65 int len;
66 char last;
67
68 if (!info->online)
69 return 0;
70
71 if (!(info->mcr & UART_MCR_RTS))
72 return 0;
73
74 len = skb->len
75 #ifdef CONFIG_ISDN_AUDIO
76 + ISDN_AUDIO_SKB_DLECOUNT(skb)
77 #endif
78 ;
79
80 c = tty_buffer_request_room(port, len);
81 if (c < len)
82 return 0;
83
84 #ifdef CONFIG_ISDN_AUDIO
85 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
86 int l = skb->len;
87 unsigned char *dp = skb->data;
88 while (--l) {
89 if (*dp == DLE)
90 tty_insert_flip_char(port, DLE, 0);
91 tty_insert_flip_char(port, *dp++, 0);
92 }
93 if (*dp == DLE)
94 tty_insert_flip_char(port, DLE, 0);
95 last = *dp;
96 } else {
97 #endif
98 if (len > 1)
99 tty_insert_flip_string(port, skb->data, len - 1);
100 last = skb->data[len - 1];
101 #ifdef CONFIG_ISDN_AUDIO
102 }
103 #endif
104 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
105 tty_insert_flip_char(port, last, 0xFF);
106 else
107 tty_insert_flip_char(port, last, TTY_NORMAL);
108 tty_flip_buffer_push(port);
109 kfree_skb(skb);
110
111 return 1;
112 }
113
114 /* isdn_tty_readmodem() is called periodically from within timer-interrupt.
115 * It tries getting received data from the receive queue an stuff it into
116 * the tty's flip-buffer.
117 */
118 void
119 isdn_tty_readmodem(void)
120 {
121 int resched = 0;
122 int midx;
123 int i;
124 int r;
125 modem_info *info;
126
127 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
128 midx = dev->m_idx[i];
129 if (midx < 0)
130 continue;
131
132 info = &dev->mdm.info[midx];
133 if (!info->online)
134 continue;
135
136 r = 0;
137 #ifdef CONFIG_ISDN_AUDIO
138 isdn_audio_eval_dtmf(info);
139 if ((info->vonline & 1) && (info->emu.vpar[1]))
140 isdn_audio_eval_silence(info);
141 #endif
142 if (info->mcr & UART_MCR_RTS) {
143 /* CISCO AsyncPPP Hack */
144 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
145 r = isdn_readbchan_tty(info->isdn_driver,
146 info->isdn_channel,
147 &info->port, 0);
148 else
149 r = isdn_readbchan_tty(info->isdn_driver,
150 info->isdn_channel,
151 &info->port, 1);
152 if (r)
153 tty_flip_buffer_push(&info->port);
154 } else
155 r = 1;
156
157 if (r) {
158 info->rcvsched = 0;
159 resched = 1;
160 } else
161 info->rcvsched = 1;
162 }
163 if (!resched)
164 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
165 }
166
167 int
168 isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
169 {
170 ulong flags;
171 int midx;
172 #ifdef CONFIG_ISDN_AUDIO
173 int ifmt;
174 #endif
175 modem_info *info;
176
177 if ((midx = dev->m_idx[i]) < 0) {
178 /* if midx is invalid, packet is not for tty */
179 return 0;
180 }
181 info = &dev->mdm.info[midx];
182 #ifdef CONFIG_ISDN_AUDIO
183 ifmt = 1;
184
185 if ((info->vonline) && (!info->emu.vpar[4]))
186 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
187 if ((info->vonline & 1) && (info->emu.vpar[1]))
188 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
189 #endif
190 if ((info->online < 2)
191 #ifdef CONFIG_ISDN_AUDIO
192 && (!(info->vonline & 1))
193 #endif
194 ) {
195 /* If Modem not listening, drop data */
196 kfree_skb(skb);
197 return 1;
198 }
199 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
200 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
201 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */
202 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */
203 skb_pull(skb, 4);
204 else
205 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */
206 skb_pull(skb, 2);
207 } else
208 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
209 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
210 skb_pull(skb, 4);
211 }
212 #ifdef CONFIG_ISDN_AUDIO
213 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
214 ISDN_AUDIO_SKB_LOCK(skb) = 0;
215 if (info->vonline & 1) {
216 /* voice conversion/compression */
217 switch (info->emu.vpar[3]) {
218 case 2:
219 case 3:
220 case 4:
221 /* adpcm
222 * Since compressed data takes less
223 * space, we can overwrite the buffer.
224 */
225 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
226 ifmt,
227 skb->data,
228 skb->data,
229 skb->len));
230 break;
231 case 5:
232 /* a-law */
233 if (!ifmt)
234 isdn_audio_ulaw2alaw(skb->data, skb->len);
235 break;
236 case 6:
237 /* u-law */
238 if (ifmt)
239 isdn_audio_alaw2ulaw(skb->data, skb->len);
240 break;
241 }
242 ISDN_AUDIO_SKB_DLECOUNT(skb) =
243 isdn_tty_countDLE(skb->data, skb->len);
244 }
245 #ifdef CONFIG_ISDN_TTY_FAX
246 else {
247 if (info->faxonline & 2) {
248 isdn_tty_fax_bitorder(info, skb);
249 ISDN_AUDIO_SKB_DLECOUNT(skb) =
250 isdn_tty_countDLE(skb->data, skb->len);
251 }
252 }
253 #endif
254 #endif
255 /* Try to deliver directly via tty-buf if queue is empty */
256 spin_lock_irqsave(&info->readlock, flags);
257 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
258 if (isdn_tty_try_read(info, skb)) {
259 spin_unlock_irqrestore(&info->readlock, flags);
260 return 1;
261 }
262 /* Direct deliver failed or queue wasn't empty.
263 * Queue up for later dequeueing via timer-irq.
264 */
265 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
266 dev->drv[di]->rcvcount[channel] +=
267 (skb->len
268 #ifdef CONFIG_ISDN_AUDIO
269 + ISDN_AUDIO_SKB_DLECOUNT(skb)
270 #endif
271 );
272 spin_unlock_irqrestore(&info->readlock, flags);
273 /* Schedule dequeuing */
274 if ((dev->modempoll) && (info->rcvsched))
275 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
276 return 1;
277 }
278
279 static void
280 isdn_tty_cleanup_xmit(modem_info *info)
281 {
282 skb_queue_purge(&info->xmit_queue);
283 #ifdef CONFIG_ISDN_AUDIO
284 skb_queue_purge(&info->dtmf_queue);
285 #endif
286 }
287
288 static void
289 isdn_tty_tint(modem_info *info)
290 {
291 struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
292 int len, slen;
293
294 if (!skb)
295 return;
296 len = skb->len;
297 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
298 info->isdn_channel, 1, skb)) == len) {
299 struct tty_struct *tty = info->port.tty;
300 info->send_outstanding++;
301 info->msr &= ~UART_MSR_CTS;
302 info->lsr &= ~UART_LSR_TEMT;
303 tty_wakeup(tty);
304 return;
305 }
306 if (slen < 0) {
307 /* Error: no channel, already shutdown, or wrong parameter */
308 dev_kfree_skb(skb);
309 return;
310 }
311 skb_queue_head(&info->xmit_queue, skb);
312 }
313
314 #ifdef CONFIG_ISDN_AUDIO
315 static int
316 isdn_tty_countDLE(unsigned char *buf, int len)
317 {
318 int count = 0;
319
320 while (len--)
321 if (*buf++ == DLE)
322 count++;
323 return count;
324 }
325
326 /* This routine is called from within isdn_tty_write() to perform
327 * DLE-decoding when sending audio-data.
328 */
329 static int
330 isdn_tty_handleDLEdown(modem_info *info, atemu *m, int len)
331 {
332 unsigned char *p = &info->port.xmit_buf[info->xmit_count];
333 int count = 0;
334
335 while (len > 0) {
336 if (m->lastDLE) {
337 m->lastDLE = 0;
338 switch (*p) {
339 case DLE:
340 /* Escape code */
341 if (len > 1)
342 memmove(p, p + 1, len - 1);
343 p--;
344 count++;
345 break;
346 case ETX:
347 /* End of data */
348 info->vonline |= 4;
349 return count;
350 case DC4:
351 /* Abort RX */
352 info->vonline &= ~1;
353 #ifdef ISDN_DEBUG_MODEM_VOICE
354 printk(KERN_DEBUG
355 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
356 info->line);
357 #endif
358 isdn_tty_at_cout("\020\003", info);
359 if (!info->vonline) {
360 #ifdef ISDN_DEBUG_MODEM_VOICE
361 printk(KERN_DEBUG
362 "DLEdown: send VCON on ttyI%d\n",
363 info->line);
364 #endif
365 isdn_tty_at_cout("\r\nVCON\r\n", info);
366 }
367 /* Fall through */
368 case 'q':
369 case 's':
370 /* Silence */
371 if (len > 1)
372 memmove(p, p + 1, len - 1);
373 p--;
374 break;
375 }
376 } else {
377 if (*p == DLE)
378 m->lastDLE = 1;
379 else
380 count++;
381 }
382 p++;
383 len--;
384 }
385 if (len < 0) {
386 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
387 return 0;
388 }
389 return count;
390 }
391
392 /* This routine is called from within isdn_tty_write() when receiving
393 * audio-data. It interrupts receiving, if an character other than
394 * ^S or ^Q is sent.
395 */
396 static int
397 isdn_tty_end_vrx(const char *buf, int c)
398 {
399 char ch;
400
401 while (c--) {
402 ch = *buf;
403 if ((ch != 0x11) && (ch != 0x13))
404 return 1;
405 buf++;
406 }
407 return 0;
408 }
409
410 static int voice_cf[7] =
411 {0, 0, 4, 3, 2, 0, 0};
412
413 #endif /* CONFIG_ISDN_AUDIO */
414
415 /* isdn_tty_senddown() is called either directly from within isdn_tty_write()
416 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
417 * outgoing data from the tty's xmit-buffer, handles voice-decompression or
418 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
419 */
420 static void
421 isdn_tty_senddown(modem_info *info)
422 {
423 int buflen;
424 int skb_res;
425 #ifdef CONFIG_ISDN_AUDIO
426 int audio_len;
427 #endif
428 struct sk_buff *skb;
429
430 #ifdef CONFIG_ISDN_AUDIO
431 if (info->vonline & 4) {
432 info->vonline &= ~6;
433 if (!info->vonline) {
434 #ifdef ISDN_DEBUG_MODEM_VOICE
435 printk(KERN_DEBUG
436 "senddown: send VCON on ttyI%d\n",
437 info->line);
438 #endif
439 isdn_tty_at_cout("\r\nVCON\r\n", info);
440 }
441 }
442 #endif
443 if (!(buflen = info->xmit_count))
444 return;
445 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
446 info->msr &= ~UART_MSR_CTS;
447 info->lsr &= ~UART_LSR_TEMT;
448 /* info->xmit_count is modified here and in isdn_tty_write().
449 * So we return here if isdn_tty_write() is in the
450 * critical section.
451 */
452 atomic_inc(&info->xmit_lock);
453 if (!(atomic_dec_and_test(&info->xmit_lock)))
454 return;
455 if (info->isdn_driver < 0) {
456 info->xmit_count = 0;
457 return;
458 }
459 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
460 #ifdef CONFIG_ISDN_AUDIO
461 if (info->vonline & 2)
462 audio_len = buflen * voice_cf[info->emu.vpar[3]];
463 else
464 audio_len = 0;
465 skb = dev_alloc_skb(skb_res + buflen + audio_len);
466 #else
467 skb = dev_alloc_skb(skb_res + buflen);
468 #endif
469 if (!skb) {
470 printk(KERN_WARNING
471 "isdn_tty: Out of memory in ttyI%d senddown\n",
472 info->line);
473 return;
474 }
475 skb_reserve(skb, skb_res);
476 memcpy(skb_put(skb, buflen), info->port.xmit_buf, buflen);
477 info->xmit_count = 0;
478 #ifdef CONFIG_ISDN_AUDIO
479 if (info->vonline & 2) {
480 /* For now, ifmt is fixed to 1 (alaw), since this
481 * is used with ISDN everywhere in the world, except
482 * US, Canada and Japan.
483 * Later, when US-ISDN protocols are implemented,
484 * this setting will depend on the D-channel protocol.
485 */
486 int ifmt = 1;
487
488 /* voice conversion/decompression */
489 switch (info->emu.vpar[3]) {
490 case 2:
491 case 3:
492 case 4:
493 /* adpcm, compatible to ZyXel 1496 modem
494 * with ROM revision 6.01
495 */
496 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
497 ifmt,
498 skb->data,
499 skb_put(skb, audio_len),
500 buflen);
501 skb_pull(skb, buflen);
502 skb_trim(skb, audio_len);
503 break;
504 case 5:
505 /* a-law */
506 if (!ifmt)
507 isdn_audio_alaw2ulaw(skb->data,
508 buflen);
509 break;
510 case 6:
511 /* u-law */
512 if (ifmt)
513 isdn_audio_ulaw2alaw(skb->data,
514 buflen);
515 break;
516 }
517 }
518 #endif /* CONFIG_ISDN_AUDIO */
519 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
520 /* Add T.70 simplified header */
521 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
522 memcpy(skb_push(skb, 2), "\1\0", 2);
523 else
524 memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
525 }
526 skb_queue_tail(&info->xmit_queue, skb);
527 }
528
529 /************************************************************
530 *
531 * Modem-functions
532 *
533 * mostly "stolen" from original Linux-serial.c and friends.
534 *
535 ************************************************************/
536
537 /* The next routine is called once from within timer-interrupt
538 * triggered within isdn_tty_modem_ncarrier(). It calls
539 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
540 * into the tty's buffer.
541 */
542 static void
543 isdn_tty_modem_do_ncarrier(unsigned long data)
544 {
545 modem_info *info = (modem_info *) data;
546 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
547 }
548
549 /* Next routine is called, whenever the DTR-signal is raised.
550 * It checks the ncarrier-flag, and triggers the above routine
551 * when necessary. The ncarrier-flag is set, whenever DTR goes
552 * low.
553 */
554 static void
555 isdn_tty_modem_ncarrier(modem_info *info)
556 {
557 if (info->ncarrier) {
558 info->nc_timer.expires = jiffies + HZ;
559 add_timer(&info->nc_timer);
560 }
561 }
562
563 /*
564 * return the usage calculated by si and layer 2 protocol
565 */
566 static int
567 isdn_calc_usage(int si, int l2)
568 {
569 int usg = ISDN_USAGE_MODEM;
570
571 #ifdef CONFIG_ISDN_AUDIO
572 if (si == 1) {
573 switch (l2) {
574 case ISDN_PROTO_L2_MODEM:
575 usg = ISDN_USAGE_MODEM;
576 break;
577 #ifdef CONFIG_ISDN_TTY_FAX
578 case ISDN_PROTO_L2_FAX:
579 usg = ISDN_USAGE_FAX;
580 break;
581 #endif
582 case ISDN_PROTO_L2_TRANS:
583 default:
584 usg = ISDN_USAGE_VOICE;
585 break;
586 }
587 }
588 #endif
589 return (usg);
590 }
591
592 /* isdn_tty_dial() performs dialing of a tty an the necessary
593 * setup of the lower levels before that.
594 */
595 static void
596 isdn_tty_dial(char *n, modem_info *info, atemu *m)
597 {
598 int usg = ISDN_USAGE_MODEM;
599 int si = 7;
600 int l2 = m->mdmreg[REG_L2PROT];
601 u_long flags;
602 isdn_ctrl cmd;
603 int i;
604 int j;
605
606 for (j = 7; j >= 0; j--)
607 if (m->mdmreg[REG_SI1] & (1 << j)) {
608 si = bit2si[j];
609 break;
610 }
611 usg = isdn_calc_usage(si, l2);
612 #ifdef CONFIG_ISDN_AUDIO
613 if ((si == 1) &&
614 (l2 != ISDN_PROTO_L2_MODEM)
615 #ifdef CONFIG_ISDN_TTY_FAX
616 && (l2 != ISDN_PROTO_L2_FAX)
617 #endif
618 ) {
619 l2 = ISDN_PROTO_L2_TRANS;
620 usg = ISDN_USAGE_VOICE;
621 }
622 #endif
623 m->mdmreg[REG_SI1I] = si2bit[si];
624 spin_lock_irqsave(&dev->lock, flags);
625 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
626 if (i < 0) {
627 spin_unlock_irqrestore(&dev->lock, flags);
628 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
629 } else {
630 info->isdn_driver = dev->drvmap[i];
631 info->isdn_channel = dev->chanmap[i];
632 info->drv_index = i;
633 dev->m_idx[i] = info->line;
634 dev->usage[i] |= ISDN_USAGE_OUTGOING;
635 info->last_dir = 1;
636 strcpy(info->last_num, n);
637 isdn_info_update();
638 spin_unlock_irqrestore(&dev->lock, flags);
639 cmd.driver = info->isdn_driver;
640 cmd.arg = info->isdn_channel;
641 cmd.command = ISDN_CMD_CLREAZ;
642 isdn_command(&cmd);
643 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
644 cmd.driver = info->isdn_driver;
645 cmd.command = ISDN_CMD_SETEAZ;
646 isdn_command(&cmd);
647 cmd.driver = info->isdn_driver;
648 cmd.command = ISDN_CMD_SETL2;
649 info->last_l2 = l2;
650 cmd.arg = info->isdn_channel + (l2 << 8);
651 isdn_command(&cmd);
652 cmd.driver = info->isdn_driver;
653 cmd.command = ISDN_CMD_SETL3;
654 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
655 #ifdef CONFIG_ISDN_TTY_FAX
656 if (l2 == ISDN_PROTO_L2_FAX) {
657 cmd.parm.fax = info->fax;
658 info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
659 }
660 #endif
661 isdn_command(&cmd);
662 cmd.driver = info->isdn_driver;
663 cmd.arg = info->isdn_channel;
664 sprintf(cmd.parm.setup.phone, "%s", n);
665 sprintf(cmd.parm.setup.eazmsn, "%s",
666 isdn_map_eaz2msn(m->msn, info->isdn_driver));
667 cmd.parm.setup.si1 = si;
668 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
669 cmd.command = ISDN_CMD_DIAL;
670 info->dialing = 1;
671 info->emu.carrierwait = 0;
672 strcpy(dev->num[i], n);
673 isdn_info_update();
674 isdn_command(&cmd);
675 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
676 }
677 }
678
679 /* isdn_tty_hangup() disassociates a tty from the real
680 * ISDN-line (hangup). The usage-status is cleared
681 * and some cleanup is done also.
682 */
683 void
684 isdn_tty_modem_hup(modem_info *info, int local)
685 {
686 isdn_ctrl cmd;
687 int di, ch;
688
689 if (!info)
690 return;
691
692 di = info->isdn_driver;
693 ch = info->isdn_channel;
694 if (di < 0 || ch < 0)
695 return;
696
697 info->isdn_driver = -1;
698 info->isdn_channel = -1;
699
700 #ifdef ISDN_DEBUG_MODEM_HUP
701 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
702 #endif
703 info->rcvsched = 0;
704 isdn_tty_flush_buffer(info->port.tty);
705 if (info->online) {
706 info->last_lhup = local;
707 info->online = 0;
708 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
709 }
710 #ifdef CONFIG_ISDN_AUDIO
711 info->vonline = 0;
712 #ifdef CONFIG_ISDN_TTY_FAX
713 info->faxonline = 0;
714 info->fax->phase = ISDN_FAX_PHASE_IDLE;
715 #endif
716 info->emu.vpar[4] = 0;
717 info->emu.vpar[5] = 8;
718 kfree(info->dtmf_state);
719 info->dtmf_state = NULL;
720 kfree(info->silence_state);
721 info->silence_state = NULL;
722 kfree(info->adpcms);
723 info->adpcms = NULL;
724 kfree(info->adpcmr);
725 info->adpcmr = NULL;
726 #endif
727 if ((info->msr & UART_MSR_RI) &&
728 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
729 isdn_tty_modem_result(RESULT_RUNG, info);
730 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
731 info->lsr |= UART_LSR_TEMT;
732
733 if (local) {
734 cmd.driver = di;
735 cmd.command = ISDN_CMD_HANGUP;
736 cmd.arg = ch;
737 isdn_command(&cmd);
738 }
739
740 isdn_all_eaz(di, ch);
741 info->emu.mdmreg[REG_RINGCNT] = 0;
742 isdn_free_channel(di, ch, 0);
743
744 if (info->drv_index >= 0) {
745 dev->m_idx[info->drv_index] = -1;
746 info->drv_index = -1;
747 }
748 }
749
750 /*
751 * Begin of a CAPI like interface, currently used only for
752 * supplementary service (CAPI 2.0 part III)
753 */
754 #include <linux/isdn/capicmd.h>
755 #include <linux/module.h>
756
757 int
758 isdn_tty_capi_facility(capi_msg *cm) {
759 return (-1); /* dummy */
760 }
761
762 /* isdn_tty_suspend() tries to suspend the current tty connection
763 */
764 static void
765 isdn_tty_suspend(char *id, modem_info *info, atemu *m)
766 {
767 isdn_ctrl cmd;
768
769 int l;
770
771 if (!info)
772 return;
773
774 #ifdef ISDN_DEBUG_MODEM_SERVICES
775 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
776 #endif
777 l = strlen(id);
778 if ((info->isdn_driver >= 0)) {
779 cmd.parm.cmsg.Length = l + 18;
780 cmd.parm.cmsg.Command = CAPI_FACILITY;
781 cmd.parm.cmsg.Subcommand = CAPI_REQ;
782 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
783 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
784 cmd.parm.cmsg.para[1] = 0;
785 cmd.parm.cmsg.para[2] = l + 3;
786 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
787 cmd.parm.cmsg.para[4] = 0;
788 cmd.parm.cmsg.para[5] = l;
789 strncpy(&cmd.parm.cmsg.para[6], id, l);
790 cmd.command = CAPI_PUT_MESSAGE;
791 cmd.driver = info->isdn_driver;
792 cmd.arg = info->isdn_channel;
793 isdn_command(&cmd);
794 }
795 }
796
797 /* isdn_tty_resume() tries to resume a suspended call
798 * setup of the lower levels before that. unfortunately here is no
799 * checking for compatibility of used protocols implemented by Q931
800 * It does the same things like isdn_tty_dial, the last command
801 * is different, may be we can merge it.
802 */
803
804 static void
805 isdn_tty_resume(char *id, modem_info *info, atemu *m)
806 {
807 int usg = ISDN_USAGE_MODEM;
808 int si = 7;
809 int l2 = m->mdmreg[REG_L2PROT];
810 isdn_ctrl cmd;
811 ulong flags;
812 int i;
813 int j;
814 int l;
815
816 l = strlen(id);
817 for (j = 7; j >= 0; j--)
818 if (m->mdmreg[REG_SI1] & (1 << j)) {
819 si = bit2si[j];
820 break;
821 }
822 usg = isdn_calc_usage(si, l2);
823 #ifdef CONFIG_ISDN_AUDIO
824 if ((si == 1) &&
825 (l2 != ISDN_PROTO_L2_MODEM)
826 #ifdef CONFIG_ISDN_TTY_FAX
827 && (l2 != ISDN_PROTO_L2_FAX)
828 #endif
829 ) {
830 l2 = ISDN_PROTO_L2_TRANS;
831 usg = ISDN_USAGE_VOICE;
832 }
833 #endif
834 m->mdmreg[REG_SI1I] = si2bit[si];
835 spin_lock_irqsave(&dev->lock, flags);
836 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
837 if (i < 0) {
838 spin_unlock_irqrestore(&dev->lock, flags);
839 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
840 } else {
841 info->isdn_driver = dev->drvmap[i];
842 info->isdn_channel = dev->chanmap[i];
843 info->drv_index = i;
844 dev->m_idx[i] = info->line;
845 dev->usage[i] |= ISDN_USAGE_OUTGOING;
846 info->last_dir = 1;
847 // strcpy(info->last_num, n);
848 isdn_info_update();
849 spin_unlock_irqrestore(&dev->lock, flags);
850 cmd.driver = info->isdn_driver;
851 cmd.arg = info->isdn_channel;
852 cmd.command = ISDN_CMD_CLREAZ;
853 isdn_command(&cmd);
854 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
855 cmd.driver = info->isdn_driver;
856 cmd.command = ISDN_CMD_SETEAZ;
857 isdn_command(&cmd);
858 cmd.driver = info->isdn_driver;
859 cmd.command = ISDN_CMD_SETL2;
860 info->last_l2 = l2;
861 cmd.arg = info->isdn_channel + (l2 << 8);
862 isdn_command(&cmd);
863 cmd.driver = info->isdn_driver;
864 cmd.command = ISDN_CMD_SETL3;
865 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
866 isdn_command(&cmd);
867 cmd.driver = info->isdn_driver;
868 cmd.arg = info->isdn_channel;
869 cmd.parm.cmsg.Length = l + 18;
870 cmd.parm.cmsg.Command = CAPI_FACILITY;
871 cmd.parm.cmsg.Subcommand = CAPI_REQ;
872 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
873 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
874 cmd.parm.cmsg.para[1] = 0;
875 cmd.parm.cmsg.para[2] = l + 3;
876 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
877 cmd.parm.cmsg.para[4] = 0;
878 cmd.parm.cmsg.para[5] = l;
879 strncpy(&cmd.parm.cmsg.para[6], id, l);
880 cmd.command = CAPI_PUT_MESSAGE;
881 info->dialing = 1;
882 // strcpy(dev->num[i], n);
883 isdn_info_update();
884 isdn_command(&cmd);
885 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
886 }
887 }
888
889 /* isdn_tty_send_msg() sends a message to a HL driver
890 * This is used for hybrid modem cards to send AT commands to it
891 */
892
893 static void
894 isdn_tty_send_msg(modem_info *info, atemu *m, char *msg)
895 {
896 int usg = ISDN_USAGE_MODEM;
897 int si = 7;
898 int l2 = m->mdmreg[REG_L2PROT];
899 isdn_ctrl cmd;
900 ulong flags;
901 int i;
902 int j;
903 int l;
904
905 l = strlen(msg);
906 if (!l) {
907 isdn_tty_modem_result(RESULT_ERROR, info);
908 return;
909 }
910 for (j = 7; j >= 0; j--)
911 if (m->mdmreg[REG_SI1] & (1 << j)) {
912 si = bit2si[j];
913 break;
914 }
915 usg = isdn_calc_usage(si, l2);
916 #ifdef CONFIG_ISDN_AUDIO
917 if ((si == 1) &&
918 (l2 != ISDN_PROTO_L2_MODEM)
919 #ifdef CONFIG_ISDN_TTY_FAX
920 && (l2 != ISDN_PROTO_L2_FAX)
921 #endif
922 ) {
923 l2 = ISDN_PROTO_L2_TRANS;
924 usg = ISDN_USAGE_VOICE;
925 }
926 #endif
927 m->mdmreg[REG_SI1I] = si2bit[si];
928 spin_lock_irqsave(&dev->lock, flags);
929 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
930 if (i < 0) {
931 spin_unlock_irqrestore(&dev->lock, flags);
932 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
933 } else {
934 info->isdn_driver = dev->drvmap[i];
935 info->isdn_channel = dev->chanmap[i];
936 info->drv_index = i;
937 dev->m_idx[i] = info->line;
938 dev->usage[i] |= ISDN_USAGE_OUTGOING;
939 info->last_dir = 1;
940 isdn_info_update();
941 spin_unlock_irqrestore(&dev->lock, flags);
942 cmd.driver = info->isdn_driver;
943 cmd.arg = info->isdn_channel;
944 cmd.command = ISDN_CMD_CLREAZ;
945 isdn_command(&cmd);
946 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
947 cmd.driver = info->isdn_driver;
948 cmd.command = ISDN_CMD_SETEAZ;
949 isdn_command(&cmd);
950 cmd.driver = info->isdn_driver;
951 cmd.command = ISDN_CMD_SETL2;
952 info->last_l2 = l2;
953 cmd.arg = info->isdn_channel + (l2 << 8);
954 isdn_command(&cmd);
955 cmd.driver = info->isdn_driver;
956 cmd.command = ISDN_CMD_SETL3;
957 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
958 isdn_command(&cmd);
959 cmd.driver = info->isdn_driver;
960 cmd.arg = info->isdn_channel;
961 cmd.parm.cmsg.Length = l + 14;
962 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
963 cmd.parm.cmsg.Subcommand = CAPI_REQ;
964 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
965 cmd.parm.cmsg.para[0] = l + 1;
966 strncpy(&cmd.parm.cmsg.para[1], msg, l);
967 cmd.parm.cmsg.para[l + 1] = 0xd;
968 cmd.command = CAPI_PUT_MESSAGE;
969 /* info->dialing = 1;
970 strcpy(dev->num[i], n);
971 isdn_info_update();
972 */
973 isdn_command(&cmd);
974 }
975 }
976
977 static inline int
978 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
979 {
980 #ifdef MODEM_PARANOIA_CHECK
981 if (!info) {
982 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
983 name, routine);
984 return 1;
985 }
986 if (info->magic != ISDN_ASYNC_MAGIC) {
987 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
988 name, routine);
989 return 1;
990 }
991 #endif
992 return 0;
993 }
994
995 /*
996 * This routine is called to set the UART divisor registers to match
997 * the specified baud rate for a serial port.
998 */
999 static void
1000 isdn_tty_change_speed(modem_info *info)
1001 {
1002 struct tty_port *port = &info->port;
1003 uint cflag,
1004 cval,
1005 quot;
1006 int i;
1007
1008 if (!port->tty)
1009 return;
1010 cflag = port->tty->termios.c_cflag;
1011
1012 quot = i = cflag & CBAUD;
1013 if (i & CBAUDEX) {
1014 i &= ~CBAUDEX;
1015 if (i < 1 || i > 2)
1016 port->tty->termios.c_cflag &= ~CBAUDEX;
1017 else
1018 i += 15;
1019 }
1020 if (quot) {
1021 info->mcr |= UART_MCR_DTR;
1022 isdn_tty_modem_ncarrier(info);
1023 } else {
1024 info->mcr &= ~UART_MCR_DTR;
1025 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1026 #ifdef ISDN_DEBUG_MODEM_HUP
1027 printk(KERN_DEBUG "Mhup in changespeed\n");
1028 #endif
1029 if (info->online)
1030 info->ncarrier = 1;
1031 isdn_tty_modem_reset_regs(info, 0);
1032 isdn_tty_modem_hup(info, 1);
1033 }
1034 return;
1035 }
1036 /* byte size and parity */
1037 cval = cflag & (CSIZE | CSTOPB);
1038 cval >>= 4;
1039 if (cflag & PARENB)
1040 cval |= UART_LCR_PARITY;
1041 if (!(cflag & PARODD))
1042 cval |= UART_LCR_EPAR;
1043
1044 /* CTS flow control flag and modem status interrupts */
1045 if (cflag & CRTSCTS) {
1046 port->flags |= ASYNC_CTS_FLOW;
1047 } else
1048 port->flags &= ~ASYNC_CTS_FLOW;
1049 if (cflag & CLOCAL)
1050 port->flags &= ~ASYNC_CHECK_CD;
1051 else {
1052 port->flags |= ASYNC_CHECK_CD;
1053 }
1054 }
1055
1056 static int
1057 isdn_tty_startup(modem_info *info)
1058 {
1059 if (info->port.flags & ASYNC_INITIALIZED)
1060 return 0;
1061 isdn_lock_drivers();
1062 #ifdef ISDN_DEBUG_MODEM_OPEN
1063 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1064 #endif
1065 /*
1066 * Now, initialize the UART
1067 */
1068 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1069 if (info->port.tty)
1070 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1071 /*
1072 * and set the speed of the serial port
1073 */
1074 isdn_tty_change_speed(info);
1075
1076 info->port.flags |= ASYNC_INITIALIZED;
1077 info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1078 info->send_outstanding = 0;
1079 return 0;
1080 }
1081
1082 /*
1083 * This routine will shutdown a serial port; interrupts are disabled, and
1084 * DTR is dropped if the hangup on close termio flag is on.
1085 */
1086 static void
1087 isdn_tty_shutdown(modem_info *info)
1088 {
1089 if (!(info->port.flags & ASYNC_INITIALIZED))
1090 return;
1091 #ifdef ISDN_DEBUG_MODEM_OPEN
1092 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1093 #endif
1094 isdn_unlock_drivers();
1095 info->msr &= ~UART_MSR_RI;
1096 if (!info->port.tty || (info->port.tty->termios.c_cflag & HUPCL)) {
1097 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1098 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1099 isdn_tty_modem_reset_regs(info, 0);
1100 #ifdef ISDN_DEBUG_MODEM_HUP
1101 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1102 #endif
1103 isdn_tty_modem_hup(info, 1);
1104 }
1105 }
1106 if (info->port.tty)
1107 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1108
1109 info->port.flags &= ~ASYNC_INITIALIZED;
1110 }
1111
1112 /* isdn_tty_write() is the main send-routine. It is called from the upper
1113 * levels within the kernel to perform sending data. Depending on the
1114 * online-flag it either directs output to the at-command-interpreter or
1115 * to the lower level. Additional tasks done here:
1116 * - If online, check for escape-sequence (+++)
1117 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1118 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1119 * - If dialing, abort dial.
1120 */
1121 static int
1122 isdn_tty_write(struct tty_struct *tty, const u_char *buf, int count)
1123 {
1124 int c;
1125 int total = 0;
1126 modem_info *info = (modem_info *) tty->driver_data;
1127 atemu *m = &info->emu;
1128
1129 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1130 return 0;
1131 /* See isdn_tty_senddown() */
1132 atomic_inc(&info->xmit_lock);
1133 while (1) {
1134 c = count;
1135 if (c > info->xmit_size - info->xmit_count)
1136 c = info->xmit_size - info->xmit_count;
1137 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1138 c = dev->drv[info->isdn_driver]->maxbufsize;
1139 if (c <= 0)
1140 break;
1141 if ((info->online > 1)
1142 #ifdef CONFIG_ISDN_AUDIO
1143 || (info->vonline & 3)
1144 #endif
1145 ) {
1146 #ifdef CONFIG_ISDN_AUDIO
1147 if (!info->vonline)
1148 #endif
1149 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1150 &(m->pluscount),
1151 &(m->lastplus));
1152 memcpy(&info->port.xmit_buf[info->xmit_count], buf, c);
1153 #ifdef CONFIG_ISDN_AUDIO
1154 if (info->vonline) {
1155 int cc = isdn_tty_handleDLEdown(info, m, c);
1156 if (info->vonline & 2) {
1157 if (!cc) {
1158 /* If DLE decoding results in zero-transmit, but
1159 * c originally was non-zero, do a wakeup.
1160 */
1161 tty_wakeup(tty);
1162 info->msr |= UART_MSR_CTS;
1163 info->lsr |= UART_LSR_TEMT;
1164 }
1165 info->xmit_count += cc;
1166 }
1167 if ((info->vonline & 3) == 1) {
1168 /* Do NOT handle Ctrl-Q or Ctrl-S
1169 * when in full-duplex audio mode.
1170 */
1171 if (isdn_tty_end_vrx(buf, c)) {
1172 info->vonline &= ~1;
1173 #ifdef ISDN_DEBUG_MODEM_VOICE
1174 printk(KERN_DEBUG
1175 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1176 info->line);
1177 #endif
1178 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1179 }
1180 }
1181 } else
1182 if (TTY_IS_FCLASS1(info)) {
1183 int cc = isdn_tty_handleDLEdown(info, m, c);
1184
1185 if (info->vonline & 4) { /* ETX seen */
1186 isdn_ctrl c;
1187
1188 c.command = ISDN_CMD_FAXCMD;
1189 c.driver = info->isdn_driver;
1190 c.arg = info->isdn_channel;
1191 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1192 c.parm.aux.subcmd = ETX;
1193 isdn_command(&c);
1194 }
1195 info->vonline = 0;
1196 #ifdef ISDN_DEBUG_MODEM_VOICE
1197 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1198 #endif
1199 info->xmit_count += cc;
1200 } else
1201 #endif
1202 info->xmit_count += c;
1203 } else {
1204 info->msr |= UART_MSR_CTS;
1205 info->lsr |= UART_LSR_TEMT;
1206 if (info->dialing) {
1207 info->dialing = 0;
1208 #ifdef ISDN_DEBUG_MODEM_HUP
1209 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1210 #endif
1211 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1212 isdn_tty_modem_hup(info, 1);
1213 } else
1214 c = isdn_tty_edit_at(buf, c, info);
1215 }
1216 buf += c;
1217 count -= c;
1218 total += c;
1219 }
1220 atomic_dec(&info->xmit_lock);
1221 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1222 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1223 isdn_tty_senddown(info);
1224 isdn_tty_tint(info);
1225 }
1226 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1227 }
1228 return total;
1229 }
1230
1231 static int
1232 isdn_tty_write_room(struct tty_struct *tty)
1233 {
1234 modem_info *info = (modem_info *) tty->driver_data;
1235 int ret;
1236
1237 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1238 return 0;
1239 if (!info->online)
1240 return info->xmit_size;
1241 ret = info->xmit_size - info->xmit_count;
1242 return (ret < 0) ? 0 : ret;
1243 }
1244
1245 static int
1246 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1247 {
1248 modem_info *info = (modem_info *) tty->driver_data;
1249
1250 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1251 return 0;
1252 if (!info->online)
1253 return 0;
1254 return (info->xmit_count);
1255 }
1256
1257 static void
1258 isdn_tty_flush_buffer(struct tty_struct *tty)
1259 {
1260 modem_info *info;
1261
1262 if (!tty) {
1263 return;
1264 }
1265 info = (modem_info *) tty->driver_data;
1266 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1267 return;
1268 }
1269 isdn_tty_cleanup_xmit(info);
1270 info->xmit_count = 0;
1271 tty_wakeup(tty);
1272 }
1273
1274 static void
1275 isdn_tty_flush_chars(struct tty_struct *tty)
1276 {
1277 modem_info *info = (modem_info *) tty->driver_data;
1278
1279 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1280 return;
1281 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1282 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1283 }
1284
1285 /*
1286 * ------------------------------------------------------------
1287 * isdn_tty_throttle()
1288 *
1289 * This routine is called by the upper-layer tty layer to signal that
1290 * incoming characters should be throttled.
1291 * ------------------------------------------------------------
1292 */
1293 static void
1294 isdn_tty_throttle(struct tty_struct *tty)
1295 {
1296 modem_info *info = (modem_info *) tty->driver_data;
1297
1298 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1299 return;
1300 if (I_IXOFF(tty))
1301 info->x_char = STOP_CHAR(tty);
1302 info->mcr &= ~UART_MCR_RTS;
1303 }
1304
1305 static void
1306 isdn_tty_unthrottle(struct tty_struct *tty)
1307 {
1308 modem_info *info = (modem_info *) tty->driver_data;
1309
1310 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1311 return;
1312 if (I_IXOFF(tty)) {
1313 if (info->x_char)
1314 info->x_char = 0;
1315 else
1316 info->x_char = START_CHAR(tty);
1317 }
1318 info->mcr |= UART_MCR_RTS;
1319 }
1320
1321 /*
1322 * ------------------------------------------------------------
1323 * isdn_tty_ioctl() and friends
1324 * ------------------------------------------------------------
1325 */
1326
1327 /*
1328 * isdn_tty_get_lsr_info - get line status register info
1329 *
1330 * Purpose: Let user call ioctl() to get info when the UART physically
1331 * is emptied. On bus types like RS485, the transmitter must
1332 * release the bus after transmitting. This must be done when
1333 * the transmit shift register is empty, not be done when the
1334 * transmit holding register is empty. This functionality
1335 * allows RS485 driver to be written in user space.
1336 */
1337 static int
1338 isdn_tty_get_lsr_info(modem_info *info, uint __user *value)
1339 {
1340 u_char status;
1341 uint result;
1342
1343 status = info->lsr;
1344 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1345 return put_user(result, value);
1346 }
1347
1348
1349 static int
1350 isdn_tty_tiocmget(struct tty_struct *tty)
1351 {
1352 modem_info *info = (modem_info *) tty->driver_data;
1353 u_char control, status;
1354
1355 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1356 return -ENODEV;
1357 if (tty->flags & (1 << TTY_IO_ERROR))
1358 return -EIO;
1359
1360 mutex_lock(&modem_info_mutex);
1361 #ifdef ISDN_DEBUG_MODEM_IOCTL
1362 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1363 #endif
1364
1365 control = info->mcr;
1366 status = info->msr;
1367 mutex_unlock(&modem_info_mutex);
1368 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1369 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1370 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1371 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1372 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1373 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1374 }
1375
1376 static int
1377 isdn_tty_tiocmset(struct tty_struct *tty,
1378 unsigned int set, unsigned int clear)
1379 {
1380 modem_info *info = (modem_info *) tty->driver_data;
1381
1382 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1383 return -ENODEV;
1384 if (tty->flags & (1 << TTY_IO_ERROR))
1385 return -EIO;
1386
1387 #ifdef ISDN_DEBUG_MODEM_IOCTL
1388 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1389 #endif
1390
1391 mutex_lock(&modem_info_mutex);
1392 if (set & TIOCM_RTS)
1393 info->mcr |= UART_MCR_RTS;
1394 if (set & TIOCM_DTR) {
1395 info->mcr |= UART_MCR_DTR;
1396 isdn_tty_modem_ncarrier(info);
1397 }
1398
1399 if (clear & TIOCM_RTS)
1400 info->mcr &= ~UART_MCR_RTS;
1401 if (clear & TIOCM_DTR) {
1402 info->mcr &= ~UART_MCR_DTR;
1403 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1404 isdn_tty_modem_reset_regs(info, 0);
1405 #ifdef ISDN_DEBUG_MODEM_HUP
1406 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1407 #endif
1408 if (info->online)
1409 info->ncarrier = 1;
1410 isdn_tty_modem_hup(info, 1);
1411 }
1412 }
1413 mutex_unlock(&modem_info_mutex);
1414 return 0;
1415 }
1416
1417 static int
1418 isdn_tty_ioctl(struct tty_struct *tty, uint cmd, ulong arg)
1419 {
1420 modem_info *info = (modem_info *) tty->driver_data;
1421 int retval;
1422
1423 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1424 return -ENODEV;
1425 if (tty->flags & (1 << TTY_IO_ERROR))
1426 return -EIO;
1427 switch (cmd) {
1428 case TCSBRK: /* SVID version: non-zero arg --> no break */
1429 #ifdef ISDN_DEBUG_MODEM_IOCTL
1430 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1431 #endif
1432 retval = tty_check_change(tty);
1433 if (retval)
1434 return retval;
1435 tty_wait_until_sent(tty, 0);
1436 return 0;
1437 case TCSBRKP: /* support for POSIX tcsendbreak() */
1438 #ifdef ISDN_DEBUG_MODEM_IOCTL
1439 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1440 #endif
1441 retval = tty_check_change(tty);
1442 if (retval)
1443 return retval;
1444 tty_wait_until_sent(tty, 0);
1445 return 0;
1446 case TIOCSERGETLSR: /* Get line status register */
1447 #ifdef ISDN_DEBUG_MODEM_IOCTL
1448 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1449 #endif
1450 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1451 default:
1452 #ifdef ISDN_DEBUG_MODEM_IOCTL
1453 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1454 #endif
1455 return -ENOIOCTLCMD;
1456 }
1457 return 0;
1458 }
1459
1460 static void
1461 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1462 {
1463 modem_info *info = (modem_info *) tty->driver_data;
1464
1465 if (!old_termios)
1466 isdn_tty_change_speed(info);
1467 else {
1468 if (tty->termios.c_cflag == old_termios->c_cflag &&
1469 tty->termios.c_ispeed == old_termios->c_ispeed &&
1470 tty->termios.c_ospeed == old_termios->c_ospeed)
1471 return;
1472 isdn_tty_change_speed(info);
1473 if ((old_termios->c_cflag & CRTSCTS) &&
1474 !(tty->termios.c_cflag & CRTSCTS))
1475 tty->hw_stopped = 0;
1476 }
1477 }
1478
1479 /*
1480 * ------------------------------------------------------------
1481 * isdn_tty_open() and friends
1482 * ------------------------------------------------------------
1483 */
1484
1485 static int isdn_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1486 {
1487 modem_info *info = &dev->mdm.info[tty->index];
1488
1489 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1490 return -ENODEV;
1491
1492 tty->driver_data = info;
1493
1494 return tty_port_install(&info->port, driver, tty);
1495 }
1496
1497 /*
1498 * This routine is called whenever a serial port is opened. It
1499 * enables interrupts for a serial port, linking in its async structure into
1500 * the IRQ chain. It also performs the serial-specific
1501 * initialization for the tty structure.
1502 */
1503 static int
1504 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1505 {
1506 modem_info *info = tty->driver_data;
1507 struct tty_port *port = &info->port;
1508 int retval;
1509
1510 #ifdef ISDN_DEBUG_MODEM_OPEN
1511 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1512 port->count);
1513 #endif
1514 port->count++;
1515 port->tty = tty;
1516 /*
1517 * Start up serial port
1518 */
1519 retval = isdn_tty_startup(info);
1520 if (retval) {
1521 #ifdef ISDN_DEBUG_MODEM_OPEN
1522 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1523 #endif
1524 return retval;
1525 }
1526 retval = tty_port_block_til_ready(port, tty, filp);
1527 if (retval) {
1528 #ifdef ISDN_DEBUG_MODEM_OPEN
1529 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1530 #endif
1531 return retval;
1532 }
1533 #ifdef ISDN_DEBUG_MODEM_OPEN
1534 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1535 #endif
1536 dev->modempoll++;
1537 #ifdef ISDN_DEBUG_MODEM_OPEN
1538 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1539 #endif
1540 return 0;
1541 }
1542
1543 static void
1544 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1545 {
1546 modem_info *info = (modem_info *) tty->driver_data;
1547 struct tty_port *port = &info->port;
1548 ulong timeout;
1549
1550 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1551 return;
1552 if (tty_hung_up_p(filp)) {
1553 #ifdef ISDN_DEBUG_MODEM_OPEN
1554 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1555 #endif
1556 return;
1557 }
1558 if ((tty->count == 1) && (port->count != 1)) {
1559 /*
1560 * Uh, oh. tty->count is 1, which means that the tty
1561 * structure will be freed. Info->count should always
1562 * be one in these conditions. If it's greater than
1563 * one, we've got real problems, since it means the
1564 * serial port won't be shutdown.
1565 */
1566 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1567 "info->count is %d\n", port->count);
1568 port->count = 1;
1569 }
1570 if (--port->count < 0) {
1571 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1572 info->line, port->count);
1573 port->count = 0;
1574 }
1575 if (port->count) {
1576 #ifdef ISDN_DEBUG_MODEM_OPEN
1577 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1578 #endif
1579 return;
1580 }
1581 port->flags |= ASYNC_CLOSING;
1582
1583 tty->closing = 1;
1584 /*
1585 * At this point we stop accepting input. To do this, we
1586 * disable the receive line status interrupts, and tell the
1587 * interrupt driver to stop checking the data ready bit in the
1588 * line status register.
1589 */
1590 if (port->flags & ASYNC_INITIALIZED) {
1591 tty_wait_until_sent_from_close(tty, 3000); /* 30 seconds timeout */
1592 /*
1593 * Before we drop DTR, make sure the UART transmitter
1594 * has completely drained; this is especially
1595 * important if there is a transmit FIFO!
1596 */
1597 timeout = jiffies + HZ;
1598 while (!(info->lsr & UART_LSR_TEMT)) {
1599 schedule_timeout_interruptible(20);
1600 if (time_after(jiffies, timeout))
1601 break;
1602 }
1603 }
1604 dev->modempoll--;
1605 isdn_tty_shutdown(info);
1606 isdn_tty_flush_buffer(tty);
1607 tty_ldisc_flush(tty);
1608 port->tty = NULL;
1609 info->ncarrier = 0;
1610
1611 tty_port_close_end(port, tty);
1612 #ifdef ISDN_DEBUG_MODEM_OPEN
1613 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1614 #endif
1615 }
1616
1617 /*
1618 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1619 */
1620 static void
1621 isdn_tty_hangup(struct tty_struct *tty)
1622 {
1623 modem_info *info = (modem_info *) tty->driver_data;
1624 struct tty_port *port = &info->port;
1625
1626 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1627 return;
1628 isdn_tty_shutdown(info);
1629 port->count = 0;
1630 port->flags &= ~ASYNC_NORMAL_ACTIVE;
1631 port->tty = NULL;
1632 wake_up_interruptible(&port->open_wait);
1633 }
1634
1635 /* This routine initializes all emulator-data.
1636 */
1637 static void
1638 isdn_tty_reset_profile(atemu *m)
1639 {
1640 m->profile[0] = 0;
1641 m->profile[1] = 0;
1642 m->profile[2] = 43;
1643 m->profile[3] = 13;
1644 m->profile[4] = 10;
1645 m->profile[5] = 8;
1646 m->profile[6] = 3;
1647 m->profile[7] = 60;
1648 m->profile[8] = 2;
1649 m->profile[9] = 6;
1650 m->profile[10] = 7;
1651 m->profile[11] = 70;
1652 m->profile[12] = 0x45;
1653 m->profile[13] = 4;
1654 m->profile[14] = ISDN_PROTO_L2_X75I;
1655 m->profile[15] = ISDN_PROTO_L3_TRANS;
1656 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1657 m->profile[17] = ISDN_MODEM_WINSIZE;
1658 m->profile[18] = 4;
1659 m->profile[19] = 0;
1660 m->profile[20] = 0;
1661 m->profile[23] = 0;
1662 m->pmsn[0] = '\0';
1663 m->plmsn[0] = '\0';
1664 }
1665
1666 #ifdef CONFIG_ISDN_AUDIO
1667 static void
1668 isdn_tty_modem_reset_vpar(atemu *m)
1669 {
1670 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1671 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1672 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1673 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1674 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1675 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1676 }
1677 #endif
1678
1679 #ifdef CONFIG_ISDN_TTY_FAX
1680 static void
1681 isdn_tty_modem_reset_faxpar(modem_info *info)
1682 {
1683 T30_s *f = info->fax;
1684
1685 f->code = 0;
1686 f->phase = ISDN_FAX_PHASE_IDLE;
1687 f->direction = 0;
1688 f->resolution = 1; /* fine */
1689 f->rate = 5; /* 14400 bit/s */
1690 f->width = 0;
1691 f->length = 0;
1692 f->compression = 0;
1693 f->ecm = 0;
1694 f->binary = 0;
1695 f->scantime = 0;
1696 memset(&f->id[0], 32, FAXIDLEN - 1);
1697 f->id[FAXIDLEN - 1] = 0;
1698 f->badlin = 0;
1699 f->badmul = 0;
1700 f->bor = 0;
1701 f->nbc = 0;
1702 f->cq = 0;
1703 f->cr = 0;
1704 f->ctcrty = 0;
1705 f->minsp = 0;
1706 f->phcto = 30;
1707 f->rel = 0;
1708 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1709 f->pollid[FAXIDLEN - 1] = 0;
1710 }
1711 #endif
1712
1713 static void
1714 isdn_tty_modem_reset_regs(modem_info *info, int force)
1715 {
1716 atemu *m = &info->emu;
1717 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1718 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1719 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1720 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1721 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1722 }
1723 #ifdef CONFIG_ISDN_AUDIO
1724 isdn_tty_modem_reset_vpar(m);
1725 #endif
1726 #ifdef CONFIG_ISDN_TTY_FAX
1727 isdn_tty_modem_reset_faxpar(info);
1728 #endif
1729 m->mdmcmdl = 0;
1730 }
1731
1732 static void
1733 modem_write_profile(atemu *m)
1734 {
1735 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1736 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1737 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1738 if (dev->profd)
1739 send_sig(SIGIO, dev->profd, 1);
1740 }
1741
1742 static const struct tty_operations modem_ops = {
1743 .install = isdn_tty_install,
1744 .open = isdn_tty_open,
1745 .close = isdn_tty_close,
1746 .write = isdn_tty_write,
1747 .flush_chars = isdn_tty_flush_chars,
1748 .write_room = isdn_tty_write_room,
1749 .chars_in_buffer = isdn_tty_chars_in_buffer,
1750 .flush_buffer = isdn_tty_flush_buffer,
1751 .ioctl = isdn_tty_ioctl,
1752 .throttle = isdn_tty_throttle,
1753 .unthrottle = isdn_tty_unthrottle,
1754 .set_termios = isdn_tty_set_termios,
1755 .hangup = isdn_tty_hangup,
1756 .tiocmget = isdn_tty_tiocmget,
1757 .tiocmset = isdn_tty_tiocmset,
1758 };
1759
1760 static int isdn_tty_carrier_raised(struct tty_port *port)
1761 {
1762 modem_info *info = container_of(port, modem_info, port);
1763 return info->msr & UART_MSR_DCD;
1764 }
1765
1766 static const struct tty_port_operations isdn_tty_port_ops = {
1767 .carrier_raised = isdn_tty_carrier_raised,
1768 };
1769
1770 int
1771 isdn_tty_modem_init(void)
1772 {
1773 isdn_modem_t *m;
1774 int i, retval;
1775 modem_info *info;
1776
1777 m = &dev->mdm;
1778 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1779 if (!m->tty_modem)
1780 return -ENOMEM;
1781 m->tty_modem->name = "ttyI";
1782 m->tty_modem->major = ISDN_TTY_MAJOR;
1783 m->tty_modem->minor_start = 0;
1784 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1785 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1786 m->tty_modem->init_termios = tty_std_termios;
1787 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1788 m->tty_modem->flags = TTY_DRIVER_REAL_RAW;
1789 m->tty_modem->driver_name = "isdn_tty";
1790 tty_set_operations(m->tty_modem, &modem_ops);
1791 retval = tty_register_driver(m->tty_modem);
1792 if (retval) {
1793 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1794 goto err;
1795 }
1796 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1797 info = &m->info[i];
1798 #ifdef CONFIG_ISDN_TTY_FAX
1799 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1800 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1801 retval = -ENOMEM;
1802 goto err_unregister;
1803 }
1804 #endif
1805 tty_port_init(&info->port);
1806 info->port.ops = &isdn_tty_port_ops;
1807 spin_lock_init(&info->readlock);
1808 sprintf(info->last_cause, "0000");
1809 sprintf(info->last_num, "none");
1810 info->last_dir = 0;
1811 info->last_lhup = 1;
1812 info->last_l2 = -1;
1813 info->last_si = 0;
1814 isdn_tty_reset_profile(&info->emu);
1815 isdn_tty_modem_reset_regs(info, 1);
1816 info->magic = ISDN_ASYNC_MAGIC;
1817 info->line = i;
1818 info->x_char = 0;
1819 info->isdn_driver = -1;
1820 info->isdn_channel = -1;
1821 info->drv_index = -1;
1822 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1823 init_timer(&info->nc_timer);
1824 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1825 info->nc_timer.data = (unsigned long) info;
1826 skb_queue_head_init(&info->xmit_queue);
1827 #ifdef CONFIG_ISDN_AUDIO
1828 skb_queue_head_init(&info->dtmf_queue);
1829 #endif
1830 info->port.xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5,
1831 GFP_KERNEL);
1832 if (!info->port.xmit_buf) {
1833 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1834 retval = -ENOMEM;
1835 goto err_unregister;
1836 }
1837 /* Make room for T.70 header */
1838 info->port.xmit_buf += 4;
1839 }
1840 return 0;
1841 err_unregister:
1842 for (i--; i >= 0; i--) {
1843 info = &m->info[i];
1844 #ifdef CONFIG_ISDN_TTY_FAX
1845 kfree(info->fax);
1846 #endif
1847 kfree(info->port.xmit_buf - 4);
1848 info->port.xmit_buf = NULL;
1849 tty_port_destroy(&info->port);
1850 }
1851 tty_unregister_driver(m->tty_modem);
1852 err:
1853 put_tty_driver(m->tty_modem);
1854 m->tty_modem = NULL;
1855 return retval;
1856 }
1857
1858 void
1859 isdn_tty_exit(void)
1860 {
1861 modem_info *info;
1862 int i;
1863
1864 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1865 info = &dev->mdm.info[i];
1866 isdn_tty_cleanup_xmit(info);
1867 #ifdef CONFIG_ISDN_TTY_FAX
1868 kfree(info->fax);
1869 #endif
1870 kfree(info->port.xmit_buf - 4);
1871 info->port.xmit_buf = NULL;
1872 tty_port_destroy(&info->port);
1873 }
1874 tty_unregister_driver(dev->mdm.tty_modem);
1875 put_tty_driver(dev->mdm.tty_modem);
1876 dev->mdm.tty_modem = NULL;
1877 }
1878
1879
1880 /*
1881 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1882 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1883 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1884 */
1885
1886 static int
1887 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1888 {
1889 #ifdef ISDN_DEBUG_MODEM_ICALL
1890 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1891 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1892 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1893 #endif
1894 if (strlen(emu->lmsn)) {
1895 char *p = emu->lmsn;
1896 char *q;
1897 int tmp;
1898 int ret = 0;
1899
1900 while (1) {
1901 if ((q = strchr(p, ';')))
1902 *q = '\0';
1903 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
1904 ret = tmp;
1905 #ifdef ISDN_DEBUG_MODEM_ICALL
1906 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
1907 p, isdn_map_eaz2msn(emu->msn, di), tmp);
1908 #endif
1909 if (q) {
1910 *q = ';';
1911 p = q;
1912 p++;
1913 }
1914 if (!tmp)
1915 return 0;
1916 if (!q)
1917 break;
1918 }
1919 return ret;
1920 } else {
1921 int tmp;
1922 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
1923 #ifdef ISDN_DEBUG_MODEM_ICALL
1924 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
1925 isdn_map_eaz2msn(emu->msn, di), tmp);
1926 #endif
1927 return tmp;
1928 }
1929 }
1930
1931 /*
1932 * An incoming call-request has arrived.
1933 * Search the tty-devices for an appropriate device and bind
1934 * it to the ISDN-Channel.
1935 * Return:
1936 *
1937 * 0 = No matching device found.
1938 * 1 = A matching device found.
1939 * 3 = No match found, but eventually would match, if
1940 * CID is longer.
1941 */
1942 int
1943 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
1944 {
1945 char *eaz;
1946 int i;
1947 int wret;
1948 int idx;
1949 int si1;
1950 int si2;
1951 char *nr;
1952 ulong flags;
1953
1954 if (!setup->phone[0]) {
1955 nr = "0";
1956 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
1957 } else
1958 nr = setup->phone;
1959 si1 = (int) setup->si1;
1960 si2 = (int) setup->si2;
1961 if (!setup->eazmsn[0]) {
1962 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
1963 eaz = "0";
1964 } else
1965 eaz = setup->eazmsn;
1966 #ifdef ISDN_DEBUG_MODEM_ICALL
1967 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
1968 #endif
1969 wret = 0;
1970 spin_lock_irqsave(&dev->lock, flags);
1971 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1972 modem_info *info = &dev->mdm.info[i];
1973
1974 if (info->port.count == 0)
1975 continue;
1976 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
1977 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
1978 idx = isdn_dc2minor(di, ch);
1979 #ifdef ISDN_DEBUG_MODEM_ICALL
1980 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
1981 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
1982 info->port.flags, info->isdn_driver,
1983 info->isdn_channel, dev->usage[idx]);
1984 #endif
1985 if (
1986 #ifndef FIX_FILE_TRANSFER
1987 (info->port.flags & ASYNC_NORMAL_ACTIVE) &&
1988 #endif
1989 (info->isdn_driver == -1) &&
1990 (info->isdn_channel == -1) &&
1991 (USG_NONE(dev->usage[idx]))) {
1992 int matchret;
1993
1994 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
1995 wret = matchret;
1996 if (!matchret) { /* EAZ is matching */
1997 info->isdn_driver = di;
1998 info->isdn_channel = ch;
1999 info->drv_index = idx;
2000 dev->m_idx[idx] = info->line;
2001 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2002 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2003 strcpy(dev->num[idx], nr);
2004 strcpy(info->emu.cpn, eaz);
2005 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2006 info->emu.mdmreg[REG_PLAN] = setup->plan;
2007 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2008 isdn_info_update();
2009 spin_unlock_irqrestore(&dev->lock, flags);
2010 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2011 info->line);
2012 info->msr |= UART_MSR_RI;
2013 isdn_tty_modem_result(RESULT_RING, info);
2014 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2015 return 1;
2016 }
2017 }
2018 }
2019 }
2020 spin_unlock_irqrestore(&dev->lock, flags);
2021 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2022 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2)) ? "rejected" : "ignored");
2023 return (wret == 2) ? 3 : 0;
2024 }
2025
2026 #define TTY_IS_ACTIVE(info) (info->port.flags & ASYNC_NORMAL_ACTIVE)
2027
2028 int
2029 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2030 {
2031 int mi;
2032 modem_info *info;
2033 char *e;
2034
2035 if (i < 0)
2036 return 0;
2037 if ((mi = dev->m_idx[i]) >= 0) {
2038 info = &dev->mdm.info[mi];
2039 switch (c->command) {
2040 case ISDN_STAT_CINF:
2041 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2042 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2043 if (e == (char *)c->parm.num)
2044 info->emu.charge = 0;
2045
2046 break;
2047 case ISDN_STAT_BSENT:
2048 #ifdef ISDN_TTY_STAT_DEBUG
2049 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2050 #endif
2051 if ((info->isdn_driver == c->driver) &&
2052 (info->isdn_channel == c->arg)) {
2053 info->msr |= UART_MSR_CTS;
2054 if (info->send_outstanding)
2055 if (!(--info->send_outstanding))
2056 info->lsr |= UART_LSR_TEMT;
2057 isdn_tty_tint(info);
2058 return 1;
2059 }
2060 break;
2061 case ISDN_STAT_CAUSE:
2062 #ifdef ISDN_TTY_STAT_DEBUG
2063 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2064 #endif
2065 /* Signal cause to tty-device */
2066 strncpy(info->last_cause, c->parm.num, 5);
2067 return 1;
2068 case ISDN_STAT_DISPLAY:
2069 #ifdef ISDN_TTY_STAT_DEBUG
2070 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2071 #endif
2072 /* Signal display to tty-device */
2073 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2074 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2075 isdn_tty_at_cout("\r\n", info);
2076 isdn_tty_at_cout("DISPLAY: ", info);
2077 isdn_tty_at_cout(c->parm.display, info);
2078 isdn_tty_at_cout("\r\n", info);
2079 }
2080 return 1;
2081 case ISDN_STAT_DCONN:
2082 #ifdef ISDN_TTY_STAT_DEBUG
2083 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2084 #endif
2085 if (TTY_IS_ACTIVE(info)) {
2086 if (info->dialing == 1) {
2087 info->dialing = 2;
2088 return 1;
2089 }
2090 }
2091 break;
2092 case ISDN_STAT_DHUP:
2093 #ifdef ISDN_TTY_STAT_DEBUG
2094 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2095 #endif
2096 if (TTY_IS_ACTIVE(info)) {
2097 if (info->dialing == 1)
2098 isdn_tty_modem_result(RESULT_BUSY, info);
2099 if (info->dialing > 1)
2100 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2101 info->dialing = 0;
2102 #ifdef ISDN_DEBUG_MODEM_HUP
2103 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2104 #endif
2105 isdn_tty_modem_hup(info, 0);
2106 return 1;
2107 }
2108 break;
2109 case ISDN_STAT_BCONN:
2110 #ifdef ISDN_TTY_STAT_DEBUG
2111 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2112 #endif
2113 /* Wake up any processes waiting
2114 * for incoming call of this device when
2115 * DCD follow the state of incoming carrier
2116 */
2117 if (info->port.blocked_open &&
2118 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2119 wake_up_interruptible(&info->port.open_wait);
2120 }
2121
2122 /* Schedule CONNECT-Message to any tty
2123 * waiting for it and
2124 * set DCD-bit of its modem-status.
2125 */
2126 if (TTY_IS_ACTIVE(info) ||
2127 (info->port.blocked_open &&
2128 (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2129 info->msr |= UART_MSR_DCD;
2130 info->emu.charge = 0;
2131 if (info->dialing & 0xf)
2132 info->last_dir = 1;
2133 else
2134 info->last_dir = 0;
2135 info->dialing = 0;
2136 info->rcvsched = 1;
2137 if (USG_MODEM(dev->usage[i])) {
2138 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2139 strcpy(info->emu.connmsg, c->parm.num);
2140 isdn_tty_modem_result(RESULT_CONNECT, info);
2141 } else
2142 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2143 }
2144 if (USG_VOICE(dev->usage[i]))
2145 isdn_tty_modem_result(RESULT_VCON, info);
2146 return 1;
2147 }
2148 break;
2149 case ISDN_STAT_BHUP:
2150 #ifdef ISDN_TTY_STAT_DEBUG
2151 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2152 #endif
2153 if (TTY_IS_ACTIVE(info)) {
2154 #ifdef ISDN_DEBUG_MODEM_HUP
2155 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2156 #endif
2157 isdn_tty_modem_hup(info, 0);
2158 return 1;
2159 }
2160 break;
2161 case ISDN_STAT_NODCH:
2162 #ifdef ISDN_TTY_STAT_DEBUG
2163 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2164 #endif
2165 if (TTY_IS_ACTIVE(info)) {
2166 if (info->dialing) {
2167 info->dialing = 0;
2168 info->last_l2 = -1;
2169 info->last_si = 0;
2170 sprintf(info->last_cause, "0000");
2171 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2172 }
2173 isdn_tty_modem_hup(info, 0);
2174 return 1;
2175 }
2176 break;
2177 case ISDN_STAT_UNLOAD:
2178 #ifdef ISDN_TTY_STAT_DEBUG
2179 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2180 #endif
2181 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2182 info = &dev->mdm.info[i];
2183 if (info->isdn_driver == c->driver) {
2184 if (info->online)
2185 isdn_tty_modem_hup(info, 1);
2186 }
2187 }
2188 return 1;
2189 #ifdef CONFIG_ISDN_TTY_FAX
2190 case ISDN_STAT_FAXIND:
2191 if (TTY_IS_ACTIVE(info)) {
2192 isdn_tty_fax_command(info, c);
2193 }
2194 break;
2195 #endif
2196 #ifdef CONFIG_ISDN_AUDIO
2197 case ISDN_STAT_AUDIO:
2198 if (TTY_IS_ACTIVE(info)) {
2199 switch (c->parm.num[0]) {
2200 case ISDN_AUDIO_DTMF:
2201 if (info->vonline) {
2202 isdn_audio_put_dle_code(info,
2203 c->parm.num[1]);
2204 }
2205 break;
2206 }
2207 }
2208 break;
2209 #endif
2210 }
2211 }
2212 return 0;
2213 }
2214
2215 /*********************************************************************
2216 Modem-Emulator-Routines
2217 *********************************************************************/
2218
2219 #define cmdchar(c) ((c >= ' ') && (c <= 0x7f))
2220
2221 /*
2222 * Put a message from the AT-emulator into receive-buffer of tty,
2223 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2224 */
2225 void
2226 isdn_tty_at_cout(char *msg, modem_info *info)
2227 {
2228 struct tty_port *port = &info->port;
2229 atemu *m = &info->emu;
2230 char *p;
2231 char c;
2232 u_long flags;
2233 struct sk_buff *skb = NULL;
2234 char *sp = NULL;
2235 int l;
2236
2237 if (!msg) {
2238 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2239 return;
2240 }
2241
2242 l = strlen(msg);
2243
2244 spin_lock_irqsave(&info->readlock, flags);
2245 if (port->flags & ASYNC_CLOSING) {
2246 spin_unlock_irqrestore(&info->readlock, flags);
2247 return;
2248 }
2249
2250 /* use queue instead of direct, if online and */
2251 /* data is in queue or buffer is full */
2252 if (info->online && ((tty_buffer_request_room(port, l) < l) ||
2253 !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2254 skb = alloc_skb(l, GFP_ATOMIC);
2255 if (!skb) {
2256 spin_unlock_irqrestore(&info->readlock, flags);
2257 return;
2258 }
2259 sp = skb_put(skb, l);
2260 #ifdef CONFIG_ISDN_AUDIO
2261 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2262 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2263 #endif
2264 }
2265
2266 for (p = msg; *p; p++) {
2267 switch (*p) {
2268 case '\r':
2269 c = m->mdmreg[REG_CR];
2270 break;
2271 case '\n':
2272 c = m->mdmreg[REG_LF];
2273 break;
2274 case '\b':
2275 c = m->mdmreg[REG_BS];
2276 break;
2277 default:
2278 c = *p;
2279 }
2280 if (skb) {
2281 *sp++ = c;
2282 } else {
2283 if (tty_insert_flip_char(port, c, TTY_NORMAL) == 0)
2284 break;
2285 }
2286 }
2287 if (skb) {
2288 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2289 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2290 spin_unlock_irqrestore(&info->readlock, flags);
2291 /* Schedule dequeuing */
2292 if (dev->modempoll && info->rcvsched)
2293 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2294
2295 } else {
2296 spin_unlock_irqrestore(&info->readlock, flags);
2297 tty_flip_buffer_push(port);
2298 }
2299 }
2300
2301 /*
2302 * Perform ATH Hangup
2303 */
2304 static void
2305 isdn_tty_on_hook(modem_info *info)
2306 {
2307 if (info->isdn_channel >= 0) {
2308 #ifdef ISDN_DEBUG_MODEM_HUP
2309 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2310 #endif
2311 isdn_tty_modem_hup(info, 1);
2312 }
2313 }
2314
2315 static void
2316 isdn_tty_off_hook(void)
2317 {
2318 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2319 }
2320
2321 #define PLUSWAIT1 (HZ / 2) /* 0.5 sec. */
2322 #define PLUSWAIT2 (HZ * 3 / 2) /* 1.5 sec */
2323
2324 /*
2325 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2326 * isdn_tty_modem_escape() if sequence found.
2327 *
2328 * Parameters:
2329 * p pointer to databuffer
2330 * plus escape-character
2331 * count length of buffer
2332 * pluscount count of valid escape-characters so far
2333 * lastplus timestamp of last character
2334 */
2335 static void
2336 isdn_tty_check_esc(const u_char *p, u_char plus, int count, int *pluscount,
2337 u_long *lastplus)
2338 {
2339 if (plus > 127)
2340 return;
2341 if (count > 3) {
2342 p += count - 3;
2343 count = 3;
2344 *pluscount = 0;
2345 }
2346 while (count > 0) {
2347 if (*(p++) == plus) {
2348 if ((*pluscount)++) {
2349 /* Time since last '+' > 0.5 sec. ? */
2350 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2351 *pluscount = 1;
2352 } else {
2353 /* Time since last non-'+' < 1.5 sec. ? */
2354 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2355 *pluscount = 0;
2356 }
2357 if ((*pluscount == 3) && (count == 1))
2358 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2359 if (*pluscount > 3)
2360 *pluscount = 1;
2361 } else
2362 *pluscount = 0;
2363 *lastplus = jiffies;
2364 count--;
2365 }
2366 }
2367
2368 /*
2369 * Return result of AT-emulator to tty-receive-buffer, depending on
2370 * modem-register 12, bit 0 and 1.
2371 * For CONNECT-messages also switch to online-mode.
2372 * For RING-message handle auto-ATA if register 0 != 0
2373 */
2374
2375 static void
2376 isdn_tty_modem_result(int code, modem_info *info)
2377 {
2378 atemu *m = &info->emu;
2379 static char *msg[] =
2380 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2381 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2382 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2383 char s[ISDN_MSNLEN + 10];
2384
2385 switch (code) {
2386 case RESULT_RING:
2387 m->mdmreg[REG_RINGCNT]++;
2388 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2389 /* Automatically accept incoming call */
2390 isdn_tty_cmd_ATA(info);
2391 break;
2392 case RESULT_NO_CARRIER:
2393 #ifdef ISDN_DEBUG_MODEM_HUP
2394 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2395 (info->port.flags & ASYNC_CLOSING),
2396 (!info->port.tty));
2397 #endif
2398 m->mdmreg[REG_RINGCNT] = 0;
2399 del_timer(&info->nc_timer);
2400 info->ncarrier = 0;
2401 if ((info->port.flags & ASYNC_CLOSING) || (!info->port.tty))
2402 return;
2403
2404 #ifdef CONFIG_ISDN_AUDIO
2405 if (info->vonline & 1) {
2406 #ifdef ISDN_DEBUG_MODEM_VOICE
2407 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2408 info->line);
2409 #endif
2410 /* voice-recording, add DLE-ETX */
2411 isdn_tty_at_cout("\020\003", info);
2412 }
2413 if (info->vonline & 2) {
2414 #ifdef ISDN_DEBUG_MODEM_VOICE
2415 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2416 info->line);
2417 #endif
2418 /* voice-playing, add DLE-DC4 */
2419 isdn_tty_at_cout("\020\024", info);
2420 }
2421 #endif
2422 break;
2423 case RESULT_CONNECT:
2424 case RESULT_CONNECT64000:
2425 sprintf(info->last_cause, "0000");
2426 if (!info->online)
2427 info->online = 2;
2428 break;
2429 case RESULT_VCON:
2430 #ifdef ISDN_DEBUG_MODEM_VOICE
2431 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2432 info->line);
2433 #endif
2434 sprintf(info->last_cause, "0000");
2435 if (!info->online)
2436 info->online = 1;
2437 break;
2438 } /* switch (code) */
2439
2440 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2441 /* Show results */
2442 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2443 /* Show numeric results only */
2444 sprintf(s, "\r\n%d\r\n", code);
2445 isdn_tty_at_cout(s, info);
2446 } else {
2447 if (code == RESULT_RING) {
2448 /* return if "show RUNG" and ringcounter>1 */
2449 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2450 (m->mdmreg[REG_RINGCNT] > 1))
2451 return;
2452 /* print CID, _before_ _every_ ring */
2453 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2454 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2455 isdn_tty_at_cout(dev->num[info->drv_index], info);
2456 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2457 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2458 isdn_tty_at_cout(info->emu.cpn, info);
2459 }
2460 }
2461 }
2462 isdn_tty_at_cout("\r\n", info);
2463 isdn_tty_at_cout(msg[code], info);
2464 switch (code) {
2465 case RESULT_CONNECT:
2466 switch (m->mdmreg[REG_L2PROT]) {
2467 case ISDN_PROTO_L2_MODEM:
2468 isdn_tty_at_cout(" ", info);
2469 isdn_tty_at_cout(m->connmsg, info);
2470 break;
2471 }
2472 break;
2473 case RESULT_RING:
2474 /* Append CPN, if enabled */
2475 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2476 sprintf(s, "/%s", m->cpn);
2477 isdn_tty_at_cout(s, info);
2478 }
2479 /* Print CID only once, _after_ 1st RING */
2480 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2481 (m->mdmreg[REG_RINGCNT] == 1)) {
2482 isdn_tty_at_cout("\r\n", info);
2483 isdn_tty_at_cout("CALLER NUMBER: ", info);
2484 isdn_tty_at_cout(dev->num[info->drv_index], info);
2485 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2486 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2487 isdn_tty_at_cout(info->emu.cpn, info);
2488 }
2489 }
2490 break;
2491 case RESULT_NO_CARRIER:
2492 case RESULT_NO_DIALTONE:
2493 case RESULT_BUSY:
2494 case RESULT_NO_ANSWER:
2495 m->mdmreg[REG_RINGCNT] = 0;
2496 /* Append Cause-Message if enabled */
2497 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2498 sprintf(s, "/%s", info->last_cause);
2499 isdn_tty_at_cout(s, info);
2500 }
2501 break;
2502 case RESULT_CONNECT64000:
2503 /* Append Protocol to CONNECT message */
2504 switch (m->mdmreg[REG_L2PROT]) {
2505 case ISDN_PROTO_L2_X75I:
2506 case ISDN_PROTO_L2_X75UI:
2507 case ISDN_PROTO_L2_X75BUI:
2508 isdn_tty_at_cout("/X.75", info);
2509 break;
2510 case ISDN_PROTO_L2_HDLC:
2511 isdn_tty_at_cout("/HDLC", info);
2512 break;
2513 case ISDN_PROTO_L2_V11096:
2514 isdn_tty_at_cout("/V110/9600", info);
2515 break;
2516 case ISDN_PROTO_L2_V11019:
2517 isdn_tty_at_cout("/V110/19200", info);
2518 break;
2519 case ISDN_PROTO_L2_V11038:
2520 isdn_tty_at_cout("/V110/38400", info);
2521 break;
2522 }
2523 if (m->mdmreg[REG_T70] & BIT_T70) {
2524 isdn_tty_at_cout("/T.70", info);
2525 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2526 isdn_tty_at_cout("+", info);
2527 }
2528 break;
2529 }
2530 isdn_tty_at_cout("\r\n", info);
2531 }
2532 }
2533 if (code == RESULT_NO_CARRIER) {
2534 if ((info->port.flags & ASYNC_CLOSING) || (!info->port.tty))
2535 return;
2536
2537 if (info->port.flags & ASYNC_CHECK_CD)
2538 tty_hangup(info->port.tty);
2539 }
2540 }
2541
2542
2543 /*
2544 * Display a modem-register-value.
2545 */
2546 static void
2547 isdn_tty_show_profile(int ridx, modem_info *info)
2548 {
2549 char v[6];
2550
2551 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2552 isdn_tty_at_cout(v, info);
2553 }
2554
2555 /*
2556 * Get MSN-string from char-pointer, set pointer to end of number
2557 */
2558 static void
2559 isdn_tty_get_msnstr(char *n, char **p)
2560 {
2561 int limit = ISDN_MSNLEN - 1;
2562
2563 while (((*p[0] >= '0' && *p[0] <= '9') ||
2564 /* Why a comma ??? */
2565 (*p[0] == ',') || (*p[0] == ':')) &&
2566 (limit--))
2567 *n++ = *p[0]++;
2568 *n = '\0';
2569 }
2570
2571 /*
2572 * Get phone-number from modem-commandbuffer
2573 */
2574 static void
2575 isdn_tty_getdial(char *p, char *q, int cnt)
2576 {
2577 int first = 1;
2578 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
2579 buffer overflow */
2580
2581 while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt > 0) {
2582 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2583 ((*p == 'R') && first) ||
2584 (*p == '*') || (*p == '#')) {
2585 *q++ = *p;
2586 limit--;
2587 }
2588 if (!limit)
2589 break;
2590 p++;
2591 first = 0;
2592 }
2593 *q = 0;
2594 }
2595
2596 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2597 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2598
2599 static void
2600 isdn_tty_report(modem_info *info)
2601 {
2602 atemu *m = &info->emu;
2603 char s[80];
2604
2605 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2606 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2607 isdn_tty_at_cout(s, info);
2608 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2609 isdn_tty_at_cout(s, info);
2610 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2611 switch (info->last_l2) {
2612 case ISDN_PROTO_L2_X75I:
2613 isdn_tty_at_cout("X.75i", info);
2614 break;
2615 case ISDN_PROTO_L2_X75UI:
2616 isdn_tty_at_cout("X.75ui", info);
2617 break;
2618 case ISDN_PROTO_L2_X75BUI:
2619 isdn_tty_at_cout("X.75bui", info);
2620 break;
2621 case ISDN_PROTO_L2_HDLC:
2622 isdn_tty_at_cout("HDLC", info);
2623 break;
2624 case ISDN_PROTO_L2_V11096:
2625 isdn_tty_at_cout("V.110 9600 Baud", info);
2626 break;
2627 case ISDN_PROTO_L2_V11019:
2628 isdn_tty_at_cout("V.110 19200 Baud", info);
2629 break;
2630 case ISDN_PROTO_L2_V11038:
2631 isdn_tty_at_cout("V.110 38400 Baud", info);
2632 break;
2633 case ISDN_PROTO_L2_TRANS:
2634 isdn_tty_at_cout("transparent", info);
2635 break;
2636 case ISDN_PROTO_L2_MODEM:
2637 isdn_tty_at_cout("modem", info);
2638 break;
2639 case ISDN_PROTO_L2_FAX:
2640 isdn_tty_at_cout("fax", info);
2641 break;
2642 default:
2643 isdn_tty_at_cout("unknown", info);
2644 break;
2645 }
2646 if (m->mdmreg[REG_T70] & BIT_T70) {
2647 isdn_tty_at_cout("/T.70", info);
2648 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2649 isdn_tty_at_cout("+", info);
2650 }
2651 isdn_tty_at_cout("\r\n", info);
2652 isdn_tty_at_cout(" Service: ", info);
2653 switch (info->last_si) {
2654 case 1:
2655 isdn_tty_at_cout("audio\r\n", info);
2656 break;
2657 case 5:
2658 isdn_tty_at_cout("btx\r\n", info);
2659 break;
2660 case 7:
2661 isdn_tty_at_cout("data\r\n", info);
2662 break;
2663 default:
2664 sprintf(s, "%d\r\n", info->last_si);
2665 isdn_tty_at_cout(s, info);
2666 break;
2667 }
2668 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2669 isdn_tty_at_cout(s, info);
2670 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2671 isdn_tty_at_cout(s, info);
2672 }
2673
2674 /*
2675 * Parse AT&.. commands.
2676 */
2677 static int
2678 isdn_tty_cmd_ATand(char **p, modem_info *info)
2679 {
2680 atemu *m = &info->emu;
2681 int i;
2682 char rb[100];
2683
2684 #define MAXRB (sizeof(rb) - 1)
2685
2686 switch (*p[0]) {
2687 case 'B':
2688 /* &B - Set Buffersize */
2689 p[0]++;
2690 i = isdn_getnum(p);
2691 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2692 PARSE_ERROR1;
2693 #ifdef CONFIG_ISDN_AUDIO
2694 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2695 PARSE_ERROR1;
2696 #endif
2697 m->mdmreg[REG_PSIZE] = i / 16;
2698 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2699 switch (m->mdmreg[REG_L2PROT]) {
2700 case ISDN_PROTO_L2_V11096:
2701 case ISDN_PROTO_L2_V11019:
2702 case ISDN_PROTO_L2_V11038:
2703 info->xmit_size /= 10;
2704 }
2705 break;
2706 case 'C':
2707 /* &C - DCD Status */
2708 p[0]++;
2709 switch (isdn_getnum(p)) {
2710 case 0:
2711 m->mdmreg[REG_DCD] &= ~BIT_DCD;
2712 break;
2713 case 1:
2714 m->mdmreg[REG_DCD] |= BIT_DCD;
2715 break;
2716 default:
2717 PARSE_ERROR1
2718 }
2719 break;
2720 case 'D':
2721 /* &D - Set DTR-Low-behavior */
2722 p[0]++;
2723 switch (isdn_getnum(p)) {
2724 case 0:
2725 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2726 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2727 break;
2728 case 2:
2729 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2730 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2731 break;
2732 case 3:
2733 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2734 m->mdmreg[REG_DTRR] |= BIT_DTRR;
2735 break;
2736 default:
2737 PARSE_ERROR1
2738 }
2739 break;
2740 case 'E':
2741 /* &E -Set EAZ/MSN */
2742 p[0]++;
2743 isdn_tty_get_msnstr(m->msn, p);
2744 break;
2745 case 'F':
2746 /* &F -Set Factory-Defaults */
2747 p[0]++;
2748 if (info->msr & UART_MSR_DCD)
2749 PARSE_ERROR1;
2750 isdn_tty_reset_profile(m);
2751 isdn_tty_modem_reset_regs(info, 1);
2752 break;
2753 #ifdef DUMMY_HAYES_AT
2754 case 'K':
2755 /* only for be compilant with common scripts */
2756 /* &K Flowcontrol - no function */
2757 p[0]++;
2758 isdn_getnum(p);
2759 break;
2760 #endif
2761 case 'L':
2762 /* &L -Set Numbers to listen on */
2763 p[0]++;
2764 i = 0;
2765 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2766 (i < ISDN_LMSNLEN - 1))
2767 m->lmsn[i++] = *p[0]++;
2768 m->lmsn[i] = '\0';
2769 break;
2770 case 'R':
2771 /* &R - Set V.110 bitrate adaption */
2772 p[0]++;
2773 i = isdn_getnum(p);
2774 switch (i) {
2775 case 0:
2776 /* Switch off V.110, back to X.75 */
2777 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2778 m->mdmreg[REG_SI2] = 0;
2779 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2780 break;
2781 case 9600:
2782 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2783 m->mdmreg[REG_SI2] = 197;
2784 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2785 break;
2786 case 19200:
2787 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2788 m->mdmreg[REG_SI2] = 199;
2789 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2790 break;
2791 case 38400:
2792 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2793 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2794 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2795 break;
2796 default:
2797 PARSE_ERROR1;
2798 }
2799 /* Switch off T.70 */
2800 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2801 /* Set Service 7 */
2802 m->mdmreg[REG_SI1] |= 4;
2803 break;
2804 case 'S':
2805 /* &S - Set Windowsize */
2806 p[0]++;
2807 i = isdn_getnum(p);
2808 if ((i > 0) && (i < 9))
2809 m->mdmreg[REG_WSIZE] = i;
2810 else
2811 PARSE_ERROR1;
2812 break;
2813 case 'V':
2814 /* &V - Show registers */
2815 p[0]++;
2816 isdn_tty_at_cout("\r\n", info);
2817 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2818 sprintf(rb, "S%02d=%03d%s", i,
2819 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2820 isdn_tty_at_cout(rb, info);
2821 }
2822 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2823 strlen(m->msn) ? m->msn : "None");
2824 isdn_tty_at_cout(rb, info);
2825 if (strlen(m->lmsn)) {
2826 isdn_tty_at_cout("\r\nListen: ", info);
2827 isdn_tty_at_cout(m->lmsn, info);
2828 isdn_tty_at_cout("\r\n", info);
2829 }
2830 break;
2831 case 'W':
2832 /* &W - Write Profile */
2833 p[0]++;
2834 switch (*p[0]) {
2835 case '0':
2836 p[0]++;
2837 modem_write_profile(m);
2838 break;
2839 default:
2840 PARSE_ERROR1;
2841 }
2842 break;
2843 case 'X':
2844 /* &X - Switch to BTX-Mode and T.70 */
2845 p[0]++;
2846 switch (isdn_getnum(p)) {
2847 case 0:
2848 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2849 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2850 break;
2851 case 1:
2852 m->mdmreg[REG_T70] |= BIT_T70;
2853 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2854 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2855 info->xmit_size = 112;
2856 m->mdmreg[REG_SI1] = 4;
2857 m->mdmreg[REG_SI2] = 0;
2858 break;
2859 case 2:
2860 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2861 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2862 info->xmit_size = 112;
2863 m->mdmreg[REG_SI1] = 4;
2864 m->mdmreg[REG_SI2] = 0;
2865 break;
2866 default:
2867 PARSE_ERROR1;
2868 }
2869 break;
2870 default:
2871 PARSE_ERROR1;
2872 }
2873 return 0;
2874 }
2875
2876 static int
2877 isdn_tty_check_ats(int mreg, int mval, modem_info *info, atemu *m)
2878 {
2879 /* Some plausibility checks */
2880 switch (mreg) {
2881 case REG_L2PROT:
2882 if (mval > ISDN_PROTO_L2_MAX)
2883 return 1;
2884 break;
2885 case REG_PSIZE:
2886 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2887 return 1;
2888 #ifdef CONFIG_ISDN_AUDIO
2889 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
2890 return 1;
2891 #endif
2892 info->xmit_size = mval * 16;
2893 switch (m->mdmreg[REG_L2PROT]) {
2894 case ISDN_PROTO_L2_V11096:
2895 case ISDN_PROTO_L2_V11019:
2896 case ISDN_PROTO_L2_V11038:
2897 info->xmit_size /= 10;
2898 }
2899 break;
2900 case REG_SI1I:
2901 case REG_PLAN:
2902 case REG_SCREEN:
2903 /* readonly registers */
2904 return 1;
2905 }
2906 return 0;
2907 }
2908
2909 /*
2910 * Perform ATS command
2911 */
2912 static int
2913 isdn_tty_cmd_ATS(char **p, modem_info *info)
2914 {
2915 atemu *m = &info->emu;
2916 int bitpos;
2917 int mreg;
2918 int mval;
2919 int bval;
2920
2921 mreg = isdn_getnum(p);
2922 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
2923 PARSE_ERROR1;
2924 switch (*p[0]) {
2925 case '=':
2926 p[0]++;
2927 mval = isdn_getnum(p);
2928 if (mval < 0 || mval > 255)
2929 PARSE_ERROR1;
2930 if (isdn_tty_check_ats(mreg, mval, info, m))
2931 PARSE_ERROR1;
2932 m->mdmreg[mreg] = mval;
2933 break;
2934 case '.':
2935 /* Set/Clear a single bit */
2936 p[0]++;
2937 bitpos = isdn_getnum(p);
2938 if ((bitpos < 0) || (bitpos > 7))
2939 PARSE_ERROR1;
2940 switch (*p[0]) {
2941 case '=':
2942 p[0]++;
2943 bval = isdn_getnum(p);
2944 if (bval < 0 || bval > 1)
2945 PARSE_ERROR1;
2946 if (bval)
2947 mval = m->mdmreg[mreg] | (1 << bitpos);
2948 else
2949 mval = m->mdmreg[mreg] & ~(1 << bitpos);
2950 if (isdn_tty_check_ats(mreg, mval, info, m))
2951 PARSE_ERROR1;
2952 m->mdmreg[mreg] = mval;
2953 break;
2954 case '?':
2955 p[0]++;
2956 isdn_tty_at_cout("\r\n", info);
2957 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
2958 info);
2959 break;
2960 default:
2961 PARSE_ERROR1;
2962 }
2963 break;
2964 case '?':
2965 p[0]++;
2966 isdn_tty_show_profile(mreg, info);
2967 break;
2968 default:
2969 PARSE_ERROR1;
2970 break;
2971 }
2972 return 0;
2973 }
2974
2975 /*
2976 * Perform ATA command
2977 */
2978 static void
2979 isdn_tty_cmd_ATA(modem_info *info)
2980 {
2981 atemu *m = &info->emu;
2982 isdn_ctrl cmd;
2983 int l2;
2984
2985 if (info->msr & UART_MSR_RI) {
2986 /* Accept incoming call */
2987 info->last_dir = 0;
2988 strcpy(info->last_num, dev->num[info->drv_index]);
2989 m->mdmreg[REG_RINGCNT] = 0;
2990 info->msr &= ~UART_MSR_RI;
2991 l2 = m->mdmreg[REG_L2PROT];
2992 #ifdef CONFIG_ISDN_AUDIO
2993 /* If more than one bit set in reg18, autoselect Layer2 */
2994 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
2995 if (m->mdmreg[REG_SI1I] == 1) {
2996 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
2997 l2 = ISDN_PROTO_L2_TRANS;
2998 } else
2999 l2 = ISDN_PROTO_L2_X75I;
3000 }
3001 #endif
3002 cmd.driver = info->isdn_driver;
3003 cmd.command = ISDN_CMD_SETL2;
3004 cmd.arg = info->isdn_channel + (l2 << 8);
3005 info->last_l2 = l2;
3006 isdn_command(&cmd);
3007 cmd.driver = info->isdn_driver;
3008 cmd.command = ISDN_CMD_SETL3;
3009 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3010 #ifdef CONFIG_ISDN_TTY_FAX
3011 if (l2 == ISDN_PROTO_L2_FAX) {
3012 cmd.parm.fax = info->fax;
3013 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3014 }
3015 #endif
3016 isdn_command(&cmd);
3017 cmd.driver = info->isdn_driver;
3018 cmd.arg = info->isdn_channel;
3019 cmd.command = ISDN_CMD_ACCEPTD;
3020 info->dialing = 16;
3021 info->emu.carrierwait = 0;
3022 isdn_command(&cmd);
3023 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3024 } else
3025 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3026 }
3027
3028 #ifdef CONFIG_ISDN_AUDIO
3029 /*
3030 * Parse AT+F.. commands
3031 */
3032 static int
3033 isdn_tty_cmd_PLUSF(char **p, modem_info *info)
3034 {
3035 atemu *m = &info->emu;
3036 char rs[20];
3037
3038 if (!strncmp(p[0], "CLASS", 5)) {
3039 p[0] += 5;
3040 switch (*p[0]) {
3041 case '?':
3042 p[0]++;
3043 sprintf(rs, "\r\n%d",
3044 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3045 #ifdef CONFIG_ISDN_TTY_FAX
3046 if (TTY_IS_FCLASS2(info))
3047 sprintf(rs, "\r\n2");
3048 else if (TTY_IS_FCLASS1(info))
3049 sprintf(rs, "\r\n1");
3050 #endif
3051 isdn_tty_at_cout(rs, info);
3052 break;
3053 case '=':
3054 p[0]++;
3055 switch (*p[0]) {
3056 case '0':
3057 p[0]++;
3058 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3059 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3060 m->mdmreg[REG_SI1] = 4;
3061 info->xmit_size =
3062 m->mdmreg[REG_PSIZE] * 16;
3063 break;
3064 #ifdef CONFIG_ISDN_TTY_FAX
3065 case '1':
3066 p[0]++;
3067 if (!(dev->global_features &
3068 ISDN_FEATURE_L3_FCLASS1))
3069 PARSE_ERROR1;
3070 m->mdmreg[REG_SI1] = 1;
3071 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3072 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3073 info->xmit_size =
3074 m->mdmreg[REG_PSIZE] * 16;
3075 break;
3076 case '2':
3077 p[0]++;
3078 if (!(dev->global_features &
3079 ISDN_FEATURE_L3_FCLASS2))
3080 PARSE_ERROR1;
3081 m->mdmreg[REG_SI1] = 1;
3082 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3083 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3084 info->xmit_size =
3085 m->mdmreg[REG_PSIZE] * 16;
3086 break;
3087 #endif
3088 case '8':
3089 p[0]++;
3090 /* L2 will change on dialout with si=1 */
3091 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3092 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3093 m->mdmreg[REG_SI1] = 5;
3094 info->xmit_size = VBUF;
3095 break;
3096 case '?':
3097 p[0]++;
3098 strcpy(rs, "\r\n0,");
3099 #ifdef CONFIG_ISDN_TTY_FAX
3100 if (dev->global_features &
3101 ISDN_FEATURE_L3_FCLASS1)
3102 strcat(rs, "1,");
3103 if (dev->global_features &
3104 ISDN_FEATURE_L3_FCLASS2)
3105 strcat(rs, "2,");
3106 #endif
3107 strcat(rs, "8");
3108 isdn_tty_at_cout(rs, info);
3109 break;
3110 default:
3111 PARSE_ERROR1;
3112 }
3113 break;
3114 default:
3115 PARSE_ERROR1;
3116 }
3117 return 0;
3118 }
3119 #ifdef CONFIG_ISDN_TTY_FAX
3120 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3121 #else
3122 PARSE_ERROR1;
3123 #endif
3124 }
3125
3126 /*
3127 * Parse AT+V.. commands
3128 */
3129 static int
3130 isdn_tty_cmd_PLUSV(char **p, modem_info *info)
3131 {
3132 atemu *m = &info->emu;
3133 isdn_ctrl cmd;
3134 static char *vcmd[] =
3135 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3136 int i;
3137 int par1;
3138 int par2;
3139 char rs[20];
3140
3141 i = 0;
3142 while (vcmd[i]) {
3143 if (!strncmp(vcmd[i], p[0], 2)) {
3144 p[0] += 2;
3145 break;
3146 }
3147 i++;
3148 }
3149 switch (i) {
3150 case 0:
3151 /* AT+VNH - Auto hangup feature */
3152 switch (*p[0]) {
3153 case '?':
3154 p[0]++;
3155 isdn_tty_at_cout("\r\n1", info);
3156 break;
3157 case '=':
3158 p[0]++;
3159 switch (*p[0]) {
3160 case '1':
3161 p[0]++;
3162 break;
3163 case '?':
3164 p[0]++;
3165 isdn_tty_at_cout("\r\n1", info);
3166 break;
3167 default:
3168 PARSE_ERROR1;
3169 }
3170 break;
3171 default:
3172 PARSE_ERROR1;
3173 }
3174 break;
3175 case 1:
3176 /* AT+VIP - Reset all voice parameters */
3177 isdn_tty_modem_reset_vpar(m);
3178 break;
3179 case 2:
3180 /* AT+VLS - Select device, accept incoming call */
3181 switch (*p[0]) {
3182 case '?':
3183 p[0]++;
3184 sprintf(rs, "\r\n%d", m->vpar[0]);
3185 isdn_tty_at_cout(rs, info);
3186 break;
3187 case '=':
3188 p[0]++;
3189 switch (*p[0]) {
3190 case '0':
3191 p[0]++;
3192 m->vpar[0] = 0;
3193 break;
3194 case '2':
3195 p[0]++;
3196 m->vpar[0] = 2;
3197 break;
3198 case '?':
3199 p[0]++;
3200 isdn_tty_at_cout("\r\n0,2", info);
3201 break;
3202 default:
3203 PARSE_ERROR1;
3204 }
3205 break;
3206 default:
3207 PARSE_ERROR1;
3208 }
3209 break;
3210 case 3:
3211 /* AT+VRX - Start recording */
3212 if (!m->vpar[0])
3213 PARSE_ERROR1;
3214 if (info->online != 1) {
3215 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3216 return 1;
3217 }
3218 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3219 if (!info->dtmf_state) {
3220 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3221 PARSE_ERROR1;
3222 }
3223 info->silence_state = isdn_audio_silence_init(info->silence_state);
3224 if (!info->silence_state) {
3225 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3226 PARSE_ERROR1;
3227 }
3228 if (m->vpar[3] < 5) {
3229 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3230 if (!info->adpcmr) {
3231 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3232 PARSE_ERROR1;
3233 }
3234 }
3235 #ifdef ISDN_DEBUG_AT
3236 printk(KERN_DEBUG "AT: +VRX\n");
3237 #endif
3238 info->vonline |= 1;
3239 isdn_tty_modem_result(RESULT_CONNECT, info);
3240 return 0;
3241 break;
3242 case 4:
3243 /* AT+VSD - Silence detection */
3244 switch (*p[0]) {
3245 case '?':
3246 p[0]++;
3247 sprintf(rs, "\r\n<%d>,<%d>",
3248 m->vpar[1],
3249 m->vpar[2]);
3250 isdn_tty_at_cout(rs, info);
3251 break;
3252 case '=':
3253 p[0]++;
3254 if ((*p[0] >= '0') && (*p[0] <= '9')) {
3255 par1 = isdn_getnum(p);
3256 if ((par1 < 0) || (par1 > 31))
3257 PARSE_ERROR1;
3258 if (*p[0] != ',')
3259 PARSE_ERROR1;
3260 p[0]++;
3261 par2 = isdn_getnum(p);
3262 if ((par2 < 0) || (par2 > 255))
3263 PARSE_ERROR1;
3264 m->vpar[1] = par1;
3265 m->vpar[2] = par2;
3266 break;
3267 } else
3268 if (*p[0] == '?') {
3269 p[0]++;
3270 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3271 info);
3272 break;
3273 } else
3274 PARSE_ERROR1;
3275 break;
3276 default:
3277 PARSE_ERROR1;
3278 }
3279 break;
3280 case 5:
3281 /* AT+VSM - Select compression */
3282 switch (*p[0]) {
3283 case '?':
3284 p[0]++;
3285 sprintf(rs, "\r\n<%d>,<%d><8000>",
3286 m->vpar[3],
3287 m->vpar[1]);
3288 isdn_tty_at_cout(rs, info);
3289 break;
3290 case '=':
3291 p[0]++;
3292 switch (*p[0]) {
3293 case '2':
3294 case '3':
3295 case '4':
3296 case '5':
3297 case '6':
3298 par1 = isdn_getnum(p);
3299 if ((par1 < 2) || (par1 > 6))
3300 PARSE_ERROR1;
3301 m->vpar[3] = par1;
3302 break;
3303 case '?':
3304 p[0]++;
3305 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3306 info);
3307 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3308 info);
3309 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3310 info);
3311 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3312 info);
3313 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3314 info);
3315 break;
3316 default:
3317 PARSE_ERROR1;
3318 }
3319 break;
3320 default:
3321 PARSE_ERROR1;
3322 }
3323 break;
3324 case 6:
3325 /* AT+VTX - Start sending */
3326 if (!m->vpar[0])
3327 PARSE_ERROR1;
3328 if (info->online != 1) {
3329 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3330 return 1;
3331 }
3332 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3333 if (!info->dtmf_state) {
3334 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3335 PARSE_ERROR1;
3336 }
3337 if (m->vpar[3] < 5) {
3338 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3339 if (!info->adpcms) {
3340 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3341 PARSE_ERROR1;
3342 }
3343 }
3344 #ifdef ISDN_DEBUG_AT
3345 printk(KERN_DEBUG "AT: +VTX\n");
3346 #endif
3347 m->lastDLE = 0;
3348 info->vonline |= 2;
3349 isdn_tty_modem_result(RESULT_CONNECT, info);
3350 return 0;
3351 break;
3352 case 7:
3353 /* AT+VDD - DTMF detection */
3354 switch (*p[0]) {
3355 case '?':
3356 p[0]++;
3357 sprintf(rs, "\r\n<%d>,<%d>",
3358 m->vpar[4],
3359 m->vpar[5]);
3360 isdn_tty_at_cout(rs, info);
3361 break;
3362 case '=':
3363 p[0]++;
3364 if ((*p[0] >= '0') && (*p[0] <= '9')) {
3365 if (info->online != 1)
3366 PARSE_ERROR1;
3367 par1 = isdn_getnum(p);
3368 if ((par1 < 0) || (par1 > 15))
3369 PARSE_ERROR1;
3370 if (*p[0] != ',')
3371 PARSE_ERROR1;
3372 p[0]++;
3373 par2 = isdn_getnum(p);
3374 if ((par2 < 0) || (par2 > 255))
3375 PARSE_ERROR1;
3376 m->vpar[4] = par1;
3377 m->vpar[5] = par2;
3378 cmd.driver = info->isdn_driver;
3379 cmd.command = ISDN_CMD_AUDIO;
3380 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3381 cmd.parm.num[0] = par1;
3382 cmd.parm.num[1] = par2;
3383 isdn_command(&cmd);
3384 break;
3385 } else
3386 if (*p[0] == '?') {
3387 p[0]++;
3388 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3389 info);
3390 break;
3391 } else
3392 PARSE_ERROR1;
3393 break;
3394 default:
3395 PARSE_ERROR1;
3396 }
3397 break;
3398 default:
3399 PARSE_ERROR1;
3400 }
3401 return 0;
3402 }
3403 #endif /* CONFIG_ISDN_AUDIO */
3404
3405 /*
3406 * Parse and perform an AT-command-line.
3407 */
3408 static void
3409 isdn_tty_parse_at(modem_info *info)
3410 {
3411 atemu *m = &info->emu;
3412 char *p;
3413 char ds[ISDN_MSNLEN];
3414
3415 #ifdef ISDN_DEBUG_AT
3416 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3417 #endif
3418 for (p = &m->mdmcmd[2]; *p;) {
3419 switch (*p) {
3420 case ' ':
3421 p++;
3422 break;
3423 case 'A':
3424 /* A - Accept incoming call */
3425 p++;
3426 isdn_tty_cmd_ATA(info);
3427 return;
3428 break;
3429 case 'D':
3430 /* D - Dial */
3431 if (info->msr & UART_MSR_DCD)
3432 PARSE_ERROR;
3433 if (info->msr & UART_MSR_RI) {
3434 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3435 return;
3436 }
3437 isdn_tty_getdial(++p, ds, sizeof ds);
3438 p += strlen(p);
3439 if (!strlen(m->msn))
3440 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3441 else if (strlen(ds))
3442 isdn_tty_dial(ds, info, m);
3443 else
3444 PARSE_ERROR;
3445 return;
3446 case 'E':
3447 /* E - Turn Echo on/off */
3448 p++;
3449 switch (isdn_getnum(&p)) {
3450 case 0:
3451 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3452 break;
3453 case 1:
3454 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3455 break;
3456 default:
3457 PARSE_ERROR;
3458 }
3459 break;
3460 case 'H':
3461 /* H - On/Off-hook */
3462 p++;
3463 switch (*p) {
3464 case '0':
3465 p++;
3466 isdn_tty_on_hook(info);
3467 break;
3468 case '1':
3469 p++;
3470 isdn_tty_off_hook();
3471 break;
3472 default:
3473 isdn_tty_on_hook(info);
3474 break;
3475 }
3476 break;
3477 case 'I':
3478 /* I - Information */
3479 p++;
3480 isdn_tty_at_cout("\r\nLinux ISDN", info);
3481 switch (*p) {
3482 case '0':
3483 case '1':
3484 p++;
3485 break;
3486 case '2':
3487 p++;
3488 isdn_tty_report(info);
3489 break;
3490 case '3':
3491 p++;
3492 snprintf(ds, sizeof(ds), "\r\n%d", info->emu.charge);
3493 isdn_tty_at_cout(ds, info);
3494 break;
3495 default:;
3496 }
3497 break;
3498 #ifdef DUMMY_HAYES_AT
3499 case 'L':
3500 case 'M':
3501 /* only for be compilant with common scripts */
3502 /* no function */
3503 p++;
3504 isdn_getnum(&p);
3505 break;
3506 #endif
3507 case 'O':
3508 /* O - Go online */
3509 p++;
3510 if (info->msr & UART_MSR_DCD)
3511 /* if B-Channel is up */
3512 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT : RESULT_CONNECT64000, info);
3513 else
3514 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3515 return;
3516 case 'Q':
3517 /* Q - Turn Emulator messages on/off */
3518 p++;
3519 switch (isdn_getnum(&p)) {
3520 case 0:
3521 m->mdmreg[REG_RESP] |= BIT_RESP;
3522 break;
3523 case 1:
3524 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3525 break;
3526 default:
3527 PARSE_ERROR;
3528 }
3529 break;
3530 case 'S':
3531 /* S - Set/Get Register */
3532 p++;
3533 if (isdn_tty_cmd_ATS(&p, info))
3534 return;
3535 break;
3536 case 'V':
3537 /* V - Numeric or ASCII Emulator-messages */
3538 p++;
3539 switch (isdn_getnum(&p)) {
3540 case 0:
3541 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3542 break;
3543 case 1:
3544 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3545 break;
3546 default:
3547 PARSE_ERROR;
3548 }
3549 break;
3550 case 'Z':
3551 /* Z - Load Registers from Profile */
3552 p++;
3553 if (info->msr & UART_MSR_DCD) {
3554 info->online = 0;
3555 isdn_tty_on_hook(info);
3556 }
3557 isdn_tty_modem_reset_regs(info, 1);
3558 break;
3559 case '+':
3560 p++;
3561 switch (*p) {
3562 #ifdef CONFIG_ISDN_AUDIO
3563 case 'F':
3564 p++;
3565 if (isdn_tty_cmd_PLUSF(&p, info))
3566 return;
3567 break;
3568 case 'V':
3569 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3570 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3571 PARSE_ERROR;
3572 p++;
3573 if (isdn_tty_cmd_PLUSV(&p, info))
3574 return;
3575 break;
3576 #endif /* CONFIG_ISDN_AUDIO */
3577 case 'S': /* SUSPEND */
3578 p++;
3579 isdn_tty_get_msnstr(ds, &p);
3580 isdn_tty_suspend(ds, info, m);
3581 break;
3582 case 'R': /* RESUME */
3583 p++;
3584 isdn_tty_get_msnstr(ds, &p);
3585 isdn_tty_resume(ds, info, m);
3586 break;
3587 case 'M': /* MESSAGE */
3588 p++;
3589 isdn_tty_send_msg(info, m, p);
3590 break;
3591 default:
3592 PARSE_ERROR;
3593 }
3594 break;
3595 case '&':
3596 p++;
3597 if (isdn_tty_cmd_ATand(&p, info))
3598 return;
3599 break;
3600 default:
3601 PARSE_ERROR;
3602 }
3603 }
3604 #ifdef CONFIG_ISDN_AUDIO
3605 if (!info->vonline)
3606 #endif
3607 isdn_tty_modem_result(RESULT_OK, info);
3608 }
3609
3610 /* Need own toupper() because standard-toupper is not available
3611 * within modules.
3612 */
3613 #define my_toupper(c) (((c >= 'a') && (c <= 'z')) ? (c & 0xdf) : c)
3614
3615 /*
3616 * Perform line-editing of AT-commands
3617 *
3618 * Parameters:
3619 * p inputbuffer
3620 * count length of buffer
3621 * channel index to line (minor-device)
3622 */
3623 static int
3624 isdn_tty_edit_at(const char *p, int count, modem_info *info)
3625 {
3626 atemu *m = &info->emu;
3627 int total = 0;
3628 u_char c;
3629 char eb[2];
3630 int cnt;
3631
3632 for (cnt = count; cnt > 0; p++, cnt--) {
3633 c = *p;
3634 total++;
3635 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3636 /* Separator (CR or LF) */
3637 m->mdmcmd[m->mdmcmdl] = 0;
3638 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3639 eb[0] = c;
3640 eb[1] = 0;
3641 isdn_tty_at_cout(eb, info);
3642 }
3643 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3644 isdn_tty_parse_at(info);
3645 m->mdmcmdl = 0;
3646 continue;
3647 }
3648 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3649 /* Backspace-Function */
3650 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3651 if (m->mdmcmdl)
3652 m->mdmcmdl--;
3653 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3654 isdn_tty_at_cout("\b", info);
3655 }
3656 continue;
3657 }
3658 if (cmdchar(c)) {
3659 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3660 eb[0] = c;
3661 eb[1] = 0;
3662 isdn_tty_at_cout(eb, info);
3663 }
3664 if (m->mdmcmdl < 255) {
3665 c = my_toupper(c);
3666 switch (m->mdmcmdl) {
3667 case 1:
3668 if (c == 'T') {
3669 m->mdmcmd[m->mdmcmdl] = c;
3670 m->mdmcmd[++m->mdmcmdl] = 0;
3671 break;
3672 } else
3673 m->mdmcmdl = 0;
3674 /* Fall through, check for 'A' */
3675 case 0:
3676 if (c == 'A') {
3677 m->mdmcmd[m->mdmcmdl] = c;
3678 m->mdmcmd[++m->mdmcmdl] = 0;
3679 }
3680 break;
3681 default:
3682 m->mdmcmd[m->mdmcmdl] = c;
3683 m->mdmcmd[++m->mdmcmdl] = 0;
3684 }
3685 }
3686 }
3687 }
3688 return total;
3689 }
3690
3691 /*
3692 * Switch all modem-channels who are online and got a valid
3693 * escape-sequence 1.5 seconds ago, to command-mode.
3694 * This function is called every second via timer-interrupt from within
3695 * timer-dispatcher isdn_timer_function()
3696 */
3697 void
3698 isdn_tty_modem_escape(void)
3699 {
3700 int ton = 0;
3701 int i;
3702 int midx;
3703
3704 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3705 if (USG_MODEM(dev->usage[i]) && (midx = dev->m_idx[i]) >= 0) {
3706 modem_info *info = &dev->mdm.info[midx];
3707 if (info->online) {
3708 ton = 1;
3709 if ((info->emu.pluscount == 3) &&
3710 time_after(jiffies,
3711 info->emu.lastplus + PLUSWAIT2)) {
3712 info->emu.pluscount = 0;
3713 info->online = 0;
3714 isdn_tty_modem_result(RESULT_OK, info);
3715 }
3716 }
3717 }
3718 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3719 }
3720
3721 /*
3722 * Put a RING-message to all modem-channels who have the RI-bit set.
3723 * This function is called every second via timer-interrupt from within
3724 * timer-dispatcher isdn_timer_function()
3725 */
3726 void
3727 isdn_tty_modem_ring(void)
3728 {
3729 int ton = 0;
3730 int i;
3731
3732 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3733 modem_info *info = &dev->mdm.info[i];
3734 if (info->msr & UART_MSR_RI) {
3735 ton = 1;
3736 isdn_tty_modem_result(RESULT_RING, info);
3737 }
3738 }
3739 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3740 }
3741
3742 /*
3743 * For all online tty's, try sending data to
3744 * the lower levels.
3745 */
3746 void
3747 isdn_tty_modem_xmit(void)
3748 {
3749 int ton = 1;
3750 int i;
3751
3752 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3753 modem_info *info = &dev->mdm.info[i];
3754 if (info->online) {
3755 ton = 1;
3756 isdn_tty_senddown(info);
3757 isdn_tty_tint(info);
3758 }
3759 }
3760 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3761 }
3762
3763 /*
3764 * Check all channels if we have a 'no carrier' timeout.
3765 * Timeout value is set by Register S7.
3766 */
3767 void
3768 isdn_tty_carrier_timeout(void)
3769 {
3770 int ton = 0;
3771 int i;
3772
3773 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3774 modem_info *info = &dev->mdm.info[i];
3775 if (!info->dialing)
3776 continue;
3777 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3778 info->dialing = 0;
3779 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3780 isdn_tty_modem_hup(info, 1);
3781 } else
3782 ton = 1;
3783 }
3784 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3785 }
Linux kernel - Deliverables
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