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