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