1 /* $Id: isdn_tty.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
2 *
3 * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel).
4 *
5 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
6 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
7 *
8 * This software may be used and distributed according to the terms
9 * of the GNU General Public License, incorporated herein by reference.
10 *
11 */
12 #undef ISDN_TTY_STAT_DEBUG
13
14 #include <linux/isdn.h>
15 #include <linux/delay.h>
16 #include "isdn_common.h"
17 #include "isdn_tty.h"
18 #ifdef CONFIG_ISDN_AUDIO
19 #include "isdn_audio.h"
20 #define VBUF 0x3e0
21 #define VBUFX (VBUF/16)
22 #endif
23
24 #define FIX_FILE_TRANSFER
25 #define DUMMY_HAYES_AT
26
27 /* Prototypes */
28
29 static int isdn_tty_edit_at(const char *, int, modem_info *);
30 static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
31 static void isdn_tty_modem_reset_regs(modem_info *, int);
32 static void isdn_tty_cmd_ATA(modem_info *);
33 static void isdn_tty_flush_buffer(struct tty_struct *);
34 static void isdn_tty_modem_result(int, modem_info *);
35 #ifdef CONFIG_ISDN_AUDIO
36 static int isdn_tty_countDLE(unsigned char *, int);
37 #endif
38
39 /* Leave this unchanged unless you know what you do! */
40 #define MODEM_PARANOIA_CHECK
41 #define MODEM_DO_RESTART
42
43 static int bit2si[8] =
44 {1, 5, 7, 7, 7, 7, 7, 7};
45 static int si2bit[8] =
46 {4, 1, 4, 4, 4, 4, 4, 4};
47
48 char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
49
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 int c;
64 int len;
65 struct tty_struct *tty;
66 char last;
67
68 if (info->online) {
69 if ((tty = info->tty)) {
70 if (info->mcr & UART_MCR_RTS) {
71 len = skb->len
72 #ifdef CONFIG_ISDN_AUDIO
73 + ISDN_AUDIO_SKB_DLECOUNT(skb)
74 #endif
75 ;
76
77 c = tty_buffer_request_room(tty, len);
78 if (c >= len) {
79 #ifdef CONFIG_ISDN_AUDIO
80 if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
81 int l = skb->len;
82 unsigned char *dp = skb->data;
83 while (--l) {
84 if (*dp == DLE)
85 tty_insert_flip_char(tty, DLE, 0);
86 tty_insert_flip_char(tty, *dp++, 0);
87 }
88 if (*dp == DLE)
89 tty_insert_flip_char(tty, DLE, 0);
90 last = *dp;
91 } else {
92 #endif
93 if(len > 1)
94 tty_insert_flip_string(tty, skb->data, len - 1);
95 last = skb->data[len - 1];
96 #ifdef CONFIG_ISDN_AUDIO
97 }
98 #endif
99 if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
100 tty_insert_flip_char(tty, last, 0xFF);
101 else
102 tty_insert_flip_char(tty, last, TTY_NORMAL);
103 tty_flip_buffer_push(tty);
104 kfree_skb(skb);
105 return 1;
106 }
107 }
108 }
109 }
110 return 0;
111 }
112
113 /* isdn_tty_readmodem() is called periodically from within timer-interrupt.
114 * It tries getting received data from the receive queue an stuff it into
115 * the tty's flip-buffer.
116 */
117 void
isdn_tty_readmodem(void)118 isdn_tty_readmodem(void)
119 {
120 int resched = 0;
121 int midx;
122 int i;
123 int r;
124 struct tty_struct *tty;
125 modem_info *info;
126
127 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
128 if ((midx = dev->m_idx[i]) >= 0) {
129 info = &dev->mdm.info[midx];
130 if (info->online) {
131 r = 0;
132 #ifdef CONFIG_ISDN_AUDIO
133 isdn_audio_eval_dtmf(info);
134 if ((info->vonline & 1) && (info->emu.vpar[1]))
135 isdn_audio_eval_silence(info);
136 #endif
137 if ((tty = info->tty)) {
138 if (info->mcr & UART_MCR_RTS) {
139 /* CISCO AsyncPPP Hack */
140 if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
141 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
142 else
143 r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
144 if (r)
145 tty_flip_buffer_push(tty);
146 } else
147 r = 1;
148 } else
149 r = 1;
150 if (r) {
151 info->rcvsched = 0;
152 resched = 1;
153 } else
154 info->rcvsched = 1;
155 }
156 }
157 }
158 if (!resched)
159 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
160 }
161
162 int
isdn_tty_rcv_skb(int i,int di,int channel,struct sk_buff * skb)163 isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
164 {
165 ulong flags;
166 int midx;
167 #ifdef CONFIG_ISDN_AUDIO
168 int ifmt;
169 #endif
170 modem_info *info;
171
172 if ((midx = dev->m_idx[i]) < 0) {
173 /* if midx is invalid, packet is not for tty */
174 return 0;
175 }
176 info = &dev->mdm.info[midx];
177 #ifdef CONFIG_ISDN_AUDIO
178 ifmt = 1;
179
180 if ((info->vonline) && (!info->emu.vpar[4]))
181 isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
182 if ((info->vonline & 1) && (info->emu.vpar[1]))
183 isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
184 #endif
185 if ((info->online < 2)
186 #ifdef CONFIG_ISDN_AUDIO
187 && (!(info->vonline & 1))
188 #endif
189 ) {
190 /* If Modem not listening, drop data */
191 kfree_skb(skb);
192 return 1;
193 }
194 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
195 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
196 /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */
197 if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */
198 skb_pull(skb, 4);
199 else
200 if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */
201 skb_pull(skb, 2);
202 } else
203 /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
204 if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
205 skb_pull(skb, 4);
206 }
207 #ifdef CONFIG_ISDN_AUDIO
208 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
209 ISDN_AUDIO_SKB_LOCK(skb) = 0;
210 if (info->vonline & 1) {
211 /* voice conversion/compression */
212 switch (info->emu.vpar[3]) {
213 case 2:
214 case 3:
215 case 4:
216 /* adpcm
217 * Since compressed data takes less
218 * space, we can overwrite the buffer.
219 */
220 skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
221 ifmt,
222 skb->data,
223 skb->data,
224 skb->len));
225 break;
226 case 5:
227 /* a-law */
228 if (!ifmt)
229 isdn_audio_ulaw2alaw(skb->data, skb->len);
230 break;
231 case 6:
232 /* u-law */
233 if (ifmt)
234 isdn_audio_alaw2ulaw(skb->data, skb->len);
235 break;
236 }
237 ISDN_AUDIO_SKB_DLECOUNT(skb) =
238 isdn_tty_countDLE(skb->data, skb->len);
239 }
240 #ifdef CONFIG_ISDN_TTY_FAX
241 else {
242 if (info->faxonline & 2) {
243 isdn_tty_fax_bitorder(info, skb);
244 ISDN_AUDIO_SKB_DLECOUNT(skb) =
245 isdn_tty_countDLE(skb->data, skb->len);
246 }
247 }
248 #endif
249 #endif
250 /* Try to deliver directly via tty-buf if queue is empty */
251 spin_lock_irqsave(&info->readlock, flags);
252 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
253 if (isdn_tty_try_read(info, skb)) {
254 spin_unlock_irqrestore(&info->readlock, flags);
255 return 1;
256 }
257 /* Direct deliver failed or queue wasn't empty.
258 * Queue up for later dequeueing via timer-irq.
259 */
260 __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
261 dev->drv[di]->rcvcount[channel] +=
262 (skb->len
263 #ifdef CONFIG_ISDN_AUDIO
264 + ISDN_AUDIO_SKB_DLECOUNT(skb)
265 #endif
266 );
267 spin_unlock_irqrestore(&info->readlock, flags);
268 /* Schedule dequeuing */
269 if ((dev->modempoll) && (info->rcvsched))
270 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
271 return 1;
272 }
273
274 static void
isdn_tty_cleanup_xmit(modem_info * info)275 isdn_tty_cleanup_xmit(modem_info * info)
276 {
277 skb_queue_purge(&info->xmit_queue);
278 #ifdef CONFIG_ISDN_AUDIO
279 skb_queue_purge(&info->dtmf_queue);
280 #endif
281 }
282
283 static void
isdn_tty_tint(modem_info * info)284 isdn_tty_tint(modem_info * info)
285 {
286 struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
287 int len, slen;
288
289 if (!skb)
290 return;
291 len = skb->len;
292 if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
293 info->isdn_channel, 1, skb)) == len) {
294 struct tty_struct *tty = info->tty;
295 info->send_outstanding++;
296 info->msr &= ~UART_MSR_CTS;
297 info->lsr &= ~UART_LSR_TEMT;
298 tty_wakeup(tty);
299 return;
300 }
301 if (slen < 0) {
302 /* Error: no channel, already shutdown, or wrong parameter */
303 dev_kfree_skb(skb);
304 return;
305 }
306 skb_queue_head(&info->xmit_queue, skb);
307 }
308
309 #ifdef CONFIG_ISDN_AUDIO
310 static int
isdn_tty_countDLE(unsigned char * buf,int len)311 isdn_tty_countDLE(unsigned char *buf, int len)
312 {
313 int count = 0;
314
315 while (len--)
316 if (*buf++ == DLE)
317 count++;
318 return count;
319 }
320
321 /* This routine is called from within isdn_tty_write() to perform
322 * DLE-decoding when sending audio-data.
323 */
324 static int
isdn_tty_handleDLEdown(modem_info * info,atemu * m,int len)325 isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len)
326 {
327 unsigned char *p = &info->xmit_buf[info->xmit_count];
328 int count = 0;
329
330 while (len > 0) {
331 if (m->lastDLE) {
332 m->lastDLE = 0;
333 switch (*p) {
334 case DLE:
335 /* Escape code */
336 if (len > 1)
337 memmove(p, p + 1, len - 1);
338 p--;
339 count++;
340 break;
341 case ETX:
342 /* End of data */
343 info->vonline |= 4;
344 return count;
345 case DC4:
346 /* Abort RX */
347 info->vonline &= ~1;
348 #ifdef ISDN_DEBUG_MODEM_VOICE
349 printk(KERN_DEBUG
350 "DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
351 info->line);
352 #endif
353 isdn_tty_at_cout("\020\003", info);
354 if (!info->vonline) {
355 #ifdef ISDN_DEBUG_MODEM_VOICE
356 printk(KERN_DEBUG
357 "DLEdown: send VCON on ttyI%d\n",
358 info->line);
359 #endif
360 isdn_tty_at_cout("\r\nVCON\r\n", info);
361 }
362 /* Fall through */
363 case 'q':
364 case 's':
365 /* Silence */
366 if (len > 1)
367 memmove(p, p + 1, len - 1);
368 p--;
369 break;
370 }
371 } else {
372 if (*p == DLE)
373 m->lastDLE = 1;
374 else
375 count++;
376 }
377 p++;
378 len--;
379 }
380 if (len < 0) {
381 printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
382 return 0;
383 }
384 return count;
385 }
386
387 /* This routine is called from within isdn_tty_write() when receiving
388 * audio-data. It interrupts receiving, if an character other than
389 * ^S or ^Q is sent.
390 */
391 static int
isdn_tty_end_vrx(const char * buf,int c)392 isdn_tty_end_vrx(const char *buf, int c)
393 {
394 char ch;
395
396 while (c--) {
397 ch = *buf;
398 if ((ch != 0x11) && (ch != 0x13))
399 return 1;
400 buf++;
401 }
402 return 0;
403 }
404
405 static int voice_cf[7] =
406 {0, 0, 4, 3, 2, 0, 0};
407
408 #endif /* CONFIG_ISDN_AUDIO */
409
410 /* isdn_tty_senddown() is called either directly from within isdn_tty_write()
411 * or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
412 * outgoing data from the tty's xmit-buffer, handles voice-decompression or
413 * T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
414 */
415 static void
isdn_tty_senddown(modem_info * info)416 isdn_tty_senddown(modem_info * info)
417 {
418 int buflen;
419 int skb_res;
420 #ifdef CONFIG_ISDN_AUDIO
421 int audio_len;
422 #endif
423 struct sk_buff *skb;
424
425 #ifdef CONFIG_ISDN_AUDIO
426 if (info->vonline & 4) {
427 info->vonline &= ~6;
428 if (!info->vonline) {
429 #ifdef ISDN_DEBUG_MODEM_VOICE
430 printk(KERN_DEBUG
431 "senddown: send VCON on ttyI%d\n",
432 info->line);
433 #endif
434 isdn_tty_at_cout("\r\nVCON\r\n", info);
435 }
436 }
437 #endif
438 if (!(buflen = info->xmit_count))
439 return;
440 if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
441 info->msr &= ~UART_MSR_CTS;
442 info->lsr &= ~UART_LSR_TEMT;
443 /* info->xmit_count is modified here and in isdn_tty_write().
444 * So we return here if isdn_tty_write() is in the
445 * critical section.
446 */
447 atomic_inc(&info->xmit_lock);
448 if (!(atomic_dec_and_test(&info->xmit_lock)))
449 return;
450 if (info->isdn_driver < 0) {
451 info->xmit_count = 0;
452 return;
453 }
454 skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
455 #ifdef CONFIG_ISDN_AUDIO
456 if (info->vonline & 2)
457 audio_len = buflen * voice_cf[info->emu.vpar[3]];
458 else
459 audio_len = 0;
460 skb = dev_alloc_skb(skb_res + buflen + audio_len);
461 #else
462 skb = dev_alloc_skb(skb_res + buflen);
463 #endif
464 if (!skb) {
465 printk(KERN_WARNING
466 "isdn_tty: Out of memory in ttyI%d senddown\n",
467 info->line);
468 return;
469 }
470 skb_reserve(skb, skb_res);
471 memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
472 info->xmit_count = 0;
473 #ifdef CONFIG_ISDN_AUDIO
474 if (info->vonline & 2) {
475 /* For now, ifmt is fixed to 1 (alaw), since this
476 * is used with ISDN everywhere in the world, except
477 * US, Canada and Japan.
478 * Later, when US-ISDN protocols are implemented,
479 * this setting will depend on the D-channel protocol.
480 */
481 int ifmt = 1;
482
483 /* voice conversion/decompression */
484 switch (info->emu.vpar[3]) {
485 case 2:
486 case 3:
487 case 4:
488 /* adpcm, compatible to ZyXel 1496 modem
489 * with ROM revision 6.01
490 */
491 audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
492 ifmt,
493 skb->data,
494 skb_put(skb, audio_len),
495 buflen);
496 skb_pull(skb, buflen);
497 skb_trim(skb, audio_len);
498 break;
499 case 5:
500 /* a-law */
501 if (!ifmt)
502 isdn_audio_alaw2ulaw(skb->data,
503 buflen);
504 break;
505 case 6:
506 /* u-law */
507 if (ifmt)
508 isdn_audio_ulaw2alaw(skb->data,
509 buflen);
510 break;
511 }
512 }
513 #endif /* CONFIG_ISDN_AUDIO */
514 if (info->emu.mdmreg[REG_T70] & BIT_T70) {
515 /* Add T.70 simplified header */
516 if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
517 memcpy(skb_push(skb, 2), "\1\0", 2);
518 else
519 memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
520 }
521 skb_queue_tail(&info->xmit_queue, skb);
522 }
523
524 /************************************************************
525 *
526 * Modem-functions
527 *
528 * mostly "stolen" from original Linux-serial.c and friends.
529 *
530 ************************************************************/
531
532 /* The next routine is called once from within timer-interrupt
533 * triggered within isdn_tty_modem_ncarrier(). It calls
534 * isdn_tty_modem_result() to stuff a "NO CARRIER" Message
535 * into the tty's buffer.
536 */
537 static void
isdn_tty_modem_do_ncarrier(unsigned long data)538 isdn_tty_modem_do_ncarrier(unsigned long data)
539 {
540 modem_info *info = (modem_info *) data;
541 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
542 }
543
544 /* Next routine is called, whenever the DTR-signal is raised.
545 * It checks the ncarrier-flag, and triggers the above routine
546 * when necessary. The ncarrier-flag is set, whenever DTR goes
547 * low.
548 */
549 static void
isdn_tty_modem_ncarrier(modem_info * info)550 isdn_tty_modem_ncarrier(modem_info * info)
551 {
552 if (info->ncarrier) {
553 info->nc_timer.expires = jiffies + HZ;
554 add_timer(&info->nc_timer);
555 }
556 }
557
558 /*
559 * return the usage calculated by si and layer 2 protocol
560 */
561 static int
isdn_calc_usage(int si,int l2)562 isdn_calc_usage(int si, int l2)
563 {
564 int usg = ISDN_USAGE_MODEM;
565
566 #ifdef CONFIG_ISDN_AUDIO
567 if (si == 1) {
568 switch(l2) {
569 case ISDN_PROTO_L2_MODEM:
570 usg = ISDN_USAGE_MODEM;
571 break;
572 #ifdef CONFIG_ISDN_TTY_FAX
573 case ISDN_PROTO_L2_FAX:
574 usg = ISDN_USAGE_FAX;
575 break;
576 #endif
577 case ISDN_PROTO_L2_TRANS:
578 default:
579 usg = ISDN_USAGE_VOICE;
580 break;
581 }
582 }
583 #endif
584 return(usg);
585 }
586
587 /* isdn_tty_dial() performs dialing of a tty an the necessary
588 * setup of the lower levels before that.
589 */
590 static void
isdn_tty_dial(char * n,modem_info * info,atemu * m)591 isdn_tty_dial(char *n, modem_info * info, atemu * m)
592 {
593 int usg = ISDN_USAGE_MODEM;
594 int si = 7;
595 int l2 = m->mdmreg[REG_L2PROT];
596 u_long flags;
597 isdn_ctrl cmd;
598 int i;
599 int j;
600
601 for (j = 7; j >= 0; j--)
602 if (m->mdmreg[REG_SI1] & (1 << j)) {
603 si = bit2si[j];
604 break;
605 }
606 usg = isdn_calc_usage(si, l2);
607 #ifdef CONFIG_ISDN_AUDIO
608 if ((si == 1) &&
609 (l2 != ISDN_PROTO_L2_MODEM)
610 #ifdef CONFIG_ISDN_TTY_FAX
611 && (l2 != ISDN_PROTO_L2_FAX)
612 #endif
613 ) {
614 l2 = ISDN_PROTO_L2_TRANS;
615 usg = ISDN_USAGE_VOICE;
616 }
617 #endif
618 m->mdmreg[REG_SI1I] = si2bit[si];
619 spin_lock_irqsave(&dev->lock, flags);
620 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
621 if (i < 0) {
622 spin_unlock_irqrestore(&dev->lock, flags);
623 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
624 } else {
625 info->isdn_driver = dev->drvmap[i];
626 info->isdn_channel = dev->chanmap[i];
627 info->drv_index = i;
628 dev->m_idx[i] = info->line;
629 dev->usage[i] |= ISDN_USAGE_OUTGOING;
630 info->last_dir = 1;
631 strcpy(info->last_num, n);
632 isdn_info_update();
633 spin_unlock_irqrestore(&dev->lock, flags);
634 cmd.driver = info->isdn_driver;
635 cmd.arg = info->isdn_channel;
636 cmd.command = ISDN_CMD_CLREAZ;
637 isdn_command(&cmd);
638 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
639 cmd.driver = info->isdn_driver;
640 cmd.command = ISDN_CMD_SETEAZ;
641 isdn_command(&cmd);
642 cmd.driver = info->isdn_driver;
643 cmd.command = ISDN_CMD_SETL2;
644 info->last_l2 = l2;
645 cmd.arg = info->isdn_channel + (l2 << 8);
646 isdn_command(&cmd);
647 cmd.driver = info->isdn_driver;
648 cmd.command = ISDN_CMD_SETL3;
649 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
650 #ifdef CONFIG_ISDN_TTY_FAX
651 if (l2 == ISDN_PROTO_L2_FAX) {
652 cmd.parm.fax = info->fax;
653 info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
654 }
655 #endif
656 isdn_command(&cmd);
657 cmd.driver = info->isdn_driver;
658 cmd.arg = info->isdn_channel;
659 sprintf(cmd.parm.setup.phone, "%s", n);
660 sprintf(cmd.parm.setup.eazmsn, "%s",
661 isdn_map_eaz2msn(m->msn, info->isdn_driver));
662 cmd.parm.setup.si1 = si;
663 cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
664 cmd.command = ISDN_CMD_DIAL;
665 info->dialing = 1;
666 info->emu.carrierwait = 0;
667 strcpy(dev->num[i], n);
668 isdn_info_update();
669 isdn_command(&cmd);
670 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
671 }
672 }
673
674 /* isdn_tty_hangup() disassociates a tty from the real
675 * ISDN-line (hangup). The usage-status is cleared
676 * and some cleanup is done also.
677 */
678 void
isdn_tty_modem_hup(modem_info * info,int local)679 isdn_tty_modem_hup(modem_info * info, int local)
680 {
681 isdn_ctrl cmd;
682 int di, ch;
683
684 if (!info)
685 return;
686
687 di = info->isdn_driver;
688 ch = info->isdn_channel;
689 if (di < 0 || ch < 0)
690 return;
691
692 info->isdn_driver = -1;
693 info->isdn_channel = -1;
694
695 #ifdef ISDN_DEBUG_MODEM_HUP
696 printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
697 #endif
698 info->rcvsched = 0;
699 isdn_tty_flush_buffer(info->tty);
700 if (info->online) {
701 info->last_lhup = local;
702 info->online = 0;
703 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
704 }
705 #ifdef CONFIG_ISDN_AUDIO
706 info->vonline = 0;
707 #ifdef CONFIG_ISDN_TTY_FAX
708 info->faxonline = 0;
709 info->fax->phase = ISDN_FAX_PHASE_IDLE;
710 #endif
711 info->emu.vpar[4] = 0;
712 info->emu.vpar[5] = 8;
713 kfree(info->dtmf_state);
714 info->dtmf_state = NULL;
715 kfree(info->silence_state);
716 info->silence_state = NULL;
717 kfree(info->adpcms);
718 info->adpcms = NULL;
719 kfree(info->adpcmr);
720 info->adpcmr = NULL;
721 #endif
722 if ((info->msr & UART_MSR_RI) &&
723 (info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
724 isdn_tty_modem_result(RESULT_RUNG, info);
725 info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
726 info->lsr |= UART_LSR_TEMT;
727
728 if (local) {
729 cmd.driver = di;
730 cmd.command = ISDN_CMD_HANGUP;
731 cmd.arg = ch;
732 isdn_command(&cmd);
733 }
734
735 isdn_all_eaz(di, ch);
736 info->emu.mdmreg[REG_RINGCNT] = 0;
737 isdn_free_channel(di, ch, 0);
738
739 if (info->drv_index >= 0) {
740 dev->m_idx[info->drv_index] = -1;
741 info->drv_index = -1;
742 }
743 }
744
745 /*
746 * Begin of a CAPI like interface, currently used only for
747 * supplementary service (CAPI 2.0 part III)
748 */
749 #include <linux/isdn/capicmd.h>
750
751 int
isdn_tty_capi_facility(capi_msg * cm)752 isdn_tty_capi_facility(capi_msg *cm) {
753 return(-1); /* dummy */
754 }
755
756 /* isdn_tty_suspend() tries to suspend the current tty connection
757 */
758 static void
isdn_tty_suspend(char * id,modem_info * info,atemu * m)759 isdn_tty_suspend(char *id, modem_info * info, atemu * m)
760 {
761 isdn_ctrl cmd;
762
763 int l;
764
765 if (!info)
766 return;
767
768 #ifdef ISDN_DEBUG_MODEM_SERVICES
769 printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
770 #endif
771 l = strlen(id);
772 if ((info->isdn_driver >= 0)) {
773 cmd.parm.cmsg.Length = l+18;
774 cmd.parm.cmsg.Command = CAPI_FACILITY;
775 cmd.parm.cmsg.Subcommand = CAPI_REQ;
776 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
777 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
778 cmd.parm.cmsg.para[1] = 0;
779 cmd.parm.cmsg.para[2] = l + 3;
780 cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
781 cmd.parm.cmsg.para[4] = 0;
782 cmd.parm.cmsg.para[5] = l;
783 strncpy(&cmd.parm.cmsg.para[6], id, l);
784 cmd.command = CAPI_PUT_MESSAGE;
785 cmd.driver = info->isdn_driver;
786 cmd.arg = info->isdn_channel;
787 isdn_command(&cmd);
788 }
789 }
790
791 /* isdn_tty_resume() tries to resume a suspended call
792 * setup of the lower levels before that. unfortunatly here is no
793 * checking for compatibility of used protocols implemented by Q931
794 * It does the same things like isdn_tty_dial, the last command
795 * is different, may be we can merge it.
796 */
797
798 static void
isdn_tty_resume(char * id,modem_info * info,atemu * m)799 isdn_tty_resume(char *id, modem_info * info, atemu * m)
800 {
801 int usg = ISDN_USAGE_MODEM;
802 int si = 7;
803 int l2 = m->mdmreg[REG_L2PROT];
804 isdn_ctrl cmd;
805 ulong flags;
806 int i;
807 int j;
808 int l;
809
810 l = strlen(id);
811 for (j = 7; j >= 0; j--)
812 if (m->mdmreg[REG_SI1] & (1 << j)) {
813 si = bit2si[j];
814 break;
815 }
816 usg = isdn_calc_usage(si, l2);
817 #ifdef CONFIG_ISDN_AUDIO
818 if ((si == 1) &&
819 (l2 != ISDN_PROTO_L2_MODEM)
820 #ifdef CONFIG_ISDN_TTY_FAX
821 && (l2 != ISDN_PROTO_L2_FAX)
822 #endif
823 ) {
824 l2 = ISDN_PROTO_L2_TRANS;
825 usg = ISDN_USAGE_VOICE;
826 }
827 #endif
828 m->mdmreg[REG_SI1I] = si2bit[si];
829 spin_lock_irqsave(&dev->lock, flags);
830 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
831 if (i < 0) {
832 spin_unlock_irqrestore(&dev->lock, flags);
833 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
834 } else {
835 info->isdn_driver = dev->drvmap[i];
836 info->isdn_channel = dev->chanmap[i];
837 info->drv_index = i;
838 dev->m_idx[i] = info->line;
839 dev->usage[i] |= ISDN_USAGE_OUTGOING;
840 info->last_dir = 1;
841 // strcpy(info->last_num, n);
842 isdn_info_update();
843 spin_unlock_irqrestore(&dev->lock, flags);
844 cmd.driver = info->isdn_driver;
845 cmd.arg = info->isdn_channel;
846 cmd.command = ISDN_CMD_CLREAZ;
847 isdn_command(&cmd);
848 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
849 cmd.driver = info->isdn_driver;
850 cmd.command = ISDN_CMD_SETEAZ;
851 isdn_command(&cmd);
852 cmd.driver = info->isdn_driver;
853 cmd.command = ISDN_CMD_SETL2;
854 info->last_l2 = l2;
855 cmd.arg = info->isdn_channel + (l2 << 8);
856 isdn_command(&cmd);
857 cmd.driver = info->isdn_driver;
858 cmd.command = ISDN_CMD_SETL3;
859 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
860 isdn_command(&cmd);
861 cmd.driver = info->isdn_driver;
862 cmd.arg = info->isdn_channel;
863 cmd.parm.cmsg.Length = l+18;
864 cmd.parm.cmsg.Command = CAPI_FACILITY;
865 cmd.parm.cmsg.Subcommand = CAPI_REQ;
866 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
867 cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
868 cmd.parm.cmsg.para[1] = 0;
869 cmd.parm.cmsg.para[2] = l+3;
870 cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
871 cmd.parm.cmsg.para[4] = 0;
872 cmd.parm.cmsg.para[5] = l;
873 strncpy(&cmd.parm.cmsg.para[6], id, l);
874 cmd.command =CAPI_PUT_MESSAGE;
875 info->dialing = 1;
876 // strcpy(dev->num[i], n);
877 isdn_info_update();
878 isdn_command(&cmd);
879 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
880 }
881 }
882
883 /* isdn_tty_send_msg() sends a message to a HL driver
884 * This is used for hybrid modem cards to send AT commands to it
885 */
886
887 static void
isdn_tty_send_msg(modem_info * info,atemu * m,char * msg)888 isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
889 {
890 int usg = ISDN_USAGE_MODEM;
891 int si = 7;
892 int l2 = m->mdmreg[REG_L2PROT];
893 isdn_ctrl cmd;
894 ulong flags;
895 int i;
896 int j;
897 int l;
898
899 l = strlen(msg);
900 if (!l) {
901 isdn_tty_modem_result(RESULT_ERROR, info);
902 return;
903 }
904 for (j = 7; j >= 0; j--)
905 if (m->mdmreg[REG_SI1] & (1 << j)) {
906 si = bit2si[j];
907 break;
908 }
909 usg = isdn_calc_usage(si, l2);
910 #ifdef CONFIG_ISDN_AUDIO
911 if ((si == 1) &&
912 (l2 != ISDN_PROTO_L2_MODEM)
913 #ifdef CONFIG_ISDN_TTY_FAX
914 && (l2 != ISDN_PROTO_L2_FAX)
915 #endif
916 ) {
917 l2 = ISDN_PROTO_L2_TRANS;
918 usg = ISDN_USAGE_VOICE;
919 }
920 #endif
921 m->mdmreg[REG_SI1I] = si2bit[si];
922 spin_lock_irqsave(&dev->lock, flags);
923 i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
924 if (i < 0) {
925 spin_unlock_irqrestore(&dev->lock, flags);
926 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
927 } else {
928 info->isdn_driver = dev->drvmap[i];
929 info->isdn_channel = dev->chanmap[i];
930 info->drv_index = i;
931 dev->m_idx[i] = info->line;
932 dev->usage[i] |= ISDN_USAGE_OUTGOING;
933 info->last_dir = 1;
934 isdn_info_update();
935 spin_unlock_irqrestore(&dev->lock, flags);
936 cmd.driver = info->isdn_driver;
937 cmd.arg = info->isdn_channel;
938 cmd.command = ISDN_CMD_CLREAZ;
939 isdn_command(&cmd);
940 strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
941 cmd.driver = info->isdn_driver;
942 cmd.command = ISDN_CMD_SETEAZ;
943 isdn_command(&cmd);
944 cmd.driver = info->isdn_driver;
945 cmd.command = ISDN_CMD_SETL2;
946 info->last_l2 = l2;
947 cmd.arg = info->isdn_channel + (l2 << 8);
948 isdn_command(&cmd);
949 cmd.driver = info->isdn_driver;
950 cmd.command = ISDN_CMD_SETL3;
951 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
952 isdn_command(&cmd);
953 cmd.driver = info->isdn_driver;
954 cmd.arg = info->isdn_channel;
955 cmd.parm.cmsg.Length = l+14;
956 cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
957 cmd.parm.cmsg.Subcommand = CAPI_REQ;
958 cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
959 cmd.parm.cmsg.para[0] = l+1;
960 strncpy(&cmd.parm.cmsg.para[1], msg, l);
961 cmd.parm.cmsg.para[l+1] = 0xd;
962 cmd.command =CAPI_PUT_MESSAGE;
963 /* info->dialing = 1;
964 strcpy(dev->num[i], n);
965 isdn_info_update();
966 */
967 isdn_command(&cmd);
968 }
969 }
970
971 static inline int
isdn_tty_paranoia_check(modem_info * info,char * name,const char * routine)972 isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
973 {
974 #ifdef MODEM_PARANOIA_CHECK
975 if (!info) {
976 printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
977 name, routine);
978 return 1;
979 }
980 if (info->magic != ISDN_ASYNC_MAGIC) {
981 printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
982 name, routine);
983 return 1;
984 }
985 #endif
986 return 0;
987 }
988
989 /*
990 * This routine is called to set the UART divisor registers to match
991 * the specified baud rate for a serial port.
992 */
993 static void
isdn_tty_change_speed(modem_info * info)994 isdn_tty_change_speed(modem_info * info)
995 {
996 uint cflag,
997 cval,
998 fcr,
999 quot;
1000 int i;
1001
1002 if (!info->tty || !info->tty->termios)
1003 return;
1004 cflag = info->tty->termios->c_cflag;
1005
1006 quot = i = cflag & CBAUD;
1007 if (i & CBAUDEX) {
1008 i &= ~CBAUDEX;
1009 if (i < 1 || i > 2)
1010 info->tty->termios->c_cflag &= ~CBAUDEX;
1011 else
1012 i += 15;
1013 }
1014 if (quot) {
1015 info->mcr |= UART_MCR_DTR;
1016 isdn_tty_modem_ncarrier(info);
1017 } else {
1018 info->mcr &= ~UART_MCR_DTR;
1019 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1020 #ifdef ISDN_DEBUG_MODEM_HUP
1021 printk(KERN_DEBUG "Mhup in changespeed\n");
1022 #endif
1023 if (info->online)
1024 info->ncarrier = 1;
1025 isdn_tty_modem_reset_regs(info, 0);
1026 isdn_tty_modem_hup(info, 1);
1027 }
1028 return;
1029 }
1030 /* byte size and parity */
1031 cval = cflag & (CSIZE | CSTOPB);
1032 cval >>= 4;
1033 if (cflag & PARENB)
1034 cval |= UART_LCR_PARITY;
1035 if (!(cflag & PARODD))
1036 cval |= UART_LCR_EPAR;
1037 fcr = 0;
1038
1039 /* CTS flow control flag and modem status interrupts */
1040 if (cflag & CRTSCTS) {
1041 info->flags |= ISDN_ASYNC_CTS_FLOW;
1042 } else
1043 info->flags &= ~ISDN_ASYNC_CTS_FLOW;
1044 if (cflag & CLOCAL)
1045 info->flags &= ~ISDN_ASYNC_CHECK_CD;
1046 else {
1047 info->flags |= ISDN_ASYNC_CHECK_CD;
1048 }
1049 }
1050
1051 static int
isdn_tty_startup(modem_info * info)1052 isdn_tty_startup(modem_info * info)
1053 {
1054 if (info->flags & ISDN_ASYNC_INITIALIZED)
1055 return 0;
1056 isdn_lock_drivers();
1057 #ifdef ISDN_DEBUG_MODEM_OPEN
1058 printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
1059 #endif
1060 /*
1061 * Now, initialize the UART
1062 */
1063 info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
1064 if (info->tty)
1065 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1066 /*
1067 * and set the speed of the serial port
1068 */
1069 isdn_tty_change_speed(info);
1070
1071 info->flags |= ISDN_ASYNC_INITIALIZED;
1072 info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
1073 info->send_outstanding = 0;
1074 return 0;
1075 }
1076
1077 /*
1078 * This routine will shutdown a serial port; interrupts are disabled, and
1079 * DTR is dropped if the hangup on close termio flag is on.
1080 */
1081 static void
isdn_tty_shutdown(modem_info * info)1082 isdn_tty_shutdown(modem_info * info)
1083 {
1084 if (!(info->flags & ISDN_ASYNC_INITIALIZED))
1085 return;
1086 #ifdef ISDN_DEBUG_MODEM_OPEN
1087 printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
1088 #endif
1089 isdn_unlock_drivers();
1090 info->msr &= ~UART_MSR_RI;
1091 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
1092 info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
1093 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1094 isdn_tty_modem_reset_regs(info, 0);
1095 #ifdef ISDN_DEBUG_MODEM_HUP
1096 printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
1097 #endif
1098 isdn_tty_modem_hup(info, 1);
1099 }
1100 }
1101 if (info->tty)
1102 set_bit(TTY_IO_ERROR, &info->tty->flags);
1103
1104 info->flags &= ~ISDN_ASYNC_INITIALIZED;
1105 }
1106
1107 /* isdn_tty_write() is the main send-routine. It is called from the upper
1108 * levels within the kernel to perform sending data. Depending on the
1109 * online-flag it either directs output to the at-command-interpreter or
1110 * to the lower level. Additional tasks done here:
1111 * - If online, check for escape-sequence (+++)
1112 * - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
1113 * - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
1114 * - If dialing, abort dial.
1115 */
1116 static int
isdn_tty_write(struct tty_struct * tty,const u_char * buf,int count)1117 isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
1118 {
1119 int c;
1120 int total = 0;
1121 modem_info *info = (modem_info *) tty->driver_data;
1122 atemu *m = &info->emu;
1123
1124 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
1125 return 0;
1126 /* See isdn_tty_senddown() */
1127 atomic_inc(&info->xmit_lock);
1128 while (1) {
1129 c = count;
1130 if (c > info->xmit_size - info->xmit_count)
1131 c = info->xmit_size - info->xmit_count;
1132 if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
1133 c = dev->drv[info->isdn_driver]->maxbufsize;
1134 if (c <= 0)
1135 break;
1136 if ((info->online > 1)
1137 #ifdef CONFIG_ISDN_AUDIO
1138 || (info->vonline & 3)
1139 #endif
1140 ) {
1141 #ifdef CONFIG_ISDN_AUDIO
1142 if (!info->vonline)
1143 #endif
1144 isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
1145 &(m->pluscount),
1146 &(m->lastplus));
1147 memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
1148 #ifdef CONFIG_ISDN_AUDIO
1149 if (info->vonline) {
1150 int cc = isdn_tty_handleDLEdown(info, m, c);
1151 if (info->vonline & 2) {
1152 if (!cc) {
1153 /* If DLE decoding results in zero-transmit, but
1154 * c originally was non-zero, do a wakeup.
1155 */
1156 tty_wakeup(tty);
1157 info->msr |= UART_MSR_CTS;
1158 info->lsr |= UART_LSR_TEMT;
1159 }
1160 info->xmit_count += cc;
1161 }
1162 if ((info->vonline & 3) == 1) {
1163 /* Do NOT handle Ctrl-Q or Ctrl-S
1164 * when in full-duplex audio mode.
1165 */
1166 if (isdn_tty_end_vrx(buf, c)) {
1167 info->vonline &= ~1;
1168 #ifdef ISDN_DEBUG_MODEM_VOICE
1169 printk(KERN_DEBUG
1170 "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
1171 info->line);
1172 #endif
1173 isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
1174 }
1175 }
1176 } else
1177 if (TTY_IS_FCLASS1(info)) {
1178 int cc = isdn_tty_handleDLEdown(info, m, c);
1179
1180 if (info->vonline & 4) { /* ETX seen */
1181 isdn_ctrl c;
1182
1183 c.command = ISDN_CMD_FAXCMD;
1184 c.driver = info->isdn_driver;
1185 c.arg = info->isdn_channel;
1186 c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
1187 c.parm.aux.subcmd = ETX;
1188 isdn_command(&c);
1189 }
1190 info->vonline = 0;
1191 #ifdef ISDN_DEBUG_MODEM_VOICE
1192 printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
1193 #endif
1194 info->xmit_count += cc;
1195 } else
1196 #endif
1197 info->xmit_count += c;
1198 } else {
1199 info->msr |= UART_MSR_CTS;
1200 info->lsr |= UART_LSR_TEMT;
1201 if (info->dialing) {
1202 info->dialing = 0;
1203 #ifdef ISDN_DEBUG_MODEM_HUP
1204 printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
1205 #endif
1206 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
1207 isdn_tty_modem_hup(info, 1);
1208 } else
1209 c = isdn_tty_edit_at(buf, c, info);
1210 }
1211 buf += c;
1212 count -= c;
1213 total += c;
1214 }
1215 atomic_dec(&info->xmit_lock);
1216 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
1217 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
1218 isdn_tty_senddown(info);
1219 isdn_tty_tint(info);
1220 }
1221 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1222 }
1223 return total;
1224 }
1225
1226 static int
isdn_tty_write_room(struct tty_struct * tty)1227 isdn_tty_write_room(struct tty_struct *tty)
1228 {
1229 modem_info *info = (modem_info *) tty->driver_data;
1230 int ret;
1231
1232 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
1233 return 0;
1234 if (!info->online)
1235 return info->xmit_size;
1236 ret = info->xmit_size - info->xmit_count;
1237 return (ret < 0) ? 0 : ret;
1238 }
1239
1240 static int
isdn_tty_chars_in_buffer(struct tty_struct * tty)1241 isdn_tty_chars_in_buffer(struct tty_struct *tty)
1242 {
1243 modem_info *info = (modem_info *) tty->driver_data;
1244
1245 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
1246 return 0;
1247 if (!info->online)
1248 return 0;
1249 return (info->xmit_count);
1250 }
1251
1252 static void
isdn_tty_flush_buffer(struct tty_struct * tty)1253 isdn_tty_flush_buffer(struct tty_struct *tty)
1254 {
1255 modem_info *info;
1256
1257 if (!tty) {
1258 return;
1259 }
1260 info = (modem_info *) tty->driver_data;
1261 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
1262 return;
1263 }
1264 isdn_tty_cleanup_xmit(info);
1265 info->xmit_count = 0;
1266 tty_wakeup(tty);
1267 }
1268
1269 static void
isdn_tty_flush_chars(struct tty_struct * tty)1270 isdn_tty_flush_chars(struct tty_struct *tty)
1271 {
1272 modem_info *info = (modem_info *) tty->driver_data;
1273
1274 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
1275 return;
1276 if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
1277 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
1278 }
1279
1280 /*
1281 * ------------------------------------------------------------
1282 * isdn_tty_throttle()
1283 *
1284 * This routine is called by the upper-layer tty layer to signal that
1285 * incoming characters should be throttled.
1286 * ------------------------------------------------------------
1287 */
1288 static void
isdn_tty_throttle(struct tty_struct * tty)1289 isdn_tty_throttle(struct tty_struct *tty)
1290 {
1291 modem_info *info = (modem_info *) tty->driver_data;
1292
1293 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
1294 return;
1295 if (I_IXOFF(tty))
1296 info->x_char = STOP_CHAR(tty);
1297 info->mcr &= ~UART_MCR_RTS;
1298 }
1299
1300 static void
isdn_tty_unthrottle(struct tty_struct * tty)1301 isdn_tty_unthrottle(struct tty_struct *tty)
1302 {
1303 modem_info *info = (modem_info *) tty->driver_data;
1304
1305 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
1306 return;
1307 if (I_IXOFF(tty)) {
1308 if (info->x_char)
1309 info->x_char = 0;
1310 else
1311 info->x_char = START_CHAR(tty);
1312 }
1313 info->mcr |= UART_MCR_RTS;
1314 }
1315
1316 /*
1317 * ------------------------------------------------------------
1318 * isdn_tty_ioctl() and friends
1319 * ------------------------------------------------------------
1320 */
1321
1322 /*
1323 * isdn_tty_get_lsr_info - get line status register info
1324 *
1325 * Purpose: Let user call ioctl() to get info when the UART physically
1326 * is emptied. On bus types like RS485, the transmitter must
1327 * release the bus after transmitting. This must be done when
1328 * the transmit shift register is empty, not be done when the
1329 * transmit holding register is empty. This functionality
1330 * allows RS485 driver to be written in user space.
1331 */
1332 static int
isdn_tty_get_lsr_info(modem_info * info,uint __user * value)1333 isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
1334 {
1335 u_char status;
1336 uint result;
1337
1338 status = info->lsr;
1339 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1340 return put_user(result, value);
1341 }
1342
1343
1344 static int
isdn_tty_tiocmget(struct tty_struct * tty,struct file * file)1345 isdn_tty_tiocmget(struct tty_struct *tty, struct file *file)
1346 {
1347 modem_info *info = (modem_info *) tty->driver_data;
1348 u_char control, status;
1349
1350 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1351 return -ENODEV;
1352 if (tty->flags & (1 << TTY_IO_ERROR))
1353 return -EIO;
1354
1355 lock_kernel();
1356 #ifdef ISDN_DEBUG_MODEM_IOCTL
1357 printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
1358 #endif
1359
1360 control = info->mcr;
1361 status = info->msr;
1362 unlock_kernel();
1363 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1364 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1365 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1366 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1367 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1368 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1369 }
1370
1371 static int
isdn_tty_tiocmset(struct tty_struct * tty,struct file * file,unsigned int set,unsigned int clear)1372 isdn_tty_tiocmset(struct tty_struct *tty, struct file *file,
1373 unsigned int set, unsigned int clear)
1374 {
1375 modem_info *info = (modem_info *) tty->driver_data;
1376
1377 if (isdn_tty_paranoia_check(info, tty->name, __func__))
1378 return -ENODEV;
1379 if (tty->flags & (1 << TTY_IO_ERROR))
1380 return -EIO;
1381
1382 #ifdef ISDN_DEBUG_MODEM_IOCTL
1383 printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
1384 #endif
1385
1386 lock_kernel();
1387 if (set & TIOCM_RTS)
1388 info->mcr |= UART_MCR_RTS;
1389 if (set & TIOCM_DTR) {
1390 info->mcr |= UART_MCR_DTR;
1391 isdn_tty_modem_ncarrier(info);
1392 }
1393
1394 if (clear & TIOCM_RTS)
1395 info->mcr &= ~UART_MCR_RTS;
1396 if (clear & TIOCM_DTR) {
1397 info->mcr &= ~UART_MCR_DTR;
1398 if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
1399 isdn_tty_modem_reset_regs(info, 0);
1400 #ifdef ISDN_DEBUG_MODEM_HUP
1401 printk(KERN_DEBUG "Mhup in TIOCMSET\n");
1402 #endif
1403 if (info->online)
1404 info->ncarrier = 1;
1405 isdn_tty_modem_hup(info, 1);
1406 }
1407 }
1408 unlock_kernel();
1409 return 0;
1410 }
1411
1412 static int
isdn_tty_ioctl(struct tty_struct * tty,struct file * file,uint cmd,ulong arg)1413 isdn_tty_ioctl(struct tty_struct *tty, struct file *file,
1414 uint cmd, ulong arg)
1415 {
1416 modem_info *info = (modem_info *) tty->driver_data;
1417 int retval;
1418
1419 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
1420 return -ENODEV;
1421 if (tty->flags & (1 << TTY_IO_ERROR))
1422 return -EIO;
1423 switch (cmd) {
1424 case TCSBRK: /* SVID version: non-zero arg --> no break */
1425 #ifdef ISDN_DEBUG_MODEM_IOCTL
1426 printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
1427 #endif
1428 retval = tty_check_change(tty);
1429 if (retval)
1430 return retval;
1431 tty_wait_until_sent(tty, 0);
1432 return 0;
1433 case TCSBRKP: /* support for POSIX tcsendbreak() */
1434 #ifdef ISDN_DEBUG_MODEM_IOCTL
1435 printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
1436 #endif
1437 retval = tty_check_change(tty);
1438 if (retval)
1439 return retval;
1440 tty_wait_until_sent(tty, 0);
1441 return 0;
1442 case TIOCSERGETLSR: /* Get line status register */
1443 #ifdef ISDN_DEBUG_MODEM_IOCTL
1444 printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
1445 #endif
1446 return isdn_tty_get_lsr_info(info, (uint __user *) arg);
1447 default:
1448 #ifdef ISDN_DEBUG_MODEM_IOCTL
1449 printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
1450 #endif
1451 return -ENOIOCTLCMD;
1452 }
1453 return 0;
1454 }
1455
1456 static void
isdn_tty_set_termios(struct tty_struct * tty,struct ktermios * old_termios)1457 isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1458 {
1459 modem_info *info = (modem_info *) tty->driver_data;
1460
1461 if (!old_termios)
1462 isdn_tty_change_speed(info);
1463 else {
1464 if (tty->termios->c_cflag == old_termios->c_cflag &&
1465 tty->termios->c_ispeed == old_termios->c_ispeed &&
1466 tty->termios->c_ospeed == old_termios->c_ospeed)
1467 return;
1468 isdn_tty_change_speed(info);
1469 if ((old_termios->c_cflag & CRTSCTS) &&
1470 !(tty->termios->c_cflag & CRTSCTS))
1471 tty->hw_stopped = 0;
1472 }
1473 }
1474
1475 /*
1476 * ------------------------------------------------------------
1477 * isdn_tty_open() and friends
1478 * ------------------------------------------------------------
1479 */
1480 static int
isdn_tty_block_til_ready(struct tty_struct * tty,struct file * filp,modem_info * info)1481 isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
1482 {
1483 DECLARE_WAITQUEUE(wait, NULL);
1484 int do_clocal = 0;
1485 int retval;
1486
1487 /*
1488 * If the device is in the middle of being closed, then block
1489 * until it's done, and then try again.
1490 */
1491 if (tty_hung_up_p(filp) ||
1492 (info->flags & ISDN_ASYNC_CLOSING)) {
1493 if (info->flags & ISDN_ASYNC_CLOSING)
1494 interruptible_sleep_on(&info->close_wait);
1495 #ifdef MODEM_DO_RESTART
1496 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1497 return -EAGAIN;
1498 else
1499 return -ERESTARTSYS;
1500 #else
1501 return -EAGAIN;
1502 #endif
1503 }
1504 /*
1505 * If non-blocking mode is set, then make the check up front
1506 * and then exit.
1507 */
1508 if ((filp->f_flags & O_NONBLOCK) ||
1509 (tty->flags & (1 << TTY_IO_ERROR))) {
1510 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1511 return -EBUSY;
1512 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1513 return 0;
1514 }
1515 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
1516 if (info->normal_termios.c_cflag & CLOCAL)
1517 do_clocal = 1;
1518 } else {
1519 if (tty->termios->c_cflag & CLOCAL)
1520 do_clocal = 1;
1521 }
1522 /*
1523 * Block waiting for the carrier detect and the line to become
1524 * free (i.e., not in use by the callout). While we are in
1525 * this loop, info->count is dropped by one, so that
1526 * isdn_tty_close() knows when to free things. We restore it upon
1527 * exit, either normal or abnormal.
1528 */
1529 retval = 0;
1530 add_wait_queue(&info->open_wait, &wait);
1531 #ifdef ISDN_DEBUG_MODEM_OPEN
1532 printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
1533 info->line, info->count);
1534 #endif
1535 if (!(tty_hung_up_p(filp)))
1536 info->count--;
1537 info->blocked_open++;
1538 while (1) {
1539 set_current_state(TASK_INTERRUPTIBLE);
1540 if (tty_hung_up_p(filp) ||
1541 !(info->flags & ISDN_ASYNC_INITIALIZED)) {
1542 #ifdef MODEM_DO_RESTART
1543 if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
1544 retval = -EAGAIN;
1545 else
1546 retval = -ERESTARTSYS;
1547 #else
1548 retval = -EAGAIN;
1549 #endif
1550 break;
1551 }
1552 if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
1553 !(info->flags & ISDN_ASYNC_CLOSING) &&
1554 (do_clocal || (info->msr & UART_MSR_DCD))) {
1555 break;
1556 }
1557 if (signal_pending(current)) {
1558 retval = -ERESTARTSYS;
1559 break;
1560 }
1561 #ifdef ISDN_DEBUG_MODEM_OPEN
1562 printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
1563 info->line, info->count);
1564 #endif
1565 schedule();
1566 }
1567 current->state = TASK_RUNNING;
1568 remove_wait_queue(&info->open_wait, &wait);
1569 if (!tty_hung_up_p(filp))
1570 info->count++;
1571 info->blocked_open--;
1572 #ifdef ISDN_DEBUG_MODEM_OPEN
1573 printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
1574 info->line, info->count);
1575 #endif
1576 if (retval)
1577 return retval;
1578 info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
1579 return 0;
1580 }
1581
1582 /*
1583 * This routine is called whenever a serial port is opened. It
1584 * enables interrupts for a serial port, linking in its async structure into
1585 * the IRQ chain. It also performs the serial-specific
1586 * initialization for the tty structure.
1587 */
1588 static int
isdn_tty_open(struct tty_struct * tty,struct file * filp)1589 isdn_tty_open(struct tty_struct *tty, struct file *filp)
1590 {
1591 modem_info *info;
1592 int retval, line;
1593
1594 line = tty->index;
1595 if (line < 0 || line > ISDN_MAX_CHANNELS)
1596 return -ENODEV;
1597 info = &dev->mdm.info[line];
1598 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
1599 return -ENODEV;
1600 if (!try_module_get(info->owner)) {
1601 printk(KERN_WARNING "%s: cannot reserve module\n", __func__);
1602 return -ENODEV;
1603 }
1604 #ifdef ISDN_DEBUG_MODEM_OPEN
1605 printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
1606 info->count);
1607 #endif
1608 info->count++;
1609 tty->driver_data = info;
1610 info->tty = tty;
1611 /*
1612 * Start up serial port
1613 */
1614 retval = isdn_tty_startup(info);
1615 if (retval) {
1616 #ifdef ISDN_DEBUG_MODEM_OPEN
1617 printk(KERN_DEBUG "isdn_tty_open return after startup\n");
1618 #endif
1619 module_put(info->owner);
1620 return retval;
1621 }
1622 retval = isdn_tty_block_til_ready(tty, filp, info);
1623 if (retval) {
1624 #ifdef ISDN_DEBUG_MODEM_OPEN
1625 printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
1626 #endif
1627 module_put(info->owner);
1628 return retval;
1629 }
1630 #ifdef ISDN_DEBUG_MODEM_OPEN
1631 printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
1632 #endif
1633 dev->modempoll++;
1634 #ifdef ISDN_DEBUG_MODEM_OPEN
1635 printk(KERN_DEBUG "isdn_tty_open normal exit\n");
1636 #endif
1637 return 0;
1638 }
1639
1640 static void
isdn_tty_close(struct tty_struct * tty,struct file * filp)1641 isdn_tty_close(struct tty_struct *tty, struct file *filp)
1642 {
1643 modem_info *info = (modem_info *) tty->driver_data;
1644 ulong timeout;
1645
1646 if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
1647 return;
1648 if (tty_hung_up_p(filp)) {
1649 #ifdef ISDN_DEBUG_MODEM_OPEN
1650 printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
1651 #endif
1652 return;
1653 }
1654 if ((tty->count == 1) && (info->count != 1)) {
1655 /*
1656 * Uh, oh. tty->count is 1, which means that the tty
1657 * structure will be freed. Info->count should always
1658 * be one in these conditions. If it's greater than
1659 * one, we've got real problems, since it means the
1660 * serial port won't be shutdown.
1661 */
1662 printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
1663 "info->count is %d\n", info->count);
1664 info->count = 1;
1665 }
1666 if (--info->count < 0) {
1667 printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
1668 info->line, info->count);
1669 info->count = 0;
1670 }
1671 if (info->count) {
1672 #ifdef ISDN_DEBUG_MODEM_OPEN
1673 printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
1674 #endif
1675 module_put(info->owner);
1676 return;
1677 }
1678 info->flags |= ISDN_ASYNC_CLOSING;
1679 /*
1680 * Save the termios structure, since this port may have
1681 * separate termios for callout and dialin.
1682 */
1683 if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
1684 info->normal_termios = *tty->termios;
1685 if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
1686 info->callout_termios = *tty->termios;
1687
1688 tty->closing = 1;
1689 /*
1690 * At this point we stop accepting input. To do this, we
1691 * disable the receive line status interrupts, and tell the
1692 * interrupt driver to stop checking the data ready bit in the
1693 * line status register.
1694 */
1695 if (info->flags & ISDN_ASYNC_INITIALIZED) {
1696 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1697 /*
1698 * Before we drop DTR, make sure the UART transmitter
1699 * has completely drained; this is especially
1700 * important if there is a transmit FIFO!
1701 */
1702 timeout = jiffies + HZ;
1703 while (!(info->lsr & UART_LSR_TEMT)) {
1704 schedule_timeout_interruptible(20);
1705 if (time_after(jiffies,timeout))
1706 break;
1707 }
1708 }
1709 dev->modempoll--;
1710 isdn_tty_shutdown(info);
1711 isdn_tty_flush_buffer(tty);
1712 tty_ldisc_flush(tty);
1713 info->tty = NULL;
1714 info->ncarrier = 0;
1715 tty->closing = 0;
1716 module_put(info->owner);
1717 if (info->blocked_open) {
1718 msleep_interruptible(500);
1719 wake_up_interruptible(&info->open_wait);
1720 }
1721 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
1722 wake_up_interruptible(&info->close_wait);
1723 #ifdef ISDN_DEBUG_MODEM_OPEN
1724 printk(KERN_DEBUG "isdn_tty_close normal exit\n");
1725 #endif
1726 }
1727
1728 /*
1729 * isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
1730 */
1731 static void
isdn_tty_hangup(struct tty_struct * tty)1732 isdn_tty_hangup(struct tty_struct *tty)
1733 {
1734 modem_info *info = (modem_info *) tty->driver_data;
1735
1736 if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
1737 return;
1738 isdn_tty_shutdown(info);
1739 info->count = 0;
1740 info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
1741 info->tty = NULL;
1742 wake_up_interruptible(&info->open_wait);
1743 }
1744
1745 /* This routine initializes all emulator-data.
1746 */
1747 static void
isdn_tty_reset_profile(atemu * m)1748 isdn_tty_reset_profile(atemu * m)
1749 {
1750 m->profile[0] = 0;
1751 m->profile[1] = 0;
1752 m->profile[2] = 43;
1753 m->profile[3] = 13;
1754 m->profile[4] = 10;
1755 m->profile[5] = 8;
1756 m->profile[6] = 3;
1757 m->profile[7] = 60;
1758 m->profile[8] = 2;
1759 m->profile[9] = 6;
1760 m->profile[10] = 7;
1761 m->profile[11] = 70;
1762 m->profile[12] = 0x45;
1763 m->profile[13] = 4;
1764 m->profile[14] = ISDN_PROTO_L2_X75I;
1765 m->profile[15] = ISDN_PROTO_L3_TRANS;
1766 m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
1767 m->profile[17] = ISDN_MODEM_WINSIZE;
1768 m->profile[18] = 4;
1769 m->profile[19] = 0;
1770 m->profile[20] = 0;
1771 m->profile[23] = 0;
1772 m->pmsn[0] = '\0';
1773 m->plmsn[0] = '\0';
1774 }
1775
1776 #ifdef CONFIG_ISDN_AUDIO
1777 static void
isdn_tty_modem_reset_vpar(atemu * m)1778 isdn_tty_modem_reset_vpar(atemu * m)
1779 {
1780 m->vpar[0] = 2; /* Voice-device (2 = phone line) */
1781 m->vpar[1] = 0; /* Silence detection level (0 = none ) */
1782 m->vpar[2] = 70; /* Silence interval (7 sec. ) */
1783 m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
1784 m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
1785 m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
1786 }
1787 #endif
1788
1789 #ifdef CONFIG_ISDN_TTY_FAX
1790 static void
isdn_tty_modem_reset_faxpar(modem_info * info)1791 isdn_tty_modem_reset_faxpar(modem_info * info)
1792 {
1793 T30_s *f = info->fax;
1794
1795 f->code = 0;
1796 f->phase = ISDN_FAX_PHASE_IDLE;
1797 f->direction = 0;
1798 f->resolution = 1; /* fine */
1799 f->rate = 5; /* 14400 bit/s */
1800 f->width = 0;
1801 f->length = 0;
1802 f->compression = 0;
1803 f->ecm = 0;
1804 f->binary = 0;
1805 f->scantime = 0;
1806 memset(&f->id[0], 32, FAXIDLEN - 1);
1807 f->id[FAXIDLEN - 1] = 0;
1808 f->badlin = 0;
1809 f->badmul = 0;
1810 f->bor = 0;
1811 f->nbc = 0;
1812 f->cq = 0;
1813 f->cr = 0;
1814 f->ctcrty = 0;
1815 f->minsp = 0;
1816 f->phcto = 30;
1817 f->rel = 0;
1818 memset(&f->pollid[0], 32, FAXIDLEN - 1);
1819 f->pollid[FAXIDLEN - 1] = 0;
1820 }
1821 #endif
1822
1823 static void
isdn_tty_modem_reset_regs(modem_info * info,int force)1824 isdn_tty_modem_reset_regs(modem_info * info, int force)
1825 {
1826 atemu *m = &info->emu;
1827 if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
1828 memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
1829 memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
1830 memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
1831 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
1832 }
1833 #ifdef CONFIG_ISDN_AUDIO
1834 isdn_tty_modem_reset_vpar(m);
1835 #endif
1836 #ifdef CONFIG_ISDN_TTY_FAX
1837 isdn_tty_modem_reset_faxpar(info);
1838 #endif
1839 m->mdmcmdl = 0;
1840 }
1841
1842 static void
modem_write_profile(atemu * m)1843 modem_write_profile(atemu * m)
1844 {
1845 memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
1846 memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
1847 memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
1848 if (dev->profd)
1849 send_sig(SIGIO, dev->profd, 1);
1850 }
1851
1852 static const struct tty_operations modem_ops = {
1853 .open = isdn_tty_open,
1854 .close = isdn_tty_close,
1855 .write = isdn_tty_write,
1856 .flush_chars = isdn_tty_flush_chars,
1857 .write_room = isdn_tty_write_room,
1858 .chars_in_buffer = isdn_tty_chars_in_buffer,
1859 .flush_buffer = isdn_tty_flush_buffer,
1860 .ioctl = isdn_tty_ioctl,
1861 .throttle = isdn_tty_throttle,
1862 .unthrottle = isdn_tty_unthrottle,
1863 .set_termios = isdn_tty_set_termios,
1864 .hangup = isdn_tty_hangup,
1865 .tiocmget = isdn_tty_tiocmget,
1866 .tiocmset = isdn_tty_tiocmset,
1867 };
1868
1869 int
isdn_tty_modem_init(void)1870 isdn_tty_modem_init(void)
1871 {
1872 isdn_modem_t *m;
1873 int i, retval;
1874 modem_info *info;
1875
1876 m = &dev->mdm;
1877 m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
1878 if (!m->tty_modem)
1879 return -ENOMEM;
1880 m->tty_modem->name = "ttyI";
1881 m->tty_modem->major = ISDN_TTY_MAJOR;
1882 m->tty_modem->minor_start = 0;
1883 m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
1884 m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
1885 m->tty_modem->init_termios = tty_std_termios;
1886 m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1887 m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1888 m->tty_modem->driver_name = "isdn_tty";
1889 tty_set_operations(m->tty_modem, &modem_ops);
1890 retval = tty_register_driver(m->tty_modem);
1891 if (retval) {
1892 printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
1893 goto err;
1894 }
1895 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1896 info = &m->info[i];
1897 #ifdef CONFIG_ISDN_TTY_FAX
1898 if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
1899 printk(KERN_ERR "Could not allocate fax t30-buffer\n");
1900 retval = -ENOMEM;
1901 goto err_unregister;
1902 }
1903 #endif
1904 #ifdef MODULE
1905 info->owner = THIS_MODULE;
1906 #endif
1907 spin_lock_init(&info->readlock);
1908 sprintf(info->last_cause, "0000");
1909 sprintf(info->last_num, "none");
1910 info->last_dir = 0;
1911 info->last_lhup = 1;
1912 info->last_l2 = -1;
1913 info->last_si = 0;
1914 isdn_tty_reset_profile(&info->emu);
1915 isdn_tty_modem_reset_regs(info, 1);
1916 info->magic = ISDN_ASYNC_MAGIC;
1917 info->line = i;
1918 info->tty = NULL;
1919 info->x_char = 0;
1920 info->count = 0;
1921 info->blocked_open = 0;
1922 init_waitqueue_head(&info->open_wait);
1923 init_waitqueue_head(&info->close_wait);
1924 info->isdn_driver = -1;
1925 info->isdn_channel = -1;
1926 info->drv_index = -1;
1927 info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
1928 init_timer(&info->nc_timer);
1929 info->nc_timer.function = isdn_tty_modem_do_ncarrier;
1930 info->nc_timer.data = (unsigned long) info;
1931 skb_queue_head_init(&info->xmit_queue);
1932 #ifdef CONFIG_ISDN_AUDIO
1933 skb_queue_head_init(&info->dtmf_queue);
1934 #endif
1935 if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
1936 printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
1937 retval = -ENOMEM;
1938 goto err_unregister;
1939 }
1940 /* Make room for T.70 header */
1941 info->xmit_buf += 4;
1942 }
1943 return 0;
1944 err_unregister:
1945 for (i--; i >= 0; i--) {
1946 info = &m->info[i];
1947 #ifdef CONFIG_ISDN_TTY_FAX
1948 kfree(info->fax);
1949 #endif
1950 kfree(info->xmit_buf - 4);
1951 }
1952 tty_unregister_driver(m->tty_modem);
1953 err:
1954 put_tty_driver(m->tty_modem);
1955 m->tty_modem = NULL;
1956 return retval;
1957 }
1958
1959 void
isdn_tty_exit(void)1960 isdn_tty_exit(void)
1961 {
1962 modem_info *info;
1963 int i;
1964
1965 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1966 info = &dev->mdm.info[i];
1967 isdn_tty_cleanup_xmit(info);
1968 #ifdef CONFIG_ISDN_TTY_FAX
1969 kfree(info->fax);
1970 #endif
1971 kfree(info->xmit_buf - 4);
1972 }
1973 tty_unregister_driver(dev->mdm.tty_modem);
1974 put_tty_driver(dev->mdm.tty_modem);
1975 dev->mdm.tty_modem = NULL;
1976 }
1977
1978
1979 /*
1980 * isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
1981 * match the MSN against the MSNs (glob patterns) defined for tty_emulator,
1982 * and return 0 for match, 1 for no match, 2 if MSN could match if longer.
1983 */
1984
1985 static int
isdn_tty_match_icall(char * cid,atemu * emu,int di)1986 isdn_tty_match_icall(char *cid, atemu *emu, int di)
1987 {
1988 #ifdef ISDN_DEBUG_MODEM_ICALL
1989 printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
1990 emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
1991 emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
1992 #endif
1993 if (strlen(emu->lmsn)) {
1994 char *p = emu->lmsn;
1995 char *q;
1996 int tmp;
1997 int ret = 0;
1998
1999 while (1) {
2000 if ((q = strchr(p, ';')))
2001 *q = '\0';
2002 if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
2003 ret = tmp;
2004 #ifdef ISDN_DEBUG_MODEM_ICALL
2005 printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
2006 p, isdn_map_eaz2msn(emu->msn, di), tmp);
2007 #endif
2008 if (q) {
2009 *q = ';';
2010 p = q;
2011 p++;
2012 }
2013 if (!tmp)
2014 return 0;
2015 if (!q)
2016 break;
2017 }
2018 return ret;
2019 } else {
2020 int tmp;
2021 tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
2022 #ifdef ISDN_DEBUG_MODEM_ICALL
2023 printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
2024 isdn_map_eaz2msn(emu->msn, di), tmp);
2025 #endif
2026 return tmp;
2027 }
2028 }
2029
2030 /*
2031 * An incoming call-request has arrived.
2032 * Search the tty-devices for an appropriate device and bind
2033 * it to the ISDN-Channel.
2034 * Return:
2035 *
2036 * 0 = No matching device found.
2037 * 1 = A matching device found.
2038 * 3 = No match found, but eventually would match, if
2039 * CID is longer.
2040 */
2041 int
isdn_tty_find_icall(int di,int ch,setup_parm * setup)2042 isdn_tty_find_icall(int di, int ch, setup_parm *setup)
2043 {
2044 char *eaz;
2045 int i;
2046 int wret;
2047 int idx;
2048 int si1;
2049 int si2;
2050 char *nr;
2051 ulong flags;
2052
2053 if (!setup->phone[0]) {
2054 nr = "0";
2055 printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
2056 } else
2057 nr = setup->phone;
2058 si1 = (int) setup->si1;
2059 si2 = (int) setup->si2;
2060 if (!setup->eazmsn[0]) {
2061 printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
2062 eaz = "0";
2063 } else
2064 eaz = setup->eazmsn;
2065 #ifdef ISDN_DEBUG_MODEM_ICALL
2066 printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
2067 #endif
2068 wret = 0;
2069 spin_lock_irqsave(&dev->lock, flags);
2070 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2071 modem_info *info = &dev->mdm.info[i];
2072
2073 if (info->count == 0)
2074 continue;
2075 if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
2076 (info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
2077 idx = isdn_dc2minor(di, ch);
2078 #ifdef ISDN_DEBUG_MODEM_ICALL
2079 printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
2080 printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
2081 info->flags, info->isdn_driver, info->isdn_channel,
2082 dev->usage[idx]);
2083 #endif
2084 if (
2085 #ifndef FIX_FILE_TRANSFER
2086 (info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
2087 #endif
2088 (info->isdn_driver == -1) &&
2089 (info->isdn_channel == -1) &&
2090 (USG_NONE(dev->usage[idx]))) {
2091 int matchret;
2092
2093 if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
2094 wret = matchret;
2095 if (!matchret) { /* EAZ is matching */
2096 info->isdn_driver = di;
2097 info->isdn_channel = ch;
2098 info->drv_index = idx;
2099 dev->m_idx[idx] = info->line;
2100 dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2101 dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
2102 strcpy(dev->num[idx], nr);
2103 strcpy(info->emu.cpn, eaz);
2104 info->emu.mdmreg[REG_SI1I] = si2bit[si1];
2105 info->emu.mdmreg[REG_PLAN] = setup->plan;
2106 info->emu.mdmreg[REG_SCREEN] = setup->screen;
2107 isdn_info_update();
2108 spin_unlock_irqrestore(&dev->lock, flags);
2109 printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
2110 info->line);
2111 info->msr |= UART_MSR_RI;
2112 isdn_tty_modem_result(RESULT_RING, info);
2113 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
2114 return 1;
2115 }
2116 }
2117 }
2118 }
2119 spin_unlock_irqrestore(&dev->lock, flags);
2120 printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
2121 ((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
2122 return (wret == 2)?3:0;
2123 }
2124
2125 #define TTY_IS_ACTIVE(info) \
2126 (info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
2127
2128 int
isdn_tty_stat_callback(int i,isdn_ctrl * c)2129 isdn_tty_stat_callback(int i, isdn_ctrl *c)
2130 {
2131 int mi;
2132 modem_info *info;
2133 char *e;
2134
2135 if (i < 0)
2136 return 0;
2137 if ((mi = dev->m_idx[i]) >= 0) {
2138 info = &dev->mdm.info[mi];
2139 switch (c->command) {
2140 case ISDN_STAT_CINF:
2141 printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
2142 info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
2143 if (e == (char *)c->parm.num)
2144 info->emu.charge = 0;
2145
2146 break;
2147 case ISDN_STAT_BSENT:
2148 #ifdef ISDN_TTY_STAT_DEBUG
2149 printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
2150 #endif
2151 if ((info->isdn_driver == c->driver) &&
2152 (info->isdn_channel == c->arg)) {
2153 info->msr |= UART_MSR_CTS;
2154 if (info->send_outstanding)
2155 if (!(--info->send_outstanding))
2156 info->lsr |= UART_LSR_TEMT;
2157 isdn_tty_tint(info);
2158 return 1;
2159 }
2160 break;
2161 case ISDN_STAT_CAUSE:
2162 #ifdef ISDN_TTY_STAT_DEBUG
2163 printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
2164 #endif
2165 /* Signal cause to tty-device */
2166 strncpy(info->last_cause, c->parm.num, 5);
2167 return 1;
2168 case ISDN_STAT_DISPLAY:
2169 #ifdef ISDN_TTY_STAT_DEBUG
2170 printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
2171 #endif
2172 /* Signal display to tty-device */
2173 if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
2174 !(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
2175 isdn_tty_at_cout("\r\n", info);
2176 isdn_tty_at_cout("DISPLAY: ", info);
2177 isdn_tty_at_cout(c->parm.display, info);
2178 isdn_tty_at_cout("\r\n", info);
2179 }
2180 return 1;
2181 case ISDN_STAT_DCONN:
2182 #ifdef ISDN_TTY_STAT_DEBUG
2183 printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
2184 #endif
2185 if (TTY_IS_ACTIVE(info)) {
2186 if (info->dialing == 1) {
2187 info->dialing = 2;
2188 return 1;
2189 }
2190 }
2191 break;
2192 case ISDN_STAT_DHUP:
2193 #ifdef ISDN_TTY_STAT_DEBUG
2194 printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
2195 #endif
2196 if (TTY_IS_ACTIVE(info)) {
2197 if (info->dialing == 1)
2198 isdn_tty_modem_result(RESULT_BUSY, info);
2199 if (info->dialing > 1)
2200 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
2201 info->dialing = 0;
2202 #ifdef ISDN_DEBUG_MODEM_HUP
2203 printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
2204 #endif
2205 isdn_tty_modem_hup(info, 0);
2206 return 1;
2207 }
2208 break;
2209 case ISDN_STAT_BCONN:
2210 #ifdef ISDN_TTY_STAT_DEBUG
2211 printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
2212 #endif
2213 /* Wake up any processes waiting
2214 * for incoming call of this device when
2215 * DCD follow the state of incoming carrier
2216 */
2217 if (info->blocked_open &&
2218 (info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
2219 wake_up_interruptible(&info->open_wait);
2220 }
2221
2222 /* Schedule CONNECT-Message to any tty
2223 * waiting for it and
2224 * set DCD-bit of its modem-status.
2225 */
2226 if (TTY_IS_ACTIVE(info) ||
2227 (info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
2228 info->msr |= UART_MSR_DCD;
2229 info->emu.charge = 0;
2230 if (info->dialing & 0xf)
2231 info->last_dir = 1;
2232 else
2233 info->last_dir = 0;
2234 info->dialing = 0;
2235 info->rcvsched = 1;
2236 if (USG_MODEM(dev->usage[i])) {
2237 if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
2238 strcpy(info->emu.connmsg, c->parm.num);
2239 isdn_tty_modem_result(RESULT_CONNECT, info);
2240 } else
2241 isdn_tty_modem_result(RESULT_CONNECT64000, info);
2242 }
2243 if (USG_VOICE(dev->usage[i]))
2244 isdn_tty_modem_result(RESULT_VCON, info);
2245 return 1;
2246 }
2247 break;
2248 case ISDN_STAT_BHUP:
2249 #ifdef ISDN_TTY_STAT_DEBUG
2250 printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
2251 #endif
2252 if (TTY_IS_ACTIVE(info)) {
2253 #ifdef ISDN_DEBUG_MODEM_HUP
2254 printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
2255 #endif
2256 isdn_tty_modem_hup(info, 0);
2257 return 1;
2258 }
2259 break;
2260 case ISDN_STAT_NODCH:
2261 #ifdef ISDN_TTY_STAT_DEBUG
2262 printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
2263 #endif
2264 if (TTY_IS_ACTIVE(info)) {
2265 if (info->dialing) {
2266 info->dialing = 0;
2267 info->last_l2 = -1;
2268 info->last_si = 0;
2269 sprintf(info->last_cause, "0000");
2270 isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
2271 }
2272 isdn_tty_modem_hup(info, 0);
2273 return 1;
2274 }
2275 break;
2276 case ISDN_STAT_UNLOAD:
2277 #ifdef ISDN_TTY_STAT_DEBUG
2278 printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
2279 #endif
2280 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2281 info = &dev->mdm.info[i];
2282 if (info->isdn_driver == c->driver) {
2283 if (info->online)
2284 isdn_tty_modem_hup(info, 1);
2285 }
2286 }
2287 return 1;
2288 #ifdef CONFIG_ISDN_TTY_FAX
2289 case ISDN_STAT_FAXIND:
2290 if (TTY_IS_ACTIVE(info)) {
2291 isdn_tty_fax_command(info, c);
2292 }
2293 break;
2294 #endif
2295 #ifdef CONFIG_ISDN_AUDIO
2296 case ISDN_STAT_AUDIO:
2297 if (TTY_IS_ACTIVE(info)) {
2298 switch(c->parm.num[0]) {
2299 case ISDN_AUDIO_DTMF:
2300 if (info->vonline) {
2301 isdn_audio_put_dle_code(info,
2302 c->parm.num[1]);
2303 }
2304 break;
2305 }
2306 }
2307 break;
2308 #endif
2309 }
2310 }
2311 return 0;
2312 }
2313
2314 /*********************************************************************
2315 Modem-Emulator-Routines
2316 *********************************************************************/
2317
2318 #define cmdchar(c) ((c>=' ')&&(c<=0x7f))
2319
2320 /*
2321 * Put a message from the AT-emulator into receive-buffer of tty,
2322 * convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
2323 */
2324 void
isdn_tty_at_cout(char * msg,modem_info * info)2325 isdn_tty_at_cout(char *msg, modem_info * info)
2326 {
2327 struct tty_struct *tty;
2328 atemu *m = &info->emu;
2329 char *p;
2330 char c;
2331 u_long flags;
2332 struct sk_buff *skb = NULL;
2333 char *sp = NULL;
2334 int l;
2335
2336 if (!msg) {
2337 printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
2338 return;
2339 }
2340
2341 l = strlen(msg);
2342
2343 spin_lock_irqsave(&info->readlock, flags);
2344 tty = info->tty;
2345 if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
2346 spin_unlock_irqrestore(&info->readlock, flags);
2347 return;
2348 }
2349
2350 /* use queue instead of direct, if online and */
2351 /* data is in queue or buffer is full */
2352 if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
2353 !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
2354 skb = alloc_skb(l, GFP_ATOMIC);
2355 if (!skb) {
2356 spin_unlock_irqrestore(&info->readlock, flags);
2357 return;
2358 }
2359 sp = skb_put(skb, l);
2360 #ifdef CONFIG_ISDN_AUDIO
2361 ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
2362 ISDN_AUDIO_SKB_LOCK(skb) = 0;
2363 #endif
2364 }
2365
2366 for (p = msg; *p; p++) {
2367 switch (*p) {
2368 case '\r':
2369 c = m->mdmreg[REG_CR];
2370 break;
2371 case '\n':
2372 c = m->mdmreg[REG_LF];
2373 break;
2374 case '\b':
2375 c = m->mdmreg[REG_BS];
2376 break;
2377 default:
2378 c = *p;
2379 }
2380 if (skb) {
2381 *sp++ = c;
2382 } else {
2383 if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
2384 break;
2385 }
2386 }
2387 if (skb) {
2388 __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
2389 dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
2390 spin_unlock_irqrestore(&info->readlock, flags);
2391 /* Schedule dequeuing */
2392 if (dev->modempoll && info->rcvsched)
2393 isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
2394
2395 } else {
2396 spin_unlock_irqrestore(&info->readlock, flags);
2397 tty_flip_buffer_push(tty);
2398 }
2399 }
2400
2401 /*
2402 * Perform ATH Hangup
2403 */
2404 static void
isdn_tty_on_hook(modem_info * info)2405 isdn_tty_on_hook(modem_info * info)
2406 {
2407 if (info->isdn_channel >= 0) {
2408 #ifdef ISDN_DEBUG_MODEM_HUP
2409 printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
2410 #endif
2411 isdn_tty_modem_hup(info, 1);
2412 }
2413 }
2414
2415 static void
isdn_tty_off_hook(void)2416 isdn_tty_off_hook(void)
2417 {
2418 printk(KERN_DEBUG "isdn_tty_off_hook\n");
2419 }
2420
2421 #define PLUSWAIT1 (HZ/2) /* 0.5 sec. */
2422 #define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */
2423
2424 /*
2425 * Check Buffer for Modem-escape-sequence, activate timer-callback to
2426 * isdn_tty_modem_escape() if sequence found.
2427 *
2428 * Parameters:
2429 * p pointer to databuffer
2430 * plus escape-character
2431 * count length of buffer
2432 * pluscount count of valid escape-characters so far
2433 * lastplus timestamp of last character
2434 */
2435 static void
isdn_tty_check_esc(const u_char * p,u_char plus,int count,int * pluscount,u_long * lastplus)2436 isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
2437 u_long *lastplus)
2438 {
2439 if (plus > 127)
2440 return;
2441 if (count > 3) {
2442 p += count - 3;
2443 count = 3;
2444 *pluscount = 0;
2445 }
2446 while (count > 0) {
2447 if (*(p++) == plus) {
2448 if ((*pluscount)++) {
2449 /* Time since last '+' > 0.5 sec. ? */
2450 if (time_after(jiffies, *lastplus + PLUSWAIT1))
2451 *pluscount = 1;
2452 } else {
2453 /* Time since last non-'+' < 1.5 sec. ? */
2454 if (time_before(jiffies, *lastplus + PLUSWAIT2))
2455 *pluscount = 0;
2456 }
2457 if ((*pluscount == 3) && (count == 1))
2458 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
2459 if (*pluscount > 3)
2460 *pluscount = 1;
2461 } else
2462 *pluscount = 0;
2463 *lastplus = jiffies;
2464 count--;
2465 }
2466 }
2467
2468 /*
2469 * Return result of AT-emulator to tty-receive-buffer, depending on
2470 * modem-register 12, bit 0 and 1.
2471 * For CONNECT-messages also switch to online-mode.
2472 * For RING-message handle auto-ATA if register 0 != 0
2473 */
2474
2475 static void
isdn_tty_modem_result(int code,modem_info * info)2476 isdn_tty_modem_result(int code, modem_info * info)
2477 {
2478 atemu *m = &info->emu;
2479 static char *msg[] =
2480 {"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
2481 "CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
2482 "RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
2483 char s[ISDN_MSNLEN+10];
2484
2485 switch (code) {
2486 case RESULT_RING:
2487 m->mdmreg[REG_RINGCNT]++;
2488 if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
2489 /* Automatically accept incoming call */
2490 isdn_tty_cmd_ATA(info);
2491 break;
2492 case RESULT_NO_CARRIER:
2493 #ifdef ISDN_DEBUG_MODEM_HUP
2494 printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
2495 (info->flags & ISDN_ASYNC_CLOSING),
2496 (!info->tty));
2497 #endif
2498 m->mdmreg[REG_RINGCNT] = 0;
2499 del_timer(&info->nc_timer);
2500 info->ncarrier = 0;
2501 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2502 return;
2503 }
2504 #ifdef CONFIG_ISDN_AUDIO
2505 if (info->vonline & 1) {
2506 #ifdef ISDN_DEBUG_MODEM_VOICE
2507 printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
2508 info->line);
2509 #endif
2510 /* voice-recording, add DLE-ETX */
2511 isdn_tty_at_cout("\020\003", info);
2512 }
2513 if (info->vonline & 2) {
2514 #ifdef ISDN_DEBUG_MODEM_VOICE
2515 printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
2516 info->line);
2517 #endif
2518 /* voice-playing, add DLE-DC4 */
2519 isdn_tty_at_cout("\020\024", info);
2520 }
2521 #endif
2522 break;
2523 case RESULT_CONNECT:
2524 case RESULT_CONNECT64000:
2525 sprintf(info->last_cause, "0000");
2526 if (!info->online)
2527 info->online = 2;
2528 break;
2529 case RESULT_VCON:
2530 #ifdef ISDN_DEBUG_MODEM_VOICE
2531 printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
2532 info->line);
2533 #endif
2534 sprintf(info->last_cause, "0000");
2535 if (!info->online)
2536 info->online = 1;
2537 break;
2538 } /* switch(code) */
2539
2540 if (m->mdmreg[REG_RESP] & BIT_RESP) {
2541 /* Show results */
2542 if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
2543 /* Show numeric results only */
2544 sprintf(s, "\r\n%d\r\n", code);
2545 isdn_tty_at_cout(s, info);
2546 } else {
2547 if (code == RESULT_RING) {
2548 /* return if "show RUNG" and ringcounter>1 */
2549 if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
2550 (m->mdmreg[REG_RINGCNT] > 1))
2551 return;
2552 /* print CID, _before_ _every_ ring */
2553 if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
2554 isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
2555 isdn_tty_at_cout(dev->num[info->drv_index], info);
2556 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2557 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2558 isdn_tty_at_cout(info->emu.cpn, info);
2559 }
2560 }
2561 }
2562 isdn_tty_at_cout("\r\n", info);
2563 isdn_tty_at_cout(msg[code], info);
2564 switch (code) {
2565 case RESULT_CONNECT:
2566 switch (m->mdmreg[REG_L2PROT]) {
2567 case ISDN_PROTO_L2_MODEM:
2568 isdn_tty_at_cout(" ", info);
2569 isdn_tty_at_cout(m->connmsg, info);
2570 break;
2571 }
2572 break;
2573 case RESULT_RING:
2574 /* Append CPN, if enabled */
2575 if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
2576 sprintf(s, "/%s", m->cpn);
2577 isdn_tty_at_cout(s, info);
2578 }
2579 /* Print CID only once, _after_ 1st RING */
2580 if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
2581 (m->mdmreg[REG_RINGCNT] == 1)) {
2582 isdn_tty_at_cout("\r\n", info);
2583 isdn_tty_at_cout("CALLER NUMBER: ", info);
2584 isdn_tty_at_cout(dev->num[info->drv_index], info);
2585 if (m->mdmreg[REG_CDN] & BIT_CDN) {
2586 isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
2587 isdn_tty_at_cout(info->emu.cpn, info);
2588 }
2589 }
2590 break;
2591 case RESULT_NO_CARRIER:
2592 case RESULT_NO_DIALTONE:
2593 case RESULT_BUSY:
2594 case RESULT_NO_ANSWER:
2595 m->mdmreg[REG_RINGCNT] = 0;
2596 /* Append Cause-Message if enabled */
2597 if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
2598 sprintf(s, "/%s", info->last_cause);
2599 isdn_tty_at_cout(s, info);
2600 }
2601 break;
2602 case RESULT_CONNECT64000:
2603 /* Append Protocol to CONNECT message */
2604 switch (m->mdmreg[REG_L2PROT]) {
2605 case ISDN_PROTO_L2_X75I:
2606 case ISDN_PROTO_L2_X75UI:
2607 case ISDN_PROTO_L2_X75BUI:
2608 isdn_tty_at_cout("/X.75", info);
2609 break;
2610 case ISDN_PROTO_L2_HDLC:
2611 isdn_tty_at_cout("/HDLC", info);
2612 break;
2613 case ISDN_PROTO_L2_V11096:
2614 isdn_tty_at_cout("/V110/9600", info);
2615 break;
2616 case ISDN_PROTO_L2_V11019:
2617 isdn_tty_at_cout("/V110/19200", info);
2618 break;
2619 case ISDN_PROTO_L2_V11038:
2620 isdn_tty_at_cout("/V110/38400", info);
2621 break;
2622 }
2623 if (m->mdmreg[REG_T70] & BIT_T70) {
2624 isdn_tty_at_cout("/T.70", info);
2625 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2626 isdn_tty_at_cout("+", info);
2627 }
2628 break;
2629 }
2630 isdn_tty_at_cout("\r\n", info);
2631 }
2632 }
2633 if (code == RESULT_NO_CARRIER) {
2634 if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
2635 return;
2636 }
2637 #ifdef CONFIG_ISDN_AUDIO
2638 if ( !info->vonline )
2639 tty_ldisc_flush(info->tty);
2640 #else
2641 tty_ldisc_flush(info->tty);
2642 #endif
2643 if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
2644 (!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
2645 (info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
2646 tty_hangup(info->tty);
2647 }
2648 }
2649 }
2650
2651
2652 /*
2653 * Display a modem-register-value.
2654 */
2655 static void
isdn_tty_show_profile(int ridx,modem_info * info)2656 isdn_tty_show_profile(int ridx, modem_info * info)
2657 {
2658 char v[6];
2659
2660 sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
2661 isdn_tty_at_cout(v, info);
2662 }
2663
2664 /*
2665 * Get MSN-string from char-pointer, set pointer to end of number
2666 */
2667 static void
isdn_tty_get_msnstr(char * n,char ** p)2668 isdn_tty_get_msnstr(char *n, char **p)
2669 {
2670 int limit = ISDN_MSNLEN - 1;
2671
2672 while (((*p[0] >= '0' && *p[0] <= '9') ||
2673 /* Why a comma ??? */
2674 (*p[0] == ',') || (*p[0] == ':')) &&
2675 (limit--))
2676 *n++ = *p[0]++;
2677 *n = '\0';
2678 }
2679
2680 /*
2681 * Get phone-number from modem-commandbuffer
2682 */
2683 static void
isdn_tty_getdial(char * p,char * q,int cnt)2684 isdn_tty_getdial(char *p, char *q,int cnt)
2685 {
2686 int first = 1;
2687 int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
2688 buffer overflow */
2689
2690 while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt>0) {
2691 if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
2692 ((*p == 'R') && first) ||
2693 (*p == '*') || (*p == '#')) {
2694 *q++ = *p;
2695 limit--;
2696 }
2697 if(!limit)
2698 break;
2699 p++;
2700 first = 0;
2701 }
2702 *q = 0;
2703 }
2704
2705 #define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
2706 #define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
2707
2708 static void
isdn_tty_report(modem_info * info)2709 isdn_tty_report(modem_info * info)
2710 {
2711 atemu *m = &info->emu;
2712 char s[80];
2713
2714 isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
2715 sprintf(s, " Remote Number: %s\r\n", info->last_num);
2716 isdn_tty_at_cout(s, info);
2717 sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
2718 isdn_tty_at_cout(s, info);
2719 isdn_tty_at_cout(" Layer-2 Protocol: ", info);
2720 switch (info->last_l2) {
2721 case ISDN_PROTO_L2_X75I:
2722 isdn_tty_at_cout("X.75i", info);
2723 break;
2724 case ISDN_PROTO_L2_X75UI:
2725 isdn_tty_at_cout("X.75ui", info);
2726 break;
2727 case ISDN_PROTO_L2_X75BUI:
2728 isdn_tty_at_cout("X.75bui", info);
2729 break;
2730 case ISDN_PROTO_L2_HDLC:
2731 isdn_tty_at_cout("HDLC", info);
2732 break;
2733 case ISDN_PROTO_L2_V11096:
2734 isdn_tty_at_cout("V.110 9600 Baud", info);
2735 break;
2736 case ISDN_PROTO_L2_V11019:
2737 isdn_tty_at_cout("V.110 19200 Baud", info);
2738 break;
2739 case ISDN_PROTO_L2_V11038:
2740 isdn_tty_at_cout("V.110 38400 Baud", info);
2741 break;
2742 case ISDN_PROTO_L2_TRANS:
2743 isdn_tty_at_cout("transparent", info);
2744 break;
2745 case ISDN_PROTO_L2_MODEM:
2746 isdn_tty_at_cout("modem", info);
2747 break;
2748 case ISDN_PROTO_L2_FAX:
2749 isdn_tty_at_cout("fax", info);
2750 break;
2751 default:
2752 isdn_tty_at_cout("unknown", info);
2753 break;
2754 }
2755 if (m->mdmreg[REG_T70] & BIT_T70) {
2756 isdn_tty_at_cout("/T.70", info);
2757 if (m->mdmreg[REG_T70] & BIT_T70_EXT)
2758 isdn_tty_at_cout("+", info);
2759 }
2760 isdn_tty_at_cout("\r\n", info);
2761 isdn_tty_at_cout(" Service: ", info);
2762 switch (info->last_si) {
2763 case 1:
2764 isdn_tty_at_cout("audio\r\n", info);
2765 break;
2766 case 5:
2767 isdn_tty_at_cout("btx\r\n", info);
2768 break;
2769 case 7:
2770 isdn_tty_at_cout("data\r\n", info);
2771 break;
2772 default:
2773 sprintf(s, "%d\r\n", info->last_si);
2774 isdn_tty_at_cout(s, info);
2775 break;
2776 }
2777 sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
2778 isdn_tty_at_cout(s, info);
2779 sprintf(s, " Last cause: %s\r\n", info->last_cause);
2780 isdn_tty_at_cout(s, info);
2781 }
2782
2783 /*
2784 * Parse AT&.. commands.
2785 */
2786 static int
isdn_tty_cmd_ATand(char ** p,modem_info * info)2787 isdn_tty_cmd_ATand(char **p, modem_info * info)
2788 {
2789 atemu *m = &info->emu;
2790 int i;
2791 char rb[100];
2792
2793 #define MAXRB (sizeof(rb) - 1)
2794
2795 switch (*p[0]) {
2796 case 'B':
2797 /* &B - Set Buffersize */
2798 p[0]++;
2799 i = isdn_getnum(p);
2800 if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
2801 PARSE_ERROR1;
2802 #ifdef CONFIG_ISDN_AUDIO
2803 if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
2804 PARSE_ERROR1;
2805 #endif
2806 m->mdmreg[REG_PSIZE] = i / 16;
2807 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2808 switch (m->mdmreg[REG_L2PROT]) {
2809 case ISDN_PROTO_L2_V11096:
2810 case ISDN_PROTO_L2_V11019:
2811 case ISDN_PROTO_L2_V11038:
2812 info->xmit_size /= 10;
2813 }
2814 break;
2815 case 'C':
2816 /* &C - DCD Status */
2817 p[0]++;
2818 switch (isdn_getnum(p)) {
2819 case 0:
2820 m->mdmreg[REG_DCD] &= ~BIT_DCD;
2821 break;
2822 case 1:
2823 m->mdmreg[REG_DCD] |= BIT_DCD;
2824 break;
2825 default:
2826 PARSE_ERROR1
2827 }
2828 break;
2829 case 'D':
2830 /* &D - Set DTR-Low-behavior */
2831 p[0]++;
2832 switch (isdn_getnum(p)) {
2833 case 0:
2834 m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
2835 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2836 break;
2837 case 2:
2838 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2839 m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
2840 break;
2841 case 3:
2842 m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
2843 m->mdmreg[REG_DTRR] |= BIT_DTRR;
2844 break;
2845 default:
2846 PARSE_ERROR1
2847 }
2848 break;
2849 case 'E':
2850 /* &E -Set EAZ/MSN */
2851 p[0]++;
2852 isdn_tty_get_msnstr(m->msn, p);
2853 break;
2854 case 'F':
2855 /* &F -Set Factory-Defaults */
2856 p[0]++;
2857 if (info->msr & UART_MSR_DCD)
2858 PARSE_ERROR1;
2859 isdn_tty_reset_profile(m);
2860 isdn_tty_modem_reset_regs(info, 1);
2861 break;
2862 #ifdef DUMMY_HAYES_AT
2863 case 'K':
2864 /* only for be compilant with common scripts */
2865 /* &K Flowcontrol - no function */
2866 p[0]++;
2867 isdn_getnum(p);
2868 break;
2869 #endif
2870 case 'L':
2871 /* &L -Set Numbers to listen on */
2872 p[0]++;
2873 i = 0;
2874 while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
2875 (i < ISDN_LMSNLEN - 1))
2876 m->lmsn[i++] = *p[0]++;
2877 m->lmsn[i] = '\0';
2878 break;
2879 case 'R':
2880 /* &R - Set V.110 bitrate adaption */
2881 p[0]++;
2882 i = isdn_getnum(p);
2883 switch (i) {
2884 case 0:
2885 /* Switch off V.110, back to X.75 */
2886 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2887 m->mdmreg[REG_SI2] = 0;
2888 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2889 break;
2890 case 9600:
2891 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
2892 m->mdmreg[REG_SI2] = 197;
2893 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2894 break;
2895 case 19200:
2896 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
2897 m->mdmreg[REG_SI2] = 199;
2898 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2899 break;
2900 case 38400:
2901 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
2902 m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
2903 info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
2904 break;
2905 default:
2906 PARSE_ERROR1;
2907 }
2908 /* Switch off T.70 */
2909 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2910 /* Set Service 7 */
2911 m->mdmreg[REG_SI1] |= 4;
2912 break;
2913 case 'S':
2914 /* &S - Set Windowsize */
2915 p[0]++;
2916 i = isdn_getnum(p);
2917 if ((i > 0) && (i < 9))
2918 m->mdmreg[REG_WSIZE] = i;
2919 else
2920 PARSE_ERROR1;
2921 break;
2922 case 'V':
2923 /* &V - Show registers */
2924 p[0]++;
2925 isdn_tty_at_cout("\r\n", info);
2926 for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
2927 sprintf(rb, "S%02d=%03d%s", i,
2928 m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
2929 isdn_tty_at_cout(rb, info);
2930 }
2931 sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
2932 strlen(m->msn) ? m->msn : "None");
2933 isdn_tty_at_cout(rb, info);
2934 if (strlen(m->lmsn)) {
2935 isdn_tty_at_cout("\r\nListen: ", info);
2936 isdn_tty_at_cout(m->lmsn, info);
2937 isdn_tty_at_cout("\r\n", info);
2938 }
2939 break;
2940 case 'W':
2941 /* &W - Write Profile */
2942 p[0]++;
2943 switch (*p[0]) {
2944 case '0':
2945 p[0]++;
2946 modem_write_profile(m);
2947 break;
2948 default:
2949 PARSE_ERROR1;
2950 }
2951 break;
2952 case 'X':
2953 /* &X - Switch to BTX-Mode and T.70 */
2954 p[0]++;
2955 switch (isdn_getnum(p)) {
2956 case 0:
2957 m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
2958 info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
2959 break;
2960 case 1:
2961 m->mdmreg[REG_T70] |= BIT_T70;
2962 m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
2963 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2964 info->xmit_size = 112;
2965 m->mdmreg[REG_SI1] = 4;
2966 m->mdmreg[REG_SI2] = 0;
2967 break;
2968 case 2:
2969 m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
2970 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
2971 info->xmit_size = 112;
2972 m->mdmreg[REG_SI1] = 4;
2973 m->mdmreg[REG_SI2] = 0;
2974 break;
2975 default:
2976 PARSE_ERROR1;
2977 }
2978 break;
2979 default:
2980 PARSE_ERROR1;
2981 }
2982 return 0;
2983 }
2984
2985 static int
isdn_tty_check_ats(int mreg,int mval,modem_info * info,atemu * m)2986 isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
2987 {
2988 /* Some plausibility checks */
2989 switch (mreg) {
2990 case REG_L2PROT:
2991 if (mval > ISDN_PROTO_L2_MAX)
2992 return 1;
2993 break;
2994 case REG_PSIZE:
2995 if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
2996 return 1;
2997 #ifdef CONFIG_ISDN_AUDIO
2998 if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
2999 return 1;
3000 #endif
3001 info->xmit_size = mval * 16;
3002 switch (m->mdmreg[REG_L2PROT]) {
3003 case ISDN_PROTO_L2_V11096:
3004 case ISDN_PROTO_L2_V11019:
3005 case ISDN_PROTO_L2_V11038:
3006 info->xmit_size /= 10;
3007 }
3008 break;
3009 case REG_SI1I:
3010 case REG_PLAN:
3011 case REG_SCREEN:
3012 /* readonly registers */
3013 return 1;
3014 }
3015 return 0;
3016 }
3017
3018 /*
3019 * Perform ATS command
3020 */
3021 static int
isdn_tty_cmd_ATS(char ** p,modem_info * info)3022 isdn_tty_cmd_ATS(char **p, modem_info * info)
3023 {
3024 atemu *m = &info->emu;
3025 int bitpos;
3026 int mreg;
3027 int mval;
3028 int bval;
3029
3030 mreg = isdn_getnum(p);
3031 if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
3032 PARSE_ERROR1;
3033 switch (*p[0]) {
3034 case '=':
3035 p[0]++;
3036 mval = isdn_getnum(p);
3037 if (mval < 0 || mval > 255)
3038 PARSE_ERROR1;
3039 if (isdn_tty_check_ats(mreg, mval, info, m))
3040 PARSE_ERROR1;
3041 m->mdmreg[mreg] = mval;
3042 break;
3043 case '.':
3044 /* Set/Clear a single bit */
3045 p[0]++;
3046 bitpos = isdn_getnum(p);
3047 if ((bitpos < 0) || (bitpos > 7))
3048 PARSE_ERROR1;
3049 switch (*p[0]) {
3050 case '=':
3051 p[0]++;
3052 bval = isdn_getnum(p);
3053 if (bval < 0 || bval > 1)
3054 PARSE_ERROR1;
3055 if (bval)
3056 mval = m->mdmreg[mreg] | (1 << bitpos);
3057 else
3058 mval = m->mdmreg[mreg] & ~(1 << bitpos);
3059 if (isdn_tty_check_ats(mreg, mval, info, m))
3060 PARSE_ERROR1;
3061 m->mdmreg[mreg] = mval;
3062 break;
3063 case '?':
3064 p[0]++;
3065 isdn_tty_at_cout("\r\n", info);
3066 isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
3067 info);
3068 break;
3069 default:
3070 PARSE_ERROR1;
3071 }
3072 break;
3073 case '?':
3074 p[0]++;
3075 isdn_tty_show_profile(mreg, info);
3076 break;
3077 default:
3078 PARSE_ERROR1;
3079 break;
3080 }
3081 return 0;
3082 }
3083
3084 /*
3085 * Perform ATA command
3086 */
3087 static void
isdn_tty_cmd_ATA(modem_info * info)3088 isdn_tty_cmd_ATA(modem_info * info)
3089 {
3090 atemu *m = &info->emu;
3091 isdn_ctrl cmd;
3092 int l2;
3093
3094 if (info->msr & UART_MSR_RI) {
3095 /* Accept incoming call */
3096 info->last_dir = 0;
3097 strcpy(info->last_num, dev->num[info->drv_index]);
3098 m->mdmreg[REG_RINGCNT] = 0;
3099 info->msr &= ~UART_MSR_RI;
3100 l2 = m->mdmreg[REG_L2PROT];
3101 #ifdef CONFIG_ISDN_AUDIO
3102 /* If more than one bit set in reg18, autoselect Layer2 */
3103 if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
3104 if (m->mdmreg[REG_SI1I] == 1) {
3105 if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
3106 l2 = ISDN_PROTO_L2_TRANS;
3107 } else
3108 l2 = ISDN_PROTO_L2_X75I;
3109 }
3110 #endif
3111 cmd.driver = info->isdn_driver;
3112 cmd.command = ISDN_CMD_SETL2;
3113 cmd.arg = info->isdn_channel + (l2 << 8);
3114 info->last_l2 = l2;
3115 isdn_command(&cmd);
3116 cmd.driver = info->isdn_driver;
3117 cmd.command = ISDN_CMD_SETL3;
3118 cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
3119 #ifdef CONFIG_ISDN_TTY_FAX
3120 if (l2 == ISDN_PROTO_L2_FAX) {
3121 cmd.parm.fax = info->fax;
3122 info->fax->direction = ISDN_TTY_FAX_CONN_IN;
3123 }
3124 #endif
3125 isdn_command(&cmd);
3126 cmd.driver = info->isdn_driver;
3127 cmd.arg = info->isdn_channel;
3128 cmd.command = ISDN_CMD_ACCEPTD;
3129 info->dialing = 16;
3130 info->emu.carrierwait = 0;
3131 isdn_command(&cmd);
3132 isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
3133 } else
3134 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3135 }
3136
3137 #ifdef CONFIG_ISDN_AUDIO
3138 /*
3139 * Parse AT+F.. commands
3140 */
3141 static int
isdn_tty_cmd_PLUSF(char ** p,modem_info * info)3142 isdn_tty_cmd_PLUSF(char **p, modem_info * info)
3143 {
3144 atemu *m = &info->emu;
3145 char rs[20];
3146
3147 if (!strncmp(p[0], "CLASS", 5)) {
3148 p[0] += 5;
3149 switch (*p[0]) {
3150 case '?':
3151 p[0]++;
3152 sprintf(rs, "\r\n%d",
3153 (m->mdmreg[REG_SI1] & 1) ? 8 : 0);
3154 #ifdef CONFIG_ISDN_TTY_FAX
3155 if (TTY_IS_FCLASS2(info))
3156 sprintf(rs, "\r\n2");
3157 else if (TTY_IS_FCLASS1(info))
3158 sprintf(rs, "\r\n1");
3159 #endif
3160 isdn_tty_at_cout(rs, info);
3161 break;
3162 case '=':
3163 p[0]++;
3164 switch (*p[0]) {
3165 case '0':
3166 p[0]++;
3167 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3168 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3169 m->mdmreg[REG_SI1] = 4;
3170 info->xmit_size =
3171 m->mdmreg[REG_PSIZE] * 16;
3172 break;
3173 #ifdef CONFIG_ISDN_TTY_FAX
3174 case '1':
3175 p[0]++;
3176 if (!(dev->global_features &
3177 ISDN_FEATURE_L3_FCLASS1))
3178 PARSE_ERROR1;
3179 m->mdmreg[REG_SI1] = 1;
3180 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3181 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
3182 info->xmit_size =
3183 m->mdmreg[REG_PSIZE] * 16;
3184 break;
3185 case '2':
3186 p[0]++;
3187 if (!(dev->global_features &
3188 ISDN_FEATURE_L3_FCLASS2))
3189 PARSE_ERROR1;
3190 m->mdmreg[REG_SI1] = 1;
3191 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
3192 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
3193 info->xmit_size =
3194 m->mdmreg[REG_PSIZE] * 16;
3195 break;
3196 #endif
3197 case '8':
3198 p[0]++;
3199 /* L2 will change on dialout with si=1 */
3200 m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
3201 m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
3202 m->mdmreg[REG_SI1] = 5;
3203 info->xmit_size = VBUF;
3204 break;
3205 case '?':
3206 p[0]++;
3207 strcpy(rs, "\r\n0,");
3208 #ifdef CONFIG_ISDN_TTY_FAX
3209 if (dev->global_features &
3210 ISDN_FEATURE_L3_FCLASS1)
3211 strcat(rs, "1,");
3212 if (dev->global_features &
3213 ISDN_FEATURE_L3_FCLASS2)
3214 strcat(rs, "2,");
3215 #endif
3216 strcat(rs, "8");
3217 isdn_tty_at_cout(rs, info);
3218 break;
3219 default:
3220 PARSE_ERROR1;
3221 }
3222 break;
3223 default:
3224 PARSE_ERROR1;
3225 }
3226 return 0;
3227 }
3228 #ifdef CONFIG_ISDN_TTY_FAX
3229 return (isdn_tty_cmd_PLUSF_FAX(p, info));
3230 #else
3231 PARSE_ERROR1;
3232 #endif
3233 }
3234
3235 /*
3236 * Parse AT+V.. commands
3237 */
3238 static int
isdn_tty_cmd_PLUSV(char ** p,modem_info * info)3239 isdn_tty_cmd_PLUSV(char **p, modem_info * info)
3240 {
3241 atemu *m = &info->emu;
3242 isdn_ctrl cmd;
3243 static char *vcmd[] =
3244 {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
3245 int i;
3246 int par1;
3247 int par2;
3248 char rs[20];
3249
3250 i = 0;
3251 while (vcmd[i]) {
3252 if (!strncmp(vcmd[i], p[0], 2)) {
3253 p[0] += 2;
3254 break;
3255 }
3256 i++;
3257 }
3258 switch (i) {
3259 case 0:
3260 /* AT+VNH - Auto hangup feature */
3261 switch (*p[0]) {
3262 case '?':
3263 p[0]++;
3264 isdn_tty_at_cout("\r\n1", info);
3265 break;
3266 case '=':
3267 p[0]++;
3268 switch (*p[0]) {
3269 case '1':
3270 p[0]++;
3271 break;
3272 case '?':
3273 p[0]++;
3274 isdn_tty_at_cout("\r\n1", info);
3275 break;
3276 default:
3277 PARSE_ERROR1;
3278 }
3279 break;
3280 default:
3281 PARSE_ERROR1;
3282 }
3283 break;
3284 case 1:
3285 /* AT+VIP - Reset all voice parameters */
3286 isdn_tty_modem_reset_vpar(m);
3287 break;
3288 case 2:
3289 /* AT+VLS - Select device, accept incoming call */
3290 switch (*p[0]) {
3291 case '?':
3292 p[0]++;
3293 sprintf(rs, "\r\n%d", m->vpar[0]);
3294 isdn_tty_at_cout(rs, info);
3295 break;
3296 case '=':
3297 p[0]++;
3298 switch (*p[0]) {
3299 case '0':
3300 p[0]++;
3301 m->vpar[0] = 0;
3302 break;
3303 case '2':
3304 p[0]++;
3305 m->vpar[0] = 2;
3306 break;
3307 case '?':
3308 p[0]++;
3309 isdn_tty_at_cout("\r\n0,2", info);
3310 break;
3311 default:
3312 PARSE_ERROR1;
3313 }
3314 break;
3315 default:
3316 PARSE_ERROR1;
3317 }
3318 break;
3319 case 3:
3320 /* AT+VRX - Start recording */
3321 if (!m->vpar[0])
3322 PARSE_ERROR1;
3323 if (info->online != 1) {
3324 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3325 return 1;
3326 }
3327 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3328 if (!info->dtmf_state) {
3329 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3330 PARSE_ERROR1;
3331 }
3332 info->silence_state = isdn_audio_silence_init(info->silence_state);
3333 if (!info->silence_state) {
3334 printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
3335 PARSE_ERROR1;
3336 }
3337 if (m->vpar[3] < 5) {
3338 info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
3339 if (!info->adpcmr) {
3340 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3341 PARSE_ERROR1;
3342 }
3343 }
3344 #ifdef ISDN_DEBUG_AT
3345 printk(KERN_DEBUG "AT: +VRX\n");
3346 #endif
3347 info->vonline |= 1;
3348 isdn_tty_modem_result(RESULT_CONNECT, info);
3349 return 0;
3350 break;
3351 case 4:
3352 /* AT+VSD - Silence detection */
3353 switch (*p[0]) {
3354 case '?':
3355 p[0]++;
3356 sprintf(rs, "\r\n<%d>,<%d>",
3357 m->vpar[1],
3358 m->vpar[2]);
3359 isdn_tty_at_cout(rs, info);
3360 break;
3361 case '=':
3362 p[0]++;
3363 if ((*p[0]>='0') && (*p[0]<='9')) {
3364 par1 = isdn_getnum(p);
3365 if ((par1 < 0) || (par1 > 31))
3366 PARSE_ERROR1;
3367 if (*p[0] != ',')
3368 PARSE_ERROR1;
3369 p[0]++;
3370 par2 = isdn_getnum(p);
3371 if ((par2 < 0) || (par2 > 255))
3372 PARSE_ERROR1;
3373 m->vpar[1] = par1;
3374 m->vpar[2] = par2;
3375 break;
3376 } else
3377 if (*p[0] == '?') {
3378 p[0]++;
3379 isdn_tty_at_cout("\r\n<0-31>,<0-255>",
3380 info);
3381 break;
3382 } else
3383 PARSE_ERROR1;
3384 break;
3385 default:
3386 PARSE_ERROR1;
3387 }
3388 break;
3389 case 5:
3390 /* AT+VSM - Select compression */
3391 switch (*p[0]) {
3392 case '?':
3393 p[0]++;
3394 sprintf(rs, "\r\n<%d>,<%d><8000>",
3395 m->vpar[3],
3396 m->vpar[1]);
3397 isdn_tty_at_cout(rs, info);
3398 break;
3399 case '=':
3400 p[0]++;
3401 switch (*p[0]) {
3402 case '2':
3403 case '3':
3404 case '4':
3405 case '5':
3406 case '6':
3407 par1 = isdn_getnum(p);
3408 if ((par1 < 2) || (par1 > 6))
3409 PARSE_ERROR1;
3410 m->vpar[3] = par1;
3411 break;
3412 case '?':
3413 p[0]++;
3414 isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
3415 info);
3416 isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
3417 info);
3418 isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
3419 info);
3420 isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
3421 info);
3422 isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
3423 info);
3424 break;
3425 default:
3426 PARSE_ERROR1;
3427 }
3428 break;
3429 default:
3430 PARSE_ERROR1;
3431 }
3432 break;
3433 case 6:
3434 /* AT+VTX - Start sending */
3435 if (!m->vpar[0])
3436 PARSE_ERROR1;
3437 if (info->online != 1) {
3438 isdn_tty_modem_result(RESULT_NO_ANSWER, info);
3439 return 1;
3440 }
3441 info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
3442 if (!info->dtmf_state) {
3443 printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
3444 PARSE_ERROR1;
3445 }
3446 if (m->vpar[3] < 5) {
3447 info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
3448 if (!info->adpcms) {
3449 printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
3450 PARSE_ERROR1;
3451 }
3452 }
3453 #ifdef ISDN_DEBUG_AT
3454 printk(KERN_DEBUG "AT: +VTX\n");
3455 #endif
3456 m->lastDLE = 0;
3457 info->vonline |= 2;
3458 isdn_tty_modem_result(RESULT_CONNECT, info);
3459 return 0;
3460 break;
3461 case 7:
3462 /* AT+VDD - DTMF detection */
3463 switch (*p[0]) {
3464 case '?':
3465 p[0]++;
3466 sprintf(rs, "\r\n<%d>,<%d>",
3467 m->vpar[4],
3468 m->vpar[5]);
3469 isdn_tty_at_cout(rs, info);
3470 break;
3471 case '=':
3472 p[0]++;
3473 if ((*p[0]>='0') && (*p[0]<='9')) {
3474 if (info->online != 1)
3475 PARSE_ERROR1;
3476 par1 = isdn_getnum(p);
3477 if ((par1 < 0) || (par1 > 15))
3478 PARSE_ERROR1;
3479 if (*p[0] != ',')
3480 PARSE_ERROR1;
3481 p[0]++;
3482 par2 = isdn_getnum(p);
3483 if ((par2 < 0) || (par2 > 255))
3484 PARSE_ERROR1;
3485 m->vpar[4] = par1;
3486 m->vpar[5] = par2;
3487 cmd.driver = info->isdn_driver;
3488 cmd.command = ISDN_CMD_AUDIO;
3489 cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
3490 cmd.parm.num[0] = par1;
3491 cmd.parm.num[1] = par2;
3492 isdn_command(&cmd);
3493 break;
3494 } else
3495 if (*p[0] == '?') {
3496 p[0]++;
3497 isdn_tty_at_cout("\r\n<0-15>,<0-255>",
3498 info);
3499 break;
3500 } else
3501 PARSE_ERROR1;
3502 break;
3503 default:
3504 PARSE_ERROR1;
3505 }
3506 break;
3507 default:
3508 PARSE_ERROR1;
3509 }
3510 return 0;
3511 }
3512 #endif /* CONFIG_ISDN_AUDIO */
3513
3514 /*
3515 * Parse and perform an AT-command-line.
3516 */
3517 static void
isdn_tty_parse_at(modem_info * info)3518 isdn_tty_parse_at(modem_info * info)
3519 {
3520 atemu *m = &info->emu;
3521 char *p;
3522 char ds[40];
3523
3524 #ifdef ISDN_DEBUG_AT
3525 printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
3526 #endif
3527 for (p = &m->mdmcmd[2]; *p;) {
3528 switch (*p) {
3529 case ' ':
3530 p++;
3531 break;
3532 case 'A':
3533 /* A - Accept incoming call */
3534 p++;
3535 isdn_tty_cmd_ATA(info);
3536 return;
3537 break;
3538 case 'D':
3539 /* D - Dial */
3540 if (info->msr & UART_MSR_DCD)
3541 PARSE_ERROR;
3542 if (info->msr & UART_MSR_RI) {
3543 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3544 return;
3545 }
3546 isdn_tty_getdial(++p, ds, sizeof ds);
3547 p += strlen(p);
3548 if (!strlen(m->msn))
3549 isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
3550 else if (strlen(ds))
3551 isdn_tty_dial(ds, info, m);
3552 else
3553 PARSE_ERROR;
3554 return;
3555 case 'E':
3556 /* E - Turn Echo on/off */
3557 p++;
3558 switch (isdn_getnum(&p)) {
3559 case 0:
3560 m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
3561 break;
3562 case 1:
3563 m->mdmreg[REG_ECHO] |= BIT_ECHO;
3564 break;
3565 default:
3566 PARSE_ERROR;
3567 }
3568 break;
3569 case 'H':
3570 /* H - On/Off-hook */
3571 p++;
3572 switch (*p) {
3573 case '0':
3574 p++;
3575 isdn_tty_on_hook(info);
3576 break;
3577 case '1':
3578 p++;
3579 isdn_tty_off_hook();
3580 break;
3581 default:
3582 isdn_tty_on_hook(info);
3583 break;
3584 }
3585 break;
3586 case 'I':
3587 /* I - Information */
3588 p++;
3589 isdn_tty_at_cout("\r\nLinux ISDN", info);
3590 switch (*p) {
3591 case '0':
3592 case '1':
3593 p++;
3594 break;
3595 case '2':
3596 p++;
3597 isdn_tty_report(info);
3598 break;
3599 case '3':
3600 p++;
3601 sprintf(ds, "\r\n%d", info->emu.charge);
3602 isdn_tty_at_cout(ds, info);
3603 break;
3604 default:;
3605 }
3606 break;
3607 #ifdef DUMMY_HAYES_AT
3608 case 'L':
3609 case 'M':
3610 /* only for be compilant with common scripts */
3611 /* no function */
3612 p++;
3613 isdn_getnum(&p);
3614 break;
3615 #endif
3616 case 'O':
3617 /* O - Go online */
3618 p++;
3619 if (info->msr & UART_MSR_DCD)
3620 /* if B-Channel is up */
3621 isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
3622 else
3623 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3624 return;
3625 case 'Q':
3626 /* Q - Turn Emulator messages on/off */
3627 p++;
3628 switch (isdn_getnum(&p)) {
3629 case 0:
3630 m->mdmreg[REG_RESP] |= BIT_RESP;
3631 break;
3632 case 1:
3633 m->mdmreg[REG_RESP] &= ~BIT_RESP;
3634 break;
3635 default:
3636 PARSE_ERROR;
3637 }
3638 break;
3639 case 'S':
3640 /* S - Set/Get Register */
3641 p++;
3642 if (isdn_tty_cmd_ATS(&p, info))
3643 return;
3644 break;
3645 case 'V':
3646 /* V - Numeric or ASCII Emulator-messages */
3647 p++;
3648 switch (isdn_getnum(&p)) {
3649 case 0:
3650 m->mdmreg[REG_RESP] |= BIT_RESPNUM;
3651 break;
3652 case 1:
3653 m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
3654 break;
3655 default:
3656 PARSE_ERROR;
3657 }
3658 break;
3659 case 'Z':
3660 /* Z - Load Registers from Profile */
3661 p++;
3662 if (info->msr & UART_MSR_DCD) {
3663 info->online = 0;
3664 isdn_tty_on_hook(info);
3665 }
3666 isdn_tty_modem_reset_regs(info, 1);
3667 break;
3668 case '+':
3669 p++;
3670 switch (*p) {
3671 #ifdef CONFIG_ISDN_AUDIO
3672 case 'F':
3673 p++;
3674 if (isdn_tty_cmd_PLUSF(&p, info))
3675 return;
3676 break;
3677 case 'V':
3678 if ((!(m->mdmreg[REG_SI1] & 1)) ||
3679 (m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
3680 PARSE_ERROR;
3681 p++;
3682 if (isdn_tty_cmd_PLUSV(&p, info))
3683 return;
3684 break;
3685 #endif /* CONFIG_ISDN_AUDIO */
3686 case 'S': /* SUSPEND */
3687 p++;
3688 isdn_tty_get_msnstr(ds, &p);
3689 isdn_tty_suspend(ds, info, m);
3690 break;
3691 case 'R': /* RESUME */
3692 p++;
3693 isdn_tty_get_msnstr(ds, &p);
3694 isdn_tty_resume(ds, info, m);
3695 break;
3696 case 'M': /* MESSAGE */
3697 p++;
3698 isdn_tty_send_msg(info, m, p);
3699 break;
3700 default:
3701 PARSE_ERROR;
3702 }
3703 break;
3704 case '&':
3705 p++;
3706 if (isdn_tty_cmd_ATand(&p, info))
3707 return;
3708 break;
3709 default:
3710 PARSE_ERROR;
3711 }
3712 }
3713 #ifdef CONFIG_ISDN_AUDIO
3714 if (!info->vonline)
3715 #endif
3716 isdn_tty_modem_result(RESULT_OK, info);
3717 }
3718
3719 /* Need own toupper() because standard-toupper is not available
3720 * within modules.
3721 */
3722 #define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
3723
3724 /*
3725 * Perform line-editing of AT-commands
3726 *
3727 * Parameters:
3728 * p inputbuffer
3729 * count length of buffer
3730 * channel index to line (minor-device)
3731 */
3732 static int
isdn_tty_edit_at(const char * p,int count,modem_info * info)3733 isdn_tty_edit_at(const char *p, int count, modem_info * info)
3734 {
3735 atemu *m = &info->emu;
3736 int total = 0;
3737 u_char c;
3738 char eb[2];
3739 int cnt;
3740
3741 for (cnt = count; cnt > 0; p++, cnt--) {
3742 c = *p;
3743 total++;
3744 if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
3745 /* Separator (CR or LF) */
3746 m->mdmcmd[m->mdmcmdl] = 0;
3747 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3748 eb[0] = c;
3749 eb[1] = 0;
3750 isdn_tty_at_cout(eb, info);
3751 }
3752 if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
3753 isdn_tty_parse_at(info);
3754 m->mdmcmdl = 0;
3755 continue;
3756 }
3757 if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
3758 /* Backspace-Function */
3759 if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
3760 if (m->mdmcmdl)
3761 m->mdmcmdl--;
3762 if (m->mdmreg[REG_ECHO] & BIT_ECHO)
3763 isdn_tty_at_cout("\b", info);
3764 }
3765 continue;
3766 }
3767 if (cmdchar(c)) {
3768 if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
3769 eb[0] = c;
3770 eb[1] = 0;
3771 isdn_tty_at_cout(eb, info);
3772 }
3773 if (m->mdmcmdl < 255) {
3774 c = my_toupper(c);
3775 switch (m->mdmcmdl) {
3776 case 1:
3777 if (c == 'T') {
3778 m->mdmcmd[m->mdmcmdl] = c;
3779 m->mdmcmd[++m->mdmcmdl] = 0;
3780 break;
3781 } else
3782 m->mdmcmdl = 0;
3783 /* Fall through, check for 'A' */
3784 case 0:
3785 if (c == 'A') {
3786 m->mdmcmd[m->mdmcmdl] = c;
3787 m->mdmcmd[++m->mdmcmdl] = 0;
3788 }
3789 break;
3790 default:
3791 m->mdmcmd[m->mdmcmdl] = c;
3792 m->mdmcmd[++m->mdmcmdl] = 0;
3793 }
3794 }
3795 }
3796 }
3797 return total;
3798 }
3799
3800 /*
3801 * Switch all modem-channels who are online and got a valid
3802 * escape-sequence 1.5 seconds ago, to command-mode.
3803 * This function is called every second via timer-interrupt from within
3804 * timer-dispatcher isdn_timer_function()
3805 */
3806 void
isdn_tty_modem_escape(void)3807 isdn_tty_modem_escape(void)
3808 {
3809 int ton = 0;
3810 int i;
3811 int midx;
3812
3813 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
3814 if (USG_MODEM(dev->usage[i]))
3815 if ((midx = dev->m_idx[i]) >= 0) {
3816 modem_info *info = &dev->mdm.info[midx];
3817 if (info->online) {
3818 ton = 1;
3819 if ((info->emu.pluscount == 3) &&
3820 time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
3821 info->emu.pluscount = 0;
3822 info->online = 0;
3823 isdn_tty_modem_result(RESULT_OK, info);
3824 }
3825 }
3826 }
3827 isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
3828 }
3829
3830 /*
3831 * Put a RING-message to all modem-channels who have the RI-bit set.
3832 * This function is called every second via timer-interrupt from within
3833 * timer-dispatcher isdn_timer_function()
3834 */
3835 void
isdn_tty_modem_ring(void)3836 isdn_tty_modem_ring(void)
3837 {
3838 int ton = 0;
3839 int i;
3840
3841 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3842 modem_info *info = &dev->mdm.info[i];
3843 if (info->msr & UART_MSR_RI) {
3844 ton = 1;
3845 isdn_tty_modem_result(RESULT_RING, info);
3846 }
3847 }
3848 isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
3849 }
3850
3851 /*
3852 * For all online tty's, try sending data to
3853 * the lower levels.
3854 */
3855 void
isdn_tty_modem_xmit(void)3856 isdn_tty_modem_xmit(void)
3857 {
3858 int ton = 1;
3859 int i;
3860
3861 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3862 modem_info *info = &dev->mdm.info[i];
3863 if (info->online) {
3864 ton = 1;
3865 isdn_tty_senddown(info);
3866 isdn_tty_tint(info);
3867 }
3868 }
3869 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
3870 }
3871
3872 /*
3873 * Check all channels if we have a 'no carrier' timeout.
3874 * Timeout value is set by Register S7.
3875 */
3876 void
isdn_tty_carrier_timeout(void)3877 isdn_tty_carrier_timeout(void)
3878 {
3879 int ton = 0;
3880 int i;
3881
3882 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
3883 modem_info *info = &dev->mdm.info[i];
3884 if (info->dialing) {
3885 if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
3886 info->dialing = 0;
3887 isdn_tty_modem_result(RESULT_NO_CARRIER, info);
3888 isdn_tty_modem_hup(info, 1);
3889 }
3890 else
3891 ton = 1;
3892 }
3893 }
3894 isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
3895 }
3896