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[PATCH] fix semaphore handling in __unregister_chrdev_region
[linux/fpc-iii.git] / drivers / isdn / i4l / isdn_common.c
blobc406df6f268a5f630c051bea40c5a45351203de0
1 /* $Id: isdn_common.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
2 *
3 * Linux ISDN subsystem, common used functions (linklevel).
4 *
5 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
6 * Copyright 1995,96 Thinking Objects Software GmbH Wuerzburg
7 * Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
8 *
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
11 *
12 */
13
14 #include <linux/config.h>
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/version.h>
18 #include <linux/poll.h>
19 #include <linux/vmalloc.h>
20 #include <linux/isdn.h>
21 #include <linux/smp_lock.h>
22 #include "isdn_common.h"
23 #include "isdn_tty.h"
24 #include "isdn_net.h"
25 #include "isdn_ppp.h"
26 #ifdef CONFIG_ISDN_AUDIO
27 #include "isdn_audio.h"
28 #endif
29 #ifdef CONFIG_ISDN_DIVERSION_MODULE
30 #define CONFIG_ISDN_DIVERSION
31 #endif
32 #ifdef CONFIG_ISDN_DIVERSION
33 #include <linux/isdn_divertif.h>
34 #endif /* CONFIG_ISDN_DIVERSION */
35 #include "isdn_v110.h"
36
37 /* Debugflags */
38 #undef ISDN_DEBUG_STATCALLB
39
40 MODULE_DESCRIPTION("ISDN4Linux: link layer");
41 MODULE_AUTHOR("Fritz Elfert");
42 MODULE_LICENSE("GPL");
43
44 isdn_dev *dev;
45
46 static char *isdn_revision = "$Revision: 1.1.2.3 $";
47
48 extern char *isdn_net_revision;
49 extern char *isdn_tty_revision;
50 #ifdef CONFIG_ISDN_PPP
51 extern char *isdn_ppp_revision;
52 #else
53 static char *isdn_ppp_revision = ": none $";
54 #endif
55 #ifdef CONFIG_ISDN_AUDIO
56 extern char *isdn_audio_revision;
57 #else
58 static char *isdn_audio_revision = ": none $";
59 #endif
60 extern char *isdn_v110_revision;
61
62 #ifdef CONFIG_ISDN_DIVERSION
63 static isdn_divert_if *divert_if; /* = NULL */
64 #endif /* CONFIG_ISDN_DIVERSION */
65
66
67 static int isdn_writebuf_stub(int, int, const u_char __user *, int);
68 static void set_global_features(void);
69 static int isdn_wildmat(char *s, char *p);
70
71
72 static inline void
73 isdn_lock_driver(isdn_driver_t *drv)
74 {
75 try_module_get(drv->interface->owner);
76 drv->locks++;
77 }
78
79 void
80 isdn_lock_drivers(void)
81 {
82 int i;
83
84 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
85 if (!dev->drv[i])
86 continue;
87 isdn_lock_driver(dev->drv[i]);
88 }
89 }
90
91 static inline void
92 isdn_unlock_driver(isdn_driver_t *drv)
93 {
94 if (drv->locks > 0) {
95 drv->locks--;
96 module_put(drv->interface->owner);
97 }
98 }
99
100 void
101 isdn_unlock_drivers(void)
102 {
103 int i;
104
105 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
106 if (!dev->drv[i])
107 continue;
108 isdn_unlock_driver(dev->drv[i]);
109 }
110 }
111
112 #if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP)
113 void
114 isdn_dumppkt(char *s, u_char * p, int len, int dumplen)
115 {
116 int dumpc;
117
118 printk(KERN_DEBUG "%s(%d) ", s, len);
119 for (dumpc = 0; (dumpc < dumplen) && (len); len--, dumpc++)
120 printk(" %02x", *p++);
121 printk("\n");
122 }
123 #endif
124
125 /*
126 * I picked the pattern-matching-functions from an old GNU-tar version (1.10)
127 * It was originally written and put to PD by rs@mirror.TMC.COM (Rich Salz)
128 */
129 static int
130 isdn_star(char *s, char *p)
131 {
132 while (isdn_wildmat(s, p)) {
133 if (*++s == '\0')
134 return (2);
135 }
136 return (0);
137 }
138
139 /*
140 * Shell-type Pattern-matching for incoming caller-Ids
141 * This function gets a string in s and checks, if it matches the pattern
142 * given in p.
143 *
144 * Return:
145 * 0 = match.
146 * 1 = no match.
147 * 2 = no match. Would eventually match, if s would be longer.
148 *
149 * Possible Patterns:
150 *
151 * '?' matches one character
152 * '*' matches zero or more characters
153 * [xyz] matches the set of characters in brackets.
154 * [^xyz] matches any single character not in the set of characters
155 */
156
157 static int
158 isdn_wildmat(char *s, char *p)
159 {
160 register int last;
161 register int matched;
162 register int reverse;
163 register int nostar = 1;
164
165 if (!(*s) && !(*p))
166 return(1);
167 for (; *p; s++, p++)
168 switch (*p) {
169 case '\\':
170 /*
171 * Literal match with following character,
172 * fall through.
173 */
174 p++;
175 default:
176 if (*s != *p)
177 return (*s == '\0')?2:1;
178 continue;
179 case '?':
180 /* Match anything. */
181 if (*s == '\0')
182 return (2);
183 continue;
184 case '*':
185 nostar = 0;
186 /* Trailing star matches everything. */
187 return (*++p ? isdn_star(s, p) : 0);
188 case '[':
189 /* [^....] means inverse character class. */
190 if ((reverse = (p[1] == '^')))
191 p++;
192 for (last = 0, matched = 0; *++p && (*p != ']'); last = *p)
193 /* This next line requires a good C compiler. */
194 if (*p == '-' ? *s <= *++p && *s >= last : *s == *p)
195 matched = 1;
196 if (matched == reverse)
197 return (1);
198 continue;
199 }
200 return (*s == '\0')?0:nostar;
201 }
202
203 int isdn_msncmp( const char * msn1, const char * msn2 )
204 {
205 char TmpMsn1[ ISDN_MSNLEN ];
206 char TmpMsn2[ ISDN_MSNLEN ];
207 char *p;
208
209 for ( p = TmpMsn1; *msn1 && *msn1 != ':'; ) // Strip off a SPID
210 *p++ = *msn1++;
211 *p = '\0';
212
213 for ( p = TmpMsn2; *msn2 && *msn2 != ':'; ) // Strip off a SPID
214 *p++ = *msn2++;
215 *p = '\0';
216
217 return isdn_wildmat( TmpMsn1, TmpMsn2 );
218 }
219
220 int
221 isdn_dc2minor(int di, int ch)
222 {
223 int i;
224 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
225 if (dev->chanmap[i] == ch && dev->drvmap[i] == di)
226 return i;
227 return -1;
228 }
229
230 static int isdn_timer_cnt1 = 0;
231 static int isdn_timer_cnt2 = 0;
232 static int isdn_timer_cnt3 = 0;
233
234 static void
235 isdn_timer_funct(ulong dummy)
236 {
237 int tf = dev->tflags;
238 if (tf & ISDN_TIMER_FAST) {
239 if (tf & ISDN_TIMER_MODEMREAD)
240 isdn_tty_readmodem();
241 if (tf & ISDN_TIMER_MODEMPLUS)
242 isdn_tty_modem_escape();
243 if (tf & ISDN_TIMER_MODEMXMIT)
244 isdn_tty_modem_xmit();
245 }
246 if (tf & ISDN_TIMER_SLOW) {
247 if (++isdn_timer_cnt1 >= ISDN_TIMER_02SEC) {
248 isdn_timer_cnt1 = 0;
249 if (tf & ISDN_TIMER_NETDIAL)
250 isdn_net_dial();
251 }
252 if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) {
253 isdn_timer_cnt2 = 0;
254 if (tf & ISDN_TIMER_NETHANGUP)
255 isdn_net_autohup();
256 if (++isdn_timer_cnt3 >= ISDN_TIMER_RINGING) {
257 isdn_timer_cnt3 = 0;
258 if (tf & ISDN_TIMER_MODEMRING)
259 isdn_tty_modem_ring();
260 }
261 if (tf & ISDN_TIMER_CARRIER)
262 isdn_tty_carrier_timeout();
263 }
264 }
265 if (tf)
266 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
267 }
268
269 void
270 isdn_timer_ctrl(int tf, int onoff)
271 {
272 unsigned long flags;
273 int old_tflags;
274
275 spin_lock_irqsave(&dev->timerlock, flags);
276 if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) {
277 /* If the slow-timer wasn't activated until now */
278 isdn_timer_cnt1 = 0;
279 isdn_timer_cnt2 = 0;
280 }
281 old_tflags = dev->tflags;
282 if (onoff)
283 dev->tflags |= tf;
284 else
285 dev->tflags &= ~tf;
286 if (dev->tflags && !old_tflags)
287 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
288 spin_unlock_irqrestore(&dev->timerlock, flags);
289 }
290
291 /*
292 * Receive a packet from B-Channel. (Called from low-level-module)
293 */
294 static void
295 isdn_receive_skb_callback(int di, int channel, struct sk_buff *skb)
296 {
297 int i;
298
299 if ((i = isdn_dc2minor(di, channel)) == -1) {
300 dev_kfree_skb(skb);
301 return;
302 }
303 /* Update statistics */
304 dev->ibytes[i] += skb->len;
305
306 /* First, try to deliver data to network-device */
307 if (isdn_net_rcv_skb(i, skb))
308 return;
309
310 /* V.110 handling
311 * makes sense for async streams only, so it is
312 * called after possible net-device delivery.
313 */
314 if (dev->v110[i]) {
315 atomic_inc(&dev->v110use[i]);
316 skb = isdn_v110_decode(dev->v110[i], skb);
317 atomic_dec(&dev->v110use[i]);
318 if (!skb)
319 return;
320 }
321
322 /* No network-device found, deliver to tty or raw-channel */
323 if (skb->len) {
324 if (isdn_tty_rcv_skb(i, di, channel, skb))
325 return;
326 wake_up_interruptible(&dev->drv[di]->rcv_waitq[channel]);
327 } else
328 dev_kfree_skb(skb);
329 }
330
331 /*
332 * Intercept command from Linklevel to Lowlevel.
333 * If layer 2 protocol is V.110 and this is not supported by current
334 * lowlevel-driver, use driver's transparent mode and handle V.110 in
335 * linklevel instead.
336 */
337 int
338 isdn_command(isdn_ctrl *cmd)
339 {
340 if (cmd->driver == -1) {
341 printk(KERN_WARNING "isdn_command command(%x) driver -1\n", cmd->command);
342 return(1);
343 }
344 if (cmd->command == ISDN_CMD_SETL2) {
345 int idx = isdn_dc2minor(cmd->driver, cmd->arg & 255);
346 unsigned long l2prot = (cmd->arg >> 8) & 255;
347 unsigned long features = (dev->drv[cmd->driver]->interface->features
348 >> ISDN_FEATURE_L2_SHIFT) &
349 ISDN_FEATURE_L2_MASK;
350 unsigned long l2_feature = (1 << l2prot);
351
352 switch (l2prot) {
353 case ISDN_PROTO_L2_V11096:
354 case ISDN_PROTO_L2_V11019:
355 case ISDN_PROTO_L2_V11038:
356 /* If V.110 requested, but not supported by
357 * HL-driver, set emulator-flag and change
358 * Layer-2 to transparent
359 */
360 if (!(features & l2_feature)) {
361 dev->v110emu[idx] = l2prot;
362 cmd->arg = (cmd->arg & 255) |
363 (ISDN_PROTO_L2_TRANS << 8);
364 } else
365 dev->v110emu[idx] = 0;
366 }
367 }
368 return dev->drv[cmd->driver]->interface->command(cmd);
369 }
370
371 void
372 isdn_all_eaz(int di, int ch)
373 {
374 isdn_ctrl cmd;
375
376 if (di < 0)
377 return;
378 cmd.driver = di;
379 cmd.arg = ch;
380 cmd.command = ISDN_CMD_SETEAZ;
381 cmd.parm.num[0] = '\0';
382 isdn_command(&cmd);
383 }
384
385 /*
386 * Begin of a CAPI like LL<->HL interface, currently used only for
387 * supplementary service (CAPI 2.0 part III)
388 */
389 #include <linux/isdn/capicmd.h>
390
391 int
392 isdn_capi_rec_hl_msg(capi_msg *cm) {
393
394 int di;
395 int ch;
396
397 di = (cm->adr.Controller & 0x7f) -1;
398 ch = isdn_dc2minor(di, (cm->adr.Controller>>8)& 0x7f);
399 switch(cm->Command) {
400 case CAPI_FACILITY:
401 /* in the moment only handled in tty */
402 return(isdn_tty_capi_facility(cm));
403 default:
404 return(-1);
405 }
406 }
407
408 static int
409 isdn_status_callback(isdn_ctrl * c)
410 {
411 int di;
412 u_long flags;
413 int i;
414 int r;
415 int retval = 0;
416 isdn_ctrl cmd;
417 isdn_net_dev *p;
418
419 di = c->driver;
420 i = isdn_dc2minor(di, c->arg);
421 switch (c->command) {
422 case ISDN_STAT_BSENT:
423 if (i < 0)
424 return -1;
425 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
426 return 0;
427 if (isdn_net_stat_callback(i, c))
428 return 0;
429 if (isdn_v110_stat_callback(i, c))
430 return 0;
431 if (isdn_tty_stat_callback(i, c))
432 return 0;
433 wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
434 break;
435 case ISDN_STAT_STAVAIL:
436 dev->drv[di]->stavail += c->arg;
437 wake_up_interruptible(&dev->drv[di]->st_waitq);
438 break;
439 case ISDN_STAT_RUN:
440 dev->drv[di]->flags |= DRV_FLAG_RUNNING;
441 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
442 if (dev->drvmap[i] == di)
443 isdn_all_eaz(di, dev->chanmap[i]);
444 set_global_features();
445 break;
446 case ISDN_STAT_STOP:
447 dev->drv[di]->flags &= ~DRV_FLAG_RUNNING;
448 break;
449 case ISDN_STAT_ICALL:
450 if (i < 0)
451 return -1;
452 #ifdef ISDN_DEBUG_STATCALLB
453 printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
454 #endif
455 if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
456 cmd.driver = di;
457 cmd.arg = c->arg;
458 cmd.command = ISDN_CMD_HANGUP;
459 isdn_command(&cmd);
460 return 0;
461 }
462 /* Try to find a network-interface which will accept incoming call */
463 r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup));
464 switch (r) {
465 case 0:
466 /* No network-device replies.
467 * Try ttyI's.
468 * These return 0 on no match, 1 on match and
469 * 3 on eventually match, if CID is longer.
470 */
471 if (c->command == ISDN_STAT_ICALL)
472 if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return(retval);
473 #ifdef CONFIG_ISDN_DIVERSION
474 if (divert_if)
475 if ((retval = divert_if->stat_callback(c)))
476 return(retval); /* processed */
477 #endif /* CONFIG_ISDN_DIVERSION */
478 if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) {
479 /* No tty responding */
480 cmd.driver = di;
481 cmd.arg = c->arg;
482 cmd.command = ISDN_CMD_HANGUP;
483 isdn_command(&cmd);
484 retval = 2;
485 }
486 break;
487 case 1:
488 /* Schedule connection-setup */
489 isdn_net_dial();
490 cmd.driver = di;
491 cmd.arg = c->arg;
492 cmd.command = ISDN_CMD_ACCEPTD;
493 for ( p = dev->netdev; p; p = p->next )
494 if ( p->local->isdn_channel == cmd.arg )
495 {
496 strcpy( cmd.parm.setup.eazmsn, p->local->msn );
497 isdn_command(&cmd);
498 retval = 1;
499 break;
500 }
501 break;
502
503 case 2: /* For calling back, first reject incoming call ... */
504 case 3: /* Interface found, but down, reject call actively */
505 retval = 2;
506 printk(KERN_INFO "isdn: Rejecting Call\n");
507 cmd.driver = di;
508 cmd.arg = c->arg;
509 cmd.command = ISDN_CMD_HANGUP;
510 isdn_command(&cmd);
511 if (r == 3)
512 break;
513 /* Fall through */
514 case 4:
515 /* ... then start callback. */
516 isdn_net_dial();
517 break;
518 case 5:
519 /* Number would eventually match, if longer */
520 retval = 3;
521 break;
522 }
523 #ifdef ISDN_DEBUG_STATCALLB
524 printk(KERN_DEBUG "ICALL: ret=%d\n", retval);
525 #endif
526 return retval;
527 break;
528 case ISDN_STAT_CINF:
529 if (i < 0)
530 return -1;
531 #ifdef ISDN_DEBUG_STATCALLB
532 printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
533 #endif
534 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
535 return 0;
536 if (strcmp(c->parm.num, "0"))
537 isdn_net_stat_callback(i, c);
538 isdn_tty_stat_callback(i, c);
539 break;
540 case ISDN_STAT_CAUSE:
541 #ifdef ISDN_DEBUG_STATCALLB
542 printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
543 #endif
544 printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
545 dev->drvid[di], c->arg, c->parm.num);
546 isdn_tty_stat_callback(i, c);
547 #ifdef CONFIG_ISDN_DIVERSION
548 if (divert_if)
549 divert_if->stat_callback(c);
550 #endif /* CONFIG_ISDN_DIVERSION */
551 break;
552 case ISDN_STAT_DISPLAY:
553 #ifdef ISDN_DEBUG_STATCALLB
554 printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display);
555 #endif
556 isdn_tty_stat_callback(i, c);
557 #ifdef CONFIG_ISDN_DIVERSION
558 if (divert_if)
559 divert_if->stat_callback(c);
560 #endif /* CONFIG_ISDN_DIVERSION */
561 break;
562 case ISDN_STAT_DCONN:
563 if (i < 0)
564 return -1;
565 #ifdef ISDN_DEBUG_STATCALLB
566 printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
567 #endif
568 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
569 return 0;
570 /* Find any net-device, waiting for D-channel setup */
571 if (isdn_net_stat_callback(i, c))
572 break;
573 isdn_v110_stat_callback(i, c);
574 /* Find any ttyI, waiting for D-channel setup */
575 if (isdn_tty_stat_callback(i, c)) {
576 cmd.driver = di;
577 cmd.arg = c->arg;
578 cmd.command = ISDN_CMD_ACCEPTB;
579 isdn_command(&cmd);
580 break;
581 }
582 break;
583 case ISDN_STAT_DHUP:
584 if (i < 0)
585 return -1;
586 #ifdef ISDN_DEBUG_STATCALLB
587 printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
588 #endif
589 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
590 return 0;
591 dev->drv[di]->online &= ~(1 << (c->arg));
592 isdn_info_update();
593 /* Signal hangup to network-devices */
594 if (isdn_net_stat_callback(i, c))
595 break;
596 isdn_v110_stat_callback(i, c);
597 if (isdn_tty_stat_callback(i, c))
598 break;
599 #ifdef CONFIG_ISDN_DIVERSION
600 if (divert_if)
601 divert_if->stat_callback(c);
602 #endif /* CONFIG_ISDN_DIVERSION */
603 break;
604 break;
605 case ISDN_STAT_BCONN:
606 if (i < 0)
607 return -1;
608 #ifdef ISDN_DEBUG_STATCALLB
609 printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
610 #endif
611 /* Signal B-channel-connect to network-devices */
612 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
613 return 0;
614 dev->drv[di]->online |= (1 << (c->arg));
615 isdn_info_update();
616 if (isdn_net_stat_callback(i, c))
617 break;
618 isdn_v110_stat_callback(i, c);
619 if (isdn_tty_stat_callback(i, c))
620 break;
621 break;
622 case ISDN_STAT_BHUP:
623 if (i < 0)
624 return -1;
625 #ifdef ISDN_DEBUG_STATCALLB
626 printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
627 #endif
628 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
629 return 0;
630 dev->drv[di]->online &= ~(1 << (c->arg));
631 isdn_info_update();
632 #ifdef CONFIG_ISDN_X25
633 /* Signal hangup to network-devices */
634 if (isdn_net_stat_callback(i, c))
635 break;
636 #endif
637 isdn_v110_stat_callback(i, c);
638 if (isdn_tty_stat_callback(i, c))
639 break;
640 break;
641 case ISDN_STAT_NODCH:
642 if (i < 0)
643 return -1;
644 #ifdef ISDN_DEBUG_STATCALLB
645 printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
646 #endif
647 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
648 return 0;
649 if (isdn_net_stat_callback(i, c))
650 break;
651 if (isdn_tty_stat_callback(i, c))
652 break;
653 break;
654 case ISDN_STAT_ADDCH:
655 spin_lock_irqsave(&dev->lock, flags);
656 if (isdn_add_channels(dev->drv[di], di, c->arg, 1)) {
657 spin_unlock_irqrestore(&dev->lock, flags);
658 return -1;
659 }
660 spin_unlock_irqrestore(&dev->lock, flags);
661 isdn_info_update();
662 break;
663 case ISDN_STAT_DISCH:
664 spin_lock_irqsave(&dev->lock, flags);
665 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
666 if ((dev->drvmap[i] == di) &&
667 (dev->chanmap[i] == c->arg)) {
668 if (c->parm.num[0])
669 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
670 else
671 if (USG_NONE(dev->usage[i])) {
672 dev->usage[i] |= ISDN_USAGE_DISABLED;
673 }
674 else
675 retval = -1;
676 break;
677 }
678 spin_unlock_irqrestore(&dev->lock, flags);
679 isdn_info_update();
680 break;
681 case ISDN_STAT_UNLOAD:
682 while (dev->drv[di]->locks > 0) {
683 isdn_unlock_driver(dev->drv[di]);
684 }
685 spin_lock_irqsave(&dev->lock, flags);
686 isdn_tty_stat_callback(i, c);
687 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
688 if (dev->drvmap[i] == di) {
689 dev->drvmap[i] = -1;
690 dev->chanmap[i] = -1;
691 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
692 }
693 dev->drivers--;
694 dev->channels -= dev->drv[di]->channels;
695 kfree(dev->drv[di]->rcverr);
696 kfree(dev->drv[di]->rcvcount);
697 for (i = 0; i < dev->drv[di]->channels; i++)
698 skb_queue_purge(&dev->drv[di]->rpqueue[i]);
699 kfree(dev->drv[di]->rpqueue);
700 kfree(dev->drv[di]->rcv_waitq);
701 kfree(dev->drv[di]);
702 dev->drv[di] = NULL;
703 dev->drvid[di][0] = '\0';
704 isdn_info_update();
705 set_global_features();
706 spin_unlock_irqrestore(&dev->lock, flags);
707 return 0;
708 case ISDN_STAT_L1ERR:
709 break;
710 case CAPI_PUT_MESSAGE:
711 return(isdn_capi_rec_hl_msg(&c->parm.cmsg));
712 #ifdef CONFIG_ISDN_TTY_FAX
713 case ISDN_STAT_FAXIND:
714 isdn_tty_stat_callback(i, c);
715 break;
716 #endif
717 #ifdef CONFIG_ISDN_AUDIO
718 case ISDN_STAT_AUDIO:
719 isdn_tty_stat_callback(i, c);
720 break;
721 #endif
722 #ifdef CONFIG_ISDN_DIVERSION
723 case ISDN_STAT_PROT:
724 case ISDN_STAT_REDIR:
725 if (divert_if)
726 return(divert_if->stat_callback(c));
727 #endif /* CONFIG_ISDN_DIVERSION */
728 default:
729 return -1;
730 }
731 return 0;
732 }
733
734 /*
735 * Get integer from char-pointer, set pointer to end of number
736 */
737 int
738 isdn_getnum(char **p)
739 {
740 int v = -1;
741
742 while (*p[0] >= '0' && *p[0] <= '9')
743 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
744 return v;
745 }
746
747 #define DLE 0x10
748
749 /*
750 * isdn_readbchan() tries to get data from the read-queue.
751 * It MUST be called with interrupts off.
752 *
753 * Be aware that this is not an atomic operation when sleep != 0, even though
754 * interrupts are turned off! Well, like that we are currently only called
755 * on behalf of a read system call on raw device files (which are documented
756 * to be dangerous and for for debugging purpose only). The inode semaphore
757 * takes care that this is not called for the same minor device number while
758 * we are sleeping, but access is not serialized against simultaneous read()
759 * from the corresponding ttyI device. Can other ugly events, like changes
760 * of the mapping (di,ch)<->minor, happen during the sleep? --he
761 */
762 int
763 isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, wait_queue_head_t *sleep)
764 {
765 int count;
766 int count_pull;
767 int count_put;
768 int dflag;
769 struct sk_buff *skb;
770 u_char *cp;
771
772 if (!dev->drv[di])
773 return 0;
774 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
775 if (sleep)
776 interruptible_sleep_on(sleep);
777 else
778 return 0;
779 }
780 if (len > dev->drv[di]->rcvcount[channel])
781 len = dev->drv[di]->rcvcount[channel];
782 cp = buf;
783 count = 0;
784 while (len) {
785 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
786 break;
787 #ifdef CONFIG_ISDN_AUDIO
788 if (ISDN_AUDIO_SKB_LOCK(skb))
789 break;
790 ISDN_AUDIO_SKB_LOCK(skb) = 1;
791 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
792 char *p = skb->data;
793 unsigned long DLEmask = (1 << channel);
794
795 dflag = 0;
796 count_pull = count_put = 0;
797 while ((count_pull < skb->len) && (len > 0)) {
798 len--;
799 if (dev->drv[di]->DLEflag & DLEmask) {
800 *cp++ = DLE;
801 dev->drv[di]->DLEflag &= ~DLEmask;
802 } else {
803 *cp++ = *p;
804 if (*p == DLE) {
805 dev->drv[di]->DLEflag |= DLEmask;
806 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
807 }
808 p++;
809 count_pull++;
810 }
811 count_put++;
812 }
813 if (count_pull >= skb->len)
814 dflag = 1;
815 } else {
816 #endif
817 /* No DLE's in buff, so simply copy it */
818 dflag = 1;
819 if ((count_pull = skb->len) > len) {
820 count_pull = len;
821 dflag = 0;
822 }
823 count_put = count_pull;
824 memcpy(cp, skb->data, count_put);
825 cp += count_put;
826 len -= count_put;
827 #ifdef CONFIG_ISDN_AUDIO
828 }
829 #endif
830 count += count_put;
831 if (fp) {
832 memset(fp, 0, count_put);
833 fp += count_put;
834 }
835 if (dflag) {
836 /* We got all the data in this buff.
837 * Now we can dequeue it.
838 */
839 if (fp)
840 *(fp - 1) = 0xff;
841 #ifdef CONFIG_ISDN_AUDIO
842 ISDN_AUDIO_SKB_LOCK(skb) = 0;
843 #endif
844 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
845 dev_kfree_skb(skb);
846 } else {
847 /* Not yet emptied this buff, so it
848 * must stay in the queue, for further calls
849 * but we pull off the data we got until now.
850 */
851 skb_pull(skb, count_pull);
852 #ifdef CONFIG_ISDN_AUDIO
853 ISDN_AUDIO_SKB_LOCK(skb) = 0;
854 #endif
855 }
856 dev->drv[di]->rcvcount[channel] -= count_put;
857 }
858 return count;
859 }
860
861 static __inline int
862 isdn_minor2drv(int minor)
863 {
864 return (dev->drvmap[minor]);
865 }
866
867 static __inline int
868 isdn_minor2chan(int minor)
869 {
870 return (dev->chanmap[minor]);
871 }
872
873 static char *
874 isdn_statstr(void)
875 {
876 static char istatbuf[2048];
877 char *p;
878 int i;
879
880 sprintf(istatbuf, "idmap:\t");
881 p = istatbuf + strlen(istatbuf);
882 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
883 sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]);
884 p = istatbuf + strlen(istatbuf);
885 }
886 sprintf(p, "\nchmap:\t");
887 p = istatbuf + strlen(istatbuf);
888 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
889 sprintf(p, "%d ", dev->chanmap[i]);
890 p = istatbuf + strlen(istatbuf);
891 }
892 sprintf(p, "\ndrmap:\t");
893 p = istatbuf + strlen(istatbuf);
894 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
895 sprintf(p, "%d ", dev->drvmap[i]);
896 p = istatbuf + strlen(istatbuf);
897 }
898 sprintf(p, "\nusage:\t");
899 p = istatbuf + strlen(istatbuf);
900 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
901 sprintf(p, "%d ", dev->usage[i]);
902 p = istatbuf + strlen(istatbuf);
903 }
904 sprintf(p, "\nflags:\t");
905 p = istatbuf + strlen(istatbuf);
906 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
907 if (dev->drv[i]) {
908 sprintf(p, "%ld ", dev->drv[i]->online);
909 p = istatbuf + strlen(istatbuf);
910 } else {
911 sprintf(p, "? ");
912 p = istatbuf + strlen(istatbuf);
913 }
914 }
915 sprintf(p, "\nphone:\t");
916 p = istatbuf + strlen(istatbuf);
917 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
918 sprintf(p, "%s ", dev->num[i]);
919 p = istatbuf + strlen(istatbuf);
920 }
921 sprintf(p, "\n");
922 return istatbuf;
923 }
924
925 /* Module interface-code */
926
927 void
928 isdn_info_update(void)
929 {
930 infostruct *p = dev->infochain;
931
932 while (p) {
933 *(p->private) = 1;
934 p = (infostruct *) p->next;
935 }
936 wake_up_interruptible(&(dev->info_waitq));
937 }
938
939 static ssize_t
940 isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
941 {
942 uint minor = MINOR(file->f_dentry->d_inode->i_rdev);
943 int len = 0;
944 int drvidx;
945 int chidx;
946 int retval;
947 char *p;
948
949 lock_kernel();
950 if (minor == ISDN_MINOR_STATUS) {
951 if (!file->private_data) {
952 if (file->f_flags & O_NONBLOCK) {
953 retval = -EAGAIN;
954 goto out;
955 }
956 interruptible_sleep_on(&(dev->info_waitq));
957 }
958 p = isdn_statstr();
959 file->private_data = NULL;
960 if ((len = strlen(p)) <= count) {
961 if (copy_to_user(buf, p, len)) {
962 retval = -EFAULT;
963 goto out;
964 }
965 *off += len;
966 retval = len;
967 goto out;
968 }
969 retval = 0;
970 goto out;
971 }
972 if (!dev->drivers) {
973 retval = -ENODEV;
974 goto out;
975 }
976 if (minor <= ISDN_MINOR_BMAX) {
977 printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor);
978 drvidx = isdn_minor2drv(minor);
979 if (drvidx < 0) {
980 retval = -ENODEV;
981 goto out;
982 }
983 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
984 retval = -ENODEV;
985 goto out;
986 }
987 chidx = isdn_minor2chan(minor);
988 if (!(p = kmalloc(count, GFP_KERNEL))) {
989 retval = -ENOMEM;
990 goto out;
991 }
992 len = isdn_readbchan(drvidx, chidx, p, NULL, count,
993 &dev->drv[drvidx]->rcv_waitq[chidx]);
994 *off += len;
995 if (copy_to_user(buf,p,len))
996 len = -EFAULT;
997 kfree(p);
998 retval = len;
999 goto out;
1000 }
1001 if (minor <= ISDN_MINOR_CTRLMAX) {
1002 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1003 if (drvidx < 0) {
1004 retval = -ENODEV;
1005 goto out;
1006 }
1007 if (!dev->drv[drvidx]->stavail) {
1008 if (file->f_flags & O_NONBLOCK) {
1009 retval = -EAGAIN;
1010 goto out;
1011 }
1012 interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq));
1013 }
1014 if (dev->drv[drvidx]->interface->readstat) {
1015 if (count > dev->drv[drvidx]->stavail)
1016 count = dev->drv[drvidx]->stavail;
1017 len = dev->drv[drvidx]->interface->
1018 readstat(buf, count, drvidx,
1019 isdn_minor2chan(minor));
1020 } else {
1021 len = 0;
1022 }
1023 if (len)
1024 dev->drv[drvidx]->stavail -= len;
1025 else
1026 dev->drv[drvidx]->stavail = 0;
1027 *off += len;
1028 retval = len;
1029 goto out;
1030 }
1031 #ifdef CONFIG_ISDN_PPP
1032 if (minor <= ISDN_MINOR_PPPMAX) {
1033 retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count);
1034 goto out;
1035 }
1036 #endif
1037 retval = -ENODEV;
1038 out:
1039 unlock_kernel();
1040 return retval;
1041 }
1042
1043 static ssize_t
1044 isdn_write(struct file *file, const char __user *buf, size_t count, loff_t * off)
1045 {
1046 uint minor = MINOR(file->f_dentry->d_inode->i_rdev);
1047 int drvidx;
1048 int chidx;
1049 int retval;
1050
1051 if (minor == ISDN_MINOR_STATUS)
1052 return -EPERM;
1053 if (!dev->drivers)
1054 return -ENODEV;
1055
1056 lock_kernel();
1057 if (minor <= ISDN_MINOR_BMAX) {
1058 printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
1059 drvidx = isdn_minor2drv(minor);
1060 if (drvidx < 0) {
1061 retval = -ENODEV;
1062 goto out;
1063 }
1064 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1065 retval = -ENODEV;
1066 goto out;
1067 }
1068 chidx = isdn_minor2chan(minor);
1069 while (isdn_writebuf_stub(drvidx, chidx, buf, count) != count)
1070 interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]);
1071 retval = count;
1072 goto out;
1073 }
1074 if (minor <= ISDN_MINOR_CTRLMAX) {
1075 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1076 if (drvidx < 0) {
1077 retval = -ENODEV;
1078 goto out;
1079 }
1080 /*
1081 * We want to use the isdnctrl device to load the firmware
1082 *
1083 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1084 return -ENODEV;
1085 */
1086 if (dev->drv[drvidx]->interface->writecmd)
1087 retval = dev->drv[drvidx]->interface->
1088 writecmd(buf, count, drvidx, isdn_minor2chan(minor));
1089 else
1090 retval = count;
1091 goto out;
1092 }
1093 #ifdef CONFIG_ISDN_PPP
1094 if (minor <= ISDN_MINOR_PPPMAX) {
1095 retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count);
1096 goto out;
1097 }
1098 #endif
1099 retval = -ENODEV;
1100 out:
1101 unlock_kernel();
1102 return retval;
1103 }
1104
1105 static unsigned int
1106 isdn_poll(struct file *file, poll_table * wait)
1107 {
1108 unsigned int mask = 0;
1109 unsigned int minor = MINOR(file->f_dentry->d_inode->i_rdev);
1110 int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1111
1112 lock_kernel();
1113 if (minor == ISDN_MINOR_STATUS) {
1114 poll_wait(file, &(dev->info_waitq), wait);
1115 /* mask = POLLOUT | POLLWRNORM; */
1116 if (file->private_data) {
1117 mask |= POLLIN | POLLRDNORM;
1118 }
1119 goto out;
1120 }
1121 if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
1122 if (drvidx < 0) {
1123 /* driver deregistered while file open */
1124 mask = POLLHUP;
1125 goto out;
1126 }
1127 poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
1128 mask = POLLOUT | POLLWRNORM;
1129 if (dev->drv[drvidx]->stavail) {
1130 mask |= POLLIN | POLLRDNORM;
1131 }
1132 goto out;
1133 }
1134 #ifdef CONFIG_ISDN_PPP
1135 if (minor <= ISDN_MINOR_PPPMAX) {
1136 mask = isdn_ppp_poll(file, wait);
1137 goto out;
1138 }
1139 #endif
1140 mask = POLLERR;
1141 out:
1142 unlock_kernel();
1143 return mask;
1144 }
1145
1146
1147 static int
1148 isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
1149 {
1150 uint minor = MINOR(inode->i_rdev);
1151 isdn_ctrl c;
1152 int drvidx;
1153 int chidx;
1154 int ret;
1155 int i;
1156 char __user *p;
1157 char *s;
1158 union iocpar {
1159 char name[10];
1160 char bname[22];
1161 isdn_ioctl_struct iocts;
1162 isdn_net_ioctl_phone phone;
1163 isdn_net_ioctl_cfg cfg;
1164 } iocpar;
1165 void __user *argp = (void __user *)arg;
1166
1167 #define name iocpar.name
1168 #define bname iocpar.bname
1169 #define iocts iocpar.iocts
1170 #define phone iocpar.phone
1171 #define cfg iocpar.cfg
1172
1173 if (minor == ISDN_MINOR_STATUS) {
1174 switch (cmd) {
1175 case IIOCGETDVR:
1176 return (TTY_DV +
1177 (NET_DV << 8) +
1178 (INF_DV << 16));
1179 case IIOCGETCPS:
1180 if (arg) {
1181 ulong __user *p = argp;
1182 int i;
1183 if (!access_ok(VERIFY_WRITE, p,
1184 sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
1185 return -EFAULT;
1186 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1187 put_user(dev->ibytes[i], p++);
1188 put_user(dev->obytes[i], p++);
1189 }
1190 return 0;
1191 } else
1192 return -EINVAL;
1193 break;
1194 #ifdef CONFIG_NETDEVICES
1195 case IIOCNETGPN:
1196 /* Get peer phone number of a connected
1197 * isdn network interface */
1198 if (arg) {
1199 if (copy_from_user(&phone, argp, sizeof(phone)))
1200 return -EFAULT;
1201 return isdn_net_getpeer(&phone, argp);
1202 } else
1203 return -EINVAL;
1204 #endif
1205 default:
1206 return -EINVAL;
1207 }
1208 }
1209 if (!dev->drivers)
1210 return -ENODEV;
1211 if (minor <= ISDN_MINOR_BMAX) {
1212 drvidx = isdn_minor2drv(minor);
1213 if (drvidx < 0)
1214 return -ENODEV;
1215 chidx = isdn_minor2chan(minor);
1216 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1217 return -ENODEV;
1218 return 0;
1219 }
1220 if (minor <= ISDN_MINOR_CTRLMAX) {
1221 /*
1222 * isdn net devices manage lots of configuration variables as linked lists.
1223 * Those lists must only be manipulated from user space. Some of the ioctl's
1224 * service routines access user space and are not atomic. Therefor, ioctl's
1225 * manipulating the lists and ioctl's sleeping while accessing the lists
1226 * are serialized by means of a semaphore.
1227 */
1228 switch (cmd) {
1229 case IIOCNETDWRSET:
1230 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1231 return(-EINVAL);
1232 case IIOCNETLCR:
1233 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1234 return -ENODEV;
1235 #ifdef CONFIG_NETDEVICES
1236 case IIOCNETAIF:
1237 /* Add a network-interface */
1238 if (arg) {
1239 if (copy_from_user(name, argp, sizeof(name)))
1240 return -EFAULT;
1241 s = name;
1242 } else {
1243 s = NULL;
1244 }
1245 ret = down_interruptible(&dev->sem);
1246 if( ret ) return ret;
1247 if ((s = isdn_net_new(s, NULL))) {
1248 if (copy_to_user(argp, s, strlen(s) + 1)){
1249 ret = -EFAULT;
1250 } else {
1251 ret = 0;
1252 }
1253 } else
1254 ret = -ENODEV;
1255 up(&dev->sem);
1256 return ret;
1257 case IIOCNETASL:
1258 /* Add a slave to a network-interface */
1259 if (arg) {
1260 if (copy_from_user(bname, argp, sizeof(bname) - 1))
1261 return -EFAULT;
1262 } else
1263 return -EINVAL;
1264 ret = down_interruptible(&dev->sem);
1265 if( ret ) return ret;
1266 if ((s = isdn_net_newslave(bname))) {
1267 if (copy_to_user(argp, s, strlen(s) + 1)){
1268 ret = -EFAULT;
1269 } else {
1270 ret = 0;
1271 }
1272 } else
1273 ret = -ENODEV;
1274 up(&dev->sem);
1275 return ret;
1276 case IIOCNETDIF:
1277 /* Delete a network-interface */
1278 if (arg) {
1279 if (copy_from_user(name, argp, sizeof(name)))
1280 return -EFAULT;
1281 ret = down_interruptible(&dev->sem);
1282 if( ret ) return ret;
1283 ret = isdn_net_rm(name);
1284 up(&dev->sem);
1285 return ret;
1286 } else
1287 return -EINVAL;
1288 case IIOCNETSCF:
1289 /* Set configurable parameters of a network-interface */
1290 if (arg) {
1291 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1292 return -EFAULT;
1293 return isdn_net_setcfg(&cfg);
1294 } else
1295 return -EINVAL;
1296 case IIOCNETGCF:
1297 /* Get configurable parameters of a network-interface */
1298 if (arg) {
1299 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1300 return -EFAULT;
1301 if (!(ret = isdn_net_getcfg(&cfg))) {
1302 if (copy_to_user(argp, &cfg, sizeof(cfg)))
1303 return -EFAULT;
1304 }
1305 return ret;
1306 } else
1307 return -EINVAL;
1308 case IIOCNETANM:
1309 /* Add a phone-number to a network-interface */
1310 if (arg) {
1311 if (copy_from_user(&phone, argp, sizeof(phone)))
1312 return -EFAULT;
1313 ret = down_interruptible(&dev->sem);
1314 if( ret ) return ret;
1315 ret = isdn_net_addphone(&phone);
1316 up(&dev->sem);
1317 return ret;
1318 } else
1319 return -EINVAL;
1320 case IIOCNETGNM:
1321 /* Get list of phone-numbers of a network-interface */
1322 if (arg) {
1323 if (copy_from_user(&phone, argp, sizeof(phone)))
1324 return -EFAULT;
1325 ret = down_interruptible(&dev->sem);
1326 if( ret ) return ret;
1327 ret = isdn_net_getphones(&phone, argp);
1328 up(&dev->sem);
1329 return ret;
1330 } else
1331 return -EINVAL;
1332 case IIOCNETDNM:
1333 /* Delete a phone-number of a network-interface */
1334 if (arg) {
1335 if (copy_from_user(&phone, argp, sizeof(phone)))
1336 return -EFAULT;
1337 ret = down_interruptible(&dev->sem);
1338 if( ret ) return ret;
1339 ret = isdn_net_delphone(&phone);
1340 up(&dev->sem);
1341 return ret;
1342 } else
1343 return -EINVAL;
1344 case IIOCNETDIL:
1345 /* Force dialing of a network-interface */
1346 if (arg) {
1347 if (copy_from_user(name, argp, sizeof(name)))
1348 return -EFAULT;
1349 return isdn_net_force_dial(name);
1350 } else
1351 return -EINVAL;
1352 #ifdef CONFIG_ISDN_PPP
1353 case IIOCNETALN:
1354 if (!arg)
1355 return -EINVAL;
1356 if (copy_from_user(name, argp, sizeof(name)))
1357 return -EFAULT;
1358 return isdn_ppp_dial_slave(name);
1359 case IIOCNETDLN:
1360 if (!arg)
1361 return -EINVAL;
1362 if (copy_from_user(name, argp, sizeof(name)))
1363 return -EFAULT;
1364 return isdn_ppp_hangup_slave(name);
1365 #endif
1366 case IIOCNETHUP:
1367 /* Force hangup of a network-interface */
1368 if (!arg)
1369 return -EINVAL;
1370 if (copy_from_user(name, argp, sizeof(name)))
1371 return -EFAULT;
1372 return isdn_net_force_hangup(name);
1373 break;
1374 #endif /* CONFIG_NETDEVICES */
1375 case IIOCSETVER:
1376 dev->net_verbose = arg;
1377 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1378 return 0;
1379 case IIOCSETGST:
1380 if (arg)
1381 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1382 else
1383 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1384 printk(KERN_INFO "isdn: Global Mode %s\n",
1385 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1386 return 0;
1387 case IIOCSETBRJ:
1388 drvidx = -1;
1389 if (arg) {
1390 int i;
1391 char *p;
1392 if (copy_from_user(&iocts, argp,
1393 sizeof(isdn_ioctl_struct)))
1394 return -EFAULT;
1395 if (strlen(iocts.drvid)) {
1396 if ((p = strchr(iocts.drvid, ',')))
1397 *p = 0;
1398 drvidx = -1;
1399 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1400 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1401 drvidx = i;
1402 break;
1403 }
1404 }
1405 }
1406 if (drvidx == -1)
1407 return -ENODEV;
1408 if (iocts.arg)
1409 dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1410 else
1411 dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1412 return 0;
1413 case IIOCSIGPRF:
1414 dev->profd = current;
1415 return 0;
1416 break;
1417 case IIOCGETPRF:
1418 /* Get all Modem-Profiles */
1419 if (arg) {
1420 char __user *p = argp;
1421 int i;
1422
1423 if (!access_ok(VERIFY_WRITE, argp,
1424 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1425 * ISDN_MAX_CHANNELS))
1426 return -EFAULT;
1427
1428 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1429 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1430 ISDN_MODEM_NUMREG))
1431 return -EFAULT;
1432 p += ISDN_MODEM_NUMREG;
1433 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1434 return -EFAULT;
1435 p += ISDN_MSNLEN;
1436 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1437 return -EFAULT;
1438 p += ISDN_LMSNLEN;
1439 }
1440 return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1441 } else
1442 return -EINVAL;
1443 break;
1444 case IIOCSETPRF:
1445 /* Set all Modem-Profiles */
1446 if (arg) {
1447 char __user *p = argp;
1448 int i;
1449
1450 if (!access_ok(VERIFY_READ, argp,
1451 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1452 * ISDN_MAX_CHANNELS))
1453 return -EFAULT;
1454
1455 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1456 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1457 ISDN_MODEM_NUMREG))
1458 return -EFAULT;
1459 p += ISDN_MODEM_NUMREG;
1460 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1461 return -EFAULT;
1462 p += ISDN_LMSNLEN;
1463 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1464 return -EFAULT;
1465 p += ISDN_MSNLEN;
1466 }
1467 return 0;
1468 } else
1469 return -EINVAL;
1470 break;
1471 case IIOCSETMAP:
1472 case IIOCGETMAP:
1473 /* Set/Get MSN->EAZ-Mapping for a driver */
1474 if (arg) {
1475
1476 if (copy_from_user(&iocts, argp,
1477 sizeof(isdn_ioctl_struct)))
1478 return -EFAULT;
1479 if (strlen(iocts.drvid)) {
1480 drvidx = -1;
1481 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1482 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1483 drvidx = i;
1484 break;
1485 }
1486 } else
1487 drvidx = 0;
1488 if (drvidx == -1)
1489 return -ENODEV;
1490 if (cmd == IIOCSETMAP) {
1491 int loop = 1;
1492
1493 p = (char __user *) iocts.arg;
1494 i = 0;
1495 while (loop) {
1496 int j = 0;
1497
1498 while (1) {
1499 if (!access_ok(VERIFY_READ, p, 1))
1500 return -EFAULT;
1501 get_user(bname[j], p++);
1502 switch (bname[j]) {
1503 case '\0':
1504 loop = 0;
1505 /* Fall through */
1506 case ',':
1507 bname[j] = '\0';
1508 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1509 j = ISDN_MSNLEN;
1510 break;
1511 default:
1512 j++;
1513 }
1514 if (j >= ISDN_MSNLEN)
1515 break;
1516 }
1517 if (++i > 9)
1518 break;
1519 }
1520 } else {
1521 p = (char __user *) iocts.arg;
1522 for (i = 0; i < 10; i++) {
1523 sprintf(bname, "%s%s",
1524 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1525 dev->drv[drvidx]->msn2eaz[i] : "_",
1526 (i < 9) ? "," : "\0");
1527 if (copy_to_user(p, bname, strlen(bname) + 1))
1528 return -EFAULT;
1529 p += strlen(bname);
1530 }
1531 }
1532 return 0;
1533 } else
1534 return -EINVAL;
1535 case IIOCDBGVAR:
1536 if (arg) {
1537 if (copy_to_user(argp, &dev, sizeof(ulong)))
1538 return -EFAULT;
1539 return 0;
1540 } else
1541 return -EINVAL;
1542 break;
1543 default:
1544 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1545 cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1546 else
1547 return -EINVAL;
1548 if (arg) {
1549 int i;
1550 char *p;
1551 if (copy_from_user(&iocts, argp, sizeof(isdn_ioctl_struct)))
1552 return -EFAULT;
1553 if (strlen(iocts.drvid)) {
1554 if ((p = strchr(iocts.drvid, ',')))
1555 *p = 0;
1556 drvidx = -1;
1557 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1558 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1559 drvidx = i;
1560 break;
1561 }
1562 } else
1563 drvidx = 0;
1564 if (drvidx == -1)
1565 return -ENODEV;
1566 if (!access_ok(VERIFY_WRITE, argp,
1567 sizeof(isdn_ioctl_struct)))
1568 return -EFAULT;
1569 c.driver = drvidx;
1570 c.command = ISDN_CMD_IOCTL;
1571 c.arg = cmd;
1572 memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
1573 ret = isdn_command(&c);
1574 memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
1575 if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
1576 return -EFAULT;
1577 return ret;
1578 } else
1579 return -EINVAL;
1580 }
1581 }
1582 #ifdef CONFIG_ISDN_PPP
1583 if (minor <= ISDN_MINOR_PPPMAX)
1584 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1585 #endif
1586 return -ENODEV;
1587
1588 #undef name
1589 #undef bname
1590 #undef iocts
1591 #undef phone
1592 #undef cfg
1593 }
1594
1595 /*
1596 * Open the device code.
1597 */
1598 static int
1599 isdn_open(struct inode *ino, struct file *filep)
1600 {
1601 uint minor = MINOR(ino->i_rdev);
1602 int drvidx;
1603 int chidx;
1604 int retval = -ENODEV;
1605
1606
1607 if (minor == ISDN_MINOR_STATUS) {
1608 infostruct *p;
1609
1610 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1611 p->next = (char *) dev->infochain;
1612 p->private = (char *) &(filep->private_data);
1613 dev->infochain = p;
1614 /* At opening we allow a single update */
1615 filep->private_data = (char *) 1;
1616 retval = 0;
1617 goto out;
1618 } else {
1619 retval = -ENOMEM;
1620 goto out;
1621 }
1622 }
1623 if (!dev->channels)
1624 goto out;
1625 if (minor <= ISDN_MINOR_BMAX) {
1626 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1627 drvidx = isdn_minor2drv(minor);
1628 if (drvidx < 0)
1629 goto out;
1630 chidx = isdn_minor2chan(minor);
1631 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1632 goto out;
1633 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1634 goto out;
1635 isdn_lock_drivers();
1636 retval = 0;
1637 goto out;
1638 }
1639 if (minor <= ISDN_MINOR_CTRLMAX) {
1640 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1641 if (drvidx < 0)
1642 goto out;
1643 isdn_lock_drivers();
1644 retval = 0;
1645 goto out;
1646 }
1647 #ifdef CONFIG_ISDN_PPP
1648 if (minor <= ISDN_MINOR_PPPMAX) {
1649 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1650 if (retval == 0)
1651 isdn_lock_drivers();
1652 goto out;
1653 }
1654 #endif
1655 out:
1656 nonseekable_open(ino, filep);
1657 return retval;
1658 }
1659
1660 static int
1661 isdn_close(struct inode *ino, struct file *filep)
1662 {
1663 uint minor = MINOR(ino->i_rdev);
1664
1665 lock_kernel();
1666 if (minor == ISDN_MINOR_STATUS) {
1667 infostruct *p = dev->infochain;
1668 infostruct *q = NULL;
1669
1670 while (p) {
1671 if (p->private == (char *) &(filep->private_data)) {
1672 if (q)
1673 q->next = p->next;
1674 else
1675 dev->infochain = (infostruct *) (p->next);
1676 kfree(p);
1677 goto out;
1678 }
1679 q = p;
1680 p = (infostruct *) (p->next);
1681 }
1682 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1683 goto out;
1684 }
1685 isdn_unlock_drivers();
1686 if (minor <= ISDN_MINOR_BMAX)
1687 goto out;
1688 if (minor <= ISDN_MINOR_CTRLMAX) {
1689 if (dev->profd == current)
1690 dev->profd = NULL;
1691 goto out;
1692 }
1693 #ifdef CONFIG_ISDN_PPP
1694 if (minor <= ISDN_MINOR_PPPMAX)
1695 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1696 #endif
1697
1698 out:
1699 unlock_kernel();
1700 return 0;
1701 }
1702
1703 static struct file_operations isdn_fops =
1704 {
1705 .owner = THIS_MODULE,
1706 .llseek = no_llseek,
1707 .read = isdn_read,
1708 .write = isdn_write,
1709 .poll = isdn_poll,
1710 .ioctl = isdn_ioctl,
1711 .open = isdn_open,
1712 .release = isdn_close,
1713 };
1714
1715 char *
1716 isdn_map_eaz2msn(char *msn, int di)
1717 {
1718 isdn_driver_t *this = dev->drv[di];
1719 int i;
1720
1721 if (strlen(msn) == 1) {
1722 i = msn[0] - '0';
1723 if ((i >= 0) && (i <= 9))
1724 if (strlen(this->msn2eaz[i]))
1725 return (this->msn2eaz[i]);
1726 }
1727 return (msn);
1728 }
1729
1730 /*
1731 * Find an unused ISDN-channel, whose feature-flags match the
1732 * given L2- and L3-protocols.
1733 */
1734 #define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1735
1736 /*
1737 * This function must be called with holding the dev->lock.
1738 */
1739 int
1740 isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1741 ,int pre_chan, char *msn)
1742 {
1743 int i;
1744 ulong features;
1745 ulong vfeatures;
1746
1747 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1748 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1749 ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1750 /* If Layer-2 protocol is V.110, accept drivers with
1751 * transparent feature even if these don't support V.110
1752 * because we can emulate this in linklevel.
1753 */
1754 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1755 if (USG_NONE(dev->usage[i]) &&
1756 (dev->drvmap[i] != -1)) {
1757 int d = dev->drvmap[i];
1758 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1759 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1760 continue;
1761 if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1762 continue;
1763 if (dev->usage[i] & ISDN_USAGE_DISABLED)
1764 continue; /* usage not allowed */
1765 if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1766 if (((dev->drv[d]->interface->features & features) == features) ||
1767 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1768 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1769 if ((pre_dev < 0) || (pre_chan < 0)) {
1770 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1771 dev->usage[i] |= usage;
1772 isdn_info_update();
1773 return i;
1774 } else {
1775 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1776 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1777 dev->usage[i] |= usage;
1778 isdn_info_update();
1779 return i;
1780 }
1781 }
1782 }
1783 }
1784 }
1785 return -1;
1786 }
1787
1788 /*
1789 * Set state of ISDN-channel to 'unused'
1790 */
1791 void
1792 isdn_free_channel(int di, int ch, int usage)
1793 {
1794 int i;
1795
1796 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1797 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1798 (dev->drvmap[i] == di) &&
1799 (dev->chanmap[i] == ch)) {
1800 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1801 strcpy(dev->num[i], "???");
1802 dev->ibytes[i] = 0;
1803 dev->obytes[i] = 0;
1804 // 20.10.99 JIM, try to reinitialize v110 !
1805 dev->v110emu[i] = 0;
1806 atomic_set(&(dev->v110use[i]), 0);
1807 isdn_v110_close(dev->v110[i]);
1808 dev->v110[i] = NULL;
1809 // 20.10.99 JIM, try to reinitialize v110 !
1810 isdn_info_update();
1811 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1812 }
1813 }
1814
1815 /*
1816 * Cancel Exclusive-Flag for ISDN-channel
1817 */
1818 void
1819 isdn_unexclusive_channel(int di, int ch)
1820 {
1821 int i;
1822
1823 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1824 if ((dev->drvmap[i] == di) &&
1825 (dev->chanmap[i] == ch)) {
1826 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1827 isdn_info_update();
1828 return;
1829 }
1830 }
1831
1832 /*
1833 * writebuf replacement for SKB_ABLE drivers
1834 */
1835 static int
1836 isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len)
1837 {
1838 int ret;
1839 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1840 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1841
1842 if (!skb)
1843 return 0;
1844 skb_reserve(skb, hl);
1845 copy_from_user(skb_put(skb, len), buf, len);
1846 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
1847 if (ret <= 0)
1848 dev_kfree_skb(skb);
1849 if (ret > 0)
1850 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
1851 return ret;
1852 }
1853
1854 /*
1855 * Return: length of data on success, -ERRcode on failure.
1856 */
1857 int
1858 isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
1859 {
1860 int ret;
1861 struct sk_buff *nskb = NULL;
1862 int v110_ret = skb->len;
1863 int idx = isdn_dc2minor(drvidx, chan);
1864
1865 if (dev->v110[idx]) {
1866 atomic_inc(&dev->v110use[idx]);
1867 nskb = isdn_v110_encode(dev->v110[idx], skb);
1868 atomic_dec(&dev->v110use[idx]);
1869 if (!nskb)
1870 return 0;
1871 v110_ret = *((int *)nskb->data);
1872 skb_pull(nskb, sizeof(int));
1873 if (!nskb->len) {
1874 dev_kfree_skb(nskb);
1875 return v110_ret;
1876 }
1877 /* V.110 must always be acknowledged */
1878 ack = 1;
1879 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
1880 } else {
1881 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1882
1883 if( skb_headroom(skb) < hl ){
1884 /*
1885 * This should only occur when new HL driver with
1886 * increased hl_hdrlen was loaded after netdevice
1887 * was created and connected to the new driver.
1888 *
1889 * The V.110 branch (re-allocates on its own) does
1890 * not need this
1891 */
1892 struct sk_buff * skb_tmp;
1893
1894 skb_tmp = skb_realloc_headroom(skb, hl);
1895 printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
1896 if (!skb_tmp) return -ENOMEM; /* 0 better? */
1897 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
1898 if( ret > 0 ){
1899 dev_kfree_skb(skb);
1900 } else {
1901 dev_kfree_skb(skb_tmp);
1902 }
1903 } else {
1904 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
1905 }
1906 }
1907 if (ret > 0) {
1908 dev->obytes[idx] += ret;
1909 if (dev->v110[idx]) {
1910 atomic_inc(&dev->v110use[idx]);
1911 dev->v110[idx]->skbuser++;
1912 atomic_dec(&dev->v110use[idx]);
1913 /* For V.110 return unencoded data length */
1914 ret = v110_ret;
1915 /* if the complete frame was send we free the skb;
1916 if not upper function will requeue the skb */
1917 if (ret == skb->len)
1918 dev_kfree_skb(skb);
1919 }
1920 } else
1921 if (dev->v110[idx])
1922 dev_kfree_skb(nskb);
1923 return ret;
1924 }
1925
1926 int
1927 isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
1928 {
1929 int j, k, m;
1930
1931 init_waitqueue_head(&d->st_waitq);
1932 if (d->flags & DRV_FLAG_RUNNING)
1933 return -1;
1934 if (n < 1) return 0;
1935
1936 m = (adding) ? d->channels + n : n;
1937
1938 if (dev->channels + n > ISDN_MAX_CHANNELS) {
1939 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
1940 ISDN_MAX_CHANNELS);
1941 return -1;
1942 }
1943
1944 if ((adding) && (d->rcverr))
1945 kfree(d->rcverr);
1946 if (!(d->rcverr = kmalloc(sizeof(int) * m, GFP_ATOMIC))) {
1947 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
1948 return -1;
1949 }
1950 memset((char *) d->rcverr, 0, sizeof(int) * m);
1951
1952 if ((adding) && (d->rcvcount))
1953 kfree(d->rcvcount);
1954 if (!(d->rcvcount = kmalloc(sizeof(int) * m, GFP_ATOMIC))) {
1955 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
1956 if (!adding) kfree(d->rcverr);
1957 return -1;
1958 }
1959 memset((char *) d->rcvcount, 0, sizeof(int) * m);
1960
1961 if ((adding) && (d->rpqueue)) {
1962 for (j = 0; j < d->channels; j++)
1963 skb_queue_purge(&d->rpqueue[j]);
1964 kfree(d->rpqueue);
1965 }
1966 if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_ATOMIC))) {
1967 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
1968 if (!adding) {
1969 kfree(d->rcvcount);
1970 kfree(d->rcverr);
1971 }
1972 return -1;
1973 }
1974 for (j = 0; j < m; j++) {
1975 skb_queue_head_init(&d->rpqueue[j]);
1976 }
1977
1978 if ((adding) && (d->rcv_waitq))
1979 kfree(d->rcv_waitq);
1980 d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_ATOMIC);
1981 if (!d->rcv_waitq) {
1982 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
1983 if (!adding) {
1984 kfree(d->rpqueue);
1985 kfree(d->rcvcount);
1986 kfree(d->rcverr);
1987 }
1988 return -1;
1989 }
1990 d->snd_waitq = d->rcv_waitq + m;
1991 for (j = 0; j < m; j++) {
1992 init_waitqueue_head(&d->rcv_waitq[j]);
1993 init_waitqueue_head(&d->snd_waitq[j]);
1994 }
1995
1996 dev->channels += n;
1997 for (j = d->channels; j < m; j++)
1998 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
1999 if (dev->chanmap[k] < 0) {
2000 dev->chanmap[k] = j;
2001 dev->drvmap[k] = drvidx;
2002 break;
2003 }
2004 d->channels = m;
2005 return 0;
2006 }
2007
2008 /*
2009 * Low-level-driver registration
2010 */
2011
2012 static void
2013 set_global_features(void)
2014 {
2015 int drvidx;
2016
2017 dev->global_features = 0;
2018 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
2019 if (!dev->drv[drvidx])
2020 continue;
2021 if (dev->drv[drvidx]->interface)
2022 dev->global_features |= dev->drv[drvidx]->interface->features;
2023 }
2024 }
2025
2026 #ifdef CONFIG_ISDN_DIVERSION
2027
2028 static char *map_drvname(int di)
2029 {
2030 if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
2031 return(NULL);
2032 return(dev->drvid[di]); /* driver name */
2033 } /* map_drvname */
2034
2035 static int map_namedrv(char *id)
2036 { int i;
2037
2038 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2039 { if (!strcmp(dev->drvid[i],id))
2040 return(i);
2041 }
2042 return(-1);
2043 } /* map_namedrv */
2044
2045 int DIVERT_REG_NAME(isdn_divert_if *i_div)
2046 {
2047 if (i_div->if_magic != DIVERT_IF_MAGIC)
2048 return(DIVERT_VER_ERR);
2049 switch (i_div->cmd)
2050 {
2051 case DIVERT_CMD_REL:
2052 if (divert_if != i_div)
2053 return(DIVERT_REL_ERR);
2054 divert_if = NULL; /* free interface */
2055 return(DIVERT_NO_ERR);
2056
2057 case DIVERT_CMD_REG:
2058 if (divert_if)
2059 return(DIVERT_REG_ERR);
2060 i_div->ll_cmd = isdn_command; /* set command function */
2061 i_div->drv_to_name = map_drvname;
2062 i_div->name_to_drv = map_namedrv;
2063 divert_if = i_div; /* remember interface */
2064 return(DIVERT_NO_ERR);
2065
2066 default:
2067 return(DIVERT_CMD_ERR);
2068 }
2069 } /* DIVERT_REG_NAME */
2070
2071 EXPORT_SYMBOL(DIVERT_REG_NAME);
2072
2073 #endif /* CONFIG_ISDN_DIVERSION */
2074
2075
2076 EXPORT_SYMBOL(register_isdn);
2077 #ifdef CONFIG_ISDN_PPP
2078 EXPORT_SYMBOL(isdn_ppp_register_compressor);
2079 EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2080 #endif
2081
2082 int
2083 register_isdn(isdn_if * i)
2084 {
2085 isdn_driver_t *d;
2086 int j;
2087 ulong flags;
2088 int drvidx;
2089
2090 if (dev->drivers >= ISDN_MAX_DRIVERS) {
2091 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2092 ISDN_MAX_DRIVERS);
2093 return 0;
2094 }
2095 if (!i->writebuf_skb) {
2096 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2097 return 0;
2098 }
2099 if (!(d = kmalloc(sizeof(isdn_driver_t), GFP_KERNEL))) {
2100 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2101 return 0;
2102 }
2103 memset((char *) d, 0, sizeof(isdn_driver_t));
2104
2105 d->maxbufsize = i->maxbufsize;
2106 d->pktcount = 0;
2107 d->stavail = 0;
2108 d->flags = DRV_FLAG_LOADED;
2109 d->online = 0;
2110 d->interface = i;
2111 d->channels = 0;
2112 spin_lock_irqsave(&dev->lock, flags);
2113 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2114 if (!dev->drv[drvidx])
2115 break;
2116 if (isdn_add_channels(d, drvidx, i->channels, 0)) {
2117 spin_unlock_irqrestore(&dev->lock, flags);
2118 kfree(d);
2119 return 0;
2120 }
2121 i->channels = drvidx;
2122 i->rcvcallb_skb = isdn_receive_skb_callback;
2123 i->statcallb = isdn_status_callback;
2124 if (!strlen(i->id))
2125 sprintf(i->id, "line%d", drvidx);
2126 for (j = 0; j < drvidx; j++)
2127 if (!strcmp(i->id, dev->drvid[j]))
2128 sprintf(i->id, "line%d", drvidx);
2129 dev->drv[drvidx] = d;
2130 strcpy(dev->drvid[drvidx], i->id);
2131 isdn_info_update();
2132 dev->drivers++;
2133 set_global_features();
2134 spin_unlock_irqrestore(&dev->lock, flags);
2135 return 1;
2136 }
2137
2138 /*
2139 *****************************************************************************
2140 * And now the modules code.
2141 *****************************************************************************
2142 */
2143
2144 static char *
2145 isdn_getrev(const char *revision)
2146 {
2147 char *rev;
2148 char *p;
2149
2150 if ((p = strchr(revision, ':'))) {
2151 rev = p + 2;
2152 p = strchr(rev, '$');
2153 *--p = 0;
2154 } else
2155 rev = "???";
2156 return rev;
2157 }
2158
2159 /*
2160 * Allocate and initialize all data, register modem-devices
2161 */
2162 static int __init isdn_init(void)
2163 {
2164 int i;
2165 char tmprev[50];
2166
2167 if (!(dev = (isdn_dev *) vmalloc(sizeof(isdn_dev)))) {
2168 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2169 return -EIO;
2170 }
2171 memset((char *) dev, 0, sizeof(isdn_dev));
2172 init_timer(&dev->timer);
2173 dev->timer.function = isdn_timer_funct;
2174 spin_lock_init(&dev->lock);
2175 spin_lock_init(&dev->timerlock);
2176 #ifdef MODULE
2177 dev->owner = THIS_MODULE;
2178 #endif
2179 init_MUTEX(&dev->sem);
2180 init_waitqueue_head(&dev->info_waitq);
2181 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2182 dev->drvmap[i] = -1;
2183 dev->chanmap[i] = -1;
2184 dev->m_idx[i] = -1;
2185 strcpy(dev->num[i], "???");
2186 init_waitqueue_head(&dev->mdm.info[i].open_wait);
2187 init_waitqueue_head(&dev->mdm.info[i].close_wait);
2188 }
2189 if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2190 printk(KERN_WARNING "isdn: Could not register control devices\n");
2191 vfree(dev);
2192 return -EIO;
2193 }
2194 if ((isdn_tty_modem_init()) < 0) {
2195 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2196 vfree(dev);
2197 unregister_chrdev(ISDN_MAJOR, "isdn");
2198 return -EIO;
2199 }
2200 #ifdef CONFIG_ISDN_PPP
2201 if (isdn_ppp_init() < 0) {
2202 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2203 isdn_tty_exit();
2204 unregister_chrdev(ISDN_MAJOR, "isdn");
2205 vfree(dev);
2206 return -EIO;
2207 }
2208 #endif /* CONFIG_ISDN_PPP */
2209
2210 strcpy(tmprev, isdn_revision);
2211 printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2212 strcpy(tmprev, isdn_tty_revision);
2213 printk("%s/", isdn_getrev(tmprev));
2214 strcpy(tmprev, isdn_net_revision);
2215 printk("%s/", isdn_getrev(tmprev));
2216 strcpy(tmprev, isdn_ppp_revision);
2217 printk("%s/", isdn_getrev(tmprev));
2218 strcpy(tmprev, isdn_audio_revision);
2219 printk("%s/", isdn_getrev(tmprev));
2220 strcpy(tmprev, isdn_v110_revision);
2221 printk("%s", isdn_getrev(tmprev));
2222
2223 #ifdef MODULE
2224 printk(" loaded\n");
2225 #else
2226 printk("\n");
2227 #endif
2228 isdn_info_update();
2229 return 0;
2230 }
2231
2232 /*
2233 * Unload module
2234 */
2235 static void __exit isdn_exit(void)
2236 {
2237 #ifdef CONFIG_ISDN_PPP
2238 isdn_ppp_cleanup();
2239 #endif
2240 if (isdn_net_rmall() < 0) {
2241 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2242 return;
2243 }
2244 isdn_tty_exit();
2245 unregister_chrdev(ISDN_MAJOR, "isdn");
2246 del_timer(&dev->timer);
2247 /* call vfree with interrupts enabled, else it will hang */
2248 vfree(dev);
2249 printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2250 }
2251
2252 module_init(isdn_init);
2253 module_exit(isdn_exit);
Linux with added FPC-III support