projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason
[linux-2.6-block.git] / drivers / isdn / i4l / isdn_common.c
CommitLineData
1da177e4
LT		 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>
1da177e4
LT		 17#include <linux/poll.h>
18#include <linux/vmalloc.h>
19#include <linux/isdn.h>
20#include <linux/smp_lock.h>
21#include "isdn_common.h"
22#include "isdn_tty.h"
23#include "isdn_net.h"
24#include "isdn_ppp.h"
25#ifdef CONFIG_ISDN_AUDIO
26#include "isdn_audio.h"
27#endif
28#ifdef CONFIG_ISDN_DIVERSION_MODULE
29#define CONFIG_ISDN_DIVERSION
30#endif
31#ifdef CONFIG_ISDN_DIVERSION
32#include <linux/isdn_divertif.h>
33#endif /* CONFIG_ISDN_DIVERSION */
34#include "isdn_v110.h"
35
36/* Debugflags */
37#undef ISDN_DEBUG_STATCALLB
38
39MODULE_DESCRIPTION("ISDN4Linux: link layer");
40MODULE_AUTHOR("Fritz Elfert");
41MODULE_LICENSE("GPL");
42
43isdn_dev *dev;
44
45static char *isdn_revision = "$Revision: 1.1.2.3 $";
46
47extern char *isdn_net_revision;
48extern char *isdn_tty_revision;
49#ifdef CONFIG_ISDN_PPP
50extern char *isdn_ppp_revision;
51#else
52static char *isdn_ppp_revision = ": none $";
53#endif
54#ifdef CONFIG_ISDN_AUDIO
55extern char *isdn_audio_revision;
56#else
57static char *isdn_audio_revision = ": none $";
58#endif
59extern char *isdn_v110_revision;
60
61#ifdef CONFIG_ISDN_DIVERSION
62static isdn_divert_if *divert_if; /* = NULL */
63#endif /* CONFIG_ISDN_DIVERSION */
64
65
66static int isdn_writebuf_stub(int, int, const u_char __user *, int);
67static void set_global_features(void);
68static int isdn_wildmat(char *s, char *p);
3e206b0a 69static int isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding);
1da177e4
LT		 70
71static inline void
72isdn_lock_driver(isdn_driver_t *drv)
73{
74 try_module_get(drv->interface->owner);
75 drv->locks++;
76}
77
78void
79isdn_lock_drivers(void)
80{
81 int i;
82
83 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
84 if (!dev->drv[i])
85 continue;
86 isdn_lock_driver(dev->drv[i]);
87 }
88}
89
90static inline void
91isdn_unlock_driver(isdn_driver_t *drv)
92{
93 if (drv->locks > 0) {
94 drv->locks--;
95 module_put(drv->interface->owner);
96 }
97}
98
99void
100isdn_unlock_drivers(void)
101{
102 int i;
103
104 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
105 if (!dev->drv[i])
106 continue;
107 isdn_unlock_driver(dev->drv[i]);
108 }
109}
110
111#if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP)
112void
113isdn_dumppkt(char *s, u_char * p, int len, int dumplen)
114{
115 int dumpc;
116
117 printk(KERN_DEBUG "%s(%d) ", s, len);
118 for (dumpc = 0; (dumpc < dumplen) && (len); len--, dumpc++)
119 printk(" %02x", *p++);
120 printk("\n");
121}
122#endif
123
124/*
125 * I picked the pattern-matching-functions from an old GNU-tar version (1.10)
126 * It was originally written and put to PD by rs@mirror.TMC.COM (Rich Salz)
127 */
128static int
129isdn_star(char *s, char *p)
130{
131 while (isdn_wildmat(s, p)) {
132 if (*++s == '\0')
133 return (2);
134 }
135 return (0);
136}
137
138/*
139 * Shell-type Pattern-matching for incoming caller-Ids
140 * This function gets a string in s and checks, if it matches the pattern
141 * given in p.
142 *
143 * Return:
144 * 0 = match.
145 * 1 = no match.
146 * 2 = no match. Would eventually match, if s would be longer.
147 *
148 * Possible Patterns:
149 *
150 * '?' matches one character
151 * '*' matches zero or more characters
152 * [xyz] matches the set of characters in brackets.
153 * [^xyz] matches any single character not in the set of characters
154 */
155
156static int
157isdn_wildmat(char *s, char *p)
158{
159 register int last;
160 register int matched;
161 register int reverse;
162 register int nostar = 1;
163
164 if (!(*s) && !(*p))
165 return(1);
166 for (; *p; s++, p++)
167 switch (*p) {
168 case '\\':
169 /*
170 * Literal match with following character,
171 * fall through.
172 */
173 p++;
174 default:
175 if (*s != *p)
176 return (*s == '\0')?2:1;
177 continue;
178 case '?':
179 /* Match anything. */
180 if (*s == '\0')
181 return (2);
182 continue;
183 case '*':
184 nostar = 0;
185 /* Trailing star matches everything. */
186 return (*++p ? isdn_star(s, p) : 0);
187 case '[':
188 /* [^....] means inverse character class. */
189 if ((reverse = (p[1] == '^')))
190 p++;
191 for (last = 0, matched = 0; *++p && (*p != ']'); last = *p)
192 /* This next line requires a good C compiler. */
193 if (*p == '-' ? *s <= *++p && *s >= last : *s == *p)
194 matched = 1;
195 if (matched == reverse)
196 return (1);
197 continue;
198 }
199 return (*s == '\0')?0:nostar;
200}
201
202int isdn_msncmp( const char * msn1, const char * msn2 )
203{
204 char TmpMsn1[ ISDN_MSNLEN ];
205 char TmpMsn2[ ISDN_MSNLEN ];
206 char *p;
207
208 for ( p = TmpMsn1; *msn1 && *msn1 != ':'; ) // Strip off a SPID
209 *p++ = *msn1++;
210 *p = '\0';
211
212 for ( p = TmpMsn2; *msn2 && *msn2 != ':'; ) // Strip off a SPID
213 *p++ = *msn2++;
214 *p = '\0';
215
216 return isdn_wildmat( TmpMsn1, TmpMsn2 );
217}
218
219int
220isdn_dc2minor(int di, int ch)
221{
222 int i;
223 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
224 if (dev->chanmap[i] == ch && dev->drvmap[i] == di)
225 return i;
226 return -1;
227}
228
229static int isdn_timer_cnt1 = 0;
230static int isdn_timer_cnt2 = 0;
231static int isdn_timer_cnt3 = 0;
232
233static void
234isdn_timer_funct(ulong dummy)
235{
236 int tf = dev->tflags;
237 if (tf & ISDN_TIMER_FAST) {
238 if (tf & ISDN_TIMER_MODEMREAD)
239 isdn_tty_readmodem();
240 if (tf & ISDN_TIMER_MODEMPLUS)
241 isdn_tty_modem_escape();
242 if (tf & ISDN_TIMER_MODEMXMIT)
243 isdn_tty_modem_xmit();
244 }
245 if (tf & ISDN_TIMER_SLOW) {
246 if (++isdn_timer_cnt1 >= ISDN_TIMER_02SEC) {
247 isdn_timer_cnt1 = 0;
248 if (tf & ISDN_TIMER_NETDIAL)
249 isdn_net_dial();
250 }
251 if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) {
252 isdn_timer_cnt2 = 0;
253 if (tf & ISDN_TIMER_NETHANGUP)
254 isdn_net_autohup();
255 if (++isdn_timer_cnt3 >= ISDN_TIMER_RINGING) {
256 isdn_timer_cnt3 = 0;
257 if (tf & ISDN_TIMER_MODEMRING)
258 isdn_tty_modem_ring();
259 }
260 if (tf & ISDN_TIMER_CARRIER)
261 isdn_tty_carrier_timeout();
262 }
263 }
264 if (tf)
265 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
266}
267
268void
269isdn_timer_ctrl(int tf, int onoff)
270{
271 unsigned long flags;
272 int old_tflags;
273
274 spin_lock_irqsave(&dev->timerlock, flags);
275 if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) {
276 /* If the slow-timer wasn't activated until now */
277 isdn_timer_cnt1 = 0;
278 isdn_timer_cnt2 = 0;
279 }
280 old_tflags = dev->tflags;
281 if (onoff)
282 dev->tflags |= tf;
283 else
284 dev->tflags &= ~tf;
285 if (dev->tflags && !old_tflags)
286 mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES);
287 spin_unlock_irqrestore(&dev->timerlock, flags);
288}
289
290/*
291 * Receive a packet from B-Channel. (Called from low-level-module)
292 */
293static void
294isdn_receive_skb_callback(int di, int channel, struct sk_buff *skb)
295{
296 int i;
297
298 if ((i = isdn_dc2minor(di, channel)) == -1) {
299 dev_kfree_skb(skb);
300 return;
301 }
302 /* Update statistics */
303 dev->ibytes[i] += skb->len;
304
305 /* First, try to deliver data to network-device */
306 if (isdn_net_rcv_skb(i, skb))
307 return;
308
309 /* V.110 handling
310 * makes sense for async streams only, so it is
311 * called after possible net-device delivery.
312 */
313 if (dev->v110[i]) {
314 atomic_inc(&dev->v110use[i]);
315 skb = isdn_v110_decode(dev->v110[i], skb);
316 atomic_dec(&dev->v110use[i]);
317 if (!skb)
318 return;
319 }
320
321 /* No network-device found, deliver to tty or raw-channel */
322 if (skb->len) {
323 if (isdn_tty_rcv_skb(i, di, channel, skb))
324 return;
325 wake_up_interruptible(&dev->drv[di]->rcv_waitq[channel]);
326 } else
327 dev_kfree_skb(skb);
328}
329
330/*
331 * Intercept command from Linklevel to Lowlevel.
332 * If layer 2 protocol is V.110 and this is not supported by current
333 * lowlevel-driver, use driver's transparent mode and handle V.110 in
334 * linklevel instead.
335 */
336int
337isdn_command(isdn_ctrl *cmd)
338{
339 if (cmd->driver == -1) {
340 printk(KERN_WARNING "isdn_command command(%x) driver -1\n", cmd->command);
341 return(1);
342 }
343 if (cmd->command == ISDN_CMD_SETL2) {
344 int idx = isdn_dc2minor(cmd->driver, cmd->arg & 255);
345 unsigned long l2prot = (cmd->arg >> 8) & 255;
346 unsigned long features = (dev->drv[cmd->driver]->interface->features
347 >> ISDN_FEATURE_L2_SHIFT) &
348 ISDN_FEATURE_L2_MASK;
349 unsigned long l2_feature = (1 << l2prot);
350
351 switch (l2prot) {
352 case ISDN_PROTO_L2_V11096:
353 case ISDN_PROTO_L2_V11019:
354 case ISDN_PROTO_L2_V11038:
355 /* If V.110 requested, but not supported by
356 * HL-driver, set emulator-flag and change
357 * Layer-2 to transparent
358 */
359 if (!(features & l2_feature)) {
360 dev->v110emu[idx] = l2prot;
361 cmd->arg = (cmd->arg & 255) |
362 (ISDN_PROTO_L2_TRANS << 8);
363 } else
364 dev->v110emu[idx] = 0;
365 }
366 }
367 return dev->drv[cmd->driver]->interface->command(cmd);
368}
369
370void
371isdn_all_eaz(int di, int ch)
372{
373 isdn_ctrl cmd;
374
375 if (di < 0)
376 return;
377 cmd.driver = di;
378 cmd.arg = ch;
379 cmd.command = ISDN_CMD_SETEAZ;
380 cmd.parm.num[0] = '\0';
381 isdn_command(&cmd);
382}
383
384/*
385 * Begin of a CAPI like LL<->HL interface, currently used only for
386 * supplementary service (CAPI 2.0 part III)
387 */
388#include <linux/isdn/capicmd.h>
389
3e206b0a 390static int
1da177e4
LT		 391isdn_capi_rec_hl_msg(capi_msg *cm) {
392
393 int di;
394 int ch;
395
396 di = (cm->adr.Controller & 0x7f) -1;
397 ch = isdn_dc2minor(di, (cm->adr.Controller>>8)& 0x7f);
398 switch(cm->Command) {
399 case CAPI_FACILITY:
400 /* in the moment only handled in tty */
401 return(isdn_tty_capi_facility(cm));
402 default:
403 return(-1);
404 }
405}
406
407static int
408isdn_status_callback(isdn_ctrl * c)
409{
410 int di;
411 u_long flags;
412 int i;
413 int r;
414 int retval = 0;
415 isdn_ctrl cmd;
416 isdn_net_dev *p;
417
418 di = c->driver;
419 i = isdn_dc2minor(di, c->arg);
420 switch (c->command) {
421 case ISDN_STAT_BSENT:
422 if (i < 0)
423 return -1;
424 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
425 return 0;
426 if (isdn_net_stat_callback(i, c))
427 return 0;
428 if (isdn_v110_stat_callback(i, c))
429 return 0;
430 if (isdn_tty_stat_callback(i, c))
431 return 0;
432 wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
433 break;
434 case ISDN_STAT_STAVAIL:
435 dev->drv[di]->stavail += c->arg;
436 wake_up_interruptible(&dev->drv[di]->st_waitq);
437 break;
438 case ISDN_STAT_RUN:
439 dev->drv[di]->flags |= DRV_FLAG_RUNNING;
440 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
441 if (dev->drvmap[i] == di)
442 isdn_all_eaz(di, dev->chanmap[i]);
443 set_global_features();
444 break;
445 case ISDN_STAT_STOP:
446 dev->drv[di]->flags &= ~DRV_FLAG_RUNNING;
447 break;
448 case ISDN_STAT_ICALL:
449 if (i < 0)
450 return -1;
451#ifdef ISDN_DEBUG_STATCALLB
452 printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
453#endif
454 if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
455 cmd.driver = di;
456 cmd.arg = c->arg;
457 cmd.command = ISDN_CMD_HANGUP;
458 isdn_command(&cmd);
459 return 0;
460 }
461 /* Try to find a network-interface which will accept incoming call */
462 r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup));
463 switch (r) {
464 case 0:
465 /* No network-device replies.
466 * Try ttyI's.
467 * These return 0 on no match, 1 on match and
468 * 3 on eventually match, if CID is longer.
469 */
470 if (c->command == ISDN_STAT_ICALL)
471 if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return(retval);
472#ifdef CONFIG_ISDN_DIVERSION
473 if (divert_if)
474 if ((retval = divert_if->stat_callback(c)))
475 return(retval); /* processed */
476#endif /* CONFIG_ISDN_DIVERSION */
477 if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) {
478 /* No tty responding */
479 cmd.driver = di;
480 cmd.arg = c->arg;
481 cmd.command = ISDN_CMD_HANGUP;
482 isdn_command(&cmd);
483 retval = 2;
484 }
485 break;
486 case 1:
487 /* Schedule connection-setup */
488 isdn_net_dial();
489 cmd.driver = di;
490 cmd.arg = c->arg;
491 cmd.command = ISDN_CMD_ACCEPTD;
492 for ( p = dev->netdev; p; p = p->next )
493 if ( p->local->isdn_channel == cmd.arg )
494 {
495 strcpy( cmd.parm.setup.eazmsn, p->local->msn );
496 isdn_command(&cmd);
497 retval = 1;
498 break;
499 }
500 break;
501
502 case 2: /* For calling back, first reject incoming call ... */
503 case 3: /* Interface found, but down, reject call actively */
504 retval = 2;
505 printk(KERN_INFO "isdn: Rejecting Call\n");
506 cmd.driver = di;
507 cmd.arg = c->arg;
508 cmd.command = ISDN_CMD_HANGUP;
509 isdn_command(&cmd);
510 if (r == 3)
511 break;
512 /* Fall through */
513 case 4:
514 /* ... then start callback. */
515 isdn_net_dial();
516 break;
517 case 5:
518 /* Number would eventually match, if longer */
519 retval = 3;
520 break;
521 }
522#ifdef ISDN_DEBUG_STATCALLB
523 printk(KERN_DEBUG "ICALL: ret=%d\n", retval);
524#endif
525 return retval;
526 break;
527 case ISDN_STAT_CINF:
528 if (i < 0)
529 return -1;
530#ifdef ISDN_DEBUG_STATCALLB
531 printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
532#endif
533 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
534 return 0;
535 if (strcmp(c->parm.num, "0"))
536 isdn_net_stat_callback(i, c);
537 isdn_tty_stat_callback(i, c);
538 break;
539 case ISDN_STAT_CAUSE:
540#ifdef ISDN_DEBUG_STATCALLB
541 printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
542#endif
543 printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
544 dev->drvid[di], c->arg, c->parm.num);
545 isdn_tty_stat_callback(i, c);
546#ifdef CONFIG_ISDN_DIVERSION
547 if (divert_if)
548 divert_if->stat_callback(c);
549#endif /* CONFIG_ISDN_DIVERSION */
550 break;
551 case ISDN_STAT_DISPLAY:
552#ifdef ISDN_DEBUG_STATCALLB
553 printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display);
554#endif
555 isdn_tty_stat_callback(i, c);
556#ifdef CONFIG_ISDN_DIVERSION
557 if (divert_if)
558 divert_if->stat_callback(c);
559#endif /* CONFIG_ISDN_DIVERSION */
560 break;
561 case ISDN_STAT_DCONN:
562 if (i < 0)
563 return -1;
564#ifdef ISDN_DEBUG_STATCALLB
565 printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
566#endif
567 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
568 return 0;
569 /* Find any net-device, waiting for D-channel setup */
570 if (isdn_net_stat_callback(i, c))
571 break;
572 isdn_v110_stat_callback(i, c);
573 /* Find any ttyI, waiting for D-channel setup */
574 if (isdn_tty_stat_callback(i, c)) {
575 cmd.driver = di;
576 cmd.arg = c->arg;
577 cmd.command = ISDN_CMD_ACCEPTB;
578 isdn_command(&cmd);
579 break;
580 }
581 break;
582 case ISDN_STAT_DHUP:
583 if (i < 0)
584 return -1;
585#ifdef ISDN_DEBUG_STATCALLB
586 printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
587#endif
588 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
589 return 0;
590 dev->drv[di]->online &= ~(1 << (c->arg));
591 isdn_info_update();
592 /* Signal hangup to network-devices */
593 if (isdn_net_stat_callback(i, c))
594 break;
595 isdn_v110_stat_callback(i, c);
596 if (isdn_tty_stat_callback(i, c))
597 break;
598#ifdef CONFIG_ISDN_DIVERSION
599 if (divert_if)
600 divert_if->stat_callback(c);
601#endif /* CONFIG_ISDN_DIVERSION */
602 break;
603 break;
604 case ISDN_STAT_BCONN:
605 if (i < 0)
606 return -1;
607#ifdef ISDN_DEBUG_STATCALLB
608 printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
609#endif
610 /* Signal B-channel-connect to network-devices */
611 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
612 return 0;
613 dev->drv[di]->online |= (1 << (c->arg));
614 isdn_info_update();
615 if (isdn_net_stat_callback(i, c))
616 break;
617 isdn_v110_stat_callback(i, c);
618 if (isdn_tty_stat_callback(i, c))
619 break;
620 break;
621 case ISDN_STAT_BHUP:
622 if (i < 0)
623 return -1;
624#ifdef ISDN_DEBUG_STATCALLB
625 printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
626#endif
627 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
628 return 0;
629 dev->drv[di]->online &= ~(1 << (c->arg));
630 isdn_info_update();
631#ifdef CONFIG_ISDN_X25
632 /* Signal hangup to network-devices */
633 if (isdn_net_stat_callback(i, c))
634 break;
635#endif
636 isdn_v110_stat_callback(i, c);
637 if (isdn_tty_stat_callback(i, c))
638 break;
639 break;
640 case ISDN_STAT_NODCH:
641 if (i < 0)
642 return -1;
643#ifdef ISDN_DEBUG_STATCALLB
644 printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
645#endif
646 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
647 return 0;
648 if (isdn_net_stat_callback(i, c))
649 break;
650 if (isdn_tty_stat_callback(i, c))
651 break;
652 break;
653 case ISDN_STAT_ADDCH:
654 spin_lock_irqsave(&dev->lock, flags);
655 if (isdn_add_channels(dev->drv[di], di, c->arg, 1)) {
656 spin_unlock_irqrestore(&dev->lock, flags);
657 return -1;
658 }
659 spin_unlock_irqrestore(&dev->lock, flags);
660 isdn_info_update();
661 break;
662 case ISDN_STAT_DISCH:
663 spin_lock_irqsave(&dev->lock, flags);
664 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
665 if ((dev->drvmap[i] == di) &&
666 (dev->chanmap[i] == c->arg)) {
667 if (c->parm.num[0])
668 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
669 else
670 if (USG_NONE(dev->usage[i])) {
671 dev->usage[i] |= ISDN_USAGE_DISABLED;
672 }
673 else
674 retval = -1;
675 break;
676 }
677 spin_unlock_irqrestore(&dev->lock, flags);
678 isdn_info_update();
679 break;
680 case ISDN_STAT_UNLOAD:
681 while (dev->drv[di]->locks > 0) {
682 isdn_unlock_driver(dev->drv[di]);
683 }
684 spin_lock_irqsave(&dev->lock, flags);
685 isdn_tty_stat_callback(i, c);
686 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
687 if (dev->drvmap[i] == di) {
688 dev->drvmap[i] = -1;
689 dev->chanmap[i] = -1;
690 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
691 }
692 dev->drivers--;
693 dev->channels -= dev->drv[di]->channels;
694 kfree(dev->drv[di]->rcverr);
695 kfree(dev->drv[di]->rcvcount);
696 for (i = 0; i < dev->drv[di]->channels; i++)
697 skb_queue_purge(&dev->drv[di]->rpqueue[i]);
698 kfree(dev->drv[di]->rpqueue);
699 kfree(dev->drv[di]->rcv_waitq);
700 kfree(dev->drv[di]);
701 dev->drv[di] = NULL;
702 dev->drvid[di][0] = '\0';
703 isdn_info_update();
704 set_global_features();
705 spin_unlock_irqrestore(&dev->lock, flags);
706 return 0;
707 case ISDN_STAT_L1ERR:
708 break;
709 case CAPI_PUT_MESSAGE:
710 return(isdn_capi_rec_hl_msg(&c->parm.cmsg));
711#ifdef CONFIG_ISDN_TTY_FAX
712 case ISDN_STAT_FAXIND:
713 isdn_tty_stat_callback(i, c);
714 break;
715#endif
716#ifdef CONFIG_ISDN_AUDIO
717 case ISDN_STAT_AUDIO:
718 isdn_tty_stat_callback(i, c);
719 break;
720#endif
721#ifdef CONFIG_ISDN_DIVERSION
722 case ISDN_STAT_PROT:
723 case ISDN_STAT_REDIR:
724 if (divert_if)
725 return(divert_if->stat_callback(c));
726#endif /* CONFIG_ISDN_DIVERSION */
727 default:
728 return -1;
729 }
730 return 0;
731}
732
733/*
734 * Get integer from char-pointer, set pointer to end of number
735 */
736int
737isdn_getnum(char **p)
738{
739 int v = -1;
740
741 while (*p[0] >= '0' && *p[0] <= '9')
742 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
743 return v;
744}
745
746#define DLE 0x10
747
748/*
749 * isdn_readbchan() tries to get data from the read-queue.
750 * It MUST be called with interrupts off.
751 *
752 * Be aware that this is not an atomic operation when sleep != 0, even though
753 * interrupts are turned off! Well, like that we are currently only called
754 * on behalf of a read system call on raw device files (which are documented
755 * to be dangerous and for for debugging purpose only). The inode semaphore
756 * takes care that this is not called for the same minor device number while
757 * we are sleeping, but access is not serialized against simultaneous read()
758 * from the corresponding ttyI device. Can other ugly events, like changes
759 * of the mapping (di,ch)<->minor, happen during the sleep? --he
760 */
761int
762isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, wait_queue_head_t *sleep)
763{
764 int count;
765 int count_pull;
766 int count_put;
767 int dflag;
768 struct sk_buff *skb;
769 u_char *cp;
770
771 if (!dev->drv[di])
772 return 0;
773 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
774 if (sleep)
775 interruptible_sleep_on(sleep);
776 else
777 return 0;
778 }
779 if (len > dev->drv[di]->rcvcount[channel])
780 len = dev->drv[di]->rcvcount[channel];
781 cp = buf;
782 count = 0;
783 while (len) {
784 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
785 break;
786#ifdef CONFIG_ISDN_AUDIO
787 if (ISDN_AUDIO_SKB_LOCK(skb))
788 break;
789 ISDN_AUDIO_SKB_LOCK(skb) = 1;
790 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
791 char *p = skb->data;
792 unsigned long DLEmask = (1 << channel);
793
794 dflag = 0;
795 count_pull = count_put = 0;
796 while ((count_pull < skb->len) && (len > 0)) {
797 len--;
798 if (dev->drv[di]->DLEflag & DLEmask) {
799 *cp++ = DLE;
800 dev->drv[di]->DLEflag &= ~DLEmask;
801 } else {
802 *cp++ = *p;
803 if (*p == DLE) {
804 dev->drv[di]->DLEflag |= DLEmask;
805 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
806 }
807 p++;
808 count_pull++;
809 }
810 count_put++;
811 }
812 if (count_pull >= skb->len)
813 dflag = 1;
814 } else {
815#endif
816 /* No DLE's in buff, so simply copy it */
817 dflag = 1;
818 if ((count_pull = skb->len) > len) {
819 count_pull = len;
820 dflag = 0;
821 }
822 count_put = count_pull;
823 memcpy(cp, skb->data, count_put);
824 cp += count_put;
825 len -= count_put;
826#ifdef CONFIG_ISDN_AUDIO
827 }
828#endif
829 count += count_put;
830 if (fp) {
831 memset(fp, 0, count_put);
832 fp += count_put;
833 }
834 if (dflag) {
835 /* We got all the data in this buff.
836 * Now we can dequeue it.
837 */
838 if (fp)
839 *(fp - 1) = 0xff;
840#ifdef CONFIG_ISDN_AUDIO
841 ISDN_AUDIO_SKB_LOCK(skb) = 0;
842#endif
843 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
844 dev_kfree_skb(skb);
845 } else {
846 /* Not yet emptied this buff, so it
847 * must stay in the queue, for further calls
848 * but we pull off the data we got until now.
849 */
850 skb_pull(skb, count_pull);
851#ifdef CONFIG_ISDN_AUDIO
852 ISDN_AUDIO_SKB_LOCK(skb) = 0;
853#endif
854 }
855 dev->drv[di]->rcvcount[channel] -= count_put;
856 }
857 return count;
858}
859
860static __inline int
861isdn_minor2drv(int minor)
862{
863 return (dev->drvmap[minor]);
864}
865
866static __inline int
867isdn_minor2chan(int minor)
868{
869 return (dev->chanmap[minor]);
870}
871
872static char *
873isdn_statstr(void)
874{
875 static char istatbuf[2048];
876 char *p;
877 int i;
878
879 sprintf(istatbuf, "idmap:\t");
880 p = istatbuf + strlen(istatbuf);
881 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
882 sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]);
883 p = istatbuf + strlen(istatbuf);
884 }
885 sprintf(p, "\nchmap:\t");
886 p = istatbuf + strlen(istatbuf);
887 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
888 sprintf(p, "%d ", dev->chanmap[i]);
889 p = istatbuf + strlen(istatbuf);
890 }
891 sprintf(p, "\ndrmap:\t");
892 p = istatbuf + strlen(istatbuf);
893 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
894 sprintf(p, "%d ", dev->drvmap[i]);
895 p = istatbuf + strlen(istatbuf);
896 }
897 sprintf(p, "\nusage:\t");
898 p = istatbuf + strlen(istatbuf);
899 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
900 sprintf(p, "%d ", dev->usage[i]);
901 p = istatbuf + strlen(istatbuf);
902 }
903 sprintf(p, "\nflags:\t");
904 p = istatbuf + strlen(istatbuf);
905 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
906 if (dev->drv[i]) {
907 sprintf(p, "%ld ", dev->drv[i]->online);
908 p = istatbuf + strlen(istatbuf);
909 } else {
910 sprintf(p, "? ");
911 p = istatbuf + strlen(istatbuf);
912 }
913 }
914 sprintf(p, "\nphone:\t");
915 p = istatbuf + strlen(istatbuf);
916 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
917 sprintf(p, "%s ", dev->num[i]);
918 p = istatbuf + strlen(istatbuf);
919 }
920 sprintf(p, "\n");
921 return istatbuf;
922}
923
924/* Module interface-code */
925
926void
927isdn_info_update(void)
928{
929 infostruct *p = dev->infochain;
930
931 while (p) {
932 *(p->private) = 1;
933 p = (infostruct *) p->next;
934 }
935 wake_up_interruptible(&(dev->info_waitq));
936}
937
938static ssize_t
939isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
940{
941 uint minor = MINOR(file->f_dentry->d_inode->i_rdev);
942 int len = 0;
943 int drvidx;
944 int chidx;
945 int retval;
946 char *p;
947
948 lock_kernel();
949 if (minor == ISDN_MINOR_STATUS) {
950 if (!file->private_data) {
951 if (file->f_flags & O_NONBLOCK) {
952 retval = -EAGAIN;
953 goto out;
954 }
955 interruptible_sleep_on(&(dev->info_waitq));
956 }
957 p = isdn_statstr();
958 file->private_data = NULL;
959 if ((len = strlen(p)) <= count) {
960 if (copy_to_user(buf, p, len)) {
961 retval = -EFAULT;
962 goto out;
963 }
964 *off += len;
965 retval = len;
966 goto out;
967 }
968 retval = 0;
969 goto out;
970 }
971 if (!dev->drivers) {
972 retval = -ENODEV;
973 goto out;
974 }
975 if (minor <= ISDN_MINOR_BMAX) {
976 printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor);
977 drvidx = isdn_minor2drv(minor);
978 if (drvidx < 0) {
979 retval = -ENODEV;
980 goto out;
981 }
982 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
983 retval = -ENODEV;
984 goto out;
985 }
986 chidx = isdn_minor2chan(minor);
987 if (!(p = kmalloc(count, GFP_KERNEL))) {
988 retval = -ENOMEM;
989 goto out;
990 }
991 len = isdn_readbchan(drvidx, chidx, p, NULL, count,
992 &dev->drv[drvidx]->rcv_waitq[chidx]);
993 *off += len;
994 if (copy_to_user(buf,p,len))
995 len = -EFAULT;
996 kfree(p);
997 retval = len;
998 goto out;
999 }
1000 if (minor <= ISDN_MINOR_CTRLMAX) {
1001 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1002 if (drvidx < 0) {
1003 retval = -ENODEV;
1004 goto out;
1005 }
1006 if (!dev->drv[drvidx]->stavail) {
1007 if (file->f_flags & O_NONBLOCK) {
1008 retval = -EAGAIN;
1009 goto out;
1010 }
1011 interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq));
1012 }
1013 if (dev->drv[drvidx]->interface->readstat) {
1014 if (count > dev->drv[drvidx]->stavail)
1015 count = dev->drv[drvidx]->stavail;
1016 len = dev->drv[drvidx]->interface->
1017 readstat(buf, count, drvidx,
1018 isdn_minor2chan(minor));
1019 } else {
1020 len = 0;
1021 }
1022 if (len)
1023 dev->drv[drvidx]->stavail -= len;
1024 else
1025 dev->drv[drvidx]->stavail = 0;
1026 *off += len;
1027 retval = len;
1028 goto out;
1029 }
1030#ifdef CONFIG_ISDN_PPP
1031 if (minor <= ISDN_MINOR_PPPMAX) {
1032 retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count);
1033 goto out;
1034 }
1035#endif
1036 retval = -ENODEV;
1037 out:
1038 unlock_kernel();
1039 return retval;
1040}
1041
1042static ssize_t
1043isdn_write(struct file *file, const char __user *buf, size_t count, loff_t * off)
1044{
1045 uint minor = MINOR(file->f_dentry->d_inode->i_rdev);
1046 int drvidx;
1047 int chidx;
1048 int retval;
1049
1050 if (minor == ISDN_MINOR_STATUS)
1051 return -EPERM;
1052 if (!dev->drivers)
1053 return -ENODEV;
1054
1055 lock_kernel();
1056 if (minor <= ISDN_MINOR_BMAX) {
1057 printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
1058 drvidx = isdn_minor2drv(minor);
1059 if (drvidx < 0) {
1060 retval = -ENODEV;
1061 goto out;
1062 }
1063 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1064 retval = -ENODEV;
1065 goto out;
1066 }
1067 chidx = isdn_minor2chan(minor);
1068 while (isdn_writebuf_stub(drvidx, chidx, buf, count) != count)
1069 interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]);
1070 retval = count;
1071 goto out;
1072 }
1073 if (minor <= ISDN_MINOR_CTRLMAX) {
1074 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1075 if (drvidx < 0) {
1076 retval = -ENODEV;
1077 goto out;
1078 }
1079 /*
1080 * We want to use the isdnctrl device to load the firmware
1081 *
1082 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1083 return -ENODEV;
1084 */
1085 if (dev->drv[drvidx]->interface->writecmd)
1086 retval = dev->drv[drvidx]->interface->
1087 writecmd(buf, count, drvidx, isdn_minor2chan(minor));
1088 else
1089 retval = count;
1090 goto out;
1091 }
1092#ifdef CONFIG_ISDN_PPP
1093 if (minor <= ISDN_MINOR_PPPMAX) {
1094 retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count);
1095 goto out;
1096 }
1097#endif
1098 retval = -ENODEV;
1099 out:
1100 unlock_kernel();
1101 return retval;
1102}
1103
1104static unsigned int
1105isdn_poll(struct file *file, poll_table * wait)
1106{
1107 unsigned int mask = 0;
1108 unsigned int minor = MINOR(file->f_dentry->d_inode->i_rdev);
1109 int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1110
1111 lock_kernel();
1112 if (minor == ISDN_MINOR_STATUS) {
1113 poll_wait(file, &(dev->info_waitq), wait);
1114 /* mask = POLLOUT | POLLWRNORM; */
1115 if (file->private_data) {
1116 mask |= POLLIN | POLLRDNORM;
1117 }
1118 goto out;
1119 }
1120 if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
1121 if (drvidx < 0) {
1122 /* driver deregistered while file open */
1123 mask = POLLHUP;
1124 goto out;
1125 }
1126 poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
1127 mask = POLLOUT | POLLWRNORM;
1128 if (dev->drv[drvidx]->stavail) {
1129 mask |= POLLIN | POLLRDNORM;
1130 }
1131 goto out;
1132 }
1133#ifdef CONFIG_ISDN_PPP
1134 if (minor <= ISDN_MINOR_PPPMAX) {
1135 mask = isdn_ppp_poll(file, wait);
1136 goto out;
1137 }
1138#endif
1139 mask = POLLERR;
1140 out:
1141 unlock_kernel();
1142 return mask;
1143}
1144
1145
1146static int
1147isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
1148{
1149 uint minor = MINOR(inode->i_rdev);
1150 isdn_ctrl c;
1151 int drvidx;
1152 int chidx;
1153 int ret;
1154 int i;
1155 char __user *p;
1156 char *s;
1157 union iocpar {
1158 char name[10];
1159 char bname[22];
1160 isdn_ioctl_struct iocts;
1161 isdn_net_ioctl_phone phone;
1162 isdn_net_ioctl_cfg cfg;
1163 } iocpar;
1164 void __user *argp = (void __user *)arg;
1165
1166#define name iocpar.name
1167#define bname iocpar.bname
1168#define iocts iocpar.iocts
1169#define phone iocpar.phone
1170#define cfg iocpar.cfg
1171
1172 if (minor == ISDN_MINOR_STATUS) {
1173 switch (cmd) {
1174 case IIOCGETDVR:
1175 return (TTY_DV +
1176 (NET_DV << 8) +
1177 (INF_DV << 16));
1178 case IIOCGETCPS:
1179 if (arg) {
1180 ulong __user *p = argp;
1181 int i;
1182 if (!access_ok(VERIFY_WRITE, p,
1183 sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
1184 return -EFAULT;
1185 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1186 put_user(dev->ibytes[i], p++);
1187 put_user(dev->obytes[i], p++);
1188 }
1189 return 0;
1190 } else
1191 return -EINVAL;
1192 break;
1193#ifdef CONFIG_NETDEVICES
1194 case IIOCNETGPN:
1195 /* Get peer phone number of a connected
1196 * isdn network interface */
1197 if (arg) {
1198 if (copy_from_user(&phone, argp, sizeof(phone)))
1199 return -EFAULT;
1200 return isdn_net_getpeer(&phone, argp);
1201 } else
1202 return -EINVAL;
1203#endif
1204 default:
1205 return -EINVAL;
1206 }
1207 }
1208 if (!dev->drivers)
1209 return -ENODEV;
1210 if (minor <= ISDN_MINOR_BMAX) {
1211 drvidx = isdn_minor2drv(minor);
1212 if (drvidx < 0)
1213 return -ENODEV;
1214 chidx = isdn_minor2chan(minor);
1215 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1216 return -ENODEV;
1217 return 0;
1218 }
1219 if (minor <= ISDN_MINOR_CTRLMAX) {
1220/*
1221 * isdn net devices manage lots of configuration variables as linked lists.
1222 * Those lists must only be manipulated from user space. Some of the ioctl's
1223 * service routines access user space and are not atomic. Therefor, ioctl's
1224 * manipulating the lists and ioctl's sleeping while accessing the lists
1225 * are serialized by means of a semaphore.
1226 */
1227 switch (cmd) {
1228 case IIOCNETDWRSET:
1229 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1230 return(-EINVAL);
1231 case IIOCNETLCR:
1232 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1233 return -ENODEV;
1234#ifdef CONFIG_NETDEVICES
1235 case IIOCNETAIF:
1236 /* Add a network-interface */
1237 if (arg) {
1238 if (copy_from_user(name, argp, sizeof(name)))
1239 return -EFAULT;
1240 s = name;
1241 } else {
1242 s = NULL;
1243 }
1244 ret = down_interruptible(&dev->sem);
1245 if( ret ) return ret;
1246 if ((s = isdn_net_new(s, NULL))) {
1247 if (copy_to_user(argp, s, strlen(s) + 1)){
1248 ret = -EFAULT;
1249 } else {
1250 ret = 0;
1251 }
1252 } else
1253 ret = -ENODEV;
1254 up(&dev->sem);
1255 return ret;
1256 case IIOCNETASL:
1257 /* Add a slave to a network-interface */
1258 if (arg) {
1259 if (copy_from_user(bname, argp, sizeof(bname) - 1))
1260 return -EFAULT;
1261 } else
1262 return -EINVAL;
1263 ret = down_interruptible(&dev->sem);
1264 if( ret ) return ret;
1265 if ((s = isdn_net_newslave(bname))) {
1266 if (copy_to_user(argp, s, strlen(s) + 1)){
1267 ret = -EFAULT;
1268 } else {
1269 ret = 0;
1270 }
1271 } else
1272 ret = -ENODEV;
1273 up(&dev->sem);
1274 return ret;
1275 case IIOCNETDIF:
1276 /* Delete a network-interface */
1277 if (arg) {
1278 if (copy_from_user(name, argp, sizeof(name)))
1279 return -EFAULT;
1280 ret = down_interruptible(&dev->sem);
1281 if( ret ) return ret;
1282 ret = isdn_net_rm(name);
1283 up(&dev->sem);
1284 return ret;
1285 } else
1286 return -EINVAL;
1287 case IIOCNETSCF:
1288 /* Set configurable parameters of a network-interface */
1289 if (arg) {
1290 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1291 return -EFAULT;
1292 return isdn_net_setcfg(&cfg);
1293 } else
1294 return -EINVAL;
1295 case IIOCNETGCF:
1296 /* Get configurable parameters of a network-interface */
1297 if (arg) {
1298 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1299 return -EFAULT;
1300 if (!(ret = isdn_net_getcfg(&cfg))) {
1301 if (copy_to_user(argp, &cfg, sizeof(cfg)))
1302 return -EFAULT;
1303 }
1304 return ret;
1305 } else
1306 return -EINVAL;
1307 case IIOCNETANM:
1308 /* Add a phone-number to a network-interface */
1309 if (arg) {
1310 if (copy_from_user(&phone, argp, sizeof(phone)))
1311 return -EFAULT;
1312 ret = down_interruptible(&dev->sem);
1313 if( ret ) return ret;
1314 ret = isdn_net_addphone(&phone);
1315 up(&dev->sem);
1316 return ret;
1317 } else
1318 return -EINVAL;
1319 case IIOCNETGNM:
1320 /* Get list of phone-numbers of a network-interface */
1321 if (arg) {
1322 if (copy_from_user(&phone, argp, sizeof(phone)))
1323 return -EFAULT;
1324 ret = down_interruptible(&dev->sem);
1325 if( ret ) return ret;
1326 ret = isdn_net_getphones(&phone, argp);
1327 up(&dev->sem);
1328 return ret;
1329 } else
1330 return -EINVAL;
1331 case IIOCNETDNM:
1332 /* Delete a phone-number of a network-interface */
1333 if (arg) {
1334 if (copy_from_user(&phone, argp, sizeof(phone)))
1335 return -EFAULT;
1336 ret = down_interruptible(&dev->sem);
1337 if( ret ) return ret;
1338 ret = isdn_net_delphone(&phone);
1339 up(&dev->sem);
1340 return ret;
1341 } else
1342 return -EINVAL;
1343 case IIOCNETDIL:
1344 /* Force dialing of a network-interface */
1345 if (arg) {
1346 if (copy_from_user(name, argp, sizeof(name)))
1347 return -EFAULT;
1348 return isdn_net_force_dial(name);
1349 } else
1350 return -EINVAL;
1351#ifdef CONFIG_ISDN_PPP
1352 case IIOCNETALN:
1353 if (!arg)
1354 return -EINVAL;
1355 if (copy_from_user(name, argp, sizeof(name)))
1356 return -EFAULT;
1357 return isdn_ppp_dial_slave(name);
1358 case IIOCNETDLN:
1359 if (!arg)
1360 return -EINVAL;
1361 if (copy_from_user(name, argp, sizeof(name)))
1362 return -EFAULT;
1363 return isdn_ppp_hangup_slave(name);
1364#endif
1365 case IIOCNETHUP:
1366 /* Force hangup of a network-interface */
1367 if (!arg)
1368 return -EINVAL;
1369 if (copy_from_user(name, argp, sizeof(name)))
1370 return -EFAULT;
1371 return isdn_net_force_hangup(name);
1372 break;
1373#endif /* CONFIG_NETDEVICES */
1374 case IIOCSETVER:
1375 dev->net_verbose = arg;
1376 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1377 return 0;
1378 case IIOCSETGST:
1379 if (arg)
1380 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1381 else
1382 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1383 printk(KERN_INFO "isdn: Global Mode %s\n",
1384 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1385 return 0;
1386 case IIOCSETBRJ:
1387 drvidx = -1;
1388 if (arg) {
1389 int i;
1390 char *p;
1391 if (copy_from_user(&iocts, argp,
1392 sizeof(isdn_ioctl_struct)))
1393 return -EFAULT;
1394 if (strlen(iocts.drvid)) {
1395 if ((p = strchr(iocts.drvid, ',')))
1396 *p = 0;
1397 drvidx = -1;
1398 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1399 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1400 drvidx = i;
1401 break;
1402 }
1403 }
1404 }
1405 if (drvidx == -1)
1406 return -ENODEV;
1407 if (iocts.arg)
1408 dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1409 else
1410 dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1411 return 0;
1412 case IIOCSIGPRF:
1413 dev->profd = current;
1414 return 0;
1415 break;
1416 case IIOCGETPRF:
1417 /* Get all Modem-Profiles */
1418 if (arg) {
1419 char __user *p = argp;
1420 int i;
1421
1422 if (!access_ok(VERIFY_WRITE, argp,
1423 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1424 * ISDN_MAX_CHANNELS))
1425 return -EFAULT;
1426
1427 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1428 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1429 ISDN_MODEM_NUMREG))
1430 return -EFAULT;
1431 p += ISDN_MODEM_NUMREG;
1432 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1433 return -EFAULT;
1434 p += ISDN_MSNLEN;
1435 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1436 return -EFAULT;
1437 p += ISDN_LMSNLEN;
1438 }
1439 return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1440 } else
1441 return -EINVAL;
1442 break;
1443 case IIOCSETPRF:
1444 /* Set all Modem-Profiles */
1445 if (arg) {
1446 char __user *p = argp;
1447 int i;
1448
1449 if (!access_ok(VERIFY_READ, argp,
1450 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1451 * ISDN_MAX_CHANNELS))
1452 return -EFAULT;
1453
1454 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1455 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1456 ISDN_MODEM_NUMREG))
1457 return -EFAULT;
1458 p += ISDN_MODEM_NUMREG;
1459 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1460 return -EFAULT;
1461 p += ISDN_LMSNLEN;
1462 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1463 return -EFAULT;
1464 p += ISDN_MSNLEN;
1465 }
1466 return 0;
1467 } else
1468 return -EINVAL;
1469 break;
1470 case IIOCSETMAP:
1471 case IIOCGETMAP:
1472 /* Set/Get MSN->EAZ-Mapping for a driver */
1473 if (arg) {
1474
1475 if (copy_from_user(&iocts, argp,
1476 sizeof(isdn_ioctl_struct)))
1477 return -EFAULT;
1478 if (strlen(iocts.drvid)) {
1479 drvidx = -1;
1480 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1481 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1482 drvidx = i;
1483 break;
1484 }
1485 } else
1486 drvidx = 0;
1487 if (drvidx == -1)
1488 return -ENODEV;
1489 if (cmd == IIOCSETMAP) {
1490 int loop = 1;
1491
1492 p = (char __user *) iocts.arg;
1493 i = 0;
1494 while (loop) {
1495 int j = 0;
1496
1497 while (1) {
1498 if (!access_ok(VERIFY_READ, p, 1))
1499 return -EFAULT;
1500 get_user(bname[j], p++);
1501 switch (bname[j]) {
1502 case '\0':
1503 loop = 0;
1504 /* Fall through */
1505 case ',':
1506 bname[j] = '\0';
1507 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1508 j = ISDN_MSNLEN;
1509 break;
1510 default:
1511 j++;
1512 }
1513 if (j >= ISDN_MSNLEN)
1514 break;
1515 }
1516 if (++i > 9)
1517 break;
1518 }
1519 } else {
1520 p = (char __user *) iocts.arg;
1521 for (i = 0; i < 10; i++) {
1522 sprintf(bname, "%s%s",
1523 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1524 dev->drv[drvidx]->msn2eaz[i] : "_",
1525 (i < 9) ? "," : "\0");
1526 if (copy_to_user(p, bname, strlen(bname) + 1))
1527 return -EFAULT;
1528 p += strlen(bname);
1529 }
1530 }
1531 return 0;
1532 } else
1533 return -EINVAL;
1534 case IIOCDBGVAR:
1535 if (arg) {
1536 if (copy_to_user(argp, &dev, sizeof(ulong)))
1537 return -EFAULT;
1538 return 0;
1539 } else
1540 return -EINVAL;
1541 break;
1542 default:
1543 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1544 cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1545 else
1546 return -EINVAL;
1547 if (arg) {
1548 int i;
1549 char *p;
1550 if (copy_from_user(&iocts, argp, sizeof(isdn_ioctl_struct)))
1551 return -EFAULT;
1552 if (strlen(iocts.drvid)) {
1553 if ((p = strchr(iocts.drvid, ',')))
1554 *p = 0;
1555 drvidx = -1;
1556 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1557 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1558 drvidx = i;
1559 break;
1560 }
1561 } else
1562 drvidx = 0;
1563 if (drvidx == -1)
1564 return -ENODEV;
1565 if (!access_ok(VERIFY_WRITE, argp,
1566 sizeof(isdn_ioctl_struct)))
1567 return -EFAULT;
1568 c.driver = drvidx;
1569 c.command = ISDN_CMD_IOCTL;
1570 c.arg = cmd;
1571 memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
1572 ret = isdn_command(&c);
1573 memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
1574 if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
1575 return -EFAULT;
1576 return ret;
1577 } else
1578 return -EINVAL;
1579 }
1580 }
1581#ifdef CONFIG_ISDN_PPP
1582 if (minor <= ISDN_MINOR_PPPMAX)
1583 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1584#endif
1585 return -ENODEV;
1586
1587#undef name
1588#undef bname
1589#undef iocts
1590#undef phone
1591#undef cfg
1592}
1593
1594/*
1595 * Open the device code.
1596 */
1597static int
1598isdn_open(struct inode *ino, struct file *filep)
1599{
1600 uint minor = MINOR(ino->i_rdev);
1601 int drvidx;
1602 int chidx;
1603 int retval = -ENODEV;
1604
1605
1606 if (minor == ISDN_MINOR_STATUS) {
1607 infostruct *p;
1608
1609 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1610 p->next = (char *) dev->infochain;
1611 p->private = (char *) &(filep->private_data);
1612 dev->infochain = p;
1613 /* At opening we allow a single update */
1614 filep->private_data = (char *) 1;
1615 retval = 0;
1616 goto out;
1617 } else {
1618 retval = -ENOMEM;
1619 goto out;
1620 }
1621 }
1622 if (!dev->channels)
1623 goto out;
1624 if (minor <= ISDN_MINOR_BMAX) {
1625 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1626 drvidx = isdn_minor2drv(minor);
1627 if (drvidx < 0)
1628 goto out;
1629 chidx = isdn_minor2chan(minor);
1630 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1631 goto out;
1632 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1633 goto out;
1634 isdn_lock_drivers();
1635 retval = 0;
1636 goto out;
1637 }
1638 if (minor <= ISDN_MINOR_CTRLMAX) {
1639 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1640 if (drvidx < 0)
1641 goto out;
1642 isdn_lock_drivers();
1643 retval = 0;
1644 goto out;
1645 }
1646#ifdef CONFIG_ISDN_PPP
1647 if (minor <= ISDN_MINOR_PPPMAX) {
1648 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1649 if (retval == 0)
1650 isdn_lock_drivers();
1651 goto out;
1652 }
1653#endif
1654 out:
1655 nonseekable_open(ino, filep);
1656 return retval;
1657}
1658
1659static int
1660isdn_close(struct inode *ino, struct file *filep)
1661{
1662 uint minor = MINOR(ino->i_rdev);
1663
1664 lock_kernel();
1665 if (minor == ISDN_MINOR_STATUS) {
1666 infostruct *p = dev->infochain;
1667 infostruct *q = NULL;
1668
1669 while (p) {
1670 if (p->private == (char *) &(filep->private_data)) {
1671 if (q)
1672 q->next = p->next;
1673 else
1674 dev->infochain = (infostruct *) (p->next);
1675 kfree(p);
1676 goto out;
1677 }
1678 q = p;
1679 p = (infostruct *) (p->next);
1680 }
1681 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1682 goto out;
1683 }
1684 isdn_unlock_drivers();
1685 if (minor <= ISDN_MINOR_BMAX)
1686 goto out;
1687 if (minor <= ISDN_MINOR_CTRLMAX) {
1688 if (dev->profd == current)
1689 dev->profd = NULL;
1690 goto out;
1691 }
1692#ifdef CONFIG_ISDN_PPP
1693 if (minor <= ISDN_MINOR_PPPMAX)
1694 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1695#endif
1696
1697 out:
1698 unlock_kernel();
1699 return 0;
1700}
1701
1702static struct file_operations isdn_fops =
1703{
1704 .owner = THIS_MODULE,
1705 .llseek = no_llseek,
1706 .read = isdn_read,
1707 .write = isdn_write,
1708 .poll = isdn_poll,
1709 .ioctl = isdn_ioctl,
1710 .open = isdn_open,
1711 .release = isdn_close,
1712};
1713
1714char *
1715isdn_map_eaz2msn(char *msn, int di)
1716{
1717 isdn_driver_t *this = dev->drv[di];
1718 int i;
1719
1720 if (strlen(msn) == 1) {
1721 i = msn[0] - '0';
1722 if ((i >= 0) && (i <= 9))
1723 if (strlen(this->msn2eaz[i]))
1724 return (this->msn2eaz[i]);
1725 }
1726 return (msn);
1727}
1728
1729/*
1730 * Find an unused ISDN-channel, whose feature-flags match the
1731 * given L2- and L3-protocols.
1732 */
1733#define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1734
1735/*
1736 * This function must be called with holding the dev->lock.
1737 */
1738int
1739isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1740 ,int pre_chan, char *msn)
1741{
1742 int i;
1743 ulong features;
1744 ulong vfeatures;
1745
1746 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1747 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1748 ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1749 /* If Layer-2 protocol is V.110, accept drivers with
1750 * transparent feature even if these don't support V.110
1751 * because we can emulate this in linklevel.
1752 */
1753 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1754 if (USG_NONE(dev->usage[i]) &&
1755 (dev->drvmap[i] != -1)) {
1756 int d = dev->drvmap[i];
1757 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1758 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1759 continue;
1760 if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1761 continue;
1762 if (dev->usage[i] & ISDN_USAGE_DISABLED)
1763 continue; /* usage not allowed */
1764 if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1765 if (((dev->drv[d]->interface->features & features) == features) ||
1766 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1767 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1768 if ((pre_dev < 0) || (pre_chan < 0)) {
1769 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1770 dev->usage[i] |= usage;
1771 isdn_info_update();
1772 return i;
1773 } else {
1774 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1775 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1776 dev->usage[i] |= usage;
1777 isdn_info_update();
1778 return i;
1779 }
1780 }
1781 }
1782 }
1783 }
1784 return -1;
1785}
1786
1787/*
1788 * Set state of ISDN-channel to 'unused'
1789 */
1790void
1791isdn_free_channel(int di, int ch, int usage)
1792{
1793 int i;
1794
1795 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1796 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1797 (dev->drvmap[i] == di) &&
1798 (dev->chanmap[i] == ch)) {
1799 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1800 strcpy(dev->num[i], "???");
1801 dev->ibytes[i] = 0;
1802 dev->obytes[i] = 0;
1803// 20.10.99 JIM, try to reinitialize v110 !
1804 dev->v110emu[i] = 0;
1805 atomic_set(&(dev->v110use[i]), 0);
1806 isdn_v110_close(dev->v110[i]);
1807 dev->v110[i] = NULL;
1808// 20.10.99 JIM, try to reinitialize v110 !
1809 isdn_info_update();
1810 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1811 }
1812}
1813
1814/*
1815 * Cancel Exclusive-Flag for ISDN-channel
1816 */
1817void
1818isdn_unexclusive_channel(int di, int ch)
1819{
1820 int i;
1821
1822 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1823 if ((dev->drvmap[i] == di) &&
1824 (dev->chanmap[i] == ch)) {
1825 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1826 isdn_info_update();
1827 return;
1828 }
1829}
1830
1831/*
1832 * writebuf replacement for SKB_ABLE drivers
1833 */
1834static int
1835isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len)
1836{
1837 int ret;
1838 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1839 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1840
1841 if (!skb)
1842 return 0;
1843 skb_reserve(skb, hl);
1844 copy_from_user(skb_put(skb, len), buf, len);
1845 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
1846 if (ret <= 0)
1847 dev_kfree_skb(skb);
1848 if (ret > 0)
1849 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
1850 return ret;
1851}
1852
1853/*
1854 * Return: length of data on success, -ERRcode on failure.
1855 */
1856int
1857isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
1858{
1859 int ret;
1860 struct sk_buff *nskb = NULL;
1861 int v110_ret = skb->len;
1862 int idx = isdn_dc2minor(drvidx, chan);
1863
1864 if (dev->v110[idx]) {
1865 atomic_inc(&dev->v110use[idx]);
1866 nskb = isdn_v110_encode(dev->v110[idx], skb);
1867 atomic_dec(&dev->v110use[idx]);
1868 if (!nskb)
1869 return 0;
1870 v110_ret = *((int *)nskb->data);
1871 skb_pull(nskb, sizeof(int));
1872 if (!nskb->len) {
1873 dev_kfree_skb(nskb);
1874 return v110_ret;
1875 }
1876 /* V.110 must always be acknowledged */
1877 ack = 1;
1878 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
1879 } else {
1880 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1881
1882 if( skb_headroom(skb) < hl ){
1883 /*
1884 * This should only occur when new HL driver with
1885 * increased hl_hdrlen was loaded after netdevice
1886 * was created and connected to the new driver.
1887 *
1888 * The V.110 branch (re-allocates on its own) does
1889 * not need this
1890 */
1891 struct sk_buff * skb_tmp;
1892
1893 skb_tmp = skb_realloc_headroom(skb, hl);
1894 printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
1895 if (!skb_tmp) return -ENOMEM; /* 0 better? */
1896 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
1897 if( ret > 0 ){
1898 dev_kfree_skb(skb);
1899 } else {
1900 dev_kfree_skb(skb_tmp);
1901 }
1902 } else {
1903 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
1904 }
1905 }
1906 if (ret > 0) {
1907 dev->obytes[idx] += ret;
1908 if (dev->v110[idx]) {
1909 atomic_inc(&dev->v110use[idx]);
1910 dev->v110[idx]->skbuser++;
1911 atomic_dec(&dev->v110use[idx]);
1912 /* For V.110 return unencoded data length */
1913 ret = v110_ret;
1914 /* if the complete frame was send we free the skb;
1915 if not upper function will requeue the skb */
1916 if (ret == skb->len)
1917 dev_kfree_skb(skb);
1918 }
1919 } else
1920 if (dev->v110[idx])
1921 dev_kfree_skb(nskb);
1922 return ret;
1923}
1924
3e206b0a 1925static int
1da177e4
LT		 1926isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
1927{
1928 int j, k, m;
1929
1930 init_waitqueue_head(&d->st_waitq);
1931 if (d->flags & DRV_FLAG_RUNNING)
1932 return -1;
1933 if (n < 1) return 0;
1934
1935 m = (adding) ? d->channels + n : n;
1936
1937 if (dev->channels + n > ISDN_MAX_CHANNELS) {
1938 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
1939 ISDN_MAX_CHANNELS);
1940 return -1;
1941 }
1942
1943 if ((adding) && (d->rcverr))
1944 kfree(d->rcverr);
1945 if (!(d->rcverr = kmalloc(sizeof(int) * m, GFP_ATOMIC))) {
1946 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
1947 return -1;
1948 }
1949 memset((char *) d->rcverr, 0, sizeof(int) * m);
1950
1951 if ((adding) && (d->rcvcount))
1952 kfree(d->rcvcount);
1953 if (!(d->rcvcount = kmalloc(sizeof(int) * m, GFP_ATOMIC))) {
1954 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
f9101210
JJ		 1955 if (!adding)
1956 kfree(d->rcverr);
1da177e4
LT		 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
2012static void
2013set_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
2028static 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
2035static 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
2045int 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
2071EXPORT_SYMBOL(DIVERT_REG_NAME);
2072
2073#endif /* CONFIG_ISDN_DIVERSION */
2074
2075
2076EXPORT_SYMBOL(register_isdn);
2077#ifdef CONFIG_ISDN_PPP
2078EXPORT_SYMBOL(isdn_ppp_register_compressor);
2079EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2080#endif
2081
2082int
2083register_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
2144static char *
2145isdn_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 */
2162static 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 */
2235static 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
2252module_init(isdn_init);
2253module_exit(isdn_exit);
Linux 6.x block layer and io_uring tree(s)