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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / isdn / i4l / isdn_common.c
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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
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/init.h>
1da177e4 16#include <linux/poll.h>
5a0e3ad6 17#include <linux/slab.h>
1da177e4
LT		 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 }
09fca29d
KK		 343 if (!dev->drv[cmd->driver]) {
344 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d] NULL\n",
345 cmd->command, cmd->driver);
346 return(1);
347 }
348 if (!dev->drv[cmd->driver]->interface) {
349 printk(KERN_WARNING "isdn_command command(%x) dev->drv[%d]->interface NULL\n",
350 cmd->command, cmd->driver);
351 return(1);
352 }
1da177e4
LT		 353 if (cmd->command == ISDN_CMD_SETL2) {
354 int idx = isdn_dc2minor(cmd->driver, cmd->arg & 255);
355 unsigned long l2prot = (cmd->arg >> 8) & 255;
356 unsigned long features = (dev->drv[cmd->driver]->interface->features
357 >> ISDN_FEATURE_L2_SHIFT) &
358 ISDN_FEATURE_L2_MASK;
359 unsigned long l2_feature = (1 << l2prot);
360
361 switch (l2prot) {
362 case ISDN_PROTO_L2_V11096:
363 case ISDN_PROTO_L2_V11019:
364 case ISDN_PROTO_L2_V11038:
365 /* If V.110 requested, but not supported by
366 * HL-driver, set emulator-flag and change
367 * Layer-2 to transparent
368 */
369 if (!(features & l2_feature)) {
370 dev->v110emu[idx] = l2prot;
371 cmd->arg = (cmd->arg & 255) |
372 (ISDN_PROTO_L2_TRANS << 8);
373 } else
374 dev->v110emu[idx] = 0;
375 }
376 }
377 return dev->drv[cmd->driver]->interface->command(cmd);
378}
379
380void
381isdn_all_eaz(int di, int ch)
382{
383 isdn_ctrl cmd;
384
385 if (di < 0)
386 return;
387 cmd.driver = di;
388 cmd.arg = ch;
389 cmd.command = ISDN_CMD_SETEAZ;
390 cmd.parm.num[0] = '\0';
391 isdn_command(&cmd);
392}
393
394/*
395 * Begin of a CAPI like LL<->HL interface, currently used only for
396 * supplementary service (CAPI 2.0 part III)
397 */
398#include <linux/isdn/capicmd.h>
399
3e206b0a 400static int
1da177e4
LT		 401isdn_capi_rec_hl_msg(capi_msg *cm) {
402
403 int di;
404 int ch;
405
406 di = (cm->adr.Controller & 0x7f) -1;
407 ch = isdn_dc2minor(di, (cm->adr.Controller>>8)& 0x7f);
408 switch(cm->Command) {
409 case CAPI_FACILITY:
410 /* in the moment only handled in tty */
411 return(isdn_tty_capi_facility(cm));
412 default:
413 return(-1);
414 }
415}
416
417static int
418isdn_status_callback(isdn_ctrl * c)
419{
420 int di;
421 u_long flags;
422 int i;
423 int r;
424 int retval = 0;
425 isdn_ctrl cmd;
426 isdn_net_dev *p;
427
428 di = c->driver;
429 i = isdn_dc2minor(di, c->arg);
430 switch (c->command) {
431 case ISDN_STAT_BSENT:
432 if (i < 0)
433 return -1;
434 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
435 return 0;
436 if (isdn_net_stat_callback(i, c))
437 return 0;
438 if (isdn_v110_stat_callback(i, c))
439 return 0;
440 if (isdn_tty_stat_callback(i, c))
441 return 0;
442 wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]);
443 break;
444 case ISDN_STAT_STAVAIL:
445 dev->drv[di]->stavail += c->arg;
446 wake_up_interruptible(&dev->drv[di]->st_waitq);
447 break;
448 case ISDN_STAT_RUN:
449 dev->drv[di]->flags |= DRV_FLAG_RUNNING;
450 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
451 if (dev->drvmap[i] == di)
452 isdn_all_eaz(di, dev->chanmap[i]);
453 set_global_features();
454 break;
455 case ISDN_STAT_STOP:
456 dev->drv[di]->flags &= ~DRV_FLAG_RUNNING;
457 break;
458 case ISDN_STAT_ICALL:
459 if (i < 0)
460 return -1;
461#ifdef ISDN_DEBUG_STATCALLB
462 printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num);
463#endif
464 if (dev->global_flags & ISDN_GLOBAL_STOPPED) {
465 cmd.driver = di;
466 cmd.arg = c->arg;
467 cmd.command = ISDN_CMD_HANGUP;
468 isdn_command(&cmd);
469 return 0;
470 }
471 /* Try to find a network-interface which will accept incoming call */
472 r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup));
473 switch (r) {
474 case 0:
475 /* No network-device replies.
476 * Try ttyI's.
477 * These return 0 on no match, 1 on match and
478 * 3 on eventually match, if CID is longer.
479 */
480 if (c->command == ISDN_STAT_ICALL)
481 if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return(retval);
482#ifdef CONFIG_ISDN_DIVERSION
483 if (divert_if)
484 if ((retval = divert_if->stat_callback(c)))
485 return(retval); /* processed */
486#endif /* CONFIG_ISDN_DIVERSION */
487 if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) {
488 /* No tty responding */
489 cmd.driver = di;
490 cmd.arg = c->arg;
491 cmd.command = ISDN_CMD_HANGUP;
492 isdn_command(&cmd);
493 retval = 2;
494 }
495 break;
496 case 1:
497 /* Schedule connection-setup */
498 isdn_net_dial();
499 cmd.driver = di;
500 cmd.arg = c->arg;
501 cmd.command = ISDN_CMD_ACCEPTD;
502 for ( p = dev->netdev; p; p = p->next )
503 if ( p->local->isdn_channel == cmd.arg )
504 {
505 strcpy( cmd.parm.setup.eazmsn, p->local->msn );
506 isdn_command(&cmd);
507 retval = 1;
508 break;
509 }
510 break;
511
512 case 2: /* For calling back, first reject incoming call ... */
513 case 3: /* Interface found, but down, reject call actively */
514 retval = 2;
515 printk(KERN_INFO "isdn: Rejecting Call\n");
516 cmd.driver = di;
517 cmd.arg = c->arg;
518 cmd.command = ISDN_CMD_HANGUP;
519 isdn_command(&cmd);
520 if (r == 3)
521 break;
522 /* Fall through */
523 case 4:
524 /* ... then start callback. */
525 isdn_net_dial();
526 break;
527 case 5:
528 /* Number would eventually match, if longer */
529 retval = 3;
530 break;
531 }
532#ifdef ISDN_DEBUG_STATCALLB
533 printk(KERN_DEBUG "ICALL: ret=%d\n", retval);
534#endif
535 return retval;
536 break;
537 case ISDN_STAT_CINF:
538 if (i < 0)
539 return -1;
540#ifdef ISDN_DEBUG_STATCALLB
541 printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num);
542#endif
543 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
544 return 0;
545 if (strcmp(c->parm.num, "0"))
546 isdn_net_stat_callback(i, c);
547 isdn_tty_stat_callback(i, c);
548 break;
549 case ISDN_STAT_CAUSE:
550#ifdef ISDN_DEBUG_STATCALLB
551 printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num);
552#endif
553 printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n",
554 dev->drvid[di], c->arg, c->parm.num);
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_DISPLAY:
562#ifdef ISDN_DEBUG_STATCALLB
563 printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display);
564#endif
565 isdn_tty_stat_callback(i, c);
566#ifdef CONFIG_ISDN_DIVERSION
567 if (divert_if)
568 divert_if->stat_callback(c);
569#endif /* CONFIG_ISDN_DIVERSION */
570 break;
571 case ISDN_STAT_DCONN:
572 if (i < 0)
573 return -1;
574#ifdef ISDN_DEBUG_STATCALLB
575 printk(KERN_DEBUG "DCONN: %ld\n", c->arg);
576#endif
577 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
578 return 0;
579 /* Find any net-device, waiting for D-channel setup */
580 if (isdn_net_stat_callback(i, c))
581 break;
582 isdn_v110_stat_callback(i, c);
583 /* Find any ttyI, waiting for D-channel setup */
584 if (isdn_tty_stat_callback(i, c)) {
585 cmd.driver = di;
586 cmd.arg = c->arg;
587 cmd.command = ISDN_CMD_ACCEPTB;
588 isdn_command(&cmd);
589 break;
590 }
591 break;
592 case ISDN_STAT_DHUP:
593 if (i < 0)
594 return -1;
595#ifdef ISDN_DEBUG_STATCALLB
596 printk(KERN_DEBUG "DHUP: %ld\n", c->arg);
597#endif
598 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
599 return 0;
600 dev->drv[di]->online &= ~(1 << (c->arg));
601 isdn_info_update();
602 /* Signal hangup to network-devices */
603 if (isdn_net_stat_callback(i, c))
604 break;
605 isdn_v110_stat_callback(i, c);
606 if (isdn_tty_stat_callback(i, c))
607 break;
608#ifdef CONFIG_ISDN_DIVERSION
609 if (divert_if)
610 divert_if->stat_callback(c);
611#endif /* CONFIG_ISDN_DIVERSION */
612 break;
613 break;
614 case ISDN_STAT_BCONN:
615 if (i < 0)
616 return -1;
617#ifdef ISDN_DEBUG_STATCALLB
618 printk(KERN_DEBUG "BCONN: %ld\n", c->arg);
619#endif
620 /* Signal B-channel-connect to network-devices */
621 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
622 return 0;
623 dev->drv[di]->online |= (1 << (c->arg));
624 isdn_info_update();
625 if (isdn_net_stat_callback(i, c))
626 break;
627 isdn_v110_stat_callback(i, c);
628 if (isdn_tty_stat_callback(i, c))
629 break;
630 break;
631 case ISDN_STAT_BHUP:
632 if (i < 0)
633 return -1;
634#ifdef ISDN_DEBUG_STATCALLB
635 printk(KERN_DEBUG "BHUP: %ld\n", c->arg);
636#endif
637 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
638 return 0;
639 dev->drv[di]->online &= ~(1 << (c->arg));
640 isdn_info_update();
641#ifdef CONFIG_ISDN_X25
642 /* Signal hangup to network-devices */
643 if (isdn_net_stat_callback(i, c))
644 break;
645#endif
646 isdn_v110_stat_callback(i, c);
647 if (isdn_tty_stat_callback(i, c))
648 break;
649 break;
650 case ISDN_STAT_NODCH:
651 if (i < 0)
652 return -1;
653#ifdef ISDN_DEBUG_STATCALLB
654 printk(KERN_DEBUG "NODCH: %ld\n", c->arg);
655#endif
656 if (dev->global_flags & ISDN_GLOBAL_STOPPED)
657 return 0;
658 if (isdn_net_stat_callback(i, c))
659 break;
660 if (isdn_tty_stat_callback(i, c))
661 break;
662 break;
663 case ISDN_STAT_ADDCH:
664 spin_lock_irqsave(&dev->lock, flags);
665 if (isdn_add_channels(dev->drv[di], di, c->arg, 1)) {
666 spin_unlock_irqrestore(&dev->lock, flags);
667 return -1;
668 }
669 spin_unlock_irqrestore(&dev->lock, flags);
670 isdn_info_update();
671 break;
672 case ISDN_STAT_DISCH:
673 spin_lock_irqsave(&dev->lock, flags);
674 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
675 if ((dev->drvmap[i] == di) &&
676 (dev->chanmap[i] == c->arg)) {
677 if (c->parm.num[0])
678 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
679 else
680 if (USG_NONE(dev->usage[i])) {
681 dev->usage[i] |= ISDN_USAGE_DISABLED;
682 }
683 else
684 retval = -1;
685 break;
686 }
687 spin_unlock_irqrestore(&dev->lock, flags);
688 isdn_info_update();
689 break;
690 case ISDN_STAT_UNLOAD:
691 while (dev->drv[di]->locks > 0) {
692 isdn_unlock_driver(dev->drv[di]);
693 }
694 spin_lock_irqsave(&dev->lock, flags);
695 isdn_tty_stat_callback(i, c);
696 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
697 if (dev->drvmap[i] == di) {
698 dev->drvmap[i] = -1;
699 dev->chanmap[i] = -1;
700 dev->usage[i] &= ~ISDN_USAGE_DISABLED;
701 }
702 dev->drivers--;
703 dev->channels -= dev->drv[di]->channels;
704 kfree(dev->drv[di]->rcverr);
705 kfree(dev->drv[di]->rcvcount);
706 for (i = 0; i < dev->drv[di]->channels; i++)
707 skb_queue_purge(&dev->drv[di]->rpqueue[i]);
708 kfree(dev->drv[di]->rpqueue);
709 kfree(dev->drv[di]->rcv_waitq);
710 kfree(dev->drv[di]);
711 dev->drv[di] = NULL;
712 dev->drvid[di][0] = '\0';
713 isdn_info_update();
714 set_global_features();
715 spin_unlock_irqrestore(&dev->lock, flags);
716 return 0;
717 case ISDN_STAT_L1ERR:
718 break;
719 case CAPI_PUT_MESSAGE:
720 return(isdn_capi_rec_hl_msg(&c->parm.cmsg));
721#ifdef CONFIG_ISDN_TTY_FAX
722 case ISDN_STAT_FAXIND:
723 isdn_tty_stat_callback(i, c);
724 break;
725#endif
726#ifdef CONFIG_ISDN_AUDIO
727 case ISDN_STAT_AUDIO:
728 isdn_tty_stat_callback(i, c);
729 break;
730#endif
731#ifdef CONFIG_ISDN_DIVERSION
732 case ISDN_STAT_PROT:
733 case ISDN_STAT_REDIR:
734 if (divert_if)
735 return(divert_if->stat_callback(c));
736#endif /* CONFIG_ISDN_DIVERSION */
737 default:
738 return -1;
739 }
740 return 0;
741}
742
743/*
744 * Get integer from char-pointer, set pointer to end of number
745 */
746int
747isdn_getnum(char **p)
748{
749 int v = -1;
750
751 while (*p[0] >= '0' && *p[0] <= '9')
752 v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0');
753 return v;
754}
755
756#define DLE 0x10
757
758/*
759 * isdn_readbchan() tries to get data from the read-queue.
760 * It MUST be called with interrupts off.
761 *
762 * Be aware that this is not an atomic operation when sleep != 0, even though
763 * interrupts are turned off! Well, like that we are currently only called
764 * on behalf of a read system call on raw device files (which are documented
411c9403 765 * to be dangerous and for debugging purpose only). The inode semaphore
1da177e4
LT		 766 * takes care that this is not called for the same minor device number while
767 * we are sleeping, but access is not serialized against simultaneous read()
768 * from the corresponding ttyI device. Can other ugly events, like changes
769 * of the mapping (di,ch)<->minor, happen during the sleep? --he
770 */
771int
772isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, wait_queue_head_t *sleep)
773{
774 int count;
775 int count_pull;
776 int count_put;
777 int dflag;
778 struct sk_buff *skb;
779 u_char *cp;
780
781 if (!dev->drv[di])
782 return 0;
783 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) {
784 if (sleep)
785 interruptible_sleep_on(sleep);
786 else
787 return 0;
788 }
789 if (len > dev->drv[di]->rcvcount[channel])
790 len = dev->drv[di]->rcvcount[channel];
791 cp = buf;
792 count = 0;
793 while (len) {
794 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
795 break;
796#ifdef CONFIG_ISDN_AUDIO
797 if (ISDN_AUDIO_SKB_LOCK(skb))
798 break;
799 ISDN_AUDIO_SKB_LOCK(skb) = 1;
800 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
801 char *p = skb->data;
802 unsigned long DLEmask = (1 << channel);
803
804 dflag = 0;
805 count_pull = count_put = 0;
806 while ((count_pull < skb->len) && (len > 0)) {
807 len--;
808 if (dev->drv[di]->DLEflag & DLEmask) {
809 *cp++ = DLE;
810 dev->drv[di]->DLEflag &= ~DLEmask;
811 } else {
812 *cp++ = *p;
813 if (*p == DLE) {
814 dev->drv[di]->DLEflag |= DLEmask;
815 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
816 }
817 p++;
818 count_pull++;
819 }
820 count_put++;
821 }
822 if (count_pull >= skb->len)
823 dflag = 1;
824 } else {
825#endif
826 /* No DLE's in buff, so simply copy it */
827 dflag = 1;
828 if ((count_pull = skb->len) > len) {
829 count_pull = len;
830 dflag = 0;
831 }
832 count_put = count_pull;
d626f62b 833 skb_copy_from_linear_data(skb, cp, count_put);
1da177e4
LT		 834 cp += count_put;
835 len -= count_put;
836#ifdef CONFIG_ISDN_AUDIO
837 }
838#endif
839 count += count_put;
840 if (fp) {
841 memset(fp, 0, count_put);
842 fp += count_put;
843 }
844 if (dflag) {
845 /* We got all the data in this buff.
846 * Now we can dequeue it.
847 */
848 if (fp)
849 *(fp - 1) = 0xff;
850#ifdef CONFIG_ISDN_AUDIO
851 ISDN_AUDIO_SKB_LOCK(skb) = 0;
852#endif
853 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
854 dev_kfree_skb(skb);
855 } else {
856 /* Not yet emptied this buff, so it
857 * must stay in the queue, for further calls
858 * but we pull off the data we got until now.
859 */
860 skb_pull(skb, count_pull);
861#ifdef CONFIG_ISDN_AUDIO
862 ISDN_AUDIO_SKB_LOCK(skb) = 0;
863#endif
864 }
865 dev->drv[di]->rcvcount[channel] -= count_put;
866 }
867 return count;
868}
869
33f0f88f
AC		 870/*
871 * isdn_readbchan_tty() tries to get data from the read-queue.
872 * It MUST be called with interrupts off.
873 *
874 * Be aware that this is not an atomic operation when sleep != 0, even though
875 * interrupts are turned off! Well, like that we are currently only called
876 * on behalf of a read system call on raw device files (which are documented
411c9403 877 * to be dangerous and for debugging purpose only). The inode semaphore
33f0f88f
AC		 878 * takes care that this is not called for the same minor device number while
879 * we are sleeping, but access is not serialized against simultaneous read()
880 * from the corresponding ttyI device. Can other ugly events, like changes
881 * of the mapping (di,ch)<->minor, happen during the sleep? --he
882 */
883int
884isdn_readbchan_tty(int di, int channel, struct tty_struct *tty, int cisco_hack)
885{
886 int count;
887 int count_pull;
888 int count_put;
889 int dflag;
890 struct sk_buff *skb;
891 char last = 0;
892 int len;
893
894 if (!dev->drv[di])
895 return 0;
896 if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
897 return 0;
898
899 len = tty_buffer_request_room(tty, dev->drv[di]->rcvcount[channel]);
900 if(len == 0)
901 return len;
902
903 count = 0;
904 while (len) {
905 if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel])))
906 break;
907#ifdef CONFIG_ISDN_AUDIO
908 if (ISDN_AUDIO_SKB_LOCK(skb))
909 break;
910 ISDN_AUDIO_SKB_LOCK(skb) = 1;
911 if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) {
912 char *p = skb->data;
913 unsigned long DLEmask = (1 << channel);
914
915 dflag = 0;
916 count_pull = count_put = 0;
917 while ((count_pull < skb->len) && (len > 0)) {
7fde4d77
MG		 918 /* push every character but the last to the tty buffer directly */
919 if ( count_put )
920 tty_insert_flip_char(tty, last, TTY_NORMAL);
33f0f88f
AC		 921 len--;
922 if (dev->drv[di]->DLEflag & DLEmask) {
923 last = DLE;
924 dev->drv[di]->DLEflag &= ~DLEmask;
925 } else {
926 last = *p;
927 if (last == DLE) {
928 dev->drv[di]->DLEflag |= DLEmask;
929 (ISDN_AUDIO_SKB_DLECOUNT(skb))--;
930 }
931 p++;
932 count_pull++;
933 }
934 count_put++;
935 }
936 if (count_pull >= skb->len)
937 dflag = 1;
938 } else {
939#endif
940 /* No DLE's in buff, so simply copy it */
941 dflag = 1;
942 if ((count_pull = skb->len) > len) {
943 count_pull = len;
944 dflag = 0;
945 }
946 count_put = count_pull;
947 if(count_put > 1)
948 tty_insert_flip_string(tty, skb->data, count_put - 1);
916d1544 949 last = skb->data[count_put - 1];
33f0f88f
AC		 950 len -= count_put;
951#ifdef CONFIG_ISDN_AUDIO
952 }
953#endif
954 count += count_put;
955 if (dflag) {
956 /* We got all the data in this buff.
957 * Now we can dequeue it.
958 */
959 if(cisco_hack)
960 tty_insert_flip_char(tty, last, 0xFF);
961 else
962 tty_insert_flip_char(tty, last, TTY_NORMAL);
963#ifdef CONFIG_ISDN_AUDIO
964 ISDN_AUDIO_SKB_LOCK(skb) = 0;
965#endif
966 skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]);
967 dev_kfree_skb(skb);
968 } else {
969 tty_insert_flip_char(tty, last, TTY_NORMAL);
970 /* Not yet emptied this buff, so it
971 * must stay in the queue, for further calls
972 * but we pull off the data we got until now.
973 */
974 skb_pull(skb, count_pull);
975#ifdef CONFIG_ISDN_AUDIO
976 ISDN_AUDIO_SKB_LOCK(skb) = 0;
977#endif
978 }
979 dev->drv[di]->rcvcount[channel] -= count_put;
980 }
981 return count;
982}
983
984
d4f77514 985static inline int
1da177e4
LT		 986isdn_minor2drv(int minor)
987{
988 return (dev->drvmap[minor]);
989}
990
d4f77514 991static inline int
1da177e4
LT		 992isdn_minor2chan(int minor)
993{
994 return (dev->chanmap[minor]);
995}
996
997static char *
998isdn_statstr(void)
999{
1000 static char istatbuf[2048];
1001 char *p;
1002 int i;
1003
1004 sprintf(istatbuf, "idmap:\t");
1005 p = istatbuf + strlen(istatbuf);
1006 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1007 sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]);
1008 p = istatbuf + strlen(istatbuf);
1009 }
1010 sprintf(p, "\nchmap:\t");
1011 p = istatbuf + strlen(istatbuf);
1012 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1013 sprintf(p, "%d ", dev->chanmap[i]);
1014 p = istatbuf + strlen(istatbuf);
1015 }
1016 sprintf(p, "\ndrmap:\t");
1017 p = istatbuf + strlen(istatbuf);
1018 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1019 sprintf(p, "%d ", dev->drvmap[i]);
1020 p = istatbuf + strlen(istatbuf);
1021 }
1022 sprintf(p, "\nusage:\t");
1023 p = istatbuf + strlen(istatbuf);
1024 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1025 sprintf(p, "%d ", dev->usage[i]);
1026 p = istatbuf + strlen(istatbuf);
1027 }
1028 sprintf(p, "\nflags:\t");
1029 p = istatbuf + strlen(istatbuf);
1030 for (i = 0; i < ISDN_MAX_DRIVERS; i++) {
1031 if (dev->drv[i]) {
1032 sprintf(p, "%ld ", dev->drv[i]->online);
1033 p = istatbuf + strlen(istatbuf);
1034 } else {
1035 sprintf(p, "? ");
1036 p = istatbuf + strlen(istatbuf);
1037 }
1038 }
1039 sprintf(p, "\nphone:\t");
1040 p = istatbuf + strlen(istatbuf);
1041 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1042 sprintf(p, "%s ", dev->num[i]);
1043 p = istatbuf + strlen(istatbuf);
1044 }
1045 sprintf(p, "\n");
1046 return istatbuf;
1047}
1048
1049/* Module interface-code */
1050
1051void
1052isdn_info_update(void)
1053{
1054 infostruct *p = dev->infochain;
1055
1056 while (p) {
1057 *(p->private) = 1;
1058 p = (infostruct *) p->next;
1059 }
1060 wake_up_interruptible(&(dev->info_waitq));
1061}
1062
1063static ssize_t
1064isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
1065{
4482dfad 1066 uint minor = iminor(file->f_path.dentry->d_inode);
1da177e4
LT		 1067 int len = 0;
1068 int drvidx;
1069 int chidx;
1070 int retval;
1071 char *p;
1072
1073 lock_kernel();
1074 if (minor == ISDN_MINOR_STATUS) {
1075 if (!file->private_data) {
1076 if (file->f_flags & O_NONBLOCK) {
1077 retval = -EAGAIN;
1078 goto out;
1079 }
1080 interruptible_sleep_on(&(dev->info_waitq));
1081 }
1082 p = isdn_statstr();
1083 file->private_data = NULL;
1084 if ((len = strlen(p)) <= count) {
1085 if (copy_to_user(buf, p, len)) {
1086 retval = -EFAULT;
1087 goto out;
1088 }
1089 *off += len;
1090 retval = len;
1091 goto out;
1092 }
1093 retval = 0;
1094 goto out;
1095 }
1096 if (!dev->drivers) {
1097 retval = -ENODEV;
1098 goto out;
1099 }
1100 if (minor <= ISDN_MINOR_BMAX) {
1101 printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor);
1102 drvidx = isdn_minor2drv(minor);
1103 if (drvidx < 0) {
1104 retval = -ENODEV;
1105 goto out;
1106 }
1107 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1108 retval = -ENODEV;
1109 goto out;
1110 }
1111 chidx = isdn_minor2chan(minor);
1112 if (!(p = kmalloc(count, GFP_KERNEL))) {
1113 retval = -ENOMEM;
1114 goto out;
1115 }
1116 len = isdn_readbchan(drvidx, chidx, p, NULL, count,
1117 &dev->drv[drvidx]->rcv_waitq[chidx]);
1118 *off += len;
1119 if (copy_to_user(buf,p,len))
1120 len = -EFAULT;
1121 kfree(p);
1122 retval = len;
1123 goto out;
1124 }
1125 if (minor <= ISDN_MINOR_CTRLMAX) {
1126 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1127 if (drvidx < 0) {
1128 retval = -ENODEV;
1129 goto out;
1130 }
1131 if (!dev->drv[drvidx]->stavail) {
1132 if (file->f_flags & O_NONBLOCK) {
1133 retval = -EAGAIN;
1134 goto out;
1135 }
1136 interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq));
1137 }
1138 if (dev->drv[drvidx]->interface->readstat) {
1139 if (count > dev->drv[drvidx]->stavail)
1140 count = dev->drv[drvidx]->stavail;
04518bfe 1141 len = dev->drv[drvidx]->interface->readstat(buf, count,
d39d5ed9 1142 drvidx, isdn_minor2chan(minor - ISDN_MINOR_CTRL));
04518bfe
JG		 1143 if (len < 0) {
1144 retval = len;
1145 goto out;
1146 }
1da177e4
LT		 1147 } else {
1148 len = 0;
1149 }
1150 if (len)
1151 dev->drv[drvidx]->stavail -= len;
1152 else
1153 dev->drv[drvidx]->stavail = 0;
1154 *off += len;
1155 retval = len;
1156 goto out;
1157 }
1158#ifdef CONFIG_ISDN_PPP
1159 if (minor <= ISDN_MINOR_PPPMAX) {
1160 retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count);
1161 goto out;
1162 }
1163#endif
1164 retval = -ENODEV;
1165 out:
1166 unlock_kernel();
1167 return retval;
1168}
1169
1170static ssize_t
1171isdn_write(struct file *file, const char __user *buf, size_t count, loff_t * off)
1172{
4482dfad 1173 uint minor = iminor(file->f_path.dentry->d_inode);
1da177e4
LT		 1174 int drvidx;
1175 int chidx;
1176 int retval;
1177
1178 if (minor == ISDN_MINOR_STATUS)
1179 return -EPERM;
1180 if (!dev->drivers)
1181 return -ENODEV;
1182
1183 lock_kernel();
1184 if (minor <= ISDN_MINOR_BMAX) {
1185 printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor);
1186 drvidx = isdn_minor2drv(minor);
1187 if (drvidx < 0) {
1188 retval = -ENODEV;
1189 goto out;
1190 }
1191 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) {
1192 retval = -ENODEV;
1193 goto out;
1194 }
1195 chidx = isdn_minor2chan(minor);
d20d04bc 1196 while ((retval = isdn_writebuf_stub(drvidx, chidx, buf, count)) == 0)
1da177e4 1197 interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]);
1da177e4
LT		 1198 goto out;
1199 }
1200 if (minor <= ISDN_MINOR_CTRLMAX) {
1201 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1202 if (drvidx < 0) {
1203 retval = -ENODEV;
1204 goto out;
1205 }
1206 /*
1207 * We want to use the isdnctrl device to load the firmware
1208 *
1209 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1210 return -ENODEV;
1211 */
1212 if (dev->drv[drvidx]->interface->writecmd)
1213 retval = dev->drv[drvidx]->interface->
d39d5ed9
KK		 1214 writecmd(buf, count, drvidx,
1215 isdn_minor2chan(minor - ISDN_MINOR_CTRL));
1da177e4
LT		 1216 else
1217 retval = count;
1218 goto out;
1219 }
1220#ifdef CONFIG_ISDN_PPP
1221 if (minor <= ISDN_MINOR_PPPMAX) {
1222 retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count);
1223 goto out;
1224 }
1225#endif
1226 retval = -ENODEV;
1227 out:
1228 unlock_kernel();
1229 return retval;
1230}
1231
1232static unsigned int
1233isdn_poll(struct file *file, poll_table * wait)
1234{
1235 unsigned int mask = 0;
4482dfad 1236 unsigned int minor = iminor(file->f_path.dentry->d_inode);
1da177e4
LT		 1237 int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1238
1239 lock_kernel();
1240 if (minor == ISDN_MINOR_STATUS) {
1241 poll_wait(file, &(dev->info_waitq), wait);
1242 /* mask = POLLOUT | POLLWRNORM; */
1243 if (file->private_data) {
1244 mask |= POLLIN | POLLRDNORM;
1245 }
1246 goto out;
1247 }
1248 if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) {
1249 if (drvidx < 0) {
1250 /* driver deregistered while file open */
1251 mask = POLLHUP;
1252 goto out;
1253 }
1254 poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait);
1255 mask = POLLOUT | POLLWRNORM;
1256 if (dev->drv[drvidx]->stavail) {
1257 mask |= POLLIN | POLLRDNORM;
1258 }
1259 goto out;
1260 }
1261#ifdef CONFIG_ISDN_PPP
1262 if (minor <= ISDN_MINOR_PPPMAX) {
1263 mask = isdn_ppp_poll(file, wait);
1264 goto out;
1265 }
1266#endif
1267 mask = POLLERR;
1268 out:
1269 unlock_kernel();
1270 return mask;
1271}
1272
1273
1274static int
1275isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
1276{
cd6b3956 1277 uint minor = iminor(inode);
1da177e4
LT		 1278 isdn_ctrl c;
1279 int drvidx;
1280 int chidx;
1281 int ret;
1282 int i;
1283 char __user *p;
1284 char *s;
1285 union iocpar {
1286 char name[10];
1287 char bname[22];
1288 isdn_ioctl_struct iocts;
1289 isdn_net_ioctl_phone phone;
1290 isdn_net_ioctl_cfg cfg;
1291 } iocpar;
1292 void __user *argp = (void __user *)arg;
1293
1294#define name iocpar.name
1295#define bname iocpar.bname
1296#define iocts iocpar.iocts
1297#define phone iocpar.phone
1298#define cfg iocpar.cfg
1299
1300 if (minor == ISDN_MINOR_STATUS) {
1301 switch (cmd) {
1302 case IIOCGETDVR:
1303 return (TTY_DV +
1304 (NET_DV << 8) +
1305 (INF_DV << 16));
1306 case IIOCGETCPS:
1307 if (arg) {
1308 ulong __user *p = argp;
1309 int i;
1310 if (!access_ok(VERIFY_WRITE, p,
1311 sizeof(ulong) * ISDN_MAX_CHANNELS * 2))
1312 return -EFAULT;
1313 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1314 put_user(dev->ibytes[i], p++);
1315 put_user(dev->obytes[i], p++);
1316 }
1317 return 0;
1318 } else
1319 return -EINVAL;
1320 break;
1321#ifdef CONFIG_NETDEVICES
1322 case IIOCNETGPN:
1323 /* Get peer phone number of a connected
1324 * isdn network interface */
1325 if (arg) {
1326 if (copy_from_user(&phone, argp, sizeof(phone)))
1327 return -EFAULT;
1328 return isdn_net_getpeer(&phone, argp);
1329 } else
1330 return -EINVAL;
1331#endif
1332 default:
1333 return -EINVAL;
1334 }
1335 }
1336 if (!dev->drivers)
1337 return -ENODEV;
1338 if (minor <= ISDN_MINOR_BMAX) {
1339 drvidx = isdn_minor2drv(minor);
1340 if (drvidx < 0)
1341 return -ENODEV;
1342 chidx = isdn_minor2chan(minor);
1343 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1344 return -ENODEV;
1345 return 0;
1346 }
1347 if (minor <= ISDN_MINOR_CTRLMAX) {
1348/*
1349 * isdn net devices manage lots of configuration variables as linked lists.
1350 * Those lists must only be manipulated from user space. Some of the ioctl's
3ad2f3fb 1351 * service routines access user space and are not atomic. Therefore, ioctl's
1da177e4
LT		 1352 * manipulating the lists and ioctl's sleeping while accessing the lists
1353 * are serialized by means of a semaphore.
1354 */
1355 switch (cmd) {
1356 case IIOCNETDWRSET:
1357 printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n");
1358 return(-EINVAL);
1359 case IIOCNETLCR:
1360 printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n");
1361 return -ENODEV;
1362#ifdef CONFIG_NETDEVICES
1363 case IIOCNETAIF:
1364 /* Add a network-interface */
1365 if (arg) {
1366 if (copy_from_user(name, argp, sizeof(name)))
1367 return -EFAULT;
1368 s = name;
1369 } else {
1370 s = NULL;
1371 }
4e3dfaca 1372 ret = mutex_lock_interruptible(&dev->mtx);
1da177e4
LT		 1373 if( ret ) return ret;
1374 if ((s = isdn_net_new(s, NULL))) {
1375 if (copy_to_user(argp, s, strlen(s) + 1)){
1376 ret = -EFAULT;
1377 } else {
1378 ret = 0;
1379 }
1380 } else
1381 ret = -ENODEV;
4e3dfaca 1382 mutex_unlock(&dev->mtx);
1da177e4
LT		 1383 return ret;
1384 case IIOCNETASL:
1385 /* Add a slave to a network-interface */
1386 if (arg) {
1387 if (copy_from_user(bname, argp, sizeof(bname) - 1))
1388 return -EFAULT;
1389 } else
1390 return -EINVAL;
4e3dfaca 1391 ret = mutex_lock_interruptible(&dev->mtx);
1da177e4
LT		 1392 if( ret ) return ret;
1393 if ((s = isdn_net_newslave(bname))) {
1394 if (copy_to_user(argp, s, strlen(s) + 1)){
1395 ret = -EFAULT;
1396 } else {
1397 ret = 0;
1398 }
1399 } else
1400 ret = -ENODEV;
4e3dfaca 1401 mutex_unlock(&dev->mtx);
1da177e4
LT		 1402 return ret;
1403 case IIOCNETDIF:
1404 /* Delete a network-interface */
1405 if (arg) {
1406 if (copy_from_user(name, argp, sizeof(name)))
1407 return -EFAULT;
4e3dfaca 1408 ret = mutex_lock_interruptible(&dev->mtx);
1da177e4
LT		 1409 if( ret ) return ret;
1410 ret = isdn_net_rm(name);
4e3dfaca 1411 mutex_unlock(&dev->mtx);
1da177e4
LT		 1412 return ret;
1413 } else
1414 return -EINVAL;
1415 case IIOCNETSCF:
1416 /* Set configurable parameters of a network-interface */
1417 if (arg) {
1418 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1419 return -EFAULT;
1420 return isdn_net_setcfg(&cfg);
1421 } else
1422 return -EINVAL;
1423 case IIOCNETGCF:
1424 /* Get configurable parameters of a network-interface */
1425 if (arg) {
1426 if (copy_from_user(&cfg, argp, sizeof(cfg)))
1427 return -EFAULT;
1428 if (!(ret = isdn_net_getcfg(&cfg))) {
1429 if (copy_to_user(argp, &cfg, sizeof(cfg)))
1430 return -EFAULT;
1431 }
1432 return ret;
1433 } else
1434 return -EINVAL;
1435 case IIOCNETANM:
1436 /* Add a phone-number to a network-interface */
1437 if (arg) {
1438 if (copy_from_user(&phone, argp, sizeof(phone)))
1439 return -EFAULT;
4e3dfaca 1440 ret = mutex_lock_interruptible(&dev->mtx);
1da177e4
LT		 1441 if( ret ) return ret;
1442 ret = isdn_net_addphone(&phone);
4e3dfaca 1443 mutex_unlock(&dev->mtx);
1da177e4
LT		 1444 return ret;
1445 } else
1446 return -EINVAL;
1447 case IIOCNETGNM:
1448 /* Get list of phone-numbers of a network-interface */
1449 if (arg) {
1450 if (copy_from_user(&phone, argp, sizeof(phone)))
1451 return -EFAULT;
4e3dfaca 1452 ret = mutex_lock_interruptible(&dev->mtx);
1da177e4
LT		 1453 if( ret ) return ret;
1454 ret = isdn_net_getphones(&phone, argp);
4e3dfaca 1455 mutex_unlock(&dev->mtx);
1da177e4
LT		 1456 return ret;
1457 } else
1458 return -EINVAL;
1459 case IIOCNETDNM:
1460 /* Delete a phone-number of a network-interface */
1461 if (arg) {
1462 if (copy_from_user(&phone, argp, sizeof(phone)))
1463 return -EFAULT;
4e3dfaca 1464 ret = mutex_lock_interruptible(&dev->mtx);
1da177e4
LT		 1465 if( ret ) return ret;
1466 ret = isdn_net_delphone(&phone);
4e3dfaca 1467 mutex_unlock(&dev->mtx);
1da177e4
LT		 1468 return ret;
1469 } else
1470 return -EINVAL;
1471 case IIOCNETDIL:
1472 /* Force dialing of a network-interface */
1473 if (arg) {
1474 if (copy_from_user(name, argp, sizeof(name)))
1475 return -EFAULT;
1476 return isdn_net_force_dial(name);
1477 } else
1478 return -EINVAL;
1479#ifdef CONFIG_ISDN_PPP
1480 case IIOCNETALN:
1481 if (!arg)
1482 return -EINVAL;
1483 if (copy_from_user(name, argp, sizeof(name)))
1484 return -EFAULT;
1485 return isdn_ppp_dial_slave(name);
1486 case IIOCNETDLN:
1487 if (!arg)
1488 return -EINVAL;
1489 if (copy_from_user(name, argp, sizeof(name)))
1490 return -EFAULT;
1491 return isdn_ppp_hangup_slave(name);
1492#endif
1493 case IIOCNETHUP:
1494 /* Force hangup of a network-interface */
1495 if (!arg)
1496 return -EINVAL;
1497 if (copy_from_user(name, argp, sizeof(name)))
1498 return -EFAULT;
1499 return isdn_net_force_hangup(name);
1500 break;
1501#endif /* CONFIG_NETDEVICES */
1502 case IIOCSETVER:
1503 dev->net_verbose = arg;
1504 printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose);
1505 return 0;
1506 case IIOCSETGST:
1507 if (arg)
1508 dev->global_flags |= ISDN_GLOBAL_STOPPED;
1509 else
1510 dev->global_flags &= ~ISDN_GLOBAL_STOPPED;
1511 printk(KERN_INFO "isdn: Global Mode %s\n",
1512 (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running");
1513 return 0;
1514 case IIOCSETBRJ:
1515 drvidx = -1;
1516 if (arg) {
1517 int i;
1518 char *p;
1519 if (copy_from_user(&iocts, argp,
1520 sizeof(isdn_ioctl_struct)))
1521 return -EFAULT;
eafe1aa3 1522 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1da177e4
LT		 1523 if (strlen(iocts.drvid)) {
1524 if ((p = strchr(iocts.drvid, ',')))
1525 *p = 0;
1526 drvidx = -1;
1527 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1528 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1529 drvidx = i;
1530 break;
1531 }
1532 }
1533 }
1534 if (drvidx == -1)
1535 return -ENODEV;
1536 if (iocts.arg)
1537 dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS;
1538 else
1539 dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS;
1540 return 0;
1541 case IIOCSIGPRF:
1542 dev->profd = current;
1543 return 0;
1544 break;
1545 case IIOCGETPRF:
1546 /* Get all Modem-Profiles */
1547 if (arg) {
1548 char __user *p = argp;
1549 int i;
1550
1551 if (!access_ok(VERIFY_WRITE, argp,
1552 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1553 * ISDN_MAX_CHANNELS))
1554 return -EFAULT;
1555
1556 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1557 if (copy_to_user(p, dev->mdm.info[i].emu.profile,
1558 ISDN_MODEM_NUMREG))
1559 return -EFAULT;
1560 p += ISDN_MODEM_NUMREG;
1561 if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN))
1562 return -EFAULT;
1563 p += ISDN_MSNLEN;
1564 if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN))
1565 return -EFAULT;
1566 p += ISDN_LMSNLEN;
1567 }
1568 return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS;
1569 } else
1570 return -EINVAL;
1571 break;
1572 case IIOCSETPRF:
1573 /* Set all Modem-Profiles */
1574 if (arg) {
1575 char __user *p = argp;
1576 int i;
1577
1578 if (!access_ok(VERIFY_READ, argp,
1579 (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN)
1580 * ISDN_MAX_CHANNELS))
1581 return -EFAULT;
1582
1583 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
1584 if (copy_from_user(dev->mdm.info[i].emu.profile, p,
1585 ISDN_MODEM_NUMREG))
1586 return -EFAULT;
1587 p += ISDN_MODEM_NUMREG;
1588 if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN))
1589 return -EFAULT;
1590 p += ISDN_LMSNLEN;
1591 if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN))
1592 return -EFAULT;
1593 p += ISDN_MSNLEN;
1594 }
1595 return 0;
1596 } else
1597 return -EINVAL;
1598 break;
1599 case IIOCSETMAP:
1600 case IIOCGETMAP:
1601 /* Set/Get MSN->EAZ-Mapping for a driver */
1602 if (arg) {
1603
1604 if (copy_from_user(&iocts, argp,
1605 sizeof(isdn_ioctl_struct)))
1606 return -EFAULT;
eafe1aa3 1607 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1da177e4
LT		 1608 if (strlen(iocts.drvid)) {
1609 drvidx = -1;
1610 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1611 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1612 drvidx = i;
1613 break;
1614 }
1615 } else
1616 drvidx = 0;
1617 if (drvidx == -1)
1618 return -ENODEV;
1619 if (cmd == IIOCSETMAP) {
1620 int loop = 1;
1621
1622 p = (char __user *) iocts.arg;
1623 i = 0;
1624 while (loop) {
1625 int j = 0;
1626
1627 while (1) {
1628 if (!access_ok(VERIFY_READ, p, 1))
1629 return -EFAULT;
1630 get_user(bname[j], p++);
1631 switch (bname[j]) {
1632 case '\0':
1633 loop = 0;
1634 /* Fall through */
1635 case ',':
1636 bname[j] = '\0';
1637 strcpy(dev->drv[drvidx]->msn2eaz[i], bname);
1638 j = ISDN_MSNLEN;
1639 break;
1640 default:
1641 j++;
1642 }
1643 if (j >= ISDN_MSNLEN)
1644 break;
1645 }
1646 if (++i > 9)
1647 break;
1648 }
1649 } else {
1650 p = (char __user *) iocts.arg;
1651 for (i = 0; i < 10; i++) {
eafe1aa3 1652 snprintf(bname, sizeof(bname), "%s%s",
1da177e4
LT		 1653 strlen(dev->drv[drvidx]->msn2eaz[i]) ?
1654 dev->drv[drvidx]->msn2eaz[i] : "_",
1655 (i < 9) ? "," : "\0");
1656 if (copy_to_user(p, bname, strlen(bname) + 1))
1657 return -EFAULT;
1658 p += strlen(bname);
1659 }
1660 }
1661 return 0;
1662 } else
1663 return -EINVAL;
1664 case IIOCDBGVAR:
1665 if (arg) {
1666 if (copy_to_user(argp, &dev, sizeof(ulong)))
1667 return -EFAULT;
1668 return 0;
1669 } else
1670 return -EINVAL;
1671 break;
1672 default:
1673 if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
1674 cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;
1675 else
1676 return -EINVAL;
1677 if (arg) {
1678 int i;
1679 char *p;
1680 if (copy_from_user(&iocts, argp, sizeof(isdn_ioctl_struct)))
1681 return -EFAULT;
eafe1aa3 1682 iocts.drvid[sizeof(iocts.drvid)-1] = 0;
1da177e4
LT		 1683 if (strlen(iocts.drvid)) {
1684 if ((p = strchr(iocts.drvid, ',')))
1685 *p = 0;
1686 drvidx = -1;
1687 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
1688 if (!(strcmp(dev->drvid[i], iocts.drvid))) {
1689 drvidx = i;
1690 break;
1691 }
1692 } else
1693 drvidx = 0;
1694 if (drvidx == -1)
1695 return -ENODEV;
1696 if (!access_ok(VERIFY_WRITE, argp,
1697 sizeof(isdn_ioctl_struct)))
1698 return -EFAULT;
1699 c.driver = drvidx;
1700 c.command = ISDN_CMD_IOCTL;
1701 c.arg = cmd;
1702 memcpy(c.parm.num, &iocts.arg, sizeof(ulong));
1703 ret = isdn_command(&c);
1704 memcpy(&iocts.arg, c.parm.num, sizeof(ulong));
1705 if (copy_to_user(argp, &iocts, sizeof(isdn_ioctl_struct)))
1706 return -EFAULT;
1707 return ret;
1708 } else
1709 return -EINVAL;
1710 }
1711 }
1712#ifdef CONFIG_ISDN_PPP
1713 if (minor <= ISDN_MINOR_PPPMAX)
1714 return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg));
1715#endif
1716 return -ENODEV;
1717
1718#undef name
1719#undef bname
1720#undef iocts
1721#undef phone
1722#undef cfg
1723}
1724
1725/*
1726 * Open the device code.
1727 */
1728static int
1729isdn_open(struct inode *ino, struct file *filep)
1730{
cd6b3956 1731 uint minor = iminor(ino);
1da177e4
LT		 1732 int drvidx;
1733 int chidx;
1734 int retval = -ENODEV;
1735
1bcaa0bd 1736 lock_kernel();
1da177e4
LT		 1737 if (minor == ISDN_MINOR_STATUS) {
1738 infostruct *p;
1739
1740 if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) {
1741 p->next = (char *) dev->infochain;
1742 p->private = (char *) &(filep->private_data);
1743 dev->infochain = p;
1744 /* At opening we allow a single update */
1745 filep->private_data = (char *) 1;
1746 retval = 0;
1747 goto out;
1748 } else {
1749 retval = -ENOMEM;
1750 goto out;
1751 }
1752 }
1753 if (!dev->channels)
1754 goto out;
1755 if (minor <= ISDN_MINOR_BMAX) {
1756 printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor);
1757 drvidx = isdn_minor2drv(minor);
1758 if (drvidx < 0)
1759 goto out;
1760 chidx = isdn_minor2chan(minor);
1761 if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING))
1762 goto out;
1763 if (!(dev->drv[drvidx]->online & (1 << chidx)))
1764 goto out;
1765 isdn_lock_drivers();
1766 retval = 0;
1767 goto out;
1768 }
1769 if (minor <= ISDN_MINOR_CTRLMAX) {
1770 drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL);
1771 if (drvidx < 0)
1772 goto out;
1773 isdn_lock_drivers();
1774 retval = 0;
1775 goto out;
1776 }
1777#ifdef CONFIG_ISDN_PPP
1778 if (minor <= ISDN_MINOR_PPPMAX) {
1779 retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep);
1780 if (retval == 0)
1781 isdn_lock_drivers();
1782 goto out;
1783 }
1784#endif
1785 out:
1786 nonseekable_open(ino, filep);
1bcaa0bd 1787 unlock_kernel();
1da177e4
LT		 1788 return retval;
1789}
1790
1791static int
1792isdn_close(struct inode *ino, struct file *filep)
1793{
cd6b3956 1794 uint minor = iminor(ino);
1da177e4
LT		 1795
1796 lock_kernel();
1797 if (minor == ISDN_MINOR_STATUS) {
1798 infostruct *p = dev->infochain;
1799 infostruct *q = NULL;
1800
1801 while (p) {
1802 if (p->private == (char *) &(filep->private_data)) {
1803 if (q)
1804 q->next = p->next;
1805 else
1806 dev->infochain = (infostruct *) (p->next);
1807 kfree(p);
1808 goto out;
1809 }
1810 q = p;
1811 p = (infostruct *) (p->next);
1812 }
1813 printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n");
1814 goto out;
1815 }
1816 isdn_unlock_drivers();
1817 if (minor <= ISDN_MINOR_BMAX)
1818 goto out;
1819 if (minor <= ISDN_MINOR_CTRLMAX) {
1820 if (dev->profd == current)
1821 dev->profd = NULL;
1822 goto out;
1823 }
1824#ifdef CONFIG_ISDN_PPP
1825 if (minor <= ISDN_MINOR_PPPMAX)
1826 isdn_ppp_release(minor - ISDN_MINOR_PPP, filep);
1827#endif
1828
1829 out:
1830 unlock_kernel();
1831 return 0;
1832}
1833
2b8693c0 1834static const struct file_operations isdn_fops =
1da177e4
LT		 1835{
1836 .owner = THIS_MODULE,
1837 .llseek = no_llseek,
1838 .read = isdn_read,
1839 .write = isdn_write,
1840 .poll = isdn_poll,
1841 .ioctl = isdn_ioctl,
1842 .open = isdn_open,
1843 .release = isdn_close,
1844};
1845
1846char *
1847isdn_map_eaz2msn(char *msn, int di)
1848{
1849 isdn_driver_t *this = dev->drv[di];
1850 int i;
1851
1852 if (strlen(msn) == 1) {
1853 i = msn[0] - '0';
1854 if ((i >= 0) && (i <= 9))
1855 if (strlen(this->msn2eaz[i]))
1856 return (this->msn2eaz[i]);
1857 }
1858 return (msn);
1859}
1860
1861/*
1862 * Find an unused ISDN-channel, whose feature-flags match the
1863 * given L2- and L3-protocols.
1864 */
1865#define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038))
1866
1867/*
1868 * This function must be called with holding the dev->lock.
1869 */
1870int
1871isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev
1872 ,int pre_chan, char *msn)
1873{
1874 int i;
1875 ulong features;
1876 ulong vfeatures;
1877
1878 features = ((1 << l2_proto) | (0x10000 << l3_proto));
1879 vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) &
1880 ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038));
1881 /* If Layer-2 protocol is V.110, accept drivers with
1882 * transparent feature even if these don't support V.110
1883 * because we can emulate this in linklevel.
1884 */
1885 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1886 if (USG_NONE(dev->usage[i]) &&
1887 (dev->drvmap[i] != -1)) {
1888 int d = dev->drvmap[i];
1889 if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) &&
1890 ((pre_dev != d) || (pre_chan != dev->chanmap[i])))
1891 continue;
1892 if (!strcmp(isdn_map_eaz2msn(msn, d), "-"))
1893 continue;
1894 if (dev->usage[i] & ISDN_USAGE_DISABLED)
1895 continue; /* usage not allowed */
1896 if (dev->drv[d]->flags & DRV_FLAG_RUNNING) {
1897 if (((dev->drv[d]->interface->features & features) == features) ||
1898 (((dev->drv[d]->interface->features & vfeatures) == vfeatures) &&
1899 (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) {
1900 if ((pre_dev < 0) || (pre_chan < 0)) {
1901 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1902 dev->usage[i] |= usage;
1903 isdn_info_update();
1904 return i;
1905 } else {
1906 if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) {
1907 dev->usage[i] &= ISDN_USAGE_EXCLUSIVE;
1908 dev->usage[i] |= usage;
1909 isdn_info_update();
1910 return i;
1911 }
1912 }
1913 }
1914 }
1915 }
1916 return -1;
1917}
1918
1919/*
1920 * Set state of ISDN-channel to 'unused'
1921 */
1922void
1923isdn_free_channel(int di, int ch, int usage)
1924{
1925 int i;
1926
09fca29d
KK		 1927 if ((di < 0) || (ch < 0)) {
1928 printk(KERN_WARNING "%s: called with invalid drv(%d) or channel(%d)\n",
156f1ed6 1929 __func__, di, ch);
09fca29d
KK		 1930 return;
1931 }
1da177e4
LT		 1932 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1933 if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) &&
1934 (dev->drvmap[i] == di) &&
1935 (dev->chanmap[i] == ch)) {
1936 dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE);
1937 strcpy(dev->num[i], "???");
1938 dev->ibytes[i] = 0;
1939 dev->obytes[i] = 0;
1940// 20.10.99 JIM, try to reinitialize v110 !
1941 dev->v110emu[i] = 0;
1942 atomic_set(&(dev->v110use[i]), 0);
1943 isdn_v110_close(dev->v110[i]);
1944 dev->v110[i] = NULL;
1945// 20.10.99 JIM, try to reinitialize v110 !
1946 isdn_info_update();
09fca29d
KK		 1947 if (dev->drv[di])
1948 skb_queue_purge(&dev->drv[di]->rpqueue[ch]);
1da177e4
LT		 1949 }
1950}
1951
1952/*
1953 * Cancel Exclusive-Flag for ISDN-channel
1954 */
1955void
1956isdn_unexclusive_channel(int di, int ch)
1957{
1958 int i;
1959
1960 for (i = 0; i < ISDN_MAX_CHANNELS; i++)
1961 if ((dev->drvmap[i] == di) &&
1962 (dev->chanmap[i] == ch)) {
1963 dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE;
1964 isdn_info_update();
1965 return;
1966 }
1967}
1968
1969/*
1970 * writebuf replacement for SKB_ABLE drivers
1971 */
1972static int
1973isdn_writebuf_stub(int drvidx, int chan, const u_char __user * buf, int len)
1974{
1975 int ret;
1976 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
1977 struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC);
1978
1979 if (!skb)
d20d04bc 1980 return -ENOMEM;
1da177e4 1981 skb_reserve(skb, hl);
4fc89e39
DJ		 1982 if (copy_from_user(skb_put(skb, len), buf, len)) {
1983 dev_kfree_skb(skb);
d20d04bc 1984 return -EFAULT;
4fc89e39 1985 }
1da177e4
LT		 1986 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb);
1987 if (ret <= 0)
1988 dev_kfree_skb(skb);
1989 if (ret > 0)
1990 dev->obytes[isdn_dc2minor(drvidx, chan)] += ret;
1991 return ret;
1992}
1993
1994/*
1995 * Return: length of data on success, -ERRcode on failure.
1996 */
1997int
1998isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb)
1999{
2000 int ret;
2001 struct sk_buff *nskb = NULL;
2002 int v110_ret = skb->len;
2003 int idx = isdn_dc2minor(drvidx, chan);
2004
2005 if (dev->v110[idx]) {
2006 atomic_inc(&dev->v110use[idx]);
2007 nskb = isdn_v110_encode(dev->v110[idx], skb);
2008 atomic_dec(&dev->v110use[idx]);
2009 if (!nskb)
2010 return 0;
2011 v110_ret = *((int *)nskb->data);
2012 skb_pull(nskb, sizeof(int));
2013 if (!nskb->len) {
2014 dev_kfree_skb(nskb);
2015 return v110_ret;
2016 }
2017 /* V.110 must always be acknowledged */
2018 ack = 1;
2019 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb);
2020 } else {
2021 int hl = dev->drv[drvidx]->interface->hl_hdrlen;
2022
2023 if( skb_headroom(skb) < hl ){
2024 /*
2025 * This should only occur when new HL driver with
2026 * increased hl_hdrlen was loaded after netdevice
2027 * was created and connected to the new driver.
2028 *
2029 * The V.110 branch (re-allocates on its own) does
2030 * not need this
2031 */
2032 struct sk_buff * skb_tmp;
2033
2034 skb_tmp = skb_realloc_headroom(skb, hl);
2035 printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed");
2036 if (!skb_tmp) return -ENOMEM; /* 0 better? */
2037 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp);
2038 if( ret > 0 ){
2039 dev_kfree_skb(skb);
2040 } else {
2041 dev_kfree_skb(skb_tmp);
2042 }
2043 } else {
2044 ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb);
2045 }
2046 }
2047 if (ret > 0) {
2048 dev->obytes[idx] += ret;
2049 if (dev->v110[idx]) {
2050 atomic_inc(&dev->v110use[idx]);
2051 dev->v110[idx]->skbuser++;
2052 atomic_dec(&dev->v110use[idx]);
2053 /* For V.110 return unencoded data length */
2054 ret = v110_ret;
2055 /* if the complete frame was send we free the skb;
2056 if not upper function will requeue the skb */
2057 if (ret == skb->len)
2058 dev_kfree_skb(skb);
2059 }
2060 } else
2061 if (dev->v110[idx])
2062 dev_kfree_skb(nskb);
2063 return ret;
2064}
2065
3e206b0a 2066static int
1da177e4
LT		 2067isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
2068{
2069 int j, k, m;
2070
2071 init_waitqueue_head(&d->st_waitq);
2072 if (d->flags & DRV_FLAG_RUNNING)
2073 return -1;
2074 if (n < 1) return 0;
2075
2076 m = (adding) ? d->channels + n : n;
2077
2078 if (dev->channels + n > ISDN_MAX_CHANNELS) {
2079 printk(KERN_WARNING "register_isdn: Max. %d channels supported\n",
2080 ISDN_MAX_CHANNELS);
2081 return -1;
2082 }
2083
2084 if ((adding) && (d->rcverr))
2085 kfree(d->rcverr);
41f96935 2086 if (!(d->rcverr = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
1da177e4
LT		 2087 printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n");
2088 return -1;
2089 }
1da177e4
LT		 2090
2091 if ((adding) && (d->rcvcount))
2092 kfree(d->rcvcount);
41f96935 2093 if (!(d->rcvcount = kzalloc(sizeof(int) * m, GFP_ATOMIC))) {
1da177e4 2094 printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
f9101210
JJ		 2095 if (!adding)
2096 kfree(d->rcverr);
1da177e4
LT		 2097 return -1;
2098 }
1da177e4
LT		 2099
2100 if ((adding) && (d->rpqueue)) {
2101 for (j = 0; j < d->channels; j++)
2102 skb_queue_purge(&d->rpqueue[j]);
2103 kfree(d->rpqueue);
2104 }
2105 if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_ATOMIC))) {
2106 printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n");
2107 if (!adding) {
2108 kfree(d->rcvcount);
2109 kfree(d->rcverr);
2110 }
2111 return -1;
2112 }
2113 for (j = 0; j < m; j++) {
2114 skb_queue_head_init(&d->rpqueue[j]);
2115 }
2116
2117 if ((adding) && (d->rcv_waitq))
2118 kfree(d->rcv_waitq);
2119 d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_ATOMIC);
2120 if (!d->rcv_waitq) {
2121 printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n");
2122 if (!adding) {
2123 kfree(d->rpqueue);
2124 kfree(d->rcvcount);
2125 kfree(d->rcverr);
2126 }
2127 return -1;
2128 }
2129 d->snd_waitq = d->rcv_waitq + m;
2130 for (j = 0; j < m; j++) {
2131 init_waitqueue_head(&d->rcv_waitq[j]);
2132 init_waitqueue_head(&d->snd_waitq[j]);
2133 }
2134
2135 dev->channels += n;
2136 for (j = d->channels; j < m; j++)
2137 for (k = 0; k < ISDN_MAX_CHANNELS; k++)
2138 if (dev->chanmap[k] < 0) {
2139 dev->chanmap[k] = j;
2140 dev->drvmap[k] = drvidx;
2141 break;
2142 }
2143 d->channels = m;
2144 return 0;
2145}
2146
2147/*
2148 * Low-level-driver registration
2149 */
2150
2151static void
2152set_global_features(void)
2153{
2154 int drvidx;
2155
2156 dev->global_features = 0;
2157 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) {
2158 if (!dev->drv[drvidx])
2159 continue;
2160 if (dev->drv[drvidx]->interface)
2161 dev->global_features |= dev->drv[drvidx]->interface->features;
2162 }
2163}
2164
2165#ifdef CONFIG_ISDN_DIVERSION
2166
2167static char *map_drvname(int di)
2168{
2169 if ((di < 0) || (di >= ISDN_MAX_DRIVERS))
2170 return(NULL);
2171 return(dev->drvid[di]); /* driver name */
2172} /* map_drvname */
2173
2174static int map_namedrv(char *id)
2175{ int i;
2176
2177 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2178 { if (!strcmp(dev->drvid[i],id))
2179 return(i);
2180 }
2181 return(-1);
2182} /* map_namedrv */
2183
2184int DIVERT_REG_NAME(isdn_divert_if *i_div)
2185{
2186 if (i_div->if_magic != DIVERT_IF_MAGIC)
2187 return(DIVERT_VER_ERR);
2188 switch (i_div->cmd)
2189 {
2190 case DIVERT_CMD_REL:
2191 if (divert_if != i_div)
2192 return(DIVERT_REL_ERR);
2193 divert_if = NULL; /* free interface */
2194 return(DIVERT_NO_ERR);
2195
2196 case DIVERT_CMD_REG:
2197 if (divert_if)
2198 return(DIVERT_REG_ERR);
2199 i_div->ll_cmd = isdn_command; /* set command function */
2200 i_div->drv_to_name = map_drvname;
2201 i_div->name_to_drv = map_namedrv;
2202 divert_if = i_div; /* remember interface */
2203 return(DIVERT_NO_ERR);
2204
2205 default:
2206 return(DIVERT_CMD_ERR);
2207 }
2208} /* DIVERT_REG_NAME */
2209
2210EXPORT_SYMBOL(DIVERT_REG_NAME);
2211
2212#endif /* CONFIG_ISDN_DIVERSION */
2213
2214
2215EXPORT_SYMBOL(register_isdn);
2216#ifdef CONFIG_ISDN_PPP
2217EXPORT_SYMBOL(isdn_ppp_register_compressor);
2218EXPORT_SYMBOL(isdn_ppp_unregister_compressor);
2219#endif
2220
2221int
2222register_isdn(isdn_if * i)
2223{
2224 isdn_driver_t *d;
2225 int j;
2226 ulong flags;
2227 int drvidx;
2228
2229 if (dev->drivers >= ISDN_MAX_DRIVERS) {
2230 printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n",
2231 ISDN_MAX_DRIVERS);
2232 return 0;
2233 }
2234 if (!i->writebuf_skb) {
2235 printk(KERN_WARNING "register_isdn: No write routine given.\n");
2236 return 0;
2237 }
41f96935 2238 if (!(d = kzalloc(sizeof(isdn_driver_t), GFP_KERNEL))) {
1da177e4
LT		 2239 printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n");
2240 return 0;
2241 }
1da177e4
LT		 2242
2243 d->maxbufsize = i->maxbufsize;
2244 d->pktcount = 0;
2245 d->stavail = 0;
2246 d->flags = DRV_FLAG_LOADED;
2247 d->online = 0;
2248 d->interface = i;
2249 d->channels = 0;
2250 spin_lock_irqsave(&dev->lock, flags);
2251 for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2252 if (!dev->drv[drvidx])
2253 break;
2254 if (isdn_add_channels(d, drvidx, i->channels, 0)) {
2255 spin_unlock_irqrestore(&dev->lock, flags);
2256 kfree(d);
2257 return 0;
2258 }
2259 i->channels = drvidx;
2260 i->rcvcallb_skb = isdn_receive_skb_callback;
2261 i->statcallb = isdn_status_callback;
2262 if (!strlen(i->id))
2263 sprintf(i->id, "line%d", drvidx);
2264 for (j = 0; j < drvidx; j++)
2265 if (!strcmp(i->id, dev->drvid[j]))
2266 sprintf(i->id, "line%d", drvidx);
2267 dev->drv[drvidx] = d;
2268 strcpy(dev->drvid[drvidx], i->id);
2269 isdn_info_update();
2270 dev->drivers++;
2271 set_global_features();
2272 spin_unlock_irqrestore(&dev->lock, flags);
2273 return 1;
2274}
2275
2276/*
2277 *****************************************************************************
2278 * And now the modules code.
2279 *****************************************************************************
2280 */
2281
2282static char *
2283isdn_getrev(const char *revision)
2284{
2285 char *rev;
2286 char *p;
2287
2288 if ((p = strchr(revision, ':'))) {
2289 rev = p + 2;
2290 p = strchr(rev, '$');
2291 *--p = 0;
2292 } else
2293 rev = "???";
2294 return rev;
2295}
2296
2297/*
2298 * Allocate and initialize all data, register modem-devices
2299 */
2300static int __init isdn_init(void)
2301{
2302 int i;
2303 char tmprev[50];
2304
7c8347a9 2305 if (!(dev = vmalloc(sizeof(isdn_dev)))) {
1da177e4
LT		 2306 printk(KERN_WARNING "isdn: Could not allocate device-struct.\n");
2307 return -EIO;
2308 }
2309 memset((char *) dev, 0, sizeof(isdn_dev));
2310 init_timer(&dev->timer);
2311 dev->timer.function = isdn_timer_funct;
2312 spin_lock_init(&dev->lock);
2313 spin_lock_init(&dev->timerlock);
2314#ifdef MODULE
2315 dev->owner = THIS_MODULE;
2316#endif
4e3dfaca 2317 mutex_init(&dev->mtx);
1da177e4
LT		 2318 init_waitqueue_head(&dev->info_waitq);
2319 for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
2320 dev->drvmap[i] = -1;
2321 dev->chanmap[i] = -1;
2322 dev->m_idx[i] = -1;
2323 strcpy(dev->num[i], "???");
2324 init_waitqueue_head(&dev->mdm.info[i].open_wait);
2325 init_waitqueue_head(&dev->mdm.info[i].close_wait);
2326 }
2327 if (register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) {
2328 printk(KERN_WARNING "isdn: Could not register control devices\n");
2329 vfree(dev);
2330 return -EIO;
2331 }
2332 if ((isdn_tty_modem_init()) < 0) {
2333 printk(KERN_WARNING "isdn: Could not register tty devices\n");
2334 vfree(dev);
2335 unregister_chrdev(ISDN_MAJOR, "isdn");
2336 return -EIO;
2337 }
2338#ifdef CONFIG_ISDN_PPP
2339 if (isdn_ppp_init() < 0) {
2340 printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n");
2341 isdn_tty_exit();
2342 unregister_chrdev(ISDN_MAJOR, "isdn");
2343 vfree(dev);
2344 return -EIO;
2345 }
2346#endif /* CONFIG_ISDN_PPP */
2347
2348 strcpy(tmprev, isdn_revision);
2349 printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev));
2350 strcpy(tmprev, isdn_tty_revision);
2351 printk("%s/", isdn_getrev(tmprev));
2352 strcpy(tmprev, isdn_net_revision);
2353 printk("%s/", isdn_getrev(tmprev));
2354 strcpy(tmprev, isdn_ppp_revision);
2355 printk("%s/", isdn_getrev(tmprev));
2356 strcpy(tmprev, isdn_audio_revision);
2357 printk("%s/", isdn_getrev(tmprev));
2358 strcpy(tmprev, isdn_v110_revision);
2359 printk("%s", isdn_getrev(tmprev));
2360
2361#ifdef MODULE
2362 printk(" loaded\n");
2363#else
2364 printk("\n");
2365#endif
2366 isdn_info_update();
2367 return 0;
2368}
2369
2370/*
2371 * Unload module
2372 */
2373static void __exit isdn_exit(void)
2374{
2375#ifdef CONFIG_ISDN_PPP
2376 isdn_ppp_cleanup();
2377#endif
2378 if (isdn_net_rmall() < 0) {
2379 printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n");
2380 return;
2381 }
2382 isdn_tty_exit();
2383 unregister_chrdev(ISDN_MAJOR, "isdn");
2384 del_timer(&dev->timer);
2385 /* call vfree with interrupts enabled, else it will hang */
2386 vfree(dev);
2387 printk(KERN_NOTICE "ISDN-subsystem unloaded\n");
2388}
2389
2390module_init(isdn_init);
2391module_exit(isdn_exit);
kernel source for telekom puls (alcatel/mediatek)