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Merge branch 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
[deliverable/linux.git] / drivers / isdn / capi / capi.c
1 /* $Id: capi.c,v 1.1.2.7 2004/04/28 09:48:59 armin Exp $
2 *
3 * CAPI 2.0 Interface for Linux
4 *
5 * Copyright 1996 by Carsten Paeth <calle@calle.de>
6 *
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
9 *
10 */
11
12 #include <linux/module.h>
13 #include <linux/errno.h>
14 #include <linux/kernel.h>
15 #include <linux/major.h>
16 #include <linux/sched.h>
17 #include <linux/slab.h>
18 #include <linux/fcntl.h>
19 #include <linux/fs.h>
20 #include <linux/signal.h>
21 #include <linux/mm.h>
22 #include <linux/smp_lock.h>
23 #include <linux/timer.h>
24 #include <linux/wait.h>
25 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
26 #include <linux/tty.h>
27 #ifdef CONFIG_PPP
28 #include <linux/netdevice.h>
29 #include <linux/ppp_defs.h>
30 #include <linux/if_ppp.h>
31 #endif /* CONFIG_PPP */
32 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
33 #include <linux/skbuff.h>
34 #include <linux/proc_fs.h>
35 #include <linux/poll.h>
36 #include <linux/capi.h>
37 #include <linux/kernelcapi.h>
38 #include <linux/init.h>
39 #include <linux/device.h>
40 #include <linux/moduleparam.h>
41 #include <linux/isdn/capiutil.h>
42 #include <linux/isdn/capicmd.h>
43 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
44 #include "capifs.h"
45 #endif
46
47 static char *revision = "$Revision: 1.1.2.7 $";
48
49 MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
50 MODULE_AUTHOR("Carsten Paeth");
51 MODULE_LICENSE("GPL");
52
53 #undef _DEBUG_REFCOUNT /* alloc/free and open/close debug */
54 #undef _DEBUG_TTYFUNCS /* call to tty_driver */
55 #undef _DEBUG_DATAFLOW /* data flow */
56
57 /* -------- driver information -------------------------------------- */
58
59 static struct class *capi_class;
60
61 static int capi_major = 68; /* allocated */
62 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
63 #define CAPINC_NR_PORTS 32
64 #define CAPINC_MAX_PORTS 256
65 static int capi_ttymajor = 191;
66 static int capi_ttyminors = CAPINC_NR_PORTS;
67 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
68
69 module_param_named(major, capi_major, uint, 0);
70 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
71 module_param_named(ttymajor, capi_ttymajor, uint, 0);
72 module_param_named(ttyminors, capi_ttyminors, uint, 0);
73 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
74
75 /* -------- defines ------------------------------------------------- */
76
77 #define CAPINC_MAX_RECVQUEUE 10
78 #define CAPINC_MAX_SENDQUEUE 10
79 #define CAPI_MAX_BLKSIZE 2048
80
81 /* -------- data structures ----------------------------------------- */
82
83 struct capidev;
84 struct capincci;
85 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
86 struct capiminor;
87
88 struct datahandle_queue {
89 struct list_head list;
90 u16 datahandle;
91 };
92
93 struct capiminor {
94 struct list_head list;
95 struct capincci *nccip;
96 unsigned int minor;
97
98 struct capi20_appl *ap;
99 u32 ncci;
100 u16 datahandle;
101 u16 msgid;
102
103 struct tty_struct *tty;
104 int ttyinstop;
105 int ttyoutstop;
106 struct sk_buff *ttyskb;
107 atomic_t ttyopencount;
108
109 struct sk_buff_head inqueue;
110 int inbytes;
111 struct sk_buff_head outqueue;
112 int outbytes;
113
114 /* transmit path */
115 struct list_head ackqueue;
116 int nack;
117 spinlock_t ackqlock;
118 };
119 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
120
121 struct capincci {
122 struct capincci *next;
123 u32 ncci;
124 struct capidev *cdev;
125 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
126 struct capiminor *minorp;
127 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
128 };
129
130 struct capidev {
131 struct list_head list;
132 struct capi20_appl ap;
133 u16 errcode;
134 unsigned userflags;
135
136 struct sk_buff_head recvqueue;
137 wait_queue_head_t recvwait;
138
139 struct capincci *nccis;
140
141 struct semaphore ncci_list_sem;
142 };
143
144 /* -------- global variables ---------------------------------------- */
145
146 static DEFINE_RWLOCK(capidev_list_lock);
147 static LIST_HEAD(capidev_list);
148
149 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
150 static DEFINE_RWLOCK(capiminor_list_lock);
151 static LIST_HEAD(capiminor_list);
152 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
153
154 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
155 /* -------- datahandles --------------------------------------------- */
156
157 static int capincci_add_ack(struct capiminor *mp, u16 datahandle)
158 {
159 struct datahandle_queue *n;
160 unsigned long flags;
161
162 n = kmalloc(sizeof(*n), GFP_ATOMIC);
163 if (unlikely(!n)) {
164 printk(KERN_ERR "capi: alloc datahandle failed\n");
165 return -1;
166 }
167 n->datahandle = datahandle;
168 INIT_LIST_HEAD(&n->list);
169 spin_lock_irqsave(&mp->ackqlock, flags);
170 list_add_tail(&n->list, &mp->ackqueue);
171 mp->nack++;
172 spin_unlock_irqrestore(&mp->ackqlock, flags);
173 return 0;
174 }
175
176 static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
177 {
178 struct datahandle_queue *p, *tmp;
179 unsigned long flags;
180
181 spin_lock_irqsave(&mp->ackqlock, flags);
182 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
183 if (p->datahandle == datahandle) {
184 list_del(&p->list);
185 kfree(p);
186 mp->nack--;
187 spin_unlock_irqrestore(&mp->ackqlock, flags);
188 return 0;
189 }
190 }
191 spin_unlock_irqrestore(&mp->ackqlock, flags);
192 return -1;
193 }
194
195 static void capiminor_del_all_ack(struct capiminor *mp)
196 {
197 struct datahandle_queue *p, *tmp;
198 unsigned long flags;
199
200 spin_lock_irqsave(&mp->ackqlock, flags);
201 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
202 list_del(&p->list);
203 kfree(p);
204 mp->nack--;
205 }
206 spin_unlock_irqrestore(&mp->ackqlock, flags);
207 }
208
209
210 /* -------- struct capiminor ---------------------------------------- */
211
212 static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
213 {
214 struct capiminor *mp, *p;
215 unsigned int minor = 0;
216 unsigned long flags;
217
218 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
219 if (!mp) {
220 printk(KERN_ERR "capi: can't alloc capiminor\n");
221 return NULL;
222 }
223
224 mp->ap = ap;
225 mp->ncci = ncci;
226 mp->msgid = 0;
227 atomic_set(&mp->ttyopencount,0);
228 INIT_LIST_HEAD(&mp->ackqueue);
229 spin_lock_init(&mp->ackqlock);
230
231 skb_queue_head_init(&mp->inqueue);
232 skb_queue_head_init(&mp->outqueue);
233
234 /* Allocate the least unused minor number.
235 */
236 write_lock_irqsave(&capiminor_list_lock, flags);
237 if (list_empty(&capiminor_list))
238 list_add(&mp->list, &capiminor_list);
239 else {
240 list_for_each_entry(p, &capiminor_list, list) {
241 if (p->minor > minor)
242 break;
243 minor++;
244 }
245
246 if (minor < capi_ttyminors) {
247 mp->minor = minor;
248 list_add(&mp->list, p->list.prev);
249 }
250 }
251 write_unlock_irqrestore(&capiminor_list_lock, flags);
252
253 if (!(minor < capi_ttyminors)) {
254 printk(KERN_NOTICE "capi: out of minors\n");
255 kfree(mp);
256 return NULL;
257 }
258
259 return mp;
260 }
261
262 static void capiminor_free(struct capiminor *mp)
263 {
264 unsigned long flags;
265
266 write_lock_irqsave(&capiminor_list_lock, flags);
267 list_del(&mp->list);
268 write_unlock_irqrestore(&capiminor_list_lock, flags);
269
270 if (mp->ttyskb) kfree_skb(mp->ttyskb);
271 mp->ttyskb = NULL;
272 skb_queue_purge(&mp->inqueue);
273 skb_queue_purge(&mp->outqueue);
274 capiminor_del_all_ack(mp);
275 kfree(mp);
276 }
277
278 static struct capiminor *capiminor_find(unsigned int minor)
279 {
280 struct list_head *l;
281 struct capiminor *p = NULL;
282
283 read_lock(&capiminor_list_lock);
284 list_for_each(l, &capiminor_list) {
285 p = list_entry(l, struct capiminor, list);
286 if (p->minor == minor)
287 break;
288 }
289 read_unlock(&capiminor_list_lock);
290 if (l == &capiminor_list)
291 return NULL;
292
293 return p;
294 }
295 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
296
297 /* -------- struct capincci ----------------------------------------- */
298
299 static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
300 {
301 struct capincci *np, **pp;
302 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
303 struct capiminor *mp = NULL;
304 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
305
306 np = kzalloc(sizeof(*np), GFP_ATOMIC);
307 if (!np)
308 return NULL;
309 np->ncci = ncci;
310 np->cdev = cdev;
311 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
312 mp = NULL;
313 if (cdev->userflags & CAPIFLAG_HIGHJACKING)
314 mp = np->minorp = capiminor_alloc(&cdev->ap, ncci);
315 if (mp) {
316 mp->nccip = np;
317 #ifdef _DEBUG_REFCOUNT
318 printk(KERN_DEBUG "set mp->nccip\n");
319 #endif
320 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
321 capifs_new_ncci(mp->minor, MKDEV(capi_ttymajor, mp->minor));
322 #endif
323 }
324 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
325 for (pp=&cdev->nccis; *pp; pp = &(*pp)->next)
326 ;
327 *pp = np;
328 return np;
329 }
330
331 static void capincci_free(struct capidev *cdev, u32 ncci)
332 {
333 struct capincci *np, **pp;
334 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
335 struct capiminor *mp;
336 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
337
338 pp=&cdev->nccis;
339 while (*pp) {
340 np = *pp;
341 if (ncci == 0xffffffff || np->ncci == ncci) {
342 *pp = (*pp)->next;
343 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
344 if ((mp = np->minorp) != 0) {
345 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
346 capifs_free_ncci(mp->minor);
347 #endif
348 if (mp->tty) {
349 mp->nccip = NULL;
350 #ifdef _DEBUG_REFCOUNT
351 printk(KERN_DEBUG "reset mp->nccip\n");
352 #endif
353 tty_hangup(mp->tty);
354 } else {
355 capiminor_free(mp);
356 }
357 }
358 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
359 kfree(np);
360 if (*pp == 0) return;
361 } else {
362 pp = &(*pp)->next;
363 }
364 }
365 }
366
367 static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
368 {
369 struct capincci *p;
370
371 for (p=cdev->nccis; p ; p = p->next) {
372 if (p->ncci == ncci)
373 break;
374 }
375 return p;
376 }
377
378 /* -------- struct capidev ------------------------------------------ */
379
380 static struct capidev *capidev_alloc(void)
381 {
382 struct capidev *cdev;
383 unsigned long flags;
384
385 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
386 if (!cdev)
387 return NULL;
388
389 init_MUTEX(&cdev->ncci_list_sem);
390 skb_queue_head_init(&cdev->recvqueue);
391 init_waitqueue_head(&cdev->recvwait);
392 write_lock_irqsave(&capidev_list_lock, flags);
393 list_add_tail(&cdev->list, &capidev_list);
394 write_unlock_irqrestore(&capidev_list_lock, flags);
395 return cdev;
396 }
397
398 static void capidev_free(struct capidev *cdev)
399 {
400 unsigned long flags;
401
402 if (cdev->ap.applid) {
403 capi20_release(&cdev->ap);
404 cdev->ap.applid = 0;
405 }
406 skb_queue_purge(&cdev->recvqueue);
407
408 down(&cdev->ncci_list_sem);
409 capincci_free(cdev, 0xffffffff);
410 up(&cdev->ncci_list_sem);
411
412 write_lock_irqsave(&capidev_list_lock, flags);
413 list_del(&cdev->list);
414 write_unlock_irqrestore(&capidev_list_lock, flags);
415 kfree(cdev);
416 }
417
418 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
419 /* -------- handle data queue --------------------------------------- */
420
421 static struct sk_buff *
422 gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb)
423 {
424 struct sk_buff *nskb;
425 nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC);
426 if (nskb) {
427 u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2);
428 unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN);
429 capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN);
430 capimsg_setu16(s, 2, mp->ap->applid);
431 capimsg_setu8 (s, 4, CAPI_DATA_B3);
432 capimsg_setu8 (s, 5, CAPI_RESP);
433 capimsg_setu16(s, 6, mp->msgid++);
434 capimsg_setu32(s, 8, mp->ncci);
435 capimsg_setu16(s, 12, datahandle);
436 }
437 return nskb;
438 }
439
440 static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb)
441 {
442 struct sk_buff *nskb;
443 int datalen;
444 u16 errcode, datahandle;
445 struct tty_ldisc *ld;
446
447 datalen = skb->len - CAPIMSG_LEN(skb->data);
448 if (mp->tty == NULL)
449 {
450 #ifdef _DEBUG_DATAFLOW
451 printk(KERN_DEBUG "capi: currently no receiver\n");
452 #endif
453 return -1;
454 }
455
456 ld = tty_ldisc_ref(mp->tty);
457 if (ld == NULL)
458 return -1;
459 if (ld->receive_buf == NULL) {
460 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
461 printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n");
462 #endif
463 goto bad;
464 }
465 if (mp->ttyinstop) {
466 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
467 printk(KERN_DEBUG "capi: recv tty throttled\n");
468 #endif
469 goto bad;
470 }
471 if (mp->tty->receive_room < datalen) {
472 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
473 printk(KERN_DEBUG "capi: no room in tty\n");
474 #endif
475 goto bad;
476 }
477 if ((nskb = gen_data_b3_resp_for(mp, skb)) == 0) {
478 printk(KERN_ERR "capi: gen_data_b3_resp failed\n");
479 goto bad;
480 }
481 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4);
482 errcode = capi20_put_message(mp->ap, nskb);
483 if (errcode != CAPI_NOERROR) {
484 printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n",
485 errcode);
486 kfree_skb(nskb);
487 goto bad;
488 }
489 (void)skb_pull(skb, CAPIMSG_LEN(skb->data));
490 #ifdef _DEBUG_DATAFLOW
491 printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n",
492 datahandle, skb->len);
493 #endif
494 ld->receive_buf(mp->tty, skb->data, NULL, skb->len);
495 kfree_skb(skb);
496 tty_ldisc_deref(ld);
497 return 0;
498 bad:
499 tty_ldisc_deref(ld);
500 return -1;
501 }
502
503 static void handle_minor_recv(struct capiminor *mp)
504 {
505 struct sk_buff *skb;
506 while ((skb = skb_dequeue(&mp->inqueue)) != 0) {
507 unsigned int len = skb->len;
508 mp->inbytes -= len;
509 if (handle_recv_skb(mp, skb) < 0) {
510 skb_queue_head(&mp->inqueue, skb);
511 mp->inbytes += len;
512 return;
513 }
514 }
515 }
516
517 static int handle_minor_send(struct capiminor *mp)
518 {
519 struct sk_buff *skb;
520 u16 len;
521 int count = 0;
522 u16 errcode;
523 u16 datahandle;
524
525 if (mp->tty && mp->ttyoutstop) {
526 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
527 printk(KERN_DEBUG "capi: send: tty stopped\n");
528 #endif
529 return 0;
530 }
531
532 while ((skb = skb_dequeue(&mp->outqueue)) != 0) {
533 datahandle = mp->datahandle;
534 len = (u16)skb->len;
535 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
536 memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
537 capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
538 capimsg_setu16(skb->data, 2, mp->ap->applid);
539 capimsg_setu8 (skb->data, 4, CAPI_DATA_B3);
540 capimsg_setu8 (skb->data, 5, CAPI_REQ);
541 capimsg_setu16(skb->data, 6, mp->msgid++);
542 capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */
543 capimsg_setu32(skb->data, 12, (u32) skb->data); /* Data32 */
544 capimsg_setu16(skb->data, 16, len); /* Data length */
545 capimsg_setu16(skb->data, 18, datahandle);
546 capimsg_setu16(skb->data, 20, 0); /* Flags */
547
548 if (capincci_add_ack(mp, datahandle) < 0) {
549 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
550 skb_queue_head(&mp->outqueue, skb);
551 return count;
552 }
553 errcode = capi20_put_message(mp->ap, skb);
554 if (errcode == CAPI_NOERROR) {
555 mp->datahandle++;
556 count++;
557 mp->outbytes -= len;
558 #ifdef _DEBUG_DATAFLOW
559 printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n",
560 datahandle, len);
561 #endif
562 continue;
563 }
564 capiminor_del_ack(mp, datahandle);
565
566 if (errcode == CAPI_SENDQUEUEFULL) {
567 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
568 skb_queue_head(&mp->outqueue, skb);
569 break;
570 }
571
572 /* ups, drop packet */
573 printk(KERN_ERR "capi: put_message = %x\n", errcode);
574 mp->outbytes -= len;
575 kfree_skb(skb);
576 }
577 return count;
578 }
579
580 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
581 /* -------- function called by lower level -------------------------- */
582
583 static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
584 {
585 struct capidev *cdev = ap->private;
586 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
587 struct capiminor *mp;
588 u16 datahandle;
589 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
590 struct capincci *np;
591 u32 ncci;
592
593 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) {
594 u16 info = CAPIMSG_U16(skb->data, 12); // Info field
595 if (info == 0) {
596 down(&cdev->ncci_list_sem);
597 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
598 up(&cdev->ncci_list_sem);
599 }
600 }
601 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) {
602 down(&cdev->ncci_list_sem);
603 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
604 up(&cdev->ncci_list_sem);
605 }
606 if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) {
607 skb_queue_tail(&cdev->recvqueue, skb);
608 wake_up_interruptible(&cdev->recvwait);
609 return;
610 }
611 ncci = CAPIMSG_CONTROL(skb->data);
612 for (np = cdev->nccis; np && np->ncci != ncci; np = np->next)
613 ;
614 if (!np) {
615 printk(KERN_ERR "BUG: capi_signal: ncci not found\n");
616 skb_queue_tail(&cdev->recvqueue, skb);
617 wake_up_interruptible(&cdev->recvwait);
618 return;
619 }
620 #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
621 skb_queue_tail(&cdev->recvqueue, skb);
622 wake_up_interruptible(&cdev->recvwait);
623 #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
624 mp = np->minorp;
625 if (!mp) {
626 skb_queue_tail(&cdev->recvqueue, skb);
627 wake_up_interruptible(&cdev->recvwait);
628 return;
629 }
630
631
632 if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) {
633
634 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2);
635 #ifdef _DEBUG_DATAFLOW
636 printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n",
637 datahandle, skb->len-CAPIMSG_LEN(skb->data));
638 #endif
639 skb_queue_tail(&mp->inqueue, skb);
640 mp->inbytes += skb->len;
641 handle_minor_recv(mp);
642
643 } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) {
644
645 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4);
646 #ifdef _DEBUG_DATAFLOW
647 printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n",
648 datahandle,
649 CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2));
650 #endif
651 kfree_skb(skb);
652 (void)capiminor_del_ack(mp, datahandle);
653 if (mp->tty)
654 tty_wakeup(mp->tty);
655 (void)handle_minor_send(mp);
656
657 } else {
658 /* ups, let capi application handle it :-) */
659 skb_queue_tail(&cdev->recvqueue, skb);
660 wake_up_interruptible(&cdev->recvwait);
661 }
662 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
663 }
664
665 /* -------- file_operations for capidev ----------------------------- */
666
667 static ssize_t
668 capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
669 {
670 struct capidev *cdev = (struct capidev *)file->private_data;
671 struct sk_buff *skb;
672 size_t copied;
673
674 if (!cdev->ap.applid)
675 return -ENODEV;
676
677 if ((skb = skb_dequeue(&cdev->recvqueue)) == 0) {
678
679 if (file->f_flags & O_NONBLOCK)
680 return -EAGAIN;
681
682 for (;;) {
683 interruptible_sleep_on(&cdev->recvwait);
684 if ((skb = skb_dequeue(&cdev->recvqueue)) != 0)
685 break;
686 if (signal_pending(current))
687 break;
688 }
689 if (skb == 0)
690 return -ERESTARTNOHAND;
691 }
692 if (skb->len > count) {
693 skb_queue_head(&cdev->recvqueue, skb);
694 return -EMSGSIZE;
695 }
696 if (copy_to_user(buf, skb->data, skb->len)) {
697 skb_queue_head(&cdev->recvqueue, skb);
698 return -EFAULT;
699 }
700 copied = skb->len;
701
702 kfree_skb(skb);
703
704 return copied;
705 }
706
707 static ssize_t
708 capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
709 {
710 struct capidev *cdev = (struct capidev *)file->private_data;
711 struct sk_buff *skb;
712 u16 mlen;
713
714 if (!cdev->ap.applid)
715 return -ENODEV;
716
717 skb = alloc_skb(count, GFP_USER);
718 if (!skb)
719 return -ENOMEM;
720
721 if (copy_from_user(skb_put(skb, count), buf, count)) {
722 kfree_skb(skb);
723 return -EFAULT;
724 }
725 mlen = CAPIMSG_LEN(skb->data);
726 if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
727 if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) {
728 kfree_skb(skb);
729 return -EINVAL;
730 }
731 } else {
732 if (mlen != count) {
733 kfree_skb(skb);
734 return -EINVAL;
735 }
736 }
737 CAPIMSG_SETAPPID(skb->data, cdev->ap.applid);
738
739 if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) {
740 down(&cdev->ncci_list_sem);
741 capincci_free(cdev, CAPIMSG_NCCI(skb->data));
742 up(&cdev->ncci_list_sem);
743 }
744
745 cdev->errcode = capi20_put_message(&cdev->ap, skb);
746
747 if (cdev->errcode) {
748 kfree_skb(skb);
749 return -EIO;
750 }
751 return count;
752 }
753
754 static unsigned int
755 capi_poll(struct file *file, poll_table * wait)
756 {
757 struct capidev *cdev = (struct capidev *)file->private_data;
758 unsigned int mask = 0;
759
760 if (!cdev->ap.applid)
761 return POLLERR;
762
763 poll_wait(file, &(cdev->recvwait), wait);
764 mask = POLLOUT | POLLWRNORM;
765 if (!skb_queue_empty(&cdev->recvqueue))
766 mask |= POLLIN | POLLRDNORM;
767 return mask;
768 }
769
770 static int
771 capi_ioctl(struct inode *inode, struct file *file,
772 unsigned int cmd, unsigned long arg)
773 {
774 struct capidev *cdev = file->private_data;
775 struct capi20_appl *ap = &cdev->ap;
776 capi_ioctl_struct data;
777 int retval = -EINVAL;
778 void __user *argp = (void __user *)arg;
779
780 switch (cmd) {
781 case CAPI_REGISTER:
782 {
783 if (ap->applid)
784 return -EEXIST;
785
786 if (copy_from_user(&cdev->ap.rparam, argp,
787 sizeof(struct capi_register_params)))
788 return -EFAULT;
789
790 cdev->ap.private = cdev;
791 cdev->ap.recv_message = capi_recv_message;
792 cdev->errcode = capi20_register(ap);
793 if (cdev->errcode) {
794 ap->applid = 0;
795 return -EIO;
796 }
797 }
798 return (int)ap->applid;
799
800 case CAPI_GET_VERSION:
801 {
802 if (copy_from_user(&data.contr, argp,
803 sizeof(data.contr)))
804 return -EFAULT;
805 cdev->errcode = capi20_get_version(data.contr, &data.version);
806 if (cdev->errcode)
807 return -EIO;
808 if (copy_to_user(argp, &data.version,
809 sizeof(data.version)))
810 return -EFAULT;
811 }
812 return 0;
813
814 case CAPI_GET_SERIAL:
815 {
816 if (copy_from_user(&data.contr, argp,
817 sizeof(data.contr)))
818 return -EFAULT;
819 cdev->errcode = capi20_get_serial (data.contr, data.serial);
820 if (cdev->errcode)
821 return -EIO;
822 if (copy_to_user(argp, data.serial,
823 sizeof(data.serial)))
824 return -EFAULT;
825 }
826 return 0;
827 case CAPI_GET_PROFILE:
828 {
829 if (copy_from_user(&data.contr, argp,
830 sizeof(data.contr)))
831 return -EFAULT;
832
833 if (data.contr == 0) {
834 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
835 if (cdev->errcode)
836 return -EIO;
837
838 retval = copy_to_user(argp,
839 &data.profile.ncontroller,
840 sizeof(data.profile.ncontroller));
841
842 } else {
843 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
844 if (cdev->errcode)
845 return -EIO;
846
847 retval = copy_to_user(argp, &data.profile,
848 sizeof(data.profile));
849 }
850 if (retval)
851 return -EFAULT;
852 }
853 return 0;
854
855 case CAPI_GET_MANUFACTURER:
856 {
857 if (copy_from_user(&data.contr, argp,
858 sizeof(data.contr)))
859 return -EFAULT;
860 cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer);
861 if (cdev->errcode)
862 return -EIO;
863
864 if (copy_to_user(argp, data.manufacturer,
865 sizeof(data.manufacturer)))
866 return -EFAULT;
867
868 }
869 return 0;
870 case CAPI_GET_ERRCODE:
871 data.errcode = cdev->errcode;
872 cdev->errcode = CAPI_NOERROR;
873 if (arg) {
874 if (copy_to_user(argp, &data.errcode,
875 sizeof(data.errcode)))
876 return -EFAULT;
877 }
878 return data.errcode;
879
880 case CAPI_INSTALLED:
881 if (capi20_isinstalled() == CAPI_NOERROR)
882 return 0;
883 return -ENXIO;
884
885 case CAPI_MANUFACTURER_CMD:
886 {
887 struct capi_manufacturer_cmd mcmd;
888 if (!capable(CAP_SYS_ADMIN))
889 return -EPERM;
890 if (copy_from_user(&mcmd, argp, sizeof(mcmd)))
891 return -EFAULT;
892 return capi20_manufacturer(mcmd.cmd, mcmd.data);
893 }
894 return 0;
895
896 case CAPI_SET_FLAGS:
897 case CAPI_CLR_FLAGS:
898 {
899 unsigned userflags;
900 if (copy_from_user(&userflags, argp,
901 sizeof(userflags)))
902 return -EFAULT;
903 if (cmd == CAPI_SET_FLAGS)
904 cdev->userflags |= userflags;
905 else
906 cdev->userflags &= ~userflags;
907 }
908 return 0;
909
910 case CAPI_GET_FLAGS:
911 if (copy_to_user(argp, &cdev->userflags,
912 sizeof(cdev->userflags)))
913 return -EFAULT;
914 return 0;
915
916 case CAPI_NCCI_OPENCOUNT:
917 {
918 struct capincci *nccip;
919 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
920 struct capiminor *mp;
921 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
922 unsigned ncci;
923 int count = 0;
924 if (copy_from_user(&ncci, argp, sizeof(ncci)))
925 return -EFAULT;
926
927 down(&cdev->ncci_list_sem);
928 if ((nccip = capincci_find(cdev, (u32) ncci)) == 0) {
929 up(&cdev->ncci_list_sem);
930 return 0;
931 }
932 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
933 if ((mp = nccip->minorp) != 0) {
934 count += atomic_read(&mp->ttyopencount);
935 }
936 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
937 up(&cdev->ncci_list_sem);
938 return count;
939 }
940 return 0;
941
942 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
943 case CAPI_NCCI_GETUNIT:
944 {
945 struct capincci *nccip;
946 struct capiminor *mp;
947 unsigned ncci;
948 int unit = 0;
949 if (copy_from_user(&ncci, argp,
950 sizeof(ncci)))
951 return -EFAULT;
952 down(&cdev->ncci_list_sem);
953 nccip = capincci_find(cdev, (u32) ncci);
954 if (!nccip || (mp = nccip->minorp) == 0) {
955 up(&cdev->ncci_list_sem);
956 return -ESRCH;
957 }
958 unit = mp->minor;
959 up(&cdev->ncci_list_sem);
960 return unit;
961 }
962 return 0;
963 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
964 }
965 return -EINVAL;
966 }
967
968 static int
969 capi_open(struct inode *inode, struct file *file)
970 {
971 if (file->private_data)
972 return -EEXIST;
973
974 if ((file->private_data = capidev_alloc()) == 0)
975 return -ENOMEM;
976
977 return nonseekable_open(inode, file);
978 }
979
980 static int
981 capi_release(struct inode *inode, struct file *file)
982 {
983 struct capidev *cdev = (struct capidev *)file->private_data;
984
985 capidev_free(cdev);
986 file->private_data = NULL;
987
988 return 0;
989 }
990
991 static struct file_operations capi_fops =
992 {
993 .owner = THIS_MODULE,
994 .llseek = no_llseek,
995 .read = capi_read,
996 .write = capi_write,
997 .poll = capi_poll,
998 .ioctl = capi_ioctl,
999 .open = capi_open,
1000 .release = capi_release,
1001 };
1002
1003 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1004 /* -------- tty_operations for capincci ----------------------------- */
1005
1006 static int capinc_tty_open(struct tty_struct * tty, struct file * file)
1007 {
1008 struct capiminor *mp;
1009
1010 if ((mp = capiminor_find(iminor(file->f_path.dentry->d_inode))) == 0)
1011 return -ENXIO;
1012 if (mp->nccip == 0)
1013 return -ENXIO;
1014
1015 tty->driver_data = (void *)mp;
1016
1017 if (atomic_read(&mp->ttyopencount) == 0)
1018 mp->tty = tty;
1019 atomic_inc(&mp->ttyopencount);
1020 #ifdef _DEBUG_REFCOUNT
1021 printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount));
1022 #endif
1023 handle_minor_recv(mp);
1024 return 0;
1025 }
1026
1027 static void capinc_tty_close(struct tty_struct * tty, struct file * file)
1028 {
1029 struct capiminor *mp;
1030
1031 mp = (struct capiminor *)tty->driver_data;
1032 if (mp) {
1033 if (atomic_dec_and_test(&mp->ttyopencount)) {
1034 #ifdef _DEBUG_REFCOUNT
1035 printk(KERN_DEBUG "capinc_tty_close lastclose\n");
1036 #endif
1037 tty->driver_data = NULL;
1038 mp->tty = NULL;
1039 }
1040 #ifdef _DEBUG_REFCOUNT
1041 printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount));
1042 #endif
1043 if (mp->nccip == 0)
1044 capiminor_free(mp);
1045 }
1046
1047 #ifdef _DEBUG_REFCOUNT
1048 printk(KERN_DEBUG "capinc_tty_close\n");
1049 #endif
1050 }
1051
1052 static int capinc_tty_write(struct tty_struct * tty,
1053 const unsigned char *buf, int count)
1054 {
1055 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1056 struct sk_buff *skb;
1057
1058 #ifdef _DEBUG_TTYFUNCS
1059 printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count);
1060 #endif
1061
1062 if (!mp || !mp->nccip) {
1063 #ifdef _DEBUG_TTYFUNCS
1064 printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n");
1065 #endif
1066 return 0;
1067 }
1068
1069 skb = mp->ttyskb;
1070 if (skb) {
1071 mp->ttyskb = NULL;
1072 skb_queue_tail(&mp->outqueue, skb);
1073 mp->outbytes += skb->len;
1074 }
1075
1076 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC);
1077 if (!skb) {
1078 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
1079 return -ENOMEM;
1080 }
1081
1082 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1083 memcpy(skb_put(skb, count), buf, count);
1084
1085 skb_queue_tail(&mp->outqueue, skb);
1086 mp->outbytes += skb->len;
1087 (void)handle_minor_send(mp);
1088 (void)handle_minor_recv(mp);
1089 return count;
1090 }
1091
1092 static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
1093 {
1094 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1095 struct sk_buff *skb;
1096
1097 #ifdef _DEBUG_TTYFUNCS
1098 printk(KERN_DEBUG "capinc_put_char(%u)\n", ch);
1099 #endif
1100
1101 if (!mp || !mp->nccip) {
1102 #ifdef _DEBUG_TTYFUNCS
1103 printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n");
1104 #endif
1105 return;
1106 }
1107
1108 skb = mp->ttyskb;
1109 if (skb) {
1110 if (skb_tailroom(skb) > 0) {
1111 *(skb_put(skb, 1)) = ch;
1112 return;
1113 }
1114 mp->ttyskb = NULL;
1115 skb_queue_tail(&mp->outqueue, skb);
1116 mp->outbytes += skb->len;
1117 (void)handle_minor_send(mp);
1118 }
1119 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC);
1120 if (skb) {
1121 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1122 *(skb_put(skb, 1)) = ch;
1123 mp->ttyskb = skb;
1124 } else {
1125 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
1126 }
1127 }
1128
1129 static void capinc_tty_flush_chars(struct tty_struct *tty)
1130 {
1131 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1132 struct sk_buff *skb;
1133
1134 #ifdef _DEBUG_TTYFUNCS
1135 printk(KERN_DEBUG "capinc_tty_flush_chars\n");
1136 #endif
1137
1138 if (!mp || !mp->nccip) {
1139 #ifdef _DEBUG_TTYFUNCS
1140 printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n");
1141 #endif
1142 return;
1143 }
1144
1145 skb = mp->ttyskb;
1146 if (skb) {
1147 mp->ttyskb = NULL;
1148 skb_queue_tail(&mp->outqueue, skb);
1149 mp->outbytes += skb->len;
1150 (void)handle_minor_send(mp);
1151 }
1152 (void)handle_minor_recv(mp);
1153 }
1154
1155 static int capinc_tty_write_room(struct tty_struct *tty)
1156 {
1157 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1158 int room;
1159 if (!mp || !mp->nccip) {
1160 #ifdef _DEBUG_TTYFUNCS
1161 printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n");
1162 #endif
1163 return 0;
1164 }
1165 room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
1166 room *= CAPI_MAX_BLKSIZE;
1167 #ifdef _DEBUG_TTYFUNCS
1168 printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room);
1169 #endif
1170 return room;
1171 }
1172
1173 static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
1174 {
1175 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1176 if (!mp || !mp->nccip) {
1177 #ifdef _DEBUG_TTYFUNCS
1178 printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n");
1179 #endif
1180 return 0;
1181 }
1182 #ifdef _DEBUG_TTYFUNCS
1183 printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
1184 mp->outbytes, mp->nack,
1185 skb_queue_len(&mp->outqueue),
1186 skb_queue_len(&mp->inqueue));
1187 #endif
1188 return mp->outbytes;
1189 }
1190
1191 static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file,
1192 unsigned int cmd, unsigned long arg)
1193 {
1194 int error = 0;
1195 switch (cmd) {
1196 default:
1197 error = n_tty_ioctl (tty, file, cmd, arg);
1198 break;
1199 }
1200 return error;
1201 }
1202
1203 static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios * old)
1204 {
1205 #ifdef _DEBUG_TTYFUNCS
1206 printk(KERN_DEBUG "capinc_tty_set_termios\n");
1207 #endif
1208 }
1209
1210 static void capinc_tty_throttle(struct tty_struct * tty)
1211 {
1212 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1213 #ifdef _DEBUG_TTYFUNCS
1214 printk(KERN_DEBUG "capinc_tty_throttle\n");
1215 #endif
1216 if (mp)
1217 mp->ttyinstop = 1;
1218 }
1219
1220 static void capinc_tty_unthrottle(struct tty_struct * tty)
1221 {
1222 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1223 #ifdef _DEBUG_TTYFUNCS
1224 printk(KERN_DEBUG "capinc_tty_unthrottle\n");
1225 #endif
1226 if (mp) {
1227 mp->ttyinstop = 0;
1228 handle_minor_recv(mp);
1229 }
1230 }
1231
1232 static void capinc_tty_stop(struct tty_struct *tty)
1233 {
1234 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1235 #ifdef _DEBUG_TTYFUNCS
1236 printk(KERN_DEBUG "capinc_tty_stop\n");
1237 #endif
1238 if (mp) {
1239 mp->ttyoutstop = 1;
1240 }
1241 }
1242
1243 static void capinc_tty_start(struct tty_struct *tty)
1244 {
1245 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1246 #ifdef _DEBUG_TTYFUNCS
1247 printk(KERN_DEBUG "capinc_tty_start\n");
1248 #endif
1249 if (mp) {
1250 mp->ttyoutstop = 0;
1251 (void)handle_minor_send(mp);
1252 }
1253 }
1254
1255 static void capinc_tty_hangup(struct tty_struct *tty)
1256 {
1257 #ifdef _DEBUG_TTYFUNCS
1258 printk(KERN_DEBUG "capinc_tty_hangup\n");
1259 #endif
1260 }
1261
1262 static void capinc_tty_break_ctl(struct tty_struct *tty, int state)
1263 {
1264 #ifdef _DEBUG_TTYFUNCS
1265 printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state);
1266 #endif
1267 }
1268
1269 static void capinc_tty_flush_buffer(struct tty_struct *tty)
1270 {
1271 #ifdef _DEBUG_TTYFUNCS
1272 printk(KERN_DEBUG "capinc_tty_flush_buffer\n");
1273 #endif
1274 }
1275
1276 static void capinc_tty_set_ldisc(struct tty_struct *tty)
1277 {
1278 #ifdef _DEBUG_TTYFUNCS
1279 printk(KERN_DEBUG "capinc_tty_set_ldisc\n");
1280 #endif
1281 }
1282
1283 static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
1284 {
1285 #ifdef _DEBUG_TTYFUNCS
1286 printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch);
1287 #endif
1288 }
1289
1290 static int capinc_tty_read_proc(char *page, char **start, off_t off,
1291 int count, int *eof, void *data)
1292 {
1293 return 0;
1294 }
1295
1296 static struct tty_driver *capinc_tty_driver;
1297
1298 static const struct tty_operations capinc_ops = {
1299 .open = capinc_tty_open,
1300 .close = capinc_tty_close,
1301 .write = capinc_tty_write,
1302 .put_char = capinc_tty_put_char,
1303 .flush_chars = capinc_tty_flush_chars,
1304 .write_room = capinc_tty_write_room,
1305 .chars_in_buffer = capinc_tty_chars_in_buffer,
1306 .ioctl = capinc_tty_ioctl,
1307 .set_termios = capinc_tty_set_termios,
1308 .throttle = capinc_tty_throttle,
1309 .unthrottle = capinc_tty_unthrottle,
1310 .stop = capinc_tty_stop,
1311 .start = capinc_tty_start,
1312 .hangup = capinc_tty_hangup,
1313 .break_ctl = capinc_tty_break_ctl,
1314 .flush_buffer = capinc_tty_flush_buffer,
1315 .set_ldisc = capinc_tty_set_ldisc,
1316 .send_xchar = capinc_tty_send_xchar,
1317 .read_proc = capinc_tty_read_proc,
1318 };
1319
1320 static int capinc_tty_init(void)
1321 {
1322 struct tty_driver *drv;
1323
1324 if (capi_ttyminors > CAPINC_MAX_PORTS)
1325 capi_ttyminors = CAPINC_MAX_PORTS;
1326 if (capi_ttyminors <= 0)
1327 capi_ttyminors = CAPINC_NR_PORTS;
1328
1329 drv = alloc_tty_driver(capi_ttyminors);
1330 if (!drv)
1331 return -ENOMEM;
1332
1333 drv->owner = THIS_MODULE;
1334 drv->driver_name = "capi_nc";
1335 drv->name = "capi";
1336 drv->major = capi_ttymajor;
1337 drv->minor_start = 0;
1338 drv->type = TTY_DRIVER_TYPE_SERIAL;
1339 drv->subtype = SERIAL_TYPE_NORMAL;
1340 drv->init_termios = tty_std_termios;
1341 drv->init_termios.c_iflag = ICRNL;
1342 drv->init_termios.c_oflag = OPOST | ONLCR;
1343 drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1344 drv->init_termios.c_lflag = 0;
1345 drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS;
1346 tty_set_operations(drv, &capinc_ops);
1347 if (tty_register_driver(drv)) {
1348 put_tty_driver(drv);
1349 printk(KERN_ERR "Couldn't register capi_nc driver\n");
1350 return -1;
1351 }
1352 capinc_tty_driver = drv;
1353 return 0;
1354 }
1355
1356 static void capinc_tty_exit(void)
1357 {
1358 struct tty_driver *drv = capinc_tty_driver;
1359 int retval;
1360 if ((retval = tty_unregister_driver(drv)))
1361 printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval);
1362 put_tty_driver(drv);
1363 }
1364
1365 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
1366
1367 /* -------- /proc functions ----------------------------------------- */
1368
1369 /*
1370 * /proc/capi/capi20:
1371 * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
1372 */
1373 static int proc_capidev_read_proc(char *page, char **start, off_t off,
1374 int count, int *eof, void *data)
1375 {
1376 struct capidev *cdev;
1377 struct list_head *l;
1378 int len = 0;
1379
1380 read_lock(&capidev_list_lock);
1381 list_for_each(l, &capidev_list) {
1382 cdev = list_entry(l, struct capidev, list);
1383 len += sprintf(page+len, "0 %d %lu %lu %lu %lu\n",
1384 cdev->ap.applid,
1385 cdev->ap.nrecvctlpkt,
1386 cdev->ap.nrecvdatapkt,
1387 cdev->ap.nsentctlpkt,
1388 cdev->ap.nsentdatapkt);
1389 if (len <= off) {
1390 off -= len;
1391 len = 0;
1392 } else {
1393 if (len-off > count)
1394 goto endloop;
1395 }
1396 }
1397
1398 endloop:
1399 read_unlock(&capidev_list_lock);
1400 if (len < count)
1401 *eof = 1;
1402 if (len > count) len = count;
1403 if (len < 0) len = 0;
1404 return len;
1405 }
1406
1407 /*
1408 * /proc/capi/capi20ncci:
1409 * applid ncci
1410 */
1411 static int proc_capincci_read_proc(char *page, char **start, off_t off,
1412 int count, int *eof, void *data)
1413 {
1414 struct capidev *cdev;
1415 struct capincci *np;
1416 struct list_head *l;
1417 int len = 0;
1418
1419 read_lock(&capidev_list_lock);
1420 list_for_each(l, &capidev_list) {
1421 cdev = list_entry(l, struct capidev, list);
1422 for (np=cdev->nccis; np; np = np->next) {
1423 len += sprintf(page+len, "%d 0x%x\n",
1424 cdev->ap.applid,
1425 np->ncci);
1426 if (len <= off) {
1427 off -= len;
1428 len = 0;
1429 } else {
1430 if (len-off > count)
1431 goto endloop;
1432 }
1433 }
1434 }
1435 endloop:
1436 read_unlock(&capidev_list_lock);
1437 *start = page+off;
1438 if (len < count)
1439 *eof = 1;
1440 if (len>count) len = count;
1441 if (len<0) len = 0;
1442 return len;
1443 }
1444
1445 static struct procfsentries {
1446 char *name;
1447 mode_t mode;
1448 int (*read_proc)(char *page, char **start, off_t off,
1449 int count, int *eof, void *data);
1450 struct proc_dir_entry *procent;
1451 } procfsentries[] = {
1452 /* { "capi", S_IFDIR, 0 }, */
1453 { "capi/capi20", 0 , proc_capidev_read_proc },
1454 { "capi/capi20ncci", 0 , proc_capincci_read_proc },
1455 };
1456
1457 static void __init proc_init(void)
1458 {
1459 int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
1460 int i;
1461
1462 for (i=0; i < nelem; i++) {
1463 struct procfsentries *p = procfsentries + i;
1464 p->procent = create_proc_entry(p->name, p->mode, NULL);
1465 if (p->procent) p->procent->read_proc = p->read_proc;
1466 }
1467 }
1468
1469 static void __exit proc_exit(void)
1470 {
1471 int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
1472 int i;
1473
1474 for (i=nelem-1; i >= 0; i--) {
1475 struct procfsentries *p = procfsentries + i;
1476 if (p->procent) {
1477 remove_proc_entry(p->name, NULL);
1478 p->procent = NULL;
1479 }
1480 }
1481 }
1482
1483 /* -------- init function and module interface ---------------------- */
1484
1485
1486 static char rev[32];
1487
1488 static int __init capi_init(void)
1489 {
1490 char *p;
1491 char *compileinfo;
1492 int major_ret;
1493
1494 if ((p = strchr(revision, ':')) != 0 && p[1]) {
1495 strlcpy(rev, p + 2, sizeof(rev));
1496 if ((p = strchr(rev, '$')) != 0 && p > rev)
1497 *(p-1) = 0;
1498 } else
1499 strcpy(rev, "1.0");
1500
1501 major_ret = register_chrdev(capi_major, "capi20", &capi_fops);
1502 if (major_ret < 0) {
1503 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
1504 return major_ret;
1505 }
1506 capi_class = class_create(THIS_MODULE, "capi");
1507 if (IS_ERR(capi_class)) {
1508 unregister_chrdev(capi_major, "capi20");
1509 return PTR_ERR(capi_class);
1510 }
1511
1512 class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
1513
1514 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1515 if (capinc_tty_init() < 0) {
1516 class_device_destroy(capi_class, MKDEV(capi_major, 0));
1517 class_destroy(capi_class);
1518 unregister_chrdev(capi_major, "capi20");
1519 return -ENOMEM;
1520 }
1521 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
1522
1523 proc_init();
1524
1525 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1526 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
1527 compileinfo = " (middleware+capifs)";
1528 #else
1529 compileinfo = " (no capifs)";
1530 #endif
1531 #else
1532 compileinfo = " (no middleware)";
1533 #endif
1534 printk(KERN_NOTICE "capi20: Rev %s: started up with major %d%s\n",
1535 rev, capi_major, compileinfo);
1536
1537 return 0;
1538 }
1539
1540 static void __exit capi_exit(void)
1541 {
1542 proc_exit();
1543
1544 class_device_destroy(capi_class, MKDEV(capi_major, 0));
1545 class_destroy(capi_class);
1546 unregister_chrdev(capi_major, "capi20");
1547
1548 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1549 capinc_tty_exit();
1550 #endif
1551 printk(KERN_NOTICE "capi: Rev %s: unloaded\n", rev);
1552 }
1553
1554 module_init(capi_init);
1555 module_exit(capi_exit);
Linux kernel - Deliverables
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