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proc: use seq_puts()/seq_putc() where possible
[linux-2.6/next.git] / drivers / isdn / capi / capi.c
blobf80a7c48a35f852f4d5912f42a6af846769c9fa4
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/mutex.h>
22 #include <linux/mm.h>
23 #include <linux/timer.h>
24 #include <linux/wait.h>
25 #include <linux/tty.h>
26 #include <linux/netdevice.h>
27 #include <linux/ppp_defs.h>
28 #include <linux/if_ppp.h>
29 #include <linux/skbuff.h>
30 #include <linux/proc_fs.h>
31 #include <linux/seq_file.h>
32 #include <linux/poll.h>
33 #include <linux/capi.h>
34 #include <linux/kernelcapi.h>
35 #include <linux/init.h>
36 #include <linux/device.h>
37 #include <linux/moduleparam.h>
38 #include <linux/isdn/capiutil.h>
39 #include <linux/isdn/capicmd.h>
40
41 #include "capifs.h"
42
43 MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
44 MODULE_AUTHOR("Carsten Paeth");
45 MODULE_LICENSE("GPL");
46
47 #undef _DEBUG_TTYFUNCS /* call to tty_driver */
48 #undef _DEBUG_DATAFLOW /* data flow */
49
50 /* -------- driver information -------------------------------------- */
51
52 static DEFINE_MUTEX(capi_mutex);
53 static struct class *capi_class;
54 static int capi_major = 68; /* allocated */
55
56 module_param_named(major, capi_major, uint, 0);
57
58 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
59 #define CAPINC_NR_PORTS 32
60 #define CAPINC_MAX_PORTS 256
61
62 static int capi_ttyminors = CAPINC_NR_PORTS;
63
64 module_param_named(ttyminors, capi_ttyminors, uint, 0);
65 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
66
67 /* -------- defines ------------------------------------------------- */
68
69 #define CAPINC_MAX_RECVQUEUE 10
70 #define CAPINC_MAX_SENDQUEUE 10
71 #define CAPI_MAX_BLKSIZE 2048
72
73 /* -------- data structures ----------------------------------------- */
74
75 struct capidev;
76 struct capincci;
77 struct capiminor;
78
79 struct ackqueue_entry {
80 struct list_head list;
81 u16 datahandle;
82 };
83
84 struct capiminor {
85 struct kref kref;
86
87 unsigned int minor;
88 struct dentry *capifs_dentry;
89
90 struct capi20_appl *ap;
91 u32 ncci;
92 atomic_t datahandle;
93 atomic_t msgid;
94
95 struct tty_port port;
96 int ttyinstop;
97 int ttyoutstop;
98
99 struct sk_buff_head inqueue;
100
101 struct sk_buff_head outqueue;
102 int outbytes;
103 struct sk_buff *outskb;
104 spinlock_t outlock;
105
106 /* transmit path */
107 struct list_head ackqueue;
108 int nack;
109 spinlock_t ackqlock;
110 };
111
112 struct capincci {
113 struct list_head list;
114 u32 ncci;
115 struct capidev *cdev;
116 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
117 struct capiminor *minorp;
118 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
119 };
120
121 struct capidev {
122 struct list_head list;
123 struct capi20_appl ap;
124 u16 errcode;
125 unsigned userflags;
126
127 struct sk_buff_head recvqueue;
128 wait_queue_head_t recvwait;
129
130 struct list_head nccis;
131
132 struct mutex lock;
133 };
134
135 /* -------- global variables ---------------------------------------- */
136
137 static DEFINE_MUTEX(capidev_list_lock);
138 static LIST_HEAD(capidev_list);
139
140 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
141
142 static DEFINE_SPINLOCK(capiminors_lock);
143 static struct capiminor **capiminors;
144
145 static struct tty_driver *capinc_tty_driver;
146
147 /* -------- datahandles --------------------------------------------- */
148
149 static int capiminor_add_ack(struct capiminor *mp, u16 datahandle)
150 {
151 struct ackqueue_entry *n;
152
153 n = kmalloc(sizeof(*n), GFP_ATOMIC);
154 if (unlikely(!n)) {
155 printk(KERN_ERR "capi: alloc datahandle failed\n");
156 return -1;
157 }
158 n->datahandle = datahandle;
159 INIT_LIST_HEAD(&n->list);
160 spin_lock_bh(&mp->ackqlock);
161 list_add_tail(&n->list, &mp->ackqueue);
162 mp->nack++;
163 spin_unlock_bh(&mp->ackqlock);
164 return 0;
165 }
166
167 static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
168 {
169 struct ackqueue_entry *p, *tmp;
170
171 spin_lock_bh(&mp->ackqlock);
172 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
173 if (p->datahandle == datahandle) {
174 list_del(&p->list);
175 mp->nack--;
176 spin_unlock_bh(&mp->ackqlock);
177 kfree(p);
178 return 0;
179 }
180 }
181 spin_unlock_bh(&mp->ackqlock);
182 return -1;
183 }
184
185 static void capiminor_del_all_ack(struct capiminor *mp)
186 {
187 struct ackqueue_entry *p, *tmp;
188
189 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
190 list_del(&p->list);
191 kfree(p);
192 mp->nack--;
193 }
194 }
195
196
197 /* -------- struct capiminor ---------------------------------------- */
198
199 static const struct tty_port_operations capiminor_port_ops; /* we have none */
200
201 static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
202 {
203 struct capiminor *mp;
204 struct device *dev;
205 unsigned int minor;
206
207 mp = kzalloc(sizeof(*mp), GFP_KERNEL);
208 if (!mp) {
209 printk(KERN_ERR "capi: can't alloc capiminor\n");
210 return NULL;
211 }
212
213 kref_init(&mp->kref);
214
215 mp->ap = ap;
216 mp->ncci = ncci;
217 INIT_LIST_HEAD(&mp->ackqueue);
218 spin_lock_init(&mp->ackqlock);
219
220 skb_queue_head_init(&mp->inqueue);
221 skb_queue_head_init(&mp->outqueue);
222 spin_lock_init(&mp->outlock);
223
224 tty_port_init(&mp->port);
225 mp->port.ops = &capiminor_port_ops;
226
227 /* Allocate the least unused minor number. */
228 spin_lock(&capiminors_lock);
229 for (minor = 0; minor < capi_ttyminors; minor++)
230 if (!capiminors[minor]) {
231 capiminors[minor] = mp;
232 break;
233 }
234 spin_unlock(&capiminors_lock);
235
236 if (minor == capi_ttyminors) {
237 printk(KERN_NOTICE "capi: out of minors\n");
238 goto err_out1;
239 }
240
241 mp->minor = minor;
242
243 dev = tty_register_device(capinc_tty_driver, minor, NULL);
244 if (IS_ERR(dev))
245 goto err_out2;
246
247 return mp;
248
249 err_out2:
250 spin_lock(&capiminors_lock);
251 capiminors[minor] = NULL;
252 spin_unlock(&capiminors_lock);
253
254 err_out1:
255 kfree(mp);
256 return NULL;
257 }
258
259 static void capiminor_destroy(struct kref *kref)
260 {
261 struct capiminor *mp = container_of(kref, struct capiminor, kref);
262
263 kfree_skb(mp->outskb);
264 skb_queue_purge(&mp->inqueue);
265 skb_queue_purge(&mp->outqueue);
266 capiminor_del_all_ack(mp);
267 kfree(mp);
268 }
269
270 static struct capiminor *capiminor_get(unsigned int minor)
271 {
272 struct capiminor *mp;
273
274 spin_lock(&capiminors_lock);
275 mp = capiminors[minor];
276 if (mp)
277 kref_get(&mp->kref);
278 spin_unlock(&capiminors_lock);
279
280 return mp;
281 }
282
283 static inline void capiminor_put(struct capiminor *mp)
284 {
285 kref_put(&mp->kref, capiminor_destroy);
286 }
287
288 static void capiminor_free(struct capiminor *mp)
289 {
290 tty_unregister_device(capinc_tty_driver, mp->minor);
291
292 spin_lock(&capiminors_lock);
293 capiminors[mp->minor] = NULL;
294 spin_unlock(&capiminors_lock);
295
296 capiminor_put(mp);
297 }
298
299 /* -------- struct capincci ----------------------------------------- */
300
301 static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np)
302 {
303 struct capiminor *mp;
304 dev_t device;
305
306 if (!(cdev->userflags & CAPIFLAG_HIGHJACKING))
307 return;
308
309 mp = np->minorp = capiminor_alloc(&cdev->ap, np->ncci);
310 if (mp) {
311 device = MKDEV(capinc_tty_driver->major, mp->minor);
312 mp->capifs_dentry = capifs_new_ncci(mp->minor, device);
313 }
314 }
315
316 static void capincci_free_minor(struct capincci *np)
317 {
318 struct capiminor *mp = np->minorp;
319 struct tty_struct *tty;
320
321 if (mp) {
322 capifs_free_ncci(mp->capifs_dentry);
323
324 tty = tty_port_tty_get(&mp->port);
325 if (tty) {
326 tty_vhangup(tty);
327 tty_kref_put(tty);
328 }
329
330 capiminor_free(mp);
331 }
332 }
333
334 static inline unsigned int capincci_minor_opencount(struct capincci *np)
335 {
336 struct capiminor *mp = np->minorp;
337 unsigned int count = 0;
338 struct tty_struct *tty;
339
340 if (mp) {
341 tty = tty_port_tty_get(&mp->port);
342 if (tty) {
343 count = tty->count;
344 tty_kref_put(tty);
345 }
346 }
347 return count;
348 }
349
350 #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
351
352 static inline void
353 capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { }
354 static inline void capincci_free_minor(struct capincci *np) { }
355
356 static inline unsigned int capincci_minor_opencount(struct capincci *np)
357 {
358 return 0;
359 }
360
361 #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
362
363 static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
364 {
365 struct capincci *np;
366
367 np = kzalloc(sizeof(*np), GFP_KERNEL);
368 if (!np)
369 return NULL;
370 np->ncci = ncci;
371 np->cdev = cdev;
372
373 capincci_alloc_minor(cdev, np);
374
375 list_add_tail(&np->list, &cdev->nccis);
376
377 return np;
378 }
379
380 static void capincci_free(struct capidev *cdev, u32 ncci)
381 {
382 struct capincci *np, *tmp;
383
384 list_for_each_entry_safe(np, tmp, &cdev->nccis, list)
385 if (ncci == 0xffffffff || np->ncci == ncci) {
386 capincci_free_minor(np);
387 list_del(&np->list);
388 kfree(np);
389 }
390 }
391
392 static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
393 {
394 struct capincci *np;
395
396 list_for_each_entry(np, &cdev->nccis, list)
397 if (np->ncci == ncci)
398 return np;
399 return NULL;
400 }
401
402 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
403 /* -------- handle data queue --------------------------------------- */
404
405 static struct sk_buff *
406 gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb)
407 {
408 struct sk_buff *nskb;
409 nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_KERNEL);
410 if (nskb) {
411 u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2);
412 unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN);
413 capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN);
414 capimsg_setu16(s, 2, mp->ap->applid);
415 capimsg_setu8 (s, 4, CAPI_DATA_B3);
416 capimsg_setu8 (s, 5, CAPI_RESP);
417 capimsg_setu16(s, 6, atomic_inc_return(&mp->msgid));
418 capimsg_setu32(s, 8, mp->ncci);
419 capimsg_setu16(s, 12, datahandle);
420 }
421 return nskb;
422 }
423
424 static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb)
425 {
426 unsigned int datalen = skb->len - CAPIMSG_LEN(skb->data);
427 struct tty_struct *tty;
428 struct sk_buff *nskb;
429 u16 errcode, datahandle;
430 struct tty_ldisc *ld;
431 int ret = -1;
432
433 tty = tty_port_tty_get(&mp->port);
434 if (!tty) {
435 #ifdef _DEBUG_DATAFLOW
436 printk(KERN_DEBUG "capi: currently no receiver\n");
437 #endif
438 return -1;
439 }
440
441 ld = tty_ldisc_ref(tty);
442 if (!ld) {
443 /* fatal error, do not requeue */
444 ret = 0;
445 kfree_skb(skb);
446 goto deref_tty;
447 }
448
449 if (ld->ops->receive_buf == NULL) {
450 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
451 printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n");
452 #endif
453 /* fatal error, do not requeue */
454 goto free_skb;
455 }
456 if (mp->ttyinstop) {
457 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
458 printk(KERN_DEBUG "capi: recv tty throttled\n");
459 #endif
460 goto deref_ldisc;
461 }
462
463 if (tty->receive_room < datalen) {
464 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
465 printk(KERN_DEBUG "capi: no room in tty\n");
466 #endif
467 goto deref_ldisc;
468 }
469
470 nskb = gen_data_b3_resp_for(mp, skb);
471 if (!nskb) {
472 printk(KERN_ERR "capi: gen_data_b3_resp failed\n");
473 goto deref_ldisc;
474 }
475
476 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4);
477
478 errcode = capi20_put_message(mp->ap, nskb);
479
480 if (errcode == CAPI_NOERROR) {
481 skb_pull(skb, CAPIMSG_LEN(skb->data));
482 #ifdef _DEBUG_DATAFLOW
483 printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n",
484 datahandle, skb->len);
485 #endif
486 ld->ops->receive_buf(tty, skb->data, NULL, skb->len);
487 } else {
488 printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n",
489 errcode);
490 kfree_skb(nskb);
491
492 if (errcode == CAPI_SENDQUEUEFULL)
493 goto deref_ldisc;
494 }
495
496 free_skb:
497 ret = 0;
498 kfree_skb(skb);
499
500 deref_ldisc:
501 tty_ldisc_deref(ld);
502
503 deref_tty:
504 tty_kref_put(tty);
505 return ret;
506 }
507
508 static void handle_minor_recv(struct capiminor *mp)
509 {
510 struct sk_buff *skb;
511
512 while ((skb = skb_dequeue(&mp->inqueue)) != NULL)
513 if (handle_recv_skb(mp, skb) < 0) {
514 skb_queue_head(&mp->inqueue, skb);
515 return;
516 }
517 }
518
519 static void handle_minor_send(struct capiminor *mp)
520 {
521 struct tty_struct *tty;
522 struct sk_buff *skb;
523 u16 len;
524 u16 errcode;
525 u16 datahandle;
526
527 tty = tty_port_tty_get(&mp->port);
528 if (!tty)
529 return;
530
531 if (mp->ttyoutstop) {
532 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
533 printk(KERN_DEBUG "capi: send: tty stopped\n");
534 #endif
535 tty_kref_put(tty);
536 return;
537 }
538
539 while (1) {
540 spin_lock_bh(&mp->outlock);
541 skb = __skb_dequeue(&mp->outqueue);
542 if (!skb) {
543 spin_unlock_bh(&mp->outlock);
544 break;
545 }
546 len = (u16)skb->len;
547 mp->outbytes -= len;
548 spin_unlock_bh(&mp->outlock);
549
550 datahandle = atomic_inc_return(&mp->datahandle);
551 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
552 memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
553 capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
554 capimsg_setu16(skb->data, 2, mp->ap->applid);
555 capimsg_setu8 (skb->data, 4, CAPI_DATA_B3);
556 capimsg_setu8 (skb->data, 5, CAPI_REQ);
557 capimsg_setu16(skb->data, 6, atomic_inc_return(&mp->msgid));
558 capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */
559 capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */
560 capimsg_setu16(skb->data, 16, len); /* Data length */
561 capimsg_setu16(skb->data, 18, datahandle);
562 capimsg_setu16(skb->data, 20, 0); /* Flags */
563
564 if (capiminor_add_ack(mp, datahandle) < 0) {
565 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
566
567 spin_lock_bh(&mp->outlock);
568 __skb_queue_head(&mp->outqueue, skb);
569 mp->outbytes += len;
570 spin_unlock_bh(&mp->outlock);
571
572 break;
573 }
574 errcode = capi20_put_message(mp->ap, skb);
575 if (errcode == CAPI_NOERROR) {
576 #ifdef _DEBUG_DATAFLOW
577 printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n",
578 datahandle, len);
579 #endif
580 continue;
581 }
582 capiminor_del_ack(mp, datahandle);
583
584 if (errcode == CAPI_SENDQUEUEFULL) {
585 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
586
587 spin_lock_bh(&mp->outlock);
588 __skb_queue_head(&mp->outqueue, skb);
589 mp->outbytes += len;
590 spin_unlock_bh(&mp->outlock);
591
592 break;
593 }
594
595 /* ups, drop packet */
596 printk(KERN_ERR "capi: put_message = %x\n", errcode);
597 kfree_skb(skb);
598 }
599 tty_kref_put(tty);
600 }
601
602 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
603 /* -------- function called by lower level -------------------------- */
604
605 static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
606 {
607 struct capidev *cdev = ap->private;
608 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
609 struct tty_struct *tty;
610 struct capiminor *mp;
611 u16 datahandle;
612 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
613 struct capincci *np;
614
615 mutex_lock(&cdev->lock);
616
617 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) {
618 u16 info = CAPIMSG_U16(skb->data, 12); // Info field
619 if ((info & 0xff00) == 0)
620 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
621 }
622 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND)
623 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
624
625 if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) {
626 skb_queue_tail(&cdev->recvqueue, skb);
627 wake_up_interruptible(&cdev->recvwait);
628 goto unlock_out;
629 }
630
631 np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data));
632 if (!np) {
633 printk(KERN_ERR "BUG: capi_signal: ncci not found\n");
634 skb_queue_tail(&cdev->recvqueue, skb);
635 wake_up_interruptible(&cdev->recvwait);
636 goto unlock_out;
637 }
638
639 #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
640 skb_queue_tail(&cdev->recvqueue, skb);
641 wake_up_interruptible(&cdev->recvwait);
642
643 #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
644
645 mp = np->minorp;
646 if (!mp) {
647 skb_queue_tail(&cdev->recvqueue, skb);
648 wake_up_interruptible(&cdev->recvwait);
649 goto unlock_out;
650 }
651 if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) {
652 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2);
653 #ifdef _DEBUG_DATAFLOW
654 printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n",
655 datahandle, skb->len-CAPIMSG_LEN(skb->data));
656 #endif
657 skb_queue_tail(&mp->inqueue, skb);
658
659 handle_minor_recv(mp);
660
661 } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) {
662
663 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4);
664 #ifdef _DEBUG_DATAFLOW
665 printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n",
666 datahandle,
667 CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2));
668 #endif
669 kfree_skb(skb);
670 capiminor_del_ack(mp, datahandle);
671 tty = tty_port_tty_get(&mp->port);
672 if (tty) {
673 tty_wakeup(tty);
674 tty_kref_put(tty);
675 }
676 handle_minor_send(mp);
677
678 } else {
679 /* ups, let capi application handle it :-) */
680 skb_queue_tail(&cdev->recvqueue, skb);
681 wake_up_interruptible(&cdev->recvwait);
682 }
683 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
684
685 unlock_out:
686 mutex_unlock(&cdev->lock);
687 }
688
689 /* -------- file_operations for capidev ----------------------------- */
690
691 static ssize_t
692 capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
693 {
694 struct capidev *cdev = file->private_data;
695 struct sk_buff *skb;
696 size_t copied;
697 int err;
698
699 if (!cdev->ap.applid)
700 return -ENODEV;
701
702 skb = skb_dequeue(&cdev->recvqueue);
703 if (!skb) {
704 if (file->f_flags & O_NONBLOCK)
705 return -EAGAIN;
706 err = wait_event_interruptible(cdev->recvwait,
707 (skb = skb_dequeue(&cdev->recvqueue)));
708 if (err)
709 return err;
710 }
711 if (skb->len > count) {
712 skb_queue_head(&cdev->recvqueue, skb);
713 return -EMSGSIZE;
714 }
715 if (copy_to_user(buf, skb->data, skb->len)) {
716 skb_queue_head(&cdev->recvqueue, skb);
717 return -EFAULT;
718 }
719 copied = skb->len;
720
721 kfree_skb(skb);
722
723 return copied;
724 }
725
726 static ssize_t
727 capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
728 {
729 struct capidev *cdev = file->private_data;
730 struct sk_buff *skb;
731 u16 mlen;
732
733 if (!cdev->ap.applid)
734 return -ENODEV;
735
736 skb = alloc_skb(count, GFP_USER);
737 if (!skb)
738 return -ENOMEM;
739
740 if (copy_from_user(skb_put(skb, count), buf, count)) {
741 kfree_skb(skb);
742 return -EFAULT;
743 }
744 mlen = CAPIMSG_LEN(skb->data);
745 if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
746 if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) {
747 kfree_skb(skb);
748 return -EINVAL;
749 }
750 } else {
751 if (mlen != count) {
752 kfree_skb(skb);
753 return -EINVAL;
754 }
755 }
756 CAPIMSG_SETAPPID(skb->data, cdev->ap.applid);
757
758 if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) {
759 mutex_lock(&cdev->lock);
760 capincci_free(cdev, CAPIMSG_NCCI(skb->data));
761 mutex_unlock(&cdev->lock);
762 }
763
764 cdev->errcode = capi20_put_message(&cdev->ap, skb);
765
766 if (cdev->errcode) {
767 kfree_skb(skb);
768 return -EIO;
769 }
770 return count;
771 }
772
773 static unsigned int
774 capi_poll(struct file *file, poll_table * wait)
775 {
776 struct capidev *cdev = file->private_data;
777 unsigned int mask = 0;
778
779 if (!cdev->ap.applid)
780 return POLLERR;
781
782 poll_wait(file, &(cdev->recvwait), wait);
783 mask = POLLOUT | POLLWRNORM;
784 if (!skb_queue_empty(&cdev->recvqueue))
785 mask |= POLLIN | POLLRDNORM;
786 return mask;
787 }
788
789 static int
790 capi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
791 {
792 struct capidev *cdev = file->private_data;
793 capi_ioctl_struct data;
794 int retval = -EINVAL;
795 void __user *argp = (void __user *)arg;
796
797 switch (cmd) {
798 case CAPI_REGISTER:
799 mutex_lock(&cdev->lock);
800
801 if (cdev->ap.applid) {
802 retval = -EEXIST;
803 goto register_out;
804 }
805 if (copy_from_user(&cdev->ap.rparam, argp,
806 sizeof(struct capi_register_params))) {
807 retval = -EFAULT;
808 goto register_out;
809 }
810 cdev->ap.private = cdev;
811 cdev->ap.recv_message = capi_recv_message;
812 cdev->errcode = capi20_register(&cdev->ap);
813 retval = (int)cdev->ap.applid;
814 if (cdev->errcode) {
815 cdev->ap.applid = 0;
816 retval = -EIO;
817 }
818
819 register_out:
820 mutex_unlock(&cdev->lock);
821 return retval;
822
823 case CAPI_GET_VERSION:
824 {
825 if (copy_from_user(&data.contr, argp,
826 sizeof(data.contr)))
827 return -EFAULT;
828 cdev->errcode = capi20_get_version(data.contr, &data.version);
829 if (cdev->errcode)
830 return -EIO;
831 if (copy_to_user(argp, &data.version,
832 sizeof(data.version)))
833 return -EFAULT;
834 }
835 return 0;
836
837 case CAPI_GET_SERIAL:
838 {
839 if (copy_from_user(&data.contr, argp,
840 sizeof(data.contr)))
841 return -EFAULT;
842 cdev->errcode = capi20_get_serial (data.contr, data.serial);
843 if (cdev->errcode)
844 return -EIO;
845 if (copy_to_user(argp, data.serial,
846 sizeof(data.serial)))
847 return -EFAULT;
848 }
849 return 0;
850 case CAPI_GET_PROFILE:
851 {
852 if (copy_from_user(&data.contr, argp,
853 sizeof(data.contr)))
854 return -EFAULT;
855
856 if (data.contr == 0) {
857 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
858 if (cdev->errcode)
859 return -EIO;
860
861 retval = copy_to_user(argp,
862 &data.profile.ncontroller,
863 sizeof(data.profile.ncontroller));
864
865 } else {
866 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
867 if (cdev->errcode)
868 return -EIO;
869
870 retval = copy_to_user(argp, &data.profile,
871 sizeof(data.profile));
872 }
873 if (retval)
874 return -EFAULT;
875 }
876 return 0;
877
878 case CAPI_GET_MANUFACTURER:
879 {
880 if (copy_from_user(&data.contr, argp,
881 sizeof(data.contr)))
882 return -EFAULT;
883 cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer);
884 if (cdev->errcode)
885 return -EIO;
886
887 if (copy_to_user(argp, data.manufacturer,
888 sizeof(data.manufacturer)))
889 return -EFAULT;
890
891 }
892 return 0;
893 case CAPI_GET_ERRCODE:
894 data.errcode = cdev->errcode;
895 cdev->errcode = CAPI_NOERROR;
896 if (arg) {
897 if (copy_to_user(argp, &data.errcode,
898 sizeof(data.errcode)))
899 return -EFAULT;
900 }
901 return data.errcode;
902
903 case CAPI_INSTALLED:
904 if (capi20_isinstalled() == CAPI_NOERROR)
905 return 0;
906 return -ENXIO;
907
908 case CAPI_MANUFACTURER_CMD:
909 {
910 struct capi_manufacturer_cmd mcmd;
911 if (!capable(CAP_SYS_ADMIN))
912 return -EPERM;
913 if (copy_from_user(&mcmd, argp, sizeof(mcmd)))
914 return -EFAULT;
915 return capi20_manufacturer(mcmd.cmd, mcmd.data);
916 }
917 return 0;
918
919 case CAPI_SET_FLAGS:
920 case CAPI_CLR_FLAGS: {
921 unsigned userflags;
922
923 if (copy_from_user(&userflags, argp, sizeof(userflags)))
924 return -EFAULT;
925
926 mutex_lock(&cdev->lock);
927 if (cmd == CAPI_SET_FLAGS)
928 cdev->userflags |= userflags;
929 else
930 cdev->userflags &= ~userflags;
931 mutex_unlock(&cdev->lock);
932 return 0;
933 }
934 case CAPI_GET_FLAGS:
935 if (copy_to_user(argp, &cdev->userflags,
936 sizeof(cdev->userflags)))
937 return -EFAULT;
938 return 0;
939
940 case CAPI_NCCI_OPENCOUNT: {
941 struct capincci *nccip;
942 unsigned ncci;
943 int count = 0;
944
945 if (copy_from_user(&ncci, argp, sizeof(ncci)))
946 return -EFAULT;
947
948 mutex_lock(&cdev->lock);
949 nccip = capincci_find(cdev, (u32)ncci);
950 if (nccip)
951 count = capincci_minor_opencount(nccip);
952 mutex_unlock(&cdev->lock);
953 return count;
954 }
955
956 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
957 case CAPI_NCCI_GETUNIT: {
958 struct capincci *nccip;
959 struct capiminor *mp;
960 unsigned ncci;
961 int unit = -ESRCH;
962
963 if (copy_from_user(&ncci, argp, sizeof(ncci)))
964 return -EFAULT;
965
966 mutex_lock(&cdev->lock);
967 nccip = capincci_find(cdev, (u32)ncci);
968 if (nccip) {
969 mp = nccip->minorp;
970 if (mp)
971 unit = mp->minor;
972 }
973 mutex_unlock(&cdev->lock);
974 return unit;
975 }
976 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
977
978 default:
979 return -EINVAL;
980 }
981 }
982
983 static long
984 capi_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
985 {
986 int ret;
987
988 mutex_lock(&capi_mutex);
989 ret = capi_ioctl(file, cmd, arg);
990 mutex_unlock(&capi_mutex);
991
992 return ret;
993 }
994
995 static int capi_open(struct inode *inode, struct file *file)
996 {
997 struct capidev *cdev;
998
999 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
1000 if (!cdev)
1001 return -ENOMEM;
1002
1003 mutex_init(&cdev->lock);
1004 skb_queue_head_init(&cdev->recvqueue);
1005 init_waitqueue_head(&cdev->recvwait);
1006 INIT_LIST_HEAD(&cdev->nccis);
1007 file->private_data = cdev;
1008
1009 mutex_lock(&capidev_list_lock);
1010 list_add_tail(&cdev->list, &capidev_list);
1011 mutex_unlock(&capidev_list_lock);
1012
1013 return nonseekable_open(inode, file);
1014 }
1015
1016 static int capi_release(struct inode *inode, struct file *file)
1017 {
1018 struct capidev *cdev = file->private_data;
1019
1020 mutex_lock(&capidev_list_lock);
1021 list_del(&cdev->list);
1022 mutex_unlock(&capidev_list_lock);
1023
1024 if (cdev->ap.applid)
1025 capi20_release(&cdev->ap);
1026 skb_queue_purge(&cdev->recvqueue);
1027 capincci_free(cdev, 0xffffffff);
1028
1029 kfree(cdev);
1030 return 0;
1031 }
1032
1033 static const struct file_operations capi_fops =
1034 {
1035 .owner = THIS_MODULE,
1036 .llseek = no_llseek,
1037 .read = capi_read,
1038 .write = capi_write,
1039 .poll = capi_poll,
1040 .unlocked_ioctl = capi_unlocked_ioctl,
1041 .open = capi_open,
1042 .release = capi_release,
1043 };
1044
1045 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1046 /* -------- tty_operations for capincci ----------------------------- */
1047
1048 static int
1049 capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1050 {
1051 int idx = tty->index;
1052 struct capiminor *mp = capiminor_get(idx);
1053 int ret = tty_init_termios(tty);
1054
1055 if (ret == 0) {
1056 tty_driver_kref_get(driver);
1057 tty->count++;
1058 tty->driver_data = mp;
1059 driver->ttys[idx] = tty;
1060 } else
1061 capiminor_put(mp);
1062 return ret;
1063 }
1064
1065 static void capinc_tty_cleanup(struct tty_struct *tty)
1066 {
1067 struct capiminor *mp = tty->driver_data;
1068 tty->driver_data = NULL;
1069 capiminor_put(mp);
1070 }
1071
1072 static int capinc_tty_open(struct tty_struct *tty, struct file *filp)
1073 {
1074 struct capiminor *mp = tty->driver_data;
1075 int err;
1076
1077 err = tty_port_open(&mp->port, tty, filp);
1078 if (err)
1079 return err;
1080
1081 handle_minor_recv(mp);
1082 return 0;
1083 }
1084
1085 static void capinc_tty_close(struct tty_struct *tty, struct file *filp)
1086 {
1087 struct capiminor *mp = tty->driver_data;
1088
1089 tty_port_close(&mp->port, tty, filp);
1090 }
1091
1092 static int capinc_tty_write(struct tty_struct *tty,
1093 const unsigned char *buf, int count)
1094 {
1095 struct capiminor *mp = tty->driver_data;
1096 struct sk_buff *skb;
1097
1098 #ifdef _DEBUG_TTYFUNCS
1099 printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count);
1100 #endif
1101
1102 spin_lock_bh(&mp->outlock);
1103 skb = mp->outskb;
1104 if (skb) {
1105 mp->outskb = NULL;
1106 __skb_queue_tail(&mp->outqueue, skb);
1107 mp->outbytes += skb->len;
1108 }
1109
1110 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC);
1111 if (!skb) {
1112 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
1113 spin_unlock_bh(&mp->outlock);
1114 return -ENOMEM;
1115 }
1116
1117 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1118 memcpy(skb_put(skb, count), buf, count);
1119
1120 __skb_queue_tail(&mp->outqueue, skb);
1121 mp->outbytes += skb->len;
1122 spin_unlock_bh(&mp->outlock);
1123
1124 handle_minor_send(mp);
1125
1126 return count;
1127 }
1128
1129 static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
1130 {
1131 struct capiminor *mp = tty->driver_data;
1132 bool invoke_send = false;
1133 struct sk_buff *skb;
1134 int ret = 1;
1135
1136 #ifdef _DEBUG_TTYFUNCS
1137 printk(KERN_DEBUG "capinc_put_char(%u)\n", ch);
1138 #endif
1139
1140 spin_lock_bh(&mp->outlock);
1141 skb = mp->outskb;
1142 if (skb) {
1143 if (skb_tailroom(skb) > 0) {
1144 *(skb_put(skb, 1)) = ch;
1145 goto unlock_out;
1146 }
1147 mp->outskb = NULL;
1148 __skb_queue_tail(&mp->outqueue, skb);
1149 mp->outbytes += skb->len;
1150 invoke_send = true;
1151 }
1152
1153 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC);
1154 if (skb) {
1155 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1156 *(skb_put(skb, 1)) = ch;
1157 mp->outskb = skb;
1158 } else {
1159 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
1160 ret = 0;
1161 }
1162
1163 unlock_out:
1164 spin_unlock_bh(&mp->outlock);
1165
1166 if (invoke_send)
1167 handle_minor_send(mp);
1168
1169 return ret;
1170 }
1171
1172 static void capinc_tty_flush_chars(struct tty_struct *tty)
1173 {
1174 struct capiminor *mp = tty->driver_data;
1175 struct sk_buff *skb;
1176
1177 #ifdef _DEBUG_TTYFUNCS
1178 printk(KERN_DEBUG "capinc_tty_flush_chars\n");
1179 #endif
1180
1181 spin_lock_bh(&mp->outlock);
1182 skb = mp->outskb;
1183 if (skb) {
1184 mp->outskb = NULL;
1185 __skb_queue_tail(&mp->outqueue, skb);
1186 mp->outbytes += skb->len;
1187 spin_unlock_bh(&mp->outlock);
1188
1189 handle_minor_send(mp);
1190 } else
1191 spin_unlock_bh(&mp->outlock);
1192
1193 handle_minor_recv(mp);
1194 }
1195
1196 static int capinc_tty_write_room(struct tty_struct *tty)
1197 {
1198 struct capiminor *mp = tty->driver_data;
1199 int room;
1200
1201 room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
1202 room *= CAPI_MAX_BLKSIZE;
1203 #ifdef _DEBUG_TTYFUNCS
1204 printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room);
1205 #endif
1206 return room;
1207 }
1208
1209 static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
1210 {
1211 struct capiminor *mp = tty->driver_data;
1212
1213 #ifdef _DEBUG_TTYFUNCS
1214 printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
1215 mp->outbytes, mp->nack,
1216 skb_queue_len(&mp->outqueue),
1217 skb_queue_len(&mp->inqueue));
1218 #endif
1219 return mp->outbytes;
1220 }
1221
1222 static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file,
1223 unsigned int cmd, unsigned long arg)
1224 {
1225 int error = 0;
1226 switch (cmd) {
1227 default:
1228 error = n_tty_ioctl_helper(tty, file, cmd, arg);
1229 break;
1230 }
1231 return error;
1232 }
1233
1234 static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios * old)
1235 {
1236 #ifdef _DEBUG_TTYFUNCS
1237 printk(KERN_DEBUG "capinc_tty_set_termios\n");
1238 #endif
1239 }
1240
1241 static void capinc_tty_throttle(struct tty_struct *tty)
1242 {
1243 struct capiminor *mp = tty->driver_data;
1244 #ifdef _DEBUG_TTYFUNCS
1245 printk(KERN_DEBUG "capinc_tty_throttle\n");
1246 #endif
1247 mp->ttyinstop = 1;
1248 }
1249
1250 static void capinc_tty_unthrottle(struct tty_struct *tty)
1251 {
1252 struct capiminor *mp = tty->driver_data;
1253
1254 #ifdef _DEBUG_TTYFUNCS
1255 printk(KERN_DEBUG "capinc_tty_unthrottle\n");
1256 #endif
1257 mp->ttyinstop = 0;
1258 handle_minor_recv(mp);
1259 }
1260
1261 static void capinc_tty_stop(struct tty_struct *tty)
1262 {
1263 struct capiminor *mp = tty->driver_data;
1264
1265 #ifdef _DEBUG_TTYFUNCS
1266 printk(KERN_DEBUG "capinc_tty_stop\n");
1267 #endif
1268 mp->ttyoutstop = 1;
1269 }
1270
1271 static void capinc_tty_start(struct tty_struct *tty)
1272 {
1273 struct capiminor *mp = tty->driver_data;
1274
1275 #ifdef _DEBUG_TTYFUNCS
1276 printk(KERN_DEBUG "capinc_tty_start\n");
1277 #endif
1278 mp->ttyoutstop = 0;
1279 handle_minor_send(mp);
1280 }
1281
1282 static void capinc_tty_hangup(struct tty_struct *tty)
1283 {
1284 struct capiminor *mp = tty->driver_data;
1285
1286 #ifdef _DEBUG_TTYFUNCS
1287 printk(KERN_DEBUG "capinc_tty_hangup\n");
1288 #endif
1289 tty_port_hangup(&mp->port);
1290 }
1291
1292 static int capinc_tty_break_ctl(struct tty_struct *tty, int state)
1293 {
1294 #ifdef _DEBUG_TTYFUNCS
1295 printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state);
1296 #endif
1297 return 0;
1298 }
1299
1300 static void capinc_tty_flush_buffer(struct tty_struct *tty)
1301 {
1302 #ifdef _DEBUG_TTYFUNCS
1303 printk(KERN_DEBUG "capinc_tty_flush_buffer\n");
1304 #endif
1305 }
1306
1307 static void capinc_tty_set_ldisc(struct tty_struct *tty)
1308 {
1309 #ifdef _DEBUG_TTYFUNCS
1310 printk(KERN_DEBUG "capinc_tty_set_ldisc\n");
1311 #endif
1312 }
1313
1314 static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
1315 {
1316 #ifdef _DEBUG_TTYFUNCS
1317 printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch);
1318 #endif
1319 }
1320
1321 static const struct tty_operations capinc_ops = {
1322 .open = capinc_tty_open,
1323 .close = capinc_tty_close,
1324 .write = capinc_tty_write,
1325 .put_char = capinc_tty_put_char,
1326 .flush_chars = capinc_tty_flush_chars,
1327 .write_room = capinc_tty_write_room,
1328 .chars_in_buffer = capinc_tty_chars_in_buffer,
1329 .ioctl = capinc_tty_ioctl,
1330 .set_termios = capinc_tty_set_termios,
1331 .throttle = capinc_tty_throttle,
1332 .unthrottle = capinc_tty_unthrottle,
1333 .stop = capinc_tty_stop,
1334 .start = capinc_tty_start,
1335 .hangup = capinc_tty_hangup,
1336 .break_ctl = capinc_tty_break_ctl,
1337 .flush_buffer = capinc_tty_flush_buffer,
1338 .set_ldisc = capinc_tty_set_ldisc,
1339 .send_xchar = capinc_tty_send_xchar,
1340 .install = capinc_tty_install,
1341 .cleanup = capinc_tty_cleanup,
1342 };
1343
1344 static int __init capinc_tty_init(void)
1345 {
1346 struct tty_driver *drv;
1347 int err;
1348
1349 if (capi_ttyminors > CAPINC_MAX_PORTS)
1350 capi_ttyminors = CAPINC_MAX_PORTS;
1351 if (capi_ttyminors <= 0)
1352 capi_ttyminors = CAPINC_NR_PORTS;
1353
1354 capiminors = kzalloc(sizeof(struct capi_minor *) * capi_ttyminors,
1355 GFP_KERNEL);
1356 if (!capiminors)
1357 return -ENOMEM;
1358
1359 drv = alloc_tty_driver(capi_ttyminors);
1360 if (!drv) {
1361 kfree(capiminors);
1362 return -ENOMEM;
1363 }
1364 drv->owner = THIS_MODULE;
1365 drv->driver_name = "capi_nc";
1366 drv->name = "capi";
1367 drv->major = 0;
1368 drv->minor_start = 0;
1369 drv->type = TTY_DRIVER_TYPE_SERIAL;
1370 drv->subtype = SERIAL_TYPE_NORMAL;
1371 drv->init_termios = tty_std_termios;
1372 drv->init_termios.c_iflag = ICRNL;
1373 drv->init_termios.c_oflag = OPOST | ONLCR;
1374 drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1375 drv->init_termios.c_lflag = 0;
1376 drv->flags =
1377 TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS |
1378 TTY_DRIVER_DYNAMIC_DEV;
1379 tty_set_operations(drv, &capinc_ops);
1380
1381 err = tty_register_driver(drv);
1382 if (err) {
1383 put_tty_driver(drv);
1384 kfree(capiminors);
1385 printk(KERN_ERR "Couldn't register capi_nc driver\n");
1386 return err;
1387 }
1388 capinc_tty_driver = drv;
1389 return 0;
1390 }
1391
1392 static void __exit capinc_tty_exit(void)
1393 {
1394 tty_unregister_driver(capinc_tty_driver);
1395 put_tty_driver(capinc_tty_driver);
1396 kfree(capiminors);
1397 }
1398
1399 #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
1400
1401 static inline int capinc_tty_init(void)
1402 {
1403 return 0;
1404 }
1405
1406 static inline void capinc_tty_exit(void) { }
1407
1408 #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
1409
1410 /* -------- /proc functions ----------------------------------------- */
1411
1412 /*
1413 * /proc/capi/capi20:
1414 * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
1415 */
1416 static int capi20_proc_show(struct seq_file *m, void *v)
1417 {
1418 struct capidev *cdev;
1419 struct list_head *l;
1420
1421 mutex_lock(&capidev_list_lock);
1422 list_for_each(l, &capidev_list) {
1423 cdev = list_entry(l, struct capidev, list);
1424 seq_printf(m, "0 %d %lu %lu %lu %lu\n",
1425 cdev->ap.applid,
1426 cdev->ap.nrecvctlpkt,
1427 cdev->ap.nrecvdatapkt,
1428 cdev->ap.nsentctlpkt,
1429 cdev->ap.nsentdatapkt);
1430 }
1431 mutex_unlock(&capidev_list_lock);
1432 return 0;
1433 }
1434
1435 static int capi20_proc_open(struct inode *inode, struct file *file)
1436 {
1437 return single_open(file, capi20_proc_show, NULL);
1438 }
1439
1440 static const struct file_operations capi20_proc_fops = {
1441 .owner = THIS_MODULE,
1442 .open = capi20_proc_open,
1443 .read = seq_read,
1444 .llseek = seq_lseek,
1445 .release = single_release,
1446 };
1447
1448 /*
1449 * /proc/capi/capi20ncci:
1450 * applid ncci
1451 */
1452 static int capi20ncci_proc_show(struct seq_file *m, void *v)
1453 {
1454 struct capidev *cdev;
1455 struct capincci *np;
1456
1457 mutex_lock(&capidev_list_lock);
1458 list_for_each_entry(cdev, &capidev_list, list) {
1459 mutex_lock(&cdev->lock);
1460 list_for_each_entry(np, &cdev->nccis, list)
1461 seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci);
1462 mutex_unlock(&cdev->lock);
1463 }
1464 mutex_unlock(&capidev_list_lock);
1465 return 0;
1466 }
1467
1468 static int capi20ncci_proc_open(struct inode *inode, struct file *file)
1469 {
1470 return single_open(file, capi20ncci_proc_show, NULL);
1471 }
1472
1473 static const struct file_operations capi20ncci_proc_fops = {
1474 .owner = THIS_MODULE,
1475 .open = capi20ncci_proc_open,
1476 .read = seq_read,
1477 .llseek = seq_lseek,
1478 .release = single_release,
1479 };
1480
1481 static void __init proc_init(void)
1482 {
1483 proc_create("capi/capi20", 0, NULL, &capi20_proc_fops);
1484 proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops);
1485 }
1486
1487 static void __exit proc_exit(void)
1488 {
1489 remove_proc_entry("capi/capi20", NULL);
1490 remove_proc_entry("capi/capi20ncci", NULL);
1491 }
1492
1493 /* -------- init function and module interface ---------------------- */
1494
1495
1496 static int __init capi_init(void)
1497 {
1498 const char *compileinfo;
1499 int major_ret;
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 device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
1513
1514 if (capinc_tty_init() < 0) {
1515 device_destroy(capi_class, MKDEV(capi_major, 0));
1516 class_destroy(capi_class);
1517 unregister_chrdev(capi_major, "capi20");
1518 return -ENOMEM;
1519 }
1520
1521 proc_init();
1522
1523 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
1524 compileinfo = " (middleware+capifs)";
1525 #elif defined(CONFIG_ISDN_CAPI_MIDDLEWARE)
1526 compileinfo = " (no capifs)";
1527 #else
1528 compileinfo = " (no middleware)";
1529 #endif
1530 printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n",
1531 capi_major, compileinfo);
1532
1533 return 0;
1534 }
1535
1536 static void __exit capi_exit(void)
1537 {
1538 proc_exit();
1539
1540 device_destroy(capi_class, MKDEV(capi_major, 0));
1541 class_destroy(capi_class);
1542 unregister_chrdev(capi_major, "capi20");
1543
1544 capinc_tty_exit();
1545 }
1546
1547 module_init(capi_init);
1548 module_exit(capi_exit);
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