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e1000e: cleanup PARENTHESIS_ALIGNMENT checkpatch checks
[linux/fpc-iii.git] / drivers / isdn / capi / capi.c
blob89562a845f6aee86af1bb5bd54f1ceef228eb2c8
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/ppp-ioctl.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 MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
42 MODULE_AUTHOR("Carsten Paeth");
43 MODULE_LICENSE("GPL");
44
45 /* -------- driver information -------------------------------------- */
46
47 static DEFINE_MUTEX(capi_mutex);
48 static struct class *capi_class;
49 static int capi_major = 68; /* allocated */
50
51 module_param_named(major, capi_major, uint, 0);
52
53 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
54 #define CAPINC_NR_PORTS 32
55 #define CAPINC_MAX_PORTS 256
56
57 static int capi_ttyminors = CAPINC_NR_PORTS;
58
59 module_param_named(ttyminors, capi_ttyminors, uint, 0);
60 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
61
62 /* -------- defines ------------------------------------------------- */
63
64 #define CAPINC_MAX_RECVQUEUE 10
65 #define CAPINC_MAX_SENDQUEUE 10
66 #define CAPI_MAX_BLKSIZE 2048
67
68 /* -------- data structures ----------------------------------------- */
69
70 struct capidev;
71 struct capincci;
72 struct capiminor;
73
74 struct ackqueue_entry {
75 struct list_head list;
76 u16 datahandle;
77 };
78
79 struct capiminor {
80 unsigned int minor;
81
82 struct capi20_appl *ap;
83 u32 ncci;
84 atomic_t datahandle;
85 atomic_t msgid;
86
87 struct tty_port port;
88 int ttyinstop;
89 int ttyoutstop;
90
91 struct sk_buff_head inqueue;
92
93 struct sk_buff_head outqueue;
94 int outbytes;
95 struct sk_buff *outskb;
96 spinlock_t outlock;
97
98 /* transmit path */
99 struct list_head ackqueue;
100 int nack;
101 spinlock_t ackqlock;
102 };
103
104 struct capincci {
105 struct list_head list;
106 u32 ncci;
107 struct capidev *cdev;
108 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
109 struct capiminor *minorp;
110 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
111 };
112
113 struct capidev {
114 struct list_head list;
115 struct capi20_appl ap;
116 u16 errcode;
117 unsigned userflags;
118
119 struct sk_buff_head recvqueue;
120 wait_queue_head_t recvwait;
121
122 struct list_head nccis;
123
124 struct mutex lock;
125 };
126
127 /* -------- global variables ---------------------------------------- */
128
129 static DEFINE_MUTEX(capidev_list_lock);
130 static LIST_HEAD(capidev_list);
131
132 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
133
134 static DEFINE_SPINLOCK(capiminors_lock);
135 static struct capiminor **capiminors;
136
137 static struct tty_driver *capinc_tty_driver;
138
139 /* -------- datahandles --------------------------------------------- */
140
141 static int capiminor_add_ack(struct capiminor *mp, u16 datahandle)
142 {
143 struct ackqueue_entry *n;
144
145 n = kmalloc(sizeof(*n), GFP_ATOMIC);
146 if (unlikely(!n)) {
147 printk(KERN_ERR "capi: alloc datahandle failed\n");
148 return -1;
149 }
150 n->datahandle = datahandle;
151 INIT_LIST_HEAD(&n->list);
152 spin_lock_bh(&mp->ackqlock);
153 list_add_tail(&n->list, &mp->ackqueue);
154 mp->nack++;
155 spin_unlock_bh(&mp->ackqlock);
156 return 0;
157 }
158
159 static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
160 {
161 struct ackqueue_entry *p, *tmp;
162
163 spin_lock_bh(&mp->ackqlock);
164 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
165 if (p->datahandle == datahandle) {
166 list_del(&p->list);
167 mp->nack--;
168 spin_unlock_bh(&mp->ackqlock);
169 kfree(p);
170 return 0;
171 }
172 }
173 spin_unlock_bh(&mp->ackqlock);
174 return -1;
175 }
176
177 static void capiminor_del_all_ack(struct capiminor *mp)
178 {
179 struct ackqueue_entry *p, *tmp;
180
181 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
182 list_del(&p->list);
183 kfree(p);
184 mp->nack--;
185 }
186 }
187
188
189 /* -------- struct capiminor ---------------------------------------- */
190
191 static void capiminor_destroy(struct tty_port *port)
192 {
193 struct capiminor *mp = container_of(port, struct capiminor, port);
194
195 kfree_skb(mp->outskb);
196 skb_queue_purge(&mp->inqueue);
197 skb_queue_purge(&mp->outqueue);
198 capiminor_del_all_ack(mp);
199 kfree(mp);
200 }
201
202 static const struct tty_port_operations capiminor_port_ops = {
203 .destruct = capiminor_destroy,
204 };
205
206 static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
207 {
208 struct capiminor *mp;
209 struct device *dev;
210 unsigned int minor;
211
212 mp = kzalloc(sizeof(*mp), GFP_KERNEL);
213 if (!mp) {
214 printk(KERN_ERR "capi: can't alloc capiminor\n");
215 return NULL;
216 }
217
218 mp->ap = ap;
219 mp->ncci = ncci;
220 INIT_LIST_HEAD(&mp->ackqueue);
221 spin_lock_init(&mp->ackqlock);
222
223 skb_queue_head_init(&mp->inqueue);
224 skb_queue_head_init(&mp->outqueue);
225 spin_lock_init(&mp->outlock);
226
227 tty_port_init(&mp->port);
228 mp->port.ops = &capiminor_port_ops;
229
230 /* Allocate the least unused minor number. */
231 spin_lock(&capiminors_lock);
232 for (minor = 0; minor < capi_ttyminors; minor++)
233 if (!capiminors[minor]) {
234 capiminors[minor] = mp;
235 break;
236 }
237 spin_unlock(&capiminors_lock);
238
239 if (minor == capi_ttyminors) {
240 printk(KERN_NOTICE "capi: out of minors\n");
241 goto err_out1;
242 }
243
244 mp->minor = minor;
245
246 dev = tty_port_register_device(&mp->port, capinc_tty_driver, minor,
247 NULL);
248 if (IS_ERR(dev))
249 goto err_out2;
250
251 return mp;
252
253 err_out2:
254 spin_lock(&capiminors_lock);
255 capiminors[minor] = NULL;
256 spin_unlock(&capiminors_lock);
257
258 err_out1:
259 tty_port_put(&mp->port);
260 return NULL;
261 }
262
263 static struct capiminor *capiminor_get(unsigned int minor)
264 {
265 struct capiminor *mp;
266
267 spin_lock(&capiminors_lock);
268 mp = capiminors[minor];
269 if (mp)
270 tty_port_get(&mp->port);
271 spin_unlock(&capiminors_lock);
272
273 return mp;
274 }
275
276 static inline void capiminor_put(struct capiminor *mp)
277 {
278 tty_port_put(&mp->port);
279 }
280
281 static void capiminor_free(struct capiminor *mp)
282 {
283 tty_unregister_device(capinc_tty_driver, mp->minor);
284
285 spin_lock(&capiminors_lock);
286 capiminors[mp->minor] = NULL;
287 spin_unlock(&capiminors_lock);
288
289 capiminor_put(mp);
290 }
291
292 /* -------- struct capincci ----------------------------------------- */
293
294 static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np)
295 {
296 if (cdev->userflags & CAPIFLAG_HIGHJACKING)
297 np->minorp = capiminor_alloc(&cdev->ap, np->ncci);
298 }
299
300 static void capincci_free_minor(struct capincci *np)
301 {
302 struct capiminor *mp = np->minorp;
303 struct tty_struct *tty;
304
305 if (mp) {
306 tty = tty_port_tty_get(&mp->port);
307 if (tty) {
308 tty_vhangup(tty);
309 tty_kref_put(tty);
310 }
311
312 capiminor_free(mp);
313 }
314 }
315
316 static inline unsigned int capincci_minor_opencount(struct capincci *np)
317 {
318 struct capiminor *mp = np->minorp;
319 unsigned int count = 0;
320 struct tty_struct *tty;
321
322 if (mp) {
323 tty = tty_port_tty_get(&mp->port);
324 if (tty) {
325 count = tty->count;
326 tty_kref_put(tty);
327 }
328 }
329 return count;
330 }
331
332 #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
333
334 static inline void
335 capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { }
336 static inline void capincci_free_minor(struct capincci *np) { }
337
338 #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
339
340 static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
341 {
342 struct capincci *np;
343
344 np = kzalloc(sizeof(*np), GFP_KERNEL);
345 if (!np)
346 return NULL;
347 np->ncci = ncci;
348 np->cdev = cdev;
349
350 capincci_alloc_minor(cdev, np);
351
352 list_add_tail(&np->list, &cdev->nccis);
353
354 return np;
355 }
356
357 static void capincci_free(struct capidev *cdev, u32 ncci)
358 {
359 struct capincci *np, *tmp;
360
361 list_for_each_entry_safe(np, tmp, &cdev->nccis, list)
362 if (ncci == 0xffffffff || np->ncci == ncci) {
363 capincci_free_minor(np);
364 list_del(&np->list);
365 kfree(np);
366 }
367 }
368
369 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
370 static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
371 {
372 struct capincci *np;
373
374 list_for_each_entry(np, &cdev->nccis, list)
375 if (np->ncci == ncci)
376 return np;
377 return NULL;
378 }
379
380 /* -------- handle data queue --------------------------------------- */
381
382 static struct sk_buff *
383 gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb)
384 {
385 struct sk_buff *nskb;
386 nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_KERNEL);
387 if (nskb) {
388 u16 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2);
389 unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN);
390 capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN);
391 capimsg_setu16(s, 2, mp->ap->applid);
392 capimsg_setu8 (s, 4, CAPI_DATA_B3);
393 capimsg_setu8 (s, 5, CAPI_RESP);
394 capimsg_setu16(s, 6, atomic_inc_return(&mp->msgid));
395 capimsg_setu32(s, 8, mp->ncci);
396 capimsg_setu16(s, 12, datahandle);
397 }
398 return nskb;
399 }
400
401 static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb)
402 {
403 unsigned int datalen = skb->len - CAPIMSG_LEN(skb->data);
404 struct tty_struct *tty;
405 struct sk_buff *nskb;
406 u16 errcode, datahandle;
407 struct tty_ldisc *ld;
408 int ret = -1;
409
410 tty = tty_port_tty_get(&mp->port);
411 if (!tty) {
412 pr_debug("capi: currently no receiver\n");
413 return -1;
414 }
415
416 ld = tty_ldisc_ref(tty);
417 if (!ld) {
418 /* fatal error, do not requeue */
419 ret = 0;
420 kfree_skb(skb);
421 goto deref_tty;
422 }
423
424 if (ld->ops->receive_buf == NULL) {
425 pr_debug("capi: ldisc has no receive_buf function\n");
426 /* fatal error, do not requeue */
427 goto free_skb;
428 }
429 if (mp->ttyinstop) {
430 pr_debug("capi: recv tty throttled\n");
431 goto deref_ldisc;
432 }
433
434 if (tty->receive_room < datalen) {
435 pr_debug("capi: no room in tty\n");
436 goto deref_ldisc;
437 }
438
439 nskb = gen_data_b3_resp_for(mp, skb);
440 if (!nskb) {
441 printk(KERN_ERR "capi: gen_data_b3_resp failed\n");
442 goto deref_ldisc;
443 }
444
445 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4);
446
447 errcode = capi20_put_message(mp->ap, nskb);
448
449 if (errcode == CAPI_NOERROR) {
450 skb_pull(skb, CAPIMSG_LEN(skb->data));
451 pr_debug("capi: DATA_B3_RESP %u len=%d => ldisc\n",
452 datahandle, skb->len);
453 ld->ops->receive_buf(tty, skb->data, NULL, skb->len);
454 } else {
455 printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n",
456 errcode);
457 kfree_skb(nskb);
458
459 if (errcode == CAPI_SENDQUEUEFULL)
460 goto deref_ldisc;
461 }
462
463 free_skb:
464 ret = 0;
465 kfree_skb(skb);
466
467 deref_ldisc:
468 tty_ldisc_deref(ld);
469
470 deref_tty:
471 tty_kref_put(tty);
472 return ret;
473 }
474
475 static void handle_minor_recv(struct capiminor *mp)
476 {
477 struct sk_buff *skb;
478
479 while ((skb = skb_dequeue(&mp->inqueue)) != NULL)
480 if (handle_recv_skb(mp, skb) < 0) {
481 skb_queue_head(&mp->inqueue, skb);
482 return;
483 }
484 }
485
486 static void handle_minor_send(struct capiminor *mp)
487 {
488 struct tty_struct *tty;
489 struct sk_buff *skb;
490 u16 len;
491 u16 errcode;
492 u16 datahandle;
493
494 tty = tty_port_tty_get(&mp->port);
495 if (!tty)
496 return;
497
498 if (mp->ttyoutstop) {
499 pr_debug("capi: send: tty stopped\n");
500 tty_kref_put(tty);
501 return;
502 }
503
504 while (1) {
505 spin_lock_bh(&mp->outlock);
506 skb = __skb_dequeue(&mp->outqueue);
507 if (!skb) {
508 spin_unlock_bh(&mp->outlock);
509 break;
510 }
511 len = (u16)skb->len;
512 mp->outbytes -= len;
513 spin_unlock_bh(&mp->outlock);
514
515 datahandle = atomic_inc_return(&mp->datahandle);
516 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
517 memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
518 capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
519 capimsg_setu16(skb->data, 2, mp->ap->applid);
520 capimsg_setu8 (skb->data, 4, CAPI_DATA_B3);
521 capimsg_setu8 (skb->data, 5, CAPI_REQ);
522 capimsg_setu16(skb->data, 6, atomic_inc_return(&mp->msgid));
523 capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */
524 capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */
525 capimsg_setu16(skb->data, 16, len); /* Data length */
526 capimsg_setu16(skb->data, 18, datahandle);
527 capimsg_setu16(skb->data, 20, 0); /* Flags */
528
529 if (capiminor_add_ack(mp, datahandle) < 0) {
530 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
531
532 spin_lock_bh(&mp->outlock);
533 __skb_queue_head(&mp->outqueue, skb);
534 mp->outbytes += len;
535 spin_unlock_bh(&mp->outlock);
536
537 break;
538 }
539 errcode = capi20_put_message(mp->ap, skb);
540 if (errcode == CAPI_NOERROR) {
541 pr_debug("capi: DATA_B3_REQ %u len=%u\n",
542 datahandle, len);
543 continue;
544 }
545 capiminor_del_ack(mp, datahandle);
546
547 if (errcode == CAPI_SENDQUEUEFULL) {
548 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
549
550 spin_lock_bh(&mp->outlock);
551 __skb_queue_head(&mp->outqueue, skb);
552 mp->outbytes += len;
553 spin_unlock_bh(&mp->outlock);
554
555 break;
556 }
557
558 /* ups, drop packet */
559 printk(KERN_ERR "capi: put_message = %x\n", errcode);
560 kfree_skb(skb);
561 }
562 tty_kref_put(tty);
563 }
564
565 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
566 /* -------- function called by lower level -------------------------- */
567
568 static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
569 {
570 struct capidev *cdev = ap->private;
571 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
572 struct tty_struct *tty;
573 struct capiminor *mp;
574 u16 datahandle;
575 struct capincci *np;
576 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
577
578 mutex_lock(&cdev->lock);
579
580 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) {
581 u16 info = CAPIMSG_U16(skb->data, 12); // Info field
582 if ((info & 0xff00) == 0)
583 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
584 }
585 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND)
586 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
587
588 if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) {
589 skb_queue_tail(&cdev->recvqueue, skb);
590 wake_up_interruptible(&cdev->recvwait);
591 goto unlock_out;
592 }
593
594 #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
595 skb_queue_tail(&cdev->recvqueue, skb);
596 wake_up_interruptible(&cdev->recvwait);
597
598 #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
599
600 np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data));
601 if (!np) {
602 printk(KERN_ERR "BUG: capi_signal: ncci not found\n");
603 skb_queue_tail(&cdev->recvqueue, skb);
604 wake_up_interruptible(&cdev->recvwait);
605 goto unlock_out;
606 }
607
608 mp = np->minorp;
609 if (!mp) {
610 skb_queue_tail(&cdev->recvqueue, skb);
611 wake_up_interruptible(&cdev->recvwait);
612 goto unlock_out;
613 }
614 if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) {
615 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2);
616 pr_debug("capi_signal: DATA_B3_IND %u len=%d\n",
617 datahandle, skb->len-CAPIMSG_LEN(skb->data));
618 skb_queue_tail(&mp->inqueue, skb);
619
620 handle_minor_recv(mp);
621
622 } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) {
623
624 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4);
625 pr_debug("capi_signal: DATA_B3_CONF %u 0x%x\n",
626 datahandle,
627 CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 2));
628 kfree_skb(skb);
629 capiminor_del_ack(mp, datahandle);
630 tty = tty_port_tty_get(&mp->port);
631 if (tty) {
632 tty_wakeup(tty);
633 tty_kref_put(tty);
634 }
635 handle_minor_send(mp);
636
637 } else {
638 /* ups, let capi application handle it :-) */
639 skb_queue_tail(&cdev->recvqueue, skb);
640 wake_up_interruptible(&cdev->recvwait);
641 }
642 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
643
644 unlock_out:
645 mutex_unlock(&cdev->lock);
646 }
647
648 /* -------- file_operations for capidev ----------------------------- */
649
650 static ssize_t
651 capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
652 {
653 struct capidev *cdev = file->private_data;
654 struct sk_buff *skb;
655 size_t copied;
656 int err;
657
658 if (!cdev->ap.applid)
659 return -ENODEV;
660
661 skb = skb_dequeue(&cdev->recvqueue);
662 if (!skb) {
663 if (file->f_flags & O_NONBLOCK)
664 return -EAGAIN;
665 err = wait_event_interruptible(cdev->recvwait,
666 (skb = skb_dequeue(&cdev->recvqueue)));
667 if (err)
668 return err;
669 }
670 if (skb->len > count) {
671 skb_queue_head(&cdev->recvqueue, skb);
672 return -EMSGSIZE;
673 }
674 if (copy_to_user(buf, skb->data, skb->len)) {
675 skb_queue_head(&cdev->recvqueue, skb);
676 return -EFAULT;
677 }
678 copied = skb->len;
679
680 kfree_skb(skb);
681
682 return copied;
683 }
684
685 static ssize_t
686 capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
687 {
688 struct capidev *cdev = file->private_data;
689 struct sk_buff *skb;
690 u16 mlen;
691
692 if (!cdev->ap.applid)
693 return -ENODEV;
694
695 skb = alloc_skb(count, GFP_USER);
696 if (!skb)
697 return -ENOMEM;
698
699 if (copy_from_user(skb_put(skb, count), buf, count)) {
700 kfree_skb(skb);
701 return -EFAULT;
702 }
703 mlen = CAPIMSG_LEN(skb->data);
704 if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
705 if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) {
706 kfree_skb(skb);
707 return -EINVAL;
708 }
709 } else {
710 if (mlen != count) {
711 kfree_skb(skb);
712 return -EINVAL;
713 }
714 }
715 CAPIMSG_SETAPPID(skb->data, cdev->ap.applid);
716
717 if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) {
718 mutex_lock(&cdev->lock);
719 capincci_free(cdev, CAPIMSG_NCCI(skb->data));
720 mutex_unlock(&cdev->lock);
721 }
722
723 cdev->errcode = capi20_put_message(&cdev->ap, skb);
724
725 if (cdev->errcode) {
726 kfree_skb(skb);
727 return -EIO;
728 }
729 return count;
730 }
731
732 static unsigned int
733 capi_poll(struct file *file, poll_table *wait)
734 {
735 struct capidev *cdev = file->private_data;
736 unsigned int mask = 0;
737
738 if (!cdev->ap.applid)
739 return POLLERR;
740
741 poll_wait(file, &(cdev->recvwait), wait);
742 mask = POLLOUT | POLLWRNORM;
743 if (!skb_queue_empty(&cdev->recvqueue))
744 mask |= POLLIN | POLLRDNORM;
745 return mask;
746 }
747
748 static int
749 capi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
750 {
751 struct capidev *cdev = file->private_data;
752 capi_ioctl_struct data;
753 int retval = -EINVAL;
754 void __user *argp = (void __user *)arg;
755
756 switch (cmd) {
757 case CAPI_REGISTER:
758 mutex_lock(&cdev->lock);
759
760 if (cdev->ap.applid) {
761 retval = -EEXIST;
762 goto register_out;
763 }
764 if (copy_from_user(&cdev->ap.rparam, argp,
765 sizeof(struct capi_register_params))) {
766 retval = -EFAULT;
767 goto register_out;
768 }
769 cdev->ap.private = cdev;
770 cdev->ap.recv_message = capi_recv_message;
771 cdev->errcode = capi20_register(&cdev->ap);
772 retval = (int)cdev->ap.applid;
773 if (cdev->errcode) {
774 cdev->ap.applid = 0;
775 retval = -EIO;
776 }
777
778 register_out:
779 mutex_unlock(&cdev->lock);
780 return retval;
781
782 case CAPI_GET_VERSION:
783 if (copy_from_user(&data.contr, argp,
784 sizeof(data.contr)))
785 return -EFAULT;
786 cdev->errcode = capi20_get_version(data.contr, &data.version);
787 if (cdev->errcode)
788 return -EIO;
789 if (copy_to_user(argp, &data.version,
790 sizeof(data.version)))
791 return -EFAULT;
792 return 0;
793
794 case CAPI_GET_SERIAL:
795 if (copy_from_user(&data.contr, argp,
796 sizeof(data.contr)))
797 return -EFAULT;
798 cdev->errcode = capi20_get_serial(data.contr, data.serial);
799 if (cdev->errcode)
800 return -EIO;
801 if (copy_to_user(argp, data.serial,
802 sizeof(data.serial)))
803 return -EFAULT;
804 return 0;
805
806 case CAPI_GET_PROFILE:
807 if (copy_from_user(&data.contr, argp,
808 sizeof(data.contr)))
809 return -EFAULT;
810
811 if (data.contr == 0) {
812 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
813 if (cdev->errcode)
814 return -EIO;
815
816 retval = copy_to_user(argp,
817 &data.profile.ncontroller,
818 sizeof(data.profile.ncontroller));
819
820 } else {
821 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
822 if (cdev->errcode)
823 return -EIO;
824
825 retval = copy_to_user(argp, &data.profile,
826 sizeof(data.profile));
827 }
828 if (retval)
829 return -EFAULT;
830 return 0;
831
832 case CAPI_GET_MANUFACTURER:
833 if (copy_from_user(&data.contr, argp,
834 sizeof(data.contr)))
835 return -EFAULT;
836 cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer);
837 if (cdev->errcode)
838 return -EIO;
839
840 if (copy_to_user(argp, data.manufacturer,
841 sizeof(data.manufacturer)))
842 return -EFAULT;
843
844 return 0;
845
846 case CAPI_GET_ERRCODE:
847 data.errcode = cdev->errcode;
848 cdev->errcode = CAPI_NOERROR;
849 if (arg) {
850 if (copy_to_user(argp, &data.errcode,
851 sizeof(data.errcode)))
852 return -EFAULT;
853 }
854 return data.errcode;
855
856 case CAPI_INSTALLED:
857 if (capi20_isinstalled() == CAPI_NOERROR)
858 return 0;
859 return -ENXIO;
860
861 case CAPI_MANUFACTURER_CMD: {
862 struct capi_manufacturer_cmd mcmd;
863 if (!capable(CAP_SYS_ADMIN))
864 return -EPERM;
865 if (copy_from_user(&mcmd, argp, sizeof(mcmd)))
866 return -EFAULT;
867 return capi20_manufacturer(mcmd.cmd, mcmd.data);
868 }
869 case CAPI_SET_FLAGS:
870 case CAPI_CLR_FLAGS: {
871 unsigned userflags;
872
873 if (copy_from_user(&userflags, argp, sizeof(userflags)))
874 return -EFAULT;
875
876 mutex_lock(&cdev->lock);
877 if (cmd == CAPI_SET_FLAGS)
878 cdev->userflags |= userflags;
879 else
880 cdev->userflags &= ~userflags;
881 mutex_unlock(&cdev->lock);
882 return 0;
883 }
884 case CAPI_GET_FLAGS:
885 if (copy_to_user(argp, &cdev->userflags,
886 sizeof(cdev->userflags)))
887 return -EFAULT;
888 return 0;
889
890 #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
891 case CAPI_NCCI_OPENCOUNT:
892 return 0;
893
894 #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
895 case CAPI_NCCI_OPENCOUNT: {
896 struct capincci *nccip;
897 unsigned ncci;
898 int count = 0;
899
900 if (copy_from_user(&ncci, argp, sizeof(ncci)))
901 return -EFAULT;
902
903 mutex_lock(&cdev->lock);
904 nccip = capincci_find(cdev, (u32)ncci);
905 if (nccip)
906 count = capincci_minor_opencount(nccip);
907 mutex_unlock(&cdev->lock);
908 return count;
909 }
910
911 case CAPI_NCCI_GETUNIT: {
912 struct capincci *nccip;
913 struct capiminor *mp;
914 unsigned ncci;
915 int unit = -ESRCH;
916
917 if (copy_from_user(&ncci, argp, sizeof(ncci)))
918 return -EFAULT;
919
920 mutex_lock(&cdev->lock);
921 nccip = capincci_find(cdev, (u32)ncci);
922 if (nccip) {
923 mp = nccip->minorp;
924 if (mp)
925 unit = mp->minor;
926 }
927 mutex_unlock(&cdev->lock);
928 return unit;
929 }
930 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
931
932 default:
933 return -EINVAL;
934 }
935 }
936
937 static long
938 capi_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
939 {
940 int ret;
941
942 mutex_lock(&capi_mutex);
943 ret = capi_ioctl(file, cmd, arg);
944 mutex_unlock(&capi_mutex);
945
946 return ret;
947 }
948
949 static int capi_open(struct inode *inode, struct file *file)
950 {
951 struct capidev *cdev;
952
953 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
954 if (!cdev)
955 return -ENOMEM;
956
957 mutex_init(&cdev->lock);
958 skb_queue_head_init(&cdev->recvqueue);
959 init_waitqueue_head(&cdev->recvwait);
960 INIT_LIST_HEAD(&cdev->nccis);
961 file->private_data = cdev;
962
963 mutex_lock(&capidev_list_lock);
964 list_add_tail(&cdev->list, &capidev_list);
965 mutex_unlock(&capidev_list_lock);
966
967 return nonseekable_open(inode, file);
968 }
969
970 static int capi_release(struct inode *inode, struct file *file)
971 {
972 struct capidev *cdev = file->private_data;
973
974 mutex_lock(&capidev_list_lock);
975 list_del(&cdev->list);
976 mutex_unlock(&capidev_list_lock);
977
978 if (cdev->ap.applid)
979 capi20_release(&cdev->ap);
980 skb_queue_purge(&cdev->recvqueue);
981 capincci_free(cdev, 0xffffffff);
982
983 kfree(cdev);
984 return 0;
985 }
986
987 static const struct file_operations capi_fops =
988 {
989 .owner = THIS_MODULE,
990 .llseek = no_llseek,
991 .read = capi_read,
992 .write = capi_write,
993 .poll = capi_poll,
994 .unlocked_ioctl = capi_unlocked_ioctl,
995 .open = capi_open,
996 .release = capi_release,
997 };
998
999 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1000 /* -------- tty_operations for capincci ----------------------------- */
1001
1002 static int
1003 capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1004 {
1005 struct capiminor *mp = capiminor_get(tty->index);
1006 int ret = tty_standard_install(driver, tty);
1007
1008 if (ret == 0)
1009 tty->driver_data = mp;
1010 else
1011 capiminor_put(mp);
1012 return ret;
1013 }
1014
1015 static void capinc_tty_cleanup(struct tty_struct *tty)
1016 {
1017 struct capiminor *mp = tty->driver_data;
1018 tty->driver_data = NULL;
1019 capiminor_put(mp);
1020 }
1021
1022 static int capinc_tty_open(struct tty_struct *tty, struct file *filp)
1023 {
1024 struct capiminor *mp = tty->driver_data;
1025 int err;
1026
1027 err = tty_port_open(&mp->port, tty, filp);
1028 if (err)
1029 return err;
1030
1031 handle_minor_recv(mp);
1032 return 0;
1033 }
1034
1035 static void capinc_tty_close(struct tty_struct *tty, struct file *filp)
1036 {
1037 struct capiminor *mp = tty->driver_data;
1038
1039 tty_port_close(&mp->port, tty, filp);
1040 }
1041
1042 static int capinc_tty_write(struct tty_struct *tty,
1043 const unsigned char *buf, int count)
1044 {
1045 struct capiminor *mp = tty->driver_data;
1046 struct sk_buff *skb;
1047
1048 pr_debug("capinc_tty_write(count=%d)\n", count);
1049
1050 spin_lock_bh(&mp->outlock);
1051 skb = mp->outskb;
1052 if (skb) {
1053 mp->outskb = NULL;
1054 __skb_queue_tail(&mp->outqueue, skb);
1055 mp->outbytes += skb->len;
1056 }
1057
1058 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + count, GFP_ATOMIC);
1059 if (!skb) {
1060 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
1061 spin_unlock_bh(&mp->outlock);
1062 return -ENOMEM;
1063 }
1064
1065 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1066 memcpy(skb_put(skb, count), buf, count);
1067
1068 __skb_queue_tail(&mp->outqueue, skb);
1069 mp->outbytes += skb->len;
1070 spin_unlock_bh(&mp->outlock);
1071
1072 handle_minor_send(mp);
1073
1074 return count;
1075 }
1076
1077 static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
1078 {
1079 struct capiminor *mp = tty->driver_data;
1080 bool invoke_send = false;
1081 struct sk_buff *skb;
1082 int ret = 1;
1083
1084 pr_debug("capinc_put_char(%u)\n", ch);
1085
1086 spin_lock_bh(&mp->outlock);
1087 skb = mp->outskb;
1088 if (skb) {
1089 if (skb_tailroom(skb) > 0) {
1090 *(skb_put(skb, 1)) = ch;
1091 goto unlock_out;
1092 }
1093 mp->outskb = NULL;
1094 __skb_queue_tail(&mp->outqueue, skb);
1095 mp->outbytes += skb->len;
1096 invoke_send = true;
1097 }
1098
1099 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + CAPI_MAX_BLKSIZE, GFP_ATOMIC);
1100 if (skb) {
1101 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1102 *(skb_put(skb, 1)) = ch;
1103 mp->outskb = skb;
1104 } else {
1105 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
1106 ret = 0;
1107 }
1108
1109 unlock_out:
1110 spin_unlock_bh(&mp->outlock);
1111
1112 if (invoke_send)
1113 handle_minor_send(mp);
1114
1115 return ret;
1116 }
1117
1118 static void capinc_tty_flush_chars(struct tty_struct *tty)
1119 {
1120 struct capiminor *mp = tty->driver_data;
1121 struct sk_buff *skb;
1122
1123 pr_debug("capinc_tty_flush_chars\n");
1124
1125 spin_lock_bh(&mp->outlock);
1126 skb = mp->outskb;
1127 if (skb) {
1128 mp->outskb = NULL;
1129 __skb_queue_tail(&mp->outqueue, skb);
1130 mp->outbytes += skb->len;
1131 spin_unlock_bh(&mp->outlock);
1132
1133 handle_minor_send(mp);
1134 } else
1135 spin_unlock_bh(&mp->outlock);
1136
1137 handle_minor_recv(mp);
1138 }
1139
1140 static int capinc_tty_write_room(struct tty_struct *tty)
1141 {
1142 struct capiminor *mp = tty->driver_data;
1143 int room;
1144
1145 room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
1146 room *= CAPI_MAX_BLKSIZE;
1147 pr_debug("capinc_tty_write_room = %d\n", room);
1148 return room;
1149 }
1150
1151 static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
1152 {
1153 struct capiminor *mp = tty->driver_data;
1154
1155 pr_debug("capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
1156 mp->outbytes, mp->nack,
1157 skb_queue_len(&mp->outqueue),
1158 skb_queue_len(&mp->inqueue));
1159 return mp->outbytes;
1160 }
1161
1162 static int capinc_tty_ioctl(struct tty_struct *tty,
1163 unsigned int cmd, unsigned long arg)
1164 {
1165 return -ENOIOCTLCMD;
1166 }
1167
1168 static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
1169 {
1170 pr_debug("capinc_tty_set_termios\n");
1171 }
1172
1173 static void capinc_tty_throttle(struct tty_struct *tty)
1174 {
1175 struct capiminor *mp = tty->driver_data;
1176 pr_debug("capinc_tty_throttle\n");
1177 mp->ttyinstop = 1;
1178 }
1179
1180 static void capinc_tty_unthrottle(struct tty_struct *tty)
1181 {
1182 struct capiminor *mp = tty->driver_data;
1183
1184 pr_debug("capinc_tty_unthrottle\n");
1185 mp->ttyinstop = 0;
1186 handle_minor_recv(mp);
1187 }
1188
1189 static void capinc_tty_stop(struct tty_struct *tty)
1190 {
1191 struct capiminor *mp = tty->driver_data;
1192
1193 pr_debug("capinc_tty_stop\n");
1194 mp->ttyoutstop = 1;
1195 }
1196
1197 static void capinc_tty_start(struct tty_struct *tty)
1198 {
1199 struct capiminor *mp = tty->driver_data;
1200
1201 pr_debug("capinc_tty_start\n");
1202 mp->ttyoutstop = 0;
1203 handle_minor_send(mp);
1204 }
1205
1206 static void capinc_tty_hangup(struct tty_struct *tty)
1207 {
1208 struct capiminor *mp = tty->driver_data;
1209
1210 pr_debug("capinc_tty_hangup\n");
1211 tty_port_hangup(&mp->port);
1212 }
1213
1214 static int capinc_tty_break_ctl(struct tty_struct *tty, int state)
1215 {
1216 pr_debug("capinc_tty_break_ctl(%d)\n", state);
1217 return 0;
1218 }
1219
1220 static void capinc_tty_flush_buffer(struct tty_struct *tty)
1221 {
1222 pr_debug("capinc_tty_flush_buffer\n");
1223 }
1224
1225 static void capinc_tty_set_ldisc(struct tty_struct *tty)
1226 {
1227 pr_debug("capinc_tty_set_ldisc\n");
1228 }
1229
1230 static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
1231 {
1232 pr_debug("capinc_tty_send_xchar(%d)\n", ch);
1233 }
1234
1235 static const struct tty_operations capinc_ops = {
1236 .open = capinc_tty_open,
1237 .close = capinc_tty_close,
1238 .write = capinc_tty_write,
1239 .put_char = capinc_tty_put_char,
1240 .flush_chars = capinc_tty_flush_chars,
1241 .write_room = capinc_tty_write_room,
1242 .chars_in_buffer = capinc_tty_chars_in_buffer,
1243 .ioctl = capinc_tty_ioctl,
1244 .set_termios = capinc_tty_set_termios,
1245 .throttle = capinc_tty_throttle,
1246 .unthrottle = capinc_tty_unthrottle,
1247 .stop = capinc_tty_stop,
1248 .start = capinc_tty_start,
1249 .hangup = capinc_tty_hangup,
1250 .break_ctl = capinc_tty_break_ctl,
1251 .flush_buffer = capinc_tty_flush_buffer,
1252 .set_ldisc = capinc_tty_set_ldisc,
1253 .send_xchar = capinc_tty_send_xchar,
1254 .install = capinc_tty_install,
1255 .cleanup = capinc_tty_cleanup,
1256 };
1257
1258 static int __init capinc_tty_init(void)
1259 {
1260 struct tty_driver *drv;
1261 int err;
1262
1263 if (capi_ttyminors > CAPINC_MAX_PORTS)
1264 capi_ttyminors = CAPINC_MAX_PORTS;
1265 if (capi_ttyminors <= 0)
1266 capi_ttyminors = CAPINC_NR_PORTS;
1267
1268 capiminors = kzalloc(sizeof(struct capi_minor *) * capi_ttyminors,
1269 GFP_KERNEL);
1270 if (!capiminors)
1271 return -ENOMEM;
1272
1273 drv = alloc_tty_driver(capi_ttyminors);
1274 if (!drv) {
1275 kfree(capiminors);
1276 return -ENOMEM;
1277 }
1278 drv->driver_name = "capi_nc";
1279 drv->name = "capi";
1280 drv->major = 0;
1281 drv->minor_start = 0;
1282 drv->type = TTY_DRIVER_TYPE_SERIAL;
1283 drv->subtype = SERIAL_TYPE_NORMAL;
1284 drv->init_termios = tty_std_termios;
1285 drv->init_termios.c_iflag = ICRNL;
1286 drv->init_termios.c_oflag = OPOST | ONLCR;
1287 drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1288 drv->init_termios.c_lflag = 0;
1289 drv->flags =
1290 TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS |
1291 TTY_DRIVER_DYNAMIC_DEV;
1292 tty_set_operations(drv, &capinc_ops);
1293
1294 err = tty_register_driver(drv);
1295 if (err) {
1296 put_tty_driver(drv);
1297 kfree(capiminors);
1298 printk(KERN_ERR "Couldn't register capi_nc driver\n");
1299 return err;
1300 }
1301 capinc_tty_driver = drv;
1302 return 0;
1303 }
1304
1305 static void __exit capinc_tty_exit(void)
1306 {
1307 tty_unregister_driver(capinc_tty_driver);
1308 put_tty_driver(capinc_tty_driver);
1309 kfree(capiminors);
1310 }
1311
1312 #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
1313
1314 static inline int capinc_tty_init(void)
1315 {
1316 return 0;
1317 }
1318
1319 static inline void capinc_tty_exit(void) { }
1320
1321 #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */
1322
1323 /* -------- /proc functions ----------------------------------------- */
1324
1325 /*
1326 * /proc/capi/capi20:
1327 * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
1328 */
1329 static int capi20_proc_show(struct seq_file *m, void *v)
1330 {
1331 struct capidev *cdev;
1332 struct list_head *l;
1333
1334 mutex_lock(&capidev_list_lock);
1335 list_for_each(l, &capidev_list) {
1336 cdev = list_entry(l, struct capidev, list);
1337 seq_printf(m, "0 %d %lu %lu %lu %lu\n",
1338 cdev->ap.applid,
1339 cdev->ap.nrecvctlpkt,
1340 cdev->ap.nrecvdatapkt,
1341 cdev->ap.nsentctlpkt,
1342 cdev->ap.nsentdatapkt);
1343 }
1344 mutex_unlock(&capidev_list_lock);
1345 return 0;
1346 }
1347
1348 static int capi20_proc_open(struct inode *inode, struct file *file)
1349 {
1350 return single_open(file, capi20_proc_show, NULL);
1351 }
1352
1353 static const struct file_operations capi20_proc_fops = {
1354 .owner = THIS_MODULE,
1355 .open = capi20_proc_open,
1356 .read = seq_read,
1357 .llseek = seq_lseek,
1358 .release = single_release,
1359 };
1360
1361 /*
1362 * /proc/capi/capi20ncci:
1363 * applid ncci
1364 */
1365 static int capi20ncci_proc_show(struct seq_file *m, void *v)
1366 {
1367 struct capidev *cdev;
1368 struct capincci *np;
1369
1370 mutex_lock(&capidev_list_lock);
1371 list_for_each_entry(cdev, &capidev_list, list) {
1372 mutex_lock(&cdev->lock);
1373 list_for_each_entry(np, &cdev->nccis, list)
1374 seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci);
1375 mutex_unlock(&cdev->lock);
1376 }
1377 mutex_unlock(&capidev_list_lock);
1378 return 0;
1379 }
1380
1381 static int capi20ncci_proc_open(struct inode *inode, struct file *file)
1382 {
1383 return single_open(file, capi20ncci_proc_show, NULL);
1384 }
1385
1386 static const struct file_operations capi20ncci_proc_fops = {
1387 .owner = THIS_MODULE,
1388 .open = capi20ncci_proc_open,
1389 .read = seq_read,
1390 .llseek = seq_lseek,
1391 .release = single_release,
1392 };
1393
1394 static void __init proc_init(void)
1395 {
1396 proc_create("capi/capi20", 0, NULL, &capi20_proc_fops);
1397 proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops);
1398 }
1399
1400 static void __exit proc_exit(void)
1401 {
1402 remove_proc_entry("capi/capi20", NULL);
1403 remove_proc_entry("capi/capi20ncci", NULL);
1404 }
1405
1406 /* -------- init function and module interface ---------------------- */
1407
1408
1409 static int __init capi_init(void)
1410 {
1411 const char *compileinfo;
1412 int major_ret;
1413
1414 major_ret = register_chrdev(capi_major, "capi20", &capi_fops);
1415 if (major_ret < 0) {
1416 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
1417 return major_ret;
1418 }
1419 capi_class = class_create(THIS_MODULE, "capi");
1420 if (IS_ERR(capi_class)) {
1421 unregister_chrdev(capi_major, "capi20");
1422 return PTR_ERR(capi_class);
1423 }
1424
1425 device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
1426
1427 if (capinc_tty_init() < 0) {
1428 device_destroy(capi_class, MKDEV(capi_major, 0));
1429 class_destroy(capi_class);
1430 unregister_chrdev(capi_major, "capi20");
1431 return -ENOMEM;
1432 }
1433
1434 proc_init();
1435
1436 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1437 compileinfo = " (middleware)";
1438 #else
1439 compileinfo = " (no middleware)";
1440 #endif
1441 printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n",
1442 capi_major, compileinfo);
1443
1444 return 0;
1445 }
1446
1447 static void __exit capi_exit(void)
1448 {
1449 proc_exit();
1450
1451 device_destroy(capi_class, MKDEV(capi_major, 0));
1452 class_destroy(capi_class);
1453 unregister_chrdev(capi_major, "capi20");
1454
1455 capinc_tty_exit();
1456 }
1457
1458 module_init(capi_init);
1459 module_exit(capi_exit);
Linux with added FPC-III support