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