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Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/devfs-2.6
[deliverable/linux.git] / drivers / isdn / capi / capi.c
1 /* $Id: capi.c,v 1.1.2.7 2004/04/28 09:48:59 armin Exp $
2 *
3 * CAPI 2.0 Interface for Linux
4 *
5 * Copyright 1996 by Carsten Paeth <calle@calle.de>
6 *
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
9 *
10 */
11
12 #include <linux/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/isdn/capiutil.h>
43 #include <linux/isdn/capicmd.h>
44 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
45 #include "capifs.h"
46 #endif
47
48 static char *revision = "$Revision: 1.1.2.7 $";
49
50 MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
51 MODULE_AUTHOR("Carsten Paeth");
52 MODULE_LICENSE("GPL");
53
54 #undef _DEBUG_REFCOUNT /* alloc/free and open/close debug */
55 #undef _DEBUG_TTYFUNCS /* call to tty_driver */
56 #undef _DEBUG_DATAFLOW /* data flow */
57
58 /* -------- driver information -------------------------------------- */
59
60 static struct class *capi_class;
61
62 static int capi_major = 68; /* allocated */
63 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
64 #define CAPINC_NR_PORTS 32
65 #define CAPINC_MAX_PORTS 256
66 static int capi_ttymajor = 191;
67 static int capi_ttyminors = CAPINC_NR_PORTS;
68 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
69
70 module_param_named(major, capi_major, uint, 0);
71 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
72 module_param_named(ttymajor, capi_ttymajor, uint, 0);
73 module_param_named(ttyminors, capi_ttyminors, uint, 0);
74 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
75
76 /* -------- defines ------------------------------------------------- */
77
78 #define CAPINC_MAX_RECVQUEUE 10
79 #define CAPINC_MAX_SENDQUEUE 10
80 #define CAPI_MAX_BLKSIZE 2048
81
82 /* -------- data structures ----------------------------------------- */
83
84 struct capidev;
85 struct capincci;
86 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
87 struct capiminor;
88
89 struct datahandle_queue {
90 struct list_head list;
91 u16 datahandle;
92 };
93
94 struct capiminor {
95 struct list_head list;
96 struct capincci *nccip;
97 unsigned int minor;
98
99 struct capi20_appl *ap;
100 u32 ncci;
101 u16 datahandle;
102 u16 msgid;
103
104 struct tty_struct *tty;
105 int ttyinstop;
106 int ttyoutstop;
107 struct sk_buff *ttyskb;
108 atomic_t ttyopencount;
109
110 struct sk_buff_head inqueue;
111 int inbytes;
112 struct sk_buff_head outqueue;
113 int outbytes;
114
115 /* transmit path */
116 struct list_head ackqueue;
117 int nack;
118 spinlock_t ackqlock;
119 };
120 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
121
122 struct capincci {
123 struct capincci *next;
124 u32 ncci;
125 struct capidev *cdev;
126 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
127 struct capiminor *minorp;
128 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
129 };
130
131 struct capidev {
132 struct list_head list;
133 struct capi20_appl ap;
134 u16 errcode;
135 unsigned userflags;
136
137 struct sk_buff_head recvqueue;
138 wait_queue_head_t recvwait;
139
140 struct capincci *nccis;
141
142 struct semaphore ncci_list_sem;
143 };
144
145 /* -------- global variables ---------------------------------------- */
146
147 static DEFINE_RWLOCK(capidev_list_lock);
148 static LIST_HEAD(capidev_list);
149
150 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
151 static DEFINE_RWLOCK(capiminor_list_lock);
152 static LIST_HEAD(capiminor_list);
153 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
154
155 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
156 /* -------- datahandles --------------------------------------------- */
157
158 static int capincci_add_ack(struct capiminor *mp, u16 datahandle)
159 {
160 struct datahandle_queue *n;
161 unsigned long flags;
162
163 n = kmalloc(sizeof(*n), GFP_ATOMIC);
164 if (unlikely(!n)) {
165 printk(KERN_ERR "capi: alloc datahandle failed\n");
166 return -1;
167 }
168 n->datahandle = datahandle;
169 INIT_LIST_HEAD(&n->list);
170 spin_lock_irqsave(&mp->ackqlock, flags);
171 list_add_tail(&n->list, &mp->ackqueue);
172 mp->nack++;
173 spin_unlock_irqrestore(&mp->ackqlock, flags);
174 return 0;
175 }
176
177 static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
178 {
179 struct datahandle_queue *p, *tmp;
180 unsigned long flags;
181
182 spin_lock_irqsave(&mp->ackqlock, flags);
183 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
184 if (p->datahandle == datahandle) {
185 list_del(&p->list);
186 kfree(p);
187 mp->nack--;
188 spin_unlock_irqrestore(&mp->ackqlock, flags);
189 return 0;
190 }
191 }
192 spin_unlock_irqrestore(&mp->ackqlock, flags);
193 return -1;
194 }
195
196 static void capiminor_del_all_ack(struct capiminor *mp)
197 {
198 struct datahandle_queue *p, *tmp;
199 unsigned long flags;
200
201 spin_lock_irqsave(&mp->ackqlock, flags);
202 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
203 list_del(&p->list);
204 kfree(p);
205 mp->nack--;
206 }
207 spin_unlock_irqrestore(&mp->ackqlock, flags);
208 }
209
210
211 /* -------- struct capiminor ---------------------------------------- */
212
213 static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
214 {
215 struct capiminor *mp, *p;
216 unsigned int minor = 0;
217 unsigned long flags;
218
219 mp = kmalloc(sizeof(*mp), GFP_ATOMIC);
220 if (!mp) {
221 printk(KERN_ERR "capi: can't alloc capiminor\n");
222 return NULL;
223 }
224
225 memset(mp, 0, sizeof(struct capiminor));
226 mp->ap = ap;
227 mp->ncci = ncci;
228 mp->msgid = 0;
229 atomic_set(&mp->ttyopencount,0);
230 INIT_LIST_HEAD(&mp->ackqueue);
231 spin_lock_init(&mp->ackqlock);
232
233 skb_queue_head_init(&mp->inqueue);
234 skb_queue_head_init(&mp->outqueue);
235
236 /* Allocate the least unused minor number.
237 */
238 write_lock_irqsave(&capiminor_list_lock, flags);
239 if (list_empty(&capiminor_list))
240 list_add(&mp->list, &capiminor_list);
241 else {
242 list_for_each_entry(p, &capiminor_list, list) {
243 if (p->minor > minor)
244 break;
245 minor++;
246 }
247
248 if (minor < capi_ttyminors) {
249 mp->minor = minor;
250 list_add(&mp->list, p->list.prev);
251 }
252 }
253 write_unlock_irqrestore(&capiminor_list_lock, flags);
254
255 if (!(minor < capi_ttyminors)) {
256 printk(KERN_NOTICE "capi: out of minors\n");
257 kfree(mp);
258 return NULL;
259 }
260
261 return mp;
262 }
263
264 static void capiminor_free(struct capiminor *mp)
265 {
266 unsigned long flags;
267
268 write_lock_irqsave(&capiminor_list_lock, flags);
269 list_del(&mp->list);
270 write_unlock_irqrestore(&capiminor_list_lock, flags);
271
272 if (mp->ttyskb) kfree_skb(mp->ttyskb);
273 mp->ttyskb = NULL;
274 skb_queue_purge(&mp->inqueue);
275 skb_queue_purge(&mp->outqueue);
276 capiminor_del_all_ack(mp);
277 kfree(mp);
278 }
279
280 static struct capiminor *capiminor_find(unsigned int minor)
281 {
282 struct list_head *l;
283 struct capiminor *p = NULL;
284
285 read_lock(&capiminor_list_lock);
286 list_for_each(l, &capiminor_list) {
287 p = list_entry(l, struct capiminor, list);
288 if (p->minor == minor)
289 break;
290 }
291 read_unlock(&capiminor_list_lock);
292 if (l == &capiminor_list)
293 return NULL;
294
295 return p;
296 }
297 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
298
299 /* -------- struct capincci ----------------------------------------- */
300
301 static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
302 {
303 struct capincci *np, **pp;
304 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
305 struct capiminor *mp = NULL;
306 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
307
308 np = kmalloc(sizeof(*np), GFP_ATOMIC);
309 if (!np)
310 return NULL;
311 memset(np, 0, sizeof(struct capincci));
312 np->ncci = ncci;
313 np->cdev = cdev;
314 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
315 mp = NULL;
316 if (cdev->userflags & CAPIFLAG_HIGHJACKING)
317 mp = np->minorp = capiminor_alloc(&cdev->ap, ncci);
318 if (mp) {
319 mp->nccip = np;
320 #ifdef _DEBUG_REFCOUNT
321 printk(KERN_DEBUG "set mp->nccip\n");
322 #endif
323 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
324 capifs_new_ncci(mp->minor, MKDEV(capi_ttymajor, mp->minor));
325 #endif
326 }
327 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
328 for (pp=&cdev->nccis; *pp; pp = &(*pp)->next)
329 ;
330 *pp = np;
331 return np;
332 }
333
334 static void capincci_free(struct capidev *cdev, u32 ncci)
335 {
336 struct capincci *np, **pp;
337 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
338 struct capiminor *mp;
339 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
340
341 pp=&cdev->nccis;
342 while (*pp) {
343 np = *pp;
344 if (ncci == 0xffffffff || np->ncci == ncci) {
345 *pp = (*pp)->next;
346 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
347 if ((mp = np->minorp) != 0) {
348 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
349 capifs_free_ncci(mp->minor);
350 #endif
351 if (mp->tty) {
352 mp->nccip = NULL;
353 #ifdef _DEBUG_REFCOUNT
354 printk(KERN_DEBUG "reset mp->nccip\n");
355 #endif
356 tty_hangup(mp->tty);
357 } else {
358 capiminor_free(mp);
359 }
360 }
361 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
362 kfree(np);
363 if (*pp == 0) return;
364 } else {
365 pp = &(*pp)->next;
366 }
367 }
368 }
369
370 static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
371 {
372 struct capincci *p;
373
374 for (p=cdev->nccis; p ; p = p->next) {
375 if (p->ncci == ncci)
376 break;
377 }
378 return p;
379 }
380
381 /* -------- struct capidev ------------------------------------------ */
382
383 static struct capidev *capidev_alloc(void)
384 {
385 struct capidev *cdev;
386 unsigned long flags;
387
388 cdev = kmalloc(sizeof(*cdev), GFP_KERNEL);
389 if (!cdev)
390 return NULL;
391 memset(cdev, 0, sizeof(struct capidev));
392
393 init_MUTEX(&cdev->ncci_list_sem);
394 skb_queue_head_init(&cdev->recvqueue);
395 init_waitqueue_head(&cdev->recvwait);
396 write_lock_irqsave(&capidev_list_lock, flags);
397 list_add_tail(&cdev->list, &capidev_list);
398 write_unlock_irqrestore(&capidev_list_lock, flags);
399 return cdev;
400 }
401
402 static void capidev_free(struct capidev *cdev)
403 {
404 unsigned long flags;
405
406 if (cdev->ap.applid) {
407 capi20_release(&cdev->ap);
408 cdev->ap.applid = 0;
409 }
410 skb_queue_purge(&cdev->recvqueue);
411
412 down(&cdev->ncci_list_sem);
413 capincci_free(cdev, 0xffffffff);
414 up(&cdev->ncci_list_sem);
415
416 write_lock_irqsave(&capidev_list_lock, flags);
417 list_del(&cdev->list);
418 write_unlock_irqrestore(&capidev_list_lock, flags);
419 kfree(cdev);
420 }
421
422 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
423 /* -------- handle data queue --------------------------------------- */
424
425 static struct sk_buff *
426 gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb)
427 {
428 struct sk_buff *nskb;
429 nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC);
430 if (nskb) {
431 u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2);
432 unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN);
433 capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN);
434 capimsg_setu16(s, 2, mp->ap->applid);
435 capimsg_setu8 (s, 4, CAPI_DATA_B3);
436 capimsg_setu8 (s, 5, CAPI_RESP);
437 capimsg_setu16(s, 6, mp->msgid++);
438 capimsg_setu32(s, 8, mp->ncci);
439 capimsg_setu16(s, 12, datahandle);
440 }
441 return nskb;
442 }
443
444 static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb)
445 {
446 struct sk_buff *nskb;
447 int datalen;
448 u16 errcode, datahandle;
449 struct tty_ldisc *ld;
450
451 datalen = skb->len - CAPIMSG_LEN(skb->data);
452 if (mp->tty == NULL)
453 {
454 #ifdef _DEBUG_DATAFLOW
455 printk(KERN_DEBUG "capi: currently no receiver\n");
456 #endif
457 return -1;
458 }
459
460 ld = tty_ldisc_ref(mp->tty);
461 if (ld == NULL)
462 return -1;
463 if (ld->receive_buf == NULL) {
464 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
465 printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n");
466 #endif
467 goto bad;
468 }
469 if (mp->ttyinstop) {
470 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
471 printk(KERN_DEBUG "capi: recv tty throttled\n");
472 #endif
473 goto bad;
474 }
475 if (mp->tty->receive_room < datalen) {
476 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
477 printk(KERN_DEBUG "capi: no room in tty\n");
478 #endif
479 goto bad;
480 }
481 if ((nskb = gen_data_b3_resp_for(mp, skb)) == 0) {
482 printk(KERN_ERR "capi: gen_data_b3_resp failed\n");
483 goto bad;
484 }
485 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4);
486 errcode = capi20_put_message(mp->ap, nskb);
487 if (errcode != CAPI_NOERROR) {
488 printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n",
489 errcode);
490 kfree_skb(nskb);
491 goto bad;
492 }
493 (void)skb_pull(skb, CAPIMSG_LEN(skb->data));
494 #ifdef _DEBUG_DATAFLOW
495 printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n",
496 datahandle, skb->len);
497 #endif
498 ld->receive_buf(mp->tty, skb->data, NULL, skb->len);
499 kfree_skb(skb);
500 tty_ldisc_deref(ld);
501 return 0;
502 bad:
503 tty_ldisc_deref(ld);
504 return -1;
505 }
506
507 static void handle_minor_recv(struct capiminor *mp)
508 {
509 struct sk_buff *skb;
510 while ((skb = skb_dequeue(&mp->inqueue)) != 0) {
511 unsigned int len = skb->len;
512 mp->inbytes -= len;
513 if (handle_recv_skb(mp, skb) < 0) {
514 skb_queue_head(&mp->inqueue, skb);
515 mp->inbytes += len;
516 return;
517 }
518 }
519 }
520
521 static int handle_minor_send(struct capiminor *mp)
522 {
523 struct sk_buff *skb;
524 u16 len;
525 int count = 0;
526 u16 errcode;
527 u16 datahandle;
528
529 if (mp->tty && mp->ttyoutstop) {
530 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
531 printk(KERN_DEBUG "capi: send: tty stopped\n");
532 #endif
533 return 0;
534 }
535
536 while ((skb = skb_dequeue(&mp->outqueue)) != 0) {
537 datahandle = mp->datahandle;
538 len = (u16)skb->len;
539 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
540 memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
541 capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
542 capimsg_setu16(skb->data, 2, mp->ap->applid);
543 capimsg_setu8 (skb->data, 4, CAPI_DATA_B3);
544 capimsg_setu8 (skb->data, 5, CAPI_REQ);
545 capimsg_setu16(skb->data, 6, mp->msgid++);
546 capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */
547 capimsg_setu32(skb->data, 12, (u32) skb->data); /* Data32 */
548 capimsg_setu16(skb->data, 16, len); /* Data length */
549 capimsg_setu16(skb->data, 18, datahandle);
550 capimsg_setu16(skb->data, 20, 0); /* Flags */
551
552 if (capincci_add_ack(mp, datahandle) < 0) {
553 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
554 skb_queue_head(&mp->outqueue, skb);
555 return count;
556 }
557 errcode = capi20_put_message(mp->ap, skb);
558 if (errcode == CAPI_NOERROR) {
559 mp->datahandle++;
560 count++;
561 mp->outbytes -= len;
562 #ifdef _DEBUG_DATAFLOW
563 printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n",
564 datahandle, len);
565 #endif
566 continue;
567 }
568 capiminor_del_ack(mp, datahandle);
569
570 if (errcode == CAPI_SENDQUEUEFULL) {
571 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
572 skb_queue_head(&mp->outqueue, skb);
573 break;
574 }
575
576 /* ups, drop packet */
577 printk(KERN_ERR "capi: put_message = %x\n", errcode);
578 mp->outbytes -= len;
579 kfree_skb(skb);
580 }
581 return count;
582 }
583
584 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
585 /* -------- function called by lower level -------------------------- */
586
587 static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
588 {
589 struct capidev *cdev = ap->private;
590 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
591 struct capiminor *mp;
592 u16 datahandle;
593 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
594 struct capincci *np;
595 u32 ncci;
596
597 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) {
598 u16 info = CAPIMSG_U16(skb->data, 12); // Info field
599 if (info == 0) {
600 down(&cdev->ncci_list_sem);
601 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
602 up(&cdev->ncci_list_sem);
603 }
604 }
605 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) {
606 down(&cdev->ncci_list_sem);
607 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
608 up(&cdev->ncci_list_sem);
609 }
610 if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) {
611 skb_queue_tail(&cdev->recvqueue, skb);
612 wake_up_interruptible(&cdev->recvwait);
613 return;
614 }
615 ncci = CAPIMSG_CONTROL(skb->data);
616 for (np = cdev->nccis; np && np->ncci != ncci; np = np->next)
617 ;
618 if (!np) {
619 printk(KERN_ERR "BUG: capi_signal: ncci not found\n");
620 skb_queue_tail(&cdev->recvqueue, skb);
621 wake_up_interruptible(&cdev->recvwait);
622 return;
623 }
624 #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
625 skb_queue_tail(&cdev->recvqueue, skb);
626 wake_up_interruptible(&cdev->recvwait);
627 #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
628 mp = np->minorp;
629 if (!mp) {
630 skb_queue_tail(&cdev->recvqueue, skb);
631 wake_up_interruptible(&cdev->recvwait);
632 return;
633 }
634
635
636 if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) {
637
638 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2);
639 #ifdef _DEBUG_DATAFLOW
640 printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n",
641 datahandle, skb->len-CAPIMSG_LEN(skb->data));
642 #endif
643 skb_queue_tail(&mp->inqueue, skb);
644 mp->inbytes += skb->len;
645 handle_minor_recv(mp);
646
647 } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) {
648
649 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4);
650 #ifdef _DEBUG_DATAFLOW
651 printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n",
652 datahandle,
653 CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2));
654 #endif
655 kfree_skb(skb);
656 (void)capiminor_del_ack(mp, datahandle);
657 if (mp->tty)
658 tty_wakeup(mp->tty);
659 (void)handle_minor_send(mp);
660
661 } else {
662 /* ups, let capi application handle it :-) */
663 skb_queue_tail(&cdev->recvqueue, skb);
664 wake_up_interruptible(&cdev->recvwait);
665 }
666 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
667 }
668
669 /* -------- file_operations for capidev ----------------------------- */
670
671 static ssize_t
672 capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
673 {
674 struct capidev *cdev = (struct capidev *)file->private_data;
675 struct sk_buff *skb;
676 size_t copied;
677
678 if (!cdev->ap.applid)
679 return -ENODEV;
680
681 if ((skb = skb_dequeue(&cdev->recvqueue)) == 0) {
682
683 if (file->f_flags & O_NONBLOCK)
684 return -EAGAIN;
685
686 for (;;) {
687 interruptible_sleep_on(&cdev->recvwait);
688 if ((skb = skb_dequeue(&cdev->recvqueue)) != 0)
689 break;
690 if (signal_pending(current))
691 break;
692 }
693 if (skb == 0)
694 return -ERESTARTNOHAND;
695 }
696 if (skb->len > count) {
697 skb_queue_head(&cdev->recvqueue, skb);
698 return -EMSGSIZE;
699 }
700 if (copy_to_user(buf, skb->data, skb->len)) {
701 skb_queue_head(&cdev->recvqueue, skb);
702 return -EFAULT;
703 }
704 copied = skb->len;
705
706 kfree_skb(skb);
707
708 return copied;
709 }
710
711 static ssize_t
712 capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
713 {
714 struct capidev *cdev = (struct capidev *)file->private_data;
715 struct sk_buff *skb;
716 u16 mlen;
717
718 if (!cdev->ap.applid)
719 return -ENODEV;
720
721 skb = alloc_skb(count, GFP_USER);
722 if (!skb)
723 return -ENOMEM;
724
725 if (copy_from_user(skb_put(skb, count), buf, count)) {
726 kfree_skb(skb);
727 return -EFAULT;
728 }
729 mlen = CAPIMSG_LEN(skb->data);
730 if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
731 if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) {
732 kfree_skb(skb);
733 return -EINVAL;
734 }
735 } else {
736 if (mlen != count) {
737 kfree_skb(skb);
738 return -EINVAL;
739 }
740 }
741 CAPIMSG_SETAPPID(skb->data, cdev->ap.applid);
742
743 if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) {
744 down(&cdev->ncci_list_sem);
745 capincci_free(cdev, CAPIMSG_NCCI(skb->data));
746 up(&cdev->ncci_list_sem);
747 }
748
749 cdev->errcode = capi20_put_message(&cdev->ap, skb);
750
751 if (cdev->errcode) {
752 kfree_skb(skb);
753 return -EIO;
754 }
755 return count;
756 }
757
758 static unsigned int
759 capi_poll(struct file *file, poll_table * wait)
760 {
761 struct capidev *cdev = (struct capidev *)file->private_data;
762 unsigned int mask = 0;
763
764 if (!cdev->ap.applid)
765 return POLLERR;
766
767 poll_wait(file, &(cdev->recvwait), wait);
768 mask = POLLOUT | POLLWRNORM;
769 if (!skb_queue_empty(&cdev->recvqueue))
770 mask |= POLLIN | POLLRDNORM;
771 return mask;
772 }
773
774 static int
775 capi_ioctl(struct inode *inode, struct file *file,
776 unsigned int cmd, unsigned long arg)
777 {
778 struct capidev *cdev = file->private_data;
779 struct capi20_appl *ap = &cdev->ap;
780 capi_ioctl_struct data;
781 int retval = -EINVAL;
782 void __user *argp = (void __user *)arg;
783
784 switch (cmd) {
785 case CAPI_REGISTER:
786 {
787 if (ap->applid)
788 return -EEXIST;
789
790 if (copy_from_user(&cdev->ap.rparam, argp,
791 sizeof(struct capi_register_params)))
792 return -EFAULT;
793
794 cdev->ap.private = cdev;
795 cdev->ap.recv_message = capi_recv_message;
796 cdev->errcode = capi20_register(ap);
797 if (cdev->errcode) {
798 ap->applid = 0;
799 return -EIO;
800 }
801 }
802 return (int)ap->applid;
803
804 case CAPI_GET_VERSION:
805 {
806 if (copy_from_user(&data.contr, argp,
807 sizeof(data.contr)))
808 return -EFAULT;
809 cdev->errcode = capi20_get_version(data.contr, &data.version);
810 if (cdev->errcode)
811 return -EIO;
812 if (copy_to_user(argp, &data.version,
813 sizeof(data.version)))
814 return -EFAULT;
815 }
816 return 0;
817
818 case CAPI_GET_SERIAL:
819 {
820 if (copy_from_user(&data.contr, argp,
821 sizeof(data.contr)))
822 return -EFAULT;
823 cdev->errcode = capi20_get_serial (data.contr, data.serial);
824 if (cdev->errcode)
825 return -EIO;
826 if (copy_to_user(argp, data.serial,
827 sizeof(data.serial)))
828 return -EFAULT;
829 }
830 return 0;
831 case CAPI_GET_PROFILE:
832 {
833 if (copy_from_user(&data.contr, argp,
834 sizeof(data.contr)))
835 return -EFAULT;
836
837 if (data.contr == 0) {
838 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
839 if (cdev->errcode)
840 return -EIO;
841
842 retval = copy_to_user(argp,
843 &data.profile.ncontroller,
844 sizeof(data.profile.ncontroller));
845
846 } else {
847 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
848 if (cdev->errcode)
849 return -EIO;
850
851 retval = copy_to_user(argp, &data.profile,
852 sizeof(data.profile));
853 }
854 if (retval)
855 return -EFAULT;
856 }
857 return 0;
858
859 case CAPI_GET_MANUFACTURER:
860 {
861 if (copy_from_user(&data.contr, argp,
862 sizeof(data.contr)))
863 return -EFAULT;
864 cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer);
865 if (cdev->errcode)
866 return -EIO;
867
868 if (copy_to_user(argp, data.manufacturer,
869 sizeof(data.manufacturer)))
870 return -EFAULT;
871
872 }
873 return 0;
874 case CAPI_GET_ERRCODE:
875 data.errcode = cdev->errcode;
876 cdev->errcode = CAPI_NOERROR;
877 if (arg) {
878 if (copy_to_user(argp, &data.errcode,
879 sizeof(data.errcode)))
880 return -EFAULT;
881 }
882 return data.errcode;
883
884 case CAPI_INSTALLED:
885 if (capi20_isinstalled() == CAPI_NOERROR)
886 return 0;
887 return -ENXIO;
888
889 case CAPI_MANUFACTURER_CMD:
890 {
891 struct capi_manufacturer_cmd mcmd;
892 if (!capable(CAP_SYS_ADMIN))
893 return -EPERM;
894 if (copy_from_user(&mcmd, argp, sizeof(mcmd)))
895 return -EFAULT;
896 return capi20_manufacturer(mcmd.cmd, mcmd.data);
897 }
898 return 0;
899
900 case CAPI_SET_FLAGS:
901 case CAPI_CLR_FLAGS:
902 {
903 unsigned userflags;
904 if (copy_from_user(&userflags, argp,
905 sizeof(userflags)))
906 return -EFAULT;
907 if (cmd == CAPI_SET_FLAGS)
908 cdev->userflags |= userflags;
909 else
910 cdev->userflags &= ~userflags;
911 }
912 return 0;
913
914 case CAPI_GET_FLAGS:
915 if (copy_to_user(argp, &cdev->userflags,
916 sizeof(cdev->userflags)))
917 return -EFAULT;
918 return 0;
919
920 case CAPI_NCCI_OPENCOUNT:
921 {
922 struct capincci *nccip;
923 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
924 struct capiminor *mp;
925 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
926 unsigned ncci;
927 int count = 0;
928 if (copy_from_user(&ncci, argp, sizeof(ncci)))
929 return -EFAULT;
930
931 down(&cdev->ncci_list_sem);
932 if ((nccip = capincci_find(cdev, (u32) ncci)) == 0) {
933 up(&cdev->ncci_list_sem);
934 return 0;
935 }
936 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
937 if ((mp = nccip->minorp) != 0) {
938 count += atomic_read(&mp->ttyopencount);
939 }
940 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
941 up(&cdev->ncci_list_sem);
942 return count;
943 }
944 return 0;
945
946 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
947 case CAPI_NCCI_GETUNIT:
948 {
949 struct capincci *nccip;
950 struct capiminor *mp;
951 unsigned ncci;
952 int unit = 0;
953 if (copy_from_user(&ncci, argp,
954 sizeof(ncci)))
955 return -EFAULT;
956 down(&cdev->ncci_list_sem);
957 nccip = capincci_find(cdev, (u32) ncci);
958 if (!nccip || (mp = nccip->minorp) == 0) {
959 up(&cdev->ncci_list_sem);
960 return -ESRCH;
961 }
962 unit = mp->minor;
963 up(&cdev->ncci_list_sem);
964 return unit;
965 }
966 return 0;
967 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
968 }
969 return -EINVAL;
970 }
971
972 static int
973 capi_open(struct inode *inode, struct file *file)
974 {
975 if (file->private_data)
976 return -EEXIST;
977
978 if ((file->private_data = capidev_alloc()) == 0)
979 return -ENOMEM;
980
981 return nonseekable_open(inode, file);
982 }
983
984 static int
985 capi_release(struct inode *inode, struct file *file)
986 {
987 struct capidev *cdev = (struct capidev *)file->private_data;
988
989 capidev_free(cdev);
990 file->private_data = NULL;
991
992 return 0;
993 }
994
995 static struct file_operations capi_fops =
996 {
997 .owner = THIS_MODULE,
998 .llseek = no_llseek,
999 .read = capi_read,
1000 .write = capi_write,
1001 .poll = capi_poll,
1002 .ioctl = capi_ioctl,
1003 .open = capi_open,
1004 .release = capi_release,
1005 };
1006
1007 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1008 /* -------- tty_operations for capincci ----------------------------- */
1009
1010 static int capinc_tty_open(struct tty_struct * tty, struct file * file)
1011 {
1012 struct capiminor *mp;
1013
1014 if ((mp = capiminor_find(iminor(file->f_dentry->d_inode))) == 0)
1015 return -ENXIO;
1016 if (mp->nccip == 0)
1017 return -ENXIO;
1018
1019 tty->driver_data = (void *)mp;
1020
1021 if (atomic_read(&mp->ttyopencount) == 0)
1022 mp->tty = tty;
1023 atomic_inc(&mp->ttyopencount);
1024 #ifdef _DEBUG_REFCOUNT
1025 printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount));
1026 #endif
1027 handle_minor_recv(mp);
1028 return 0;
1029 }
1030
1031 static void capinc_tty_close(struct tty_struct * tty, struct file * file)
1032 {
1033 struct capiminor *mp;
1034
1035 mp = (struct capiminor *)tty->driver_data;
1036 if (mp) {
1037 if (atomic_dec_and_test(&mp->ttyopencount)) {
1038 #ifdef _DEBUG_REFCOUNT
1039 printk(KERN_DEBUG "capinc_tty_close lastclose\n");
1040 #endif
1041 tty->driver_data = NULL;
1042 mp->tty = NULL;
1043 }
1044 #ifdef _DEBUG_REFCOUNT
1045 printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount));
1046 #endif
1047 if (mp->nccip == 0)
1048 capiminor_free(mp);
1049 }
1050
1051 #ifdef _DEBUG_REFCOUNT
1052 printk(KERN_DEBUG "capinc_tty_close\n");
1053 #endif
1054 }
1055
1056 static int capinc_tty_write(struct tty_struct * tty,
1057 const unsigned char *buf, int count)
1058 {
1059 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1060 struct sk_buff *skb;
1061
1062 #ifdef _DEBUG_TTYFUNCS
1063 printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count);
1064 #endif
1065
1066 if (!mp || !mp->nccip) {
1067 #ifdef _DEBUG_TTYFUNCS
1068 printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n");
1069 #endif
1070 return 0;
1071 }
1072
1073 skb = mp->ttyskb;
1074 if (skb) {
1075 mp->ttyskb = NULL;
1076 skb_queue_tail(&mp->outqueue, skb);
1077 mp->outbytes += skb->len;
1078 }
1079
1080 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC);
1081 if (!skb) {
1082 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
1083 return -ENOMEM;
1084 }
1085
1086 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1087 memcpy(skb_put(skb, count), buf, count);
1088
1089 skb_queue_tail(&mp->outqueue, skb);
1090 mp->outbytes += skb->len;
1091 (void)handle_minor_send(mp);
1092 (void)handle_minor_recv(mp);
1093 return count;
1094 }
1095
1096 static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
1097 {
1098 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1099 struct sk_buff *skb;
1100
1101 #ifdef _DEBUG_TTYFUNCS
1102 printk(KERN_DEBUG "capinc_put_char(%u)\n", ch);
1103 #endif
1104
1105 if (!mp || !mp->nccip) {
1106 #ifdef _DEBUG_TTYFUNCS
1107 printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n");
1108 #endif
1109 return;
1110 }
1111
1112 skb = mp->ttyskb;
1113 if (skb) {
1114 if (skb_tailroom(skb) > 0) {
1115 *(skb_put(skb, 1)) = ch;
1116 return;
1117 }
1118 mp->ttyskb = NULL;
1119 skb_queue_tail(&mp->outqueue, skb);
1120 mp->outbytes += skb->len;
1121 (void)handle_minor_send(mp);
1122 }
1123 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC);
1124 if (skb) {
1125 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1126 *(skb_put(skb, 1)) = ch;
1127 mp->ttyskb = skb;
1128 } else {
1129 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
1130 }
1131 }
1132
1133 static void capinc_tty_flush_chars(struct tty_struct *tty)
1134 {
1135 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1136 struct sk_buff *skb;
1137
1138 #ifdef _DEBUG_TTYFUNCS
1139 printk(KERN_DEBUG "capinc_tty_flush_chars\n");
1140 #endif
1141
1142 if (!mp || !mp->nccip) {
1143 #ifdef _DEBUG_TTYFUNCS
1144 printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n");
1145 #endif
1146 return;
1147 }
1148
1149 skb = mp->ttyskb;
1150 if (skb) {
1151 mp->ttyskb = NULL;
1152 skb_queue_tail(&mp->outqueue, skb);
1153 mp->outbytes += skb->len;
1154 (void)handle_minor_send(mp);
1155 }
1156 (void)handle_minor_recv(mp);
1157 }
1158
1159 static int capinc_tty_write_room(struct tty_struct *tty)
1160 {
1161 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1162 int room;
1163 if (!mp || !mp->nccip) {
1164 #ifdef _DEBUG_TTYFUNCS
1165 printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n");
1166 #endif
1167 return 0;
1168 }
1169 room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
1170 room *= CAPI_MAX_BLKSIZE;
1171 #ifdef _DEBUG_TTYFUNCS
1172 printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room);
1173 #endif
1174 return room;
1175 }
1176
1177 static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
1178 {
1179 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1180 if (!mp || !mp->nccip) {
1181 #ifdef _DEBUG_TTYFUNCS
1182 printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n");
1183 #endif
1184 return 0;
1185 }
1186 #ifdef _DEBUG_TTYFUNCS
1187 printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
1188 mp->outbytes, mp->nack,
1189 skb_queue_len(&mp->outqueue),
1190 skb_queue_len(&mp->inqueue));
1191 #endif
1192 return mp->outbytes;
1193 }
1194
1195 static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file,
1196 unsigned int cmd, unsigned long arg)
1197 {
1198 int error = 0;
1199 switch (cmd) {
1200 default:
1201 error = n_tty_ioctl (tty, file, cmd, arg);
1202 break;
1203 }
1204 return error;
1205 }
1206
1207 static void capinc_tty_set_termios(struct tty_struct *tty, struct termios * old)
1208 {
1209 #ifdef _DEBUG_TTYFUNCS
1210 printk(KERN_DEBUG "capinc_tty_set_termios\n");
1211 #endif
1212 }
1213
1214 static void capinc_tty_throttle(struct tty_struct * tty)
1215 {
1216 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1217 #ifdef _DEBUG_TTYFUNCS
1218 printk(KERN_DEBUG "capinc_tty_throttle\n");
1219 #endif
1220 if (mp)
1221 mp->ttyinstop = 1;
1222 }
1223
1224 static void capinc_tty_unthrottle(struct tty_struct * tty)
1225 {
1226 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1227 #ifdef _DEBUG_TTYFUNCS
1228 printk(KERN_DEBUG "capinc_tty_unthrottle\n");
1229 #endif
1230 if (mp) {
1231 mp->ttyinstop = 0;
1232 handle_minor_recv(mp);
1233 }
1234 }
1235
1236 static void capinc_tty_stop(struct tty_struct *tty)
1237 {
1238 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1239 #ifdef _DEBUG_TTYFUNCS
1240 printk(KERN_DEBUG "capinc_tty_stop\n");
1241 #endif
1242 if (mp) {
1243 mp->ttyoutstop = 1;
1244 }
1245 }
1246
1247 static void capinc_tty_start(struct tty_struct *tty)
1248 {
1249 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1250 #ifdef _DEBUG_TTYFUNCS
1251 printk(KERN_DEBUG "capinc_tty_start\n");
1252 #endif
1253 if (mp) {
1254 mp->ttyoutstop = 0;
1255 (void)handle_minor_send(mp);
1256 }
1257 }
1258
1259 static void capinc_tty_hangup(struct tty_struct *tty)
1260 {
1261 #ifdef _DEBUG_TTYFUNCS
1262 printk(KERN_DEBUG "capinc_tty_hangup\n");
1263 #endif
1264 }
1265
1266 static void capinc_tty_break_ctl(struct tty_struct *tty, int state)
1267 {
1268 #ifdef _DEBUG_TTYFUNCS
1269 printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state);
1270 #endif
1271 }
1272
1273 static void capinc_tty_flush_buffer(struct tty_struct *tty)
1274 {
1275 #ifdef _DEBUG_TTYFUNCS
1276 printk(KERN_DEBUG "capinc_tty_flush_buffer\n");
1277 #endif
1278 }
1279
1280 static void capinc_tty_set_ldisc(struct tty_struct *tty)
1281 {
1282 #ifdef _DEBUG_TTYFUNCS
1283 printk(KERN_DEBUG "capinc_tty_set_ldisc\n");
1284 #endif
1285 }
1286
1287 static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
1288 {
1289 #ifdef _DEBUG_TTYFUNCS
1290 printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch);
1291 #endif
1292 }
1293
1294 static int capinc_tty_read_proc(char *page, char **start, off_t off,
1295 int count, int *eof, void *data)
1296 {
1297 return 0;
1298 }
1299
1300 static struct tty_driver *capinc_tty_driver;
1301
1302 static struct tty_operations capinc_ops = {
1303 .open = capinc_tty_open,
1304 .close = capinc_tty_close,
1305 .write = capinc_tty_write,
1306 .put_char = capinc_tty_put_char,
1307 .flush_chars = capinc_tty_flush_chars,
1308 .write_room = capinc_tty_write_room,
1309 .chars_in_buffer = capinc_tty_chars_in_buffer,
1310 .ioctl = capinc_tty_ioctl,
1311 .set_termios = capinc_tty_set_termios,
1312 .throttle = capinc_tty_throttle,
1313 .unthrottle = capinc_tty_unthrottle,
1314 .stop = capinc_tty_stop,
1315 .start = capinc_tty_start,
1316 .hangup = capinc_tty_hangup,
1317 .break_ctl = capinc_tty_break_ctl,
1318 .flush_buffer = capinc_tty_flush_buffer,
1319 .set_ldisc = capinc_tty_set_ldisc,
1320 .send_xchar = capinc_tty_send_xchar,
1321 .read_proc = capinc_tty_read_proc,
1322 };
1323
1324 static int capinc_tty_init(void)
1325 {
1326 struct tty_driver *drv;
1327
1328 if (capi_ttyminors > CAPINC_MAX_PORTS)
1329 capi_ttyminors = CAPINC_MAX_PORTS;
1330 if (capi_ttyminors <= 0)
1331 capi_ttyminors = CAPINC_NR_PORTS;
1332
1333 drv = alloc_tty_driver(capi_ttyminors);
1334 if (!drv)
1335 return -ENOMEM;
1336
1337 drv->owner = THIS_MODULE;
1338 drv->driver_name = "capi_nc";
1339 drv->name = "capi";
1340 drv->major = capi_ttymajor;
1341 drv->minor_start = 0;
1342 drv->type = TTY_DRIVER_TYPE_SERIAL;
1343 drv->subtype = SERIAL_TYPE_NORMAL;
1344 drv->init_termios = tty_std_termios;
1345 drv->init_termios.c_iflag = ICRNL;
1346 drv->init_termios.c_oflag = OPOST | ONLCR;
1347 drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1348 drv->init_termios.c_lflag = 0;
1349 drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS;
1350 tty_set_operations(drv, &capinc_ops);
1351 if (tty_register_driver(drv)) {
1352 put_tty_driver(drv);
1353 printk(KERN_ERR "Couldn't register capi_nc driver\n");
1354 return -1;
1355 }
1356 capinc_tty_driver = drv;
1357 return 0;
1358 }
1359
1360 static void capinc_tty_exit(void)
1361 {
1362 struct tty_driver *drv = capinc_tty_driver;
1363 int retval;
1364 if ((retval = tty_unregister_driver(drv)))
1365 printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval);
1366 put_tty_driver(drv);
1367 }
1368
1369 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
1370
1371 /* -------- /proc functions ----------------------------------------- */
1372
1373 /*
1374 * /proc/capi/capi20:
1375 * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
1376 */
1377 static int proc_capidev_read_proc(char *page, char **start, off_t off,
1378 int count, int *eof, void *data)
1379 {
1380 struct capidev *cdev;
1381 struct list_head *l;
1382 int len = 0;
1383
1384 read_lock(&capidev_list_lock);
1385 list_for_each(l, &capidev_list) {
1386 cdev = list_entry(l, struct capidev, list);
1387 len += sprintf(page+len, "0 %d %lu %lu %lu %lu\n",
1388 cdev->ap.applid,
1389 cdev->ap.nrecvctlpkt,
1390 cdev->ap.nrecvdatapkt,
1391 cdev->ap.nsentctlpkt,
1392 cdev->ap.nsentdatapkt);
1393 if (len <= off) {
1394 off -= len;
1395 len = 0;
1396 } else {
1397 if (len-off > count)
1398 goto endloop;
1399 }
1400 }
1401
1402 endloop:
1403 read_unlock(&capidev_list_lock);
1404 if (len < count)
1405 *eof = 1;
1406 if (len > count) len = count;
1407 if (len < 0) len = 0;
1408 return len;
1409 }
1410
1411 /*
1412 * /proc/capi/capi20ncci:
1413 * applid ncci
1414 */
1415 static int proc_capincci_read_proc(char *page, char **start, off_t off,
1416 int count, int *eof, void *data)
1417 {
1418 struct capidev *cdev;
1419 struct capincci *np;
1420 struct list_head *l;
1421 int len = 0;
1422
1423 read_lock(&capidev_list_lock);
1424 list_for_each(l, &capidev_list) {
1425 cdev = list_entry(l, struct capidev, list);
1426 for (np=cdev->nccis; np; np = np->next) {
1427 len += sprintf(page+len, "%d 0x%x\n",
1428 cdev->ap.applid,
1429 np->ncci);
1430 if (len <= off) {
1431 off -= len;
1432 len = 0;
1433 } else {
1434 if (len-off > count)
1435 goto endloop;
1436 }
1437 }
1438 }
1439 endloop:
1440 read_unlock(&capidev_list_lock);
1441 *start = page+off;
1442 if (len < count)
1443 *eof = 1;
1444 if (len>count) len = count;
1445 if (len<0) len = 0;
1446 return len;
1447 }
1448
1449 static struct procfsentries {
1450 char *name;
1451 mode_t mode;
1452 int (*read_proc)(char *page, char **start, off_t off,
1453 int count, int *eof, void *data);
1454 struct proc_dir_entry *procent;
1455 } procfsentries[] = {
1456 /* { "capi", S_IFDIR, 0 }, */
1457 { "capi/capi20", 0 , proc_capidev_read_proc },
1458 { "capi/capi20ncci", 0 , proc_capincci_read_proc },
1459 };
1460
1461 static void __init proc_init(void)
1462 {
1463 int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
1464 int i;
1465
1466 for (i=0; i < nelem; i++) {
1467 struct procfsentries *p = procfsentries + i;
1468 p->procent = create_proc_entry(p->name, p->mode, NULL);
1469 if (p->procent) p->procent->read_proc = p->read_proc;
1470 }
1471 }
1472
1473 static void __exit proc_exit(void)
1474 {
1475 int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
1476 int i;
1477
1478 for (i=nelem-1; i >= 0; i--) {
1479 struct procfsentries *p = procfsentries + i;
1480 if (p->procent) {
1481 remove_proc_entry(p->name, NULL);
1482 p->procent = NULL;
1483 }
1484 }
1485 }
1486
1487 /* -------- init function and module interface ---------------------- */
1488
1489
1490 static char rev[32];
1491
1492 static int __init capi_init(void)
1493 {
1494 char *p;
1495 char *compileinfo;
1496 int major_ret;
1497
1498 if ((p = strchr(revision, ':')) != 0 && p[1]) {
1499 strlcpy(rev, p + 2, sizeof(rev));
1500 if ((p = strchr(rev, '$')) != 0 && p > rev)
1501 *(p-1) = 0;
1502 } else
1503 strcpy(rev, "1.0");
1504
1505 major_ret = register_chrdev(capi_major, "capi20", &capi_fops);
1506 if (major_ret < 0) {
1507 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
1508 return major_ret;
1509 }
1510 capi_class = class_create(THIS_MODULE, "capi");
1511 if (IS_ERR(capi_class)) {
1512 unregister_chrdev(capi_major, "capi20");
1513 return PTR_ERR(capi_class);
1514 }
1515
1516 class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
1517
1518 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1519 if (capinc_tty_init() < 0) {
1520 class_device_destroy(capi_class, MKDEV(capi_major, 0));
1521 class_destroy(capi_class);
1522 unregister_chrdev(capi_major, "capi20");
1523 return -ENOMEM;
1524 }
1525 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
1526
1527 proc_init();
1528
1529 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1530 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
1531 compileinfo = " (middleware+capifs)";
1532 #else
1533 compileinfo = " (no capifs)";
1534 #endif
1535 #else
1536 compileinfo = " (no middleware)";
1537 #endif
1538 printk(KERN_NOTICE "capi20: Rev %s: started up with major %d%s\n",
1539 rev, capi_major, compileinfo);
1540
1541 return 0;
1542 }
1543
1544 static void __exit capi_exit(void)
1545 {
1546 proc_exit();
1547
1548 class_device_destroy(capi_class, MKDEV(capi_major, 0));
1549 class_destroy(capi_class);
1550 unregister_chrdev(capi_major, "capi20");
1551
1552 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1553 capinc_tty_exit();
1554 #endif
1555 printk(KERN_NOTICE "capi: Rev %s: unloaded\n", rev);
1556 }
1557
1558 module_init(capi_init);
1559 module_exit(capi_exit);
Linux kernel - Deliverables
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