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[PATCH] tty: switch to ktermios and new framework
[deliverable/linux.git] / drivers / isdn / capi / capi.c
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1da177e4
LT		 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
1da177e4
LT		 12#include <linux/module.h>
13#include <linux/errno.h>
14#include <linux/kernel.h>
15#include <linux/major.h>
16#include <linux/sched.h>
17#include <linux/slab.h>
18#include <linux/fcntl.h>
19#include <linux/fs.h>
20#include <linux/signal.h>
21#include <linux/mm.h>
22#include <linux/smp_lock.h>
23#include <linux/timer.h>
24#include <linux/wait.h>
25#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
26#include <linux/tty.h>
27#ifdef CONFIG_PPP
28#include <linux/netdevice.h>
29#include <linux/ppp_defs.h>
30#include <linux/if_ppp.h>
31#endif /* CONFIG_PPP */
32#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
33#include <linux/skbuff.h>
34#include <linux/proc_fs.h>
35#include <linux/poll.h>
36#include <linux/capi.h>
37#include <linux/kernelcapi.h>
38#include <linux/init.h>
39#include <linux/device.h>
40#include <linux/moduleparam.h>
1da177e4
LT		 41#include <linux/isdn/capiutil.h>
42#include <linux/isdn/capicmd.h>
43#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
44#include "capifs.h"
45#endif
46
47static char *revision = "$Revision: 1.1.2.7 $";
48
49MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
50MODULE_AUTHOR("Carsten Paeth");
51MODULE_LICENSE("GPL");
52
53#undef _DEBUG_REFCOUNT /* alloc/free and open/close debug */
54#undef _DEBUG_TTYFUNCS /* call to tty_driver */
55#undef _DEBUG_DATAFLOW /* data flow */
56
57/* -------- driver information -------------------------------------- */
58
56b22935 59static struct class *capi_class;
1da177e4 60
408b664a 61static int capi_major = 68; /* allocated */
1da177e4
LT		 62#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
63#define CAPINC_NR_PORTS 32
64#define CAPINC_MAX_PORTS 256
408b664a
AB		 65static int capi_ttymajor = 191;
66static int capi_ttyminors = CAPINC_NR_PORTS;
1da177e4
LT		 67#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
68
69module_param_named(major, capi_major, uint, 0);
70#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
71module_param_named(ttymajor, capi_ttymajor, uint, 0);
72module_param_named(ttyminors, capi_ttyminors, uint, 0);
73#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
74
75/* -------- defines ------------------------------------------------- */
76
77#define CAPINC_MAX_RECVQUEUE 10
78#define CAPINC_MAX_SENDQUEUE 10
79#define CAPI_MAX_BLKSIZE 2048
80
81/* -------- data structures ----------------------------------------- */
82
83struct capidev;
84struct capincci;
85#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
86struct capiminor;
87
6aa65472
MB		 88struct datahandle_queue {
89 struct list_head list;
90 u16 datahandle;
91};
92
1da177e4
LT		 93struct capiminor {
94 struct list_head list;
95 struct capincci *nccip;
96 unsigned int minor;
97
98 struct capi20_appl *ap;
99 u32 ncci;
100 u16 datahandle;
101 u16 msgid;
102
103 struct tty_struct *tty;
104 int ttyinstop;
105 int ttyoutstop;
106 struct sk_buff *ttyskb;
107 atomic_t ttyopencount;
108
109 struct sk_buff_head inqueue;
110 int inbytes;
111 struct sk_buff_head outqueue;
112 int outbytes;
113
114 /* transmit path */
6aa65472 115 struct list_head ackqueue;
1da177e4 116 int nack;
6aa65472 117 spinlock_t ackqlock;
1da177e4
LT		 118};
119#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
120
121struct 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
130struct 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
146static DEFINE_RWLOCK(capidev_list_lock);
147static LIST_HEAD(capidev_list);
148
149#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
150static DEFINE_RWLOCK(capiminor_list_lock);
151static LIST_HEAD(capiminor_list);
152#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
153
154#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
155/* -------- datahandles --------------------------------------------- */
156
157static int capincci_add_ack(struct capiminor *mp, u16 datahandle)
158{
6aa65472
MB		 159 struct datahandle_queue *n;
160 unsigned long flags;
1da177e4
LT		 161
162 n = kmalloc(sizeof(*n), GFP_ATOMIC);
6aa65472
MB		 163 if (unlikely(!n)) {
164 printk(KERN_ERR "capi: alloc datahandle failed\n");
165 return -1;
1da177e4 166 }
1da177e4 167 n->datahandle = datahandle;
6aa65472
MB		 168 INIT_LIST_HEAD(&n->list);
169 spin_lock_irqsave(&mp->ackqlock, flags);
170 list_add_tail(&n->list, &mp->ackqueue);
1da177e4 171 mp->nack++;
6aa65472 172 spin_unlock_irqrestore(&mp->ackqlock, flags);
1da177e4
LT		 173 return 0;
174}
175
176static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
177{
6aa65472
MB		 178 struct datahandle_queue *p, *tmp;
179 unsigned long flags;
1da177e4 180
6aa65472
MB		 181 spin_lock_irqsave(&mp->ackqlock, flags);
182 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
183 if (p->datahandle == datahandle) {
184 list_del(&p->list);
1da177e4
LT		 185 kfree(p);
186 mp->nack--;
6aa65472 187 spin_unlock_irqrestore(&mp->ackqlock, flags);
1da177e4
LT		 188 return 0;
189 }
190 }
6aa65472 191 spin_unlock_irqrestore(&mp->ackqlock, flags);
1da177e4
LT		 192 return -1;
193}
194
195static void capiminor_del_all_ack(struct capiminor *mp)
196{
6aa65472
MB		 197 struct datahandle_queue *p, *tmp;
198 unsigned long flags;
1da177e4 199
6aa65472
MB		 200 spin_lock_irqsave(&mp->ackqlock, flags);
201 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
202 list_del(&p->list);
1da177e4
LT		 203 kfree(p);
204 mp->nack--;
205 }
6aa65472 206 spin_unlock_irqrestore(&mp->ackqlock, flags);
1da177e4
LT		 207}
208
209
210/* -------- struct capiminor ---------------------------------------- */
211
212static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
213{
214 struct capiminor *mp, *p;
215 unsigned int minor = 0;
216 unsigned long flags;
217
218 mp = kmalloc(sizeof(*mp), GFP_ATOMIC);
219 if (!mp) {
220 printk(KERN_ERR "capi: can't alloc capiminor\n");
221 return NULL;
222 }
223
224 memset(mp, 0, sizeof(struct capiminor));
225 mp->ap = ap;
226 mp->ncci = ncci;
227 mp->msgid = 0;
228 atomic_set(&mp->ttyopencount,0);
6aa65472
MB		 229 INIT_LIST_HEAD(&mp->ackqueue);
230 spin_lock_init(&mp->ackqlock);
1da177e4
LT		 231
232 skb_queue_head_init(&mp->inqueue);
233 skb_queue_head_init(&mp->outqueue);
234
235 /* Allocate the least unused minor number.
236 */
237 write_lock_irqsave(&capiminor_list_lock, flags);
238 if (list_empty(&capiminor_list))
239 list_add(&mp->list, &capiminor_list);
240 else {
241 list_for_each_entry(p, &capiminor_list, list) {
242 if (p->minor > minor)
243 break;
244 minor++;
245 }
246
247 if (minor < capi_ttyminors) {
248 mp->minor = minor;
249 list_add(&mp->list, p->list.prev);
250 }
251 }
252 write_unlock_irqrestore(&capiminor_list_lock, flags);
253
254 if (!(minor < capi_ttyminors)) {
255 printk(KERN_NOTICE "capi: out of minors\n");
256 kfree(mp);
257 return NULL;
258 }
259
260 return mp;
261}
262
263static void capiminor_free(struct capiminor *mp)
264{
265 unsigned long flags;
266
267 write_lock_irqsave(&capiminor_list_lock, flags);
268 list_del(&mp->list);
269 write_unlock_irqrestore(&capiminor_list_lock, flags);
270
271 if (mp->ttyskb) kfree_skb(mp->ttyskb);
272 mp->ttyskb = NULL;
273 skb_queue_purge(&mp->inqueue);
274 skb_queue_purge(&mp->outqueue);
275 capiminor_del_all_ack(mp);
276 kfree(mp);
277}
278
408b664a 279static struct capiminor *capiminor_find(unsigned int minor)
1da177e4
LT		 280{
281 struct list_head *l;
282 struct capiminor *p = NULL;
283
284 read_lock(&capiminor_list_lock);
285 list_for_each(l, &capiminor_list) {
286 p = list_entry(l, struct capiminor, list);
287 if (p->minor == minor)
288 break;
289 }
290 read_unlock(&capiminor_list_lock);
291 if (l == &capiminor_list)
292 return NULL;
293
294 return p;
295}
296#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
297
298/* -------- struct capincci ----------------------------------------- */
299
300static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
301{
302 struct capincci *np, **pp;
303#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
304 struct capiminor *mp = NULL;
305#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
306
307 np = kmalloc(sizeof(*np), GFP_ATOMIC);
308 if (!np)
309 return NULL;
310 memset(np, 0, sizeof(struct capincci));
311 np->ncci = ncci;
312 np->cdev = cdev;
313#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
314 mp = NULL;
315 if (cdev->userflags & CAPIFLAG_HIGHJACKING)
316 mp = np->minorp = capiminor_alloc(&cdev->ap, ncci);
317 if (mp) {
318 mp->nccip = np;
319#ifdef _DEBUG_REFCOUNT
320 printk(KERN_DEBUG "set mp->nccip\n");
321#endif
322#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
323 capifs_new_ncci(mp->minor, MKDEV(capi_ttymajor, mp->minor));
324#endif
325 }
326#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
327 for (pp=&cdev->nccis; *pp; pp = &(*pp)->next)
328 ;
329 *pp = np;
330 return np;
331}
332
333static void capincci_free(struct capidev *cdev, u32 ncci)
334{
335 struct capincci *np, **pp;
336#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
337 struct capiminor *mp;
338#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
339
340 pp=&cdev->nccis;
341 while (*pp) {
342 np = *pp;
343 if (ncci == 0xffffffff || np->ncci == ncci) {
344 *pp = (*pp)->next;
345#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
346 if ((mp = np->minorp) != 0) {
347#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
348 capifs_free_ncci(mp->minor);
349#endif
350 if (mp->tty) {
351 mp->nccip = NULL;
352#ifdef _DEBUG_REFCOUNT
353 printk(KERN_DEBUG "reset mp->nccip\n");
354#endif
355 tty_hangup(mp->tty);
356 } else {
357 capiminor_free(mp);
358 }
359 }
360#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
361 kfree(np);
362 if (*pp == 0) return;
363 } else {
364 pp = &(*pp)->next;
365 }
366 }
367}
368
369static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
370{
371 struct capincci *p;
372
373 for (p=cdev->nccis; p ; p = p->next) {
374 if (p->ncci == ncci)
375 break;
376 }
377 return p;
378}
379
380/* -------- struct capidev ------------------------------------------ */
381
382static struct capidev *capidev_alloc(void)
383{
384 struct capidev *cdev;
385 unsigned long flags;
386
387 cdev = kmalloc(sizeof(*cdev), GFP_KERNEL);
388 if (!cdev)
389 return NULL;
390 memset(cdev, 0, sizeof(struct capidev));
391
392 init_MUTEX(&cdev->ncci_list_sem);
393 skb_queue_head_init(&cdev->recvqueue);
394 init_waitqueue_head(&cdev->recvwait);
395 write_lock_irqsave(&capidev_list_lock, flags);
396 list_add_tail(&cdev->list, &capidev_list);
397 write_unlock_irqrestore(&capidev_list_lock, flags);
398 return cdev;
399}
400
401static void capidev_free(struct capidev *cdev)
402{
403 unsigned long flags;
404
405 if (cdev->ap.applid) {
406 capi20_release(&cdev->ap);
407 cdev->ap.applid = 0;
408 }
409 skb_queue_purge(&cdev->recvqueue);
410
411 down(&cdev->ncci_list_sem);
412 capincci_free(cdev, 0xffffffff);
413 up(&cdev->ncci_list_sem);
414
415 write_lock_irqsave(&capidev_list_lock, flags);
416 list_del(&cdev->list);
417 write_unlock_irqrestore(&capidev_list_lock, flags);
418 kfree(cdev);
419}
420
421#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
422/* -------- handle data queue --------------------------------------- */
423
424static struct sk_buff *
425gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb)
426{
427 struct sk_buff *nskb;
428 nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC);
429 if (nskb) {
430 u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2);
431 unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN);
432 capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN);
433 capimsg_setu16(s, 2, mp->ap->applid);
434 capimsg_setu8 (s, 4, CAPI_DATA_B3);
435 capimsg_setu8 (s, 5, CAPI_RESP);
436 capimsg_setu16(s, 6, mp->msgid++);
437 capimsg_setu32(s, 8, mp->ncci);
438 capimsg_setu16(s, 12, datahandle);
439 }
440 return nskb;
441}
442
443static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb)
444{
445 struct sk_buff *nskb;
446 int datalen;
447 u16 errcode, datahandle;
448 struct tty_ldisc *ld;
449
450 datalen = skb->len - CAPIMSG_LEN(skb->data);
451 if (mp->tty == NULL)
452 {
453#ifdef _DEBUG_DATAFLOW
454 printk(KERN_DEBUG "capi: currently no receiver\n");
455#endif
456 return -1;
457 }
458
459 ld = tty_ldisc_ref(mp->tty);
460 if (ld == NULL)
461 return -1;
462 if (ld->receive_buf == NULL) {
463#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
464 printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n");
465#endif
466 goto bad;
467 }
468 if (mp->ttyinstop) {
469#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
470 printk(KERN_DEBUG "capi: recv tty throttled\n");
471#endif
472 goto bad;
473 }
33f0f88f 474 if (mp->tty->receive_room < datalen) {
1da177e4
LT		 475#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
476 printk(KERN_DEBUG "capi: no room in tty\n");
477#endif
478 goto bad;
479 }
480 if ((nskb = gen_data_b3_resp_for(mp, skb)) == 0) {
481 printk(KERN_ERR "capi: gen_data_b3_resp failed\n");
482 goto bad;
483 }
484 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4);
485 errcode = capi20_put_message(mp->ap, nskb);
486 if (errcode != CAPI_NOERROR) {
487 printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n",
488 errcode);
489 kfree_skb(nskb);
490 goto bad;
491 }
492 (void)skb_pull(skb, CAPIMSG_LEN(skb->data));
493#ifdef _DEBUG_DATAFLOW
494 printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n",
495 datahandle, skb->len);
496#endif
497 ld->receive_buf(mp->tty, skb->data, NULL, skb->len);
498 kfree_skb(skb);
499 tty_ldisc_deref(ld);
500 return 0;
501bad:
502 tty_ldisc_deref(ld);
503 return -1;
504}
505
506static void handle_minor_recv(struct capiminor *mp)
507{
508 struct sk_buff *skb;
509 while ((skb = skb_dequeue(&mp->inqueue)) != 0) {
510 unsigned int len = skb->len;
511 mp->inbytes -= len;
512 if (handle_recv_skb(mp, skb) < 0) {
513 skb_queue_head(&mp->inqueue, skb);
514 mp->inbytes += len;
515 return;
516 }
517 }
518}
519
520static int handle_minor_send(struct capiminor *mp)
521{
522 struct sk_buff *skb;
523 u16 len;
524 int count = 0;
525 u16 errcode;
526 u16 datahandle;
527
528 if (mp->tty && mp->ttyoutstop) {
529#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
530 printk(KERN_DEBUG "capi: send: tty stopped\n");
531#endif
532 return 0;
533 }
534
535 while ((skb = skb_dequeue(&mp->outqueue)) != 0) {
536 datahandle = mp->datahandle;
537 len = (u16)skb->len;
538 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
539 memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
540 capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
541 capimsg_setu16(skb->data, 2, mp->ap->applid);
542 capimsg_setu8 (skb->data, 4, CAPI_DATA_B3);
543 capimsg_setu8 (skb->data, 5, CAPI_REQ);
544 capimsg_setu16(skb->data, 6, mp->msgid++);
545 capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */
546 capimsg_setu32(skb->data, 12, (u32) skb->data); /* Data32 */
547 capimsg_setu16(skb->data, 16, len); /* Data length */
548 capimsg_setu16(skb->data, 18, datahandle);
549 capimsg_setu16(skb->data, 20, 0); /* Flags */
550
551 if (capincci_add_ack(mp, datahandle) < 0) {
552 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
553 skb_queue_head(&mp->outqueue, skb);
554 return count;
555 }
556 errcode = capi20_put_message(mp->ap, skb);
557 if (errcode == CAPI_NOERROR) {
558 mp->datahandle++;
559 count++;
560 mp->outbytes -= len;
561#ifdef _DEBUG_DATAFLOW
562 printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n",
563 datahandle, len);
564#endif
565 continue;
566 }
567 capiminor_del_ack(mp, datahandle);
568
569 if (errcode == CAPI_SENDQUEUEFULL) {
570 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
571 skb_queue_head(&mp->outqueue, skb);
572 break;
573 }
574
575 /* ups, drop packet */
576 printk(KERN_ERR "capi: put_message = %x\n", errcode);
577 mp->outbytes -= len;
578 kfree_skb(skb);
579 }
580 return count;
581}
582
583#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
584/* -------- function called by lower level -------------------------- */
585
586static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
587{
588 struct capidev *cdev = ap->private;
589#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
590 struct capiminor *mp;
591 u16 datahandle;
592#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
593 struct capincci *np;
594 u32 ncci;
595
596 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) {
597 u16 info = CAPIMSG_U16(skb->data, 12); // Info field
598 if (info == 0) {
599 down(&cdev->ncci_list_sem);
600 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
601 up(&cdev->ncci_list_sem);
602 }
603 }
604 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) {
605 down(&cdev->ncci_list_sem);
606 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
607 up(&cdev->ncci_list_sem);
608 }
609 if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) {
610 skb_queue_tail(&cdev->recvqueue, skb);
611 wake_up_interruptible(&cdev->recvwait);
612 return;
613 }
614 ncci = CAPIMSG_CONTROL(skb->data);
615 for (np = cdev->nccis; np && np->ncci != ncci; np = np->next)
616 ;
617 if (!np) {
618 printk(KERN_ERR "BUG: capi_signal: ncci not found\n");
619 skb_queue_tail(&cdev->recvqueue, skb);
620 wake_up_interruptible(&cdev->recvwait);
621 return;
622 }
623#ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
624 skb_queue_tail(&cdev->recvqueue, skb);
625 wake_up_interruptible(&cdev->recvwait);
626#else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
627 mp = np->minorp;
628 if (!mp) {
629 skb_queue_tail(&cdev->recvqueue, skb);
630 wake_up_interruptible(&cdev->recvwait);
631 return;
632 }
633
634
635 if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) {
636
637 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2);
638#ifdef _DEBUG_DATAFLOW
639 printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n",
640 datahandle, skb->len-CAPIMSG_LEN(skb->data));
641#endif
642 skb_queue_tail(&mp->inqueue, skb);
643 mp->inbytes += skb->len;
644 handle_minor_recv(mp);
645
646 } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) {
647
648 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4);
649#ifdef _DEBUG_DATAFLOW
650 printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n",
651 datahandle,
652 CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2));
653#endif
654 kfree_skb(skb);
655 (void)capiminor_del_ack(mp, datahandle);
656 if (mp->tty)
657 tty_wakeup(mp->tty);
658 (void)handle_minor_send(mp);
659
660 } else {
661 /* ups, let capi application handle it :-) */
662 skb_queue_tail(&cdev->recvqueue, skb);
663 wake_up_interruptible(&cdev->recvwait);
664 }
665#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
666}
667
668/* -------- file_operations for capidev ----------------------------- */
669
670static ssize_t
671capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
672{
673 struct capidev *cdev = (struct capidev *)file->private_data;
674 struct sk_buff *skb;
675 size_t copied;
676
677 if (!cdev->ap.applid)
678 return -ENODEV;
679
680 if ((skb = skb_dequeue(&cdev->recvqueue)) == 0) {
681
682 if (file->f_flags & O_NONBLOCK)
683 return -EAGAIN;
684
685 for (;;) {
686 interruptible_sleep_on(&cdev->recvwait);
687 if ((skb = skb_dequeue(&cdev->recvqueue)) != 0)
688 break;
689 if (signal_pending(current))
690 break;
691 }
692 if (skb == 0)
693 return -ERESTARTNOHAND;
694 }
695 if (skb->len > count) {
696 skb_queue_head(&cdev->recvqueue, skb);
697 return -EMSGSIZE;
698 }
699 if (copy_to_user(buf, skb->data, skb->len)) {
700 skb_queue_head(&cdev->recvqueue, skb);
701 return -EFAULT;
702 }
703 copied = skb->len;
704
705 kfree_skb(skb);
706
707 return copied;
708}
709
710static ssize_t
711capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
712{
713 struct capidev *cdev = (struct capidev *)file->private_data;
714 struct sk_buff *skb;
715 u16 mlen;
716
717 if (!cdev->ap.applid)
718 return -ENODEV;
719
720 skb = alloc_skb(count, GFP_USER);
721 if (!skb)
722 return -ENOMEM;
723
724 if (copy_from_user(skb_put(skb, count), buf, count)) {
725 kfree_skb(skb);
726 return -EFAULT;
727 }
728 mlen = CAPIMSG_LEN(skb->data);
729 if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
730 if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) {
731 kfree_skb(skb);
732 return -EINVAL;
733 }
734 } else {
735 if (mlen != count) {
736 kfree_skb(skb);
737 return -EINVAL;
738 }
739 }
740 CAPIMSG_SETAPPID(skb->data, cdev->ap.applid);
741
742 if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) {
743 down(&cdev->ncci_list_sem);
744 capincci_free(cdev, CAPIMSG_NCCI(skb->data));
745 up(&cdev->ncci_list_sem);
746 }
747
748 cdev->errcode = capi20_put_message(&cdev->ap, skb);
749
750 if (cdev->errcode) {
751 kfree_skb(skb);
752 return -EIO;
753 }
754 return count;
755}
756
757static unsigned int
758capi_poll(struct file *file, poll_table * wait)
759{
760 struct capidev *cdev = (struct capidev *)file->private_data;
761 unsigned int mask = 0;
762
763 if (!cdev->ap.applid)
764 return POLLERR;
765
766 poll_wait(file, &(cdev->recvwait), wait);
767 mask = POLLOUT | POLLWRNORM;
768 if (!skb_queue_empty(&cdev->recvqueue))
769 mask |= POLLIN | POLLRDNORM;
770 return mask;
771}
772
773static int
774capi_ioctl(struct inode *inode, struct file *file,
775 unsigned int cmd, unsigned long arg)
776{
777 struct capidev *cdev = file->private_data;
778 struct capi20_appl *ap = &cdev->ap;
779 capi_ioctl_struct data;
780 int retval = -EINVAL;
781 void __user *argp = (void __user *)arg;
782
783 switch (cmd) {
784 case CAPI_REGISTER:
785 {
786 if (ap->applid)
787 return -EEXIST;
788
789 if (copy_from_user(&cdev->ap.rparam, argp,
790 sizeof(struct capi_register_params)))
791 return -EFAULT;
792
793 cdev->ap.private = cdev;
794 cdev->ap.recv_message = capi_recv_message;
795 cdev->errcode = capi20_register(ap);
796 if (cdev->errcode) {
797 ap->applid = 0;
798 return -EIO;
799 }
800 }
801 return (int)ap->applid;
802
803 case CAPI_GET_VERSION:
804 {
805 if (copy_from_user(&data.contr, argp,
806 sizeof(data.contr)))
807 return -EFAULT;
808 cdev->errcode = capi20_get_version(data.contr, &data.version);
809 if (cdev->errcode)
810 return -EIO;
811 if (copy_to_user(argp, &data.version,
812 sizeof(data.version)))
813 return -EFAULT;
814 }
815 return 0;
816
817 case CAPI_GET_SERIAL:
818 {
819 if (copy_from_user(&data.contr, argp,
820 sizeof(data.contr)))
821 return -EFAULT;
822 cdev->errcode = capi20_get_serial (data.contr, data.serial);
823 if (cdev->errcode)
824 return -EIO;
825 if (copy_to_user(argp, data.serial,
826 sizeof(data.serial)))
827 return -EFAULT;
828 }
829 return 0;
830 case CAPI_GET_PROFILE:
831 {
832 if (copy_from_user(&data.contr, argp,
833 sizeof(data.contr)))
834 return -EFAULT;
835
836 if (data.contr == 0) {
837 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
838 if (cdev->errcode)
839 return -EIO;
840
841 retval = copy_to_user(argp,
842 &data.profile.ncontroller,
843 sizeof(data.profile.ncontroller));
844
845 } else {
846 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
847 if (cdev->errcode)
848 return -EIO;
849
850 retval = copy_to_user(argp, &data.profile,
851 sizeof(data.profile));
852 }
853 if (retval)
854 return -EFAULT;
855 }
856 return 0;
857
858 case CAPI_GET_MANUFACTURER:
859 {
860 if (copy_from_user(&data.contr, argp,
861 sizeof(data.contr)))
862 return -EFAULT;
863 cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer);
864 if (cdev->errcode)
865 return -EIO;
866
867 if (copy_to_user(argp, data.manufacturer,
868 sizeof(data.manufacturer)))
869 return -EFAULT;
870
871 }
872 return 0;
873 case CAPI_GET_ERRCODE:
874 data.errcode = cdev->errcode;
875 cdev->errcode = CAPI_NOERROR;
876 if (arg) {
877 if (copy_to_user(argp, &data.errcode,
878 sizeof(data.errcode)))
879 return -EFAULT;
880 }
881 return data.errcode;
882
883 case CAPI_INSTALLED:
884 if (capi20_isinstalled() == CAPI_NOERROR)
885 return 0;
886 return -ENXIO;
887
888 case CAPI_MANUFACTURER_CMD:
889 {
890 struct capi_manufacturer_cmd mcmd;
891 if (!capable(CAP_SYS_ADMIN))
892 return -EPERM;
893 if (copy_from_user(&mcmd, argp, sizeof(mcmd)))
894 return -EFAULT;
895 return capi20_manufacturer(mcmd.cmd, mcmd.data);
896 }
897 return 0;
898
899 case CAPI_SET_FLAGS:
900 case CAPI_CLR_FLAGS:
901 {
902 unsigned userflags;
903 if (copy_from_user(&userflags, argp,
904 sizeof(userflags)))
905 return -EFAULT;
906 if (cmd == CAPI_SET_FLAGS)
907 cdev->userflags |= userflags;
908 else
909 cdev->userflags &= ~userflags;
910 }
911 return 0;
912
913 case CAPI_GET_FLAGS:
914 if (copy_to_user(argp, &cdev->userflags,
915 sizeof(cdev->userflags)))
916 return -EFAULT;
917 return 0;
918
919 case CAPI_NCCI_OPENCOUNT:
920 {
921 struct capincci *nccip;
922#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
923 struct capiminor *mp;
924#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
925 unsigned ncci;
926 int count = 0;
927 if (copy_from_user(&ncci, argp, sizeof(ncci)))
928 return -EFAULT;
929
930 down(&cdev->ncci_list_sem);
931 if ((nccip = capincci_find(cdev, (u32) ncci)) == 0) {
932 up(&cdev->ncci_list_sem);
933 return 0;
934 }
935#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
936 if ((mp = nccip->minorp) != 0) {
937 count += atomic_read(&mp->ttyopencount);
938 }
939#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
940 up(&cdev->ncci_list_sem);
941 return count;
942 }
943 return 0;
944
945#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
946 case CAPI_NCCI_GETUNIT:
947 {
948 struct capincci *nccip;
949 struct capiminor *mp;
950 unsigned ncci;
951 int unit = 0;
952 if (copy_from_user(&ncci, argp,
953 sizeof(ncci)))
954 return -EFAULT;
955 down(&cdev->ncci_list_sem);
956 nccip = capincci_find(cdev, (u32) ncci);
957 if (!nccip || (mp = nccip->minorp) == 0) {
958 up(&cdev->ncci_list_sem);
959 return -ESRCH;
960 }
961 unit = mp->minor;
962 up(&cdev->ncci_list_sem);
963 return unit;
964 }
965 return 0;
966#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
967 }
968 return -EINVAL;
969}
970
971static int
972capi_open(struct inode *inode, struct file *file)
973{
974 if (file->private_data)
975 return -EEXIST;
976
977 if ((file->private_data = capidev_alloc()) == 0)
978 return -ENOMEM;
979
980 return nonseekable_open(inode, file);
981}
982
983static int
984capi_release(struct inode *inode, struct file *file)
985{
986 struct capidev *cdev = (struct capidev *)file->private_data;
987
988 capidev_free(cdev);
989 file->private_data = NULL;
990
991 return 0;
992}
993
994static struct file_operations capi_fops =
995{
996 .owner = THIS_MODULE,
997 .llseek = no_llseek,
998 .read = capi_read,
999 .write = capi_write,
1000 .poll = capi_poll,
1001 .ioctl = capi_ioctl,
1002 .open = capi_open,
1003 .release = capi_release,
1004};
1005
1006#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1007/* -------- tty_operations for capincci ----------------------------- */
1008
1009static int capinc_tty_open(struct tty_struct * tty, struct file * file)
1010{
1011 struct capiminor *mp;
1012
4482dfad 1013 if ((mp = capiminor_find(iminor(file->f_path.dentry->d_inode))) == 0)
1da177e4
LT		 1014 return -ENXIO;
1015 if (mp->nccip == 0)
1016 return -ENXIO;
1017
1018 tty->driver_data = (void *)mp;
1019
1020 if (atomic_read(&mp->ttyopencount) == 0)
1021 mp->tty = tty;
1022 atomic_inc(&mp->ttyopencount);
1023#ifdef _DEBUG_REFCOUNT
1024 printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount));
1025#endif
1026 handle_minor_recv(mp);
1027 return 0;
1028}
1029
1030static void capinc_tty_close(struct tty_struct * tty, struct file * file)
1031{
1032 struct capiminor *mp;
1033
1034 mp = (struct capiminor *)tty->driver_data;
1035 if (mp) {
1036 if (atomic_dec_and_test(&mp->ttyopencount)) {
1037#ifdef _DEBUG_REFCOUNT
1038 printk(KERN_DEBUG "capinc_tty_close lastclose\n");
1039#endif
1040 tty->driver_data = NULL;
1041 mp->tty = NULL;
1042 }
1043#ifdef _DEBUG_REFCOUNT
1044 printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount));
1045#endif
1046 if (mp->nccip == 0)
1047 capiminor_free(mp);
1048 }
1049
1050#ifdef _DEBUG_REFCOUNT
1051 printk(KERN_DEBUG "capinc_tty_close\n");
1052#endif
1053}
1054
1055static int capinc_tty_write(struct tty_struct * tty,
1056 const unsigned char *buf, int count)
1057{
1058 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1059 struct sk_buff *skb;
1060
1061#ifdef _DEBUG_TTYFUNCS
1062 printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count);
1063#endif
1064
1065 if (!mp || !mp->nccip) {
1066#ifdef _DEBUG_TTYFUNCS
1067 printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n");
1068#endif
1069 return 0;
1070 }
1071
1072 skb = mp->ttyskb;
1073 if (skb) {
1074 mp->ttyskb = NULL;
1075 skb_queue_tail(&mp->outqueue, skb);
1076 mp->outbytes += skb->len;
1077 }
1078
1079 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC);
1080 if (!skb) {
1081 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
1082 return -ENOMEM;
1083 }
1084
1085 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1086 memcpy(skb_put(skb, count), buf, count);
1087
1088 skb_queue_tail(&mp->outqueue, skb);
1089 mp->outbytes += skb->len;
1090 (void)handle_minor_send(mp);
1091 (void)handle_minor_recv(mp);
1092 return count;
1093}
1094
1095static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
1096{
1097 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1098 struct sk_buff *skb;
1099
1100#ifdef _DEBUG_TTYFUNCS
1101 printk(KERN_DEBUG "capinc_put_char(%u)\n", ch);
1102#endif
1103
1104 if (!mp || !mp->nccip) {
1105#ifdef _DEBUG_TTYFUNCS
1106 printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n");
1107#endif
1108 return;
1109 }
1110
1111 skb = mp->ttyskb;
1112 if (skb) {
1113 if (skb_tailroom(skb) > 0) {
1114 *(skb_put(skb, 1)) = ch;
1115 return;
1116 }
1117 mp->ttyskb = NULL;
1118 skb_queue_tail(&mp->outqueue, skb);
1119 mp->outbytes += skb->len;
1120 (void)handle_minor_send(mp);
1121 }
1122 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC);
1123 if (skb) {
1124 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1125 *(skb_put(skb, 1)) = ch;
1126 mp->ttyskb = skb;
1127 } else {
1128 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
1129 }
1130}
1131
1132static void capinc_tty_flush_chars(struct tty_struct *tty)
1133{
1134 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1135 struct sk_buff *skb;
1136
1137#ifdef _DEBUG_TTYFUNCS
1138 printk(KERN_DEBUG "capinc_tty_flush_chars\n");
1139#endif
1140
1141 if (!mp || !mp->nccip) {
1142#ifdef _DEBUG_TTYFUNCS
1143 printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n");
1144#endif
1145 return;
1146 }
1147
1148 skb = mp->ttyskb;
1149 if (skb) {
1150 mp->ttyskb = NULL;
1151 skb_queue_tail(&mp->outqueue, skb);
1152 mp->outbytes += skb->len;
1153 (void)handle_minor_send(mp);
1154 }
1155 (void)handle_minor_recv(mp);
1156}
1157
1158static int capinc_tty_write_room(struct tty_struct *tty)
1159{
1160 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1161 int room;
1162 if (!mp || !mp->nccip) {
1163#ifdef _DEBUG_TTYFUNCS
1164 printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n");
1165#endif
1166 return 0;
1167 }
1168 room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
1169 room *= CAPI_MAX_BLKSIZE;
1170#ifdef _DEBUG_TTYFUNCS
1171 printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room);
1172#endif
1173 return room;
1174}
1175
408b664a 1176static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
1da177e4
LT		 1177{
1178 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1179 if (!mp || !mp->nccip) {
1180#ifdef _DEBUG_TTYFUNCS
1181 printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n");
1182#endif
1183 return 0;
1184 }
1185#ifdef _DEBUG_TTYFUNCS
1186 printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
1187 mp->outbytes, mp->nack,
1188 skb_queue_len(&mp->outqueue),
1189 skb_queue_len(&mp->inqueue));
1190#endif
1191 return mp->outbytes;
1192}
1193
1194static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file,
1195 unsigned int cmd, unsigned long arg)
1196{
1197 int error = 0;
1198 switch (cmd) {
1199 default:
1200 error = n_tty_ioctl (tty, file, cmd, arg);
1201 break;
1202 }
1203 return error;
1204}
1205
1206static void capinc_tty_set_termios(struct tty_struct *tty, struct termios * old)
1207{
1208#ifdef _DEBUG_TTYFUNCS
1209 printk(KERN_DEBUG "capinc_tty_set_termios\n");
1210#endif
1211}
1212
1213static void capinc_tty_throttle(struct tty_struct * tty)
1214{
1215 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1216#ifdef _DEBUG_TTYFUNCS
1217 printk(KERN_DEBUG "capinc_tty_throttle\n");
1218#endif
1219 if (mp)
1220 mp->ttyinstop = 1;
1221}
1222
1223static void capinc_tty_unthrottle(struct tty_struct * tty)
1224{
1225 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1226#ifdef _DEBUG_TTYFUNCS
1227 printk(KERN_DEBUG "capinc_tty_unthrottle\n");
1228#endif
1229 if (mp) {
1230 mp->ttyinstop = 0;
1231 handle_minor_recv(mp);
1232 }
1233}
1234
1235static void capinc_tty_stop(struct tty_struct *tty)
1236{
1237 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1238#ifdef _DEBUG_TTYFUNCS
1239 printk(KERN_DEBUG "capinc_tty_stop\n");
1240#endif
1241 if (mp) {
1242 mp->ttyoutstop = 1;
1243 }
1244}
1245
1246static void capinc_tty_start(struct tty_struct *tty)
1247{
1248 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1249#ifdef _DEBUG_TTYFUNCS
1250 printk(KERN_DEBUG "capinc_tty_start\n");
1251#endif
1252 if (mp) {
1253 mp->ttyoutstop = 0;
1254 (void)handle_minor_send(mp);
1255 }
1256}
1257
1258static void capinc_tty_hangup(struct tty_struct *tty)
1259{
1260#ifdef _DEBUG_TTYFUNCS
1261 printk(KERN_DEBUG "capinc_tty_hangup\n");
1262#endif
1263}
1264
1265static void capinc_tty_break_ctl(struct tty_struct *tty, int state)
1266{
1267#ifdef _DEBUG_TTYFUNCS
1268 printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state);
1269#endif
1270}
1271
1272static void capinc_tty_flush_buffer(struct tty_struct *tty)
1273{
1274#ifdef _DEBUG_TTYFUNCS
1275 printk(KERN_DEBUG "capinc_tty_flush_buffer\n");
1276#endif
1277}
1278
1279static void capinc_tty_set_ldisc(struct tty_struct *tty)
1280{
1281#ifdef _DEBUG_TTYFUNCS
1282 printk(KERN_DEBUG "capinc_tty_set_ldisc\n");
1283#endif
1284}
1285
1286static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
1287{
1288#ifdef _DEBUG_TTYFUNCS
1289 printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch);
1290#endif
1291}
1292
1293static int capinc_tty_read_proc(char *page, char **start, off_t off,
1294 int count, int *eof, void *data)
1295{
1296 return 0;
1297}
1298
1299static struct tty_driver *capinc_tty_driver;
1300
b68e31d0 1301static const struct tty_operations capinc_ops = {
1da177e4
LT		 1302 .open = capinc_tty_open,
1303 .close = capinc_tty_close,
1304 .write = capinc_tty_write,
1305 .put_char = capinc_tty_put_char,
1306 .flush_chars = capinc_tty_flush_chars,
1307 .write_room = capinc_tty_write_room,
1308 .chars_in_buffer = capinc_tty_chars_in_buffer,
1309 .ioctl = capinc_tty_ioctl,
1310 .set_termios = capinc_tty_set_termios,
1311 .throttle = capinc_tty_throttle,
1312 .unthrottle = capinc_tty_unthrottle,
1313 .stop = capinc_tty_stop,
1314 .start = capinc_tty_start,
1315 .hangup = capinc_tty_hangup,
1316 .break_ctl = capinc_tty_break_ctl,
1317 .flush_buffer = capinc_tty_flush_buffer,
1318 .set_ldisc = capinc_tty_set_ldisc,
1319 .send_xchar = capinc_tty_send_xchar,
1320 .read_proc = capinc_tty_read_proc,
1321};
1322
1323static int capinc_tty_init(void)
1324{
1325 struct tty_driver *drv;
1326
1327 if (capi_ttyminors > CAPINC_MAX_PORTS)
1328 capi_ttyminors = CAPINC_MAX_PORTS;
1329 if (capi_ttyminors <= 0)
1330 capi_ttyminors = CAPINC_NR_PORTS;
1331
1332 drv = alloc_tty_driver(capi_ttyminors);
1333 if (!drv)
1334 return -ENOMEM;
1335
1336 drv->owner = THIS_MODULE;
1337 drv->driver_name = "capi_nc";
1da177e4
LT		 1338 drv->name = "capi";
1339 drv->major = capi_ttymajor;
1340 drv->minor_start = 0;
1341 drv->type = TTY_DRIVER_TYPE_SERIAL;
1342 drv->subtype = SERIAL_TYPE_NORMAL;
1343 drv->init_termios = tty_std_termios;
1344 drv->init_termios.c_iflag = ICRNL;
1345 drv->init_termios.c_oflag = OPOST | ONLCR;
1346 drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1347 drv->init_termios.c_lflag = 0;
1348 drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS;
1349 tty_set_operations(drv, &capinc_ops);
1350 if (tty_register_driver(drv)) {
1351 put_tty_driver(drv);
1352 printk(KERN_ERR "Couldn't register capi_nc driver\n");
1353 return -1;
1354 }
1355 capinc_tty_driver = drv;
1356 return 0;
1357}
1358
1359static void capinc_tty_exit(void)
1360{
1361 struct tty_driver *drv = capinc_tty_driver;
1362 int retval;
1363 if ((retval = tty_unregister_driver(drv)))
1364 printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval);
1365 put_tty_driver(drv);
1366}
1367
1368#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
1369
1370/* -------- /proc functions ----------------------------------------- */
1371
1372/*
1373 * /proc/capi/capi20:
1374 * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
1375 */
1376static int proc_capidev_read_proc(char *page, char **start, off_t off,
1377 int count, int *eof, void *data)
1378{
1379 struct capidev *cdev;
1380 struct list_head *l;
1381 int len = 0;
1382
1383 read_lock(&capidev_list_lock);
1384 list_for_each(l, &capidev_list) {
1385 cdev = list_entry(l, struct capidev, list);
1386 len += sprintf(page+len, "0 %d %lu %lu %lu %lu\n",
1387 cdev->ap.applid,
1388 cdev->ap.nrecvctlpkt,
1389 cdev->ap.nrecvdatapkt,
1390 cdev->ap.nsentctlpkt,
1391 cdev->ap.nsentdatapkt);
1392 if (len <= off) {
1393 off -= len;
1394 len = 0;
1395 } else {
1396 if (len-off > count)
1397 goto endloop;
1398 }
1399 }
1400
1401endloop:
1402 read_unlock(&capidev_list_lock);
1403 if (len < count)
1404 *eof = 1;
1405 if (len > count) len = count;
1406 if (len < 0) len = 0;
1407 return len;
1408}
1409
1410/*
1411 * /proc/capi/capi20ncci:
1412 * applid ncci
1413 */
1414static int proc_capincci_read_proc(char *page, char **start, off_t off,
1415 int count, int *eof, void *data)
1416{
1417 struct capidev *cdev;
1418 struct capincci *np;
1419 struct list_head *l;
1420 int len = 0;
1421
1422 read_lock(&capidev_list_lock);
1423 list_for_each(l, &capidev_list) {
1424 cdev = list_entry(l, struct capidev, list);
1425 for (np=cdev->nccis; np; np = np->next) {
1426 len += sprintf(page+len, "%d 0x%x\n",
1427 cdev->ap.applid,
1428 np->ncci);
1429 if (len <= off) {
1430 off -= len;
1431 len = 0;
1432 } else {
1433 if (len-off > count)
1434 goto endloop;
1435 }
1436 }
1437 }
1438endloop:
1439 read_unlock(&capidev_list_lock);
1440 *start = page+off;
1441 if (len < count)
1442 *eof = 1;
1443 if (len>count) len = count;
1444 if (len<0) len = 0;
1445 return len;
1446}
1447
1448static struct procfsentries {
1449 char *name;
1450 mode_t mode;
1451 int (*read_proc)(char *page, char **start, off_t off,
1452 int count, int *eof, void *data);
1453 struct proc_dir_entry *procent;
1454} procfsentries[] = {
1455 /* { "capi", S_IFDIR, 0 }, */
1456 { "capi/capi20", 0 , proc_capidev_read_proc },
1457 { "capi/capi20ncci", 0 , proc_capincci_read_proc },
1458};
1459
1460static void __init proc_init(void)
1461{
1462 int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
1463 int i;
1464
1465 for (i=0; i < nelem; i++) {
1466 struct procfsentries *p = procfsentries + i;
1467 p->procent = create_proc_entry(p->name, p->mode, NULL);
1468 if (p->procent) p->procent->read_proc = p->read_proc;
1469 }
1470}
1471
1472static void __exit proc_exit(void)
1473{
1474 int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
1475 int i;
1476
1477 for (i=nelem-1; i >= 0; i--) {
1478 struct procfsentries *p = procfsentries + i;
1479 if (p->procent) {
1480 remove_proc_entry(p->name, NULL);
1481 p->procent = NULL;
1482 }
1483 }
1484}
1485
1486/* -------- init function and module interface ---------------------- */
1487
1488
1489static char rev[32];
1490
1491static int __init capi_init(void)
1492{
1493 char *p;
1494 char *compileinfo;
6d9eac34 1495 int major_ret;
1da177e4
LT		 1496
1497 if ((p = strchr(revision, ':')) != 0 && p[1]) {
1498 strlcpy(rev, p + 2, sizeof(rev));
1499 if ((p = strchr(rev, '$')) != 0 && p > rev)
1500 *(p-1) = 0;
1501 } else
1502 strcpy(rev, "1.0");
1503
6d9eac34
AM		 1504 major_ret = register_chrdev(capi_major, "capi20", &capi_fops);
1505 if (major_ret < 0) {
1da177e4 1506 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
6d9eac34 1507 return major_ret;
1da177e4 1508 }
56b22935 1509 capi_class = class_create(THIS_MODULE, "capi");
1da177e4
LT		 1510 if (IS_ERR(capi_class)) {
1511 unregister_chrdev(capi_major, "capi20");
1512 return PTR_ERR(capi_class);
1513 }
1514
53f46542 1515 class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
1da177e4
LT		 1516
1517#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1518 if (capinc_tty_init() < 0) {
56b22935 1519 class_device_destroy(capi_class, MKDEV(capi_major, 0));
1520 class_destroy(capi_class);
1da177e4
LT		 1521 unregister_chrdev(capi_major, "capi20");
1522 return -ENOMEM;
1523 }
1524#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
1525
1526 proc_init();
1527
1528#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1529#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
1530 compileinfo = " (middleware+capifs)";
1531#else
1532 compileinfo = " (no capifs)";
1533#endif
1534#else
1535 compileinfo = " (no middleware)";
1536#endif
1537 printk(KERN_NOTICE "capi20: Rev %s: started up with major %d%s\n",
1538 rev, capi_major, compileinfo);
1539
1540 return 0;
1541}
1542
1543static void __exit capi_exit(void)
1544{
1545 proc_exit();
1546
56b22935 1547 class_device_destroy(capi_class, MKDEV(capi_major, 0));
1548 class_destroy(capi_class);
1da177e4 1549 unregister_chrdev(capi_major, "capi20");
1da177e4
LT		 1550
1551#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1552 capinc_tty_exit();
1553#endif
1554 printk(KERN_NOTICE "capi: Rev %s: unloaded\n", rev);
1555}
1556
1557module_init(capi_init);
1558module_exit(capi_exit);
Linux kernel - Deliverables
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