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header cleaning: don't include smp_lock.h when not used
[GitHub/MotorolaMobilityLLC/kernel-slsi.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>
1da177e4
LT		 22#include <linux/timer.h>
23#include <linux/wait.h>
24#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
25#include <linux/tty.h>
26#ifdef CONFIG_PPP
27#include <linux/netdevice.h>
28#include <linux/ppp_defs.h>
29#include <linux/if_ppp.h>
30#endif /* CONFIG_PPP */
31#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
32#include <linux/skbuff.h>
33#include <linux/proc_fs.h>
34#include <linux/poll.h>
35#include <linux/capi.h>
36#include <linux/kernelcapi.h>
37#include <linux/init.h>
38#include <linux/device.h>
39#include <linux/moduleparam.h>
1da177e4
LT		 40#include <linux/isdn/capiutil.h>
41#include <linux/isdn/capicmd.h>
42#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
43#include "capifs.h"
44#endif
45
46static char *revision = "$Revision: 1.1.2.7 $";
47
48MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
49MODULE_AUTHOR("Carsten Paeth");
50MODULE_LICENSE("GPL");
51
52#undef _DEBUG_REFCOUNT /* alloc/free and open/close debug */
53#undef _DEBUG_TTYFUNCS /* call to tty_driver */
54#undef _DEBUG_DATAFLOW /* data flow */
55
56/* -------- driver information -------------------------------------- */
57
56b22935 58static struct class *capi_class;
1da177e4 59
408b664a 60static int capi_major = 68; /* allocated */
1da177e4
LT		 61#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
62#define CAPINC_NR_PORTS 32
63#define CAPINC_MAX_PORTS 256
408b664a
AB		 64static int capi_ttymajor = 191;
65static int capi_ttyminors = CAPINC_NR_PORTS;
1da177e4
LT		 66#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
67
68module_param_named(major, capi_major, uint, 0);
69#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
70module_param_named(ttymajor, capi_ttymajor, uint, 0);
71module_param_named(ttyminors, capi_ttyminors, uint, 0);
72#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
73
74/* -------- defines ------------------------------------------------- */
75
76#define CAPINC_MAX_RECVQUEUE 10
77#define CAPINC_MAX_SENDQUEUE 10
78#define CAPI_MAX_BLKSIZE 2048
79
80/* -------- data structures ----------------------------------------- */
81
82struct capidev;
83struct capincci;
84#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
85struct capiminor;
86
6aa65472
MB		 87struct datahandle_queue {
88 struct list_head list;
89 u16 datahandle;
90};
91
1da177e4
LT		 92struct capiminor {
93 struct list_head list;
94 struct capincci *nccip;
95 unsigned int minor;
96
97 struct capi20_appl *ap;
98 u32 ncci;
99 u16 datahandle;
100 u16 msgid;
101
102 struct tty_struct *tty;
103 int ttyinstop;
104 int ttyoutstop;
105 struct sk_buff *ttyskb;
106 atomic_t ttyopencount;
107
108 struct sk_buff_head inqueue;
109 int inbytes;
110 struct sk_buff_head outqueue;
111 int outbytes;
112
113 /* transmit path */
6aa65472 114 struct list_head ackqueue;
1da177e4 115 int nack;
6aa65472 116 spinlock_t ackqlock;
1da177e4
LT		 117};
118#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
119
053b47ff
MB		 120/* FIXME: The following lock is a sledgehammer-workaround to a
121 * locking issue with the capiminor (and maybe other) data structure(s).
122 * Access to this data is done in a racy way and crashes the machine with
123 * a FritzCard DSL driver; sooner or later. This is a workaround
124 * which trades scalability vs stability, so it doesn't crash the kernel anymore.
125 * The correct (and scalable) fix for the issue seems to require
126 * an API change to the drivers... . */
127static DEFINE_SPINLOCK(workaround_lock);
128
1da177e4
LT		 129struct capincci {
130 struct capincci *next;
131 u32 ncci;
132 struct capidev *cdev;
133#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
134 struct capiminor *minorp;
135#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
136};
137
138struct capidev {
139 struct list_head list;
140 struct capi20_appl ap;
141 u16 errcode;
142 unsigned userflags;
143
144 struct sk_buff_head recvqueue;
145 wait_queue_head_t recvwait;
146
147 struct capincci *nccis;
148
149 struct semaphore ncci_list_sem;
150};
151
152/* -------- global variables ---------------------------------------- */
153
154static DEFINE_RWLOCK(capidev_list_lock);
155static LIST_HEAD(capidev_list);
156
157#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
158static DEFINE_RWLOCK(capiminor_list_lock);
159static LIST_HEAD(capiminor_list);
160#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
161
162#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
163/* -------- datahandles --------------------------------------------- */
164
165static int capincci_add_ack(struct capiminor *mp, u16 datahandle)
166{
6aa65472
MB		 167 struct datahandle_queue *n;
168 unsigned long flags;
1da177e4
LT		 169
170 n = kmalloc(sizeof(*n), GFP_ATOMIC);
6aa65472
MB		 171 if (unlikely(!n)) {
172 printk(KERN_ERR "capi: alloc datahandle failed\n");
173 return -1;
1da177e4 174 }
1da177e4 175 n->datahandle = datahandle;
6aa65472
MB		 176 INIT_LIST_HEAD(&n->list);
177 spin_lock_irqsave(&mp->ackqlock, flags);
178 list_add_tail(&n->list, &mp->ackqueue);
1da177e4 179 mp->nack++;
6aa65472 180 spin_unlock_irqrestore(&mp->ackqlock, flags);
1da177e4
LT		 181 return 0;
182}
183
184static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
185{
6aa65472
MB		 186 struct datahandle_queue *p, *tmp;
187 unsigned long flags;
1da177e4 188
6aa65472
MB		 189 spin_lock_irqsave(&mp->ackqlock, flags);
190 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
191 if (p->datahandle == datahandle) {
192 list_del(&p->list);
1da177e4
LT		 193 kfree(p);
194 mp->nack--;
6aa65472 195 spin_unlock_irqrestore(&mp->ackqlock, flags);
1da177e4
LT		 196 return 0;
197 }
198 }
6aa65472 199 spin_unlock_irqrestore(&mp->ackqlock, flags);
1da177e4
LT		 200 return -1;
201}
202
203static void capiminor_del_all_ack(struct capiminor *mp)
204{
6aa65472
MB		 205 struct datahandle_queue *p, *tmp;
206 unsigned long flags;
1da177e4 207
6aa65472
MB		 208 spin_lock_irqsave(&mp->ackqlock, flags);
209 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
210 list_del(&p->list);
1da177e4
LT		 211 kfree(p);
212 mp->nack--;
213 }
6aa65472 214 spin_unlock_irqrestore(&mp->ackqlock, flags);
1da177e4
LT		 215}
216
217
218/* -------- struct capiminor ---------------------------------------- */
219
220static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
221{
222 struct capiminor *mp, *p;
223 unsigned int minor = 0;
224 unsigned long flags;
225
41f96935 226 mp = kzalloc(sizeof(*mp), GFP_ATOMIC);
1da177e4
LT		 227 if (!mp) {
228 printk(KERN_ERR "capi: can't alloc capiminor\n");
229 return NULL;
230 }
231
1da177e4
LT		 232 mp->ap = ap;
233 mp->ncci = ncci;
234 mp->msgid = 0;
235 atomic_set(&mp->ttyopencount,0);
6aa65472
MB		 236 INIT_LIST_HEAD(&mp->ackqueue);
237 spin_lock_init(&mp->ackqlock);
1da177e4
LT		 238
239 skb_queue_head_init(&mp->inqueue);
240 skb_queue_head_init(&mp->outqueue);
241
242 /* Allocate the least unused minor number.
243 */
244 write_lock_irqsave(&capiminor_list_lock, flags);
245 if (list_empty(&capiminor_list))
246 list_add(&mp->list, &capiminor_list);
247 else {
248 list_for_each_entry(p, &capiminor_list, list) {
249 if (p->minor > minor)
250 break;
251 minor++;
252 }
253
254 if (minor < capi_ttyminors) {
255 mp->minor = minor;
256 list_add(&mp->list, p->list.prev);
257 }
258 }
259 write_unlock_irqrestore(&capiminor_list_lock, flags);
260
261 if (!(minor < capi_ttyminors)) {
262 printk(KERN_NOTICE "capi: out of minors\n");
263 kfree(mp);
264 return NULL;
265 }
266
267 return mp;
268}
269
270static void capiminor_free(struct capiminor *mp)
271{
272 unsigned long flags;
273
274 write_lock_irqsave(&capiminor_list_lock, flags);
275 list_del(&mp->list);
276 write_unlock_irqrestore(&capiminor_list_lock, flags);
277
278 if (mp->ttyskb) kfree_skb(mp->ttyskb);
279 mp->ttyskb = NULL;
280 skb_queue_purge(&mp->inqueue);
281 skb_queue_purge(&mp->outqueue);
282 capiminor_del_all_ack(mp);
283 kfree(mp);
284}
285
408b664a 286static struct capiminor *capiminor_find(unsigned int minor)
1da177e4
LT		 287{
288 struct list_head *l;
289 struct capiminor *p = NULL;
290
291 read_lock(&capiminor_list_lock);
292 list_for_each(l, &capiminor_list) {
293 p = list_entry(l, struct capiminor, list);
294 if (p->minor == minor)
295 break;
296 }
297 read_unlock(&capiminor_list_lock);
298 if (l == &capiminor_list)
299 return NULL;
300
301 return p;
302}
303#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
304
305/* -------- struct capincci ----------------------------------------- */
306
307static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
308{
309 struct capincci *np, **pp;
310#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
311 struct capiminor *mp = NULL;
312#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
313
41f96935 314 np = kzalloc(sizeof(*np), GFP_ATOMIC);
1da177e4
LT		 315 if (!np)
316 return NULL;
1da177e4
LT		 317 np->ncci = ncci;
318 np->cdev = cdev;
319#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
320 mp = NULL;
321 if (cdev->userflags & CAPIFLAG_HIGHJACKING)
322 mp = np->minorp = capiminor_alloc(&cdev->ap, ncci);
323 if (mp) {
324 mp->nccip = np;
325#ifdef _DEBUG_REFCOUNT
326 printk(KERN_DEBUG "set mp->nccip\n");
327#endif
328#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
329 capifs_new_ncci(mp->minor, MKDEV(capi_ttymajor, mp->minor));
330#endif
331 }
332#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
333 for (pp=&cdev->nccis; *pp; pp = &(*pp)->next)
334 ;
335 *pp = np;
336 return np;
337}
338
339static void capincci_free(struct capidev *cdev, u32 ncci)
340{
341 struct capincci *np, **pp;
342#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
343 struct capiminor *mp;
344#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
345
346 pp=&cdev->nccis;
347 while (*pp) {
348 np = *pp;
349 if (ncci == 0xffffffff || np->ncci == ncci) {
350 *pp = (*pp)->next;
351#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
352 if ((mp = np->minorp) != 0) {
353#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
354 capifs_free_ncci(mp->minor);
355#endif
356 if (mp->tty) {
357 mp->nccip = NULL;
358#ifdef _DEBUG_REFCOUNT
359 printk(KERN_DEBUG "reset mp->nccip\n");
360#endif
361 tty_hangup(mp->tty);
362 } else {
363 capiminor_free(mp);
364 }
365 }
366#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
367 kfree(np);
368 if (*pp == 0) return;
369 } else {
370 pp = &(*pp)->next;
371 }
372 }
373}
374
375static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
376{
377 struct capincci *p;
378
379 for (p=cdev->nccis; p ; p = p->next) {
380 if (p->ncci == ncci)
381 break;
382 }
383 return p;
384}
385
386/* -------- struct capidev ------------------------------------------ */
387
388static struct capidev *capidev_alloc(void)
389{
390 struct capidev *cdev;
391 unsigned long flags;
392
41f96935 393 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
1da177e4
LT		 394 if (!cdev)
395 return NULL;
1da177e4
LT		 396
397 init_MUTEX(&cdev->ncci_list_sem);
398 skb_queue_head_init(&cdev->recvqueue);
399 init_waitqueue_head(&cdev->recvwait);
400 write_lock_irqsave(&capidev_list_lock, flags);
401 list_add_tail(&cdev->list, &capidev_list);
402 write_unlock_irqrestore(&capidev_list_lock, flags);
403 return cdev;
404}
405
406static void capidev_free(struct capidev *cdev)
407{
408 unsigned long flags;
409
410 if (cdev->ap.applid) {
411 capi20_release(&cdev->ap);
412 cdev->ap.applid = 0;
413 }
414 skb_queue_purge(&cdev->recvqueue);
415
416 down(&cdev->ncci_list_sem);
417 capincci_free(cdev, 0xffffffff);
418 up(&cdev->ncci_list_sem);
419
420 write_lock_irqsave(&capidev_list_lock, flags);
421 list_del(&cdev->list);
422 write_unlock_irqrestore(&capidev_list_lock, flags);
423 kfree(cdev);
424}
425
426#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
427/* -------- handle data queue --------------------------------------- */
428
429static struct sk_buff *
430gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb)
431{
432 struct sk_buff *nskb;
433 nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC);
434 if (nskb) {
435 u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2);
436 unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN);
437 capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN);
438 capimsg_setu16(s, 2, mp->ap->applid);
439 capimsg_setu8 (s, 4, CAPI_DATA_B3);
440 capimsg_setu8 (s, 5, CAPI_RESP);
441 capimsg_setu16(s, 6, mp->msgid++);
442 capimsg_setu32(s, 8, mp->ncci);
443 capimsg_setu16(s, 12, datahandle);
444 }
445 return nskb;
446}
447
448static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb)
449{
450 struct sk_buff *nskb;
451 int datalen;
452 u16 errcode, datahandle;
453 struct tty_ldisc *ld;
454
455 datalen = skb->len - CAPIMSG_LEN(skb->data);
456 if (mp->tty == NULL)
457 {
458#ifdef _DEBUG_DATAFLOW
459 printk(KERN_DEBUG "capi: currently no receiver\n");
460#endif
461 return -1;
462 }
463
464 ld = tty_ldisc_ref(mp->tty);
465 if (ld == NULL)
466 return -1;
467 if (ld->receive_buf == NULL) {
468#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
469 printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n");
470#endif
471 goto bad;
472 }
473 if (mp->ttyinstop) {
474#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
475 printk(KERN_DEBUG "capi: recv tty throttled\n");
476#endif
477 goto bad;
478 }
33f0f88f 479 if (mp->tty->receive_room < datalen) {
1da177e4
LT		 480#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
481 printk(KERN_DEBUG "capi: no room in tty\n");
482#endif
483 goto bad;
484 }
485 if ((nskb = gen_data_b3_resp_for(mp, skb)) == 0) {
486 printk(KERN_ERR "capi: gen_data_b3_resp failed\n");
487 goto bad;
488 }
489 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4);
490 errcode = capi20_put_message(mp->ap, nskb);
491 if (errcode != CAPI_NOERROR) {
492 printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n",
493 errcode);
494 kfree_skb(nskb);
495 goto bad;
496 }
497 (void)skb_pull(skb, CAPIMSG_LEN(skb->data));
498#ifdef _DEBUG_DATAFLOW
499 printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n",
500 datahandle, skb->len);
501#endif
502 ld->receive_buf(mp->tty, skb->data, NULL, skb->len);
503 kfree_skb(skb);
504 tty_ldisc_deref(ld);
505 return 0;
506bad:
507 tty_ldisc_deref(ld);
508 return -1;
509}
510
511static void handle_minor_recv(struct capiminor *mp)
512{
513 struct sk_buff *skb;
514 while ((skb = skb_dequeue(&mp->inqueue)) != 0) {
515 unsigned int len = skb->len;
516 mp->inbytes -= len;
517 if (handle_recv_skb(mp, skb) < 0) {
518 skb_queue_head(&mp->inqueue, skb);
519 mp->inbytes += len;
520 return;
521 }
522 }
523}
524
525static int handle_minor_send(struct capiminor *mp)
526{
527 struct sk_buff *skb;
528 u16 len;
529 int count = 0;
530 u16 errcode;
531 u16 datahandle;
532
533 if (mp->tty && mp->ttyoutstop) {
534#if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
535 printk(KERN_DEBUG "capi: send: tty stopped\n");
536#endif
537 return 0;
538 }
539
540 while ((skb = skb_dequeue(&mp->outqueue)) != 0) {
541 datahandle = mp->datahandle;
542 len = (u16)skb->len;
543 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
544 memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
545 capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
546 capimsg_setu16(skb->data, 2, mp->ap->applid);
547 capimsg_setu8 (skb->data, 4, CAPI_DATA_B3);
548 capimsg_setu8 (skb->data, 5, CAPI_REQ);
549 capimsg_setu16(skb->data, 6, mp->msgid++);
550 capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */
551 capimsg_setu32(skb->data, 12, (u32) skb->data); /* Data32 */
552 capimsg_setu16(skb->data, 16, len); /* Data length */
553 capimsg_setu16(skb->data, 18, datahandle);
554 capimsg_setu16(skb->data, 20, 0); /* Flags */
555
556 if (capincci_add_ack(mp, datahandle) < 0) {
557 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
558 skb_queue_head(&mp->outqueue, skb);
559 return count;
560 }
561 errcode = capi20_put_message(mp->ap, skb);
562 if (errcode == CAPI_NOERROR) {
563 mp->datahandle++;
564 count++;
565 mp->outbytes -= len;
566#ifdef _DEBUG_DATAFLOW
567 printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n",
568 datahandle, len);
569#endif
570 continue;
571 }
572 capiminor_del_ack(mp, datahandle);
573
574 if (errcode == CAPI_SENDQUEUEFULL) {
575 skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
576 skb_queue_head(&mp->outqueue, skb);
577 break;
578 }
579
580 /* ups, drop packet */
581 printk(KERN_ERR "capi: put_message = %x\n", errcode);
582 mp->outbytes -= len;
583 kfree_skb(skb);
584 }
585 return count;
586}
587
588#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
589/* -------- function called by lower level -------------------------- */
590
591static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
592{
593 struct capidev *cdev = ap->private;
594#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
595 struct capiminor *mp;
596 u16 datahandle;
597#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
598 struct capincci *np;
599 u32 ncci;
053b47ff 600 unsigned long flags;
1da177e4
LT		 601
602 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) {
603 u16 info = CAPIMSG_U16(skb->data, 12); // Info field
604 if (info == 0) {
605 down(&cdev->ncci_list_sem);
606 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
607 up(&cdev->ncci_list_sem);
608 }
609 }
610 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) {
611 down(&cdev->ncci_list_sem);
612 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
613 up(&cdev->ncci_list_sem);
614 }
053b47ff 615 spin_lock_irqsave(&workaround_lock, flags);
1da177e4
LT		 616 if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) {
617 skb_queue_tail(&cdev->recvqueue, skb);
618 wake_up_interruptible(&cdev->recvwait);
053b47ff 619 spin_unlock_irqrestore(&workaround_lock, flags);
1da177e4
LT		 620 return;
621 }
622 ncci = CAPIMSG_CONTROL(skb->data);
623 for (np = cdev->nccis; np && np->ncci != ncci; np = np->next)
624 ;
625 if (!np) {
626 printk(KERN_ERR "BUG: capi_signal: ncci not found\n");
627 skb_queue_tail(&cdev->recvqueue, skb);
628 wake_up_interruptible(&cdev->recvwait);
053b47ff 629 spin_unlock_irqrestore(&workaround_lock, flags);
1da177e4
LT		 630 return;
631 }
632#ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
633 skb_queue_tail(&cdev->recvqueue, skb);
634 wake_up_interruptible(&cdev->recvwait);
635#else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
636 mp = np->minorp;
637 if (!mp) {
638 skb_queue_tail(&cdev->recvqueue, skb);
639 wake_up_interruptible(&cdev->recvwait);
053b47ff 640 spin_unlock_irqrestore(&workaround_lock, flags);
1da177e4
LT		 641 return;
642 }
643
644
645 if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) {
646
647 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2);
648#ifdef _DEBUG_DATAFLOW
649 printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n",
650 datahandle, skb->len-CAPIMSG_LEN(skb->data));
651#endif
652 skb_queue_tail(&mp->inqueue, skb);
653 mp->inbytes += skb->len;
654 handle_minor_recv(mp);
655
656 } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) {
657
658 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4);
659#ifdef _DEBUG_DATAFLOW
660 printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n",
661 datahandle,
662 CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2));
663#endif
664 kfree_skb(skb);
665 (void)capiminor_del_ack(mp, datahandle);
666 if (mp->tty)
667 tty_wakeup(mp->tty);
668 (void)handle_minor_send(mp);
669
670 } else {
671 /* ups, let capi application handle it :-) */
672 skb_queue_tail(&cdev->recvqueue, skb);
673 wake_up_interruptible(&cdev->recvwait);
674 }
675#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
053b47ff 676 spin_unlock_irqrestore(&workaround_lock, flags);
1da177e4
LT		 677}
678
679/* -------- file_operations for capidev ----------------------------- */
680
681static ssize_t
682capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
683{
684 struct capidev *cdev = (struct capidev *)file->private_data;
685 struct sk_buff *skb;
686 size_t copied;
687
688 if (!cdev->ap.applid)
689 return -ENODEV;
690
691 if ((skb = skb_dequeue(&cdev->recvqueue)) == 0) {
692
693 if (file->f_flags & O_NONBLOCK)
694 return -EAGAIN;
695
696 for (;;) {
697 interruptible_sleep_on(&cdev->recvwait);
698 if ((skb = skb_dequeue(&cdev->recvqueue)) != 0)
699 break;
700 if (signal_pending(current))
701 break;
702 }
703 if (skb == 0)
704 return -ERESTARTNOHAND;
705 }
706 if (skb->len > count) {
707 skb_queue_head(&cdev->recvqueue, skb);
708 return -EMSGSIZE;
709 }
710 if (copy_to_user(buf, skb->data, skb->len)) {
711 skb_queue_head(&cdev->recvqueue, skb);
712 return -EFAULT;
713 }
714 copied = skb->len;
715
716 kfree_skb(skb);
717
718 return copied;
719}
720
721static ssize_t
722capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
723{
724 struct capidev *cdev = (struct capidev *)file->private_data;
725 struct sk_buff *skb;
726 u16 mlen;
727
728 if (!cdev->ap.applid)
729 return -ENODEV;
730
731 skb = alloc_skb(count, GFP_USER);
732 if (!skb)
733 return -ENOMEM;
734
735 if (copy_from_user(skb_put(skb, count), buf, count)) {
736 kfree_skb(skb);
737 return -EFAULT;
738 }
739 mlen = CAPIMSG_LEN(skb->data);
740 if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
741 if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) {
742 kfree_skb(skb);
743 return -EINVAL;
744 }
745 } else {
746 if (mlen != count) {
747 kfree_skb(skb);
748 return -EINVAL;
749 }
750 }
751 CAPIMSG_SETAPPID(skb->data, cdev->ap.applid);
752
753 if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) {
754 down(&cdev->ncci_list_sem);
755 capincci_free(cdev, CAPIMSG_NCCI(skb->data));
756 up(&cdev->ncci_list_sem);
757 }
758
759 cdev->errcode = capi20_put_message(&cdev->ap, skb);
760
761 if (cdev->errcode) {
762 kfree_skb(skb);
763 return -EIO;
764 }
765 return count;
766}
767
768static unsigned int
769capi_poll(struct file *file, poll_table * wait)
770{
771 struct capidev *cdev = (struct capidev *)file->private_data;
772 unsigned int mask = 0;
773
774 if (!cdev->ap.applid)
775 return POLLERR;
776
777 poll_wait(file, &(cdev->recvwait), wait);
778 mask = POLLOUT | POLLWRNORM;
779 if (!skb_queue_empty(&cdev->recvqueue))
780 mask |= POLLIN | POLLRDNORM;
781 return mask;
782}
783
784static int
785capi_ioctl(struct inode *inode, struct file *file,
786 unsigned int cmd, unsigned long arg)
787{
788 struct capidev *cdev = file->private_data;
789 struct capi20_appl *ap = &cdev->ap;
790 capi_ioctl_struct data;
791 int retval = -EINVAL;
792 void __user *argp = (void __user *)arg;
793
794 switch (cmd) {
795 case CAPI_REGISTER:
796 {
797 if (ap->applid)
798 return -EEXIST;
799
800 if (copy_from_user(&cdev->ap.rparam, argp,
801 sizeof(struct capi_register_params)))
802 return -EFAULT;
803
804 cdev->ap.private = cdev;
805 cdev->ap.recv_message = capi_recv_message;
806 cdev->errcode = capi20_register(ap);
807 if (cdev->errcode) {
808 ap->applid = 0;
809 return -EIO;
810 }
811 }
812 return (int)ap->applid;
813
814 case CAPI_GET_VERSION:
815 {
816 if (copy_from_user(&data.contr, argp,
817 sizeof(data.contr)))
818 return -EFAULT;
819 cdev->errcode = capi20_get_version(data.contr, &data.version);
820 if (cdev->errcode)
821 return -EIO;
822 if (copy_to_user(argp, &data.version,
823 sizeof(data.version)))
824 return -EFAULT;
825 }
826 return 0;
827
828 case CAPI_GET_SERIAL:
829 {
830 if (copy_from_user(&data.contr, argp,
831 sizeof(data.contr)))
832 return -EFAULT;
833 cdev->errcode = capi20_get_serial (data.contr, data.serial);
834 if (cdev->errcode)
835 return -EIO;
836 if (copy_to_user(argp, data.serial,
837 sizeof(data.serial)))
838 return -EFAULT;
839 }
840 return 0;
841 case CAPI_GET_PROFILE:
842 {
843 if (copy_from_user(&data.contr, argp,
844 sizeof(data.contr)))
845 return -EFAULT;
846
847 if (data.contr == 0) {
848 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
849 if (cdev->errcode)
850 return -EIO;
851
852 retval = copy_to_user(argp,
853 &data.profile.ncontroller,
854 sizeof(data.profile.ncontroller));
855
856 } else {
857 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
858 if (cdev->errcode)
859 return -EIO;
860
861 retval = copy_to_user(argp, &data.profile,
862 sizeof(data.profile));
863 }
864 if (retval)
865 return -EFAULT;
866 }
867 return 0;
868
869 case CAPI_GET_MANUFACTURER:
870 {
871 if (copy_from_user(&data.contr, argp,
872 sizeof(data.contr)))
873 return -EFAULT;
874 cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer);
875 if (cdev->errcode)
876 return -EIO;
877
878 if (copy_to_user(argp, data.manufacturer,
879 sizeof(data.manufacturer)))
880 return -EFAULT;
881
882 }
883 return 0;
884 case CAPI_GET_ERRCODE:
885 data.errcode = cdev->errcode;
886 cdev->errcode = CAPI_NOERROR;
887 if (arg) {
888 if (copy_to_user(argp, &data.errcode,
889 sizeof(data.errcode)))
890 return -EFAULT;
891 }
892 return data.errcode;
893
894 case CAPI_INSTALLED:
895 if (capi20_isinstalled() == CAPI_NOERROR)
896 return 0;
897 return -ENXIO;
898
899 case CAPI_MANUFACTURER_CMD:
900 {
901 struct capi_manufacturer_cmd mcmd;
902 if (!capable(CAP_SYS_ADMIN))
903 return -EPERM;
904 if (copy_from_user(&mcmd, argp, sizeof(mcmd)))
905 return -EFAULT;
906 return capi20_manufacturer(mcmd.cmd, mcmd.data);
907 }
908 return 0;
909
910 case CAPI_SET_FLAGS:
911 case CAPI_CLR_FLAGS:
912 {
913 unsigned userflags;
914 if (copy_from_user(&userflags, argp,
915 sizeof(userflags)))
916 return -EFAULT;
917 if (cmd == CAPI_SET_FLAGS)
918 cdev->userflags |= userflags;
919 else
920 cdev->userflags &= ~userflags;
921 }
922 return 0;
923
924 case CAPI_GET_FLAGS:
925 if (copy_to_user(argp, &cdev->userflags,
926 sizeof(cdev->userflags)))
927 return -EFAULT;
928 return 0;
929
930 case CAPI_NCCI_OPENCOUNT:
931 {
932 struct capincci *nccip;
933#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
934 struct capiminor *mp;
935#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
936 unsigned ncci;
937 int count = 0;
938 if (copy_from_user(&ncci, argp, sizeof(ncci)))
939 return -EFAULT;
940
941 down(&cdev->ncci_list_sem);
942 if ((nccip = capincci_find(cdev, (u32) ncci)) == 0) {
943 up(&cdev->ncci_list_sem);
944 return 0;
945 }
946#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
947 if ((mp = nccip->minorp) != 0) {
948 count += atomic_read(&mp->ttyopencount);
949 }
950#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
951 up(&cdev->ncci_list_sem);
952 return count;
953 }
954 return 0;
955
956#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
957 case CAPI_NCCI_GETUNIT:
958 {
959 struct capincci *nccip;
960 struct capiminor *mp;
961 unsigned ncci;
962 int unit = 0;
963 if (copy_from_user(&ncci, argp,
964 sizeof(ncci)))
965 return -EFAULT;
966 down(&cdev->ncci_list_sem);
967 nccip = capincci_find(cdev, (u32) ncci);
968 if (!nccip || (mp = nccip->minorp) == 0) {
969 up(&cdev->ncci_list_sem);
970 return -ESRCH;
971 }
972 unit = mp->minor;
973 up(&cdev->ncci_list_sem);
974 return unit;
975 }
976 return 0;
977#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
978 }
979 return -EINVAL;
980}
981
982static int
983capi_open(struct inode *inode, struct file *file)
984{
985 if (file->private_data)
986 return -EEXIST;
987
988 if ((file->private_data = capidev_alloc()) == 0)
989 return -ENOMEM;
990
991 return nonseekable_open(inode, file);
992}
993
994static int
995capi_release(struct inode *inode, struct file *file)
996{
997 struct capidev *cdev = (struct capidev *)file->private_data;
998
999 capidev_free(cdev);
1000 file->private_data = NULL;
1001
1002 return 0;
1003}
1004
2b8693c0 1005static const struct file_operations capi_fops =
1da177e4
LT		 1006{
1007 .owner = THIS_MODULE,
1008 .llseek = no_llseek,
1009 .read = capi_read,
1010 .write = capi_write,
1011 .poll = capi_poll,
1012 .ioctl = capi_ioctl,
1013 .open = capi_open,
1014 .release = capi_release,
1015};
1016
1017#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1018/* -------- tty_operations for capincci ----------------------------- */
1019
1020static int capinc_tty_open(struct tty_struct * tty, struct file * file)
1021{
1022 struct capiminor *mp;
053b47ff 1023 unsigned long flags;
1da177e4 1024
4482dfad 1025 if ((mp = capiminor_find(iminor(file->f_path.dentry->d_inode))) == 0)
1da177e4
LT		 1026 return -ENXIO;
1027 if (mp->nccip == 0)
1028 return -ENXIO;
1029
1030 tty->driver_data = (void *)mp;
1031
053b47ff 1032 spin_lock_irqsave(&workaround_lock, flags);
1da177e4
LT		 1033 if (atomic_read(&mp->ttyopencount) == 0)
1034 mp->tty = tty;
1035 atomic_inc(&mp->ttyopencount);
1036#ifdef _DEBUG_REFCOUNT
1037 printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount));
1038#endif
1039 handle_minor_recv(mp);
053b47ff 1040 spin_unlock_irqrestore(&workaround_lock, flags);
1da177e4
LT		 1041 return 0;
1042}
1043
1044static void capinc_tty_close(struct tty_struct * tty, struct file * file)
1045{
1046 struct capiminor *mp;
1047
1048 mp = (struct capiminor *)tty->driver_data;
1049 if (mp) {
1050 if (atomic_dec_and_test(&mp->ttyopencount)) {
1051#ifdef _DEBUG_REFCOUNT
1052 printk(KERN_DEBUG "capinc_tty_close lastclose\n");
1053#endif
1054 tty->driver_data = NULL;
1055 mp->tty = NULL;
1056 }
1057#ifdef _DEBUG_REFCOUNT
1058 printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount));
1059#endif
1060 if (mp->nccip == 0)
1061 capiminor_free(mp);
1062 }
1063
1064#ifdef _DEBUG_REFCOUNT
1065 printk(KERN_DEBUG "capinc_tty_close\n");
1066#endif
1067}
1068
1069static int capinc_tty_write(struct tty_struct * tty,
1070 const unsigned char *buf, int count)
1071{
1072 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1073 struct sk_buff *skb;
053b47ff 1074 unsigned long flags;
1da177e4
LT		 1075
1076#ifdef _DEBUG_TTYFUNCS
1077 printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count);
1078#endif
1079
1080 if (!mp || !mp->nccip) {
1081#ifdef _DEBUG_TTYFUNCS
1082 printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n");
1083#endif
1084 return 0;
1085 }
1086
053b47ff 1087 spin_lock_irqsave(&workaround_lock, flags);
1da177e4
LT		 1088 skb = mp->ttyskb;
1089 if (skb) {
1090 mp->ttyskb = NULL;
1091 skb_queue_tail(&mp->outqueue, skb);
1092 mp->outbytes += skb->len;
1093 }
1094
1095 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC);
1096 if (!skb) {
1097 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
053b47ff 1098 spin_unlock_irqrestore(&workaround_lock, flags);
1da177e4
LT		 1099 return -ENOMEM;
1100 }
1101
1102 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1103 memcpy(skb_put(skb, count), buf, count);
1104
1105 skb_queue_tail(&mp->outqueue, skb);
1106 mp->outbytes += skb->len;
1107 (void)handle_minor_send(mp);
1108 (void)handle_minor_recv(mp);
053b47ff 1109 spin_unlock_irqrestore(&workaround_lock, flags);
1da177e4
LT		 1110 return count;
1111}
1112
1113static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
1114{
1115 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1116 struct sk_buff *skb;
053b47ff 1117 unsigned long flags;
1da177e4
LT		 1118
1119#ifdef _DEBUG_TTYFUNCS
1120 printk(KERN_DEBUG "capinc_put_char(%u)\n", ch);
1121#endif
1122
1123 if (!mp || !mp->nccip) {
1124#ifdef _DEBUG_TTYFUNCS
1125 printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n");
1126#endif
1127 return;
1128 }
1129
053b47ff 1130 spin_lock_irqsave(&workaround_lock, flags);
1da177e4
LT		 1131 skb = mp->ttyskb;
1132 if (skb) {
1133 if (skb_tailroom(skb) > 0) {
1134 *(skb_put(skb, 1)) = ch;
053b47ff 1135 spin_unlock_irqrestore(&workaround_lock, flags);
1da177e4
LT		 1136 return;
1137 }
1138 mp->ttyskb = NULL;
1139 skb_queue_tail(&mp->outqueue, skb);
1140 mp->outbytes += skb->len;
1141 (void)handle_minor_send(mp);
1142 }
1143 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC);
1144 if (skb) {
1145 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1146 *(skb_put(skb, 1)) = ch;
1147 mp->ttyskb = skb;
1148 } else {
1149 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
1150 }
053b47ff 1151 spin_unlock_irqrestore(&workaround_lock, flags);
1da177e4
LT		 1152}
1153
1154static void capinc_tty_flush_chars(struct tty_struct *tty)
1155{
1156 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1157 struct sk_buff *skb;
053b47ff 1158 unsigned long flags;
1da177e4
LT		 1159
1160#ifdef _DEBUG_TTYFUNCS
1161 printk(KERN_DEBUG "capinc_tty_flush_chars\n");
1162#endif
1163
1164 if (!mp || !mp->nccip) {
1165#ifdef _DEBUG_TTYFUNCS
1166 printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n");
1167#endif
1168 return;
1169 }
1170
053b47ff 1171 spin_lock_irqsave(&workaround_lock, flags);
1da177e4
LT		 1172 skb = mp->ttyskb;
1173 if (skb) {
1174 mp->ttyskb = NULL;
1175 skb_queue_tail(&mp->outqueue, skb);
1176 mp->outbytes += skb->len;
1177 (void)handle_minor_send(mp);
1178 }
1179 (void)handle_minor_recv(mp);
053b47ff 1180 spin_unlock_irqrestore(&workaround_lock, flags);
1da177e4
LT		 1181}
1182
1183static int capinc_tty_write_room(struct tty_struct *tty)
1184{
1185 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1186 int room;
1187 if (!mp || !mp->nccip) {
1188#ifdef _DEBUG_TTYFUNCS
1189 printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n");
1190#endif
1191 return 0;
1192 }
1193 room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
1194 room *= CAPI_MAX_BLKSIZE;
1195#ifdef _DEBUG_TTYFUNCS
1196 printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room);
1197#endif
1198 return room;
1199}
1200
408b664a 1201static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
1da177e4
LT		 1202{
1203 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1204 if (!mp || !mp->nccip) {
1205#ifdef _DEBUG_TTYFUNCS
1206 printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n");
1207#endif
1208 return 0;
1209 }
1210#ifdef _DEBUG_TTYFUNCS
1211 printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
1212 mp->outbytes, mp->nack,
1213 skb_queue_len(&mp->outqueue),
1214 skb_queue_len(&mp->inqueue));
1215#endif
1216 return mp->outbytes;
1217}
1218
1219static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file,
1220 unsigned int cmd, unsigned long arg)
1221{
1222 int error = 0;
1223 switch (cmd) {
1224 default:
1225 error = n_tty_ioctl (tty, file, cmd, arg);
1226 break;
1227 }
1228 return error;
1229}
1230
606d099c 1231static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios * old)
1da177e4
LT		 1232{
1233#ifdef _DEBUG_TTYFUNCS
1234 printk(KERN_DEBUG "capinc_tty_set_termios\n");
1235#endif
1236}
1237
1238static void capinc_tty_throttle(struct tty_struct * tty)
1239{
1240 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1241#ifdef _DEBUG_TTYFUNCS
1242 printk(KERN_DEBUG "capinc_tty_throttle\n");
1243#endif
1244 if (mp)
1245 mp->ttyinstop = 1;
1246}
1247
1248static void capinc_tty_unthrottle(struct tty_struct * tty)
1249{
1250 struct capiminor *mp = (struct capiminor *)tty->driver_data;
053b47ff 1251 unsigned long flags;
1da177e4
LT		 1252#ifdef _DEBUG_TTYFUNCS
1253 printk(KERN_DEBUG "capinc_tty_unthrottle\n");
1254#endif
1255 if (mp) {
053b47ff 1256 spin_lock_irqsave(&workaround_lock, flags);
1da177e4
LT		 1257 mp->ttyinstop = 0;
1258 handle_minor_recv(mp);
053b47ff 1259 spin_unlock_irqrestore(&workaround_lock, flags);
1da177e4
LT		 1260 }
1261}
1262
1263static void capinc_tty_stop(struct tty_struct *tty)
1264{
1265 struct capiminor *mp = (struct capiminor *)tty->driver_data;
1266#ifdef _DEBUG_TTYFUNCS
1267 printk(KERN_DEBUG "capinc_tty_stop\n");
1268#endif
1269 if (mp) {
1270 mp->ttyoutstop = 1;
1271 }
1272}
1273
1274static void capinc_tty_start(struct tty_struct *tty)
1275{
1276 struct capiminor *mp = (struct capiminor *)tty->driver_data;
053b47ff 1277 unsigned long flags;
1da177e4
LT		 1278#ifdef _DEBUG_TTYFUNCS
1279 printk(KERN_DEBUG "capinc_tty_start\n");
1280#endif
1281 if (mp) {
053b47ff 1282 spin_lock_irqsave(&workaround_lock, flags);
1da177e4
LT		 1283 mp->ttyoutstop = 0;
1284 (void)handle_minor_send(mp);
053b47ff 1285 spin_unlock_irqrestore(&workaround_lock, flags);
1da177e4
LT		 1286 }
1287}
1288
1289static void capinc_tty_hangup(struct tty_struct *tty)
1290{
1291#ifdef _DEBUG_TTYFUNCS
1292 printk(KERN_DEBUG "capinc_tty_hangup\n");
1293#endif
1294}
1295
1296static void capinc_tty_break_ctl(struct tty_struct *tty, int state)
1297{
1298#ifdef _DEBUG_TTYFUNCS
1299 printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state);
1300#endif
1301}
1302
1303static void capinc_tty_flush_buffer(struct tty_struct *tty)
1304{
1305#ifdef _DEBUG_TTYFUNCS
1306 printk(KERN_DEBUG "capinc_tty_flush_buffer\n");
1307#endif
1308}
1309
1310static void capinc_tty_set_ldisc(struct tty_struct *tty)
1311{
1312#ifdef _DEBUG_TTYFUNCS
1313 printk(KERN_DEBUG "capinc_tty_set_ldisc\n");
1314#endif
1315}
1316
1317static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
1318{
1319#ifdef _DEBUG_TTYFUNCS
1320 printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch);
1321#endif
1322}
1323
1324static int capinc_tty_read_proc(char *page, char **start, off_t off,
1325 int count, int *eof, void *data)
1326{
1327 return 0;
1328}
1329
1330static struct tty_driver *capinc_tty_driver;
1331
b68e31d0 1332static const struct tty_operations capinc_ops = {
1da177e4
LT		 1333 .open = capinc_tty_open,
1334 .close = capinc_tty_close,
1335 .write = capinc_tty_write,
1336 .put_char = capinc_tty_put_char,
1337 .flush_chars = capinc_tty_flush_chars,
1338 .write_room = capinc_tty_write_room,
1339 .chars_in_buffer = capinc_tty_chars_in_buffer,
1340 .ioctl = capinc_tty_ioctl,
1341 .set_termios = capinc_tty_set_termios,
1342 .throttle = capinc_tty_throttle,
1343 .unthrottle = capinc_tty_unthrottle,
1344 .stop = capinc_tty_stop,
1345 .start = capinc_tty_start,
1346 .hangup = capinc_tty_hangup,
1347 .break_ctl = capinc_tty_break_ctl,
1348 .flush_buffer = capinc_tty_flush_buffer,
1349 .set_ldisc = capinc_tty_set_ldisc,
1350 .send_xchar = capinc_tty_send_xchar,
1351 .read_proc = capinc_tty_read_proc,
1352};
1353
1354static int capinc_tty_init(void)
1355{
1356 struct tty_driver *drv;
1357
1358 if (capi_ttyminors > CAPINC_MAX_PORTS)
1359 capi_ttyminors = CAPINC_MAX_PORTS;
1360 if (capi_ttyminors <= 0)
1361 capi_ttyminors = CAPINC_NR_PORTS;
1362
1363 drv = alloc_tty_driver(capi_ttyminors);
1364 if (!drv)
1365 return -ENOMEM;
1366
1367 drv->owner = THIS_MODULE;
1368 drv->driver_name = "capi_nc";
1da177e4
LT		 1369 drv->name = "capi";
1370 drv->major = capi_ttymajor;
1371 drv->minor_start = 0;
1372 drv->type = TTY_DRIVER_TYPE_SERIAL;
1373 drv->subtype = SERIAL_TYPE_NORMAL;
1374 drv->init_termios = tty_std_termios;
1375 drv->init_termios.c_iflag = ICRNL;
1376 drv->init_termios.c_oflag = OPOST | ONLCR;
1377 drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1378 drv->init_termios.c_lflag = 0;
1379 drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS;
1380 tty_set_operations(drv, &capinc_ops);
1381 if (tty_register_driver(drv)) {
1382 put_tty_driver(drv);
1383 printk(KERN_ERR "Couldn't register capi_nc driver\n");
1384 return -1;
1385 }
1386 capinc_tty_driver = drv;
1387 return 0;
1388}
1389
1390static void capinc_tty_exit(void)
1391{
1392 struct tty_driver *drv = capinc_tty_driver;
1393 int retval;
1394 if ((retval = tty_unregister_driver(drv)))
1395 printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval);
1396 put_tty_driver(drv);
1397}
1398
1399#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
1400
1401/* -------- /proc functions ----------------------------------------- */
1402
1403/*
1404 * /proc/capi/capi20:
1405 * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
1406 */
1407static int proc_capidev_read_proc(char *page, char **start, off_t off,
1408 int count, int *eof, void *data)
1409{
1410 struct capidev *cdev;
1411 struct list_head *l;
1412 int len = 0;
1413
1414 read_lock(&capidev_list_lock);
1415 list_for_each(l, &capidev_list) {
1416 cdev = list_entry(l, struct capidev, list);
1417 len += sprintf(page+len, "0 %d %lu %lu %lu %lu\n",
1418 cdev->ap.applid,
1419 cdev->ap.nrecvctlpkt,
1420 cdev->ap.nrecvdatapkt,
1421 cdev->ap.nsentctlpkt,
1422 cdev->ap.nsentdatapkt);
1423 if (len <= off) {
1424 off -= len;
1425 len = 0;
1426 } else {
1427 if (len-off > count)
1428 goto endloop;
1429 }
1430 }
1431
1432endloop:
1433 read_unlock(&capidev_list_lock);
1434 if (len < count)
1435 *eof = 1;
1436 if (len > count) len = count;
1437 if (len < 0) len = 0;
1438 return len;
1439}
1440
1441/*
1442 * /proc/capi/capi20ncci:
1443 * applid ncci
1444 */
1445static int proc_capincci_read_proc(char *page, char **start, off_t off,
1446 int count, int *eof, void *data)
1447{
1448 struct capidev *cdev;
1449 struct capincci *np;
1450 struct list_head *l;
1451 int len = 0;
1452
1453 read_lock(&capidev_list_lock);
1454 list_for_each(l, &capidev_list) {
1455 cdev = list_entry(l, struct capidev, list);
1456 for (np=cdev->nccis; np; np = np->next) {
1457 len += sprintf(page+len, "%d 0x%x\n",
1458 cdev->ap.applid,
1459 np->ncci);
1460 if (len <= off) {
1461 off -= len;
1462 len = 0;
1463 } else {
1464 if (len-off > count)
1465 goto endloop;
1466 }
1467 }
1468 }
1469endloop:
1470 read_unlock(&capidev_list_lock);
1471 *start = page+off;
1472 if (len < count)
1473 *eof = 1;
1474 if (len>count) len = count;
1475 if (len<0) len = 0;
1476 return len;
1477}
1478
1479static struct procfsentries {
1480 char *name;
1481 mode_t mode;
1482 int (*read_proc)(char *page, char **start, off_t off,
1483 int count, int *eof, void *data);
1484 struct proc_dir_entry *procent;
1485} procfsentries[] = {
1486 /* { "capi", S_IFDIR, 0 }, */
1487 { "capi/capi20", 0 , proc_capidev_read_proc },
1488 { "capi/capi20ncci", 0 , proc_capincci_read_proc },
1489};
1490
1491static void __init proc_init(void)
1492{
fd863db9 1493 int nelem = ARRAY_SIZE(procfsentries);
1da177e4
LT		 1494 int i;
1495
1496 for (i=0; i < nelem; i++) {
1497 struct procfsentries *p = procfsentries + i;
1498 p->procent = create_proc_entry(p->name, p->mode, NULL);
1499 if (p->procent) p->procent->read_proc = p->read_proc;
1500 }
1501}
1502
1503static void __exit proc_exit(void)
1504{
fd863db9 1505 int nelem = ARRAY_SIZE(procfsentries);
1da177e4
LT		 1506 int i;
1507
1508 for (i=nelem-1; i >= 0; i--) {
1509 struct procfsentries *p = procfsentries + i;
1510 if (p->procent) {
1511 remove_proc_entry(p->name, NULL);
1512 p->procent = NULL;
1513 }
1514 }
1515}
1516
1517/* -------- init function and module interface ---------------------- */
1518
1519
1520static char rev[32];
1521
1522static int __init capi_init(void)
1523{
1524 char *p;
1525 char *compileinfo;
6d9eac34 1526 int major_ret;
1da177e4
LT		 1527
1528 if ((p = strchr(revision, ':')) != 0 && p[1]) {
1529 strlcpy(rev, p + 2, sizeof(rev));
1530 if ((p = strchr(rev, '$')) != 0 && p > rev)
1531 *(p-1) = 0;
1532 } else
1533 strcpy(rev, "1.0");
1534
6d9eac34
AM		 1535 major_ret = register_chrdev(capi_major, "capi20", &capi_fops);
1536 if (major_ret < 0) {
1da177e4 1537 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
6d9eac34 1538 return major_ret;
1da177e4 1539 }
56b22935 1540 capi_class = class_create(THIS_MODULE, "capi");
1da177e4
LT		 1541 if (IS_ERR(capi_class)) {
1542 unregister_chrdev(capi_major, "capi20");
1543 return PTR_ERR(capi_class);
1544 }
1545
53f46542 1546 class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
1da177e4
LT		 1547
1548#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1549 if (capinc_tty_init() < 0) {
56b22935 1550 class_device_destroy(capi_class, MKDEV(capi_major, 0));
1551 class_destroy(capi_class);
1da177e4
LT		 1552 unregister_chrdev(capi_major, "capi20");
1553 return -ENOMEM;
1554 }
1555#endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
1556
1557 proc_init();
1558
1559#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1560#if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
1561 compileinfo = " (middleware+capifs)";
1562#else
1563 compileinfo = " (no capifs)";
1564#endif
1565#else
1566 compileinfo = " (no middleware)";
1567#endif
1568 printk(KERN_NOTICE "capi20: Rev %s: started up with major %d%s\n",
1569 rev, capi_major, compileinfo);
1570
1571 return 0;
1572}
1573
1574static void __exit capi_exit(void)
1575{
1576 proc_exit();
1577
56b22935 1578 class_device_destroy(capi_class, MKDEV(capi_major, 0));
1579 class_destroy(capi_class);
1da177e4 1580 unregister_chrdev(capi_major, "capi20");
1da177e4
LT		 1581
1582#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1583 capinc_tty_exit();
1584#endif
1585 printk(KERN_NOTICE "capi: Rev %s: unloaded\n", rev);
1586}
1587
1588module_init(capi_init);
1589module_exit(capi_exit);
Motorola kernel-slsi