[PATCH] const struct tty_operations
[linux-3.10.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/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>
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
47 static char *revision = "$Revision: 1.1.2.7 $";
48
49 MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
50 MODULE_AUTHOR("Carsten Paeth");
51 MODULE_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
59 static struct class *capi_class;
60
61 static int capi_major = 68;             /* allocated */
62 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
63 #define CAPINC_NR_PORTS 32
64 #define CAPINC_MAX_PORTS        256
65 static int capi_ttymajor = 191;
66 static int capi_ttyminors = CAPINC_NR_PORTS;
67 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
68
69 module_param_named(major, capi_major, uint, 0);
70 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
71 module_param_named(ttymajor, capi_ttymajor, uint, 0);
72 module_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
83 struct capidev;
84 struct capincci;
85 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
86 struct capiminor;
87
88 struct datahandle_queue {
89         struct list_head        list;
90         u16                     datahandle;
91 };
92
93 struct 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 */
115         struct list_head ackqueue;
116         int nack;
117         spinlock_t ackqlock;
118 };
119 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
120
121 struct capincci {
122         struct capincci *next;
123         u32              ncci;
124         struct capidev  *cdev;
125 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
126         struct capiminor *minorp;
127 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
128 };
129
130 struct capidev {
131         struct list_head list;
132         struct capi20_appl ap;
133         u16             errcode;
134         unsigned        userflags;
135
136         struct sk_buff_head recvqueue;
137         wait_queue_head_t recvwait;
138
139         struct capincci *nccis;
140
141         struct semaphore ncci_list_sem;
142 };
143
144 /* -------- global variables ---------------------------------------- */
145
146 static DEFINE_RWLOCK(capidev_list_lock);
147 static LIST_HEAD(capidev_list);
148
149 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
150 static DEFINE_RWLOCK(capiminor_list_lock);
151 static LIST_HEAD(capiminor_list);
152 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
153
154 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
155 /* -------- datahandles --------------------------------------------- */
156
157 static int capincci_add_ack(struct capiminor *mp, u16 datahandle)
158 {
159         struct datahandle_queue *n;
160         unsigned long flags;
161
162         n = kmalloc(sizeof(*n), GFP_ATOMIC);
163         if (unlikely(!n)) {
164                 printk(KERN_ERR "capi: alloc datahandle failed\n");
165                 return -1;
166         }
167         n->datahandle = datahandle;
168         INIT_LIST_HEAD(&n->list);
169         spin_lock_irqsave(&mp->ackqlock, flags);
170         list_add_tail(&n->list, &mp->ackqueue);
171         mp->nack++;
172         spin_unlock_irqrestore(&mp->ackqlock, flags);
173         return 0;
174 }
175
176 static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
177 {
178         struct datahandle_queue *p, *tmp;
179         unsigned long flags;
180
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);
185                         kfree(p);
186                         mp->nack--;
187                         spin_unlock_irqrestore(&mp->ackqlock, flags);
188                         return 0;
189                 }
190         }
191         spin_unlock_irqrestore(&mp->ackqlock, flags);
192         return -1;
193 }
194
195 static void capiminor_del_all_ack(struct capiminor *mp)
196 {
197         struct datahandle_queue *p, *tmp;
198         unsigned long flags;
199
200         spin_lock_irqsave(&mp->ackqlock, flags);
201         list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) {
202                 list_del(&p->list);
203                 kfree(p);
204                 mp->nack--;
205         }
206         spin_unlock_irqrestore(&mp->ackqlock, flags);
207 }
208
209
210 /* -------- struct capiminor ---------------------------------------- */
211
212 static 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);
229         INIT_LIST_HEAD(&mp->ackqueue);
230         spin_lock_init(&mp->ackqlock);
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
263 static 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
279 static struct capiminor *capiminor_find(unsigned int minor)
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
300 static 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
333 static 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
369 static 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
382 static 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
401 static 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
424 static struct sk_buff *
425 gen_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
443 static 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         }
474         if (mp->tty->receive_room < datalen) {
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;
501 bad:
502         tty_ldisc_deref(ld);
503         return -1;
504 }
505
506 static 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
520 static 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
586 static 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
670 static ssize_t
671 capi_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
710 static ssize_t
711 capi_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
757 static unsigned int
758 capi_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
773 static int
774 capi_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
971 static int
972 capi_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
983 static int
984 capi_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
994 static 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
1009 static int capinc_tty_open(struct tty_struct * tty, struct file * file)
1010 {
1011         struct capiminor *mp;
1012
1013         if ((mp = capiminor_find(iminor(file->f_dentry->d_inode))) == 0)
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
1030 static 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
1055 static 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
1095 static 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
1132 static 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
1158 static 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
1176 static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
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
1194 static 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
1206 static 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
1213 static 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
1223 static 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
1235 static 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
1246 static 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
1258 static 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
1265 static 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
1272 static 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
1279 static 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
1286 static 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
1293 static 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
1299 static struct tty_driver *capinc_tty_driver;
1300
1301 static const struct tty_operations capinc_ops = {
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
1323 static 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";
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
1359 static 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  */
1376 static 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
1401 endloop:
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  */
1414 static 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         }
1438 endloop:
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
1448 static 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
1460 static 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
1472 static 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
1489 static char rev[32];
1490
1491 static int __init capi_init(void)
1492 {
1493         char *p;
1494         char *compileinfo;
1495         int major_ret;
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
1504         major_ret = register_chrdev(capi_major, "capi20", &capi_fops);
1505         if (major_ret < 0) {
1506                 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
1507                 return major_ret;
1508         }
1509         capi_class = class_create(THIS_MODULE, "capi");
1510         if (IS_ERR(capi_class)) {
1511                 unregister_chrdev(capi_major, "capi20");
1512                 return PTR_ERR(capi_class);
1513         }
1514
1515         class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
1516
1517 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1518         if (capinc_tty_init() < 0) {
1519                 class_device_destroy(capi_class, MKDEV(capi_major, 0));
1520                 class_destroy(capi_class);
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
1543 static void __exit capi_exit(void)
1544 {
1545         proc_exit();
1546
1547         class_device_destroy(capi_class, MKDEV(capi_major, 0));
1548         class_destroy(capi_class);
1549         unregister_chrdev(capi_major, "capi20");
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
1557 module_init(capi_init);
1558 module_exit(capi_exit);