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