Merge master.kernel.org:/home/rmk/linux-2.6-serial
[linux-2.6] / 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 *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 (mp->tty->receive_room < datalen) {
467 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
468                 printk(KERN_DEBUG "capi: no room in tty\n");
469 #endif
470                 goto bad;
471         }
472         if ((nskb = gen_data_b3_resp_for(mp, skb)) == 0) {
473                 printk(KERN_ERR "capi: gen_data_b3_resp failed\n");
474                 goto bad;
475         }
476         datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4);
477         errcode = capi20_put_message(mp->ap, nskb);
478         if (errcode != CAPI_NOERROR) {
479                 printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n",
480                                 errcode);
481                 kfree_skb(nskb);
482                 goto bad;
483         }
484         (void)skb_pull(skb, CAPIMSG_LEN(skb->data));
485 #ifdef _DEBUG_DATAFLOW
486         printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n",
487                                 datahandle, skb->len);
488 #endif
489         ld->receive_buf(mp->tty, skb->data, NULL, skb->len);
490         kfree_skb(skb);
491         tty_ldisc_deref(ld);
492         return 0;
493 bad:
494         tty_ldisc_deref(ld);
495         return -1;
496 }
497
498 static void handle_minor_recv(struct capiminor *mp)
499 {
500         struct sk_buff *skb;
501         while ((skb = skb_dequeue(&mp->inqueue)) != 0) {
502                 unsigned int len = skb->len;
503                 mp->inbytes -= len;
504                 if (handle_recv_skb(mp, skb) < 0) {
505                         skb_queue_head(&mp->inqueue, skb);
506                         mp->inbytes += len;
507                         return;
508                 }
509         }
510 }
511
512 static int handle_minor_send(struct capiminor *mp)
513 {
514         struct sk_buff *skb;
515         u16 len;
516         int count = 0;
517         u16 errcode;
518         u16 datahandle;
519
520         if (mp->tty && mp->ttyoutstop) {
521 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
522                 printk(KERN_DEBUG "capi: send: tty stopped\n");
523 #endif
524                 return 0;
525         }
526
527         while ((skb = skb_dequeue(&mp->outqueue)) != 0) {
528                 datahandle = mp->datahandle;
529                 len = (u16)skb->len;
530                 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
531                 memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
532                 capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN);
533                 capimsg_setu16(skb->data, 2, mp->ap->applid);
534                 capimsg_setu8 (skb->data, 4, CAPI_DATA_B3);
535                 capimsg_setu8 (skb->data, 5, CAPI_REQ);
536                 capimsg_setu16(skb->data, 6, mp->msgid++);
537                 capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */
538                 capimsg_setu32(skb->data, 12, (u32) skb->data); /* Data32 */
539                 capimsg_setu16(skb->data, 16, len);     /* Data length */
540                 capimsg_setu16(skb->data, 18, datahandle);
541                 capimsg_setu16(skb->data, 20, 0);       /* Flags */
542
543                 if (capincci_add_ack(mp, datahandle) < 0) {
544                         skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
545                         skb_queue_head(&mp->outqueue, skb);
546                         return count;
547                 }
548                 errcode = capi20_put_message(mp->ap, skb);
549                 if (errcode == CAPI_NOERROR) {
550                         mp->datahandle++;
551                         count++;
552                         mp->outbytes -= len;
553 #ifdef _DEBUG_DATAFLOW
554                         printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n",
555                                                         datahandle, len);
556 #endif
557                         continue;
558                 }
559                 capiminor_del_ack(mp, datahandle);
560
561                 if (errcode == CAPI_SENDQUEUEFULL) {
562                         skb_pull(skb, CAPI_DATA_B3_REQ_LEN);
563                         skb_queue_head(&mp->outqueue, skb);
564                         break;
565                 }
566
567                 /* ups, drop packet */
568                 printk(KERN_ERR "capi: put_message = %x\n", errcode);
569                 mp->outbytes -= len;
570                 kfree_skb(skb);
571         }
572         return count;
573 }
574
575 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
576 /* -------- function called by lower level -------------------------- */
577
578 static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
579 {
580         struct capidev *cdev = ap->private;
581 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
582         struct capiminor *mp;
583         u16 datahandle;
584 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
585         struct capincci *np;
586         u32 ncci;
587
588         if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) {
589                 u16 info = CAPIMSG_U16(skb->data, 12); // Info field
590                 if (info == 0) {
591                         down(&cdev->ncci_list_sem);
592                         capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
593                         up(&cdev->ncci_list_sem);
594                 }
595         }
596         if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) {
597                 down(&cdev->ncci_list_sem);
598                 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data));
599                 up(&cdev->ncci_list_sem);
600         }
601         if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) {
602                 skb_queue_tail(&cdev->recvqueue, skb);
603                 wake_up_interruptible(&cdev->recvwait);
604                 return;
605         }
606         ncci = CAPIMSG_CONTROL(skb->data);
607         for (np = cdev->nccis; np && np->ncci != ncci; np = np->next)
608                 ;
609         if (!np) {
610                 printk(KERN_ERR "BUG: capi_signal: ncci not found\n");
611                 skb_queue_tail(&cdev->recvqueue, skb);
612                 wake_up_interruptible(&cdev->recvwait);
613                 return;
614         }
615 #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE
616         skb_queue_tail(&cdev->recvqueue, skb);
617         wake_up_interruptible(&cdev->recvwait);
618 #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */
619         mp = np->minorp;
620         if (!mp) {
621                 skb_queue_tail(&cdev->recvqueue, skb);
622                 wake_up_interruptible(&cdev->recvwait);
623                 return;
624         }
625
626
627         if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) {
628                 
629                 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2);
630 #ifdef _DEBUG_DATAFLOW
631                 printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n",
632                                 datahandle, skb->len-CAPIMSG_LEN(skb->data));
633 #endif
634                 skb_queue_tail(&mp->inqueue, skb);
635                 mp->inbytes += skb->len;
636                 handle_minor_recv(mp);
637
638         } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) {
639
640                 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4);
641 #ifdef _DEBUG_DATAFLOW
642                 printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n",
643                                 datahandle,
644                                 CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2));
645 #endif
646                 kfree_skb(skb);
647                 (void)capiminor_del_ack(mp, datahandle);
648                 if (mp->tty)
649                         tty_wakeup(mp->tty);
650                 (void)handle_minor_send(mp);
651
652         } else {
653                 /* ups, let capi application handle it :-) */
654                 skb_queue_tail(&cdev->recvqueue, skb);
655                 wake_up_interruptible(&cdev->recvwait);
656         }
657 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
658 }
659
660 /* -------- file_operations for capidev ----------------------------- */
661
662 static ssize_t
663 capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
664 {
665         struct capidev *cdev = (struct capidev *)file->private_data;
666         struct sk_buff *skb;
667         size_t copied;
668
669         if (!cdev->ap.applid)
670                 return -ENODEV;
671
672         if ((skb = skb_dequeue(&cdev->recvqueue)) == 0) {
673
674                 if (file->f_flags & O_NONBLOCK)
675                         return -EAGAIN;
676
677                 for (;;) {
678                         interruptible_sleep_on(&cdev->recvwait);
679                         if ((skb = skb_dequeue(&cdev->recvqueue)) != 0)
680                                 break;
681                         if (signal_pending(current))
682                                 break;
683                 }
684                 if (skb == 0)
685                         return -ERESTARTNOHAND;
686         }
687         if (skb->len > count) {
688                 skb_queue_head(&cdev->recvqueue, skb);
689                 return -EMSGSIZE;
690         }
691         if (copy_to_user(buf, skb->data, skb->len)) {
692                 skb_queue_head(&cdev->recvqueue, skb);
693                 return -EFAULT;
694         }
695         copied = skb->len;
696
697         kfree_skb(skb);
698
699         return copied;
700 }
701
702 static ssize_t
703 capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
704 {
705         struct capidev *cdev = (struct capidev *)file->private_data;
706         struct sk_buff *skb;
707         u16 mlen;
708
709         if (!cdev->ap.applid)
710                 return -ENODEV;
711
712         skb = alloc_skb(count, GFP_USER);
713         if (!skb)
714                 return -ENOMEM;
715
716         if (copy_from_user(skb_put(skb, count), buf, count)) {
717                 kfree_skb(skb);
718                 return -EFAULT;
719         }
720         mlen = CAPIMSG_LEN(skb->data);
721         if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
722                 if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) {
723                         kfree_skb(skb);
724                         return -EINVAL;
725                 }
726         } else {
727                 if (mlen != count) {
728                         kfree_skb(skb);
729                         return -EINVAL;
730                 }
731         }
732         CAPIMSG_SETAPPID(skb->data, cdev->ap.applid);
733
734         if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) {
735                 down(&cdev->ncci_list_sem);
736                 capincci_free(cdev, CAPIMSG_NCCI(skb->data));
737                 up(&cdev->ncci_list_sem);
738         }
739
740         cdev->errcode = capi20_put_message(&cdev->ap, skb);
741
742         if (cdev->errcode) {
743                 kfree_skb(skb);
744                 return -EIO;
745         }
746         return count;
747 }
748
749 static unsigned int
750 capi_poll(struct file *file, poll_table * wait)
751 {
752         struct capidev *cdev = (struct capidev *)file->private_data;
753         unsigned int mask = 0;
754
755         if (!cdev->ap.applid)
756                 return POLLERR;
757
758         poll_wait(file, &(cdev->recvwait), wait);
759         mask = POLLOUT | POLLWRNORM;
760         if (!skb_queue_empty(&cdev->recvqueue))
761                 mask |= POLLIN | POLLRDNORM;
762         return mask;
763 }
764
765 static int
766 capi_ioctl(struct inode *inode, struct file *file,
767            unsigned int cmd, unsigned long arg)
768 {
769         struct capidev *cdev = file->private_data;
770         struct capi20_appl *ap = &cdev->ap;
771         capi_ioctl_struct data;
772         int retval = -EINVAL;
773         void __user *argp = (void __user *)arg;
774
775         switch (cmd) {
776         case CAPI_REGISTER:
777                 {
778                         if (ap->applid)
779                                 return -EEXIST;
780
781                         if (copy_from_user(&cdev->ap.rparam, argp,
782                                            sizeof(struct capi_register_params)))
783                                 return -EFAULT;
784                         
785                         cdev->ap.private = cdev;
786                         cdev->ap.recv_message = capi_recv_message;
787                         cdev->errcode = capi20_register(ap);
788                         if (cdev->errcode) {
789                                 ap->applid = 0;
790                                 return -EIO;
791                         }
792                 }
793                 return (int)ap->applid;
794
795         case CAPI_GET_VERSION:
796                 {
797                         if (copy_from_user(&data.contr, argp,
798                                                 sizeof(data.contr)))
799                                 return -EFAULT;
800                         cdev->errcode = capi20_get_version(data.contr, &data.version);
801                         if (cdev->errcode)
802                                 return -EIO;
803                         if (copy_to_user(argp, &data.version,
804                                          sizeof(data.version)))
805                                 return -EFAULT;
806                 }
807                 return 0;
808
809         case CAPI_GET_SERIAL:
810                 {
811                         if (copy_from_user(&data.contr, argp,
812                                            sizeof(data.contr)))
813                                 return -EFAULT;
814                         cdev->errcode = capi20_get_serial (data.contr, data.serial);
815                         if (cdev->errcode)
816                                 return -EIO;
817                         if (copy_to_user(argp, data.serial,
818                                          sizeof(data.serial)))
819                                 return -EFAULT;
820                 }
821                 return 0;
822         case CAPI_GET_PROFILE:
823                 {
824                         if (copy_from_user(&data.contr, argp,
825                                            sizeof(data.contr)))
826                                 return -EFAULT;
827
828                         if (data.contr == 0) {
829                                 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
830                                 if (cdev->errcode)
831                                         return -EIO;
832
833                                 retval = copy_to_user(argp,
834                                       &data.profile.ncontroller,
835                                        sizeof(data.profile.ncontroller));
836
837                         } else {
838                                 cdev->errcode = capi20_get_profile(data.contr, &data.profile);
839                                 if (cdev->errcode)
840                                         return -EIO;
841
842                                 retval = copy_to_user(argp, &data.profile,
843                                                    sizeof(data.profile));
844                         }
845                         if (retval)
846                                 return -EFAULT;
847                 }
848                 return 0;
849
850         case CAPI_GET_MANUFACTURER:
851                 {
852                         if (copy_from_user(&data.contr, argp,
853                                            sizeof(data.contr)))
854                                 return -EFAULT;
855                         cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer);
856                         if (cdev->errcode)
857                                 return -EIO;
858
859                         if (copy_to_user(argp, data.manufacturer,
860                                          sizeof(data.manufacturer)))
861                                 return -EFAULT;
862
863                 }
864                 return 0;
865         case CAPI_GET_ERRCODE:
866                 data.errcode = cdev->errcode;
867                 cdev->errcode = CAPI_NOERROR;
868                 if (arg) {
869                         if (copy_to_user(argp, &data.errcode,
870                                          sizeof(data.errcode)))
871                                 return -EFAULT;
872                 }
873                 return data.errcode;
874
875         case CAPI_INSTALLED:
876                 if (capi20_isinstalled() == CAPI_NOERROR)
877                         return 0;
878                 return -ENXIO;
879
880         case CAPI_MANUFACTURER_CMD:
881                 {
882                         struct capi_manufacturer_cmd mcmd;
883                         if (!capable(CAP_SYS_ADMIN))
884                                 return -EPERM;
885                         if (copy_from_user(&mcmd, argp, sizeof(mcmd)))
886                                 return -EFAULT;
887                         return capi20_manufacturer(mcmd.cmd, mcmd.data);
888                 }
889                 return 0;
890
891         case CAPI_SET_FLAGS:
892         case CAPI_CLR_FLAGS:
893                 {
894                         unsigned userflags;
895                         if (copy_from_user(&userflags, argp,
896                                            sizeof(userflags)))
897                                 return -EFAULT;
898                         if (cmd == CAPI_SET_FLAGS)
899                                 cdev->userflags |= userflags;
900                         else
901                                 cdev->userflags &= ~userflags;
902                 }
903                 return 0;
904
905         case CAPI_GET_FLAGS:
906                 if (copy_to_user(argp, &cdev->userflags,
907                                  sizeof(cdev->userflags)))
908                         return -EFAULT;
909                 return 0;
910
911         case CAPI_NCCI_OPENCOUNT:
912                 {
913                         struct capincci *nccip;
914 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
915                         struct capiminor *mp;
916 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
917                         unsigned ncci;
918                         int count = 0;
919                         if (copy_from_user(&ncci, argp, sizeof(ncci)))
920                                 return -EFAULT;
921
922                         down(&cdev->ncci_list_sem);
923                         if ((nccip = capincci_find(cdev, (u32) ncci)) == 0) {
924                                 up(&cdev->ncci_list_sem);
925                                 return 0;
926                         }
927 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
928                         if ((mp = nccip->minorp) != 0) {
929                                 count += atomic_read(&mp->ttyopencount);
930                         }
931 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
932                         up(&cdev->ncci_list_sem);
933                         return count;
934                 }
935                 return 0;
936
937 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
938         case CAPI_NCCI_GETUNIT:
939                 {
940                         struct capincci *nccip;
941                         struct capiminor *mp;
942                         unsigned ncci;
943                         int unit = 0;
944                         if (copy_from_user(&ncci, argp,
945                                            sizeof(ncci)))
946                                 return -EFAULT;
947                         down(&cdev->ncci_list_sem);
948                         nccip = capincci_find(cdev, (u32) ncci);
949                         if (!nccip || (mp = nccip->minorp) == 0) {
950                                 up(&cdev->ncci_list_sem);
951                                 return -ESRCH;
952                         }
953                         unit = mp->minor;
954                         up(&cdev->ncci_list_sem);
955                         return unit;
956                 }
957                 return 0;
958 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
959         }
960         return -EINVAL;
961 }
962
963 static int
964 capi_open(struct inode *inode, struct file *file)
965 {
966         if (file->private_data)
967                 return -EEXIST;
968
969         if ((file->private_data = capidev_alloc()) == 0)
970                 return -ENOMEM;
971
972         return nonseekable_open(inode, file);
973 }
974
975 static int
976 capi_release(struct inode *inode, struct file *file)
977 {
978         struct capidev *cdev = (struct capidev *)file->private_data;
979
980         capidev_free(cdev);
981         file->private_data = NULL;
982         
983         return 0;
984 }
985
986 static struct file_operations capi_fops =
987 {
988         .owner          = THIS_MODULE,
989         .llseek         = no_llseek,
990         .read           = capi_read,
991         .write          = capi_write,
992         .poll           = capi_poll,
993         .ioctl          = capi_ioctl,
994         .open           = capi_open,
995         .release        = capi_release,
996 };
997
998 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
999 /* -------- tty_operations for capincci ----------------------------- */
1000
1001 static int capinc_tty_open(struct tty_struct * tty, struct file * file)
1002 {
1003         struct capiminor *mp;
1004
1005         if ((mp = capiminor_find(iminor(file->f_dentry->d_inode))) == 0)
1006                 return -ENXIO;
1007         if (mp->nccip == 0)
1008                 return -ENXIO;
1009
1010         tty->driver_data = (void *)mp;
1011
1012         if (atomic_read(&mp->ttyopencount) == 0)
1013                 mp->tty = tty;
1014         atomic_inc(&mp->ttyopencount);
1015 #ifdef _DEBUG_REFCOUNT
1016         printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount));
1017 #endif
1018         handle_minor_recv(mp);
1019         return 0;
1020 }
1021
1022 static void capinc_tty_close(struct tty_struct * tty, struct file * file)
1023 {
1024         struct capiminor *mp;
1025
1026         mp = (struct capiminor *)tty->driver_data;
1027         if (mp) {
1028                 if (atomic_dec_and_test(&mp->ttyopencount)) {
1029 #ifdef _DEBUG_REFCOUNT
1030                         printk(KERN_DEBUG "capinc_tty_close lastclose\n");
1031 #endif
1032                         tty->driver_data = NULL;
1033                         mp->tty = NULL;
1034                 }
1035 #ifdef _DEBUG_REFCOUNT
1036                 printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount));
1037 #endif
1038                 if (mp->nccip == 0)
1039                         capiminor_free(mp);
1040         }
1041
1042 #ifdef _DEBUG_REFCOUNT
1043         printk(KERN_DEBUG "capinc_tty_close\n");
1044 #endif
1045 }
1046
1047 static int capinc_tty_write(struct tty_struct * tty,
1048                             const unsigned char *buf, int count)
1049 {
1050         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1051         struct sk_buff *skb;
1052
1053 #ifdef _DEBUG_TTYFUNCS
1054         printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count);
1055 #endif
1056
1057         if (!mp || !mp->nccip) {
1058 #ifdef _DEBUG_TTYFUNCS
1059                 printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n");
1060 #endif
1061                 return 0;
1062         }
1063
1064         skb = mp->ttyskb;
1065         if (skb) {
1066                 mp->ttyskb = NULL;
1067                 skb_queue_tail(&mp->outqueue, skb);
1068                 mp->outbytes += skb->len;
1069         }
1070
1071         skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC);
1072         if (!skb) {
1073                 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
1074                 return -ENOMEM;
1075         }
1076
1077         skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1078         memcpy(skb_put(skb, count), buf, count);
1079
1080         skb_queue_tail(&mp->outqueue, skb);
1081         mp->outbytes += skb->len;
1082         (void)handle_minor_send(mp);
1083         (void)handle_minor_recv(mp);
1084         return count;
1085 }
1086
1087 static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
1088 {
1089         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1090         struct sk_buff *skb;
1091
1092 #ifdef _DEBUG_TTYFUNCS
1093         printk(KERN_DEBUG "capinc_put_char(%u)\n", ch);
1094 #endif
1095
1096         if (!mp || !mp->nccip) {
1097 #ifdef _DEBUG_TTYFUNCS
1098                 printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n");
1099 #endif
1100                 return;
1101         }
1102
1103         skb = mp->ttyskb;
1104         if (skb) {
1105                 if (skb_tailroom(skb) > 0) {
1106                         *(skb_put(skb, 1)) = ch;
1107                         return;
1108                 }
1109                 mp->ttyskb = NULL;
1110                 skb_queue_tail(&mp->outqueue, skb);
1111                 mp->outbytes += skb->len;
1112                 (void)handle_minor_send(mp);
1113         }
1114         skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC);
1115         if (skb) {
1116                 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1117                 *(skb_put(skb, 1)) = ch;
1118                 mp->ttyskb = skb;
1119         } else {
1120                 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
1121         }
1122 }
1123
1124 static void capinc_tty_flush_chars(struct tty_struct *tty)
1125 {
1126         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1127         struct sk_buff *skb;
1128
1129 #ifdef _DEBUG_TTYFUNCS
1130         printk(KERN_DEBUG "capinc_tty_flush_chars\n");
1131 #endif
1132
1133         if (!mp || !mp->nccip) {
1134 #ifdef _DEBUG_TTYFUNCS
1135                 printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n");
1136 #endif
1137                 return;
1138         }
1139
1140         skb = mp->ttyskb;
1141         if (skb) {
1142                 mp->ttyskb = NULL;
1143                 skb_queue_tail(&mp->outqueue, skb);
1144                 mp->outbytes += skb->len;
1145                 (void)handle_minor_send(mp);
1146         }
1147         (void)handle_minor_recv(mp);
1148 }
1149
1150 static int capinc_tty_write_room(struct tty_struct *tty)
1151 {
1152         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1153         int room;
1154         if (!mp || !mp->nccip) {
1155 #ifdef _DEBUG_TTYFUNCS
1156                 printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n");
1157 #endif
1158                 return 0;
1159         }
1160         room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
1161         room *= CAPI_MAX_BLKSIZE;
1162 #ifdef _DEBUG_TTYFUNCS
1163         printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room);
1164 #endif
1165         return room;
1166 }
1167
1168 static int capinc_tty_chars_in_buffer(struct tty_struct *tty)
1169 {
1170         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1171         if (!mp || !mp->nccip) {
1172 #ifdef _DEBUG_TTYFUNCS
1173                 printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n");
1174 #endif
1175                 return 0;
1176         }
1177 #ifdef _DEBUG_TTYFUNCS
1178         printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
1179                         mp->outbytes, mp->nack,
1180                         skb_queue_len(&mp->outqueue),
1181                         skb_queue_len(&mp->inqueue));
1182 #endif
1183         return mp->outbytes;
1184 }
1185
1186 static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file,
1187                     unsigned int cmd, unsigned long arg)
1188 {
1189         int error = 0;
1190         switch (cmd) {
1191         default:
1192                 error = n_tty_ioctl (tty, file, cmd, arg);
1193                 break;
1194         }
1195         return error;
1196 }
1197
1198 static void capinc_tty_set_termios(struct tty_struct *tty, struct termios * old)
1199 {
1200 #ifdef _DEBUG_TTYFUNCS
1201         printk(KERN_DEBUG "capinc_tty_set_termios\n");
1202 #endif
1203 }
1204
1205 static void capinc_tty_throttle(struct tty_struct * tty)
1206 {
1207         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1208 #ifdef _DEBUG_TTYFUNCS
1209         printk(KERN_DEBUG "capinc_tty_throttle\n");
1210 #endif
1211         if (mp)
1212                 mp->ttyinstop = 1;
1213 }
1214
1215 static void capinc_tty_unthrottle(struct tty_struct * tty)
1216 {
1217         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1218 #ifdef _DEBUG_TTYFUNCS
1219         printk(KERN_DEBUG "capinc_tty_unthrottle\n");
1220 #endif
1221         if (mp) {
1222                 mp->ttyinstop = 0;
1223                 handle_minor_recv(mp);
1224         }
1225 }
1226
1227 static void capinc_tty_stop(struct tty_struct *tty)
1228 {
1229         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1230 #ifdef _DEBUG_TTYFUNCS
1231         printk(KERN_DEBUG "capinc_tty_stop\n");
1232 #endif
1233         if (mp) {
1234                 mp->ttyoutstop = 1;
1235         }
1236 }
1237
1238 static void capinc_tty_start(struct tty_struct *tty)
1239 {
1240         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1241 #ifdef _DEBUG_TTYFUNCS
1242         printk(KERN_DEBUG "capinc_tty_start\n");
1243 #endif
1244         if (mp) {
1245                 mp->ttyoutstop = 0;
1246                 (void)handle_minor_send(mp);
1247         }
1248 }
1249
1250 static void capinc_tty_hangup(struct tty_struct *tty)
1251 {
1252 #ifdef _DEBUG_TTYFUNCS
1253         printk(KERN_DEBUG "capinc_tty_hangup\n");
1254 #endif
1255 }
1256
1257 static void capinc_tty_break_ctl(struct tty_struct *tty, int state)
1258 {
1259 #ifdef _DEBUG_TTYFUNCS
1260         printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state);
1261 #endif
1262 }
1263
1264 static void capinc_tty_flush_buffer(struct tty_struct *tty)
1265 {
1266 #ifdef _DEBUG_TTYFUNCS
1267         printk(KERN_DEBUG "capinc_tty_flush_buffer\n");
1268 #endif
1269 }
1270
1271 static void capinc_tty_set_ldisc(struct tty_struct *tty)
1272 {
1273 #ifdef _DEBUG_TTYFUNCS
1274         printk(KERN_DEBUG "capinc_tty_set_ldisc\n");
1275 #endif
1276 }
1277
1278 static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
1279 {
1280 #ifdef _DEBUG_TTYFUNCS
1281         printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch);
1282 #endif
1283 }
1284
1285 static int capinc_tty_read_proc(char *page, char **start, off_t off,
1286                                 int count, int *eof, void *data)
1287 {
1288         return 0;
1289 }
1290
1291 static struct tty_driver *capinc_tty_driver;
1292
1293 static struct tty_operations capinc_ops = {
1294         .open = capinc_tty_open,
1295         .close = capinc_tty_close,
1296         .write = capinc_tty_write,
1297         .put_char = capinc_tty_put_char,
1298         .flush_chars = capinc_tty_flush_chars,
1299         .write_room = capinc_tty_write_room,
1300         .chars_in_buffer = capinc_tty_chars_in_buffer,
1301         .ioctl = capinc_tty_ioctl,
1302         .set_termios = capinc_tty_set_termios,
1303         .throttle = capinc_tty_throttle,
1304         .unthrottle = capinc_tty_unthrottle,
1305         .stop = capinc_tty_stop,
1306         .start = capinc_tty_start,
1307         .hangup = capinc_tty_hangup,
1308         .break_ctl = capinc_tty_break_ctl,
1309         .flush_buffer = capinc_tty_flush_buffer,
1310         .set_ldisc = capinc_tty_set_ldisc,
1311         .send_xchar = capinc_tty_send_xchar,
1312         .read_proc = capinc_tty_read_proc,
1313 };
1314
1315 static int capinc_tty_init(void)
1316 {
1317         struct tty_driver *drv;
1318         
1319         if (capi_ttyminors > CAPINC_MAX_PORTS)
1320                 capi_ttyminors = CAPINC_MAX_PORTS;
1321         if (capi_ttyminors <= 0)
1322                 capi_ttyminors = CAPINC_NR_PORTS;
1323
1324         drv = alloc_tty_driver(capi_ttyminors);
1325         if (!drv)
1326                 return -ENOMEM;
1327
1328         drv->owner = THIS_MODULE;
1329         drv->driver_name = "capi_nc";
1330         drv->devfs_name = "capi/";
1331         drv->name = "capi";
1332         drv->major = capi_ttymajor;
1333         drv->minor_start = 0;
1334         drv->type = TTY_DRIVER_TYPE_SERIAL;
1335         drv->subtype = SERIAL_TYPE_NORMAL;
1336         drv->init_termios = tty_std_termios;
1337         drv->init_termios.c_iflag = ICRNL;
1338         drv->init_termios.c_oflag = OPOST | ONLCR;
1339         drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1340         drv->init_termios.c_lflag = 0;
1341         drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS;
1342         tty_set_operations(drv, &capinc_ops);
1343         if (tty_register_driver(drv)) {
1344                 put_tty_driver(drv);
1345                 printk(KERN_ERR "Couldn't register capi_nc driver\n");
1346                 return -1;
1347         }
1348         capinc_tty_driver = drv;
1349         return 0;
1350 }
1351
1352 static void capinc_tty_exit(void)
1353 {
1354         struct tty_driver *drv = capinc_tty_driver;
1355         int retval;
1356         if ((retval = tty_unregister_driver(drv)))
1357                 printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval);
1358         put_tty_driver(drv);
1359 }
1360
1361 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
1362
1363 /* -------- /proc functions ----------------------------------------- */
1364
1365 /*
1366  * /proc/capi/capi20:
1367  *  minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
1368  */
1369 static int proc_capidev_read_proc(char *page, char **start, off_t off,
1370                                        int count, int *eof, void *data)
1371 {
1372         struct capidev *cdev;
1373         struct list_head *l;
1374         int len = 0;
1375
1376         read_lock(&capidev_list_lock);
1377         list_for_each(l, &capidev_list) {
1378                 cdev = list_entry(l, struct capidev, list);
1379                 len += sprintf(page+len, "0 %d %lu %lu %lu %lu\n",
1380                         cdev->ap.applid,
1381                         cdev->ap.nrecvctlpkt,
1382                         cdev->ap.nrecvdatapkt,
1383                         cdev->ap.nsentctlpkt,
1384                         cdev->ap.nsentdatapkt);
1385                 if (len <= off) {
1386                         off -= len;
1387                         len = 0;
1388                 } else {
1389                         if (len-off > count)
1390                                 goto endloop;
1391                 }
1392         }
1393
1394 endloop:
1395         read_unlock(&capidev_list_lock);
1396         if (len < count)
1397                 *eof = 1;
1398         if (len > count) len = count;
1399         if (len < 0) len = 0;
1400         return len;
1401 }
1402
1403 /*
1404  * /proc/capi/capi20ncci:
1405  *  applid ncci
1406  */
1407 static int proc_capincci_read_proc(char *page, char **start, off_t off,
1408                                        int count, int *eof, void *data)
1409 {
1410         struct capidev *cdev;
1411         struct capincci *np;
1412         struct list_head *l;
1413         int len = 0;
1414
1415         read_lock(&capidev_list_lock);
1416         list_for_each(l, &capidev_list) {
1417                 cdev = list_entry(l, struct capidev, list);
1418                 for (np=cdev->nccis; np; np = np->next) {
1419                         len += sprintf(page+len, "%d 0x%x\n",
1420                                        cdev->ap.applid,
1421                                        np->ncci);
1422                         if (len <= off) {
1423                                 off -= len;
1424                                 len = 0;
1425                         } else {
1426                                 if (len-off > count)
1427                                         goto endloop;
1428                         }
1429                 }
1430         }
1431 endloop:
1432         read_unlock(&capidev_list_lock);
1433         *start = page+off;
1434         if (len < count)
1435                 *eof = 1;
1436         if (len>count) len = count;
1437         if (len<0) len = 0;
1438         return len;
1439 }
1440
1441 static struct procfsentries {
1442   char *name;
1443   mode_t mode;
1444   int (*read_proc)(char *page, char **start, off_t off,
1445                                        int count, int *eof, void *data);
1446   struct proc_dir_entry *procent;
1447 } procfsentries[] = {
1448    /* { "capi",           S_IFDIR, 0 }, */
1449    { "capi/capi20",       0      , proc_capidev_read_proc },
1450    { "capi/capi20ncci",   0      , proc_capincci_read_proc },
1451 };
1452
1453 static void __init proc_init(void)
1454 {
1455     int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
1456     int i;
1457
1458     for (i=0; i < nelem; i++) {
1459         struct procfsentries *p = procfsentries + i;
1460         p->procent = create_proc_entry(p->name, p->mode, NULL);
1461         if (p->procent) p->procent->read_proc = p->read_proc;
1462     }
1463 }
1464
1465 static void __exit proc_exit(void)
1466 {
1467     int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
1468     int i;
1469
1470     for (i=nelem-1; i >= 0; i--) {
1471         struct procfsentries *p = procfsentries + i;
1472         if (p->procent) {
1473            remove_proc_entry(p->name, NULL);
1474            p->procent = NULL;
1475         }
1476     }
1477 }
1478
1479 /* -------- init function and module interface ---------------------- */
1480
1481
1482 static char rev[32];
1483
1484 static int __init capi_init(void)
1485 {
1486         char *p;
1487         char *compileinfo;
1488         int major_ret;
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         major_ret = register_chrdev(capi_major, "capi20", &capi_fops);
1498         if (major_ret < 0) {
1499                 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
1500                 return major_ret;
1501         }
1502         capi_major = major_ret;
1503         capi_class = class_create(THIS_MODULE, "capi");
1504         if (IS_ERR(capi_class)) {
1505                 unregister_chrdev(capi_major, "capi20");
1506                 return PTR_ERR(capi_class);
1507         }
1508
1509         class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
1510         devfs_mk_cdev(MKDEV(capi_major, 0), S_IFCHR | S_IRUSR | S_IWUSR,
1511                         "isdn/capi20");
1512
1513 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1514         if (capinc_tty_init() < 0) {
1515                 class_device_destroy(capi_class, MKDEV(capi_major, 0));
1516                 class_destroy(capi_class);
1517                 unregister_chrdev(capi_major, "capi20");
1518                 return -ENOMEM;
1519         }
1520 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
1521
1522         proc_init();
1523
1524 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1525 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
1526         compileinfo = " (middleware+capifs)";
1527 #else
1528         compileinfo = " (no capifs)";
1529 #endif
1530 #else
1531         compileinfo = " (no middleware)";
1532 #endif
1533         printk(KERN_NOTICE "capi20: Rev %s: started up with major %d%s\n",
1534                                 rev, capi_major, compileinfo);
1535
1536         return 0;
1537 }
1538
1539 static void __exit capi_exit(void)
1540 {
1541         proc_exit();
1542
1543         class_device_destroy(capi_class, MKDEV(capi_major, 0));
1544         class_destroy(capi_class);
1545         unregister_chrdev(capi_major, "capi20");
1546         devfs_remove("isdn/capi20");
1547
1548 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1549         capinc_tty_exit();
1550 #endif
1551         printk(KERN_NOTICE "capi: Rev %s: unloaded\n", rev);
1552 }
1553
1554 module_init(capi_init);
1555 module_exit(capi_exit);