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