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