drivers/isdn/capi/capi.c

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