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/devfs_fs_kernel.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_simple *capi_class;
  61
  62 int capi_major = 68;            /* allocated */
  63 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
  64 #define CAPINC_NR_PORTS 32
  65 #define CAPINC_MAX_PORTS        256
  66 int capi_ttymajor = 191;
  67 int capi_ttyminors = CAPINC_NR_PORTS;
  68 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
  69
  70 MODULE_PARM(capi_major, "i");
  71 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
  72 MODULE_PARM(capi_ttymajor, "i");
  73 MODULE_PARM(capi_ttyminors, "i");
  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 capiminor {
  90         struct list_head list;
  91         struct capincci  *nccip;
  92         unsigned int      minor;
  93
  94         struct capi20_appl *ap;
  95         u32              ncci;
  96         u16              datahandle;
  97         u16              msgid;
  98
  99         struct tty_struct *tty;
 100         int                ttyinstop;
 101         int                ttyoutstop;
 102         struct sk_buff    *ttyskb;
 103         atomic_t           ttyopencount;
 104
 105         struct sk_buff_head inqueue;
 106         int                 inbytes;
 107         struct sk_buff_head outqueue;
 108         int                 outbytes;
 109
 110         /* transmit path */
 111         struct datahandle_queue {
 112                     struct datahandle_queue *next;
 113                     u16                    datahandle;
 114         } *ackqueue;
 115         int nack;
 116
 117 };
 118 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
 119
 120 struct capincci {
 121         struct capincci *next;
 122         u32              ncci;
 123         struct capidev  *cdev;
 124 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
 125         struct capiminor *minorp;
 126 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
 127 };
 128
 129 struct capidev {
 130         struct list_head list;
 131         struct capi20_appl ap;
 132         u16             errcode;
 133         unsigned        userflags;
 134
 135         struct sk_buff_head recvqueue;
 136         wait_queue_head_t recvwait;
 137
 138         struct capincci *nccis;
 139
 140         struct semaphore ncci_list_sem;
 141 };
 142
 143 /* -------- global variables ---------------------------------------- */
 144
 145 static rwlock_t capidev_list_lock = RW_LOCK_UNLOCKED;
 146 static LIST_HEAD(capidev_list);
 147
 148 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
 149 static rwlock_t capiminor_list_lock = RW_LOCK_UNLOCKED;
 150 static LIST_HEAD(capiminor_list);
 151 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
 152
 153 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
 154 /* -------- datahandles --------------------------------------------- */
 155
 156 static int capincci_add_ack(struct capiminor *mp, u16 datahandle)
 157 {
 158         struct datahandle_queue *n, **pp;
 159
 160         n = kmalloc(sizeof(*n), GFP_ATOMIC);
 161         if (!n) {
 162            printk(KERN_ERR "capi: alloc datahandle failed\n");
 163            return -1;
 164         }
 165         n->next = NULL;
 166         n->datahandle = datahandle;
 167         for (pp = &mp->ackqueue; *pp; pp = &(*pp)->next) ;
 168         *pp = n;
 169         mp->nack++;
 170         return 0;
 171 }
 172
 173 static int capiminor_del_ack(struct capiminor *mp, u16 datahandle)
 174 {
 175         struct datahandle_queue **pp, *p;
 176
 177         for (pp = &mp->ackqueue; *pp; pp = &(*pp)->next) {
 178                 if ((*pp)->datahandle == datahandle) {
 179                         p = *pp;
 180                         *pp = (*pp)->next;
 181                         kfree(p);
 182                         mp->nack--;
 183                         return 0;
 184                 }
 185         }
 186         return -1;
 187 }
 188
 189 static void capiminor_del_all_ack(struct capiminor *mp)
 190 {
 191         struct datahandle_queue **pp, *p;
 192
 193         pp = &mp->ackqueue;
 194         while (*pp) {
 195                 p = *pp;
 196                 *pp = (*pp)->next;
 197                 kfree(p);
 198                 mp->nack--;
 199         }
 200 }
 201
 202
 203 /* -------- struct capiminor ---------------------------------------- */
 204
 205 static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
 206 {
 207         struct capiminor *mp, *p;
 208         unsigned int minor = 0;
 209         unsigned long flags;
 210
 211         mp = kmalloc(sizeof(*mp), GFP_ATOMIC);
 212         if (!mp) {
 213                 printk(KERN_ERR "capi: can't alloc capiminor\n");
 214                 return NULL;
 215         }
 216
 217         memset(mp, 0, sizeof(struct capiminor));
 218         mp->ap = ap;
 219         mp->ncci = ncci;
 220         mp->msgid = 0;
 221         atomic_set(&mp->ttyopencount,0);
 222
 223         skb_queue_head_init(&mp->inqueue);
 224         skb_queue_head_init(&mp->outqueue);
 225
 226         /* Allocate the least unused minor number.
 227          */
 228         write_lock_irqsave(&capiminor_list_lock, flags);
 229         if (list_empty(&capiminor_list))
 230                 list_add(&mp->list, &capiminor_list);
 231         else {
 232                 list_for_each_entry(p, &capiminor_list, list) {
 233                         if (p->minor > minor)
 234                                 break;
 235                         minor++;
 236                 }
 237
 238                 if (minor < capi_ttyminors) {
 239                         mp->minor = minor;
 240                         list_add(&mp->list, p->list.prev);
 241                 }
 242         }
 243                 write_unlock_irqrestore(&capiminor_list_lock, flags);
 244
 245         if (!(minor < capi_ttyminors)) {
 246                 printk(KERN_NOTICE "capi: out of minors\n");
 247                         kfree(mp);
 248                 return NULL;
 249         }
 250
 251         return mp;
 252 }
 253
 254 static void capiminor_free(struct capiminor *mp)
 255 {
 256         unsigned long flags;
 257
 258         write_lock_irqsave(&capiminor_list_lock, flags);
 259         list_del(&mp->list);
 260         write_unlock_irqrestore(&capiminor_list_lock, flags);
 261
 262         if (mp->ttyskb) kfree_skb(mp->ttyskb);
 263         mp->ttyskb = NULL;
 264         skb_queue_purge(&mp->inqueue);
 265         skb_queue_purge(&mp->outqueue);
 266         capiminor_del_all_ack(mp);
 267         kfree(mp);
 268 }
 269
 270 struct capiminor *capiminor_find(unsigned int minor)
 271 {
 272         struct list_head *l;
 273         struct capiminor *p = NULL;
 274
 275         read_lock(&capiminor_list_lock);
 276         list_for_each(l, &capiminor_list) {
 277                 p = list_entry(l, struct capiminor, list);
 278                 if (p->minor == minor)
 279                         break;
 280         }
 281         read_unlock(&capiminor_list_lock);
 282         if (l == &capiminor_list)
 283                 return NULL;
 284
 285         return p;
 286 }
 287 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
 288
 289 /* -------- struct capincci ----------------------------------------- */
 290
 291 static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci)
 292 {
 293         struct capincci *np, **pp;
 294 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
 295         struct capiminor *mp = NULL;
 296 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
 297
 298         np = kmalloc(sizeof(*np), GFP_ATOMIC);
 299         if (!np)
 300                 return NULL;
 301         memset(np, 0, sizeof(struct capincci));
 302         np->ncci = ncci;
 303         np->cdev = cdev;
 304 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
 305         mp = NULL;
 306         if (cdev->userflags & CAPIFLAG_HIGHJACKING)
 307                 mp = np->minorp = capiminor_alloc(&cdev->ap, ncci);
 308         if (mp) {
 309                 mp->nccip = np;
 310 #ifdef _DEBUG_REFCOUNT
 311                 printk(KERN_DEBUG "set mp->nccip\n");
 312 #endif
 313 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
 314                 capifs_new_ncci(mp->minor, MKDEV(capi_ttymajor, mp->minor));
 315 #endif
 316         }
 317 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
 318         for (pp=&cdev->nccis; *pp; pp = &(*pp)->next)
 319                 ;
 320         *pp = np;
 321         return np;
 322 }
 323
 324 static void capincci_free(struct capidev *cdev, u32 ncci)
 325 {
 326         struct capincci *np, **pp;
 327 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
 328         struct capiminor *mp;
 329 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
 330
 331         pp=&cdev->nccis;
 332         while (*pp) {
 333                 np = *pp;
 334                 if (ncci == 0xffffffff || np->ncci == ncci) {
 335                         *pp = (*pp)->next;
 336 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
 337                         if ((mp = np->minorp) != 0) {
 338 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
 339                                 capifs_free_ncci(mp->minor);
 340 #endif
 341                                 if (mp->tty) {
 342                                         mp->nccip = NULL;
 343 #ifdef _DEBUG_REFCOUNT
 344                                         printk(KERN_DEBUG "reset mp->nccip\n");
 345 #endif
 346                                         tty_hangup(mp->tty);
 347                                 } else {
 348                                         capiminor_free(mp);
 349                                 }
 350                         }
 351 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
 352                         kfree(np);
 353                         if (*pp == 0) return;
 354                 } else {
 355                         pp = &(*pp)->next;
 356                 }
 357         }
 358 }
 359
 360 static struct capincci *capincci_find(struct capidev *cdev, u32 ncci)
 361 {
 362         struct capincci *p;
 363
 364         for (p=cdev->nccis; p ; p = p->next) {
 365                 if (p->ncci == ncci)
 366                         break;
 367         }
 368         return p;
 369 }
 370
 371 /* -------- struct capidev ------------------------------------------ */
 372
 373 static struct capidev *capidev_alloc(void)
 374 {
 375         struct capidev *cdev;
 376         unsigned long flags;
 377
 378         cdev = kmalloc(sizeof(*cdev), GFP_KERNEL);
 379         if (!cdev)
 380                 return NULL;
 381         memset(cdev, 0, sizeof(struct capidev));
 382
 383         init_MUTEX(&cdev->ncci_list_sem);
 384         skb_queue_head_init(&cdev->recvqueue);
 385         init_waitqueue_head(&cdev->recvwait);
 386         write_lock_irqsave(&capidev_list_lock, flags);
 387         list_add_tail(&cdev->list, &capidev_list);
 388         write_unlock_irqrestore(&capidev_list_lock, flags);
 389         return cdev;
 390 }
 391
 392 static void capidev_free(struct capidev *cdev)
 393 {
 394         unsigned long flags;
 395
 396         if (cdev->ap.applid) {
 397                 capi20_release(&cdev->ap);
 398                 cdev->ap.applid = 0;
 399         }
 400         skb_queue_purge(&cdev->recvqueue);
 401
 402         down(&cdev->ncci_list_sem);
 403         capincci_free(cdev, 0xffffffff);
 404         up(&cdev->ncci_list_sem);
 405
 406         write_lock_irqsave(&capidev_list_lock, flags);
 407         list_del(&cdev->list);
 408         write_unlock_irqrestore(&capidev_list_lock, flags);
 409         kfree(cdev);
 410 }
 411
 412 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
 413 /* -------- handle data queue --------------------------------------- */
 414
 415 static struct sk_buff *
 416 gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb)
 417 {
 418         struct sk_buff *nskb;
 419         nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC);
 420         if (nskb) {
 421                 u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2);
 422                 unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN);
 423                 capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN);
 424                 capimsg_setu16(s, 2, mp->ap->applid);
 425                 capimsg_setu8 (s, 4, CAPI_DATA_B3);
 426                 capimsg_setu8 (s, 5, CAPI_RESP);
 427                 capimsg_setu16(s, 6, mp->msgid++);
 428                 capimsg_setu32(s, 8, mp->ncci);
 429                 capimsg_setu16(s, 12, datahandle);
 430         }
 431         return nskb;
 432 }
 433
 434 static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb)
 435 {
 436         struct sk_buff *nskb;
 437         int datalen;
 438         u16 errcode, datahandle;
 439         struct tty_ldisc *ld;
 440
 441         datalen = skb->len - CAPIMSG_LEN(skb->data);
 442         if (mp->tty == NULL)
 443         {
 444 #ifdef _DEBUG_DATAFLOW
 445                 printk(KERN_DEBUG "capi: currently no receiver\n");
 446 #endif
 447                 return -1;
 448         }
 449
 450         ld = tty_ldisc_ref(mp->tty);
 451         if (ld == NULL)
 452                 return -1;
 453         if (ld->receive_buf == NULL) {
 454 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
 455                 printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n");
 456 #endif
 457                 goto bad;
 458         }
 459         if (mp->ttyinstop) {
 460 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS)
 461                 printk(KERN_DEBUG "capi: recv tty throttled\n");
 462 #endif
 463                 goto bad;
 464         }
 465         if (ld->receive_room &&
 466             ld->receive_room(mp->tty) < 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, int from_user,
1048                             const unsigned char *buf, int count)
1049 {
1050         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1051         struct sk_buff *skb;
1052         int retval;
1053
1054 #ifdef _DEBUG_TTYFUNCS
1055         printk(KERN_DEBUG "capinc_tty_write(from_user=%d,count=%d)\n",
1056                                 from_user, count);
1057 #endif
1058
1059         if (!mp || !mp->nccip) {
1060 #ifdef _DEBUG_TTYFUNCS
1061                 printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n");
1062 #endif
1063                 return 0;
1064         }
1065
1066         skb = mp->ttyskb;
1067         if (skb) {
1068                 mp->ttyskb = NULL;
1069                 skb_queue_tail(&mp->outqueue, skb);
1070                 mp->outbytes += skb->len;
1071         }
1072
1073         skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC);
1074         if (!skb) {
1075                 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n");
1076                 return -ENOMEM;
1077         }
1078
1079         skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1080         if (from_user) {
1081                 retval = copy_from_user(skb_put(skb, count), buf, count);
1082                 if (retval) {
1083                         kfree_skb(skb);
1084 #ifdef _DEBUG_TTYFUNCS
1085                         printk(KERN_DEBUG "capinc_tty_write: copy_from_user=%d\n", retval);
1086 #endif
1087                         return -EFAULT;
1088                 }
1089         } else {
1090                 memcpy(skb_put(skb, count), buf, count);
1091         }
1092
1093         skb_queue_tail(&mp->outqueue, skb);
1094         mp->outbytes += skb->len;
1095         (void)handle_minor_send(mp);
1096         (void)handle_minor_recv(mp);
1097         return count;
1098 }
1099
1100 static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch)
1101 {
1102         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1103         struct sk_buff *skb;
1104
1105 #ifdef _DEBUG_TTYFUNCS
1106         printk(KERN_DEBUG "capinc_put_char(%u)\n", ch);
1107 #endif
1108
1109         if (!mp || !mp->nccip) {
1110 #ifdef _DEBUG_TTYFUNCS
1111                 printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n");
1112 #endif
1113                 return;
1114         }
1115
1116         skb = mp->ttyskb;
1117         if (skb) {
1118                 if (skb_tailroom(skb) > 0) {
1119                         *(skb_put(skb, 1)) = ch;
1120                         return;
1121                 }
1122                 mp->ttyskb = NULL;
1123                 skb_queue_tail(&mp->outqueue, skb);
1124                 mp->outbytes += skb->len;
1125                 (void)handle_minor_send(mp);
1126         }
1127         skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC);
1128         if (skb) {
1129                 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN);
1130                 *(skb_put(skb, 1)) = ch;
1131                 mp->ttyskb = skb;
1132         } else {
1133                 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch);
1134         }
1135 }
1136
1137 static void capinc_tty_flush_chars(struct tty_struct *tty)
1138 {
1139         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1140         struct sk_buff *skb;
1141
1142 #ifdef _DEBUG_TTYFUNCS
1143         printk(KERN_DEBUG "capinc_tty_flush_chars\n");
1144 #endif
1145
1146         if (!mp || !mp->nccip) {
1147 #ifdef _DEBUG_TTYFUNCS
1148                 printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n");
1149 #endif
1150                 return;
1151         }
1152
1153         skb = mp->ttyskb;
1154         if (skb) {
1155                 mp->ttyskb = NULL;
1156                 skb_queue_tail(&mp->outqueue, skb);
1157                 mp->outbytes += skb->len;
1158                 (void)handle_minor_send(mp);
1159         }
1160         (void)handle_minor_recv(mp);
1161 }
1162
1163 static int capinc_tty_write_room(struct tty_struct *tty)
1164 {
1165         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1166         int room;
1167         if (!mp || !mp->nccip) {
1168 #ifdef _DEBUG_TTYFUNCS
1169                 printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n");
1170 #endif
1171                 return 0;
1172         }
1173         room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue);
1174         room *= CAPI_MAX_BLKSIZE;
1175 #ifdef _DEBUG_TTYFUNCS
1176         printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room);
1177 #endif
1178         return room;
1179 }
1180
1181 int capinc_tty_chars_in_buffer(struct tty_struct *tty)
1182 {
1183         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1184         if (!mp || !mp->nccip) {
1185 #ifdef _DEBUG_TTYFUNCS
1186                 printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n");
1187 #endif
1188                 return 0;
1189         }
1190 #ifdef _DEBUG_TTYFUNCS
1191         printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n",
1192                         mp->outbytes, mp->nack,
1193                         skb_queue_len(&mp->outqueue),
1194                         skb_queue_len(&mp->inqueue));
1195 #endif
1196         return mp->outbytes;
1197 }
1198
1199 static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file,
1200                     unsigned int cmd, unsigned long arg)
1201 {
1202         int error = 0;
1203         switch (cmd) {
1204         default:
1205                 error = n_tty_ioctl (tty, file, cmd, arg);
1206                 break;
1207         }
1208         return error;
1209 }
1210
1211 static void capinc_tty_set_termios(struct tty_struct *tty, struct termios * old)
1212 {
1213 #ifdef _DEBUG_TTYFUNCS
1214         printk(KERN_DEBUG "capinc_tty_set_termios\n");
1215 #endif
1216 }
1217
1218 static void capinc_tty_throttle(struct tty_struct * tty)
1219 {
1220         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1221 #ifdef _DEBUG_TTYFUNCS
1222         printk(KERN_DEBUG "capinc_tty_throttle\n");
1223 #endif
1224         if (mp)
1225                 mp->ttyinstop = 1;
1226 }
1227
1228 static void capinc_tty_unthrottle(struct tty_struct * tty)
1229 {
1230         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1231 #ifdef _DEBUG_TTYFUNCS
1232         printk(KERN_DEBUG "capinc_tty_unthrottle\n");
1233 #endif
1234         if (mp) {
1235                 mp->ttyinstop = 0;
1236                 handle_minor_recv(mp);
1237         }
1238 }
1239
1240 static void capinc_tty_stop(struct tty_struct *tty)
1241 {
1242         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1243 #ifdef _DEBUG_TTYFUNCS
1244         printk(KERN_DEBUG "capinc_tty_stop\n");
1245 #endif
1246         if (mp) {
1247                 mp->ttyoutstop = 1;
1248         }
1249 }
1250
1251 static void capinc_tty_start(struct tty_struct *tty)
1252 {
1253         struct capiminor *mp = (struct capiminor *)tty->driver_data;
1254 #ifdef _DEBUG_TTYFUNCS
1255         printk(KERN_DEBUG "capinc_tty_start\n");
1256 #endif
1257         if (mp) {
1258                 mp->ttyoutstop = 0;
1259                 (void)handle_minor_send(mp);
1260         }
1261 }
1262
1263 static void capinc_tty_hangup(struct tty_struct *tty)
1264 {
1265 #ifdef _DEBUG_TTYFUNCS
1266         printk(KERN_DEBUG "capinc_tty_hangup\n");
1267 #endif
1268 }
1269
1270 static void capinc_tty_break_ctl(struct tty_struct *tty, int state)
1271 {
1272 #ifdef _DEBUG_TTYFUNCS
1273         printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state);
1274 #endif
1275 }
1276
1277 static void capinc_tty_flush_buffer(struct tty_struct *tty)
1278 {
1279 #ifdef _DEBUG_TTYFUNCS
1280         printk(KERN_DEBUG "capinc_tty_flush_buffer\n");
1281 #endif
1282 }
1283
1284 static void capinc_tty_set_ldisc(struct tty_struct *tty)
1285 {
1286 #ifdef _DEBUG_TTYFUNCS
1287         printk(KERN_DEBUG "capinc_tty_set_ldisc\n");
1288 #endif
1289 }
1290
1291 static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
1292 {
1293 #ifdef _DEBUG_TTYFUNCS
1294         printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch);
1295 #endif
1296 }
1297
1298 static int capinc_tty_read_proc(char *page, char **start, off_t off,
1299                                 int count, int *eof, void *data)
1300 {
1301         return 0;
1302 }
1303
1304 static struct tty_driver *capinc_tty_driver;
1305
1306 static struct tty_operations capinc_ops = {
1307         .open = capinc_tty_open,
1308         .close = capinc_tty_close,
1309         .write = capinc_tty_write,
1310         .put_char = capinc_tty_put_char,
1311         .flush_chars = capinc_tty_flush_chars,
1312         .write_room = capinc_tty_write_room,
1313         .chars_in_buffer = capinc_tty_chars_in_buffer,
1314         .ioctl = capinc_tty_ioctl,
1315         .set_termios = capinc_tty_set_termios,
1316         .throttle = capinc_tty_throttle,
1317         .unthrottle = capinc_tty_unthrottle,
1318         .stop = capinc_tty_stop,
1319         .start = capinc_tty_start,
1320         .hangup = capinc_tty_hangup,
1321         .break_ctl = capinc_tty_break_ctl,
1322         .flush_buffer = capinc_tty_flush_buffer,
1323         .set_ldisc = capinc_tty_set_ldisc,
1324         .send_xchar = capinc_tty_send_xchar,
1325         .read_proc = capinc_tty_read_proc,
1326 };
1327
1328 static int capinc_tty_init(void)
1329 {
1330         struct tty_driver *drv;
1331
1332         if (capi_ttyminors > CAPINC_MAX_PORTS)
1333                 capi_ttyminors = CAPINC_MAX_PORTS;
1334         if (capi_ttyminors <= 0)
1335                 capi_ttyminors = CAPINC_NR_PORTS;
1336
1337         drv = alloc_tty_driver(capi_ttyminors);
1338         if (!drv)
1339                 return -ENOMEM;
1340
1341         drv->owner = THIS_MODULE;
1342         drv->driver_name = "capi_nc";
1343         drv->devfs_name = "capi/";
1344         drv->name = "capi";
1345         drv->major = capi_ttymajor;
1346         drv->minor_start = 0;
1347         drv->type = TTY_DRIVER_TYPE_SERIAL;
1348         drv->subtype = SERIAL_TYPE_NORMAL;
1349         drv->init_termios = tty_std_termios;
1350         drv->init_termios.c_iflag = ICRNL;
1351         drv->init_termios.c_oflag = OPOST | ONLCR;
1352         drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1353         drv->init_termios.c_lflag = 0;
1354         drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS;
1355         tty_set_operations(drv, &capinc_ops);
1356         if (tty_register_driver(drv)) {
1357                 put_tty_driver(drv);
1358                 printk(KERN_ERR "Couldn't register capi_nc driver\n");
1359                 return -1;
1360         }
1361         capinc_tty_driver = drv;
1362         return 0;
1363 }
1364
1365 static void capinc_tty_exit(void)
1366 {
1367         struct tty_driver *drv = capinc_tty_driver;
1368         int retval;
1369         if ((retval = tty_unregister_driver(drv)))
1370                 printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval);
1371         put_tty_driver(drv);
1372 }
1373
1374 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
1375
1376 /* -------- /proc functions ----------------------------------------- */
1377
1378 /*
1379  * /proc/capi/capi20:
1380  *  minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
1381  */
1382 static int proc_capidev_read_proc(char *page, char **start, off_t off,
1383                                        int count, int *eof, void *data)
1384 {
1385         struct capidev *cdev;
1386         struct list_head *l;
1387         int len = 0;
1388
1389         read_lock(&capidev_list_lock);
1390         list_for_each(l, &capidev_list) {
1391                 cdev = list_entry(l, struct capidev, list);
1392                 len += sprintf(page+len, "0 %d %lu %lu %lu %lu\n",
1393                         cdev->ap.applid,
1394                         cdev->ap.nrecvctlpkt,
1395                         cdev->ap.nrecvdatapkt,
1396                         cdev->ap.nsentctlpkt,
1397                         cdev->ap.nsentdatapkt);
1398                 if (len <= off) {
1399                         off -= len;
1400                         len = 0;
1401                 } else {
1402                         if (len-off > count)
1403                                 goto endloop;
1404                 }
1405         }
1406
1407 endloop:
1408         read_unlock(&capidev_list_lock);
1409         if (len < count)
1410                 *eof = 1;
1411         if (len > count) len = count;
1412         if (len < 0) len = 0;
1413         return len;
1414 }
1415
1416 /*
1417  * /proc/capi/capi20ncci:
1418  *  applid ncci
1419  */
1420 static int proc_capincci_read_proc(char *page, char **start, off_t off,
1421                                        int count, int *eof, void *data)
1422 {
1423         struct capidev *cdev;
1424         struct capincci *np;
1425         struct list_head *l;
1426         int len = 0;
1427
1428         read_lock(&capidev_list_lock);
1429         list_for_each(l, &capidev_list) {
1430                 cdev = list_entry(l, struct capidev, list);
1431                 for (np=cdev->nccis; np; np = np->next) {
1432                         len += sprintf(page+len, "%d 0x%x\n",
1433                                        cdev->ap.applid,
1434                                        np->ncci);
1435                         if (len <= off) {
1436                                 off -= len;
1437                                 len = 0;
1438                         } else {
1439                                 if (len-off > count)
1440                                         goto endloop;
1441                         }
1442                 }
1443         }
1444 endloop:
1445         read_unlock(&capidev_list_lock);
1446         *start = page+off;
1447         if (len < count)
1448                 *eof = 1;
1449         if (len>count) len = count;
1450         if (len<0) len = 0;
1451         return len;
1452 }
1453
1454 static struct procfsentries {
1455   char *name;
1456   mode_t mode;
1457   int (*read_proc)(char *page, char **start, off_t off,
1458                                        int count, int *eof, void *data);
1459   struct proc_dir_entry *procent;
1460 } procfsentries[] = {
1461    /* { "capi",           S_IFDIR, 0 }, */
1462    { "capi/capi20",       0      , proc_capidev_read_proc },
1463    { "capi/capi20ncci",   0      , proc_capincci_read_proc },
1464 };
1465
1466 static void __init proc_init(void)
1467 {
1468     int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
1469     int i;
1470
1471     for (i=0; i < nelem; i++) {
1472         struct procfsentries *p = procfsentries + i;
1473         p->procent = create_proc_entry(p->name, p->mode, NULL);
1474         if (p->procent) p->procent->read_proc = p->read_proc;
1475     }
1476 }
1477
1478 static void __exit proc_exit(void)
1479 {
1480     int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]);
1481     int i;
1482
1483     for (i=nelem-1; i >= 0; i--) {
1484         struct procfsentries *p = procfsentries + i;
1485         if (p->procent) {
1486            remove_proc_entry(p->name, NULL);
1487            p->procent = NULL;
1488         }
1489     }
1490 }
1491
1492 /* -------- init function and module interface ---------------------- */
1493
1494
1495 static char rev[32];
1496
1497 static int __init capi_init(void)
1498 {
1499         char *p;
1500         char *compileinfo;
1501
1502         if ((p = strchr(revision, ':')) != 0 && p[1]) {
1503                 strlcpy(rev, p + 2, sizeof(rev));
1504                 if ((p = strchr(rev, '$')) != 0 && p > rev)
1505                    *(p-1) = 0;
1506         } else
1507                 strcpy(rev, "1.0");
1508
1509         if (register_chrdev(capi_major, "capi20", &capi_fops)) {
1510                 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
1511                 return -EIO;
1512         }
1513
1514         capi_class = class_simple_create(THIS_MODULE, "capi");
1515         if (IS_ERR(capi_class)) {
1516                 unregister_chrdev(capi_major, "capi20");
1517                 return PTR_ERR(capi_class);
1518         }
1519
1520         class_simple_device_add(capi_class, MKDEV(capi_major, 0), NULL, "capi");
1521         devfs_mk_cdev(MKDEV(capi_major, 0), S_IFCHR | S_IRUSR | S_IWUSR,
1522                         "isdn/capi20");
1523
1524 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1525         if (capinc_tty_init() < 0) {
1526                 class_simple_device_remove(MKDEV(capi_major, 0));
1527                 class_simple_destroy(capi_class);
1528                 unregister_chrdev(capi_major, "capi20");
1529                 return -ENOMEM;
1530         }
1531 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
1532
1533         proc_init();
1534
1535 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1536 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
1537         compileinfo = " (middleware+capifs)";
1538 #else
1539         compileinfo = " (no capifs)";
1540 #endif
1541 #else
1542         compileinfo = " (no middleware)";
1543 #endif
1544         printk(KERN_NOTICE "capi20: Rev %s: started up with major %d%s\n",
1545                                 rev, capi_major, compileinfo);
1546
1547         return 0;
1548 }
1549
1550 static void __exit capi_exit(void)
1551 {
1552         proc_exit();
1553
1554         class_simple_device_remove(MKDEV(capi_major, 0));
1555         class_simple_destroy(capi_class);
1556         unregister_chrdev(capi_major, "capi20");
1557         devfs_remove("isdn/capi20");
1558
1559 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
1560         capinc_tty_exit();
1561 #endif
1562         printk(KERN_NOTICE "capi: Rev %s: unloaded\n", rev);
1563 }
1564
1565 module_init(capi_init);
1566 module_exit(capi_exit);