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