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/module.h> 13 #include <linux/errno.h> 14 #include <linux/kernel.h> 15 #include <linux/major.h> 16 #include <linux/sched.h> 17 #include <linux/slab.h> 18 #include <linux/fcntl.h> 19 #include <linux/fs.h> 20 #include <linux/signal.h> 21 #include <linux/mm.h> 22 #include <linux/smp_lock.h> 23 #include <linux/timer.h> 24 #include <linux/wait.h> 25 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 26 #include <linux/tty.h> 27 #ifdef CONFIG_PPP 28 #include <linux/netdevice.h> 29 #include <linux/ppp_defs.h> 30 #include <linux/if_ppp.h> 31 #endif /* CONFIG_PPP */ 32 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 33 #include <linux/skbuff.h> 34 #include <linux/proc_fs.h> 35 #include <linux/poll.h> 36 #include <linux/capi.h> 37 #include <linux/kernelcapi.h> 38 #include <linux/init.h> 39 #include <linux/device.h> 40 #include <linux/moduleparam.h> 41 #include <linux/isdn/capiutil.h> 42 #include <linux/isdn/capicmd.h> 43 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) 44 #include "capifs.h" 45 #endif 46 47 static char *revision = "$Revision: 1.1.2.7 $"; 48 49 MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface"); 50 MODULE_AUTHOR("Carsten Paeth"); 51 MODULE_LICENSE("GPL"); 52 53 #undef _DEBUG_REFCOUNT /* alloc/free and open/close debug */ 54 #undef _DEBUG_TTYFUNCS /* call to tty_driver */ 55 #undef _DEBUG_DATAFLOW /* data flow */ 56 57 /* -------- driver information -------------------------------------- */ 58 59 static struct class *capi_class; 60 61 static int capi_major = 68; /* allocated */ 62 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 63 #define CAPINC_NR_PORTS 32 64 #define CAPINC_MAX_PORTS 256 65 static int capi_ttymajor = 191; 66 static int capi_ttyminors = CAPINC_NR_PORTS; 67 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 68 69 module_param_named(major, capi_major, uint, 0); 70 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 71 module_param_named(ttymajor, capi_ttymajor, uint, 0); 72 module_param_named(ttyminors, capi_ttyminors, uint, 0); 73 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 74 75 /* -------- defines ------------------------------------------------- */ 76 77 #define CAPINC_MAX_RECVQUEUE 10 78 #define CAPINC_MAX_SENDQUEUE 10 79 #define CAPI_MAX_BLKSIZE 2048 80 81 /* -------- data structures ----------------------------------------- */ 82 83 struct capidev; 84 struct capincci; 85 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 86 struct capiminor; 87 88 struct datahandle_queue { 89 struct list_head list; 90 u16 datahandle; 91 }; 92 93 struct capiminor { 94 struct list_head list; 95 struct capincci *nccip; 96 unsigned int minor; 97 98 struct capi20_appl *ap; 99 u32 ncci; 100 u16 datahandle; 101 u16 msgid; 102 103 struct tty_struct *tty; 104 int ttyinstop; 105 int ttyoutstop; 106 struct sk_buff *ttyskb; 107 atomic_t ttyopencount; 108 109 struct sk_buff_head inqueue; 110 int inbytes; 111 struct sk_buff_head outqueue; 112 int outbytes; 113 114 /* transmit path */ 115 struct list_head ackqueue; 116 int nack; 117 spinlock_t ackqlock; 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; 160 unsigned long flags; 161 162 n = kmalloc(sizeof(*n), GFP_ATOMIC); 163 if (unlikely(!n)) { 164 printk(KERN_ERR "capi: alloc datahandle failed\n"); 165 return -1; 166 } 167 n->datahandle = datahandle; 168 INIT_LIST_HEAD(&n->list); 169 spin_lock_irqsave(&mp->ackqlock, flags); 170 list_add_tail(&n->list, &mp->ackqueue); 171 mp->nack++; 172 spin_unlock_irqrestore(&mp->ackqlock, flags); 173 return 0; 174 } 175 176 static int capiminor_del_ack(struct capiminor *mp, u16 datahandle) 177 { 178 struct datahandle_queue *p, *tmp; 179 unsigned long flags; 180 181 spin_lock_irqsave(&mp->ackqlock, flags); 182 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { 183 if (p->datahandle == datahandle) { 184 list_del(&p->list); 185 kfree(p); 186 mp->nack--; 187 spin_unlock_irqrestore(&mp->ackqlock, flags); 188 return 0; 189 } 190 } 191 spin_unlock_irqrestore(&mp->ackqlock, flags); 192 return -1; 193 } 194 195 static void capiminor_del_all_ack(struct capiminor *mp) 196 { 197 struct datahandle_queue *p, *tmp; 198 unsigned long flags; 199 200 spin_lock_irqsave(&mp->ackqlock, flags); 201 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { 202 list_del(&p->list); 203 kfree(p); 204 mp->nack--; 205 } 206 spin_unlock_irqrestore(&mp->ackqlock, flags); 207 } 208 209 210 /* -------- struct capiminor ---------------------------------------- */ 211 212 static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) 213 { 214 struct capiminor *mp, *p; 215 unsigned int minor = 0; 216 unsigned long flags; 217 218 mp = kzalloc(sizeof(*mp), GFP_ATOMIC); 219 if (!mp) { 220 printk(KERN_ERR "capi: can't alloc capiminor\n"); 221 return NULL; 222 } 223 224 mp->ap = ap; 225 mp->ncci = ncci; 226 mp->msgid = 0; 227 atomic_set(&mp->ttyopencount,0); 228 INIT_LIST_HEAD(&mp->ackqueue); 229 spin_lock_init(&mp->ackqlock); 230 231 skb_queue_head_init(&mp->inqueue); 232 skb_queue_head_init(&mp->outqueue); 233 234 /* Allocate the least unused minor number. 235 */ 236 write_lock_irqsave(&capiminor_list_lock, flags); 237 if (list_empty(&capiminor_list)) 238 list_add(&mp->list, &capiminor_list); 239 else { 240 list_for_each_entry(p, &capiminor_list, list) { 241 if (p->minor > minor) 242 break; 243 minor++; 244 } 245 246 if (minor < capi_ttyminors) { 247 mp->minor = minor; 248 list_add(&mp->list, p->list.prev); 249 } 250 } 251 write_unlock_irqrestore(&capiminor_list_lock, flags); 252 253 if (!(minor < capi_ttyminors)) { 254 printk(KERN_NOTICE "capi: out of minors\n"); 255 kfree(mp); 256 return NULL; 257 } 258 259 return mp; 260 } 261 262 static void capiminor_free(struct capiminor *mp) 263 { 264 unsigned long flags; 265 266 write_lock_irqsave(&capiminor_list_lock, flags); 267 list_del(&mp->list); 268 write_unlock_irqrestore(&capiminor_list_lock, flags); 269 270 if (mp->ttyskb) kfree_skb(mp->ttyskb); 271 mp->ttyskb = NULL; 272 skb_queue_purge(&mp->inqueue); 273 skb_queue_purge(&mp->outqueue); 274 capiminor_del_all_ack(mp); 275 kfree(mp); 276 } 277 278 static struct capiminor *capiminor_find(unsigned int minor) 279 { 280 struct list_head *l; 281 struct capiminor *p = NULL; 282 283 read_lock(&capiminor_list_lock); 284 list_for_each(l, &capiminor_list) { 285 p = list_entry(l, struct capiminor, list); 286 if (p->minor == minor) 287 break; 288 } 289 read_unlock(&capiminor_list_lock); 290 if (l == &capiminor_list) 291 return NULL; 292 293 return p; 294 } 295 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 296 297 /* -------- struct capincci ----------------------------------------- */ 298 299 static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci) 300 { 301 struct capincci *np, **pp; 302 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 303 struct capiminor *mp = NULL; 304 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 305 306 np = kzalloc(sizeof(*np), GFP_ATOMIC); 307 if (!np) 308 return NULL; 309 np->ncci = ncci; 310 np->cdev = cdev; 311 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 312 mp = NULL; 313 if (cdev->userflags & CAPIFLAG_HIGHJACKING) 314 mp = np->minorp = capiminor_alloc(&cdev->ap, ncci); 315 if (mp) { 316 mp->nccip = np; 317 #ifdef _DEBUG_REFCOUNT 318 printk(KERN_DEBUG "set mp->nccip\n"); 319 #endif 320 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) 321 capifs_new_ncci(mp->minor, MKDEV(capi_ttymajor, mp->minor)); 322 #endif 323 } 324 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 325 for (pp=&cdev->nccis; *pp; pp = &(*pp)->next) 326 ; 327 *pp = np; 328 return np; 329 } 330 331 static void capincci_free(struct capidev *cdev, u32 ncci) 332 { 333 struct capincci *np, **pp; 334 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 335 struct capiminor *mp; 336 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 337 338 pp=&cdev->nccis; 339 while (*pp) { 340 np = *pp; 341 if (ncci == 0xffffffff || np->ncci == ncci) { 342 *pp = (*pp)->next; 343 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 344 if ((mp = np->minorp) != 0) { 345 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) 346 capifs_free_ncci(mp->minor); 347 #endif 348 if (mp->tty) { 349 mp->nccip = NULL; 350 #ifdef _DEBUG_REFCOUNT 351 printk(KERN_DEBUG "reset mp->nccip\n"); 352 #endif 353 tty_hangup(mp->tty); 354 } else { 355 capiminor_free(mp); 356 } 357 } 358 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 359 kfree(np); 360 if (*pp == 0) return; 361 } else { 362 pp = &(*pp)->next; 363 } 364 } 365 } 366 367 static struct capincci *capincci_find(struct capidev *cdev, u32 ncci) 368 { 369 struct capincci *p; 370 371 for (p=cdev->nccis; p ; p = p->next) { 372 if (p->ncci == ncci) 373 break; 374 } 375 return p; 376 } 377 378 /* -------- struct capidev ------------------------------------------ */ 379 380 static struct capidev *capidev_alloc(void) 381 { 382 struct capidev *cdev; 383 unsigned long flags; 384 385 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); 386 if (!cdev) 387 return NULL; 388 389 init_MUTEX(&cdev->ncci_list_sem); 390 skb_queue_head_init(&cdev->recvqueue); 391 init_waitqueue_head(&cdev->recvwait); 392 write_lock_irqsave(&capidev_list_lock, flags); 393 list_add_tail(&cdev->list, &capidev_list); 394 write_unlock_irqrestore(&capidev_list_lock, flags); 395 return cdev; 396 } 397 398 static void capidev_free(struct capidev *cdev) 399 { 400 unsigned long flags; 401 402 if (cdev->ap.applid) { 403 capi20_release(&cdev->ap); 404 cdev->ap.applid = 0; 405 } 406 skb_queue_purge(&cdev->recvqueue); 407 408 down(&cdev->ncci_list_sem); 409 capincci_free(cdev, 0xffffffff); 410 up(&cdev->ncci_list_sem); 411 412 write_lock_irqsave(&capidev_list_lock, flags); 413 list_del(&cdev->list); 414 write_unlock_irqrestore(&capidev_list_lock, flags); 415 kfree(cdev); 416 } 417 418 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 419 /* -------- handle data queue --------------------------------------- */ 420 421 static struct sk_buff * 422 gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb) 423 { 424 struct sk_buff *nskb; 425 nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_ATOMIC); 426 if (nskb) { 427 u16 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4+4+2); 428 unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN); 429 capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN); 430 capimsg_setu16(s, 2, mp->ap->applid); 431 capimsg_setu8 (s, 4, CAPI_DATA_B3); 432 capimsg_setu8 (s, 5, CAPI_RESP); 433 capimsg_setu16(s, 6, mp->msgid++); 434 capimsg_setu32(s, 8, mp->ncci); 435 capimsg_setu16(s, 12, datahandle); 436 } 437 return nskb; 438 } 439 440 static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb) 441 { 442 struct sk_buff *nskb; 443 int datalen; 444 u16 errcode, datahandle; 445 struct tty_ldisc *ld; 446 447 datalen = skb->len - CAPIMSG_LEN(skb->data); 448 if (mp->tty == NULL) 449 { 450 #ifdef _DEBUG_DATAFLOW 451 printk(KERN_DEBUG "capi: currently no receiver\n"); 452 #endif 453 return -1; 454 } 455 456 ld = tty_ldisc_ref(mp->tty); 457 if (ld == NULL) 458 return -1; 459 if (ld->receive_buf == NULL) { 460 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) 461 printk(KERN_DEBUG "capi: ldisc has no receive_buf function\n"); 462 #endif 463 goto bad; 464 } 465 if (mp->ttyinstop) { 466 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) 467 printk(KERN_DEBUG "capi: recv tty throttled\n"); 468 #endif 469 goto bad; 470 } 471 if (mp->tty->receive_room < datalen) { 472 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) 473 printk(KERN_DEBUG "capi: no room in tty\n"); 474 #endif 475 goto bad; 476 } 477 if ((nskb = gen_data_b3_resp_for(mp, skb)) == 0) { 478 printk(KERN_ERR "capi: gen_data_b3_resp failed\n"); 479 goto bad; 480 } 481 datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4); 482 errcode = capi20_put_message(mp->ap, nskb); 483 if (errcode != CAPI_NOERROR) { 484 printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n", 485 errcode); 486 kfree_skb(nskb); 487 goto bad; 488 } 489 (void)skb_pull(skb, CAPIMSG_LEN(skb->data)); 490 #ifdef _DEBUG_DATAFLOW 491 printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n", 492 datahandle, skb->len); 493 #endif 494 ld->receive_buf(mp->tty, skb->data, NULL, skb->len); 495 kfree_skb(skb); 496 tty_ldisc_deref(ld); 497 return 0; 498 bad: 499 tty_ldisc_deref(ld); 500 return -1; 501 } 502 503 static void handle_minor_recv(struct capiminor *mp) 504 { 505 struct sk_buff *skb; 506 while ((skb = skb_dequeue(&mp->inqueue)) != 0) { 507 unsigned int len = skb->len; 508 mp->inbytes -= len; 509 if (handle_recv_skb(mp, skb) < 0) { 510 skb_queue_head(&mp->inqueue, skb); 511 mp->inbytes += len; 512 return; 513 } 514 } 515 } 516 517 static int handle_minor_send(struct capiminor *mp) 518 { 519 struct sk_buff *skb; 520 u16 len; 521 int count = 0; 522 u16 errcode; 523 u16 datahandle; 524 525 if (mp->tty && mp->ttyoutstop) { 526 #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) 527 printk(KERN_DEBUG "capi: send: tty stopped\n"); 528 #endif 529 return 0; 530 } 531 532 while ((skb = skb_dequeue(&mp->outqueue)) != 0) { 533 datahandle = mp->datahandle; 534 len = (u16)skb->len; 535 skb_push(skb, CAPI_DATA_B3_REQ_LEN); 536 memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); 537 capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN); 538 capimsg_setu16(skb->data, 2, mp->ap->applid); 539 capimsg_setu8 (skb->data, 4, CAPI_DATA_B3); 540 capimsg_setu8 (skb->data, 5, CAPI_REQ); 541 capimsg_setu16(skb->data, 6, mp->msgid++); 542 capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */ 543 capimsg_setu32(skb->data, 12, (u32) skb->data); /* Data32 */ 544 capimsg_setu16(skb->data, 16, len); /* Data length */ 545 capimsg_setu16(skb->data, 18, datahandle); 546 capimsg_setu16(skb->data, 20, 0); /* Flags */ 547 548 if (capincci_add_ack(mp, datahandle) < 0) { 549 skb_pull(skb, CAPI_DATA_B3_REQ_LEN); 550 skb_queue_head(&mp->outqueue, skb); 551 return count; 552 } 553 errcode = capi20_put_message(mp->ap, skb); 554 if (errcode == CAPI_NOERROR) { 555 mp->datahandle++; 556 count++; 557 mp->outbytes -= len; 558 #ifdef _DEBUG_DATAFLOW 559 printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n", 560 datahandle, len); 561 #endif 562 continue; 563 } 564 capiminor_del_ack(mp, datahandle); 565 566 if (errcode == CAPI_SENDQUEUEFULL) { 567 skb_pull(skb, CAPI_DATA_B3_REQ_LEN); 568 skb_queue_head(&mp->outqueue, skb); 569 break; 570 } 571 572 /* ups, drop packet */ 573 printk(KERN_ERR "capi: put_message = %x\n", errcode); 574 mp->outbytes -= len; 575 kfree_skb(skb); 576 } 577 return count; 578 } 579 580 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 581 /* -------- function called by lower level -------------------------- */ 582 583 static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) 584 { 585 struct capidev *cdev = ap->private; 586 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 587 struct capiminor *mp; 588 u16 datahandle; 589 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 590 struct capincci *np; 591 u32 ncci; 592 593 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { 594 u16 info = CAPIMSG_U16(skb->data, 12); // Info field 595 if (info == 0) { 596 down(&cdev->ncci_list_sem); 597 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); 598 up(&cdev->ncci_list_sem); 599 } 600 } 601 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) { 602 down(&cdev->ncci_list_sem); 603 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); 604 up(&cdev->ncci_list_sem); 605 } 606 if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { 607 skb_queue_tail(&cdev->recvqueue, skb); 608 wake_up_interruptible(&cdev->recvwait); 609 return; 610 } 611 ncci = CAPIMSG_CONTROL(skb->data); 612 for (np = cdev->nccis; np && np->ncci != ncci; np = np->next) 613 ; 614 if (!np) { 615 printk(KERN_ERR "BUG: capi_signal: ncci not found\n"); 616 skb_queue_tail(&cdev->recvqueue, skb); 617 wake_up_interruptible(&cdev->recvwait); 618 return; 619 } 620 #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE 621 skb_queue_tail(&cdev->recvqueue, skb); 622 wake_up_interruptible(&cdev->recvwait); 623 #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 624 mp = np->minorp; 625 if (!mp) { 626 skb_queue_tail(&cdev->recvqueue, skb); 627 wake_up_interruptible(&cdev->recvwait); 628 return; 629 } 630 631 632 if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) { 633 634 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2); 635 #ifdef _DEBUG_DATAFLOW 636 printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n", 637 datahandle, skb->len-CAPIMSG_LEN(skb->data)); 638 #endif 639 skb_queue_tail(&mp->inqueue, skb); 640 mp->inbytes += skb->len; 641 handle_minor_recv(mp); 642 643 } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) { 644 645 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4); 646 #ifdef _DEBUG_DATAFLOW 647 printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n", 648 datahandle, 649 CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2)); 650 #endif 651 kfree_skb(skb); 652 (void)capiminor_del_ack(mp, datahandle); 653 if (mp->tty) 654 tty_wakeup(mp->tty); 655 (void)handle_minor_send(mp); 656 657 } else { 658 /* ups, let capi application handle it :-) */ 659 skb_queue_tail(&cdev->recvqueue, skb); 660 wake_up_interruptible(&cdev->recvwait); 661 } 662 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 663 } 664 665 /* -------- file_operations for capidev ----------------------------- */ 666 667 static ssize_t 668 capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) 669 { 670 struct capidev *cdev = (struct capidev *)file->private_data; 671 struct sk_buff *skb; 672 size_t copied; 673 674 if (!cdev->ap.applid) 675 return -ENODEV; 676 677 if ((skb = skb_dequeue(&cdev->recvqueue)) == 0) { 678 679 if (file->f_flags & O_NONBLOCK) 680 return -EAGAIN; 681 682 for (;;) { 683 interruptible_sleep_on(&cdev->recvwait); 684 if ((skb = skb_dequeue(&cdev->recvqueue)) != 0) 685 break; 686 if (signal_pending(current)) 687 break; 688 } 689 if (skb == 0) 690 return -ERESTARTNOHAND; 691 } 692 if (skb->len > count) { 693 skb_queue_head(&cdev->recvqueue, skb); 694 return -EMSGSIZE; 695 } 696 if (copy_to_user(buf, skb->data, skb->len)) { 697 skb_queue_head(&cdev->recvqueue, skb); 698 return -EFAULT; 699 } 700 copied = skb->len; 701 702 kfree_skb(skb); 703 704 return copied; 705 } 706 707 static ssize_t 708 capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) 709 { 710 struct capidev *cdev = (struct capidev *)file->private_data; 711 struct sk_buff *skb; 712 u16 mlen; 713 714 if (!cdev->ap.applid) 715 return -ENODEV; 716 717 skb = alloc_skb(count, GFP_USER); 718 if (!skb) 719 return -ENOMEM; 720 721 if (copy_from_user(skb_put(skb, count), buf, count)) { 722 kfree_skb(skb); 723 return -EFAULT; 724 } 725 mlen = CAPIMSG_LEN(skb->data); 726 if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) { 727 if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) { 728 kfree_skb(skb); 729 return -EINVAL; 730 } 731 } else { 732 if (mlen != count) { 733 kfree_skb(skb); 734 return -EINVAL; 735 } 736 } 737 CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); 738 739 if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { 740 down(&cdev->ncci_list_sem); 741 capincci_free(cdev, CAPIMSG_NCCI(skb->data)); 742 up(&cdev->ncci_list_sem); 743 } 744 745 cdev->errcode = capi20_put_message(&cdev->ap, skb); 746 747 if (cdev->errcode) { 748 kfree_skb(skb); 749 return -EIO; 750 } 751 return count; 752 } 753 754 static unsigned int 755 capi_poll(struct file *file, poll_table * wait) 756 { 757 struct capidev *cdev = (struct capidev *)file->private_data; 758 unsigned int mask = 0; 759 760 if (!cdev->ap.applid) 761 return POLLERR; 762 763 poll_wait(file, &(cdev->recvwait), wait); 764 mask = POLLOUT | POLLWRNORM; 765 if (!skb_queue_empty(&cdev->recvqueue)) 766 mask |= POLLIN | POLLRDNORM; 767 return mask; 768 } 769 770 static int 771 capi_ioctl(struct inode *inode, struct file *file, 772 unsigned int cmd, unsigned long arg) 773 { 774 struct capidev *cdev = file->private_data; 775 struct capi20_appl *ap = &cdev->ap; 776 capi_ioctl_struct data; 777 int retval = -EINVAL; 778 void __user *argp = (void __user *)arg; 779 780 switch (cmd) { 781 case CAPI_REGISTER: 782 { 783 if (ap->applid) 784 return -EEXIST; 785 786 if (copy_from_user(&cdev->ap.rparam, argp, 787 sizeof(struct capi_register_params))) 788 return -EFAULT; 789 790 cdev->ap.private = cdev; 791 cdev->ap.recv_message = capi_recv_message; 792 cdev->errcode = capi20_register(ap); 793 if (cdev->errcode) { 794 ap->applid = 0; 795 return -EIO; 796 } 797 } 798 return (int)ap->applid; 799 800 case CAPI_GET_VERSION: 801 { 802 if (copy_from_user(&data.contr, argp, 803 sizeof(data.contr))) 804 return -EFAULT; 805 cdev->errcode = capi20_get_version(data.contr, &data.version); 806 if (cdev->errcode) 807 return -EIO; 808 if (copy_to_user(argp, &data.version, 809 sizeof(data.version))) 810 return -EFAULT; 811 } 812 return 0; 813 814 case CAPI_GET_SERIAL: 815 { 816 if (copy_from_user(&data.contr, argp, 817 sizeof(data.contr))) 818 return -EFAULT; 819 cdev->errcode = capi20_get_serial (data.contr, data.serial); 820 if (cdev->errcode) 821 return -EIO; 822 if (copy_to_user(argp, data.serial, 823 sizeof(data.serial))) 824 return -EFAULT; 825 } 826 return 0; 827 case CAPI_GET_PROFILE: 828 { 829 if (copy_from_user(&data.contr, argp, 830 sizeof(data.contr))) 831 return -EFAULT; 832 833 if (data.contr == 0) { 834 cdev->errcode = capi20_get_profile(data.contr, &data.profile); 835 if (cdev->errcode) 836 return -EIO; 837 838 retval = copy_to_user(argp, 839 &data.profile.ncontroller, 840 sizeof(data.profile.ncontroller)); 841 842 } else { 843 cdev->errcode = capi20_get_profile(data.contr, &data.profile); 844 if (cdev->errcode) 845 return -EIO; 846 847 retval = copy_to_user(argp, &data.profile, 848 sizeof(data.profile)); 849 } 850 if (retval) 851 return -EFAULT; 852 } 853 return 0; 854 855 case CAPI_GET_MANUFACTURER: 856 { 857 if (copy_from_user(&data.contr, argp, 858 sizeof(data.contr))) 859 return -EFAULT; 860 cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer); 861 if (cdev->errcode) 862 return -EIO; 863 864 if (copy_to_user(argp, data.manufacturer, 865 sizeof(data.manufacturer))) 866 return -EFAULT; 867 868 } 869 return 0; 870 case CAPI_GET_ERRCODE: 871 data.errcode = cdev->errcode; 872 cdev->errcode = CAPI_NOERROR; 873 if (arg) { 874 if (copy_to_user(argp, &data.errcode, 875 sizeof(data.errcode))) 876 return -EFAULT; 877 } 878 return data.errcode; 879 880 case CAPI_INSTALLED: 881 if (capi20_isinstalled() == CAPI_NOERROR) 882 return 0; 883 return -ENXIO; 884 885 case CAPI_MANUFACTURER_CMD: 886 { 887 struct capi_manufacturer_cmd mcmd; 888 if (!capable(CAP_SYS_ADMIN)) 889 return -EPERM; 890 if (copy_from_user(&mcmd, argp, sizeof(mcmd))) 891 return -EFAULT; 892 return capi20_manufacturer(mcmd.cmd, mcmd.data); 893 } 894 return 0; 895 896 case CAPI_SET_FLAGS: 897 case CAPI_CLR_FLAGS: 898 { 899 unsigned userflags; 900 if (copy_from_user(&userflags, argp, 901 sizeof(userflags))) 902 return -EFAULT; 903 if (cmd == CAPI_SET_FLAGS) 904 cdev->userflags |= userflags; 905 else 906 cdev->userflags &= ~userflags; 907 } 908 return 0; 909 910 case CAPI_GET_FLAGS: 911 if (copy_to_user(argp, &cdev->userflags, 912 sizeof(cdev->userflags))) 913 return -EFAULT; 914 return 0; 915 916 case CAPI_NCCI_OPENCOUNT: 917 { 918 struct capincci *nccip; 919 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 920 struct capiminor *mp; 921 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 922 unsigned ncci; 923 int count = 0; 924 if (copy_from_user(&ncci, argp, sizeof(ncci))) 925 return -EFAULT; 926 927 down(&cdev->ncci_list_sem); 928 if ((nccip = capincci_find(cdev, (u32) ncci)) == 0) { 929 up(&cdev->ncci_list_sem); 930 return 0; 931 } 932 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 933 if ((mp = nccip->minorp) != 0) { 934 count += atomic_read(&mp->ttyopencount); 935 } 936 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 937 up(&cdev->ncci_list_sem); 938 return count; 939 } 940 return 0; 941 942 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 943 case CAPI_NCCI_GETUNIT: 944 { 945 struct capincci *nccip; 946 struct capiminor *mp; 947 unsigned ncci; 948 int unit = 0; 949 if (copy_from_user(&ncci, argp, 950 sizeof(ncci))) 951 return -EFAULT; 952 down(&cdev->ncci_list_sem); 953 nccip = capincci_find(cdev, (u32) ncci); 954 if (!nccip || (mp = nccip->minorp) == 0) { 955 up(&cdev->ncci_list_sem); 956 return -ESRCH; 957 } 958 unit = mp->minor; 959 up(&cdev->ncci_list_sem); 960 return unit; 961 } 962 return 0; 963 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 964 } 965 return -EINVAL; 966 } 967 968 static int 969 capi_open(struct inode *inode, struct file *file) 970 { 971 if (file->private_data) 972 return -EEXIST; 973 974 if ((file->private_data = capidev_alloc()) == 0) 975 return -ENOMEM; 976 977 return nonseekable_open(inode, file); 978 } 979 980 static int 981 capi_release(struct inode *inode, struct file *file) 982 { 983 struct capidev *cdev = (struct capidev *)file->private_data; 984 985 capidev_free(cdev); 986 file->private_data = NULL; 987 988 return 0; 989 } 990 991 static struct file_operations capi_fops = 992 { 993 .owner = THIS_MODULE, 994 .llseek = no_llseek, 995 .read = capi_read, 996 .write = capi_write, 997 .poll = capi_poll, 998 .ioctl = capi_ioctl, 999 .open = capi_open, 1000 .release = capi_release, 1001 }; 1002 1003 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 1004 /* -------- tty_operations for capincci ----------------------------- */ 1005 1006 static int capinc_tty_open(struct tty_struct * tty, struct file * file) 1007 { 1008 struct capiminor *mp; 1009 1010 if ((mp = capiminor_find(iminor(file->f_path.dentry->d_inode))) == 0) 1011 return -ENXIO; 1012 if (mp->nccip == 0) 1013 return -ENXIO; 1014 1015 tty->driver_data = (void *)mp; 1016 1017 if (atomic_read(&mp->ttyopencount) == 0) 1018 mp->tty = tty; 1019 atomic_inc(&mp->ttyopencount); 1020 #ifdef _DEBUG_REFCOUNT 1021 printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount)); 1022 #endif 1023 handle_minor_recv(mp); 1024 return 0; 1025 } 1026 1027 static void capinc_tty_close(struct tty_struct * tty, struct file * file) 1028 { 1029 struct capiminor *mp; 1030 1031 mp = (struct capiminor *)tty->driver_data; 1032 if (mp) { 1033 if (atomic_dec_and_test(&mp->ttyopencount)) { 1034 #ifdef _DEBUG_REFCOUNT 1035 printk(KERN_DEBUG "capinc_tty_close lastclose\n"); 1036 #endif 1037 tty->driver_data = NULL; 1038 mp->tty = NULL; 1039 } 1040 #ifdef _DEBUG_REFCOUNT 1041 printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount)); 1042 #endif 1043 if (mp->nccip == 0) 1044 capiminor_free(mp); 1045 } 1046 1047 #ifdef _DEBUG_REFCOUNT 1048 printk(KERN_DEBUG "capinc_tty_close\n"); 1049 #endif 1050 } 1051 1052 static int capinc_tty_write(struct tty_struct * tty, 1053 const unsigned char *buf, int count) 1054 { 1055 struct capiminor *mp = (struct capiminor *)tty->driver_data; 1056 struct sk_buff *skb; 1057 1058 #ifdef _DEBUG_TTYFUNCS 1059 printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count); 1060 #endif 1061 1062 if (!mp || !mp->nccip) { 1063 #ifdef _DEBUG_TTYFUNCS 1064 printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n"); 1065 #endif 1066 return 0; 1067 } 1068 1069 skb = mp->ttyskb; 1070 if (skb) { 1071 mp->ttyskb = NULL; 1072 skb_queue_tail(&mp->outqueue, skb); 1073 mp->outbytes += skb->len; 1074 } 1075 1076 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC); 1077 if (!skb) { 1078 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n"); 1079 return -ENOMEM; 1080 } 1081 1082 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); 1083 memcpy(skb_put(skb, count), buf, count); 1084 1085 skb_queue_tail(&mp->outqueue, skb); 1086 mp->outbytes += skb->len; 1087 (void)handle_minor_send(mp); 1088 (void)handle_minor_recv(mp); 1089 return count; 1090 } 1091 1092 static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch) 1093 { 1094 struct capiminor *mp = (struct capiminor *)tty->driver_data; 1095 struct sk_buff *skb; 1096 1097 #ifdef _DEBUG_TTYFUNCS 1098 printk(KERN_DEBUG "capinc_put_char(%u)\n", ch); 1099 #endif 1100 1101 if (!mp || !mp->nccip) { 1102 #ifdef _DEBUG_TTYFUNCS 1103 printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n"); 1104 #endif 1105 return; 1106 } 1107 1108 skb = mp->ttyskb; 1109 if (skb) { 1110 if (skb_tailroom(skb) > 0) { 1111 *(skb_put(skb, 1)) = ch; 1112 return; 1113 } 1114 mp->ttyskb = NULL; 1115 skb_queue_tail(&mp->outqueue, skb); 1116 mp->outbytes += skb->len; 1117 (void)handle_minor_send(mp); 1118 } 1119 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC); 1120 if (skb) { 1121 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); 1122 *(skb_put(skb, 1)) = ch; 1123 mp->ttyskb = skb; 1124 } else { 1125 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch); 1126 } 1127 } 1128 1129 static void capinc_tty_flush_chars(struct tty_struct *tty) 1130 { 1131 struct capiminor *mp = (struct capiminor *)tty->driver_data; 1132 struct sk_buff *skb; 1133 1134 #ifdef _DEBUG_TTYFUNCS 1135 printk(KERN_DEBUG "capinc_tty_flush_chars\n"); 1136 #endif 1137 1138 if (!mp || !mp->nccip) { 1139 #ifdef _DEBUG_TTYFUNCS 1140 printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n"); 1141 #endif 1142 return; 1143 } 1144 1145 skb = mp->ttyskb; 1146 if (skb) { 1147 mp->ttyskb = NULL; 1148 skb_queue_tail(&mp->outqueue, skb); 1149 mp->outbytes += skb->len; 1150 (void)handle_minor_send(mp); 1151 } 1152 (void)handle_minor_recv(mp); 1153 } 1154 1155 static int capinc_tty_write_room(struct tty_struct *tty) 1156 { 1157 struct capiminor *mp = (struct capiminor *)tty->driver_data; 1158 int room; 1159 if (!mp || !mp->nccip) { 1160 #ifdef _DEBUG_TTYFUNCS 1161 printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n"); 1162 #endif 1163 return 0; 1164 } 1165 room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue); 1166 room *= CAPI_MAX_BLKSIZE; 1167 #ifdef _DEBUG_TTYFUNCS 1168 printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room); 1169 #endif 1170 return room; 1171 } 1172 1173 static int capinc_tty_chars_in_buffer(struct tty_struct *tty) 1174 { 1175 struct capiminor *mp = (struct capiminor *)tty->driver_data; 1176 if (!mp || !mp->nccip) { 1177 #ifdef _DEBUG_TTYFUNCS 1178 printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n"); 1179 #endif 1180 return 0; 1181 } 1182 #ifdef _DEBUG_TTYFUNCS 1183 printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n", 1184 mp->outbytes, mp->nack, 1185 skb_queue_len(&mp->outqueue), 1186 skb_queue_len(&mp->inqueue)); 1187 #endif 1188 return mp->outbytes; 1189 } 1190 1191 static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file, 1192 unsigned int cmd, unsigned long arg) 1193 { 1194 int error = 0; 1195 switch (cmd) { 1196 default: 1197 error = n_tty_ioctl (tty, file, cmd, arg); 1198 break; 1199 } 1200 return error; 1201 } 1202 1203 static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios * old) 1204 { 1205 #ifdef _DEBUG_TTYFUNCS 1206 printk(KERN_DEBUG "capinc_tty_set_termios\n"); 1207 #endif 1208 } 1209 1210 static void capinc_tty_throttle(struct tty_struct * tty) 1211 { 1212 struct capiminor *mp = (struct capiminor *)tty->driver_data; 1213 #ifdef _DEBUG_TTYFUNCS 1214 printk(KERN_DEBUG "capinc_tty_throttle\n"); 1215 #endif 1216 if (mp) 1217 mp->ttyinstop = 1; 1218 } 1219 1220 static void capinc_tty_unthrottle(struct tty_struct * tty) 1221 { 1222 struct capiminor *mp = (struct capiminor *)tty->driver_data; 1223 #ifdef _DEBUG_TTYFUNCS 1224 printk(KERN_DEBUG "capinc_tty_unthrottle\n"); 1225 #endif 1226 if (mp) { 1227 mp->ttyinstop = 0; 1228 handle_minor_recv(mp); 1229 } 1230 } 1231 1232 static void capinc_tty_stop(struct tty_struct *tty) 1233 { 1234 struct capiminor *mp = (struct capiminor *)tty->driver_data; 1235 #ifdef _DEBUG_TTYFUNCS 1236 printk(KERN_DEBUG "capinc_tty_stop\n"); 1237 #endif 1238 if (mp) { 1239 mp->ttyoutstop = 1; 1240 } 1241 } 1242 1243 static void capinc_tty_start(struct tty_struct *tty) 1244 { 1245 struct capiminor *mp = (struct capiminor *)tty->driver_data; 1246 #ifdef _DEBUG_TTYFUNCS 1247 printk(KERN_DEBUG "capinc_tty_start\n"); 1248 #endif 1249 if (mp) { 1250 mp->ttyoutstop = 0; 1251 (void)handle_minor_send(mp); 1252 } 1253 } 1254 1255 static void capinc_tty_hangup(struct tty_struct *tty) 1256 { 1257 #ifdef _DEBUG_TTYFUNCS 1258 printk(KERN_DEBUG "capinc_tty_hangup\n"); 1259 #endif 1260 } 1261 1262 static void capinc_tty_break_ctl(struct tty_struct *tty, int state) 1263 { 1264 #ifdef _DEBUG_TTYFUNCS 1265 printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state); 1266 #endif 1267 } 1268 1269 static void capinc_tty_flush_buffer(struct tty_struct *tty) 1270 { 1271 #ifdef _DEBUG_TTYFUNCS 1272 printk(KERN_DEBUG "capinc_tty_flush_buffer\n"); 1273 #endif 1274 } 1275 1276 static void capinc_tty_set_ldisc(struct tty_struct *tty) 1277 { 1278 #ifdef _DEBUG_TTYFUNCS 1279 printk(KERN_DEBUG "capinc_tty_set_ldisc\n"); 1280 #endif 1281 } 1282 1283 static void capinc_tty_send_xchar(struct tty_struct *tty, char ch) 1284 { 1285 #ifdef _DEBUG_TTYFUNCS 1286 printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch); 1287 #endif 1288 } 1289 1290 static int capinc_tty_read_proc(char *page, char **start, off_t off, 1291 int count, int *eof, void *data) 1292 { 1293 return 0; 1294 } 1295 1296 static struct tty_driver *capinc_tty_driver; 1297 1298 static const struct tty_operations capinc_ops = { 1299 .open = capinc_tty_open, 1300 .close = capinc_tty_close, 1301 .write = capinc_tty_write, 1302 .put_char = capinc_tty_put_char, 1303 .flush_chars = capinc_tty_flush_chars, 1304 .write_room = capinc_tty_write_room, 1305 .chars_in_buffer = capinc_tty_chars_in_buffer, 1306 .ioctl = capinc_tty_ioctl, 1307 .set_termios = capinc_tty_set_termios, 1308 .throttle = capinc_tty_throttle, 1309 .unthrottle = capinc_tty_unthrottle, 1310 .stop = capinc_tty_stop, 1311 .start = capinc_tty_start, 1312 .hangup = capinc_tty_hangup, 1313 .break_ctl = capinc_tty_break_ctl, 1314 .flush_buffer = capinc_tty_flush_buffer, 1315 .set_ldisc = capinc_tty_set_ldisc, 1316 .send_xchar = capinc_tty_send_xchar, 1317 .read_proc = capinc_tty_read_proc, 1318 }; 1319 1320 static int capinc_tty_init(void) 1321 { 1322 struct tty_driver *drv; 1323 1324 if (capi_ttyminors > CAPINC_MAX_PORTS) 1325 capi_ttyminors = CAPINC_MAX_PORTS; 1326 if (capi_ttyminors <= 0) 1327 capi_ttyminors = CAPINC_NR_PORTS; 1328 1329 drv = alloc_tty_driver(capi_ttyminors); 1330 if (!drv) 1331 return -ENOMEM; 1332 1333 drv->owner = THIS_MODULE; 1334 drv->driver_name = "capi_nc"; 1335 drv->name = "capi"; 1336 drv->major = capi_ttymajor; 1337 drv->minor_start = 0; 1338 drv->type = TTY_DRIVER_TYPE_SERIAL; 1339 drv->subtype = SERIAL_TYPE_NORMAL; 1340 drv->init_termios = tty_std_termios; 1341 drv->init_termios.c_iflag = ICRNL; 1342 drv->init_termios.c_oflag = OPOST | ONLCR; 1343 drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; 1344 drv->init_termios.c_lflag = 0; 1345 drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS; 1346 tty_set_operations(drv, &capinc_ops); 1347 if (tty_register_driver(drv)) { 1348 put_tty_driver(drv); 1349 printk(KERN_ERR "Couldn't register capi_nc driver\n"); 1350 return -1; 1351 } 1352 capinc_tty_driver = drv; 1353 return 0; 1354 } 1355 1356 static void capinc_tty_exit(void) 1357 { 1358 struct tty_driver *drv = capinc_tty_driver; 1359 int retval; 1360 if ((retval = tty_unregister_driver(drv))) 1361 printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval); 1362 put_tty_driver(drv); 1363 } 1364 1365 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 1366 1367 /* -------- /proc functions ----------------------------------------- */ 1368 1369 /* 1370 * /proc/capi/capi20: 1371 * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt 1372 */ 1373 static int proc_capidev_read_proc(char *page, char **start, off_t off, 1374 int count, int *eof, void *data) 1375 { 1376 struct capidev *cdev; 1377 struct list_head *l; 1378 int len = 0; 1379 1380 read_lock(&capidev_list_lock); 1381 list_for_each(l, &capidev_list) { 1382 cdev = list_entry(l, struct capidev, list); 1383 len += sprintf(page+len, "0 %d %lu %lu %lu %lu\n", 1384 cdev->ap.applid, 1385 cdev->ap.nrecvctlpkt, 1386 cdev->ap.nrecvdatapkt, 1387 cdev->ap.nsentctlpkt, 1388 cdev->ap.nsentdatapkt); 1389 if (len <= off) { 1390 off -= len; 1391 len = 0; 1392 } else { 1393 if (len-off > count) 1394 goto endloop; 1395 } 1396 } 1397 1398 endloop: 1399 read_unlock(&capidev_list_lock); 1400 if (len < count) 1401 *eof = 1; 1402 if (len > count) len = count; 1403 if (len < 0) len = 0; 1404 return len; 1405 } 1406 1407 /* 1408 * /proc/capi/capi20ncci: 1409 * applid ncci 1410 */ 1411 static int proc_capincci_read_proc(char *page, char **start, off_t off, 1412 int count, int *eof, void *data) 1413 { 1414 struct capidev *cdev; 1415 struct capincci *np; 1416 struct list_head *l; 1417 int len = 0; 1418 1419 read_lock(&capidev_list_lock); 1420 list_for_each(l, &capidev_list) { 1421 cdev = list_entry(l, struct capidev, list); 1422 for (np=cdev->nccis; np; np = np->next) { 1423 len += sprintf(page+len, "%d 0x%x\n", 1424 cdev->ap.applid, 1425 np->ncci); 1426 if (len <= off) { 1427 off -= len; 1428 len = 0; 1429 } else { 1430 if (len-off > count) 1431 goto endloop; 1432 } 1433 } 1434 } 1435 endloop: 1436 read_unlock(&capidev_list_lock); 1437 *start = page+off; 1438 if (len < count) 1439 *eof = 1; 1440 if (len>count) len = count; 1441 if (len<0) len = 0; 1442 return len; 1443 } 1444 1445 static struct procfsentries { 1446 char *name; 1447 mode_t mode; 1448 int (*read_proc)(char *page, char **start, off_t off, 1449 int count, int *eof, void *data); 1450 struct proc_dir_entry *procent; 1451 } procfsentries[] = { 1452 /* { "capi", S_IFDIR, 0 }, */ 1453 { "capi/capi20", 0 , proc_capidev_read_proc }, 1454 { "capi/capi20ncci", 0 , proc_capincci_read_proc }, 1455 }; 1456 1457 static void __init proc_init(void) 1458 { 1459 int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]); 1460 int i; 1461 1462 for (i=0; i < nelem; i++) { 1463 struct procfsentries *p = procfsentries + i; 1464 p->procent = create_proc_entry(p->name, p->mode, NULL); 1465 if (p->procent) p->procent->read_proc = p->read_proc; 1466 } 1467 } 1468 1469 static void __exit proc_exit(void) 1470 { 1471 int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]); 1472 int i; 1473 1474 for (i=nelem-1; i >= 0; i--) { 1475 struct procfsentries *p = procfsentries + i; 1476 if (p->procent) { 1477 remove_proc_entry(p->name, NULL); 1478 p->procent = NULL; 1479 } 1480 } 1481 } 1482 1483 /* -------- init function and module interface ---------------------- */ 1484 1485 1486 static char rev[32]; 1487 1488 static int __init capi_init(void) 1489 { 1490 char *p; 1491 char *compileinfo; 1492 int major_ret; 1493 1494 if ((p = strchr(revision, ':')) != 0 && p[1]) { 1495 strlcpy(rev, p + 2, sizeof(rev)); 1496 if ((p = strchr(rev, '$')) != 0 && p > rev) 1497 *(p-1) = 0; 1498 } else 1499 strcpy(rev, "1.0"); 1500 1501 major_ret = register_chrdev(capi_major, "capi20", &capi_fops); 1502 if (major_ret < 0) { 1503 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major); 1504 return major_ret; 1505 } 1506 capi_class = class_create(THIS_MODULE, "capi"); 1507 if (IS_ERR(capi_class)) { 1508 unregister_chrdev(capi_major, "capi20"); 1509 return PTR_ERR(capi_class); 1510 } 1511 1512 class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi"); 1513 1514 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 1515 if (capinc_tty_init() < 0) { 1516 class_device_destroy(capi_class, MKDEV(capi_major, 0)); 1517 class_destroy(capi_class); 1518 unregister_chrdev(capi_major, "capi20"); 1519 return -ENOMEM; 1520 } 1521 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 1522 1523 proc_init(); 1524 1525 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 1526 #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) 1527 compileinfo = " (middleware+capifs)"; 1528 #else 1529 compileinfo = " (no capifs)"; 1530 #endif 1531 #else 1532 compileinfo = " (no middleware)"; 1533 #endif 1534 printk(KERN_NOTICE "capi20: Rev %s: started up with major %d%s\n", 1535 rev, capi_major, compileinfo); 1536 1537 return 0; 1538 } 1539 1540 static void __exit capi_exit(void) 1541 { 1542 proc_exit(); 1543 1544 class_device_destroy(capi_class, MKDEV(capi_major, 0)); 1545 class_destroy(capi_class); 1546 unregister_chrdev(capi_major, "capi20"); 1547 1548 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 1549 capinc_tty_exit(); 1550 #endif 1551 printk(KERN_NOTICE "capi: Rev %s: unloaded\n", rev); 1552 } 1553 1554 module_init(capi_init); 1555 module_exit(capi_exit); 1556