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/mutex.h> 22 #include <linux/mm.h> 23 #include <linux/timer.h> 24 #include <linux/wait.h> 25 #include <linux/tty.h> 26 #include <linux/netdevice.h> 27 #include <linux/ppp_defs.h> 28 #include <linux/ppp-ioctl.h> 29 #include <linux/skbuff.h> 30 #include <linux/proc_fs.h> 31 #include <linux/seq_file.h> 32 #include <linux/poll.h> 33 #include <linux/capi.h> 34 #include <linux/kernelcapi.h> 35 #include <linux/init.h> 36 #include <linux/device.h> 37 #include <linux/moduleparam.h> 38 #include <linux/isdn/capiutil.h> 39 #include <linux/isdn/capicmd.h> 40 41 MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface"); 42 MODULE_AUTHOR("Carsten Paeth"); 43 MODULE_LICENSE("GPL"); 44 45 /* -------- driver information -------------------------------------- */ 46 47 static DEFINE_MUTEX(capi_mutex); 48 static struct class *capi_class; 49 static int capi_major = 68; /* allocated */ 50 51 module_param_named(major, capi_major, uint, 0); 52 53 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 54 #define CAPINC_NR_PORTS 32 55 #define CAPINC_MAX_PORTS 256 56 57 static int capi_ttyminors = CAPINC_NR_PORTS; 58 59 module_param_named(ttyminors, capi_ttyminors, uint, 0); 60 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 61 62 /* -------- defines ------------------------------------------------- */ 63 64 #define CAPINC_MAX_RECVQUEUE 10 65 #define CAPINC_MAX_SENDQUEUE 10 66 #define CAPI_MAX_BLKSIZE 2048 67 68 /* -------- data structures ----------------------------------------- */ 69 70 struct capidev; 71 struct capincci; 72 struct capiminor; 73 74 struct ackqueue_entry { 75 struct list_head list; 76 u16 datahandle; 77 }; 78 79 struct capiminor { 80 struct kref kref; 81 82 unsigned int minor; 83 84 struct capi20_appl *ap; 85 u32 ncci; 86 atomic_t datahandle; 87 atomic_t msgid; 88 89 struct tty_port port; 90 int ttyinstop; 91 int ttyoutstop; 92 93 struct sk_buff_head inqueue; 94 95 struct sk_buff_head outqueue; 96 int outbytes; 97 struct sk_buff *outskb; 98 spinlock_t outlock; 99 100 /* transmit path */ 101 struct list_head ackqueue; 102 int nack; 103 spinlock_t ackqlock; 104 }; 105 106 struct capincci { 107 struct list_head list; 108 u32 ncci; 109 struct capidev *cdev; 110 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 111 struct capiminor *minorp; 112 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 113 }; 114 115 struct capidev { 116 struct list_head list; 117 struct capi20_appl ap; 118 u16 errcode; 119 unsigned userflags; 120 121 struct sk_buff_head recvqueue; 122 wait_queue_head_t recvwait; 123 124 struct list_head nccis; 125 126 struct mutex lock; 127 }; 128 129 /* -------- global variables ---------------------------------------- */ 130 131 static DEFINE_MUTEX(capidev_list_lock); 132 static LIST_HEAD(capidev_list); 133 134 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 135 136 static DEFINE_SPINLOCK(capiminors_lock); 137 static struct capiminor **capiminors; 138 139 static struct tty_driver *capinc_tty_driver; 140 141 /* -------- datahandles --------------------------------------------- */ 142 143 static int capiminor_add_ack(struct capiminor *mp, u16 datahandle) 144 { 145 struct ackqueue_entry *n; 146 147 n = kmalloc(sizeof(*n), GFP_ATOMIC); 148 if (unlikely(!n)) { 149 printk(KERN_ERR "capi: alloc datahandle failed\n"); 150 return -1; 151 } 152 n->datahandle = datahandle; 153 INIT_LIST_HEAD(&n->list); 154 spin_lock_bh(&mp->ackqlock); 155 list_add_tail(&n->list, &mp->ackqueue); 156 mp->nack++; 157 spin_unlock_bh(&mp->ackqlock); 158 return 0; 159 } 160 161 static int capiminor_del_ack(struct capiminor *mp, u16 datahandle) 162 { 163 struct ackqueue_entry *p, *tmp; 164 165 spin_lock_bh(&mp->ackqlock); 166 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { 167 if (p->datahandle == datahandle) { 168 list_del(&p->list); 169 mp->nack--; 170 spin_unlock_bh(&mp->ackqlock); 171 kfree(p); 172 return 0; 173 } 174 } 175 spin_unlock_bh(&mp->ackqlock); 176 return -1; 177 } 178 179 static void capiminor_del_all_ack(struct capiminor *mp) 180 { 181 struct ackqueue_entry *p, *tmp; 182 183 list_for_each_entry_safe(p, tmp, &mp->ackqueue, list) { 184 list_del(&p->list); 185 kfree(p); 186 mp->nack--; 187 } 188 } 189 190 191 /* -------- struct capiminor ---------------------------------------- */ 192 193 static const struct tty_port_operations capiminor_port_ops; /* we have none */ 194 195 static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) 196 { 197 struct capiminor *mp; 198 struct device *dev; 199 unsigned int minor; 200 201 mp = kzalloc(sizeof(*mp), GFP_KERNEL); 202 if (!mp) { 203 printk(KERN_ERR "capi: can't alloc capiminor\n"); 204 return NULL; 205 } 206 207 kref_init(&mp->kref); 208 209 mp->ap = ap; 210 mp->ncci = ncci; 211 INIT_LIST_HEAD(&mp->ackqueue); 212 spin_lock_init(&mp->ackqlock); 213 214 skb_queue_head_init(&mp->inqueue); 215 skb_queue_head_init(&mp->outqueue); 216 spin_lock_init(&mp->outlock); 217 218 tty_port_init(&mp->port); 219 mp->port.ops = &capiminor_port_ops; 220 221 /* Allocate the least unused minor number. */ 222 spin_lock(&capiminors_lock); 223 for (minor = 0; minor < capi_ttyminors; minor++) 224 if (!capiminors[minor]) { 225 capiminors[minor] = mp; 226 break; 227 } 228 spin_unlock(&capiminors_lock); 229 230 if (minor == capi_ttyminors) { 231 printk(KERN_NOTICE "capi: out of minors\n"); 232 goto err_out1; 233 } 234 235 mp->minor = minor; 236 237 dev = tty_port_register_device(&mp->port, capinc_tty_driver, minor, 238 NULL); 239 if (IS_ERR(dev)) 240 goto err_out2; 241 242 return mp; 243 244 err_out2: 245 spin_lock(&capiminors_lock); 246 capiminors[minor] = NULL; 247 spin_unlock(&capiminors_lock); 248 249 err_out1: 250 kfree(mp); 251 return NULL; 252 } 253 254 static void capiminor_destroy(struct kref *kref) 255 { 256 struct capiminor *mp = container_of(kref, struct capiminor, kref); 257 258 kfree_skb(mp->outskb); 259 skb_queue_purge(&mp->inqueue); 260 skb_queue_purge(&mp->outqueue); 261 capiminor_del_all_ack(mp); 262 kfree(mp); 263 } 264 265 static struct capiminor *capiminor_get(unsigned int minor) 266 { 267 struct capiminor *mp; 268 269 spin_lock(&capiminors_lock); 270 mp = capiminors[minor]; 271 if (mp) 272 kref_get(&mp->kref); 273 spin_unlock(&capiminors_lock); 274 275 return mp; 276 } 277 278 static inline void capiminor_put(struct capiminor *mp) 279 { 280 kref_put(&mp->kref, capiminor_destroy); 281 } 282 283 static void capiminor_free(struct capiminor *mp) 284 { 285 tty_unregister_device(capinc_tty_driver, mp->minor); 286 287 spin_lock(&capiminors_lock); 288 capiminors[mp->minor] = NULL; 289 spin_unlock(&capiminors_lock); 290 291 capiminor_put(mp); 292 } 293 294 /* -------- struct capincci ----------------------------------------- */ 295 296 static void capincci_alloc_minor(struct capidev *cdev, struct capincci *np) 297 { 298 if (cdev->userflags & CAPIFLAG_HIGHJACKING) 299 np->minorp = capiminor_alloc(&cdev->ap, np->ncci); 300 } 301 302 static void capincci_free_minor(struct capincci *np) 303 { 304 struct capiminor *mp = np->minorp; 305 struct tty_struct *tty; 306 307 if (mp) { 308 tty = tty_port_tty_get(&mp->port); 309 if (tty) { 310 tty_vhangup(tty); 311 tty_kref_put(tty); 312 } 313 314 capiminor_free(mp); 315 } 316 } 317 318 static inline unsigned int capincci_minor_opencount(struct capincci *np) 319 { 320 struct capiminor *mp = np->minorp; 321 unsigned int count = 0; 322 struct tty_struct *tty; 323 324 if (mp) { 325 tty = tty_port_tty_get(&mp->port); 326 if (tty) { 327 count = tty->count; 328 tty_kref_put(tty); 329 } 330 } 331 return count; 332 } 333 334 #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ 335 336 static inline void 337 capincci_alloc_minor(struct capidev *cdev, struct capincci *np) { } 338 static inline void capincci_free_minor(struct capincci *np) { } 339 340 #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ 341 342 static struct capincci *capincci_alloc(struct capidev *cdev, u32 ncci) 343 { 344 struct capincci *np; 345 346 np = kzalloc(sizeof(*np), GFP_KERNEL); 347 if (!np) 348 return NULL; 349 np->ncci = ncci; 350 np->cdev = cdev; 351 352 capincci_alloc_minor(cdev, np); 353 354 list_add_tail(&np->list, &cdev->nccis); 355 356 return np; 357 } 358 359 static void capincci_free(struct capidev *cdev, u32 ncci) 360 { 361 struct capincci *np, *tmp; 362 363 list_for_each_entry_safe(np, tmp, &cdev->nccis, list) 364 if (ncci == 0xffffffff || np->ncci == ncci) { 365 capincci_free_minor(np); 366 list_del(&np->list); 367 kfree(np); 368 } 369 } 370 371 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 372 static struct capincci *capincci_find(struct capidev *cdev, u32 ncci) 373 { 374 struct capincci *np; 375 376 list_for_each_entry(np, &cdev->nccis, list) 377 if (np->ncci == ncci) 378 return np; 379 return NULL; 380 } 381 382 /* -------- handle data queue --------------------------------------- */ 383 384 static struct sk_buff * 385 gen_data_b3_resp_for(struct capiminor *mp, struct sk_buff *skb) 386 { 387 struct sk_buff *nskb; 388 nskb = alloc_skb(CAPI_DATA_B3_RESP_LEN, GFP_KERNEL); 389 if (nskb) { 390 u16 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2); 391 unsigned char *s = skb_put(nskb, CAPI_DATA_B3_RESP_LEN); 392 capimsg_setu16(s, 0, CAPI_DATA_B3_RESP_LEN); 393 capimsg_setu16(s, 2, mp->ap->applid); 394 capimsg_setu8 (s, 4, CAPI_DATA_B3); 395 capimsg_setu8 (s, 5, CAPI_RESP); 396 capimsg_setu16(s, 6, atomic_inc_return(&mp->msgid)); 397 capimsg_setu32(s, 8, mp->ncci); 398 capimsg_setu16(s, 12, datahandle); 399 } 400 return nskb; 401 } 402 403 static int handle_recv_skb(struct capiminor *mp, struct sk_buff *skb) 404 { 405 unsigned int datalen = skb->len - CAPIMSG_LEN(skb->data); 406 struct tty_struct *tty; 407 struct sk_buff *nskb; 408 u16 errcode, datahandle; 409 struct tty_ldisc *ld; 410 int ret = -1; 411 412 tty = tty_port_tty_get(&mp->port); 413 if (!tty) { 414 pr_debug("capi: currently no receiver\n"); 415 return -1; 416 } 417 418 ld = tty_ldisc_ref(tty); 419 if (!ld) { 420 /* fatal error, do not requeue */ 421 ret = 0; 422 kfree_skb(skb); 423 goto deref_tty; 424 } 425 426 if (ld->ops->receive_buf == NULL) { 427 pr_debug("capi: ldisc has no receive_buf function\n"); 428 /* fatal error, do not requeue */ 429 goto free_skb; 430 } 431 if (mp->ttyinstop) { 432 pr_debug("capi: recv tty throttled\n"); 433 goto deref_ldisc; 434 } 435 436 if (tty->receive_room < datalen) { 437 pr_debug("capi: no room in tty\n"); 438 goto deref_ldisc; 439 } 440 441 nskb = gen_data_b3_resp_for(mp, skb); 442 if (!nskb) { 443 printk(KERN_ERR "capi: gen_data_b3_resp failed\n"); 444 goto deref_ldisc; 445 } 446 447 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4); 448 449 errcode = capi20_put_message(mp->ap, nskb); 450 451 if (errcode == CAPI_NOERROR) { 452 skb_pull(skb, CAPIMSG_LEN(skb->data)); 453 pr_debug("capi: DATA_B3_RESP %u len=%d => ldisc\n", 454 datahandle, skb->len); 455 ld->ops->receive_buf(tty, skb->data, NULL, skb->len); 456 } else { 457 printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n", 458 errcode); 459 kfree_skb(nskb); 460 461 if (errcode == CAPI_SENDQUEUEFULL) 462 goto deref_ldisc; 463 } 464 465 free_skb: 466 ret = 0; 467 kfree_skb(skb); 468 469 deref_ldisc: 470 tty_ldisc_deref(ld); 471 472 deref_tty: 473 tty_kref_put(tty); 474 return ret; 475 } 476 477 static void handle_minor_recv(struct capiminor *mp) 478 { 479 struct sk_buff *skb; 480 481 while ((skb = skb_dequeue(&mp->inqueue)) != NULL) 482 if (handle_recv_skb(mp, skb) < 0) { 483 skb_queue_head(&mp->inqueue, skb); 484 return; 485 } 486 } 487 488 static void handle_minor_send(struct capiminor *mp) 489 { 490 struct tty_struct *tty; 491 struct sk_buff *skb; 492 u16 len; 493 u16 errcode; 494 u16 datahandle; 495 496 tty = tty_port_tty_get(&mp->port); 497 if (!tty) 498 return; 499 500 if (mp->ttyoutstop) { 501 pr_debug("capi: send: tty stopped\n"); 502 tty_kref_put(tty); 503 return; 504 } 505 506 while (1) { 507 spin_lock_bh(&mp->outlock); 508 skb = __skb_dequeue(&mp->outqueue); 509 if (!skb) { 510 spin_unlock_bh(&mp->outlock); 511 break; 512 } 513 len = (u16)skb->len; 514 mp->outbytes -= len; 515 spin_unlock_bh(&mp->outlock); 516 517 datahandle = atomic_inc_return(&mp->datahandle); 518 skb_push(skb, CAPI_DATA_B3_REQ_LEN); 519 memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); 520 capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN); 521 capimsg_setu16(skb->data, 2, mp->ap->applid); 522 capimsg_setu8 (skb->data, 4, CAPI_DATA_B3); 523 capimsg_setu8 (skb->data, 5, CAPI_REQ); 524 capimsg_setu16(skb->data, 6, atomic_inc_return(&mp->msgid)); 525 capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */ 526 capimsg_setu32(skb->data, 12, (u32)(long)skb->data);/* Data32 */ 527 capimsg_setu16(skb->data, 16, len); /* Data length */ 528 capimsg_setu16(skb->data, 18, datahandle); 529 capimsg_setu16(skb->data, 20, 0); /* Flags */ 530 531 if (capiminor_add_ack(mp, datahandle) < 0) { 532 skb_pull(skb, CAPI_DATA_B3_REQ_LEN); 533 534 spin_lock_bh(&mp->outlock); 535 __skb_queue_head(&mp->outqueue, skb); 536 mp->outbytes += len; 537 spin_unlock_bh(&mp->outlock); 538 539 break; 540 } 541 errcode = capi20_put_message(mp->ap, skb); 542 if (errcode == CAPI_NOERROR) { 543 pr_debug("capi: DATA_B3_REQ %u len=%u\n", 544 datahandle, len); 545 continue; 546 } 547 capiminor_del_ack(mp, datahandle); 548 549 if (errcode == CAPI_SENDQUEUEFULL) { 550 skb_pull(skb, CAPI_DATA_B3_REQ_LEN); 551 552 spin_lock_bh(&mp->outlock); 553 __skb_queue_head(&mp->outqueue, skb); 554 mp->outbytes += len; 555 spin_unlock_bh(&mp->outlock); 556 557 break; 558 } 559 560 /* ups, drop packet */ 561 printk(KERN_ERR "capi: put_message = %x\n", errcode); 562 kfree_skb(skb); 563 } 564 tty_kref_put(tty); 565 } 566 567 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 568 /* -------- function called by lower level -------------------------- */ 569 570 static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) 571 { 572 struct capidev *cdev = ap->private; 573 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 574 struct tty_struct *tty; 575 struct capiminor *mp; 576 u16 datahandle; 577 struct capincci *np; 578 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 579 580 mutex_lock(&cdev->lock); 581 582 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { 583 u16 info = CAPIMSG_U16(skb->data, 12); // Info field 584 if ((info & 0xff00) == 0) 585 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); 586 } 587 if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) 588 capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); 589 590 if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { 591 skb_queue_tail(&cdev->recvqueue, skb); 592 wake_up_interruptible(&cdev->recvwait); 593 goto unlock_out; 594 } 595 596 #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE 597 skb_queue_tail(&cdev->recvqueue, skb); 598 wake_up_interruptible(&cdev->recvwait); 599 600 #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 601 602 np = capincci_find(cdev, CAPIMSG_CONTROL(skb->data)); 603 if (!np) { 604 printk(KERN_ERR "BUG: capi_signal: ncci not found\n"); 605 skb_queue_tail(&cdev->recvqueue, skb); 606 wake_up_interruptible(&cdev->recvwait); 607 goto unlock_out; 608 } 609 610 mp = np->minorp; 611 if (!mp) { 612 skb_queue_tail(&cdev->recvqueue, skb); 613 wake_up_interruptible(&cdev->recvwait); 614 goto unlock_out; 615 } 616 if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) { 617 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 4 + 2); 618 pr_debug("capi_signal: DATA_B3_IND %u len=%d\n", 619 datahandle, skb->len-CAPIMSG_LEN(skb->data)); 620 skb_queue_tail(&mp->inqueue, skb); 621 622 handle_minor_recv(mp); 623 624 } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) { 625 626 datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4); 627 pr_debug("capi_signal: DATA_B3_CONF %u 0x%x\n", 628 datahandle, 629 CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 2)); 630 kfree_skb(skb); 631 capiminor_del_ack(mp, datahandle); 632 tty = tty_port_tty_get(&mp->port); 633 if (tty) { 634 tty_wakeup(tty); 635 tty_kref_put(tty); 636 } 637 handle_minor_send(mp); 638 639 } else { 640 /* ups, let capi application handle it :-) */ 641 skb_queue_tail(&cdev->recvqueue, skb); 642 wake_up_interruptible(&cdev->recvwait); 643 } 644 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 645 646 unlock_out: 647 mutex_unlock(&cdev->lock); 648 } 649 650 /* -------- file_operations for capidev ----------------------------- */ 651 652 static ssize_t 653 capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) 654 { 655 struct capidev *cdev = file->private_data; 656 struct sk_buff *skb; 657 size_t copied; 658 int err; 659 660 if (!cdev->ap.applid) 661 return -ENODEV; 662 663 skb = skb_dequeue(&cdev->recvqueue); 664 if (!skb) { 665 if (file->f_flags & O_NONBLOCK) 666 return -EAGAIN; 667 err = wait_event_interruptible(cdev->recvwait, 668 (skb = skb_dequeue(&cdev->recvqueue))); 669 if (err) 670 return err; 671 } 672 if (skb->len > count) { 673 skb_queue_head(&cdev->recvqueue, skb); 674 return -EMSGSIZE; 675 } 676 if (copy_to_user(buf, skb->data, skb->len)) { 677 skb_queue_head(&cdev->recvqueue, skb); 678 return -EFAULT; 679 } 680 copied = skb->len; 681 682 kfree_skb(skb); 683 684 return copied; 685 } 686 687 static ssize_t 688 capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) 689 { 690 struct capidev *cdev = file->private_data; 691 struct sk_buff *skb; 692 u16 mlen; 693 694 if (!cdev->ap.applid) 695 return -ENODEV; 696 697 skb = alloc_skb(count, GFP_USER); 698 if (!skb) 699 return -ENOMEM; 700 701 if (copy_from_user(skb_put(skb, count), buf, count)) { 702 kfree_skb(skb); 703 return -EFAULT; 704 } 705 mlen = CAPIMSG_LEN(skb->data); 706 if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) { 707 if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) { 708 kfree_skb(skb); 709 return -EINVAL; 710 } 711 } else { 712 if (mlen != count) { 713 kfree_skb(skb); 714 return -EINVAL; 715 } 716 } 717 CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); 718 719 if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { 720 mutex_lock(&cdev->lock); 721 capincci_free(cdev, CAPIMSG_NCCI(skb->data)); 722 mutex_unlock(&cdev->lock); 723 } 724 725 cdev->errcode = capi20_put_message(&cdev->ap, skb); 726 727 if (cdev->errcode) { 728 kfree_skb(skb); 729 return -EIO; 730 } 731 return count; 732 } 733 734 static unsigned int 735 capi_poll(struct file *file, poll_table *wait) 736 { 737 struct capidev *cdev = file->private_data; 738 unsigned int mask = 0; 739 740 if (!cdev->ap.applid) 741 return POLLERR; 742 743 poll_wait(file, &(cdev->recvwait), wait); 744 mask = POLLOUT | POLLWRNORM; 745 if (!skb_queue_empty(&cdev->recvqueue)) 746 mask |= POLLIN | POLLRDNORM; 747 return mask; 748 } 749 750 static int 751 capi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 752 { 753 struct capidev *cdev = file->private_data; 754 capi_ioctl_struct data; 755 int retval = -EINVAL; 756 void __user *argp = (void __user *)arg; 757 758 switch (cmd) { 759 case CAPI_REGISTER: 760 mutex_lock(&cdev->lock); 761 762 if (cdev->ap.applid) { 763 retval = -EEXIST; 764 goto register_out; 765 } 766 if (copy_from_user(&cdev->ap.rparam, argp, 767 sizeof(struct capi_register_params))) { 768 retval = -EFAULT; 769 goto register_out; 770 } 771 cdev->ap.private = cdev; 772 cdev->ap.recv_message = capi_recv_message; 773 cdev->errcode = capi20_register(&cdev->ap); 774 retval = (int)cdev->ap.applid; 775 if (cdev->errcode) { 776 cdev->ap.applid = 0; 777 retval = -EIO; 778 } 779 780 register_out: 781 mutex_unlock(&cdev->lock); 782 return retval; 783 784 case CAPI_GET_VERSION: 785 if (copy_from_user(&data.contr, argp, 786 sizeof(data.contr))) 787 return -EFAULT; 788 cdev->errcode = capi20_get_version(data.contr, &data.version); 789 if (cdev->errcode) 790 return -EIO; 791 if (copy_to_user(argp, &data.version, 792 sizeof(data.version))) 793 return -EFAULT; 794 return 0; 795 796 case CAPI_GET_SERIAL: 797 if (copy_from_user(&data.contr, argp, 798 sizeof(data.contr))) 799 return -EFAULT; 800 cdev->errcode = capi20_get_serial(data.contr, data.serial); 801 if (cdev->errcode) 802 return -EIO; 803 if (copy_to_user(argp, data.serial, 804 sizeof(data.serial))) 805 return -EFAULT; 806 return 0; 807 808 case CAPI_GET_PROFILE: 809 if (copy_from_user(&data.contr, argp, 810 sizeof(data.contr))) 811 return -EFAULT; 812 813 if (data.contr == 0) { 814 cdev->errcode = capi20_get_profile(data.contr, &data.profile); 815 if (cdev->errcode) 816 return -EIO; 817 818 retval = copy_to_user(argp, 819 &data.profile.ncontroller, 820 sizeof(data.profile.ncontroller)); 821 822 } else { 823 cdev->errcode = capi20_get_profile(data.contr, &data.profile); 824 if (cdev->errcode) 825 return -EIO; 826 827 retval = copy_to_user(argp, &data.profile, 828 sizeof(data.profile)); 829 } 830 if (retval) 831 return -EFAULT; 832 return 0; 833 834 case CAPI_GET_MANUFACTURER: 835 if (copy_from_user(&data.contr, argp, 836 sizeof(data.contr))) 837 return -EFAULT; 838 cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer); 839 if (cdev->errcode) 840 return -EIO; 841 842 if (copy_to_user(argp, data.manufacturer, 843 sizeof(data.manufacturer))) 844 return -EFAULT; 845 846 return 0; 847 848 case CAPI_GET_ERRCODE: 849 data.errcode = cdev->errcode; 850 cdev->errcode = CAPI_NOERROR; 851 if (arg) { 852 if (copy_to_user(argp, &data.errcode, 853 sizeof(data.errcode))) 854 return -EFAULT; 855 } 856 return data.errcode; 857 858 case CAPI_INSTALLED: 859 if (capi20_isinstalled() == CAPI_NOERROR) 860 return 0; 861 return -ENXIO; 862 863 case CAPI_MANUFACTURER_CMD: { 864 struct capi_manufacturer_cmd mcmd; 865 if (!capable(CAP_SYS_ADMIN)) 866 return -EPERM; 867 if (copy_from_user(&mcmd, argp, sizeof(mcmd))) 868 return -EFAULT; 869 return capi20_manufacturer(mcmd.cmd, mcmd.data); 870 } 871 case CAPI_SET_FLAGS: 872 case CAPI_CLR_FLAGS: { 873 unsigned userflags; 874 875 if (copy_from_user(&userflags, argp, sizeof(userflags))) 876 return -EFAULT; 877 878 mutex_lock(&cdev->lock); 879 if (cmd == CAPI_SET_FLAGS) 880 cdev->userflags |= userflags; 881 else 882 cdev->userflags &= ~userflags; 883 mutex_unlock(&cdev->lock); 884 return 0; 885 } 886 case CAPI_GET_FLAGS: 887 if (copy_to_user(argp, &cdev->userflags, 888 sizeof(cdev->userflags))) 889 return -EFAULT; 890 return 0; 891 892 #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE 893 case CAPI_NCCI_OPENCOUNT: 894 return 0; 895 896 #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 897 case CAPI_NCCI_OPENCOUNT: { 898 struct capincci *nccip; 899 unsigned ncci; 900 int count = 0; 901 902 if (copy_from_user(&ncci, argp, sizeof(ncci))) 903 return -EFAULT; 904 905 mutex_lock(&cdev->lock); 906 nccip = capincci_find(cdev, (u32)ncci); 907 if (nccip) 908 count = capincci_minor_opencount(nccip); 909 mutex_unlock(&cdev->lock); 910 return count; 911 } 912 913 case CAPI_NCCI_GETUNIT: { 914 struct capincci *nccip; 915 struct capiminor *mp; 916 unsigned ncci; 917 int unit = -ESRCH; 918 919 if (copy_from_user(&ncci, argp, sizeof(ncci))) 920 return -EFAULT; 921 922 mutex_lock(&cdev->lock); 923 nccip = capincci_find(cdev, (u32)ncci); 924 if (nccip) { 925 mp = nccip->minorp; 926 if (mp) 927 unit = mp->minor; 928 } 929 mutex_unlock(&cdev->lock); 930 return unit; 931 } 932 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ 933 934 default: 935 return -EINVAL; 936 } 937 } 938 939 static long 940 capi_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 941 { 942 int ret; 943 944 mutex_lock(&capi_mutex); 945 ret = capi_ioctl(file, cmd, arg); 946 mutex_unlock(&capi_mutex); 947 948 return ret; 949 } 950 951 static int capi_open(struct inode *inode, struct file *file) 952 { 953 struct capidev *cdev; 954 955 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); 956 if (!cdev) 957 return -ENOMEM; 958 959 mutex_init(&cdev->lock); 960 skb_queue_head_init(&cdev->recvqueue); 961 init_waitqueue_head(&cdev->recvwait); 962 INIT_LIST_HEAD(&cdev->nccis); 963 file->private_data = cdev; 964 965 mutex_lock(&capidev_list_lock); 966 list_add_tail(&cdev->list, &capidev_list); 967 mutex_unlock(&capidev_list_lock); 968 969 return nonseekable_open(inode, file); 970 } 971 972 static int capi_release(struct inode *inode, struct file *file) 973 { 974 struct capidev *cdev = file->private_data; 975 976 mutex_lock(&capidev_list_lock); 977 list_del(&cdev->list); 978 mutex_unlock(&capidev_list_lock); 979 980 if (cdev->ap.applid) 981 capi20_release(&cdev->ap); 982 skb_queue_purge(&cdev->recvqueue); 983 capincci_free(cdev, 0xffffffff); 984 985 kfree(cdev); 986 return 0; 987 } 988 989 static const struct file_operations capi_fops = 990 { 991 .owner = THIS_MODULE, 992 .llseek = no_llseek, 993 .read = capi_read, 994 .write = capi_write, 995 .poll = capi_poll, 996 .unlocked_ioctl = capi_unlocked_ioctl, 997 .open = capi_open, 998 .release = capi_release, 999 }; 1000 1001 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 1002 /* -------- tty_operations for capincci ----------------------------- */ 1003 1004 static int 1005 capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty) 1006 { 1007 struct capiminor *mp = capiminor_get(tty->index); 1008 int ret = tty_standard_install(driver, tty); 1009 1010 if (ret == 0) 1011 tty->driver_data = mp; 1012 else 1013 capiminor_put(mp); 1014 return ret; 1015 } 1016 1017 static void capinc_tty_cleanup(struct tty_struct *tty) 1018 { 1019 struct capiminor *mp = tty->driver_data; 1020 tty->driver_data = NULL; 1021 capiminor_put(mp); 1022 } 1023 1024 static int capinc_tty_open(struct tty_struct *tty, struct file *filp) 1025 { 1026 struct capiminor *mp = tty->driver_data; 1027 int err; 1028 1029 err = tty_port_open(&mp->port, tty, filp); 1030 if (err) 1031 return err; 1032 1033 handle_minor_recv(mp); 1034 return 0; 1035 } 1036 1037 static void capinc_tty_close(struct tty_struct *tty, struct file *filp) 1038 { 1039 struct capiminor *mp = tty->driver_data; 1040 1041 tty_port_close(&mp->port, tty, filp); 1042 } 1043 1044 static int capinc_tty_write(struct tty_struct *tty, 1045 const unsigned char *buf, int count) 1046 { 1047 struct capiminor *mp = tty->driver_data; 1048 struct sk_buff *skb; 1049 1050 pr_debug("capinc_tty_write(count=%d)\n", count); 1051 1052 spin_lock_bh(&mp->outlock); 1053 skb = mp->outskb; 1054 if (skb) { 1055 mp->outskb = NULL; 1056 __skb_queue_tail(&mp->outqueue, skb); 1057 mp->outbytes += skb->len; 1058 } 1059 1060 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + count, GFP_ATOMIC); 1061 if (!skb) { 1062 printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n"); 1063 spin_unlock_bh(&mp->outlock); 1064 return -ENOMEM; 1065 } 1066 1067 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); 1068 memcpy(skb_put(skb, count), buf, count); 1069 1070 __skb_queue_tail(&mp->outqueue, skb); 1071 mp->outbytes += skb->len; 1072 spin_unlock_bh(&mp->outlock); 1073 1074 handle_minor_send(mp); 1075 1076 return count; 1077 } 1078 1079 static int capinc_tty_put_char(struct tty_struct *tty, unsigned char ch) 1080 { 1081 struct capiminor *mp = tty->driver_data; 1082 bool invoke_send = false; 1083 struct sk_buff *skb; 1084 int ret = 1; 1085 1086 pr_debug("capinc_put_char(%u)\n", ch); 1087 1088 spin_lock_bh(&mp->outlock); 1089 skb = mp->outskb; 1090 if (skb) { 1091 if (skb_tailroom(skb) > 0) { 1092 *(skb_put(skb, 1)) = ch; 1093 goto unlock_out; 1094 } 1095 mp->outskb = NULL; 1096 __skb_queue_tail(&mp->outqueue, skb); 1097 mp->outbytes += skb->len; 1098 invoke_send = true; 1099 } 1100 1101 skb = alloc_skb(CAPI_DATA_B3_REQ_LEN + CAPI_MAX_BLKSIZE, GFP_ATOMIC); 1102 if (skb) { 1103 skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); 1104 *(skb_put(skb, 1)) = ch; 1105 mp->outskb = skb; 1106 } else { 1107 printk(KERN_ERR "capinc_put_char: char %u lost\n", ch); 1108 ret = 0; 1109 } 1110 1111 unlock_out: 1112 spin_unlock_bh(&mp->outlock); 1113 1114 if (invoke_send) 1115 handle_minor_send(mp); 1116 1117 return ret; 1118 } 1119 1120 static void capinc_tty_flush_chars(struct tty_struct *tty) 1121 { 1122 struct capiminor *mp = tty->driver_data; 1123 struct sk_buff *skb; 1124 1125 pr_debug("capinc_tty_flush_chars\n"); 1126 1127 spin_lock_bh(&mp->outlock); 1128 skb = mp->outskb; 1129 if (skb) { 1130 mp->outskb = NULL; 1131 __skb_queue_tail(&mp->outqueue, skb); 1132 mp->outbytes += skb->len; 1133 spin_unlock_bh(&mp->outlock); 1134 1135 handle_minor_send(mp); 1136 } else 1137 spin_unlock_bh(&mp->outlock); 1138 1139 handle_minor_recv(mp); 1140 } 1141 1142 static int capinc_tty_write_room(struct tty_struct *tty) 1143 { 1144 struct capiminor *mp = tty->driver_data; 1145 int room; 1146 1147 room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue); 1148 room *= CAPI_MAX_BLKSIZE; 1149 pr_debug("capinc_tty_write_room = %d\n", room); 1150 return room; 1151 } 1152 1153 static int capinc_tty_chars_in_buffer(struct tty_struct *tty) 1154 { 1155 struct capiminor *mp = tty->driver_data; 1156 1157 pr_debug("capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n", 1158 mp->outbytes, mp->nack, 1159 skb_queue_len(&mp->outqueue), 1160 skb_queue_len(&mp->inqueue)); 1161 return mp->outbytes; 1162 } 1163 1164 static int capinc_tty_ioctl(struct tty_struct *tty, 1165 unsigned int cmd, unsigned long arg) 1166 { 1167 return -ENOIOCTLCMD; 1168 } 1169 1170 static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios *old) 1171 { 1172 pr_debug("capinc_tty_set_termios\n"); 1173 } 1174 1175 static void capinc_tty_throttle(struct tty_struct *tty) 1176 { 1177 struct capiminor *mp = tty->driver_data; 1178 pr_debug("capinc_tty_throttle\n"); 1179 mp->ttyinstop = 1; 1180 } 1181 1182 static void capinc_tty_unthrottle(struct tty_struct *tty) 1183 { 1184 struct capiminor *mp = tty->driver_data; 1185 1186 pr_debug("capinc_tty_unthrottle\n"); 1187 mp->ttyinstop = 0; 1188 handle_minor_recv(mp); 1189 } 1190 1191 static void capinc_tty_stop(struct tty_struct *tty) 1192 { 1193 struct capiminor *mp = tty->driver_data; 1194 1195 pr_debug("capinc_tty_stop\n"); 1196 mp->ttyoutstop = 1; 1197 } 1198 1199 static void capinc_tty_start(struct tty_struct *tty) 1200 { 1201 struct capiminor *mp = tty->driver_data; 1202 1203 pr_debug("capinc_tty_start\n"); 1204 mp->ttyoutstop = 0; 1205 handle_minor_send(mp); 1206 } 1207 1208 static void capinc_tty_hangup(struct tty_struct *tty) 1209 { 1210 struct capiminor *mp = tty->driver_data; 1211 1212 pr_debug("capinc_tty_hangup\n"); 1213 tty_port_hangup(&mp->port); 1214 } 1215 1216 static int capinc_tty_break_ctl(struct tty_struct *tty, int state) 1217 { 1218 pr_debug("capinc_tty_break_ctl(%d)\n", state); 1219 return 0; 1220 } 1221 1222 static void capinc_tty_flush_buffer(struct tty_struct *tty) 1223 { 1224 pr_debug("capinc_tty_flush_buffer\n"); 1225 } 1226 1227 static void capinc_tty_set_ldisc(struct tty_struct *tty) 1228 { 1229 pr_debug("capinc_tty_set_ldisc\n"); 1230 } 1231 1232 static void capinc_tty_send_xchar(struct tty_struct *tty, char ch) 1233 { 1234 pr_debug("capinc_tty_send_xchar(%d)\n", ch); 1235 } 1236 1237 static const struct tty_operations capinc_ops = { 1238 .open = capinc_tty_open, 1239 .close = capinc_tty_close, 1240 .write = capinc_tty_write, 1241 .put_char = capinc_tty_put_char, 1242 .flush_chars = capinc_tty_flush_chars, 1243 .write_room = capinc_tty_write_room, 1244 .chars_in_buffer = capinc_tty_chars_in_buffer, 1245 .ioctl = capinc_tty_ioctl, 1246 .set_termios = capinc_tty_set_termios, 1247 .throttle = capinc_tty_throttle, 1248 .unthrottle = capinc_tty_unthrottle, 1249 .stop = capinc_tty_stop, 1250 .start = capinc_tty_start, 1251 .hangup = capinc_tty_hangup, 1252 .break_ctl = capinc_tty_break_ctl, 1253 .flush_buffer = capinc_tty_flush_buffer, 1254 .set_ldisc = capinc_tty_set_ldisc, 1255 .send_xchar = capinc_tty_send_xchar, 1256 .install = capinc_tty_install, 1257 .cleanup = capinc_tty_cleanup, 1258 }; 1259 1260 static int __init capinc_tty_init(void) 1261 { 1262 struct tty_driver *drv; 1263 int err; 1264 1265 if (capi_ttyminors > CAPINC_MAX_PORTS) 1266 capi_ttyminors = CAPINC_MAX_PORTS; 1267 if (capi_ttyminors <= 0) 1268 capi_ttyminors = CAPINC_NR_PORTS; 1269 1270 capiminors = kzalloc(sizeof(struct capi_minor *) * capi_ttyminors, 1271 GFP_KERNEL); 1272 if (!capiminors) 1273 return -ENOMEM; 1274 1275 drv = alloc_tty_driver(capi_ttyminors); 1276 if (!drv) { 1277 kfree(capiminors); 1278 return -ENOMEM; 1279 } 1280 drv->driver_name = "capi_nc"; 1281 drv->name = "capi"; 1282 drv->major = 0; 1283 drv->minor_start = 0; 1284 drv->type = TTY_DRIVER_TYPE_SERIAL; 1285 drv->subtype = SERIAL_TYPE_NORMAL; 1286 drv->init_termios = tty_std_termios; 1287 drv->init_termios.c_iflag = ICRNL; 1288 drv->init_termios.c_oflag = OPOST | ONLCR; 1289 drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; 1290 drv->init_termios.c_lflag = 0; 1291 drv->flags = 1292 TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS | 1293 TTY_DRIVER_DYNAMIC_DEV; 1294 tty_set_operations(drv, &capinc_ops); 1295 1296 err = tty_register_driver(drv); 1297 if (err) { 1298 put_tty_driver(drv); 1299 kfree(capiminors); 1300 printk(KERN_ERR "Couldn't register capi_nc driver\n"); 1301 return err; 1302 } 1303 capinc_tty_driver = drv; 1304 return 0; 1305 } 1306 1307 static void __exit capinc_tty_exit(void) 1308 { 1309 tty_unregister_driver(capinc_tty_driver); 1310 put_tty_driver(capinc_tty_driver); 1311 kfree(capiminors); 1312 } 1313 1314 #else /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ 1315 1316 static inline int capinc_tty_init(void) 1317 { 1318 return 0; 1319 } 1320 1321 static inline void capinc_tty_exit(void) { } 1322 1323 #endif /* !CONFIG_ISDN_CAPI_MIDDLEWARE */ 1324 1325 /* -------- /proc functions ----------------------------------------- */ 1326 1327 /* 1328 * /proc/capi/capi20: 1329 * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt 1330 */ 1331 static int capi20_proc_show(struct seq_file *m, void *v) 1332 { 1333 struct capidev *cdev; 1334 struct list_head *l; 1335 1336 mutex_lock(&capidev_list_lock); 1337 list_for_each(l, &capidev_list) { 1338 cdev = list_entry(l, struct capidev, list); 1339 seq_printf(m, "0 %d %lu %lu %lu %lu\n", 1340 cdev->ap.applid, 1341 cdev->ap.nrecvctlpkt, 1342 cdev->ap.nrecvdatapkt, 1343 cdev->ap.nsentctlpkt, 1344 cdev->ap.nsentdatapkt); 1345 } 1346 mutex_unlock(&capidev_list_lock); 1347 return 0; 1348 } 1349 1350 static int capi20_proc_open(struct inode *inode, struct file *file) 1351 { 1352 return single_open(file, capi20_proc_show, NULL); 1353 } 1354 1355 static const struct file_operations capi20_proc_fops = { 1356 .owner = THIS_MODULE, 1357 .open = capi20_proc_open, 1358 .read = seq_read, 1359 .llseek = seq_lseek, 1360 .release = single_release, 1361 }; 1362 1363 /* 1364 * /proc/capi/capi20ncci: 1365 * applid ncci 1366 */ 1367 static int capi20ncci_proc_show(struct seq_file *m, void *v) 1368 { 1369 struct capidev *cdev; 1370 struct capincci *np; 1371 1372 mutex_lock(&capidev_list_lock); 1373 list_for_each_entry(cdev, &capidev_list, list) { 1374 mutex_lock(&cdev->lock); 1375 list_for_each_entry(np, &cdev->nccis, list) 1376 seq_printf(m, "%d 0x%x\n", cdev->ap.applid, np->ncci); 1377 mutex_unlock(&cdev->lock); 1378 } 1379 mutex_unlock(&capidev_list_lock); 1380 return 0; 1381 } 1382 1383 static int capi20ncci_proc_open(struct inode *inode, struct file *file) 1384 { 1385 return single_open(file, capi20ncci_proc_show, NULL); 1386 } 1387 1388 static const struct file_operations capi20ncci_proc_fops = { 1389 .owner = THIS_MODULE, 1390 .open = capi20ncci_proc_open, 1391 .read = seq_read, 1392 .llseek = seq_lseek, 1393 .release = single_release, 1394 }; 1395 1396 static void __init proc_init(void) 1397 { 1398 proc_create("capi/capi20", 0, NULL, &capi20_proc_fops); 1399 proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops); 1400 } 1401 1402 static void __exit proc_exit(void) 1403 { 1404 remove_proc_entry("capi/capi20", NULL); 1405 remove_proc_entry("capi/capi20ncci", NULL); 1406 } 1407 1408 /* -------- init function and module interface ---------------------- */ 1409 1410 1411 static int __init capi_init(void) 1412 { 1413 const char *compileinfo; 1414 int major_ret; 1415 1416 major_ret = register_chrdev(capi_major, "capi20", &capi_fops); 1417 if (major_ret < 0) { 1418 printk(KERN_ERR "capi20: unable to get major %d\n", capi_major); 1419 return major_ret; 1420 } 1421 capi_class = class_create(THIS_MODULE, "capi"); 1422 if (IS_ERR(capi_class)) { 1423 unregister_chrdev(capi_major, "capi20"); 1424 return PTR_ERR(capi_class); 1425 } 1426 1427 device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi"); 1428 1429 if (capinc_tty_init() < 0) { 1430 device_destroy(capi_class, MKDEV(capi_major, 0)); 1431 class_destroy(capi_class); 1432 unregister_chrdev(capi_major, "capi20"); 1433 return -ENOMEM; 1434 } 1435 1436 proc_init(); 1437 1438 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE 1439 compileinfo = " (middleware)"; 1440 #else 1441 compileinfo = " (no middleware)"; 1442 #endif 1443 printk(KERN_NOTICE "CAPI 2.0 started up with major %d%s\n", 1444 capi_major, compileinfo); 1445 1446 return 0; 1447 } 1448 1449 static void __exit capi_exit(void) 1450 { 1451 proc_exit(); 1452 1453 device_destroy(capi_class, MKDEV(capi_major, 0)); 1454 class_destroy(capi_class); 1455 unregister_chrdev(capi_major, "capi20"); 1456 1457 capinc_tty_exit(); 1458 } 1459 1460 module_init(capi_init); 1461 module_exit(capi_exit); 1462