Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 61 | static struct class *capi_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
Adrian Bunk | 408b664 | 2005-05-01 08:59:29 -0700 | [diff] [blame] | 63 | static int capi_major = 68; /* allocated */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 65 | #define CAPINC_NR_PORTS 32 |
| 66 | #define CAPINC_MAX_PORTS 256 |
Adrian Bunk | 408b664 | 2005-05-01 08:59:29 -0700 | [diff] [blame] | 67 | static int capi_ttymajor = 191; |
| 68 | static int capi_ttyminors = CAPINC_NR_PORTS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Adrian Bunk | 408b664 | 2005-05-01 08:59:29 -0700 | [diff] [blame] | 271 | static struct capiminor *capiminor_find(unsigned int minor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame^] | 466 | if (mp->tty->receive_room < datalen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) |
| 468 | printk(KERN_DEBUG "capi: no room in tty\n"); |
| 469 | #endif |
| 470 | goto bad; |
| 471 | } |
| 472 | if ((nskb = gen_data_b3_resp_for(mp, skb)) == 0) { |
| 473 | printk(KERN_ERR "capi: gen_data_b3_resp failed\n"); |
| 474 | goto bad; |
| 475 | } |
| 476 | datahandle = CAPIMSG_U16(skb->data,CAPIMSG_BASELEN+4); |
| 477 | errcode = capi20_put_message(mp->ap, nskb); |
| 478 | if (errcode != CAPI_NOERROR) { |
| 479 | printk(KERN_ERR "capi: send DATA_B3_RESP failed=%x\n", |
| 480 | errcode); |
| 481 | kfree_skb(nskb); |
| 482 | goto bad; |
| 483 | } |
| 484 | (void)skb_pull(skb, CAPIMSG_LEN(skb->data)); |
| 485 | #ifdef _DEBUG_DATAFLOW |
| 486 | printk(KERN_DEBUG "capi: DATA_B3_RESP %u len=%d => ldisc\n", |
| 487 | datahandle, skb->len); |
| 488 | #endif |
| 489 | ld->receive_buf(mp->tty, skb->data, NULL, skb->len); |
| 490 | kfree_skb(skb); |
| 491 | tty_ldisc_deref(ld); |
| 492 | return 0; |
| 493 | bad: |
| 494 | tty_ldisc_deref(ld); |
| 495 | return -1; |
| 496 | } |
| 497 | |
| 498 | static void handle_minor_recv(struct capiminor *mp) |
| 499 | { |
| 500 | struct sk_buff *skb; |
| 501 | while ((skb = skb_dequeue(&mp->inqueue)) != 0) { |
| 502 | unsigned int len = skb->len; |
| 503 | mp->inbytes -= len; |
| 504 | if (handle_recv_skb(mp, skb) < 0) { |
| 505 | skb_queue_head(&mp->inqueue, skb); |
| 506 | mp->inbytes += len; |
| 507 | return; |
| 508 | } |
| 509 | } |
| 510 | } |
| 511 | |
| 512 | static int handle_minor_send(struct capiminor *mp) |
| 513 | { |
| 514 | struct sk_buff *skb; |
| 515 | u16 len; |
| 516 | int count = 0; |
| 517 | u16 errcode; |
| 518 | u16 datahandle; |
| 519 | |
| 520 | if (mp->tty && mp->ttyoutstop) { |
| 521 | #if defined(_DEBUG_DATAFLOW) || defined(_DEBUG_TTYFUNCS) |
| 522 | printk(KERN_DEBUG "capi: send: tty stopped\n"); |
| 523 | #endif |
| 524 | return 0; |
| 525 | } |
| 526 | |
| 527 | while ((skb = skb_dequeue(&mp->outqueue)) != 0) { |
| 528 | datahandle = mp->datahandle; |
| 529 | len = (u16)skb->len; |
| 530 | skb_push(skb, CAPI_DATA_B3_REQ_LEN); |
| 531 | memset(skb->data, 0, CAPI_DATA_B3_REQ_LEN); |
| 532 | capimsg_setu16(skb->data, 0, CAPI_DATA_B3_REQ_LEN); |
| 533 | capimsg_setu16(skb->data, 2, mp->ap->applid); |
| 534 | capimsg_setu8 (skb->data, 4, CAPI_DATA_B3); |
| 535 | capimsg_setu8 (skb->data, 5, CAPI_REQ); |
| 536 | capimsg_setu16(skb->data, 6, mp->msgid++); |
| 537 | capimsg_setu32(skb->data, 8, mp->ncci); /* NCCI */ |
| 538 | capimsg_setu32(skb->data, 12, (u32) skb->data); /* Data32 */ |
| 539 | capimsg_setu16(skb->data, 16, len); /* Data length */ |
| 540 | capimsg_setu16(skb->data, 18, datahandle); |
| 541 | capimsg_setu16(skb->data, 20, 0); /* Flags */ |
| 542 | |
| 543 | if (capincci_add_ack(mp, datahandle) < 0) { |
| 544 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); |
| 545 | skb_queue_head(&mp->outqueue, skb); |
| 546 | return count; |
| 547 | } |
| 548 | errcode = capi20_put_message(mp->ap, skb); |
| 549 | if (errcode == CAPI_NOERROR) { |
| 550 | mp->datahandle++; |
| 551 | count++; |
| 552 | mp->outbytes -= len; |
| 553 | #ifdef _DEBUG_DATAFLOW |
| 554 | printk(KERN_DEBUG "capi: DATA_B3_REQ %u len=%u\n", |
| 555 | datahandle, len); |
| 556 | #endif |
| 557 | continue; |
| 558 | } |
| 559 | capiminor_del_ack(mp, datahandle); |
| 560 | |
| 561 | if (errcode == CAPI_SENDQUEUEFULL) { |
| 562 | skb_pull(skb, CAPI_DATA_B3_REQ_LEN); |
| 563 | skb_queue_head(&mp->outqueue, skb); |
| 564 | break; |
| 565 | } |
| 566 | |
| 567 | /* ups, drop packet */ |
| 568 | printk(KERN_ERR "capi: put_message = %x\n", errcode); |
| 569 | mp->outbytes -= len; |
| 570 | kfree_skb(skb); |
| 571 | } |
| 572 | return count; |
| 573 | } |
| 574 | |
| 575 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 576 | /* -------- function called by lower level -------------------------- */ |
| 577 | |
| 578 | static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) |
| 579 | { |
| 580 | struct capidev *cdev = ap->private; |
| 581 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 582 | struct capiminor *mp; |
| 583 | u16 datahandle; |
| 584 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 585 | struct capincci *np; |
| 586 | u32 ncci; |
| 587 | |
| 588 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { |
| 589 | u16 info = CAPIMSG_U16(skb->data, 12); // Info field |
| 590 | if (info == 0) { |
| 591 | down(&cdev->ncci_list_sem); |
| 592 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
| 593 | up(&cdev->ncci_list_sem); |
| 594 | } |
| 595 | } |
| 596 | if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) { |
| 597 | down(&cdev->ncci_list_sem); |
| 598 | capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); |
| 599 | up(&cdev->ncci_list_sem); |
| 600 | } |
| 601 | if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { |
| 602 | skb_queue_tail(&cdev->recvqueue, skb); |
| 603 | wake_up_interruptible(&cdev->recvwait); |
| 604 | return; |
| 605 | } |
| 606 | ncci = CAPIMSG_CONTROL(skb->data); |
| 607 | for (np = cdev->nccis; np && np->ncci != ncci; np = np->next) |
| 608 | ; |
| 609 | if (!np) { |
| 610 | printk(KERN_ERR "BUG: capi_signal: ncci not found\n"); |
| 611 | skb_queue_tail(&cdev->recvqueue, skb); |
| 612 | wake_up_interruptible(&cdev->recvwait); |
| 613 | return; |
| 614 | } |
| 615 | #ifndef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 616 | skb_queue_tail(&cdev->recvqueue, skb); |
| 617 | wake_up_interruptible(&cdev->recvwait); |
| 618 | #else /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 619 | mp = np->minorp; |
| 620 | if (!mp) { |
| 621 | skb_queue_tail(&cdev->recvqueue, skb); |
| 622 | wake_up_interruptible(&cdev->recvwait); |
| 623 | return; |
| 624 | } |
| 625 | |
| 626 | |
| 627 | if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_IND) { |
| 628 | |
| 629 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+4+2); |
| 630 | #ifdef _DEBUG_DATAFLOW |
| 631 | printk(KERN_DEBUG "capi_signal: DATA_B3_IND %u len=%d\n", |
| 632 | datahandle, skb->len-CAPIMSG_LEN(skb->data)); |
| 633 | #endif |
| 634 | skb_queue_tail(&mp->inqueue, skb); |
| 635 | mp->inbytes += skb->len; |
| 636 | handle_minor_recv(mp); |
| 637 | |
| 638 | } else if (CAPIMSG_SUBCOMMAND(skb->data) == CAPI_CONF) { |
| 639 | |
| 640 | datahandle = CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4); |
| 641 | #ifdef _DEBUG_DATAFLOW |
| 642 | printk(KERN_DEBUG "capi_signal: DATA_B3_CONF %u 0x%x\n", |
| 643 | datahandle, |
| 644 | CAPIMSG_U16(skb->data, CAPIMSG_BASELEN+4+2)); |
| 645 | #endif |
| 646 | kfree_skb(skb); |
| 647 | (void)capiminor_del_ack(mp, datahandle); |
| 648 | if (mp->tty) |
| 649 | tty_wakeup(mp->tty); |
| 650 | (void)handle_minor_send(mp); |
| 651 | |
| 652 | } else { |
| 653 | /* ups, let capi application handle it :-) */ |
| 654 | skb_queue_tail(&cdev->recvqueue, skb); |
| 655 | wake_up_interruptible(&cdev->recvwait); |
| 656 | } |
| 657 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 658 | } |
| 659 | |
| 660 | /* -------- file_operations for capidev ----------------------------- */ |
| 661 | |
| 662 | static ssize_t |
| 663 | capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) |
| 664 | { |
| 665 | struct capidev *cdev = (struct capidev *)file->private_data; |
| 666 | struct sk_buff *skb; |
| 667 | size_t copied; |
| 668 | |
| 669 | if (!cdev->ap.applid) |
| 670 | return -ENODEV; |
| 671 | |
| 672 | if ((skb = skb_dequeue(&cdev->recvqueue)) == 0) { |
| 673 | |
| 674 | if (file->f_flags & O_NONBLOCK) |
| 675 | return -EAGAIN; |
| 676 | |
| 677 | for (;;) { |
| 678 | interruptible_sleep_on(&cdev->recvwait); |
| 679 | if ((skb = skb_dequeue(&cdev->recvqueue)) != 0) |
| 680 | break; |
| 681 | if (signal_pending(current)) |
| 682 | break; |
| 683 | } |
| 684 | if (skb == 0) |
| 685 | return -ERESTARTNOHAND; |
| 686 | } |
| 687 | if (skb->len > count) { |
| 688 | skb_queue_head(&cdev->recvqueue, skb); |
| 689 | return -EMSGSIZE; |
| 690 | } |
| 691 | if (copy_to_user(buf, skb->data, skb->len)) { |
| 692 | skb_queue_head(&cdev->recvqueue, skb); |
| 693 | return -EFAULT; |
| 694 | } |
| 695 | copied = skb->len; |
| 696 | |
| 697 | kfree_skb(skb); |
| 698 | |
| 699 | return copied; |
| 700 | } |
| 701 | |
| 702 | static ssize_t |
| 703 | capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) |
| 704 | { |
| 705 | struct capidev *cdev = (struct capidev *)file->private_data; |
| 706 | struct sk_buff *skb; |
| 707 | u16 mlen; |
| 708 | |
| 709 | if (!cdev->ap.applid) |
| 710 | return -ENODEV; |
| 711 | |
| 712 | skb = alloc_skb(count, GFP_USER); |
| 713 | if (!skb) |
| 714 | return -ENOMEM; |
| 715 | |
| 716 | if (copy_from_user(skb_put(skb, count), buf, count)) { |
| 717 | kfree_skb(skb); |
| 718 | return -EFAULT; |
| 719 | } |
| 720 | mlen = CAPIMSG_LEN(skb->data); |
| 721 | if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) { |
| 722 | if ((size_t)(mlen + CAPIMSG_DATALEN(skb->data)) != count) { |
| 723 | kfree_skb(skb); |
| 724 | return -EINVAL; |
| 725 | } |
| 726 | } else { |
| 727 | if (mlen != count) { |
| 728 | kfree_skb(skb); |
| 729 | return -EINVAL; |
| 730 | } |
| 731 | } |
| 732 | CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); |
| 733 | |
| 734 | if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { |
| 735 | down(&cdev->ncci_list_sem); |
| 736 | capincci_free(cdev, CAPIMSG_NCCI(skb->data)); |
| 737 | up(&cdev->ncci_list_sem); |
| 738 | } |
| 739 | |
| 740 | cdev->errcode = capi20_put_message(&cdev->ap, skb); |
| 741 | |
| 742 | if (cdev->errcode) { |
| 743 | kfree_skb(skb); |
| 744 | return -EIO; |
| 745 | } |
| 746 | return count; |
| 747 | } |
| 748 | |
| 749 | static unsigned int |
| 750 | capi_poll(struct file *file, poll_table * wait) |
| 751 | { |
| 752 | struct capidev *cdev = (struct capidev *)file->private_data; |
| 753 | unsigned int mask = 0; |
| 754 | |
| 755 | if (!cdev->ap.applid) |
| 756 | return POLLERR; |
| 757 | |
| 758 | poll_wait(file, &(cdev->recvwait), wait); |
| 759 | mask = POLLOUT | POLLWRNORM; |
| 760 | if (!skb_queue_empty(&cdev->recvqueue)) |
| 761 | mask |= POLLIN | POLLRDNORM; |
| 762 | return mask; |
| 763 | } |
| 764 | |
| 765 | static int |
| 766 | capi_ioctl(struct inode *inode, struct file *file, |
| 767 | unsigned int cmd, unsigned long arg) |
| 768 | { |
| 769 | struct capidev *cdev = file->private_data; |
| 770 | struct capi20_appl *ap = &cdev->ap; |
| 771 | capi_ioctl_struct data; |
| 772 | int retval = -EINVAL; |
| 773 | void __user *argp = (void __user *)arg; |
| 774 | |
| 775 | switch (cmd) { |
| 776 | case CAPI_REGISTER: |
| 777 | { |
| 778 | if (ap->applid) |
| 779 | return -EEXIST; |
| 780 | |
| 781 | if (copy_from_user(&cdev->ap.rparam, argp, |
| 782 | sizeof(struct capi_register_params))) |
| 783 | return -EFAULT; |
| 784 | |
| 785 | cdev->ap.private = cdev; |
| 786 | cdev->ap.recv_message = capi_recv_message; |
| 787 | cdev->errcode = capi20_register(ap); |
| 788 | if (cdev->errcode) { |
| 789 | ap->applid = 0; |
| 790 | return -EIO; |
| 791 | } |
| 792 | } |
| 793 | return (int)ap->applid; |
| 794 | |
| 795 | case CAPI_GET_VERSION: |
| 796 | { |
| 797 | if (copy_from_user(&data.contr, argp, |
| 798 | sizeof(data.contr))) |
| 799 | return -EFAULT; |
| 800 | cdev->errcode = capi20_get_version(data.contr, &data.version); |
| 801 | if (cdev->errcode) |
| 802 | return -EIO; |
| 803 | if (copy_to_user(argp, &data.version, |
| 804 | sizeof(data.version))) |
| 805 | return -EFAULT; |
| 806 | } |
| 807 | return 0; |
| 808 | |
| 809 | case CAPI_GET_SERIAL: |
| 810 | { |
| 811 | if (copy_from_user(&data.contr, argp, |
| 812 | sizeof(data.contr))) |
| 813 | return -EFAULT; |
| 814 | cdev->errcode = capi20_get_serial (data.contr, data.serial); |
| 815 | if (cdev->errcode) |
| 816 | return -EIO; |
| 817 | if (copy_to_user(argp, data.serial, |
| 818 | sizeof(data.serial))) |
| 819 | return -EFAULT; |
| 820 | } |
| 821 | return 0; |
| 822 | case CAPI_GET_PROFILE: |
| 823 | { |
| 824 | if (copy_from_user(&data.contr, argp, |
| 825 | sizeof(data.contr))) |
| 826 | return -EFAULT; |
| 827 | |
| 828 | if (data.contr == 0) { |
| 829 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); |
| 830 | if (cdev->errcode) |
| 831 | return -EIO; |
| 832 | |
| 833 | retval = copy_to_user(argp, |
| 834 | &data.profile.ncontroller, |
| 835 | sizeof(data.profile.ncontroller)); |
| 836 | |
| 837 | } else { |
| 838 | cdev->errcode = capi20_get_profile(data.contr, &data.profile); |
| 839 | if (cdev->errcode) |
| 840 | return -EIO; |
| 841 | |
| 842 | retval = copy_to_user(argp, &data.profile, |
| 843 | sizeof(data.profile)); |
| 844 | } |
| 845 | if (retval) |
| 846 | return -EFAULT; |
| 847 | } |
| 848 | return 0; |
| 849 | |
| 850 | case CAPI_GET_MANUFACTURER: |
| 851 | { |
| 852 | if (copy_from_user(&data.contr, argp, |
| 853 | sizeof(data.contr))) |
| 854 | return -EFAULT; |
| 855 | cdev->errcode = capi20_get_manufacturer(data.contr, data.manufacturer); |
| 856 | if (cdev->errcode) |
| 857 | return -EIO; |
| 858 | |
| 859 | if (copy_to_user(argp, data.manufacturer, |
| 860 | sizeof(data.manufacturer))) |
| 861 | return -EFAULT; |
| 862 | |
| 863 | } |
| 864 | return 0; |
| 865 | case CAPI_GET_ERRCODE: |
| 866 | data.errcode = cdev->errcode; |
| 867 | cdev->errcode = CAPI_NOERROR; |
| 868 | if (arg) { |
| 869 | if (copy_to_user(argp, &data.errcode, |
| 870 | sizeof(data.errcode))) |
| 871 | return -EFAULT; |
| 872 | } |
| 873 | return data.errcode; |
| 874 | |
| 875 | case CAPI_INSTALLED: |
| 876 | if (capi20_isinstalled() == CAPI_NOERROR) |
| 877 | return 0; |
| 878 | return -ENXIO; |
| 879 | |
| 880 | case CAPI_MANUFACTURER_CMD: |
| 881 | { |
| 882 | struct capi_manufacturer_cmd mcmd; |
| 883 | if (!capable(CAP_SYS_ADMIN)) |
| 884 | return -EPERM; |
| 885 | if (copy_from_user(&mcmd, argp, sizeof(mcmd))) |
| 886 | return -EFAULT; |
| 887 | return capi20_manufacturer(mcmd.cmd, mcmd.data); |
| 888 | } |
| 889 | return 0; |
| 890 | |
| 891 | case CAPI_SET_FLAGS: |
| 892 | case CAPI_CLR_FLAGS: |
| 893 | { |
| 894 | unsigned userflags; |
| 895 | if (copy_from_user(&userflags, argp, |
| 896 | sizeof(userflags))) |
| 897 | return -EFAULT; |
| 898 | if (cmd == CAPI_SET_FLAGS) |
| 899 | cdev->userflags |= userflags; |
| 900 | else |
| 901 | cdev->userflags &= ~userflags; |
| 902 | } |
| 903 | return 0; |
| 904 | |
| 905 | case CAPI_GET_FLAGS: |
| 906 | if (copy_to_user(argp, &cdev->userflags, |
| 907 | sizeof(cdev->userflags))) |
| 908 | return -EFAULT; |
| 909 | return 0; |
| 910 | |
| 911 | case CAPI_NCCI_OPENCOUNT: |
| 912 | { |
| 913 | struct capincci *nccip; |
| 914 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 915 | struct capiminor *mp; |
| 916 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 917 | unsigned ncci; |
| 918 | int count = 0; |
| 919 | if (copy_from_user(&ncci, argp, sizeof(ncci))) |
| 920 | return -EFAULT; |
| 921 | |
| 922 | down(&cdev->ncci_list_sem); |
| 923 | if ((nccip = capincci_find(cdev, (u32) ncci)) == 0) { |
| 924 | up(&cdev->ncci_list_sem); |
| 925 | return 0; |
| 926 | } |
| 927 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 928 | if ((mp = nccip->minorp) != 0) { |
| 929 | count += atomic_read(&mp->ttyopencount); |
| 930 | } |
| 931 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 932 | up(&cdev->ncci_list_sem); |
| 933 | return count; |
| 934 | } |
| 935 | return 0; |
| 936 | |
| 937 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 938 | case CAPI_NCCI_GETUNIT: |
| 939 | { |
| 940 | struct capincci *nccip; |
| 941 | struct capiminor *mp; |
| 942 | unsigned ncci; |
| 943 | int unit = 0; |
| 944 | if (copy_from_user(&ncci, argp, |
| 945 | sizeof(ncci))) |
| 946 | return -EFAULT; |
| 947 | down(&cdev->ncci_list_sem); |
| 948 | nccip = capincci_find(cdev, (u32) ncci); |
| 949 | if (!nccip || (mp = nccip->minorp) == 0) { |
| 950 | up(&cdev->ncci_list_sem); |
| 951 | return -ESRCH; |
| 952 | } |
| 953 | unit = mp->minor; |
| 954 | up(&cdev->ncci_list_sem); |
| 955 | return unit; |
| 956 | } |
| 957 | return 0; |
| 958 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 959 | } |
| 960 | return -EINVAL; |
| 961 | } |
| 962 | |
| 963 | static int |
| 964 | capi_open(struct inode *inode, struct file *file) |
| 965 | { |
| 966 | if (file->private_data) |
| 967 | return -EEXIST; |
| 968 | |
| 969 | if ((file->private_data = capidev_alloc()) == 0) |
| 970 | return -ENOMEM; |
| 971 | |
| 972 | return nonseekable_open(inode, file); |
| 973 | } |
| 974 | |
| 975 | static int |
| 976 | capi_release(struct inode *inode, struct file *file) |
| 977 | { |
| 978 | struct capidev *cdev = (struct capidev *)file->private_data; |
| 979 | |
| 980 | capidev_free(cdev); |
| 981 | file->private_data = NULL; |
| 982 | |
| 983 | return 0; |
| 984 | } |
| 985 | |
| 986 | static struct file_operations capi_fops = |
| 987 | { |
| 988 | .owner = THIS_MODULE, |
| 989 | .llseek = no_llseek, |
| 990 | .read = capi_read, |
| 991 | .write = capi_write, |
| 992 | .poll = capi_poll, |
| 993 | .ioctl = capi_ioctl, |
| 994 | .open = capi_open, |
| 995 | .release = capi_release, |
| 996 | }; |
| 997 | |
| 998 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 999 | /* -------- tty_operations for capincci ----------------------------- */ |
| 1000 | |
| 1001 | static int capinc_tty_open(struct tty_struct * tty, struct file * file) |
| 1002 | { |
| 1003 | struct capiminor *mp; |
| 1004 | |
| 1005 | if ((mp = capiminor_find(iminor(file->f_dentry->d_inode))) == 0) |
| 1006 | return -ENXIO; |
| 1007 | if (mp->nccip == 0) |
| 1008 | return -ENXIO; |
| 1009 | |
| 1010 | tty->driver_data = (void *)mp; |
| 1011 | |
| 1012 | if (atomic_read(&mp->ttyopencount) == 0) |
| 1013 | mp->tty = tty; |
| 1014 | atomic_inc(&mp->ttyopencount); |
| 1015 | #ifdef _DEBUG_REFCOUNT |
| 1016 | printk(KERN_DEBUG "capinc_tty_open ocount=%d\n", atomic_read(&mp->ttyopencount)); |
| 1017 | #endif |
| 1018 | handle_minor_recv(mp); |
| 1019 | return 0; |
| 1020 | } |
| 1021 | |
| 1022 | static void capinc_tty_close(struct tty_struct * tty, struct file * file) |
| 1023 | { |
| 1024 | struct capiminor *mp; |
| 1025 | |
| 1026 | mp = (struct capiminor *)tty->driver_data; |
| 1027 | if (mp) { |
| 1028 | if (atomic_dec_and_test(&mp->ttyopencount)) { |
| 1029 | #ifdef _DEBUG_REFCOUNT |
| 1030 | printk(KERN_DEBUG "capinc_tty_close lastclose\n"); |
| 1031 | #endif |
| 1032 | tty->driver_data = NULL; |
| 1033 | mp->tty = NULL; |
| 1034 | } |
| 1035 | #ifdef _DEBUG_REFCOUNT |
| 1036 | printk(KERN_DEBUG "capinc_tty_close ocount=%d\n", atomic_read(&mp->ttyopencount)); |
| 1037 | #endif |
| 1038 | if (mp->nccip == 0) |
| 1039 | capiminor_free(mp); |
| 1040 | } |
| 1041 | |
| 1042 | #ifdef _DEBUG_REFCOUNT |
| 1043 | printk(KERN_DEBUG "capinc_tty_close\n"); |
| 1044 | #endif |
| 1045 | } |
| 1046 | |
| 1047 | static int capinc_tty_write(struct tty_struct * tty, |
| 1048 | const unsigned char *buf, int count) |
| 1049 | { |
| 1050 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1051 | struct sk_buff *skb; |
| 1052 | |
| 1053 | #ifdef _DEBUG_TTYFUNCS |
| 1054 | printk(KERN_DEBUG "capinc_tty_write(count=%d)\n", count); |
| 1055 | #endif |
| 1056 | |
| 1057 | if (!mp || !mp->nccip) { |
| 1058 | #ifdef _DEBUG_TTYFUNCS |
| 1059 | printk(KERN_DEBUG "capinc_tty_write: mp or mp->ncci NULL\n"); |
| 1060 | #endif |
| 1061 | return 0; |
| 1062 | } |
| 1063 | |
| 1064 | skb = mp->ttyskb; |
| 1065 | if (skb) { |
| 1066 | mp->ttyskb = NULL; |
| 1067 | skb_queue_tail(&mp->outqueue, skb); |
| 1068 | mp->outbytes += skb->len; |
| 1069 | } |
| 1070 | |
| 1071 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+count, GFP_ATOMIC); |
| 1072 | if (!skb) { |
| 1073 | printk(KERN_ERR "capinc_tty_write: alloc_skb failed\n"); |
| 1074 | return -ENOMEM; |
| 1075 | } |
| 1076 | |
| 1077 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); |
| 1078 | memcpy(skb_put(skb, count), buf, count); |
| 1079 | |
| 1080 | skb_queue_tail(&mp->outqueue, skb); |
| 1081 | mp->outbytes += skb->len; |
| 1082 | (void)handle_minor_send(mp); |
| 1083 | (void)handle_minor_recv(mp); |
| 1084 | return count; |
| 1085 | } |
| 1086 | |
| 1087 | static void capinc_tty_put_char(struct tty_struct *tty, unsigned char ch) |
| 1088 | { |
| 1089 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1090 | struct sk_buff *skb; |
| 1091 | |
| 1092 | #ifdef _DEBUG_TTYFUNCS |
| 1093 | printk(KERN_DEBUG "capinc_put_char(%u)\n", ch); |
| 1094 | #endif |
| 1095 | |
| 1096 | if (!mp || !mp->nccip) { |
| 1097 | #ifdef _DEBUG_TTYFUNCS |
| 1098 | printk(KERN_DEBUG "capinc_tty_put_char: mp or mp->ncci NULL\n"); |
| 1099 | #endif |
| 1100 | return; |
| 1101 | } |
| 1102 | |
| 1103 | skb = mp->ttyskb; |
| 1104 | if (skb) { |
| 1105 | if (skb_tailroom(skb) > 0) { |
| 1106 | *(skb_put(skb, 1)) = ch; |
| 1107 | return; |
| 1108 | } |
| 1109 | mp->ttyskb = NULL; |
| 1110 | skb_queue_tail(&mp->outqueue, skb); |
| 1111 | mp->outbytes += skb->len; |
| 1112 | (void)handle_minor_send(mp); |
| 1113 | } |
| 1114 | skb = alloc_skb(CAPI_DATA_B3_REQ_LEN+CAPI_MAX_BLKSIZE, GFP_ATOMIC); |
| 1115 | if (skb) { |
| 1116 | skb_reserve(skb, CAPI_DATA_B3_REQ_LEN); |
| 1117 | *(skb_put(skb, 1)) = ch; |
| 1118 | mp->ttyskb = skb; |
| 1119 | } else { |
| 1120 | printk(KERN_ERR "capinc_put_char: char %u lost\n", ch); |
| 1121 | } |
| 1122 | } |
| 1123 | |
| 1124 | static void capinc_tty_flush_chars(struct tty_struct *tty) |
| 1125 | { |
| 1126 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1127 | struct sk_buff *skb; |
| 1128 | |
| 1129 | #ifdef _DEBUG_TTYFUNCS |
| 1130 | printk(KERN_DEBUG "capinc_tty_flush_chars\n"); |
| 1131 | #endif |
| 1132 | |
| 1133 | if (!mp || !mp->nccip) { |
| 1134 | #ifdef _DEBUG_TTYFUNCS |
| 1135 | printk(KERN_DEBUG "capinc_tty_flush_chars: mp or mp->ncci NULL\n"); |
| 1136 | #endif |
| 1137 | return; |
| 1138 | } |
| 1139 | |
| 1140 | skb = mp->ttyskb; |
| 1141 | if (skb) { |
| 1142 | mp->ttyskb = NULL; |
| 1143 | skb_queue_tail(&mp->outqueue, skb); |
| 1144 | mp->outbytes += skb->len; |
| 1145 | (void)handle_minor_send(mp); |
| 1146 | } |
| 1147 | (void)handle_minor_recv(mp); |
| 1148 | } |
| 1149 | |
| 1150 | static int capinc_tty_write_room(struct tty_struct *tty) |
| 1151 | { |
| 1152 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1153 | int room; |
| 1154 | if (!mp || !mp->nccip) { |
| 1155 | #ifdef _DEBUG_TTYFUNCS |
| 1156 | printk(KERN_DEBUG "capinc_tty_write_room: mp or mp->ncci NULL\n"); |
| 1157 | #endif |
| 1158 | return 0; |
| 1159 | } |
| 1160 | room = CAPINC_MAX_SENDQUEUE-skb_queue_len(&mp->outqueue); |
| 1161 | room *= CAPI_MAX_BLKSIZE; |
| 1162 | #ifdef _DEBUG_TTYFUNCS |
| 1163 | printk(KERN_DEBUG "capinc_tty_write_room = %d\n", room); |
| 1164 | #endif |
| 1165 | return room; |
| 1166 | } |
| 1167 | |
Adrian Bunk | 408b664 | 2005-05-01 08:59:29 -0700 | [diff] [blame] | 1168 | static int capinc_tty_chars_in_buffer(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | { |
| 1170 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1171 | if (!mp || !mp->nccip) { |
| 1172 | #ifdef _DEBUG_TTYFUNCS |
| 1173 | printk(KERN_DEBUG "capinc_tty_chars_in_buffer: mp or mp->ncci NULL\n"); |
| 1174 | #endif |
| 1175 | return 0; |
| 1176 | } |
| 1177 | #ifdef _DEBUG_TTYFUNCS |
| 1178 | printk(KERN_DEBUG "capinc_tty_chars_in_buffer = %d nack=%d sq=%d rq=%d\n", |
| 1179 | mp->outbytes, mp->nack, |
| 1180 | skb_queue_len(&mp->outqueue), |
| 1181 | skb_queue_len(&mp->inqueue)); |
| 1182 | #endif |
| 1183 | return mp->outbytes; |
| 1184 | } |
| 1185 | |
| 1186 | static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file, |
| 1187 | unsigned int cmd, unsigned long arg) |
| 1188 | { |
| 1189 | int error = 0; |
| 1190 | switch (cmd) { |
| 1191 | default: |
| 1192 | error = n_tty_ioctl (tty, file, cmd, arg); |
| 1193 | break; |
| 1194 | } |
| 1195 | return error; |
| 1196 | } |
| 1197 | |
| 1198 | static void capinc_tty_set_termios(struct tty_struct *tty, struct termios * old) |
| 1199 | { |
| 1200 | #ifdef _DEBUG_TTYFUNCS |
| 1201 | printk(KERN_DEBUG "capinc_tty_set_termios\n"); |
| 1202 | #endif |
| 1203 | } |
| 1204 | |
| 1205 | static void capinc_tty_throttle(struct tty_struct * tty) |
| 1206 | { |
| 1207 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1208 | #ifdef _DEBUG_TTYFUNCS |
| 1209 | printk(KERN_DEBUG "capinc_tty_throttle\n"); |
| 1210 | #endif |
| 1211 | if (mp) |
| 1212 | mp->ttyinstop = 1; |
| 1213 | } |
| 1214 | |
| 1215 | static void capinc_tty_unthrottle(struct tty_struct * tty) |
| 1216 | { |
| 1217 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1218 | #ifdef _DEBUG_TTYFUNCS |
| 1219 | printk(KERN_DEBUG "capinc_tty_unthrottle\n"); |
| 1220 | #endif |
| 1221 | if (mp) { |
| 1222 | mp->ttyinstop = 0; |
| 1223 | handle_minor_recv(mp); |
| 1224 | } |
| 1225 | } |
| 1226 | |
| 1227 | static void capinc_tty_stop(struct tty_struct *tty) |
| 1228 | { |
| 1229 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1230 | #ifdef _DEBUG_TTYFUNCS |
| 1231 | printk(KERN_DEBUG "capinc_tty_stop\n"); |
| 1232 | #endif |
| 1233 | if (mp) { |
| 1234 | mp->ttyoutstop = 1; |
| 1235 | } |
| 1236 | } |
| 1237 | |
| 1238 | static void capinc_tty_start(struct tty_struct *tty) |
| 1239 | { |
| 1240 | struct capiminor *mp = (struct capiminor *)tty->driver_data; |
| 1241 | #ifdef _DEBUG_TTYFUNCS |
| 1242 | printk(KERN_DEBUG "capinc_tty_start\n"); |
| 1243 | #endif |
| 1244 | if (mp) { |
| 1245 | mp->ttyoutstop = 0; |
| 1246 | (void)handle_minor_send(mp); |
| 1247 | } |
| 1248 | } |
| 1249 | |
| 1250 | static void capinc_tty_hangup(struct tty_struct *tty) |
| 1251 | { |
| 1252 | #ifdef _DEBUG_TTYFUNCS |
| 1253 | printk(KERN_DEBUG "capinc_tty_hangup\n"); |
| 1254 | #endif |
| 1255 | } |
| 1256 | |
| 1257 | static void capinc_tty_break_ctl(struct tty_struct *tty, int state) |
| 1258 | { |
| 1259 | #ifdef _DEBUG_TTYFUNCS |
| 1260 | printk(KERN_DEBUG "capinc_tty_break_ctl(%d)\n", state); |
| 1261 | #endif |
| 1262 | } |
| 1263 | |
| 1264 | static void capinc_tty_flush_buffer(struct tty_struct *tty) |
| 1265 | { |
| 1266 | #ifdef _DEBUG_TTYFUNCS |
| 1267 | printk(KERN_DEBUG "capinc_tty_flush_buffer\n"); |
| 1268 | #endif |
| 1269 | } |
| 1270 | |
| 1271 | static void capinc_tty_set_ldisc(struct tty_struct *tty) |
| 1272 | { |
| 1273 | #ifdef _DEBUG_TTYFUNCS |
| 1274 | printk(KERN_DEBUG "capinc_tty_set_ldisc\n"); |
| 1275 | #endif |
| 1276 | } |
| 1277 | |
| 1278 | static void capinc_tty_send_xchar(struct tty_struct *tty, char ch) |
| 1279 | { |
| 1280 | #ifdef _DEBUG_TTYFUNCS |
| 1281 | printk(KERN_DEBUG "capinc_tty_send_xchar(%d)\n", ch); |
| 1282 | #endif |
| 1283 | } |
| 1284 | |
| 1285 | static int capinc_tty_read_proc(char *page, char **start, off_t off, |
| 1286 | int count, int *eof, void *data) |
| 1287 | { |
| 1288 | return 0; |
| 1289 | } |
| 1290 | |
| 1291 | static struct tty_driver *capinc_tty_driver; |
| 1292 | |
| 1293 | static struct tty_operations capinc_ops = { |
| 1294 | .open = capinc_tty_open, |
| 1295 | .close = capinc_tty_close, |
| 1296 | .write = capinc_tty_write, |
| 1297 | .put_char = capinc_tty_put_char, |
| 1298 | .flush_chars = capinc_tty_flush_chars, |
| 1299 | .write_room = capinc_tty_write_room, |
| 1300 | .chars_in_buffer = capinc_tty_chars_in_buffer, |
| 1301 | .ioctl = capinc_tty_ioctl, |
| 1302 | .set_termios = capinc_tty_set_termios, |
| 1303 | .throttle = capinc_tty_throttle, |
| 1304 | .unthrottle = capinc_tty_unthrottle, |
| 1305 | .stop = capinc_tty_stop, |
| 1306 | .start = capinc_tty_start, |
| 1307 | .hangup = capinc_tty_hangup, |
| 1308 | .break_ctl = capinc_tty_break_ctl, |
| 1309 | .flush_buffer = capinc_tty_flush_buffer, |
| 1310 | .set_ldisc = capinc_tty_set_ldisc, |
| 1311 | .send_xchar = capinc_tty_send_xchar, |
| 1312 | .read_proc = capinc_tty_read_proc, |
| 1313 | }; |
| 1314 | |
| 1315 | static int capinc_tty_init(void) |
| 1316 | { |
| 1317 | struct tty_driver *drv; |
| 1318 | |
| 1319 | if (capi_ttyminors > CAPINC_MAX_PORTS) |
| 1320 | capi_ttyminors = CAPINC_MAX_PORTS; |
| 1321 | if (capi_ttyminors <= 0) |
| 1322 | capi_ttyminors = CAPINC_NR_PORTS; |
| 1323 | |
| 1324 | drv = alloc_tty_driver(capi_ttyminors); |
| 1325 | if (!drv) |
| 1326 | return -ENOMEM; |
| 1327 | |
| 1328 | drv->owner = THIS_MODULE; |
| 1329 | drv->driver_name = "capi_nc"; |
| 1330 | drv->devfs_name = "capi/"; |
| 1331 | drv->name = "capi"; |
| 1332 | drv->major = capi_ttymajor; |
| 1333 | drv->minor_start = 0; |
| 1334 | drv->type = TTY_DRIVER_TYPE_SERIAL; |
| 1335 | drv->subtype = SERIAL_TYPE_NORMAL; |
| 1336 | drv->init_termios = tty_std_termios; |
| 1337 | drv->init_termios.c_iflag = ICRNL; |
| 1338 | drv->init_termios.c_oflag = OPOST | ONLCR; |
| 1339 | drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| 1340 | drv->init_termios.c_lflag = 0; |
| 1341 | drv->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_RESET_TERMIOS; |
| 1342 | tty_set_operations(drv, &capinc_ops); |
| 1343 | if (tty_register_driver(drv)) { |
| 1344 | put_tty_driver(drv); |
| 1345 | printk(KERN_ERR "Couldn't register capi_nc driver\n"); |
| 1346 | return -1; |
| 1347 | } |
| 1348 | capinc_tty_driver = drv; |
| 1349 | return 0; |
| 1350 | } |
| 1351 | |
| 1352 | static void capinc_tty_exit(void) |
| 1353 | { |
| 1354 | struct tty_driver *drv = capinc_tty_driver; |
| 1355 | int retval; |
| 1356 | if ((retval = tty_unregister_driver(drv))) |
| 1357 | printk(KERN_ERR "capi: failed to unregister capi_nc driver (%d)\n", retval); |
| 1358 | put_tty_driver(drv); |
| 1359 | } |
| 1360 | |
| 1361 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 1362 | |
| 1363 | /* -------- /proc functions ----------------------------------------- */ |
| 1364 | |
| 1365 | /* |
| 1366 | * /proc/capi/capi20: |
| 1367 | * minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt |
| 1368 | */ |
| 1369 | static int proc_capidev_read_proc(char *page, char **start, off_t off, |
| 1370 | int count, int *eof, void *data) |
| 1371 | { |
| 1372 | struct capidev *cdev; |
| 1373 | struct list_head *l; |
| 1374 | int len = 0; |
| 1375 | |
| 1376 | read_lock(&capidev_list_lock); |
| 1377 | list_for_each(l, &capidev_list) { |
| 1378 | cdev = list_entry(l, struct capidev, list); |
| 1379 | len += sprintf(page+len, "0 %d %lu %lu %lu %lu\n", |
| 1380 | cdev->ap.applid, |
| 1381 | cdev->ap.nrecvctlpkt, |
| 1382 | cdev->ap.nrecvdatapkt, |
| 1383 | cdev->ap.nsentctlpkt, |
| 1384 | cdev->ap.nsentdatapkt); |
| 1385 | if (len <= off) { |
| 1386 | off -= len; |
| 1387 | len = 0; |
| 1388 | } else { |
| 1389 | if (len-off > count) |
| 1390 | goto endloop; |
| 1391 | } |
| 1392 | } |
| 1393 | |
| 1394 | endloop: |
| 1395 | read_unlock(&capidev_list_lock); |
| 1396 | if (len < count) |
| 1397 | *eof = 1; |
| 1398 | if (len > count) len = count; |
| 1399 | if (len < 0) len = 0; |
| 1400 | return len; |
| 1401 | } |
| 1402 | |
| 1403 | /* |
| 1404 | * /proc/capi/capi20ncci: |
| 1405 | * applid ncci |
| 1406 | */ |
| 1407 | static int proc_capincci_read_proc(char *page, char **start, off_t off, |
| 1408 | int count, int *eof, void *data) |
| 1409 | { |
| 1410 | struct capidev *cdev; |
| 1411 | struct capincci *np; |
| 1412 | struct list_head *l; |
| 1413 | int len = 0; |
| 1414 | |
| 1415 | read_lock(&capidev_list_lock); |
| 1416 | list_for_each(l, &capidev_list) { |
| 1417 | cdev = list_entry(l, struct capidev, list); |
| 1418 | for (np=cdev->nccis; np; np = np->next) { |
| 1419 | len += sprintf(page+len, "%d 0x%x\n", |
| 1420 | cdev->ap.applid, |
| 1421 | np->ncci); |
| 1422 | if (len <= off) { |
| 1423 | off -= len; |
| 1424 | len = 0; |
| 1425 | } else { |
| 1426 | if (len-off > count) |
| 1427 | goto endloop; |
| 1428 | } |
| 1429 | } |
| 1430 | } |
| 1431 | endloop: |
| 1432 | read_unlock(&capidev_list_lock); |
| 1433 | *start = page+off; |
| 1434 | if (len < count) |
| 1435 | *eof = 1; |
| 1436 | if (len>count) len = count; |
| 1437 | if (len<0) len = 0; |
| 1438 | return len; |
| 1439 | } |
| 1440 | |
| 1441 | static struct procfsentries { |
| 1442 | char *name; |
| 1443 | mode_t mode; |
| 1444 | int (*read_proc)(char *page, char **start, off_t off, |
| 1445 | int count, int *eof, void *data); |
| 1446 | struct proc_dir_entry *procent; |
| 1447 | } procfsentries[] = { |
| 1448 | /* { "capi", S_IFDIR, 0 }, */ |
| 1449 | { "capi/capi20", 0 , proc_capidev_read_proc }, |
| 1450 | { "capi/capi20ncci", 0 , proc_capincci_read_proc }, |
| 1451 | }; |
| 1452 | |
| 1453 | static void __init proc_init(void) |
| 1454 | { |
| 1455 | int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]); |
| 1456 | int i; |
| 1457 | |
| 1458 | for (i=0; i < nelem; i++) { |
| 1459 | struct procfsentries *p = procfsentries + i; |
| 1460 | p->procent = create_proc_entry(p->name, p->mode, NULL); |
| 1461 | if (p->procent) p->procent->read_proc = p->read_proc; |
| 1462 | } |
| 1463 | } |
| 1464 | |
| 1465 | static void __exit proc_exit(void) |
| 1466 | { |
| 1467 | int nelem = sizeof(procfsentries)/sizeof(procfsentries[0]); |
| 1468 | int i; |
| 1469 | |
| 1470 | for (i=nelem-1; i >= 0; i--) { |
| 1471 | struct procfsentries *p = procfsentries + i; |
| 1472 | if (p->procent) { |
| 1473 | remove_proc_entry(p->name, NULL); |
| 1474 | p->procent = NULL; |
| 1475 | } |
| 1476 | } |
| 1477 | } |
| 1478 | |
| 1479 | /* -------- init function and module interface ---------------------- */ |
| 1480 | |
| 1481 | |
| 1482 | static char rev[32]; |
| 1483 | |
| 1484 | static int __init capi_init(void) |
| 1485 | { |
| 1486 | char *p; |
| 1487 | char *compileinfo; |
| 1488 | |
| 1489 | if ((p = strchr(revision, ':')) != 0 && p[1]) { |
| 1490 | strlcpy(rev, p + 2, sizeof(rev)); |
| 1491 | if ((p = strchr(rev, '$')) != 0 && p > rev) |
| 1492 | *(p-1) = 0; |
| 1493 | } else |
| 1494 | strcpy(rev, "1.0"); |
| 1495 | |
| 1496 | if (register_chrdev(capi_major, "capi20", &capi_fops)) { |
| 1497 | printk(KERN_ERR "capi20: unable to get major %d\n", capi_major); |
| 1498 | return -EIO; |
| 1499 | } |
| 1500 | |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 1501 | capi_class = class_create(THIS_MODULE, "capi"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | if (IS_ERR(capi_class)) { |
| 1503 | unregister_chrdev(capi_major, "capi20"); |
| 1504 | return PTR_ERR(capi_class); |
| 1505 | } |
| 1506 | |
Greg Kroah-Hartman | 53f4654 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1507 | class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | devfs_mk_cdev(MKDEV(capi_major, 0), S_IFCHR | S_IRUSR | S_IWUSR, |
| 1509 | "isdn/capi20"); |
| 1510 | |
| 1511 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 1512 | if (capinc_tty_init() < 0) { |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 1513 | class_device_destroy(capi_class, MKDEV(capi_major, 0)); |
| 1514 | class_destroy(capi_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1515 | unregister_chrdev(capi_major, "capi20"); |
| 1516 | return -ENOMEM; |
| 1517 | } |
| 1518 | #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ |
| 1519 | |
| 1520 | proc_init(); |
| 1521 | |
| 1522 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 1523 | #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE) |
| 1524 | compileinfo = " (middleware+capifs)"; |
| 1525 | #else |
| 1526 | compileinfo = " (no capifs)"; |
| 1527 | #endif |
| 1528 | #else |
| 1529 | compileinfo = " (no middleware)"; |
| 1530 | #endif |
| 1531 | printk(KERN_NOTICE "capi20: Rev %s: started up with major %d%s\n", |
| 1532 | rev, capi_major, compileinfo); |
| 1533 | |
| 1534 | return 0; |
| 1535 | } |
| 1536 | |
| 1537 | static void __exit capi_exit(void) |
| 1538 | { |
| 1539 | proc_exit(); |
| 1540 | |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 1541 | class_device_destroy(capi_class, MKDEV(capi_major, 0)); |
| 1542 | class_destroy(capi_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | unregister_chrdev(capi_major, "capi20"); |
| 1544 | devfs_remove("isdn/capi20"); |
| 1545 | |
| 1546 | #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE |
| 1547 | capinc_tty_exit(); |
| 1548 | #endif |
| 1549 | printk(KERN_NOTICE "capi: Rev %s: unloaded\n", rev); |
| 1550 | } |
| 1551 | |
| 1552 | module_init(capi_init); |
| 1553 | module_exit(capi_exit); |