drivers/isdn/capi/kcapi.c

   1 /* $Id: kcapi.c,v 1.1.2.8 2004/03/26 19:57:20 armin Exp $
   2  *
   3  * Kernel CAPI 2.0 Module
   4  *
   5  * Copyright 1999 by Carsten Paeth <calle@calle.de>
   6  * Copyright 2002 by Kai Germaschewski <kai@germaschewski.name>
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  *
  11  */
  12
  13 #define AVMB1_COMPAT
  14
  15 #include "kcapi.h"
  16 #include <linux/module.h>
  17 #include <linux/mm.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/ioport.h>
  20 #include <linux/proc_fs.h>
  21 #include <linux/seq_file.h>
  22 #include <linux/skbuff.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/capi.h>
  25 #include <linux/kernelcapi.h>
  26 #include <linux/init.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/delay.h>
  29 #include <asm/uaccess.h>
  30 #include <linux/isdn/capicmd.h>
  31 #include <linux/isdn/capiutil.h>
  32 #ifdef AVMB1_COMPAT
  33 #include <linux/b1lli.h>
  34 #endif
  35 #include <linux/mutex.h>
  36
  37 static char *revision = "$Revision: 1.1.2.8 $";
  38
  39 /* ------------------------------------------------------------- */
  40
  41 static int showcapimsgs = 0;
  42
  43 MODULE_DESCRIPTION("CAPI4Linux: kernel CAPI layer");
  44 MODULE_AUTHOR("Carsten Paeth");
  45 MODULE_LICENSE("GPL");
  46 module_param(showcapimsgs, uint, 0);
  47
  48 /* ------------------------------------------------------------- */
  49
  50 struct capi_notifier {
  51         struct work_struct work;
  52         unsigned int cmd;
  53         u32 controller;
  54         u16 applid;
  55         u32 ncci;
  56 };
  57
  58 /* ------------------------------------------------------------- */
  59
  60 static struct capi_version driver_version = {2, 0, 1, 1<<4};
  61 static char driver_serial[CAPI_SERIAL_LEN] = "0004711";
  62 static char capi_manufakturer[64] = "AVM Berlin";
  63
  64 #define NCCI2CTRL(ncci)    (((ncci) >> 24) & 0x7f)
  65
  66 LIST_HEAD(capi_drivers);
  67 DEFINE_RWLOCK(capi_drivers_list_lock);
  68
  69 static DEFINE_RWLOCK(application_lock);
  70 static DEFINE_MUTEX(controller_mutex);
  71
  72 struct capi20_appl *capi_applications[CAPI_MAXAPPL];
  73 struct capi_ctr *capi_cards[CAPI_MAXCONTR];
  74
  75 static int ncards;
  76
  77 /* -------- controller ref counting -------------------------------------- */
  78
  79 static inline struct capi_ctr *
  80 capi_ctr_get(struct capi_ctr *card)
  81 {
  82         if (!try_module_get(card->owner))
  83                 return NULL;
  84         return card;
  85 }
  86
  87 static inline void
  88 capi_ctr_put(struct capi_ctr *card)
  89 {
  90         module_put(card->owner);
  91 }
  92
  93 /* ------------------------------------------------------------- */
  94
  95 static inline struct capi_ctr *get_capi_ctr_by_nr(u16 contr)
  96 {
  97         if (contr - 1 >= CAPI_MAXCONTR)
  98                 return NULL;
  99
 100         return capi_cards[contr - 1];
 101 }
 102
 103 static inline struct capi20_appl *get_capi_appl_by_nr(u16 applid)
 104 {
 105         if (applid - 1 >= CAPI_MAXAPPL)
 106                 return NULL;
 107
 108         return capi_applications[applid - 1];
 109 }
 110
 111 /* -------- util functions ------------------------------------ */
 112
 113 static inline int capi_cmd_valid(u8 cmd)
 114 {
 115         switch (cmd) {
 116         case CAPI_ALERT:
 117         case CAPI_CONNECT:
 118         case CAPI_CONNECT_ACTIVE:
 119         case CAPI_CONNECT_B3_ACTIVE:
 120         case CAPI_CONNECT_B3:
 121         case CAPI_CONNECT_B3_T90_ACTIVE:
 122         case CAPI_DATA_B3:
 123         case CAPI_DISCONNECT_B3:
 124         case CAPI_DISCONNECT:
 125         case CAPI_FACILITY:
 126         case CAPI_INFO:
 127         case CAPI_LISTEN:
 128         case CAPI_MANUFACTURER:
 129         case CAPI_RESET_B3:
 130         case CAPI_SELECT_B_PROTOCOL:
 131                 return 1;
 132         }
 133         return 0;
 134 }
 135
 136 static inline int capi_subcmd_valid(u8 subcmd)
 137 {
 138         switch (subcmd) {
 139         case CAPI_REQ:
 140         case CAPI_CONF:
 141         case CAPI_IND:
 142         case CAPI_RESP:
 143                 return 1;
 144         }
 145         return 0;
 146 }
 147
 148 /* ------------------------------------------------------------ */
 149
 150 static void register_appl(struct capi_ctr *card, u16 applid, capi_register_params *rparam)
 151 {
 152         card = capi_ctr_get(card);
 153
 154         if (card)
 155                 card->register_appl(card, applid, rparam);
 156         else
 157                 printk(KERN_WARNING "%s: cannot get card resources\n", __func__);
 158 }
 159
 160
 161 static void release_appl(struct capi_ctr *card, u16 applid)
 162 {
 163         DBG("applid %#x", applid);
 164
 165         card->release_appl(card, applid);
 166         capi_ctr_put(card);
 167 }
 168
 169 /* -------- KCI_CONTRUP --------------------------------------- */
 170
 171 static void notify_up(u32 contr)
 172 {
 173         struct capi_ctr *card = get_capi_ctr_by_nr(contr);
 174         struct capi20_appl *ap;
 175         u16 applid;
 176
 177         if (showcapimsgs & 1) {
 178                 printk(KERN_DEBUG "kcapi: notify up contr %d\n", contr);
 179         }
 180         if (!card) {
 181                 printk(KERN_WARNING "%s: invalid contr %d\n", __func__, contr);
 182                 return;
 183         }
 184         for (applid = 1; applid <= CAPI_MAXAPPL; applid++) {
 185                 ap = get_capi_appl_by_nr(applid);
 186                 if (!ap || ap->release_in_progress) continue;
 187                 register_appl(card, applid, &ap->rparam);
 188                 if (ap->callback && !ap->release_in_progress)
 189                         ap->callback(KCI_CONTRUP, contr, &card->profile);
 190         }
 191 }
 192
 193 /* -------- KCI_CONTRDOWN ------------------------------------- */
 194
 195 static void notify_down(u32 contr)
 196 {
 197         struct capi20_appl *ap;
 198         u16 applid;
 199
 200         if (showcapimsgs & 1) {
 201                 printk(KERN_DEBUG "kcapi: notify down contr %d\n", contr);
 202         }
 203
 204         for (applid = 1; applid <= CAPI_MAXAPPL; applid++) {
 205                 ap = get_capi_appl_by_nr(applid);
 206                 if (ap && ap->callback && !ap->release_in_progress)
 207                         ap->callback(KCI_CONTRDOWN, contr, NULL);
 208         }
 209 }
 210
 211 static void notify_handler(struct work_struct *work)
 212 {
 213         struct capi_notifier *np =
 214                 container_of(work, struct capi_notifier, work);
 215
 216         switch (np->cmd) {
 217         case KCI_CONTRUP:
 218                 notify_up(np->controller);
 219                 break;
 220         case KCI_CONTRDOWN:
 221                 notify_down(np->controller);
 222                 break;
 223         }
 224
 225         kfree(np);
 226 }
 227
 228 /*
 229  * The notifier will result in adding/deleteing of devices. Devices can
 230  * only removed in user process, not in bh.
 231  */
 232 static int notify_push(unsigned int cmd, u32 controller, u16 applid, u32 ncci)
 233 {
 234         struct capi_notifier *np = kmalloc(sizeof(*np), GFP_ATOMIC);
 235
 236         if (!np)
 237                 return -ENOMEM;
 238
 239         INIT_WORK(&np->work, notify_handler);
 240         np->cmd = cmd;
 241         np->controller = controller;
 242         np->applid = applid;
 243         np->ncci = ncci;
 244
 245         schedule_work(&np->work);
 246         return 0;
 247 }
 248
 249
 250 /* -------- Receiver ------------------------------------------ */
 251
 252 static void recv_handler(struct work_struct *work)
 253 {
 254         struct sk_buff *skb;
 255         struct capi20_appl *ap =
 256                 container_of(work, struct capi20_appl, recv_work);
 257
 258         if ((!ap) || (ap->release_in_progress))
 259                 return;
 260
 261         mutex_lock(&ap->recv_mtx);
 262         while ((skb = skb_dequeue(&ap->recv_queue))) {
 263                 if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_IND)
 264                         ap->nrecvdatapkt++;
 265                 else
 266                         ap->nrecvctlpkt++;
 267
 268                 ap->recv_message(ap, skb);
 269         }
 270         mutex_unlock(&ap->recv_mtx);
 271 }
 272
 273 /**
 274  * capi_ctr_handle_message() - handle incoming CAPI message
 275  * @card:       controller descriptor structure.
 276  * @appl:       application ID.
 277  * @skb:        message.
 278  *
 279  * Called by hardware driver to pass a CAPI message to the application.
 280  */
 281
 282 void capi_ctr_handle_message(struct capi_ctr * card, u16 appl, struct sk_buff *skb)
 283 {
 284         struct capi20_appl *ap;
 285         int showctl = 0;
 286         u8 cmd, subcmd;
 287         unsigned long flags;
 288         _cdebbuf *cdb;
 289
 290         if (card->cardstate != CARD_RUNNING) {
 291                 cdb = capi_message2str(skb->data);
 292                 if (cdb) {
 293                         printk(KERN_INFO "kcapi: controller [%03d] not active, got: %s",
 294                                 card->cnr, cdb->buf);
 295                         cdebbuf_free(cdb);
 296                 } else
 297                         printk(KERN_INFO "kcapi: controller [%03d] not active, cannot trace\n",
 298                                 card->cnr);
 299                 goto error;
 300         }
 301
 302         cmd = CAPIMSG_COMMAND(skb->data);
 303         subcmd = CAPIMSG_SUBCOMMAND(skb->data);
 304         if (cmd == CAPI_DATA_B3 && subcmd == CAPI_IND) {
 305                 card->nrecvdatapkt++;
 306                 if (card->traceflag > 2) showctl |= 2;
 307         } else {
 308                 card->nrecvctlpkt++;
 309                 if (card->traceflag) showctl |= 2;
 310         }
 311         showctl |= (card->traceflag & 1);
 312         if (showctl & 2) {
 313                 if (showctl & 1) {
 314                         printk(KERN_DEBUG "kcapi: got [%03d] id#%d %s len=%u\n",
 315                                card->cnr, CAPIMSG_APPID(skb->data),
 316                                capi_cmd2str(cmd, subcmd),
 317                                CAPIMSG_LEN(skb->data));
 318                 } else {
 319                         cdb = capi_message2str(skb->data);
 320                         if (cdb) {
 321                                 printk(KERN_DEBUG "kcapi: got [%03d] %s\n",
 322                                         card->cnr, cdb->buf);
 323                                 cdebbuf_free(cdb);
 324                         } else
 325                                 printk(KERN_DEBUG "kcapi: got [%03d] id#%d %s len=%u, cannot trace\n",
 326                                         card->cnr, CAPIMSG_APPID(skb->data),
 327                                         capi_cmd2str(cmd, subcmd),
 328                                         CAPIMSG_LEN(skb->data));
 329                 }
 330
 331         }
 332
 333         read_lock_irqsave(&application_lock, flags);
 334         ap = get_capi_appl_by_nr(CAPIMSG_APPID(skb->data));
 335         if ((!ap) || (ap->release_in_progress)) {
 336                 read_unlock_irqrestore(&application_lock, flags);
 337                 cdb = capi_message2str(skb->data);
 338                 if (cdb) {
 339                         printk(KERN_ERR "kcapi: handle_message: applid %d state released (%s)\n",
 340                         CAPIMSG_APPID(skb->data), cdb->buf);
 341                         cdebbuf_free(cdb);
 342                 } else
 343                         printk(KERN_ERR "kcapi: handle_message: applid %d state released (%s) cannot trace\n",
 344                                 CAPIMSG_APPID(skb->data),
 345                                 capi_cmd2str(cmd, subcmd));
 346                 goto error;
 347         }
 348         skb_queue_tail(&ap->recv_queue, skb);
 349         schedule_work(&ap->recv_work);
 350         read_unlock_irqrestore(&application_lock, flags);
 351
 352         return;
 353
 354 error:
 355         kfree_skb(skb);
 356 }
 357
 358 EXPORT_SYMBOL(capi_ctr_handle_message);
 359
 360 /**
 361  * capi_ctr_ready() - signal CAPI controller ready
 362  * @card:       controller descriptor structure.
 363  *
 364  * Called by hardware driver to signal that the controller is up and running.
 365  */
 366
 367 void capi_ctr_ready(struct capi_ctr * card)
 368 {
 369         card->cardstate = CARD_RUNNING;
 370
 371         printk(KERN_NOTICE "kcapi: card [%03d] \"%s\" ready.\n",
 372                card->cnr, card->name);
 373
 374         notify_push(KCI_CONTRUP, card->cnr, 0, 0);
 375 }
 376
 377 EXPORT_SYMBOL(capi_ctr_ready);
 378
 379 /**
 380  * capi_ctr_down() - signal CAPI controller not ready
 381  * @card:       controller descriptor structure.
 382  *
 383  * Called by hardware driver to signal that the controller is down and
 384  * unavailable for use.
 385  */
 386
 387 void capi_ctr_down(struct capi_ctr * card)
 388 {
 389         u16 appl;
 390
 391         DBG("");
 392
 393         if (card->cardstate == CARD_DETECTED)
 394                 return;
 395
 396         card->cardstate = CARD_DETECTED;
 397
 398         memset(card->manu, 0, sizeof(card->manu));
 399         memset(&card->version, 0, sizeof(card->version));
 400         memset(&card->profile, 0, sizeof(card->profile));
 401         memset(card->serial, 0, sizeof(card->serial));
 402
 403         for (appl = 1; appl <= CAPI_MAXAPPL; appl++) {
 404                 struct capi20_appl *ap = get_capi_appl_by_nr(appl);
 405                 if (!ap || ap->release_in_progress)
 406                         continue;
 407
 408                 capi_ctr_put(card);
 409         }
 410
 411         printk(KERN_NOTICE "kcapi: card [%03d] down.\n", card->cnr);
 412
 413         notify_push(KCI_CONTRDOWN, card->cnr, 0, 0);
 414 }
 415
 416 EXPORT_SYMBOL(capi_ctr_down);
 417
 418 /**
 419  * capi_ctr_suspend_output() - suspend controller
 420  * @card:       controller descriptor structure.
 421  *
 422  * Called by hardware driver to stop data flow.
 423  */
 424
 425 void capi_ctr_suspend_output(struct capi_ctr *card)
 426 {
 427         if (!card->blocked) {
 428                 printk(KERN_DEBUG "kcapi: card [%03d] suspend\n", card->cnr);
 429                 card->blocked = 1;
 430         }
 431 }
 432
 433 EXPORT_SYMBOL(capi_ctr_suspend_output);
 434
 435 /**
 436  * capi_ctr_resume_output() - resume controller
 437  * @card:       controller descriptor structure.
 438  *
 439  * Called by hardware driver to resume data flow.
 440  */
 441
 442 void capi_ctr_resume_output(struct capi_ctr *card)
 443 {
 444         if (card->blocked) {
 445                 printk(KERN_DEBUG "kcapi: card [%03d] resume\n", card->cnr);
 446                 card->blocked = 0;
 447         }
 448 }
 449
 450 EXPORT_SYMBOL(capi_ctr_resume_output);
 451
 452 /* ------------------------------------------------------------- */
 453
 454 /**
 455  * attach_capi_ctr() - register CAPI controller
 456  * @card:       controller descriptor structure.
 457  *
 458  * Called by hardware driver to register a controller with the CAPI subsystem.
 459  * Return value: 0 on success, error code < 0 on error
 460  */
 461
 462 int
 463 attach_capi_ctr(struct capi_ctr *card)
 464 {
 465         int i;
 466
 467         mutex_lock(&controller_mutex);
 468
 469         for (i = 0; i < CAPI_MAXCONTR; i++) {
 470                 if (capi_cards[i] == NULL)
 471                         break;
 472         }
 473         if (i == CAPI_MAXCONTR) {
 474                 mutex_unlock(&controller_mutex);
 475                 printk(KERN_ERR "kcapi: out of controller slots\n");
 476                 return -EBUSY;
 477         }
 478         capi_cards[i] = card;
 479
 480         mutex_unlock(&controller_mutex);
 481
 482         card->nrecvctlpkt = 0;
 483         card->nrecvdatapkt = 0;
 484         card->nsentctlpkt = 0;
 485         card->nsentdatapkt = 0;
 486         card->cnr = i + 1;
 487         card->cardstate = CARD_DETECTED;
 488         card->blocked = 0;
 489         card->traceflag = showcapimsgs;
 490
 491         sprintf(card->procfn, "capi/controllers/%d", card->cnr);
 492         card->procent = create_proc_entry(card->procfn, 0, NULL);
 493         if (card->procent) {
 494            card->procent->read_proc =
 495                 (int (*)(char *,char **,off_t,int,int *,void *))
 496                         card->ctr_read_proc;
 497            card->procent->data = card;
 498         }
 499
 500         ncards++;
 501         printk(KERN_NOTICE "kcapi: Controller [%03d]: %s attached\n",
 502                         card->cnr, card->name);
 503         return 0;
 504 }
 505
 506 EXPORT_SYMBOL(attach_capi_ctr);
 507
 508 /**
 509  * detach_capi_ctr() - unregister CAPI controller
 510  * @card:       controller descriptor structure.
 511  *
 512  * Called by hardware driver to remove the registration of a controller
 513  * with the CAPI subsystem.
 514  * Return value: 0 on success, error code < 0 on error
 515  */
 516
 517 int detach_capi_ctr(struct capi_ctr *card)
 518 {
 519         if (card->cardstate != CARD_DETECTED)
 520                 capi_ctr_down(card);
 521
 522         ncards--;
 523
 524         if (card->procent) {
 525            remove_proc_entry(card->procfn, NULL);
 526            card->procent = NULL;
 527         }
 528         capi_cards[card->cnr - 1] = NULL;
 529         printk(KERN_NOTICE "kcapi: Controller [%03d]: %s unregistered\n",
 530                         card->cnr, card->name);
 531
 532         return 0;
 533 }
 534
 535 EXPORT_SYMBOL(detach_capi_ctr);
 536
 537 /**
 538  * register_capi_driver() - register CAPI driver
 539  * @driver:     driver descriptor structure.
 540  *
 541  * Called by hardware driver to register itself with the CAPI subsystem.
 542  */
 543
 544 void register_capi_driver(struct capi_driver *driver)
 545 {
 546         unsigned long flags;
 547
 548         write_lock_irqsave(&capi_drivers_list_lock, flags);
 549         list_add_tail(&driver->list, &capi_drivers);
 550         write_unlock_irqrestore(&capi_drivers_list_lock, flags);
 551 }
 552
 553 EXPORT_SYMBOL(register_capi_driver);
 554
 555 /**
 556  * unregister_capi_driver() - unregister CAPI driver
 557  * @driver:     driver descriptor structure.
 558  *
 559  * Called by hardware driver to unregister itself from the CAPI subsystem.
 560  */
 561
 562 void unregister_capi_driver(struct capi_driver *driver)
 563 {
 564         unsigned long flags;
 565
 566         write_lock_irqsave(&capi_drivers_list_lock, flags);
 567         list_del(&driver->list);
 568         write_unlock_irqrestore(&capi_drivers_list_lock, flags);
 569 }
 570
 571 EXPORT_SYMBOL(unregister_capi_driver);
 572
 573 /* ------------------------------------------------------------- */
 574 /* -------- CAPI2.0 Interface ---------------------------------- */
 575 /* ------------------------------------------------------------- */
 576
 577 /**
 578  * capi20_isinstalled() - CAPI 2.0 operation CAPI_INSTALLED
 579  *
 580  * Return value: CAPI result code (CAPI_NOERROR if at least one ISDN controller
 581  *      is ready for use, CAPI_REGNOTINSTALLED otherwise)
 582  */
 583
 584 u16 capi20_isinstalled(void)
 585 {
 586         int i;
 587         for (i = 0; i < CAPI_MAXCONTR; i++) {
 588                 if (capi_cards[i] && capi_cards[i]->cardstate == CARD_RUNNING)
 589                         return CAPI_NOERROR;
 590         }
 591         return CAPI_REGNOTINSTALLED;
 592 }
 593
 594 EXPORT_SYMBOL(capi20_isinstalled);
 595
 596 /**
 597  * capi20_register() - CAPI 2.0 operation CAPI_REGISTER
 598  * @ap:         CAPI application descriptor structure.
 599  *
 600  * Register an application's presence with CAPI.
 601  * A unique application ID is assigned and stored in @ap->applid.
 602  * After this function returns successfully, the message receive
 603  * callback function @ap->recv_message() may be called at any time
 604  * until capi20_release() has been called for the same @ap.
 605  * Return value: CAPI result code
 606  */
 607
 608 u16 capi20_register(struct capi20_appl *ap)
 609 {
 610         int i;
 611         u16 applid;
 612         unsigned long flags;
 613
 614         DBG("");
 615
 616         if (ap->rparam.datablklen < 128)
 617                 return CAPI_LOGBLKSIZETOSMALL;
 618
 619         write_lock_irqsave(&application_lock, flags);
 620
 621         for (applid = 1; applid <= CAPI_MAXAPPL; applid++) {
 622                 if (capi_applications[applid - 1] == NULL)
 623                         break;
 624         }
 625         if (applid > CAPI_MAXAPPL) {
 626                 write_unlock_irqrestore(&application_lock, flags);
 627                 return CAPI_TOOMANYAPPLS;
 628         }
 629
 630         ap->applid = applid;
 631         capi_applications[applid - 1] = ap;
 632
 633         ap->nrecvctlpkt = 0;
 634         ap->nrecvdatapkt = 0;
 635         ap->nsentctlpkt = 0;
 636         ap->nsentdatapkt = 0;
 637         ap->callback = NULL;
 638         mutex_init(&ap->recv_mtx);
 639         skb_queue_head_init(&ap->recv_queue);
 640         INIT_WORK(&ap->recv_work, recv_handler);
 641         ap->release_in_progress = 0;
 642
 643         write_unlock_irqrestore(&application_lock, flags);
 644
 645         mutex_lock(&controller_mutex);
 646         for (i = 0; i < CAPI_MAXCONTR; i++) {
 647                 if (!capi_cards[i] || capi_cards[i]->cardstate != CARD_RUNNING)
 648                         continue;
 649                 register_appl(capi_cards[i], applid, &ap->rparam);
 650         }
 651         mutex_unlock(&controller_mutex);
 652
 653         if (showcapimsgs & 1) {
 654                 printk(KERN_DEBUG "kcapi: appl %d up\n", applid);
 655         }
 656
 657         return CAPI_NOERROR;
 658 }
 659
 660 EXPORT_SYMBOL(capi20_register);
 661
 662 /**
 663  * capi20_release() - CAPI 2.0 operation CAPI_RELEASE
 664  * @ap:         CAPI application descriptor structure.
 665  *
 666  * Terminate an application's registration with CAPI.
 667  * After this function returns successfully, the message receive
 668  * callback function @ap->recv_message() will no longer be called.
 669  * Return value: CAPI result code
 670  */
 671
 672 u16 capi20_release(struct capi20_appl *ap)
 673 {
 674         int i;
 675         unsigned long flags;
 676
 677         DBG("applid %#x", ap->applid);
 678
 679         write_lock_irqsave(&application_lock, flags);
 680         ap->release_in_progress = 1;
 681         capi_applications[ap->applid - 1] = NULL;
 682         write_unlock_irqrestore(&application_lock, flags);
 683
 684         mutex_lock(&controller_mutex);
 685         for (i = 0; i < CAPI_MAXCONTR; i++) {
 686                 if (!capi_cards[i] || capi_cards[i]->cardstate != CARD_RUNNING)
 687                         continue;
 688                 release_appl(capi_cards[i], ap->applid);
 689         }
 690         mutex_unlock(&controller_mutex);
 691
 692         flush_scheduled_work();
 693         skb_queue_purge(&ap->recv_queue);
 694
 695         if (showcapimsgs & 1) {
 696                 printk(KERN_DEBUG "kcapi: appl %d down\n", ap->applid);
 697         }
 698
 699         return CAPI_NOERROR;
 700 }
 701
 702 EXPORT_SYMBOL(capi20_release);
 703
 704 /**
 705  * capi20_put_message() - CAPI 2.0 operation CAPI_PUT_MESSAGE
 706  * @ap:         CAPI application descriptor structure.
 707  * @skb:        CAPI message.
 708  *
 709  * Transfer a single message to CAPI.
 710  * Return value: CAPI result code
 711  */
 712
 713 u16 capi20_put_message(struct capi20_appl *ap, struct sk_buff *skb)
 714 {
 715         struct capi_ctr *card;
 716         int showctl = 0;
 717         u8 cmd, subcmd;
 718
 719         DBG("applid %#x", ap->applid);
 720
 721         if (ncards == 0)
 722                 return CAPI_REGNOTINSTALLED;
 723         if ((ap->applid == 0) || ap->release_in_progress)
 724                 return CAPI_ILLAPPNR;
 725         if (skb->len < 12
 726             || !capi_cmd_valid(CAPIMSG_COMMAND(skb->data))
 727             || !capi_subcmd_valid(CAPIMSG_SUBCOMMAND(skb->data)))
 728                 return CAPI_ILLCMDORSUBCMDORMSGTOSMALL;
 729         card = get_capi_ctr_by_nr(CAPIMSG_CONTROLLER(skb->data));
 730         if (!card || card->cardstate != CARD_RUNNING) {
 731                 card = get_capi_ctr_by_nr(1); // XXX why?
 732                 if (!card || card->cardstate != CARD_RUNNING)
 733                         return CAPI_REGNOTINSTALLED;
 734         }
 735         if (card->blocked)
 736                 return CAPI_SENDQUEUEFULL;
 737
 738         cmd = CAPIMSG_COMMAND(skb->data);
 739         subcmd = CAPIMSG_SUBCOMMAND(skb->data);
 740
 741         if (cmd == CAPI_DATA_B3 && subcmd== CAPI_REQ) {
 742                 card->nsentdatapkt++;
 743                 ap->nsentdatapkt++;
 744                 if (card->traceflag > 2) showctl |= 2;
 745         } else {
 746                 card->nsentctlpkt++;
 747                 ap->nsentctlpkt++;
 748                 if (card->traceflag) showctl |= 2;
 749         }
 750         showctl |= (card->traceflag & 1);
 751         if (showctl & 2) {
 752                 if (showctl & 1) {
 753                         printk(KERN_DEBUG "kcapi: put [%03d] id#%d %s len=%u\n",
 754                                CAPIMSG_CONTROLLER(skb->data),
 755                                CAPIMSG_APPID(skb->data),
 756                                capi_cmd2str(cmd, subcmd),
 757                                CAPIMSG_LEN(skb->data));
 758                 } else {
 759                         _cdebbuf *cdb = capi_message2str(skb->data);
 760                         if (cdb) {
 761                                 printk(KERN_DEBUG "kcapi: put [%03d] %s\n",
 762                                         CAPIMSG_CONTROLLER(skb->data),
 763                                         cdb->buf);
 764                                 cdebbuf_free(cdb);
 765                         } else
 766                                 printk(KERN_DEBUG "kcapi: put [%03d] id#%d %s len=%u cannot trace\n",
 767                                         CAPIMSG_CONTROLLER(skb->data),
 768                                         CAPIMSG_APPID(skb->data),
 769                                         capi_cmd2str(cmd, subcmd),
 770                                         CAPIMSG_LEN(skb->data));
 771                 }
 772         }
 773         return card->send_message(card, skb);
 774 }
 775
 776 EXPORT_SYMBOL(capi20_put_message);
 777
 778 /**
 779  * capi20_get_manufacturer() - CAPI 2.0 operation CAPI_GET_MANUFACTURER
 780  * @contr:      controller number.
 781  * @buf:        result buffer (64 bytes).
 782  *
 783  * Retrieve information about the manufacturer of the specified ISDN controller
 784  * or (for @contr == 0) the driver itself.
 785  * Return value: CAPI result code
 786  */
 787
 788 u16 capi20_get_manufacturer(u32 contr, u8 *buf)
 789 {
 790         struct capi_ctr *card;
 791
 792         if (contr == 0) {
 793                 strlcpy(buf, capi_manufakturer, CAPI_MANUFACTURER_LEN);
 794                 return CAPI_NOERROR;
 795         }
 796         card = get_capi_ctr_by_nr(contr);
 797         if (!card || card->cardstate != CARD_RUNNING)
 798                 return CAPI_REGNOTINSTALLED;
 799         strlcpy(buf, card->manu, CAPI_MANUFACTURER_LEN);
 800         return CAPI_NOERROR;
 801 }
 802
 803 EXPORT_SYMBOL(capi20_get_manufacturer);
 804
 805 /**
 806  * capi20_get_version() - CAPI 2.0 operation CAPI_GET_VERSION
 807  * @contr:      controller number.
 808  * @verp:       result structure.
 809  *
 810  * Retrieve version information for the specified ISDN controller
 811  * or (for @contr == 0) the driver itself.
 812  * Return value: CAPI result code
 813  */
 814
 815 u16 capi20_get_version(u32 contr, struct capi_version *verp)
 816 {
 817         struct capi_ctr *card;
 818
 819         if (contr == 0) {
 820                 *verp = driver_version;
 821                 return CAPI_NOERROR;
 822         }
 823         card = get_capi_ctr_by_nr(contr);
 824         if (!card || card->cardstate != CARD_RUNNING)
 825                 return CAPI_REGNOTINSTALLED;
 826
 827         memcpy((void *) verp, &card->version, sizeof(capi_version));
 828         return CAPI_NOERROR;
 829 }
 830
 831 EXPORT_SYMBOL(capi20_get_version);
 832
 833 /**
 834  * capi20_get_serial() - CAPI 2.0 operation CAPI_GET_SERIAL_NUMBER
 835  * @contr:      controller number.
 836  * @serial:     result buffer (8 bytes).
 837  *
 838  * Retrieve the serial number of the specified ISDN controller
 839  * or (for @contr == 0) the driver itself.
 840  * Return value: CAPI result code
 841  */
 842
 843 u16 capi20_get_serial(u32 contr, u8 *serial)
 844 {
 845         struct capi_ctr *card;
 846
 847         if (contr == 0) {
 848                 strlcpy(serial, driver_serial, CAPI_SERIAL_LEN);
 849                 return CAPI_NOERROR;
 850         }
 851         card = get_capi_ctr_by_nr(contr);
 852         if (!card || card->cardstate != CARD_RUNNING)
 853                 return CAPI_REGNOTINSTALLED;
 854
 855         strlcpy((void *) serial, card->serial, CAPI_SERIAL_LEN);
 856         return CAPI_NOERROR;
 857 }
 858
 859 EXPORT_SYMBOL(capi20_get_serial);
 860
 861 /**
 862  * capi20_get_profile() - CAPI 2.0 operation CAPI_GET_PROFILE
 863  * @contr:      controller number.
 864  * @profp:      result structure.
 865  *
 866  * Retrieve capability information for the specified ISDN controller
 867  * or (for @contr == 0) the number of installed controllers.
 868  * Return value: CAPI result code
 869  */
 870
 871 u16 capi20_get_profile(u32 contr, struct capi_profile *profp)
 872 {
 873         struct capi_ctr *card;
 874
 875         if (contr == 0) {
 876                 profp->ncontroller = ncards;
 877                 return CAPI_NOERROR;
 878         }
 879         card = get_capi_ctr_by_nr(contr);
 880         if (!card || card->cardstate != CARD_RUNNING)
 881                 return CAPI_REGNOTINSTALLED;
 882
 883         memcpy((void *) profp, &card->profile,
 884                         sizeof(struct capi_profile));
 885         return CAPI_NOERROR;
 886 }
 887
 888 EXPORT_SYMBOL(capi20_get_profile);
 889
 890 #ifdef AVMB1_COMPAT
 891 static int old_capi_manufacturer(unsigned int cmd, void __user *data)
 892 {
 893         avmb1_loadandconfigdef ldef;
 894         avmb1_extcarddef cdef;
 895         avmb1_resetdef rdef;
 896         capicardparams cparams;
 897         struct capi_ctr *card;
 898         struct capi_driver *driver = NULL;
 899         capiloaddata ldata;
 900         struct list_head *l;
 901         unsigned long flags;
 902         int retval;
 903
 904         switch (cmd) {
 905         case AVMB1_ADDCARD:
 906         case AVMB1_ADDCARD_WITH_TYPE:
 907                 if (cmd == AVMB1_ADDCARD) {
 908                    if ((retval = copy_from_user(&cdef, data,
 909                                             sizeof(avmb1_carddef))))
 910                            return retval;
 911                    cdef.cardtype = AVM_CARDTYPE_B1;
 912                 } else {
 913                    if ((retval = copy_from_user(&cdef, data,
 914                                             sizeof(avmb1_extcarddef))))
 915                            return retval;
 916                 }
 917                 cparams.port = cdef.port;
 918                 cparams.irq = cdef.irq;
 919                 cparams.cardnr = cdef.cardnr;
 920
 921                 read_lock_irqsave(&capi_drivers_list_lock, flags);
 922                 switch (cdef.cardtype) {
 923                         case AVM_CARDTYPE_B1:
 924                                 list_for_each(l, &capi_drivers) {
 925                                         driver = list_entry(l, struct capi_driver, list);
 926                                         if (strcmp(driver->name, "b1isa") == 0)
 927                                                 break;
 928                                 }
 929                                 break;
 930                         case AVM_CARDTYPE_T1:
 931                                 list_for_each(l, &capi_drivers) {
 932                                         driver = list_entry(l, struct capi_driver, list);
 933                                         if (strcmp(driver->name, "t1isa") == 0)
 934                                                 break;
 935                                 }
 936                                 break;
 937                         default:
 938                                 driver = NULL;
 939                                 break;
 940                 }
 941                 if (!driver) {
 942                         read_unlock_irqrestore(&capi_drivers_list_lock, flags);
 943                         printk(KERN_ERR "kcapi: driver not loaded.\n");
 944                         return -EIO;
 945                 }
 946                 if (!driver->add_card) {
 947                         read_unlock_irqrestore(&capi_drivers_list_lock, flags);
 948                         printk(KERN_ERR "kcapi: driver has no add card function.\n");
 949                         return -EIO;
 950                 }
 951
 952                 retval = driver->add_card(driver, &cparams);
 953                 read_unlock_irqrestore(&capi_drivers_list_lock, flags);
 954                 return retval;
 955
 956         case AVMB1_LOAD:
 957         case AVMB1_LOAD_AND_CONFIG:
 958
 959                 if (cmd == AVMB1_LOAD) {
 960                         if (copy_from_user(&ldef, data,
 961                                            sizeof(avmb1_loaddef)))
 962                                 return -EFAULT;
 963                         ldef.t4config.len = 0;
 964                         ldef.t4config.data = NULL;
 965                 } else {
 966                         if (copy_from_user(&ldef, data,
 967                                            sizeof(avmb1_loadandconfigdef)))
 968                                 return -EFAULT;
 969                 }
 970                 card = get_capi_ctr_by_nr(ldef.contr);
 971                 if (!card)
 972                         return -EINVAL;
 973                 card = capi_ctr_get(card);
 974                 if (!card)
 975                         return -ESRCH;
 976                 if (card->load_firmware == NULL) {
 977                         printk(KERN_DEBUG "kcapi: load: no load function\n");
 978                         capi_ctr_put(card);
 979                         return -ESRCH;
 980                 }
 981
 982                 if (ldef.t4file.len <= 0) {
 983                         printk(KERN_DEBUG "kcapi: load: invalid parameter: length of t4file is %d ?\n", ldef.t4file.len);
 984                         capi_ctr_put(card);
 985                         return -EINVAL;
 986                 }
 987                 if (ldef.t4file.data == NULL) {
 988                         printk(KERN_DEBUG "kcapi: load: invalid parameter: dataptr is 0\n");
 989                         capi_ctr_put(card);
 990                         return -EINVAL;
 991                 }
 992
 993                 ldata.firmware.user = 1;
 994                 ldata.firmware.data = ldef.t4file.data;
 995                 ldata.firmware.len = ldef.t4file.len;
 996                 ldata.configuration.user = 1;
 997                 ldata.configuration.data = ldef.t4config.data;
 998                 ldata.configuration.len = ldef.t4config.len;
 999
1000                 if (card->cardstate != CARD_DETECTED) {
1001                         printk(KERN_INFO "kcapi: load: contr=%d not in detect state\n", ldef.contr);
1002                         capi_ctr_put(card);
1003                         return -EBUSY;
1004                 }
1005                 card->cardstate = CARD_LOADING;
1006
1007                 retval = card->load_firmware(card, &ldata);
1008
1009                 if (retval) {
1010                         card->cardstate = CARD_DETECTED;
1011                         capi_ctr_put(card);
1012                         return retval;
1013                 }
1014
1015                 while (card->cardstate != CARD_RUNNING) {
1016
1017                         msleep_interruptible(100);      /* 0.1 sec */
1018
1019                         if (signal_pending(current)) {
1020                                 capi_ctr_put(card);
1021                                 return -EINTR;
1022                         }
1023                 }
1024                 capi_ctr_put(card);
1025                 return 0;
1026
1027         case AVMB1_RESETCARD:
1028                 if (copy_from_user(&rdef, data, sizeof(avmb1_resetdef)))
1029                         return -EFAULT;
1030                 card = get_capi_ctr_by_nr(rdef.contr);
1031                 if (!card)
1032                         return -ESRCH;
1033
1034                 if (card->cardstate == CARD_DETECTED)
1035                         return 0;
1036
1037                 card->reset_ctr(card);
1038
1039                 while (card->cardstate > CARD_DETECTED) {
1040
1041                         msleep_interruptible(100);      /* 0.1 sec */
1042
1043                         if (signal_pending(current))
1044                                 return -EINTR;
1045                 }
1046                 return 0;
1047
1048         }
1049         return -EINVAL;
1050 }
1051 #endif
1052
1053 /**
1054  * capi20_manufacturer() - CAPI 2.0 operation CAPI_MANUFACTURER
1055  * @cmd:        command.
1056  * @data:       parameter.
1057  *
1058  * Perform manufacturer specific command.
1059  * Return value: CAPI result code
1060  */
1061
1062 int capi20_manufacturer(unsigned int cmd, void __user *data)
1063 {
1064         struct capi_ctr *card;
1065
1066         switch (cmd) {
1067 #ifdef AVMB1_COMPAT
1068         case AVMB1_LOAD:
1069         case AVMB1_LOAD_AND_CONFIG:
1070         case AVMB1_RESETCARD:
1071         case AVMB1_GET_CARDINFO:
1072         case AVMB1_REMOVECARD:
1073                 return old_capi_manufacturer(cmd, data);
1074 #endif
1075         case KCAPI_CMD_TRACE:
1076         {
1077                 kcapi_flagdef fdef;
1078
1079                 if (copy_from_user(&fdef, data, sizeof(kcapi_flagdef)))
1080                         return -EFAULT;
1081
1082                 card = get_capi_ctr_by_nr(fdef.contr);
1083                 if (!card)
1084                         return -ESRCH;
1085
1086                 card->traceflag = fdef.flag;
1087                 printk(KERN_INFO "kcapi: contr [%03d] set trace=%d\n",
1088                         card->cnr, card->traceflag);
1089                 return 0;
1090         }
1091         case KCAPI_CMD_ADDCARD:
1092         {
1093                 struct list_head *l;
1094                 struct capi_driver *driver = NULL;
1095                 capicardparams cparams;
1096                 kcapi_carddef cdef;
1097                 int retval;
1098
1099                 if ((retval = copy_from_user(&cdef, data, sizeof(cdef))))
1100                         return retval;
1101
1102                 cparams.port = cdef.port;
1103                 cparams.irq = cdef.irq;
1104                 cparams.membase = cdef.membase;
1105                 cparams.cardnr = cdef.cardnr;
1106                 cparams.cardtype = 0;
1107                 cdef.driver[sizeof(cdef.driver)-1] = 0;
1108
1109                 list_for_each(l, &capi_drivers) {
1110                         driver = list_entry(l, struct capi_driver, list);
1111                         if (strcmp(driver->name, cdef.driver) == 0)
1112                                 break;
1113                 }
1114                 if (driver == NULL) {
1115                         printk(KERN_ERR "kcapi: driver \"%s\" not loaded.\n",
1116                                         cdef.driver);
1117                         return -ESRCH;
1118                 }
1119
1120                 if (!driver->add_card) {
1121                         printk(KERN_ERR "kcapi: driver \"%s\" has no add card function.\n", cdef.driver);
1122                         return -EIO;
1123                 }
1124
1125                 return driver->add_card(driver, &cparams);
1126         }
1127
1128         default:
1129                 printk(KERN_ERR "kcapi: manufacturer command %d unknown.\n",
1130                                         cmd);
1131                 break;
1132
1133         }
1134         return -EINVAL;
1135 }
1136
1137 EXPORT_SYMBOL(capi20_manufacturer);
1138
1139 /* temporary hack */
1140
1141 /**
1142  * capi20_set_callback() - set CAPI application notification callback function
1143  * @ap:         CAPI application descriptor structure.
1144  * @callback:   callback function (NULL to remove).
1145  *
1146  * If not NULL, the callback function will be called to notify the
1147  * application of the addition or removal of a controller.
1148  * The first argument (cmd) will tell whether the controller was added
1149  * (KCI_CONTRUP) or removed (KCI_CONTRDOWN).
1150  * The second argument (contr) will be the controller number.
1151  * For cmd==KCI_CONTRUP the third argument (data) will be a pointer to the
1152  * new controller's capability profile structure.
1153  */
1154
1155 void capi20_set_callback(struct capi20_appl *ap,
1156                          void (*callback) (unsigned int cmd, __u32 contr, void *data))
1157 {
1158         ap->callback = callback;
1159 }
1160
1161 EXPORT_SYMBOL(capi20_set_callback);
1162
1163 /* ------------------------------------------------------------- */
1164 /* -------- Init & Cleanup ------------------------------------- */
1165 /* ------------------------------------------------------------- */
1166
1167 /*
1168  * init / exit functions
1169  */
1170
1171 static int __init kcapi_init(void)
1172 {
1173         char *p;
1174         char rev[32];
1175         int ret;
1176
1177         ret = cdebug_init();
1178         if (ret)
1179                 return ret;
1180         kcapi_proc_init();
1181
1182         if ((p = strchr(revision, ':')) != NULL && p[1]) {
1183                 strlcpy(rev, p + 2, sizeof(rev));
1184                 if ((p = strchr(rev, '$')) != NULL && p > rev)
1185                    *(p-1) = 0;
1186         } else
1187                 strcpy(rev, "1.0");
1188
1189         printk(KERN_NOTICE "CAPI Subsystem Rev %s\n", rev);
1190
1191         return 0;
1192 }
1193
1194 static void __exit kcapi_exit(void)
1195 {
1196         kcapi_proc_exit();
1197
1198         /* make sure all notifiers are finished */
1199         flush_scheduled_work();
1200         cdebug_exit();
1201 }
1202
1203 module_init(kcapi_init);
1204 module_exit(kcapi_exit);