drivers/isdn/pcbit/drv.c

   1 /*
   2  * PCBIT-D interface with isdn4linux
   3  *
   4  * Copyright (C) 1996 Universidade de Lisboa
   5  *
   6  * Written by Pedro Roque Marques (roque@di.fc.ul.pt)
   7  *
   8  * This software may be used and distributed according to the terms of
   9  * the GNU General Public License, incorporated herein by reference.
  10  */
  11
  12 /*
  13  *      Fixes:
  14  *
  15  *      Nuno Grilo      <l38486@alfa.ist.utl.pt>
  16  *      fixed msn_list NULL pointer dereference.
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21
  22 #include <linux/sched.h>
  23
  24 #include <linux/kernel.h>
  25
  26 #include <linux/types.h>
  27 #include <linux/slab.h>
  28 #include <linux/mm.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/string.h>
  31 #include <linux/skbuff.h>
  32
  33 #include <linux/isdnif.h>
  34 #include <asm/string.h>
  35 #include <asm/io.h>
  36 #include <linux/ioport.h>
  37
  38 #include "pcbit.h"
  39 #include "edss1.h"
  40 #include "layer2.h"
  41 #include "capi.h"
  42
  43
  44 extern ushort last_ref_num;
  45
  46 static int pcbit_ioctl(isdn_ctrl* ctl);
  47
  48 static char* pcbit_devname[MAX_PCBIT_CARDS] = {
  49         "pcbit0",
  50         "pcbit1",
  51         "pcbit2",
  52         "pcbit3"
  53 };
  54
  55 /*
  56  * prototypes
  57  */
  58
  59 int pcbit_command(isdn_ctrl* ctl);
  60 int pcbit_stat(u_char __user * buf, int len, int, int);
  61 int pcbit_xmit(int driver, int chan, int ack, struct sk_buff *skb);
  62 int pcbit_writecmd(const u_char __user *, int, int, int);
  63
  64 static int set_protocol_running(struct pcbit_dev * dev);
  65
  66 static void pcbit_clear_msn(struct pcbit_dev *dev);
  67 static void pcbit_set_msn(struct pcbit_dev *dev, char *list);
  68 static int pcbit_check_msn(struct pcbit_dev *dev, char *msn);
  69
  70
  71 extern void pcbit_deliver(void * data);
  72
  73 int pcbit_init_dev(int board, int mem_base, int irq)
  74 {
  75         struct pcbit_dev *dev;
  76         isdn_if *dev_if;
  77
  78         if ((dev=kmalloc(sizeof(struct pcbit_dev), GFP_KERNEL)) == NULL)
  79         {
  80                 printk("pcbit_init: couldn't malloc pcbit_dev struct\n");
  81                 return -ENOMEM;
  82         }
  83
  84         dev_pcbit[board] = dev;
  85         memset(dev, 0, sizeof(struct pcbit_dev));
  86         init_waitqueue_head(&dev->set_running_wq);
  87         spin_lock_init(&dev->lock);
  88
  89         if (mem_base >= 0xA0000 && mem_base <= 0xFFFFF ) {
  90                 dev->ph_mem = mem_base;
  91                 if (!request_mem_region(dev->ph_mem, 4096, "PCBIT mem")) {
  92                         printk(KERN_WARNING
  93                                 "PCBIT: memory region %lx-%lx already in use\n",
  94                                 dev->ph_mem, dev->ph_mem + 4096);
  95                         kfree(dev);
  96                         dev_pcbit[board] = NULL;
  97                         return -EACCES;
  98                 }
  99                 dev->sh_mem = ioremap(dev->ph_mem, 4096);
 100         }
 101         else
 102         {
 103                 printk("memory address invalid");
 104                 kfree(dev);
 105                 dev_pcbit[board] = NULL;
 106                 return -EACCES;
 107         }
 108
 109         dev->b1 = kmalloc(sizeof(struct pcbit_chan), GFP_KERNEL);
 110         if (!dev->b1) {
 111                 printk("pcbit_init: couldn't malloc pcbit_chan struct\n");
 112                 iounmap(dev->sh_mem);
 113                 release_mem_region(dev->ph_mem, 4096);
 114                 kfree(dev);
 115                 return -ENOMEM;
 116         }
 117
 118         dev->b2 = kmalloc(sizeof(struct pcbit_chan), GFP_KERNEL);
 119         if (!dev->b2) {
 120                 printk("pcbit_init: couldn't malloc pcbit_chan struct\n");
 121                 kfree(dev->b1);
 122                 iounmap(dev->sh_mem);
 123                 release_mem_region(dev->ph_mem, 4096);
 124                 kfree(dev);
 125                 return -ENOMEM;
 126         }
 127
 128         memset(dev->b1, 0, sizeof(struct pcbit_chan));
 129         memset(dev->b2, 0, sizeof(struct pcbit_chan));
 130         dev->b2->id = 1;
 131
 132         INIT_WORK(&dev->qdelivery, pcbit_deliver, dev);
 133
 134         /*
 135          *  interrupts
 136          */
 137
 138         if (request_irq(irq, &pcbit_irq_handler, 0, pcbit_devname[board], dev) != 0)
 139         {
 140                 kfree(dev->b1);
 141                 kfree(dev->b2);
 142                 iounmap(dev->sh_mem);
 143                 release_mem_region(dev->ph_mem, 4096);
 144                 kfree(dev);
 145                 dev_pcbit[board] = NULL;
 146                 return -EIO;
 147         }
 148
 149         dev->irq = irq;
 150
 151         /* next frame to be received */
 152         dev->rcv_seq = 0;
 153         dev->send_seq = 0;
 154         dev->unack_seq = 0;
 155
 156         dev->hl_hdrlen = 16;
 157
 158         dev_if = kmalloc(sizeof(isdn_if), GFP_KERNEL);
 159
 160         if (!dev_if) {
 161                 free_irq(irq, dev);
 162                 kfree(dev->b1);
 163                 kfree(dev->b2);
 164                 iounmap(dev->sh_mem);
 165                 release_mem_region(dev->ph_mem, 4096);
 166                 kfree(dev);
 167                 dev_pcbit[board] = NULL;
 168                 return -EIO;
 169         }
 170
 171         dev->dev_if = dev_if;
 172
 173         dev_if->owner = THIS_MODULE;
 174
 175         dev_if->channels = 2;
 176
 177         dev_if->features = (ISDN_FEATURE_P_EURO  | ISDN_FEATURE_L3_TRANS |
 178                             ISDN_FEATURE_L2_HDLC | ISDN_FEATURE_L2_TRANS );
 179
 180         dev_if->writebuf_skb = pcbit_xmit;
 181         dev_if->hl_hdrlen = 16;
 182
 183         dev_if->maxbufsize = MAXBUFSIZE;
 184         dev_if->command  = pcbit_command;
 185
 186         dev_if->writecmd = pcbit_writecmd;
 187         dev_if->readstat = pcbit_stat;
 188
 189
 190         strcpy(dev_if->id, pcbit_devname[board]);
 191
 192         if (!register_isdn(dev_if)) {
 193                 free_irq(irq, dev);
 194                 kfree(dev->b1);
 195                 kfree(dev->b2);
 196                 iounmap(dev->sh_mem);
 197                 release_mem_region(dev->ph_mem, 4096);
 198                 kfree(dev);
 199                 dev_pcbit[board] = NULL;
 200                 return -EIO;
 201         }
 202
 203         dev->id = dev_if->channels;
 204
 205
 206         dev->l2_state = L2_DOWN;
 207         dev->free = 511;
 208
 209         /*
 210          * set_protocol_running(dev);
 211          */
 212
 213         return 0;
 214 }
 215
 216 #ifdef MODULE
 217 void pcbit_terminate(int board)
 218 {
 219         struct pcbit_dev * dev;
 220
 221         dev = dev_pcbit[board];
 222
 223         if (dev) {
 224              /* unregister_isdn(dev->dev_if); */
 225                 free_irq(dev->irq, dev);
 226                 pcbit_clear_msn(dev);
 227                 kfree(dev->dev_if);
 228                 if (dev->b1->fsm_timer.function)
 229                         del_timer(&dev->b1->fsm_timer);
 230                 if (dev->b2->fsm_timer.function)
 231                         del_timer(&dev->b2->fsm_timer);
 232                 kfree(dev->b1);
 233                 kfree(dev->b2);
 234                 iounmap(dev->sh_mem);
 235                 release_mem_region(dev->ph_mem, 4096);
 236                 kfree(dev);
 237         }
 238 }
 239 #endif
 240
 241 int pcbit_command(isdn_ctrl* ctl)
 242 {
 243         struct pcbit_dev  *dev;
 244         struct pcbit_chan *chan;
 245         struct callb_data info;
 246
 247         dev = finddev(ctl->driver);
 248
 249         if (!dev)
 250         {
 251                 printk("pcbit_command: unknown device\n");
 252                 return -1;
 253         }
 254
 255         chan = (ctl->arg & 0x0F) ? dev->b2 : dev->b1;
 256
 257
 258         switch(ctl->command) {
 259         case ISDN_CMD_IOCTL:
 260                 return pcbit_ioctl(ctl);
 261                 break;
 262         case ISDN_CMD_DIAL:
 263                 info.type = EV_USR_SETUP_REQ;
 264                 info.data.setup.CalledPN = (char *) &ctl->parm.setup.phone;
 265                 pcbit_fsm_event(dev, chan, EV_USR_SETUP_REQ, &info);
 266                 break;
 267         case ISDN_CMD_ACCEPTD:
 268                 pcbit_fsm_event(dev, chan, EV_USR_SETUP_RESP, NULL);
 269                 break;
 270         case ISDN_CMD_ACCEPTB:
 271                 printk("ISDN_CMD_ACCEPTB - not really needed\n");
 272                 break;
 273         case ISDN_CMD_HANGUP:
 274                 pcbit_fsm_event(dev, chan, EV_USR_RELEASE_REQ, NULL);
 275                 break;
 276         case ISDN_CMD_SETL2:
 277                 chan->proto = (ctl->arg >> 8);
 278                 break;
 279         case ISDN_CMD_CLREAZ:
 280                 pcbit_clear_msn(dev);
 281                 break;
 282         case ISDN_CMD_SETEAZ:
 283                 pcbit_set_msn(dev, ctl->parm.num);
 284                 break;
 285         case ISDN_CMD_SETL3:
 286                 if ((ctl->arg >> 8) != ISDN_PROTO_L3_TRANS)
 287                         printk(KERN_DEBUG "L3 protocol unknown\n");
 288                 break;
 289         default:
 290                 printk(KERN_DEBUG "pcbit_command: unknown command\n");
 291                 break;
 292         };
 293
 294         return 0;
 295 }
 296
 297 /*
 298  * Another Hack :-(
 299  * on some conditions the board stops sending TDATA_CONFs
 300  * let's see if we can turn around the problem
 301  */
 302
 303 #ifdef BLOCK_TIMER
 304 static void pcbit_block_timer(unsigned long data)
 305 {
 306         struct pcbit_chan *chan;
 307         struct pcbit_dev * dev;
 308         isdn_ctrl ictl;
 309
 310         chan = (struct pcbit_chan *) data;
 311
 312         dev = chan2dev(chan);
 313
 314         if (dev == NULL) {
 315                 printk(KERN_DEBUG "pcbit: chan2dev failed\n");
 316                 return;
 317         }
 318
 319         del_timer(&chan->block_timer);
 320         chan->block_timer.function = NULL;
 321
 322 #ifdef DEBUG
 323         printk(KERN_DEBUG "pcbit_block_timer\n");
 324 #endif
 325         chan->queued = 0;
 326         ictl.driver = dev->id;
 327         ictl.command = ISDN_STAT_BSENT;
 328         ictl.arg = chan->id;
 329         dev->dev_if->statcallb(&ictl);
 330 }
 331 #endif
 332
 333 int pcbit_xmit(int driver, int chnum, int ack, struct sk_buff *skb)
 334 {
 335         ushort hdrlen;
 336         int refnum, len;
 337         struct pcbit_chan * chan;
 338         struct pcbit_dev *dev;
 339
 340         dev = finddev(driver);
 341         if (dev == NULL)
 342         {
 343                 printk("finddev returned NULL");
 344                 return -1;
 345         }
 346
 347         chan = chnum ? dev->b2 : dev->b1;
 348
 349
 350         if (chan->fsm_state != ST_ACTIVE)
 351                 return -1;
 352
 353         if (chan->queued >= MAX_QUEUED )
 354         {
 355 #ifdef DEBUG_QUEUE
 356                 printk(KERN_DEBUG
 357                        "pcbit: %d packets already in queue - write fails\n",
 358                        chan->queued);
 359 #endif
 360                 /*
 361                  * packet stays on the head of the device queue
 362                  * since dev_start_xmit will fail
 363                  * see net/core/dev.c
 364                  */
 365 #ifdef BLOCK_TIMER
 366                 if (chan->block_timer.function == NULL) {
 367                         init_timer(&chan->block_timer);
 368                         chan->block_timer.function =  &pcbit_block_timer;
 369                         chan->block_timer.data = (long) chan;
 370                         chan->block_timer.expires = jiffies + 1 * HZ;
 371                         add_timer(&chan->block_timer);
 372                 }
 373 #endif
 374                 return 0;
 375         }
 376
 377
 378         chan->queued++;
 379
 380         len = skb->len;
 381
 382         hdrlen = capi_tdata_req(chan, skb);
 383
 384         refnum = last_ref_num++ & 0x7fffU;
 385         chan->s_refnum = refnum;
 386
 387         pcbit_l2_write(dev, MSG_TDATA_REQ, refnum, skb, hdrlen);
 388
 389         return len;
 390 }
 391
 392 int pcbit_writecmd(const u_char __user *buf, int len, int driver, int channel)
 393 {
 394         struct pcbit_dev * dev;
 395         int i, j;
 396         const u_char * loadbuf;
 397         u_char * ptr = NULL;
 398         u_char *cbuf;
 399
 400         int errstat;
 401
 402         dev = finddev(driver);
 403
 404         if (!dev)
 405         {
 406                 printk("pcbit_writecmd: couldn't find device");
 407                 return -ENODEV;
 408         }
 409
 410         switch(dev->l2_state) {
 411         case L2_LWMODE:
 412                 /* check (size <= rdp_size); write buf into board */
 413                 if (len < 0 || len > BANK4 + 1 || len > 1024)
 414                 {
 415                         printk("pcbit_writecmd: invalid length %d\n", len);
 416                         return -EINVAL;
 417                 }
 418
 419                 cbuf = kmalloc(len, GFP_KERNEL);
 420                 if (!cbuf)
 421                         return -ENOMEM;
 422
 423                 if (copy_from_user(cbuf, buf, len)) {
 424                         kfree(cbuf);
 425                         return -EFAULT;
 426                 }
 427                 memcpy_toio(dev->sh_mem, cbuf, len);
 428                 kfree(cbuf);
 429                 return len;
 430         case L2_FWMODE:
 431                 /* this is the hard part */
 432                 /* dumb board */
 433                 /* get it into kernel space */
 434                 if ((ptr = kmalloc(len, GFP_KERNEL))==NULL)
 435                         return -ENOMEM;
 436                 if (copy_from_user(ptr, buf, len)) {
 437                         kfree(ptr);
 438                         return -EFAULT;
 439                 }
 440                 loadbuf = ptr;
 441
 442                 errstat = 0;
 443
 444                 for (i=0; i < len; i++)
 445                 {
 446                         for(j=0; j < LOAD_RETRY; j++)
 447                                 if (!(readb(dev->sh_mem + dev->loadptr)))
 448                                         break;
 449
 450                         if (j == LOAD_RETRY)
 451                         {
 452                                 errstat = -ETIME;
 453                                 printk("TIMEOUT i=%d\n", i);
 454                                 break;
 455                         }
 456                         writeb(loadbuf[i], dev->sh_mem + dev->loadptr + 1);
 457                         writeb(0x01, dev->sh_mem + dev->loadptr);
 458
 459                         dev->loadptr += 2;
 460                         if (dev->loadptr > LOAD_ZONE_END)
 461                                 dev->loadptr = LOAD_ZONE_START;
 462                 }
 463                 kfree(ptr);
 464
 465                 return errstat ? errstat : len;
 466         default:
 467                 return -EBUSY;
 468         }
 469 }
 470
 471 /*
 472  *  demultiplexing of messages
 473  *
 474  */
 475
 476 void pcbit_l3_receive(struct pcbit_dev * dev, ulong msg,
 477                              struct sk_buff * skb,
 478                              ushort hdr_len, ushort refnum)
 479 {
 480         struct pcbit_chan *chan;
 481         struct sk_buff *skb2;
 482         unsigned short len;
 483         struct callb_data cbdata;
 484         int complete, err;
 485         isdn_ctrl ictl;
 486
 487         switch(msg) {
 488
 489         case MSG_TDATA_IND:
 490                 if (!(chan = capi_channel(dev, skb))) {
 491                         printk(KERN_WARNING
 492                                "CAPI header: unknown channel id\n");
 493                         break;
 494                 }
 495                 chan->r_refnum = skb->data[7];
 496                 skb_pull(skb, 8);
 497
 498                 dev->dev_if->rcvcallb_skb(dev->id, chan->id, skb);
 499
 500                 if (capi_tdata_resp(chan, &skb2) > 0)
 501                         pcbit_l2_write(dev, MSG_TDATA_RESP, refnum,
 502                                        skb2, skb2->len);
 503                 return;
 504                 break;
 505         case MSG_TDATA_CONF:
 506                 if (!(chan = capi_channel(dev, skb))) {
 507                         printk(KERN_WARNING
 508                                "CAPI header: unknown channel id\n");
 509                         break;
 510                 }
 511
 512 #ifdef DEBUG
 513                 if ( (*((ushort *) (skb->data + 2) )) != 0) {
 514                         printk(KERN_DEBUG "TDATA_CONF error\n");
 515                 }
 516 #endif
 517 #ifdef BLOCK_TIMER
 518                 if (chan->queued == MAX_QUEUED) {
 519                         del_timer(&chan->block_timer);
 520                         chan->block_timer.function = NULL;
 521                 }
 522
 523 #endif
 524                 chan->queued--;
 525
 526                 ictl.driver = dev->id;
 527                 ictl.command = ISDN_STAT_BSENT;
 528                 ictl.arg = chan->id;
 529                 dev->dev_if->statcallb(&ictl);
 530                 break;
 531
 532         case MSG_CONN_IND:
 533                 /*
 534                  *  channel: 1st not used will do
 535                  *           if both are used we're in trouble
 536                  */
 537
 538                 if (!dev->b1->fsm_state)
 539                         chan = dev->b1;
 540                 else if (!dev->b2->fsm_state)
 541                         chan = dev->b2;
 542                 else {
 543                         printk(KERN_INFO
 544                                "Incoming connection: no channels available");
 545
 546                         if ((len = capi_disc_req(*(ushort*)(skb->data), &skb2, CAUSE_NOCHAN)) > 0)
 547                                 pcbit_l2_write(dev, MSG_DISC_REQ, refnum, skb2, len);
 548                         break;
 549                 }
 550
 551                 cbdata.data.setup.CalledPN = NULL;
 552                 cbdata.data.setup.CallingPN = NULL;
 553
 554                 capi_decode_conn_ind(chan, skb, &cbdata);
 555                 cbdata.type = EV_NET_SETUP;
 556
 557                 pcbit_fsm_event(dev, chan, EV_NET_SETUP, NULL);
 558
 559                 if (pcbit_check_msn(dev, cbdata.data.setup.CallingPN))
 560                         pcbit_fsm_event(dev, chan, EV_USR_PROCED_REQ, &cbdata);
 561                 else
 562                         pcbit_fsm_event(dev, chan, EV_USR_RELEASE_REQ, NULL);
 563
 564                 if (cbdata.data.setup.CalledPN)
 565                         kfree(cbdata.data.setup.CalledPN);
 566                 if (cbdata.data.setup.CallingPN)
 567                         kfree(cbdata.data.setup.CallingPN);
 568                 break;
 569
 570         case MSG_CONN_CONF:
 571                 /*
 572                  * We should be able to find the channel by the message
 573                  * reference number. The current version of the firmware
 574                  * doesn't sent the ref number correctly.
 575                  */
 576 #ifdef DEBUG
 577                 printk(KERN_DEBUG "refnum=%04x b1=%04x b2=%04x\n", refnum,
 578                        dev->b1->s_refnum,
 579                        dev->b2->s_refnum);
 580 #endif
 581                 /* We just try to find a channel in the right state */
 582
 583                 if (dev->b1->fsm_state == ST_CALL_INIT)
 584                         chan = dev->b1;
 585                 else {
 586                         if (dev->b2->s_refnum == ST_CALL_INIT)
 587                                 chan = dev->b2;
 588                         else {
 589                                 chan = NULL;
 590                                 printk(KERN_WARNING "Connection Confirm - no channel in Call Init state\n");
 591                                 break;
 592                         }
 593                 }
 594                 if (capi_decode_conn_conf(chan, skb, &complete)) {
 595                         printk(KERN_DEBUG "conn_conf indicates error\n");
 596                         pcbit_fsm_event(dev, chan, EV_ERROR, NULL);
 597                 }
 598                 else
 599                         if (complete)
 600                                 pcbit_fsm_event(dev, chan, EV_NET_CALL_PROC, NULL);
 601                         else
 602                                 pcbit_fsm_event(dev, chan, EV_NET_SETUP_ACK, NULL);
 603                 break;
 604         case MSG_CONN_ACTV_IND:
 605
 606                 if (!(chan = capi_channel(dev, skb))) {
 607                         printk(KERN_WARNING
 608                                "CAPI header: unknown channel id\n");
 609                         break;
 610                 }
 611
 612                 if (capi_decode_conn_actv_ind(chan, skb)) {
 613                         printk("error in capi_decode_conn_actv_ind\n");
 614                      /* pcbit_fsm_event(dev, chan, EV_ERROR, NULL); */
 615                         break;
 616                 }
 617                 chan->r_refnum = refnum;
 618                 pcbit_fsm_event(dev, chan, EV_NET_CONN, NULL);
 619                 break;
 620         case MSG_CONN_ACTV_CONF:
 621
 622                 if (!(chan = capi_channel(dev, skb))) {
 623                         printk(KERN_WARNING
 624                                "CAPI header: unknown channel id\n");
 625                         break;
 626                 }
 627
 628                 if (capi_decode_conn_actv_conf(chan, skb) == 0)
 629                         pcbit_fsm_event(dev, chan, EV_NET_CONN_ACK, NULL);
 630
 631                 else
 632                         printk(KERN_DEBUG "decode_conn_actv_conf failed\n");
 633                 break;
 634
 635         case  MSG_SELP_CONF:
 636
 637                 if (!(chan = capi_channel(dev, skb))) {
 638                         printk(KERN_WARNING
 639                                "CAPI header: unknown channel id\n");
 640                         break;
 641                 }
 642
 643                 if (!(err = capi_decode_sel_proto_conf(chan, skb)))
 644                         pcbit_fsm_event(dev, chan, EV_NET_SELP_RESP, NULL);
 645                 else {
 646                         /* Error */
 647                         printk("error %d - capi_decode_sel_proto_conf\n", err);
 648                 }
 649                 break;
 650         case MSG_ACT_TRANSP_CONF:
 651                 if (!(chan = capi_channel(dev, skb))) {
 652                         printk(KERN_WARNING
 653                                "CAPI header: unknown channel id\n");
 654                         break;
 655                 }
 656
 657                 if (!capi_decode_actv_trans_conf(chan, skb))
 658                         pcbit_fsm_event(dev, chan, EV_NET_ACTV_RESP, NULL);
 659                 break;
 660
 661         case MSG_DISC_IND:
 662
 663                 if (!(chan = capi_channel(dev, skb))) {
 664                         printk(KERN_WARNING
 665                                "CAPI header: unknown channel id\n");
 666                         break;
 667                 }
 668
 669                 if (!capi_decode_disc_ind(chan, skb))
 670                         pcbit_fsm_event(dev, chan, EV_NET_DISC, NULL);
 671                 else
 672                         printk(KERN_WARNING "capi_decode_disc_ind - error\n");
 673                 break;
 674         case MSG_DISC_CONF:
 675                 if (!(chan = capi_channel(dev, skb))) {
 676                         printk(KERN_WARNING
 677                                "CAPI header: unknown channel id\n");
 678                         break;
 679                 }
 680
 681                 if (!capi_decode_disc_ind(chan, skb))
 682                         pcbit_fsm_event(dev, chan, EV_NET_RELEASE, NULL);
 683                 else
 684                         printk(KERN_WARNING "capi_decode_disc_conf - error\n");
 685                 break;
 686         case MSG_INFO_IND:
 687 #ifdef DEBUG
 688                 printk(KERN_DEBUG "received Info Indication - discarded\n");
 689 #endif
 690                 break;
 691 #ifdef DEBUG
 692         case MSG_DEBUG_188:
 693                 capi_decode_debug_188(skb->data, skb->len);
 694                 break;
 695
 696         default:
 697                 printk(KERN_DEBUG "pcbit_l3_receive: unknown message %08lx\n",
 698                        msg);
 699                 break;
 700 #endif
 701         }
 702
 703         kfree_skb(skb);
 704
 705 }
 706
 707 /*
 708  *   Single statbuf
 709  *   should be a statbuf per device
 710  */
 711
 712 static char statbuf[STATBUF_LEN];
 713 static int stat_st = 0;
 714 static int stat_end = 0;
 715
 716 int pcbit_stat(u_char __user *buf, int len, int driver, int channel)
 717 {
 718         int stat_count;
 719         stat_count = stat_end - stat_st;
 720
 721         if (stat_count < 0)
 722                 stat_count = STATBUF_LEN - stat_st + stat_end;
 723
 724         /* FIXME: should we sleep and wait for more cookies ? */
 725         if (len > stat_count)
 726                 len = stat_count;
 727
 728         if (stat_st < stat_end)
 729         {
 730                 copy_to_user(buf, statbuf + stat_st, len);
 731                 stat_st += len;
 732         }
 733         else
 734         {
 735                 if (len > STATBUF_LEN - stat_st)
 736                 {
 737                         copy_to_user(buf, statbuf + stat_st,
 738                                        STATBUF_LEN - stat_st);
 739                         copy_to_user(buf, statbuf,
 740                                        len - (STATBUF_LEN - stat_st));
 741
 742                         stat_st = len - (STATBUF_LEN - stat_st);
 743                 }
 744                 else
 745                 {
 746                         copy_to_user(buf, statbuf + stat_st, len);
 747
 748                         stat_st += len;
 749
 750                         if (stat_st == STATBUF_LEN)
 751                                 stat_st = 0;
 752                 }
 753         }
 754
 755         if (stat_st == stat_end)
 756                 stat_st = stat_end = 0;
 757
 758         return len;
 759 }
 760
 761 static void pcbit_logstat(struct pcbit_dev *dev, char *str)
 762 {
 763         int i;
 764         isdn_ctrl ictl;
 765
 766         for (i=stat_end; i<strlen(str); i++)
 767         {
 768                 statbuf[i]=str[i];
 769                 stat_end = (stat_end + 1) % STATBUF_LEN;
 770                 if (stat_end == stat_st)
 771                         stat_st = (stat_st + 1) % STATBUF_LEN;
 772         }
 773
 774         ictl.command=ISDN_STAT_STAVAIL;
 775         ictl.driver=dev->id;
 776         ictl.arg=strlen(str);
 777         dev->dev_if->statcallb(&ictl);
 778 }
 779
 780 extern char * isdn_state_table[];
 781 extern char * strisdnevent(unsigned short);
 782
 783
 784 void pcbit_state_change(struct pcbit_dev * dev, struct pcbit_chan * chan,
 785                         unsigned short i, unsigned short ev, unsigned short f)
 786 {
 787         char buf[256];
 788
 789         sprintf(buf, "change on device: %d channel:%d\n%s -> %s -> %s\n",
 790                 dev->id, chan->id,
 791                 isdn_state_table[i], strisdnevent(ev), isdn_state_table[f]
 792                 );
 793
 794 #ifdef DEBUG
 795         printk("%s", buf);
 796 #endif
 797
 798         pcbit_logstat(dev, buf);
 799 }
 800
 801 static void set_running_timeout(unsigned long ptr)
 802 {
 803         struct pcbit_dev * dev;
 804
 805 #ifdef DEBUG
 806         printk(KERN_DEBUG "set_running_timeout\n");
 807 #endif
 808         dev = (struct pcbit_dev *) ptr;
 809
 810         wake_up_interruptible(&dev->set_running_wq);
 811 }
 812
 813 static int set_protocol_running(struct pcbit_dev * dev)
 814 {
 815         isdn_ctrl ctl;
 816
 817         init_timer(&dev->set_running_timer);
 818
 819         dev->set_running_timer.function = &set_running_timeout;
 820         dev->set_running_timer.data = (ulong) dev;
 821         dev->set_running_timer.expires = jiffies + SET_RUN_TIMEOUT;
 822
 823         /* kick it */
 824
 825         dev->l2_state = L2_STARTING;
 826
 827         writeb((0x80U | ((dev->rcv_seq & 0x07) << 3) | (dev->send_seq & 0x07)),
 828                dev->sh_mem + BANK4);
 829
 830         add_timer(&dev->set_running_timer);
 831
 832         interruptible_sleep_on(&dev->set_running_wq);
 833
 834         del_timer(&dev->set_running_timer);
 835
 836         if (dev->l2_state == L2_RUNNING)
 837         {
 838                 printk(KERN_DEBUG "pcbit: running\n");
 839
 840                 dev->unack_seq = dev->send_seq;
 841
 842                 dev->writeptr = dev->sh_mem;
 843                 dev->readptr = dev->sh_mem + BANK2;
 844
 845                 /* tell the good news to the upper layer */
 846                 ctl.driver = dev->id;
 847                 ctl.command = ISDN_STAT_RUN;
 848
 849                 dev->dev_if->statcallb(&ctl);
 850         }
 851         else
 852         {
 853                 printk(KERN_DEBUG "pcbit: initialization failed\n");
 854                 printk(KERN_DEBUG "pcbit: firmware not loaded\n");
 855
 856                 dev->l2_state = L2_DOWN;
 857
 858 #ifdef DEBUG
 859                 printk(KERN_DEBUG "Bank3 = %02x\n",
 860                        readb(dev->sh_mem + BANK3));
 861 #endif
 862                 writeb(0x40, dev->sh_mem + BANK4);
 863
 864                 /* warn the upper layer */
 865                 ctl.driver = dev->id;
 866                 ctl.command = ISDN_STAT_STOP;
 867
 868                 dev->dev_if->statcallb(&ctl);
 869
 870                 return -EL2HLT; /* Level 2 halted */
 871         }
 872
 873         return 0;
 874 }
 875
 876 static int pcbit_ioctl(isdn_ctrl* ctl)
 877 {
 878         struct pcbit_dev * dev;
 879         struct pcbit_ioctl *cmd;
 880
 881         dev = finddev(ctl->driver);
 882
 883         if (!dev)
 884         {
 885                 printk(KERN_DEBUG "pcbit_ioctl: unknown device\n");
 886                 return -ENODEV;
 887         }
 888
 889         cmd = (struct pcbit_ioctl *) ctl->parm.num;
 890
 891         switch(ctl->arg) {
 892         case PCBIT_IOCTL_GETSTAT:
 893                 cmd->info.l2_status = dev->l2_state;
 894                 break;
 895
 896         case PCBIT_IOCTL_STRLOAD:
 897                 if (dev->l2_state == L2_RUNNING)
 898                         return -EBUSY;
 899
 900                 dev->unack_seq = dev->send_seq = dev->rcv_seq = 0;
 901
 902                 dev->writeptr = dev->sh_mem;
 903                 dev->readptr = dev->sh_mem + BANK2;
 904
 905                 dev->l2_state = L2_LOADING;
 906                 break;
 907
 908         case PCBIT_IOCTL_LWMODE:
 909                 if (dev->l2_state != L2_LOADING)
 910                         return -EINVAL;
 911
 912                 dev->l2_state = L2_LWMODE;
 913                 break;
 914
 915         case PCBIT_IOCTL_FWMODE:
 916                 if (dev->l2_state == L2_RUNNING)
 917                         return -EBUSY;
 918                 dev->loadptr = LOAD_ZONE_START;
 919                 dev->l2_state = L2_FWMODE;
 920
 921                 break;
 922         case PCBIT_IOCTL_ENDLOAD:
 923                 if (dev->l2_state == L2_RUNNING)
 924                         return -EBUSY;
 925                 dev->l2_state = L2_DOWN;
 926                 break;
 927
 928         case PCBIT_IOCTL_SETBYTE:
 929                 if (dev->l2_state == L2_RUNNING)
 930                         return -EBUSY;
 931
 932                 /* check addr */
 933                 if (cmd->info.rdp_byte.addr > BANK4)
 934                         return -EFAULT;
 935
 936                 writeb(cmd->info.rdp_byte.value, dev->sh_mem + cmd->info.rdp_byte.addr);
 937                 break;
 938         case PCBIT_IOCTL_GETBYTE:
 939                 if (dev->l2_state == L2_RUNNING)
 940                         return -EBUSY;
 941
 942                 /* check addr */
 943
 944                 if (cmd->info.rdp_byte.addr > BANK4)
 945                 {
 946                         printk("getbyte: invalid addr %04x\n", cmd->info.rdp_byte.addr);
 947                         return -EFAULT;
 948                 }
 949
 950                 cmd->info.rdp_byte.value = readb(dev->sh_mem + cmd->info.rdp_byte.addr);
 951                 break;
 952         case PCBIT_IOCTL_RUNNING:
 953                 if (dev->l2_state == L2_RUNNING)
 954                         return -EBUSY;
 955                 return set_protocol_running(dev);
 956                 break;
 957         case PCBIT_IOCTL_WATCH188:
 958                 if (dev->l2_state != L2_LOADING)
 959                         return -EINVAL;
 960                 pcbit_l2_write(dev, MSG_WATCH188, 0x0001, NULL, 0);
 961                 break;
 962         case PCBIT_IOCTL_PING188:
 963                 if (dev->l2_state != L2_LOADING)
 964                         return -EINVAL;
 965                 pcbit_l2_write(dev, MSG_PING188_REQ, 0x0001, NULL, 0);
 966                 break;
 967         case PCBIT_IOCTL_APION:
 968                 if (dev->l2_state != L2_LOADING)
 969                         return -EINVAL;
 970                 pcbit_l2_write(dev, MSG_API_ON, 0x0001, NULL, 0);
 971                 break;
 972         case PCBIT_IOCTL_STOP:
 973                 dev->l2_state = L2_DOWN;
 974                 writeb(0x40, dev->sh_mem + BANK4);
 975                 dev->rcv_seq = 0;
 976                 dev->send_seq = 0;
 977                 dev->unack_seq = 0;
 978                 break;
 979         default:
 980                 printk("error: unknown ioctl\n");
 981                 break;
 982         };
 983         return 0;
 984 }
 985
 986 /*
 987  *        MSN list handling
 988  *
 989  *        if null reject all calls
 990  *        if first entry has null MSN accept all calls
 991  */
 992
 993 static void pcbit_clear_msn(struct pcbit_dev *dev)
 994 {
 995         struct msn_entry *ptr, *back;
 996
 997         for (ptr=dev->msn_list; ptr; )
 998         {
 999                 back = ptr->next;
1000                 kfree(ptr);
1001                 ptr = back;
1002         }
1003
1004         dev->msn_list = NULL;
1005 }
1006
1007 static void pcbit_set_msn(struct pcbit_dev *dev, char *list)
1008 {
1009         struct msn_entry *ptr;
1010         struct msn_entry *back = NULL;
1011         char *cp, *sp;
1012         int len;
1013
1014         if (strlen(list) == 0) {
1015                 ptr = kmalloc(sizeof(struct msn_entry), GFP_ATOMIC);
1016                 if (!ptr) {
1017                         printk(KERN_WARNING "kmalloc failed\n");
1018                         return;
1019                 }
1020
1021                 ptr->msn = NULL;
1022
1023                 ptr->next = dev->msn_list;
1024                 dev->msn_list = ptr;
1025
1026                 return;
1027         }
1028
1029         if (dev->msn_list)
1030                 for (back=dev->msn_list; back->next; back=back->next);
1031
1032         sp = list;
1033
1034         do {
1035                 cp=strchr(sp, ',');
1036                 if (cp)
1037                         len = cp - sp;
1038                 else
1039                         len = strlen(sp);
1040
1041                 ptr = kmalloc(sizeof(struct msn_entry), GFP_ATOMIC);
1042
1043                 if (!ptr) {
1044                         printk(KERN_WARNING "kmalloc failed\n");
1045                         return;
1046                 }
1047                 ptr->next = NULL;
1048
1049                 ptr->msn = kmalloc(len, GFP_ATOMIC);
1050                 if (!ptr->msn) {
1051                         printk(KERN_WARNING "kmalloc failed\n");
1052                         kfree(ptr);
1053                         return;
1054                 }
1055
1056                 memcpy(ptr->msn, sp, len - 1);
1057                 ptr->msn[len] = 0;
1058
1059 #ifdef DEBUG
1060                 printk(KERN_DEBUG "msn: %s\n", ptr->msn);
1061 #endif
1062                 if (dev->msn_list == NULL)
1063                         dev->msn_list = ptr;
1064                 else
1065                         back->next = ptr;
1066                 back = ptr;
1067                 sp += len;
1068         } while(cp);
1069 }
1070
1071 /*
1072  *  check if we do signal or reject an incoming call
1073  */
1074 static int pcbit_check_msn(struct pcbit_dev *dev, char *msn)
1075 {
1076         struct msn_entry *ptr;
1077
1078         for (ptr=dev->msn_list; ptr; ptr=ptr->next) {
1079
1080                 if (ptr->msn == NULL)
1081                         return 1;
1082
1083                 if (strcmp(ptr->msn, msn) == 0)
1084                         return 1;
1085         }
1086
1087         return 0;
1088 }