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   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 static int pcbit_command(isdn_ctrl* ctl);
  60 static int pcbit_stat(u_char __user * buf, int len, int, int);
  61 static int pcbit_xmit(int driver, int chan, int ack, struct sk_buff *skb);
  62 static 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 static 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 static 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 static 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                 kfree(cbdata.data.setup.CalledPN);
 565                 kfree(cbdata.data.setup.CallingPN);
 566                 break;
 567
 568         case MSG_CONN_CONF:
 569                 /*
 570                  * We should be able to find the channel by the message
 571                  * reference number. The current version of the firmware
 572                  * doesn't sent the ref number correctly.
 573                  */
 574 #ifdef DEBUG
 575                 printk(KERN_DEBUG "refnum=%04x b1=%04x b2=%04x\n", refnum,
 576                        dev->b1->s_refnum,
 577                        dev->b2->s_refnum);
 578 #endif
 579                 /* We just try to find a channel in the right state */
 580
 581                 if (dev->b1->fsm_state == ST_CALL_INIT)
 582                         chan = dev->b1;
 583                 else {
 584                         if (dev->b2->s_refnum == ST_CALL_INIT)
 585                                 chan = dev->b2;
 586                         else {
 587                                 chan = NULL;
 588                                 printk(KERN_WARNING "Connection Confirm - no channel in Call Init state\n");
 589                                 break;
 590                         }
 591                 }
 592                 if (capi_decode_conn_conf(chan, skb, &complete)) {
 593                         printk(KERN_DEBUG "conn_conf indicates error\n");
 594                         pcbit_fsm_event(dev, chan, EV_ERROR, NULL);
 595                 }
 596                 else
 597                         if (complete)
 598                                 pcbit_fsm_event(dev, chan, EV_NET_CALL_PROC, NULL);
 599                         else
 600                                 pcbit_fsm_event(dev, chan, EV_NET_SETUP_ACK, NULL);
 601                 break;
 602         case MSG_CONN_ACTV_IND:
 603
 604                 if (!(chan = capi_channel(dev, skb))) {
 605                         printk(KERN_WARNING
 606                                "CAPI header: unknown channel id\n");
 607                         break;
 608                 }
 609
 610                 if (capi_decode_conn_actv_ind(chan, skb)) {
 611                         printk("error in capi_decode_conn_actv_ind\n");
 612                      /* pcbit_fsm_event(dev, chan, EV_ERROR, NULL); */
 613                         break;
 614                 }
 615                 chan->r_refnum = refnum;
 616                 pcbit_fsm_event(dev, chan, EV_NET_CONN, NULL);
 617                 break;
 618         case MSG_CONN_ACTV_CONF:
 619
 620                 if (!(chan = capi_channel(dev, skb))) {
 621                         printk(KERN_WARNING
 622                                "CAPI header: unknown channel id\n");
 623                         break;
 624                 }
 625
 626                 if (capi_decode_conn_actv_conf(chan, skb) == 0)
 627                         pcbit_fsm_event(dev, chan, EV_NET_CONN_ACK, NULL);
 628
 629                 else
 630                         printk(KERN_DEBUG "decode_conn_actv_conf failed\n");
 631                 break;
 632
 633         case  MSG_SELP_CONF:
 634
 635                 if (!(chan = capi_channel(dev, skb))) {
 636                         printk(KERN_WARNING
 637                                "CAPI header: unknown channel id\n");
 638                         break;
 639                 }
 640
 641                 if (!(err = capi_decode_sel_proto_conf(chan, skb)))
 642                         pcbit_fsm_event(dev, chan, EV_NET_SELP_RESP, NULL);
 643                 else {
 644                         /* Error */
 645                         printk("error %d - capi_decode_sel_proto_conf\n", err);
 646                 }
 647                 break;
 648         case MSG_ACT_TRANSP_CONF:
 649                 if (!(chan = capi_channel(dev, skb))) {
 650                         printk(KERN_WARNING
 651                                "CAPI header: unknown channel id\n");
 652                         break;
 653                 }
 654
 655                 if (!capi_decode_actv_trans_conf(chan, skb))
 656                         pcbit_fsm_event(dev, chan, EV_NET_ACTV_RESP, NULL);
 657                 break;
 658
 659         case MSG_DISC_IND:
 660
 661                 if (!(chan = capi_channel(dev, skb))) {
 662                         printk(KERN_WARNING
 663                                "CAPI header: unknown channel id\n");
 664                         break;
 665                 }
 666
 667                 if (!capi_decode_disc_ind(chan, skb))
 668                         pcbit_fsm_event(dev, chan, EV_NET_DISC, NULL);
 669                 else
 670                         printk(KERN_WARNING "capi_decode_disc_ind - error\n");
 671                 break;
 672         case MSG_DISC_CONF:
 673                 if (!(chan = capi_channel(dev, skb))) {
 674                         printk(KERN_WARNING
 675                                "CAPI header: unknown channel id\n");
 676                         break;
 677                 }
 678
 679                 if (!capi_decode_disc_ind(chan, skb))
 680                         pcbit_fsm_event(dev, chan, EV_NET_RELEASE, NULL);
 681                 else
 682                         printk(KERN_WARNING "capi_decode_disc_conf - error\n");
 683                 break;
 684         case MSG_INFO_IND:
 685 #ifdef DEBUG
 686                 printk(KERN_DEBUG "received Info Indication - discarded\n");
 687 #endif
 688                 break;
 689 #ifdef DEBUG
 690         case MSG_DEBUG_188:
 691                 capi_decode_debug_188(skb->data, skb->len);
 692                 break;
 693
 694         default:
 695                 printk(KERN_DEBUG "pcbit_l3_receive: unknown message %08lx\n",
 696                        msg);
 697                 break;
 698 #endif
 699         }
 700
 701         kfree_skb(skb);
 702
 703 }
 704
 705 /*
 706  *   Single statbuf
 707  *   should be a statbuf per device
 708  */
 709
 710 static char statbuf[STATBUF_LEN];
 711 static int stat_st = 0;
 712 static int stat_end = 0;
 713
 714 static int pcbit_stat(u_char __user *buf, int len, int driver, int channel)
 715 {
 716         int stat_count;
 717         stat_count = stat_end - stat_st;
 718
 719         if (stat_count < 0)
 720                 stat_count = STATBUF_LEN - stat_st + stat_end;
 721
 722         /* FIXME: should we sleep and wait for more cookies ? */
 723         if (len > stat_count)
 724                 len = stat_count;
 725
 726         if (stat_st < stat_end)
 727         {
 728                 copy_to_user(buf, statbuf + stat_st, len);
 729                 stat_st += len;
 730         }
 731         else
 732         {
 733                 if (len > STATBUF_LEN - stat_st)
 734                 {
 735                         copy_to_user(buf, statbuf + stat_st,
 736                                        STATBUF_LEN - stat_st);
 737                         copy_to_user(buf, statbuf,
 738                                        len - (STATBUF_LEN - stat_st));
 739
 740                         stat_st = len - (STATBUF_LEN - stat_st);
 741                 }
 742                 else
 743                 {
 744                         copy_to_user(buf, statbuf + stat_st, len);
 745
 746                         stat_st += len;
 747
 748                         if (stat_st == STATBUF_LEN)
 749                                 stat_st = 0;
 750                 }
 751         }
 752
 753         if (stat_st == stat_end)
 754                 stat_st = stat_end = 0;
 755
 756         return len;
 757 }
 758
 759 static void pcbit_logstat(struct pcbit_dev *dev, char *str)
 760 {
 761         int i;
 762         isdn_ctrl ictl;
 763
 764         for (i=stat_end; i<strlen(str); i++)
 765         {
 766                 statbuf[i]=str[i];
 767                 stat_end = (stat_end + 1) % STATBUF_LEN;
 768                 if (stat_end == stat_st)
 769                         stat_st = (stat_st + 1) % STATBUF_LEN;
 770         }
 771
 772         ictl.command=ISDN_STAT_STAVAIL;
 773         ictl.driver=dev->id;
 774         ictl.arg=strlen(str);
 775         dev->dev_if->statcallb(&ictl);
 776 }
 777
 778 extern char * isdn_state_table[];
 779 extern char * strisdnevent(unsigned short);
 780
 781
 782 void pcbit_state_change(struct pcbit_dev * dev, struct pcbit_chan * chan,
 783                         unsigned short i, unsigned short ev, unsigned short f)
 784 {
 785         char buf[256];
 786
 787         sprintf(buf, "change on device: %d channel:%d\n%s -> %s -> %s\n",
 788                 dev->id, chan->id,
 789                 isdn_state_table[i], strisdnevent(ev), isdn_state_table[f]
 790                 );
 791
 792 #ifdef DEBUG
 793         printk("%s", buf);
 794 #endif
 795
 796         pcbit_logstat(dev, buf);
 797 }
 798
 799 static void set_running_timeout(unsigned long ptr)
 800 {
 801         struct pcbit_dev * dev;
 802
 803 #ifdef DEBUG
 804         printk(KERN_DEBUG "set_running_timeout\n");
 805 #endif
 806         dev = (struct pcbit_dev *) ptr;
 807
 808         wake_up_interruptible(&dev->set_running_wq);
 809 }
 810
 811 static int set_protocol_running(struct pcbit_dev * dev)
 812 {
 813         isdn_ctrl ctl;
 814
 815         init_timer(&dev->set_running_timer);
 816
 817         dev->set_running_timer.function = &set_running_timeout;
 818         dev->set_running_timer.data = (ulong) dev;
 819         dev->set_running_timer.expires = jiffies + SET_RUN_TIMEOUT;
 820
 821         /* kick it */
 822
 823         dev->l2_state = L2_STARTING;
 824
 825         writeb((0x80U | ((dev->rcv_seq & 0x07) << 3) | (dev->send_seq & 0x07)),
 826                dev->sh_mem + BANK4);
 827
 828         add_timer(&dev->set_running_timer);
 829
 830         interruptible_sleep_on(&dev->set_running_wq);
 831
 832         del_timer(&dev->set_running_timer);
 833
 834         if (dev->l2_state == L2_RUNNING)
 835         {
 836                 printk(KERN_DEBUG "pcbit: running\n");
 837
 838                 dev->unack_seq = dev->send_seq;
 839
 840                 dev->writeptr = dev->sh_mem;
 841                 dev->readptr = dev->sh_mem + BANK2;
 842
 843                 /* tell the good news to the upper layer */
 844                 ctl.driver = dev->id;
 845                 ctl.command = ISDN_STAT_RUN;
 846
 847                 dev->dev_if->statcallb(&ctl);
 848         }
 849         else
 850         {
 851                 printk(KERN_DEBUG "pcbit: initialization failed\n");
 852                 printk(KERN_DEBUG "pcbit: firmware not loaded\n");
 853
 854                 dev->l2_state = L2_DOWN;
 855
 856 #ifdef DEBUG
 857                 printk(KERN_DEBUG "Bank3 = %02x\n",
 858                        readb(dev->sh_mem + BANK3));
 859 #endif
 860                 writeb(0x40, dev->sh_mem + BANK4);
 861
 862                 /* warn the upper layer */
 863                 ctl.driver = dev->id;
 864                 ctl.command = ISDN_STAT_STOP;
 865
 866                 dev->dev_if->statcallb(&ctl);
 867
 868                 return -EL2HLT; /* Level 2 halted */
 869         }
 870
 871         return 0;
 872 }
 873
 874 static int pcbit_ioctl(isdn_ctrl* ctl)
 875 {
 876         struct pcbit_dev * dev;
 877         struct pcbit_ioctl *cmd;
 878
 879         dev = finddev(ctl->driver);
 880
 881         if (!dev)
 882         {
 883                 printk(KERN_DEBUG "pcbit_ioctl: unknown device\n");
 884                 return -ENODEV;
 885         }
 886
 887         cmd = (struct pcbit_ioctl *) ctl->parm.num;
 888
 889         switch(ctl->arg) {
 890         case PCBIT_IOCTL_GETSTAT:
 891                 cmd->info.l2_status = dev->l2_state;
 892                 break;
 893
 894         case PCBIT_IOCTL_STRLOAD:
 895                 if (dev->l2_state == L2_RUNNING)
 896                         return -EBUSY;
 897
 898                 dev->unack_seq = dev->send_seq = dev->rcv_seq = 0;
 899
 900                 dev->writeptr = dev->sh_mem;
 901                 dev->readptr = dev->sh_mem + BANK2;
 902
 903                 dev->l2_state = L2_LOADING;
 904                 break;
 905
 906         case PCBIT_IOCTL_LWMODE:
 907                 if (dev->l2_state != L2_LOADING)
 908                         return -EINVAL;
 909
 910                 dev->l2_state = L2_LWMODE;
 911                 break;
 912
 913         case PCBIT_IOCTL_FWMODE:
 914                 if (dev->l2_state == L2_RUNNING)
 915                         return -EBUSY;
 916                 dev->loadptr = LOAD_ZONE_START;
 917                 dev->l2_state = L2_FWMODE;
 918
 919                 break;
 920         case PCBIT_IOCTL_ENDLOAD:
 921                 if (dev->l2_state == L2_RUNNING)
 922                         return -EBUSY;
 923                 dev->l2_state = L2_DOWN;
 924                 break;
 925
 926         case PCBIT_IOCTL_SETBYTE:
 927                 if (dev->l2_state == L2_RUNNING)
 928                         return -EBUSY;
 929
 930                 /* check addr */
 931                 if (cmd->info.rdp_byte.addr > BANK4)
 932                         return -EFAULT;
 933
 934                 writeb(cmd->info.rdp_byte.value, dev->sh_mem + cmd->info.rdp_byte.addr);
 935                 break;
 936         case PCBIT_IOCTL_GETBYTE:
 937                 if (dev->l2_state == L2_RUNNING)
 938                         return -EBUSY;
 939
 940                 /* check addr */
 941
 942                 if (cmd->info.rdp_byte.addr > BANK4)
 943                 {
 944                         printk("getbyte: invalid addr %04x\n", cmd->info.rdp_byte.addr);
 945                         return -EFAULT;
 946                 }
 947
 948                 cmd->info.rdp_byte.value = readb(dev->sh_mem + cmd->info.rdp_byte.addr);
 949                 break;
 950         case PCBIT_IOCTL_RUNNING:
 951                 if (dev->l2_state == L2_RUNNING)
 952                         return -EBUSY;
 953                 return set_protocol_running(dev);
 954                 break;
 955         case PCBIT_IOCTL_WATCH188:
 956                 if (dev->l2_state != L2_LOADING)
 957                         return -EINVAL;
 958                 pcbit_l2_write(dev, MSG_WATCH188, 0x0001, NULL, 0);
 959                 break;
 960         case PCBIT_IOCTL_PING188:
 961                 if (dev->l2_state != L2_LOADING)
 962                         return -EINVAL;
 963                 pcbit_l2_write(dev, MSG_PING188_REQ, 0x0001, NULL, 0);
 964                 break;
 965         case PCBIT_IOCTL_APION:
 966                 if (dev->l2_state != L2_LOADING)
 967                         return -EINVAL;
 968                 pcbit_l2_write(dev, MSG_API_ON, 0x0001, NULL, 0);
 969                 break;
 970         case PCBIT_IOCTL_STOP:
 971                 dev->l2_state = L2_DOWN;
 972                 writeb(0x40, dev->sh_mem + BANK4);
 973                 dev->rcv_seq = 0;
 974                 dev->send_seq = 0;
 975                 dev->unack_seq = 0;
 976                 break;
 977         default:
 978                 printk("error: unknown ioctl\n");
 979                 break;
 980         };
 981         return 0;
 982 }
 983
 984 /*
 985  *        MSN list handling
 986  *
 987  *        if null reject all calls
 988  *        if first entry has null MSN accept all calls
 989  */
 990
 991 static void pcbit_clear_msn(struct pcbit_dev *dev)
 992 {
 993         struct msn_entry *ptr, *back;
 994
 995         for (ptr=dev->msn_list; ptr; )
 996         {
 997                 back = ptr->next;
 998                 kfree(ptr);
 999                 ptr = back;
1000         }
1001
1002         dev->msn_list = NULL;
1003 }
1004
1005 static void pcbit_set_msn(struct pcbit_dev *dev, char *list)
1006 {
1007         struct msn_entry *ptr;
1008         struct msn_entry *back = NULL;
1009         char *cp, *sp;
1010         int len;
1011
1012         if (strlen(list) == 0) {
1013                 ptr = kmalloc(sizeof(struct msn_entry), GFP_ATOMIC);
1014                 if (!ptr) {
1015                         printk(KERN_WARNING "kmalloc failed\n");
1016                         return;
1017                 }
1018
1019                 ptr->msn = NULL;
1020
1021                 ptr->next = dev->msn_list;
1022                 dev->msn_list = ptr;
1023
1024                 return;
1025         }
1026
1027         if (dev->msn_list)
1028                 for (back=dev->msn_list; back->next; back=back->next);
1029
1030         sp = list;
1031
1032         do {
1033                 cp=strchr(sp, ',');
1034                 if (cp)
1035                         len = cp - sp;
1036                 else
1037                         len = strlen(sp);
1038
1039                 ptr = kmalloc(sizeof(struct msn_entry), GFP_ATOMIC);
1040
1041                 if (!ptr) {
1042                         printk(KERN_WARNING "kmalloc failed\n");
1043                         return;
1044                 }
1045                 ptr->next = NULL;
1046
1047                 ptr->msn = kmalloc(len, GFP_ATOMIC);
1048                 if (!ptr->msn) {
1049                         printk(KERN_WARNING "kmalloc failed\n");
1050                         kfree(ptr);
1051                         return;
1052                 }
1053
1054                 memcpy(ptr->msn, sp, len - 1);
1055                 ptr->msn[len] = 0;
1056
1057 #ifdef DEBUG
1058                 printk(KERN_DEBUG "msn: %s\n", ptr->msn);
1059 #endif
1060                 if (dev->msn_list == NULL)
1061                         dev->msn_list = ptr;
1062                 else
1063                         back->next = ptr;
1064                 back = ptr;
1065                 sp += len;
1066         } while(cp);
1067 }
1068
1069 /*
1070  *  check if we do signal or reject an incoming call
1071  */
1072 static int pcbit_check_msn(struct pcbit_dev *dev, char *msn)
1073 {
1074         struct msn_entry *ptr;
1075
1076         for (ptr=dev->msn_list; ptr; ptr=ptr->next) {
1077
1078                 if (ptr->msn == NULL)
1079                         return 1;
1080
1081                 if (strcmp(ptr->msn, msn) == 0)
1082                         return 1;
1083         }
1084
1085         return 0;
1086 }