drivers/isdn/sc/init.c

   1 /*
   2  * This software may be used and distributed according to the terms
   3  * of the GNU General Public License, incorporated herein by reference.
   4  *
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/init.h>
   9 #include <linux/interrupt.h>
  10 #include "includes.h"
  11 #include "hardware.h"
  12 #include "card.h"
  13
  14 MODULE_DESCRIPTION("ISDN4Linux: Driver for Spellcaster card");
  15 MODULE_AUTHOR("Spellcaster Telecommunications Inc.");
  16 MODULE_LICENSE("GPL");
  17 MODULE_PARM( io, "1-" __MODULE_STRING(MAX_CARDS) "i");
  18 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_CARDS) "i");
  19 MODULE_PARM(ram, "1-" __MODULE_STRING(MAX_CARDS) "i");
  20 MODULE_PARM(do_reset, "i");
  21
  22 board *sc_adapter[MAX_CARDS];
  23 int cinst;
  24
  25 static char devname[] = "scX";
  26 const char version[] = "2.0b1";
  27
  28 const char *boardname[] = { "DataCommute/BRI", "DataCommute/PRI", "TeleCommute/BRI" };
  29
  30 /* insmod set parameters */
  31 static unsigned int io[] = {0,0,0,0};
  32 static unsigned char irq[] = {0,0,0,0};
  33 static unsigned long ram[] = {0,0,0,0};
  34 static int do_reset = 0;
  35
  36 static int sup_irq[] = { 11, 10, 9, 5, 12, 14, 7, 3, 4, 6 };
  37 #define MAX_IRQS        10
  38
  39 extern irqreturn_t interrupt_handler(int, void *, struct pt_regs *);
  40 extern int sndpkt(int, int, int, struct sk_buff *);
  41 extern int command(isdn_ctrl *);
  42 extern int indicate_status(int, int, ulong, char*);
  43 extern int reset(int);
  44
  45 int identify_board(unsigned long, unsigned int);
  46
  47 int irq_supported(int irq_x)
  48 {
  49         int i;
  50         for(i=0 ; i < MAX_IRQS ; i++) {
  51                 if(sup_irq[i] == irq_x)
  52                         return 1;
  53         }
  54         return 0;
  55 }
  56
  57 static int __init sc_init(void)
  58 {
  59         int b = -1;
  60         int i, j;
  61         int status = -ENODEV;
  62
  63         unsigned long memsize = 0;
  64         unsigned long features = 0;
  65         isdn_if *interface;
  66         unsigned char channels;
  67         unsigned char pgport;
  68         unsigned long magic;
  69         int model;
  70         int last_base = IOBASE_MIN;
  71         int probe_exhasted = 0;
  72
  73 #ifdef MODULE
  74         pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s Loaded\n", version);
  75 #else
  76         pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s\n", version);
  77 #endif
  78         pr_info("Copyright (C) 1996 SpellCaster Telecommunications Inc.\n");
  79
  80         while(b++ < MAX_CARDS - 1) {
  81                 pr_debug("Probing for adapter #%d\n", b);
  82                 /*
  83                  * Initialize reusable variables
  84                  */
  85                 model = -1;
  86                 magic = 0;
  87                 channels = 0;
  88                 pgport = 0;
  89
  90                 /*
  91                  * See if we should probe for IO base
  92                  */
  93                 pr_debug("I/O Base for board %d is 0x%x, %s probe\n", b, io[b],
  94                         io[b] == 0 ? "will" : "won't");
  95                 if(io[b]) {
  96                         /*
  97                          * No, I/O Base has been provided
  98                          */
  99                         for (i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
 100                                 if(!request_region(io[b] + i * 0x400, 1, "sc test")) {
 101                                         pr_debug("check_region for 0x%x failed\n", io[b] + i * 0x400);
 102                                         io[b] = 0;
 103                                         break;
 104                                 } else
 105                                         release_region(io[b] + i * 0x400, 1);
 106                         }
 107
 108                         /*
 109                          * Confirm the I/O Address with a test
 110                          */
 111                         if(io[b] == 0) {
 112                                 pr_debug("I/O Address 0x%x is in use.\n");
 113                                 continue;
 114                         }
 115
 116                         outb(0x18, io[b] + 0x400 * EXP_PAGE0);
 117                         if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
 118                                 pr_debug("I/O Base 0x%x fails test\n");
 119                                 continue;
 120                         }
 121                 }
 122                 else {
 123                         /*
 124                          * Yes, probe for I/O Base
 125                          */
 126                         if(probe_exhasted) {
 127                                 pr_debug("All probe addresses exhasted, skipping\n");
 128                                 continue;
 129                         }
 130                         pr_debug("Probing for I/O...\n");
 131                         for (i = last_base ; i <= IOBASE_MAX ; i += IOBASE_OFFSET) {
 132                                 int found_io = 1;
 133                                 if (i == IOBASE_MAX) {
 134                                         probe_exhasted = 1; /* No more addresses to probe */
 135                                         pr_debug("End of Probes\n");
 136                                 }
 137                                 last_base = i + IOBASE_OFFSET;
 138                                 pr_debug("  checking 0x%x...", i);
 139                                 for ( j = 0 ; j < MAX_IO_REGS - 1 ; j++) {
 140                                         if(!request_region(i + j * 0x400, 1, "sc test")) {
 141                                                 pr_debug("Failed\n");
 142                                                 found_io = 0;
 143                                                 break;
 144                                         } else
 145                                                 release_region(i + j * 0x400, 1);
 146                                 }
 147
 148                                 if(found_io) {
 149                                         io[b] = i;
 150                                         outb(0x18, io[b] + 0x400 * EXP_PAGE0);
 151                                         if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
 152                                                 pr_debug("Failed by test\n");
 153                                                 continue;
 154                                         }
 155                                         pr_debug("Passed\n");
 156                                         break;
 157                                 }
 158                         }
 159                         if(probe_exhasted) {
 160                                 continue;
 161                         }
 162                 }
 163
 164                 /*
 165                  * See if we should probe for shared RAM
 166                  */
 167                 if(do_reset) {
 168                         pr_debug("Doing a SAFE probe reset\n");
 169                         outb(0xFF, io[b] + RESET_OFFSET);
 170                         set_current_state(TASK_INTERRUPTIBLE);
 171                         schedule_timeout(milliseconds(10000));
 172                 }
 173                 pr_debug("RAM Base for board %d is 0x%x, %s probe\n", b, ram[b],
 174                         ram[b] == 0 ? "will" : "won't");
 175
 176                 if(ram[b]) {
 177                         /*
 178                          * No, the RAM base has been provided
 179                          * Just look for a signature and ID the
 180                          * board model
 181                          */
 182                         if(request_region(ram[b], SRAM_PAGESIZE, "sc test")) {
 183                                 pr_debug("request_region for RAM base 0x%x succeeded\n", ram[b]);
 184                                 model = identify_board(ram[b], io[b]);
 185                                 release_region(ram[b], SRAM_PAGESIZE);
 186                         }
 187                 }
 188                 else {
 189                         /*
 190                          * Yes, probe for free RAM and look for
 191                          * a signature and id the board model
 192                          */
 193                         for (i = SRAM_MIN ; i < SRAM_MAX ; i += SRAM_PAGESIZE) {
 194                                 pr_debug("Checking RAM address 0x%x...\n", i);
 195                                 if(request_region(i, SRAM_PAGESIZE, "sc test")) {
 196                                         pr_debug("  check_region succeeded\n");
 197                                         model = identify_board(i, io[b]);
 198                                         release_region(i, SRAM_PAGESIZE);
 199                                         if (model >= 0) {
 200                                                 pr_debug("  Identified a %s\n",
 201                                                         boardname[model]);
 202                                                 ram[b] = i;
 203                                                 break;
 204                                         }
 205                                         pr_debug("  Unidentifed or inaccessible\n");
 206                                         continue;
 207                                 }
 208                                 pr_debug("  request failed\n");
 209                         }
 210                 }
 211                 /*
 212                  * See if we found free RAM and the board model
 213                  */
 214                 if(!ram[b] || model < 0) {
 215                         /*
 216                          * Nope, there was no place in RAM for the
 217                          * board, or it couldn't be identified
 218                          */
 219                          pr_debug("Failed to find an adapter at 0x%x\n", ram[b]);
 220                          continue;
 221                 }
 222
 223                 /*
 224                  * Set the board's magic number, memory size and page register
 225                  */
 226                 switch(model) {
 227                 case PRI_BOARD:
 228                         channels = 23;
 229                         magic = 0x20000;
 230                         memsize = 0x100000;
 231                         features = PRI_FEATURES;
 232                         break;
 233
 234                 case BRI_BOARD:
 235                 case POTS_BOARD:
 236                         channels = 2;
 237                         magic = 0x60000;
 238                         memsize = 0x10000;
 239                         features = BRI_FEATURES;
 240                         break;
 241                 }
 242                 switch(ram[b] >> 12 & 0x0F) {
 243                 case 0x0:
 244                         pr_debug("RAM Page register set to EXP_PAGE0\n");
 245                         pgport = EXP_PAGE0;
 246                         break;
 247
 248                 case 0x4:
 249                         pr_debug("RAM Page register set to EXP_PAGE1\n");
 250                         pgport = EXP_PAGE1;
 251                         break;
 252
 253                 case 0x8:
 254                         pr_debug("RAM Page register set to EXP_PAGE2\n");
 255                         pgport = EXP_PAGE2;
 256                         break;
 257
 258                 case 0xC:
 259                         pr_debug("RAM Page register set to EXP_PAGE3\n");
 260                         pgport = EXP_PAGE3;
 261                         break;
 262
 263                 default:
 264                         pr_debug("RAM base address doesn't fall on 16K boundary\n");
 265                         continue;
 266                 }
 267
 268                 pr_debug("current IRQ: %d  b: %d\n",irq[b],b);
 269
 270                 /*
 271                  * Make sure we got an IRQ
 272                  */
 273                 if(!irq[b]) {
 274                         /*
 275                          * No interrupt could be used
 276                          */
 277                         pr_debug("Failed to acquire an IRQ line\n");
 278                         continue;
 279                 }
 280
 281                 /*
 282                  * Horray! We found a board, Make sure we can register
 283                  * it with ISDN4Linux
 284                  */
 285                 interface = kmalloc(sizeof(isdn_if), GFP_KERNEL);
 286                 if (interface == NULL) {
 287                         /*
 288                          * Oops, can't malloc isdn_if
 289                          */
 290                         continue;
 291                 }
 292                 memset(interface, 0, sizeof(isdn_if));
 293
 294                 interface->owner = THIS_MODULE;
 295                 interface->hl_hdrlen = 0;
 296                 interface->channels = channels;
 297                 interface->maxbufsize = BUFFER_SIZE;
 298                 interface->features = features;
 299                 interface->writebuf_skb = sndpkt;
 300                 interface->writecmd = NULL;
 301                 interface->command = command;
 302                 strcpy(interface->id, devname);
 303                 interface->id[2] = '0' + cinst;
 304
 305                 /*
 306                  * Allocate the board structure
 307                  */
 308                 sc_adapter[cinst] = kmalloc(sizeof(board), GFP_KERNEL);
 309                 if (sc_adapter[cinst] == NULL) {
 310                         /*
 311                          * Oops, can't alloc memory for the board
 312                          */
 313                         kfree(interface);
 314                         continue;
 315                 }
 316                 memset(sc_adapter[cinst], 0, sizeof(board));
 317                 spin_lock_init(&sc_adapter[cinst]->lock);
 318
 319                 if(!register_isdn(interface)) {
 320                         /*
 321                          * Oops, couldn't register for some reason
 322                          */
 323                         kfree(interface);
 324                         kfree(sc_adapter[cinst]);
 325                         continue;
 326                 }
 327
 328                 sc_adapter[cinst]->card = interface;
 329                 sc_adapter[cinst]->driverId = interface->channels;
 330                 strcpy(sc_adapter[cinst]->devicename, interface->id);
 331                 sc_adapter[cinst]->nChannels = channels;
 332                 sc_adapter[cinst]->ramsize = memsize;
 333                 sc_adapter[cinst]->shmem_magic = magic;
 334                 sc_adapter[cinst]->shmem_pgport = pgport;
 335                 sc_adapter[cinst]->StartOnReset = 1;
 336
 337                 /*
 338                  * Allocate channels status structures
 339                  */
 340                 sc_adapter[cinst]->channel = kmalloc(sizeof(bchan) * channels, GFP_KERNEL);
 341                 if (sc_adapter[cinst]->channel == NULL) {
 342                         /*
 343                          * Oops, can't alloc memory for the channels
 344                          */
 345                         indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL);      /* Fix me */
 346                         kfree(interface);
 347                         kfree(sc_adapter[cinst]);
 348                         continue;
 349                 }
 350                 memset(sc_adapter[cinst]->channel, 0, sizeof(bchan) * channels);
 351
 352                 /*
 353                  * Lock down the hardware resources
 354                  */
 355                 sc_adapter[cinst]->interrupt = irq[b];
 356                 if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
 357                                 SA_INTERRUPT, interface->id, NULL))
 358                 {
 359                         kfree(sc_adapter[cinst]->channel);
 360                         indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL);      /* Fix me */
 361                         kfree(interface);
 362                         kfree(sc_adapter[cinst]);
 363                         continue;
 364
 365                 }
 366                 sc_adapter[cinst]->iobase = io[b];
 367                 for(i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
 368                         sc_adapter[cinst]->ioport[i] = io[b] + i * 0x400;
 369                         request_region(sc_adapter[cinst]->ioport[i], 1,
 370                                         interface->id);
 371                         pr_debug("Requesting I/O Port %#x\n",
 372                                 sc_adapter[cinst]->ioport[i]);
 373                 }
 374                 sc_adapter[cinst]->ioport[IRQ_SELECT] = io[b] + 0x2;
 375                 request_region(sc_adapter[cinst]->ioport[IRQ_SELECT], 1,
 376                                 interface->id);
 377                 pr_debug("Requesting I/O Port %#x\n",
 378                                 sc_adapter[cinst]->ioport[IRQ_SELECT]);
 379                 sc_adapter[cinst]->rambase = ram[b];
 380                 request_region(sc_adapter[cinst]->rambase, SRAM_PAGESIZE,
 381                                 interface->id);
 382
 383                 pr_info("  %s (%d) - %s %d channels IRQ %d, I/O Base 0x%x, RAM Base 0x%lx\n",
 384                         sc_adapter[cinst]->devicename,
 385                         sc_adapter[cinst]->driverId,
 386                         boardname[model], channels, irq[b], io[b], ram[b]);
 387
 388                 /*
 389                  * reset the adapter to put things in motion
 390                  */
 391                 reset(cinst);
 392
 393                 cinst++;
 394                 status = 0;
 395         }
 396         if (status)
 397                 pr_info("Failed to find any adapters, driver unloaded\n");
 398         return status;
 399 }
 400
 401 static void __exit sc_exit(void)
 402 {
 403         int i, j;
 404
 405         for(i = 0 ; i < cinst ; i++) {
 406                 pr_debug("Cleaning up after adapter %d\n", i);
 407                 /*
 408                  * kill the timers
 409                  */
 410                 del_timer(&(sc_adapter[i]->reset_timer));
 411                 del_timer(&(sc_adapter[i]->stat_timer));
 412
 413                 /*
 414                  * Tell I4L we're toast
 415                  */
 416                 indicate_status(i, ISDN_STAT_STOP, 0, NULL);
 417                 indicate_status(i, ISDN_STAT_UNLOAD, 0, NULL);
 418
 419                 /*
 420                  * Release shared RAM
 421                  */
 422                 release_region(sc_adapter[i]->rambase, SRAM_PAGESIZE);
 423
 424                 /*
 425                  * Release the IRQ
 426                  */
 427                 FREE_IRQ(sc_adapter[i]->interrupt, NULL);
 428
 429                 /*
 430                  * Reset for a clean start
 431                  */
 432                 outb(0xFF, sc_adapter[i]->ioport[SFT_RESET]);
 433
 434                 /*
 435                  * Release the I/O Port regions
 436                  */
 437                 for(j = 0 ; j < MAX_IO_REGS - 1; j++) {
 438                         release_region(sc_adapter[i]->ioport[j], 1);
 439                         pr_debug("Releasing I/O Port %#x\n",
 440                                 sc_adapter[i]->ioport[j]);
 441                 }
 442                 release_region(sc_adapter[i]->ioport[IRQ_SELECT], 1);
 443                 pr_debug("Releasing I/O Port %#x\n",
 444                         sc_adapter[i]->ioport[IRQ_SELECT]);
 445
 446                 /*
 447                  * Release any memory we alloced
 448                  */
 449                 kfree(sc_adapter[i]->channel);
 450                 kfree(sc_adapter[i]->card);
 451                 kfree(sc_adapter[i]);
 452         }
 453         pr_info("SpellCaster ISA ISDN Adapter Driver Unloaded.\n");
 454 }
 455
 456 int identify_board(unsigned long rambase, unsigned int iobase)
 457 {
 458         unsigned int pgport;
 459         unsigned long sig;
 460         DualPortMemory *dpm;
 461         RspMessage rcvmsg;
 462         ReqMessage sndmsg;
 463         HWConfig_pl hwci;
 464         int x;
 465
 466         pr_debug("Attempting to identify adapter @ 0x%x io 0x%x\n",
 467                 rambase, iobase);
 468
 469         /*
 470          * Enable the base pointer
 471          */
 472         outb(rambase >> 12, iobase + 0x2c00);
 473
 474         switch(rambase >> 12 & 0x0F) {
 475         case 0x0:
 476                 pgport = iobase + PG0_OFFSET;
 477                 pr_debug("Page Register offset is 0x%x\n", PG0_OFFSET);
 478                 break;
 479
 480         case 0x4:
 481                 pgport = iobase + PG1_OFFSET;
 482                 pr_debug("Page Register offset is 0x%x\n", PG1_OFFSET);
 483                 break;
 484
 485         case 0x8:
 486                 pgport = iobase + PG2_OFFSET;
 487                 pr_debug("Page Register offset is 0x%x\n", PG2_OFFSET);
 488                 break;
 489
 490         case 0xC:
 491                 pgport = iobase + PG3_OFFSET;
 492                 pr_debug("Page Register offset is 0x%x\n", PG3_OFFSET);
 493                 break;
 494         default:
 495                 pr_debug("Invalid rambase 0x%lx\n", rambase);
 496                 return -1;
 497         }
 498
 499         /*
 500          * Try to identify a PRI card
 501          */
 502         outb(PRI_BASEPG_VAL, pgport);
 503         set_current_state(TASK_INTERRUPTIBLE);
 504         schedule_timeout(HZ);
 505         sig = readl(rambase + SIG_OFFSET);
 506         pr_debug("Looking for a signature, got 0x%x\n", sig);
 507         if(sig == SIGNATURE)
 508                 return PRI_BOARD;
 509
 510         /*
 511          * Try to identify a PRI card
 512          */
 513         outb(BRI_BASEPG_VAL, pgport);
 514         set_current_state(TASK_INTERRUPTIBLE);
 515         schedule_timeout(HZ);
 516         sig = readl(rambase + SIG_OFFSET);
 517         pr_debug("Looking for a signature, got 0x%x\n", sig);
 518         if(sig == SIGNATURE)
 519                 return BRI_BOARD;
 520
 521         return -1;
 522
 523         /*
 524          * Try to spot a card
 525          */
 526         sig = readl(rambase + SIG_OFFSET);
 527         pr_debug("Looking for a signature, got 0x%x\n", sig);
 528         if(sig != SIGNATURE)
 529                 return -1;
 530
 531         dpm = (DualPortMemory *) rambase;
 532
 533         memset(&sndmsg, 0, MSG_LEN);
 534         sndmsg.msg_byte_cnt = 3;
 535         sndmsg.type = cmReqType1;
 536         sndmsg.class = cmReqClass0;
 537         sndmsg.code = cmReqHWConfig;
 538         memcpy_toio(&(dpm->req_queue[dpm->req_head++]), &sndmsg, MSG_LEN);
 539         outb(0, iobase + 0x400);
 540         pr_debug("Sent HWConfig message\n");
 541         /*
 542          * Wait for the response
 543          */
 544         x = 0;
 545         while((inb(iobase + FIFOSTAT_OFFSET) & RF_HAS_DATA) && x < 100) {
 546                 set_current_state(TASK_INTERRUPTIBLE);
 547                 schedule_timeout(1);
 548                 x++;
 549         }
 550         if(x == 100) {
 551                 pr_debug("Timeout waiting for response\n");
 552                 return -1;
 553         }
 554
 555         memcpy_fromio(&rcvmsg, &(dpm->rsp_queue[dpm->rsp_tail]), MSG_LEN);
 556         pr_debug("Got HWConfig response, status = 0x%x\n", rcvmsg.rsp_status);
 557         memcpy(&hwci, &(rcvmsg.msg_data.HWCresponse), sizeof(HWConfig_pl));
 558         pr_debug("Hardware Config: Interface: %s, RAM Size: %d, Serial: %s\n"
 559                  "                 Part: %s, Rev: %s\n",
 560                  hwci.st_u_sense ? "S/T" : "U", hwci.ram_size,
 561                  hwci.serial_no, hwci.part_no, hwci.rev_no);
 562
 563         if(!strncmp(PRI_PARTNO, hwci.part_no, 6))
 564                 return PRI_BOARD;
 565         if(!strncmp(BRI_PARTNO, hwci.part_no, 6))
 566                 return BRI_BOARD;
 567
 568         return -1;
 569 }
 570
 571 module_init(sc_init);
 572 module_exit(sc_exit);