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 <linux/delay.h>
  11 #include "includes.h"
  12 #include "hardware.h"
  13 #include "card.h"
  14
  15 MODULE_DESCRIPTION("ISDN4Linux: Driver for Spellcaster card");
  16 MODULE_AUTHOR("Spellcaster Telecommunications Inc.");
  17 MODULE_LICENSE("GPL");
  18
  19 board *sc_adapter[MAX_CARDS];
  20 int cinst;
  21
  22 static char devname[] = "scX";
  23 const char version[] = "2.0b1";
  24
  25 const char *boardname[] = { "DataCommute/BRI", "DataCommute/PRI", "TeleCommute/BRI" };
  26
  27 /* insmod set parameters */
  28 static unsigned int io[] = {0,0,0,0};
  29 static unsigned char irq[] = {0,0,0,0};
  30 static unsigned long ram[] = {0,0,0,0};
  31 static int do_reset = 0;
  32
  33 module_param_array(io, int, NULL, 0);
  34 module_param_array(irq, int, NULL, 0);
  35 module_param_array(ram, int, NULL, 0);
  36 module_param(do_reset, bool, 0);
  37
  38 static int sup_irq[] = { 11, 10, 9, 5, 12, 14, 7, 3, 4, 6 };
  39 #define MAX_IRQS        10
  40
  41 extern irqreturn_t interrupt_handler(int, void *, struct pt_regs *);
  42 extern int sndpkt(int, int, int, struct sk_buff *);
  43 extern int command(isdn_ctrl *);
  44 extern int indicate_status(int, int, ulong, char*);
  45 extern int reset(int);
  46
  47 int identify_board(unsigned long, unsigned int);
  48
  49 int irq_supported(int irq_x)
  50 {
  51         int i;
  52         for(i=0 ; i < MAX_IRQS ; i++) {
  53                 if(sup_irq[i] == irq_x)
  54                         return 1;
  55         }
  56         return 0;
  57 }
  58
  59 static int __init sc_init(void)
  60 {
  61         int b = -1;
  62         int i, j;
  63         int status = -ENODEV;
  64
  65         unsigned long memsize = 0;
  66         unsigned long features = 0;
  67         isdn_if *interface;
  68         unsigned char channels;
  69         unsigned char pgport;
  70         unsigned long magic;
  71         int model;
  72         int last_base = IOBASE_MIN;
  73         int probe_exhasted = 0;
  74
  75 #ifdef MODULE
  76         pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s Loaded\n", version);
  77 #else
  78         pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s\n", version);
  79 #endif
  80         pr_info("Copyright (C) 1996 SpellCaster Telecommunications Inc.\n");
  81
  82         while(b++ < MAX_CARDS - 1) {
  83                 pr_debug("Probing for adapter #%d\n", b);
  84                 /*
  85                  * Initialize reusable variables
  86                  */
  87                 model = -1;
  88                 magic = 0;
  89                 channels = 0;
  90                 pgport = 0;
  91
  92                 /*
  93                  * See if we should probe for IO base
  94                  */
  95                 pr_debug("I/O Base for board %d is 0x%x, %s probe\n", b, io[b],
  96                         io[b] == 0 ? "will" : "won't");
  97                 if(io[b]) {
  98                         /*
  99                          * No, I/O Base has been provided
 100                          */
 101                         for (i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
 102                                 if(!request_region(io[b] + i * 0x400, 1, "sc test")) {
 103                                         pr_debug("check_region for 0x%x failed\n", io[b] + i * 0x400);
 104                                         io[b] = 0;
 105                                         break;
 106                                 } else
 107                                         release_region(io[b] + i * 0x400, 1);
 108                         }
 109
 110                         /*
 111                          * Confirm the I/O Address with a test
 112                          */
 113                         if(io[b] == 0) {
 114                                 pr_debug("I/O Address 0x%x is in use.\n");
 115                                 continue;
 116                         }
 117
 118                         outb(0x18, io[b] + 0x400 * EXP_PAGE0);
 119                         if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
 120                                 pr_debug("I/O Base 0x%x fails test\n");
 121                                 continue;
 122                         }
 123                 }
 124                 else {
 125                         /*
 126                          * Yes, probe for I/O Base
 127                          */
 128                         if(probe_exhasted) {
 129                                 pr_debug("All probe addresses exhasted, skipping\n");
 130                                 continue;
 131                         }
 132                         pr_debug("Probing for I/O...\n");
 133                         for (i = last_base ; i <= IOBASE_MAX ; i += IOBASE_OFFSET) {
 134                                 int found_io = 1;
 135                                 if (i == IOBASE_MAX) {
 136                                         probe_exhasted = 1; /* No more addresses to probe */
 137                                         pr_debug("End of Probes\n");
 138                                 }
 139                                 last_base = i + IOBASE_OFFSET;
 140                                 pr_debug("  checking 0x%x...", i);
 141                                 for ( j = 0 ; j < MAX_IO_REGS - 1 ; j++) {
 142                                         if(!request_region(i + j * 0x400, 1, "sc test")) {
 143                                                 pr_debug("Failed\n");
 144                                                 found_io = 0;
 145                                                 break;
 146                                         } else
 147                                                 release_region(i + j * 0x400, 1);
 148                                 }
 149
 150                                 if(found_io) {
 151                                         io[b] = i;
 152                                         outb(0x18, io[b] + 0x400 * EXP_PAGE0);
 153                                         if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
 154                                                 pr_debug("Failed by test\n");
 155                                                 continue;
 156                                         }
 157                                         pr_debug("Passed\n");
 158                                         break;
 159                                 }
 160                         }
 161                         if(probe_exhasted) {
 162                                 continue;
 163                         }
 164                 }
 165
 166                 /*
 167                  * See if we should probe for shared RAM
 168                  */
 169                 if(do_reset) {
 170                         pr_debug("Doing a SAFE probe reset\n");
 171                         outb(0xFF, io[b] + RESET_OFFSET);
 172                         msleep_interruptible(10000);
 173                 }
 174                 pr_debug("RAM Base for board %d is 0x%x, %s probe\n", b, ram[b],
 175                         ram[b] == 0 ? "will" : "won't");
 176
 177                 if(ram[b]) {
 178                         /*
 179                          * No, the RAM base has been provided
 180                          * Just look for a signature and ID the
 181                          * board model
 182                          */
 183                         if(request_region(ram[b], SRAM_PAGESIZE, "sc test")) {
 184                                 pr_debug("request_region for RAM base 0x%x succeeded\n", ram[b]);
 185                                 model = identify_board(ram[b], io[b]);
 186                                 release_region(ram[b], SRAM_PAGESIZE);
 187                         }
 188                 }
 189                 else {
 190                         /*
 191                          * Yes, probe for free RAM and look for
 192                          * a signature and id the board model
 193                          */
 194                         for (i = SRAM_MIN ; i < SRAM_MAX ; i += SRAM_PAGESIZE) {
 195                                 pr_debug("Checking RAM address 0x%x...\n", i);
 196                                 if(request_region(i, SRAM_PAGESIZE, "sc test")) {
 197                                         pr_debug("  check_region succeeded\n");
 198                                         model = identify_board(i, io[b]);
 199                                         release_region(i, SRAM_PAGESIZE);
 200                                         if (model >= 0) {
 201                                                 pr_debug("  Identified a %s\n",
 202                                                         boardname[model]);
 203                                                 ram[b] = i;
 204                                                 break;
 205                                         }
 206                                         pr_debug("  Unidentifed or inaccessible\n");
 207                                         continue;
 208                                 }
 209                                 pr_debug("  request failed\n");
 210                         }
 211                 }
 212                 /*
 213                  * See if we found free RAM and the board model
 214                  */
 215                 if(!ram[b] || model < 0) {
 216                         /*
 217                          * Nope, there was no place in RAM for the
 218                          * board, or it couldn't be identified
 219                          */
 220                          pr_debug("Failed to find an adapter at 0x%x\n", ram[b]);
 221                          continue;
 222                 }
 223
 224                 /*
 225                  * Set the board's magic number, memory size and page register
 226                  */
 227                 switch(model) {
 228                 case PRI_BOARD:
 229                         channels = 23;
 230                         magic = 0x20000;
 231                         memsize = 0x100000;
 232                         features = PRI_FEATURES;
 233                         break;
 234
 235                 case BRI_BOARD:
 236                 case POTS_BOARD:
 237                         channels = 2;
 238                         magic = 0x60000;
 239                         memsize = 0x10000;
 240                         features = BRI_FEATURES;
 241                         break;
 242                 }
 243                 switch(ram[b] >> 12 & 0x0F) {
 244                 case 0x0:
 245                         pr_debug("RAM Page register set to EXP_PAGE0\n");
 246                         pgport = EXP_PAGE0;
 247                         break;
 248
 249                 case 0x4:
 250                         pr_debug("RAM Page register set to EXP_PAGE1\n");
 251                         pgport = EXP_PAGE1;
 252                         break;
 253
 254                 case 0x8:
 255                         pr_debug("RAM Page register set to EXP_PAGE2\n");
 256                         pgport = EXP_PAGE2;
 257                         break;
 258
 259                 case 0xC:
 260                         pr_debug("RAM Page register set to EXP_PAGE3\n");
 261                         pgport = EXP_PAGE3;
 262                         break;
 263
 264                 default:
 265                         pr_debug("RAM base address doesn't fall on 16K boundary\n");
 266                         continue;
 267                 }
 268
 269                 pr_debug("current IRQ: %d  b: %d\n",irq[b],b);
 270
 271                 /*
 272                  * Make sure we got an IRQ
 273                  */
 274                 if(!irq[b]) {
 275                         /*
 276                          * No interrupt could be used
 277                          */
 278                         pr_debug("Failed to acquire an IRQ line\n");
 279                         continue;
 280                 }
 281
 282                 /*
 283                  * Horray! We found a board, Make sure we can register
 284                  * it with ISDN4Linux
 285                  */
 286                 interface = kmalloc(sizeof(isdn_if), GFP_KERNEL);
 287                 if (interface == NULL) {
 288                         /*
 289                          * Oops, can't malloc isdn_if
 290                          */
 291                         continue;
 292                 }
 293                 memset(interface, 0, sizeof(isdn_if));
 294
 295                 interface->owner = THIS_MODULE;
 296                 interface->hl_hdrlen = 0;
 297                 interface->channels = channels;
 298                 interface->maxbufsize = BUFFER_SIZE;
 299                 interface->features = features;
 300                 interface->writebuf_skb = sndpkt;
 301                 interface->writecmd = NULL;
 302                 interface->command = command;
 303                 strcpy(interface->id, devname);
 304                 interface->id[2] = '0' + cinst;
 305
 306                 /*
 307                  * Allocate the board structure
 308                  */
 309                 sc_adapter[cinst] = kmalloc(sizeof(board), GFP_KERNEL);
 310                 if (sc_adapter[cinst] == NULL) {
 311                         /*
 312                          * Oops, can't alloc memory for the board
 313                          */
 314                         kfree(interface);
 315                         continue;
 316                 }
 317                 memset(sc_adapter[cinst], 0, sizeof(board));
 318                 spin_lock_init(&sc_adapter[cinst]->lock);
 319
 320                 if(!register_isdn(interface)) {
 321                         /*
 322                          * Oops, couldn't register for some reason
 323                          */
 324                         kfree(interface);
 325                         kfree(sc_adapter[cinst]);
 326                         continue;
 327                 }
 328
 329                 sc_adapter[cinst]->card = interface;
 330                 sc_adapter[cinst]->driverId = interface->channels;
 331                 strcpy(sc_adapter[cinst]->devicename, interface->id);
 332                 sc_adapter[cinst]->nChannels = channels;
 333                 sc_adapter[cinst]->ramsize = memsize;
 334                 sc_adapter[cinst]->shmem_magic = magic;
 335                 sc_adapter[cinst]->shmem_pgport = pgport;
 336                 sc_adapter[cinst]->StartOnReset = 1;
 337
 338                 /*
 339                  * Allocate channels status structures
 340                  */
 341                 sc_adapter[cinst]->channel = kmalloc(sizeof(bchan) * channels, GFP_KERNEL);
 342                 if (sc_adapter[cinst]->channel == NULL) {
 343                         /*
 344                          * Oops, can't alloc memory for the channels
 345                          */
 346                         indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL);      /* Fix me */
 347                         kfree(interface);
 348                         kfree(sc_adapter[cinst]);
 349                         continue;
 350                 }
 351                 memset(sc_adapter[cinst]->channel, 0, sizeof(bchan) * channels);
 352
 353                 /*
 354                  * Lock down the hardware resources
 355                  */
 356                 sc_adapter[cinst]->interrupt = irq[b];
 357                 if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
 358                                 SA_INTERRUPT, interface->id, NULL))
 359                 {
 360                         kfree(sc_adapter[cinst]->channel);
 361                         indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL);      /* Fix me */
 362                         kfree(interface);
 363                         kfree(sc_adapter[cinst]);
 364                         continue;
 365
 366                 }
 367                 sc_adapter[cinst]->iobase = io[b];
 368                 for(i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
 369                         sc_adapter[cinst]->ioport[i] = io[b] + i * 0x400;
 370                         request_region(sc_adapter[cinst]->ioport[i], 1,
 371                                         interface->id);
 372                         pr_debug("Requesting I/O Port %#x\n",
 373                                 sc_adapter[cinst]->ioport[i]);
 374                 }
 375                 sc_adapter[cinst]->ioport[IRQ_SELECT] = io[b] + 0x2;
 376                 request_region(sc_adapter[cinst]->ioport[IRQ_SELECT], 1,
 377                                 interface->id);
 378                 pr_debug("Requesting I/O Port %#x\n",
 379                                 sc_adapter[cinst]->ioport[IRQ_SELECT]);
 380                 sc_adapter[cinst]->rambase = ram[b];
 381                 request_region(sc_adapter[cinst]->rambase, SRAM_PAGESIZE,
 382                                 interface->id);
 383
 384                 pr_info("  %s (%d) - %s %d channels IRQ %d, I/O Base 0x%x, RAM Base 0x%lx\n",
 385                         sc_adapter[cinst]->devicename,
 386                         sc_adapter[cinst]->driverId,
 387                         boardname[model], channels, irq[b], io[b], ram[b]);
 388
 389                 /*
 390                  * reset the adapter to put things in motion
 391                  */
 392                 reset(cinst);
 393
 394                 cinst++;
 395                 status = 0;
 396         }
 397         if (status)
 398                 pr_info("Failed to find any adapters, driver unloaded\n");
 399         return status;
 400 }
 401
 402 static void __exit sc_exit(void)
 403 {
 404         int i, j;
 405
 406         for(i = 0 ; i < cinst ; i++) {
 407                 pr_debug("Cleaning up after adapter %d\n", i);
 408                 /*
 409                  * kill the timers
 410                  */
 411                 del_timer(&(sc_adapter[i]->reset_timer));
 412                 del_timer(&(sc_adapter[i]->stat_timer));
 413
 414                 /*
 415                  * Tell I4L we're toast
 416                  */
 417                 indicate_status(i, ISDN_STAT_STOP, 0, NULL);
 418                 indicate_status(i, ISDN_STAT_UNLOAD, 0, NULL);
 419
 420                 /*
 421                  * Release shared RAM
 422                  */
 423                 release_region(sc_adapter[i]->rambase, SRAM_PAGESIZE);
 424
 425                 /*
 426                  * Release the IRQ
 427                  */
 428                 FREE_IRQ(sc_adapter[i]->interrupt, NULL);
 429
 430                 /*
 431                  * Reset for a clean start
 432                  */
 433                 outb(0xFF, sc_adapter[i]->ioport[SFT_RESET]);
 434
 435                 /*
 436                  * Release the I/O Port regions
 437                  */
 438                 for(j = 0 ; j < MAX_IO_REGS - 1; j++) {
 439                         release_region(sc_adapter[i]->ioport[j], 1);
 440                         pr_debug("Releasing I/O Port %#x\n",
 441                                 sc_adapter[i]->ioport[j]);
 442                 }
 443                 release_region(sc_adapter[i]->ioport[IRQ_SELECT], 1);
 444                 pr_debug("Releasing I/O Port %#x\n",
 445                         sc_adapter[i]->ioport[IRQ_SELECT]);
 446
 447                 /*
 448                  * Release any memory we alloced
 449                  */
 450                 kfree(sc_adapter[i]->channel);
 451                 kfree(sc_adapter[i]->card);
 452                 kfree(sc_adapter[i]);
 453         }
 454         pr_info("SpellCaster ISA ISDN Adapter Driver Unloaded.\n");
 455 }
 456
 457 int identify_board(unsigned long rambase, unsigned int iobase)
 458 {
 459         unsigned int pgport;
 460         unsigned long sig;
 461         DualPortMemory *dpm;
 462         RspMessage rcvmsg;
 463         ReqMessage sndmsg;
 464         HWConfig_pl hwci;
 465         int x;
 466
 467         pr_debug("Attempting to identify adapter @ 0x%x io 0x%x\n",
 468                 rambase, iobase);
 469
 470         /*
 471          * Enable the base pointer
 472          */
 473         outb(rambase >> 12, iobase + 0x2c00);
 474
 475         switch(rambase >> 12 & 0x0F) {
 476         case 0x0:
 477                 pgport = iobase + PG0_OFFSET;
 478                 pr_debug("Page Register offset is 0x%x\n", PG0_OFFSET);
 479                 break;
 480
 481         case 0x4:
 482                 pgport = iobase + PG1_OFFSET;
 483                 pr_debug("Page Register offset is 0x%x\n", PG1_OFFSET);
 484                 break;
 485
 486         case 0x8:
 487                 pgport = iobase + PG2_OFFSET;
 488                 pr_debug("Page Register offset is 0x%x\n", PG2_OFFSET);
 489                 break;
 490
 491         case 0xC:
 492                 pgport = iobase + PG3_OFFSET;
 493                 pr_debug("Page Register offset is 0x%x\n", PG3_OFFSET);
 494                 break;
 495         default:
 496                 pr_debug("Invalid rambase 0x%lx\n", rambase);
 497                 return -1;
 498         }
 499
 500         /*
 501          * Try to identify a PRI card
 502          */
 503         outb(PRI_BASEPG_VAL, pgport);
 504         msleep_interruptible(1000);
 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         msleep_interruptible(1000);
 515         sig = readl(rambase + SIG_OFFSET);
 516         pr_debug("Looking for a signature, got 0x%x\n", sig);
 517         if(sig == SIGNATURE)
 518                 return BRI_BOARD;
 519
 520         return -1;
 521
 522         /*
 523          * Try to spot a card
 524          */
 525         sig = readl(rambase + SIG_OFFSET);
 526         pr_debug("Looking for a signature, got 0x%x\n", sig);
 527         if(sig != SIGNATURE)
 528                 return -1;
 529
 530         dpm = (DualPortMemory *) rambase;
 531
 532         memset(&sndmsg, 0, MSG_LEN);
 533         sndmsg.msg_byte_cnt = 3;
 534         sndmsg.type = cmReqType1;
 535         sndmsg.class = cmReqClass0;
 536         sndmsg.code = cmReqHWConfig;
 537         memcpy_toio(&(dpm->req_queue[dpm->req_head++]), &sndmsg, MSG_LEN);
 538         outb(0, iobase + 0x400);
 539         pr_debug("Sent HWConfig message\n");
 540         /*
 541          * Wait for the response
 542          */
 543         x = 0;
 544         while((inb(iobase + FIFOSTAT_OFFSET) & RF_HAS_DATA) && x < 100) {
 545                 set_current_state(TASK_INTERRUPTIBLE);
 546                 schedule_timeout(1);
 547                 x++;
 548         }
 549         if(x == 100) {
 550                 pr_debug("Timeout waiting for response\n");
 551                 return -1;
 552         }
 553
 554         memcpy_fromio(&rcvmsg, &(dpm->rsp_queue[dpm->rsp_tail]), MSG_LEN);
 555         pr_debug("Got HWConfig response, status = 0x%x\n", rcvmsg.rsp_status);
 556         memcpy(&hwci, &(rcvmsg.msg_data.HWCresponse), sizeof(HWConfig_pl));
 557         pr_debug("Hardware Config: Interface: %s, RAM Size: %d, Serial: %s\n"
 558                  "                 Part: %s, Rev: %s\n",
 559                  hwci.st_u_sense ? "S/T" : "U", hwci.ram_size,
 560                  hwci.serial_no, hwci.part_no, hwci.rev_no);
 561
 562         if(!strncmp(PRI_PARTNO, hwci.part_no, 6))
 563                 return PRI_BOARD;
 564         if(!strncmp(BRI_PARTNO, hwci.part_no, 6))
 565                 return BRI_BOARD;
 566
 567         return -1;
 568 }
 569
 570 module_init(sc_init);
 571 module_exit(sc_exit);