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 <linux/sched.h>
  12 #include <linux/slab.h>
  13 #include "includes.h"
  14 #include "hardware.h"
  15 #include "card.h"
  16
  17 MODULE_DESCRIPTION("ISDN4Linux: Driver for Spellcaster card");
  18 MODULE_AUTHOR("Spellcaster Telecommunications Inc.");
  19 MODULE_LICENSE("GPL");
  20
  21 board *sc_adapter[MAX_CARDS];
  22 int cinst;
  23
  24 static char devname[] = "scX";
  25 static const char version[] = "2.0b1";
  26
  27 static const char *boardname[] = { "DataCommute/BRI", "DataCommute/PRI", "TeleCommute/BRI" };
  28
  29 /* insmod set parameters */
  30 static unsigned int io[] = {0,0,0,0};
  31 static unsigned char irq[] = {0,0,0,0};
  32 static unsigned long ram[] = {0,0,0,0};
  33 static bool do_reset = 0;
  34
  35 module_param_array(io, int, NULL, 0);
  36 module_param_array(irq, int, NULL, 0);
  37 module_param_array(ram, int, NULL, 0);
  38 module_param(do_reset, bool, 0);
  39
  40 static int identify_board(unsigned long, unsigned int);
  41
  42 static int __init sc_init(void)
  43 {
  44         int b = -1;
  45         int i, j;
  46         int status = -ENODEV;
  47
  48         unsigned long memsize = 0;
  49         unsigned long features = 0;
  50         isdn_if *interface;
  51         unsigned char channels;
  52         unsigned char pgport;
  53         unsigned long magic;
  54         int model;
  55         int last_base = IOBASE_MIN;
  56         int probe_exhasted = 0;
  57
  58 #ifdef MODULE
  59         pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s Loaded\n", version);
  60 #else
  61         pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s\n", version);
  62 #endif
  63         pr_info("Copyright (C) 1996 SpellCaster Telecommunications Inc.\n");
  64
  65         while(b++ < MAX_CARDS - 1) {
  66                 pr_debug("Probing for adapter #%d\n", b);
  67                 /*
  68                  * Initialize reusable variables
  69                  */
  70                 model = -1;
  71                 magic = 0;
  72                 channels = 0;
  73                 pgport = 0;
  74
  75                 /*
  76                  * See if we should probe for IO base
  77                  */
  78                 pr_debug("I/O Base for board %d is 0x%x, %s probe\n", b, io[b],
  79                         io[b] == 0 ? "will" : "won't");
  80                 if(io[b]) {
  81                         /*
  82                          * No, I/O Base has been provided
  83                          */
  84                         for (i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
  85                                 if(!request_region(io[b] + i * 0x400, 1, "sc test")) {
  86                                         pr_debug("request_region for 0x%x failed\n", io[b] + i * 0x400);
  87                                         io[b] = 0;
  88                                         break;
  89                                 } else
  90                                         release_region(io[b] + i * 0x400, 1);
  91                         }
  92
  93                         /*
  94                          * Confirm the I/O Address with a test
  95                          */
  96                         if(io[b] == 0) {
  97                                 pr_debug("I/O Address invalid.\n");
  98                                 continue;
  99                         }
 100
 101                         outb(0x18, io[b] + 0x400 * EXP_PAGE0);
 102                         if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
 103                                 pr_debug("I/O Base 0x%x fails test\n",
 104                                          io[b] + 0x400 * EXP_PAGE0);
 105                                 continue;
 106                         }
 107                 }
 108                 else {
 109                         /*
 110                          * Yes, probe for I/O Base
 111                          */
 112                         if(probe_exhasted) {
 113                                 pr_debug("All probe addresses exhasted, skipping\n");
 114                                 continue;
 115                         }
 116                         pr_debug("Probing for I/O...\n");
 117                         for (i = last_base ; i <= IOBASE_MAX ; i += IOBASE_OFFSET) {
 118                                 int found_io = 1;
 119                                 if (i == IOBASE_MAX) {
 120                                         probe_exhasted = 1; /* No more addresses to probe */
 121                                         pr_debug("End of Probes\n");
 122                                 }
 123                                 last_base = i + IOBASE_OFFSET;
 124                                 pr_debug("  checking 0x%x...", i);
 125                                 for ( j = 0 ; j < MAX_IO_REGS - 1 ; j++) {
 126                                         if(!request_region(i + j * 0x400, 1, "sc test")) {
 127                                                 pr_debug("Failed\n");
 128                                                 found_io = 0;
 129                                                 break;
 130                                         } else
 131                                                 release_region(i + j * 0x400, 1);
 132                                 }
 133
 134                                 if(found_io) {
 135                                         io[b] = i;
 136                                         outb(0x18, io[b] + 0x400 * EXP_PAGE0);
 137                                         if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
 138                                                 pr_debug("Failed by test\n");
 139                                                 continue;
 140                                         }
 141                                         pr_debug("Passed\n");
 142                                         break;
 143                                 }
 144                         }
 145                         if(probe_exhasted) {
 146                                 continue;
 147                         }
 148                 }
 149
 150                 /*
 151                  * See if we should probe for shared RAM
 152                  */
 153                 if(do_reset) {
 154                         pr_debug("Doing a SAFE probe reset\n");
 155                         outb(0xFF, io[b] + RESET_OFFSET);
 156                         msleep_interruptible(10000);
 157                 }
 158                 pr_debug("RAM Base for board %d is 0x%lx, %s probe\n", b,
 159                         ram[b], ram[b] == 0 ? "will" : "won't");
 160
 161                 if(ram[b]) {
 162                         /*
 163                          * No, the RAM base has been provided
 164                          * Just look for a signature and ID the
 165                          * board model
 166                          */
 167                         if(request_region(ram[b], SRAM_PAGESIZE, "sc test")) {
 168                                 pr_debug("request_region for RAM base 0x%lx succeeded\n", ram[b]);
 169                                 model = identify_board(ram[b], io[b]);
 170                                 release_region(ram[b], SRAM_PAGESIZE);
 171                         }
 172                 }
 173                 else {
 174                         /*
 175                          * Yes, probe for free RAM and look for
 176                          * a signature and id the board model
 177                          */
 178                         for (i = SRAM_MIN ; i < SRAM_MAX ; i += SRAM_PAGESIZE) {
 179                                 pr_debug("Checking RAM address 0x%x...\n", i);
 180                                 if(request_region(i, SRAM_PAGESIZE, "sc test")) {
 181                                         pr_debug("  request_region succeeded\n");
 182                                         model = identify_board(i, io[b]);
 183                                         release_region(i, SRAM_PAGESIZE);
 184                                         if (model >= 0) {
 185                                                 pr_debug("  Identified a %s\n",
 186                                                         boardname[model]);
 187                                                 ram[b] = i;
 188                                                 break;
 189                                         }
 190                                         pr_debug("  Unidentifed or inaccessible\n");
 191                                         continue;
 192                                 }
 193                                 pr_debug("  request failed\n");
 194                         }
 195                 }
 196                 /*
 197                  * See if we found free RAM and the board model
 198                  */
 199                 if(!ram[b] || model < 0) {
 200                         /*
 201                          * Nope, there was no place in RAM for the
 202                          * board, or it couldn't be identified
 203                          */
 204                          pr_debug("Failed to find an adapter at 0x%lx\n", ram[b]);
 205                          continue;
 206                 }
 207
 208                 /*
 209                  * Set the board's magic number, memory size and page register
 210                  */
 211                 switch(model) {
 212                 case PRI_BOARD:
 213                         channels = 23;
 214                         magic = 0x20000;
 215                         memsize = 0x100000;
 216                         features = PRI_FEATURES;
 217                         break;
 218
 219                 case BRI_BOARD:
 220                 case POTS_BOARD:
 221                         channels = 2;
 222                         magic = 0x60000;
 223                         memsize = 0x10000;
 224                         features = BRI_FEATURES;
 225                         break;
 226                 }
 227                 switch(ram[b] >> 12 & 0x0F) {
 228                 case 0x0:
 229                         pr_debug("RAM Page register set to EXP_PAGE0\n");
 230                         pgport = EXP_PAGE0;
 231                         break;
 232
 233                 case 0x4:
 234                         pr_debug("RAM Page register set to EXP_PAGE1\n");
 235                         pgport = EXP_PAGE1;
 236                         break;
 237
 238                 case 0x8:
 239                         pr_debug("RAM Page register set to EXP_PAGE2\n");
 240                         pgport = EXP_PAGE2;
 241                         break;
 242
 243                 case 0xC:
 244                         pr_debug("RAM Page register set to EXP_PAGE3\n");
 245                         pgport = EXP_PAGE3;
 246                         break;
 247
 248                 default:
 249                         pr_debug("RAM base address doesn't fall on 16K boundary\n");
 250                         continue;
 251                 }
 252
 253                 pr_debug("current IRQ: %d  b: %d\n",irq[b],b);
 254
 255                 /*
 256                  * Make sure we got an IRQ
 257                  */
 258                 if(!irq[b]) {
 259                         /*
 260                          * No interrupt could be used
 261                          */
 262                         pr_debug("Failed to acquire an IRQ line\n");
 263                         continue;
 264                 }
 265
 266                 /*
 267                  * Horray! We found a board, Make sure we can register
 268                  * it with ISDN4Linux
 269                  */
 270                 interface = kzalloc(sizeof(isdn_if), GFP_KERNEL);
 271                 if (interface == NULL) {
 272                         /*
 273                          * Oops, can't malloc isdn_if
 274                          */
 275                         continue;
 276                 }
 277
 278                 interface->owner = THIS_MODULE;
 279                 interface->hl_hdrlen = 0;
 280                 interface->channels = channels;
 281                 interface->maxbufsize = BUFFER_SIZE;
 282                 interface->features = features;
 283                 interface->writebuf_skb = sndpkt;
 284                 interface->writecmd = NULL;
 285                 interface->command = command;
 286                 strcpy(interface->id, devname);
 287                 interface->id[2] = '0' + cinst;
 288
 289                 /*
 290                  * Allocate the board structure
 291                  */
 292                 sc_adapter[cinst] = kzalloc(sizeof(board), GFP_KERNEL);
 293                 if (sc_adapter[cinst] == NULL) {
 294                         /*
 295                          * Oops, can't alloc memory for the board
 296                          */
 297                         kfree(interface);
 298                         continue;
 299                 }
 300                 spin_lock_init(&sc_adapter[cinst]->lock);
 301
 302                 if(!register_isdn(interface)) {
 303                         /*
 304                          * Oops, couldn't register for some reason
 305                          */
 306                         kfree(interface);
 307                         kfree(sc_adapter[cinst]);
 308                         continue;
 309                 }
 310
 311                 sc_adapter[cinst]->card = interface;
 312                 sc_adapter[cinst]->driverId = interface->channels;
 313                 strcpy(sc_adapter[cinst]->devicename, interface->id);
 314                 sc_adapter[cinst]->nChannels = channels;
 315                 sc_adapter[cinst]->ramsize = memsize;
 316                 sc_adapter[cinst]->shmem_magic = magic;
 317                 sc_adapter[cinst]->shmem_pgport = pgport;
 318                 sc_adapter[cinst]->StartOnReset = 1;
 319
 320                 /*
 321                  * Allocate channels status structures
 322                  */
 323                 sc_adapter[cinst]->channel = kzalloc(sizeof(bchan) * channels, GFP_KERNEL);
 324                 if (sc_adapter[cinst]->channel == NULL) {
 325                         /*
 326                          * Oops, can't alloc memory for the channels
 327                          */
 328                         indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL);      /* Fix me */
 329                         kfree(interface);
 330                         kfree(sc_adapter[cinst]);
 331                         continue;
 332                 }
 333
 334                 /*
 335                  * Lock down the hardware resources
 336                  */
 337                 sc_adapter[cinst]->interrupt = irq[b];
 338                 if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
 339                                 IRQF_DISABLED, interface->id,
 340                                 (void *)(unsigned long) cinst))
 341                 {
 342                         kfree(sc_adapter[cinst]->channel);
 343                         indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL);      /* Fix me */
 344                         kfree(interface);
 345                         kfree(sc_adapter[cinst]);
 346                         continue;
 347
 348                 }
 349                 sc_adapter[cinst]->iobase = io[b];
 350                 for(i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
 351                         sc_adapter[cinst]->ioport[i] = io[b] + i * 0x400;
 352                         request_region(sc_adapter[cinst]->ioport[i], 1,
 353                                         interface->id);
 354                         pr_debug("Requesting I/O Port %#x\n",
 355                                 sc_adapter[cinst]->ioport[i]);
 356                 }
 357                 sc_adapter[cinst]->ioport[IRQ_SELECT] = io[b] + 0x2;
 358                 request_region(sc_adapter[cinst]->ioport[IRQ_SELECT], 1,
 359                                 interface->id);
 360                 pr_debug("Requesting I/O Port %#x\n",
 361                                 sc_adapter[cinst]->ioport[IRQ_SELECT]);
 362                 sc_adapter[cinst]->rambase = ram[b];
 363                 request_region(sc_adapter[cinst]->rambase, SRAM_PAGESIZE,
 364                                 interface->id);
 365
 366                 pr_info("  %s (%d) - %s %d channels IRQ %d, I/O Base 0x%x, RAM Base 0x%lx\n",
 367                         sc_adapter[cinst]->devicename,
 368                         sc_adapter[cinst]->driverId,
 369                         boardname[model], channels, irq[b], io[b], ram[b]);
 370
 371                 /*
 372                  * reset the adapter to put things in motion
 373                  */
 374                 reset(cinst);
 375
 376                 cinst++;
 377                 status = 0;
 378         }
 379         if (status)
 380                 pr_info("Failed to find any adapters, driver unloaded\n");
 381         return status;
 382 }
 383
 384 static void __exit sc_exit(void)
 385 {
 386         int i, j;
 387
 388         for(i = 0 ; i < cinst ; i++) {
 389                 pr_debug("Cleaning up after adapter %d\n", i);
 390                 /*
 391                  * kill the timers
 392                  */
 393                 del_timer(&(sc_adapter[i]->reset_timer));
 394                 del_timer(&(sc_adapter[i]->stat_timer));
 395
 396                 /*
 397                  * Tell I4L we're toast
 398                  */
 399                 indicate_status(i, ISDN_STAT_STOP, 0, NULL);
 400                 indicate_status(i, ISDN_STAT_UNLOAD, 0, NULL);
 401
 402                 /*
 403                  * Release shared RAM
 404                  */
 405                 release_region(sc_adapter[i]->rambase, SRAM_PAGESIZE);
 406
 407                 /*
 408                  * Release the IRQ
 409                  */
 410                 free_irq(sc_adapter[i]->interrupt, NULL);
 411
 412                 /*
 413                  * Reset for a clean start
 414                  */
 415                 outb(0xFF, sc_adapter[i]->ioport[SFT_RESET]);
 416
 417                 /*
 418                  * Release the I/O Port regions
 419                  */
 420                 for(j = 0 ; j < MAX_IO_REGS - 1; j++) {
 421                         release_region(sc_adapter[i]->ioport[j], 1);
 422                         pr_debug("Releasing I/O Port %#x\n",
 423                                 sc_adapter[i]->ioport[j]);
 424                 }
 425                 release_region(sc_adapter[i]->ioport[IRQ_SELECT], 1);
 426                 pr_debug("Releasing I/O Port %#x\n",
 427                         sc_adapter[i]->ioport[IRQ_SELECT]);
 428
 429                 /*
 430                  * Release any memory we alloced
 431                  */
 432                 kfree(sc_adapter[i]->channel);
 433                 kfree(sc_adapter[i]->card);
 434                 kfree(sc_adapter[i]);
 435         }
 436         pr_info("SpellCaster ISA ISDN Adapter Driver Unloaded.\n");
 437 }
 438
 439 static int identify_board(unsigned long rambase, unsigned int iobase)
 440 {
 441         unsigned int pgport;
 442         unsigned long sig;
 443         DualPortMemory *dpm;
 444         RspMessage rcvmsg;
 445         ReqMessage sndmsg;
 446         HWConfig_pl hwci;
 447         int x;
 448
 449         pr_debug("Attempting to identify adapter @ 0x%lx io 0x%x\n",
 450                 rambase, iobase);
 451
 452         /*
 453          * Enable the base pointer
 454          */
 455         outb(rambase >> 12, iobase + 0x2c00);
 456
 457         switch(rambase >> 12 & 0x0F) {
 458         case 0x0:
 459                 pgport = iobase + PG0_OFFSET;
 460                 pr_debug("Page Register offset is 0x%x\n", PG0_OFFSET);
 461                 break;
 462
 463         case 0x4:
 464                 pgport = iobase + PG1_OFFSET;
 465                 pr_debug("Page Register offset is 0x%x\n", PG1_OFFSET);
 466                 break;
 467
 468         case 0x8:
 469                 pgport = iobase + PG2_OFFSET;
 470                 pr_debug("Page Register offset is 0x%x\n", PG2_OFFSET);
 471                 break;
 472
 473         case 0xC:
 474                 pgport = iobase + PG3_OFFSET;
 475                 pr_debug("Page Register offset is 0x%x\n", PG3_OFFSET);
 476                 break;
 477         default:
 478                 pr_debug("Invalid rambase 0x%lx\n", rambase);
 479                 return -1;
 480         }
 481
 482         /*
 483          * Try to identify a PRI card
 484          */
 485         outb(PRI_BASEPG_VAL, pgport);
 486         msleep_interruptible(1000);
 487         sig = readl(rambase + SIG_OFFSET);
 488         pr_debug("Looking for a signature, got 0x%lx\n", sig);
 489         if(sig == SIGNATURE)
 490                 return PRI_BOARD;
 491
 492         /*
 493          * Try to identify a PRI card
 494          */
 495         outb(BRI_BASEPG_VAL, pgport);
 496         msleep_interruptible(1000);
 497         sig = readl(rambase + SIG_OFFSET);
 498         pr_debug("Looking for a signature, got 0x%lx\n", sig);
 499         if(sig == SIGNATURE)
 500                 return BRI_BOARD;
 501
 502         return -1;
 503
 504         /*
 505          * Try to spot a card
 506          */
 507         sig = readl(rambase + SIG_OFFSET);
 508         pr_debug("Looking for a signature, got 0x%lx\n", sig);
 509         if(sig != SIGNATURE)
 510                 return -1;
 511
 512         dpm = (DualPortMemory *) rambase;
 513
 514         memset(&sndmsg, 0, MSG_LEN);
 515         sndmsg.msg_byte_cnt = 3;
 516         sndmsg.type = cmReqType1;
 517         sndmsg.class = cmReqClass0;
 518         sndmsg.code = cmReqHWConfig;
 519         memcpy_toio(&(dpm->req_queue[dpm->req_head++]), &sndmsg, MSG_LEN);
 520         outb(0, iobase + 0x400);
 521         pr_debug("Sent HWConfig message\n");
 522         /*
 523          * Wait for the response
 524          */
 525         x = 0;
 526         while((inb(iobase + FIFOSTAT_OFFSET) & RF_HAS_DATA) && x < 100) {
 527                 schedule_timeout_interruptible(1);
 528                 x++;
 529         }
 530         if(x == 100) {
 531                 pr_debug("Timeout waiting for response\n");
 532                 return -1;
 533         }
 534
 535         memcpy_fromio(&rcvmsg, &(dpm->rsp_queue[dpm->rsp_tail]), MSG_LEN);
 536         pr_debug("Got HWConfig response, status = 0x%x\n", rcvmsg.rsp_status);
 537         memcpy(&hwci, &(rcvmsg.msg_data.HWCresponse), sizeof(HWConfig_pl));
 538         pr_debug("Hardware Config: Interface: %s, RAM Size: %ld, Serial: %s\n"
 539                  "                 Part: %s, Rev: %s\n",
 540                  hwci.st_u_sense ? "S/T" : "U", hwci.ram_size,
 541                  hwci.serial_no, hwci.part_no, hwci.rev_no);
 542
 543         if(!strncmp(PRI_PARTNO, hwci.part_no, 6))
 544                 return PRI_BOARD;
 545         if(!strncmp(BRI_PARTNO, hwci.part_no, 6))
 546                 return BRI_BOARD;
 547
 548         return -1;
 549 }
 550
 551 module_init(sc_init);
 552 module_exit(sc_exit);