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