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 static const char version[] = "2.0b1";
  24
  25 static 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 extern irqreturn_t interrupt_handler(int, void *);
  39 extern int sndpkt(int, int, int, struct sk_buff *);
  40 extern int command(isdn_ctrl *);
  41 extern int indicate_status(int, int, ulong, char*);
  42 extern int reset(int);
  43
  44 static int identify_board(unsigned long, unsigned int);
  45
  46 static int __init sc_init(void)
  47 {
  48         int b = -1;
  49         int i, j;
  50         int status = -ENODEV;
  51
  52         unsigned long memsize = 0;
  53         unsigned long features = 0;
  54         isdn_if *interface;
  55         unsigned char channels;
  56         unsigned char pgport;
  57         unsigned long magic;
  58         int model;
  59         int last_base = IOBASE_MIN;
  60         int probe_exhasted = 0;
  61
  62 #ifdef MODULE
  63         pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s Loaded\n", version);
  64 #else
  65         pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s\n", version);
  66 #endif
  67         pr_info("Copyright (C) 1996 SpellCaster Telecommunications Inc.\n");
  68
  69         while(b++ < MAX_CARDS - 1) {
  70                 pr_debug("Probing for adapter #%d\n", b);
  71                 /*
  72                  * Initialize reusable variables
  73                  */
  74                 model = -1;
  75                 magic = 0;
  76                 channels = 0;
  77                 pgport = 0;
  78
  79                 /*
  80                  * See if we should probe for IO base
  81                  */
  82                 pr_debug("I/O Base for board %d is 0x%x, %s probe\n", b, io[b],
  83                         io[b] == 0 ? "will" : "won't");
  84                 if(io[b]) {
  85                         /*
  86                          * No, I/O Base has been provided
  87                          */
  88                         for (i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
  89                                 if(!request_region(io[b] + i * 0x400, 1, "sc test")) {
  90                                         pr_debug("request_region for 0x%x failed\n", io[b] + i * 0x400);
  91                                         io[b] = 0;
  92                                         break;
  93                                 } else
  94                                         release_region(io[b] + i * 0x400, 1);
  95                         }
  96
  97                         /*
  98                          * Confirm the I/O Address with a test
  99                          */
 100                         if(io[b] == 0) {
 101                                 pr_debug("I/O Address invalid.\n");
 102                                 continue;
 103                         }
 104
 105                         outb(0x18, io[b] + 0x400 * EXP_PAGE0);
 106                         if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
 107                                 pr_debug("I/O Base 0x%x fails test\n",
 108                                          io[b] + 0x400 * EXP_PAGE0);
 109                                 continue;
 110                         }
 111                 }
 112                 else {
 113                         /*
 114                          * Yes, probe for I/O Base
 115                          */
 116                         if(probe_exhasted) {
 117                                 pr_debug("All probe addresses exhasted, skipping\n");
 118                                 continue;
 119                         }
 120                         pr_debug("Probing for I/O...\n");
 121                         for (i = last_base ; i <= IOBASE_MAX ; i += IOBASE_OFFSET) {
 122                                 int found_io = 1;
 123                                 if (i == IOBASE_MAX) {
 124                                         probe_exhasted = 1; /* No more addresses to probe */
 125                                         pr_debug("End of Probes\n");
 126                                 }
 127                                 last_base = i + IOBASE_OFFSET;
 128                                 pr_debug("  checking 0x%x...", i);
 129                                 for ( j = 0 ; j < MAX_IO_REGS - 1 ; j++) {
 130                                         if(!request_region(i + j * 0x400, 1, "sc test")) {
 131                                                 pr_debug("Failed\n");
 132                                                 found_io = 0;
 133                                                 break;
 134                                         } else
 135                                                 release_region(i + j * 0x400, 1);
 136                                 }
 137
 138                                 if(found_io) {
 139                                         io[b] = i;
 140                                         outb(0x18, io[b] + 0x400 * EXP_PAGE0);
 141                                         if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
 142                                                 pr_debug("Failed by test\n");
 143                                                 continue;
 144                                         }
 145                                         pr_debug("Passed\n");
 146                                         break;
 147                                 }
 148                         }
 149                         if(probe_exhasted) {
 150                                 continue;
 151                         }
 152                 }
 153
 154                 /*
 155                  * See if we should probe for shared RAM
 156                  */
 157                 if(do_reset) {
 158                         pr_debug("Doing a SAFE probe reset\n");
 159                         outb(0xFF, io[b] + RESET_OFFSET);
 160                         msleep_interruptible(10000);
 161                 }
 162                 pr_debug("RAM Base for board %d is 0x%lx, %s probe\n", b,
 163                         ram[b], ram[b] == 0 ? "will" : "won't");
 164
 165                 if(ram[b]) {
 166                         /*
 167                          * No, the RAM base has been provided
 168                          * Just look for a signature and ID the
 169                          * board model
 170                          */
 171                         if(request_region(ram[b], SRAM_PAGESIZE, "sc test")) {
 172                                 pr_debug("request_region for RAM base 0x%lx succeeded\n", ram[b]);
 173                                 model = identify_board(ram[b], io[b]);
 174                                 release_region(ram[b], SRAM_PAGESIZE);
 175                         }
 176                 }
 177                 else {
 178                         /*
 179                          * Yes, probe for free RAM and look for
 180                          * a signature and id the board model
 181                          */
 182                         for (i = SRAM_MIN ; i < SRAM_MAX ; i += SRAM_PAGESIZE) {
 183                                 pr_debug("Checking RAM address 0x%x...\n", i);
 184                                 if(request_region(i, SRAM_PAGESIZE, "sc test")) {
 185                                         pr_debug("  request_region succeeded\n");
 186                                         model = identify_board(i, io[b]);
 187                                         release_region(i, SRAM_PAGESIZE);
 188                                         if (model >= 0) {
 189                                                 pr_debug("  Identified a %s\n",
 190                                                         boardname[model]);
 191                                                 ram[b] = i;
 192                                                 break;
 193                                         }
 194                                         pr_debug("  Unidentifed or inaccessible\n");
 195                                         continue;
 196                                 }
 197                                 pr_debug("  request failed\n");
 198                         }
 199                 }
 200                 /*
 201                  * See if we found free RAM and the board model
 202                  */
 203                 if(!ram[b] || model < 0) {
 204                         /*
 205                          * Nope, there was no place in RAM for the
 206                          * board, or it couldn't be identified
 207                          */
 208                          pr_debug("Failed to find an adapter at 0x%lx\n", ram[b]);
 209                          continue;
 210                 }
 211
 212                 /*
 213                  * Set the board's magic number, memory size and page register
 214                  */
 215                 switch(model) {
 216                 case PRI_BOARD:
 217                         channels = 23;
 218                         magic = 0x20000;
 219                         memsize = 0x100000;
 220                         features = PRI_FEATURES;
 221                         break;
 222
 223                 case BRI_BOARD:
 224                 case POTS_BOARD:
 225                         channels = 2;
 226                         magic = 0x60000;
 227                         memsize = 0x10000;
 228                         features = BRI_FEATURES;
 229                         break;
 230                 }
 231                 switch(ram[b] >> 12 & 0x0F) {
 232                 case 0x0:
 233                         pr_debug("RAM Page register set to EXP_PAGE0\n");
 234                         pgport = EXP_PAGE0;
 235                         break;
 236
 237                 case 0x4:
 238                         pr_debug("RAM Page register set to EXP_PAGE1\n");
 239                         pgport = EXP_PAGE1;
 240                         break;
 241
 242                 case 0x8:
 243                         pr_debug("RAM Page register set to EXP_PAGE2\n");
 244                         pgport = EXP_PAGE2;
 245                         break;
 246
 247                 case 0xC:
 248                         pr_debug("RAM Page register set to EXP_PAGE3\n");
 249                         pgport = EXP_PAGE3;
 250                         break;
 251
 252                 default:
 253                         pr_debug("RAM base address doesn't fall on 16K boundary\n");
 254                         continue;
 255                 }
 256
 257                 pr_debug("current IRQ: %d  b: %d\n",irq[b],b);
 258
 259                 /*
 260                  * Make sure we got an IRQ
 261                  */
 262                 if(!irq[b]) {
 263                         /*
 264                          * No interrupt could be used
 265                          */
 266                         pr_debug("Failed to acquire an IRQ line\n");
 267                         continue;
 268                 }
 269
 270                 /*
 271                  * Horray! We found a board, Make sure we can register
 272                  * it with ISDN4Linux
 273                  */
 274                 interface = kmalloc(sizeof(isdn_if), GFP_KERNEL);
 275                 if (interface == NULL) {
 276                         /*
 277                          * Oops, can't malloc isdn_if
 278                          */
 279                         continue;
 280                 }
 281                 memset(interface, 0, sizeof(isdn_if));
 282
 283                 interface->owner = THIS_MODULE;
 284                 interface->hl_hdrlen = 0;
 285                 interface->channels = channels;
 286                 interface->maxbufsize = BUFFER_SIZE;
 287                 interface->features = features;
 288                 interface->writebuf_skb = sndpkt;
 289                 interface->writecmd = NULL;
 290                 interface->command = command;
 291                 strcpy(interface->id, devname);
 292                 interface->id[2] = '0' + cinst;
 293
 294                 /*
 295                  * Allocate the board structure
 296                  */
 297                 sc_adapter[cinst] = kmalloc(sizeof(board), GFP_KERNEL);
 298                 if (sc_adapter[cinst] == NULL) {
 299                         /*
 300                          * Oops, can't alloc memory for the board
 301                          */
 302                         kfree(interface);
 303                         continue;
 304                 }
 305                 memset(sc_adapter[cinst], 0, sizeof(board));
 306                 spin_lock_init(&sc_adapter[cinst]->lock);
 307
 308                 if(!register_isdn(interface)) {
 309                         /*
 310                          * Oops, couldn't register for some reason
 311                          */
 312                         kfree(interface);
 313                         kfree(sc_adapter[cinst]);
 314                         continue;
 315                 }
 316
 317                 sc_adapter[cinst]->card = interface;
 318                 sc_adapter[cinst]->driverId = interface->channels;
 319                 strcpy(sc_adapter[cinst]->devicename, interface->id);
 320                 sc_adapter[cinst]->nChannels = channels;
 321                 sc_adapter[cinst]->ramsize = memsize;
 322                 sc_adapter[cinst]->shmem_magic = magic;
 323                 sc_adapter[cinst]->shmem_pgport = pgport;
 324                 sc_adapter[cinst]->StartOnReset = 1;
 325
 326                 /*
 327                  * Allocate channels status structures
 328                  */
 329                 sc_adapter[cinst]->channel = kmalloc(sizeof(bchan) * channels, GFP_KERNEL);
 330                 if (sc_adapter[cinst]->channel == NULL) {
 331                         /*
 332                          * Oops, can't alloc memory for the channels
 333                          */
 334                         indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL);      /* Fix me */
 335                         kfree(interface);
 336                         kfree(sc_adapter[cinst]);
 337                         continue;
 338                 }
 339                 memset(sc_adapter[cinst]->channel, 0, sizeof(bchan) * channels);
 340
 341                 /*
 342                  * Lock down the hardware resources
 343                  */
 344                 sc_adapter[cinst]->interrupt = irq[b];
 345                 if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
 346                                 IRQF_DISABLED, interface->id, NULL))
 347                 {
 348                         kfree(sc_adapter[cinst]->channel);
 349                         indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL);      /* Fix me */
 350                         kfree(interface);
 351                         kfree(sc_adapter[cinst]);
 352                         continue;
 353
 354                 }
 355                 sc_adapter[cinst]->iobase = io[b];
 356                 for(i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
 357                         sc_adapter[cinst]->ioport[i] = io[b] + i * 0x400;
 358                         request_region(sc_adapter[cinst]->ioport[i], 1,
 359                                         interface->id);
 360                         pr_debug("Requesting I/O Port %#x\n",
 361                                 sc_adapter[cinst]->ioport[i]);
 362                 }
 363                 sc_adapter[cinst]->ioport[IRQ_SELECT] = io[b] + 0x2;
 364                 request_region(sc_adapter[cinst]->ioport[IRQ_SELECT], 1,
 365                                 interface->id);
 366                 pr_debug("Requesting I/O Port %#x\n",
 367                                 sc_adapter[cinst]->ioport[IRQ_SELECT]);
 368                 sc_adapter[cinst]->rambase = ram[b];
 369                 request_region(sc_adapter[cinst]->rambase, SRAM_PAGESIZE,
 370                                 interface->id);
 371
 372                 pr_info("  %s (%d) - %s %d channels IRQ %d, I/O Base 0x%x, RAM Base 0x%lx\n",
 373                         sc_adapter[cinst]->devicename,
 374                         sc_adapter[cinst]->driverId,
 375                         boardname[model], channels, irq[b], io[b], ram[b]);
 376
 377                 /*
 378                  * reset the adapter to put things in motion
 379                  */
 380                 reset(cinst);
 381
 382                 cinst++;
 383                 status = 0;
 384         }
 385         if (status)
 386                 pr_info("Failed to find any adapters, driver unloaded\n");
 387         return status;
 388 }
 389
 390 static void __exit sc_exit(void)
 391 {
 392         int i, j;
 393
 394         for(i = 0 ; i < cinst ; i++) {
 395                 pr_debug("Cleaning up after adapter %d\n", i);
 396                 /*
 397                  * kill the timers
 398                  */
 399                 del_timer(&(sc_adapter[i]->reset_timer));
 400                 del_timer(&(sc_adapter[i]->stat_timer));
 401
 402                 /*
 403                  * Tell I4L we're toast
 404                  */
 405                 indicate_status(i, ISDN_STAT_STOP, 0, NULL);
 406                 indicate_status(i, ISDN_STAT_UNLOAD, 0, NULL);
 407
 408                 /*
 409                  * Release shared RAM
 410                  */
 411                 release_region(sc_adapter[i]->rambase, SRAM_PAGESIZE);
 412
 413                 /*
 414                  * Release the IRQ
 415                  */
 416                 FREE_IRQ(sc_adapter[i]->interrupt, NULL);
 417
 418                 /*
 419                  * Reset for a clean start
 420                  */
 421                 outb(0xFF, sc_adapter[i]->ioport[SFT_RESET]);
 422
 423                 /*
 424                  * Release the I/O Port regions
 425                  */
 426                 for(j = 0 ; j < MAX_IO_REGS - 1; j++) {
 427                         release_region(sc_adapter[i]->ioport[j], 1);
 428                         pr_debug("Releasing I/O Port %#x\n",
 429                                 sc_adapter[i]->ioport[j]);
 430                 }
 431                 release_region(sc_adapter[i]->ioport[IRQ_SELECT], 1);
 432                 pr_debug("Releasing I/O Port %#x\n",
 433                         sc_adapter[i]->ioport[IRQ_SELECT]);
 434
 435                 /*
 436                  * Release any memory we alloced
 437                  */
 438                 kfree(sc_adapter[i]->channel);
 439                 kfree(sc_adapter[i]->card);
 440                 kfree(sc_adapter[i]);
 441         }
 442         pr_info("SpellCaster ISA ISDN Adapter Driver Unloaded.\n");
 443 }
 444
 445 static int identify_board(unsigned long rambase, unsigned int iobase)
 446 {
 447         unsigned int pgport;
 448         unsigned long sig;
 449         DualPortMemory *dpm;
 450         RspMessage rcvmsg;
 451         ReqMessage sndmsg;
 452         HWConfig_pl hwci;
 453         int x;
 454
 455         pr_debug("Attempting to identify adapter @ 0x%lx io 0x%x\n",
 456                 rambase, iobase);
 457
 458         /*
 459          * Enable the base pointer
 460          */
 461         outb(rambase >> 12, iobase + 0x2c00);
 462
 463         switch(rambase >> 12 & 0x0F) {
 464         case 0x0:
 465                 pgport = iobase + PG0_OFFSET;
 466                 pr_debug("Page Register offset is 0x%x\n", PG0_OFFSET);
 467                 break;
 468
 469         case 0x4:
 470                 pgport = iobase + PG1_OFFSET;
 471                 pr_debug("Page Register offset is 0x%x\n", PG1_OFFSET);
 472                 break;
 473
 474         case 0x8:
 475                 pgport = iobase + PG2_OFFSET;
 476                 pr_debug("Page Register offset is 0x%x\n", PG2_OFFSET);
 477                 break;
 478
 479         case 0xC:
 480                 pgport = iobase + PG3_OFFSET;
 481                 pr_debug("Page Register offset is 0x%x\n", PG3_OFFSET);
 482                 break;
 483         default:
 484                 pr_debug("Invalid rambase 0x%lx\n", rambase);
 485                 return -1;
 486         }
 487
 488         /*
 489          * Try to identify a PRI card
 490          */
 491         outb(PRI_BASEPG_VAL, pgport);
 492         msleep_interruptible(1000);
 493         sig = readl(rambase + SIG_OFFSET);
 494         pr_debug("Looking for a signature, got 0x%lx\n", sig);
 495         if(sig == SIGNATURE)
 496                 return PRI_BOARD;
 497
 498         /*
 499          * Try to identify a PRI card
 500          */
 501         outb(BRI_BASEPG_VAL, pgport);
 502         msleep_interruptible(1000);
 503         sig = readl(rambase + SIG_OFFSET);
 504         pr_debug("Looking for a signature, got 0x%lx\n", sig);
 505         if(sig == SIGNATURE)
 506                 return BRI_BOARD;
 507
 508         return -1;
 509
 510         /*
 511          * Try to spot a card
 512          */
 513         sig = readl(rambase + SIG_OFFSET);
 514         pr_debug("Looking for a signature, got 0x%lx\n", sig);
 515         if(sig != SIGNATURE)
 516                 return -1;
 517
 518         dpm = (DualPortMemory *) rambase;
 519
 520         memset(&sndmsg, 0, MSG_LEN);
 521         sndmsg.msg_byte_cnt = 3;
 522         sndmsg.type = cmReqType1;
 523         sndmsg.class = cmReqClass0;
 524         sndmsg.code = cmReqHWConfig;
 525         memcpy_toio(&(dpm->req_queue[dpm->req_head++]), &sndmsg, MSG_LEN);
 526         outb(0, iobase + 0x400);
 527         pr_debug("Sent HWConfig message\n");
 528         /*
 529          * Wait for the response
 530          */
 531         x = 0;
 532         while((inb(iobase + FIFOSTAT_OFFSET) & RF_HAS_DATA) && x < 100) {
 533                 schedule_timeout_interruptible(1);
 534                 x++;
 535         }
 536         if(x == 100) {
 537                 pr_debug("Timeout waiting for response\n");
 538                 return -1;
 539         }
 540
 541         memcpy_fromio(&rcvmsg, &(dpm->rsp_queue[dpm->rsp_tail]), MSG_LEN);
 542         pr_debug("Got HWConfig response, status = 0x%x\n", rcvmsg.rsp_status);
 543         memcpy(&hwci, &(rcvmsg.msg_data.HWCresponse), sizeof(HWConfig_pl));
 544         pr_debug("Hardware Config: Interface: %s, RAM Size: %ld, Serial: %s\n"
 545                  "                 Part: %s, Rev: %s\n",
 546                  hwci.st_u_sense ? "S/T" : "U", hwci.ram_size,
 547                  hwci.serial_no, hwci.part_no, hwci.rev_no);
 548
 549         if(!strncmp(PRI_PARTNO, hwci.part_no, 6))
 550                 return PRI_BOARD;
 551         if(!strncmp(BRI_PARTNO, hwci.part_no, 6))
 552                 return BRI_BOARD;
 553
 554         return -1;
 555 }
 556
 557 module_init(sc_init);
 558 module_exit(sc_exit);