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