linux/drivers/scsi/pas16.c
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   1#define AUTOSENSE
   2#define PSEUDO_DMA
   3#define FOO
   4#define UNSAFE  /* Not unsafe for PAS16 -- use it */
   5#define PDEBUG 0
   6
   7/*
   8 * This driver adapted from Drew Eckhardt's Trantor T128 driver
   9 *
  10 * Copyright 1993, Drew Eckhardt
  11 *      Visionary Computing
  12 *      (Unix and Linux consulting and custom programming)
  13 *      drew@colorado.edu
  14 *      +1 (303) 666-5836
  15 *
  16 *  ( Based on T128 - DISTRIBUTION RELEASE 3. ) 
  17 *
  18 * Modified to work with the Pro Audio Spectrum/Studio 16
  19 * by John Weidman.
  20 *
  21 *
  22 * For more information, please consult 
  23 *
  24 * Media Vision
  25 * (510) 770-8600
  26 * (800) 348-7116
  27 * 
  28 * and 
  29 *
  30 * NCR 5380 Family
  31 * SCSI Protocol Controller
  32 * Databook
  33 *
  34 * NCR Microelectronics
  35 * 1635 Aeroplaza Drive
  36 * Colorado Springs, CO 80916
  37 * 1+ (719) 578-3400
  38 * 1+ (800) 334-5454
  39 */
  40
  41/*
  42 * Options : 
  43 * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
  44 *      for commands that return with a CHECK CONDITION status. 
  45 *
  46 * LIMIT_TRANSFERSIZE - if defined, limit the pseudo-dma transfers to 512
  47 *      bytes at a time.  Since interrupts are disabled by default during
  48 *      these transfers, we might need this to give reasonable interrupt
  49 *      service time if the transfer size gets too large.
  50 *
  51 * PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance
  52 * increase compared to polled I/O.
  53 *
  54 * PARITY - enable parity checking.  Not supported.
  55 * 
  56 * SCSI2 - enable support for SCSI-II tagged queueing.  Untested.
  57 *
  58 * UNSAFE - leave interrupts enabled during pseudo-DMA transfers.  This
  59 *          parameter comes from the NCR5380 code.  It is NOT unsafe with
  60 *          the PAS16 and you should use it.  If you don't you will have
  61 *          a problem with dropped characters during high speed
  62 *          communications during SCSI transfers.  If you really don't
  63 *          want to use UNSAFE you can try defining LIMIT_TRANSFERSIZE or
  64 *          twiddle with the transfer size in the high level code.
  65 *
  66 * USLEEP - enable support for devices that don't disconnect.  Untested.
  67 *
  68 * The card is detected and initialized in one of several ways : 
  69 * 1.  Autoprobe (default) - There are many different models of
  70 *     the Pro Audio Spectrum/Studio 16, and I only have one of
  71 *     them, so this may require a little tweaking.  An interrupt
  72 *     is triggered to autoprobe for the interrupt line.  Note:
  73 *     with the newer model boards, the interrupt is set via
  74 *     software after reset using the default_irq for the
  75 *     current board number.
  76 *
  77 * 2.  With command line overrides - pas16=port,irq may be 
  78 *     used on the LILO command line to override the defaults.
  79 *
  80 * 3.  With the PAS16_OVERRIDE compile time define.  This is 
  81 *     specified as an array of address, irq tuples.  Ie, for
  82 *     one board at the default 0x388 address, IRQ10, I could say 
  83 *     -DPAS16_OVERRIDE={{0x388, 10}}
  84 *     NOTE:  Untested.
  85 *      
  86 * 4.  When included as a module, with arguments passed on the command line:
  87 *         pas16_irq=xx         the interrupt
  88 *         pas16_addr=xx        the port
  89 *     e.g. "modprobe pas16 pas16_addr=0x388 pas16_irq=5"
  90 *
  91 *     Note that if the override methods are used, place holders must
  92 *     be specified for other boards in the system.
  93 *
  94 *
  95 * Configuration notes :
  96 *   The current driver does not support interrupt sharing with the
  97 *   sound portion of the card.  If you use the same irq for the
  98 *   scsi port and sound you will have problems.  Either use
  99 *   a different irq for the scsi port or don't use interrupts
 100 *   for the scsi port.
 101 *
 102 *   If you have problems with your card not being recognized, use
 103 *   the LILO command line override.  Try to get it recognized without
 104 *   interrupts.  Ie, for a board at the default 0x388 base port,
 105 *   boot: linux pas16=0x388,255
 106 *
 107 *   SCSI_IRQ_NONE (255) should be specified for no interrupt,
 108 *   IRQ_AUTO (254) to autoprobe for an IRQ line if overridden
 109 *   on the command line.
 110 *
 111 *   (IRQ_AUTO == 254, SCSI_IRQ_NONE == 255 in NCR5380.h)
 112 */
 113 
 114#include <linux/module.h>
 115
 116#include <linux/signal.h>
 117#include <linux/proc_fs.h>
 118#include <asm/io.h>
 119#include <asm/dma.h>
 120#include <linux/blkdev.h>
 121#include <linux/delay.h>
 122#include <linux/interrupt.h>
 123#include <linux/stat.h>
 124#include <linux/init.h>
 125
 126#include "scsi.h"
 127#include <scsi/scsi_host.h>
 128#include "pas16.h"
 129#define AUTOPROBE_IRQ
 130#include "NCR5380.h"
 131
 132
 133static int pas_maxi = 0;
 134static int pas_wmaxi = 0;
 135static unsigned short pas16_addr = 0;
 136static int pas16_irq = 0;
 137 
 138
 139static const int scsi_irq_translate[] =
 140        { 0,  0,  1,  2,  3,  4,  5,  6, 0,  0,  7,  8,  9,  0, 10, 11 };
 141
 142/* The default_irqs array contains values used to set the irq into the
 143 * board via software (as must be done on newer model boards without
 144 * irq jumpers on the board).  The first value in the array will be
 145 * assigned to logical board 0, the next to board 1, etc.
 146 */
 147static int default_irqs[] __initdata =
 148        {  PAS16_DEFAULT_BOARD_1_IRQ,
 149           PAS16_DEFAULT_BOARD_2_IRQ,
 150           PAS16_DEFAULT_BOARD_3_IRQ,
 151           PAS16_DEFAULT_BOARD_4_IRQ
 152        };
 153
 154static struct override {
 155    unsigned short io_port;
 156    int  irq;
 157} overrides
 158#ifdef PAS16_OVERRIDE
 159    [] __initdata = PAS16_OVERRIDE;
 160#else
 161    [4] __initdata = {{0,IRQ_AUTO}, {0,IRQ_AUTO}, {0,IRQ_AUTO},
 162        {0,IRQ_AUTO}};
 163#endif
 164
 165#define NO_OVERRIDES ARRAY_SIZE(overrides)
 166
 167static struct base {
 168    unsigned short io_port;
 169    int noauto;
 170} bases[] __initdata =
 171        { {PAS16_DEFAULT_BASE_1, 0},
 172          {PAS16_DEFAULT_BASE_2, 0},
 173          {PAS16_DEFAULT_BASE_3, 0},
 174          {PAS16_DEFAULT_BASE_4, 0}
 175        };
 176
 177#define NO_BASES ARRAY_SIZE(bases)
 178
 179static const unsigned short  pas16_offset[ 8 ] =
 180    {
 181        0x1c00,    /* OUTPUT_DATA_REG */
 182        0x1c01,    /* INITIATOR_COMMAND_REG */
 183        0x1c02,    /* MODE_REG */
 184        0x1c03,    /* TARGET_COMMAND_REG */
 185        0x3c00,    /* STATUS_REG ro, SELECT_ENABLE_REG wo */
 186        0x3c01,    /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
 187        0x3c02,    /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
 188                    * START_DMA_TARGET_RECEIVE_REG wo
 189                    */
 190        0x3c03,    /* RESET_PARITY_INTERRUPT_REG ro,
 191                    * START_DMA_INITIATOR_RECEIVE_REG wo
 192                    */
 193    };
 194/*----------------------------------------------------------------*/
 195/* the following will set the monitor border color (useful to find
 196 where something crashed or gets stuck at */
 197/* 1 = blue
 198 2 = green
 199 3 = cyan
 200 4 = red
 201 5 = magenta
 202 6 = yellow
 203 7 = white
 204*/
 205#if 1
 206#define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);}
 207#else
 208#define rtrc(i) {}
 209#endif
 210
 211
 212/*
 213 * Function : enable_board( int  board_num, unsigned short port )
 214 *
 215 * Purpose :  set address in new model board
 216 *
 217 * Inputs : board_num - logical board number 0-3, port - base address
 218 *
 219 */
 220
 221static void __init
 222        enable_board( int  board_num,  unsigned short port )
 223{
 224    outb( 0xbc + board_num, MASTER_ADDRESS_PTR );
 225    outb( port >> 2, MASTER_ADDRESS_PTR );
 226}
 227
 228
 229
 230/*
 231 * Function : init_board( unsigned short port, int irq )
 232 *
 233 * Purpose :  Set the board up to handle the SCSI interface
 234 *
 235 * Inputs : port - base address of the board,
 236 *          irq - irq to assign to the SCSI port
 237 *          force_irq - set it even if it conflicts with sound driver
 238 *
 239 */
 240
 241static void __init 
 242        init_board( unsigned short io_port, int irq, int force_irq )
 243{
 244        unsigned int    tmp;
 245        unsigned int    pas_irq_code;
 246
 247        /* Initialize the SCSI part of the board */
 248
 249        outb( 0x30, io_port + P_TIMEOUT_COUNTER_REG );  /* Timeout counter */
 250        outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET );   /* Reset TC */
 251        outb( 0x01, io_port + WAIT_STATE );   /* 1 Wait state */
 252
 253        NCR5380_read( RESET_PARITY_INTERRUPT_REG );
 254
 255        /* Set the SCSI interrupt pointer without mucking up the sound
 256         * interrupt pointer in the same byte.
 257         */
 258        pas_irq_code = ( irq < 16 ) ? scsi_irq_translate[irq] : 0;
 259        tmp = inb( io_port + IO_CONFIG_3 );
 260
 261        if( (( tmp & 0x0f ) == pas_irq_code) && pas_irq_code > 0 
 262            && !force_irq )
 263        {
 264            printk( "pas16: WARNING: Can't use same irq as sound "
 265                    "driver -- interrupts disabled\n" );
 266            /* Set up the drive parameters, disable 5380 interrupts */
 267            outb( 0x4d, io_port + SYS_CONFIG_4 );
 268        }
 269        else
 270        {
 271            tmp = (  tmp & 0x0f ) | ( pas_irq_code << 4 );
 272            outb( tmp, io_port + IO_CONFIG_3 );
 273
 274            /* Set up the drive parameters and enable 5380 interrupts */
 275            outb( 0x6d, io_port + SYS_CONFIG_4 );
 276        }
 277}
 278
 279
 280/*
 281 * Function : pas16_hw_detect( unsigned short board_num )
 282 *
 283 * Purpose : determine if a pas16 board is present
 284 * 
 285 * Inputs : board_num - logical board number ( 0 - 3 )
 286 *
 287 * Returns : 0 if board not found, 1 if found.
 288 */
 289
 290static int __init 
 291     pas16_hw_detect( unsigned short  board_num )
 292{
 293    unsigned char       board_rev, tmp;
 294    unsigned short      io_port = bases[ board_num ].io_port;
 295
 296    /* See if we can find a PAS16 board at the address associated
 297     * with this logical board number.
 298     */
 299
 300    /* First, attempt to take a newer model board out of reset and
 301     * give it a base address.  This shouldn't affect older boards.
 302     */
 303    enable_board( board_num, io_port );
 304
 305    /* Now see if it looks like a PAS16 board */
 306    board_rev = inb( io_port + PCB_CONFIG );
 307
 308    if( board_rev == 0xff )
 309        return 0;
 310
 311    tmp = board_rev ^ 0xe0;
 312
 313    outb( tmp, io_port + PCB_CONFIG );
 314    tmp = inb( io_port + PCB_CONFIG );
 315    outb( board_rev, io_port + PCB_CONFIG );
 316
 317    if( board_rev != tmp )      /* Not a PAS-16 */
 318        return 0;
 319
 320    if( ( inb( io_port + OPERATION_MODE_1 ) & 0x03 ) != 0x03 ) 
 321        return 0;       /* return if no SCSI interface found */
 322
 323    /* Mediavision has some new model boards that return ID bits
 324     * that indicate a SCSI interface, but they're not (LMS).  We'll
 325     * put in an additional test to try to weed them out.
 326     */
 327
 328    outb( 0x01, io_port + WAIT_STATE );         /* 1 Wait state */
 329    NCR5380_write( MODE_REG, 0x20 );            /* Is it really SCSI? */
 330    if( NCR5380_read( MODE_REG ) != 0x20 )      /* Write to a reg.    */
 331        return 0;                               /* and try to read    */
 332    NCR5380_write( MODE_REG, 0x00 );            /* it back.           */
 333    if( NCR5380_read( MODE_REG ) != 0x00 )
 334        return 0;
 335
 336    return 1;
 337}
 338
 339
 340/*
 341 * Function : pas16_setup(char *str, int *ints)
 342 *
 343 * Purpose : LILO command line initialization of the overrides array,
 344 * 
 345 * Inputs : str - unused, ints - array of integer parameters with ints[0]
 346 *      equal to the number of ints.
 347 *
 348 */
 349
 350void __init pas16_setup(char *str, int *ints)
 351{
 352    static int commandline_current = 0;
 353    int i;
 354    if (ints[0] != 2) 
 355        printk("pas16_setup : usage pas16=io_port,irq\n");
 356    else 
 357        if (commandline_current < NO_OVERRIDES) {
 358            overrides[commandline_current].io_port = (unsigned short) ints[1];
 359            overrides[commandline_current].irq = ints[2];
 360            for (i = 0; i < NO_BASES; ++i)
 361                if (bases[i].io_port == (unsigned short) ints[1]) {
 362                    bases[i].noauto = 1;
 363                    break;
 364                }
 365            ++commandline_current;
 366        }
 367}
 368
 369/* 
 370 * Function : int pas16_detect(struct scsi_host_template * tpnt)
 371 *
 372 * Purpose : detects and initializes PAS16 controllers
 373 *      that were autoprobed, overridden on the LILO command line, 
 374 *      or specified at compile time.
 375 *
 376 * Inputs : tpnt - template for this SCSI adapter.
 377 * 
 378 * Returns : 1 if a host adapter was found, 0 if not.
 379 *
 380 */
 381
 382int __init pas16_detect(struct scsi_host_template * tpnt)
 383{
 384    static int current_override = 0;
 385    static unsigned short current_base = 0;
 386    struct Scsi_Host *instance;
 387    unsigned short io_port;
 388    int  count;
 389
 390    tpnt->proc_name = "pas16";
 391    tpnt->proc_info = &pas16_proc_info;
 392
 393    if (pas16_addr != 0) {
 394        overrides[0].io_port = pas16_addr;
 395        /*
 396        *  This is how we avoid seeing more than
 397        *  one host adapter at the same I/O port.
 398        *  Cribbed shamelessly from pas16_setup().
 399        */
 400        for (count = 0; count < NO_BASES; ++count)
 401            if (bases[count].io_port == pas16_addr) {
 402                    bases[count].noauto = 1;
 403                    break;
 404        }
 405    }
 406    if (pas16_irq != 0)
 407        overrides[0].irq = pas16_irq;
 408
 409    for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
 410        io_port = 0;
 411
 412        if (overrides[current_override].io_port)
 413        {
 414            io_port = overrides[current_override].io_port;
 415            enable_board( current_override, io_port );
 416            init_board( io_port, overrides[current_override].irq, 1 );
 417        }
 418        else
 419            for (; !io_port && (current_base < NO_BASES); ++current_base) {
 420#if (PDEBUG & PDEBUG_INIT)
 421    printk("scsi-pas16 : probing io_port %04x\n", (unsigned int) bases[current_base].io_port);
 422#endif
 423                if ( !bases[current_base].noauto &&
 424                     pas16_hw_detect( current_base ) ){
 425                        io_port = bases[current_base].io_port;
 426                        init_board( io_port, default_irqs[ current_base ], 0 ); 
 427#if (PDEBUG & PDEBUG_INIT)
 428                        printk("scsi-pas16 : detected board.\n");
 429#endif
 430                }
 431    }
 432
 433
 434#if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
 435        printk("scsi-pas16 : io_port = %04x\n", (unsigned int) io_port);
 436#endif
 437
 438        if (!io_port)
 439            break;
 440
 441        instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
 442        if(instance == NULL)
 443                break;
 444                
 445        instance->io_port = io_port;
 446
 447        NCR5380_init(instance, 0);
 448
 449        if (overrides[current_override].irq != IRQ_AUTO)
 450            instance->irq = overrides[current_override].irq;
 451        else 
 452            instance->irq = NCR5380_probe_irq(instance, PAS16_IRQS);
 453
 454        if (instance->irq != SCSI_IRQ_NONE) 
 455            if (request_irq(instance->irq, pas16_intr, IRQF_DISABLED,
 456                            "pas16", instance)) {
 457                printk("scsi%d : IRQ%d not free, interrupts disabled\n", 
 458                    instance->host_no, instance->irq);
 459                instance->irq = SCSI_IRQ_NONE;
 460            } 
 461
 462        if (instance->irq == SCSI_IRQ_NONE) {
 463            printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
 464            printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
 465            /* Disable 5380 interrupts, leave drive params the same */
 466            outb( 0x4d, io_port + SYS_CONFIG_4 );
 467            outb( (inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3 );
 468        }
 469
 470#if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
 471        printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
 472#endif
 473
 474        printk("scsi%d : at 0x%04x", instance->host_no, (int) 
 475            instance->io_port);
 476        if (instance->irq == SCSI_IRQ_NONE)
 477            printk (" interrupts disabled");
 478        else 
 479            printk (" irq %d", instance->irq);
 480        printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d",
 481            CAN_QUEUE, CMD_PER_LUN, PAS16_PUBLIC_RELEASE);
 482        NCR5380_print_options(instance);
 483        printk("\n");
 484
 485        ++current_override;
 486        ++count;
 487    }
 488    return count;
 489}
 490
 491/*
 492 * Function : int pas16_biosparam(Disk *disk, struct block_device *dev, int *ip)
 493 *
 494 * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for 
 495 *      the specified device / size.
 496 * 
 497 * Inputs : size = size of device in sectors (512 bytes), dev = block device
 498 *      major / minor, ip[] = {heads, sectors, cylinders}  
 499 *
 500 * Returns : always 0 (success), initializes ip
 501 *      
 502 */
 503
 504/* 
 505 * XXX Most SCSI boards use this mapping, I could be incorrect.  Some one
 506 * using hard disks on a trantor should verify that this mapping corresponds
 507 * to that used by the BIOS / ASPI driver by running the linux fdisk program
 508 * and matching the H_C_S coordinates to what DOS uses.
 509 */
 510
 511int pas16_biosparam(struct scsi_device *sdev, struct block_device *dev,
 512                sector_t capacity, int * ip)
 513{
 514  int size = capacity;
 515  ip[0] = 64;
 516  ip[1] = 32;
 517  ip[2] = size >> 11;           /* I think I have it as /(32*64) */
 518  if( ip[2] > 1024 ) {          /* yes, >, not >= */
 519        ip[0]=255;
 520        ip[1]=63;
 521        ip[2]=size/(63*255);
 522        if( ip[2] > 1023 )      /* yes >1023... */
 523                ip[2] = 1023;
 524  }
 525
 526  return 0;
 527}
 528
 529/*
 530 * Function : int NCR5380_pread (struct Scsi_Host *instance, 
 531 *      unsigned char *dst, int len)
 532 *
 533 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to 
 534 *      dst
 535 * 
 536 * Inputs : dst = destination, len = length in bytes
 537 *
 538 * Returns : 0 on success, non zero on a failure such as a watchdog 
 539 *      timeout.
 540 */
 541
 542static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
 543    int len) {
 544    register unsigned char  *d = dst;
 545    register unsigned short reg = (unsigned short) (instance->io_port + 
 546        P_DATA_REG_OFFSET);
 547    register int i = len;
 548    int ii = 0;
 549
 550    while ( !(inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY) )
 551         ++ii;
 552
 553    insb( reg, d, i );
 554
 555    if ( inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
 556        outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
 557        printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
 558            instance->host_no);
 559        return -1;
 560    }
 561   if (ii > pas_maxi)
 562      pas_maxi = ii;
 563    return 0;
 564}
 565
 566/*
 567 * Function : int NCR5380_pwrite (struct Scsi_Host *instance, 
 568 *      unsigned char *src, int len)
 569 *
 570 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
 571 *      src
 572 * 
 573 * Inputs : src = source, len = length in bytes
 574 *
 575 * Returns : 0 on success, non zero on a failure such as a watchdog 
 576 *      timeout.
 577 */
 578
 579static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
 580    int len) {
 581    register unsigned char *s = src;
 582    register unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
 583    register int i = len;
 584    int ii = 0;
 585
 586    while ( !((inb(instance->io_port + P_STATUS_REG_OFFSET)) & P_ST_RDY) )
 587         ++ii;
 588 
 589    outsb( reg, s, i );
 590
 591    if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
 592        outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
 593        printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
 594            instance->host_no);
 595        return -1;
 596    }
 597    if (ii > pas_maxi)
 598         pas_wmaxi = ii;
 599    return 0;
 600}
 601
 602#include "NCR5380.c"
 603
 604static int pas16_release(struct Scsi_Host *shost)
 605{
 606        if (shost->irq)
 607                free_irq(shost->irq, shost);
 608        NCR5380_exit(shost);
 609        if (shost->dma_channel != 0xff)
 610                free_dma(shost->dma_channel);
 611        if (shost->io_port && shost->n_io_port)
 612                release_region(shost->io_port, shost->n_io_port);
 613        scsi_unregister(shost);
 614        return 0;
 615}
 616
 617static struct scsi_host_template driver_template = {
 618        .name           = "Pro Audio Spectrum-16 SCSI",
 619        .detect         = pas16_detect,
 620        .release        = pas16_release,
 621        .queuecommand   = pas16_queue_command,
 622        .eh_abort_handler = pas16_abort,
 623        .eh_bus_reset_handler = pas16_bus_reset,
 624        .bios_param     = pas16_biosparam, 
 625        .can_queue      = CAN_QUEUE,
 626        .this_id        = 7,
 627        .sg_tablesize   = SG_ALL,
 628        .cmd_per_lun    = CMD_PER_LUN,
 629        .use_clustering = DISABLE_CLUSTERING,
 630};
 631#include "scsi_module.c"
 632
 633#ifdef MODULE
 634module_param(pas16_addr, ushort, 0);
 635module_param(pas16_irq, int, 0);
 636#endif
 637MODULE_LICENSE("GPL");
 638
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