drivers/scsi/pas16.c

   1 /*
   2  * This driver adapted from Drew Eckhardt's Trantor T128 driver
   3  *
   4  * Copyright 1993, Drew Eckhardt
   5  *      Visionary Computing
   6  *      (Unix and Linux consulting and custom programming)
   7  *      drew@colorado.edu
   8  *      +1 (303) 666-5836
   9  *
  10  *  ( Based on T128 - DISTRIBUTION RELEASE 3. )
  11  *
  12  * Modified to work with the Pro Audio Spectrum/Studio 16
  13  * by John Weidman.
  14  *
  15  *
  16  * For more information, please consult
  17  *
  18  * Media Vision
  19  * (510) 770-8600
  20  * (800) 348-7116
  21  */
  22
  23 /*
  24  * The card is detected and initialized in one of several ways :
  25  * 1.  Autoprobe (default) - There are many different models of
  26  *     the Pro Audio Spectrum/Studio 16, and I only have one of
  27  *     them, so this may require a little tweaking.  An interrupt
  28  *     is triggered to autoprobe for the interrupt line.  Note:
  29  *     with the newer model boards, the interrupt is set via
  30  *     software after reset using the default_irq for the
  31  *     current board number.
  32  *
  33  * 2.  With command line overrides - pas16=port,irq may be
  34  *     used on the LILO command line to override the defaults.
  35  *
  36  * 3.  With the PAS16_OVERRIDE compile time define.  This is
  37  *     specified as an array of address, irq tuples.  Ie, for
  38  *     one board at the default 0x388 address, IRQ10, I could say
  39  *     -DPAS16_OVERRIDE={{0x388, 10}}
  40  *     NOTE:  Untested.
  41  *
  42  * 4.  When included as a module, with arguments passed on the command line:
  43  *         pas16_irq=xx         the interrupt
  44  *         pas16_addr=xx        the port
  45  *     e.g. "modprobe pas16 pas16_addr=0x388 pas16_irq=5"
  46  *
  47  *     Note that if the override methods are used, place holders must
  48  *     be specified for other boards in the system.
  49  *
  50  *
  51  * Configuration notes :
  52  *   The current driver does not support interrupt sharing with the
  53  *   sound portion of the card.  If you use the same irq for the
  54  *   scsi port and sound you will have problems.  Either use
  55  *   a different irq for the scsi port or don't use interrupts
  56  *   for the scsi port.
  57  *
  58  *   If you have problems with your card not being recognized, use
  59  *   the LILO command line override.  Try to get it recognized without
  60  *   interrupts.  Ie, for a board at the default 0x388 base port,
  61  *   boot: linux pas16=0x388,0
  62  *
  63  *   NO_IRQ (0) should be specified for no interrupt,
  64  *   IRQ_AUTO (254) to autoprobe for an IRQ line if overridden
  65  *   on the command line.
  66  */
  67
  68 #include <linux/module.h>
  69
  70 #include <asm/io.h>
  71 #include <asm/dma.h>
  72 #include <linux/blkdev.h>
  73 #include <linux/interrupt.h>
  74 #include <linux/init.h>
  75
  76 #include <scsi/scsi_host.h>
  77 #include "pas16.h"
  78 #define AUTOPROBE_IRQ
  79 #include "NCR5380.h"
  80
  81
  82 static unsigned short pas16_addr;
  83 static int pas16_irq;
  84
  85
  86 static const int scsi_irq_translate[] =
  87         { 0,  0,  1,  2,  3,  4,  5,  6, 0,  0,  7,  8,  9,  0, 10, 11 };
  88
  89 /* The default_irqs array contains values used to set the irq into the
  90  * board via software (as must be done on newer model boards without
  91  * irq jumpers on the board).  The first value in the array will be
  92  * assigned to logical board 0, the next to board 1, etc.
  93  */
  94 static int default_irqs[] __initdata =
  95         {  PAS16_DEFAULT_BOARD_1_IRQ,
  96            PAS16_DEFAULT_BOARD_2_IRQ,
  97            PAS16_DEFAULT_BOARD_3_IRQ,
  98            PAS16_DEFAULT_BOARD_4_IRQ
  99         };
 100
 101 static struct override {
 102     unsigned short io_port;
 103     int  irq;
 104 } overrides
 105 #ifdef PAS16_OVERRIDE
 106     [] __initdata = PAS16_OVERRIDE;
 107 #else
 108     [4] __initdata = {{0,IRQ_AUTO}, {0,IRQ_AUTO}, {0,IRQ_AUTO},
 109         {0,IRQ_AUTO}};
 110 #endif
 111
 112 #define NO_OVERRIDES ARRAY_SIZE(overrides)
 113
 114 static struct base {
 115     unsigned short io_port;
 116     int noauto;
 117 } bases[] __initdata =
 118         { {PAS16_DEFAULT_BASE_1, 0},
 119           {PAS16_DEFAULT_BASE_2, 0},
 120           {PAS16_DEFAULT_BASE_3, 0},
 121           {PAS16_DEFAULT_BASE_4, 0}
 122         };
 123
 124 #define NO_BASES ARRAY_SIZE(bases)
 125
 126 static const unsigned short  pas16_offset[ 8 ] =
 127     {
 128         0x1c00,    /* OUTPUT_DATA_REG */
 129         0x1c01,    /* INITIATOR_COMMAND_REG */
 130         0x1c02,    /* MODE_REG */
 131         0x1c03,    /* TARGET_COMMAND_REG */
 132         0x3c00,    /* STATUS_REG ro, SELECT_ENABLE_REG wo */
 133         0x3c01,    /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
 134         0x3c02,    /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
 135                     * START_DMA_TARGET_RECEIVE_REG wo
 136                     */
 137         0x3c03,    /* RESET_PARITY_INTERRUPT_REG ro,
 138                     * START_DMA_INITIATOR_RECEIVE_REG wo
 139                     */
 140     };
 141
 142
 143 /*
 144  * Function : enable_board( int  board_num, unsigned short port )
 145  *
 146  * Purpose :  set address in new model board
 147  *
 148  * Inputs : board_num - logical board number 0-3, port - base address
 149  *
 150  */
 151
 152 static void __init
 153         enable_board( int  board_num,  unsigned short port )
 154 {
 155     outb( 0xbc + board_num, MASTER_ADDRESS_PTR );
 156     outb( port >> 2, MASTER_ADDRESS_PTR );
 157 }
 158
 159
 160
 161 /*
 162  * Function : init_board( unsigned short port, int irq )
 163  *
 164  * Purpose :  Set the board up to handle the SCSI interface
 165  *
 166  * Inputs : port - base address of the board,
 167  *          irq - irq to assign to the SCSI port
 168  *          force_irq - set it even if it conflicts with sound driver
 169  *
 170  */
 171
 172 static void __init
 173         init_board( unsigned short io_port, int irq, int force_irq )
 174 {
 175         unsigned int    tmp;
 176         unsigned int    pas_irq_code;
 177
 178         /* Initialize the SCSI part of the board */
 179
 180         outb( 0x30, io_port + P_TIMEOUT_COUNTER_REG );  /* Timeout counter */
 181         outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET );   /* Reset TC */
 182         outb( 0x01, io_port + WAIT_STATE );   /* 1 Wait state */
 183
 184         inb(io_port + pas16_offset[RESET_PARITY_INTERRUPT_REG]);
 185
 186         /* Set the SCSI interrupt pointer without mucking up the sound
 187          * interrupt pointer in the same byte.
 188          */
 189         pas_irq_code = ( irq < 16 ) ? scsi_irq_translate[irq] : 0;
 190         tmp = inb( io_port + IO_CONFIG_3 );
 191
 192         if( (( tmp & 0x0f ) == pas_irq_code) && pas_irq_code > 0
 193             && !force_irq )
 194         {
 195             printk( "pas16: WARNING: Can't use same irq as sound "
 196                     "driver -- interrupts disabled\n" );
 197             /* Set up the drive parameters, disable 5380 interrupts */
 198             outb( 0x4d, io_port + SYS_CONFIG_4 );
 199         }
 200         else
 201         {
 202             tmp = (  tmp & 0x0f ) | ( pas_irq_code << 4 );
 203             outb( tmp, io_port + IO_CONFIG_3 );
 204
 205             /* Set up the drive parameters and enable 5380 interrupts */
 206             outb( 0x6d, io_port + SYS_CONFIG_4 );
 207         }
 208 }
 209
 210
 211 /*
 212  * Function : pas16_hw_detect( unsigned short board_num )
 213  *
 214  * Purpose : determine if a pas16 board is present
 215  *
 216  * Inputs : board_num - logical board number ( 0 - 3 )
 217  *
 218  * Returns : 0 if board not found, 1 if found.
 219  */
 220
 221 static int __init
 222      pas16_hw_detect( unsigned short  board_num )
 223 {
 224     unsigned char       board_rev, tmp;
 225     unsigned short      io_port = bases[ board_num ].io_port;
 226
 227     /* See if we can find a PAS16 board at the address associated
 228      * with this logical board number.
 229      */
 230
 231     /* First, attempt to take a newer model board out of reset and
 232      * give it a base address.  This shouldn't affect older boards.
 233      */
 234     enable_board( board_num, io_port );
 235
 236     /* Now see if it looks like a PAS16 board */
 237     board_rev = inb( io_port + PCB_CONFIG );
 238
 239     if( board_rev == 0xff )
 240         return 0;
 241
 242     tmp = board_rev ^ 0xe0;
 243
 244     outb( tmp, io_port + PCB_CONFIG );
 245     tmp = inb( io_port + PCB_CONFIG );
 246     outb( board_rev, io_port + PCB_CONFIG );
 247
 248     if( board_rev != tmp )      /* Not a PAS-16 */
 249         return 0;
 250
 251     if( ( inb( io_port + OPERATION_MODE_1 ) & 0x03 ) != 0x03 )
 252         return 0;       /* return if no SCSI interface found */
 253
 254     /* Mediavision has some new model boards that return ID bits
 255      * that indicate a SCSI interface, but they're not (LMS).  We'll
 256      * put in an additional test to try to weed them out.
 257      */
 258
 259         outb(0x01, io_port + WAIT_STATE);             /* 1 Wait state */
 260         outb(0x20, io_port + pas16_offset[MODE_REG]); /* Is it really SCSI? */
 261         if (inb(io_port + pas16_offset[MODE_REG]) != 0x20) /* Write to a reg. */
 262                 return 0;                                  /* and try to read */
 263         outb(0x00, io_port + pas16_offset[MODE_REG]);      /* it back. */
 264         if (inb(io_port + pas16_offset[MODE_REG]) != 0x00)
 265                 return 0;
 266
 267     return 1;
 268 }
 269
 270
 271 #ifndef MODULE
 272 /*
 273  * Function : pas16_setup(char *str, int *ints)
 274  *
 275  * Purpose : LILO command line initialization of the overrides array,
 276  *
 277  * Inputs : str - unused, ints - array of integer parameters with ints[0]
 278  *      equal to the number of ints.
 279  *
 280  */
 281
 282 static int __init pas16_setup(char *str)
 283 {
 284         static int commandline_current;
 285     int i;
 286     int ints[10];
 287
 288     get_options(str, ARRAY_SIZE(ints), ints);
 289     if (ints[0] != 2)
 290         printk("pas16_setup : usage pas16=io_port,irq\n");
 291     else
 292         if (commandline_current < NO_OVERRIDES) {
 293             overrides[commandline_current].io_port = (unsigned short) ints[1];
 294             overrides[commandline_current].irq = ints[2];
 295             for (i = 0; i < NO_BASES; ++i)
 296                 if (bases[i].io_port == (unsigned short) ints[1]) {
 297                     bases[i].noauto = 1;
 298                     break;
 299                 }
 300             ++commandline_current;
 301         }
 302     return 1;
 303 }
 304
 305 __setup("pas16=", pas16_setup);
 306 #endif
 307
 308 /*
 309  * Function : int pas16_detect(struct scsi_host_template * tpnt)
 310  *
 311  * Purpose : detects and initializes PAS16 controllers
 312  *      that were autoprobed, overridden on the LILO command line,
 313  *      or specified at compile time.
 314  *
 315  * Inputs : tpnt - template for this SCSI adapter.
 316  *
 317  * Returns : 1 if a host adapter was found, 0 if not.
 318  *
 319  */
 320
 321 static int __init pas16_detect(struct scsi_host_template *tpnt)
 322 {
 323         static int current_override;
 324         static unsigned short current_base;
 325     struct Scsi_Host *instance;
 326     unsigned short io_port;
 327     int  count;
 328
 329     if (pas16_addr != 0) {
 330         overrides[0].io_port = pas16_addr;
 331         /*
 332         *  This is how we avoid seeing more than
 333         *  one host adapter at the same I/O port.
 334         *  Cribbed shamelessly from pas16_setup().
 335         */
 336         for (count = 0; count < NO_BASES; ++count)
 337             if (bases[count].io_port == pas16_addr) {
 338                     bases[count].noauto = 1;
 339                     break;
 340         }
 341     }
 342     if (pas16_irq != 0)
 343         overrides[0].irq = pas16_irq;
 344
 345     for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
 346         io_port = 0;
 347
 348         if (overrides[current_override].io_port)
 349         {
 350             io_port = overrides[current_override].io_port;
 351             enable_board( current_override, io_port );
 352             init_board( io_port, overrides[current_override].irq, 1 );
 353         }
 354         else
 355             for (; !io_port && (current_base < NO_BASES); ++current_base) {
 356                 dprintk(NDEBUG_INIT, "pas16: probing io_port 0x%04x\n",
 357                         (unsigned int)bases[current_base].io_port);
 358                 if ( !bases[current_base].noauto &&
 359                      pas16_hw_detect( current_base ) ){
 360                         io_port = bases[current_base].io_port;
 361                         init_board( io_port, default_irqs[ current_base ], 0 );
 362                         dprintk(NDEBUG_INIT, "pas16: detected board\n");
 363                 }
 364     }
 365
 366         dprintk(NDEBUG_INIT, "pas16: io_port = 0x%04x\n",
 367                 (unsigned int)io_port);
 368
 369         if (!io_port)
 370             break;
 371
 372         instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
 373         if(instance == NULL)
 374                 goto out;
 375
 376         instance->io_port = io_port;
 377
 378         if (NCR5380_init(instance, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP))
 379                 goto out_unregister;
 380
 381         NCR5380_maybe_reset_bus(instance);
 382
 383         if (overrides[current_override].irq != IRQ_AUTO)
 384             instance->irq = overrides[current_override].irq;
 385         else
 386             instance->irq = NCR5380_probe_irq(instance, PAS16_IRQS);
 387
 388         /* Compatibility with documented NCR5380 kernel parameters */
 389         if (instance->irq == 255)
 390                 instance->irq = NO_IRQ;
 391
 392         if (instance->irq != NO_IRQ)
 393             if (request_irq(instance->irq, pas16_intr, 0,
 394                             "pas16", instance)) {
 395                 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
 396                     instance->host_no, instance->irq);
 397                 instance->irq = NO_IRQ;
 398             }
 399
 400         if (instance->irq == NO_IRQ) {
 401             printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
 402             printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
 403             /* Disable 5380 interrupts, leave drive params the same */
 404             outb( 0x4d, io_port + SYS_CONFIG_4 );
 405             outb( (inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3 );
 406         }
 407
 408         dprintk(NDEBUG_INIT, "scsi%d : irq = %d\n",
 409                 instance->host_no, instance->irq);
 410
 411         ++current_override;
 412         ++count;
 413     }
 414     return count;
 415
 416 out_unregister:
 417         scsi_unregister(instance);
 418 out:
 419         return count;
 420 }
 421
 422 /*
 423  * Function : int pas16_biosparam(Disk *disk, struct block_device *dev, int *ip)
 424  *
 425  * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
 426  *      the specified device / size.
 427  *
 428  * Inputs : size = size of device in sectors (512 bytes), dev = block device
 429  *      major / minor, ip[] = {heads, sectors, cylinders}
 430  *
 431  * Returns : always 0 (success), initializes ip
 432  *
 433  */
 434
 435 /*
 436  * XXX Most SCSI boards use this mapping, I could be incorrect.  Some one
 437  * using hard disks on a trantor should verify that this mapping corresponds
 438  * to that used by the BIOS / ASPI driver by running the linux fdisk program
 439  * and matching the H_C_S coordinates to what DOS uses.
 440  */
 441
 442 static int pas16_biosparam(struct scsi_device *sdev, struct block_device *dev,
 443                            sector_t capacity, int *ip)
 444 {
 445   int size = capacity;
 446   ip[0] = 64;
 447   ip[1] = 32;
 448   ip[2] = size >> 11;           /* I think I have it as /(32*64) */
 449   if( ip[2] > 1024 ) {          /* yes, >, not >= */
 450         ip[0]=255;
 451         ip[1]=63;
 452         ip[2]=size/(63*255);
 453         if( ip[2] > 1023 )      /* yes >1023... */
 454                 ip[2] = 1023;
 455   }
 456
 457   return 0;
 458 }
 459
 460 /*
 461  * Function : int pas16_pread (struct Scsi_Host *instance,
 462  *      unsigned char *dst, int len)
 463  *
 464  * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
 465  *      dst
 466  *
 467  * Inputs : dst = destination, len = length in bytes
 468  *
 469  * Returns : 0 on success, non zero on a failure such as a watchdog
 470  *      timeout.
 471  */
 472
 473 static inline int pas16_pread(struct Scsi_Host *instance,
 474                               unsigned char *dst, int len)
 475 {
 476     register unsigned char  *d = dst;
 477     register unsigned short reg = (unsigned short) (instance->io_port +
 478         P_DATA_REG_OFFSET);
 479     register int i = len;
 480     int ii = 0;
 481
 482     while ( !(inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY) )
 483          ++ii;
 484
 485     insb( reg, d, i );
 486
 487     if ( inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
 488         outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
 489         printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
 490             instance->host_no);
 491         return -1;
 492     }
 493     return 0;
 494 }
 495
 496 /*
 497  * Function : int pas16_pwrite (struct Scsi_Host *instance,
 498  *      unsigned char *src, int len)
 499  *
 500  * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
 501  *      src
 502  *
 503  * Inputs : src = source, len = length in bytes
 504  *
 505  * Returns : 0 on success, non zero on a failure such as a watchdog
 506  *      timeout.
 507  */
 508
 509 static inline int pas16_pwrite(struct Scsi_Host *instance,
 510                                unsigned char *src, int len)
 511 {
 512     register unsigned char *s = src;
 513     register unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
 514     register int i = len;
 515     int ii = 0;
 516
 517     while ( !((inb(instance->io_port + P_STATUS_REG_OFFSET)) & P_ST_RDY) )
 518          ++ii;
 519
 520     outsb( reg, s, i );
 521
 522     if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
 523         outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
 524         printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
 525             instance->host_no);
 526         return -1;
 527     }
 528     return 0;
 529 }
 530
 531 #include "NCR5380.c"
 532
 533 static int pas16_release(struct Scsi_Host *shost)
 534 {
 535         if (shost->irq != NO_IRQ)
 536                 free_irq(shost->irq, shost);
 537         NCR5380_exit(shost);
 538         scsi_unregister(shost);
 539         return 0;
 540 }
 541
 542 static struct scsi_host_template driver_template = {
 543         .name                   = "Pro Audio Spectrum-16 SCSI",
 544         .detect                 = pas16_detect,
 545         .release                = pas16_release,
 546         .proc_name              = "pas16",
 547         .info                   = pas16_info,
 548         .queuecommand           = pas16_queue_command,
 549         .eh_abort_handler       = pas16_abort,
 550         .eh_bus_reset_handler   = pas16_bus_reset,
 551         .bios_param             = pas16_biosparam,
 552         .can_queue              = 32,
 553         .this_id                = 7,
 554         .sg_tablesize           = SG_ALL,
 555         .cmd_per_lun            = 2,
 556         .use_clustering         = DISABLE_CLUSTERING,
 557         .cmd_size               = NCR5380_CMD_SIZE,
 558         .max_sectors            = 128,
 559 };
 560 #include "scsi_module.c"
 561
 562 #ifdef MODULE
 563 module_param(pas16_addr, ushort, 0);
 564 module_param(pas16_irq, int, 0);
 565 #endif
 566 MODULE_LICENSE("GPL");