drivers/scsi/g_NCR5380.c

   1 /*
   2  * Generic Generic NCR5380 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) 440-4894
   9  *
  10  * NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin
  11  *    K.Lentin@cs.monash.edu.au
  12  *
  13  * NCR53C400A extensions (c) 1996, Ingmar Baumgart
  14  *    ingmar@gonzo.schwaben.de
  15  *
  16  * DTC3181E extensions (c) 1997, Ronald van Cuijlenborg
  17  * ronald.van.cuijlenborg@tip.nl or nutty@dds.nl
  18  *
  19  * Added ISAPNP support for DTC436 adapters,
  20  * Thomas Sailer, sailer@ife.ee.ethz.ch
  21  *
  22  * ALPHA RELEASE 1.
  23  *
  24  * For more information, please consult
  25  *
  26  * NCR 5380 Family
  27  * SCSI Protocol Controller
  28  * Databook
  29  *
  30  * NCR Microelectronics
  31  * 1635 Aeroplaza Drive
  32  * Colorado Springs, CO 80916
  33  * 1+ (719) 578-3400
  34  * 1+ (800) 334-5454
  35  */
  36
  37 /*
  38  * TODO : flesh out DMA support, find some one actually using this (I have
  39  *      a memory mapped Trantor board that works fine)
  40  */
  41
  42 /*
  43  * Options :
  44  *
  45  * PARITY - enable parity checking.  Not supported.
  46  *
  47  * SCSI2 - enable support for SCSI-II tagged queueing.  Untested.
  48  *
  49  * USLEEP - enable support for devices that don't disconnect.  Untested.
  50  *
  51  * The card is detected and initialized in one of several ways :
  52  * 1.  With command line overrides - NCR5380=port,irq may be
  53  *     used on the LILO command line to override the defaults.
  54  *
  55  * 2.  With the GENERIC_NCR5380_OVERRIDE compile time define.  This is
  56  *     specified as an array of address, irq, dma, board tuples.  Ie, for
  57  *     one board at 0x350, IRQ5, no dma, I could say
  58  *     -DGENERIC_NCR5380_OVERRIDE={{0xcc000, 5, DMA_NONE, BOARD_NCR5380}}
  59  *
  60  * -1 should be specified for no or DMA interrupt, -2 to autoprobe for an
  61  *      IRQ line if overridden on the command line.
  62  *
  63  * 3.  When included as a module, with arguments passed on the command line:
  64  *         ncr_irq=xx   the interrupt
  65  *         ncr_addr=xx  the port or base address (for port or memory
  66  *                      mapped, resp.)
  67  *         ncr_dma=xx   the DMA
  68  *         ncr_5380=1   to set up for a NCR5380 board
  69  *         ncr_53c400=1 to set up for a NCR53C400 board
  70  *     e.g.
  71  *     modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
  72  *       for a port mapped NCR5380 board or
  73  *     modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
  74  *       for a memory mapped NCR53C400 board with interrupts disabled.
  75  *
  76  * 255 should be specified for no or DMA interrupt, 254 to autoprobe for an
  77  *      IRQ line if overridden on the command line.
  78  *
  79  */
  80
  81 /*
  82  * $Log: generic_NCR5380.c,v $
  83  */
  84
  85 /* settings for DTC3181E card with only Mustek scanner attached */
  86 #define USLEEP
  87 #define USLEEP_POLL     1
  88 #define USLEEP_SLEEP    20
  89 #define USLEEP_WAITLONG 500
  90
  91 #define AUTOPROBE_IRQ
  92 #define AUTOSENSE
  93
  94 #include <linux/config.h>
  95
  96 #ifdef CONFIG_SCSI_GENERIC_NCR53C400
  97 #define NCR53C400_PSEUDO_DMA 1
  98 #define PSEUDO_DMA
  99 #define NCR53C400
 100 #define NCR5380_STATS
 101 #undef NCR5380_STAT_LIMIT
 102 #endif
 103
 104 #include <asm/system.h>
 105 #include <asm/io.h>
 106 #include <linux/signal.h>
 107 #include <linux/sched.h>
 108 #include <linux/blkdev.h>
 109 #include "scsi.h"
 110 #include <scsi/scsi_host.h>
 111 #include "g_NCR5380.h"
 112 #include "NCR5380.h"
 113 #include <linux/stat.h>
 114 #include <linux/init.h>
 115 #include <linux/ioport.h>
 116 #include <linux/isapnp.h>
 117 #include <linux/delay.h>
 118 #include <linux/interrupt.h>
 119
 120 #define NCR_NOT_SET 0
 121 static int ncr_irq = NCR_NOT_SET;
 122 static int ncr_dma = NCR_NOT_SET;
 123 static int ncr_addr = NCR_NOT_SET;
 124 static int ncr_5380 = NCR_NOT_SET;
 125 static int ncr_53c400 = NCR_NOT_SET;
 126 static int ncr_53c400a = NCR_NOT_SET;
 127 static int dtc_3181e = NCR_NOT_SET;
 128
 129 static struct override {
 130         NCR5380_implementation_fields;
 131         int irq;
 132         int dma;
 133         int board;              /* Use NCR53c400, Ricoh, etc. extensions ? */
 134 } overrides
 135 #ifdef GENERIC_NCR5380_OVERRIDE
 136 [] __initdata = GENERIC_NCR5380_OVERRIDE;
 137 #else
 138 [1] __initdata = { { 0,},};
 139 #endif
 140
 141
 142 #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
 143
 144 #ifndef MODULE
 145
 146 /**
 147  *      internal_setup          -       handle lilo command string override
 148  *      @board: BOARD_* identifier for the board
 149  *      @str: unused
 150  *      @ints: numeric parameters
 151  *
 152  *      Do LILO command line initialization of the overrides array. Display
 153  *      errors when needed
 154  *
 155  *      Locks: none
 156  */
 157
 158 static void __init internal_setup(int board, char *str, int *ints)
 159 {
 160         static int commandline_current = 0;
 161         switch (board) {
 162         case BOARD_NCR5380:
 163                 if (ints[0] != 2 && ints[0] != 3) {
 164                         printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
 165                         return;
 166                 }
 167                 break;
 168         case BOARD_NCR53C400:
 169                 if (ints[0] != 2) {
 170                         printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
 171                         return;
 172                 }
 173                 break;
 174         case BOARD_NCR53C400A:
 175                 if (ints[0] != 2) {
 176                         printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
 177                         return;
 178                 }
 179                 break;
 180         case BOARD_DTC3181E:
 181                 if (ints[0] != 2) {
 182                         printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
 183                         return;
 184                 }
 185                 break;
 186         }
 187
 188         if (commandline_current < NO_OVERRIDES) {
 189                 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
 190                 overrides[commandline_current].irq = ints[2];
 191                 if (ints[0] == 3)
 192                         overrides[commandline_current].dma = ints[3];
 193                 else
 194                         overrides[commandline_current].dma = DMA_NONE;
 195                 overrides[commandline_current].board = board;
 196                 ++commandline_current;
 197         }
 198 }
 199
 200
 201 /**
 202  *      do_NCR53C80_setup               -       set up entry point
 203  *      @str: unused
 204  *
 205  *      Setup function invoked at boot to parse the ncr5380= command
 206  *      line.
 207  */
 208
 209 static int __init do_NCR5380_setup(char *str)
 210 {
 211         int ints[10];
 212
 213         get_options(str, sizeof(ints) / sizeof(int), ints);
 214         internal_setup(BOARD_NCR5380, str, ints);
 215         return 1;
 216 }
 217
 218 /**
 219  *      do_NCR53C400_setup              -       set up entry point
 220  *      @str: unused
 221  *      @ints: integer parameters from kernel setup code
 222  *
 223  *      Setup function invoked at boot to parse the ncr53c400= command
 224  *      line.
 225  */
 226
 227 static int __init do_NCR53C400_setup(char *str)
 228 {
 229         int ints[10];
 230
 231         get_options(str, sizeof(ints) / sizeof(int), ints);
 232         internal_setup(BOARD_NCR53C400, str, ints);
 233         return 1;
 234 }
 235
 236 /**
 237  *      do_NCR53C400A_setup     -       set up entry point
 238  *      @str: unused
 239  *      @ints: integer parameters from kernel setup code
 240  *
 241  *      Setup function invoked at boot to parse the ncr53c400a= command
 242  *      line.
 243  */
 244
 245 static int __init do_NCR53C400A_setup(char *str)
 246 {
 247         int ints[10];
 248
 249         get_options(str, sizeof(ints) / sizeof(int), ints);
 250         internal_setup(BOARD_NCR53C400A, str, ints);
 251         return 1;
 252 }
 253
 254 /**
 255  *      do_DTC3181E_setup       -       set up entry point
 256  *      @str: unused
 257  *      @ints: integer parameters from kernel setup code
 258  *
 259  *      Setup function invoked at boot to parse the dtc3181e= command
 260  *      line.
 261  */
 262
 263 static int __init do_DTC3181E_setup(char *str)
 264 {
 265         int ints[10];
 266
 267         get_options(str, sizeof(ints) / sizeof(int), ints);
 268         internal_setup(BOARD_DTC3181E, str, ints);
 269         return 1;
 270 }
 271
 272 #endif
 273
 274 /**
 275  *      generic_NCR5380_detect  -       look for NCR5380 controllers
 276  *      @tpnt: the scsi template
 277  *
 278  *      Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
 279  *      and DTC436(ISAPnP) controllers. If overrides have been set we use
 280  *      them.
 281  *
 282  *      The caller supplied NCR5380_init function is invoked from here, before
 283  *      the interrupt line is taken.
 284  *
 285  *      Locks: none
 286  */
 287
 288 int __init generic_NCR5380_detect(Scsi_Host_Template * tpnt)
 289 {
 290         static int current_override = 0;
 291         int count, i;
 292         unsigned int *ports;
 293         unsigned long region_size = 16;
 294         static unsigned int __initdata ncr_53c400a_ports[] = {
 295                 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
 296         };
 297         static unsigned int __initdata dtc_3181e_ports[] = {
 298                 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
 299         };
 300         int flags = 0;
 301         struct Scsi_Host *instance;
 302
 303         if (ncr_irq != NCR_NOT_SET)
 304                 overrides[0].irq = ncr_irq;
 305         if (ncr_dma != NCR_NOT_SET)
 306                 overrides[0].dma = ncr_dma;
 307         if (ncr_addr != NCR_NOT_SET)
 308                 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
 309         if (ncr_5380 != NCR_NOT_SET)
 310                 overrides[0].board = BOARD_NCR5380;
 311         else if (ncr_53c400 != NCR_NOT_SET)
 312                 overrides[0].board = BOARD_NCR53C400;
 313         else if (ncr_53c400a != NCR_NOT_SET)
 314                 overrides[0].board = BOARD_NCR53C400A;
 315         else if (dtc_3181e != NCR_NOT_SET)
 316                 overrides[0].board = BOARD_DTC3181E;
 317
 318         if (!current_override && isapnp_present()) {
 319                 struct pnp_dev *dev = NULL;
 320                 count = 0;
 321                 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
 322                         if (count >= NO_OVERRIDES)
 323                                 break;
 324                         if (pnp_device_attach(dev) < 0) {
 325                                 printk(KERN_ERR "dtc436e probe: attach failed\n");
 326                                 continue;
 327                         }
 328                         if (pnp_activate_dev(dev) < 0) {
 329                                 printk(KERN_ERR "dtc436e probe: activate failed\n");
 330                                 pnp_device_detach(dev);
 331                                 continue;
 332                         }
 333                         if (!pnp_port_valid(dev, 0)) {
 334                                 printk(KERN_ERR "dtc436e probe: no valid port\n");
 335                                 pnp_device_detach(dev);
 336                                 continue;
 337                         }
 338                         if (pnp_irq_valid(dev, 0))
 339                                 overrides[count].irq = pnp_irq(dev, 0);
 340                         else
 341                                 overrides[count].irq = SCSI_IRQ_NONE;
 342                         if (pnp_dma_valid(dev, 0))
 343                                 overrides[count].dma = pnp_dma(dev, 0);
 344                         else
 345                                 overrides[count].dma = DMA_NONE;
 346                         overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
 347                         overrides[count].board = BOARD_DTC3181E;
 348                         count++;
 349                 }
 350         }
 351
 352         tpnt->proc_name = "g_NCR5380";
 353
 354         for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
 355                 if (!(overrides[current_override].NCR5380_map_name))
 356                         continue;
 357
 358                 ports = NULL;
 359                 switch (overrides[current_override].board) {
 360                 case BOARD_NCR5380:
 361                         flags = FLAG_NO_PSEUDO_DMA;
 362                         break;
 363                 case BOARD_NCR53C400:
 364                         flags = FLAG_NCR53C400;
 365                         break;
 366                 case BOARD_NCR53C400A:
 367                         flags = FLAG_NO_PSEUDO_DMA;
 368                         ports = ncr_53c400a_ports;
 369                         break;
 370                 case BOARD_DTC3181E:
 371                         flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
 372                         ports = dtc_3181e_ports;
 373                         break;
 374                 }
 375
 376 #ifndef CONFIG_SCSI_G_NCR5380_MEM
 377                 if (ports) {
 378                         /* wakeup sequence for the NCR53C400A and DTC3181E */
 379
 380                         /* Disable the adapter and look for a free io port */
 381                         outb(0x59, 0x779);
 382                         outb(0xb9, 0x379);
 383                         outb(0xc5, 0x379);
 384                         outb(0xae, 0x379);
 385                         outb(0xa6, 0x379);
 386                         outb(0x00, 0x379);
 387
 388                         if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
 389                                 for (i = 0; ports[i]; i++) {
 390                                         if (!request_region(ports[i],  16, "ncr53c80"))
 391                                                 continue;
 392                                         if (overrides[current_override].NCR5380_map_name == ports[i])
 393                                                 break;
 394                                         release_region(ports[i], 16);
 395                         } else
 396                                 for (i = 0; ports[i]; i++) {
 397                                         if (!request_region(ports[i],  16, "ncr53c80"))
 398                                                 continue;
 399                                         if (inb(ports[i]) == 0xff)
 400                                                 break;
 401                                         release_region(ports[i], 16);
 402                                 }
 403                         if (ports[i]) {
 404                                 /* At this point we have our region reserved */
 405                                 outb(0x59, 0x779);
 406                                 outb(0xb9, 0x379);
 407                                 outb(0xc5, 0x379);
 408                                 outb(0xae, 0x379);
 409                                 outb(0xa6, 0x379);
 410                                 outb(0x80 | i, 0x379);  /* set io port to be used */
 411                                 outb(0xc0, ports[i] + 9);
 412                                 if (inb(ports[i] + 9) != 0x80)
 413                                         continue;
 414                                 else
 415                                         overrides[current_override].NCR5380_map_name = ports[i];
 416                         } else
 417                                 continue;
 418                 }
 419                 else
 420                 {
 421                         /* Not a 53C400A style setup - just grab */
 422                         if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
 423                                 continue;
 424                         region_size = NCR5380_region_size;
 425                 }
 426 #else
 427                 if(!request_mem_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380"))
 428                         continue;
 429 #endif
 430                 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
 431                 if (instance == NULL) {
 432 #ifndef CONFIG_SCSI_G_NCR5380_MEM
 433                         release_region(overrides[current_override].NCR5380_map_name, region_size);
 434 #else
 435                         release_mem_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size);
 436 #endif
 437                         continue;
 438                 }
 439
 440                 instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name;
 441 #ifndef CONFIG_SCSI_G_NCR5380_MEM
 442                 instance->n_io_port = region_size;
 443 #endif
 444
 445                 NCR5380_init(instance, flags);
 446
 447                 if (overrides[current_override].irq != IRQ_AUTO)
 448                         instance->irq = overrides[current_override].irq;
 449                 else
 450                         instance->irq = NCR5380_probe_irq(instance, 0xffff);
 451
 452                 if (instance->irq != SCSI_IRQ_NONE)
 453                         if (request_irq(instance->irq, generic_NCR5380_intr, SA_INTERRUPT, "NCR5380", instance)) {
 454                                 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
 455                                 instance->irq = SCSI_IRQ_NONE;
 456                         }
 457
 458                 if (instance->irq == SCSI_IRQ_NONE) {
 459                         printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
 460                         printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
 461                 }
 462
 463                 printk(KERN_INFO "scsi%d : at " STRVAL(NCR5380_map_name) " 0x%x", instance->host_no, (unsigned int) instance->NCR5380_instance_name);
 464                 if (instance->irq == SCSI_IRQ_NONE)
 465                         printk(" interrupts disabled");
 466                 else
 467                         printk(" irq %d", instance->irq);
 468                 printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d", CAN_QUEUE, CMD_PER_LUN, GENERIC_NCR5380_PUBLIC_RELEASE);
 469                 NCR5380_print_options(instance);
 470                 printk("\n");
 471
 472                 ++current_override;
 473                 ++count;
 474         }
 475         return count;
 476 }
 477
 478 /**
 479  *      generic_NCR5380_info    -       reporting string
 480  *      @host: NCR5380 to report on
 481  *
 482  *      Report driver information for the NCR5380
 483  */
 484
 485 const char *generic_NCR5380_info(struct Scsi_Host *host)
 486 {
 487         static const char string[] = "Generic NCR5380/53C400 Driver";
 488         return string;
 489 }
 490
 491 /**
 492  *      generic_NCR5380_release_resources       -       free resources
 493  *      @instance: host adapter to clean up
 494  *
 495  *      Free the generic interface resources from this adapter.
 496  *
 497  *      Locks: none
 498  */
 499
 500 int generic_NCR5380_release_resources(struct Scsi_Host *instance)
 501 {
 502         NCR5380_local_declare();
 503         NCR5380_setup(instance);
 504
 505         if (instance->irq != SCSI_IRQ_NONE)
 506                 free_irq(instance->irq, NULL);
 507         NCR5380_exit(instance);
 508
 509 #ifndef CONFIG_SCSI_G_NCR5380_MEM
 510         release_region(instance->NCR5380_instance_name, instance->n_io_port);
 511 #else
 512         release_mem_region(instance->NCR5380_instance_name, NCR5380_region_size);
 513 #endif
 514
 515
 516         return 0;
 517 }
 518
 519 #ifdef BIOSPARAM
 520 /**
 521  *      generic_NCR5380_biosparam
 522  *      @disk: disk to compute geometry for
 523  *      @dev: device identifier for this disk
 524  *      @ip: sizes to fill in
 525  *
 526  *      Generates a BIOS / DOS compatible H-C-S mapping for the specified
 527  *      device / size.
 528  *
 529  *      XXX Most SCSI boards use this mapping, I could be incorrect.  Someone
 530  *      using hard disks on a trantor should verify that this mapping
 531  *      corresponds to that used by the BIOS / ASPI driver by running the linux
 532  *      fdisk program and matching the H_C_S coordinates to what DOS uses.
 533  *
 534  *      Locks: none
 535  */
 536
 537 static int
 538 generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 539                           sector_t capacity, int *ip)
 540 {
 541         ip[0] = 64;
 542         ip[1] = 32;
 543         ip[2] = capacity >> 11;
 544         return 0;
 545 }
 546 #endif
 547
 548 #if NCR53C400_PSEUDO_DMA
 549
 550 /**
 551  *      NCR5380_pread           -       pseudo DMA read
 552  *      @instance: adapter to read from
 553  *      @dst: buffer to read into
 554  *      @len: buffer length
 555  *
 556  *      Perform a psuedo DMA mode read from an NCR53C400 or equivalent
 557  *      controller
 558  */
 559
 560 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
 561 {
 562         int blocks = len / 128;
 563         int start = 0;
 564         int bl;
 565
 566         NCR5380_local_declare();
 567         NCR5380_setup(instance);
 568
 569         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
 570         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 571         while (1) {
 572                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 573                         break;
 574                 }
 575                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 576                         printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 577                         return -1;
 578                 }
 579                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
 580
 581 #ifndef CONFIG_SCSI_G_NCR5380_MEM
 582                 {
 583                         int i;
 584                         for (i = 0; i < 128; i++)
 585                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 586                 }
 587 #else
 588                 /* implies CONFIG_SCSI_G_NCR5380_MEM */
 589                 isa_memcpy_fromio(dst + start, NCR53C400_host_buffer + NCR5380_map_name, 128);
 590 #endif
 591                 start += 128;
 592                 blocks--;
 593         }
 594
 595         if (blocks) {
 596                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 597                 {
 598                         // FIXME - no timeout
 599                 }
 600
 601 #ifndef CONFIG_SCSI_G_NCR5380_MEM
 602                 {
 603                         int i;
 604                         for (i = 0; i < 128; i++)
 605                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 606                 }
 607 #else
 608                 /* implies CONFIG_SCSI_G_NCR5380_MEM */
 609                 isa_memcpy_fromio(dst + start, NCR53C400_host_buffer + NCR5380_map_name, 128);
 610 #endif
 611                 start += 128;
 612                 blocks--;
 613         }
 614
 615         if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 616                 printk("53C400r: no 53C80 gated irq after transfer");
 617
 618 #if 0
 619         /*
 620          *      DON'T DO THIS - THEY NEVER ARRIVE!
 621          */
 622         printk("53C400r: Waiting for 53C80 registers\n");
 623         while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
 624                 ;
 625 #endif
 626         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
 627                 printk(KERN_ERR "53C400r: no end dma signal\n");
 628
 629         NCR5380_write(MODE_REG, MR_BASE);
 630         NCR5380_read(RESET_PARITY_INTERRUPT_REG);
 631         return 0;
 632 }
 633
 634 /**
 635  *      NCR5380_write           -       pseudo DMA write
 636  *      @instance: adapter to read from
 637  *      @dst: buffer to read into
 638  *      @len: buffer length
 639  *
 640  *      Perform a psuedo DMA mode read from an NCR53C400 or equivalent
 641  *      controller
 642  */
 643
 644 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
 645 {
 646         int blocks = len / 128;
 647         int start = 0;
 648         int bl;
 649         int i;
 650
 651         NCR5380_local_declare();
 652         NCR5380_setup(instance);
 653
 654         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
 655         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 656         while (1) {
 657                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 658                         printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 659                         return -1;
 660                 }
 661
 662                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 663                         break;
 664                 }
 665                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 666                         ; // FIXME - timeout
 667 #ifndef CONFIG_SCSI_G_NCR5380_MEM
 668                 {
 669                         for (i = 0; i < 128; i++)
 670                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 671                 }
 672 #else
 673                 /* implies CONFIG_SCSI_G_NCR5380_MEM */
 674                 isa_memcpy_toio(NCR53C400_host_buffer + NCR5380_map_name, src + start, 128);
 675 #endif
 676                 start += 128;
 677                 blocks--;
 678         }
 679         if (blocks) {
 680                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 681                         ; // FIXME - no timeout
 682
 683 #ifndef CONFIG_SCSI_G_NCR5380_MEM
 684                 {
 685                         for (i = 0; i < 128; i++)
 686                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 687                 }
 688 #else
 689                 /* implies CONFIG_SCSI_G_NCR5380_MEM */
 690                 isa_memcpy_toio(NCR53C400_host_buffer + NCR5380_map_name, src + start, 128);
 691 #endif
 692                 start += 128;
 693                 blocks--;
 694         }
 695
 696 #if 0
 697         printk("53C400w: waiting for registers to be available\n");
 698         THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
 699         printk("53C400w: Got em\n");
 700 #endif
 701
 702         /* Let's wait for this instead - could be ugly */
 703         /* All documentation says to check for this. Maybe my hardware is too
 704          * fast. Waiting for it seems to work fine! KLL
 705          */
 706         while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 707                 ;       // FIXME - no timeout
 708
 709         /*
 710          * I know. i is certainly != 0 here but the loop is new. See previous
 711          * comment.
 712          */
 713         if (i) {
 714                 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
 715                         printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
 716         } else
 717                 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
 718
 719 #if 0
 720         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
 721                 printk(KERN_ERR "53C400w: no end dma signal\n");
 722         }
 723 #endif
 724         while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
 725                 ;       // TIMEOUT
 726         return 0;
 727 }
 728 #endif                          /* PSEUDO_DMA */
 729
 730 /*
 731  *      Include the NCR5380 core code that we build our driver around
 732  */
 733
 734 #include "NCR5380.c"
 735
 736 #define PRINTP(x) len += sprintf(buffer+len, x)
 737 #define ANDP ,
 738
 739 static int sprint_opcode(char *buffer, int len, int opcode)
 740 {
 741         int start = len;
 742         PRINTP("0x%02x " ANDP opcode);
 743         return len - start;
 744 }
 745
 746 static int sprint_command(char *buffer, int len, unsigned char *command)
 747 {
 748         int i, s, start = len;
 749         len += sprint_opcode(buffer, len, command[0]);
 750         for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
 751                 PRINTP("%02x " ANDP command[i]);
 752         PRINTP("\n");
 753         return len - start;
 754 }
 755
 756 /**
 757  *      sprintf_Scsi_Cmnd       -       print a scsi command
 758  *      @buffer: buffr to print into
 759  *      @len: buffer length
 760  *      @cmd: SCSI command block
 761  *
 762  *      Print out the target and command data in hex
 763  */
 764
 765 static int sprint_Scsi_Cmnd(char *buffer, int len, Scsi_Cmnd * cmd)
 766 {
 767         int start = len;
 768         PRINTP("host number %d destination target %d, lun %d\n" ANDP cmd->device->host->host_no ANDP cmd->device->id ANDP cmd->device->lun);
 769         PRINTP("        command = ");
 770         len += sprint_command(buffer, len, cmd->cmnd);
 771         return len - start;
 772 }
 773
 774 /**
 775  *      generic_NCR5380_proc_info       -       /proc for NCR5380 driver
 776  *      @buffer: buffer to print into
 777  *      @start: start position
 778  *      @offset: offset into buffer
 779  *      @len: length
 780  *      @hostno: instance to affect
 781  *      @inout: read/write
 782  *
 783  *      Provide the procfs information for the 5380 controller. We fill
 784  *      this with useful debugging information including the commands
 785  *      being executed, disconnected command queue and the statistical
 786  *      data
 787  *
 788  *      Locks: global cli/lock for queue walk
 789  */
 790
 791 static int generic_NCR5380_proc_info(struct Scsi_Host *scsi_ptr, char *buffer, char **start, off_t offset, int length, int inout)
 792 {
 793         int len = 0;
 794         NCR5380_local_declare();
 795         unsigned long flags;
 796         unsigned char status;
 797         int i;
 798         Scsi_Cmnd *ptr;
 799         struct NCR5380_hostdata *hostdata;
 800 #ifdef NCR5380_STATS
 801         Scsi_Device *dev;
 802         extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE];
 803 #endif
 804
 805         NCR5380_setup(scsi_ptr);
 806         hostdata = (struct NCR5380_hostdata *) scsi_ptr->hostdata;
 807
 808         spin_lock_irqsave(scsi_ptr->host_lock, flags);
 809         PRINTP("SCSI host number %d : %s\n" ANDP scsi_ptr->host_no ANDP scsi_ptr->hostt->name);
 810         PRINTP("Generic NCR5380 driver version %d\n" ANDP GENERIC_NCR5380_PUBLIC_RELEASE);
 811         PRINTP("NCR5380 core version %d\n" ANDP NCR5380_PUBLIC_RELEASE);
 812 #ifdef NCR53C400
 813         PRINTP("NCR53C400 extension version %d\n" ANDP NCR53C400_PUBLIC_RELEASE);
 814         PRINTP("NCR53C400 card%s detected\n" ANDP(((struct NCR5380_hostdata *) scsi_ptr->hostdata)->flags & FLAG_NCR53C400) ? "" : " not");
 815 # if NCR53C400_PSEUDO_DMA
 816         PRINTP("NCR53C400 pseudo DMA used\n");
 817 # endif
 818 #else
 819         PRINTP("NO NCR53C400 driver extensions\n");
 820 #endif
 821         PRINTP("Using %s mapping at %s 0x%lx, " ANDP STRVAL(NCR5380_map_config) ANDP STRVAL(NCR5380_map_name) ANDP scsi_ptr->NCR5380_instance_name);
 822         if (scsi_ptr->irq == SCSI_IRQ_NONE)
 823                 PRINTP("no interrupt\n");
 824         else
 825                 PRINTP("on interrupt %d\n" ANDP scsi_ptr->irq);
 826
 827 #ifdef NCR5380_STATS
 828         if (hostdata->connected || hostdata->issue_queue || hostdata->disconnected_queue)
 829                 PRINTP("There are commands pending, transfer rates may be crud\n");
 830         if (hostdata->pendingr)
 831                 PRINTP("  %d pending reads" ANDP hostdata->pendingr);
 832         if (hostdata->pendingw)
 833                 PRINTP("  %d pending writes" ANDP hostdata->pendingw);
 834         if (hostdata->pendingr || hostdata->pendingw)
 835                 PRINTP("\n");
 836         shost_for_each_device(dev, scsi_ptr) {
 837                 unsigned long br = hostdata->bytes_read[dev->id];
 838                 unsigned long bw = hostdata->bytes_write[dev->id];
 839                 long tr = hostdata->time_read[dev->id] / HZ;
 840                 long tw = hostdata->time_write[dev->id] / HZ;
 841
 842                 PRINTP("  T:%d %s " ANDP dev->id ANDP(dev->type < MAX_SCSI_DEVICE_CODE) ? scsi_device_types[(int) dev->type] : "Unknown");
 843                 for (i = 0; i < 8; i++)
 844                         if (dev->vendor[i] >= 0x20)
 845                                 *(buffer + (len++)) = dev->vendor[i];
 846                 *(buffer + (len++)) = ' ';
 847                 for (i = 0; i < 16; i++)
 848                         if (dev->model[i] >= 0x20)
 849                                 *(buffer + (len++)) = dev->model[i];
 850                 *(buffer + (len++)) = ' ';
 851                 for (i = 0; i < 4; i++)
 852                         if (dev->rev[i] >= 0x20)
 853                                 *(buffer + (len++)) = dev->rev[i];
 854                 *(buffer + (len++)) = ' ';
 855
 856                 PRINTP("\n%10ld kb read    in %5ld secs" ANDP br / 1024 ANDP tr);
 857                 if (tr)
 858                         PRINTP(" @ %5ld bps" ANDP br / tr);
 859
 860                 PRINTP("\n%10ld kb written in %5ld secs" ANDP bw / 1024 ANDP tw);
 861                 if (tw)
 862                         PRINTP(" @ %5ld bps" ANDP bw / tw);
 863                 PRINTP("\n");
 864         }
 865 #endif
 866
 867         status = NCR5380_read(STATUS_REG);
 868         if (!(status & SR_REQ))
 869                 PRINTP("REQ not asserted, phase unknown.\n");
 870         else {
 871                 for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i);
 872                 PRINTP("Phase %s\n" ANDP phases[i].name);
 873         }
 874
 875         if (!hostdata->connected) {
 876                 PRINTP("No currently connected command\n");
 877         } else {
 878                 len += sprint_Scsi_Cmnd(buffer, len, (Scsi_Cmnd *) hostdata->connected);
 879         }
 880
 881         PRINTP("issue_queue\n");
 882
 883         for (ptr = (Scsi_Cmnd *) hostdata->issue_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
 884                 len += sprint_Scsi_Cmnd(buffer, len, ptr);
 885
 886         PRINTP("disconnected_queue\n");
 887
 888         for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
 889                 len += sprint_Scsi_Cmnd(buffer, len, ptr);
 890
 891         *start = buffer + offset;
 892         len -= offset;
 893         if (len > length)
 894                 len = length;
 895         spin_unlock_irqrestore(scsi_ptr->host_lock, flags);
 896         return len;
 897 }
 898
 899 #undef PRINTP
 900 #undef ANDP
 901
 902 static Scsi_Host_Template driver_template = {
 903         .proc_info              = generic_NCR5380_proc_info,
 904         .name                   = "Generic NCR5380/NCR53C400 Scsi Driver",
 905         .detect                 = generic_NCR5380_detect,
 906         .release                = generic_NCR5380_release_resources,
 907         .info                   = generic_NCR5380_info,
 908         .queuecommand           = generic_NCR5380_queue_command,
 909         .eh_abort_handler       = generic_NCR5380_abort,
 910         .eh_bus_reset_handler   = generic_NCR5380_bus_reset,
 911         .eh_device_reset_handler = generic_NCR5380_device_reset,
 912         .eh_host_reset_handler  = generic_NCR5380_host_reset,
 913         .bios_param             = NCR5380_BIOSPARAM,
 914         .can_queue              = CAN_QUEUE,
 915         .this_id                = 7,
 916         .sg_tablesize           = SG_ALL,
 917         .cmd_per_lun            = CMD_PER_LUN,
 918         .use_clustering         = DISABLE_CLUSTERING,
 919 };
 920 #include <linux/module.h>
 921 #include "scsi_module.c"
 922
 923 module_param(ncr_irq, int, 0);
 924 module_param(ncr_dma, int, 0);
 925 module_param(ncr_addr, int, 0);
 926 module_param(ncr_5380, int, 0);
 927 module_param(ncr_53c400, int, 0);
 928 module_param(ncr_53c400a, int, 0);
 929 module_param(dtc_3181e, int, 0);
 930 MODULE_LICENSE("GPL");
 931
 932
 933 static struct isapnp_device_id id_table[] __devinitdata = {
 934         {
 935          ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 936          ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
 937          0},
 938         {0}
 939 };
 940
 941 MODULE_DEVICE_TABLE(isapnp, id_table);
 942
 943
 944 __setup("ncr5380=", do_NCR5380_setup);
 945 __setup("ncr53c400=", do_NCR53C400_setup);
 946 __setup("ncr53c400a=", do_NCR53C400A_setup);
 947 __setup("dtc3181e=", do_DTC3181E_setup);