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
  23 /*
  24  * TODO : flesh out DMA support, find some one actually using this (I have
  25  *      a memory mapped Trantor board that works fine)
  26  */
  27
  28 /*
  29  * The card is detected and initialized in one of several ways :
  30  * 1.  With command line overrides - NCR5380=port,irq may be
  31  *     used on the LILO command line to override the defaults.
  32  *
  33  * 2.  With the GENERIC_NCR5380_OVERRIDE compile time define.  This is
  34  *     specified as an array of address, irq, dma, board tuples.  Ie, for
  35  *     one board at 0x350, IRQ5, no dma, I could say
  36  *     -DGENERIC_NCR5380_OVERRIDE={{0xcc000, 5, DMA_NONE, BOARD_NCR5380}}
  37  *
  38  * -1 should be specified for no or DMA interrupt, -2 to autoprobe for an
  39  *      IRQ line if overridden on the command line.
  40  *
  41  * 3.  When included as a module, with arguments passed on the command line:
  42  *         ncr_irq=xx   the interrupt
  43  *         ncr_addr=xx  the port or base address (for port or memory
  44  *                      mapped, resp.)
  45  *         ncr_dma=xx   the DMA
  46  *         ncr_5380=1   to set up for a NCR5380 board
  47  *         ncr_53c400=1 to set up for a NCR53C400 board
  48  *     e.g.
  49  *     modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
  50  *       for a port mapped NCR5380 board or
  51  *     modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
  52  *       for a memory mapped NCR53C400 board with interrupts disabled.
  53  *
  54  * 255 should be specified for no or DMA interrupt, 254 to autoprobe for an
  55  *      IRQ line if overridden on the command line.
  56  *
  57  */
  58
  59 /* settings for DTC3181E card with only Mustek scanner attached */
  60 #define USLEEP_POLL     msecs_to_jiffies(10)
  61 #define USLEEP_SLEEP    msecs_to_jiffies(200)
  62
  63 #define AUTOPROBE_IRQ
  64
  65 #ifdef CONFIG_SCSI_GENERIC_NCR53C400
  66 #define PSEUDO_DMA
  67 #endif
  68
  69 #include <asm/io.h>
  70 #include <linux/signal.h>
  71 #include <linux/blkdev.h>
  72 #include <scsi/scsi_host.h>
  73 #include "g_NCR5380.h"
  74 #include "NCR5380.h"
  75 #include <linux/stat.h>
  76 #include <linux/init.h>
  77 #include <linux/ioport.h>
  78 #include <linux/isapnp.h>
  79 #include <linux/delay.h>
  80 #include <linux/interrupt.h>
  81
  82 static int ncr_irq;
  83 static int ncr_dma;
  84 static int ncr_addr;
  85 static int ncr_5380;
  86 static int ncr_53c400;
  87 static int ncr_53c400a;
  88 static int dtc_3181e;
  89
  90 static struct override {
  91         NCR5380_map_type NCR5380_map_name;
  92         int irq;
  93         int dma;
  94         int board;              /* Use NCR53c400, Ricoh, etc. extensions ? */
  95 } overrides
  96 #ifdef GENERIC_NCR5380_OVERRIDE
  97 [] __initdata = GENERIC_NCR5380_OVERRIDE;
  98 #else
  99 [1] __initdata = { { 0,},};
 100 #endif
 101
 102 #define NO_OVERRIDES ARRAY_SIZE(overrides)
 103
 104 #ifndef MODULE
 105
 106 /**
 107  *      internal_setup          -       handle lilo command string override
 108  *      @board: BOARD_* identifier for the board
 109  *      @str: unused
 110  *      @ints: numeric parameters
 111  *
 112  *      Do LILO command line initialization of the overrides array. Display
 113  *      errors when needed
 114  *
 115  *      Locks: none
 116  */
 117
 118 static void __init internal_setup(int board, char *str, int *ints)
 119 {
 120         static int commandline_current;
 121         switch (board) {
 122         case BOARD_NCR5380:
 123                 if (ints[0] != 2 && ints[0] != 3) {
 124                         printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
 125                         return;
 126                 }
 127                 break;
 128         case BOARD_NCR53C400:
 129                 if (ints[0] != 2) {
 130                         printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
 131                         return;
 132                 }
 133                 break;
 134         case BOARD_NCR53C400A:
 135                 if (ints[0] != 2) {
 136                         printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
 137                         return;
 138                 }
 139                 break;
 140         case BOARD_DTC3181E:
 141                 if (ints[0] != 2) {
 142                         printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
 143                         return;
 144                 }
 145                 break;
 146         }
 147
 148         if (commandline_current < NO_OVERRIDES) {
 149                 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
 150                 overrides[commandline_current].irq = ints[2];
 151                 if (ints[0] == 3)
 152                         overrides[commandline_current].dma = ints[3];
 153                 else
 154                         overrides[commandline_current].dma = DMA_NONE;
 155                 overrides[commandline_current].board = board;
 156                 ++commandline_current;
 157         }
 158 }
 159
 160
 161 /**
 162  *      do_NCR53C80_setup               -       set up entry point
 163  *      @str: unused
 164  *
 165  *      Setup function invoked at boot to parse the ncr5380= command
 166  *      line.
 167  */
 168
 169 static int __init do_NCR5380_setup(char *str)
 170 {
 171         int ints[10];
 172
 173         get_options(str, ARRAY_SIZE(ints), ints);
 174         internal_setup(BOARD_NCR5380, str, ints);
 175         return 1;
 176 }
 177
 178 /**
 179  *      do_NCR53C400_setup              -       set up entry point
 180  *      @str: unused
 181  *      @ints: integer parameters from kernel setup code
 182  *
 183  *      Setup function invoked at boot to parse the ncr53c400= command
 184  *      line.
 185  */
 186
 187 static int __init do_NCR53C400_setup(char *str)
 188 {
 189         int ints[10];
 190
 191         get_options(str, ARRAY_SIZE(ints), ints);
 192         internal_setup(BOARD_NCR53C400, str, ints);
 193         return 1;
 194 }
 195
 196 /**
 197  *      do_NCR53C400A_setup     -       set up entry point
 198  *      @str: unused
 199  *      @ints: integer parameters from kernel setup code
 200  *
 201  *      Setup function invoked at boot to parse the ncr53c400a= command
 202  *      line.
 203  */
 204
 205 static int __init do_NCR53C400A_setup(char *str)
 206 {
 207         int ints[10];
 208
 209         get_options(str, ARRAY_SIZE(ints), ints);
 210         internal_setup(BOARD_NCR53C400A, str, ints);
 211         return 1;
 212 }
 213
 214 /**
 215  *      do_DTC3181E_setup       -       set up entry point
 216  *      @str: unused
 217  *      @ints: integer parameters from kernel setup code
 218  *
 219  *      Setup function invoked at boot to parse the dtc3181e= command
 220  *      line.
 221  */
 222
 223 static int __init do_DTC3181E_setup(char *str)
 224 {
 225         int ints[10];
 226
 227         get_options(str, ARRAY_SIZE(ints), ints);
 228         internal_setup(BOARD_DTC3181E, str, ints);
 229         return 1;
 230 }
 231
 232 #endif
 233
 234 /**
 235  *      generic_NCR5380_detect  -       look for NCR5380 controllers
 236  *      @tpnt: the scsi template
 237  *
 238  *      Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
 239  *      and DTC436(ISAPnP) controllers. If overrides have been set we use
 240  *      them.
 241  *
 242  *      The caller supplied NCR5380_init function is invoked from here, before
 243  *      the interrupt line is taken.
 244  *
 245  *      Locks: none
 246  */
 247
 248 static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 249 {
 250         static int current_override;
 251         int count;
 252         unsigned int *ports;
 253 #ifndef SCSI_G_NCR5380_MEM
 254         int i;
 255         unsigned long region_size = 16;
 256 #endif
 257         static unsigned int __initdata ncr_53c400a_ports[] = {
 258                 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
 259         };
 260         static unsigned int __initdata dtc_3181e_ports[] = {
 261                 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
 262         };
 263         int flags;
 264         struct Scsi_Host *instance;
 265 #ifdef SCSI_G_NCR5380_MEM
 266         unsigned long base;
 267         void __iomem *iomem;
 268 #endif
 269
 270         if (ncr_irq)
 271                 overrides[0].irq = ncr_irq;
 272         if (ncr_dma)
 273                 overrides[0].dma = ncr_dma;
 274         if (ncr_addr)
 275                 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
 276         if (ncr_5380)
 277                 overrides[0].board = BOARD_NCR5380;
 278         else if (ncr_53c400)
 279                 overrides[0].board = BOARD_NCR53C400;
 280         else if (ncr_53c400a)
 281                 overrides[0].board = BOARD_NCR53C400A;
 282         else if (dtc_3181e)
 283                 overrides[0].board = BOARD_DTC3181E;
 284 #ifndef SCSI_G_NCR5380_MEM
 285         if (!current_override && isapnp_present()) {
 286                 struct pnp_dev *dev = NULL;
 287                 count = 0;
 288                 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
 289                         if (count >= NO_OVERRIDES)
 290                                 break;
 291                         if (pnp_device_attach(dev) < 0)
 292                                 continue;
 293                         if (pnp_activate_dev(dev) < 0) {
 294                                 printk(KERN_ERR "dtc436e probe: activate failed\n");
 295                                 pnp_device_detach(dev);
 296                                 continue;
 297                         }
 298                         if (!pnp_port_valid(dev, 0)) {
 299                                 printk(KERN_ERR "dtc436e probe: no valid port\n");
 300                                 pnp_device_detach(dev);
 301                                 continue;
 302                         }
 303                         if (pnp_irq_valid(dev, 0))
 304                                 overrides[count].irq = pnp_irq(dev, 0);
 305                         else
 306                                 overrides[count].irq = NO_IRQ;
 307                         if (pnp_dma_valid(dev, 0))
 308                                 overrides[count].dma = pnp_dma(dev, 0);
 309                         else
 310                                 overrides[count].dma = DMA_NONE;
 311                         overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
 312                         overrides[count].board = BOARD_DTC3181E;
 313                         count++;
 314                 }
 315         }
 316 #endif
 317         tpnt->proc_name = "g_NCR5380";
 318
 319         for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
 320                 if (!(overrides[current_override].NCR5380_map_name))
 321                         continue;
 322
 323                 ports = NULL;
 324                 flags = 0;
 325                 switch (overrides[current_override].board) {
 326                 case BOARD_NCR5380:
 327                         flags = FLAG_NO_PSEUDO_DMA;
 328                         break;
 329                 case BOARD_NCR53C400:
 330 #ifdef PSEUDO_DMA
 331                         flags = FLAG_NCR53C400;
 332 #endif
 333                         break;
 334                 case BOARD_NCR53C400A:
 335                         flags = FLAG_NO_PSEUDO_DMA;
 336                         ports = ncr_53c400a_ports;
 337                         break;
 338                 case BOARD_DTC3181E:
 339                         flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
 340                         ports = dtc_3181e_ports;
 341                         break;
 342                 }
 343
 344 #ifndef SCSI_G_NCR5380_MEM
 345                 if (ports) {
 346                         /* wakeup sequence for the NCR53C400A and DTC3181E */
 347
 348                         /* Disable the adapter and look for a free io port */
 349                         outb(0x59, 0x779);
 350                         outb(0xb9, 0x379);
 351                         outb(0xc5, 0x379);
 352                         outb(0xae, 0x379);
 353                         outb(0xa6, 0x379);
 354                         outb(0x00, 0x379);
 355
 356                         if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
 357                                 for (i = 0; ports[i]; i++) {
 358                                         if (!request_region(ports[i],  16, "ncr53c80"))
 359                                                 continue;
 360                                         if (overrides[current_override].NCR5380_map_name == ports[i])
 361                                                 break;
 362                                         release_region(ports[i], 16);
 363                         } else
 364                                 for (i = 0; ports[i]; i++) {
 365                                         if (!request_region(ports[i],  16, "ncr53c80"))
 366                                                 continue;
 367                                         if (inb(ports[i]) == 0xff)
 368                                                 break;
 369                                         release_region(ports[i], 16);
 370                                 }
 371                         if (ports[i]) {
 372                                 /* At this point we have our region reserved */
 373                                 outb(0x59, 0x779);
 374                                 outb(0xb9, 0x379);
 375                                 outb(0xc5, 0x379);
 376                                 outb(0xae, 0x379);
 377                                 outb(0xa6, 0x379);
 378                                 outb(0x80 | i, 0x379);  /* set io port to be used */
 379                                 outb(0xc0, ports[i] + 9);
 380                                 if (inb(ports[i] + 9) != 0x80)
 381                                         continue;
 382                                 else
 383                                         overrides[current_override].NCR5380_map_name = ports[i];
 384                         } else
 385                                 continue;
 386                 }
 387                 else
 388                 {
 389                         /* Not a 53C400A style setup - just grab */
 390                         if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
 391                                 continue;
 392                         region_size = NCR5380_region_size;
 393                 }
 394 #else
 395                 base = overrides[current_override].NCR5380_map_name;
 396                 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
 397                         continue;
 398                 iomem = ioremap(base, NCR5380_region_size);
 399                 if (!iomem) {
 400                         release_mem_region(base, NCR5380_region_size);
 401                         continue;
 402                 }
 403 #endif
 404                 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
 405                 if (instance == NULL) {
 406 #ifndef SCSI_G_NCR5380_MEM
 407                         release_region(overrides[current_override].NCR5380_map_name, region_size);
 408 #else
 409                         iounmap(iomem);
 410                         release_mem_region(base, NCR5380_region_size);
 411 #endif
 412                         continue;
 413                 }
 414
 415 #ifndef SCSI_G_NCR5380_MEM
 416                 instance->io_port = overrides[current_override].NCR5380_map_name;
 417                 instance->n_io_port = region_size;
 418
 419                 /*
 420                  * On NCR53C400 boards, NCR5380 registers are mapped 8 past
 421                  * the base address.
 422                  */
 423                 if (overrides[current_override].board == BOARD_NCR53C400)
 424                         instance->io_port += 8;
 425 #else
 426                 instance->base = overrides[current_override].NCR5380_map_name;
 427                 ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
 428 #endif
 429
 430                 NCR5380_init(instance, flags);
 431
 432                 if (overrides[current_override].board == BOARD_NCR53C400)
 433                         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
 434
 435                 NCR5380_maybe_reset_bus(instance);
 436
 437                 if (overrides[current_override].irq != IRQ_AUTO)
 438                         instance->irq = overrides[current_override].irq;
 439                 else
 440                         instance->irq = NCR5380_probe_irq(instance, 0xffff);
 441
 442                 /* Compatibility with documented NCR5380 kernel parameters */
 443                 if (instance->irq == 255)
 444                         instance->irq = NO_IRQ;
 445
 446                 if (instance->irq != NO_IRQ)
 447                         if (request_irq(instance->irq, generic_NCR5380_intr,
 448                                         0, "NCR5380", instance)) {
 449                                 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
 450                                 instance->irq = NO_IRQ;
 451                         }
 452
 453                 if (instance->irq == NO_IRQ) {
 454                         printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
 455                         printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
 456                 }
 457
 458                 ++current_override;
 459                 ++count;
 460         }
 461         return count;
 462 }
 463
 464 /**
 465  *      generic_NCR5380_release_resources       -       free resources
 466  *      @instance: host adapter to clean up
 467  *
 468  *      Free the generic interface resources from this adapter.
 469  *
 470  *      Locks: none
 471  */
 472
 473 static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
 474 {
 475         if (instance->irq != NO_IRQ)
 476                 free_irq(instance->irq, instance);
 477         NCR5380_exit(instance);
 478
 479 #ifndef SCSI_G_NCR5380_MEM
 480         release_region(instance->io_port, instance->n_io_port);
 481 #else
 482         iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
 483         release_mem_region(instance->base, NCR5380_region_size);
 484 #endif
 485
 486
 487         return 0;
 488 }
 489
 490 #ifdef BIOSPARAM
 491 /**
 492  *      generic_NCR5380_biosparam
 493  *      @disk: disk to compute geometry for
 494  *      @dev: device identifier for this disk
 495  *      @ip: sizes to fill in
 496  *
 497  *      Generates a BIOS / DOS compatible H-C-S mapping for the specified
 498  *      device / size.
 499  *
 500  *      XXX Most SCSI boards use this mapping, I could be incorrect.  Someone
 501  *      using hard disks on a trantor should verify that this mapping
 502  *      corresponds to that used by the BIOS / ASPI driver by running the linux
 503  *      fdisk program and matching the H_C_S coordinates to what DOS uses.
 504  *
 505  *      Locks: none
 506  */
 507
 508 static int
 509 generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 510                           sector_t capacity, int *ip)
 511 {
 512         ip[0] = 64;
 513         ip[1] = 32;
 514         ip[2] = capacity >> 11;
 515         return 0;
 516 }
 517 #endif
 518
 519 #ifdef PSEUDO_DMA
 520
 521 /**
 522  *      NCR5380_pread           -       pseudo DMA read
 523  *      @instance: adapter to read from
 524  *      @dst: buffer to read into
 525  *      @len: buffer length
 526  *
 527  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 528  *      controller
 529  */
 530
 531 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
 532 {
 533 #ifdef SCSI_G_NCR5380_MEM
 534         struct NCR5380_hostdata *hostdata = shost_priv(instance);
 535 #endif
 536         int blocks = len / 128;
 537         int start = 0;
 538         int bl;
 539
 540         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
 541         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 542         while (1) {
 543                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 544                         break;
 545                 }
 546                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 547                         printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 548                         return -1;
 549                 }
 550                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
 551
 552 #ifndef SCSI_G_NCR5380_MEM
 553                 {
 554                         int i;
 555                         for (i = 0; i < 128; i++)
 556                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 557                 }
 558 #else
 559                 /* implies SCSI_G_NCR5380_MEM */
 560                 memcpy_fromio(dst + start,
 561                               hostdata->iomem + NCR53C400_host_buffer, 128);
 562 #endif
 563                 start += 128;
 564                 blocks--;
 565         }
 566
 567         if (blocks) {
 568                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 569                 {
 570                         // FIXME - no timeout
 571                 }
 572
 573 #ifndef SCSI_G_NCR5380_MEM
 574                 {
 575                         int i;
 576                         for (i = 0; i < 128; i++)
 577                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 578                 }
 579 #else
 580                 /* implies SCSI_G_NCR5380_MEM */
 581                 memcpy_fromio(dst + start,
 582                               hostdata->iomem + NCR53C400_host_buffer, 128);
 583 #endif
 584                 start += 128;
 585                 blocks--;
 586         }
 587
 588         if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 589                 printk("53C400r: no 53C80 gated irq after transfer");
 590
 591 #if 0
 592         /*
 593          *      DON'T DO THIS - THEY NEVER ARRIVE!
 594          */
 595         printk("53C400r: Waiting for 53C80 registers\n");
 596         while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
 597                 ;
 598 #endif
 599         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
 600                 printk(KERN_ERR "53C400r: no end dma signal\n");
 601
 602         NCR5380_write(MODE_REG, MR_BASE);
 603         NCR5380_read(RESET_PARITY_INTERRUPT_REG);
 604         return 0;
 605 }
 606
 607 /**
 608  *      NCR5380_write           -       pseudo DMA write
 609  *      @instance: adapter to read from
 610  *      @dst: buffer to read into
 611  *      @len: buffer length
 612  *
 613  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 614  *      controller
 615  */
 616
 617 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
 618 {
 619 #ifdef SCSI_G_NCR5380_MEM
 620         struct NCR5380_hostdata *hostdata = shost_priv(instance);
 621 #endif
 622         int blocks = len / 128;
 623         int start = 0;
 624         int bl;
 625         int i;
 626
 627         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
 628         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 629         while (1) {
 630                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 631                         printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 632                         return -1;
 633                 }
 634
 635                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 636                         break;
 637                 }
 638                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 639                         ; // FIXME - timeout
 640 #ifndef SCSI_G_NCR5380_MEM
 641                 {
 642                         for (i = 0; i < 128; i++)
 643                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 644                 }
 645 #else
 646                 /* implies SCSI_G_NCR5380_MEM */
 647                 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
 648                             src + start, 128);
 649 #endif
 650                 start += 128;
 651                 blocks--;
 652         }
 653         if (blocks) {
 654                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 655                         ; // FIXME - no timeout
 656
 657 #ifndef SCSI_G_NCR5380_MEM
 658                 {
 659                         for (i = 0; i < 128; i++)
 660                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 661                 }
 662 #else
 663                 /* implies SCSI_G_NCR5380_MEM */
 664                 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
 665                             src + start, 128);
 666 #endif
 667                 start += 128;
 668                 blocks--;
 669         }
 670
 671 #if 0
 672         printk("53C400w: waiting for registers to be available\n");
 673         THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
 674         printk("53C400w: Got em\n");
 675 #endif
 676
 677         /* Let's wait for this instead - could be ugly */
 678         /* All documentation says to check for this. Maybe my hardware is too
 679          * fast. Waiting for it seems to work fine! KLL
 680          */
 681         while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 682                 ;       // FIXME - no timeout
 683
 684         /*
 685          * I know. i is certainly != 0 here but the loop is new. See previous
 686          * comment.
 687          */
 688         if (i) {
 689                 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
 690                         printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
 691         } else
 692                 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
 693
 694 #if 0
 695         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
 696                 printk(KERN_ERR "53C400w: no end dma signal\n");
 697         }
 698 #endif
 699         while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
 700                 ;       // TIMEOUT
 701         return 0;
 702 }
 703 #endif /* PSEUDO_DMA */
 704
 705 /*
 706  *      Include the NCR5380 core code that we build our driver around
 707  */
 708
 709 #include "NCR5380.c"
 710
 711 static struct scsi_host_template driver_template = {
 712         .show_info              = generic_NCR5380_show_info,
 713         .name                   = "Generic NCR5380/NCR53C400 SCSI",
 714         .detect                 = generic_NCR5380_detect,
 715         .release                = generic_NCR5380_release_resources,
 716         .info                   = generic_NCR5380_info,
 717         .queuecommand           = generic_NCR5380_queue_command,
 718         .eh_abort_handler       = generic_NCR5380_abort,
 719         .eh_bus_reset_handler   = generic_NCR5380_bus_reset,
 720         .bios_param             = NCR5380_BIOSPARAM,
 721         .can_queue              = CAN_QUEUE,
 722         .this_id                = 7,
 723         .sg_tablesize           = SG_ALL,
 724         .cmd_per_lun            = CMD_PER_LUN,
 725         .use_clustering         = DISABLE_CLUSTERING,
 726 };
 727 #include <linux/module.h>
 728 #include "scsi_module.c"
 729
 730 module_param(ncr_irq, int, 0);
 731 module_param(ncr_dma, int, 0);
 732 module_param(ncr_addr, int, 0);
 733 module_param(ncr_5380, int, 0);
 734 module_param(ncr_53c400, int, 0);
 735 module_param(ncr_53c400a, int, 0);
 736 module_param(dtc_3181e, int, 0);
 737 MODULE_LICENSE("GPL");
 738
 739 #if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
 740 static struct isapnp_device_id id_table[] = {
 741         {
 742          ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 743          ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
 744          0},
 745         {0}
 746 };
 747
 748 MODULE_DEVICE_TABLE(isapnp, id_table);
 749 #endif
 750
 751 __setup("ncr5380=", do_NCR5380_setup);
 752 __setup("ncr53c400=", do_NCR53C400_setup);
 753 __setup("ncr53c400a=", do_NCR53C400A_setup);
 754 __setup("dtc3181e=", do_DTC3181E_setup);