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  *      Locks: none
 243  */
 244
 245 static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 246 {
 247         static int current_override;
 248         int count;
 249         unsigned int *ports;
 250 #ifndef SCSI_G_NCR5380_MEM
 251         int i;
 252         unsigned long region_size = 16;
 253 #endif
 254         static unsigned int __initdata ncr_53c400a_ports[] = {
 255                 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
 256         };
 257         static unsigned int __initdata dtc_3181e_ports[] = {
 258                 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
 259         };
 260         int flags;
 261         struct Scsi_Host *instance;
 262 #ifdef SCSI_G_NCR5380_MEM
 263         unsigned long base;
 264         void __iomem *iomem;
 265 #endif
 266
 267         if (ncr_irq)
 268                 overrides[0].irq = ncr_irq;
 269         if (ncr_dma)
 270                 overrides[0].dma = ncr_dma;
 271         if (ncr_addr)
 272                 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
 273         if (ncr_5380)
 274                 overrides[0].board = BOARD_NCR5380;
 275         else if (ncr_53c400)
 276                 overrides[0].board = BOARD_NCR53C400;
 277         else if (ncr_53c400a)
 278                 overrides[0].board = BOARD_NCR53C400A;
 279         else if (dtc_3181e)
 280                 overrides[0].board = BOARD_DTC3181E;
 281 #ifndef SCSI_G_NCR5380_MEM
 282         if (!current_override && isapnp_present()) {
 283                 struct pnp_dev *dev = NULL;
 284                 count = 0;
 285                 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
 286                         if (count >= NO_OVERRIDES)
 287                                 break;
 288                         if (pnp_device_attach(dev) < 0)
 289                                 continue;
 290                         if (pnp_activate_dev(dev) < 0) {
 291                                 printk(KERN_ERR "dtc436e probe: activate failed\n");
 292                                 pnp_device_detach(dev);
 293                                 continue;
 294                         }
 295                         if (!pnp_port_valid(dev, 0)) {
 296                                 printk(KERN_ERR "dtc436e probe: no valid port\n");
 297                                 pnp_device_detach(dev);
 298                                 continue;
 299                         }
 300                         if (pnp_irq_valid(dev, 0))
 301                                 overrides[count].irq = pnp_irq(dev, 0);
 302                         else
 303                                 overrides[count].irq = NO_IRQ;
 304                         if (pnp_dma_valid(dev, 0))
 305                                 overrides[count].dma = pnp_dma(dev, 0);
 306                         else
 307                                 overrides[count].dma = DMA_NONE;
 308                         overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
 309                         overrides[count].board = BOARD_DTC3181E;
 310                         count++;
 311                 }
 312         }
 313 #endif
 314         tpnt->proc_name = "g_NCR5380";
 315
 316         for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
 317                 if (!(overrides[current_override].NCR5380_map_name))
 318                         continue;
 319
 320                 ports = NULL;
 321                 flags = 0;
 322                 switch (overrides[current_override].board) {
 323                 case BOARD_NCR5380:
 324                         flags = FLAG_NO_PSEUDO_DMA;
 325                         break;
 326                 case BOARD_NCR53C400:
 327 #ifdef PSEUDO_DMA
 328                         flags = FLAG_NCR53C400;
 329 #endif
 330                         break;
 331                 case BOARD_NCR53C400A:
 332                         flags = FLAG_NO_PSEUDO_DMA;
 333                         ports = ncr_53c400a_ports;
 334                         break;
 335                 case BOARD_DTC3181E:
 336                         flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
 337                         ports = dtc_3181e_ports;
 338                         break;
 339                 }
 340
 341 #ifndef SCSI_G_NCR5380_MEM
 342                 if (ports) {
 343                         /* wakeup sequence for the NCR53C400A and DTC3181E */
 344
 345                         /* Disable the adapter and look for a free io port */
 346                         outb(0x59, 0x779);
 347                         outb(0xb9, 0x379);
 348                         outb(0xc5, 0x379);
 349                         outb(0xae, 0x379);
 350                         outb(0xa6, 0x379);
 351                         outb(0x00, 0x379);
 352
 353                         if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
 354                                 for (i = 0; ports[i]; i++) {
 355                                         if (!request_region(ports[i],  16, "ncr53c80"))
 356                                                 continue;
 357                                         if (overrides[current_override].NCR5380_map_name == ports[i])
 358                                                 break;
 359                                         release_region(ports[i], 16);
 360                         } else
 361                                 for (i = 0; ports[i]; i++) {
 362                                         if (!request_region(ports[i],  16, "ncr53c80"))
 363                                                 continue;
 364                                         if (inb(ports[i]) == 0xff)
 365                                                 break;
 366                                         release_region(ports[i], 16);
 367                                 }
 368                         if (ports[i]) {
 369                                 /* At this point we have our region reserved */
 370                                 outb(0x59, 0x779);
 371                                 outb(0xb9, 0x379);
 372                                 outb(0xc5, 0x379);
 373                                 outb(0xae, 0x379);
 374                                 outb(0xa6, 0x379);
 375                                 outb(0x80 | i, 0x379);  /* set io port to be used */
 376                                 outb(0xc0, ports[i] + 9);
 377                                 if (inb(ports[i] + 9) != 0x80)
 378                                         continue;
 379                                 else
 380                                         overrides[current_override].NCR5380_map_name = ports[i];
 381                         } else
 382                                 continue;
 383                 }
 384                 else
 385                 {
 386                         /* Not a 53C400A style setup - just grab */
 387                         if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
 388                                 continue;
 389                         region_size = NCR5380_region_size;
 390                 }
 391 #else
 392                 base = overrides[current_override].NCR5380_map_name;
 393                 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
 394                         continue;
 395                 iomem = ioremap(base, NCR5380_region_size);
 396                 if (!iomem) {
 397                         release_mem_region(base, NCR5380_region_size);
 398                         continue;
 399                 }
 400 #endif
 401                 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
 402                 if (instance == NULL)
 403                         goto out_release;
 404
 405 #ifndef SCSI_G_NCR5380_MEM
 406                 instance->io_port = overrides[current_override].NCR5380_map_name;
 407                 instance->n_io_port = region_size;
 408
 409                 /*
 410                  * On NCR53C400 boards, NCR5380 registers are mapped 8 past
 411                  * the base address.
 412                  */
 413                 if (overrides[current_override].board == BOARD_NCR53C400)
 414                         instance->io_port += 8;
 415 #else
 416                 instance->base = overrides[current_override].NCR5380_map_name;
 417                 ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
 418 #endif
 419
 420                 if (NCR5380_init(instance, flags))
 421                         goto out_unregister;
 422
 423                 if (overrides[current_override].board == BOARD_NCR53C400)
 424                         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
 425
 426                 NCR5380_maybe_reset_bus(instance);
 427
 428                 if (overrides[current_override].irq != IRQ_AUTO)
 429                         instance->irq = overrides[current_override].irq;
 430                 else
 431                         instance->irq = NCR5380_probe_irq(instance, 0xffff);
 432
 433                 /* Compatibility with documented NCR5380 kernel parameters */
 434                 if (instance->irq == 255)
 435                         instance->irq = NO_IRQ;
 436
 437                 if (instance->irq != NO_IRQ)
 438                         if (request_irq(instance->irq, generic_NCR5380_intr,
 439                                         0, "NCR5380", instance)) {
 440                                 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
 441                                 instance->irq = NO_IRQ;
 442                         }
 443
 444                 if (instance->irq == NO_IRQ) {
 445                         printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
 446                         printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
 447                 }
 448
 449                 ++current_override;
 450                 ++count;
 451         }
 452         return count;
 453
 454 out_unregister:
 455         scsi_unregister(instance);
 456 out_release:
 457 #ifndef SCSI_G_NCR5380_MEM
 458         release_region(overrides[current_override].NCR5380_map_name, region_size);
 459 #else
 460         iounmap(iomem);
 461         release_mem_region(base, NCR5380_region_size);
 462 #endif
 463         return count;
 464 }
 465
 466 /**
 467  *      generic_NCR5380_release_resources       -       free resources
 468  *      @instance: host adapter to clean up
 469  *
 470  *      Free the generic interface resources from this adapter.
 471  *
 472  *      Locks: none
 473  */
 474
 475 static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
 476 {
 477         if (instance->irq != NO_IRQ)
 478                 free_irq(instance->irq, instance);
 479         NCR5380_exit(instance);
 480 #ifndef SCSI_G_NCR5380_MEM
 481         release_region(instance->io_port, instance->n_io_port);
 482 #else
 483         iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
 484         release_mem_region(instance->base, NCR5380_region_size);
 485 #endif
 486         return 0;
 487 }
 488
 489 #ifdef BIOSPARAM
 490 /**
 491  *      generic_NCR5380_biosparam
 492  *      @disk: disk to compute geometry for
 493  *      @dev: device identifier for this disk
 494  *      @ip: sizes to fill in
 495  *
 496  *      Generates a BIOS / DOS compatible H-C-S mapping for the specified
 497  *      device / size.
 498  *
 499  *      XXX Most SCSI boards use this mapping, I could be incorrect.  Someone
 500  *      using hard disks on a trantor should verify that this mapping
 501  *      corresponds to that used by the BIOS / ASPI driver by running the linux
 502  *      fdisk program and matching the H_C_S coordinates to what DOS uses.
 503  *
 504  *      Locks: none
 505  */
 506
 507 static int
 508 generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 509                           sector_t capacity, int *ip)
 510 {
 511         ip[0] = 64;
 512         ip[1] = 32;
 513         ip[2] = capacity >> 11;
 514         return 0;
 515 }
 516 #endif
 517
 518 #ifdef PSEUDO_DMA
 519
 520 /**
 521  *      NCR5380_pread           -       pseudo DMA read
 522  *      @instance: adapter to read from
 523  *      @dst: buffer to read into
 524  *      @len: buffer length
 525  *
 526  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 527  *      controller
 528  */
 529
 530 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
 531 {
 532 #ifdef SCSI_G_NCR5380_MEM
 533         struct NCR5380_hostdata *hostdata = shost_priv(instance);
 534 #endif
 535         int blocks = len / 128;
 536         int start = 0;
 537         int bl;
 538
 539         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
 540         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 541         while (1) {
 542                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 543                         break;
 544                 }
 545                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 546                         printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 547                         return -1;
 548                 }
 549                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
 550
 551 #ifndef SCSI_G_NCR5380_MEM
 552                 {
 553                         int i;
 554                         for (i = 0; i < 128; i++)
 555                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 556                 }
 557 #else
 558                 /* implies SCSI_G_NCR5380_MEM */
 559                 memcpy_fromio(dst + start,
 560                               hostdata->iomem + NCR53C400_host_buffer, 128);
 561 #endif
 562                 start += 128;
 563                 blocks--;
 564         }
 565
 566         if (blocks) {
 567                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 568                 {
 569                         // FIXME - no timeout
 570                 }
 571
 572 #ifndef SCSI_G_NCR5380_MEM
 573                 {
 574                         int i;
 575                         for (i = 0; i < 128; i++)
 576                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 577                 }
 578 #else
 579                 /* implies SCSI_G_NCR5380_MEM */
 580                 memcpy_fromio(dst + start,
 581                               hostdata->iomem + NCR53C400_host_buffer, 128);
 582 #endif
 583                 start += 128;
 584                 blocks--;
 585         }
 586
 587         if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 588                 printk("53C400r: no 53C80 gated irq after transfer");
 589
 590 #if 0
 591         /*
 592          *      DON'T DO THIS - THEY NEVER ARRIVE!
 593          */
 594         printk("53C400r: Waiting for 53C80 registers\n");
 595         while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
 596                 ;
 597 #endif
 598         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
 599                 printk(KERN_ERR "53C400r: no end dma signal\n");
 600
 601         NCR5380_write(MODE_REG, MR_BASE);
 602         NCR5380_read(RESET_PARITY_INTERRUPT_REG);
 603         return 0;
 604 }
 605
 606 /**
 607  *      NCR5380_write           -       pseudo DMA write
 608  *      @instance: adapter to read from
 609  *      @dst: buffer to read into
 610  *      @len: buffer length
 611  *
 612  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 613  *      controller
 614  */
 615
 616 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
 617 {
 618 #ifdef SCSI_G_NCR5380_MEM
 619         struct NCR5380_hostdata *hostdata = shost_priv(instance);
 620 #endif
 621         int blocks = len / 128;
 622         int start = 0;
 623         int bl;
 624         int i;
 625
 626         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
 627         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 628         while (1) {
 629                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 630                         printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 631                         return -1;
 632                 }
 633
 634                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 635                         break;
 636                 }
 637                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 638                         ; // FIXME - timeout
 639 #ifndef SCSI_G_NCR5380_MEM
 640                 {
 641                         for (i = 0; i < 128; i++)
 642                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 643                 }
 644 #else
 645                 /* implies SCSI_G_NCR5380_MEM */
 646                 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
 647                             src + start, 128);
 648 #endif
 649                 start += 128;
 650                 blocks--;
 651         }
 652         if (blocks) {
 653                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 654                         ; // FIXME - no timeout
 655
 656 #ifndef SCSI_G_NCR5380_MEM
 657                 {
 658                         for (i = 0; i < 128; i++)
 659                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 660                 }
 661 #else
 662                 /* implies SCSI_G_NCR5380_MEM */
 663                 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
 664                             src + start, 128);
 665 #endif
 666                 start += 128;
 667                 blocks--;
 668         }
 669
 670 #if 0
 671         printk("53C400w: waiting for registers to be available\n");
 672         THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
 673         printk("53C400w: Got em\n");
 674 #endif
 675
 676         /* Let's wait for this instead - could be ugly */
 677         /* All documentation says to check for this. Maybe my hardware is too
 678          * fast. Waiting for it seems to work fine! KLL
 679          */
 680         while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 681                 ;       // FIXME - no timeout
 682
 683         /*
 684          * I know. i is certainly != 0 here but the loop is new. See previous
 685          * comment.
 686          */
 687         if (i) {
 688                 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
 689                         printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
 690         } else
 691                 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
 692
 693 #if 0
 694         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
 695                 printk(KERN_ERR "53C400w: no end dma signal\n");
 696         }
 697 #endif
 698         while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
 699                 ;       // TIMEOUT
 700         return 0;
 701 }
 702 #endif /* PSEUDO_DMA */
 703
 704 /*
 705  *      Include the NCR5380 core code that we build our driver around
 706  */
 707
 708 #include "NCR5380.c"
 709
 710 static struct scsi_host_template driver_template = {
 711         .show_info              = generic_NCR5380_show_info,
 712         .name                   = "Generic NCR5380/NCR53C400 SCSI",
 713         .detect                 = generic_NCR5380_detect,
 714         .release                = generic_NCR5380_release_resources,
 715         .info                   = generic_NCR5380_info,
 716         .queuecommand           = generic_NCR5380_queue_command,
 717         .eh_abort_handler       = generic_NCR5380_abort,
 718         .eh_bus_reset_handler   = generic_NCR5380_bus_reset,
 719         .bios_param             = NCR5380_BIOSPARAM,
 720         .can_queue              = CAN_QUEUE,
 721         .this_id                = 7,
 722         .sg_tablesize           = SG_ALL,
 723         .cmd_per_lun            = CMD_PER_LUN,
 724         .use_clustering         = DISABLE_CLUSTERING,
 725 };
 726 #include <linux/module.h>
 727 #include "scsi_module.c"
 728
 729 module_param(ncr_irq, int, 0);
 730 module_param(ncr_dma, int, 0);
 731 module_param(ncr_addr, int, 0);
 732 module_param(ncr_5380, int, 0);
 733 module_param(ncr_53c400, int, 0);
 734 module_param(ncr_53c400a, int, 0);
 735 module_param(dtc_3181e, int, 0);
 736 MODULE_LICENSE("GPL");
 737
 738 #if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
 739 static struct isapnp_device_id id_table[] = {
 740         {
 741          ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 742          ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
 743          0},
 744         {0}
 745 };
 746
 747 MODULE_DEVICE_TABLE(isapnp, id_table);
 748 #endif
 749
 750 __setup("ncr5380=", do_NCR5380_setup);
 751 __setup("ncr53c400=", do_NCR53C400_setup);
 752 __setup("ncr53c400a=", do_NCR53C400A_setup);
 753 __setup("dtc3181e=", do_DTC3181E_setup);