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 #define AUTOPROBE_IRQ
  60
  61 #ifdef CONFIG_SCSI_GENERIC_NCR53C400
  62 #define PSEUDO_DMA
  63 #endif
  64
  65 #include <asm/io.h>
  66 #include <linux/blkdev.h>
  67 #include <linux/module.h>
  68 #include <scsi/scsi_host.h>
  69 #include "g_NCR5380.h"
  70 #include "NCR5380.h"
  71 #include <linux/init.h>
  72 #include <linux/ioport.h>
  73 #include <linux/isapnp.h>
  74 #include <linux/interrupt.h>
  75
  76 static int ncr_irq;
  77 static int ncr_dma;
  78 static int ncr_addr;
  79 static int ncr_5380;
  80 static int ncr_53c400;
  81 static int ncr_53c400a;
  82 static int dtc_3181e;
  83
  84 static struct override {
  85         NCR5380_map_type NCR5380_map_name;
  86         int irq;
  87         int dma;
  88         int board;              /* Use NCR53c400, Ricoh, etc. extensions ? */
  89 } overrides
  90 #ifdef GENERIC_NCR5380_OVERRIDE
  91 [] __initdata = GENERIC_NCR5380_OVERRIDE;
  92 #else
  93 [1] __initdata = { { 0,},};
  94 #endif
  95
  96 #define NO_OVERRIDES ARRAY_SIZE(overrides)
  97
  98 #ifndef MODULE
  99
 100 /**
 101  *      internal_setup          -       handle lilo command string override
 102  *      @board: BOARD_* identifier for the board
 103  *      @str: unused
 104  *      @ints: numeric parameters
 105  *
 106  *      Do LILO command line initialization of the overrides array. Display
 107  *      errors when needed
 108  *
 109  *      Locks: none
 110  */
 111
 112 static void __init internal_setup(int board, char *str, int *ints)
 113 {
 114         static int commandline_current;
 115         switch (board) {
 116         case BOARD_NCR5380:
 117                 if (ints[0] != 2 && ints[0] != 3) {
 118                         printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
 119                         return;
 120                 }
 121                 break;
 122         case BOARD_NCR53C400:
 123                 if (ints[0] != 2) {
 124                         printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
 125                         return;
 126                 }
 127                 break;
 128         case BOARD_NCR53C400A:
 129                 if (ints[0] != 2) {
 130                         printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
 131                         return;
 132                 }
 133                 break;
 134         case BOARD_DTC3181E:
 135                 if (ints[0] != 2) {
 136                         printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
 137                         return;
 138                 }
 139                 break;
 140         }
 141
 142         if (commandline_current < NO_OVERRIDES) {
 143                 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
 144                 overrides[commandline_current].irq = ints[2];
 145                 if (ints[0] == 3)
 146                         overrides[commandline_current].dma = ints[3];
 147                 else
 148                         overrides[commandline_current].dma = DMA_NONE;
 149                 overrides[commandline_current].board = board;
 150                 ++commandline_current;
 151         }
 152 }
 153
 154
 155 /**
 156  *      do_NCR53C80_setup               -       set up entry point
 157  *      @str: unused
 158  *
 159  *      Setup function invoked at boot to parse the ncr5380= command
 160  *      line.
 161  */
 162
 163 static int __init do_NCR5380_setup(char *str)
 164 {
 165         int ints[10];
 166
 167         get_options(str, ARRAY_SIZE(ints), ints);
 168         internal_setup(BOARD_NCR5380, str, ints);
 169         return 1;
 170 }
 171
 172 /**
 173  *      do_NCR53C400_setup              -       set up entry point
 174  *      @str: unused
 175  *      @ints: integer parameters from kernel setup code
 176  *
 177  *      Setup function invoked at boot to parse the ncr53c400= command
 178  *      line.
 179  */
 180
 181 static int __init do_NCR53C400_setup(char *str)
 182 {
 183         int ints[10];
 184
 185         get_options(str, ARRAY_SIZE(ints), ints);
 186         internal_setup(BOARD_NCR53C400, str, ints);
 187         return 1;
 188 }
 189
 190 /**
 191  *      do_NCR53C400A_setup     -       set up entry point
 192  *      @str: unused
 193  *      @ints: integer parameters from kernel setup code
 194  *
 195  *      Setup function invoked at boot to parse the ncr53c400a= command
 196  *      line.
 197  */
 198
 199 static int __init do_NCR53C400A_setup(char *str)
 200 {
 201         int ints[10];
 202
 203         get_options(str, ARRAY_SIZE(ints), ints);
 204         internal_setup(BOARD_NCR53C400A, str, ints);
 205         return 1;
 206 }
 207
 208 /**
 209  *      do_DTC3181E_setup       -       set up entry point
 210  *      @str: unused
 211  *      @ints: integer parameters from kernel setup code
 212  *
 213  *      Setup function invoked at boot to parse the dtc3181e= command
 214  *      line.
 215  */
 216
 217 static int __init do_DTC3181E_setup(char *str)
 218 {
 219         int ints[10];
 220
 221         get_options(str, ARRAY_SIZE(ints), ints);
 222         internal_setup(BOARD_DTC3181E, str, ints);
 223         return 1;
 224 }
 225
 226 #endif
 227
 228 /**
 229  *      generic_NCR5380_detect  -       look for NCR5380 controllers
 230  *      @tpnt: the scsi template
 231  *
 232  *      Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
 233  *      and DTC436(ISAPnP) controllers. If overrides have been set we use
 234  *      them.
 235  *
 236  *      Locks: none
 237  */
 238
 239 static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 240 {
 241         static int current_override;
 242         int count;
 243         unsigned int *ports;
 244 #ifndef SCSI_G_NCR5380_MEM
 245         int i;
 246         unsigned long region_size = 16;
 247 #endif
 248         static unsigned int __initdata ncr_53c400a_ports[] = {
 249                 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
 250         };
 251         static unsigned int __initdata dtc_3181e_ports[] = {
 252                 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
 253         };
 254         int flags;
 255         struct Scsi_Host *instance;
 256 #ifdef SCSI_G_NCR5380_MEM
 257         unsigned long base;
 258         void __iomem *iomem;
 259 #endif
 260
 261         if (ncr_irq)
 262                 overrides[0].irq = ncr_irq;
 263         if (ncr_dma)
 264                 overrides[0].dma = ncr_dma;
 265         if (ncr_addr)
 266                 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
 267         if (ncr_5380)
 268                 overrides[0].board = BOARD_NCR5380;
 269         else if (ncr_53c400)
 270                 overrides[0].board = BOARD_NCR53C400;
 271         else if (ncr_53c400a)
 272                 overrides[0].board = BOARD_NCR53C400A;
 273         else if (dtc_3181e)
 274                 overrides[0].board = BOARD_DTC3181E;
 275 #ifndef SCSI_G_NCR5380_MEM
 276         if (!current_override && isapnp_present()) {
 277                 struct pnp_dev *dev = NULL;
 278                 count = 0;
 279                 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
 280                         if (count >= NO_OVERRIDES)
 281                                 break;
 282                         if (pnp_device_attach(dev) < 0)
 283                                 continue;
 284                         if (pnp_activate_dev(dev) < 0) {
 285                                 printk(KERN_ERR "dtc436e probe: activate failed\n");
 286                                 pnp_device_detach(dev);
 287                                 continue;
 288                         }
 289                         if (!pnp_port_valid(dev, 0)) {
 290                                 printk(KERN_ERR "dtc436e probe: no valid port\n");
 291                                 pnp_device_detach(dev);
 292                                 continue;
 293                         }
 294                         if (pnp_irq_valid(dev, 0))
 295                                 overrides[count].irq = pnp_irq(dev, 0);
 296                         else
 297                                 overrides[count].irq = NO_IRQ;
 298                         if (pnp_dma_valid(dev, 0))
 299                                 overrides[count].dma = pnp_dma(dev, 0);
 300                         else
 301                                 overrides[count].dma = DMA_NONE;
 302                         overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
 303                         overrides[count].board = BOARD_DTC3181E;
 304                         count++;
 305                 }
 306         }
 307 #endif
 308
 309         for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
 310                 if (!(overrides[current_override].NCR5380_map_name))
 311                         continue;
 312
 313                 ports = NULL;
 314                 flags = 0;
 315                 switch (overrides[current_override].board) {
 316                 case BOARD_NCR5380:
 317                         flags = FLAG_NO_PSEUDO_DMA;
 318                         break;
 319                 case BOARD_NCR53C400:
 320 #ifdef PSEUDO_DMA
 321                         flags = FLAG_NO_DMA_FIXUP;
 322 #endif
 323                         break;
 324                 case BOARD_NCR53C400A:
 325                         flags = FLAG_NO_PSEUDO_DMA;
 326                         ports = ncr_53c400a_ports;
 327                         break;
 328                 case BOARD_DTC3181E:
 329                         flags = FLAG_NO_PSEUDO_DMA;
 330                         ports = dtc_3181e_ports;
 331                         break;
 332                 }
 333
 334 #ifndef SCSI_G_NCR5380_MEM
 335                 if (ports) {
 336                         /* wakeup sequence for the NCR53C400A and DTC3181E */
 337
 338                         /* Disable the adapter and look for a free io port */
 339                         outb(0x59, 0x779);
 340                         outb(0xb9, 0x379);
 341                         outb(0xc5, 0x379);
 342                         outb(0xae, 0x379);
 343                         outb(0xa6, 0x379);
 344                         outb(0x00, 0x379);
 345
 346                         if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
 347                                 for (i = 0; ports[i]; i++) {
 348                                         if (!request_region(ports[i],  16, "ncr53c80"))
 349                                                 continue;
 350                                         if (overrides[current_override].NCR5380_map_name == ports[i])
 351                                                 break;
 352                                         release_region(ports[i], 16);
 353                         } else
 354                                 for (i = 0; ports[i]; i++) {
 355                                         if (!request_region(ports[i],  16, "ncr53c80"))
 356                                                 continue;
 357                                         if (inb(ports[i]) == 0xff)
 358                                                 break;
 359                                         release_region(ports[i], 16);
 360                                 }
 361                         if (ports[i]) {
 362                                 /* At this point we have our region reserved */
 363                                 outb(0x59, 0x779);
 364                                 outb(0xb9, 0x379);
 365                                 outb(0xc5, 0x379);
 366                                 outb(0xae, 0x379);
 367                                 outb(0xa6, 0x379);
 368                                 outb(0x80 | i, 0x379);  /* set io port to be used */
 369                                 outb(0xc0, ports[i] + 9);
 370                                 if (inb(ports[i] + 9) != 0x80)
 371                                         continue;
 372                                 else
 373                                         overrides[current_override].NCR5380_map_name = ports[i];
 374                         } else
 375                                 continue;
 376                 }
 377                 else
 378                 {
 379                         /* Not a 53C400A style setup - just grab */
 380                         if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
 381                                 continue;
 382                         region_size = NCR5380_region_size;
 383                 }
 384 #else
 385                 base = overrides[current_override].NCR5380_map_name;
 386                 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
 387                         continue;
 388                 iomem = ioremap(base, NCR5380_region_size);
 389                 if (!iomem) {
 390                         release_mem_region(base, NCR5380_region_size);
 391                         continue;
 392                 }
 393 #endif
 394                 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
 395                 if (instance == NULL)
 396                         goto out_release;
 397
 398 #ifndef SCSI_G_NCR5380_MEM
 399                 instance->io_port = overrides[current_override].NCR5380_map_name;
 400                 instance->n_io_port = region_size;
 401
 402                 /*
 403                  * On NCR53C400 boards, NCR5380 registers are mapped 8 past
 404                  * the base address.
 405                  */
 406                 if (overrides[current_override].board == BOARD_NCR53C400)
 407                         instance->io_port += 8;
 408 #else
 409                 instance->base = overrides[current_override].NCR5380_map_name;
 410                 ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
 411 #endif
 412
 413                 if (NCR5380_init(instance, flags))
 414                         goto out_unregister;
 415
 416                 if (overrides[current_override].board == BOARD_NCR53C400)
 417                         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
 418
 419                 NCR5380_maybe_reset_bus(instance);
 420
 421                 if (overrides[current_override].irq != IRQ_AUTO)
 422                         instance->irq = overrides[current_override].irq;
 423                 else
 424                         instance->irq = NCR5380_probe_irq(instance, 0xffff);
 425
 426                 /* Compatibility with documented NCR5380 kernel parameters */
 427                 if (instance->irq == 255)
 428                         instance->irq = NO_IRQ;
 429
 430                 if (instance->irq != NO_IRQ)
 431                         if (request_irq(instance->irq, generic_NCR5380_intr,
 432                                         0, "NCR5380", instance)) {
 433                                 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
 434                                 instance->irq = NO_IRQ;
 435                         }
 436
 437                 if (instance->irq == NO_IRQ) {
 438                         printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
 439                         printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
 440                 }
 441
 442                 ++current_override;
 443                 ++count;
 444         }
 445         return count;
 446
 447 out_unregister:
 448         scsi_unregister(instance);
 449 out_release:
 450 #ifndef SCSI_G_NCR5380_MEM
 451         release_region(overrides[current_override].NCR5380_map_name, region_size);
 452 #else
 453         iounmap(iomem);
 454         release_mem_region(base, NCR5380_region_size);
 455 #endif
 456         return count;
 457 }
 458
 459 /**
 460  *      generic_NCR5380_release_resources       -       free resources
 461  *      @instance: host adapter to clean up
 462  *
 463  *      Free the generic interface resources from this adapter.
 464  *
 465  *      Locks: none
 466  */
 467
 468 static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
 469 {
 470         if (instance->irq != NO_IRQ)
 471                 free_irq(instance->irq, instance);
 472         NCR5380_exit(instance);
 473 #ifndef SCSI_G_NCR5380_MEM
 474         release_region(instance->io_port, instance->n_io_port);
 475 #else
 476         iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
 477         release_mem_region(instance->base, NCR5380_region_size);
 478 #endif
 479         return 0;
 480 }
 481
 482 #ifdef BIOSPARAM
 483 /**
 484  *      generic_NCR5380_biosparam
 485  *      @disk: disk to compute geometry for
 486  *      @dev: device identifier for this disk
 487  *      @ip: sizes to fill in
 488  *
 489  *      Generates a BIOS / DOS compatible H-C-S mapping for the specified
 490  *      device / size.
 491  *
 492  *      XXX Most SCSI boards use this mapping, I could be incorrect.  Someone
 493  *      using hard disks on a trantor should verify that this mapping
 494  *      corresponds to that used by the BIOS / ASPI driver by running the linux
 495  *      fdisk program and matching the H_C_S coordinates to what DOS uses.
 496  *
 497  *      Locks: none
 498  */
 499
 500 static int
 501 generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 502                           sector_t capacity, int *ip)
 503 {
 504         ip[0] = 64;
 505         ip[1] = 32;
 506         ip[2] = capacity >> 11;
 507         return 0;
 508 }
 509 #endif
 510
 511 #ifdef PSEUDO_DMA
 512
 513 /**
 514  *      NCR5380_pread           -       pseudo DMA read
 515  *      @instance: adapter to read from
 516  *      @dst: buffer to read into
 517  *      @len: buffer length
 518  *
 519  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 520  *      controller
 521  */
 522
 523 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
 524 {
 525 #ifdef SCSI_G_NCR5380_MEM
 526         struct NCR5380_hostdata *hostdata = shost_priv(instance);
 527 #endif
 528         int blocks = len / 128;
 529         int start = 0;
 530         int bl;
 531
 532         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
 533         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 534         while (1) {
 535                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 536                         break;
 537                 }
 538                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 539                         printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 540                         return -1;
 541                 }
 542                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
 543
 544 #ifndef SCSI_G_NCR5380_MEM
 545                 {
 546                         int i;
 547                         for (i = 0; i < 128; i++)
 548                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 549                 }
 550 #else
 551                 /* implies SCSI_G_NCR5380_MEM */
 552                 memcpy_fromio(dst + start,
 553                               hostdata->iomem + NCR53C400_host_buffer, 128);
 554 #endif
 555                 start += 128;
 556                 blocks--;
 557         }
 558
 559         if (blocks) {
 560                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 561                 {
 562                         // FIXME - no timeout
 563                 }
 564
 565 #ifndef SCSI_G_NCR5380_MEM
 566                 {
 567                         int i;
 568                         for (i = 0; i < 128; i++)
 569                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 570                 }
 571 #else
 572                 /* implies SCSI_G_NCR5380_MEM */
 573                 memcpy_fromio(dst + start,
 574                               hostdata->iomem + NCR53C400_host_buffer, 128);
 575 #endif
 576                 start += 128;
 577                 blocks--;
 578         }
 579
 580         if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 581                 printk("53C400r: no 53C80 gated irq after transfer");
 582
 583 #if 0
 584         /*
 585          *      DON'T DO THIS - THEY NEVER ARRIVE!
 586          */
 587         printk("53C400r: Waiting for 53C80 registers\n");
 588         while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
 589                 ;
 590 #endif
 591         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
 592                 printk(KERN_ERR "53C400r: no end dma signal\n");
 593
 594         return 0;
 595 }
 596
 597 /**
 598  *      NCR5380_write           -       pseudo DMA write
 599  *      @instance: adapter to read from
 600  *      @dst: buffer to read into
 601  *      @len: buffer length
 602  *
 603  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 604  *      controller
 605  */
 606
 607 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
 608 {
 609 #ifdef SCSI_G_NCR5380_MEM
 610         struct NCR5380_hostdata *hostdata = shost_priv(instance);
 611 #endif
 612         int blocks = len / 128;
 613         int start = 0;
 614         int bl;
 615         int i;
 616
 617         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
 618         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 619         while (1) {
 620                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 621                         printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 622                         return -1;
 623                 }
 624
 625                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 626                         break;
 627                 }
 628                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 629                         ; // FIXME - timeout
 630 #ifndef SCSI_G_NCR5380_MEM
 631                 {
 632                         for (i = 0; i < 128; i++)
 633                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 634                 }
 635 #else
 636                 /* implies SCSI_G_NCR5380_MEM */
 637                 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
 638                             src + start, 128);
 639 #endif
 640                 start += 128;
 641                 blocks--;
 642         }
 643         if (blocks) {
 644                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 645                         ; // FIXME - no timeout
 646
 647 #ifndef SCSI_G_NCR5380_MEM
 648                 {
 649                         for (i = 0; i < 128; i++)
 650                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 651                 }
 652 #else
 653                 /* implies SCSI_G_NCR5380_MEM */
 654                 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
 655                             src + start, 128);
 656 #endif
 657                 start += 128;
 658                 blocks--;
 659         }
 660
 661 #if 0
 662         printk("53C400w: waiting for registers to be available\n");
 663         THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
 664         printk("53C400w: Got em\n");
 665 #endif
 666
 667         /* Let's wait for this instead - could be ugly */
 668         /* All documentation says to check for this. Maybe my hardware is too
 669          * fast. Waiting for it seems to work fine! KLL
 670          */
 671         while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 672                 ;       // FIXME - no timeout
 673
 674         /*
 675          * I know. i is certainly != 0 here but the loop is new. See previous
 676          * comment.
 677          */
 678         if (i) {
 679                 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
 680                         printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
 681         } else
 682                 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
 683
 684 #if 0
 685         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
 686                 printk(KERN_ERR "53C400w: no end dma signal\n");
 687         }
 688 #endif
 689         while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
 690                 ;       // TIMEOUT
 691         return 0;
 692 }
 693
 694 static int generic_NCR5380_dma_xfer_len(struct scsi_cmnd *cmd)
 695 {
 696         int transfersize = cmd->transfersize;
 697
 698         /* Limit transfers to 32K, for xx400 & xx406
 699          * pseudoDMA that transfers in 128 bytes blocks.
 700          */
 701         if (transfersize > 32 * 1024 && cmd->SCp.this_residual &&
 702             !(cmd->SCp.this_residual % transfersize))
 703                 transfersize = 32 * 1024;
 704
 705         return transfersize;
 706 }
 707
 708 #endif /* PSEUDO_DMA */
 709
 710 /*
 711  *      Include the NCR5380 core code that we build our driver around
 712  */
 713
 714 #include "NCR5380.c"
 715
 716 static struct scsi_host_template driver_template = {
 717         .proc_name              = DRV_MODULE_NAME,
 718         .name                   = "Generic NCR5380/NCR53C400 SCSI",
 719         .detect                 = generic_NCR5380_detect,
 720         .release                = generic_NCR5380_release_resources,
 721         .info                   = generic_NCR5380_info,
 722         .queuecommand           = generic_NCR5380_queue_command,
 723         .eh_abort_handler       = generic_NCR5380_abort,
 724         .eh_bus_reset_handler   = generic_NCR5380_bus_reset,
 725         .bios_param             = NCR5380_BIOSPARAM,
 726         .can_queue              = 16,
 727         .this_id                = 7,
 728         .sg_tablesize           = SG_ALL,
 729         .cmd_per_lun            = 2,
 730         .use_clustering         = DISABLE_CLUSTERING,
 731         .cmd_size               = NCR5380_CMD_SIZE,
 732 };
 733
 734 #include "scsi_module.c"
 735
 736 module_param(ncr_irq, int, 0);
 737 module_param(ncr_dma, int, 0);
 738 module_param(ncr_addr, int, 0);
 739 module_param(ncr_5380, int, 0);
 740 module_param(ncr_53c400, int, 0);
 741 module_param(ncr_53c400a, int, 0);
 742 module_param(dtc_3181e, int, 0);
 743 MODULE_LICENSE("GPL");
 744
 745 #if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
 746 static struct isapnp_device_id id_table[] = {
 747         {
 748          ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 749          ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
 750          0},
 751         {0}
 752 };
 753
 754 MODULE_DEVICE_TABLE(isapnp, id_table);
 755 #endif
 756
 757 __setup("ncr5380=", do_NCR5380_setup);
 758 __setup("ncr53c400=", do_NCR53C400_setup);
 759 __setup("ncr53c400a=", do_NCR53C400A_setup);
 760 __setup("dtc3181e=", do_DTC3181E_setup);