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 #define USLEEP_WAITLONG msecs_to_jiffies(5000)
  63
  64 #define AUTOPROBE_IRQ
  65
  66 #ifdef CONFIG_SCSI_GENERIC_NCR53C400
  67 #define NCR53C400_PSEUDO_DMA 1
  68 #define PSEUDO_DMA
  69 #define NCR53C400
  70 #endif
  71
  72 #include <asm/io.h>
  73 #include <linux/signal.h>
  74 #include <linux/blkdev.h>
  75 #include <scsi/scsi_host.h>
  76 #include "g_NCR5380.h"
  77 #include "NCR5380.h"
  78 #include <linux/stat.h>
  79 #include <linux/init.h>
  80 #include <linux/ioport.h>
  81 #include <linux/isapnp.h>
  82 #include <linux/delay.h>
  83 #include <linux/interrupt.h>
  84
  85 #define NCR_NOT_SET 0
  86 static int ncr_irq = NCR_NOT_SET;
  87 static int ncr_dma = NCR_NOT_SET;
  88 static int ncr_addr = NCR_NOT_SET;
  89 static int ncr_5380 = NCR_NOT_SET;
  90 static int ncr_53c400 = NCR_NOT_SET;
  91 static int ncr_53c400a = NCR_NOT_SET;
  92 static int dtc_3181e = NCR_NOT_SET;
  93
  94 static struct override {
  95         NCR5380_map_type NCR5380_map_name;
  96         int irq;
  97         int dma;
  98         int board;              /* Use NCR53c400, Ricoh, etc. extensions ? */
  99 } overrides
 100 #ifdef GENERIC_NCR5380_OVERRIDE
 101 [] __initdata = GENERIC_NCR5380_OVERRIDE;
 102 #else
 103 [1] __initdata = { { 0,},};
 104 #endif
 105
 106 #define NO_OVERRIDES ARRAY_SIZE(overrides)
 107
 108 #ifndef MODULE
 109
 110 /**
 111  *      internal_setup          -       handle lilo command string override
 112  *      @board: BOARD_* identifier for the board
 113  *      @str: unused
 114  *      @ints: numeric parameters
 115  *
 116  *      Do LILO command line initialization of the overrides array. Display
 117  *      errors when needed
 118  *
 119  *      Locks: none
 120  */
 121
 122 static void __init internal_setup(int board, char *str, int *ints)
 123 {
 124         static int commandline_current = 0;
 125         switch (board) {
 126         case BOARD_NCR5380:
 127                 if (ints[0] != 2 && ints[0] != 3) {
 128                         printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
 129                         return;
 130                 }
 131                 break;
 132         case BOARD_NCR53C400:
 133                 if (ints[0] != 2) {
 134                         printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
 135                         return;
 136                 }
 137                 break;
 138         case BOARD_NCR53C400A:
 139                 if (ints[0] != 2) {
 140                         printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
 141                         return;
 142                 }
 143                 break;
 144         case BOARD_DTC3181E:
 145                 if (ints[0] != 2) {
 146                         printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
 147                         return;
 148                 }
 149                 break;
 150         }
 151
 152         if (commandline_current < NO_OVERRIDES) {
 153                 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
 154                 overrides[commandline_current].irq = ints[2];
 155                 if (ints[0] == 3)
 156                         overrides[commandline_current].dma = ints[3];
 157                 else
 158                         overrides[commandline_current].dma = DMA_NONE;
 159                 overrides[commandline_current].board = board;
 160                 ++commandline_current;
 161         }
 162 }
 163
 164
 165 /**
 166  *      do_NCR53C80_setup               -       set up entry point
 167  *      @str: unused
 168  *
 169  *      Setup function invoked at boot to parse the ncr5380= command
 170  *      line.
 171  */
 172
 173 static int __init do_NCR5380_setup(char *str)
 174 {
 175         int ints[10];
 176
 177         get_options(str, ARRAY_SIZE(ints), ints);
 178         internal_setup(BOARD_NCR5380, str, ints);
 179         return 1;
 180 }
 181
 182 /**
 183  *      do_NCR53C400_setup              -       set up entry point
 184  *      @str: unused
 185  *      @ints: integer parameters from kernel setup code
 186  *
 187  *      Setup function invoked at boot to parse the ncr53c400= command
 188  *      line.
 189  */
 190
 191 static int __init do_NCR53C400_setup(char *str)
 192 {
 193         int ints[10];
 194
 195         get_options(str, ARRAY_SIZE(ints), ints);
 196         internal_setup(BOARD_NCR53C400, str, ints);
 197         return 1;
 198 }
 199
 200 /**
 201  *      do_NCR53C400A_setup     -       set up entry point
 202  *      @str: unused
 203  *      @ints: integer parameters from kernel setup code
 204  *
 205  *      Setup function invoked at boot to parse the ncr53c400a= command
 206  *      line.
 207  */
 208
 209 static int __init do_NCR53C400A_setup(char *str)
 210 {
 211         int ints[10];
 212
 213         get_options(str, ARRAY_SIZE(ints), ints);
 214         internal_setup(BOARD_NCR53C400A, str, ints);
 215         return 1;
 216 }
 217
 218 /**
 219  *      do_DTC3181E_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 dtc3181e= command
 224  *      line.
 225  */
 226
 227 static int __init do_DTC3181E_setup(char *str)
 228 {
 229         int ints[10];
 230
 231         get_options(str, ARRAY_SIZE(ints), ints);
 232         internal_setup(BOARD_DTC3181E, str, ints);
 233         return 1;
 234 }
 235
 236 #endif
 237
 238 /**
 239  *      generic_NCR5380_detect  -       look for NCR5380 controllers
 240  *      @tpnt: the scsi template
 241  *
 242  *      Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
 243  *      and DTC436(ISAPnP) controllers. If overrides have been set we use
 244  *      them.
 245  *
 246  *      The caller supplied NCR5380_init function is invoked from here, before
 247  *      the interrupt line is taken.
 248  *
 249  *      Locks: none
 250  */
 251
 252 static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 253 {
 254         static int current_override = 0;
 255         int count;
 256         unsigned int *ports;
 257 #ifndef SCSI_G_NCR5380_MEM
 258         int i;
 259         unsigned long region_size = 16;
 260 #endif
 261         static unsigned int __initdata ncr_53c400a_ports[] = {
 262                 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
 263         };
 264         static unsigned int __initdata dtc_3181e_ports[] = {
 265                 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
 266         };
 267         int flags = 0;
 268         struct Scsi_Host *instance;
 269 #ifdef SCSI_G_NCR5380_MEM
 270         unsigned long base;
 271         void __iomem *iomem;
 272 #endif
 273
 274         if (ncr_irq != NCR_NOT_SET)
 275                 overrides[0].irq = ncr_irq;
 276         if (ncr_dma != NCR_NOT_SET)
 277                 overrides[0].dma = ncr_dma;
 278         if (ncr_addr != NCR_NOT_SET)
 279                 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
 280         if (ncr_5380 != NCR_NOT_SET)
 281                 overrides[0].board = BOARD_NCR5380;
 282         else if (ncr_53c400 != NCR_NOT_SET)
 283                 overrides[0].board = BOARD_NCR53C400;
 284         else if (ncr_53c400a != NCR_NOT_SET)
 285                 overrides[0].board = BOARD_NCR53C400A;
 286         else if (dtc_3181e != NCR_NOT_SET)
 287                 overrides[0].board = BOARD_DTC3181E;
 288 #ifndef SCSI_G_NCR5380_MEM
 289         if (!current_override && isapnp_present()) {
 290                 struct pnp_dev *dev = NULL;
 291                 count = 0;
 292                 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
 293                         if (count >= NO_OVERRIDES)
 294                                 break;
 295                         if (pnp_device_attach(dev) < 0)
 296                                 continue;
 297                         if (pnp_activate_dev(dev) < 0) {
 298                                 printk(KERN_ERR "dtc436e probe: activate failed\n");
 299                                 pnp_device_detach(dev);
 300                                 continue;
 301                         }
 302                         if (!pnp_port_valid(dev, 0)) {
 303                                 printk(KERN_ERR "dtc436e probe: no valid port\n");
 304                                 pnp_device_detach(dev);
 305                                 continue;
 306                         }
 307                         if (pnp_irq_valid(dev, 0))
 308                                 overrides[count].irq = pnp_irq(dev, 0);
 309                         else
 310                                 overrides[count].irq = NO_IRQ;
 311                         if (pnp_dma_valid(dev, 0))
 312                                 overrides[count].dma = pnp_dma(dev, 0);
 313                         else
 314                                 overrides[count].dma = DMA_NONE;
 315                         overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
 316                         overrides[count].board = BOARD_DTC3181E;
 317                         count++;
 318                 }
 319         }
 320 #endif
 321         tpnt->proc_name = "g_NCR5380";
 322
 323         for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
 324                 if (!(overrides[current_override].NCR5380_map_name))
 325                         continue;
 326
 327                 ports = NULL;
 328                 switch (overrides[current_override].board) {
 329                 case BOARD_NCR5380:
 330                         flags = FLAG_NO_PSEUDO_DMA;
 331                         break;
 332                 case BOARD_NCR53C400:
 333                         flags = FLAG_NCR53C400;
 334                         break;
 335                 case BOARD_NCR53C400A:
 336                         flags = FLAG_NO_PSEUDO_DMA;
 337                         ports = ncr_53c400a_ports;
 338                         break;
 339                 case BOARD_DTC3181E:
 340                         flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
 341                         ports = dtc_3181e_ports;
 342                         break;
 343                 }
 344
 345 #ifndef SCSI_G_NCR5380_MEM
 346                 if (ports) {
 347                         /* wakeup sequence for the NCR53C400A and DTC3181E */
 348
 349                         /* Disable the adapter and look for a free io port */
 350                         outb(0x59, 0x779);
 351                         outb(0xb9, 0x379);
 352                         outb(0xc5, 0x379);
 353                         outb(0xae, 0x379);
 354                         outb(0xa6, 0x379);
 355                         outb(0x00, 0x379);
 356
 357                         if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
 358                                 for (i = 0; ports[i]; i++) {
 359                                         if (!request_region(ports[i],  16, "ncr53c80"))
 360                                                 continue;
 361                                         if (overrides[current_override].NCR5380_map_name == ports[i])
 362                                                 break;
 363                                         release_region(ports[i], 16);
 364                         } else
 365                                 for (i = 0; ports[i]; i++) {
 366                                         if (!request_region(ports[i],  16, "ncr53c80"))
 367                                                 continue;
 368                                         if (inb(ports[i]) == 0xff)
 369                                                 break;
 370                                         release_region(ports[i], 16);
 371                                 }
 372                         if (ports[i]) {
 373                                 /* At this point we have our region reserved */
 374                                 outb(0x59, 0x779);
 375                                 outb(0xb9, 0x379);
 376                                 outb(0xc5, 0x379);
 377                                 outb(0xae, 0x379);
 378                                 outb(0xa6, 0x379);
 379                                 outb(0x80 | i, 0x379);  /* set io port to be used */
 380                                 outb(0xc0, ports[i] + 9);
 381                                 if (inb(ports[i] + 9) != 0x80)
 382                                         continue;
 383                                 else
 384                                         overrides[current_override].NCR5380_map_name = ports[i];
 385                         } else
 386                                 continue;
 387                 }
 388                 else
 389                 {
 390                         /* Not a 53C400A style setup - just grab */
 391                         if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
 392                                 continue;
 393                         region_size = NCR5380_region_size;
 394                 }
 395 #else
 396                 base = overrides[current_override].NCR5380_map_name;
 397                 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
 398                         continue;
 399                 iomem = ioremap(base, NCR5380_region_size);
 400                 if (!iomem) {
 401                         release_mem_region(base, NCR5380_region_size);
 402                         continue;
 403                 }
 404 #endif
 405                 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
 406                 if (instance == NULL) {
 407 #ifndef SCSI_G_NCR5380_MEM
 408                         release_region(overrides[current_override].NCR5380_map_name, region_size);
 409 #else
 410                         iounmap(iomem);
 411                         release_mem_region(base, NCR5380_region_size);
 412 #endif
 413                         continue;
 414                 }
 415
 416                 instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name;
 417 #ifndef SCSI_G_NCR5380_MEM
 418                 instance->n_io_port = region_size;
 419 #else
 420                 ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
 421 #endif
 422
 423                 NCR5380_init(instance, flags);
 424
 425                 if (overrides[current_override].irq != IRQ_AUTO)
 426                         instance->irq = overrides[current_override].irq;
 427                 else
 428                         instance->irq = NCR5380_probe_irq(instance, 0xffff);
 429
 430                 /* Compatibility with documented NCR5380 kernel parameters */
 431                 if (instance->irq == 255)
 432                         instance->irq = NO_IRQ;
 433
 434                 if (instance->irq != NO_IRQ)
 435                         if (request_irq(instance->irq, generic_NCR5380_intr,
 436                                         0, "NCR5380", instance)) {
 437                                 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
 438                                 instance->irq = NO_IRQ;
 439                         }
 440
 441                 if (instance->irq == NO_IRQ) {
 442                         printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
 443                         printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
 444                 }
 445
 446                 ++current_override;
 447                 ++count;
 448         }
 449         return count;
 450 }
 451
 452 /**
 453  *      generic_NCR5380_release_resources       -       free resources
 454  *      @instance: host adapter to clean up
 455  *
 456  *      Free the generic interface resources from this adapter.
 457  *
 458  *      Locks: none
 459  */
 460
 461 static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
 462 {
 463         NCR5380_local_declare();
 464         NCR5380_setup(instance);
 465
 466         if (instance->irq != NO_IRQ)
 467                 free_irq(instance->irq, instance);
 468         NCR5380_exit(instance);
 469
 470 #ifndef SCSI_G_NCR5380_MEM
 471         release_region(instance->NCR5380_instance_name, instance->n_io_port);
 472 #else
 473         iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
 474         release_mem_region(instance->NCR5380_instance_name, NCR5380_region_size);
 475 #endif
 476
 477
 478         return 0;
 479 }
 480
 481 #ifdef BIOSPARAM
 482 /**
 483  *      generic_NCR5380_biosparam
 484  *      @disk: disk to compute geometry for
 485  *      @dev: device identifier for this disk
 486  *      @ip: sizes to fill in
 487  *
 488  *      Generates a BIOS / DOS compatible H-C-S mapping for the specified
 489  *      device / size.
 490  *
 491  *      XXX Most SCSI boards use this mapping, I could be incorrect.  Someone
 492  *      using hard disks on a trantor should verify that this mapping
 493  *      corresponds to that used by the BIOS / ASPI driver by running the linux
 494  *      fdisk program and matching the H_C_S coordinates to what DOS uses.
 495  *
 496  *      Locks: none
 497  */
 498
 499 static int
 500 generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 501                           sector_t capacity, int *ip)
 502 {
 503         ip[0] = 64;
 504         ip[1] = 32;
 505         ip[2] = capacity >> 11;
 506         return 0;
 507 }
 508 #endif
 509
 510 #ifdef NCR53C400_PSEUDO_DMA
 511
 512 /**
 513  *      NCR5380_pread           -       pseudo DMA read
 514  *      @instance: adapter to read from
 515  *      @dst: buffer to read into
 516  *      @len: buffer length
 517  *
 518  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 519  *      controller
 520  */
 521
 522 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
 523 {
 524         int blocks = len / 128;
 525         int start = 0;
 526         int bl;
 527
 528         NCR5380_local_declare();
 529         NCR5380_setup(instance);
 530
 531         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
 532         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 533         while (1) {
 534                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 535                         break;
 536                 }
 537                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 538                         printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 539                         return -1;
 540                 }
 541                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
 542
 543 #ifndef SCSI_G_NCR5380_MEM
 544                 {
 545                         int i;
 546                         for (i = 0; i < 128; i++)
 547                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 548                 }
 549 #else
 550                 /* implies SCSI_G_NCR5380_MEM */
 551                 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
 552 #endif
 553                 start += 128;
 554                 blocks--;
 555         }
 556
 557         if (blocks) {
 558                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 559                 {
 560                         // FIXME - no timeout
 561                 }
 562
 563 #ifndef SCSI_G_NCR5380_MEM
 564                 {
 565                         int i;
 566                         for (i = 0; i < 128; i++)
 567                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 568                 }
 569 #else
 570                 /* implies SCSI_G_NCR5380_MEM */
 571                 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
 572 #endif
 573                 start += 128;
 574                 blocks--;
 575         }
 576
 577         if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 578                 printk("53C400r: no 53C80 gated irq after transfer");
 579
 580 #if 0
 581         /*
 582          *      DON'T DO THIS - THEY NEVER ARRIVE!
 583          */
 584         printk("53C400r: Waiting for 53C80 registers\n");
 585         while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
 586                 ;
 587 #endif
 588         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
 589                 printk(KERN_ERR "53C400r: no end dma signal\n");
 590
 591         NCR5380_write(MODE_REG, MR_BASE);
 592         NCR5380_read(RESET_PARITY_INTERRUPT_REG);
 593         return 0;
 594 }
 595
 596 /**
 597  *      NCR5380_write           -       pseudo DMA write
 598  *      @instance: adapter to read from
 599  *      @dst: buffer to read into
 600  *      @len: buffer length
 601  *
 602  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 603  *      controller
 604  */
 605
 606 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
 607 {
 608         int blocks = len / 128;
 609         int start = 0;
 610         int bl;
 611         int i;
 612
 613         NCR5380_local_declare();
 614         NCR5380_setup(instance);
 615
 616         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
 617         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 618         while (1) {
 619                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 620                         printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 621                         return -1;
 622                 }
 623
 624                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 625                         break;
 626                 }
 627                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 628                         ; // FIXME - timeout
 629 #ifndef SCSI_G_NCR5380_MEM
 630                 {
 631                         for (i = 0; i < 128; i++)
 632                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 633                 }
 634 #else
 635                 /* implies SCSI_G_NCR5380_MEM */
 636                 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
 637 #endif
 638                 start += 128;
 639                 blocks--;
 640         }
 641         if (blocks) {
 642                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 643                         ; // FIXME - no timeout
 644
 645 #ifndef SCSI_G_NCR5380_MEM
 646                 {
 647                         for (i = 0; i < 128; i++)
 648                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 649                 }
 650 #else
 651                 /* implies SCSI_G_NCR5380_MEM */
 652                 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
 653 #endif
 654                 start += 128;
 655                 blocks--;
 656         }
 657
 658 #if 0
 659         printk("53C400w: waiting for registers to be available\n");
 660         THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
 661         printk("53C400w: Got em\n");
 662 #endif
 663
 664         /* Let's wait for this instead - could be ugly */
 665         /* All documentation says to check for this. Maybe my hardware is too
 666          * fast. Waiting for it seems to work fine! KLL
 667          */
 668         while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 669                 ;       // FIXME - no timeout
 670
 671         /*
 672          * I know. i is certainly != 0 here but the loop is new. See previous
 673          * comment.
 674          */
 675         if (i) {
 676                 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
 677                         printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
 678         } else
 679                 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
 680
 681 #if 0
 682         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
 683                 printk(KERN_ERR "53C400w: no end dma signal\n");
 684         }
 685 #endif
 686         while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
 687                 ;       // TIMEOUT
 688         return 0;
 689 }
 690 #endif                          /* PSEUDO_DMA */
 691
 692 /*
 693  *      Include the NCR5380 core code that we build our driver around
 694  */
 695
 696 #include "NCR5380.c"
 697
 698 static struct scsi_host_template driver_template = {
 699         .show_info              = generic_NCR5380_show_info,
 700         .name                   = "Generic NCR5380/NCR53C400 SCSI",
 701         .detect                 = generic_NCR5380_detect,
 702         .release                = generic_NCR5380_release_resources,
 703         .info                   = generic_NCR5380_info,
 704         .queuecommand           = generic_NCR5380_queue_command,
 705         .eh_abort_handler       = generic_NCR5380_abort,
 706         .eh_bus_reset_handler   = generic_NCR5380_bus_reset,
 707         .bios_param             = NCR5380_BIOSPARAM,
 708         .can_queue              = CAN_QUEUE,
 709         .this_id                = 7,
 710         .sg_tablesize           = SG_ALL,
 711         .cmd_per_lun            = CMD_PER_LUN,
 712         .use_clustering         = DISABLE_CLUSTERING,
 713 };
 714 #include <linux/module.h>
 715 #include "scsi_module.c"
 716
 717 module_param(ncr_irq, int, 0);
 718 module_param(ncr_dma, int, 0);
 719 module_param(ncr_addr, int, 0);
 720 module_param(ncr_5380, int, 0);
 721 module_param(ncr_53c400, int, 0);
 722 module_param(ncr_53c400a, int, 0);
 723 module_param(dtc_3181e, int, 0);
 724 MODULE_LICENSE("GPL");
 725
 726 #if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
 727 static struct isapnp_device_id id_table[] = {
 728         {
 729          ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 730          ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
 731          0},
 732         {0}
 733 };
 734
 735 MODULE_DEVICE_TABLE(isapnp, id_table);
 736 #endif
 737
 738 __setup("ncr5380=", do_NCR5380_setup);
 739 __setup("ncr53c400=", do_NCR53C400_setup);
 740 __setup("ncr53c400a=", do_NCR53C400A_setup);
 741 __setup("dtc3181e=", do_DTC3181E_setup);