drivers/scsi/g_NCR5380.c

   1 /*
   2  * Generic Generic NCR5380 driver
   3  *
   4  * Copyright 1993, Drew Eckhardt
   5  *      Visionary Computing
   6  *      (Unix and Linux consulting and custom programming)
   7  *      drew@colorado.edu
   8  *      +1 (303) 440-4894
   9  *
  10  * NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin
  11  *    K.Lentin@cs.monash.edu.au
  12  *
  13  * NCR53C400A extensions (c) 1996, Ingmar Baumgart
  14  *    ingmar@gonzo.schwaben.de
  15  *
  16  * DTC3181E extensions (c) 1997, Ronald van Cuijlenborg
  17  * ronald.van.cuijlenborg@tip.nl or nutty@dds.nl
  18  *
  19  * Added ISAPNP support for DTC436 adapters,
  20  * Thomas Sailer, sailer@ife.ee.ethz.ch
  21  *
  22  * ALPHA RELEASE 1.
  23  *
  24  * For more information, please consult
  25  *
  26  * NCR 5380 Family
  27  * SCSI Protocol Controller
  28  * Databook
  29  *
  30  * NCR Microelectronics
  31  * 1635 Aeroplaza Drive
  32  * Colorado Springs, CO 80916
  33  * 1+ (719) 578-3400
  34  * 1+ (800) 334-5454
  35  */
  36
  37 /*
  38  * TODO : flesh out DMA support, find some one actually using this (I have
  39  *      a memory mapped Trantor board that works fine)
  40  */
  41
  42 /*
  43  * Options :
  44  *
  45  * PARITY - enable parity checking.  Not supported.
  46  *
  47  * SCSI2 - enable support for SCSI-II tagged queueing.  Untested.
  48  *
  49  * USLEEP - enable support for devices that don't disconnect.  Untested.
  50  *
  51  * The card is detected and initialized in one of several ways :
  52  * 1.  With command line overrides - NCR5380=port,irq may be
  53  *     used on the LILO command line to override the defaults.
  54  *
  55  * 2.  With the GENERIC_NCR5380_OVERRIDE compile time define.  This is
  56  *     specified as an array of address, irq, dma, board tuples.  Ie, for
  57  *     one board at 0x350, IRQ5, no dma, I could say
  58  *     -DGENERIC_NCR5380_OVERRIDE={{0xcc000, 5, DMA_NONE, BOARD_NCR5380}}
  59  *
  60  * -1 should be specified for no or DMA interrupt, -2 to autoprobe for an
  61  *      IRQ line if overridden on the command line.
  62  *
  63  * 3.  When included as a module, with arguments passed on the command line:
  64  *         ncr_irq=xx   the interrupt
  65  *         ncr_addr=xx  the port or base address (for port or memory
  66  *                      mapped, resp.)
  67  *         ncr_dma=xx   the DMA
  68  *         ncr_5380=1   to set up for a NCR5380 board
  69  *         ncr_53c400=1 to set up for a NCR53C400 board
  70  *     e.g.
  71  *     modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
  72  *       for a port mapped NCR5380 board or
  73  *     modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
  74  *       for a memory mapped NCR53C400 board with interrupts disabled.
  75  *
  76  * 255 should be specified for no or DMA interrupt, 254 to autoprobe for an
  77  *      IRQ line if overridden on the command line.
  78  *
  79  */
  80
  81 /*
  82  * $Log: generic_NCR5380.c,v $
  83  */
  84
  85 /* settings for DTC3181E card with only Mustek scanner attached */
  86 #define USLEEP
  87 #define USLEEP_POLL     1
  88 #define USLEEP_SLEEP    20
  89 #define USLEEP_WAITLONG 500
  90
  91 #define AUTOPROBE_IRQ
  92 #define AUTOSENSE
  93
  94
  95 #ifdef CONFIG_SCSI_GENERIC_NCR53C400
  96 #define NCR53C400_PSEUDO_DMA 1
  97 #define PSEUDO_DMA
  98 #define NCR53C400
  99 #define NCR5380_STATS
 100 #undef NCR5380_STAT_LIMIT
 101 #endif
 102
 103 #include <asm/io.h>
 104 #include <linux/signal.h>
 105 #include <linux/blkdev.h>
 106 #include "scsi.h"
 107 #include <scsi/scsi_host.h>
 108 #include "g_NCR5380.h"
 109 #include "NCR5380.h"
 110 #include <linux/stat.h>
 111 #include <linux/init.h>
 112 #include <linux/ioport.h>
 113 #include <linux/isapnp.h>
 114 #include <linux/delay.h>
 115 #include <linux/interrupt.h>
 116
 117 #define NCR_NOT_SET 0
 118 static int ncr_irq = NCR_NOT_SET;
 119 static int ncr_dma = NCR_NOT_SET;
 120 static int ncr_addr = NCR_NOT_SET;
 121 static int ncr_5380 = NCR_NOT_SET;
 122 static int ncr_53c400 = NCR_NOT_SET;
 123 static int ncr_53c400a = NCR_NOT_SET;
 124 static int dtc_3181e = NCR_NOT_SET;
 125
 126 static struct override {
 127         NCR5380_map_type NCR5380_map_name;
 128         int irq;
 129         int dma;
 130         int board;              /* Use NCR53c400, Ricoh, etc. extensions ? */
 131 } overrides
 132 #ifdef GENERIC_NCR5380_OVERRIDE
 133 [] __initdata = GENERIC_NCR5380_OVERRIDE;
 134 #else
 135 [1] __initdata = { { 0,},};
 136 #endif
 137
 138 #define NO_OVERRIDES ARRAY_SIZE(overrides)
 139
 140 #ifndef MODULE
 141
 142 /**
 143  *      internal_setup          -       handle lilo command string override
 144  *      @board: BOARD_* identifier for the board
 145  *      @str: unused
 146  *      @ints: numeric parameters
 147  *
 148  *      Do LILO command line initialization of the overrides array. Display
 149  *      errors when needed
 150  *
 151  *      Locks: none
 152  */
 153
 154 static void __init internal_setup(int board, char *str, int *ints)
 155 {
 156         static int commandline_current = 0;
 157         switch (board) {
 158         case BOARD_NCR5380:
 159                 if (ints[0] != 2 && ints[0] != 3) {
 160                         printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
 161                         return;
 162                 }
 163                 break;
 164         case BOARD_NCR53C400:
 165                 if (ints[0] != 2) {
 166                         printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
 167                         return;
 168                 }
 169                 break;
 170         case BOARD_NCR53C400A:
 171                 if (ints[0] != 2) {
 172                         printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
 173                         return;
 174                 }
 175                 break;
 176         case BOARD_DTC3181E:
 177                 if (ints[0] != 2) {
 178                         printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
 179                         return;
 180                 }
 181                 break;
 182         }
 183
 184         if (commandline_current < NO_OVERRIDES) {
 185                 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
 186                 overrides[commandline_current].irq = ints[2];
 187                 if (ints[0] == 3)
 188                         overrides[commandline_current].dma = ints[3];
 189                 else
 190                         overrides[commandline_current].dma = DMA_NONE;
 191                 overrides[commandline_current].board = board;
 192                 ++commandline_current;
 193         }
 194 }
 195
 196
 197 /**
 198  *      do_NCR53C80_setup               -       set up entry point
 199  *      @str: unused
 200  *
 201  *      Setup function invoked at boot to parse the ncr5380= command
 202  *      line.
 203  */
 204
 205 static int __init do_NCR5380_setup(char *str)
 206 {
 207         int ints[10];
 208
 209         get_options(str, ARRAY_SIZE(ints), ints);
 210         internal_setup(BOARD_NCR5380, str, ints);
 211         return 1;
 212 }
 213
 214 /**
 215  *      do_NCR53C400_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 ncr53c400= command
 220  *      line.
 221  */
 222
 223 static int __init do_NCR53C400_setup(char *str)
 224 {
 225         int ints[10];
 226
 227         get_options(str, ARRAY_SIZE(ints), ints);
 228         internal_setup(BOARD_NCR53C400, str, ints);
 229         return 1;
 230 }
 231
 232 /**
 233  *      do_NCR53C400A_setup     -       set up entry point
 234  *      @str: unused
 235  *      @ints: integer parameters from kernel setup code
 236  *
 237  *      Setup function invoked at boot to parse the ncr53c400a= command
 238  *      line.
 239  */
 240
 241 static int __init do_NCR53C400A_setup(char *str)
 242 {
 243         int ints[10];
 244
 245         get_options(str, ARRAY_SIZE(ints), ints);
 246         internal_setup(BOARD_NCR53C400A, str, ints);
 247         return 1;
 248 }
 249
 250 /**
 251  *      do_DTC3181E_setup       -       set up entry point
 252  *      @str: unused
 253  *      @ints: integer parameters from kernel setup code
 254  *
 255  *      Setup function invoked at boot to parse the dtc3181e= command
 256  *      line.
 257  */
 258
 259 static int __init do_DTC3181E_setup(char *str)
 260 {
 261         int ints[10];
 262
 263         get_options(str, ARRAY_SIZE(ints), ints);
 264         internal_setup(BOARD_DTC3181E, str, ints);
 265         return 1;
 266 }
 267
 268 #endif
 269
 270 /**
 271  *      generic_NCR5380_detect  -       look for NCR5380 controllers
 272  *      @tpnt: the scsi template
 273  *
 274  *      Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
 275  *      and DTC436(ISAPnP) controllers. If overrides have been set we use
 276  *      them.
 277  *
 278  *      The caller supplied NCR5380_init function is invoked from here, before
 279  *      the interrupt line is taken.
 280  *
 281  *      Locks: none
 282  */
 283
 284 int __init generic_NCR5380_detect(struct scsi_host_template * tpnt)
 285 {
 286         static int current_override = 0;
 287         int count;
 288         unsigned int *ports;
 289 #ifndef SCSI_G_NCR5380_MEM
 290         int i;
 291         unsigned long region_size = 16;
 292 #endif
 293         static unsigned int __initdata ncr_53c400a_ports[] = {
 294                 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
 295         };
 296         static unsigned int __initdata dtc_3181e_ports[] = {
 297                 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
 298         };
 299         int flags = 0;
 300         struct Scsi_Host *instance;
 301 #ifdef SCSI_G_NCR5380_MEM
 302         unsigned long base;
 303         void __iomem *iomem;
 304 #endif
 305
 306         if (ncr_irq != NCR_NOT_SET)
 307                 overrides[0].irq = ncr_irq;
 308         if (ncr_dma != NCR_NOT_SET)
 309                 overrides[0].dma = ncr_dma;
 310         if (ncr_addr != NCR_NOT_SET)
 311                 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
 312         if (ncr_5380 != NCR_NOT_SET)
 313                 overrides[0].board = BOARD_NCR5380;
 314         else if (ncr_53c400 != NCR_NOT_SET)
 315                 overrides[0].board = BOARD_NCR53C400;
 316         else if (ncr_53c400a != NCR_NOT_SET)
 317                 overrides[0].board = BOARD_NCR53C400A;
 318         else if (dtc_3181e != NCR_NOT_SET)
 319                 overrides[0].board = BOARD_DTC3181E;
 320 #ifndef SCSI_G_NCR5380_MEM
 321         if (!current_override && isapnp_present()) {
 322                 struct pnp_dev *dev = NULL;
 323                 count = 0;
 324                 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
 325                         if (count >= NO_OVERRIDES)
 326                                 break;
 327                         if (pnp_device_attach(dev) < 0)
 328                                 continue;
 329                         if (pnp_activate_dev(dev) < 0) {
 330                                 printk(KERN_ERR "dtc436e probe: activate failed\n");
 331                                 pnp_device_detach(dev);
 332                                 continue;
 333                         }
 334                         if (!pnp_port_valid(dev, 0)) {
 335                                 printk(KERN_ERR "dtc436e probe: no valid port\n");
 336                                 pnp_device_detach(dev);
 337                                 continue;
 338                         }
 339                         if (pnp_irq_valid(dev, 0))
 340                                 overrides[count].irq = pnp_irq(dev, 0);
 341                         else
 342                                 overrides[count].irq = SCSI_IRQ_NONE;
 343                         if (pnp_dma_valid(dev, 0))
 344                                 overrides[count].dma = pnp_dma(dev, 0);
 345                         else
 346                                 overrides[count].dma = DMA_NONE;
 347                         overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
 348                         overrides[count].board = BOARD_DTC3181E;
 349                         count++;
 350                 }
 351         }
 352 #endif
 353         tpnt->proc_name = "g_NCR5380";
 354
 355         for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
 356                 if (!(overrides[current_override].NCR5380_map_name))
 357                         continue;
 358
 359                 ports = NULL;
 360                 switch (overrides[current_override].board) {
 361                 case BOARD_NCR5380:
 362                         flags = FLAG_NO_PSEUDO_DMA;
 363                         break;
 364                 case BOARD_NCR53C400:
 365                         flags = FLAG_NCR53C400;
 366                         break;
 367                 case BOARD_NCR53C400A:
 368                         flags = FLAG_NO_PSEUDO_DMA;
 369                         ports = ncr_53c400a_ports;
 370                         break;
 371                 case BOARD_DTC3181E:
 372                         flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
 373                         ports = dtc_3181e_ports;
 374                         break;
 375                 }
 376
 377 #ifndef SCSI_G_NCR5380_MEM
 378                 if (ports) {
 379                         /* wakeup sequence for the NCR53C400A and DTC3181E */
 380
 381                         /* Disable the adapter and look for a free io port */
 382                         outb(0x59, 0x779);
 383                         outb(0xb9, 0x379);
 384                         outb(0xc5, 0x379);
 385                         outb(0xae, 0x379);
 386                         outb(0xa6, 0x379);
 387                         outb(0x00, 0x379);
 388
 389                         if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
 390                                 for (i = 0; ports[i]; i++) {
 391                                         if (!request_region(ports[i],  16, "ncr53c80"))
 392                                                 continue;
 393                                         if (overrides[current_override].NCR5380_map_name == ports[i])
 394                                                 break;
 395                                         release_region(ports[i], 16);
 396                         } else
 397                                 for (i = 0; ports[i]; i++) {
 398                                         if (!request_region(ports[i],  16, "ncr53c80"))
 399                                                 continue;
 400                                         if (inb(ports[i]) == 0xff)
 401                                                 break;
 402                                         release_region(ports[i], 16);
 403                                 }
 404                         if (ports[i]) {
 405                                 /* At this point we have our region reserved */
 406                                 outb(0x59, 0x779);
 407                                 outb(0xb9, 0x379);
 408                                 outb(0xc5, 0x379);
 409                                 outb(0xae, 0x379);
 410                                 outb(0xa6, 0x379);
 411                                 outb(0x80 | i, 0x379);  /* set io port to be used */
 412                                 outb(0xc0, ports[i] + 9);
 413                                 if (inb(ports[i] + 9) != 0x80)
 414                                         continue;
 415                                 else
 416                                         overrides[current_override].NCR5380_map_name = ports[i];
 417                         } else
 418                                 continue;
 419                 }
 420                 else
 421                 {
 422                         /* Not a 53C400A style setup - just grab */
 423                         if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
 424                                 continue;
 425                         region_size = NCR5380_region_size;
 426                 }
 427 #else
 428                 base = overrides[current_override].NCR5380_map_name;
 429                 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
 430                         continue;
 431                 iomem = ioremap(base, NCR5380_region_size);
 432                 if (!iomem) {
 433                         release_mem_region(base, NCR5380_region_size);
 434                         continue;
 435                 }
 436 #endif
 437                 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
 438                 if (instance == NULL) {
 439 #ifndef SCSI_G_NCR5380_MEM
 440                         release_region(overrides[current_override].NCR5380_map_name, region_size);
 441 #else
 442                         iounmap(iomem);
 443                         release_mem_region(base, NCR5380_region_size);
 444 #endif
 445                         continue;
 446                 }
 447
 448                 instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name;
 449 #ifndef SCSI_G_NCR5380_MEM
 450                 instance->n_io_port = region_size;
 451 #else
 452                 ((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
 453 #endif
 454
 455                 NCR5380_init(instance, flags);
 456
 457                 if (overrides[current_override].irq != IRQ_AUTO)
 458                         instance->irq = overrides[current_override].irq;
 459                 else
 460                         instance->irq = NCR5380_probe_irq(instance, 0xffff);
 461
 462                 if (instance->irq != SCSI_IRQ_NONE)
 463                         if (request_irq(instance->irq, generic_NCR5380_intr,
 464                                         IRQF_DISABLED, "NCR5380", instance)) {
 465                                 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
 466                                 instance->irq = SCSI_IRQ_NONE;
 467                         }
 468
 469                 if (instance->irq == SCSI_IRQ_NONE) {
 470                         printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
 471                         printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
 472                 }
 473
 474                 printk(KERN_INFO "scsi%d : at " STRVAL(NCR5380_map_name) " 0x%x", instance->host_no, (unsigned int) instance->NCR5380_instance_name);
 475                 if (instance->irq == SCSI_IRQ_NONE)
 476                         printk(" interrupts disabled");
 477                 else
 478                         printk(" irq %d", instance->irq);
 479                 printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d", CAN_QUEUE, CMD_PER_LUN, GENERIC_NCR5380_PUBLIC_RELEASE);
 480                 NCR5380_print_options(instance);
 481                 printk("\n");
 482
 483                 ++current_override;
 484                 ++count;
 485         }
 486         return count;
 487 }
 488
 489 /**
 490  *      generic_NCR5380_info    -       reporting string
 491  *      @host: NCR5380 to report on
 492  *
 493  *      Report driver information for the NCR5380
 494  */
 495
 496 const char *generic_NCR5380_info(struct Scsi_Host *host)
 497 {
 498         static const char string[] = "Generic NCR5380/53C400 Driver";
 499         return string;
 500 }
 501
 502 /**
 503  *      generic_NCR5380_release_resources       -       free resources
 504  *      @instance: host adapter to clean up
 505  *
 506  *      Free the generic interface resources from this adapter.
 507  *
 508  *      Locks: none
 509  */
 510
 511 int generic_NCR5380_release_resources(struct Scsi_Host *instance)
 512 {
 513         NCR5380_local_declare();
 514         NCR5380_setup(instance);
 515
 516         if (instance->irq != SCSI_IRQ_NONE)
 517                 free_irq(instance->irq, instance);
 518         NCR5380_exit(instance);
 519
 520 #ifndef SCSI_G_NCR5380_MEM
 521         release_region(instance->NCR5380_instance_name, instance->n_io_port);
 522 #else
 523         iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
 524         release_mem_region(instance->NCR5380_instance_name, NCR5380_region_size);
 525 #endif
 526
 527
 528         return 0;
 529 }
 530
 531 #ifdef BIOSPARAM
 532 /**
 533  *      generic_NCR5380_biosparam
 534  *      @disk: disk to compute geometry for
 535  *      @dev: device identifier for this disk
 536  *      @ip: sizes to fill in
 537  *
 538  *      Generates a BIOS / DOS compatible H-C-S mapping for the specified
 539  *      device / size.
 540  *
 541  *      XXX Most SCSI boards use this mapping, I could be incorrect.  Someone
 542  *      using hard disks on a trantor should verify that this mapping
 543  *      corresponds to that used by the BIOS / ASPI driver by running the linux
 544  *      fdisk program and matching the H_C_S coordinates to what DOS uses.
 545  *
 546  *      Locks: none
 547  */
 548
 549 static int
 550 generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 551                           sector_t capacity, int *ip)
 552 {
 553         ip[0] = 64;
 554         ip[1] = 32;
 555         ip[2] = capacity >> 11;
 556         return 0;
 557 }
 558 #endif
 559
 560 #ifdef NCR53C400_PSEUDO_DMA
 561
 562 /**
 563  *      NCR5380_pread           -       pseudo DMA read
 564  *      @instance: adapter to read from
 565  *      @dst: buffer to read into
 566  *      @len: buffer length
 567  *
 568  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 569  *      controller
 570  */
 571
 572 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
 573 {
 574         int blocks = len / 128;
 575         int start = 0;
 576         int bl;
 577
 578         NCR5380_local_declare();
 579         NCR5380_setup(instance);
 580
 581         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
 582         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 583         while (1) {
 584                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 585                         break;
 586                 }
 587                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 588                         printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 589                         return -1;
 590                 }
 591                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
 592
 593 #ifndef SCSI_G_NCR5380_MEM
 594                 {
 595                         int i;
 596                         for (i = 0; i < 128; i++)
 597                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 598                 }
 599 #else
 600                 /* implies SCSI_G_NCR5380_MEM */
 601                 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
 602 #endif
 603                 start += 128;
 604                 blocks--;
 605         }
 606
 607         if (blocks) {
 608                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 609                 {
 610                         // FIXME - no timeout
 611                 }
 612
 613 #ifndef SCSI_G_NCR5380_MEM
 614                 {
 615                         int i;
 616                         for (i = 0; i < 128; i++)
 617                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 618                 }
 619 #else
 620                 /* implies SCSI_G_NCR5380_MEM */
 621                 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
 622 #endif
 623                 start += 128;
 624                 blocks--;
 625         }
 626
 627         if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 628                 printk("53C400r: no 53C80 gated irq after transfer");
 629
 630 #if 0
 631         /*
 632          *      DON'T DO THIS - THEY NEVER ARRIVE!
 633          */
 634         printk("53C400r: Waiting for 53C80 registers\n");
 635         while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
 636                 ;
 637 #endif
 638         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
 639                 printk(KERN_ERR "53C400r: no end dma signal\n");
 640
 641         NCR5380_write(MODE_REG, MR_BASE);
 642         NCR5380_read(RESET_PARITY_INTERRUPT_REG);
 643         return 0;
 644 }
 645
 646 /**
 647  *      NCR5380_write           -       pseudo DMA write
 648  *      @instance: adapter to read from
 649  *      @dst: buffer to read into
 650  *      @len: buffer length
 651  *
 652  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 653  *      controller
 654  */
 655
 656 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
 657 {
 658         int blocks = len / 128;
 659         int start = 0;
 660         int bl;
 661         int i;
 662
 663         NCR5380_local_declare();
 664         NCR5380_setup(instance);
 665
 666         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
 667         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 668         while (1) {
 669                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 670                         printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 671                         return -1;
 672                 }
 673
 674                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 675                         break;
 676                 }
 677                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 678                         ; // FIXME - timeout
 679 #ifndef SCSI_G_NCR5380_MEM
 680                 {
 681                         for (i = 0; i < 128; i++)
 682                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 683                 }
 684 #else
 685                 /* implies SCSI_G_NCR5380_MEM */
 686                 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
 687 #endif
 688                 start += 128;
 689                 blocks--;
 690         }
 691         if (blocks) {
 692                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 693                         ; // FIXME - no timeout
 694
 695 #ifndef SCSI_G_NCR5380_MEM
 696                 {
 697                         for (i = 0; i < 128; i++)
 698                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 699                 }
 700 #else
 701                 /* implies SCSI_G_NCR5380_MEM */
 702                 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
 703 #endif
 704                 start += 128;
 705                 blocks--;
 706         }
 707
 708 #if 0
 709         printk("53C400w: waiting for registers to be available\n");
 710         THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
 711         printk("53C400w: Got em\n");
 712 #endif
 713
 714         /* Let's wait for this instead - could be ugly */
 715         /* All documentation says to check for this. Maybe my hardware is too
 716          * fast. Waiting for it seems to work fine! KLL
 717          */
 718         while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 719                 ;       // FIXME - no timeout
 720
 721         /*
 722          * I know. i is certainly != 0 here but the loop is new. See previous
 723          * comment.
 724          */
 725         if (i) {
 726                 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
 727                         printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
 728         } else
 729                 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
 730
 731 #if 0
 732         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
 733                 printk(KERN_ERR "53C400w: no end dma signal\n");
 734         }
 735 #endif
 736         while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
 737                 ;       // TIMEOUT
 738         return 0;
 739 }
 740 #endif                          /* PSEUDO_DMA */
 741
 742 /*
 743  *      Include the NCR5380 core code that we build our driver around
 744  */
 745
 746 #include "NCR5380.c"
 747
 748 #define PRINTP(x) seq_printf(m, x)
 749 #define ANDP ,
 750
 751 static void sprint_opcode(struct seq_file *m, int opcode)
 752 {
 753         PRINTP("0x%02x " ANDP opcode);
 754 }
 755
 756 static void sprint_command(struct seq_file *m, unsigned char *command)
 757 {
 758         int i, s;
 759         sprint_opcode(m, command[0]);
 760         for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
 761                 PRINTP("%02x " ANDP command[i]);
 762         PRINTP("\n");
 763 }
 764
 765 /**
 766  *      sprintf_Scsi_Cmnd       -       print a scsi command
 767  *      @m: seq_fil to print into
 768  *      @cmd: SCSI command block
 769  *
 770  *      Print out the target and command data in hex
 771  */
 772
 773 static void sprint_Scsi_Cmnd(struct seq_file *m, Scsi_Cmnd * cmd)
 774 {
 775         PRINTP("host number %d destination target %d, lun %d\n" ANDP cmd->device->host->host_no ANDP cmd->device->id ANDP cmd->device->lun);
 776         PRINTP("        command = ");
 777         sprint_command(m, cmd->cmnd);
 778 }
 779
 780 /**
 781  *      generic_NCR5380_proc_info       -       /proc for NCR5380 driver
 782  *      @buffer: buffer to print into
 783  *      @start: start position
 784  *      @offset: offset into buffer
 785  *      @len: length
 786  *      @hostno: instance to affect
 787  *      @inout: read/write
 788  *
 789  *      Provide the procfs information for the 5380 controller. We fill
 790  *      this with useful debugging information including the commands
 791  *      being executed, disconnected command queue and the statistical
 792  *      data
 793  *
 794  *      Locks: global cli/lock for queue walk
 795  */
 796
 797 static int generic_NCR5380_show_info(struct seq_file *m, struct Scsi_Host *scsi_ptr)
 798 {
 799         NCR5380_local_declare();
 800         unsigned long flags;
 801         unsigned char status;
 802         int i;
 803         Scsi_Cmnd *ptr;
 804         struct NCR5380_hostdata *hostdata;
 805 #ifdef NCR5380_STATS
 806         struct scsi_device *dev;
 807 #endif
 808
 809         NCR5380_setup(scsi_ptr);
 810         hostdata = (struct NCR5380_hostdata *) scsi_ptr->hostdata;
 811
 812         spin_lock_irqsave(scsi_ptr->host_lock, flags);
 813         PRINTP("SCSI host number %d : %s\n" ANDP scsi_ptr->host_no ANDP scsi_ptr->hostt->name);
 814         PRINTP("Generic NCR5380 driver version %d\n" ANDP GENERIC_NCR5380_PUBLIC_RELEASE);
 815         PRINTP("NCR5380 core version %d\n" ANDP NCR5380_PUBLIC_RELEASE);
 816 #ifdef NCR53C400
 817         PRINTP("NCR53C400 extension version %d\n" ANDP NCR53C400_PUBLIC_RELEASE);
 818         PRINTP("NCR53C400 card%s detected\n" ANDP(((struct NCR5380_hostdata *) scsi_ptr->hostdata)->flags & FLAG_NCR53C400) ? "" : " not");
 819 # if NCR53C400_PSEUDO_DMA
 820         PRINTP("NCR53C400 pseudo DMA used\n");
 821 # endif
 822 #else
 823         PRINTP("NO NCR53C400 driver extensions\n");
 824 #endif
 825         PRINTP("Using %s mapping at %s 0x%lx, " ANDP STRVAL(NCR5380_map_config) ANDP STRVAL(NCR5380_map_name) ANDP scsi_ptr->NCR5380_instance_name);
 826         if (scsi_ptr->irq == SCSI_IRQ_NONE)
 827                 PRINTP("no interrupt\n");
 828         else
 829                 PRINTP("on interrupt %d\n" ANDP scsi_ptr->irq);
 830
 831 #ifdef NCR5380_STATS
 832         if (hostdata->connected || hostdata->issue_queue || hostdata->disconnected_queue)
 833                 PRINTP("There are commands pending, transfer rates may be crud\n");
 834         if (hostdata->pendingr)
 835                 PRINTP("  %d pending reads" ANDP hostdata->pendingr);
 836         if (hostdata->pendingw)
 837                 PRINTP("  %d pending writes" ANDP hostdata->pendingw);
 838         if (hostdata->pendingr || hostdata->pendingw)
 839                 PRINTP("\n");
 840         shost_for_each_device(dev, scsi_ptr) {
 841                 unsigned long br = hostdata->bytes_read[dev->id];
 842                 unsigned long bw = hostdata->bytes_write[dev->id];
 843                 long tr = hostdata->time_read[dev->id] / HZ;
 844                 long tw = hostdata->time_write[dev->id] / HZ;
 845
 846                 PRINTP("  T:%d %s " ANDP dev->id ANDP scsi_device_type(dev->type));
 847                 for (i = 0; i < 8; i++)
 848                         if (dev->vendor[i] >= 0x20)
 849                                 seq_putc(m, dev->vendor[i]);
 850                 seq_putc(m, ' ');
 851                 for (i = 0; i < 16; i++)
 852                         if (dev->model[i] >= 0x20)
 853                                 seq_putc(m, dev->model[i]);
 854                 seq_putc(m, ' ');
 855                 for (i = 0; i < 4; i++)
 856                         if (dev->rev[i] >= 0x20)
 857                                 seq_putc(m, dev->rev[i]);
 858                 seq_putc(m, ' ');
 859
 860                 PRINTP("\n%10ld kb read    in %5ld secs" ANDP br / 1024 ANDP tr);
 861                 if (tr)
 862                         PRINTP(" @ %5ld bps" ANDP br / tr);
 863
 864                 PRINTP("\n%10ld kb written in %5ld secs" ANDP bw / 1024 ANDP tw);
 865                 if (tw)
 866                         PRINTP(" @ %5ld bps" ANDP bw / tw);
 867                 PRINTP("\n");
 868         }
 869 #endif
 870
 871         status = NCR5380_read(STATUS_REG);
 872         if (!(status & SR_REQ))
 873                 PRINTP("REQ not asserted, phase unknown.\n");
 874         else {
 875                 for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i);
 876                 PRINTP("Phase %s\n" ANDP phases[i].name);
 877         }
 878
 879         if (!hostdata->connected) {
 880                 PRINTP("No currently connected command\n");
 881         } else {
 882                 sprint_Scsi_Cmnd(m, (Scsi_Cmnd *) hostdata->connected);
 883         }
 884
 885         PRINTP("issue_queue\n");
 886
 887         for (ptr = (Scsi_Cmnd *) hostdata->issue_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
 888                 sprint_Scsi_Cmnd(m, ptr);
 889
 890         PRINTP("disconnected_queue\n");
 891
 892         for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
 893                 sprint_Scsi_Cmnd(m, ptr);
 894
 895         spin_unlock_irqrestore(scsi_ptr->host_lock, flags);
 896         return 0;
 897 }
 898
 899 #undef PRINTP
 900 #undef ANDP
 901
 902 static struct scsi_host_template driver_template = {
 903         .show_info              = generic_NCR5380_show_info,
 904         .name                   = "Generic NCR5380/NCR53C400 Scsi Driver",
 905         .detect                 = generic_NCR5380_detect,
 906         .release                = generic_NCR5380_release_resources,
 907         .info                   = generic_NCR5380_info,
 908         .queuecommand           = generic_NCR5380_queue_command,
 909         .eh_abort_handler       = generic_NCR5380_abort,
 910         .eh_bus_reset_handler   = generic_NCR5380_bus_reset,
 911         .bios_param             = NCR5380_BIOSPARAM,
 912         .can_queue              = CAN_QUEUE,
 913         .this_id                = 7,
 914         .sg_tablesize           = SG_ALL,
 915         .cmd_per_lun            = CMD_PER_LUN,
 916         .use_clustering         = DISABLE_CLUSTERING,
 917 };
 918 #include <linux/module.h>
 919 #include "scsi_module.c"
 920
 921 module_param(ncr_irq, int, 0);
 922 module_param(ncr_dma, int, 0);
 923 module_param(ncr_addr, int, 0);
 924 module_param(ncr_5380, int, 0);
 925 module_param(ncr_53c400, int, 0);
 926 module_param(ncr_53c400a, int, 0);
 927 module_param(dtc_3181e, int, 0);
 928 MODULE_LICENSE("GPL");
 929
 930 #ifndef SCSI_G_NCR5380_MEM
 931 static struct isapnp_device_id id_table[] = {
 932         {
 933          ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 934          ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
 935          0},
 936         {0}
 937 };
 938
 939 MODULE_DEVICE_TABLE(isapnp, id_table);
 940 #endif
 941
 942 __setup("ncr5380=", do_NCR5380_setup);
 943 __setup("ncr53c400=", do_NCR53C400_setup);
 944 __setup("ncr53c400a=", do_NCR53C400A_setup);
 945 __setup("dtc3181e=", do_DTC3181E_setup);