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/system.h>
 104 #include <asm/io.h>
 105 #include <linux/signal.h>
 106 #include <linux/sched.h>
 107 #include <linux/blkdev.h>
 108 #include "scsi.h"
 109 #include <scsi/scsi_host.h>
 110 #include "g_NCR5380.h"
 111 #include "NCR5380.h"
 112 #include <linux/stat.h>
 113 #include <linux/init.h>
 114 #include <linux/ioport.h>
 115 #include <linux/isapnp.h>
 116 #include <linux/delay.h>
 117 #include <linux/interrupt.h>
 118
 119 #define NCR_NOT_SET 0
 120 static int ncr_irq = NCR_NOT_SET;
 121 static int ncr_dma = NCR_NOT_SET;
 122 static int ncr_addr = NCR_NOT_SET;
 123 static int ncr_5380 = NCR_NOT_SET;
 124 static int ncr_53c400 = NCR_NOT_SET;
 125 static int ncr_53c400a = NCR_NOT_SET;
 126 static int dtc_3181e = NCR_NOT_SET;
 127
 128 static struct override {
 129         NCR5380_map_type NCR5380_map_name;
 130         int irq;
 131         int dma;
 132         int board;              /* Use NCR53c400, Ricoh, etc. extensions ? */
 133 } overrides
 134 #ifdef GENERIC_NCR5380_OVERRIDE
 135 [] __initdata = GENERIC_NCR5380_OVERRIDE;
 136 #else
 137 [1] __initdata = { { 0,},};
 138 #endif
 139
 140 #define NO_OVERRIDES ARRAY_SIZE(overrides)
 141
 142 #ifndef MODULE
 143
 144 /**
 145  *      internal_setup          -       handle lilo command string override
 146  *      @board: BOARD_* identifier for the board
 147  *      @str: unused
 148  *      @ints: numeric parameters
 149  *
 150  *      Do LILO command line initialization of the overrides array. Display
 151  *      errors when needed
 152  *
 153  *      Locks: none
 154  */
 155
 156 static void __init internal_setup(int board, char *str, int *ints)
 157 {
 158         static int commandline_current = 0;
 159         switch (board) {
 160         case BOARD_NCR5380:
 161                 if (ints[0] != 2 && ints[0] != 3) {
 162                         printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
 163                         return;
 164                 }
 165                 break;
 166         case BOARD_NCR53C400:
 167                 if (ints[0] != 2) {
 168                         printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
 169                         return;
 170                 }
 171                 break;
 172         case BOARD_NCR53C400A:
 173                 if (ints[0] != 2) {
 174                         printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
 175                         return;
 176                 }
 177                 break;
 178         case BOARD_DTC3181E:
 179                 if (ints[0] != 2) {
 180                         printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
 181                         return;
 182                 }
 183                 break;
 184         }
 185
 186         if (commandline_current < NO_OVERRIDES) {
 187                 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
 188                 overrides[commandline_current].irq = ints[2];
 189                 if (ints[0] == 3)
 190                         overrides[commandline_current].dma = ints[3];
 191                 else
 192                         overrides[commandline_current].dma = DMA_NONE;
 193                 overrides[commandline_current].board = board;
 194                 ++commandline_current;
 195         }
 196 }
 197
 198
 199 /**
 200  *      do_NCR53C80_setup               -       set up entry point
 201  *      @str: unused
 202  *
 203  *      Setup function invoked at boot to parse the ncr5380= command
 204  *      line.
 205  */
 206
 207 static int __init do_NCR5380_setup(char *str)
 208 {
 209         int ints[10];
 210
 211         get_options(str, ARRAY_SIZE(ints), ints);
 212         internal_setup(BOARD_NCR5380, str, ints);
 213         return 1;
 214 }
 215
 216 /**
 217  *      do_NCR53C400_setup              -       set up entry point
 218  *      @str: unused
 219  *      @ints: integer parameters from kernel setup code
 220  *
 221  *      Setup function invoked at boot to parse the ncr53c400= command
 222  *      line.
 223  */
 224
 225 static int __init do_NCR53C400_setup(char *str)
 226 {
 227         int ints[10];
 228
 229         get_options(str, ARRAY_SIZE(ints), ints);
 230         internal_setup(BOARD_NCR53C400, str, ints);
 231         return 1;
 232 }
 233
 234 /**
 235  *      do_NCR53C400A_setup     -       set up entry point
 236  *      @str: unused
 237  *      @ints: integer parameters from kernel setup code
 238  *
 239  *      Setup function invoked at boot to parse the ncr53c400a= command
 240  *      line.
 241  */
 242
 243 static int __init do_NCR53C400A_setup(char *str)
 244 {
 245         int ints[10];
 246
 247         get_options(str, ARRAY_SIZE(ints), ints);
 248         internal_setup(BOARD_NCR53C400A, str, ints);
 249         return 1;
 250 }
 251
 252 /**
 253  *      do_DTC3181E_setup       -       set up entry point
 254  *      @str: unused
 255  *      @ints: integer parameters from kernel setup code
 256  *
 257  *      Setup function invoked at boot to parse the dtc3181e= command
 258  *      line.
 259  */
 260
 261 static int __init do_DTC3181E_setup(char *str)
 262 {
 263         int ints[10];
 264
 265         get_options(str, ARRAY_SIZE(ints), ints);
 266         internal_setup(BOARD_DTC3181E, str, ints);
 267         return 1;
 268 }
 269
 270 #endif
 271
 272 /**
 273  *      generic_NCR5380_detect  -       look for NCR5380 controllers
 274  *      @tpnt: the scsi template
 275  *
 276  *      Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
 277  *      and DTC436(ISAPnP) controllers. If overrides have been set we use
 278  *      them.
 279  *
 280  *      The caller supplied NCR5380_init function is invoked from here, before
 281  *      the interrupt line is taken.
 282  *
 283  *      Locks: none
 284  */
 285
 286 int __init generic_NCR5380_detect(struct scsi_host_template * tpnt)
 287 {
 288         static int current_override = 0;
 289         int count, i;
 290         unsigned int *ports;
 291         unsigned long region_size = 16;
 292         static unsigned int __initdata ncr_53c400a_ports[] = {
 293                 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
 294         };
 295         static unsigned int __initdata dtc_3181e_ports[] = {
 296                 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
 297         };
 298         int flags = 0;
 299         struct Scsi_Host *instance;
 300 #ifdef CONFIG_SCSI_G_NCR5380_MEM
 301         unsigned long base;
 302         void __iomem *iomem;
 303 #endif
 304
 305         if (ncr_irq != NCR_NOT_SET)
 306                 overrides[0].irq = ncr_irq;
 307         if (ncr_dma != NCR_NOT_SET)
 308                 overrides[0].dma = ncr_dma;
 309         if (ncr_addr != NCR_NOT_SET)
 310                 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
 311         if (ncr_5380 != NCR_NOT_SET)
 312                 overrides[0].board = BOARD_NCR5380;
 313         else if (ncr_53c400 != NCR_NOT_SET)
 314                 overrides[0].board = BOARD_NCR53C400;
 315         else if (ncr_53c400a != NCR_NOT_SET)
 316                 overrides[0].board = BOARD_NCR53C400A;
 317         else if (dtc_3181e != NCR_NOT_SET)
 318                 overrides[0].board = BOARD_DTC3181E;
 319
 320         if (!current_override && isapnp_present()) {
 321                 struct pnp_dev *dev = NULL;
 322                 count = 0;
 323                 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
 324                         if (count >= NO_OVERRIDES)
 325                                 break;
 326                         if (pnp_device_attach(dev) < 0) {
 327                                 printk(KERN_ERR "dtc436e probe: attach failed\n");
 328                                 continue;
 329                         }
 330                         if (pnp_activate_dev(dev) < 0) {
 331                                 printk(KERN_ERR "dtc436e probe: activate failed\n");
 332                                 pnp_device_detach(dev);
 333                                 continue;
 334                         }
 335                         if (!pnp_port_valid(dev, 0)) {
 336                                 printk(KERN_ERR "dtc436e probe: no valid port\n");
 337                                 pnp_device_detach(dev);
 338                                 continue;
 339                         }
 340                         if (pnp_irq_valid(dev, 0))
 341                                 overrides[count].irq = pnp_irq(dev, 0);
 342                         else
 343                                 overrides[count].irq = SCSI_IRQ_NONE;
 344                         if (pnp_dma_valid(dev, 0))
 345                                 overrides[count].dma = pnp_dma(dev, 0);
 346                         else
 347                                 overrides[count].dma = DMA_NONE;
 348                         overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
 349                         overrides[count].board = BOARD_DTC3181E;
 350                         count++;
 351                 }
 352         }
 353
 354         tpnt->proc_name = "g_NCR5380";
 355
 356         for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
 357                 if (!(overrides[current_override].NCR5380_map_name))
 358                         continue;
 359
 360                 ports = NULL;
 361                 switch (overrides[current_override].board) {
 362                 case BOARD_NCR5380:
 363                         flags = FLAG_NO_PSEUDO_DMA;
 364                         break;
 365                 case BOARD_NCR53C400:
 366                         flags = FLAG_NCR53C400;
 367                         break;
 368                 case BOARD_NCR53C400A:
 369                         flags = FLAG_NO_PSEUDO_DMA;
 370                         ports = ncr_53c400a_ports;
 371                         break;
 372                 case BOARD_DTC3181E:
 373                         flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
 374                         ports = dtc_3181e_ports;
 375                         break;
 376                 }
 377
 378 #ifndef CONFIG_SCSI_G_NCR5380_MEM
 379                 if (ports) {
 380                         /* wakeup sequence for the NCR53C400A and DTC3181E */
 381
 382                         /* Disable the adapter and look for a free io port */
 383                         outb(0x59, 0x779);
 384                         outb(0xb9, 0x379);
 385                         outb(0xc5, 0x379);
 386                         outb(0xae, 0x379);
 387                         outb(0xa6, 0x379);
 388                         outb(0x00, 0x379);
 389
 390                         if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
 391                                 for (i = 0; ports[i]; i++) {
 392                                         if (!request_region(ports[i],  16, "ncr53c80"))
 393                                                 continue;
 394                                         if (overrides[current_override].NCR5380_map_name == ports[i])
 395                                                 break;
 396                                         release_region(ports[i], 16);
 397                         } else
 398                                 for (i = 0; ports[i]; i++) {
 399                                         if (!request_region(ports[i],  16, "ncr53c80"))
 400                                                 continue;
 401                                         if (inb(ports[i]) == 0xff)
 402                                                 break;
 403                                         release_region(ports[i], 16);
 404                                 }
 405                         if (ports[i]) {
 406                                 /* At this point we have our region reserved */
 407                                 outb(0x59, 0x779);
 408                                 outb(0xb9, 0x379);
 409                                 outb(0xc5, 0x379);
 410                                 outb(0xae, 0x379);
 411                                 outb(0xa6, 0x379);
 412                                 outb(0x80 | i, 0x379);  /* set io port to be used */
 413                                 outb(0xc0, ports[i] + 9);
 414                                 if (inb(ports[i] + 9) != 0x80)
 415                                         continue;
 416                                 else
 417                                         overrides[current_override].NCR5380_map_name = ports[i];
 418                         } else
 419                                 continue;
 420                 }
 421                 else
 422                 {
 423                         /* Not a 53C400A style setup - just grab */
 424                         if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
 425                                 continue;
 426                         region_size = NCR5380_region_size;
 427                 }
 428 #else
 429                 base = overrides[current_override].NCR5380_map_name;
 430                 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
 431                         continue;
 432                 iomem = ioremap(base, NCR5380_region_size);
 433                 if (!iomem) {
 434                         release_mem_region(base, NCR5380_region_size);
 435                         continue;
 436                 }
 437 #endif
 438                 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
 439                 if (instance == NULL) {
 440 #ifndef CONFIG_SCSI_G_NCR5380_MEM
 441                         release_region(overrides[current_override].NCR5380_map_name, region_size);
 442 #else
 443                         iounmap(iomem);
 444                         release_mem_region(base, NCR5380_region_size);
 445 #endif
 446                         continue;
 447                 }
 448
 449                 instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name;
 450 #ifndef CONFIG_SCSI_G_NCR5380_MEM
 451                 instance->n_io_port = region_size;
 452 #else
 453                 ((struct NCR5380_hostdata *)instance->hostdata).iomem = iomem;
 454 #endif
 455
 456                 NCR5380_init(instance, flags);
 457
 458                 if (overrides[current_override].irq != IRQ_AUTO)
 459                         instance->irq = overrides[current_override].irq;
 460                 else
 461                         instance->irq = NCR5380_probe_irq(instance, 0xffff);
 462
 463                 if (instance->irq != SCSI_IRQ_NONE)
 464                         if (request_irq(instance->irq, generic_NCR5380_intr, 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, NULL);
 518         NCR5380_exit(instance);
 519
 520 #ifndef CONFIG_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 #if 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 psuedo 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 CONFIG_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 CONFIG_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 CONFIG_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 CONFIG_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 psuedo 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 CONFIG_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 CONFIG_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 CONFIG_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 CONFIG_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) len += sprintf(buffer+len, x)
 749 #define ANDP ,
 750
 751 static int sprint_opcode(char *buffer, int len, int opcode)
 752 {
 753         int start = len;
 754         PRINTP("0x%02x " ANDP opcode);
 755         return len - start;
 756 }
 757
 758 static int sprint_command(char *buffer, int len, unsigned char *command)
 759 {
 760         int i, s, start = len;
 761         len += sprint_opcode(buffer, len, command[0]);
 762         for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
 763                 PRINTP("%02x " ANDP command[i]);
 764         PRINTP("\n");
 765         return len - start;
 766 }
 767
 768 /**
 769  *      sprintf_Scsi_Cmnd       -       print a scsi command
 770  *      @buffer: buffr to print into
 771  *      @len: buffer length
 772  *      @cmd: SCSI command block
 773  *
 774  *      Print out the target and command data in hex
 775  */
 776
 777 static int sprint_Scsi_Cmnd(char *buffer, int len, Scsi_Cmnd * cmd)
 778 {
 779         int start = len;
 780         PRINTP("host number %d destination target %d, lun %d\n" ANDP cmd->device->host->host_no ANDP cmd->device->id ANDP cmd->device->lun);
 781         PRINTP("        command = ");
 782         len += sprint_command(buffer, len, cmd->cmnd);
 783         return len - start;
 784 }
 785
 786 /**
 787  *      generic_NCR5380_proc_info       -       /proc for NCR5380 driver
 788  *      @buffer: buffer to print into
 789  *      @start: start position
 790  *      @offset: offset into buffer
 791  *      @len: length
 792  *      @hostno: instance to affect
 793  *      @inout: read/write
 794  *
 795  *      Provide the procfs information for the 5380 controller. We fill
 796  *      this with useful debugging information including the commands
 797  *      being executed, disconnected command queue and the statistical
 798  *      data
 799  *
 800  *      Locks: global cli/lock for queue walk
 801  */
 802
 803 static int generic_NCR5380_proc_info(struct Scsi_Host *scsi_ptr, char *buffer, char **start, off_t offset, int length, int inout)
 804 {
 805         int len = 0;
 806         NCR5380_local_declare();
 807         unsigned long flags;
 808         unsigned char status;
 809         int i;
 810         Scsi_Cmnd *ptr;
 811         struct NCR5380_hostdata *hostdata;
 812 #ifdef NCR5380_STATS
 813         struct scsi_device *dev;
 814         extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE];
 815 #endif
 816
 817         NCR5380_setup(scsi_ptr);
 818         hostdata = (struct NCR5380_hostdata *) scsi_ptr->hostdata;
 819
 820         spin_lock_irqsave(scsi_ptr->host_lock, flags);
 821         PRINTP("SCSI host number %d : %s\n" ANDP scsi_ptr->host_no ANDP scsi_ptr->hostt->name);
 822         PRINTP("Generic NCR5380 driver version %d\n" ANDP GENERIC_NCR5380_PUBLIC_RELEASE);
 823         PRINTP("NCR5380 core version %d\n" ANDP NCR5380_PUBLIC_RELEASE);
 824 #ifdef NCR53C400
 825         PRINTP("NCR53C400 extension version %d\n" ANDP NCR53C400_PUBLIC_RELEASE);
 826         PRINTP("NCR53C400 card%s detected\n" ANDP(((struct NCR5380_hostdata *) scsi_ptr->hostdata)->flags & FLAG_NCR53C400) ? "" : " not");
 827 # if NCR53C400_PSEUDO_DMA
 828         PRINTP("NCR53C400 pseudo DMA used\n");
 829 # endif
 830 #else
 831         PRINTP("NO NCR53C400 driver extensions\n");
 832 #endif
 833         PRINTP("Using %s mapping at %s 0x%lx, " ANDP STRVAL(NCR5380_map_config) ANDP STRVAL(NCR5380_map_name) ANDP scsi_ptr->NCR5380_instance_name);
 834         if (scsi_ptr->irq == SCSI_IRQ_NONE)
 835                 PRINTP("no interrupt\n");
 836         else
 837                 PRINTP("on interrupt %d\n" ANDP scsi_ptr->irq);
 838
 839 #ifdef NCR5380_STATS
 840         if (hostdata->connected || hostdata->issue_queue || hostdata->disconnected_queue)
 841                 PRINTP("There are commands pending, transfer rates may be crud\n");
 842         if (hostdata->pendingr)
 843                 PRINTP("  %d pending reads" ANDP hostdata->pendingr);
 844         if (hostdata->pendingw)
 845                 PRINTP("  %d pending writes" ANDP hostdata->pendingw);
 846         if (hostdata->pendingr || hostdata->pendingw)
 847                 PRINTP("\n");
 848         shost_for_each_device(dev, scsi_ptr) {
 849                 unsigned long br = hostdata->bytes_read[dev->id];
 850                 unsigned long bw = hostdata->bytes_write[dev->id];
 851                 long tr = hostdata->time_read[dev->id] / HZ;
 852                 long tw = hostdata->time_write[dev->id] / HZ;
 853
 854                 PRINTP("  T:%d %s " ANDP dev->id ANDP(dev->type < MAX_SCSI_DEVICE_CODE) ? scsi_device_types[(int) dev->type] : "Unknown");
 855                 for (i = 0; i < 8; i++)
 856                         if (dev->vendor[i] >= 0x20)
 857                                 *(buffer + (len++)) = dev->vendor[i];
 858                 *(buffer + (len++)) = ' ';
 859                 for (i = 0; i < 16; i++)
 860                         if (dev->model[i] >= 0x20)
 861                                 *(buffer + (len++)) = dev->model[i];
 862                 *(buffer + (len++)) = ' ';
 863                 for (i = 0; i < 4; i++)
 864                         if (dev->rev[i] >= 0x20)
 865                                 *(buffer + (len++)) = dev->rev[i];
 866                 *(buffer + (len++)) = ' ';
 867
 868                 PRINTP("\n%10ld kb read    in %5ld secs" ANDP br / 1024 ANDP tr);
 869                 if (tr)
 870                         PRINTP(" @ %5ld bps" ANDP br / tr);
 871
 872                 PRINTP("\n%10ld kb written in %5ld secs" ANDP bw / 1024 ANDP tw);
 873                 if (tw)
 874                         PRINTP(" @ %5ld bps" ANDP bw / tw);
 875                 PRINTP("\n");
 876         }
 877 #endif
 878
 879         status = NCR5380_read(STATUS_REG);
 880         if (!(status & SR_REQ))
 881                 PRINTP("REQ not asserted, phase unknown.\n");
 882         else {
 883                 for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i);
 884                 PRINTP("Phase %s\n" ANDP phases[i].name);
 885         }
 886
 887         if (!hostdata->connected) {
 888                 PRINTP("No currently connected command\n");
 889         } else {
 890                 len += sprint_Scsi_Cmnd(buffer, len, (Scsi_Cmnd *) hostdata->connected);
 891         }
 892
 893         PRINTP("issue_queue\n");
 894
 895         for (ptr = (Scsi_Cmnd *) hostdata->issue_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
 896                 len += sprint_Scsi_Cmnd(buffer, len, ptr);
 897
 898         PRINTP("disconnected_queue\n");
 899
 900         for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
 901                 len += sprint_Scsi_Cmnd(buffer, len, ptr);
 902
 903         *start = buffer + offset;
 904         len -= offset;
 905         if (len > length)
 906                 len = length;
 907         spin_unlock_irqrestore(scsi_ptr->host_lock, flags);
 908         return len;
 909 }
 910
 911 #undef PRINTP
 912 #undef ANDP
 913
 914 static struct scsi_host_template driver_template = {
 915         .proc_info              = generic_NCR5380_proc_info,
 916         .name                   = "Generic NCR5380/NCR53C400 Scsi Driver",
 917         .detect                 = generic_NCR5380_detect,
 918         .release                = generic_NCR5380_release_resources,
 919         .info                   = generic_NCR5380_info,
 920         .queuecommand           = generic_NCR5380_queue_command,
 921         .eh_abort_handler       = generic_NCR5380_abort,
 922         .eh_bus_reset_handler   = generic_NCR5380_bus_reset,
 923         .bios_param             = NCR5380_BIOSPARAM,
 924         .can_queue              = CAN_QUEUE,
 925         .this_id                = 7,
 926         .sg_tablesize           = SG_ALL,
 927         .cmd_per_lun            = CMD_PER_LUN,
 928         .use_clustering         = DISABLE_CLUSTERING,
 929 };
 930 #include <linux/module.h>
 931 #include "scsi_module.c"
 932
 933 module_param(ncr_irq, int, 0);
 934 module_param(ncr_dma, int, 0);
 935 module_param(ncr_addr, int, 0);
 936 module_param(ncr_5380, int, 0);
 937 module_param(ncr_53c400, int, 0);
 938 module_param(ncr_53c400a, int, 0);
 939 module_param(dtc_3181e, int, 0);
 940 MODULE_LICENSE("GPL");
 941
 942
 943 static struct isapnp_device_id id_table[] __devinitdata = {
 944         {
 945          ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 946          ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
 947          0},
 948         {0}
 949 };
 950
 951 MODULE_DEVICE_TABLE(isapnp, id_table);
 952
 953
 954 __setup("ncr5380=", do_NCR5380_setup);
 955 __setup("ncr53c400=", do_NCR53C400_setup);
 956 __setup("ncr53c400a=", do_NCR53C400A_setup);
 957 __setup("dtc3181e=", do_DTC3181E_setup);