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/blkdev.h>
 107 #include "scsi.h"
 108 #include <scsi/scsi_host.h>
 109 #include "g_NCR5380.h"
 110 #include "NCR5380.h"
 111 #include <linux/stat.h>
 112 #include <linux/init.h>
 113 #include <linux/ioport.h>
 114 #include <linux/isapnp.h>
 115 #include <linux/delay.h>
 116 #include <linux/interrupt.h>
 117
 118 #define NCR_NOT_SET 0
 119 static int ncr_irq = NCR_NOT_SET;
 120 static int ncr_dma = NCR_NOT_SET;
 121 static int ncr_addr = NCR_NOT_SET;
 122 static int ncr_5380 = NCR_NOT_SET;
 123 static int ncr_53c400 = NCR_NOT_SET;
 124 static int ncr_53c400a = NCR_NOT_SET;
 125 static int dtc_3181e = NCR_NOT_SET;
 126
 127 static struct override {
 128         NCR5380_map_type NCR5380_map_name;
 129         int irq;
 130         int dma;
 131         int board;              /* Use NCR53c400, Ricoh, etc. extensions ? */
 132 } overrides
 133 #ifdef GENERIC_NCR5380_OVERRIDE
 134 [] __initdata = GENERIC_NCR5380_OVERRIDE;
 135 #else
 136 [1] __initdata = { { 0,},};
 137 #endif
 138
 139 #define NO_OVERRIDES ARRAY_SIZE(overrides)
 140
 141 #ifndef MODULE
 142
 143 /**
 144  *      internal_setup          -       handle lilo command string override
 145  *      @board: BOARD_* identifier for the board
 146  *      @str: unused
 147  *      @ints: numeric parameters
 148  *
 149  *      Do LILO command line initialization of the overrides array. Display
 150  *      errors when needed
 151  *
 152  *      Locks: none
 153  */
 154
 155 static void __init internal_setup(int board, char *str, int *ints)
 156 {
 157         static int commandline_current = 0;
 158         switch (board) {
 159         case BOARD_NCR5380:
 160                 if (ints[0] != 2 && ints[0] != 3) {
 161                         printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
 162                         return;
 163                 }
 164                 break;
 165         case BOARD_NCR53C400:
 166                 if (ints[0] != 2) {
 167                         printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
 168                         return;
 169                 }
 170                 break;
 171         case BOARD_NCR53C400A:
 172                 if (ints[0] != 2) {
 173                         printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
 174                         return;
 175                 }
 176                 break;
 177         case BOARD_DTC3181E:
 178                 if (ints[0] != 2) {
 179                         printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
 180                         return;
 181                 }
 182                 break;
 183         }
 184
 185         if (commandline_current < NO_OVERRIDES) {
 186                 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
 187                 overrides[commandline_current].irq = ints[2];
 188                 if (ints[0] == 3)
 189                         overrides[commandline_current].dma = ints[3];
 190                 else
 191                         overrides[commandline_current].dma = DMA_NONE;
 192                 overrides[commandline_current].board = board;
 193                 ++commandline_current;
 194         }
 195 }
 196
 197
 198 /**
 199  *      do_NCR53C80_setup               -       set up entry point
 200  *      @str: unused
 201  *
 202  *      Setup function invoked at boot to parse the ncr5380= command
 203  *      line.
 204  */
 205
 206 static int __init do_NCR5380_setup(char *str)
 207 {
 208         int ints[10];
 209
 210         get_options(str, ARRAY_SIZE(ints), ints);
 211         internal_setup(BOARD_NCR5380, str, ints);
 212         return 1;
 213 }
 214
 215 /**
 216  *      do_NCR53C400_setup              -       set up entry point
 217  *      @str: unused
 218  *      @ints: integer parameters from kernel setup code
 219  *
 220  *      Setup function invoked at boot to parse the ncr53c400= command
 221  *      line.
 222  */
 223
 224 static int __init do_NCR53C400_setup(char *str)
 225 {
 226         int ints[10];
 227
 228         get_options(str, ARRAY_SIZE(ints), ints);
 229         internal_setup(BOARD_NCR53C400, str, ints);
 230         return 1;
 231 }
 232
 233 /**
 234  *      do_NCR53C400A_setup     -       set up entry point
 235  *      @str: unused
 236  *      @ints: integer parameters from kernel setup code
 237  *
 238  *      Setup function invoked at boot to parse the ncr53c400a= command
 239  *      line.
 240  */
 241
 242 static int __init do_NCR53C400A_setup(char *str)
 243 {
 244         int ints[10];
 245
 246         get_options(str, ARRAY_SIZE(ints), ints);
 247         internal_setup(BOARD_NCR53C400A, str, ints);
 248         return 1;
 249 }
 250
 251 /**
 252  *      do_DTC3181E_setup       -       set up entry point
 253  *      @str: unused
 254  *      @ints: integer parameters from kernel setup code
 255  *
 256  *      Setup function invoked at boot to parse the dtc3181e= command
 257  *      line.
 258  */
 259
 260 static int __init do_DTC3181E_setup(char *str)
 261 {
 262         int ints[10];
 263
 264         get_options(str, ARRAY_SIZE(ints), ints);
 265         internal_setup(BOARD_DTC3181E, str, ints);
 266         return 1;
 267 }
 268
 269 #endif
 270
 271 /**
 272  *      generic_NCR5380_detect  -       look for NCR5380 controllers
 273  *      @tpnt: the scsi template
 274  *
 275  *      Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
 276  *      and DTC436(ISAPnP) controllers. If overrides have been set we use
 277  *      them.
 278  *
 279  *      The caller supplied NCR5380_init function is invoked from here, before
 280  *      the interrupt line is taken.
 281  *
 282  *      Locks: none
 283  */
 284
 285 int __init generic_NCR5380_detect(struct scsi_host_template * tpnt)
 286 {
 287         static int current_override = 0;
 288         int count;
 289         unsigned int *ports;
 290 #ifndef SCSI_G_NCR5380_MEM
 291         int i;
 292         unsigned long region_size = 16;
 293 #endif
 294         static unsigned int __initdata ncr_53c400a_ports[] = {
 295                 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
 296         };
 297         static unsigned int __initdata dtc_3181e_ports[] = {
 298                 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
 299         };
 300         int flags = 0;
 301         struct Scsi_Host *instance;
 302 #ifdef SCSI_G_NCR5380_MEM
 303         unsigned long base;
 304         void __iomem *iomem;
 305 #endif
 306
 307         if (ncr_irq != NCR_NOT_SET)
 308                 overrides[0].irq = ncr_irq;
 309         if (ncr_dma != NCR_NOT_SET)
 310                 overrides[0].dma = ncr_dma;
 311         if (ncr_addr != NCR_NOT_SET)
 312                 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
 313         if (ncr_5380 != NCR_NOT_SET)
 314                 overrides[0].board = BOARD_NCR5380;
 315         else if (ncr_53c400 != NCR_NOT_SET)
 316                 overrides[0].board = BOARD_NCR53C400;
 317         else if (ncr_53c400a != NCR_NOT_SET)
 318                 overrides[0].board = BOARD_NCR53C400A;
 319         else if (dtc_3181e != NCR_NOT_SET)
 320                 overrides[0].board = BOARD_DTC3181E;
 321 #ifndef SCSI_G_NCR5380_MEM
 322         if (!current_override && isapnp_present()) {
 323                 struct pnp_dev *dev = NULL;
 324                 count = 0;
 325                 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
 326                         if (count >= NO_OVERRIDES)
 327                                 break;
 328                         if (pnp_device_attach(dev) < 0)
 329                                 continue;
 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 #endif
 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 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 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 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,
 465                                         IRQF_DISABLED, "NCR5380", instance)) {
 466                                 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
 467                                 instance->irq = SCSI_IRQ_NONE;
 468                         }
 469
 470                 if (instance->irq == SCSI_IRQ_NONE) {
 471                         printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
 472                         printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
 473                 }
 474
 475                 printk(KERN_INFO "scsi%d : at " STRVAL(NCR5380_map_name) " 0x%x", instance->host_no, (unsigned int) instance->NCR5380_instance_name);
 476                 if (instance->irq == SCSI_IRQ_NONE)
 477                         printk(" interrupts disabled");
 478                 else
 479                         printk(" irq %d", instance->irq);
 480                 printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d", CAN_QUEUE, CMD_PER_LUN, GENERIC_NCR5380_PUBLIC_RELEASE);
 481                 NCR5380_print_options(instance);
 482                 printk("\n");
 483
 484                 ++current_override;
 485                 ++count;
 486         }
 487         return count;
 488 }
 489
 490 /**
 491  *      generic_NCR5380_info    -       reporting string
 492  *      @host: NCR5380 to report on
 493  *
 494  *      Report driver information for the NCR5380
 495  */
 496
 497 const char *generic_NCR5380_info(struct Scsi_Host *host)
 498 {
 499         static const char string[] = "Generic NCR5380/53C400 Driver";
 500         return string;
 501 }
 502
 503 /**
 504  *      generic_NCR5380_release_resources       -       free resources
 505  *      @instance: host adapter to clean up
 506  *
 507  *      Free the generic interface resources from this adapter.
 508  *
 509  *      Locks: none
 510  */
 511
 512 int generic_NCR5380_release_resources(struct Scsi_Host *instance)
 513 {
 514         NCR5380_local_declare();
 515         NCR5380_setup(instance);
 516
 517         if (instance->irq != SCSI_IRQ_NONE)
 518                 free_irq(instance->irq, instance);
 519         NCR5380_exit(instance);
 520
 521 #ifndef SCSI_G_NCR5380_MEM
 522         release_region(instance->NCR5380_instance_name, instance->n_io_port);
 523 #else
 524         iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
 525         release_mem_region(instance->NCR5380_instance_name, NCR5380_region_size);
 526 #endif
 527
 528
 529         return 0;
 530 }
 531
 532 #ifdef BIOSPARAM
 533 /**
 534  *      generic_NCR5380_biosparam
 535  *      @disk: disk to compute geometry for
 536  *      @dev: device identifier for this disk
 537  *      @ip: sizes to fill in
 538  *
 539  *      Generates a BIOS / DOS compatible H-C-S mapping for the specified
 540  *      device / size.
 541  *
 542  *      XXX Most SCSI boards use this mapping, I could be incorrect.  Someone
 543  *      using hard disks on a trantor should verify that this mapping
 544  *      corresponds to that used by the BIOS / ASPI driver by running the linux
 545  *      fdisk program and matching the H_C_S coordinates to what DOS uses.
 546  *
 547  *      Locks: none
 548  */
 549
 550 static int
 551 generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 552                           sector_t capacity, int *ip)
 553 {
 554         ip[0] = 64;
 555         ip[1] = 32;
 556         ip[2] = capacity >> 11;
 557         return 0;
 558 }
 559 #endif
 560
 561 #ifdef NCR53C400_PSEUDO_DMA
 562
 563 /**
 564  *      NCR5380_pread           -       pseudo DMA read
 565  *      @instance: adapter to read from
 566  *      @dst: buffer to read into
 567  *      @len: buffer length
 568  *
 569  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 570  *      controller
 571  */
 572
 573 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
 574 {
 575         int blocks = len / 128;
 576         int start = 0;
 577         int bl;
 578
 579         NCR5380_local_declare();
 580         NCR5380_setup(instance);
 581
 582         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
 583         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 584         while (1) {
 585                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 586                         break;
 587                 }
 588                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 589                         printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 590                         return -1;
 591                 }
 592                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);
 593
 594 #ifndef SCSI_G_NCR5380_MEM
 595                 {
 596                         int i;
 597                         for (i = 0; i < 128; i++)
 598                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 599                 }
 600 #else
 601                 /* implies SCSI_G_NCR5380_MEM */
 602                 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
 603 #endif
 604                 start += 128;
 605                 blocks--;
 606         }
 607
 608         if (blocks) {
 609                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 610                 {
 611                         // FIXME - no timeout
 612                 }
 613
 614 #ifndef SCSI_G_NCR5380_MEM
 615                 {
 616                         int i;
 617                         for (i = 0; i < 128; i++)
 618                                 dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
 619                 }
 620 #else
 621                 /* implies SCSI_G_NCR5380_MEM */
 622                 memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
 623 #endif
 624                 start += 128;
 625                 blocks--;
 626         }
 627
 628         if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 629                 printk("53C400r: no 53C80 gated irq after transfer");
 630
 631 #if 0
 632         /*
 633          *      DON'T DO THIS - THEY NEVER ARRIVE!
 634          */
 635         printk("53C400r: Waiting for 53C80 registers\n");
 636         while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
 637                 ;
 638 #endif
 639         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
 640                 printk(KERN_ERR "53C400r: no end dma signal\n");
 641
 642         NCR5380_write(MODE_REG, MR_BASE);
 643         NCR5380_read(RESET_PARITY_INTERRUPT_REG);
 644         return 0;
 645 }
 646
 647 /**
 648  *      NCR5380_write           -       pseudo DMA write
 649  *      @instance: adapter to read from
 650  *      @dst: buffer to read into
 651  *      @len: buffer length
 652  *
 653  *      Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 654  *      controller
 655  */
 656
 657 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
 658 {
 659         int blocks = len / 128;
 660         int start = 0;
 661         int bl;
 662         int i;
 663
 664         NCR5380_local_declare();
 665         NCR5380_setup(instance);
 666
 667         NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
 668         NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
 669         while (1) {
 670                 if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
 671                         printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
 672                         return -1;
 673                 }
 674
 675                 if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
 676                         break;
 677                 }
 678                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 679                         ; // FIXME - timeout
 680 #ifndef SCSI_G_NCR5380_MEM
 681                 {
 682                         for (i = 0; i < 128; i++)
 683                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 684                 }
 685 #else
 686                 /* implies SCSI_G_NCR5380_MEM */
 687                 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
 688 #endif
 689                 start += 128;
 690                 blocks--;
 691         }
 692         if (blocks) {
 693                 while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
 694                         ; // FIXME - no timeout
 695
 696 #ifndef SCSI_G_NCR5380_MEM
 697                 {
 698                         for (i = 0; i < 128; i++)
 699                                 NCR5380_write(C400_HOST_BUFFER, src[start + i]);
 700                 }
 701 #else
 702                 /* implies SCSI_G_NCR5380_MEM */
 703                 memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
 704 #endif
 705                 start += 128;
 706                 blocks--;
 707         }
 708
 709 #if 0
 710         printk("53C400w: waiting for registers to be available\n");
 711         THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
 712         printk("53C400w: Got em\n");
 713 #endif
 714
 715         /* Let's wait for this instead - could be ugly */
 716         /* All documentation says to check for this. Maybe my hardware is too
 717          * fast. Waiting for it seems to work fine! KLL
 718          */
 719         while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
 720                 ;       // FIXME - no timeout
 721
 722         /*
 723          * I know. i is certainly != 0 here but the loop is new. See previous
 724          * comment.
 725          */
 726         if (i) {
 727                 if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
 728                         printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
 729         } else
 730                 printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");
 731
 732 #if 0
 733         if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
 734                 printk(KERN_ERR "53C400w: no end dma signal\n");
 735         }
 736 #endif
 737         while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
 738                 ;       // TIMEOUT
 739         return 0;
 740 }
 741 #endif                          /* PSEUDO_DMA */
 742
 743 /*
 744  *      Include the NCR5380 core code that we build our driver around
 745  */
 746
 747 #include "NCR5380.c"
 748
 749 #define PRINTP(x) len += sprintf(buffer+len, x)
 750 #define ANDP ,
 751
 752 static int sprint_opcode(char *buffer, int len, int opcode)
 753 {
 754         int start = len;
 755         PRINTP("0x%02x " ANDP opcode);
 756         return len - start;
 757 }
 758
 759 static int sprint_command(char *buffer, int len, unsigned char *command)
 760 {
 761         int i, s, start = len;
 762         len += sprint_opcode(buffer, len, command[0]);
 763         for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
 764                 PRINTP("%02x " ANDP command[i]);
 765         PRINTP("\n");
 766         return len - start;
 767 }
 768
 769 /**
 770  *      sprintf_Scsi_Cmnd       -       print a scsi command
 771  *      @buffer: buffr to print into
 772  *      @len: buffer length
 773  *      @cmd: SCSI command block
 774  *
 775  *      Print out the target and command data in hex
 776  */
 777
 778 static int sprint_Scsi_Cmnd(char *buffer, int len, Scsi_Cmnd * cmd)
 779 {
 780         int start = len;
 781         PRINTP("host number %d destination target %d, lun %d\n" ANDP cmd->device->host->host_no ANDP cmd->device->id ANDP cmd->device->lun);
 782         PRINTP("        command = ");
 783         len += sprint_command(buffer, len, cmd->cmnd);
 784         return len - start;
 785 }
 786
 787 /**
 788  *      generic_NCR5380_proc_info       -       /proc for NCR5380 driver
 789  *      @buffer: buffer to print into
 790  *      @start: start position
 791  *      @offset: offset into buffer
 792  *      @len: length
 793  *      @hostno: instance to affect
 794  *      @inout: read/write
 795  *
 796  *      Provide the procfs information for the 5380 controller. We fill
 797  *      this with useful debugging information including the commands
 798  *      being executed, disconnected command queue and the statistical
 799  *      data
 800  *
 801  *      Locks: global cli/lock for queue walk
 802  */
 803
 804 static int generic_NCR5380_proc_info(struct Scsi_Host *scsi_ptr, char *buffer, char **start, off_t offset, int length, int inout)
 805 {
 806         int len = 0;
 807         NCR5380_local_declare();
 808         unsigned long flags;
 809         unsigned char status;
 810         int i;
 811         Scsi_Cmnd *ptr;
 812         struct NCR5380_hostdata *hostdata;
 813 #ifdef NCR5380_STATS
 814         struct scsi_device *dev;
 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 scsi_device_type(dev->type));
 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 #ifndef SCSI_G_NCR5380_MEM
 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 #endif
 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);