g_NCR5380.c 25 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945
/*
 * Generic Generic NCR5380 driver
 *	
 * Copyright 1993, Drew Eckhardt
 *	Visionary Computing
 *	(Unix and Linux consulting and custom programming)
 *	drew@colorado.edu
 *      +1 (303) 440-4894
 *
 * NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin
 *    K.Lentin@cs.monash.edu.au
 *
 * NCR53C400A extensions (c) 1996, Ingmar Baumgart
 *    ingmar@gonzo.schwaben.de
 *
 * DTC3181E extensions (c) 1997, Ronald van Cuijlenborg
 * ronald.van.cuijlenborg@tip.nl or nutty@dds.nl
 *
 * Added ISAPNP support for DTC436 adapters,
 * Thomas Sailer, sailer@ife.ee.ethz.ch
 *
 * ALPHA RELEASE 1. 
 *
 * For more information, please consult 
 *
 * NCR 5380 Family
 * SCSI Protocol Controller
 * Databook
 *
 * NCR Microelectronics
 * 1635 Aeroplaza Drive
 * Colorado Springs, CO 80916
 * 1+ (719) 578-3400
 * 1+ (800) 334-5454
 */

/* 
 * TODO : flesh out DMA support, find some one actually using this (I have
 * 	a memory mapped Trantor board that works fine)
 */

/*
 * Options :
 *
 * PARITY - enable parity checking.  Not supported.
 *
 * SCSI2 - enable support for SCSI-II tagged queueing.  Untested.
 *
 * USLEEP - enable support for devices that don't disconnect.  Untested.
 *
 * The card is detected and initialized in one of several ways : 
 * 1.  With command line overrides - NCR5380=port,irq may be 
 *     used on the LILO command line to override the defaults.
 *
 * 2.  With the GENERIC_NCR5380_OVERRIDE compile time define.  This is 
 *     specified as an array of address, irq, dma, board tuples.  Ie, for
 *     one board at 0x350, IRQ5, no dma, I could say  
 *     -DGENERIC_NCR5380_OVERRIDE={{0xcc000, 5, DMA_NONE, BOARD_NCR5380}}
 * 
 * -1 should be specified for no or DMA interrupt, -2 to autoprobe for an 
 * 	IRQ line if overridden on the command line.
 *
 * 3.  When included as a module, with arguments passed on the command line:
 *         ncr_irq=xx	the interrupt
 *         ncr_addr=xx  the port or base address (for port or memory
 *              	mapped, resp.)
 *         ncr_dma=xx	the DMA
 *         ncr_5380=1	to set up for a NCR5380 board
 *         ncr_53c400=1	to set up for a NCR53C400 board
 *     e.g.
 *     modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
 *       for a port mapped NCR5380 board or
 *     modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
 *       for a memory mapped NCR53C400 board with interrupts disabled.
 * 
 * 255 should be specified for no or DMA interrupt, 254 to autoprobe for an 
 * 	IRQ line if overridden on the command line.
 *     
 */

/*
 * $Log: generic_NCR5380.c,v $
 */

/* settings for DTC3181E card with only Mustek scanner attached */
#define USLEEP
#define USLEEP_POLL	1
#define USLEEP_SLEEP	20
#define USLEEP_WAITLONG	500

#define AUTOPROBE_IRQ
#define AUTOSENSE


#ifdef CONFIG_SCSI_GENERIC_NCR53C400
#define NCR53C400_PSEUDO_DMA 1
#define PSEUDO_DMA
#define NCR53C400
#define NCR5380_STATS
#undef NCR5380_STAT_LIMIT
#endif

#include <asm/io.h>
#include <linux/signal.h>
#include <linux/blkdev.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include "g_NCR5380.h"
#include "NCR5380.h"
#include <linux/stat.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/isapnp.h>
#include <linux/delay.h>
#include <linux/interrupt.h>

#define NCR_NOT_SET 0
static int ncr_irq = NCR_NOT_SET;
static int ncr_dma = NCR_NOT_SET;
static int ncr_addr = NCR_NOT_SET;
static int ncr_5380 = NCR_NOT_SET;
static int ncr_53c400 = NCR_NOT_SET;
static int ncr_53c400a = NCR_NOT_SET;
static int dtc_3181e = NCR_NOT_SET;

static struct override {
	NCR5380_map_type NCR5380_map_name;
	int irq;
	int dma;
	int board;		/* Use NCR53c400, Ricoh, etc. extensions ? */
} overrides
#ifdef GENERIC_NCR5380_OVERRIDE
[] __initdata = GENERIC_NCR5380_OVERRIDE;
#else
[1] __initdata = { { 0,},};
#endif

#define NO_OVERRIDES ARRAY_SIZE(overrides)

#ifndef MODULE

/**
 *	internal_setup		-	handle lilo command string override
 *	@board:	BOARD_* identifier for the board
 *	@str: unused
 *	@ints: numeric parameters
 *
 * 	Do LILO command line initialization of the overrides array. Display
 *	errors when needed
 *
 *	Locks: none
 */

static void __init internal_setup(int board, char *str, int *ints)
{
	static int commandline_current = 0;
	switch (board) {
	case BOARD_NCR5380:
		if (ints[0] != 2 && ints[0] != 3) {
			printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
			return;
		}
		break;
	case BOARD_NCR53C400:
		if (ints[0] != 2) {
			printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
			return;
		}
		break;
	case BOARD_NCR53C400A:
		if (ints[0] != 2) {
			printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
			return;
		}
		break;
	case BOARD_DTC3181E:
		if (ints[0] != 2) {
			printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
			return;
		}
		break;
	}

	if (commandline_current < NO_OVERRIDES) {
		overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
		overrides[commandline_current].irq = ints[2];
		if (ints[0] == 3)
			overrides[commandline_current].dma = ints[3];
		else
			overrides[commandline_current].dma = DMA_NONE;
		overrides[commandline_current].board = board;
		++commandline_current;
	}
}


/**
 * 	do_NCR53C80_setup		-	set up entry point
 *	@str: unused
 *
 *	Setup function invoked at boot to parse the ncr5380= command
 *	line.
 */

static int __init do_NCR5380_setup(char *str)
{
	int ints[10];

	get_options(str, ARRAY_SIZE(ints), ints);
	internal_setup(BOARD_NCR5380, str, ints);
	return 1;
}

/**
 * 	do_NCR53C400_setup		-	set up entry point
 *	@str: unused
 *	@ints: integer parameters from kernel setup code
 *
 *	Setup function invoked at boot to parse the ncr53c400= command
 *	line.
 */

static int __init do_NCR53C400_setup(char *str)
{
	int ints[10];

	get_options(str, ARRAY_SIZE(ints), ints);
	internal_setup(BOARD_NCR53C400, str, ints);
	return 1;
}

/**
 * 	do_NCR53C400A_setup	-	set up entry point
 *	@str: unused
 *	@ints: integer parameters from kernel setup code
 *
 *	Setup function invoked at boot to parse the ncr53c400a= command
 *	line.
 */

static int __init do_NCR53C400A_setup(char *str)
{
	int ints[10];

	get_options(str, ARRAY_SIZE(ints), ints);
	internal_setup(BOARD_NCR53C400A, str, ints);
	return 1;
}

/**
 * 	do_DTC3181E_setup	-	set up entry point
 *	@str: unused
 *	@ints: integer parameters from kernel setup code
 *
 *	Setup function invoked at boot to parse the dtc3181e= command
 *	line.
 */

static int __init do_DTC3181E_setup(char *str)
{
	int ints[10];

	get_options(str, ARRAY_SIZE(ints), ints);
	internal_setup(BOARD_DTC3181E, str, ints);
	return 1;
}

#endif

/**
 * 	generic_NCR5380_detect	-	look for NCR5380 controllers
 *	@tpnt: the scsi template
 *
 *	Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
 *	and DTC436(ISAPnP) controllers. If overrides have been set we use
 *	them.
 *
 *	The caller supplied NCR5380_init function is invoked from here, before
 *	the interrupt line is taken.
 *
 *	Locks: none
 */

int __init generic_NCR5380_detect(struct scsi_host_template * tpnt)
{
	static int current_override = 0;
	int count;
	unsigned int *ports;
#ifndef SCSI_G_NCR5380_MEM
	int i;
	unsigned long region_size = 16;
#endif
	static unsigned int __initdata ncr_53c400a_ports[] = {
		0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
	};
	static unsigned int __initdata dtc_3181e_ports[] = {
		0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
	};
	int flags = 0;
	struct Scsi_Host *instance;
#ifdef SCSI_G_NCR5380_MEM
	unsigned long base;
	void __iomem *iomem;
#endif

	if (ncr_irq != NCR_NOT_SET)
		overrides[0].irq = ncr_irq;
	if (ncr_dma != NCR_NOT_SET)
		overrides[0].dma = ncr_dma;
	if (ncr_addr != NCR_NOT_SET)
		overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
	if (ncr_5380 != NCR_NOT_SET)
		overrides[0].board = BOARD_NCR5380;
	else if (ncr_53c400 != NCR_NOT_SET)
		overrides[0].board = BOARD_NCR53C400;
	else if (ncr_53c400a != NCR_NOT_SET)
		overrides[0].board = BOARD_NCR53C400A;
	else if (dtc_3181e != NCR_NOT_SET)
		overrides[0].board = BOARD_DTC3181E;
#ifndef SCSI_G_NCR5380_MEM
	if (!current_override && isapnp_present()) {
		struct pnp_dev *dev = NULL;
		count = 0;
		while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
			if (count >= NO_OVERRIDES)
				break;
			if (pnp_device_attach(dev) < 0)
				continue;
			if (pnp_activate_dev(dev) < 0) {
				printk(KERN_ERR "dtc436e probe: activate failed\n");
				pnp_device_detach(dev);
				continue;
			}
			if (!pnp_port_valid(dev, 0)) {
				printk(KERN_ERR "dtc436e probe: no valid port\n");
				pnp_device_detach(dev);
				continue;
			}
			if (pnp_irq_valid(dev, 0))
				overrides[count].irq = pnp_irq(dev, 0);
			else
				overrides[count].irq = SCSI_IRQ_NONE;
			if (pnp_dma_valid(dev, 0))
				overrides[count].dma = pnp_dma(dev, 0);
			else
				overrides[count].dma = DMA_NONE;
			overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
			overrides[count].board = BOARD_DTC3181E;
			count++;
		}
	}
#endif
	tpnt->proc_name = "g_NCR5380";

	for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
		if (!(overrides[current_override].NCR5380_map_name))
			continue;

		ports = NULL;
		switch (overrides[current_override].board) {
		case BOARD_NCR5380:
			flags = FLAG_NO_PSEUDO_DMA;
			break;
		case BOARD_NCR53C400:
			flags = FLAG_NCR53C400;
			break;
		case BOARD_NCR53C400A:
			flags = FLAG_NO_PSEUDO_DMA;
			ports = ncr_53c400a_ports;
			break;
		case BOARD_DTC3181E:
			flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
			ports = dtc_3181e_ports;
			break;
		}

#ifndef SCSI_G_NCR5380_MEM
		if (ports) {
			/* wakeup sequence for the NCR53C400A and DTC3181E */

			/* Disable the adapter and look for a free io port */
			outb(0x59, 0x779);
			outb(0xb9, 0x379);
			outb(0xc5, 0x379);
			outb(0xae, 0x379);
			outb(0xa6, 0x379);
			outb(0x00, 0x379);

			if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
				for (i = 0; ports[i]; i++) {
					if (!request_region(ports[i],  16, "ncr53c80"))
						continue;
					if (overrides[current_override].NCR5380_map_name == ports[i])
						break;
					release_region(ports[i], 16);
			} else
				for (i = 0; ports[i]; i++) {
					if (!request_region(ports[i],  16, "ncr53c80"))
						continue;
					if (inb(ports[i]) == 0xff)
						break;
					release_region(ports[i], 16);
				}
			if (ports[i]) {
				/* At this point we have our region reserved */
				outb(0x59, 0x779);
				outb(0xb9, 0x379);
				outb(0xc5, 0x379);
				outb(0xae, 0x379);
				outb(0xa6, 0x379);
				outb(0x80 | i, 0x379);	/* set io port to be used */
				outb(0xc0, ports[i] + 9);
				if (inb(ports[i] + 9) != 0x80)
					continue;
				else
					overrides[current_override].NCR5380_map_name = ports[i];
			} else
				continue;
		}
		else
		{
			/* Not a 53C400A style setup - just grab */
			if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
				continue;
			region_size = NCR5380_region_size;
		}
#else
		base = overrides[current_override].NCR5380_map_name;
		if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
			continue;
		iomem = ioremap(base, NCR5380_region_size);
		if (!iomem) {
			release_mem_region(base, NCR5380_region_size);
			continue;
		}
#endif
		instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
		if (instance == NULL) {
#ifndef SCSI_G_NCR5380_MEM
			release_region(overrides[current_override].NCR5380_map_name, region_size);
#else
			iounmap(iomem);
			release_mem_region(base, NCR5380_region_size);
#endif
			continue;
		}

		instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name;
#ifndef SCSI_G_NCR5380_MEM
		instance->n_io_port = region_size;
#else
		((struct NCR5380_hostdata *)instance->hostdata)->iomem = iomem;
#endif

		NCR5380_init(instance, flags);

		if (overrides[current_override].irq != IRQ_AUTO)
			instance->irq = overrides[current_override].irq;
		else
			instance->irq = NCR5380_probe_irq(instance, 0xffff);

		if (instance->irq != SCSI_IRQ_NONE)
			if (request_irq(instance->irq, generic_NCR5380_intr,
					IRQF_DISABLED, "NCR5380", instance)) {
				printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
				instance->irq = SCSI_IRQ_NONE;
			}

		if (instance->irq == SCSI_IRQ_NONE) {
			printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
			printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
		}

		printk(KERN_INFO "scsi%d : at " STRVAL(NCR5380_map_name) " 0x%x", instance->host_no, (unsigned int) instance->NCR5380_instance_name);
		if (instance->irq == SCSI_IRQ_NONE)
			printk(" interrupts disabled");
		else
			printk(" irq %d", instance->irq);
		printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d", CAN_QUEUE, CMD_PER_LUN, GENERIC_NCR5380_PUBLIC_RELEASE);
		NCR5380_print_options(instance);
		printk("\n");

		++current_override;
		++count;
	}
	return count;
}

/**
 *	generic_NCR5380_info	-	reporting string
 *	@host: NCR5380 to report on
 *
 *	Report driver information for the NCR5380
 */
 	
const char *generic_NCR5380_info(struct Scsi_Host *host)
{
	static const char string[] = "Generic NCR5380/53C400 Driver";
	return string;
}

/**
 *	generic_NCR5380_release_resources	-	free resources
 *	@instance: host adapter to clean up 
 *
 *	Free the generic interface resources from this adapter.
 *
 *	Locks: none
 */
 
int generic_NCR5380_release_resources(struct Scsi_Host *instance)
{
	NCR5380_local_declare();
	NCR5380_setup(instance);
	
	if (instance->irq != SCSI_IRQ_NONE)
		free_irq(instance->irq, instance);
	NCR5380_exit(instance);

#ifndef SCSI_G_NCR5380_MEM
	release_region(instance->NCR5380_instance_name, instance->n_io_port);
#else
	iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
	release_mem_region(instance->NCR5380_instance_name, NCR5380_region_size);
#endif


	return 0;
}

#ifdef BIOSPARAM
/**
 *	generic_NCR5380_biosparam
 *	@disk: disk to compute geometry for
 *	@dev: device identifier for this disk
 *	@ip: sizes to fill in
 *
 *	Generates a BIOS / DOS compatible H-C-S mapping for the specified 
 *	device / size.
 * 
 * 	XXX Most SCSI boards use this mapping, I could be incorrect.  Someone
 *	using hard disks on a trantor should verify that this mapping
 *	corresponds to that used by the BIOS / ASPI driver by running the linux
 *	fdisk program and matching the H_C_S coordinates to what DOS uses.
 *
 *	Locks: none
 */

static int
generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
			  sector_t capacity, int *ip)
{
	ip[0] = 64;
	ip[1] = 32;
	ip[2] = capacity >> 11;
	return 0;
}
#endif

#ifdef NCR53C400_PSEUDO_DMA

/**
 *	NCR5380_pread		-	pseudo DMA read
 *	@instance: adapter to read from
 *	@dst: buffer to read into
 *	@len: buffer length
 *
 *	Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 *	controller
 */
 
static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
{
	int blocks = len / 128;
	int start = 0;
	int bl;

	NCR5380_local_declare();
	NCR5380_setup(instance);

	NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE | CSR_TRANS_DIR);
	NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
	while (1) {
		if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
			break;
		}
		if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
			printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
			return -1;
		}
		while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY);

#ifndef SCSI_G_NCR5380_MEM
		{
			int i;
			for (i = 0; i < 128; i++)
				dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
		}
#else
		/* implies SCSI_G_NCR5380_MEM */
		memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
#endif
		start += 128;
		blocks--;
	}

	if (blocks) {
		while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
		{
			// FIXME - no timeout
		}

#ifndef SCSI_G_NCR5380_MEM
		{
			int i;	
			for (i = 0; i < 128; i++)
				dst[start + i] = NCR5380_read(C400_HOST_BUFFER);
		}
#else
		/* implies SCSI_G_NCR5380_MEM */
		memcpy_fromio(dst + start, iomem + NCR53C400_host_buffer, 128);
#endif
		start += 128;
		blocks--;
	}

	if (!(NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
		printk("53C400r: no 53C80 gated irq after transfer");

#if 0
	/*
	 *	DON'T DO THIS - THEY NEVER ARRIVE!
	 */
	printk("53C400r: Waiting for 53C80 registers\n");
	while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG)
		;
#endif
	if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
		printk(KERN_ERR "53C400r: no end dma signal\n");
		
	NCR5380_write(MODE_REG, MR_BASE);
	NCR5380_read(RESET_PARITY_INTERRUPT_REG);
	return 0;
}

/**
 *	NCR5380_write		-	pseudo DMA write
 *	@instance: adapter to read from
 *	@dst: buffer to read into
 *	@len: buffer length
 *
 *	Perform a pseudo DMA mode read from an NCR53C400 or equivalent
 *	controller
 */

static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
{
	int blocks = len / 128;
	int start = 0;
	int bl;
	int i;

	NCR5380_local_declare();
	NCR5380_setup(instance);

	NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
	NCR5380_write(C400_BLOCK_COUNTER_REG, blocks);
	while (1) {
		if (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ) {
			printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
			return -1;
		}

		if ((bl = NCR5380_read(C400_BLOCK_COUNTER_REG)) == 0) {
			break;
		}
		while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
			; // FIXME - timeout
#ifndef SCSI_G_NCR5380_MEM
		{
			for (i = 0; i < 128; i++)
				NCR5380_write(C400_HOST_BUFFER, src[start + i]);
		}
#else
		/* implies SCSI_G_NCR5380_MEM */
		memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
#endif
		start += 128;
		blocks--;
	}
	if (blocks) {
		while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_HOST_BUF_NOT_RDY)
			; // FIXME - no timeout

#ifndef SCSI_G_NCR5380_MEM
		{
			for (i = 0; i < 128; i++)
				NCR5380_write(C400_HOST_BUFFER, src[start + i]);
		}
#else
		/* implies SCSI_G_NCR5380_MEM */
		memcpy_toio(iomem + NCR53C400_host_buffer, src + start, 128);
#endif
		start += 128;
		blocks--;
	}

#if 0
	printk("53C400w: waiting for registers to be available\n");
	THEY NEVER DO ! while (NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_53C80_REG);
	printk("53C400w: Got em\n");
#endif

	/* Let's wait for this instead - could be ugly */
	/* All documentation says to check for this. Maybe my hardware is too
	 * fast. Waiting for it seems to work fine! KLL
	 */
	while (!(i = NCR5380_read(C400_CONTROL_STATUS_REG) & CSR_GATED_53C80_IRQ))
		;	// FIXME - no timeout

	/*
	 * I know. i is certainly != 0 here but the loop is new. See previous
	 * comment.
	 */
	if (i) {
		if (!((i = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_END_DMA_TRANSFER))
			printk(KERN_ERR "53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i);
	} else
		printk(KERN_ERR "53C400w: no 53C80 gated irq after transfer (last block)\n");

#if 0
	if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
		printk(KERN_ERR "53C400w: no end dma signal\n");
	}
#endif
	while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
		; 	// TIMEOUT
	return 0;
}
#endif				/* PSEUDO_DMA */

/*
 *	Include the NCR5380 core code that we build our driver around	
 */
 
#include "NCR5380.c"

#define PRINTP(x) seq_printf(m, x)
#define ANDP ,

static void sprint_opcode(struct seq_file *m, int opcode)
{
	PRINTP("0x%02x " ANDP opcode);
}

static void sprint_command(struct seq_file *m, unsigned char *command)
{
	int i, s;
	sprint_opcode(m, command[0]);
	for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
		PRINTP("%02x " ANDP command[i]);
	PRINTP("\n");
}

/**
 *	sprintf_Scsi_Cmnd	-	print a scsi command
 *	@m: seq_fil to print into
 *	@cmd: SCSI command block
 *	
 *	Print out the target and command data in hex
 */

static void sprint_Scsi_Cmnd(struct seq_file *m, Scsi_Cmnd * cmd)
{
	PRINTP("host number %d destination target %d, lun %d\n" ANDP cmd->device->host->host_no ANDP cmd->device->id ANDP cmd->device->lun);
	PRINTP("        command = ");
	sprint_command(m, cmd->cmnd);
}

/**
 *	generic_NCR5380_proc_info	-	/proc for NCR5380 driver
 *	@buffer: buffer to print into
 *	@start: start position
 *	@offset: offset into buffer
 *	@len: length
 *	@hostno: instance to affect
 *	@inout: read/write
 *
 *	Provide the procfs information for the 5380 controller. We fill
 *	this with useful debugging information including the commands
 *	being executed, disconnected command queue and the statistical
 *	data
 *
 *	Locks: global cli/lock for queue walk
 */
 
static int generic_NCR5380_show_info(struct seq_file *m, struct Scsi_Host *scsi_ptr)
{
	NCR5380_local_declare();
	unsigned long flags;
	unsigned char status;
	int i;
	Scsi_Cmnd *ptr;
	struct NCR5380_hostdata *hostdata;
#ifdef NCR5380_STATS
	struct scsi_device *dev;
#endif

	NCR5380_setup(scsi_ptr);
	hostdata = (struct NCR5380_hostdata *) scsi_ptr->hostdata;

	spin_lock_irqsave(scsi_ptr->host_lock, flags);
	PRINTP("SCSI host number %d : %s\n" ANDP scsi_ptr->host_no ANDP scsi_ptr->hostt->name);
	PRINTP("Generic NCR5380 driver version %d\n" ANDP GENERIC_NCR5380_PUBLIC_RELEASE);
	PRINTP("NCR5380 core version %d\n" ANDP NCR5380_PUBLIC_RELEASE);
#ifdef NCR53C400
	PRINTP("NCR53C400 extension version %d\n" ANDP NCR53C400_PUBLIC_RELEASE);
	PRINTP("NCR53C400 card%s detected\n" ANDP(((struct NCR5380_hostdata *) scsi_ptr->hostdata)->flags & FLAG_NCR53C400) ? "" : " not");
# if NCR53C400_PSEUDO_DMA
	PRINTP("NCR53C400 pseudo DMA used\n");
# endif
#else
	PRINTP("NO NCR53C400 driver extensions\n");
#endif
	PRINTP("Using %s mapping at %s 0x%lx, " ANDP STRVAL(NCR5380_map_config) ANDP STRVAL(NCR5380_map_name) ANDP scsi_ptr->NCR5380_instance_name);
	if (scsi_ptr->irq == SCSI_IRQ_NONE)
		PRINTP("no interrupt\n");
	else
		PRINTP("on interrupt %d\n" ANDP scsi_ptr->irq);

#ifdef NCR5380_STATS
	if (hostdata->connected || hostdata->issue_queue || hostdata->disconnected_queue)
		PRINTP("There are commands pending, transfer rates may be crud\n");
	if (hostdata->pendingr)
		PRINTP("  %d pending reads" ANDP hostdata->pendingr);
	if (hostdata->pendingw)
		PRINTP("  %d pending writes" ANDP hostdata->pendingw);
	if (hostdata->pendingr || hostdata->pendingw)
		PRINTP("\n");
	shost_for_each_device(dev, scsi_ptr) {
		unsigned long br = hostdata->bytes_read[dev->id];
		unsigned long bw = hostdata->bytes_write[dev->id];
		long tr = hostdata->time_read[dev->id] / HZ;
		long tw = hostdata->time_write[dev->id] / HZ;

		PRINTP("  T:%d %s " ANDP dev->id ANDP scsi_device_type(dev->type));
		for (i = 0; i < 8; i++)
			if (dev->vendor[i] >= 0x20)
				seq_putc(m, dev->vendor[i]);
		seq_putc(m, ' ');
		for (i = 0; i < 16; i++)
			if (dev->model[i] >= 0x20)
				seq_putc(m, dev->model[i]);
		seq_putc(m, ' ');
		for (i = 0; i < 4; i++)
			if (dev->rev[i] >= 0x20)
				seq_putc(m, dev->rev[i]);
		seq_putc(m, ' ');

		PRINTP("\n%10ld kb read    in %5ld secs" ANDP br / 1024 ANDP tr);
		if (tr)
			PRINTP(" @ %5ld bps" ANDP br / tr);

		PRINTP("\n%10ld kb written in %5ld secs" ANDP bw / 1024 ANDP tw);
		if (tw)
			PRINTP(" @ %5ld bps" ANDP bw / tw);
		PRINTP("\n");
	}
#endif

	status = NCR5380_read(STATUS_REG);
	if (!(status & SR_REQ))
		PRINTP("REQ not asserted, phase unknown.\n");
	else {
		for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i);
		PRINTP("Phase %s\n" ANDP phases[i].name);
	}

	if (!hostdata->connected) {
		PRINTP("No currently connected command\n");
	} else {
		sprint_Scsi_Cmnd(m, (Scsi_Cmnd *) hostdata->connected);
	}

	PRINTP("issue_queue\n");

	for (ptr = (Scsi_Cmnd *) hostdata->issue_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
		sprint_Scsi_Cmnd(m, ptr);

	PRINTP("disconnected_queue\n");

	for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
		sprint_Scsi_Cmnd(m, ptr);

	spin_unlock_irqrestore(scsi_ptr->host_lock, flags);
	return 0;
}

#undef PRINTP
#undef ANDP

static struct scsi_host_template driver_template = {
	.show_info      	= generic_NCR5380_show_info,
	.name           	= "Generic NCR5380/NCR53C400 Scsi Driver",
	.detect         	= generic_NCR5380_detect,
	.release        	= generic_NCR5380_release_resources,
	.info           	= generic_NCR5380_info,
	.queuecommand   	= generic_NCR5380_queue_command,
	.eh_abort_handler	= generic_NCR5380_abort,
	.eh_bus_reset_handler	= generic_NCR5380_bus_reset,
	.bios_param     	= NCR5380_BIOSPARAM,
	.can_queue      	= CAN_QUEUE,
        .this_id        	= 7,
        .sg_tablesize   	= SG_ALL,
	.cmd_per_lun    	= CMD_PER_LUN,
        .use_clustering		= DISABLE_CLUSTERING,
};
#include <linux/module.h>
#include "scsi_module.c"

module_param(ncr_irq, int, 0);
module_param(ncr_dma, int, 0);
module_param(ncr_addr, int, 0);
module_param(ncr_5380, int, 0);
module_param(ncr_53c400, int, 0);
module_param(ncr_53c400a, int, 0);
module_param(dtc_3181e, int, 0);
MODULE_LICENSE("GPL");

#ifndef SCSI_G_NCR5380_MEM
static struct isapnp_device_id id_table[] = {
	{
	 ISAPNP_ANY_ID, ISAPNP_ANY_ID,
	 ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
	 0},
	{0}
};

MODULE_DEVICE_TABLE(isapnp, id_table);
#endif

__setup("ncr5380=", do_NCR5380_setup);
__setup("ncr53c400=", do_NCR53C400_setup);
__setup("ncr53c400a=", do_NCR53C400A_setup);
__setup("dtc3181e=", do_DTC3181E_setup);