aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/tty_ldisc.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/tty_ldisc.h')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.2 (git 2.25.0) at 2025-10-07 16:31:28 -0400
='n222' href='#n222'>222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 
/* 
 *  NCR53c406.c
 *  Low-level SCSI driver for NCR53c406a chip.
 *  Copyright (C) 1994, 1995, 1996 Normunds Saumanis (normunds@fi.ibm.com)
 * 
 *  LILO command line usage: ncr53c406a=<PORTBASE>[,<IRQ>[,<FASTPIO>]]
 *  Specify IRQ = 0 for non-interrupt driven mode.
 *  FASTPIO = 1 for fast pio mode, 0 for slow mode.
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the
 *  Free Software Foundation; either version 2, or (at your option) any
 *  later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 */

#define NCR53C406A_DEBUG 0
#define VERBOSE_NCR53C406A_DEBUG 0

/* Set this to 1 for PIO mode (recommended) or to 0 for DMA mode */
#define USE_PIO 1

#define USE_BIOS 0
				/* #define BIOS_ADDR 0xD8000 *//* define this if autoprobe fails */
				/* #define PORT_BASE 0x330 *//* define this if autoprobe fails */
				/* #define IRQ_LEV   0	*//* define this if autoprobe fails */
#define DMA_CHAN  5		/* this is ignored if DMA is disabled */

/* Set this to 0 if you encounter kernel lockups while transferring 
 * data in PIO mode */
#define USE_FAST_PIO 1

/* ============= End of user configurable parameters ============= */

#include <linux/module.h>

#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/irq.h>

#include <linux/blkdev.h>
#include <linux/spinlock.h>
#include "scsi.h"
#include <scsi/scsi_host.h>

/* ============================================================= */

#define WATCHDOG 5000000

#define SYNC_MODE 0		/* Synchronous transfer mode */

#ifdef DEBUG
#undef NCR53C406A_DEBUG
#define NCR53C406A_DEBUG 1
#endif

#if USE_PIO
#define USE_DMA 0
#else
#define USE_DMA 1
#endif

/* Default configuration */
#define C1_IMG   0x07		/* ID=7 */
#define C2_IMG   0x48		/* FE SCSI2 */
#if USE_DMA
#define C3_IMG   0x21		/* CDB TE */
#else
#define C3_IMG   0x20		/* CDB */
#endif
#define C4_IMG   0x04		/* ANE */
#define C5_IMG   0xb6		/* AA PI SIE POL */

#define REG0 (outb(C4_IMG, CONFIG4))
#define REG1 (outb(C5_IMG, CONFIG5))

#if NCR53C406A_DEBUG
#define DEB(x) x
#else
#define DEB(x)
#endif

#if VERBOSE_NCR53C406A_DEBUG
#define VDEB(x) x
#else
#define VDEB(x)
#endif

#define LOAD_DMA_COUNT(count) \
  outb(count & 0xff, TC_LSB); \
  outb((count >> 8) & 0xff, TC_MSB); \
  outb((count >> 16) & 0xff, TC_HIGH);

/* Chip commands */
#define DMA_OP               0x80

#define SCSI_NOP             0x00
#define FLUSH_FIFO           0x01
#define CHIP_RESET           0x02
#define SCSI_RESET           0x03
#define RESELECT             0x40
#define SELECT_NO_ATN        0x41
#define SELECT_ATN           0x42
#define SELECT_ATN_STOP      0x43
#define ENABLE_SEL           0x44
#define DISABLE_SEL          0x45
#define SELECT_ATN3          0x46
#define RESELECT3            0x47
#define TRANSFER_INFO        0x10
#define INIT_CMD_COMPLETE    0x11
#define MSG_ACCEPT           0x12
#define TRANSFER_PAD         0x18
#define SET_ATN              0x1a
#define RESET_ATN            0x1b
#define SEND_MSG             0x20
#define SEND_STATUS          0x21
#define SEND_DATA            0x22
#define DISCONN_SEQ          0x23
#define TERMINATE_SEQ        0x24
#define TARG_CMD_COMPLETE    0x25
#define DISCONN              0x27
#define RECV_MSG             0x28
#define RECV_CMD             0x29
#define RECV_DATA            0x2a
#define RECV_CMD_SEQ         0x2b
#define TARGET_ABORT_DMA     0x04

/*----------------------------------------------------------------*/
/* the following will set the monitor border color (useful to find
   where something crashed or gets stuck at */
/* 1 = blue
   2 = green
   3 = cyan
   4 = red
   5 = magenta
   6 = yellow
   7 = white
*/

#if NCR53C406A_DEBUG
#define rtrc(i) {inb(0x3da);outb(0x31,0x3c0);outb((i),0x3c0);}
#else
#define rtrc(i) {}
#endif
/*----------------------------------------------------------------*/

enum Phase {
	idle,
	data_out,
	data_in,
	command_ph,
	status_ph,
	message_out,
	message_in
};

/* Static function prototypes */
static void NCR53c406a_intr(void *);
static irqreturn_t do_NCR53c406a_intr(int, void *);
static void chip_init(void);
static void calc_port_addr(void);
#ifndef IRQ_LEV
static int irq_probe(void);
#endif

/* ================================================================= */

#if USE_BIOS
static void *bios_base;
#endif

#ifdef PORT_BASE
static int port_base = PORT_BASE;
#else
static int port_base;
#endif

#ifdef IRQ_LEV
static int irq_level = IRQ_LEV;
#else
static int irq_level = -1;	/* 0 is 'no irq', so use -1 for 'uninitialized' */
#endif

#if USE_DMA
static int dma_chan;
#endif

#if USE_PIO
static int fast_pio = USE_FAST_PIO;
#endif

static Scsi_Cmnd *current_SC;
static char info_msg[256];

/* ================================================================= */

/* possible BIOS locations */
#if USE_BIOS
static void *addresses[] = {
	(void *) 0xd8000,
	(void *) 0xc8000
};
#define ADDRESS_COUNT ARRAY_SIZE(addresses)
#endif				/* USE_BIOS */

/* possible i/o port addresses */
static unsigned short ports[] = { 0x230, 0x330, 0x280, 0x290, 0x330, 0x340, 0x300, 0x310, 0x348, 0x350 };
#define PORT_COUNT ARRAY_SIZE(ports)

#ifndef MODULE
/* possible interrupt channels */
static unsigned short intrs[] = { 10, 11, 12, 15 };
#define INTR_COUNT ARRAY_SIZE(intrs)
#endif /* !MODULE */

/* signatures for NCR 53c406a based controllers */
#if USE_BIOS
struct signature {
	char *signature;
	int sig_offset;
	int sig_length;
} signatures[] __initdata = {
	/*          1         2         3         4         5         6 */
	/* 123456789012345678901234567890123456789012345678901234567890 */
	{
"Copyright (C) Acculogic, Inc.\r\n2.8M Diskette Extension Bios ver 4.04.03 03/01/1993", 61, 82},};

#define SIGNATURE_COUNT ARRAY_SIZE(signatures)
#endif				/* USE_BIOS */

/* ============================================================ */

/* Control Register Set 0 */
static int TC_LSB;		/* transfer counter lsb         */
static int TC_MSB;		/* transfer counter msb */
static int SCSI_FIFO;		/* scsi fifo register   */
static int CMD_REG;		/* command register             */
static int STAT_REG;		/* status register              */
static int DEST_ID;		/* selection/reselection bus id */
static int INT_REG;		/* interrupt status register    */
static int SRTIMOUT;		/* select/reselect timeout reg  */
static int SEQ_REG;		/* sequence step register       */
static int SYNCPRD;		/* synchronous transfer period  */
static int FIFO_FLAGS;		/* indicates # of bytes in fifo */
static int SYNCOFF;		/* synchronous offset register  */
static int CONFIG1;		/* configuration register       */
static int CLKCONV;		/* clock conversion reg */
				/*static int TESTREG;*//* test mode register           */
static int CONFIG2;		/* Configuration 2 Register     */
static int CONFIG3;		/* Configuration 3 Register     */
static int CONFIG4;		/* Configuration 4 Register     */
static int TC_HIGH;		/* Transfer Counter High */
				/*static int FIFO_BOTTOM;*//* Reserve FIFO byte register   */

/* Control Register Set 1 */
				/*static int JUMPER_SENSE;*//* Jumper sense port reg (r/w) */
				/*static int SRAM_PTR;*//* SRAM address pointer reg (r/w) */
				/*static int SRAM_DATA;*//* SRAM data register (r/w) */
static int PIO_FIFO;		/* PIO FIFO registers (r/w) */
				/*static int PIO_FIFO1;*//*  */
				/*static int PIO_FIFO2;*//*  */
				/*static int PIO_FIFO3;*//*  */
static int PIO_STATUS;		/* PIO status (r/w) */
				/*static int ATA_CMD;*//* ATA command/status reg (r/w) */
				/*static int ATA_ERR;*//* ATA features/error register (r/w) */
static int PIO_FLAG;		/* PIO flag interrupt enable (r/w) */
static int CONFIG5;		/* Configuration 5 register (r/w) */
				/*static int SIGNATURE;*//* Signature Register (r) */
				/*static int CONFIG6;*//* Configuration 6 register (r) */

/* ============================================================== */

#if USE_DMA
static __inline__ int NCR53c406a_dma_setup(unsigned char *ptr, unsigned int count, unsigned char mode)
{
	unsigned limit;
	unsigned long flags = 0;

	VDEB(printk("dma: before count=%d   ", count));
	if (dma_chan <= 3) {
		if (count > 65536)
			count = 65536;
		limit = 65536 - (((unsigned) ptr) & 0xFFFF);
	} else {
		if (count > (65536 << 1))
			count = (65536 << 1);
		limit = (65536 << 1) - (((unsigned) ptr) & 0x1FFFF);
	}

	if (count > limit)
		count = limit;

	VDEB(printk("after count=%d\n", count));
	if ((count & 1) || (((unsigned) ptr) & 1))
		panic("NCR53c406a: attempted unaligned DMA transfer\n");

	flags = claim_dma_lock();
	disable_dma(dma_chan);
	clear_dma_ff(dma_chan);
	set_dma_addr(dma_chan, (long) ptr);
	set_dma_count(dma_chan, count);
	set_dma_mode(dma_chan, mode);
	enable_dma(dma_chan);
	release_dma_lock(flags);

	return count;
}

static __inline__ int NCR53c406a_dma_write(unsigned char *src, unsigned int count)
{
	return NCR53c406a_dma_setup(src, count, DMA_MODE_WRITE);
}

static __inline__ int NCR53c406a_dma_read(unsigned char *src, unsigned int count)
{
	return NCR53c406a_dma_setup(src, count, DMA_MODE_READ);
}

static __inline__ int NCR53c406a_dma_residual(void)
{
	register int tmp;
	unsigned long flags;

	flags = claim_dma_lock();
	clear_dma_ff(dma_chan);
	tmp = get_dma_residue(dma_chan);
	release_dma_lock(flags);

	return tmp;
}
#endif				/* USE_DMA */

#if USE_PIO
static __inline__ int NCR53c406a_pio_read(unsigned char *request, unsigned int reqlen)
{
	int i;
	int len;		/* current scsi fifo size */

	REG1;
	while (reqlen) {
		i = inb(PIO_STATUS);
		/*    VDEB(printk("pio_status=%x\n", i)); */
		if (i & 0x80)
			return 0;

		switch (i & 0x1e) {
		default:
		case 0x10:
			len = 0;
			break;
		case 0x0:
			len = 1;
			break;
		case 0x8:
			len = 42;
			break;
		case 0xc:
			len = 84;
			break;
		case 0xe:
			len = 128;
			break;
		}

		if ((i & 0x40) && len == 0) {	/* fifo empty and interrupt occurred */
			return 0;
		}

		if (len) {
			if (len > reqlen)
				len = reqlen;

			if (fast_pio && len > 3) {
				insl(PIO_FIFO, request, len >> 2);
				request += len & 0xfc;
				reqlen -= len & 0xfc;
			} else {
				while (len--) {
					*request++ = inb(PIO_FIFO);
					reqlen--;
				}
			}
		}
	}
	return 0;
}

static __inline__ int NCR53c406a_pio_write(unsigned char *request, unsigned int reqlen)
{
	int i = 0;
	int len;		/* current scsi fifo size */

	REG1;
	while (reqlen && !(i & 0x40)) {
		i = inb(PIO_STATUS);
		/*    VDEB(printk("pio_status=%x\n", i)); */
		if (i & 0x80)	/* error */
			return 0;

		switch (i & 0x1e) {
		case 0x10:
			len = 128;
			break;
		case 0x0:
			len = 84;
			break;
		case 0x8:
			len = 42;
			break;
		case 0xc:
			len = 1;
			break;
		default:
		case 0xe:
			len = 0;
			break;
		}

		if (len) {
			if (len > reqlen)
				len = reqlen;

			if (fast_pio && len > 3) {
				outsl(PIO_FIFO, request, len >> 2);
				request += len & 0xfc;
				reqlen -= len & 0xfc;
			} else {
				while (len--) {
					outb(*request++, PIO_FIFO);
					reqlen--;
				}
			}
		}
	}
	return 0;
}
#endif				/* USE_PIO */

static int __init NCR53c406a_detect(struct scsi_host_template * tpnt)
{
	int present = 0;
	struct Scsi_Host *shpnt = NULL;