cmd_ide.c

ARM的bootloader代码.rar

/*
 * (C) Copyright 2000, 2001
 * Wolfgang Denk, DENX Software Engineering, [e-mail].
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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 of
 * the License, 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 */

/*
 * IDE support
 */
#include <armboot.h>
#include <config.h>
#include <command.h>
#include <image.h>
#ifdef CONFIG_IDE_PCMCIA
# include <pcmcia.h>
#endif
#include <ide.h>
#include <ata.h>
#include <part.h>
#include <cmd_ide.h>
#include <cmd_disk.h>
#include <cmd_pcmcia.h>
#ifdef CONFIG_STATUS_LED
# include <status_led.h>
#endif


//#undef	IDE_DEBUG
#define	IDE_DEBUG

#ifdef	IDE_DEBUG
#define	PRINTF(fmt,args...)	printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif

#if (CONFIG_COMMANDS & CFG_CMD_IDE)

/* Timings for IDE Interface
 *
 * SETUP / LENGTH / HOLD - cycles valid for 50 MHz clk
 * 70      165      30     PIO-Mode 0, [ns]
 *  4        9       2                 [Cycles]
 * 50      125      20     PIO-Mode 1, [ns]
 *  3        7       2                 [Cycles]
 * 30      100      15     PIO-Mode 2, [ns]
 *  2        6       1                 [Cycles]
 * 30       80      10     PIO-Mode 3, [ns]
 *  2        5       1                 [Cycles]
 * 25       70      10     PIO-Mode 4, [ns]
 *  2        4       1                 [Cycles]
 */

const static pio_config_t pio_config_ns [IDE_MAX_PIO_MODE+1] =
{
    /*  Setup  Length  Hold  */
	{ 70,   165,    30 },		/* PIO-Mode 0, [ns]	*/
	{ 50,   125,    20 },		/* PIO-Mode 1, [ns]	*/
	{ 30,   101,    15 },		/* PIO-Mode 2, [ns]	*/
	{ 30,    80,    10 },		/* PIO-Mode 3, [ns]	*/
	{ 25,    70,    10 },		/* PIO-Mode 4, [ns]	*/
};

static pio_config_t pio_config_clk [IDE_MAX_PIO_MODE+1];

#ifndef	CFG_PIO_MODE
#define	CFG_PIO_MODE	0		/* use a relaxed default */
#endif
static int pio_mode = CFG_PIO_MODE;

/* Make clock cycles and always round up */

#define PCMCIA_MK_CLKS( t, T ) (( (t) * (T) + 999U ) / 1000U )

/* ------------------------------------------------------------------------- */

/* Current I/O Device	*/
static int curr_device = -1;

/* Current offset for IDE0 / IDE1 bus access	*/
#ifdef CONFIG_BAB750
extern ulong bus_offset[];
#else
static ulong bus_offset[CFG_IDE_MAXBUS] = {
	CFG_ATA_IDE0_OFFSET,
#if CFG_IDE_MAXBUS > 1
	CFG_ATA_IDE1_OFFSET,
#endif
};
#endif

//#define	ATA_CURR_BASE(dev)	(CFG_ATA_BASE_ADDR+bus_offset[IDE_BUS(dev)])
#define	ATA_CURR_BASE(dev)	(bus_offset[IDE_BUS(dev)])

static int	    ide_bus_ok[CFG_IDE_MAXBUS];

static  block_dev_desc_t ide_dev_desc[CFG_IDE_MAXDEVICE];
/* ------------------------------------------------------------------------- */

#ifdef CONFIG_IDE_LED
static void  ide_led   (uchar led, uchar status);
#else
#define ide_led(a,b)	/* dummy */
#endif

#ifdef CONFIG_IDE_RESET
static void  ide_reset (void);
#else
#define ide_reset()	/* dummy */
#endif

static void  ide_ident (block_dev_desc_t *dev_desc);
static uchar ide_wait  (int dev, ulong t);

#ifdef CONFIG_PIP405
#define IDE_TIME_OUT 2000 /* 2 sec timeout */
#else
#define IDE_TIME_OUT 500 /* 500ms timeout */
#endif

#define ATAPI_TIME_OUT 7000 /* 7 sec timeout (5 sec seems to work...) */


static void __inline__ outb(int dev, int port, unsigned char val);
static unsigned char __inline__ inb(int dev, int port);
static void input_swap_data(int dev, ulong *sect_buf, int words);
static void input_data(int dev, ulong *sect_buf, int words);
static void output_data(int dev, ulong *sect_buf, int words);
static void ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len);


#ifdef CONFIG_ATAPI
static void	atapi_inquiry(block_dev_desc_t *dev_desc);
ulong atapi_read (int device, ulong blknr, ulong blkcnt, ulong *buffer);
#endif


#ifdef CONFIG_IDE_PCMCIA
static void set_pcmcia_timing (int pmode);
#else
#define set_pcmcia_timing(a)	/* dummy */
#endif

/* ------------------------------------------------------------------------- */

int do_ide (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
{
    int rcode = 0;

    switch (argc) {
    case 0:
    case 1:
	printf ("Usage:\n%s\n", cmdtp->usage);
	return 1;
    case 2:
	if (strncmp(argv[1],"res",3) == 0) {
		puts ("\nReset IDE"
#ifdef CONFIG_IDE_PCMCIA
			" on PCMCIA " PCMCIA_SLOT_MSG
#endif
			": ");

		ide_init(bd);
		return 0;
	} else if (strncmp(argv[1],"inf",3) == 0) {
		int i;

		putc ('\n');

		for (i=0; i<CFG_IDE_MAXDEVICE; ++i) {
			if(ide_dev_desc[i].type==DEV_TYPE_UNKNOWN)
				continue; /* list only known devices */
			printf ("IDE device %d: ", i);
			dev_print(&ide_dev_desc[i]);
		}
		return 0;

	} else if (strncmp(argv[1],"dev",3) == 0) {
		if ((curr_device < 0) || (curr_device >= CFG_IDE_MAXDEVICE)) {
			puts ("\nno IDE devices available\n");
			return 1;
		}
		printf ("\nIDE device %d: ", curr_device);
		dev_print(&ide_dev_desc[curr_device]);
		return 0;
	} else if (strncmp(argv[1],"part",4) == 0) {
		int dev, ok;

		for (ok=0, dev=0; dev<CFG_IDE_MAXDEVICE; ++dev) {
			if (ide_dev_desc[dev].part_type!=PART_TYPE_UNKNOWN) {
				++ok;
				if (dev)
					putc ('\n');
				print_part(&ide_dev_desc[dev]);
			}
		}
		if (!ok) {
			puts ("\nno IDE devices available\n");
			rcode ++;
		}
		return rcode;
	}
	printf ("Usage:\n%s\n", cmdtp->usage);
	return 1;
    case 3:
	if (strncmp(argv[1],"dev",3) == 0) {
		int dev = (int)simple_strtoul(argv[2], NULL, 10);

		printf ("\nIDE device %d: ", dev);
		if (dev >= CFG_IDE_MAXDEVICE) {
			puts ("unknown device\n");
			return 1;
		}
		dev_print(&ide_dev_desc[dev]);
		/*ide_print (dev);*/

		if (ide_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
			return 1;
		}

		curr_device = dev;

		puts ("... is now current device\n");

		return 0;
	} else if (strncmp(argv[1],"part",4) == 0) {
		int dev = (int)simple_strtoul(argv[2], NULL, 10);

		if (ide_dev_desc[dev].part_type!=PART_TYPE_UNKNOWN) {
				print_part(&ide_dev_desc[dev]);
		} else {
			printf ("\nIDE device %d not available\n", dev);
			rcode = 1;
		}
		return rcode;
#if 0
	} else if (strncmp(argv[1],"pio",4) == 0) {
		int mode = (int)simple_strtoul(argv[2], NULL, 10);

		if ((mode >= 0) && (mode <= IDE_MAX_PIO_MODE)) {
			puts ("\nSetting ");
			pio_mode = mode;
			ide_init (bd);
		} else {
			printf ("\nInvalid PIO mode %d (0 ... %d only)\n",
				mode, IDE_MAX_PIO_MODE);
		}
		return;
#endif
	}

	printf ("Usage:\n%s\n", cmdtp->usage);
	return 1;
    default:
	/* at least 4 args */

	if (strcmp(argv[1],"read") == 0) {
		ulong addr = simple_strtoul(argv[2], NULL, 16);
		ulong blk  = simple_strtoul(argv[3], NULL, 16);
		ulong cnt  = simple_strtoul(argv[4], NULL, 16);
		ulong n;

		printf ("\nIDE read: device %d block # %ld, count %ld ... ",
			curr_device, blk, cnt);

		n = ide_dev_desc[curr_device].block_read (curr_device, blk, cnt, (ulong *)addr);
/*		n = ide_read (curr_device, blk, cnt, (ulong *)addr); */

		printf ("%ld blocks read: %s\n",
			n, (n==cnt) ? "OK" : "ERROR");
		if (n==cnt) {
			return 0;
		} else {
			return 1;
		}	
	} else if (strcmp(argv[1],"write") == 0) {
		ulong addr = simple_strtoul(argv[2], NULL, 16);
		ulong blk  = simple_strtoul(argv[3], NULL, 16);
		ulong cnt  = simple_strtoul(argv[4], NULL, 16);
		ulong n;

		printf ("\nIDE write: device %d block # %ld, count %ld ... ",
			curr_device, blk, cnt);

		n = ide_write (curr_device, blk, cnt, (ulong *)addr);

		printf ("%ld blocks written: %s\n",
			n, (n==cnt) ? "OK" : "ERROR");
		if (n==cnt) {
			return 0;
		} else {
			return 1;
		}
	} else {
		printf ("Usage:\n%s\n", cmdtp->usage);
		rcode = 1;
	}

	return rcode;
    }
}

int do_diskboot (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
{
	char *boot_device = NULL;
	char *ep;
	int dev, part=0;
	ulong cnt;
	ulong addr;
	disk_partition_t info;
	image_header_t *hdr;
	int rcode = 0;

	switch (argc) {
	case 1:
		addr = CFG_LOAD_ADDR;
		boot_device = getenv (bd, "bootdevice");
		break;
	case 2:
		addr = simple_strtoul(argv[1], NULL, 16);
		boot_device = getenv (bd, "bootdevice");
		break;
	case 3:
		addr = simple_strtoul(argv[1], NULL, 16);
		boot_device = argv[2];
		break;
	default:
		printf ("Usage:\n%s\n", cmdtp->usage);
		return 1;
	}

	if (!boot_device) {
		puts ("\n** No boot device **\n");
		return 1;
	}

	dev = simple_strtoul(boot_device, &ep, 16);

	if (ide_dev_desc[dev].type==DEV_TYPE_UNKNOWN) {
		printf ("\n** Device %d not available\n", dev);
		return 1;
	}

	if (*ep) {
		if (*ep != ':') {
			puts ("\n** Invalid boot device, use `dev[:part]' **\n");
			return 1;
		}
		part = simple_strtoul(++ep, NULL, 16);
	}
	if (get_partition_info (&ide_dev_desc[dev], part, &info)) {
		return 1;
	}
	if (strncmp(info.type, BOOT_PART_TYPE, sizeof(info.type)) != 0) {
		printf ("\n** Invalid partition type \"%.32s\""
			" (expect \"" BOOT_PART_TYPE "\")\n",
			info.type);
		return 1;
	}

	printf ("\nLoading from IDE device %d, partition %d: "
		"Name: %.32s  Type: %.32s\n",
		dev, part, info.name, info.type);

	PRINTF ("First Block: %ld,  # of blocks: %ld, Block Size: %ld\n",
		info.start, info.size, info.blksz);

	if (ide_dev_desc[dev].block_read (dev, info.start, 1, (ulong *)addr) != 1) {
		printf ("** Read error on %d:%d\n", dev, part);
		return 1;
	}

	hdr = (image_header_t *)addr;

	if (SWAP32(hdr->ih_magic) == IH_MAGIC) {

		print_image_hdr (hdr);

		cnt = (SWAP32(hdr->ih_size) + sizeof(image_header_t));
		cnt += info.blksz - 1;
		cnt /= info.blksz;
		cnt -= 1;
	} else {
		printf("\n** Bad Magic Number **\n");
		return 1;
	}

	if (ide_dev_desc[dev].block_read (dev, info.start+1, cnt,
		      (ulong *)(addr+info.blksz)) != cnt) {
		printf ("** Read error on %d:%d\n", dev, part);
		return 1;
	}


	/* Loading ok, update default load address */

	load_addr = addr;

	/* Check if we should attempt an auto-start */
	if (((ep = getenv(bd, "autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
		char *local_args[2];
		extern int do_bootm (cmd_tbl_t *, bd_t *, int, int, char *[]);

		local_args[0] = argv[0];
		local_args[1] = NULL;

		printf ("Automatic boot of image at addr 0x%08lX ...\n", addr);

		do_bootm (cmdtp, bd, 0, 1, local_args);
		rcode = 1;
	}
	return rcode;
}

/* ------------------------------------------------------------------------- */

void ide_init (bd_t *bd)
{
#ifdef CONFIG_IDE_PCMCIA
	volatile immap_t *immr = (immap_t *)CFG_IMMR;
	volatile pcmconf8xx_t *pcmp = &(immr->im_pcmcia);
#endif
	unsigned char c;
	int i, bus;

#ifdef CONFIG_IDE_PCCARD
	extern int pcmcia_on (void);

# if defined(CONFIG_WATCHDOG)
	watchdog_reset ();
# endif	/* CONFIG_WATCHDOG */
	/* initialize the PCMCIA IDE adapter card */
	if (pcmcia_on())
		return;
	udelay (1000000);	/* 1 s */
#endif	/* CONFIG_IDE_PCCARD */

#if defined(CONFIG_WATCHDOG)
	watchdog_reset ();
#endif	/* CONFIG_WATCHDOG */


#define WE_DONT_HAVE_BD_BI_BUSFREQ 100000

	/* Initialize PIO timing tables */
	for (i=0; i <= IDE_MAX_PIO_MODE; ++i) {
	    pio_config_clk[i].t_setup  = PCMCIA_MK_CLKS(pio_config_ns[i].t_setup,
							    WE_DONT_HAVE_BD_BI_BUSFREQ);
	    pio_config_clk[i].t_length = PCMCIA_MK_CLKS(pio_config_ns[i].t_length,