common/cmd_ide.c

/*
 * (C) Copyright 2000-2005
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * 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 <common.h>
#include <config.h>
#include <watchdog.h>
#include <command.h>
#include <image.h>
#include <asm/byteorder.h>
#include <asm/io.h>

#if defined(CONFIG_IDE_8xx_DIRECT) || defined(CONFIG_IDE_PCMCIA)
# include <pcmcia.h>
#endif

#ifdef CONFIG_8xx
# include <mpc8xx.h>
#endif

#ifdef CONFIG_MPC5xxx
#include <mpc5xxx.h>
#endif

#include <ide.h>
#include <ata.h>

#ifdef CONFIG_STATUS_LED
# include <status_led.h>
#endif

#ifndef __PPC__
#include <asm/io.h>
#endif

#ifdef CONFIG_IDE_8xx_DIRECT
DECLARE_GLOBAL_DATA_PTR;
#endif

#ifdef __PPC__
# define EIEIO		__asm__ volatile ("eieio")
# define SYNC		__asm__ volatile ("sync")
#else
# define EIEIO		/* nothing */
# define SYNC		/* nothing */
#endif

#ifdef CONFIG_IDE_8xx_DIRECT
/* 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 )

#endif /* CONFIG_IDE_8xx_DIRECT */

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

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

/* Current offset for IDE0 / IDE1 bus access	*/
ulong ide_bus_offset[CFG_IDE_MAXBUS] = {
#if defined(CFG_ATA_IDE0_OFFSET)
	CFG_ATA_IDE0_OFFSET,
#endif
#if defined(CFG_ATA_IDE1_OFFSET) && (CFG_IDE_MAXBUS > 1)
	CFG_ATA_IDE1_OFFSET,
#endif
};


#ifndef CONFIG_AMIGAONEG3SE
static int ide_bus_ok[CFG_IDE_MAXBUS];
#else
static int ide_bus_ok[CFG_IDE_MAXBUS] = {0,};
#endif

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

#ifdef CONFIG_IDE_LED
#if !defined(CONFIG_KUP4K) &&  !defined(CONFIG_KUP4X) &&!defined(CONFIG_BMS2003) &&!defined(CONFIG_CPC45)
static void  ide_led   (uchar led, uchar status);
#else
extern void  ide_led   (uchar led, uchar status);
#endif
#else
#ifndef CONFIG_AMIGAONEG3SE
#define ide_led(a,b)	/* dummy */
#else
extern void ide_led(uchar led, uchar status);
#define LED_IDE1  1
#define LED_IDE2  2
#define CONFIG_IDE_LED 1
#define DEVICE_LED(x) 1
#endif
#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);

#define IDE_TIME_OUT	2000	/* 2 sec timeout */

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

#define IDE_SPIN_UP_TIME_OUT 5000 /* 5 sec spin-up timeout */

void inline ide_outb(int dev, int port, unsigned char val);
unsigned char inline ide_inb(int dev, int port);
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);

#ifndef CFG_ATA_PORT_ADDR
#define CFG_ATA_PORT_ADDR(port) (port)
#endif

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


#ifdef CONFIG_IDE_8xx_DIRECT
static void set_pcmcia_timing (int pmode);
#endif

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

int do_ide (cmd_tbl_t *cmdtp, 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_8xx_DIRECT
			" on PCMCIA " PCMCIA_SLOT_MSG
#endif
			": ");

		ide_init ();
		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 ();
		} 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 cnt  = simple_strtoul(argv[4], NULL, 16);
		ulong n;
#ifdef CFG_64BIT_STRTOUL
		lbaint_t blk  = simple_strtoull(argv[3], NULL, 16);

		printf ("\nIDE read: device %d block # %qd, count %ld ... ",
			curr_device, blk, cnt);
#else
		lbaint_t blk  = simple_strtoul(argv[3], NULL, 16);

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

		n = ide_dev_desc[curr_device].block_read (curr_device,
							  blk, cnt,
							  (ulong *)addr);
		/* flush cache after read */
		flush_cache (addr, cnt*ide_dev_desc[curr_device].blksz);

		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 cnt  = simple_strtoul(argv[4], NULL, 16);
		ulong n;
#ifdef CFG_64BIT_STRTOUL
		lbaint_t blk  = simple_strtoull(argv[3], NULL, 16);

		printf ("\nIDE write: device %d block # %qd, count %ld ... ",
			curr_device, blk, cnt);
#else
		lbaint_t blk  = simple_strtoul(argv[3], NULL, 16);

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

		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, int flag, int argc, char *argv[])
{
	char *boot_device = NULL;
	char *ep;
	int dev, part = 0;
	ulong addr, cnt;
	disk_partition_t info;
	image_header_t *hdr;
	int rcode = 0;
#if defined(CONFIG_FIT)
	const void *fit_hdr;
#endif

	show_boot_progress (41);
	switch (argc) {
	case 1:
		addr = CFG_LOAD_ADDR;
		boot_device = getenv ("bootdevice");
		break;
	case 2:
		addr = simple_strtoul(argv[1], NULL, 16);
		boot_device = getenv ("bootdevice");
		break;
	case 3:
		addr = simple_strtoul(argv[1], NULL, 16);
		boot_device = argv[2];
		break;
	default:
		printf ("Usage:\n%s\n", cmdtp->usage);
		show_boot_progress (-42);
		return 1;
	}
	show_boot_progress (42);

	if (!boot_device) {
		puts ("\n** No boot device **\n");
		show_boot_progress (-43);
		return 1;
	}
	show_boot_progress (43);

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

	if (ide_dev_desc[dev].type==DEV_TYPE_UNKNOWN) {
		printf ("\n** Device %d not available\n", dev);
		show_boot_progress (-44);
		return 1;
	}
	show_boot_progress (44);

	if (*ep) {
		if (*ep != ':') {
			puts ("\n** Invalid boot device, use `dev[:part]' **\n");
			show_boot_progress (-45);
			return 1;
		}
		part = simple_strtoul(++ep, NULL, 16);
	}
	show_boot_progress (45);
	if (get_partition_info (&ide_dev_desc[dev], part, &info)) {
		show_boot_progress (-46);
		return 1;
	}
	show_boot_progress (46);
	if ((strncmp((char *)info.type, BOOT_PART_TYPE, sizeof(info.type)) != 0) &&
	    (strncmp((char *)info.type, BOOT_PART_COMP, sizeof(info.type)) != 0)) {
		printf ("\n** Invalid partition type \"%.32s\""
			" (expect \"" BOOT_PART_TYPE "\")\n",
			info.type);
		show_boot_progress (-47);
		return 1;
	}
	show_boot_progress (47);

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

	debug ("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);
		show_boot_progress (-48);
		return 1;
	}
	show_boot_progress (48);

	switch (genimg_get_format ((void *)addr)) {
	case IMAGE_FORMAT_LEGACY:
		hdr = (image_header_t *)addr;

		show_boot_progress (49);

		if (!image_check_hcrc (hdr)) {
			puts ("\n** Bad Header Checksum **\n");
			show_boot_progress (-50);
			return 1;
		}
		show_boot_progress (50);

		image_print_contents (hdr);

		cnt = image_get_image_size (hdr);
		break;
#if defined(CONFIG_FIT)
	case IMAGE_FORMAT_FIT:
		fit_hdr = (const void *)addr;
		if (!fit_check_format (fit_hdr)) {
			show_boot_progress (-140);
			puts ("** Bad FIT image format\n");
			return 1;
		}
		show_boot_progress (141);
		puts ("Fit image detected...\n");

		cnt = fit_get_size (fit_hdr);
		break;
#endif
	default:
		show_boot_progress (-49);
		puts ("** Unknown image type\n");
		return 1;
	}

	cnt += info.blksz - 1;
	cnt /= info.blksz;
	cnt -= 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);
		show_boot_progress (-51);
		return 1;
	}
	show_boot_progress (51);

#if defined(CONFIG_FIT)
	/* This cannot be done earlier, we need complete FIT image in RAM first */
	if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT)
		fit_print_contents ((const void *)addr);
#endif

	/* Loading ok, update default load address */

	load_addr = addr;

	/* Check if we should attempt an auto-start */
	if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
		char *local_args[2];
		extern int do_bootm (cmd_tbl_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, 0, 1, local_args);
		rcode = 1;
	}
	return rcode;
}

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

void ide_init (void)
{

#ifdef CONFIG_IDE_8xx_DIRECT
	volatile immap_t *immr = (immap_t *)CFG_IMMR;
	volatile pcmconf8xx_t *pcmp = &(immr->im_pcmcia);
#endif
	unsigned char c;
	int i, bus;
#if defined(CONFIG_AMIGAONEG3SE) || defined(CONFIG_SC3)
	unsigned int ata_reset_time = ATA_RESET_TIME;
	char *s;
#endif
#ifdef CONFIG_AMIGAONEG3SE
	unsigned int max_bus_scan;
#endif
#ifdef CONFIG_IDE_8xx_PCCARD
	extern int pcmcia_on (void);
	extern int ide_devices_found; /* Initialized in check_ide_device() */
#endif	/* CONFIG_IDE_8xx_PCCARD */

#ifdef CONFIG_IDE_PREINIT
	extern int ide_preinit (void);
	WATCHDOG_RESET();

	if (ide_preinit ()) {
		puts ("ide_preinit failed\n");
		return;
	}
#endif	/* CONFIG_IDE_PREINIT */

#ifdef CONFIG_IDE_8xx_PCCARD
	extern int pcmcia_on (void);
	extern int ide_devices_found; /* Initialized in check_ide_device() */

	WATCHDOG_RESET();

	ide_devices_found = 0;
	/* initialize the PCMCIA IDE adapter card */
	pcmcia_on();
	if (!ide_devices_found)
		return;
	udelay (1000000);	/* 1 s */
#endif	/* CONFIG_IDE_8xx_PCCARD */

	WATCHDOG_RESET();

#ifdef CONFIG_IDE_8xx_DIRECT
	/* 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,
								gd->bus_clk);
		pio_config_clk[i].t_length = PCMCIA_MK_CLKS(pio_config_ns[i].t_length,
								gd->bus_clk);
		pio_config_clk[i].t_hold   = PCMCIA_MK_CLKS(pio_config_ns[i].t_hold,
								gd->bus_clk);
		debug ( "PIO Mode %d: setup=%2d ns/%d clk"
			"  len=%3d ns/%d clk"
			"  hold=%2d ns/%d clk\n",
			i,
			pio_config_ns[i].t_setup,  pio_config_clk[i].t_setup,
			pio_config_ns[i].t_length, pio_config_clk[i].t_length,
			pio_config_ns[i].t_hold,   pio_config_clk[i].t_hold);
	}
#endif /* CONFIG_IDE_8xx_DIRECT */

	/* Reset the IDE just to be sure.
	 * Light LED's to show
	 */
	ide_led ((LED_IDE1 | LED_IDE2), 1);		/* LED's on	*/
	ide_reset (); /* ATAPI Drives seems to need a proper IDE Reset */

#ifdef CONFIG_IDE_8xx_DIRECT
	/* PCMCIA / IDE initialization for common mem space */
	pcmp->pcmc_pgcrb = 0;

	/* start in PIO mode 0 - most relaxed timings */
	pio_mode = 0;
	set_pcmcia_timing (pio_mode);
#endif /* CONFIG_IDE_8xx_DIRECT */

	/*
	 * Wait for IDE to get ready.
	 * According to spec, this can take up to 31 seconds!
	 */
#ifndef CONFIG_AMIGAONEG3SE
	for (bus=0; bus<CFG_IDE_MAXBUS; ++bus) {
		int dev = bus * (CFG_IDE_MAXDEVICE / CFG_IDE_MAXBUS);
#else
	s = getenv("ide_maxbus");
	if (s)
		max_bus_scan = simple_strtol(s, NULL, 10);
	else
		max_bus_scan = CFG_IDE_MAXBUS;

	for (bus=0; bus<max_bus_scan; ++bus) {
		int dev = bus * (CFG_IDE_MAXDEVICE / max_bus_scan);
#endif

#ifdef CONFIG_IDE_8xx_PCCARD
		/* Skip non-ide devices from probing */
		if ((ide_devices_found & (1 << bus)) == 0) {
			ide_led ((LED_IDE1 | LED_IDE2), 0); /* LED's off */
			continue;
		}
#endif
		printf ("Bus %d: ", bus);

		ide_bus_ok[bus] = 0;

		/* Select device
		 */
		udelay (100000);		/* 100 ms */
		ide_outb (dev, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(dev));
		udelay (100000);		/* 100 ms */
#if defined(CONFIG_AMIGAONEG3SE) || defined(CONFIG_SC3)
		if ((s = getenv("ide_reset_timeout")) != NULL)
			ata_reset_time = simple_strtol(s, NULL, 10);
#endif
		i = 0;
		do {
			udelay (10000);		/* 10 ms */

			c = ide_inb (dev, ATA_STATUS);
			i++;
#if defined(CONFIG_AMIGAONEG3SE) || defined(CONFIG_SC3)
			if (i > (ata_reset_time * 100)) {
#else
			if (i > (ATA_RESET_TIME * 100)) {
#endif
				puts ("** Timeout **\n");
				ide_led ((LED_IDE1 | LED_IDE2), 0); /* LED's off */
#ifdef CONFIG_AMIGAONEG3SE
				/* If this is the second bus, the first one was OK */
				if (bus != 0) {
					ide_bus_ok[bus] = 0;
					goto skip_bus;
				}
#endif
				return;
			}
			if ((i >= 100) && ((i%100)==0)) {
				putc ('.');
			}
		} while (c & ATA_STAT_BUSY);

		if (c & (ATA_STAT_BUSY | ATA_STAT_FAULT)) {
			puts ("not available  ");
			debug ("Status = 0x%02X ", c);
#ifndef CONFIG_ATAPI /* ATAPI Devices do not set DRDY */
		} else  if ((c & ATA_STAT_READY) == 0) {
			puts ("not available  ");
			debug ("Status = 0x%02X ", c);
#endif
		} else {
			puts ("OK ");
			ide_bus_ok[bus] = 1;
		}
		WATCHDOG_RESET();
	}

#ifdef CONFIG_AMIGAONEG3SE
      skip_bus:
#endif
	putc ('\n');

	ide_led ((LED_IDE1 | LED_IDE2), 0);	/* LED's off	*/

	curr_device = -1;
	for (i=0; i<CFG_IDE_MAXDEVICE; ++i) {
#ifdef CONFIG_IDE_LED
		int led = (IDE_BUS(i) == 0) ? LED_IDE1 : LED_IDE2;
#endif
		ide_dev_desc[i].type=DEV_TYPE_UNKNOWN;
		ide_dev_desc[i].if_type=IF_TYPE_IDE;
		ide_dev_desc[i].dev=i;
		ide_dev_desc[i].part_type=PART_TYPE_UNKNOWN;
		ide_dev_desc[i].blksz=0;
		ide_dev_desc[i].lba=0;
		ide_dev_desc[i].block_read=ide_read;
		if (!ide_bus_ok[IDE_BUS(i)])
			continue;
		ide_led (led, 1);		/* LED on	*/
		ide_ident(&ide_dev_desc[i]);
		ide_led (led, 0);		/* LED off	*/
		dev_print(&ide_dev_desc[i]);
/*		ide_print (i); */
		if ((ide_dev_desc[i].lba > 0) && (ide_dev_desc[i].blksz > 0)) {
			init_part (&ide_dev_desc[i]);			/* initialize partition type */
			if (curr_device < 0)
				curr_device = i;
		}
	}
	WATCHDOG_RESET();
}

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

block_dev_desc_t * ide_get_dev(int dev)
{
	return (dev < CFG_IDE_MAXDEVICE) ? &ide_dev_desc[dev] : NULL;
}


#ifdef CONFIG_IDE_8xx_DIRECT

static void
set_pcmcia_timing (int pmode)
{
	volatile immap_t *immr = (immap_t *)CFG_IMMR;
	volatile pcmconf8xx_t *pcmp = &(immr->im_pcmcia);
	ulong timings;

	debug ("Set timing for PIO Mode %d\n", pmode);

	timings = PCMCIA_SHT(pio_config_clk[pmode].t_hold)
		| PCMCIA_SST(pio_config_clk[pmode].t_setup)
		| PCMCIA_SL (pio_config_clk[pmode].t_length)
		;

	/* IDE 0
	 */
	pcmp->pcmc_pbr0 = CFG_PCMCIA_PBR0;
	pcmp->pcmc_por0 = CFG_PCMCIA_POR0
#if (CFG_PCMCIA_POR0 != 0)
			| timings
#endif
			;
	debug ("PBR0: %08x  POR0: %08x\n", pcmp->pcmc_pbr0, pcmp->pcmc_por0);

	pcmp->pcmc_pbr1 = CFG_PCMCIA_PBR1;
	pcmp->pcmc_por1 = CFG_PCMCIA_POR1
#if (CFG_PCMCIA_POR1 != 0)
			| timings
#endif
			;
	debug ("PBR1: %08x  POR1: %08x\n", pcmp->pcmc_pbr1, pcmp->pcmc_por1);

	pcmp->pcmc_pbr2 = CFG_PCMCIA_PBR2;
	pcmp->pcmc_por2 = CFG_PCMCIA_POR2
#if (CFG_PCMCIA_POR2 != 0)
			| timings
#endif
			;
	debug ("PBR2: %08x  POR2: %08x\n", pcmp->pcmc_pbr2, pcmp->pcmc_por2);

	pcmp->pcmc_pbr3 = CFG_PCMCIA_PBR3;
	pcmp->pcmc_por3 = CFG_PCMCIA_POR3
#if (CFG_PCMCIA_POR3 != 0)
			| timings
#endif
			;
	debug ("PBR3: %08x  POR3: %08x\n", pcmp->pcmc_pbr3, pcmp->pcmc_por3);

	/* IDE 1
	 */
	pcmp->pcmc_pbr4 = CFG_PCMCIA_PBR4;
	pcmp->pcmc_por4 = CFG_PCMCIA_POR4
#if (CFG_PCMCIA_POR4 != 0)
			| timings
#endif
			;
	debug ("PBR4: %08x  POR4: %08x\n", pcmp->pcmc_pbr4, pcmp->pcmc_por4);

	pcmp->pcmc_pbr5 = CFG_PCMCIA_PBR5;
	pcmp->pcmc_por5 = CFG_PCMCIA_POR5
#if (CFG_PCMCIA_POR5 != 0)
			| timings
#endif
			;
	debug ("PBR5: %08x  POR5: %08x\n", pcmp->pcmc_pbr5, pcmp->pcmc_por5);

	pcmp->pcmc_pbr6 = CFG_PCMCIA_PBR6;
	pcmp->pcmc_por6 = CFG_PCMCIA_POR6
#if (CFG_PCMCIA_POR6 != 0)
			| timings
#endif
			;
	debug ("PBR6: %08x  POR6: %08x\n", pcmp->pcmc_pbr6, pcmp->pcmc_por6);

	pcmp->pcmc_pbr7 = CFG_PCMCIA_PBR7;
	pcmp->pcmc_por7 = CFG_PCMCIA_POR7
#if (CFG_PCMCIA_POR7 != 0)
			| timings
#endif
			;
	debug ("PBR7: %08x  POR7: %08x\n", pcmp->pcmc_pbr7, pcmp->pcmc_por7);

}

#endif	/* CONFIG_IDE_8xx_DIRECT */

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

void inline
__ide_outb(int dev, int port, unsigned char val)
{
	debug ("ide_outb (dev= %d, port= 0x%x, val= 0x%02x) : @ 0x%08lx\n",
		dev, port, val, (ATA_CURR_BASE(dev)+CFG_ATA_PORT_ADDR(port)));
	outb(val, (ATA_CURR_BASE(dev)+CFG_ATA_PORT_ADDR(port)));
}
void inline ide_outb (int dev, int port, unsigned char val)
		__attribute__((weak, alias("__ide_outb")));

unsigned char inline
__ide_inb(int dev, int port)
{
	uchar val;
	val = inb((ATA_CURR_BASE(dev)+CFG_ATA_PORT_ADDR(port)));
	debug ("ide_inb (dev= %d, port= 0x%x) : @ 0x%08lx -> 0x%02x\n",
		dev, port, (ATA_CURR_BASE(dev)+CFG_ATA_PORT_ADDR(port)), val);
	return val;
}
unsigned char inline ide_inb(int dev, int port)
			__attribute__((weak, alias("__ide_inb")));

#ifdef __PPC__
# ifdef CONFIG_AMIGAONEG3SE
static void
output_data_short(int dev, ulong *sect_buf, int words)
{
	ushort	*dbuf;
	volatile ushort	*pbuf;

	pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG);
	dbuf = (ushort *)sect_buf;
	while (words--) {
		EIEIO;
		*pbuf = *dbuf++;
		EIEIO;
	}

	if (words&1)
		*pbuf = 0;
}
# endif	/* CONFIG_AMIGAONEG3SE */
#endif /* __PPC_ */

/* We only need to swap data if we are running on a big endian cpu. */
/* But Au1x00 cpu:s already swaps data in big endian mode! */
#if defined(__LITTLE_ENDIAN) || ( defined(CONFIG_AU1X00) && !defined(CONFIG_GTH2) )
#define input_swap_data(x,y,z) input_data(x,y,z)
#else
static void
input_swap_data(int dev, ulong *sect_buf, int words)
{
#if defined(CONFIG_HMI10) || defined(CONFIG_CPC45)
	uchar i;
	volatile uchar *pbuf_even = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_EVEN);
	volatile uchar *pbuf_odd  = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_ODD);
	ushort  *dbuf = (ushort *)sect_buf;

	while (words--) {
		for (i=0; i<2; i++) {
			*(((uchar *)(dbuf)) + 1) = *pbuf_even;
			*(uchar *)dbuf = *pbuf_odd;
			dbuf+=1;
		}
	}
#else
	volatile ushort	*pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG);
	ushort	*dbuf = (ushort *)sect_buf;

	debug("in input swap data base for read is %lx\n", (unsigned long) pbuf);

	while (words--) {
#ifdef __MIPS__
		*dbuf++ = swab16p((u16*)pbuf);
		*dbuf++ = swab16p((u16*)pbuf);
#elif defined(CONFIG_PCS440EP)
		*dbuf++ = *pbuf;
		*dbuf++ = *pbuf;
#else
		*dbuf++ = ld_le16(pbuf);
		*dbuf++ = ld_le16(pbuf);
#endif /* !MIPS */
	}
#endif
}
#endif	/* __LITTLE_ENDIAN || CONFIG_AU1X00 */


#if defined(__PPC__) || defined(CONFIG_PXA_PCMCIA) || defined(CONFIG_SH)
static void
output_data(int dev, ulong *sect_buf, int words)
{
#if defined(CONFIG_HMI10) || defined(CONFIG_CPC45)
	uchar	*dbuf;
	volatile uchar	*pbuf_even;
	volatile uchar	*pbuf_odd;

	pbuf_even = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_EVEN);
	pbuf_odd  = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_ODD);
	dbuf = (uchar *)sect_buf;
	while (words--) {
		EIEIO;
		*pbuf_even = *dbuf++;
		EIEIO;
		*pbuf_odd = *dbuf++;
		EIEIO;
		*pbuf_even = *dbuf++;
		EIEIO;
		*pbuf_odd = *dbuf++;
	}
#else
	ushort	*dbuf;
	volatile ushort	*pbuf;

	pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG);
	dbuf = (ushort *)sect_buf;
	while (words--) {
#if defined(CONFIG_PCS440EP)
		/* not tested, because CF was write protected */
		EIEIO;
		*pbuf = ld_le16(dbuf++);
		EIEIO;
		*pbuf = ld_le16(dbuf++);
#else
		EIEIO;
		*pbuf = *dbuf++;
		EIEIO;
		*pbuf = *dbuf++;
#endif
	}
#endif
}
#else	/* ! __PPC__ */
static void
output_data(int dev, ulong *sect_buf, int words)
{
	outsw(ATA_CURR_BASE(dev)+ATA_DATA_REG, sect_buf, words<<1);
}
#endif	/* __PPC__ */

#if defined(__PPC__) || defined(CONFIG_PXA_PCMCIA) || defined(CONFIG_SH)
static void
input_data(int dev, ulong *sect_buf, int words)
{
#if defined(CONFIG_HMI10) || defined(CONFIG_CPC45)
	uchar	*dbuf;
	volatile uchar	*pbuf_even;
	volatile uchar	*pbuf_odd;

	pbuf_even = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_EVEN);
	pbuf_odd  = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_ODD);
	dbuf = (uchar *)sect_buf;
	while (words--) {
		*dbuf++ = *pbuf_even;
		EIEIO;
		SYNC;
		*dbuf++ = *pbuf_odd;
		EIEIO;
		SYNC;
		*dbuf++ = *pbuf_even;
		EIEIO;
		SYNC;
		*dbuf++ = *pbuf_odd;
		EIEIO;
		SYNC;
	}
#else
	ushort	*dbuf;
	volatile ushort	*pbuf;

	pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG);
	dbuf = (ushort *)sect_buf;

	debug("in input data base for read is %lx\n", (unsigned long) pbuf);

	while (words--) {
#if defined(CONFIG_PCS440EP)
		EIEIO;
		*dbuf++ = ld_le16(pbuf);
		EIEIO;
		*dbuf++ = ld_le16(pbuf);
#else
		EIEIO;
		*dbuf++ = *pbuf;
		EIEIO;
		*dbuf++ = *pbuf;
#endif
	}
#endif
}
#else	/* ! __PPC__ */
static void
input_data(int dev, ulong *sect_buf, int words)
{
	insw(ATA_CURR_BASE(dev)+ATA_DATA_REG, sect_buf, words << 1);
}

#endif	/* __PPC__ */

#ifdef CONFIG_AMIGAONEG3SE
static void
input_data_short(int dev, ulong *sect_buf, int words)
{
	ushort	*dbuf;
	volatile ushort	*pbuf;

	pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG);
	dbuf = (ushort *)sect_buf;
	while (words--) {
		EIEIO;
		*dbuf++ = *pbuf;
		EIEIO;
	}

	if (words&1) {
		ushort dummy;
		dummy = *pbuf;
	}
}
#endif

/* -------------------------------------------------------------------------
 */
static void ide_ident (block_dev_desc_t *dev_desc)
{
	ulong iobuf[ATA_SECTORWORDS];
	unsigned char c;
	hd_driveid_t *iop = (hd_driveid_t *)iobuf;

#ifdef CONFIG_AMIGAONEG3SE
	int max_bus_scan;
	char *s;
#endif
#ifdef CONFIG_ATAPI
	int retries = 0;
	int do_retry = 0;
#endif

#if 0
	int mode, cycle_time;
#endif
	int device;
	device=dev_desc->dev;
	printf ("  Device %d: ", device);

#ifdef CONFIG_AMIGAONEG3SE
	s = getenv("ide_maxbus");
	if (s) {
		max_bus_scan = simple_strtol(s, NULL, 10);
	} else {
		max_bus_scan = CFG_IDE_MAXBUS;
	}
	if (device >= max_bus_scan*2) {
		dev_desc->type=DEV_TYPE_UNKNOWN;
		return;
	}
#endif

	ide_led (DEVICE_LED(device), 1);	/* LED on	*/
	/* Select device
	 */
	ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
	dev_desc->if_type=IF_TYPE_IDE;
#ifdef CONFIG_ATAPI

    do_retry = 0;
    retries = 0;

    /* Warning: This will be tricky to read */
    while (retries <= 1) {
	/* check signature */
	if ((ide_inb(device,ATA_SECT_CNT) == 0x01) &&
		 (ide_inb(device,ATA_SECT_NUM) == 0x01) &&
		 (ide_inb(device,ATA_CYL_LOW)  == 0x14) &&
		 (ide_inb(device,ATA_CYL_HIGH) == 0xEB)) {
		/* ATAPI Signature found */
		dev_desc->if_type=IF_TYPE_ATAPI;
		/* Start Ident Command
		 */
		ide_outb (device, ATA_COMMAND, ATAPI_CMD_IDENT);
		/*
		 * Wait for completion - ATAPI devices need more time
		 * to become ready
		 */
		c = ide_wait (device, ATAPI_TIME_OUT);
	} else
#endif
	{
		/* Start Ident Command
		 */
		ide_outb (device, ATA_COMMAND, ATA_CMD_IDENT);

		/* Wait for completion
		 */
		c = ide_wait (device, IDE_TIME_OUT);
	}
	ide_led (DEVICE_LED(device), 0);	/* LED off	*/

	if (((c & ATA_STAT_DRQ) == 0) ||
	    ((c & (ATA_STAT_FAULT|ATA_STAT_ERR)) != 0) ) {
#ifdef CONFIG_ATAPI
#ifdef CONFIG_AMIGAONEG3SE
		s = getenv("ide_doreset");
		if (s && strcmp(s, "on") == 0)
#endif
		{
			/* Need to soft reset the device in case it's an ATAPI...  */
			debug ("Retrying...\n");
			ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
			udelay(100000);
			ide_outb (device, ATA_COMMAND, 0x08);
			udelay (500000);	/* 500 ms */
		}
		/* Select device
		 */
		ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
		retries++;
#else
		return;
#endif
	}
#ifdef CONFIG_ATAPI
	else
		break;
    }	/* see above - ugly to read */

	if (retries == 2) /* Not found */
		return;
#endif

	input_swap_data (device, iobuf, ATA_SECTORWORDS);

	ident_cpy ((unsigned char*)dev_desc->revision, iop->fw_rev, sizeof(dev_desc->revision));
	ident_cpy ((unsigned char*)dev_desc->vendor, iop->model, sizeof(dev_desc->vendor));
	ident_cpy ((unsigned char*)dev_desc->product, iop->serial_no, sizeof(dev_desc->product));
#ifdef __LITTLE_ENDIAN
	/*
	 * firmware revision and model number have Big Endian Byte
	 * order in Word. Convert both to little endian.
	 *
	 * See CF+ and CompactFlash Specification Revision 2.0:
	 * 6.2.1.6: Identfy Drive, Table 39 for more details
	 */

	strswab (dev_desc->revision);
	strswab (dev_desc->vendor);
#endif /* __LITTLE_ENDIAN */

	if ((iop->config & 0x0080)==0x0080)
		dev_desc->removable = 1;
	else
		dev_desc->removable = 0;

#if 0
	/*
	 * Drive PIO mode autoselection
	 */
	mode = iop->tPIO;

	printf ("tPIO = 0x%02x = %d\n",mode, mode);
	if (mode > 2) {		/* 2 is maximum allowed tPIO value */
		mode = 2;
		debug ("Override tPIO -> 2\n");
	}
	if (iop->field_valid & 2) {	/* drive implements ATA2? */
		debug ("Drive implements ATA2\n");
		if (iop->capability & 8) {	/* drive supports use_iordy? */
			cycle_time = iop->eide_pio_iordy;
		} else {
			cycle_time = iop->eide_pio;
		}
		debug ("cycle time = %d\n", cycle_time);
		mode = 4;
		if (cycle_time > 120) mode = 3;	/* 120 ns for PIO mode 4 */
		if (cycle_time > 180) mode = 2;	/* 180 ns for PIO mode 3 */
		if (cycle_time > 240) mode = 1;	/* 240 ns for PIO mode 4 */
		if (cycle_time > 383) mode = 0;	/* 383 ns for PIO mode 4 */
	}
	printf ("PIO mode to use: PIO %d\n", mode);
#endif /* 0 */

#ifdef CONFIG_ATAPI
	if (dev_desc->if_type==IF_TYPE_ATAPI) {
		atapi_inquiry(dev_desc);
		return;
	}
#endif /* CONFIG_ATAPI */

#ifdef __BIG_ENDIAN
	/* swap shorts */
	dev_desc->lba = (iop->lba_capacity << 16) | (iop->lba_capacity >> 16);
#else	/* ! __BIG_ENDIAN */
	/*
	 * do not swap shorts on little endian
	 *
	 * See CF+ and CompactFlash Specification Revision 2.0:
	 * 6.2.1.6: Identfy Drive, Table 39, Word Address 57-58 for details.
	 */
	dev_desc->lba = iop->lba_capacity;
#endif	/* __BIG_ENDIAN */

#ifdef CONFIG_LBA48
	if (iop->command_set_2 & 0x0400) { /* LBA 48 support */
		dev_desc->lba48 = 1;
		dev_desc->lba = (unsigned long long)iop->lba48_capacity[0] |
						  ((unsigned long long)iop->lba48_capacity[1] << 16) |
						  ((unsigned long long)iop->lba48_capacity[2] << 32) |
						  ((unsigned long long)iop->lba48_capacity[3] << 48);
	} else {
		dev_desc->lba48 = 0;
	}
#endif /* CONFIG_LBA48 */
	/* assuming HD */
	dev_desc->type=DEV_TYPE_HARDDISK;
	dev_desc->blksz=ATA_BLOCKSIZE;
	dev_desc->lun=0; /* just to fill something in... */

#if 0 	/* only used to test the powersaving mode,
	 * if enabled, the drive goes after 5 sec
	 * in standby mode */
	ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
	c = ide_wait (device, IDE_TIME_OUT);
	ide_outb (device, ATA_SECT_CNT, 1);
	ide_outb (device, ATA_LBA_LOW,  0);
	ide_outb (device, ATA_LBA_MID,  0);
	ide_outb (device, ATA_LBA_HIGH, 0);
	ide_outb (device, ATA_DEV_HD,   ATA_LBA | ATA_DEVICE(device));
	ide_outb (device, ATA_COMMAND,  0xe3);
	udelay (50);
	c = ide_wait (device, IDE_TIME_OUT);	/* can't take over 500 ms */
#endif
}


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

ulong ide_read (int device, lbaint_t blknr, ulong blkcnt, void *buffer)
{
	ulong n = 0;
	unsigned char c;
	unsigned char pwrsave=0; /* power save */
#ifdef CONFIG_LBA48
	unsigned char lba48 = 0;

	if (blknr & 0x0000fffff0000000) {
		/* more than 28 bits used, use 48bit mode */
		lba48 = 1;
	}
#endif
	debug ("ide_read dev %d start %qX, blocks %lX buffer at %lX\n",
		device, blknr, blkcnt, (ulong)buffer);

	ide_led (DEVICE_LED(device), 1);	/* LED on	*/

	/* Select device
	 */
	ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
	c = ide_wait (device, IDE_TIME_OUT);

	if (c & ATA_STAT_BUSY) {
		printf ("IDE read: device %d not ready\n", device);
		goto IDE_READ_E;
	}

	/* first check if the drive is in Powersaving mode, if yes,
	 * increase the timeout value */
	ide_outb (device, ATA_COMMAND,  ATA_CMD_CHK_PWR);
	udelay (50);

	c = ide_wait (device, IDE_TIME_OUT);	/* can't take over 500 ms */

	if (c & ATA_STAT_BUSY) {
		printf ("IDE read: device %d not ready\n", device);
		goto IDE_READ_E;
	}
	if ((c & ATA_STAT_ERR) == ATA_STAT_ERR) {
		printf ("No Powersaving mode %X\n", c);
	} else {
		c = ide_inb(device,ATA_SECT_CNT);
		debug ("Powersaving %02X\n",c);
		if(c==0)
			pwrsave=1;
	}


	while (blkcnt-- > 0) {

		c = ide_wait (device, IDE_TIME_OUT);

		if (c & ATA_STAT_BUSY) {
			printf ("IDE read: device %d not ready\n", device);
			break;
		}
#ifdef CONFIG_LBA48
		if (lba48) {
			/* write high bits */
			ide_outb (device, ATA_SECT_CNT, 0);
			ide_outb (device, ATA_LBA_LOW,	(blknr >> 24) & 0xFF);
			ide_outb (device, ATA_LBA_MID,	(blknr >> 32) & 0xFF);
			ide_outb (device, ATA_LBA_HIGH, (blknr >> 40) & 0xFF);
		}
#endif
		ide_outb (device, ATA_SECT_CNT, 1);
		ide_outb (device, ATA_LBA_LOW,  (blknr >>  0) & 0xFF);
		ide_outb (device, ATA_LBA_MID,  (blknr >>  8) & 0xFF);
		ide_outb (device, ATA_LBA_HIGH, (blknr >> 16) & 0xFF);

#ifdef CONFIG_LBA48
		if (lba48) {
			ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device) );
			ide_outb (device, ATA_COMMAND, ATA_CMD_READ_EXT);

		} else
#endif
		{
			ide_outb (device, ATA_DEV_HD,   ATA_LBA		|
						    ATA_DEVICE(device)	|
						    ((blknr >> 24) & 0xF) );
			ide_outb (device, ATA_COMMAND,  ATA_CMD_READ);
		}

		udelay (50);

		if(pwrsave) {
			c = ide_wait (device, IDE_SPIN_UP_TIME_OUT);	/* may take up to 4 sec */
			pwrsave=0;
		} else {
			c = ide_wait (device, IDE_TIME_OUT);	/* can't take over 500 ms */
		}

		if ((c&(ATA_STAT_DRQ|ATA_STAT_BUSY|ATA_STAT_ERR)) != ATA_STAT_DRQ) {
#if defined(CFG_64BIT_LBA) && defined(CFG_64BIT_VSPRINTF)
			printf ("Error (no IRQ) dev %d blk %qd: status 0x%02x\n",
				device, blknr, c);
#else
			printf ("Error (no IRQ) dev %d blk %ld: status 0x%02x\n",
				device, (ulong)blknr, c);
#endif
			break;
		}

		input_data (device, buffer, ATA_SECTORWORDS);
		(void) ide_inb (device, ATA_STATUS);	/* clear IRQ */

		++n;
		++blknr;
		buffer += ATA_BLOCKSIZE;
	}
IDE_READ_E:
	ide_led (DEVICE_LED(device), 0);	/* LED off	*/
	return (n);
}

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


ulong ide_write (int device, lbaint_t blknr, ulong blkcnt, void *buffer)
{
	ulong n = 0;
	unsigned char c;
#ifdef CONFIG_LBA48
	unsigned char lba48 = 0;

	if (blknr & 0x0000fffff0000000) {
		/* more than 28 bits used, use 48bit mode */
		lba48 = 1;
	}
#endif

	ide_led (DEVICE_LED(device), 1);	/* LED on	*/

	/* Select device
	 */
	ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));

	while (blkcnt-- > 0) {

		c = ide_wait (device, IDE_TIME_OUT);

		if (c & ATA_STAT_BUSY) {
			printf ("IDE read: device %d not ready\n", device);
			goto WR_OUT;
		}
#ifdef CONFIG_LBA48
		if (lba48) {
			/* write high bits */
			ide_outb (device, ATA_SECT_CNT, 0);
			ide_outb (device, ATA_LBA_LOW,	(blknr >> 24) & 0xFF);
			ide_outb (device, ATA_LBA_MID,	(blknr >> 32) & 0xFF);
			ide_outb (device, ATA_LBA_HIGH, (blknr >> 40) & 0xFF);
		}
#endif
		ide_outb (device, ATA_SECT_CNT, 1);
		ide_outb (device, ATA_LBA_LOW,  (blknr >>  0) & 0xFF);
		ide_outb (device, ATA_LBA_MID,  (blknr >>  8) & 0xFF);
		ide_outb (device, ATA_LBA_HIGH, (blknr >> 16) & 0xFF);

#ifdef CONFIG_LBA48
		if (lba48) {
			ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device) );
			ide_outb (device, ATA_COMMAND,	ATA_CMD_WRITE_EXT);

		} else
#endif
		{
			ide_outb (device, ATA_DEV_HD,   ATA_LBA		|
						    ATA_DEVICE(device)	|
						    ((blknr >> 24) & 0xF) );
			ide_outb (device, ATA_COMMAND,  ATA_CMD_WRITE);
		}

		udelay (50);

		c = ide_wait (device, IDE_TIME_OUT);	/* can't take over 500 ms */

		if ((c&(ATA_STAT_DRQ|ATA_STAT_BUSY|ATA_STAT_ERR)) != ATA_STAT_DRQ) {
#if defined(CFG_64BIT_LBA) && defined(CFG_64BIT_VSPRINTF)
			printf ("Error (no IRQ) dev %d blk %qd: status 0x%02x\n",
				device, blknr, c);
#else
			printf ("Error (no IRQ) dev %d blk %ld: status 0x%02x\n",
				device, (ulong)blknr, c);
#endif
			goto WR_OUT;
		}

		output_data (device, buffer, ATA_SECTORWORDS);
		c = ide_inb (device, ATA_STATUS);	/* clear IRQ */
		++n;
		++blknr;
		buffer += ATA_BLOCKSIZE;
	}
WR_OUT:
	ide_led (DEVICE_LED(device), 0);	/* LED off	*/
	return (n);
}

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

/*
 * copy src to dest, skipping leading and trailing blanks and null
 * terminate the string
 * "len" is the size of available memory including the terminating '\0'
 */
static void ident_cpy (unsigned char *dst, unsigned char *src, unsigned int len)
{
	unsigned char *end, *last;

	last = dst;
	end  = src + len - 1;

	/* reserve space for '\0' */
	if (len < 2)
		goto OUT;

	/* skip leading white space */
	while ((*src) && (src<end) && (*src==' '))
		++src;

	/* copy string, omitting trailing white space */
	while ((*src) && (src<end)) {
		*dst++ = *src;
		if (*src++ != ' ')
			last = dst;
	}
OUT:
	*last = '\0';
}

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

/*
 * Wait until Busy bit is off, or timeout (in ms)
 * Return last status
 */
static uchar ide_wait (int dev, ulong t)
{
	ulong delay = 10 * t;		/* poll every 100 us */
	uchar c;

	while ((c = ide_inb(dev, ATA_STATUS)) & ATA_STAT_BUSY) {
		udelay (100);
		if (delay-- == 0) {
			break;
		}
	}
	return (c);
}

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

#ifdef CONFIG_IDE_RESET
extern void ide_set_reset(int idereset);

static void ide_reset (void)
{
#if defined(CFG_PB_12V_ENABLE) || defined(CFG_PB_IDE_MOTOR)
	volatile immap_t *immr = (immap_t *)CFG_IMMR;
#endif
	int i;

	curr_device = -1;
	for (i=0; i<CFG_IDE_MAXBUS; ++i)
		ide_bus_ok[i] = 0;
	for (i=0; i<CFG_IDE_MAXDEVICE; ++i)
		ide_dev_desc[i].type = DEV_TYPE_UNKNOWN;

	ide_set_reset (1); /* assert reset */

	/* the reset signal shall be asserted for et least 25 us */
	udelay(25);

	WATCHDOG_RESET();

#ifdef CFG_PB_12V_ENABLE
	immr->im_cpm.cp_pbdat &= ~(CFG_PB_12V_ENABLE);	/* 12V Enable output OFF */
	immr->im_cpm.cp_pbpar &= ~(CFG_PB_12V_ENABLE);
	immr->im_cpm.cp_pbodr &= ~(CFG_PB_12V_ENABLE);
	immr->im_cpm.cp_pbdir |=   CFG_PB_12V_ENABLE;

	/* wait 500 ms for the voltage to stabilize
	 */
	for (i=0; i<500; ++i) {
		udelay (1000);
	}

	immr->im_cpm.cp_pbdat |=   CFG_PB_12V_ENABLE;	/* 12V Enable output ON */
#endif	/* CFG_PB_12V_ENABLE */

#ifdef CFG_PB_IDE_MOTOR
	/* configure IDE Motor voltage monitor pin as input */
	immr->im_cpm.cp_pbpar &= ~(CFG_PB_IDE_MOTOR);
	immr->im_cpm.cp_pbodr &= ~(CFG_PB_IDE_MOTOR);
	immr->im_cpm.cp_pbdir &= ~(CFG_PB_IDE_MOTOR);

	/* wait up to 1 s for the motor voltage to stabilize
	 */
	for (i=0; i<1000; ++i) {
		if ((immr->im_cpm.cp_pbdat & CFG_PB_IDE_MOTOR) != 0) {
			break;
		}
		udelay (1000);
	}

	if (i == 1000) {	/* Timeout */
		printf ("\nWarning: 5V for IDE Motor missing\n");
# ifdef CONFIG_STATUS_LED
#  ifdef STATUS_LED_YELLOW
		status_led_set  (STATUS_LED_YELLOW, STATUS_LED_ON );
#  endif
#  ifdef STATUS_LED_GREEN
		status_led_set  (STATUS_LED_GREEN,  STATUS_LED_OFF);
#  endif
# endif	/* CONFIG_STATUS_LED */
	}
#endif	/* CFG_PB_IDE_MOTOR */

	WATCHDOG_RESET();

	/* de-assert RESET signal */
	ide_set_reset(0);

	/* wait 250 ms */
	for (i=0; i<250; ++i) {
		udelay (1000);
	}
}

#endif	/* CONFIG_IDE_RESET */

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

#if defined(CONFIG_IDE_LED)	&& \
   !defined(CONFIG_AMIGAONEG3SE)&& \
   !defined(CONFIG_CPC45)	&& \
   !defined(CONFIG_HMI10)	&& \
   !defined(CONFIG_KUP4K)	&& \
   !defined(CONFIG_KUP4X)

static	uchar	led_buffer = 0;		/* Buffer for current LED status	*/

static void ide_led (uchar led, uchar status)
{
	uchar *led_port = LED_PORT;

	if (status)	{		/* switch LED on	*/
		led_buffer |=  led;
	} else {			/* switch LED off	*/
		led_buffer &= ~led;
	}

	*led_port = led_buffer;
}

#endif	/* CONFIG_IDE_LED */

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

#ifdef CONFIG_ATAPI
/****************************************************************************
 * ATAPI Support
 */

#if defined(__PPC__) || defined(CONFIG_PXA_PCMCIA)
/* since ATAPI may use commands with not 4 bytes alligned length
 * we have our own transfer functions, 2 bytes alligned */
static void
output_data_shorts(int dev, ushort *sect_buf, int shorts)
{
#if defined(CONFIG_HMI10) || defined(CONFIG_CPC45)
	uchar	*dbuf;
	volatile uchar	*pbuf_even;
	volatile uchar	*pbuf_odd;

	pbuf_even = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_EVEN);
	pbuf_odd  = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_ODD);
	while (shorts--) {
		EIEIO;
		*pbuf_even = *dbuf++;
		EIEIO;
		*pbuf_odd = *dbuf++;
	}
#else
	ushort	*dbuf;
	volatile ushort	*pbuf;

	pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG);
	dbuf = (ushort *)sect_buf;

	debug ("in output data shorts base for read is %lx\n", (unsigned long) pbuf);

	while (shorts--) {
		EIEIO;
		*pbuf = *dbuf++;
	}
#endif
}

static void
input_data_shorts(int dev, ushort *sect_buf, int shorts)
{
#if defined(CONFIG_HMI10) || defined(CONFIG_CPC45)
	uchar	*dbuf;
	volatile uchar	*pbuf_even;
	volatile uchar	*pbuf_odd;

	pbuf_even = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_EVEN);
	pbuf_odd  = (uchar *)(ATA_CURR_BASE(dev)+ATA_DATA_ODD);
	while (shorts--) {
		EIEIO;
		*dbuf++ = *pbuf_even;
		EIEIO;
		*dbuf++ = *pbuf_odd;
	}
#else
	ushort	*dbuf;
	volatile ushort	*pbuf;

	pbuf = (ushort *)(ATA_CURR_BASE(dev)+ATA_DATA_REG);
	dbuf = (ushort *)sect_buf;

	debug("in input data shorts base for read is %lx\n", (unsigned long) pbuf);

	while (shorts--) {
		EIEIO;
		*dbuf++ = *pbuf;
	}
#endif
}

#else	/* ! __PPC__ */
static void
output_data_shorts(int dev, ushort *sect_buf, int shorts)
{
	outsw(ATA_CURR_BASE(dev)+ATA_DATA_REG, sect_buf, shorts);
}

static void
input_data_shorts(int dev, ushort *sect_buf, int shorts)
{
	insw(ATA_CURR_BASE(dev)+ATA_DATA_REG, sect_buf, shorts);
}

#endif	/* __PPC__ */

/*
 * Wait until (Status & mask) == res, or timeout (in ms)
 * Return last status
 * This is used since some ATAPI CD ROMs clears their Busy Bit first
 * and then they set their DRQ Bit
 */
static uchar atapi_wait_mask (int dev, ulong t,uchar mask, uchar res)
{
	ulong delay = 10 * t;		/* poll every 100 us */
	uchar c;

	c = ide_inb(dev,ATA_DEV_CTL); /* prevents to read the status before valid */
	while (((c = ide_inb(dev, ATA_STATUS)) & mask) != res) {
		/* break if error occurs (doesn't make sense to wait more) */
		if((c & ATA_STAT_ERR)==ATA_STAT_ERR)
			break;
		udelay (100);
		if (delay-- == 0) {
			break;
		}
	}
	return (c);
}

/*
 * issue an atapi command
 */
unsigned char atapi_issue(int device,unsigned char* ccb,int ccblen, unsigned char * buffer,int buflen)
{
	unsigned char c,err,mask,res;
	int n;
	ide_led (DEVICE_LED(device), 1);	/* LED on	*/

	/* Select device
	 */
	mask = ATA_STAT_BUSY|ATA_STAT_DRQ;
	res = 0;
#ifdef	CONFIG_AMIGAONEG3SE
# warning THF: Removed LBA mode ???
#endif
	ide_outb (device, ATA_DEV_HD, ATA_LBA | ATA_DEVICE(device));
	c = atapi_wait_mask(device,ATAPI_TIME_OUT,mask,res);
	if ((c & mask) != res) {
		printf ("ATAPI_ISSUE: device %d not ready status %X\n", device,c);
		err=0xFF;
		goto AI_OUT;
	}
	/* write taskfile */
	ide_outb (device, ATA_ERROR_REG, 0); /* no DMA, no overlaped */
	ide_outb (device, ATA_SECT_CNT, 0);
	ide_outb (device, ATA_SECT_NUM, 0);
	ide_outb (device, ATA_CYL_LOW,  (unsigned char)(buflen & 0xFF));
	ide_outb (device, ATA_CYL_HIGH, (unsigned char)((buflen>>8) & 0xFF));
#ifdef	CONFIG_AMIGAONEG3SE
# warning THF: Removed LBA mode ???
#endif
	ide_outb (device, ATA_DEV_HD,   ATA_LBA | ATA_DEVICE(device));

	ide_outb (device, ATA_COMMAND,  ATAPI_CMD_PACKET);
	udelay (50);

	mask = ATA_STAT_DRQ|ATA_STAT_BUSY|ATA_STAT_ERR;
	res = ATA_STAT_DRQ;
	c = atapi_wait_mask(device,ATAPI_TIME_OUT,mask,res);

	if ((c & mask) != res) { /* DRQ must be 1, BSY 0 */
		printf ("ATTAPI_ISSUE: Error (no IRQ) before sending ccb dev %d status 0x%02x\n",device,c);
		err=0xFF;
		goto AI_OUT;
	}

	output_data_shorts (device, (unsigned short *)ccb,ccblen/2); /* write command block */
 	/* ATAPI Command written wait for completition */
	udelay (5000); /* device must set bsy */

	mask = ATA_STAT_DRQ|ATA_STAT_BUSY|ATA_STAT_ERR;
	/* if no data wait for DRQ = 0 BSY = 0
	 * if data wait for DRQ = 1 BSY = 0 */
	res=0;
	if(buflen)
		res = ATA_STAT_DRQ;
	c = atapi_wait_mask(device,ATAPI_TIME_OUT,mask,res);
	if ((c & mask) != res ) {
		if (c & ATA_STAT_ERR) {
			err=(ide_inb(device,ATA_ERROR_REG))>>4;
			debug ("atapi_issue 1 returned sense key %X status %02X\n",err,c);
		} else {
			printf ("ATTAPI_ISSUE: (no DRQ) after sending ccb (%x)  status 0x%02x\n", ccb[0],c);
			err=0xFF;
		}
		goto AI_OUT;
	}
	n=ide_inb(device, ATA_CYL_HIGH);
	n<<=8;
	n+=ide_inb(device, ATA_CYL_LOW);
	if(n>buflen) {
		printf("ERROR, transfer bytes %d requested only %d\n",n,buflen);
		err=0xff;
		goto AI_OUT;
	}
	if((n==0)&&(buflen<0)) {
		printf("ERROR, transfer bytes %d requested %d\n",n,buflen);
		err=0xff;
		goto AI_OUT;
	}
	if(n!=buflen) {
		debug ("WARNING, transfer bytes %d not equal with requested %d\n",n,buflen);
	}
	if(n!=0) { /* data transfer */
		debug ("ATAPI_ISSUE: %d Bytes to transfer\n",n);
		 /* we transfer shorts */
		n>>=1;
		/* ok now decide if it is an in or output */
		if ((ide_inb(device, ATA_SECT_CNT)&0x02)==0) {
			debug ("Write to device\n");
			output_data_shorts(device,(unsigned short *)buffer,n);
		} else {
			debug ("Read from device @ %p shorts %d\n",buffer,n);
			input_data_shorts(device,(unsigned short *)buffer,n);
		}
	}
	udelay(5000); /* seems that some CD ROMs need this... */
	mask = ATA_STAT_BUSY|ATA_STAT_ERR;
	res=0;
	c = atapi_wait_mask(device,ATAPI_TIME_OUT,mask,res);
	if ((c & ATA_STAT_ERR) == ATA_STAT_ERR) {
		err=(ide_inb(device,ATA_ERROR_REG) >> 4);
		debug ("atapi_issue 2 returned sense key %X status %X\n",err,c);
	} else {
		err = 0;
	}
AI_OUT:
	ide_led (DEVICE_LED(device), 0);	/* LED off	*/
	return (err);
}

/*
 * sending the command to atapi_issue. If an status other than good
 * returns, an request_sense will be issued
 */

#define ATAPI_DRIVE_NOT_READY 	100
#define ATAPI_UNIT_ATTN		10

unsigned char atapi_issue_autoreq (int device,
				   unsigned char* ccb,
				   int ccblen,
				   unsigned char *buffer,
				   int buflen)
{
	unsigned char sense_data[18],sense_ccb[12];
	unsigned char res,key,asc,ascq;
	int notready,unitattn;

#ifdef CONFIG_AMIGAONEG3SE
	char *s;
	unsigned int timeout, retrycnt;

	s = getenv("ide_cd_timeout");
	timeout = s ? (simple_strtol(s, NULL, 10)*1000000)/5 : 0;

	retrycnt = 0;
#endif

	unitattn=ATAPI_UNIT_ATTN;
	notready=ATAPI_DRIVE_NOT_READY;

retry:
	res= atapi_issue(device,ccb,ccblen,buffer,buflen);
	if (res==0)
		return (0); /* Ok */

	if (res==0xFF)
		return (0xFF); /* error */

	debug ("(auto_req)atapi_issue returned sense key %X\n",res);

	memset(sense_ccb,0,sizeof(sense_ccb));
	memset(sense_data,0,sizeof(sense_data));
	sense_ccb[0]=ATAPI_CMD_REQ_SENSE;
	sense_ccb[4]=18; /* allocation Length */

	res=atapi_issue(device,sense_ccb,12,sense_data,18);
	key=(sense_data[2]&0xF);
	asc=(sense_data[12]);
	ascq=(sense_data[13]);

	debug ("ATAPI_CMD_REQ_SENSE returned %x\n",res);
	debug (" Sense page: %02X key %02X ASC %02X ASCQ %02X\n",
		sense_data[0],
		key,
		asc,
		ascq);

	if((key==0))
		return 0; /* ok device ready */

	if((key==6)|| (asc==0x29) || (asc==0x28)) { /* Unit Attention */
		if(unitattn-->0) {
			udelay(200*1000);
			goto retry;
		}
		printf("Unit Attention, tried %d\n",ATAPI_UNIT_ATTN);
		goto error;
	}
	if((asc==0x4) && (ascq==0x1)) { /* not ready, but will be ready soon */
		if (notready-->0) {
			udelay(200*1000);
			goto retry;
		}
		printf("Drive not ready, tried %d times\n",ATAPI_DRIVE_NOT_READY);
		goto error;
	}
	if(asc==0x3a) {
		debug ("Media not present\n");
		goto error;
	}

#ifdef CONFIG_AMIGAONEG3SE
	if ((sense_data[2]&0xF)==0x0B) {
		debug ("ABORTED COMMAND...retry\n");
		if (retrycnt++ < 4)
			goto retry;
		return (0xFF);
	}

	if ((sense_data[2]&0xf) == 0x02 &&
	    sense_data[12] == 0x04	&&
	    sense_data[13] == 0x01	) {
		debug ("Waiting for unit to become active\n");
		udelay(timeout);
		if (retrycnt++ < 4)
			goto retry;
		return 0xFF;
	}
#endif	/* CONFIG_AMIGAONEG3SE */

	printf ("ERROR: Unknown Sense key %02X ASC %02X ASCQ %02X\n",key,asc,ascq);
error:
	debug  ("ERROR Sense key %02X ASC %02X ASCQ %02X\n",key,asc,ascq);
	return (0xFF);
}


static void	atapi_inquiry(block_dev_desc_t * dev_desc)
{
	unsigned char ccb[12]; /* Command descriptor block */
	unsigned char iobuf[64]; /* temp buf */
	unsigned char c;
	int device;

	device=dev_desc->dev;
	dev_desc->type=DEV_TYPE_UNKNOWN; /* not yet valid */
	dev_desc->block_read=atapi_read;

	memset(ccb,0,sizeof(ccb));
	memset(iobuf,0,sizeof(iobuf));

	ccb[0]=ATAPI_CMD_INQUIRY;
	ccb[4]=40; /* allocation Legnth */
	c=atapi_issue_autoreq(device,ccb,12,(unsigned char *)iobuf,40);

	debug ("ATAPI_CMD_INQUIRY returned %x\n",c);
	if (c!=0)
		return;

	/* copy device ident strings */
	ident_cpy((unsigned char*)dev_desc->vendor,&iobuf[8],8);
	ident_cpy((unsigned char*)dev_desc->product,&iobuf[16],16);
	ident_cpy((unsigned char*)dev_desc->revision,&iobuf[32],5);

	dev_desc->lun=0;
	dev_desc->lba=0;
	dev_desc->blksz=0;
	dev_desc->type=iobuf[0] & 0x1f;

	if ((iobuf[1]&0x80)==0x80)
		dev_desc->removable = 1;
	else
		dev_desc->removable = 0;

	memset(ccb,0,sizeof(ccb));
	memset(iobuf,0,sizeof(iobuf));
	ccb[0]=ATAPI_CMD_START_STOP;
	ccb[4]=0x03; /* start */

	c=atapi_issue_autoreq(device,ccb,12,(unsigned char *)iobuf,0);

	debug ("ATAPI_CMD_START_STOP returned %x\n",c);
	if (c!=0)
		return;

	memset(ccb,0,sizeof(ccb));
	memset(iobuf,0,sizeof(iobuf));
	c=atapi_issue_autoreq(device,ccb,12,(unsigned char *)iobuf,0);

	debug ("ATAPI_CMD_UNIT_TEST_READY returned %x\n",c);
	if (c!=0)
		return;

	memset(ccb,0,sizeof(ccb));
	memset(iobuf,0,sizeof(iobuf));
	ccb[0]=ATAPI_CMD_READ_CAP;
	c=atapi_issue_autoreq(device,ccb,12,(unsigned char *)iobuf,8);
	debug ("ATAPI_CMD_READ_CAP returned %x\n",c);
	if (c!=0)
		return;

	debug ("Read Cap: LBA %02X%02X%02X%02X blksize %02X%02X%02X%02X\n",
		iobuf[0],iobuf[1],iobuf[2],iobuf[3],
		iobuf[4],iobuf[5],iobuf[6],iobuf[7]);

	dev_desc->lba  =((unsigned long)iobuf[0]<<24) +
			((unsigned long)iobuf[1]<<16) +
			((unsigned long)iobuf[2]<< 8) +
			((unsigned long)iobuf[3]);
	dev_desc->blksz=((unsigned long)iobuf[4]<<24) +
			((unsigned long)iobuf[5]<<16) +
			((unsigned long)iobuf[6]<< 8) +
			((unsigned long)iobuf[7]);
#ifdef CONFIG_LBA48
	dev_desc->lba48 = 0; /* ATAPI devices cannot use 48bit addressing (ATA/ATAPI v7) */
#endif
	return;
}


/*
 * atapi_read:
 * we transfer only one block per command, since the multiple DRQ per
 * command is not yet implemented
 */
#define ATAPI_READ_MAX_BYTES	2048	/* we read max 2kbytes */
#define ATAPI_READ_BLOCK_SIZE	2048	/* assuming CD part */
#define ATAPI_READ_MAX_BLOCK ATAPI_READ_MAX_BYTES/ATAPI_READ_BLOCK_SIZE	/* max blocks */

ulong atapi_read (int device, lbaint_t blknr, ulong blkcnt, void *buffer)
{
	ulong n = 0;
	unsigned char ccb[12]; /* Command descriptor block */
	ulong cnt;

	debug  ("atapi_read dev %d start %lX, blocks %lX buffer at %lX\n",
		device, blknr, blkcnt, (ulong)buffer);

	do {
		if (blkcnt>ATAPI_READ_MAX_BLOCK) {
			cnt=ATAPI_READ_MAX_BLOCK;
		} else {
			cnt=blkcnt;
		}
		ccb[0]=ATAPI_CMD_READ_12;
		ccb[1]=0; /* reserved */
		ccb[2]=(unsigned char) (blknr>>24) & 0xFF; /* MSB Block */
		ccb[3]=(unsigned char) (blknr>>16) & 0xFF; /*  */
		ccb[4]=(unsigned char) (blknr>> 8) & 0xFF;
		ccb[5]=(unsigned char)  blknr      & 0xFF; /* LSB Block */
		ccb[6]=(unsigned char) (cnt  >>24) & 0xFF; /* MSB Block count */
		ccb[7]=(unsigned char) (cnt  >>16) & 0xFF;
		ccb[8]=(unsigned char) (cnt  >> 8) & 0xFF;
		ccb[9]=(unsigned char)  cnt	   & 0xFF; /* LSB Block */
		ccb[10]=0; /* reserved */
		ccb[11]=0; /* reserved */

		if (atapi_issue_autoreq(device,ccb,12,
					(unsigned char *)buffer,
					cnt*ATAPI_READ_BLOCK_SIZE) == 0xFF) {
			return (n);
		}
		n+=cnt;
		blkcnt-=cnt;
		blknr+=cnt;
		buffer+=(cnt*ATAPI_READ_BLOCK_SIZE);
	} while (blkcnt > 0);
	return (n);
}

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

#endif /* CONFIG_ATAPI */

U_BOOT_CMD(
	ide,  5,  1,  do_ide,
	"ide     - IDE sub-system\n",
	"reset - reset IDE controller\n"
	"ide info  - show available IDE devices\n"
	"ide device [dev] - show or set current device\n"
	"ide part [dev] - print partition table of one or all IDE devices\n"
	"ide read  addr blk# cnt\n"
	"ide write addr blk# cnt - read/write `cnt'"
	" blocks starting at block `blk#'\n"
	"    to/from memory address `addr'\n"
);

U_BOOT_CMD(
	diskboot,	3,	1,	do_diskboot,
	"diskboot- boot from IDE device\n",
	"loadAddr dev:part\n"
);