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

#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	CONFIG_SYS_PIO_MODE
#define	CONFIG_SYS_PIO_MODE	0		/* use a relaxed default */
#endif
static int pio_mode = CONFIG_SYS_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[CONFIG_SYS_IDE_MAXBUS] = {
#if defined(CONFIG_SYS_ATA_IDE0_OFFSET)
	CONFIG_SYS_ATA_IDE0_OFFSET,
#endif
#if defined(CONFIG_SYS_ATA_IDE1_OFFSET) && (CONFIG_SYS_IDE_MAXBUS > 1)
	CONFIG_SYS_ATA_IDE1_OFFSET,
#endif
};


static int ide_bus_ok[CONFIG_SYS_IDE_MAXBUS];

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

#ifdef CONFIG_IDE_LED
# if !defined(CONFIG_BMS2003)	&& \
     !defined(CONFIG_CPC45)	&& \
     !defined(CONFIG_KUP4K) && \
     !defined(CONFIG_KUP4X)
static void  ide_led   (uchar led, uchar status);
#else
extern void  ide_led   (uchar led, uchar status);
#endif
#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);

#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 */

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 CONFIG_SYS_ATA_PORT_ADDR
#define CONFIG_SYS_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 * const argv[])
{
    int rcode = 0;

    switch (argc) {
    case 0:
    case 1:
	return cmd_usage(cmdtp);
    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<CONFIG_SYS_IDE_MAXDEVICE; ++i) {
			if (ide_dev_desc[i].type==DEV_TYPE_UNKNOWN)
				continue; /* list only known devices */