actux3.c

uboot详细解读可用启动引导LINUX2.6内核

/*
 * (C) Copyright 2007
 * Michael Schwingen, [e-mail]
 *
 * (C) Copyright 2006
 * Stefan Roese, DENX Software Engineering, [e-mail].
 *
 * (C) Copyright 2002
 * Kyle Harris, Nexus Technologies, Inc. [e-mail]
 *
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <[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
 */

#include <common.h>
#include <command.h>
#include <malloc.h>
#include <asm/arch/ixp425.h>
#include <asm/io.h>

#include <miiphy.h>

#include "actux3_hw.h"

DECLARE_GLOBAL_DATA_PTR;

int board_init (void)
{
	gd->bd->bi_arch_number = MACH_TYPE_ACTUX3;

	/* adress of boot parameters */
	gd->bd->bi_boot_params = 0x00000100;

	GPIO_OUTPUT_ENABLE (CFG_GPIO_IORST);
	GPIO_OUTPUT_ENABLE (CFG_GPIO_ETHRST);
	GPIO_OUTPUT_ENABLE (CFG_GPIO_DSR);
	GPIO_OUTPUT_ENABLE (CFG_GPIO_DCD);
	GPIO_OUTPUT_ENABLE (CFG_GPIO_LED5_GN);
	GPIO_OUTPUT_ENABLE (CFG_GPIO_LED6_RT);
	GPIO_OUTPUT_ENABLE (CFG_GPIO_LED6_GN);

	GPIO_OUTPUT_CLEAR (CFG_GPIO_IORST);
	GPIO_OUTPUT_CLEAR (CFG_GPIO_ETHRST);

	GPIO_OUTPUT_CLEAR (CFG_GPIO_DSR);
	GPIO_OUTPUT_SET (CFG_GPIO_DCD);

	GPIO_OUTPUT_CLEAR (CFG_GPIO_LED5_GN);
	GPIO_OUTPUT_CLEAR (CFG_GPIO_LED6_RT);
	GPIO_OUTPUT_CLEAR (CFG_GPIO_LED6_GN);

	/*
	 * Setup GPIO's for Interrupt inputs
	 */
	GPIO_OUTPUT_DISABLE (CFG_GPIO_DBGINT);
	GPIO_OUTPUT_DISABLE (CFG_GPIO_ETHINT);

	/*
	 * Setup GPIO's for 33MHz clock output
	 */
	GPIO_OUTPUT_ENABLE (CFG_GPIO_PCI_CLK);
	GPIO_OUTPUT_ENABLE (CFG_GPIO_EXTBUS_CLK);
	*IXP425_GPIO_GPCLKR = 0x011001FF;

	/* CS1: IPAC-X */
	*IXP425_EXP_CS1 = 0x94d10013;
	/* CS5: Debug port */
	*IXP425_EXP_CS5 = 0x9d520003;
	/* CS6: Release/Option register */
	*IXP425_EXP_CS6 = 0x81860001;
	/* CS7: LEDs */
	*IXP425_EXP_CS7 = 0x80900003;

	udelay (533);
	GPIO_OUTPUT_SET (CFG_GPIO_IORST);
	GPIO_OUTPUT_SET (CFG_GPIO_ETHRST);

	ACTUX3_LED1_RT (1);
	ACTUX3_LED1_GN (0);
	ACTUX3_LED2_RT (0);
	ACTUX3_LED2_GN (0);
	ACTUX3_LED3_RT (0);
	ACTUX3_LED3_GN (0);
	ACTUX3_LED4_GN (0);
	ACTUX3_LED5_RT (0);

	return 0;
}

/*
 * Check Board Identity
 */
int checkboard (void)
{
	char *s = getenv ("serial#");

	puts ("Board: AcTux-3 rev.");
	putc (ACTUX3_BOARDREL + 'A' - 1);

	if (s != NULL) {
		puts (", serial# ");
		puts (s);
	}
	putc ('\n');

	return (0);
}

/*************************************************************************
 * get_board_rev() - setup to pass kernel board revision information
 * 0 = reserved
 * 1 = Rev. A
 * 2 = Rev. B
 *************************************************************************/
u32 get_board_rev (void)
{
	return ACTUX3_BOARDREL;
}

int dram_init (void)
{
	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;

	return (0);
}

void reset_phy (void)
{
	int i;

	/* initialize the PHY */
	miiphy_reset ("NPE0", CONFIG_PHY_ADDR);

	/* all LED outputs = Link/Act */
	miiphy_write ("NPE0", CONFIG_PHY_ADDR, 0x16, 0x0AAA);

	/*
	 * The Marvell 88E6060 switch comes up with all ports disabled.
	 * set all ethernet switch ports to forwarding state
	*/
	for (i = 1; i <= 5; i++)
		miiphy_write ("NPE0", CONFIG_PHY_ADDR + 8 + i, 0x04, 0x03);

}