favr-32-ezkit.c

来自「最新版的u-boot,2008-10-18发布」· C语言 代码 · 共 96 行

/*
 * Copyright (C) 2008 Atmel Corporation
 *
 * 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 <netdev.h>

#include <asm/io.h>
#include <asm/sdram.h>
#include <asm/arch/clk.h>
#include <asm/arch/gpio.h>
#include <asm/arch/hmatrix.h>

DECLARE_GLOBAL_DATA_PTR;

static const struct sdram_config sdram_config = {
	/* MT48LC4M32B2P-6 (16 MB) */
	.data_bits	= SDRAM_DATA_32BIT,
	.row_bits	= 12,
	.col_bits	= 8,
	.bank_bits	= 2,
	.cas		= 3,
	.twr		= 2,
	.trc		= 7,
	.trp		= 2,
	.trcd		= 2,
	.tras		= 5,
	.txsr		= 5,
	/* 15.6 us */
	.refresh_period	= (156 * (SDRAMC_BUS_HZ / 1000)) / 10000,
};

int board_early_init_f(void)
{
	/* Enable SDRAM in the EBI mux */
	hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));

	gpio_enable_ebi();
	gpio_enable_usart3();
#if defined(CONFIG_MACB)
	gpio_enable_macb0();
#endif
#if defined(CONFIG_MMC)
	gpio_enable_mmci();
#endif

	return 0;
}

phys_size_t initdram(int board_type)
{
	unsigned long expected_size;
	unsigned long actual_size;
	void *sdram_base;

	sdram_base = map_physmem(EBI_SDRAM_BASE, EBI_SDRAM_SIZE, MAP_NOCACHE);

	expected_size = sdram_init(sdram_base, &sdram_config);
	actual_size = get_ram_size(sdram_base, expected_size);

	unmap_physmem(sdram_base, EBI_SDRAM_SIZE);

	if (expected_size != actual_size)
		printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
				actual_size >> 20, expected_size >> 20);

	return actual_size;
}

void board_init_info(void)
{
	gd->bd->bi_phy_id[0] = 0x01;
}

#if defined(CONFIG_MACB) && defined(CONFIG_CMD_NET)
int board_eth_init(bd_t *bi)
{
	return macb_eth_initialize(0, (void *)MACB0_BASE, bi->bi_phy_id[0]);
}
#endif