u-boot/board/miromico/hammerhead/hammerhead.c

/*
 * Copyright (C) 2008 Miromico AG
 *
 * Mostly copied form atmel ATNGW100 sources
 *
 * 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 "../cpu/at32ap/at32ap700x/sm.h"

#include <common.h>

#include <asm/io.h>
#include <asm/sdram.h>
#include <asm/arch/clk.h>
#include <asm/arch/hmatrix.h>
#include <asm/arch/memory-map.h>
#include <asm/arch/portmux.h>

DECLARE_GLOBAL_DATA_PTR;

static const struct sdram_config sdram_config = {
	.data_bits	= SDRAM_DATA_32BIT,
	.row_bits	= 13,
	.col_bits	= 9,
	.bank_bits	= 2,
	.cas		= 3,
	.twr		= 2,
	.trc		= 7,
	.trp		= 2,
	.trcd		= 2,
	.tras		= 5,
	.txsr		= 5,
	/* 7.81 us */
	.refresh_period	= (781 * (SDRAMC_BUS_HZ / 1000)) / 100000,
};

extern int macb_eth_initialize(int id, void *regs, unsigned int phy_addr);

#ifdef CONFIG_CMD_NET
int board_eth_init(bd_t *bis)
{
	return macb_eth_initialize(0, (void *)MACB0_BASE, bis->bi_phy_id[0]);
}
#endif

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

	portmux_enable_ebi(32, 23, 0, PORTMUX_DRIVE_HIGH);
	portmux_enable_usart1(PORTMUX_DRIVE_MIN);

#if defined(CONFIG_MACB)
	portmux_enable_macb0(PORTMUX_MACB_MII, PORTMUX_DRIVE_HIGH);
#endif
#if defined(CONFIG_MMC)
	portmux_enable_mmci(0, PORTMUX_MMCI_4BIT, PORTMUX_DRIVE_LOW);
#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;
}

void gclk_init(void)
{
	/* Hammerhead boards uses GCLK3 as 25MHz output to ethernet PHY */

	/* Select GCLK3 peripheral function */
	portmux_select_peripheral(PORTMUX_PORT_B, 1 << 29, PORTMUX_FUNC_A, 0);

	/* Enable GCLK3 with no input divider, from OSC0 (crystal) */
	sm_writel(PM_GCCTRL(3), SM_BIT(CEN));
}