board/omap3/evm/evm.c

/*
 * (C) Copyright 2004-2008
 * Texas Instruments, <www.ti.com>
 *
 * Author :
 *	Manikandan Pillai <mani.pillai@ti.com>
 *
 * Derived from Beagle Board and 3430 SDP code by
 *	Richard Woodruff <r-woodruff2@ti.com>
 *	Syed Mohammed Khasim <khasim@ti.com>
 *
 * 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 <asm/io.h>
#include <asm/arch/mem.h>
#include <asm/arch/mux.h>
#include <asm/arch/sys_proto.h>
#include <i2c.h>
#include <asm/mach-types.h>
#include "evm.h"

/*
 * Routine: board_init
 * Description: Early hardware init.
 */
int board_init(void)
{
	DECLARE_GLOBAL_DATA_PTR;

	gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
	/* board id for Linux */
	gd->bd->bi_arch_number = MACH_TYPE_OMAP3EVM;
	/* boot param addr */
	gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);

	return 0;
}

/*
 * Routine: misc_init_r
 * Description: Init ethernet (done here so udelay works)
 */
int misc_init_r(void)
{

#ifdef CONFIG_DRIVER_OMAP34XX_I2C
	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
#endif

#if defined(CONFIG_CMD_NET)
	setup_net_chip();
#endif

	dieid_num_r();

	return 0;
}

/*
 * Routine: set_muxconf_regs
 * Description: Setting up the configuration Mux registers specific to the
 *		hardware. Many pins need to be moved from protect to primary
 *		mode.
 */
void set_muxconf_regs(void)
{
	MUX_EVM();
}

/*
 * Routine: setup_net_chip
 * Description: Setting up the configuration GPMC registers specific to the
 *		Ethernet hardware.
 */
static void setup_net_chip(void)
{
	gpio_t *gpio3_base = (gpio_t *)OMAP34XX_GPIO3_BASE;
	gpmc_csx_t *gpmc_cs6_base = (gpmc_csx_t *)GPMC_CONFIG_CS6_BASE;
	ctrl_t *ctrl_base = (ctrl_t *)OMAP34XX_CTRL_BASE;

	/* Configure GPMC registers */
	writel(NET_GPMC_CONFIG1, &gpmc_cs6_base->config1);
	writel(NET_GPMC_CONFIG2, &gpmc_cs6_base->config2);
	writel(NET_GPMC_CONFIG3, &gpmc_cs6_base->config3);
	writel(NET_GPMC_CONFIG4, &gpmc_cs6_base->config4);
	writel(NET_GPMC_CONFIG5, &gpmc_cs6_base->config5);
	writel(NET_GPMC_CONFIG6, &gpmc_cs6_base->config6);
	writel(NET_GPMC_CONFIG7, &gpmc_cs6_base->config7);

	/* Enable off mode for NWE in PADCONF_GPMC_NWE register */
	writew(readw(&ctrl_base ->gpmc_nwe) | 0x0E00, &ctrl_base->gpmc_nwe);
	/* Enable off mode for NOE in PADCONF_GPMC_NADV_ALE register */
	writew(readw(&ctrl_base->gpmc_noe) | 0x0E00, &ctrl_base->gpmc_noe);
	/* Enable off mode for ALE in PADCONF_GPMC_NADV_ALE register */
	writew(readw(&ctrl_base->gpmc_nadv_ale) | 0x0E00,
		&ctrl_base->gpmc_nadv_ale);

	/* Make GPIO 64 as output pin */
	writel(readl(&gpio3_base->oe) & ~(GPIO0), &gpio3_base->oe);

	/* Now send a pulse on the GPIO pin */
	writel(GPIO0, &gpio3_base->setdataout);
	udelay(1);
	writel(GPIO0, &gpio3_base->cleardataout);
	udelay(1);
	writel(GPIO0, &gpio3_base->setdataout);
}