u-boot/board/ti/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 <netdev.h>
#include <asm/io.h>
#include <asm/arch/mem.h>
#include <asm/arch/mux.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/gpio.h>
#include <i2c.h>
#include <asm/mach-types.h>
#include "evm.h"

#define OMAP3EVM_GPIO_ETH_RST_GEN1		64
#define OMAP3EVM_GPIO_ETH_RST_GEN2		7

DECLARE_GLOBAL_DATA_PTR;

static u32 omap3_evm_version;

u32 get_omap3_evm_rev(void)
{
	return omap3_evm_version;
}

static void omap3_evm_get_revision(void)
{
#if defined(CONFIG_CMD_NET)
	/*
	 * Board revision can be ascertained only by identifying
	 * the Ethernet chipset.
	 */
	unsigned int smsc_id;

	/* Ethernet PHY ID is stored at ID_REV register */
	smsc_id = readl(CONFIG_SMC911X_BASE + 0x50) & 0xFFFF0000;
	printf("Read back SMSC id 0x%x\n", smsc_id);

	switch (smsc_id) {
	/* SMSC9115 chipset */
	case 0x01150000:
		omap3_evm_version = OMAP3EVM_BOARD_GEN_1;
		break;
	/* SMSC 9220 chipset */
	case 0x92200000:
	default:
		omap3_evm_version = OMAP3EVM_BOARD_GEN_2;
       }
#else
#if defined(CONFIG_STATIC_BOARD_REV)
	/*
	 * Look for static defintion of the board revision
	 */
	omap3_evm_version = CONFIG_STATIC_BOARD_REV;
#else
	/*
	 * Fallback to the default above.
	 */
	omap3_evm_version = OMAP3EVM_BOARD_GEN_2;
#endif
#endif	/* CONFIG_CMD_NET */
}

#ifdef CONFIG_USB_OMAP3
/*
 * MUSB port on OMAP3EVM Rev >= E requires extvbus programming.
 */
u8 omap3_evm_need_extvbus(void)
{
	u8 retval = 0;

	if (get_omap3_evm_rev() >= OMAP3EVM_BOARD_GEN_2)
		retval = 1;

	return retval;
}
#endif

/*
 * Routine: board_init
 * Description: Early hardware init.
 */
int board_init(void)
{
	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
	omap3_evm_get_revision();

#if defined(CONFIG_CMD_NET)
	reset_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)
{
	struct ctrl *ctrl_base = (struct ctrl *)OMAP34XX_CTRL_BASE;

	/* Configure GPMC registers */
	writel(NET_GPMC_CONFIG1, &gpmc_cfg->cs[5].config1);
	writel(NET_GPMC_CONFIG2, &gpmc_cfg->cs[5].config2);
	writel(NET_GPMC_CONFIG3, &gpmc_cfg->cs[5].config3);
	writel(NET_GPMC_CONFIG4, &gpmc_cfg->cs[5].config4);
	writel(NET_GPMC_CONFIG5, &gpmc_cfg->cs[5].config5);
	writel(NET_GPMC_CONFIG6, &gpmc_cfg->cs[5].config6);
	writel(NET_GPMC_CONFIG7, &gpmc_cfg->cs[5].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);
}

/**
 * Reset the ethernet chip.
 */
static void reset_net_chip(void)
{
	int ret;
	int rst_gpio;

	if (get_omap3_evm_rev() == OMAP3EVM_BOARD_GEN_1) {
		rst_gpio = OMAP3EVM_GPIO_ETH_RST_GEN1;
	} else {
		rst_gpio = OMAP3EVM_GPIO_ETH_RST_GEN2;
	}

	ret = omap_request_gpio(rst_gpio);
	if (ret < 0) {
		printf("Unable to get GPIO %d\n", rst_gpio);
		return ;
	}

	/* Configure as output */
	omap_set_gpio_direction(rst_gpio, 0);

	/* Send a pulse on the GPIO pin */
	omap_set_gpio_dataout(rst_gpio, 1);
	udelay(1);
	omap_set_gpio_dataout(rst_gpio, 0);
	udelay(1);
	omap_set_gpio_dataout(rst_gpio, 1);
}

int board_eth_init(bd_t *bis)
{
	int rc = 0;
#ifdef CONFIG_SMC911X
	rc = smc911x_initialize(0, CONFIG_SMC911X_BASE);
#endif
	return rc;
}