board/ti/am335x/evm.c

/*
 * evm.c
 *
 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
 *
 * 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 version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 */

#include <common.h>
#include <errno.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/hardware.h>
#include <asm/arch/common_def.h>
#include <i2c.h>
#include <miiphy.h>
#include <cpsw.h>

DECLARE_GLOBAL_DATA_PTR;

#define UART_RESET		(0x1 << 1)
#define UART_CLK_RUNNING_MASK	0x1
#define UART_SMART_IDLE_EN	(0x1 << 0x3)

/* MII mode defines */
#define MII_MODE_ENABLE		0x0
#define RGMII_MODE_ENABLE	0xA

struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;

/*
 * I2C Address of on-board EEPROM
 */
#define I2C_BASE_BOARD_ADDR	0x50

#define NO_OF_MAC_ADDR          3
#define ETH_ALEN		6

#define NAME_LEN	8

struct am335x_baseboard_id {
	unsigned int  magic;
	char name[NAME_LEN];
	char version[4];
	char serial[12];
	char config[32];
	char mac_addr[NO_OF_MAC_ADDR][ETH_ALEN];
};

static struct am335x_baseboard_id header;

static inline int board_is_bone(void)
{
	return !strncmp(header.name, "A335BONE", NAME_LEN);
}

/*
 * Read header information from EEPROM into global structure.
 */
int read_eeprom(void)
{
	/* Check if baseboard eeprom is available */
	if (i2c_probe(I2C_BASE_BOARD_ADDR)) {
		printf("Could not probe the EEPROM; something fundamentally "
			"wrong on the I2C bus.\n");
		return -ENODEV;
	}

	/* read the eeprom using i2c */
	if (i2c_read(I2C_BASE_BOARD_ADDR, 0, 2, (uchar *)&header,
							sizeof(header))) {
		printf("Could not read the EEPROM; something fundamentally"
			" wrong on the I2C bus.\n");
		return -EIO;
	}

	if (header.magic != 0xEE3355AA) {
		/*
		 * read the eeprom using i2c again,
		 * but use only a 1 byte address
		 */
		if (i2c_read(I2C_BASE_BOARD_ADDR, 0, 1, (uchar *)&header,
							sizeof(header))) {
			printf("Could not read the EEPROM; something "
				"fundamentally wrong on the I2C bus.\n");
			return -EIO;
		}

		if (header.magic != 0xEE3355AA) {
			printf("Incorrect magic number in EEPROM\n");
			return -EINVAL;
		}
	}

	return 0;
}

/*
 * Basic board specific setup
 */
int board_init(void)
{
	enable_uart0_pin_mux();

	enable_i2c0_pin_mux();
	enable_i2c1_pin_mux();
	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
	if (read_eeprom() < 0)
		printf("Could not get board ID.\n");

	gd->bd->bi_boot_params = PHYS_DRAM_1 + 0x100;

	return 0;
}

#ifdef CONFIG_DRIVER_TI_CPSW
static void cpsw_control(int enabled)
{
	/* VTP can be added here */

	return;
}

static struct cpsw_slave_data cpsw_slaves[] = {
	{
		.slave_reg_ofs	= 0x208,
		.sliver_reg_ofs	= 0xd80,
		.phy_id		= 0,
	},
	{
		.slave_reg_ofs	= 0x308,
		.sliver_reg_ofs	= 0xdc0,
		.phy_id		= 1,
	},
};

static struct cpsw_platform_data cpsw_data = {
	.mdio_base		= AM335X_CPSW_MDIO_BASE,
	.cpsw_base		= AM335X_CPSW_BASE,
	.mdio_div		= 0xff,
	.channels		= 8,
	.cpdma_reg_ofs		= 0x800,
	.slaves			= 1,
	.slave_data		= cpsw_slaves,
	.ale_reg_ofs		= 0xd00,
	.ale_entries		= 1024,
	.host_port_reg_ofs	= 0x108,
	.hw_stats_reg_ofs	= 0x900,
	.mac_control		= (1 << 5),
	.control		= cpsw_control,
	.host_port_num		= 0,
	.version		= CPSW_CTRL_VERSION_2,
};

int board_eth_init(bd_t *bis)
{
	uint8_t mac_addr[6];
	uint32_t mac_hi, mac_lo;

	if (!eth_getenv_enetaddr("ethaddr", mac_addr)) {
		debug("<ethaddr> not set. Reading from E-fuse\n");
		/* try reading mac address from efuse */
		mac_lo = readl(&cdev->macid0l);
		mac_hi = readl(&cdev->macid0h);
		mac_addr[0] = mac_hi & 0xFF;
		mac_addr[1] = (mac_hi & 0xFF00) >> 8;
		mac_addr[2] = (mac_hi & 0xFF0000) >> 16;
		mac_addr[3] = (mac_hi & 0xFF000000) >> 24;
		mac_addr[4] = mac_lo & 0xFF;
		mac_addr[5] = (mac_lo & 0xFF00) >> 8;

		if (is_valid_ether_addr(mac_addr))
			eth_setenv_enetaddr("ethaddr", mac_addr);
		else
			return -1;
	}

	if (board_is_bone()) {
		enable_mii1_pin_mux();
		writel(MII_MODE_ENABLE, &cdev->miisel);
		cpsw_slaves[0].phy_if = cpsw_slaves[1].phy_if =
				PHY_INTERFACE_MODE_MII;
	} else {
		enable_rgmii1_pin_mux();
		writel(RGMII_MODE_ENABLE, &cdev->miisel);
		cpsw_slaves[0].phy_if = cpsw_slaves[1].phy_if =
				PHY_INTERFACE_MODE_RGMII;
	}

	return cpsw_register(&cpsw_data);
}
#endif