board/ti/am43xx/board.c

/*
 * board.c
 *
 * Board functions for TI AM43XX based boards
 *
 * Copyright (C) 2013, Texas Instruments, Incorporated - http://www.ti.com/
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <i2c.h>
#include <asm/errno.h>
#include <spl.h>
#include <asm/arch/clock.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/mux.h>
#include "board.h"

DECLARE_GLOBAL_DATA_PTR;

/*
 * Read header information from EEPROM into global structure.
 */
static int read_eeprom(struct am43xx_board_id *header)
{
	/* Check if baseboard eeprom is available */
	if (i2c_probe(CONFIG_SYS_I2C_EEPROM_ADDR)) {
		printf("Could not probe the EEPROM at 0x%x\n",
		       CONFIG_SYS_I2C_EEPROM_ADDR);
		return -ENODEV;
	}

	/* read the eeprom using i2c */
	if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 2, (uchar *)header,
		     sizeof(struct am43xx_board_id))) {
		printf("Could not read the EEPROM\n");
		return -EIO;
	}

	if (header->magic != 0xEE3355AA) {
		/*
		 * read the eeprom using i2c again,
		 * but use only a 1 byte address
		 */
		if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 1, (uchar *)header,
			     sizeof(struct am43xx_board_id))) {
			printf("Could not read the EEPROM at 0x%x\n",
			       CONFIG_SYS_I2C_EEPROM_ADDR);
			return -EIO;
		}

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

	strncpy(am43xx_board_name, (char *)header->name, sizeof(header->name));
	am43xx_board_name[sizeof(header->name)] = 0;

	return 0;
}

#ifdef CONFIG_SPL_BUILD

const struct dpll_params dpll_ddr = {
		-1, -1, -1, -1, -1, -1, -1};

const struct dpll_params *get_dpll_ddr_params(void)
{
	return &dpll_ddr;
}

void set_uart_mux_conf(void)
{
	enable_uart0_pin_mux();
}

void set_mux_conf_regs(void)
{
	enable_board_pin_mux();
}

void sdram_init(void)
{
}
#endif

int board_init(void)
{
	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;

	return 0;
}

#ifdef CONFIG_BOARD_LATE_INIT
int board_late_init(void)
{
#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
	char safe_string[HDR_NAME_LEN + 1];
	struct am43xx_board_id header;

	if (read_eeprom(&header) < 0)
		puts("Could not get board ID.\n");

	/* Now set variables based on the header. */
	strncpy(safe_string, (char *)header.name, sizeof(header.name));
	safe_string[sizeof(header.name)] = 0;
	setenv("board_name", safe_string);

	strncpy(safe_string, (char *)header.version, sizeof(header.version));
	safe_string[sizeof(header.version)] = 0;
	setenv("board_rev", safe_string);
#endif
	return 0;
}
#endif