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https://github.com/brain-hackers/u-boot-brain
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f4af163e6c
CONFIG_ENV_VARS_UBOOT_CONFIG, CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG and CONFIG_BOARD_LATE_INIT is already set. Adding support to detect the board. These variables are used by findfdt. Signed-off-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
120 lines
2.5 KiB
C
120 lines
2.5 KiB
C
/*
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* board.c
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*
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* Board functions for TI AM43XX based boards
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*
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* Copyright (C) 2013, Texas Instruments, Incorporated - http://www.ti.com/
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <i2c.h>
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#include <asm/errno.h>
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#include <spl.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/arch/mux.h>
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#include "board.h"
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* Read header information from EEPROM into global structure.
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*/
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static int read_eeprom(struct am43xx_board_id *header)
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{
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/* Check if baseboard eeprom is available */
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if (i2c_probe(CONFIG_SYS_I2C_EEPROM_ADDR)) {
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printf("Could not probe the EEPROM at 0x%x\n",
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CONFIG_SYS_I2C_EEPROM_ADDR);
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return -ENODEV;
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}
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/* read the eeprom using i2c */
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if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 2, (uchar *)header,
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sizeof(struct am43xx_board_id))) {
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printf("Could not read the EEPROM\n");
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return -EIO;
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}
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if (header->magic != 0xEE3355AA) {
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/*
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* read the eeprom using i2c again,
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* but use only a 1 byte address
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*/
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if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 1, (uchar *)header,
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sizeof(struct am43xx_board_id))) {
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printf("Could not read the EEPROM at 0x%x\n",
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CONFIG_SYS_I2C_EEPROM_ADDR);
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return -EIO;
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}
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if (header->magic != 0xEE3355AA) {
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printf("Incorrect magic number (0x%x) in EEPROM\n",
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header->magic);
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return -EINVAL;
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}
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}
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strncpy(am43xx_board_name, (char *)header->name, sizeof(header->name));
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am43xx_board_name[sizeof(header->name)] = 0;
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return 0;
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}
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#ifdef CONFIG_SPL_BUILD
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const struct dpll_params dpll_ddr = {
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-1, -1, -1, -1, -1, -1, -1};
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const struct dpll_params *get_dpll_ddr_params(void)
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{
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return &dpll_ddr;
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}
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void set_uart_mux_conf(void)
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{
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enable_uart0_pin_mux();
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}
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void set_mux_conf_regs(void)
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{
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enable_board_pin_mux();
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}
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void sdram_init(void)
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{
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}
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#endif
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int board_init(void)
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{
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gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
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return 0;
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}
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#ifdef CONFIG_BOARD_LATE_INIT
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int board_late_init(void)
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{
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#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
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char safe_string[HDR_NAME_LEN + 1];
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struct am43xx_board_id header;
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if (read_eeprom(&header) < 0)
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puts("Could not get board ID.\n");
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/* Now set variables based on the header. */
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strncpy(safe_string, (char *)header.name, sizeof(header.name));
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safe_string[sizeof(header.name)] = 0;
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setenv("board_name", safe_string);
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strncpy(safe_string, (char *)header.version, sizeof(header.version));
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safe_string[sizeof(header.version)] = 0;
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setenv("board_rev", safe_string);
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#endif
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return 0;
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}
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#endif
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