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/*
* This file is part of the coreboot project.
*
* Copyright 2014 Google Inc.
*
* 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 of the License.
*
* 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.
*/
#include <boardid.h>
#include <gpio.h>
#include <console/console.h>
#include <stdlib.h>
/*
* Gale boards dedicate to the board ID three GPIOs in ternary mode: 64, 65
* and 66.
*/
static int board_id_value = -1;
static uint8_t get_board_id(void)
{
uint8_t bid;
gpio_t hw_rev_gpios[] = {[2] = 66, [1] = 65, [0] = 64}; /* 64 is LSB */
bid = gpio_binary_first_base3_value(hw_rev_gpios,
ARRAY_SIZE(hw_rev_gpios));
printk(BIOS_INFO, "Board ID %d\n", bid);
return bid;
}
uint32_t board_id(void)
{
if (board_id_value < 0)
board_id_value = get_board_id();
return board_id_value;
}
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