/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2019 Intel Corporation.
 *
 * 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 <ec/acpi/ec.h>
#include <ec/google/chromeec/ec.h>
#include <stdint.h>

#include "board_id.h"

static uint32_t get_board_id_via_ext_ec(void)
{
	uint32_t id = BOARD_ID_INIT;

	if (google_chromeec_get_board_version(&id))
		id = BOARD_ID_UNKNOWN;

	return id;
}

/* Get Board ID via EC I/O port write/read */
int get_board_id(void)
{
	MAYBE_STATIC_NONZERO int id = -1;

	if (id < 0) {
		if (CONFIG(EC_GOOGLE_CHROMEEC)) {
			id = get_board_id_via_ext_ec();
		} else {
			uint8_t buffer[2];
			uint8_t index;
			if (send_ec_command(EC_FAB_ID_CMD) == 0) {
				for (index = 0; index < sizeof(buffer); index++)
					buffer[index] = recv_ec_data();
				id = (buffer[0] << 8) | buffer[1];
			}
		}
	}
	return id;
}