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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#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
* Board id is 5 bit, so mask other bits while returning board id.
*/
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 & 0x1f);
}
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