| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #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); |
| } |