diff options
Diffstat (limited to 'src/mainboard/intel/elkhartlake_crb/board_id.c')
-rw-r--r-- | src/mainboard/intel/elkhartlake_crb/board_id.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/mainboard/intel/elkhartlake_crb/board_id.c b/src/mainboard/intel/elkhartlake_crb/board_id.c new file mode 100644 index 0000000000..90609ff079 --- /dev/null +++ b/src/mainboard/intel/elkhartlake_crb/board_id.c @@ -0,0 +1,43 @@ +/* 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); +} |