src/mainboard/intel/jasperlake_rvp/board_id.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <boardid.h>
   4 #include <ec/acpi/ec.h>
   5 #include <ec/google/chromeec/ec.h>
   6 #include <stdint.h>
   7
   8 #include "board_id.h"
   9
  10 static uint32_t get_board_id_via_ext_ec(void)
  11 {
  12         uint32_t id = BOARD_ID_INIT;
  13
  14         if (google_chromeec_get_board_version(&id))
  15                 id = BOARD_ID_UNKNOWN;
  16
  17         return id;
  18 }
  19
  20 /*
  21  * Get Board ID via EC I/O port write/read
  22  * Board id is 5 bit, so mask other bits while returning board id.
  23  */
  24 int get_board_id(void)
  25 {
  26         static int id = -1;
  27
  28         if (id < 0) {
  29                 if (CONFIG(EC_GOOGLE_CHROMEEC)) {
  30                         id = get_board_id_via_ext_ec();
  31                 } else {
  32                         uint8_t buffer[2];
  33                         uint8_t index;
  34                         if (send_ec_command(EC_FAB_ID_CMD) == 0) {
  35                                 for (index = 0; index < sizeof(buffer); index++)
  36                                         buffer[index] = recv_ec_data();
  37                                 id = (buffer[0] << 8) | buffer[1];
  38                         }
  39                 }
  40         }
  41
  42         return (id & 0x1f);
  43 }