git.sur5r.net Git - u-boot/blob - lib/tpm-v2.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2018 Bootlin
   4  * Author: Miquel Raynal <miquel.raynal@bootlin.com>
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <tpm-common.h>
  10 #include <tpm-v2.h>
  11 #include "tpm-utils.h"
  12
  13 u32 tpm2_startup(enum tpm2_startup_types mode)
  14 {
  15         const u8 command_v2[12] = {
  16                 tpm_u16(TPM2_ST_NO_SESSIONS),
  17                 tpm_u32(12),
  18                 tpm_u32(TPM2_CC_STARTUP),
  19                 tpm_u16(mode),
  20         };
  21         int ret;
  22
  23         /*
  24          * Note TPM2_Startup command will return RC_SUCCESS the first time,
  25          * but will return RC_INITIALIZE otherwise.
  26          */
  27         ret = tpm_sendrecv_command(command_v2, NULL, NULL);
  28         if (ret && ret != TPM2_RC_INITIALIZE)
  29                 return ret;
  30
  31         return 0;
  32 }
  33
  34 u32 tpm2_self_test(enum tpm2_yes_no full_test)
  35 {
  36         const u8 command_v2[12] = {
  37                 tpm_u16(TPM2_ST_NO_SESSIONS),
  38                 tpm_u32(11),
  39                 tpm_u32(TPM2_CC_SELF_TEST),
  40                 full_test,
  41         };
  42
  43         return tpm_sendrecv_command(command_v2, NULL, NULL);
  44 }