cmd/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 <log.h>
  10 #include <tpm-common.h>
  11 #include <tpm-v2.h>
  12 #include "tpm-user-utils.h"
  13
  14 static int do_tpm2_startup(cmd_tbl_t *cmdtp, int flag, int argc,
  15                            char * const argv[])
  16 {
  17         enum tpm2_startup_types mode;
  18
  19         if (argc != 2)
  20                 return CMD_RET_USAGE;
  21
  22         if (!strcasecmp("TPM2_SU_CLEAR", argv[1])) {
  23                 mode = TPM2_SU_CLEAR;
  24         } else if (!strcasecmp("TPM2_SU_STATE", argv[1])) {
  25                 mode = TPM2_SU_STATE;
  26         } else {
  27                 printf("Couldn't recognize mode string: %s\n", argv[1]);
  28                 return CMD_RET_FAILURE;
  29         }
  30
  31         return report_return_code(tpm2_startup(mode));
  32 }
  33
  34 static int do_tpm2_self_test(cmd_tbl_t *cmdtp, int flag, int argc,
  35                              char * const argv[])
  36 {
  37         enum tpm2_yes_no full_test;
  38
  39         if (argc != 2)
  40                 return CMD_RET_USAGE;
  41
  42         if (!strcasecmp("full", argv[1])) {
  43                 full_test = TPMI_YES;
  44         } else if (!strcasecmp("continue", argv[1])) {
  45                 full_test = TPMI_NO;
  46         } else {
  47                 printf("Couldn't recognize test mode: %s\n", argv[1]);
  48                 return CMD_RET_FAILURE;
  49         }
  50
  51         return report_return_code(tpm2_self_test(full_test));
  52 }
  53
  54 static cmd_tbl_t tpm2_commands[] = {
  55         U_BOOT_CMD_MKENT(info, 0, 1, do_tpm_info, "", ""),
  56         U_BOOT_CMD_MKENT(init, 0, 1, do_tpm_init, "", ""),
  57         U_BOOT_CMD_MKENT(startup, 0, 1, do_tpm2_startup, "", ""),
  58         U_BOOT_CMD_MKENT(self_test, 0, 1, do_tpm2_self_test, "", ""),
  59 };
  60
  61 cmd_tbl_t *get_tpm_commands(unsigned int *size)
  62 {
  63         *size = ARRAY_SIZE(tpm2_commands);
  64
  65         return tpm2_commands;
  66 }
  67
  68 U_BOOT_CMD(tpm, CONFIG_SYS_MAXARGS, 1, do_tpm, "Issue a TPMv2.x command",
  69 "<command> [<arguments>]\n"
  70 "\n"
  71 "info\n"
  72 "    Show information about the TPM.\n"
  73 "init\n"
  74 "    Initialize the software stack. Always the first command to issue.\n"
  75 "startup <mode>\n"
  76 "    Issue a TPM2_Startup command.\n"
  77 "    <mode> is one of:\n"
  78 "        * TPM2_SU_CLEAR (reset state)\n"
  79 "        * TPM2_SU_STATE (preserved state)\n"
  80 "self_test <type>\n"
  81 "    Test the TPM capabilities.\n"
  82 "    <type> is one of:\n"
  83 "        * full (perform all tests)\n"
  84 "        * continue (only check untested tests)\n"
  85 );