tpm: add TPM2_Shutdown command
TPM2_shutdown command is sharing same structure and logics with
TPM2_startup, thus this patch extends the existing startup APIs and
cmd functions to support shutdown instead of created new ones.
Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/cmd/tpm-v2.c b/cmd/tpm-v2.c
index 8517833..a6d57ee 100644
--- a/cmd/tpm-v2.c
+++ b/cmd/tpm-v2.c
@@ -18,11 +18,14 @@
enum tpm2_startup_types mode;
struct udevice *dev;
int ret;
+ bool bon = true;
ret = get_tpm(&dev);
if (ret)
return ret;
- if (argc != 2)
+
+ /* argv[2] is optional to perform a TPM2_CC_SHUTDOWN */
+ if (argc > 3 || (argc == 3 && strcasecmp("off", argv[2])))
return CMD_RET_USAGE;
if (!strcasecmp("TPM2_SU_CLEAR", argv[1])) {
@@ -34,7 +37,10 @@
return CMD_RET_FAILURE;
}
- return report_return_code(tpm2_startup(dev, mode));
+ if (argv[2])
+ bon = false;
+
+ return report_return_code(tpm2_startup(dev, bon, mode));
}
static int do_tpm2_self_test(struct cmd_tbl *cmdtp, int flag, int argc,
@@ -420,11 +426,13 @@
" Initialize the software stack. Always the first command to issue.\n"
" 'tpm startup' is the only acceptable command after a 'tpm init' has been\n"
" issued\n"
-"startup <mode>\n"
+"startup <mode> [<op>]\n"
" Issue a TPM2_Startup command.\n"
" <mode> is one of:\n"
" * TPM2_SU_CLEAR (reset state)\n"
" * TPM2_SU_STATE (preserved state)\n"
+" <op>:\n"
+" * off - To shutdown the TPM\n"
"self_test <type>\n"
" Test the TPM capabilities.\n"
" <type> is one of:\n"