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tpm: Add a 'tpm info' command 

Add a command to display basic information about a TPM such as the model and
open/close state. This can be useful for debugging.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Simon Glass 2015-08-22 18:31:40 -06:00
parent d616ba5f5b
commit ad77694e23
1 changed files with 26 additions and 0 deletions
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26
common/cmd_tpm.c
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@ -456,6 +456,26 @@ static int get_tpm(struct udevice **devp)
return 0;
}
static int do_tpm_info(cmd_tbl_t *cmdtp, int flag, int argc,
char *const argv[])
{
struct udevice *dev;
char buf[80];
int rc;
rc = get_tpm(&dev);
if (rc)
return rc;
rc = tpm_get_desc(dev, buf, sizeof(buf));
if (rc < 0) {
printf("Couldn't get TPM info (%d)\n", rc);
return CMD_RET_FAILURE;
}
printf("%s\n", buf);
return 0;
}
#endif
static int do_tpm_raw_transfer(cmd_tbl_t *cmdtp, int flag,
@ -637,6 +657,9 @@ TPM_COMMAND_NO_ARG(tpm_end_oiap)
U_BOOT_CMD_MKENT(cmd, 0, 1, do_tpm_ ## cmd, "", "")
static cmd_tbl_t tpm_commands[] = {
#ifdef CONFIG_DM_TPM
U_BOOT_CMD_MKENT(info, 0, 1, do_tpm_info, "", ""),
#endif
U_BOOT_CMD_MKENT(init, 0, 1,
do_tpm_init, "", ""),
U_BOOT_CMD_MKENT(startup, 0, 1,
@ -707,6 +730,9 @@ U_BOOT_CMD(tpm, CONFIG_SYS_MAXARGS, 1, do_tpm,
"cmd args...\n"
" - Issue TPM command <cmd> with arguments <args...>.\n"
"Admin Startup and State Commands:\n"
#ifdef CONFIG_DM_TPM
" info - Show information about the TPM\n"
#endif
" init\n"
" - Put TPM into a state where it waits for 'startup' command.\n"
" startup mode\n"