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tpm: Remove use of build-time TPM versions

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There is only one place in the code which assumes at build-time that we
are using either a v1 or a v2 TPM. Fix this up and add a new function to
return the version of a TPM.

Supported TPM versions (v1 and v2) can be enabled independently and it is
possible to use both versions at once. This is useful for sandbox when
running tests.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2018-11-23 21:29:32 -07:00
parent 40e9ede1dc
commit 0a60a0a65f
3 changed files with 29 additions and 11 deletions
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11
include/tpm-common.h
View File

@ -274,4 +274,15 @@ static inline cmd_tbl_t *get_tpm2_commands(unsigned int *size)
}
#endif
/**
* tpm_get_version() - Find the version of a TPM
*
* This checks the uclass data for a TPM device and returns the version number
* it supports.
*
* @dev: TPM device
* @return version number (TPM_V1 or TPMV2)
*/
enum tpm_version tpm_get_version(struct udevice *dev);
#endif /* __TPM_COMMON_H */

7
lib/tpm-common.c
View File

@ -12,6 +12,13 @@
#include <tpm-common.h>
#include "tpm-utils.h"
enum tpm_version tpm_get_version(struct udevice *dev)
{
struct tpm_chip_priv *priv = dev_get_uclass_priv(dev);
return priv->version;
}
int pack_byte_string(u8 *str, size_t size, const char *format, ...)
{
va_list args;

22
lib/tpm-v1.c
View File

@ -79,19 +79,19 @@ u32 tpm_clear_and_reenable(struct udevice *dev)
return ret;
}
#if IS_ENABLED(CONFIG_TPM_V1)
ret = tpm_physical_enable(dev);
if (ret != TPM_SUCCESS) {
log_err("TPM: Can't set enabled state\n");
return ret;
}
if (tpm_get_version(dev) == TPM_V1) {
ret = tpm_physical_enable(dev);
if (ret != TPM_SUCCESS) {
log_err("TPM: Can't set enabled state\n");
return ret;
}
ret = tpm_physical_set_deactivated(dev, 0);
if (ret != TPM_SUCCESS) {
log_err("TPM: Can't set deactivated state\n");
return ret;
ret = tpm_physical_set_deactivated(dev, 0);
if (ret != TPM_SUCCESS) {
log_err("TPM: Can't set deactivated state\n");
return ret;
}
}
#endif
return TPM_SUCCESS;
}