/* Max buffer size supported by our tpm */
#define TPM_DEV_BUFSIZE 1260
+#define TPM_PCR_MINIMUM_DIGEST_SIZE 20
+
+/**
+ * enum tpm_version - The version of the TPM stack to be used
+ * @TPM_V1: Use TPM v1.x stack
+ * @TPM_V2: Use TPM v2.x stack
+ */
+enum tpm_version {
+ TPM_V1 = 0,
+ TPM_V2,
+};
+
/**
* struct tpm_chip_priv - Information about a TPM, stored by the uclass
*
* communcation is attempted. If the device has an xfer() method, this is
* not needed. There is no need to set up @buf.
*
+ * @version: TPM stack to be used
* @duration_ms: Length of each duration type in milliseconds
* @retry_time_ms: Time to wait before retrying receive
+ * @buf: Buffer used during the exchanges with the chip
* @pcr_count: Number of PCR per bank
* @pcr_select_min: Minimum size in bytes of the pcrSelect array
- * @buf: Buffer used during the exchanges with the chip
*/
struct tpm_chip_priv {
+ enum tpm_version version;
+
uint duration_ms[TPM_DURATION_COUNT];
uint retry_time_ms;
-#if defined(CONFIG_TPM_V2)
+ u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */
+
+ /* TPM v2 specific data */
uint pcr_count;
uint pcr_select_min;
-#endif
- u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */
};
/**
* After all commands have been completed the caller should call
* close().
*
- * @dev: Device to close
+ * @dev: Device to open
* @return 0 ok OK, -ve on error
*/
int (*open)(struct udevice *dev);
int do_##cmd(cmd_tbl_t *cmdtp, int flag, \
int argc, char * const argv[]) \
{ \
+ struct udevice *dev; \
+ int rc; \
+ \
+ rc = get_tpm(&dev); \
+ if (rc) \
+ return rc; \
if (argc != 1) \
return CMD_RET_USAGE; \
- return report_return_code(cmd()); \
+ return report_return_code(cmd(dev)); \
}
+/**
+ * tpm_open() - Request access to locality 0 for the caller
+ *
+ * After all commands have been completed the caller is supposed to
+ * call tpm_close().
+ *
+ * @dev - TPM device
+ * Returns 0 on success, -ve on failure.
+ */
+int tpm_open(struct udevice *dev);
+
+/**
+ * tpm_close() - Close the current session
+ *
+ * Releasing the locked locality. Returns 0 on success, -ve 1 on
+ * failure (in case lock removal did not succeed).
+ *
+ * @dev - TPM device
+ * Returns 0 on success, -ve on failure.
+ */
+int tpm_close(struct udevice *dev);
+
+/**
+ * tpm_clear_and_reenable() - Force clear the TPM and reenable it
+ *
+ * @dev: TPM device
+ * @return 0 on success, -ve on failure
+ */
+u32 tpm_clear_and_reenable(struct udevice *dev);
+
/**
* tpm_get_desc() - Get a text description of the TPM
*
* Note that the outgoing data is inspected to determine command type
* (ordinal) and a timeout is used for that command type.
*
+ * @dev - TPM device
* @sendbuf - buffer of the data to send
* @send_size size of the data to send
* @recvbuf - memory to save the response to
/**
* Initialize TPM device. It must be called before any TPM commands.
*
+ * @dev - TPM device
* @return 0 on success, non-0 on error.
*/
-int tpm_init(void);
+int tpm_init(struct udevice *dev);
/**
- * Retrieve the array containing all the commands.
+ * Retrieve the array containing all the v1 (resp. v2) commands.
*
* @return a cmd_tbl_t array.
*/
-cmd_tbl_t *get_tpm_commands(unsigned int *size);
+#if defined(CONFIG_TPM_V1)
+cmd_tbl_t *get_tpm1_commands(unsigned int *size);
+#else
+static inline cmd_tbl_t *get_tpm1_commands(unsigned int *size)
+{
+ return NULL;
+}
+#endif
+#if defined(CONFIG_TPM_V2)
+cmd_tbl_t *get_tpm2_commands(unsigned int *size);
+#else
+static inline cmd_tbl_t *get_tpm2_commands(unsigned int *size)
+{
+ return NULL;
+}
+#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 */