#include <linux/types.h>
enum tpm_timeout {
- TPM_TIMEOUT = 5, /* msecs */
+ TPM_TIMEOUT_MS = 5,
+ TIS_SHORT_TIMEOUT_MS = 750,
+ TIS_LONG_TIMEOUT_MS = 2000,
+ SLEEP_DURATION_US = 60,
+ SLEEP_DURATION_LONG_US = 210,
};
/* Size of external transmit buffer (used in tpm_transmit)*/
#define TPM_RSP_SIZE_BYTE 2
#define TPM_RSP_RC_BYTE 6
-/* Max buffer size supported by our tpm */
-#define TPM_DEV_BUFSIZE 1260
-
enum i2c_chip_type {
SLB9635,
SLB9645,
};
struct tpm_chip {
- bool inited;
int is_open;
- u8 req_complete_mask;
- u8 req_complete_val;
- u8 req_canceled;
- int irq;
int locality;
+ u32 vend_dev;
unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* msec */
- unsigned long duration[3]; /* msec */
- struct udevice *dev;
- u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */
enum i2c_chip_type chip_type;
};
union tpm_cmd_params params;
} __packed;
+/* Max number of iterations after i2c NAK */
+#define MAX_COUNT 3
+
+/*
+ * Max number of iterations after i2c NAK for 'long' commands
+ *
+ * We need this especially for sending TPM_READY, since the cleanup after the
+ * transtion to the ready state may take some time, but it is unpredictable
+ * how long it will take.
+ */
+#define MAX_COUNT_LONG 50
+
+enum tis_access {
+ TPM_ACCESS_VALID = 0x80,
+ TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
+ TPM_ACCESS_REQUEST_PENDING = 0x04,
+ TPM_ACCESS_REQUEST_USE = 0x02,
+};
+
+enum tis_status {
+ TPM_STS_VALID = 0x80,
+ TPM_STS_COMMAND_READY = 0x40,
+ TPM_STS_GO = 0x20,
+ TPM_STS_DATA_AVAIL = 0x10,
+ TPM_STS_DATA_EXPECT = 0x08,
+};
+
+/* expected value for DIDVID register */
+#define TPM_TIS_I2C_DID_VID_9635 0x000b15d1L
+#define TPM_TIS_I2C_DID_VID_9645 0x001a15d1L
+
+#define TPM_ACCESS(l) (0x0000 | ((l) << 4))
+#define TPM_STS(l) (0x0001 | ((l) << 4))
+#define TPM_DATA_FIFO(l) (0x0005 | ((l) << 4))
+#define TPM_DID_VID(l) (0x0006 | ((l) << 4))
+
#endif