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#ifndef TPM_DRIVERS_H
#define TPM_DRIVERS_H
#include "types.h" // u32
enum tpmDurationType {
TPM_DURATION_TYPE_SHORT = 0,
TPM_DURATION_TYPE_MEDIUM,
TPM_DURATION_TYPE_LONG,
};
typedef u8 TPMVersion;
#define TPM_VERSION_NONE 0
#define TPM_VERSION_1_2 1
#define TPM_VERSION_2 2
TPMVersion tpmhw_probe(void);
int tpmhw_is_present(void);
struct tpm_req_header;
int tpmhw_transmit(u8 locty, struct tpm_req_header *req,
void *respbuffer, u32 *respbufferlen,
enum tpmDurationType to_t);
void tpmhw_set_timeouts(u32 timeouts[4], u32 durations[3]);
/* TIS driver */
/* address of locality 0 (TIS) */
#define TPM_TIS_BASE_ADDRESS 0xfed40000
#define TIS_REG(LOCTY, REG) \
(void *)(TPM_TIS_BASE_ADDRESS + (LOCTY << 12) + REG)
/* hardware registers */
#define TIS_REG_ACCESS 0x0
#define TIS_REG_INT_ENABLE 0x8
#define TIS_REG_INT_VECTOR 0xc
#define TIS_REG_INT_STATUS 0x10
#define TIS_REG_INTF_CAPABILITY 0x14
#define TIS_REG_STS 0x18
#define TIS_REG_DATA_FIFO 0x24
#define TIS_REG_IFACE_ID 0x30
#define TIS_REG_DID_VID 0xf00
#define TIS_REG_RID 0xf04
#define TIS_STS_VALID (1 << 7) /* 0x80 */
#define TIS_STS_COMMAND_READY (1 << 6) /* 0x40 */
#define TIS_STS_TPM_GO (1 << 5) /* 0x20 */
#define TIS_STS_DATA_AVAILABLE (1 << 4) /* 0x10 */
#define TIS_STS_EXPECT (1 << 3) /* 0x08 */
#define TIS_STS_RESPONSE_RETRY (1 << 1) /* 0x02 */
#define TIS_ACCESS_TPM_REG_VALID_STS (1 << 7) /* 0x80 */
#define TIS_ACCESS_ACTIVE_LOCALITY (1 << 5) /* 0x20 */
#define TIS_ACCESS_BEEN_SEIZED (1 << 4) /* 0x10 */
#define TIS_ACCESS_SEIZE (1 << 3) /* 0x08 */
#define TIS_ACCESS_PENDING_REQUEST (1 << 2) /* 0x04 */
#define TIS_ACCESS_REQUEST_USE (1 << 1) /* 0x02 */
#define TIS_ACCESS_TPM_ESTABLISHMENT (1 << 0) /* 0x01 */
/*
* Default TIS timeouts used before getting them from the TPM itself
*/
#define TIS_DEFAULT_TIMEOUT_A 750000 /* us */
#define TIS_DEFAULT_TIMEOUT_B 2000000 /* us */
#define TIS_DEFAULT_TIMEOUT_C 750000 /* us */
#define TIS_DEFAULT_TIMEOUT_D 750000 /* us */
enum tisTimeoutType {
TIS_TIMEOUT_TYPE_A = 0,
TIS_TIMEOUT_TYPE_B,
TIS_TIMEOUT_TYPE_C,
TIS_TIMEOUT_TYPE_D,
};
/*
* Default command durations used before getting them from the
* TPM itself
*/
#define TPM_DEFAULT_DURATION_SHORT 2000000 /* us */
#define TPM_DEFAULT_DURATION_MEDIUM 20000000 /* us */
#define TPM_DEFAULT_DURATION_LONG 60000000 /* us */
#endif /* TPM_DRIVERS_H */
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