/* SPDX-License-Identifier: GPL-2.0-only */ /* * Description: * Device driver for TCG/TCPA TPM (trusted platform module). * Specifications at www.trustedcomputinggroup.org * * It is based on the Linux kernel driver tpm.c from Leendert van * Dorn, Dave Safford, Reiner Sailer, and Kyleen Hall. */ #ifndef __DRIVERS_TPM_SLB9635_I2C_TPM_H__ #define __DRIVERS_TPM_SLB9635_I2C_TPM_H__ #include <security/tpm/tis.h> #include <security/tpm/tss_errors.h> #include <stdint.h> enum tpm_timeout { TPM_TIMEOUT = 1, /* msecs */ }; /* Size of external transmit buffer (used for stack buffer in tpm_sendrecv) */ #define TPM_BUFSIZE 1260 /* Number of bytes in the TPM header */ #define TPM_HEADER_SIZE 10 /* Index of fields in TPM command buffer */ #define TPM_CMD_SIZE_BYTE 2 #define TPM_CMD_ORDINAL_BYTE 6 /* Index of Count field in TPM response buffer */ #define TPM_RSP_SIZE_BYTE 2 #define TPM_RSP_RC_BYTE 6 #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)) struct tpm_chip { uint8_t req_complete_mask; uint8_t req_complete_val; uint8_t req_canceled; int (*recv)(uint8_t *buf, size_t len); int (*send)(uint8_t *buf, size_t len); void (*cancel)(void); uint8_t (*status)(void); }; /* ---------- Interface for TPM vendor ------------ */ tpm_result_t tpm_vendor_probe(unsigned int bus, uint32_t addr, enum tpm_family *family); tpm_result_t tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr); tis_sendrecv_fn i2c_tis_probe(enum tpm_family *family); #endif /* __DRIVERS_TPM_SLB9635_I2C_TPM_H__ */