/* * Copyright (c) 2011 The Chromium OS Authors. * * SPDX-License-Identifier: GPL-2.0+ */ #ifndef __TIS_H #define __TIS_H #include <common.h> /* Low-level interface to access TPM */ /* * tis_init() * * Initialize the TPM device. Returns 0 on success or -1 on * failure (in case device probing did not succeed). */ int tis_init(void); /* * tis_open() * * Requests access to locality 0 for the caller. After all commands have been * completed the caller is supposed to call tis_close(). * * Returns 0 on success, -1 on failure. */ int tis_open(void); /* * tis_close() * * terminate the currect session with the TPM by releasing the locked * locality. Returns 0 on success of -1 on failure (in case lock * removal did not succeed). */ int tis_close(void); /* * tis_sendrecv() * * Send the requested data to the TPM and then try to get its response * * @sendbuf - buffer of the data to send * @send_size size of the data to send * @recvbuf - memory to save the response to * @recv_len - pointer to the size of the response buffer * * Returns 0 on success (and places the number of response bytes at recv_len) * or -1 on failure. */ int tis_sendrecv(const uint8_t *sendbuf, size_t send_size, uint8_t *recvbuf, size_t *recv_len); #endif /* __TIS_H */