/* * This file is part of the coreboot project. * * Copyright 2011 Google Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef TPM_H_ #define TPM_H_ #include <stddef.h> #include <stdint.h> /* * 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 u8 *sendbuf, size_t send_size, u8 *recvbuf, size_t *recv_len); #endif /* TPM_H_ */