| /* |
| * 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. |
| */ |
| |
| #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_ */ |