blob: 6b21e9c7349c298c6fc9253324112db58935f805 [file] [log] [blame]
Vadim Bendebury5e124722011-10-17 08:36:14 +00001/*
2 * Copyright (c) 2011 The Chromium OS Authors.
3 *
4 * See file CREDITS for list of people who contributed to this
5 * project.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 * MA 02111-1307 USA
21 */
22
23#ifndef _INCLUDE_TPM_H_
24#define _INCLUDE_TPM_H_
25
26#include <common.h>
27
28/*
29 * tis_init()
30 *
31 * Initialize the TPM device. Returns 0 on success or -1 on
32 * failure (in case device probing did not succeed).
33 */
34int tis_init(void);
35
36/*
37 * tis_open()
38 *
39 * Requests access to locality 0 for the caller. After all commands have been
40 * completed the caller is supposed to call tis_close().
41 *
42 * Returns 0 on success, -1 on failure.
43 */
44int tis_open(void);
45
46/*
47 * tis_close()
48 *
49 * terminate the currect session with the TPM by releasing the locked
50 * locality. Returns 0 on success of -1 on failure (in case lock
51 * removal did not succeed).
52 */
53int tis_close(void);
54
55/*
56 * tis_sendrecv()
57 *
58 * Send the requested data to the TPM and then try to get its response
59 *
60 * @sendbuf - buffer of the data to send
61 * @send_size size of the data to send
62 * @recvbuf - memory to save the response to
63 * @recv_len - pointer to the size of the response buffer
64 *
65 * Returns 0 on success (and places the number of response bytes at recv_len)
66 * or -1 on failure.
67 */
68int tis_sendrecv(const uint8_t *sendbuf, size_t send_size, uint8_t *recvbuf,
69 size_t *recv_len);
70
71#endif /* _INCLUDE_TPM_H_ */