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gerrit-public.fairphone.software / kernel / msm-4.9 / c1fa3426aa5c782724c97394303d52228206eda4 / . / include / linux / tpm.h
blob: 9a9051bb1a03be1ad8df3bc407ee9f8895df8a07 [file] [log] [blame]
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200[diff] [blame]1/*
2 * Copyright (C) 2004,2007,2008 IBM Corporation
3 *
4 * Authors:
5 * Leendert van Doorn <leendert@watson.ibm.com>
6 * Dave Safford <safford@watson.ibm.com>
7 * Reiner Sailer <sailer@watson.ibm.com>
8 * Kylene Hall <kjhall@us.ibm.com>
9 * Debora Velarde <dvelarde@us.ibm.com>
10 *
11 * Maintained by: <tpmdd_devel@lists.sourceforge.net>
12 *
13 * Device driver for TCG/TCPA TPM (trusted platform module).
14 * Specifications at www.trustedcomputinggroup.org
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation, version 2 of the
19 * License.
20 *
21 */
22#ifndef __LINUX_TPM_H__
23#define __LINUX_TPM_H__
24
Mimi Zohar1c16c962013-05-21 10:40:47 -0400[diff] [blame]25#define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */
26
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200[diff] [blame]27/*
28 * Chip num is this value or a valid tpm idx
29 */
30#define TPM_ANY_NUM 0xFFFF
31
Randy Dunlapff76ec12009-10-28 12:26:39 -0700[diff] [blame]32#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200[diff] [blame]33
34extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);
35extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash);
Mimi Zoharc749ba92010-11-23 18:54:16 -0500[diff] [blame]36extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
Kent Yoder41ab9992012-06-07 13:47:14 -0500[diff] [blame]37extern int tpm_get_random(u32 chip_num, u8 *data, size_t max);
Mimi Zohard6ba4522009-10-26 09:26:18 -0400[diff] [blame]38#else
39static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
40 return -ENODEV;
41}
42static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) {
43 return -ENODEV;
44}
Mimi Zoharc749ba92010-11-23 18:54:16 -0500[diff] [blame]45static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
46 return -ENODEV;
47}
Kent Yoder41ab9992012-06-07 13:47:14 -0500[diff] [blame]48static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) {
49 return -ENODEV;
50}
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200[diff] [blame]51#endif
52#endif