| /* | |
| * Copyright (C) 2004,2007,2008 IBM Corporation | |
| * | |
| * Authors: | |
| * Leendert van Doorn <[email protected]> | |
| * Dave Safford <[email protected]> | |
| * Reiner Sailer <[email protected]> | |
| * Kylene Hall <[email protected]> | |
| * Debora Velarde <[email protected]> | |
| * | |
| * Maintained by: <[email protected]> | |
| * | |
| * Device driver for TCG/TCPA TPM (trusted platform module). | |
| * Specifications at www.trustedcomputinggroup.org | |
| * | |
| * 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. | |
| * | |
| */ | |
| #ifndef __LINUX_TPM_H__ | |
| #define __LINUX_TPM_H__ | |
| #define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */ | |
| /* | |
| * Chip num is this value or a valid tpm idx | |
| */ | |
| #define TPM_ANY_NUM 0xFFFF | |
| struct tpm_chip; | |
| struct tpm_class_ops { | |
| const u8 req_complete_mask; | |
| const u8 req_complete_val; | |
| bool (*req_canceled)(struct tpm_chip *chip, u8 status); | |
| int (*recv) (struct tpm_chip *chip, u8 *buf, size_t len); | |
| int (*send) (struct tpm_chip *chip, u8 *buf, size_t len); | |
| void (*cancel) (struct tpm_chip *chip); | |
| u8 (*status) (struct tpm_chip *chip); | |
| bool (*update_timeouts)(struct tpm_chip *chip, | |
| unsigned long *timeout_cap); | |
| }; | |
| #if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE) | |
| extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf); | |
| extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash); | |
| extern int tpm_send(u32 chip_num, void *cmd, size_t buflen); | |
| extern int tpm_get_random(u32 chip_num, u8 *data, size_t max); | |
| #else | |
| static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) { | |
| return -ENODEV; | |
| } | |
| static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) { | |
| return -ENODEV; | |
| } | |
| static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) { | |
| return -ENODEV; | |
| } | |
| static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) { | |
| return -ENODEV; | |
| } | |
| #endif | |
| #endif |