/*
* 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

#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