1 /* 2 * Copyright (C) 2004,2007,2008 IBM Corporation 3 * 4 * Authors: 5 * Leendert van Doorn <[email protected]> 6 * Dave Safford <[email protected]> 7 * Reiner Sailer <[email protected]> 8 * Kylene Hall <[email protected]> 9 * Debora Velarde <[email protected]> 10 * 11 * Maintained by: <[email protected]> 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 25 /* 26 * Chip num is this value or a valid tpm idx 27 */ 28 #define TPM_ANY_NUM 0xFFFF 29 30 #if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE) 31 32 extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf); 33 extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash); 34 #else 35 static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) { 36 return -ENODEV; 37 } 38 static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) { 39 return -ENODEV; 40 } 41 #endif 42 #endif 43