mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
8e54caf407
Some Atmel TPMs provide completely wrong timeouts from their TPM_CAP_PROP_TIS_TIMEOUT query. This patch detects that and returns new correct values via a DID/VID table in the TIS driver. Tested on ARM using an AT97SC3204T FW version 37.16 Cc: <stable@vger.kernel.org> [PHuewe: without this fix these 'broken' Atmel TPMs won't function on older kernels] Signed-off-by: "Berg, Christopher" <Christopher.Berg@atmel.com> Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/*
|
|
* Copyright (C) 2004,2007,2008 IBM Corporation
|
|
*
|
|
* Authors:
|
|
* Leendert van Doorn <leendert@watson.ibm.com>
|
|
* Dave Safford <safford@watson.ibm.com>
|
|
* Reiner Sailer <sailer@watson.ibm.com>
|
|
* Kylene Hall <kjhall@us.ibm.com>
|
|
* Debora Velarde <dvelarde@us.ibm.com>
|
|
*
|
|
* Maintained by: <tpmdd_devel@lists.sourceforge.net>
|
|
*
|
|
* 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
|