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/*
* Copyright (C) 2011 Infineon Technologies
*
* Authors:
* Peter Huewe <huewe.external@infineon.com>
*
* Version: 2.1.1
*
* Description:
* Device driver for TCG/TCPA TPM (trusted platform module).
* Specifications at www.trustedcomputinggroup.org
*
* It is based on the Linux kernel driver tpm.c from Leendert van
* Dorn, Dave Safford, Reiner Sailer, and Kyleen Hall.
*
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef _TPM_PRIVATE_H_
#define _TPM_PRIVATE_H_
#include <linux/compiler.h>
#include <linux/types.h>
enum tpm_timeout {
TPM_TIMEOUT = 5, /* msecs */
};
/* Size of external transmit buffer (used in tpm_transmit)*/
#define TPM_BUFSIZE 4096
/* Index of Count field in TPM response buffer */
#define TPM_RSP_SIZE_BYTE 2
#define TPM_RSP_RC_BYTE 6
struct tpm_chip;
struct tpm_vendor_specific {
const u8 req_complete_mask;
const u8 req_complete_val;
const u8 req_canceled;
int irq;
int (*recv) (struct tpm_chip *, u8 *, size_t);
int (*send) (struct tpm_chip *, u8 *, size_t);
void (*cancel) (struct tpm_chip *);
u8(*status) (struct tpm_chip *);
int locality;
unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* msec */
unsigned long duration[3]; /* msec */
};
struct tpm_chip {
int is_open;
struct tpm_vendor_specific vendor;
};
struct tpm_input_header {
__be16 tag;
__be32 length;
__be32 ordinal;
} __packed;
struct tpm_output_header {
__be16 tag;
__be32 length;
__be32 return_code;
} __packed;
struct timeout_t {
__be32 a;
__be32 b;
__be32 c;
__be32 d;
} __packed;
struct duration_t {
__be32 tpm_short;
__be32 tpm_medium;
__be32 tpm_long;
} __packed;
union cap_t {
struct timeout_t timeout;
struct duration_t duration;
};
struct tpm_getcap_params_in {
__be32 cap;
__be32 subcap_size;
__be32 subcap;
} __packed;
struct tpm_getcap_params_out {
__be32 cap_size;
union cap_t cap;
} __packed;
union tpm_cmd_header {
struct tpm_input_header in;
struct tpm_output_header out;
};
union tpm_cmd_params {
struct tpm_getcap_params_out getcap_out;
struct tpm_getcap_params_in getcap_in;
};
struct tpm_cmd_t {
union tpm_cmd_header header;
union tpm_cmd_params params;
} __packed;
struct tpm_chip *tpm_register_hardware(const struct tpm_vendor_specific *);
int tpm_vendor_init(uint32_t dev_addr);
void tpm_vendor_cleanup(struct tpm_chip *chip);
#endif
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