diff options
Diffstat (limited to 'drivers/tpm/slb9635_i2c/tpm.h')
| -rw-r--r-- | drivers/tpm/slb9635_i2c/tpm.h | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/drivers/tpm/slb9635_i2c/tpm.h b/drivers/tpm/slb9635_i2c/tpm.h new file mode 100644 index 0000000000..9ddee865df --- /dev/null +++ b/drivers/tpm/slb9635_i2c/tpm.h @@ -0,0 +1,161 @@ +/* + * 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_H_ +#define _TPM_H_ + +#include <linux/compiler.h> + +#include "compatibility.h" + +enum tpm_timeout { + TPM_TIMEOUT = 5, /* msecs */ +}; + +/* Size of external transmit buffer (used in tpm_transmit)*/ +#define TPM_BUFSIZE 4096 + +/* Index of fields in TPM command buffer */ +#define TPM_CMD_SIZE_BYTE 2 +#define TPM_CMD_ORDINAL_BYTE 6 + +/* 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; + + +/* ---------- Interface for TPM vendor ------------ */ + +extern struct tpm_chip *tpm_register_hardware( + const struct tpm_vendor_specific *); + +extern int tpm_vendor_init(uint32_t dev_addr); + +extern void tpm_vendor_cleanup(struct tpm_chip *chip); + +/* ---------- Interface for TDDL ------------------- */ + +/* + * if dev_addr != 0 - redefines TPM device address + * Returns < 0 on error, 0 on success. + */ +extern int tpm_open(uint32_t dev_addr); + +extern void tpm_close(void); + +/* + * Transmit bufsiz bytes out of buf to TPM and get results back in buf, too. + * Returns < 0 on error, 0 on success. + */ +extern ssize_t tpm_transmit(const unsigned char *buf, size_t bufsiz); + +#endif |
