[people/ms/u-boot.git] / include / tpm.h

/*
 * Copyright (c) 2011 The Chromium OS Authors.
 *
 * 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; either version 2 of
 * the License, or (at your option) any later version.
 *
 * 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 _INCLUDE_TPM_H_
#define _INCLUDE_TPM_H_

#include <common.h>

/*
 * tis_init()
 *
 * Initialize the TPM device. Returns 0 on success or -1 on
 * failure (in case device probing did not succeed).
 */
int tis_init(void);

/*
 * tis_open()
 *
 * Requests access to locality 0 for the caller. After all commands have been
 * completed the caller is supposed to call tis_close().
 *
 * Returns 0 on success, -1 on failure.
 */
int tis_open(void);

/*
 * tis_close()
 *
 * terminate the currect session with the TPM by releasing the locked
 * locality. Returns 0 on success of -1 on failure (in case lock
 * removal did not succeed).
 */
int tis_close(void);

/*
 * tis_sendrecv()
 *
 * Send the requested data to the TPM and then try to get its response
 *
 * @sendbuf - buffer of the data to send
 * @send_size size of the data to send
 * @recvbuf - memory to save the response to
 * @recv_len - pointer to the size of the response buffer
 *
 * Returns 0 on success (and places the number of response bytes at recv_len)
 * or -1 on failure.
 */
int tis_sendrecv(const uint8_t *sendbuf, size_t send_size, uint8_t *recvbuf,
			size_t *recv_len);

#endif /* _INCLUDE_TPM_H_ */
Commit	Line	Data
5e124724 VB	1	/*
	2	* Copyright (c) 2011 The Chromium OS Authors.
	3	*
	4	* See file CREDITS for list of people who contributed to this
	5	* project.
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License as
	9	* published by the Free Software Foundation; either version 2 of
	10	* the License, or (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	20	* MA 02111-1307 USA
	21	*/
	22
	23	#ifndef _INCLUDE_TPM_H_
	24	#define _INCLUDE_TPM_H_
	25
	26	#include <common.h>
	27
	28	/*
	29	* tis_init()
	30	*
	31	* Initialize the TPM device. Returns 0 on success or -1 on
	32	* failure (in case device probing did not succeed).
	33	*/
	34	int tis_init(void);
	35
	36	/*
	37	* tis_open()
	38	*
	39	* Requests access to locality 0 for the caller. After all commands have been
	40	* completed the caller is supposed to call tis_close().
	41	*
	42	* Returns 0 on success, -1 on failure.
	43	*/
	44	int tis_open(void);
	45
	46	/*
	47	* tis_close()
	48	*
	49	* terminate the currect session with the TPM by releasing the locked
	50	* locality. Returns 0 on success of -1 on failure (in case lock
	51	* removal did not succeed).
	52	*/
	53	int tis_close(void);
	54
	55	/*
	56	* tis_sendrecv()
	57	*
	58	* Send the requested data to the TPM and then try to get its response
	59	*
	60	* @sendbuf - buffer of the data to send
	61	* @send_size size of the data to send
	62	* @recvbuf - memory to save the response to
	63	* @recv_len - pointer to the size of the response buffer
	64	*
65	* Returns 0 on success (and places the number of response bytes at recv_len)
66	* or -1 on failure.
67	*/
68	int tis_sendrecv(const uint8_t sendbuf, size_t send_size, uint8_t recvbuf,
69	size_t *recv_len);
70
71	#endif /* _INCLUDE_TPM_H_ */