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

/*
 * Copyright (c) 2011 The Chromium OS Authors.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef __TIS_H
#define __TIS_H

#include <common.h>

/* Low-level interface to access TPM */

/*
 * 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 /* __TIS_H */
Commit	Line	Data
8732b070 CC	1	/*
	2	* Copyright (c) 2011 The Chromium OS Authors.
	3	*
1a459660	4	* SPDX-License-Identifier: GPL-2.0+
8732b070 CC	5	*/
	6
	7	#ifndef __TIS_H
	8	#define __TIS_H
	9
	10	#include <common.h>
	11
	12	/* Low-level interface to access TPM */
	13
	14	/*
	15	* tis_init()
	16	*
	17	* Initialize the TPM device. Returns 0 on success or -1 on
	18	* failure (in case device probing did not succeed).
	19	*/
	20	int tis_init(void);
	21
	22	/*
	23	* tis_open()
	24	*
	25	* Requests access to locality 0 for the caller. After all commands have been
	26	* completed the caller is supposed to call tis_close().
	27	*
	28	* Returns 0 on success, -1 on failure.
	29	*/
	30	int tis_open(void);
	31
	32	/*
	33	* tis_close()
	34	*
	35	* terminate the currect session with the TPM by releasing the locked
	36	* locality. Returns 0 on success of -1 on failure (in case lock
	37	* removal did not succeed).
	38	*/
	39	int tis_close(void);
	40
	41	/*
	42	* tis_sendrecv()
	43	*
	44	* Send the requested data to the TPM and then try to get its response
	45	*
	46	* @sendbuf - buffer of the data to send
	47	* @send_size size of the data to send
	48	* @recvbuf - memory to save the response to
	49	* @recv_len - pointer to the size of the response buffer
	50	*
	51	* Returns 0 on success (and places the number of response bytes at recv_len)
	52	* or -1 on failure.
	53	*/
	54	int tis_sendrecv(const uint8_t sendbuf, size_t send_size, uint8_t recvbuf,
	55	size_t *recv_len);
	56
	57	#endif /* __TIS_H */