[J-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

#ifndef CONFIG_DM_TPM

#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

#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
f255d31f SG	10	#ifndef CONFIG_DM_TPM
f255d31f SG	11
8732b070 CC	12	#include <common.h>
	13
	14	/* Low-level interface to access TPM */
	15
	16	/*
	17	* tis_init()
	18	*
	19	* Initialize the TPM device. Returns 0 on success or -1 on
	20	* failure (in case device probing did not succeed).
	21	*/
	22	int tis_init(void);
	23
	24	/*
	25	* tis_open()
	26	*
	27	* Requests access to locality 0 for the caller. After all commands have been
	28	* completed the caller is supposed to call tis_close().
	29	*
	30	* Returns 0 on success, -1 on failure.
	31	*/
	32	int tis_open(void);
	33
	34	/*
	35	* tis_close()
	36	*
	37	* terminate the currect session with the TPM by releasing the locked
	38	* locality. Returns 0 on success of -1 on failure (in case lock
	39	* removal did not succeed).
	40	*/
	41	int tis_close(void);
	42
	43	/*
	44	* tis_sendrecv()
	45	*
	46	* Send the requested data to the TPM and then try to get its response
	47	*
	48	* @sendbuf - buffer of the data to send
	49	* @send_size size of the data to send
	50	* @recvbuf - memory to save the response to
	51	* @recv_len - pointer to the size of the response buffer
	52	*
	53	* Returns 0 on success (and places the number of response bytes at recv_len)
	54	* or -1 on failure.
	55	*/
	56	int tis_sendrecv(const uint8_t sendbuf, size_t send_size, uint8_t recvbuf,
	57	size_t *recv_len);
f255d31f	58	#endif
8732b070 CC	59
8732b070 CC	60	#endif /* __TIS_H */