projects / J-u-boot.git / blame
| 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 */ |