LXR uboot/include/tpm.h

   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 */
  34int 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 */
  44int 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 */
  53int 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 */
  68int tis_sendrecv(const uint8_t *sendbuf, size_t send_size, uint8_t *recvbuf,
  69                        size_t *recv_len);
  70
  71#endif /* _INCLUDE_TPM_H_ */
  72