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Diffstat (limited to 'src/drivers/i2c/tpm/tis.h')
-rw-r--r-- | src/drivers/i2c/tpm/tis.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/drivers/i2c/tpm/tis.h b/src/drivers/i2c/tpm/tis.h new file mode 100644 index 0000000000..348f9a8019 --- /dev/null +++ b/src/drivers/i2c/tpm/tis.h @@ -0,0 +1,74 @@ +/* + * Copyright 2011 Google Inc. + * + * 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 __DRIVERS_TPM_TPM_H__ +#define __DRIVERS_TPM_TPM_H__ + +#include <stddef.h> +#include <stdint.h> + +void tis_set_i2c_bus(unsigned _bus); + +/* + * 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 /* __DRIVERS_TPM_TPM_H__ */ |