diff options
Diffstat (limited to 'src/drivers/i2c/tpm/tis_i2c.c')
-rw-r--r-- | src/drivers/i2c/tpm/tis_i2c.c | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/src/drivers/i2c/tpm/tis_i2c.c b/src/drivers/i2c/tpm/tis_i2c.c deleted file mode 100644 index 59971a2631..0000000000 --- a/src/drivers/i2c/tpm/tis_i2c.c +++ /dev/null @@ -1,103 +0,0 @@ -/* - * Copyright 2013 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 - */ - -#include <stdint.h> -#include <string.h> -#include <device/i2c.h> -#include "tis.h" -#include "tpm.h" - -static unsigned bus = 0; - -static int opened; - -void tis_set_i2c_bus(unsigned _bus) -{ - bus = _bus; -} - -int tis_open(void) -{ - opened = 1; - if (tpm_open(bus, CONFIG_DRIVER_TPM_I2C_ADDR)) { - opened = 0; - return -1; - } - return 0; -} - -int tis_close(void) -{ - opened = 0; - tpm_close(); - return 0; -} - -int tis_init(void) -{ - int chip = CONFIG_DRIVER_TPM_I2C_ADDR; - - /* - * Probe TPM twice; the first probing might fail because TPM is asleep, - * and the probing can wake up TPM. - */ - uint8_t tmp; - if (!bus) - return -1; - - if (i2c_read(bus, chip, 0, 0, &tmp, sizeof(tmp)) && - i2c_read(bus, chip, 0, 0, &tmp, sizeof(tmp))) - return -1; - - return 0; -} - -int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size, - uint8_t *recvbuf, size_t *rbuf_len) -{ - uint8_t buf[TPM_BUFSIZE]; - - if (!opened && tis_open()) - return -1; - - if (sizeof(buf) < sbuf_size) - return -1; - - memcpy(buf, sendbuf, sbuf_size); - - int len = tpm_transmit(buf, sbuf_size); - - if (len < 10) { - *rbuf_len = 0; - return -1; - } - - if (len > *rbuf_len) { - *rbuf_len = len; - return -1; - } - - memcpy(recvbuf, buf, len); - *rbuf_len = len; - - return 0; -} |