diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tpm/Makefile | 2 | ||||
| -rw-r--r-- | drivers/tpm/tis_i2c.c | 185 |
2 files changed, 0 insertions, 187 deletions
diff --git a/drivers/tpm/Makefile b/drivers/tpm/Makefile index 4b8cbec..2f2353f 100644 --- a/drivers/tpm/Makefile +++ b/drivers/tpm/Makefile @@ -3,8 +3,6 @@ # SPDX-License-Identifier: GPL-2.0+ # -$(shell mkdir -p $(obj)slb9635_i2c) - # TODO: Merge tpm_tis_lpc.c with tpm.c obj-$(CONFIG_TPM_ATMEL_TWI) += tpm_atmel_twi.o obj-$(CONFIG_TPM_TIS_I2C) += tpm.o diff --git a/drivers/tpm/tis_i2c.c b/drivers/tpm/tis_i2c.c deleted file mode 100644 index 22554e1..0000000 --- a/drivers/tpm/tis_i2c.c +++ /dev/null @@ -1,185 +0,0 @@ -/* - * Copyright (c) 2012 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#include <config.h> -#include <common.h> -#include <fdtdec.h> -#include <i2c.h> -#include "slb9635_i2c/tpm.h" - -DECLARE_GLOBAL_DATA_PTR; - -/* TPM configuration */ -struct tpm { - int i2c_bus; - int slave_addr; - char inited; - int old_bus; -} tpm; - - -static int tpm_select(void) -{ - int ret; - - tpm.old_bus = i2c_get_bus_num(); - if (tpm.old_bus != tpm.i2c_bus) { - ret = i2c_set_bus_num(tpm.i2c_bus); - if (ret) { - debug("%s: Fail to set i2c bus %d\n", __func__, - tpm.i2c_bus); - return -1; - } - } - return 0; -} - -static int tpm_deselect(void) -{ - int ret; - - if (tpm.old_bus != i2c_get_bus_num()) { - ret = i2c_set_bus_num(tpm.old_bus); - if (ret) { - debug("%s: Fail to restore i2c bus %d\n", - __func__, tpm.old_bus); - return -1; - } - } - tpm.old_bus = -1; - return 0; -} - -/** - * Decode TPM configuration. - * - * @param dev Returns a configuration of TPM device - * @return 0 if ok, -1 on error - */ -static int tpm_decode_config(struct tpm *dev) -{ -#ifdef CONFIG_OF_CONTROL - const void *blob = gd->fdt_blob; - int node, parent; - int i2c_bus; - - node = fdtdec_next_compatible(blob, 0, COMPAT_INFINEON_SLB9635_TPM); - if (node < 0) { - node = fdtdec_next_compatible(blob, 0, - COMPAT_INFINEON_SLB9645_TPM); - } - if (node < 0) { - debug("%s: Node not found\n", __func__); - return -1; - } - parent = fdt_parent_offset(blob, node); - if (parent < 0) { - debug("%s: Cannot find node parent\n", __func__); - return -1; - } - i2c_bus = i2c_get_bus_num_fdt(parent); - if (i2c_bus < 0) - return -1; - dev->i2c_bus = i2c_bus; - dev->slave_addr = fdtdec_get_addr(blob, node, "reg"); -#else - dev->i2c_bus = CONFIG_INFINEON_TPM_I2C_BUS; - dev->slave_addr = CONFIG_INFINEON_TPM_I2C_ADDR; -#endif - return 0; -} - -int tis_init(void) -{ - if (tpm.inited) - return 0; - - if (tpm_decode_config(&tpm)) - return -1; - - if (tpm_select()) - return -1; - - /* - * Probe TPM twice; the first probing might fail because TPM is asleep, - * and the probing can wake up TPM. - */ - if (i2c_probe(tpm.slave_addr) && i2c_probe(tpm.slave_addr)) { - debug("%s: fail to probe i2c addr 0x%x\n", __func__, - tpm.slave_addr); - return -1; - } - - tpm_deselect(); - - tpm.inited = 1; - - return 0; -} - -int tis_open(void) -{ - int rc; - - if (!tpm.inited) - return -1; - - if (tpm_select()) - return -1; - - rc = tpm_open(tpm.slave_addr); - - tpm_deselect(); - - return rc; -} - -int tis_close(void) -{ - if (!tpm.inited) - return -1; - - if (tpm_select()) - return -1; - - tpm_close(); - - tpm_deselect(); - - return 0; -} - -int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size, - uint8_t *recvbuf, size_t *rbuf_len) -{ - int len; - uint8_t buf[4096]; - - if (!tpm.inited) - return -1; - - if (sizeof(buf) < sbuf_size) - return -1; - - memcpy(buf, sendbuf, sbuf_size); - - if (tpm_select()) - return -1; - - len = tpm_transmit(buf, sbuf_size); - - tpm_deselect(); - - if (len < 10) { - *rbuf_len = 0; - return -1; - } - - memcpy(recvbuf, buf, len); - *rbuf_len = len; - - return 0; -} |