0ca944b16f
Change-Id: I1c09eda6164efb390de4626f52aafba59962f9c4 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/37029 Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr> Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
94 lines
1.7 KiB
C
94 lines
1.7 KiB
C
/*
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* Copyright 2016 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include <console/console.h>
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#include <security/tpm/tis.h>
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#include "tpm.h"
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static unsigned tpm_is_open;
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static const struct {
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uint16_t vid;
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uint16_t did;
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const char *device_name;
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} dev_map[] = {
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{ 0x15d1, 0x001b, "SLB9670" },
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{ 0x1ae0, 0x0028, "CR50" },
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};
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static const char *tis_get_dev_name(struct tpm2_info *info)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(dev_map); i++)
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if ((dev_map[i].vid == info->vendor_id) &&
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(dev_map[i].did == info->device_id))
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return dev_map[i].device_name;
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return "Unknown";
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}
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int tis_open(void)
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{
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if (tpm_is_open) {
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printk(BIOS_ERR, "tis_open() called twice.\n");
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return -1;
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}
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return 0;
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}
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int tis_close(void)
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{
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if (tpm_is_open) {
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/*
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* Do we need to do something here, like waiting for a
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* transaction to stop?
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*/
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tpm_is_open = 0;
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}
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return 0;
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}
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int tis_init(void)
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{
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struct spi_slave spi;
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struct tpm2_info info;
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if (spi_setup_slave(CONFIG_DRIVER_TPM_SPI_BUS,
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CONFIG_DRIVER_TPM_SPI_CHIP, &spi)) {
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printk(BIOS_ERR, "Failed to setup TPM SPI slave\n");
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return -1;
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}
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if (tpm2_init(&spi)) {
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printk(BIOS_ERR, "Failed to initialize TPM SPI interface\n");
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return -1;
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}
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tpm2_get_info(&info);
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printk(BIOS_INFO, "Initialized TPM device %s revision %d\n",
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tis_get_dev_name(&info), info.revision);
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return 0;
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}
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int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
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uint8_t *recvbuf, size_t *rbuf_len)
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{
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int len = tpm2_process_command(sendbuf, sbuf_size, recvbuf, *rbuf_len);
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if (len == 0)
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return -1;
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*rbuf_len = len;
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return 0;
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}
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