| /* SPDX-License-Identifier: BSD-3-Clause */ |
| |
| #include <console/console.h> |
| #include <security/tpm/tis.h> |
| |
| #include "tpm.h" |
| |
| static unsigned int tpm_is_open; |
| |
| static const struct { |
| uint16_t vid; |
| uint16_t did; |
| const char *device_name; |
| } dev_map[] = { |
| { 0x15d1, 0x001b, "SLB9670" }, |
| { 0x1ae0, 0x0028, "CR50" }, |
| { 0x104a, 0x0000, "ST33HTPH2E32" }, |
| { 0x6666, 0x504a, "TI50" }, |
| }; |
| |
| static const char *tis_get_dev_name(struct tpm2_info *info) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(dev_map); i++) |
| if ((dev_map[i].vid == info->vendor_id) && |
| (dev_map[i].did == info->device_id)) |
| return dev_map[i].device_name; |
| return "Unknown"; |
| } |
| |
| int tis_open(void) |
| { |
| if (tpm_is_open) { |
| printk(BIOS_ERR, "%s() called twice.\n", __func__); |
| return -1; |
| } |
| return 0; |
| } |
| |
| int tis_init(void) |
| { |
| struct spi_slave spi; |
| struct tpm2_info info; |
| |
| if (spi_setup_slave(CONFIG_DRIVER_TPM_SPI_BUS, |
| CONFIG_DRIVER_TPM_SPI_CHIP, &spi)) { |
| printk(BIOS_ERR, "Failed to setup TPM SPI slave\n"); |
| return -1; |
| } |
| |
| if (tpm2_init(&spi)) { |
| printk(BIOS_ERR, "Failed to initialize TPM SPI interface\n"); |
| return -1; |
| } |
| |
| tpm2_get_info(&info); |
| |
| printk(BIOS_INFO, "Initialized TPM device %s revision %d\n", |
| tis_get_dev_name(&info), info.revision); |
| |
| return 0; |
| } |
| |
| int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size, |
| uint8_t *recvbuf, size_t *rbuf_len) |
| { |
| int len = tpm2_process_command(sendbuf, sbuf_size, recvbuf, *rbuf_len); |
| |
| if (len == 0) |
| return -1; |
| |
| *rbuf_len = len; |
| |
| return 0; |
| } |