/* SPDX-License-Identifier: GPL-2.0-only */ #include <console/console.h> #include <security/tpm/tis.h> #include <acpi/acpigen.h> #include <device/device.h> #include <drivers/intel/ptt/ptt.h> #include <drivers/tpm/tpm_ppi.h> #include <security/tpm/tss.h> #include <endian.h> #include <smbios.h> #include <string.h> #include "tpm.h" #include "chip.h" static const struct { uint16_t vid; uint16_t did; const char *device_name; } dev_map[] = { {0x1ae0, 0x0028, "CR50"}, {0xa13a, 0x8086, "Intel iTPM"} }; static const char *tis_get_dev_name(struct crb_tpm_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"; } static tpm_result_t crb_tpm_sendrecv(const uint8_t *sendbuf, size_t sbuf_size, uint8_t *recvbuf, size_t *rbuf_len) { int len = crb_tpm_process_command(sendbuf, sbuf_size, recvbuf, *rbuf_len); if (len == 0) return TPM_CB_FAIL; *rbuf_len = len; return TPM_SUCCESS; } tis_sendrecv_fn crb_tis_probe(enum tpm_family *family) { struct crb_tpm_info info; if (CONFIG(HAVE_INTEL_PTT)) { if (!ptt_active()) { printk(BIOS_ERR, "%s: Intel PTT is not active.\n", __func__); return NULL; } printk(BIOS_DEBUG, "%s: Intel PTT is active.\n", __func__); } /* Wake TPM up (if necessary) */ if (crb_tpm_init()) return NULL; /* CRB interface exists only in TPM2 */ if (family != NULL) *family = TPM_2; crb_tpm_get_info(&info); printk(BIOS_INFO, "Initialized TPM device %s revision %d\n", tis_get_dev_name(&info), info.revision); return &crb_tpm_sendrecv; } static void crb_tpm_fill_ssdt(const struct device *dev) { const char *path = acpi_device_path(dev); if (!path) { path = "\\_SB_.TPM"; printk(BIOS_DEBUG, "Using default TPM2 ACPI path: '%s'\n", path); } /* Device */ acpigen_write_device(path); acpigen_write_name_string("_HID", "MSFT0101"); acpigen_write_name_string("_CID", "MSFT0101"); acpi_device_write_uid(dev); acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON); /* Resources */ acpigen_write_name("_CRS"); acpigen_write_resourcetemplate_header(); acpigen_write_mem32fixed(1, TPM_CRB_BASE_ADDRESS, 0x5000); acpigen_write_resourcetemplate_footer(); if (!CONFIG(CHROMEOS) && CONFIG(TPM_PPI)) tpm_ppi_acpi_fill_ssdt(dev); acpigen_pop_len(); /* Device */ } static const char *crb_tpm_acpi_name(const struct device *dev) { return "TPM"; } #if CONFIG(GENERATE_SMBIOS_TABLES) && CONFIG(TPM2) static tpm_result_t tpm_get_cap(uint32_t property, uint32_t *value) { TPMS_CAPABILITY_DATA cap_data; int i; tpm_result_t rc; if (!value) return TPM_CB_INVALID_ARG; rc = tlcl2_get_capability(TPM_CAP_TPM_PROPERTIES, property, 1, &cap_data); if (rc) return rc; for (i = 0 ; i < cap_data.data.tpmProperties.count; i++) { if (cap_data.data.tpmProperties.tpmProperty[i].property == property) { *value = cap_data.data.tpmProperties.tpmProperty[i].value; return TPM_SUCCESS; } } return TPM_CB_FAIL; } static int smbios_write_type43_tpm(struct device *dev, int *handle, unsigned long *current) { struct crb_tpm_info info; uint32_t tpm_manuf, tpm_family; uint32_t fw_ver1, fw_ver2; uint8_t major_spec_ver, minor_spec_ver; if (tlcl_get_family() == TPM_1) return 0; crb_tpm_get_info(&info); /* If any of these have invalid values, assume TPM not present or disabled */ if (info.vendor_id == 0 || info.vendor_id == 0xFFFF || info.device_id == 0 || info.device_id == 0xFFFF) { printk(BIOS_DEBUG, "%s: Invalid Vendor ID/Device ID\n", __func__); return 0; } /* Vendor ID is the value returned by TPM2_GetCapabiltiy TPM_PT_MANUFACTURER */ if (tpm_get_cap(TPM_PT_MANUFACTURER, &tpm_manuf)) { printk(BIOS_DEBUG, "TPM2_GetCap TPM_PT_MANUFACTURER failed\n"); return 0; } tpm_manuf = be32toh(tpm_manuf); if (tpm_get_cap(TPM_PT_FIRMWARE_VERSION_1, &fw_ver1)) { printk(BIOS_DEBUG, "TPM2_GetCap TPM_PT_FIRMWARE_VERSION_1 failed\n"); return 0; } if (tpm_get_cap(TPM_PT_FIRMWARE_VERSION_2, &fw_ver2)) { printk(BIOS_DEBUG, "TPM2_GetCap TPM_PT_FIRMWARE_VERSION_2 failed\n"); return 0; } if (tpm_get_cap(TPM_PT_FAMILY_INDICATOR, &tpm_family)) { printk(BIOS_DEBUG, "TPM2_GetCap TPM_PT_FAMILY_INDICATOR failed\n"); return 0; } tpm_family = be32toh(tpm_family); if (!strncmp((char *)&tpm_family, "2.0", 4)) { major_spec_ver = 2; minor_spec_ver = 0; } else { printk(BIOS_ERR, "%s: Invalid TPM family\n", __func__); return 0; } return smbios_write_type43(current, handle, tpm_manuf, major_spec_ver, minor_spec_ver, fw_ver1, fw_ver2, tis_get_dev_name(&info), SMBIOS_TPM_DEVICE_CHARACTERISTICS_NOT_SUPPORTED, 0); } #endif static struct device_operations __maybe_unused crb_ops = { .read_resources = noop_read_resources, .set_resources = noop_set_resources, #if CONFIG(HAVE_ACPI_TABLES) .acpi_name = crb_tpm_acpi_name, .acpi_fill_ssdt = crb_tpm_fill_ssdt, #endif #if CONFIG(GENERATE_SMBIOS_TABLES) && CONFIG(TPM2) .get_smbios_data = smbios_write_type43_tpm, #endif }; static void enable_dev(struct device *dev) { if (crb_tis_probe(NULL) == NULL) { dev->enabled = 0; return; } #if !DEVTREE_EARLY dev->ops = &crb_ops; #endif } struct chip_operations drivers_crb_ops = { .name = "CRB TPM", .enable_dev = enable_dev };