/* SPDX-License-Identifier: BSD-3-Clause */ /* This is a driver for a Command Response Buffer Interface */ #include <security/tpm/tis.h> #include <security/tpm/tss_errors.h> /* CRB driver */ /* address of locality 0 (CRB) */ #define TPM_CRB_BASE_ADDRESS CONFIG_CRB_TPM_BASE_ADDRESS #define CRB_REG(LOCTY, REG) \ (void *)(uintptr_t)(CONFIG_CRB_TPM_BASE_ADDRESS + (LOCTY << 12) + REG) /* hardware registers */ #define CRB_REG_LOC_STATE 0x00 #define CRB_REG_LOC_CTRL 0x08 #define CRB_REG_LOC_STS 0x0C /* LOC_CTRL BIT MASKS */ #define LOC_CTRL_REQ_ACCESS 0x01 /* LOC STATE BIT MASKS */ #define LOC_STATE_LOC_ASSIGN 0x02 #define LOC_STATE_REG_VALID_STS 0x80 /* LOC STS BIT MASKS */ #define LOC_STS_GRANTED 0x01 #define CRB_REG_INTF_ID 0x30 #define CRB_REG_REQUEST 0x40 #define CRB_REG_STATUS 0x44 #define CRB_REG_CANCEL 0x48 #define CRB_REG_START 0x4C #define CRB_REG_INT_CTRL 0x50 #define CRB_REG_CMD_SIZE 0x58 #define CRB_REG_CMD_ADDR 0x5C #define CRB_REG_RESP_SIZE 0x64 #define CRB_REG_RESP_ADDR 0x68 #define CRB_REG_DATA_BUFF 0x80 /* CRB INTF BIT MASK */ #define CRB_INTF_REG_CAP_CRB (1<<14) #define CRB_INTF_REG_INTF_SEL (1<<17) #define CRB_INTF_REG_INTF_LOCK (1<<19) /*REQUEST Register related */ #define CRB_REG_REQUEST_CMD_RDY 0x01 #define CRB_REG_REQUEST_GO_IDLE 0x02 /* STATUS Register related */ #define CRB_REG_STATUS_ERROR 0x01 #define CRB_REG_STATUS_IDLE 0x02 /* START Register related */ #define CRB_REG_START_START 0x01 /* CRB TPM Info Struct */ struct crb_tpm_info { uint16_t vendor_id; uint16_t device_id; uint16_t revision; }; tpm_result_t crb_tpm_init(void); void crb_tpm_get_info(struct crb_tpm_info *crb_tpm_info); size_t crb_tpm_process_command(const void *tpm2_command, size_t command_size, void *tpm2_response, size_t max_response); bool crb_tpm_is_active(void); tis_sendrecv_fn crb_tis_probe(enum tpm_family *family);