src/drivers/crb/tpm.h

   1 /* SPDX-License-Identifier: BSD-3-Clause */
   2 /* This is a driver for a Command Response Buffer Interface */
   3
   4 /* CRB driver */
   5 /* address of locality 0 (CRB) */
   6 #define TPM_CRB_BASE_ADDRESS        CONFIG_CRB_TPM_BASE_ADDRESS
   7
   8 #define CRB_REG(LOCTY, REG)                                 \
   9         (void *)(uintptr_t)(CONFIG_CRB_TPM_BASE_ADDRESS + (LOCTY << 12) + REG)
  10
  11 /* hardware registers */
  12 #define CRB_REG_LOC_STATE               0x00
  13 #define CRB_REG_LOC_CTRL                0x08
  14 #define CRB_REG_LOC_STS                 0x0C
  15
  16 /* LOC_CTRL BIT MASKS */
  17 #define LOC_CTRL_REQ_ACCESS             0x01
  18
  19 /* LOC STATE BIT MASKS */
  20 #define LOC_STATE_LOC_ASSIGN    0x02
  21 #define LOC_STATE_REG_VALID_STS 0x80
  22
  23 /* LOC STS BIT MASKS */
  24 #define LOC_STS_GRANTED                 0x01
  25
  26 #define CRB_REG_INTF_ID                 0x30
  27 #define CRB_REG_REQUEST                 0x40
  28 #define CRB_REG_STATUS                  0x44
  29 #define CRB_REG_CANCEL                  0x48
  30 #define CRB_REG_START                   0x4C
  31 #define CRB_REG_INT_CTRL                0x50
  32 #define CRB_REG_CMD_SIZE                0x58
  33 #define CRB_REG_CMD_ADDR                0x5C
  34 #define CRB_REG_RESP_SIZE               0x64
  35 #define CRB_REG_RESP_ADDR               0x68
  36 #define CRB_REG_DATA_BUFF               0x80
  37
  38 /* CRB INTF BIT MASK */
  39 #define CRB_INTF_REG_CAP_CRB    (1<<14)
  40 #define CRB_INTF_REG_INTF_SEL   (1<<17)
  41 #define CRB_INTF_REG_INTF_LOCK  (1<<19)
  42
  43 /*REQUEST Register related */
  44 #define CRB_REG_REQUEST_CMD_RDY         0x01
  45 #define CRB_REG_REQUEST_GO_IDLE         0x02
  46
  47 /* STATUS Register related */
  48 #define CRB_REG_STATUS_ERROR            0x01
  49 #define CRB_REG_STATUS_IDLE                     0x02
  50
  51 /* START Register related */
  52 #define CRB_REG_START_START                     0x01
  53
  54 /* TPM Info Struct */
  55 struct tpm2_info {
  56         uint16_t vendor_id;
  57         uint16_t device_id;
  58         uint16_t revision;
  59 };
  60
  61 int tpm2_init(void);
  62 void tpm2_get_info(struct tpm2_info *tpm2_info);
  63 size_t tpm2_process_command(const void *tpm2_command, size_t command_size,
  64                             void *tpm2_response, size_t max_response);