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mfd: cros_ec: Add SKU ID and Secure storage API 

Add API to store SKU, Cros board information in EC flash memory.
Add API to store security data in EC.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Acked-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Fabien Lahoudere <fabien.lahoudere@collabora.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Gwendal Grignou 2019-06-03 11:33:59 -07:00 committed by Lee Jones
parent a0d50b31ce
commit cc3a032fd7
1 changed files with 107 additions and 0 deletions
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107
include/linux/mfd/cros_ec_commands.h
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@ -1292,6 +1292,17 @@ struct ec_response_get_features {
uint32_t flags[2];
} __ec_align4;
/*****************************************************************************/
/* Get the board's SKU ID from EC */
#define EC_CMD_GET_SKU_ID 0x000E
/* Set SKU ID from AP */
#define EC_CMD_SET_SKU_ID 0x000F
struct ec_sku_id_info {
uint32_t sku_id;
} __ec_align4;
/*****************************************************************************/
/* Flash commands */
@ -2902,6 +2913,49 @@ struct ec_response_port80_last_boot {
uint16_t code;
} __ec_align2;
/*****************************************************************************/
/* Temporary secure storage for host verified boot use */
/* Number of bytes in a vstore slot */
#define EC_VSTORE_SLOT_SIZE 64
/* Maximum number of vstore slots */
#define EC_VSTORE_SLOT_MAX 32
/* Get persistent storage info */
#define EC_CMD_VSTORE_INFO 0x0049
struct ec_response_vstore_info {
/* Indicates which slots are locked */
uint32_t slot_locked;
/* Total number of slots available */
uint8_t slot_count;
} __ec_align_size1;
/*
* Read temporary secure storage
*
* Response is EC_VSTORE_SLOT_SIZE bytes of data.
*/
#define EC_CMD_VSTORE_READ 0x004A
struct ec_params_vstore_read {
uint8_t slot; /* Slot to read from */
} __ec_align1;
struct ec_response_vstore_read {
uint8_t data[EC_VSTORE_SLOT_SIZE];
} __ec_align1;
/*
* Write temporary secure storage and lock it.
*/
#define EC_CMD_VSTORE_WRITE 0x004B
struct ec_params_vstore_write {
uint8_t slot; /* Slot to write to */
uint8_t data[EC_VSTORE_SLOT_SIZE];
} __ec_align1;
/*****************************************************************************/
/* Thermal engine commands. Note that there are two implementations. We'll
* reuse the command number, but the data and behavior is incompatible.
@ -5069,6 +5123,59 @@ struct ec_params_efs_verify {
uint8_t region; /* enum ec_flash_region */
} __ec_align1;
/*
* Retrieve info from Cros Board Info store. Response is based on the data
* type. Integers return a uint32. Strings return a string, using the response
* size to determine how big it is.
*/
#define EC_CMD_GET_CROS_BOARD_INFO 0x011F
/*
* Write info into Cros Board Info on EEPROM. Write fails if the board has
* hardware write-protect enabled.
*/
#define EC_CMD_SET_CROS_BOARD_INFO 0x0120
enum cbi_data_tag {
CBI_TAG_BOARD_VERSION = 0, /* uint32_t or smaller */
CBI_TAG_OEM_ID = 1, /* uint32_t or smaller */
CBI_TAG_SKU_ID = 2, /* uint32_t or smaller */
CBI_TAG_DRAM_PART_NUM = 3, /* variable length ascii, nul terminated. */
CBI_TAG_OEM_NAME = 4, /* variable length ascii, nul terminated. */
CBI_TAG_MODEL_ID = 5, /* uint32_t or smaller */
CBI_TAG_COUNT,
};
/*
* Flags to control read operation
*
* RELOAD: Invalidate cache and read data from EEPROM. Useful to verify
* write was successful without reboot.
*/
#define CBI_GET_RELOAD BIT(0)
struct ec_params_get_cbi {
uint32_t tag; /* enum cbi_data_tag */
uint32_t flag; /* CBI_GET_* */
} __ec_align4;
/*
* Flags to control write behavior.
*
* NO_SYNC: Makes EC update data in RAM but skip writing to EEPROM. It's
* useful when writing multiple fields in a row.
* INIT: Need to be set when creating a new CBI from scratch. All fields
* will be initialized to zero first.
*/
#define CBI_SET_NO_SYNC BIT(0)
#define CBI_SET_INIT BIT(1)
struct ec_params_set_cbi {
uint32_t tag; /* enum cbi_data_tag */
uint32_t flag; /* CBI_SET_* */
uint32_t size; /* Data size */
uint8_t data[]; /* For string and raw data */
} __ec_align1;
/*****************************************************************************/
/* Fingerprint MCU commands: range 0x0400-0x040x */