include/linux/platform_data/wilco-ec.h

Source file repositories/reference/linux-study-clean/include/linux/platform_data/wilco-ec.h

File Facts

System
Linux kernel
Corpus path
include/linux/platform_data/wilco-ec.h
Extension
.h
Size
7076 bytes
Lines
226
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct wilco_ec_device {
	struct device *dev;
	struct mutex mailbox_lock;
	struct resource *io_command;
	struct resource *io_data;
	struct resource *io_packet;
	void *data_buffer;
	size_t data_size;
	struct platform_device *debugfs_pdev;
	struct platform_device *rtc_pdev;
	struct platform_device *charger_pdev;
	struct platform_device *telem_pdev;
};

/**
 * struct wilco_ec_request - Mailbox request message format.
 * @struct_version: Should be %EC_MAILBOX_PROTO_VERSION
 * @checksum: Sum of all bytes must be 0.
 * @mailbox_id: Mailbox identifier, specifies the command set.
 * @mailbox_version: Mailbox interface version %EC_MAILBOX_VERSION
 * @reserved: Set to zero.
 * @data_size: Length of following data.
 */
struct wilco_ec_request {
	u8 struct_version;
	u8 checksum;
	u16 mailbox_id;
	u8 mailbox_version;
	u8 reserved;
	u16 data_size;
} __packed;

/**
 * struct wilco_ec_response - Mailbox response message format.
 * @struct_version: Should be %EC_MAILBOX_PROTO_VERSION
 * @checksum: Sum of all bytes must be 0.
 * @result: Result code from the EC.  Non-zero indicates an error.
 * @data_size: Length of the response data buffer.
 * @reserved: Set to zero.
 * @data: Response data buffer.  Max size is %EC_MAILBOX_DATA_SIZE_EXTENDED.
 */
struct wilco_ec_response {
	u8 struct_version;
	u8 checksum;
	u16 result;
	u16 data_size;
	u8 reserved[2];
	u8 data[];
} __packed;

/**
 * enum wilco_ec_msg_type - Message type to select a set of command codes.
 * @WILCO_EC_MSG_LEGACY: Legacy EC messages for standard EC behavior.
 * @WILCO_EC_MSG_PROPERTY: Get/Set/Sync EC controlled NVRAM property.
 * @WILCO_EC_MSG_TELEMETRY: Request telemetry data from the EC.
 */
enum wilco_ec_msg_type {
	WILCO_EC_MSG_LEGACY = 0x00f0,
	WILCO_EC_MSG_PROPERTY = 0x00f2,
	WILCO_EC_MSG_TELEMETRY = 0x00f5,
};

/**
 * struct wilco_ec_message - Request and response message.
 * @type: Mailbox message type.
 * @flags: Message flags, e.g. %WILCO_EC_FLAG_NO_RESPONSE.
 * @request_size: Number of bytes to send to the EC.
 * @request_data: Buffer containing the request data.
 * @response_size: Number of bytes to read from EC.
 * @response_data: Buffer containing the response data, should be
 *                 response_size bytes and allocated by caller.
 */
struct wilco_ec_message {
	enum wilco_ec_msg_type type;
	u8 flags;
	size_t request_size;
	void *request_data;
	size_t response_size;
	void *response_data;
};

/**
 * wilco_ec_mailbox() - Send request to the EC and receive the response.
 * @ec: Wilco EC device.
 * @msg: Wilco EC message.
 *
 * Return: Number of bytes received or negative error code on failure.
 */
int wilco_ec_mailbox(struct wilco_ec_device *ec, struct wilco_ec_message *msg);

Annotation

Implementation Notes