greybus: Add camera protocol definition

Define the camera data protocol ID and all the protocol operations data
structures.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/greybus_manifest.h

@@ -35,7 +35,7 @@ enum greybus_protocol {
 	/* 0x0a is unused */
 	GREYBUS_PROTOCOL_SPI		= 0x0b,
 	GREYBUS_PROTOCOL_DISPLAY	= 0x0c,
-	GREYBUS_PROTOCOL_CAMERA		= 0x0d,
+	GREYBUS_PROTOCOL_CAMERA_MGMT	= 0x0d,
 	GREYBUS_PROTOCOL_SENSOR		= 0x0e,
 	GREYBUS_PROTOCOL_LIGHTS		= 0x0f,
 	GREYBUS_PROTOCOL_VIBRATOR	= 0x10,
@@ -44,6 +44,7 @@ enum greybus_protocol {
 	GREYBUS_PROTOCOL_AUDIO_DATA	= 0x13,
 	GREYBUS_PROTOCOL_SVC            = 0x14,
 	GREYBUS_PROTOCOL_FIRMWARE	= 0x15,
+	GREYBUS_PROTOCOL_CAMERA_DATA	= 0x16,
 		/* ... */
 	GREYBUS_PROTOCOL_RAW		= 0xfe,
 	GREYBUS_PROTOCOL_VENDOR		= 0xff,

drivers/staging/greybus/greybus_protocols.h

@@ -1100,6 +1100,77 @@ struct gb_sdio_event_request {
 #define GB_SDIO_WP		0x04
 } __packed;
 
+/* Camera */
+
+#define GB_CAMERA_VERSION_MAJOR			0x00
+#define GB_CAMERA_VERSION_MINOR			0x01
+
+/* Greybus Camera request types */
+#define GB_CAMERA_TYPE_CAPABILITIES		0x02
+#define GB_CAMERA_TYPE_CONFIGURE_STREAMS	0x03
+#define GB_CAMERA_TYPE_CAPTURE			0x04
+#define GB_CAMERA_TYPE_FLUSH			0x05
+#define GB_CAMERA_TYPE_METADATA			0x06
+
+#define GB_CAMERA_MAX_STREAMS			4
+#define GB_CAMERA_MAX_SETTINGS_SIZE		8192
+
+/* Greybus Camera Configure Streams request payload */
+struct gb_camera_stream_config_request {
+	__le16 width;
+	__le16 height;
+	__le16 format;
+	__le16 padding;
+} __packed;
+
+struct gb_camera_configure_streams_request {
+	__le16 num_streams;
+	__le16 padding;
+	struct gb_camera_stream_config_request config[0];
+} __packed;
+
+/* Greybus Camera Configure Streams response payload */
+struct gb_camera_stream_config_response {
+	__le16 width;
+	__le16 height;
+	__le16 format;
+	__u8 virtual_channel;
+	__u8 data_type[2];
+	__u8 padding[3];
+	__le32 max_size;
+} __packed;
+
+struct gb_camera_configure_streams_response {
+	__le16 num_streams;
+#define GB_CAMERA_CONFIGURE_STREAMS_ADJUSTED	0x01
+	u8 flags;
+	u8 padding;
+	struct gb_camera_stream_config_response config[0];
+} __packed;
+
+/* Greybus Camera Capture request payload - response has no payload */
+struct gb_camera_capture_request {
+	__le32 request_id;
+	u8 streams;
+	u8 padding;
+	__le16 num_frames;
+	u8 settings[0];
+} __packed;
+
+/* Greybus Camera Flush response payload - request has no payload */
+struct gb_camera_flush_response {
+	__le32 request_id;
+} __packed;
+
+/* Greybus Camera Metadata request payload - operation has no response */
+struct gb_camera_metadata_request {
+	__le32 request_id;
+	__le16 frame_number;
+	__u8 stream;
+	__u8 padding;
+	u8 metadata[0];
+} __packed;
+
 /* Lights */
 
 #define GB_LIGHTS_VERSION_MAJOR 0x00