drivers/camera: Add config CHROMEOS_CAMERA

Add cros_camera_info struct for camera information, and
check_cros_camera_info() for checking the magic, CRC and version.

BUG=b:144820097
TEST=emerge-kukui coreboot
BRANCH=kukui

Change-Id: I1215fec76643b0cf7e09433e1190e8bd387e6953
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46042
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/camera/cros_camera.h

@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __VENDORCODE_GOOGLE_CHROMEOS_CAMERA_H
+#define __VENDORCODE_GOOGLE_CHROMEOS_CAMERA_H
+
+#include <stdint.h>
+
+#define CROS_CAMERA_INFO_MAGIC "CrOS"
+#define CROS_CAMERA_INFO_VERSION 1
+#define CROS_CAMERA_INFO_SIZE_MIN 0x0a
+
+struct cros_camera_info {
+	uint8_t magic[4];  /* CROS_CAMERA_INFO_MAGIC */
+	uint16_t crc16;
+	uint8_t version;
+	uint8_t size;
+	uint16_t data_format;
+	uint16_t module_pid;
+	uint8_t module_vid[2];
+	uint8_t sensor_vid[2];
+	uint16_t sensor_pid;
+};
+
+/* Returns 0 on success, non-zero on errors. */
+int check_cros_camera_info(const struct cros_camera_info *info);
+
+#endif