inherit image_types

IMAGE_BOOTLOADER ?= "u-boot"

# Handle u-boot suffixes
UBOOT_SUFFIX ?= "bin"

#
# Create an image that can by written onto a SD card using dd.
#
# External variables needed:
#   ${SDCARD_ROOTFS}    - the rootfs image to incorporate
#   ${IMAGE_BOOTLOADER} - bootloader to use {u-boot, barebox}x
#
# The disk layout used is:
#
#    0  - 1M                  - reserved to bootloader and other data
#    1M - BOOT_SPACE          - kernel
#    BOOT_SPACE - SDCARD_SIZE - rootfs
#

# Default to 3.4GiB images
SDCARD_SIZE ?= "3400"

# Boot partition volume id
BOOTDD_VOLUME_ID ?= "Boot ${MACHINE}"

# Addional space for boot partition
BOOT_SPACE ?= "5M"

IMAGE_DEPENDS_sdcard = "parted-native dosfstools-native mtools-native \
                        virtual/kernel ${IMAGE_BOOTLOADER}"

IMAGE_CMD_sdcard () {
	if [ -z "${SDCARD_ROOTFS}" ]; then
		bberror "SDCARD_ROOTFS is undefined. To use sdcard image from Freescale's BSP it needs to be defined."
		exit 1
	fi

	TMP=${WORKDIR}/tmp
	SDCARD=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.sdcard

	dd if=/dev/zero of=${SDCARD} bs=$(expr 1000 \* 1000) count=${SDCARD_SIZE}

	# Create partition table
	parted -s ${SDCARD} mklabel msdos
	parted -s ${SDCARD} mkpart primary 0 1M
	parted -s ${SDCARD} mkpart primary 1M ${BOOT_SPACE}
	parted -s ${SDCARD} mkpart primary ${BOOT_SPACE} 100%
	parted ${SDCARD} print

	case "${IMAGE_BOOTLOADER}" in
		u-boot)
		dd if=${DEPLOY_DIR_IMAGE}/u-boot-${MACHINE}.${UBOOT_SUFFIX} of=${SDCARD} conv=notrunc seek=2 bs=512
		;;
		barebox)
		dd if=${DEPLOY_DIR_IMAGE}/barebox-${MACHINE}.bin of=${SDCARD} conv=notrunc seek=1 skip=1 bs=512
		dd if=${DEPLOY_DIR_IMAGE}/bareboxenv-${MACHINE}.bin of=${SDCARD} conv=notrunc seek=1 bs=512k
		;;
		*)
		bberror "Unkown IMAGE_BOOTLOADER value"
		exit 1
		;;
	esac

	BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDCARD} unit b print \
	                  | awk '/ 2 / { print substr($3, 1, length($3 -1)) / 512 }')
	mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS
	mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/uImage-${MACHINE}.bin ::/uImage

	dd if=${WORKDIR}/boot.img of=${SDCARD} conv=notrunc seek=1 bs=1M
	dd if=${SDCARD_ROOTFS} of=${SDCARD} conv=notrunc seek=1 bs=${BOOT_SPACE}
}