meta-sunxi/classes/sdcard_image-sunxi.bbclass

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inherit image_types
#
# Create an image that can by written onto a SD card using dd.
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# Originally written for rasberrypi adapt for the needs of allwinner sunxi based boards
#
# The disk layout used is:
#
# 0 -> 8*1024 - reserverd
# 8*1024 -> 32*1024 -
# 32*1024 -> 2048*1024 -
# 2048*1024 -> BOOT_SPACE - bootloader and kernel
#
#
# This image depends on ext3 image
IMAGE_TYPEDEP_sunxi-sdimg = "ext3"
# Boot partition volume id
BOOTDD_VOLUME_ID ?= "${MACHINE}"
# Boot partition size [in KiB]
BOOT_SPACE ?= "20480"
# First partition begin at sector 2048 : 2048*1024 = 2097152
IMAGE_ROOTFS_ALIGNMENT = "2048"
# Use an uncompressed ext3 by default as rootfs
SDIMG_ROOTFS_TYPE ?= "ext3"
SDIMG_ROOTFS = "${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.${SDIMG_ROOTFS_TYPE}"
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IMAGE_DEPENDS_sunxi-sdimg += " \
parted-native \
mtools-native \
dosfstools-native \
virtual/kernel \
virtual/bootloader \
sunxi-board-fex \
"
rootfs[depends] += "sunxi-board-fex:do_deploy"
# SD card image name
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SDIMG = "${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.sunxi-sdimg"
IMAGEDATESTAMP = "${@time.strftime('%Y.%m.%d',time.gmtime())}"
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IMAGE_CMD_sunxi-sdimg () {
# Align partitions
BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE} + ${IMAGE_ROOTFS_ALIGNMENT} - 1)
BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE_ALIGNED} - ${BOOT_SPACE_ALIGNED} % ${IMAGE_ROOTFS_ALIGNMENT})
SDIMG_SIZE=$(expr ${IMAGE_ROOTFS_ALIGNMENT} + ${BOOT_SPACE_ALIGNED} + $ROOTFS_SIZE + ${IMAGE_ROOTFS_ALIGNMENT})
# Initialize sdcard image file
dd if=/dev/zero of=${SDIMG} bs=1 count=0 seek=$(expr 1024 \* ${SDIMG_SIZE})
# Create partition table
parted -s ${SDIMG} mklabel msdos
# Create boot partition and mark it as bootable
parted -s ${SDIMG} unit KiB mkpart primary fat32 ${IMAGE_ROOTFS_ALIGNMENT} $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT})
parted -s ${SDIMG} set 1 boot on
# Create rootfs partition
parted -s ${SDIMG} unit KiB mkpart primary ext2 $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT} \+ ${ROOTFS_SIZE})
parted ${SDIMG} print
# Create a vfat image with boot files
BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDIMG} unit b print | awk '/ 1 / { print substr($4, 1, length($4 -1)) / 512 /2 }')
mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS
mcopy -i ${WORKDIR}/boot.img -s ${STAGING_DIR_HOST}/usr/src/kernel/${KERNEL_IMAGETYPE} ::uImage
if [ -e "${DEPLOY_DIR_IMAGE}/fex.bin" ]
then
mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/fex.bin ::script.bin
fi
# Add stamp file
echo "${IMAGE_NAME}-${IMAGEDATESTAMP}" > ${WORKDIR}/image-version-info
mcopy -i ${WORKDIR}/boot.img -v ${WORKDIR}//image-version-info ::
# Burn Partitions
dd if=${WORKDIR}/boot.img of=${SDIMG} conv=notrunc seek=1 bs=$(expr ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
# If SDIMG_ROOTFS_TYPE is a .xz file use xzcat
if echo "${SDIMG_ROOTFS_TYPE}" | egrep -q "*\.xz"
then
xzcat ${SDIMG_ROOTFS} | dd of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
else
dd if=${SDIMG_ROOTFS} of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
fi
#write u-boot and spl at the beginint of sdcard in one shot
dd if=${DEPLOY_DIR_IMAGE}/u-boot-sunxi-with-spl.bin of=${SDIMG} bs=1024 seek=8 conv=notrunc
}