From 72ddd7ad2563b3a2e99311d1969832c858733543 Mon Sep 17 00:00:00 2001
From: Anton Gerasimov <anton@advancedtelematic.com>
Date: Wed, 28 Dec 2016 17:38:59 +0100
Subject: Add OTA SD image for Minnowboard

---
 classes/sdcard_image-minnowboard-ota.bbclass | 78 ++++++++++++++++++++++++++++
 classes/sdcard_image-porter-ota.bbclass      |  3 ++
 classes/sdcard_image-rpi-ota.bbclass         |  3 ++
 conf/distro/sota.conf.inc                    |  2 +
 4 files changed, 86 insertions(+)
 create mode 100644 classes/sdcard_image-minnowboard-ota.bbclass

diff --git a/classes/sdcard_image-minnowboard-ota.bbclass b/classes/sdcard_image-minnowboard-ota.bbclass
new file mode 100644
index 0000000..c49b3cd
--- /dev/null
+++ b/classes/sdcard_image-minnowboard-ota.bbclass
@@ -0,0 +1,78 @@
+inherit image_types
+
+# Boot partition volume id
+BOOTDD_VOLUME_ID ?= "${MACHINE}"
+
+# Boot partition size [in KiB] (will be rounded up to IMAGE_ROOTFS_ALIGNMENT)
+BOOT_SPACE ?= "4096"
+
+IMAGE_ROOTFS_ALIGNMENT = "4096"
+SDIMG_OTA_ROOTFS_TYPE ?= "otaimg"
+SDIMG_OTA_ROOTFS = "${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.${SDIMG_OTA_ROOTFS_TYPE}"
+
+IMAGE_TYPEDEP_minnowboard-sdimg-ota = "${SDIMG_OTA_ROOTFS_TYPE}"
+IMAGE_DEPENDS_minnowboard-sdimg-ota = " \
+			parted-native \
+			mtools-native \
+			dosfstools-native \
+			minnowboard-bootfiles \
+			"
+
+SDIMG_OTA = "${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.minnowboard-sdimg-ota"
+
+IMAGE_CMD_minnowboard-sdimg-ota () {
+	OTAROOT_SIZE=`du -Lb ${SDIMG_OTA_ROOTFS} | cut -f1`
+	OTAROOT_SIZE=$(expr ${OTAROOT_SIZE} / 1024 + 1)
+	BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE} + ${IMAGE_ROOTFS_ALIGNMENT} - 1)
+	BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE_ALIGNED} - ${BOOT_SPACE_ALIGNED} % ${IMAGE_ROOTFS_ALIGNMENT})
+	SDIMG_OTA_SIZE=$(expr ${IMAGE_ROOTFS_ALIGNMENT} + ${BOOT_SPACE_ALIGNED} + $OTAROOT_SIZE)
+
+	echo "Creating filesystem with Boot partition ${BOOT_SPACE_ALIGNED} KiB and RootFS $OTAROOT_SIZE KiB"
+
+	# Initialize sdcard image file
+	dd if=/dev/zero of=${SDIMG_OTA} bs=1024 count=0 seek=${SDIMG_OTA_SIZE}
+
+	# Create partition table
+	parted -s ${SDIMG_OTA} mklabel msdos
+	# Create boot partition and mark it as bootable
+	parted -s ${SDIMG_OTA} unit KiB mkpart primary fat32 ${IMAGE_ROOTFS_ALIGNMENT} $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT})
+	parted -s ${SDIMG_OTA} set 1 boot on
+	# Create rootfs partition to the end of disk
+	parted -s ${SDIMG_OTA} -- unit KiB mkpart primary ext2 $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) -1s
+	parted ${SDIMG_OTA} print
+
+	# Create a vfat image with boot files
+	BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDIMG_OTA} unit b print | awk '/ 1 / { print substr($4, 1, length($4 -1)) / 512 /2 }')
+	rm -f ${WORKDIR}/boot.img
+	mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS
+	sync
+
+	mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/minnowboard-bootfiles/* ::/
+
+	sync
+	dd if=${WORKDIR}/boot.img of=${SDIMG_OTA} conv=notrunc seek=1 bs=$(expr ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
+
+	if echo "${SDIMG_OTA_ROOTFS_TYPE}" | egrep -q "*\.xz"
+	then
+		xzcat ${SDIMG_OTA_ROOTFS} | dd of=${SDIMG_OTA} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
+	else
+		dd if=${SDIMG_OTA_ROOTFS} of=${SDIMG_OTA} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
+	fi
+
+	# Optionally apply compression
+	case "${SDIMG_OTA_COMPRESSION}" in
+	"gzip")
+		gzip -k9 "${SDIMG_OTA}"
+		;;
+	"bzip2")
+		bzip2 -k9 "${SDIMG_OTA}"
+		;;
+	"xz")
+		xz -k "${SDIMG_OTA}"
+		;;
+	esac
+
+	rm -f ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.minnowboard-sdimg-ota
+	ln -s ${IMAGE_NAME}.minnowboard-sdimg-ota ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.minnowboard-sdimg-ota
+}
+
diff --git a/classes/sdcard_image-porter-ota.bbclass b/classes/sdcard_image-porter-ota.bbclass
index 1b1de79..5909b44 100644
--- a/classes/sdcard_image-porter-ota.bbclass
+++ b/classes/sdcard_image-porter-ota.bbclass
@@ -59,6 +59,9 @@ IMAGE_CMD_porter-sdimg-ota () {
 		dd if=${SDIMG_OTA_ROOTFS} of=${SDIMG_OTA} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
 	fi
 
+	rm -f ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.porter-sdimg-ota
+	ln -s ${IMAGE_NAME}.porter-sdimg-ota ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.porter-sdimg-ota
+
 	# Optionally apply compression
 	case "${SDIMG_OTA_COMPRESSION}" in
 	"gzip")
diff --git a/classes/sdcard_image-rpi-ota.bbclass b/classes/sdcard_image-rpi-ota.bbclass
index 2fa03c4..8fc2605 100644
--- a/classes/sdcard_image-rpi-ota.bbclass
+++ b/classes/sdcard_image-rpi-ota.bbclass
@@ -162,6 +162,9 @@ IMAGE_CMD_rpi-sdimg-ota () {
 		dd if=${SDIMG_OTA_ROOTFS} of=${SDIMG_OTA} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync
 	fi
 
+	rm -f ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.rpi-sdimg-ota
+	ln -s ${IMAGE_NAME}.rpi-sdimg-ota ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.rpi-sdimg-ota
+
 	# Optionally apply compression
 	case "${SDIMG_OTA_COMPRESSION}" in
 	"gzip")
diff --git a/conf/distro/sota.conf.inc b/conf/distro/sota.conf.inc
index d9b88c7..23e5a43 100644
--- a/conf/distro/sota.conf.inc
+++ b/conf/distro/sota.conf.inc
@@ -32,6 +32,8 @@ DISTRO_TYPE ?= "${@bb.utils.contains("IMAGE_FEATURES", "debug-tweaks", "debug",
 ## Minnowboard
 PREFERRED_PROVIDER_virtual/bootloader_intel-corei7-64 = "u-boot-ota"
 UBOOT_MACHINE_intel-corei7-64 = "minnowmax_defconfig"
+IMAGE_CLASSES_append_intel-corei7-64 = " sdcard_image-minnowboard-ota"
+IMAGE_FSTYPES += "${@'minnowboard-sdimg-ota' if d.getVar('MACHINE', True).startswith('intel-corei7-64') else ''}"
 
 ## QEMU
 PREFERRED_PROVIDER_virtual/bootloader_qemux86 = "u-boot-ota"
-- 
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