diff --git a/include/image-commands.mk b/include/image-commands.mk
index e0738818f..6b4bc4945 100644
--- a/include/image-commands.mk
+++ b/include/image-commands.mk
@@ -4,7 +4,7 @@ IMAGE_KERNEL = $(word 1,$^)
 IMAGE_ROOTFS = $(word 2,$^)
 
 define ModelNameLimit16
-$(shell expr substr "$(word 2, $(subst _, ,$(1)))" 1 16)
+$(shell printf %.16s "$(word 2, $(subst _, ,$(1)))")
 endef
 
 define rootfs_align
@@ -27,8 +27,21 @@ define Build/append-kernel
 	dd if=$(IMAGE_KERNEL) >> $@
 endef
 
+define Build/package-kernel-ubifs
+	mkdir $@.kernelubifs
+	cp $@ $@.kernelubifs/kernel
+	$(STAGING_DIR_HOST)/bin/mkfs.ubifs \
+		$(KERNEL_UBIFS_OPTS) \
+		-r $@.kernelubifs $@
+	rm -r $@.kernelubifs
+endef
+
 define Build/append-image
-	dd if=$(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1) >> $@
+	cp "$(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1)" "$@.stripmeta"
+	fwtool -s /dev/null -t "$@.stripmeta" || :
+	fwtool -i /dev/null -t "$@.stripmeta" || :
+	dd if="$@.stripmeta" >> "$@"
+	rm "$@.stripmeta"
 endef
 
 ifdef IB
@@ -37,8 +50,12 @@ define Build/append-image-stage
 endef
 else
 define Build/append-image-stage
-	dd if=$(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1) of=$(STAGING_DIR_IMAGE)/$(BOARD)$(if $(SUBTARGET),-$(SUBTARGET))-$(DEVICE_NAME)-$(1)
-	dd if=$(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1) >> $@
+	cp "$(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1)" "$@.stripmeta"
+	fwtool -s /dev/null -t "$@.stripmeta" || :
+	fwtool -i /dev/null -t "$@.stripmeta" || :
+	dd if="$@.stripmeta" of="$(STAGING_DIR_IMAGE)/$(BOARD)$(if $(SUBTARGET),-$(SUBTARGET))-$(DEVICE_NAME)-$(1)"
+	dd if="$@.stripmeta" >> "$@"
+	rm "$@.stripmeta"
 endef
 endif
 
@@ -72,6 +89,7 @@ metadata_json = \
 
 define Build/append-metadata
 	$(if $(SUPPORTED_DEVICES),-echo $(call metadata_json) | fwtool -I - $@)
+	sha256sum "$@" | cut -d" " -f1 > "$@.sha256sum"
 	[ ! -s "$(BUILD_KEY)" -o ! -s "$(BUILD_KEY).ucert" -o ! -s "$@" ] || { \
 		cp "$(BUILD_KEY).ucert" "$@.ucert" ;\
 		usign -S -m "$@" -s "$(BUILD_KEY)" -x "$@.sig" ;\
@@ -94,6 +112,15 @@ define Build/append-squashfs-fakeroot-be
 	cat $@.fakesquashfs >> $@
 endef
 
+define Build/append-squashfs4-fakeroot
+	rm -rf $@.fakefs $@.fakesquashfs
+	mkdir $@.fakefs
+	$(STAGING_DIR_HOST)/bin/mksquashfs4 \
+		$@.fakefs $@.fakesquashfs \
+		-nopad -noappend -root-owned
+	cat $@.fakesquashfs >> $@
+endef
+
 define Build/append-string
 	echo -n $(1) >> $@
 endef
@@ -103,7 +130,7 @@ define Build/append-ubi
 		$(if $(UBOOTENV_IN_UBI),--uboot-env) \
 		$(if $(KERNEL_IN_UBI),--kernel $(IMAGE_KERNEL)) \
 		$(foreach part,$(UBINIZE_PARTS),--part $(part)) \
-		$(IMAGE_ROOTFS) \
+		--rootfs $(IMAGE_ROOTFS) \
 		$@.tmp \
 		-p $(BLOCKSIZE:%k=%KiB) -m $(PAGESIZE) \
 		$(if $(SUBPAGESIZE),-s $(SUBPAGESIZE)) \
@@ -113,6 +140,18 @@ define Build/append-ubi
 	rm $@.tmp
 endef
 
+define Build/ubinize-kernel
+	cp $@ $@.tmp
+	sh $(TOPDIR)/scripts/ubinize-image.sh \
+		--kernel $@.tmp \
+		$@ \
+		-p $(BLOCKSIZE:%k=%KiB) -m $(PAGESIZE) \
+		$(if $(SUBPAGESIZE),-s $(SUBPAGESIZE)) \
+		$(if $(VID_HDR_OFFSET),-O $(VID_HDR_OFFSET)) \
+		$(UBINIZE_OPTS)
+	rm $@.tmp
+endef
+
 define Build/append-uboot
 	dd if=$(UBOOT_PATH) >> $@
 endef
@@ -170,11 +209,15 @@ define Build/check-size
 	@imagesize="$$(stat -c%s $@)"; \
 	limitsize="$$(($(subst k,* 1024,$(subst m, * 1024k,$(if $(1),$(1),$(IMAGE_SIZE))))))"; \
 	[ $$limitsize -ge $$imagesize ] || { \
-		echo "WARNING: Image file $@ is too big: $$imagesize > $$limitsize" >&2; \
+		$(call ERROR_MESSAGE,    WARNING: Image file $@ is too big: $$imagesize > $$limitsize); \
 		rm -f $@; \
 	}
 endef
 
+define Build/copy-file
+	cat "$(1)" > "$@"
+endef
+
 define Build/elecom-product-header
 	$(eval product=$(word 1,$(1)))
 	$(eval fw=$(if $(word 2,$(1)),$(word 2,$(1)),$@))
@@ -187,6 +230,19 @@ define Build/elecom-product-header
 	mv $(fw).new $(fw)
 endef
 
+define Build/elecom-wrc-gs-factory
+	$(eval product=$(word 1,$(1)))
+	$(eval version=$(word 2,$(1)))
+	$(eval hash_opt=$(word 3,$(1)))
+	$(MKHASH) md5 $(hash_opt) $@ >> $@
+	( \
+		echo -n "ELECOM $(product) v$(version)" | \
+			dd bs=32 count=1 conv=sync; \
+		dd if=$@; \
+	) > $@.new
+	mv $@.new $@
+endef
+
 define Build/elx-header
 	$(eval hw_id=$(word 1,$(1)))
 	$(eval xor_pattern=$(word 2,$(1)))
@@ -223,15 +279,18 @@ endef
 define Build/fit
 	$(TOPDIR)/scripts/mkits.sh \
 		-D $(DEVICE_NAME) -o $@.its -k $@ \
-		-C $(word 1,$(1)) $(if $(word 2,$(1)),\
-		$(if $(DEVICE_DTS_OVERLAY),-d $(KERNEL_BUILD_DIR)/image-$$(basename $(word 2,$(1))),\
-			-d $(word 2,$(1)))) \
+		-C $(word 1,$(1)) \
+		$(if $(word 2,$(1)),\
+			$(if $(findstring 11,$(if $(DEVICE_DTS_OVERLAY),1)$(if $(findstring $(KERNEL_BUILD_DIR)/image-,$(word 2,$(1))),,1)), \
+				-d $(KERNEL_BUILD_DIR)/image-$$(basename $(word 2,$(1))), \
+				-d $(word 2,$(1)))) \
 		$(if $(findstring with-rootfs,$(word 3,$(1))),-r $(IMAGE_ROOTFS)) \
 		$(if $(findstring with-initrd,$(word 3,$(1))), \
 			$(if $(CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE), \
 				-i $(KERNEL_BUILD_DIR)/initrd.cpio$(strip $(call Build/initrd_compression)))) \
 		-a $(KERNEL_LOADADDR) -e $(if $(KERNEL_ENTRY),$(KERNEL_ENTRY),$(KERNEL_LOADADDR)) \
 		$(if $(DEVICE_FDT_NUM),-n $(DEVICE_FDT_NUM)) \
+		$(if $(DEVICE_DTS_DELIMITER),-l $(DEVICE_DTS_DELIMITER)) \
 		$(if $(DEVICE_DTS_OVERLAY),$(foreach dtso,$(DEVICE_DTS_OVERLAY), -O $(dtso):$(KERNEL_BUILD_DIR)/image-$(dtso).dtb)) \
 		-c $(if $(DEVICE_DTS_CONFIG),$(DEVICE_DTS_CONFIG),"config-1") \
 		-A $(LINUX_KARCH) -v $(LINUX_VERSION)
@@ -256,6 +315,16 @@ define Build/install-dtb
 	)
 endef
 
+define Build/iptime-crc32
+	$(STAGING_DIR_HOST)/bin/iptime-crc32 $(1) $@ $@.new
+	mv $@.new $@
+endef
+
+define Build/iptime-naspkg
+	$(STAGING_DIR_HOST)/bin/iptime-naspkg $(1) $@ $@.new
+	mv $@.new $@
+endef
+
 define Build/jffs2
 	rm -rf $(KDIR_TMP)/$(DEVICE_NAME)/jffs2 && \
 		mkdir -p $(KDIR_TMP)/$(DEVICE_NAME)/jffs2/$$(dirname $(1)) && \
@@ -318,6 +387,19 @@ define Build/netgear-dni
 	mv $@.new $@
 endef
 
+define Build/netgear-encrypted-factory
+	$(TOPDIR)/scripts/netgear-encrypted-factory.py \
+		--input-file $@ \
+		--output-file $@ \
+		--model $(NETGEAR_ENC_MODEL) \
+		--region $(NETGEAR_ENC_REGION) \
+		--version V1.0.0.0.$(VERSION_DIST).$(firstword $(subst -, ,$(REVISION))) \
+		--encryption-block-size 0x20000 \
+		--openssl-bin "$(STAGING_DIR_HOST)/bin/openssl" \
+		--key 6865392d342b4d212964363d6d7e7765312c7132613364316e26322a5a5e2538 \
+		--iv 4a253169516c38243d6c6d2d3b384145
+endef
+
 define Build/openmesh-image
 	$(TOPDIR)/scripts/om-fwupgradecfg-gen.sh \
 		"$(call param_get_default,ce_type,$(1),$(DEVICE_NAME))" \
@@ -370,13 +452,6 @@ define Build/qemu-image
 	fi
 endef
 
-define Build/qsdk-ipq-factory-mmc
-	$(TOPDIR)/scripts/mkits-qsdk-ipq-image.sh \
-		$@.its kernel $(IMAGE_KERNEL) rootfs $(IMAGE_ROOTFS)
-	PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage -f $@.its $@.new
-	@mv $@.new $@
-endef
-
 define Build/qsdk-ipq-factory-nand
 	$(TOPDIR)/scripts/mkits-qsdk-ipq-image.sh \
 		$@.its ubi $@
@@ -496,12 +571,12 @@ define Build/xor-image
 endef
 
 define Build/zip
+	rm -rf $@.tmp
 	mkdir $@.tmp
-	mv $@ $@.tmp/$(1)
-
-	zip -j -X \
-		$(if $(SOURCE_DATE_EPOCH),--mtime="$(SOURCE_DATE_EPOCH)") \
-		$@ $@.tmp/$(if $(1),$(1),$@)
+	mv $@ $@.tmp/$(word 1,$(1))
+	TZ=UTC $(STAGING_DIR_HOST)/bin/zip -j -X \
+		$(wordlist 2,$(words $(1)),$(1)) \
+		$@ $@.tmp/$(if $(word 1,$(1)),$(word 1,$(1)),$$(basename $@))
 	rm -rf $@.tmp
 endef
 
diff --git a/include/image.mk b/include/image.mk
index e06b44893..b3dfc9019 100644
--- a/include/image.mk
+++ b/include/image.mk
@@ -137,14 +137,6 @@ define Image/BuildKernel/MkuImage
 		-n '$(call toupper,$(ARCH)) $(VERSION_DIST) Linux-$(LINUX_VERSION)' -d $(4) $(5)
 endef
 
-define Image/BuildKernel/MkFIT
-	$(TOPDIR)/scripts/mkits.sh \
-		-D $(1) -o $(KDIR)/fit-$(1).its -k $(2) $(if $(3),-d $(3)) -C $(4) -a $(5) -e $(6) \
-		-c $(if $(DEVICE_DTS_CONFIG),$(DEVICE_DTS_CONFIG),"config-1") \
-		-A $(LINUX_KARCH) -v $(LINUX_VERSION)
-	PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage -f $(KDIR)/fit-$(1).its $(KDIR)/fit-$(1)$(7).itb
-endef
-
 ifdef CONFIG_TARGET_IMAGES_GZIP
   define Image/Gzip
 	rm -f $(1).gz
@@ -230,8 +222,7 @@ $(eval $(foreach S,$(NAND_BLOCKSIZE),$(call Image/mkfs/jffs2-nand/template,$(S))
 define Image/mkfs/squashfs-common
 	$(STAGING_DIR_HOST)/bin/mksquashfs4 $(call mkfs_target_dir,$(1)) $@ \
 		-nopad -noappend -root-owned \
-		-comp $(SQUASHFSCOMP) $(SQUASHFSOPT) \
-		-processors $(shell nproc)
+		-comp $(SQUASHFSCOMP) $(SQUASHFSOPT)
 endef
 
 ifeq ($(CONFIG_TARGET_ROOTFS_SECURITY_LABELS),y)
@@ -395,6 +386,7 @@ define Device/Init
 
   DEVICE_DTS :=
   DEVICE_DTS_CONFIG :=
+  DEVICE_DTS_DELIMITER :=
   DEVICE_DTS_DIR :=
   DEVICE_DTS_OVERLAY :=
   DEVICE_FDT_NUM :=
@@ -420,8 +412,8 @@ DEFAULT_DEVICE_VARS := \
   DEVICE_NAME KERNEL KERNEL_INITRAMFS KERNEL_INITRAMFS_IMAGE KERNEL_SIZE \
   CMDLINE UBOOTENV_IN_UBI KERNEL_IN_UBI BLOCKSIZE PAGESIZE SUBPAGESIZE \
   VID_HDR_OFFSET UBINIZE_OPTS UBINIZE_PARTS MKUBIFS_OPTS DEVICE_DTS \
-  DEVICE_DTS_CONFIG DEVICE_DTS_DIR DEVICE_DTS_OVERLAY DEVICE_FDT_NUM \
-  DEVICE_IMG_PREFIX SOC BOARD_NAME UIMAGE_MAGIC UIMAGE_NAME \
+  DEVICE_DTS_CONFIG DEVICE_DTS_DELIMITER DEVICE_DTS_DIR DEVICE_DTS_OVERLAY \
+  DEVICE_FDT_NUM DEVICE_IMG_PREFIX SOC BOARD_NAME UIMAGE_MAGIC UIMAGE_NAME \
   SUPPORTED_DEVICES IMAGE_METADATA KERNEL_ENTRY KERNEL_LOADADDR \
   UBOOT_PATH IMAGE_SIZE \
   DEVICE_PACKAGES DEVICE_COMPAT_VERSION DEVICE_COMPAT_MESSAGE \
@@ -493,11 +485,11 @@ define Device/Build/initramfs
   $(BUILD_DIR)/json_info_files/$$(KERNEL_INITRAMFS_IMAGE).json: $(BIN_DIR)/$$(KERNEL_INITRAMFS_IMAGE)
 	@mkdir -p $$(shell dirname $$@)
 	DEVICE_ID="$(1)" \
-	BIN_DIR="$(BIN_DIR)" \
 	SOURCE_DATE_EPOCH=$(SOURCE_DATE_EPOCH) \
-	DEVICE_IMG_NAME="$$(notdir $$^)" \
-	IMAGE_TYPE="kernel" \
-	IMAGE_FILESYSTEM="initramfs" \
+	FILE_NAME="$$(notdir $$^)" \
+	FILE_DIR="$(KDIR)/tmp" \
+	FILE_TYPE="kernel" \
+	FILE_FILESYSTEM="initramfs" \
 	DEVICE_IMG_PREFIX="$$(DEVICE_IMG_PREFIX)" \
 	DEVICE_VENDOR="$$(DEVICE_VENDOR)" \
 	DEVICE_MODEL="$$(DEVICE_MODEL)" \
@@ -525,7 +517,7 @@ endif
 define Device/Build/compile
   $$(_COMPILE_TARGET): $(KDIR)/$(1)
   $(eval $(call Device/Export,$(KDIR)/$(1)))
-  $(KDIR)/$(1):
+  $(KDIR)/$(1): FORCE
 	$$(call concat_cmd,$(COMPILE/$(1)))
 
 endef
@@ -600,11 +592,11 @@ define Device/Build/image
   $(BUILD_DIR)/json_info_files/$(call DEVICE_IMG_NAME,$(1),$(2)).json: $(BIN_DIR)/$(call DEVICE_IMG_NAME,$(1),$(2))$$(GZ_SUFFIX)
 	@mkdir -p $$(shell dirname $$@)
 	DEVICE_ID="$(DEVICE_NAME)" \
-	BIN_DIR="$(BIN_DIR)" \
 	SOURCE_DATE_EPOCH=$(SOURCE_DATE_EPOCH) \
-	DEVICE_IMG_NAME="$(DEVICE_IMG_NAME)" \
-	IMAGE_TYPE=$(word 1,$(subst ., ,$(2))) \
-	IMAGE_FILESYSTEM="$(1)" \
+	FILE_NAME="$(DEVICE_IMG_NAME)" \
+	FILE_DIR="$(KDIR)/tmp" \
+	FILE_TYPE=$(word 1,$(subst ., ,$(2))) \
+	FILE_FILESYSTEM="$(1)" \
 	DEVICE_IMG_PREFIX="$(DEVICE_IMG_PREFIX)" \
 	DEVICE_VENDOR="$(DEVICE_VENDOR)" \
 	DEVICE_MODEL="$(DEVICE_MODEL)" \
@@ -630,7 +622,9 @@ define Device/Build/image
 endef
 
 define Device/Build/artifact
-  $$(_TARGET): $(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1)
+  $$(_TARGET): $(if $(CONFIG_JSON_OVERVIEW_IMAGE_INFO), \
+	  $(BUILD_DIR)/json_info_files/$(DEVICE_IMG_PREFIX)-$(1).json, \
+	  $(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1))
   $(eval $(call Device/Export,$(KDIR)/tmp/$(DEVICE_IMG_PREFIX)-$(1)))
   $(KDIR)/tmp/$(DEVICE_IMG_PREFIX)-$(1): $$(KDIR_KERNEL_IMAGE) $(2)-images
 	@rm -f $$@
@@ -641,6 +635,35 @@ define Device/Build/artifact
   $(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1): $(KDIR)/tmp/$(DEVICE_IMG_PREFIX)-$(1)
 	cp $$^ $$@
 
+  $(BUILD_DIR)/json_info_files/$(DEVICE_IMG_PREFIX)-$(1).json: $(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1)
+	@mkdir -p $$(shell dirname $$@)
+	DEVICE_ID="$(DEVICE_NAME)" \
+	SOURCE_DATE_EPOCH=$(SOURCE_DATE_EPOCH) \
+	FILE_NAME="$(DEVICE_IMG_PREFIX)-$(1)" \
+	FILE_DIR="$(KDIR)/tmp" \
+	FILE_TYPE="$(1)" \
+	DEVICE_IMG_PREFIX="$(DEVICE_IMG_PREFIX)" \
+	DEVICE_VENDOR="$(DEVICE_VENDOR)" \
+	DEVICE_MODEL="$(DEVICE_MODEL)" \
+	DEVICE_VARIANT="$(DEVICE_VARIANT)" \
+	DEVICE_ALT0_VENDOR="$(DEVICE_ALT0_VENDOR)" \
+	DEVICE_ALT0_MODEL="$(DEVICE_ALT0_MODEL)" \
+	DEVICE_ALT0_VARIANT="$(DEVICE_ALT0_VARIANT)" \
+	DEVICE_ALT1_VENDOR="$(DEVICE_ALT1_VENDOR)" \
+	DEVICE_ALT1_MODEL="$(DEVICE_ALT1_MODEL)" \
+	DEVICE_ALT1_VARIANT="$(DEVICE_ALT1_VARIANT)" \
+	DEVICE_ALT2_VENDOR="$(DEVICE_ALT2_VENDOR)" \
+	DEVICE_ALT2_MODEL="$(DEVICE_ALT2_MODEL)" \
+	DEVICE_ALT2_VARIANT="$(DEVICE_ALT2_VARIANT)" \
+	DEVICE_TITLE="$(DEVICE_TITLE)" \
+	DEVICE_PACKAGES="$(DEVICE_PACKAGES)" \
+	TARGET="$(BOARD)" \
+	SUBTARGET="$(if $(SUBTARGET),$(SUBTARGET),generic)" \
+	VERSION_NUMBER="$(VERSION_NUMBER)" \
+	VERSION_CODE="$(VERSION_CODE)" \
+	SUPPORTED_DEVICES="$(SUPPORTED_DEVICES)" \
+	$(TOPDIR)/scripts/json_add_image_info.py $$@
+
 endef
 
 define Device/Build
@@ -733,6 +756,7 @@ define BuildImage
 
   else
     image_prepare:
+		rm -rf $(KDIR)/tmp
 		mkdir -p $(BIN_DIR) $(KDIR)/tmp
   endif