openwrt/target/linux/ath79/image/common-engenius.mk
Michael Pratt 0070650df4 ath79: move small-flash Engenius boards to tiny
This moves some of the Engenius boards from generic to tiny:

 - EAP350 v1
 - ECB350 v1
 - ENH202 v1

For these, factory.bin builds are already failing on master
branch because of the unique situation for these boards:

 - 8 MB flash
 - an extra "failsafe" image for recovery
 - TFTP does not work (barely possible with 600 MTU)
 - bootloader loads image from a longer flash offset
 - 1 eraseblock each needed for OKLI kernel loader and fake rootfs
 - using mtd-concat to make use of remaining space...

The manual alternative would be removing the failsafe partition.
However this comes with the risk of extremely difficult recovery
if a flash ever fails because TFTP on the bootloader is bugged.
Signed-off-by: Michael Pratt <mcpratt@pm.me>
[improve commit message]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2021-01-07 19:51:50 +01:00

34 lines
1.3 KiB
Makefile

DEVICE_VARS += ENGENIUS_IMGNAME
# This needs to make /tmp/_sys/sysupgrade.tgz an empty file prior to
# sysupgrade, as otherwise it will implant the old configuration from
# OEM firmware when writing rootfs from factory.bin
define Build/engenius-tar-gz
-[ -f "$@" ] && \
mkdir -p $@.tmp && \
touch $@.tmp/failsafe.bin && \
echo '#!/bin/sh' > $@.tmp/before-upgrade.sh && \
echo ': > /tmp/_sys/sysupgrade.tgz' >> $@.tmp/before-upgrade.sh && \
$(CP) $(KDIR)/loader-$(DEVICE_NAME).uImage \
$@.tmp/openwrt-$(word 1,$(1))-uImage-lzma.bin && \
$(CP) $@ $@.tmp/openwrt-$(word 1,$(1))-root.squashfs && \
$(TAR) -cp --numeric-owner --owner=0 --group=0 --mode=a-s --sort=name \
$(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)") \
-C $@.tmp . | gzip -9n > $@ && \
rm -rf $@.tmp
endef
define Device/engenius_loader_okli
DEVICE_VENDOR := EnGenius
KERNEL := kernel-bin | append-dtb | lzma | uImage lzma -M 0x4f4b4c49
LOADER_TYPE := bin
COMPILE := loader-$(1).bin loader-$(1).uImage
COMPILE/loader-$(1).bin := loader-okli-compile
COMPILE/loader-$(1).uImage := append-loader-okli $(1) | pad-to 64k | lzma | \
uImage lzma
IMAGES += factory.bin
IMAGE/factory.bin := append-squashfs-fakeroot-be | pad-to $$$$(BLOCKSIZE) | \
append-kernel | pad-to $$$$(BLOCKSIZE) | append-rootfs | pad-rootfs | \
check-size | engenius-tar-gz $$$$(ENGENIUS_IMGNAME)
endef