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ipq40xx: sysupgrade: allow flashing Linksys factory firmware

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Allow forced flashing of a factory firmware image, after checking for the
correct FIT magic header and Linksys board-specific footer. Details of the
footer are already described in scripts/linksys-image.sh.

This is convenient as it avoids using a TFTP server or OEM GUI, and allows
restoring OEM firmware or installing a "breaking" OpenWrt update (e.g DSA
migration and kernel repartition) directly from the command line.

Devices supported at this time include EA6350v3, EA8300, MR8300 and WHW01.

Reviewed-by: Robert Marko <robimarko@gmail.com>
Tested-by:  Wyatt Martin <wawowl@gmail.com> # WHW01
Tested-by:  Tony Ambardar <itugrok@yahoo.com> # EA6350v3
Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
This commit is contained in:
Tony Ambardar 2022-12-01 18:00:30 -08:00
parent 9cbc825b30
commit 6fc334cbdc
1 changed files with 18 additions and 0 deletions
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18
target/linux/ipq40xx/base-files/lib/upgrade/linksys.sh Executable file → Normal file
View File

@ -47,6 +47,14 @@ linksys_get_target_firmware() {
esac esac
} }
linksys_is_factory_image() {
local board=$(board_name)
board=${board##*,}
# check matching footer signature
tail -c 256 $1 | grep -q -i "\.LINKSYS\.........${board}"
}
platform_do_upgrade_linksys() { platform_do_upgrade_linksys() {
local magic_long="$(get_magic_long "$1")" local magic_long="$(get_magic_long "$1")"
@ -99,4 +107,14 @@ platform_do_upgrade_linksys() {
echo "writing \"$1\" image to \"$part_label\"" echo "writing \"$1\" image to \"$part_label\""
get_image "$1" | mtd write - "$part_label" get_image "$1" | mtd write - "$part_label"
} }
[ "$magic_long" = "d00dfeed" ] && {
if ! linksys_is_factory_image "$1"; then
echo "factory image doesn't match device"
return 1
fi
echo "writing \"$1\" factory image to \"$part_label\""
get_image "$1" | mtd -e "$part_label" write - "$part_label"
}
} }