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linksys_get_target_firmware() {
cur_boot_part=$(/usr/sbin/fw_printenv -n boot_part)
target_firmware=""
if [ "$cur_boot_part" = "1" ]; then
# current primary boot - update alt boot
target_firmware="alt_kernel"
fw_setenv boot_part 2
# In the Linksys EA6350v3, it is enough to set the boot_part as the boot command line is
# bootcmd=if test $boot_part = 1; then run bootpart1; else run bootpart2; fi
# - You probably want to use that if your device's uboot does not eval bootcmd
#fw_setenv bootcmd "run altnandboot"
elif [ "$cur_boot_part" = "2" ]; then
# current alt boot - update primary boot
target_firmware="kernel"
fw_setenv boot_part 1
#fw_setenv bootcmd "run nandboot"
fi
# re-enable recovery so we get back if the new firmware is broken
fw_setenv auto_recovery yes
# see /etc/init.d/zlinksys_recovery
echo "$target_firmware"
}
linksys_get_root_magic() {
(get_image "$@" | dd skip=786432 bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
}
platform_do_upgrade_linksys() {
local magic_long="$(get_magic_long "$1")"
mkdir -p /var/lock
local part_label="$(linksys_get_target_firmware)"
touch /var/lock/fw_printenv.lock
if [ ! -n "$part_label" ]; then
echo "cannot find target partition"
exit 1
fi
local target_mtd=$(find_mtd_part $part_label)
[ "$magic_long" = "73797375" ] && {
CI_KERNPART="$part_label"
if [ "$part_label" = "kernel" ]; then
CI_UBIPART="rootfs"
else
CI_UBIPART="alt_rootfs"
fi
# remove "squashfs" vol (in case we are flashing over a stock image, which is also UBI)
local mtdnum="$( find_mtd_index "$CI_UBIPART" )"
if [ ! "$mtdnum" ]; then
echo "cannot find ubi mtd partition $CI_UBIPART"
return 1
fi
local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
if [ ! "$ubidev" ]; then
ubiattach -m "$mtdnum"
sync
ubidev="$( nand_find_ubi "$CI_UBIPART" )"
fi
if [ "$ubidev" ]; then
local squash_ubivol="$( nand_find_volume $ubidev squashfs )"
# kill volume
[ "$squash_ubivol" ] && ubirmvol /dev/$ubidev -N squashfs || true
fi
# complete std upgrade
nand_upgrade_tar "$1"
}
[ "$magic_long" = "27051956" ] && {
# This magic is for a uImage (which is a sysupgrade image)
# check firmwares' rootfs types
local oldroot="$(linksys_get_root_magic $target_mtd)"
local newroot="$(linksys_get_root_magic "$1")"
if [ "$newroot" = "55424923" -a "$oldroot" = "55424923" ]; then
# we're upgrading from a firmware with UBI to one with UBI
# erase everything to be safe
# - Is that really needed? Won't remove (or comment) the if, because it may be needed in a future device.
#mtd erase $part_label
#get_image "$1" | mtd -n write - $part_label
echo "writing \"$1\" UBI image to \"$part_label\" (UBI)..."
get_image "$1" | mtd write - $part_label
else
echo "writing \"$1\" image to \"$part_label\""
get_image "$1" | mtd write - $part_label
fi
}
}
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