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CI_BLKSZ=65536
CI_LDADR=0x80041000
platform_find_partitions() {
local first dev size erasesize name
while read dev size erasesize name; do
name=${name#'"'}; name=${name%'"'}
case "$name" in
vmlinux.bin.l7|kernel|linux|rootfs)
if [ -z "$first" ]; then
first="$name"
else
echo "$erasesize:$first:$name"
break
fi
;;
esac
done < /proc/mtd
}
platform_find_kernelpart() {
local part
for part in "${1%:*}" "${1#*:}"; do
case "$part" in
vmlinux.bin.l7|kernel|linux)
echo "$part"
break
;;
esac
done
}
platform_check_image() {
[ "$#" -gt 1 ] && return 1
case "$(get_magic_word "$1")" in
# Combined Image
4349)
local md5_img=$(dd if="$1" bs=2 skip=9 count=16 2>/dev/null)
local md5_chk=$(dd if="$1" bs=$CI_BLKSZ skip=1 2>/dev/null | md5sum -); md5_chk="${md5_chk%% *}"
if [ -n "$md5_img" -a -n "$md5_chk" ] && [ "$md5_img" = "$md5_chk" ]; then
return 0
else
echo "Invalid image. Contents do not match checksum (image:$md5_img calculated:$md5_chk)"
return 1
fi
;;
*)
echo "Invalid image. Use combined .img files on this platform"
return 1
;;
esac
}
platform_do_upgrade() {
local partitions=$(platform_find_partitions)
local kernelpart=$(platform_find_kernelpart "${partitions#*:}")
local erase_size=$((0x${partitions%%:*})); partitions="${partitions#*:}"
local kern_length=0x$(dd if="$1" bs=2 skip=1 count=4 2>/dev/null)
local kern_blocks=$(($kern_length / $CI_BLKSZ))
local root_blocks=$((0x$(dd if="$1" bs=2 skip=5 count=4 2>/dev/null) / $CI_BLKSZ))
if [ -n "$partitions" ] && [ -n "$kernelpart" ] && \
[ ${kern_blocks:-0} -gt 0 ] && \
[ ${root_blocks:-0} -gt ${kern_blocks:-0} ] && \
[ ${erase_size:-0} -gt 0 ];
then
local append=""
[ -f "$UPGRADE_BACKUP" -a "$UPGRADE_OPT_SAVE_CONFIG" -eq 1 ] && append="-j $UPGRADE_BACKUP"
( dd if="$1" bs=$CI_BLKSZ skip=1 count=$kern_blocks 2>/dev/null; \
dd if="$1" bs=$CI_BLKSZ skip=$((1+$kern_blocks)) count=$root_blocks 2>/dev/null ) | \
mtd -r $append -F$kernelpart:$kern_length:$CI_LDADR,rootfs write - $partitions
fi
}
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