1 # Copyright (C) 2019 OpenWrt.org
4 .
/lib
/functions
/system.sh
17 mtd
=$
(find_mtd_chardev
$part)
18 [ -n "$mtd" ] || caldata_die
"no mtd device found for partition $part"
20 dd if=$mtd of
=/lib
/firmware
/$FIRMWARE iflag
=skip_bytes bs
=$count skip
=$offset count
=1 2>/dev
/null || \
21 caldata_die
"failed to extract calibration data from $mtd"
24 caldata_extract_ubi
() {
31 .
/lib
/upgrade
/nand.sh
33 ubidev
=$
(nand_find_ubi
$CI_UBIPART)
34 ubi
=$
(nand_find_volume
$ubidev $part)
35 [ -n "$ubi" ] || caldata_die
"no UBI volume found for $part"
37 dd if=/dev
/$ubi of
=/lib
/firmware
/$FIRMWARE iflag
=skip_bytes bs
=$count skip
=$offset count
=1 2>/dev
/null || \
38 caldata_die
"failed to extract calibration data from $ubi"
41 caldata_extract_reverse
() {
49 mtd
=$
(find_mtd_chardev
"$part")
50 reversed
=$
(hexdump -v -s $offset -n $count -e '/1 "%02x "' $mtd)
52 for byte
in $reversed; do
53 caldata
="\x${byte}${caldata}"
56 printf "%b" "$caldata" > /lib
/firmware
/$FIRMWARE
64 dd if=$source of
=/lib
/firmware
/$FIRMWARE iflag
=skip_bytes bs
=$count skip
=$offset count
=1 2>/dev
/null || \
65 caldata_die
"failed to extract calibration data from $source"
71 magic
=$
(hexdump -v -n 2 -e '1/1 "%02x"' /lib
/firmware
/$FIRMWARE)
72 [[ "$magic" == "$expected" ]]