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# Copyright (C) 2019 OpenWrt.org
. /lib/functions.sh
. /lib/functions/system.sh
caldata_die() {
echo "caldata: " "$*"
exit 1
}
caldata_extract() {
local part=$1
local offset=$(($2))
local count=$(($3))
local mtd
mtd=$(find_mtd_chardev $part)
[ -n "$mtd" ] || caldata_die "no mtd device found for partition $part"
dd if=$mtd of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
caldata_die "failed to extract calibration data from $mtd"
}
caldata_extract_ubi() {
local part=$1
local offset=$(($2))
local count=$(($3))
local ubidev
local ubi
. /lib/upgrade/nand.sh
ubidev=$(nand_find_ubi $CI_UBIPART)
ubi=$(nand_find_volume $ubidev $part)
[ -n "$ubi" ] || caldata_die "no UBI volume found for $part"
dd if=/dev/$ubi of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
caldata_die "failed to extract calibration data from $ubi"
}
caldata_extract_reverse() {
local part=$1
local offset=$2
local count=$(($3))
local mtd
local reversed
local caldata
mtd=$(find_mtd_chardev "$part")
reversed=$(hexdump -v -s $offset -n $count -e '/1 "%02x "' $mtd)
for byte in $reversed; do
caldata="\x${byte}${caldata}"
done
printf "%b" "$caldata" > /lib/firmware/$FIRMWARE
}
caldata_from_file() {
local source=$1
local offset=$(($2))
local count=$(($3))
dd if=$source of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
caldata_die "failed to extract calibration data from $source"
}
caldata_valid() {
local expected="$1"
magic=$(hexdump -v -n 2 -e '1/1 "%02x"' /lib/firmware/$FIRMWARE)
[[ "$magic" == "$expected" ]]
return $?
}
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