#!/bin/sh

[ -e /lib/firmware/$FIRMWARE ] && exit 0

. /lib/functions.sh
. /lib/functions/system.sh

ath9k_eeprom_die() {
	echo "ath9k eeprom: " "$*"
	exit 1
}

ath9k_eeprom_extract() {
	local part=$1
	local offset=$2
	local count=$3
	local mtd

	mtd=$(find_mtd_chardev $part)
	[ -n "$mtd" ] || \
		ath9k_eeprom_die "no mtd device found for partition $part"

	dd if=$mtd of=/lib/firmware/$FIRMWARE bs=1 skip=$offset count=$count 2>/dev/null || \
		ath9k_eeprom_die "failed to extract from $mtd"
}

ath9k_eeprom_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
}

board=$(board_name)

case "$FIRMWARE" in
"ath9k-eeprom-pci-0000:00:00.0.bin")
	case $board in
	avm,fritz300e)
		ath9k_eeprom_extract_reverse "urloader" 5441 1088
		;;
	ocedo,raccoon|\
	tplink,tl-wdr3600|\
	tplink,tl-wdr4300|\
	tplink,tl-wdr4900-v2)
		ath9k_eeprom_extract "art" 20480 1088
		;;
	netgear,wnr612-v2|\
	on,n150r|\
	pcs,cap324|\
	tplink,tl-mr3220-v1|\
	tplink,tl-mr3420-v1|\
	tplink,tl-wr2543-v1|\
	tplink,tl-wr740n-v1|\
	tplink,tl-wr740n-v3|\
	tplink,tl-wr741-v1|\
	tplink,tl-wr743nd-v1|\
	tplink,tl-wr841-v7|\
	ubnt,unifi)
		ath9k_eeprom_extract "art" 4096 2048
		;;
	tplink,tl-wr841-v5|\
	tplink,tl-wr941-v4)
		ath9k_eeprom_extract "art" 4096 3768
		;;
	*)
		ath9k_eeprom_die "board $board is not supported yet"
		;;
	esac
	;;
esac