#!/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 iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
		ath9k_eeprom_die "failed to extract from $mtd"
}

ath9k_ubi_eeprom_extract() {
	local part=$1
	local offset=$2
	local count=$3
	local ubidev=$(nand_find_ubi $CI_UBIPART)
	local ubi

	ubi=$(nand_find_volume $ubidev $part)
	[ -n "$ubi" ] || \
		ath9k_eeprom_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 || \
		ath9k_eeprom_die "failed to extract from $ubi"
}

ath9k_patch_firmware_mac() {
        local mac=$1

        [ -z "$mac" ] && return

        macaddr_2bin $mac | dd of=/lib/firmware/$FIRMWARE conv=notrunc bs=1 seek=2 count=6
}

board=$(board_name)

case "$FIRMWARE" in
"pci_wmac0.eeprom")
	case $board in
	netgear,wndr4700)
		. /lib/upgrade/nand.sh

		if [ -n "$(nand_find_volume ubi0 caldata)" ]; then
			ath9k_ubi_eeprom_extract "caldata" 20480 4096
		else
			ath9k_eeprom_extract "wifi_data" 20480 4096
			ath9k_patch_firmware_mac $(mtd_get_mac_binary wifi_data 12)
		fi
		;;
	*)
		ath9k_eeprom_die "board $board is not supported yet"
		;;
	esac
	;;

"pci_wmac1.eeprom")
	case $board in
	netgear,wndr4700)
		. /lib/upgrade/nand.sh

		if [ -n "$(nand_find_volume ubi0 caldata)" ]; then
			ath9k_ubi_eeprom_extract "caldata" 4096 4096
		else
			ath9k_eeprom_extract "wifi_data" 4096 4096
			ath9k_patch_firmware_mac $(mtd_get_mac_binary wifi_data 0)
		fi
		;;
	*)
		ath9k_eeprom_die "board $board is not supported yet"
		;;
	esac
	;;
esac
