openwrt/target/linux/brcm63xx/base-files/etc/hotplug.d/firmware/10-rt2x00-eeprom

#!/bin/sh
# Based on gabors ralink wisoc implementation.

rt2x00_eeprom_die() {
	echo "rt2x00 eeprom: " "$*"
	exit 1
}

rt2x00_eeprom_extract() {
	local part=$1
	local offset=$(($2))
	local count=$(($3))
	local mtd

	mtd=$(find_mtd_part $part)
	[ -n "$mtd" ] || \
		rt2x00_eeprom_die "no mtd device found for partition $part"

	dd if=$mtd of=/lib/firmware/$FIRMWARE bs=1 skip=$offset count=$count || \
		rt2x00_eeprom_die "failed to extract from $mtd"
}

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

. /lib/functions.sh

board=$(board_name)

case "$FIRMWARE" in
"rt2x00.eeprom" )
	case $board in
	hg556a_c)
		rt2x00_eeprom_extract "cal_data" 0x1fe00 0x200
		;;
	hg622 |\
	hg655b)
		rt2x00_eeprom_extract "cal_data" 0x0 0x200
		;;
	*)
		rt2x00_eeprom_die "board $board is not supported yet"
		;;
	esac
	;;
esac