ramips: split base-files into subtargets

While most of the target's contents are split into subtargets, the
base-files are maintained for the target as a whole.

However, OpenWrt already implements a mechanism that will use (and
even prefer) files in the subtargets' directories. This can be
exploited to make several scripts subtarget-specific and thus save
some space.

In certain cases, keeping files in parent (=target) base-files was
more convenient, and thus no splitting was performed for those.

Note that this will increase overall code lines, but reduce code
per subtarget.

base-files ipk size reduction:
master (mt7621)   60958 B
split (mt7620)    46358 B (- 14.3 kiB)
split (mt7621)    48759 B (- 11.9 kiB)
split (mt76x8)    44948 B (- 15.6 kiB)
split (rt288x)    43508 B (- 17.0 kiB)
split (rt305x)    45616 B (- 15.0 kiB)
split (rt3883)    44176 B (- 16.4 kiB)

Run-tested on:
GL.iNet GL-MT300N-V2 (mt76x8)
D-Link DWR-116 (mt7620)

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

6 files changed, 559 insertions, 0 deletions

diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds b/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
new file mode 100755
index 0000000000..4eab8f42fe
--- /dev/null
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
@@ -0,0 +1,83 @@
+#!/bin/sh
+
+. /lib/functions/leds.sh
+. /lib/functions/uci-defaults.sh
+
+set_wifi_led() {
+	ucidef_set_led_netdev "wifi_led" "wifi" "${1}" "${2:-wlan0}"
+}
+
+
+board=$(board_name)
+boardname="${board##*,}"
+
+board_config_update
+
+led_wlan="$(get_dt_led wlan)"
+[ -n "$led_wlan" ] && ucidef_set_led_wlan "wifi_led" "wifi" "$led_wlan" "phy0tpt"
+
+case $board in
+d-team,newifi-d2)
+	ucidef_set_led_switch "internet" "internet" "$boardname:amber:internet" "switch0" "0x10"
+	ucidef_set_led_netdev "wlan2g" "WiFi 2.4GHz" "$boardname:blue:wlan2g" "wlan0"
+	ucidef_set_led_netdev "wlan5g" "WiFi 5GHz" "$boardname:blue:wlan5g" "wlan1"
+	;;
+d-team,pbr-m1|\
+gehua,ghl-r-001)
+	ucidef_set_led_netdev "internet" "internet" "$boardname:blue:internet" "eth0.2"
+	;;
+dlink,dir-860l-b1)
+	ucidef_set_led_netdev "wan" "wan" "$boardname:green:net" "eth0.2"
+	;;
+gnubee,gb-pc1|\
+gnubee,gb-pc2)
+	ucidef_set_led_switch "lan1" "lan1" "$boardname:green:lan1" "switch0" "0x01"
+	ucidef_set_led_switch "lan2" "lan2" "$boardname:green:lan2" "switch0" "0x10"
+	;;
+mikrotik,rbm11g)
+	ucidef_set_rssimon "wlan0" "200000" "1"
+	ucidef_set_led_rssi "rssilow" "RSSILOW" "$boardname:green:rssi0" "wlan0" "1" "100"
+	ucidef_set_led_rssi "rssimediumlow" "RSSIMEDIUMLOW" "$boardname:green:rssi1" "wlan0" "20" "100"
+	ucidef_set_led_rssi "rssimediumhigh" "RSSIMEDIUMHIGH" "$boardname:green:rssi2" "wlan0" "40" "100"
+	ucidef_set_led_rssi "rssihigh" "RSSIHIGH" "$boardname:green:rssi3" "wlan0" "60" "100"
+	ucidef_set_led_rssi "rssiveryhigh" "RSSIVERYHIGH" "$boardname:green:rssi4" "wlan0" "80" "100"
+	;;
+mtc,wr1201)
+	ucidef_set_led_switch "eth_link" "LAN link" "$boardname:green:eth_link" "switch0" "0x0f"
+	;;
+netgear,r6220|\
+netgear,r6260|\
+netgear,r6350|\
+netgear,r6850|\
+netgear,wndr3700-v5)
+	ucidef_set_led_switch "wan" "wan" "$boardname:green:wan" "switch0" "0x10"
+	;;
+tplink,re350-v1|\
+tplink,re650-v1)
+	ucidef_set_led_netdev "wifi2g" "Wifi 2.4G" "$boardname:blue:wifi2G" "wlan0"
+	ucidef_set_led_netdev "wifi5g" "Wifi 5G" "$boardname:blue:wifi5G" "wlan1"
+	ucidef_set_led_netdev "eth_act" "LAN act" "$boardname:green:eth_act" "eth0" "tx rx"
+	ucidef_set_led_switch "eth_link" "LAN link" "$boardname:green:eth_link" "switch0" "0x01"
+	;;
+xiaomi,mir3g)
+	ucidef_set_led_switch "wan-amber"  "WAN (amber)"  "$boardname:amber:wan"  "switch0" "0x02" "0x08"
+	ucidef_set_led_switch "lan1-amber" "LAN1 (amber)" "$boardname:amber:lan1" "switch0" "0x08" "0x08"
+	ucidef_set_led_switch "lan2-amber" "LAN2 (amber)" "$boardname:amber:lan2" "switch0" "0x04" "0x08"
+	;;
+xiaomi,mir3p)
+	ucidef_set_led_switch "wan-amber"  "WAN (amber)"  "$boardname:amber:wan"  "switch0" "0x10" "0x08"
+	ucidef_set_led_switch "lan1-amber" "LAN1 (amber)" "$boardname:amber:lan1" "switch0" "0x02" "0x08"
+	ucidef_set_led_switch "lan2-amber" "LAN2 (amber)" "$boardname:amber:lan2" "switch0" "0x04" "0x08"
+	ucidef_set_led_switch "lan3-amber" "LAN3 (amber)" "$boardname:amber:lan3" "switch0" "0x08" "0x08"
+	;;
+xzwifi,creativebox-v1)
+	ucidef_set_led_switch "internet" "internet" "$boardname:blue:internet" "switch0" "0x10"
+	;;
+youhua,wr1200js)
+	ucidef_set_led_switch "internet" "INTERNET" "$boardname:green:wan" "switch0" "0x01"
+	;;
+esac
+
+board_config_flush
+
+exit 0
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
new file mode 100755
index 0000000000..11cf27e092
--- /dev/null
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
@@ -0,0 +1,238 @@
+#!/bin/sh
+
+. /lib/functions.sh
+. /lib/functions/uci-defaults.sh
+. /lib/functions/system.sh
+
+ramips_setup_interfaces()
+{
+	local board="$1"
+
+	case $board in
+	adslr,g7|\
+	afoundry,ew1200|\
+	d-team,pbr-m1|\
+	firefly,firewrt|\
+	hiwifi,hc5962|\
+	mediatek,ap-mt7621a-v60|\
+	mediatek,mt7621-eval-board|\
+	mqmaker,witi|\
+	mtc,wr1201|\
+	netis,wf-2881|\
+	phicomm,k2p|\
+	planex,vr500|\
+	samknows,whitebox-v8|\
+	storylink,sap-g3200u3|\
+	telco-electronics,x1|\
+	totolink,a7000r|\
+	unielec,u7621-06-16m|\
+	unielec,u7621-06-64m|\
+	xiaoyu,xy-c5|\
+	xzwifi,creativebox-v1|\
+	youku,yk-l2|\
+	zbtlink,zbt-we1326|\
+	zbtlink,zbt-we3526|\
+	zbtlink,zbt-wg2626|\
+	zbtlink,zbt-wg3526-16m|\
+	zbtlink,zbt-wg3526-32m)
+		ucidef_add_switch "switch0" \
+			"0:lan" "1:lan" "2:lan" "3:lan" "4:wan" "6@eth0"
+		;;
+	asiarf,ap7621-001)
+		ucidef_add_switch "switch0" "0:lan" "4:wan" "6@eth0"
+		;;
+	asiarf,ap7621-nv1)
+		ucidef_add_switch "switch0" "0:wan" "2:lan" "3:lan" "6@eth0"
+		;;
+	asus,rt-ac57u|\
+	mikrotik,rb750gr3|\
+	mikrotik,rbm33g|\
+	ubiquiti,edgerouterx|\
+	ubiquiti,edgerouterx-sfp|\
+	youhua,wr1200js)
+		ucidef_add_switch "switch0" \
+			"1:lan" "2:lan" "3:lan" "4:lan" "0:wan" "6@eth0"
+		;;
+	asus,rt-ac65p|\
+	asus,rt-ac85p|\
+	dlink,dir-860l-b1|\
+	elecom,wrc-1167ghbk2-s|\
+	elecom,wrc-1900gst|\
+	elecom,wrc-2533gst|\
+	iodata,wn-ax1167gr|\
+	iodata,wn-gx300gr|\
+	iodata,wnpr2600g)
+		ucidef_add_switch "switch0" \
+			"1:lan:4" "2:lan:3" "3:lan:2" "4:lan:1" "0:wan" "6@eth0"
+		;;
+	buffalo,wsr-1166dhp|\
+	buffalo,wsr-600dhp)
+		ucidef_add_switch "switch0" \
+			"0:lan:1" "1:lan:2" "2:lan:3" "3:lan:4" "4:wan:5" "6@eth0"
+		;;
+	d-team,newifi-d2|\
+	wevo,11acnas|\
+	wevo,w2914ns-v2)
+		ucidef_add_switch "switch0" \
+			"0:lan:4" "1:lan:3" "2:lan:2" "3:lan:1" "4:wan:5" "6@eth0"
+		;;
+	edimax,rg21s)
+		ucidef_add_switch "switch0" \
+			"1:lan:4" "2:lan:3" "3:lan:2" "4:lan:1" "0:wan" "6@eth0"
+		;;
+	gehua,ghl-r-001)
+		ucidef_add_switch "switch0" \
+			"0:lan" "1:lan" "2:lan" "4:wan" "6@eth0"
+		;;
+	gnubee,gb-pc1|\
+	gnubee,gb-pc2)
+		ucidef_add_switch "switch0" \
+			"0:lan" "4:lan" "6@eth0"
+		;;
+	lenovo,newifi-d1)
+		ucidef_add_switch "switch0" \
+		"1:lan:2" "2:lan:1" "4:wan" "6@eth0"
+		;;
+	linksys,re6500)
+		ucidef_add_switch "switch0" \
+			"0:lan:1" "1:lan:2" "2:lan:3" "3:lan:4" "6@eth0"
+		;;
+	mikrotik,rbm11g|\
+	thunder,timecloud)
+		ucidef_add_switch "switch0"
+		ucidef_add_switch_attr "switch0" "enable" "false"
+		ucidef_set_interface_lan "eth0"
+		;;
+	netgear,ex6150|\
+	tplink,re350-v1|\
+	tplink,re650-v1)
+		ucidef_add_switch "switch0" \
+			"0:lan" "6@eth0"
+		;;
+	netgear,r6220|\
+	netgear,r6260|\
+	netgear,r6350|\
+	netgear,r6850|\
+	netgear,wndr3700-v5)
+		ucidef_add_switch "switch0" \
+			"0:lan:4" "1:lan:3" "2:lan:2" "3:lan:1" "4:wan" "6@eth0"
+		;;
+	xiaomi,mir3g)
+		ucidef_add_switch "switch0" \
+			"2:lan:2" "3:lan:1" "1:wan" "6t@eth0"
+		;;
+	xiaomi,mir3g-v2)
+		ucidef_add_switch "switch0" \
+			"2:lan:2" "3:lan:1" "4:wan" "6@eth0"
+		;;
+	xiaomi,mir3p)
+		ucidef_add_switch "switch0" \
+			"1:lan:3" "2:lan:2" "3:lan:1" "4:wan" "6@eth0"
+		;;
+	*)
+		ucidef_set_interfaces_lan_wan "eth0.1" "eth0.2"
+		;;
+	esac
+}
+
+ramips_setup_macs()
+{
+	local board="$1"
+	local lan_mac=""
+	local wan_mac=""
+	local label_mac=""
+
+	case $board in
+	asus,rt-ac57u|\
+	d-team,newifi-d2|\
+	d-team,pbr-m1|\
+	elecom,wrc-1167ghbk2-s|\
+	elecom,wrc-1900gst|\
+	elecom,wrc-2533gst|\
+	lenovo,newifi-d1|\
+	phicomm,k2p|\
+	planex,vr500|\
+	samknows,whitebox-v8|\
+	youhua,wr1200js|\
+	youku,yk-l2|\
+	zbtlink,zbt-we3526)
+		wan_mac=$(mtd_get_mac_binary factory 0xe006)
+		;;
+	asus,rt-ac65p|\
+	asus,rt-ac85p)
+		wan_mac=$(mtd_get_mac_ascii u-boot-env et1macaddr)
+		label_mac=$(cat /sys/class/ieee80211/phy0/macaddress)
+		;;
+	buffalo,wsr-1166dhp)
+		local index="$(find_mtd_index "board_data")"
+		wan_mac="$(grep -m1 mac= "/dev/mtd${index}" | cut -d= -f2)"
+		lan_mac=$wan_mac
+		;;
+	buffalo,wsr-600dhp)
+		# This empty case has to be kept for devices without any MAC address adjustments
+		;;
+	dlink,dir-860l-b1)
+		lan_mac=$(mtd_get_mac_ascii factory lanmac)
+		wan_mac=$(mtd_get_mac_ascii factory wanmac)
+		label_mac=$(cat /sys/class/ieee80211/phy1/macaddress)
+		;;
+	edimax,rg21s)
+		lan_mac=$(mtd_get_mac_ascii u-boot-env ethaddr)
+		wan_mac=$(mtd_get_mac_ascii u-boot-env wanaddr)
+		;;
+	hiwifi,hc5962)
+		lan_mac=$(mtd_get_mac_ascii bdinfo "Vfac_mac ")
+		label_mac=$lan_mac
+		[ -n "$lan_mac" ] || lan_mac=$(cat /sys/class/net/eth0/address)
+		wan_mac=$(macaddr_add "$lan_mac" 1)
+		;;
+	iodata,wn-ax1167gr|\
+	iodata,wn-gx300gr)
+		wan_mac=$(macaddr_add "$(mtd_get_mac_binary factory 0x4)" 1)
+		;;
+	iodata,wnpr2600g)
+		wan_mac=$(mtd_get_mac_ascii u-boot-env wanaddr)
+		label_mac=$wan_mac
+		;;
+	netgear,r6260|\
+	netgear,r6350|\
+	netgear,r6850)
+		wan_mac=$(macaddr_add "$(cat /sys/class/net/eth0/address)" 2)
+		;;
+	xiaomi,mir3g)
+		lan_mac=$(mtd_get_mac_binary factory 0xe006)
+		;;
+	xiaomi,mir3g-v2)
+		wan_mac=$(mtd_get_mac_binary factory 0xe006)
+		label_mac=$wan_mac
+		;;
+	xiaomi,mir3p)
+		lan_mac=$(mtd_get_mac_binary factory 0xe006)
+		label_mac=$lan_mac
+		;;
+	zbtlink,zbt-we1326)
+		wan_mac=$(mtd_get_mac_binary factory 0xe006)
+		label_mac=$(cat /sys/class/ieee80211/phy0/macaddress)
+		;;
+	zbtlink,zbt-wg3526-16m|\
+	zbtlink,zbt-wg3526-32m)
+		wan_mac=$(macaddr_add "$(cat /sys/class/net/eth0/address)" 1)
+		label_mac=$(cat /sys/class/ieee80211/phy0/macaddress)
+		;;
+	*)
+		wan_mac=$(macaddr_add "$(cat /sys/class/net/eth0/address)" 1)
+		;;
+	esac
+
+	[ -n "$lan_mac" ] && ucidef_set_interface_macaddr "lan" $lan_mac
+	[ -n "$wan_mac" ] && ucidef_set_interface_macaddr "wan" $wan_mac
+	[ -n "$label_mac" ] && ucidef_set_label_macaddr $label_mac
+}
+
+board_config_update
+board=$(board_name)
+ramips_setup_interfaces $board
+ramips_setup_macs $board
+board_config_flush
+
+exit 0
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/03_gpio_switches b/target/linux/ramips/mt7621/base-files/etc/board.d/03_gpio_switches
new file mode 100755
index 0000000000..d3bc85f827
--- /dev/null
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/03_gpio_switches
@@ -0,0 +1,30 @@
+#!/bin/sh
+
+. /lib/functions/uci-defaults.sh
+
+board_config_update
+
+board=$(board_name)
+
+case "$board" in
+mikrotik,rb750gr3)
+	ucidef_add_gpio_switch "poe_passthrough" "PoE Passthrough" "17"
+	;;
+telco-electronics,x1)
+	ucidef_add_gpio_switch "modem_reset" "Modem Reset" "16"
+	;;
+ubiquiti,edgerouterx)
+	ucidef_add_gpio_switch "poe_passthrough" "PoE Passthrough" "0"
+	;;
+ubiquiti,edgerouterx-sfp)
+	ucidef_add_gpio_switch "poe_power_port0" "PoE Power Port0" "496"
+	ucidef_add_gpio_switch "poe_power_port1" "PoE Power Port1" "497"
+	ucidef_add_gpio_switch "poe_power_port2" "PoE Power Port2" "498"
+	ucidef_add_gpio_switch "poe_power_port3" "PoE Power Port3" "499"
+	ucidef_add_gpio_switch "poe_power_port4" "PoE Power Port4" "500"
+	;;
+esac
+
+board_config_flush
+
+exit 0
diff --git a/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh b/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh
new file mode 100755
index 0000000000..f8aa0373a0
--- /dev/null
+++ b/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh
@@ -0,0 +1,50 @@
+#
+# Copyright (C) 2010 OpenWrt.org
+#
+
+PART_NAME=firmware
+REQUIRE_IMAGE_METADATA=1
+
+platform_check_image() {
+	return 0
+}
+
+platform_do_upgrade() {
+	local board=$(board_name)
+
+	case "$board" in
+	mikrotik,rb750gr3|\
+	mikrotik,rbm11g|\
+	mikrotik,rbm33g)
+		[ -z "$(rootfs_type)" ] && mtd erase firmware
+		;;
+	asus,rt-ac65p|\
+	asus,rt-ac85p)
+		echo "Backing up firmware"
+		dd if=/dev/mtd4 bs=1024 count=4096  > /tmp/backup_firmware.bin
+		dd if=/dev/mtd5 bs=1024 count=52224 >> /tmp/backup_firmware.bin
+		mtd -e firmware2 write /tmp/backup_firmware.bin firmware2
+		;;
+	esac
+
+	case "$board" in
+	asus,rt-ac65p|\
+	asus,rt-ac85p|\
+	hiwifi,hc5962|\
+	netgear,r6220|\
+	netgear,r6260|\
+	netgear,r6350|\
+	netgear,r6850|\
+	xiaomi,mir3g|\
+	xiaomi,mir3p)
+		nand_do_upgrade "$1"
+		;;
+	ubiquiti,edgerouterx|\
+	ubiquiti,edgerouterx-sfp)
+		platform_upgrade_ubnt_erx "$1"
+		;;
+	*)
+		default_do_upgrade "$1"
+		;;
+	esac
+}
diff --git a/target/linux/ramips/mt7621/base-files/lib/upgrade/ubnt.sh b/target/linux/ramips/mt7621/base-files/lib/upgrade/ubnt.sh
new file mode 100644
index 0000000000..748ec8e628
--- /dev/null
+++ b/target/linux/ramips/mt7621/base-files/lib/upgrade/ubnt.sh
@@ -0,0 +1,78 @@
+#
+# Copyright (C) 2015 OpenWrt.org
+#
+
+. /lib/functions.sh
+#Note: this code also uses some functions from nand.sh, but it is expected to be run by nand.sh, so we are not
+#sourcing it explicitly here
+
+UBNT_ERX_KERNEL_INDEX_OFFSET=160
+
+ubnt_get_target_kernel() {
+	local factory_mtd=$1
+	local current_kernel_index=$(hexdump -s $UBNT_ERX_KERNEL_INDEX_OFFSET -n 1 -e '/1 "%X "' ${factory_mtd})
+
+	if [ $current_kernel_index == "0" ]; then
+		echo 'kernel2'
+	elif [ $current_kernel_index == "1" ]; then
+		echo 'kernel1'
+	fi
+}
+
+ubnt_update_target_kernel() {
+	local factory_mtd=$1
+	local kernel_part=$2
+
+	local new_kernel_index
+	if [ $kernel_part == "kernel1" ]; then
+		new_kernel_index="\x00"
+	elif [ $kernel_part == "kernel2" ]; then
+		new_kernel_index="\x01"
+	else
+		echo 'Unknown kernel image index' >&2
+		return 1
+	fi
+
+	if ! (echo -e $new_kernel_index | dd of=${factory_mtd} bs=1 count=1 seek=$UBNT_ERX_KERNEL_INDEX_OFFSET); then
+		echo 'Failed to update kernel bootup index' >&2
+		return 1
+	fi
+}
+
+platform_upgrade_ubnt_erx() {
+	local factory_mtd=$(find_mtd_part factory)
+	if [ -z "$factory_mtd" ]; then
+		echo "cannot find factory partition" >&2
+		exit 1
+	fi
+
+	local kernel_part="$(ubnt_get_target_kernel ${factory_mtd})"
+	if [ -z "$kernel_part" ]; then
+		echo "cannot find factory partition" >&2
+		exit 1
+	fi
+
+	# This is a global defined in nand.sh, sets partition kernel will be flashed into
+	CI_KERNPART=${kernel_part}
+
+	#Remove volume possibly left over from stock firmware
+	local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
+	if [ -z "$ubidev" ]; then
+		local mtdnum="$( find_mtd_index "$CI_UBIPART" )"
+		if [ -z "$mtdnum" ]; then
+			echo "cannot find ubi mtd partition $CI_UBIPART" >&2
+			exit 1
+		fi
+		ubiattach -m "$mtdnum"
+		sync
+		ubidev="$( nand_find_ubi "$CI_UBIPART" )"
+	fi
+	if [ -n "$ubidev" ]; then
+		local troot_ubivol="$( nand_find_volume $ubidev troot )"
+		[ -n "$troot_ubivol" ] && ubirmvol /dev/$ubidev -N troot || true
+	fi
+
+	ubnt_update_target_kernel ${factory_mtd} ${kernel_part} || exit 1
+
+	nand_do_upgrade "$1"
+}
diff --git a/target/linux/ramips/mt7621/base-files/sbin/fixup-mac-address b/target/linux/ramips/mt7621/base-files/sbin/fixup-mac-address
new file mode 100755
index 0000000000..dad15c5842
--- /dev/null
+++ b/target/linux/ramips/mt7621/base-files/sbin/fixup-mac-address
@@ -0,0 +1,80 @@
+#!/bin/sh
+. /lib/functions.sh
+. /lib/functions/system.sh
+
+partname=""
+offset=""
+NEW_MAC=
+YES=
+
+board=$(board_name)
+case $board in
+	mqmaker,witi)
+		partname=factory
+		offset=$((0xe000))
+	;;
+	*)
+		echo "Unsupported board"
+		exit 1
+	;;
+esac
+
+while [ -n "$1" ]; do
+	case "$1" in
+		??:??:??:??:??:??) NEW_MAC="$1";;
+		-y) YES=1;;
+		*)
+			cat <<EOF
+Unknown option/argument '$1'
+Usage: $0 [-y] [<macaddr>]
+EOF
+			exit 1
+		;;
+	esac
+	shift
+done
+
+ask_bool() {
+	local message="$1"
+	local default="$((! ${2:-0}))"
+	[ -n "$YES" ] && return 0
+	echo -n "$message "
+	read opt
+	case "$opt" in
+		y|Y) return 0;;
+		n|N) return 1;;
+		*) return $default;;
+	esac
+}
+
+convert_hex() {
+	hexdump -e '/1 "%02x "'
+}
+
+gen_mac() {
+	dd if=/dev/urandom bs=6 count=1 2>/dev/null
+}
+
+mac="$(mtd_get_mac_binary $partname $offset)"
+case "$mac" in
+	00:00:00:00:00:00);;
+	ff:ff:ff:ff:ff:ff);;
+	*)
+		echo "Current MAC address: $mac"
+		ask_bool "Overwrite (y/N)?" 0 || exit
+	;;
+esac
+
+if [ -n "$NEW_MAC" ]; then
+	set -- $(echo "$NEW_MAC" | sed 's,:, ,g')
+else
+	set -- $(gen_mac | convert_hex)
+	set -- $(printf %02x $(( (0x$1 & 0xfe) | 0x02 ))) $2 $3 $4 $5 $6
+fi
+echo "New MAC address: $1:$2:$3:$4:$5:$6"
+ask_bool "Write to EEPROM (y/N)?" || exit
+
+part=$(find_mtd_part "$partname")
+[ -n "$part" ] || exit
+echo -ne "\x$1\x$2\x$3\x$4\x$5\x$6" | dd of=$part conv=notrunc bs=1 count=6 seek=$offset 2>/dev/null
+echo "Done"