74 lines
1.7 KiB
Text
74 lines
1.7 KiB
Text
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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2018-present Team LibreELEC (https://libreelec.tv)
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COMPATIBLE=$(/usr/bin/dtsoc)
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MAC_STEP=""
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validate_mac() {
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[ ${#MAC} -eq 12 -a "${MAC}" != "000000000000" ]
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}
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fixup_self_mac() {
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# clear multicast bit and set local assignment bit (IEEE802)
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MAC=$(printf '%012X' "$(( (0x$MAC & 0xFEFFFFFFFFFF) | 0x020000000000 ))")
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}
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from_cmdline() {
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for arg in $(cat /proc/cmdline | tr -d ':'); do
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case ${arg} in
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mac=*)
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MAC=${arg#*=}
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;;
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esac
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done
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}
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aml_from_efuse_gxbb() {
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if [ -e /sys/devices/platform/efuse/efuse0/nvmem ] ; then
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MAC=$(od -x -A n -j 0x34 -N 6 /sys/bus/nvmem/devices/efuse0/nvmem | tr -d ' ')
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MAC=${MAC:2:2}${MAC:0:2}${MAC:6:2}${MAC:4:2}${MAC:10:2}${MAC:8:2}
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fi
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}
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aml_from_efuse_gxl() {
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if [ -e /sys/devices/platform/efuse/efuse0/nvmem ] ; then
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MAC=$(cat /sys/devices/platform/efuse/efuse0/nvmem)
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fi
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}
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aml_from_cpu_sn() {
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if [ -e /sys/bus/platform/devices/firmware\:secure-monitor/serial ] ; then
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MAC=$(cat /sys/bus/platform/devices/firmware\:secure-monitor/serial 2>/dev/null | cut -b-12)
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fixup_self_mac
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fi
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}
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from_cpu_sn() {
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MAC=$(cat /proc/cpuinfo 2>/dev/null | awk '/Serial/ {print substr($3,1,12)}')
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fixup_self_mac
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}
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case $COMPATIBLE in
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amlogic*)
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MAC_STEPS="from_cmdline aml_from_efuse_gxbb aml_from_efuse_gxl aml_from_cpu_sn"
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;;
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*)
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MAC_STEPS="from_cpu_sn"
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;;
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esac
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for MAC_STEP in $MAC_STEPS ; do
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$MAC_STEP
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validate_mac && break
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done
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if validate_mac ; then
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MAC=$(echo "$MAC" | sed 's/\(..\)/\1:/g' | cut -b-17)
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echo "MAC=${MAC}" > /run/libreelec/ethmactool-$1
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/usr/sbin/ip link set dev $1 down
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/usr/sbin/ip link set dev $1 address $MAC
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/usr/sbin/ip link set dev $1 up
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fi
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