From 1a9ed116c84118c2d705838795cc410340e8ef11 Mon Sep 17 00:00:00 2001
From: George Hung <george.hung@quantatw.com>
Date: Mon, 13 Jul 2020 14:12:03 +0800
Subject: meta-quanta: common: set locally administered bit to usb-network

We hope the MAC address of the usb-network is locally administered address,
so it needs to set locally administered bit (0x02) to the first octet of the
MAC address.

(From meta-quanta rev: ebe01d25bbb5b139feb7c9b089f322e45a28a68e)

Signed-off-by: George Hung <george.hung@quantatw.com>
Change-Id: I9bd0702359479514b385daf447a9747fd270e351
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
---
 .../network/usb-network/usb-network.sh             | 36 +++++++++++++++++++---
 1 file changed, 32 insertions(+), 4 deletions(-)

(limited to 'meta-quanta')

diff --git a/meta-quanta/meta-common/recipes-quanta/network/usb-network/usb-network.sh b/meta-quanta/meta-common/recipes-quanta/network/usb-network/usb-network.sh
index 444d4aee7..6840f9ffc 100644
--- a/meta-quanta/meta-common/recipes-quanta/network/usb-network/usb-network.sh
+++ b/meta-quanta/meta-common/recipes-quanta/network/usb-network/usb-network.sh
@@ -1,5 +1,25 @@
 #!/bin/bash
 
+mac_config="/usr/share/mac-address/config.txt"
+dev_mac_path="/tmp/usb0_dev"
+host_mac_path="/tmp/usb0_host"
+
+check_usb_local_administered() {
+    is_enable="$(cat ${mac_config} | grep 'USBLAA')"
+    echo ${is_enable}
+}
+
+# Set the locally administered bit (the second least-significant
+# bit of the first octet) of the MAC address
+set_local_administered_bit() {
+    mac="$(cat $1)"
+    first_byte="${mac:0:2}"
+    first_byte="$((0x$first_byte|2))"
+    first_byte="$(printf "%02x\n" "$first_byte")"
+    mac="${first_byte}${mac:2}"
+    echo $mac
+}
+
 cd /sys/kernel/config/usb_gadget
 
 if [ ! -f "g1" ]; then
@@ -17,16 +37,24 @@ if [ ! -f "g1" ]; then
     mkdir -p configs/c.1/strings/0x409
     echo "ECM" > configs/c.1/strings/0x409/configuration
 
+
+    if [[ $(check_usb_local_administered) == "USBLAA=true" ]]; then
+        dev_mac="$(set_local_administered_bit $dev_mac_path)"
+        host_mac="$(set_local_administered_bit $host_mac_path)"
+        echo $dev_mac > $dev_mac_path
+        echo $host_mac > $host_mac_path
+    fi
+
     mkdir -p functions/ecm.usb0
-    cat /tmp/usb0_dev > functions/ecm.usb0/dev_addr # write device mac address
-    cat /tmp/usb0_host > functions/ecm.usb0/host_addr # write usb mac address
+    cat $dev_mac_path > functions/ecm.usb0/dev_addr # write device mac address
+    cat $host_mac_path > functions/ecm.usb0/host_addr # write usb mac address
 
     ln -s functions/ecm.usb0 configs/c.1
 
     echo "$UDC" > UDC
 
-    rm /tmp/usb0_dev
-    rm /tmp/usb0_host
+    rm $dev_mac_path
+    rm $host_mac_path
 
 fi
 
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