Initial commit

meta-ampere/meta-common/recipes-ampere/network/ampere-usbnet.bb

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+SUMMARY = "Enable USB ethernet"
+PR = "r1"
+LICENSE = "Apache-2.0"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/Apache-2.0;md5=89aea4e17d99a7cacdbeed46a0096b10"
+
+DEPENDS += "systemd"
+RDEPENDS:${PN} += "libsystemd bash"
+
+inherit allarch systemd
+
+SRC_URI += "file://ampere-usbnet.service \
+            file://ampere_usbnet.sh \
+            file://00-bmc-usb0.network"
+
+do_install() {
+    install -d ${D}${systemd_unitdir}/system/
+    install -m 0644 ${WORKDIR}/ampere-usbnet.service ${D}${systemd_unitdir}/system
+
+    install -d ${D}${sysconfdir_native}/systemd/network/
+    install -m 0644 ${WORKDIR}/00-bmc-usb0.network ${D}${sysconfdir_native}/systemd/network
+
+    install -d ${D}/${sbindir}
+    install -m 755 ${WORKDIR}/ampere_usbnet.sh ${D}/${sbindir}
+}
+
+NATIVE_SYSTEMD_SUPPORT = "1"
+SYSTEMD_PACKAGES = "${PN}"
+SYSTEMD_SERVICE:${PN} = "ampere-usbnet.service"

meta-ampere/meta-common/recipes-ampere/network/ampere-usbnet/00-bmc-usb0.network

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+[Match]
+Name=usb0
+[Address]
+Address=192.168.0.10/16
+[Network]
+LinkLocalAddressing=no
+IPv6AcceptRA=no
+DHCP=no

meta-ampere/meta-common/recipes-ampere/network/ampere-usbnet/ampere-usbnet.service

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+[Unit]
+Description=Ampere Ethernet over USB gadget device
+After=phosphor-ipmi-host.service
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/sbin/ampere_usbnet.sh
+ExecStop=/usr/bin/usb-ctrl ecm usbnet off
+
+[Install]
+WantedBy=multi-user.target

meta-ampere/meta-common/recipes-ampere/network/ampere-usbnet/ampere_usbnet.sh

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+#!/bin/bash
+
+ENV_MAC_ADDR=$(fw_printenv bmc_macaddr)
+
+MAC_ADDR=$(echo "$ENV_MAC_ADDR" | cut -d "=" -f 2)
+
+if [ -n "$MAC_ADDR" ]; then
+	# Generate MAC Address from eth1addr using locally administered MAC
+	# https://en.wikipedia.org/wiki/MAC_address#Universal_vs._local_(U/L_bit
+	SUBMAC=$(echo "$MAC_ADDR" | cut -d ":" -f 2-6)
+	/usr/bin/usb-ctrl ecm usbnet on "06:$SUBMAC" "02:$SUBMAC"
+else
+	/usr/bin/usb-ctrl ecm usbnet on
+fi
+
+# Use NCM (Ethernet) Gadget instead of FunctionFS Gadget
+echo 0x0103 > /sys/kernel/config/usb_gadget/usbnet/idProduct
+echo "OpenBMC usbnet Device" > /sys/kernel/config/usb_gadget/usbnet/strings/0x409/product