android-tools-conf-configfs: add an alternative to anrdoid-tools-conf

The package android-tools-conf depends on presence of
/sys/class/android_usb, which is not present in default (mainline)
kernels. Add a set of scripts that will use ConfigFS to configure USB
gadget rather than using non-standard device class.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-devtools/android-tools/android-tools-conf-configfs/10-adbd-configfs.conf

@@ -0,0 +1,4 @@
+[Service]
+ExecStartPre=/usr/bin/android-gadget-setup
+ExecStartPost=/usr/bin/android-gadget-start
+ExecStopPost=/usr/bin/android-gadget-cleanup

meta-oe/recipes-devtools/android-tools/android-tools-conf-configfs/android-gadget-cleanup

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+[ -d /sys/kernel/config/usb_gadget ] || exit 0
+
+cd /sys/kernel/config/usb_gadget
+
+cd adb
+
+echo "" > UDC || true
+
+killall adbd || true
+
+umount /dev/usb-ffs/adb
+
+rm configs/c.1/ffs.usb0
+
+rmdir configs/c.1/strings/0x409
+rmdir configs/c.1
+
+rmdir functions/ffs.usb0
+rmdir strings/0x409
+
+cd ..
+rmdir adb

meta-oe/recipes-devtools/android-tools/android-tools-conf-configfs/android-gadget-setup

@@ -0,0 +1,35 @@
+#!/bin/sh
+
+set -e
+
+manufacturer=RPB
+model="Android device"
+serial=0123456789ABCDEF
+
+if [ -r /etc/android-gadget-setup.machine ] ; then
+	. /etc/android-gadget-setup.machine
+fi
+
+[ -d /sys/kernel/config/usb_gadget ] || modprobe libcomposite
+
+cd /sys/kernel/config/usb_gadget
+
+[ -d adb ] && /usr/bin/android-gadget-cleanup || true
+
+mkdir adb
+cd adb
+
+mkdir configs/c.1
+mkdir functions/ffs.usb0
+mkdir strings/0x409
+mkdir configs/c.1/strings/0x409
+echo 0x18d1 > idVendor
+echo 0xd002 > idProduct
+echo "$serial" > strings/0x409/serialnumber
+echo "$manufacturer" > strings/0x409/manufacturer
+echo "$model" > strings/0x409/product
+echo "Conf 1" > configs/c.1/strings/0x409/configuration
+ln -s functions/ffs.usb0 configs/c.1
+
+mkdir -p /dev/usb-ffs/adb
+mount -t functionfs usb0 /dev/usb-ffs/adb

meta-oe/recipes-devtools/android-tools/android-tools-conf-configfs/android-gadget-start

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+set -e
+
+sleep 3
+
+ls /sys/class/udc/ > /sys/kernel/config/usb_gadget/adb/UDC

meta-oe/recipes-devtools/android-tools/android-tools-conf-configfs_1.0.bb

@@ -0,0 +1,35 @@
+DESCRIPTION = "Different utilities from Android - corressponding configuration files for using ConfigFS"
+SECTION = "console/utils"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
+
+SRC_URI = " \
+    file://android-gadget-setup \
+    file://android-gadget-start \
+    file://android-gadget-cleanup \
+    file://10-adbd-configfs.conf \
+"
+
+PACKAGE_ARCH = "${MACHINE_ARCH}"
+
+do_install() {
+    install -d ${D}${bindir}
+    install -m 0755 ${WORKDIR}/android-gadget-setup ${D}${bindir}
+    install -m 0755 ${WORKDIR}/android-gadget-start ${D}${bindir}
+    install -m 0755 ${WORKDIR}/android-gadget-cleanup ${D}${bindir}
+
+    if [ -r ${WORKDIR}/android-gadget-setup.machine ] ; then
+	install -d ${D}${sysconfdir}
+	install -m 0644 ${WORKDIR}/android-gadget-setup.machine ${D}${sysconfdir}
+    fi
+
+    install -d ${D}${systemd_unitdir}/system/android-tools-adbd.service.d
+    install -m 0644 ${WORKDIR}/10-adbd-configfs.conf ${D}${systemd_unitdir}/system/android-tools-adbd.service.d
+}
+
+FILES_${PN} += " \
+    ${systemd_unitdir}/system/ \
+"
+
+PROVIDES += "android-tools-conf"
+RPROVIDES_${PN} = "android-tools-conf"