scripts: Provide a multi-function config script

Just a development starter for now.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 231 insertions, 0 deletions

diff --git a/scripts/uvc-gadget.sh b/scripts/uvc-gadget.sh
new file mode 100755
index 0000000..46cc384
--- /dev/null
+++ b/scripts/uvc-gadget.sh
@@ -0,0 +1,231 @@
+#!/bin/sh
+# SPDX-License-Identifier: MIT
+
+set -e
+#set -x
+
+CONFIGFS="/sys/kernel/config"
+GADGET="$CONFIGFS/usb_gadget"
+VID="0x0525"
+PID="0xa4a2"
+SERIAL="0123456789"
+MANUF=$(hostname)
+PRODUCT="UVC Gadget"
+
+USBFILE=/root/usbstorage.img
+
+BOARD=$(strings /proc/device-tree/model)
+
+case $BOARD in
+	"Renesas Salvator-X board based on r8a7795 ES1.x")
+		UDC_USB2=e6590000.usb
+		UDC_USB3=ee020000.usb
+
+		UDC_ROLE2=/sys/devices/platform/soc/ee080200.usb-phy/role
+		UDC_ROLE2=/dev/null #Not needed - always peripheral
+		UDC_ROLE3=/sys/devices/platform/soc/ee020000.usb/role
+
+		UDC=$UDC_USB2
+		UDC_ROLE=$UDC_ROLE2
+		;;
+
+	"TI OMAP4 PandaBoard-ES")
+		UDC=`ls /sys/class/udc` # Should be musb-hdrc.0.auto
+		UDC_ROLE=/dev/null # Not needed - peripheral enabled
+		;;
+
+	*)
+		UDC=`ls /sys/class/udc` # will identify the 'first' UDC
+		UDC_ROLE=/dev/null # Not generic
+		;;
+esac
+
+echo "Detecting platform:"
+echo "  board : $BOARD"
+echo "  udc   : $UDC"
+
+create_msd() {
+	# Example usage:
+	#	create_msd <target config> <function name> <image file>
+	#	create_msd configs/c.1 mass_storage.0 /root/backing.img
+	CONFIG=$1
+	FUNCTION=$2
+	BACKING_STORE=$3
+
+	if [ ! -f $BACKING_STORE ]
+	then
+		echo "\tCreating backing file"
+		dd if=/dev/zero of=$BACKING_STORE bs=1M count=32 > /dev/null 2>&1
+		mkfs.ext4 $USBFILE > /dev/null 2>&1
+		echo "\tOK"
+	fi
+
+	echo "\tCreating MSD gadget functionality"
+	mkdir functions/$FUNCTION
+	echo 1 > functions/$FUNCTION/stall
+	echo $BACKING_STORE > functions/$FUNCTION/lun.0/file
+	echo 1 > functions/$FUNCTION/lun.0/removable
+	echo 0 > functions/$FUNCTION/lun.0/cdrom
+
+	ln -s functions/$FUNCTION configs/c.1
+
+	echo "\tOK"
+}
+
+delete_msd() {
+	# Example usage:
+	#	delete_msd <target config> <function name>
+	#	delete_msd config/c.1 uvc.0
+	CONFIG=$1
+	FUNCTION=$2
+
+	echo "Removing Mass Storage interface : $FUNCTION"
+	rm -f $CONFIG/$FUNCTION
+	rmdir functions/$FUNCTION
+	echo "OK"
+}
+
+create_uvc() {
+	# Example usage:
+	#	create_uvc <target config> <function name>
+	#	create_uvc config/c.1 uvc.0
+	CONFIG=$1
+	FUNCTION=$2
+
+	echo "	Creating UVC gadget functionality : $FUNCTION"
+	mkdir functions/$FUNCTION
+	mkdir -p functions/$FUNCTION/streaming/uncompressed/u/360p
+	cat <<EOF > functions/$FUNCTION/streaming/uncompressed/u/360p/dwFrameInterval
+666666
+1000000
+5000000
+EOF
+	mkdir functions/$FUNCTION/streaming/header/h
+	cd functions/$FUNCTION/streaming/header/h
+	ln -s ../../uncompressed/u
+	cd ../../class/fs
+	ln -s ../../header/h
+	cd ../../class/hs
+	ln -s ../../header/h
+	cd ../../../control
+	mkdir header/h
+	ln -s header/h class/fs
+	ln -s header/h class/ss
+	cd ../../../
+
+	# Set the packet size: uvc gadget max size is 3k...
+	echo 3072 > functions/$FUNCTION/streaming_maxpacket
+	echo 2048 > functions/$FUNCTION/streaming_maxpacket
+	echo 1024 > functions/$FUNCTION/streaming_maxpacket
+
+	ln -s functions/$FUNCTION configs/c.1
+}
+
+delete_uvc() {
+	# Example usage:
+	#	delete_uvc <target config> <function name>
+	#	delete_uvc config/c.1 uvc.0
+	CONFIG=$1
+	FUNCTION=$2
+
+	echo "	Deleting UVC gadget functionality : $FUNCTION"
+	rm $CONFIG/$FUNCTION
+
+	rm functions/$FUNCTION/control/class/*/h
+	rm functions/$FUNCTION/streaming/class/*/h
+	rm functions/$FUNCTION/streaming/header/h/u
+	rmdir functions/$FUNCTION/streaming/uncompressed/u/360p
+	rmdir functions/$FUNCTION/streaming/uncompressed/u
+	rmdir functions/$FUNCTION/streaming/header/h
+	rmdir functions/$FUNCTION/control/header/h
+	rmdir functions/$FUNCTION
+}
+
+case "$1" in
+    start)
+	echo "Creating the USB gadget"
+	#echo "Loading composite module"
+	#modprobe libcomposite
+
+	echo "Creating gadget directory g1"
+	mkdir -p $GADGET/g1
+
+	cd $GADGET/g1
+	if [ $? -ne 0 ]; then
+	    echo "Error creating usb gadget in configfs"
+	    exit 1;
+	else
+	    echo "OK"
+	fi
+
+	echo "Setting Vendor and Product ID's"
+	echo $VID > idVendor
+	echo $PID > idProduct
+	echo "OK"
+
+	echo "Setting English strings"
+	mkdir -p strings/0x409
+	echo $SERIAL > strings/0x409/serialnumber
+	echo $MANUF > strings/0x409/manufacturer
+	echo $PRODUCT > strings/0x409/product
+	echo "OK"
+
+	echo "Creating Config"
+	mkdir configs/c.1
+	mkdir configs/c.1/strings/0x409
+
+	echo "Creating functions..."
+	#create_msd configs/c.1 mass_storage.0 $USBFILE
+	create_uvc configs/c.1 uvc.0
+	#create_uvc configs/c.1 uvc.1
+	echo "OK"
+
+	echo "Binding USB Device Controller"
+	echo $UDC > UDC
+	echo peripheral > $UDC_ROLE
+	cat $UDC_ROLE
+	echo "OK"
+	;;
+
+    stop)
+	echo "Stopping the USB gadget"
+
+	set +e # Ignore all errors here on a best effort
+
+	cd $GADGET/g1
+
+	if [ $? -ne 0 ]; then
+	    echo "Error: no configfs gadget found"
+	    exit 1;
+	fi
+
+	echo "Unbinding USB Device Controller"
+	grep $UDC UDC && echo "" > UDC
+	echo "OK"
+
+	#delete_uvc configs/c.1 uvc.1
+	delete_uvc configs/c.1 uvc.0
+	#delete_msd configs/c.1 mass_storage.0
+
+	echo "Clearing English strings"
+	rmdir strings/0x409
+	echo "OK"
+
+	echo "Cleaning up configuration"
+	rmdir configs/c.1/strings/0x409
+	rmdir configs/c.1
+	echo "OK"
+
+	echo "Removing gadget directory"
+	cd $GADGET
+	rmdir g1
+	cd /
+	echo "OK"
+
+	#echo "Disable composite USB gadgets"
+	#modprobe -r libcomposite
+	#echo "OK"
+	;;
+    *)
+	echo "Usage : $0 {start|stop}"
+esac