kbingham · May 15, 2018 08:18 · Gladsonba · Feb 26, 2021 · harsh04102002 · Jun 10, 2023
diff --git a/uvc-gadget.sh b/uvc-gadget.sh
 #!/bin/sh

 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 ../../../
 	echo 2048 > 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
        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.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
	#!/bin/sh

	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 ../../../
	echo 2048 > 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
	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.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