From 6a27ebe6eb7abe187d6043eb4ac8827e9f12c8a4 Mon Sep 17 00:00:00 2001 From: Dobrica Pavlinusic Date: Sat, 29 Jun 2019 11:02:28 +0200 Subject: [PATCH] https://gist.github.com/kbingham/c39c4cc7c20882a104c08df5206e2f9f --- uvc-gadget.sh | 227 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 227 insertions(+) create mode 100644 uvc-gadget.sh diff --git a/uvc-gadget.sh b/uvc-gadget.sh new file mode 100644 index 0000000..4b8a4f1 --- /dev/null +++ b/uvc-gadget.sh @@ -0,0 +1,227 @@ +#!/bin/sh + +# https://gist.github.com/kbingham/c39c4cc7c20882a104c08df5206e2f9f + +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 + # 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 + # 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 + # create_uvc config/c.1 uvc.0 + CONFIG=$1 + FUNCTION=$2 + + echo " Creating UVC gadget functionality : $FUNCTION" + mkdir functions/$FUNCTION + mkdir -p functions/$FUNCTION/streaming/uncompressed/u/360p + cat < functions/$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 + # 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 -- 2.20.1