git.rot13.org Git - linux-usb-otg/blob - uvc-gadget.sh

   1 #!/bin/sh
   2
   3 # https://gist.github.com/kbingham/c39c4cc7c20882a104c08df5206e2f9f
   4 # needs user-space part https://github.com/wlhe/uvc-gadget
   5
   6 if [ ! -d uvc-gadget ] ; then
   7         git clone https://github.com/wlhe/uvc-gadget
   8         cd uvc-gadget && make
   9         cd -
  10 fi
  11
  12
  13 # load module
  14 cd /sys/kernel/config/usb_gadget/ || modprobe libcomposite
  15
  16 set -e
  17 #set -x
  18
  19 CONFIGFS="/sys/kernel/config"
  20 GADGET="$CONFIGFS/usb_gadget"
  21 VID="0x0525"
  22 PID="0xa4a2"
  23 SERIAL="0123456789"
  24 MANUF=$(hostname)
  25 PRODUCT="UVC Gadget"
  26
  27 USBFILE=/root/usbstorage.img
  28
  29 BOARD=$(strings /proc/device-tree/model)
  30
  31 case $BOARD in
  32         "Renesas Salvator-X board based on r8a7795 ES1.x")
  33                 UDC_USB2=e6590000.usb
  34                 UDC_USB3=ee020000.usb
  35
  36                 UDC_ROLE2=/sys/devices/platform/soc/ee080200.usb-phy/role
  37                 UDC_ROLE2=/dev/null #Not needed - always peripheral
  38                 UDC_ROLE3=/sys/devices/platform/soc/ee020000.usb/role
  39
  40                 UDC=$UDC_USB2
  41                 UDC_ROLE=$UDC_ROLE2
  42                 ;;
  43
  44         "TI OMAP4 PandaBoard-ES")
  45                 UDC=`ls /sys/class/udc` # Should be musb-hdrc.0.auto
  46                 UDC_ROLE=/dev/null # Not needed - peripheral enabled
  47                 ;;
  48
  49         *)
  50                 UDC=`ls /sys/class/udc` # will identify the 'first' UDC
  51                 UDC_ROLE=/dev/null # Not generic
  52                 ;;
  53 esac
  54
  55 echo "Detecting platform:"
  56 echo "  board : $BOARD"
  57 echo "  udc   : $UDC"
  58
  59 create_msd() {
  60         # Example usage:
  61         #       create_msd <target config> <function name> <image file>
  62         #       create_msd configs/c.1 mass_storage.0 /root/backing.img
  63         CONFIG=$1
  64         FUNCTION=$2
  65         BACKING_STORE=$3
  66
  67         if [ ! -f $BACKING_STORE ]
  68         then
  69                 echo "\tCreating backing file"
  70                 dd if=/dev/zero of=$BACKING_STORE bs=1M count=32 > /dev/null 2>&1
  71                 mkfs.ext4 $USBFILE > /dev/null 2>&1
  72                 echo "\tOK"
  73         fi
  74
  75         echo "\tCreating MSD gadget functionality"
  76         mkdir functions/$FUNCTION
  77         echo 1 > functions/$FUNCTION/stall
  78         echo $BACKING_STORE > functions/$FUNCTION/lun.0/file
  79         echo 1 > functions/$FUNCTION/lun.0/removable
  80         echo 0 > functions/$FUNCTION/lun.0/cdrom
  81
  82         ln -s functions/$FUNCTION configs/c.1
  83
  84         echo "\tOK"
  85 }
  86
  87 delete_msd() {
  88         # Example usage:
  89         #       delete_msd <target config> <function name>
  90         #       delete_msd config/c.1 uvc.0
  91         CONFIG=$1
  92         FUNCTION=$2
  93
  94         echo "Removing Mass Storage interface : $FUNCTION"
  95         rm -f $CONFIG/$FUNCTION
  96         rmdir functions/$FUNCTION
  97         echo "OK"
  98 }
  99
 100 create_uvc() {
 101         # Example usage:
 102         #       create_uvc <target config> <function name>
 103         #       create_uvc config/c.1 uvc.0
 104         CONFIG=$1
 105         FUNCTION=$2
 106
 107         echo "  Creating UVC gadget functionality : $FUNCTION"
 108         mkdir functions/$FUNCTION
 109         mkdir -p functions/$FUNCTION/streaming/uncompressed/u/360p
 110         cat <<EOF > functions/$FUNCTION/streaming/uncompressed/u/360p/dwFrameInterval
 111 666666
 112 1000000
 113 5000000
 114 EOF
 115         mkdir functions/$FUNCTION/streaming/header/h
 116         cd functions/$FUNCTION/streaming/header/h
 117         ln -s ../../uncompressed/u
 118         cd ../../class/fs
 119         ln -s ../../header/h
 120         cd ../../class/hs
 121         ln -s ../../header/h
 122         cd ../../../control
 123         mkdir header/h
 124         ln -s header/h class/fs
 125         ln -s header/h class/ss
 126         cd ../../../
 127         echo 2048 > functions/$FUNCTION/streaming_maxpacket
 128
 129         ln -s functions/$FUNCTION configs/c.1
 130 }
 131
 132 delete_uvc() {
 133         # Example usage:
 134         #       delete_uvc <target config> <function name>
 135         #       delete_uvc config/c.1 uvc.0
 136         CONFIG=$1
 137         FUNCTION=$2
 138
 139         echo "  Deleting UVC gadget functionality : $FUNCTION"
 140         rm $CONFIG/$FUNCTION
 141
 142         rm functions/$FUNCTION/control/class/*/h
 143         rm functions/$FUNCTION/streaming/class/*/h
 144         rm functions/$FUNCTION/streaming/header/h/u
 145         rmdir functions/$FUNCTION/streaming/uncompressed/u/360p
 146         rmdir functions/$FUNCTION/streaming/uncompressed/u
 147         rmdir functions/$FUNCTION/streaming/header/h
 148         rmdir functions/$FUNCTION/control/header/h
 149         rmdir functions/$FUNCTION
 150 }
 151
 152 case "$1" in
 153     start)
 154         echo "Creating the USB gadget"
 155         #echo "Loading composite module"
 156         #modprobe libcomposite
 157
 158         echo "Creating gadget directory g1"
 159         mkdir -p $GADGET/g1
 160
 161         cd $GADGET/g1
 162         if [ $? -ne 0 ]; then
 163             echo "Error creating usb gadget in configfs"
 164             exit 1;
 165         else
 166             echo "OK"
 167         fi
 168
 169         echo "Setting Vendor and Product ID's"
 170         echo $VID > idVendor
 171         echo $PID > idProduct
 172         echo "OK"
 173
 174         echo "Setting English strings"
 175         mkdir -p strings/0x409
 176         echo $SERIAL > strings/0x409/serialnumber
 177         echo $MANUF > strings/0x409/manufacturer
 178         echo $PRODUCT > strings/0x409/product
 179         echo "OK"
 180
 181         echo "Creating Config"
 182         mkdir configs/c.1
 183         mkdir configs/c.1/strings/0x409
 184
 185         echo "Creating functions..."
 186         #create_msd configs/c.1 mass_storage.0 $USBFILE
 187         create_uvc configs/c.1 uvc.0
 188         echo "OK"
 189
 190
 191         echo "Binding USB Device Controller"
 192         echo $UDC > UDC
 193         echo peripheral > $UDC_ROLE
 194         cat $UDC_ROLE
 195         echo "OK"
 196         ;;
 197
 198     stop)
 199         echo "Stopping the USB gadget"
 200
 201         set +e # Ignore all errors here on a best effort
 202
 203         cd $GADGET/g1
 204
 205         if [ $? -ne 0 ]; then
 206             echo "Error: no configfs gadget found"
 207             exit 1;
 208         fi
 209
 210         echo "Unbinding USB Device Controller"
 211         grep $UDC UDC && echo "" > UDC
 212         echo "OK"
 213
 214         delete_uvc configs/c.1 uvc.0
 215         #delete_msd configs/c.1 mass_storage.0
 216
 217         echo "Clearing English strings"
 218         rmdir strings/0x409
 219         echo "OK"
 220
 221         echo "Cleaning up configuration"
 222         rmdir configs/c.1/strings/0x409
 223         rmdir configs/c.1
 224         echo "OK"
 225
 226         echo "Removing gadget directory"
 227         cd $GADGET
 228         rmdir g1
 229         cd /
 230         echo "OK"
 231
 232         #echo "Disable composite USB gadgets"
 233         #modprobe -r libcomposite
 234         #echo "OK"
 235         ;;
 236     *)
 237         echo "Usage : $0 {start|stop}"
 238 esac