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

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