Enable / Disable support for USB Gadget (allows background updates)

File correctly placed for installation
Mwyann · Feb 10, 2019 · 69ed6fb · 69ed6fb
1 parent f60e1bf
commit 69ed6fb
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Showing 6 changed files with 83 additions and 26 deletions.
diff --git a/install_usbgadget.sh b/install_usbgadget.sh
@@ -13,9 +13,13 @@ fi
 echo "Installing USB gadget script..."
 # Installing as a system service to enable it on boot
 mkdir /usr/lib/systemd/system
-cp resources/myusbgadget /usr/local/bin/myusbgadget
-cp resources/myusbgadget /usr/local/bin/bridge_enable.sh
+cp resources/myusbgadget /usr/local/bin/
+cp resources/usbgadget_enable.sh /usr/local/bin/
+cp resources/usbgadget_disable.sh /usr/local/bin/
+cp resources/bridge_enable.sh /usr/local/bin/
 chmod +x /usr/local/bin/myusbgadget
+chmod +x /usr/local/bin/usbgadget_enable.sh
+chmod +x /usr/local/bin/usbgadget_disable.sh
 chmod +x /usr/local/bin/bridge_enable.sh
 cp resources/myusbgadget.service /usr/lib/systemd/system/
 systemctl enable myusbgadget

diff --git a/bridge_enable.sh → resources/bridge_enable.sh b/bridge_enable.sh → resources/bridge_enable.sh
@@ -6,5 +6,5 @@ iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE
 iptables -A FORWARD -i wlan0 -o usb0 -m state --state RELATED,ESTABLISHED -j ACCEPT
 iptables -A FORWARD -i usb0 -o wlan0 -j ACCEPT
 
-#sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"
+sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"
 
diff --git a/resources/myusbgadget b/resources/myusbgadget
@@ -5,39 +5,64 @@
 # https://www.kernel.org/doc/Documentation/usb/gadget_configfs.txt
 # https://www.kernel.org/doc/Documentation/ABI/testing/configfs-usb-gadget
 
+echo "Configuring USB Gadget..."
+
+#remount
 modprobe libcomposite
 
 cd /sys/kernel/config/usb_gadget/
 mkdir g && cd g
 
-echo 0x243a > idVendor  # Peugeot
-echo 0x0001 > idProduct # Connect Apps
-echo 0x0226 > bcdDevice # v2.26
-echo 0x0200 > bcdUSB    # USB 2.0
+if [ -f /media/xfer/.EEM ]; then
+  echo 0x243a > idVendor  # Peugeot
+  echo 0x0001 > idProduct # Connect Apps
+  echo 0x0226 > bcdDevice # v2.26
+  echo 0x0200 > bcdUSB    # USB 2.0
+
+  # Composite support for Windows
+  #echo 0xEF > bDeviceClass
+  #echo 0x02 > bDeviceSubClass
+  #echo 0x01 > bDeviceProtocol
 
-# Composite support for Windows
-#echo 0xEF > bDeviceClass
-#echo 0x02 > bDeviceSubClass
-#echo 0x01 > bDeviceProtocol
+  mkdir -p strings/0x409
+  echo "CAFEDECA"                  > strings/0x409/serialnumber
+  echo "Aperture Science"          > strings/0x409/manufacturer
+  echo "PSAKey"                    > strings/0x409/product
+else
+  echo 0x8564 > idVendor  # Transcend
+  echo 0x4000 > idProduct #
+  echo 0x0034 > bcdDevice # 0.34
+  echo 0x0200 > bcdUSB    # USB 2.0
 
-mkdir -p strings/0x409
-echo "CAFEDECA"                  > strings/0x409/serialnumber
-echo "Aperture Science"          > strings/0x409/manufacturer
-echo "PSAKey"                    > strings/0x409/product
+  mkdir -p strings/0x409
+  echo "000000000020"              > strings/0x409/serialnumber
+  echo "TS-RDF5"                   > strings/0x409/manufacturer
+  echo "Transcend"                 > strings/0x409/product
+fi
 
-#mkdir -p functions/mass_storage.usb0  # mass storage
-mkdir -p functions/eem.usb0  # network
+echo "Enabling MassStorage function..."
+mkdir -p functions/mass_storage.usb0  # mass storage
+if [ -f /media/xfer/.EEM ]; then
+  echo "Enabling EEM function..."
+  mkdir -p functions/eem.usb0  # network
+fi
 
 mkdir -p configs/c.1
 echo 500 > configs/c.1/MaxPower
-#ln -s functions/mass_storage.usb0 configs/c.1/
-ln -s functions/eem.usb0 configs/c.1/
+ln -s functions/mass_storage.usb0 configs/c.1/
+if [ -f /media/xfer/.EEM ]; then
+  ln -s functions/eem.usb0 configs/c.1/
+fi
 
 #echo /dev/mmcblk0p4 > /sys/kernel/config/usb_gadget/g/functions/mass_storage.usb0/lun.0/file
-#echo 1 > functions/mass_storage.usb0/lun.0/removable
+echo /dev/mmcblk0p3 > /sys/kernel/config/usb_gadget/g/functions/mass_storage.usb0/lun.0/file
+echo 1 > functions/mass_storage.usb0/lun.0/removable
 
 udevadm settle -t 5 || :
-ls /sys/class/udc/ > UDC
 
-# enables internet sharing
-/usr/local/bin/bridge_enable.sh
+if [ -f /media/xfer/.EEM ]; then
+  echo "Enabling Internet sharing..."
+  # enables internet sharing
+  /usr/local/bin/bridge_enable.sh
+fi
+
diff --git a/resources/myusbgadget.service b/resources/myusbgadget.service
@@ -1,12 +1,13 @@
 [Unit]
-Description=My USB gadget
-After=systemd-modules-load.service apache2.service
+Description=USB Gadget Service
+After=systemd-modules-load.service
 Before=networking.service
 
 [Service]
 Type=oneshot
 RemainAfterExit=yes
-ExecStart=/usr/local/bin/myusbgadget
+ExecStart=/usr/local/bin/usbgadget_enable.sh
+ExecStop=/usr/local/bin//usbgadget_disable.sh
 
 [Install]
 WantedBy=sysinit.target
diff --git a/resources/usbgadget_disable.sh b/resources/usbgadget_disable.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+if [ "$(whoami)" != "root" ]; then
+	echo "This script needs to be run as root. Please use sudo."
+	exit 1
+fi
+
+echo "Stopping USB Gadget..."
+
+echo "" > /sys/kernel/config/usb_gadget/g/UDC
+# sh -c "echo '' > /sys/kernel/config/usb_gadget/g/UDC"
diff --git a/resources/usbgadget_enable.sh b/resources/usbgadget_enable.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+if [ "$(whoami)" != "root" ]; then
+	echo "This script needs to be run as root. Please use sudo."
+	exit 1
+fi
+
+echo "Starting USB Gadget..."
+
+if [ ! -d "/sys/kernel/config/usb_gadget/g/configs/c.1" ]; then
+	# usb gadget not yet created
+	/usr/local/bin/myusbgadget
+fi
+
+ls /sys/class/udc/ > /sys/kernel/config/usb_gadget/g/UDC
+