add documentation and infrastructure for ADB and RNDIS over USB

README.md

@@ -98,6 +98,16 @@ exec awesome
 Since the MSMFB_SW_REFRESHER does not seem to be working i wrote this instead.
 Just compile and put in you ~/ or whereever so xinit can run it.
 
+## Enabling ADB and RNDIS (reverse USB tethering)
+1: Create this link for ADB to be able to find the shell, etc.
+  ln -s / /system
+  
+2: Add the included systemd-tmpfiles config files. They go in /etc/tmpfiles.d, and require a reboot to apply them.
+
+ADB shell works, but you will need to set the size ($COLUMNS and $LINES) and terminal type ($TERM) manually. 
+
+To use RNDIS, plug the Nexus into a computer and bridge the virtual ethernet adapter with your local network. Then, bring up the link and get an address as usual. The interface name should be 'usb0'.
+
 # Kernel stuff
 
 You can use the kernel from here https://github.com/crondog/kernel_msm
@@ -152,6 +162,9 @@ CONFIG_SECURITY_SELINUX_BOOTPARAM=y
 
 # Whats Working
 Wifi
+ADB
+USB Reverse Tethering/RNDIS (guest)
+USB OTG (host)
 fb0
 Audio -- Need to setup Pulse Audio as systemwide. Not sure why it does not work as a normal user
 You will also need the alsaucm files from libasound2-data_1.0.27.2-1ubuntu6_all.deb

system/adbd.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=ADB Daemon
+After=systemd-tmpfiles-setup.service
+
+[Service]
+Type=simple
+ExecStart=/bin/bash -c '/sbin/adbd 2> /var/log/adbd.err 1> /var/log/adbd.out'
+
+[Install]
+WantedBy=basic.target
+Before=network.service

tmpfiles.d/adbd.conf

@@ -0,0 +1,3 @@
+w /sys/class/android_usb/android0/functions	- - - - 	adb,rndis
+w /sys/class/android_usb/android0/enable	- - - - 	1
+