RESEARCH

bare metal USB driver for RPI with ARP example (current port)
https://github.com/rsta2/uspi
https://www.raspberrypi.org/forums/viewtopic.php?f=72&t=92579

https://github.com/xinu-os/xinu/tree/master/device/smsc9512

http://www.pebblebay.com/raspberry-pi-embedded/
The RPI1 has:
– A USB host controller driver for the Synopsys DesignWare USB 2.0 OTG
controller embedded in the processor
– A USB host stack with USB networking infrastructure
– A device driver for LAN9512/4 Ethernet controller
Might be similar to the RPI 2?

https://github.com/Chadderz121/csud

TCP/UDP/IP RTOS
http://www.nxp.com/files/microcontrollers/doc/app_note/AN3470.pdf

datasheet Synopsys DesignWare USB 2.0 OTG
http://www.quicklogic.com/assets/pdf/data-sheets/QL-Hi-Speed-USB-2.0-OTG-Controller-Data-Sheet.pdf#G1163015