= Linux kernel documentation =
 * [http://lxr.linux.no/#linux/Documentation/usb/: Documentation/usb]
 * [http://lwn.net/Kernel/LDD3/:Linux Device Drivers] - Read Chapter 13 on USB

= USB intro =
 * [http://www.beyondlogic.org/usbnutshell/usb1.shtml: USB in a nutshell] - A somewhat dated, but short overview of the USB 2.0 specification
 * [http://www.usb.org/developers/docs/: USB specifications] - official bus and device class specifications from the USB-IF
 * [http://www.intel.com/content/www/us/en/io/universal-serial-bus/extensible-host-controler-interface-usb-xhci.html: xHCI specification] - eXtensible Host Controller Interface (xHCI) specification (email xhcisupport@intel.com for the latest spec)

= Talks on USB =
 * "Superspeed Me: USB 3.0 for Linux" - [http://mirror.linux.org.au/linux.conf.au/2010/friday/50230.ogv: video] (2010)
 * "USB port power off Kernel/Userspace API" - [http://linuxplumbers.ubicast.tv/videos/usb-port-power-off-kerneluserspace-api/: video], [http://dl.dropbox.com/u/96820575/sarah-sharp-lpt-port-power-off2-mini.pdf: slides] (2012)
 * "Vampire Mice: How USB Power Management impacts you" - [http://mirror.linux.org.au/linux.conf.au/2013/ogv/Vampire_Mice_How_USB_PM_impacts_you.ogv: video], [http://www.slideshare.net/saharabeara/sarah-sharpvampiremice201301: slides] (2013)