Native USB host (OTG) communication

Hi, all!

I have an Arduino Due which is have a Native USB port.I tested the usb host mod with mouse and keyboard.Both of them are worked.But i want to use my gamepad (Genius Maxfire Grandias 12).How can i do that?The main problem is i dont know that is the arduino give power to it?Because there is a led button on the gamepad which show it but my experience is that this button is only light up when i plug it for example to my computer when the windows detect the driver..

So first question is: "How can i figuring out that the gamepad get power?" And: "If it do, how can i communicate with it?"