I don't have any documents/drivers. At a recent project in Arizona i installed my first/only Amazon Fire TV box. I had done some IR control research myself assuming it would be IR but then the programmer handled it with IP control.

This article at CEPRO talks about a company that has a driver. [Link: cepro.com]

This is the companies page for Amazon Fire TV... Fusion Research [Link: fusionrd.com]

I would imagine that they aren't the only ones with a working driver at this point so you might be able to find something else.

This is a good thread about IR control. [Link: remotecentral.com]