Most if ITEAD products have open source firmware. This camera was interesting to me for that reason only as it is easier to work with existing working firmware than to make a camera from scratch (already working on "from scratch" version based on rpi + 8MP camera, but this looks more affordable solution and is already packed in nice box and..)
Is there a firmware source available for this camera?
Sorry, we did not provide such firmware source to public.
Addtional, such firmware resource is not totally fit with your case.