After a week of thoughts and assumptions I finally succeeded getting some sort of image from v4l interface of my MOTOROLA MING A1200. The image below is a pbm’ized CAMERA_IMAGE_FORMAT_RAW8. As I have no experience with the digital cameras internals the decoding may take a while.
In case you wonder what’s the thing on the image: It is the top part of Nokia 6021 on a white background :). There is MOTOVISION application from Chineese dev’s that can capture the camera output. The only thing that it looks like it displays the video fullscreen and then reads framebuffer device. I don’t like this approach. The source for drivers is available from Motorola so there are chances that my “caming” app will be usable shortly (and Open Source, of course :) ).