Hi, everybody. I got a pc touchscreen with Ricoh chipset r5u870 on board.
I installed r5u87x and all seemed to work. The r5u87x-loader found the camera, etc..
But with all the applications I used (Ekiga, Motion, Cheese) the only one good resolution is 640x480. The other resolutions got big video problems (rows, snow, dots ..). The video is, also, rotated 180 (e.g. flip up-down), and the v4l2 utility (e.g. v4l2ucp) is not enable to flip the image.
The driver r5u87x seems to not support negotiation with the firmware.