[Gta04-owner] Camera docs

[Dr. H. Nikolaus Schaller]

Hi Andreas,

Am 29.12.2011 um 20:53 schrieb Dr. H. Nikolaus Schaller:

> Hi Andreas,
> 
> Am 29.12.2011 um 16:36 schrieb Andreas Kemnade:
> 
>> Hi,
>> 
>> As far as I understand there is no support yet for the optional camera module.
>> I would like to do some driver developement for it when I finally have my gta04.
> 
> That would be nice!
> 
> As far as I know the drivers are already available in the hw-validation
> kernel and I have added some preliminary entries to the board file but did not
> look into controlling everything. We may need 2 or 3 additional pins to be
> configured as GPIOs to reset and enable the camera. And of course switch on
> the 2.5V power.
> 
>> Does anybody have a lecture list for me so I have at least something to read?
> 
> This may be a good start to read (preliminary datasheet of the camera chip):
> 
> 	http://www.surveyor.com/blackfin/OV9655-datasheet.pdf
> 
> The data sheet of the camera module itself describes more the mechanical
> parts of the module and the pin layout of the FFC.

I have now added some patches from the Beagleboard camera
code and could make the camera partially work. It is switching
on the camera power and clocks, identifies the camera chip
through I2C2 and finally programs some default values.

But mplayer shows a green window and tells us about a
select timeout.

The camera emits sync signals and some data (verified by
oscilloscope) so it appears to work. But there may be some
bugs in register settings either on the camera or the OMAP
camera interface.

Details can be found here if you already want to dig into
the code (hardware is coming very soon!):

	http://projects.goldelico.com/p/gta04-kernel/issues/206/#ic864

Nikolaus