Future direction of driver

[Jacob Nikom]

I think it could be useful to see how the drivers for other web cameras
are designed. For example for QuickCam, which has excellent Linux
support
pages:
ftp://ftp.cs.unm.edu/pub/chris/quickcam/
http://www.cs.virginia.edu/~patrick/quickcam/

(IMHO I think that cpia is rather strange name. I think the name should
reflect that it is a driver for WebCam II camera, not for something more
generic.)

Jacob Nikom

sbertin@mindspring.com wrote:
> 
> I'd like to see some discussion of what we want this driver to
> eventually look like.
> 
> Right now, I envision 3 modules:
> 
> cpia
>         High level driver that handles translation on v4l requests into
>         CPiA commands.  This is also the place to handle differences in
>         CPiA firmware versions.
> 
> cpia_pp
> cpia_usb
>         Low level drivers for interacting with the hardware.  Both PP
>         and USB cameras should be usable at the same time.
> 
> The interface between these modules could be modelled after the parport
> code, and use a variant of interface.h.
> 
> These modules would exist in 4 source code files:
> cpia.h  cpia.c  cpia_pp.c  cpia_usb.c
> 
> The parallel port module should handle nibble mode and operation without
> IRQs in addition to the full ECP ports.  This should take full
> advantage of the parport ieee1284 code in the kernel.
> 
> I expect hardware support will be somewhat easier for the USB module.
> 
> This should be doable by the time the 2.4 kernel is released, although
> this driver may not go into the kernel until 2.5 unless the development
> progresses very rapidly.
> 
> Question for the USB developers: Do you agree that it is a good idea to
> merge the two efforts, or do you have a different vision of how things
> should work?
> 
> Scott J. Bertin
> sbertin@mindspring.com
> 
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