[alsa-devel] Sound Card driver for audio codec, mux and dsp.

Hi there,

I need to develop a solution to expose to userspace a single sound card with mixer controls for:

Audio codec : sgtl5000 Audio mux: used to select an audio source on sgtl5000 LINE_IN. Audio dsp :sta309a

How can I implement this drivers? Should I have to create a sound-card driver which is going to register and control the other drivers (codec, mux, dsp)?

Is there some device driver or tutorial guide that I can use as an example?

I'm using the kernel 3.0.15 from Freescale [1].

[1] - http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/log/?h=imx_3.0.1...

Kind Regards,

-- *dS Diego Sueiro