[alsa-devel] alsa on Atmel at91

Michel Benoit murpme at gmail.com
Wed Apr 18 11:18:11 CEST 2007

Hello again Liam,

> Frank has written a codec driver for a dumb BT codec (attached and link
> below). This could be renamed and with a little string changes could be
> used as a generic dumb codec driver.
> http://opensource.wolfsonmicro.com/~lg/tmp/asoc-codec-bluecore.patch

> I would use the eti_b1_wm8731.c as an example machine driver for your
> board. You will need to replace any WM8731 references and add your
> boards own specific clocks, gpio's etc.

I am able to build a soc driver for my hardware using the bluecore
codec driver and et1_b1_wm8731 machine code as examples.

The driver gets recognized by alsa at startup.  The ssc registers are
set correctly but my original problem still remains.  I can play
random noise with test/pcm_min but with test/pcm the alsa lib returns
a period_size of 0, despite the fact I set period_time to 100000.

I start to suspect that I have a problem with alsa lib.  How did you
cross compile alsa lib för the at91?


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