In message <05a565065dda0a705ccb657f0295afde@earthlink.net>, Michael writes:
>The snapper driver should work for you, it's output-only right now 
>though.

Hmm.  Nope!  My i2s says it's compatible with "AOAKeylargo", not "snapper".

Hacking the driver to match it anyway produces:

snapper0 at obio0 offset 0x10000: irq 30,1,2

Audioctl and suchlike work, but:

# audioplay altar.wav
audioplay: failed to open /dev/sound0: Invalid argument

-s