Anyone talking to AC97 codecs?

Jeff Garzik (jgarzik@mandrakesoft.com)
Sun, 05 Dec 1999 04:46:17 -0500

IF I understand the AC97 specs and my hardware correctly, I need to use
my hardware's implementation of AC-Link to send PCM audio to/from the
codec.

The Via audio chip's AC-Link is implemented using scatter-gatter DMA.
All the pieces are present except for:

exactly what data is written to the scatter-gather DMA buffers?

The AC97 docs talk about input and output slots, so I presume that an
audio frame needs a special AC97 header of some sort...

Thanks for any enlightenment. All the AC97 code I've seen in ALSA and
the kernel is mixer-related code, which is not what I'm looking for.

Regards,

Jeff

-- 
Jeff Garzik              | Just once, I wish we would encounter
Building 1024            | an alien menace that wasn't immune to
MandrakeSoft, Inc.       | bullets.   -- The Brigadier, "Dr. Who"


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