AC97 compatible AD1981 codec driver for blackfin 537

Hi,

I need to make .wav file driver on BF537 board. I have AC97 compatible
AD1981 codec on our board connected to BF537 via SPORT interface. Can
some body explain me how to start with it?

I want to know how can read/write the code registers and how to send
the PCM data to the codec.

I did .wav file driver for BF537 Ezkit. Here I reset the codec and the
reset state of the codec was enough for me! Then I sent the PCM data
from .wav file to the codec using SPORT DMA transfer. I want to do the
same thing for AD1981 codec.

Regards.
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