Linux/TLV320AIC3104: Linux driver parts missing

Tool/software: Linux

Hi

I am using the TLV320AIC3104 chip in Linux (with am3354) and it seems to works just fine. When reading the technical manual of the codec chip I realize that many features are not available in the Linux driver.

Here are a few examples. 

- Setting gain of the output stage, 0-9 dB (register 51, 58, 65, 7286, 93)

- Setting the volume of the input mixing stage. 0 -  -12dB

- Filtering and digital audio processing, 3-D effects, etc. Basically no registers in page 1 are used. 

So, are there any other driver code available that I have not found or do I have to write this myself?

BR
Andreas