How to get source code of deva-ctrl-intel_hda.so?

Hello all,

Because I need to porting ALC662 HD Audio codec on QNX 6.4.
I found there are deva-ctrl-intel_hda.so on QNX 6.4, but only binary format.
Does anyone know how to get source code of deva-ctrl-intel_hda.so?
I need the source code for reference.
Thank you.