- CS46xx driver
     - DSP is started after initializing AC97 codecs
     - rewrite SPDIF output stuff
     - variable period size support on playback and capture
     - DAC volume mechanism  rewrite
     - IEC958 input volume mechanism rewrite
     - added "AC3 Mode Switch" in mixer
     - code cleanups
   - ENS1371 driver
     - added definitions for the ES1373 chip
     - added code to control IEC958 (S/PDIF) channel status register