Audio driver template

[Yuriy Tsibizov]

> > http://people.freebsd.org/~cg/template.c
> >
> > Thought I would take a look at the audio driver template as
> > part of my task to modernize drivers, soc2007. I would simplify
> > the read and write functions to avoid using the bus tag and
> > handle, but I'm not sure what else to do to bring it up to date.
> >
> > How else can it be improved?
> 

> And you should clarify what kind of improvements are valid for your  
> SoC work. Somehow I doubt that adding shiny new features (like hps  
> suggested) is part of the goal for your work. I think it's more like  
> bringing existing drivers up-to-par with currently available generic  
> driver interfaces, isn't it?
> 
> I also think examples for suspend/resume stuff should be added.  
> /sys/dev/sound/pci/atiixp.c has suspend and resume methods if 
> you want  
> an example.
> 
> You could also review the locking, as it changed a little bit  
> recently, I think.
> 
> Apart from the atiixp driver the envy42, emu10kx and HDA drivers can  
> also serve as examples for what is the most current in the sound  
> subsystem in FreeBSD. Maybe you can gain some more hints from 
> them (I  
> think the template is not very up-to-date compared to them).

emu10kx is bad example, because it uses a lot of "hacks", like 
ac97 codec emulation.


Yuriy.