Subject: Re: OSS lkm for NeoMagic (was: Re: a.out and -current)
To: Jonathan Stone <jonathan@DSG.Stanford.EDU>
From: Nathan J. Williams <nathanw@MIT.EDU>
Date: 02/06/2000 00:43:53
<jonathan@DSG.Stanford.EDU> (Jonathan Stone) writes:
> But... the neomagic is an ac97 device at heat. rather than porting the
> OSS driver, woudln't it make more sense to engineer a native netbsd
> driver, usign our ac'97 support, and the info in the OSS or linux
> 2.2.13 neomagic drivers?
This would be nice, yes.
I'd like to point out that AC'97 is a spec for the *back-end* A/D
engine and the interface that the actual audio chip uses to talk to
it. Thus, while we do have some generic AC'97 code, it's not as much
of a leg up as people sometimes seem to think - you still have to deal
with setting up the front-end chip: interrupts, DMA, programming the
sample rate converter, and other front-end-specific goo. The AC'97
support lets you get the mixer code for cheap, but not much else.