Subject: Re: OSS lkm for NeoMagic (was: Re: a.out and -current)
To: Nathan J. Williams <nathanw@MIT.EDU>
From: Jonathan Stone <jonathan@DSG.Stanford.EDU>
List: current-users
Date: 02/06/2000 11:29:12
In message <>Nathan J. Williams 
><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.

But of course. However I'd already fudged up a fair chunk
of the front-end code, based on the Linux driver. Or I could
reuse the relevant chunks of the FreeBSD driver.