pcm sound driver for SBus Ultra1/Ultra2

Marius Strobl marius at alchemy.franken.de
Thu Jul 1 04:11:10 PDT 2004

On Thu, Jul 01, 2004 at 06:32:25PM +0900, Pyun YongHyeon wrote:
> Hello All,
> I don't know how may users want to hear sound on Ultra1/Ultra2.
> But I wanted to hear some music while 'build world' is in progress.
> <Driver summary>
>  1. The driver is based on OpenBSD's driver and ISA mss driver
>     on FreeBSD.
>  2. Supports onboard CS4231A chip on SBus Ultra1/Ultra2.
>  3. Capture(recodring) was not tested at all.
>       - I don't have microphone.
>  4. Due to lack of programming information for APC DMA, I
>     used existing interfaces of OpenBSD driver. So it may have
>     some bugs on FreeBSD.
>  5. Full-duplex mode doesn't work.
>  6. You may notice some noise when you work on ofw console. I don't
>     know what is the reason, atm.
>  7. Due to lack of X supports, I could't test with xmms or GUI based
>     audio tools.
>  8. If you have PCI/EBus based sparcs, they are not supported. Yes, they
>     use the same chip but have different DMA interface. In addition, I
>     don't have PCI/EBus based sparcs.
> Installation
>  1. get the driver patch file and fetch your system
>  2. build kernel and kernel modules
>  3. load snd_cs4231.ko and play
>      Note, you may want to mute speaker output with mixer(8).
> The attached patch is for -CURRENT, and is also available at:
>  http://www.kr.freebsd.org/~yongari/cs4231.freebsd.diff

Interesting that adding a driver is sufficient for you. Last time I
had a look at getting pcm(4) and SUNW,CS4231 working on FreeBSD/sparc64
I stumbled on pcm(4) not being endian-clean and not yet being fully
converted to using busdma. At a quick glance that's still the case.
Did you miss to add some changed files in your patch?

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