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From: Jung-uk Kim <jkim@FreeBSD.org>
To: Alexander Motin <mav@FreeBSD.org>
Date: Mon, 27 Apr 2009 13:55:26 -0400
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Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org,
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Subject: Re: svn commit: r191568 - in head/sys/dev/ata: . chipsets
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On Monday 27 April 2009 01:39 pm, Alexander Motin wrote:
> Jung-uk Kim wrote:
> > Author: jkim
> > Date: Mon Apr 27 17:29:51 2009
> > New Revision: 191568
> > URL: http://svn.freebsd.org/changeset/base/191568
> >
> > Log:
> >   - Always force AHCI mode on a ATI/AMD SB600/700/800 SATA
> > controller.  These controllers may be configured as legacy IDE
> > mode by modifying subclass and progif without actually changing
> > PCI device IDs.  Instead of complicating code, we always force
> > AHCI mode while probing.  Also we restore AHCI mode while
> > resuming per ATI/AMD register programming/requirement guides. -
> > Fix SB700/800 "combined" mode.  Unlike SB600, this PATA
> > controller can combine two SATA ports and emulate one PATA
> > channel as primary or secondary depending on BIOS configuration. 
> > When the combined mode is disabled, this channel disappears and
> > it works just like SB600 PATA controller, however. - Add more PCI
> > device IDs for SB700/800 and adjust device descriptions. SB800
> > shares the same PCI device IDs and added two more SATA IDs.
>
> Thanks.

Thank you for answering my stupid questions!

BTW, ATI SATA phy reset/resume requires slightly different sequence 
from generic AHCI one but it just works (with little annoying timeout 
message). :-)

Jung-uk Kim