Subject: Re: [PATCH] Add cmd64x IDE driver to default pmac32 config

From: lawrence rust <[email-masked]>
Date: Thu, 08 Jul 2010 08:18:27 +0200

On Thu, 2010-07-08 at 15:00 +1000, Benjamin Herrenschmidt wrote:
> On Sat, 2010-07-03 at 20:21 +0200, lawrence rust wrote:
> > The Blue/White Apple PowerMac G3 and early G4's use a cmd64x compatible
> > IDE disk controller.  E.g. lspci shows...
> > 
> > 01:01.0 IDE interface: Silicon Image, Inc. PCI0646 (rev 07)
> > 
> > Unfortunately the default pmac32 configuration does not include this
> > driver and so PowerMac G3's can't load a root filesystem.  This is an
> > issue on a least Ubuntu since version 9.04, which uses the default
> > config as a starting point.
> > 
> > Signed-off-by: Lawrence Rust <lawrence at softsystem.co.uk>
> 
> Shouldn't we just switch the whole thing to libata now anyways ?

Sure. it would be preferable but unfortunately the PowerMac on-board IDE
controller (CONFIG_BLK_DEV_IDE_PMAC), used for the DVD drive on B/W
G3's, doesn't have a PATA equivalent.  So it's pragmatic (until the IDE
code is removed) to use the IDE cmd64x driver to minimise kernel code
size.

A minor correction to my previous post, the first version of Ubuntu to
suffer from this problem was 9.10.

-- Lawrence
> 
> Cheers,
> Ben.
> 
> > diff -uprN a/arch/powerpc/configs/pmac32_defconfig b/arch/powerpc/configs/pmac32_defconfig 
> > --- a/arch/powerpc/configs/pmac32_defconfig	2010-05-16 23:17:36.000000000 +0200
> > +++ b/arch/powerpc/configs/pmac32_defconfig	2010-07-03 20:11:10.000000000 +0200
> > @@ -738,7 +738,7 @@ CONFIG_BLK_DEV_IDEDMA_PCI=y
> >  # CONFIG_BLK_DEV_AEC62XX is not set
> >  # CONFIG_BLK_DEV_ALI15X3 is not set
> >  # CONFIG_BLK_DEV_AMD74XX is not set
> > -# CONFIG_BLK_DEV_CMD64X is not set
> > +CONFIG_BLK_DEV_CMD64X=y
> >  # CONFIG_BLK_DEV_TRIFLEX is not set
> >  # CONFIG_BLK_DEV_CS5520 is not set
> >  # CONFIG_BLK_DEV_CS5530 is not set
> > 
> > 
> > 
> > 
> > _______________________________________________
> > Linuxppc-dev mailing list
> > [email-masked]
> > https://lists.ozlabs.org/listinfo/linuxppc-dev
> 
> 

-- 
-- Lawrence Rust