[Gnewsense-dev] Re: [loongson-PATCH-v1 24/27] fixup for FUJITSU disk

[Sergei Shtylyov]

Bartlomiej Zolnierkiewicz wrote:

> > yanh 写道:

> [...]

> > > the cs5536 pata driver have some geode platform dependent codes. We can
> > > just ignore it, but the performance is poor(using hdparm to test it),
> > > which only get 22+ MB/s. we find it only use udma2. However if using
> > > amd74xx driver, it can set udma5, and the speed can reach to 50+ MB/s. 

> > > we will test whether this driver is working well without this patch.

> > > Anyway, thanks your advice.

> > Use the driver drivers/ata/pata_cs5536.c, unfortunately it also have the 
> > same issue.

> Both drivers (pata_cs5536 & cs5536) should handle UDMA5.

> Could you please explain the issue with platform specific code a bit more?

> Is it related to a cable detection by any chance?

   I guess it's rdmsr()/wrmsr()...

> Thanks.
> Bart

MBR, Sergei