Hi,

I'm an "Asus Pundit-R" owner, and like many of them I had troubles using 
the sata port (hdc).
hparm -t /dev/hdc gave me 15MB/sec and hdparm -I gave me udma2.

I've read atiixp.c and found that in the IXP200 case, the 
eighty_ninty_three() call fails so the slowest mode is selected.

        if (!eighty_ninty_three(drive))
                mode = min(mode, (u8)1);
       }

It sounds like on the IXP200 we must skip this test to reach the udma5. 
I've tried manually and it works.
I'm reaching 55MB/sec and hdparm -I give me udma5.

I've made a patch which match the IXP200 and "hdc" configuration.
In that case only, I'm skipping the eighty_ninty_three() call.
The patch works and apply to 2.6.10 -> 2.6.14-rc3.

I know that checking "hdc" is not very clean but I didn't find a more 
generic way to test if the "ide_drive_t *drive" is the sata port of the 
IXP200.
In the "Pundit-R" case, that's always hdc.

What do you think about that ?
Please found attached, my patch for atiixp.c

Regards,