Promise Ultra100 TX2 support broken?

[Felix Deichmann]

Hi.

I have a Promise Ultra100 TX2 card with 2 brand new Maxtor drives. The
setup should work in UDMA100 mode, but is downgraded to PIO mode 4 under
FreeBSD 4.8.
Hardware is definitely OK, I have 2 controllers, 6 different 80 wire IDE
cables, shielded and unshielded and no irq conflicts. Always the same
problem. Disks work perfectly on an onboard VIA controller under NetBSD.
The Promise BIOS is the latest. NetBSD also downgrades to PIO mode 4 in 
an Alpha AXPpci33. Maybe some registers not setup correctly by the
driver(s)?

dmesg excerpt:

[...]
atapci0: <Promise TX2 ATA100 controller> port
0xe080-0xe08f,0xe0a0-0xe0a3,0xe090-0xe097,0xe0a4-0xe0a7,0xe098-0xe09f
mem 0x84000000-0x84003fff irq 10 at device 14.0 on pci 0
[...]
ad4: 39205MB <Maxtor 6E040L0> [79656/16/63] at ata2-master UDMA100
[...]
ad4: UDMA ICRC error reading fsbn 0 (ad4 bn 0; cn 0 tn 0 sn 0) retrying
ad4: UDMA ICRC error reading fsbn 0 (ad4 bn 0; cn 0 tn 0 sn 0) retrying
ad4: UDMA ICRC error reading fsbn 0 (ad4 bn 0; cn 0 tn 0 sn 0) retrying
ad4: UDMA ICRC error reading fsbn 0 (ad4 bn 0; cn 0 tn 0 sn 0) falling
back to PIO mode


Help would be greatly appreciated!

Regards

Felix