ohci vs ehci

[Malcolm Herbert <mjch%mjch.net@localhost>]

I have a new Soekris net5501 with an internal 2.5in 250GB pata disk and
the same model disk in an external USB2.0 enclosure.  I'd like to create
a RAIDFrame mirror of the two but I suspect that ohci/ehci are getting
in the way and I'm ending up with a bus that's only running USB1.0

I first noticed this when raidctl claimed 4 days to sync the mirror,
which I thought a little excessive ... :)

I'm running NetBSD-4.0 GENERIC and the relevant portion of the boot
dmesg appears to be:

|ohci0 at pci0 dev 21 function 0: Advanced Micro Devices CS5536 OHCI USB 
Controller (rev. 0x02)
|ohci0: interrupting at irq 15
|ohci0: OHCI version 1.0, legacy support
|usb0 at ohci0: USB revision 1.0
|uhub0 at usb0
|uhub0: Advanced Micro OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
|uhub0: 4 ports with 4 removable, self powered
|ehci0 at pci0 dev 21 function 1: Advanced Micro Devices CS5536 EHCI USB 
Controller (rev. 0x02)
|ehci0: interrupting at irq 15
|ehci0: EHCI version 1.0
|ehci0: companion controller, 4 ports each: ohci0
|usb1 at ehci0: USB revision 2.0
|uhub1 at usb1
|uhub1: Advanced Micro Devices EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
|uhub1: 4 ports with 4 removable, self powered

To my mind, this indicates that the ohci driver is binding to the hardware
first and reducing the speed on the bus to USB1.0 speeds.  The question is,
how can I remove ohci or reorder ohci and ehci so that I get better speed
out of the bus?  

I would prefer not to recompile the kernel and keep everything stock if I
can ... presumably I can put reconfigure options into the boot blocks
and do it that way - are there any docs on doing something like this?

Regards,
Malcolm

-- 
Malcolm Herbert                                This brain intentionally
mjch%mjch.net@localhost                                                left 
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