From mboxrd@z Thu Jan  1 00:00:00 1970
From: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Date: Thu, 15 May 2008 10:46:04 +0200
Subject: [U-Boot-Users] U-Boot help request for OHCI driver with CPU
	cache on
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Message-ID: <200805151046.04579.matthias.fuchs@esd-electronics.com>
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To: u-boot@lists.denx.de

Hi Ryan,

you are probably using the CONFIG_USB_OHCI_NEW option for your
PCI OHCI controller. The code in drivers/usb/usb_ohci.c is currently
not aware of caches. So we need to add some flush/invalidates at the correct
places.

I think nobody will keep you from starting to work on this :-)

Matthias

On Thursday 15 May 2008 06:33:07 Ryan CHEN wrote:
> Hi all,
> I am porting U-Boot to a MIPS64 platform, that uses USB host controller NEC
> uPD720101 on PCI bus.
>
> I didn't modify anything related with USB driver, I just enabled OHCI in
> the configuration. When CPU cache is disabled, USB is perfect working.
> When CPU cache is enabled, every driver works well but not USB.
>
> Could you suggest me how to solve the problem?
> Is there any specific part of USB driver that requires cache handling?
>
> Best Regards,
> Ryan Chen
>