On Mon, 2 Jan 2006, naveen kumar wrote:

> Hi Alan,
> 
>  I have one more doubt about host controller
> hardware.If there is an ehci host controller present
> in a system , then it will have its own implementation
> specific registers.Does the same ehci host controller
> hardware also includes the register set of companion
> host controllers also.

No.  The companion controller hardware has its own register set.

>  Because uhci (or) ohci drivers
> operate on the different set of registers than ehci
> register set.I confirmed this by checking /proc/iomem
> for ehci & /proc/ioports for uhci.

That's right.

Alan Stern



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