USB Host controller for MPC8548e board

USB Host controller for MPC8548e board

[Michael Kelly]

Hello all.  We are in the process of designing an MPC8548e board.  We 
wish to add
USB host via either the NXP ISP1561 or NEC upd720101.  They are both OHCI and
EHCI.

Is there any general advice on one over the other or even if it is 
realistic to have a USB
host controller on a big endian processor?

Regards,
Michael


Michael J. Kelly
VP Engineering
Cogent Computer Systems, Inc.
17 Industrial Dr.
Smithfield, RI 02917 USA
tel: 401-223-3441, fax: 401-223-3442
email: mike@cogcomp.com
alternate email: mkelly6505@hotmail.com
web: www.cogcomp.com

Re: USB Host controller for MPC8548e board

[Kumar Gala]

On Feb 13, 2007, at 6:21 PM, Michael Kelly wrote:

> Hello all.  We are in the process of designing an MPC8548e board.  We
> wish to add
> USB host via either the NXP ISP1561 or NEC upd720101.  They are  
> both OHCI and
> EHCI.

Haven't worked with either of this, you're probably better asking  
about this on the linux-usb list.

> Is there any general advice on one over the other or even if it is
> realistic to have a USB
> host controller on a big endian processor?

There shouldn't be any issue with having a USB controller on a big- 
endian processor.

If your connecting them over PCI it should pretty easy to get them up  
and running.

- k

Re: USB Host controller for MPC8548e board

[Michael Kelly]

The reason I asked here is that they are in the kernel and seem to be 
as well supported.  I was
just more concerned if there were any PowerPC specific issues.  We 
are likely going ahead
with the NEC (since that is what was used on the G5 MAC's, I think), 
and we'll find out just how
well they work!  That's what prototypes are for.

Thanks,
Michael

At 08:19 PM 2/13/2007, Kumar Gala wrote:

>On Feb 13, 2007, at 6:21 PM, Michael Kelly wrote:
>
>>Hello all.  We are in the process of designing an MPC8548e board.  We
>>wish to add
>>USB host via either the NXP ISP1561 or NEC upd720101.  They are
>>both OHCI and
>>EHCI.
>
>Haven't worked with either of this, you're probably better asking
>about this on the linux-usb list.
>
>>Is there any general advice on one over the other or even if it is
>>realistic to have a USB
>>host controller on a big endian processor?
>
>There shouldn't be any issue with having a USB controller on a big- 
>endian processor.
>
>If your connecting them over PCI it should pretty easy to get them up
>and running.
>
>- k
>
>

Michael J. Kelly
VP Engineering
Cogent Computer Systems, Inc.
17 Industrial Dr.
Smithfield, RI 02917 USA
tel: 401-223-3441, fax: 401-223-3442
email: mike@cogcomp.com
alternate email: mkelly6505@hotmail.com
web: www.cogcomp.com

Re: USB Host controller for MPC8548e board

[Benjamin Herrenschmidt]

On Tue, 2007-02-13 at 19:21 -0500, Michael Kelly wrote:
> Hello all.  We are in the process of designing an MPC8548e board.  We 
> wish to add
> USB host via either the NXP ISP1561 or NEC upd720101.  They are both OHCI and
> EHCI.
> 
> Is there any general advice on one over the other or even if it is 
> realistic to have a USB
> host controller on a big endian processor?

Are they PCI based ? In this case they should pretty much work out of
the box.

Ben.

Re: USB Host controller for MPC8548e board

[Michael Kelly]

They are PCI based, so that's good news!

Thanks, I'll let you know how it all works out.  I'm sure I'll be asking other
questions as we go along.

Michael


At 08:48 PM 2/13/2007, Benjamin Herrenschmidt wrote:
>On Tue, 2007-02-13 at 19:21 -0500, Michael Kelly wrote:
> > Hello all.  We are in the process of designing an MPC8548e board.  We
> > wish to add
> > USB host via either the NXP ISP1561 or NEC upd720101.  They are 
> both OHCI and
> > EHCI.
> >
> > Is there any general advice on one over the other or even if it is
> > realistic to have a USB
> > host controller on a big endian processor?
>
>Are they PCI based ? In this case they should pretty much work out of
>the box.
>
>Ben.

Michael J. Kelly
VP Engineering
Cogent Computer Systems, Inc.
17 Industrial Dr.
Smithfield, RI 02917 USA
tel: 401-223-3441, fax: 401-223-3442
email: mike@cogcomp.com
alternate email: mkelly6505@hotmail.com
web: www.cogcomp.com