From: Michael Kelly <hidden> Date: 2007-02-14 00:44:23
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
From: Kumar Gala <hidden> Date: 2007-02-14 01:20:59
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
From: Benjamin Herrenschmidt <benh@kernel.crashing.org> Date: 2007-02-14 01:48:35
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.
From: Michael Kelly <hidden> Date: 2007-02-14 01:48:54
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:
quoted
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.
quoted
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
From: Michael Kelly <hidden> Date: 2007-02-14 02:17:11
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:
quoted
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
quoted
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