USB + MPC5200 L25R REV 2 OCT0511C

USB + MPC5200 L25R REV 2 OCT0511C

[Achim Machura]

Helo list,

do everybody know about problems with usb (usb-ohci) and MPC5200 label  L25R
REV 2 OCT0511C.

When i plugg in a usb-device, i see that the kernel will assign an address
to the device, but it failed by timeout.

The same kernel an the same usb-device works fine on a board with a cpu
label 0L25R QAH0410

best regards

Achim

____________________________________________
Achim Machura Softwareentwicklung
Berghof Automationstechnik GmbH
Harretstrasse 1, D-72800 Eningen u.A.
Tel: +49-7121-894-131, Fax: +49-7121-894-100
email: machura@berghof.com
Internet: http://www.berghof.com

Re: USB + MPC5200 L25R REV 2 OCT0511C

[Bob Peterson]

Hi Achim and List,

I've recently been doing some experiments regards USB on our custom
icecube-like mpc5200 board using the usb-ohci driver, and here's what I found:

1. Some devices (high speed?) seem to work fine.  I used a USB jump drive.
2. Other devices (low speed?) like USB keyboard and mouse did not.
3. Plugging a USB hub into the board allows the same failing devices
     (kbd & mouse) to work properly (when they are plugged into the hub).
4. The off-the-shelf icecube board behaves the same way, so it's not just our
     board.

I haven't tried to backtrack this because USB isn't a major aspect of 
our product
and I've got higher priorities.

Regards,

Bob Peterson
Advanced Communication Design
(952) 854-4000

At 06:21 AM 8/4/2005, Achim Machura wrote:
>Helo list,
>
>do everybody know about problems with usb (usb-ohci) and MPC5200 label  L25R
>REV 2 OCT0511C.
>
>When i plugg in a usb-device, i see that the kernel will assign an address
>to the device, but it failed by timeout.
>
>The same kernel an the same usb-device works fine on a board with a cpu
>label 0L25R QAH0410
>
>best regards
>
>Achim
>
>____________________________________________
>Achim Machura Softwareentwicklung
>Berghof Automationstechnik GmbH
>Harretstrasse 1, D-72800 Eningen u.A.
>Tel: +49-7121-894-131, Fax: +49-7121-894-100
>email: machura@berghof.com
>Internet: http://www.berghof.com
>
>
>_______________________________________________
>Linuxppc-embedded mailing list
>Linuxppc-embedded@ozlabs.org
>https://ozlabs.org/mailman/listinfo/linuxppc-embedded

RE: USB + MPC5200 L25R REV 2 OCT0511C

[Martin Krause]

Hi Bob,

linuxppc-embedded-bounces@ozlabs.org wrote on Thursday, August 04, 2005
3:36 PM:=20
> I've recently been doing some experiments regards USB on our custom
> icecube-like mpc5200 board using the usb-ohci driver, and here's what
> I found:=20
>=20
> 1. Some devices (high speed?) seem to work fine.  I used a USB jump
> drive.=20
> 2. Other devices (low speed?) like USB keyboard and mouse did not.
> 3. Plugging a USB hub into the board allows the same failing devices
>      (kbd & mouse) to work properly (when they are plugged into the
> hub).=20
> 4. The off-the-shelf icecube board behaves the same way, so it's not
>      just our board.

This is most probably an issue with the used USB transceivers. The
Phillips transceivers ISP1106 and ISP1107 are known to not work
correctly with the MPC5200 (with low speed Devices).

The following Transceivers should work:

- Phillips PDIUSBP11
- Fairchild USB1T11AMTC

Regards,
Martin

TQ-Systems GmbH
M=FChlstra=DFe 2, Gut Delling, 82229 Seefeld
Tel. +49 (8153) 93 08-157, Fax +49 (8153) 93 08-7157
martin.krause@tqs.de
www.tq-group.com