* isochronous mode of USB audio device on MPC5200
@ 2005-01-01 13:27 Benny Liu
0 siblings, 0 replies; 6+ messages in thread
From: Benny Liu @ 2005-01-01 13:27 UTC (permalink / raw)
To: linuxppc-embedded
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Hi, everyone, happy new year!
Did anyone try usb audio device or other isochronous mode usb devices on Icecube board(Motorola MPC5200)?
I tried, but it reports the following message:
"host/usb-ohci.c: OHCI Unrecoverable Error, controller usb-0 disabled"
After this message, the host controller is disabled.
Thanks a lot.
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^ permalink raw reply [flat|nested] 6+ messages in thread
* isochronous mode of USB audio device on MPC5200
@ 2005-01-01 13:28 Benny Liu
2005-01-01 22:19 ` Sylvain Munaut
0 siblings, 1 reply; 6+ messages in thread
From: Benny Liu @ 2005-01-01 13:28 UTC (permalink / raw)
To: linuxppc-dev
[-- Attachment #1: Type: text/plain, Size: 335 bytes --]
Hi, everyone, happy new year!
Did anyone try usb audio device or other isochronous mode usb devices on Icecube board(Motorola MPC5200)?
I tried, but it reports the following message:
"host/usb-ohci.c: OHCI Unrecoverable Error, controller usb-0 disabled"
After this message, the host controller is disabled.
Thanks a lot.
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: isochronous mode of USB audio device on MPC5200
2005-01-01 13:28 isochronous mode of USB audio device on MPC5200 Benny Liu
@ 2005-01-01 22:19 ` Sylvain Munaut
2005-01-02 4:20 ` Benny Liu
2005-01-02 4:21 ` Benny Liu
0 siblings, 2 replies; 6+ messages in thread
From: Sylvain Munaut @ 2005-01-01 22:19 UTC (permalink / raw)
To: Benny Liu; +Cc: linuxppc-dev
Hi Benny
What version of the kernel ?
In the last 2.4 I built ( quite a while ago ... ) there was a flaw
in the handling of the hwPSW field in the OHCI driver when on big-endian
platform. Since this field is only used fot Isochronous the problem
didn't show up before.
The fields were assume by the kernel to be in this order
hwPSW[0]
hwPSW[1]
hwPSW[2]
hwPSW[3]
...
But in fact since the figure in ohci spec shows this array not as an
array of 16bits fields but as an array of 32bits integer, each containing
two hwPSW[] in little endian order, they ended up implemented in the order
hwPSW[1]
hwPSW[0]
hwPSW[3]
hwPSW[2]
...
(fscked up isn't it ? ;)
And that was not taken into account ...
I notified W.Denk about the problem a while ago, don't know if any
action has been taken.
Sylvain Munaut
Benny Liu wrote:
> Hi, everyone, happy new year!
> Did anyone try usb audio device or other isochronous mode usb devices
> on Icecube board(Motorola MPC5200)?
> I tried, but it reports the following message:
> /"host/usb-ohci.c: OHCI Unrecoverable Error, controller usb-0 disabled"/
> After this message, the host controller is disabled.
> Thanks a lot.
>
>------------------------------------------------------------------------
>
>_______________________________________________
>Linuxppc-dev mailing list
>Linuxppc-dev@ozlabs.org
>https://ozlabs.org/mailman/listinfo/linuxppc-dev
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: isochronous mode of USB audio device on MPC5200
2005-01-01 22:19 ` Sylvain Munaut
@ 2005-01-02 4:20 ` Benny Liu
2005-01-02 4:21 ` Benny Liu
1 sibling, 0 replies; 6+ messages in thread
From: Benny Liu @ 2005-01-02 4:20 UTC (permalink / raw)
To: Sylvain Munaut; +Cc: linuxppc-dev
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: isochronous mode of USB audio device on MPC5200
2005-01-01 22:19 ` Sylvain Munaut
2005-01-02 4:20 ` Benny Liu
@ 2005-01-02 4:21 ` Benny Liu
1 sibling, 0 replies; 6+ messages in thread
From: Benny Liu @ 2005-01-02 4:21 UTC (permalink / raw)
To: Sylvain Munaut; +Cc: linuxppc-dev
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^ permalink raw reply [flat|nested] 6+ messages in thread
* isochronous mode of USB audio device on MPC5200
@ 2006-04-18 4:42 Sundar
0 siblings, 0 replies; 6+ messages in thread
From: Sundar @ 2006-04-18 4:42 UTC (permalink / raw)
To: linuxppc-dev
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Hi Benny,
I am also facing the same problem. Can you send me the details about the changes you have done.
Thank you for any help.
with warm regards,
sundar
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^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2006-04-18 8:18 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2005-01-01 13:28 isochronous mode of USB audio device on MPC5200 Benny Liu
2005-01-01 22:19 ` Sylvain Munaut
2005-01-02 4:20 ` Benny Liu
2005-01-02 4:21 ` Benny Liu
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2006-04-18 4:42 Sundar
2005-01-01 13:27 Benny Liu
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