From: "Pierre Le Magourou" <lemagoup@gmail.com>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] Isochronous problem with usb OHCI
Date: Mon, 17 Nov 2008 17:20:38 +0100 [thread overview]
Message-ID: <84501dc10811170820q5003cb44j91df9026fb419c9b@mail.gmail.com> (raw)
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Hi,
I try to use a webcam (logitech E 3500) through Qemu USB OHCI and have a
problem with isochronous frames. Here is a little description :
When Isochronous traces are activated I can see that isochronous packets
come from the host (async_complete function in usb-linux.c). These packets
are then completed in hw/usb-ohci.c, there it calls ohci_process_lists
function with completion parameter set to 1. The problem is that it then
does not call the ohci_service_ed_list function in order to finish the
isochronous packet completion and send it to the target. The OHCIState->ctl
is neither a control nor a bulk list.
In fact, I wonder what is the normal behavior for an isochronous packet
completion. Does someone have had a similar problem with isochronous frames
when using usb ohci ?
--
Pierre
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next reply other threads:[~2008-11-17 16:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-17 16:20 Pierre Le Magourou [this message]
2008-12-09 13:33 ` [Qemu-devel] Isochronous problem with usb OHCI baibai_tao
-- strict thread matches above, loose matches on Subject: below --
2008-11-17 13:35 ML_PierreLeMagourou
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