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Date: Tue, 12 Oct 2010 19:25:40 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
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Subject: Re: [Xenomai-help] Xenomai and PEAK can bus card problem
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To: Peter Pastor <peter.pastor@domain.hid>
Cc: xenomai@xenomai.org

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Am 12.10.2010 17:28, Peter Pastor wrote:
> Hey Jan, Wolfgang,
>=20
>> You can't change reality (physical wiring) this way.
> Well, I guess you are right !
>=20
>> If you do not need the USB interface, unbind the driver so that the
>> Linux IRQ usage ends:
>=20
> I might not need the USB interface. At least there are 6 USB ports on t=
he
> back, so I hope I do not disable all of them.
> However, besides the USB controller
>=20
> 00:1a.0 USB Controller [0c03]: Intel Corporation 82801JI (ICH10 Family)=
 USB
> UHCI Controller #4 [8086:3a37]
>=20
> the IRQ 16 is also shared by
>=20
> 05:00.0 SCSI storage controller [0100]: LSI Logic / Symbios Logic SAS10=
68E
> PCI-Express Fusion-MPT SAS [1000:0058] (rev 08)

Then you might be lost if you can't live without that controller as well
or flip PCI slots (see FAQ link below).

>=20
> which I guess I cannot simply unbind from the PCI bus... (check lspci.t=
xt
> attached)
>=20
> Also, I did a
>=20
> # echo 0000:00:1a.0 > /sys/bus/pci/drivers/ehci_hcd/unbind
>=20
> but it does work for me... --> bash: echo: write error: No such device
> Do I have to have PCI hot-plugging enabled or some such ?

No. Check what /sys/bus/pci/devices contains, which directory points to
your USB controller.

>=20
> Also, I have seen in
> /usr/src/xenomai-2.5.5.1/doc/generated/html/life-with-adeos that there
> methods to share interrupts even between domains. So my question is, is=

> there an option that allows me to do so ? Is that recommended ?
> Unfortunately, I am stuck to use this particular motherboard.

Please see
http://www.xenomai.org/index.php/FAQs#What_can_I_do_if_Xenomai_and_Linux_=
devices_share_the_same_IRQ.3F
and recent discussions on this list (or xenomai-devel, google will help).=


Jan


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