linux-kernel - Re: Unhiding devices in pci bus

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Date:	Fri, 29 Aug 2008 17:43:04 +0200
From:	""J.A. Magallón"" <jamagallon@....com>
To:	Linux-Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Unhiding devices in pci bus


On 2008.08.29, at 16:36, J.A. Magallón wrote:

> Hi all...
>
> I have an Aspire One, and the JMicron SD Card reader is hidden from  
> sysfs
> space, it only shows if I do an lspci -H1 (direct hardware access):
> ...
> 00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI  
> Express Port 1 (rev 02)
> 00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI  
> Express Port 2 (rev 02)
> 00:1c.2 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI  
> Express Port 3 (rev 02)
> 00:1c.3 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI  
> Express Port 4 (rev 02)
> ...

Forgot to say that this only happens after you have inserted a card
once. You can then remove it and the device stays there.
Unfortunately I can't boot with the card in, because udev hangs
forever on boot...

>
> 04:00.0 System peripheral: JMicron Technologies, Inc. Device 2382
> 04:00.2 SD Host controller: JMicron Technologies, Inc. Device 2381
> 04:00.3 System peripheral: JMicron Technologies, Inc. Device 2383
> 04:00.4 System peripheral: JMicron Technologies, Inc. Device 2384
>
> one:~# lspci -t
> -[0000:00]-+-00.0
>           +-02.0
>           +-02.1
>           +-1b.0
>           +-1c.0-[0000:01]--
>           +-1c.1-[0000:02]----00.0
>           +-1c.2-[0000:03]----00.0
>           +-1c.3-[0000:04]--
>           +-1d.0
>           +-1d.1
>           +-1d.2
>           +-1d.3
>           +-1d.7
>           +-1e.0-[0000:05]--
>           +-1f.0
>           +-1f.2
>           \-1f.3
>
> one:~# lspci -H1 -t
> -[0000:00]-+-00.0
>           +-02.0
>           +-02.1
>           +-1b.0
>           +-1c.0-[0000:01]--
>           +-1c.1-[0000:02]--
>           +-1c.2-[0000:03]----00.0
>           +-1c.3-[0000:04]--+-00.0
>           |                 +-00.2
>           |                 +-00.3
>           |                 \-00.4
>           +-1d.0
>           +-1d.1
>           +-1d.2
>           +-1d.3
>           +-1d.7
>           +-1e.0-[0000:05]--
>           +-1f.0
>           +-1f.2
>           \-1f.3
>
> lspci -M:
>
> ...
> 00: Primary host bus
> 	1e.0 Bridge to 05-05
> 	1c.3 Bridge to 04-04
> 	1c.2 Bridge to 03-03
> 	1c.1 Bridge to 02-02
> 	1c.0 Bridge to 01-01
> ...
>
> If I load the driver (sdhci), it does not detect anything. It looks  
> like
> it is hidden/hung after one of the pci bridges, how can I make this  
> device
> visible for the driver ?
>
> Thanks.
>
> --
> J.A. Magallon <jamagallon()ono!com>     \               Software is  
> like sex:
>                                         \         It's better when  
> it's free
> Mandriva Linux release 2009.0 (Cooker) for i586
> Linux 2.6.25-jam13 (gcc 4.3.1 20080515 (GCC) #1 SMP
>
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux- 
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--
J.A. Magallon <jamagallon()ono!com>     \               Software is  
like sex:
                                          \         It's better when  
it's free
Mandriva Linux release 2009.0 (Cooker) for i586
Linux 2.6.25-jam13 (gcc 4.3.1 20080515 (GCC) #1 SMP



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