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Linux - Embedded & Single-board computer This forum is for the discussion of Linux on both embedded devices and single-board computers (such as the Raspberry Pi, BeagleBoard and PandaBoard). Discussions involving Arduino, plug computers and other micro-controller like devices are also welcome.

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Old 03-29-2009, 12:31 AM   #1
indojindes
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Registered: Mar 2009
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Question PCIE-to-PCI Bridge is not getting detected.


I have been trying to bring-up Pi7c9x110 Pericom PCIE-to-PCI bridge (in Transparent mode) on my Embedded board from past two weeks.

Initially when I insert my bridge on PCIe 1x slot, board used to get detect without any change in kernel code. I wrote a small driver which fetches bridge capabilities. In transparent mode after completing testing, we tried to switch the board to non-transparent mode by changing some jumper settings.There was no use. Kernel was not able to detect board in non-transparent mode.I mean no entry of the board when I used $lspci command. So, we again switched back to transparent mode by undoing the jumper setting.

Problem begun from here. Kernel was not able to detect the PCIe bridge. Earlier, we used to confirm the device entry by cat /proc/bus/devices. It used to show the entry:VendorIDeviceID. Now nothing is shown.

We tried the same card in x386 Fedora core linux PC, its getting detected. I confirmed by $lspci

Can any one help me or suggest me what exactly is going wrong. I ordered new bridge board from pericom but I am facing the same problem .

There are couple of questions regarding this situation.

1.Some thing went wrong after doing some jumper settings while switching to non-transparent mode. If this is the case why my newly ordered bridge is not getting detected ? Am I missing any step ?
2. Are both boards are broken ?
3. Why the same board is getting detected on Fedora Linux PC ?

Thanks in Advance,
Indojindes
 
Old 04-21-2011, 09:18 AM   #2
madhukar516
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Registered: Apr 2011
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Hi

Hi Indojindes,

i need some help on this pericom bridge driver.
i just started working on this Pericom driver for Linux 2.6 kernel on our board for backplane communication.

Do you have any basic linux driver code for this Pericom bridge working.
Pericom model: PI7C9X110.
Vendor-id:0x12d8, Device-id: 0xe11.

Please reply..

Thanks in Advance..
Madhukar.
 
  


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