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How to force LS1012A PCIe into Gen 1 mode?

Question asked by Jason Wu on Jul 31, 2018
Latest reply on Aug 8, 2018 by Yiping Wang

I installed the PI7C9X2G304SLBFDE PCI-E switch kit on LS1012ARDB, but sometimes it can't be detected PCI-E switch.

 

I would like to force it into Gen 1 mode for testing, how to modify the drivers and force Gen 1 mode?

 

Thank you.

Can detect:
root@TinyDistro:~# cat /proc/bus/pci/devices
0000 19578100 1e 0 0 0 0 0 0 4040000000 0 0 0 0 0 0 800 pcieport
0100 12d82404 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 pcieport
0208 12d82404 1f 0 0 0 0 0 0 0 0 0 0 0 0 0 0 pcieport
0210 12d82404 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 pcieport
0218 12d82404 21 0 0 0 0 0 0 0 0 0 0 0 0 0 0 pcieport


Not detect:
root@TinyDistro:~# cat /proc/bus/pci/devices
0000 19578100 1e 0 0 0 0 0 0 4040000000 0 0 0 0 0 0 800 pcieport

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