How to use the PCIe port on M.2 ?

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

I want to use the pcie port on M.2 to extend more USB ports,so I design a board with uPD720202(PCIE to 2-Port USB3.0),but it does not work,I know this port is for some SSD,I want to know whether this pcie can use for uPD720202? And how to configure it?

2

You can just change the ODMDATA in your p2771-0000.conf.common to 0x90000

Please refer to this wiki page for more detail.
https://elinux.org/Jetson/TX2_USB#USB-Lane_Mapping

or TX2 adaptation guide → usb lane mapping.

3

Thanks for your help! I can find my board now, but can’t creat new xhci port. I think that’s my design error, I forgot add a eeprom for store device firmware, I will check it soon, thanks for your help!