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AM5718: USB Hub reset

yf liao
Expert 1080 points
Part Number: AM5718
Other Parts Discussed in Thread: TUSB8041,

Hi, we have USB hub(TUSB8041) connected to AM5718 USB1 interface. I want to confirm that whether Linux driver support resetting the hub when there is error condition detected(my assumption on the error condition maybe ESD event cause hub connection lost), and is the software reset is a reliable way to recover the hub from malfunction state?

  • 0
    TI__Guru**** 167581 points

    Hi,

    In Linux kernel USB stack, many layers of the drivers can issue bus reset command in different error conditions, from the USB controller driver to the USB application drivers. But in your specific case - hub connection is lost due to ESD, I don't think the USB controller driver will issue bus reset, because it cannot distinguish if it is an error condition or normal detach.

    Regarding your second question about hub recovery, please create a new e2e post selecting part TUSB8041 instead of AM5718 so that your query can be routed to the proper support team.