Hi,
We are using a custom board based on Ampere SOC. We have two Renesas USB
controller uPD720201 in our setup.
1. Renesas USB controller on custom module based on Ampere SOC.
- Connected to Pcie Root complex port directly.
2. Renesas USB controller on custom carrier board.
- Connected to Pericom Pcie Switch (PI7C9X2G) and the switch in-turn
connected to another Pcie Root complex port.
We are using the below driver for downloading the USB controller firmware.
https://github.com/Linaro/OpenPlatformPkg/tree/4edacd6541c22eac97098c9f68186438e775fb0c/Drivers/Xhci/RenesasFirmwarePD720202
This driver will just download the firmware for the controller. It will not
drive the device.
This driver will be called in preference, and XhciDxe will be invoked
after RenesasPD720202DriverSupported returns EFI_UNSUPPORTED.
Firmware downloading successfully and device is driven successfully with
XhciDxe for the device connected directly in Pcie Root complex port.
Issues with USB controller connected in Pcie switch:
RenesasFirmwarePD720202 driver:
For USB controller connected in Pcie switch, firmware is not downloading as the
device handle is not passed to Supported() function during ExitBootService
(ConnectController()) of edk2.
NOTE: Device is detected during pci bus enumeration. Also verified device
detection in uefi shell using "pci" command.
We did a workaround implementation which will do pci bus scan to detect the USB
controller connected in Pcie switch and download the firmware. Device detected
and firmware downloaded successfully.
But still the USB devices (mass storage/keyboard) are not detecting in Setup
page and Uefi Shell.
We feel the XhciDxe driver did not drive this device as only the parent devices
handle passed to this driver.
NOTE: USB ports are active, devices detected and working well in OS side.
We feel the Xhci driver in OS, drives the USB controller device when the
controller has firmware.
How to pass the device handle for the USB controller connected in Pcie switch
during ExitBootService ?
We understand if RenesasFirmwarePD720202 driver and XhciDxe get the device
handle for the USB controller that is connected in Pcie switch, the above
mentioned issues will get resolved. Please advise if our understanding is wrong
here.
Please provide your inputs.
Thanks,
Antony
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