Check the values of the USBx_GHWPARAMS3 and USBx_DCFG registers.
The LS1046a USB register after reset are configured for SuperSpeed mode.
Have a great day,
Pavel Chubakov
Check your board using attached files. These files contains documentation and schematic for the LS1043ARDB USB and layout guidelines for high-speed interfaces (USB, PCI).
Have a great day,
Pavel Chubakov
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we had checked the schematic and compare with the reference design of LS1043RDB,however,we did not found any problem.
whether do some configs abou software or not? such as rcw or Register