There is no existing USB solution or example design available from Intel PSG. However, you may look into the Intel FPGA's partner's solution for the USB support from the following links. Please feel free to contact them if you have more questions.
If further support is needed in this thread, please post a response within 15 days. After 15 days, this thread will be transitioned to community support. The community users will be able to help you with your follow-up questions.