I want to use the USB device interface.
Does somebody know which device controller is used in the RT5350 for USB Device?
Consult schematic / user manual.
In the datasheet of the rt5350f i can only find the base address of the USB device controller and some registers. I think this is too less to write a driver.
Did you look at OS (Linux/Android/etc) sources for drivers? Do you actually need to write one?