This page demonstrate the overview of how to debug PS USB controller on Versal & ZynqMP platforms.

Table of Contents

Basic checks before debugging further

Observing the failure:

• Host mode - Run the below command to check whether pendrive detected or not.

      lsusb

• Device mode - Need to check this below node is created or not

   /sys/class/udc/*/uevent

Diagnosis:

• Kernel boot log -- Check the kernel boot logs is there any suspicious logs (dumps) are there or not.

• Kernel Config -- Check the corresponding kernel configs for USB mode : Versal Linux USB Device Driver Examples

• Device Tree -- Check the corresponding Device tree changes for USB mode : Versal Linux USB Device Driver Examples

• Check the USB jumper settings -- Check the corresponding USB mode jumper settings : Versal Linux USB Device Driver Examples

Guidelines on debugging USB runtime failures

• Check hardware design

• USB driver logs

• Dynamic debug

• ftrace (function tracer)

• USB register dump

• USB protocol analyzer trace

USB Hardware Design

• Review schematics

• Review PCB layout - Refer to Xilinx pcb guidelines recommendations