Internal Loopback issue in USB with MPC8555E

[srijithr]

We are using an in-house Power PC board with MPC8555E processor.We are currently developing drivers for USB on bare

board(Non-RTOS).

We started with testing Internal Loop-back for USB.We have written code taking

reference from MPC8555E User Manual, where a sample procedure has been given for

Configuring USB Host Controller for Internal Loop-back.Also, we referred U-boot and

Linux code for this purpose.

We are not able to achieve loop-back.You are requested to guide in this matter at

the earliest.

[lunminliang]

Please find attched simple example for MPC8555 USB which uses TRBD mode, it's not loopback mode but can be changed to.