AM4372: USB Host Boot issue

Hi Genesh,

Do you mean the same Linux image can boot with Kingston Datatraveler G4 but not with HP 236w? Does the board serial console print any log with boot failed with HP 236w?

Hi,

Yes, that's right. 

No serial out when boot failed.

Thanks

Ganesh

Hi,

Yes, that's right. 

No serial out when boot failed.

Thanks

Ganesh

Hi Ganesh,

If the serial console has no any message, it is likely because the thumb drive is not enumerated by the ROM.

Since the same Linux image can boot on other thumb drives, I don't think this is a software issue.

Hi Bin,

I am wondering how HP 32GB same model works but 16 GB doesn't work. Do you still believe USB enumeration issue?

I will keep testing other images with these USB devices and keep you posted.

Also, could you help me to locate the latest version of "proc-sdk-secdev-am437x-hs-evm-XX"? 

Hi Ganesh,

Each USB device (even if they look exactly the same from the outside packaging) from different manufacturing batch could have a completely different internal USB design, from hardware to firmware, so the behavior could be different.

One way to check if it is enumeration issue, would be to hook up a USB protocol analyzer and capture the USB bus traces.

I am looping in our High-Security device expert for comments on the latest SDK.

Hello Ganesh,
The "proc-sdk-secdev-am437x-hs-evm-01.06.00.05" is the latest AM437x SecDev package available.
Best,
-Hong

Hi Hong and Bin,

Thanks for quick response. I am back after a long weekend.

Actually, I am facing another issue with generated MLO file. Generated MLO doesnt work (i.e. no serial output).

Could you provide more explanation how to verify the address "ISW_LOAD_ADDR" passed to the executable ift?

I understand this question may not be relevant to mentioned subject. Kindly let me know if I need to raise another inquiry.

Thanks,

Ganesh

Hi Ganesh,

Yes please open a new E2E thread for the ISW_LOAD_ADDR question, so it will be routed to the corresponding expert for comments.