[U-Boot] at91sam9g20 sd card boot

Greetings,

Is there a framework in place for using U-Boot to boot Linux from an SD Card on an at91sam9g20 processor?

I've been reading through the code and found at a minimum, I would need to enable the mmc command and the atmel_mci library. Then the mmc commands exist in the console but mmcinfo does nothing. Am I looking in the right place to get this functional?

Thank you,

Rob