DaVinci USBHost 1.0
USB Host Guide 1.0
cd into your kernel lsp directory.
Run make menuconfig.
Select drivers -> SCSI.
Enable scsi and enable search multiple LUI option.
Select drivers -> USB.
Enable USB Host Mode.
Enable USB Mass Storage Device option.
Get the kernel onto your board in the usual way.
Make sure the jumper by the USB port is in the right location for HOST mode (check manual).
insert your USB card reader
mount your card using:
mount /dev/sdXX /usbdrive -o sync
where XX = a1, a2, a3, b1 etc..