Using the Neo as an USB Mass storage device
Make the Neo FreeRunner act as a mass storage device
To access the microSD card in the Freerunner from the host computer as if it were a USB key or memory stick, the following script can be used:
#!/bin/sh ifdown usb0 umount /media/card rmmod g_ether modprobe g_file_storage file=/dev/mmcblk0p1
The card is not accessible from the Freerunner in this mode.
Make the Neo FreeRunner revert to USB networking
The following script can be used:
#!/bin/sh rmmod g_file_storage mount /dev/mmcblk0p1 /media/card modprobe g_ether ifup usb0
Be sure to properly unmount on the host computer first, just as you would with any other USB storage.
Is it possible to pretend to be a USB hub, providing both g_ether and g_file_storage?
Not yet. At the moment it's one gadget driver at a time, but there is a project under way to allow use of multiple gadget drivers together. See this blog posting called 'USB Composite Gadget Framework' or Linux-USB Gadget API Framework