What:		/config/usb-gadget/gadget/functions/midi.name
Date:		Nov 2014
KernelVersion:	3.19
Description:
		The attributes:

		index		- index value for the USB MIDI adapter
		id		- ID string for the USB MIDI adapter
		buflen		- MIDI buffer length
		qlen		- USB read request queue length
		in_ports	- number of MIDI input ports
		out_ports	- number of MIDI output ports