root@dra7xx-evm:~# lsmod
Module                  Size  Used by
btwilink                3472  0
bluetooth             232598  2 btwilink
6lowpan_iphc            5796  1 bluetooth
omapdrm_pvr           315134  0
m25p80                 14955  0
dwc3_omap               4602  0
root@dra7xx-evm:~# export LIBUSB_DEBUG=9
root@dra7xx-evm:~# lsusb
libusb: 0.000000 error [op_init] could not find usbfs
unable to initialize libusb: -99