The Texas specific initialization code sends HCI commands over the
bluetooth socket, but does not bring up the device. This gives these
errors when running "hciattach /dev/ttyUSB0 texas":
Found a Texas Instruments' chip!
Firmware file : /lib/firmware/TIInit_XX.Y.ZZ.bts
Loaded BTS script version 1
Cannot send hci command to socket: Network is down
Can't initialize device: Network is down