This package intentended to provide firmware of Broadcom WIDCOMM® Bluetooth devices (including BCM20702, BCM20703, BCM43142 chipsets and other) for Linux kernel. Since February 2017, Broadcom ships their drivers directly to Windows Update service. They can be downloaded here.
When you inserting Broadcom Bluetooth device you prefered Linux distribution may not load it properly:
Bluetooth: hci1: BCM: chip id 63
Bluetooth: hci1: BCM20702A
Bluetooth: hci1: BCM20702A1 (001.002.014) build 0000
bluetooth hci1: Direct firmware load for brcm/BCM20702A1-0b05-17cb.hcd failed with error -2
Bluetooth: hci1: BCM: Patch brcm/BCM20702A1-0b05-17cb.hcd not found
As you can see, you need brcm/BCM20702A1-0b05-17cb.hcd firmware.
Place required .hcd file to /lib/firmware/brcm. After inserting Broadcom Bluetooth device you will see that firmware successfully loaded:
Bluetooth: hci1: BCM: chip id 63
Bluetooth: hci1: BCM20702A
Bluetooth: hci1: BCM20702A1 (001.002.014) build 0000
Bluetooth: hci1: BCM20702A1 (001.002.014) build 1467
Bluetooth: hci1: Broadcom Bluetooth Device
Congratulations, now your bluetooth device successfully loaded. Now go to Bluez for futher configuration.
Firmware files are licensed under Broadcom WIDCOMM Bluetooth Software License Agreement. Other parts of project are licensed under standard MIT license.
See DEVICES file.