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[Derrik Pates <1065400@xxxxxxxxxxxxxxxxxx>]

I had this same issue with an IOGear USB Bluetooth 4.0 adapter:

Bus 006 Device 019: ID 0a5c:21e8 Broadcom Corp.

I built and installed the brcm_patchram_plus_usb tool, used hex2hcd to
convert the firmware (extracted from the driver CD included with the
adapter - first time I've used one of those in awhile), and it made my
HSP profile Bluetooth headset work (a Plantronics Discovery 975) where I
only got silence before. Guessing this device's ID needs to be added to
the kernel as well. I did drop the firmware file into my /lib/firmware
directory as fw-0a5c_21e8.hcd as well. I'm running Mint 15 (based on
raring).

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https://bugs.launchpad.net/bugs/1065400

Title:
  Support for loading Broadcom bluetooth firmware

Status in “linux” package in Ubuntu:
  In Progress
Status in “linux” source package in Precise:
  Fix Released
Status in “linux” source package in Quantal:
  Fix Released
Status in “linux” source package in Raring:
  Fix Released

Bug description:
  Broadcom bluetooth chips require a tool called patchram uploader [1]
  to load firmware. This applies to at least BCM20702 and BCM43142.
  Although some of the devices have an OTPROM that contains required
  firmware, but it is found that these devices would not have HFP/HSP
  support unless a upgraded firmware is loaded via patchram uploader.

  This tool requires hci device to do the firmware loading, but this may
  cause some race condition between patchram tool and bluetoothd or
  something that also works on hci interface.

  Also it needs some hooks to make firmware loads after bootup, s3,  s4,
  rfkill, and device hotplug events. Implement this loader in kernel
  module would make things more easier.

  [1] http://marc.info/?l=linux-bluetooth&m=132039175324993&w=2

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