[Bluez-users] Bluetooth 1.2 and HID Proxy

[Marcel Holtmann <marcel@holtmann.org>]

Hi Folks,

for everyone of you who is searching for a Bluetooth 1.2 capable USB
dongle or a dongle with HID Proxy support, there is now a way to getting
one with a minimum of costs. It is possible through the update efforts
of Apple. Before they equiped their machines with internal Bluetooth
adapters they sold (and I think still sell) a USB dongle from D-Link.
According to Apple every D-Link with hardware revision B2 and higher can
be updated through their firmware updater

http://www.apple.com/downloads/macosx/apple/bluetoothfirmwareupdater.html

So I bought myself a D-Link (Rev B3) and tried it. I used the DFU wizard
from CSR and after some time I got the new firmware on the dongle

hci0:   Type: USB
        BD Address: 00:0D:88:xx:xx:xx ACL MTU: 192:8  SCO MTU: 64:8
        UP RUNNING PSCAN ISCAN 
        RX bytes:966 acl:0 sco:0 events:25 errors:0
        TX bytes:333 acl:0 sco:0 commands:24 errors:0
        Features: 0xff 0xff 0x8f 0x78 0x18 0x18 0x00 0x80
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 
        Link policy: RSWITCH HOLD SNIFF PARK 
        Link mode: SLAVE ACCEPT 
        Name: 'D-Link DBT-120 (Rev B3)'
        Class: 0x1c010c
        Service Classes: Rendering, Capturing, Object Transfer
        Device Class: Computer, Laptop
        HCI Ver: 1.2 (0x2) HCI Rev: 0x4d9 LMP Ver: 1.2 (0x2) LMP Subver: 0x4d9
        Manufacturer: Cambridge Silicon Radio (10)

And now this dongle is not only capable of Bluetooth 1.2 it also uses
the HID Proxy feature. The HID mode is the default boot mode and you
need to use hid2hci to switch between the modes.

The bad news are that you must extract the file GenericCSR.dfu from the
Apple firmware update. Actually that is impossible without using Mac OS.
And the other problem is that you need a DFU Upgrade utility. The CSR
one is not for free and I never really finished the download code for
btdfu. Right now I don't know how to get these two thinks worked out.

Regards

Marcel




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