[PATCH] handsfree profile plugins and driver framework

[Zhang, Zhenhua]

Hi,

Attached patch is the Bluetooth handsfree profile (HFP) support for oFono. It
includes hfp plugin and the basic driver backend framework. The plugin use
'AT+BRSF=118' to inform AG supported features and perform serivce level 
connection in modem's power on stage. The voicecall driver for HFP is planed
to add later. Handsfree profile actually need BlueZ support for SCO connection
for routing audio which is not in this patch.

You may need to create /dev/rfcomm0 through 'rfcomm bind <port> <bdaddr>
<channel>' and then specify device in modem.conf. For example,
    rfcomm bind 0 00:22:A9:8C:AF:34 2

The channel number of HFP audio gateway could be found though 'sdptool browse'
result.

Regards,
Zhenhua
 
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