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From: Maksim Yevmenkin <maksim.yevmenkin@savvis.net>
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Cc: freebsd-bluetooth@freebsd.org, Frank Baro <frankbaro@gmx.de>
Subject: Re: bluetooth-headset ?
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[...]

>>> have a ericson bluetooth-headset and want use it with FBSD-5.3 ,
>>> for SKYPE and so.... but will it work .... u know something about
>>> that ??
>> 
>> unfortunately, no. bluetooth headsets are not currently supported.
>> 
>>> when not .... ---> FBSD-5.4 ??
>> 
>> still not supported, even in -current.
> 
> What would be needed for this? Some kind of fake /dev/dsp device
> which connects to a bluetooth audio channel?

the first thing is bluetooth sco links support. for bluetooth usb 
devices sco data go through usb isochronous transfers. i could not get 
usb isochronous transfers to work on freebsd with my usb bluetooth 
devices. as soon as i open isochronous pipe and submit read transfer it 
immediately comes back with zero bytes of data. i also tried to modify 
ugen(4) driver, but i got the same results. at this point i'm not sure 
where the problem is: my code or bluetooth hardware.

once sco link support is in place then we can talk about integration 
into freebsd sound subsystem.

thanks,
max