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wiz 2006-08-20 00:30:02 +00:00
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commit 09a207d68f
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34
share/man/man4/ubt.4
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@ -1,4 +1,4 @@
.\" $NetBSD: ubt.4,v 1.2 2006/08/19 16:35:02 plunky Exp $
.\" $NetBSD: ubt.4,v 1.3 2006/08/20 00:30:02 wiz Exp $
.\"
.\" Copyright (c) 2006 Itronix Inc.
.\" All rights reserved.
@ -29,7 +29,7 @@
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd Apr 20, 2005
.Dd August 19, 2006
.Dt UBT 4
.Os
.Sh NAME
@ -45,19 +45,22 @@ to the Bluetooth protocol stack.
.Pp
USB Bluetooth dongles provide two interfaces, both of which the
.Nm
driver claims. The second interface is used for Isochronous data and will have
several alternate configurations regarding bandwidth consumption, which can be
set using the hw.ubtN.config
.Xr sysctl 8
variable. The number of alternate configurations is indicated by the value
driver claims.
The second interface is used for Isochronous data and will have
several alternate configurations regarding bandwidth consumption,
which can be set using the hw.ubtN.config
.Xr sysctl 8
variable.
The number of alternate configurations is indicated by the value
in the hw.ubtN.alt_config variable, and the isoc frame size for the current
configuration is shown in the hw.ubtN.sco_rxsize, and hw.ubtN.sco_txsize
configuration is shown in the hw.ubtN.sco_rxsize and hw.ubtN.sco_txsize
variables.
.Pp
By default, configuration 0 is selected, which means that no bandwidth
is used on the Isochronous interface and no SCO data can be sent. Consult
the Bluetooth USB specification at https://www.bluetooth.org/ for complete
instructions on setting bandwidth consumption. The following extract may be
is used on the Isochronous interface and no SCO data can be sent.
Consult the Bluetooth USB specification at https://www.bluetooth.org/
for complete instructions on setting bandwidth consumption.
The following extract may be
useful as a general guidance though details may differ between manufacturers.
.Pp
.Bl -tag -compact -width XXX
@ -66,7 +69,8 @@ No active voice channels
.It 1
One voice channel with 8-bit encoding
.It 2
Two voice channels with 8-bit encoding, or One voice channel with 16-bit encoding.
Two voice channels with 8-bit encoding, or one voice channel with
16-bit encoding.
.It 3
Three voice channels with 8-bit encoding
.It 4
@ -82,13 +86,13 @@ Three voice channels with 16-bit encoding
This
.Nm
device driver was originally a character device written by
.An "David Sainty"
.An David Sainty
and
.An "Lennart Augustsson" .
.An Lennart Augustsson .
It was rewritten to support socket based Bluetooth access for
.Nx 4.0
by
.An "Iain Hibbert" .
.An Iain Hibbert .
.Sh BUGS
The Isochronous configuration can only be changed when the device is not
marked up.