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-.\" $OpenBSD: btsco.4,v 1.3 2010/09/19 12:49:37 jmc Exp $
-.\" $NetBSD: btsco.4,v 1.9 2006/10/04 19:29:25 wiz Exp $
-.\"
-.\" Copyright (c) 2006 Itronix Inc.
-.\" All rights reserved.
-.\"
-.\" Written by Iain Hibbert for Itronix Inc.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. The name of Itronix Inc. may not be used to endorse
-.\"    or promote products derived from this software without specific
-.\"    prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
-.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-.\" ON ANY THEORY OF LIABILITY, WHETHER IN
-.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-.\" POSSIBILITY OF SUCH DAMAGE.
-.\"
-.Dd $Mdocdate: September 19 2010 $
-.Dt BTSCO 4
-.Os
-.Sh NAME
-.Nm btsco
-.Nd Bluetooth SCO Audio
-.Sh SYNOPSIS
-.Cd "btsco*	at bthub?"
-.Cd "audio*	at audiobus?"
-.Sh DESCRIPTION
-.Nm
-provides support for Bluetooth SCO Audio devices through the
-.Xr audio 4
-driver.
-.Nm
-is configured at run time with the
-btdevctl program.
-.Pp
-The following properties are used by
-.Nm
-during autoconfiguration:
-.Bl -tag -width Ds
-.It local-bdaddr
-Local device address.
-.It remote-bdaddr
-Remote device address.
-.It service-name
-.Nm
-matches the
-.Sq HF
-and
-.Sq HSET
-services.
-For the
-.Sq HF
-service, the
-.Nm
-device will, on
-.Xr open 2 ,
-listen for incoming connections from the remote device.
-Otherwise,
-.Nm
-will attempt to initiate a connection to the remote device.
-.It rfcomm-channel
-This integer value is not used directly, but will be stored and
-passed via the
-.Dv BTSCO_INFO
-ioctl as shown below.
-.El
-.Pp
-SCO connections require a baseband connection between the two devices before
-they can be created.
-.Nm
-does not create this, but can provide information to facilitate
-an application setting up a control channel prior to use, via the
-.Dv BTSCO_INFO
-.Xr ioctl 2
-call on the mixer device, which returns a
-.Ar btsco_info
-structure as follows:
-.Bd -literal -offset 3n
-#include <dev/bluetooth/btsco.h>
-
-struct btsco_info {
-	bdaddr_t	laddr;		/* controller bdaddr */
-	bdaddr_t	raddr;		/* headset bdaddr */
-	uint8_t		channel;	/* RFCOMM channel */
-	int		vgs;		/* mixer index speaker */
-	int		vgm;		/* mixer index mic */
-};
-
-#define BTSCO_INFO	_IOR('b', 16, struct btsco_info)
-.Ed
-.Pp
-.Nm
-can be configured to act in Connect or Listen mode.
-In Connect mode,
-it will initiate a connection to the remote device on an
-.Xr open 2
-call, whereas in Listen mode
-.Xr open 2
-will block until the remote device initiates the connection.
-.Sh SEE ALSO
-.Xr ioctl 2 ,
-.Xr audio 4 ,
-.Xr bluetooth 4
-.Sh HISTORY
-The
-.Nm
-driver
-was written for
-.Nx 4.0
-by
-.An Iain Hibbert
-under the sponsorship of Itronix, Inc.
-.Sh BUGS
-.Nm
-takes no notice of the HCI Voice Setting in the Bluetooth controller,
-and must be 0x0060 (the default)
-as alternate values are currently unsupported.