1.\" $NetBSD: uaudio.4,v 1.15 2002/02/12 19:53:57 jdolecek Exp $
2.\"
3.\" Copyright (c) 1999 The NetBSD Foundation, Inc.
4.\" All rights reserved.
5.\"
6.\" This code is derived from software contributed to The NetBSD Foundation
7.\" by Lennart Augustsson.
8.\"
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22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28.\" POSSIBILITY OF SUCH DAMAGE.
29.\"
30.\" $FreeBSD: head/share/man/man4/snd_uaudio.4 204605 2010-03-02 21:59:03Z joel $
31.\"
32.Dd December 15, 2005
33.Dt SND_UAUDIO 4
34.Os
35.Sh NAME
36.Nm snd_uaudio
37.Nd USB audio device driver
38.Sh SYNOPSIS
39To compile this driver into the kernel, place the following lines in your
40kernel configuration file:
41.Bd -ragged -offset indent
42.Cd "device sound"
43.Cd "device usb"
44.Cd "device snd_uaudio"
45.Ed
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50.Bd -literal -offset indent
51snd_uaudio_load="YES"
52.Ed
53.Sh DESCRIPTION
54The
55.Nm
56driver provides support for
57.Tn USB
58audio class devices.
59.Pp
60A
61.Tn USB
62audio device consists of a number of components:
63input terminals (e.g.\& USB digital input), output terminals (e.g.\&
64speakers), and a number of units in between (e.g.\& volume control).
65.Pp
66Refer to the
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89The
90.Tn PCM
91framework in
92.Fx ,
93as of this writing, does not handle device un-registrations in a properly
94abstracted manner, i.e., a detach request is refused by the
95.Tn PCM
96framework if the device is in use.
97For
98.Tn USB
99and supposedly other detach-able busses, it is necessary to allow the
100device un-registration to complete successfully, otherwise the driver
101leaves wild pointers to invalid data structures and thus leading to a panic.
2.\"
3.\" Copyright (c) 1999 The NetBSD Foundation, Inc.
4.\" All rights reserved.
5.\"
6.\" This code is derived from software contributed to The NetBSD Foundation
7.\" by Lennart Augustsson.
8.\"
--- 13 unchanged lines hidden (view full) ---
22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28.\" POSSIBILITY OF SUCH DAMAGE.
29.\"
30.\" $FreeBSD: head/share/man/man4/snd_uaudio.4 204605 2010-03-02 21:59:03Z joel $
31.\"
32.Dd December 15, 2005
33.Dt SND_UAUDIO 4
34.Os
35.Sh NAME
36.Nm snd_uaudio
37.Nd USB audio device driver
38.Sh SYNOPSIS
39To compile this driver into the kernel, place the following lines in your
40kernel configuration file:
41.Bd -ragged -offset indent
42.Cd "device sound"
43.Cd "device usb"
44.Cd "device snd_uaudio"
45.Ed
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50.Bd -literal -offset indent
51snd_uaudio_load="YES"
52.Ed
53.Sh DESCRIPTION
54The
55.Nm
56driver provides support for
57.Tn USB
58audio class devices.
59.Pp
60A
61.Tn USB
62audio device consists of a number of components:
63input terminals (e.g.\& USB digital input), output terminals (e.g.\&
64speakers), and a number of units in between (e.g.\& volume control).
65.Pp
66Refer to the
--- 22 unchanged lines hidden (view full) ---
89The
90.Tn PCM
91framework in
92.Fx ,
93as of this writing, does not handle device un-registrations in a properly
94abstracted manner, i.e., a detach request is refused by the
95.Tn PCM
96framework if the device is in use.
97For
98.Tn USB
99and supposedly other detach-able busses, it is necessary to allow the
100device un-registration to complete successfully, otherwise the driver
101leaves wild pointers to invalid data structures and thus leading to a panic.