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Diffstat (limited to 'share/man/man4/snd_maestro3.4')
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diff --git a/share/man/man4/snd_maestro3.4 b/share/man/man4/snd_maestro3.4 new file mode 100644 index 0000000..4fadd04 --- /dev/null +++ b/share/man/man4/snd_maestro3.4 @@ -0,0 +1,94 @@ +.\" Copyright (c) 2001 Scott Long +.\" All rights reserved. +.\" +.\" 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. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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. +.\" +.\" $FreeBSD$ +.\" +.Dd December 15, 2005 +.Dt SND_MAESTRO3 4 +.Os +.Sh NAME +.Nm snd_maestro3 +.Nd "ESS Maestro3/Allegro-1 bridge device driver" +.Sh SYNOPSIS +To compile this driver into the kernel, place the following lines in your +kernel configuration file: +.Bd -ragged -offset indent +.Cd "device sound" +.Cd "device snd_maestro3" +.Ed +.Pp +Alternatively, to load the driver as a module at boot time, place the +following line in +.Xr loader.conf 5 : +.Bd -literal -offset indent +snd_maestro3_load="YES" +.Ed +.Sh DESCRIPTION +The +.Nm +driver provides support for the ESS Maestro3 and Allegro-1 sound chips +under the PCM framework. +These chips are mostly found in laptop computers and feature an AC97 mixer, +a multi-channel sample rate converter that can mix up to four digital audio +streams in hardware, recording support, and external volume control buttons. +.Pp +The firmware for the sound processor is licensed under the GNU Public +License, and thus this driver is not included in the default +.Pa GENERIC +kernel. +.Sh HARDWARE +The +.Nm +driver supports the following audio devices: +.Pp +.Bl -bullet -compact +.It +ESS Technology Allegro-1 +.It +ESS Technology Maestro3 +.El +.Sh DIAGNOSTICS +The hardware volume control buttons can be connected to two different pin +sets (GPIO or GD) on the chip, depending on the manufacturer. +The driver has no way of determining this configuration, so a hint may be +used to override the default guess. +The default setting for hardware volume control assumes that GD pins +are wired to control the hardware volume. +For systems that have the GPIO pins wired to the hardware volume control +buttons, add the line +.Dq Li hint.pcm.0.hwvol_config="0" +to the file +.Pa /boot/device.hints +to override the default setting. +.Sh SEE ALSO +.Xr sound 4 , +.Xr loader.conf 5 +.Sh HISTORY +The +.Nm +driver first appeared in +.Fx 4.3 . +.Sh AUTHORS +.An Scott Long Aq scottl@FreeBSD.org +.An Darrel Anderson Aq anderson@cs.duke.edu |