24013109f5
device and module naming. The following files were repo-copied: csa.4 -> snd_csa.4 gusc.4 -> snd_gusc.4 maestro3.4 -> snd_maestro3.4 sbc.4 -> snd_sbc.4 uaudio.4 -> snd_uaudio.4 The pcm(4) manpage wasn't renamed to sound(4) as there are nearby plans to rename "device sound" to "device snd", to address the ambiguity in naming, so pcm.4 is linked to sound.4 for the moment. (We also mumble something about the future plans in the manpage.) Removed links from pcm.4 to als4000.4 and emu10k1.4 -- they now have their own snd_*.4 manpages. Fixes for recent snd_*.4 manpages: added missing "device sound" to the SYNOPSIS, fixed hints (they are still "hint.pcm.<unit>" in most cases). MT5 after: 3 days
78 lines
2.8 KiB
Groff
78 lines
2.8 KiB
Groff
.\" Copyright (c) 2001 Scott Long
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd August 28, 2004
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.Dt SND_MAESTRO3 4
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.Os
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.Sh NAME
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.Nm snd_maestro3
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.Nd FreeBSD audio sub-driver for ESS Maestro3/Allegro-1 hardware
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.Sh SYNOPSIS
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.Cd "device sound"
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.Cd "device snd_maestro3"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for the ESS Maestro3 and Allegro-1 sound chips
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under the PCM framework.
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These chips are mostly found in laptop computers and feature an AC97 mixer,
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a multi-channel sample rate converter that can mix up to four digital audio
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streams in hardware, recording support, and external volume control buttons.
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.Pp
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The firmware for the sound processor is licensed under the GNU Public
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License, and thus this driver is not included in the default
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.Pa GENERIC
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kernel, nor is it compiled into the kernel when
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.Cd "device sound"
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is specified in the kernel config file.
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A convenient way to automatically load the driver is to add the line
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.Pp
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.Dl snd_maestro3_load="YES"
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.Pp
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to the file
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.Pa /boot/loader.conf .
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.Sh DIAGNOSTICS
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The hardware volume control buttons can be connected to two different pin
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sets on the chip, depending on the manufacturer.
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The driver has no way of determining this configuration, so a hint may be
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used to override the default guess.
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Add the line
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.Dq Li hint.pcm.0.hwvol_config="0"
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to the file
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.Pa /boot/device.hints
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to override the default setting.
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.Sh SEE ALSO
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.Xr sound 4 ,
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.Xr loader.conf 5
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 4.3 .
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.Sh AUTHORS
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.An Scott Long Aq scottl@FreeBSD.org
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.An Darrel Anderson Aq anderson@cs.duke.edu
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