2001-10-15 04:23:38 +00:00
|
|
|
.\" 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.
|
|
|
|
.\"
|
|
|
|
.\" $FreeBSD$
|
|
|
|
.\"
|
2004-12-14 16:17:12 +00:00
|
|
|
.Dd December 14, 2004
|
2004-09-08 08:28:02 +00:00
|
|
|
.Dt SND_MAESTRO3 4
|
2001-10-15 04:23:38 +00:00
|
|
|
.Os
|
|
|
|
.Sh NAME
|
2004-09-08 08:28:02 +00:00
|
|
|
.Nm snd_maestro3
|
2004-12-14 16:17:12 +00:00
|
|
|
.Nd "ESS Maestro3/Allegro-1 bridge device driver"
|
2001-10-15 04:23:38 +00:00
|
|
|
.Sh SYNOPSIS
|
2004-09-08 08:28:02 +00:00
|
|
|
.Cd "device sound"
|
|
|
|
.Cd "device snd_maestro3"
|
2001-10-15 04:23:38 +00:00
|
|
|
.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
|
2001-11-21 17:12:31 +00:00
|
|
|
License, and thus this driver is not included in the default
|
|
|
|
.Pa GENERIC
|
2004-12-14 16:17:12 +00:00
|
|
|
kernel.
|
2001-10-15 04:23:38 +00:00
|
|
|
A convenient way to automatically load the driver is to add the line
|
2001-11-21 17:12:31 +00:00
|
|
|
.Pp
|
|
|
|
.Dl snd_maestro3_load="YES"
|
|
|
|
.Pp
|
2001-10-15 04:23:38 +00:00
|
|
|
to the file
|
|
|
|
.Pa /boot/loader.conf .
|
2004-12-14 16:17:12 +00:00
|
|
|
.Sh HARDWARE
|
|
|
|
The
|
|
|
|
.Nm
|
|
|
|
driver supports the following audio devices:
|
|
|
|
.Pp
|
|
|
|
.Bl -bullet -compact
|
|
|
|
.It
|
|
|
|
ESS Technology Allegro-1
|
|
|
|
.It
|
|
|
|
ESS Technology Maestro3
|
|
|
|
.El
|
2001-10-15 04:23:38 +00:00
|
|
|
.Sh DIAGNOSTICS
|
|
|
|
The hardware volume control buttons can be connected to two different pin
|
2005-06-08 05:23:39 +00:00
|
|
|
sets(GPIO or GD) on the chip, depending on the manufacturer.
|
2001-10-15 04:23:38 +00:00
|
|
|
The driver has no way of determining this configuration, so a hint may be
|
|
|
|
used to override the default guess.
|
2005-06-08 05:23:39 +00:00
|
|
|
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
|
2001-10-15 04:23:38 +00:00
|
|
|
.Dq Li hint.pcm.0.hwvol_config="0"
|
|
|
|
to the file
|
|
|
|
.Pa /boot/device.hints
|
|
|
|
to override the default setting.
|
|
|
|
.Sh SEE ALSO
|
2004-09-08 08:28:02 +00:00
|
|
|
.Xr sound 4 ,
|
2001-10-15 04:23:38 +00:00
|
|
|
.Xr loader.conf 5
|
|
|
|
.Sh HISTORY
|
|
|
|
The
|
|
|
|
.Nm
|
|
|
|
driver first appeared in
|
|
|
|
.Fx 4.3 .
|
|
|
|
.Sh AUTHORS
|
2001-11-21 17:12:31 +00:00
|
|
|
.An Scott Long Aq scottl@FreeBSD.org
|
|
|
|
.An Darrel Anderson Aq anderson@cs.duke.edu
|