.\"-
.\" Copyright (c) 2009 Nathan Whitehorn <nwhitehorn@FreeBSD.org>
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.Dd January 20, 2009
.Dt SND_AI2S 4
.Os
.Sh NAME
.Nm snd_ai2s
.Nd "Apple I2S audio 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_ai2s"
.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_ai2s_load="YES"
.Ed
.Sh DESCRIPTION
The
.Nm
driver provides support for the Apple I2S audio controllers found
predominantly in G4 and G5 machines, along with the snapper and tumbler
codecs. Some machines (e.g. the Mac Mini) do not have configurable
codecs and so lack hardware volume control.
.Sh HARDWARE
.Pp
Chips supported by the
.Nm
driver include:
.Pp
.Bl -bullet -compact
.It
Apple Tumbler Audio
.It
Apple Snapper Audio
.El
.Pp
.Sh SEE ALSO
.Xr sound 4 ,
.Xr snd_davbus 4
.Sh HISTORY
The
.Nm
device driver appeared in
.Nx 2.0
and then in
.Fx 8.0 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Tsubai Masanari
.Aq tsubai@netbsd.org ,
and ported to FreeBSD by
.An Marco Trillo
.Aq marcotrillo@gmail.com .
.Sh BUGS
Recording and operation with non-44.1 Khz audio are not currently supported.