NetBSD/share/man/man4/cmpci.4

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.\" $NetBSD: cmpci.4,v 1.8 2008/04/30 13:10:53 martin Exp $
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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Takuya SHIOZAKI <AoiMoe@imou.to> .
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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by ITOH Yasufumi.
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.Dd June 22, 2005
.Dt CMPCI 4
.Os
.Sh NAME
.Nm cmpci
.Nd C-Media CMI8x38 audio device driver
.Sh SYNOPSIS
.Cd "cmpci* at pci? dev ? function ?"
.Cd "audio* at audiobus?"
.Cd "mpu* at cmpci?"
.Cd "opl* at cmpci? flags 1"
.Sh DESCRIPTION
The
.Nm
device driver supports C-Media CMI8x38 based sound cards.
.Pp
The device has
SPDIF input/output interfaces,
16bit CODEC with analog mixer,
OPL3 FM Synthesizer,
and MPU401 compatible MIDI I/O port interface.
.Sh MIXER DEVICE
The mixer device of
.Nm
driver can be accessed via
.Xr mixerctl 1
command.
The complex structure is analyzed as follows.
.Bd -literal
SPDIF in ----------------------
#1(coax)-\*[Gt]|spdin1 | R -----------------------
#2(opt)--\*[Gt]|spdin2 spdif.input |--*-\*[Gt]--|spdin spdif.output |--\*[Gt] SPDIF
--\*[Gt]|spdout | | --\*[Gt]|playback | output
| ---------------------- | | -----------------------
--------------------\*[Lt]------+-*
---------\*[Lt]-------------------+-+----------------------------------
| ------------------------ | | ----------------------- |
--\*[Gt]|legacy spdif.output. |--+-*--\*[Gt]|spdout | |
--\*[Gt]|wave playback | -----\*[Gt]|spdin spdif.monitor |---- |
| ------------------------ NC-|off | | |
---------\*[Lt]-- spdif ----------------------- | |
-------+------- dac ------------ ----------------- v |
wave --\*[Gt]|playback.mode|----\*[Gt]|inputs.dac|-*-\*[Gt]|inputs.dac.mute|-\*[Gt]----- |
playback --------------- ------------ R ----------------- | + | |
----------------- --------------------- |mix| |
FM synthesizer --\*[Gt]|inputs.fmsynth |--*-\*[Gt]|inputs.fmsynth.mute|--\*[Gt]----- |
----------------- R --------------------- *-\*[Gt]--
CD ---------------------- --------------------------- v
LINE-IN -\*[Gt]|inputs.{cd,line,aux}|-*\*[Gt]|inputs.{cd,line,aux}.mute|-\*[Gt]-----
AUX ---------------------- R --------------------------- | |
------------------ | |
PC-SPK --\*[Gt]| inputs.speaker |-----------------------------------\*[Gt]| + |
------------------ | |
------------------- ------------ ----------------- |mix|
MIC --*--\*[Gt]|inputs.mic.preamp|-\*[Gt]|inputs.mic|-\*[Gt]|inputs.mic.mute|-\*[Gt]| |
| ------------------- ------------ ----------------- -----
| ------------ ----------------- |
---\*[Gt]|record.mic|--\*[Gt]| | v
------------ | record.source |--\*[Gt]to -----------
*R--\*[Gt]| (select, mix) | recording |outputs.*|--\*[Gt]
----------------- ----------- SPK
(front)
.Ed
.Pp
Note the 2nd SPDIF input exists only on CMI8738/PCI-6ch versions.
.Sh MIXER EXAMPLES
Here are examples about wave playback and SPDIF input/output ports.
.Bl -tag -width 1n
.It Playback to speaker, SPDIF input to SPDIF output
.Dl mixerctl -w playback.mode=dac spdif.output=spdin spdif.monitor=off
.It Playback to SPDIF output, SPDIF input to speaker
.Dl mixerctl -w playback.mode=spdif spdif.output=playback spdif.output.playback=wave spdif.monitor=spdin
.It SPDIF input to both SPDIF output and speaker
.Dl mixerctl -w spdif.output=spdin spdif.monitor=spdin
.It Playback to both SPDIF output and speaker
.Dl mixerctl -w playback.mode=spdif spdif.output=playback spdif.output.playback=wave spdif.monitor=spdout
.It Mix playback and SPDIF input to speaker
.Dl mixerctl -w playback.mode=dac spdif.monitor=spdin
.El
.Sh SEE ALSO
.Xr mixerctl 1 ,
.Xr audio 4 ,
.Xr midi 4 ,
.Xr mpu 4 ,
.Xr opl 4 ,
.Xr pci 4
.Sh HISTORY
The
.Nm
device driver appeared in
.Nx 1.5 .
.Sh BUGS
4ch/6ch playback is not yet available.
Joystick port is not supported.
.Pp
.Dv spdif.output.playback=legacy
does not seem to work properly.