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<table class="head">
<tr>
<td class="head-ltitle">SND_VIA8233(4)</td>
<td class="head-vol">Device Drivers Manual</td>
<td class="head-rtitle">SND_VIA8233(4)</td>
</tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<p class="Pp"><code class="Nm">snd_via8233</code> — <span class="Nd">VIA
Technologies VT8233 bridge device driver</span></p>
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<p class="Pp">To compile this driver into the kernel, place the following lines
in your kernel configuration file:</p>
<div class="Bd Pp Bd-indent"><code class="Cd">device sound</code>
<br/>
<code class="Cd">device snd_via8233</code></div>
<p class="Pp">Alternatively, to load the driver as a module at boot time, place
the following line in <a class="Xr">loader.conf(5)</a>:</p>
<div class="Bd Pp Bd-indent Li">
<pre>snd_via8233_load="YES"</pre>
</div>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
<p class="Pp">The <code class="Nm">snd_via8233</code> bridge driver allows the
generic audio driver, <a class="Xr">sound(4)</a>, to attach to the VIA
VT8233 audio devices. These audio chipsets are integrated in the southbridge
on many VIA based motherboards.</p>
<section class="Ss">
<h2 class="Ss" id="Runtime_Configuration"><a class="permalink" href="#Runtime_Configuration">Runtime
Configuration</a></h2>
<p class="Pp">The following <a class="Xr">sysctl(8)</a> variables are available
in addition to those available to all <a class="Xr">sound(4)</a>
devices:</p>
<div class="Bd-indent">
<dl class="Bl-tag">
<dt id="dev.pcm._d.polling"><var class="Va">dev.pcm.%d.polling</var></dt>
<dd>Experimental polling mode, where the driver operates by querying the
device state on each tick using <a class="Xr">callout(9)</a>. Polling is
disabled by default. Do not enable it unless you are facing weird
interrupt problems or if the device cannot generate interrupts at
all.</dd>
</dl>
</div>
</section>
</section>
<section class="Sh">
<h1 class="Sh" id="HARDWARE"><a class="permalink" href="#HARDWARE">HARDWARE</a></h1>
<p class="Pp">The <code class="Nm">snd_via8233</code> driver supports the
following audio chipsets:</p>
<p class="Pp"></p>
<ul class="Bl-bullet Bl-compact">
<li>VIA VT8233</li>
<li>VIA VT8233A</li>
<li>VIA VT8233C</li>
<li>VIA VT8235</li>
<li>VIA VT8237</li>
<li>VIA VT8251</li>
</ul>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
ALSO</a></h1>
<p class="Pp"><a class="Xr">sound(4)</a></p>
</section>
<section class="Sh">
<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
<p class="Pp">The <code class="Nm">snd_via8233</code> device driver first
appeared in <span class="Ux">FreeBSD 4.7</span>.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
<p class="Pp">This manual page was written by <span class="An">Joel Dahl</span>
<<a class="Mt" href="mailto:joel@FreeBSD.org">joel@FreeBSD.org</a>>.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="BUGS"><a class="permalink" href="#BUGS">BUGS</a></h1>
<p class="Pp">The <code class="Nm">snd_via8233</code> driver does not support
S/PDIF. There is partial support in the code, so implementing it should be
fairly easy if the right hardware is available.</p>
</section>
</div>
<table class="foot">
<tr>
<td class="foot-date">November 29, 2006</td>
<td class="foot-os">FreeBSD 15.0</td>
</tr>
</table>
|
