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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>snd_ac97_bus</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="The ALSA Driver API" /><link rel="up" href="ch03s02.html" title="AC97 Codec API" /><link rel="prev" href="re80.html" title="snd_ac97_get_short_name" /><link rel="next" href="re82.html" title="snd_ac97_mixer" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>snd_ac97_bus</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re80.html">Prev</a> </td><th width="60%" align="center">AC97 Codec API</th><td width="20%" align="right"> <a accesskey="n" href="re82.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="snd_ac97_bus"><a id="API-snd-ac97-bus"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>snd_ac97_bus —
create an AC97 bus component
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">int <b class="fsfunc">snd_ac97_bus </b>(</code></td><td>struct snd_card * <var class="pdparam">card</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">num</var>, </td></tr><tr><td> </td><td>struct snd_ac97_bus_ops * <var class="pdparam">ops</var>, </td></tr><tr><td> </td><td>void * <var class="pdparam">private_data</var>, </td></tr><tr><td> </td><td>struct snd_ac97_bus ** <var class="pdparam">rbus</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2715015"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>card</code></em></span></dt><dd><p>
the card instance
</p></dd><dt><span class="term"><em class="parameter"><code>num</code></em></span></dt><dd><p>
the bus number
</p></dd><dt><span class="term"><em class="parameter"><code>ops</code></em></span></dt><dd><p>
the bus callbacks table
</p></dd><dt><span class="term"><em class="parameter"><code>private_data</code></em></span></dt><dd><p>
private data pointer for the new instance
</p></dd><dt><span class="term"><em class="parameter"><code>rbus</code></em></span></dt><dd><p>
the pointer to store the new AC97 bus instance.
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2715108"></a><h2>Description</h2><p>
Creates an AC97 bus component. An struct snd_ac97_bus instance is newly
allocated and initialized.
</p><p>
The ops table must include valid callbacks (at least read and
write). The other callbacks, wait and reset, are not mandatory.
</p><p>
The clock is set to 48000. If another clock is needed, set
(*rbus)->clock manually.
</p><p>
The AC97 bus instance is registered as a low-level device, so you don't
have to release it manually.
</p><p>
Returns zero if successful, or a negative error code on failure.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re80.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch03s02.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re82.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>snd_ac97_get_short_name</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>snd_ac97_mixer</span></td></tr></table></div></body></html>
