1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>snd_ac97_update_bits</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><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="API-snd-ac97-update.html" title="snd_ac97_update"><link rel="next" href="API-snd-ac97-get-short-name.html" title="snd_ac97_get_short_name"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">snd_ac97_update_bits</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-snd-ac97-update.html">Prev</a>&#160;</td><th width="60%" align="center">AC97 Codec API</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-snd-ac97-get-short-name.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-snd-ac97-update-bits"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>snd_ac97_update_bits &#8212; 
2     update the bits on the given register
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">snd_ac97_update_bits </b>(</code></td><td>struct snd_ac97 * <var class="pdparam">ac97</var>, </td></tr><tr><td>&#160;</td><td>unsigned short <var class="pdparam">reg</var>, </td></tr><tr><td>&#160;</td><td>unsigned short <var class="pdparam">mask</var>, </td></tr><tr><td>&#160;</td><td>unsigned short <var class="pdparam">value</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1094686244"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>ac97</code></em></span></dt><dd><p>
4     the ac97 instance
5    </p></dd><dt><span class="term"><em class="parameter"><code>reg</code></em></span></dt><dd><p>
6     the register to change
7    </p></dd><dt><span class="term"><em class="parameter"><code>mask</code></em></span></dt><dd><p>
8     the bit-mask to change
9    </p></dd><dt><span class="term"><em class="parameter"><code>value</code></em></span></dt><dd><p>
10     the value to set
11    </p></dd></dl></div></div><div class="refsect1"><a name="idp1094690908"></a><h2>Description</h2><p>
12   Updates the masked-bits on the given register only when the value
13   is changed.
14</p></div><div class="refsect1"><a name="idp1094691596"></a><h2>Return</h2><p>
15   1 if the bits are changed, 0 if no change, or a negative
16   code on failure.
17</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-snd-ac97-update.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch03s02.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-snd-ac97-get-short-name.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">snd_ac97_update</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">snd_ac97_get_short_name</span></td></tr></table></div></body></html>
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