1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>sata_scr_read</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="libATA Developer's Guide"><link rel="up" href="libataExt.html" title="Chapter&#160;4.&#160;libata Library"><link rel="prev" href="API-sata-scr-valid.html" title="sata_scr_valid"><link rel="next" href="API-sata-scr-write.html" title="sata_scr_write"></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">sata_scr_read</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-sata-scr-valid.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;4.&#160;libata Library</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-sata-scr-write.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-sata-scr-read"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>sata_scr_read &#8212; 
2     read SCR register of the specified port
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">sata_scr_read </b>(</code></td><td>struct ata_link * <var class="pdparam">link</var>, </td></tr><tr><td>&#160;</td><td>int <var class="pdparam">reg</var>, </td></tr><tr><td>&#160;</td><td>u32 * <var class="pdparam">val</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1123751060"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>link</code></em></span></dt><dd><p>
4     ATA link to read SCR for
5    </p></dd><dt><span class="term"><em class="parameter"><code>reg</code></em></span></dt><dd><p>
6     SCR to read
7    </p></dd><dt><span class="term"><em class="parameter"><code>val</code></em></span></dt><dd><p>
8     Place to store read value
9    </p></dd></dl></div></div><div class="refsect1"><a name="idp1123754580"></a><h2>Description</h2><p>
10   Read SCR register <em class="parameter"><code>reg</code></em> of <em class="parameter"><code>link</code></em> into *<em class="parameter"><code>val</code></em>.  This function is
11   guaranteed to succeed if <em class="parameter"><code>link</code></em> is ap-&gt;link, the cable type of
12   the port is SATA and the port implements -&gt;scr_read.
13</p></div><div class="refsect1"><a name="idp1123756644"></a><h2>LOCKING</h2><p>
14   None if <em class="parameter"><code>link</code></em> is ap-&gt;link.  Kernel thread context otherwise.
15</p></div><div class="refsect1"><a name="idp1123757652"></a><h2>RETURNS</h2><p>
16   0 on success, negative errno 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-sata-scr-valid.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="libataExt.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-sata-scr-write.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">sata_scr_valid</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">sata_scr_write</span></td></tr></table></div></body></html>
18