1<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>__parport_register_driver</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Device Drivers"><link rel="up" href="parportdev.html" title="Chapter 3. Parallel Port Devices"><link rel="prev" href="API-parport-set-timeout.html" title="parport_set_timeout"><link rel="next" href="API-parport-unregister-driver.html" title="parport_unregister_driver"></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">__parport_register_driver</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-parport-set-timeout.html">Prev</a> </td><th width="60%" align="center">Chapter 3. Parallel Port Devices</th><td width="20%" align="right"> <a accesskey="n" href="API-parport-unregister-driver.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API---parport-register-driver"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>__parport_register_driver — 2 register a parallel port device driver 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">__parport_register_driver </b>(</code></td><td>struct parport_driver * <var class="pdparam">drv</var>, </td></tr><tr><td> </td><td>struct module * <var class="pdparam">owner</var>, </td></tr><tr><td> </td><td>const char * <var class="pdparam">mod_name</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="id-1.5.10.5"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>drv</code></em></span></dt><dd><p> 4 structure describing the driver 5 </p></dd><dt><span class="term"><em class="parameter"><code>owner</code></em></span></dt><dd><p> 6 owner module of drv 7 </p></dd><dt><span class="term"><em class="parameter"><code>mod_name</code></em></span></dt><dd><p> 8 module name string 9 </p></dd></dl></div></div><div class="refsect1"><a name="id-1.5.10.6"></a><h2>Description</h2><p> 10 This can be called by a parallel port device driver in order 11 to receive notifications about ports being found in the 12 system, as well as ports no longer available. 13 </p><p> 14 15 If devmodel is true then the new device model is used 16 for registration. 17 </p><p> 18 19 The <em class="parameter"><code>drv</code></em> structure is allocated by the caller and must not be 20 deallocated until after calling <code class="function"><a class="link" href="API-parport-unregister-driver.html" title="parport_unregister_driver">parport_unregister_driver</a></code>. 21</p></div><div class="refsect1"><a name="id-1.5.10.7"></a><h2>If using the non device model</h2><p> 22 The driver's <code class="function">attach</code> function may block. The port that 23 <code class="function">attach</code> is given will be valid for the duration of the 24 callback, but if the driver wants to take a copy of the 25 pointer it must call <code class="function"><a class="link" href="API-parport-get-port.html" title="parport_get_port">parport_get_port</a></code> to do so. Calling 26 <code class="function"><a class="link" href="API-parport-register-device.html" title="parport_register_device">parport_register_device</a></code> on that port will do this for you. 27 </p><p> 28 29 The driver's <code class="function">detach</code> function may block. The port that 30 <code class="function">detach</code> is given will be valid for the duration of the 31 callback, but if the driver wants to take a copy of the 32 pointer it must call <code class="function"><a class="link" href="API-parport-get-port.html" title="parport_get_port">parport_get_port</a></code> to do so. 33 </p><p> 34 35 </p><p> 36 37 Returns 0 on success. The non device model will always succeeds. 38 but the new device model can fail and will return the error code. 39</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-parport-set-timeout.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="parportdev.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-parport-unregister-driver.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">parport_set_timeout</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span class="phrase">parport_unregister_driver</span></td></tr></table></div></body></html> 40