<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <HTML ><HEAD ><TITLE >parport_open</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="The Linux 2.4 Parallel Port Subsystem" HREF="book1.html"><LINK REL="UP" TITLE=" Linux parallel port driver API reference " HREF="a950.html"><LINK REL="PREVIOUS" TITLE="parport_unregister_device" HREF="r1428.html"><LINK REL="NEXT" TITLE="parport_close" HREF="r1533.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >The Linux 2.4 Parallel Port Subsystem</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="r1428.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="r1533.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="AEN1455" ></A ><SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >parport_open</SPAN ></SPAN ></H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN1459" ></A ><H2 >Name</H2 >parport_open -- find a device by canonical device number </DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN1462" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN1464" ></A ><P ></P ><P ><CODE ><CODE CLASS="FUNCDEF" >struct pardevice * <TT CLASS="FUNCTION" >parport_open </TT ></CODE >(int <TT CLASS="PARAMETER" ><I >devnum</I ></TT >, const char * <TT CLASS="PARAMETER" ><I >name</I ></TT >, int (*<TT CLASS="PARAMETER" ><I >pf</I ></TT >) (void *), void (*<TT CLASS="PARAMETER" ><I >kf</I ></TT >) (void *), void (*<TT CLASS="PARAMETER" ><I >irqf</I ></TT >) (int, void *, struct pt_regs *), int <TT CLASS="PARAMETER" ><I >flags</I ></TT >, void * <TT CLASS="PARAMETER" ><I >handle</I ></TT >);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN1485" ></A ><H2 >Arguments</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="PARAMETER" ><I >devnum</I ></TT ></DT ><DD ><P > canonical device number </P ></DD ><DT ><TT CLASS="PARAMETER" ><I >name</I ></TT ></DT ><DD ><P > name to associate with the device </P ></DD ><DT ><TT CLASS="PARAMETER" ><I >pf</I ></TT ></DT ><DD ><P > preemption callback </P ></DD ><DT ><TT CLASS="PARAMETER" ><I >kf</I ></TT ></DT ><DD ><P > kick callback </P ></DD ><DT ><TT CLASS="PARAMETER" ><I >irqf</I ></TT ></DT ><DD ><P > interrupt handler </P ></DD ><DT ><TT CLASS="PARAMETER" ><I >flags</I ></TT ></DT ><DD ><P > registration flags </P ></DD ><DT ><TT CLASS="PARAMETER" ><I >handle</I ></TT ></DT ><DD ><P > driver data </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN1523" ></A ><H2 >Description</H2 ><P > This function is similar to <TT CLASS="FUNCTION" >parport_register_device</TT >, except that it locates a device by its number rather than by the port it is attached to. See <TT CLASS="FUNCTION" >parport_find_device</TT > and <TT CLASS="FUNCTION" >parport_find_class</TT >. </P ><P > All parameters except for <TT CLASS="PARAMETER" ><I >devnum</I ></TT > are the same as for <TT CLASS="FUNCTION" >parport_register_device</TT >. The return value is the same as for <TT CLASS="FUNCTION" >parport_register_device</TT >. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="r1428.html" ACCESSKEY="P" ><<< Previous</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="book1.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="r1533.html" ACCESSKEY="N" >Next >>></A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >parport_unregister_device</SPAN ></SPAN ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="a950.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><SPAN CLASS="phrase" ><SPAN CLASS="PHRASE" >parport_close</SPAN ></SPAN ></TD ></TR ></TABLE ></DIV ></BODY ></HTML >