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<HTML
><HEAD
><TITLE
>request_RTirq(3)</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.64
"></HEAD
><BODY
CLASS="REFENTRY"
><H1
><A
NAME="AEN1"
>request_RTirq(3)</A
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN5"
></A
><H2
>Name</H2
>request_RTirq -- install an interrupt handler</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN8"
></A
><H2
>Synopsis</H2
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="SYNOPSIS"
> <I
CLASS="EMPHASIS"
>WARNING</I
> -
This is an RTLinux v1.x compatibility function.
For new programs, please see <TT
CLASS="FUNCTION"
>rtl_request_irq(3)</TT
>.
#define MODULE
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/errno.h>
#include <linux/rtf.h>
#include <asm/rt_irq.h>
int <TT
CLASS="FUNCTION"
>request_RTirq</TT
>(unsigned int <TT
CLASS="PARAMETER"
><I
>irq</I
></TT
>, void <TT
CLASS="FUNCTION"
>(*handler)(void))</TT
>;</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN15"
></A
><H2
>WARNING</H2
><P
>This is an RTLinux v1.x compatibility function.
For new programs, please see <TT
CLASS="FUNCTION"
>rtl_request_irq(3)</TT
>.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN19"
></A
><H2
>DESCRIPTION</H2
><P
><TT
CLASS="FUNCTION"
>request_RTirq</TT
> installs <TT
CLASS="PARAMETER"
><I
>handler</I
></TT
> as an interrupt service routine for IRQ level <TT
CLASS="PARAMETER"
><I
>irq</I
></TT
>. <TT
CLASS="PARAMETER"
><I
>handler</I
></TT
> is then invoked whenever interrupt number <TT
CLASS="PARAMETER"
><I
>irq</I
></TT
> occurs. The interrupt service routine can be uninstalled using free_RTirq.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN27"
></A
><H2
>RETURN VALUE</H2
><P
>On success, 0 is returned. On failure, a negative value is returned as described below.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN30"
></A
><H2
>ERRORS</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
>-EINVAL</DT
><DD
><P
><TT
CLASS="PARAMETER"
><I
>irq</I
></TT
> is not a valid IRQ number, or <TT
CLASS="PARAMETER"
><I
>handler</I
></TT
> is NULL.</P
></DD
><DT
>-EBUSY</DT
><DD
><P
><TT
CLASS="PARAMETER"
><I
>irq</I
></TT
> already has a handler. You must first call <TT
CLASS="FUNCTION"
>free_RTirq</TT
> to make the IRQ available.</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN45"
></A
><H2
>AUTHOR</H2
><P
>Jerry Epplin, modified by Michael Barabanov (<A
HREF="mailto:baraban@fsmlabs.com"
TARGET="_top"
>baraban@fsmlabs.com</A
>)</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN49"
></A
><H2
>SEE ALSO</H2
><A
HREF="free_RTirq.3.html"
TARGET="_top"
>free_RTirq(3)</A
><P
>1997 Jerry Epplin.</P
><P
>Modifications for RTLinux 2.x and 3.x by Michael Barabanov. 2001 FSMLabs Inc.</P
><P
>All rights reserved.</P
></DIV
></BODY
></HTML
>
|
