107 lines
3.5 KiB
Groff
107 lines
3.5 KiB
Groff
.\" Copyright (c) 2003 Marcel Moolenaar
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\"
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd September 23, 2003
|
|
.Dt BUS_CONFIG_INTR 9
|
|
.Os
|
|
.\"
|
|
.Sh NAME
|
|
.Nm BUS_CONFIG_INTR
|
|
.Nd "configure interrupt polarity and trigger mode"
|
|
.\"
|
|
.Sh SYNOPSIS
|
|
.In sys/param.h
|
|
.In sys/bus.h
|
|
.Ft int
|
|
.Fo BUS_CONFIG_INTR
|
|
.Fa "device_t dev" "int irq" "enum intr_trigger trig" "enum intr_polarity pol"
|
|
.Fc
|
|
.\"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn BUS_CONFIG_INTR
|
|
method allows bus or device drivers to provide interrupt polarity and trigger
|
|
mode to parent busses.
|
|
This typically bubbles all the way up to the root bus (e.g.\& nexus) where the
|
|
necessary actions are taken to actually program the hardware.
|
|
Since the
|
|
.Fn BUS_CONFIG_INTR
|
|
method takes an interrupt number, it is assumed but not necessarily required
|
|
that it is called prior to
|
|
.Xr BUS_SETUP_INTR 9 .
|
|
.Pp
|
|
The
|
|
.Fa trig
|
|
argument can be one of:
|
|
.Bl -tag -width ".Dv INTR_TRIGGER_CONFORM"
|
|
.It Dv INTR_TRIGGER_CONFORM
|
|
The interrupt trigger mode is standard for the bus to which the device is
|
|
attached.
|
|
.It Dv INTR_TRIGGER_EDGE
|
|
The interrupt is edge triggered.
|
|
This means that the interrupt is raised by the rising edge of the signal on
|
|
the interrupt line.
|
|
The signal typically reverts to the original state so as to cause a spike.
|
|
.Dv INTR_TRIGGER_LEVEL
|
|
The interrupt is level triggered.
|
|
This means that the interrupt is raised when the signal on the interrupt line
|
|
transitions and remains unchanged after that until the interrupt has been
|
|
serviced, after which the signal transitions back.
|
|
.El
|
|
.Pp
|
|
The
|
|
.Fa pol
|
|
argument can be any one of:
|
|
.Bl -tag -width ".Dv INTR_POLARITY_CONFORM"
|
|
.It Dv INTR_POLARITY_CONFORM
|
|
The interrupt polarity is standard for the bus to which the device is attached.
|
|
.It Dv INTR_POLARITY_HIGH
|
|
The interrupt is activated by a high voltage on the interrupt line.
|
|
.It Dv INTR_POLARITY_LOW
|
|
The interrupt is activated by a low voltage on the interrupt line.
|
|
.El
|
|
.\"
|
|
.Sh RETURN VALUES
|
|
Zero is returned on success, otherwise an appropriate error is returned.
|
|
.\"
|
|
.Sh SEE ALSO
|
|
.Xr BUS_SETUP_INTR 9 ,
|
|
.Xr BUS_TEARDOWN_INTR 9 ,
|
|
.Xr device 9 ,
|
|
.Xr driver 9
|
|
.\"
|
|
.Sh HISTORY
|
|
The
|
|
.Fn BUS_CONFIG_INTR
|
|
method first appeared in
|
|
.Fx 5.2 .
|
|
.\"
|
|
.Sh AUTHORS
|
|
This manual page was written by
|
|
.An Marcel Moolenaar
|
|
.Aq marcel@xcllnt.net .
|