mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
94 lines
3.3 KiB
Objective-C
94 lines
3.3 KiB
Objective-C
#-
|
|
# Copyright (c) 2004-2006 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 ``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 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.
|
|
#
|
|
# $FreeBSD$
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/bus.h>
|
|
#include <machine/bus.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/rman.h>
|
|
#include <dev/scc/scc_bfe.h>
|
|
|
|
# The SCC hardware interface. The core SCC code is hardware independent.
|
|
# The details of the hardware are abstracted by the SCC hardware interface.
|
|
|
|
INTERFACE scc;
|
|
|
|
# Default implementations of some methods.
|
|
CODE {
|
|
static int
|
|
default_enabled(struct scc_softc *this, struct scc_chan *ch)
|
|
{
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
# attach() - attach hardware.
|
|
# This method is called when the device is being attached. All resources
|
|
# have been allocated. The intend of this method is to setup the hardware
|
|
# for normal operation.
|
|
# The reset parameter informs the hardware driver whether a full device
|
|
# reset is allowed or not. This is important when one of the channels can
|
|
# be used as system console and a hardware reset would disrupt output.
|
|
METHOD int attach {
|
|
struct scc_softc *this;
|
|
int reset;
|
|
};
|
|
|
|
# enabled()
|
|
METHOD int enabled {
|
|
struct scc_softc *this;
|
|
struct scc_chan *chan;
|
|
} DEFAULT default_enabled;
|
|
|
|
# iclear()
|
|
METHOD int iclear {
|
|
struct scc_softc *this;
|
|
struct scc_chan *chan;
|
|
};
|
|
|
|
# ipend() - query SCC for pending interrupts.
|
|
# When an interrupt is signalled, the handler will call this method to find
|
|
# out which of the interrupt sources needs attention. The handler will use
|
|
# this information to dispatch service routines that deal with each of the
|
|
# interrupt sources. An advantage of this approach is that it allows multi-
|
|
# port drivers (like puc(4)) to query multiple devices concurrently and
|
|
# service them on an interrupt priority basis. If the hardware cannot provide
|
|
# the information reliably, it is free to service the interrupt and return 0,
|
|
# meaning that no attention is required.
|
|
METHOD int ipend {
|
|
struct scc_softc *this;
|
|
}
|
|
|
|
# probe() - detect hardware.
|
|
# This method is called as part of the bus probe to make sure the
|
|
# hardware exists. This function should also set the device description
|
|
# to something that represents the hardware.
|
|
METHOD int probe {
|
|
struct scc_softc *this;
|
|
};
|