94 lines
3.3 KiB
Objective-C
94 lines
3.3 KiB
Objective-C
#-
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# Copyright (c) 2004-2006 Marcel Moolenaar
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# $FreeBSD$
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/rman.h>
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#include <dev/scc/scc_bfe.h>
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# The SCC hardware interface. The core SCC code is hardware independent.
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# The details of the hardware are abstracted by the SCC hardware interface.
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INTERFACE scc;
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# Default implementations of some methods.
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CODE {
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static int
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default_enabled(struct scc_softc *this, struct scc_chan *ch)
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{
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return (1);
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}
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}
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# attach() - attach hardware.
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# This method is called when the device is being attached. All resources
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# have been allocated. The intend of this method is to setup the hardware
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# for normal operation.
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# The reset parameter informs the hardware driver whether a full device
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# reset is allowed or not. This is important when one of the channels can
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# be used as system console and a hardware reset would disrupt output.
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METHOD int attach {
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struct scc_softc *this;
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int reset;
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};
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# enabled()
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METHOD int enabled {
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struct scc_softc *this;
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struct scc_chan *chan;
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} DEFAULT default_enabled;
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# iclear()
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METHOD int iclear {
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struct scc_softc *this;
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struct scc_chan *chan;
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};
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# ipend() - query SCC for pending interrupts.
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# When an interrupt is signalled, the handler will call this method to find
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# out which of the interrupt sources needs attention. The handler will use
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# this information to dispatch service routines that deal with each of the
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# interrupt sources. An advantage of this approach is that it allows multi-
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# port drivers (like puc(4)) to query multiple devices concurrently and
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# service them on an interrupt priority basis. If the hardware cannot provide
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# the information reliably, it is free to service the interrupt and return 0,
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# meaning that no attention is required.
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METHOD int ipend {
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struct scc_softc *this;
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}
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# probe() - detect hardware.
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# This method is called as part of the bus probe to make sure the
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# hardware exists. This function should also set the device description
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# to something that represents the hardware.
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METHOD int probe {
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struct scc_softc *this;
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};
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