94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/* $NetBSD: ioeb.c,v 1.3 2000/12/09 18:04:05 bjh21 Exp $ */
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/*-
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* Copyright (c) 2000 Ben Harris
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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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* 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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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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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/* This file is part of NetBSD/arm26 -- a port of NetBSD to ARM2/3 machines. */
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#include <sys/param.h>
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__KERNEL_RCSID(0, "$NetBSD: ioeb.c,v 1.3 2000/12/09 18:04:05 bjh21 Exp $");
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#include <sys/device.h>
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#include <sys/systm.h>
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#include <machine/bus.h>
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#include <arch/arm26/iobus/iocvar.h>
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#include <arch/arm26/ioc/ioebreg.h>
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#include <arch/arm26/ioc/ioebvar.h>
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struct ioeb_softc {
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struct device sc_dev;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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};
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static int ioeb_match(struct device *, struct cfdata *, void *);
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static void ioeb_attach(struct device *, struct device *, void *);
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struct cfattach ioeb_ca = {
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sizeof(struct ioeb_softc), ioeb_match, ioeb_attach
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};
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/* IOEB is only four bits wide */
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#define ioeb_read(t, h, o) (bus_space_read_1(t, h, o) & 0xf)
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static int
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ioeb_match(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct ioc_attach_args *ioc = aux;
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int id;
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id = ioeb_read(ioc->ioc_fast_t, ioc->ioc_fast_h, IOEB_REG_ID);
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if (id == IOEB_ID_IOEB)
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return 1;
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if (id != 0xf)
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printf("ioeb_match: ID = %x\n", id);
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return 0;
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}
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static void
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ioeb_attach(struct device *parent, struct device *self, void *aux)
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{
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struct ioeb_softc *sc = (void *)self;
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struct ioc_attach_args *ioc = aux;
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sc->sc_iot = ioc->ioc_fast_t;
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sc->sc_ioh = ioc->ioc_fast_h;
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printf("\n");
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}
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void
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ioeb_irq_clear(struct device *self, int mask)
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{
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struct ioeb_softc *sc = (void *)self;
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/* The IOEB only controls interrupt 0 */
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if (mask & IOEB_IRQ_CLEARABLE_MASK)
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, IOEB_REG_INTRCLR, 0);
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}
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