NetBSD/sys/arch/arm26/ioc/ioeb.c

98 lines
3.1 KiB
C

/* $NetBSD: ioeb.c,v 1.5 2001/02/08 22:21:24 bjh21 Exp $ */
/*-
* Copyright (c) 2000 Ben Harris
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*/
/* This file is part of NetBSD/arm26 -- a port of NetBSD to ARM2/3 machines. */
#include <sys/param.h>
__KERNEL_RCSID(0, "$NetBSD: ioeb.c,v 1.5 2001/02/08 22:21:24 bjh21 Exp $");
#include <sys/device.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <arch/arm26/iobus/iocvar.h>
#include <arch/arm26/ioc/ioebreg.h>
#include <arch/arm26/ioc/ioebvar.h>
struct ioeb_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
static int ioeb_match(struct device *, struct cfdata *, void *);
static void ioeb_attach(struct device *, struct device *, void *);
struct cfattach ioeb_ca = {
sizeof(struct ioeb_softc), ioeb_match, ioeb_attach
};
struct device *the_ioeb;
/* IOEB is only four bits wide */
#define ioeb_read(t, h, o) (bus_space_read_1(t, h, o) & 0xf)
static int
ioeb_match(struct device *parent, struct cfdata *cf, void *aux)
{
struct ioc_attach_args *ioc = aux;
int id;
id = ioeb_read(ioc->ioc_fast_t, ioc->ioc_fast_h, IOEB_REG_ID);
if (id == IOEB_ID_IOEB)
return 1;
if (id != 0xf)
printf("ioeb_match: ID = %x\n", id);
return 0;
}
static void
ioeb_attach(struct device *parent, struct device *self, void *aux)
{
struct ioeb_softc *sc = (void *)self;
struct ioc_attach_args *ioc = aux;
if (the_ioeb == NULL)
the_ioeb = self;
sc->sc_iot = ioc->ioc_fast_t;
sc->sc_ioh = ioc->ioc_fast_h;
printf("\n");
}
void
ioeb_irq_clear(int mask)
{
struct ioeb_softc *sc = (void *)the_ioeb;
/* The IOEB only controls interrupt 0 */
if (mask & IOEB_IRQ_CLEARABLE_MASK)
bus_space_write_1(sc->sc_iot, sc->sc_ioh, IOEB_REG_INTRCLR, 0);
}