NetBSD/sys/arch/acorn26/podulebus/unixbp.c

108 lines
3.4 KiB
C

/* $NetBSD: unixbp.c,v 1.5 2002/10/02 03:25:47 thorpej 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.
*/
/*
* unixbp.c - driver for the Unix Backplane, found in the R140 etc
*/
#include <sys/param.h>
__KERNEL_RCSID(0, "$NetBSD: unixbp.c,v 1.5 2002/10/02 03:25:47 thorpej Exp $");
#include <sys/device.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <arch/acorn26/iobus/iocvar.h>
#include <arch/acorn26/podulebus/unixbpreg.h>
#include <arch/acorn26/podulebus/unixbpvar.h>
struct unixbp_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
static int unixbp_match(struct device *, struct cfdata *, void *);
static void unixbp_attach(struct device *, struct device *, void *);
CFATTACH_DECL(unixbp, sizeof(struct unixbp_softc),
unixbp_match, unixbp_attach, NULL, NULL);
struct device *the_unixbp;
static int
unixbp_match(struct device *parent, struct cfdata *cf, void *aux)
{
struct ioc_attach_args *ioc = aux;
bus_space_tag_t bst = ioc->ioc_fast_t;
bus_space_handle_t bsh = ioc->ioc_fast_h;
/* Ask to disable all interrupts and check the request lines go low. */
bus_space_write_1(bst, bsh, UNIXBP_REG_MASK, 0);
if ((bus_space_read_1(bst, bsh, UNIXBP_REG_REQUEST) & 0xf) != 0)
return 0;
/* Re-enable interrupts. */
bus_space_write_1(bst, bsh, UNIXBP_REG_MASK, 0xf);
return 1;
}
static void
unixbp_attach(struct device *parent, struct device *self, void *aux)
{
struct ioc_attach_args *ioc = aux;
struct unixbp_softc *sc = (void *)self;
if (the_unixbp == NULL)
the_unixbp = self;
sc->sc_iot = ioc->ioc_fast_t;
sc->sc_ioh = ioc->ioc_fast_h;
printf("\n");
}
int
unixbp_irq_status_full()
{
struct unixbp_softc *sc = (void *)the_unixbp;
if (sc == NULL)
return 0;
return bus_space_read_1(sc->sc_iot, sc->sc_ioh, UNIXBP_REG_REQUEST)
& 0xf;
}
void
unixbp_irq_setmask(int mask)
{
struct unixbp_softc *sc = (void *)the_unixbp;
if (sc == NULL)
return;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, UNIXBP_REG_MASK, mask & 0xf);
}