110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
/* $NetBSD: unixbp.c,v 1.4 2001/01/23 23:58:32 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. */
|
|
/*
|
|
* unixbp.c - driver for the Unix Backplane, found in the R140 etc
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
|
|
__KERNEL_RCSID(0, "$NetBSD: unixbp.c,v 1.4 2001/01/23 23:58:32 bjh21 Exp $");
|
|
|
|
#include <sys/device.h>
|
|
#include <sys/systm.h>
|
|
#include <machine/bus.h>
|
|
#include <arch/arm26/iobus/iocvar.h>
|
|
#include <arch/arm26/podulebus/unixbpreg.h>
|
|
#include <arch/arm26/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 *);
|
|
|
|
struct cfattach unixbp_ca = {
|
|
sizeof(struct unixbp_softc), unixbp_match, unixbp_attach
|
|
};
|
|
|
|
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);
|
|
}
|