110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
/* $NetBSD: unixbp.c,v 1.8 2011/07/19 16:05:11 dyoung 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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/*
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* unixbp.c - driver for the Unix Backplane, found in the R140 etc
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*/
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#include <sys/param.h>
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__KERNEL_RCSID(0, "$NetBSD: unixbp.c,v 1.8 2011/07/19 16:05:11 dyoung Exp $");
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#include <sys/device.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <arch/acorn26/iobus/iocvar.h>
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#include <arch/acorn26/podulebus/unixbpreg.h>
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#include <arch/acorn26/podulebus/unixbpvar.h>
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struct unixbp_softc {
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device_t 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 unixbp_match(device_t, cfdata_t, void *);
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static void unixbp_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(unixbp, sizeof(struct unixbp_softc),
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unixbp_match, unixbp_attach, NULL, NULL);
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device_t the_unixbp;
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static int
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unixbp_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct ioc_attach_args *ioc = aux;
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bus_space_tag_t bst = ioc->ioc_fast_t;
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bus_space_handle_t bsh = ioc->ioc_fast_h;
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/* Ask to disable all interrupts and check the request lines go low. */
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bus_space_write_1(bst, bsh, UNIXBP_REG_MASK, 0);
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if ((bus_space_read_1(bst, bsh, UNIXBP_REG_REQUEST) & 0xf) != 0)
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return 0;
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/* Re-enable interrupts. */
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bus_space_write_1(bst, bsh, UNIXBP_REG_MASK, 0xf);
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return 1;
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}
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static void
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unixbp_attach(device_t parent, device_t self, void *aux)
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{
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struct ioc_attach_args *ioc = aux;
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struct unixbp_softc *sc = device_private(self);
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sc->sc_dev = self;
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if (the_unixbp == NULL)
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the_unixbp = self;
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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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aprint_normal("\n");
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}
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int
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unixbp_irq_status_full(void)
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{
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struct unixbp_softc *sc = device_private(the_unixbp);
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if (sc == NULL)
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return 0;
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return bus_space_read_1(sc->sc_iot, sc->sc_ioh, UNIXBP_REG_REQUEST)
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& 0xf;
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}
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void
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unixbp_irq_setmask(int mask)
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{
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struct unixbp_softc *sc = device_private(the_unixbp);
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if (sc == NULL)
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return;
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, UNIXBP_REG_MASK, mask & 0xf);
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}
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