/* $NetBSD: latches.c,v 1.4 2002/10/02 03:25:47 thorpej Exp $ */ /*- * Copyright (c) 2001 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. */ #include <sys/param.h> __KERNEL_RCSID(0, "$NetBSD: latches.c,v 1.4 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/ioc/latchreg.h> #include <arch/acorn26/ioc/latchvar.h> #include <arch/acorn26/ioc/ioebvar.h> #include "ioeb.h" struct latches_softc { struct device sc_dev; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; u_int8_t sc_latcha; u_int8_t sc_latchb; }; static int latches_match(struct device *, struct cfdata *, void *); static void latches_attach(struct device *, struct device *, void *); CFATTACH_DECL(latches, sizeof(struct latches_softc), latches_match, latches_attach, NULL, NULL); struct device *the_latches; static int latches_match(struct device *parent, struct cfdata *cf, void *aux) { /* * Latches are write-only, so we can't probe for them. * Happily, the set of machines they exist on is precisely the * set that doesn't have IOEBs, so... */ #if NIOEB > 0 if (the_ioeb != NULL) return 0; #endif return 1; } static void latches_attach(struct device *parent, struct device *self, void *aux) { struct latches_softc *sc = (void *)self; struct ioc_attach_args *ioc = aux; bus_space_tag_t iot; bus_space_handle_t ioh; if (the_latches == NULL) the_latches = self; iot = sc->sc_iot = ioc->ioc_fast_t; ioh = sc->sc_ioh = ioc->ioc_fast_h; sc->sc_latcha = LATCHA_NSEL0 | LATCHA_NSEL1 | LATCHA_NSEL2 | LATCHA_NSEL3 | LATCHA_NSIDE1 | LATCHA_NMOTORON | LATCHA_NINUSE; sc->sc_latchb = LATCHB_NFDCR | LATCHB_NPSTB; bus_space_write_1(sc->sc_iot, sc->sc_ioh, LATCH_A, sc->sc_latcha); bus_space_write_1(sc->sc_iot, sc->sc_ioh, LATCH_B, sc->sc_latchb); printf("\n"); } void latcha_update(u_int8_t mask, u_int8_t value) { struct latches_softc *sc = (void *)the_latches; sc->sc_latcha = (sc->sc_latcha & ~mask) | value; bus_space_write_1(sc->sc_iot, sc->sc_ioh, LATCH_A, sc->sc_latcha); } void latchb_update(u_int8_t mask, u_int8_t value) { struct latches_softc *sc = (void *)the_latches; sc->sc_latchb = (sc->sc_latchb & ~mask) | value; bus_space_write_1(sc->sc_iot, sc->sc_ioh, LATCH_B, sc->sc_latcha); }