d4fcf3cba5
and amd64. The optimization is a trivial on recent machines. Reviewed by: -arch (imp, marcel, dfr)
134 lines
3.9 KiB
C
134 lines
3.9 KiB
C
/* $NetBSD: mcclock_tlsb.c,v 1.8 1998/05/13 02:50:29 thorpej Exp $ */
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/*-
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* Copyright (c) 1997 by Matthew Jacob
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* NASA AMES Research Center.
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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 immediately at the beginning of the file, without modification,
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* 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <isa/isavar.h>
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#include <machine/clockvar.h>
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#include <dev/dec/mcclockvar.h>
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#include <dev/dec/mc146818reg.h>
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struct mcclock_softc {
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struct resource *port;
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};
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static int mcclock_isa_probe(device_t dev);
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static int mcclock_isa_attach(device_t dev);
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static void mcclock_isa_write(device_t, u_int, u_int);
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static u_int mcclock_isa_read(device_t, u_int);
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static device_method_t mcclock_isa_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, mcclock_isa_probe),
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DEVMETHOD(device_attach, mcclock_isa_attach),
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/* mcclock interface */
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DEVMETHOD(mcclock_write, mcclock_isa_write),
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DEVMETHOD(mcclock_read, mcclock_isa_read),
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/* clock interface */
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DEVMETHOD(clock_init, mcclock_init),
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DEVMETHOD(clock_get, mcclock_get),
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DEVMETHOD(clock_set, mcclock_set),
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DEVMETHOD(clock_getsecs, mcclock_getsecs),
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{ 0, 0 }
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};
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static driver_t mcclock_isa_driver = {
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"mcclock",
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mcclock_isa_methods,
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1, /* XXX no softc */
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};
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static devclass_t mcclock_devclass;
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int
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mcclock_isa_probe(device_t dev)
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{
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struct mcclock_softc *sc = device_get_softc(dev);
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int rid;
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/* No pnp support */
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if (isa_get_vendorid(dev))
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return (ENXIO);
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rid = 0;
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sc->port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
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0ul, ~0ul, 2, RF_ACTIVE);
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if (!sc->port)
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return ENXIO;
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device_set_desc(dev, "MC146818A real time clock");
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return 0;
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}
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int
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mcclock_isa_attach(device_t dev)
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{
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mcclock_attach(dev);
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return 0;
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}
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static void
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mcclock_isa_write(device_t dev, u_int reg, u_int val)
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{
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struct mcclock_softc *sc = device_get_softc(dev);
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bus_space_tag_t iot = rman_get_bustag(sc->port);
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bus_space_handle_t ioh = rman_get_bushandle(sc->port);
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bus_space_write_1(iot, ioh, 0, reg);
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bus_space_write_1(iot, ioh, 1, val);
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}
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static u_int
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mcclock_isa_read(device_t dev, u_int reg)
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{
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struct mcclock_softc *sc = device_get_softc(dev);
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bus_space_tag_t iot = rman_get_bustag(sc->port);
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bus_space_handle_t ioh = rman_get_bushandle(sc->port);
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bus_space_write_1(iot, ioh, 0, reg);
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return bus_space_read_1(iot, ioh, 1);
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}
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DRIVER_MODULE(mcclock, isa, mcclock_isa_driver, mcclock_devclass, 0, 0);
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