135 lines
3.5 KiB
C
135 lines
3.5 KiB
C
/*-
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* Copyright (C) 2006-2008 Semihalf, Grzegorz Bernacki
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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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*
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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 AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR 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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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <powerpc/mpc85xx/ds1553_reg.h>
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#include <powerpc/mpc85xx/lbc.h>
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#include "clock_if.h"
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static devclass_t rtc_devclass;
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static int rtc_attach(device_t dev);
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static int rtc_probe(device_t dev);
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static device_method_t rtc_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, rtc_probe),
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DEVMETHOD(device_attach, rtc_attach),
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/* clock interface */
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DEVMETHOD(clock_gettime, ds1553_gettime),
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DEVMETHOD(clock_settime, ds1553_settime),
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{ 0, 0 }
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};
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static driver_t rtc_driver = {
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"rtc",
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rtc_methods,
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sizeof(struct ds1553_softc),
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};
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DRIVER_MODULE(rtc, lbc, rtc_driver, rtc_devclass, 0, 0);
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static int
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rtc_probe(device_t dev)
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{
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uintptr_t devtype;
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int error;
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error = BUS_READ_IVAR(device_get_parent(dev), dev, LBC_IVAR_DEVTYPE,
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&devtype);
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if (error)
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return (error);
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if (devtype != LBC_DEVTYPE_RTC)
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return (EINVAL);
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device_set_desc(dev, "Dallas Semiconductor DS1553 RTC");
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return (0);
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}
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static int
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rtc_attach(device_t dev)
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{
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struct timespec ts;
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struct ds1553_softc *sc;
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int error;
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sc = device_get_softc(dev);
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bzero(sc, sizeof(struct ds1553_softc));
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mtx_init(&sc->sc_mtx, "rtc_mtx", NULL, MTX_SPIN);
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sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
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RF_ACTIVE);
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if (sc->res == NULL) {
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device_printf(dev, "cannot allocate resources\n");
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mtx_destroy(&sc->sc_mtx);
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return (ENXIO);
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}
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sc->sc_bst = rman_get_bustag(sc->res);
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sc->sc_bsh = rman_get_bushandle(sc->res);
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if ((error = ds1553_attach(dev)) != 0) {
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device_printf(dev, "cannot attach time of day clock\n");
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bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
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mtx_destroy(&sc->sc_mtx);
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return (error);
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}
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clock_register(dev, 1000000);
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if (bootverbose) {
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ds1553_gettime(dev, &ts);
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device_printf(dev, "current time: %ld.%09ld\n",
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(long)ts.tv_sec, ts.tv_nsec);
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}
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return (0);
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}
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