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/*-
* Copyright (C) 2006-2008 Semihalf, Grzegorz Bernacki
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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.
*
* From: FreeBSD: src/sys/powerpc/mpc85xx/ds1553_bus_lbc.c,v 1.2 2009/06/24 15:48:20 raj
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/clock.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <dev/ofw/ofw_bus_subr.h>
#include "ds1553_reg.h"
#include "clock_if.h"
static devclass_t rtc_devclass;
static int rtc_attach(device_t dev);
static int rtc_probe(device_t dev);
static device_method_t rtc_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, rtc_probe),
DEVMETHOD(device_attach, rtc_attach),
/* clock interface */
DEVMETHOD(clock_gettime, ds1553_gettime),
DEVMETHOD(clock_settime, ds1553_settime),
{ 0, 0 }
};
static driver_t rtc_driver = {
"rtc",
rtc_methods,
sizeof(struct ds1553_softc),
};
DRIVER_MODULE(rtc, lbc, rtc_driver, rtc_devclass, 0, 0);
static int
rtc_probe(device_t dev)
{
if (!ofw_bus_is_compatible(dev, "dallas,ds1553"))
return (ENXIO);
device_set_desc(dev, "Dallas Semiconductor DS1553 RTC");
return (BUS_PROBE_DEFAULT);
}
static int
rtc_attach(device_t dev)
{
struct timespec ts;
struct ds1553_softc *sc;
int error;
sc = device_get_softc(dev);
bzero(sc, sizeof(struct ds1553_softc));
mtx_init(&sc->sc_mtx, "rtc_mtx", NULL, MTX_SPIN);
sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
RF_ACTIVE);
if (sc->res == NULL) {
device_printf(dev, "cannot allocate resources\n");
mtx_destroy(&sc->sc_mtx);
return (ENXIO);
}
sc->sc_bst = rman_get_bustag(sc->res);
sc->sc_bsh = rman_get_bushandle(sc->res);
if ((error = ds1553_attach(dev)) != 0) {
device_printf(dev, "cannot attach time of day clock\n");
bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
mtx_destroy(&sc->sc_mtx);
return (error);
}
clock_register(dev, 1000000);
if (bootverbose) {
ds1553_gettime(dev, &ts);
device_printf(dev, "current time: %ld.%09ld\n",
(long)ts.tv_sec, ts.tv_nsec);
}
return (0);
}
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