diff options
Diffstat (limited to 'sys/powerpc/mpc85xx/ds1553_bus_fdt.c')
| -rw-r--r-- | sys/powerpc/mpc85xx/ds1553_bus_fdt.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/sys/powerpc/mpc85xx/ds1553_bus_fdt.c b/sys/powerpc/mpc85xx/ds1553_bus_fdt.c new file mode 100644 index 000000000000..2457ca2ca98e --- /dev/null +++ b/sys/powerpc/mpc85xx/ds1553_bus_fdt.c @@ -0,0 +1,124 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * 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> + +#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 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, 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); +} |