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/*-
* Copyright (C) 2008 MARVELL INTERNATIONAL LTD.
* All rights reserved.
*
* Developed by Semihalf.
*
* 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. Neither the name of MARVELL nor the names of contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/time.h>
#include <sys/clock.h>
#include <sys/resource.h>
#include <sys/systm.h>
#include <sys/rman.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include "clock_if.h"
#define MV_RTC_TIME_REG 0x00
#define MV_RTC_DATE_REG 0x04
#define YEAR_BASE 2000
struct mv_rtc_softc {
device_t dev;
struct resource *res[1];
};
static struct resource_spec res_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
{ -1, 0 }
};
static int mv_rtc_probe(device_t dev);
static int mv_rtc_attach(device_t dev);
static int mv_rtc_gettime(device_t dev, struct timespec *ts);
static int mv_rtc_settime(device_t dev, struct timespec *ts);
static uint32_t mv_rtc_reg_read(struct mv_rtc_softc *sc, bus_size_t off);
static int mv_rtc_reg_write(struct mv_rtc_softc *sc, bus_size_t off,
uint32_t val);
static device_method_t mv_rtc_methods[] = {
DEVMETHOD(device_probe, mv_rtc_probe),
DEVMETHOD(device_attach, mv_rtc_attach),
DEVMETHOD(clock_gettime, mv_rtc_gettime),
DEVMETHOD(clock_settime, mv_rtc_settime),
{ 0, 0 },
};
static driver_t mv_rtc_driver = {
"rtc",
mv_rtc_methods,
sizeof(struct mv_rtc_softc),
};
static devclass_t mv_rtc_devclass;
DRIVER_MODULE(mv_rtc, simplebus, mv_rtc_driver, mv_rtc_devclass, 0, 0);
static int
mv_rtc_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "mrvl,rtc"))
return (ENXIO);
device_set_desc(dev, "Marvell Integrated RTC");
return (BUS_PROBE_DEFAULT);
}
static int
mv_rtc_attach(device_t dev)
{
struct mv_rtc_softc *sc;
sc = device_get_softc(dev);
sc->dev = dev;
clock_register(dev, 1000000);
if (bus_alloc_resources(dev, res_spec, sc->res)) {
device_printf(dev, "could not allocate resources\n");
return (ENXIO);
}
return (0);
}
static int
mv_rtc_gettime(device_t dev, struct timespec *ts)
{
struct clocktime ct;
struct mv_rtc_softc *sc;
uint32_t val;
sc = device_get_softc(dev);
val = mv_rtc_reg_read(sc, MV_RTC_TIME_REG);
ct.nsec = 0;
ct.sec = FROMBCD(val & 0x7f);
ct.min = FROMBCD((val & 0x7f00) >> 8);
ct.hour = FROMBCD((val & 0x3f0000) >> 16);
ct.dow = FROMBCD((val & 0x7000000) >> 24) - 1;
val = mv_rtc_reg_read(sc, MV_RTC_DATE_REG);
ct.day = FROMBCD(val & 0x7f);
ct.mon = FROMBCD((val & 0x1f00) >> 8);
ct.year = YEAR_BASE + FROMBCD((val & 0xff0000) >> 16);
return (clock_ct_to_ts(&ct, ts));
}
static int
mv_rtc_settime(device_t dev, struct timespec *ts)
{
struct clocktime ct;
struct mv_rtc_softc *sc;
uint32_t val;
sc = device_get_softc(dev);
/* Resolution: 1 sec */
if (ts->tv_nsec >= 500000000)
ts->tv_sec++;
ts->tv_nsec = 0;
clock_ts_to_ct(ts, &ct);
val = TOBCD(ct.sec) | (TOBCD(ct.min) << 8) |
(TOBCD(ct.hour) << 16) | (TOBCD( ct.dow + 1) << 24);
mv_rtc_reg_write(sc, MV_RTC_TIME_REG, val);
val = TOBCD(ct.day) | (TOBCD(ct.mon) << 8) |
(TOBCD(ct.year - YEAR_BASE) << 16);
mv_rtc_reg_write(sc, MV_RTC_DATE_REG, val);
return (0);
}
static uint32_t
mv_rtc_reg_read(struct mv_rtc_softc *sc, bus_size_t off)
{
return (bus_read_4(sc->res[0], off));
}
static int
mv_rtc_reg_write(struct mv_rtc_softc *sc, bus_size_t off, uint32_t val)
{
bus_write_4(sc->res[0], off, val);
return (0);
}
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