2008-10-13 20:07:13 +00:00
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/*-
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2017-11-20 19:43:44 +00:00
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* SPDX-License-Identifier: BSD-3-Clause
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*
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2008-10-13 20:07:13 +00:00
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* Copyright (C) 2008 MARVELL INTERNATIONAL LTD.
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* All rights reserved.
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*
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* Developed by Semihalf.
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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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* 3. Neither the name of MARVELL nor the names of contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/lock.h>
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#include <sys/time.h>
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#include <sys/clock.h>
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#include <sys/resource.h>
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#include <sys/systm.h>
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#include <sys/rman.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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2010-06-13 13:28:53 +00:00
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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2008-10-13 20:07:13 +00:00
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#include "clock_if.h"
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#define MV_RTC_TIME_REG 0x00
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#define MV_RTC_DATE_REG 0x04
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#define YEAR_BASE 2000
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struct mv_rtc_softc {
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device_t dev;
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struct resource *res[1];
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};
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static struct resource_spec res_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE },
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{ -1, 0 }
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};
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static int mv_rtc_probe(device_t dev);
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static int mv_rtc_attach(device_t dev);
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static int mv_rtc_gettime(device_t dev, struct timespec *ts);
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static int mv_rtc_settime(device_t dev, struct timespec *ts);
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static uint32_t mv_rtc_reg_read(struct mv_rtc_softc *sc, bus_size_t off);
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static int mv_rtc_reg_write(struct mv_rtc_softc *sc, bus_size_t off,
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uint32_t val);
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static device_method_t mv_rtc_methods[] = {
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DEVMETHOD(device_probe, mv_rtc_probe),
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DEVMETHOD(device_attach, mv_rtc_attach),
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DEVMETHOD(clock_gettime, mv_rtc_gettime),
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DEVMETHOD(clock_settime, mv_rtc_settime),
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{ 0, 0 },
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};
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static driver_t mv_rtc_driver = {
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"rtc",
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mv_rtc_methods,
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sizeof(struct mv_rtc_softc),
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};
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2022-05-09 21:26:45 +00:00
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DRIVER_MODULE(mv_rtc, simplebus, mv_rtc_driver, 0, 0);
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2008-10-13 20:07:13 +00:00
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static int
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mv_rtc_probe(device_t dev)
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{
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2014-02-02 19:17:28 +00:00
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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2010-06-13 13:28:53 +00:00
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if (!ofw_bus_is_compatible(dev, "mrvl,rtc"))
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return (ENXIO);
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2008-10-13 20:07:13 +00:00
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device_set_desc(dev, "Marvell Integrated RTC");
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2010-06-13 13:28:53 +00:00
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return (BUS_PROBE_DEFAULT);
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2008-10-13 20:07:13 +00:00
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}
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static int
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mv_rtc_attach(device_t dev)
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{
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struct mv_rtc_softc *sc;
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sc = device_get_softc(dev);
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sc->dev = dev;
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clock_register(dev, 1000000);
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if (bus_alloc_resources(dev, res_spec, sc->res)) {
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device_printf(dev, "could not allocate resources\n");
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return (ENXIO);
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}
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return (0);
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}
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static int
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mv_rtc_gettime(device_t dev, struct timespec *ts)
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{
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struct clocktime ct;
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struct mv_rtc_softc *sc;
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uint32_t val;
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sc = device_get_softc(dev);
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val = mv_rtc_reg_read(sc, MV_RTC_TIME_REG);
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ct.nsec = 0;
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ct.sec = FROMBCD(val & 0x7f);
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ct.min = FROMBCD((val & 0x7f00) >> 8);
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ct.hour = FROMBCD((val & 0x3f0000) >> 16);
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ct.dow = FROMBCD((val & 0x7000000) >> 24) - 1;
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val = mv_rtc_reg_read(sc, MV_RTC_DATE_REG);
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ct.day = FROMBCD(val & 0x7f);
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ct.mon = FROMBCD((val & 0x1f00) >> 8);
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ct.year = YEAR_BASE + FROMBCD((val & 0xff0000) >> 16);
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return (clock_ct_to_ts(&ct, ts));
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}
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static int
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mv_rtc_settime(device_t dev, struct timespec *ts)
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{
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struct clocktime ct;
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struct mv_rtc_softc *sc;
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uint32_t val;
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sc = device_get_softc(dev);
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/* Resolution: 1 sec */
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if (ts->tv_nsec >= 500000000)
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ts->tv_sec++;
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ts->tv_nsec = 0;
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clock_ts_to_ct(ts, &ct);
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val = TOBCD(ct.sec) | (TOBCD(ct.min) << 8) |
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(TOBCD(ct.hour) << 16) | (TOBCD( ct.dow + 1) << 24);
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mv_rtc_reg_write(sc, MV_RTC_TIME_REG, val);
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val = TOBCD(ct.day) | (TOBCD(ct.mon) << 8) |
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(TOBCD(ct.year - YEAR_BASE) << 16);
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mv_rtc_reg_write(sc, MV_RTC_DATE_REG, val);
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return (0);
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}
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static uint32_t
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mv_rtc_reg_read(struct mv_rtc_softc *sc, bus_size_t off)
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{
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return (bus_read_4(sc->res[0], off));
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}
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static int
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mv_rtc_reg_write(struct mv_rtc_softc *sc, bus_size_t off, uint32_t val)
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{
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bus_write_4(sc->res[0], off, val);
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return (0);
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}
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