71d90c04a8
to check the status property in their probe routines. Simplebus used to only instantiate its children whose status="okay" but that was improper behavior, fixed in r261352. Now that it doesn't check anymore and probes all its children; the children all have to do the check because really only the children know how to properly interpret their status property strings. Right now all existing drivers only understand "okay" versus something- that's-not-okay, so they all use the new ofw_bus_status_okay() helper.
194 lines
4.9 KiB
C
194 lines
4.9 KiB
C
/*-
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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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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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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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static devclass_t mv_rtc_devclass;
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DRIVER_MODULE(mv_rtc, simplebus, mv_rtc_driver, mv_rtc_devclass, 0, 0);
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static int
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mv_rtc_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (!ofw_bus_is_compatible(dev, "mrvl,rtc"))
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return (ENXIO);
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device_set_desc(dev, "Marvell Integrated RTC");
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return (BUS_PROBE_DEFAULT);
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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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