132 lines
3.4 KiB
C
132 lines
3.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2010 Juli Mallett <jmallett@FreeBSD.org>
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE 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 THE 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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* $FreeBSD$
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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/systm.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <contrib/octeon-sdk/cvmx.h>
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#include <contrib/octeon-sdk/cvmx-rtc.h>
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#include "clock_if.h"
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static int octeon_rtc_attach(device_t dev);
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static int octeon_rtc_probe(device_t dev);
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static int octeon_rtc_settime(device_t dev, struct timespec *ts);
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static int octeon_rtc_gettime(device_t dev, struct timespec *ts);
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static device_method_t octeon_rtc_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, octeon_rtc_probe),
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DEVMETHOD(device_attach, octeon_rtc_attach),
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/* clock interface */
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DEVMETHOD(clock_gettime, octeon_rtc_gettime),
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DEVMETHOD(clock_settime, octeon_rtc_settime),
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{ 0, 0 }
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};
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static driver_t octeon_rtc_driver = {
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"rtc",
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octeon_rtc_methods,
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0
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};
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static devclass_t octeon_rtc_devclass;
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DRIVER_MODULE(rtc, nexus, octeon_rtc_driver, octeon_rtc_devclass, 0, 0);
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static int
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octeon_rtc_probe(device_t dev)
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{
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cvmx_rtc_options_t supported;
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if (device_get_unit(dev) != 0)
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return (ENXIO);
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supported = cvmx_rtc_supported();
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if (supported == 0)
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return (ENXIO);
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device_set_desc(dev, "Cavium Octeon Realtime Clock");
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return (BUS_PROBE_NOWILDCARD);
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}
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static int
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octeon_rtc_attach(device_t dev)
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{
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cvmx_rtc_options_t supported;
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supported = cvmx_rtc_supported();
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if ((supported & CVMX_RTC_READ) == 0)
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return (ENXIO);
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clock_register(dev, 1000000);
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return (0);
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}
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static int
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octeon_rtc_settime(device_t dev, struct timespec *ts)
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{
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cvmx_rtc_options_t supported;
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uint32_t status;
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supported = cvmx_rtc_supported();
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if ((supported & CVMX_RTC_WRITE) == 0)
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return (ENOTSUP);
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status = cvmx_rtc_write(ts->tv_sec);
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if (status != 0)
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return (EINVAL);
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return (0);
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}
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static int
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octeon_rtc_gettime(device_t dev, struct timespec *ts)
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{
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uint32_t secs;
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secs = cvmx_rtc_read();
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if (secs == 0)
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return (ENOTSUP);
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ts->tv_sec = secs;
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ts->tv_nsec = 0;
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return (0);
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}
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