1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2010 Juli Mallett <jmallett@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD$"); 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/bus.h> 37#include <sys/clock.h> 38#include <sys/kernel.h> 39#include <sys/lock.h> 40#include <sys/module.h> 41 42#include <contrib/octeon-sdk/cvmx.h> 43#include <contrib/octeon-sdk/cvmx-rtc.h> 44 45#include "clock_if.h" 46 47static int octeon_rtc_attach(device_t dev); 48static int octeon_rtc_probe(device_t dev); 49 50static int octeon_rtc_settime(device_t dev, struct timespec *ts); 51static int octeon_rtc_gettime(device_t dev, struct timespec *ts); 52 53static device_method_t octeon_rtc_methods[] = { 54 /* Device interface */ 55 DEVMETHOD(device_probe, octeon_rtc_probe), 56 DEVMETHOD(device_attach, octeon_rtc_attach), 57 58 /* clock interface */ 59 DEVMETHOD(clock_gettime, octeon_rtc_gettime), 60 DEVMETHOD(clock_settime, octeon_rtc_settime), 61 { 0, 0 } 62}; 63 64static driver_t octeon_rtc_driver = { 65 "rtc", 66 octeon_rtc_methods, 67 0 68}; 69static devclass_t octeon_rtc_devclass; 70DRIVER_MODULE(rtc, nexus, octeon_rtc_driver, octeon_rtc_devclass, 0, 0); 71 72static int 73octeon_rtc_probe(device_t dev) 74{ 75 cvmx_rtc_options_t supported; 76 77 if (device_get_unit(dev) != 0) 78 return (ENXIO); 79 80 supported = cvmx_rtc_supported(); 81 if (supported == 0) 82 return (ENXIO); 83 84 device_set_desc(dev, "Cavium Octeon Realtime Clock"); 85 return (BUS_PROBE_NOWILDCARD); 86} 87 88static int 89octeon_rtc_attach(device_t dev) 90{ 91 cvmx_rtc_options_t supported; 92 93 supported = cvmx_rtc_supported(); 94 if ((supported & CVMX_RTC_READ) == 0) 95 return (ENXIO); 96 97 clock_register(dev, 1000000); 98 return (0); 99} 100 101static int 102octeon_rtc_settime(device_t dev, struct timespec *ts) 103{ 104 cvmx_rtc_options_t supported; 105 uint32_t status; 106 107 supported = cvmx_rtc_supported(); 108 if ((supported & CVMX_RTC_WRITE) == 0) 109 return (ENOTSUP); 110 111 status = cvmx_rtc_write(ts->tv_sec); 112 if (status != 0) 113 return (EINVAL); 114 115 return (0); 116} 117 118static int 119octeon_rtc_gettime(device_t dev, struct timespec *ts) 120{ 121 uint32_t secs; 122 123 secs = cvmx_rtc_read(); 124 if (secs == 0) 125 return (ENOTSUP); 126 127 ts->tv_sec = secs; 128 ts->tv_nsec = 0; 129 130 return (0); 131} 132