as3722_rtc.c revision 302408
1112129Stjr/*- 2112129Stjr * Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org> 3112129Stjr * All rights reserved. 4112129Stjr * 5112129Stjr * Redistribution and use in source and binary forms, with or without 6112129Stjr * modification, are permitted provided that the following conditions 7112129Stjr * are met: 8112129Stjr * 1. Redistributions of source code must retain the above copyright 9112129Stjr * notice, this list of conditions and the following disclaimer. 10112129Stjr * 2. Redistributions in binary form must reproduce the above copyright 11112129Stjr * notice, this list of conditions and the following disclaimer in the 12112129Stjr * documentation and/or other materials provided with the distribution. 13112129Stjr * 14112129Stjr * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15112129Stjr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16112129Stjr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17112129Stjr * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18112129Stjr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19112129Stjr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20112129Stjr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21112129Stjr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22112129Stjr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23112129Stjr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24112129Stjr * SUCH DAMAGE. 25112129Stjr */ 26112129Stjr 27112129Stjr#include <sys/cdefs.h> 28112129Stjr__FBSDID("$FreeBSD: stable/11/sys/arm/nvidia/as3722_rtc.c 296936 2016-03-16 13:01:48Z mmel $"); 29112129Stjr 30112129Stjr#include <sys/param.h> 31112129Stjr#include <sys/systm.h> 32112129Stjr#include <sys/bus.h> 33112129Stjr#include <sys/clock.h> 34112129Stjr#include <sys/kernel.h> 35112129Stjr 36112129Stjr#include <dev/ofw/ofw_bus.h> 37112129Stjr 38112129Stjr#include "clock_if.h" 39112129Stjr#include "as3722.h" 40112129Stjr 41112129Stjr#define AS3722_RTC_START_YEAR 2000 42112129Stjr 43112129Stjrint 44112129Stjras3722_rtc_gettime(device_t dev, struct timespec *ts) 45112129Stjr{ 46112129Stjr struct as3722_softc *sc; 47112129Stjr struct clocktime ct; 48112129Stjr uint8_t buf[6]; 49112129Stjr int rv; 50112129Stjr 51112129Stjr sc = device_get_softc(dev); 52112129Stjr 53112129Stjr rv = as3722_read_buf(sc, AS3722_RTC_SECOND, buf, 6); 54112129Stjr if (rv != 0) { 55112129Stjr device_printf(sc->dev, "Failed to read RTC data\n"); 56112129Stjr return (rv); 57112129Stjr } 58112129Stjr ct.nsec = 0; 59112129Stjr ct.sec = bcd2bin(buf[0] & 0x7F); 60112129Stjr ct.min = bcd2bin(buf[1] & 0x7F); 61112129Stjr ct.hour = bcd2bin(buf[2] & 0x3F); 62112129Stjr ct.day = bcd2bin(buf[3] & 0x3F); 63112129Stjr ct.mon = bcd2bin(buf[4] & 0x1F); 64112129Stjr ct.year = bcd2bin(buf[5] & 0x7F) + AS3722_RTC_START_YEAR; 65112129Stjr ct.dow = -1; 66112129Stjr 67112129Stjr return clock_ct_to_ts(&ct, ts); 68112129Stjr} 69112129Stjr 70112129Stjrint 71112129Stjras3722_rtc_settime(device_t dev, struct timespec *ts) 72112129Stjr{ 73112129Stjr struct as3722_softc *sc; 74112129Stjr struct clocktime ct; 75112129Stjr uint8_t buf[6]; 76112129Stjr int rv; 77112129Stjr 78112129Stjr sc = device_get_softc(dev); 79112129Stjr clock_ts_to_ct(ts, &ct); 80112129Stjr 81112129Stjr if (ct.year < AS3722_RTC_START_YEAR) 82112129Stjr return (EINVAL); 83112129Stjr 84112129Stjr buf[0] = bin2bcd(ct.sec); 85112129Stjr buf[1] = bin2bcd(ct.min); 86112129Stjr buf[2] = bin2bcd(ct.hour); 87112129Stjr buf[3] = bin2bcd(ct.day); 88112129Stjr buf[4] = bin2bcd(ct.mon); 89112129Stjr buf[5] = bin2bcd(ct.year - AS3722_RTC_START_YEAR); 90112129Stjr 91112129Stjr rv = as3722_write_buf(sc, AS3722_RTC_SECOND, buf, 6); 92112129Stjr if (rv != 0) { 93112129Stjr device_printf(sc->dev, "Failed to write RTC data\n"); 94112129Stjr return (rv); 95112129Stjr } 96112132Stjr return (0); 97112129Stjr} 98112129Stjr 99112129Stjrint 100112129Stjras3722_rtc_attach(struct as3722_softc *sc, phandle_t node) 101112129Stjr{ 102112129Stjr int rv; 103112129Stjr 104112129Stjr /* Enable RTC, set 24 hours mode and alarms */ 105112129Stjr rv = RM1(sc, AS3722_RTC_CONTROL, 106184548Speter AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN | AS3722_RTC_AM_PM_MODE, 107217106Skib AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN); 108217106Skib if (rv < 0) { 109 device_printf(sc->dev, "Failed to initialize RTC controller\n"); 110 return (ENXIO); 111 } 112 clock_register(sc->dev, 1000000); 113 114 return (0); 115} 116