1 /*- 2 * Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/param.h> 28 #include <sys/systm.h> 29 #include <sys/bus.h> 30 #include <sys/clock.h> 31 #include <sys/kernel.h> 32 33 #include <dev/ofw/ofw_bus.h> 34 35 #include "clock_if.h" 36 #include "as3722.h" 37 38 #define AS3722_RTC_START_YEAR 2000 39 40 int 41 as3722_rtc_gettime(device_t dev, struct timespec *ts) 42 { 43 struct as3722_softc *sc; 44 struct clocktime ct; 45 uint8_t buf[6]; 46 int rv; 47 48 sc = device_get_softc(dev); 49 50 rv = as3722_read_buf(sc, AS3722_RTC_SECOND, buf, 6); 51 if (rv != 0) { 52 device_printf(sc->dev, "Failed to read RTC data\n"); 53 return (rv); 54 } 55 ct.nsec = 0; 56 ct.sec = bcd2bin(buf[0] & 0x7F); 57 ct.min = bcd2bin(buf[1] & 0x7F); 58 ct.hour = bcd2bin(buf[2] & 0x3F); 59 ct.day = bcd2bin(buf[3] & 0x3F); 60 ct.mon = bcd2bin(buf[4] & 0x1F); 61 ct.year = bcd2bin(buf[5] & 0x7F) + AS3722_RTC_START_YEAR; 62 ct.dow = -1; 63 64 return clock_ct_to_ts(&ct, ts); 65 } 66 67 int 68 as3722_rtc_settime(device_t dev, struct timespec *ts) 69 { 70 struct as3722_softc *sc; 71 struct clocktime ct; 72 uint8_t buf[6]; 73 int rv; 74 75 sc = device_get_softc(dev); 76 clock_ts_to_ct(ts, &ct); 77 78 if (ct.year < AS3722_RTC_START_YEAR) 79 return (EINVAL); 80 81 buf[0] = bin2bcd(ct.sec); 82 buf[1] = bin2bcd(ct.min); 83 buf[2] = bin2bcd(ct.hour); 84 buf[3] = bin2bcd(ct.day); 85 buf[4] = bin2bcd(ct.mon); 86 buf[5] = bin2bcd(ct.year - AS3722_RTC_START_YEAR); 87 88 rv = as3722_write_buf(sc, AS3722_RTC_SECOND, buf, 6); 89 if (rv != 0) { 90 device_printf(sc->dev, "Failed to write RTC data\n"); 91 return (rv); 92 } 93 return (0); 94 } 95 96 int 97 as3722_rtc_attach(struct as3722_softc *sc, phandle_t node) 98 { 99 int rv; 100 101 /* Enable RTC, set 24 hours mode and alarms */ 102 rv = RM1(sc, AS3722_RTC_CONTROL, 103 AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN | AS3722_RTC_AM_PM_MODE, 104 AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN); 105 if (rv < 0) { 106 device_printf(sc->dev, "Failed to initialize RTC controller\n"); 107 return (ENXIO); 108 } 109 clock_register(sc->dev, 1000000); 110 111 return (0); 112 } 113