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/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/bus.h> 33 #include <sys/clock.h> 34 #include <sys/kernel.h> 35 36 #include <dev/ofw/ofw_bus.h> 37 38 #include "clock_if.h" 39 #include "as3722.h" 40 41 #define AS3722_RTC_START_YEAR 2000 42 43 int 44 as3722_rtc_gettime(device_t dev, struct timespec *ts) 45 { 46 struct as3722_softc *sc; 47 struct clocktime ct; 48 uint8_t buf[6]; 49 int rv; 50 51 sc = device_get_softc(dev); 52 53 rv = as3722_read_buf(sc, AS3722_RTC_SECOND, buf, 6); 54 if (rv != 0) { 55 device_printf(sc->dev, "Failed to read RTC data\n"); 56 return (rv); 57 } 58 ct.nsec = 0; 59 ct.sec = bcd2bin(buf[0] & 0x7F); 60 ct.min = bcd2bin(buf[1] & 0x7F); 61 ct.hour = bcd2bin(buf[2] & 0x3F); 62 ct.day = bcd2bin(buf[3] & 0x3F); 63 ct.mon = bcd2bin(buf[4] & 0x1F); 64 ct.year = bcd2bin(buf[5] & 0x7F) + AS3722_RTC_START_YEAR; 65 ct.dow = -1; 66 67 return clock_ct_to_ts(&ct, ts); 68 } 69 70 int 71 as3722_rtc_settime(device_t dev, struct timespec *ts) 72 { 73 struct as3722_softc *sc; 74 struct clocktime ct; 75 uint8_t buf[6]; 76 int rv; 77 78 sc = device_get_softc(dev); 79 clock_ts_to_ct(ts, &ct); 80 81 if (ct.year < AS3722_RTC_START_YEAR) 82 return (EINVAL); 83 84 buf[0] = bin2bcd(ct.sec); 85 buf[1] = bin2bcd(ct.min); 86 buf[2] = bin2bcd(ct.hour); 87 buf[3] = bin2bcd(ct.day); 88 buf[4] = bin2bcd(ct.mon); 89 buf[5] = bin2bcd(ct.year - AS3722_RTC_START_YEAR); 90 91 rv = as3722_write_buf(sc, AS3722_RTC_SECOND, buf, 6); 92 if (rv != 0) { 93 device_printf(sc->dev, "Failed to write RTC data\n"); 94 return (rv); 95 } 96 return (0); 97 } 98 99 int 100 as3722_rtc_attach(struct as3722_softc *sc, phandle_t node) 101 { 102 int rv; 103 104 /* Enable RTC, set 24 hours mode and alarms */ 105 rv = RM1(sc, AS3722_RTC_CONTROL, 106 AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN | AS3722_RTC_AM_PM_MODE, 107 AS3722_RTC_ON | AS3722_RTC_ALARM_WAKEUP_EN); 108 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