rtc.c revision 1.1.2.2
1 1.1.2.2 yamt /*- 2 1.1.2.2 yamt * Copyright (c) 2002 The NetBSD Foundation, Inc. 3 1.1.2.2 yamt * All rights reserved. 4 1.1.2.2 yamt * 5 1.1.2.2 yamt * This code is derived from software contributed to The NetBSD Foundation 6 1.1.2.2 yamt * by UCHIYAMA Yasushi. 7 1.1.2.2 yamt * 8 1.1.2.2 yamt * Redistribution and use in source and binary forms, with or without 9 1.1.2.2 yamt * modification, are permitted provided that the following conditions 10 1.1.2.2 yamt * are met: 11 1.1.2.2 yamt * 1. Redistributions of source code must retain the above copyright 12 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer. 13 1.1.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 14 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer in the 15 1.1.2.2 yamt * documentation and/or other materials provided with the distribution. 16 1.1.2.2 yamt * 3. All advertising materials mentioning features or use of this software 17 1.1.2.2 yamt * must display the following acknowledgement: 18 1.1.2.2 yamt * This product includes software developed by the NetBSD 19 1.1.2.2 yamt * Foundation, Inc. and its contributors. 20 1.1.2.2 yamt * 4. Neither the name of The NetBSD Foundation nor the names of its 21 1.1.2.2 yamt * contributors may be used to endorse or promote products derived 22 1.1.2.2 yamt * from this software without specific prior written permission. 23 1.1.2.2 yamt * 24 1.1.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 25 1.1.2.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 26 1.1.2.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 27 1.1.2.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 28 1.1.2.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 1.1.2.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 1.1.2.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 1.1.2.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 1.1.2.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 1.1.2.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 1.1.2.2 yamt * POSSIBILITY OF SUCH DAMAGE. 35 1.1.2.2 yamt */ 36 1.1.2.2 yamt 37 1.1.2.2 yamt #include <sys/cdefs.h> 38 1.1.2.2 yamt __KERNEL_RCSID(0, "$NetBSD: rtc.c,v 1.1.2.2 2006/10/22 06:04:59 yamt Exp $"); 39 1.1.2.2 yamt 40 1.1.2.2 yamt #include <sys/param.h> 41 1.1.2.2 yamt #include <sys/kernel.h> 42 1.1.2.2 yamt #include <sys/device.h> 43 1.1.2.2 yamt #include <sys/malloc.h> 44 1.1.2.2 yamt #include <sys/systm.h> 45 1.1.2.2 yamt #ifdef GPROF 46 1.1.2.2 yamt #include <sys/gmon.h> 47 1.1.2.2 yamt #endif 48 1.1.2.2 yamt 49 1.1.2.2 yamt #include <dev/clock_subr.h> 50 1.1.2.2 yamt 51 1.1.2.2 yamt #include <sh3/rtcreg.h> 52 1.1.2.2 yamt 53 1.1.2.2 yamt 54 1.1.2.2 yamt struct rtc_softc { 55 1.1.2.2 yamt struct device sc_dev; 56 1.1.2.2 yamt 57 1.1.2.2 yamt struct todr_chip_handle sc_todr; 58 1.1.2.2 yamt }; 59 1.1.2.2 yamt 60 1.1.2.2 yamt static int rtc_match(struct device *, struct cfdata *, void *); 61 1.1.2.2 yamt static void rtc_attach(struct device *, struct device *, void *); 62 1.1.2.2 yamt 63 1.1.2.2 yamt CFATTACH_DECL(rtc, sizeof(struct rtc_softc), 64 1.1.2.2 yamt rtc_match, rtc_attach, NULL, NULL); 65 1.1.2.2 yamt 66 1.1.2.2 yamt 67 1.1.2.2 yamt /* todr(9) methods */ 68 1.1.2.2 yamt static int rtc_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *); 69 1.1.2.2 yamt static int rtc_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *); 70 1.1.2.2 yamt 71 1.1.2.2 yamt 72 1.1.2.2 yamt 73 1.1.2.2 yamt static int 74 1.1.2.2 yamt rtc_match(struct device *parent, struct cfdata *cfp, void *aux) 75 1.1.2.2 yamt { 76 1.1.2.2 yamt 77 1.1.2.2 yamt return 1; 78 1.1.2.2 yamt } 79 1.1.2.2 yamt 80 1.1.2.2 yamt 81 1.1.2.2 yamt static void 82 1.1.2.2 yamt rtc_attach(struct device *parent, struct device *self, void *aux) 83 1.1.2.2 yamt { 84 1.1.2.2 yamt struct rtc_softc *sc = (void *)self; 85 1.1.2.2 yamt 86 1.1.2.2 yamt printf("\n"); 87 1.1.2.2 yamt 88 1.1.2.2 yamt /* Make sure RTC is started */ 89 1.1.2.2 yamt _reg_write_1(SH_(RCR2), SH_RCR2_ENABLE | SH_RCR2_START); 90 1.1.2.2 yamt 91 1.1.2.2 yamt #ifdef RTC_DEBUG 92 1.1.2.2 yamt { 93 1.1.2.2 yamt struct clock_ymdhms dt; 94 1.1.2.2 yamt int error; 95 1.1.2.2 yamt 96 1.1.2.2 yamt error = rtc_gettime_ymdhms(NULL, &dt); 97 1.1.2.2 yamt if (error) 98 1.1.2.2 yamt printf("%s: error %d\n", sc->sc_dev.dv_xname, error); 99 1.1.2.2 yamt else 100 1.1.2.2 yamt printf("%s: %04d-%02d-%02d %02d:%02d:%02d\n", 101 1.1.2.2 yamt sc->sc_dev.dv_xname, 102 1.1.2.2 yamt dt.dt_year, dt.dt_mon, dt.dt_day, 103 1.1.2.2 yamt dt.dt_hour, dt.dt_min, dt.dt_sec); 104 1.1.2.2 yamt } 105 1.1.2.2 yamt #endif 106 1.1.2.2 yamt sc->sc_todr.cookie = sc; 107 1.1.2.2 yamt sc->sc_todr.todr_gettime_ymdhms = rtc_gettime_ymdhms; 108 1.1.2.2 yamt sc->sc_todr.todr_settime_ymdhms = rtc_settime_ymdhms; 109 1.1.2.2 yamt 110 1.1.2.2 yamt todr_attach(&sc->sc_todr); 111 1.1.2.2 yamt } 112 1.1.2.2 yamt 113 1.1.2.2 yamt 114 1.1.2.2 yamt static int 115 1.1.2.2 yamt rtc_gettime_ymdhms(todr_chip_handle_t h, struct clock_ymdhms *dt) 116 1.1.2.2 yamt { 117 1.1.2.2 yamt unsigned int year; 118 1.1.2.2 yamt int retry = 8; 119 1.1.2.2 yamt 120 1.1.2.2 yamt /* disable carry interrupt */ 121 1.1.2.2 yamt _reg_bclr_1(SH_(RCR1), SH_RCR1_CIE); 122 1.1.2.2 yamt 123 1.1.2.2 yamt do { 124 1.1.2.2 yamt uint8_t r = _reg_read_1(SH_(RCR1)); 125 1.1.2.2 yamt r &= ~SH_RCR1_CF; 126 1.1.2.2 yamt r |= SH_RCR1_AF; /* don't clear alarm flag */ 127 1.1.2.2 yamt _reg_write_1(SH_(RCR1), r); 128 1.1.2.2 yamt 129 1.1.2.2 yamt if (CPU_IS_SH3) 130 1.1.2.2 yamt year = _reg_read_1(SH3_RYRCNT); 131 1.1.2.2 yamt else 132 1.1.2.2 yamt year = _reg_read_2(SH4_RYRCNT) & 0x00ff; 133 1.1.2.2 yamt dt->dt_year = FROMBCD(year); 134 1.1.2.2 yamt 135 1.1.2.2 yamt /* read counter */ 136 1.1.2.2 yamt #define RTCGET(x, y) \ 137 1.1.2.2 yamt dt->dt_ ## x = FROMBCD(_reg_read_1(SH_(R ## y ## CNT))) 138 1.1.2.2 yamt 139 1.1.2.2 yamt RTCGET(mon, MON); 140 1.1.2.2 yamt RTCGET(wday, WK); 141 1.1.2.2 yamt RTCGET(day, DAY); 142 1.1.2.2 yamt RTCGET(hour, HR); 143 1.1.2.2 yamt RTCGET(min, MIN); 144 1.1.2.2 yamt RTCGET(sec, SEC); 145 1.1.2.2 yamt #undef RTCGET 146 1.1.2.2 yamt } while ((_reg_read_1(SH_(RCR1)) & SH_RCR1_CF) && --retry > 0); 147 1.1.2.2 yamt 148 1.1.2.2 yamt if (retry == 0) 149 1.1.2.2 yamt return EIO; 150 1.1.2.2 yamt 151 1.1.2.2 yamt dt->dt_year += 1900; 152 1.1.2.2 yamt if (dt->dt_year < POSIX_BASE_YEAR) 153 1.1.2.2 yamt dt->dt_year += 100; 154 1.1.2.2 yamt 155 1.1.2.2 yamt return 0; 156 1.1.2.2 yamt } 157 1.1.2.2 yamt 158 1.1.2.2 yamt 159 1.1.2.2 yamt static int 160 1.1.2.2 yamt rtc_settime_ymdhms(todr_chip_handle_t h, struct clock_ymdhms *dt) 161 1.1.2.2 yamt { 162 1.1.2.2 yamt unsigned int year; 163 1.1.2.2 yamt uint8_t r; 164 1.1.2.2 yamt 165 1.1.2.2 yamt year = TOBCD(dt->dt_year % 100); 166 1.1.2.2 yamt 167 1.1.2.2 yamt /* stop clock */ 168 1.1.2.2 yamt r = _reg_read_1(SH_(RCR2)); 169 1.1.2.2 yamt r |= SH_RCR2_RESET; 170 1.1.2.2 yamt r &= ~SH_RCR2_START; 171 1.1.2.2 yamt _reg_write_1(SH_(RCR2), r); 172 1.1.2.2 yamt 173 1.1.2.2 yamt /* set time */ 174 1.1.2.2 yamt if (CPU_IS_SH3) 175 1.1.2.2 yamt _reg_write_1(SH3_RYRCNT, year); 176 1.1.2.2 yamt else 177 1.1.2.2 yamt _reg_write_2(SH4_RYRCNT, year); 178 1.1.2.2 yamt 179 1.1.2.2 yamt #define RTCSET(x, y) \ 180 1.1.2.2 yamt _reg_write_1(SH_(R ## x ## CNT), TOBCD(dt->dt_ ## y)) 181 1.1.2.2 yamt 182 1.1.2.2 yamt RTCSET(MON, mon); 183 1.1.2.2 yamt RTCSET(WK, wday); 184 1.1.2.2 yamt RTCSET(DAY, day); 185 1.1.2.2 yamt RTCSET(HR, hour); 186 1.1.2.2 yamt RTCSET(MIN, min); 187 1.1.2.2 yamt RTCSET(SEC, sec); 188 1.1.2.2 yamt 189 1.1.2.2 yamt #undef RTCSET 190 1.1.2.2 yamt 191 1.1.2.2 yamt /* start clock */ 192 1.1.2.2 yamt _reg_write_1(SH_(RCR2), r | SH_RCR2_START); 193 1.1.2.2 yamt 194 1.1.2.2 yamt return 0; 195 1.1.2.2 yamt } 196
Indexes created Fri Oct 03 02:09:57 GMT 2025