rtc.c revision 1.2.2.2
1 1.2.2.2 nathanw /* $NetBSD: rtc.c,v 1.2.2.2 2002/01/08 00:24:36 nathanw Exp $ */ 2 1.2.2.2 nathanw 3 1.2.2.2 nathanw /* 4 1.2.2.2 nathanw * Copyright (c) 1988 University of Utah. 5 1.2.2.2 nathanw * Copyright (c) 1982, 1990, 1993 6 1.2.2.2 nathanw * The Regents of the University of California. All rights reserved. 7 1.2.2.2 nathanw * 8 1.2.2.2 nathanw * This code is derived from software contributed to Berkeley by 9 1.2.2.2 nathanw * the Systems Programming Group of the University of Utah Computer 10 1.2.2.2 nathanw * Science Department. 11 1.2.2.2 nathanw * 12 1.2.2.2 nathanw * Redistribution and use in source and binary forms, with or without 13 1.2.2.2 nathanw * modification, are permitted provided that the following conditions 14 1.2.2.2 nathanw * are met: 15 1.2.2.2 nathanw * 1. Redistributions of source code must retain the above copyright 16 1.2.2.2 nathanw * notice, this list of conditions and the following disclaimer. 17 1.2.2.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 18 1.2.2.2 nathanw * notice, this list of conditions and the following disclaimer in the 19 1.2.2.2 nathanw * documentation and/or other materials provided with the distribution. 20 1.2.2.2 nathanw * 3. All advertising materials mentioning features or use of this software 21 1.2.2.2 nathanw * must display the following acknowledgement: 22 1.2.2.2 nathanw * This product includes software developed by the University of 23 1.2.2.2 nathanw * California, Berkeley and its contributors. 24 1.2.2.2 nathanw * 4. Neither the name of the University nor the names of its contributors 25 1.2.2.2 nathanw * may be used to endorse or promote products derived from this software 26 1.2.2.2 nathanw * without specific prior written permission. 27 1.2.2.2 nathanw * 28 1.2.2.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 1.2.2.2 nathanw * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 1.2.2.2 nathanw * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 1.2.2.2 nathanw * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 1.2.2.2 nathanw * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 1.2.2.2 nathanw * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 1.2.2.2 nathanw * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 1.2.2.2 nathanw * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 1.2.2.2 nathanw * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 1.2.2.2 nathanw * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 1.2.2.2 nathanw * SUCH DAMAGE. 39 1.2.2.2 nathanw * 40 1.2.2.2 nathanw * from: Utah $Hdr: clock.c 1.18 91/01/21$ 41 1.2.2.2 nathanw * 42 1.2.2.2 nathanw * @(#)clock.c 8.2 (Berkeley) 1/12/94 43 1.2.2.2 nathanw */ 44 1.2.2.2 nathanw 45 1.2.2.2 nathanw /* 46 1.2.2.2 nathanw * attachment for HP300 real-time clock (RTC) 47 1.2.2.2 nathanw */ 48 1.2.2.2 nathanw 49 1.2.2.2 nathanw #include <sys/param.h> 50 1.2.2.2 nathanw #include <sys/systm.h> 51 1.2.2.2 nathanw #include <sys/device.h> 52 1.2.2.2 nathanw #include <sys/malloc.h> 53 1.2.2.2 nathanw 54 1.2.2.2 nathanw #include <hp300/dev/intiovar.h> 55 1.2.2.2 nathanw #include <hp300/dev/rtcreg.h> 56 1.2.2.2 nathanw 57 1.2.2.2 nathanw #include <dev/clock_subr.h> 58 1.2.2.2 nathanw #include <hp300/hp300/clockvar.h> 59 1.2.2.2 nathanw 60 1.2.2.2 nathanw struct rtc_softc { 61 1.2.2.2 nathanw struct device sc_dev; 62 1.2.2.2 nathanw bus_space_tag_t sc_bst; 63 1.2.2.2 nathanw bus_space_handle_t sc_bsh; 64 1.2.2.2 nathanw }; 65 1.2.2.2 nathanw 66 1.2.2.2 nathanw static int rtcmatch(struct device *, struct cfdata *, void *); 67 1.2.2.2 nathanw static void rtcattach(struct device *, struct device *, void *aux); 68 1.2.2.2 nathanw 69 1.2.2.2 nathanw struct cfattach rtc_ca = { 70 1.2.2.2 nathanw sizeof (struct rtc_softc), rtcmatch, rtcattach, 71 1.2.2.2 nathanw }; 72 1.2.2.2 nathanw 73 1.2.2.2 nathanw static int rtc_gettime(todr_chip_handle_t, struct timeval *); 74 1.2.2.2 nathanw static int rtc_settime(todr_chip_handle_t, struct timeval *); 75 1.2.2.2 nathanw static int rtc_getcal(todr_chip_handle_t, int *); 76 1.2.2.2 nathanw static int rtc_setcal(todr_chip_handle_t, int); 77 1.2.2.2 nathanw static u_int8_t rtc_readreg(struct rtc_softc *, int); 78 1.2.2.2 nathanw static u_int8_t rtc_writereg(struct rtc_softc *, int, u_int8_t); 79 1.2.2.2 nathanw 80 1.2.2.2 nathanw 81 1.2.2.2 nathanw static int 82 1.2.2.2 nathanw rtcmatch(parent, match, aux) 83 1.2.2.2 nathanw struct device *parent; 84 1.2.2.2 nathanw struct cfdata *match; 85 1.2.2.2 nathanw void *aux; 86 1.2.2.2 nathanw { 87 1.2.2.2 nathanw struct intio_attach_args *ia = aux; 88 1.2.2.2 nathanw 89 1.2.2.2 nathanw if (strcmp("rtc ", ia->ia_modname) != 0) 90 1.2.2.2 nathanw return (0); 91 1.2.2.2 nathanw 92 1.2.2.2 nathanw return (1); 93 1.2.2.2 nathanw } 94 1.2.2.2 nathanw 95 1.2.2.2 nathanw static void 96 1.2.2.2 nathanw rtcattach(parent, self, aux) 97 1.2.2.2 nathanw struct device *parent, *self; 98 1.2.2.2 nathanw void *aux; 99 1.2.2.2 nathanw { 100 1.2.2.2 nathanw struct intio_attach_args *ia = aux; 101 1.2.2.2 nathanw struct rtc_softc *sc = (struct rtc_softc *)self; 102 1.2.2.2 nathanw struct todr_chip_handle *todr_handle; 103 1.2.2.2 nathanw 104 1.2.2.2 nathanw printf("\n"); 105 1.2.2.2 nathanw 106 1.2.2.2 nathanw if (bus_space_map(ia->ia_bst, ia->ia_iobase, INTIO_DEVSIZE, 0, 107 1.2.2.2 nathanw &sc->sc_bsh)) { 108 1.2.2.2 nathanw printf("%s: can't map registers\n", 109 1.2.2.2 nathanw sc->sc_dev.dv_xname); 110 1.2.2.2 nathanw return; 111 1.2.2.2 nathanw } 112 1.2.2.2 nathanw 113 1.2.2.2 nathanw todr_handle = malloc(sizeof(struct todr_chip_handle), 114 1.2.2.2 nathanw M_DEVBUF, M_NOWAIT); 115 1.2.2.2 nathanw 116 1.2.2.2 nathanw todr_handle->cookie = sc; 117 1.2.2.2 nathanw todr_handle->todr_gettime = rtc_gettime; 118 1.2.2.2 nathanw todr_handle->todr_settime = rtc_settime; 119 1.2.2.2 nathanw todr_handle->todr_getcal = rtc_getcal; 120 1.2.2.2 nathanw todr_handle->todr_setcal = rtc_setcal; 121 1.2.2.2 nathanw todr_handle->todr_setwen = NULL; 122 1.2.2.2 nathanw 123 1.2.2.2 nathanw clockattach(todr_handle); 124 1.2.2.2 nathanw } 125 1.2.2.2 nathanw 126 1.2.2.2 nathanw static int 127 1.2.2.2 nathanw rtc_gettime(todr_chip_handle_t handle, struct timeval *tv) 128 1.2.2.2 nathanw { 129 1.2.2.2 nathanw struct rtc_softc *sc = (struct rtc_softc *)handle->cookie; 130 1.2.2.2 nathanw int i, read_okay, year; 131 1.2.2.2 nathanw struct clock_ymdhms dt; 132 1.2.2.2 nathanw u_int8_t rtc_registers[NUM_RTC_REGS]; 133 1.2.2.2 nathanw 134 1.2.2.2 nathanw /* read rtc registers */ 135 1.2.2.2 nathanw read_okay = 0; 136 1.2.2.2 nathanw while (!read_okay) { 137 1.2.2.2 nathanw read_okay = 1; 138 1.2.2.2 nathanw for (i = 0; i < NUM_RTC_REGS; i++) 139 1.2.2.2 nathanw rtc_registers[i] = rtc_readreg(sc, i); 140 1.2.2.2 nathanw for (i = 0; i < NUM_RTC_REGS; i++) 141 1.2.2.2 nathanw if (rtc_registers[i] != rtc_readreg(sc, i)) 142 1.2.2.2 nathanw read_okay = 0; 143 1.2.2.2 nathanw } 144 1.2.2.2 nathanw 145 1.2.2.2 nathanw #define rtc_to_decimal(a,b) (rtc_registers[a] * 10 + rtc_registers[b]) 146 1.2.2.2 nathanw 147 1.2.2.2 nathanw dt.dt_sec = rtc_to_decimal(1, 0); 148 1.2.2.2 nathanw dt.dt_min = rtc_to_decimal(3, 2); 149 1.2.2.2 nathanw dt.dt_hour = (rtc_registers[5] & RTC_REG5_HOUR) * 10 + rtc_registers[4]; 150 1.2.2.2 nathanw dt.dt_day = rtc_to_decimal(8, 7); 151 1.2.2.2 nathanw dt.dt_mon = rtc_to_decimal(10, 9); 152 1.2.2.2 nathanw 153 1.2.2.2 nathanw year = rtc_to_decimal(12, 11) + RTC_BASE_YEAR; 154 1.2.2.2 nathanw if (year < POSIX_BASE_YEAR) 155 1.2.2.2 nathanw year += 100; 156 1.2.2.2 nathanw dt.dt_year = year; 157 1.2.2.2 nathanw 158 1.2.2.2 nathanw #undef rtc_to_decimal 159 1.2.2.2 nathanw 160 1.2.2.2 nathanw /* simple sanity checks */ 161 1.2.2.2 nathanw if (dt.dt_mon > 12 || dt.dt_day > 31 || 162 1.2.2.2 nathanw dt.dt_hour >= 24 || dt.dt_min >= 60 || dt.dt_sec >= 60) 163 1.2.2.2 nathanw return (1); 164 1.2.2.2 nathanw 165 1.2.2.2 nathanw tv->tv_sec = clock_ymdhms_to_secs(&dt); 166 1.2.2.2 nathanw tv->tv_usec = 0; 167 1.2.2.2 nathanw return (0); 168 1.2.2.2 nathanw } 169 1.2.2.2 nathanw 170 1.2.2.2 nathanw static int 171 1.2.2.2 nathanw rtc_settime(todr_chip_handle_t handle, struct timeval *tv) 172 1.2.2.2 nathanw { 173 1.2.2.2 nathanw struct rtc_softc *sc = (struct rtc_softc *)handle->cookie; 174 1.2.2.2 nathanw int i, year; 175 1.2.2.2 nathanw struct clock_ymdhms dt; 176 1.2.2.2 nathanw u_int8_t rtc_registers[NUM_RTC_REGS]; 177 1.2.2.2 nathanw 178 1.2.2.2 nathanw /* Note: we ignore `tv_usec' */ 179 1.2.2.2 nathanw clock_secs_to_ymdhms(tv->tv_sec, &dt); 180 1.2.2.2 nathanw 181 1.2.2.2 nathanw year = dt.dt_year - RTC_BASE_YEAR; 182 1.2.2.2 nathanw if (year > 99) 183 1.2.2.2 nathanw year -= 100; 184 1.2.2.2 nathanw 185 1.2.2.2 nathanw #define decimal_to_rtc(a,b,n) \ 186 1.2.2.2 nathanw rtc_registers[a] = (n) % 10; \ 187 1.2.2.2 nathanw rtc_registers[b] = (n) / 10; 188 1.2.2.2 nathanw 189 1.2.2.2 nathanw decimal_to_rtc(0, 1, dt.dt_sec); 190 1.2.2.2 nathanw decimal_to_rtc(2, 3, dt.dt_min); 191 1.2.2.2 nathanw decimal_to_rtc(7, 8, dt.dt_day); 192 1.2.2.2 nathanw decimal_to_rtc(9, 10, dt.dt_mon); 193 1.2.2.2 nathanw decimal_to_rtc(11, 12, year); 194 1.2.2.2 nathanw 195 1.2.2.2 nathanw rtc_registers[4] = dt.dt_hour % 10; 196 1.2.2.2 nathanw rtc_registers[5] = ((dt.dt_hour / 10) & RTC_REG5_HOUR) | RTC_REG5_24HR; 197 1.2.2.2 nathanw 198 1.2.2.2 nathanw rtc_registers[6] = 0; 199 1.2.2.2 nathanw 200 1.2.2.2 nathanw #undef decimal_to_rtc 201 1.2.2.2 nathanw 202 1.2.2.2 nathanw /* write rtc registers */ 203 1.2.2.2 nathanw rtc_writereg(sc, 15, 13); /* reset prescalar */ 204 1.2.2.2 nathanw for (i = 0; i < NUM_RTC_REGS; i++) 205 1.2.2.2 nathanw if (rtc_registers[i] != 206 1.2.2.2 nathanw rtc_writereg(sc, i, rtc_registers[i])) 207 1.2.2.2 nathanw return (1); 208 1.2.2.2 nathanw return (0); 209 1.2.2.2 nathanw } 210 1.2.2.2 nathanw 211 1.2.2.2 nathanw static int 212 1.2.2.2 nathanw rtc_getcal(todr_chip_handle_t handle, int *vp) 213 1.2.2.2 nathanw { 214 1.2.2.2 nathanw return (EOPNOTSUPP); 215 1.2.2.2 nathanw } 216 1.2.2.2 nathanw 217 1.2.2.2 nathanw static int 218 1.2.2.2 nathanw rtc_setcal(todr_chip_handle_t handle, int v) 219 1.2.2.2 nathanw { 220 1.2.2.2 nathanw return (EOPNOTSUPP); 221 1.2.2.2 nathanw } 222 1.2.2.2 nathanw 223 1.2.2.2 nathanw static u_int8_t 224 1.2.2.2 nathanw rtc_readreg(struct rtc_softc *sc, int reg) 225 1.2.2.2 nathanw { 226 1.2.2.2 nathanw bus_space_tag_t bst = sc->sc_bst; 227 1.2.2.2 nathanw bus_space_handle_t bsh = sc->sc_bsh; 228 1.2.2.2 nathanw u_int8_t data; 229 1.2.2.2 nathanw int s = splvm(); 230 1.2.2.2 nathanw 231 1.2.2.2 nathanw data = reg; 232 1.2.2.2 nathanw intio_device_writecmd(bst, bsh, RTC_SET_REG, &data, 1); 233 1.2.2.2 nathanw intio_device_readcmd(bst, bsh, RTC_READ_REG, &data); 234 1.2.2.2 nathanw 235 1.2.2.2 nathanw splx(s); 236 1.2.2.2 nathanw return (data); 237 1.2.2.2 nathanw } 238 1.2.2.2 nathanw 239 1.2.2.2 nathanw static u_int8_t 240 1.2.2.2 nathanw rtc_writereg(struct rtc_softc *sc, int reg, u_int8_t data) 241 1.2.2.2 nathanw { 242 1.2.2.2 nathanw bus_space_tag_t bst = sc->sc_bst; 243 1.2.2.2 nathanw bus_space_handle_t bsh = sc->sc_bsh; 244 1.2.2.2 nathanw u_int8_t tmp; 245 1.2.2.2 nathanw int s = splvm(); 246 1.2.2.2 nathanw 247 1.2.2.2 nathanw tmp = (data << 4) | reg; 248 1.2.2.2 nathanw intio_device_writecmd(bst, bsh, RTC_SET_REG, &tmp, 1); 249 1.2.2.2 nathanw intio_device_writecmd(bst, bsh, RTC_WRITE_REG, NULL, 0); 250 1.2.2.2 nathanw intio_device_readcmd(bst, bsh, RTC_READ_REG, &tmp); 251 1.2.2.2 nathanw 252 1.2.2.2 nathanw splx(s); 253 1.2.2.2 nathanw return (tmp); 254 1.2.2.2 nathanw } 255
Indexes created Sun Oct 12 05:10:08 GMT 2025