msm6242b.c revision 1.2.2.2
1 1.2.2.2 tls /* $NetBSD: msm6242b.c,v 1.2.2.2 2012/11/20 03:02:07 tls Exp $ */ 2 1.2.2.2 tls 3 1.2.2.2 tls /*- 4 1.2.2.2 tls * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 1.2.2.2 tls * All rights reserved. 6 1.2.2.2 tls * 7 1.2.2.2 tls * This code is derived from software contributed to The NetBSD Foundation 8 1.2.2.2 tls * by Radoslaw Kujawa. 9 1.2.2.2 tls * 10 1.2.2.2 tls * Redistribution and use in source and binary forms, with or without 11 1.2.2.2 tls * modification, are permitted provided that the following conditions 12 1.2.2.2 tls * are met: 13 1.2.2.2 tls * 1. Redistributions of source code must retain the above copyright 14 1.2.2.2 tls * notice, this list of conditions and the following disclaimer. 15 1.2.2.2 tls * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.2.2 tls * notice, this list of conditions and the following disclaimer in the 17 1.2.2.2 tls * documentation and/or other materials provided with the distribution. 18 1.2.2.2 tls * 19 1.2.2.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2.2.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2.2.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2.2.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2.2.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2.2.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2.2.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2.2.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2.2.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2.2.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2.2.2 tls * POSSIBILITY OF SUCH DAMAGE. 30 1.2.2.2 tls */ 31 1.2.2.2 tls 32 1.2.2.2 tls #include <sys/cdefs.h> 33 1.2.2.2 tls __KERNEL_RCSID(0, "$NetBSD: msm6242b.c,v 1.2.2.2 2012/11/20 03:02:07 tls Exp $"); 34 1.2.2.2 tls 35 1.2.2.2 tls /* 36 1.2.2.2 tls * Driver for OKI MSM6242B Real Time Clock. Somewhat based on an ancient, amiga 37 1.2.2.2 tls * specifc a2kbbc driver (which was turned into frontend to this driver). 38 1.2.2.2 tls */ 39 1.2.2.2 tls 40 1.2.2.2 tls #include <sys/param.h> 41 1.2.2.2 tls #include <sys/device.h> 42 1.2.2.2 tls #include <sys/bus.h> 43 1.2.2.2 tls 44 1.2.2.2 tls #include <dev/clock_subr.h> 45 1.2.2.2 tls 46 1.2.2.2 tls #include <dev/ic/msm6242bvar.h> 47 1.2.2.2 tls #include <dev/ic/msm6242breg.h> 48 1.2.2.2 tls 49 1.2.2.2 tls /* #define MSM6242B_DEBUG 1 */ 50 1.2.2.2 tls 51 1.2.2.2 tls static int msm6242b_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *); 52 1.2.2.2 tls int msm6242b_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *); 53 1.2.2.2 tls 54 1.2.2.2 tls bool msm6242b_hold(struct msm6242b_softc *sc); 55 1.2.2.2 tls void msm6242b_free(struct msm6242b_softc *sc); 56 1.2.2.2 tls static uint8_t msm6242b_read(struct msm6242b_softc *, uint8_t); 57 1.2.2.2 tls static void msm6242b_write(struct msm6242b_softc *, uint8_t, uint8_t); 58 1.2.2.2 tls static void msm6242b_set(struct msm6242b_softc *, uint8_t, uint8_t); 59 1.2.2.2 tls static void msm6242b_unset(struct msm6242b_softc *, uint8_t, uint8_t); 60 1.2.2.2 tls 61 1.2.2.2 tls void 62 1.2.2.2 tls msm6242b_attach(struct msm6242b_softc *sc) 63 1.2.2.2 tls { 64 1.2.2.2 tls struct clock_ymdhms dt; 65 1.2.2.2 tls 66 1.2.2.2 tls todr_chip_handle_t handle; 67 1.2.2.2 tls aprint_normal(": OKI MSM6242B\n"); 68 1.2.2.2 tls 69 1.2.2.2 tls handle = &sc->sc_handle; 70 1.2.2.2 tls handle->cookie = sc; 71 1.2.2.2 tls handle->todr_gettime = NULL; 72 1.2.2.2 tls handle->todr_settime = NULL; 73 1.2.2.2 tls handle->todr_gettime_ymdhms = msm6242b_gettime_ymdhms; 74 1.2.2.2 tls handle->todr_settime_ymdhms = msm6242b_settime_ymdhms; 75 1.2.2.2 tls handle->todr_setwen = NULL; 76 1.2.2.2 tls 77 1.2.2.2 tls if (msm6242b_gettime_ymdhms(handle, &dt) != 0) { 78 1.2.2.2 tls aprint_error_dev(sc->sc_dev, "RTC does not work correctly\n"); 79 1.2.2.2 tls return; 80 1.2.2.2 tls } 81 1.2.2.2 tls 82 1.2.2.2 tls #ifdef MSM6242B_DEBUG 83 1.2.2.2 tls aprint_normal_dev(sc->sc_dev, "the time is %d %d %d %d %d %d\n", 84 1.2.2.2 tls dt.dt_year, dt.dt_mon, dt.dt_day, dt.dt_hour, dt.dt_min, dt.dt_sec); 85 1.2.2.2 tls #endif /* MSM6242B_DEBUG */ 86 1.2.2.2 tls todr_attach(handle); 87 1.2.2.2 tls } 88 1.2.2.2 tls 89 1.2.2.2 tls static int 90 1.2.2.2 tls msm6242b_gettime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt) 91 1.2.2.2 tls { 92 1.2.2.2 tls struct msm6242b_softc *sc; 93 1.2.2.2 tls 94 1.2.2.2 tls sc = handle->cookie; 95 1.2.2.2 tls /* XXX: splsched(); */ 96 1.2.2.2 tls 97 1.2.2.2 tls if(!msm6242b_hold(sc)) 98 1.2.2.2 tls return (ENXIO); 99 1.2.2.2 tls 100 1.2.2.2 tls dt->dt_sec = msm6242b_read(sc, MSM6242B_10SECOND) * 10 + 101 1.2.2.2 tls msm6242b_read(sc, MSM6242B_1SECOND); 102 1.2.2.2 tls dt->dt_min = msm6242b_read(sc, MSM6242B_10MINUTE) * 10 + 103 1.2.2.2 tls msm6242b_read(sc, MSM6242B_1MINUTE); 104 1.2.2.2 tls dt->dt_hour = (msm6242b_read(sc, MSM6242B_10HOUR_PMAM) & 105 1.2.2.2 tls MSM6242B_10HOUR_MASK) * 10 + msm6242b_read(sc, MSM6242B_1HOUR); 106 1.2.2.2 tls dt->dt_day = msm6242b_read(sc, MSM6242B_10DAY) * 10 + 107 1.2.2.2 tls msm6242b_read(sc, MSM6242B_1DAY); 108 1.2.2.2 tls dt->dt_mon = msm6242b_read(sc, MSM6242B_10MONTH) * 10 + 109 1.2.2.2 tls msm6242b_read(sc, MSM6242B_1MONTH); 110 1.2.2.2 tls dt->dt_year = msm6242b_read(sc, MSM6242B_10YEAR) * 10 + 111 1.2.2.2 tls msm6242b_read(sc, MSM6242B_1YEAR); 112 1.2.2.2 tls dt->dt_wday = msm6242b_read(sc, MSM6242B_WEEK); 113 1.2.2.2 tls 114 1.2.2.2 tls #ifdef MSM6242B_DEBUG 115 1.2.2.2 tls aprint_normal_dev(sc->sc_dev, "the time is %d %d %d %d %d %d\n", 116 1.2.2.2 tls dt->dt_year, dt->dt_mon, dt->dt_day, dt->dt_hour, dt->dt_min, dt->dt_sec); 117 1.2.2.2 tls #endif /* MSM6242B_DEBUG */ 118 1.2.2.2 tls 119 1.2.2.2 tls /* handle 12h mode */ 120 1.2.2.2 tls if ((msm6242b_read(sc, MSM6242B_CONTROL_F) & 121 1.2.2.2 tls MSM6242B_CONTROL_F_24H) == 0) { 122 1.2.2.2 tls if ((msm6242b_read(sc, MSM6242B_10HOUR_PMAM) & 123 1.2.2.2 tls MSM6242B_PMAM_BIT) == 0 && dt->dt_hour == 12) 124 1.2.2.2 tls dt->dt_hour = 0; 125 1.2.2.2 tls else if ((msm6242b_read(sc, MSM6242B_10HOUR_PMAM) & 126 1.2.2.2 tls MSM6242B_PMAM_BIT) && dt->dt_hour != 12); 127 1.2.2.2 tls dt->dt_hour += 12; 128 1.2.2.2 tls } 129 1.2.2.2 tls 130 1.2.2.2 tls msm6242b_free(sc); 131 1.2.2.2 tls 132 1.2.2.2 tls dt->dt_year += MSM6242B_BASE_YEAR; 133 1.2.2.2 tls if (dt->dt_year < POSIX_BASE_YEAR) 134 1.2.2.2 tls dt->dt_year += 100; 135 1.2.2.2 tls 136 1.2.2.2 tls if ((dt->dt_hour > 23) || 137 1.2.2.2 tls (dt->dt_day > 31) || 138 1.2.2.2 tls (dt->dt_mon > 12) || 139 1.2.2.2 tls (dt->dt_year > 2036)) 140 1.2.2.2 tls return (EINVAL); 141 1.2.2.2 tls 142 1.2.2.2 tls return 0; 143 1.2.2.2 tls } 144 1.2.2.2 tls 145 1.2.2.2 tls bool 146 1.2.2.2 tls msm6242b_hold(struct msm6242b_softc *sc) 147 1.2.2.2 tls { 148 1.2.2.2 tls int try; 149 1.2.2.2 tls 150 1.2.2.2 tls #define TRY_MAX 10 151 1.2.2.2 tls for (try = 0; try < TRY_MAX; try++) { 152 1.2.2.2 tls msm6242b_set(sc, MSM6242B_CONTROL_D, MSM6242B_CONTROL_D_HOLD); 153 1.2.2.2 tls if (msm6242b_read(sc, MSM6242B_CONTROL_D) 154 1.2.2.2 tls & MSM6242B_CONTROL_D_BUSY) { 155 1.2.2.2 tls #ifdef MSM6242B_DEBUG 156 1.2.2.2 tls aprint_normal_dev(sc->sc_dev, "gotta idle\n"); 157 1.2.2.2 tls #endif /* MSM6242B_DEBUG */ 158 1.2.2.2 tls msm6242b_unset(sc, MSM6242B_CONTROL_D, 159 1.2.2.2 tls MSM6242B_CONTROL_D_HOLD); 160 1.2.2.2 tls delay(70); 161 1.2.2.2 tls } else { 162 1.2.2.2 tls #ifdef MSM6242B_DEBUG 163 1.2.2.2 tls aprint_normal_dev(sc->sc_dev, "not busy\n"); 164 1.2.2.2 tls #endif /* MSM6242B_DEBUG */ 165 1.2.2.2 tls break; 166 1.2.2.2 tls } 167 1.2.2.2 tls } 168 1.2.2.2 tls 169 1.2.2.2 tls if (try == TRY_MAX) { 170 1.2.2.2 tls aprint_error_dev(sc->sc_dev, "can't hold the chip\n"); 171 1.2.2.2 tls return false; 172 1.2.2.2 tls } 173 1.2.2.2 tls return true; 174 1.2.2.2 tls } 175 1.2.2.2 tls 176 1.2.2.2 tls void 177 1.2.2.2 tls msm6242b_free(struct msm6242b_softc *sc) 178 1.2.2.2 tls { 179 1.2.2.2 tls msm6242b_unset(sc, MSM6242B_CONTROL_D, MSM6242B_CONTROL_D_HOLD); 180 1.2.2.2 tls } 181 1.2.2.2 tls 182 1.2.2.2 tls static uint8_t 183 1.2.2.2 tls msm6242b_read(struct msm6242b_softc *sc, uint8_t reg) 184 1.2.2.2 tls { 185 1.2.2.2 tls uint8_t r; 186 1.2.2.2 tls r = bus_space_read_1(sc->sc_iot, sc->sc_ioh, reg) & MSM6242B_MASK; 187 1.2.2.2 tls return r; 188 1.2.2.2 tls } 189 1.2.2.2 tls 190 1.2.2.2 tls static void 191 1.2.2.2 tls msm6242b_write(struct msm6242b_softc *sc, uint8_t reg, uint8_t val) 192 1.2.2.2 tls { 193 1.2.2.2 tls bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val); 194 1.2.2.2 tls } 195 1.2.2.2 tls 196 1.2.2.2 tls static void 197 1.2.2.2 tls msm6242b_set(struct msm6242b_softc *sc, uint8_t reg, uint8_t bits) 198 1.2.2.2 tls { 199 1.2.2.2 tls uint8_t v; 200 1.2.2.2 tls v = msm6242b_read(sc, reg) | bits; 201 1.2.2.2 tls msm6242b_write(sc, reg, v); 202 1.2.2.2 tls } 203 1.2.2.2 tls 204 1.2.2.2 tls static void 205 1.2.2.2 tls msm6242b_unset(struct msm6242b_softc *sc, uint8_t reg, uint8_t bits) 206 1.2.2.2 tls { 207 1.2.2.2 tls uint8_t v; 208 1.2.2.2 tls v = msm6242b_read(sc, reg) & ~bits; 209 1.2.2.2 tls msm6242b_write(sc, reg, v); 210 1.2.2.2 tls } 211 1.2.2.2 tls 212 1.2.2.2 tls int 213 1.2.2.2 tls msm6242b_settime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt) 214 1.2.2.2 tls { 215 1.2.2.2 tls struct msm6242b_softc *sc; 216 1.2.2.2 tls int ampm; 217 1.2.2.2 tls /* XXX: splsched(); */ 218 1.2.2.2 tls 219 1.2.2.2 tls sc = handle->cookie; 220 1.2.2.2 tls 221 1.2.2.2 tls if(!msm6242b_hold(sc)) 222 1.2.2.2 tls return (ENXIO); 223 1.2.2.2 tls 224 1.2.2.2 tls ampm = 0; 225 1.2.2.2 tls if ((msm6242b_read(sc, MSM6242B_CONTROL_F) & 226 1.2.2.2 tls MSM6242B_CONTROL_F_24H) == 0) { 227 1.2.2.2 tls if (dt->dt_hour >= 12) { 228 1.2.2.2 tls ampm = MSM6242B_CONTROL_F_24H; 229 1.2.2.2 tls if (dt->dt_hour != 12) 230 1.2.2.2 tls dt->dt_hour -= 12; 231 1.2.2.2 tls } else if (dt->dt_hour == 0) { 232 1.2.2.2 tls dt->dt_hour = 12; 233 1.2.2.2 tls } 234 1.2.2.2 tls } 235 1.2.2.2 tls 236 1.2.2.2 tls msm6242b_write(sc, MSM6242B_10HOUR_PMAM, (dt->dt_hour / 10) | ampm); 237 1.2.2.2 tls msm6242b_write(sc, MSM6242B_1HOUR, dt->dt_hour % 10); 238 1.2.2.2 tls msm6242b_write(sc, MSM6242B_10SECOND, dt->dt_sec / 10); 239 1.2.2.2 tls msm6242b_write(sc, MSM6242B_1SECOND, dt->dt_sec % 10); 240 1.2.2.2 tls msm6242b_write(sc, MSM6242B_10MINUTE, dt->dt_min / 10); 241 1.2.2.2 tls msm6242b_write(sc, MSM6242B_1MINUTE, dt->dt_min % 10); 242 1.2.2.2 tls msm6242b_write(sc, MSM6242B_10DAY, dt->dt_day / 10); 243 1.2.2.2 tls msm6242b_write(sc, MSM6242B_1DAY, dt->dt_day % 10); 244 1.2.2.2 tls msm6242b_write(sc, MSM6242B_10MONTH, dt->dt_mon / 10); 245 1.2.2.2 tls msm6242b_write(sc, MSM6242B_1MONTH, dt->dt_mon % 10); 246 1.2.2.2 tls msm6242b_write(sc, MSM6242B_10YEAR, (dt->dt_mon / 10) % 10); 247 1.2.2.2 tls msm6242b_write(sc, MSM6242B_1YEAR, dt->dt_mon % 10); 248 1.2.2.2 tls msm6242b_write(sc, MSM6242B_WEEK, dt->dt_wday); 249 1.2.2.2 tls 250 1.2.2.2 tls msm6242b_free(sc); 251 1.2.2.2 tls 252 1.2.2.2 tls return 0; 253 1.2.2.2 tls } 254 1.2.2.2 tls 255
Indexes created Mon Oct 27 20:09:55 GMT 2025