/* $NetBSD: msm6242b.c,v 1.3 2013/12/04 07:48:59 rkujawa Exp $ */ /*- * Copyright (c) 2012 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Radoslaw Kujawa. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: msm6242b.c,v 1.3 2013/12/04 07:48:59 rkujawa Exp $"); /* * Driver for OKI MSM6242B Real Time Clock. Somewhat based on an ancient, amiga * specifc a2kbbc driver (which was turned into frontend to this driver). */ #include #include #include #include #include #include /* #define MSM6242B_DEBUG 1 */ static int msm6242b_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *); int msm6242b_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *); bool msm6242b_hold(struct msm6242b_softc *sc); void msm6242b_free(struct msm6242b_softc *sc); static uint8_t msm6242b_read(struct msm6242b_softc *, uint8_t); static void msm6242b_write(struct msm6242b_softc *, uint8_t, uint8_t); static void msm6242b_set(struct msm6242b_softc *, uint8_t, uint8_t); static void msm6242b_unset(struct msm6242b_softc *, uint8_t, uint8_t); void msm6242b_attach(struct msm6242b_softc *sc) { struct clock_ymdhms dt; todr_chip_handle_t handle; aprint_normal(": OKI MSM6242B\n"); handle = &sc->sc_handle; handle->cookie = sc; handle->todr_gettime = NULL; handle->todr_settime = NULL; handle->todr_gettime_ymdhms = msm6242b_gettime_ymdhms; handle->todr_settime_ymdhms = msm6242b_settime_ymdhms; handle->todr_setwen = NULL; if (msm6242b_gettime_ymdhms(handle, &dt) != 0) { aprint_error_dev(sc->sc_dev, "RTC does not work correctly\n"); return; } #ifdef MSM6242B_DEBUG aprint_normal_dev(sc->sc_dev, "the time is %d %d %d %d %d %d\n", dt.dt_year, dt.dt_mon, dt.dt_day, dt.dt_hour, dt.dt_min, dt.dt_sec); #endif /* MSM6242B_DEBUG */ todr_attach(handle); } static int msm6242b_gettime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt) { struct msm6242b_softc *sc; sc = handle->cookie; /* XXX: splsched(); */ if(!msm6242b_hold(sc)) return (ENXIO); dt->dt_sec = msm6242b_read(sc, MSM6242B_10SECOND) * 10 + msm6242b_read(sc, MSM6242B_1SECOND); dt->dt_min = msm6242b_read(sc, MSM6242B_10MINUTE) * 10 + msm6242b_read(sc, MSM6242B_1MINUTE); dt->dt_hour = (msm6242b_read(sc, MSM6242B_10HOUR_PMAM) & MSM6242B_10HOUR_MASK) * 10 + msm6242b_read(sc, MSM6242B_1HOUR); dt->dt_day = msm6242b_read(sc, MSM6242B_10DAY) * 10 + msm6242b_read(sc, MSM6242B_1DAY); dt->dt_mon = msm6242b_read(sc, MSM6242B_10MONTH) * 10 + msm6242b_read(sc, MSM6242B_1MONTH); dt->dt_year = msm6242b_read(sc, MSM6242B_10YEAR) * 10 + msm6242b_read(sc, MSM6242B_1YEAR); dt->dt_wday = msm6242b_read(sc, MSM6242B_WEEK); #ifdef MSM6242B_DEBUG aprint_normal_dev(sc->sc_dev, "the time is %d %d %d %d %d %d\n", dt->dt_year, dt->dt_mon, dt->dt_day, dt->dt_hour, dt->dt_min, dt->dt_sec); #endif /* MSM6242B_DEBUG */ /* handle 12h mode */ if ((msm6242b_read(sc, MSM6242B_CONTROL_F) & MSM6242B_CONTROL_F_24H) == 0) { if ((msm6242b_read(sc, MSM6242B_10HOUR_PMAM) & MSM6242B_PMAM_BIT) == 0 && dt->dt_hour == 12) dt->dt_hour = 0; else if ((msm6242b_read(sc, MSM6242B_10HOUR_PMAM) & MSM6242B_PMAM_BIT) && dt->dt_hour != 12); dt->dt_hour += 12; } msm6242b_free(sc); dt->dt_year += MSM6242B_BASE_YEAR; if (dt->dt_year < POSIX_BASE_YEAR) dt->dt_year += 100; if ((dt->dt_hour > 23) || (dt->dt_day > 31) || (dt->dt_mon > 12) || (dt->dt_year > 2036)) return (EINVAL); return 0; } bool msm6242b_hold(struct msm6242b_softc *sc) { int try; #define TRY_MAX 10 for (try = 0; try < TRY_MAX; try++) { msm6242b_set(sc, MSM6242B_CONTROL_D, MSM6242B_CONTROL_D_HOLD); if (msm6242b_read(sc, MSM6242B_CONTROL_D) & MSM6242B_CONTROL_D_BUSY) { #ifdef MSM6242B_DEBUG aprint_normal_dev(sc->sc_dev, "gotta idle\n"); #endif /* MSM6242B_DEBUG */ msm6242b_unset(sc, MSM6242B_CONTROL_D, MSM6242B_CONTROL_D_HOLD); delay(70); } else { #ifdef MSM6242B_DEBUG aprint_normal_dev(sc->sc_dev, "not busy\n"); #endif /* MSM6242B_DEBUG */ break; } } if (try == TRY_MAX) { aprint_error_dev(sc->sc_dev, "can't hold the chip\n"); return false; } return true; } void msm6242b_free(struct msm6242b_softc *sc) { msm6242b_unset(sc, MSM6242B_CONTROL_D, MSM6242B_CONTROL_D_HOLD); } static uint8_t msm6242b_read(struct msm6242b_softc *sc, uint8_t reg) { uint8_t r; r = bus_space_read_1(sc->sc_iot, sc->sc_ioh, reg) & MSM6242B_MASK; return r; } static void msm6242b_write(struct msm6242b_softc *sc, uint8_t reg, uint8_t val) { bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val); } static void msm6242b_set(struct msm6242b_softc *sc, uint8_t reg, uint8_t bits) { uint8_t v; v = msm6242b_read(sc, reg) | bits; msm6242b_write(sc, reg, v); } static void msm6242b_unset(struct msm6242b_softc *sc, uint8_t reg, uint8_t bits) { uint8_t v; v = msm6242b_read(sc, reg) & ~bits; msm6242b_write(sc, reg, v); } int msm6242b_settime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt) { struct msm6242b_softc *sc; int ampm; /* XXX: splsched(); */ sc = handle->cookie; if(!msm6242b_hold(sc)) return (ENXIO); ampm = 0; if ((msm6242b_read(sc, MSM6242B_CONTROL_F) & MSM6242B_CONTROL_F_24H) == 0) { if (dt->dt_hour >= 12) { ampm = MSM6242B_CONTROL_F_24H; if (dt->dt_hour != 12) dt->dt_hour -= 12; } else if (dt->dt_hour == 0) { dt->dt_hour = 12; } } msm6242b_write(sc, MSM6242B_10HOUR_PMAM, (dt->dt_hour / 10) | ampm); msm6242b_write(sc, MSM6242B_1HOUR, dt->dt_hour % 10); msm6242b_write(sc, MSM6242B_10SECOND, dt->dt_sec / 10); msm6242b_write(sc, MSM6242B_1SECOND, dt->dt_sec % 10); msm6242b_write(sc, MSM6242B_10MINUTE, dt->dt_min / 10); msm6242b_write(sc, MSM6242B_1MINUTE, dt->dt_min % 10); msm6242b_write(sc, MSM6242B_10DAY, dt->dt_day / 10); msm6242b_write(sc, MSM6242B_1DAY, dt->dt_day % 10); msm6242b_write(sc, MSM6242B_10MONTH, dt->dt_mon / 10); msm6242b_write(sc, MSM6242B_1MONTH, dt->dt_mon % 10); msm6242b_write(sc, MSM6242B_10YEAR, (dt->dt_year / 10) % 10); msm6242b_write(sc, MSM6242B_1YEAR, dt->dt_year % 10); msm6242b_write(sc, MSM6242B_WEEK, dt->dt_wday); msm6242b_free(sc); return 0; }