/* $NetBSD: dsclock.c,v 1.7 2015/02/18 16:47:58 macallan Exp $ */ /* * Copyright (c) 2001 Rafal K. Boni * Copyright (c) 2001 Christopher Sekiya * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc. * All rights reserved. * * Portions of this code are derived from software contributed to The * NetBSD Foundation by Jason R. Thorpe of the Numerical Aerospace * Simulation Facility, NASA Ames Research Center. * * 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. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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: dsclock.c,v 1.7 2015/02/18 16:47:58 macallan Exp $"); #include #include #include #include #include #include #include #include #include #include #include struct dsclock_softc { device_t sc_dev; struct todr_chip_handle sc_todrch; /* RTC registers */ bus_space_tag_t sc_rtct; bus_space_handle_t sc_rtch; }; static int dsclock_match(device_t, cfdata_t, void *); static void dsclock_attach(device_t, device_t, void *); static int dsclock_gettime_ymdhms(struct todr_chip_handle *, struct clock_ymdhms *); static int dsclock_settime_ymdhms(struct todr_chip_handle *, struct clock_ymdhms *); CFATTACH_DECL_NEW(dsclock, sizeof(struct dsclock_softc), dsclock_match, dsclock_attach, NULL, NULL); #define ds1286_write(sc, reg, datum) \ bus_space_write_1((sc)->sc_rtct, (sc)->sc_rtch, (reg << 2) + 3, (datum)) #define ds1286_read(sc, reg) \ bus_space_read_1((sc)->sc_rtct, (sc)->sc_rtch, (reg << 2) + 3) static int dsclock_match(device_t parent, cfdata_t cf, void *aux) { struct mainbus_attach_args *ma = aux; if (mach_type == MACH_SGI_IP22 && ma->ma_addr == 0x1fbe0000) return 1; return 0; } static void dsclock_attach(device_t parent, device_t self, void *aux) { struct dsclock_softc *sc = device_private(self); struct mainbus_attach_args *ma = aux; int err; aprint_normal("\n"); sc->sc_rtct = normal_memt; if ((err = bus_space_map(sc->sc_rtct, ma->ma_addr, 0x1ffff, BUS_SPACE_MAP_LINEAR, &sc->sc_rtch)) != 0) { aprint_error_dev(self, "unable to map RTC registers, error = %d\n", err); return; } sc->sc_todrch.cookie = sc; sc->sc_todrch.todr_gettime_ymdhms = dsclock_gettime_ymdhms; sc->sc_todrch.todr_settime_ymdhms = dsclock_settime_ymdhms; sc->sc_todrch.todr_setwen = NULL; todr_attach(&sc->sc_todrch); } /* * Get the time of day, based on the clock's value and/or the base value. */ static int dsclock_gettime_ymdhms(struct todr_chip_handle *todrch, struct clock_ymdhms *dt) { struct dsclock_softc *sc = todrch->cookie; ds1286_todregs regs; int s; s = splhigh(); DS1286_GETTOD(sc, ®s) splx(s); dt->dt_sec = bcdtobin(regs[DS1286_SEC]); dt->dt_min = bcdtobin(regs[DS1286_MIN]); if (regs[DS1286_HOUR] & DS1286_HOUR_12MODE) { dt->dt_hour = bcdtobin(regs[DS1286_HOUR] & DS1286_HOUR_12HR_MASK) + ((regs[DS1286_HOUR] & DS1286_HOUR_12HR_PM) ? 12 : 0); /* * In AM/PM mode, hour range is 01-12, so adding in 12 hours * for PM gives us 01-24, whereas we want 00-23, so map hour * 24 to hour 0. */ if (dt->dt_hour == 24) dt->dt_hour = 0; } else { dt->dt_hour = bcdtobin(regs[DS1286_HOUR] & DS1286_HOUR_24HR_MASK); } dt->dt_wday = bcdtobin(regs[DS1286_DOW]); dt->dt_day = bcdtobin(regs[DS1286_DOM]); dt->dt_mon = bcdtobin(regs[DS1286_MONTH] & DS1286_MONTH_MASK); dt->dt_year = FROM_IRIX_YEAR(bcdtobin(regs[DS1286_YEAR])); return 0; } /* * Reset the TODR based on the time value. */ static int dsclock_settime_ymdhms(struct todr_chip_handle *todrch, struct clock_ymdhms *dt) { struct dsclock_softc *sc = todrch->cookie; ds1286_todregs regs; int s; s = splhigh(); DS1286_GETTOD(sc, ®s); splx(s); regs[DS1286_SUBSEC] = 0; regs[DS1286_SEC] = bintobcd(dt->dt_sec); regs[DS1286_MIN] = bintobcd(dt->dt_min); regs[DS1286_HOUR] = bintobcd(dt->dt_hour) & DS1286_HOUR_24HR_MASK; regs[DS1286_DOW] = bintobcd(dt->dt_wday); regs[DS1286_DOM] = bintobcd(dt->dt_day); /* Leave wave-generator bits as set originally */ regs[DS1286_MONTH] &= ~DS1286_MONTH_MASK; regs[DS1286_MONTH] |= bintobcd(dt->dt_mon) & DS1286_MONTH_MASK; regs[DS1286_YEAR] = bintobcd(TO_IRIX_YEAR(dt->dt_year)); s = splhigh(); DS1286_PUTTOD(sc, ®s); splx(s); return 0; }