/*- * Copyright (c) 2000 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Paul Kranenburg. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * 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. * * from: NetBSD: mk48txx.c,v 1.15 2004/07/05 09:24:31 pk Exp */ #include __FBSDID("$FreeBSD$"); /* * Mostek MK48T02, MK48T08, MK48T18, MK48T59 time-of-day chip subroutines. */ #include #include #include #include #include #include #include #include "clock_if.h" static uint8_t mk48txx_def_nvrd(device_t, int); static void mk48txx_def_nvwr(device_t, int, u_int8_t); struct { const char *name; bus_size_t nvramsz; bus_size_t clkoff; int flags; #define MK48TXX_EXT_REGISTERS 1 /* Has extended register set */ } mk48txx_models[] = { { "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 }, { "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 }, { "mk48t18", MK48T18_CLKSZ, MK48T18_CLKOFF, 0 }, { "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS }, }; int mk48txx_attach(device_t dev) { struct mk48txx_softc *sc; int i; sc = device_get_softc(dev); device_printf(dev, "model %s", sc->sc_model); i = sizeof(mk48txx_models) / sizeof(mk48txx_models[0]); while (--i >= 0) { if (strcmp(sc->sc_model, mk48txx_models[i].name) == 0) { break; } } if (i < 0) { device_printf(dev, " (unsupported)\n"); return (ENXIO); } printf("\n"); sc->sc_nvramsz = mk48txx_models[i].nvramsz; sc->sc_clkoffset = mk48txx_models[i].clkoff; if (sc->sc_nvrd == NULL) sc->sc_nvrd = mk48txx_def_nvrd; if (sc->sc_nvwr == NULL) sc->sc_nvwr = mk48txx_def_nvwr; if ((mk48txx_models[i].flags & MK48TXX_EXT_REGISTERS) && ((*sc->sc_nvrd)(dev, sc->sc_clkoffset + MK48TXX_FLAGS) & MK48TXX_FLAGS_BL)) { device_printf(dev, "mk48txx_attach: battery low\n"); return (ENXIO); } clock_register(dev, 1000000); /* 1 second resolution. */ return (0); } /* * Get time-of-day and convert to a `struct timespec' * Return 0 on success; an error number otherwise. */ int mk48txx_gettime(device_t dev, struct timespec *ts) { struct mk48txx_softc *sc; bus_size_t clkoff; struct clocktime ct; int year; u_int8_t csr; sc = device_get_softc(dev); clkoff = sc->sc_clkoffset; /* enable read (stop time) */ csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR); csr |= MK48TXX_CSR_READ; (*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr); #define FROMREG(reg, mask) ((*sc->sc_nvrd)(dev, clkoff + (reg)) & (mask)) ct.nsec = 0; ct.sec = FROMBCD(FROMREG(MK48TXX_ISEC, MK48TXX_SEC_MASK)); ct.min = FROMBCD(FROMREG(MK48TXX_IMIN, MK48TXX_MIN_MASK)); ct.hour = FROMBCD(FROMREG(MK48TXX_IHOUR, MK48TXX_HOUR_MASK)); ct.day = FROMBCD(FROMREG(MK48TXX_IDAY, MK48TXX_DAY_MASK)); /* Map dow from 1 - 7 to 0 - 6; FROMBCD() isn't necessary here. */ ct.dow = FROMREG(MK48TXX_IWDAY, MK48TXX_WDAY_MASK) - 1; ct.mon = FROMBCD(FROMREG(MK48TXX_IMON, MK48TXX_MON_MASK)); year = FROMBCD(FROMREG(MK48TXX_IYEAR, MK48TXX_YEAR_MASK)); /* * XXX: At least the MK48T59 (probably all MK48Txx models with * extended registers) has a century bit in the MK48TXX_IWDAY * register which should be used here to make up the century * when MK48TXX_NO_CENT_ADJUST (which actually means don't * _manually_ adjust the century in the driver) is set to 1. * Sun/Solaris doesn't use this bit (probably for backwards * compatibility with Sun hardware equipped with older MK48Txx * models) and at present this driver is only used on sparc64 * so not respecting the century bit doesn't really matter at * the moment but generally this should be implemented. */ #undef FROMREG year += sc->sc_year0; if (year < POSIX_BASE_YEAR && (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0) year += 100; ct.year = year; /* time wears on */ csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR); csr &= ~MK48TXX_CSR_READ; (*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr); return (clock_ct_to_ts(&ct, ts)); } /* * Set the time-of-day clock based on the value of the `struct timespec' arg. * Return 0 on success; an error number otherwise. */ int mk48txx_settime(device_t dev, struct timespec *ts) { struct mk48txx_softc *sc; bus_size_t clkoff; struct clocktime ct; u_int8_t csr; int year; sc = device_get_softc(dev); clkoff = sc->sc_clkoffset; /* Accuracy is only one second. */ if (ts->tv_nsec >= 500000000) ts->tv_sec++; ts->tv_nsec = 0; clock_ts_to_ct(ts, &ct); year = ct.year - sc->sc_year0; if (year > 99 && (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0) year -= 100; /* enable write */ csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR); csr |= MK48TXX_CSR_WRITE; (*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr); #define TOREG(reg, mask, val) \ ((*sc->sc_nvwr)(dev, clkoff + (reg), \ ((*sc->sc_nvrd)(dev, clkoff + (reg)) & ~(mask)) | \ ((val) & (mask)))) TOREG(MK48TXX_ISEC, MK48TXX_SEC_MASK, TOBCD(ct.sec)); TOREG(MK48TXX_IMIN, MK48TXX_MIN_MASK, TOBCD(ct.min)); TOREG(MK48TXX_IHOUR, MK48TXX_HOUR_MASK, TOBCD(ct.hour)); /* Map dow from 0 - 6 to 1 - 7; TOBCD() isn't necessary here. */ TOREG(MK48TXX_IWDAY, MK48TXX_WDAY_MASK, ct.dow + 1); TOREG(MK48TXX_IDAY, MK48TXX_DAY_MASK, TOBCD(ct.day)); TOREG(MK48TXX_IMON, MK48TXX_MON_MASK, TOBCD(ct.mon)); TOREG(MK48TXX_IYEAR, MK48TXX_YEAR_MASK, TOBCD(year)); /* * XXX: Use the century bit for storing the century when * MK48TXX_NO_CENT_ADJUST is set to 1. */ #undef TOREG /* load them up */ csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR); csr &= ~MK48TXX_CSR_WRITE; (*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr); return (0); } static u_int8_t mk48txx_def_nvrd(device_t dev, int off) { struct mk48txx_softc *sc; sc = device_get_softc(dev); return (bus_space_read_1(sc->sc_bst, sc->sc_bsh, off)); } static void mk48txx_def_nvwr(device_t dev, int off, u_int8_t v) { struct mk48txx_softc *sc; sc = device_get_softc(dev); bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, v); }