211 lines
6.2 KiB
C
211 lines
6.2 KiB
C
/* $NetBSD: mk48txx.c,v 1.25 2008/04/28 20:23:50 martin Exp $ */
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Mostek MK48T02, MK48T08, MK48T59 time-of-day chip subroutines.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: mk48txx.c,v 1.25 2008/04/28 20:23:50 martin Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/errno.h>
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#include <sys/bus.h>
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#include <dev/clock_subr.h>
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#include <dev/ic/mk48txxreg.h>
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#include <dev/ic/mk48txxvar.h>
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int mk48txx_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
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int mk48txx_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
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uint8_t mk48txx_def_nvrd(struct mk48txx_softc *, int);
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void mk48txx_def_nvwr(struct mk48txx_softc *, int, uint8_t);
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struct {
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const char *name;
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bus_size_t nvramsz;
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bus_size_t clkoff;
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int flags;
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#define MK48TXX_EXT_REGISTERS 1 /* Has extended register set */
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} mk48txx_models[] = {
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{ "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 },
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{ "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 },
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{ "mk48t18", MK48T18_CLKSZ, MK48T18_CLKOFF, 0 },
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{ "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS },
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};
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void
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mk48txx_attach(struct mk48txx_softc *sc)
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{
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todr_chip_handle_t handle;
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int i;
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aprint_normal(": %s", sc->sc_model);
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i = __arraycount(mk48txx_models);
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while (--i >= 0) {
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if (strcmp(sc->sc_model, mk48txx_models[i].name) == 0)
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break;
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}
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if (i < 0)
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panic("%s: unsupported model", __func__);
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sc->sc_nvramsz = mk48txx_models[i].nvramsz;
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sc->sc_clkoffset = mk48txx_models[i].clkoff;
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handle = &sc->sc_handle;
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handle->cookie = sc;
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handle->todr_gettime = NULL;
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handle->todr_settime = NULL;
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handle->todr_gettime_ymdhms = mk48txx_gettime_ymdhms;
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handle->todr_settime_ymdhms = mk48txx_settime_ymdhms;
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if (sc->sc_nvrd == NULL)
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sc->sc_nvrd = mk48txx_def_nvrd;
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if (sc->sc_nvwr == NULL)
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sc->sc_nvwr = mk48txx_def_nvwr;
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todr_attach(handle);
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}
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/*
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* Get time-of-day and convert to a `struct timeval'
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* Return 0 on success; an error number otherwise.
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*/
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int
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mk48txx_gettime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
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{
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struct mk48txx_softc *sc;
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bus_size_t clkoff;
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int year;
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uint8_t csr;
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sc = handle->cookie;
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clkoff = sc->sc_clkoffset;
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todr_wenable(handle, 1);
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/* enable read (stop time) */
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csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
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csr |= MK48TXX_CSR_READ;
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
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dt->dt_sec = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_ISEC));
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dt->dt_min = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMIN));
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dt->dt_hour = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IHOUR));
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dt->dt_day = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IDAY));
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dt->dt_wday = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IWDAY));
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dt->dt_mon = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMON));
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year = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IYEAR));
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year += sc->sc_year0;
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if (year < POSIX_BASE_YEAR &&
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(sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0)
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year += 100;
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dt->dt_year = year;
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/* time wears on */
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csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
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csr &= ~MK48TXX_CSR_READ;
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
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todr_wenable(handle, 0);
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return 0;
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}
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/*
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* Set the time-of-day clock based on the value of the `struct timeval' arg.
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* Return 0 on success; an error number otherwise.
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*/
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int
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mk48txx_settime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
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{
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struct mk48txx_softc *sc;
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bus_size_t clkoff;
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uint8_t csr;
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int year;
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sc = handle->cookie;
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clkoff = sc->sc_clkoffset;
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year = dt->dt_year - sc->sc_year0;
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if (year > 99 &&
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(sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0)
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year -= 100;
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todr_wenable(handle, 1);
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/* enable write */
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csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
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csr |= MK48TXX_CSR_WRITE;
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ISEC, TOBCD(dt->dt_sec));
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMIN, TOBCD(dt->dt_min));
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IHOUR, TOBCD(dt->dt_hour));
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IWDAY, TOBCD(dt->dt_wday));
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IDAY, TOBCD(dt->dt_day));
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMON, TOBCD(dt->dt_mon));
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_IYEAR, TOBCD(year));
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/* load them up */
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csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
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csr &= ~MK48TXX_CSR_WRITE;
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(*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
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todr_wenable(handle, 0);
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return 0;
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}
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int
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mk48txx_get_nvram_size(todr_chip_handle_t handle, bus_size_t *vp)
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{
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struct mk48txx_softc *sc;
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sc = handle->cookie;
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*vp = sc->sc_nvramsz;
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return 0;
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}
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uint8_t
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mk48txx_def_nvrd(struct mk48txx_softc *sc, int off)
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{
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return bus_space_read_1(sc->sc_bst, sc->sc_bsh, off);
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}
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void
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mk48txx_def_nvwr(struct mk48txx_softc *sc, int off, uint8_t v)
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{
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bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, v);
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}
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