FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/mk48txx.c

     /*      $NetBSD: mk48txx.c,v 1.25 2008/04/28 20:23:50 martin Exp $ */
     /*-
      * 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.
     *
     * 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.
     */
    
    /*
     * Mostek MK48T02, MK48T08, MK48T59 time-of-day chip subroutines.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: mk48txx.c,v 1.25 2008/04/28 20:23:50 martin Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/device.h>
    #include <sys/errno.h>
    
    #include <sys/bus.h>
    #include <dev/clock_subr.h>
    #include <dev/ic/mk48txxreg.h>
    #include <dev/ic/mk48txxvar.h>
    
    int mk48txx_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
    int mk48txx_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
    uint8_t mk48txx_def_nvrd(struct mk48txx_softc *, int);
    void mk48txx_def_nvwr(struct mk48txx_softc *, int, uint8_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 },
    };
    
    void
    mk48txx_attach(struct mk48txx_softc *sc)
    {
            todr_chip_handle_t handle;
            int i;
    
            aprint_normal(": %s", sc->sc_model);
    
            i = __arraycount(mk48txx_models);
            while (--i >= 0) {
                    if (strcmp(sc->sc_model, mk48txx_models[i].name) == 0)
                            break;
            }
            if (i < 0)
                    panic("%s: unsupported model", __func__);
    
            sc->sc_nvramsz = mk48txx_models[i].nvramsz;
            sc->sc_clkoffset = mk48txx_models[i].clkoff;
    
            handle = &sc->sc_handle;
            handle->cookie = sc;
            handle->todr_gettime = NULL;
            handle->todr_settime = NULL;
            handle->todr_gettime_ymdhms = mk48txx_gettime_ymdhms;
            handle->todr_settime_ymdhms = mk48txx_settime_ymdhms;
    
            if (sc->sc_nvrd == NULL)
                    sc->sc_nvrd = mk48txx_def_nvrd;
            if (sc->sc_nvwr == NULL)
                    sc->sc_nvwr = mk48txx_def_nvwr;
    
            todr_attach(handle);
    }
    
   /*
    * Get time-of-day and convert to a `struct timeval'
    * Return 0 on success; an error number otherwise.
    */
   int
   mk48txx_gettime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
   {
           struct mk48txx_softc *sc;
           bus_size_t clkoff;
           int year;
           uint8_t csr;
   
           sc = handle->cookie;
           clkoff = sc->sc_clkoffset;
   
           todr_wenable(handle, 1);
   
           /* enable read (stop time) */
           csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
           csr |= MK48TXX_CSR_READ;
           (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
   
           dt->dt_sec = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_ISEC));
           dt->dt_min = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMIN));
           dt->dt_hour = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IHOUR));
           dt->dt_day = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IDAY));
           dt->dt_wday = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IWDAY));
           dt->dt_mon = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMON));
           year = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IYEAR));
   
           year += sc->sc_year0;
           if (year < POSIX_BASE_YEAR &&
               (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0)
                   year += 100;
   
           dt->dt_year = year;
   
           /* time wears on */
           csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
           csr &= ~MK48TXX_CSR_READ;
           (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
           todr_wenable(handle, 0);
   
           return 0;
   }
   
   /*
    * Set the time-of-day clock based on the value of the `struct timeval' arg.
    * Return 0 on success; an error number otherwise.
    */
   int
   mk48txx_settime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
   {
           struct mk48txx_softc *sc;
           bus_size_t clkoff;
           uint8_t csr;
           int year;
   
           sc = handle->cookie;
           clkoff = sc->sc_clkoffset;
   
           year = dt->dt_year - sc->sc_year0;
           if (year > 99 &&
               (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0)
                   year -= 100;
   
           todr_wenable(handle, 1);
           /* enable write */
           csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
           csr |= MK48TXX_CSR_WRITE;
           (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
   
           (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ISEC, TOBCD(dt->dt_sec));
           (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMIN, TOBCD(dt->dt_min));
           (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IHOUR, TOBCD(dt->dt_hour));
           (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IWDAY, TOBCD(dt->dt_wday));
           (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IDAY, TOBCD(dt->dt_day));
           (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMON, TOBCD(dt->dt_mon));
           (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IYEAR, TOBCD(year));
   
           /* load them up */
           csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR);
           csr &= ~MK48TXX_CSR_WRITE;
           (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr);
           todr_wenable(handle, 0);
           return 0;
   }
   
   int
   mk48txx_get_nvram_size(todr_chip_handle_t handle, bus_size_t *vp)
   {
           struct mk48txx_softc *sc;
   
           sc = handle->cookie;
           *vp = sc->sc_nvramsz;
           return 0;
   }
   
   uint8_t
   mk48txx_def_nvrd(struct mk48txx_softc *sc, int off)
   {
   
           return bus_space_read_1(sc->sc_bst, sc->sc_bsh, off);
   }
   
   void
   mk48txx_def_nvwr(struct mk48txx_softc *sc, int off, uint8_t v)
   {
   
           bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, v);
   }

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