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

     /*      $NetBSD: mk48txx.c,v 1.16 2004/12/29 21:33:42 bjh21 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.
     * 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.
     */
    
    /*
     * Mostek MK48T02, MK48T08, MK48T59 time-of-day chip subroutines.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: mk48txx.c,v 1.16 2004/12/29 21:33:42 bjh21 Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/device.h>
    #include <sys/errno.h>
    
    #include <machine/bus.h>
    #include <dev/clock_subr.h>
    #include <dev/ic/mk48txxreg.h>
    #include <dev/ic/mk48txxvar.h>
    
    int mk48txx_gettime(todr_chip_handle_t, struct timeval *);
    int mk48txx_settime(todr_chip_handle_t, struct timeval *);
    int mk48txx_getcal(todr_chip_handle_t, int *);
    int mk48txx_setcal(todr_chip_handle_t, int);
    u_int8_t mk48txx_def_nvrd(struct mk48txx_softc *, int);
    void mk48txx_def_nvwr(struct mk48txx_softc *, 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 },
    };
    
    void
    mk48txx_attach(sc)
            struct mk48txx_softc *sc;
    {
            todr_chip_handle_t handle;
            int i;
    
            printf(": %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)
                    panic("mk48txx_attach: unsupported model");
    
            sc->sc_nvramsz = mk48txx_models[i].nvramsz;
            sc->sc_clkoffset = mk48txx_models[i].clkoff;
    
            handle = &sc->sc_handle;
            handle->cookie = sc;
            handle->todr_gettime = mk48txx_gettime;
            handle->todr_settime = mk48txx_settime;
            handle->todr_getcal = mk48txx_getcal;
           handle->todr_setcal = mk48txx_setcal;
           handle->todr_setwen = NULL;
   
           if (sc->sc_nvrd == NULL)
                   sc->sc_nvrd = mk48txx_def_nvrd;
           if (sc->sc_nvwr == NULL)
                   sc->sc_nvwr = mk48txx_def_nvwr;
   }
   
   /*
    * Get time-of-day and convert to a `struct timeval'
    * Return 0 on success; an error number otherwise.
    */
   int
   mk48txx_gettime(handle, tv)
           todr_chip_handle_t handle;
           struct timeval *tv;
   {
           struct mk48txx_softc *sc;
           bus_size_t clkoff;
           struct clock_ymdhms dt;
           int year;
           u_int8_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);
   
           /* simple sanity checks */
           if (dt.dt_mon > 12 || dt.dt_day > 31 ||
               dt.dt_hour >= 24 || dt.dt_min >= 60 || dt.dt_sec >= 60)
                   return EIO;
   
           tv->tv_sec = clock_ymdhms_to_secs(&dt);
           if (tv->tv_sec == -1) return ERANGE;
           tv->tv_usec = 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(handle, tv)
           todr_chip_handle_t handle;
           struct timeval *tv;
   {
           struct mk48txx_softc *sc;
           bus_size_t clkoff;
           struct clock_ymdhms dt;
           u_int8_t csr;
           int year;
           long sec;
   
           sc = handle->cookie;
           clkoff = sc->sc_clkoffset;
   
           /* Note: we ignore `tv_usec' */
           sec = tv->tv_sec + ((tv->tv_usec < 500000) ? 0 : 1);
           clock_secs_to_ymdhms(sec, &dt);
   
           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_getcal(handle, vp)
           todr_chip_handle_t handle;
           int *vp;
   {
   
           return EOPNOTSUPP;
   }
   
   int
   mk48txx_setcal(handle, v)
           todr_chip_handle_t handle;
           int v;
   {
   
           return EOPNOTSUPP;
   }
   
   int
   mk48txx_get_nvram_size(handle, vp)
           todr_chip_handle_t handle;
           bus_size_t *vp;
   {
           struct mk48txx_softc *sc;
   
           sc = handle->cookie;
           *vp = sc->sc_nvramsz;
           return 0;
   }
   
   u_int8_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, u_int8_t v)
   {
   
           bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, v);
   }

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