FreeBSD/Linux Kernel Cross Reference
sys/dev/mc146818/mc146818var.h

     /*-
      * Copyright (c) 2003 Izumi Tsutsui.  All rights reserved.
      *
      * 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.
     *
     *      from: NetBSD: mc146818var.h,v 1.3 2003/11/24 06:20:40 tsutsui Exp
     *
     * $FreeBSD$
     */
    
    struct mc146818_softc {
            bus_space_tag_t sc_bst;                 /* bus space tag */
            bus_space_handle_t sc_bsh;              /* bus space handle */
    
            struct mtx sc_mtx;                      /* hardware mutex */
    
            u_char sc_rega;                         /* register A */
            u_char sc_regb;                         /* register B */
    
            u_int sc_year0;                         /* year counter offset */
            u_int sc_flag;                          /* MD flags */
    #define MC146818_NO_CENT_ADJUST 0x0001          /* don't adjust century */
    #define MC146818_BCD            0x0002          /* use BCD mode */
    #define MC146818_12HR           0x0004          /* use AM/PM mode */
    
            /* MD chip register read/write functions */
            u_int (*sc_mcread)(device_t, u_int);
            void (*sc_mcwrite)(device_t, u_int, u_int);
            /* MD century get/set functions */
            u_int (*sc_getcent)(device_t);
            void (*sc_setcent)(device_t, u_int);
    };
    
    /* Default read/write functions */
    u_int mc146818_def_read(device_t, u_int);
    void mc146818_def_write(device_t, u_int, u_int);
    
    /* Chip attach function */
    int mc146818_attach(device_t);
    
    /* Methods for the clock interface */
    #ifdef notyet
    int mc146818_getsecs(device_t, int *);
    #endif
    int mc146818_gettime(device_t, struct timespec *);
    int mc146818_settime(device_t, struct timespec *);

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