FreeBSD/Linux Kernel Cross Reference
sys/powerpc/mpc85xx/ds1553_reg.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (C) 2006-2008 Semihalf, Grzegorz Bernacki
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _DEV_RTC_DS1553_H_
    #define _DEV_RTC_DS1553_H_
    
    /* DS1553 registers */
    #define DS1553_NVRAM_SIZE               0x1ff0
    #define DS1553_OFF_FLAGS                0x1ff0
    #define DS1553_OFF_ALARM_SECONDS        0x1ff2
    #define DS1553_OFF_ALARM_MINUTES        0x1ff3
    #define DS1553_OFF_ALARM_HOURS          0x1ff4
    #define DS1553_OFF_ALARM_DATE           0x1ff5
    #define DS1553_OFF_INTERRUPTS           0x1ff6
    #define DS1553_OFF_WATCHDOG             0x1ff7
    #define DS1553_OFF_CONTROL              0x1ff8
    #define DS1553_OFF_SECONDS              0x1ff9
    #define DS1553_OFF_MINUTES              0x1ffa
    #define DS1553_OFF_HOURS                0x1ffb
    #define DS1553_OFF_DAYOFWEEK            0x1ffc
    #define DS1553_OFF_DATE                 0x1ffd
    #define DS1553_OFF_MONTH                0x1ffe
    #define DS1553_OFF_YEAR                 0x1fff
    
    /* dayofweek register's bits */
    #define DS1553_BIT_FREQ_TEST            0x40 /* frequency test bit */
    
    /* seconds register's bit */
    #define DS1553_BIT_OSC                  0x80 /* oscillator start/stop bit */
    
    /* control register's bits */
    #define DS1553_BIT_WRITE                0x80 /* write */
    #define DS1553_BIT_READ                 0x40 /* read */
    
    /* watchdog register's bits */
    #define DS1553_BIT_WATCHDOG             0x80 /* watchdog steering bit */
    #define DS1553_BIT_BMB4                 0x40 /* watchdog multiplier bit4 */
    #define DS1553_BIT_BMB3                 0x20 /* watchdog multiplier bit3 */
    #define DS1553_BIT_BMB2                 0x10 /* watchdog multiplier bit2 */
    #define DS1553_BIT_BMB1                 0x8  /* watchdog multiplier bit1 */
    #define DS1553_BIT_BMB0                 0x4  /* watchdog multiplier bit0 */
    #define DS1553_BIT_RB1                  0x2  /* watchdog resolution bit1 */
    #define DS1553_BIT_RB0                  0x1  /* watchdog resolution bit0 */
    
    /* alarm seconds/minutes/hours/date register's bit */
    #define DS1553_BIT_AM                   0x80 /* alarm mask bit */
    
    /* flag register's bits */
    #define DS1553_BIT_BLF                  0x10 /* battery flag */
    #define DS1553_BIT_WF                   0x80 /* watchdog flag */
    
    /* register's mask */
    #define DS1553_MASK_MONTH               0x1f
    #define DS1553_MASK_DATE                0x3f
    #define DS1553_MASK_DAYOFWEEK           0x7
    #define DS1553_MASK_HOUR                0x3f
    #define DS1553_MASK_MINUTES             0x7f
    #define DS1553_MASK_SECONDS             0x7f
    
    struct ds1553_softc {
            bus_space_tag_t         sc_bst; /* bus space tag */
            bus_space_handle_t      sc_bsh; /* bus space handle */
    
            int                     rid;    /* resource id */
            struct resource         *res;
            struct mtx              sc_mtx; /* hardware mutex */
    
            uint32_t                year_offset;
            /* read/write functions */
            uint8_t                 (*sc_read)(device_t, bus_size_t);
            void                    (*sc_write)(device_t, bus_size_t, uint8_t);
    };
   
   /* device interface */
   int ds1553_attach(device_t);
   
   /* clock interface */
   int ds1553_gettime(device_t, struct timespec *);
   int ds1553_settime(device_t, struct timespec *);
   
   #endif /* _DEV_RTC_DS1553_H_ */

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