/*      $NetBSD: tod.h,v 1.4 2005/12/11 12:19:16 christos Exp $ */

/*
 * Structures and macros des accessing the National Semiconductor
 * MM58167 time-of-day chip as wired in the Sun2.  See
 * http://www.national.com/ds/MM/MM58167B.pdf for data sheets,
 * and sys/dev/ic/mm58167var.h.
 */

#if __for_reference_only__
struct mm58167regs {
  
        /* the various timers.  all of these values are in BCD: */

        /* the most significant digit of this value is the milliseconds
           unit; least significant digit of this value is undefined: */
        uint8_t mm58167_msec_xxx;
        uint8_t mm58167_unused0;
        /* both digits of this value make up centiseconds: */
        uint8_t mm58167_csec;
        uint8_t mm58167_unused1;
        uint8_t mm58167_sec;
        uint8_t mm58167_unused2;
        uint8_t mm58167_min;
        uint8_t mm58167_unused3;
        uint8_t mm58167_hour;
        uint8_t mm58167_unused4;
        uint8_t mm58167_wday;
        uint8_t mm58167_unused5;
        uint8_t mm58167_day;
        uint8_t mm58167_unused6;
        uint8_t mm58167_mon;
        uint8_t mm58167_unused7;

        /* the compare latches.  these line up with the timers above, but
           since we don't use them, we don't go through the trouble of
           defining real members for them: */
        struct {
                uint8_t _mm58167_latch_val;
                uint8_t _mm58167_latch_unused;
        } _mm58167_latches[8];

        uint8_t mm58167_isr;            /* interrupt status - not used */
        uint8_t _mm58167_unused8;
        uint8_t mm58167_icr;            /* interrupt control - not used */
        uint8_t _mm58167_unused9;
        uint8_t mm58167_creset;         /* counter reset mask */
        uint8_t _mm58167_unused10;
        uint8_t mm58167_lreset;         /* latch reset mask */
        uint8_t _mm58167_unused11;
        uint8_t mm58167_status;         /* bad counter read status */
        uint8_t _mm58167_unused12;
        uint8_t mm58167_go;             /* GO - start at integral seconds */
        uint8_t _mm58167_unused13;
        uint8_t mm58167_stby;           /* standby mode - not used */
        uint8_t _mm58167_unused14;
        uint8_t mm58167_test;           /* test mode - ??? */
        uint8_t _mm58167_unused15;
};
#endif

/*
 * Register offsets.
 */
#define MM58167REG_MSEC_XXX     0
#define MM58167REG_CSEC         2
#define MM58167REG_SEC          4
#define MM58167REG_MIN          6
#define MM58167REG_HOUR         8
#define MM58167REG_WDAY         10
#define MM58167REG_DAY          12
#define MM58167REG_MON          14
#define MM58167REG_STATUS       40
#define MM58167REG_GO           42
#define MM58167REG_BANK_SZ      48