FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/intersil7170reg.h

     /*      $NetBSD: intersil7170reg.h,v 1.2 2008/04/28 20:23:50 martin Exp $       */
     
     /*-
      * Copyright (c) 1996 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Adam Glass.
      *
     * 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.
     */
    
    #ifndef _INTERSIL7170REG_H_
    #define _INTERSIL7170REG_H_
    
    /*
     * Driver support for the intersil7170 used in sun[34]s to provide
     * real time clock and time-of-day support.
     *
     * Derived from: datasheet "ICM7170 a uP-Compatible Real-Time Clock"
     *                          document #301680-005, Dec 85
     *
     * Note that this device provides both time-of-day and interval timer
     * functionality. Both functions use the same control registers. On top
     * of that, the command control register is write-only. Currently, this
     * driver assumes that the interval timer is to be enabled, and hence
     * always sets/restores the INTERSIL_CMD_IENABLE control bit when
     * manipulating the TOD.
     */
    
    struct intersil_dt {            /* from p. 7 of 10 */
            uint8_t dt_csec;   
            uint8_t dt_hour;   
            uint8_t dt_min;
            uint8_t dt_sec;
            uint8_t dt_month;
            uint8_t dt_day;
            uint8_t dt_year;   
            uint8_t dt_dow;
    };  
    
    struct intersil7170 {
            struct intersil_dt counters; 
            struct intersil_dt clk_ram; /* should be ok as both are word aligned */
            uint8_t clk_intr_reg;
            uint8_t clk_cmd_reg;
    };
    
    /* Indices to time-of-day clock registers */
    #define INTERSIL_ICSEC  0
    #define INTERSIL_IHOUR  1
    #define INTERSIL_IMIN   2
    #define INTERSIL_ISEC   3
    #define INTERSIL_IMON   4
    #define INTERSIL_IDAY   5
    #define INTERSIL_IYEAR  6
    #define INTERSIL_IDOW   7
    
    #define INTERSIL_IINTR  16
    #define INTERSIL_ICMD   17
    
    /*  bit assignments for command register, p. 6 of 10, write-only */
    #define INTERSIL_CMD_FREQ_32K    0x0
    #define INTERSIL_CMD_FREQ_1M     0x1
    #define INTERSIL_CMD_FREQ_2M     0x2
    #define INTERSIL_CMD_FREQ_4M     0x3
    
    #define INTERSIL_CMD_12HR_MODE   0x0
    #define INTERSIL_CMD_24HR_MODE   0x4
    
    #define INTERSIL_CMD_STOP        0x0
    #define INTERSIL_CMD_RUN         0x8
    
    #define INTERSIL_CMD_IDISABLE   0x0
    #define INTERSIL_CMD_IENABLE   0x10
    
    #define INTERSIL_CMD_TEST_MODE      0x20
    #define INTERSIL_CMD_NORMAL_MODE    0x0
    
    #define INTERSIL_COMMAND(run, interrupt)                                \
           ((run) | (interrupt) | INTERSIL_CMD_FREQ_32K |                  \
           INTERSIL_CMD_24HR_MODE | INTERSIL_CMD_NORMAL_MODE)
      
   /* bit assignments for interrupt register r/w, p 7 of 10 */
   
   #define INTERSIL_INTER_ALARM       0x1 /* r/w */
   #define INTERSIL_INTER_CSECONDS    0x2 /* r/w */
   #define INTERSIL_INTER_DSECONDS    0x4 /* r/w */
   #define INTERSIL_INTER_SECONDS     0x8 /* r/w */
   #define INTERSIL_INTER_MINUTES    0x10 /* r/w */
   #define INTERSIL_INTER_HOURS      0x20 /* r/w */
   #define INTERSIL_INTER_DAYS       0x40 /* r/w */
   #define INTERSIL_INTER_PENDING    0x80 /* read-only */
   
   #define INTERSIL_INTER_BITS     \
           "\2\10PENDING\7DAYS\6HRS\5MIN\4SCDS\3DSEC\2CSEC\1ALARM"
   
   #endif  /* _INTERSIL7170REG_H_ */

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