The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $NetBSD: intersil7170reg.h,v 1.2 2008/04/28 20:23:50 martin Exp $       */
    2 
    3 /*-
    4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Adam Glass.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 #ifndef _INTERSIL7170REG_H_
   33 #define _INTERSIL7170REG_H_
   34 
   35 /*
   36  * Driver support for the intersil7170 used in sun[34]s to provide
   37  * real time clock and time-of-day support.
   38  *
   39  * Derived from: datasheet "ICM7170 a uP-Compatible Real-Time Clock"
   40  *                          document #301680-005, Dec 85
   41  *
   42  * Note that this device provides both time-of-day and interval timer
   43  * functionality. Both functions use the same control registers. On top
   44  * of that, the command control register is write-only. Currently, this
   45  * driver assumes that the interval timer is to be enabled, and hence
   46  * always sets/restores the INTERSIL_CMD_IENABLE control bit when
   47  * manipulating the TOD.
   48  */
   49 
   50 struct intersil_dt {            /* from p. 7 of 10 */
   51         uint8_t dt_csec;   
   52         uint8_t dt_hour;   
   53         uint8_t dt_min;
   54         uint8_t dt_sec;
   55         uint8_t dt_month;
   56         uint8_t dt_day;
   57         uint8_t dt_year;   
   58         uint8_t dt_dow;
   59 };  
   60 
   61 struct intersil7170 {
   62         struct intersil_dt counters; 
   63         struct intersil_dt clk_ram; /* should be ok as both are word aligned */
   64         uint8_t clk_intr_reg;
   65         uint8_t clk_cmd_reg;
   66 };
   67 
   68 /* Indices to time-of-day clock registers */
   69 #define INTERSIL_ICSEC  0
   70 #define INTERSIL_IHOUR  1
   71 #define INTERSIL_IMIN   2
   72 #define INTERSIL_ISEC   3
   73 #define INTERSIL_IMON   4
   74 #define INTERSIL_IDAY   5
   75 #define INTERSIL_IYEAR  6
   76 #define INTERSIL_IDOW   7
   77 
   78 #define INTERSIL_IINTR  16
   79 #define INTERSIL_ICMD   17
   80 
   81 /*  bit assignments for command register, p. 6 of 10, write-only */
   82 #define INTERSIL_CMD_FREQ_32K    0x0
   83 #define INTERSIL_CMD_FREQ_1M     0x1
   84 #define INTERSIL_CMD_FREQ_2M     0x2
   85 #define INTERSIL_CMD_FREQ_4M     0x3
   86 
   87 #define INTERSIL_CMD_12HR_MODE   0x0
   88 #define INTERSIL_CMD_24HR_MODE   0x4
   89 
   90 #define INTERSIL_CMD_STOP        0x0
   91 #define INTERSIL_CMD_RUN         0x8
   92 
   93 #define INTERSIL_CMD_IDISABLE   0x0
   94 #define INTERSIL_CMD_IENABLE   0x10
   95 
   96 #define INTERSIL_CMD_TEST_MODE      0x20
   97 #define INTERSIL_CMD_NORMAL_MODE    0x0
   98 
   99 #define INTERSIL_COMMAND(run, interrupt)                                \
  100         ((run) | (interrupt) | INTERSIL_CMD_FREQ_32K |                  \
  101         INTERSIL_CMD_24HR_MODE | INTERSIL_CMD_NORMAL_MODE)
  102    
  103 /* bit assignments for interrupt register r/w, p 7 of 10 */
  104 
  105 #define INTERSIL_INTER_ALARM       0x1 /* r/w */
  106 #define INTERSIL_INTER_CSECONDS    0x2 /* r/w */
  107 #define INTERSIL_INTER_DSECONDS    0x4 /* r/w */
  108 #define INTERSIL_INTER_SECONDS     0x8 /* r/w */
  109 #define INTERSIL_INTER_MINUTES    0x10 /* r/w */
  110 #define INTERSIL_INTER_HOURS      0x20 /* r/w */
  111 #define INTERSIL_INTER_DAYS       0x40 /* r/w */
  112 #define INTERSIL_INTER_PENDING    0x80 /* read-only */
  113 
  114 #define INTERSIL_INTER_BITS     \
  115         "\2\10PENDING\7DAYS\6HRS\5MIN\4SCDS\3DSEC\2CSEC\1ALARM"
  116 
  117 #endif  /* _INTERSIL7170REG_H_ */

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