forked from Imagelibrary/rtems
88 lines
3.1 KiB
C
88 lines
3.1 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* This file contains the definitions for the following real-time clocks:
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*
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* + Motorola MC146818A
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*
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __LIBCHIP_MC146818A_h
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#define __LIBCHIP_MC146818A_h
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/*
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* Register addresses within chip
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*/
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#define MC146818A_SEC 0x00 /* seconds */
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#define MC146818A_SECALRM 0x01 /* seconds alarm */
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#define MC146818A_MIN 0x02 /* minutes */
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#define MC146818A_MINALRM 0x03 /* minutes alarm */
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#define MC146818A_HRS 0x04 /* hours */
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#define MC146818A_HRSALRM 0x05 /* hours alarm */
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#define MC146818A_WDAY 0x06 /* week day */
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#define MC146818A_DAY 0x07 /* day of month */
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#define MC146818A_MONTH 0x08 /* month of year */
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#define MC146818A_YEAR 0x09 /* month of year */
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#define MC146818A_STATUSA 0x0a /* status register A */
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#define MC146818ASA_TUP 0x80 /* time update in progress */
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#define MC146818ASA_DIVIDER 0x20 /* divider for 32768 crystal */
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#define MC146818ASA_1024 0x06 /* divide to 1024 Hz */
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#define MC146818A_STATUSB 0x0b /* status register B */
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#define MC146818ASB_DST 0x01 /* Daylight Savings Time */
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#define MC146818ASB_24HR 0x02 /* 0 = 12 hours, 1 = 24 hours */
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#define MC146818ASB_HALT 0x80 /* stop clock updates */
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#define MC146818A_STATUSD 0x0d /* status register D */
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#define MC146818ASD_PWR 0x80 /* clock lost power */
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/*
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* Driver function table
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*/
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extern rtc_fns mc146818a_fns;
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bool mc146818a_probe(
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int minor
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);
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/*
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* Default register access routines
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*/
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uint32_t mc146818a_get_register(
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uintptr_t ulCtrlPort,
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uint8_t ucRegNum
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);
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void mc146818a_set_register(
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uintptr_t ulCtrlPort,
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uint8_t ucRegNum,
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uint32_t ucData
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);
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#endif
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/* end of include file */
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