105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2021 Aidan MacDonald
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*
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* Based mainly on rtc_jz4760.c,
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* Copyright (C) 2016 by Roman Stolyarov
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "rtc.h"
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#include "x1000/rtc.h"
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#include <stdint.h>
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/* 4 byte magic number 'RTCV' */
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#define RTCV 0x52544356
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/* expected RTC clock frequency */
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#define NC1HZ_EXPECTED (32768 - 1)
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static void rtc_write_reg(uint32_t addr, uint32_t value)
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{
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while(jz_readf(RTC_CR, WRDY) == 0);
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REG_RTC_WENR = 0xa55a;
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while(jz_readf(RTC_WENR, WEN) == 0);
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while(jz_readf(RTC_CR, WRDY) == 0);
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(*(volatile uint32_t*)addr) = value;
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while(jz_readf(RTC_CR, WRDY) == 0);
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}
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void rtc_init(void)
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{
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/* Check if we totally lost power and need to reset the RTC */
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if(REG_RTC_HSPR != RTCV || jz_readf(RTC_GR, NC1HZ) != NC1HZ_EXPECTED) {
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rtc_write_reg(JA_RTC_GR, NC1HZ_EXPECTED);
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rtc_write_reg(JA_RTC_HWFCR, 3200);
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rtc_write_reg(JA_RTC_HRCR, 2048);
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rtc_write_reg(JA_RTC_SR, 1546300800); /* 01/01/2019 */
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rtc_write_reg(JA_RTC_CR, 1);
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rtc_write_reg(JA_RTC_HSPR, RTCV);
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}
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rtc_write_reg(JA_RTC_HWRSR, 0);
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}
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int rtc_read_datetime(struct tm* tm)
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{
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time_t time = REG_RTC_SR;
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gmtime_r(&time, tm);
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return 1;
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}
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int rtc_write_datetime(const struct tm* tm)
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{
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time_t time = mktime((struct tm*)tm);
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rtc_write_reg(JA_RTC_SR, time);
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return 1;
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}
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#ifdef HAVE_RTC_ALARM
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/* TODO: implement the RTC alarm */
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void rtc_set_alarm(int h, int m)
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{
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(void)h;
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(void)m;
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}
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void rtc_get_alarm(int* h, int* m)
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{
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(void)h;
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(void)m;
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}
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void rtc_enable_alarm(bool enable)
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{
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(void)enable;
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}
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bool rtc_check_alarm_started(bool release_alarm)
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{
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(void)release_alarm;
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return false;
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}
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bool rtc_check_alarm_flag(void)
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{
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return false;
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}
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#endif
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