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