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Atmosphere/libraries/libexosphere/source/rtc/rtc_api.cpp

65 lines
2.8 KiB
C++

/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <exosphere.hpp>
#include "max77620-rtc.h"
namespace ams::rtc {
namespace {
constexpr inline int I2cAddressMax77620Rtc = 0x68;
/* TODO: Find datasheet, link to it instead. */
/* NOTE: Tentatively, Max77620 "mostly" matches https://datasheets.maximintegrated.com/en/ds/MAX77863.pdf. */
constexpr inline int Max77620RtcRegisterUpdate0 = 0x04;
constexpr inline int Max77620RtcRegisterAlarmStart = 0x0E;
constexpr inline int Max77620RtcRegisterAlarm1Sec = 0x0E;
constexpr inline int Max77620RtcRegisterAlarm1Min = 0x0F;
constexpr inline int Max77620RtcRegisterAlarm1Hour = 0x10;
constexpr inline int Max77620RtcRegisterAlarm1Weekday = 0x11;
constexpr inline int Max77620RtcRegisterAlarm1Month = 0x12;
constexpr inline int Max77620RtcRegisterAlarm1Year = 0x13;
constexpr inline int Max77620RtcRegisterAlarm1Date = 0x14;
constexpr inline int Max77620RtcRegisterAlarm2Sec = 0x15;
constexpr inline int Max77620RtcRegisterAlarm2Min = 0x16;
constexpr inline int Max77620RtcRegisterAlarm2Hour = 0x17;
constexpr inline int Max77620RtcRegisterAlarm2Weekday = 0x18;
constexpr inline int Max77620RtcRegisterAlarm2Month = 0x19;
constexpr inline int Max77620RtcRegisterAlarm2Year = 0x1A;
constexpr inline int Max77620RtcRegisterAlarm2Date = 0x1B;
constexpr inline int Max77620RtcRegisterAlarmLast = 0x1B;
}
void StopAlarm() {
/* Begin update. */
i2c::SendByte(i2c::Port_5, I2cAddressMax77620Rtc, Max77620RtcRegisterUpdate0, MAX77620_RTC_READ_UPDATE);
/* Clear ALARM_EN for all alarm registers. */
for (auto reg = Max77620RtcRegisterAlarmStart; reg <= Max77620RtcRegisterAlarmLast; ++reg) {
u8 val = i2c::QueryByte(i2c::Port_5, I2cAddressMax77620Rtc, reg);
val &= ~MAX77620_RTC_ALARM_EN_MASK;
i2c::SendByte(i2c::Port_5, I2cAddressMax77620Rtc, reg, val);
}
/* End update. */
i2c::SendByte(i2c::Port_5, I2cAddressMax77620Rtc, Max77620RtcRegisterUpdate0, MAX77620_RTC_WRITE_UPDATE);
}
}