2020-06-08 17:02:50 +01:00
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/*
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2021-10-04 20:59:10 +01:00
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* Copyright (c) Atmosphère-NX
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2020-06-08 17:02:50 +01:00
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <exosphere.hpp>
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#include "max77620-rtc.h"
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namespace ams::rtc {
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namespace {
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constexpr inline int I2cAddressMax77620Rtc = 0x68;
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/* TODO: Find datasheet, link to it instead. */
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/* NOTE: Tentatively, Max77620 "mostly" matches https://datasheets.maximintegrated.com/en/ds/MAX77863.pdf. */
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constexpr inline int Max77620RtcRegisterUpdate0 = 0x04;
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constexpr inline int Max77620RtcRegisterAlarmStart = 0x0E;
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constexpr inline int Max77620RtcRegisterAlarm1Sec = 0x0E;
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constexpr inline int Max77620RtcRegisterAlarm1Min = 0x0F;
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constexpr inline int Max77620RtcRegisterAlarm1Hour = 0x10;
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constexpr inline int Max77620RtcRegisterAlarm1Weekday = 0x11;
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constexpr inline int Max77620RtcRegisterAlarm1Month = 0x12;
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constexpr inline int Max77620RtcRegisterAlarm1Year = 0x13;
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constexpr inline int Max77620RtcRegisterAlarm1Date = 0x14;
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constexpr inline int Max77620RtcRegisterAlarm2Sec = 0x15;
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constexpr inline int Max77620RtcRegisterAlarm2Min = 0x16;
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constexpr inline int Max77620RtcRegisterAlarm2Hour = 0x17;
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constexpr inline int Max77620RtcRegisterAlarm2Weekday = 0x18;
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constexpr inline int Max77620RtcRegisterAlarm2Month = 0x19;
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constexpr inline int Max77620RtcRegisterAlarm2Year = 0x1A;
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constexpr inline int Max77620RtcRegisterAlarm2Date = 0x1B;
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constexpr inline int Max77620RtcRegisterAlarmLast = 0x1B;
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}
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void StopAlarm() {
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/* Begin update. */
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i2c::SendByte(i2c::Port_5, I2cAddressMax77620Rtc, Max77620RtcRegisterUpdate0, MAX77620_RTC_READ_UPDATE);
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/* Clear ALARM_EN for all alarm registers. */
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for (auto reg = Max77620RtcRegisterAlarmStart; reg <= Max77620RtcRegisterAlarmLast; ++reg) {
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u8 val = i2c::QueryByte(i2c::Port_5, I2cAddressMax77620Rtc, reg);
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val &= ~MAX77620_RTC_ALARM_EN_MASK;
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i2c::SendByte(i2c::Port_5, I2cAddressMax77620Rtc, reg, val);
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}
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/* End update. */
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i2c::SendByte(i2c::Port_5, I2cAddressMax77620Rtc, Max77620RtcRegisterUpdate0, MAX77620_RTC_WRITE_UPDATE);
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}
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}
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