/*
 * Copyright (c) 2018-2019 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/>.
 */

namespace ams::boot::bq24193 {

    constexpr u8 InputSourceControl                     = 0x00;
    constexpr u8 PowerOnConfiguration                   = 0x01;
    constexpr u8 ChargeCurrentControl                   = 0x02;
    constexpr u8 PreChargeTerminationCurrentControl     = 0x03;
    constexpr u8 ChargeVoltageControl                   = 0x04;
    constexpr u8 ChargeTerminationTimerControl          = 0x05;
    constexpr u8 IrCompensationThermalRegulationControl = 0x06;
    constexpr u8 MiscOperationControl                   = 0x07;
    constexpr u8 SystemStatus                           = 0x08;
    constexpr u8 Fault                                  = 0x09;
    constexpr u8 VendorPartRevisionStatus               = 0x0A;

    enum ChargerConfiguration : u8 {
        ChargerConfiguration_ChargeDisable = (0 << 4),
        ChargerConfiguration_ChargeBattery = (1 << 4),
        ChargerConfiguration_Otg           = (2 << 4),
    };

    constexpr u32 ChargeVoltageLimitMin = 3504;
    constexpr u32 ChargeVoltageLimitMax = 4208;

    inline u8 EncodeChargeVoltageLimit(u32 voltage) {
        AMS_ASSERT(voltage >= ChargeVoltageLimitMin);
        AMS_ASSERT(voltage <= ChargeVoltageLimitMax);

        voltage -= ChargeVoltageLimitMin;
        voltage >>= 4;
        return static_cast<u8>(voltage << 2);
    }

    inline u32 DecodeChargeVoltageLimit(u8 reg) {
        return ChargeVoltageLimitMin + (static_cast<u32>(reg & 0xFC) << 2);
    }

    constexpr u32 FastChargeCurrentLimitMin = 512;
    constexpr u32 FastChargeCurrentLimitMax = 4544;

    inline u8 EncodeFastChargeCurrentLimit(u32 current) {
        AMS_ASSERT(current >= FastChargeCurrentLimitMin);
        AMS_ASSERT(current <= FastChargeCurrentLimitMax);

        current -= FastChargeCurrentLimitMin;
        current >>= 6;
        return static_cast<u8>(current << 2);
    }

    inline u32 DecodeFastChargeCurrentLimit(u8 reg) {
        return FastChargeCurrentLimitMin + (static_cast<u32>(reg & 0xFC) << 4);
    }

    enum InputCurrentLimit : u8 {
        InputCurrentLimit_100mA  = 0,
        InputCurrentLimit_150mA  = 1,
        InputCurrentLimit_500mA  = 2,
        InputCurrentLimit_900mA  = 3,
        InputCurrentLimit_1200mA = 4,
        InputCurrentLimit_1500mA = 5,
        InputCurrentLimit_2000mA = 6,
        InputCurrentLimit_3000mA = 7,
    };

    constexpr u32 PreChargeCurrentLimitMin = 128;
    constexpr u32 PreChargeCurrentLimitMax = 2048;

    inline u8 EncodePreChargeCurrentLimit(u32 current) {
        AMS_ASSERT(current >= PreChargeCurrentLimitMin);
        AMS_ASSERT(current <= PreChargeCurrentLimitMax);

        current -= PreChargeCurrentLimitMin;
        current >>= 7;
        return static_cast<u8>(current << 4);
    }

    inline u32 DecodePreChargeCurrentLimit(u8 reg) {
        return PreChargeCurrentLimitMin + (static_cast<u32>(reg & 0xF0) << 3);
    }

    constexpr u32 TerminationCurrentLimitMin = 128;
    constexpr u32 TerminationCurrentLimitMax = 2048;

    inline u8 EncodeTerminationCurrentLimit(u32 current) {
        AMS_ASSERT(current >= TerminationCurrentLimitMin);
        AMS_ASSERT(current <= TerminationCurrentLimitMax);

        current -= TerminationCurrentLimitMin;
        current >>= 7;
        return static_cast<u8>(current);
    }

    inline u32 DecodeTerminationCurrentLimit(u8 reg) {
        return TerminationCurrentLimitMin + (static_cast<u32>(reg & 0xF) << 7);
    }

    constexpr u32 MinimumSystemVoltageLimitMin = 3000;
    constexpr u32 MinimumSystemVoltageLimitMax = 3700;

    inline u8 EncodeMinimumSystemVoltageLimit(u32 voltage) {
        AMS_ASSERT(voltage >= MinimumSystemVoltageLimitMin);
        AMS_ASSERT(voltage <= MinimumSystemVoltageLimitMax);

        voltage -= MinimumSystemVoltageLimitMin;
        voltage /= 100;
        return static_cast<u8>(voltage << 1);
    }

    inline u32 DecodeMinimumSystemVoltageLimit(u8 reg) {
        return MinimumSystemVoltageLimitMin + (static_cast<u32>(reg & 0x0E) * 50);
    }

    enum WatchdogTimerSetting : u8 {
        WatchdogTimerSetting_Disabled = (0 << 4),
        WatchdogTimerSetting_40s      = (1 << 4),
        WatchdogTimerSetting_80s      = (2 << 4),
        WatchdogTimerSetting_160s     = (3 << 4),
    };

    enum BoostModeCurrentLimit : u8 {
        BoostModeCurrentLimit_500mA  = 0,
        BoostModeCurrentLimit_1300mA = 1,
    };

}