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Atmosphere/libraries/libexosphere/source/pmic/pmic_api.cpp

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/*
* Copyright (c) 2018-2020 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.h"
#include "max7762x.h"
namespace ams::pmic {
namespace {
constexpr inline int I2cAddressEristaMax77621 = 0x1B;
constexpr inline int I2cAddressMarikoMax77812_A = 0x31;
constexpr inline int I2cAddressMarikoMax77812_B = 0x33;
constexpr inline int I2cAddressMax77620Pmic = 0x3C;
/* https://github.com/Atmosphere-NX/Atmosphere/blob/master/emummc/source/power/max77620.h */
/* https://github.com/Atmosphere-NX/Atmosphere/blob/master/emummc/source/power/max7762x.h */
/* TODO: Find datasheet, link to it instead. */
/* NOTE: Tentatively, Max77620 "mostly" matches https://datasheets.maximintegrated.com/en/ds/MAX77863.pdf. */
/* This does not contain Max77621 documentation, though. */
constexpr inline int Max77620RegisterOnOffStat = 0x15;
constexpr inline int Max77620RegisterGpio0 = 0x36;
constexpr inline int Max77620RegisterAmeGpio = 0x40;
constexpr inline int Max77620RegisterOnOffCnfg1 = 0x41;
constexpr inline int Max77621RegisterVOut = 0x00;
constexpr inline int Max77621RegisterVOutDvc = 0x01;
constexpr inline int Max77621RegisterControl1 = 0x02;
constexpr inline int Max77621RegisterControl2 = 0x03;
/* https://datasheets.maximintegrated.com/en/ds/MAX77812.pdf */
constexpr inline int Max77812RegisterEnCtrl = 0x06;
constexpr inline int Max77812RegisterM4VOut = 0x26;
void Max77620EnableGpio(int gpio) {
u8 val;
/* Clear the AE for the GPIO */
if (i2c::Query(std::addressof(val), sizeof(val), i2c::Port_5, I2cAddressEristaMax77621, Max77620RegisterAmeGpio)) {
val &= ~(1 << gpio);
i2c::SendByte(i2c::Port_5, I2cAddressEristaMax77621, Max77620RegisterAmeGpio, val);
}
/* Set GPIO_DRV_PUSHPULL (bit 0), GPIO_OUTPUT_VAL_HIGH (bit 3). */
i2c::SendByte(i2c::Port_5, I2cAddressEristaMax77621, Max77620RegisterGpio0 + gpio, MAX77620_CNFG_GPIO_DRV_PUSHPULL | MAX77620_CNFG_GPIO_OUTPUT_VAL_HIGH);
}
void SetEnBitErista() {
i2c::SendByte(i2c::Port_5, I2cAddressEristaMax77621, Max77621RegisterVOut, MAX77621_VOUT_ENABLE);
}
void EnableVddCpuErista() {
/* Enable GPIO 5. */
/* TODO: What does this control? */
Max77620EnableGpio(5);
/* Configure Max77621 control registers. */
i2c::SendByte(i2c::Port_5, I2cAddressEristaMax77621, Max77621RegisterControl1, MAX77621_AD_ENABLE | MAX77621_NFSR_ENABLE | MAX77621_SNS_ENABLE | MAX77621_RAMP_12mV_PER_US);
i2c::SendByte(i2c::Port_5, I2cAddressEristaMax77621, Max77621RegisterControl2, MAX77621_T_JUNCTION_120 | MAX77621_WDTMR_ENABLE | MAX77621_CKKADV_TRIP_75mV_PER_US| MAX77621_INDUCTOR_NOMINAL);
/* Configure Max77621 VOut to 0.95v */
i2c::SendByte(i2c::Port_5, I2cAddressEristaMax77621, Max77621RegisterVOut, MAX77621_VOUT_ENABLE | MAX77621_VOUT_0_95V);
i2c::SendByte(i2c::Port_5, I2cAddressEristaMax77621, Max77621RegisterVOutDvc, MAX77621_VOUT_ENABLE | MAX77621_VOUT_0_95V);
}
void DisableVddCpuErista() {
/* Disable Max77621 VOut. */
i2c::SendByte(i2c::Port_5, I2cAddressEristaMax77621, Max77621RegisterVOut, MAX77621_VOUT_DISABLE);
}
int GetI2cAddressForMarikoMax77812(Regulator regulator) {
switch (regulator) {
case Regulator_Mariko_Max77812_A: return I2cAddressMarikoMax77812_A;
case Regulator_Mariko_Max77812_B: return I2cAddressMarikoMax77812_B;
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
void SetEnBitMariko(Regulator regulator) {
/* Set EN_M3_LPM to enable BUCK Master 3 low power mode. */
i2c::SendByte(i2c::Port_5, GetI2cAddressForMarikoMax77812(regulator), Max77812RegisterEnCtrl, 0x40);
}
void EnableVddCpuMariko(Regulator regulator) {
const int address = GetI2cAddressForMarikoMax77812(regulator);
/* Set EN_M3_LPM to enable BUCK Master 3 low power mode. */
u8 ctrl;
if (i2c::Query(std::addressof(ctrl), sizeof(ctrl), i2c::Port_5, address, Max77812RegisterEnCtrl)) {
ctrl |= 0x40;
i2c::SendByte(i2c::Port_5, address, Max77812RegisterEnCtrl, ctrl);
}
/* Set BUCK Master 4 output voltage to 110. */
i2c::SendByte(i2c::Port_5, address, Max77812RegisterM4VOut, 110);
}
void DisableVddCpuMariko(Regulator regulator) {
const int address = GetI2cAddressForMarikoMax77812(regulator);
/* Clear EN_M3_LPM to disable BUCK Master 3 low power mode. */
u8 ctrl;
if (i2c::Query(std::addressof(ctrl), sizeof(ctrl), i2c::Port_5, address, Max77812RegisterEnCtrl)) {
ctrl &= ~0x40;
i2c::SendByte(i2c::Port_5, address, Max77812RegisterEnCtrl, ctrl);
}
}
u8 GetPmicOnOffStat() {
return i2c::QueryByte(i2c::Port_5, I2cAddressMax77620Pmic, Max77620RegisterOnOffStat);
}
}
void SetEnBit(Regulator regulator) {
switch (regulator) {
case Regulator_Erista_Max77621:
return SetEnBitErista();
case Regulator_Mariko_Max77812_A:
case Regulator_Mariko_Max77812_B:
return SetEnBitMariko(regulator);
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
void EnableVddCpu(Regulator regulator) {
switch (regulator) {
case Regulator_Erista_Max77621:
return EnableVddCpuErista();
case Regulator_Mariko_Max77812_A:
case Regulator_Mariko_Max77812_B:
return EnableVddCpuMariko(regulator);
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
void DisableVddCpu(Regulator regulator) {
switch (regulator) {
case Regulator_Erista_Max77621:
return DisableVddCpuErista();
case Regulator_Mariko_Max77812_A:
case Regulator_Mariko_Max77812_B:
return DisableVddCpuMariko(regulator);
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
void EnableSleep() {
/* Get the current onoff cfg. */
u8 cnfg = i2c::QueryByte(i2c::Port_5, I2cAddressMax77620Pmic, Max77620RegisterOnOffCnfg1);
/* Set SlpEn. */
cnfg |= MAX77620_ONOFFCNFG1_SLPEN;
/* Write the new cfg. */
i2c::SendByte(i2c::Port_5, I2cAddressMax77620Pmic, Max77620RegisterOnOffCnfg1, cnfg);
}
void PowerOff() {
/* Write power-off to onoff cfg. */
i2c::SendByte(i2c::Port_5, I2cAddressMax77620Pmic, Max77620RegisterOnOffCnfg1, MAX77620_ONOFFCNFG1_PWR_OFF);
}
void ShutdownSystem(bool reboot) {
/* Get value, set or clear software reset mask. */
u8 on_off_2_val = i2c::QueryByte(i2c::Port_5, I2cAddressMax77620Pmic, MAX77620_REG_ONOFFCNFG2);
if (reboot) {
on_off_2_val |= MAX77620_ONOFFCNFG2_SFT_RST_WK;
} else {
on_off_2_val &= ~(MAX77620_ONOFFCNFG2_SFT_RST_WK);
}
i2c::SendByte(i2c::Port_5, I2cAddressMax77620Pmic, MAX77620_REG_ONOFFCNFG2, on_off_2_val);
/* Get value, set software reset mask. */
u8 on_off_1_val = i2c::QueryByte(i2c::Port_5, I2cAddressMax77620Pmic, MAX77620_REG_ONOFFCNFG1);
on_off_1_val |= MAX77620_ONOFFCNFG1_SFT_RST;
/* NOTE: Here, userland finalizes the battery on non-Calcio. */
if (fuse::GetHardwareType() != fuse::HardwareType_Calcio) {
/* ... */
}
/* Actually write the value to trigger shutdown/reset. */
i2c::SendByte(i2c::Port_5, I2cAddressMax77620Pmic, MAX77620_REG_ONOFFCNFG1, on_off_1_val);
/* Allow up to 5 seconds for shutdown/reboot to take place. */
util::WaitMicroSeconds(5'000'000ul);
AMS_ABORT("Shutdown failed");
}
bool IsAcOk() {
return (GetPmicOnOffStat() & (1 << 1)) != 0;
}
bool IsPowerButtonPressed() {
return (GetPmicOnOffStat() & (1 << 2)) != 0;
}
}
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