powctl: implement client api (needs board-specific impl)

libraries/libstratosphere/source/powctl/impl/board/nintendo_nx/powctl_board_impl.cpp

@@ -0,0 +1,31 @@
+/*
+ * 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 <stratosphere.hpp>
+#include "powctl_board_impl.hpp"
+
+namespace ams::powctl::impl::board::nintendo_nx {
+
+    void Initialize(bool use_event_handlers) {
+        /* TODO */
+        AMS_ABORT();
+    }
+
+    void Finalize() {
+        /* TODO */
+        AMS_ABORT();
+    }
+
+}

libraries/libstratosphere/source/powctl/impl/board/nintendo_nx/powctl_board_impl.hpp

@@ -0,0 +1,26 @@
+/*
+ * 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/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+
+#include "powctl_interrupt_event_handler.hpp"
+
+namespace ams::powctl::impl::board::nintendo_nx {
+
+    void Initialize(bool use_event_handlers);
+    void Finalize();
+
+}

libraries/libstratosphere/source/powctl/impl/board/nintendo_nx/powctl_interrupt_event_handler.cpp

@@ -0,0 +1,31 @@
+/*
+ * 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 <stratosphere.hpp>
+#include "powctl_interrupt_event_handler.hpp"
+
+namespace ams::powctl::impl::board::nintendo_nx {
+
+    void ChargerInterruptEventHandler::SignalEvent(IDevice *device) {
+        /* TODO */
+        AMS_ABORT();
+    }
+
+    void BatteryInterruptEventHandler::SignalEvent(IDevice *device) {
+        /* TODO */
+        AMS_ABORT();
+    }
+
+}

libraries/libstratosphere/source/powctl/impl/board/nintendo_nx/powctl_interrupt_event_handler.hpp

@@ -0,0 +1,94 @@
+/*
+ * 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/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+#include "../../powctl_i_power_control_driver.hpp"
+
+namespace ams::powctl::impl::board::nintendo_nx {
+
+    template<typename Derived>
+    class InterruptEventHandler : public ddsf::IEventHandler {
+        private:
+            IDevice *device;
+            gpio::GpioPadSession gpio_session;
+            os::SystemEventType gpio_system_event;
+            os::SdkMutex mutex;
+        public:
+            InterruptEventHandler(IDevice *dv) : IEventHandler(), device(dv), mutex() {
+                /* Initialize the gpio session. */
+                Derived::Initialize(std::addressof(this->gpio_session), std::addressof(this->gpio_system_event));
+
+                /* Initialize ourselves as an event handler. */
+                IEventHandler::Initialize(std::addressof(this->gpio_system_event));
+            }
+
+            os::SystemEventType *GetSystemEvent() {
+                return std::addressof(this->gpio_system_event);
+            }
+
+            virtual void HandleEvent() override final {
+                /* Acquire exclusive access to ourselves. */
+                std::scoped_lock lk(this->mutex);
+
+                /* Clear our interrupt status. */
+                gpio::ClearInterruptStatus(std::addressof(this->gpio_session));
+
+                /* Clear our system event. */
+                os::ClearSystemEvent(std::addressof(this->gpio_system_event));
+
+                /* Signal the event. */
+                Derived::SignalEvent(this->device);
+            }
+    };
+
+    class ChargerInterruptEventHandler : public InterruptEventHandler<ChargerInterruptEventHandler> {
+        friend class InterruptEventHandler<ChargerInterruptEventHandler>;
+        private:
+            static void Initialize(gpio::GpioPadSession *session, os::SystemEventType *event) {
+                /* Open the gpio session. */
+                R_ABORT_UNLESS(gpio::OpenSession(session, gpio::DeviceCode_Bq24190Irq));
+
+                /* Configure the gpio session. */
+                gpio::SetDirection(session, gpio::Direction_Input);
+                gpio::SetInterruptMode(session, gpio::InterruptMode_FallingEdge);
+                gpio::SetInterruptEnable(session, true);
+
+                /* Bind the interrupt event. */
+                R_ABORT_UNLESS(gpio::BindInterrupt(event, session));
+            }
+
+            void SignalEvent(IDevice *device);
+    };
+
+    class BatteryInterruptEventHandler : public InterruptEventHandler<BatteryInterruptEventHandler> {
+        friend class InterruptEventHandler<BatteryInterruptEventHandler>;
+        private:
+            static void Initialize(gpio::GpioPadSession *session, os::SystemEventType *event) {
+                /* Open the gpio session. */
+                R_ABORT_UNLESS(gpio::OpenSession(session, gpio::DeviceCode_BattMgicIrq));
+
+                /* Configure the gpio session. */
+                gpio::SetDirection(session, gpio::Direction_Input);
+                gpio::SetInterruptMode(session, gpio::InterruptMode_LowLevel);
+
+                /* Bind the interrupt event. */
+                R_ABORT_UNLESS(gpio::BindInterrupt(event, session));
+            }
+
+            void SignalEvent(IDevice *device);
+    };
+
+}

libraries/libstratosphere/source/powctl/impl/board/nintendo_nx/powctl_retry_helper.hpp

@@ -0,0 +1,41 @@
+/*
+ * 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/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+
+namespace ams::powctl::impl {
+
+    constexpr inline const TimeSpan PowerControlRetryTimeout  = TimeSpan::FromSeconds(10);
+    constexpr inline const TimeSpan PowerControlRetryInterval = TimeSpan::FromMilliSeconds(20);
+
+    #define AMS_POWCTL_R_TRY_WITH_RETRY(__EXPR__)                                                        \
+        ({                                                                                               \
+            TimeSpan __powctl_retry_current_time = 0;                                                    \
+            while (true) {                                                                               \
+                const Result __powctl_retry_result = (__EXPR__);                                         \
+                if (R_SUCCEEDED(__powctl_retry_result)) {                                                \
+                    break;                                                                               \
+                }                                                                                        \
+                                                                                                         \
+                __powctl_retry_current_time += PowerControlRetryInterval;                                \
+                R_UNLESS(__powctl_retry_current_time < PowerControlRetryTimeout, __powctl_retry_result); \
+                                                                                                         \
+                os::SleepThread(PowerControlRetryInterval);                                              \
+            }                                                                                            \
+        })
+
+
+}

libraries/libstratosphere/source/powctl/impl/powctl_charger_driver.hpp

@@ -0,0 +1,136 @@
+/*
+ * 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/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+
+namespace ams::powctl::impl {
+
+    class IDevice : public ::ams::ddsf::IDevice {
+        NON_COPYABLE(IDevice);
+        NON_MOVEABLE(IDevice);
+        AMS_DDSF_CASTABLE_TRAITS(ams::powctl::impl::IDevice, ::ams::ddsf::IDevice);
+        public:
+            IDevice() : ddsf::IDevice(false) { /* ... */ }
+            virtual ~IDevice() { /* ... */ }
+    };
+
+    class IPowerControlDriver : public ::ams::ddsf::IDriver {
+        NON_COPYABLE(IPowerControlDriver);
+        NON_MOVEABLE(IPowerControlDriver);
+        AMS_DDSF_CASTABLE_TRAITS(ams::powctl::impl::IPowerControlDriver, ::ams::ddsf::IDriver);
+        private:
+            bool event_handler_enabled;
+        protected:
+            constexpr bool IsEventHandlerEnabled() const {
+                return this->event_handler_enabled;
+            }
+        public:
+            IPowerControlDriver(bool ev) : IDriver(), event_handler_enabled(ev) { /* ... */ }
+            virtual ~IPowerControlDriver() { /* ... */ }
+
+            virtual void InitializeDriver() = 0;
+            virtual void FinalizeDriver() = 0;
+
+            virtual Result GetDeviceSystemEvent(IDevice *device) = 0;
+            virtual Result SetDeviceInterruptEnabled(IDevice *device, bool enable) = 0;
+
+            /* TODO: Eventually implement proper error status enum? */
+            virtual Result GetDeviceErrorStatus(u32 *out, IDevice *device) = 0;
+            virtual Result SetDeviceErrorStatus(IDevice *device, u32 status) = 0;
+
+            virtual Result GetBatterySocRep(float *out_percent, IDevice *device) = 0;
+
+            virtual Result GetBatterySocVf(float *out_percent, IDevice *device) = 0;
+
+            virtual Result GetBatteryFullCapacity(u32 *out_mah, IDevice *device) = 0;
+            virtual Result GetBatteryRemainingCapacity(u32 *out_mah, IDevice *device) = 0;
+
+            virtual Result SetBatteryPercentageMinimumAlertThreshold(IDevice *device, float percentage) = 0;
+            virtual Result SetBatteryPercentageMaximumAlertThreshold(IDevice *device, float percentage) = 0;
+            virtual Result SetBatteryPercentageFullThreshold(IDevice *device, float percentage) = 0;
+
+            virtual Result GetChargerChargeCurrentState(ChargeCurrentState *out, IDevice *device) = 0;
+            virtual Result SetChargerChargeCurrentState(IDevice *device, ChargeCurrentState state) = 0;
+
+            virtual Result GetChargerFastChargeCurrentLimit(u32 *out_ma, IDevice *device) = 0;
+            virtual Result SetChargerFastChargeCurrentLimit(IDevice *device, u32 ma) = 0;
+
+            virtual Result GetChargerChargeVoltageLimit(u32 *out_mv, IDevice *device) = 0;
+            virtual Result SetChargerChargeVoltageLimit(IDevice *device, u32 mv) = 0;
+
+            virtual Result SetChargerChargerConfiguration(IDevice *device, ChargerConfiguration cfg) = 0;
+
+            virtual Result IsChargerHiZEnabled(bool *out, IDevice *device) = 0;
+            virtual Result SetChargerHiZEnabled(IDevice *device, bool en) = 0;
+
+            virtual Result GetBatteryAverageCurrent(u32 *out_ma, IDevice *device) = 0;
+            virtual Result GetBatteryCurrent(u32 *out_ma, IDevice *device) = 0;
+
+            virtual Result GetChargerInputCurrentLimit(u32 *out_ma, IDevice *device) = 0;
+            virtual Result SetChargerInputCurrentLimit(IDevice *device, u32 ma) = 0;
+
+            virtual Result GetChargerInputVoltageLimit(u32 *out_mv, IDevice *device) = 0;
+            virtual Result SetChargerInputVoltageLimit(IDevice *device, u32 mv) = 0;
+
+            virtual Result GetBatteryInternalState(void *dst, size_t *out_size, IDevice *device, size_t dst_size) = 0;
+            virtual Result SetBatteryInternalState(IDevice *device, const void *src, size_t src_size) = 0;
+
+            virtual Result GetBatteryNeedToRestoreParameters(bool *out, IDevice *device) = 0;
+            virtual Result SetBatteryNeedToRestoreParameters(IDevice *device, bool en) = 0;
+
+            virtual Result IsBatteryI2cShutdownEnabled(bool *out, IDevice *device) = 0;
+            virtual Result SetBatteryI2cShutdownEnabled(IDevice *device, bool en) = 0;
+
+            virtual Result IsBatteryRemoved(bool *out, IDevice *device) = 0;
+
+            virtual Result GetChargerChargerStatus(ChargerStatus *out, IDevice *device) = 0;
+
+            virtual Result GetBatteryCycles(u32 *out, IDevice *device) = 0;
+            virtual Result SetBatteryCycles(IDevice *device, u32 cycles) = 0;
+
+            virtual Result GetBatteryAge(float *out_percent, IDevice *device) = 0;
+
+            virtual Result GetBatteryTemperature(float *out_c, IDevice *device) = 0;
+            virtual Result GetBatteryMaximumTemperature(float *out_c, IDevice *device) = 0;
+
+            virtual Result SetBatteryTemperatureMinimumAlertThreshold(IDevice *device, float c) = 0;
+            virtual Result SetBatteryTemperatureMaximumAlertThreshold(IDevice *device, float c) = 0;
+
+            virtual Result GetBatteryVCell(u32 *out_mv, IDevice *device) = 0;
+            virtual Result GetBatteryAverageVCell(u32 *out_mv, IDevice *device) = 0;
+
+            virtual Result GetBatteryAverageVCellTime(TimeSpan *out, IDevice *device) = 0;
+
+            virtual Result SetBatteryVoltageMinimumAlertThreshold(IDevice *device, u32 mv) = 0;
+
+            virtual Result GetBatteryOpenCircuitVoltage(u32 *out_mv, IDevice *device) = 0;
+
+            virtual Result SetBatteryVoltageMaximumAlertThreshold(IDevice *device, u32 mv) = 0;
+
+            virtual Result IsChargerWatchdogTimerEnabled(bool *out, IDevice *device) = 0;
+            virtual Result SetChargerWatchdogTimerEnabled(IDevice *device, bool en) = 0;
+
+            virtual Result SetChargerWatchdogTimerTimeout(IDevice *device, TimeSpan timeout) = 0;
+            virtual Result ResetChargerWatchdogTimer(IDevice *device) = 0;
+
+            virtual Result GetChargerBatteryCompensation(u32 *out_mo, IDevice *device) = 0;
+            virtual Result SetChargerBatteryCompensation(IDevice *device, u32 mo) = 0;
+
+            virtual Result GetChargerVoltageClamp(u32 *out_mv, IDevice *device) = 0;
+            virtual Result SetChargerVoltageClamp(IDevice *device, u32 mv) = 0;
+    };
+
+}

libraries/libstratosphere/source/powctl/impl/powctl_device_management.cpp

@@ -0,0 +1,138 @@
+/*
+ * 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 <stratosphere.hpp>
+#include "powctl_device_management.hpp"
+
+namespace ams::powctl::impl {
+
+    namespace {
+
+        os::ThreadType g_interrupt_thread;
+
+        constexpr inline size_t InterruptThreadStackSize = os::MemoryPageSize;
+        alignas(os::MemoryPageSize) u8 g_interrupt_thread_stack[InterruptThreadStackSize];
+
+        constinit u8 g_unit_heap_memory[2_KB];
+        constinit lmem::HeapHandle g_unit_heap_handle;
+        constinit sf::UnitHeapMemoryResource g_unit_heap_memory_resource;
+
+        IPowerControlDriver::List &GetDriverList() {
+            static IPowerControlDriver::List s_driver_list;
+            return s_driver_list;
+        }
+
+        ddsf::EventHandlerManager &GetInterruptHandlerManager() {
+            static ddsf::EventHandlerManager s_interrupt_handler_manager;
+            return s_interrupt_handler_manager;
+        }
+
+        ddsf::DeviceCodeEntryManager &GetDeviceCodeEntryManager() {
+            static ddsf::DeviceCodeEntryManager s_device_code_entry_manager = [] {
+                /* Initialize the entry code heap. */
+                g_unit_heap_handle = lmem::CreateUnitHeap(g_unit_heap_memory, sizeof(g_unit_heap_memory), sizeof(ddsf::DeviceCodeEntryHolder), lmem::CreateOption_ThreadSafe);
+
+                /* Initialize the entry code memory resource. */
+                g_unit_heap_memory_resource.Attach(g_unit_heap_handle);
+
+                /* Make the entry manager using the newly initialized memory resource. */
+                return ddsf::DeviceCodeEntryManager(std::addressof(g_unit_heap_memory_resource));
+            }();
+
+            return s_device_code_entry_manager;
+        }
+
+        void InterruptThreadFunction(void *arg) {
+            AMS_UNUSED(arg);
+            GetInterruptHandlerManager().LoopAuto();
+        }
+
+    }
+
+    void InitializeDrivers() {
+        /* Ensure the event handler manager is initialized. */
+        GetInterruptHandlerManager().Initialize();
+
+        /* Initialize all registered drivers. */
+        for (auto &driver : GetDriverList()) {
+            driver.SafeCastTo<IPowerControlDriver>().InitializeDriver();
+        }
+
+        /* Create the interrupt thread. */
+        R_ABORT_UNLESS(os::CreateThread(std::addressof(g_interrupt_thread), InterruptThreadFunction, nullptr, g_interrupt_thread_stack, InterruptThreadStackSize, AMS_GET_SYSTEM_THREAD_PRIORITY(powctl, InterruptHandler)));
+        os::SetThreadNamePointer(std::addressof(g_interrupt_thread), AMS_GET_SYSTEM_THREAD_NAME(powctl, InterruptHandler));
+        os::StartThread(std::addressof(g_interrupt_thread));
+
+        /* Wait for the interrupt thread to enter the loop. */
+        GetInterruptHandlerManager().WaitLoopEnter();
+    }
+
+    void FinalizeDrivers() {
+        /* Request the interrupt thread stop. */
+        GetInterruptHandlerManager().RequestStop();
+        os::WaitThread(std::addressof(g_interrupt_thread));
+        os::DestroyThread(std::addressof(g_interrupt_thread));
+
+        /* TODO: What else? */
+        AMS_ABORT();
+    }
+
+    void RegisterDriver(IPowerControlDriver *driver) {
+        AMS_ASSERT(driver != nullptr);
+        GetDriverList().push_back(*driver);
+    }
+
+    void UnregisterDriver(IPowerControlDriver *driver) {
+        AMS_ASSERT(driver != nullptr);
+        if (driver->IsLinkedToList()) {
+            auto &list = GetDriverList();
+            list.erase(list.iterator_to(*driver));
+        }
+    }
+
+    Result RegisterDeviceCode(DeviceCode device_code, IDevice *device) {
+        AMS_ASSERT(device != nullptr);
+        R_TRY(GetDeviceCodeEntryManager().Add(device_code, device));
+        return ResultSuccess();
+    }
+
+    bool UnregisterDeviceCode(DeviceCode device_code) {
+        return GetDeviceCodeEntryManager().Remove(device_code);
+    }
+
+    void RegisterInterruptHandler(ddsf::IEventHandler *handler) {
+        AMS_ASSERT(handler != nullptr);
+        GetInterruptHandlerManager().RegisterHandler(handler);
+    }
+
+    void UnregisterInterruptHandler(ddsf::IEventHandler *handler) {
+        AMS_ASSERT(handler != nullptr);
+        GetInterruptHandlerManager().UnregisterHandler(handler);
+    }
+
+    Result FindDevice(powctl::impl::IDevice **out, DeviceCode device_code) {
+        /* Validate output. */
+        AMS_ASSERT(out != nullptr);
+
+        /* Find the device. */
+        ddsf::IDevice *device;
+        R_TRY(GetDeviceCodeEntryManager().FindDevice(std::addressof(device), device_code));
+
+        /* Set output. */
+        *out = device->SafeCastToPointer<powctl::impl::IDevice>();
+        return ResultSuccess();
+    }
+
+}

libraries/libstratosphere/source/powctl/impl/powctl_device_management.hpp

@@ -0,0 +1,36 @@
+/*
+ * 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/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+#include "powctl_i_power_control_driver.hpp"
+
+namespace ams::powctl::impl {
+
+    void InitializeDrivers();
+    void FinalizeDrivers();
+
+    void RegisterDriver(IPowerControlDriver *driver);
+    void UnregisterDriver(IPowerControlDriver *driver);
+
+    Result RegisterDeviceCode(DeviceCode device_code, IDevice *device);
+    bool UnregisterDeviceCode(DeviceCode device_code);
+
+    void RegisterInterruptHandler(ddsf::IEventHandler *handler);
+    void UnregisterInterruptHandler(ddsf::IEventHandler *handler);
+
+    Result FindDevice(IDevice **out, DeviceCode device_code);
+
+}

libraries/libstratosphere/source/powctl/impl/powctl_i_power_control_driver.hpp

@@ -0,0 +1,136 @@
+/*
+ * 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/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+
+namespace ams::powctl::impl {
+
+    class IDevice : public ::ams::ddsf::IDevice {
+        NON_COPYABLE(IDevice);
+        NON_MOVEABLE(IDevice);
+        AMS_DDSF_CASTABLE_TRAITS(ams::powctl::impl::IDevice, ::ams::ddsf::IDevice);
+        public:
+            IDevice() : ddsf::IDevice(false) { /* ... */ }
+            virtual ~IDevice() { /* ... */ }
+    };
+
+    class IPowerControlDriver : public ::ams::ddsf::IDriver {
+        NON_COPYABLE(IPowerControlDriver);
+        NON_MOVEABLE(IPowerControlDriver);
+        AMS_DDSF_CASTABLE_TRAITS(ams::powctl::impl::IPowerControlDriver, ::ams::ddsf::IDriver);
+        private:
+            bool event_handler_enabled;
+        protected:
+            constexpr bool IsEventHandlerEnabled() const {
+                return this->event_handler_enabled;
+            }
+        public:
+            IPowerControlDriver(bool ev) : IDriver(), event_handler_enabled(ev) { /* ... */ }
+            virtual ~IPowerControlDriver() { /* ... */ }
+
+            virtual void InitializeDriver() = 0;
+            virtual void FinalizeDriver() = 0;
+
+            virtual Result GetDeviceSystemEvent(IDevice *device) = 0;
+            virtual Result SetDeviceInterruptEnabled(IDevice *device, bool enable) = 0;
+
+            /* TODO: Eventually implement proper error status enum? */
+            virtual Result GetDeviceErrorStatus(u32 *out, IDevice *device) = 0;
+            virtual Result SetDeviceErrorStatus(IDevice *device, u32 status) = 0;
+
+            virtual Result GetBatterySocRep(float *out_percent, IDevice *device) = 0;
+
+            virtual Result GetBatterySocVf(float *out_percent, IDevice *device) = 0;
+
+            virtual Result GetBatteryFullCapacity(u32 *out_mah, IDevice *device) = 0;
+            virtual Result GetBatteryRemainingCapacity(u32 *out_mah, IDevice *device) = 0;
+
+            virtual Result SetBatteryPercentageMinimumAlertThreshold(IDevice *device, float percentage) = 0;
+            virtual Result SetBatteryPercentageMaximumAlertThreshold(IDevice *device, float percentage) = 0;
+            virtual Result SetBatteryPercentageFullThreshold(IDevice *device, float percentage) = 0;
+
+            virtual Result GetChargerChargeCurrentState(ChargeCurrentState *out, IDevice *device) = 0;
+            virtual Result SetChargerChargeCurrentState(IDevice *device, ChargeCurrentState state) = 0;
+
+            virtual Result GetChargerFastChargeCurrentLimit(u32 *out_ma, IDevice *device) = 0;
+            virtual Result SetChargerFastChargeCurrentLimit(IDevice *device, u32 ma) = 0;
+
+            virtual Result GetChargerChargeVoltageLimit(u32 *out_mv, IDevice *device) = 0;
+            virtual Result SetChargerChargeVoltageLimit(IDevice *device, u32 mv) = 0;
+
+            virtual Result SetChargerChargerConfiguration(IDevice *device, ChargerConfiguration cfg) = 0;
+
+            virtual Result IsChargerHiZEnabled(bool *out, IDevice *device) = 0;
+            virtual Result SetChargerHiZEnabled(IDevice *device, bool en) = 0;
+
+            virtual Result GetBatteryAverageCurrent(u32 *out_ma, IDevice *device) = 0;
+            virtual Result GetBatteryCurrent(u32 *out_ma, IDevice *device) = 0;
+
+            virtual Result GetChargerInputCurrentLimit(u32 *out_ma, IDevice *device) = 0;
+            virtual Result SetChargerInputCurrentLimit(IDevice *device, u32 ma) = 0;
+
+            virtual Result GetChargerInputVoltageLimit(u32 *out_mv, IDevice *device) = 0;
+            virtual Result SetChargerInputVoltageLimit(IDevice *device, u32 mv) = 0;
+
+            virtual Result GetBatteryInternalState(void *dst, size_t *out_size, IDevice *device, size_t dst_size) = 0;
+            virtual Result SetBatteryInternalState(IDevice *device, const void *src, size_t src_size) = 0;
+
+            virtual Result GetBatteryNeedToRestoreParameters(bool *out, IDevice *device) = 0;
+            virtual Result SetBatteryNeedToRestoreParameters(IDevice *device, bool en) = 0;
+
+            virtual Result IsBatteryI2cShutdownEnabled(bool *out, IDevice *device) = 0;
+            virtual Result SetBatteryI2cShutdownEnabled(IDevice *device, bool en) = 0;
+
+            virtual Result IsBatteryRemoved(bool *out, IDevice *device) = 0;
+
+            virtual Result GetChargerChargerStatus(ChargerStatus *out, IDevice *device) = 0;
+
+            virtual Result GetBatteryCycles(u32 *out, IDevice *device) = 0;
+            virtual Result SetBatteryCycles(IDevice *device, u32 cycles) = 0;
+
+            virtual Result GetBatteryAge(float *out_percent, IDevice *device) = 0;
+
+            virtual Result GetBatteryTemperature(float *out_c, IDevice *device) = 0;
+            virtual Result GetBatteryMaximumTemperature(float *out_c, IDevice *device) = 0;
+
+            virtual Result SetBatteryTemperatureMinimumAlertThreshold(IDevice *device, float c) = 0;
+            virtual Result SetBatteryTemperatureMaximumAlertThreshold(IDevice *device, float c) = 0;
+
+            virtual Result GetBatteryVCell(u32 *out_mv, IDevice *device) = 0;
+            virtual Result GetBatteryAverageVCell(u32 *out_mv, IDevice *device) = 0;
+
+            virtual Result GetBatteryAverageVCellTime(TimeSpan *out, IDevice *device) = 0;
+
+            virtual Result SetBatteryVoltageMinimumAlertThreshold(IDevice *device, u32 mv) = 0;
+
+            virtual Result GetBatteryOpenCircuitVoltage(u32 *out_mv, IDevice *device) = 0;
+
+            virtual Result SetBatteryVoltageMaximumAlertThreshold(IDevice *device, u32 mv) = 0;
+
+            virtual Result IsChargerWatchdogTimerEnabled(bool *out, IDevice *device) = 0;
+            virtual Result SetChargerWatchdogTimerEnabled(IDevice *device, bool en) = 0;
+
+            virtual Result SetChargerWatchdogTimerTimeout(IDevice *device, TimeSpan timeout) = 0;
+            virtual Result ResetChargerWatchdogTimer(IDevice *device) = 0;
+
+            virtual Result GetChargerBatteryCompensation(u32 *out_mo, IDevice *device) = 0;
+            virtual Result SetChargerBatteryCompensation(IDevice *device, u32 mo) = 0;
+
+            virtual Result GetChargerVoltageClamp(u32 *out_mv, IDevice *device) = 0;
+            virtual Result SetChargerVoltageClamp(IDevice *device, u32 mv) = 0;
+    };
+
+}

libraries/libstratosphere/source/powctl/impl/powctl_select_board_driver.hpp

@@ -0,0 +1,32 @@
+/*
+ * 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/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+#include "powctl_i_power_control_driver.hpp"
+
+#if defined(ATMOSPHERE_BOARD_NINTENDO_NX)
+
+    #include "board/nintendo_nx/powctl_board_impl.hpp"
+
+    namespace ams::powctl::impl::board {
+        using namespace ams::powctl::impl::board::nintendo_nx;
+    }
+
+#else
+
+    #error "Unknown board for ams::powctl::impl"
+
+#endif

libraries/libstratosphere/source/powctl/powctl_battery_api.cpp

@@ -0,0 +1,439 @@
+/*
+ * 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 <stratosphere.hpp>
+#include "impl/powctl_i_power_control_driver.hpp"
+#include "impl/powctl_device_management.hpp"
+
+namespace ams::powctl {
+
+    namespace {
+
+        impl::SessionImpl &GetOpenSessionImpl(Session &session) {
+            AMS_ASSERT(session.has_session);
+            auto &impl = GetReference(session.impl_storage);
+            AMS_ASSERT(impl.IsOpen());
+            return impl;
+        }
+
+    }
+
+    Result GetBatterySocRep(float *out_percent, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatterySocRep(out_percent, std::addressof(device));
+    }
+
+    Result GetBatterySocVf(float *out_percent, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatterySocVf(out_percent, std::addressof(device));
+    }
+
+    Result GetBatteryFullCapacity(u32 *out_mah, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryFullCapacity(out_mah, std::addressof(device));
+    }
+
+    Result GetBatteryRemainingCapacity(u32 *out_mah, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryRemainingCapacity(out_mah, std::addressof(device));
+    }
+
+    Result SetBatteryPercentageMinimumAlertThreshold(Session &session, float percentage) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetBatteryPercentageMinimumAlertThreshold(std::addressof(device), percentage);
+    }
+
+    Result SetBatteryPercentageMaximumAlertThreshold(Session &session, float percentage) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetBatteryPercentageMaximumAlertThreshold(std::addressof(device), percentage);
+    }
+
+    Result SetBatteryPercentageFullThreshold(Session &session, float percentage) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetBatteryPercentageFullThreshold(std::addressof(device), percentage);
+    }
+
+    Result GetBatteryAverageCurrent(u32 *out_ma, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryAverageCurrent(out_ma, std::addressof(device));
+    }
+
+    Result GetBatteryCurrent(u32 *out_ma, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryCurrent(out_ma, std::addressof(device));
+    }
+
+    Result GetBatteryInternalState(void *dst, size_t *out_size, Session &session, size_t dst_size) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryInternalState(dst, out_size, std::addressof(device), dst_size);
+    }
+
+    Result SetBatteryInternalState(Session &session, const void *src, size_t src_size) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetBatteryInternalState(std::addressof(device), src, src_size);
+    }
+
+    Result GetBatteryNeedToRestoreParameters(bool *out, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryNeedToRestoreParameters(out, std::addressof(device));
+    }
+
+    Result SetBatteryNeedToRestoreParameters(Session &session, bool en) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetBatteryNeedToRestoreParameters(std::addressof(device), en);
+    }
+
+    Result IsBatteryI2cShutdownEnabled(bool *out, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().IsBatteryI2cShutdownEnabled(out, std::addressof(device));
+    }
+
+    Result SetBatteryI2cShutdownEnabled(Session &session, bool en) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetBatteryI2cShutdownEnabled(std::addressof(device), en);
+    }
+
+    Result IsBatteryRemoved(bool *out, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().IsBatteryRemoved(out, std::addressof(device));
+    }
+
+    Result GetBatteryCycles(u32 *out, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryCycles(out, std::addressof(device));
+    }
+
+    Result SetBatteryCycles(Session &session, u32 cycles) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetBatteryCycles(std::addressof(device), cycles);
+    }
+
+    Result GetBatteryAge(float *out_percent, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryAge(out_percent, std::addressof(device));
+    }
+
+    Result GetBatteryTemperature(float *out_c, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryTemperature(out_c, std::addressof(device));
+    }
+
+    Result GetBatteryMaximumTemperature(float *out_c, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryMaximumTemperature(out_c, std::addressof(device));
+    }
+
+    Result SetBatteryTemperatureMinimumAlertThreshold(Session &session, float c) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetBatteryTemperatureMinimumAlertThreshold(std::addressof(device), c);
+    }
+
+    Result SetBatteryTemperatureMaximumAlertThreshold(Session &session, float c) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetBatteryTemperatureMaximumAlertThreshold(std::addressof(device), c);
+    }
+
+    Result GetBatteryVCell(u32 *out_mv, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryVCell(out_mv, std::addressof(device));
+    }
+
+    Result GetBatteryAverageVCell(u32 *out_mv, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryAverageVCell(out_mv, std::addressof(device));
+    }
+
+    Result GetBatteryAverageVCellTime(TimeSpan *out, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryAverageVCellTime(out, std::addressof(device));
+    }
+
+    Result GetBatteryOpenCircuitVoltage(u32 *out_mv, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetBatteryOpenCircuitVoltage(out_mv, std::addressof(device));
+    }
+
+    Result SetBatteryVoltageMinimumAlertThreshold(Session &session, u32 mv) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetBatteryVoltageMinimumAlertThreshold(std::addressof(device), mv);
+    }
+
+    Result SetBatteryVoltageMaximumAlertThreshold(Session &session, u32 mv) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetBatteryVoltageMaximumAlertThreshold(std::addressof(device), mv);
+    }
+
+}

libraries/libstratosphere/source/powctl/powctl_charger_api.cpp

@@ -0,0 +1,329 @@
+/*
+ * 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 <stratosphere.hpp>
+#include "impl/powctl_i_power_control_driver.hpp"
+#include "impl/powctl_device_management.hpp"
+
+namespace ams::powctl {
+
+    namespace {
+
+        impl::SessionImpl &GetOpenSessionImpl(Session &session) {
+            AMS_ASSERT(session.has_session);
+            auto &impl = GetReference(session.impl_storage);
+            AMS_ASSERT(impl.IsOpen());
+            return impl;
+        }
+
+    }
+
+    Result GetChargerChargeCurrentState(ChargeCurrentState *out, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetChargerChargeCurrentState(out, std::addressof(device));
+    }
+
+    Result SetChargerChargeCurrentState(Session &session, ChargeCurrentState state) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetChargerChargeCurrentState(std::addressof(device), state);
+    }
+
+    Result GetChargerFastChargeCurrentLimit(u32 *out_ma, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetChargerFastChargeCurrentLimit(out_ma, std::addressof(device));
+    }
+
+    Result SetChargerFastChargeCurrentLimit(Session &session, u32 ma) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetChargerFastChargeCurrentLimit(std::addressof(device), ma);
+    }
+
+    Result GetChargerChargeVoltageLimit(u32 *out_mv, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetChargerChargeVoltageLimit(out_mv, std::addressof(device));
+    }
+
+    Result SetChargerChargeVoltageLimit(Session &session, u32 mv) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetChargerChargeVoltageLimit(std::addressof(device), mv);
+    }
+
+    Result SetChargerChargerConfiguration(Session &session, ChargerConfiguration cfg) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetChargerChargerConfiguration(std::addressof(device), cfg);
+    }
+
+    Result IsChargerHiZEnabled(bool *out, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().IsChargerHiZEnabled(out, std::addressof(device));
+    }
+
+    Result SetChargerHiZEnabled(Session &session, bool en) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetChargerHiZEnabled(std::addressof(device), en);
+    }
+
+    Result GetChargerInputCurrentLimit(u32 *out_ma, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetChargerInputCurrentLimit(out_ma, std::addressof(device));
+    }
+
+    Result SetChargerInputCurrentLimit(Session &session, u32 ma) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetChargerInputCurrentLimit(std::addressof(device), ma);
+    }
+
+    Result GetChargerInputVoltageLimit(u32 *out_mv, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetChargerInputVoltageLimit(out_mv, std::addressof(device));
+    }
+
+    Result SetChargerInputVoltageLimit(Session &session, u32 mv) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetChargerInputVoltageLimit(std::addressof(device), mv);
+    }
+
+    Result GetChargerChargerStatus(ChargerStatus *out, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetChargerChargerStatus(out, std::addressof(device));
+    }
+
+    Result IsChargerWatchdogTimerEnabled(bool *out, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().IsChargerWatchdogTimerEnabled(out, std::addressof(device));
+    }
+
+    Result SetChargerWatchdogTimerEnabled(Session &session, bool en) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetChargerWatchdogTimerEnabled(std::addressof(device), en);
+    }
+
+    Result SetChargerWatchdogTimerTimeout(Session &session, TimeSpan timeout) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetChargerWatchdogTimerTimeout(std::addressof(device), timeout);
+    }
+
+    Result ResetChargerWatchdogTimer(Session &session);
+
+    Result GetChargerBatteryCompensation(u32 *out_mo, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetChargerBatteryCompensation(out_mo, std::addressof(device));
+    }
+
+    Result SetChargerBatteryCompensation(Session &session, u32 mo) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetChargerBatteryCompensation(std::addressof(device), mo);
+    }
+
+    Result GetChargerVoltageClamp(u32 *out_mv, Session &session) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Read));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().GetChargerVoltageClamp(out_mv, std::addressof(device));
+    }
+
+    Result SetChargerVoltageClamp(Session &session, u32 mv) {
+        /* Get the session impl. */
+        auto &impl = GetOpenSessionImpl(session);
+
+        /* Check the access mode. */
+        R_TRY(impl.CheckAccess(ddsf::AccessMode_Write));
+
+        /* Get the device. */
+        auto &device = impl.GetDevice().SafeCastTo<impl::IDevice>();
+
+        /* Call into the driver. */
+        return device.GetDriver().SafeCastTo<impl::IPowerControlDriver>().SetChargerVoltageClamp(std::addressof(device), mv);
+    }
+
+}

libraries/libstratosphere/source/powctl/powctl_driver_api.cpp

@@ -0,0 +1,39 @@
+/*
+ * 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 <stratosphere.hpp>
+#include "impl/powctl_select_board_driver.hpp"
+#include "impl/powctl_device_management.hpp"
+
+namespace ams::powctl {
+
+    void Initialize(bool enable_interrupt_handlers) {
+        /* Initialize the board driver. */
+        impl::board::Initialize(enable_interrupt_handlers);
+
+        /* Initialize drivers. */
+        impl::InitializeDrivers();
+
+    }
+
+    void Finalize() {
+        /* Finalize drivers. */
+        impl::FinalizeDrivers();
+
+        /* Finalize the board driver. */
+        impl::board::Finalize();
+    }
+
+}

libraries/libstratosphere/source/powctl/powctl_session_api.cpp

@@ -0,0 +1,89 @@
+/*
+ * 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 <stratosphere.hpp>
+#include "impl/powctl_device_management.hpp"
+
+namespace ams::powctl {
+
+    namespace {
+
+        ddsf::AccessMode SanitizeAccessMode(ddsf::AccessMode access_mode) {
+            switch (access_mode) {
+                case ddsf::AccessMode_Read:
+                case ddsf::AccessMode_Write:
+                case ddsf::AccessMode_ReadWrite:
+                case ddsf::AccessMode_WriteShared:
+                case ddsf::AccessMode_ReadWriteShared:
+                    return access_mode;
+                default:
+                    return ddsf::AccessMode_None;
+            }
+        }
+
+        impl::SessionImpl &GetSessionImpl(Session &session) {
+            return GetReference(session.impl_storage);
+        }
+
+        void DestroySession(Session &session) {
+            GetSessionImpl(session).~SessionImpl();
+            session.has_session = false;
+        }
+
+        void DestroySessionIfNecessary(Session &session) {
+            if (session.has_session) {
+                DestroySession(session);
+            }
+        }
+
+        void CloseSessionIfOpen(Session &session) {
+            if (session.has_session && GetSessionImpl(session).IsOpen()) {
+                DestroySession(session);
+            }
+        }
+
+    }
+
+    Result OpenSession(Session *out, DeviceCode device_code, ddsf::AccessMode access_mode) {
+        /* Validate input. */
+        AMS_ASSERT(out != nullptr);
+        access_mode = SanitizeAccessMode(access_mode);
+
+        /* Find the target device. */
+        impl::IDevice *device = nullptr;
+        R_TRY(impl::FindDevice(std::addressof(device), device_code));
+
+        /* Clean up the session if we have one. */
+        DestroySessionIfNecessary(*out);
+
+        /* Construct the session. */
+        new (std::addressof(GetSessionImpl(*out))) impl::SessionImpl;
+        auto guard = SCOPE_GUARD { DestroySessionIfNecessary(*out); };
+
+        /* Try to open the session. */
+        R_TRY(ddsf::OpenSession(device, std::addressof(GetSessionImpl(*out)), access_mode));
+
+        /* We opened the session! */
+        guard.Cancel();
+        return ResultSuccess();
+    }
+
+    void CloseSession(Session &session) {
+        /* This seems extremely unnecessary/duplicate, but it's what Nintendo does. */
+        CloseSessionIfOpen(session);
+        DestroySession(session);
+    }
+
+}