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

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/*
* 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 <stratosphere.hpp>
#include "powctl_device_management.hpp"
namespace ams::powctl::impl {
namespace {
constinit os::ThreadType g_interrupt_thread;
constexpr inline size_t InterruptThreadStackSize = os::MemoryPageSize;
alignas(os::MemoryPageSize) u8 g_interrupt_thread_stack[InterruptThreadStackSize];
IPowerControlDriver::List &GetDriverList() {
AMS_FUNCTION_LOCAL_STATIC_CONSTINIT(IPowerControlDriver::List, s_driver_list);
return s_driver_list;
}
ddsf::EventHandlerManager &GetInterruptHandlerManager() {
AMS_FUNCTION_LOCAL_STATIC(ddsf::EventHandlerManager, s_interrupt_handler_manager);
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return s_interrupt_handler_manager;
}
ddsf::DeviceCodeEntryManager &GetDeviceCodeEntryManager() {
class DeviceCodeEntryManagerWithUnitHeap {
private:
u8 m_heap_memory[2_KB];
sf::UnitHeapMemoryResource m_memory_resource;
util::TypedStorage<ddsf::DeviceCodeEntryManager> m_manager;
public:
DeviceCodeEntryManagerWithUnitHeap() {
/* Initialize the memory resource. */
m_memory_resource.Attach(lmem::CreateUnitHeap(m_heap_memory, sizeof(m_heap_memory), sizeof(ddsf::DeviceCodeEntryHolder), lmem::CreateOption_ThreadSafe));
/* Construct the entry manager. */
util::ConstructAt(m_manager, std::addressof(m_memory_resource));
}
ALWAYS_INLINE operator ddsf::DeviceCodeEntryManager &() {
return util::GetReference(m_manager);
}
};
AMS_FUNCTION_LOCAL_STATIC(DeviceCodeEntryManagerWithUnitHeap, s_device_code_entry_manager_holder);
return s_device_code_entry_manager_holder;
}
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));
/* Reset all device code entries. */
GetDeviceCodeEntryManager().Reset();
/* Finalize all registered drivers. */
for (auto &driver : GetDriverList()) {
driver.SafeCastTo<IPowerControlDriver>().FinalizeDriver();
}
/* Finalize the interrupt handler manager. */
GetInterruptHandlerManager().Finalize();
}
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();
}
}