mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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83 lines
3.0 KiB
C++
83 lines
3.0 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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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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#pragma once
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#include "../i2c_api.hpp"
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#include "i2c_driver_types.hpp"
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#include "i2c_bus_accessor.hpp"
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#include "i2c_session.hpp"
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namespace ams::i2c::driver::impl {
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class ResourceManager {
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public:
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static constexpr size_t MaxDriverSessions = 40;
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static constexpr size_t PowerBusId = ConvertToIndex(Bus::I2C5);
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static constexpr size_t InvalidSessionId = static_cast<size_t>(-1);
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private:
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os::Mutex initialize_mutex;
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os::Mutex session_open_mutex;
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size_t ref_cnt = 0;
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bool suspended = false;
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bool power_bus_suspended = false;
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Session sessions[MaxDriverSessions];
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BusAccessor bus_accessors[ConvertToIndex(Bus::Count)];
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TYPED_STORAGE(os::Mutex) transaction_mutexes[ConvertToIndex(Bus::Count)];
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public:
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ResourceManager() : initialize_mutex(false), session_open_mutex(false) {
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for (size_t i = 0; i < util::size(this->transaction_mutexes); i++) {
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new (GetPointer(this->transaction_mutexes[i])) os::Mutex(false);
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}
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}
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~ResourceManager() {
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for (size_t i = 0; i < util::size(this->transaction_mutexes); i++) {
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GetReference(this->transaction_mutexes[i]).~Mutex();
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}
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}
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private:
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size_t GetFreeSessionId() const;
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public:
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/* N uses a singleton here, we'll oblige. */
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static ResourceManager &GetInstance() {
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static ResourceManager s_instance;
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return s_instance;
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}
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bool IsInitialized() const {
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return this->ref_cnt > 0;
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}
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Session& GetSession(size_t id) {
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return this->sessions[id];
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}
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os::Mutex& GetTransactionMutex(Bus bus) {
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return GetReference(this->transaction_mutexes[ConvertToIndex(bus)]);
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}
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void Initialize();
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void Finalize();
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void OpenSession(driver::Session *out_session, Bus bus, u32 slave_address, AddressingMode addressing_mode, SpeedMode speed_mode, u32 max_retries, u64 retry_wait_time);
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void CloseSession(const driver::Session &session);
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void SuspendBuses();
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void ResumeBuses();
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void SuspendPowerBus();
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void ResumePowerBus();
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};
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}
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