mirror of
https://github.com/Atmosphere-NX/Atmosphere
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78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
/*
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* Copyright (c) 2018-2019 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 <switch.h>
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#include <stratosphere.hpp>
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#include "i2c_types.hpp"
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#include "i2c_bus_accessor.hpp"
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#include "i2c_driver_session.hpp"
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class I2cResourceManager {
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public:
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static constexpr size_t MaxDriverSessions = 40;
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static constexpr size_t MaxBuses = 6;
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static constexpr size_t PowerBusId = static_cast<size_t>(I2cBus_I2c5);
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static constexpr size_t InvalidSessionId = static_cast<size_t>(-1);
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private:
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HosMutex initialize_mutex;
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HosMutex 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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I2cDriverSession sessions[MaxDriverSessions];
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I2cBusAccessor bus_accessors[MaxBuses];
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HosMutex transaction_mutexes[MaxBuses];
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public:
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I2cResourceManager() {
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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 I2cResourceManager &GetInstance() {
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static I2cResourceManager 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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I2cDriverSession& GetSession(size_t id) {
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return this->sessions[id];
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}
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HosMutex& GetTransactionMutex(I2cBus bus) {
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if (bus >= MaxBuses) {
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std::abort();
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}
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return this->transaction_mutexes[bus];
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}
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void Initialize();
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void Finalize();
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void OpenSession(I2cSessionImpl *out_session, I2cBus bus, u32 slave_address, AddressingMode addressing_mode, SpeedMode speed_mode, u32 max_retries, u64 retry_wait_time);
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void CloseSession(const I2cSessionImpl &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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