mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-09-20 07:08:59 +00:00
83 lines
2.9 KiB
C++
83 lines
2.9 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_registers.hpp"
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class I2cBusAccessor {
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private:
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enum TransferMode {
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TransferMode_Send = 0,
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TransferMode_Receive = 1,
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};
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static constexpr u64 InterruptTimeout = 100'000'000ul;
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private:
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Event interrupt_event;
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HosMutex open_mutex;
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HosMutex register_mutex;
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I2cRegisters *i2c_registers = nullptr;
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ClkRstRegisters clkrst_registers;
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SpeedMode speed_mode = SpeedMode_Fast;
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size_t open_sessions = 0;
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I2cBus bus = I2cBus_I2c1;
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PcvModule pcv_module = PcvModule_I2C1;
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bool suspended = false;
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public:
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I2cBusAccessor() {
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/* ... */
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}
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private:
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inline void ClearInterruptMask() const {
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WriteRegister(&i2c_registers->I2C_INTERRUPT_MASK_REGISTER_0, 0);
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ReadRegister(&i2c_registers->I2C_INTERRUPT_MASK_REGISTER_0);
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}
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void SetBus(I2cBus bus);
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void CreateInterruptEvent(I2cBus bus);
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void SetClock(SpeedMode speed_mode);
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void ResetController() const;
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void ClearBus() const;
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void DisableClock();
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void SetPacketMode();
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Result FlushFifos();
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Result GetTransactionResult() const;
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void HandleTransactionResult(Result result);
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Result GetAndHandleTransactionResult();
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void WriteTransferHeader(TransferMode transfer_mode, I2cTransactionOption option, AddressingMode addressing_mode, u32 slave_address, size_t num_bytes);
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public:
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void Open(I2cBus bus, SpeedMode speed_mode);
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void Close();
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void Suspend();
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void Resume();
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void DoInitialConfig();
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size_t GetOpenSessions() const;
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bool GetBusy() const;
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void OnStartTransaction() const;
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Result StartTransaction(DriverCommand command, AddressingMode addressing_mode, u32 slave_address);
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Result Send(const u8 *data, size_t num_bytes, I2cTransactionOption option, AddressingMode addressing_mode, u32 slave_address);
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Result Receive(u8 *out_data, size_t num_bytes, I2cTransactionOption option, AddressingMode addressing_mode, u32 slave_address);
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void OnStopTransaction() const;
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};
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