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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
// Based on dkms-hid-nintendo implementation, CTCaer joycon toolkit and dekuNukem reverse
// engineering https://github.com/nicman23/dkms-hid-nintendo/blob/master/src/hid-nintendo.c
// https://github.com/CTCaer/jc_toolkit
// https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering
#pragma once
#include <memory>
#include <span>
#include <vector>
#include "common/common_types.h"
#include "input_common/helpers/joycon_protocol/joycon_types.h"
namespace InputCommon::Joycon {
/// Joycon driver functions that handle low level communication
class JoyconCommonProtocol {
public:
explicit JoyconCommonProtocol(std::shared_ptr<JoyconHandle> hidapi_handle_);
/**
* Sets handle to blocking. In blocking mode, SDL_hid_read() will wait (block) until there is
* data to read before returning.
*/
void SetBlocking();
/**
* Sets handle to non blocking. In non-blocking mode calls to SDL_hid_read() will return
* immediately with a value of 0 if there is no data to be read
*/
void SetNonBlocking();
/**
* Sends a request to obtain the joycon type from device
* @returns controller type of the joycon
*/
DriverResult GetDeviceType(ControllerType& controller_type);
/**
* Verifies and sets the joycon_handle if device is valid
* @param device info from the driver
* @returns success if the device is valid
*/
DriverResult CheckDeviceAccess(SDL_hid_device_info* device);
/**
* Sends a request to set the polling mode of the joycon
* @param report_mode polling mode to be set
*/
DriverResult SetReportMode(Joycon::ReportMode report_mode);
/**
* Sends data to the joycon device
* @param buffer data to be send
*/
DriverResult SendData(std::span<const u8> buffer);
/**
* Waits for incoming data of the joycon device that matchs the subcommand
* @param sub_command type of data to be returned
* @returns a buffer containing the responce
*/
DriverResult GetSubCommandResponse(SubCommand sub_command, std::vector<u8>& output);
/**
* Sends a sub command to the device and waits for it's reply
* @param sc sub command to be send
* @param buffer data to be send
* @returns output buffer containing the responce
*/
DriverResult SendSubCommand(SubCommand sc, std::span<const u8> buffer, std::vector<u8>& output);
/**
* Sends a sub command to the device and waits for it's reply and ignores the output
* @param sc sub command to be send
* @param buffer data to be send
*/
DriverResult SendSubCommand(SubCommand sc, std::span<const u8> buffer);
/**
* Sends a mcu command to the device
* @param sc sub command to be send
* @param buffer data to be send
*/
DriverResult SendMCUCommand(SubCommand sc, std::span<const u8> buffer);
/**
* Sends vibration data to the joycon
* @param buffer data to be send
*/
DriverResult SendVibrationReport(std::span<const u8> buffer);
/**
* Reads the SPI memory stored on the joycon
* @param Initial address location
* @param size in bytes to be read
* @returns output buffer containing the responce
*/
DriverResult ReadSPI(SpiAddress addr, u8 size, std::vector<u8>& output);
template <typename Output>
requires(std::is_trivially_copyable_v<Output>)
DriverResult ReadSPI(SpiAddress addr, Output& output) {
std::vector<u8> buffer;
output = {};
const auto result = ReadSPI(addr, sizeof(Output), buffer);
if (result != DriverResult::Success) {
return result;
}
if (buffer.size() != sizeof(Output)) {
return DriverResult::WrongReply;
}
std::memcpy(&output, buffer.data(), sizeof(Output));
return DriverResult::Success;
}
/**
* Enables MCU chip on the joycon
* @param enable if true the chip will be enabled
*/
DriverResult EnableMCU(bool enable);
/**
* Configures the MCU to the correspoinding mode
* @param MCUConfig configuration
*/
DriverResult ConfigureMCU(const MCUConfig& config);
/**
* Waits until there's MCU data available. On timeout returns error
* @param report mode of the expected reply
* @returns a buffer containing the responce
*/
DriverResult GetMCUDataResponse(ReportMode report_mode_, std::vector<u8>& output);
/**
* Sends data to the MCU chip and waits for it's reply
* @param report mode of the expected reply
* @param sub command to be send
* @param buffer data to be send
* @returns output buffer containing the responce
*/
DriverResult SendMCUData(ReportMode report_mode, SubCommand sc, std::span<const u8> buffer,
std::vector<u8>& output);
/**
* Wait's until the MCU chip is on the specified mode
* @param report mode of the expected reply
* @param MCUMode configuration
*/
DriverResult WaitSetMCUMode(ReportMode report_mode, MCUMode mode);
/**
* Calculates the checksum from the MCU data
* @param buffer containing the data to be send
* @param size of the buffer in bytes
* @returns byte with the correct checksum
*/
u8 CalculateMCU_CRC8(u8* buffer, u8 size) const;
private:
/**
* Increments and returns the packet counter of the handle
* @param joycon_handle device to send the data
* @returns packet counter value
*/
u8 GetCounter();
std::shared_ptr<JoyconHandle> hidapi_handle;
};
class ScopedSetBlocking {
public:
explicit ScopedSetBlocking(JoyconCommonProtocol* self) : m_self{self} {
m_self->SetBlocking();
}
~ScopedSetBlocking() {
m_self->SetNonBlocking();
}
private:
JoyconCommonProtocol* m_self{};
};
} // namespace InputCommon::Joycon
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