From 6aa6301acdf1c29b80ebfc7fca2aac326400760f Mon Sep 17 00:00:00 2001
From: Narr the Reg <juangerman-13@hotmail.com>
Date: Tue, 20 Dec 2022 13:54:17 -0600
Subject: input_common: Add joycon low level functions
---
.../helpers/joycon_protocol/common_protocol.h | 146 +++++++++++++++++++++
1 file changed, 146 insertions(+)
create mode 100644 src/input_common/helpers/joycon_protocol/common_protocol.h
(limited to 'src/input_common/helpers/joycon_protocol/common_protocol.h')
diff --git a/src/input_common/helpers/joycon_protocol/common_protocol.h b/src/input_common/helpers/joycon_protocol/common_protocol.h
new file mode 100644
index 0000000000..a65e4aa76a
--- /dev/null
+++ b/src/input_common/helpers/joycon_protocol/common_protocol.h
@@ -0,0 +1,146 @@
+// 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 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(CalAddr addr, u8 size, std::vector<u8>& output);
+
+ /**
+ * 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;
+};
+
+} // namespace InputCommon::Joycon
--
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