1 files changed, 253 insertions, 0 deletions
diff --git a/src/hid_core/hidbus/ringcon.h b/src/hid_core/hidbus/ringcon.h
new file mode 100644
index 000000000..0953e8100
--- /dev/null
+++ b/src/hid_core/hidbus/ringcon.h
@@ -0,0 +1,253 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+#include <span>
+
+#include "common/common_types.h"
+#include "hid_core/hidbus/hidbus_base.h"
+
+namespace Core::HID {
+class EmulatedController;
+} // namespace Core::HID
+
+namespace Service::HID {
+
+class RingController final : public HidbusBase {
+public:
+    explicit RingController(Core::System& system_, KernelHelpers::ServiceContext& service_context_);
+    ~RingController() override;
+
+    void OnInit() override;
+
+    void OnRelease() override;
+
+    // Updates ringcon transfer memory
+    void OnUpdate() override;
+
+    // Returns the device ID of the joycon
+    u8 GetDeviceId() const override;
+
+    // Assigns a command from data
+    bool SetCommand(std::span<const u8> data) override;
+
+    // Returns a reply from a command
+    std::vector<u8> GetReply() const override;
+
+private:
+    // These values are obtained from a real ring controller
+    static constexpr s16 idle_value = 2280;
+    static constexpr s16 idle_deadzone = 120;
+    static constexpr s16 range = 2500;
+
+    // Most missing command names are leftovers from other firmware versions
+    enum class RingConCommands : u32 {
+        GetFirmwareVersion = 0x00020000,
+        ReadId = 0x00020100,
+        JoyPolling = 0x00020101,
+        Unknown1 = 0x00020104,
+        c20105 = 0x00020105,
+        Unknown2 = 0x00020204,
+        Unknown3 = 0x00020304,
+        Unknown4 = 0x00020404,
+        ReadUnkCal = 0x00020504,
+        ReadFactoryCal = 0x00020A04,
+        Unknown5 = 0x00021104,
+        Unknown6 = 0x00021204,
+        Unknown7 = 0x00021304,
+        ReadUserCal = 0x00021A04,
+        ReadRepCount = 0x00023104,
+        ReadTotalPushCount = 0x00023204,
+        ResetRepCount = 0x04013104,
+        Unknown8 = 0x04011104,
+        Unknown9 = 0x04011204,
+        Unknown10 = 0x04011304,
+        SaveCalData = 0x10011A04,
+        Error = 0xFFFFFFFF,
+    };
+
+    enum class DataValid : u32 {
+        Valid,
+        BadCRC,
+        Cal,
+    };
+
+    struct FirmwareVersion {
+        u8 sub;
+        u8 main;
+    };
+    static_assert(sizeof(FirmwareVersion) == 0x2, "FirmwareVersion is an invalid size");
+
+    struct FactoryCalibration {
+        s32_le os_max;
+        s32_le hk_max;
+        s32_le zero_min;
+        s32_le zero_max;
+    };
+    static_assert(sizeof(FactoryCalibration) == 0x10, "FactoryCalibration is an invalid size");
+
+    struct CalibrationValue {
+        s16 value;
+        u16 crc;
+    };
+    static_assert(sizeof(CalibrationValue) == 0x4, "CalibrationValue is an invalid size");
+
+    struct UserCalibration {
+        CalibrationValue os_max;
+        CalibrationValue hk_max;
+        CalibrationValue zero;
+    };
+    static_assert(sizeof(UserCalibration) == 0xC, "UserCalibration is an invalid size");
+
+    struct SaveCalData {
+        RingConCommands command;
+        UserCalibration calibration;
+        INSERT_PADDING_BYTES_NOINIT(4);
+    };
+    static_assert(sizeof(SaveCalData) == 0x14, "SaveCalData is an invalid size");
+    static_assert(std::is_trivially_copyable_v<SaveCalData>,
+                  "SaveCalData must be trivially copyable");
+
+    struct FirmwareVersionReply {
+        DataValid status;
+        FirmwareVersion firmware;
+        INSERT_PADDING_BYTES(0x2);
+    };
+    static_assert(sizeof(FirmwareVersionReply) == 0x8, "FirmwareVersionReply is an invalid size");
+
+    struct Cmd020105Reply {
+        DataValid status;
+        u8 data;
+        INSERT_PADDING_BYTES(0x3);
+    };
+    static_assert(sizeof(Cmd020105Reply) == 0x8, "Cmd020105Reply is an invalid size");
+
+    struct StatusReply {
+        DataValid status;
+    };
+    static_assert(sizeof(StatusReply) == 0x4, "StatusReply is an invalid size");
+
+    struct GetThreeByteReply {
+        DataValid status;
+        std::array<u8, 3> data;
+        u8 crc;
+    };
+    static_assert(sizeof(GetThreeByteReply) == 0x8, "GetThreeByteReply is an invalid size");
+
+    struct ReadUnkCalReply {
+        DataValid status;
+        u16 data;
+        INSERT_PADDING_BYTES(0x2);
+    };
+    static_assert(sizeof(ReadUnkCalReply) == 0x8, "ReadUnkCalReply is an invalid size");
+
+    struct ReadFactoryCalReply {
+        DataValid status;
+        FactoryCalibration calibration;
+    };
+    static_assert(sizeof(ReadFactoryCalReply) == 0x14, "ReadFactoryCalReply is an invalid size");
+
+    struct ReadUserCalReply {
+        DataValid status;
+        UserCalibration calibration;
+        INSERT_PADDING_BYTES(0x4);
+    };
+    static_assert(sizeof(ReadUserCalReply) == 0x14, "ReadUserCalReply is an invalid size");
+
+    struct ReadIdReply {
+        DataValid status;
+        u16 id_l_x0;
+        u16 id_l_x0_2;
+        u16 id_l_x4;
+        u16 id_h_x0;
+        u16 id_h_x0_2;
+        u16 id_h_x4;
+    };
+    static_assert(sizeof(ReadIdReply) == 0x10, "ReadIdReply is an invalid size");
+
+    struct ErrorReply {
+        DataValid status;
+        INSERT_PADDING_BYTES(0x3);
+    };
+    static_assert(sizeof(ErrorReply) == 0x8, "ErrorReply is an invalid size");
+
+    struct RingConData {
+        DataValid status;
+        s16_le data;
+        INSERT_PADDING_BYTES(0x2);
+    };
+    static_assert(sizeof(RingConData) == 0x8, "RingConData is an invalid size");
+
+    // Returns RingConData struct with pressure sensor values
+    RingConData GetSensorValue() const;
+
+    // Returns 8 byte reply with firmware version
+    std::vector<u8> GetFirmwareVersionReply() const;
+
+    // Returns 16 byte reply with ID values
+    std::vector<u8> GetReadIdReply() const;
+
+    // (STUBBED) Returns 8 byte reply
+    std::vector<u8> GetC020105Reply() const;
+
+    // (STUBBED) Returns 8 byte empty reply
+    std::vector<u8> GetReadUnkCalReply() const;
+
+    // Returns 20 byte reply with factory calibration values
+    std::vector<u8> GetReadFactoryCalReply() const;
+
+    // Returns 20 byte reply with user calibration values
+    std::vector<u8> GetReadUserCalReply() const;
+
+    // Returns 8 byte reply
+    std::vector<u8> GetReadRepCountReply() const;
+
+    // Returns 8 byte reply
+    std::vector<u8> GetReadTotalPushCountReply() const;
+
+    // Returns 8 byte reply
+    std::vector<u8> GetResetRepCountReply() const;
+
+    // Returns 4 byte save data reply
+    std::vector<u8> GetSaveDataReply() const;
+
+    // Returns 8 byte error reply
+    std::vector<u8> GetErrorReply() const;
+
+    // Returns 8 bit redundancy check from provided data
+    u8 GetCrcValue(const std::vector<u8>& data) const;
+
+    // Converts structs to an u8 vector equivalent
+    template <typename T>
+    std::vector<u8> GetDataVector(const T& reply) const;
+
+    RingConCommands command{RingConCommands::Error};
+
+    // These counters are used in multitasking mode while the switch is sleeping
+    // Total steps taken
+    u8 total_rep_count = 0;
+    // Total times the ring was pushed
+    u8 total_push_count = 0;
+
+    const u8 device_id = 0x20;
+    const FirmwareVersion version = {
+        .sub = 0x0,
+        .main = 0x2c,
+    };
+    const FactoryCalibration factory_calibration = {
+        .os_max = idle_value + range + idle_deadzone,
+        .hk_max = idle_value - range - idle_deadzone,
+        .zero_min = idle_value - idle_deadzone,
+        .zero_max = idle_value + idle_deadzone,
+    };
+    UserCalibration user_calibration = {
+        .os_max = {.value = range, .crc = 228},
+        .hk_max = {.value = -range, .crc = 239},
+        .zero = {.value = idle_value, .crc = 225},
+    };
+
+    Core::HID::EmulatedController* input;
+};
+} // namespace Service::HID