hidbus: Implement hidbus and ringcon

src/core/CMakeLists.txt

@@ -434,6 +434,8 @@ add_library(core STATIC
     hle/service/grc/grc.h
     hle/service/hid/hid.cpp
     hle/service/hid/hid.h
+    hle/service/hid/hidbus.cpp
+    hle/service/hid/hidbus.h
     hle/service/hid/irs.cpp
     hle/service/hid/irs.h
     hle/service/hid/ring_lifo.h
@@ -460,6 +462,14 @@ add_library(core STATIC
     hle/service/hid/controllers/touchscreen.h
     hle/service/hid/controllers/xpad.cpp
     hle/service/hid/controllers/xpad.h
+    hle/service/hid/hidbus/hidbus_base.cpp
+    hle/service/hid/hidbus/hidbus_base.h
+    hle/service/hid/hidbus/ringcon.cpp
+    hle/service/hid/hidbus/ringcon.h
+    hle/service/hid/hidbus/starlink.cpp
+    hle/service/hid/hidbus/starlink.h
+    hle/service/hid/hidbus/stubbed.cpp
+    hle/service/hid/hidbus/stubbed.h
     hle/service/jit/jit_context.cpp
     hle/service/jit/jit_context.h
     hle/service/jit/jit.cpp

src/core/hle/kernel/kernel.cpp

@@ -140,6 +140,7 @@ struct KernelCore::Impl {
         CleanupObject(font_shared_mem);
         CleanupObject(irs_shared_mem);
         CleanupObject(time_shared_mem);
+        CleanupObject(hidbus_shared_mem);
         CleanupObject(system_resource_limit);
 
         for (u32 core_id = 0; core_id < Core::Hardware::NUM_CPU_CORES; core_id++) {
@@ -622,16 +623,20 @@ struct KernelCore::Impl {
         constexpr std::size_t font_size{0x1100000};
         constexpr std::size_t irs_size{0x8000};
         constexpr std::size_t time_size{0x1000};
+        constexpr std::size_t hidbus_size{0x1000};
 
         const PAddr hid_phys_addr{system_pool.GetAddress()};
         const PAddr font_phys_addr{system_pool.GetAddress() + hid_size};
         const PAddr irs_phys_addr{system_pool.GetAddress() + hid_size + font_size};
         const PAddr time_phys_addr{system_pool.GetAddress() + hid_size + font_size + irs_size};
+        const PAddr hidbus_phys_addr{system_pool.GetAddress() + hid_size + font_size + irs_size +
+                                     time_size};
 
         hid_shared_mem = KSharedMemory::Create(system.Kernel());
         font_shared_mem = KSharedMemory::Create(system.Kernel());
         irs_shared_mem = KSharedMemory::Create(system.Kernel());
         time_shared_mem = KSharedMemory::Create(system.Kernel());
+        hidbus_shared_mem = KSharedMemory::Create(system.Kernel());
 
         hid_shared_mem->Initialize(system.DeviceMemory(), nullptr,
                                    {hid_phys_addr, hid_size / PageSize},
@@ -649,6 +654,10 @@ struct KernelCore::Impl {
                                     {time_phys_addr, time_size / PageSize},
                                     Svc::MemoryPermission::None, Svc::MemoryPermission::Read,
                                     time_phys_addr, time_size, "Time:SharedMemory");
+        hidbus_shared_mem->Initialize(system.DeviceMemory(), nullptr,
+                                      {hidbus_phys_addr, hidbus_size / PageSize},
+                                      Svc::MemoryPermission::None, Svc::MemoryPermission::Read,
+                                      hidbus_phys_addr, hidbus_size, "HidBus:SharedMemory");
     }
 
     KClientPort* CreateNamedServicePort(std::string name) {
@@ -748,6 +757,7 @@ struct KernelCore::Impl {
     Kernel::KSharedMemory* font_shared_mem{};
     Kernel::KSharedMemory* irs_shared_mem{};
     Kernel::KSharedMemory* time_shared_mem{};
+    Kernel::KSharedMemory* hidbus_shared_mem{};
 
     // Memory layout
     std::unique_ptr<KMemoryLayout> memory_layout;
@@ -1047,6 +1057,14 @@ const Kernel::KSharedMemory& KernelCore::GetTimeSharedMem() const {
     return *impl->time_shared_mem;
 }
 
+Kernel::KSharedMemory& KernelCore::GetHidBusSharedMem() {
+    return *impl->hidbus_shared_mem;
+}
+
+const Kernel::KSharedMemory& KernelCore::GetHidBusSharedMem() const {
+    return *impl->hidbus_shared_mem;
+}
+
 void KernelCore::Suspend(bool in_suspention) {
     const bool should_suspend = exception_exited || in_suspention;
     {

src/core/hle/kernel/kernel.h

@@ -264,6 +264,12 @@ public:
     /// Gets the shared memory object for Time services.
     const Kernel::KSharedMemory& GetTimeSharedMem() const;
 
+    /// Gets the shared memory object for HIDBus services.
+    Kernel::KSharedMemory& GetHidBusSharedMem();
+
+    /// Gets the shared memory object for HIDBus services.
+    const Kernel::KSharedMemory& GetHidBusSharedMem() const;
+
     /// Suspend/unsuspend the OS.
     void Suspend(bool in_suspention);
 

src/core/hle/service/hid/hid.cpp

@@ -16,6 +16,7 @@
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/service/hid/errors.h"
 #include "core/hle/service/hid/hid.h"
+#include "core/hle/service/hid/hidbus.h"
 #include "core/hle/service/hid/irs.h"
 #include "core/hle/service/hid/xcd.h"
 #include "core/memory.h"
@@ -2128,32 +2129,6 @@ public:
     }
 };
 
-class HidBus final : public ServiceFramework<HidBus> {
-public:
-    explicit HidBus(Core::System& system_) : ServiceFramework{system_, "hidbus"} {
-        // clang-format off
-        static const FunctionInfo functions[] = {
-            {1, nullptr, "GetBusHandle"},
-            {2, nullptr, "IsExternalDeviceConnected"},
-            {3, nullptr, "Initialize"},
-            {4, nullptr, "Finalize"},
-            {5, nullptr, "EnableExternalDevice"},
-            {6, nullptr, "GetExternalDeviceId"},
-            {7, nullptr, "SendCommandAsync"},
-            {8, nullptr, "GetSendCommandAsynceResult"},
-            {9, nullptr, "SetEventForSendCommandAsycResult"},
-            {10, nullptr, "GetSharedMemoryHandle"},
-            {11, nullptr, "EnableJoyPollingReceiveMode"},
-            {12, nullptr, "DisableJoyPollingReceiveMode"},
-            {13, nullptr, "GetPollingData"},
-            {14, nullptr, "SetStatusManagerType"},
-        };
-        // clang-format on
-
-        RegisterHandlers(functions);
-    }
-};
-
 void InstallInterfaces(SM::ServiceManager& service_manager, Core::System& system) {
     std::make_shared<Hid>(system)->InstallAsService(service_manager);
     std::make_shared<HidBus>(system)->InstallAsService(service_manager);

src/core/hle/service/hid/hidbus.cpp

@@ -0,0 +1,529 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/logging/log.h"
+#include "core/core.h"
+#include "core/core_timing.h"
+#include "core/core_timing_util.h"
+#include "core/hid/hid_types.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/k_event.h"
+#include "core/hle/kernel/k_readable_event.h"
+#include "core/hle/kernel/k_shared_memory.h"
+#include "core/hle/kernel/k_transfer_memory.h"
+#include "core/hle/service/hid/hidbus.h"
+#include "core/hle/service/hid/hidbus/ringcon.h"
+#include "core/hle/service/hid/hidbus/starlink.h"
+#include "core/hle/service/hid/hidbus/stubbed.h"
+#include "core/hle/service/service.h"
+#include "core/memory.h"
+
+namespace Service::HID {
+// (15ms, 66Hz)
+constexpr auto hidbus_update_ns = std::chrono::nanoseconds{15 * 1000 * 1000};
+
+HidBus::HidBus(Core::System& system_)
+    : ServiceFramework{system_, "hidbus"}, service_context{system_, service_name} {
+
+    // clang-format off
+    static const FunctionInfo functions[] = {
+            {1, &HidBus::GetBusHandle, "GetBusHandle"},
+            {2, &HidBus::IsExternalDeviceConnected, "IsExternalDeviceConnected"},
+            {3, &HidBus::Initialize, "Initialize"},
+            {4, &HidBus::Finalize, "Finalize"},
+            {5, &HidBus::EnableExternalDevice, "EnableExternalDevice"},
+            {6, &HidBus::GetExternalDeviceId, "GetExternalDeviceId"},
+            {7, &HidBus::SendCommandAsync, "SendCommandAsync"},
+            {8, &HidBus::GetSendCommandAsynceResult, "GetSendCommandAsynceResult"},
+            {9, &HidBus::SetEventForSendCommandAsycResult, "SetEventForSendCommandAsycResult"},
+            {10, &HidBus::GetSharedMemoryHandle, "GetSharedMemoryHandle"},
+            {11, &HidBus::EnableJoyPollingReceiveMode, "EnableJoyPollingReceiveMode"},
+            {12, &HidBus::DisableJoyPollingReceiveMode, "DisableJoyPollingReceiveMode"},
+            {13, nullptr, "GetPollingData"},
+            {14, &HidBus::SetStatusManagerType, "SetStatusManagerType"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+
+    // Register update callbacks
+    hidbus_update_event = Core::Timing::CreateEvent(
+        "Hidbus::UpdateCallback",
+        [this](std::uintptr_t user_data, std::chrono::nanoseconds ns_late) {
+            const auto guard = LockService();
+            UpdateHidbus(user_data, ns_late);
+        });
+
+    system_.CoreTiming().ScheduleEvent(hidbus_update_ns, hidbus_update_event);
+}
+
+HidBus::~HidBus() {
+    system.CoreTiming().UnscheduleEvent(hidbus_update_event, 0);
+}
+
+void HidBus::UpdateHidbus(std::uintptr_t user_data, std::chrono::nanoseconds ns_late) {
+    auto& core_timing = system.CoreTiming();
+
+    if (is_hidbus_enabled) {
+        for (std::size_t i = 0; i < devices.size(); ++i) {
+            if (!devices[i].is_device_initializated) {
+                continue;
+            }
+            auto& device = devices[i].device;
+            device->OnUpdate();
+            auto& cur_entry = hidbus_status.entries[devices[i].handle.internal_index];
+            cur_entry.is_polling_mode = device->IsPollingMode();
+            cur_entry.polling_mode = device->GetPollingMode();
+            cur_entry.is_enabled = device->IsEnabled();
+
+            u8* shared_memory = system.Kernel().GetHidBusSharedMem().GetPointer();
+            std::memcpy(shared_memory + (i * sizeof(HidbusStatusManagerEntry)), &hidbus_status,
+                        sizeof(HidbusStatusManagerEntry));
+        }
+    }
+
+    // If ns_late is higher than the update rate ignore the delay
+    if (ns_late > hidbus_update_ns) {
+        ns_late = {};
+    }
+
+    core_timing.ScheduleEvent(hidbus_update_ns - ns_late, hidbus_update_event);
+}
+
+std::optional<std::size_t> HidBus::GetDeviceIndexFromHandle(BusHandle handle) const {
+    for (std::size_t i = 0; i < devices.size(); ++i) {
+        const auto& device_handle = devices[i].handle;
+        if (handle.abstracted_pad_id == device_handle.abstracted_pad_id &&
+            handle.internal_index == device_handle.internal_index &&
+            handle.player_number == device_handle.player_number &&
+            handle.bus_type == device_handle.bus_type &&
+            handle.is_valid == device_handle.is_valid) {
+            return i;
+        }
+    }
+    return std::nullopt;
+}
+
+void HidBus::GetBusHandle(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    struct Parameters {
+        Core::HID::NpadIdType npad_id;
+        INSERT_PADDING_WORDS_NOINIT(1);
+        BusType bus_type;
+        u64 applet_resource_user_id;
+    };
+    static_assert(sizeof(Parameters) == 0x18, "Parameters has incorrect size.");
+
+    const auto parameters{rp.PopRaw<Parameters>()};
+
+    LOG_INFO(Service_HID, "called, npad_id={}, bus_type={}, applet_resource_user_id={}",
+             parameters.npad_id, parameters.bus_type, parameters.applet_resource_user_id);
+
+    bool is_handle_found = 0;
+    std::size_t handle_index = 0;
+
+    for (std::size_t i = 0; i < devices.size(); i++) {
+        const auto& handle = devices[i].handle;
+        if (!handle.is_valid) {
+            continue;
+        }
+        if (static_cast<Core::HID::NpadIdType>(handle.player_number) == parameters.npad_id &&
+            handle.bus_type == parameters.bus_type) {
+            is_handle_found = true;
+            handle_index = i;
+            break;
+        }
+    }
+
+    // Handle not found. Create a new one
+    if (!is_handle_found) {
+        for (std::size_t i = 0; i < devices.size(); i++) {
+            if (devices[i].handle.is_valid) {
+                continue;
+            }
+            devices[i].handle = {
+                .abstracted_pad_id = static_cast<u8>(i),
+                .internal_index = static_cast<u8>(i),
+                .player_number = static_cast<u8>(parameters.npad_id),
+                .bus_type = parameters.bus_type,
+                .is_valid = true,
+            };
+            handle_index = i;
+            break;
+        }
+    }
+
+    struct OutData {
+        bool is_valid;
+        INSERT_PADDING_BYTES(7);
+        BusHandle handle;
+    };
+    static_assert(sizeof(OutData) == 0x10, "OutData has incorrect size.");
+
+    const OutData out_data{
+        .is_valid = true,
+        .handle = devices[handle_index].handle,
+    };
+
+    IPC::ResponseBuilder rb{ctx, 6};
+    rb.Push(ResultSuccess);
+    rb.PushRaw(out_data);
+}
+
+void HidBus::IsExternalDeviceConnected(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto bus_handle_{rp.PopRaw<BusHandle>()};
+
+    LOG_INFO(Service_HID,
+             "Called, abstracted_pad_id={}, bus_type={}, internal_index={}, "
+             "player_number={}, is_valid={}",
+             bus_handle_.abstracted_pad_id, bus_handle_.bus_type, bus_handle_.internal_index,
+             bus_handle_.player_number, bus_handle_.is_valid);
+
+    const auto device_index = GetDeviceIndexFromHandle(bus_handle_);
+
+    if (device_index) {
+        const auto& device = devices[device_index.value()].device;
+        const bool is_attached = device->IsDeviceActivated();
+
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(ResultSuccess);
+        rb.Push(is_attached);
+    }
+
+    LOG_ERROR(Service_HID, "Invalid handle");
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultUnknown);
+    return;
+}
+
+void HidBus::Initialize(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto bus_handle_{rp.PopRaw<BusHandle>()};
+    const auto applet_resource_user_id{rp.Pop<u64>()};
+
+    LOG_INFO(Service_HID,
+             "called, abstracted_pad_id={} bus_type={} internal_index={} "
+             "player_number={} is_valid={}, applet_resource_user_id={}",
+             bus_handle_.abstracted_pad_id, bus_handle_.bus_type, bus_handle_.internal_index,
+             bus_handle_.player_number, bus_handle_.is_valid, applet_resource_user_id);
+
+    is_hidbus_enabled = true;
+
+    const auto device_index = GetDeviceIndexFromHandle(bus_handle_);
+
+    if (device_index) {
+        const auto entry_index = devices[device_index.value()].handle.internal_index;
+        auto& cur_entry = hidbus_status.entries[entry_index];
+
+        if (bus_handle_.internal_index == 0) {
+            MakeDevice<RingController>(bus_handle_);
+            devices[device_index.value()].is_device_initializated = true;
+            devices[device_index.value()].device->ActivateDevice();
+            cur_entry.is_in_focus = true;
+            cur_entry.is_connected = true;
+            cur_entry.is_connected_result = ResultSuccess;
+            cur_entry.is_enabled = false;
+            cur_entry.is_polling_mode = false;
+        } else {
+            MakeDevice<HidbusStubbed>(bus_handle_);
+            devices[device_index.value()].is_device_initializated = true;
+            cur_entry.is_in_focus = true;
+            cur_entry.is_connected = false;
+            cur_entry.is_connected_result = ResultSuccess;
+            cur_entry.is_enabled = false;
+            cur_entry.is_polling_mode = false;
+        }
+
+        std::memcpy(system.Kernel().GetHidBusSharedMem().GetPointer(), &hidbus_status,
+                    sizeof(hidbus_status));
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(ResultSuccess);
+        return;
+    }
+
+    LOG_ERROR(Service_HID, "Invalid handle");
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultUnknown);
+    return;
+}
+
+void HidBus::Finalize(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto bus_handle_{rp.PopRaw<BusHandle>()};
+    const auto applet_resource_user_id{rp.Pop<u64>()};
+
+    LOG_INFO(Service_HID,
+             "called, abstracted_pad_id={}, bus_type={}, internal_index={}, "
+             "player_number={}, is_valid={}, applet_resource_user_id={}",
+             bus_handle_.abstracted_pad_id, bus_handle_.bus_type, bus_handle_.internal_index,
+             bus_handle_.player_number, bus_handle_.is_valid, applet_resource_user_id);
+
+    const auto device_index = GetDeviceIndexFromHandle(bus_handle_);
+
+    if (device_index) {
+        const auto entry_index = devices[device_index.value()].handle.internal_index;
+        auto& cur_entry = hidbus_status.entries[entry_index];
+        auto& device = devices[device_index.value()].device;
+        devices[device_index.value()].is_device_initializated = false;
+        device->DeactivateDevice();
+
+        cur_entry.is_in_focus = true;
+        cur_entry.is_connected = false;
+        cur_entry.is_connected_result = ResultSuccess;
+        cur_entry.is_enabled = false;
+        cur_entry.is_polling_mode = false;
+        std::memcpy(system.Kernel().GetHidBusSharedMem().GetPointer(), &hidbus_status,
+                    sizeof(hidbus_status));
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(ResultSuccess);
+        return;
+    }
+
+    LOG_ERROR(Service_HID, "Invalid handle");
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultUnknown);
+    return;
+}
+
+void HidBus::EnableExternalDevice(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    struct Parameters {
+        bool enable;
+        INSERT_PADDING_BYTES_NOINIT(7);
+        BusHandle bus_handle;
+        u64 inval;
+        u64 applet_resource_user_id;
+    };
+    static_assert(sizeof(Parameters) == 0x20, "Parameters has incorrect size.");
+
+    const auto parameters{rp.PopRaw<Parameters>()};
+
+    LOG_INFO(Service_HID,
+             "called, enable={}, abstracted_pad_id={}, bus_type={}, internal_index={}, "
+             "player_number={}, is_valid={}, inval={}, applet_resource_user_id{}",
+             parameters.enable, parameters.bus_handle.abstracted_pad_id,
+             parameters.bus_handle.bus_type, parameters.bus_handle.internal_index,
+             parameters.bus_handle.player_number, parameters.bus_handle.is_valid, parameters.inval,
+             parameters.applet_resource_user_id);
+
+    const auto device_index = GetDeviceIndexFromHandle(parameters.bus_handle);
+
+    if (device_index) {
+        auto& device = devices[device_index.value()].device;
+        device->Enable(parameters.enable);
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(ResultSuccess);
+        return;
+    }
+
+    LOG_ERROR(Service_HID, "Invalid handle");
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultUnknown);
+    return;
+}
+
+void HidBus::GetExternalDeviceId(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto bus_handle_{rp.PopRaw<BusHandle>()};
+
+    LOG_INFO(Service_HID,
+             "called, abstracted_pad_id={}, bus_type={}, internal_index={}, player_number={}, "
+             "is_valid={}",
+             bus_handle_.abstracted_pad_id, bus_handle_.bus_type, bus_handle_.internal_index,
+             bus_handle_.player_number, bus_handle_.is_valid);
+
+    const auto device_index = GetDeviceIndexFromHandle(bus_handle_);
+
+    if (device_index) {
+        const auto& device = devices[device_index.value()].device;
+        u32 device_id = device->GetDeviceId();
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(ResultSuccess);
+        rb.Push<u32>(device_id);
+        return;
+    }
+
+    LOG_ERROR(Service_HID, "Invalid handle");
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultUnknown);
+    return;
+}
+
+void HidBus::SendCommandAsync(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto data = ctx.ReadBuffer();
+    const auto bus_handle_{rp.PopRaw<BusHandle>()};
+
+    LOG_DEBUG(Service_HID,
+              "called, data_size={}, abstracted_pad_id={}, bus_type={}, internal_index={}, "
+              "player_number={}, is_valid={}",
+              data.size(), bus_handle_.abstracted_pad_id, bus_handle_.bus_type,
+              bus_handle_.internal_index, bus_handle_.player_number, bus_handle_.is_valid);
+
+    const auto device_index = GetDeviceIndexFromHandle(bus_handle_);
+
+    if (device_index) {
+        auto& device = devices[device_index.value()].device;
+        device->SetCommand(data);
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(ResultSuccess);
+        return;
+    }
+
+    LOG_ERROR(Service_HID, "Invalid handle");
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultUnknown);
+    return;
+};
+
+void HidBus::GetSendCommandAsynceResult(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto bus_handle_{rp.PopRaw<BusHandle>()};
+
+    LOG_DEBUG(Service_HID,
+              "called, abstracted_pad_id={}, bus_type={}, internal_index={}, player_number={}, "
+              "is_valid={}",
+              bus_handle_.abstracted_pad_id, bus_handle_.bus_type, bus_handle_.internal_index,
+              bus_handle_.player_number, bus_handle_.is_valid);
+
+    const auto device_index = GetDeviceIndexFromHandle(bus_handle_);
+
+    if (device_index) {
+        const auto& device = devices[device_index.value()].device;
+        const std::vector<u8> data = device->GetReply();
+        const u64 data_size = ctx.WriteBuffer(data);
+
+        IPC::ResponseBuilder rb{ctx, 4};
+        rb.Push(ResultSuccess);
+        rb.Push<u64>(data_size);
+        return;
+    }
+
+    LOG_ERROR(Service_HID, "Invalid handle");
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultUnknown);
+    return;
+};
+
+void HidBus::SetEventForSendCommandAsycResult(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto bus_handle_{rp.PopRaw<BusHandle>()};
+
+    LOG_INFO(Service_HID,
+             "called, abstracted_pad_id={}, bus_type={}, internal_index={}, player_number={}, "
+             "is_valid={}",
+             bus_handle_.abstracted_pad_id, bus_handle_.bus_type, bus_handle_.internal_index,
+             bus_handle_.player_number, bus_handle_.is_valid);
+
+    const auto device_index = GetDeviceIndexFromHandle(bus_handle_);
+
+    if (device_index) {
+        const auto& device = devices[device_index.value()].device;
+        IPC::ResponseBuilder rb{ctx, 2, 1};
+        rb.Push(ResultSuccess);
+        rb.PushCopyObjects(device->GetSendCommandAsycEvent());
+        return;
+    }
+
+    LOG_ERROR(Service_HID, "Invalid handle");
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultUnknown);
+    return;
+};
+
+void HidBus::GetSharedMemoryHandle(Kernel::HLERequestContext& ctx) {
+    LOG_DEBUG(Service_HID, "called");
+
+    IPC::ResponseBuilder rb{ctx, 2, 1};
+    rb.Push(ResultSuccess);
+    rb.PushCopyObjects(&system.Kernel().GetHidBusSharedMem());
+}
+
+void HidBus::EnableJoyPollingReceiveMode(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto t_mem_size{rp.Pop<u32>()};
+    const auto t_mem_handle{ctx.GetCopyHandle(0)};
+    const auto polling_mode_{rp.PopEnum<JoyPollingMode>()};
+    const auto bus_handle_{rp.PopRaw<BusHandle>()};
+
+    ASSERT_MSG(t_mem_size == 0x1000, "t_mem_size is not 0x1000 bytes");
+
+    auto t_mem =
+        system.CurrentProcess()->GetHandleTable().GetObject<Kernel::KTransferMemory>(t_mem_handle);
+
+    if (t_mem.IsNull()) {
+        LOG_ERROR(Service_HID, "t_mem is a nullptr for handle=0x{:08X}", t_mem_handle);
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(ResultUnknown);
+        return;
+    }
+
+    ASSERT_MSG(t_mem->GetSize() == 0x1000, "t_mem has incorrect size");
+
+    LOG_INFO(Service_HID,
+             "called, t_mem_handle=0x{:08X}, polling_mode={}, abstracted_pad_id={}, bus_type={}, "
+             "internal_index={}, player_number={}, is_valid={}",
+             t_mem_handle, polling_mode_, bus_handle_.abstracted_pad_id, bus_handle_.bus_type,
+             bus_handle_.internal_index, bus_handle_.player_number, bus_handle_.is_valid);
+
+    const auto device_index = GetDeviceIndexFromHandle(bus_handle_);
+
+    if (device_index) {
+        auto& device = devices[device_index.value()].device;
+        device->SetPollingMode(polling_mode_);
+        device->SetTransferMemoryPointer(system.Memory().GetPointer(t_mem->GetSourceAddress()));
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(ResultSuccess);
+        return;
+    }
+
+    LOG_ERROR(Service_HID, "Invalid handle");
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultUnknown);
+    return;
+}
+
+void HidBus::DisableJoyPollingReceiveMode(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto bus_handle_{rp.PopRaw<BusHandle>()};
+
+    LOG_INFO(Service_HID,
+             "called, abstracted_pad_id={}, bus_type={}, internal_index={}, player_number={}, "
+             "is_valid={}",
+             bus_handle_.abstracted_pad_id, bus_handle_.bus_type, bus_handle_.internal_index,
+             bus_handle_.player_number, bus_handle_.is_valid);
+
+    const auto device_index = GetDeviceIndexFromHandle(bus_handle_);
+
+    if (device_index) {
+        auto& device = devices[device_index.value()].device;
+        device->DisablePollingMode();
+
+        IPC::ResponseBuilder rb{ctx, 2};
+        rb.Push(ResultSuccess);
+        return;
+    }
+
+    LOG_ERROR(Service_HID, "Invalid handle");
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultUnknown);
+    return;
+}
+
+void HidBus::SetStatusManagerType(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp{ctx};
+    const auto manager_type{rp.PopEnum<StatusManagerType>()};
+
+    LOG_WARNING(Service_HID, "(STUBBED) called, manager_type={}", manager_type);
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(ResultSuccess);
+};
+} // namespace Service::HID

src/core/hle/service/hid/hidbus.h

@@ -0,0 +1,131 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <functional>
+
+#include "core/hle/service/hid/hidbus/hidbus_base.h"
+#include "core/hle/service/kernel_helpers.h"
+#include "core/hle/service/service.h"
+
+namespace Core::Timing {
+struct EventType;
+} // namespace Core::Timing
+
+namespace Core {
+class System;
+} // namespace Core
+
+namespace Service::HID {
+
+class HidBus final : public ServiceFramework<HidBus> {
+public:
+    explicit HidBus(Core::System& system_);
+    ~HidBus() override;
+
+private:
+    static const std::size_t max_number_of_handles = 0x13;
+
+    enum class HidBusDeviceId : std::size_t {
+        RingController = 0x20,
+        FamicomRight = 0x21,
+        Starlink = 0x28,
+    };
+
+    // This is nn::hidbus::detail::StatusManagerType
+    enum class StatusManagerType : u32 {
+        None,
+        Type16,
+        Type32,
+    };
+
+    // This is nn::hidbus::BusType
+    enum class BusType : u8 {
+        LeftJoyRail,
+        RightJoyRail,
+        InternalBus, // Lark microphone
+
+        MaxBusType,
+    };
+
+    // This is nn::hidbus::BusHandle
+    struct BusHandle {
+        u32 abstracted_pad_id;
+        u8 internal_index;
+        u8 player_number;
+        BusType bus_type;
+        bool is_valid;
+    };
+    static_assert(sizeof(BusHandle) == 0x8, "BusHandle is an invalid size");
+
+    // This is nn::hidbus::JoyPollingReceivedData
+    struct JoyPollingReceivedData {
+        std::array<u8, 0x30> data;
+        u64 out_size;
+        u64 sampling_number;
+    };
+    static_assert(sizeof(JoyPollingReceivedData) == 0x40,
+                  "JoyPollingReceivedData is an invalid size");
+
+    struct HidbusStatusManagerEntry {
+        u8 is_connected{};
+        INSERT_PADDING_BYTES(0x3);
+        ResultCode is_connected_result{0};
+        u8 is_enabled{};
+        u8 is_in_focus{};
+        u8 is_polling_mode{};
+        u8 reserved{};
+        JoyPollingMode polling_mode{};
+        INSERT_PADDING_BYTES(0x70); // Unknown
+    };
+    static_assert(sizeof(HidbusStatusManagerEntry) == 0x80,
+                  "HidbusStatusManagerEntry is an invalid size");
+
+    struct HidbusStatusManager {
+        std::array<HidbusStatusManagerEntry, max_number_of_handles> entries{};
+        INSERT_PADDING_BYTES(0x680); // Unused
+    };
+    static_assert(sizeof(HidbusStatusManager) <= 0x1000, "HidbusStatusManager is an invalid size");
+
+    struct HidbusDevice {
+        bool is_device_initializated{};
+        BusHandle handle{};
+        std::unique_ptr<HidbusBase> device{nullptr};
+    };
+
+    void GetBusHandle(Kernel::HLERequestContext& ctx);
+    void IsExternalDeviceConnected(Kernel::HLERequestContext& ctx);
+    void Initialize(Kernel::HLERequestContext& ctx);
+    void Finalize(Kernel::HLERequestContext& ctx);
+    void EnableExternalDevice(Kernel::HLERequestContext& ctx);
+    void GetExternalDeviceId(Kernel::HLERequestContext& ctx);
+    void SendCommandAsync(Kernel::HLERequestContext& ctx);
+    void GetSendCommandAsynceResult(Kernel::HLERequestContext& ctx);
+    void SetEventForSendCommandAsycResult(Kernel::HLERequestContext& ctx);
+    void GetSharedMemoryHandle(Kernel::HLERequestContext& ctx);
+    void EnableJoyPollingReceiveMode(Kernel::HLERequestContext& ctx);
+    void DisableJoyPollingReceiveMode(Kernel::HLERequestContext& ctx);
+    void SetStatusManagerType(Kernel::HLERequestContext& ctx);
+
+    void UpdateHidbus(std::uintptr_t user_data, std::chrono::nanoseconds ns_late);
+    std::optional<std::size_t> GetDeviceIndexFromHandle(BusHandle handle) const;
+
+    template <typename T>
+    void MakeDevice(BusHandle handle) {
+        const auto device_index = GetDeviceIndexFromHandle(handle);
+        if (device_index) {
+            devices[device_index.value()].device =
+                std::make_unique<T>(system.HIDCore(), service_context);
+        }
+    }
+
+    bool is_hidbus_enabled{false};
+    HidbusStatusManager hidbus_status{};
+    std::array<HidbusDevice, max_number_of_handles> devices{};
+    std::shared_ptr<Core::Timing::EventType> hidbus_update_event;
+    KernelHelpers::ServiceContext service_context;
+};
+
+} // namespace Service::HID

src/core/hle/service/hid/hidbus/hidbus_base.cpp

@@ -0,0 +1,72 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hid/hid_core.h"
+#include "core/hle/kernel/k_event.h"
+#include "core/hle/kernel/k_readable_event.h"
+#include "core/hle/service/hid/hidbus/hidbus_base.h"
+#include "core/hle/service/kernel_helpers.h"
+
+namespace Service::HID {
+
+HidbusBase::HidbusBase(KernelHelpers::ServiceContext& service_context_)
+    : service_context(service_context_) {
+    send_command_asyc_event = service_context.CreateEvent("hidbus:SendCommandAsycEvent");
+}
+HidbusBase::~HidbusBase() = default;
+
+void HidbusBase::ActivateDevice() {
+    if (is_activated) {
+        return;
+    }
+    is_activated = true;
+    OnInit();
+}
+
+void HidbusBase::DeactivateDevice() {
+    if (is_activated) {
+        OnRelease();
+    }
+    is_activated = false;
+}
+
+bool HidbusBase::IsDeviceActivated() const {
+    return is_activated;
+}
+
+void HidbusBase::Enable(bool enable) {
+    device_enabled = enable;
+}
+
+bool HidbusBase::IsEnabled() const {
+    return device_enabled;
+}
+
+bool HidbusBase::IsPollingMode() const {
+    return polling_mode_enabled;
+}
+
+JoyPollingMode HidbusBase::GetPollingMode() const {
+    return polling_mode;
+}
+
+void HidbusBase::SetPollingMode(JoyPollingMode mode) {
+    polling_mode = mode;
+    polling_mode_enabled = true;
+}
+
+void HidbusBase::DisablePollingMode() {
+    polling_mode_enabled = false;
+}
+
+void HidbusBase::SetTransferMemoryPointer(u8* t_mem) {
+    is_transfer_memory_set = true;
+    transfer_memory = t_mem;
+}
+
+Kernel::KReadableEvent& HidbusBase::GetSendCommandAsycEvent() const {
+    return send_command_asyc_event->GetReadableEvent();
+}
+
+} // namespace Service::HID

src/core/hle/service/hid/hidbus/hidbus_base.h

@@ -0,0 +1,178 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include "common/common_types.h"
+#include "core/hle/result.h"
+
+namespace Kernel {
+class KEvent;
+class KReadableEvent;
+} // namespace Kernel
+
+namespace Service::KernelHelpers {
+class ServiceContext;
+}
+
+namespace Service::HID {
+
+// This is nn::hidbus::JoyPollingMode
+enum class JoyPollingMode : u32 {
+    SixAxisSensorDisable,
+    SixAxisSensorEnable,
+    ButtonOnly,
+};
+
+struct DataAccessorHeader {
+    ResultCode result{ResultUnknown};
+    INSERT_PADDING_WORDS(0x1);
+    std::array<u8, 0x18> unused{};
+    u64 latest_entry{};
+    u64 total_entries{};
+};
+static_assert(sizeof(DataAccessorHeader) == 0x30, "DataAccessorHeader is an invalid size");
+
+struct JoyDisableSixAxisPollingData {
+    std::array<u8, 0x26> data;
+    u8 out_size;
+    INSERT_PADDING_BYTES(0x1);
+    u64 sampling_number;
+};
+static_assert(sizeof(JoyDisableSixAxisPollingData) == 0x30,
+              "JoyDisableSixAxisPollingData is an invalid size");
+
+struct JoyEnableSixAxisPollingData {
+    std::array<u8, 0x8> data;
+    u8 out_size;
+    INSERT_PADDING_BYTES(0x7);
+    u64 sampling_number;
+};
+static_assert(sizeof(JoyEnableSixAxisPollingData) == 0x18,
+              "JoyEnableSixAxisPollingData is an invalid size");
+
+struct JoyButtonOnlyPollingData {
+    std::array<u8, 0x2c> data;
+    u8 out_size;
+    INSERT_PADDING_BYTES(0x3);
+    u64 sampling_number;
+};
+static_assert(sizeof(JoyButtonOnlyPollingData) == 0x38,
+              "JoyButtonOnlyPollingData is an invalid size");
+
+struct JoyDisableSixAxisPollingEntry {
+    u64 sampling_number;
+    JoyDisableSixAxisPollingData polling_data;
+};
+static_assert(sizeof(JoyDisableSixAxisPollingEntry) == 0x38,
+              "JoyDisableSixAxisPollingEntry is an invalid size");
+
+struct JoyEnableSixAxisPollingEntry {
+    u64 sampling_number;
+    JoyEnableSixAxisPollingData polling_data;
+};
+static_assert(sizeof(JoyEnableSixAxisPollingEntry) == 0x20,
+              "JoyEnableSixAxisPollingEntry is an invalid size");
+
+struct JoyButtonOnlyPollingEntry {
+    u64 sampling_number;
+    JoyButtonOnlyPollingData polling_data;
+};
+static_assert(sizeof(JoyButtonOnlyPollingEntry) == 0x40,
+              "JoyButtonOnlyPollingEntry is an invalid size");
+
+struct JoyDisableSixAxisDataAccessor {
+    DataAccessorHeader header{};
+    std::array<JoyDisableSixAxisPollingEntry, 0xb> entries{};
+};
+static_assert(sizeof(JoyDisableSixAxisDataAccessor) == 0x298,
+              "JoyDisableSixAxisDataAccessor is an invalid size");
+
+struct JoyEnableSixAxisDataAccessor {
+    DataAccessorHeader header{};
+    std::array<JoyEnableSixAxisPollingEntry, 0xb> entries{};
+};
+static_assert(sizeof(JoyEnableSixAxisDataAccessor) == 0x190,
+              "JoyEnableSixAxisDataAccessor is an invalid size");
+
+struct ButtonOnlyPollingDataAccessor {
+    DataAccessorHeader header;
+    std::array<JoyButtonOnlyPollingEntry, 0xb> entries;
+};
+static_assert(sizeof(ButtonOnlyPollingDataAccessor) == 0x2F0,
+              "ButtonOnlyPollingDataAccessor is an invalid size");
+
+class HidbusBase {
+public:
+    explicit HidbusBase(KernelHelpers::ServiceContext& service_context_);
+    virtual ~HidbusBase();
+
+    void ActivateDevice();
+
+    void DeactivateDevice();
+
+    bool IsDeviceActivated() const;
+
+    // Enables/disables the device
+    void Enable(bool enable);
+
+    // returns true if device is enabled
+    bool IsEnabled() const;
+
+    // returns true if polling mode is enabled
+    bool IsPollingMode() const;
+
+    // returns polling mode
+    JoyPollingMode GetPollingMode() const;
+
+    // Sets and enables JoyPollingMode
+    void SetPollingMode(JoyPollingMode mode);
+
+    // Disables JoyPollingMode
+    void DisablePollingMode();
+
+    // Called on EnableJoyPollingReceiveMode
+    void SetTransferMemoryPointer(u8* t_mem);
+
+    Kernel::KReadableEvent& GetSendCommandAsycEvent() const;
+
+    virtual void OnInit() {}
+
+    virtual void OnRelease() {}
+
+    // Updates device transfer memory
+    virtual void OnUpdate() {}
+
+    // Returns the device ID of the joycon
+    virtual u8 GetDeviceId() const {
+        return {};
+    }
+
+    // Assigns a command from data
+    virtual bool SetCommand(const std::vector<u8>& data) {
+        return {};
+    }
+
+    // Returns a reply from a command
+    virtual std::vector<u8> GetReply() const {
+        return {};
+    }
+
+protected:
+    bool is_activated{};
+    bool device_enabled{};
+    bool polling_mode_enabled{};
+    JoyPollingMode polling_mode = {};
+    JoyDisableSixAxisDataAccessor disable_sixaxis_data{};
+    JoyEnableSixAxisDataAccessor enable_sixaxis_data{};
+    ButtonOnlyPollingDataAccessor button_only_data{};
+
+    u8* transfer_memory{nullptr};
+    bool is_transfer_memory_set{};
+
+    Kernel::KEvent* send_command_asyc_event;
+    KernelHelpers::ServiceContext& service_context;
+};
+} // namespace Service::HID

src/core/hle/service/hid/hidbus/ringcon.cpp

@@ -0,0 +1,306 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hid/emulated_controller.h"
+#include "core/hid/hid_core.h"
+#include "core/hle/kernel/k_event.h"
+#include "core/hle/kernel/k_readable_event.h"
+#include "core/hle/service/hid/hidbus/ringcon.h"
+
+namespace Service::HID {
+
+RingController::RingController(Core::HID::HIDCore& hid_core_,
+                               KernelHelpers::ServiceContext& service_context_)
+    : HidbusBase(service_context_) {
+    // Use the horizontal axis of left stick for emulating input
+    // There is no point on adding a frontend implementation since Ring Fit Adventure doesn't work
+    input = hid_core_.GetEmulatedController(Core::HID::NpadIdType::Player1);
+}
+
+RingController::~RingController() = default;
+
+void RingController::OnInit() {
+    return;
+}
+
+void RingController::OnRelease() {
+    return;
+};
+
+void RingController::OnUpdate() {
+    if (!is_activated) {
+        return;
+    }
+
+    if (!device_enabled) {
+        return;
+    }
+
+    if (!polling_mode_enabled || !is_transfer_memory_set) {
+        return;
+    }
+
+    switch (polling_mode) {
+    case JoyPollingMode::SixAxisSensorEnable: {
+        enable_sixaxis_data.header.total_entries = 10;
+        enable_sixaxis_data.header.result = ResultSuccess;
+        const auto& last_entry =
+            enable_sixaxis_data.entries[enable_sixaxis_data.header.latest_entry];
+
+        enable_sixaxis_data.header.latest_entry =
+            (enable_sixaxis_data.header.latest_entry + 1) % 10;
+        auto& curr_entry = enable_sixaxis_data.entries[enable_sixaxis_data.header.latest_entry];
+
+        curr_entry.sampling_number = last_entry.sampling_number + 1;
+        curr_entry.polling_data.sampling_number = curr_entry.sampling_number;
+
+        const RingConData ringcon_value = GetSensorValue();
+        curr_entry.polling_data.out_size = sizeof(ringcon_value);
+        std::memcpy(curr_entry.polling_data.data.data(), &ringcon_value, sizeof(ringcon_value));
+
+        std::memcpy(transfer_memory, &enable_sixaxis_data, sizeof(enable_sixaxis_data));
+        break;
+    }
+    default:
+        LOG_ERROR(Service_HID, "Polling mode not supported {}", polling_mode);
+        break;
+    }
+}
+
+RingController::RingConData RingController::GetSensorValue() const {
+    RingConData ringcon_sensor_value{
+        .status = DataValid::Valid,
+        .data = 0,
+    };
+
+    const f32 stick_value = static_cast<f32>(input->GetSticks().left.x) / 32767.0f;
+
+    ringcon_sensor_value.data = static_cast<s16>(stick_value * range) + idle_value;
+
+    return ringcon_sensor_value;
+}
+
+u8 RingController::GetDeviceId() const {
+    return device_id;
+}
+
+std::vector<u8> RingController::GetReply() const {
+    const RingConCommands current_command = command;
+
+    switch (current_command) {
+    case RingConCommands::GetFirmwareVersion:
+        return GetFirmwareVersionReply();
+    case RingConCommands::ReadId:
+        return GetReadIdReply();
+    case RingConCommands::c20105:
+        return GetC020105Reply();
+    case RingConCommands::ReadUnkCal:
+        return GetReadUnkCalReply();
+    case RingConCommands::ReadFactoryCal:
+        return GetReadFactoryCalReply();
+    case RingConCommands::ReadUserCal:
+        return GetReadUserCalReply();
+    case RingConCommands::ReadRepCount:
+        return GetReadRepCountReply();
+    case RingConCommands::ReadTotalPushCount:
+        return GetReadTotalPushCountReply();
+    case RingConCommands::SaveCalData:
+        return GetSaveDataReply();
+    default:
+        return GetErrorReply();
+    }
+}
+
+bool RingController::SetCommand(const std::vector<u8>& data) {
+    if (data.size() < 4) {
+        LOG_ERROR(Service_HID, "Command size not supported {}", data.size());
+        command = RingConCommands::Error;
+        return false;
+    }
+
+    // There must be a better way to do this
+    const u32 command_id =
+        u32{data[0]} + (u32{data[1]} << 8) + (u32{data[2]} << 16) + (u32{data[3]} << 24);
+    static constexpr std::array supported_commands = {
+        RingConCommands::GetFirmwareVersion,
+        RingConCommands::ReadId,
+        RingConCommands::c20105,
+        RingConCommands::ReadUnkCal,
+        RingConCommands::ReadFactoryCal,
+        RingConCommands::ReadUserCal,
+        RingConCommands::ReadRepCount,
+        RingConCommands::ReadTotalPushCount,
+        RingConCommands::SaveCalData,
+    };
+
+    for (RingConCommands cmd : supported_commands) {
+        if (command_id == static_cast<u32>(cmd)) {
+            return ExcecuteCommand(cmd, data);
+        }
+    }
+
+    LOG_ERROR(Service_HID, "Command not implemented {}", command_id);
+    command = RingConCommands::Error;
+    // Signal a reply to avoid softlocking
+    send_command_asyc_event->GetWritableEvent().Signal();
+    return false;
+}
+
+bool RingController::ExcecuteCommand(RingConCommands cmd, const std::vector<u8>& data) {
+    switch (cmd) {
+    case RingConCommands::GetFirmwareVersion:
+    case RingConCommands::ReadId:
+    case RingConCommands::c20105:
+    case RingConCommands::ReadUnkCal:
+    case RingConCommands::ReadFactoryCal:
+    case RingConCommands::ReadUserCal:
+    case RingConCommands::ReadRepCount:
+    case RingConCommands::ReadTotalPushCount:
+        ASSERT_MSG(data.size() == 0x4, "data.size is not 0x4 bytes");
+        command = cmd;
+        send_command_asyc_event->GetWritableEvent().Signal();
+        return true;
+    case RingConCommands::SaveCalData: {
+        ASSERT_MSG(data.size() == 0x14, "data.size is not 0x14 bytes");
+
+        SaveCalData save_info{};
+        std::memcpy(&save_info, &data, sizeof(SaveCalData));
+        user_calibration = save_info.calibration;
+
+        command = cmd;
+        send_command_asyc_event->GetWritableEvent().Signal();
+        return true;
+    }
+    default:
+        LOG_ERROR(Service_HID, "Command not implemented {}", cmd);
+        command = RingConCommands::Error;
+        return false;
+    }
+}
+
+std::vector<u8> RingController::GetFirmwareVersionReply() const {
+    const FirmwareVersionReply reply{
+        .status = DataValid::Valid,
+        .firmware = version,
+    };
+
+    return GetDataVector(reply);
+}
+
+std::vector<u8> RingController::GetReadIdReply() const {
+    // The values are hardcoded from a real joycon
+    const ReadIdReply reply{
+        .status = DataValid::Valid,
+        .id_l_x0 = 8,
+        .id_l_x0_2 = 41,
+        .id_l_x4 = 22294,
+        .id_h_x0 = 19777,
+        .id_h_x0_2 = 13621,
+        .id_h_x4 = 8245,
+    };
+
+    return GetDataVector(reply);
+}
+
+std::vector<u8> RingController::GetC020105Reply() const {
+    const Cmd020105Reply reply{
+        .status = DataValid::Valid,
+        .data = 1,
+    };
+
+    return GetDataVector(reply);
+}
+
+std::vector<u8> RingController::GetReadUnkCalReply() const {
+    const ReadUnkCalReply reply{
+        .status = DataValid::Valid,
+        .data = 0,
+    };
+
+    return GetDataVector(reply);
+}
+
+std::vector<u8> RingController::GetReadFactoryCalReply() const {
+    const ReadFactoryCalReply reply{
+        .status = DataValid::Valid,
+        .calibration = factory_calibration,
+    };
+
+    return GetDataVector(reply);
+}
+
+std::vector<u8> RingController::GetReadUserCalReply() const {
+    const ReadUserCalReply reply{
+        .status = DataValid::Valid,
+        .calibration = user_calibration,
+    };
+
+    return GetDataVector(reply);
+}
+
+std::vector<u8> RingController::GetReadRepCountReply() const {
+    // The values are hardcoded from a real joycon
+    const GetThreeByteReply reply{
+        .status = DataValid::Valid,
+        .data = {30, 0, 0},
+        .crc = GetCrcValue({30, 0, 0, 0}),
+    };
+
+    return GetDataVector(reply);
+}
+
+std::vector<u8> RingController::GetReadTotalPushCountReply() const {
+    // The values are hardcoded from a real joycon
+    const GetThreeByteReply reply{
+        .status = DataValid::Valid,
+        .data = {30, 0, 0},
+        .crc = GetCrcValue({30, 0, 0, 0}),
+    };
+
+    return GetDataVector(reply);
+}
+
+std::vector<u8> RingController::GetSaveDataReply() const {
+    const StatusReply reply{
+        .status = DataValid::Valid,
+    };
+
+    return GetDataVector(reply);
+}
+
+std::vector<u8> RingController::GetErrorReply() const {
+    const ErrorReply reply{
+        .status = DataValid::BadCRC,
+    };
+
+    return GetDataVector(reply);
+}
+
+u8 RingController::GetCrcValue(const std::vector<u8>& data) const {
+    u8 crc = 0;
+    for (std::size_t index = 0; index < data.size(); index++) {
+        for (u8 i = 0x80; i > 0; i >>= 1) {
+            bool bit = (crc & 0x80) != 0;
+            if ((data[index] & i) != 0) {
+                bit = !bit;
+            }
+            crc <<= 1;
+            if (bit) {
+                crc ^= 0x8d;
+            }
+        }
+    }
+    return crc;
+}
+
+template <typename T>
+std::vector<u8> RingController::GetDataVector(const T& reply) const {
+    static_assert(std::is_trivially_copyable_v<T>);
+    std::vector<u8> data;
+    data.resize(sizeof(reply));
+    std::memcpy(data.data(), &reply, sizeof(reply));
+    return data;
+}
+
+} // namespace Service::HID

src/core/hle/service/hid/hidbus/ringcon.h

@@ -0,0 +1,247 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+
+#include "common/common_types.h"
+#include "core/hle/service/hid/hidbus/hidbus_base.h"
+
+namespace Core::HID {
+class EmulatedController;
+} // namespace Core::HID
+
+namespace Service::HID {
+
+class RingController final : public HidbusBase {
+public:
+    explicit RingController(Core::HID::HIDCore& hid_core_,
+                            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(const std::vector<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;
+
+    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,
+        Unknown9 = 0x04013104,
+        Unknown10 = 0x04011104,
+        Unknown11 = 0x04011204,
+        Unknown12 = 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");
+
+    // Executes the command requested
+    bool ExcecuteCommand(RingConCommands cmd, const std::vector<u8>& data);
+
+    // 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;
+
+    // (STUBBED) Returns 8 byte reply
+    std::vector<u8> GetReadRepCountReply() const;
+
+    // (STUBBED) Returns 8 byte reply
+    std::vector<u8> GetReadTotalPushCountReply() 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};
+
+    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

src/core/hle/service/hid/hidbus/starlink.cpp

@@ -0,0 +1,51 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hid/emulated_controller.h"
+#include "core/hid/hid_core.h"
+#include "core/hle/service/hid/hidbus/starlink.h"
+
+namespace Service::HID {
+constexpr u8 DEVICE_ID = 0x28;
+
+Starlink::Starlink(Core::HID::HIDCore& hid_core_, KernelHelpers::ServiceContext& service_context_)
+    : HidbusBase(service_context_) {}
+Starlink::~Starlink() = default;
+
+void Starlink::OnInit() {
+    return;
+}
+
+void Starlink::OnRelease() {
+    return;
+};
+
+void Starlink::OnUpdate() {
+    if (!is_activated) {
+        return;
+    }
+    if (!device_enabled) {
+        return;
+    }
+    if (!polling_mode_enabled || !is_transfer_memory_set) {
+        return;
+    }
+
+    LOG_ERROR(Service_HID, "Polling mode not supported {}", polling_mode);
+}
+
+u8 Starlink::GetDeviceId() const {
+    return DEVICE_ID;
+}
+
+std::vector<u8> Starlink::GetReply() const {
+    return {};
+}
+
+bool Starlink::SetCommand(const std::vector<u8>& data) {
+    LOG_ERROR(Service_HID, "Command not implemented");
+    return false;
+}
+
+} // namespace Service::HID

src/core/hle/service/hid/hidbus/starlink.h

@@ -0,0 +1,39 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+#include "core/hle/service/hid/hidbus/hidbus_base.h"
+
+namespace Core::HID {
+class EmulatedController;
+} // namespace Core::HID
+
+namespace Service::HID {
+
+class Starlink final : public HidbusBase {
+public:
+    explicit Starlink(Core::HID::HIDCore& hid_core_,
+                      KernelHelpers::ServiceContext& service_context_);
+    ~Starlink() 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(const std::vector<u8>& data) override;
+
+    // Returns a reply from a command
+    std::vector<u8> GetReply() const override;
+};
+
+} // namespace Service::HID

src/core/hle/service/hid/hidbus/stubbed.cpp

@@ -0,0 +1,52 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hid/emulated_controller.h"
+#include "core/hid/hid_core.h"
+#include "core/hle/service/hid/hidbus/stubbed.h"
+
+namespace Service::HID {
+constexpr u8 DEVICE_ID = 0xFF;
+
+HidbusStubbed::HidbusStubbed(Core::HID::HIDCore& hid_core_,
+                             KernelHelpers::ServiceContext& service_context_)
+    : HidbusBase(service_context_) {}
+HidbusStubbed::~HidbusStubbed() = default;
+
+void HidbusStubbed::OnInit() {
+    return;
+}
+
+void HidbusStubbed::OnRelease() {
+    return;
+};
+
+void HidbusStubbed::OnUpdate() {
+    if (!is_activated) {
+        return;
+    }
+    if (!device_enabled) {
+        return;
+    }
+    if (!polling_mode_enabled || !is_transfer_memory_set) {
+        return;
+    }
+
+    LOG_ERROR(Service_HID, "Polling mode not supported {}", polling_mode);
+}
+
+u8 HidbusStubbed::GetDeviceId() const {
+    return DEVICE_ID;
+}
+
+std::vector<u8> HidbusStubbed::GetReply() const {
+    return {};
+}
+
+bool HidbusStubbed::SetCommand(const std::vector<u8>& data) {
+    LOG_ERROR(Service_HID, "Command not implemented");
+    return false;
+}
+
+} // namespace Service::HID

src/core/hle/service/hid/hidbus/stubbed.h

@@ -0,0 +1,39 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+#include "core/hle/service/hid/hidbus/hidbus_base.h"
+
+namespace Core::HID {
+class EmulatedController;
+} // namespace Core::HID
+
+namespace Service::HID {
+
+class HidbusStubbed final : public HidbusBase {
+public:
+    explicit HidbusStubbed(Core::HID::HIDCore& hid_core_,
+                           KernelHelpers::ServiceContext& service_context_);
+    ~HidbusStubbed() 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(const std::vector<u8>& data) override;
+
+    // Returns a reply from a command
+    std::vector<u8> GetReply() const override;
+};
+
+} // namespace Service::HID