1 files changed, 117 insertions, 0 deletions

diff --git a/src/input_common/helpers/joycon_protocol/ringcon.cpp b/src/input_common/helpers/joycon_protocol/ringcon.cpp
new file mode 100644
index 000000000..12f81309e
--- /dev/null
+++ b/src/input_common/helpers/joycon_protocol/ringcon.cpp
@@ -0,0 +1,117 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/logging/log.h"
+#include "input_common/helpers/joycon_protocol/ringcon.h"
+
+namespace InputCommon::Joycon {
+
+RingConProtocol::RingConProtocol(std::shared_ptr<JoyconHandle> handle)
+    : JoyconCommonProtocol(std::move(handle)) {}
+
+DriverResult RingConProtocol::EnableRingCon() {
+    LOG_DEBUG(Input, "Enable Ringcon");
+    ScopedSetBlocking sb(this);
+    DriverResult result{DriverResult::Success};
+
+    if (result == DriverResult::Success) {
+        result = SetReportMode(ReportMode::STANDARD_FULL_60HZ);
+    }
+    if (result == DriverResult::Success) {
+        result = EnableMCU(true);
+    }
+    if (result == DriverResult::Success) {
+        const MCUConfig config{
+            .command = MCUCommand::ConfigureMCU,
+            .sub_command = MCUSubCommand::SetDeviceMode,
+            .mode = MCUMode::Standby,
+            .crc = {},
+        };
+        result = ConfigureMCU(config);
+    }
+
+    return result;
+}
+
+DriverResult RingConProtocol::DisableRingCon() {
+    LOG_DEBUG(Input, "Disable RingCon");
+    ScopedSetBlocking sb(this);
+    DriverResult result{DriverResult::Success};
+
+    if (result == DriverResult::Success) {
+        result = EnableMCU(false);
+    }
+
+    is_enabled = false;
+
+    return result;
+}
+
+DriverResult RingConProtocol::StartRingconPolling() {
+    LOG_DEBUG(Input, "Enable Ringcon");
+    ScopedSetBlocking sb(this);
+    DriverResult result{DriverResult::Success};
+    bool is_connected = false;
+
+    if (result == DriverResult::Success) {
+        result = IsRingConnected(is_connected);
+    }
+    if (result == DriverResult::Success && is_connected) {
+        LOG_INFO(Input, "Ringcon detected");
+        result = ConfigureRing();
+    }
+    if (result == DriverResult::Success) {
+        is_enabled = true;
+    }
+
+    return result;
+}
+
+DriverResult RingConProtocol::IsRingConnected(bool& is_connected) {
+    LOG_DEBUG(Input, "IsRingConnected");
+    constexpr std::size_t max_tries = 28;
+    constexpr u8 ring_controller_id = 0x20;
+    std::vector<u8> output;
+    std::size_t tries = 0;
+    is_connected = false;
+
+    do {
+        std::array<u8, 1> empty_data{};
+        const auto result = SendSubCommand(SubCommand::UNKNOWN_RINGCON, empty_data, output);
+
+        if (result != DriverResult::Success) {
+            return result;
+        }
+
+        if (tries++ >= max_tries) {
+            return DriverResult::NoDeviceDetected;
+        }
+    } while (output[16] != ring_controller_id);
+
+    is_connected = true;
+    return DriverResult::Success;
+}
+
+DriverResult RingConProtocol::ConfigureRing() {
+    LOG_DEBUG(Input, "ConfigureRing");
+
+    static constexpr std::array<u8, 37> ring_config{
+        0x06, 0x03, 0x25, 0x06, 0x00, 0x00, 0x00, 0x00, 0x1C, 0x16, 0xED, 0x34, 0x36,
+        0x00, 0x00, 0x00, 0x0A, 0x64, 0x0B, 0xE6, 0xA9, 0x22, 0x00, 0x00, 0x04, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x90, 0xA8, 0xE1, 0x34, 0x36};
+
+    const DriverResult result = SendSubCommand(SubCommand::UNKNOWN_RINGCON3, ring_config);
+
+    if (result != DriverResult::Success) {
+        return result;
+    }
+
+    static constexpr std::array<u8, 4> ringcon_data{0x04, 0x01, 0x01, 0x02};
+    return SendSubCommand(SubCommand::UNKNOWN_RINGCON2, ringcon_data);
+}
+
+bool RingConProtocol::IsEnabled() const {
+    return is_enabled;
+}
+
+} // namespace InputCommon::Joycon