input_common: joycon: Implement direct ring command passthrough

src/input_common/helpers/joycon_protocol/joycon_types.h

@@ -388,6 +388,32 @@ enum class ExternalDeviceId : u16 {
     Starlink = 0x2800,
 };
 
+// Most missing command names are leftovers from other firmware versions
+enum class RingConCommand : 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 DriverResult {
     Success,
     WrongReply,
@@ -687,6 +713,57 @@ struct RingStatus {
     s16 min_value;
 };
 
+#pragma pack(push, 1)
+struct RingCommandData {
+    u8 data_type;
+    RingConCommand command;
+};
+static_assert(sizeof(RingCommandData) == 0x5, "RingCommandData is an invalid size");
+#pragma pack(pop)
+
+struct RingFactoryCalibration {
+    s32_le os_max;
+    s32_le hk_max;
+    s32_le zero_min;
+    s32_le zero_max;
+};
+static_assert(sizeof(RingFactoryCalibration) == 0x10, "RingFactoryCalibration is an invalid size");
+
+struct RingCalibrationValue {
+    s16 value;
+    u16 crc;
+};
+static_assert(sizeof(RingCalibrationValue) == 0x4, "RingCalibrationValue is an invalid size");
+
+struct RingUserCalibration {
+    RingCalibrationValue os_max;
+    RingCalibrationValue hk_max;
+    RingCalibrationValue zero;
+};
+static_assert(sizeof(RingUserCalibration) == 0xC, "RingUserCalibration is an invalid size");
+
+struct RingReadId {
+    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(RingReadId) == 0xC, "RingReadId is an invalid size");
+
+struct RingCommandReply {
+    DriverResult result;
+    RingConCommand command;
+    FirmwareVersion firmware;
+    RingFactoryCalibration factory_calibration;
+    RingUserCalibration user_calibration;
+    RingReadId read_id;
+    u8 c20105;
+    u8 total_push_count;
+    u8 total_rep_count;
+};
+
 struct VibrationPacket {
     OutputReport output_report;
     u8 packet_counter;

src/input_common/helpers/joycon_protocol/ringcon.cpp

@@ -108,6 +108,65 @@ DriverResult RingConProtocol::ConfigureRing() {
     return SendSubCommand(SubCommand::ENABLE_EXTERNAL_POLLING, ringcon_data);
 }
 
+
+DriverResult RingConProtocol::SendCommand(RingConCommand command) {
+    SubCommandResponce output{};
+    RingCommandData data{
+        .data_type = 0x04, // This seems to be always 4 for this command
+        .command = command,
+    };
+    RingCommandReply reply{
+        .result = DriverResult::Success,
+        .command = command,
+    };
+
+    std::array<u8, sizeof(RingCommandData)> raw_data{};
+    memcpy(raw_data.data(), &data, sizeof(RingCommandData));
+    const DriverResult result = SendSubCommand(SubCommand::SET_EXTERNAL_CONFIG, raw_data, output);
+
+    if (result != DriverResult::Success) {
+        reply.result = result;
+        return result;
+    }
+
+    switch (command) {
+    case RingConCommand::GetFirmwareVersion:
+        memcpy(&reply.firmware, output.command_data.data() + 6, sizeof(FirmwareVersion));
+        break;
+    case RingConCommand::ReadId:
+        memcpy(&reply.read_id, output.command_data.data() + 6,
+               sizeof(RingReadId));
+        break;
+    case RingConCommand::c20105:
+        reply.c20105 = output.command_data[6];
+        break;
+    case RingConCommand::ReadUnkCal:
+        break;
+    case RingConCommand::ReadFactoryCal:
+        memcpy(&reply.factory_calibration, output.command_data.data() + 6,
+               sizeof(RingFactoryCalibration));
+        break;
+    case RingConCommand::ReadUserCal:
+        memcpy(&reply.user_calibration, output.command_data.data() + 6, sizeof(RingUserCalibration));
+        break;
+    case RingConCommand::ReadRepCount:
+        reply.total_rep_count = output.command_data[6];
+        break;
+    case RingConCommand::ReadTotalPushCount:
+        reply.total_push_count = output.command_data[6];
+        break;
+    case RingConCommand::ResetRepCount:
+        break;
+    case RingConCommand::SaveCalData:
+        break;
+    default:
+        reply.result = DriverResult::NotSupported;
+        break;
+    }
+
+    return result;
+}
+
 bool RingConProtocol::IsEnabled() const {
     return is_enabled;
 }

src/input_common/helpers/joycon_protocol/ringcon.h

@@ -25,6 +25,9 @@ public:
 
     DriverResult StartRingconPolling();
 
+    // Hidbus can send individual commands to the ring each one with an unique reply
+    DriverResult SendCommand(RingConCommand command);
+
     bool IsEnabled() const;
 
 private: