1 files changed, 218 insertions, 0 deletions
diff --git a/src/input_common/helpers/joycon_protocol/calibration.cpp b/src/input_common/helpers/joycon_protocol/calibration.cpp
new file mode 100644
index 000000000..d8f040f75
--- /dev/null
+++ b/src/input_common/helpers/joycon_protocol/calibration.cpp
@@ -0,0 +1,218 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <cstring>
+
+#include "input_common/helpers/joycon_protocol/calibration.h"
+#include "input_common/helpers/joycon_protocol/joycon_types.h"
+
+namespace InputCommon::Joycon {
+
+CalibrationProtocol::CalibrationProtocol(std::shared_ptr<JoyconHandle> handle)
+    : JoyconCommonProtocol(std::move(handle)) {}
+
+DriverResult CalibrationProtocol::GetLeftJoyStickCalibration(JoyStickCalibration& calibration) {
+    ScopedSetBlocking sb(this);
+    DriverResult result{DriverResult::Success};
+    JoystickLeftSpiCalibration spi_calibration{};
+    bool has_user_calibration = false;
+    calibration = {};
+
+    if (result == DriverResult::Success) {
+        result = HasUserCalibration(SpiAddress::USER_LEFT_MAGIC, has_user_calibration);
+    }
+
+    // Read User defined calibration
+    if (result == DriverResult::Success && has_user_calibration) {
+        result = ReadSPI(SpiAddress::USER_LEFT_DATA, spi_calibration);
+    }
+
+    // Read Factory calibration
+    if (result == DriverResult::Success && !has_user_calibration) {
+        result = ReadSPI(SpiAddress::FACT_LEFT_DATA, spi_calibration);
+    }
+
+    if (result == DriverResult::Success) {
+        calibration.x.center = GetXAxisCalibrationValue(spi_calibration.center);
+        calibration.y.center = GetYAxisCalibrationValue(spi_calibration.center);
+        calibration.x.min = GetXAxisCalibrationValue(spi_calibration.min);
+        calibration.y.min = GetYAxisCalibrationValue(spi_calibration.min);
+        calibration.x.max = GetXAxisCalibrationValue(spi_calibration.max);
+        calibration.y.max = GetYAxisCalibrationValue(spi_calibration.max);
+    }
+
+    // Set a valid default calibration if data is missing
+    ValidateCalibration(calibration);
+
+    return result;
+}
+
+DriverResult CalibrationProtocol::GetRightJoyStickCalibration(JoyStickCalibration& calibration) {
+    ScopedSetBlocking sb(this);
+    DriverResult result{DriverResult::Success};
+    JoystickRightSpiCalibration spi_calibration{};
+    bool has_user_calibration = false;
+    calibration = {};
+
+    if (result == DriverResult::Success) {
+        result = HasUserCalibration(SpiAddress::USER_RIGHT_MAGIC, has_user_calibration);
+    }
+
+    // Read User defined calibration
+    if (result == DriverResult::Success && has_user_calibration) {
+        result = ReadSPI(SpiAddress::USER_RIGHT_DATA, spi_calibration);
+    }
+
+    // Read Factory calibration
+    if (result == DriverResult::Success && !has_user_calibration) {
+        result = ReadSPI(SpiAddress::FACT_RIGHT_DATA, spi_calibration);
+    }
+
+    if (result == DriverResult::Success) {
+        calibration.x.center = GetXAxisCalibrationValue(spi_calibration.center);
+        calibration.y.center = GetYAxisCalibrationValue(spi_calibration.center);
+        calibration.x.min = GetXAxisCalibrationValue(spi_calibration.min);
+        calibration.y.min = GetYAxisCalibrationValue(spi_calibration.min);
+        calibration.x.max = GetXAxisCalibrationValue(spi_calibration.max);
+        calibration.y.max = GetYAxisCalibrationValue(spi_calibration.max);
+    }
+
+    // Set a valid default calibration if data is missing
+    ValidateCalibration(calibration);
+
+    return result;
+}
+
+DriverResult CalibrationProtocol::GetImuCalibration(MotionCalibration& calibration) {
+    ScopedSetBlocking sb(this);
+    DriverResult result{DriverResult::Success};
+    ImuSpiCalibration spi_calibration{};
+    bool has_user_calibration = false;
+    calibration = {};
+
+    if (result == DriverResult::Success) {
+        result = HasUserCalibration(SpiAddress::USER_IMU_MAGIC, has_user_calibration);
+    }
+
+    // Read User defined calibration
+    if (result == DriverResult::Success && has_user_calibration) {
+        result = ReadSPI(SpiAddress::USER_IMU_DATA, spi_calibration);
+    }
+
+    // Read Factory calibration
+    if (result == DriverResult::Success && !has_user_calibration) {
+        result = ReadSPI(SpiAddress::FACT_IMU_DATA, spi_calibration);
+    }
+
+    if (result == DriverResult::Success) {
+        calibration.accelerometer[0].offset = spi_calibration.accelerometer_offset[0];
+        calibration.accelerometer[1].offset = spi_calibration.accelerometer_offset[1];
+        calibration.accelerometer[2].offset = spi_calibration.accelerometer_offset[2];
+
+        calibration.accelerometer[0].scale = spi_calibration.accelerometer_scale[0];
+        calibration.accelerometer[1].scale = spi_calibration.accelerometer_scale[1];
+        calibration.accelerometer[2].scale = spi_calibration.accelerometer_scale[2];
+
+        calibration.gyro[0].offset = spi_calibration.gyroscope_offset[0];
+        calibration.gyro[1].offset = spi_calibration.gyroscope_offset[1];
+        calibration.gyro[2].offset = spi_calibration.gyroscope_offset[2];
+
+        calibration.gyro[0].scale = spi_calibration.gyroscope_scale[0];
+        calibration.gyro[1].scale = spi_calibration.gyroscope_scale[1];
+        calibration.gyro[2].scale = spi_calibration.gyroscope_scale[2];
+    }
+
+    ValidateCalibration(calibration);
+
+    return result;
+}
+
+DriverResult CalibrationProtocol::GetRingCalibration(RingCalibration& calibration,
+                                                     s16 current_value) {
+    constexpr s16 DefaultRingRange{800};
+
+    // TODO: Get default calibration form ring itself
+    if (ring_data_max == 0 && ring_data_min == 0) {
+        ring_data_max = current_value + DefaultRingRange;
+        ring_data_min = current_value - DefaultRingRange;
+        ring_data_default = current_value;
+    }
+    ring_data_max = std::max(ring_data_max, current_value);
+    ring_data_min = std::min(ring_data_min, current_value);
+    calibration = {
+        .default_value = ring_data_default,
+        .max_value = ring_data_max,
+        .min_value = ring_data_min,
+    };
+    return DriverResult::Success;
+}
+
+DriverResult CalibrationProtocol::HasUserCalibration(SpiAddress address,
+                                                     bool& has_user_calibration) {
+    MagicSpiCalibration spi_magic{};
+    const DriverResult result{ReadSPI(address, spi_magic)};
+    has_user_calibration = false;
+    if (result == DriverResult::Success) {
+        has_user_calibration = spi_magic.first == CalibrationMagic::USR_MAGIC_0 &&
+                               spi_magic.second == CalibrationMagic::USR_MAGIC_1;
+    }
+    return result;
+}
+
+u16 CalibrationProtocol::GetXAxisCalibrationValue(std::span<u8> block) const {
+    return static_cast<u16>(((block[1] & 0x0F) << 8) | block[0]);
+}
+
+u16 CalibrationProtocol::GetYAxisCalibrationValue(std::span<u8> block) const {
+    return static_cast<u16>((block[2] << 4) | (block[1] >> 4));
+}
+
+void CalibrationProtocol::ValidateCalibration(JoyStickCalibration& calibration) {
+    constexpr u16 DefaultStickCenter{0x800};
+    constexpr u16 DefaultStickRange{0x6cc};
+
+    calibration.x.center = ValidateValue(calibration.x.center, DefaultStickCenter);
+    calibration.x.max = ValidateValue(calibration.x.max, DefaultStickRange);
+    calibration.x.min = ValidateValue(calibration.x.min, DefaultStickRange);
+
+    calibration.y.center = ValidateValue(calibration.y.center, DefaultStickCenter);
+    calibration.y.max = ValidateValue(calibration.y.max, DefaultStickRange);
+    calibration.y.min = ValidateValue(calibration.y.min, DefaultStickRange);
+}
+
+void CalibrationProtocol::ValidateCalibration(MotionCalibration& calibration) {
+    constexpr s16 DefaultAccelerometerScale{0x4000};
+    constexpr s16 DefaultGyroScale{0x3be7};
+    constexpr s16 DefaultOffset{0};
+
+    for (auto& sensor : calibration.accelerometer) {
+        sensor.scale = ValidateValue(sensor.scale, DefaultAccelerometerScale);
+        sensor.offset = ValidateValue(sensor.offset, DefaultOffset);
+    }
+    for (auto& sensor : calibration.gyro) {
+        sensor.scale = ValidateValue(sensor.scale, DefaultGyroScale);
+        sensor.offset = ValidateValue(sensor.offset, DefaultOffset);
+    }
+}
+
+u16 CalibrationProtocol::ValidateValue(u16 value, u16 default_value) const {
+    if (value == 0) {
+        return default_value;
+    }
+    if (value == 0xFFF) {
+        return default_value;
+    }
+    return value;
+}
+
+s16 CalibrationProtocol::ValidateValue(s16 value, s16 default_value) const {
+    if (value == 0) {
+        return default_value;
+    }
+    if (value == 0xFFF) {
+        return default_value;
+    }
+    return value;
+}
+
+} // namespace InputCommon::Joycon