7 files changed, 241 insertions, 0 deletions
diff --git a/src/input/include/feedback_device.hpp b/src/input/include/feedback_device.hpp
new file mode 100644
index 00000000..4faeeafd
--- /dev/null
+++ b/src/input/include/feedback_device.hpp
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <cstdint>
+
+namespace input {
+
+/*
+ * Interface for providing non-visual feedback to the user as a result of LVGL
+ * events. 'Feedback Devices' are able to observe all events that are generated
+ * by LVGL as a result of Input Devices.
+ *
+ * Implementations of this interface are a mix of hardware features (e.g. a
+ * haptic motor buzzing when your selection changes) and firmware features
+ * (e.g. playing audio feedback that describes the selected element).
+ */
+class IFeedbackDevice {
+ public:
+  virtual ~IFeedbackDevice() {}
+
+  virtual auto feedback(uint8_t event_type) -> void = 0;
+
+  // TODO: Add configuration; likely the same shape of interface that
+  // IInputDevice uses.
+};
+
+}  // namespace input
diff --git a/src/input/include/feedback_haptics.hpp b/src/input/include/feedback_haptics.hpp
new file mode 100644
index 00000000..a307a429
--- /dev/null
+++ b/src/input/include/feedback_haptics.hpp
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <cstdint>
+
+#include "feedback_device.hpp"
+#include "haptics.hpp"
+
+namespace input {
+
+class Haptics : public IFeedbackDevice {
+ public:
+  Haptics(drivers::Haptics& haptics_);
+
+  auto feedback(uint8_t event_type) -> void override;
+
+ private:
+  drivers::Haptics& haptics_;
+};
+
+}  // namespace input
diff --git a/src/input/include/input_device.hpp b/src/input/include/input_device.hpp
new file mode 100644
index 00000000..09cf9193
--- /dev/null
+++ b/src/input/include/input_device.hpp
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <functional>
+#include <string>
+#include <vector>
+
+#include "hal/lv_hal_indev.h"
+
+namespace input {
+
+/*
+ * Interface for all device input methods. Each 'Input Device' is polled by
+ * LVGL at regular intervals, and can effect the device either via LVGL's input
+ * device driver API, or by emitting events for other parts of the system to
+ * react to (e.g. issuing a play/pause event, or altering the volume).
+ */
+class IInputDevice {
+ public:
+  virtual ~IInputDevice() {}
+
+  virtual auto read(lv_indev_data_t* data) -> void = 0;
+
+  // TODO: Add hooks and configuration (or are hooks just one kind of
+  // configuration?)
+};
+
+}  // namespace input
diff --git a/src/input/include/input_touch_dpad.hpp b/src/input/include/input_touch_dpad.hpp
new file mode 100644
index 00000000..fdb52db9
--- /dev/null
+++ b/src/input/include/input_touch_dpad.hpp
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <cstdint>
+
+#include "hal/lv_hal_indev.h"
+
+#include "haptics.hpp"
+#include "input_device.hpp"
+#include "touchwheel.hpp"
+
+namespace input {
+
+class TouchDPad : public IInputDevice {
+ public:
+  TouchDPad(drivers::TouchWheel&);
+
+  auto read(lv_indev_data_t* data) -> void override;
+
+ private:
+  drivers::TouchWheel& wheel_;
+};
+
+}  // namespace input
diff --git a/src/input/include/input_touch_wheel.hpp b/src/input/include/input_touch_wheel.hpp
new file mode 100644
index 00000000..a4923f21
--- /dev/null
+++ b/src/input/include/input_touch_wheel.hpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <cstdint>
+
+#include "hal/lv_hal_indev.h"
+
+#include "haptics.hpp"
+#include "input_device.hpp"
+#include "touchwheel.hpp"
+
+namespace input {
+
+class TouchWheel : public IInputDevice {
+ public:
+  TouchWheel(drivers::TouchWheel&);
+
+  auto read(lv_indev_data_t* data) -> void override;
+
+ private:
+  auto calculate_ticks(const drivers::TouchWheelData& data) -> int8_t;
+
+  drivers::TouchWheel& wheel_;
+
+  bool is_scrolling_;
+  uint8_t sensitivity_;
+  uint8_t threshold_;
+  bool is_first_read_;
+  uint8_t last_angle_;
+};
+
+}  // namespace input
diff --git a/src/input/include/input_volume_buttons.hpp b/src/input/include/input_volume_buttons.hpp
new file mode 100644
index 00000000..4ca8c16b
--- /dev/null
+++ b/src/input/include/input_volume_buttons.hpp
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <cstdint>
+
+#include "gpios.hpp"
+#include "hal/lv_hal_indev.h"
+
+#include "haptics.hpp"
+#include "input_device.hpp"
+#include "touchwheel.hpp"
+
+namespace input {
+
+class VolumeButtons : public IInputDevice {
+ public:
+  VolumeButtons(drivers::IGpios&);
+
+  auto read(lv_indev_data_t* data) -> void override;
+
+ private:
+  drivers::IGpios& gpios_;
+};
+
+}  // namespace input
diff --git a/src/input/include/lvgl_input_driver.hpp b/src/input/include/lvgl_input_driver.hpp
new file mode 100644
index 00000000..be452368
--- /dev/null
+++ b/src/input/include/lvgl_input_driver.hpp
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <deque>
+#include <memory>
+#include <set>
+
+#include "core/lv_group.h"
+#include "feedback_device.hpp"
+#include "gpios.hpp"
+#include "hal/lv_hal_indev.h"
+
+#include "input_device.hpp"
+#include "nvs.hpp"
+#include "service_locator.hpp"
+#include "touchwheel.hpp"
+
+namespace input {
+
+/*
+ * Implementation of an LVGL input device. This class composes multiple
+ * IInputDevice and IFeedbackDevice instances together into a single LVGL
+ * device.
+ */
+class LvglInputDriver {
+ public:
+  LvglInputDriver(std::shared_ptr<system_fsm::ServiceLocator>);
+
+  auto read(lv_indev_data_t* data) -> void;
+  auto feedback(uint8_t) -> void;
+
+  auto registration() -> lv_indev_t* { return registration_; }
+  auto lock(bool l) -> void { is_locked_ = l; }
+
+ private:
+  std::shared_ptr<system_fsm::ServiceLocator> services_;
+
+  lv_indev_drv_t driver_;
+  lv_indev_t* registration_;
+
+  std::vector<std::unique_ptr<IInputDevice>> inputs_;
+  std::vector<std::unique_ptr<IFeedbackDevice>> feedbacks_;
+
+  bool is_locked_;
+};
+
+}  // namespace input