Merge pull request 'jqln/input-devices' (#62) from jqln/input-devices into main

Reviewed-on: https://codeberg.org/cool-tech-zone/tangara-fw/pulls/62
Reviewed-by: ailurux <ailurux@noreply.codeberg.org>

34 files changed, 1021 insertions, 718 deletions

diff --git a/src/drivers/CMakeLists.txt b/src/drivers/CMakeLists.txt
index 0b7ead94..891115d4 100644
--- a/src/drivers/CMakeLists.txt
+++ b/src/drivers/CMakeLists.txt
@@ -5,8 +5,7 @@
 idf_component_register(
   SRCS "touchwheel.cpp" "i2s_dac.cpp" "gpios.cpp" "adc.cpp" "storage.cpp"
   "i2c.cpp" "bluetooth.cpp" "spi.cpp" "display.cpp" "display_init.cpp"
-  "samd.cpp" "relative_wheel.cpp" "wm8523.cpp" "nvs.cpp" "haptics.cpp"
-  "spiffs.cpp"
+  "samd.cpp" "wm8523.cpp" "nvs.cpp" "haptics.cpp" "spiffs.cpp"
   INCLUDE_DIRS "include"
   REQUIRES "esp_adc" "fatfs" "result" "lvgl" "span" "tasks" "nvs_flash" "spiffs"
   "bt" "tinyfsm" "util")
diff --git a/src/drivers/include/relative_wheel.hpp b/src/drivers/include/relative_wheel.hpp
deleted file mode 100644
index e1106143..00000000
--- a/src/drivers/include/relative_wheel.hpp
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright 2023 jacqueline <me@jacqueline.id.au>
- *
- * SPDX-License-Identifier: GPL-3.0-only
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <cstdint>
-#include <functional>
-
-#include "esp_err.h"
-#include "result.hpp"
-
-#include "gpios.hpp"
-#include "touchwheel.hpp"
-
-namespace drivers {
-
-class RelativeWheel {
- public:
-  explicit RelativeWheel(TouchWheel& touch);
-
-  auto Update() -> void;
-  auto SetEnabled(bool) -> void;
-
-  auto SetSensitivity(uint8_t) -> void;
-  auto GetSensitivity() -> uint8_t;
-
-  auto is_clicking() const -> bool;
-  auto ticks() const -> std::int_fast16_t;
-
-  // Not copyable or movable.
-  RelativeWheel(const RelativeWheel&) = delete;
-  RelativeWheel& operator=(const RelativeWheel&) = delete;
-
- private:
-  TouchWheel& touch_;
-
-  bool is_enabled_;
-  uint8_t sensitivity_;
-  uint8_t threshold_;
-
-  bool is_clicking_;
-  bool was_clicking_;
-  bool is_first_read_;
-  std::int_fast16_t ticks_;
-  uint8_t last_angle_;
-};
-
-}  // namespace drivers
diff --git a/src/drivers/include/touchwheel.hpp b/src/drivers/include/touchwheel.hpp
index 9d002156..18ace2b4 100644
--- a/src/drivers/include/touchwheel.hpp
+++ b/src/drivers/include/touchwheel.hpp
@@ -24,6 +24,10 @@ struct TouchWheelData {
 
 class TouchWheel {
  public:
+  static auto isAngleWithin(int16_t wheel_angle,
+                            int16_t target_angle,
+                            int threshold) -> bool;
+
   static auto Create() -> TouchWheel* { return new TouchWheel(); }
   TouchWheel();
   ~TouchWheel();
diff --git a/src/drivers/relative_wheel.cpp b/src/drivers/relative_wheel.cpp
deleted file mode 100644
index e90143ae..00000000
--- a/src/drivers/relative_wheel.cpp
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * Copyright 2023 jacqueline <me@jacqueline.id.au>
- *
- * SPDX-License-Identifier: GPL-3.0-only
- */
-
-#include "relative_wheel.hpp"
-
-#include <stdint.h>
-#include <cstdint>
-
-#include "esp_log.h"
-
-namespace drivers {
-
-RelativeWheel::RelativeWheel(TouchWheel& touch)
-    : touch_(touch),
-      is_enabled_(true),
-      sensitivity_(128),
-      threshold_(10),
-      is_clicking_(false),
-      was_clicking_(false),
-      is_first_read_(true),
-      ticks_(0),
-      last_angle_(0) {}
-
-auto RelativeWheel::Update() -> void {
-  TouchWheelData d = touch_.GetTouchWheelData();
-
-  is_clicking_ = d.is_button_touched;
-
-  if (is_clicking_) {
-    ticks_ = 0;
-    return;
-  }
-
-  if (!d.is_wheel_touched) {
-    ticks_ = 0;
-    is_first_read_ = true;
-    return;
-  }
-
-  uint8_t new_angle = d.wheel_position;
-  if (is_first_read_) {
-    is_first_read_ = false;
-    last_angle_ = new_angle;
-    return;
-  }
-
-  int delta = 128 - last_angle_;
-  uint8_t rotated_angle = new_angle + delta;
-  if (rotated_angle < 128 - threshold_) {
-    ticks_ = 1;
-    last_angle_ = new_angle;
-  } else if (rotated_angle > 128 + threshold_) {
-    ticks_ = -1;
-    last_angle_ = new_angle;
-  } else {
-    ticks_ = 0;
-  }
-}
-
-auto RelativeWheel::SetEnabled(bool en) -> void {
-  is_enabled_ = en;
-}
-
-auto RelativeWheel::SetSensitivity(uint8_t val) -> void {
-  sensitivity_ = val;
-  int tmax = 35;
-  int tmin = 5;
-  threshold_ = (((255. - sensitivity_)/255.)*(tmax - tmin) + tmin);
-}
-
-auto RelativeWheel::GetSensitivity() -> uint8_t {
-  return sensitivity_;
-}
-
-auto RelativeWheel::is_clicking() const -> bool {
-  if (!is_enabled_) {
-    return false;
-  }
-  return is_clicking_;
-}
-
-auto RelativeWheel::ticks() const -> std::int_fast16_t {
-  if (!is_enabled_) {
-    return 0;
-  }
-  return ticks_;
-}
-
-}  // namespace drivers
diff --git a/src/drivers/touchwheel.cpp b/src/drivers/touchwheel.cpp
index a20f434b..41b9a6af 100644
--- a/src/drivers/touchwheel.cpp
+++ b/src/drivers/touchwheel.cpp
@@ -28,6 +28,13 @@ namespace drivers {
 static const uint8_t kTouchWheelAddress = 0x1C;
 static const gpio_num_t kIntPin = GPIO_NUM_25;
 
+auto TouchWheel::isAngleWithin(int16_t wheel_angle,
+                               int16_t target_angle,
+                               int threshold) -> bool {
+  int16_t difference = (wheel_angle - target_angle + 127 + 255) % 255 - 127;
+  return difference <= threshold && difference >= -threshold;
+}
+
 TouchWheel::TouchWheel() {
   gpio_config_t int_config{
       .pin_bit_mask = 1ULL << kIntPin,
diff --git a/src/input/CMakeLists.txt b/src/input/CMakeLists.txt
new file mode 100644
index 00000000..3bc3e39d
--- /dev/null
+++ b/src/input/CMakeLists.txt
@@ -0,0 +1,12 @@
+# Copyright 2023 jacqueline <me@jacqueline.id.au>
+#
+# SPDX-License-Identifier: GPL-3.0-only
+
+idf_component_register(
+  SRCS "input_touch_wheel.cpp" "input_touch_dpad.cpp" "input_trigger.cpp"
+  "input_volume_buttons.cpp" "lvgl_input_driver.cpp" "feedback_haptics.cpp"
+  "device_factory.cpp" "input_nav_buttons.cpp"
+  INCLUDE_DIRS "include"
+  REQUIRES "drivers" "lvgl" "events" "system_fsm")
+
+target_compile_options(${COMPONENT_LIB} PRIVATE ${EXTRA_WARNINGS})
diff --git a/src/input/device_factory.cpp b/src/input/device_factory.cpp
new file mode 100644
index 00000000..65f4d785
--- /dev/null
+++ b/src/input/device_factory.cpp
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "device_factory.hpp"
+
+#include <memory>
+
+#include "feedback_haptics.hpp"
+#include "input_device.hpp"
+#include "input_nav_buttons.hpp"
+#include "input_touch_dpad.hpp"
+#include "input_touch_wheel.hpp"
+#include "input_volume_buttons.hpp"
+
+namespace input {
+
+DeviceFactory::DeviceFactory(
+    std::shared_ptr<system_fsm::ServiceLocator> services)
+    : services_(services) {
+  if (services->touchwheel()) {
+    wheel_ =
+        std::make_shared<TouchWheel>(services->nvs(), **services->touchwheel());
+  }
+}
+
+auto DeviceFactory::createInputs(drivers::NvsStorage::InputModes mode)
+    -> std::vector<std::shared_ptr<IInputDevice>> {
+  std::vector<std::shared_ptr<IInputDevice>> ret;
+  switch (mode) {
+    case drivers::NvsStorage::InputModes::kButtonsOnly:
+      ret.push_back(std::make_shared<NavButtons>(services_->gpios()));
+      break;
+    case drivers::NvsStorage::InputModes::kDirectionalWheel:
+      ret.push_back(std::make_shared<VolumeButtons>(services_->gpios()));
+      if (services_->touchwheel()) {
+        ret.push_back(std::make_shared<TouchDPad>(**services_->touchwheel()));
+      }
+      break;
+    case drivers::NvsStorage::InputModes::kRotatingWheel:
+    default:  // Don't break input over a bad enum value.
+      ret.push_back(std::make_shared<VolumeButtons>(services_->gpios()));
+      if (wheel_) {
+        ret.push_back(wheel_);
+      }
+      break;
+  }
+  return ret;
+}
+
+auto DeviceFactory::createFeedbacks()
+    -> std::vector<std::shared_ptr<IFeedbackDevice>> {
+  return {std::make_shared<Haptics>(services_->haptics())};
+}
+
+}  // namespace input
diff --git a/src/input/feedback_haptics.cpp b/src/input/feedback_haptics.cpp
new file mode 100644
index 00000000..5e83d0d6
--- /dev/null
+++ b/src/input/feedback_haptics.cpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "feedback_haptics.hpp"
+
+#include <cstdint>
+
+#include "lvgl/lvgl.h"
+
+#include "core/lv_event.h"
+#include "esp_log.h"
+
+#include "haptics.hpp"
+
+namespace input {
+
+using Effect = drivers::Haptics::Effect;
+
+Haptics::Haptics(drivers::Haptics& haptics_) : haptics_(haptics_) {}
+
+auto Haptics::feedback(uint8_t event_type) -> void {
+  switch (event_type) {
+    case LV_EVENT_FOCUSED:
+      haptics_.PlayWaveformEffect(Effect::kMediumClick1_100Pct);
+      break;
+    case LV_EVENT_CLICKED:
+      haptics_.PlayWaveformEffect(Effect::kSharpClick_100Pct);
+      break;
+    default:
+      break;
+  }
+}
+
+}  // namespace input
diff --git a/src/input/include/device_factory.hpp b/src/input/include/device_factory.hpp
new file mode 100644
index 00000000..dd9c7133
--- /dev/null
+++ b/src/input/include/device_factory.hpp
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <cstdint>
+#include <memory>
+
+#include "feedback_device.hpp"
+#include "input_device.hpp"
+#include "input_touch_wheel.hpp"
+#include "nvs.hpp"
+#include "service_locator.hpp"
+
+namespace input {
+
+class DeviceFactory {
+ public:
+  DeviceFactory(std::shared_ptr<system_fsm::ServiceLocator>);
+
+  auto createInputs(drivers::NvsStorage::InputModes mode)
+      -> std::vector<std::shared_ptr<IInputDevice>>;
+
+  auto createFeedbacks() -> std::vector<std::shared_ptr<IFeedbackDevice>>;
+
+  auto touch_wheel() -> std::shared_ptr<TouchWheel> { return wheel_; }
+
+ private:
+  std::shared_ptr<system_fsm::ServiceLocator> services_;
+
+  // HACK: the touchwheel is current a special case, since it's the only input
+  // device that has some kind of setting/configuration; scroll sensitivity.
+  std::shared_ptr<TouchWheel> wheel_;
+};
+
+}  // namespace input
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..5fc3e066
--- /dev/null
+++ b/src/input/include/input_device.hpp
@@ -0,0 +1,39 @@
+/*
+ * 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"
+#include "property.hpp"
+
+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?)
+
+  virtual auto settings()
+      -> std::vector<std::pair<std::string, lua::Property>> {
+    return {};
+  }
+};
+
+}  // namespace input
diff --git a/src/input/include/input_nav_buttons.hpp b/src/input/include/input_nav_buttons.hpp
new file mode 100644
index 00000000..29a19a16
--- /dev/null
+++ b/src/input/include/input_nav_buttons.hpp
@@ -0,0 +1,34 @@
+/*
+ * 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 "input_trigger.hpp"
+#include "touchwheel.hpp"
+
+namespace input {
+
+class NavButtons : public IInputDevice {
+ public:
+  NavButtons(drivers::IGpios&);
+
+  auto read(lv_indev_data_t* data) -> void override;
+
+ private:
+  drivers::IGpios& gpios_;
+
+  Trigger up_;
+  Trigger down_;
+};
+
+}  // 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..03936acb
--- /dev/null
+++ b/src/input/include/input_touch_dpad.hpp
@@ -0,0 +1,36 @@
+/*
+ * 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 "input_trigger.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_;
+
+  Trigger up_;
+  Trigger right_;
+  Trigger down_;
+  Trigger left_;
+};
+
+}  // 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..c81cbb1a
--- /dev/null
+++ b/src/input/include/input_touch_wheel.hpp
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <sys/_stdint.h>
+#include <cstdint>
+
+#include "hal/lv_hal_indev.h"
+
+#include "haptics.hpp"
+#include "input_device.hpp"
+#include "input_trigger.hpp"
+#include "nvs.hpp"
+#include "property.hpp"
+#include "touchwheel.hpp"
+
+namespace input {
+
+class TouchWheel : public IInputDevice {
+ public:
+  TouchWheel(drivers::NvsStorage&, drivers::TouchWheel&);
+
+  auto read(lv_indev_data_t* data) -> void override;
+
+  auto sensitivity() -> lua::Property&;
+
+ private:
+  auto calculateTicks(const drivers::TouchWheelData& data) -> int8_t;
+  auto calculateThreshold(uint8_t sensitivity) -> uint8_t;
+
+  drivers::NvsStorage& nvs_;
+  drivers::TouchWheel& wheel_;
+
+  lua::Property sensitivity_;
+
+  Trigger up_;
+  Trigger right_;
+  Trigger down_;
+  Trigger left_;
+
+  bool is_scrolling_;
+  uint8_t threshold_;
+  bool is_first_read_;
+  uint8_t last_angle_;
+};
+
+}  // namespace input
diff --git a/src/input/include/input_trigger.hpp b/src/input/include/input_trigger.hpp
new file mode 100644
index 00000000..599b796b
--- /dev/null
+++ b/src/input/include/input_trigger.hpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <cstdint>
+#include <optional>
+
+#include "hal/lv_hal_indev.h"
+
+namespace input {
+
+const uint16_t kLongPressDelayMs = LV_INDEV_DEF_LONG_PRESS_TIME;
+const uint16_t kRepeatDelayMs = LV_INDEV_DEF_LONG_PRESS_REP_TIME;
+
+class Trigger {
+ public:
+  enum class State {
+    kNone,
+    kClick,
+    kLongPress,
+    kRepeatPress,
+  };
+
+  Trigger();
+
+  auto update(bool is_pressed) -> State;
+
+ private:
+  std::optional<uint64_t> touch_time_ms_;
+  uint16_t times_fired_;
+};
+
+}  // 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..162ca8d9
--- /dev/null
+++ b/src/input/include/input_volume_buttons.hpp
@@ -0,0 +1,34 @@
+/*
+ * 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 "input_trigger.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_;
+
+  Trigger up_;
+  Trigger down_;
+};
+
+}  // 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..257ccb28
--- /dev/null
+++ b/src/input/include/lvgl_input_driver.hpp
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <cstdint>
+#include <deque>
+#include <memory>
+#include <set>
+
+#include "core/lv_group.h"
+#include "device_factory.hpp"
+#include "feedback_device.hpp"
+#include "gpios.hpp"
+#include "hal/lv_hal_indev.h"
+
+#include "input_device.hpp"
+#include "nvs.hpp"
+#include "property.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(drivers::NvsStorage& nvs, DeviceFactory&);
+
+  auto mode() -> lua::Property& { return mode_; }
+
+  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:
+  drivers::NvsStorage& nvs_;
+  DeviceFactory& factory_;
+
+  lua::Property mode_;
+  lv_indev_drv_t driver_;
+  lv_indev_t* registration_;
+
+  std::vector<std::shared_ptr<IInputDevice>> inputs_;
+  std::vector<std::shared_ptr<IFeedbackDevice>> feedbacks_;
+
+  bool is_locked_;
+};
+
+}  // namespace input
diff --git a/src/input/input_nav_buttons.cpp b/src/input/input_nav_buttons.cpp
new file mode 100644
index 00000000..d83568c8
--- /dev/null
+++ b/src/input/input_nav_buttons.cpp
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "input_nav_buttons.hpp"
+
+#include "event_queue.hpp"
+#include "gpios.hpp"
+#include "hal/lv_hal_indev.h"
+
+namespace input {
+
+NavButtons::NavButtons(drivers::IGpios& gpios) : gpios_(gpios) {}
+
+auto NavButtons::read(lv_indev_data_t* data) -> void {
+  bool vol_up = gpios_.Get(drivers::IGpios::Pin::kKeyUp);
+  switch (up_.update(!vol_up)) {
+    case Trigger::State::kClick:
+      data->enc_diff = -1;
+      break;
+    case Trigger::State::kLongPress:
+      events::Ui().Dispatch(ui::internal::BackPressed{});
+      break;
+    default:
+      break;
+  }
+
+  bool vol_down = gpios_.Get(drivers::IGpios::Pin::kKeyDown);
+  switch (down_.update(!vol_down)) {
+    case Trigger::State::kClick:
+      data->enc_diff = 1;
+      break;
+    case Trigger::State::kLongPress:
+      data->state = LV_INDEV_STATE_PRESSED;
+      break;
+    default:
+      data->state = LV_INDEV_STATE_RELEASED;
+      break;
+  }
+}
+
+}  // namespace input
diff --git a/src/input/input_touch_dpad.cpp b/src/input/input_touch_dpad.cpp
new file mode 100644
index 00000000..828d6b59
--- /dev/null
+++ b/src/input/input_touch_dpad.cpp
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "input_touch_dpad.hpp"
+
+#include <cstdint>
+
+#include "hal/lv_hal_indev.h"
+
+#include "event_queue.hpp"
+#include "haptics.hpp"
+#include "input_device.hpp"
+#include "input_touch_dpad.hpp"
+#include "touchwheel.hpp"
+
+namespace input {
+
+static inline auto IsAngleWithin(int16_t wheel_angle,
+                                 int16_t target_angle,
+                                 int threshold) -> bool {
+  int16_t difference = (wheel_angle - target_angle + 127 + 255) % 255 - 127;
+  return difference <= threshold && difference >= -threshold;
+}
+
+TouchDPad::TouchDPad(drivers::TouchWheel& wheel) : wheel_(wheel) {}
+
+auto TouchDPad::read(lv_indev_data_t* data) -> void {
+  wheel_.Update();
+  auto wheel_data = wheel_.GetTouchWheelData();
+
+  if (wheel_data.is_button_touched) {
+    data->state = LV_INDEV_STATE_PRESSED;
+  } else {
+    data->state = LV_INDEV_STATE_RELEASED;
+  }
+
+  switch (up_.update(
+      wheel_data.is_wheel_touched &&
+      drivers::TouchWheel::isAngleWithin(wheel_data.wheel_position, 0, 32))) {
+    case Trigger::State::kNone:
+      break;
+    default:
+      data->enc_diff = -1;
+      break;
+  }
+  switch (right_.update(
+      wheel_data.is_wheel_touched &&
+      drivers::TouchWheel::isAngleWithin(wheel_data.wheel_position, 192, 32))) {
+    default:
+      break;
+  }
+  switch (down_.update(
+      wheel_data.is_wheel_touched &&
+      drivers::TouchWheel::isAngleWithin(wheel_data.wheel_position, 128, 32))) {
+    case Trigger::State::kNone:
+      break;
+    default:
+      data->enc_diff = 1;
+      break;
+  }
+  switch (left_.update(
+      wheel_data.is_wheel_touched &&
+      drivers::TouchWheel::isAngleWithin(wheel_data.wheel_position, 64, 32))) {
+    case Trigger::State::kLongPress:
+      events::Ui().Dispatch(ui::internal::BackPressed{});
+      break;
+    default:
+      break;
+  }
+}
+
+}  // namespace input
diff --git a/src/input/input_touch_wheel.cpp b/src/input/input_touch_wheel.cpp
new file mode 100644
index 00000000..7670e342
--- /dev/null
+++ b/src/input/input_touch_wheel.cpp
@@ -0,0 +1,143 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "input_touch_wheel.hpp"
+#include <stdint.h>
+
+#include <cstdint>
+#include <variant>
+
+#include "event_queue.hpp"
+#include "hal/lv_hal_indev.h"
+
+#include "haptics.hpp"
+#include "input_device.hpp"
+#include "input_trigger.hpp"
+#include "nvs.hpp"
+#include "property.hpp"
+#include "touchwheel.hpp"
+#include "ui_events.hpp"
+
+namespace input {
+
+TouchWheel::TouchWheel(drivers::NvsStorage& nvs, drivers::TouchWheel& wheel)
+    : nvs_(nvs),
+      wheel_(wheel),
+      sensitivity_(static_cast<int>(nvs.ScrollSensitivity()),
+                   [&](const lua::LuaValue& val) {
+                     if (!std::holds_alternative<int>(val)) {
+                       return false;
+                     }
+                     int int_val = std::get<int>(val);
+                     if (int_val < 0 || int_val > UINT8_MAX) {
+                       return false;
+                     }
+                     nvs.ScrollSensitivity(int_val);
+                     threshold_ = calculateThreshold(int_val);
+                     return true;
+                   }),
+      is_scrolling_(false),
+      threshold_(calculateThreshold(nvs.ScrollSensitivity())),
+      is_first_read_(true),
+      last_angle_(0) {}
+
+auto TouchWheel::read(lv_indev_data_t* data) -> void {
+  wheel_.Update();
+  auto wheel_data = wheel_.GetTouchWheelData();
+  int8_t ticks = calculateTicks(wheel_data);
+
+  if (!wheel_data.is_wheel_touched) {
+    // User has released the wheel.
+    is_scrolling_ = false;
+    data->enc_diff = 0;
+  } else if (ticks != 0) {
+    // User is touching the wheel, and has just passed the sensitivity
+    // threshold for a scroll tick.
+    is_scrolling_ = true;
+    data->enc_diff = ticks;
+  } else {
+    // User is touching the wheel, but hasn't moved.
+    data->enc_diff = 0;
+  }
+
+  if (!is_scrolling_ && wheel_data.is_button_touched) {
+    data->state = LV_INDEV_STATE_PRESSED;
+  } else {
+    data->state = LV_INDEV_STATE_RELEASED;
+  }
+
+  // If the user is touching the wheel but not scrolling, then they may be
+  // clicking on one of the wheel's cardinal directions.
+  bool pressing = wheel_data.is_wheel_touched && !is_scrolling_;
+
+  switch (up_.update(pressing && drivers::TouchWheel::isAngleWithin(
+                                     wheel_data.wheel_position, 0, 32))) {
+    case Trigger::State::kLongPress:
+      data->enc_diff = INT16_MIN;
+      break;
+    default:
+      break;
+  }
+  switch (right_.update(pressing && drivers::TouchWheel::isAngleWithin(
+                                        wheel_data.wheel_position, 192, 32))) {
+    default:
+      break;
+  }
+  switch (down_.update(pressing && drivers::TouchWheel::isAngleWithin(
+                                       wheel_data.wheel_position, 128, 32))) {
+    case Trigger::State::kLongPress:
+      data->enc_diff = INT16_MAX;
+      break;
+    default:
+      break;
+  }
+  switch (left_.update(pressing && drivers::TouchWheel::isAngleWithin(
+                                       wheel_data.wheel_position, 64, 32))) {
+    case Trigger::State::kLongPress:
+      events::Ui().Dispatch(ui::internal::BackPressed{});
+      break;
+    default:
+      break;
+  }
+}
+
+auto TouchWheel::sensitivity() -> lua::Property& {
+  return sensitivity_;
+}
+
+auto TouchWheel::calculateTicks(const drivers::TouchWheelData& data) -> int8_t {
+  if (!data.is_wheel_touched) {
+    is_first_read_ = true;
+    return 0;
+  }
+
+  uint8_t new_angle = data.wheel_position;
+  if (is_first_read_) {
+    is_first_read_ = false;
+    last_angle_ = new_angle;
+    return 0;
+  }
+
+  int delta = 128 - last_angle_;
+  uint8_t rotated_angle = new_angle + delta;
+  if (rotated_angle < 128 - threshold_) {
+    last_angle_ = new_angle;
+    return 1;
+  } else if (rotated_angle > 128 + threshold_) {
+    last_angle_ = new_angle;
+    return -1;
+  } else {
+    return 0;
+  }
+}
+
+auto TouchWheel::calculateThreshold(uint8_t sensitivity) -> uint8_t {
+  int tmax = 35;
+  int tmin = 5;
+  return (((255. - sensitivity) / 255.) * (tmax - tmin) + tmin);
+}
+
+}  // namespace input
diff --git a/src/input/input_trigger.cpp b/src/input/input_trigger.cpp
new file mode 100644
index 00000000..9485ecb4
--- /dev/null
+++ b/src/input/input_trigger.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "input_trigger.hpp"
+#include <sys/_stdint.h>
+
+#include <cstdint>
+#include "esp_log.h"
+#include "esp_timer.h"
+
+namespace input {
+
+Trigger::Trigger() : touch_time_ms_(), times_fired_(0) {}
+
+auto Trigger::update(bool is_pressed) -> State {
+  // Bail out early if we're in a steady-state of not pressed.
+  if (!is_pressed && !touch_time_ms_) {
+    return State::kNone;
+  }
+
+  uint64_t now_ms = esp_timer_get_time() / 1000;
+
+  // Initial press of this key: record the current time, and report that we
+  // haven't triggered yet.
+  if (is_pressed && !touch_time_ms_) {
+    touch_time_ms_ = now_ms;
+    times_fired_ = 0;
+    return State::kNone;
+  }
+
+  // The key was released. If there were no long-press events fired during the
+  // press, then this was a standard click.
+  if (!is_pressed && touch_time_ms_) {
+    touch_time_ms_.reset();
+    if (times_fired_ == 0) {
+      return State::kClick;
+    } else {
+      return State::kNone;
+    }
+  }
+
+  // Now the more complicated case: the user is continuing to press the button.
+  if (times_fired_ == 0) {
+    // We haven't fired yet, so we wait for the long-press event.
+    if (now_ms - *touch_time_ms_ >= kLongPressDelayMs) {
+      times_fired_++;
+      return State::kLongPress;
+    }
+  } else {
+    // We've already fired at least once. How long has the user been holding
+    // the key for?
+    uint64_t time_since_long_press =
+        now_ms - (*touch_time_ms_ + kLongPressDelayMs);
+
+    // How many times should we have fired?
+    // 1 initial fire (for the long-press), plus one additional fire every
+    // kRepeatDelayMs since the long-press event.
+    uint16_t expected_times_fired =
+        1 + (time_since_long_press / kRepeatDelayMs);
+    if (times_fired_ < expected_times_fired) {
+      times_fired_++;
+      return State::kRepeatPress;
+    }
+  }
+
+  return State::kNone;
+}
+
+}  // namespace input
diff --git a/src/input/input_volume_buttons.cpp b/src/input/input_volume_buttons.cpp
new file mode 100644
index 00000000..0413222c
--- /dev/null
+++ b/src/input/input_volume_buttons.cpp
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2024 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "input_volume_buttons.hpp"
+#include "event_queue.hpp"
+#include "gpios.hpp"
+
+namespace input {
+
+VolumeButtons::VolumeButtons(drivers::IGpios& gpios) : gpios_(gpios) {}
+
+auto VolumeButtons::read(lv_indev_data_t* data) -> void {
+  bool vol_up = gpios_.Get(drivers::IGpios::Pin::kKeyUp);
+  switch (up_.update(!vol_up)) {
+    case Trigger::State::kNone:
+      break;
+    default:
+      events::Audio().Dispatch(audio::StepUpVolume{});
+      break;
+  }
+
+  bool vol_down = gpios_.Get(drivers::IGpios::Pin::kKeyDown);
+  switch (down_.update(!vol_down)) {
+    case Trigger::State::kNone:
+      break;
+    default:
+      events::Audio().Dispatch(audio::StepDownVolume{});
+      break;
+  }
+}
+
+}  // namespace input
diff --git a/src/input/lvgl_input_driver.cpp b/src/input/lvgl_input_driver.cpp
new file mode 100644
index 00000000..9698aa79
--- /dev/null
+++ b/src/input/lvgl_input_driver.cpp
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "lvgl_input_driver.hpp"
+#include <stdint.h>
+
+#include <cstdint>
+#include <memory>
+#include <variant>
+
+#include "device_factory.hpp"
+#include "feedback_haptics.hpp"
+#include "input_touch_wheel.hpp"
+#include "input_trigger.hpp"
+#include "input_volume_buttons.hpp"
+#include "lvgl.h"
+#include "nvs.hpp"
+#include "property.hpp"
+
+[[maybe_unused]] static constexpr char kTag[] = "input";
+
+namespace input {
+
+static void read_cb(lv_indev_drv_t* drv, lv_indev_data_t* data) {
+  LvglInputDriver* instance =
+      reinterpret_cast<LvglInputDriver*>(drv->user_data);
+  instance->read(data);
+}
+
+static void feedback_cb(lv_indev_drv_t* drv, uint8_t event) {
+  LvglInputDriver* instance =
+      reinterpret_cast<LvglInputDriver*>(drv->user_data);
+  instance->feedback(event);
+}
+
+auto intToMode(int raw) -> std::optional<drivers::NvsStorage::InputModes> {
+  switch (raw) {
+    case 0:
+      return drivers::NvsStorage::InputModes::kButtonsOnly;
+    case 1:
+      return drivers::NvsStorage::InputModes::kButtonsWithWheel;
+    case 2:
+      return drivers::NvsStorage::InputModes::kDirectionalWheel;
+    case 3:
+      return drivers::NvsStorage::InputModes::kRotatingWheel;
+    default:
+      return {};
+  }
+}
+
+LvglInputDriver::LvglInputDriver(drivers::NvsStorage& nvs,
+                                 DeviceFactory& factory)
+    : nvs_(nvs),
+      factory_(factory),
+      mode_(static_cast<int>(nvs.PrimaryInput()),
+            [&](const lua::LuaValue& val) {
+              if (!std::holds_alternative<int>(val)) {
+                return false;
+              }
+              auto mode = intToMode(std::get<int>(val));
+              if (!mode) {
+                return false;
+              }
+              nvs.PrimaryInput(*mode);
+              inputs_ = factory.createInputs(*mode);
+              return true;
+            }),
+      driver_(),
+      registration_(nullptr),
+      inputs_(factory.createInputs(nvs.PrimaryInput())),
+      feedbacks_(factory.createFeedbacks()),
+      is_locked_(false) {
+  lv_indev_drv_init(&driver_);
+  driver_.type = LV_INDEV_TYPE_ENCODER;
+  driver_.read_cb = read_cb;
+  driver_.feedback_cb = feedback_cb;
+  driver_.user_data = this;
+  driver_.long_press_time = kLongPressDelayMs;
+  driver_.long_press_repeat_time = kRepeatDelayMs;
+
+  registration_ = lv_indev_drv_register(&driver_);
+}
+
+auto LvglInputDriver::read(lv_indev_data_t* data) -> void {
+  // TODO: we should pass lock state on to the individual devices, since they
+  // may wish to either ignore the lock state, or power down until unlock.
+  if (is_locked_) {
+    return;
+  }
+  for (auto&& device : inputs_) {
+    device->read(data);
+  }
+}
+
+auto LvglInputDriver::feedback(uint8_t event) -> void {
+  if (is_locked_) {
+    return;
+  }
+  for (auto&& device : feedbacks_) {
+    device->feedback(event);
+  }
+}
+
+}  // namespace input
diff --git a/src/system_fsm/include/system_fsm.hpp b/src/system_fsm/include/system_fsm.hpp
index e0a0ac7a..f01afb3f 100644
--- a/src/system_fsm/include/system_fsm.hpp
+++ b/src/system_fsm/include/system_fsm.hpp
@@ -17,7 +17,6 @@
 #include "display.hpp"
 #include "gpios.hpp"
 #include "nvs.hpp"
-#include "relative_wheel.hpp"
 #include "samd.hpp"
 #include "service_locator.hpp"
 #include "storage.hpp"
diff --git a/src/system_fsm/system_fsm.cpp b/src/system_fsm/system_fsm.cpp
index f502b49a..59d41c73 100644
--- a/src/system_fsm/system_fsm.cpp
+++ b/src/system_fsm/system_fsm.cpp
@@ -9,7 +9,6 @@
 #include "driver/gpio.h"
 #include "event_queue.hpp"
 #include "gpios.hpp"
-#include "relative_wheel.hpp"
 #include "service_locator.hpp"
 #include "system_events.hpp"
 #include "tag_parser.hpp"
diff --git a/src/ui/CMakeLists.txt b/src/ui/CMakeLists.txt
index 6d45fc9f..3814e9d5 100644
--- a/src/ui/CMakeLists.txt
+++ b/src/ui/CMakeLists.txt
@@ -3,9 +3,9 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
 idf_component_register(
-  SRCS "lvgl_task.cpp" "ui_fsm.cpp" "screen_splash.cpp" "encoder_input.cpp"
-  "themes.cpp" "screen.cpp" "modal.cpp"  "screen_lua.cpp"
-  "splash.c" "font_fusion_12.c" "font_fusion_10.c"
+  SRCS "lvgl_task.cpp" "ui_fsm.cpp" "screen_splash.cpp" "themes.cpp"
+  "screen.cpp" "modal.cpp"  "screen_lua.cpp" "splash.c" "font_fusion_12.c"
+  "font_fusion_10.c"
   INCLUDE_DIRS "include"
-  REQUIRES "drivers" "lvgl" "tinyfsm" "events" "system_fsm" "database" "esp_timer" "battery" "lua" "luavgl" "esp_app_format")
+  REQUIRES "drivers" "lvgl" "tinyfsm" "events" "system_fsm" "database" "esp_timer" "battery" "lua" "luavgl" "esp_app_format" "input")
 target_compile_options(${COMPONENT_LIB} PRIVATE ${EXTRA_WARNINGS})
diff --git a/src/ui/encoder_input.cpp b/src/ui/encoder_input.cpp
deleted file mode 100644
index 3b5af2c1..00000000
--- a/src/ui/encoder_input.cpp
+++ /dev/null
@@ -1,358 +0,0 @@
-/*
- * Copyright 2023 jacqueline <me@jacqueline.id.au>
- *
- * SPDX-License-Identifier: GPL-3.0-only
- */
-
-#include "encoder_input.hpp"
-
-#include <sys/_stdint.h>
-#include <memory>
-
-#include "lvgl.h"
-
-#include "audio_events.hpp"
-#include "core/lv_event.h"
-#include "core/lv_group.h"
-#include "esp_timer.h"
-#include "event_queue.hpp"
-#include "gpios.hpp"
-#include "hal/lv_hal_indev.h"
-#include "nvs.hpp"
-#include "relative_wheel.hpp"
-#include "touchwheel.hpp"
-#include "ui_events.hpp"
-
-[[maybe_unused]] static constexpr char kTag[] = "input";
-
-constexpr int kDPadAngleThreshold = 10;
-constexpr int kLongPressDelayMs = 500;
-constexpr int kRepeatDelayMs = 250;
-
-static inline auto IsAngleWithin(int16_t wheel_angle,
-                                 int16_t target_angle,
-                                 int threshold) -> bool {
-  int16_t difference = (wheel_angle - target_angle + 127 + 255) % 255 - 127;
-  return difference <= threshold && difference >= -threshold;
-}
-
-namespace ui {
-
-static void encoder_read(lv_indev_drv_t* drv, lv_indev_data_t* data) {
-  EncoderInput* instance = reinterpret_cast<EncoderInput*>(drv->user_data);
-  instance->Read(data);
-}
-
-EncoderInput::EncoderInput(drivers::IGpios& gpios, drivers::TouchWheel& wheel)
-    : gpios_(gpios),
-      raw_wheel_(wheel),
-      relative_wheel_(std::make_unique<drivers::RelativeWheel>(wheel)),
-      scroller_(std::make_unique<Scroller>()),
-      mode_(drivers::NvsStorage::InputModes::kRotatingWheel),
-      is_locked_(false),
-      scroll_sensitivity_(10),
-      is_scrolling_wheel_(false) {
-  lv_indev_drv_init(&driver_);
-  driver_.type = LV_INDEV_TYPE_ENCODER;
-  driver_.read_cb = encoder_read;
-  driver_.user_data = this;
-
-  registration_ = lv_indev_drv_register(&driver_);
-}
-
-auto EncoderInput::Read(lv_indev_data_t* data) -> void {
-  if (is_locked_) {
-    return;
-  }
-
-  lv_obj_t* active_object = nullptr;
-  if (registration_ && registration_->group) {
-    active_object = lv_group_get_focused(registration_->group);
-  }
-
-  raw_wheel_.Update();
-  relative_wheel_->Update();
-  // GPIO (for volume buttons) updating is handled by system_fsm.
-
-  uint64_t now_ms = esp_timer_get_time() / 1000;
-
-  // Deal with the potential overflow of our timer.
-  for (auto& it : touch_time_ms_) {
-    if (it.second > now_ms) {
-      // esp_timer overflowed.
-      it.second = 0;
-    }
-  }
-
-  // Check each button.
-  UpdateKeyState(Keys::kVolumeUp, now_ms,
-                 !gpios_.Get(drivers::IGpios::Pin::kKeyUp));
-  UpdateKeyState(Keys::kVolumeDown, now_ms,
-                 !gpios_.Get(drivers::IGpios::Pin::kKeyDown));
-
-  drivers::TouchWheelData wheel_data = raw_wheel_.GetTouchWheelData();
-  UpdateKeyState(Keys::kTouchWheel, now_ms, wheel_data.is_wheel_touched);
-  UpdateKeyState(Keys::kTouchWheelCenter, now_ms, wheel_data.is_button_touched);
-
-  UpdateKeyState(
-      Keys::kDirectionalUp, now_ms,
-      wheel_data.is_wheel_touched &&
-          IsAngleWithin(wheel_data.wheel_position, 0, kDPadAngleThreshold));
-  UpdateKeyState(
-      Keys::kDirectionalLeft, now_ms,
-      wheel_data.is_wheel_touched &&
-          IsAngleWithin(wheel_data.wheel_position, 63, kDPadAngleThreshold));
-  UpdateKeyState(
-      Keys::kDirectionalDown, now_ms,
-      wheel_data.is_wheel_touched &&
-          IsAngleWithin(wheel_data.wheel_position, 127, kDPadAngleThreshold));
-  UpdateKeyState(
-      Keys::kDirectionalRight, now_ms,
-      wheel_data.is_wheel_touched &&
-          IsAngleWithin(wheel_data.wheel_position, 189, kDPadAngleThreshold));
-
-  // When the wheel is being scrolled, we want to ensure that other inputs
-  // involving the touchwheel don't trigger. This guards again two main issues:
-  //  - hesitating when your thumb is on a cardinal direction, causing an
-  //    unintentional long-press,
-  //  - drifting from the outside of the wheel in a way that causes the centre
-  //    key to be triggered.
-  if (is_scrolling_wheel_) {
-    UpdateKeyState(Keys::kTouchWheelCenter, now_ms, false);
-    UpdateKeyState(Keys::kDirectionalUp, now_ms, false);
-    UpdateKeyState(Keys::kDirectionalLeft, now_ms, false);
-    UpdateKeyState(Keys::kDirectionalDown, now_ms, false);
-    UpdateKeyState(Keys::kDirectionalRight, now_ms, false);
-  }
-
-  // Now that we've determined the correct state for all keys, we can start
-  // mapping key states into actions, depending on the current control scheme.
-  if (mode_ == drivers::NvsStorage::InputModes::kButtonsOnly) {
-    Trigger trigger;
-    data->state = LV_INDEV_STATE_RELEASED;
-
-    trigger = TriggerKey(Keys::kVolumeUp, KeyStyle::kLongPress, now_ms);
-    switch (trigger) {
-      case Trigger::kNone:
-        break;
-      case Trigger::kClick:
-        data->enc_diff = -1;
-        break;
-      case Trigger::kLongPress:
-        events::Ui().Dispatch(internal::BackPressed{});
-        break;
-    }
-
-    trigger = TriggerKey(Keys::kVolumeDown, KeyStyle::kLongPress, now_ms);
-    switch (trigger) {
-      case Trigger::kNone:
-        break;
-      case Trigger::kClick:
-        data->enc_diff = 1;
-        break;
-      case Trigger::kLongPress:
-        data->state = LV_INDEV_STATE_PRESSED;
-        break;
-    }
-  } else if (mode_ == drivers::NvsStorage::InputModes::kDirectionalWheel) {
-    Trigger trigger;
-    trigger = TriggerKey(Keys::kTouchWheelCenter, KeyStyle::kLongPress, now_ms);
-    data->state = trigger == Trigger::kClick ? LV_INDEV_STATE_PRESSED
-                                             : LV_INDEV_STATE_RELEASED;
-
-    trigger = TriggerKey(Keys::kDirectionalUp, KeyStyle::kRepeat, now_ms);
-    if (trigger == Trigger::kClick) {
-      data->enc_diff = scroller_->AddInput(now_ms, -1);
-    }
-
-    trigger = TriggerKey(Keys::kDirectionalDown, KeyStyle::kRepeat, now_ms);
-    if (trigger == Trigger::kClick) {
-      data->enc_diff = scroller_->AddInput(now_ms, 1);
-    }
-
-    trigger = TriggerKey(Keys::kDirectionalLeft, KeyStyle::kRepeat, now_ms);
-    if (trigger == Trigger::kClick) {
-      events::Ui().Dispatch(internal::BackPressed{});
-    }
-
-    trigger = TriggerKey(Keys::kDirectionalRight, KeyStyle::kRepeat, now_ms);
-    if (trigger == Trigger::kClick) {
-      // TODO: ???
-    }
-
-    // Cancel scrolling if the touchpad is released.
-    if (!touch_time_ms_.contains(Keys::kDirectionalUp) &&
-        !touch_time_ms_.contains(Keys::kDirectionalDown)) {
-      data->enc_diff = scroller_->AddInput(now_ms, 0);
-    }
-
-    trigger = TriggerKey(Keys::kVolumeUp, KeyStyle::kRepeat, now_ms);
-    switch (trigger) {
-      case Trigger::kNone:
-        break;
-      case Trigger::kClick:
-        events::Audio().Dispatch(audio::StepUpVolume{});
-        break;
-      case Trigger::kLongPress:
-        break;
-    }
-
-    trigger = TriggerKey(Keys::kVolumeDown, KeyStyle::kRepeat, now_ms);
-    switch (trigger) {
-      case Trigger::kNone:
-        break;
-      case Trigger::kClick:
-        events::Audio().Dispatch(audio::StepDownVolume{});
-        break;
-      case Trigger::kLongPress:
-        break;
-    }
-  } else if (mode_ == drivers::NvsStorage::InputModes::kRotatingWheel) {
-    if (!raw_wheel_.GetTouchWheelData().is_wheel_touched) {
-      // User has released the wheel.
-      is_scrolling_wheel_ = false;
-      data->enc_diff = scroller_->AddInput(now_ms, 0);
-    } else if (relative_wheel_->ticks() != 0) {
-      // User is touching the wheel, and has just passed the sensitivity
-      // threshold for a scroll tick.
-      is_scrolling_wheel_ = true;
-      data->enc_diff = scroller_->AddInput(now_ms, relative_wheel_->ticks());
-    } else {
-      // User is touching the wheel, but hasn't moved.
-      data->enc_diff = 0;
-    }
-
-    Trigger trigger =
-        TriggerKey(Keys::kTouchWheelCenter, KeyStyle::kLongPress, now_ms);
-    switch (trigger) {
-      case Trigger::kNone:
-        data->state = LV_INDEV_STATE_RELEASED;
-        break;
-      case Trigger::kClick:
-        data->state = LV_INDEV_STATE_PRESSED;
-        break;
-      case Trigger::kLongPress:
-        if (active_object) {
-          lv_event_send(active_object, LV_EVENT_LONG_PRESSED, NULL);
-        }
-        break;
-    }
-
-    trigger = TriggerKey(Keys::kVolumeUp, KeyStyle::kRepeat, now_ms);
-    switch (trigger) {
-      case Trigger::kNone:
-        break;
-      case Trigger::kClick:
-        events::Audio().Dispatch(audio::StepUpVolume{});
-        break;
-      case Trigger::kLongPress:
-        break;
-    }
-
-    trigger = TriggerKey(Keys::kVolumeDown, KeyStyle::kRepeat, now_ms);
-    switch (trigger) {
-      case Trigger::kNone:
-        break;
-      case Trigger::kClick:
-        events::Audio().Dispatch(audio::StepDownVolume{});
-        break;
-      case Trigger::kLongPress:
-        break;
-    }
-
-    trigger = TriggerKey(Keys::kDirectionalLeft, KeyStyle::kLongPress, now_ms);
-    switch (trigger) {
-      case Trigger::kNone:
-        break;
-      case Trigger::kClick:
-        break;
-      case Trigger::kLongPress:
-        events::Ui().Dispatch(internal::BackPressed{});
-        break;
-    }
-  }
-}
-
-auto EncoderInput::scroll_sensitivity(uint8_t val) -> void {
-  scroll_sensitivity_ = val;
-  relative_wheel_->SetSensitivity(scroll_sensitivity_);
-}
-
-auto EncoderInput::UpdateKeyState(Keys key, uint64_t ms, bool clicked) -> void {
-  if (clicked) {
-    if (!touch_time_ms_.contains(key)) {
-      // Key was just clicked.
-      touch_time_ms_[key] = ms;
-      just_released_.erase(key);
-      fired_.erase(key);
-    }
-    return;
-  }
-
-  // Key is not clicked.
-  if (touch_time_ms_.contains(key)) {
-    // Key was just released.
-    just_released_.insert(key);
-    touch_time_ms_.erase(key);
-  }
-}
-
-auto EncoderInput::TriggerKey(Keys key, KeyStyle s, uint64_t ms) -> Trigger {
-  if (s == KeyStyle::kRepeat) {
-    bool may_repeat = fired_.contains(key) && touch_time_ms_.contains(key) &&
-                      ms - touch_time_ms_[key] >= kRepeatDelayMs;
-
-    // Repeatable keys trigger on press.
-    if (touch_time_ms_.contains(key) && (!fired_.contains(key) || may_repeat)) {
-      fired_.insert(key);
-      return Trigger::kClick;
-    } else {
-      return Trigger::kNone;
-    }
-  } else if (s == KeyStyle::kLongPress) {
-    // Long press keys trigger on release, or after holding for a delay.
-    if (just_released_.contains(key)) {
-      just_released_.erase(key);
-      if (!fired_.contains(key)) {
-        fired_.insert(key);
-        return Trigger::kClick;
-      }
-    }
-    if (touch_time_ms_.contains(key) &&
-        ms - touch_time_ms_[key] >= kLongPressDelayMs &&
-        !fired_.contains(key)) {
-      fired_.insert(key);
-      return Trigger::kLongPress;
-    }
-  }
-
-  return Trigger::kNone;
-}
-
-auto Scroller::AddInput(uint64_t ms, int direction) -> int {
-  bool dir_changed =
-      ((velocity_ < 0 && direction > 0) || (velocity_ > 0 && direction < 0));
-  if (direction == 0 || dir_changed) {
-    last_input_ms_ = ms;
-    velocity_ = 0;
-    return 0;
-  }
-  // Decay with time
-  if (last_input_ms_ > ms) {
-    last_input_ms_ = 0;
-  }
-  uint diff = ms - last_input_ms_;
-  uint diff_steps = diff / 25;
-  last_input_ms_ = ms + (last_input_ms_ % 50);
-  // Use powers of two for our exponential decay so we can implement decay
-  // trivially via bit shifting.
-  velocity_ >>= diff_steps;
-
-  velocity_ += direction * 1000;
-  if (velocity_ > 0) {
-    return (velocity_ + 500) / 1000;
-  } else {
-    return (velocity_ - 500) / 1000;
-  }
-}
-}  // namespace ui
diff --git a/src/ui/include/encoder_input.hpp b/src/ui/include/encoder_input.hpp
deleted file mode 100644
index 7dfac071..00000000
--- a/src/ui/include/encoder_input.hpp
+++ /dev/null
@@ -1,107 +0,0 @@
-/*
- * 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 "gpios.hpp"
-#include "hal/lv_hal_indev.h"
-
-#include "nvs.hpp"
-#include "relative_wheel.hpp"
-#include "touchwheel.hpp"
-
-namespace ui {
-
-class Scroller;
-
-/*
- * Main input device abstracting that handles turning lower-level input device
- * drivers into events and LVGL inputs.
- *
- * As far as LVGL is concerned, this class represents an ordinary rotary
- * encoder, supporting only left and right ticks, and clicking.
- */
-class EncoderInput {
- public:
-  EncoderInput(drivers::IGpios& gpios, drivers::TouchWheel& wheel);
-
-  auto Read(lv_indev_data_t* data) -> void;
-  auto registration() -> lv_indev_t* { return registration_; }
-
-  auto mode(drivers::NvsStorage::InputModes mode) { mode_ = mode; }
-  auto scroll_sensitivity(uint8_t val) -> void; // Value between 0-255, used to scale the threshold
-  auto lock(bool l) -> void { is_locked_ = l; }
-
- private:
-  lv_indev_drv_t driver_;
-  lv_indev_t* registration_;
-
-  drivers::IGpios& gpios_;
-  drivers::TouchWheel& raw_wheel_;
-  std::unique_ptr<drivers::RelativeWheel> relative_wheel_;
-  std::unique_ptr<Scroller> scroller_;
-
-  drivers::NvsStorage::InputModes mode_;
-  bool is_locked_;
-  uint8_t scroll_sensitivity_;
-
-  // Every kind of distinct input that we could map to an action.
-  enum class Keys {
-    kVolumeUp,
-    kVolumeDown,
-    kTouchWheel,
-    kTouchWheelCenter,
-    kDirectionalUp,
-    kDirectionalRight,
-    kDirectionalDown,
-    kDirectionalLeft,
-  };
-
-  // Map from a Key, to the time that it was first touched in ms. If the key is
-  // currently released, where will be no entry.
-  std::unordered_map<Keys, uint64_t> touch_time_ms_;
-  // Set of keys that were released during the current update.
-  std::set<Keys> just_released_;
-  // Set of keys that have had an event fired for them since being pressed.
-  std::set<Keys> fired_;
-
-  bool is_scrolling_wheel_;
-
-  enum class Trigger {
-    kNone,
-    // Regular short-click. Triggered on release for long-pressable keys,
-    // triggered on the initial press for repeatable keys.
-    kClick,
-    kLongPress,
-  };
-
-  enum class KeyStyle {
-    kRepeat,
-    kLongPress,
-  };
-
-  auto UpdateKeyState(Keys key, uint64_t ms, bool clicked) -> void;
-  auto TriggerKey(Keys key, KeyStyle t, uint64_t ms) -> Trigger;
-};
-
-class Scroller {
- public:
-  Scroller() : last_input_ms_(0), velocity_(0) {}
-
-  auto AddInput(uint64_t, int) -> int;
-
- private:
-  uint64_t last_input_ms_;
-  int velocity_;
-};
-
-}  // namespace ui
diff --git a/src/ui/include/lvgl_task.hpp b/src/ui/include/lvgl_task.hpp
index f212ab9d..8efcbf35 100644
--- a/src/ui/include/lvgl_task.hpp
+++ b/src/ui/include/lvgl_task.hpp
@@ -15,8 +15,7 @@
 #include "freertos/timers.h"
 
 #include "display.hpp"
-#include "encoder_input.hpp"
-#include "relative_wheel.hpp"
+#include "lvgl_input_driver.hpp"
 #include "screen.hpp"
 #include "themes.hpp"
 #include "touchwheel.hpp"
@@ -28,14 +27,14 @@ class UiTask {
   static auto Start() -> UiTask*;
   ~UiTask();
 
-  auto input(std::shared_ptr<EncoderInput> input) -> void;
+  auto input(std::shared_ptr<input::LvglInputDriver> input) -> void;
 
  private:
   UiTask();
 
   auto Main() -> void;
 
-  std::shared_ptr<EncoderInput> input_;
+  std::shared_ptr<input::LvglInputDriver> input_;
   std::shared_ptr<Screen> current_screen_;
 };
 
diff --git a/src/ui/include/ui_events.hpp b/src/ui/include/ui_events.hpp
index 5c033b0c..81e0543a 100644
--- a/src/ui/include/ui_events.hpp
+++ b/src/ui/include/ui_events.hpp
@@ -32,7 +32,6 @@ struct DumpLuaStack : tinyfsm::Event {};
 
 namespace internal {
 
-struct ControlSchemeChanged : tinyfsm::Event {};
 struct ReindexDatabase : tinyfsm::Event {};
 
 struct BackPressed : tinyfsm::Event {};
diff --git a/src/ui/include/ui_fsm.hpp b/src/ui/include/ui_fsm.hpp
index 2bab487d..8eafc6e0 100644
--- a/src/ui/include/ui_fsm.hpp
+++ b/src/ui/include/ui_fsm.hpp
@@ -13,15 +13,18 @@
 #include "audio_events.hpp"
 #include "battery.hpp"
 #include "db_events.hpp"
+#include "device_factory.hpp"
 #include "display.hpp"
-#include "encoder_input.hpp"
+#include "feedback_haptics.hpp"
 #include "gpios.hpp"
+#include "input_touch_wheel.hpp"
+#include "input_volume_buttons.hpp"
 #include "lua_thread.hpp"
+#include "lvgl_input_driver.hpp"
 #include "lvgl_task.hpp"
 #include "modal.hpp"
 #include "nvs.hpp"
 #include "property.hpp"
-#include "relative_wheel.hpp"
 #include "screen.hpp"
 #include "service_locator.hpp"
 #include "storage.hpp"
@@ -68,7 +71,6 @@ class UiState : public tinyfsm::Fsm<UiState> {
   void react(const system_fsm::SamdUsbStatusChanged&);
 
   void react(const internal::DismissAlerts&);
-  void react(const internal::ControlSchemeChanged&);
 
   void react(const database::event::UpdateStarted&);
   void react(const database::event::UpdateProgress&){};
@@ -92,7 +94,9 @@ class UiState : public tinyfsm::Fsm<UiState> {
   static std::unique_ptr<UiTask> sTask;
   static std::shared_ptr<system_fsm::ServiceLocator> sServices;
   static std::unique_ptr<drivers::Display> sDisplay;
-  static std::shared_ptr<EncoderInput> sInput;
+
+  static std::shared_ptr<input::LvglInputDriver> sInput;
+  static std::unique_ptr<input::DeviceFactory> sDeviceFactory;
 
   static std::stack<std::shared_ptr<Screen>> sScreens;
   static std::shared_ptr<Screen> sCurrentScreen;
@@ -126,8 +130,6 @@ class UiState : public tinyfsm::Fsm<UiState> {
 
   static lua::Property sDisplayBrightness;
 
-  static lua::Property sControlsScheme;
-  static lua::Property sScrollSensitivity;
   static lua::Property sLockSwitch;
 
   static lua::Property sDatabaseUpdating;
diff --git a/src/ui/lvgl_task.cpp b/src/ui/lvgl_task.cpp
index f0184766..4cf25c15 100644
--- a/src/ui/lvgl_task.cpp
+++ b/src/ui/lvgl_task.cpp
@@ -33,11 +33,11 @@
 #include "lua.h"
 #include "lv_api_map.h"
 #include "lvgl/lvgl.h"
+#include "lvgl_input_driver.hpp"
 #include "misc/lv_color.h"
 #include "misc/lv_style.h"
 #include "misc/lv_timer.h"
 #include "modal.hpp"
-#include "relative_wheel.hpp"
 #include "tasks.hpp"
 #include "touchwheel.hpp"
 #include "ui_fsm.hpp"
@@ -50,8 +50,6 @@ namespace ui {
 
 [[maybe_unused]] static const char* kTag = "ui_task";
 
-static auto group_focus_cb(lv_group_t *group) -> void;
-
 UiTask::UiTask() {}
 
 UiTask::~UiTask() {
@@ -78,7 +76,6 @@ auto UiTask::Main() -> void {
     if (input_ && current_screen_->group() != current_group) {
       current_group = current_screen_->group();
       lv_indev_set_group(input_->registration(), current_group);
-      lv_group_set_focus_cb(current_group, &group_focus_cb);
     }
 
     TickType_t delay = lv_timer_handler();
@@ -86,10 +83,9 @@ auto UiTask::Main() -> void {
   }
 }
 
-auto UiTask::input(std::shared_ptr<EncoderInput> input) -> void {
+auto UiTask::input(std::shared_ptr<input::LvglInputDriver> input) -> void {
   assert(current_screen_);
   input_ = input;
-  lv_indev_set_group(input_->registration(), current_screen_->group());
 }
 
 auto UiTask::Start() -> UiTask* {
@@ -98,11 +94,4 @@ auto UiTask::Start() -> UiTask* {
   return ret;
 }
 
-static auto group_focus_cb(lv_group_t *group) -> void {
-  // TODO(robin): we probably want to vary this, configure this, etc
-  events::System().Dispatch(system_fsm::HapticTrigger{
-    .effect = drivers::Haptics::Effect::kMediumClick1_100Pct,
-  });
-}
-
 }  // namespace ui
diff --git a/src/ui/ui_fsm.cpp b/src/ui/ui_fsm.cpp
index 739c4598..1c296ac7 100644
--- a/src/ui/ui_fsm.cpp
+++ b/src/ui/ui_fsm.cpp
@@ -12,9 +12,14 @@
 
 #include "bluetooth_types.hpp"
 #include "db_events.hpp"
+#include "device_factory.hpp"
 #include "display_init.hpp"
+#include "feedback_haptics.hpp"
 #include "freertos/portmacro.h"
 #include "freertos/projdefs.h"
+#include "input_device.hpp"
+#include "input_touch_wheel.hpp"
+#include "input_volume_buttons.hpp"
 #include "lua.h"
 #include "lua.hpp"
 
@@ -30,19 +35,18 @@
 #include "lauxlib.h"
 #include "lua_thread.hpp"
 #include "luavgl.h"
+#include "lvgl_input_driver.hpp"
 #include "memory_resource.hpp"
 #include "misc/lv_gc.h"
 
 #include "audio_events.hpp"
 #include "display.hpp"
-#include "encoder_input.hpp"
 #include "event_queue.hpp"
 #include "gpios.hpp"
 #include "lua_registry.hpp"
 #include "lvgl_task.hpp"
 #include "nvs.hpp"
 #include "property.hpp"
-#include "relative_wheel.hpp"
 #include "samd.hpp"
 #include "screen.hpp"
 #include "screen_lua.hpp"
@@ -63,7 +67,9 @@ namespace ui {
 std::unique_ptr<UiTask> UiState::sTask;
 std::shared_ptr<system_fsm::ServiceLocator> UiState::sServices;
 std::unique_ptr<drivers::Display> UiState::sDisplay;
-std::shared_ptr<EncoderInput> UiState::sInput;
+
+std::shared_ptr<input::LvglInputDriver> UiState::sInput;
+std::unique_ptr<input::DeviceFactory> UiState::sDeviceFactory;
 
 std::stack<std::shared_ptr<Screen>> UiState::sScreens;
 std::shared_ptr<Screen> UiState::sCurrentScreen;
@@ -234,52 +240,6 @@ lua::Property UiState::sDisplayBrightness{
       return true;
     }};
 
-lua::Property UiState::sControlsScheme{
-    0, [](const lua::LuaValue& val) {
-      if (!std::holds_alternative<int>(val)) {
-        return false;
-      }
-      drivers::NvsStorage::InputModes mode;
-      switch (std::get<int>(val)) {
-        case 0:
-          mode = drivers::NvsStorage::InputModes::kButtonsOnly;
-          break;
-        case 1:
-          mode = drivers::NvsStorage::InputModes::kButtonsWithWheel;
-          break;
-        case 2:
-          mode = drivers::NvsStorage::InputModes::kDirectionalWheel;
-          break;
-        case 3:
-          mode = drivers::NvsStorage::InputModes::kRotatingWheel;
-          break;
-        default:
-          return false;
-      }
-      sServices->nvs().PrimaryInput(mode);
-      sInput->mode(mode);
-      return true;
-    }};
-
-lua::Property UiState::sScrollSensitivity{
-    0, [](const lua::LuaValue& val) {
-      std::optional<int> sensitivity = 0;
-      std::visit(
-          [&](auto&& v) {
-            using T = std::decay_t<decltype(v)>;
-            if constexpr (std::is_same_v<T, int>) {
-              sensitivity = v;
-            }
-          },
-          val);
-      if (!sensitivity) {
-        return false;
-      }
-      sInput->scroll_sensitivity(*sensitivity);
-      sServices->nvs().ScrollSensitivity(*sensitivity);
-      return true;
-    }};
-
 lua::Property UiState::sLockSwitch{false};
 
 lua::Property UiState::sDatabaseUpdating{false};
@@ -368,13 +328,6 @@ void UiState::react(const system_fsm::SamdUsbStatusChanged& ev) {
                              drivers::Samd::UsbStatus::kAttachedBusy);
 }
 
-void UiState::react(const internal::ControlSchemeChanged&) {
-  if (!sInput) {
-    return;
-  }
-  sInput->mode(sServices->nvs().PrimaryInput());
-}
-
 void UiState::react(const database::event::UpdateStarted&) {
   sDatabaseUpdating.Update(true);
 }
@@ -478,22 +431,11 @@ void Splash::react(const system_fsm::BootComplete& ev) {
   sDisplayBrightness.Update(brightness);
   sDisplay->SetBrightness(brightness);
 
-  auto touchwheel = sServices->touchwheel();
-  if (touchwheel) {
-    sInput = std::make_shared<EncoderInput>(sServices->gpios(), **touchwheel);
+  sDeviceFactory = std::make_unique<input::DeviceFactory>(sServices);
+  sInput = std::make_shared<input::LvglInputDriver>(sServices->nvs(),
+                                                    *sDeviceFactory);
 
-    auto mode = sServices->nvs().PrimaryInput();
-    sInput->mode(mode);
-    sControlsScheme.Update(static_cast<int>(mode));
-
-    auto sensitivity = sServices->nvs().ScrollSensitivity();
-    sInput->scroll_sensitivity(sensitivity);
-    sScrollSensitivity.Update(static_cast<int>(sensitivity));
-
-    sTask->input(sInput);
-  } else {
-    ESP_LOGE(kTag, "no input devices initialised!");
-  }
+  sTask->input(sInput);
 }
 
 void Splash::react(const system_fsm::StorageMounted&) {
@@ -550,12 +492,16 @@ void Lua::entry() {
                                    {"brightness", &sDisplayBrightness},
                                });
 
-    registry.AddPropertyModule("controls",
-                               {
-                                   {"scheme", &sControlsScheme},
-                                   {"scroll_sensitivity", &sScrollSensitivity},
-                                   {"lock_switch", &sLockSwitch},
-                               });
+    registry.AddPropertyModule("controls", {
+                                               {"scheme", &sInput->mode()},
+                                               {"lock_switch", &sLockSwitch},
+                                           });
+
+    if (sDeviceFactory->touch_wheel()) {
+      registry.AddPropertyModule(
+          "controls", {{"scroll_sensitivity",
+                        &sDeviceFactory->touch_wheel()->sensitivity()}});
+    }
 
     registry.AddPropertyModule(
         "backstack",