Add a hard reset input sequence to recover from broken device states

- Unlock device
- Hold both volume buttons
- Lock device
- Unlock device

3 files changed, 86 insertions, 0 deletions

diff --git a/src/tangara/input/device_factory.cpp b/src/tangara/input/device_factory.cpp
index 09fd2fd2..22df4ebe 100644
--- a/src/tangara/input/device_factory.cpp
+++ b/src/tangara/input/device_factory.cpp
@@ -11,6 +11,7 @@
 #include "input/feedback_haptics.hpp"
 #include "input/feedback_tts.hpp"
 #include "input/input_device.hpp"
+#include "input/input_hard_reset.hpp"
 #include "input/input_nav_buttons.hpp"
 #include "input/input_touch_dpad.hpp"
 #include "input/input_touch_wheel.hpp"
@@ -48,6 +49,7 @@ auto DeviceFactory::createInputs(drivers::NvsStorage::InputModes mode)
       }
       break;
   }
+  ret.push_back(std::make_shared<HardReset>(services_->gpios()));
   return ret;
 }
 
diff --git a/src/tangara/input/input_hard_reset.cpp b/src/tangara/input/input_hard_reset.cpp
new file mode 100644
index 00000000..7fcca3eb
--- /dev/null
+++ b/src/tangara/input/input_hard_reset.cpp
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2025 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "input/input_hard_reset.hpp"
+
+#include "drivers/gpios.hpp"
+#include "esp_system.h"
+#include "input/input_hook_actions.hpp"
+
+namespace input {
+
+HardReset::HardReset(drivers::IGpios& gpios) : gpios_(gpios) {}
+
+auto HardReset::read(lv_indev_data_t* data) -> void {
+  bool buttons_pressed = !gpios_.Get(drivers::IGpios::Pin::kKeyUp) &&
+                         !gpios_.Get(drivers::IGpios::Pin::kKeyDown);
+  if (!buttons_pressed) {
+    stage_ = 0;
+    return;
+  }
+
+  bool locked = gpios_.IsLocked();
+
+  if (stage_ == 0 && !locked) {
+    stage_++;
+    return;
+  }
+  if (stage_ == 1 && locked) {
+    stage_++;
+    return;
+  }
+  if (stage_ == 2 && !locked) {
+    // Bye!
+    esp_restart();
+  }
+}
+
+auto HardReset::name() -> std::string {
+  return "hard_reset";
+}
+
+auto HardReset::triggers()
+    -> std::vector<std::reference_wrapper<TriggerHooks>> {
+  return {};
+}
+
+}  // namespace input
diff --git a/src/tangara/input/input_hard_reset.hpp b/src/tangara/input/input_hard_reset.hpp
new file mode 100644
index 00000000..00f218bf
--- /dev/null
+++ b/src/tangara/input/input_hard_reset.hpp
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2025 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <cstdint>
+
+#include "indev/lv_indev.h"
+
+#include "drivers/gpios.hpp"
+#include "input/input_device.hpp"
+#include "input/input_hook.hpp"
+
+namespace input {
+
+class HardReset : public IInputDevice {
+ public:
+  HardReset(drivers::IGpios&);
+
+  auto read(lv_indev_data_t* data) -> void override;
+
+  auto name() -> std::string override;
+  auto triggers() -> std::vector<std::reference_wrapper<TriggerHooks>> override;
+
+ private:
+  drivers::IGpios& gpios_;
+
+  int stage_;
+};
+
+}  // namespace input