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-rw-r--r--src/core/hle/service/hid/hid.cpp138
1 files changed, 138 insertions, 0 deletions
diff --git a/src/core/hle/service/hid/hid.cpp b/src/core/hle/service/hid/hid.cpp
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+++ b/src/core/hle/service/hid/hid.cpp
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+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/service/hid/hid.h"
+
+#include "core/arm/arm_interface.h"
+#include "core/hle/kernel/event.h"
+#include "core/hle/kernel/shared_memory.h"
+#include "core/hle/hle.h"
+
+namespace Service {
+namespace HID {
+
+Handle g_shared_mem = 0;
+
+Handle g_event_pad_or_touch_1 = 0;
+Handle g_event_pad_or_touch_2 = 0;
+Handle g_event_accelerometer = 0;
+Handle g_event_gyroscope = 0;
+Handle g_event_debug_pad = 0;
+
+// Next Pad state update information
+static PadState next_state = {{0}};
+static u32 next_index = 0;
+static s16 next_circle_x = 0;
+static s16 next_circle_y = 0;
+
+/**
+ * Gets a pointer to the PadData structure inside HID shared memory
+ */
+static inline PadData* GetPadData() {
+ return reinterpret_cast<PadData*>(Kernel::GetSharedMemoryPointer(g_shared_mem, 0).ValueOr(nullptr));
+}
+
+/**
+ * Circle Pad from keys.
+ *
+ * This is implemented as "pushed all the way to an edge (max) or centered (0)".
+ *
+ * Indicate the circle pad is pushed completely to the edge in 1 of 8 directions.
+ */
+static void UpdateNextCirclePadState() {
+ static const s16 max_value = 0x9C;
+ next_circle_x = next_state.circle_left ? -max_value : 0x0;
+ next_circle_x += next_state.circle_right ? max_value : 0x0;
+ next_circle_y = next_state.circle_down ? -max_value : 0x0;
+ next_circle_y += next_state.circle_up ? max_value : 0x0;
+}
+
+/**
+ * Sets a Pad state (button or button combo) as pressed
+ */
+void PadButtonPress(const PadState& pad_state) {
+ next_state.hex |= pad_state.hex;
+ UpdateNextCirclePadState();
+}
+
+/**
+ * Sets a Pad state (button or button combo) as released
+ */
+void PadButtonRelease(const PadState& pad_state) {
+ next_state.hex &= ~pad_state.hex;
+ UpdateNextCirclePadState();
+}
+
+/**
+ * Called after all Pad changes to be included in this update have been made,
+ * including both Pad key changes and analog circle Pad changes.
+ */
+void PadUpdateComplete() {
+ PadData* pad_data = GetPadData();
+
+ if (pad_data == nullptr) {
+ return;
+ }
+
+ // Update PadData struct
+ pad_data->current_state.hex = next_state.hex;
+ pad_data->index = next_index;
+ next_index = (next_index + 1) % pad_data->entries.size();
+
+ // Get the previous Pad state
+ u32 last_entry_index = (pad_data->index - 1) % pad_data->entries.size();
+ PadState old_state = pad_data->entries[last_entry_index].current_state;
+
+ // Compute bitmask with 1s for bits different from the old state
+ PadState changed;
+ changed.hex = (next_state.hex ^ old_state.hex);
+
+ // Compute what was added
+ PadState additions;
+ additions.hex = changed.hex & next_state.hex;
+
+ // Compute what was removed
+ PadState removals;
+ removals.hex = changed.hex & old_state.hex;
+
+ // Get the current Pad entry
+ PadDataEntry* current_pad_entry = &pad_data->entries[pad_data->index];
+
+ // Update entry properties
+ current_pad_entry->current_state.hex = next_state.hex;
+ current_pad_entry->delta_additions.hex = additions.hex;
+ current_pad_entry->delta_removals.hex = removals.hex;
+
+ // Set circle Pad
+ current_pad_entry->circle_pad_x = next_circle_x;
+ current_pad_entry->circle_pad_y = next_circle_y;
+
+ // If we just updated index 0, provide a new timestamp
+ if (pad_data->index == 0) {
+ pad_data->index_reset_ticks_previous = pad_data->index_reset_ticks;
+ pad_data->index_reset_ticks = (s64)Core::g_app_core->GetTicks();
+ }
+
+ // Signal both handles when there's an update to Pad or touch
+ Kernel::SignalEvent(g_event_pad_or_touch_1);
+ Kernel::SignalEvent(g_event_pad_or_touch_2);
+}
+
+void HIDInit() {
+ g_shared_mem = Kernel::CreateSharedMemory("HID:SharedMem"); // Create shared memory object
+
+ // Create event handles
+ g_event_pad_or_touch_1 = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID:EventPadOrTouch1");
+ g_event_pad_or_touch_2 = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID:EventPadOrTouch2");
+ g_event_accelerometer = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID:EventAccelerometer");
+ g_event_gyroscope = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID:EventGyroscope");
+ g_event_debug_pad = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID:EventDebugPad");
+}
+
+void HIDShutdown() {
+
+}
+
+}
+}