yuzu/src/core/hle/service/hid.cpp

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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include "common/log.h"
#include "core/hle/hle.h"
#include "core/hle/kernel/event.h"
#include "core/hle/kernel/shared_memory.h"
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#include "core/hle/service/hid.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
// Namespace HID_User
namespace HID_User {
Handle g_shared_mem = 0; ///< Handle to shared memory region designated to HID_User service
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// Event handles
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
PADState g_next_state = {{0}};
u32 g_next_index = 0;
s16 g_next_circle_x = 0;
s16 g_next_circle_y = 0;
/** Gets a pointer to the PADData structure inside HID shared memory
*/
static inline PADData* GetPADData() {
if (0 == g_shared_mem)
return nullptr;
return reinterpret_cast<PADData*>(Kernel::GetSharedMemoryPointer(g_shared_mem, 0));
}
/** 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.
*/
void UpdateNextCirclePADState() {
static const s16 max_value = 0x9C;
g_next_circle_x = g_next_state.circle_left ? -max_value : 0x0;
g_next_circle_x += g_next_state.circle_right ? max_value : 0x0;
g_next_circle_y = g_next_state.circle_down ? -max_value : 0x0;
g_next_circle_y += g_next_state.circle_up ? max_value : 0x0;
}
/** Sets a PAD state (button or button combo) as pressed
*/
void PADButtonPress(PADState pad_state) {
g_next_state.hex |= pad_state.hex;
UpdateNextCirclePADState();
}
/** Sets a PAD state (button or button combo) as released
*/
void PADButtonRelease(PADState pad_state) {
g_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();
// Update PADData struct
pad_data->current_state.hex = g_next_state.hex;
pad_data->index = g_next_index;
g_next_index = (g_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 = (g_next_state.hex ^ old_state.hex);
// Compute what was added
PADState additions;
additions.hex = changed.hex & g_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 = g_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 = g_next_circle_x;
current_pad_entry->circle_pad_y = g_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);
}
// TODO(peachum):
// Add a method for setting analog input from joystick device for the circle PAD.
//
// This method should:
// * Be called after both PADButton<Press, Release>().
// * Be called before PADUpdateComplete()
// * Set current PADEntry.circle_pad_<axis> using analog data
// * Set PadData.raw_circle_pad_data
// * Set PadData.current_state.circle_right = 1 if current PADEntry.circle_pad_x >= 41
// * Set PadData.current_state.circle_up = 1 if current PADEntry.circle_pad_y >= 41
// * Set PadData.current_state.circle_left = 1 if current PADEntry.circle_pad_x <= -41
// * Set PadData.current_state.circle_right = 1 if current PADEntry.circle_pad_y <= -41
/**
* HID_User::GetIPCHandles service function
* Inputs:
* None
* Outputs:
* 1 : Result of function, 0 on success, otherwise error code
* 2 : Unused
* 3 : Handle to HID_User shared memory
* 4 : Event signaled by HID_User
* 5 : Event signaled by HID_User
* 6 : Event signaled by HID_User
* 7 : Gyroscope event
* 8 : Event signaled by HID_User
*/
void GetIPCHandles(Service::Interface* self) {
u32* cmd_buff = Service::GetCommandBuffer();
cmd_buff[1] = 0; // No error
cmd_buff[3] = g_shared_mem;
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cmd_buff[4] = g_event_pad_or_touch_1;
cmd_buff[5] = g_event_pad_or_touch_2;
cmd_buff[6] = g_event_accelerometer;
cmd_buff[7] = g_event_gyroscope;
cmd_buff[8] = g_event_debug_pad;
DEBUG_LOG(KERNEL, "called");
}
const Interface::FunctionInfo FunctionTable[] = {
{0x000A0000, GetIPCHandles, "GetIPCHandles"},
{0x000B0000, nullptr, "StartAnalogStickCalibration"},
{0x000E0000, nullptr, "GetAnalogStickCalibrateParam"},
{0x00110000, nullptr, "EnableAccelerometer"},
{0x00120000, nullptr, "DisableAccelerometer"},
{0x00130000, nullptr, "EnableGyroscopeLow"},
{0x00140000, nullptr, "DisableGyroscopeLow"},
{0x00150000, nullptr, "GetGyroscopeLowRawToDpsCoefficient"},
{0x00160000, nullptr, "GetGyroscopeLowCalibrateParam"},
{0x00170000, nullptr, "GetSoundVolume"},
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
// Interface class
Interface::Interface() {
g_shared_mem = Kernel::CreateSharedMemory("HID_User:SharedMem"); // Create shared memory object
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// Create event handles
g_event_pad_or_touch_1 = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventPADOrTouch1");
g_event_pad_or_touch_2 = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventPADOrTouch2");
g_event_accelerometer = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventAccelerometer");
g_event_gyroscope = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventGyroscope");
g_event_debug_pad = Kernel::CreateEvent(RESETTYPE_ONESHOT, "HID_User:EventDebugPAD");
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Register(FunctionTable, ARRAY_SIZE(FunctionTable));
}
Interface::~Interface() {
}
} // namespace