Duckstation/src/core/analog_controller.cpp

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#include "analog_controller.h"
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#include "common/log.h"
#include "common/state_wrapper.h"
Log_SetChannel(AnalogController);
AnalogController::AnalogController()
{
m_axis_state.fill(0x80);
}
AnalogController::~AnalogController() = default;
ControllerType AnalogController::GetType() const
{
return ControllerType::AnalogController;
}
void AnalogController::Reset()
{
m_analog_mode = false;
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m_rumble_unlocked = false;
m_configuration_mode = false;
m_command_param = 0;
}
bool AnalogController::DoState(StateWrapper& sw)
{
if (!Controller::DoState(sw))
return false;
sw.Do(&m_analog_mode);
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sw.Do(&m_rumble_unlocked);
sw.Do(&m_configuration_mode);
sw.Do(&m_command_param);
sw.Do(&m_state);
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MotorState motor_state = m_motor_state;
sw.Do(&motor_state);
if (sw.IsReading())
{
for (u8 i = 0; i < NUM_MOTORS; i++)
SetMotorState(i, motor_state[i]);
}
return true;
}
std::optional<s32> AnalogController::GetAxisCodeByName(std::string_view axis_name) const
{
return StaticGetAxisCodeByName(axis_name);
}
std::optional<s32> AnalogController::GetButtonCodeByName(std::string_view button_name) const
{
return StaticGetButtonCodeByName(button_name);
}
void AnalogController::SetAxisState(s32 axis_code, float value)
{
if (axis_code < 0 || axis_code >= static_cast<s32>(Button::Count))
return;
// -1..1 -> 0..255
const u8 u8_value = static_cast<u8>(std::clamp(((value + 1.0f) / 2.0f) * 255.0f, 0.0f, 255.0f));
SetAxisState(static_cast<Axis>(axis_code), u8_value);
}
void AnalogController::SetAxisState(Axis axis, u8 value)
{
m_axis_state[static_cast<u8>(axis)] = value;
}
void AnalogController::SetButtonState(Button button, bool pressed)
{
if (pressed)
m_button_state &= ~(u16(1) << static_cast<u8>(button));
else
m_button_state |= u16(1) << static_cast<u8>(button);
}
void AnalogController::SetButtonState(s32 button_code, bool pressed)
{
if (button_code < 0 || button_code >= static_cast<s32>(Button::Count))
return;
SetButtonState(static_cast<Button>(button_code), pressed);
}
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u32 AnalogController::GetVibrationMotorCount() const
{
return NUM_MOTORS;
}
float AnalogController::GetVibrationMotorStrength(u32 motor)
{
DebugAssert(motor < NUM_MOTORS);
return static_cast<float>(m_motor_state[motor]) * (1.0f / 255.0f);
}
void AnalogController::ResetTransferState()
{
m_state = State::Idle;
}
u16 AnalogController::GetID() const
{
static constexpr u16 DIGITAL_MODE_ID = 0x5A41;
static constexpr u16 ANALOG_MODE_ID = 0x5A73;
static constexpr u16 CONFIG_MODE_ID = 0x5AF3;
if (m_configuration_mode)
return CONFIG_MODE_ID;
return m_analog_mode ? ANALOG_MODE_ID : DIGITAL_MODE_ID;
}
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void AnalogController::SetAnalogMode(bool enabled)
{
if (m_analog_mode == enabled)
return;
Log_InfoPrintf("Controller switched to %s mode", enabled ? "analog" : "digital");
m_analog_mode = enabled;
}
void AnalogController::SetMotorState(u8 motor, u8 value)
{
DebugAssert(motor < NUM_MOTORS);
m_motor_state[motor] = value;
}
bool AnalogController::Transfer(const u8 data_in, u8* data_out)
{
bool ack;
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#ifdef _DEBUG
u8 old_state = static_cast<u8>(m_state);
#endif
switch (m_state)
{
#define FIXED_REPLY_STATE(state, reply, ack_value, next_state) \
case state: \
{ \
*data_out = reply; \
m_state = next_state; \
ack = ack_value; \
} \
break;
#define ID_STATE_MSB(state, next_state) \
case state: \
{ \
*data_out = Truncate8(GetID() >> 8); \
m_state = next_state; \
ack = true; \
} \
break;
case State::Idle:
{
// ack when sent 0x01, send ID for 0x42
if (data_in == 0x42)
{
*data_out = Truncate8(GetID());
m_state = State::GetStateIDMSB;
ack = true;
}
else if (data_in == 0x43)
{
*data_out = Truncate8(GetID());
m_state = State::ConfigModeIDMSB;
ack = true;
}
else if (m_configuration_mode && data_in == 0x44)
{
*data_out = Truncate8(GetID());
m_state = State::SetAnalogModeIDMSB;
ack = true;
}
else if (m_configuration_mode && data_in == 0x45)
{
*data_out = Truncate8(GetID());
m_state = State::GetAnalogModeIDMSB;
ack = true;
}
else if (m_configuration_mode && data_in == 0x46)
{
*data_out = Truncate8(GetID());
m_state = State::Command46IDMSB;
ack = true;
}
else if (m_configuration_mode && data_in == 0x47)
{
*data_out = Truncate8(GetID());
m_state = State::Command47IDMSB;
ack = true;
}
else if (m_configuration_mode && data_in == 0x4C)
{
*data_out = Truncate8(GetID());
m_state = State::Command4CIDMSB;
ack = true;
}
else if (m_configuration_mode && data_in == 0x4D)
{
m_analog_mode = true;
m_rumble_unlocked = true;
*data_out = Truncate8(GetID());
m_state = State::UnlockRumbleIDMSB;
ack = true;
}
else
{
Log_DebugPrintf("data_in = 0x%02X", data_in);
*data_out = 0xFF;
ack = (data_in == 0x01);
}
}
break;
ID_STATE_MSB(State::GetStateIDMSB, State::GetStateButtonsLSB);
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case State::GetStateButtonsLSB:
{
if (m_rumble_unlocked)
SetMotorState(0, data_in);
*data_out = Truncate8(m_button_state);
m_state = State::GetStateButtonsMSB;
ack = true;
}
break;
case State::GetStateButtonsMSB:
{
if (m_rumble_unlocked)
SetMotorState(1, data_in);
*data_out = Truncate8(m_button_state >> 8);
m_state = m_analog_mode ? State::GetStateRightAxisX : State::Idle;
ack = m_analog_mode;
}
break;
FIXED_REPLY_STATE(State::GetStateRightAxisX, Truncate8(m_axis_state[static_cast<u8>(Axis::RightX)]), true,
State::GetStateRightAxisY);
FIXED_REPLY_STATE(State::GetStateRightAxisY, Truncate8(m_axis_state[static_cast<u8>(Axis::RightY)]), true,
State::GetStateLeftAxisX);
FIXED_REPLY_STATE(State::GetStateLeftAxisX, Truncate8(m_axis_state[static_cast<u8>(Axis::LeftX)]), true,
State::GetStateLeftAxisY);
FIXED_REPLY_STATE(State::GetStateLeftAxisY, Truncate8(m_axis_state[static_cast<u8>(Axis::LeftY)]), false,
State::Idle);
ID_STATE_MSB(State::ConfigModeIDMSB, State::ConfigModeSetMode);
case State::ConfigModeSetMode:
{
Log_DebugPrintf("0x%02x(%s) config mode", data_in, data_in == 1 ? "enter" : "leave");
m_configuration_mode = (data_in == 1);
*data_out = Truncate8(m_button_state);
m_state = State::GetStateButtonsMSB;
ack = true;
}
break;
ID_STATE_MSB(State::SetAnalogModeIDMSB, State::SetAnalogModeVal);
case State::SetAnalogModeVal:
{
Log_DebugPrintf("analog mode val 0x%02x", data_in);
m_command_param = data_in;
*data_out = 0x00;
m_state = State::SetAnalogModeSel;
ack = true;
}
break;
case State::SetAnalogModeSel:
{
Log_DebugPrintf("analog mode sel 0x%02x", data_in);
if (data_in != 0x00)
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SetAnalogMode(m_command_param == 0x01);
*data_out = 0x00;
m_state = State::Pad4Bytes;
ack = true;
}
break;
ID_STATE_MSB(State::GetAnalogModeIDMSB, State::GetAnalogMode1);
FIXED_REPLY_STATE(State::GetAnalogMode1, 0x01, true, State::GetAnalogMode2);
FIXED_REPLY_STATE(State::GetAnalogMode2, 0x02, true, State::GetAnalogMode3);
FIXED_REPLY_STATE(State::GetAnalogMode3, BoolToUInt8(m_analog_mode), true, State::GetAnalogMode4);
FIXED_REPLY_STATE(State::GetAnalogMode4, 0x02, true, State::GetAnalogMode5);
FIXED_REPLY_STATE(State::GetAnalogMode5, 0x01, true, State::GetAnalogMode6);
FIXED_REPLY_STATE(State::GetAnalogMode6, 0x00, false, State::Idle);
ID_STATE_MSB(State::Command46IDMSB, State::Command461);
case State::Command461:
{
Log_DebugPrintf("command 46 param 0x%02X", data_in);
m_command_param = data_in;
*data_out = 0x00;
m_state = State::Command462;
ack = true;
}
break;
FIXED_REPLY_STATE(State::Command462, 0x00, true, State::Command463);
FIXED_REPLY_STATE(State::Command463, 0x01, true, State::Command464);
FIXED_REPLY_STATE(State::Command464, ((m_command_param == 1) ? 1 : 2), true, State::Command465);
FIXED_REPLY_STATE(State::Command465, ((m_command_param == 1) ? 1 : 0), true, State::Command466);
FIXED_REPLY_STATE(State::Command466, ((m_command_param == 1) ? 0x14 : 0x0A), false, State::Idle);
ID_STATE_MSB(State::Command47IDMSB, State::Command471);
FIXED_REPLY_STATE(State::Command471, 0x00, true, State::Command472);
FIXED_REPLY_STATE(State::Command472, 0x00, true, State::Command473);
FIXED_REPLY_STATE(State::Command473, 0x02, true, State::Command474);
FIXED_REPLY_STATE(State::Command474, 0x00, true, State::Command475);
FIXED_REPLY_STATE(State::Command475, 0x01, true, State::Command476);
FIXED_REPLY_STATE(State::Command476, 0x00, false, State::Idle);
ID_STATE_MSB(State::Command4CIDMSB, State::Command4CMode);
case State::Command4CMode:
{
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SetAnalogMode(data_in != 0x00);
Log_DebugPrintf("analog mode %s by 0x4c", m_analog_mode ? "enabled" : "disabled");
*data_out = 0x00;
m_state = State::Command4C1;
ack = true;
}
break;
FIXED_REPLY_STATE(State::Command4C1, 0x00, true, State::Command4C2);
FIXED_REPLY_STATE(State::Command4C2, 0x00, true, State::Command4C3);
FIXED_REPLY_STATE(State::Command4C3, m_analog_mode ? 0x07 : 0x04, true, State::Command4C4);
FIXED_REPLY_STATE(State::Command4C4, 0x00, true, State::Command4C5);
FIXED_REPLY_STATE(State::Command4C5, 0x00, false, State::Idle);
ID_STATE_MSB(State::UnlockRumbleIDMSB, State::Pad6Bytes);
FIXED_REPLY_STATE(State::Pad6Bytes, 0x00, true, State::Pad5Bytes);
FIXED_REPLY_STATE(State::Pad5Bytes, 0x00, true, State::Pad4Bytes);
FIXED_REPLY_STATE(State::Pad4Bytes, 0x00, true, State::Pad3Bytes);
FIXED_REPLY_STATE(State::Pad3Bytes, 0x00, true, State::Pad2Bytes);
FIXED_REPLY_STATE(State::Pad2Bytes, 0x00, true, State::Pad1Byte);
FIXED_REPLY_STATE(State::Pad1Byte, 0x00, false, State::Idle);
default:
{
UnreachableCode();
return false;
}
}
Log_DebugPrintf("Transfer, old_state=%u, new_state=%u, data_in=0x%02X, data_out=0x%02X, ack=%s",
static_cast<u32>(old_state), static_cast<u32>(m_state), data_in, *data_out, ack ? "true" : "false");
return ack;
}
std::unique_ptr<AnalogController> AnalogController::Create()
{
return std::make_unique<AnalogController>();
}
std::optional<s32> AnalogController::StaticGetAxisCodeByName(std::string_view axis_name)
{
#define AXIS(name) \
if (axis_name == #name) \
{ \
return static_cast<s32>(ZeroExtend32(static_cast<u8>(Axis::name))); \
}
AXIS(LeftX);
AXIS(LeftY);
AXIS(RightX);
AXIS(RightY);
return std::nullopt;
#undef AXIS
}
std::optional<s32> AnalogController::StaticGetButtonCodeByName(std::string_view button_name)
{
#define BUTTON(name) \
if (button_name == #name) \
{ \
return static_cast<s32>(ZeroExtend32(static_cast<u8>(Button::name))); \
}
BUTTON(Select);
BUTTON(L3);
BUTTON(R3);
BUTTON(Start);
BUTTON(Up);
BUTTON(Right);
BUTTON(Down);
BUTTON(Left);
BUTTON(L2);
BUTTON(R2);
BUTTON(L1);
BUTTON(R1);
BUTTON(Triangle);
BUTTON(Circle);
BUTTON(Cross);
BUTTON(Square);
return std::nullopt;
#undef BUTTON
}
Controller::AxisList AnalogController::StaticGetAxisNames()
{
#define A(n) \
{ \
#n, static_cast < s32>(Axis::n) \
}
return {A(LeftX), A(LeftY), A(RightX), A(RightY)};
#undef A
}
Controller::ButtonList AnalogController::StaticGetButtonNames()
{
#define B(n) \
{ \
#n, static_cast < s32>(Button::n) \
}
return {B(Up), B(Down), B(Left), B(Right), B(Select), B(Start), B(Triangle), B(Cross), B(Circle),
B(Square), B(L1), B(L2), B(R1), B(R2), B(L3), B(R3)};
#undef B
}
u32 AnalogController::StaticGetVibrationMotorCount()
{
return NUM_MOTORS;
}