bool Ps2Input::pollEvent(Common::Event *event) {
bool checkPadMouse, checkPadKbd;
checkPadMouse = checkPadKbd = _pad->padAlive();
if (_mouseLoaded && (PS2MouseEnum() > 0)) { // usb mouse connected
mouse_data mData;
PS2MouseRead(&mData);
if ((_posX != mData.x) || (_posY != mData.y)) {
event->mouse.x = _posX = mData.x;
event->mouse.y = _posY = mData.y;
event->type = Common::EVENT_MOUSEMOVE;
return true;
}
if (mData.buttons != _mButtons) {
uint16 change = _mButtons ^ mData.buttons;
_mButtons = mData.buttons;
if (change & (PS2MOUSE_BTN1 | PS2MOUSE_BTN2)) {
if (change & PS2MOUSE_BTN1)
event->type = (_mButtons & PS2MOUSE_BTN1) ? Common::EVENT_LBUTTONDOWN : Common::EVENT_LBUTTONUP;
else
event->type = (_mButtons & PS2MOUSE_BTN2) ? Common::EVENT_RBUTTONDOWN : Common::EVENT_RBUTTONUP;
event->mouse.x = _posX;
event->mouse.y = _posY;
return true;
}
}
checkPadMouse = false;
}
if (_kbdLoaded) { // there's no way to tell if there's actually a keyboard connected
PS2KbdRawKey key;
if (PS2KbdReadRaw(&key) == 1) {
if (_usbToSdlk[key.key]) {
if ((_usbToSdlk[key.key] == Common::KEYCODE_LSHIFT) || (_usbToSdlk[key.key] == Common::KEYCODE_RSHIFT)) {
if (key.state & 1)
_keyFlags |= Common::KBD_SHIFT;
else
_keyFlags &= ~Common::KBD_SHIFT;
} else if ((_usbToSdlk[key.key] == Common::KEYCODE_LCTRL) || (_usbToSdlk[key.key] == Common::KEYCODE_RCTRL)) {
if (key.state & 1)
_keyFlags |= Common::KBD_CTRL;
else
_keyFlags &= ~Common::KBD_CTRL;
} else if ((_usbToSdlk[key.key] == Common::KEYCODE_LALT) || (_usbToSdlk[key.key] == Common::KEYCODE_RALT)) {
if (key.state & 1)
_keyFlags |= Common::KBD_ALT;
else
_keyFlags &= ~Common::KBD_ALT;
}
if (key.state & 1) // down
event->type = Common::EVENT_KEYDOWN;
else
event->type = Common::EVENT_KEYUP;
event->kbd.flags = 0;
event->kbd.keycode = _usbToSdlk[key.key];
event->kbd.ascii = mapKey(_usbToSdlk[key.key], _keyFlags);
return true;
} else
printf("unknown keycode %02X - %02X\n", key.state, key.key);
}
}
if (checkPadMouse || checkPadKbd) {
// no usb mouse, simulate it using the pad
uint16 buttons;
int16 joyh, joyv;
_pad->readPad(&buttons, &joyh, &joyv);
uint16 btnChange = buttons ^ _padLastButtons;
if (checkPadMouse) {
if (btnChange & (PAD_CROSS | PAD_CIRCLE)) {
if (btnChange & PAD_CROSS)
event->type = (buttons & PAD_CROSS) ? Common::EVENT_LBUTTONDOWN : Common::EVENT_LBUTTONUP;
else
event->type = (buttons & PAD_CIRCLE) ? Common::EVENT_RBUTTONDOWN : Common::EVENT_RBUTTONUP;
event->mouse.x = _posX;
event->mouse.y = _posY;
_padLastButtons = buttons;
return true;
}
uint32 time = _system->getMillis();
if (time - _lastPadCheck > PAD_CHECK_TIME) {
_lastPadCheck = time;
int16 newX = _posX;
int16 newY = _posY;
if ((ABS(joyh) > JOY_THRESHOLD) || (ABS(joyv) > JOY_THRESHOLD)) {
newX += joyh / 20;
newY += joyv / 20;
} else if (buttons & PAD_DIR_MASK) {
if (_padLastButtons & PAD_DIR_MASK) {
if (_padAccel < 16)
_padAccel++;
} else
_padAccel = 0;
_padLastButtons = buttons;
if (buttons & PAD_LEFT)
newX -= _padAccel >> 2;
if (buttons & PAD_RIGHT)
newX += _padAccel >> 2;
if (buttons & PAD_UP)
newY -= _padAccel >> 2;
if (buttons & PAD_DOWN)
newY += _padAccel >> 2;
}
newX = ((newX < (int16)_minx) ? (_minx) : ((newX > (int16)_maxx) ? (_maxx) : ((int16)newX)));
newY = ((newY < (int16)_miny) ? (_miny) : ((newY > (int16)_maxy) ? (_maxy) : ((int16)newY)));
if ((_posX != newX) || (_posY != newY)) {
event->type = Common::EVENT_MOUSEMOVE;
event->mouse.x = _posX = newX;
event->mouse.y = _posY = newY;
return true;
}
}
}
/**
Get mouse packet . Only care first 3 bytes
@param MouseDev Pointer of PS2 Mouse Private Data Structure
@retval EFI_NOT_READY Mouse Device not ready to input data packet, or some error happened during getting the packet
@retval EFI_SUCCESS The data packet is gotten successfully.
**/
EFI_STATUS
PS2MouseGetPacket (
PS2_MOUSE_DEV *MouseDev
)
{
EFI_STATUS Status;
BOOLEAN KeyboardEnable;
UINT8 Packet[PS2_PACKET_LENGTH];
UINT8 Data;
UINTN Count;
UINTN State;
INT16 RelativeMovementX;
INT16 RelativeMovementY;
BOOLEAN LButton;
BOOLEAN RButton;
KeyboardEnable = FALSE;
Count = 1;
State = PS2_READ_BYTE_ONE;
//
// State machine to get mouse packet
//
while (1) {
switch (State) {
case PS2_READ_BYTE_ONE:
//
// Read mouse first byte data, if failed, immediately return
//
KbcDisableAux ();
Status = PS2MouseRead (&Data, &Count, State);
if (EFI_ERROR (Status)) {
KbcEnableAux ();
return EFI_NOT_READY;
}
if (Count != 1) {
KbcEnableAux ();
return EFI_NOT_READY;
}
if (IS_PS2_SYNC_BYTE (Data)) {
Packet[0] = Data;
State = PS2_READ_DATA_BYTE;
CheckKbStatus (&KeyboardEnable);
KbcDisableKb ();
KbcEnableAux ();
}
break;
case PS2_READ_DATA_BYTE:
Count = 2;
Status = PS2MouseRead ((Packet + 1), &Count, State);
if (EFI_ERROR (Status)) {
if (KeyboardEnable) {
KbcEnableKb ();
}
return EFI_NOT_READY;
}
if (Count != 2) {
if (KeyboardEnable) {
KbcEnableKb ();
}
return EFI_NOT_READY;
}
State = PS2_PROCESS_PACKET;
break;
case PS2_PROCESS_PACKET:
if (KeyboardEnable) {
KbcEnableKb ();
}
//
// Decode the packet
//
RelativeMovementX = Packet[1];
RelativeMovementY = Packet[2];
//
// Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0
// Byte 0 | Y overflow | X overflow | Y sign bit | X sign bit | Always 1 | Middle Btn | Right Btn | Left Btn
// Byte 1 | 8 bit X Movement
// Byte 2 | 8 bit Y Movement
//
// X sign bit + 8 bit X Movement : 9-bit signed twos complement integer that presents the relative displacement of the device in the X direction since the last data transmission.
// Y sign bit + 8 bit Y Movement : Same as X sign bit + 8 bit X Movement.
//
//
// First, Clear X and Y high 8 bits
//
RelativeMovementX = (INT16) (RelativeMovementX & 0xFF);
RelativeMovementY = (INT16) (RelativeMovementY & 0xFF);
//
// Second, if the 9-bit signed twos complement integer is negative, set the high 8 bit 0xff
//
if ((Packet[0] & 0x10) != 0) {
RelativeMovementX = (INT16) (RelativeMovementX | 0xFF00);
}
if ((Packet[0] & 0x20) != 0) {
RelativeMovementY = (INT16) (RelativeMovementY | 0xFF00);
}
RButton = (UINT8) (Packet[0] & 0x2);
LButton = (UINT8) (Packet[0] & 0x1);
//
// Update mouse state
//
MouseDev->State.RelativeMovementX += RelativeMovementX;
MouseDev->State.RelativeMovementY -= RelativeMovementY;
MouseDev->State.RightButton = (UINT8) (RButton ? TRUE : FALSE);
MouseDev->State.LeftButton = (UINT8) (LButton ? TRUE : FALSE);
MouseDev->StateChanged = TRUE;
return EFI_SUCCESS;
}
}
}
