void ApplePS2SynapticsTouchPad::interruptOccurred( UInt8 data )
{
//
// This will be invoked automatically from our device when asynchronous
// events need to be delivered. Process the trackpad data. Do NOT issue
// any BLOCKING commands to our device in this context.
//
// Ignore all bytes until we see the start of a packet, otherwise the
// packets may get out of sequence and things will get very confusing.
//
if (_packetByteCount == 0 && ((data == kSC_Acknowledge) || !(data & 0x08)))
{
return;
}
//
// Add this byte to the packet buffer. If the packet is complete, that is,
// we have the three bytes, dispatch this packet for processing.
//
_packetBuffer[_packetByteCount++] = data;
if (_packetByteCount == 3)
{
dispatchRelativePointerEventWithPacket(_packetBuffer, 3);
_packetByteCount = 0;
}
}
void ApplePS2Mouse::interruptOccurred(UInt8 data) // PS2InterruptAction
{
//
// This will be invoked automatically from our device when asynchronous mouse
// needs to be delivered. Process the mouse data.
//
// We ignore all bytes until we see the start of a packet, otherwise the mouse
// packets may get out of sequence and things will get very confusing.
//
if (_packetByteCount == 0 && ((data == kSC_Acknowledge) || !(data & 0x08)))
{
IOLog("%s: Unexpected data from PS/2 controller.\n", getName());
//
// Reset the mouse when packet synchronization is lost. Limit the number
// of consecutive resets to guard against flaky hardware.
//
if (_mouseResetCount < 5)
{
_mouseResetCount++;
scheduleMouseReset();
}
return;
}
//
// Add this byte to the packet buffer. If the packet is complete, that is,
// we have the three (or four) bytes, dispatch this packet for processing.
//
_packetBuffer[_packetByteCount++] = data;
if (_packetByteCount == _packetLength)
{
dispatchRelativePointerEventWithPacket(_packetBuffer, _packetLength);
_packetByteCount = 0;
_mouseResetCount = 0;
}
else if (_packetByteCount == 2 && _packetBuffer[0] == 0xAA)
{
//
// "0xAA 0x00" 2-byte packet is sent following a mouse hardware reset.
// This can happen if the user removed and then inserted the same or a
// different mouse to the mouse port. Reset the mouse and hope for the
// best. KVM switches should not trigger this when switching stations.
//
scheduleMouseReset();
}
}
