[cgutman] 54415: [I8042PRT] - Implement support for hot plugging PS/2 mice if one was present at boot (same requirement as Windows) - Fixes bug 1395

Author: cgutman
Date: Thu Nov 17 23:41:18 2011
New Revision: 54415

URL: http://svn.reactos.org/svn/reactos?rev=54415&view=rev
Log:
[I8042PRT]
- Implement support for hot plugging PS/2 mice if one was present at boot (same requirement as Windows)
- Fixes bug 1395

Modified:
    trunk/reactos/drivers/input/i8042prt/mouse.c

Modified: trunk/reactos/drivers/input/i8042prt/mouse.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/input/i8042prt/mous...
==============================================================================
--- trunk/reactos/drivers/input/i8042prt/mouse.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/input/i8042prt/mouse.c [iso-8859-1] Thu Nov 17 23:41:18 2011
@@ -361,12 +361,8 @@

Irql = KeAcquireInterruptSpinLock(PortDeviceExtension->HighestDIRQLInterrupt);

-	WARN_(I8042PRT, "Mouse initialization timeout! (substate %x). Disabling mouse.\n",
+	WARN_(I8042PRT, "Mouse initialization timeout! (substate %x)\n",
    	DeviceExtension->MouseResetState);
-
-	i8042Flush(PortDeviceExtension);
-	i8042ChangeMode(PortDeviceExtension, CCB_MOUSE_INT_ENAB, CCB_MOUSE_DISAB);
-	i8042Flush(PortDeviceExtension);

PortDeviceExtension->Flags &= ~MOUSE_PRESENT;

@@ -633,8 +629,21 @@
    if (i8042MouCallIsrHook(DeviceExtension, Status, Value, &ToReturn))
    	return ToReturn;

-	if (MouseResetting != DeviceExtension->MouseState)
+	if (MouseIdle == DeviceExtension->MouseState)
+	{
+		/* Magic packet value that indicates a reset */
+		if (0xAA == Value)
+		{
+			WARN_(I8042PRT, "Hot plugged mouse!\n");
+			DeviceExtension->MouseState = MouseResetting;
+			DeviceExtension->MouseResetState = ExpectingReset;
+		}
+		else
+			return FALSE;
+	}
+	else if (MouseResetting != DeviceExtension->MouseState)
    	return FALSE;
+
    DeviceExtension->MouseTimeoutState = TimeoutStart;
    PortDeviceExtension = DeviceExtension->Common.PortDeviceExtension;

@@ -870,6 +879,7 @@
    		DeviceExtension->MouseResetState = ExpectingEnableACK;
    		return TRUE;
    	case ExpectingEnableACK:
+			PortDeviceExtension->Flags |= MOUSE_PRESENT;
    		DeviceExtension->MouseState = MouseIdle;
    		DeviceExtension->MouseTimeoutState = TimeoutCancel;
    		INFO_(I8042PRT, "Mouse type = %u\n", DeviceExtension->MouseType);