Input: aiptek - rework the function key code

Function keys (also called macro keys) code corrected. Using a
lastMacro variable to keep track of key currently pressed. This
ensures proper resetting when dragging the pen in the drawing
area or to another key. Also suppress sending pressure reports
when over the macro key area.

Signed-off-by: Rene van Paassen <rene.vanpaassen@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/tablet/aiptek.c

@@ -509,6 +509,11 @@ static void aiptek_irq(struct urb *urb)
 						 aiptek->curSetting.wheel);
 				aiptek->curSetting.wheel = AIPTEK_WHEEL_DISABLE;
 			}
+			if (aiptek->lastMacro != -1) {
+			        input_report_key(inputdev,
+						 macroKeyEvents[aiptek->lastMacro], 0);
+				aiptek->lastMacro = -1;
+			}
 			input_sync(inputdev);
 		}
 	}
@@ -589,6 +594,11 @@ static void aiptek_irq(struct urb *urb)
 					}
 				}
 				input_report_abs(inputdev, ABS_MISC, p | AIPTEK_REPORT_TOOL_STYLUS);
+				if (aiptek->lastMacro != -1) {
+			                input_report_key(inputdev,
+							 macroKeyEvents[aiptek->lastMacro], 0);
+					aiptek->lastMacro = -1;
+				}
 				input_sync(inputdev);
 			}
 		}
@@ -647,6 +657,11 @@ static void aiptek_irq(struct urb *urb)
 					}
 				}
 				input_report_abs(inputdev, ABS_MISC, p | AIPTEK_REPORT_TOOL_MOUSE);
+				if (aiptek->lastMacro != -1) {
+			                input_report_key(inputdev,
+							 macroKeyEvents[aiptek->lastMacro], 0);
+				        aiptek->lastMacro = -1;
+				}
 				input_sync(inputdev);
 			}
 		}
@@ -662,10 +677,10 @@ static void aiptek_irq(struct urb *urb)
 		bs = (data[1] & aiptek->curSetting.stylusButtonLower) != 0 ? 1 : 0;
 		pck = (data[1] & aiptek->curSetting.stylusButtonUpper) != 0 ? 1 : 0;
 
-		macro = data[3];
+		macro = dv && p && tip && !(data[3] & 1) ? (data[3] >> 1) : -1;
 		z = le16_to_cpu(get_unaligned((__le16 *) (data + 4)));
 
-		if (dv != 0) {
+		if (dv) {
 		        /* If the selected tool changed, reset the old
 			 * tool key, and set the new one.
 			 */
@@ -679,30 +694,20 @@ static void aiptek_irq(struct urb *urb)
 				aiptek->previousToolMode =
 				        aiptek->curSetting.toolMode;
 			}
+		}
 
-			if (p != 0) {
-				input_report_key(inputdev, BTN_TOUCH, tip);
-				input_report_key(inputdev, BTN_STYLUS, bs);
-				input_report_key(inputdev, BTN_STYLUS2, pck);
-				input_report_abs(inputdev, ABS_PRESSURE, z);
-			}
+		if (aiptek->lastMacro != -1 && aiptek->lastMacro != macro) {
+		        input_report_key(inputdev, macroKeyEvents[aiptek->lastMacro], 0);
+			aiptek->lastMacro = -1;
+		}
 
-			/* For safety, we're sending key 'break' codes for the
-			 * neighboring macro keys.
-			 */
-			if (macro > 0) {
-				input_report_key(inputdev,
-						 macroKeyEvents[macro - 1], 0);
-			}
-			if (macro < 25) {
-				input_report_key(inputdev,
-						 macroKeyEvents[macro + 1], 0);
-			}
-			input_report_key(inputdev, macroKeyEvents[macro], p);
-			input_report_abs(inputdev, ABS_MISC,
-					 p | AIPTEK_REPORT_TOOL_STYLUS);
-			input_sync(inputdev);
+		if (macro != -1 && macro != aiptek->lastMacro) {
+			input_report_key(inputdev, macroKeyEvents[macro], 1);
+			aiptek->lastMacro = macro;
 		}
+		input_report_abs(inputdev, ABS_MISC,
+				 p | AIPTEK_REPORT_TOOL_STYLUS);
+		input_sync(inputdev);
 	}
 	/* Report 5s come from the macro keys when pressed by mouse
 	 */
@@ -714,46 +719,35 @@ static void aiptek_irq(struct urb *urb)
 		left = (data[1]& aiptek->curSetting.mouseButtonLeft) != 0 ? 1 : 0;
 		right = (data[1] & aiptek->curSetting.mouseButtonRight) != 0 ? 1 : 0;
 		middle = (data[1] & aiptek->curSetting.mouseButtonMiddle) != 0 ? 1 : 0;
-		macro = data[3];
+		macro = dv && p && left && !(data[3] & 1) ? (data[3] >> 1) : 0;
 
-		if (dv != 0) {
+		if (dv) {
 		        /* If the selected tool changed, reset the old
 			 * tool key, and set the new one.
 			 */
 		        if (aiptek->previousToolMode !=
 			    aiptek->curSetting.toolMode) {
-			        input_report_key(inputdev,
+		                input_report_key(inputdev,
 						 aiptek->previousToolMode, 0);
-				input_report_key(inputdev,
-						 aiptek->curSetting.toolMode,
-						 1);
-				aiptek->previousToolMode =
-				        aiptek->curSetting.toolMode;
-			}
-
-			if (p != 0) {
-				input_report_key(inputdev, BTN_LEFT, left);
-				input_report_key(inputdev, BTN_MIDDLE, middle);
-				input_report_key(inputdev, BTN_RIGHT, right);
+			        input_report_key(inputdev,
+						 aiptek->curSetting.toolMode, 1);
+			        aiptek->previousToolMode = aiptek->curSetting.toolMode;
 			}
+		}
 
-			/* For safety, we're sending key 'break' codes for the
-			 * neighboring macro keys.
-			 */
-			if (macro > 0) {
-				input_report_key(inputdev,
-						 macroKeyEvents[macro - 1], 0);
-			}
-			if (macro < 25) {
-				input_report_key(inputdev,
-						 macroKeyEvents[macro + 1], 0);
-			}
+		if (aiptek->lastMacro != -1 && aiptek->lastMacro != macro) {
+		        input_report_key(inputdev, macroKeyEvents[aiptek->lastMacro], 0);
+			aiptek->lastMacro = -1;
+		}
 
+		if (macro != -1 && macro != aiptek->lastMacro) {
 			input_report_key(inputdev, macroKeyEvents[macro], 1);
-			input_report_rel(inputdev, ABS_MISC,
-					 p | AIPTEK_REPORT_TOOL_MOUSE);
-			input_sync(inputdev);
+			aiptek->lastMacro = macro;
 		}
+
+		input_report_abs(inputdev, ABS_MISC,
+				 p | AIPTEK_REPORT_TOOL_MOUSE);
+		input_sync(inputdev);
 	}
 	/* We have no idea which tool can generate a report 6. Theoretically,
 	 * neither need to, having been given reports 4 & 5 for such use.
@@ -1710,6 +1704,7 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	aiptek->inDelay = 0;
 	aiptek->endDelay = 0;
 	aiptek->previousJitterable = 0;
+	aiptek->lastMacro = -1;
 
 	/* Set up the curSettings struct. Said struct contains the current
 	 * programmable parameters. The newSetting struct contains changes