diff --git a/drivers/input/mouse/atarimouse.c b/drivers/input/mouse/atarimouse.c
index 16a9d0ffab8a..5c4a692bf73a 100644
--- a/drivers/input/mouse/atarimouse.c
+++ b/drivers/input/mouse/atarimouse.c
@@ -77,15 +77,15 @@ static void atamouse_interrupt(char *buf)
 #endif
 
 	/* only relative events get here */
-	dx =  buf[1];
-	dy = -buf[2];
+	dx = buf[1];
+	dy = buf[2];
 
 	input_report_rel(atamouse_dev, REL_X, dx);
 	input_report_rel(atamouse_dev, REL_Y, dy);
 
-	input_report_key(atamouse_dev, BTN_LEFT,   buttons & 0x1);
+	input_report_key(atamouse_dev, BTN_LEFT,   buttons & 0x4);
 	input_report_key(atamouse_dev, BTN_MIDDLE, buttons & 0x2);
-	input_report_key(atamouse_dev, BTN_RIGHT,  buttons & 0x4);
+	input_report_key(atamouse_dev, BTN_RIGHT,  buttons & 0x1);
 
 	input_sync(atamouse_dev);