--- /root/touch/usbtouchscreen.c.org	2008-09-16 15:32:40.000000000 +0200
+++ drivers/input/touchscreen/usbtouchscreen.c	2008-09-23 10:26:43.000000000 +0200
@@ -59,6 +59,49 @@
 module_param(swap_xy, bool, 0644);
 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
 
+static int flip_x;
+module_param(flip_x, bool, 0644);
+MODULE_PARM_DESC(flip_x, "If set X is subtracted from the range_x parameter.");
+
+static int flip_y;
+module_param(flip_y, bool, 0644);
+MODULE_PARM_DESC(flip_y, "If set X is subtracted from the range_x parameter.");
+
+static int transform_xy;
+module_param(transform_xy, bool, 0644);
+MODULE_PARM_DESC(transform_xy, "If set the X-coordinate is computed as\
+ (range_x * (raw_x - min_x))/(max_x-min_x) and similar for the y-coordinate.");
+
+static int min_x;
+module_param(min_x, int, 0644);
+MODULE_PARM_DESC(min_x, "The value of the min_x parameter. See 'transform_xy'\
+ for details.");
+
+static int max_x;
+module_param(max_x, int, 0644);
+MODULE_PARM_DESC(max_x, "The value of the max_x parameter. See 'transform_xy'\
+ for details.");
+
+static int min_y;
+module_param(min_y, int, 0644);
+MODULE_PARM_DESC(min_y, "The value of the min_y parameter. See 'transform_xy'\
+ for details.");
+
+static int max_y;
+module_param(max_y, int, 0644);
+MODULE_PARM_DESC(max_y, "The value of the max_y parameter. See 'transform_xy'\
+ for details.");
+
+static int range_x;
+module_param(range_x, int, 0644);
+MODULE_PARM_DESC(range_x, "The X-coordinate of the output will be in the\
+ interval [0, range_x].");
+
+static int range_y;
+module_param(range_y, int, 0644);
+MODULE_PARM_DESC(range_y, "The Y-coordinate of the output will be in the\
+ interval [0, range_y].");
+
 /* device specifc data/functions */
 struct usbtouch_usb;
 struct usbtouch_device_info {
@@ -672,6 +715,18 @@
 /*****************************************************************************
  * Generic Part
  */
+inline int usbtouch_transform_pkt (int p, int min, int max, int phys)
+{
+  int result = (phys * (p - min))/(max-min);
+  if (result < 0) {
+    return 0;
+  } else if (result > phys) {
+    return phys;
+  } else {
+    return result;
+  }
+}
+
 static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
                                  unsigned char *pkt, int len)
 {
@@ -680,15 +735,27 @@
 	if (!type->read_data(usbtouch, pkt))
 			return;
 
-	input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
-
 	if (swap_xy) {
-		input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
-		input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
-	} else {
-		input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
-		input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
+		int tmp;
+		tmp = usbtouch->x;
+		usbtouch->x = usbtouch->y;
+		usbtouch->y = tmp;
 	}
+
+	if (transform_xy) {
+		usbtouch->x = usbtouch_transform_pkt (usbtouch->x, min_x, max_x, range_x);
+		usbtouch->y = usbtouch_transform_pkt (usbtouch->y, min_y, max_y, range_y);
+	}
+
+	if (flip_x)
+		usbtouch->x = range_x - usbtouch->x;
+
+	if (flip_y)
+		usbtouch->y = range_y - usbtouch->y;
+	
+	input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
+	input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
+	input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
 	if (type->max_press)
 		input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
 	input_sync(usbtouch->input);