It is possible to use this driver with an ALPS Glidepoint device. If
you use an older 2.6 linux kernel which has no ALPS input driver, you
need to apply the ALPS kernel patch in the alps.patch file. See
http://www.kernelnewbies.org/faq/ for information about how to apply
kernel patches and compile kernels.

Note! If you use kernel 2.6.11 or later, the alps patch is already
included, so you don't have to patch your kernel.

Since ALPS touchpads don't have the same resolution as Synaptics
touchpads, you probably have to change some parameter values. Here is
an example InputDevice section for the X configuration file.

Section "InputDevice"
  Driver	"synaptics"
  Identifier	"Mouse[1]"
  Option	"Device"		"/dev/psaux"
  Option	"Protocol"		"auto-dev"
# enable SHMConfig if you want to enable synclient
# NB: enabling SHMConfig is insecure, since any user can invoke it
#  Option	 "SHMConfig"		 "on"
  Option	"LeftEdge"		"120"
  Option	"RightEdge"		"830"
  Option	"TopEdge"		"120"
  Option	"BottomEdge"		"650"
  Option	"FingerLow"		"14"
  Option	"FingerHigh"		"15"
  Option	"MaxTapTime"		"180"
  Option	"MaxTapMove"		"110"
  Option	"EmulateMidButtonTime"	"75"
  Option	"VertScrollDelta"	"20"
  Option	"HorizScrollDelta"	"20"
  Option	"CornerCoasting"	"1"
  Option	"CoastingSpeed"		"3"
  Option	"MinSpeed"		"0.3"
  Option	"MaxSpeed"		"0.75"
  Option	"AccelFactor"		"0.015"
  Option	"EdgeMotionMinSpeed"	"200"
  Option	"EdgeMotionMaxSpeed"	"200"
  Option	"UpDownScrolling"	"1"
  Option	"CircularScrolling"	"1"
  Option	"CircScrollDelta"	"0.1"
  Option	"CircScrollTrigger"	"2"
EndSection

If you use a 2.4 linux kernel, you don't need to patch the kernel, but
you should instead set "Protocol" like this:

  Option	"Protocol"		"alps"


On some (all?) ALPS hardware, it is not possible to disable tapping
unless you apply the patch below. However, some users have reported
that this patch breaks tap-and-drag operations, which is why the patch
is not included in the main alps.patch file.

--- linux/drivers/input/mouse/alps.c~alps-test3	2004-02-28 20:46:34.000000000 +0100
+++ linux-petero/drivers/input/mouse/alps.c	2004-02-28 20:49:12.000000000 +0100
@@ -87,6 +87,10 @@ static void ALPS_process_packet(struct p
 	y = (packet[4] & 0x7f) | ((packet[3] & 0x70)<<(7-4));
 	z = packet[5];
 
+	if (packet[2] & 1) {
+		z = 35;
+	}
+
 	if (z > 0) {
 		input_report_abs(dev, ABS_X, x);
 		input_report_abs(dev, ABS_Y, y);
@@ -97,7 +101,6 @@ static void ALPS_process_packet(struct p
 	if (z > 30) input_report_key(dev, BTN_TOUCH, 1);
 	if (z < 25) input_report_key(dev, BTN_TOUCH, 0);
 
-	left  |= (packet[2]     ) & 1;
 	left  |= (packet[3]     ) & 1;
 	right |= (packet[3] >> 1) & 1;
 	if (packet[0] == 0xff) {