I managed to emulate the event on sony xperia LT26i
by using
adb shell getevent | grep event2
to capture input and then converting all values from hex to decimal,
and by putting the generated sequence in a shellscript
adb shell sendevent /dev/input/event2 3 57 23710
adb shell sendevent /dev/input/event2 3 53 329
adb shell sendevent /dev/input/event2 3 54 1183
adb shell sendevent /dev/input/event2 3 52 0
adb shell sendevent /dev/input/event2 0 0 0
adb shell sendevent /dev/input/event2 3 57 4294967295
adb shell sendevent /dev/input/event2 0 0 0
I figured from posts in linked forum that line 2 and 3 are setting X and Y position
the next 2 lines are touch press and the bottom 2 lines are touch release, I havent figured out what the first line does yet but it is needed for it to work.
I hope this is useful to you