Unbricking, step #1, collecting necessary tools
Got my hands on neo freerunner debug board (here's its photo), it has place for 20 pin jtag connector (I need to find one and solder it).
Thanks to max_posedon who borrowed this board to me :)
The only missing thing now is screw driver, as I have no screw driver for such small screws... I'm going to find and buy it tomorrow :)