tcl/interface/ftdi: Add Steppenprobe open hardware interface

https://github.com/diegoherranz/steppenprobe

Change-Id: Ief2c3f4a8707fa628650697d93893b2355015898
Signed-off-by: Diego Herranz <diegoherranz@diegoherranz.com>
Reviewed-on: http://openocd.zylin.com/5653
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

diff --git a/tcl/interface/ftdi/steppenprobe.cfg b/tcl/interface/ftdi/steppenprobe.cfg
new file mode 100755 (executable)
index 0000000..7b5b9a0
--- /dev/null
+++ b/tcl/interface/ftdi/steppenprobe.cfg
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+#
+# Steppenprobe
+# https://github.com/diegoherranz/steppenprobe
+#
+
+adapter driver ftdi
+ftdi_vid_pid 0x0403 0x6010
+
+# Initial Layout
+ftdi_layout_init 0x0058 0x99fb
+# Signal        Data    Direction       Notes
+# TCK           0       1 (out)
+# TDI           0       1 (out)
+# TDO           0       0 (in)
+# TMS           1       1 (out)         JTAG IEEE std recommendation
+# LED           1       1 (out)         LED off
+# SWD_EN        0       1 (out)         OpenOCD sets this high for SWD
+# SWDIO_OE      1       1 (out)         Ext. buffer tristated
+# SRST          0       1 (out)         Translates to nSRST=Z
+
+# Unused        0       1 (out)
+# GPIO_A        0       0 (in)
+# GPIO_B        0       0 (in)
+# Unused        0       1 (out)
+# Unused        0       1 (out)
+# GPIO_C        0       0 (in)
+# GPIO_D        0       0 (in)
+# Unused        0       1 (out)
+
+# Signals definition
+ftdi_layout_signal LED -ndata 0x0010
+ftdi_layout_signal SWD_EN -data 0x0020
+ftdi_layout_signal SWDIO_OE -ndata 0x0040
+ftdi_layout_signal nSRST -oe 0x0080
+
+ftdi_layout_signal GPIO_A -data 0x0200 -oe 0x0200 -input 0x0200
+ftdi_layout_signal GPIO_B -data 0x0400 -oe 0x0400 -input 0x0400
+ftdi_layout_signal GPIO_C -data 0x2000 -oe 0x2000 -input 0x2000
+ftdi_layout_signal GPIO_D -data 0x4000 -oe 0x4000 -input 0x4000