tcl/interface/ftdi: add support for Sipeed USB-JTAG/TTL Debugger

Sipeed USB-JTAG/TTL Debugger is a compact FT2232D-based JTAG adapter.

Change-Id: Ibc9075723f47cd9b49ba4bb39e3d292e7d80bed7
Signed-off-by: Jun Yan <jerrysteve1101@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/8472
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: jenkins

tcl/interface/ftdi/sipeed-usb-jtag-debugger.cfg

@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+#
+# Sipeed USB-JTAG/TTL RISC-V Debugger
+#
+# https://www.seeedstudio.com/Sipeed-USB-JTAG-TTL-RISC-V-Debugger-p-2910.html
+#
+
+adapter driver ftdi
+ftdi device_desc "Dual RS232"
+ftdi vid_pid 0x0403 0x6010
+ftdi channel 0
+
+# Every pin set as high impedance except TCK, TDI, TDO, TMS and RST
+ftdi layout_init 0x0028 0x002b
+
+transport select jtag
+
+# nSRST defined on pin RST of the Debugger (pin ADBUS5 [AD5] on the FT2232D chip)
+ftdi layout_signal nSRST -data 0x0020 -oe 0x0020