$ dist/litex_server --jtag --jtag-config /usr/share/trellis/misc/openocd/trellisboard.cfg
Open On-Chip Debugger 0.10.0
Licensed under GNU GPL v2
For bug reports, read
	http://openocd.org/doc/doxygen/bugs.html
none separate
adapter speed: 5000 kHz
Info : auto-selecting first available session transport "jtag". To override use 'transport select <transport>'.
jtagstream_serve
Info : clock speed 5000 kHz
Info : JTAG tap: ecp5.tap tap/device found: 0x81113043 (mfg: 0x021 (Lattice Semi.), part: 0x1113, ver: 0x8)
Warn : gdb services need one or more targets defined
can't read "_CHIPNAME": no such variable
Process Process-1:
Traceback (most recent call last):
  File "multiprocessing/process.py", line 315, in _bootstrap
  File "multiprocessing/process.py", line 108, in run
  File "litex/tools/litex_term.py", line 152, in jtag2tcp
  File "litex/build/openocd.py", line 147, in stream
  File "litex/build/generic_programmer.py", line 100, in call
OSError: Error occured during OpenOCD's call, please check:
- OpenOCD installation.
- access permissions.
- hardware and cable.
Traceback (most recent call last):
  File "litex/tools/litex_server.py", line 278, in <module>
  File "litex/tools/litex_server.py", line 216, in main
  File "litex/tools/litex_term.py", line 141, in open
ConnectionRefusedError: [Errno 111] Connection refused
[242105] Failed to execute script litex_server