build/openocd: Allow config file to be searched from local dirs

To sort out path for boards using OpenOCD config file shipped with
OpenOCD itself.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>

litex/build/generic_programmer.py

@@ -24,6 +24,7 @@ class GenericProgrammer:
         self.flash_proxy_repos = [
             "https://github.com/quartiq/bscan_spi_bitstreams/raw/master/",
         ]
+        self.config_dirs = ["prog"]
         self.config_repos = [
             "https://raw.githubusercontent.com/litex-hub/litex-boards/master/litex_boards/prog/",
         ]
@@ -65,9 +66,11 @@ class GenericProgrammer:
         if os.path.exists(fullname):
             return self.config
         # Search in local config directory
-        fullname = tools.cygpath(os.path.join(self.prog_local, self.config))
-        if os.path.exists(fullname):
-            return fullname
+        for d in self.config_dirs:
+            fulldir  = os.path.abspath(os.path.expanduser(d))
+            fullname = tools.cygpath(os.path.join(fulldir, self.config))
+            if os.path.exists(fullname):
+                return fullname
         # Search in repositories and download it
         import requests
         os.makedirs(self.prog_local, exist_ok=True)

litex/build/openocd.py

@@ -17,6 +17,8 @@ class OpenOCD(GenericProgrammer):
     def __init__(self, config, flash_proxy_basename=None):
         GenericProgrammer.__init__(self, flash_proxy_basename)
         self.config = config
+        self.config_dirs.append("/usr/share/openocd/scripts")
+        self.config_dirs.append("/usr/local/share/openocd/scripts")
 
     def load_bitstream(self, bitstream):
         config = self.find_config()