build/altera/quartus: Add .svf generation (required for now with open…

…FPGALoader) and create_rbf property.

litex/build/altera/platform.py

@@ -18,6 +18,7 @@ class AlteraPlatform(GenericPlatform):
         "flash" : ".rbf"
     }
     create_rbf    = True
+    create_svf    = True
 
     _supported_toolchains = ["quartus"]
 

litex/build/altera/quartus.py

@@ -192,6 +192,8 @@ def build_script(self):
 quartus_fit --read_settings_files=off --write_settings_files=off {build_name} -c {build_name}
 quartus_asm --read_settings_files=off --write_settings_files=off {build_name} -c {build_name}
 quartus_sta {build_name} -c {build_name}"""
+
+        # Create .rbf.
         if self.platform.create_rbf:
             if sys.platform in ["win32", "cygwin"]:
               script_contents += """
@@ -205,6 +207,21 @@ def build_script(self):
 then
     quartus_cpf -c {build_name}.sof {build_name}.rbf
 fi
+"""
+        # Create .svf.
+        if self.platform.create_svf:
+            if sys.platform in ["win32", "cygwin"]:
+              script_contents += """
+if exist "{build_name}.sof" (
+    quartus_cpf -c -q \"12.0MHz\" -g 3.3 -n p {build_name}.sof {build_name}.svf
+)
+"""
+            else:
+              script_contents += """
+if [ -f "{build_name}.sof" ]
+then
+    quartus_cpf -c -q \"12.0MHz\" -g 3.3 -n p {build_name}.sof {build_name}.svf
+fi
 """
         script_contents = script_contents.format(build_name=build_name, synth_tool=self._synth_tool)
         tools.write_to_file(script_file, script_contents, force_unix=True)