mibuild/lattice: use new Toolchain/Platform architecture

mibuild/lattice/__init__.py

@@ -0,0 +1,2 @@
+from mibuild.lattice.platform import LatticePlatform
+from mibuild.lattice.programmer import LatticeProgrammer

mibuild/lattice/common.py

@@ -0,0 +1 @@
+lattice_special_overrides = {}

mibuild/lattice/diamond.py

@@ -5,7 +5,9 @@ import os, subprocess, shutil
 
 from migen.fhdl.structure import _Fragment
 from mibuild.generic_platform import *
+
 from mibuild import tools
+from mibuild.lattice import common
 
 def _format_constraint(c):
 	if isinstance(c, Pins):
@@ -61,23 +63,22 @@ def _run_diamond(build_name, source, ver=None):
 	if r != 0:
 		raise OSError("Subprocess failed")
 
-class LatticeDiamondPlatform(GenericPlatform):
-	bitstream_ext = ".bit"
-	def build(self, fragment, build_dir="build", build_name="top",
+class LatticeDiamondToolchain:
+	def build(self, platform, fragment, build_dir="build", build_name="top",
 			diamond_path="/opt/Diamond", run=True):
 		tools.mkdir_noerror(build_dir)
 		os.chdir(build_dir)
 
 		if not isinstance(fragment, _Fragment):
 			fragment = fragment.get_fragment()
-		self.finalize(fragment)
+		platform.finalize(fragment)
 
-		v_src, vns = self.get_verilog(fragment)
-		named_sc, named_pc = self.resolve_signals(vns)
+		v_src, vns = platform.get_verilog(fragment)
+		named_sc, named_pc = platform.resolve_signals(vns)
 		v_file = build_name + ".v"
 		tools.write_to_file(v_file, v_src)
-		sources = self.sources + [(v_file, "verilog")]
-		_build_files(self.device, sources, self.verilog_include_paths, build_name)
+		sources = platform.sources + [(v_file, "verilog")]
+		_build_files(platform.device, sources, platform.verilog_include_paths, build_name)
 
 		tools.write_to_file(build_name + ".lpf", _build_lpf(named_sc, named_pc))
 
@@ -88,6 +89,6 @@ class LatticeDiamondPlatform(GenericPlatform):
 
 		return vns
 
-	def add_period_constraint(self, clk, period):
+	def add_period_constraint(self, platform, clk, period):
 		# TODO: handle differential clk
-		self.add_platform_command("""FREQUENCY PORT "{clk}" {freq} MHz;""".format(freq=str(float(1/period)*1000), clk="{clk}"), clk=clk)
+		platform.add_platform_command("""FREQUENCY PORT "{clk}" {freq} MHz;""".format(freq=str(float(1/period)*1000), clk="{clk}"), clk=clk)

mibuild/lattice/platform.py

@@ -0,0 +1,25 @@
+from mibuild.generic_platform import GenericPlatform
+from mibuild.lattice import common, diamond
+
+class LatticePlatform(GenericPlatform):
+	bitstream_ext = ".bit"
+
+	def __init__(self, *args, toolchain="diamond", **kwargs):
+		GenericPlatform.__init__(self, *args, **kwargs)
+		if toolchain == "diamond":
+			self.toolchain = diamond.LatticeDiamondToolchain()
+		else:
+			raise ValueError("Unknown toolchain")
+
+	def get_verilog(self, *args, special_overrides=dict(), **kwargs):
+		so = dict(common.lattice_special_overrides)
+		so.update(special_overrides)
+		return GenericPlatform.get_verilog(self, *args, special_overrides=so, **kwargs)
+
+	def build(self, *args, **kwargs):
+		return self.toolchain.build(self, *args, **kwargs)
+
+	def add_period_constraint(self, clk, period):
+		if hasattr(clk, "p"):
+			clk = clk.p
+		self.toolchain.add_period_constraint(self, clk, period)

mibuild/platforms/versa.py

@@ -2,7 +2,7 @@
 # License: BSD
 
 from mibuild.generic_platform import *
-from mibuild.lattice.diamond import LatticeDiamondPlatform
+from mibuild.lattice import LatticePlatform
 from mibuild.lattice.programmer import LatticeProgrammer
 
 _io = [
@@ -23,12 +23,12 @@ _io = [
 	),
 ]
 
-class Platform(LatticeDiamondPlatform):
+class Platform(LatticePlatform):
 	default_clk_name = "clk100"
 	default_clk_period = 10
 
 	def __init__(self):
-		LatticeDiamondPlatform.__init__(self, "LFE3-35EA-6FN484C", _io)
+		LatticePlatform.__init__(self, "LFE3-35EA-6FN484C", _io)
 
 	def create_programmer(self):
 		return LatticeProgrammer()