From d9fe5fffe15be57d6a1df8d18705937930a1d4ed Mon Sep 17 00:00:00 2001
From: Cole Poirier <colepoirier@gmail.com>
Date: Wed, 16 Sep 2020 13:44:38 -0700
Subject: [PATCH] add template file/starting point (copy of
 litex/boards/platforms/ulx3s.py) for asic platform that derives from generic
 platform for 180nm tapeout

---
 src/soc/litex/florent/libresoc/ls180.py | 127 ++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 src/soc/litex/florent/libresoc/ls180.py

diff --git a/src/soc/litex/florent/libresoc/ls180.py b/src/soc/litex/florent/libresoc/ls180.py
new file mode 100644
index 00000000..faf26ca7
--- /dev/null
+++ b/src/soc/litex/florent/libresoc/ls180.py
@@ -0,0 +1,127 @@
+#
+# This file is part of LiteX.
+#
+# Copyright (c) 2018-2019 Florent Kermarrec <florent@enjoy-digital.fr>
+# SPDX-License-Identifier: BSD-2-Clause
+
+from litex.build.generic_platform import *
+from litex.build.lattice import LatticePlatform
+from litex.build.lattice.programmer import UJProg
+
+# IOs ----------------------------------------------------------------------------------------------
+
+_io = [
+    ("clk25", 0, Pins("G2"), IOStandard("LVCMOS33")),
+    ("rst",   0, Pins("R1"), IOStandard("LVCMOS33")),
+
+    ("user_led", 0, Pins("B2"), IOStandard("LVCMOS33")),
+    ("user_led", 1, Pins("C2"), IOStandard("LVCMOS33")),
+    ("user_led", 2, Pins("C1"), IOStandard("LVCMOS33")),
+    ("user_led", 3, Pins("D2"), IOStandard("LVCMOS33")),
+    ("user_led", 4, Pins("D1"), IOStandard("LVCMOS33")),
+    ("user_led", 5, Pins("E2"), IOStandard("LVCMOS33")),
+    ("user_led", 6, Pins("E1"), IOStandard("LVCMOS33")),
+    ("user_led", 7, Pins("H3"), IOStandard("LVCMOS33")),
+
+    ("serial", 0,
+        Subsignal("tx", Pins("L4"), IOStandard("LVCMOS33")),
+        Subsignal("rx", Pins("M1"), IOStandard("LVCMOS33"))
+    ),
+
+    ("spisdcard", 0,
+        Subsignal("clk",  Pins("J1")),
+        Subsignal("mosi", Pins("J3"), Misc("PULLMODE=UP")),
+        Subsignal("cs_n", Pins("H1"), Misc("PULLMODE=UP")),
+        Subsignal("miso", Pins("K2"), Misc("PULLMODE=UP")),
+        Misc("SLEWRATE=FAST"),
+        IOStandard("LVCMOS33"),
+    ),
+
+    ("sdcard", 0,
+        Subsignal("clk",  Pins("J1")),
+        Subsignal("cmd",  Pins("J3"), Misc("PULLMODE=UP")),
+        Subsignal("data", Pins("K2 K1 H2 H1"), Misc("PULLMODE=UP")),
+        Misc("SLEWRATE=FAST"),
+        IOStandard("LVCMOS33"),
+    ),
+
+    ("sdram_clock", 0, Pins("F19"), IOStandard("LVCMOS33")),
+    ("sdram", 0,
+        Subsignal("a",     Pins(
+            "M20 M19 L20 L19 K20 K19 K18 J20",
+            "J19 H20 N19 G20 G19")),
+        Subsignal("dq",    Pins(
+            "J16 L18 M18 N18 P18 T18 T17 U20",
+            "E19 D20 D19 C20 E18 F18 J18 J17")),
+        Subsignal("we_n",  Pins("T20")),
+        Subsignal("ras_n", Pins("R20")),
+        Subsignal("cas_n", Pins("T19")),
+        Subsignal("cs_n",  Pins("P20")),
+        Subsignal("cke",   Pins("F20")),
+        Subsignal("ba",    Pins("P19 N20")),
+        Subsignal("dm",    Pins("U19 E20")),
+        IOStandard("LVCMOS33"),
+        Misc("SLEWRATE=FAST"),
+    ),
+
+    ("wifi_gpio0", 0, Pins("L2"), IOStandard("LVCMOS33")),
+
+    ("ext0p", 0, Pins("B11"), IOStandard("LVCMOS33")),
+    ("ext1p", 0, Pins("A10"), IOStandard("LVCMOS33")),
+
+    ("gpio", 0,
+        Subsignal("p", Pins("B11")),
+        Subsignal("n", Pins("C11")),
+        IOStandard("LVCMOS33")
+    ),
+    ("gpio", 1,
+        Subsignal("p", Pins("A10")),
+        Subsignal("n", Pins("A11")),
+        IOStandard("LVCMOS33")
+    ),
+    ("gpio", 2,
+        Subsignal("p", Pins("A9")),
+        Subsignal("n", Pins("B10")),
+        IOStandard("LVCMOS33")
+    ),
+    ("gpio", 3,
+        Subsignal("p", Pins("B9")),
+        Subsignal("n", Pins("C10")),
+        IOStandard("LVCMOS33")
+    ),
+
+    ("usb", 0,
+        Subsignal("d_p", Pins("D15")),
+        Subsignal("d_n", Pins("E15")),
+        Subsignal("pullup", Pins("B12 C12")),
+        IOStandard("LVCMOS33")
+    ),
+    ("oled_spi", 0,
+        Subsignal("clk",  Pins("P4")),
+        Subsignal("mosi", Pins("P3")),
+        IOStandard("LVCMOS33"),
+    ),
+    ("oled_ctl", 0,
+        Subsignal("dc",   Pins("P1")),
+        Subsignal("resn", Pins("P2")),
+        Subsignal("csn",  Pins("N2")),
+        IOStandard("LVCMOS33"),
+    ),
+]
+
+# Platform -----------------------------------------------------------------------------------------
+
+class Platform(LatticePlatform):
+    default_clk_name   = "clk25"
+    default_clk_period = 1e9/25e6
+
+    def __init__(self, device="LFE5U-45F", **kwargs):
+        assert device in ["LFE5U-25F", "LFE5U-45F", "LFE5U-85F"]
+        LatticePlatform.__init__(self, device + "-6BG381C", _io, **kwargs)
+
+    def create_programmer(self):
+        return UJProg()
+
+    def do_finalize(self, fragment):
+        LatticePlatform.do_finalize(self, fragment)
+        self.add_period_constraint(self.lookup_request("clk25", loose=True), 1e9/25e6)
-- 
2.30.2