bench: Add XCU1525 bench (compiles but not yet working on hardware).

bench/xcu1525.py

@@ -0,0 +1,102 @@
+#!/usr/bin/env python3
+
+#
+# This file is part of LiteEth.
+#
+# Copyright (c) 2021 Florent Kermarrec <florent@enjoy-digital.fr>
+# SPDX-License-Identifier: BSD-2-Clause
+
+import os
+import argparse
+
+from migen import *
+from migen.genlib.resetsync import AsyncResetSynchronizer
+
+from litex.build.generic_platform import *
+from litex_boards.platforms import xcu1525
+
+from litex.soc.cores.clock import *
+from litex.soc.interconnect.csr import *
+from litex.soc.integration.soc_core import *
+from litex.soc.integration.builder import *
+
+from liteeth.phy.usp_1000basex import USP_1000BASEX
+
+# IOs ----------------------------------------------------------------------------------------------
+
+_qsfp_io = [
+    # QSFP0
+    ("qsfp_fs", 0, Pins("AT20 AU22"), IOStandard("LVCMOS12")),
+    ("qsfp", 0,
+        Subsignal("txp", Pins("N9")),
+        Subsignal("txn", Pins("N8")),
+        Subsignal("rxp", Pins("N4")),
+        Subsignal("rxn", Pins("N3"))
+    ),
+]
+
+# CRG ----------------------------------------------------------------------------------------------
+
+class _CRG(Module, AutoCSR):
+    def __init__(self, platform, sys_clk_freq):
+        self.clock_domains.cd_sys     = ClockDomain()
+        self.clock_domains.cd_eth     = ClockDomain()
+
+        # # #
+
+        # Main PLL.
+        self.submodules.main_pll = main_pll = USPMMCM(speedgrade=-2)
+        main_pll.register_clkin(platform.request("clk300"), 300e6)
+        main_pll.create_clkout(self.cd_sys, sys_clk_freq)
+        main_pll.create_clkout(self.cd_eth, 200e6)
+
+# Bench SoC ----------------------------------------------------------------------------------------
+
+class BenchSoC(SoCCore):
+    def __init__(self, sys_clk_freq=int(125e6)):
+        platform = xcu1525.Platform()
+        platform.add_extension(_qsfp_io)
+
+        # SoCMini ----------------------------------------------------------------------------------
+        SoCMini.__init__(self, platform, clk_freq=sys_clk_freq,
+            ident          = "LiteEth bench on XCU1525",
+            ident_version  = True
+        )
+
+        # CRG --------------------------------------------------------------------------------------
+        self.submodules.crg = _CRG(platform, sys_clk_freq)
+
+        # Etherbone --------------------------------------------------------------------------------
+        self.submodules.ethphy = USP_1000BASEX(self.crg.cd_eth.clk,
+            data_pads    = self.platform.request("qsfp", 0),
+            sys_clk_freq = self.clk_freq)
+        self.comb += self.platform.request("qsfp_fs").eq(0b01)
+        self.add_etherbone(phy=self.ethphy, buffer_depth=255)
+
+        # SRAM -------------------------------------------------------------------------------------
+        self.add_ram("sram", 0x20000000, 0x1000)
+
+        # Leds -------------------------------------------------------------------------------------
+        from litex.soc.cores.led import LedChaser
+        self.submodules.leds = LedChaser(
+            pads         = platform.request_all("user_led"),
+            sys_clk_freq = sys_clk_freq)
+
+# Main ---------------------------------------------------------------------------------------------
+
+def main():
+    parser = argparse.ArgumentParser(description="LiteEth Bench on XCU1525")
+    parser.add_argument("--build",       action="store_true", help="Build bitstream")
+    parser.add_argument("--load",        action="store_true", help="Load bitstream")
+    args = parser.parse_args()
+
+    soc     = BenchSoC()
+    builder = Builder(soc, csr_csv="csr.csv")
+    builder.build(run=args.build)
+
+    if args.load:
+        prog = soc.platform.create_programmer()
+        prog.load_bitstream(os.path.join(builder.gateware_dir, soc.build_name + ".bit"))
+
+if __name__ == "__main__":
+    main()