targets: Add initial litex_acorn_baseboard_mini target from acorn_baseboard repository.

litex_boards/targets/litex_acorn_baseboard_mini.py

@@ -0,0 +1,154 @@
+#!/usr/bin/env python3
+
+#
+# This file is part of LiteX-Boards.
+#
+# Copyright (c) 2021-2024 Florent Kermarrec <florent@enjoy-digital.fr>
+# SPDX-License-Identifier: BSD-2-Clause
+
+# Build/Use ----------------------------------------------------------------------------------------
+
+import os
+
+from migen import *
+
+from litex.gen import LiteXModule
+
+from litex_boards.platforms import sqrl_acorn
+
+from litex.soc.interconnect.csr import *
+from litex.soc.integration.soc_core import *
+from litex.soc.integration.builder import *
+
+from litex.soc.cores.clock import *
+from litex.soc.cores.led import LedChaser
+
+from litex.build.generic_platform import Subsignal, Pins
+from liteeth.phy.a7_gtp import QPLLSettings, QPLL
+from liteeth.phy.a7_1000basex import A7_1000BASEX
+
+# CRG ----------------------------------------------------------------------------------------------
+
+class CRG(Module):
+    def __init__(self, platform, sys_clk_freq):
+        self.rst = Signal()
+        self.clock_domains.cd_sys    = ClockDomain()
+        self.clock_domains.cd_idelay = ClockDomain()
+
+        # Clk/Rst
+        clk200 = platform.request("clk200")
+
+        # PLL
+        self.submodules.pll = pll = S7PLL()
+        self.comb += pll.reset.eq(self.rst)
+        pll.register_clkin(clk200, 200e6)
+        pll.create_clkout(self.cd_sys, sys_clk_freq, margin=0)
+        # Ignore sys_clk to pll.clkin path created by SoC's rst.
+        platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin)
+
+# BaseSoC -----------------------------------------------------------------------------------------
+
+class BaseSoC(SoCMini):
+    def __init__(self, variant="cle-215+", sys_clk_freq=156.25e6, with_led_chaser=True, **kwargs):
+        platform = sqrl_acorn.Platform(variant=variant)
+        assert sys_clk_freq == 156.25e6
+
+        # SoCCore ----------------------------------------------------------------------------------
+        SoCMini.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Acorn CLE-101/215(+)")
+
+        # CRG --------------------------------------------------------------------------------------
+        self.submodules.crg = CRG(platform, sys_clk_freq)
+
+        # Etherbone --------------------------------------------------------------------------------
+
+        _eth_io = [
+            ("sfp", 0,
+                Subsignal("txp", Pins("D5")),
+                Subsignal("txn", Pins("C5")),
+                Subsignal("rxp", Pins("D11")),
+                Subsignal("rxn", Pins("C11")),
+            ),
+            ("sfp", 1,
+                Subsignal("txp", Pins("B4")),
+                Subsignal("txn", Pins("A4")),
+                Subsignal("rxp", Pins("B8")),
+                Subsignal("rxn", Pins("A8")),
+            ),
+        ]
+        platform.add_extension(_eth_io)
+
+        # phy
+        qpll_settings = QPLLSettings(
+            refclksel  = 0b001,
+            fbdiv      = 4,
+            fbdiv_45   = 4,
+            refclk_div = 1
+        )
+        qpll = QPLL(ClockSignal("sys"), qpll_settings)
+        print(qpll)
+        self.submodules += qpll
+
+        self.ethphy0 = A7_1000BASEX(
+            qpll_channel = qpll.channels[0],
+            data_pads    = self.platform.request("sfp", 0),
+            sys_clk_freq = self.clk_freq,
+            rx_polarity  = 1,  # Inverted on Acorn
+            tx_polarity  = 0   # Inverted on Acorn and on baseboard.
+        )
+        platform.add_platform_command("set_property SEVERITY {{Warning}} [get_drc_checks REQP-49]")
+        self.add_etherbone(name="etherbone0",
+            phy         = self.ethphy0,
+            phy_cd      = "ethphy0_eth",
+            mac_address = 0x10e2d5000000,
+            ip_address  = "192.168.1.50"
+        )
+
+        self.ethphy1 = A7_1000BASEX(
+            qpll_channel = qpll.channels[0],
+            data_pads    = self.platform.request("sfp", 1),
+            sys_clk_freq = self.clk_freq,
+            rx_polarity  = 1,  # Inverted on Acorn
+            tx_polarity  = 0   # Inverted on Acorn and on baseboard.
+        )
+        platform.add_platform_command("set_property SEVERITY {{Warning}} [get_drc_checks REQP-49]")
+        self.add_etherbone(name="etherbone1",
+            phy         = self.ethphy1,
+            phy_cd      = "ethphy1_eth",
+            mac_address = 0x10e2d5000001,
+            ip_address  = "192.168.1.51"
+        )
+
+        # Leds -------------------------------------------------------------------------------------
+        if with_led_chaser:
+            self.submodules.leds = LedChaser(
+                pads         = platform.request_all("user_led"),
+                sys_clk_freq = sys_clk_freq)
+
+# Build --------------------------------------------------------------------------------------------
+
+def main():
+    from litex.build.parser import LiteXArgumentParser
+    parser = LiteXArgumentParser(platform=sqrl_acorn.Platform, description="LiteX SoC on Acorn CLE-101/215(+).")
+    parser.add_target_argument("--flash",           action="store_true",       help="Flash bitstream.")
+    parser.add_target_argument("--variant",         default="cle-215+",        help="Board variant (cle-215+, cle-215 or cle-101).")
+    args = parser.parse_args()
+
+    soc = BaseSoC(
+        variant = args.variant,
+        **parser.soc_argdict
+    )
+
+    builder  = Builder(soc, **parser.builder_argdict)
+    if args.build:
+        builder.build(**parser.toolchain_argdict)
+
+    if args.load:
+        prog = soc.platform.create_programmer()
+        prog.load_bitstream(builder.get_bitstream_filename(mode="sram"))
+
+    if args.flash:
+        prog = soc.platform.create_programmer()
+        prog.flash(0, builder.get_bitstream_filename(mode="flash"))
+
+if __name__ == "__main__":
+    main()