mirror of
https://github.com/litex-hub/litex-boards.git
synced 2025-01-03 03:43:36 -05:00
a611f035d6
Moving CRG simplify reset with NaxRiscv debug module and is in fact more logical. Also do some minor updates/cosmetic changes while touching CRG/SoCCore.
186 lines
8.1 KiB
Python
Executable file
186 lines
8.1 KiB
Python
Executable file
#!/usr/bin/env python3
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#
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# This file is part of LiteX-Boards.
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#
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# Copyright (c) 2018-2020 Florent Kermarrec <florent@enjoy-digital.fr>
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# SPDX-License-Identifier: BSD-2-Clause
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import os
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from migen import *
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from migen.genlib.resetsync import AsyncResetSynchronizer
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from litex_boards.platforms import kcu105
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from litex.soc.cores.clock import *
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from litex.soc.integration.soc_core import *
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from litex.soc.integration.builder import *
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from litex.soc.cores.led import LedChaser
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from litedram.modules import EDY4016A
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from litedram.phy import usddrphy
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from liteeth.phy.ku_1000basex import KU_1000BASEX
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from litepcie.phy.uspciephy import USPCIEPHY
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from litepcie.software import generate_litepcie_software
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# CRG ----------------------------------------------------------------------------------------------
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class _CRG(Module):
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def __init__(self, platform, sys_clk_freq):
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self.rst = Signal()
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self.clock_domains.cd_sys = ClockDomain()
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self.clock_domains.cd_sys4x = ClockDomain()
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self.clock_domains.cd_pll4x = ClockDomain()
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self.clock_domains.cd_idelay = ClockDomain()
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self.clock_domains.cd_eth = ClockDomain()
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# # #
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self.submodules.pll = pll = USMMCM(speedgrade=-2)
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self.comb += pll.reset.eq(platform.request("cpu_reset") | self.rst)
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pll.register_clkin(platform.request("clk125"), 125e6)
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pll.create_clkout(self.cd_pll4x, sys_clk_freq*4, buf=None, with_reset=False)
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pll.create_clkout(self.cd_idelay, 200e6)
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pll.create_clkout(self.cd_eth, 200e6)
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platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst.
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self.specials += [
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Instance("BUFGCE_DIV", name="main_bufgce_div",
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p_BUFGCE_DIVIDE=4,
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i_CE=1, i_I=self.cd_pll4x.clk, o_O=self.cd_sys.clk),
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Instance("BUFGCE", name="main_bufgce",
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i_CE=1, i_I=self.cd_pll4x.clk, o_O=self.cd_sys4x.clk),
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]
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self.submodules.idelayctrl = USIDELAYCTRL(cd_ref=self.cd_idelay, cd_sys=self.cd_sys)
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# BaseSoC ------------------------------------------------------------------------------------------
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class BaseSoC(SoCCore):
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def __init__(self, sys_clk_freq=int(125e6), with_ethernet=False, with_etherbone=False,
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eth_ip="192.168.1.50", with_led_chaser=True, with_pcie=False, with_sata=False,
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**kwargs):
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platform = kcu105.Platform()
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# CRG --------------------------------------------------------------------------------------
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self.submodules.crg = _CRG(platform, sys_clk_freq)
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# SoCCore ----------------------------------------------------------------------------------
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SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on KCU105", **kwargs)
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# DDR4 SDRAM -------------------------------------------------------------------------------
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if not self.integrated_main_ram_size:
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self.submodules.ddrphy = usddrphy.USDDRPHY(platform.request("ddram"),
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memtype = "DDR4",
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sys_clk_freq = sys_clk_freq,
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iodelay_clk_freq = 200e6)
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self.add_sdram("sdram",
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phy = self.ddrphy,
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module = EDY4016A(sys_clk_freq, "1:4"),
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size = 0x40000000,
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l2_cache_size = kwargs.get("l2_size", 8192)
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)
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# Ethernet / Etherbone ---------------------------------------------------------------------
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if with_ethernet or with_etherbone:
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self.submodules.ethphy = KU_1000BASEX(self.crg.cd_eth.clk,
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data_pads = self.platform.request("sfp", 0),
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sys_clk_freq = self.clk_freq)
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self.comb += self.platform.request("sfp_tx_disable_n", 0).eq(1)
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self.platform.add_platform_command("set_property SEVERITY {{Warning}} [get_drc_checks REQP-1753]")
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if with_ethernet:
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self.add_ethernet(phy=self.ethphy)
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if with_etherbone:
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self.add_etherbone(phy=self.ethphy, ip_address=eth_ip)
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# PCIe -------------------------------------------------------------------------------------
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if with_pcie:
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self.submodules.pcie_phy = USPCIEPHY(platform, platform.request("pcie_x4"),
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data_width = 128,
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bar0_size = 0x20000)
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self.add_pcie(phy=self.pcie_phy, ndmas=1)
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# SATA -------------------------------------------------------------------------------------
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if with_sata:
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from litex.build.generic_platform import Subsignal, Pins
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from litesata.phy import LiteSATAPHY
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# IOs
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_sata_io = [
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# SFP 2 SATA Adapter / https://shop.trenz-electronic.de/en/TE0424-01-SFP-2-SATA-Adapter
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("sfp2sata", 0,
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Subsignal("tx_p", Pins("U4")),
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Subsignal("tx_n", Pins("U3")),
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Subsignal("rx_p", Pins("T2")),
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Subsignal("rx_n", Pins("T1")),
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),
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]
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platform.add_extension(_sata_io)
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# RefClk, Generate 150MHz from PLL.
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self.clock_domains.cd_sata_refclk = ClockDomain()
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self.crg.pll.create_clkout(self.cd_sata_refclk, 150e6)
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sata_refclk = ClockSignal("sata_refclk")
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platform.add_platform_command("set_property SEVERITY {{Warning}} [get_drc_checks REQP-1753]")
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# PHY
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self.submodules.sata_phy = LiteSATAPHY(platform.device,
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refclk = sata_refclk,
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pads = platform.request("sfp2sata"),
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gen = "gen2",
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clk_freq = sys_clk_freq,
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data_width = 16)
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# Core
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self.add_sata(phy=self.sata_phy, mode="read+write")
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# Leds -------------------------------------------------------------------------------------
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if with_led_chaser:
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self.submodules.leds = LedChaser(
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pads = platform.request_all("user_led"),
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sys_clk_freq = sys_clk_freq)
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# Build --------------------------------------------------------------------------------------------
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def main():
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from litex.soc.integration.soc import LiteXSoCArgumentParser
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parser = LiteXSoCArgumentParser(description="LiteX SoC on KCU105")
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target_group = parser.add_argument_group(title="Target options")
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target_group.add_argument("--build", action="store_true", help="Build bitstream.")
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target_group.add_argument("--load", action="store_true", help="Load bitstream.")
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target_group.add_argument("--sys-clk-freq", default=125e6, help="System clock frequency.")
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ethopts = target_group.add_mutually_exclusive_group()
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ethopts.add_argument("--with-ethernet", action="store_true", help="Enable Ethernet support.")
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ethopts.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support.")
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target_group.add_argument("--eth-ip", default="192.168.1.50", help="Ethernet/Etherbone IP address.")
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target_group.add_argument("--with-pcie", action="store_true", help="Enable PCIe support.")
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target_group.add_argument("--driver", action="store_true", help="Generate PCIe driver.")
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target_group.add_argument("--with-sata", action="store_true", help="Enable SATA support (over SFP2SATA).")
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builder_args(parser)
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soc_core_args(parser)
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args = parser.parse_args()
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soc = BaseSoC(
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sys_clk_freq = int(float(args.sys_clk_freq)),
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with_ethernet = args.with_ethernet,
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with_etherbone = args.with_etherbone,
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eth_ip = args.eth_ip,
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with_pcie = args.with_pcie,
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with_sata = args.with_sata,
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**soc_core_argdict(args)
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)
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builder = Builder(soc, **builder_argdict(args))
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builder.build(run=args.build)
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if args.driver:
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generate_litepcie_software(soc, os.path.join(builder.output_dir, "driver"))
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if args.load:
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prog = soc.platform.create_programmer()
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prog.load_bitstream(builder.get_bitstream_filename(mode="sram"))
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if __name__ == "__main__":
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main()
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