#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2023 John Simons # SPDX-License-Identifier: BSD-2-Clause import os from migen import * from litex.gen import * from litex_boards.platforms import alinx_axau15 from litex.soc.cores.clock import * from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litex.soc.cores.led import LedChaser from litedram.modules import MT40A512M16 from litedram.phy import usddrphy from liteeth.phy.usrgmii import LiteEthPHYRGMII from litepcie.phy.usppciephy import USPPCIEPHY from litepcie.software import generate_litepcie_software # CRG ---------------------------------------------------------------------------------------------- class _CRG(LiteXModule): def __init__(self, platform, sys_clk_freq): self.rst = Signal() self.cd_sys = ClockDomain() self.cd_sys4x = ClockDomain() self.cd_idelay = ClockDomain() # # # # Clk. clk200 = platform.request("clk200") # PLL. self.pll = pll = USMMCM(speedgrade=-2) self.comb += pll.reset.eq(self.rst) pll.register_clkin(clk200, 200e6) pll.create_clkout(self.cd_sys, sys_clk_freq, with_reset=False) pll.create_clkout(self.cd_sys4x, 4*sys_clk_freq) platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst. # IDelayCtrl. self.idelayctrl = USIDELAYCTRL(cd_ref=self.cd_sys4x, cd_sys=self.cd_sys) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, sys_clk_freq=int(125e6), with_ethernet = False, with_etherbone = False, eth_ip = "192.168.1.50", remote_ip = None, with_led_chaser = True, with_pcie = False, pcie_speed="gen3", with_sdcard = False, **kwargs): platform = alinx_axau15.Platform() # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Alinx AXAU15", **kwargs) # DDR4 SDRAM ------------------------------------------------------------------------------- if not self.integrated_main_ram_size: self.ddrphy = usddrphy.USPDDRPHY(platform.request("ddram"), memtype = "DDR4", sys_clk_freq = sys_clk_freq, iodelay_clk_freq = 500e6 ) self.add_sdram("sdram", phy = self.ddrphy, module = MT40A512M16(sys_clk_freq, "1:4"), size = 0x40000000, l2_cache_size = kwargs.get("l2_size", 8192) ) # PCIe ------------------------------------------------------------------------------------- if with_pcie: self.pcie_phy = USPPCIEPHY(platform, platform.request("pcie_x4"), speed = pcie_speed, data_width = {"gen3": 128, "gen4": 256}[pcie_speed], ip_name = "pcie4c_uscale_plus", bar0_size = 0x20000, ) self.add_pcie(phy=self.pcie_phy, ndmas=1) # Set manual locations to avoid Vivado to remap lanes to X0Y4, X0Y5, X0Y6, X0Y7. platform.toolchain.pre_placement_commands.append("reset_property LOC [get_cells -hierarchical -filter {{NAME=~*pcie_usp_i/*GTHE4_CHANNEL_PRIM_INST}}]") platform.toolchain.pre_placement_commands.append("set_property LOC GTHE4_CHANNEL_X0Y0 [get_cells -hierarchical -filter {{NAME=~*pcie_usp_i/*gthe4_channel_gen.gen_gthe4_channel_inst[0].GTHE4_CHANNEL_PRIM_INST}}]") platform.toolchain.pre_placement_commands.append("set_property LOC GTHE4_CHANNEL_X0Y1 [get_cells -hierarchical -filter {{NAME=~*pcie_usp_i/*gthe4_channel_gen.gen_gthe4_channel_inst[1].GTHE4_CHANNEL_PRIM_INST}}]") platform.toolchain.pre_placement_commands.append("set_property LOC GTHE4_CHANNEL_X0Y2 [get_cells -hierarchical -filter {{NAME=~*pcie_usp_i/*gthe4_channel_gen.gen_gthe4_channel_inst[2].GTHE4_CHANNEL_PRIM_INST}}]") platform.toolchain.pre_placement_commands.append("set_property LOC GTHE4_CHANNEL_X0Y3 [get_cells -hierarchical -filter {{NAME=~*pcie_usp_i/*gthe4_channel_gen.gen_gthe4_channel_inst[3].GTHE4_CHANNEL_PRIM_INST}}]") # Ethernet / Etherbone --------------------------------------------------------------------- if with_ethernet or with_etherbone: self.ethphy = LiteEthPHYRGMII( clock_pads = self.platform.request("eth_clocks"), pads = self.platform.request("eth"), tx_delay = 1e-9, rx_delay = 1e-9, usp = True ) if with_ethernet: self.add_ethernet(phy=self.ethphy, remote_ip=remote_ip) if with_etherbone: self.add_etherbone(phy=self.ethphy, ip_address=eth_ip) # SD Card ---------------------------------------------------------------------------------- if with_sdcard: self.add_sdcard() # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.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=alinx_axau15.Platform, description="LiteX SoC on AXAU15.") parser.add_target_argument("--sys-clk-freq", default=125e6, type=float, help="System clock frequency.") ethopts = parser.target_group.add_mutually_exclusive_group() ethopts.add_argument("--with-ethernet", action="store_true", help="Enable Ethernet support.") ethopts.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support.") parser.add_target_argument("--eth-ip", default="192.168.1.50", help="Ethernet/Etherbone IP address.") parser.add_target_argument("--remote-ip", default="192.168.1.100", help="Remote IP address of TFTP server.") parser.add_target_argument("--eth-dynamic-ip", action="store_true", help="Enable dynamic Ethernet IP addresses setting.") parser.add_target_argument("--with-pcie", action="store_true", help="Enable PCIe support.") parser.add_target_argument("--pcie-speed", default="gen3", help="PCIe speed.", choices=["gen3", "gen4"]) parser.add_target_argument("--driver", action="store_true", help="Generate PCIe driver.") parser.add_target_argument("--with-sdcard", action="store_true", help="Add SDCard.") args = parser.parse_args() assert not (args.with_etherbone and args.eth_dynamic_ip) soc = BaseSoC( sys_clk_freq = args.sys_clk_freq, with_ethernet = args.with_ethernet, with_etherbone = args.with_etherbone, eth_ip = args.eth_ip, remote_ip = args.remote_ip, eth_dynamic_ip = args.eth_dynamic_ip, with_pcie = args.with_pcie, pcie_speed = args.pcie_speed, with_sdcard = args.with_sdcard, **parser.soc_argdict ) builder = Builder(soc, **parser.builder_argdict) if args.build: builder.build(**parser.toolchain_argdict) if args.driver: generate_litepcie_software(soc, os.path.join(builder.output_dir, "driver")) if args.load: prog = soc.platform.create_programmer() prog.load_bitstream(builder.get_bitstream_filename(mode="sram")) if __name__ == "__main__": main()