#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2018-2019 Florent Kermarrec # SPDX-License-Identifier: BSD-2-Clause import os import argparse import sys from migen import * from litex_boards.platforms import netv2 from litex.soc.interconnect.csr import * from litex.soc.integration.soc_core import * from litex.soc.integration.soc_sdram import * from litex.soc.integration.builder import * from litex.soc.cores.clock import * from litex.soc.cores.led import LedChaser from litedram.modules import K4B2G1646F from litedram.phy import s7ddrphy from liteeth.phy.rmii import LiteEthPHYRMII from litepcie.phy.s7pciephy import S7PCIEPHY from litepcie.software import generate_litepcie_software # CRG ---------------------------------------------------------------------------------------------- class _CRG(Module): def __init__(self, platform, sys_clk_freq): self.rst = Signal() self.clock_domains.cd_sys = ClockDomain() self.clock_domains.cd_sys4x = ClockDomain(reset_less=True) self.clock_domains.cd_sys4x_dqs = ClockDomain(reset_less=True) self.clock_domains.cd_idelay = ClockDomain() self.clock_domains.cd_clk100 = ClockDomain() self.clock_domains.cd_eth = ClockDomain() # Clk/Rst clk50 = platform.request("clk50") # PLL self.submodules.pll = pll = S7PLL(speedgrade=-1) self.comb += pll.reset.eq(self.rst) pll.register_clkin(clk50, 50e6) pll.create_clkout(self.cd_sys, sys_clk_freq) pll.create_clkout(self.cd_sys4x, 4*sys_clk_freq) pll.create_clkout(self.cd_sys4x_dqs, 4*sys_clk_freq, phase=90) pll.create_clkout(self.cd_idelay, 200e6) pll.create_clkout(self.cd_clk100, 100e6) pll.create_clkout(self.cd_eth, 50e6) platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst. self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_idelay) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, variant="a7-35", sys_clk_freq=int(100e6), with_pcie=False, with_ethernet=False, **kwargs): platform = netv2.Platform(variant=variant) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident = "LiteX SoC on NeTV2", ident_version = True, **kwargs) # CRG -------------------------------------------------------------------------------------- self.submodules.crg = _CRG(platform, sys_clk_freq) # DDR3 SDRAM ------------------------------------------------------------------------------- if not self.integrated_main_ram_size: self.submodules.ddrphy = s7ddrphy.A7DDRPHY(platform.request("ddram"), memtype = "DDR3", nphases = 4, sys_clk_freq = sys_clk_freq) self.add_csr("ddrphy") self.add_sdram("sdram", phy = self.ddrphy, module = K4B2G1646F(sys_clk_freq, "1:4"), origin = self.mem_map["main_ram"], size = kwargs.get("max_sdram_size", 0x40000000), l2_cache_size = kwargs.get("l2_size", 8192), l2_cache_min_data_width = kwargs.get("min_l2_data_width", 128), l2_cache_reverse = True ) # Ethernet --------------------------------------------------------------------------------- if with_ethernet: self.submodules.ethphy = LiteEthPHYRMII( clock_pads = self.platform.request("eth_clocks"), pads = self.platform.request("eth")) self.add_csr("ethphy") self.add_ethernet(phy=self.ethphy) # PCIe ------------------------------------------------------------------------------------- if with_pcie: self.submodules.pcie_phy = S7PCIEPHY(platform, platform.request("pcie_x4"), data_width = 128, bar0_size = 0x20000) self.add_csr("pcie_phy") self.add_pcie(phy=self.pcie_phy, ndmas=1, max_pending_requests=2) # Leds ------------------------------------------------------------------------------------- self.submodules.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) self.add_csr("leds") # Build -------------------------------------------------------------------------------------------- def main(): parser = argparse.ArgumentParser(description="LiteX SoC on NeTV2") parser.add_argument("--build", action="store_true", help="Build bitstream") parser.add_argument("--load", action="store_true", help="Load bitstream") parser.add_argument("--variant", default="a7-35", help="Board variant: a7-35 (default) or a7-100") parser.add_argument("--sys-clk-freq", default=100e6, help="System clock frequency (default: 100MHz)") parser.add_argument("--with-ethernet", action="store_true", help="Enable Ethernet support") parser.add_argument("--with-pcie", action="store_true", help="Enable PCIe support") parser.add_argument("--driver", action="store_true", help="Generate PCIe driver") parser.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support") parser.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support") builder_args(parser) soc_sdram_args(parser) args = parser.parse_args() soc = BaseSoC( variant = args.variant, sys_clk_freq = int(float(args.sys_clk_freq)), with_ethernet = args.with_ethernet, with_pcie = args.with_pcie, **soc_sdram_argdict(args) ) assert not (args.with_spi_sdcard and args.with_sdcard) if args.with_spi_sdcard: soc.add_spi_sdcard() if args.with_sdcard: soc.add_sdcard() builder = Builder(soc, **builder_argdict(args)) builder.build(run=args.build) 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(os.path.join(builder.gateware_dir, soc.build_name + ".bit")) if __name__ == "__main__": main()