#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2019 Vamsi K Vytla # Copyright (c) 2019-2020 Florent Kermarrec # SPDX-License-Identifier: BSD-2-Clause import os from migen import * from litex.gen import LiteXModule from litex_boards.platforms import xilinx_ac701 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.common import PHYPadsReducer from litedram.modules import MT8JTF12864 from litedram.phy import s7ddrphy from liteeth.phy.a7_gtp import QPLLSettings, QPLL from liteeth.phy.a7_1000basex import A7_1000BASEX from liteeth.phy.s7rgmii import LiteEthPHYRGMII from litepcie.phy.s7pciephy import S7PCIEPHY 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_sys4x_dqs = ClockDomain() self.cd_idelay = ClockDomain() # # # self.pll = pll = S7PLL(speedgrade=-1) self.comb += pll.reset.eq(platform.request("cpu_reset") | self.rst) pll.register_clkin(platform.request("clk200"), 200e6) 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) platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst. self.idelayctrl = S7IDELAYCTRL(self.cd_idelay) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, sys_clk_freq=int(100e6), with_ethernet=False, eth_phy="rgmii", with_spi_flash=False, with_led_chaser=True, with_pcie=False, **kwargs): platform = xilinx_ac701.Platform() # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on AC701", **kwargs) # DDR3 SDRAM ------------------------------------------------------------------------------- if not self.integrated_main_ram_size: self.ddrphy = s7ddrphy.A7DDRPHY( pads = PHYPadsReducer(platform.request("ddram"), [0, 1, 2, 3]), memtype = "DDR3", nphases = 4, sys_clk_freq = sys_clk_freq) self.add_sdram("sdram", phy = self.ddrphy, module = MT8JTF12864(sys_clk_freq, "1:4"), l2_cache_size = kwargs.get("l2_size", 8192) ) # Ethernet --------------------------------------------------------------------------------- if with_ethernet: # RGMII Ethernet PHY ------------------------------------------------------------------- if eth_phy == "rgmii": # phy self.ethphy = LiteEthPHYRGMII( clock_pads = self.platform.request("eth_clocks"), pads = self.platform.request("eth")) # 1000BaseX Ethernet PHY --------------------------------------------------------------- if eth_phy == "1000basex": # phy self.comb += self.platform.request("sfp_mgt_clk_sel0", 0).eq(0) self.comb += self.platform.request("sfp_mgt_clk_sel1", 0).eq(0) self.comb += self.platform.request("sfp_tx_disable_n", 0).eq(0) qpll_settings = QPLLSettings( refclksel = 0b001, fbdiv = 4, fbdiv_45 = 5, refclk_div = 1) refclk125 = self.platform.request("gtp_refclk") refclk125_se = Signal() self.specials += \ Instance("IBUFDS_GTE2", i_CEB = 0, i_I = refclk125.p, i_IB = refclk125.n, o_O = refclk125_se) qpll = QPLL(refclk125_se, qpll_settings) self.submodules += qpll self.ethphy = A7_1000BASEX( qpll_channel = qpll.channels[0], data_pads = self.platform.request("sfp", 0), sys_clk_freq = self.clk_freq) self.add_ethernet(phy=self.ethphy) # SPI Flash -------------------------------------------------------------------------------- if with_spi_flash: from litespi.modules import N25Q256A from litespi.opcodes import SpiNorFlashOpCodes as Codes self.add_spi_flash(mode="4x", module=N25Q256A(Codes.READ_1_1_4), rate="1:1", with_master=True) # PCIe ------------------------------------------------------------------------------------- if with_pcie: self.pcie_phy = S7PCIEPHY(platform, platform.request("pcie_x4"), data_width = 128, bar0_size = 0x20000) self.add_pcie(phy=self.pcie_phy, ndmas=1) # 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=xilinx_ac701.Platform, description="LiteX SoC on AC701") parser.add_target_argument("--sys-clk-freq", default=100e6, help="System clock frequency.") parser.add_target_argument("--with-ethernet", action="store_true", help="Enable Ethernet support.") parser.add_target_argument("--eth-phy", default="rgmii", help="Select Ethernet PHY (rgmii or 1000basex).") parser.add_target_argument("--with-spi-flash", action="store_true", help="Enable SPI Flash (MMAPed).") parser.add_target_argument("--with-pcie", action="store_true", help="Enable PCIe support.") parser.add_target_argument("--driver", action="store_true", help="Generate PCIe driver.") args = parser.parse_args() soc = BaseSoC( sys_clk_freq = int(float(args.sys_clk_freq)), with_ethernet = args.with_ethernet, eth_phy = args.eth_phy, with_spi_flash = args.with_spi_flash, with_pcie = args.with_pcie, **parser.soc_core_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()