#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2022 Andrew Gillham # Copyright (c) 2014-2015 Sebastien Bourdeauducq # Copyright (c) 2014-2020 Florent Kermarrec # Copyright (c) 2014-2015 Yann Sionneau # Copyright (c) 2020 Hans Baier # SPDX-License-Identifier: BSD-2-Clause # Board support for this chinese Kintex 420T board by "HPC FPGA Board Store" # https://www.aliexpress.com/item/1005001631827738.html import os from migen import * from litex.gen import LiteXModule from litex_boards.platforms import hpcstore_xc7k420t 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 litex.soc.cores.bitbang import I2CMaster from litedram.phy import s7ddrphy from litedram.common import PHYPadsReducer from litedram.modules import K4B1G0446F 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() # # # # Clk/Rst. clk100 = platform.request("clk100") rst_n = platform.request("cpu_reset_n") # PLL. self.pll = pll = S7PLL(speedgrade=-2) self.comb += pll.reset.eq(~rst_n | self.rst) pll.register_clkin(clk100, 100e6) 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=120) 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), io_voltage="3.3V", with_led_chaser = True, with_pcie = False, with_sata = False, **kwargs): platform = hpcstore_xc7k420t.Platform(io_voltage) # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on HPC Store XC7K420T", **kwargs) # DDR3 SDRAM ------------------------------------------------------------------------------- if not self.integrated_main_ram_size: # we need to use A7DDRPHY instead of K7DDRPHY, because the 420T has no ODELAYE2 self.ddrphy = s7ddrphy.A7DDRPHY( pads = PHYPadsReducer(platform.request("ddram", 0), [0, 1, 2, 3]), #pads = platform.request("ddram", 0), memtype = "DDR3", nphases = 4, sys_clk_freq = sys_clk_freq, iodelay_clk_freq = 200e6 ) self.add_sdram("sdram", phy = self.ddrphy, module = K4B1G0446F(sys_clk_freq, "1:4", "800"), l2_cache_size = kwargs.get("l2_size", 8192), ) # 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) # TODO verify / test # SATA ------------------------------------------------------------------------------------- if with_sata: from litex.build.generic_platform import Subsignal, Pins from litesata.phy import LiteSATAPHY # RefClk, Generate 150MHz from PLL. self.cd_sata_refclk = ClockDomain() self.crg.pll.create_clkout(self.cd_sata_refclk, 150e6) sata_refclk = ClockSignal("sata_refclk") platform.add_platform_command("set_property SEVERITY {{Warning}} [get_drc_checks REQP-52]") # PHY self.sata_phy = LiteSATAPHY(platform.device, refclk = sata_refclk, pads = platform.request("sata", 0), gen = "gen2", clk_freq = sys_clk_freq, data_width = 16) # Core self.add_sata(phy=self.sata_phy, mode="read+write") # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.leds = LedChaser( pads = platform.request_all("user_led_n"), sys_clk_freq = sys_clk_freq) # I2C -------------------------------------------------------------------------------------- self.i2c = I2CMaster(platform.request("i2c")) # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=hpcstore_xc7k420t.Platform, description="LiteX SoC on AliExpress HPC Store XC7K420T") parser.add_target_argument("--sys-clk-freq", default=100e6, help="System clock frequency.") parser.add_target_argument("--io-voltage", default="3.3V", help="IO voltage chosen by Jumper J3. Can be: '3.3V' or '2.5V'") 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.") parser.add_target_argument("--with-sata", action="store_true", help="Enable SATA support.") args = parser.parse_args() soc = BaseSoC( sys_clk_freq = int(float(args.sys_clk_freq)), io_voltage = args.io_voltage, with_pcie = args.with_pcie, with_sata = args.with_sata, **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()