163 lines
6.8 KiB
Python
Executable File
163 lines
6.8 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) 2015-2019 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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import argparse
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from migen import *
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from litex_boards.platforms import nexys_video
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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.soc_sdram 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 MT41K256M16
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from litedram.phy import s7ddrphy
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from liteeth.phy.s7rgmii import LiteEthPHYRGMII
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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(reset_less=True)
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self.clock_domains.cd_sys4x_dqs = ClockDomain(reset_less=True)
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self.clock_domains.cd_idelay = ClockDomain()
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self.clock_domains.cd_clk100 = ClockDomain()
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# # #
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self.submodules.pll = pll = S7MMCM(speedgrade=-1)
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self.comb += pll.reset.eq(~platform.request("cpu_reset") | self.rst)
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pll.register_clkin(platform.request("clk100"), 100e6)
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pll.create_clkout(self.cd_sys, sys_clk_freq)
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pll.create_clkout(self.cd_sys4x, 4*sys_clk_freq)
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pll.create_clkout(self.cd_sys4x_dqs, 4*sys_clk_freq, phase=90)
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pll.create_clkout(self.cd_idelay, 200e6)
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pll.create_clkout(self.cd_clk100, 100e6)
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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.submodules.idelayctrl = S7IDELAYCTRL(self.cd_idelay)
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# BaseSoC ------------------------------------------------------------------------------------------
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class BaseSoC(SoCCore):
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def __init__(self, sys_clk_freq=int(100e6), with_ethernet=False, with_sata=False, **kwargs):
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platform = nexys_video.Platform()
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# SoCCore ----------------------------------------------------------------------------------
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SoCCore.__init__(self, platform, sys_clk_freq,
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ident = "LiteX SoC on Nexys Video",
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ident_version = True,
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**kwargs)
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# CRG --------------------------------------------------------------------------------------
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self.submodules.crg = _CRG(platform, sys_clk_freq)
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# DDR3 SDRAM -------------------------------------------------------------------------------
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if not self.integrated_main_ram_size:
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self.submodules.ddrphy = s7ddrphy.A7DDRPHY(platform.request("ddram"),
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memtype = "DDR3",
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nphases = 4,
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sys_clk_freq = sys_clk_freq)
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self.add_csr("ddrphy")
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self.add_sdram("sdram",
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phy = self.ddrphy,
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module = MT41K256M16(sys_clk_freq, "1:4"),
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origin = self.mem_map["main_ram"],
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size = kwargs.get("max_sdram_size", 0x40000000),
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l2_cache_size = kwargs.get("l2_size", 8192),
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l2_cache_min_data_width = kwargs.get("min_l2_data_width", 128),
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l2_cache_reverse = True
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)
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# Ethernet ---------------------------------------------------------------------------------
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if with_ethernet:
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self.submodules.ethphy = LiteEthPHYRGMII(
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clock_pads = self.platform.request("eth_clocks"),
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pads = self.platform.request("eth"))
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self.add_csr("ethphy")
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self.add_ethernet(phy=self.ethphy)
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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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# AB09-FMCRAID / https://www.dgway.com/AB09-FMCRAID_E.html
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("fmc2sata", 0,
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Subsignal("clk_p", Pins("LPC:GBTCLK0_M2C_P")),
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Subsignal("clk_n", Pins("LPC:GBTCLK0_M2C_N")),
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Subsignal("tx_p", Pins("LPC:DP0_C2M_P")),
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Subsignal("tx_n", Pins("LPC:DP0_C2M_N")),
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Subsignal("rx_p", Pins("LPC:DP0_M2C_P")),
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Subsignal("rx_n", Pins("LPC:DP0_M2C_N"))
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),
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]
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platform.add_extension(_sata_io)
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# PHY
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self.submodules.sata_phy = LiteSATAPHY(platform.device,
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pads = platform.request("fmc2sata"),
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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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self.add_csr("sata_phy")
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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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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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self.add_csr("leds")
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# Build --------------------------------------------------------------------------------------------
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def main():
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parser = argparse.ArgumentParser(description="LiteX SoC on Nexys Video")
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parser.add_argument("--build", action="store_true", help="Build bitstream")
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parser.add_argument("--load", action="store_true", help="Load bitstream")
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parser.add_argument("--sys-clk-freq", default=100e6, help="System clock frequency (default: 100MHz)")
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parser.add_argument("--with-ethernet", action="store_true", help="Enable Ethernet support")
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parser.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support")
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parser.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support")
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parser.add_argument("--with-sata", action="store_true", help="Enable SATA support (over FMCRAID)")
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builder_args(parser)
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soc_sdram_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_sata = args.with_sata,
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**soc_sdram_argdict(args)
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)
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assert not (args.with_spi_sdcard and args.with_sdcard)
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if args.with_spi_sdcard:
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soc.add_spi_sdcard()
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if args.with_sdcard:
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soc.add_sdcard()
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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.load:
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prog = soc.platform.create_programmer()
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prog.load_bitstream(os.path.join(builder.gateware_dir, soc.build_name + ".bit"))
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if __name__ == "__main__":
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main()
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