litex-boards/litex_boards/targets/netv2.py

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#!/usr/bin/env python3
#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2018-2019 Florent Kermarrec <florent@enjoy-digital.fr>
# SPDX-License-Identifier: BSD-2-Clause
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import os
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import argparse
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import sys
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from migen import *
from litex_boards.platforms import netv2
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from litex.soc.interconnect.csr import *
from litex.soc.integration.soc_core import *
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from litex.soc.integration.soc_sdram import *
from litex.soc.integration.builder import *
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from litex.soc.cores.clock import *
from litex.soc.cores.led import LedChaser
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from litedram.modules import K4B2G1646F
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from litedram.phy import s7ddrphy
from liteeth.phy.rmii import LiteEthPHYRMII
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from litepcie.phy.s7pciephy import S7PCIEPHY
from litepcie.software import generate_litepcie_software
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# CRG ----------------------------------------------------------------------------------------------
class _CRG(Module):
def __init__(self, platform, sys_clk_freq):
self.rst = Signal()
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self.clock_domains.cd_sys = ClockDomain()
self.clock_domains.cd_sys4x = ClockDomain(reset_less=True)
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self.clock_domains.cd_sys4x_dqs = ClockDomain(reset_less=True)
self.clock_domains.cd_idelay = ClockDomain()
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self.clock_domains.cd_clk100 = ClockDomain()
self.clock_domains.cd_eth = ClockDomain()
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# Clk/Rst
clk50 = platform.request("clk50")
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# PLL
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self.submodules.pll = pll = S7PLL(speedgrade=-1)
self.comb += pll.reset.eq(self.rst)
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pll.register_clkin(clk50, 50e6)
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pll.create_clkout(self.cd_sys, sys_clk_freq)
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)
pll.create_clkout(self.cd_idelay, 200e6)
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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.
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self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_idelay)
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# 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)
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# CRG --------------------------------------------------------------------------------------
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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
)
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# 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)
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# 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)
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# Leds -------------------------------------------------------------------------------------
self.submodules.leds = LedChaser(
pads = platform.request_all("user_led"),
sys_clk_freq = sys_clk_freq)
self.add_csr("leds")
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# Build --------------------------------------------------------------------------------------------
def main():
parser = argparse.ArgumentParser(description="LiteX SoC on NeTV2")
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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)")
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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")
sdopts = parser.add_mutually_exclusive_group()
sdopts.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support")
sdopts.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support")
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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)
)
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if args.with_spi_sdcard:
soc.add_spi_sdcard()
if args.with_sdcard:
soc.add_sdcard()
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builder = Builder(soc, **builder_argdict(args))
builder.build(run=args.build)
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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"))
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if __name__ == "__main__":
main()