litex-boards/litex_boards/targets/xilinx_ac701.py

170 lines
7.4 KiB
Python
Executable File

#!/usr/bin/env python3
#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2019 Vamsi K Vytla <vamsi.vytla@gmail.com>
# Copyright (c) 2019-2020 Florent Kermarrec <florent@enjoy-digital.fr>
# SPDX-License-Identifier: BSD-2-Clause
import os
import argparse
from migen import *
from litex_boards.platforms import 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(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.submodules.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.submodules.idelayctrl = S7IDELAYCTRL(self.cd_idelay)
# BaseSoC ------------------------------------------------------------------------------------------
class BaseSoC(SoCCore):
def __init__(self, sys_clk_freq=int(100e6), with_ethernet=False, eth_phy="rgmii", with_pcie=False, **kwargs):
platform = ac701.Platform()
# SoCCore ----------------------------------------------------------------------------------
SoCCore.__init__(self, platform, sys_clk_freq,
ident = "LiteX SoC on AC701",
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(
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"),
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:
# RGMII Ethernet PHY -------------------------------------------------------------------
if eth_phy == "rgmii":
# phy
self.submodules.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.submodules.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)
# PCIe -------------------------------------------------------------------------------------
if with_pcie:
self.submodules.pcie_phy = S7PCIEPHY(platform, platform.request("pcie_x4"),
data_width = 128,
bar0_size = 0x20000)
self.add_pcie(phy=self.pcie_phy, ndmas=1)
# Leds -------------------------------------------------------------------------------------
self.submodules.leds = LedChaser(
pads = platform.request_all("user_led"),
sys_clk_freq = sys_clk_freq)
# Build --------------------------------------------------------------------------------------------
def main():
parser = argparse.ArgumentParser(description="LiteX SoC on AC701")
builder_args(parser)
soc_core_args(parser)
parser.add_argument("--build", action="store_true", help="Build bitstream")
parser.add_argument("--load", action="store_true", help="Load bitstream")
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("--eth-phy", default="rgmii", help="Select Ethernet PHY: rgmii (default) or 1000basex")
parser.add_argument("--with-pcie", action="store_true", help="Enable PCIe support")
parser.add_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_pcie = args.with_pcie,
**soc_core_argdict(args)
)
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()