litex-boards/litex_boards/targets/decklink_intensity_pro_4k.py

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#!/usr/bin/env python3
#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2021 Florent Kermarrec <florent@enjoy-digital.fr>
# SPDX-License-Identifier: BSD-2-Clause
2021-06-30 03:06:00 -04:00
# Work-In-Progress...
import os
from migen import *
from litex.gen import LiteXModule
from litex_boards.platforms import decklink_intensity_pro_4k
from litex.soc.cores.clock import *
from litex.soc.integration.soc import SoCRegion
from litex.soc.integration.soc_core import *
from litex.soc.integration.builder import *
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.cd_sys = ClockDomain()
# # #
self.pll = pll = S7PLL(speedgrade=-1)
self.comb += pll.reset.eq(ResetSignal("pcie"))
pll.register_clkin(ClockSignal("pcie"), 125e6)
pll.create_clkout(self.cd_sys, sys_clk_freq)
platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst.
# BaseSoC ------------------------------------------------------------------------------------------
class BaseSoC(SoCCore):
def __init__(self, sys_clk_freq=125e6, with_pcie=False, **kwargs):
platform = decklink_intensity_pro_4k.Platform()
# CRG --------------------------------------------------------------------------------------
self.crg = _CRG(platform, sys_clk_freq)
# SoCCore ----------------------------------------------------------------------------------
kwargs["uart_name"] = "crossover"
SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Blackmagic Decklink Intensity Pro 4K", **kwargs)
# 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)
# Build --------------------------------------------------------------------------------------------
def main():
from litex.build.parser import LiteXArgumentParser
parser = LiteXArgumentParser(platform=decklink_intensity_pro_4k.Platform, description="LiteX SoC Blackmagic Decklink Intensity Pro 4K.")
parser.add_target_argument("--sys-clk-freq", default=125e6, type=float, help="System clock frequency.")
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 = args.sys_clk_freq,
with_pcie = args.with_pcie | True, # FIXME: Always enable PCIe for now.
**parser.soc_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()