litex-boards/litex_boards/targets/hpcstore_xc7k420t.py

170 lines
6.9 KiB
Python
Executable File

#!/usr/bin/env python3
#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2022 Andrew Gillham <gillham@roadsign.com>
# Copyright (c) 2014-2015 Sebastien Bourdeauducq <sb@m-labs.hk>
# Copyright (c) 2014-2020 Florent Kermarrec <florent@enjoy-digital.fr>
# Copyright (c) 2014-2015 Yann Sionneau <ys@m-labs.hk>
# Copyright (c) 2020 Hans Baier <hansfbaier@gmail.com>
# 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=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, type=float, 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 = args.sys_clk_freq,
io_voltage = args.io_voltage,
with_pcie = args.with_pcie,
with_sata = args.with_sata,
**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()