198 lines
7.7 KiB
Python
Executable File
198 lines
7.7 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
|
|
#
|
|
# This file is part of LiteX-Boards.
|
|
#
|
|
# Copyright (c) 2020 Florent Kermarrec <florent@enjoy-digital.fr>
|
|
# SPDX-License-Identifier: BSD-2-Clause
|
|
|
|
# Build/Use ----------------------------------------------------------------------------------------
|
|
# Build/Load bitstream:
|
|
# ./acorn_cle_215.py --uart-name=crossover --with-pcie --build --driver --load (or --flash)
|
|
#
|
|
#.Build the kernel and load it:
|
|
# cd build/<platform>/driver/kernel
|
|
# make
|
|
# sudo ./init.sh
|
|
#
|
|
# Test userspace utilities:
|
|
# cd build/<platform>/driver/user
|
|
# make
|
|
# ./litepcie_util info
|
|
# ./litepcie_util scratch_test
|
|
# ./litepcie_util dma_test
|
|
# ./litepcie_util uart_test
|
|
|
|
import os
|
|
import argparse
|
|
import sys
|
|
|
|
from migen import *
|
|
|
|
from litex_boards.platforms import acorn_cle_215
|
|
|
|
from litex.soc.interconnect.csr import *
|
|
from litex.soc.integration.soc_core import *
|
|
from litex.soc.integration.soc_sdram import *
|
|
from litex.soc.integration.builder import *
|
|
|
|
from litex.soc.cores.clock import *
|
|
from litex.soc.cores.led import LedChaser
|
|
|
|
from litedram.modules import MT41K512M16
|
|
from litedram.phy import s7ddrphy
|
|
|
|
from litepcie.phy.s7pciephy import S7PCIEPHY
|
|
from litepcie.core import LitePCIeEndpoint, LitePCIeMSI
|
|
from litepcie.frontend.dma import LitePCIeDMA
|
|
from litepcie.frontend.wishbone import LitePCIeWishboneBridge
|
|
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()
|
|
|
|
# Clk/Rst
|
|
clk200 = platform.request("clk200")
|
|
|
|
# PLL
|
|
self.submodules.pll = pll = S7PLL()
|
|
self.comb += pll.reset.eq(self.rst)
|
|
pll.register_clkin(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)
|
|
|
|
self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_idelay)
|
|
|
|
# BaseSoC -----------------------------------------------------------------------------------------
|
|
|
|
class BaseSoC(SoCCore):
|
|
def __init__(self, with_pcie=False, **kwargs):
|
|
platform = acorn_cle_215.Platform()
|
|
sys_clk_freq = int(100e6)
|
|
|
|
# SoCCore ----------------------------------------------------------------------------------
|
|
SoCCore.__init__(self, platform, sys_clk_freq,
|
|
ident = "LiteX SoC on Acorn CLE 215+",
|
|
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(platform.request("ddram"),
|
|
memtype = "DDR3",
|
|
nphases = 4,
|
|
sys_clk_freq = sys_clk_freq,
|
|
iodelay_clk_freq = 200e6)
|
|
self.add_csr("ddrphy")
|
|
self.add_sdram("sdram",
|
|
phy = self.ddrphy,
|
|
module = MT41K512M16(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
|
|
)
|
|
|
|
# PCIe -------------------------------------------------------------------------------------
|
|
if with_pcie:
|
|
assert self.csr_data_width == 32
|
|
# PHY
|
|
self.submodules.pcie_phy = S7PCIEPHY(platform, platform.request("pcie_x4"),
|
|
data_width = 128,
|
|
bar0_size = 0x20000)
|
|
platform.add_false_path_constraints(self.crg.cd_sys.clk, self.pcie_phy.cd_pcie.clk)
|
|
self.add_csr("pcie_phy")
|
|
self.comb += platform.request("pcie_clkreq_n").eq(0)
|
|
|
|
# Endpoint
|
|
self.submodules.pcie_endpoint = LitePCIeEndpoint(self.pcie_phy, max_pending_requests=8)
|
|
|
|
# Wishbone bridge
|
|
self.submodules.pcie_bridge = LitePCIeWishboneBridge(self.pcie_endpoint,
|
|
base_address = self.mem_map["csr"])
|
|
self.add_wb_master(self.pcie_bridge.wishbone)
|
|
|
|
# DMA0
|
|
self.submodules.pcie_dma0 = LitePCIeDMA(self.pcie_phy, self.pcie_endpoint,
|
|
with_buffering = True, buffering_depth=1024,
|
|
with_loopback = True)
|
|
self.add_csr("pcie_dma0")
|
|
|
|
# DMA1
|
|
self.submodules.pcie_dma1 = LitePCIeDMA(self.pcie_phy, self.pcie_endpoint,
|
|
with_buffering = True, buffering_depth=1024,
|
|
with_loopback = True)
|
|
self.add_csr("pcie_dma1")
|
|
|
|
self.add_constant("DMA_CHANNELS", 2)
|
|
|
|
# MSI
|
|
self.submodules.pcie_msi = LitePCIeMSI()
|
|
self.add_csr("pcie_msi")
|
|
self.comb += self.pcie_msi.source.connect(self.pcie_phy.msi)
|
|
self.interrupts = {
|
|
"PCIE_DMA0_WRITER": self.pcie_dma0.writer.irq,
|
|
"PCIE_DMA0_READER": self.pcie_dma0.reader.irq,
|
|
"PCIE_DMA1_WRITER": self.pcie_dma1.writer.irq,
|
|
"PCIE_DMA1_READER": self.pcie_dma1.reader.irq,
|
|
}
|
|
for i, (k, v) in enumerate(sorted(self.interrupts.items())):
|
|
self.comb += self.pcie_msi.irqs[i].eq(v)
|
|
self.add_constant(k + "_INTERRUPT", i)
|
|
|
|
# Leds -------------------------------------------------------------------------------------
|
|
self.submodules.leds = LedChaser(
|
|
pads = platform.request_all("user_led"),
|
|
sys_clk_freq = sys_clk_freq)
|
|
self.add_csr("leds")
|
|
|
|
# Build --------------------------------------------------------------------------------------------
|
|
|
|
def main():
|
|
parser = argparse.ArgumentParser(description="LiteX SoC on Acorn CLE 215+")
|
|
parser.add_argument("--build", action="store_true", help="Build bitstream")
|
|
parser.add_argument("--with-pcie", action="store_true", help="Enable PCIe support")
|
|
parser.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support (requires SDCard adapter on P2)")
|
|
parser.add_argument("--driver", action="store_true", help="Generate PCIe driver")
|
|
parser.add_argument("--load", action="store_true", help="Load bitstream")
|
|
parser.add_argument("--flash", action="store_true", help="Flash bitstream")
|
|
builder_args(parser)
|
|
soc_sdram_args(parser)
|
|
args = parser.parse_args()
|
|
|
|
soc = BaseSoC(with_pcie=args.with_pcie, **soc_sdram_argdict(args))
|
|
|
|
if args.with_spi_sdcard:
|
|
soc.add_spi_sdcard()
|
|
|
|
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 args.flash:
|
|
prog = soc.platform.create_programmer()
|
|
prog.load_bitstream(os.path.join(builder.gateware_dir, soc.build_name + ".bin"))
|
|
|
|
if __name__ == "__main__":
|
|
main()
|