litex-boards/litex_boards/targets/kc705.py

121 lines
4.5 KiB
Python
Executable File

#!/usr/bin/env python3
# This file is Copyright (c) 2014-2015 Sebastien Bourdeauducq <sb@m-labs.hk>
# This file is Copyright (c) 2014-2019 Florent Kermarrec <florent@enjoy-digital.fr>
# This file is Copyright (c) 2014-2015 Yann Sionneau <ys@m-labs.hk>
# License: BSD
import argparse
from migen import *
from litex_boards.platforms import kc705
from litex.soc.cores.clock import *
from litex.soc.integration.soc_sdram import *
from litex.soc.integration.builder import *
from litedram.modules import MT8JTF12864
from litedram.phy import s7ddrphy
from liteeth.phy import LiteEthPHY
from liteeth.mac import LiteEthMAC
# CRG ----------------------------------------------------------------------------------------------
class _CRG(Module):
def __init__(self, platform, sys_clk_freq):
self.clock_domains.cd_sys = ClockDomain()
self.clock_domains.cd_sys4x = ClockDomain(reset_less=True)
self.clock_domains.cd_clk200 = ClockDomain()
# # #
self.submodules.pll = pll = S7MMCM(speedgrade=-2)
self.comb += pll.reset.eq(platform.request("cpu_reset"))
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_clk200, 200e6)
self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_clk200)
# BaseSoC ------------------------------------------------------------------------------------------
class BaseSoC(SoCSDRAM):
def __init__(self, sys_clk_freq=int(125e6), **kwargs):
platform = kc705.Platform()
# SoCSDRAM ---------------------------------------------------------------------------------
SoCSDRAM.__init__(self, platform, clk_freq=sys_clk_freq, **kwargs)
# CRG --------------------------------------------------------------------------------------
self.submodules.crg = _CRG(platform, sys_clk_freq)
# DDR3 SDRAM -------------------------------------------------------------------------------
if not self.integrated_main_ram_size:
self.submodules.ddrphy = s7ddrphy.K7DDRPHY(platform.request("ddram"),
memtype = "DDR3",
nphases = 4,
sys_clk_freq = sys_clk_freq)
self.add_csr("ddrphy")
sdram_module = MT8JTF12864(sys_clk_freq, "1:4")
self.register_sdram(self.ddrphy,
geom_settings = sdram_module.geom_settings,
timing_settings = sdram_module.timing_settings)
# EthernetSoC --------------------------------------------------------------------------------------
class EthernetSoC(BaseSoC):
mem_map = {
"ethmac": 0xb0000000,
}
mem_map.update(BaseSoC.mem_map)
def __init__(self, **kwargs):
BaseSoC.__init__(self, **kwargs)
# Ethernet ---------------------------------------------------------------------------------
# phy
self.submodules.ethphy = LiteEthPHY(
clock_pads = self.platform.request("eth_clocks"),
pads = self.platform.request("eth"),
clk_freq = self.clk_freq)
self.add_csr("ethphy")
# mac
self.submodules.ethmac = LiteEthMAC(
phy = self.ethphy,
dw = 32,
interface = "wishbone",
endianness = self.cpu.endianness)
self.add_memory_region("ethmac", self.mem_map["ethmac"], 0x2000, type="io")
self.add_wb_slave(self.mem_map["ethmac"], self.ethmac.bus, 0x2000)
self.add_csr("ethmac")
self.add_interrupt("ethmac")
# timing constraints
self.platform.add_period_constraint(self.ethphy.crg.cd_eth_rx.clk, 1e9/125e6)
self.platform.add_period_constraint(self.ethphy.crg.cd_eth_tx.clk, 1e9/125e6)
self.platform.add_false_path_constraints(
self.crg.cd_sys.clk,
self.ethphy.crg.cd_eth_rx.clk,
self.ethphy.crg.cd_eth_tx.clk)
# Build --------------------------------------------------------------------------------------------
def main():
parser = argparse.ArgumentParser(description="LiteX SoC on KC705")
builder_args(parser)
soc_sdram_args(parser)
parser.add_argument("--with-ethernet", action="store_true",
help="enable Ethernet support")
args = parser.parse_args()
cls = EthernetSoC if args.with_ethernet else BaseSoC
soc = cls(**soc_sdram_argdict(args))
builder = Builder(soc, **builder_argdict(args))
builder.build()
if __name__ == "__main__":
main()