litex-boards/litex_boards/targets/ac701.py

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2019-06-10 11:09:51 -04:00
#!/usr/bin/env python3
# This file is Copyright (c) 2019 Vamsi K Vytla <vamsi.vytla@gmail.com>
# This file is Copyright (c) 2019 Florent Kermarrec <florent@enjoy-digital.fr>
# License: BSD
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import argparse
from migen import *
from litex_boards.platforms import ac701
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from litex.soc.cores.clock import *
from litex.soc.integration.soc_core import *
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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.a7_gtp import QPLLSettings, QPLL
from liteeth.phy.a7_1000basex import A7_1000BASEX
from liteeth.phy.s7rgmii import LiteEthPHYRGMII
# 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)
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self.clock_domains.cd_sys4x_dqs = ClockDomain(reset_less=True)
self.clock_domains.cd_clk200 = ClockDomain()
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# # #
self.submodules.pll = pll = S7PLL(speedgrade=-1)
self.comb += pll.reset.eq(platform.request("cpu_reset"))
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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)
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pll.create_clkout(self.cd_sys4x_dqs, 4*sys_clk_freq, phase=90)
pll.create_clkout(self.cd_clk200, 200e6)
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self.submodules.idelayctrl = S7IDELAYCTRL(self.cd_clk200)
# BaseSoC ------------------------------------------------------------------------------------------
class BaseSoC(SoCCore):
def __init__(self, sys_clk_freq=int(100e6), with_ethernet=False, ethernet_phy="rgmii", **kwargs):
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platform = ac701.Platform()
# SoCCore ----------------------------------------------------------------------------------
SoCCore.__init__(self, platform, clk_freq=sys_clk_freq, **kwargs)
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# CRG --------------------------------------------------------------------------------------
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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)
self.add_csr("ddrphy")
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
)
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# Ethernet ---------------------------------------------------------------------------------
if with_ethernet:
# RGMII Ethernet PHY -------------------------------------------------------------------
if ethernet_phy == "rgmii":
# phy
self.submodules.ethphy = LiteEthPHYRGMII(
clock_pads = self.platform.request("eth_clocks"),
pads = self.platform.request("eth"))
self.add_csr("ethphy")
# 1000BaseX Ethernet PHY ---------------------------------------------------------------
if ethernet_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)
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# Build --------------------------------------------------------------------------------------------
def main():
parser = argparse.ArgumentParser(description="LiteX SoC on AC701")
builder_args(parser)
soc_sdram_args(parser)
parser.add_argument("--with-ethernet", action="store_true",
help="enable Ethernet support")
parser.add_argument("--ethernet-phy", default="rgmii",
help="select Ethernet PHY (rgmii or 1000basex)")
args = parser.parse_args()
soc = BaseSoC(with_ethernet=args.with_ethernet,
ethernet_phy=args.ethernet_phy,
**soc_sdram_argdict(args))
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builder = Builder(soc, **builder_argdict(args))
builder.build()
if __name__ == "__main__":
main()