Unverified Commit f18b10d1 authored by enjoy-digital's avatar enjoy-digital Committed by GitHub
Browse files

Merge pull request #249 from Quiddle11/atlys

Initial Digilent Atlys support
parents 7778f1fc 921c300b
#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2015-2021 HDMI2USB/LiteX developers
# SPDX-License-Identifier: BSD-2-Clause
from litex.build.generic_platform import *
from litex.build.xilinx import XilinxPlatform
# IOs ----------------------------------------------------------------------------------------------
_io = [
# Clk/Rst
("clk100", 0, Pins("L15"), IOStandard("LVCMOS33")),
("cpu_reset", 0, Pins("T15"), IOStandard("LVCMOS33")),
# Serial
("serial", 0,
Subsignal("rx", Pins("A16"), IOStandard("LVCMOS33")),
Subsignal("tx", Pins("B16"), IOStandard("LVCMOS33")),
),
# FX2
("fx2", 0,
Subsignal("ifclk", Pins("C10")),
Subsignal("data", Pins("A2 D6 C6 B3 A3 B4 A4 C5")),
Subsignal("addr", Pins("A14 B14"), Misc("DRIVE=12")),
Subsignal("flaga", Pins("B9"), Misc("DRIVE=12")),
Subsignal("flagb", Pins("A9"), Misc("DRIVE=12")),
Subsignal("flagc", Pins("C15"), Misc("DRIVE=12")),
Subsignal("rd_n", Pins("F13"), Misc("DRIVE=12")),
Subsignal("wr_n", Pins("E13")),
Subsignal("oe_n", Pins("A15"), Misc("DRIVE=12")),
Subsignal("cs_n", Pins("B2")),
Subsignal("pktend_n", Pins("C4"), Misc("DRIVE=12")),
IOStandard("LVCMOS33")
),
# SPI Flash
("spiflash4x", 0,
Subsignal("cs_n", Pins("V3")),
Subsignal("clk", Pins("R15")),
Subsignal("dq", Pins("T13", "R13", "T14", "V14")),
IOStandard("LVCMOS33"),
Misc("SLEW=FAST"),
),
# Leds
("user_led", 0, Pins("U18"), IOStandard("LVCMOS33")),
("user_led", 1, Pins("M14"), IOStandard("LVCMOS33")),
("user_led", 2, Pins("N14"), IOStandard("LVCMOS33")),
("user_led", 3, Pins("L14"), IOStandard("LVCMOS33")),
("user_led", 4, Pins("M13"), IOStandard("LVCMOS33")),
("user_led", 5, Pins("D4"), IOStandard("LVCMOS33")),
("user_led", 6, Pins("P16"), IOStandard("LVCMOS33")),
("user_led", 7, Pins("N12"), IOStandard("LVCMOS33")),
# Buttons
("user_btn", 0, Pins("N4"), IOStandard("LVCMOS18")), # North button
("user_btn", 1, Pins("P4"), IOStandard("LVCMOS18")), # East button
("user_btn", 2, Pins("P3"), IOStandard("LVCMOS18")), # South button
("user_btn", 3, Pins("F6"), IOStandard("LVCMOS18")), # West button
("user_btn", 4, Pins("F5"), IOStandard("LVCMOS18")), # Center button
# Switches.
("user_sw", 0, Pins("A10"), IOStandard("LVCMOS33")),
("user_sw", 1, Pins("D14"), IOStandard("LVCMOS33")),
("user_sw", 2, Pins("C14"), IOStandard("LVCMOS33")),
("user_sw", 3, Pins("P15"), IOStandard("LVCMOS33")),
("user_sw", 4, Pins("P12"), IOStandard("LVCMOS33")),
("user_sw", 5, Pins("R5"), IOStandard("LVCMOS33")),
("user_sw", 6, Pins("T5"), IOStandard("LVCMOS33")),
("user_sw", 7, Pins("E4"), IOStandard("LVCMOS18")),
# GMII/MII Ethernet
("eth_clocks", 0,
Subsignal("tx", Pins("K16")),
Subsignal("gtx", Pins("L12")),
Subsignal("rx", Pins("K15")),
IOStandard("LVCMOS33")
),
("eth", 0,
Subsignal("rst_n", Pins("G13")),
Subsignal("int_n", Pins("L16")),
Subsignal("mdio", Pins("N17")),
Subsignal("mdc", Pins("F16")),
Subsignal("rx_dv", Pins("F17")),
Subsignal("rx_er", Pins("F18")),
Subsignal("rx_data", Pins("G16 H14 E16 F15 F14 E18 D18 D17")),
Subsignal("tx_en", Pins("H15")),
Subsignal("tx_er", Pins("G18")),
Subsignal("tx_data", Pins("H16 H13 K14 K13 J13 G14 H12 K12")),
Subsignal("col", Pins("C17")),
Subsignal("crs", Pins("C18")),
IOStandard("LVCMOS33")
),
# DDR2 SDRAM.
("ddram_clock", 0,
Subsignal("p", Pins("G3")),
Subsignal("n", Pins("G1")),
IOStandard("DIFF_SSTL18_II"), Misc("IN_TERM=NONE")
),
("ddram", 0,
Subsignal("cke", Pins("H7"), IOStandard("SSTL18_II")),
Subsignal("ras_n", Pins("L5"), IOStandard("SSTL18_II")),
Subsignal("cas_n", Pins("K5"), IOStandard("SSTL18_II")),
Subsignal("we_n", Pins("E3"), IOStandard("SSTL18_II")),
Subsignal("ba", Pins("F2 F1 E1"), IOStandard("SSTL18_II")),
Subsignal("a", Pins(
"J7 J6 H5 L7 F3 H4 H3 H6",
"D2 D1 F4 D3 G6"),
IOStandard("SSTL18_II")),
Subsignal("dq", Pins(
"L2 L1 K2 K1 H2 H1 J3 J1",
"M3 M1 N2 N1 T2 T1 U2 U1"),
IOStandard("SSTL18_II")),
Subsignal("dqs", Pins("P2 L4"), IOStandard("DIFF_SSTL18_II")),
Subsignal("dqs_n", Pins("P1 L3"), IOStandard("DIFF_SSTL18_II")),
Subsignal("dm", Pins("K4 K3"), IOStandard("SSTL18_II")),
Subsignal("odt", Pins("K6"), IOStandard("SSTL18_II"))
),
# HDMI Out 0
("hdmi_out", 0,
Subsignal("clk_p", Pins("B6"), IOStandard("TMDS_33")),
Subsignal("clk_n", Pins("A6"), IOStandard("TMDS_33")),
Subsignal("data0_p", Pins("D8"), IOStandard("TMDS_33")),
Subsignal("data0_n", Pins("C8"), IOStandard("TMDS_33")),
Subsignal("data1_p", Pins("C7"), IOStandard("TMDS_33")),
Subsignal("data1_n", Pins("A7"), IOStandard("TMDS_33")),
Subsignal("data2_p", Pins("B8"), IOStandard("TMDS_33")),
Subsignal("data2_n", Pins("A8"), IOStandard("TMDS_33")),
Subsignal("scl", Pins("D9"), IOStandard("I2C")),
Subsignal("sda", Pins("C9"), IOStandard("I2C")),
),
# HDMI In 0
("hdmi_in", 0,
Subsignal("clk_p", Pins("D11")),
Subsignal("clk_n", Pins("C11")),
Subsignal("data0_p", Pins("G9")),
Subsignal("data0_n", Pins("F9")),
Subsignal("data1_p", Pins("B11")),
Subsignal("data1_n", Pins("A11")),
Subsignal("data2_p", Pins("B12")),
Subsignal("data2_n", Pins("A12")),
Subsignal("scl", Pins("C13"), IOStandard("LVCMOS33")),
Subsignal("sda", Pins("A13"), IOStandard("LVCMOS33")),
),
# HDMI In 1
("hdmi_in", 1,
Subsignal("clk_p", Pins("H17")),
Subsignal("clk_n", Pins("H18")),
Subsignal("data0_p", Pins("K17")),
Subsignal("data0_n", Pins("K18")),
Subsignal("data1_p", Pins("L17")),
Subsignal("data1_n", Pins("L18")),
Subsignal("data2_p", Pins("J16")),
Subsignal("data2_n", Pins("J18")),
Subsignal("scl", Pins("M16"), IOStandard("LVCMOS33")),
Subsignal("sda", Pins("M18"), IOStandard("LVCMOS33")),
),
]
# Connectors ---------------------------------------------------------------------------------------
_connectors = [
("VHDCI",
{
"EXP-IO1_P" : "U16",
"EXP-IO2_P" : "U15",
"EXP-IO3_P" : "U13",
"EXP-IO4_P" : "M11",
"EXP-IO5_P" : "R11",
"EXP-IO6_P" : "T12",
"EXP-IO7_P" : "N10",
"EXP-IO8_P" : "M10",
"EXP-IO9_P" : "U11",
"EXP-IO10_P" : "R10",
"EXP-IO11_P" : "U10",
"EXP-IO12_P" : "R8",
"EXP-IO13_P" : "M8",
"EXP-IO14_P" : "U8",
"EXP-IO15_P" : "U7",
"EXP-IO16_P" : "N7",
"EXP-IO17_P" : "T6",
"EXP-IO18_P" : "R7",
"EXP-IO19_P" : "N6",
"EXP-IO20_P" : "U5",
"EXP-IO1_N" : "V16",
"EXP-IO2_N" : "V15",
"EXP-IO3_N" : "V13",
"EXP-IO4_N" : "N11",
"EXP-IO5_N" : "T11",
"EXP-IO6_N" : "V12",
"EXP-IO7_N" : "P11",
"EXP-IO8_N" : "N9",
"EXP-IO9_N" : "V11",
"EXP-IO10_N" : "T10",
"EXP-IO11_N" : "V10",
"EXP-IO12_N" : "T8",
"EXP-IO13_N" : "N8",
"EXP-IO14_N" : "V8",
"EXP-IO15_N" : "V7",
"EXP-IO16_N" : "P8",
"EXP-IO17_N" : "V6",
"EXP-IO18_N" : "T7",
"EXP-IO19_N" : "P7",
"EXP-IO20_N" : "V5",
}
),
]
# Platform -----------------------------------------------------------------------------------------
class Platform(XilinxPlatform):
default_clk_name = "clk100"
default_clk_period = 1e9/100e6
def __init__(self,):
XilinxPlatform.__init__(self, "xc6slx45-csg324-3", _io, _connectors)
self.add_platform_command("""CONFIG VCCAUX="3.3";""")
def create_programmer(self):
return iMPACT()
def do_finalize(self, fragment):
XilinxPlatform.do_finalize(self, fragment)
self.add_period_constraint(self.lookup_request("clk100", loose=True), 1e9/100e6)
self.add_period_constraint(self.lookup_request("hdmi_in:clk_p", 0, loose=True), 1e9/74.25e6)
self.add_period_constraint(self.lookup_request("hdmi_in:clk_p", 1, loose=True), 1e9/74.25e6)
self.add_period_constraint(self.lookup_request("eth_clocks:rx", loose=True), 1e9/25e6)
self.add_period_constraint(self.lookup_request("fx2:ifclk", loose=True), 1e9/100e6)
#!/usr/bin/env python3
#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2015 Robert Jordens <jordens@gmail.com>
# Copyright (c) 2015 Sebastien Bourdeauducq <sb@m-labs.hk>
# Copyright (c) 2015 Yann Sionneau <yann.sionneau@gmail.com>
# Copyright (c) 2016-2017 Tim 'mithro' Ansell <mithro@mithis.com>
# Copyright (c) 2019 Florent Kermarrec <florent@enjoy-digital.fr>
# SPDX-License-Identifier: BSD-2-Clause
import os
import argparse
from fractions import Fraction
from migen import *
from migen.genlib.resetsync import AsyncResetSynchronizer
from litex_boards.platforms import atlys
from litex.soc.integration.soc_core import *
from litex.soc.integration.builder import *
from litex.soc.cores.led import LedChaser
from litedram.modules import MT47H64M16
from litedram.phy import s6ddrphy
# CRG ----------------------------------------------------------------------------------------------
class _CRG(Module):
def __init__(self, platform, sys_clk_freq):
self.clock_domains.cd_sys = ClockDomain()
self.clock_domains.cd_sdram_half = ClockDomain()
self.clock_domains.cd_sdram_full_wr = ClockDomain()
self.clock_domains.cd_sdram_full_rd = ClockDomain()
self.reset = Signal()
# # #
# Input clock ------------------------------------------------------------------------------
clk100_freq = int(100e6)
clk100 = platform.request("clk100")
clk100b = Signal()
self.specials += Instance("BUFIO2",
p_DIVIDE=1, p_DIVIDE_BYPASS="TRUE",
p_I_INVERT="FALSE",
i_I=clk100, o_DIVCLK=clk100b)
# PLL --------------------------------------------------------------------------------------
pll_lckd = Signal()
pll_fb = Signal()
pll_sdram_full = Signal()
pll_sdram_half_a = Signal()
pll_sdram_half_b = Signal()
pll_unused = Signal()
pll_sys = Signal()
pll_periph = Signal()
f0 = clk100_freq
f = Fraction(int(sys_clk_freq), int(f0))
n, m = f.denominator, f.numerator
assert f0 / n * m == sys_clk_freq
p = 8
self.specials.pll = Instance(
"PLL_ADV",
name="crg_pll_adv",
p_SIM_DEVICE="SPARTAN6", p_BANDWIDTH="OPTIMIZED", p_COMPENSATION="INTERNAL",
p_REF_JITTER=.01,
i_DADDR=0, i_DCLK=0, i_DEN=0, i_DI=0, i_DWE=0, i_RST=0, i_REL=0,
p_DIVCLK_DIVIDE=1,
# Input Clocks (100MHz)
i_CLKIN1=clk100b,
p_CLKIN1_PERIOD=1e9/f0,
i_CLKIN2=0,
p_CLKIN2_PERIOD=0.,
i_CLKINSEL=1,
# Feedback
i_CLKFBIN=pll_fb, o_CLKFBOUT=pll_fb, o_LOCKED=pll_lckd,
p_CLK_FEEDBACK="CLKFBOUT",
p_CLKFBOUT_MULT=m*p//n, p_CLKFBOUT_PHASE=0.,
# (300MHz) sdram wr rd
o_CLKOUT0=pll_sdram_full, p_CLKOUT0_DUTY_CYCLE=.5,
p_CLKOUT0_PHASE=0., p_CLKOUT0_DIVIDE=p//4,
# unused?
o_CLKOUT1=pll_unused, p_CLKOUT1_DUTY_CYCLE=.5,
p_CLKOUT1_PHASE=0., p_CLKOUT1_DIVIDE=15,
# (150MHz) sdram_half - sdram dqs adr ctrl
o_CLKOUT2=pll_sdram_half_a, p_CLKOUT2_DUTY_CYCLE=.5,
p_CLKOUT2_PHASE=270., p_CLKOUT2_DIVIDE=p//2,
# (150Mhz) off-chip ddr
o_CLKOUT3=pll_sdram_half_b, p_CLKOUT3_DUTY_CYCLE=.5,
p_CLKOUT3_PHASE=250., p_CLKOUT3_DIVIDE=p//2,
# ( 50MHz) periph
o_CLKOUT4=pll_periph, p_CLKOUT4_DUTY_CYCLE=.5,
p_CLKOUT4_PHASE=0., p_CLKOUT4_DIVIDE=20,
# ( 75MHz) sysclk
o_CLKOUT5=pll_sys, p_CLKOUT5_DUTY_CYCLE=.5,
p_CLKOUT5_PHASE=0., p_CLKOUT5_DIVIDE=p//1,
)
# Power on reset
reset = ~platform.request("cpu_reset") | self.reset
self.clock_domains.cd_por = ClockDomain()
por = Signal(max=1 << 11, reset=(1 << 11) - 1)
self.sync.por += If(por != 0, por.eq(por - 1))
self.specials += AsyncResetSynchronizer(self.cd_por, reset)
# System clock
self.specials += Instance("BUFG", i_I=pll_sys, o_O=self.cd_sys.clk)
self.comb += self.cd_por.clk.eq(self.cd_sys.clk)
self.specials += AsyncResetSynchronizer(self.cd_sys, ~pll_lckd | (por > 0))
# SDRAM clocks -----------------------------------------------------------------------------
self.clk4x_wr_strb = Signal()
self.clk4x_rd_strb = Signal()
# SDRAM full clock
self.specials += Instance("BUFPLL", name="sdram_full_bufpll",
p_DIVIDE = 4,
i_PLLIN = pll_sdram_full, i_GCLK=self.cd_sys.clk,
i_LOCKED = pll_lckd,
o_IOCLK = self.cd_sdram_full_wr.clk,
o_SERDESSTROBE = self.clk4x_wr_strb)
self.comb += [
self.cd_sdram_full_rd.clk.eq(self.cd_sdram_full_wr.clk),
self.clk4x_rd_strb.eq(self.clk4x_wr_strb),
]
# SDRAM_half clock
self.specials += Instance("BUFG", name="sdram_half_a_bufpll",
i_I=pll_sdram_half_a, o_O=self.cd_sdram_half.clk)
clk_sdram_half_shifted = Signal()
self.specials += Instance("BUFG", name="sdram_half_b_bufpll",
i_I=pll_sdram_half_b, o_O=clk_sdram_half_shifted)
output_clk = Signal()
clk = platform.request("ddram_clock")
self.specials += Instance("ODDR2", p_DDR_ALIGNMENT="NONE",
p_INIT=0, p_SRTYPE="SYNC",
i_D0=1, i_D1=0, i_S=0, i_R=0, i_CE=1,
i_C0=clk_sdram_half_shifted,
i_C1=~clk_sdram_half_shifted,
o_Q=output_clk)
self.specials += Instance("OBUFDS", i_I=output_clk, o_O=clk.p, o_OB=clk.n)
# BaseSoC ------------------------------------------------------------------------------------------
class BaseSoC(SoCCore):
def __init__(self, with_ethernet=True, with_etherbone=False, eth_phy=0, **kwargs):
sys_clk_freq = int(75e6)
platform = atlys.Platform()
# SoCCore ----------------------------------------------------------------------------------
SoCCore.__init__(self, platform, sys_clk_freq,
ident = "LiteX SoC on Atlys",
ident_version = True,
**kwargs)
# CRG --------------------------------------------------------------------------------------
self.submodules.crg = _CRG(platform, sys_clk_freq)
self.platform.add_period_constraint(self.crg.cd_sys.clk, 1e9/sys_clk_freq)
# DDR2 SDRAM -------------------------------------------------------------------------------
if not self.integrated_main_ram_size:
self.submodules.ddrphy = s6ddrphy.S6HalfRateDDRPHY(platform.request("ddram"),
memtype = "DDR2",
rd_bitslip = 0,
wr_bitslip = 4,
dqs_ddr_alignment = "C0")
self.comb += [
self.ddrphy.clk4x_wr_strb.eq(self.crg.clk4x_wr_strb),
self.ddrphy.clk4x_rd_strb.eq(self.crg.clk4x_rd_strb),
]
self.add_sdram("sdram",
phy = self.ddrphy,
module = MT47H64M16(sys_clk_freq, "1:2"),
l2_cache_size = kwargs.get("l2_size", 8192),
)
# Ethernet / Etherbone ---------------------------------------------------------------------
if with_ethernet or with_etherbone:
from liteeth.phy import LiteEthPHYGMIIMII
self.submodules.ethphy = LiteEthPHYGMIIMII(
clock_pads = self.platform.request("eth_clocks", eth_phy),
pads = self.platform.request("eth", eth_phy),
clk_freq = int(self.sys_clk_freq))
if with_ethernet:
self.add_ethernet(phy=self.ethphy)
if with_etherbone:
self.add_etherbone(phy=self.ethphy)
self.ethphy.crg.cd_eth_rx.clk.attr.add("keep")
self.ethphy.crg.cd_eth_tx.clk.attr.add("keep")
self.platform.add_platform_command("""
NET "{eth_clocks_rx}" CLOCK_DEDICATED_ROUTE = FALSE;
NET "{eth_clocks_tx}" CLOCK_DEDICATED_ROUTE = FALSE;
""",
eth_clocks_rx=platform.lookup_request("eth_clocks").rx,
eth_clocks_tx=platform.lookup_request("eth_clocks").tx,
)
# 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 Atlys")
parser.add_argument("--build", action="store_true", help="Build bitstream")
parser.add_argument("--load", action="store_true", help="Load bitstream")
parser.add_argument("--with-ethernet", action="store_true", help="Enable Ethernet support")
parser.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support")
builder_args(parser)
soc_core_args(parser)
args = parser.parse_args()
soc = BaseSoC(**soc_core_argdict(args))
builder = Builder(soc, **builder_argdict(args), )
builder.build(run=args.build)
if args.load:
prog = soc.platform.create_programmer()
prog.load_bitstream(os.path.join(builder.gateware_dir, soc.build_name + ".bit"))
if __name__ == "__main__":
main()
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