litex-boards/litex_boards/targets/mnt_rkx7.py

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#!/usr/bin/env python3
#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2021 Florent Kermarrec <florent@enjoy-digital.fr>
# Copyright (c) 2022 Lukas F. Hartmann, MNT Research GmbH <lukas@mntre.com>
# SPDX-License-Identifier: BSD-2-Clause
from migen import *
from litex.gen import LiteXModule
from litex_boards.platforms import mnt_rkx7
from litex.soc.cores.clock import *
from litex.soc.integration.soc_core import *
from litex.soc.integration.soc import SoCRegion
from litex.soc.integration.builder import *
from litex.soc.interconnect.csr import *
from litex.soc.interconnect.axi import *
from litex.soc.interconnect.wishbone import *
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from litex.soc.cores.bitbang import I2CMaster
from litex.soc.cores.gpio import GPIOOut
from litex.soc.cores.video import VideoDVIPHY
from litex.soc.cores.usb_ohci import USBOHCI
from migen.fhdl.specials import Tristate
from litedram.modules import IS43TR16512B
from litedram.phy import s7ddrphy
from liteeth.phy.s7rgmii import LiteEthPHYRGMII
# CRG ----------------------------------------------------------------------------------------------
class _CRG(LiteXModule):
def __init__(self, platform, sys_clk_freq):
self.rst = Signal()
self.cd_sys = ClockDomain()
self.cd_sys4x = ClockDomain()
self.cd_idelay = ClockDomain()
self.cd_dvi = ClockDomain(reset_less=True)
self.cd_usb = ClockDomain()
clkin = platform.request("clk100")
self.pll = pll = S7MMCM(speedgrade=-2)
self.comb += pll.reset.eq(self.rst)
# Main clock input (100MHz)
pll.register_clkin(clkin, 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_idelay, 200e6)
# Ignore sys_clk to pll.clkin path created by SoC's rst.
platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin)
# USB clock
pll.create_clkout(self.cd_usb, 48e6)
self.pll2 = pll2 = S7MMCM(speedgrade=-2)
self.comb += pll2.reset.eq(self.rst)
pll2.register_clkin(clkin, 100e6)
# DVI/HDMI pixel clock
pll2.create_clkout(self.cd_dvi, 80e6) # display wants 162e6, but we can underclock
platform.add_false_path_constraints(self.cd_sys.clk, pll2.clkin)
self.idelayctrl = S7IDELAYCTRL(self.cd_idelay)
# BaseSoC ------------------------------------------------------------------------------------------
class BaseSoC(SoCCore):
mem_map = {**SoCCore.mem_map, **{
# FIXME: ends up as 0x7f000000 in linux
"video_framebuffer": 0x3f000000,
"usb_ohci": 0xc0000000,
}}
def __init__(self, sys_clk_freq=int(100e6), with_ethernet=True, with_etherbone=False,
with_spi_flash=True, with_usb_host=False, **kwargs):
platform = mnt_rkx7.Platform()
# CRG --------------------------------------------------------------------------------------
self.crg = _CRG(platform, sys_clk_freq)
# SoCCore ----------------------------------------------------------------------------------
SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on MNT-RKX7", **kwargs)
# DDR3 SDRAM -------------------------------------------------------------------------------
if not self.integrated_main_ram_size:
self.ddrphy = s7ddrphy.K7DDRPHY(platform.request("ddram"),
memtype = "DDR3",
nphases = 4,
sys_clk_freq = sys_clk_freq)
self.add_sdram("sdram",
phy = self.ddrphy,
module = IS43TR16512B(sys_clk_freq, "1:4"),
size = 0x40000000,
l2_cache_size = kwargs.get("l2_size", 8192), # TBD: is L2 really necessary?
)
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# SPI Flash --------------------------------------------------------------------------------
if with_spi_flash:
from litespi.modules import W25Q128JV
from litespi.opcodes import SpiNorFlashOpCodes as Codes
self.add_spi_flash(mode="4x", module=W25Q128JV(Codes.READ_1_1_4), rate="1:1", with_master=True)
# Ethernet / Etherbone ---------------------------------------------------------------------
if with_ethernet or with_etherbone:
self.ethphy = LiteEthPHYRGMII(
clock_pads = self.platform.request("eth_clocks"),
pads = self.platform.request("eth"))
platform.add_platform_command("set_property CLOCK_DEDICATED_ROUTE FALSE [get_nets {{main_ethphy_eth_rx_clk_ibuf}}]")
platform.add_platform_command("set_property CLOCK_DEDICATED_ROUTE FALSE [get_nets {{soclinux_ethphy_eth_rx_clk_ibuf}}]")
if with_ethernet:
self.add_ethernet(phy=self.ethphy, dynamic_ip=True, software_debug=False)
if with_etherbone:
self.add_etherbone(phy=self.ethphy)
# GPIO -------------------------------------------------------------------------------------
# Controllable as faux "leds"
# These are reset pins of various chips
# We toggle them in LiteX BIOS
reset_signals = platform.request("resets")
self.comb += reset_signals.eq(Signal(6, reset=0b111111))
gpio_signals = platform.request("gpio")
self.leds = GPIOOut(gpio_signals)
# Additional I2C Ports ---------------------------------------------------------------------
self.i2c0 = I2CMaster(platform.request("i2c", 0))
self.i2c1 = I2CMaster(platform.request("i2c", 1))
self.i2c2 = I2CMaster(platform.request("i2c", 2))
# JTAG -------------------------------------------------------------------------------------
#self.add_jtagbone()
# Backlight --------------------------------------------------------------------------------
# Motherboard display connector backlight, currently unused (the new backlight signals
# are on the 50pin RGB->eDP connector)
backlight = platform.request("backlight")
self.comb += backlight.en.eq(Signal(reset=1))
self.comb += backlight.pwm.eq(Signal(reset=1))
# eDP --------------------------------------------------------------------------------------
video_timings = ("1920x1080@rkx7", {
"pix_clk" : 162e6,
"h_active" : 1920,
"h_blanking" : 159, # off by one in vtg
"h_sync_offset" : 40,
"h_sync_width" : 40,
"v_active" : 1080,
"v_blanking" : 32,
"v_sync_offset" : 4,
"v_sync_width" : 4,
})
self.videophy = VideoDVIPHY(platform.request("edp"), clock_domain="dvi")
self.add_video_framebuffer(phy=self.videophy, timings=video_timings, clock_domain="dvi")
# HDMI -------------------------------------------------------------------------------------
# Untested: 2x VideoDVIPHYs and framebuffers in parallel
#self.videophy = VideoDVIPHY(platform.request("hdmi"), clock_domain="dvi")
# USB Host ---------------------------------------------------------------------------------
if with_usb_host:
self.usb_ohci = USBOHCI(platform, platform.request("usb"))
self.bus.add_slave("usb_ohci_ctrl", self.usb_ohci.wb_ctrl, region=SoCRegion(origin=self.mem_map["usb_ohci"], size=0x100000, cached=False))
self.dma_bus.add_master("usb_ohci_dma", master=self.usb_ohci.wb_dma)
self.comb += self.cpu.interrupt[16].eq(self.usb_ohci.interrupt)
# LiteScope UART
self.add_uartbone(name="litescope_serial")
# LiteScope Analyzer (optional)
# analyzer_signals = [
# ulpi_data.din,
# utmi.linestate,
# utmi.txvalid,
# utmi.rxerror,
# utmi.rxvalid,
# usb_ulpi.dir,
# usb_ulpi.stp,
# usb_ulpi.nxt,
# usbh_dbg_state,
# ulpi_dbg_state,
# usb_host_intr,
# usb_host_dbg_intr,
# ]
# from litescope import LiteScopeAnalyzer
# self.analyzer = LiteScopeAnalyzer(analyzer_signals,
# depth = 256,
# clock_domain = "ulpi",
# csr_csv = "analyzer.csv")
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# Build --------------------------------------------------------------------------------------------
def main():
from litex.build.parser import LiteXArgumentParser
parser = LiteXArgumentParser(platform=mnt_rkx7.Platform, description="LiteX SoC on MNT-RKX7")
parser.add_target_argument("--sys-clk-freq", default=100e6, help="System clock frequency.")
parser.add_target_argument("--with-spi-flash", action="store_true", default=True, help="Enable SPI Flash (MMAPed).")
parser.add_target_argument("--with-usb-host", action="store_true", default=False, help="Enable USB host support.")
sdopts = parser.target_group.add_mutually_exclusive_group()
sdopts.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support.")
sdopts.add_argument("--with-sdcard", action="store_true", default=True, help="Enable SDCard support.")
ethopts = parser.target_group.add_mutually_exclusive_group()
ethopts.add_argument("--with-ethernet", action="store_true", default=True, help="Enable Ethernet support.")
ethopts.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support.")
args = parser.parse_args()
soc = BaseSoC(
sys_clk_freq = int(float(args.sys_clk_freq)),
with_ethernet = args.with_ethernet,
with_etherbone = args.with_etherbone,
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with_spi_flash = args.with_spi_flash,
with_usb_host = args.with_usb_host,
**parser.soc_core_argdict
)
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if args.with_spi_sdcard:
soc.add_spi_sdcard()
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if args.with_sdcard:
soc.add_sdcard()
args.csr_csv="csr.csv"
builder = Builder(soc, **parser.builder_argdict)
if args.build:
builder.build(**parser.toolchain_argdict)
if args.load:
prog = soc.platform.create_programmer()
prog.load_bitstream(builder.get_bitstream_filename(mode="sram"))
if __name__ == "__main__":
main()