#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2015-2019 Florent Kermarrec # Copyright (c) 2020 Antmicro # Copyright (c) 2022 Victor Suarez Rovere # Copyright (c) 2024 Lone Dynamics Corporation # # SPDX-License-Identifier: BSD-2-Clause # import os import sys import json from migen import * from litex.gen import * from litex_boards.platforms import machdyne_mozart_mx2 from litex.build.io import DDROutput from migen.genlib.resetsync import AsyncResetSynchronizer from litex.soc.cores.clock import * from litex.soc.cores.usb_ohci import USBOHCI from litex.soc.cores.video import VideoS7HDMIPHY from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litex.soc.interconnect.csr_eventmanager import * from litedram.phy import s7ddrphy from litedram.modules import MT41J256M16 from litex.soc.integration.soc import SoCRegion # CRG --------------------------------------------------------------------------------------------- class _CRG(LiteXModule): def __init__(self, platform, sys_clk_freq): self.rst = Signal() self.cd_por = ClockDomain() self.cd_sys = ClockDomain() self.cd_sys2x = ClockDomain() self.cd_sys4x = ClockDomain() self.cd_sys4x_dqs = ClockDomain() self.cd_init = ClockDomain() self.cd_eth = ClockDomain() self.cd_video = ClockDomain() self.cd_video5x = ClockDomain() self.cd_idelay = ClockDomain() self.cd_usb_12 = ClockDomain() self.cd_usb = ClockDomain() self.cd_usb_48 = ClockDomain() self.stop = Signal() self.reset = Signal() # Clk / Rst clk48 = platform.request("clk48") clk50 = platform.request("clk50") # Power on reset por_count = Signal(16, reset=2**16-1) por_done = Signal() self.comb += self.cd_por.clk.eq(clk48) self.comb += por_done.eq(por_count == 0) self.sync.por += If(~por_done, por_count.eq(por_count - 1)) # PLL self.pll = pll = S7PLL() self.comb += pll.reset.eq(~por_done | self.rst) pll.register_clkin(clk50, 50e6) pll.create_clkout(self.cd_sys, sys_clk_freq) pll.create_clkout(self.cd_sys2x, 2*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.idelayctrl = S7IDELAYCTRL(self.cd_idelay) self.pll2 = pll2 = S7PLL() pll2.register_clkin(clk50, 50e6) pll2.create_clkout(self.cd_eth, 50e6) pll2.create_clkout(self.cd_video, 25e6) pll2.create_clkout(self.cd_video5x, 125e6) self.cd_usb_48 = self.cd_usb self.pll3 = pll3 = S7PLL() self.comb += pll3.reset.eq(~por_done) pll3.register_clkin(clk48, 48e6) pll3.create_clkout(self.cd_usb, 48e6) pll3.create_clkout(self.cd_usb_12, 12e6) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): mem_map = {**SoCCore.mem_map, **{ "usb_ohci": 0xc0000000, }} def __init__(self, revision="v0", variant="a7-35", toolchain="vivado", sys_clk_freq=int(75e6), with_usb_host=False, with_ethernet=False, with_xadc=False, **kwargs): platform = machdyne_mozart_mx2.Platform(revision=revision, variant=variant, toolchain=toolchain) # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Mozart MX1", **kwargs) # DRAM ------------------------------------------------------------------------------------- if not self.integrated_main_ram_size: self.ddrphy = s7ddrphy.A7DDRPHY(platform.request("ddram"), memtype = "DDR3", nphases = 4, sys_clk_freq = sys_clk_freq) self.add_sdram("sdram", phy = self.ddrphy, module = MT41J256M16(sys_clk_freq, "1:4"), l2_cache_size = kwargs.get("l2_size", 8192) ) # XADC ------------------------------------------------------------------------------------- if with_xadc: self.xadc = XADC() # SPI Flash -------------------------------------------------------------------------------- from litespi.modules import W25Q32 from litespi.opcodes import SpiNorFlashOpCodes as Codes self.add_spi_flash(mode="4x", module=W25Q32(Codes.READ_1_1_1), with_master=False) # DDMI Framebuffer ------------------------------------------------------------------------------------- self.videophy = VideoS7HDMIPHY(platform.request("ddmi"), clock_domain="video") self.add_video_framebuffer(phy=self.videophy, timings="640x480@60Hz", clock_domain="video", format="rgb565") # USB Host --------------------------------------------------------------------------------- if with_usb_host: self.usb_ohci = USBOHCI(platform, platform.request("usb_host"), usb_clk_freq=int(48e6)) 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) # Ethernet --------------------------------------------------------------------------------- if with_ethernet: from liteeth.phy.rmii import LiteEthPHYRMII self.ethphy = LiteEthPHYRMII( clock_pads = None, pads = platform.request("eth"), with_hw_init_reset = True, refclk_cd = "eth") self.add_ethernet(phy=self.ethphy) # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=machdyne_mozart_mx2.Platform, description="LiteX SoC on Mozart MX2.") parser.add_argument("--sys-clk-freq", default=75e6, help="System clock frequency.") parser.add_argument("--revision", default="v0", help="Board Revision (v0).") parser.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support.") parser.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support.") parser.add_argument("--with-usb-host", action="store_true", help="Enable USB host support.") parser.add_argument("--with-ethernet", action="store_true", help="Enable ethernet support.") args = parser.parse_args() soc = BaseSoC( toolchain = args.toolchain, revision = args.revision, sys_clk_freq = int(float(args.sys_clk_freq)), with_usb_host = args.with_usb_host, with_ethernet = args.with_ethernet, **parser.soc_argdict) if args.with_sdcard: soc.add_sdcard() if args.with_spi_sdcard: soc.add_spi_sdcard() builder = Builder(soc, **parser.builder_argdict) if args.build: builder.build(**parser.toolchain_argdict) if __name__ == "__main__": main()