#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) Greg Davill # Copyright (c) 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_kopflos from litex.build.lattice.trellis import trellis_args, trellis_argdict from litex.build.io import DDROutput from migen.genlib.resetsync import AsyncResetSynchronizer from litex.soc.cores.clock import * from litex.soc.cores.led import LedChaser from litex.soc.cores.usb_ohci import USBOHCI from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litex.soc.interconnect.csr_eventmanager import * from litedram.modules import MT41K64M16, MT41K128M16, MT41K256M16, MT41K512M16 from litedram.phy import ECP5DDRPHY from litedram.phy import GENSDRPHY, HalfRateGENSDRPHY from litex.soc.integration.soc import SoCRegion # CRG --------------------------------------------------------------------------------------------- class _CRG(LiteXModule): def __init__(self, platform, sys_clk_freq, sdram_rate): self.rst = Signal() self.cd_por = ClockDomain() self.cd_sys = ClockDomain() self.cd_sys2x = ClockDomain() self.cd_sys2x_i = ClockDomain() self.cd_init = ClockDomain() self.stop = Signal() self.reset = Signal() # Clk / Rst clk48 = platform.request("clk48") # 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 sys2x_clk_ecsout = Signal() self.pll = pll = ECP5PLL() self.comb += pll.reset.eq(~por_done | self.rst) pll.register_clkin(clk48, 48e6) pll.create_clkout(self.cd_sys2x_i, 2*sys_clk_freq) pll.create_clkout(self.cd_init, 24e6) self.specials += [ Instance("ECLKBRIDGECS", i_CLK0 = self.cd_sys2x_i.clk, i_SEL = 0, o_ECSOUT = sys2x_clk_ecsout), Instance("ECLKSYNCB", i_ECLKI = sys2x_clk_ecsout, i_STOP = self.stop, o_ECLKO = self.cd_sys2x.clk), Instance("CLKDIVF", p_DIV = "2.0", i_ALIGNWD = 0, i_CLKI = self.cd_sys2x.clk, i_RST = self.reset, o_CDIVX = self.cd_sys.clk), AsyncResetSynchronizer(self.cd_sys, ~pll.locked | self.reset), ] pll2 = ECP5PLL() self.pll2 = pll2 pll2.register_clkin(clk48, 48e6) self.cd_usb_12 = ClockDomain() self.cd_usb = ClockDomain() self.cd_usb_48 = ClockDomain() self.cd_usb_48 = self.cd_usb pll2.create_clkout(self.cd_usb, 48e6) pll2.create_clkout(self.cd_usb_12, 12e6) self.comb += pll2.reset.eq(~por_done) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): mem_map = {**SoCCore.mem_map, **{ "usb_ohci": 0xc0000000, }} def __init__(self, revision="v0", device="12F", sdram_device="MT41K128M16", sdram_rate="1:2", sys_clk_freq=int(40e6), toolchain="trellis", with_led_chaser=True, with_usb_host=False, with_ethernet=False, **kwargs): platform = machdyne_kopflos.Platform(revision=revision, device=device ,toolchain=toolchain) # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq, sdram_rate=sdram_rate) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Schoko", **kwargs) # DDR3L ---------------------------------------------------------------------------------- if not self.integrated_main_ram_size: available_sdram_modules = { "MT41K64M16": MT41K64M16, "MT41K128M16": MT41K128M16, "MT41K256M16": MT41K256M16, "MT41K512M16": MT41K512M16, } sdram_module = available_sdram_modules.get(sdram_device) ddram_pads = platform.request("ddram") self.ddrphy = ECP5DDRPHY( pads = ddram_pads, sys_clk_freq = sys_clk_freq, cmd_delay = 0 if sys_clk_freq > 64e6 else 100) self.ddrphy.settings.rtt_nom = "disabled" self.comb += self.crg.stop.eq(self.ddrphy.init.stop) self.comb += self.crg.reset.eq(self.ddrphy.init.reset) self.add_sdram("sdram", phy = self.ddrphy, module = sdram_module(sys_clk_freq, "1:2"), l2_cache_size = kwargs.get("l2_size", 8192) ) # 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) if with_ethernet: from liteeth.phy.rmii import LiteEthPHYRMII self.ethphy = LiteEthPHYRMII( clock_pads = platform.request("eth_clocks"), pads = platform.request("eth"), with_hw_init_reset=True, refclk_cd=None) self.add_ethernet(phy=self.ethphy) # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=machdyne_kopflos.Platform, description="LiteX SoC on Schoko") parser.add_argument("--sys-clk-freq", default=40e6, help="System clock frequency.") parser.add_argument("--revision", default="v0", help="Board Revision (v0).") parser.add_argument("--device", default="12F", help="ECP5 device (12F, 25F, 45F or 85F).") parser.add_argument("--cable", default="dirtyJtag", help="Specify an openFPGALoader cable.") 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.") parser.add_argument("--sdram-device", default="MT41K128M16", help="SDRAM device.") args = parser.parse_args() soc = BaseSoC( toolchain = args.toolchain, revision = args.revision, device = args.device, sys_clk_freq = int(float(args.sys_clk_freq)), sdram_device = args.sdram_device, 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 args.load: prog = soc.platform.create_programmer() prog.load_bitstream(builder.get_bitstream_filename(mode="sram")) if __name__ == "__main__": main()