#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2019 Arnaud Durand # Copyright (c) 2022 Martin Hubacek @hubmartin (Twitter) # Copyright (c) 2022 Raptor Engineering, LLC # SPDX-License-Identifier: BSD-2-Clause from migen import * from migen.genlib.resetsync import AsyncResetSynchronizer from litex.gen import LiteXModule from litex.build.lattice.trellis import trellis_args, trellis_argdict from litex_boards.platforms import rcs_arctic_tern_bmc_card from litex.soc.cores.clock import * from litex.soc.integration.soc_core import * from litex.soc.integration.builder import * from litex.soc.integration.soc import SoCRegion from litedram.modules import MT41J256M16 from litedram.phy import ECP5DDRPHY from liteeth.phy.ecp5rgmii import LiteEthPHYRGMII from litex.soc.cores.video import VideoGenericPHY # CRG ---------------------------------------------------------------------------------------------- class _CRG(LiteXModule): def __init__(self, platform, sys_clk_freq): self.rst = Signal() self.cd_init = ClockDomain() self.cd_por = ClockDomain() self.cd_sys = ClockDomain() self.cd_sys2x = ClockDomain() self.cd_sys2x_i = ClockDomain() self.cd_sys2x_eb = ClockDomain() self.cd_dvo = ClockDomain() # # # self.stop = Signal() self.reset = Signal() # Clk / Rst clk125 = platform.request("clk125") rst_n = platform.request("rst_n") self.clk_inv_alignwd = Signal() self.sys_inv_clk_bridge = Signal() self.sys_inv_clk_syncb = Signal() # Power on reset por_count = Signal(16, reset=2**16-1) por_done = Signal() 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 | ~rst_n | self.rst) pll.register_clkin(clk125, 125e6) pll.create_clkout(self.cd_sys2x_i, 2*sys_clk_freq) pll.create_clkout(self.cd_init, 24e6) self.specials += [ Instance("OSCG", p_DIV = 128, # 2.4MHz o_OSC = self.cd_por.clk), 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), ] # Generate DVO clock pll.create_clkout(self.cd_dvo, 40e6) # 800x600@60 #pll.create_clkout(self.cd_dvo, 148.35e6) # 1920x1080@60 #pll.create_clkout(self.cd_dvo, 148.2e6) # 1920x1200@60 # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, sys_clk_freq=int(50e6), toolchain="trellis", with_video_colorbars = False, with_video_terminal = True, with_video_framebuffer = False, with_ethernet = False, with_etherbone = False, eth_ip = "192.168.1.50", **kwargs): platform = rcs_arctic_tern_bmc_card.Platform(toolchain=toolchain) # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq) # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, irq_n_irqs=16, clk_freq=sys_clk_freq, ident = "LiteX SoC on Arctic Tern (BMC card carrier)", **kwargs ) # DDR3 SDRAM ------------------------------------------------------------------------------- self.ddrphy = ECP5DDRPHY( platform.request("ddram"), sys_clk_freq=sys_clk_freq) 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 = MT41J256M16(sys_clk_freq, "1:2"), # Not MT41J256M16, but the AS4C256M16D3C in use has similar specifications l2_cache_size = kwargs.get("l2_size", 8192), ) # Ethernet / Etherbone --------------------------------------------------------------------- if with_ethernet or with_etherbone: self.ethphy = LiteEthPHYRGMII( clock_pads = self.platform.request("eth_clocks", 0), pads = self.platform.request("eth", 0), tx_delay = 0e-9, rx_delay = 0e-9) if with_ethernet: self.add_ethernet(phy=self.ethphy) if with_etherbone: self.add_etherbone(phy=self.ethphy, ip_address=eth_ip) # Video Output ----------------------------------------------------------------------------- if with_video_colorbars or with_video_terminal or with_video_framebuffer: dvo_pads = platform.request("dvo") self.videophy = VideoGenericPHY(dvo_pads, clock_domain="dvo", with_clk_ddr_output=False) if with_video_terminal: #self.add_video_terminal(phy=self.videophy, timings="1920x1080@60Hz", clock_domain="dvo") #self.add_video_terminal(phy=self.videophy, timings="1920x1200@60Hz", clock_domain="dvo") self.add_video_terminal(phy=self.videophy, timings="800x600@60Hz", clock_domain="dvo") elif with_video_framebuffer: #self.add_video_framebuffer(phy=self.videophy, timings="1920x1080@60Hz", clock_domain="dvo") #self.add_video_framebuffer(phy=self.videophy, timings="1920x1200@60Hz", clock_domain="dvo") self.add_video_framebuffer(phy=self.videophy, timings="800x600@60Hz", clock_domain="dvo") else: self.add_video_colorbars(phy=self.videophy, timings="800x600@60Hz", clock_domain="dvo") # Build -------------------------------------------------------------------------------------------- def main(): from litex.soc.integration.soc import LiteXSoCArgumentParser parser = LiteXSoCArgumentParser(description="LiteX SoC on Arctic Tern (BMC card carrier)") target_group = parser.add_argument_group(title="Target options") target_group.add_argument("--build", action="store_true", help="Build design") target_group.add_argument("--load", action="store_true", help="Load bitstream") target_group.add_argument("--toolchain", default="trellis", help="FPGA toolchain: trellis (default) or diamond") target_group.add_argument("--sys-clk-freq", default=60e6, help="System clock frequency (default: 60MHz)") ethopts = target_group.add_mutually_exclusive_group() ethopts.add_argument("--with-ethernet", action="store_true", help="Enable Ethernet support.") ethopts.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support.") target_group.add_argument("--eth-ip", default="192.168.1.50", type=str, help="Ethernet/Etherbone IP address.") builder_args(parser) soc_core_args(parser) trellis_args(parser) args = parser.parse_args() soc = BaseSoC( toolchain = args.toolchain, sys_clk_freq = int(float(args.sys_clk_freq)), with_ethernet = args.with_ethernet, with_etherbone = args.with_etherbone, eth_ip = args.eth_ip, **soc_core_argdict(args)) builder = Builder(soc, **builder_argdict(args)) builder_kargs = trellis_argdict(args) if args.toolchain == "trellis" else {} if args.build: builder.build(**builder_kargs) if args.load: prog = soc.platform.create_programmer() prog.load_bitstream(builder.get_bitstream_filename(mode="sram", ext=".svf")) # FIXME if __name__ == "__main__": main()