from fractions import Fraction from math import ceil from operator import itemgetter from migen.fhdl.structure import * from migen.fhdl.module import Module from migen.bus import wishbone, wishbone2asmi, csr, wishbone2csr, dfi from migen.bank import csrgen from milkymist import m1crg, lm32, norflash, uart, s6ddrphy, dfii, asmicon, \ identifier, timer, minimac3, framebuffer, asmiprobe, dvisampler from cif import get_macros version = get_macros("common/version.h")["VERSION"][1:-1] clk_freq = (83 + Fraction(1, 3))*1000000 sram_size = 4096 # in bytes l2_size = 8192 # in bytes clk_period_ns = 1000000000/clk_freq def ns(t, margin=True): if margin: t += clk_period_ns/2 return ceil(t/clk_period_ns) sdram_phy = asmicon.PhySettings( dfi_d=64, nphases=2, rdphase=0, wrphase=1 ) sdram_geom = asmicon.GeomSettings( bank_a=2, row_a=13, col_a=10 ) sdram_timing = asmicon.TimingSettings( tRP=ns(15), tRCD=ns(15), tWR=ns(15), tREFI=ns(7800, False), tRFC=ns(70), CL=3, rd_delay=4, read_time=32, write_time=16 ) class M1ClockPads: def __init__(self, platform): self.clk50 = platform.request("clk50") self.trigger_reset = platform.request("user_btn", 1) self.norflash_rst_n = platform.request("norflash_rst_n") self.vga_clk = platform.request("vga_clock") ddram_clock = platform.request("ddram_clock") self.ddr_clk_p = ddram_clock.p self.ddr_clk_n = ddram_clock.n eth_clocks = platform.request("eth_clocks") self.eth_phy_clk = eth_clocks.phy self.eth_rx_clk = eth_clocks.rx self.eth_tx_clk = eth_clocks.tx class SoC(Module): csr_base = 0xe0000000 csr_map = { "crg": 0, "uart": 1, "dfii": 2, "identifier": 3, "timer0": 4, "minimac": 5, "fb": 6, "asmiprobe": 7, "dvisampler0": 8, "dvisampler0_edid_mem": 9, "dvisampler1": 10, "dvisampler1_edid_mem": 11, } interrupt_map = { "uart": 0, "timer0": 1, "minimac": 2, "dvisampler0": 3, "dvisampler1": 4, } def __init__(self, platform): # # ASMI # self.submodules.asmicon = asmicon.ASMIcon(sdram_phy, sdram_geom, sdram_timing) asmiport_wb = self.asmicon.hub.get_port() asmiport_fb0 = self.asmicon.hub.get_port(2) asmiport_fb1 = self.asmicon.hub.get_port(2) asmiport_dvi0 = self.asmicon.hub.get_port(2) asmiport_dvi1 = self.asmicon.hub.get_port(2) self.asmicon.finalize() # # DFI # self.submodules.ddrphy = s6ddrphy.S6DDRPHY(platform.request("ddram")) self.submodules.dfii = dfii.DFIInjector(sdram_geom.mux_a, sdram_geom.bank_a, sdram_phy.dfi_d, sdram_phy.nphases) self.submodules.dficon0 = dfi.Interconnect(self.dfii.master, self.ddrphy.dfi) self.submodules.dficon1 = dfi.Interconnect(self.asmicon.dfi, self.dfii.slave) # # WISHBONE # self.submodules.cpu = lm32.LM32() self.submodules.norflash = norflash.NorFlash(platform.request("norflash"), 12) self.submodules.sram = wishbone.SRAM(sram_size) self.submodules.minimac = minimac3.MiniMAC(platform.request("eth")) self.submodules.wishbone2asmi = wishbone2asmi.WB2ASMI(l2_size//4, asmiport_wb) self.submodules.wishbone2csr = wishbone2csr.WB2CSR() # norflash 0x00000000 (shadow @0x80000000) # SRAM/debug 0x10000000 (shadow @0x90000000) # USB 0x20000000 (shadow @0xa0000000) # Ethernet 0x30000000 (shadow @0xb0000000) # SDRAM 0x40000000 (shadow @0xc0000000) # CSR bridge 0x60000000 (shadow @0xe0000000) self.submodules.wishbonecon = wishbone.InterconnectShared( [ self.cpu.ibus, self.cpu.dbus ], [ (lambda a: a[26:29] == 0, self.norflash.bus), (lambda a: a[26:29] == 1, self.sram.bus), (lambda a: a[26:29] == 3, self.minimac.membus), (lambda a: a[27:29] == 2, self.wishbone2asmi.wishbone), (lambda a: a[27:29] == 3, self.wishbone2csr.wishbone) ], register=True) # # CSR # self.submodules.crg = m1crg.M1CRG(M1ClockPads(platform), clk_freq) self.submodules.uart = uart.UART(platform.request("serial"), clk_freq, baud=115200) self.submodules.identifier = identifier.Identifier(0x4D31, version, int(clk_freq)) self.submodules.timer0 = timer.Timer() self.submodules.fb = framebuffer.MixFramebuffer(platform.request("vga"), asmiport_fb0, asmiport_fb1) self.submodules.asmiprobe = asmiprobe.ASMIprobe(self.asmicon.hub) self.submodules.dvisampler0 = dvisampler.DVISampler(platform.request("dvi_in", 0), asmiport_dvi0) self.submodules.dvisampler1 = dvisampler.DVISampler(platform.request("dvi_in", 1), asmiport_dvi1) self.submodules.csrbankarray = csrgen.BankArray(self, lambda name, memory: self.csr_map[name if memory is None else name + "_" + memory.name_override]) self.submodules.csrcon = csr.Interconnect(self.wishbone2csr.csr, self.csrbankarray.get_buses()) # # Interrupts # for k, v in sorted(self.interrupt_map.items(), key=itemgetter(1)): if hasattr(self, k): self.comb += self.cpu.interrupt[v].eq(getattr(self, k).ev.irq) # # Clocking # self.comb += [ self.ddrphy.clk4x_wr_strb.eq(self.crg.clk4x_wr_strb), self.ddrphy.clk4x_rd_strb.eq(self.crg.clk4x_rd_strb) ]