add goblin to common

nubus-to-ztex-gateware/VintageBusFPGA_Common

@@ -1 +1 @@
-Subproject commit 0de12910a247bd96f3e90db971de137c6e5ffa43
+Subproject commit 06c4327335c34b0adaac18f9a3dc9c1badc19953

nubus-to-ztex-gateware/mdio.py

@@ -0,0 +1,205 @@
+from migen import *
+from migen.genlib.fifo import *
+from migen.fhdl.specials import Tristate
+
+from litex.soc.interconnect.csr import *
+
+import litex
+
+class MDIOCtrl(Module, AutoCSR):
+    def __init__(self, platform):
+        
+        div_clk_begin = 39
+        div_clk_half = 20
+        
+        sig_mdc = platform.request("sep_mdc");
+        sig_mdio = platform.request("sep_mdio");
+        mdio_o = Signal()
+        mdio_oe = Signal()
+        mdio_i = Signal()
+
+        clk_div = Signal(log2_int(div_clk_begin, False))
+        int_cnt = Signal(log2_int(32))
+        rdata = Signal(32) # DEBUG, should be 16, FIXME
+        cmd_recv = Signal()
+        
+        self.specials += Tristate(sig_mdio, mdio_o, mdio_oe, mdio_i)
+
+        self.reg_addr = reg_addr = CSRStorage(fields = [CSRField("reg_addr",  5, description = "Reg Addr"),
+                                                        CSRField("reserved", 27, description = "Reserved"),])
+        self.phy_addr = phy_addr = CSRStorage(fields = [CSRField("phy_addr",  5, description = "Phy Addr"),
+                                                        CSRField("reserved", 27, description = "Reserved"),])
+        self.mdio_command = mdio_command = CSRStorage(fields = [CSRField("read",  1, description = "Read"),
+                                                                CSRField("write", 1, description = "write"),
+                                                                CSRField("reserved", 30, description = "Reserved"),])
+        self.mdio_status = mdio_status = CSRStatus(fields = [CSRField("access_complete",  1, description = "Phy Addr"),
+                                                             CSRField("busy", 1, description = "busy"),
+                                                             CSRField("reserved", 30, description = "Reserved"),])
+        self.mdio_write = mdio_write = CSRStorage(fields = [CSRField("val",  16, description = "writeval"),
+                                                            CSRField("reserved", 16, description = "Reserved"),])
+        #self.mdio_read = mdio_read = CSRStatus(fields = [CSRField("val",  16, description = "readval"),
+        #                                                 CSRField("reserved", 16, description = "Reserved"),])
+        self.mdio_read = mdio_read = CSRStatus(fields = [CSRField("val",  32, description = "readval"),]) # DEBUG, should be 16, FIXME
+        
+        self.submodules.wishbone_fsm = mdio_fsm = FSM(reset_state = "Reset")
+
+        self.comb += [
+            mdio_status.fields.access_complete.eq(mdio_fsm.ongoing("Idle")),
+            mdio_status.fields.busy.eq(cmd_recv),
+            mdio_read.fields.val.eq(rdata),
+        ]
+
+        output_data = Signal(32)
+        in_preamble = Signal()
+        shift_od = Signal()
+        self.sync += [
+            If(shift_od,
+               output_data.eq(Cat(Signal(1, reset = 0), output_data[0:31])),
+            ),
+        ]
+        self.comb += [
+            #If(in_preamble,
+            #   mdio_o.eq(1),
+            #).Else(
+            #    mdio_o.eq(output_data[31]),
+            #),
+            mdio_o.eq(in_preamble | output_data[31]),
+        ]
+        shift_rd = Signal()
+        shift_rd2 = Signal()
+        self.sync += [
+            shift_rd2.eq(shift_rd), # delay by one cycle
+            If(shift_rd2,
+               output_data.eq(Cat(rdata[1:32], Signal(1, reset = 0))), # DEBUG, should be 16, FIXME
+            ),
+        ]
+
+        mdc = Signal()
+        self.comb += [ sig_mdc.eq(mdc), ]
+        self.sync += [
+            If(clk_div == 0,
+               clk_div.eq(div_clk_begin),
+               mdc.eq(1),
+            ).Else(
+                If(clk_div == div_clk_half,
+                   mdc.eq(0),
+                ),
+                clk_div.eq(clk_div - 1),
+            ),
+            If(mdio_command.re,
+               cmd_recv.eq(1),
+            ),
+        ]
+
+        write = Signal()
+        
+        mdio_fsm.act("Reset",
+                     NextState("Idle")
+        )
+        mdio_fsm.act("Idle",
+                     in_preamble.eq(0),
+                     mdio_oe.eq(0), # don't drive
+                     #mdio_oe.eq(1), # drive 0 at idle ?
+                     If(cmd_recv & (clk_div == 2), # CHECKME
+                        NextValue(cmd_recv, 0),
+                        NextValue(write, mdio_command.fields.write),
+                        
+                        NextValue(output_data[0:16], mdio_write.fields.val),
+                        NextValue(output_data[16:18], 0x2), # TA
+                        NextValue(output_data[18:23], reg_addr.fields.reg_addr),
+                        NextValue(output_data[23:28], phy_addr.fields.phy_addr),
+                        If(mdio_command.fields.write,
+                           NextValue(output_data[28:30], 0x1), # write
+                        ).Else(
+                            NextValue(output_data[28:30], 0x2), # read
+                            NextValue(rdata, 0xFFFFFFFF),
+                        ),
+                        NextValue(output_data[30:32], 0x1), # start
+                        in_preamble.eq(1),
+                        mdio_oe.eq(1),
+                        NextValue(int_cnt, 31),
+                        NextState("Preamble"),
+                     )
+        )
+        
+        mdio_fsm.act("Preamble",
+                     in_preamble.eq(1),
+                     mdio_oe.eq(1),
+                     If(clk_div == 2, # CHECKME
+                        If(int_cnt == 0,
+                           NextValue(int_cnt, 31),
+                           in_preamble.eq(0), # switch mdio_o to MSb of output_data
+                           If(write,
+                              NextState("WData"),
+                           ).Else(
+                               NextState("RData"),
+                           ),
+                        ).Else(
+                            NextValue(int_cnt, int_cnt - 1),
+                            NextState("Preamble"),
+                        )
+                     ),
+        )
+                       
+        mdio_fsm.act("WData",
+                     in_preamble.eq(0),
+                     mdio_oe.eq(1),
+                     If(clk_div == 2,
+                        shift_od.eq(1), # so during clk_div == 1, output will move to the next bit
+                        NextValue(int_cnt, int_cnt - 1),
+                        If(int_cnt == 0,
+                           mdio_o.eq(1), # help pull-ups
+                           mdio_oe.eq(0), # stop driving
+                           NextValue(output_data, 0), # make sure it's zero
+                           NextState("Idle"), ## fixme: delay to idle by one MDC clok cycle?
+                        )
+                     ),
+        )
+                       
+        mdio_fsm.act("RData",
+                     in_preamble.eq(0),
+                     mdio_oe.eq(1),
+                     If(clk_div == 2,
+                        shift_od.eq(1), # so during clk_div == 2, output will move to the next bit
+                        NextValue(int_cnt, int_cnt - 1),
+                        If(int_cnt == 18,
+                           #mdio_o.eq(1), # help pull-ups
+                           #mdio_oe.eq(0), # stop driving during TA
+                           NextState("TA"),
+                        )
+                     ),
+        )
+                       
+        mdio_fsm.act("TA",
+                     mdio_oe.eq(0),
+                     If(clk_div == 2,
+                        NextValue(rdata[15], mdio_i), # DEBUG, will capture on 17 and 16, will be flushed by shifting
+                        shift_rd.eq(1), # DEBUG, shift in 2 cycles to make room
+                        NextValue(int_cnt, int_cnt - 1),
+                        If(int_cnt == 16,
+                           NextValue(output_data, 0), # make sure it's zero
+                           NextState("Capture"),
+                        )
+                     ),
+        )
+                       
+        mdio_fsm.act("Capture",
+                     mdio_oe.eq(0),
+                     If(clk_div == 2,
+                        NextValue(rdata[15], mdio_i),
+                        NextValue(int_cnt, int_cnt - 1),
+                        If(int_cnt == 0,
+                           NextState("Idle"),
+                        ).Else(
+                            shift_rd.eq(1), # shift in 2 cycles to make room
+                        )
+                     ),
+        )
+        
+        led0 = platform.request("user_led", 0)
+        led1 = platform.request("user_led", 1)
+
+        self.comb += [
+            led0.eq(~mdio_fsm.ongoing("Idle")),
+            #led1.eq(clk_div != 0),
+        ]

nubus-to-ztex-gateware/nubus_to_fpga_soc.py

@@ -19,9 +19,6 @@ import nubus_to_fpga_export
 import nubus_full_unified
 import nubus_stat
 
-from litedram.modules import MT41J128M16
-from litedram.phy import s7ddrphy
-
 from litedram.frontend.dma import *
 
 from liteeth.phy.rmii import LiteEthPHYRMII
@@ -29,15 +26,11 @@ from liteeth.phy.rmii import LiteEthPHYRMII
 from migen.genlib.cdc import BusSynchronizer
 from migen.genlib.resetsync import AsyncResetSynchronizer
 
-from litex.soc.cores.video import VideoS7HDMIPHY
-from litex.soc.cores.video import VideoVGAPHY
-from litex.soc.cores.video import video_timings
-from VintageBusFPGA_Common.goblin_accel import *
-
 # Wishbone stuff
 from VintageBusFPGA_Common.cdc_wb import WishboneDomainCrossingMaster
 from VintageBusFPGA_Common.fpga_blk_dma import *
 from VintageBusFPGA_Common.fpga_sd_dma import *
+from VintageBusFPGA_Common.MacPeriphSoC import *
 
 from nubus_mem_wb import NuBus2Wishbone
 from nubus_memfifo_wb import NuBus2WishboneFIFO
@@ -182,35 +175,10 @@ class _CRG(Module):
                 
             
         
-class NuBusFPGA(SoCCore):    # Add SDCard -----------------------------------------------------------------------------------
+class NuBusFPGA(MacPeriphSoC):
-    # WiP
-    def add_sdcard_custom(self, name="sdcard", mode="read+write"):
-        # Imports.
-        from litesdcard.phy import SDPHY
-        from litesdcard.core import SDCore
-
-        # Checks.
-        assert mode in ["read", "write", "read+write"]
-
-        # Pads.
-        sdcard_pads = self.platform.request(name)
-
-        # Core.
-        self.check_if_exists("sdphy")
-        self.check_if_exists("sdcore")
-        self.sdphy  = SDPHY(sdcard_pads, self.platform.device, self.clk_freq, cmd_timeout=10e-1, data_timeout=10e-1)
-        self.sdcore = SDCore(self.sdphy)
-            
     def __init__(self, variant, version, sys_clk_freq, goblin, hdmi, goblin_res, sdcard, flash, config_flash, ethernet, **kwargs):
         print(f"Building NuBusFPGA for board version {version}")
         
-        kwargs["cpu_type"] = "None"
-        kwargs["integrated_sram_size"] = 0
-        kwargs["with_uart"] = False
-        kwargs["with_timer"] = False
-        
-        self.sys_clk_freq = sys_clk_freq
-    
         self.platform = platform = ztex213_nubus.Platform(variant = variant, version = version)
             
         if (flash and (version == "V1.2")):
@@ -220,69 +188,20 @@ class NuBusFPGA(SoCCore):    # Add SDCard --------------------------------------
             platform.add_extension(ztex213_nubus._rmii_eth_extpmod_io_v1_2)
 
         use_goblin_alt = True
-        if ((not use_goblin_alt) or (not hdmi)):
-            from VintageBusFPGA_Common.goblin_fb import goblin_rounded_size, Goblin
-        else:
-            from VintageBusFPGA_Common.goblin_alt_fb import goblin_rounded_size, GoblinAlt
-
-        if (goblin):
-            hres = int(goblin_res.split("@")[0].split("x")[0])
-            vres = int(goblin_res.split("@")[0].split("x")[1])
-            goblin_fb_size = goblin_rounded_size(hres, vres)
-            print(f"Reserving {goblin_fb_size} bytes ({goblin_fb_size//1048576} MiB) for the goblin")
-        else:
-            hres = 0
-            vres = 0
-            goblin_fb_size = 0
-            # litex.soc.cores.video.video_timings.update(goblin_timings)
         
-        SoCCore.__init__(self,
+        MacPeriphSoC.__init__(self,
-                         platform=platform,
+                              platform=platform,
-                         sys_clk_freq=sys_clk_freq,
+                              sys_clk_freq=sys_clk_freq,
-                         clk_freq=sys_clk_freq,
+                              csr_paging=0x800, #  default is 0x800
-                         csr_paging=0x800, #  default is 0x800
+                              bus_interconnect = "crossbar",
-                         bus_interconnect = "crossbar",
+                              goblin = goblin,
-                         **kwargs)
+                              hdmi = hdmi,
+                              goblin_res = goblin_res,
+                              use_goblin_alt = use_goblin_alt,
+                              **kwargs)
 
-        # Quoting the doc:
+        self.mem_map.update(self.wb_mem_map)
-        # * Separate address spaces are reserved for processor access to cards in NuBus slots. For a
+        
-        # * device in NuBus slot number s, the address space in 32-bit mode begins at address
-        # * $Fs00 0000 and continues through the highest address, $FsFF FFFF (where s is a constant in
-        # * the range $9 through $E for the Macintosh II, the Macintosh IIx, and the Macintosh IIfx;
-        # * $A through $E for the Macintosh Quadra 900; $9 through $B for the Macintosh IIcx;
-        # * $C through $E for the Macintosh IIci; $D and $E for the Macintosh Quadra 700; and
-        # * $9 for the Macintosh IIsi).
-        # the Q650 is $C through $E like the IIci, $E is the one with the PDS.
-        # So at best we get 16 MiB in 32-bits mode, unless using "super slot space"
-        # in 24 bits it's only one megabyte,  $s0 0000 through $sF FFFF
-        # they are translated: '$s0 0000-$sF FFFF' to '$Fs00 0000-$Fs0F FFFF' (for s in range $9 through $E)
-        # let's assume we have 32-bits mode, this can be requested in the DeclROM apparently
-        self.wb_mem_map = wb_mem_map = {
-            # master to map the NuBus access to RAM
-            "master":            0x00000000, # to 0x3FFFFFFF
-            "main_ram":          0x80000000, # not directly reachable from NuBus
-            "video_framebuffer": 0x80000000 + 0x10000000 - goblin_fb_size, # Updated later
-            # map everything in slot 0, remapped from the real slot in NuBus2Wishbone
-            "goblin_mem":        0xF0000000, # up to 8 MiB of FB memory
-            #"END OF FIRST MB" :  0xF00FFFFF,
-            #"END OF 8 MB":       0xF07FFFFF,
-            "goblin_bt" :        0xF0900000, # BT for goblin (regs)
-            "goblin_accel" :     0xF0901000, # accel for goblin (regs)
-            "goblin_accel_ram" : 0xF0902000, # accel for goblin (scratch ram)
-            "stat"             : 0xF0903000, # stat
-            "goblin_accel_rom" : 0xF0910000, # accel for goblin (rom)
-            "goblin_audio_ram" : 0xF0920000, # audio for goblin (RAM buffers)
-            "csr" :              0xF0A00000, # CSR
-            "pingmaster":        0xF0B00000,
-            "ethmac":            0xF0C00000,
-            #"spiflash":         0xF0D00000, # testing
-            #"config_spiflash":   0xF0D00000, # testing
-            "rom":               0xF0FF8000, # ROM at the end (32 KiB of it ATM)
-            "spiflash":          0xF0FF8000, # FIXME currently the flash is in the ROM spot, limited to 32 KiB
-            "config_spiflash":   0xF0FF8000, # FIXME currently the flash is in the ROM spot, limited to 32 KiB
-            #"END OF SLOT SPACE": 0xF0FFFFFF,
-        }
-        self.mem_map.update(wb_mem_map)
         self.submodules.crg = _CRG(platform=platform, version=version, sys_clk_freq=sys_clk_freq, goblin=goblin, hdmi=hdmi, pix_clk=litex.soc.cores.video.video_timings[goblin_res]["pix_clk"], ethernet=ethernet)
 
         ## add our custom timings after the clocks have been defined
@@ -302,84 +221,13 @@ class NuBusFPGA(SoCCore):    # Add SDCard --------------------------------------
                     #print(fix_line)
                     platform.add_platform_command(fix_line)
 
-        if ((not flash) and (not config_flash)): # so ROM is builtin
+        MacPeriphSoC.mac_add_declrom(self, version = version, flash = flash, config_flash = config_flash)
-            rom_file = "rom_{}.bin".format(version.replace(".", "_"))
+        
-            rom_data = soc_core.get_mem_data(filename_or_regions=rom_file, endianness="little") # "big"
+        MacPeriphSoC.mac_add_sdram(self, hwinit = False)
-            # rom = Array(rom_data)
+        
-            #print("\n****************************************\n")
-            #for i in range(len(rom)):
-            #    print(hex(rom[i]))
-            #print("\n****************************************\n")
-            self.add_ram("rom", origin=self.mem_map["rom"], size=2**15, contents=rom_data, mode="r") ## 32 KiB, must match mmap
-            print("$$$$$ ROM must be pre-existing for integration in the bitstream, double-check the ROM file is current for this configuration $$$$$\n");
-
-        if (flash):
-            from litespi.modules.generated_modules import W25Q128JV
-            from litespi.opcodes import SpiNorFlashOpCodes as Codes
-            self.add_spi_flash(mode="4x",
-                               clk_freq = sys_clk_freq/4, # Fixme; PHY freq ?
-                               module=W25Q128JV(Codes.READ_1_1_4),
-                               region_size = 0x00008000, # 32 KiB
-                               with_mmap=True, with_master=False)
-            print("$$$$$ ROM must be put in the external Flash NOR $$$$$\n");
-
-            
-        if (config_flash):
-            sector = 40
-            from litespi.modules.generated_modules import S25FL128S
-            from litespi.opcodes import SpiNorFlashOpCodes as Codes
-            self.add_spi_flash(name="config_spiflash",
-                               mode="1x",
-                               clk_freq = sys_clk_freq/4, # Fixme; PHY freq ?
-                               module=S25FL128S(Codes.READ_1_1_1),
-                               region_size = 0x00008000, # 32 KiB,
-                               region_offset = (sector * 65536),
-                               with_mmap=True, with_master=False)
-            print(f"$$$$$ ROM must be put in the config Flash at sector {sector} $$$$$\n");
-            
-        #from wb_test import WA2D
-        #self.submodules.wa2d = WA2D(self.platform)
-        #self.bus.add_slave("WA2D", self.wa2d.bus, SoCRegion(origin=0x00C00000, size=0x00400000, cached=False))
-
-        # notsimul to signify we're making a real bitstream
-        # notsimul == False only to produce a verilog implementation to simulate the bus side of things
-        notsimul = True
-        if (notsimul):
-            avail_sdram = 0
-            self.submodules.ddrphy = s7ddrphy.A7DDRPHY(platform.request("ddram"),
-                                                       memtype        = "DDR3",
-                                                       nphases        = 4,
-                                                       sys_clk_freq   = sys_clk_freq)
-            self.add_sdram("sdram",
-                           phy           = self.ddrphy,
-                           module        = MT41J128M16(sys_clk_freq, "1:4"),
-                           l2_cache_size = 0,
-            )
-            avail_sdram = self.bus.regions["main_ram"].size
-            #from sdram_init import DDR3FBInit
-            #self.submodules.sdram_init = DDR3FBInit(sys_clk_freq=sys_clk_freq, bitslip=1, delay=25)
-            #self.bus.add_master(name="DDR3Init", master=self.sdram_init.bus)
-        else:
-            avail_sdram = 256 * 1024 * 1024
-            self.add_ram("ram", origin=0x8f800000, size=2**16, mode="rw")
-
-        if (not notsimul): # otherwise we have no CSRs and litex doesn't like that
-            self.submodules.leds = ClockDomainsRenamer("nubus")(LedChaser(
-                pads         = platform.request_all("user_led"),
-                sys_clk_freq = 10e6))
-            self.add_csr("leds")
-
-        base_fb = self.wb_mem_map["main_ram"] + avail_sdram - 1048576 # placeholder
         if (goblin):
-            if (avail_sdram >= goblin_fb_size):
+            MacPeriphSoC.mac_add_goblin_prelim(self)
-                avail_sdram = avail_sdram - goblin_fb_size
+        
-                base_fb = self.wb_mem_map["main_ram"] + avail_sdram
-                self.wb_mem_map["video_framebuffer"] = base_fb
-                print(f"FrameBuffer base_fb @ {base_fb:x}")
-            else:
-                print("***** ERROR ***** Can't have a FrameBuffer without main ram\n")
-                assert(False)
-    
         # don't enable anything on the NuBus side for XX seconds after power up
         # this avoids FPGA initialization messing with the cold boot process
         # requires us to reset the Macintosh afterward so the FPGA board
@@ -491,7 +339,7 @@ class NuBusFPGA(SoCCore):    # Add SDCard --------------------------------------
                                                                 fromsbus_req_fifo=self.fromsbus_req_fifo,
                                                                 dram_native_r=self.sdram.crossbar.get_port(mode="read", data_width=data_width_bits),
                                                                 dram_native_w=self.sdram.crossbar.get_port(mode="write", data_width=data_width_bits),
-                                                                mem_size=avail_sdram//1048576,
+                                                                mem_size=self.avail_sdram//1048576,
                                                                 burst_size=burst_size,
                                                                 do_checksum = False,
                                                                 clock_domain="nubus")
@@ -530,45 +378,13 @@ class NuBusFPGA(SoCCore):    # Add SDCard --------------------------------------
             self.bus.add_slave("Stat", self.stat.bus_slv, SoCRegion(origin=self.mem_map.get("stat", None), size=0x1000, cached=False))
             
         if (goblin):
-            if (not hdmi):
+            MacPeriphSoC.mac_add_goblin(self, use_goblin_alt = use_goblin_alt, hdmi = hdmi, goblin_res = goblin_res, goblin_irq = fb_irq, audio_irq = audio_irq)
-                self.submodules.videophy = VideoVGAPHY(platform.request("vga"), clock_domain="vga")
-                self.submodules.goblin = Goblin(soc=self, phy=self.videophy, timings=goblin_res, clock_domain="vga", irq_line=fb_irq, endian="little", hwcursor=False, truecolor=True) # clock_domain for the VGA side, goblin is running in cd_sys
-            else:
-                if (not use_goblin_alt):
-                    self.submodules.videophy = VideoS7HDMIPHY(platform.request("hdmi"), clock_domain="hdmi")
-                    self.submodules.goblin = Goblin(soc=self, phy=self.videophy, timings=goblin_res, clock_domain="hdmi", irq_line=fb_irq, endian="little", hwcursor=False, truecolor=True) # clock_domain for the HDMI side, goblin is running in cd_sys
-                else:
-                    # GoblinAlt contains its own PHY
-                    self.submodules.goblin = GoblinAlt(soc=self, timings=goblin_res, clock_domain="hdmi", irq_line=fb_irq, endian="little", hwcursor=False, truecolor=True)
-                    # it also has a bus master so that the audio bit can fetch data from Wishbone
-                    self.bus.add_master(name="GoblinAudio", master=self.goblin.goblin_audio.busmaster)
-                    self.add_ram("goblin_audio_ram", origin=self.mem_map["goblin_audio_ram"], size=2**13, mode="rw") # 8 KiB buffer, planned as 2*4KiB
-                    self.comb += [ audio_irq.eq(self.goblin.goblin_audio.irq), ]
-                    
-            self.bus.add_slave("goblin_bt", self.goblin.bus, SoCRegion(origin=self.mem_map.get("goblin_bt", None), size=0x1000, cached=False))
-            #pad_user_led_0 = platform.request("user_led", 0)
-            #pad_user_led_1 = platform.request("user_led", 1)
-            #self.comb += pad_user_led_0.eq(self.goblin.video_framebuffer.underflow)
-            #self.comb += pad_user_led_1.eq(self.goblin.video_framebuffer.fb_dma.enable)
-            if (True):
-                self.submodules.goblin_accel = GoblinAccelNuBus(soc = self)
-                self.bus.add_slave("goblin_accel", self.goblin_accel.bus, SoCRegion(origin=self.mem_map.get("goblin_accel", None), size=0x1000, cached=False))
-                self.bus.add_master(name="goblin_accel_r5_i", master=self.goblin_accel.ibus)
-                self.bus.add_master(name="goblin_accel_r5_d", master=self.goblin_accel.dbus)
-                goblin_rom_file = "VintageBusFPGA_Common/blit_goblin_nubus.raw"
-                goblin_rom_data = soc_core.get_mem_data(filename_or_regions=goblin_rom_file, endianness="little")
-                goblin_rom_len = 4*len(goblin_rom_data);
-                rounded_goblin_rom_len = 2**log2_int(goblin_rom_len, False)
-                print(f"GOBLIN ROM is {goblin_rom_len} bytes, using {rounded_goblin_rom_len}")
-                assert(rounded_goblin_rom_len <= 2**16)
-                self.add_ram("goblin_accel_rom", origin=self.mem_map["goblin_accel_rom"], size=rounded_goblin_rom_len, contents=goblin_rom_data, mode="r")
-                self.add_ram("goblin_accel_ram", origin=self.mem_map["goblin_accel_ram"], size=2**12, mode="rw")
 
         if (sdcard):
             self.add_sdcard()
             # irq?
         
-        if (ethernet):
+        if (ethernet): ### WIP WIP WIP WIP
             # we need the CRG to provide the cd_eth clock: "use refclk_cd as RMII reference clock (provided by user design) (no external clock).
             self.ethphy = LiteEthPHYRMII(
                 clock_pads = self.platform.request("eth_clocks"),
@@ -576,6 +392,10 @@ class NuBusFPGA(SoCCore):    # Add SDCard --------------------------------------
             self.add_ethernet(phy=self.ethphy, data_width = 32)
             print(f"%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% {self.ethmac.interface.sram.ev.irq}") # FIXME HANDLEME
 
+            from mdio import MDIOCtrl
+            self.submodules.mdio_ctrl = MDIOCtrl(platform=platform)
+
+
         # for testing
         if (False):
             from nubus_master_tst import PingMaster