efinix: RGMII phy should be operational (no tested)

PLL infrastructure should be complete now.
We can also use DDIO input and outputs.
However, there is problem (bug) during P&R:

ERROR(1): [Line 52] Block auto_eth_tx_delayed_clk is
an output pad but sub-block 1 is not an output pad location.

Inderface Designer validation doesn't report any problem.
I have a test project with the same configuration (I compared
the reports for blocks configuration) and it works.

litex/build/efinix/ifacewriter.py

@@ -180,12 +180,67 @@ design.create('{2}', '{3}', './../gateware', overwrite=True)
                 return b
         return None
 
+    def generate_gpio(self, block, verbose=True):
+        name = block['name']
+        mode = block['mode']
+        cmd = ''
+
+
+# TODO: {'type': 'GPIO', 'mode': 'OUTPUT', 'location': 'U16', 'size': 4, 'in_reg': 'DDIO_RESYNC', 'out_clk_pin': '', 'is_inclk_inverted': False, 'name': 'auto_ethtx_tx_data_d1', 'name_d2': 'auto_ethtx_tx_data_d2'}
+
+        if mode == 'INPUT':
+            if len(block['location']) == 1:
+                cmd += 'design.create_input_gpio("{}")\n'.format(name)
+                cmd += 'design.assign_pkg_pin("{}","{}")\n'.format(name, block['location'][0])
+            else:
+                cmd += 'design.create_input_gpio("{}",{},0)\n'.format(name, block['size']-1)
+                for i, pad in enumerate(block['location']):
+                    cmd += 'design.assign_pkg_pin("{}[{}]","{}")\n'.format(name, i, pad)
+            if 'in_reg' in block:
+                cmd += 'design.set_property("{}","IN_REG","{}")\n'.format(name, block['in_reg'])
+                cmd += 'design.set_property("{}","IN_CLK_PIN","{}")\n\n'.format(name, block['in_clk_pin'])
+            return cmd
+
+        if mode == 'OUTPUT':
+            if len(block['location']) == 1:
+                cmd += 'design.create_output_gpio("{}")\n'.format(name)
+                cmd += 'design.assign_pkg_pin("{}","{}")\n'.format(name, block['location'][0])
+            else:
+                cmd += 'design.create_input_gpio("{}",{},0)\n'.format(name, block['size']-1)
+                for i, pad in enumerate(block['location']):
+                    cmd += 'design.assign_pkg_pin("{}[{}]","{}")\n'.format(name, i, pad)
+            if 'out_reg' in block:
+                cmd += 'design.set_property("{}","OUT_REG","{}")\n'.format(name, block['out_reg'])
+                cmd += 'design.set_property("{}","OUT_CLK_PIN","{}")\n\n'.format(name, block['out_clk_pin'])
+            return cmd
+
+        if mode == 'INPUT_CLK':
+            cmd += 'design.create_input_clock_gpio("{}")\n'.format(name)
+            cmd += 'design.set_property("{}","IN_PIN","{}")\n'.format(name, name)
+            cmd += 'design.assign_pkg_pin("{}","{}")\n\n'.format(name, block['location'])
+            return cmd
+
+        if mode == 'OUTPUT_CLK':
+            cmd += 'design.create_clockout_gpio("{}")\n'.format(name)
+            cmd += 'design.set_property("{}","OUT_CLK_PIN","{}")\n'.format(name, name)
+            cmd += 'design.assign_pkg_pin("{}","{}")\n\n'.format(name, block['location'])
+            return cmd
+
+        cmd = '# TODO: ' + str(block) +'\n'
+        return cmd
+
     def generate_pll(self, block, verbose=True):
         name = block['name']
         cmd = '# ---------- PLL {} ---------\n'.format(name)
         cmd += 'design.create_block("{}", block_type="PLL")\n'.format(name)
+        cmd += 'pll_config = {{ "REFCLK_FREQ":"{}" }}\n'.format(block['input_freq'] / 1e6)
+
+        if block['input_clock'] == 'EXTERNAL':
             cmd += 'design.gen_pll_ref_clock("{}", pll_res="{}", refclk_src="{}", refclk_name="{}", ext_refclk_no="{}")\n\n' \
                 .format(name, block['resource'], block['input_clock'], block['input_clock_name'], block['clock_no'])
+        else:
+            cmd += 'design.gen_pll_ref_clock("{}", pll_res="{}", refclk_name="{}", refclk_src="CORE")\n'.format(name, block['resource'], block['input_signal'])
+            cmd += 'design.set_property("{}", "CORE_CLK_PIN", "{}", block_type="PLL")\n\n'.format(name, block['input_signal'])
 
             cmd += 'pll_config = {{ "REFCLK_FREQ":"{}" }}\n'.format(block['input_freq'] / 1e6)
             cmd += 'design.set_property("{}", pll_config, block_type="PLL")\n\n'.format(name)
@@ -198,9 +253,9 @@ design.create('{2}', '{3}', './../gateware', overwrite=True)
         for i, clock in enumerate(block['clk_out']):
             if i > 0:
                 cmd += 'pll_config = {{ "CLKOUT{}_EN":"1", "CLKOUT{}_PIN":"{}" }}\n'.format(i, i, clock[0])
-                cmd += 'design.set_property("{}", pll_config, block_type="PLL")\n\n'.format(name)
             else:
                 cmd += 'pll_config = {{ "CLKOUT{}_PIN":"{}" }}\n'.format(i, clock[0])
+
             cmd += 'design.set_property("{}", pll_config, block_type="PLL")\n\n'.format(name)
 
         cmd += 'target_freq = {\n'
@@ -215,8 +270,8 @@ design.create('{2}', '{3}', './../gateware', overwrite=True)
             cmd += 'print("#### {} ####")\n'.format(name)
             cmd += 'clksrc_info = design.trace_ref_clock("{}", block_type="PLL")\n'.format(name)
             cmd += 'pprint.pprint(clksrc_info)\n'
-            cmd += 'clock_source_prop = ["REFCLK_SOURCE", "EXT_CLK", "CLKOUT0_EN", "CLKOUT1_EN","REFCLK_FREQ", "RESOURCE"]\n'
-            cmd += 'clock_source_prop += ["M", "N", "O", "CLKOUT0_DIV", "CLKOUT2_DIV", "VCO_FREQ", "PLL_FREQ"]\n'
+            cmd += 'clock_source_prop = ["REFCLK_SOURCE", "CORE_CLK_PIN", "EXT_CLK", "CLKOUT0_EN", "CLKOUT1_EN","REFCLK_FREQ", "RESOURCE"]\n'
+            cmd += 'clock_source_prop += ["CLKOUT0_FREQ", "CLKOUT1_FREQ", "CLKOUT2_FREQ"]\n'
             cmd += 'prop_map = design.get_property("{}", clock_source_prop, block_type="PLL")\n'.format(name)
             cmd += 'pprint.pprint(prop_map)\n'
 
@@ -228,6 +283,9 @@ design.create('{2}', '{3}', './../gateware', overwrite=True)
         for b in self.blocks:
             if b['type'] == 'PLL':
                 output += self.generate_pll(b)
+            if b['type'] == 'GPIO':
+                output += self.generate_gpio(b)
+
         return output
 
     def footer(self):

litex/build/efinix/platform.py

@@ -18,6 +18,9 @@ class EfinixPlatform(GenericPlatform):
     def __init__(self, *args, toolchain="efinity", **kwargs):
         GenericPlatform.__init__(self, *args, **kwargs)
 
+        self.pll_available = ['PLL_TL0', 'PLL_TR0', 'PLL_TR1', 'PLL_TR2', 'PLL_TR3', 'PLL_BR0', 'PLL_BR1', 'PLL_BR2', 'PLL_BL0']
+        self.pll_used = []
+
         if 'LITEX_ENV_EFINITY' in os.environ:
             self.efinity_path = os.environ['LITEX_ENV_EFINITY'].rstrip('/')
             os.environ['EFINITY_HOME'] = self.efinity_path
@@ -55,29 +58,63 @@ class EfinixPlatform(GenericPlatform):
     # get_pin_location(p[1])
     # not tested with subsignal like get_pin_location(p.clk)
     def get_pin_location(self, sig):
+        if sig is None:
+            return None
         sc = self.constraint_manager.get_sig_constraints()
         for s, pins, others, resource in sc:
-            if s == sig:
-                return pins[0]
+            if (s == sig) and (pins[0] != 'X'):
+                    return pins
         return None
 
     def get_pin_name(self, sig):
+        if sig is None:
+            return None
         sc = self.constraint_manager.get_sig_constraints()
         for s, pins, others, resource in sc:
             if s == sig:
+                if resource[2]:
+                    return resource[0] + '_' + resource[2]
+                else:
                     return resource[0]
         return None
 
-    def add_iface_io(self, name, size=1):
+    def get_sig_constraint(self, sig):
+        sc = self.constraint_manager.get_sig_constraints()
+        for s, pins, others, resource in sc:
+            if s == sig:
+                return sc
+        return None
+
+    def add_iface_io(self, name, size=1, append=True):
         self.add_extension([(name, 0, Pins(size))])
         tmp = self.request(name)
         # We don't want this IO to be in the interface configuration file as a simple GPIO
+        if append:
             self.toolchain.specials_gpios.append(tmp)
         return tmp
 
-    def add_iface_ios(self, io):
+    def add_iface_ios(self, io, append=True):
         self.add_extension(io)
         tmp = self.request(io[0][0])
+        if append:
             for s in tmp.flatten():
                 self.toolchain.specials_gpios.append(s)
         return tmp
+
+    def del_record_signal(self, record, sig):
+            for pos, (name, item) in enumerate(vars(record).items()):
+                    if isinstance(item, Signal):
+                            if item == sig:
+                                    # Two first pos are name and layout
+                                    del record.layout[pos-2]
+                                    delattr(record, name)
+                                    break
+
+    def get_pll_resource(self, name):
+        self.pll_used.append(name)
+        self.pll_available.remove(name)
+        print('Pll used         : ' + str(self.pll_used))
+        print('Pll pll_available: ' + str(self.pll_available))
+
+    def get_free_pll_resource(self):
+        return self.pll_available[0]

litex/build/efinix/rgmii.py

@@ -0,0 +1,194 @@
+#
+# This file is part of LiteEth.
+#
+# Copyright (c) 2015-2020 Florent Kermarrec <florent@enjoy-digital.fr>
+# SPDX-License-Identifier: BSD-2-Clause
+
+# RGMII PHY for 7-Series Xilinx FPGA
+
+from migen import *
+from migen.genlib.resetsync import AsyncResetSynchronizer
+
+from litex.build.generic_platform import *
+from litex.soc.cores.clock import *
+
+from liteeth.common import *
+from liteeth.phy.common import *
+
+
+class LiteEthPHYRGMIITX(Module):
+    def __init__(self, platform, pads):
+        self.sink = sink = stream.Endpoint(eth_phy_description(8))
+
+        # # #
+
+        name = platform.get_pin_name(pads.tx_data)
+        pad = platform.get_pin_location(pads.tx_data)
+        name = 'auto_' + name
+        tx_data_d1 = []
+        tx_data_d2 = []
+        # This a workaround, we could use signals with 4 bits but there is
+        # a problem with the Python API that prevents it
+
+        #tx_data_d1 = platform.add_iface_io(name + '_HI', 4)
+        #tx_data_d2 = platform.add_iface_io(name + '_LO', 4)
+
+        for i in range(4):
+                tx_data_d1.append(platform.add_iface_io(name + str(i) + '_HI'))
+                tx_data_d2.append(platform.add_iface_io(name + str(i) + '_LO'))
+
+                block = {'type':'GPIO',
+                        'mode':'OUTPUT',
+                        'name':name + str(i),
+                       #'name':name,
+                        'location':[pad[i]],
+                        'size':1,
+                       #'location':pad,
+                       #'size':4,
+                        'out_reg':'DDIO_RESYNC',
+                        'out_clk_pin':'auto_eth_tx_clk', # -------------------------- TODO
+                        'is_inclk_inverted':False
+                }
+                platform.toolchain.ifacewriter.blocks.append(block)
+
+        platform.del_record_signal(pads, pads.tx_data)
+
+        #self.comb += pads.tx_ctl.eq(sink.valid)
+        #self.comb += tx_data_d1.eq(sink.data[0:4])
+        #self.comb += tx_data_d2.eq(sink.data[4:8])
+        #self.comb += sink.ready.eq(1)
+
+        self.comb += [ pads.tx_ctl.eq(sink.valid),
+                       tx_data_d1[0].eq(sink.data[0]),
+                       tx_data_d1[1].eq(sink.data[1]),
+                       tx_data_d1[2].eq(sink.data[2]),
+                       tx_data_d1[3].eq(sink.data[3]),
+                       tx_data_d2[0].eq(sink.data[4]),
+                       tx_data_d2[1].eq(sink.data[5]),
+                       tx_data_d2[2].eq(sink.data[6]),
+                       tx_data_d2[3].eq(sink.data[7]),
+                       sink.ready.eq(1),
+        ]
+
+class LiteEthPHYRGMIIRX(Module):
+    def __init__(self, platform, pads):
+        self.source = source = stream.Endpoint(eth_phy_description(8))
+
+        # # #
+
+        rx_ctl_d = Signal()
+        rx_data = Signal(8)
+
+        # pads.rx_ctl can't be connected to a special GPIO (DDIO) because
+        # of this board layout.
+
+        # Add a DDIO_RESYNC input block with 'auto_eth_rx_clk' as clock
+        name = platform.get_pin_name(pads.rx_data)
+        pad = platform.get_pin_location(pads.rx_data)
+        name = 'auto_' + name
+        rx_data_d1 = []
+        rx_data_d2 = []
+        # This a workaround, we could use signals with 4 bits but there is
+        # a problem with the Python API that prevents it
+        for i in range(4):
+            rx_data_d1.append(platform.add_iface_io(name + str(i) + '_HI'))
+            rx_data_d2.append(platform.add_iface_io(name + str(i) + '_LO'))
+
+            block = {'type':'GPIO',
+                    'mode':'INPUT',
+                    'name':name + str(i),
+                    'location':[pad[i]],
+                    'size':1,
+                    'in_reg':'DDIO_RESYNC',
+                    'in_clk_pin':'auto_eth_rx_clk',
+                    'is_inclk_inverted':False
+            }
+            platform.toolchain.ifacewriter.blocks.append(block)
+
+        platform.del_record_signal(pads, pads.rx_data)
+
+        self.comb += rx_data.eq(Cat(rx_data_d1[0], rx_data_d1[1], rx_data_d1[2], rx_data_d1[3],
+                                    rx_data_d2[0], rx_data_d2[1], rx_data_d2[2], rx_data_d2[3]))
+
+        self.sync += rx_ctl_d.eq(pads.rx_ctl)
+
+        last = Signal()
+        self.comb += last.eq(~pads.rx_ctl & rx_ctl_d)
+        self.sync += [
+            source.valid.eq(pads.rx_ctl),
+            source.data.eq(rx_data)
+        ]
+        self.comb += source.last.eq(last)
+
+class LiteEthPHYRGMIICRG(Module, AutoCSR):
+    def __init__(self, platform, clock_pads, with_hw_init_reset, tx_delay=2e-9, hw_reset_cycles=256):
+        self._reset = CSRStorage()
+
+        # # #
+
+        # Clocks
+
+        self.clock_domains.cd_eth_rx         = ClockDomain()
+        self.clock_domains.cd_eth_tx         = ClockDomain()
+        self.clock_domains.cd_eth_tx_delayed = ClockDomain(reset_less=True)
+
+        # Add a GPIO block with clock input property
+        # Add a input 'auto_eth_rx_clk' to the top.v 
+        clkrx = platform.add_iface_io('auto_eth_rx_clk')
+        block = {'type':'GPIO',
+                 'size':1,
+                 # Get the location from the original resource
+                 'location': platform.get_pin_location(clock_pads.rx)[0],
+                 'name':platform.get_pin_name(clkrx),
+                 'mode':'INPUT_CLK'
+        }
+        platform.toolchain.ifacewriter.blocks.append(block)
+        self.comb += self.cd_eth_rx.clk.eq(clkrx)
+
+        clktx = platform.add_iface_io('auto_eth_tx_delayed_clk')
+        block = {'type':'GPIO',
+                 'size':1,
+                 # Get the location from the original resource
+                 'location': platform.get_pin_location(clock_pads.tx)[0],
+                 'name':platform.get_pin_name(clktx),
+                 'mode':'OUTPUT_CLK'
+        }
+        platform.toolchain.ifacewriter.blocks.append(block)
+        self.comb += clktx.eq(self.cd_eth_tx.clk)
+
+        self.submodules.pll = pll = TRIONPLL(platform)
+        # Internal clock must come from a named signal
+        pll.register_clkin(None, 125e6, name='auto_eth_rx_clk')
+        pll.create_clkout(None,  125e6, phase=90, name='auto_eth_tx_delayed_clk')
+        pll.create_clkout(None,  125e6, name='auto_eth_tx_clk')
+
+        platform.delete(clock_pads)
+
+        ## Reset
+        #self.reset = reset = Signal()
+        #if with_hw_init_reset:
+        #    self.submodules.hw_reset = LiteEthPHYHWReset(cycles=hw_reset_cycles)
+        #    self.comb += reset.eq(self._reset.storage | self.hw_reset.reset)
+        #else:
+        #    self.comb += reset.eq(self._reset.storage)
+        #if hasattr(clock_pads, "rst_n"):
+        #    self.comb += clock_pads.rst_n.eq(~reset)
+        #self.specials += [
+        #    AsyncResetSynchronizer(self.cd_eth_tx, reset),
+        #    AsyncResetSynchronizer(self.cd_eth_rx, reset),
+        #]
+
+
+class LiteEthPHYRGMII(Module, AutoCSR):
+    dw          = 8
+    tx_clk_freq = 125e6
+    rx_clk_freq = 125e6
+    def __init__(self, platform, clock_pads, pads, with_hw_init_reset=True, tx_delay=2e-9, rx_delay=2e-9,
+            iodelay_clk_freq=200e6, hw_reset_cycles=256):
+        self.submodules.crg = LiteEthPHYRGMIICRG(platform, clock_pads, with_hw_init_reset, tx_delay, hw_reset_cycles)
+        self.submodules.tx  = ClockDomainsRenamer("eth_tx")(LiteEthPHYRGMIITX(platform, pads))
+        self.submodules.rx  = ClockDomainsRenamer("eth_rx")(LiteEthPHYRGMIIRX(platform, pads))
+        self.sink, self.source = self.tx.sink, self.rx.source
+
+        #if hasattr(pads, "mdc"):
+        #    self.submodules.mdio = LiteEthPHYMDIO(pads)

litex/build/generic_platform.py

@@ -192,6 +192,12 @@ class ConstraintManager:
 
     def delete(self, signal):
         for res, obj in self.matched:
+            if isinstance(signal, Record):
+                if isinstance(obj, Signal):
+                    continue
+            else:
+                if isinstance(obj, Record):
+                    continue
             if obj == signal:
                 self.matched.remove((res, obj))
 
@@ -280,6 +286,8 @@ class ConstraintManager:
             if has_subsignals:
                 for element in resource[2:]:
                     if isinstance(element, Subsignal):
+                        # Because we could have removed one Signal From the record
+                        if hasattr(obj, element.name):
                             sig = getattr(obj, element.name)
                             pins, others = _separate_pins(top_constraints +
                                                         element.constraints)

litex/soc/cores/clock/efinix_trion.py

@@ -53,15 +53,15 @@ class TRIONPLL(Module):
 
         self.platform.toolchain.ifacewriter.blocks.append(block)
 
-    def register_clkin(self, clkin, freq):
+    def register_clkin(self, clkin, freq, name= ''):
         block = self.platform.toolchain.ifacewriter.get_block(self.pll_name)
 
-        # If clkin has resource, PLL clock input is EXTERNAL
-        # When PLL clock is external, it must not be present in the top file
-        # Add a test on clkin resource here
         block['input_clock_name'] = self.platform.get_pin_name(clkin)
-        pin_name = self.platform.get_pin_location(clkin)
 
+        # If clkin has a pin number, PLL clock input is EXTERNAL
+        if self.platform.get_pin_location(clkin):
+           
+            pad_name = self.platform.get_pin_location(clkin)
             self.platform.delete(clkin)
 
             #tpl = "create_clock -name {clk} -period {period} [get_ports {{{clk}}}]"
@@ -69,17 +69,28 @@ class TRIONPLL(Module):
             #sdc.append(tpl.format(clk=block['input_clock_name'], period=1/freq))
 
             parser = EfinixDbParser(self.platform.efinity_path, self.platform.device)
-        (pll_res, clock_no) = parser.get_pll_inst_from_pin(pin_name)
+            try:
+                (pll_res, clock_no) = parser.get_pll_inst_from_pin(pad_name)
+            except:
+                self.logger.error("Cannot find a pll with {} as input".format(pad_name))
+                quit()
 
             block['input_clock'] = 'EXTERNAL'
-        block['input_freq'] = freq
             block['resource'] = pll_res
             block['clock_no'] = clock_no
-
-        self.logger.info("Using {}".format(pll_res))
             self.logger.info("Clock source: {}, using EXT_CLK{}".format(block['input_clock'], clock_no))
+            self.platform.get_pll_resource(pll_res)
+        else:
+            block['input_clock'] = 'INTERNAL'
+            block['resource'] = self.platform.get_free_pll_resource()
+            block['input_signal'] = name
+            self.logger.info("Clock source: {}".format(block['input_clock']))
 
-    def create_clkout(self, cd, freq, phase=0, margin=1e-2, name='', with_reset=False, user_clk=True):
+        block['input_freq'] = freq
+
+        self.logger.info("Using {}".format(block['resource']))
+
+    def create_clkout(self, cd, freq, phase=0, margin=1e-2, name='', with_reset=False):
         assert self.nclkouts < self.nclkouts_max
 
         if name != '':
@@ -87,7 +98,7 @@ class TRIONPLL(Module):
         else:
             clk_out_name = '{}_CLKOUT{}'.format(self.pll_name, self.nclkouts)
 
-        if user_clk == True:
+        if cd != None:
             self.platform.add_extension([(clk_out_name, 0, Pins(1))])
             tmp = self.platform.request(clk_out_name)