xilinx_zc706: Add Ethernet/Etherbone support through SFP/K7_1000BaseX…

… (Untested on hardware).

litex_boards/targets/xilinx_zc706.py

@@ -30,6 +30,8 @@
 from litex.soc.integration.builder import *
 from litex.soc.cores.led import LedChaser
 
+from liteeth.phy.k7_1000basex import K7_1000BASEX
+
 from litepcie.phy.s7pciephy import S7PCIEPHY
 from litepcie.software import generate_litepcie_software
 
@@ -39,6 +41,7 @@ class _CRG(LiteXModule):
     def __init__(self, platform, sys_clk_freq):
         self.rst    = Signal()
         self.cd_sys = ClockDomain()
+        self.cd_eth = ClockDomain()
 
         # # #
 
@@ -50,12 +53,21 @@ def __init__(self, platform, sys_clk_freq):
         self.comb += pll.reset.eq(self.rst)
         pll.register_clkin(clk200, 200e6)
         pll.create_clkout(self.cd_sys, sys_clk_freq)
+        pll.create_clkout(self.cd_eth, 200e6)
         platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst.
 
 # BaseSoC ------------------------------------------------------------------------------------------
 
 class BaseSoC(SoCCore):
-    def __init__(self, sys_clk_freq=100e6, with_led_chaser=True, with_pcie=False, **kwargs):
+    def __init__(self, sys_clk_freq=125e6,
+        with_ethernet   = False,
+        with_etherbone  = False,
+        eth_ip          = "192.168.1.50",
+        remote_ip       = None,
+        eth_dynamic_ip  = False,
+        with_led_chaser = True,
+        with_pcie       = False,
+        **kwargs):
         platform = xilinx_zc706.Platform()
         kwargs["uart_name"]     = "crossover"
         kwargs["with_jtagbone"] = True
@@ -66,6 +78,21 @@ def __init__(self, sys_clk_freq=100e6, with_led_chaser=True, with_pcie=False, **
         # SoCCore ----------------------------------------------------------------------------------
         SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on ZCU706", **kwargs)
 
+        # Ethernet / Etherbone ---------------------------------------------------------------------
+        if with_ethernet or with_etherbone:
+            self.ethphy = K7_1000BASEX(
+                refclk_or_clk_pads = self.crg.cd_eth.clk,
+                data_pads          = self.platform.request("sfp", 0),
+                sys_clk_freq       = self.clk_freq,
+                with_csr           = False
+            )
+            self.comb += self.platform.request("sfp_tx_disable_n", 0).eq(1)
+            platform.add_platform_command("set_property SEVERITY {{Warning}} [get_drc_checks REQP-52]")
+            if with_etherbone:
+                self.add_etherbone(phy=self.ethphy, ip_address=eth_ip, with_ethmac=with_ethernet)
+            elif with_ethernet:
+                self.add_ethernet(phy=self.ethphy, dynamic_ip=eth_dynamic_ip, local_ip=eth_ip, remote_ip=remote_ip)
+
         # PCIe -------------------------------------------------------------------------------------
         if with_pcie:
             self.pcie_phy = S7PCIEPHY(platform, platform.request("pcie_x4"),
@@ -84,14 +111,24 @@ def __init__(self, sys_clk_freq=100e6, with_led_chaser=True, with_pcie=False, **
 def main():
     from litex.build.parser import LiteXArgumentParser
     parser = LiteXArgumentParser(platform=xilinx_zc706.Platform, description="LiteX SoC on ZC706.")
-    parser.add_target_argument("--sys-clk-freq", default=100e6, type=float, help="System clock frequency.")
-    parser.add_target_argument("--with-pcie",    action="store_true",       help="Enable PCIe support.")
-    parser.add_target_argument("--driver",       action="store_true",       help="Generate PCIe driver.")
+    parser.add_target_argument("--sys-clk-freq",   default=125e6, type=float, help="System clock frequency.")
+    parser.add_target_argument("--with-ethernet",  action="store_true",       help="Enable Ethernet support.")
+    parser.add_target_argument("--with-etherbone", action="store_true",       help="Enable Etherbone support.")
+    parser.add_target_argument("--eth-ip",         default="192.168.1.50",    help="Ethernet/Etherbone IP address.")
+    parser.add_target_argument("--remote-ip",      default="192.168.1.100",   help="Remote IP address of TFTP server.")
+    parser.add_target_argument("--eth-dynamic-ip", action="store_true",       help="Enable dynamic Ethernet IP addresses setting.")
+    parser.add_target_argument("--with-pcie",      action="store_true",       help="Enable PCIe support.")
+    parser.add_target_argument("--driver",         action="store_true",       help="Generate PCIe driver.")
     args = parser.parse_args()
 
     soc = BaseSoC(
-        sys_clk_freq = args.sys_clk_freq,
-        with_pcie    = args.with_pcie,
+        sys_clk_freq   = args.sys_clk_freq,
+        with_ethernet  = args.with_ethernet,
+        with_etherbone = args.with_etherbone,
+        eth_ip         = args.eth_ip,
+        remote_ip      = args.remote_ip,
+        eth_dynamic_ip = args.eth_dynamic_ip,
+        with_pcie      = args.with_pcie,
         **parser.soc_argdict
     )
     builder = Builder(soc, **parser.builder_argdict)