versa_ecp5: Add --eth-phy to select ethernet phy

This also simplifies the logic a bit.

litex_boards/targets/versa_ecp5.py

@@ -78,7 +78,7 @@ class _CRG(Module):
 # BaseSoC ------------------------------------------------------------------------------------------
 
 class BaseSoC(SoCCore):
-    def __init__(self, sys_clk_freq=int(75e6), device="LFE5UM5G", with_ethernet=False, with_etherbone=False, toolchain="trellis", **kwargs):
+    def __init__(self, sys_clk_freq=int(75e6), device="LFE5UM5G", with_ethernet=False, with_etherbone=False, eth_phy=0, toolchain="trellis", **kwargs):
         platform = versa_ecp5.Platform(toolchain=toolchain, device=device)
 
         # FIXME: adapt integrated rom size for Microwatt
@@ -112,21 +112,16 @@ class BaseSoC(SoCCore):
                 l2_cache_reverse        = True
             )
 
-        # Ethernet ---------------------------------------------------------------------------------
-        if with_ethernet:
+        # Ethernet / Etherbone ---------------------------------------------------------------------
+        if with_ethernet or with_etherbone:
             self.submodules.ethphy = LiteEthPHYRGMII(
-                clock_pads = self.platform.request("eth_clocks"),
-                pads       = self.platform.request("eth"))
+                clock_pads = self.platform.request("eth_clocks", eth_phy),
+                pads       = self.platform.request("eth", eth_phy))
             self.add_csr("ethphy")
-            self.add_ethernet(phy=self.ethphy)
-
-        # Etherbone --------------------------------------------------------------------------------
-        if with_etherbone:
-            self.submodules.ethphy = LiteEthPHYRGMII(
-                clock_pads = self.platform.request("eth_clocks"),
-                pads       = self.platform.request("eth"))
-            self.add_csr("ethphy")
-            self.add_etherbone(phy=self.ethphy)
+            if with_ethernet:
+                self.add_ethernet(phy=self.ethphy)
+            if with_etherbone:
+                self.add_etherbone(phy=self.ethphy)
 
         # Leds -------------------------------------------------------------------------------------
         self.submodules.leds = LedChaser(
@@ -148,6 +143,7 @@ def main():
     parser.add_argument("--device",         default="LFE5UM5G",  help="ECP5 device (LFE5UM5G (default) or LFE5UM)")
     parser.add_argument("--with-ethernet",  action="store_true", help="Enable Ethernet support")
     parser.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support")
+    parser.add_argument("--eth-phy",        default=0, type=int, help="Ethernet PHY 0 or 1 (default=0)")
     args = parser.parse_args()
 
     assert not (args.with_ethernet and args.with_etherbone)
@@ -155,6 +151,7 @@ def main():
         device         = args.device,
         with_ethernet  = args.with_ethernet,
         with_etherbone = args.with_etherbone,
+        eth_phy        = args.eth_phy,
         toolchain      = args.toolchain,
         **soc_sdram_argdict(args))
     builder = Builder(soc, **builder_argdict(args))