liteeth_gen: Add refclk_freq parameter for SGMII/1000BaseX.

examples/udp_usp_gth_sgmii.yml

@@ -5,14 +5,15 @@
 # SPDX-License-Identifier: BSD-2-Clause
 
 # PHY ----------------------------------------------------------------------
-phy:          USP_GTH_1000BASEX
-vendor:       xilinx
-toolchain:    vivado
+phy       : USP_GTH_1000BASEX
+vendor    : xilinx
+toolchain : vivado
 
 # Core ---------------------------------------------------------------------
-clk_freq:    125e6
-core:        udp
-data_width:  32
+refclk_freq : 156.25e6
+clk_freq    : 25e6
+core        : udp
+data_width  : 32
 
 # UDP Ports --------------------------------------------------------------------
 udp_ports:   {

liteeth/gen.py

@@ -134,7 +134,7 @@
 
     # SGMII PHY Pads
     ("sgmii", 0,
-        Subsignal("refclk200", Pins(1)),
+        Subsignal("refclk", Pins(1)),
         Subsignal("txp",    Pins(1)),
         Subsignal("txn",    Pins(1)),
         Subsignal("rxp",    Pins(1)),
@@ -241,9 +241,10 @@ def __init__(self, platform, core_config):
         ]:
             ethphy_pads = platform.request("sgmii")
             ethphy = phy(
-                refclk_or_clk_pads = ethphy_pads.refclk200,
+                refclk_or_clk_pads = ethphy_pads.refclk,
                 data_pads          = ethphy_pads,
                 sys_clk_freq       = self.clk_freq,
+                refclk_freq        = core_config.get("refclk_freq", 200e6),
                 with_csr           = False,
                 rx_polarity        = 0, # Add support to liteeth_gen if useful.
                 tx_polarity        = 0, # Add support to liteeth_gen if useful.
@@ -438,7 +439,7 @@ def main():
                 core_config[k] = replaces[r]
         if k == "phy":
             core_config[k] = getattr(liteeth_phys, core_config[k])
-        if k in ["clk_freq"]:
+        if k in ["refclk_freq", "clk_freq"]:
             core_config[k] = int(float(core_config[k]))
         if k in ["phy_tx_delay", "phy_rx_delay"]:
             core_config[k] = float(core_config[k])