1 files changed, 81 insertions, 0 deletions
diff --git a/fpga/usrp2/simple_gemac/simple_gemac.v b/fpga/usrp2/simple_gemac/simple_gemac.v
new file mode 100644
index 000000000..ec13d3c96
--- /dev/null
+++ b/fpga/usrp2/simple_gemac/simple_gemac.v
@@ -0,0 +1,81 @@
+//
+// Copyright 2011 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+
+module simple_gemac
+  (input clk125, input reset,
+   // GMII
+   output GMII_GTX_CLK, output GMII_TX_EN, output GMII_TX_ER, output [7:0] GMII_TXD,
+   input GMII_RX_CLK, input GMII_RX_DV, input GMII_RX_ER, input [7:0] GMII_RXD,
+
+   // Flow Control Interface
+   input pause_req, input [15:0] pause_time_req, input pause_respect_en,
+
+   // Settings
+   input [47:0] ucast_addr, input [47:0] mcast_addr,
+   input pass_ucast, input pass_mcast, input pass_bcast, input pass_pause, input pass_all,
+   
+   // RX Client Interface
+   output rx_clk, output [7:0] rx_data, output rx_valid, output rx_error, output rx_ack,
+
+   // TX Client Interface
+   output tx_clk, input [7:0] tx_data, input tx_valid, input tx_error, output tx_ack,
+
+   output [31:0] debug
+   );
+
+   localparam SGE_IFG 		     = 8'd12;  // 12 should be the absolute minimum
+
+   wire rst_rxclk, rst_txclk;   
+   reset_sync reset_sync_tx (.clk(tx_clk),.reset_in(reset),.reset_out(rst_txclk));
+   reset_sync reset_sync_rx (.clk(rx_clk),.reset_in(reset),.reset_out(rst_rxclk));
+
+   wire [15:0] pause_quanta_rcvd;
+   wire        pause_rcvd, pause_apply, paused;
+   
+   simple_gemac_tx simple_gemac_tx
+     (.clk125(clk125),.reset(rst_txclk),
+      .GMII_GTX_CLK(GMII_GTX_CLK), .GMII_TX_EN(GMII_TX_EN),
+      .GMII_TX_ER(GMII_TX_ER), .GMII_TXD(GMII_TXD),
+      .tx_clk(tx_clk), .tx_data(tx_data), .tx_valid(tx_valid), .tx_error(tx_error), .tx_ack(tx_ack),
+      .ifg(SGE_IFG), .mac_addr(ucast_addr),
+      .pause_req(pause_req), .pause_time(pause_time_req),  // We request flow control
+      .pause_apply(pause_apply), .paused(paused)  // We respect flow control
+      );
+
+   simple_gemac_rx simple_gemac_rx
+     (.reset(rst_rxclk),
+      .GMII_RX_CLK(GMII_RX_CLK), .GMII_RX_DV(GMII_RX_DV), 
+      .GMII_RX_ER(GMII_RX_ER), .GMII_RXD(GMII_RXD),
+      .rx_clk(rx_clk), .rx_data(rx_data), .rx_valid(rx_valid), .rx_error(rx_error), .rx_ack(rx_ack),
+      .ucast_addr(ucast_addr), .mcast_addr(mcast_addr),
+      .pass_ucast(pass_ucast), .pass_mcast(pass_mcast), .pass_bcast(pass_bcast), 
+      .pass_pause(pass_pause), .pass_all(pass_all),
+      .pause_quanta_rcvd(pause_quanta_rcvd), .pause_rcvd(pause_rcvd),
+      .debug(debug)
+      );
+
+   flow_ctrl_tx flow_ctrl_tx
+     (.rst(rst_txclk), .tx_clk(tx_clk),
+      .tx_pause_en(pause_respect_en),
+      .pause_quanta(pause_quanta_rcvd), // 16 bit value
+      .pause_quanta_val(pause_rcvd),
+      .pause_apply(pause_apply),
+      .paused(paused)
+      );
+
+endmodule // simple_gemac