3 (input clk125, input reset,
5 output GMII_GTX_CLK, output GMII_TX_EN, output GMII_TX_ER, output [7:0] GMII_TXD,
6 input GMII_RX_CLK, input GMII_RX_DV, input GMII_RX_ER, input [7:0] GMII_RXD,
8 // Flow Control Interface
9 input pause_req, input [15:0] pause_time,
11 // RX Client Interface
12 output rx_clk, output [7:0] rx_data, output rx_valid, output rx_error, output rx_ack,
14 // TX Client Interface
15 output tx_clk, input [7:0] tx_data, input tx_valid, input tx_error, output tx_ack
18 localparam SGE_IFG = 8'd12; // 12 should be the absolute minimum
19 localparam SGE_RESPECT_FLOW_CTRL = 1'b1; // stop sending if other side requests
21 wire rst_rxclk, rst_txclk;
22 oneshot_2clk tx_rst_1shot (.clk_in(tx_clk),.in(reset),.clk_out(tx_clk),.out(rst_txclk)); // FIXME clocks
23 oneshot_2clk rx_rst_1shot (.clk_in(rx_clk),.in(reset),.clk_out(rx_clk),.out(rst_rxclk));
25 wire [15:0] pause_quanta_rcvd;
27 wire [47:0] ucast_addr = 48'hF1F2_F3F4_F5F6;
28 wire [47:0] mcast_addr = 0;
29 wire pass_ucast =1, pass_mcast=0, pass_bcast=1, pass_pause=0, pass_all=0;
31 simple_gemac_tx simple_gemac_tx
32 (.clk125(clk125),.reset(rst_txclk),
33 .GMII_GTX_CLK(GMII_GTX_CLK), .GMII_TX_EN(GMII_TX_EN),
34 .GMII_TX_ER(GMII_TX_ER), .GMII_TXD(GMII_TXD),
35 .tx_clk(tx_clk), .tx_data(tx_data), .tx_valid(tx_valid), .tx_error(tx_error), .tx_ack(tx_ack),
36 .ifg(SGE_IFG), .mac_addr(ucast_addr),
37 .pause_req(pause_req), .pause_time(pause_time), // We request flow control
38 .pause_apply(pause_apply), .paused(paused) // We respect flow control
41 simple_gemac_rx simple_gemac_rx
43 .GMII_RX_CLK(GMII_RX_CLK), .GMII_RX_DV(GMII_RX_DV),
44 .GMII_RX_ER(GMII_RX_ER), .GMII_RXD(GMII_RXD),
45 .rx_clk(rx_clk), .rx_data(rx_data), .rx_valid(rx_valid), .rx_error(rx_error), .rx_ack(rx_ack),
46 .ucast_addr(ucast_addr), .mcast_addr(mcast_addr),
47 .pass_ucast(pass_ucast), .pass_mcast(pass_mcast), .pass_bcast(pass_bcast),
48 .pass_pause(pass_pause), .pass_all(pass_all),
49 .pause_quanta_rcvd(pause_quanta_rcvd), .pause_rcvd(pause_rcvd)
52 flow_ctrl_tx flow_ctrl_tx
53 (.rst(rst_txclk), .tx_clk(tx_clk),
54 .tx_pause_en(SGE_RESPECT_FLOW_CTRL),
55 .pause_quanta(pause_quanta_rcvd), // 16 bit value
56 .pause_quanta_val(pause_rcvd),
57 .pause_apply(pause_apply),
61 endmodule // simple_gemac