/*

Copyright (c) 2014-2018 Alex Forencich

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

*/

// Language: Verilog 2001

`timescale 1ns / 1ps

/*
 * FPGA core logic
 */
module ethernet_100m
(
    `ifdef USE_POWER_PINS
        inout vccd1,	// User area 1 1.8V supply
        inout vssd1,	// User area 1 digital ground
    `endif
    /*
     * Clock: 125MHz
     * Synchronous reset
     */
    input  wire       clk,
    input  wire       rst,

    /*
     * Ethernet: 100BASE-T MII
     */
    input  wire       phy_rx_clk,
    input  wire [3:0] phy_rxd,
    input  wire       phy_rx_dv,
    input  wire       phy_rx_er,
    input  wire       phy_tx_clk,
    output wire [3:0] phy_txd,
    output wire       phy_tx_en
);

wire [7:0] rx_udp_payload_axis_tdata;
wire rx_udp_payload_axis_tvalid;
wire rx_udp_payload_axis_tready;
wire rx_udp_payload_axis_tlast;

wire [7:0] tx_udp_payload_axis_tdata;
wire tx_udp_payload_axis_tvalid;
wire tx_udp_payload_axis_tready;
wire tx_udp_payload_axis_tlast;

ethernet_core #(
	.TARGET("GENERIC"),
    .LOCAL_MAC(48'h02_00_00_00_00_00),
    .LOCAL_IP({8'd192, 8'd168, 8'd1,   8'd128}),
    .GATEWAY_IP({8'd192, 8'd168, 8'd1,   8'd1}),
    .SUBNET_MASK({8'd255, 8'd255, 8'd255, 8'd0})
)
core (
    .clk(clk),
    .rst(rst),
    .phy_rx_clk(phy_rx_clk),
    .phy_rxd(phy_rxd),
    .phy_rx_dv(phy_rx_dv),
    .phy_rx_er(phy_rx_er),
    .phy_tx_clk(phy_tx_clk),
    .phy_txd(phy_txd),
    .phy_tx_en(phy_tx_en),
    .phy_reset_n(),
	.rx_udp_payload_axis_tdata(rx_udp_payload_axis_tdata),
    .rx_udp_payload_axis_tvalid(rx_udp_payload_axis_tvalid),
    .rx_udp_payload_axis_tready(rx_udp_payload_axis_tready),
    .rx_udp_payload_axis_tlast(rx_udp_payload_axis_tlast),
    .rx_udp_payload_axis_tuser(),
	.tx_udp_payload_axis_tdata(tx_udp_payload_axis_tdata),
    .tx_udp_payload_axis_tvalid(tx_udp_payload_axis_tvalid),
    .tx_udp_payload_axis_tready(tx_udp_payload_axis_tready),
    .tx_udp_payload_axis_tlast(tx_udp_payload_axis_tlast),
    .tx_udp_payload_axis_tuser(0)
);

axis_fifo #(
    .DEPTH(512),
    .DATA_WIDTH(8),
    .KEEP_ENABLE(0),
    .ID_ENABLE(0),
    .DEST_ENABLE(0),
    .USER_ENABLE(1),
    .USER_WIDTH(1),
    .FRAME_FIFO(0)
)
udp_payload_fifo (
    .clk(clk),
    .rst(rst),
    .s_axis_tdata(rx_udp_payload_axis_tdata),
    .s_axis_tkeep(0),
    .s_axis_tvalid(rx_udp_payload_axis_tvalid),
    .s_axis_tready(rx_udp_payload_axis_tready),
    .s_axis_tlast(rx_udp_payload_axis_tlast),
    .s_axis_tid(0),
    .s_axis_tdest(0),
    .s_axis_tuser(0),
    .m_axis_tdata(tx_udp_payload_axis_tdata),
    .m_axis_tkeep(),
    .m_axis_tvalid(tx_udp_payload_axis_tvalid),
    .m_axis_tready(tx_udp_payload_axis_tready),
    .m_axis_tlast(tx_udp_payload_axis_tlast),
    .m_axis_tid(),
    .m_axis_tdest(),
    .m_axis_tuser(),
    .status_overflow(),
    .status_bad_frame(),
    .status_good_frame()
);
endmodule