// ***************************************************************************
// ***************************************************************************
// Copyright (C) 2014-2023 Analog Devices, Inc. All rights reserved.
//
// In this HDL repository, there are many different and unique modules, consisting
// of various HDL (Verilog or VHDL) components. The individual modules are
// developed independently, and may be accompanied by separate and unique license
// terms.
//
// The user should read each of these license terms, and understand the
// freedoms and responsibilities that he or she has by using this source/core.
//
// This core 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.
//
// Redistribution and use of source or resulting binaries, with or without modification
// of this file, are permitted under one of the following two license terms:
//
//   1. The GNU General Public License version 2 as published by the
//      Free Software Foundation, which can be found in the top level directory
//      of this repository (LICENSE_GPL2), and also online at:
//      <https://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
//
// OR
//
//   2. An ADI specific BSD license, which can be found in the top level directory
//      of this repository (LICENSE_ADIBSD), and also on-line at:
//      https://github.com/analogdevicesinc/hdl/blob/main/LICENSE_ADIBSD
//      This will allow to generate bit files and not release the source code,
//      as long as it attaches to an ADI device.
//
// ***************************************************************************
// ***************************************************************************

`timescale 1ns/100ps

module system_top (

  inout       [14:0]      ddr_addr,
  inout       [ 2:0]      ddr_ba,
  inout                   ddr_cas_n,
  inout                   ddr_ck_n,
  inout                   ddr_ck_p,
  inout                   ddr_cke,
  inout                   ddr_cs_n,
  inout       [ 3:0]      ddr_dm,
  inout       [31:0]      ddr_dq,
  inout       [ 3:0]      ddr_dqs_n,
  inout       [ 3:0]      ddr_dqs_p,
  inout                   ddr_odt,
  inout                   ddr_ras_n,
  inout                   ddr_reset_n,
  inout                   ddr_we_n,

  inout                   fixed_io_ddr_vrn,
  inout                   fixed_io_ddr_vrp,
  inout       [53:0]      fixed_io_mio,
  inout                   fixed_io_ps_clk,
  inout                   fixed_io_ps_porb,
  inout                   fixed_io_ps_srstb,

  inout       [11:0]      gpio_bd,

  output                  hdmi_out_clk,
  output                  hdmi_vsync,
  output                  hdmi_hsync,
  output                  hdmi_data_e,
  output      [15:0]      hdmi_data,

  output                  spdif,

  inout                   iic_scl,
  inout                   iic_sda,

  input                   rx_clk_in_p,
  input                   rx_clk_in_n,
  input                   rx_frame_in_p,
  input                   rx_frame_in_n,
  input       [ 5:0]      rx_data_in_p,
  input       [ 5:0]      rx_data_in_n,
  output                  tx_clk_out_p,
  output                  tx_clk_out_n,
  output                  tx_frame_out_p,
  output                  tx_frame_out_n,
  output      [ 5:0]      tx_data_out_p,
  output      [ 5:0]      tx_data_out_n,

  output                  txnrx,
  output                  enable,

  inout                   gpio_muxout_tx,
  inout                   gpio_muxout_rx,
  inout                   gpio_resetb,
  inout                   gpio_sync,
  inout                   gpio_en_agc,
  inout       [ 3:0]      gpio_ctl,
  inout       [ 7:0]      gpio_status,

  output                  spi_csn,
  output                  spi_clk,
  output                  spi_mosi,
  input                   spi_miso,

  output                  spi_udc_csn_tx,
  output                  spi_udc_csn_rx,
  output                  spi_udc_sclk,
  output                  spi_udc_data
);

  // internal signals

  wire    [63:0]  gpio_i;
  wire    [63:0]  gpio_o;
  wire    [63:0]  gpio_t;

  wire            tdd_sync_t;
  wire            tdd_sync_o;
  wire            tdd_sync_i;

  // instantiations

  ad_iobuf #(
    .DATA_WIDTH(17)
  ) i_iobuf (
    .dio_t ({gpio_t[50:49],gpio_t[46:32]}),
    .dio_i ({gpio_o[50:49],gpio_o[46:32]}),
    .dio_o ({gpio_i[50:49],gpio_i[46:32]}),
    .dio_p ({ gpio_muxout_tx, // 50:50
              gpio_muxout_rx, // 49:49
              gpio_resetb,    // 46:46
              gpio_sync,      // 45:45
              gpio_en_agc,    // 44:44
              gpio_ctl,       // 43:40
              gpio_status})); // 39:32

  ad_iobuf #(
    .DATA_WIDTH(12)
  ) i_gpio_bd (
    .dio_t ({gpio_t[15:12], gpio_t[7:0]}),
    .dio_i ({gpio_o[15:12], gpio_o[7:0]}),
    .dio_o ({gpio_i[15:12], gpio_i[7:0]}),
    .dio_p ({gpio_bd[7:4], gpio_bd[11:8], gpio_bd[3:0]}));

  assign gpio_i[63:51] = gpio_o[63:51];
  assign gpio_i[48:47] = gpio_o[48:47];
  assign gpio_i[31:16] = gpio_o[31:16];
  assign gpio_i[11: 8] = gpio_o[11: 8];

  system_wrapper i_system_wrapper (
    .ddr_addr (ddr_addr),
    .ddr_ba (ddr_ba),
    .ddr_cas_n (ddr_cas_n),
    .ddr_ck_n (ddr_ck_n),
    .ddr_ck_p (ddr_ck_p),
    .ddr_cke (ddr_cke),
    .ddr_cs_n (ddr_cs_n),
    .ddr_dm (ddr_dm),
    .ddr_dq (ddr_dq),
    .ddr_dqs_n (ddr_dqs_n),
    .ddr_dqs_p (ddr_dqs_p),
    .ddr_odt (ddr_odt),
    .ddr_ras_n (ddr_ras_n),
    .ddr_reset_n (ddr_reset_n),
    .ddr_we_n (ddr_we_n),
    .fixed_io_ddr_vrn (fixed_io_ddr_vrn),
    .fixed_io_ddr_vrp (fixed_io_ddr_vrp),
    .fixed_io_mio (fixed_io_mio),
    .fixed_io_ps_clk (fixed_io_ps_clk),
    .fixed_io_ps_porb (fixed_io_ps_porb),
    .fixed_io_ps_srstb (fixed_io_ps_srstb),
    .gpio_i (gpio_i),
    .gpio_o (gpio_o),
    .gpio_t (gpio_t),
    .hdmi_data (hdmi_data),
    .hdmi_data_e (hdmi_data_e),
    .hdmi_hsync (hdmi_hsync),
    .hdmi_out_clk (hdmi_out_clk),
    .hdmi_vsync (hdmi_vsync),
    .iic_main_scl_io (iic_scl),
    .iic_main_sda_io (iic_sda),
    .rx_clk_in_n (rx_clk_in_n),
    .rx_clk_in_p (rx_clk_in_p),
    .rx_data_in_n (rx_data_in_n),
    .rx_data_in_p (rx_data_in_p),
    .rx_frame_in_n (rx_frame_in_n),
    .rx_frame_in_p (rx_frame_in_p),
    .spdif (spdif),
    .spi0_csn_i (1'b1),
    .spi0_csn_0_o (spi_csn),
    .spi0_csn_1_o(),
    .spi0_csn_2_o(),
    .spi0_sdi_i (spi_miso),
    .spi0_sdo_i (1'b0),
    .spi0_sdo_o (spi_mosi),
    .spi0_clk_i (1'b0),
    .spi0_clk_o (spi_clk),
    .tx_clk_out_n (tx_clk_out_n),
    .tx_clk_out_p (tx_clk_out_p),
    .tx_data_out_n (tx_data_out_n),
    .tx_data_out_p (tx_data_out_p),
    .tx_frame_out_n (tx_frame_out_n),
    .tx_frame_out_p (tx_frame_out_p),
    .tdd_sync_i (1'b0),
    .tdd_sync_o (),
    .tdd_sync_t (),
    .spi1_clk_i (1'b0),
    .spi1_clk_o (spi_udc_sclk),
    .spi1_csn_i (1'b1),
    .spi1_csn_0_o (spi_udc_csn_tx),
    .spi1_csn_1_o (spi_udc_csn_rx),
    .spi1_csn_2_o(),
    .spi1_sdo_i (spi_udc_data),
    .spi1_sdo_o (spi_udc_data),
    .spi1_sdi_i (1'b0),
    .enable (enable),
    .txnrx (txnrx),
    .up_enable (gpio_o[47]),
    .up_txnrx (gpio_o[48]));

endmodule