// ***************************************************************************
// ***************************************************************************
// 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/master/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       [14:0]      gpio_bd,

  output                  hdmi_out_clk,
  output                  hdmi_vsync,
  output                  hdmi_hsync,
  output                  hdmi_data_e,
  output      [23:0]      hdmi_data,

  output                  spdif,

  inout                   iic_scl,
  inout                   iic_sda,

  input                   rx_ref_clk_p,
  input                   rx_ref_clk_n,
  output                  rx_sysref,
  output                  rx_sync,
  input       [ 3:0]      rx_data_p,
  input       [ 3:0]      rx_data_n,

  output                  spi_csn,
  output                  spi_clk,
  inout                   spi_sdio
);

  // internal signals

  wire    [63:0]  gpio_i;
  wire    [63:0]  gpio_o;
  wire    [63:0]  gpio_t;
  wire            rx_ref_clk;
  wire    [ 2:0]  spi0_csn;
  wire            spi0_clk;
  wire            spi0_mosi;
  wire            spi0_miso;
  wire    [ 2:0]  spi1_csn;
  wire            spi1_clk;
  wire            spi1_mosi;
  wire            spi1_miso;
  wire            rx_clk;

  assign spi_csn = spi0_csn[0];
  assign spi_clk = spi0_clk;
  assign spi_mosi = spi0_mosi;
  assign spi0_miso = spi_miso;

  // instantiations

  IBUFDS_GTE2 i_ibufds_rx_ref_clk (
    .CEB (1'd0),
    .I (rx_ref_clk_p),
    .IB (rx_ref_clk_n),
    .O (rx_ref_clk),
    .ODIV2 ());

  ad_iobuf #(
    .DATA_WIDTH(15)
  ) i_iobuf (
    .dio_t (gpio_t[14:0]),
    .dio_i (gpio_o[14:0]),
    .dio_o (gpio_i[14:0]),
    .dio_p (gpio_bd));

  assign gpio_i[63:32] = gpio_o[63:32];
  assign gpio_i[31:15] = gpio_o[31:15];

  assign spi_adc_clk = spi_clk;
  assign spi_clk_clk = spi_clk;

  fmcjesdadc1_spi i_fmcjesdadc1_spi (
    .spi_csn (spi_csn),
    .spi_clk (spi_clk),
    .spi_mosi (spi_mosi),
    .spi_miso (spi_miso),
    .spi_sdio (spi_sdio));

  ad_sysref_gen #(
    .SYSREF_PERIOD(64)
  ) i_sysref (
    .core_clk (rx_clk),
    .sysref_en (gpio_o[32]),
    .sysref_out (rx_sysref));

  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_data_0_n (rx_data_n[0]),
    .rx_data_0_p (rx_data_p[0]),
    .rx_data_1_n (rx_data_n[1]),
    .rx_data_1_p (rx_data_p[1]),
    .rx_data_2_n (rx_data_n[2]),
    .rx_data_2_p (rx_data_p[2]),
    .rx_data_3_n (rx_data_n[3]),
    .rx_data_3_p (rx_data_p[3]),
    .rx_ref_clk_0 (rx_ref_clk),
    .rx_sync_0 (rx_sync),
    .rx_sysref_0 (rx_sysref),
    .rx_core_clk (rx_clk),
    .spdif (spdif),
    .spi0_clk_i (spi0_clk),
    .spi0_clk_o (spi0_clk),
    .spi0_csn_0_o (spi0_csn[0]),
    .spi0_csn_1_o (spi0_csn[1]),
    .spi0_csn_2_o (spi0_csn[2]),
    .spi0_csn_i (1'b1),
    .spi0_sdi_i (spi0_miso),
    .spi0_sdo_i (spi0_mosi),
    .spi0_sdo_o (spi0_mosi),
    .spi1_clk_i (spi1_clk),
    .spi1_clk_o (spi1_clk),
    .spi1_csn_0_o (spi1_csn[0]),
    .spi1_csn_1_o (spi1_csn[1]),
    .spi1_csn_2_o (spi1_csn[2]),
    .spi1_csn_i (1'b1),
    .spi1_sdi_i (1'b1),
    .spi1_sdo_i (spi1_mosi),
    .spi1_sdo_o (spi1_mosi));

endmodule