// ***************************************************************************
// ***************************************************************************
// Copyright 2014 - 2020 (c) 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       [31:0]      gpio_bd,

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

  output                  i2s_mclk,
  output                  i2s_bclk,
  output                  i2s_lrclk,
  output                  i2s_sdata_out,
  input                   i2s_sdata_in,

  output                  spdif,

  inout                   iic_scl,
  inout                   iic_sda,
  inout       [ 1:0]      iic_mux_scl,
  inout       [ 1:0]      iic_mux_sda,

  input                   otg_vbusoc,

  // FMC connector
  output                  spi_clk,
  output                  spi_dio,
  input                   spi_do,
  output                  spi_en,

  // Device clock passed through 9001
  input                   dev_clk_out,

  inout                   dgpio_0,
  inout                   dgpio_1,
  inout                   dgpio_2,
  inout                   dgpio_3,
  inout                   dgpio_4,
  inout                   dgpio_5,
  inout                   dgpio_6,
  inout                   dgpio_7,
  inout                   dgpio_8,
  inout                   dgpio_9,
  inout                   dgpio_10,
  inout                   dgpio_11,

  inout                   gp_int,
  inout                   mode,
  inout                   reset_trx,

  input                   rx1_dclk_in_n,
  input                   rx1_dclk_in_p,
  inout                   rx1_enable,
  input                   rx1_idata_in_n,
  input                   rx1_idata_in_p,
  input                   rx1_qdata_in_n,
  input                   rx1_qdata_in_p,
  input                   rx1_strobe_in_n,
  input                   rx1_strobe_in_p,

  input                   rx2_dclk_in_n,
  input                   rx2_dclk_in_p,
  inout                   rx2_enable,
  input                   rx2_idata_in_n,
  input                   rx2_idata_in_p,
  input                   rx2_qdata_in_n,
  input                   rx2_qdata_in_p,
  input                   rx2_strobe_in_n,
  input                   rx2_strobe_in_p,

  output                  tx1_dclk_out_n,
  output                  tx1_dclk_out_p,
  input                   tx1_dclk_in_n,
  input                   tx1_dclk_in_p,
  inout                   tx1_enable,
  output                  tx1_idata_out_n,
  output                  tx1_idata_out_p,
  output                  tx1_qdata_out_n,
  output                  tx1_qdata_out_p,
  output                  tx1_strobe_out_n,
  output                  tx1_strobe_out_p,

  output                  tx2_dclk_out_n,
  output                  tx2_dclk_out_p,
  input                   tx2_dclk_in_n,
  input                   tx2_dclk_in_p,
  inout                   tx2_enable,
  output                  tx2_idata_out_n,
  output                  tx2_idata_out_p,
  output                  tx2_qdata_out_n,
  output                  tx2_qdata_out_p,
  output                  tx2_strobe_out_n,
  output                  tx2_strobe_out_p,

  inout                   sm_fan_tach,
  input                   vadj_err,
  output                  platform_status
);

  // internal registers

  // internal signals

  wire    [63:0]  gpio_i;
  wire    [63:0]  gpio_o;
  wire    [63:0]  gpio_t;
  wire    [ 1:0]  iic_mux_scl_i_s;
  wire    [ 1:0]  iic_mux_scl_o_s;
  wire            iic_mux_scl_t_s;
  wire    [ 1:0]  iic_mux_sda_i_s;
  wire    [ 1:0]  iic_mux_sda_o_s;
  wire            iic_mux_sda_t_s;
  wire            spi_clk_s;
  wire            spi_en_s;
  wire            spi_dio_s;

  // instantiations

  // multi-ssi synchronization
  //
  assign mssi_sync = gpio_o[54];

  assign platform_status = vadj_err;

  ad_iobuf #(
    .DATA_WIDTH(32)
  ) i_iobuf_carrier (
    .dio_t(gpio_t[31:0]),
    .dio_i(gpio_o[31:0]),
    .dio_o(gpio_i[31:0]),
    .dio_p(gpio_bd));

  ad_iobuf #(.DATA_WIDTH(20)) i_iobuf (
    .dio_t (vadj_err ? {20{1'b1}} : gpio_t[51:32]),
    .dio_i ({gpio_o[51:32]}),
    .dio_o ({gpio_i[51:32]}),
    .dio_p ({tx2_enable,  // 51
             tx1_enable,  // 50
             rx2_enable,  // 49
             rx1_enable,  // 48
             sm_fan_tach, // 47
             reset_trx,   // 46
             mode,        // 45
             gp_int,      // 44
             dgpio_11,    // 43
             dgpio_10,    // 42
             dgpio_9,     // 41
             dgpio_8,     // 40
             dgpio_7,     // 39
             dgpio_6,     // 38
             dgpio_5,     // 37
             dgpio_4,     // 36
             dgpio_3,     // 35
             dgpio_2,     // 34
             dgpio_1,     // 33
             dgpio_0 })); // 32

  assign gpio_i[54:52] = gpio_o[54:52];
  assign gpio_i[55] = vadj_err;
  assign gpio_i[63:56] = gpio_o[63:56];

   ad_iobuf #(.DATA_WIDTH(2)) i_iobuf_iic_scl (
    .dio_t ({iic_mux_scl_t_s,iic_mux_scl_t_s}),
    .dio_i (iic_mux_scl_o_s),
    .dio_o (iic_mux_scl_i_s),
    .dio_p (iic_mux_scl));

   ad_iobuf #(.DATA_WIDTH(2)) i_iobuf_iic_sda (
    .dio_t ({iic_mux_sda_t_s,iic_mux_sda_t_s}),
    .dio_i (iic_mux_sda_o_s),
    .dio_o (iic_mux_sda_i_s),
    .dio_p (iic_mux_sda));

  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),
    .i2s_bclk (i2s_bclk),
    .i2s_lrclk (i2s_lrclk),
    .i2s_mclk (i2s_mclk),
    .i2s_sdata_in (i2s_sdata_in),
    .i2s_sdata_out (i2s_sdata_out),
    .iic_fmc_scl_io (iic_scl),
    .iic_fmc_sda_io (iic_sda),
    .iic_mux_scl_i (iic_mux_scl_i_s),
    .iic_mux_scl_o (iic_mux_scl_o_s),
    .iic_mux_scl_t (iic_mux_scl_t_s),
    .iic_mux_sda_i (iic_mux_sda_i_s),
    .iic_mux_sda_o (iic_mux_sda_o_s),
    .iic_mux_sda_t (iic_mux_sda_t_s),
    .otg_vbusoc (otg_vbusoc),
    .spdif (spdif),
    //FMC connections
    .ref_clk (1'b0),
    .mssi_sync (mssi_sync),

    .tx_output_enable (~vadj_err),

    .rx1_dclk_in_n (rx1_dclk_in_n),
    .rx1_dclk_in_p (rx1_dclk_in_p),
    .rx1_idata_in_n (rx1_idata_in_n),
    .rx1_idata_in_p (rx1_idata_in_p),
    .rx1_qdata_in_n (rx1_qdata_in_n),
    .rx1_qdata_in_p (rx1_qdata_in_p),
    .rx1_strobe_in_n (rx1_strobe_in_n),
    .rx1_strobe_in_p (rx1_strobe_in_p),

    .rx2_dclk_in_n (rx2_dclk_in_n),
    .rx2_dclk_in_p (rx2_dclk_in_p),
    .rx2_idata_in_n (rx2_idata_in_n),
    .rx2_idata_in_p (rx2_idata_in_p),
    .rx2_qdata_in_n (rx2_qdata_in_n),
    .rx2_qdata_in_p (rx2_qdata_in_p),
    .rx2_strobe_in_n (rx2_strobe_in_n),
    .rx2_strobe_in_p (rx2_strobe_in_p),

    .tx1_dclk_out_n (tx1_dclk_out_n),
    .tx1_dclk_out_p (tx1_dclk_out_p),
    .tx1_dclk_in_n (tx1_dclk_in_n),
    .tx1_dclk_in_p (tx1_dclk_in_p),
    .tx1_idata_out_n (tx1_idata_out_n),
    .tx1_idata_out_p (tx1_idata_out_p),
    .tx1_qdata_out_n (tx1_qdata_out_n),
    .tx1_qdata_out_p (tx1_qdata_out_p),
    .tx1_strobe_out_n (tx1_strobe_out_n),
    .tx1_strobe_out_p (tx1_strobe_out_p),

    .tx2_dclk_out_n (tx2_dclk_out_n),
    .tx2_dclk_out_p (tx2_dclk_out_p),
    .tx2_dclk_in_n (tx2_dclk_in_n),
    .tx2_dclk_in_p (tx2_dclk_in_p),
    .tx2_idata_out_n (tx2_idata_out_n),
    .tx2_idata_out_p (tx2_idata_out_p),
    .tx2_qdata_out_n (tx2_qdata_out_n),
    .tx2_qdata_out_p (tx2_qdata_out_p),
    .tx2_strobe_out_n (tx2_strobe_out_n),
    .tx2_strobe_out_p (tx2_strobe_out_p),

    .spi0_clk_i (1'b0),
    .spi0_clk_o (spi_clk_s),
    .spi0_csn_0_o (spi_en_s),
    .spi0_csn_1_o (),
    .spi0_csn_2_o (),
    .spi0_csn_i (1'b1),
    .spi0_sdi_i (spi_do),
    .spi0_sdo_i (1'b0),
    .spi0_sdo_o (spi_dio_s),
    .spi1_clk_i (1'b0),
    .spi1_clk_o (),
    .spi1_csn_0_o (),
    .spi1_csn_1_o (),
    .spi1_csn_2_o (),
    .spi1_csn_i (1'b1),
    .spi1_sdi_i (1'b0),
    .spi1_sdo_i (1'b0),
    .spi1_sdo_o ()
  );

 assign spi_clk = vadj_err ? 1'bz : spi_clk_s;
 assign spi_en  = vadj_err ? 1'bz : spi_en_s;
 assign spi_dio = vadj_err ? 1'bz : spi_dio_s;

endmodule

// ***************************************************************************
// ***************************************************************************