// ***************************************************************************
// ***************************************************************************
// Copyright 2011(c) Analog Devices, Inc.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//     - Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     - Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in
//       the documentation and/or other materials provided with the
//       distribution.
//     - Neither the name of Analog Devices, Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//     - The use of this software may or may not infringe the patent rights
//       of one or more patent holders.  This license does not release you
//       from the requirement that you obtain separate licenses from these
//       patent holders to use this software.
//     - Use of the software either in source or binary form, must be run
//       on or directly connected to an Analog Devices Inc. component.
//
// THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED.
//
// IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY
// RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// ***************************************************************************
// ***************************************************************************
// ***************************************************************************
// ***************************************************************************

`timescale 1ns/100ps

module system_top (

  ddr_addr,
  ddr_ba,
  ddr_cas_n,
  ddr_ck_n,
  ddr_ck_p,
  ddr_cke,
  ddr_cs_n,
  ddr_dm,
  ddr_dq,
  ddr_dqs_n,
  ddr_dqs_p,
  ddr_odt,
  ddr_ras_n,
  ddr_reset_n,
  ddr_we_n,

  fixed_io_ddr_vrn,
  fixed_io_ddr_vrp,
  fixed_io_mio,
  fixed_io_ps_clk,
  fixed_io_ps_porb,
  fixed_io_ps_srstb,

  gpio_bd,

  hdmi_out_clk,
  hdmi_vsync,
  hdmi_hsync,
  hdmi_data_e,
  hdmi_data,

  i2s_mclk,
  i2s_bclk,
  i2s_lrclk,
  i2s_sdata_out,
  i2s_sdata_in,

  spdif,

  iic_scl,
  iic_sda,
  iic_mux_scl,
  iic_mux_sda,

  hdmi_iic_rstn,
  hdmi_iic_scl,
  hdmi_iic_sda,
  
  hdmi_rx_clk,
  hdmi_tx_clk,
  
  hdmi_rx_data,
  hdmi_tx_data,
  
  hdmiio_int,
  
  otg_vbusoc);

  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          spdif;

  output          i2s_mclk;
  output          i2s_bclk;
  output          i2s_lrclk;
  output          i2s_sdata_out;
  input           i2s_sdata_in;

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

  output          hdmi_iic_rstn;
  inout           hdmi_iic_scl;
  inout           hdmi_iic_sda;

  inout           hdmiio_int;

  input           otg_vbusoc;

  // imageon ports
  
  input           hdmi_rx_clk;
  output          hdmi_tx_clk;

  input   [15:0]  hdmi_rx_data;
  output  [15:0]  hdmi_tx_data;

  // 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            hdmi_rx_clk;
  wire            hdmi_tx_clk;

  wire    [15:0]  hdmi_rx_data;
  reg     [15:0]  hdmi_rx_data_in;
  reg     [15:0]  hdmi_tx_data;
  
  always @(posedge hdmi_rx_clk) begin
    hdmi_rx_data_in <= hdmi_rx_data;
    hdmi_tx_data <= hdmi_rx_data_in;
  end

  assign hdmi_iic_rstn = 1'b1;

  // instantiations

  ODDR #(.INIT(1'b0)) i_clk_oddr (
    .R (1'b0),
    .S (1'b0),
    .CE (1'b1),
    .D1 (1'b1),
    .D2 (1'b0),
    .C (hdmi_rx_clk),
    .Q (hdmi_tx_clk));

  ad_iobuf #(.DATA_WIDTH(1)) i_gpio_hdmi (
    .dt (gpio_t[32]),
    .di (gpio_o[32]),
    .do (gpio_i[32]),
    .dio (hdmiio_int));

  ad_iobuf #(
    .DATA_WIDTH(32)
  ) i_iobuf (
    .dt(gpio_t[31:0]),
    .di(gpio_o[31:0]),
    .do(gpio_i[31:0]),
    .dio(gpio_bd));

  ad_iobuf #(
    .DATA_WIDTH(2)
  ) i_iic_mux_scl (
    .dt({iic_mux_scl_t_s, iic_mux_scl_t_s}),
    .di(iic_mux_scl_o_s),
    .do(iic_mux_scl_i_s),
    .dio(iic_mux_scl));

  ad_iobuf #(
    .DATA_WIDTH(2)
  ) i_iic_mux_sda (
    .dt({iic_mux_sda_t_s, iic_mux_sda_t_s}),
    .di(iic_mux_sda_o_s),
    .do(iic_mux_sda_i_s),
    .dio(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),
	.iic_imageon_scl_io (hdmi_iic_scl),
	.iic_imageon_sda_io (hdmi_iic_sda),
    .ps_intr_00 (1'b0),
    .ps_intr_01 (1'b0),
    .ps_intr_02 (1'b0),
    .ps_intr_03 (1'b0),
    .ps_intr_04 (1'b0),
    .ps_intr_05 (1'b0),
    .ps_intr_06 (1'b0),
    .ps_intr_07 (1'b0),
    .ps_intr_08 (1'b0),
    .ps_intr_09 (1'b0),
    .ps_intr_10 (1'b0),
    .ps_intr_12 (1'b0),
    .ps_intr_13 (1'b0),
    .otg_vbusoc (otg_vbusoc),
    .spdif (spdif));

endmodule

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