// ***************************************************************************
// ***************************************************************************
// 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 (

  sys_rst,
  sys_clk_p,
  sys_clk_n,

  uart_sin,
  uart_sout,

  ddr3_addr,
  ddr3_ba,
  ddr3_cas_n,
  ddr3_ck_n,
  ddr3_ck_p,
  ddr3_cke,
  ddr3_cs_n,
  ddr3_dm,
  ddr3_dq,
  ddr3_dqs_n,
  ddr3_dqs_p,
  ddr3_odt,
  ddr3_ras_n,
  ddr3_reset_n,
  ddr3_we_n,

  sgmii_rxp,
  sgmii_rxn,
  sgmii_txp,
  sgmii_txn,

  phy_rstn,
  mgt_clk_p,
  mgt_clk_n,
  mdio_mdc,
  mdio_mdio,

  fan_pwm,

  gpio_lcd,
  gpio_led,
  gpio_sw,

  iic_rstn,
  iic_scl,
  iic_sda,

  hdmi_out_clk,
  hdmi_hsync,
  hdmi_vsync,
  hdmi_data_e,
  hdmi_data,

  spdif,

  rx_ref_clk_0_p,
  rx_ref_clk_0_n,
  rx_data_0_p,
  rx_data_0_n,
  rx_ref_clk_1_p,
  rx_ref_clk_1_n,
  rx_data_1_p,
  rx_data_1_n,
  rx_sysref_p,
  rx_sysref_n,
  rx_sync_0_p,
  rx_sync_0_n,
  rx_sync_1_p,
  rx_sync_1_n,

  spi_csn_0,
  spi_csn_1,
  spi_clk,
  spi_sdio,
  spi_dirn,

  trig_p,
  trig_n,
  vdither_p,
  vdither_n,
  pwr_good,
  dac_clk,
  dac_data,
  dac_sync_0,
  dac_sync_1,
  fd_1,
  irq_1,
  fd_0,
  irq_0,
  pwdn_1,
  rst_1,
  drst_1,
  arst_1,
  pwdn_0,
  rst_0,
  drst_0,
  arst_0);

  input             sys_rst;
  input             sys_clk_p;
  input             sys_clk_n;

  input             uart_sin;
  output            uart_sout;

  output  [ 13:0]   ddr3_addr;
  output  [  2:0]   ddr3_ba;
  output            ddr3_cas_n;
  output  [  0:0]   ddr3_ck_n;
  output  [  0:0]   ddr3_ck_p;
  output  [  0:0]   ddr3_cke;
  output  [  0:0]   ddr3_cs_n;
  output  [  7:0]   ddr3_dm;
  inout   [ 63:0]   ddr3_dq;
  inout   [  7:0]   ddr3_dqs_n;
  inout   [  7:0]   ddr3_dqs_p;
  output  [  0:0]   ddr3_odt;
  output            ddr3_ras_n;
  output            ddr3_reset_n;
  output            ddr3_we_n;

  input             sgmii_rxp;
  input             sgmii_rxn;
  output            sgmii_txp;
  output            sgmii_txn;

  output            phy_rstn;
  input             mgt_clk_p;
  input             mgt_clk_n;
  output            mdio_mdc;
  inout             mdio_mdio;

  output            fan_pwm;

  output  [  6:0]   gpio_lcd;
  output  [  7:0]   gpio_led;
  input   [ 12:0]   gpio_sw;

  output            iic_rstn;
  inout             iic_scl;
  inout             iic_sda;

  output            hdmi_out_clk;
  output            hdmi_hsync;
  output            hdmi_vsync;
  output            hdmi_data_e;
  output  [ 35:0]   hdmi_data;

  output            spdif;

  input             rx_ref_clk_0_p;
  input             rx_ref_clk_0_n;
  input   [  7:0]   rx_data_0_p;
  input   [  7:0]   rx_data_0_n;
  input             rx_ref_clk_1_p;
  input             rx_ref_clk_1_n;
  input   [  7:0]   rx_data_1_p;
  input   [  7:0]   rx_data_1_n;
  output            rx_sysref_p;
  output            rx_sysref_n;
  output            rx_sync_0_p;
  output            rx_sync_0_n;
  output            rx_sync_1_p;
  output            rx_sync_1_n;

  output            spi_csn_0;
  output            spi_csn_1;
  output            spi_clk;
  inout             spi_sdio;
  output            spi_dirn;

  input             trig_p;
  input             trig_n;
  output            vdither_p;
  output            vdither_n;
  inout             pwr_good;
  inout             dac_clk;
  inout             dac_data;
  inout             dac_sync_0;
  inout             dac_sync_1;
  inout             fd_1;
  inout             irq_1;
  inout             fd_0;
  inout             irq_0;
  inout             pwdn_1;
  inout             rst_1;
  inout             drst_1;
  inout             arst_1;
  inout             pwdn_0;
  inout             rst_0;
  inout             drst_0;
  inout             arst_0;

  // internal registers

  reg               dma_wr = 'd0;
  reg               dma_sync = 'd0;
  reg     [511:0]   dma_data = 'd0;

  // internal signals

  wire    [ 18:0]   gpio_i;
  wire    [ 18:0]   gpio_o;
  wire    [ 18:0]   gpio_t;
  wire              rx_ref_clk_0;
  wire              rx_ref_clk_1;
  wire              rx_sysref;
  wire              rx_sync_0;
  wire              rx_sync_1;
  wire              spi_clk;
  wire              spi_miso;
  wire              spi_mosi;
  wire              adc_clk;
  wire              adc_valid_0;
  wire              adc_enable_0;
  wire    [255:0]   adc_data_0;
  wire              adc_valid_1;
  wire              adc_enable_1;
  wire    [255:0]   adc_data_1;

  // interleaving

  always @(posedge adc_clk) begin
    dma_wr <= adc_enable_0 & adc_enable_1;
    dma_sync <= 1'b1;
    dma_data[((16*31)+15):(16*31)] <= adc_data_1[((16*15)+15):(16*15)];
    dma_data[((16*30)+15):(16*30)] <= adc_data_0[((16*15)+15):(16*15)];
    dma_data[((16*29)+15):(16*29)] <= adc_data_1[((16*14)+15):(16*14)];
    dma_data[((16*28)+15):(16*28)] <= adc_data_0[((16*14)+15):(16*14)];
    dma_data[((16*27)+15):(16*27)] <= adc_data_1[((16*13)+15):(16*13)];
    dma_data[((16*26)+15):(16*26)] <= adc_data_0[((16*13)+15):(16*13)];
    dma_data[((16*25)+15):(16*25)] <= adc_data_1[((16*12)+15):(16*12)];
    dma_data[((16*24)+15):(16*24)] <= adc_data_0[((16*12)+15):(16*12)];
    dma_data[((16*23)+15):(16*23)] <= adc_data_1[((16*11)+15):(16*11)];
    dma_data[((16*22)+15):(16*22)] <= adc_data_0[((16*11)+15):(16*11)];
    dma_data[((16*21)+15):(16*21)] <= adc_data_1[((16*10)+15):(16*10)];
    dma_data[((16*20)+15):(16*20)] <= adc_data_0[((16*10)+15):(16*10)];
    dma_data[((16*19)+15):(16*19)] <= adc_data_1[((16* 9)+15):(16* 9)];
    dma_data[((16*18)+15):(16*18)] <= adc_data_0[((16* 9)+15):(16* 9)];
    dma_data[((16*17)+15):(16*17)] <= adc_data_1[((16* 8)+15):(16* 8)];
    dma_data[((16*16)+15):(16*16)] <= adc_data_0[((16* 8)+15):(16* 8)];
    dma_data[((16*15)+15):(16*15)] <= adc_data_1[((16* 7)+15):(16* 7)];
    dma_data[((16*14)+15):(16*14)] <= adc_data_0[((16* 7)+15):(16* 7)];
    dma_data[((16*13)+15):(16*13)] <= adc_data_1[((16* 6)+15):(16* 6)];
    dma_data[((16*12)+15):(16*12)] <= adc_data_0[((16* 6)+15):(16* 6)];
    dma_data[((16*11)+15):(16*11)] <= adc_data_1[((16* 5)+15):(16* 5)];
    dma_data[((16*10)+15):(16*10)] <= adc_data_0[((16* 5)+15):(16* 5)];
    dma_data[((16* 9)+15):(16* 9)] <= adc_data_1[((16* 4)+15):(16* 4)];
    dma_data[((16* 8)+15):(16* 8)] <= adc_data_0[((16* 4)+15):(16* 4)];
    dma_data[((16* 7)+15):(16* 7)] <= adc_data_1[((16* 3)+15):(16* 3)];
    dma_data[((16* 6)+15):(16* 6)] <= adc_data_0[((16* 3)+15):(16* 3)];
    dma_data[((16* 5)+15):(16* 5)] <= adc_data_1[((16* 2)+15):(16* 2)];
    dma_data[((16* 4)+15):(16* 4)] <= adc_data_0[((16* 2)+15):(16* 2)];
    dma_data[((16* 3)+15):(16* 3)] <= adc_data_1[((16* 1)+15):(16* 1)];
    dma_data[((16* 2)+15):(16* 2)] <= adc_data_0[((16* 1)+15):(16* 1)];
    dma_data[((16* 1)+15):(16* 1)] <= adc_data_1[((16* 0)+15):(16* 0)];
    dma_data[((16* 0)+15):(16* 0)] <= adc_data_0[((16* 0)+15):(16* 0)];
  end

  // instantiations

  IBUFDS_GTE2 i_ibufds_rx_ref_clk_0 (
    .CEB (1'd0),
    .I (rx_ref_clk_0_p),
    .IB (rx_ref_clk_0_n),
    .O (rx_ref_clk_0),
    .ODIV2 ());

  IBUFDS_GTE2 i_ibufds_rx_ref_clk_1 (
    .CEB (1'd0),
    .I (rx_ref_clk_1_p),
    .IB (rx_ref_clk_1_n),
    .O (rx_ref_clk_1),
    .ODIV2 ());

  OBUFDS i_obufds_rx_sysref (
    .I (rx_sysref),
    .O (rx_sysref_p),
    .OB (rx_sysref_n));

  OBUFDS i_obufds_rx_sync_0 (
    .I (rx_sync_0),
    .O (rx_sync_0_p),
    .OB (rx_sync_0_n));

  OBUFDS i_obufds_rx_sync_1 (
    .I (rx_sync_1),
    .O (rx_sync_1_p),
    .OB (rx_sync_1_n));

  IBUFDS i_ibufds_trig (
    .I (trig_p),
    .IB (trig_n),
    .O (gpio_i[18]));

  OBUFDS i_obufds_vdither (
    .I (gpio_o[17]),
    .O (vdither_p),
    .OB (vdither_n));

  ad_iobuf #(.DATA_WIDTH(17)) i_iobuf (
    .dt (gpio_t[16:0]),
    .di (gpio_o[16:0]),
    .do (gpio_i[16:0]),
    .dio ({ pwr_good,       // 16
            dac_clk,        // 15
            dac_data,       // 14
            dac_sync_0,     // 13
            dac_sync_1,     // 12
            fd_1,           // 11
            irq_1,          // 10
            fd_0,           //  9
            irq_0,          //  8
            pwdn_1,         //  7
            rst_1,          //  6
            drst_1,         //  5
            arst_1,         //  4
            pwdn_0,         //  3
            rst_0,          //  2
            drst_0,         //  1
            arst_0}));      //  0

  ad9625x2_fmc_spi i_ad9625x2_fmc_spi (
    .spi_csn_0 (spi_csn_0),
    .spi_csn_1 (spi_csn_1),
    .spi_clk (spi_clk),
    .spi_mosi (spi_mosi),
    .spi_miso (spi_miso),
    .spi_sdio (spi_sdio),
    .spi_dirn (spi_dirn));

  system_wrapper i_system_wrapper (
    .adc_clk (adc_clk),
    .adc_data_0 (adc_data_0),
    .adc_data_1 (adc_data_1),
    .adc_enable_0 (adc_enable_0),
    .adc_enable_1 (adc_enable_1),
    .adc_valid_0 (adc_valid_0),
    .adc_valid_1 (adc_valid_1),
    .ddr3_addr (ddr3_addr),
    .ddr3_ba (ddr3_ba),
    .ddr3_cas_n (ddr3_cas_n),
    .ddr3_ck_n (ddr3_ck_n),
    .ddr3_ck_p (ddr3_ck_p),
    .ddr3_cke (ddr3_cke),
    .ddr3_cs_n (ddr3_cs_n),
    .ddr3_dm (ddr3_dm),
    .ddr3_dq (ddr3_dq),
    .ddr3_dqs_n (ddr3_dqs_n),
    .ddr3_dqs_p (ddr3_dqs_p),
    .ddr3_odt (ddr3_odt),
    .ddr3_ras_n (ddr3_ras_n),
    .ddr3_reset_n (ddr3_reset_n),
    .ddr3_we_n (ddr3_we_n),
    .dma_data (dma_data),
    .dma_sync (dma_sync),
    .dma_wr (dma_wr),
    .fan_pwm (fan_pwm),
    .gpio_ad9625_i (gpio_i),
    .gpio_ad9625_o (gpio_o),
    .gpio_ad9625_t (gpio_t),
    .gpio_lcd_tri_o (gpio_lcd),
    .gpio_led_tri_o (gpio_led),
    .gpio_sw_tri_i (gpio_sw),
    .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),
    .iic_rstn (iic_rstn),
    .mdio_mdc (mdio_mdc),
    .mdio_mdio_io (mdio_mdio),
    .mgt_clk_clk_n (mgt_clk_n),
    .mgt_clk_clk_p (mgt_clk_p),
    .phy_rstn (phy_rstn),
    .rx_data_0_n (rx_data_0_n),
    .rx_data_0_p (rx_data_0_p),
    .rx_data_1_n (rx_data_1_n),
    .rx_data_1_p (rx_data_1_p),
    .rx_ref_clk_0 (rx_ref_clk_0),
    .rx_ref_clk_1 (rx_ref_clk_1),
    .rx_sync_0 (rx_sync_0),
    .rx_sync_1 (rx_sync_1),
    .rx_sysref (rx_sysref),
    .sgmii_rxn (sgmii_rxn),
    .sgmii_rxp (sgmii_rxp),
    .sgmii_txn (sgmii_txn),
    .sgmii_txp (sgmii_txp),
    .spdif (spdif),
    .spi_clk_i (1'b0),
    .spi_clk_o (spi_clk),
    .spi_csn_i (2'b11),
    .spi_csn_o ({spi_csn_1, spi_csn_0}),
    .spi_sdi_i (spi_miso),
    .spi_sdo_i (1'b0),
    .spi_sdo_o (spi_mosi),
    .sys_clk_n (sys_clk_n),
    .sys_clk_p (sys_clk_p),
    .sys_rst (sys_rst),
    .uart_sin (uart_sin),
    .uart_sout (uart_sout),
    .unc_int0 (1'b0),
    .unc_int1 (1'b0),
    .unc_int3 (1'b0),
    .unc_int4 (1'b0));

endmodule

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