// ***************************************************************************
// ***************************************************************************
// Copyright (C) 2022-2023 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 / 1ps

module axi_ad777x #(
  parameter   ID = 0
) (

  input           adc_dovf,
  input           clk_in,
  input           ready_in,
  output          sync_adc_mosi,
  input           sync_adc_miso,
  input   [ 3:0]  data_in,

  output          adc_enable_0,
  output          adc_enable_1,
  output          adc_enable_2,
  output          adc_enable_3,
  output          adc_enable_4,
  output          adc_enable_5,
  output          adc_enable_6,
  output          adc_enable_7,
  output          adc_valid_0,
  output          adc_valid_1,
  output          adc_valid_2,
  output          adc_valid_3,
  output          adc_valid_4,
  output          adc_valid_5,
  output          adc_valid_6,
  output          adc_valid_7,
  output  [31:0]  adc_data_0,
  output  [31:0]  adc_data_1,
  output  [31:0]  adc_data_2,
  output  [31:0]  adc_data_3,
  output  [31:0]  adc_data_4,
  output  [31:0]  adc_data_5,
  output  [31:0]  adc_data_6,
  output  [31:0]  adc_data_7,

  output          adc_clk,
  output          adc_reset,
  output          adc_valid,
  output  [ 7:0]  adc_crc_ch_mismatch,

  input           s_axi_aclk,
  input           s_axi_aresetn,
  input           s_axi_awvalid,
  input   [15:0]  s_axi_awaddr,
  input   [ 2:0]  s_axi_awprot,
  output          s_axi_awready,
  input           s_axi_wvalid,
  input   [31:0]  s_axi_wdata,
  input   [ 3:0]  s_axi_wstrb,
  output          s_axi_wready,
  output          s_axi_bvalid,
  output  [ 1:0]  s_axi_bresp,
  input           s_axi_bready,
  input           s_axi_arvalid,
  input   [15:0]  s_axi_araddr,
  input   [ 2:0]  s_axi_arprot,
  output          s_axi_arready,
  output          s_axi_rvalid,
  output  [ 1:0]  s_axi_rresp,
  output  [31:0]  s_axi_rdata,
  input           s_axi_rready
);

  // internal registers

  reg  [31:0] up_rdata = 'd0;
  reg         up_rack = 'd0;
  reg         up_wack = 'd0;
  reg [31:0]  up_rdata_r;
  reg         up_rack_r;
  reg         up_wack_r;

  // internal signals

  wire        adc_rst_s;
  wire        up_rstn;
  wire        up_clk;
  wire [13:0] up_waddr_s;
  wire [13:0] up_raddr_s;
  wire        adc_clk_s;
  wire        up_wreq_s;
  wire        up_rreq_s;
  wire [13:0] up_addr_s;
  wire [31:0] up_wdata_s;
  wire [31:0] up_rdata_s[0:8];
  wire  [8:0] up_rack_s;
  wire  [8:0] up_wack_s;
  wire  [7:0] adc_enable;
  wire  [4:0] adc_num_lanes;
  wire        adc_crc_enable;
  wire  [7:0] adc_status_header[0:7];
  wire  [7:0] adc_crc_err;

  assign up_clk = s_axi_aclk;
  assign up_rstn = s_axi_aresetn;
  assign adc_clk = adc_clk_s;
  assign adc_reset = adc_rst_s;

  assign adc_enable_0 = adc_enable[0];
  assign adc_enable_1 = adc_enable[1];
  assign adc_enable_2 = adc_enable[2];
  assign adc_enable_3 = adc_enable[3];
  assign adc_enable_4 = adc_enable[4];
  assign adc_enable_5 = adc_enable[5];
  assign adc_enable_6 = adc_enable[6];
  assign adc_enable_7 = adc_enable[7];
  assign adc_valid_0  = adc_valid;
  assign adc_valid_1  = adc_valid;
  assign adc_valid_2  = adc_valid;
  assign adc_valid_3  = adc_valid;
  assign adc_valid_4  = adc_valid;
  assign adc_valid_5  = adc_valid;
  assign adc_valid_6  = adc_valid;
  assign adc_valid_7  = adc_valid;
  assign adc_crc_ch_mismatch = adc_crc_err;

  integer j;

  always @(*) begin
    up_rdata_r = 'h00;
    up_rack_r = 'h00;
    up_wack_r = 'h00;
    for (j = 0; j <= 8; j=j+1) begin
      up_rack_r = up_rack_r | up_rack_s[j];
      up_wack_r = up_wack_r | up_wack_s[j];
      up_rdata_r = up_rdata_r | up_rdata_s[j];
    end
  end

  always @(negedge up_rstn or posedge up_clk) begin
    if (up_rstn == 0) begin
      up_rdata <= 'd0;
      up_rack <= 'd0;
      up_wack <= 'd0;
    end else begin
      up_rdata <= up_rdata_r;
      up_rack <= up_rack_r;
      up_wack <= up_wack_r;
    end
  end

  // adc channels

  generate
    genvar i;
    for (i = 0; i < 8; i=i+1) begin : ad777x_channels
      up_adc_channel #(
        .CHANNEL_ID(i)
      ) i_up_adc_channel (
        .adc_clk (adc_clk_s),
        .adc_rst (adc_rst_s),
        .adc_enable (adc_enable[i]),
        .adc_iqcor_enb (),
        .adc_dcfilt_enb (),
        .adc_dfmt_se (),
        .adc_dfmt_type (),
        .adc_dfmt_enable (),
        .adc_dcfilt_offset (),
        .adc_dcfilt_coeff (),
        .adc_iqcor_coeff_1 (),
        .adc_iqcor_coeff_2 (),
        .adc_pnseq_sel (),
        .adc_data_sel (),
        .adc_pn_err (1'b0),
        .adc_pn_oos (1'b0),
        .adc_or (1'b0),
        .adc_read_data ('d0),
        .adc_status_header(adc_status_header[i]),
        .adc_crc_err(adc_crc_err[i]),
        .up_adc_pn_err (),
        .up_adc_pn_oos (),
        .up_adc_or (),
        .up_usr_datatype_be (),
        .up_usr_datatype_signed (),
        .up_usr_datatype_shift (),
        .up_usr_datatype_total_bits (),
        .up_usr_datatype_bits (),
        .up_usr_decimation_m (),
        .up_usr_decimation_n (),
        .adc_usr_datatype_be (1'b0),
        .adc_usr_datatype_signed (1'b1),
        .adc_usr_datatype_shift (8'd0),
        .adc_usr_datatype_total_bits (8'd32),
        .adc_usr_datatype_bits (8'd32),
        .adc_usr_decimation_m (16'd1),
        .adc_usr_decimation_n (16'd1),
        .up_rstn (up_rstn),
        .up_clk (up_clk),
        .up_wreq (up_wreq_s),
        .up_waddr (up_waddr_s),
        .up_wdata (up_wdata_s),
        .up_wack (up_wack_s[i]),
        .up_rreq (up_rreq_s),
        .up_raddr (up_raddr_s),
        .up_rdata (up_rdata_s[i]),
        .up_rack (up_rack_s[i]));
    end
  endgenerate

  // adc interface

  axi_ad777x_if i_ad777x_if (
    .clk_in (clk_in),
    .ready_in (ready_in),
    .data_in (data_in),
    .adc_clk (adc_clk_s),
    .adc_valid (adc_valid),
    .sync_adc_mosi(sync_adc_mosi),
    .sync_adc_miso(sync_adc_miso),
    .adc_crc_ch_mismatch(adc_crc_err),
    .adc_num_lanes(adc_num_lanes),
    .adc_crc_enable(adc_crc_enable),
    .adc_data_0 (adc_data_0),
    .adc_data_1 (adc_data_1),
    .adc_data_2 (adc_data_2),
    .adc_data_3 (adc_data_3),
    .adc_data_4 (adc_data_4),
    .adc_data_5 (adc_data_5),
    .adc_data_6 (adc_data_6),
    .adc_data_7 (adc_data_7),
    .adc_status_0(adc_status_header[0]),
    .adc_status_1(adc_status_header[1]),
    .adc_status_2(adc_status_header[2]),
    .adc_status_3(adc_status_header[3]),
    .adc_status_4(adc_status_header[4]),
    .adc_status_5(adc_status_header[5]),
    .adc_status_6(adc_status_header[6]),
    .adc_status_7(adc_status_header[7]));

  // adc up common

  up_adc_common #(
    .ID(ID)
  ) i_up_adc_common (
    .mmcm_rst (),
    .adc_clk (adc_clk_s),
    .adc_rst (adc_rst_s),
    .adc_r1_mode (),
    .adc_ddr_edgesel (),
    .adc_pin_mode (),
    .adc_status ('h00),
    .adc_sync_status (1'b1),
    .adc_status_ovf (adc_dovf),
    .adc_clk_ratio (32'd1),
    .adc_start_code (),
    .adc_sref_sync (),
    .adc_sync (),
    .adc_ext_sync_arm(),
    .adc_ext_sync_disarm(),
    .adc_ext_sync_manual_req(),
    .adc_custom_control(),
    .adc_sdr_ddr_n(),
    .adc_symb_op(),
    .adc_symb_8_16b(),
    .adc_num_lanes(adc_num_lanes),
    .adc_crc_enable(adc_crc_enable),
    .up_pps_rcounter (32'b0),
    .up_pps_status (1'b0),
    .up_pps_irq_mask (),
    .up_adc_ce (),
    .up_status_pn_err (1'b0),
    .up_status_pn_oos (1'b0),
    .up_status_or (1'b0),
    .up_adc_r1_mode(),
    .up_drp_sel (),
    .up_drp_wr (),
    .up_drp_addr (),
    .up_drp_wdata (),
    .up_drp_rdata (32'd0),
    .up_drp_ready (1'd0),
    .up_drp_locked (1'd1),
    .adc_config_wr (),
    .adc_config_ctrl (),
    .adc_config_rd ('d0),
    .adc_ctrl_status ('d0),
    .up_usr_chanmax_out (),
    .up_usr_chanmax_in (8),
    .up_adc_gpio_in (32'b0),
    .up_adc_gpio_out (),
    .up_rstn (up_rstn),
    .up_clk (up_clk),
    .up_wreq (up_wreq_s),
    .up_waddr (up_waddr_s),
    .up_wdata (up_wdata_s),
    .up_wack (up_wack_s[8]),
    .up_rreq (up_rreq_s),
    .up_raddr (up_raddr_s),
    .up_rdata (up_rdata_s[8]),
    .up_rack (up_rack_s[8]));

  // up bus interface

  up_axi i_up_axi (
    .up_rstn (up_rstn),
    .up_clk (up_clk),
    .up_axi_awvalid (s_axi_awvalid),
    .up_axi_awaddr (s_axi_awaddr),
    .up_axi_awready (s_axi_awready),
    .up_axi_wvalid (s_axi_wvalid),
    .up_axi_wdata (s_axi_wdata),
    .up_axi_wstrb (s_axi_wstrb),
    .up_axi_wready (s_axi_wready),
    .up_axi_bvalid (s_axi_bvalid),
    .up_axi_bresp (s_axi_bresp),
    .up_axi_bready (s_axi_bready),
    .up_axi_arvalid (s_axi_arvalid),
    .up_axi_araddr (s_axi_araddr),
    .up_axi_arready (s_axi_arready),
    .up_axi_rvalid (s_axi_rvalid),
    .up_axi_rresp (s_axi_rresp),
    .up_axi_rdata (s_axi_rdata),
    .up_axi_rready (s_axi_rready),
    .up_wreq (up_wreq_s),
    .up_waddr (up_waddr_s),
    .up_wdata (up_wdata_s),
    .up_wack (up_wack),
    .up_rreq (up_rreq_s),
    .up_raddr (up_raddr_s),
    .up_rdata (up_rdata),
    .up_rack (up_rack));

  endmodule