// ***************************************************************************
// ***************************************************************************
// Copyright 2014 - 2017 (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.
//
// ***************************************************************************
// ***************************************************************************

module axi_generic_adc (
  input adc_clk,
  output [NUM_OF_CHANNELS-1:0] adc_enable,
  input adc_dovf,

  input    s_axi_aclk,
  input    s_axi_aresetn,
  input    s_axi_awvalid,
  input   [15:0]  s_axi_awaddr,
  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,
  output    s_axi_arready,
  output    s_axi_rvalid,
  output  [ 1:0]  s_axi_rresp,
  output  [31:0]  s_axi_rdata,
  input    s_axi_rready,
  input   [ 2:0]  s_axi_awprot,
  input   [ 2:0]  s_axi_arprot

);

parameter NUM_OF_CHANNELS = 2;
parameter ID = 0;

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

wire adc_rst;
wire up_rstn;
wire up_clk;
wire [13:0] up_waddr_s;
wire [13:0] up_raddr_s;

// internal signals

wire        up_sel_s;
wire        up_wr_s;
wire [13:0] up_addr_s;
wire [31:0] up_wdata_s;
wire [31:0] up_rdata_s[0:NUM_OF_CHANNELS];
wire        up_rack_s[0:NUM_OF_CHANNELS];
wire        up_wack_s[0:NUM_OF_CHANNELS];

reg [31:0]  up_rdata_r;
reg         up_rack_r;
reg         up_wack_r;

assign up_clk = s_axi_aclk;
assign up_rstn = s_axi_aresetn;

integer j;
always @(*)
begin
  up_rdata_r = 'h00;
  up_rack_r = 'h00;
  up_wack_r = 'h00;
  for (j = 0; j <= NUM_OF_CHANNELS; 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

up_adc_common #(.ID(ID)) i_up_adc_common (
  .mmcm_rst (),
  .adc_clk (adc_clk),
  .adc_rst (adc_rst),
  .adc_r1_mode (),
  .adc_ddr_edgesel (),
  .adc_pin_mode (),
  .adc_status ('h00),
  .adc_sync_status (1'b1),
  .adc_status_ovf (adc_dovf),
  .adc_status_unf (1'b0),
  .adc_clk_ratio (32'd1),
  .adc_start_code (),
  .adc_sref_sync (),
  .adc_sync (),
  .up_adc_ce (),
  .up_status_pn_err (1'b0),
  .up_status_pn_oos (1'b0),
  .up_status_or (1'b0),
  .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),
  .up_usr_chanmax_out (),
  .up_usr_chanmax_in (8'd0),
  .up_adc_gpio_in (),
  .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[NUM_OF_CHANNELS]),
  .up_rreq (up_rreq_s),
  .up_raddr (up_raddr_s),
  .up_rdata (up_rdata_s[NUM_OF_CHANNELS]),
  .up_rack (up_rack_s[NUM_OF_CHANNELS]));

// 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));

generate
genvar i;

for (i = 0; i < NUM_OF_CHANNELS; i=i+1) begin
  up_adc_channel #(.CHANNEL_ID(i)) i_up_adc_channel (
    .adc_clk (adc_clk),
    .adc_rst (adc_rst),
    .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 (),
    .adc_pn_oos (),
    .adc_or (),
    .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

endmodule