// SPDX-FileCopyrightText: 2021 Konrad Rzeszutek Wilk
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// SPDX-License-Identifier: Apache-2.0
`default_nettype none
`timescale 1ns/1ns
`ifdef FORMAL
`define MPRJ_IO_PADS 38
`endif
`ifdef VERILATOR
`define MPRJ_IO_PADS 38
`endif
module wrapper_sha1  (
`ifdef USE_POWER_PINS
    inout vdda1,	// User area 1 3.3V supply
    inout vdda2,	// User area 2 3.3V supply
    inout vssa1,	// User area 1 analog ground
    inout vssa2,	// User area 2 analog ground
    inout vccd1,	// User area 1 1.8V supply
    inout vccd2,	// User area 2 1.8v supply
    inout vssd1,	// User area 1 digital ground
    inout vssd2,	// User area 2 digital ground
`endif
    // interface as user_proj_example.v
    input wire wb_clk_i,
    input wire wb_rst_i,
    input wire wbs_stb_i, /* strobe */
    input wire wbs_cyc_i,
    input wire wbs_we_i,
    input wire [3:0] wbs_sel_i,
    input wire [31:0] wbs_dat_i,
    input wire [31:0] wbs_adr_i,
    output wire wbs_ack_o,
    output wire [31:0] wbs_dat_o,

    // Logic Analyzer Signals
    // only provide first 32 bits to reduce wiring congestion
    input  wire [31:0] la_data_in,
    output wire [31:0] la_data_out,
    input  wire [31:0] la_oenb,

    // IOs
    input  wire [`MPRJ_IO_PADS-1:0] io_in,
    output wire [`MPRJ_IO_PADS-1:0] io_out,
    output wire [`MPRJ_IO_PADS-1:0] io_oeb,

    // IRQ
    output wire [2:0] irq,

    // active input, only connect tristated outputs if this is high
    input wire active
);

    // all outputs must be tristated before being passed onto the project
    wire buf_wbs_ack_o;
    wire [31:0] buf_wbs_dat_o;
    wire [31:0] buf_la_data_out;
    wire [`MPRJ_IO_PADS-1:0] buf_io_out;
    wire [`MPRJ_IO_PADS-1:0] buf_io_oeb;
    wire [2:0] buf_irq;

`ifdef FORMAL
    // formal can't deal with z, so set all outputs to 0 if not active
    assign wbs_ack_o    = active ? buf_wbs_ack_o    : 1'b0;
    assign wbs_dat_o    = active ? buf_wbs_dat_o    : 32'b0;
    assign la_data_out  = active ? buf_la_data_out  : 32'b0;
    assign io_out       = active ? buf_io_out       : {`MPRJ_IO_PADS{1'b0}};
    assign io_oeb       = active ? buf_io_oeb       : {`MPRJ_IO_PADS{1'b0}};
    assign irq		= active ? buf_irq          : 3'b0;
`include "properties.v"
`else
    // tristate buffers
    assign wbs_ack_o    = active ? buf_wbs_ack_o    : 1'bz;
    assign wbs_dat_o    = active ? buf_wbs_dat_o    : 32'bz;
    assign la_data_out  = active ? buf_la_data_out  : 32'bz;
    assign io_out       = active ? buf_io_out       : {`MPRJ_IO_PADS{1'bz}};
    assign io_oeb       = active ? buf_io_oeb       : {`MPRJ_IO_PADS{1'bz}};
    assign irq		= active ? buf_irq          : 3'bz;
`endif

    // permanently set oeb so that outputs are always enabled: 0 is output, 1 is high-impedance
    assign buf_io_oeb = {`MPRJ_IO_PADS{1'b0}};

    wire reset = la_data_in[0];


    sha1_wb sha1_wishbone (
        .reset(reset),
        .chicken_bits_in(la_data_in[12:5]),
        .chicken_bits_out(buf_la_data_out[20:5]),
        .done(buf_io_out[8]),
        .irq(buf_irq[0]),
        .wb_clk_i(wb_clk_i),
        .wb_rst_i(wb_rst_i),
        .wbs_stb_i(wbs_stb_i),
        .wbs_cyc_i(wbs_cyc_i),
        .wbs_we_i(wbs_we_i),
        .wbs_sel_i(wbs_sel_i),
        .wbs_dat_i(wbs_dat_i),
        .wbs_adr_i(wbs_adr_i),
        .wbs_ack_o(buf_wbs_ack_o),
        .wbs_dat_o(buf_wbs_dat_o));

endmodule
`default_nettype wire