////////////////////////////////////////////////////////////////////////////
// SPDX-FileCopyrightText:  2021 , Dinesh Annayya
//
// 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
// SPDX-FileContributor: Modified by Dinesh Annayya <dinesha@opencores.org>
//////////////////////////////////////////////////////////////////////
////                                                              ////
////  Standalone User validation Test bench                       ////
////                                                              ////
////  This file is part of the riscduino project                  ////
////  https://github.com/dineshannayya/riscduino.git              ////
////                                                              ////
////  Description                                                 ////
////   This is a standalone test bench to validate the            ////
////   usb interfaface through External WB i/F.                   ////
////                                                              ////
////  To Do:                                                      ////
////    nothing                                                   ////
////                                                              ////
////  Author(s):                                                  ////
////      - Dinesh Annayya, dinesha@opencores.org                 ////
////                                                              ////
////  Revision :                                                  ////
////    0.1 - 09 Mar 2022, Dinesh A                               ////
////                                                              ////
//////////////////////////////////////////////////////////////////////

`default_nettype wire

`timescale 1 ns / 1 ps

`define TB_GLBL    user_usb_tb
`define USB_BFM    u_usb_agent

`include "usb_agents.v"
`include "test_control.v"
`include "usb1d_defines.v"
`include "usbd_files.v"

`include "sram_macros/sky130_sram_2kbyte_1rw1r_32x512_8.v"

module user_usb_tb;

parameter  USB_HPER   = 10.4167; // 48Mhz Half cycle
parameter  USER2_HPER = 2.6042; // 192Mhz Half cycle

	reg clock;
	reg user_clock2;
	reg usb_48mhz_clk;
	reg wb_rst_i;
	reg power1, power2;
	reg power3, power4;

        reg        wbd_ext_cyc_i;  // strobe/request
        reg        wbd_ext_stb_i;  // strobe/request
        reg [31:0] wbd_ext_adr_i;  // address
        reg        wbd_ext_we_i;  // write
        reg [31:0] wbd_ext_dat_i;  // data output
        reg [3:0]  wbd_ext_sel_i;  // byte enable

        wire [31:0] wbd_ext_dat_o;  // data input
        wire        wbd_ext_ack_o;  // acknowlegement
        wire        wbd_ext_err_o;  // error

	// User I/O
	wire [37:0] io_oeb;
	wire [37:0] io_out;
	wire [37:0] io_in;


	reg [1:0] spi_chip_no;

	wire gpio;
	wire [37:0] mprj_io;
	wire [7:0] mprj_io_0;
	reg        test_fail;
	reg [31:0] read_data;

        //-----------------------------------
        // Register Interface
        // ----------------------------------
        wire [31:0]   usbd_reg_addr;   // Register Address
       	wire 	      usbd_reg_rdwrn;  // 0 -> write, 1-> read
       	wire 	      usbd_reg_req;    //  Register Req
        wire [31:0]   usbd_reg_wdata;  // Register write data
        reg [31:0]    usbd_reg_rdata;  // Register Read Data
        reg           usbd_reg_ack = 1'b1;    // Register Ack

	reg  [31:0]   RegBank [0:15];

	// External clock is used by default.  Make this artificially fast for the
	// simulation.  Normally this would be a slow clock and the digital PLL
	// would be the fast clock.

	always #12.5 clock <= (clock === 1'b0);

	// 48Mhz clock generation
	always begin
          #USB_HPER     usb_48mhz_clk = 1'b0;
          #USB_HPER     usb_48mhz_clk = 1'b1;
        end

	// USER Clock generation
	always begin
          #USER2_HPER     user_clock2 = 1'b0;
          #USER2_HPER     user_clock2 = 1'b1;
        end

	initial begin
		clock = 0;
                wbd_ext_cyc_i ='h0;  // strobe/request
                wbd_ext_stb_i ='h0;  // strobe/request
                wbd_ext_adr_i ='h0;  // address
                wbd_ext_we_i  ='h0;  // write
                wbd_ext_dat_i ='h0;  // data output
                wbd_ext_sel_i ='h0;  // byte enable
	end
	initial begin
		wb_rst_i <= 1'b1;
		#100;
		wb_rst_i <= 1'b0;	    	// Release reset
	end

	`ifdef WFDUMP
	   initial begin
	   	$dumpfile("simx.vcd");
	   	$dumpvars(5, user_usb_tb);
	   end
       `endif

        always@(posedge wb_rst_i  or posedge usb_48mhz_clk)
	begin
	   if(wb_rst_i == 1'b1) begin
              usbd_reg_rdata = 'h0;
              usbd_reg_ack   = 'h0;
	   end else begin
	      if(usbd_reg_req && usbd_reg_rdwrn == 1'b0 && !usbd_reg_ack) begin
                 usbd_reg_ack = 'h1;
		 RegBank[usbd_reg_addr[5:2]] = usbd_reg_wdata;
		 $display("STATUS: Write Access Address : %x Data: %x",usbd_reg_addr[7:0],usbd_reg_wdata);
	      end else if(usbd_reg_req && usbd_reg_rdwrn == 1'b1 && !usbd_reg_ack) begin
                 usbd_reg_ack = 'h1;
		 usbd_reg_rdata = RegBank[usbd_reg_addr[5:2]];
		 $display("STATUS: Read Access Address : %x Data: %x",usbd_reg_addr[7:0],usbd_reg_rdata);
	      end else begin
                 usbd_reg_ack = 'h0;
	      end
	   end
	end

	initial begin
		$dumpon;

		#200; // Wait for reset removal
	        repeat (10) @(posedge clock);
		$display("Monitor: Standalone User Risc Boot Test Started");

		// Remove Wb Reset
		wb_user_core_write('h3080_0000,'h1);

                // Enable SPI Multi Functional Ports
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GPIO_MULTI_FUNC,'h400);

	        repeat (2) @(posedge clock);
		#1;
         
	        // Set USB clock : 192/4 = 48Mhz	
                wb_user_core_write(`ADDR_SPACE_WBHOST+`WBHOST_GLBL_CFG,{8'h82,4'h0,8'h0,4'h0,8'h01});

                // Remove the reset
		// Remove WB and SPI/UART Reset, Keep CORE under Reset
                wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_CFG0,'h03F);


		test_fail = 0;
	        repeat (200) @(posedge clock);
                wb_user_core_write(`ADDR_SPACE_WBHOST+`WBHOST_BANK_SEL,'h1000); // Change the Bank Sel 10


		//usb_test1;
		usb_test2;


		repeat (100) @(posedge clock);
			// $display("+1000 cycles");

          	if(test_control.error_count == 0) begin
		   `ifdef GL
	    	       $display("Monitor: USB Mode (GL) Passed");
		   `else
		       $display("Monitor: USB Mode (RTL) Passed");
		   `endif
	        end else begin
		    `ifdef GL
	    	        $display("Monitor: USB Mode (GL) Failed");
		    `else
		        $display("Monitor: USB Mode (RTL) Failed");
		    `endif
		 end
	    	$display("###################################################");
	        $finish;
	end

wire USER_VDD1V8 = 1'b1;
wire VSS = 1'b0;

user_project_wrapper u_top(
`ifdef USE_POWER_PINS
    .vccd1(USER_VDD1V8),	// User area 1 1.8V supply
    .vssd1(VSS),	// User area 1 digital ground
`endif
    .wb_clk_i    (clock       ),  // System clock
    .user_clock2 (user_clock2 ),  // Real-time clock
    .wb_rst_i    (wb_rst_i    ),  // Regular Reset signal

    .wbs_cyc_i   (wbd_ext_cyc_i),  // strobe/request
    .wbs_stb_i   (wbd_ext_stb_i),  // strobe/request
    .wbs_adr_i   (wbd_ext_adr_i),  // address
    .wbs_we_i    (wbd_ext_we_i),  // write
    .wbs_dat_i   (wbd_ext_dat_i),  // data output
    .wbs_sel_i   (wbd_ext_sel_i),  // byte enable

    .wbs_dat_o   (wbd_ext_dat_o),  // data input
    .wbs_ack_o   (wbd_ext_ack_o),  // acknowlegement

 
    // Logic Analyzer Signals
    .la_data_in      ('1) ,
    .la_data_out     (),
    .la_oenb         ('0),
 

    // IOs
    .io_in          (io_in)  ,
    .io_out         (io_out) ,
    .io_oeb         (io_oeb) ,

    .user_irq       () 

);
    usb_agent u_usb_agent();
    test_control test_control();

`ifndef GL // Drive Power for Hold Fix Buf
    // All standard cell need power hook-up for functionality work
    initial begin

    end
`endif  

// Drive USB Pads
//
tri usbd_txdp = (io_oeb[36] == 1'b0) ? io_out[36] : 1'bz;
tri usbd_txdn = (io_oeb[37] == 1'b0) ? io_out[37] : 1'bz;

assign io_in[36] = usbd_txdp;
assign io_in[37] = usbd_txdn;

// Full Speed Device Indication

pullup(usbd_txdp); 
//pulldown(usbd_txdn);

usb1d_top u_usb_top(

	.clk_i           (usb_48mhz_clk), 
	.rstn_i          (!wb_rst_i),
 
		// USB PHY Interface
	.usb_dp          (usbd_txdp), 
	.usb_dn          (usbd_txdn), 
 
	// USB Misc
	.phy_tx_mode     (1'b1), 
        .usb_rst         (),
 
	// Interrupts
	.dropped_frame   (), 
	.misaligned_frame(),
	.crc16_err       (),
 
	// Vendor Features
	.v_set_int       (), 
	.v_set_feature   (), 
	.wValue          (),
	.wIndex          (), 
	.vendor_data     (),
 
	// USB Status
	.usb_busy        (), 
	.ep_sel          (),
 
	// End point 1 configuration
	.ep1_cfg         (	`ISO  | `IN  | 14'd0256		),
	// End point 1 'OUT' FIFO i/f
	.ep1_dout        (					),
	.ep1_we          (					),
	.ep1_full        (		1'b0			),
	// End point 1 'IN' FIFO i/f
	.ep1_din         (		8'h0		        ),
	.ep1_re          (		   		        ),
	.ep1_empty       (		1'b0     		),
	.ep1_bf_en       (		1'b0			),
	.ep1_bf_size     (		7'h0			),
 
	// End point 2 configuration
	.ep2_cfg         (	`ISO  | `OUT | 14'd0256		),
	// End point 2 'OUT' FIFO i/f
	.ep2_dout        (				        ),
	.ep2_we          (				        ),
	.ep2_full        (		1'b0     		),
	// End point 2 'IN' FIFO i/f
	.ep2_din         (		8'h0			),
	.ep2_re          (					),
	.ep2_empty       (		1'b0			),
	.ep2_bf_en       (		1'b0			),
	.ep2_bf_size     (		7'h0			),
 
	// End point 3 configuration
	.ep3_cfg         (	`BULK | `IN  | 14'd064		),
	// End point 3 'OUT' FIFO i/f
	.ep3_dout        (					),
	.ep3_we          (					),
	.ep3_full        (		1'b0			),
	// End point 3 'IN' FIFO i/f
	.ep3_din         (		8'h0      		),
	.ep3_re          (		        		),
	.ep3_empty       (		1'b0    		),
	.ep3_bf_en       (		1'b0			),
	.ep3_bf_size     (		7'h0			),
 
	// End point 4 configuration
	.ep4_cfg         (	`BULK | `OUT | 14'd064		),
	// End point 4 'OUT' FIFO i/f
	.ep4_dout        (		        		),
	.ep4_we          (		        		),
	.ep4_full        (		1'b0     		),
	// End point 4 'IN' FIFO i/f
	.ep4_din         (		8'h0			),
	.ep4_re          (					),
	.ep4_empty       (		1'b0			),
	.ep4_bf_en       (		1'b0			),
	.ep4_bf_size     (		7'h0			),
 
	// End point 5 configuration
	.ep5_cfg         (	`INT  | `IN  | 14'd064		),
	// End point 5 'OUT' FIFO i/f
	.ep5_dout        (					),
	.ep5_we          (					),
	.ep5_full        (		1'b0			),
	// End point 5 'IN' FIFO i/f
	.ep5_din         (		8'h0     		),
	.ep5_re          (				        ),
	.ep5_empty       (		1'b0     		),
	.ep5_bf_en       (		1'b0			),
	.ep5_bf_size     (		7'h0			),
 
	// End point 6 configuration
	.ep6_cfg         (		14'h00			),
	// End point 6 'OUT' FIFO i/f
	.ep6_dout        (					),
	.ep6_we          (					),
	.ep6_full        (		1'b0			),
	// End point 6 'IN' FIFO i/f
	.ep6_din         (		8'h0			),
	.ep6_re          (					),
	.ep6_empty       (		1'b0			),
	.ep6_bf_en       (		1'b0			),
	.ep6_bf_size     (		7'h0			),
 
	// End point 7 configuration
	.ep7_cfg         (		14'h00			),
	// End point 7 'OUT' FIFO i/f
	.ep7_dout        (					),
	.ep7_we          (					),
	.ep7_full        (		1'b0			),
	// End point 7 'IN' FIFO i/f
	.ep7_din         (		8'h0			),
	.ep7_re          (					),
	.ep7_empty       (		1'b0			),
	.ep7_bf_en       (		1'b0			),
	.ep7_bf_size     (		7'h0			),
 
        // Register Interface
	.reg_addr        (usbd_reg_addr),
	.reg_rdwrn       (usbd_reg_rdwrn),
	.reg_req         (usbd_reg_req),
	.reg_wdata       (usbd_reg_wdata),
	.reg_rdata       (usbd_reg_rdata),
	.reg_ack         (usbd_reg_ack)
 
	);


//----------------------------------------------------
//  Task
// --------------------------------------------------
task test_err;
begin
     test_fail = 1;
end
endtask

task wb_user_core_write;
input [31:0] address;
input [31:0] data;
begin
  repeat (1) @(posedge clock);
  #1;
  wbd_ext_adr_i =address;  // address
  wbd_ext_we_i  ='h1;  // write
  wbd_ext_dat_i =data;  // data output
  wbd_ext_sel_i ='hF;  // byte enable
  wbd_ext_cyc_i ='h1;  // strobe/request
  wbd_ext_stb_i ='h1;  // strobe/request
  wait(wbd_ext_ack_o == 1);
  repeat (1) @(posedge clock);
  #1;
  wbd_ext_cyc_i ='h0;  // strobe/request
  wbd_ext_stb_i ='h0;  // strobe/request
  wbd_ext_adr_i ='h0;  // address
  wbd_ext_we_i  ='h0;  // write
  wbd_ext_dat_i ='h0;  // data output
  wbd_ext_sel_i ='h0;  // byte enable
  $display("STATUS: WB USER ACCESS WRITE Address : 0x%x, Data : 0x%x",address,data);
  repeat (2) @(posedge clock);
end
endtask

task  wb_user_core_read;
input [31:0] address;
output [31:0] data;
reg    [31:0] data;
begin
  repeat (1) @(posedge clock);
  #1;
  wbd_ext_adr_i =address;  // address
  wbd_ext_we_i  ='h0;  // write
  wbd_ext_dat_i ='0;  // data output
  wbd_ext_sel_i ='hF;  // byte enable
  wbd_ext_cyc_i ='h1;  // strobe/request
  wbd_ext_stb_i ='h1;  // strobe/request
  wait(wbd_ext_ack_o == 1);
  data  = wbd_ext_dat_o;  
  repeat (1) @(posedge clock);
  #1;
  wbd_ext_cyc_i ='h0;  // strobe/request
  wbd_ext_stb_i ='h0;  // strobe/request
  wbd_ext_adr_i ='h0;  // address
  wbd_ext_we_i  ='h0;  // write
  wbd_ext_dat_i ='h0;  // data output
  wbd_ext_sel_i ='h0;  // byte enable
  //$display("STATUS: WB USER ACCESS READ  Address : 0x%x, Data : 0x%x",address,data);
  repeat (2) @(posedge clock);
end
endtask

task  wb_user_core_read_check;
input [31:0] address;
output [31:0] data;
input [31:0] cmp_data;
reg    [31:0] data;
begin
  repeat (1) @(posedge clock);
  #1;
  wbd_ext_adr_i =address;  // address
  wbd_ext_we_i  ='h0;  // write
  wbd_ext_dat_i ='0;  // data output
  wbd_ext_sel_i ='hF;  // byte enable
  wbd_ext_cyc_i ='h1;  // strobe/request
  wbd_ext_stb_i ='h1;  // strobe/request
  wait(wbd_ext_ack_o == 1);
  data  = wbd_ext_dat_o;  
  repeat (1) @(posedge clock);
  #1;
  wbd_ext_cyc_i ='h0;  // strobe/request
  wbd_ext_stb_i ='h0;  // strobe/request
  wbd_ext_adr_i ='h0;  // address
  wbd_ext_we_i  ='h0;  // write
  wbd_ext_dat_i ='h0;  // data output
  wbd_ext_sel_i ='h0;  // byte enable
  if(data !== cmp_data) begin
     $display("ERROR : WB USER ACCESS READ  Address : 0x%x, Exd: 0x%x Rxd: 0x%x ",address,cmp_data,data);
     user_usb_tb.test_fail = 1;
  end else begin
     $display("STATUS: WB USER ACCESS READ  Address : 0x%x, Data : 0x%x",address,data);
  end
  repeat (2) @(posedge clock);
end
endtask


`ifdef GL

wire        wbd_spi_stb_i   = u_top.u_spi_master.wbd_stb_i;
wire        wbd_spi_ack_o   = u_top.u_spi_master.wbd_ack_o;
wire        wbd_spi_we_i    = u_top.u_spi_master.wbd_we_i;
wire [31:0] wbd_spi_adr_i   = u_top.u_spi_master.wbd_adr_i;
wire [31:0] wbd_spi_dat_i   = u_top.u_spi_master.wbd_dat_i;
wire [31:0] wbd_spi_dat_o   = u_top.u_spi_master.wbd_dat_o;
wire [3:0]  wbd_spi_sel_i   = u_top.u_spi_master.wbd_sel_i;

wire        wbd_sdram_stb_i = u_top.u_sdram_ctrl.wb_stb_i;
wire        wbd_sdram_ack_o = u_top.u_sdram_ctrl.wb_ack_o;
wire        wbd_sdram_we_i  = u_top.u_sdram_ctrl.wb_we_i;
wire [31:0] wbd_sdram_adr_i = u_top.u_sdram_ctrl.wb_addr_i;
wire [31:0] wbd_sdram_dat_i = u_top.u_sdram_ctrl.wb_dat_i;
wire [31:0] wbd_sdram_dat_o = u_top.u_sdram_ctrl.wb_dat_o;
wire [3:0]  wbd_sdram_sel_i = u_top.u_sdram_ctrl.wb_sel_i;

wire        wbd_uart_stb_i  = u_top.u_uart_i2c_usb.reg_cs;
wire        wbd_uart_ack_o  = u_top.u_uart_i2c_usb.reg_ack;
wire        wbd_uart_we_i   = u_top.u_uart_i2c_usb.reg_wr;
wire [7:0]  wbd_uart_adr_i  = u_top.u_uart_i2c_usb.reg_addr;
wire [7:0]  wbd_uart_dat_i  = u_top.u_uart_i2c_usb.reg_wdata;
wire [7:0]  wbd_uart_dat_o  = u_top.u_uart_i2c_usb.reg_rdata;
wire        wbd_uart_sel_i  = u_top.u_uart_i2c_usb.reg_be;

`endif

/**
`ifdef GL
//-----------------------------------------------------------------------------
// RISC IMEM amd DMEM Monitoring TASK
//-----------------------------------------------------------------------------

`define RISC_CORE  user_uart_tb.u_top.u_core.u_riscv_top

always@(posedge `RISC_CORE.wb_clk) begin
    if(`RISC_CORE.wbd_imem_ack_i)
          $display("RISCV-DEBUG => IMEM ADDRESS: %x Read Data : %x", `RISC_CORE.wbd_imem_adr_o,`RISC_CORE.wbd_imem_dat_i);
    if(`RISC_CORE.wbd_dmem_ack_i && `RISC_CORE.wbd_dmem_we_o)
          $display("RISCV-DEBUG => DMEM ADDRESS: %x Write Data: %x Resonse: %x", `RISC_CORE.wbd_dmem_adr_o,`RISC_CORE.wbd_dmem_dat_o);
    if(`RISC_CORE.wbd_dmem_ack_i && !`RISC_CORE.wbd_dmem_we_o)
          $display("RISCV-DEBUG => DMEM ADDRESS: %x READ Data : %x Resonse: %x", `RISC_CORE.wbd_dmem_adr_o,`RISC_CORE.wbd_dmem_dat_i);
end

`endif
**/
`include "tests/usb_test1.v"
`include "tests/usb_test2.v"

endmodule
`default_nettype wire