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/////////////////////////////////////////////////////////////////////

////                                                             ////

////  WISHBONE DMA WISHBONE Interface                            ////

////                                                             ////

////                                                             ////

////  Author: Rudolf Usselmann                                   ////

////          rudi@asics.ws                                      ////

////                                                             ////

////                                                             ////

////  Downloaded from: http://www.opencores.org/cores/wb_dma/    ////

////                                                             ////

/////////////////////////////////////////////////////////////////////

////                                                             ////

//// Copyright (C) 2000-2002 Rudolf Usselmann                    ////

////                         www.asics.ws                        ////

////                         rudi@asics.ws                       ////

////                                                             ////

//// This source file may be used and distributed without        ////

//// restriction provided that this copyright statement is not   ////

//// removed from the file and that any derivative work contains ////

//// the original copyright notice and the associated disclaimer.////

////                                                             ////

////     THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY     ////

//// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED   ////

//// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS   ////

//// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR      ////

//// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,         ////

//// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES    ////

//// (INCLUDING, BUT NOT LIMITED TO, 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.                                 ////

////                                                             ////

/////////////////////////////////////////////////////////////////////

//  CVS Log

//

//  $Id: wb_dma_wb_if.v,v 1.1.1.1 2006-05-29 13:45:24 fukuchi Exp $

//

//  $Date: 2006-05-29 13:45:24 $

//  $Revision: 1.1.1.1 $

//  $Author: fukuchi $

//  $Locker:  $

//  $State: Exp $

//

// Change History:

//               $Log: not supported by cvs2svn $

//               Revision 1.3  2002/02/01 01:54:45  rudi

//

//               - Minor cleanup

//

//               Revision 1.2  2001/10/19 04:35:04  rudi

//

//               - Made the core parameterized

//

//               Revision 1.1  2001/07/29 08:57:02  rudi

//

//

//               1) Changed Directory Structure

//               2) Added restart signal (REST)

//

//               Revision 1.2  2001/06/05 10:22:37  rudi

//

//

//               - Added Support of up to 31 channels

//               - Added support for 2,4 and 8 priority levels

//               - Now can have up to 31 channels

//               - Added many configuration items

//               - Changed reset to async

//

//               Revision 1.1.1.1  2001/03/19 13:10:54  rudi

//               Initial Release

//

//

//

`include "wb_dma_defines.v"

module wb_dma_wb_if(clk, rst,

        // Wishbone

        wbs_data_i, wbs_data_o, wb_addr_i, wb_sel_i, wb_we_i, wb_cyc_i,

        wb_stb_i, wb_ack_o, wb_err_o, wb_rty_o,

        wbm_data_i, wbm_data_o, wb_addr_o, wb_sel_o, wb_we_o, wb_cyc_o,

        wb_stb_o, wb_ack_i, wb_err_i, wb_rty_i,

        // Master

        mast_go, mast_we, mast_adr, mast_din, mast_dout, mast_err,

        mast_drdy, mast_wait, pt_sel_i, mast_pt_in, mast_pt_out,

        // Slave

        slv_adr, slv_din, slv_dout, slv_re, slv_we,

        pt_sel_o, slv_pt_out, slv_pt_in

        );

parameter       rf_addr = 0;

input           clk, rst;

// --------------------------------------

// WISHBONE INTERFACE 

// Slave Interface

input   [31:0]   wbs_data_i;

output  [31:0]   wbs_data_o;

input   [31:0]   wb_addr_i;

input   [3:0]    wb_sel_i;

input           wb_we_i;

input           wb_cyc_i;

input           wb_stb_i;

output          wb_ack_o;

output          wb_err_o;

output          wb_rty_o;

// Master Interface

input   [31:0]   wbm_data_i;

output  [31:0]   wbm_data_o;

output  [31:0]   wb_addr_o;

output  [3:0]    wb_sel_o;

output          wb_we_o;

output          wb_cyc_o;

output          wb_stb_o;

input           wb_ack_i;

input           wb_err_i;

input           wb_rty_i;

// --------------------------------------

// MASTER INTERFACE 

input           mast_go;        // Perform a Master Cycle (as long as this

                                // line is asserted)

input           mast_we;        // Read/Write

input   [31:0]   mast_adr;       // Address for the transfer

input   [31:0]   mast_din;       // Internal Input Data

output  [31:0]   mast_dout;      // Internal Output Data

output          mast_err;       // Indicates an error has occurred

output          mast_drdy;      // Indicated that either data is available

                                // during a read, or that the master can accept

                                // the next data during a write

input           mast_wait;      // Tells the master to insert wait cycles

                                // because data can not be accepted/provided

// Pass Through Interface

input           pt_sel_i;       // Pass Through Mode Selected

input   [70:0]   mast_pt_in;     // Grouped WISHBONE inputs

output  [34:0]   mast_pt_out;    // Grouped WISHBONE outputs

// --------------------------------------

// Slave INTERFACE 

// This is the register File Interface

output  [31:0]   slv_adr;        // Slave Address

input   [31:0]   slv_din;        // Slave Input Data

output  [31:0]   slv_dout;       // Slave Output Data

output          slv_re;         // Slave Read Enable

output          slv_we;         // Slave Write Enable

// Pass through Interface

output          pt_sel_o;       // Pass Through Mode Active

output  [70:0]   slv_pt_out;     // Grouped WISHBONE out signals

input   [34:0]   slv_pt_in;      // Grouped WISHBONE in signals

////////////////////////////////////////////////////////////////////

//

// Modules

//

wb_dma_wb_mast  u0(

                .clk(           clk             ),

                .rst(           rst             ),

                .wb_data_i(     wbs_data_i      ),

                .wb_data_o(     wbs_data_o      ),

                .wb_addr_o(     wb_addr_o       ),

                .wb_sel_o(      wb_sel_o        ),

                .wb_we_o(       wb_we_o         ),

                .wb_cyc_o(      wb_cyc_o        ),

                .wb_stb_o(      wb_stb_o        ),

                .wb_ack_i(      wb_ack_i        ),

                .wb_err_i(      wb_err_i        ),

                .wb_rty_i(      wb_rty_i        ),

                .mast_go(       mast_go         ),

                .mast_we(       mast_we         ),

                .mast_adr(      mast_adr        ),

                .mast_din(      mast_din        ),

                .mast_dout(     mast_dout       ),

                .mast_err(      mast_err        ),

                .mast_drdy(     mast_drdy       ),

                .mast_wait(     mast_wait       ),

                .pt_sel(        pt_sel_i        ),

                .mast_pt_in(    mast_pt_in      ),

                .mast_pt_out(   mast_pt_out     )

                );

wb_dma_wb_slv #(rf_addr)        u1(

                .clk(           clk             ),

                .rst(           rst             ),

                .wb_data_i(     wbm_data_i      ),

                .wb_data_o(     wbm_data_o      ),

                .wb_addr_i(     wb_addr_i       ),

                .wb_sel_i(      wb_sel_i        ),

                .wb_we_i(       wb_we_i         ),

                .wb_cyc_i(      wb_cyc_i        ),

                .wb_stb_i(      wb_stb_i        ),

                .wb_ack_o(      wb_ack_o        ),

                .wb_err_o(      wb_err_o        ),

                .wb_rty_o(      wb_rty_o        ),

                .slv_adr(       slv_adr         ),

                .slv_din(       slv_din         ),

                .slv_dout(      slv_dout        ),

                .slv_re(        slv_re          ),

                .slv_we(        slv_we          ),

                .pt_sel(        pt_sel_o        ),

                .slv_pt_out(    slv_pt_out      ),

                .slv_pt_in(     slv_pt_in       )

                );

endmodule