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

// Copyright (C) 2009 , Olivier Girard

//

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions

// are met:

//     * Redistributions of source code must retain the above copyright

//       notice, this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above copyright

//       notice, this list of conditions and the following disclaimer in the

//       documentation and/or other materials provided with the distribution.

//     * Neither the name of the authors nor the names of its contributors

//       may be used to endorse or promote products derived from this software

//       without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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

//

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

//

// *File Name: omsp_wakeup_cell.v

// 

// *Module Description:

//                       Generic Wakeup cell

//

// *Author(s):

//              - Olivier Girard,    olgirard@gmail.com

//

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

// $Rev: 103 $

// $LastChangedBy: olivier.girard $

// $LastChangedDate: 2011-03-05 15:44:48 +0100 (Sat, 05 Mar 2011) $

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

module  omsp_wakeup_cell (

// OUTPUTs

    wkup_out,                  // Wakup signal (asynchronous)

// INPUTs

    scan_clk,                  // Scan clock

    scan_mode,                 // Scan mode

    scan_rst,                  // Scan reset

    wkup_clear,                // Glitch free wakeup event clear

    wkup_event                 // Glitch free asynchronous wakeup event

);

// OUTPUTs

//=========

output         wkup_out;       // Wakup signal (asynchronous)

// INPUTs

//=========

input          scan_clk;       // Scan clock

input          scan_mode;      // Scan mode

input          scan_rst;       // Scan reset

input          wkup_clear;     // Glitch free wakeup event clear

input          wkup_event;     // Glitch free asynchronous wakeup event

//=============================================================================

// 1)  AND GATE

//=============================================================================

// Scan stuff for the ASIC mode

`ifdef ASIC

   wire wkup_rst;

   omsp_scan_mux scan_mux_rst (

                               .scan_mode    (scan_mode),

                               .data_in_scan (scan_rst),

                               .data_in_func (wkup_clear),

                               .data_out     (wkup_rst)

   );

   wire wkup_clk;

   omsp_scan_mux scan_mux_clk (

                               .scan_mode    (scan_mode),

                               .data_in_scan (scan_clk),

                               .data_in_func (wkup_event),

                               .data_out     (wkup_clk)

   );

`else

   wire wkup_rst  =  wkup_clear;

   wire wkup_clk  =  wkup_event;

`endif

// Wakeup capture

reg    wkup_out;

always @(posedge wkup_clk or posedge wkup_rst)

  if (wkup_rst) wkup_out <= 1'b0;

  else          wkup_out <= 1'b1;

endmodule // omsp_wakeup_cell