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/*%W%	%G%*/
/*************************************************************************
 *
 * File Name    : phy_dpath
 * Author Name  : John Lo
 * Description  : This module is composed of some simple logic     
 * 		  (i.e. muxes, buffers, small gates) which ties    
 * 		  together the different physical interfaces GEM   
 * 		  supports.                                   
 * 		                                                   
 * 		  The MAC will accept a clock from the SERDES if   
 * 		  the external MII/GMII is not being used.  If it  
 * 		  is being used, the nclk_div2 clocks are buffered 
 * 		  and given to MAC.  Otherwise these are ignored.  
 * 		                                                   
 * 		  PCS will get its transmit clock from the refclk  
 * 		  pin.                                             
 * 
 * Parent Module: bmac_pcs_core or xmac_pcs_core
 * Interface Mod:  
 * Date Created : 8/30/01
 *
 * Copyright (c) 2003, Sun Microsystems, Inc. 
 * Sun Proprietary and Confidential   
 *
 * Modification :
 * 
 * Synthesis Notes: 
 * 
 *************************************************************************/

 
module phy_dpath(
phy_mode,
rxd_int,	// from PCS block
rx_dv_int,	// from PCS block
rx_er_int,	// from PCS block
crs_int,	// from PCS block	
col_int,	// from PCS block
gmii_rxd,	// from external gmii interface	
gmii_rx_dv,	// from external gmii interface	
gmii_rx_err,	// from external gmii interface	
gmii_crs,	// from external gmii interface	
gmii_col,	// from external gmii interface	
// outputs
mii_rxd,	// to MAC
mii_rx_dv,	// to MAC
mii_rx_err,	// to MAC
mii_crs,	// to MAC
mii_col 	// to MAC
                 );

		
   input		phy_mode;
   input [7:0] 		rxd_int;	// from PCS block
   input 		rx_dv_int;	// from PCS block
   input 		rx_er_int;	// from PCS block
   input 		crs_int;	// from PCS block	
   input 		col_int;	// from PCS block
   input  [7:0] 	gmii_rxd;	// from external gmii interface	
   input  		gmii_rx_dv;	// from external gmii interface	
   input  		gmii_rx_err;	// from external gmii interface	
   input  		gmii_crs;	// from external gmii interface	
   input  		gmii_col;	// from external gmii interface
// outputs
   output [7:0] 	mii_rxd;	// to MAC
   output 		mii_rx_dv;	// to MAC
   output 		mii_rx_err;	// to MAC
   output 		mii_crs;	// to MAC
   output 		mii_col;	// to MAC
   

// in vega design, 
   // phy_mode (pcs_bypass) == 1 -> use rgmii interface and disable internal pcs.
   // phy_mode (pcs_bypass) == 0 -> use internal pcs.

MUX2TO1 #(8) MUX_RXD_GMII (.dout(mii_rxd),.sel(phy_mode),
		.data0(rxd_int[7:0]),
		.data1(gmii_rxd[7:0]));
MUX2TO1 #(1) MUX_RX_DV_GMII (.dout(mii_rx_dv),.sel(phy_mode),
		.data0(rx_dv_int),
		.data1(gmii_rx_dv));
MUX2TO1 #(1) MUX_RX_ER_GMII (.dout(mii_rx_err),.sel(phy_mode),
		.data0(rx_er_int),
		.data1(gmii_rx_err));
MUX2TO1 #(1) MUX_CRS_GMII (.dout(mii_crs),.sel(phy_mode),
		.data0(crs_int),
		.data1(gmii_crs));
MUX2TO1 #(1) MUX_COL_GMII (.dout(mii_col),.sel(phy_mode),
		.data0(col_int),
		.data1(gmii_col));



endmodule