1 files changed, 0 insertions, 93 deletions
diff --git a/eth/rtl/verilog/elastic_buffer.v b/eth/rtl/verilog/elastic_buffer.v
deleted file mode 100644
index 56c821b7e..000000000
--- a/eth/rtl/verilog/elastic_buffer.v
+++ /dev/null
@@ -1,93 +0,0 @@
-
-
-module elastic_buffer
-  ( input rx_clk,
-    input tx_clk,
-    input rst,
-    
-    input [7:0] rxd,
-    input 	rx_dv,
-    input 	rx_er,
-    input 	crs,
-    input 	col,
-    
-    output [7:0] rxd_ret,
-    output 	 rx_dv_ret,
-    output 	 rx_er_ret,
-    output 	 crs_ret,
-    output 	 col_ret );
-
-   reg [3:0] 	 addr_wr,addr_wr_gray,awg_d1,awg_d2,addr_wr_gray_ret,awgr_d1,addr_wr_ungray,addr_rd;
-   
-   reg [11:0] 	 buffer [0:15];
-   integer 	 i;
-   initial
-     for(i=0;i<16;i=i+1)
-       buffer[i] <= 0;
-   
-   reg [7:0] 	 rxd_d1, rxd_d2;
-   reg 		 rx_dv_d1,rx_er_d1,crs_d1,col_d1, rx_dv_d2,rx_er_d2,crs_d2,col_d2;		 
-   wire 	 rx_dv_ret_adv;
-   reg 		 rx_dv_ontime;
-
-   always @(posedge rx_clk)
-     {col_d1,crs_d1,rx_er_d1,rx_dv_d1,rxd_d1} <= {col,crs,rx_er,rx_dv,rxd};
-
-   always @(posedge rx_clk)
-     {col_d2,crs_d2,rx_er_d2,rx_dv_d2,rxd_d2} <= {col_d1,crs_d1,rx_er_d1,rx_dv_d1,rxd_d1};
-   
-   always @(posedge rx_clk)
-     buffer[addr_wr] <= {col_d2,crs_d2,rx_er_d2,rx_dv_d1,rxd_d2};
-   
-   always @(posedge rx_clk or posedge rst)
-     if(rst) addr_wr <= 0;
-     else addr_wr <= addr_wr + 1;
-   
-   always @(posedge rx_clk)
-     begin
-	addr_wr_gray <= {addr_wr[3],^addr_wr[3:2],^addr_wr[2:1],^addr_wr[1:0]};
-	awg_d1 <= addr_wr_gray;
-	awg_d2 <= awg_d1;
-     end
-   
-   always @(posedge tx_clk)
-     begin
-	addr_wr_gray_ret <= awg_d2;
-	awgr_d1 <= addr_wr_gray_ret;
-	addr_wr_ungray <= {awgr_d1[3],^awgr_d1[3:2],^awgr_d1[3:1],^awgr_d1[3:0]};
-     end
-
-   wire [3:0] addr_delta = addr_rd-addr_wr_ungray;
-   reg 	[1:0] direction;
-   localparam retard = 2'd0;
-   localparam good = 2'd1;
-   localparam advance = 2'd2;
-   localparam wayoff = 2'd3;
-   
-   always @*
-     case(addr_delta)
-       4'd1, 4'd2, 4'd3, 4'd4, 4'd5 : direction <= retard;
-       4'd15, 4'd14, 4'd13, 4'd12, 4'd11 : direction <= advance;
-       4'd0 : direction <= good;
-       default : direction <= wayoff;
-     endcase // case(addr_delta)
-	
-   always @(posedge tx_clk or posedge rst)
-     if(rst)
-       addr_rd <= 0;
-     else if(rx_dv_ret_adv | rx_dv_ontime)
-       addr_rd <= addr_rd + 1;
-     else
-       case(direction)
-	 retard : addr_rd <= addr_rd;
-	 advance : addr_rd <= addr_rd + 2;
-	 good : addr_rd <= addr_rd + 1;
-	 wayoff : addr_rd <= addr_wr_ungray;
-       endcase // case(direction)
-   
-   assign     {col_ret,crs_ret,rx_er_ret,rx_dv_ret_adv,rxd_ret} = buffer[addr_rd];
-   always @(posedge tx_clk)
-     rx_dv_ontime <= rx_dv_ret_adv;
-
-   assign 	 rx_dv_ret = rx_dv_ontime;
-endmodule // elastic_buffer