Merge branch 'master' into next

2 files changed, 5 insertions, 42 deletions

diff --git a/fpga/usrp2/gpmc/gpmc.v b/fpga/usrp2/gpmc/gpmc.v
index 8ecae4daf..a5d4db466 100644
--- a/fpga/usrp2/gpmc/gpmc.v
+++ b/fpga/usrp2/gpmc/gpmc.v
@@ -49,18 +49,6 @@ module gpmc
    wire [15:0] 	  EM_D_fifo;
    wire [15:0] 	  EM_D_wb;
 
-   // these registers are used for the GPMC-to-FIFO interface
-   reg  [15:0]           em_d_reg;
-   reg  [ADDR_WIDTH:1]   em_a_reg;
-   reg  [1:0]            em_nbe_reg;
-   reg                   em_wait0_reg;
-   reg                   em_ncs4_reg;
-   reg                   em_ncs6_reg;
-   reg                   em_nwe_reg;
-   reg                   em_noe_reg;
-
-
-
    assign EM_D = ~EM_output_enable ? 16'bz : ~EM_NCS4 ? EM_D_fifo : EM_D_wb;
 
    // CS4 is RAM_2PORT for DATA PATH (high-speed data)
@@ -75,34 +63,9 @@ module gpmc
    wire [35:0] 	  tx_data, txb_data;
    wire 	  tx_src_rdy, tx_dst_rdy;
    wire 	  txb_src_rdy, txb_dst_rdy;
-   
-   // Register signals to prevent Sequence errors (S-errors) from occuring
-   always @(negedge EM_CLK or posedge arst) begin
-       if (arst) begin
-
-           em_d_reg     <= 0;
-           em_a_reg     <= 0;
-           em_nbe_reg   <= 0;
-           em_wait0_reg <= 0;
-           em_ncs4_reg  <= 0;
-           em_ncs6_reg  <= 0;
-           em_nwe_reg   <= 0;
-           em_noe_reg   <= 0;
-       end
-       else begin
-           em_d_reg     <= EM_D;
-           em_a_reg     <= EM_A;
-           em_nbe_reg   <= EM_NBE;
-           em_wait0_reg <= EM_WAIT0;
-           em_ncs4_reg  <= EM_NCS4;
-           em_ncs6_reg  <= EM_NCS6;
-           em_nwe_reg   <= EM_NWE;
-           em_noe_reg   <= EM_NOE;
-      end
-   end
 
    gpmc_to_fifo #(.ADDR_WIDTH(ADDR_WIDTH)) gpmc_to_fifo
-     (.EM_D(em_d_reg), .EM_A(em_a_reg), .EM_CLK(EM_CLK), .EM_WE(~em_ncs4_reg & ~em_nwe_reg),
+     (.EM_D(EM_D), .EM_A(EM_A), .EM_CLK(EM_CLK), .EM_WE(~EM_NCS4 & ~EM_NWE),
       .clk(fifo_clk), .reset(fifo_rst), .clear(clear_tx), .arst(fifo_rst | clear_tx | arst),
       .data_o(tx18_data), .src_rdy_o(tx18_src_rdy), .dst_rdy_i(tx18_dst_rdy),
       .have_space(tx_have_space));
diff --git a/fpga/usrp2/gpmc/gpmc_to_fifo.v b/fpga/usrp2/gpmc/gpmc_to_fifo.v
index 4aa55953a..cfc5aaa8b 100644
--- a/fpga/usrp2/gpmc/gpmc_to_fifo.v
+++ b/fpga/usrp2/gpmc/gpmc_to_fifo.v
@@ -70,9 +70,9 @@ module gpmc_to_fifo
             case(gpmc_state)
 
             GPMC_STATE_START: begin
-                if (EM_A == 0) begin
+                if (EM_A == 2) begin
                     gpmc_state <= GPMC_STATE_FILL;
-                    last_addr <= {EM_D[ADDR_WIDTH-2:0], 1'b0} - 1'b1;
+                    last_addr <= {EM_D[ADDR_WIDTH-2:0], 1'b0} - 1'b1 + 2;
                     next_gpmc_ptr <= gpmc_ptr + 1;
                 end
             end
@@ -116,14 +116,14 @@ module gpmc_to_fifo
         if (reset | clear) begin
             fifo_state <= FIFO_STATE_CLAIM;
             fifo_ptr <= 0;
-            counter <= 0;
+            counter <= 2;
         end
         else begin
             case(fifo_state)
 
             FIFO_STATE_CLAIM: begin
                 if (bram_available_to_empty) fifo_state <= FIFO_STATE_EMPTY;
-                counter <= 0;
+                counter <= 2;
             end
 
             FIFO_STATE_EMPTY: begin