axi_ad9361: Fix the interface for Intel devices

Use missing MIMO_ENABLE parameter, which will insert
and additional de-skew logic to prevent timing issues coming from
the clock skew differences of two or multiple AD9361.

library/axi_ad9361/altera/axi_ad9361_cmos_if.v

@@ -39,7 +39,11 @@ module axi_ad9361_cmos_if #(
 
   parameter   FPGA_TECHNOLOGY = 0,
   parameter   DAC_IODELAY_ENABLE = 0,
-  parameter   IO_DELAY_GROUP = "dev_if_delay_group") (
+  parameter   CLK_DESKEW = 0,
+
+  // Dummy parameters, required keep the code consistency(used on Xilinx)
+  parameter   IO_DELAY_GROUP = "dev_if_delay_group",
+  parameter   DELAY_REFCLK_FREQUENCY = 0) (
 
   // physical interface (receive)
 

library/axi_ad9361/altera/axi_ad9361_lvds_if.v

@@ -39,7 +39,11 @@ module axi_ad9361_lvds_if #(
 
   parameter   FPGA_TECHNOLOGY = 0,
   parameter   DAC_IODELAY_ENABLE = 0,
-  parameter   IO_DELAY_GROUP = "dev_if_delay_group") (
+  parameter   CLK_DESKEW = 0,
+
+  // Dummy parameters, required keep the code consistency(used on Xilinx)
+  parameter   IO_DELAY_GROUP = "dev_if_delay_group",
+  parameter   DELAY_REFCLK_FREQUENCY = 0) (
 
   // physical interface (receive)
 
@@ -122,7 +126,6 @@ module axi_ad9361_lvds_if #(
 
   reg                 up_drp_locked_m1 = 1'd0;
   reg                 up_drp_locked_int = 1'd0;
-  reg                 adc_r1_mode_n = 'd0;
   reg                 rx_r1_mode = 'd0;
   reg     [ 3:0]      rx_frame_d = 'd0;
   reg     [ 5:0]      rx_data_3 = 'd0;
@@ -131,9 +134,6 @@ module axi_ad9361_lvds_if #(
   reg                 adc_valid_p = 'd0;
   reg     [47:0]      adc_data_p = 'd0;
   reg                 adc_status_p = 'd0;
-  reg                 adc_valid_n = 'd0;
-  reg     [47:0]      adc_data_n = 'd0;
-  reg                 adc_status_n = 'd0;
   reg                 adc_valid_int = 'd0;
   reg     [47:0]      adc_data_int = 'd0;
   reg                 adc_status_int = 'd0;
@@ -144,11 +144,6 @@ module axi_ad9361_lvds_if #(
   reg     [ 5:0]      tx_data_1_p = 'd0;
   reg     [ 5:0]      tx_data_2_p = 'd0;
   reg     [ 5:0]      tx_data_3_p = 'd0;
-  reg     [ 3:0]      tx_frame_n = 'd0;
-  reg     [ 5:0]      tx_data_0_n = 'd0;
-  reg     [ 5:0]      tx_data_1_n = 'd0;
-  reg     [ 5:0]      tx_data_2_n = 'd0;
-  reg     [ 5:0]      tx_data_3_n = 'd0;
   reg     [ 3:0]      tx_frame = 'd0;
   reg     [ 5:0]      tx_data_0 = 'd0;
   reg     [ 5:0]      tx_data_1 = 'd0;
@@ -162,8 +157,6 @@ module axi_ad9361_lvds_if #(
   reg                 txnrx_up = 'd0;
   reg                 enable_int = 'd0;
   reg                 txnrx_int = 'd0;
-  reg                 enable_int_n = 'd0;
-  reg                 txnrx_int_n = 'd0;
   reg                 enable_int_p = 'd0;
   reg                 txnrx_int_p = 'd0;
 
@@ -203,6 +196,10 @@ module axi_ad9361_lvds_if #(
 
   // r1mode
 
+  generate if (CLK_DESKEW) begin
+
+    reg adc_r1_mode_n = 'd0;
+
     always @(negedge clk) begin
       adc_r1_mode_n <= adc_r1_mode;
     end
@@ -211,6 +208,15 @@ module axi_ad9361_lvds_if #(
       rx_r1_mode <= adc_r1_mode_n;
     end
 
+  end else begin /* CLK_DESKEW == 0 */
+
+    always @(posedge l_clk) begin
+      rx_r1_mode <= adc_r1_mode;
+    end
+
+  end
+endgenerate
+
   // frame check
 
   always @(posedge l_clk) begin
@@ -324,22 +330,39 @@ module axi_ad9361_lvds_if #(
 
   // transfer to common clock
 
+  generate if (CLK_DESKEW) begin
+
+    reg         adc_valid_n = 'd0;
+    reg [47:0]  adc_data_n = 'd0;
+    reg         adc_status_n = 'd0;
+
     always @(negedge l_clk) begin
       adc_valid_n <= adc_valid_p;
       adc_data_n <= adc_data_p;
       adc_status_n <= adc_status_p;
     end
 
-  assign adc_valid = adc_valid_int;
-  assign adc_data = adc_data_int;
-  assign adc_status = adc_status_int;
-
     always @(posedge clk) begin
       adc_valid_int <= adc_valid_n;
       adc_data_int <= adc_data_n;
       adc_status_int <= adc_status_n;
     end
 
+  end else begin /* CLK_DESKEW == 0 */
+
+    always @(posedge l_clk) begin
+      adc_valid_int <= adc_valid_p;
+      adc_data_int <= adc_data_p;
+      adc_status_int <= adc_status_p;
+    end
+
+  end
+  endgenerate
+
+  assign adc_valid = adc_valid_int;
+  assign adc_data = adc_data_int;
+  assign adc_status = adc_status_int;
+
   // dac-tx interface
 
   always @(posedge clk) begin
@@ -373,6 +396,14 @@ module axi_ad9361_lvds_if #(
 
   // transfer to local clock
 
+  generate if (CLK_DESKEW) begin
+
+    reg         tx_frame_n = 'd0;
+    reg [ 5:0]  tx_data_0_n = 'd0;
+    reg [ 5:0]  tx_data_1_n = 'd0;
+    reg [ 5:0]  tx_data_2_n = 'd0;
+    reg [ 5:0]  tx_data_3_n = 'd0;
+
     always @(negedge clk) begin
       tx_frame_n <= tx_frame_p;
       tx_data_0_n <= tx_data_0_p;
@@ -389,6 +420,19 @@ module axi_ad9361_lvds_if #(
       tx_data_3 <= tx_data_3_n;
     end
 
+  end else begin /* CLK_DESKEW == 0 */
+
+    always @(posedge l_clk) begin
+      tx_frame <= tx_frame_p;
+      tx_data_0 <= tx_data_0_p;
+      tx_data_1 <= tx_data_1_p;
+      tx_data_2 <= tx_data_2_p;
+      tx_data_3 <= tx_data_3_p;
+    end
+
+  end
+  endgenerate
+
   // tdd/ensm control
 
   always @(posedge up_clk) begin
@@ -420,6 +464,11 @@ module axi_ad9361_lvds_if #(
     end
   end
 
+  generate if (CLK_DESKEW) begin
+
+    reg enable_int_n = 'd0;
+    reg txnrx_int_n = 'd0;
+
     always @(negedge clk) begin
       enable_int_n <= enable_int;
       txnrx_int_n <= txnrx_int;
@@ -430,6 +479,16 @@ module axi_ad9361_lvds_if #(
       txnrx_int_p <= txnrx_int_n;
     end
 
+  end else begin /* CLK_DESKEW == 0 */
+
+    always @(posedge l_clk) begin
+      enable_int_p <= enable_int;
+      txnrx_int_p <= txnrx_int;
+    end
+
+  end
+  endgenerate
+
   generate
   if (FPGA_TECHNOLOGY == CYCLONE5) begin
   axi_ad9361_lvds_if_c5 i_axi_ad9361_lvds_if_c5 (