n230: WIP: Wired PHY status signals to ZPU

- Also shrunk RX buffer size

Author: achaudhari

usrp3/top/n230/n230.v

@@ -528,7 +528,7 @@ module n230 (
    // LED's on SFPs
    ///////////////////////////////////////////////////////////////////////
    wire [15:0] leds;
-   assign { LED_ACT1, LED_ACT2, LED_LINK1, LED_LINK2} = ~leds[3:0];
+   assign {LED_ACT1, LED_ACT2, LED_LINK1, LED_LINK2} = ~leds[3:0];
 
    ///////////////////////////////////////////////////////////////////////
    // SPI connections
@@ -617,18 +617,20 @@ module n230 (
    wire [7:0]  gmii_rxd0;
    wire        gmii_tx_en0, gmii_tx_er0;
    wire [7:0]  gmii_txd0;
+   wire [15:0] gmii_status0;
    wire        mdc0, mdio_in0, mdio_out0;
 
    wire        gmii_rx_dv1, gmii_rx_er1;
    wire [7:0]  gmii_rxd1;
    wire        gmii_tx_en1, gmii_tx_er1;
    wire [7:0]  gmii_txd1;
+   wire [15:0] gmii_status1;
    wire        mdc1, mdio_in1, mdio_out1;
 
 
    n230_core #(
       .EXTRA_TX_BUFF_SIZE(12),
-      .EXTRA_RX_BUFF_SIZE(12)
+      .EXTRA_RX_BUFF_SIZE(8)
    ) n230_core (
       //------------------------------------------------------------------
       // bus interfaces
@@ -705,6 +707,7 @@ module n230 (
       .gmii_rxd0(gmii_rxd0),
       .gmii_rx_dv0(gmii_rx_dv0),
       .gmii_rx_er0(gmii_rx_er0),
+      .gmii_status0(gmii_status0),
       .mdc0(mdc0),
       .mdio_in0(mdio_in0),
       .mdio_out0(mdio_out0),
@@ -719,6 +722,7 @@ module n230 (
       .gmii_rxd1(gmii_rxd1),
       .gmii_rx_dv1(gmii_rx_dv1),
       .gmii_rx_er1(gmii_rx_er1),
+      .gmii_status1(gmii_status1),
       .mdc1(mdc1),
       .mdio_in1(mdio_in1),
       .mdio_out1(mdio_out1),
@@ -765,7 +769,6 @@ module n230 (
    );
 
    wire        ge_phy_resetdone0, ge_phy_resetdone1;
-   wire [15:0] gmii_status0, gmii_status1;   // Debug info useful for chipscope use.
 
    OBUF pin_SFP0_TxDisable (.I(1'b0), .O(SFP0_TXDISABLE));
    OBUF pin_SFP1_TxDisable (.I(1'b0), .O(SFP1_TXDISABLE));

usrp3/top/n230/n230_core.v

@@ -109,6 +109,7 @@ module n230_core #(
    input [7:0] gmii_rxd0,
    input gmii_rx_dv0,
    input gmii_rx_er0,
+   input [15:0] gmii_status0,
    output mdc0,
    output mdio_in0,
    input mdio_out0,
@@ -123,6 +124,7 @@ module n230_core #(
    input [7:0] gmii_rxd1,
    input gmii_rx_dv1,
    input gmii_rx_er1,
+   input [15:0] gmii_status1,
    output mdc1,
    output mdio_in1,
    input mdio_out1,
@@ -759,6 +761,7 @@ module n230_core #(
       .gmii_rxd0(gmii_rxd0),
       .gmii_rx_dv0(gmii_rx_dv0),
       .gmii_rx_er0(gmii_rx_er0),
+      .gmii_status0(gmii_status0),
       .mdc0(mdc0),
       .mdio_in0(mdio_in0),
       .mdio_out0(mdio_out0),
@@ -772,6 +775,7 @@ module n230_core #(
       .gmii_rxd1(gmii_rxd1),
       .gmii_rx_dv1(gmii_rx_dv1),
       .gmii_rx_er1(gmii_rx_er1),
+      .gmii_status1(gmii_status1),
       .mdc1(mdc1),
       .mdio_in1(mdio_in1),
       .mdio_out1(mdio_out1),

usrp3/top/n230/zpu_subsystem.v

@@ -65,6 +65,7 @@ module zpu_subsystem #(
    input [7:0] gmii_rxd0,
    input gmii_rx_dv0,
    input gmii_rx_er0,
+   input [15:0] gmii_status0,
    output mdc0,
    output mdio_in0,
    input mdio_out0,
@@ -79,6 +80,7 @@ module zpu_subsystem #(
    input [7:0] gmii_rxd1,
    input gmii_rx_dv1,
    input gmii_rx_er1,
+   input [15:0] gmii_status1,
    output mdc1,
    output mdio_in1,
    input mdio_out1,
@@ -569,10 +571,18 @@ module zpu_subsystem #(
          RB_ZPU_COMPAT : rb_data = { PRODUCT_ID, COMPAT_MAJOR, COMPAT_MINOR };
          RB_ZPU_COUNTER : rb_data = { counter };
          // SFP Interface pins.
-         RB_ZPU_SFP_STATUS0: rb_data = {26'b0,SFP0_ModAbs_chgd,SFP0_TxFault_chgd,SFP0_RxLOS_chgd,
-              SFP0_ModAbs_reg2,SFP0_TxFault_reg2,SFP0_RxLOS_reg2};
-         RB_ZPU_SFP_STATUS1: rb_data = {26'b0,SFP1_ModAbs_chgd,SFP1_TxFault_chgd,SFP1_RxLOS_chgd,
-              SFP1_ModAbs_reg2,SFP1_TxFault_reg2,SFP1_RxLOS_reg2};
+         RB_ZPU_SFP_STATUS0: rb_data = {
+            gmii_status0,
+            10'h0,
+            SFP0_ModAbs_chgd,SFP0_TxFault_chgd,SFP0_RxLOS_chgd,
+            SFP0_ModAbs_reg2,SFP0_TxFault_reg2,SFP0_RxLOS_reg2
+         };
+         RB_ZPU_SFP_STATUS1: rb_data = {
+            gmii_status1,
+            10'h0,
+            SFP1_ModAbs_chgd,SFP1_TxFault_chgd,SFP1_RxLOS_chgd,
+            SFP1_ModAbs_reg2,SFP1_TxFault_reg2,SFP1_RxLOS_reg2
+         };
          // GIT HASH of RTL Source
          // [31:28] = 0xf - Unclean build
          // [27:0] - Abrieviated git hash for RTL.