Merge branch 'maint'

1 files changed, 148 insertions, 0 deletions

diff --git a/fpga/usrp3/top/x300/gige_phy/gige_phy_mdio.v b/fpga/usrp3/top/x300/gige_phy/gige_phy_mdio.v
new file mode 100644
index 000000000..a86fee447
--- /dev/null
+++ b/fpga/usrp3/top/x300/gige_phy/gige_phy_mdio.v
@@ -0,0 +1,148 @@
+
+module gige_phy_mdio
+  (input reset, 
+   input independent_clock,
+   input sfp_clk,
+   input SFP_RX_p, 
+   input SFP_RX_n,
+   output SFP_TX_p, 
+   output SFP_TX_n,
+   output gmii_clk,
+   input  [7:0] gmii_txd, 
+   input gmii_tx_en, 
+   input gmii_tx_er,
+   output [7:0] gmii_rxd, 
+   output gmii_rx_dv, 
+   output gmii_rx_er,
+   output [31:0] misc_debug,
+   output [15:0] int_data,
+   output [15:0] status_vector,
+   // MDIO signals
+   input [4:0] prtad,
+   input mdc,
+   input mdio_i,
+   output mdio_o,
+   output mdio_t
+   );
+
+
+   wire   mmcm_locked, mmcm_reset, resetdone, clkfbout;
+   wire   userclk, userclk2;
+   wire   txoutclk, txoutclk_bufg;
+   
+   assign gmii_clk = userclk2; // 125 MHz
+   
+   // Route txoutclk input through a BUFG
+   // FIXME is this really necessary?  It seems wasteful.
+   BUFG  bufg_txoutclk (.I (txoutclk), .O (txoutclk_bufg));
+
+   // This 62.5MHz clock is placed onto global clock routing and is then used
+   // for tranceiver TXUSRCLK/RXUSRCLK.
+   BUFG bufg_userclk (.I (clkout1), .O (userclk));
+
+   // This 125MHz clock is placed onto global clock routing and is then used
+   // to clock all Ethernet core logic.
+   BUFG bufg_userclk2 (.I (clkout0), .O (userclk2));
+
+   // The GT transceiver provides a 62.5MHz clock to the FPGA fabric.  This is 
+   // routed to an MMCM module where it is used to create phase and frequency
+   // related 62.5MHz and 125MHz clock sources
+   MMCME2_ADV # 
+     (.BANDWIDTH            ("OPTIMIZED"),
+      .CLKOUT4_CASCADE      ("FALSE"),
+      .COMPENSATION         ("ZHOLD"),
+      .STARTUP_WAIT         ("FALSE"),
+      .DIVCLK_DIVIDE        (1),
+      .CLKFBOUT_MULT_F      (16.000),
+      .CLKFBOUT_PHASE       (0.000),
+      .CLKFBOUT_USE_FINE_PS ("FALSE"),
+      .CLKOUT0_DIVIDE_F     (8.000),
+      .CLKOUT0_PHASE        (0.000),
+      .CLKOUT0_DUTY_CYCLE   (0.5),
+      .CLKOUT0_USE_FINE_PS  ("FALSE"),
+      .CLKOUT1_DIVIDE       (16),
+      .CLKOUT1_PHASE        (0.000),
+      .CLKOUT1_DUTY_CYCLE   (0.5),
+      .CLKOUT1_USE_FINE_PS  ("FALSE"),
+      .CLKIN1_PERIOD        (16.0),
+      .REF_JITTER1          (0.010)
+      ) mmcm_adv_inst 
+       (// Output clocks
+	.CLKFBOUT             (clkfbout),
+	.CLKFBOUTB            (),
+	.CLKOUT0              (clkout0),
+	.CLKOUT0B             (),
+	.CLKOUT1              (clkout1),
+	.CLKOUT1B             (),
+	.CLKOUT2              (),
+	.CLKOUT2B             (),
+	.CLKOUT3              (),
+	.CLKOUT3B             (),
+	.CLKOUT4              (),
+	.CLKOUT5              (),
+	.CLKOUT6              (),
+	// Input clock control
+	.CLKFBIN              (clkfbout),
+	.CLKIN1               (txoutclk_bufg),
+	.CLKIN2               (1'b0),
+	// Tied to always select the primary input clock
+	.CLKINSEL             (1'b1),
+	// Ports for dynamic reconfiguration
+	.DADDR                (7'h0),
+	.DCLK                 (1'b0),
+	.DEN                  (1'b0),
+	.DI                   (16'h0),
+	.DO                   (),
+	.DRDY                 (),
+	.DWE                  (1'b0),
+	// Ports for dynamic phase shift
+	.PSCLK                (1'b0),
+	.PSEN                 (1'b0),
+	.PSINCDEC             (1'b0),
+	.PSDONE               (),
+	// Other control and status signals
+	.LOCKED               (mmcm_locked),
+	.CLKINSTOPPED         (),
+	.CLKFBSTOPPED         (),
+	.PWRDWN               (1'b0),
+	.RST                  (mmcm_reset)
+	);
+
+   assign mmcm_reset = reset | ~resetdone;
+
+
+   gige_sfp_mdio_block gige_sfp_mdio_block 
+     (
+      .gtrefclk              (sfp_clk),
+      .txp                   (SFP_TX_p),
+      .txn                   (SFP_TX_n),
+      .rxp                   (SFP_RX_p),
+      .rxn                   (SFP_RX_n),
+      .txoutclk              (txoutclk),
+      .resetdone             (resetdone),
+      .mmcm_locked           (mmcm_locked),
+      .userclk               (userclk),
+      .userclk2              (userclk2),
+      .independent_clock_bufg(independent_clock),
+      .pma_reset             (reset),
+      .gmii_txd              (gmii_txd),
+      .gmii_tx_en            (gmii_tx_en),
+      .gmii_tx_er            (gmii_tx_er),
+      .gmii_rxd              (gmii_rxd),
+      .gmii_rx_dv            (gmii_rx_dv),
+      .gmii_rx_er            (gmii_rx_er),
+      .gmii_isolate          (), // Unused
+      .mdc                   (mdc),
+      .mdio_i                (mdio_i),
+      .mdio_o                (mdio_o),
+      .mdio_t                (mdio_t),
+      .phyad                 (prtad),
+      .configuration_vector  (5'b00000),
+      .configuration_valid   (1'b1), //default
+      .status_vector         (status_vector),
+      .reset                 (reset),
+      .signal_detect         (1'b1)
+      );
+
+
+endmodule // gige_phy