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pluto_hdl_adi/library/xilinx/common/ad_lvds_in.v

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// ***************************************************************************
// ***************************************************************************
// Copyright 2014(c) Analog Devices, Inc.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
// - Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// - Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in
// the documentation and/or other materials provided with the
// distribution.
// - Neither the name of Analog Devices, Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
// - The use of this software may or may not infringe the patent rights
// of one or more patent holders. This license does not release you
// from the requirement that you obtain separate licenses from these
// patent holders to use this software.
// - Use of the software either in source or binary form, must be run
// on or directly connected to an Analog Devices Inc. component.
//
// THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED.
//
// IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY
// RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// ***************************************************************************
// ***************************************************************************
`timescale 1ns/100ps
module ad_lvds_in #(
// parameters
parameter SINGLE_ENDED = 0,
parameter DEVICE_TYPE = 0,
parameter IODELAY_ENABLE = 1,
parameter IODELAY_CTRL = 0,
parameter IODELAY_GROUP = "dev_if_delay_group") (
// data interface
input rx_clk,
input rx_data_in_p,
input rx_data_in_n,
output rx_data_p,
output rx_data_n,
// delay-data interface
input up_clk,
input up_dld,
input [ 4:0] up_dwdata,
output [ 4:0] up_drdata,
// delay-cntrl interface
input delay_clk,
input delay_rst,
output delay_locked);
// internal parameters
localparam VIRTEX7 = 0;
localparam VIRTEX6 = 1;
localparam ULTRASCALE_PLUS = 2;
localparam ULTRASCALE = 3;
// internal signals
wire rx_data_ibuf_s;
wire rx_data_idelay_s;
wire [ 8:0] up_drdata_s;
// delay controller
generate if (IODELAY_ENABLE == 1 && IODELAY_CTRL == 1) begin
if ((DEVICE_TYPE == ULTRASCALE_PLUS) || (DEVICE_TYPE == ULTRASCALE)) begin
(* IODELAY_GROUP = IODELAY_GROUP *)
IDELAYCTRL #(.SIM_DEVICE ("ULTRASCALE")) i_delay_ctrl (
.RST (delay_rst),
.REFCLK (delay_clk),
.RDY (delay_locked));
end
if ((DEVICE_TYPE == VIRTEX7) || (DEVICE_TYPE == VIRTEX6)) begin
(* IODELAY_GROUP = IODELAY_GROUP *)
IDELAYCTRL i_delay_ctrl (
.RST (delay_rst),
.REFCLK (delay_clk),
.RDY (delay_locked));
end
end else begin
assign delay_locked = 1'b1;
end
endgenerate
// receive data interface, ibuf -> idelay -> iddr
generate
if (SINGLE_ENDED == 1) begin
IBUF i_rx_data_ibuf (
.I (rx_data_in_p),
.O (rx_data_ibuf_s));
end else begin
IBUFDS i_rx_data_ibuf (
.I (rx_data_in_p),
.IB (rx_data_in_n),
.O (rx_data_ibuf_s));
end
endgenerate
// idelay
generate if (IODELAY_ENABLE == 1) begin
if (DEVICE_TYPE == VIRTEX6) begin
(* IODELAY_GROUP = IODELAY_GROUP *)
IODELAYE1 #(
.CINVCTRL_SEL ("FALSE"),
.DELAY_SRC ("I"),
.HIGH_PERFORMANCE_MODE ("TRUE"),
.IDELAY_TYPE ("VAR_LOADABLE"),
.IDELAY_VALUE (0),
.ODELAY_TYPE ("FIXED"),
.ODELAY_VALUE (0),
.REFCLK_FREQUENCY (200.0),
.SIGNAL_PATTERN ("DATA"))
i_rx_data_idelay (
.T (1'b1),
.CE (1'b0),
.INC (1'b0),
.CLKIN (1'b0),
.DATAIN (1'b0),
.ODATAIN (1'b0),
.CINVCTRL (1'b0),
.C (up_clk),
.IDATAIN (rx_data_ibuf_s),
.DATAOUT (rx_data_idelay_s),
.RST (up_dld),
.CNTVALUEIN (up_dwdata),
.CNTVALUEOUT (up_drdata));
end
if (DEVICE_TYPE == VIRTEX7) begin
(* IODELAY_GROUP = IODELAY_GROUP *)
IDELAYE2 #(
.CINVCTRL_SEL ("FALSE"),
.DELAY_SRC ("IDATAIN"),
.HIGH_PERFORMANCE_MODE ("FALSE"),
.IDELAY_TYPE ("VAR_LOAD"),
.IDELAY_VALUE (0),
.REFCLK_FREQUENCY (200.0),
.PIPE_SEL ("FALSE"),
.SIGNAL_PATTERN ("DATA"))
i_rx_data_idelay (
.CE (1'b0),
.INC (1'b0),
.DATAIN (1'b0),
.LDPIPEEN (1'b0),
.CINVCTRL (1'b0),
.REGRST (1'b0),
.C (up_clk),
.IDATAIN (rx_data_ibuf_s),
.DATAOUT (rx_data_idelay_s),
.LD (up_dld),
.CNTVALUEIN (up_dwdata),
.CNTVALUEOUT (up_drdata));
end
if (DEVICE_TYPE == ULTRASCALE) begin
assign up_drdata = up_drdata_s[8:4];
(* IODELAY_GROUP = IODELAY_GROUP *)
IDELAYE3 #(
.SIM_DEVICE ("ULTRASCALE"),
.DELAY_SRC ("IDATAIN"),
.DELAY_TYPE ("VAR_LOAD"),
.REFCLK_FREQUENCY (200.0),
.DELAY_FORMAT ("COUNT"))
i_rx_data_idelay (
.CASC_RETURN (1'b0),
.CASC_IN (1'b0),
.CASC_OUT (),
.CE (1'b0),
.CLK (up_clk),
.INC (1'b0),
.LOAD (up_dld),
.CNTVALUEIN ({up_dwdata, 4'd0}),
.CNTVALUEOUT (up_drdata_s),
.DATAIN (1'b0),
.IDATAIN (rx_data_ibuf_s),
.DATAOUT (rx_data_idelay_s),
.RST (1'b0),
.EN_VTC (~up_dld));
end
if (DEVICE_TYPE == ULTRASCALE_PLUS) begin
assign up_drdata = up_drdata_s[8:4];
(* IODELAY_GROUP = IODELAY_GROUP *)
IDELAYE3 #(
.SIM_DEVICE ("ULTRASCALE_PLUS_ES1"),
.DELAY_SRC ("IDATAIN"),
.DELAY_TYPE ("VAR_LOAD"),
.REFCLK_FREQUENCY (200.0),
.DELAY_FORMAT ("COUNT"))
i_rx_data_idelay (
.CASC_RETURN (1'b0),
.CASC_IN (1'b0),
.CASC_OUT (),
.CE (1'b0),
.CLK (up_clk),
.INC (1'b0),
.LOAD (up_dld),
.CNTVALUEIN ({up_dwdata, 4'd0}),
.CNTVALUEOUT (up_drdata_s),
.DATAIN (1'b0),
.IDATAIN (rx_data_ibuf_s),
.DATAOUT (rx_data_idelay_s),
.RST (1'b0),
.EN_VTC (~up_dld));
end
end else begin
assign rx_data_idelay_s = rx_data_ibuf_s;
assign up_drdata = 'h00;
end
endgenerate
// iddr
generate
if (DEVICE_TYPE == ULTRASCALE) begin
IDDRE1 #(
.DDR_CLK_EDGE ("SAME_EDGE"))
i_rx_data_iddr (
.R (1'b0),
.C (rx_clk),
.CB (~rx_clk),
.D (rx_data_idelay_s),
.Q1 (rx_data_p),
.Q2 (rx_data_n));
end
endgenerate
generate
if (DEVICE_TYPE == ULTRASCALE_PLUS) begin
IDDRE1 #(
.DDR_CLK_EDGE ("SAME_EDGE"))
i_rx_data_iddr (
.R (1'b0),
.C (rx_clk),
.CB (~rx_clk),
.D (rx_data_idelay_s),
.Q1 (rx_data_p),
.Q2 (rx_data_n));
end
endgenerate
generate
if ((DEVICE_TYPE == VIRTEX7) || (DEVICE_TYPE == VIRTEX6)) begin
IDDR #(
.DDR_CLK_EDGE ("SAME_EDGE"),
.INIT_Q1 (1'b0),
.INIT_Q2 (1'b0),
.SRTYPE ("ASYNC"))
i_rx_data_iddr (
.CE (1'b1),
.R (1'b0),
.S (1'b0),
.C (rx_clk),
.D (rx_data_idelay_s),
.Q1 (rx_data_p),
.Q2 (rx_data_n));
end
endgenerate
endmodule
// ***************************************************************************
// ***************************************************************************
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