pluto_hdl_adi/library/common/up_clkgen.v

216 lines
6.8 KiB
Coq
Raw Normal View History

2014-02-28 19:26:22 +00:00
// ***************************************************************************
// ***************************************************************************
// Copyright 2011(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 up_clkgen (
// mmcm reset
mmcm_rst,
// drp interface
drp_clk,
drp_rst,
drp_sel,
drp_wr,
drp_addr,
drp_wdata,
drp_rdata,
drp_ready,
drp_locked,
// bus interface
up_rstn,
up_clk,
up_sel,
up_wr,
up_addr,
up_wdata,
up_rdata,
up_ack);
// parameters
parameter PCORE_VERSION = 32'h00040062;
parameter PCORE_ID = 0;
// mmcm reset
output mmcm_rst;
// drp interface
input drp_clk;
output drp_rst;
output drp_sel;
output drp_wr;
output [11:0] drp_addr;
output [15:0] drp_wdata;
input [15:0] drp_rdata;
input drp_ready;
input drp_locked;
// bus interface
input up_rstn;
input up_clk;
input up_sel;
input up_wr;
input [13:0] up_addr;
input [31:0] up_wdata;
output [31:0] up_rdata;
output up_ack;
// internal registers
reg [31:0] up_scratch = 'd0;
reg up_mmcm_resetn = 'd0;
reg up_resetn = 'd0;
reg up_drp_sel_t = 'd0;
reg up_drp_rwn = 'd0;
reg [11:0] up_drp_addr = 'd0;
reg [15:0] up_drp_wdata = 'd0;
reg up_ack = 'd0;
reg [31:0] up_rdata = 'd0;
// internal signals
wire up_sel_s;
wire up_wr_s;
wire up_preset_s;
wire up_mmcm_preset_s;
wire [15:0] up_drp_rdata_s;
wire up_drp_status_s;
wire up_drp_locked_s;
// decode block select
assign up_sel_s = (up_addr[13:8] == 6'h00) ? up_sel : 1'b0;
assign up_wr_s = up_sel_s & up_wr;
assign up_preset_s = ~up_resetn;
assign up_mmcm_preset_s = ~up_mmcm_resetn;
// processor write interface
always @(negedge up_rstn or posedge up_clk) begin
if (up_rstn == 0) begin
up_scratch <= 'd0;
up_mmcm_resetn <= 'd0;
up_resetn <= 'd0;
up_drp_sel_t <= 'd0;
up_drp_rwn <= 'd0;
up_drp_addr <= 'd0;
up_drp_wdata <= 'd0;
end else begin
if ((up_wr_s == 1'b1) && (up_addr[7:0] == 8'h02)) begin
up_scratch <= up_wdata;
end
if ((up_wr_s == 1'b1) && (up_addr[7:0] == 8'h10)) begin
up_mmcm_resetn <= up_wdata[1];
up_resetn <= up_wdata[0];
end
if ((up_wr_s == 1'b1) && (up_addr[7:0] == 8'h1c)) begin
up_drp_sel_t <= ~up_drp_sel_t;
up_drp_rwn <= up_wdata[28];
up_drp_addr <= up_wdata[27:16];
up_drp_wdata <= up_wdata[15:0];
end
end
end
// processor read interface
always @(negedge up_rstn or posedge up_clk) begin
if (up_rstn == 0) begin
up_ack <= 'd0;
up_rdata <= 'd0;
end else begin
up_ack <= up_sel_s;
if (up_sel_s == 1'b1) begin
case (up_addr[7:0])
8'h00: up_rdata <= PCORE_VERSION;
8'h01: up_rdata <= PCORE_ID;
8'h02: up_rdata <= up_scratch;
8'h10: up_rdata <= {30'd0, up_mmcm_resetn, up_resetn};
8'h17: up_rdata <= {31'd0, up_drp_locked_s};
8'h1c: up_rdata <= {3'd0, up_drp_rwn, up_drp_addr, up_drp_wdata};
8'h1d: up_rdata <= {14'd0, up_drp_locked_s, up_drp_status_s, up_drp_rdata_s};
default: up_rdata <= 0;
endcase
end else begin
up_rdata <= 32'd0;
end
end
end
// resets
ad_rst i_mmcm_rst_reg (.preset(up_mmcm_preset_s), .clk(drp_clk), .rst(mmcm_rst));
ad_rst i_drp_rst_reg (.preset(up_preset_s), .clk(drp_clk), .rst(drp_rst));
// drp control & status
up_drp_cntrl i_drp_cntrl (
.drp_clk (drp_clk),
.drp_rst (drp_rst),
.drp_sel (drp_sel),
.drp_wr (drp_wr),
.drp_addr (drp_addr),
.drp_wdata (drp_wdata),
.drp_rdata (drp_rdata),
.drp_ready (drp_ready),
.drp_locked (drp_locked),
.up_rstn (up_rstn),
.up_clk (up_clk),
.up_drp_sel_t (up_drp_sel_t),
.up_drp_rwn (up_drp_rwn),
.up_drp_addr (up_drp_addr),
.up_drp_wdata (up_drp_wdata),
.up_drp_rdata (up_drp_rdata_s),
.up_drp_status (up_drp_status_s),
.up_drp_locked (up_drp_locked_s));
endmodule
// ***************************************************************************
// ***************************************************************************