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/*
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/*
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* $ptp_parser.v
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* $ptp_parser.v
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*
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*
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* Copyright (c) 2012, BBY&HW. All rights reserved.
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* Copyright (c) 2012, BABY&HW. All rights reserved.
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*
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*
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* This library is free software; you can redistribute it and/or
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* version 2.1 of the License, or (at your option) any later version.
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input int_sop,
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input int_sop,
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input int_eop,
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input int_eop,
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input [ 1:0] int_mod,
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input [ 1:0] int_mod,
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output reg ptp_found,
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output reg ptp_found,
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output reg [19:0] ptp_infor
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output reg [31:0] ptp_infor
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);
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);
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reg [31:0] int_data_d1;
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reg [31:0] int_data_d1;
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always @(posedge rst or posedge clk) begin
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always @(posedge rst or posedge clk) begin
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if (rst) begin
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if (rst) begin
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end
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end
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// packet parser: counter
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// packet parser: counter
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reg [ 9:0] int_cnt, bypass_ipv4_cnt, bypass_ipv6_cnt, bypass_udp_cnt, ptp_cnt;
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reg [ 9:0] int_cnt, bypass_ipv4_cnt, bypass_ipv6_cnt, bypass_udp_cnt, ptp_cnt;
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reg bypass_vlan, ptp_l2, bypass_mpls, bypass_ipv4, bypass_ipv6, found_udp, bypass_udp, ptp_l4, ptp_event;
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reg bypass_vlan, ptp_l2, bypass_mpls, bypass_ipv4, bypass_ipv6, found_udp, bypass_udp, ptp_l4, ptp_event;
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reg [ 3:0] ptp_msgid;
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reg [15:0] ptp_seqid;
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always @(posedge rst or posedge clk) begin
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always @(posedge rst or posedge clk) begin
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if (rst) begin
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if (rst) begin
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int_cnt <= 10'd0;
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int_cnt <= 10'd0;
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bypass_ipv4_cnt <= 10'd0;
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bypass_ipv4_cnt <= 10'd0;
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bypass_ipv6_cnt <= 10'd0;
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bypass_ipv6_cnt <= 10'd0;
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(int_data[31:16]==16'h013f || int_data[31:16]==16'h0140)) // udp_dest_port == ptp_event || ptp_general
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(int_data[31:16]==16'h013f || int_data[31:16]==16'h0140)) // udp_dest_port == ptp_event || ptp_general
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ptp_l4 <= 1'b1;
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ptp_l4 <= 1'b1;
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// check if it is PTP Event message
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// check if it is PTP Event message
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if (int_valid && (int_cnt==10'd3 || bypass_vlan && int_cnt==10'd4) && int_data[31:16]==16'h88F7 &&
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if (int_valid && (int_cnt==10'd3 || bypass_vlan && int_cnt==10'd4) && int_data[31:16]==16'h88F7 &&
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(int_data[11: 8]== 4'h0 || int_data[11:8]==4'h2)) // ptp_message_id == sync || delay_req
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(int_data[11: 8]>= 4'h0 && int_data[11:8]<=4'h7)) // ptp_message_id == ptp_event
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ptp_event <= 1'b1;
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ptp_event <= 1'b1;
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else if (int_valid && int_cnt==10'd4 && bypass_udp_cnt==10'd1 && ptp_l4 &&
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else if (int_valid && int_cnt==10'd4 && bypass_udp_cnt==10'd1 && ptp_l4 &&
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(int_data[11: 8]== 4'h0 || int_data[11:8]==4'h2)) // ptp_message_id == sync || delay_req
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(int_data[11: 8]>= 4'h0 && int_data[11:8]<=4'h7)) // ptp_message_id == ptp_event
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ptp_event <= 1'b1;
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ptp_event <= 1'b1;
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end
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end
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end
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end
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// ptp message
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// ptp message
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reg [31:0] ptp_data;
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reg [31:0] ptp_data;
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reg [ 3:0] ptp_msgid;
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reg [15:0] ptp_seqid;
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reg [11:0] ptp_cksum;
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always @(posedge rst or posedge clk) begin
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always @(posedge rst or posedge clk) begin
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if (rst) begin
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if (rst) begin
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ptp_data <= 32'd0;
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ptp_data <= 32'd0;
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ptp_msgid <= 4'd0;
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ptp_msgid <= 4'd0;
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ptp_seqid <= 16'd0;
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ptp_seqid <= 16'd0;
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ptp_cksum <= 12'd0;
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end
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end
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else if (int_valid && int_sop) begin
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else if (int_valid && int_sop) begin
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ptp_data <= 32'd0;
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ptp_data <= 32'd0;
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ptp_msgid <= 4'd0;
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ptp_msgid <= 4'd0;
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ptp_seqid <= 16'd0;
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ptp_seqid <= 16'd0;
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ptp_cksum <= 12'd0;
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end
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end
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else begin
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else begin
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// get PTP identification information as additional information to Timestamp
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// get PTP identification information as additional information to Timestamp
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// ptp message body
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// ptp message body
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if (int_valid && (ptp_l2 || (bypass_udp_cnt>=10'd2 && ptp_l4)))
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if (int_valid && (ptp_l2 || (bypass_udp_cnt>=10'd2 && ptp_l4)))
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if (int_valid && ptp_cnt==10'd1)
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if (int_valid && ptp_cnt==10'd1)
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ptp_msgid <= ptp_data[27:24];
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ptp_msgid <= ptp_data[27:24];
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// sequence id
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// sequence id
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if (int_valid && ptp_cnt==10'd8)
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if (int_valid && ptp_cnt==10'd8)
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ptp_seqid <= ptp_data[15:0];
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ptp_seqid <= ptp_data[15:0];
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// sum up clock id and source port id
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if (int_valid && ptp_cnt==10'd6)
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ptp_cksum <= ptp_data[31:24] + ptp_data[23:16] + ptp_data[15: 8] + ptp_data[ 7: 0] + ptp_cksum;
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if (int_valid && ptp_cnt==10'd7)
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ptp_cksum <= ptp_data[31:24] + ptp_data[23:16] + ptp_data[15: 8] + ptp_data[ 7: 0] + ptp_cksum;
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if (int_valid && ptp_cnt==10'd8)
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ptp_cksum <= ptp_data[31:24] + ptp_data[23:16] + ptp_cksum;
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end
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end
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end
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end
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// parser output
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// parser output
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always @(posedge rst or posedge clk) begin
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always @(posedge rst or posedge clk) begin
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if (rst) begin
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if (rst) begin
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ptp_found <= 1'b0;
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ptp_found <= 1'b0;
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ptp_infor <= 20'd0;
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ptp_infor <= 32'd0;
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end
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end
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else if (int_valid && int_sop) begin
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else if (int_valid && int_sop) begin
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ptp_found <= 1'b0;
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ptp_found <= 1'b0;
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ptp_infor <= 20'd0;
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ptp_infor <= 32'd0;
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end
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end
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else if (int_valid && ptp_cnt==10'd9) begin
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else if (int_valid && ptp_cnt==10'd9) begin
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ptp_found <= ptp_event;
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ptp_found <= ptp_event;
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ptp_infor <= {ptp_msgid, ptp_seqid}; // 4+16
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ptp_infor <= {ptp_msgid, ptp_cksum, ptp_seqid}; // 4+12+16
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end
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end
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end
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end
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endmodule
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endmodule
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No newline at end of file
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No newline at end of file
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