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`timescale 1ns/1ns
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`timescale 1ns/1ns
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module ptp_parser (
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module ptp_parser (
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input clk, rst,
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input clk, rst,
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input [31:0] ptp_data,
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input [31:0] int_data,
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input ptp_valid,
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input int_valid,
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input ptp_sop,
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input int_sop,
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input ptp_eop,
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input int_eop,
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input [ 1:0] ptp_mod,
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input [ 1:0] int_mod,
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input [31:0] ptp_time,
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input [31:0] sop_time,
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output reg ptp_found,
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output reg ptp_found,
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output reg [51:0] ptp_infor
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output reg [51:0] ptp_infor
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);
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);
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reg [31:0] ptp_data_d1;
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reg [31:0] int_data_d1;
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reg ptp_valid_d1;
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reg int_valid_d1;
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reg ptp_sop_d1;
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reg int_sop_d1;
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reg ptp_eop_d1;
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reg int_eop_d1;
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reg [ 1:0] ptp_mod_d1;
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reg [ 1:0] int_mod_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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ptp_data_d1 <= 32'h00000000;
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int_data_d1 <= 32'h00000000;
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ptp_valid_d1 <= 1'b0;
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int_valid_d1 <= 1'b0;
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ptp_sop_d1 <= 1'b0;
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int_sop_d1 <= 1'b0;
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ptp_eop_d1 <= 1'b0;
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int_eop_d1 <= 1'b0;
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ptp_mod_d1 <= 2'b00;
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int_mod_d1 <= 2'b00;
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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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if (ptp_valid) begin
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if (int_valid) begin
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ptp_data_d1 <= ptp_data;
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int_data_d1 <= int_data;
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ptp_mod_d1 <= ptp_mod;
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int_mod_d1 <= int_mod;
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end
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end
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ptp_valid_d1 <= ptp_valid;
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int_valid_d1 <= int_valid;
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ptp_sop_d1 <= ptp_sop;
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int_sop_d1 <= int_sop;
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ptp_eop_d1 <= ptp_eop;
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int_eop_d1 <= int_eop;
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end
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end
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end
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end
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reg [ 9:0] 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 ptp_vlan, ptp_ip, ptp_udp, ptp_port, ptp_event;
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reg bypass_vlan, ptp_l2, 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 [ 3:0] ptp_msgid;
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reg [15:0] ptp_seqid;
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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)
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if (rst) begin
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ptp_cnt <= 10'd0;
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int_cnt <= 10'd0;
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else
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bypass_ipv4_cnt <= 10'd0;
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if (ptp_valid && ptp_sop)
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bypass_udp_cnt <= 10'd0;
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ptp_cnt <= 10'd0;
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end
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else if (ptp_valid)
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else begin
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ptp_cnt <= ptp_cnt + 10'd1 - ptp_vlan;
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if (int_valid_d1 && int_sop_d1)
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int_cnt <= 10'd0;
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else if (int_valid_d1)
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int_cnt <= int_cnt + 10'd1 - bypass_vlan - (bypass_ipv4 || bypass_udp);
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if (int_valid_d1 && int_sop_d1)
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bypass_ipv4_cnt <= 10'd0;
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else if (int_valid_d1 && bypass_ipv4)
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bypass_ipv4_cnt <= bypass_ipv4_cnt + 10'd1;
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if (int_valid_d1 && int_sop_d1)
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bypass_udp_cnt <= 10'd0;
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else if (int_valid_d1 && bypass_udp)
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bypass_udp_cnt <= bypass_udp_cnt + 10'd1;
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end
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end
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end
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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_vlan <= 1'b0;
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bypass_vlan <= 1'b0;
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ptp_ip <= 1'b0;
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bypass_ipv4 <= 1'b0;
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ptp_udp <= 1'b0;
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found_udp <= 1'b0;
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ptp_port <= 1'b0;
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bypass_udp <= 1'b0;
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ptp_l2 <= 1'b0;
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ptp_l4 <= 1'b0;
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ptp_event <= 1'b0;
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ptp_event <= 1'b0;
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end
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else if (int_valid_d1 && int_sop_d1) begin
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bypass_vlan <= 1'b0;
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bypass_ipv4 <= 1'b0;
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found_udp <= 1'b0;
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bypass_udp <= 1'b0;
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ptp_l2 <= 1'b0;
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ptp_l4 <= 1'b0;
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ptp_event <= 1'b0;
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end
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else begin
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// bypass vlan
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// ether_type == cvlan
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if (int_valid_d1 && int_cnt==10'd3 && int_data_d1[31:16]==16'h8100)
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bypass_vlan <= 1'b1;
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else
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bypass_vlan <= 1'b0;
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// ether_type == svlan
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// TO BE ADDED HERE
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// bypass ipv4
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// ether_type == ip, ip_version == 4
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if (int_valid_d1 && int_cnt==10'd3 && bypass_ipv4_cnt==10'd0 &&
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int_data_d1[31:16]==16'h0800 && int_data_d1[15:12]==4'h4)
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bypass_ipv4 <= 1'b1;
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else if (int_valid_d1 && bypass_ipv4_cnt==10'd4)
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bypass_ipv4 <= 1'b0;
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// bypass ipv6
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// ether_type == ip, ip_version == 6
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// TO BE ADDED HERE
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// check if it is UDP
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// ipv4_protocol == udp
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if (int_valid_d1 && bypass_ipv4_cnt==10'd1 && int_data_d1[ 7: 0]== 8'h11)
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found_udp <= 1'b1;
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// ipv6_protocol == udp
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// TO BE ADDED HERE
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// bypass udp
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// ipv4_udp
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if (int_valid_d1 && bypass_ipv4_cnt==10'd4 && bypass_udp_cnt==10'd0 && found_udp)
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bypass_udp <= 1'b1;
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else if (int_valid_d1 && bypass_udp_cnt==10'd2)
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bypass_udp <= 1'b0;
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// ipv6_udp
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// TO BE ADDED HERE
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// check if it is L2 PTP
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// ether_type == ptp
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if (int_valid_d1 && int_cnt==10'd3 && int_data_d1[31:16]==16'h88F7)
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ptp_l2 <= 1'b1;
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// check if it is L4 PTP
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// ipv4_udp_dest_port == ptp_event
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if (int_valid_d1 && bypass_udp_cnt==10'd0 && bypass_udp && int_data_d1[31:16]==16'h013f)
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ptp_l4 <= 1'b1;
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// ipv6_udp_dest_port == ptp_event
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// TO BE ADDED HERE
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// check if it is PTP Event message
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if (int_valid_d1 && int_cnt==10'd3 && int_data_d1[31:16]==16'h88F7 && (int_data_d1[11: 8]== 4'h0 || int_data_d1[11:8]==4'h2))
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// ptp_message_id == sync || delay_req
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ptp_event <= 1'b1;
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else if (int_valid_d1 && int_cnt==10'd4 && bypass_udp_cnt==10'd1 && ptp_l4 && (int_data_d1[11: 8]== 4'h0 || int_data_d1[11:8]==4'h2))
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// ptp_message_id == sync || delay_req
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ptp_event <= 1'b1;
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end
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end
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always @(posedge rst or posedge clk) begin
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if (rst) begin
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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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end
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end
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else if (ptp_valid_d1 && ptp_sop_d1) begin
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else if (int_valid_d1 && int_sop_d1) begin
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ptp_vlan <= 1'b0;
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ptp_ip <= 1'b0;
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ptp_udp <= 1'b0;
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ptp_port <= 1'b0;
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ptp_event <= 1'b0;
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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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end
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end
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else begin
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else begin
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if (ptp_valid_d1 && ptp_cnt==10'd4) // ether_type == vlan
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// get PTP identification information as additional information to Timestamp
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ptp_vlan <= ( ptp_data_d1[31:16]==16'h8100);
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// message id
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else
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if (int_valid_d1 && int_cnt==10'd3 && int_data_d1[31:16]==16'h88F7)
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ptp_vlan <= 1'b0;
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ptp_msgid <= int_data_d1[11: 8];
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if (ptp_valid_d1 && ptp_cnt==10'd4) // ether_type == ip
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else if (int_valid_d1 && int_cnt==10'd4 && bypass_udp_cnt==10'd1 && ptp_l4)
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ptp_ip <= ( ptp_data_d1[31:16]==16'h0800);
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ptp_msgid <= int_data_d1[11: 8];
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if (ptp_valid_d1 && ptp_cnt==10'd6) // ip_type == udp
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// sequence id
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ptp_udp <= ( ptp_data_d1[ 7: 0]== 8'h11 && ptp_ip);
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if (int_valid_d1 && int_cnt==10'd11 && ptp_l2)
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if (ptp_valid_d1 && ptp_cnt==10'd10) // udp_dest_port == ptp_event
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ptp_seqid <= int_data_d1[31:16];
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ptp_port <= ( ptp_data_d1[31:16]==16'h013f && ptp_udp);
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else if (int_valid_d1 && int_cnt==10'd10 && ptp_l4)
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if (ptp_valid_d1 && ptp_cnt==10'd11) // ptp_message_id == sync || delay_req
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ptp_seqid <= int_data_d1[31:16];
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ptp_event <= ((ptp_data_d1[11: 8]== 4'h0 || ptp_data_d1[11:8]==4'h2) && ptp_port);
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if (ptp_valid_d1 && ptp_cnt==10'd11) // ptp_sequence_id
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ptp_msgid <= ptp_data_d1[11: 8];
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if (ptp_valid_d1 && ptp_cnt==10'd19) // ptp_sequence_id
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ptp_seqid <= ptp_data_d1[31:16];
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end
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end
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end
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end
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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 <= 52'd0;
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ptp_infor <= 52'd0;
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end
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end
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else if (ptp_valid_d1 && ptp_sop_d1) begin
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else if (int_valid_d1 && int_sop_d1) begin
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ptp_found <= 1'b0;
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ptp_found <= 1'b0;
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ptp_infor <= 52'd0;
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ptp_infor <= 52'd0;
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end
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end
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else if (ptp_valid_d1 && ptp_eop_d1) begin
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else if (int_valid_d1 && int_eop_d1) begin
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ptp_found <= ptp_event;
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ptp_found <= ptp_event;
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ptp_infor <= {ptp_seqid, ptp_msgid, ptp_time}; // 16+4+32
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ptp_infor <= {ptp_seqid, ptp_msgid, sop_time}; // 16+4+32
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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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ptp_found <= 1'b0;
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ptp_found <= 1'b0;
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ptp_infor <= 52'd0;
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ptp_infor <= 52'd0;
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end
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end
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