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//
// Copyright 2011 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
module simple_gemac_wrapper
#(parameter RXFIFOSIZE=9,
parameter TXFIFOSIZE=9,
parameter RX_FLOW_CTRL=0)
(input clk125, input reset,
// GMII
output GMII_GTX_CLK, output GMII_TX_EN, output GMII_TX_ER, output [7:0] GMII_TXD,
input GMII_RX_CLK, input GMII_RX_DV, input GMII_RX_ER, input [7:0] GMII_RXD,
// Client FIFO Interfaces
input sys_clk,
output [35:0] rx_f36_data, output rx_f36_src_rdy, input rx_f36_dst_rdy,
input [35:0] tx_f36_data, input tx_f36_src_rdy, output tx_f36_dst_rdy,
// Wishbone Interface
input wb_clk, input wb_rst, input wb_stb, input wb_cyc, output wb_ack, input wb_we,
input [7:0] wb_adr, input [31:0] wb_dat_i, output [31:0] wb_dat_o,
// MIIM
inout mdio, output mdc,
output [31:0] debug);
wire clear = 0;
wire [7:0] rx_data, tx_data;
wire tx_clk, tx_valid, tx_error, tx_ack;
wire rx_clk, rx_valid, rx_error, rx_ack;
wire [47:0] ucast_addr, mcast_addr;
wire pass_ucast, pass_mcast, pass_bcast, pass_pause, pass_all;
wire pause_req;
wire pause_request_en, pause_respect_en;
wire [15:0] pause_time, pause_thresh, pause_time_req, rx_fifo_space;
wire [31:0] debug_state;
wire tx_reset, rx_reset;
reset_sync reset_sync_tx (.clk(tx_clk),.reset_in(reset),.reset_out(tx_reset));
reset_sync reset_sync_rx (.clk(rx_clk),.reset_in(reset),.reset_out(rx_reset));
simple_gemac simple_gemac
(.clk125(clk125), .reset(reset),
.GMII_GTX_CLK(GMII_GTX_CLK), .GMII_TX_EN(GMII_TX_EN),
.GMII_TX_ER(GMII_TX_ER), .GMII_TXD(GMII_TXD),
.GMII_RX_CLK(GMII_RX_CLK), .GMII_RX_DV(GMII_RX_DV),
.GMII_RX_ER(GMII_RX_ER), .GMII_RXD(GMII_RXD),
.pause_req(RX_FLOW_CTRL ? pause_req : 1'b0), .pause_time_req(RX_FLOW_CTRL ? pause_time_req : 16'd0),
.pause_respect_en(pause_respect_en),
.ucast_addr(ucast_addr), .mcast_addr(mcast_addr),
.pass_ucast(pass_ucast), .pass_mcast(pass_mcast), .pass_bcast(pass_bcast),
.pass_pause(pass_pause), .pass_all(pass_all),
.rx_clk(rx_clk), .rx_data(rx_data),
.rx_valid(rx_valid), .rx_error(rx_error), .rx_ack(rx_ack),
.tx_clk(tx_clk), .tx_data(tx_data),
.tx_valid(tx_valid), .tx_error(tx_error), .tx_ack(tx_ack),
.debug(debug_state)
);
simple_gemac_wb simple_gemac_wb
(.wb_clk(wb_clk), .wb_rst(wb_rst),
.wb_cyc(wb_cyc), .wb_stb(wb_stb), .wb_ack(wb_ack), .wb_we(wb_we),
.wb_adr(wb_adr), .wb_dat_i(wb_dat_i), .wb_dat_o(wb_dat_o),
.mdio(mdio), .mdc(mdc),
.ucast_addr(ucast_addr), .mcast_addr(mcast_addr),
.pass_ucast(pass_ucast), .pass_mcast(pass_mcast), .pass_bcast(pass_bcast),
.pass_pause(pass_pause), .pass_all(pass_all),
.pause_respect_en(pause_respect_en), .pause_request_en(pause_request_en),
.pause_time(pause_time), .pause_thresh(pause_thresh) );
// RX FIFO Chain
wire rx_ll_sof, rx_ll_eof, rx_ll_src_rdy, rx_ll_dst_rdy;
wire [7:0] rx_ll_data;
wire [18:0] rx_f19_data_int1, rx_f19_data_int2;
wire rx_f19_src_rdy_int1, rx_f19_dst_rdy_int1, rx_f19_src_rdy_int2, rx_f19_dst_rdy_int2;
wire [35:0] rx_f36_data_int;
wire rx_f36_src_rdy_int, rx_f36_dst_rdy_int;
rxmac_to_ll8 rx_adapt
(.clk(rx_clk), .reset(rx_reset), .clear(0),
.rx_data(rx_data), .rx_valid(rx_valid), .rx_error(rx_error), .rx_ack(rx_ack),
.ll_data(rx_ll_data), .ll_sof(rx_ll_sof), .ll_eof(rx_ll_eof), .ll_error(), // error also encoded in sof/eof
.ll_src_rdy(rx_ll_src_rdy), .ll_dst_rdy(rx_ll_dst_rdy));
ll8_to_fifo19 ll8_to_fifo19
(.clk(rx_clk), .reset(rx_reset), .clear(0),
.ll_data(rx_ll_data), .ll_sof(rx_ll_sof), .ll_eof(rx_ll_eof),
.ll_src_rdy(rx_ll_src_rdy), .ll_dst_rdy(rx_ll_dst_rdy),
.f19_data(rx_f19_data_int1), .f19_src_rdy_o(rx_f19_src_rdy_int1), .f19_dst_rdy_i(rx_f19_dst_rdy_int1));
fifo19_rxrealign fifo19_rxrealign
(.clk(rx_clk), .reset(rx_reset), .clear(0),
.datain(rx_f19_data_int1), .src_rdy_i(rx_f19_src_rdy_int1), .dst_rdy_o(rx_f19_dst_rdy_int1),
.dataout(rx_f19_data_int2), .src_rdy_o(rx_f19_src_rdy_int2), .dst_rdy_i(rx_f19_dst_rdy_int2) );
fifo19_to_fifo36 rx_fifo19_to_fifo36
(.clk(rx_clk), .reset(rx_reset), .clear(0),
.f19_datain(rx_f19_data_int2), .f19_src_rdy_i(rx_f19_src_rdy_int2), .f19_dst_rdy_o(rx_f19_dst_rdy_int2),
.f36_dataout(rx_f36_data_int), .f36_src_rdy_o(rx_f36_src_rdy_int), .f36_dst_rdy_i(rx_f36_dst_rdy_int) );
fifo_2clock_cascade #(.WIDTH(36), .SIZE(RXFIFOSIZE)) rx_2clk_fifo
(.wclk(rx_clk), .datain(rx_f36_data_int),
.src_rdy_i(rx_f36_src_rdy_int), .dst_rdy_o(rx_f36_dst_rdy_int), .space(rx_fifo_space),
.rclk(sys_clk), .dataout(rx_f36_data),
.src_rdy_o(rx_f36_src_rdy), .dst_rdy_i(rx_f36_dst_rdy), .occupied(), .arst(reset));
// TX FIFO Chain
wire tx_ll_sof, tx_ll_eof, tx_ll_src_rdy, tx_ll_dst_rdy;
wire [7:0] tx_ll_data;
wire [35:0] tx_f36_data_int1, tx_f36_data_int2;
wire tx_f36_src_rdy_int1, tx_f36_dst_rdy_int1, tx_f36_src_rdy_int2, tx_f36_dst_rdy_int2;
fifo_2clock_cascade #(.WIDTH(36), .SIZE(TXFIFOSIZE)) tx_2clk_fifo
(.wclk(sys_clk), .datain(tx_f36_data), .src_rdy_i(tx_f36_src_rdy), .dst_rdy_o(tx_f36_dst_rdy), .space(),
.rclk(tx_clk), .dataout(tx_f36_data_int1), .src_rdy_o(tx_f36_src_rdy_int1), .dst_rdy_i(tx_f36_dst_rdy_int1), .occupied(),
.arst(reset));
ethtx_realign ethtx_realign
(.clk(tx_clk), .reset(tx_reset), .clear(clear),
.datain(tx_f36_data_int1), .src_rdy_i(tx_f36_src_rdy_int1), .dst_rdy_o(tx_f36_dst_rdy_int1),
.dataout(tx_f36_data_int2), .src_rdy_o(tx_f36_src_rdy_int2), .dst_rdy_i(tx_f36_dst_rdy_int2) );
fifo36_to_ll8 fifo36_to_ll8
(.clk(tx_clk), .reset(tx_reset), .clear(clear),
.f36_data(tx_f36_data_int2), .f36_src_rdy_i(tx_f36_src_rdy_int2), .f36_dst_rdy_o(tx_f36_dst_rdy_int2),
.ll_data(tx_ll_data), .ll_sof(tx_ll_sof), .ll_eof(tx_ll_eof),
.ll_src_rdy(tx_ll_src_rdy), .ll_dst_rdy(tx_ll_dst_rdy));
ll8_to_txmac ll8_to_txmac
(.clk(tx_clk), .reset(tx_reset), .clear(clear),
.ll_data(tx_ll_data), .ll_sof(tx_ll_sof), .ll_eof(tx_ll_eof),
.ll_src_rdy(tx_ll_src_rdy), .ll_dst_rdy(tx_ll_dst_rdy),
.tx_data(tx_data), .tx_valid(tx_valid), .tx_error(tx_error), .tx_ack(tx_ack));
// Flow Control
generate
if(RX_FLOW_CTRL==1)
flow_ctrl_rx flow_ctrl_rx
(.pause_request_en(pause_request_en), .pause_time(pause_time), .pause_thresh(pause_thresh),
.rx_clk(rx_clk), .rx_reset(rx_reset), .rx_fifo_space(rx_fifo_space),
.tx_clk(tx_clk), .tx_reset(tx_reset), .pause_req(pause_req), .pause_time_req(pause_time_req));
endgenerate
wire [31:0] debug_tx, debug_rx;
assign debug_tx = { { tx_ll_data },
{ tx_ll_sof, tx_ll_eof, tx_ll_src_rdy, tx_ll_dst_rdy, 4'b0 },
{ tx_valid, tx_error, tx_ack, tx_f36_src_rdy_int1, tx_f36_dst_rdy_int1, tx_f36_data_int1[34:32]},
{ tx_data} };
assign debug_rx = { { rx_ll_data },
{ rx_ll_sof, rx_ll_eof, rx_ll_src_rdy, rx_ll_dst_rdy, 4'b0 },
{ rx_valid, rx_error, rx_ack, rx_f36_src_rdy_int, rx_f36_dst_rdy_int, rx_f36_data_int[34:32]},
{ rx_data} };
assign debug = debug_rx;
endmodule // simple_gemac_wrapper
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