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Rev 365 → Rev 366

/trunk/rtl/verilog/eth_top.v
0,0 → 1,1190
//////////////////////////////////////////////////////////////////////
//// ////
//// ethmac.v ////
//// ////
//// This file is part of the Ethernet IP core project ////
//// http://www.opencores.org/project,ethmac ////
//// ////
//// Author(s): ////
//// - Igor Mohor (igorM@opencores.org) ////
//// ////
//// All additional information is available in the Readme.txt ////
//// file. ////
//// ////
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2001, 2002 Authors ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source 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 Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
//
// 2011-08-09 olof@opencores.org
// Renamed from eth_top.v to ethmac.v to better fit into the OpenCores
// Structure
//
// CVS Revision History
//
// $Log: not supported by cvs2svn $
// Revision 1.51 2005/02/21 11:13:17 igorm
// Defer indication fixed.
//
// Revision 1.50 2004/04/26 15:26:23 igorm
// - Bug connected to the TX_BD_NUM_Wr signal fixed (bug came in with the
// previous update of the core.
// - TxBDAddress is set to 0 after the TX is enabled in the MODER register.
// - RxBDAddress is set to r_TxBDNum<<1 after the RX is enabled in the MODER
// register. (thanks to Mathias and Torbjorn)
// - Multicast reception was fixed. Thanks to Ulrich Gries
//
// Revision 1.49 2003/11/12 18:24:59 tadejm
// WISHBONE slave changed and tested from only 32-bit accesss to byte access.
//
// Revision 1.48 2003/10/17 07:46:16 markom
// mbist signals updated according to newest convention
//
// Revision 1.47 2003/10/06 15:43:45 knguyen
// Update RxEnSync only when mrxdv_pad_i is inactive (LOW).
//
// Revision 1.46 2003/01/30 13:30:22 tadejm
// Defer indication changed.
//
// Revision 1.45 2003/01/22 13:49:26 tadejm
// When control packets were received, they were ignored in some cases.
//
// Revision 1.44 2003/01/21 12:09:40 mohor
// When receiving normal data frame and RxFlow control was switched on, RXB
// interrupt was not set.
//
// Revision 1.43 2002/11/22 01:57:06 mohor
// Rx Flow control fixed. CF flag added to the RX buffer descriptor. RxAbort
// synchronized.
//
// Revision 1.42 2002/11/21 00:09:19 mohor
// TPauseRq synchronized to tx_clk.
//
// Revision 1.41 2002/11/19 18:13:49 mohor
// r_MiiMRst is not used for resetting the MIIM module. wb_rst used instead.
//
// Revision 1.40 2002/11/19 17:34:25 mohor
// AddressMiss status is connecting to the Rx BD. AddressMiss is identifying
// that a frame was received because of the promiscous mode.
//
// Revision 1.39 2002/11/18 17:31:55 mohor
// wb_rst_i is used for MIIM reset.
//
// Revision 1.38 2002/11/14 18:37:20 mohor
// r_Rst signal does not reset any module any more and is removed from the design.
//
// Revision 1.37 2002/11/13 22:25:36 tadejm
// All modules are reset with wb_rst instead of the r_Rst. Exception is MII module.
//
// Revision 1.36 2002/10/18 17:04:20 tadejm
// Changed BIST scan signals.
//
// Revision 1.35 2002/10/11 13:36:58 mohor
// Typo error fixed. (When using Bist)
//
// Revision 1.34 2002/10/10 16:49:50 mohor
// Signals for WISHBONE B3 compliant interface added.
//
// Revision 1.33 2002/10/10 16:29:30 mohor
// BIST added.
//
// Revision 1.32 2002/09/20 17:12:58 mohor
// CsMiss added. When address between 0x800 and 0xfff is accessed within
// Ethernet Core, error acknowledge is generated.
//
// Revision 1.31 2002/09/12 14:50:17 mohor
// CarrierSenseLost bug fixed when operating in full duplex mode.
//
// Revision 1.30 2002/09/10 10:35:23 mohor
// Ethernet debug registers removed.
//
// Revision 1.29 2002/09/09 13:03:13 mohor
// Error acknowledge is generated when accessing BDs and RST bit in the
// MODER register (r_Rst) is set.
//
// Revision 1.28 2002/09/04 18:44:10 mohor
// Signals related to the control frames connected. Debug registers reg1, 2, 3, 4
// connected.
//
// Revision 1.27 2002/07/25 18:15:37 mohor
// RxAbort changed. Packets received with MRxErr (from PHY) are also
// aborted.
//
// Revision 1.26 2002/07/17 18:51:50 mohor
// EXTERNAL_DMA removed. External DMA not supported.
//
// Revision 1.25 2002/05/03 10:15:50 mohor
// Outputs registered. Reset changed for eth_wishbone module.
//
// Revision 1.24 2002/04/22 14:15:42 mohor
// Wishbone signals are registered when ETH_REGISTERED_OUTPUTS is
// selected in eth_defines.v
//
// Revision 1.23 2002/03/25 13:33:53 mohor
// md_padoen_o changed to md_padoe_o. Signal was always active high, just
// name was incorrect.
//
// Revision 1.22 2002/02/26 16:59:54 mohor
// Small fixes for external/internal DMA missmatches.
//
// Revision 1.21 2002/02/26 16:21:00 mohor
// Interrupts changed in the top file
//
// Revision 1.20 2002/02/18 10:40:17 mohor
// Small fixes.
//
// Revision 1.19 2002/02/16 14:03:44 mohor
// Registered trimmed. Unused registers removed.
//
// Revision 1.18 2002/02/16 13:06:33 mohor
// EXTERNAL_DMA used instead of WISHBONE_DMA.
//
// Revision 1.17 2002/02/16 07:15:27 mohor
// Testbench fixed, code simplified, unused signals removed.
//
// Revision 1.16 2002/02/15 13:49:39 mohor
// RxAbort is connected differently.
//
// Revision 1.15 2002/02/15 11:38:26 mohor
// Changes that were lost when updating from 1.11 to 1.14 fixed.
//
// Revision 1.14 2002/02/14 20:19:11 billditt
// Modified for Address Checking,
// addition of eth_addrcheck.v
//
// Revision 1.13 2002/02/12 17:03:03 mohor
// HASH0 and HASH1 registers added. Registers address width was
// changed to 8 bits.
//
// Revision 1.12 2002/02/11 09:18:22 mohor
// Tx status is written back to the BD.
//
// Revision 1.11 2002/02/08 16:21:54 mohor
// Rx status is written back to the BD.
//
// Revision 1.10 2002/02/06 14:10:21 mohor
// non-DMA host interface added. Select the right configutation in eth_defines.
//
// Revision 1.9 2002/01/23 10:28:16 mohor
// Link in the header changed.
//
// Revision 1.8 2001/12/05 15:00:16 mohor
// RX_BD_NUM changed to TX_BD_NUM (holds number of TX descriptors
// instead of the number of RX descriptors).
//
// Revision 1.7 2001/12/05 10:45:59 mohor
// ETH_RX_BD_ADR register deleted. ETH_RX_BD_NUM is used instead.
//
// Revision 1.6 2001/10/19 11:24:29 mohor
// Number of addresses (wb_adr_i) minimized.
//
// Revision 1.5 2001/10/19 08:43:51 mohor
// eth_timescale.v changed to timescale.v This is done because of the
// simulation of the few cores in a one joined project.
//
// Revision 1.4 2001/10/18 12:07:11 mohor
// Status signals changed, Adress decoding changed, interrupt controller
// added.
//
// Revision 1.3 2001/09/24 15:02:56 mohor
// Defines changed (All precede with ETH_). Small changes because some
// tools generate warnings when two operands are together. Synchronization
// between two clocks domains in eth_wishbonedma.v is changed (due to ASIC
// demands).
//
// Revision 1.2 2001/08/15 14:03:59 mohor
// Signal names changed on the top level for easier pad insertion (ASIC).
//
// Revision 1.1 2001/08/06 14:44:29 mohor
// A define FPGA added to select between Artisan RAM (for ASIC) and Block Ram (For Virtex).
// Include files fixed to contain no path.
// File names and module names changed ta have a eth_ prologue in the name.
// File eth_timescale.v is used to define timescale
// All pin names on the top module are changed to contain _I, _O or _OE at the end.
// Bidirectional signal MDIO is changed to three signals (Mdc_O, Mdi_I, Mdo_O
// and Mdo_OE. The bidirectional signal must be created on the top level. This
// is done due to the ASIC tools.
//
// Revision 1.2 2001/08/02 09:25:31 mohor
// Unconnected signals are now connected.
//
// Revision 1.1 2001/07/30 21:23:42 mohor
// Directory structure changed. Files checked and joind together.
//
//
//
//
 
 
`include "ethmac_defines.v"
`include "timescale.v"
 
 
module eth_top
(
// WISHBONE common
wb_clk_i, wb_rst_i, wb_dat_i, wb_dat_o,
 
// WISHBONE slave
wb_adr_i, wb_sel_i, wb_we_i, wb_cyc_i, wb_stb_i, wb_ack_o, wb_err_o,
 
// WISHBONE master
m_wb_adr_o, m_wb_sel_o, m_wb_we_o,
m_wb_dat_o, m_wb_dat_i, m_wb_cyc_o,
m_wb_stb_o, m_wb_ack_i, m_wb_err_i,
 
`ifdef ETH_WISHBONE_B3
m_wb_cti_o, m_wb_bte_o,
`endif
 
//TX
mtx_clk_pad_i, mtxd_pad_o, mtxen_pad_o, mtxerr_pad_o,
 
//RX
mrx_clk_pad_i, mrxd_pad_i, mrxdv_pad_i, mrxerr_pad_i, mcoll_pad_i, mcrs_pad_i,
// MIIM
mdc_pad_o, md_pad_i, md_pad_o, md_padoe_o,
 
int_o
 
// Bist
`ifdef ETH_BIST
,
// debug chain signals
mbist_si_i, // bist scan serial in
mbist_so_o, // bist scan serial out
mbist_ctrl_i // bist chain shift control
`endif
 
);
 
 
parameter TX_FIFO_DATA_WIDTH = `ETH_TX_FIFO_DATA_WIDTH;
parameter TX_FIFO_DEPTH = `ETH_TX_FIFO_DEPTH;
parameter TX_FIFO_CNT_WIDTH = `ETH_TX_FIFO_CNT_WIDTH;
parameter RX_FIFO_DATA_WIDTH = `ETH_RX_FIFO_DATA_WIDTH;
parameter RX_FIFO_DEPTH = `ETH_RX_FIFO_DEPTH;
parameter RX_FIFO_CNT_WIDTH = `ETH_RX_FIFO_CNT_WIDTH;
 
 
// WISHBONE common
input wb_clk_i; // WISHBONE clock
input wb_rst_i; // WISHBONE reset
input [31:0] wb_dat_i; // WISHBONE data input
output [31:0] wb_dat_o; // WISHBONE data output
output wb_err_o; // WISHBONE error output
 
// WISHBONE slave
input [11:2] wb_adr_i; // WISHBONE address input
input [3:0] wb_sel_i; // WISHBONE byte select input
input wb_we_i; // WISHBONE write enable input
input wb_cyc_i; // WISHBONE cycle input
input wb_stb_i; // WISHBONE strobe input
output wb_ack_o; // WISHBONE acknowledge output
 
// WISHBONE master
output [31:0] m_wb_adr_o;
output [3:0] m_wb_sel_o;
output m_wb_we_o;
input [31:0] m_wb_dat_i;
output [31:0] m_wb_dat_o;
output m_wb_cyc_o;
output m_wb_stb_o;
input m_wb_ack_i;
input m_wb_err_i;
 
wire [29:0] m_wb_adr_tmp;
 
`ifdef ETH_WISHBONE_B3
output [2:0] m_wb_cti_o; // Cycle Type Identifier
output [1:0] m_wb_bte_o; // Burst Type Extension
`endif
 
// Tx
input mtx_clk_pad_i; // Transmit clock (from PHY)
output [3:0] mtxd_pad_o; // Transmit nibble (to PHY)
output mtxen_pad_o; // Transmit enable (to PHY)
output mtxerr_pad_o; // Transmit error (to PHY)
 
// Rx
input mrx_clk_pad_i; // Receive clock (from PHY)
input [3:0] mrxd_pad_i; // Receive nibble (from PHY)
input mrxdv_pad_i; // Receive data valid (from PHY)
input mrxerr_pad_i; // Receive data error (from PHY)
 
// Common Tx and Rx
input mcoll_pad_i; // Collision (from PHY)
input mcrs_pad_i; // Carrier sense (from PHY)
 
// MII Management interface
input md_pad_i; // MII data input (from I/O cell)
output mdc_pad_o; // MII Management data clock (to PHY)
output md_pad_o; // MII data output (to I/O cell)
output md_padoe_o; // MII data output enable (to I/O cell)
 
output int_o; // Interrupt output
 
// Bist
`ifdef ETH_BIST
input mbist_si_i; // bist scan serial in
output mbist_so_o; // bist scan serial out
input [`ETH_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i; // bist chain shift control
`endif
 
wire [31:0] wb_dbg_dat0;
 
wire [7:0] r_ClkDiv;
wire r_MiiNoPre;
wire [15:0] r_CtrlData;
wire [4:0] r_FIAD;
wire [4:0] r_RGAD;
wire r_WCtrlData;
wire r_RStat;
wire r_ScanStat;
wire NValid_stat;
wire Busy_stat;
wire LinkFail;
wire [15:0] Prsd; // Read Status Data (data read from the PHY)
wire WCtrlDataStart;
wire RStatStart;
wire UpdateMIIRX_DATAReg;
 
wire TxStartFrm;
wire TxEndFrm;
wire TxUsedData;
wire [7:0] TxData;
wire TxRetry;
wire TxAbort;
wire TxUnderRun;
wire TxDone;
 
 
reg WillSendControlFrame_sync1;
reg WillSendControlFrame_sync2;
reg WillSendControlFrame_sync3;
reg RstTxPauseRq;
 
reg TxPauseRq_sync1;
reg TxPauseRq_sync2;
reg TxPauseRq_sync3;
reg TPauseRq;
 
initial
begin
$display(" *********************************************");
$display(" =============================================");
$display(" eth_top.v will be removed shortly.");
$display(" Please use ethmac.v as top level file instead");
$display(" =============================================");
$display(" *********************************************");
end
// Connecting Miim module
eth_miim miim1
(
.Clk(wb_clk_i),
.Reset(wb_rst_i),
.Divider(r_ClkDiv),
.NoPre(r_MiiNoPre),
.CtrlData(r_CtrlData),
.Rgad(r_RGAD),
.Fiad(r_FIAD),
.WCtrlData(r_WCtrlData),
.RStat(r_RStat),
.ScanStat(r_ScanStat),
.Mdi(md_pad_i),
.Mdo(md_pad_o),
.MdoEn(md_padoe_o),
.Mdc(mdc_pad_o),
.Busy(Busy_stat),
.Prsd(Prsd),
.LinkFail(LinkFail),
.Nvalid(NValid_stat),
.WCtrlDataStart(WCtrlDataStart),
.RStatStart(RStatStart),
.UpdateMIIRX_DATAReg(UpdateMIIRX_DATAReg)
);
 
 
 
 
wire [3:0] RegCs; // Connected to registers
wire [31:0] RegDataOut; // Multiplexed to wb_dat_o
wire r_RecSmall; // Receive small frames
wire r_LoopBck; // Loopback
wire r_TxEn; // Tx Enable
wire r_RxEn; // Rx Enable
 
wire MRxDV_Lb; // Muxed MII receive data valid
wire MRxErr_Lb; // Muxed MII Receive Error
wire [3:0] MRxD_Lb; // Muxed MII Receive Data
wire Transmitting; // Indication that TxEthMAC is transmitting
wire r_HugEn; // Huge packet enable
wire r_DlyCrcEn; // Delayed CRC enabled
wire [15:0] r_MaxFL; // Maximum frame length
 
wire [15:0] r_MinFL; // Minimum frame length
wire ShortFrame;
wire DribbleNibble; // Extra nibble received
wire ReceivedPacketTooBig; // Received packet is too big
wire [47:0] r_MAC; // MAC address
wire LoadRxStatus; // Rx status was loaded
wire [31:0] r_HASH0; // HASH table, lower 4 bytes
wire [31:0] r_HASH1; // HASH table, upper 4 bytes
wire [7:0] r_TxBDNum; // Receive buffer descriptor number
wire [6:0] r_IPGT; //
wire [6:0] r_IPGR1; //
wire [6:0] r_IPGR2; //
wire [5:0] r_CollValid; //
wire [15:0] r_TxPauseTV; // Transmit PAUSE value
wire r_TxPauseRq; // Transmit PAUSE request
 
wire [3:0] r_MaxRet; //
wire r_NoBckof; //
wire r_ExDfrEn; //
wire r_TxFlow; // Tx flow control enable
wire r_IFG; // Minimum interframe gap for incoming packets
 
wire TxB_IRQ; // Interrupt Tx Buffer
wire TxE_IRQ; // Interrupt Tx Error
wire RxB_IRQ; // Interrupt Rx Buffer
wire RxE_IRQ; // Interrupt Rx Error
wire Busy_IRQ; // Interrupt Busy (lack of buffers)
 
//wire DWord;
wire ByteSelected;
wire BDAck;
wire [31:0] BD_WB_DAT_O; // wb_dat_o that comes from the Wishbone module
//(for buffer descriptors read/write)
wire [3:0] BDCs; // Buffer descriptor CS
wire CsMiss; // When access to the address between 0x800
// and 0xfff occurs, acknowledge is set
// but data is not valid.
wire r_Pad;
wire r_CrcEn;
wire r_FullD;
wire r_Pro;
wire r_Bro;
wire r_NoPre;
wire r_RxFlow;
wire r_PassAll;
wire TxCtrlEndFrm;
wire StartTxDone;
wire SetPauseTimer;
wire TxUsedDataIn;
wire TxDoneIn;
wire TxAbortIn;
wire PerPacketPad;
wire PadOut;
wire PerPacketCrcEn;
wire CrcEnOut;
wire TxStartFrmOut;
wire TxEndFrmOut;
wire ReceivedPauseFrm;
wire ControlFrmAddressOK;
wire RxStatusWriteLatched_sync2;
wire LateCollision;
wire DeferIndication;
wire LateCollLatched;
wire DeferLatched;
wire RstDeferLatched;
wire CarrierSenseLost;
 
wire temp_wb_ack_o;
wire [31:0] temp_wb_dat_o;
wire temp_wb_err_o;
 
`ifdef ETH_REGISTERED_OUTPUTS
reg temp_wb_ack_o_reg;
reg [31:0] temp_wb_dat_o_reg;
reg temp_wb_err_o_reg;
`endif
 
//assign DWord = &wb_sel_i;
assign ByteSelected = |wb_sel_i;
assign RegCs[3] = wb_stb_i & wb_cyc_i & ByteSelected & ~wb_adr_i[11] & ~wb_adr_i[10] & wb_sel_i[3]; // 0x0 - 0x3FF
assign RegCs[2] = wb_stb_i & wb_cyc_i & ByteSelected & ~wb_adr_i[11] & ~wb_adr_i[10] & wb_sel_i[2]; // 0x0 - 0x3FF
assign RegCs[1] = wb_stb_i & wb_cyc_i & ByteSelected & ~wb_adr_i[11] & ~wb_adr_i[10] & wb_sel_i[1]; // 0x0 - 0x3FF
assign RegCs[0] = wb_stb_i & wb_cyc_i & ByteSelected & ~wb_adr_i[11] & ~wb_adr_i[10] & wb_sel_i[0]; // 0x0 - 0x3FF
assign BDCs[3] = wb_stb_i & wb_cyc_i & ByteSelected & ~wb_adr_i[11] & wb_adr_i[10] & wb_sel_i[3]; // 0x400 - 0x7FF
assign BDCs[2] = wb_stb_i & wb_cyc_i & ByteSelected & ~wb_adr_i[11] & wb_adr_i[10] & wb_sel_i[2]; // 0x400 - 0x7FF
assign BDCs[1] = wb_stb_i & wb_cyc_i & ByteSelected & ~wb_adr_i[11] & wb_adr_i[10] & wb_sel_i[1]; // 0x400 - 0x7FF
assign BDCs[0] = wb_stb_i & wb_cyc_i & ByteSelected & ~wb_adr_i[11] & wb_adr_i[10] & wb_sel_i[0]; // 0x400 - 0x7FF
assign CsMiss = wb_stb_i & wb_cyc_i & ByteSelected & wb_adr_i[11]; // 0x800 - 0xfFF
assign temp_wb_dat_o = ((|RegCs) & ~wb_we_i)? RegDataOut : BD_WB_DAT_O;
assign temp_wb_err_o = wb_stb_i & wb_cyc_i & (~ByteSelected | CsMiss);
 
`ifdef ETH_REGISTERED_OUTPUTS
assign wb_ack_o = temp_wb_ack_o_reg;
assign wb_dat_o[31:0] = temp_wb_dat_o_reg;
assign wb_err_o = temp_wb_err_o_reg;
`else
assign wb_ack_o = temp_wb_ack_o;
assign wb_dat_o[31:0] = temp_wb_dat_o;
assign wb_err_o = temp_wb_err_o;
`endif
 
`ifdef ETH_AVALON_BUS
// As Avalon has no corresponding "error" signal, I (erroneously) will
// send an ack to Avalon, even when accessing undefined memory. This
// is a grey area in Avalon vs. Wishbone specs: My understanding
// is that Avalon expects all memory addressable by the addr bus feeding
// a slave to be, at the very minimum, readable.
assign temp_wb_ack_o = (|RegCs) | BDAck | CsMiss;
`else // WISHBONE
assign temp_wb_ack_o = (|RegCs) | BDAck;
`endif
 
`ifdef ETH_REGISTERED_OUTPUTS
always @ (posedge wb_clk_i or posedge wb_rst_i)
begin
if(wb_rst_i)
begin
temp_wb_ack_o_reg <= 1'b0;
temp_wb_dat_o_reg <= 32'h0;
temp_wb_err_o_reg <= 1'b0;
end
else
begin
temp_wb_ack_o_reg <= temp_wb_ack_o & ~temp_wb_ack_o_reg;
temp_wb_dat_o_reg <= temp_wb_dat_o;
temp_wb_err_o_reg <= temp_wb_err_o & ~temp_wb_err_o_reg;
end
end
`endif
 
 
// Connecting Ethernet registers
eth_registers ethreg1
(
.DataIn(wb_dat_i),
.Address(wb_adr_i[9:2]),
.Rw(wb_we_i),
.Cs(RegCs),
.Clk(wb_clk_i),
.Reset(wb_rst_i),
.DataOut(RegDataOut),
.r_RecSmall(r_RecSmall),
.r_Pad(r_Pad),
.r_HugEn(r_HugEn),
.r_CrcEn(r_CrcEn),
.r_DlyCrcEn(r_DlyCrcEn),
.r_FullD(r_FullD),
.r_ExDfrEn(r_ExDfrEn),
.r_NoBckof(r_NoBckof),
.r_LoopBck(r_LoopBck),
.r_IFG(r_IFG),
.r_Pro(r_Pro),
.r_Iam(),
.r_Bro(r_Bro),
.r_NoPre(r_NoPre),
.r_TxEn(r_TxEn),
.r_RxEn(r_RxEn),
.Busy_IRQ(Busy_IRQ),
.RxE_IRQ(RxE_IRQ),
.RxB_IRQ(RxB_IRQ),
.TxE_IRQ(TxE_IRQ),
.TxB_IRQ(TxB_IRQ),
.r_IPGT(r_IPGT),
.r_IPGR1(r_IPGR1),
.r_IPGR2(r_IPGR2),
.r_MinFL(r_MinFL),
.r_MaxFL(r_MaxFL),
.r_MaxRet(r_MaxRet),
.r_CollValid(r_CollValid),
.r_TxFlow(r_TxFlow),
.r_RxFlow(r_RxFlow),
.r_PassAll(r_PassAll),
.r_MiiNoPre(r_MiiNoPre),
.r_ClkDiv(r_ClkDiv),
.r_WCtrlData(r_WCtrlData),
.r_RStat(r_RStat),
.r_ScanStat(r_ScanStat),
.r_RGAD(r_RGAD),
.r_FIAD(r_FIAD),
.r_CtrlData(r_CtrlData),
.NValid_stat(NValid_stat),
.Busy_stat(Busy_stat),
.LinkFail(LinkFail),
.r_MAC(r_MAC),
.WCtrlDataStart(WCtrlDataStart),
.RStatStart(RStatStart),
.UpdateMIIRX_DATAReg(UpdateMIIRX_DATAReg),
.Prsd(Prsd),
.r_TxBDNum(r_TxBDNum),
.int_o(int_o),
.r_HASH0(r_HASH0),
.r_HASH1(r_HASH1),
.r_TxPauseRq(r_TxPauseRq),
.r_TxPauseTV(r_TxPauseTV),
.RstTxPauseRq(RstTxPauseRq),
.TxCtrlEndFrm(TxCtrlEndFrm),
.StartTxDone(StartTxDone),
.TxClk(mtx_clk_pad_i),
.RxClk(mrx_clk_pad_i),
.dbg_dat(wb_dbg_dat0),
.SetPauseTimer(SetPauseTimer)
);
 
 
 
wire [7:0] RxData;
wire RxValid;
wire RxStartFrm;
wire RxEndFrm;
wire RxAbort;
 
wire WillTransmit; // Will transmit (to RxEthMAC)
wire ResetCollision; // Reset Collision (for synchronizing
// collision)
wire [7:0] TxDataOut; // Transmit Packet Data (to TxEthMAC)
wire WillSendControlFrame;
wire ReceiveEnd;
wire ReceivedPacketGood;
wire ReceivedLengthOK;
wire InvalidSymbol;
wire LatchedCrcError;
wire RxLateCollision;
wire [3:0] RetryCntLatched;
wire [3:0] RetryCnt;
wire StartTxAbort;
wire MaxCollisionOccured;
wire RetryLimit;
wire StatePreamble;
wire [1:0] StateData;
 
// Connecting MACControl
eth_maccontrol maccontrol1
(
.MTxClk(mtx_clk_pad_i),
.TPauseRq(TPauseRq),
.TxPauseTV(r_TxPauseTV),
.TxDataIn(TxData),
.TxStartFrmIn(TxStartFrm),
.TxEndFrmIn(TxEndFrm),
.TxUsedDataIn(TxUsedDataIn),
.TxDoneIn(TxDoneIn),
.TxAbortIn(TxAbortIn),
.MRxClk(mrx_clk_pad_i),
.RxData(RxData),
.RxValid(RxValid),
.RxStartFrm(RxStartFrm),
.RxEndFrm(RxEndFrm),
.ReceiveEnd(ReceiveEnd),
.ReceivedPacketGood(ReceivedPacketGood),
.TxFlow(r_TxFlow),
.RxFlow(r_RxFlow),
.DlyCrcEn(r_DlyCrcEn),
.MAC(r_MAC),
.PadIn(r_Pad | PerPacketPad),
.PadOut(PadOut),
.CrcEnIn(r_CrcEn | PerPacketCrcEn),
.CrcEnOut(CrcEnOut),
.TxReset(wb_rst_i),
.RxReset(wb_rst_i),
.ReceivedLengthOK(ReceivedLengthOK),
.TxDataOut(TxDataOut),
.TxStartFrmOut(TxStartFrmOut),
.TxEndFrmOut(TxEndFrmOut),
.TxUsedDataOut(TxUsedData),
.TxDoneOut(TxDone),
.TxAbortOut(TxAbort),
.WillSendControlFrame(WillSendControlFrame),
.TxCtrlEndFrm(TxCtrlEndFrm),
.ReceivedPauseFrm(ReceivedPauseFrm),
.ControlFrmAddressOK(ControlFrmAddressOK),
.SetPauseTimer(SetPauseTimer),
.RxStatusWriteLatched_sync2(RxStatusWriteLatched_sync2),
.r_PassAll(r_PassAll)
);
 
 
 
wire TxCarrierSense; // Synchronized CarrierSense (to Tx clock)
wire Collision; // Synchronized Collision
 
reg CarrierSense_Tx1;
reg CarrierSense_Tx2;
reg Collision_Tx1;
reg Collision_Tx2;
 
reg RxEnSync; // Synchronized Receive Enable
reg WillTransmit_q;
reg WillTransmit_q2;
 
 
 
// Muxed MII receive data valid
assign MRxDV_Lb = r_LoopBck? mtxen_pad_o : mrxdv_pad_i & RxEnSync;
 
// Muxed MII Receive Error
assign MRxErr_Lb = r_LoopBck? mtxerr_pad_o : mrxerr_pad_i & RxEnSync;
 
// Muxed MII Receive Data
assign MRxD_Lb[3:0] = r_LoopBck? mtxd_pad_o[3:0] : mrxd_pad_i[3:0];
 
 
 
// Connecting TxEthMAC
eth_txethmac txethmac1
(
.MTxClk(mtx_clk_pad_i),
.Reset(wb_rst_i),
.CarrierSense(TxCarrierSense),
.Collision(Collision),
.TxData(TxDataOut),
.TxStartFrm(TxStartFrmOut),
.TxUnderRun(TxUnderRun),
.TxEndFrm(TxEndFrmOut),
.Pad(PadOut),
.MinFL(r_MinFL),
.CrcEn(CrcEnOut),
.FullD(r_FullD),
.HugEn(r_HugEn),
.DlyCrcEn(r_DlyCrcEn),
.IPGT(r_IPGT),
.IPGR1(r_IPGR1),
.IPGR2(r_IPGR2),
.CollValid(r_CollValid),
.MaxRet(r_MaxRet),
.NoBckof(r_NoBckof),
.ExDfrEn(r_ExDfrEn),
.MaxFL(r_MaxFL),
.MTxEn(mtxen_pad_o),
.MTxD(mtxd_pad_o),
.MTxErr(mtxerr_pad_o),
.TxUsedData(TxUsedDataIn),
.TxDone(TxDoneIn),
.TxRetry(TxRetry),
.TxAbort(TxAbortIn),
.WillTransmit(WillTransmit),
.ResetCollision(ResetCollision),
.RetryCnt(RetryCnt),
.StartTxDone(StartTxDone),
.StartTxAbort(StartTxAbort),
.MaxCollisionOccured(MaxCollisionOccured),
.LateCollision(LateCollision),
.DeferIndication(DeferIndication),
.StatePreamble(StatePreamble),
.StateData(StateData)
);
 
 
 
 
wire [15:0] RxByteCnt;
wire RxByteCntEq0;
wire RxByteCntGreat2;
wire RxByteCntMaxFrame;
wire RxCrcError;
wire RxStateIdle;
wire RxStatePreamble;
wire RxStateSFD;
wire [1:0] RxStateData;
wire AddressMiss;
 
 
 
// Connecting RxEthMAC
eth_rxethmac rxethmac1
(
.MRxClk(mrx_clk_pad_i),
.MRxDV(MRxDV_Lb),
.MRxD(MRxD_Lb),
.Transmitting(Transmitting),
.HugEn(r_HugEn),
.DlyCrcEn(r_DlyCrcEn),
.MaxFL(r_MaxFL),
.r_IFG(r_IFG),
.Reset(wb_rst_i),
.RxData(RxData),
.RxValid(RxValid),
.RxStartFrm(RxStartFrm),
.RxEndFrm(RxEndFrm),
.ByteCnt(RxByteCnt),
.ByteCntEq0(RxByteCntEq0),
.ByteCntGreat2(RxByteCntGreat2),
.ByteCntMaxFrame(RxByteCntMaxFrame),
.CrcError(RxCrcError),
.StateIdle(RxStateIdle),
.StatePreamble(RxStatePreamble),
.StateSFD(RxStateSFD),
.StateData(RxStateData),
.MAC(r_MAC),
.r_Pro(r_Pro),
.r_Bro(r_Bro),
.r_HASH0(r_HASH0),
.r_HASH1(r_HASH1),
.RxAbort(RxAbort),
.AddressMiss(AddressMiss),
.PassAll(r_PassAll),
.ControlFrmAddressOK(ControlFrmAddressOK)
);
 
 
// MII Carrier Sense Synchronization
always @ (posedge mtx_clk_pad_i or posedge wb_rst_i)
begin
if(wb_rst_i)
begin
CarrierSense_Tx1 <= 1'b0;
CarrierSense_Tx2 <= 1'b0;
end
else
begin
CarrierSense_Tx1 <= mcrs_pad_i;
CarrierSense_Tx2 <= CarrierSense_Tx1;
end
end
 
assign TxCarrierSense = ~r_FullD & CarrierSense_Tx2;
 
 
// MII Collision Synchronization
always @ (posedge mtx_clk_pad_i or posedge wb_rst_i)
begin
if(wb_rst_i)
begin
Collision_Tx1 <= 1'b0;
Collision_Tx2 <= 1'b0;
end
else
begin
Collision_Tx1 <= mcoll_pad_i;
if(ResetCollision)
Collision_Tx2 <= 1'b0;
else
if(Collision_Tx1)
Collision_Tx2 <= 1'b1;
end
end
 
 
// Synchronized Collision
assign Collision = ~r_FullD & Collision_Tx2;
 
 
 
// Delayed WillTransmit
always @ (posedge mrx_clk_pad_i)
begin
WillTransmit_q <= WillTransmit;
WillTransmit_q2 <= WillTransmit_q;
end
 
 
assign Transmitting = ~r_FullD & WillTransmit_q2;
 
 
 
// Synchronized Receive Enable
always @ (posedge mrx_clk_pad_i or posedge wb_rst_i)
begin
if(wb_rst_i)
RxEnSync <= 1'b0;
else
if(~mrxdv_pad_i)
RxEnSync <= r_RxEn;
end
 
 
 
// Synchronizing WillSendControlFrame to WB_CLK;
always @ (posedge wb_clk_i or posedge wb_rst_i)
begin
if(wb_rst_i)
WillSendControlFrame_sync1 <= 1'b0;
else
WillSendControlFrame_sync1 <= WillSendControlFrame;
end
 
always @ (posedge wb_clk_i or posedge wb_rst_i)
begin
if(wb_rst_i)
WillSendControlFrame_sync2 <= 1'b0;
else
WillSendControlFrame_sync2 <= WillSendControlFrame_sync1;
end
 
always @ (posedge wb_clk_i or posedge wb_rst_i)
begin
if(wb_rst_i)
WillSendControlFrame_sync3 <= 1'b0;
else
WillSendControlFrame_sync3 <= WillSendControlFrame_sync2;
end
 
always @ (posedge wb_clk_i or posedge wb_rst_i)
begin
if(wb_rst_i)
RstTxPauseRq <= 1'b0;
else
RstTxPauseRq <= WillSendControlFrame_sync2 & ~WillSendControlFrame_sync3;
end
 
 
 
 
// TX Pause request Synchronization
always @ (posedge mtx_clk_pad_i or posedge wb_rst_i)
begin
if(wb_rst_i)
begin
TxPauseRq_sync1 <= 1'b0;
TxPauseRq_sync2 <= 1'b0;
TxPauseRq_sync3 <= 1'b0;
end
else
begin
TxPauseRq_sync1 <= (r_TxPauseRq & r_TxFlow);
TxPauseRq_sync2 <= TxPauseRq_sync1;
TxPauseRq_sync3 <= TxPauseRq_sync2;
end
end
 
 
always @ (posedge mtx_clk_pad_i or posedge wb_rst_i)
begin
if(wb_rst_i)
TPauseRq <= 1'b0;
else
TPauseRq <= TxPauseRq_sync2 & (~TxPauseRq_sync3);
end
 
 
wire LatchedMRxErr;
reg RxAbort_latch;
reg RxAbort_sync1;
reg RxAbort_wb;
reg RxAbortRst_sync1;
reg RxAbortRst;
 
// Synchronizing RxAbort to the WISHBONE clock
always @ (posedge mrx_clk_pad_i or posedge wb_rst_i)
begin
if(wb_rst_i)
RxAbort_latch <= 1'b0;
else if(RxAbort | (ShortFrame & ~r_RecSmall) | LatchedMRxErr &
~InvalidSymbol | (ReceivedPauseFrm & (~r_PassAll)))
RxAbort_latch <= 1'b1;
else if(RxAbortRst)
RxAbort_latch <= 1'b0;
end
 
always @ (posedge wb_clk_i or posedge wb_rst_i)
begin
if(wb_rst_i)
begin
RxAbort_sync1 <= 1'b0;
RxAbort_wb <= 1'b0;
RxAbort_wb <= 1'b0;
end
else
begin
RxAbort_sync1 <= RxAbort_latch;
RxAbort_wb <= RxAbort_sync1;
end
end
 
always @ (posedge mrx_clk_pad_i or posedge wb_rst_i)
begin
if(wb_rst_i)
begin
RxAbortRst_sync1 <= 1'b0;
RxAbortRst <= 1'b0;
end
else
begin
RxAbortRst_sync1 <= RxAbort_wb;
RxAbortRst <= RxAbortRst_sync1;
end
end
 
 
 
// Connecting Wishbone module
eth_wishbone #(.TX_FIFO_DATA_WIDTH(TX_FIFO_DATA_WIDTH),
.TX_FIFO_DEPTH (TX_FIFO_DEPTH),
.TX_FIFO_CNT_WIDTH (TX_FIFO_CNT_WIDTH),
.RX_FIFO_DATA_WIDTH(RX_FIFO_DATA_WIDTH),
.RX_FIFO_DEPTH (RX_FIFO_DEPTH),
.RX_FIFO_CNT_WIDTH (RX_FIFO_CNT_WIDTH))
wishbone
(
.WB_CLK_I(wb_clk_i),
.WB_DAT_I(wb_dat_i),
.WB_DAT_O(BD_WB_DAT_O),
 
// WISHBONE slave
.WB_ADR_I(wb_adr_i[9:2]),
.WB_WE_I(wb_we_i),
.BDCs(BDCs),
.WB_ACK_O(BDAck),
.Reset(wb_rst_i),
 
// WISHBONE master
.m_wb_adr_o(m_wb_adr_tmp),
.m_wb_sel_o(m_wb_sel_o),
.m_wb_we_o(m_wb_we_o),
.m_wb_dat_i(m_wb_dat_i),
.m_wb_dat_o(m_wb_dat_o),
.m_wb_cyc_o(m_wb_cyc_o),
.m_wb_stb_o(m_wb_stb_o),
.m_wb_ack_i(m_wb_ack_i),
.m_wb_err_i(m_wb_err_i),
`ifdef ETH_WISHBONE_B3
.m_wb_cti_o(m_wb_cti_o),
.m_wb_bte_o(m_wb_bte_o),
`endif
 
//TX
.MTxClk(mtx_clk_pad_i),
.TxStartFrm(TxStartFrm),
.TxEndFrm(TxEndFrm),
.TxUsedData(TxUsedData),
.TxData(TxData),
.TxRetry(TxRetry),
.TxAbort(TxAbort),
.TxUnderRun(TxUnderRun),
.TxDone(TxDone),
.PerPacketCrcEn(PerPacketCrcEn),
.PerPacketPad(PerPacketPad),
 
// Register
.r_TxEn(r_TxEn),
.r_RxEn(r_RxEn),
.r_TxBDNum(r_TxBDNum),
.r_RxFlow(r_RxFlow),
.r_PassAll(r_PassAll),
 
//RX
.MRxClk(mrx_clk_pad_i),
.RxData(RxData),
.RxValid(RxValid),
.RxStartFrm(RxStartFrm),
.RxEndFrm(RxEndFrm),
.Busy_IRQ(Busy_IRQ),
.RxE_IRQ(RxE_IRQ),
.RxB_IRQ(RxB_IRQ),
.TxE_IRQ(TxE_IRQ),
.TxB_IRQ(TxB_IRQ),
 
.RxAbort(RxAbort_wb),
.RxStatusWriteLatched_sync2(RxStatusWriteLatched_sync2),
 
.InvalidSymbol(InvalidSymbol),
.LatchedCrcError(LatchedCrcError),
.RxLength(RxByteCnt),
.RxLateCollision(RxLateCollision),
.ShortFrame(ShortFrame),
.DribbleNibble(DribbleNibble),
.ReceivedPacketTooBig(ReceivedPacketTooBig),
.LoadRxStatus(LoadRxStatus),
.RetryCntLatched(RetryCntLatched),
.RetryLimit(RetryLimit),
.LateCollLatched(LateCollLatched),
.DeferLatched(DeferLatched),
.RstDeferLatched(RstDeferLatched),
.CarrierSenseLost(CarrierSenseLost),
.ReceivedPacketGood(ReceivedPacketGood),
.AddressMiss(AddressMiss),
.ReceivedPauseFrm(ReceivedPauseFrm)
`ifdef ETH_BIST
,
.mbist_si_i (mbist_si_i),
.mbist_so_o (mbist_so_o),
.mbist_ctrl_i (mbist_ctrl_i)
`endif
`ifdef WISHBONE_DEBUG
,
.dbg_dat0(wb_dbg_dat0)
`endif
 
);
 
assign m_wb_adr_o = {m_wb_adr_tmp, 2'h0};
 
// Connecting MacStatus module
eth_macstatus macstatus1
(
.MRxClk(mrx_clk_pad_i),
.Reset(wb_rst_i),
.ReceiveEnd(ReceiveEnd),
.ReceivedPacketGood(ReceivedPacketGood),
.ReceivedLengthOK(ReceivedLengthOK),
.RxCrcError(RxCrcError),
.MRxErr(MRxErr_Lb),
.MRxDV(MRxDV_Lb),
.RxStateSFD(RxStateSFD),
.RxStateData(RxStateData),
.RxStatePreamble(RxStatePreamble),
.RxStateIdle(RxStateIdle),
.Transmitting(Transmitting),
.RxByteCnt(RxByteCnt),
.RxByteCntEq0(RxByteCntEq0),
.RxByteCntGreat2(RxByteCntGreat2),
.RxByteCntMaxFrame(RxByteCntMaxFrame),
.InvalidSymbol(InvalidSymbol),
.MRxD(MRxD_Lb),
.LatchedCrcError(LatchedCrcError),
.Collision(mcoll_pad_i),
.CollValid(r_CollValid),
.RxLateCollision(RxLateCollision),
.r_RecSmall(r_RecSmall),
.r_MinFL(r_MinFL),
.r_MaxFL(r_MaxFL),
.ShortFrame(ShortFrame),
.DribbleNibble(DribbleNibble),
.ReceivedPacketTooBig(ReceivedPacketTooBig),
.r_HugEn(r_HugEn),
.LoadRxStatus(LoadRxStatus),
.RetryCnt(RetryCnt),
.StartTxDone(StartTxDone),
.StartTxAbort(StartTxAbort),
.RetryCntLatched(RetryCntLatched),
.MTxClk(mtx_clk_pad_i),
.MaxCollisionOccured(MaxCollisionOccured),
.RetryLimit(RetryLimit),
.LateCollision(LateCollision),
.LateCollLatched(LateCollLatched),
.DeferIndication(DeferIndication),
.DeferLatched(DeferLatched),
.RstDeferLatched(RstDeferLatched),
.TxStartFrm(TxStartFrmOut),
.StatePreamble(StatePreamble),
.StateData(StateData),
.CarrierSense(CarrierSense_Tx2),
.CarrierSenseLost(CarrierSenseLost),
.TxUsedData(TxUsedDataIn),
.LatchedMRxErr(LatchedMRxErr),
.Loopback(r_LoopBck),
.r_FullD(r_FullD)
);
 
 
endmodule

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