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//////////////////////////////////////////////////////////////////////

////                                                              ////

//// usbHost.v                                                    ////

////                                                              ////

//// This file is part of the usbhostslave opencores effort.

//// <http://www.opencores.org/cores//>                           ////

////                                                              ////

//// Module Description:                                          ////

////   Top level module

////                                                              ////

//// To Do:                                                       ////

//// 

////                                                              ////

//// Author(s):                                                   ////

//// - Steve Fielding, sfielding@base2designs.com                 ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

////                                                              ////

//// Copyright (C) 2008 Steve Fielding and OPENCORES.ORG          ////

////                                                              ////

//// 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>                   ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

//

`include "timescale.v"

module usbhost( // Uncapitalised name

  clk_i,

  rst_i,

  address_i,

  data_i,

  data_o,

  we_i,

  strobe_i,

  ack_o,

  usbClk,

  hostSOFSentIntOut,

  hostConnEventIntOut,

  hostResumeIntOut,

  hostTransDoneIntOut,

  USBWireDataIn,

  USBWireDataInTick,

  USBWireDataOut,

  USBWireDataOutTick,

  USBWireCtrlOut,

  USBFullSpeed

   );

  parameter HOST_FIFO_DEPTH = 64; //HOST_FIFO_DEPTH = 2^HOST_ADDR_WIDTH

  parameter HOST_FIFO_ADDR_WIDTH = 6;

input clk_i;               //Wishbone bus clock. Maximum 5*usbClk=240MHz

input rst_i;               //Wishbone bus sync reset. Synchronous to 'clk_i'. Resets all logic

input [7:0] address_i;     //Wishbone bus address in

input [7:0] data_i;        //Wishbone bus data in

output [7:0] data_o;       //Wishbone bus data out

input we_i;                //Wishbone bus write enable in

input strobe_i;            //Wishbone bus strobe in

output ack_o;              //Wishbone bus acknowledge out

input usbClk;              //usb clock. 48Mhz +/-0.25%

output hostSOFSentIntOut;

output hostConnEventIntOut;

output hostResumeIntOut;

output hostTransDoneIntOut;

input [1:0] USBWireDataIn;

output [1:0] USBWireDataOut;

output USBWireDataOutTick;

output USBWireDataInTick;

output USBWireCtrlOut;

output USBFullSpeed;

wire clk_i;

wire rst_i;

wire [7:0] address_i;

wire [7:0] data_i;

wire [7:0] data_o;

wire we_i;

wire strobe_i;

wire ack_o;

wire usbClk;

wire hostSOFSentIntOut;

wire hostConnEventIntOut;

wire hostResumeIntOut;

wire hostTransDoneIntOut;

wire [1:0] USBWireDataIn;

wire [1:0] USBWireDataOut;

wire USBWireDataOutTick;

wire USBWireDataInTick;

wire USBWireCtrlOut;

wire USBFullSpeed;

//internal wiring

wire hostControlSel;

wire slaveControlSel;

wire hostRxFifoSel;

wire hostTxFifoSel;

wire hostSlaveMuxSel;

wire [7:0] dataFromHostControl;

wire [7:0] dataFromSlaveControl;

wire [7:0] dataFromHostRxFifo;

wire [7:0] dataFromHostTxFifo;

wire [7:0] dataFromHostSlaveMux;

wire hostTxFifoRE;

wire [7:0] hostTxFifoData;

wire hostTxFifoEmpty;

wire hostRxFifoWE;

wire [7:0] hostRxFifoData;

wire hostRxFifoFull;

wire [7:0] RxCtrlOut;

wire [7:0] RxDataFromSIE;

wire RxDataOutWEn;

wire fullSpeedBitRateFromHost;

wire fullSpeedPolarityFromHost;

wire SIEPortWEnFromHost;

wire SIEPortTxRdy;

wire [7:0] SIEPortDataInFromHost;

wire [7:0] SIEPortCtrlInFromHost;

wire [1:0] connectState;

wire resumeDetected;

wire [7:0] SIEPortDataInToSIE;

wire SIEPortWEnToSIE;

wire [7:0] SIEPortCtrlInToSIE;

wire fullSpeedPolarityToSIE;

wire fullSpeedBitRateToSIE;

wire noActivityTimeOut;

wire rstSyncToBusClk;

wire rstSyncToUsbClk;

wire noActivityTimeOutEnableToSIE;

wire noActivityTimeOutEnableFromHost;

assign USBFullSpeed = fullSpeedBitRateToSIE;

usbHostControl u_usbHostControl(

  .busClk(clk_i),

  .rstSyncToBusClk(rstSyncToBusClk),

  .usbClk(usbClk),

  .rstSyncToUsbClk(rstSyncToUsbClk),

  .TxFifoRE(hostTxFifoRE),

  .TxFifoData(hostTxFifoData),

  .TxFifoEmpty(hostTxFifoEmpty),

  .RxFifoWE(hostRxFifoWE),

  .RxFifoData(hostRxFifoData),

  .RxFifoFull(hostRxFifoFull),

  .RxByteStatus(RxCtrlOut),

  .RxData(RxDataFromSIE),

  .RxDataValid(RxDataOutWEn),

  .SIERxTimeOut(noActivityTimeOut),

  .SIERxTimeOutEn(noActivityTimeOutEnableFromHost),

  .fullSpeedRate(fullSpeedBitRateFromHost),

  .fullSpeedPol(fullSpeedPolarityFromHost),

  .HCTxPortEn(SIEPortWEnFromHost),

  .HCTxPortRdy(SIEPortTxRdy),

  .HCTxPortData(SIEPortDataInFromHost),

  .HCTxPortCtrl(SIEPortCtrlInFromHost),

  .connectStateIn(connectState),

  .resumeDetectedIn(resumeDetected),

  .busAddress(address_i[3:0]),

  .busDataIn(data_i),

  .busDataOut(dataFromHostControl),

  .busWriteEn(we_i),

  .busStrobe_i(strobe_i),

  .SOFSentIntOut(hostSOFSentIntOut),

  .connEventIntOut(hostConnEventIntOut),

  .resumeIntOut(hostResumeIntOut),

  .transDoneIntOut(hostTransDoneIntOut),

  .hostControlSelect(hostControlSel) );

wishBoneBI u_wishBoneBI (

  .address(address_i),

  .dataIn(data_i),

  .dataOut(data_o),

  .writeEn(we_i),

  .strobe_i(strobe_i),

  .ack_o(ack_o),

  .clk(clk_i),

  .rst(rstSyncToBusClk),

  .hostControlSel(hostControlSel),

  .hostRxFifoSel(hostRxFifoSel),

  .hostTxFifoSel(hostTxFifoSel),

  .slaveControlSel(),

  .slaveEP0RxFifoSel(),

  .slaveEP1RxFifoSel(),

  .slaveEP2RxFifoSel(),

  .slaveEP3RxFifoSel(),

  .slaveEP0TxFifoSel(),

  .slaveEP1TxFifoSel(),

  .slaveEP2TxFifoSel(),

  .slaveEP3TxFifoSel(),

  .hostSlaveMuxSel(hostSlaveMuxSel),

  .dataFromHostControl(dataFromHostControl),

  .dataFromHostRxFifo(dataFromHostRxFifo),

  .dataFromHostTxFifo(dataFromHostTxFifo),

  .dataFromSlaveControl(8'h00),

  .dataFromEP0RxFifo(8'h00),

  .dataFromEP1RxFifo(8'h00),

  .dataFromEP2RxFifo(8'h00),

  .dataFromEP3RxFifo(8'h00),

  .dataFromEP0TxFifo(8'h00),

  .dataFromEP1TxFifo(8'h00),

  .dataFromEP2TxFifo(8'h00),

  .dataFromEP3TxFifo(8'h00),

  .dataFromHostSlaveMux(dataFromHostSlaveMux)

   );

assign SIEPortCtrlInToSIE = SIEPortCtrlInFromHost;

assign SIEPortDataInToSIE = SIEPortDataInFromHost;

assign SIEPortWEnToSIE = SIEPortWEnFromHost;

assign fullSpeedPolarityToSIE = fullSpeedPolarityFromHost;

assign fullSpeedBitRateToSIE = fullSpeedBitRateFromHost;

assign noActivityTimeOutEnableToSIE = noActivityTimeOutEnableFromHost;

hostSlaveMuxBI u_hostSlaveMuxBI (

  .dataIn(data_i),

  .dataOut(dataFromHostSlaveMux),

  .address(address_i[0]),

  .writeEn(we_i),

  .strobe_i(strobe_i),

  .usbClk(usbClk),

  .busClk(clk_i),

  .hostMode(hostMode),

  .hostSlaveMuxSel(hostSlaveMuxSel),

  .rstFromWire(rst_i),

  .rstSyncToBusClkOut(rstSyncToBusClk),

  .rstSyncToUsbClkOut(rstSyncToUsbClk)

);

usbSerialInterfaceEngine u_usbSerialInterfaceEngine(

  .clk(usbClk),

  .rst(rstSyncToUsbClk),

  .USBWireDataIn(USBWireDataIn),

  .USBWireDataOut(USBWireDataOut),

  .USBWireDataInTick(USBWireDataInTick),

  .USBWireDataOutTick(USBWireDataOutTick),

  .USBWireCtrlOut(USBWireCtrlOut),

  .connectState(connectState),

  .resumeDetected(resumeDetected),

  .RxCtrlOut(RxCtrlOut),

  .RxDataOutWEn(RxDataOutWEn),

  .RxDataOut(RxDataFromSIE),

  .SIEPortCtrlIn(SIEPortCtrlInToSIE),

  .SIEPortDataIn(SIEPortDataInToSIE),

  .SIEPortTxRdy(SIEPortTxRdy),

  .SIEPortWEn(SIEPortWEnToSIE),

  .fullSpeedPolarity(fullSpeedPolarityToSIE),

  .fullSpeedBitRate(fullSpeedBitRateToSIE),

  .noActivityTimeOut(noActivityTimeOut),

  .noActivityTimeOutEnable(noActivityTimeOutEnableToSIE)

);

//---Host fifos

TxFifo #(HOST_FIFO_DEPTH, HOST_FIFO_ADDR_WIDTH) HostTxFifo (

  .usbClk(usbClk),

  .busClk(clk_i),

  .rstSyncToBusClk(rstSyncToBusClk),

  .rstSyncToUsbClk(rstSyncToUsbClk),

  .fifoREn(hostTxFifoRE),

  .fifoEmpty(hostTxFifoEmpty),

  .busAddress(address_i[2:0]),

  .busWriteEn(we_i),

  .busStrobe_i(strobe_i),

  .busFifoSelect(hostTxFifoSel),

  .busDataIn(data_i),

  .busDataOut(dataFromHostTxFifo),

  .fifoDataOut(hostTxFifoData) );

RxFifo #(HOST_FIFO_DEPTH, HOST_FIFO_ADDR_WIDTH) HostRxFifo(

  .usbClk(usbClk),

  .busClk(clk_i),

  .rstSyncToBusClk(rstSyncToBusClk),

  .rstSyncToUsbClk(rstSyncToUsbClk),

  .fifoWEn(hostRxFifoWE),

  .fifoFull(hostRxFifoFull),

  .busAddress(address_i[2:0]),

  .busWriteEn(we_i),

  .busStrobe_i(strobe_i),

  .busFifoSelect(hostRxFifoSel),

  .busDataIn(data_i),

  .busDataOut(dataFromHostRxFifo),

  .fifoDataIn(hostRxFifoData)  );

endmodule