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Diffstat (limited to 'tests/iwls2005/usb_phy/usb_phy.v')
| -rw-r--r-- | tests/iwls2005/usb_phy/usb_phy.v | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/tests/iwls2005/usb_phy/usb_phy.v b/tests/iwls2005/usb_phy/usb_phy.v new file mode 100644 index 000000000..4ee345add --- /dev/null +++ b/tests/iwls2005/usb_phy/usb_phy.v @@ -0,0 +1,184 @@ +///////////////////////////////////////////////////////////////////// +//// //// +//// USB 1.1 PHY //// +//// //// +//// //// +//// Author: Rudolf Usselmann //// +//// rudi@asics.ws //// +//// //// +//// //// +//// Downloaded from: http://www.opencores.org/cores/usb_phy/ //// +//// //// +///////////////////////////////////////////////////////////////////// +//// //// +//// Copyright (C) 2000-2002 Rudolf Usselmann //// +//// www.asics.ws //// +//// rudi@asics.ws //// +//// //// +//// 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 SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY //// +//// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED //// +//// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS //// +//// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR //// +//// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, //// +//// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES //// +//// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE //// +//// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR //// +//// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF //// +//// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT //// +//// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT //// +//// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE //// +//// POSSIBILITY OF SUCH DAMAGE. //// +//// //// +///////////////////////////////////////////////////////////////////// + +// CVS Log +// +// $Id: usb_phy.v,v 1.4 2003/10/21 05:58:40 rudi Exp $ +// +// $Date: 2003/10/21 05:58:40 $ +// $Revision: 1.4 $ +// $Author: rudi $ +// $Locker: $ +// $State: Exp $ +// +// Change History: +// $Log: usb_phy.v,v $ +// Revision 1.4 2003/10/21 05:58:40 rudi +// usb_rst is no longer or'ed with the incomming reset internally. +// Now usb_rst is simply an output, the application can decide how +// to utilize it. +// +// Revision 1.3 2003/10/19 17:40:13 rudi +// - Made core more robust against line noise +// - Added Error Checking and Reporting +// (See README.txt for more info) +// +// Revision 1.2 2002/09/16 16:06:37 rudi +// Changed top level name to be consistent ... +// +// Revision 1.1.1.1 2002/09/16 14:26:59 rudi +// Created Directory Structure +// +// +// +// +// +// +// +// + +`include "timescale.v" + +module usb_phy(clk, rst, phy_tx_mode, usb_rst, + + // Transciever Interface + txdp, txdn, txoe, + rxd, rxdp, rxdn, + + // UTMI Interface + DataOut_i, TxValid_i, TxReady_o, RxValid_o, + RxActive_o, RxError_o, DataIn_o, LineState_o + ); + +input clk; +input rst; +input phy_tx_mode; +output usb_rst; +output txdp, txdn, txoe; +input rxd, rxdp, rxdn; +input [7:0] DataOut_i; +input TxValid_i; +output TxReady_o; +output [7:0] DataIn_o; +output RxValid_o; +output RxActive_o; +output RxError_o; +output [1:0] LineState_o; + +/////////////////////////////////////////////////////////////////// +// +// Local Wires and Registers +// + +reg [4:0] rst_cnt; +reg usb_rst; +wire fs_ce; +wire rst; + +/////////////////////////////////////////////////////////////////// +// +// Misc Logic +// + +/////////////////////////////////////////////////////////////////// +// +// TX Phy +// + +usb_tx_phy i_tx_phy( + .clk( clk ), + .rst( rst ), + .fs_ce( fs_ce ), + .phy_mode( phy_tx_mode ), + + // Transciever Interface + .txdp( txdp ), + .txdn( txdn ), + .txoe( txoe ), + + // UTMI Interface + .DataOut_i( DataOut_i ), + .TxValid_i( TxValid_i ), + .TxReady_o( TxReady_o ) + ); + +/////////////////////////////////////////////////////////////////// +// +// RX Phy and DPLL +// + +usb_rx_phy i_rx_phy( + .clk( clk ), + .rst( rst ), + .fs_ce( fs_ce ), + + // Transciever Interface + .rxd( rxd ), + .rxdp( rxdp ), + .rxdn( rxdn ), + + // UTMI Interface + .DataIn_o( DataIn_o ), + .RxValid_o( RxValid_o ), + .RxActive_o( RxActive_o ), + .RxError_o( RxError_o ), + .RxEn_i( txoe ), + .LineState( LineState_o ) + ); + +/////////////////////////////////////////////////////////////////// +// +// Generate an USB Reset is we see SE0 for at least 2.5uS +// + +`ifdef USB_ASYNC_REST +always @(posedge clk or negedge rst) +`else +always @(posedge clk) +`endif + if(!rst) rst_cnt <= 5'h0; + else + if(LineState_o != 2'h0) rst_cnt <= 5'h0; + else + if(!usb_rst && fs_ce) rst_cnt <= rst_cnt + 5'h1; + +always @(posedge clk) + usb_rst <= (rst_cnt == 5'h1f); + +endmodule + |