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alfoltran |
/////////////////////////////////////////////////////////////////////
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//// ////
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//// USB SIE ////
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//// ////
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//// SystemC Version: usb_sie.cpp ////
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//// Author: Alfredo Luiz Foltran Fialho ////
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//// alfoltran@ig.com.br ////
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//// ////
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//// ////
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/////////////////////////////////////////////////////////////////////
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//// ////
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//// Verilog Version: usb1_utmi_if.v + usb1_pl.v ////
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//// Copyright (C) 2000-2002 Rudolf Usselmann ////
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//// www.asics.ws ////
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//// rudi@asics.ws ////
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//// ////
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//// This source file may be used and distributed without ////
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//// restriction provided that this copyright statement is not ////
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//// removed from the file and that any derivative work contains ////
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//// the original copyright notice and the associated disclaimer.////
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//// ////
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//// THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY ////
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//// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED ////
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//// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS ////
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//// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR ////
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//// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, ////
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//// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES ////
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//// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE ////
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//// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR ////
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//// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ////
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//// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ////
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//// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT ////
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//// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE ////
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//// POSSIBILITY OF SUCH DAMAGE. ////
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//// ////
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/////////////////////////////////////////////////////////////////////
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#include "systemc.h"
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#include "usb_sie.h"
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void usb_sie::tx_interface1(void) {
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if (!rst.read())
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TxValid_s.write(false);
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else
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TxValid_s.write(tx_valid.read() || tx_valid_last.read() ||
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(TxValid_s.read() && !TxReady.read()));
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}
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void usb_sie::tx_interface2(void) {
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tx_ready.write(TxReady.read());
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if (TxReady.read() || tx_first.read())
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DataOut.write(tx_data.read());
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}
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void usb_sie::tx_interface3(void) {
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TxValid.write(TxValid_s.read());
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}
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void usb_sie::rx_interface1(void) {
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if (!rst.read()) {
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rx_valid.write(false);
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rx_active.write(false);
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rx_err.write(false);
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} else {
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rx_valid.write(RxValid.read());
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rx_active.write(RxActive.read());
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rx_err.write(RxError.read());
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}
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}
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void usb_sie::rx_interface2(void) {
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rx_data.write(DataIn.read());
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}
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void usb_sie::csr9_up(void) {
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csr9.write(csr.read().range(8, 0));
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}
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void usb_sie::x_busy_up(void) {
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x_busy.write(tx_busy.read() || rx_busy.read());
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}
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// PIDs we should never receive
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void usb_sie::pid_bad_up(void) {
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pid_bad.write(pid_ACK.read() || pid_NACK.read() ||
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pid_STALL.read() || pid_NYET.read() ||
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pid_PRE.read() || pid_ERR.read() ||
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pid_SPLIT.read() || pid_PING.read());
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}
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void usb_sie::match_o_up(void) {
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match_o.write(!pid_bad.read() && token_valid.read() && !crc5_err.read());
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}
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void usb_sie::rx_data_st_up(void) {
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rx_data_st.write(rx_data_st_d.read());
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}
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void usb_sie::decoder_pk(void) {
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ctrl_setup.write(token_valid.read() && pid_SETUP.read() && (ep_sel.read() == 0));
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ctrl_in.write(token_valid.read() && pid_IN.read() && (ep_sel.read() == 0));
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ctrl_out.write(token_valid.read() && pid_OUT.read() && (ep_sel.read() == 0));
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}
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// Frame Number (from SOF token)
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void usb_sie::frame_no_up1(void) {
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frame_no_we.write(token_valid.read() && !crc5_err.read() && pid_SOF.read());
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}
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void usb_sie::frame_no_up2(void) {
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frame_no_we_r.write(frame_no_we.read());
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}
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void usb_sie::frame_no_up3(void) {
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if (!rst.read())
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frame_no_r.write(0);
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else if (frame_no_we_r.read())
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frame_no_r.write(frame_no.read());
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}
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void usb_sie::frm_nat_up1(void) {
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clr_sof_time.write(frame_no_we.read());
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}
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void usb_sie::frm_nat_up2(void) {
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if (clr_sof_time.read())
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sof_time.write(0);
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else if (hms_clk.read())
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sof_time.write(sof_time.read() + 1);
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}
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void usb_sie::frm_nat_up3(void) {
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frm_nat.write(((sc_uint<5>)0, (sc_uint<11>)frame_no_r.read(), (sc_uint<4>)0, (sc_uint<12>)sof_time.read()));
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}
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void usb_sie::hms_clk_up1(void) {
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if (!rst.read())
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hms_cnt.write(0);
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else if (hms_clk.read() || frame_no_we_r.read())
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hms_cnt.write(0);
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else
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hms_cnt.write(hms_cnt.read() + 1);
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}
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void usb_sie::hms_clk_up2(void) {
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hms_clk.write((hms_cnt.read() == USBF_HMS_DEL));
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}
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// This function is addressed
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void usb_sie::fsel_up(void) {
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fsel.write((token_fadr.read() == fa.read()));
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}
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// Only write when we are addressed
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void usb_sie::idma_we_up(void) {
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idma_we.write(idma_we_d.read() && fsel.read()); // moved full check to idma... && !ep_full.read());
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}
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/*
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usb_sie::~usb_sie(void) {
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if (i_pa_sie)
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delete i_pa_sie;
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if (i_pd_sie)
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delete i_pd_sie;
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if (i_pe_sie)
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delete i_pe_sie;
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if (i_dma)
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delete i_dma;
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}
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*/
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