//////////////////////////////////////////////////////////////////////////////// // Copyright (C) 2017, MINRES Technologies GmbH // All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are met: // // 1. Redistributions of source code must retain the above copyright notice, // this list of conditions and the following disclaimer. // // 2. Redistributions in binary form must reproduce the above copyright notice, // this list of conditions and the following disclaimer in the documentation // and/or other materials provided with the distribution. // // 3. Neither the name of the copyright holder nor the names of its contributors // may be used to endorse or promote products derived from this software // without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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. // // Contributors: // eyck@minres.com - initial implementation // // //////////////////////////////////////////////////////////////////////////////// #include "sysc/SiFive/gpio.h" #include "sysc/sc_comm_singleton.h" #include "scc/report.h" #include "scc/utilities.h" #include "sysc/SiFive/gen/gpio_regs.h" namespace sysc { gpio::gpio(sc_core::sc_module_name nm) : sc_core::sc_module(nm) , tlm_target<>(clk) , NAMED(clk_i) , NAMED(rst_i) , NAMED(pins_o, 32) , NAMED(pins_i, 32) , NAMED(iof0_o, 32) , NAMED(iof1_o, 32) , NAMED(iof0_i, 32) , NAMED(iof1_i, 32) , NAMEDD(gpio_regs, regs) , NAMED(write_to_ws, false){ regs->registerResources(*this); SC_METHOD(clock_cb); sensitive << clk_i; SC_METHOD(reset_cb); sensitive << rst_i; dont_initialize(); auto pins_i_cb =[this](unsigned int tag, tlm::tlm_signal_gp& gp, tlm::tlm_phase& phase, sc_core::sc_time& delay)->tlm::tlm_sync_enum{ this->pin_input(tag, gp, delay); return tlm::TLM_COMPLETED; }; auto i=0U; for(auto& s:pins_i){ s.register_nb_transport(pins_i_cb, i); ++i; } auto iof0_i_cb =[this](unsigned int tag, tlm::tlm_signal_gp& gp, tlm::tlm_phase& phase, sc_core::sc_time& delay)->tlm::tlm_sync_enum{ last_iof0[tag]=gp.get_value(); this->iof_input(tag, 0, gp, delay); return tlm::TLM_COMPLETED; }; i=0; for(auto& s:iof0_i){ s.register_nb_transport(iof0_i_cb, i); ++i; } auto iof1_i_cb =[this](unsigned int tag, tlm::tlm_signal_gp& gp, tlm::tlm_phase& phase, sc_core::sc_time& delay)->tlm::tlm_sync_enum{ last_iof1[tag]=gp.get_value(); this->iof_input(tag, 1, gp, delay); return tlm::TLM_COMPLETED; }; i=0; for(auto& s:iof1_i){ s.register_nb_transport(iof1_i_cb, i); ++i; } regs->port.set_write_cb([this](scc::sc_register ®, uint32_t data) -> bool { if (!this->regs->in_reset()) { reg.put(data); // read r_ports and update pins_io update_pins(); } return true; }); regs->iof_en.set_write_cb([this](scc::sc_register ®, uint32_t data) -> bool { if (!this->regs->in_reset()) { enable_outputs(data, regs->r_iof_sel); reg.put(data); } return true; }); regs->iof_sel.set_write_cb([this](scc::sc_register ®, uint32_t data) -> bool { if (!this->regs->in_reset()) { enable_outputs(regs->r_iof_en, data); reg.put(data); } return true; }); } gpio::~gpio() {} void gpio::before_end_of_elaboration() { if(write_to_ws.get_value()) { LOG(TRACE)<<"Adding WS handler for "<<(std::string{"/ws/"}+name()); handler=std::make_shared(); sc_comm_singleton::inst().registerWebSocketHandler((std::string{"/ws/"}+name()).c_str(), handler); } } void gpio::reset_cb() { if (rst_i.read()) regs->reset_start(); else regs->reset_stop(); } void gpio::clock_cb() { this->clk = clk_i.read(); } tlm::tlm_phase gpio::write_output(tlm::tlm_signal_gp& gp, size_t i, sc_dt::sc_logic val) { sc_core::sc_time delay{SC_ZERO_TIME}; tlm::tlm_phase phase{ tlm::BEGIN_REQ }; gp.set_command(tlm::TLM_WRITE_COMMAND); gp.set_response_status(tlm::TLM_OK_RESPONSE); gp.set_value(val); pins_o.at(i)->nb_transport_fw(gp, phase, delay); return phase; } void gpio::update_pins() { sc_core::sc_inout_rv<32>::data_type out_val; tlm::tlm_signal_gp gp; for(size_t i=0, mask = 1; i<32; ++i, mask<<=1){ if((regs->iof_en&mask == 0) || (iof0_i[i].size()==0 && iof1_i[i].size()==0)){ auto val = regs->r_output_en&mask? regs->r_port&mask? sc_dt::Log_1: sc_dt::Log_0: sc_dt::Log_Z; tlm::tlm_phase phase = write_output(gp, i, val); } } } void gpio::enable_outputs(uint32_t new_iof_en, uint32_t new_iof_sel) { auto changed_bits = (regs->r_iof_en^new_iof_en) | (regs->r_iof_sel^new_iof_sel); tlm::tlm_signal_gp gp; for(size_t i=0, mask=1; i<32; ++i, mask<<=1){ if(changed_bits&mask){ if(new_iof_en&mask){ if((regs->r_iof_sel&mask)==0 && iof0_i[i].size()>0){ tlm::tlm_phase phase = write_output(gp, i, last_iof0[i]?sc_dt::Log_1:sc_dt::Log_0); } else if((regs->r_iof_sel&mask)==1 && iof1_i[i].size()>0) tlm::tlm_phase phase = write_output(gp, i, last_iof1[i]?sc_dt::Log_1:sc_dt::Log_0); } else { auto val = regs->r_output_en&mask? regs->r_port&mask?sc_dt::Log_1:sc_dt::Log_0: sc_dt::Log_Z; tlm::tlm_phase phase = write_output(gp, i, val); } } } } void gpio::pin_input(unsigned int tag, tlm::tlm_signal_gp& gp, sc_core::sc_time& delay) { if(delay>SC_ZERO_TIME){ wait(delay); delay=SC_ZERO_TIME; } switch(gp.get_value().value()){ case sc_dt::Log_1: regs->r_value|=1<r_value&=~(1<& gp) { const auto mask = 1U<iof_en&mask){ auto& socket = regs->iof_sel&mask?iof1_o[tag]:iof0_o[tag]; tlm::tlm_signal_gp<> new_gp; for(size_t i=0; inb_transport_fw(new_gp, phase, delay); // we don't care about phase and sync enum } } } void gpio::iof_input(unsigned int tag, unsigned iof_idx, tlm::tlm_signal_gp<>& gp, sc_core::sc_time& delay) { if(delay>SC_ZERO_TIME){ wait(delay); delay=SC_ZERO_TIME; } const auto mask = 1U<r_iof_en&mask){ const auto idx = regs->r_iof_sel&mask?1:0; if(iof_idx == idx){ auto& socket = pins_o[tag]; for(size_t i=0; i new_gp; new_gp.set_command(tlm::TLM_WRITE_COMMAND); auto val = gp.get_value(); new_gp.set_value(val?sc_dt::Log_1:sc_dt::Log_0); new_gp.copy_extensions_from(gp); socket->nb_transport_fw(new_gp, phase, delay); // we don't care about phase and sync enum gp.update_extensions_from(new_gp); } } } } } /* namespace sysc */