| // Copyright lowRISC contributors. |
| // Licensed under the Apache License, Version 2.0, see LICENSE for details. |
| // SPDX-License-Identifier: Apache-2.0 |
| // |
| // Serial Peripheral Interface (SPI) Device module. |
| // |
| |
| `include "prim_assert.sv" |
| |
| module spi_device ( |
| input clk_i, |
| input rst_ni, |
| |
| // Register interface |
| input tlul_pkg::tl_h2d_t tl_i, |
| output tlul_pkg::tl_d2h_t tl_o, |
| |
| // SPI Interface |
| input cio_sck_i, |
| input cio_csb_i, |
| output logic cio_sdo_o, |
| output logic cio_sdo_en_o, |
| input cio_sdi_i, |
| |
| // Interrupts |
| output logic intr_rxf_o, // RX FIFO Full |
| output logic intr_rxlvl_o, // RX FIFO above level |
| output logic intr_txlvl_o, // TX FIFO below level |
| output logic intr_rxerr_o, // RX Frame error |
| output logic intr_rxoverflow_o, // RX Async FIFO Overflow |
| output logic intr_txunderflow_o, // TX Async FIFO Underflow |
| |
| input scan_rst_ni, |
| input lc_ctrl_pkg::lc_tx_t scanmode_i |
| ); |
| |
| import spi_device_pkg::*; |
| import spi_device_reg_pkg::*; |
| |
| localparam int FifoWidth = $bits(spi_byte_t); |
| localparam int FifoDepth = 8; // 2 DWords |
| localparam int SDW = $clog2(SramDw/FifoWidth); |
| localparam int PtrW = SramAw + 1 + SDW; |
| localparam int AsFifoDepthW = $clog2(FifoDepth+1); |
| |
| logic clk_spi_in, clk_spi_in_buf; // clock for latch SDI |
| logic clk_spi_out, clk_spi_out_buf; // clock for driving SDO |
| |
| spi_device_reg2hw_t reg2hw; |
| spi_device_hw2reg_t hw2reg; |
| |
| tlul_pkg::tl_h2d_t tl_sram_h2d [1]; |
| tlul_pkg::tl_d2h_t tl_sram_d2h [1]; |
| |
| // Dual-port SRAM Interface: Refer prim_ram_2p_wrapper.sv |
| logic mem_a_req; |
| logic mem_a_write; |
| logic [SramAw-1:0] mem_a_addr; |
| logic [SramDw-1:0] mem_a_wdata; |
| logic mem_a_rvalid; |
| logic [SramDw-1:0] mem_a_rdata; |
| logic [1:0] mem_a_rerror; |
| |
| logic mem_b_req; |
| logic mem_b_write; |
| logic [SramAw-1:0] mem_b_addr; |
| logic [SramDw-1:0] mem_b_wdata; |
| logic mem_b_rvalid; |
| logic [SramDw-1:0] mem_b_rdata; |
| logic [1:0] mem_b_rerror; |
| |
| ///////////////////// |
| // Control signals // |
| ///////////////////// |
| |
| logic cpol; // Clock polarity |
| logic cpha; // Phase : Not complete |
| logic txorder; // TX bitstream order: 0(bit 7 to 0), 1(bit 0 to 7) |
| logic rxorder; // RX bitstream order: 0(bit 7 to 0), 1(bit 0 to 7) |
| |
| logic abort; // Abort current operations (txf only at this time) |
| // Think how FW knows abort is done. |
| //logic abort_done; // TODO: Not implemented yet |
| |
| logic csb_syncd; |
| |
| logic rst_txfifo_n, rst_rxfifo_n; |
| logic rst_txfifo_reg, rst_rxfifo_reg; |
| |
| //spi_addr_size_e addr_size; // Not used in fwmode |
| spi_mode_e spi_mode; |
| //spi_byte_t fw_dummy_byte; |
| |
| logic intr_sram_rxf_full, intr_fwm_rxerr; |
| logic intr_fwm_rxlvl, rxlvl, rxlvl_d, intr_fwm_txlvl, txlvl, txlvl_d; |
| logic intr_fwm_rxoverflow, intr_fwm_txunderflow; |
| |
| // RX Async FIFO Signals |
| // Write: SCK positive edge |
| logic rxf_wvalid, rxf_wready; |
| spi_byte_t rxf_wdata; |
| logic rxf_overflow; |
| // Read: Main clock |
| logic rxf_rvalid, rxf_rready; |
| spi_byte_t rxf_rdata; |
| logic rxf_full_syncd; |
| |
| // TX Async FIFO Signals |
| // Read: SCK negative edge |
| logic txf_rvalid, txf_rready; |
| spi_byte_t txf_rdata; |
| logic txf_underflow; |
| // Write: Main clock |
| logic txf_wvalid, txf_wready; |
| spi_byte_t txf_wdata; |
| logic txf_empty_syncd; |
| |
| // SRAM FIFO control |
| typedef enum int { |
| FwModeRxFifo = 0, |
| FwModeTxFifo = 1 |
| } fwm_fifo_e; |
| logic [7:0] timer_v; // Wait timer inside rxf control |
| logic [PtrW-1:0] sram_rxf_rptr, sram_rxf_wptr; |
| logic [PtrW-1:0] sram_txf_rptr, sram_txf_wptr; |
| logic [PtrW-1:0] sram_rxf_depth, sram_txf_depth; |
| |
| logic [SramAw-1:0] sram_rxf_bindex, sram_txf_bindex; |
| logic [SramAw-1:0] sram_rxf_lindex, sram_txf_lindex; |
| logic [1:0] fwm_sram_req; |
| logic [SramAw-1:0] fwm_sram_addr [2]; |
| logic fwm_sram_write [2]; |
| logic [SramDw-1:0] fwm_sram_wdata [2]; |
| logic [1:0] fwm_sram_gnt; |
| logic [1:0] fwm_sram_rvalid; // RXF doesn't use |
| logic [SramDw-1:0] fwm_sram_rdata [2]; // RXF doesn't use |
| logic [1:0] fwm_sram_error [2]; |
| |
| logic [AsFifoDepthW-1:0] as_txfifo_depth, as_rxfifo_depth; |
| |
| // SPI S2P signals |
| // io_mode: Determine s2p/p2s behavior. As of now, only fwmode exists. |
| // TODO: Add FlashMode IO, passthrough IO |
| io_mode_e io_mode, fw_io_mode; |
| logic s2p_data_valid; |
| spi_byte_t s2p_data; |
| logic [11:0] s2p_bitcnt; |
| |
| logic p2s_valid; |
| spi_byte_t p2s_data; |
| logic p2s_sent; |
| |
| ////////////////////////////////////////////////////////////////////// |
| // Connect phase (between control signals above and register module // |
| ////////////////////////////////////////////////////////////////////// |
| |
| assign cpol = reg2hw.cfg.cpol.q; |
| assign cpha = reg2hw.cfg.cpha.q; |
| assign txorder = reg2hw.cfg.tx_order.q; |
| assign rxorder = reg2hw.cfg.rx_order.q; |
| |
| assign rst_txfifo_reg = reg2hw.control.rst_txfifo.q; |
| assign rst_rxfifo_reg = reg2hw.control.rst_rxfifo.q; |
| |
| assign timer_v = reg2hw.cfg.timer_v.q; |
| |
| assign sram_rxf_bindex = reg2hw.rxf_addr.base.q[SDW+:SramAw]; |
| assign sram_rxf_lindex = reg2hw.rxf_addr.limit.q[SDW+:SramAw]; |
| assign sram_txf_bindex = reg2hw.txf_addr.base.q[SDW+:SramAw]; |
| assign sram_txf_lindex = reg2hw.txf_addr.limit.q[SDW+:SramAw]; |
| |
| assign sram_rxf_rptr = reg2hw.rxf_ptr.rptr.q[PtrW-1:0]; |
| assign hw2reg.rxf_ptr.wptr.d = {{(16-PtrW){1'b0}}, sram_rxf_wptr}; |
| assign hw2reg.rxf_ptr.wptr.de = 1'b1; |
| |
| assign sram_txf_wptr = reg2hw.txf_ptr.wptr.q[PtrW-1:0]; |
| assign hw2reg.txf_ptr.rptr.d = {{(16-PtrW){1'b0}}, sram_txf_rptr}; |
| assign hw2reg.txf_ptr.rptr.de = 1'b1; |
| |
| assign abort = reg2hw.control.abort.q; |
| assign hw2reg.status.abort_done.d = 1'b1; |
| |
| assign hw2reg.status.rxf_empty.d = ~rxf_rvalid; |
| assign hw2reg.status.txf_full.d = ~txf_wready; |
| |
| // SYNC logic required |
| assign hw2reg.status.rxf_full.d = rxf_full_syncd; |
| assign hw2reg.status.txf_empty.d = txf_empty_syncd; |
| |
| // CSb : after 2stage synchronizer |
| assign hw2reg.status.csb.d = csb_syncd; |
| prim_flop_2sync #(.Width(1)) u_sync_csb ( |
| .clk_i, |
| .rst_ni, |
| .d_i(cio_csb_i), |
| .q_o(csb_syncd) |
| ); |
| |
| logic rxf_full_q, txf_empty_q; |
| always_ff @(posedge clk_spi_in_buf or negedge rst_ni) begin |
| if (!rst_ni) rxf_full_q <= 1'b0; |
| else rxf_full_q <= ~rxf_wready; |
| end |
| always_ff @(posedge clk_spi_out_buf or negedge rst_ni) begin |
| if (!rst_ni) txf_empty_q <= 1'b1; |
| else txf_empty_q <= ~txf_rvalid; |
| end |
| prim_flop_2sync #(.Width(1)) u_sync_rxf ( |
| .clk_i, |
| .rst_ni, |
| .d_i(rxf_full_q), |
| .q_o(rxf_full_syncd) |
| ); |
| prim_flop_2sync #(.Width(1), .ResetValue(1'b1)) u_sync_txe ( |
| .clk_i, |
| .rst_ni, |
| .d_i(txf_empty_q), |
| .q_o(txf_empty_syncd) |
| ); |
| |
| assign spi_mode = spi_mode_e'(reg2hw.control.mode.q); |
| |
| // Async FIFO level |
| // rx rdepth, tx wdepth to be in main clock domain |
| assign hw2reg.async_fifo_level.txlvl.d = {{(8-AsFifoDepthW){1'b0}}, as_txfifo_depth}; |
| assign hw2reg.async_fifo_level.rxlvl.d = {{(8-AsFifoDepthW){1'b0}}, as_rxfifo_depth}; |
| |
| // Interrupt |
| |
| // Edge |
| logic sram_rxf_full_q, fwm_rxerr_q; |
| logic sram_rxf_full , fwm_rxerr ; |
| |
| // TODO: Check if CE# deasserted in the middle of bit transfer |
| assign fwm_rxerr = 1'b0; |
| |
| always_ff @(posedge clk_i or negedge rst_ni) begin |
| if (!rst_ni) begin |
| sram_rxf_full_q <= 1'b0; |
| fwm_rxerr_q <= 1'b0; |
| end else begin |
| sram_rxf_full_q <= sram_rxf_full; |
| fwm_rxerr_q <= fwm_rxerr; |
| end |
| end |
| |
| // Interrupt |
| assign intr_sram_rxf_full = ~sram_rxf_full_q & sram_rxf_full; |
| assign intr_fwm_rxerr = ~fwm_rxerr_q & fwm_rxerr; |
| |
| assign rxlvl_d = (sram_rxf_depth >= reg2hw.fifo_level.rxlvl.q[PtrW-1:0]) ; |
| assign txlvl_d = (sram_txf_depth < reg2hw.fifo_level.txlvl.q[PtrW-1:0]) ; |
| |
| always_ff @(posedge clk_i or negedge rst_ni) begin |
| if (!rst_ni) begin |
| rxlvl <= 1'b0; |
| txlvl <= 1'b0; |
| end else begin |
| rxlvl <= rxlvl_d; |
| txlvl <= txlvl_d; |
| end |
| end |
| assign intr_fwm_rxlvl = ~rxlvl && rxlvl_d; |
| assign intr_fwm_txlvl = ~txlvl && txlvl_d; |
| |
| // rxf_overflow |
| // Could trigger lint error for input clock. |
| // It's unavoidable due to the characteristics of SPI intf |
| prim_pulse_sync u_rxf_overflow ( |
| .clk_src_i (clk_spi_in_buf ), |
| .rst_src_ni (rst_ni ), |
| .src_pulse_i (rxf_overflow ), |
| .clk_dst_i (clk_i ), |
| .rst_dst_ni (rst_ni ), |
| .dst_pulse_o (intr_fwm_rxoverflow) |
| ); |
| |
| // txf_underflow |
| // Could trigger lint error for input clock. |
| // It's unavoidable due to the characteristics of SPI intf |
| prim_pulse_sync u_txf_underflow ( |
| .clk_src_i (clk_spi_out_buf ), |
| .rst_src_ni (rst_ni ), |
| .src_pulse_i (txf_underflow ), |
| .clk_dst_i (clk_i ), |
| .rst_dst_ni (rst_ni ), |
| .dst_pulse_o (intr_fwm_txunderflow) |
| ); |
| |
| assign intr_rxlvl_o = reg2hw.intr_enable.rxlvl.q & reg2hw.intr_state.rxlvl.q; |
| assign intr_txlvl_o = reg2hw.intr_enable.txlvl.q & reg2hw.intr_state.txlvl.q; |
| assign intr_rxf_o = reg2hw.intr_enable.rxf.q & reg2hw.intr_state.rxf.q; |
| assign intr_rxerr_o = reg2hw.intr_enable.rxerr.q & reg2hw.intr_state.rxerr.q; |
| assign intr_rxoverflow_o = reg2hw.intr_enable.rxoverflow.q & reg2hw.intr_state.rxoverflow.q; |
| assign intr_txunderflow_o = reg2hw.intr_enable.txunderflow.q & reg2hw.intr_state.txunderflow.q; |
| |
| assign hw2reg.intr_state.rxf.d = 1'b1; |
| assign hw2reg.intr_state.rxf.de = intr_sram_rxf_full | |
| (reg2hw.intr_test.rxf.qe & reg2hw.intr_test.rxf.q); |
| assign hw2reg.intr_state.rxerr.d = 1'b1; |
| assign hw2reg.intr_state.rxerr.de = intr_fwm_rxerr | |
| (reg2hw.intr_test.rxerr.qe & reg2hw.intr_test.rxerr.q); |
| assign hw2reg.intr_state.rxlvl.d = 1'b1; |
| assign hw2reg.intr_state.rxlvl.de = intr_fwm_rxlvl | |
| (reg2hw.intr_test.rxlvl.qe & reg2hw.intr_test.rxlvl.q); |
| assign hw2reg.intr_state.txlvl.d = 1'b1; |
| assign hw2reg.intr_state.txlvl.de = intr_fwm_txlvl | |
| (reg2hw.intr_test.txlvl.qe & reg2hw.intr_test.txlvl.q); |
| assign hw2reg.intr_state.rxoverflow.d = 1'b1; |
| assign hw2reg.intr_state.rxoverflow.de = intr_fwm_rxoverflow | |
| (reg2hw.intr_test.rxoverflow.qe & reg2hw.intr_test.rxoverflow.q); |
| assign hw2reg.intr_state.txunderflow.d = 1'b1; |
| assign hw2reg.intr_state.txunderflow.de = intr_fwm_txunderflow | |
| (reg2hw.intr_test.txunderflow.qe & reg2hw.intr_test.txunderflow.q); |
| |
| ////////////////////////////// |
| // // Clock & reset control // |
| ////////////////////////////// |
| // clk_spi cannot use glitch-free clock mux as clock switching in glitch-free |
| // requires two clocks to propagate clock selection and enable but SPI clock |
| // doesn't exist until it transmits data through SDI |
| logic sck_n; |
| logic rst_spi_n; |
| lc_ctrl_pkg::lc_tx_t [ScanModeUseLast-1:0] scanmode; |
| |
| prim_lc_sync #( |
| .NumCopies(int'(ScanModeUseLast)), |
| .AsyncOn(0) |
| ) u_scanmode_sync ( |
| .clk_i, |
| .rst_ni, |
| .lc_en_i(scanmode_i), |
| .lc_en_o(scanmode) |
| ); |
| |
| prim_clock_inv u_clk_spi ( |
| .clk_i(cio_sck_i), |
| .clk_no(sck_n), |
| .scanmode_i(scanmode[ClkInvSel] == lc_ctrl_pkg::On) |
| ); |
| |
| assign clk_spi_in = (cpha ^ cpol) ? sck_n : cio_sck_i ; |
| assign clk_spi_out = (cpha ^ cpol) ? cio_sck_i : sck_n ; |
| |
| prim_clock_buf u_clk_spi_in_buf( |
| .clk_i (clk_spi_in), |
| .clk_o (clk_spi_in_buf) |
| ); |
| prim_clock_buf u_clk_spi_out_buf( |
| .clk_i (clk_spi_out), |
| .clk_o (clk_spi_out_buf) |
| ); |
| |
| prim_clock_mux2 #( |
| .NoFpgaBufG(1'b1) |
| ) u_csb_rst_scan_mux ( |
| .clk0_i(rst_ni & ~cio_csb_i), |
| .clk1_i(scan_rst_ni), |
| .sel_i(scanmode[CsbRstMuxSel] == lc_ctrl_pkg::On), |
| .clk_o(rst_spi_n) |
| ); |
| |
| prim_clock_mux2 #( |
| .NoFpgaBufG(1'b1) |
| ) u_tx_rst_scan_mux ( |
| .clk0_i(rst_ni & ~rst_txfifo_reg), |
| .clk1_i(scan_rst_ni), |
| .sel_i(scanmode[TxRstMuxSel] == lc_ctrl_pkg::On), |
| .clk_o(rst_txfifo_n) |
| ); |
| |
| prim_clock_mux2 #( |
| .NoFpgaBufG(1'b1) |
| ) u_rx_rst_scan_mux ( |
| .clk0_i(rst_ni & ~rst_rxfifo_reg), |
| .clk1_i(scan_rst_ni), |
| .sel_i(scanmode[RxRstMuxSel] == lc_ctrl_pkg::On), |
| .clk_o(rst_rxfifo_n) |
| ); |
| |
| ////////////////////////////// |
| // SPI_DEVICE mode selector // |
| ////////////////////////////// |
| // This logic chooses appropriate signals based on input SPI_DEVICE mode. |
| // e.g) If FwMode is selected. all data connected to spi_fwmode logic |
| |
| // Assume spi_mode does not change dynamically |
| |
| // io_mode to spi_s2p |
| always_comb begin |
| io_mode = SingleIO; |
| |
| unique case (spi_mode) |
| FwMode: begin |
| io_mode = fw_io_mode; |
| end |
| |
| FlashMode: begin |
| // TODO: Revise when implementing FlashMode |
| io_mode = SingleIO; |
| end |
| |
| PassThrough: begin |
| // TODO: Revise when implementing PassThrough |
| io_mode = SingleIO; |
| end |
| |
| default: begin |
| io_mode = SingleIO; |
| end |
| endcase |
| end |
| `ASSERT_KNOWN(SpiModeKnown_A, spi_mode) |
| |
| |
| |
| //////////////////////////// |
| // SPI Serial to Parallel // |
| //////////////////////////// |
| // TODO: Make full SPI interface |
| // Currently only one line is connected |
| logic [3:0] s2p_si; |
| assign s2p_si = {3'b 0, cio_sdi_i}; |
| spi_s2p u_s2p ( |
| .clk_i (clk_spi_in_buf), |
| .rst_ni (rst_spi_n), |
| |
| // SPI interface |
| .s_i (s2p_si), |
| |
| .data_valid_o (s2p_data_valid), |
| .data_o (s2p_data ), |
| .bitcnt_o (s2p_bitcnt ), |
| |
| // Config (changed dynamically) |
| .order_i (rxorder), |
| .io_mode_i (io_mode) |
| ); |
| |
| |
| // TODO: make full SPI |
| logic [3:0] p2s_so; |
| logic [3:0] p2s_s_en; |
| assign cio_sdo_o = p2s_so[1]; |
| assign cio_sdo_en_o = p2s_s_en[1]; |
| |
| spi_p2s u_p2s ( |
| .clk_i (clk_spi_out_buf), |
| .rst_ni (rst_spi_n), |
| |
| .data_valid_i (p2s_valid), |
| .data_i (p2s_data), |
| .data_sent_o (p2s_sent), |
| |
| .csb_i (cio_csb_i), |
| .s_en_o (p2s_s_en), |
| .s_o (p2s_so), |
| |
| .cpha_i (cpha), |
| .order_i (txorder), |
| .io_mode_i (io_mode) |
| |
| ); |
| |
| ///////////// |
| // FW Mode // |
| ///////////// |
| spi_fwmode u_fwmode ( |
| .mode_i (spi_mode), |
| |
| .rx_wvalid_o (rxf_wvalid), |
| .rx_wready_i (rxf_wready), |
| .rx_data_o (rxf_wdata), |
| |
| .tx_rvalid_i (txf_rvalid), |
| .tx_rready_o (txf_rready), |
| .tx_data_i (txf_rdata), |
| |
| .rx_overflow_o (rxf_overflow), |
| .tx_underflow_o (txf_underflow), |
| |
| // Input from S2P |
| .rx_data_valid_i (s2p_data_valid), |
| .rx_data_i (s2p_data), |
| |
| // Output to S2P (mode select) |
| .io_mode_o (fw_io_mode), |
| |
| // P2S |
| .tx_wvalid_o (p2s_valid), |
| .tx_data_o (p2s_data), |
| .tx_wready_i (p2s_sent) |
| |
| ); |
| |
| // FIFO: Connecting FwMode to SRAM CTRLs |
| prim_fifo_async #( |
| .Width (FifoWidth), |
| .Depth (FifoDepth) |
| ) u_rx_fifo ( |
| .clk_wr_i (clk_spi_in_buf), |
| .rst_wr_ni (rst_rxfifo_n), |
| |
| .clk_rd_i (clk_i), |
| .rst_rd_ni (rst_rxfifo_n), |
| |
| .wvalid_i (rxf_wvalid), |
| .wready_o (rxf_wready), |
| .wdata_i (rxf_wdata), |
| |
| .rvalid_o (rxf_rvalid), |
| .rready_i (rxf_rready), |
| .rdata_o (rxf_rdata), |
| |
| .wdepth_o (), |
| .rdepth_o (as_rxfifo_depth) |
| ); |
| |
| prim_fifo_async #( |
| .Width (FifoWidth), |
| .Depth (FifoDepth) |
| ) u_tx_fifo ( |
| .clk_wr_i (clk_i), |
| .rst_wr_ni (rst_txfifo_n), |
| |
| .clk_rd_i (clk_spi_out_buf), |
| .rst_rd_ni (rst_txfifo_n), |
| |
| .wvalid_i (txf_wvalid), |
| .wready_o (txf_wready), |
| .wdata_i (txf_wdata), |
| |
| .rvalid_o (txf_rvalid), |
| .rready_i (txf_rready), |
| .rdata_o (txf_rdata), |
| |
| .wdepth_o (as_txfifo_depth), |
| .rdepth_o () |
| ); |
| |
| // RX Fifo control (FIFO Read port --> SRAM request) |
| spi_fwm_rxf_ctrl #( |
| .FifoDw (FifoWidth), |
| .SramAw (SramAw), |
| .SramDw (SramDw) |
| ) u_rxf_ctrl ( |
| .clk_i, |
| .rst_ni, |
| |
| .base_index_i (sram_rxf_bindex), |
| .limit_index_i (sram_rxf_lindex), |
| .timer_v (timer_v), |
| .rptr (sram_rxf_rptr), // Given by FW |
| .wptr (sram_rxf_wptr), // to Register interface |
| .depth (sram_rxf_depth), |
| .full (sram_rxf_full), |
| |
| .fifo_valid (rxf_rvalid), |
| .fifo_ready (rxf_rready), |
| .fifo_rdata (rxf_rdata), |
| |
| .sram_req (fwm_sram_req [FwModeRxFifo]), |
| .sram_write (fwm_sram_write [FwModeRxFifo]), |
| .sram_addr (fwm_sram_addr [FwModeRxFifo]), |
| .sram_wdata (fwm_sram_wdata [FwModeRxFifo]), |
| .sram_gnt (fwm_sram_gnt [FwModeRxFifo]), |
| .sram_rvalid (fwm_sram_rvalid[FwModeRxFifo]), |
| .sram_rdata (fwm_sram_rdata [FwModeRxFifo]), |
| .sram_error (fwm_sram_error [FwModeRxFifo]) |
| ); |
| |
| // TX Fifo control (SRAM read request --> FIFO write) |
| spi_fwm_txf_ctrl #( |
| .FifoDw (FifoWidth), |
| .SramAw (SramAw), |
| .SramDw (SramDw) |
| ) u_txf_ctrl ( |
| .clk_i, |
| .rst_ni, |
| |
| .base_index_i (sram_txf_bindex), |
| .limit_index_i (sram_txf_lindex), |
| |
| .abort (abort), |
| .rptr (sram_txf_rptr), // Given by FW |
| .wptr (sram_txf_wptr), // to Register interface |
| .depth (sram_txf_depth), |
| |
| .fifo_valid (txf_wvalid), |
| .fifo_ready (txf_wready), |
| .fifo_wdata (txf_wdata), |
| |
| .sram_req (fwm_sram_req [FwModeTxFifo]), |
| .sram_write (fwm_sram_write [FwModeTxFifo]), |
| .sram_addr (fwm_sram_addr [FwModeTxFifo]), |
| .sram_wdata (fwm_sram_wdata [FwModeTxFifo]), |
| .sram_gnt (fwm_sram_gnt [FwModeTxFifo]), |
| .sram_rvalid (fwm_sram_rvalid[FwModeTxFifo]), |
| .sram_rdata (fwm_sram_rdata [FwModeTxFifo]), |
| .sram_error (fwm_sram_error [FwModeTxFifo]) |
| ); |
| |
| // Arbiter for FIFOs : Connecting between SRAM Ctrls and SRAM interface |
| prim_sram_arbiter #( |
| .N (2), // RXF, TXF |
| .SramDw (SramDw), |
| .SramAw (SramAw) // 2kB |
| ) u_fwmode_arb ( |
| .clk_i, |
| .rst_ni, |
| |
| .req_i (fwm_sram_req), |
| .req_addr_i (fwm_sram_addr), |
| .req_write_i (fwm_sram_write), |
| .req_wdata_i (fwm_sram_wdata), |
| .gnt_o (fwm_sram_gnt), |
| |
| .rsp_rvalid_o (fwm_sram_rvalid), |
| .rsp_rdata_o (fwm_sram_rdata), |
| .rsp_error_o (fwm_sram_error), |
| |
| .sram_req_o (mem_b_req), |
| .sram_addr_o (mem_b_addr), |
| .sram_write_o (mem_b_write), |
| .sram_wdata_o (mem_b_wdata), |
| |
| .sram_rvalid_i(mem_b_rvalid), |
| .sram_rdata_i (mem_b_rdata), |
| .sram_rerror_i(mem_b_rerror) |
| ); |
| |
| tlul_adapter_sram #( |
| .SramAw (SramAw), |
| .SramDw (SramDw), |
| .Outstanding (1), |
| .ByteAccess (0) |
| ) u_tlul2sram ( |
| .clk_i, |
| .rst_ni, |
| |
| .tl_i (tl_sram_h2d [0]), |
| .tl_o (tl_sram_d2h [0]), |
| |
| .req_o (mem_a_req), |
| .gnt_i (mem_a_req), //Always grant when request |
| .we_o (mem_a_write), |
| .addr_o (mem_a_addr), |
| .wdata_o (mem_a_wdata), |
| .wmask_o (), // Not used |
| .rdata_i (mem_a_rdata), |
| .rvalid_i (mem_a_rvalid), |
| .rerror_i (mem_a_rerror) |
| ); |
| |
| // SRAM Wrapper |
| prim_ram_2p_adv #( |
| .Depth (SramDepth), |
| .Width (SramDw), // 32 x 512 --> 2kB |
| .DataBitsPerMask (8), |
| .CfgW (8), |
| |
| .EnableECC (0), |
| .EnableParity (1), |
| .EnableInputPipeline (0), |
| .EnableOutputPipeline(0) |
| ) u_memory_2p ( |
| .clk_i, |
| .rst_ni, |
| .a_req_i (mem_a_req), |
| .a_write_i (mem_a_write), |
| .a_addr_i (mem_a_addr), |
| .a_wdata_i (mem_a_wdata), |
| .a_wmask_i ({SramDw{1'b1}}), |
| .a_rvalid_o (mem_a_rvalid), |
| .a_rdata_o (mem_a_rdata), |
| .a_rerror_o (mem_a_rerror), |
| |
| .b_req_i (mem_b_req), |
| .b_write_i (mem_b_write), |
| .b_addr_i (mem_b_addr), |
| .b_wdata_i (mem_b_wdata), |
| .b_wmask_i ({SramDw{1'b1}}), |
| .b_rvalid_o (mem_b_rvalid), |
| .b_rdata_o (mem_b_rdata), |
| .b_rerror_o (mem_b_rerror), |
| |
| .cfg_i ('0) |
| ); |
| |
| // Register module |
| spi_device_reg_top u_reg ( |
| .clk_i, |
| .rst_ni, |
| |
| .tl_i (tl_i), |
| .tl_o (tl_o), |
| |
| .tl_win_o (tl_sram_h2d), |
| .tl_win_i (tl_sram_d2h), |
| |
| .reg2hw, |
| .hw2reg, |
| |
| .devmode_i (1'b1) |
| ); |
| |
| // make sure scanmode_i is never X (including during reset) |
| `ASSERT_KNOWN(scanmodeKnown, scanmode_i, clk_i, 0) |
| `ASSERT_KNOWN(CioSdoEnOKnown, cio_sdo_en_o) |
| |
| `ASSERT_KNOWN(IntrRxfOKnown, intr_rxf_o ) |
| `ASSERT_KNOWN(IntrRxlvlOKnown, intr_rxlvl_o ) |
| `ASSERT_KNOWN(IntrTxlvlOKnown, intr_txlvl_o ) |
| `ASSERT_KNOWN(IntrRxerrOKnown, intr_rxerr_o ) |
| `ASSERT_KNOWN(IntrRxoverflowOKnown, intr_rxoverflow_o ) |
| `ASSERT_KNOWN(IntrTxunderflowOKnown, intr_txunderflow_o) |
| |
| endmodule |
