| ////////////////////////////////////////////////////////////////////////////// |
| // SPDX-FileCopyrightText: 2021 , Dinesh Annayya |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // SPDX-License-Identifier: Apache-2.0 |
| // SPDX-FileContributor: Created by Dinesh Annayya <dinesha@opencores.org> |
| // |
| ////////////////////////////////////////////////////////////////////// |
| //// //// |
| //// Pinmux //// |
| //// //// |
| //// //// |
| //// Description //// |
| //// Manages all the pin multiplexing //// |
| //// //// |
| //// To Do: //// |
| //// nothing //// |
| //// //// |
| //// Author(s): //// |
| //// - Dinesh Annayya, dinesha@opencores.org //// |
| //// //// |
| //// Revision : //// |
| //// 0.1 - 01th Jan 2022, Dinesh A //// |
| //// Seperated the pinmux from pinmux_top module //// |
| //// SSPI Slave Integrated |
| ////////////////////////////////////////////////////////////////////// |
| |
| module pinmux( |
| |
| //----------------------------------------------------------------------- |
| // MAC-Tx Signal |
| //----------------------------------------------------------------------- |
| output logic mac_tx_clk , |
| input logic mac_tx_en , |
| input logic mac_tx_er , |
| input logic [7:0] mac_txd , |
| |
| //----------------------------------------------------------------------- |
| // MAC-Rx Signal |
| //----------------------------------------------------------------------- |
| output logic mac_rx_clk , |
| output logic mac_rx_er , |
| output logic mac_rx_dv , |
| output logic [7:0] mac_rxd , |
| output logic mac_crs , |
| |
| |
| //----------------------------------------------------------------------- |
| // MDIO Signal |
| //----------------------------------------------------------------------- |
| input logic mdio_clk , |
| output logic mdio_in , |
| input logic mdio_out_en , |
| input logic mdio_out , |
| |
| //------------------------------------- |
| // Master UART TXD |
| //------------------------------------- |
| output logic uartm_rxd , |
| input logic uartm_txd , |
| |
| //------------------------------------- |
| // SPI SLAVE |
| //------------------------------------- |
| output logic spis_sck, |
| output logic spis_ssn, |
| input logic spis_miso, |
| output logic spis_mosi, |
| |
| //------------------------------------- |
| // External IO |
| //------------------------------------- |
| input logic [37:0] io_in , |
| output logic [37:0] io_out , |
| output logic [37:0] io_oeb |
| |
| ); |
| |
| /*********************************************************** |
| PinMux Structure |
| |
| digital_io[5] - MAC-TX_CLK - IN - Need cross-check spec |
| digital_io[6] - MAC-TX_EN - OUT |
| digital_io[7] - MAC-TX_ER - OUT |
| digital_io[8] - MAC-TX_DATA[0] - OUT |
| digital_io[9] - MAC-TX_DATA[1] - OUT |
| digital_io[10] - MAC-TX_DATA[2] - OUT |
| digital_io[11] - MAC-TX_DATA[3] - OUT |
| |
| digital_io[12] - MAC-RX_CLK - IN |
| digital_io[13] - MAC-RX_DV - IN |
| digital_io[14] - MAC-RX_ER - IN |
| digital_io[15] - MAC-RX_CRS - IN |
| digital_io[16] - MAC-RX_DATA[0] - IN |
| digital_io[17] - MAC-RX_DATA[1] - IN |
| digital_io[18] - MAC-RX_DATA[2] - IN |
| digital_io[19] - MAC-RX_DATA[3] - IN |
| digital_io[20] - MAC-MDIC - OUT |
| digital_io[21] - MAC-MDID - IO |
| |
| digital_io[22] - SSN - IN |
| digital_io[23] - MOSI - IN |
| digital_io[24] - MISO - OUT |
| digital_io[25] - SCK - IN |
| |
| |
| digital_io[35] - UARTM-TXD - OUT |
| digital_io[36] - UARTM-RXD - IN |
| |
| ***********************************************************/ |
| |
| // digitial_in* mapping |
| always_comb |
| begin |
| |
| mac_rxd = 'b0; |
| |
| // digital_io[5] - MAC-TX_CLK |
| mac_tx_clk = io_in[5]; |
| |
| // digital_io[12] - MAC-RX_CLK |
| mac_rx_clk = io_in[12]; |
| |
| // digital_io[13] - MAC-RX_DV |
| mac_rx_dv = io_in[13]; |
| |
| // digital_io[14] - MAC-RX_ER |
| mac_rx_er = io_in[14]; |
| |
| // digital_io[15] - MAC-RX_CRS |
| mac_crs = io_in[15]; |
| |
| // digital_io[16] - MAC-RX_DATA[0] |
| mac_rxd[0]= io_in[16]; |
| |
| // digital_io[17] - MAC-RX_DATA[1] |
| mac_rxd[1]= io_in[17]; |
| |
| // digital_io[18] - MAC-RX_DATA[2] |
| mac_rxd[2]= io_in[18]; |
| |
| // digital_io[19] - MAC-RX_DATA[3] |
| mac_rxd[3]= io_in[19]; |
| |
| // digital_io[20] - MAC-MDIC |
| //mdio_clk = io_in[20]; |
| |
| // digital_io[21] - MAC-MDID |
| mdio_in = io_in[21]; |
| |
| //digital_io[22] - SSN - IN |
| spis_ssn = io_in[22]; |
| |
| //digital_io[23] - MOSI - IN |
| spis_mosi = io_in[23]; |
| |
| //digital_io[25] - SCK - IN |
| spis_sck = io_in[25]; |
| |
| // digital_io[36] - UARTM-RXD |
| uartm_rxd = io_in[36]; |
| |
| end |
| |
| // digitial_out* mapping |
| always_comb |
| begin |
| |
| io_out = 'h0; |
| |
| // digital_io[6] - MAC-TX_EN |
| io_out[6] = mac_tx_en; |
| |
| // digital_io[7] - MAC-TX_ER |
| io_out[7] = mac_tx_er; |
| |
| // digital_io[8] - MAC-TX_DATA[0] |
| io_out[8] = mac_txd[0]; |
| |
| // digital_io[9] - MAC-TX_DATA[1] |
| io_out[9] = mac_txd[1]; |
| |
| // digital_io[10] - MAC-TX_DATA[2] |
| io_out[10] = mac_txd[2]; |
| |
| // digital_io[11] - MAC-TX_DATA[3] |
| io_out[11] = mac_txd[3]; |
| |
| |
| // digital_io[20] - MAC-MDIC |
| io_out[20] = mdio_clk; |
| |
| // digital_io[21] - MAC-MDID |
| io_out[21] = mdio_out; |
| |
| |
| // digital_io[24] - MISO - OUT |
| io_out[24] = spis_miso; |
| |
| // digital_io[35] - UARTM-TXD |
| io_out[35] = uartm_txd; |
| end |
| |
| // digitial_oeb* mapping |
| always_comb |
| begin |
| io_oeb = {38{1'b1}}; |
| |
| // digital_io[5] - MAC-TX_CLK - IN - Need cross-check spec |
| io_oeb[5] = 1'b1; |
| |
| // digital_io[6] - MAC-TX_EN - OUT |
| io_oeb[6] = 1'b0; |
| |
| // digital_io[7] - MAC-TX_ER - OUT |
| io_oeb[7] = 1'b0; |
| |
| // digital_io[8] - MAC-TX_DATA[0] - OUT |
| io_oeb[8] = 1'b0; |
| |
| //digital_io[9] - MAC-TX_DATA[1] - OUT |
| io_oeb[9] = 1'b0; |
| |
| //digital_io[10] - MAC-TX_DATA[2] - OUT |
| io_oeb[10] = 1'b0; |
| |
| //digital_io[11] - MAC-TX_DATA[3] - OUT |
| io_oeb[11] = 1'b0; |
| |
| //digital_io[12] - MAC-RX_CLK - IN |
| io_oeb[12] = 1'b1; |
| |
| //digital_io[13] - MAC-RX_DV - IN |
| io_oeb[13] = 1'b1; |
| |
| //digital_io[14] - MAC-RX_ER - IN |
| io_oeb[14] = 1'b1; |
| |
| //digital_io[15] - MAC-RX_CRS - IN |
| io_oeb[15] = 1'b1; |
| |
| //digital_io[16] - MAC-RX_DATA[0] - IN |
| io_oeb[16] = 1'b1; |
| |
| //digital_io[17] - MAC-RX_DATA[1] - IN |
| io_oeb[17] = 1'b1; |
| |
| //digital_io[18] - MAC-RX_DATA[2] - IN |
| io_oeb[18] = 1'b1; |
| |
| //digital_io[19] - MAC-RX_DATA[3] - IN |
| io_oeb[19] = 1'b1; |
| |
| //digital_io[20] - MAC-MDIC - OUT |
| io_oeb[20] = 1'b0; |
| |
| //digital_io[21] - MAC-MDID - IO |
| io_oeb[21] = mdio_out_en; |
| |
| |
| //digital_io[22] - SSN - IN |
| io_oeb[22] = 1'b1; |
| |
| //digital_io[23] - MOSI - IN |
| io_oeb[23] = 1'b1; |
| |
| //digital_io[24] - MISO - OUT |
| io_oeb[24] = 1'b0; |
| |
| //digital_io[25] - SCK - IN |
| io_oeb[25] = 1'b1; |
| |
| //digital_io[35] - UARTM-TXD - OUT |
| io_oeb[35] = 1'b0; |
| |
| //digital_io[36] - UARTM-RXD - IN |
| io_oeb[36] = 1'b1; |
| |
| end |
| |
| endmodule |
