SOFA/BENCHMARK/sdc_controller/rtl/sd_controller_wb.v

196 lines
8.5 KiB
Verilog

//////////////////////////////////////////////////////////////////////
//// ////
//// WISHBONE SD Card Controller IP Core ////
//// ////
//// sd_controller_wb.v ////
//// ////
//// This file is part of the WISHBONE SD Card ////
//// Controller IP Core project ////
//// http://opencores.org/project,sd_card_controller ////
//// ////
//// Description ////
//// Wishbone interface responsible for comunication with core ////
//// ////
//// Author(s): ////
//// - Marek Czerski, ma.czerski@gmail.com ////
//// ////
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2013 Authors ////
//// ////
//// Based on original work by ////
//// Adam Edvardsson (adam.edvardsson@orsoc.se) ////
//// ////
//// Copyright (C) 2009 Authors ////
//// ////
//// 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 source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
`include "sd_defines.h"
module sd_controller_wb(
// WISHBONE slave
wb_clk_i, wb_rst_i, wb_dat_i, wb_dat_o,
wb_adr_i, wb_sel_i, wb_we_i, wb_cyc_i, wb_stb_i, wb_ack_o,
cmd_start,
data_int_rst,
cmd_int_rst,
argument_reg,
command_reg,
response_0_reg,
response_1_reg,
response_2_reg,
response_3_reg,
software_reset_reg,
timeout_reg,
block_size_reg,
controll_setting_reg,
cmd_int_status_reg,
cmd_int_enable_reg,
clock_divider_reg,
block_count_reg,
dma_addr_reg,
data_int_status_reg,
data_int_enable_reg
);
// WISHBONE common
input wb_clk_i; // WISHBONE clock
input wb_rst_i; // WISHBONE reset
input [31:0] wb_dat_i; // WISHBONE data input
output reg [31:0] wb_dat_o; // WISHBONE data output
// WISHBONE error output
// WISHBONE slave
input [7:0] wb_adr_i; // WISHBONE address input
input [3:0] wb_sel_i; // WISHBONE byte select input
input wb_we_i; // WISHBONE write enable input
input wb_cyc_i; // WISHBONE cycle input
input wb_stb_i; // WISHBONE strobe input
output reg wb_ack_o; // WISHBONE acknowledge output
output reg cmd_start;
//Buss accessible registers
output reg [31:0] argument_reg;
output reg [`CMD_REG_SIZE-1:0] command_reg;
input wire [31:0] response_0_reg;
input wire [31:0] response_1_reg;
input wire [31:0] response_2_reg;
input wire [31:0] response_3_reg;
output reg [0:0] software_reset_reg;
output reg [15:0] timeout_reg;
output reg [`BLKSIZE_W-1:0] block_size_reg;
output reg [15:0] controll_setting_reg;
input wire [`INT_CMD_SIZE-1:0] cmd_int_status_reg;
output reg [`INT_CMD_SIZE-1:0] cmd_int_enable_reg;
output reg [7:0] clock_divider_reg;
input wire [`INT_DATA_SIZE-1:0] data_int_status_reg;
output reg [`INT_DATA_SIZE-1:0] data_int_enable_reg;
//Register Controll
output reg data_int_rst;
output reg cmd_int_rst;
output reg [`BLKCNT_W-1:0]block_count_reg;
output reg [31:0] dma_addr_reg;
parameter voltage_controll_reg = `SUPPLY_VOLTAGE_mV;
parameter capabilies_reg = 16'b0000_0000_0000_0000;
always @(posedge wb_clk_i or posedge wb_rst_i)
begin
if (wb_rst_i)begin
argument_reg <= 0;
command_reg <= 0;
software_reset_reg <= 0;
timeout_reg <= 0;
block_size_reg <= `RESET_BLOCK_SIZE;
controll_setting_reg <= 0;
cmd_int_enable_reg <= 0;
clock_divider_reg <= `RESET_CLK_DIV;
wb_ack_o <= 0;
cmd_start <= 0;
data_int_rst <= 0;
data_int_enable_reg <= 0;
cmd_int_rst <= 0;
block_count_reg <= 0;
dma_addr_reg <= 0;
end
else
begin
cmd_start <= 1'b0;
data_int_rst <= 0;
cmd_int_rst <= 0;
if ((wb_stb_i & wb_cyc_i) || wb_ack_o)begin
if (wb_we_i) begin
case (wb_adr_i)
`argument: begin
argument_reg <= wb_dat_i;
cmd_start <= 1'b1;
end
`command: command_reg <= wb_dat_i[`CMD_REG_SIZE-1:0];
`reset: software_reset_reg <= wb_dat_i[0];
`timeout: timeout_reg <= wb_dat_i[15:0];
`blksize: block_size_reg <= wb_dat_i[`BLKSIZE_W-1:0];
`controller: controll_setting_reg <= wb_dat_i[15:0];
`cmd_iser: cmd_int_enable_reg <= wb_dat_i[4:0];
`cmd_isr: cmd_int_rst <= 1;
`clock_d: clock_divider_reg <= wb_dat_i[7:0];
`data_isr: data_int_rst <= 1;
`data_iser: data_int_enable_reg <= wb_dat_i[`INT_DATA_SIZE-1:0];
`dst_src_addr: dma_addr_reg <= wb_dat_i;
`blkcnt: block_count_reg <= wb_dat_i[`BLKCNT_W-1:0];
endcase
end
wb_ack_o <= wb_cyc_i & wb_stb_i & ~wb_ack_o;
end
end
end
always @(posedge wb_clk_i or posedge wb_rst_i)begin
if (wb_rst_i == 1)
wb_dat_o <= 0;
else
if (wb_stb_i & wb_cyc_i) begin //CS
case (wb_adr_i)
`argument: wb_dat_o <= argument_reg;
`command: wb_dat_o <= command_reg;
`resp0: wb_dat_o <= response_0_reg;
`resp1: wb_dat_o <= response_1_reg;
`resp2: wb_dat_o <= response_2_reg;
`resp3: wb_dat_o <= response_3_reg;
`controller: wb_dat_o <= controll_setting_reg;
`blksize: wb_dat_o <= block_size_reg;
`voltage: wb_dat_o <= voltage_controll_reg;
`reset: wb_dat_o <= software_reset_reg;
`timeout: wb_dat_o <= timeout_reg;
`cmd_isr: wb_dat_o <= cmd_int_status_reg;
`cmd_iser: wb_dat_o <= cmd_int_enable_reg;
`clock_d: wb_dat_o <= clock_divider_reg;
`capa: wb_dat_o <= capabilies_reg;
`data_isr: wb_dat_o <= data_int_status_reg;
`blkcnt: wb_dat_o <= block_count_reg;
`data_iser: wb_dat_o <= data_int_enable_reg;
`dst_src_addr: wb_dat_o <= dma_addr_reg;
endcase
end
end
endmodule