1 | `timescale 1ns / 1ps |
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2 | ////////////////////////////////////////////////////////////////////////////////// |
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3 | // Company: (C) Athree, 2009 |
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4 | // Engineer: Dmitry Rozhdestvenskiy |
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5 | // Email dmitry.rozhdestvenskiy@srisc.com dmitryr@a3.spb.ru divx4log@narod.ru |
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6 | // |
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7 | // Design Name: Bridge from Wishbone to Altera DDR3 controller |
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8 | // Module Name: wb2altddr3 |
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9 | // Project Name: SPARC SoC single-core |
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10 | // |
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11 | // LICENSE: |
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12 | // This is a Free Hardware Design; you can redistribute it and/or |
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13 | // modify it under the terms of the GNU General Public License |
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14 | // version 2 as published by the Free Software Foundation. |
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15 | // The above named program is distributed in the hope that it will |
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16 | // be useful, but WITHOUT ANY WARRANTY; without even the implied |
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17 | // warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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18 | // See the GNU General Public License for more details. |
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19 | // |
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20 | ////////////////////////////////////////////////////////////////////////////////// |
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21 | |
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22 | module dram_wb( |
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23 | input clk200, |
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24 | input rup, |
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25 | input rdn, |
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26 | |
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27 | input wb_clk_i, |
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28 | input wb_rst_i, |
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29 | |
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30 | input [63:0] wb_dat_i, |
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31 | output reg [63:0] wb_dat_o, |
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32 | input [63:0] wb_adr_i, |
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33 | input [ 7:0] wb_sel_i, |
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34 | input wb_we_i, |
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35 | input wb_cyc_i, |
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36 | input wb_stb_i, |
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37 | output wb_ack_o, |
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38 | output wb_err_o, |
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39 | output wb_rty_o, |
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40 | input wb_cab_i, |
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41 | |
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42 | inout [63:0] ddr3_dq, |
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43 | inout [ 7:0] ddr3_dqs, |
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44 | inout [ 7:0] ddr3_dqs_n, |
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45 | inout ddr3_ck, |
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46 | inout ddr3_ck_n, |
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47 | output ddr3_reset, |
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48 | output [12:0] ddr3_a, |
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49 | output [ 2:0] ddr3_ba, |
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50 | output ddr3_ras_n, |
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51 | output ddr3_cas_n, |
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52 | output ddr3_we_n, |
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53 | output ddr3_cs_n, |
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54 | output ddr3_odt, |
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55 | output ddr3_ce, |
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56 | output [ 7:0] ddr3_dm, |
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57 | |
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58 | output phy_init_done, |
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59 | |
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60 | output [ 7:0] fifo_used, |
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61 | |
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62 | input dcm_locked, |
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63 | input sysrst |
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64 | ); |
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65 | |
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66 | wire [255:0] rd_data_fifo_out; |
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67 | reg [ 23:0] rd_addr_cache; |
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68 | wire [ 71:0] wr_dout; |
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69 | wire [ 31:0] cmd_out; |
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70 | reg wb_stb_i_d; |
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71 | reg [ 31:0] mask_data; |
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72 | |
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73 | wire dram_ready; |
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74 | wire fifo_empty; |
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75 | reg push_tran; |
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76 | |
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77 | //wire [13:0] parallelterminationcontrol; |
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78 | //wire [13:0] seriesterminationcontrol; |
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79 | |
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80 | dram dram_ctrl( |
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81 | .sys_clk(clk200), |
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82 | .sys_rst_n(sysrst), // Resets all |
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83 | .phy_init_done(phy_init_done), |
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84 | .app_wdf_mask_data(mask_data), |
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85 | .app_af_addr(cmd_out[25:2]), |
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86 | .rd_data_valid(rd_data_valid), |
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87 | .rd_data_fifo_out(rd_data_fifo_out), |
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88 | .app_wdf_data(wr_dout[63:0]), |
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89 | |
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90 | // in dubbio |
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91 | .app_wdf_wren(1'b1), |
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92 | .app_af_wren(1'b1), |
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93 | .app_af_afull(), |
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94 | .app_wdf_afull(), |
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95 | .app_af_cmd(), |
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96 | .clk0_tb(), |
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97 | .idly_clk_200(clk200), |
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98 | |
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99 | .rst0_tb(ddr3_reset), |
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100 | .ddr2_dqs(ddr3_dqs), |
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101 | .ddr2_dqs_n(ddr3_dqs_n), |
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102 | .ddr2_ck(ddr3_ck), |
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103 | .ddr2_ck_n(ddr3_ck_n), |
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104 | .ddr2_dq(ddr3_dq), |
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105 | .ddr2_ras_n(ddr3_ras_n), |
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106 | .ddr2_cas_n(ddr3_cas_n), |
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107 | .ddr2_odt(ddr3_odt), |
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108 | .ddr2_cs_n(ddr3_cs_n), |
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109 | .ddr2_cke(ddr3_ce), |
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110 | .ddr2_we_n(ddr3_we_n), |
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111 | .ddr2_ba(ddr3_ba), |
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112 | .ddr2_a(ddr3_a), |
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113 | .ddr2_dm(ddr3_dm) |
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114 | // | |
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115 | //non sostituiti\|/ |
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116 | // V |
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117 | // .phy_clk(ddr_clk), // User clock |
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118 | // .local_ready(dram_ready), |
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119 | // .local_burstbegin(push_tran), |
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120 | // .local_read_req(!cmd_out[31] && push_tran), |
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121 | // .local_write_req(cmd_out[31] && push_tran), |
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122 | // .local_wdata({wr_dout[63:0],wr_dout[63:0],wr_dout[63:0],wr_dout[63:0]}), |
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123 | // .local_size(3'b001) |
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124 | |
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125 | ); |
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126 | |
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127 | /* comment by sal |
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128 | dram dram_ctrl( |
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129 | .pll_ref_clk(clk200), |
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130 | .global_reset_n(sysrst), // Resets all |
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131 | .soft_reset_n(1), // Resets all but PLL |
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132 | |
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133 | .reset_request_n(), // Active when not ready (PLL not locked) |
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134 | .reset_phy_clk_n(), // Reset input sync to phy_clk |
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135 | |
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136 | .phy_clk(ddr_clk), // User clock |
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137 | .dll_reference_clk(), // For external DLL |
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138 | |
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139 | .dqs_delay_ctrl_export(), |
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140 | .aux_scan_clk(), |
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141 | .aux_scan_clk_reset_n(), |
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142 | .aux_full_rate_clk(), |
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143 | .aux_half_rate_clk(), |
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144 | |
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145 | .oct_ctl_rs_value(seriesterminationcontrol), |
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146 | .oct_ctl_rt_value(parallelterminationcontrol), |
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147 | |
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148 | .local_init_done(phy_init_done), |
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149 | |
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150 | .local_ready(dram_ready), |
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151 | .local_address(cmd_out[25:2]), |
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152 | .local_burstbegin(push_tran), |
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153 | .local_read_req(!cmd_out[31] && push_tran), |
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154 | .local_write_req(cmd_out[31] && push_tran), |
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155 | .local_wdata_req(), |
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156 | .local_wdata({wr_dout[63:0],wr_dout[63:0],wr_dout[63:0],wr_dout[63:0]}), |
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157 | .local_be(mask_data), |
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158 | .local_size(3'b001), |
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159 | .local_rdata_valid(rd_data_valid), |
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160 | .local_rdata(rd_data_fifo_out), |
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161 | .local_refresh_ack(), |
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162 | |
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163 | .mem_clk(ddr3_ck), |
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164 | .mem_clk_n(ddr3_ck_n), |
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165 | .mem_reset_n(ddr3_reset), |
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166 | .mem_dq(ddr3_dq), |
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167 | .mem_dqs(ddr3_dqs), |
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168 | .mem_dqsn(ddr3_dqs_n), |
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169 | .mem_odt(ddr3_odt), |
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170 | .mem_cs_n(ddr3_cs_n), |
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171 | .mem_cke(ddr3_ce), |
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172 | .mem_addr(ddr3_a), |
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173 | .mem_ba(ddr3_ba), |
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174 | .mem_ras_n(ddr3_ras_n), |
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175 | .mem_cas_n(ddr3_cas_n), |
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176 | .mem_we_n(ddr3_we_n), |
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177 | .mem_dm(ddr3_dm) |
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178 | ); |
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179 | */ |
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180 | assign ddr_rst=!phy_init_done; |
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181 | |
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182 | /*oct_alt_oct_power_f4c oct |
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183 | ( |
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184 | .parallelterminationcontrol(parallelterminationcontrol), |
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185 | .seriesterminationcontrol(seriesterminationcontrol), |
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186 | .rdn(rdn), |
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187 | .rup(rup) |
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188 | ) ; */ |
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189 | |
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190 | always @( * ) |
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191 | case(cmd_out[1:0]) |
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192 | 2'b00:mask_data<={24'h000000,wr_dout[71:64]}; |
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193 | 2'b01:mask_data<={16'h0000,wr_dout[71:64],8'h00}; |
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194 | 2'b10:mask_data<={8'h00,wr_dout[71:64],16'h0000}; |
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195 | 2'b11:mask_data<={wr_dout[71:64],24'h000000}; |
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196 | endcase |
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197 | |
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198 | //wire [254:0] trig0; |
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199 | |
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200 | /*ila1 ila1_inst ( |
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201 | .CONTROL(CONTROL), |
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202 | .CLK(ddr_clk), |
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203 | .TRIG0(trig0) |
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204 | );*/ |
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205 | |
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206 | /*assign trig0[127:0]=rd_data_fifo_out; |
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207 | assign trig0[199:128]=wr_dout; |
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208 | assign trig0[231:200]=cmd_out; |
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209 | assign trig0[232]=0; |
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210 | assign trig0[233]=0; |
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211 | assign trig0[234]=rd_data_valid; |
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212 | assign trig0[235]=0; |
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213 | assign trig0[236]=fifo_empty; |
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214 | assign trig0[237]=0; |
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215 | assign trig0[238]=0; |
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216 | assign trig0[254:239]=0; |
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217 | */ |
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218 | |
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219 | reg fifo_full_d; |
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220 | reg written; |
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221 | reg fifo_read; |
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222 | |
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223 | dram_fifo fifo( |
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224 | .rst(ddr_rst), |
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225 | .wr_clk(wb_clk_i), |
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226 | .rd_clk(ddr_clk), |
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227 | .din({wb_sel_i,wb_dat_i,wb_we_i,wb_adr_i[33:3]}), |
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228 | .wr_en(wb_cyc_i && wb_stb_i && (!wb_stb_i_d || (fifo_full_d && !written)) && !fifo_full && !(rd_addr_cache==wb_adr_i[28:5] && !wb_we_i)), |
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229 | .full(fifo_full), |
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230 | .rd_en(fifo_read), |
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231 | .dout({wr_dout,cmd_out}), |
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232 | .wr_data_count(fifo_used), |
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233 | .empty(fifo_empty) |
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234 | ); |
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235 | |
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236 | `define DDR_IDLE 3'b000 |
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237 | `define DDR_WRITE_1 3'b001 |
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238 | `define DDR_WRITE_2 3'b010 |
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239 | `define DDR_READ_1 3'b011 |
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240 | `define DDR_READ_2 3'b100 |
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241 | |
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242 | reg [2:0] ddr_state; |
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243 | reg rd_data_valid_stb; |
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244 | reg wb_ack_d1; |
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245 | |
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246 | always @(posedge ddr_clk or posedge ddr_rst) |
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247 | if(ddr_rst) |
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248 | begin |
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249 | ddr_state<=`DDR_IDLE; |
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250 | fifo_read<=0; |
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251 | push_tran<=0; |
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252 | rd_data_valid_stb<=0; |
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253 | end |
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254 | else |
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255 | case(ddr_state) |
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256 | `DDR_IDLE: |
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257 | if(!fifo_empty && dram_ready) |
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258 | begin |
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259 | push_tran<=1; |
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260 | if(cmd_out[31]) |
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261 | begin |
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262 | ddr_state<=`DDR_WRITE_1; |
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263 | fifo_read<=1; |
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264 | end |
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265 | else |
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266 | ddr_state<=`DDR_READ_1; |
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267 | end |
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268 | `DDR_WRITE_1: |
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269 | begin |
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270 | push_tran<=0; |
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271 | fifo_read<=0; |
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272 | ddr_state<=`DDR_WRITE_2; // Protect against FIFO empty signal latency |
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273 | end |
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274 | `DDR_WRITE_2: |
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275 | ddr_state<=`DDR_IDLE; |
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276 | `DDR_READ_1: |
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277 | begin |
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278 | push_tran<=0; |
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279 | if(rd_data_valid) |
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280 | begin |
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281 | rd_data_valid_stb<=1; |
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282 | fifo_read<=1; |
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283 | ddr_state<=`DDR_READ_2; |
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284 | end |
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285 | end |
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286 | `DDR_READ_2: |
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287 | begin |
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288 | fifo_read<=0; |
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289 | if(wb_ack_d1) // Enought delay to protect against FIFO empty signal latency |
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290 | begin |
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291 | rd_data_valid_stb<=0; |
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292 | ddr_state<=`DDR_IDLE; |
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293 | end |
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294 | end |
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295 | endcase |
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296 | |
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297 | reg rd_data_valid_stb_d1; |
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298 | reg rd_data_valid_stb_d2; |
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299 | reg rd_data_valid_stb_d3; |
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300 | reg rd_data_valid_stb_d4; |
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301 | reg [255:0] rd_data_fifo_out_d; |
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302 | reg wb_ack_d; |
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303 | |
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304 | always @( * ) |
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305 | case(wb_adr_i[4:3]) |
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306 | 2'b00:wb_dat_o<=rd_data_fifo_out_d[63:0]; |
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307 | 2'b01:wb_dat_o<=rd_data_fifo_out_d[127:64]; |
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308 | 2'b10:wb_dat_o<=rd_data_fifo_out_d[191:128]; |
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309 | 2'b11:wb_dat_o<=rd_data_fifo_out_d[255:192]; |
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310 | endcase |
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311 | |
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312 | always @(posedge wb_clk_i or posedge wb_rst_i) |
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313 | if(wb_rst_i) |
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314 | rd_addr_cache<=24'hFFFFFF; |
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315 | else |
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316 | begin |
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317 | wb_stb_i_d<=wb_stb_i; |
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318 | if(wb_cyc_i && wb_stb_i) |
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319 | if(!wb_we_i) |
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320 | rd_addr_cache<=wb_ack_o ? wb_adr_i[28:5]:rd_addr_cache; |
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321 | else |
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322 | if(rd_addr_cache==wb_adr_i[28:5]) |
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323 | rd_addr_cache<=24'hFFFFFF; |
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324 | rd_data_valid_stb_d1<=rd_data_valid_stb; |
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325 | rd_data_valid_stb_d2<=rd_data_valid_stb_d1; |
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326 | rd_data_valid_stb_d3<=rd_data_valid_stb_d2; |
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327 | rd_data_valid_stb_d4<=rd_data_valid_stb_d3; |
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328 | fifo_full_d<=fifo_full; |
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329 | if(wb_ack_o) |
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330 | written<=0; |
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331 | else |
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332 | if(!fifo_full && fifo_full_d) |
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333 | written<=1; |
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334 | end |
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335 | |
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336 | assign wb_ack_o=wb_we_i ? (wb_cyc_i && wb_stb_i && !fifo_full):(rd_data_valid_stb_d2 && !rd_data_valid_stb_d3) || (rd_addr_cache==wb_adr_i[28:5]); |
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337 | |
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338 | always @(posedge ddr_clk) |
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339 | begin |
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340 | wb_ack_d<=wb_ack_o; |
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341 | wb_ack_d1<=wb_ack_d; |
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342 | if(rd_data_valid) |
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343 | rd_data_fifo_out_d<=rd_data_fifo_out; |
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344 | end |
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345 | |
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346 | endmodule |
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