1 | /* |
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2 | -*- c++ -*- |
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3 | * |
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4 | * SOCLIB_LGPL_HEADER_BEGIN |
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5 | * |
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6 | * This file is part of SoCLib, GNU LGPLv2.1. |
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7 | * |
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8 | * SoCLib is free software; you can redistribute it and/or modify it |
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9 | * under the terms of the GNU Lesser General Public License as published |
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10 | * by the Free Software Foundation; version 2.1 of the License. |
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11 | * |
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12 | * SoCLib is distributed in the hope that it will be useful, but |
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13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 | * Lesser General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU Lesser General Public |
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18 | * License along with SoCLib; if not, write to the Free Software |
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 | * 02110-1301 USA |
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21 | * |
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22 | * SOCLIB_LGPL_HEADER_END |
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23 | * |
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24 | * Copyright (c) UPMC, Lip6, SoC |
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25 | * manuel.bouyer@lip6.fr october 2013 |
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26 | * |
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27 | * Maintainers: bouyer |
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28 | */ |
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29 | |
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30 | #include <stdint.h> |
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31 | #include <errno.h> |
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32 | #include <cstring> |
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33 | #include <iostream> |
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34 | #include <fcntl.h> |
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35 | #include <cassert> |
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36 | #include "sdmmc.h" |
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37 | |
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38 | namespace soclib { namespace caba { |
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39 | |
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40 | using namespace soclib::caba; |
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41 | |
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42 | //////////////////////// |
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43 | void SdMMC::genMealy() |
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44 | { |
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45 | if(p_resetn.read() == false) |
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46 | { |
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47 | spi_fsm = S_IDLE; |
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48 | m_acmd = false; |
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49 | m_sdstate = SD_IDLE; |
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50 | return; |
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51 | } |
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52 | if (p_spi_ss.read()) { |
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53 | if (spi_fsm != S_IDLE) { |
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54 | std::cerr << name() << " deselect but not idle, state " |
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55 | << std::dec << spi_fsm << " last cmd " << (int)command |
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56 | << " args " << std::hex << args << std::dec |
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57 | << " bitcount " << (int)spi_bitcount |
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58 | << " idx " << m_data_idx << " len_snd " << m_datalen_snd |
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59 | << " len_rcv " << m_datalen_rcv << std::endl; |
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60 | } |
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61 | spi_fsm = S_IDLE; |
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62 | spi_clk = p_spi_clk; |
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63 | spi_mosi_previous = p_spi_mosi; |
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64 | return; |
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65 | } |
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66 | |
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67 | switch(spi_fsm) { |
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68 | case S_IDLE: |
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69 | if (p_spi_clk.read() == 1 && spi_clk == 0) { |
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70 | // rising edge |
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71 | command = (command << 1) | spi_mosi_previous; |
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72 | spi_bitcount = 6; |
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73 | spi_fsm = S_RECEIVE_CMD; |
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74 | } |
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75 | break; |
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76 | case S_RECEIVE_CMD: |
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77 | if (p_spi_clk.read() == 1 && spi_clk == 0) { |
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78 | // rising edge |
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79 | command = (command << 1) | spi_mosi_previous; |
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80 | if (spi_bitcount == 0) { |
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81 | if ((command & 0x80) == 0) { |
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82 | spi_fsm = S_RECEIVE_ARGS_START; |
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83 | } else { |
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84 | #ifdef SOCLIB_MODULE_DEBUG0 |
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85 | std::cout << name() << " S_RECEIVE_CMD " << std::hex << (int)command << std::endl; |
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86 | #endif |
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87 | spi_fsm = S_IDLE; |
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88 | } |
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89 | } else { |
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90 | spi_bitcount = spi_bitcount - 1; |
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91 | } |
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92 | } |
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93 | break; |
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94 | case S_RECEIVE_ARGS_START: |
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95 | if (p_spi_clk.read() == 1 && spi_clk == 0) { |
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96 | // rising edge |
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97 | args = (args << 1) | spi_mosi_previous; |
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98 | spi_bitcount = 30; |
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99 | spi_fsm = S_RECEIVE_ARGS; |
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100 | } |
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101 | break; |
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102 | case S_RECEIVE_ARGS: |
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103 | if (p_spi_clk.read() == 1 && spi_clk == 0) { |
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104 | // rising edge |
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105 | args = (args << 1) | spi_mosi_previous; |
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106 | if (spi_bitcount == 0) { |
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107 | spi_bitcount = 7; |
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108 | spi_fsm = S_RECEIVE_CRC; |
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109 | } else { |
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110 | spi_bitcount = spi_bitcount - 1; |
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111 | } |
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112 | } |
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113 | break; |
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114 | case S_RECEIVE_CRC: |
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115 | if (p_spi_clk.read() == 1 && spi_clk == 0) { |
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116 | // rising edge |
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117 | cmdcrc = (cmdcrc << 1) | spi_mosi_previous; |
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118 | if (spi_bitcount == 0) { |
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119 | handle_sdmmc_cmd(command, args); |
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120 | spi_bitcount = 0; // SEND_DATA will reset it |
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121 | spi_fsm = S_SEND_DATA; |
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122 | m_data_idx = 0; |
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123 | } else { |
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124 | spi_bitcount = spi_bitcount - 1; |
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125 | } |
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126 | } |
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127 | break; |
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128 | |
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129 | case S_SEND_DATA: |
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130 | if (p_spi_clk.read() == 0 && spi_clk == 1) { |
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131 | // falling edge |
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132 | if (spi_bitcount == 0) { |
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133 | if (m_data_idx != m_datalen_snd) { |
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134 | spi_shiftreg = m_databuf[m_data_idx]; |
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135 | spi_bitcount = 7; |
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136 | spi_fsm = S_SEND_DATA; |
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137 | m_data_idx++; |
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138 | #ifdef SOCLIB_MODULE_DEBUG0 |
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139 | std::cout << name() << " S_SEND_DATA " << std::dec << m_datalen_snd << " idx " << m_data_idx << " " << std::hex << (uint32_t)m_databuf[m_data_idx] << std::endl; |
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140 | #endif |
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141 | } else if (m_datalen_rcv != 0) { |
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142 | spi_fsm = S_RECEIVE_DATA_WAIT; |
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143 | spi_bitcount = 7; |
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144 | m_data_idx = 0; |
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145 | } else { |
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146 | spi_fsm = S_IDLE; |
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147 | } |
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148 | } else { |
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149 | spi_bitcount = spi_bitcount - 1; |
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150 | spi_shiftreg = spi_shiftreg << 1; |
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151 | } |
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152 | } |
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153 | break; |
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154 | case S_RECEIVE_DATA_WAIT: |
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155 | if (p_spi_clk.read() == 1 && spi_clk == 0) { |
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156 | // rising edge |
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157 | uint8_t s_data; |
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158 | s_data = (m_databuf[0] << 1) | spi_mosi_previous; |
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159 | m_databuf[0] = s_data; |
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160 | if (spi_bitcount == 0) { |
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161 | #ifdef SOCLIB_MODULE_DEBUG |
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162 | std::cout << name() << " S_RECEIVE_DATA_WAIT " << std::dec << (int)s_data << std::endl; |
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163 | #endif |
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164 | spi_bitcount = 7; |
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165 | if (s_data == 0xfe) { // data start token |
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166 | spi_fsm = S_RECEIVE_DATA; |
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167 | m_data_idx = 1; |
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168 | } else { |
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169 | #ifdef SOCLIB_MODULE_DEBUG |
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170 | std::cout << name() << " S_RECEIVE_DATA_WAIT " << std::hex << (int)s_data << std::endl; |
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171 | #endif |
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172 | spi_fsm = S_RECEIVE_DATA_WAIT; |
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173 | } |
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174 | } else { |
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175 | spi_bitcount = spi_bitcount - 1; |
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176 | } |
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177 | } |
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178 | break; |
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179 | case S_RECEIVE_DATA: |
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180 | if (p_spi_clk.read() == 1 && spi_clk == 0) { |
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181 | // rising edge |
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182 | m_databuf[m_data_idx] = (m_databuf[m_data_idx] << 1) | spi_mosi_previous; |
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183 | if (spi_bitcount == 0) { |
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184 | m_data_idx++; |
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185 | if (m_data_idx != m_datalen_rcv) { |
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186 | spi_fsm = S_RECEIVE_DATA; |
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187 | spi_bitcount = 7; |
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188 | } else { |
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189 | handle_sdmmc_write(command, args); |
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190 | if (m_datalen_snd > 0) { |
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191 | spi_bitcount = 0; // SEND_DATA will reset it |
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192 | spi_fsm = S_SEND_DATA; |
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193 | m_data_idx = 0; |
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194 | } else { |
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195 | spi_fsm = S_IDLE; |
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196 | } |
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197 | } |
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198 | } else { |
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199 | spi_bitcount = spi_bitcount - 1; |
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200 | } |
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201 | } |
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202 | break; |
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203 | } |
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204 | |
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205 | //// now genrate output signal |
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206 | |
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207 | switch(spi_fsm) { |
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208 | case S_IDLE: |
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209 | p_spi_miso = !p_spi_ss.read(); |
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210 | break; |
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211 | case S_SEND_DATA: |
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212 | p_spi_miso = (spi_shiftreg & 0x80) != 0; |
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213 | break; |
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214 | default: |
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215 | p_spi_miso = !p_spi_ss.read(); |
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216 | break; |
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217 | } |
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218 | spi_clk = p_spi_clk.read(); |
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219 | spi_mosi_previous = p_spi_mosi; |
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220 | } // end GenMealy() |
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221 | |
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222 | |
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223 | ////////////////////// |
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224 | void SdMMC::handle_sdmmc_cmd(uint8_t cmd, uint32_t data) |
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225 | { |
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226 | m_datalen_rcv = 0; |
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227 | m_databuf[0] = 0x04; // illegal command |
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228 | m_datalen_snd = 1; |
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229 | |
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230 | if (m_sdstate == SD_IDLE) |
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231 | m_databuf[0] |= 0x01; // idle |
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232 | |
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233 | if ((cmd & 0x40) == 0) { |
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234 | //illegal command |
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235 | return; |
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236 | } |
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237 | cmd &= 0x3f; |
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238 | if (m_acmd) { |
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239 | #ifdef SOCLIB_MODULE_DEBUG0 |
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240 | std::cout << name() << " new acmd " << std::dec << (int)cmd << " args " << std::hex << data << " crc " << (int)cmdcrc << std::endl; |
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241 | #endif |
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242 | m_acmd = false; |
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243 | switch (cmd) { |
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244 | case 41: |
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245 | m_databuf[0] = 0x0; // card ready |
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246 | m_datalen_snd = 1; |
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247 | m_sdstate = SD_READY; |
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248 | break; |
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249 | case 51: |
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250 | // send SCR |
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251 | m_databuf[ 0] = (m_sdstate == SD_IDLE) ? 0x1 : 0x0; // R1 |
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252 | m_databuf[ 1] = 0xfe; // data token |
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253 | m_databuf[ 2] = 0x00; // SCR_STRUCTURE / SD_SPEC |
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254 | m_databuf[ 3] = 0x05; // DATA_STAT_AFTER_ERASE, SD_SECURITY, SD_BUS_WIDTHS |
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255 | m_databuf[ 4] = 0; // SD_SPEC3, EX_SECURITY, SD_SPEC4 |
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256 | m_databuf[ 5] = 0; // CMD_SUPPORT |
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257 | m_databuf[ 6] = 0; // vendor specific |
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258 | m_databuf[ 7] = 0; // vendor specific |
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259 | m_databuf[ 8] = 0; // vendor specific |
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260 | m_databuf[ 9] = 0; // vendor specific |
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261 | m_databuf[10] = 0x0; // CRC16 |
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262 | m_databuf[11] = 0x0; // CRC16 |
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263 | m_datalen_snd = 12; |
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264 | break; |
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265 | default: |
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266 | std::cout << name() << " unknown acmd " << std::dec |
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267 | << (int)cmd << std::endl; |
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268 | break; // return illegal command |
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269 | } |
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270 | } else { |
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271 | #ifdef SOCLIB_MODULE_DEBUG0 |
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272 | std::cout << name() << " new cmd " << std::dec << (int)cmd << " args " << std::hex << data << " crc " << (int)cmdcrc << std::endl; |
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273 | #endif |
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274 | switch (cmd) { |
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275 | case 0: |
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276 | m_databuf[0] = 0x1; |
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277 | m_datalen_snd = 1; |
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278 | m_sdstate = SD_IDLE; |
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279 | break; |
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280 | case 8: |
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281 | // reply with illegal command for now |
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282 | break; |
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283 | case 9: |
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284 | { |
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285 | // send CSD |
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286 | // we use a block len of 1024 |
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287 | uint32_t csize = ((m_device_size + (512 * 1024) - 1) / (512 * 1024)) - 1; |
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288 | m_databuf[ 0] = (m_sdstate == SD_IDLE) ? 0x1 : 0x0; // R1 |
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289 | m_databuf[ 1] = 0xfe; // data token |
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290 | m_databuf[ 2] = 0x00; // CSD_STRUCTURE |
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291 | m_databuf[ 3] = 0xe; // TAAC |
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292 | m_databuf[ 4] = 0; // NSAC |
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293 | m_databuf[ 5] = 0x32; // TRAN_SPEED |
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294 | m_databuf[ 6] = 0x5b; // CCC_H |
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295 | m_databuf[ 7] = 0x5a; // CCC_L + READ_BL_LEN |
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296 | m_databuf[ 8] = 0x80; // READ_BL_PARTIAL, R/W_BLK_MISALIGN, DSR_IMP |
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297 | m_databuf[ 8] |= (csize >> 10) & 0x03; // CSIZE[12-11] |
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298 | m_databuf[ 9] = (csize >> 2) & 0xff; // CSIZE[10-2] |
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299 | m_databuf[10] = (csize << 6) & 0xc0; // CSIZE[1-0] |
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300 | m_databuf[10] |= 0; // R_CURR_MIN, R_CURR_MAX |
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301 | m_databuf[11] = 0x3; // W_CURR_MIN, W_CURR_MAX, CSIZE_MULT[2-1]; |
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302 | m_databuf[12] = 0xff; // CSIZE_MULT[1], ERASE_BLK_EN, ERASE_SECTOR_SIZE[6-1] |
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303 | m_databuf[13] = 0x80; // ERASE_SECTOR_SIZE[0]. WP_GRP_SIZE |
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304 | m_databuf[14] = 0x0a; // WP_GRP_ENABLE, R2W_FACTOR, WRITE_BL_LEN[2-3] |
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305 | m_databuf[15] = 0x40; // WRITE_BL_LEN[0-1], WR_BL_PARTIAL |
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306 | m_databuf[16] = 0; // FILE_FORMAT |
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307 | m_databuf[17] = 0x1; // CRC7 |
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308 | m_databuf[18] = 0x0; // CRC16 |
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309 | m_databuf[19] = 0x0; // CRC16 |
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310 | m_datalen_snd = 20; |
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311 | break; |
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312 | } |
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313 | case 10: |
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314 | // send CID |
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315 | m_databuf[ 0] = (m_sdstate == SD_IDLE) ? 0x1 : 0x0; // R1 |
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316 | m_databuf[ 1] = 0xfe; // data token |
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317 | m_databuf[ 2] = 0xda; // MID |
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318 | m_databuf[ 3] = 'P'; // OID |
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319 | m_databuf[ 4] = '6'; // OID |
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320 | m_databuf[ 5] = 's'; // PNM |
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321 | m_databuf[ 6] = 'o'; // PNM |
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322 | m_databuf[ 7] = 'c'; // PNM |
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323 | m_databuf[ 8] = 's'; // PNM |
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324 | m_databuf[ 9] = 'd'; // PNM |
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325 | m_databuf[10] = 0x01; // PRV |
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326 | m_databuf[11] = 0xde; // PSN |
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327 | m_databuf[12] = 0xad; // PSN |
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328 | m_databuf[13] = 0xbe; // PSN |
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329 | m_databuf[14] = 0xef; // PSN |
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330 | m_databuf[15] = 10; // MDT |
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331 | m_databuf[16] = 13; // MDT |
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332 | m_databuf[17] = 0x1; // CRC7 |
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333 | m_databuf[18] = 0x0; // CRC16 |
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334 | m_databuf[19] = 0x0; // CRC16 |
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335 | m_datalen_snd = 20; |
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336 | break; |
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337 | case 16: |
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338 | // set block size |
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339 | if (m_sdstate != SD_IDLE && data == 512) { |
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340 | m_databuf[0] = 0x00; |
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341 | m_datalen_snd = 1; |
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342 | } // else illegal command |
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343 | break; |
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344 | case 17: |
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345 | { |
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346 | int ret; |
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347 | // read data block |
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348 | if (m_sdstate == SD_IDLE) { |
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349 | // return illegal command |
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350 | return; |
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351 | } |
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352 | if (data >= m_device_size) { |
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353 | std::cerr << name() << " read: request " << data |
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354 | << " past end of file " << m_device_size << std::endl; |
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355 | m_databuf[0] = 0x00; // R1 OK |
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356 | m_databuf[1] = 0x08; // error tocken "out of range" |
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357 | m_datalen_snd = 2; |
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358 | return; |
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359 | } |
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360 | do { |
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361 | if (lseek(m_fd, data, SEEK_SET) < 0) { |
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362 | std::cerr << name() << " lseek: " << |
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363 | strerror(errno) << std::endl; |
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364 | m_databuf[0] = 0x00; // R1 OK |
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365 | m_databuf[1] = 0x02; // error tocken "CC err" |
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366 | m_datalen_snd = 2; |
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367 | return; |
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368 | } |
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369 | ret = read(m_fd, &m_databuf[2], 512); |
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370 | } while (ret < 0 && errno == EINTR); |
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371 | if (ret < 0) { |
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372 | std::cerr << name() << " read: " << |
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373 | strerror(errno) << std::endl; |
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374 | m_databuf[0] = 0x00; // R1 OK |
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375 | m_databuf[1] = 0x04; // error tocken "card ECC failed" |
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376 | m_datalen_snd = 2; |
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377 | return; |
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378 | } |
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379 | m_databuf[514] = m_databuf[515] = 0; // XXX CRC |
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380 | m_databuf[0] = 0x0; // R1 |
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381 | m_databuf[1] = 0xfe; // start block tocken |
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382 | m_datalen_snd = 516; |
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383 | break; |
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384 | } |
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385 | case 24: |
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386 | { |
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387 | // write data block |
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388 | if (m_sdstate == SD_IDLE) { |
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389 | // return illegal command |
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390 | return; |
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391 | } |
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392 | #ifdef SOCLIB_MODULE_DEBUG |
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393 | std::cout << name() << " new cmd write " << std::dec << (int)cmd << " args " << std::hex << data << std::endl; |
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394 | #endif |
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395 | m_databuf[0] = 0x0; // R1 |
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396 | m_datalen_snd = 1; |
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397 | m_datalen_rcv = 512 + 2 + 1; // data + tocken + CRC |
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398 | break; |
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399 | } |
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400 | case 55: |
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401 | // app-specific command follow |
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402 | m_acmd = true; |
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403 | m_databuf[0] = (m_sdstate == SD_IDLE) ? 0x1 : 0x0; |
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404 | m_datalen_snd = 1; |
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405 | break; |
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406 | case 58: |
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407 | // send OCR |
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408 | m_databuf[4] = (m_sdstate == SD_IDLE) ? 0x1 : 0x0; // R1 |
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409 | m_databuf[3] = 0x80; // power up complete, SDSC |
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410 | m_databuf[2] = 0xff; // all voltages supported |
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411 | m_databuf[1] = 0x00; |
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412 | m_databuf[0] = 0x00; |
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413 | m_datalen_snd = 5; |
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414 | break; |
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415 | default: |
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416 | std::cout << name() << " unknown cmd " << std::dec |
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417 | << (int)cmd << std::endl; |
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418 | break; // return illegal command |
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419 | } |
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420 | } |
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421 | } |
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422 | |
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423 | void SdMMC::handle_sdmmc_write(uint8_t cmd, uint32_t data) |
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424 | { |
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425 | m_datalen_rcv = 0; |
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426 | cmd &= 0x3f; |
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427 | #ifdef SOCLIB_MODULE_DEBUG |
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428 | std::cout << name() << " cmd write " << std::dec << (int)cmd << " args " << std::hex << data << std::endl; |
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429 | #endif |
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430 | switch(cmd) { |
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431 | case 24: |
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432 | { |
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433 | int ret; |
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434 | // write data block |
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435 | assert(m_sdstate != SD_IDLE && "can't write in idle state"); |
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436 | if (data >= m_device_size) { |
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437 | std::cerr << name() << " write: request " << data |
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438 | << " past end of file " << m_device_size << std::endl; |
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439 | m_databuf[0] = 0xd; // write error |
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440 | m_datalen_snd = 1; |
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441 | return; |
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442 | } |
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443 | do { |
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444 | if (lseek(m_fd, data, SEEK_SET) < 0) { |
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445 | std::cerr << name() << " lseek: " << |
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446 | strerror(errno) << std::endl; |
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447 | m_databuf[0] = 0xd; // write error |
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448 | m_datalen_snd = 1; |
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449 | return; |
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450 | } |
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451 | ret = write(m_fd, &m_databuf[1], 512); |
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452 | } while (ret < 0 && errno == EINTR); |
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453 | if (ret < 0) { |
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454 | std::cerr << name() << " write: " << |
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455 | strerror(errno) << std::endl; |
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456 | m_databuf[0] = 0xd; // write error |
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457 | m_datalen_snd = 1; |
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458 | return; |
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459 | } |
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460 | m_databuf[0] = 0x5; // write complete |
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461 | m_databuf[1] = 0x0; // busy |
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462 | m_datalen_snd = 2; |
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463 | break; |
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464 | } |
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465 | default: |
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466 | std::cerr << name() << " unkown write cmd " << std::dec << |
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467 | (int)cmd << std::endl; |
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468 | m_databuf[0] = 0xd; // write error; |
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469 | m_datalen_snd = 1; |
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470 | } |
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471 | return; |
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472 | } |
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473 | |
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474 | ////////////////////////////////////////////////////////////////////////////// |
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475 | SdMMC::SdMMC( sc_core::sc_module_name name, |
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476 | const std::string &filename, |
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477 | const uint32_t latency) |
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478 | |
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479 | : caba::BaseModule(name), |
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480 | m_latency(latency), |
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481 | p_clk("p_clk"), |
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482 | p_resetn("p_resetn"), |
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483 | p_spi_ss("p_spi_ss"), |
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484 | p_spi_clk("p_spi_clk"), |
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485 | p_spi_mosi("p_spi_mosi"), |
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486 | p_spi_miso("p_spi_miso") |
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487 | { |
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488 | std::cout << " - Building SdMMC " << name << std::endl; |
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489 | |
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490 | SC_METHOD(genMealy); |
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491 | dont_initialize(); |
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492 | sensitive << p_clk.neg(); |
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493 | sensitive << p_resetn; |
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494 | sensitive << p_spi_ss; |
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495 | sensitive << p_spi_clk; |
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496 | |
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497 | m_fd = ::open(filename.c_str(), O_RDWR); |
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498 | if ( m_fd < 0 ) |
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499 | { |
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500 | std::cout << "Error in component SdMMC : " << name |
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501 | << " Unable to open file " << filename << std::endl; |
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502 | exit(1); |
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503 | } |
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504 | m_device_size = lseek(m_fd, 0, SEEK_END); |
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505 | |
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506 | } // end constructor |
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507 | |
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508 | SdMMC::~SdMMC() |
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509 | { |
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510 | } |
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511 | |
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512 | |
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513 | ////////////////////////// |
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514 | void SdMMC::print_trace() |
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515 | { |
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516 | const char* spi_str[] = |
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517 | { |
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518 | "S_IDLE", |
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519 | "S_RECEIVE_CMD", |
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520 | "S_RECEIVE_ARGS_START", |
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521 | "S_RECEIVE_ARGS", |
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522 | "S_RECEIVE_CRC", |
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523 | "S_RECEIVE_DATA_START", |
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524 | "S_RECEIVE_DATA", |
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525 | "S_SEND_DATA", |
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526 | "S_NOP", |
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527 | }; |
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528 | if (spi_clk != p_spi_clk.read()) { |
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529 | std::cout << name() << " SPI_FSM : " << spi_str[spi_fsm] |
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530 | << std::dec |
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531 | << " clk " << spi_clk << "->" << p_spi_clk << " ss " << p_spi_ss |
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532 | << " mosi " << p_spi_mosi << " miso " << p_spi_miso |
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533 | << std::endl; |
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534 | std::cout << " spi_shiftreg: " << std::hex << (int)spi_shiftreg |
---|
535 | << " spi_bitcount: " << (int)spi_bitcount |
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536 | << std::endl; |
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537 | } |
---|
538 | } |
---|
539 | }} // end namespace |
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540 | |
---|
541 | // Local Variables: |
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542 | // tab-width: 4 |
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543 | // c-basic-offset: 4 |
---|
544 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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545 | // indent-tabs-mode: nil |
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546 | // End: |
---|
547 | |
---|
548 | // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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549 | |
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