1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup lpc32xx_nand_mlc |
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5 | * |
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6 | * @brief lpc32xx_mlc_write_blocks() implementation. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (c) 2010 |
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11 | * embedded brains GmbH |
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12 | * Obere Lagerstr. 30 |
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13 | * D-82178 Puchheim |
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14 | * Germany |
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15 | * <rtems@embedded-brains.de> |
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16 | * |
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17 | * The license and distribution terms for this file may be |
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18 | * found in the file LICENSE in this distribution or at |
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19 | * http://www.rtems.com/license/LICENSE. |
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20 | */ |
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21 | |
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22 | #include <bsp/nand-mlc.h> |
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23 | |
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24 | #include <string.h> |
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25 | |
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26 | #include <bsp.h> |
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27 | |
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28 | static const uint32_t ones_spare [MLC_LARGE_SPARE_WORD_COUNT] = { |
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29 | 0xffffffff, |
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30 | 0xffffffff, |
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31 | 0xffffffff, |
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32 | 0xffffffff, |
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33 | 0xffffffff, |
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34 | 0xffffffff, |
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35 | 0xffffffff, |
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36 | 0xffffffff, |
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37 | 0xffffffff, |
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38 | 0xffffffff, |
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39 | 0xffffffff, |
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40 | 0xffffffff, |
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41 | 0xffffffff, |
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42 | 0xffffffff, |
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43 | 0xffffffff, |
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44 | 0xffffffff |
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45 | }; |
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46 | |
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47 | static void zero_block(uint32_t first_page_of_block, uint32_t pages_per_block) |
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48 | { |
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49 | uint32_t page = 0; |
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50 | |
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51 | for (page = 0; page < pages_per_block; ++page) { |
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52 | lpc32xx_mlc_write_page_with_ecc( |
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53 | first_page_of_block + page, |
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54 | lpc32xx_magic_zero_begin, |
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55 | lpc32xx_magic_zero_begin |
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56 | ); |
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57 | } |
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58 | } |
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59 | |
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60 | static bool is_bad_page( |
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61 | uint32_t first_page_of_block, |
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62 | uint32_t page |
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63 | ) |
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64 | { |
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65 | uint32_t spare [MLC_LARGE_SPARE_WORD_COUNT]; |
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66 | |
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67 | memset(spare, 0, MLC_LARGE_SPARE_SIZE); |
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68 | lpc32xx_mlc_read_page( |
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69 | first_page_of_block + page, |
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70 | lpc32xx_magic_zero_begin, |
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71 | spare |
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72 | ); |
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73 | return lpc32xx_mlc_is_bad_page(spare); |
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74 | } |
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75 | |
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76 | static rtems_status_code erase_block( |
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77 | uint32_t block, |
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78 | uint32_t first_page_of_block, |
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79 | uint32_t pages_per_block |
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80 | ) |
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81 | { |
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82 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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83 | |
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84 | if (is_bad_page(first_page_of_block, 0)) { |
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85 | return RTEMS_IO_ERROR; |
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86 | } |
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87 | |
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88 | if (is_bad_page(first_page_of_block, 1)) { |
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89 | return RTEMS_IO_ERROR; |
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90 | } |
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91 | |
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92 | sc = lpc32xx_mlc_erase_block(block); |
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93 | if (sc != RTEMS_SUCCESSFUL) { |
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94 | zero_block(first_page_of_block, pages_per_block); |
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95 | |
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96 | return RTEMS_IO_ERROR; |
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97 | } |
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98 | |
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99 | return RTEMS_SUCCESSFUL; |
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100 | } |
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101 | |
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102 | rtems_status_code lpc32xx_mlc_write_blocks( |
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103 | uint32_t block_begin, |
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104 | uint32_t block_end, |
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105 | const void *src, |
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106 | size_t src_size, |
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107 | uint32_t *page_data_buffer |
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108 | ) |
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109 | { |
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110 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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111 | uint32_t pages_per_block = lpc32xx_mlc_pages_per_block(); |
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112 | uint32_t block_count = lpc32xx_mlc_block_count(); |
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113 | uint32_t page_size = lpc32xx_mlc_page_size(); |
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114 | uint32_t block = 0; |
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115 | const uint8_t *current = src; |
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116 | const uint8_t *last = current; |
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117 | const uint8_t *end = current + src_size; |
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118 | |
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119 | if (block_begin > block_end || block_end > block_count) { |
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120 | return RTEMS_INVALID_ID; |
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121 | } |
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122 | |
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123 | for (block = block_begin; block != block_end; ++block) { |
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124 | uint32_t first_page_of_block = block * pages_per_block; |
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125 | uint32_t page = 0; |
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126 | |
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127 | sc = erase_block(block, first_page_of_block, pages_per_block); |
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128 | if (sc != RTEMS_SUCCESSFUL) { |
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129 | continue; |
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130 | } |
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131 | |
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132 | for (page = 0; page < pages_per_block; ++page) { |
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133 | uintptr_t remainder = (uintptr_t) end - (uintptr_t) current; |
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134 | size_t delta = remainder < page_size ? remainder : page_size; |
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135 | |
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136 | if (remainder > 0) { |
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137 | memcpy(page_data_buffer, current, delta); |
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138 | sc = lpc32xx_mlc_write_page_with_ecc( |
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139 | first_page_of_block + page, |
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140 | page_data_buffer, |
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141 | ones_spare |
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142 | ); |
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143 | if (sc != RTEMS_SUCCESSFUL) { |
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144 | erase_block(block, first_page_of_block, pages_per_block); |
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145 | zero_block(first_page_of_block, pages_per_block); |
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146 | current = last; |
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147 | continue; |
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148 | } |
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149 | |
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150 | current += delta; |
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151 | } else { |
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152 | goto done; |
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153 | } |
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154 | } |
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155 | |
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156 | last = current; |
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157 | } |
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158 | |
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159 | done: |
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160 | |
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161 | if (current != end) { |
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162 | return RTEMS_IO_ERROR; |
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163 | } |
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164 | |
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165 | return RTEMS_SUCCESSFUL; |
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166 | } |
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