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_read_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.org/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 | static rtems_status_code read_page( |
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27 | uint32_t first_page_of_block, |
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28 | uint32_t page, |
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29 | uint32_t page_data [MLC_LARGE_DATA_WORD_COUNT], |
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30 | uint32_t page_spare [MLC_LARGE_SPARE_WORD_COUNT] |
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31 | ) |
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32 | { |
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33 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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34 | uint32_t page_index = first_page_of_block + page; |
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35 | bool possible_bad_page = page == 0 || page == 1; |
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36 | |
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37 | if (possible_bad_page) { |
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38 | memset(page_spare, 0, MLC_LARGE_SPARE_SIZE); |
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39 | } |
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40 | |
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41 | sc = lpc32xx_mlc_read_page(page_index, page_data, page_spare, NULL); |
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42 | if (possible_bad_page && lpc32xx_mlc_is_bad_page(page_spare)) { |
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43 | return RTEMS_UNSATISFIED; |
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44 | } else if (sc == RTEMS_SUCCESSFUL) { |
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45 | return RTEMS_SUCCESSFUL; |
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46 | } else { |
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47 | return sc; |
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48 | } |
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49 | } |
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50 | |
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51 | rtems_status_code lpc32xx_mlc_read_blocks( |
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52 | uint32_t block_begin, |
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53 | uint32_t block_end, |
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54 | lpc32xx_mlc_read_process process, |
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55 | void *process_arg, |
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56 | uint32_t page_buffer_0 [MLC_LARGE_DATA_WORD_COUNT], |
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57 | uint32_t page_buffer_1 [MLC_LARGE_DATA_WORD_COUNT] |
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58 | ) |
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59 | { |
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60 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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61 | uint32_t page_spare_0 [MLC_LARGE_SPARE_WORD_COUNT]; |
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62 | uint32_t page_spare_1 [MLC_LARGE_SPARE_WORD_COUNT]; |
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63 | uint32_t pages_per_block = lpc32xx_mlc_pages_per_block(); |
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64 | uint32_t page_size = lpc32xx_mlc_page_size(); |
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65 | uint32_t block = 0; |
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66 | uint32_t first_page_of_block = block_begin * pages_per_block; |
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67 | |
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68 | for ( |
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69 | block = block_begin; |
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70 | block != block_end; |
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71 | ++block, first_page_of_block += pages_per_block |
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72 | ) { |
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73 | uint32_t page = 0; |
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74 | bool done = false; |
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75 | |
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76 | sc = read_page(first_page_of_block, 0, page_buffer_0, page_spare_0); |
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77 | if (sc == RTEMS_UNSATISFIED) { |
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78 | continue; |
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79 | } else if (sc != RTEMS_SUCCESSFUL) { |
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80 | goto done; |
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81 | } |
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82 | |
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83 | sc = read_page(first_page_of_block, 1, page_buffer_1, page_spare_1); |
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84 | if (sc == RTEMS_UNSATISFIED) { |
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85 | continue; |
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86 | } else if (sc != RTEMS_SUCCESSFUL) { |
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87 | goto done; |
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88 | } |
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89 | |
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90 | done = (*process)( |
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91 | process_arg, |
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92 | first_page_of_block + 0, |
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93 | page_size, |
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94 | page_buffer_0, |
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95 | page_spare_0 |
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96 | ); |
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97 | if (done) { |
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98 | goto done; |
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99 | } |
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100 | |
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101 | done = (*process)( |
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102 | process_arg, |
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103 | first_page_of_block + 1, |
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104 | page_size, |
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105 | page_buffer_1, |
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106 | page_spare_1 |
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107 | ); |
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108 | if (done) { |
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109 | goto done; |
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110 | } |
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111 | |
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112 | for (page = 2; page < pages_per_block; ++page) { |
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113 | sc = read_page(first_page_of_block, page, page_buffer_1, page_spare_1); |
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114 | if (sc != RTEMS_SUCCESSFUL) { |
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115 | goto done; |
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116 | } |
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117 | |
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118 | done = (*process)( |
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119 | process_arg, |
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120 | first_page_of_block + page, |
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121 | page_size, |
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122 | page_buffer_1, |
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123 | page_spare_1 |
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124 | ); |
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125 | if (done) { |
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126 | goto done; |
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127 | } |
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128 | } |
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129 | } |
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130 | |
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131 | done: |
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132 | |
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133 | return sc; |
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134 | } |
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