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_erase_block_safe(), lpc32xx_mlc_erase_block_safe_3(), and |
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7 | * lpc32xx_mlc_zero_block() implementation. |
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8 | */ |
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9 | |
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10 | /* |
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11 | * Copyright (c) 2011 embedded brains GmbH. All rights reserved. |
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12 | * |
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13 | * embedded brains GmbH |
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14 | * Obere Lagerstr. 30 |
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15 | * 82178 Puchheim |
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16 | * Germany |
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17 | * <rtems@embedded-brains.de> |
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18 | * |
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19 | * The license and distribution terms for this file may be |
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20 | * found in the file LICENSE in this distribution or at |
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21 | * http://www.rtems.org/license/LICENSE. |
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22 | */ |
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23 | |
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24 | #include <bsp/nand-mlc.h> |
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25 | |
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26 | #include <string.h> |
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27 | |
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28 | #include <bsp.h> |
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29 | |
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30 | void lpc32xx_mlc_zero_pages(uint32_t page_begin, uint32_t page_end) |
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31 | { |
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32 | uint32_t page = 0; |
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33 | |
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34 | for (page = page_begin; page < page_end; ++page) { |
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35 | lpc32xx_mlc_write_page_with_ecc( |
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36 | page, |
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37 | lpc32xx_magic_zero_begin, |
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38 | lpc32xx_magic_zero_begin |
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39 | ); |
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40 | } |
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41 | } |
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42 | |
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43 | static rtems_status_code is_valid_page( |
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44 | uint32_t page_begin, |
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45 | uint32_t page_offset |
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46 | ) |
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47 | { |
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48 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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49 | uint32_t spare [MLC_LARGE_SPARE_WORD_COUNT]; |
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50 | |
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51 | memset(spare, 0, MLC_LARGE_SPARE_SIZE); |
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52 | |
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53 | sc = lpc32xx_mlc_read_page( |
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54 | page_begin + page_offset, |
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55 | lpc32xx_magic_zero_begin, |
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56 | spare, |
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57 | NULL |
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58 | ); |
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59 | if (sc == RTEMS_SUCCESSFUL) { |
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60 | if (lpc32xx_mlc_is_bad_page(spare)) { |
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61 | sc = RTEMS_INCORRECT_STATE; |
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62 | } |
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63 | } |
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64 | |
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65 | return sc; |
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66 | } |
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67 | |
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68 | static rtems_status_code is_valid_block(uint32_t page_begin) |
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69 | { |
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70 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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71 | |
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72 | if (lpc32xx_mlc_page_size() == 512 && lpc32xx_mlc_io_width() == 8) { |
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73 | sc = is_valid_page(page_begin, 0); |
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74 | if (sc == RTEMS_SUCCESSFUL) { |
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75 | sc = is_valid_page(page_begin, 1); |
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76 | } |
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77 | } else { |
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78 | sc = RTEMS_NOT_IMPLEMENTED; |
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79 | } |
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80 | |
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81 | return sc; |
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82 | } |
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83 | |
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84 | rtems_status_code lpc32xx_mlc_is_valid_block(uint32_t block_index) |
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85 | { |
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86 | uint32_t pages_per_block = lpc32xx_mlc_pages_per_block(); |
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87 | uint32_t page_begin = block_index * pages_per_block; |
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88 | |
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89 | return is_valid_block(page_begin); |
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90 | } |
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91 | |
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92 | rtems_status_code lpc32xx_mlc_erase_block_safe_3( |
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93 | uint32_t block_index, |
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94 | uint32_t page_begin, |
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95 | uint32_t page_end |
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96 | ) |
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97 | { |
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98 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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99 | |
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100 | sc = is_valid_block(page_begin); |
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101 | if (sc == RTEMS_SUCCESSFUL) { |
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102 | sc = lpc32xx_mlc_erase_block(block_index); |
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103 | if (sc == RTEMS_UNSATISFIED) { |
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104 | lpc32xx_mlc_zero_pages(page_begin, page_end); |
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105 | } |
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106 | } |
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107 | |
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108 | return sc; |
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109 | } |
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110 | |
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111 | rtems_status_code lpc32xx_mlc_erase_block_safe(uint32_t block_index) |
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112 | { |
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113 | uint32_t pages_per_block = lpc32xx_mlc_pages_per_block(); |
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114 | uint32_t page_begin = block_index * pages_per_block; |
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115 | uint32_t page_end = page_begin + pages_per_block; |
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116 | |
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117 | return lpc32xx_mlc_erase_block_safe_3( |
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118 | block_index, |
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119 | page_begin, |
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120 | page_end |
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121 | ); |
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122 | } |
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