[3103d4cb] | 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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[c499856] | 19 | * http://www.rtems.org/license/LICENSE. |
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[3103d4cb] | 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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[b2ed712] | 24 | #include <string.h> |
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| 25 | |
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[3103d4cb] | 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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[82525a75] | 41 | sc = lpc32xx_mlc_read_page(page_index, page_data, page_spare, NULL); |
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[3103d4cb] | 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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