[03d2108] | 1 | /** |
---|
| 2 | * @file |
---|
| 3 | * |
---|
| 4 | * @ingroup lpc32xx_nand_mlc |
---|
| 5 | * |
---|
[542d350e] | 6 | * @brief lpc32xx_mlc_erase_block_safe(), lpc32xx_mlc_erase_block_safe_3(), and |
---|
| 7 | * lpc32xx_mlc_zero_block() implementation. |
---|
[03d2108] | 8 | */ |
---|
| 9 | |
---|
| 10 | /* |
---|
| 11 | * Copyright (c) 2011 embedded brains GmbH. All rights reserved. |
---|
| 12 | * |
---|
| 13 | * embedded brains GmbH |
---|
| 14 | * Obere Lagerstr. 30 |
---|
| 15 | * 82178 Puchheim |
---|
| 16 | * Germany |
---|
| 17 | * <rtems@embedded-brains.de> |
---|
| 18 | * |
---|
| 19 | * The license and distribution terms for this file may be |
---|
| 20 | * found in the file LICENSE in this distribution or at |
---|
[c499856] | 21 | * http://www.rtems.org/license/LICENSE. |
---|
[03d2108] | 22 | */ |
---|
| 23 | |
---|
| 24 | #include <bsp/nand-mlc.h> |
---|
| 25 | |
---|
| 26 | #include <string.h> |
---|
| 27 | |
---|
| 28 | #include <bsp.h> |
---|
| 29 | |
---|
[542d350e] | 30 | void lpc32xx_mlc_zero_pages(uint32_t page_begin, uint32_t page_end) |
---|
[03d2108] | 31 | { |
---|
| 32 | uint32_t page = 0; |
---|
| 33 | |
---|
[542d350e] | 34 | for (page = page_begin; page < page_end; ++page) { |
---|
[03d2108] | 35 | lpc32xx_mlc_write_page_with_ecc( |
---|
[542d350e] | 36 | page, |
---|
[03d2108] | 37 | lpc32xx_magic_zero_begin, |
---|
| 38 | lpc32xx_magic_zero_begin |
---|
| 39 | ); |
---|
| 40 | } |
---|
| 41 | } |
---|
| 42 | |
---|
[82525a75] | 43 | static rtems_status_code is_valid_page( |
---|
[542d350e] | 44 | uint32_t page_begin, |
---|
| 45 | uint32_t page_offset |
---|
[03d2108] | 46 | ) |
---|
| 47 | { |
---|
[82525a75] | 48 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
[03d2108] | 49 | uint32_t spare [MLC_LARGE_SPARE_WORD_COUNT]; |
---|
| 50 | |
---|
| 51 | memset(spare, 0, MLC_LARGE_SPARE_SIZE); |
---|
[82525a75] | 52 | |
---|
| 53 | sc = lpc32xx_mlc_read_page( |
---|
[542d350e] | 54 | page_begin + page_offset, |
---|
[03d2108] | 55 | lpc32xx_magic_zero_begin, |
---|
[82525a75] | 56 | spare, |
---|
| 57 | NULL |
---|
[03d2108] | 58 | ); |
---|
[82525a75] | 59 | if (sc == RTEMS_SUCCESSFUL) { |
---|
| 60 | if (lpc32xx_mlc_is_bad_page(spare)) { |
---|
| 61 | sc = RTEMS_INCORRECT_STATE; |
---|
| 62 | } |
---|
| 63 | } |
---|
| 64 | |
---|
| 65 | return sc; |
---|
| 66 | } |
---|
| 67 | |
---|
| 68 | static rtems_status_code is_valid_block(uint32_t page_begin) |
---|
| 69 | { |
---|
| 70 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 71 | |
---|
| 72 | if (lpc32xx_mlc_page_size() == 512 && lpc32xx_mlc_io_width() == 8) { |
---|
| 73 | sc = is_valid_page(page_begin, 0); |
---|
| 74 | if (sc == RTEMS_SUCCESSFUL) { |
---|
| 75 | sc = is_valid_page(page_begin, 1); |
---|
| 76 | } |
---|
| 77 | } else { |
---|
| 78 | sc = RTEMS_NOT_IMPLEMENTED; |
---|
| 79 | } |
---|
| 80 | |
---|
| 81 | return sc; |
---|
| 82 | } |
---|
| 83 | |
---|
| 84 | rtems_status_code lpc32xx_mlc_is_valid_block(uint32_t block_index) |
---|
| 85 | { |
---|
| 86 | uint32_t pages_per_block = lpc32xx_mlc_pages_per_block(); |
---|
| 87 | uint32_t page_begin = block_index * pages_per_block; |
---|
| 88 | |
---|
| 89 | return is_valid_block(page_begin); |
---|
[03d2108] | 90 | } |
---|
| 91 | |
---|
| 92 | rtems_status_code lpc32xx_mlc_erase_block_safe_3( |
---|
| 93 | uint32_t block_index, |
---|
[542d350e] | 94 | uint32_t page_begin, |
---|
| 95 | uint32_t page_end |
---|
[03d2108] | 96 | ) |
---|
| 97 | { |
---|
| 98 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 99 | |
---|
[82525a75] | 100 | sc = is_valid_block(page_begin); |
---|
| 101 | if (sc == RTEMS_SUCCESSFUL) { |
---|
| 102 | sc = lpc32xx_mlc_erase_block(block_index); |
---|
| 103 | if (sc == RTEMS_UNSATISFIED) { |
---|
| 104 | lpc32xx_mlc_zero_pages(page_begin, page_end); |
---|
| 105 | } |
---|
[03d2108] | 106 | } |
---|
| 107 | |
---|
[82525a75] | 108 | return sc; |
---|
[03d2108] | 109 | } |
---|
| 110 | |
---|
| 111 | rtems_status_code lpc32xx_mlc_erase_block_safe(uint32_t block_index) |
---|
| 112 | { |
---|
| 113 | uint32_t pages_per_block = lpc32xx_mlc_pages_per_block(); |
---|
[542d350e] | 114 | uint32_t page_begin = block_index * pages_per_block; |
---|
| 115 | uint32_t page_end = page_begin + pages_per_block; |
---|
[03d2108] | 116 | |
---|
| 117 | return lpc32xx_mlc_erase_block_safe_3( |
---|
| 118 | block_index, |
---|
[542d350e] | 119 | page_begin, |
---|
| 120 | page_end |
---|
[03d2108] | 121 | ); |
---|
| 122 | } |
---|