1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @ingroup lpc32xx_nand_mlc |
---|
5 | * |
---|
6 | * @brief lpc32xx_mlc_erase_block_safe() and lpc32xx_mlc_erase_block_safe_3() |
---|
7 | * implementation. |
---|
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 |
---|
21 | * http://www.rtems.com/license/LICENSE. |
---|
22 | */ |
---|
23 | |
---|
24 | #include <bsp/nand-mlc.h> |
---|
25 | |
---|
26 | #include <string.h> |
---|
27 | |
---|
28 | #include <bsp.h> |
---|
29 | |
---|
30 | static void zero_block(uint32_t first_page_of_block, uint32_t pages_per_block) |
---|
31 | { |
---|
32 | uint32_t page = 0; |
---|
33 | |
---|
34 | for (page = 0; page < pages_per_block; ++page) { |
---|
35 | lpc32xx_mlc_write_page_with_ecc( |
---|
36 | first_page_of_block + page, |
---|
37 | lpc32xx_magic_zero_begin, |
---|
38 | lpc32xx_magic_zero_begin |
---|
39 | ); |
---|
40 | } |
---|
41 | } |
---|
42 | |
---|
43 | static bool is_bad_page( |
---|
44 | uint32_t first_page_of_block, |
---|
45 | uint32_t page |
---|
46 | ) |
---|
47 | { |
---|
48 | uint32_t spare [MLC_LARGE_SPARE_WORD_COUNT]; |
---|
49 | |
---|
50 | memset(spare, 0, MLC_LARGE_SPARE_SIZE); |
---|
51 | lpc32xx_mlc_read_page( |
---|
52 | first_page_of_block + page, |
---|
53 | lpc32xx_magic_zero_begin, |
---|
54 | spare |
---|
55 | ); |
---|
56 | return lpc32xx_mlc_is_bad_page(spare); |
---|
57 | } |
---|
58 | |
---|
59 | rtems_status_code lpc32xx_mlc_erase_block_safe_3( |
---|
60 | uint32_t block_index, |
---|
61 | uint32_t first_page_of_block, |
---|
62 | uint32_t pages_per_block |
---|
63 | ) |
---|
64 | { |
---|
65 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
66 | |
---|
67 | if (is_bad_page(first_page_of_block, 0)) { |
---|
68 | return RTEMS_INCORRECT_STATE; |
---|
69 | } |
---|
70 | |
---|
71 | if (is_bad_page(first_page_of_block, 1)) { |
---|
72 | return RTEMS_INCORRECT_STATE; |
---|
73 | } |
---|
74 | |
---|
75 | sc = lpc32xx_mlc_erase_block(block_index); |
---|
76 | if (sc != RTEMS_SUCCESSFUL) { |
---|
77 | zero_block(first_page_of_block, pages_per_block); |
---|
78 | |
---|
79 | return RTEMS_IO_ERROR; |
---|
80 | } |
---|
81 | |
---|
82 | return RTEMS_SUCCESSFUL; |
---|
83 | } |
---|
84 | |
---|
85 | rtems_status_code lpc32xx_mlc_erase_block_safe(uint32_t block_index) |
---|
86 | { |
---|
87 | uint32_t pages_per_block = lpc32xx_mlc_pages_per_block(); |
---|
88 | |
---|
89 | return lpc32xx_mlc_erase_block_safe_3( |
---|
90 | block_index, |
---|
91 | block_index * pages_per_block, |
---|
92 | pages_per_block |
---|
93 | ); |
---|
94 | } |
---|