1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/**
* @file
*
* @ingroup lpc32xx_nand_mlc
*
* @brief lpc32xx_mlc_erase_block_safe(), lpc32xx_mlc_erase_block_safe_3(), and
* lpc32xx_mlc_zero_block() implementation.
*/
/*
* Copyright (c) 2011 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#include <bsp/nand-mlc.h>
#include <string.h>
#include <bsp.h>
void lpc32xx_mlc_zero_pages(uint32_t page_begin, uint32_t page_end)
{
uint32_t page = 0;
for (page = page_begin; page < page_end; ++page) {
lpc32xx_mlc_write_page_with_ecc(
page,
lpc32xx_magic_zero_begin,
lpc32xx_magic_zero_begin
);
}
}
static bool is_bad_page(
uint32_t page_begin,
uint32_t page_offset
)
{
uint32_t spare [MLC_LARGE_SPARE_WORD_COUNT];
memset(spare, 0, MLC_LARGE_SPARE_SIZE);
lpc32xx_mlc_read_page(
page_begin + page_offset,
lpc32xx_magic_zero_begin,
spare
);
return lpc32xx_mlc_is_bad_page(spare);
}
rtems_status_code lpc32xx_mlc_erase_block_safe_3(
uint32_t block_index,
uint32_t page_begin,
uint32_t page_end
)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
if (is_bad_page(page_begin, 0)) {
return RTEMS_INCORRECT_STATE;
}
if (is_bad_page(page_begin, 1)) {
return RTEMS_INCORRECT_STATE;
}
sc = lpc32xx_mlc_erase_block(block_index);
if (sc != RTEMS_SUCCESSFUL) {
lpc32xx_mlc_zero_pages(page_begin, page_end);
return RTEMS_IO_ERROR;
}
return RTEMS_SUCCESSFUL;
}
rtems_status_code lpc32xx_mlc_erase_block_safe(uint32_t block_index)
{
uint32_t pages_per_block = lpc32xx_mlc_pages_per_block();
uint32_t page_begin = block_index * pages_per_block;
uint32_t page_end = page_begin + pages_per_block;
return lpc32xx_mlc_erase_block_safe_3(
block_index,
page_begin,
page_end
);
}
|
