core: add ofnode_get_by_phandle() api
[people/ms/u-boot.git] / post / drivers / flash.c
1 /*
2  * Parallel NOR Flash tests
3  *
4  * Copyright (c) 2005-2011 Analog Devices Inc.
5  *
6  * Licensed under the GPL-2 or later.
7  */
8
9 #include <common.h>
10 #include <malloc.h>
11 #include <post.h>
12 #include <flash.h>
13
14 #if CONFIG_POST & CONFIG_SYS_POST_FLASH
15
16 /*
17  * This code will walk over the declared sectors erasing them,
18  * then programming them, then verifying the written contents.
19  * Possible future work:
20  *  - verify sectors before/after are not erased/written
21  *  - verify partial writes (e.g. programming only middle of sector)
22  *  - verify the contents of the erased sector
23  *  - better seed pattern than 0x00..0xff
24  */
25
26 #ifndef CONFIG_SYS_POST_FLASH_NUM
27 # define CONFIG_SYS_POST_FLASH_NUM 0
28 #endif
29 #if CONFIG_SYS_POST_FLASH_START >= CONFIG_SYS_POST_FLASH_END
30 # error "invalid flash block start/end"
31 #endif
32
33 extern flash_info_t flash_info[];
34
35 static void *seed_src_data(void *ptr, ulong *old_len, ulong new_len)
36 {
37         unsigned char *p;
38         ulong i;
39
40         p = ptr = realloc(ptr, new_len);
41         if (!ptr)
42                 return ptr;
43
44         for (i = *old_len; i < new_len; ++i)
45                 p[i] = i;
46
47         *old_len = new_len;
48
49         return ptr;
50 }
51
52 int flash_post_test(int flags)
53 {
54         ulong len;
55         void *src;
56         int ret, n, n_start, n_end;
57         flash_info_t *info;
58
59         /* the output from the common flash layers needs help */
60         puts("\n");
61
62         len = 0;
63         src = NULL;
64         info = &flash_info[CONFIG_SYS_POST_FLASH_NUM];
65         n_start = CONFIG_SYS_POST_FLASH_START;
66         n_end = CONFIG_SYS_POST_FLASH_END;
67
68         for (n = n_start; n < n_end; ++n) {
69                 ulong s_start, s_len, s_off;
70
71                 s_start = info->start[n];
72                 s_len = flash_sector_size(info, n);
73                 s_off = s_start - info->start[0];
74
75                 src = seed_src_data(src, &len, s_len);
76                 if (!src) {
77                         printf("malloc(%#lx) failed\n", s_len);
78                         return 1;
79                 }
80
81                 printf("\tsector %i: %#lx +%#lx", n, s_start, s_len);
82
83                 ret = flash_erase(info, n, n + 1);
84                 if (ret) {
85                         flash_perror(ret);
86                         break;
87                 }
88
89                 ret = write_buff(info, src, s_start, s_len);
90                 if (ret) {
91                         flash_perror(ret);
92                         break;
93                 }
94
95                 ret = memcmp(src, (void *)s_start, s_len);
96                 if (ret) {
97                         printf(" verify failed with %i\n", ret);
98                         break;
99                 }
100         }
101
102         free(src);
103
104         return ret;
105 }
106
107 #endif