xref: /openbmc/u-boot/post/drivers/flash.c (revision 41582e2e)
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
108