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