common/env_ubi.c

   1 /*
   2  * (c) Copyright 2012 by National Instruments,
   3  *        Joe Hershberger <joe.hershberger@ni.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9
  10 #include <command.h>
  11 #include <environment.h>
  12 #include <errno.h>
  13 #include <malloc.h>
  14 #include <memalign.h>
  15 #include <search.h>
  16 #include <ubi_uboot.h>
  17 #undef crc32
  18
  19 char *env_name_spec = "UBI";
  20
  21 env_t *env_ptr;
  22
  23 DECLARE_GLOBAL_DATA_PTR;
  24
  25 int env_init(void)
  26 {
  27         /* use default */
  28         gd->env_addr = (ulong)&default_environment[0];
  29         gd->env_valid = 1;
  30
  31         return 0;
  32 }
  33
  34 #ifdef CONFIG_CMD_SAVEENV
  35 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
  36 static unsigned char env_flags;
  37
  38 int saveenv(void)
  39 {
  40         ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
  41         int ret;
  42
  43         ret = env_export(env_new);
  44         if (ret)
  45                 return ret;
  46
  47         if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
  48                 printf("\n** Cannot find mtd partition \"%s\"\n",
  49                        CONFIG_ENV_UBI_PART);
  50                 return 1;
  51         }
  52
  53         env_new->flags = ++env_flags; /* increase the serial */
  54
  55         if (gd->env_valid == 1) {
  56                 puts("Writing to redundant UBI... ");
  57                 if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME_REDUND,
  58                                      (void *)env_new, CONFIG_ENV_SIZE)) {
  59                         printf("\n** Unable to write env to %s:%s **\n",
  60                                CONFIG_ENV_UBI_PART,
  61                                CONFIG_ENV_UBI_VOLUME_REDUND);
  62                         return 1;
  63                 }
  64         } else {
  65                 puts("Writing to UBI... ");
  66                 if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME,
  67                                      (void *)env_new, CONFIG_ENV_SIZE)) {
  68                         printf("\n** Unable to write env to %s:%s **\n",
  69                                CONFIG_ENV_UBI_PART,
  70                                CONFIG_ENV_UBI_VOLUME);
  71                         return 1;
  72                 }
  73         }
  74
  75         puts("done\n");
  76
  77         gd->env_valid = gd->env_valid == 2 ? 1 : 2;
  78
  79         return 0;
  80 }
  81 #else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
  82 int saveenv(void)
  83 {
  84         ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
  85         int ret;
  86
  87         ret = env_export(env_new);
  88         if (ret)
  89                 return ret;
  90
  91         if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
  92                 printf("\n** Cannot find mtd partition \"%s\"\n",
  93                        CONFIG_ENV_UBI_PART);
  94                 return 1;
  95         }
  96
  97         if (ubi_volume_write(CONFIG_ENV_UBI_VOLUME, (void *)env_new,
  98                              CONFIG_ENV_SIZE)) {
  99                 printf("\n** Unable to write env to %s:%s **\n",
 100                        CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
 101                 return 1;
 102         }
 103
 104         puts("done\n");
 105         return 0;
 106 }
 107 #endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */
 108 #endif /* CONFIG_CMD_SAVEENV */
 109
 110 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
 111 void env_relocate_spec(void)
 112 {
 113         ALLOC_CACHE_ALIGN_BUFFER(char, env1_buf, CONFIG_ENV_SIZE);
 114         ALLOC_CACHE_ALIGN_BUFFER(char, env2_buf, CONFIG_ENV_SIZE);
 115         int crc1_ok = 0, crc2_ok = 0;
 116         env_t *ep, *tmp_env1, *tmp_env2;
 117
 118         tmp_env1 = (env_t *)env1_buf;
 119         tmp_env2 = (env_t *)env2_buf;
 120
 121         if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
 122                 printf("\n** Cannot find mtd partition \"%s\"\n",
 123                        CONFIG_ENV_UBI_PART);
 124                 set_default_env(NULL);
 125                 return;
 126         }
 127
 128         if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)tmp_env1,
 129                             CONFIG_ENV_SIZE)) {
 130                 printf("\n** Unable to read env from %s:%s **\n",
 131                        CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
 132         }
 133
 134         if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME_REDUND, (void *)tmp_env2,
 135                             CONFIG_ENV_SIZE)) {
 136                 printf("\n** Unable to read redundant env from %s:%s **\n",
 137                        CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME_REDUND);
 138         }
 139
 140         crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc;
 141         crc2_ok = crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc;
 142
 143         if (!crc1_ok && !crc2_ok) {
 144                 set_default_env("!bad CRC");
 145                 return;
 146         } else if (crc1_ok && !crc2_ok) {
 147                 gd->env_valid = 1;
 148         } else if (!crc1_ok && crc2_ok) {
 149                 gd->env_valid = 2;
 150         } else {
 151                 /* both ok - check serial */
 152                 if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
 153                         gd->env_valid = 2;
 154                 else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
 155                         gd->env_valid = 1;
 156                 else if (tmp_env1->flags > tmp_env2->flags)
 157                         gd->env_valid = 1;
 158                 else if (tmp_env2->flags > tmp_env1->flags)
 159                         gd->env_valid = 2;
 160                 else /* flags are equal - almost impossible */
 161                         gd->env_valid = 1;
 162         }
 163
 164         if (gd->env_valid == 1)
 165                 ep = tmp_env1;
 166         else
 167                 ep = tmp_env2;
 168
 169         env_flags = ep->flags;
 170         env_import((char *)ep, 0);
 171 }
 172 #else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
 173 void env_relocate_spec(void)
 174 {
 175         ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
 176
 177         if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
 178                 printf("\n** Cannot find mtd partition \"%s\"\n",
 179                        CONFIG_ENV_UBI_PART);
 180                 set_default_env(NULL);
 181                 return;
 182         }
 183
 184         if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)&buf,
 185                             CONFIG_ENV_SIZE)) {
 186                 printf("\n** Unable to read env from %s:%s **\n",
 187                        CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
 188                 set_default_env(NULL);
 189                 return;
 190         }
 191
 192         env_import(buf, 1);
 193 }
 194 #endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */