common/env_fat.c

   1 /*
   2  * (c) Copyright 2011 by Tigris Elektronik GmbH
   3  *
   4  * Author:
   5  *  Maximilian Schwerin <mvs@tigris.de>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11
  12 #include <command.h>
  13 #include <environment.h>
  14 #include <linux/stddef.h>
  15 #include <malloc.h>
  16 #include <search.h>
  17 #include <errno.h>
  18 #include <fat.h>
  19 #include <mmc.h>
  20
  21 char *env_name_spec = "FAT";
  22
  23 env_t *env_ptr;
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 int env_init(void)
  28 {
  29         /* use default */
  30         gd->env_addr = (ulong)&default_environment[0];
  31         gd->env_valid = 1;
  32
  33         return 0;
  34 }
  35
  36 #ifdef CONFIG_CMD_SAVEENV
  37 int saveenv(void)
  38 {
  39         env_t   env_new;
  40         block_dev_desc_t *dev_desc = NULL;
  41         int dev = FAT_ENV_DEVICE;
  42         int part = FAT_ENV_PART;
  43         int err;
  44
  45         err = env_export(&env_new);
  46         if (err)
  47                 return err;
  48
  49 #ifdef CONFIG_MMC
  50         if (strcmp(FAT_ENV_INTERFACE, "mmc") == 0) {
  51                 struct mmc *mmc = find_mmc_device(dev);
  52
  53                 if (!mmc) {
  54                         printf("no mmc device at slot %x\n", dev);
  55                         return 1;
  56                 }
  57
  58                 mmc->has_init = 0;
  59                 mmc_init(mmc);
  60         }
  61 #endif /* CONFIG_MMC */
  62
  63         dev_desc = get_dev(FAT_ENV_INTERFACE, dev);
  64         if (dev_desc == NULL) {
  65                 printf("Failed to find %s%d\n",
  66                         FAT_ENV_INTERFACE, dev);
  67                 return 1;
  68         }
  69
  70         err = fat_register_device(dev_desc, part);
  71         if (err) {
  72                 printf("Failed to register %s%d:%d\n",
  73                         FAT_ENV_INTERFACE, dev, part);
  74                 return 1;
  75         }
  76
  77         err = file_fat_write(FAT_ENV_FILE, (void *)&env_new, sizeof(env_t));
  78         if (err == -1) {
  79                 printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
  80                         FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
  81                 return 1;
  82         }
  83
  84         puts("done\n");
  85         return 0;
  86 }
  87 #endif /* CONFIG_CMD_SAVEENV */
  88
  89 void env_relocate_spec(void)
  90 {
  91         char buf[CONFIG_ENV_SIZE];
  92         block_dev_desc_t *dev_desc = NULL;
  93         int dev = FAT_ENV_DEVICE;
  94         int part = FAT_ENV_PART;
  95         int err;
  96
  97 #ifdef CONFIG_MMC
  98         if (strcmp(FAT_ENV_INTERFACE, "mmc") == 0) {
  99                 struct mmc *mmc = find_mmc_device(dev);
 100
 101                 if (!mmc) {
 102                         printf("no mmc device at slot %x\n", dev);
 103                         set_default_env(NULL);
 104                         return;
 105                 }
 106
 107                 mmc->has_init = 0;
 108                 mmc_init(mmc);
 109         }
 110 #endif /* CONFIG_MMC */
 111
 112         dev_desc = get_dev(FAT_ENV_INTERFACE, dev);
 113         if (dev_desc == NULL) {
 114                 printf("Failed to find %s%d\n",
 115                         FAT_ENV_INTERFACE, dev);
 116                 set_default_env(NULL);
 117                 return;
 118         }
 119
 120         err = fat_register_device(dev_desc, part);
 121         if (err) {
 122                 printf("Failed to register %s%d:%d\n",
 123                         FAT_ENV_INTERFACE, dev, part);
 124                 set_default_env(NULL);
 125                 return;
 126         }
 127
 128         err = file_fat_read(FAT_ENV_FILE, (uchar *)&buf, CONFIG_ENV_SIZE);
 129         if (err == -1) {
 130                 printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
 131                         FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
 132                 set_default_env(NULL);
 133                 return;
 134         }
 135
 136         env_import(buf, 1);
 137 }