/*
   * (c) Copyright 2011 by Tigris Elektronik GmbH
   *
   * Author:
   *  Maximilian Schwerin <mvs@tigris.de>
   *

   * SPDX-License-Identifier:	GPL-2.0+

   */
  
  #include <common.h>
  
  #include <command.h>
  #include <environment.h>
  #include <linux/stddef.h>
  #include <malloc.h>
  #include <search.h>
  #include <errno.h>
  #include <fat.h>
  #include <mmc.h>
  
  char *env_name_spec = "FAT";
  
  env_t *env_ptr;
  
  DECLARE_GLOBAL_DATA_PTR;

  int env_init(void)
  {
  	/* use default */
  	gd->env_addr = (ulong)&default_environment[0];
  	gd->env_valid = 1;
  
  	return 0;
  }
  
  #ifdef CONFIG_CMD_SAVEENV
  int saveenv(void)
  {

  	env_t	env_new;

  	block_dev_desc_t *dev_desc = NULL;

  	disk_partition_t info;
  	int dev, part;

  	int err;

  	loff_t size;

  	err = env_export(&env_new);
  	if (err)
  		return err;

  	part = get_device_and_partition(FAT_ENV_INTERFACE,
  					FAT_ENV_DEVICE_AND_PART,
  					&dev_desc, &info, 1);
  	if (part < 0)

  		return 1;

  	dev = dev_desc->dev;
  	if (fat_set_blk_dev(dev_desc, &info) != 0) {
  		printf("
  ** Unable to use %s %d:%d for saveenv **
  ",
  		       FAT_ENV_INTERFACE, dev, part);

  		return 1;
  	}

  	err = file_fat_write(FAT_ENV_FILE, (void *)&env_new, 0, sizeof(env_t),
  			     &size);

  	if (err == -1) {

  		printf("
  ** Unable to write \"%s\" from %s%d:%d **
  ",
  			FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
  		return 1;
  	}
  
  	puts("done
  ");
  	return 0;
  }
  #endif /* CONFIG_CMD_SAVEENV */
  
  void env_relocate_spec(void)
  {

  	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);

  	block_dev_desc_t *dev_desc = NULL;

  	disk_partition_t info;
  	int dev, part;

  	int err;

  	part = get_device_and_partition(FAT_ENV_INTERFACE,
  					FAT_ENV_DEVICE_AND_PART,
  					&dev_desc, &info, 1);
  	if (part < 0)
  		goto err_env_relocate;
  
  	dev = dev_desc->dev;
  	if (fat_set_blk_dev(dev_desc, &info) != 0) {
  		printf("
  ** Unable to use %s %d:%d for loading the env **
  ",
  		       FAT_ENV_INTERFACE, dev, part);
  		goto err_env_relocate;

  	}

  	err = file_fat_read(FAT_ENV_FILE, buf, CONFIG_ENV_SIZE);

  	if (err == -1) {

  		printf("
  ** Unable to read \"%s\" from %s%d:%d **
  ",
  			FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);

  		goto err_env_relocate;

  	}
  
  	env_import(buf, 1);

  	return;
  
  err_env_relocate:
  	set_default_env(NULL);

  }