1 files changed, 110 insertions, 0 deletions
diff --git a/env/fat.c b/env/fat.c
new file mode 100644
index 0000000000..b51c920cd4
--- /dev/null
+++ b/env/fat.c
@@ -0,0 +1,110 @@
+/*
+ * (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 <memalign.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;
+	struct blk_desc *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 = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
+					CONFIG_ENV_FAT_DEVICE_AND_PART,
+					&dev_desc, &info, 1);
+	if (part < 0)
+		return 1;
+
+	dev = dev_desc->devnum;
+	if (fat_set_blk_dev(dev_desc, &info) != 0) {
+		printf("\n** Unable to use %s %d:%d for saveenv **\n",
+		       CONFIG_ENV_FAT_INTERFACE, dev, part);
+		return 1;
+	}
+
+	err = file_fat_write(CONFIG_ENV_FAT_FILE, (void *)&env_new, 0, sizeof(env_t),
+			     &size);
+	if (err == -1) {
+		printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
+			CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
+		return 1;
+	}
+
+	puts("done\n");
+	return 0;
+}
+#endif /* CONFIG_CMD_SAVEENV */
+
+void env_relocate_spec(void)
+{
+	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
+	struct blk_desc *dev_desc = NULL;
+	disk_partition_t info;
+	int dev, part;
+	int err;
+
+	part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
+					CONFIG_ENV_FAT_DEVICE_AND_PART,
+					&dev_desc, &info, 1);
+	if (part < 0)
+		goto err_env_relocate;
+
+	dev = dev_desc->devnum;
+	if (fat_set_blk_dev(dev_desc, &info) != 0) {
+		printf("\n** Unable to use %s %d:%d for loading the env **\n",
+		       CONFIG_ENV_FAT_INTERFACE, dev, part);
+		goto err_env_relocate;
+	}
+
+	err = file_fat_read(CONFIG_ENV_FAT_FILE, buf, CONFIG_ENV_SIZE);
+	if (err == -1) {
+		printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
+			CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
+		goto err_env_relocate;
+	}
+
+	env_import(buf, 1);
+	return;
+
+err_env_relocate:
+	set_default_env(NULL);
+}