1 files changed, 129 insertions, 0 deletions
diff --git a/env/ext4.c b/env/ext4.c
new file mode 100644
index 0000000000..adefa7dc99
--- /dev/null
+++ b/env/ext4.c
@@ -0,0 +1,129 @@
+/*
+ * (c) Copyright 2016 by VRT Technology
+ *
+ * Author:
+ *  Stuart Longland <stuartl@vrt.com.au>
+ *
+ * Based on FAT environment driver
+ * (c) Copyright 2011 by Tigris Elektronik GmbH
+ *
+ * Author:
+ *  Maximilian Schwerin <mvs@tigris.de>
+ *
+ * and EXT4 filesystem implementation
+ * (C) Copyright 2011 - 2012 Samsung Electronics
+ * EXT4 filesystem implementation in Uboot by
+ * Uma Shankar <uma.shankar@samsung.com>
+ * Manjunatha C Achar <a.manjunatha@samsung.com>
+ *
+ * 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 <ext4fs.h>
+#include <mmc.h>
+
+char *env_name_spec = "EXT4";
+
+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;
+
+	err = env_export(&env_new);
+	if (err)
+		return err;
+
+	part = blk_get_device_part_str(EXT4_ENV_INTERFACE,
+					EXT4_ENV_DEVICE_AND_PART,
+					&dev_desc, &info, 1);
+	if (part < 0)
+		return 1;
+
+	dev = dev_desc->devnum;
+	ext4fs_set_blk_dev(dev_desc, &info);
+
+	if (!ext4fs_mount(info.size)) {
+		printf("\n** Unable to use %s %s for saveenv **\n",
+		       EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
+		return 1;
+	}
+
+	err = ext4fs_write(EXT4_ENV_FILE, (void *)&env_new, sizeof(env_t));
+	ext4fs_close();
+
+	if (err == -1) {
+		printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
+			EXT4_ENV_FILE, EXT4_ENV_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;
+	loff_t off;
+
+	part = blk_get_device_part_str(EXT4_ENV_INTERFACE,
+					EXT4_ENV_DEVICE_AND_PART,
+					&dev_desc, &info, 1);
+	if (part < 0)
+		goto err_env_relocate;
+
+	dev = dev_desc->devnum;
+	ext4fs_set_blk_dev(dev_desc, &info);
+
+	if (!ext4fs_mount(info.size)) {
+		printf("\n** Unable to use %s %s for loading the env **\n",
+		       EXT4_ENV_INTERFACE, EXT4_ENV_DEVICE_AND_PART);
+		goto err_env_relocate;
+	}
+
+	err = ext4_read_file(EXT4_ENV_FILE, buf, 0, CONFIG_ENV_SIZE, &off);
+	ext4fs_close();
+
+	if (err == -1) {
+		printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
+			EXT4_ENV_FILE, EXT4_ENV_INTERFACE, dev, part);
+		goto err_env_relocate;
+	}
+
+	env_import(buf, 1);
+	return;
+
+err_env_relocate:
+	set_default_env(NULL);
+}