diff --git a/board/samsung/trats2/trats2.c b/board/samsung/trats2/trats2.c
index 32fb699..d9de862 100644
--- a/board/samsung/trats2/trats2.c
+++ b/board/samsung/trats2/trats2.c
@@ -45,6 +45,8 @@
 #include <power/max77693_fg.h>
 #include <libtizen.h>
 #include <errno.h>
+#include <usb/s3c_udc.h>
+#include <usb_mass_storage.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -326,6 +328,75 @@ int board_mmc_init(bd_t *bis)
 	return err;
 }
 
+#ifdef CONFIG_USB_GADGET
+static int s5pc210_phy_control(int on)
+{
+	int ret = 0;
+	unsigned int val;
+
+	struct pmic *p = pmic_get("MAX77686_PMIC");
+	if (!p)
+		return -ENODEV;
+
+	if (pmic_probe(p))
+		return -1;
+
+	if (on) {
+		ret = max77686_set_ldo_mode(p, 12, OPMODE_ON);
+
+		p = pmic_get("MAX77693_PMIC");
+		pmic_probe(p);
+		if (pmic_probe(p))
+			return -1;
+
+		/* SAFEOUT */
+		ret |= pmic_reg_read(p, MAX77693_SAFEOUT, &val);
+		val |= MAX77693_ENSAFEOUT1;
+		ret |= pmic_reg_write(p, MAX77693_SAFEOUT, val);
+
+		p = pmic_get("MAX77693_MUIC");
+		if (pmic_probe(p))
+			return -1;
+
+		/* PATH: USB */
+		ret |= pmic_reg_write(p, MAX77693_MUIC_CONTROL1,
+			MAX77693_MUIC_CTRL1_DN1DP2);
+
+	} else {
+		ret |= max77686_set_ldo_mode(p, 12, OPMODE_LPM);
+
+		p = pmic_get("MAX77693_MUIC");
+		if (pmic_probe(p))
+			return -1;
+
+		/* PATH: UART */
+		ret |= pmic_reg_write(p, MAX77693_MUIC_CONTROL1,
+			MAX77693_MUIC_CTRL1_UT1UR2);
+	}
+
+	if (ret) {
+		puts("MAX77693 setting error!\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+struct s3c_plat_otg_data s5pc210_otg_data = {
+	.phy_control	= s5pc210_phy_control,
+	.regs_phy	= EXYNOS4X12_USBPHY_BASE,
+	.regs_otg	= EXYNOS4X12_USBOTG_BASE,
+	.usb_phy_ctrl	= EXYNOS4X12_USBPHY_CONTROL,
+	.usb_flags	= PHY0_SLEEP,
+};
+
+void board_usb_init(void)
+{
+	debug("USB_udc_probe\n");
+	s3c_udc_probe(&s5pc210_otg_data);
+}
+#endif
+
 static int pmic_init_max77686(void)
 {
 	struct pmic *p = pmic_get("MAX77686_PMIC");
@@ -525,3 +596,65 @@ int misc_init_r(void)
 	return 0;
 }
 #endif
+
+#ifdef CONFIG_USB_GADGET_MASS_STORAGE
+static int ums_read_sector(struct ums_device *ums_dev,
+			   ulong start, lbaint_t blkcnt, void *buf)
+{
+	if (ums_dev->mmc->block_dev.block_read(ums_dev->dev_num,
+			start + ums_dev->offset, blkcnt, buf) != blkcnt)
+		return -1;
+
+	return 0;
+}
+
+static int ums_write_sector(struct ums_device *ums_dev,
+			    ulong start, lbaint_t blkcnt, const void *buf)
+{
+	if (ums_dev->mmc->block_dev.block_write(ums_dev->dev_num,
+			start + ums_dev->offset, blkcnt, buf) != blkcnt)
+		return -1;
+
+	return 0;
+}
+
+static void ums_get_capacity(struct ums_device *ums_dev,
+			     long long int *capacity)
+{
+	long long int tmp_capacity;
+
+	tmp_capacity = (long long int) ((ums_dev->offset + ums_dev->part_size)
+					* SECTOR_SIZE);
+	*capacity = ums_dev->mmc->capacity - tmp_capacity;
+}
+
+static struct ums_board_info ums_board = {
+	.read_sector = ums_read_sector,
+	.write_sector = ums_write_sector,
+	.get_capacity = ums_get_capacity,
+	.name = "TRATS2 UMS disk",
+	.ums_dev = {
+		.mmc = NULL,
+		.dev_num = 0,
+		.offset = 0,
+		.part_size = 0.
+	},
+};
+
+struct ums_board_info *board_ums_init(unsigned int dev_num, unsigned int offset,
+				      unsigned int part_size)
+{
+	struct mmc *mmc;
+
+	mmc = find_mmc_device(dev_num);
+	if (!mmc)
+		return NULL;
+
+	ums_board.ums_dev.mmc = mmc;
+	ums_board.ums_dev.dev_num = dev_num;
+	ums_board.ums_dev.offset = offset;
+	ums_board.ums_dev.part_size = part_size;
+
+	return &ums_board;
+}
+#endif
diff --git a/include/configs/trats2.h b/include/configs/trats2.h
index 5637734..8f86d8c 100644
--- a/include/configs/trats2.h
+++ b/include/configs/trats2.h
@@ -133,6 +133,16 @@
 #define CONFIG_CMD_EXT4
 #define CONFIG_CMD_EXT4_WRITE
 
+/* USB Composite download gadget - g_dnl */
+#define CONFIG_USBDOWNLOAD_GADGET
+#define CONFIG_DFU_FUNCTION
+#define CONFIG_DFU_MMC
+
+/* USB Samsung's IDs */
+#define CONFIG_G_DNL_VENDOR_NUM 0x04E8
+#define CONFIG_G_DNL_PRODUCT_NUM 0x6601
+#define CONFIG_G_DNL_MANUFACTURER "Samsung"
+
 /* To use the TFTPBOOT over USB, Please enable the CONFIG_CMD_NET */
 #undef CONFIG_CMD_NET
 
@@ -288,6 +298,10 @@
 #define CONFIG_POWER_MUIC_MAX77693
 #define CONFIG_POWER_FG_MAX77693
 #define CONFIG_POWER_BATTERY_TRATS2
+#define CONFIG_USB_GADGET
+#define CONFIG_USB_GADGET_S3C_UDC_OTG
+#define CONFIG_USB_GADGET_DUALSPEED
+#define CONFIG_USB_GADGET_VBUS_DRAW	2
 
 /* PWM */
 #define CONFIG_PWM
@@ -306,4 +320,9 @@
 #define CONFIG_VIDEO_BMP_GZIP
 #define CONFIG_SYS_VIDEO_LOGO_MAX_SIZE ((500 * 250 * 4) + (1 << 12))
 
+#define CONFIG_CMD_USB_MASS_STORAGE
+#if defined(CONFIG_CMD_USB_MASS_STORAGE)
+#define CONFIG_USB_GADGET_MASS_STORAGE
+#endif
+
 #endif	/* __CONFIG_H */
