diff --git a/include/drivers/usb_device.h b/include/drivers/usb_device.h
new file mode 100644
index 0000000..e21e315
--- /dev/null
+++ b/include/drivers/usb_device.h
@@ -0,0 +1,276 @@
+/*
+ * Copyright (c) 2021, STMicroelectronics - All Rights Reserved
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef USB_DEVICE_H
+#define USB_DEVICE_H
+
+#include <stdint.h>
+
+#include <lib/utils_def.h>
+
+#define USBD_MAX_NUM_INTERFACES			1U
+#define USBD_MAX_NUM_CONFIGURATION		1U
+
+#define USB_LEN_DEV_QUALIFIER_DESC		0x0AU
+#define USB_LEN_DEV_DESC			0x12U
+#define USB_LEN_CFG_DESC			0x09U
+#define USB_LEN_IF_DESC				0x09U
+#define USB_LEN_EP_DESC				0x07U
+#define USB_LEN_OTG_DESC			0x03U
+#define USB_LEN_LANGID_STR_DESC			0x04U
+#define USB_LEN_OTHER_SPEED_DESC_SIZ		0x09U
+
+#define USBD_IDX_LANGID_STR			0x00U
+#define USBD_IDX_MFC_STR			0x01U
+#define USBD_IDX_PRODUCT_STR			0x02U
+#define USBD_IDX_SERIAL_STR			0x03U
+#define USBD_IDX_CONFIG_STR			0x04U
+#define USBD_IDX_INTERFACE_STR			0x05U
+#define USBD_IDX_USER0_STR			0x06U
+
+#define USB_REQ_TYPE_STANDARD			0x00U
+#define USB_REQ_TYPE_CLASS			0x20U
+#define USB_REQ_TYPE_VENDOR			0x40U
+#define USB_REQ_TYPE_MASK			0x60U
+
+#define USB_REQ_RECIPIENT_DEVICE		0x00U
+#define USB_REQ_RECIPIENT_INTERFACE		0x01U
+#define USB_REQ_RECIPIENT_ENDPOINT		0x02U
+#define USB_REQ_RECIPIENT_MASK			0x1FU
+
+#define USB_REQ_DIRECTION			0x80U
+
+#define USB_REQ_GET_STATUS			0x00U
+#define USB_REQ_CLEAR_FEATURE			0x01U
+#define USB_REQ_SET_FEATURE			0x03U
+#define USB_REQ_SET_ADDRESS			0x05U
+#define USB_REQ_GET_DESCRIPTOR			0x06U
+#define USB_REQ_SET_DESCRIPTOR			0x07U
+#define USB_REQ_GET_CONFIGURATION		0x08U
+#define USB_REQ_SET_CONFIGURATION		0x09U
+#define USB_REQ_GET_INTERFACE			0x0AU
+#define USB_REQ_SET_INTERFACE			0x0BU
+#define USB_REQ_SYNCH_FRAME			0x0CU
+
+#define USB_DESC_TYPE_DEVICE			0x01U
+#define USB_DESC_TYPE_CONFIGURATION		0x02U
+#define USB_DESC_TYPE_STRING			0x03U
+#define USB_DESC_TYPE_INTERFACE			0x04U
+#define USB_DESC_TYPE_ENDPOINT			0x05U
+#define USB_DESC_TYPE_DEVICE_QUALIFIER		0x06U
+#define USB_DESC_TYPE_OTHER_SPEED_CONFIGURATION	0x07U
+#define USB_DESC_TYPE_BOS			0x0FU
+
+#define USB_CONFIG_REMOTE_WAKEUP		2U
+#define USB_CONFIG_SELF_POWERED			1U
+
+#define USB_MAX_EP0_SIZE			64U
+
+/* Device Status */
+#define USBD_STATE_DEFAULT			1U
+#define USBD_STATE_ADDRESSED			2U
+#define USBD_STATE_CONFIGURED			3U
+#define USBD_STATE_SUSPENDED			4U
+
+/* EP0 State */
+#define USBD_EP0_IDLE				0U
+#define USBD_EP0_SETUP				1U
+#define USBD_EP0_DATA_IN			2U
+#define USBD_EP0_DATA_OUT			3U
+#define USBD_EP0_STATUS_IN			4U
+#define USBD_EP0_STATUS_OUT			5U
+#define USBD_EP0_STALL				6U
+
+#define USBD_EP_TYPE_CTRL			0U
+#define USBD_EP_TYPE_ISOC			1U
+#define USBD_EP_TYPE_BULK			2U
+#define USBD_EP_TYPE_INTR			3U
+
+#define  USBD_OUT_EPNUM_MASK			GENMASK(15, 0)
+#define  USBD_OUT_COUNT_MASK			GENMASK(31, 16)
+#define  USBD_OUT_COUNT_SHIFT			16U
+
+/* Number of EP supported, allow to reduce footprint: default max = 15 */
+#ifndef CONFIG_USBD_EP_NB
+#define  USBD_EP_NB				15U
+#else
+#define  USBD_EP_NB				CONFIG_USBD_EP_NB
+#endif
+
+#define LOBYTE(x)	((uint8_t)((x) & 0x00FF))
+#define HIBYTE(x)	((uint8_t)(((x) & 0xFF00) >> 8))
+
+struct usb_setup_req {
+	uint8_t bm_request;
+	uint8_t b_request;
+	uint16_t value;
+	uint16_t index;
+	uint16_t length;
+};
+
+struct usb_handle;
+
+struct usb_class {
+	uint8_t (*init)(struct usb_handle *pdev, uint8_t cfgidx);
+	uint8_t (*de_init)(struct usb_handle *pdev, uint8_t cfgidx);
+	/* Control Endpoints */
+	uint8_t (*setup)(struct usb_handle *pdev, struct usb_setup_req *req);
+	uint8_t (*ep0_tx_sent)(struct usb_handle *pdev);
+	uint8_t (*ep0_rx_ready)(struct usb_handle *pdev);
+	/* Class Specific Endpoints */
+	uint8_t (*data_in)(struct usb_handle *pdev, uint8_t epnum);
+	uint8_t (*data_out)(struct usb_handle *pdev, uint8_t epnum);
+	uint8_t (*sof)(struct usb_handle *pdev);
+	uint8_t (*iso_in_incomplete)(struct usb_handle *pdev, uint8_t epnum);
+	uint8_t (*iso_out_incomplete)(struct usb_handle *pdev, uint8_t epnum);
+};
+
+/* Following USB Device status */
+enum usb_status {
+	USBD_OK = 0U,
+	USBD_BUSY,
+	USBD_FAIL,
+	USBD_TIMEOUT
+};
+
+/* Action to do after IT handling */
+enum usb_action {
+	USB_NOTHING = 0U,
+	USB_DATA_OUT,
+	USB_DATA_IN,
+	USB_SETUP,
+	USB_ENUM_DONE,
+	USB_READ_DATA_PACKET,
+	USB_READ_SETUP_PACKET,
+	USB_RESET,
+	USB_RESUME,
+	USB_SUSPEND,
+	USB_LPM,
+	USB_SOF,
+	USB_DISCONNECT,
+	USB_WRITE_EMPTY
+};
+
+/* USB Device descriptors structure */
+struct usb_desc {
+	uint8_t *(*get_device_desc)(uint16_t *length);
+	uint8_t *(*get_lang_id_desc)(uint16_t *length);
+	uint8_t *(*get_manufacturer_desc)(uint16_t *length);
+	uint8_t *(*get_product_desc)(uint16_t *length);
+	uint8_t *(*get_serial_desc)(uint16_t *length);
+	uint8_t *(*get_configuration_desc)(uint16_t *length);
+	uint8_t *(*get_interface_desc)(uint16_t *length);
+	uint8_t *(*get_usr_desc)(uint8_t index, uint16_t *length);
+	uint8_t *(*get_config_desc)(uint16_t *length);
+	uint8_t *(*get_device_qualifier_desc)(uint16_t *length);
+};
+
+/* USB Device handle structure */
+struct usb_endpoint {
+	uint32_t status;
+	uint32_t total_length;
+	uint32_t rem_length;
+	uint32_t maxpacket;
+};
+
+/*
+ * EndPoint descriptor
+ * num : Endpoint number, between 0 and 15 (limited by USBD_EP_NB)
+ * is_in: Endpoint direction
+ * type : Endpoint type
+ * maxpacket:  Endpoint Max packet size: between 0 and 64KB
+ * xfer_buff: Pointer to transfer buffer
+ * xfer_len: Current transfer lengt
+ * hxfer_count: Partial transfer length in case of multi packet transfer
+ */
+struct usbd_ep {
+	uint8_t num;
+	bool is_in;
+	uint8_t type;
+	uint32_t maxpacket;
+	uint8_t *xfer_buff;
+	uint32_t xfer_len;
+	uint32_t xfer_count;
+};
+
+enum pcd_lpm_state {
+	LPM_L0 = 0x00U, /* on */
+	LPM_L1 = 0x01U, /* LPM L1 sleep */
+	LPM_L2 = 0x02U, /* suspend */
+	LPM_L3 = 0x03U, /* off */
+};
+
+/* USB Device descriptors structure */
+struct usb_driver {
+	enum usb_status (*ep0_out_start)(void *handle);
+	enum usb_status (*ep_start_xfer)(void *handle, struct usbd_ep *ep);
+	enum usb_status (*ep0_start_xfer)(void *handle, struct usbd_ep *ep);
+	enum usb_status (*write_packet)(void *handle, uint8_t *src,
+				     uint8_t ch_ep_num, uint16_t len);
+	void *(*read_packet)(void *handle, uint8_t *dest, uint16_t len);
+	enum usb_status (*ep_set_stall)(void *handle, struct usbd_ep *ep);
+	enum usb_status (*start_device)(void *handle);
+	enum usb_status (*stop_device)(void *handle);
+	enum usb_status (*set_address)(void *handle, uint8_t address);
+	enum usb_status (*write_empty_tx_fifo)(void *handle,
+					    uint32_t epnum, uint32_t xfer_len,
+					    uint32_t *xfer_count,
+					    uint32_t maxpacket,
+					    uint8_t **xfer_buff);
+	enum usb_action (*it_handler)(void *handle, uint32_t *param);
+};
+
+/* USB Peripheral Controller Drivers */
+struct pcd_handle {
+	void *instance; /* Register base address */
+	struct usbd_ep in_ep[USBD_EP_NB]; /* IN endpoint parameters */
+	struct usbd_ep out_ep[USBD_EP_NB]; /* OUT endpoint parameters */
+	uint32_t setup[12]; /* Setup packet buffer */
+	enum pcd_lpm_state lpm_state; /* LPM State */
+};
+
+/* USB Device handle structure */
+struct usb_handle {
+	uint8_t id;
+	uint32_t dev_config;
+	uint32_t dev_config_status;
+	struct usb_endpoint ep_in[USBD_EP_NB];
+	struct usb_endpoint ep_out[USBD_EP_NB];
+	uint32_t ep0_state;
+	uint32_t ep0_data_len;
+	uint8_t dev_state;
+	uint8_t dev_old_state;
+	uint8_t dev_address;
+	uint32_t dev_remote_wakeup;
+	struct usb_setup_req request;
+	const struct usb_desc *desc;
+	struct usb_class *class;
+	void *class_data;
+	void *user_data;
+	struct pcd_handle *data;
+	const struct usb_driver *driver;
+};
+
+enum usb_status usb_core_handle_it(struct usb_handle *pdev);
+enum usb_status usb_core_receive(struct usb_handle *pdev, uint8_t ep_addr,
+				 uint8_t *p_buf, uint32_t len);
+enum usb_status usb_core_transmit(struct usb_handle *pdev, uint8_t ep_addr,
+				  uint8_t *p_buf, uint32_t len);
+enum usb_status usb_core_receive_ep0(struct usb_handle *pdev, uint8_t *p_buf,
+				     uint32_t len);
+enum usb_status usb_core_transmit_ep0(struct usb_handle *pdev, uint8_t *p_buf,
+				      uint32_t len);
+void usb_core_ctl_error(struct usb_handle *pdev);
+enum usb_status usb_core_start(struct usb_handle *pdev);
+enum usb_status usb_core_stop(struct usb_handle *pdev);
+enum usb_status register_usb_driver(struct usb_handle *pdev,
+				    struct pcd_handle *pcd_handle,
+				    const struct usb_driver *driver,
+				    void *driver_handle);
+enum usb_status register_platform(struct usb_handle *pdev,
+				  const struct usb_desc *plat_call_back);
+
+#endif /* USB_DEVICE_H */