diff -drupN a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h
--- a/drivers/bluetooth/hci_uart.h	2018-08-06 17:23:04.000000000 +0300
+++ b/drivers/bluetooth/hci_uart.h	2022-06-12 05:28:14.000000000 +0300
@@ -17,16 +17,25 @@
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  *
  */
+#include <linux/version.h>
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+/* #define HCI_VERSION_CODE KERNEL_VERSION(3, 14, 41) */
+#define HCI_VERSION_CODE LINUX_VERSION_CODE
 
 #ifndef N_HCI
 #define N_HCI	15
 #endif
 
+#ifndef CONFIG_BT_HCIUART_H4
+#define CONFIG_BT_HCIUART_H4
+#endif
+
+#define BTCOEX
+
 /* Ioctls */
 #define HCIUARTSETPROTO		_IOW('U', 200, int)
 #define HCIUARTGETPROTO		_IOR('U', 201, int)
@@ -83,10 +92,14 @@ struct hci_uart {
 
 	struct work_struct	init_ready;
 	struct work_struct	write_work;
+	struct workqueue_struct *hci_uart_wq;
 
-	const struct hci_uart_proto *proto;
+	const struct hci_uart_proto	*proto;
+	rwlock_t		proto_lock;	/* Stop work for proto close */
 	void			*priv;
 
+	spinlock_t		tx_lock;
+
 	struct sk_buff		*tx_skb;
 	unsigned long		tx_state;
 
@@ -172,6 +185,11 @@ int h5_init(void);
 int h5_deinit(void);
 #endif
 
+#ifdef CONFIG_BT_HCIUART_RTL3WIRE
+int h5_rtk_init(void);
+int h5_rtk_deinit(void);
+#endif
+
 #ifdef CONFIG_BT_HCIUART_INTEL
 int intel_init(void);
 int intel_deinit(void);
@@ -196,3 +214,10 @@ int ag6xx_deinit(void);
 int mrvl_init(void);
 int mrvl_deinit(void);
 #endif
+
+#if HCI_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+static int hci_uart_send_frame(struct sk_buff *skb);
+#else
+static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb);
+#endif
+