diff --git a/Makefile b/Makefile
index 6574892..8bad8b8 100755
--- a/Makefile
+++ b/Makefile
@@ -44,25 +44,11 @@ EXTRA_CFLAGS += -I$(src)/include
 CONFIG_AUTOCFG_CP = n
 
 ########################## WIFI IC ############################
-CONFIG_RTL8188E = n
 CONFIG_RTL8812A = y
 CONFIG_RTL8821A = y
-CONFIG_RTL8192E = n
-CONFIG_RTL8723B = n
 CONFIG_RTL8814A = y
-CONFIG_RTL8723C = n
-CONFIG_RTL8188F = n
-CONFIG_RTL8188GTV = n
-CONFIG_RTL8822B = n
-CONFIG_RTL8723D = n
-CONFIG_RTL8821C = n
-CONFIG_RTL8710B = n
-CONFIG_RTL8192F = n
 ######################### Interface ###########################
 CONFIG_USB_HCI = y
-CONFIG_PCI_HCI = n
-CONFIG_SDIO_HCI = n
-CONFIG_GSPI_HCI = n
 ########################## Features ###########################
 CONFIG_MP_INCLUDED = y
 CONFIG_POWER_SAVING = n
@@ -109,6 +95,7 @@ CONFIG_RTW_DEBUG = y
 # default log level is _DRV_INFO_ = 4,
 # please refer to "How_to_set_driver_debug_log_level.doc" to set the available level.
 CONFIG_RTW_LOG_LEVEL = 4
+CONFIG_USB_DEBUG = n
 #DEBUG=1
 ######################## Wake On Lan ##########################
 CONFIG_WOWLAN = n
diff --git a/hal/hal_halmac.c b/hal/hal_halmac.c
index 0b74ecb..8a22991 100644
--- a/hal/hal_halmac.c
+++ b/hal/hal_halmac.c
@@ -5405,6 +5405,10 @@ u8 rtw_halmac_switch_usb_mode(struct dvobj_priv *d, enum RTW_USB_SPEED usb_mode)
 	mac = dvobj_to_halmac(d);
 	api = HALMAC_GET_API(mac);
 	halmac_usb_mode = _usb_mode_drv2halmac(usb_mode);
+#ifdef CONFIG_USB_DEBUG
+	dev_info(&d->pusbdev->dev,
+		  DRV_NAME " call api->halmac_set_hw_value()\n");
+#endif
 	status = api->halmac_set_hw_value(mac, HALMAC_HW_USB_MODE, (void *)&halmac_usb_mode);
 
 	if (HALMAC_RET_SUCCESS != status)
diff --git a/hal/led/hal_led.c b/hal/led/hal_led.c
index 95d3daa..d693ac6 100644
--- a/hal/led/hal_led.c
+++ b/hal/led/hal_led.c
@@ -102,7 +102,7 @@ void rtw_sw_led_blink_uc_trx_only(LED_DATA *led)
 				led->BlinkingLedState = RTW_LED_OFF;
 			else
 				led->BlinkingLedState = RTW_LED_ON;
-			
+
 			if (bStopBlinking) {
 				led->CurrLedState = RTW_LED_OFF;
 				led->bLedBlinkInProgress = _FALSE;
@@ -225,7 +225,7 @@ void rtw_led_set_iface_en_mask(_adapter *adapter, u8 mask)
 void rtw_led_set_ctl_en_mask(_adapter *adapter, u32 ctl_mask)
 {
 	struct led_priv *ledpriv = adapter_to_led(adapter);
-	
+
 #if CONFIG_RTW_SW_LED_TRX_DA_CLASSIFY
 	if (ctl_mask & BIT(LED_CTL_TX))
 		ctl_mask |= BIT(LED_CTL_UC_TX) | BIT(LED_CTL_BMC_TX);
diff --git a/hal/rtl8812a/usb/usb_halinit.c b/hal/rtl8812a/usb/usb_halinit.c
index 37d6cec..cec535d 100644
--- a/hal/rtl8812a/usb/usb_halinit.c
+++ b/hal/rtl8812a/usb/usb_halinit.c
@@ -2458,6 +2458,10 @@ u8 SetHwReg8812AU(PADAPTER Adapter, u8 variable, u8 *val)
 		break;
 
 	case HW_VAR_USB_MODE:
+#ifdef CONFIG_USB_DEBUG
+		dev_info(&pdvobjpriv->pusbdev->dev,
+			 DRV_NAME " switch sethwreg HW_VAR_USB_MODE\n");
+#endif
 		/* U2 to U3 */
 		if (registry_par->switch_usb_mode == 1) {
 			if (IS_HIGH_SPEED_USB(Adapter)) {
diff --git a/hal/rtl8814a/usb/usb_halinit.c b/hal/rtl8814a/usb/usb_halinit.c
index 5ef9659..5d0ffd1 100644
--- a/hal/rtl8814a/usb/usb_halinit.c
+++ b/hal/rtl8814a/usb/usb_halinit.c
@@ -1,7 +1,7 @@
 /******************************************************************************
  *
  * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
- *                                        
+ *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of version 2 of the GNU General Public License as
  * published by the Free Software Foundation.
@@ -2179,6 +2179,10 @@ u8 SetHwReg8814AU(PADAPTER Adapter, u8 variable, u8* val)
 		break;
 
 	case HW_VAR_USB_MODE:
+#ifdef CONFIG_USB_DEBUG
+		dev_info(&pdvobjpriv->pusbdev->dev,
+			 DRV_NAME " switch sethwreg HW_VAR_USB_MODE\n");
+#endif
 		/* U2 to U3 */
 		if (registry_par->switch_usb_mode == 1) {
 			if (IS_HIGH_SPEED_USB(Adapter)) {
diff --git a/os_dep/linux/ioctl_cfg80211.c b/os_dep/linux/ioctl_cfg80211.c
index 0c708ce..f14b33a 100644
--- a/os_dep/linux/ioctl_cfg80211.c
+++ b/os_dep/linux/ioctl_cfg80211.c
@@ -344,7 +344,7 @@ static u8 rtw_chbw_to_cfg80211_chan_def(struct wiphy *wiphy, struct cfg80211_cha
 	if (!chan)
 		goto exit;
 
-	if (bw == CHANNEL_WIDTH_20) 
+	if (bw == CHANNEL_WIDTH_20)
 		chdef->width = ht ? NL80211_CHAN_WIDTH_20 : NL80211_CHAN_WIDTH_20_NOHT;
 	else if (bw == CHANNEL_WIDTH_40)
 		chdef->width = NL80211_CHAN_WIDTH_40;
diff --git a/os_dep/linux/usb_intf.c b/os_dep/linux/usb_intf.c
index 89b9ceb..4594ebd 100644
--- a/os_dep/linux/usb_intf.c
+++ b/os_dep/linux/usb_intf.c
@@ -716,17 +716,34 @@ static void usb_dvobj_deinit(struct usb_interface *usb_intf)
 static int usb_reprobe_switch_usb_mode(PADAPTER Adapter)
 {
 	struct registry_priv *registry_par = &Adapter->registrypriv;
+#ifdef CONFIG_USB_DEBUG
+	struct dvobj_priv *d = adapter_to_dvobj(Adapter);
+#endif
 	HAL_DATA_TYPE *pHalData = GET_HAL_DATA(Adapter);
 	u8 ret = _FALSE;
 
+#ifdef CONFIG_USB_DEBUG
+	dev_info(&d->pusbdev->dev, DRV_NAME " %s \n",  __func__);
+#endif
 	/* efuse not allow driver to switch usb mode */
-	if (pHalData->EEPROMUsbSwitch == _FALSE)
+	if (pHalData->EEPROMUsbSwitch == _FALSE) {
 		goto exit;
+#ifdef CONFIG_USB_DEBUG
+		dev_info(&d->pusbdev->dev, DRV_NAME " no eeprom switch\n");
+#endif
+	}
 
 	/* registry not allow driver to switch usb mode */
-	if (registry_par->switch_usb_mode == 0)
+	if (registry_par->switch_usb_mode == 0) {
 		goto exit;
+#ifdef CONFIG_USB_DEBUG
+		dev_info(&d->pusbdev->dev, DRV_NAME " no module param\n");
+#endif
+	}
 
+#ifdef CONFIG_USB_DEBUG
+	dev_info(&d->pusbdev->dev, DRV_NAME " try hw reg HW_VAR_USB_MODE\n");
+#endif
 	rtw_hal_set_hwreg(Adapter, HW_VAR_USB_MODE, &ret);
 
 exit: