diff --git a/components/drivers/include/drivers/usb_host.h b/components/drivers/include/drivers/usb_host.h
index 0e6c21432..a79254c9b 100644
--- a/components/drivers/include/drivers/usb_host.h
+++ b/components/drivers/include/drivers/usb_host.h
@@ -37,14 +37,17 @@ extern "C" {
 #define USB_HUB_PORT_NUM                0x04
 #define SIZEOF_USB_REQUEST              0x08
 
-#define DEV_STATUS_IDLE               0x00
-#define DEV_STATUS_BUSY               0x01
-#define DEV_STATUS_ERROR              0x02
+#define DEV_STATUS_IDLE                 0x00
+#define DEV_STATUS_BUSY                 0x01
+#define DEV_STATUS_ERROR                0x02
 
 #define UPIPE_STATUS_OK                 0x00
 #define UPIPE_STATUS_STALL              0x01
 #define UPIPE_STATUS_ERROR              0x02
 
+#define USBH_PID_SETUP                  0x00
+#define USBH_PID_DATA                   0x01
+
 struct uhcd;
 struct uintf;
 struct uhub;
@@ -74,10 +77,15 @@ typedef struct uprotocal* uprotocal_t;
 
 struct uinstance
 {
+    struct rt_device parent;
+
     struct udevice_descriptor dev_desc;
     ucfg_desc_t cfg_desc;
     struct uhcd *hcd;
 
+    upipe_t pipe_ep0_out;
+    upipe_t pipe_ep0_in;
+
     rt_uint8_t status;
     rt_uint8_t type;
     rt_uint8_t index;
@@ -86,12 +94,12 @@ struct uinstance
     rt_uint8_t max_packet_size;    
     rt_uint8_t port;
 
-    struct uhub* parent;
-    struct uintf* intf[USB_MAX_INTERFACE];        
+    struct uhub* parent_hub;
+    struct uhintf* intf[USB_MAX_INTERFACE];        
 };
 typedef struct uinstance* uinst_t;
 
-struct uintf
+struct uhintf
 {
     struct uinstance* device;
     uintf_desc_t intf_desc;
@@ -102,9 +110,10 @@ struct uintf
 
 struct upipe
 {
+    rt_uint8_t pipe_index;
     rt_uint32_t status;
     struct uendpoint_descriptor ep;
-    struct uintf* intf;
+    struct uhintf* intf;
     func_callback callback;
     void* user_data;
 };
@@ -127,23 +136,16 @@ typedef struct uhub* uhub_t;
 
 struct uhcd_ops
 {
-    int (*ctl_xfer)(struct uinstance* inst, ureq_t setup, void* buffer, int nbytes, 
-        int timeout);
-    int (*bulk_xfer)(upipe_t pipe, void* buffer, int nbytes, int timeout);
-    int (*int_xfer)(upipe_t pipe, void* buffer, int nbytes, int timeout);
-    int (*iso_xfer)(upipe_t pipe, void* buffer, int nbytes, int timeout);
-    
-    rt_err_t (*alloc_pipe)(struct upipe** pipe, struct uintf* intf, uep_desc_t ep, 
-        func_callback callback);
-    rt_err_t (*free_pipe)(upipe_t pipe);    
-    rt_err_t (*hub_ctrl)(rt_uint16_t port, rt_uint8_t cmd, void *args);    
+    int         (*pipe_xfer)    (upipe_t pipe, rt_uint8_t token, void* buffer, int nbytes, int timeout);
+    rt_err_t    (*alloc_pipe)   (struct upipe* pipe, uep_desc_t ep);
+    rt_err_t    (*free_pipe)    (upipe_t pipe);  
 };
-
+typedef struct uhcd_ops* uhcd_ops_t;
 struct uhcd
 {
     struct rt_device parent;
-    struct uhcd_ops* ops;
-    struct uhub* roothub; 
+    uhcd_ops_t ops;
+    uhub_t roothub; 
 };
 typedef struct uhcd* uhcd_t;
 
@@ -177,16 +179,13 @@ void rt_usbh_hub_init(void);
 struct uinstance* rt_usbh_alloc_instance(void);
 rt_err_t rt_usbh_attatch_instance(struct uinstance* device);
 rt_err_t rt_usbh_detach_instance(struct uinstance* device);
-rt_err_t rt_usbh_get_descriptor(struct uinstance* device, rt_uint8_t type, void* buffer, 
-    int nbytes);
+rt_err_t rt_usbh_get_descriptor(struct uinstance* device, rt_uint8_t type, void* buffer, int nbytes);
 rt_err_t rt_usbh_set_configure(struct uinstance* device, int config);
 rt_err_t rt_usbh_set_address(struct uinstance* device);
 rt_err_t rt_usbh_set_interface(struct uinstance* device, int intf);
 rt_err_t rt_usbh_clear_feature(struct uinstance* device, int endpoint, int feature);
-rt_err_t rt_usbh_get_interface_descriptor(ucfg_desc_t cfg_desc, int num, 
-    uintf_desc_t* intf_desc);
-rt_err_t rt_usbh_get_endpoint_descriptor(uintf_desc_t intf_desc, int num, 
-    uep_desc_t* ep_desc);
+rt_err_t rt_usbh_get_interface_descriptor(ucfg_desc_t cfg_desc, int num, uintf_desc_t* intf_desc);
+rt_err_t rt_usbh_get_endpoint_descriptor(uintf_desc_t intf_desc, int num, uep_desc_t* ep_desc);
 
 /* usb class driver interface */
 rt_err_t rt_usbh_class_driver_init(void);
@@ -197,19 +196,10 @@ rt_err_t rt_usbh_class_driver_disable(ucd_t drv, void* args);
 ucd_t rt_usbh_class_driver_find(int class_code, int subclass_code);
 
 /* usb class driver implement */
-ucd_t rt_usbh_class_driver_hid(void);
 ucd_t rt_usbh_class_driver_hub(void);
 ucd_t rt_usbh_class_driver_storage(void);
-ucd_t rt_usbh_class_driver_adk(void);
 
-/* usb hid protocal implement */
-uprotocal_t rt_usbh_hid_protocal_kbd(void);
-uprotocal_t rt_usbh_hid_protocal_mouse(void);
 
-/* usb adk class driver interface */
-rt_err_t rt_usbh_adk_set_string(const char* manufacturer, const char* model,
-    const char* description, const char* version, const char* uri, 
-    const char* serial);
 
 /* usb hub interface */
 rt_err_t rt_usbh_hub_get_descriptor(struct uinstance* device, rt_uint8_t *buffer, 
@@ -225,57 +215,24 @@ rt_err_t rt_usbh_hub_reset_port(uhub_t uhub, rt_uint16_t port);
 rt_err_t rt_usbh_event_signal(struct uhost_msg* msg);
 
 /* usb host controller driver interface */
-rt_inline rt_err_t rt_usb_hcd_alloc_pipe(uhcd_t hcd, upipe_t* pipe, 
-    struct uintf* intf, uep_desc_t ep, func_callback callback)
+rt_inline rt_err_t rt_usb_hcd_alloc_pipe(uhcd_t hcd, upipe_t pipe, uep_desc_t ep)
 {
-    if(intf == RT_NULL) return -RT_EIO;
-
-    return hcd->ops->alloc_pipe(pipe, intf, ep, callback);
+    return hcd->ops->alloc_pipe(pipe, ep);
 }
 
 rt_inline rt_err_t rt_usb_hcd_free_pipe(uhcd_t hcd, upipe_t pipe)
 {
     RT_ASSERT(pipe != RT_NULL);
-    
     return hcd->ops->free_pipe(pipe);
 }
 
-rt_inline int rt_usb_hcd_bulk_xfer(uhcd_t hcd, upipe_t pipe, void* buffer, 
-    int nbytes, int timeout)
+rt_inline int rt_usb_hcd_pipe_xfer(uhcd_t hcd, upipe_t pipe, void* buffer, int nbytes, int timeout)
 {
-    if(pipe == RT_NULL) return -1;
-    if(pipe->intf == RT_NULL) return -1;
-    if(pipe->intf->device == RT_NULL) return -1;    
-    if(pipe->intf->device->status == DEV_STATUS_IDLE) 
-        return -1;
-
-    return hcd->ops->bulk_xfer(pipe, buffer, nbytes, timeout);
+    return hcd->ops->pipe_xfer(pipe, USBH_PID_DATA, buffer, nbytes, timeout);
 }
-
-rt_inline int rt_usb_hcd_control_xfer(uhcd_t hcd, struct uinstance* device, ureq_t setup, 
-    void* buffer, int nbytes, int timeout)
+rt_inline int rt_usb_hcd_setup_xfer(uhcd_t hcd, upipe_t pipe, ureq_t setup, int timeout)
 {
-    if(device->status == DEV_STATUS_IDLE) return -1;
-
-    return hcd->ops->ctl_xfer(device, setup, buffer, nbytes, timeout);
-}
-
-rt_inline int rt_usb_hcd_int_xfer(uhcd_t hcd, upipe_t pipe, void* buffer, 
-    int nbytes, int timeout)
-{    
-    if(pipe == RT_NULL) return -1;
-    if(pipe->intf == RT_NULL) return -1;
-    if(pipe->intf->device == RT_NULL) return -1;    
-    if(pipe->intf->device->status == DEV_STATUS_IDLE) 
-        return -1;
-
-    return hcd->ops->int_xfer(pipe, buffer, nbytes, timeout);
-}
-
-rt_inline rt_err_t rt_usb_hcd_hub_control(uhcd_t hcd, rt_uint16_t port, 
-    rt_uint8_t cmd, void *args)
-{    
-    return hcd->ops->hub_ctrl(port, cmd, args);
+    return hcd->ops->pipe_xfer(pipe, USBH_PID_SETUP, (void *)setup, 8, timeout);
 }
 
 #ifdef __cplusplus
diff --git a/components/drivers/usb/usbhost/SConscript b/components/drivers/usb/usbhost/SConscript
index e8ba3c4a8..b12adfc5a 100644
--- a/components/drivers/usb/usbhost/SConscript
+++ b/components/drivers/usb/usbhost/SConscript
@@ -29,6 +29,6 @@ if GetDepend('RT_USBH_HID_KEYBOARD'):
 CPPPATH = [cwd, cwd + '/class', cwd + '/core', \
 	cwd + '/include', cwd + '../../../include']
 
-group = DefineGroup('rt_usbh', src, depend = ['RT_USING_USBH'], CPPPATH = CPPPATH)
+group = DefineGroup('rt_usbh', src, depend = ['RT_USING_USB_HOST'], CPPPATH = CPPPATH)
 
 Return('group')
diff --git a/components/drivers/usb/usbhost/core/hub.c b/components/drivers/usb/usbhost/core/hub.c
index 24ce980bb..16a20d885 100644
--- a/components/drivers/usb/usbhost/core/hub.c
+++ b/components/drivers/usb/usbhost/core/hub.c
@@ -40,8 +40,7 @@ static struct uclass_driver hub_driver;
  * 
  * @return the error code, RT_EOK on successfully.
  */
-rt_err_t rt_usbh_hub_get_descriptor(struct uinstance* device, rt_uint8_t *buffer, 
-    rt_size_t nbytes)
+rt_err_t rt_usbh_hub_get_descriptor(struct uinstance* device, rt_uint8_t *buffer, rt_size_t nbytes)
 {
     struct urequest setup;
     int timeout = 100;
@@ -49,16 +48,20 @@ rt_err_t rt_usbh_hub_get_descriptor(struct uinstance* device, rt_uint8_t *buffer
     /* parameter check */
     RT_ASSERT(device != RT_NULL);
     
-    setup.request_type = USB_REQ_TYPE_DIR_IN | USB_REQ_TYPE_CLASS | 
-        USB_REQ_TYPE_DEVICE;
+    setup.request_type = USB_REQ_TYPE_DIR_IN | USB_REQ_TYPE_CLASS | USB_REQ_TYPE_DEVICE;
     setup.bRequest = USB_REQ_GET_DESCRIPTOR;
     setup.wIndex = 0;
     setup.wLength = nbytes;
     setup.wValue = USB_DESC_TYPE_HUB << 8;
 
-    if(rt_usb_hcd_control_xfer(device->hcd, device, &setup, buffer, nbytes, 
-        timeout) == nbytes) return RT_EOK;
-    else return -RT_FALSE;    
+    if(rt_usb_hcd_setup_xfer(device->hcd, device->pipe_ep0_out, &setup, timeout) == 8)
+    {
+        if(rt_usb_hcd_pipe_xfer(device->hcd, device->pipe_ep0_in, buffer, nbytes, timeout) == nbytes)
+        {
+            return RT_EOK;
+        }
+    } 
+    return -RT_FALSE;    
 }
 
 /**
@@ -70,25 +73,27 @@ rt_err_t rt_usbh_hub_get_descriptor(struct uinstance* device, rt_uint8_t *buffer
  * 
  * @return the error code, RT_EOK on successfully.
  */
-rt_err_t rt_usbh_hub_get_status(struct uinstance* device, rt_uint8_t* buffer)
+rt_err_t rt_usbh_hub_get_status(struct uinstance* device, rt_uint32_t* buffer)
 {
     struct urequest setup;
     int timeout = 100;
-    int length = 4;
     
     /* parameter check */
     RT_ASSERT(device != RT_NULL);
 
-    setup.request_type = USB_REQ_TYPE_DIR_IN | USB_REQ_TYPE_CLASS | 
-        USB_REQ_TYPE_DEVICE;
+    setup.request_type = USB_REQ_TYPE_DIR_IN | USB_REQ_TYPE_CLASS | USB_REQ_TYPE_DEVICE;
     setup.bRequest = USB_REQ_GET_STATUS;
     setup.wIndex = 0;
-    setup.wLength = length;
+    setup.wLength = 4;
     setup.wValue = 0;
-
-    if(rt_usb_hcd_control_xfer(device->hcd, device, &setup, buffer, length, 
-        timeout) == length) return RT_EOK;
-    else return -RT_FALSE;    
+    if(rt_usb_hcd_setup_xfer(device->hcd, device->pipe_ep0_out, &setup, timeout) == 8)
+    {
+        if(rt_usb_hcd_pipe_xfer(device->hcd, device->pipe_ep0_in, buffer, 4, timeout) == 4)
+        {
+            return RT_EOK;
+        }
+    }
+    return -RT_FALSE;    
 }
 
 /**
@@ -101,12 +106,10 @@ rt_err_t rt_usbh_hub_get_status(struct uinstance* device, rt_uint8_t* buffer)
  * 
  * @return the error code, RT_EOK on successfully.
  */
-rt_err_t rt_usbh_hub_get_port_status(uhub_t hub, rt_uint16_t port, 
-    rt_uint8_t* buffer)
+rt_err_t rt_usbh_hub_get_port_status(uhub_t hub, rt_uint16_t port, rt_uint32_t* buffer)
 {
     struct urequest setup;
     int timeout = 100;
-    int length = 4;
     
     /* parameter check */
     RT_ASSERT(hub != RT_NULL);
@@ -119,16 +122,20 @@ rt_err_t rt_usbh_hub_get_port_status(uhub_t hub, rt_uint16_t port,
         return RT_EOK;
     }
 
-    setup.request_type = USB_REQ_TYPE_DIR_IN | USB_REQ_TYPE_CLASS | 
-        USB_REQ_TYPE_OTHER;
+    setup.request_type = USB_REQ_TYPE_DIR_IN | USB_REQ_TYPE_CLASS | USB_REQ_TYPE_OTHER;
     setup.bRequest = USB_REQ_GET_STATUS;
     setup.wIndex = port;
     setup.wLength = 4;
     setup.wValue = 0;
 
-    if(rt_usb_hcd_control_xfer(hub->hcd, hub->self, &setup, buffer, 
-        length, timeout) == timeout) return RT_EOK;
-    else return -RT_FALSE;        
+    if(rt_usb_hcd_setup_xfer(hub->hcd, hub->self->pipe_ep0_out, &setup, timeout) == 8)
+    {
+        if(rt_usb_hcd_pipe_xfer(hub->hcd, hub->self->pipe_ep0_in, buffer, 4, timeout) == 4)
+        {
+            return RT_EOK;
+        }
+    }
+    return -RT_FALSE;        
 }
 
 /**
@@ -141,8 +148,7 @@ rt_err_t rt_usbh_hub_get_port_status(uhub_t hub, rt_uint16_t port,
  * 
  * @return the error code, RT_EOK on successfully.
  */
-rt_err_t rt_usbh_hub_clear_port_feature(uhub_t hub, rt_uint16_t port, 
-    rt_uint16_t feature)
+rt_err_t rt_usbh_hub_clear_port_feature(uhub_t hub, rt_uint16_t port, rt_uint16_t feature)
 {
     struct urequest setup;
     int timeout = 100;
@@ -165,9 +171,11 @@ rt_err_t rt_usbh_hub_clear_port_feature(uhub_t hub, rt_uint16_t port,
     setup.wLength = 0;
     setup.wValue = feature;
 
-    if(rt_usb_hcd_control_xfer(hub->hcd, hub->self, &setup, RT_NULL, 0, 
-        timeout) == 0) return RT_EOK;
-    else return -RT_FALSE;    
+    if(rt_usb_hcd_setup_xfer(hub->hcd, hub->self->pipe_ep0_out, &setup, timeout) == 8)
+    {
+        return RT_EOK;
+    }
+    return -RT_FALSE;    
 }
 
 /**
@@ -204,8 +212,10 @@ rt_err_t rt_usbh_hub_set_port_feature(uhub_t hub, rt_uint16_t port,
     setup.wLength = 0;
     setup.wValue = feature;
 
-    if(rt_usb_hcd_control_xfer(hub->hcd, hub->self, &setup, RT_NULL, 0, 
-        timeout) == 0) return RT_EOK;
+    if(rt_usb_hcd_setup_xfer(hub->hcd, hub->self->pipe_ep0_out, &setup, timeout) == 8)
+    {
+        return RT_EOK;
+    }
     else return -RT_FALSE;        
 }
 
@@ -341,7 +351,7 @@ static rt_err_t rt_usbh_hub_port_change(uhub_t hub)
             
             /* set usb device speed */
             device->speed = (pstatus & PORT_LSDA) ? 1 : 0;
-            device->parent = hub;    
+            device->parent_hub = hub;    
             device->hcd = hub->hcd;
             hub->child[i] = device;
 
@@ -366,7 +376,7 @@ static rt_err_t rt_usbh_hub_port_change(uhub_t hub)
 static void rt_usbh_hub_irq(void* context)
 {
     upipe_t pipe; 
-    struct uintf* intf;
+    struct uhintf* intf;
     uhub_t hub;
     int timeout = 100;
     
@@ -389,8 +399,7 @@ static void rt_usbh_hub_irq(void* context)
     /* parameter check */
      RT_ASSERT(pipe->intf->device->hcd != RT_NULL);
     
-    rt_usb_hcd_int_xfer(intf->device->hcd, pipe, hub->buffer, 
-        pipe->ep.wMaxPacketSize, timeout);
+    rt_usb_hcd_pipe_xfer(intf->device->hcd, pipe, hub->buffer, pipe->ep.wMaxPacketSize, timeout);
 }
 
 /**
@@ -408,7 +417,7 @@ static rt_err_t rt_usbh_hub_enable(void *arg)
     uep_desc_t ep_desc;
     uhub_t hub;
     struct uinstance* device;
-    struct uintf* intf = (struct uintf*)arg;
+    struct uhintf* intf = (struct uhintf*)arg;
     int timeout = 300;
 
     /* paremeter check */
diff --git a/components/drivers/usb/usbhost/core/usbhost.c b/components/drivers/usb/usbhost/core/usbhost.c
index dcfdf6a12..17e34474f 100644
--- a/components/drivers/usb/usbhost/core/usbhost.c
+++ b/components/drivers/usb/usbhost/core/usbhost.c
@@ -40,9 +40,6 @@ rt_err_t rt_usb_host_init(void)
 {
     ucd_t drv;
     rt_device_t uhc;    
-#ifdef RT_USBH_HID
-    uprotocal_t protocal;
-#endif
 
     uhc = rt_device_find(USB_HOST_CONTROLLER_NAME);
     if(uhc == RT_NULL)
@@ -63,30 +60,6 @@ rt_err_t rt_usb_host_init(void)
     rt_usbh_class_driver_register(drv);
 #endif
 
-#ifdef RT_USBH_HID
-    /* register hid class driver */
-    drv = rt_usbh_class_driver_hid();
-    rt_usbh_class_driver_register(drv);
-
-#ifdef RT_USBH_HID_KEYBOARD    
-    /* register hid keyboard protocal */
-    protocal = rt_usbh_hid_protocal_kbd();    
-    rt_usbh_hid_protocal_register(protocal);
-#endif
-
-#ifdef RT_USBH_HID_MOUSE    
-    /* register hid mouse protocal */
-    protocal = rt_usbh_hid_protocal_mouse();    
-    rt_usbh_hid_protocal_register(protocal);
-#endif    
-#endif
-
-#ifdef RT_USBH_ADK
-    /* register adk class driver */
-    drv = rt_usbh_class_driver_adk();
-    rt_usbh_class_driver_register(drv);
-#endif
-
     /* register hub class driver */
     drv = rt_usbh_class_driver_hub();
     rt_usbh_class_driver_register(drv);