class driver can custom string description

components/drivers/include/drivers/usb_device.h

@@ -166,7 +166,7 @@ struct udev_msg
 };
 typedef struct udev_msg* udev_msg_t;
 
-udevice_t rt_usbd_device_create(const char** str);
+udevice_t rt_usbd_device_create(void);
 uconfig_t rt_usbd_config_create(void);
 uclass_t rt_usbd_class_create(udevice_t device, udev_desc_t dev_desc,
                               uclass_ops_t ops);
@@ -180,6 +180,7 @@ rt_err_t rt_usbd_post_event(struct udev_msg* msg, rt_size_t size);
 rt_err_t rt_usbd_free_device(udevice_t device);
 rt_err_t rt_usbd_device_set_controller(udevice_t device, udcd_t dcd);
 rt_err_t rt_usbd_device_set_descriptor(udevice_t device, udev_desc_t dev_desc);
+rt_err_t rt_usbd_device_set_string(udevice_t device, const char** ustring);
 rt_err_t rt_usbd_device_add_config(udevice_t device, uconfig_t cfg);
 rt_err_t rt_usbd_config_add_class(uconfig_t cfg, uclass_t cls);
 rt_err_t rt_usbd_class_add_interface(uclass_t cls, uintf_t intf);

components/drivers/usb/usbdevice/class/cdc_vcom.c

@@ -132,6 +132,16 @@ const static struct ucdc_data_descriptor _data_desc =
     0x00,
 };
 
+const static char* _ustring[] =
+{
+    "Language",
+    "RT-Thread Team.",
+    "RTT Virtual Serial",
+    "1.1.0",
+    "Configuration",
+    "Interface",
+};
+
 /**
  * This function will handle cdc bulk in endpoint request.
  *
@@ -438,6 +448,8 @@ uclass_t rt_usbd_class_cdc_create(udevice_t device)
     /* parameter check */
     RT_ASSERT(device != RT_NULL);
 
+    /* set usb device string description */
+    rt_usbd_device_set_string(device, _ustring);
     /* create a cdc class */
     cdc = rt_usbd_class_create(device, &dev_desc, &ops);
     /* create a cdc class endpoints collection */

components/drivers/usb/usbdevice/class/mstorage.c

@@ -79,6 +79,16 @@ const static struct umass_descriptor _mass_desc =
     0x00,                       //bInterval;
 };
 
+const static char* _ustring[] =
+{
+    "Language",
+    "RT-Thread Team.",
+    "RTT Mass Storage",
+    "1.1.0",
+    "Configuration",
+    "Interface",
+};
+
 /**
  * This function will allocate an usb device instance from system.
  *
@@ -562,6 +572,8 @@ uclass_t rt_usbd_class_mstorage_create(udevice_t device)
     /* parameter check */
     RT_ASSERT(device != RT_NULL);
 
+    /* set usb device string description */
+    rt_usbd_device_set_string(device, _ustring);
     /* create a mass storage class */
     mstorage = rt_usbd_class_create(device, &dev_desc, &ops);
     /* create a mass storage endpoints collection */

components/drivers/usb/usbdevice/core/core.c

@@ -612,13 +612,10 @@ rt_err_t _sof_notify(udevice_t device)
  *
  * @return an usb device object on success, RT_NULL on fail.
  */
-udevice_t rt_usbd_device_create(const char** ustring)
+udevice_t rt_usbd_device_create(void)
 {
     udevice_t udevice;
 
-    /* parameter check */
-    RT_ASSERT(ustring != RT_NULL);
-
     RT_DEBUG_LOG(RT_DEBUG_USB, ("rt_usbd_device_create\n"));
 
     /* allocate memory for the object */
@@ -630,9 +627,6 @@ udevice_t rt_usbd_device_create(const char** ustring)
     }
     rt_memset(udevice, 0, sizeof(struct udevice));
 
-    /* set string descriptor array to the device object */
-    udevice->str = ustring;
-
     /* to initialize configuration list */
     rt_list_init(&udevice->cfg_list);
 
@@ -642,6 +636,26 @@ udevice_t rt_usbd_device_create(const char** ustring)
     return udevice;
 }
 
+/**
+ * This function will set usb device string description.
+ *
+ * @param device the usb device object. 
+ * @param ustring pointer to string pointer array.
+ *
+ * @return RT_EOK.
+ */
+rt_err_t rt_usbd_device_set_string(udevice_t device, const char** ustring)
+{
+    /* parameter check */
+    RT_ASSERT(device != RT_NULL);
+    RT_ASSERT(ustring != RT_NULL);
+
+    /* set string descriptor array to the device object */
+    device->str = ustring;
+
+    return RT_EOK;
+}
+
 /**
  * This function will set an usb controller driver to a device.
  *

components/drivers/usb/usbdevice/core/usbdevice.c

@@ -18,15 +18,17 @@
 
 #ifdef RT_USING_USB_DEVICE
 
+#ifdef RT_USB_DEVICE_COMPOSITE
 const static char* ustring[] =
 {
     "Language",
     "RT-Thread Team.",
-    "RT-Thread Device",
+    "RTT Composite Device",
     "1.1.0",
     "Configuration",
     "Interface",
 };
+#endif
 
 #ifdef RT_USB_DEVICE_COMPOSITE
 static struct udevice_descriptor compsit_desc =
@@ -68,7 +70,7 @@ rt_err_t rt_usb_device_init(const char* udc_name)
     rt_usbd_core_init();
 
     /* create a device object */
-    udevice = rt_usbd_device_create(ustring);
+    udevice = rt_usbd_device_create();
 
     /* set usb controller driver to the device */
     rt_usbd_device_set_controller(udevice, (udcd_t)udc);
@@ -101,6 +103,7 @@ rt_err_t rt_usb_device_init(const char* udc_name)
     /* set device descriptor to the device */
 #ifdef RT_USB_DEVICE_COMPOSITE
     rt_usbd_device_set_descriptor(udevice, &compsit_desc);
+    rt_usbd_device_set_string(udevice, ustring);
 #else
     rt_usbd_device_set_descriptor(udevice, cls->dev_desc);
 #endif