标题: ARM做为USB从设备的实现（4） [打印本页]

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作者: yuyang911220    时间: 2014-9-26 21:03     标题: ARM做为USB从设备的实现（4）

• /****************************** Configurations ******************************/
  
• 
  
• static
  int __init do_config(struct usb_configuration *c)  
• {  
•     struct hidg_func_node *e;  
•     int func = 0, status = 0;  
• 
  
•     if (gadget_is_otg(c->cdev->gadget)) {  
•         c->descriptors = otg_desc;  
•         c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;  
•     }  
• 
  
•     list_for_each_entry(e, &hidg_func_list, node) {  
•         status = hidg_bind_config(c, e->func, func++);  
•         if (status)  
•             break;  
•     }  
• 
  
•     return status;  
• }  
• 
  
• static
  struct usb_configuration config_driver = {  
•     .label          = "HID Gadget",  
•     .bind           = do_config,  
•     .bConfigurationValue    = 1,  
•     /* .iConfiguration = DYNAMIC */
  
•     .bmAttributes       = USB_CONFIG_ATT_SELFPOWER,  
• };  
• 
  
• /****************************** Gadget Bind ******************************/
  
• 
  
• static
  int __init hid_bind(struct usb_composite_dev *cdev)  
• {  
•     struct usb_gadget *gadget = cdev->gadget;  
•     struct list_head *tmp;  
•     int status, gcnum, funcs = 0;  
• 
  
•     list_for_each(tmp, &hidg_func_list)  
•         funcs++;  
• 
  
•     if (!funcs)  
•         return -ENODEV;  
• 
  
•     /* set up HID */
  
•     printk("=============bind\n");  
•     status = ghid_setup(cdev->gadget, funcs);  
•     if (status < 0)  
•         return status;  
• 
  
•     gcnum = usb_gadget_controller_number(gadget);  
•     if (gcnum >= 0)  
•         device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum);  
•     else
  
•         device_desc.bcdDevice = cpu_to_le16(0x0300 | 0x0099);  
• 
  
• 
  
•     /* Allocate string descriptor numbers ... note that string
•      * contents can be overridden by the composite_dev glue.
•      */
  
• 
  
•     /* device descriptor strings: manufacturer, product */
  
•     snprintf(manufacturer, sizeof manufacturer, "%s %s with %s",  
•         init_utsname()->sysname, init_utsname()->release,  
•         gadget->name);  
•     status = usb_string_id(cdev);  
•     if (status < 0)  
•         return status;  
•     strings_dev[STRING_MANUFACTURER_IDX].id = status;  
•     device_desc.iManufacturer = status;  
• 
  
•     status = usb_string_id(cdev);  
•     if (status < 0)  
•         return status;  
•     strings_dev[STRING_PRODUCT_IDX].id = status;  
•     device_desc.iProduct = status;  
• 
  
•     /* register our configuration */
  
•     status = usb_add_config(cdev, &config_driver);  
•     if (status < 0)  
•         return status;  
• 
  
•     dev_info(&gadget->dev, DRIVER_DESC ", version: " DRIVER_VERSION "\n");  
• 
  
•     return 0;  
• }  
  

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