Linux USB驱动注册方式

  #define usb_register(driver) \
              usb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
  int usb_register_driver(struct usb_driver *new_driver, struct module *owner,
                     const char *mod_name)

static int zslusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
       struct usb_device *usbdev;
       struct usb_host_interface *interface;
       struct usb_endpoint_descriptor *endpoint;
       int i = 0;

       usbdev = interface_to_usbdev(intf);
       interface = intf->cur_altsetting;

       printk(KERN_INFO "%s:num:%d \n",__func__,interface->desc.bNumEndpoints);

       for (i = 0;i<interface->desc.bNumEndpoints;i++)
       {
              endpoint = &interface->endpoint[0].desc;
              printk(KERN_INFO "%s: %x %x\n",__func__,endpoint->bEndpointAddress,endpoint->bmAttributes);
              printk(KERN_INFO "%s: %x %x %x\n",__func__,interface->desc.bInterfaceClass,interface->desc.bInterfaceSubClass,interface->desc.bInterfaceProtocol);
       }

       return 0;
}

static void zslusb_disconnect(struct usb_interface *intf)
{
       printk(KERN_INFO "%s: \n",__func__);
       dump_stack();
}

static struct usb_device_id zslusb_id_table [] = {
       { USB_DEVICE(0x413D, 0x2113) },
       { USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT, USB_INTERFACE_PROTOCOL_KEYBOARD)},
       { }    /* Terminating entry */
};

MODULE_DEVICE_TABLE (usb, zsl_usb_id_table);

static struct usb_driver zslusb_driver = {
       .name            = "zslusb",
       .probe           = zslusb_probe,       /* usb设备插入时，id_table信息匹配成功则调用 */
       .disconnect    = zslusb_disconnect,  /* usb设备拔出时调用 */
       .id_table  = zslusb_id_table,    /* id_table,用于匹配设备描述符 */
};

void zslusb_init(void)
{     
       usb_register(&zslusb_driver);    /* 注册usb设备驱动，不申请设备号 */
}

设备插入
├─ 休眠状态? → hcd_resume_work → rpm_resume → usb_runtime_resume → hub_resume
└─ Hub检测 → hub_wq → hub_event → usb_new_device → device_add
    ├─ 首次探测 → usb_generic_driver_probe（基础初始化）
    └─ 接口注册 → device_add → usb_probe_interface（驱动加载）

设备拔出 → hub_irq → tasklet_hi_action → usb_giveback_urb_bh → hub_wq → hub_event
    ├─ usb_disconnect → usb_disable_device（禁用端点+终止URB）
    └─ device_del → device_release_driver → zslusb_disconnect（驱动清理） → usb_put_dev（内存释放）