linux内核USB相关数据结构

         本文主要是linux内核USB驱动相关数据结构的整理，方便阅读linux内核驱动相关代码的时候查阅

本文主要是linux内核USB驱动相关数据结构的整理，方便阅读linux内核驱动相关代码的时候查阅

usb_interface_descriptor结构体：

struct usb_interface_descriptor {  

    __u8  bLength;             // 描述符大小  

    __u8  bDescriptorType;  

  

    __u8  bInterfaceNumber;  

    __u8  bAlternateSetting;  

    __u8  bNumEndpoints;       // 端点数  

    __u8  bInterfaceClass;     // 接口类  

    __u8  bInterfaceSubClass;  // 接口子类  

    __u8  bInterfaceProtocol;  // 接口协议  

    __u8  iInterface;  

} __attribute__ ((packed)); 

struct usb_device 结构体，linux内核源码下面的可以找到(include/linux/usb.h)

/** 

* struct usb_device - kernel's representation of a USB device 

* @devnum: device number; address on a USB bus 

* @devpath: device ID string for use in messages (e.g., /port/...) 

* @route: tree topology hex string for use with xHCI 

* @state: device state: configured, not attached, etc. 

* @speed: device speed: high/full/low (or error) 

* @tt: Transaction Translator info; used with low/full speed dev, highspeed hub 

* @ttport: device port on that tt hub 

* @toggle: one bit for each endpoint, with ([0] = IN, [1] = OUT) endpoints 

* @parent: our hub, unless we're the root 

* @bus: bus we're part of 

* @ep0: endpoint 0 data (default control pipe) 

* @dev: generic device interface 

* @descriptor: USB device descriptor 

* @config: all of the device's configs 

* @actconfig: the active configuration 

* @ep_in: array of IN endpoints 

* @ep_out: array of OUT endpoints 

* @rawdescriptors: raw descriptors for each config 

* @bus_mA: Current available from the bus 

* @portnum: parent port number (origin 1) 

* @level: number of USB hub ancestors 

* @can_submit: URBs may be submitted 

* @persist_enabled:  USB_PERSIST enabled for this device 

* @have_langid: whether string_langid is valid 

* @authorized: policy has said we can use it; 

*     (user space) policy determines if we authorize this device to be 

*     used or not. By default, wired USB devices are authorized. 

*     WUSB devices are not, until we authorize them from user space. 

*     FIXME -- complete doc 

* @authenticated: Crypto authentication passed 

* @wusb: device is Wireless USB 

* @string_langid: language ID for strings 

* @product: iProduct string, if present (static) 

* @manufacturer: iManufacturer string, if present (static) 

* @serial: iSerialNumber string, if present (static) 

* @filelist: usbfs files that are open to this device 

* @usb_classdev: USB class device that was created for usbfs device 

*     access from userspace 

* @usbfs_dentry: usbfs dentry entry for the device 

* @maxchild: number of ports if hub 

* @children: child devices - USB devices that are attached to this hub 

* @quirks: quirks of the whole device 

* @urbnum: number of URBs submitted for the whole device 

* @active_duration: total time device is not suspended 

* @connect_time: time device was first connected 

* @do_remote_wakeup:  remote wakeup should be enabled 

* @reset_resume: needs reset instead of resume 

* @wusb_dev: if this is a Wireless USB device, link to the WUSB 

*     specific data for the device. 

* @slot_id: Slot ID assigned by xHCI 

* 

* Notes: 

* Usbcore drivers should not set usbdev->state directly.  Instead use 

* usb_set_device_state(). 

*/  

struct usb_device {  

     int          devnum;             /*usb设备在总线上的编号*/  

     char          devpath[16];     

     u32          route;  

     enum usb_device_state     state;  

     enum usb_device_speed     speed;  

  

     struct usb_tt     *tt;  

     int          ttport;  

  

     unsigned int toggle[2];  

  

     struct usb_device *parent;  

     struct usb_bus *bus;  

     struct usb_host_endpoint ep0; /*端点0，特殊对待*/  

  

     struct device dev;  

  

     struct usb_device_descriptor descriptor;  

     struct usb_host_config *config;/*拥有的所有配置*/  

  

     struct usb_host_config *actconfig;/*当前激活的配置*/  

     struct usb_host_endpoint *ep_in[16];/*全速也最多使用15个端点*/  

     struct usb_host_endpoint *ep_out[16];  

  

     char **rawdescriptors;/*字符指针数组,每一项都指向GET_DESCRIPTOR请求获得配置描述符所得到到结果*/  

  

     unsigned short bus_mA;  

     u8 portnum;  

     u8 level;  

  

     unsigned can_submit:1;  

     unsigned persist_enabled:1;  

     unsigned have_langid:1;  

     unsigned authorized:1;  

     unsigned authenticated:1;  

     unsigned wusb:1;  

     int string_langid;  

  

     /* static strings from the device */  

     char *product;  

     char *manufacturer;  

     char *serial;  

  

     struct list_head filelist;  

#ifdef CONFIG_USB_DEVICE_CLASS  

     struct device *usb_classdev;  

#endif  

#ifdef CONFIG_USB_DEVICEFS  

     struct dentry *usbfs_dentry;  

#endif  

  

     int maxchild;  

     struct usb_device *children[USB_MAXCHILDREN];  

  

     u32 quirks;  

     atomic_t urbnum;  

  

     unsigned long active_duration;  

  

#ifdef CONFIG_PM  

     unsigned long connect_time;  

  

     unsigned do_remote_wakeup:1;  

     unsigned reset_resume:1;  

#endif  

     struct wusb_dev *wusb_dev;  

     int slot_id;  

}; 

在linux内核源码下面还可以找到如下结构体（include/linux/usb.h）

struct usb_device;

struct usb_driver;

struct usb_device_driver;

struct usb_class_driver;

struct urb;

struct usb_sg_request;

int usb_sg_init;

struct usb_host_endpoint;

struct usb_host_interface;

struct usb_interface;

struct usb_interface_cache;

struct usb_host_config;

struct usb_host_bos;

struct usb_devmap;

struct usb_bus;

struct usb2_lpm_parameters;

struct usb3_lpm_parameters;

struct usb_dynids;

struct usb_dynid;

struct usbdrv_wrap;

struct usb_iso_packet_descriptor;

struct usb_anchor;