13.6. Quick Reference
This section summarizes the symbols introduced in the chapter:- #include <linux/usb.h>
Header file where everything related to USB resides. It must be
included by all USB device drivers.
- struct usb_driver;
Structure that describes a USB driver.
- struct usb_device_id;
Structure that describes the types of USB devices this driver
supports.
- int usb_register(struct usb_driver *d);
- void usb_deregister(struct usb_driver *d);
Functions used to register and unregister a USB driver from the USB
core.
- struct usb_device *interface_to_usbdev(struct usb_interface *intf);
Retrieves the controlling struct
usb_device * out of a
struct usb_interface
*.
- struct usb_device;
Structure that controls an entire USB device.
- struct usb_interface;
Main USB device structure that all USB drivers use to communicate
with the USB core.
- void usb_set_intfdata(struct usb_interface *intf, void *data);
- void *usb_get_intfdata(struct usb_interface *intf);
Functions to set and get access to the private data pointer section
within the struct usb_interface.
- struct usb_class_driver;
A structure that describes a USB driver that wants to use the USB
major number to communicate with user-space programs.
- int usb_register_dev(struct usb_interface *intf, struct usb_class_driver
- *class_driver);
- void usb_deregister_dev(struct usb_interface *intf, struct usb_class_driver
- *class_driver);
Functions used to register and unregister a specific
struct usb_interface
* structure with a struct
usb_class_driver * structure.
- struct urb;
Structure that describes a USB data transmission.
- struct urb *usb_alloc_urb(int iso_packets, int mem_flags);
- void usb_free_urb(struct urb *urb);
Functions used to create and destroy a struct
usb urb *.
- int usb_submit_urb(struct urb *urb, int mem_flags);
- int usb_kill_urb(struct urb *urb);
- int usb_unlink_urb(struct urb *urb);
Functions used to start and stop a USB data transmission.
- void usb_fill_int_urb(struct urb *urb, struct usb_device *dev, unsigned int
- pipe, void *transfer_buffer, int buffer_length, usb_complete_t complete,
- void *context, int interval);
- void usb_fill_bulk_urb(struct urb *urb, struct usb_device *dev, unsigned int
- pipe, void *transfer_buffer, int buffer_length, usb_complete_t complete,
- void *context);
- void usb_fill_control_urb(struct urb *urb, struct usb_device *dev, unsigned
- int pipe, unsigned char *setup_packet, void *transfer_buffer, int
- buffer_ length, usb_complete_t complete, void *context);
Functions used to initialize a struct urb before
it is submitted to the USB core.
- int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe, void *data,
- int len, int *actual_length, int timeout);
- int usb_control_msg(struct usb_device *dev, unsigned int pipe, _ _u8 request,
- _ _u8 requesttype, _ _u16 value, _ _u16 index, void *data, _ _u16 size,
- int timeout);
Functions used to send or receive USB data without having to use a
struct urb.
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