linux/usb/composite.h

1 // SPDX-License-Identifier: GPL-2.0+
3  * composite.h -- framework for usb gadgets which are composite devices
5  * Copyright (C) 2006-2008 David Brownell
14  * functions within any single configuration, and (b) Multi-configuration
20  * might alternatively be packaged in individual configurations, but in
40  * must delay completing the status stage for 0-length control transfers
59  * struct usb_os_desc_ext_prop - describes one "Extended Property"
79  * struct usb_os_desc - describes OS descriptors associated with one interface
99  * struct usb_os_desc_table - describes OS descriptors associated with one
114  * struct usb_function - describes one function of a configuration
153  * @setup: Used for interface-specific control requests.
183  * a driver-specific instance structure to allows multiple activations.  An
262  * struct usb_configuration - represents one gadget configuration
267  *	Examples include OTG and vendor-specific descriptors.
282  * configuration, and handle dual-speed hardware by always providing the same
284  * single-function configuration at a given speed; or have configurations
354  * struct usb_composite_driver - groups configurations into a gadget
411  * module_usb_composite_driver() - Helper macro for registering a USB gadget
443  * struct usb_composite_dev - represents one composite usb gadget
444  * @gadget: read-only, abstracts the gadget's usb peripheral controller
445  * @req: used for control responses; buffer is pre-allocated
446  * @os_desc_req: used for OS descriptors responses; buffer is pre-allocated
529  * String parameters are in UTF-8 (superset of ASCII's 7 bit characters).
628 	dev_dbg(&(d)->gadget->dev , fmt , ## args)
630 	dev_vdbg(&(d)->gadget->dev , fmt , ## args)
632 	dev_err(&(d)->gadget->dev , fmt , ## args)
634 	dev_warn(&(d)->gadget->dev , fmt , ## args)
636 	dev_info(&(d)->gadget->dev , fmt , ## args)