Lines Matching +full:usb +full:- +full:c

1 /* SPDX-License-Identifier: GPL-2.0 */
3  * This file holds USB constants and structures that are needed for
4  * USB device APIs.  These are used by the USB device model, which is
5  * defined in chapter 9 of the USB 2.0 specification and in the
6  * Wireless USB 1.0 (spread around).  Linux has several APIs in C that
9  * - the host side Linux-USB kernel driver API;
10  * - the "usbfs" user space API; and
11  * - the Linux "gadget" device/peripheral side driver API.
13  * USB 2.0 adds an additional "On The Go" (OTG) mode, which lets systems
14  * act either as a USB host or as a USB device.  That means the host and
17  * There's also "Wireless USB", using low power short range radios for
18  * peripheral interconnection but otherwise building on the USB framework.
22  * [a] they never get padded, either internally (USB spec writers
25  * [b] so that accessing bigger-than-a-bytes fields will never
29  * [c] for consistency, removing all doubt even when it appears to
30  *     someone that the two other points are non-issues for that
37 #include <uapi/linux/usb/ch9.h>
40  * usb_ep_type_string() - Returns human readable-name of the endpoint type.
41  * @ep_type: The endpoint type to return human-readable name for.  If it's not
48  * usb_speed_string() - Returns human readable-name of the speed.
49  * @speed: The speed to return human-readable name for.  If it's not
56  * usb_get_maximum_speed - Get maximum requested speed for a given USB
58  * @dev: Pointer to the given USB controller device
60  * The function gets the maximum speed string from property "maximum-speed",
66  * usb_state_string - Returns human readable name for the state.
67  * @state: The state to return a human-readable name for. If it's not
75  * usb_decode_ctrl - Returns human readable representation of control request.
76  * @str: buffer to return a human-readable representation of control request.
79  * @bRequestType: matches the USB bmRequestType field
80  * @bRequest: matches the USB bRequest field
81  * @wValue: matches the USB wValue field (CPU byte order)
82  * @wIndex: matches the USB wIndex field (CPU byte order)
83  * @wLength: matches the USB wLength field (CPU byte order)
85  * Function returns decoded, formatted and human-readable description of