1/*
 2 * Provides code common for host and device side USB.
 3 *
 4 * This program is free software; you can redistribute it and/or
 5 * modify it under the terms of the GNU General Public License as
 6 * published by the Free Software Foundation, version 2.
 7 *
 8 * If either host side (ie. CONFIG_USB=y) or device side USB stack
 9 * (ie. CONFIG_USB_GADGET=y) is compiled in the kernel, this module is
10 * compiled-in as well.  Otherwise, if either of the two stacks is
11 * compiled as module, this file is compiled as module as well.
12 */
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/usb/ch9.h>
17
18const char *usb_speed_string(enum usb_device_speed speed)
19{
20	static const char *const names[] = {
21		[USB_SPEED_UNKNOWN] = "UNKNOWN",
22		[USB_SPEED_LOW] = "low-speed",
23		[USB_SPEED_FULL] = "full-speed",
24		[USB_SPEED_HIGH] = "high-speed",
25		[USB_SPEED_WIRELESS] = "wireless",
26		[USB_SPEED_SUPER] = "super-speed",
27	};
28
29	if (speed < 0 || speed >= ARRAY_SIZE(names))
30		speed = USB_SPEED_UNKNOWN;
31	return names[speed];
32}
33EXPORT_SYMBOL_GPL(usb_speed_string);
34
35MODULE_LICENSE("GPL");