Commit d1e3d757 authored by Felipe Balbi's avatar Felipe Balbi
Browse files

usb: common: introduce usb_state_string() 



this function will receive enum usb_device_state
and return a human-readable string from it or,
case an unknown value is passed as argument,
the string "UNKNOWN".

Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent b15a762f

drivers/usb/usb-common.c

+21 −0
Original line number Diff line number Diff line
@@ -32,4 +32,25 @@ const char *usb_speed_string(enum usb_device_speed speed) 
}

EXPORT_SYMBOL_GPL(usb_speed_string);



const char *usb_state_string(enum usb_device_state state)

{

	static const char *const names[] = {

		[USB_STATE_NOTATTACHED] = "not attached",

		[USB_STATE_ATTACHED] = "attached",

		[USB_STATE_POWERED] = "powered",

		[USB_STATE_RECONNECTING] = "reconnecting",

		[USB_STATE_UNAUTHENTICATED] = "unauthenticated",

		[USB_STATE_DEFAULT] = "default",

		[USB_STATE_ADDRESS] = "addresssed",

		[USB_STATE_CONFIGURED] = "configured",

		[USB_STATE_SUSPENDED] = "suspended",

	};



	if (state < 0 || state >= ARRAY_SIZE(names))

		return "UNKNOWN";



	return names[state];

}

EXPORT_SYMBOL_GPL(usb_state_string);



MODULE_LICENSE("GPL");

include/linux/usb/ch9.h

+9 −0
Original line number Diff line number Diff line
@@ -43,4 +43,13 @@ 
 */

extern const char *usb_speed_string(enum usb_device_speed speed);





/**

 * usb_state_string - Returns human readable name for the state.

 * @state: The state to return a human-readable name for. If it's not

 *	any of the states devices in usb_device_state_string enum,

 *	the string UNKNOWN will be returned.

 */

extern const char *usb_state_string(enum usb_device_state state);



#endif /* __LINUX_USB_CH9_H */