diff options
| author | Felipe Balbi <balbi@ti.com> | 2013-01-24 22:29:48 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2013-03-18 11:17:11 +0200 |
| commit | d1e3d757f7aa91f15db347fc05ffd7ef7f413091 (patch) | |
| tree | 1cace41a22eb5fc4d5c4e1fbc71442bb5234988e | |
| parent | b15a762f02acb4f1e695a17435f719350f9d5bc1 (diff) | |
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: Felipe Balbi <balbi@ti.com>
| -rw-r--r-- | drivers/usb/usb-common.c | 21 | ||||
| -rw-r--r-- | include/linux/usb/ch9.h | 9 |
2 files changed, 30 insertions, 0 deletions
diff --git a/drivers/usb/usb-common.c b/drivers/usb/usb-common.c index d29503e954ab..070b681e5d17 100644 --- a/drivers/usb/usb-common.c +++ b/drivers/usb/usb-common.c @@ -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"); diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h index 9c210f2283df..27603bcbb9b9 100644 --- a/include/linux/usb/ch9.h +++ b/include/linux/usb/ch9.h @@ -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 */ |