USB_STATE_STRING(9) Kernel Mode Gadget API USB_STATE_STRING(9)NAME
usb_state_string - Returns human readable name for the state.
const char * usb_state_string(enum usb_device_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.
David Brownell <firstname.lastname@example.org>
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 USB_STATE_STRING(9)
Check Out this Related Man Page
USB_INTERFACE_ID(9) Kernel Mode Gadget API USB_INTERFACE_ID(9)NAME
usb_interface_id - allocate an unused interface ID
int usb_interface_id(struct usb_configuration * config, struct usb_function * function);
configuration associated with the interface
function handling the interface
single threaded during gadget setup
usb_interface_id is called from usb_function.bind callbacks to allocate new interface IDs. The function driver will then store that ID in
interface, association, CDC union, and other descriptors. It will also handle any control requests targetted at that interface,
particularly changing its altsetting via set_alt. There may also be class-specific or vendor-specific requests to handle.
All interface identifier should be allocated using this routine, to ensure that for example different functions don't wrongly assign
different meanings to the same identifier. Note that since interface identifers are configuration-specific, functions used in more than one
configuration (or more than once in a given configuration) need multiple versions of the relevant descriptors.
Returns the interface ID which was allocated; or -ENODEV if no more interface IDs can be allocated.
David Brownell <email@example.com>
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 USB_INTERFACE_ID(9)
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