struct usb_composite_driver — groups configurations into a gadget
struct usb_composite_driver {
const char * name;
const struct usb_device_descriptor * dev;
struct usb_gadget_strings ** strings;
enum usb_device_speed max_speed;
unsigned needs_serial:1;
int (* bind) (struct usb_composite_dev *cdev);
int (* unbind) (struct usb_composite_dev *);
void (* disconnect) (struct usb_composite_dev *);
void (* suspend) (struct usb_composite_dev *);
void (* resume) (struct usb_composite_dev *);
struct usb_gadget_driver gadget_driver;
}; For diagnostics, identifies the driver.
Template descriptor for the device, including default device identifiers.
tables of strings, keyed by identifiers assigned during bind
and language IDs provided in control requests. Note: The first entries
are predefined. The first entry that may be used is
USB_GADGET_FIRST_AVAIL_IDX
Highest speed the driver supports.
set to 1 if the gadget needs userspace to provide a serial number. If one is not provided, warning will be printed.
(REQUIRED) Used to allocate resources that are shared across the
whole device, such as string IDs, and add its configurations using
usb_add_config(). This may fail by returning a negative errno
value; it should return zero on successful initialization.
Reverses bind; called as a side effect of unregistering
this driver.
optional driver disconnect method
Notifies when the host stops sending USB traffic, after function notifications
Notifies configuration when the host restarts USB traffic, before function notifications
Gadget driver controlling this driver
Devices default to reporting self powered operation. Devices which rely
on bus powered operation should report this in their bind method.
Before returning from bind, various fields in the template descriptor
may be overridden. These include the idVendor/idProduct/bcdDevice values
normally to bind the appropriate host side driver, and the three strings
(iManufacturer, iProduct, iSerialNumber) normally used to provide user
meaningful device identifiers. (The strings will not be defined unless
they are defined in dev and strings.) The correct ep0 maxpacket size
is also reported, as defined by the underlying controller driver.