USB_FUNCTION_ACTIVAT(9) Kernel Mode Gadget API USB_FUNCTION_ACTIVAT(9)NAME
usb_function_activate - allow function and gadget enumeration
SYNOPSIS
int usb_function_activate(struct usb_function * function);
ARGUMENTS
function
function on which usb_function_activate was called
DESCRIPTION
Reverses effect of usb_function_deactivate. If no more functions are delaying their activation, the gadget driver will respond to host
enumeration procedures.
Returns zero on success, else negative errno.
AUTHOR
David Brownell <dbrownell@users.sourceforge.net>
Author.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 USB_FUNCTION_ACTIVAT(9)
Check Out this Related Man Page
STRUCT USB_COMPOSITE(9) Kernel Mode Gadget API STRUCT USB_COMPOSITE(9)NAME
struct_usb_composite_driver - groups configurations into a gadget
SYNOPSIS
struct usb_composite_driver {
const char * name;
const struct usb_device_descriptor * dev;
struct usb_gadget_strings ** strings;
int (* bind) (struct usb_composite_dev *);
int (* unbind) (struct usb_composite_dev *);
void (* suspend) (struct usb_composite_dev *);
void (* resume) (struct usb_composite_dev *);
};
MEMBERS
name
For diagnostics, identifies the driver.
dev
Template descriptor for the device, including default device identifiers.
strings
tables of strings, keyed by identifiers assigned during bind and language IDs provided in control requests
bind
(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.
unbind
Reverses bind(); called as a side effect of unregistering this driver.
suspend
Notifies when the host stops sending USB traffic, after function notifications
resume
Notifies configuration when the host restarts USB traffic, before function notifications
DESCRIPTION
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.
AUTHOR
David Brownell <dbrownell@users.sourceforge.net>
Author.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 STRUCT USB_COMPOSITE(9)
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