USB_COMPOSITE_REGIST(9) Kernel Mode Gadget API USB_COMPOSITE_REGIST(9)NAME
usb_composite_register - register a composite driver
SYNOPSIS
int usb_composite_register(struct usb_composite_driver * driver);
ARGUMENTS
driver
the driver to register
CONTEXT
single threaded during gadget setup
DESCRIPTION
This function is used to register drivers using the composite driver framework. The return value is zero, or a negative errno value. Those
values normally come from the driver's bind method, which does all the work of setting up the driver to match the hardware.
On successful return, the gadget is ready to respond to requests from the host, unless one of its components invokes usb_gadget_disconnect
while it was binding. That would usually be done in order to wait for some userspace participation.
AUTHOR
David Brownell <dbrownell@users.sourceforge.net>
Author.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 USB_COMPOSITE_REGIST(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;
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;
};
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. Note: The first entries are
predefined. The first entry that may be used is USB_GADGET_FIRST_AVAIL_IDX
max_speed
Highest speed the driver supports.
needs_serial
set to 1 if the gadget needs userspace to provide a serial number. If one is not provided, warning will be printed.
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.
disconnect
optional driver disconnect method
suspend
Notifies when the host stops sending USB traffic, after function notifications
resume
Notifies configuration when the host restarts USB traffic, before function notifications
gadget_driver
Gadget driver controlling this driver
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 3.10 June 2014 STRUCT USB_COMPOSITE(9)
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