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usb_composite_probe(9) [centos man page]

USB_COMPOSITE_PROBE(9)					      Kernel Mode Gadget API					    USB_COMPOSITE_PROBE(9)

NAME
usb_composite_probe - register a composite driver SYNOPSIS
int usb_composite_probe(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 3.10 June 2014 USB_COMPOSITE_PROBE(9)

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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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