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usbcore: add usb_device_driver definition

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This patch (as732) adds a usb_device_driver structure, for representing
drivers that manage an entire USB device as opposed to just an
interface.  Support routines like usb_register_device_driver,
usb_deregister_device_driver, usb_probe_device, and usb_unbind_device
are also added.

Unlike an earlier version of this patch, the new code is type-safe.  To
accomplish this, the existing struct driver embedded in struct
usb_driver had to be wrapped in an intermediate wrapper.  This enables
the core to tell at runtime whether a particular struct driver belongs
to a device driver or to an interface driver.


Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2006-07-01 22:08:49 -04:00 • committed by Greg Kroah-Hartman
parent 36e56a3458
commit 8bb54ab573
5 changed files with 245 additions and 84 deletions
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20
drivers/usb/core/usb.h
View file

@ -34,8 +34,24 @@ extern int usb_port_suspend(struct usb_device *dev);
extern int usb_port_resume(struct usb_device *dev);
extern struct bus_type usb_bus_type;
extern struct device_driver usb_generic_driver;
extern int usb_generic_driver_data;
extern struct usb_device_driver usb_generic_driver;
/* Here's how we tell apart devices and interfaces. Luckily there's
* no such thing as a platform USB device, so we can steal the use
* of the platform_data field. */
static inline int is_usb_device(struct device *dev)
{
return dev->platform_data == &usb_generic_driver;
}
/* Do the same for device drivers and interface drivers. */
static inline int is_usb_device_driver(struct device_driver *drv)
{
return container_of(drv, struct usbdrv_wrap, driver)->
for_devices;
}
/* Interfaces and their "power state" are owned by usbcore */