iface->condition = USB_INTERFACE_UNBOUND;
mark_quiesced(iface);
}
-/**
- * usb_match_id - find first usb_device_id matching device or interface
- * @interface: the interface of interest
- * @id: array of usb_device_id structures, terminated by zero entry
- *
- * usb_match_id searches an array of usb_device_id's and returns
- * the first one matching the device or interface, or null.
- * This is used when binding (or rebinding) a driver to an interface.
- * Most USB device drivers will use this indirectly, through the usb core,
- * but some layered driver frameworks use it directly.
- * These device tables are exported with MODULE_DEVICE_TABLE, through
- * modutils, to support the driver loading functionality of USB hotplugging.
- *
- * What Matches:
- *
- * The "match_flags" element in a usb_device_id controls which
- * members are used. If the corresponding bit is set, the
- * value in the device_id must match its corresponding member
- * in the device or interface descriptor, or else the device_id
- * does not match.
- *
- * "driver_info" is normally used only by device drivers,
- * but you can create a wildcard "matches anything" usb_device_id
- * as a driver's "modules.usbmap" entry if you provide an id with
- * only a nonzero "driver_info" field. If you do this, the USB device
- * driver's probe() routine should use additional intelligence to
- * decide whether to bind to the specified interface.
- *
- * What Makes Good usb_device_id Tables:
- *
- * The match algorithm is very simple, so that intelligence in
- * driver selection must come from smart driver id records.
- * Unless you have good reasons to use another selection policy,
- * provide match elements only in related groups, and order match
- * specifiers from specific to general. Use the macros provided
- * for that purpose if you can.
- *
- * The most specific match specifiers use device descriptor
- * data. These are commonly used with product-specific matches;
- * the USB_DEVICE macro lets you provide vendor and product IDs,
- * and you can also match against ranges of product revisions.
- * These are widely used for devices with application or vendor
- * specific bDeviceClass values.
- *
- * Matches based on device class/subclass/protocol specifications
- * are slightly more general; use the USB_DEVICE_INFO macro, or
- * its siblings. These are used with single-function devices
- * where bDeviceClass doesn't specify that each interface has
- * its own class.
- *
- * Matches based on interface class/subclass/protocol are the
- * most general; they let drivers bind to any interface on a
- * multiple-function device. Use the USB_INTERFACE_INFO
- * macro, or its siblings, to match class-per-interface style
- * devices (as recorded in bDeviceClass).
- *
- * Within those groups, remember that not all combinations are
- * meaningful. For example, don't give a product version range
- * without vendor and product IDs; or specify a protocol without
- * its associated class and subclass.
- */
-const struct usb_device_id *
-usb_match_id(struct usb_interface *interface, const struct usb_device_id *id)
-{
- struct usb_host_interface *intf;
- struct usb_device *dev;
-
- /* proc_connectinfo in devio.c may call us with id == NULL. */
- if (id == NULL)
- return NULL;
-
- intf = interface->cur_altsetting;
- dev = interface_to_usbdev(interface);
-
- /* It is important to check that id->driver_info is nonzero,
- since an entry that is all zeroes except for a nonzero
- id->driver_info is the way to create an entry that
- indicates that the driver want to examine every
- device and interface. */
- for (; id->idVendor || id->bDeviceClass || id->bInterfaceClass ||
- id->driver_info; id++) {
-
- if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
- id->idVendor != le16_to_cpu(dev->descriptor.idVendor))
- continue;
-
- if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) &&
- id->idProduct != le16_to_cpu(dev->descriptor.idProduct))
- continue;
-
- /* No need to test id->bcdDevice_lo != 0, since 0 is never
- greater than any unsigned number. */
- if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) &&
- (id->bcdDevice_lo > le16_to_cpu(dev->descriptor.bcdDevice)))
- continue;
-
- if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) &&
- (id->bcdDevice_hi < le16_to_cpu(dev->descriptor.bcdDevice)))
- continue;
-
- if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) &&
- (id->bDeviceClass != dev->descriptor.bDeviceClass))
- continue;
-
- if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) &&
- (id->bDeviceSubClass!= dev->descriptor.bDeviceSubClass))
- continue;
-
- if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) &&
- (id->bDeviceProtocol != dev->descriptor.bDeviceProtocol))
- continue;
-
- if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_CLASS) &&
- (id->bInterfaceClass != intf->desc.bInterfaceClass))
- continue;
-
- if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_SUBCLASS) &&
- (id->bInterfaceSubClass != intf->desc.bInterfaceSubClass))
- continue;
-
- if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_PROTOCOL) &&
- (id->bInterfaceProtocol != intf->desc.bInterfaceProtocol))
- continue;
-
- return id;
- }
-
- return NULL;
-}
-
+
+struct find_interface_arg {
+ int minor;
+ struct usb_interface *interface;
+};
static int __find_interface(struct device * dev, void * data)
{
projects / linux-drm-fsl-dcu.git / commitdiff