USB: add USB_VENDOR_AND_INTERFACE_INFO() macro

[pandora-kernel.git] / include / linux / usb.h

diff --git a/include/linux/usb.h b/include/linux/usb.h
index 4269c3f..93629fc 100644 (file)
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -775,6 +775,27 @@ static inline int usb_make_path(struct usb_device *dev, char *buf, size_t size)
        .bInterfaceSubClass = (sc), \
        .bInterfaceProtocol = (pr)
 
+/**
+ * USB_VENDOR_AND_INTERFACE_INFO - describe a specific usb vendor with a class of usb interfaces
+ * @vend: the 16 bit USB Vendor ID
+ * @cl: bInterfaceClass value
+ * @sc: bInterfaceSubClass value
+ * @pr: bInterfaceProtocol value
+ *
+ * This macro is used to create a struct usb_device_id that matches a
+ * specific vendor with a specific class of interfaces.
+ *
+ * This is especially useful when explicitly matching devices that have
+ * vendor specific bDeviceClass values, but standards-compliant interfaces.
+ */
+#define USB_VENDOR_AND_INTERFACE_INFO(vend, cl, sc, pr) \
+       .match_flags = USB_DEVICE_ID_MATCH_INT_INFO \
+               | USB_DEVICE_ID_MATCH_VENDOR, \
+       .idVendor = (vend), \
+       .bInterfaceClass = (cl), \
+       .bInterfaceSubClass = (sc), \
+       .bInterfaceProtocol = (pr)
+
 /* ----------------------------------------------------------------------- */
 
 /* Stuff for dynamic usb ids */