USB: add USB_VENDOR_AND_INTERFACE_INFO() macro

commit d81a5d1956731c453b85c141458d4ff5d6cc5366 upstream.

A lot of Broadcom Bluetooth devices provides vendor specific interface
class and we are getting flooded by patches adding new device support.
This change will help us enable support for any other Broadcom with vendor
specific device that arrives in the future.

Only the product id changes for those devices, so this macro would be
perfect for us:

{ USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01) }

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Acked-by: Henrik Rydberg <rydberg@bitmath.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/linux/usb.h b/include/linux/usb.h
index 72a0e7d039df3c4f602dbc83b31fe27b681f027f..3049707092a63fb52c8ad25521f6a17a669f6a5f 100644 (file)
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -828,6 +828,27 @@ 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 */