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authorBjørn Mork <bjorn@mork.no>2012-05-18 21:27:43 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-06-13 15:40:09 -0700
commit81df2d594340dcb6d1a02191976be88a1ca8120c (patch)
treef5a20ebf416c03b41611518d54706019d0c0ffa2 /include/linux/usb.h
parent7e97243c2080ecae7129e83635227fdebd4feef6 (diff)
USB: allow match on bInterfaceNumber
Some composite USB devices provide multiple interfaces with different functions, all using "vendor-specific" for class/subclass/protocol. Another OS use interface numbers to match the driver and interface. It seems these devices are designed with that in mind - using static interface numbers for the different functions. This adds support for matching against the bInterfaceNumber, allowing such devices to be supported without having to resort to testing against interface number whitelists and/or blacklists in the probe. Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/usb.h')
-rw-r--r--include/linux/usb.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h
index dea39dc551d..f717fbdaee8 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -777,6 +777,22 @@ static inline int usb_make_path(struct usb_device *dev, char *buf, size_t size)
.bInterfaceProtocol = (pr)
/**
+ * USB_DEVICE_INTERFACE_NUMBER - describe a usb device with a specific interface number
+ * @vend: the 16 bit USB Vendor ID
+ * @prod: the 16 bit USB Product ID
+ * @num: bInterfaceNumber value
+ *
+ * This macro is used to create a struct usb_device_id that matches a
+ * specific interface number of devices.
+ */
+#define USB_DEVICE_INTERFACE_NUMBER(vend, prod, num) \
+ .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
+ USB_DEVICE_ID_MATCH_INT_NUMBER, \
+ .idVendor = (vend), \
+ .idProduct = (prod), \
+ .bInterfaceNumber = (num)
+
+/**
* USB_DEVICE_INFO - macro used to describe a class of usb devices
* @cl: bDeviceClass value
* @sc: bDeviceSubClass value