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| author | Bjørn Mork <bjorn@mork.no> | 2012-05-18 21:27:43 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-13 15:40:09 -0700 |
| commit | 81df2d594340dcb6d1a02191976be88a1ca8120c (patch) | |
| tree | f5a20ebf416c03b41611518d54706019d0c0ffa2 /include/linux/usb.h | |
| parent | 7e97243c2080ecae7129e83635227fdebd4feef6 (diff) | |
| download | linux-stable-81df2d594340dcb6d1a02191976be88a1ca8120c.tar.gz linux-stable-81df2d594340dcb6d1a02191976be88a1ca8120c.tar.bz2 linux-stable-81df2d594340dcb6d1a02191976be88a1ca8120c.zip | |
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.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h index dea39dc551d4..f717fbdaee8e 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 |