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| author | Craig W. Nadler <craig@nadler.us> | 2007-06-15 23:14:35 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-07-12 16:34:40 -0700 |
| commit | 165fe97ed6107d3cde63592d5ac36400a5eb9f6f (patch) | |
| tree | 824bb475b4f36af465989c5dac62f4097a1bd01c /include/linux/usb.h | |
| parent | 50d2dc7266573dfbdc84fc207494dd21315782ef (diff) | |
| download | lwn-165fe97ed6107d3cde63592d5ac36400a5eb9f6f.tar.gz lwn-165fe97ed6107d3cde63592d5ac36400a5eb9f6f.zip | |
USB: add IAD support to usbfs and sysfs
USB_IAD: Adds support for USB Interface Association Descriptors.
This patch adds support to the USB host stack for parsing, storing, and
displaying Interface Association Descriptors. In /proc/bus/usb/devices
lines starting with A: show the fields in an IAD. In sysfs if an
interface on a USB device is referenced by an IAD the following files
will be added to the sysfs directory for that interface:
iad_bFirstInterface, iad_bInterfaceCount, iad_bFunctionClass, and
iad_bFunctionSubClass, iad_bFunctionProtocol
Signed-off-by: Craig W. Nadler <craig@nadler.us>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/usb.h')
| -rw-r--r-- | include/linux/usb.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h index 533c32374e01..7a60946df3b6 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -146,6 +146,10 @@ struct usb_interface { * active alternate setting */ unsigned num_altsetting; /* number of alternate settings */ + /* If there is an interface association descriptor then it will list + * the associated interfaces */ + struct usb_interface_assoc_descriptor *intf_assoc; + int minor; /* minor number this interface is * bound to */ enum usb_interface_condition condition; /* state of binding */ @@ -175,6 +179,7 @@ void usb_put_intf(struct usb_interface *intf); /* this maximum is arbitrary */ #define USB_MAXINTERFACES 32 +#define USB_MAXIADS USB_MAXINTERFACES/2 /** * struct usb_interface_cache - long-term representation of a device interface @@ -245,6 +250,11 @@ struct usb_host_config { struct usb_config_descriptor desc; char *string; /* iConfiguration string, if present */ + + /* List of any Interface Association Descriptors in this + * configuration. */ + struct usb_interface_assoc_descriptor *intf_assoc[USB_MAXIADS]; + /* the interfaces associated with this configuration, * stored in no particular order */ struct usb_interface *interface[USB_MAXINTERFACES]; |