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authorCraig W. Nadler <craig@nadler.us>2007-06-16 07:14:35 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-13 03:34:40 +0400
commit165fe97ed6107d3cde63592d5ac36400a5eb9f6f (patch)
tree824bb475b4f36af465989c5dac62f4097a1bd01c /include/linux/usb.h
parent50d2dc7266573dfbdc84fc207494dd21315782ef (diff)
downloadlinux-165fe97ed6107d3cde63592d5ac36400a5eb9f6f.tar.xz
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.h10
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];