Commit 35e5437e authored by Sarah Sharp's avatar Sarah Sharp Committed by Greg Kroah-Hartman
Browse files

USB: Add the USB 2.0 extension descriptor. 



This device descriptor was added by the recent USB Link Power Management (LPM)
ECN.  It indicates whether the USB device supports LPM.

This descriptor is grouped under a Binary Device Object Store (BOS) descriptor.
Update the BOS comments to indicate any USB device (not just wireless USB
devices) can implement BOS descriptors.

Signed-off-by: default avatarSarah Sharp <sarah.a.sharp@intel.com>
Acked-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 6e1ab3ed

include/linux/usb/ch9.h

+11 −1
Original line number Diff line number Diff line
@@ -455,7 +455,7 @@ struct usb_encryption_descriptor { 


/*-------------------------------------------------------------------------*/



/* USB_DT_BOS:  group of wireless capabilities */

/* USB_DT_BOS:  group of device-level capabilities */

struct usb_bos_descriptor {

	__u8  bLength;

	__u8  bDescriptorType;
@@ -501,6 +501,16 @@ struct usb_wireless_cap_descriptor { /* Ultra Wide Band */ 
	__u8  bReserved;

} __attribute__((packed));



#define	USB_CAP_TYPE_EXT		2



struct usb_ext_cap_descriptor {		/* Link Power Management */

	__u8  bLength;

	__u8  bDescriptorType;

	__u8  bDevCapabilityType;

	__u8  bmAttributes;

#define USB_LPM_SUPPORT			(1 << 1)	/* supports LPM */

} __attribute__((packed));



/*-------------------------------------------------------------------------*/



/* USB_DT_WIRELESS_ENDPOINT_COMP:  companion descriptor associated with