From faee822c5a7ab99de25cd34fcde3f8d37b6b9923 Mon Sep 17 00:00:00 2001 From: Mathias Nyman Date: Fri, 12 Feb 2016 16:40:14 +0200 Subject: usb: Add USB 3.1 Precision time measurement capability descriptor support USB 3.1 devices that support precision time measurement have an additional PTM cabaility descriptor as part of the full BOS descriptor Look for this descriptor while parsing the BOS descriptor, and store it in struct usb_hub_bos if it exists. Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- include/uapi/linux/usb/ch9.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'include/uapi/linux/usb') diff --git a/include/uapi/linux/usb/ch9.h b/include/uapi/linux/usb/ch9.h index a65f1f328de1..252ac16635dc 100644 --- a/include/uapi/linux/usb/ch9.h +++ b/include/uapi/linux/usb/ch9.h @@ -912,6 +912,16 @@ struct usb_ssp_cap_descriptor { #define USB_SSP_SUBLINK_SPEED_LSM (0xff << 16) /* Lanespeed mantissa */ } __attribute__((packed)); +/* + * Precision time measurement capability descriptor: advertised by devices and + * hubs that support PTM + */ +#define USB_PTM_CAP_TYPE 0xb +struct usb_ptm_cap_descriptor { + __u8 bLength; + __u8 bDescriptorType; + __u8 bDevCapabilityType; +} __attribute__((packed)); /*-------------------------------------------------------------------------*/ -- cgit v1.2.3