1 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h
index 43bce9da7a4d..d1d732c2838d 100644
--- a/include/linux/usb/ch9.h
+++ b/include/linux/usb/ch9.h
@@ -392,6 +392,11 @@ struct usb_endpoint_descriptor {
 #define USB_ENDPOINT_XFER_INT           3
 #define USB_ENDPOINT_MAX_ADJUSTABLE     0x80
 
+/* The USB 3.0 spec redefines bits 5:4 of bmAttributes as interrupt ep type. */
+#define USB_ENDPOINT_INTRTYPE           0x30
+#define USB_ENDPOINT_INTR_PERIODIC      (0 << 4)
+#define USB_ENDPOINT_INTR_NOTIFICATION  (1 << 4)
+
 #define USB_ENDPOINT_SYNCTYPE           0x0c
 #define USB_ENDPOINT_SYNC_NONE          (0 << 2)
 #define USB_ENDPOINT_SYNC_ASYNC         (1 << 2)
@@ -594,6 +599,12 @@ static inline int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd)
         return __le16_to_cpu(epd->wMaxPacketSize);
 }
 
+static inline int usb_endpoint_interrupt_type(
+                const struct usb_endpoint_descriptor *epd)
+{
+        return epd->bmAttributes & USB_ENDPOINT_INTRTYPE;
+}
+
 /*-------------------------------------------------------------------------*/
 
 /* USB_DT_SS_ENDPOINT_COMP: SuperSpeed Endpoint Companion descriptor */