usb/uas: add usb_pipe_usage_descriptor

BugLink: http://bugs.launchpad.net/bugs/901215

usb_pipe_usage_descriptor defines the struct which is used to describe
the type of the endpoint in UAS (status/command/data in+out). It will be
used by the UAS gadget, the host code is using a char array for the
access.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
(cherry picked from commit ee398b59ec1dc3ce1d60518f4ea644907893414b)

Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Herton Krzesinski <herton.krzesinski@canonical.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/usb/uas.h b/include/linux/usb/uas.h
index 856be7fcbbd..9a988e41369 100644
--- a/include/linux/usb/uas.h
+++ b/include/linux/usb/uas.h
@@ -47,6 +47,14 @@ struct sense_iu {
         __u8 sense[SCSI_SENSE_BUFFERSIZE];
 };
 
+struct usb_pipe_usage_descriptor {
+        __u8  bLength;
+        __u8  bDescriptorType;
+
+        __u8  bPipeID;
+        __u8  Reserved;
+} __attribute__((__packed__));
+
 enum {
         CMD_PIPE_ID             = 1,
         STATUS_PIPE_ID          = 2,