usb: gadget: add SuperSpeed support to the Gadget Framework

SuperSpeed USB has defined a new descriptor, called
the Binary Device Object Store (BOS) Descriptor. It
has also changed a bit the definition of SET_FEATURE
and GET_STATUS requests to add USB3-specific details.

This patch implements both changes to the Composite
Gadget Framework.

[ balbi@ti.com : slight changes to commit log
		 fixed a compile error on ARM ]

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index a3e72dfa6996..a316fba73518 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -59,6 +59,10 @@ struct usb_configuration;
  * @hs_descriptors: Table of high speed descriptors, using interface and
  *      string identifiers assigned during @bind().  If this pointer is null,
  *      the function will not be available at high speed.
+ * @ss_descriptors: Table of super speed descriptors, using interface and
+ *      string identifiers assigned during @bind(). If this
+ *      pointer is null after initiation, the function will not
+ *      be available at super speed.
  * @config: assigned when @usb_add_function() is called; this is the
  *      configuration with which this function is associated.
  * @bind: Before the gadget can register, all of its functions bind() to the
@@ -77,6 +81,10 @@ struct usb_configuration;
  * @setup: Used for interface-specific control requests.
  * @suspend: Notifies functions when the host stops sending USB traffic.
  * @resume: Notifies functions when the host restarts USB traffic.
+ * @get_status: Returns function status as a reply to
+ *      GetStatus() request when the recepient is Interface.
+ * @func_suspend: callback to be called when
+ *      SetFeature(FUNCTION_SUSPEND) is reseived
  *
  * A single USB function uses one or more interfaces, and should in most
  * cases support operation at both full and high speeds.  Each function is
@@ -106,6 +114,7 @@ struct usb_function {
         struct usb_gadget_strings       **strings;
         struct usb_descriptor_header    **descriptors;
         struct usb_descriptor_header    **hs_descriptors;
+        struct usb_descriptor_header    **ss_descriptors;
 
         struct usb_configuration        *config;
 
@@ -132,6 +141,10 @@ struct usb_function {
         void                    (*suspend)(struct usb_function *);
         void                    (*resume)(struct usb_function *);
 
+        /* USB 3.0 additions */
+        int                     (*get_status)(struct usb_function *);
+        int                     (*func_suspend)(struct usb_function *,
+                                                u8 suspend_opt);
         /* private: */
         /* internals */
         struct list_head                list;
@@ -219,6 +232,7 @@ struct usb_configuration {
         struct list_head        list;
         struct list_head        functions;
         u8                      next_interface_id;
+        unsigned                superspeed:1;
         unsigned                highspeed:1;
         unsigned                fullspeed:1;
         struct usb_function     *interface[MAX_CONFIG_INTERFACES];