Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 37 insertions, 21 deletions

diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index 617068134ae8..b78cba466d3d 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -37,6 +37,14 @@
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 
+/*
+ * USB function drivers should return USB_GADGET_DELAYED_STATUS if they
+ * wish to delay the data/status stages of the control transfer till they
+ * are ready. The control transfer will then be kept from completing till
+ * all the function drivers that requested for USB_GADGET_DELAYED_STAUS
+ * invoke usb_composite_setup_continue().
+ */
+#define USB_GADGET_DELAYED_STATUS       0x7fff  /* Impossibly large value */
 
 struct usb_configuration;
 
@@ -161,8 +169,6 @@ ep_choose(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
  *      and by language IDs provided in control requests.
  * @descriptors: Table of descriptors preceding all function descriptors.
  *      Examples include OTG and vendor-specific descriptors.
- * @bind: Called from @usb_add_config() to allocate resources unique to this
- *      configuration and to call @usb_add_function() for each function used.
  * @unbind: Reverses @bind; called as a side effect of unregistering the
  *      driver which added this configuration.
  * @setup: Used to delegate control requests that aren't handled by standard
@@ -190,7 +196,7 @@ ep_choose(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
  * @bind() method is then used to initialize all the functions and then
  * call @usb_add_function() for them.
  *
- * Those functions would normally be independant of each other, but that's
+ * Those functions would normally be independent of each other, but that's
  * not mandatory.  CDC WMC devices are an example where functions often
  * depend on other functions, with some functions subsidiary to others.
  * Such interdependency may be managed in any way, so long as all of the
@@ -207,8 +213,7 @@ struct usb_configuration {
          * we can't restructure things to avoid mismatching...
          */
 
-        /* configuration management:  bind/unbind */
-        int                     (*bind)(struct usb_configuration *);
+        /* configuration management: unbind/setup */
         void                    (*unbind)(struct usb_configuration *);
         int                     (*setup)(struct usb_configuration *,
                                         const struct usb_ctrlrequest *);
@@ -232,20 +237,24 @@ struct usb_configuration {
 };
 
 int usb_add_config(struct usb_composite_dev *,
-                struct usb_configuration *);
+                struct usb_configuration *,
+                int (*)(struct usb_configuration *));
 
 /**
  * struct usb_composite_driver - groups configurations into a gadget
  * @name: For diagnostics, identifies the driver.
+ * @iProduct: Used as iProduct override if @dev->iProduct is not set.
+ *      If NULL value of @name is taken.
+ * @iManufacturer: Used as iManufacturer override if @dev->iManufacturer is
+ *      not set. If NULL a default "<system> <release> with <udc>" value
+ *      will be used.
  * @dev: Template descriptor for the device, including default device
  *      identifiers.
  * @strings: tables of strings, keyed by identifiers assigned during bind()
  *      and language IDs provided in control requests
- * @bind: (REQUIRED) Used to allocate resources that are shared across the
- *      whole device, such as string IDs, and add its configurations using
- *      @usb_add_config().  This may fail by returning a negative errno
- *      value; it should return zero on successful initialization.
- * @unbind: Reverses @bind(); called as a side effect of unregistering
+ * @needs_serial: set to 1 if the gadget needs userspace to provide
+ *      a serial number.  If one is not provided, warning will be printed.
+ * @unbind: Reverses bind; called as a side effect of unregistering
  *      this driver.
  * @disconnect: optional driver disconnect method
  * @suspend: Notifies when the host stops sending USB traffic,
@@ -256,7 +265,7 @@ int usb_add_config(struct usb_composite_dev *,
  * Devices default to reporting self powered operation.  Devices which rely
  * on bus powered operation should report this in their @bind() method.
  *
- * Before returning from @bind, various fields in the template descriptor
+ * Before returning from bind, various fields in the template descriptor
  * may be overridden.  These include the idVendor/idProduct/bcdDevice values
  * normally to bind the appropriate host side driver, and the three strings
  * (iManufacturer, iProduct, iSerialNumber) normally used to provide user
@@ -266,15 +275,12 @@ int usb_add_config(struct usb_composite_dev *,
  */
 struct usb_composite_driver {
         const char                              *name;
+        const char                              *iProduct;
+        const char                              *iManufacturer;
         const struct usb_device_descriptor      *dev;
         struct usb_gadget_strings               **strings;
+        unsigned                needs_serial:1;
 
-        /* REVISIT:  bind() functions can be marked __init, which
-         * makes trouble for section mismatch analysis.  See if
-         * we can't restructure things to avoid mismatching...
-         */
-
-        int                     (*bind)(struct usb_composite_dev *);
         int                     (*unbind)(struct usb_composite_dev *);
 
         void                    (*disconnect)(struct usb_composite_dev *);
@@ -284,8 +290,10 @@ struct usb_composite_driver {
         void                    (*resume)(struct usb_composite_dev *);
 };
 
-extern int usb_composite_register(struct usb_composite_driver *);
-extern void usb_composite_unregister(struct usb_composite_driver *);
+extern int usb_composite_probe(struct usb_composite_driver *driver,
+                               int (*bind)(struct usb_composite_dev *cdev));
+extern void usb_composite_unregister(struct usb_composite_driver *driver);
+extern void usb_composite_setup_continue(struct usb_composite_dev *cdev);
 
 
 /**
@@ -334,13 +342,21 @@ struct usb_composite_dev {
         struct list_head                configs;
         struct usb_composite_driver     *driver;
         u8                              next_string_id;
+        u8                              manufacturer_override;
+        u8                              product_override;
+        u8                              serial_override;
 
         /* the gadget driver won't enable the data pullup
          * while the deactivation count is nonzero.
          */
         unsigned                        deactivations;
 
-        /* protects at least deactivation count */
+        /* the composite driver won't complete the control transfer's
+         * data/status stages till delayed_status is zero.
+         */
+        int                             delayed_status;
+
+        /* protects deactivations and delayed_status counts*/
         spinlock_t                      lock;
 };