1 files changed, 73 insertions, 2 deletions

diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index b09c37e04a91..3c671c1b37f6 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -77,6 +77,8 @@ struct usb_configuration;
  *      in interface or class descriptors; endpoints; I/O buffers; and so on.
  * @unbind: Reverses @bind; called as a side effect of unregistering the
  *      driver which added this function.
+ * @free_func: free the struct usb_function.
+ * @mod: (internal) points to the module that created this structure.
  * @set_alt: (REQUIRED) Reconfigures altsettings; function drivers may
  *      initialize usb_ep.driver data at this time (when it is used).
  *      Note that setting an interface to its current altsetting resets
@@ -116,6 +118,7 @@ struct usb_configuration;
  * two or more distinct instances within the same configuration, providing
  * several independent logical data links to a USB host.
  */
+
 struct usb_function {
         const char                      *name;
         struct usb_gadget_strings       **strings;
@@ -136,6 +139,8 @@ struct usb_function {
                                         struct usb_function *);
         void                    (*unbind)(struct usb_configuration *,
                                         struct usb_function *);
+        void                    (*free_func)(struct usb_function *f);
+        struct module           *mod;
 
         /* runtime state management */
         int                     (*set_alt)(struct usb_function *,
@@ -156,6 +161,7 @@ struct usb_function {
         /* internals */
         struct list_head                list;
         DECLARE_BITMAP(endpoints, 32);
+        const struct usb_function_instance *fi;
 };
 
 int usb_add_function(struct usb_configuration *, struct usb_function *);
@@ -184,7 +190,8 @@ int config_ep_by_speed(struct usb_gadget *g, struct usb_function *f,
  * @bConfigurationValue: Copied into configuration descriptor.
  * @iConfiguration: Copied into configuration descriptor.
  * @bmAttributes: Copied into configuration descriptor.
- * @bMaxPower: Copied into configuration descriptor.
+ * @MaxPower: Power consumtion in mA. Used to compute bMaxPower in the
+ *      configuration descriptor after considering the bus speed.
  * @cdev: assigned by @usb_add_config() before calling @bind(); this is
  *      the device associated with this configuration.
  *
@@ -230,7 +237,7 @@ struct usb_configuration {
         u8                      bConfigurationValue;
         u8                      iConfiguration;
         u8                      bmAttributes;
-        u8                      bMaxPower;
+        u16                     MaxPower;
 
         struct usb_composite_dev        *cdev;
 
@@ -316,7 +323,15 @@ struct usb_composite_driver {
 extern int usb_composite_probe(struct usb_composite_driver *driver);
 extern void usb_composite_unregister(struct usb_composite_driver *driver);
 extern void usb_composite_setup_continue(struct usb_composite_dev *cdev);
+extern int composite_dev_prepare(struct usb_composite_driver *composite,
+                struct usb_composite_dev *cdev);
+void composite_dev_cleanup(struct usb_composite_dev *cdev);
 
+static inline struct usb_composite_driver *to_cdriver(
+                struct usb_gadget_driver *gdrv)
+{
+        return container_of(gdrv, struct usb_composite_driver, gadget_driver);
+}
 
 /**
  * struct usb_composite_device - represents one composite usb gadget
@@ -360,6 +375,7 @@ struct usb_composite_dev {
         unsigned int                    suspended:1;
         struct usb_device_descriptor    desc;
         struct list_head                configs;
+        struct list_head                gstrings;
         struct usb_composite_driver     *driver;
         u8                              next_string_id;
         char                            *def_manufacturer;
@@ -381,8 +397,15 @@ struct usb_composite_dev {
 extern int usb_string_id(struct usb_composite_dev *c);
 extern int usb_string_ids_tab(struct usb_composite_dev *c,
                               struct usb_string *str);
+extern struct usb_string *usb_gstrings_attach(struct usb_composite_dev *cdev,
+                struct usb_gadget_strings **sp, unsigned n_strings);
+
 extern int usb_string_ids_n(struct usb_composite_dev *c, unsigned n);
 
+extern void composite_disconnect(struct usb_gadget *gadget);
+extern int composite_setup(struct usb_gadget *gadget,
+                const struct usb_ctrlrequest *ctrl);
+
 /*
  * Some systems will need runtime overrides for the  product identifiers
  * published in the device descriptor, either numbers or strings or both.
@@ -431,6 +454,54 @@ static inline u16 get_default_bcdDevice(void)
         return bcdDevice;
 }
 
+struct usb_function_driver {
+        const char *name;
+        struct module *mod;
+        struct list_head list;
+        struct usb_function_instance *(*alloc_inst)(void);
+        struct usb_function *(*alloc_func)(struct usb_function_instance *inst);
+};
+
+struct usb_function_instance {
+        struct usb_function_driver *fd;
+        void (*free_func_inst)(struct usb_function_instance *inst);
+};
+
+void usb_function_unregister(struct usb_function_driver *f);
+int usb_function_register(struct usb_function_driver *newf);
+void usb_put_function_instance(struct usb_function_instance *fi);
+void usb_put_function(struct usb_function *f);
+struct usb_function_instance *usb_get_function_instance(const char *name);
+struct usb_function *usb_get_function(struct usb_function_instance *fi);
+
+struct usb_configuration *usb_get_config(struct usb_composite_dev *cdev,
+                int val);
+int usb_add_config_only(struct usb_composite_dev *cdev,
+                struct usb_configuration *config);
+void usb_remove_function(struct usb_configuration *c, struct usb_function *f);
+
+#define DECLARE_USB_FUNCTION(_name, _inst_alloc, _func_alloc)           \
+        static struct usb_function_driver _name ## usb_func = {         \
+                .name = __stringify(_name),                             \
+                .mod  = THIS_MODULE,                                    \
+                .alloc_inst = _inst_alloc,                              \
+                .alloc_func = _func_alloc,                              \
+        };                                                              \
+        MODULE_ALIAS("usbfunc:"__stringify(_name));
+
+#define DECLARE_USB_FUNCTION_INIT(_name, _inst_alloc, _func_alloc)      \
+        DECLARE_USB_FUNCTION(_name, _inst_alloc, _func_alloc)           \
+        static int __init _name ## mod_init(void)                       \
+        {                                                               \
+                return usb_function_register(&_name ## usb_func);       \
+        }                                                               \
+        static void __exit _name ## mod_exit(void)                      \
+        {                                                               \
+                usb_function_unregister(&_name ## usb_func);            \
+        }                                                               \
+        module_init(_name ## mod_init);                                 \
+        module_exit(_name ## mod_exit)
+
 /* messaging utils */
 #define DBG(d, fmt, args...) \
         dev_dbg(&(d)->gadget->dev , fmt , ## args)