usb: gadget: FunctionFS: create utility file

A header file to be used by f_fs.c and g_ffs.c will be required when
f_fs.c is converted into a module.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/f_fs.c

@@ -27,6 +27,7 @@
 #include <linux/usb/composite.h>
 #include <linux/usb/functionfs.h>
 
+#include "u_fs.h"
 
 #define FUNCTIONFS_MAGIC	0xa647361 /* Chosen by a honest dice roll ;) */
 

drivers/usb/gadget/g_ffs.c

@@ -69,13 +69,6 @@ MODULE_LICENSE("GPL");
 
 #define GFS_MAX_DEVS	10
 
-struct gfs_ffs_obj {
-	const char *name;
-	bool mounted;
-	bool desc_ready;
-	struct ffs_data *ffs_data;
-};
-
 USB_GADGET_COMPOSITE_OPTIONS();
 
 static struct usb_device_descriptor gfs_dev_desc = {
@@ -181,7 +174,7 @@ static DEFINE_MUTEX(gfs_lock);
 static unsigned int missing_funcs;
 static bool gfs_registered;
 static bool gfs_single_func;
-static struct gfs_ffs_obj *ffs_tab;
+static struct ffs_dev *ffs_tab;
 
 static int __init gfs_init(void)
 {
@@ -224,7 +217,7 @@ static void __exit gfs_exit(void)
 }
 module_exit(gfs_exit);
 
-static struct gfs_ffs_obj *gfs_find_dev(const char *dev_name)
+static struct ffs_dev *gfs_find_dev(const char *dev_name)
 {
 	int i;
 
@@ -242,7 +235,7 @@ static struct gfs_ffs_obj *gfs_find_dev(const char *dev_name)
 
 static int functionfs_ready_callback(struct ffs_data *ffs)
 {
-	struct gfs_ffs_obj *ffs_obj;
+	struct ffs_dev *ffs_obj;
 	int ret;
 
 	ENTER();
@@ -283,7 +276,7 @@ done:
 
 static void functionfs_closed_callback(struct ffs_data *ffs)
 {
-	struct gfs_ffs_obj *ffs_obj;
+	struct ffs_dev *ffs_obj;
 
 	ENTER();
 	mutex_lock(&gfs_lock);
@@ -305,7 +298,7 @@ done:
 
 static void *functionfs_acquire_dev_callback(const char *dev_name)
 {
-	struct gfs_ffs_obj *ffs_dev;
+	struct ffs_dev *ffs_dev;
 
 	ENTER();
 	mutex_lock(&gfs_lock);
@@ -329,7 +322,7 @@ done:
 
 static void functionfs_release_dev_callback(struct ffs_data *ffs_data)
 {
-	struct gfs_ffs_obj *ffs_dev;
+	struct ffs_dev *ffs_dev;
 
 	ENTER();
 	mutex_lock(&gfs_lock);

drivers/usb/gadget/u_fs.h

@@ -0,0 +1,28 @@
+/*
+ * u_fs.h
+ *
+ * Utility definitions for the FunctionFS
+ *
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef U_FFS_H
+#define U_FFS_H
+
+#include <linux/usb/composite.h>
+
+struct ffs_dev {
+	const char *name;
+	bool mounted;
+	bool desc_ready;
+	struct ffs_data *ffs_data;
+};
+
+#endif /* U_FFS_H */