usb: gadget: f_mass_storage: factor out a header file

In order to prepare for the new function interface the f_mass_storage.c
needs to be compiled as a module, and so a header file will be required.

This patch factors out some code to a new f_mass_storage.h.

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

diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index def3426..3cdd835 100644 (file)
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -229,6 +229,7 @@
 static const char fsg_string_interface[] = "Mass Storage";
 
 #include "storage_common.h"
+#include "f_mass_storage.h"
 
 /* Static strings, in UTF-8 (for simplicity we use only ASCII characters) */
 static struct usb_string               fsg_strings[] = {
@@ -246,18 +247,6 @@ static struct usb_gadget_strings   fsg_stringtab = {
 struct fsg_dev;
 struct fsg_common;
 
-/* FSF callback functions */
-struct fsg_operations {
-       /*
-        * Callback function to call when thread exits.  If no
-        * callback is set or it returns value lower then zero MSF
-        * will force eject all LUNs it operates on (including those
-        * marked as non-removable or with prevent_medium_removal flag
-        * set).
-        */
-       int (*thread_exits)(struct fsg_common *common);
-};
-
 /* Data shared by all the FSG instances. */
 struct fsg_common {
        struct usb_gadget       *gadget;
@@ -324,28 +313,6 @@ struct fsg_common {
        struct kref             ref;
 };
 
-struct fsg_config {
-       unsigned nluns;
-       struct fsg_lun_config {
-               const char *filename;
-               char ro;
-               char removable;
-               char cdrom;
-               char nofua;
-       } luns[FSG_MAX_LUNS];
-
-       /* Callback functions. */
-       const struct fsg_operations     *ops;
-       /* Gadget's private data. */
-       void                    *private_data;
-
-       const char *vendor_name;                /*  8 characters or less */
-       const char *product_name;               /* 16 characters or less */
-
-       char                    can_stall;
-       unsigned int            fsg_num_buffers;
-};
-
 struct fsg_dev {
        struct usb_function     function;
        struct usb_gadget       *gadget;        /* Copy of cdev->gadget */
@@ -2644,12 +2611,12 @@ static void fsg_lun_release(struct device *dev)
        /* Nothing needs to be done */
 }
 
-static inline void fsg_common_get(struct fsg_common *common)
+void fsg_common_get(struct fsg_common *common)
 {
        kref_get(&common->ref);
 }
 
-static inline void fsg_common_put(struct fsg_common *common)
+void fsg_common_put(struct fsg_common *common)
 {
        kref_put(&common->ref, fsg_common_release);
 }
@@ -2664,9 +2631,9 @@ static inline int fsg_num_buffers_validate(unsigned int fsg_num_buffers)
        return -EINVAL;
 }
 
-static struct fsg_common *fsg_common_init(struct fsg_common *common,
-                                         struct usb_composite_dev *cdev,
-                                         struct fsg_config *cfg)
+struct fsg_common *fsg_common_init(struct fsg_common *common,
+                                  struct usb_composite_dev *cdev,
+                                  struct fsg_config *cfg)
 {
        struct usb_gadget *gadget = cdev->gadget;
        struct fsg_buffhd *bh;
@@ -3043,62 +3010,8 @@ static int fsg_bind_config(struct usb_composite_dev *cdev,
 
 /************************* Module parameters *************************/
 
-struct fsg_module_parameters {
-       char            *file[FSG_MAX_LUNS];
-       bool            ro[FSG_MAX_LUNS];
-       bool            removable[FSG_MAX_LUNS];
-       bool            cdrom[FSG_MAX_LUNS];
-       bool            nofua[FSG_MAX_LUNS];
-
-       unsigned int    file_count, ro_count, removable_count, cdrom_count;
-       unsigned int    nofua_count;
-       unsigned int    luns;   /* nluns */
-       bool            stall;  /* can_stall */
-};
-
-#define _FSG_MODULE_PARAM_ARRAY(prefix, params, name, type, desc)      \
-       module_param_array_named(prefix ## name, params.name, type,     \
-                                &prefix ## params.name ## _count,      \
-                                S_IRUGO);                              \
-       MODULE_PARM_DESC(prefix ## name, desc)
-
-#define _FSG_MODULE_PARAM(prefix, params, name, type, desc)            \
-       module_param_named(prefix ## name, params.name, type,           \
-                          S_IRUGO);                                    \
-       MODULE_PARM_DESC(prefix ## name, desc)
-
-#define __FSG_MODULE_PARAMETERS(prefix, params)                                \
-       _FSG_MODULE_PARAM_ARRAY(prefix, params, file, charp,            \
-                               "names of backing files or devices");   \
-       _FSG_MODULE_PARAM_ARRAY(prefix, params, ro, bool,               \
-                               "true to force read-only");             \
-       _FSG_MODULE_PARAM_ARRAY(prefix, params, removable, bool,        \
-                               "true to simulate removable media");    \
-       _FSG_MODULE_PARAM_ARRAY(prefix, params, cdrom, bool,            \
-                               "true to simulate CD-ROM instead of disk"); \
-       _FSG_MODULE_PARAM_ARRAY(prefix, params, nofua, bool,            \
-                               "true to ignore SCSI WRITE(10,12) FUA bit"); \
-       _FSG_MODULE_PARAM(prefix, params, luns, uint,                   \
-                         "number of LUNs");                            \
-       _FSG_MODULE_PARAM(prefix, params, stall, bool,                  \
-                         "false to prevent bulk stalls")
-
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-
-#define FSG_MODULE_PARAMETERS(prefix, params)                          \
-       __FSG_MODULE_PARAMETERS(prefix, params);                        \
-       module_param_named(num_buffers, fsg_num_buffers, uint, S_IRUGO);\
-       MODULE_PARM_DESC(num_buffers, "Number of pipeline buffers")
-#else
-
-#define FSG_MODULE_PARAMETERS(prefix, params)                          \
-       __FSG_MODULE_PARAMETERS(prefix, params)
-
-#endif
-
 
-static void
-fsg_config_from_params(struct fsg_config *cfg,
+void fsg_config_from_params(struct fsg_config *cfg,
                       const struct fsg_module_parameters *params,
                       unsigned int fsg_num_buffers)
 {
@@ -3131,19 +3044,3 @@ fsg_config_from_params(struct fsg_config *cfg,
        cfg->fsg_num_buffers = fsg_num_buffers;
 }
 
-static inline struct fsg_common *
-fsg_common_from_params(struct fsg_common *common,
-                      struct usb_composite_dev *cdev,
-                      const struct fsg_module_parameters *params,
-                      unsigned int fsg_num_buffers)
-       __attribute__((unused));
-static inline struct fsg_common *
-fsg_common_from_params(struct fsg_common *common,
-                      struct usb_composite_dev *cdev,
-                      const struct fsg_module_parameters *params,
-                      unsigned int fsg_num_buffers)
-{
-       struct fsg_config cfg;
-       fsg_config_from_params(&cfg, params, fsg_num_buffers);
-       return fsg_common_init(common, cdev, &cfg);
-}

diff --git a/drivers/usb/gadget/f_mass_storage.h b/drivers/usb/gadget/f_mass_storage.h
new file mode 100644 (file)
index 0000000..b64761d
--- /dev/null
+++ b/drivers/usb/gadget/f_mass_storage.h
@@ -0,0 +1,126 @@
+#ifndef USB_F_MASS_STORAGE_H
+#define USB_F_MASS_STORAGE_H
+
+#include "storage_common.h"
+
+struct fsg_module_parameters {
+       char            *file[FSG_MAX_LUNS];
+       bool            ro[FSG_MAX_LUNS];
+       bool            removable[FSG_MAX_LUNS];
+       bool            cdrom[FSG_MAX_LUNS];
+       bool            nofua[FSG_MAX_LUNS];
+
+       unsigned int    file_count, ro_count, removable_count, cdrom_count;
+       unsigned int    nofua_count;
+       unsigned int    luns;   /* nluns */
+       bool            stall;  /* can_stall */
+};
+
+#define _FSG_MODULE_PARAM_ARRAY(prefix, params, name, type, desc)      \
+       module_param_array_named(prefix ## name, params.name, type,     \
+                                &prefix ## params.name ## _count,      \
+                                S_IRUGO);                              \
+       MODULE_PARM_DESC(prefix ## name, desc)
+
+#define _FSG_MODULE_PARAM(prefix, params, name, type, desc)            \
+       module_param_named(prefix ## name, params.name, type,           \
+                          S_IRUGO);                                    \
+       MODULE_PARM_DESC(prefix ## name, desc)
+
+#define __FSG_MODULE_PARAMETERS(prefix, params)                                \
+       _FSG_MODULE_PARAM_ARRAY(prefix, params, file, charp,            \
+                               "names of backing files or devices");   \
+       _FSG_MODULE_PARAM_ARRAY(prefix, params, ro, bool,               \
+                               "true to force read-only");             \
+       _FSG_MODULE_PARAM_ARRAY(prefix, params, removable, bool,        \
+                               "true to simulate removable media");    \
+       _FSG_MODULE_PARAM_ARRAY(prefix, params, cdrom, bool,            \
+                               "true to simulate CD-ROM instead of disk"); \
+       _FSG_MODULE_PARAM_ARRAY(prefix, params, nofua, bool,            \
+                               "true to ignore SCSI WRITE(10,12) FUA bit"); \
+       _FSG_MODULE_PARAM(prefix, params, luns, uint,                   \
+                         "number of LUNs");                            \
+       _FSG_MODULE_PARAM(prefix, params, stall, bool,                  \
+                         "false to prevent bulk stalls")
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+
+#define FSG_MODULE_PARAMETERS(prefix, params)                          \
+       __FSG_MODULE_PARAMETERS(prefix, params);                        \
+       module_param_named(num_buffers, fsg_num_buffers, uint, S_IRUGO);\
+       MODULE_PARM_DESC(num_buffers, "Number of pipeline buffers")
+#else
+
+#define FSG_MODULE_PARAMETERS(prefix, params)                          \
+       __FSG_MODULE_PARAMETERS(prefix, params)
+
+#endif
+
+struct fsg_common;
+
+/* FSF callback functions */
+struct fsg_operations {
+       /*
+        * Callback function to call when thread exits.  If no
+        * callback is set or it returns value lower then zero MSF
+        * will force eject all LUNs it operates on (including those
+        * marked as non-removable or with prevent_medium_removal flag
+        * set).
+        */
+       int (*thread_exits)(struct fsg_common *common);
+};
+
+struct fsg_lun_config {
+       const char *filename;
+       char ro;
+       char removable;
+       char cdrom;
+       char nofua;
+};
+
+struct fsg_config {
+       unsigned nluns;
+       struct fsg_lun_config luns[FSG_MAX_LUNS];
+
+       /* Callback functions. */
+       const struct fsg_operations     *ops;
+       /* Gadget's private data. */
+       void                    *private_data;
+
+       const char *vendor_name;                /*  8 characters or less */
+       const char *product_name;               /* 16 characters or less */
+
+       char                    can_stall;
+       unsigned int            fsg_num_buffers;
+};
+
+void fsg_common_get(struct fsg_common *common);
+
+void fsg_common_put(struct fsg_common *common);
+
+struct fsg_common *fsg_common_init(struct fsg_common *common,
+                                  struct usb_composite_dev *cdev,
+                                  struct fsg_config *cfg);
+
+void fsg_config_from_params(struct fsg_config *cfg,
+                           const struct fsg_module_parameters *params,
+                           unsigned int fsg_num_buffers);
+
+static inline struct fsg_common *
+fsg_common_from_params(struct fsg_common *common,
+                      struct usb_composite_dev *cdev,
+                      const struct fsg_module_parameters *params,
+                      unsigned int fsg_num_buffers)
+       __attribute__((unused));
+static inline struct fsg_common *
+fsg_common_from_params(struct fsg_common *common,
+                      struct usb_composite_dev *cdev,
+                      const struct fsg_module_parameters *params,
+                      unsigned int fsg_num_buffers)
+{
+       struct fsg_config cfg;
+       fsg_config_from_params(&cfg, params, fsg_num_buffers);
+       return fsg_common_init(common, cdev, &cfg);
+}
+
+#endif /* USB_F_MASS_STORAGE_H */