[PATCH] Generic HID layer - hiddev

- hiddev is USB-only (agreed with Marcel Holtmann that Bluetooth currently
  doesn't need it, and future planned interface (rawhid) will be more flexible
  and usable)
- both HID and USB-hid can be now compiled as modules (wasn't possible before
  hiddev was fully separated from generic HID layer)

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/hid/hid-core.c

@@ -819,8 +819,8 @@ static void hid_process_event(struct hid_device *hid, struct hid_field *field, s
 	hid_dump_input(usage, value);
 	if (hid->claimed & HID_CLAIMED_INPUT)
 		hidinput_hid_event(hid, field, usage, value);
-	if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt)
-		hiddev_hid_event(hid, field, usage, value);
+	if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt && hid->hiddev_hid_event)
+		hid->hiddev_hid_event(hid, field, usage, value);
 }
 
 /*
@@ -940,3 +940,5 @@ int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
 }
 EXPORT_SYMBOL_GPL(hid_set_field);
 
+MODULE_LICENSE(DRIVER_LICENSE);
+

drivers/usb/input/hid-core.c

@@ -1284,6 +1284,9 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
 	hid->hidinput_input_event = usb_hidinput_input_event;
 	hid->hidinput_open = hidinput_open;
 	hid->hidinput_close = hidinput_close;
+#ifdef CONFIG_USB_HIDDEV
+	hid->hiddev_hid_event = hiddev_hid_event;
+#endif
 
 	return hid;
 

include/linux/hid.h

@@ -433,6 +433,10 @@ struct hid_device {							/* device report descriptor */
 	int (*hidinput_open) (struct input_dev *);
 	void (*hidinput_close) (struct input_dev *);
 
+	/* hiddev event handler */
+	void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
+				  struct hid_usage *, __s32);
+
 #ifdef CONFIG_USB_HIDINPUT_POWERBOOK
 	unsigned long pb_pressed_fn[NBITS(KEY_MAX)];
 	unsigned long pb_pressed_numlock[NBITS(KEY_MAX)];
@@ -477,13 +481,9 @@ struct hid_descriptor {
 #define resolv_event(a,b)	do { } while (0)
 #endif
 
-#ifdef CONFIG_HID
 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 /* We ignore a few input applications that are not widely used */
 #define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001))
-#else
-#define IS_INPUT_APPLICATION(a) (0)
-#endif
 
 /* HID core API */
 extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);