Input: HID - add support for fn key on Apple PowerBooks

This patch implements support for the fn key on Apple PowerBooks using
USB based keyboards and makes them behave like their ADB counterparts.

Signed-off-by: Michael Hanselmann <linux-kernel@hansmi.ch>
Acked-by: Rene Nussbaumer <linux-kernel@killerfox.forkbomb.ch>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Vojtech Pavlik <vojtech@suse.cz>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/usb/input/hid.h b/drivers/usb/input/hid.h
index 335316c..8b0d434 100644
--- a/drivers/usb/input/hid.h
+++ b/drivers/usb/input/hid.h
@@ -235,18 +235,20 @@
  * HID device quirks.
  */
 
-#define HID_QUIRK_INVERT			0x001
-#define HID_QUIRK_NOTOUCH			0x002
-#define HID_QUIRK_IGNORE			0x004
-#define HID_QUIRK_NOGET				0x008
-#define HID_QUIRK_HIDDEV			0x010
-#define HID_QUIRK_BADPAD			0x020
-#define HID_QUIRK_MULTI_INPUT			0x040
-#define HID_QUIRK_2WHEEL_MOUSE_HACK_7		0x080
-#define HID_QUIRK_2WHEEL_MOUSE_HACK_5		0x100
-#define HID_QUIRK_2WHEEL_MOUSE_HACK_ON		0x200
-#define HID_QUIRK_2WHEEL_POWERMOUSE		0x400
-#define HID_QUIRK_CYMOTION			0x800
+#define HID_QUIRK_INVERT			0x00000001
+#define HID_QUIRK_NOTOUCH			0x00000002
+#define HID_QUIRK_IGNORE			0x00000004
+#define HID_QUIRK_NOGET				0x00000008
+#define HID_QUIRK_HIDDEV			0x00000010
+#define HID_QUIRK_BADPAD			0x00000020
+#define HID_QUIRK_MULTI_INPUT			0x00000040
+#define HID_QUIRK_2WHEEL_MOUSE_HACK_7		0x00000080
+#define HID_QUIRK_2WHEEL_MOUSE_HACK_5		0x00000100
+#define HID_QUIRK_2WHEEL_MOUSE_HACK_ON		0x00000200
+#define HID_QUIRK_2WHEEL_POWERMOUSE		0x00000400
+#define HID_QUIRK_CYMOTION			0x00000800
+#define HID_QUIRK_POWERBOOK_HAS_FN		0x00001000
+#define HID_QUIRK_POWERBOOK_FN_ON		0x00002000
 
 /*
  * This is the global environment of the parser. This information is
@@ -432,6 +434,11 @@
 	void (*ff_exit)(struct hid_device*);                            /* Called by hid_exit_ff(hid) */
 	int (*ff_event)(struct hid_device *hid, struct input_dev *input,
 			unsigned int type, unsigned int code, int value);
+
+#ifdef CONFIG_USB_HIDINPUT_POWERBOOK
+	unsigned long pb_pressed_fn[NBITS(KEY_MAX)];
+	unsigned long pb_pressed_numlock[NBITS(KEY_MAX)];
+#endif
 };
 
 #define HID_GLOBAL_STACK_SIZE 4