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/Kconfig b/drivers/usb/input/Kconfig
index 509dd0a..5246b35 100644 (file)
--- a/drivers/usb/input/Kconfig
+++ b/drivers/usb/input/Kconfig
@@ -37,6 +37,16 @@ config USB_HIDINPUT
 
          If unsure, say Y.
 
+config USB_HIDINPUT_POWERBOOK
+       bool "Enable support for iBook/PowerBook special keys"
+       default n
+       depends on USB_HIDINPUT
+       help
+         Say Y here if you want support for the special keys (Fn, Numlock) on
+         Apple iBooks and PowerBooks.
+
+         If unsure, say N.
+
 config HID_FF
        bool "Force feedback support (EXPERIMENTAL)"
        depends on USB_HIDINPUT && EXPERIMENTAL

diff --git a/drivers/usb/input/hid-core.c b/drivers/usb/input/hid-core.c
index 1a2d203..a91e72c 100644 (file)
--- a/drivers/usb/input/hid-core.c
+++ b/drivers/usb/input/hid-core.c
@@ -1585,6 +1585,14 @@ static const struct hid_blacklist {
 
        { USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION, HID_QUIRK_CYMOTION },
 
+       { USB_VENDOR_ID_APPLE, 0x020E, HID_QUIRK_POWERBOOK_HAS_FN },
+       { USB_VENDOR_ID_APPLE, 0x020F, HID_QUIRK_POWERBOOK_HAS_FN },
+       { USB_VENDOR_ID_APPLE, 0x0214, HID_QUIRK_POWERBOOK_HAS_FN },
+       { USB_VENDOR_ID_APPLE, 0x0215, HID_QUIRK_POWERBOOK_HAS_FN },
+       { USB_VENDOR_ID_APPLE, 0x0216, HID_QUIRK_POWERBOOK_HAS_FN },
+       { USB_VENDOR_ID_APPLE, 0x030A, HID_QUIRK_POWERBOOK_HAS_FN },
+       { USB_VENDOR_ID_APPLE, 0x030B, HID_QUIRK_POWERBOOK_HAS_FN },
+
        { 0, 0 }
 };
 

diff --git a/drivers/usb/input/hid-input.c b/drivers/usb/input/hid-input.c
index 36a08c0..cb0d80f 100644 (file)
--- a/drivers/usb/input/hid-input.c
+++ b/drivers/usb/input/hid-input.c
@@ -73,6 +73,160 @@ static const struct {
 #define map_key_clear(c)       do { map_key(c); clear_bit(c, bit); } while (0)
 #define map_ff_effect(c)       do { set_bit(c, input->ffbit); } while (0)
 
+#ifdef CONFIG_USB_HIDINPUT_POWERBOOK
+
+struct hidinput_key_translation {
+       u16 from;
+       u16 to;
+       u8 flags;
+};
+
+#define POWERBOOK_FLAG_FKEY 0x01
+
+static struct hidinput_key_translation powerbook_fn_keys[] = {
+       { KEY_BACKSPACE, KEY_DELETE },
+       { KEY_F1,       KEY_BRIGHTNESSDOWN,     POWERBOOK_FLAG_FKEY },
+       { KEY_F2,       KEY_BRIGHTNESSUP,       POWERBOOK_FLAG_FKEY },
+       { KEY_F3,       KEY_MUTE,               POWERBOOK_FLAG_FKEY },
+       { KEY_F4,       KEY_VOLUMEDOWN,         POWERBOOK_FLAG_FKEY },
+       { KEY_F5,       KEY_VOLUMEUP,           POWERBOOK_FLAG_FKEY },
+       { KEY_F6,       KEY_NUMLOCK,            POWERBOOK_FLAG_FKEY },
+       { KEY_F7,       KEY_SWITCHVIDEOMODE,    POWERBOOK_FLAG_FKEY },
+       { KEY_F8,       KEY_KBDILLUMTOGGLE,     POWERBOOK_FLAG_FKEY },
+       { KEY_F9,       KEY_KBDILLUMDOWN,       POWERBOOK_FLAG_FKEY },
+       { KEY_F10,      KEY_KBDILLUMUP,         POWERBOOK_FLAG_FKEY },
+       { KEY_UP,       KEY_PAGEUP },
+       { KEY_DOWN,     KEY_PAGEDOWN },
+       { KEY_LEFT,     KEY_HOME },
+       { KEY_RIGHT,    KEY_END },
+       { }
+};
+
+static struct hidinput_key_translation powerbook_numlock_keys[] = {
+       { KEY_J,        KEY_KP1 },
+       { KEY_K,        KEY_KP2 },
+       { KEY_L,        KEY_KP3 },
+       { KEY_U,        KEY_KP4 },
+       { KEY_I,        KEY_KP5 },
+       { KEY_O,        KEY_KP6 },
+       { KEY_7,        KEY_KP7 },
+       { KEY_8,        KEY_KP8 },
+       { KEY_9,        KEY_KP9 },
+       { KEY_M,        KEY_KP0 },
+       { KEY_DOT,      KEY_KPDOT },
+       { KEY_SLASH,    KEY_KPPLUS },
+       { KEY_SEMICOLON, KEY_KPMINUS },
+       { KEY_P,        KEY_KPASTERISK },
+       { KEY_MINUS,    KEY_KPEQUAL },
+       { KEY_0,        KEY_KPSLASH },
+       { KEY_F6,       KEY_NUMLOCK },
+       { KEY_KPENTER,  KEY_KPENTER },
+       { KEY_BACKSPACE, KEY_BACKSPACE },
+       { }
+};
+
+static int usbhid_pb_fnmode = 1;
+module_param_named(pb_fnmode, usbhid_pb_fnmode, int, 0644);
+MODULE_PARM_DESC(pb_fnmode,
+       "Mode of fn key on PowerBooks (0 = disabled, 1 = fkeyslast, 2 = fkeysfirst)");
+
+static struct hidinput_key_translation *find_translation(struct hidinput_key_translation *table, u16 from)
+{
+       struct hidinput_key_translation *trans;
+
+       /* Look for the translation */
+       for (trans = table; trans->from; trans++)
+               if (trans->from == from)
+                       return trans;
+
+       return NULL;
+}
+
+static int hidinput_pb_event(struct hid_device *hid, struct input_dev *input,
+                            struct hid_usage *usage, __s32 value)
+{
+       struct hidinput_key_translation *trans;
+
+       if (usage->code == KEY_FN) {
+               if (value) hid->quirks |=  HID_QUIRK_POWERBOOK_FN_ON;
+               else       hid->quirks &= ~HID_QUIRK_POWERBOOK_FN_ON;
+
+               input_event(input, usage->type, usage->code, value);
+
+               return 1;
+       }
+
+       if (usbhid_pb_fnmode) {
+               int do_translate;
+
+               trans = find_translation(powerbook_fn_keys, usage->code);
+               if (trans) {
+                       if (test_bit(usage->code, hid->pb_pressed_fn))
+                               do_translate = 1;
+                       else if (trans->flags & POWERBOOK_FLAG_FKEY)
+                               do_translate =
+                                       (usbhid_pb_fnmode == 2 &&  (hid->quirks & HID_QUIRK_POWERBOOK_FN_ON)) ||
+                                       (usbhid_pb_fnmode == 1 && !(hid->quirks & HID_QUIRK_POWERBOOK_FN_ON));
+                       else
+                               do_translate = (hid->quirks & HID_QUIRK_POWERBOOK_FN_ON);
+
+                       if (do_translate) {
+                               if (value)
+                                       set_bit(usage->code, hid->pb_pressed_fn);
+                               else
+                                       clear_bit(usage->code, hid->pb_pressed_fn);
+
+                               input_event(input, usage->type, trans->to, value);
+
+                               return 1;
+                       }
+               }
+
+               if (test_bit(usage->code, hid->pb_pressed_numlock) ||
+                   test_bit(LED_NUML, input->led)) {
+                       trans = find_translation(powerbook_numlock_keys, usage->code);
+
+                       if (trans) {
+                               if (value)
+                                       set_bit(usage->code, hid->pb_pressed_numlock);
+                               else
+                                       clear_bit(usage->code, hid->pb_pressed_numlock);
+
+                               input_event(input, usage->type, trans->to, value);
+                       }
+
+                       return 1;
+               }
+       }
+
+       return 0;
+}
+
+static void hidinput_pb_setup(struct input_dev *input)
+{
+       struct hidinput_key_translation *trans;
+
+       set_bit(KEY_NUMLOCK, input->keybit);
+
+       /* Enable all needed keys */
+       for (trans = powerbook_fn_keys; trans->from; trans++)
+               set_bit(trans->to, input->keybit);
+
+       for (trans = powerbook_numlock_keys; trans->from; trans++)
+               set_bit(trans->to, input->keybit);
+}
+#else
+static inline int hidinput_pb_event(struct hid_device *hid, struct input_dev *input,
+                                   struct hid_usage *usage, __s32 value)
+{
+       return 0;
+}
+
+static inline void hidinput_pb_setup(struct input_dev *input)
+{
+}
+#endif
+
 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
                                     struct hid_usage *usage)
 {
@@ -336,7 +490,12 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
 
                        set_bit(EV_REP, input->evbit);
                        switch(usage->hid & HID_USAGE) {
-                               case 0x003: map_key_clear(KEY_FN);              break;
+                               case 0x003:
+                                       /* The fn key on Apple PowerBooks */
+                                       map_key_clear(KEY_FN);
+                                       hidinput_pb_setup(input);
+                                       break;
+
                                default:    goto ignore;
                        }
                        break;
@@ -493,6 +652,9 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct
                return;
        }
 
+       if ((hid->quirks & HID_QUIRK_POWERBOOK_HAS_FN) && hidinput_pb_event(hid, input, usage, value))
+               return;
+
        if (usage->hat_min < usage->hat_max || usage->hat_dir) {
                int hat_dir = usage->hat_dir;
                if (!hat_dir)
@@ -535,7 +697,7 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct
                return;
        }
 
-       if((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
+       if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
                return;
 
        input_event(input, usage->type, usage->code, value);

diff --git a/drivers/usb/input/hid.h b/drivers/usb/input/hid.h
index 335316c..8b0d434 100644 (file)
--- a/drivers/usb/input/hid.h
+++ b/drivers/usb/input/hid.h
@@ -235,18 +235,20 @@ struct hid_item {
  * 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 @@ struct hid_device {                                                        /* device report descriptor */
        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