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-input.c b/drivers/usb/input/hid-input.c
index 36a08c0..cb0d80f 100644
--- a/drivers/usb/input/hid-input.c
+++ b/drivers/usb/input/hid-input.c
@@ -73,6 +73,160 @@
#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 @@
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 @@
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 @@
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);