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Input: adbhid - capslock and power button fix

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If the adbhid module parameter restore_capslock_events is used,
pressing the power button may confuse the capslock state. This is
because the power button release scancode (0xff) is sometimes the same
as the capslock press/release scancode.

This fix adds yet another flag to track the state of the power button
so that it works independently of capslock.

Signed-off-by: Rodney Lorrimar <rodney@rodney.id.au>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Rodney Lorrimar 2008-05-05 11:59:24 -04:00 committed by Dmitry Torokhov
parent 2e75f044c7
commit 5b7c407baa
1 changed files with 12 additions and 3 deletions
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15
drivers/macintosh/adbhid.c
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@ -225,6 +225,7 @@ struct adbhid {
#define FLAG_CAPSLOCK_TRANSLATE 0x00000008
#define FLAG_CAPSLOCK_DOWN 0x00000010
#define FLAG_CAPSLOCK_IGNORE_NEXT 0x00000020
#define FLAG_POWER_KEY_PRESSED 0x00000040
static struct adbhid *adbhid[16];
@ -301,9 +302,11 @@ adbhid_input_keycode(int id, int scancode, int repeat)
ahid->flags |= FLAG_CAPSLOCK_TRANSLATE
| FLAG_CAPSLOCK_DOWN;
}
} else if (scancode == 0xff) {
} else if (scancode == 0xff &&
!(ahid->flags & FLAG_POWER_KEY_PRESSED)) {
/* Scancode 0xff usually signifies that the capslock
* key was either pressed or released. */
* key was either pressed or released, or that the
* power button was released. */
if (ahid->flags & FLAG_CAPSLOCK_TRANSLATE) {
keycode = ADB_KEY_CAPSLOCK;
if (ahid->flags & FLAG_CAPSLOCK_DOWN) {
@ -317,7 +320,7 @@ adbhid_input_keycode(int id, int scancode, int repeat)
}
} else {
printk(KERN_INFO "Spurious caps lock event "
"(scancode 0xff).");
"(scancode 0xff).\n");
}
}
}
@ -344,6 +347,12 @@ adbhid_input_keycode(int id, int scancode, int repeat)
}
break;
case ADB_KEY_POWER:
/* Keep track of the power key state */
if (up_flag)
ahid->flags &= ~FLAG_POWER_KEY_PRESSED;
else
ahid->flags |= FLAG_POWER_KEY_PRESSED;
/* Fn + Command will produce a bogus "power" keycode */
if (ahid->flags & FLAG_FN_KEY_PRESSED) {
keycode = ADB_KEY_CMD;