Commit 5b7c407b authored by Rodney Lorrimar's avatar Rodney Lorrimar Committed by Dmitry Torokhov
Browse files

Input: adbhid - capslock and power button fix 



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: default avatarRodney Lorrimar <rodney@rodney.id.au>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent 2e75f044

drivers/macintosh/adbhid.c

+12 −3
Original line number Diff line number Diff line
@@ -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;

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