[PATCH] adbhid: enable KEY_FN key reporting

[Aristeu Sergio Rozanski Filho]

This patch enables the KEY_FN reporting on ADB based machines. This is a
needed step to move special key sequences handling to user space and to
allow the usage of Fn key to other purposes. I've been running this for
some days without problems.

Signed-off-by: Aristeu S. Rozanski F. <aris at cathedrallabs.org>
Acked-by: Michael Hanselmann <linux-kernel at hansmi.ch>

Index: ppc-2.6/drivers/macintosh/adbhid.c
===================================================================
--- ppc-2.6.orig/drivers/macintosh/adbhid.c	2006-08-04 08:53:20.000000000 -0300
+++ ppc-2.6/drivers/macintosh/adbhid.c	2006-08-04 09:45:43.000000000 -0300
@@ -70,7 +70,7 @@
 #define ADB_KEY_POWER_OLD	0x7e
 #define ADB_KEY_POWER		0x7f
 
-u8 adb_to_linux_keycodes[128] = {
+u16 adb_to_linux_keycodes[128] = {
 	/* 0x00 */ KEY_A, 		/*  30 */
 	/* 0x01 */ KEY_S, 		/*  31 */
 	/* 0x02 */ KEY_D,		/*  32 */
@@ -134,7 +134,7 @@
 	/* 0x3c */ KEY_RIGHT,		/* 106 */
 	/* 0x3d */ KEY_DOWN,		/* 108 */
 	/* 0x3e */ KEY_UP,		/* 103 */
-	/* 0x3f */ 0,
+	/* 0x3f */ KEY_FN,		/* 0x1d0 */
 	/* 0x40 */ 0,
 	/* 0x41 */ KEY_KPDOT,		/*  83 */
 	/* 0x42 */ 0,
@@ -208,7 +208,7 @@
 	int original_handler_id;
 	int current_handler_id;
 	int mouse_kind;
-	unsigned char *keycode;
+	u16 *keycode;
 	char name[64];
 	char phys[32];
 	int flags;
@@ -275,7 +275,7 @@
 adbhid_input_keycode(int id, int keycode, int repeat, struct pt_regs *regs)
 {
 	struct adbhid *ahid = adbhid[id];
-	int up_flag;
+	int up_flag, key;
 
 	up_flag = (keycode & 0x80);
 	keycode &= 0x7f;
@@ -322,8 +322,7 @@
 			}
 		} else
 			ahid->flags |= FLAG_FN_KEY_PRESSED;
-		/* Swallow the key press */
-		return;
+		break;
 	case ADB_KEY_DEL:
 		/* Emulate Fn+delete = forward delete */
 		if (ahid->flags & FLAG_FN_KEY_PRESSED) {
@@ -337,10 +336,10 @@
 #endif /* CONFIG_PPC_PMAC */
 	}
 
-	if (adbhid[id]->keycode[keycode]) {
+	key = adbhid[id]->keycode[keycode];
+	if (key) {
 		input_regs(adbhid[id]->input, regs);
-		input_report_key(adbhid[id]->input,
-				 adbhid[id]->keycode[keycode], !up_flag);
+		input_report_key(adbhid[id]->input, key, !up_flag);
 		input_sync(adbhid[id]->input);
 	} else
 		printk(KERN_INFO "Unhandled ADB key (scancode %#02x) %s.\n", keycode,
@@ -764,8 +763,8 @@
 		input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_LED) | BIT(EV_REP);
 		input_dev->ledbit[0] = BIT(LED_SCROLLL) | BIT(LED_CAPSL) | BIT(LED_NUML);
 		input_dev->event = adbhid_kbd_event;
-		input_dev->keycodemax = 127;
-		input_dev->keycodesize = 1;
+		input_dev->keycodemax = KEY_FN;
+		input_dev->keycodesize = sizeof(hid->keycode[0]);
 		break;
 
 	case ADB_MOUSE: