[PATCH] macintosh/adbhid.c: adb buttons support for aluminium PowerBook G4

This patch adds support for the special adb buttons of the aluminium
PowerBook G4.

Signed-off-by: Andreas Jaggi <[e-mail]>
Cc: Benjamin Herrenschmidt <[e-mail]>
Cc: Paul Mackerras <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/macintosh/adbhid.c

···
 #endif /* CONFIG_PMAC_BACKLIGHT */
 			input_report_key(&adbhid[id]->input, KEY_BRIGHTNESSUP, down);
 			break;
+
+		case 0xc:	/* videomode switch */
+			input_report_key(&adbhid[id]->input, KEY_SWITCHVIDEOMODE, down);
+			break;
+
+		case 0xd:	/* keyboard illumination toggle */
+			input_report_key(&adbhid[id]->input, KEY_KBDILLUMTOGGLE, down);
+			break;
+
+		case 0xe:	/* keyboard illumination decrease */
+			input_report_key(&adbhid[id]->input, KEY_KBDILLUMDOWN, down);
+			break;
+
+		case 0xf:
+			switch (data[1]) {
+			case 0x8f:
+			case 0x0f:
+				/* keyboard illumination increase */
+				input_report_key(&adbhid[id]->input, KEY_KBDILLUMUP, down);
+				break;
+
+			case 0x7f:
+			case 0xff:
+				/* keypad overlay toogle */
+				break;
+
+			default:
+				printk(KERN_INFO "Unhandled ADB_MISC event %02x, %02x, %02x, %02x\n",
+				       data[0], data[1], data[2], data[3]);
+				break;
+			}
+			break;
+		default:
+			printk(KERN_INFO "Unhandled ADB_MISC event %02x, %02x, %02x, %02x\n",
+			       data[0], data[1], data[2], data[3]);
+			break;
 		}
 	  }
 	  break;
···
 			set_bit(KEY_BRIGHTNESSUP, adbhid[id]->input.keybit);
 			set_bit(KEY_BRIGHTNESSDOWN, adbhid[id]->input.keybit);
 			set_bit(KEY_EJECTCD, adbhid[id]->input.keybit);
+			set_bit(KEY_SWITCHVIDEOMODE, adbhid[id]->input.keybit);
+			set_bit(KEY_KBDILLUMTOGGLE, adbhid[id]->input.keybit);
+			set_bit(KEY_KBDILLUMDOWN, adbhid[id]->input.keybit);
+			set_bit(KEY_KBDILLUMUP, adbhid[id]->input.keybit);
 			break;
 		}
 		if (adbhid[id]->name[0])

include/linux/input.h

···
 #define KEY_BRIGHTNESSUP	225
 #define KEY_MEDIA		226
 
+#define KEY_SWITCHVIDEOMODE	227
+#define KEY_KBDILLUMTOGGLE	228
+#define KEY_KBDILLUMDOWN	229
+#define KEY_KBDILLUMUP		230
+
 #define KEY_UNKNOWN		240
 
 #define BTN_MISC		0x100