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From a7a73f0dbd485318b0f71405cf350106a6f826c7 Mon Sep 17 00:00:00 2001
From: Christoph Gysin <christoph.gysin@gmail.com>
Date: Wed, 19 Apr 2017 17:29:57 +0300
Subject: [PATCH] add option iso_layout

fixes #12
---
 applespi.c | 61 ++++++++++++++++++++++++++++++++++++++++---------------------
 1 file changed, 40 insertions(+), 21 deletions(-)

diff --git a/applespi.c b/applespi.c
index b8fa4cf..e0fb2f7 100644
--- a/applespi.c
+++ b/applespi.c
@@ -45,6 +45,10 @@
 #define MAX_FINGERS		6
 #define MAX_FINGER_ORIENTATION	16384
 
+static unsigned int iso_layout = 1;
+module_param(iso_layout, uint, 0644);
+MODULE_PARM_DESC(iso_layout, "Enable/Disable hardcoded ISO-layout of the keyboard. "
+		"(0 = disabled, [1] = enabled)");
 
 struct keyboard_protocol {
 	u16		packet_type;
@@ -177,6 +181,7 @@ static const unsigned char applespi_scancodes[] = {
 	KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7, KEY_F8, KEY_F9,
 	KEY_F10, KEY_F11, KEY_F12, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 	KEY_RIGHT, KEY_LEFT, KEY_DOWN, KEY_UP,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_102ND,
 };
 
 static const unsigned char applespi_controlcodes[] = {
@@ -191,29 +196,34 @@ static const unsigned char applespi_controlcodes[] = {
 };
 
 struct applespi_key_translation {
-	u8  from;
+	u16 from;
 	u16 to;
 };
 
 static const struct applespi_key_translation applespi_fn_codes[] = {
-	{ 42,  KEY_DELETE },
-	{ 40,  KEY_INSERT },
-	{ 58,  KEY_BRIGHTNESSDOWN },
-	{ 59,  KEY_BRIGHTNESSUP },
-	{ 60,  KEY_SCALE },
-	{ 61,  KEY_DASHBOARD },
-	{ 62,  KEY_KBDILLUMDOWN },
-	{ 63,  KEY_KBDILLUMUP },
-	{ 64,  KEY_PREVIOUSSONG },
-	{ 65,  KEY_PLAYPAUSE },
-	{ 66,  KEY_NEXTSONG },
-	{ 67,  KEY_MUTE },
-	{ 68,  KEY_VOLUMEDOWN },
-	{ 69,  KEY_VOLUMEUP },
-	{ 82,  KEY_PAGEUP },
-	{ 81,  KEY_PAGEDOWN },
-	{ 80,  KEY_HOME },
-	{ 79,  KEY_END },
+	{ KEY_BACKSPACE, KEY_DELETE },
+	{ KEY_ENTER,	KEY_INSERT },
+	{ KEY_F1,	KEY_BRIGHTNESSDOWN },
+	{ KEY_F2,	KEY_BRIGHTNESSUP },
+	{ KEY_F3,	KEY_SCALE },
+	{ KEY_F4,	KEY_DASHBOARD },
+	{ KEY_F5,	KEY_KBDILLUMDOWN },
+	{ KEY_F6,	KEY_KBDILLUMUP },
+	{ KEY_F7,	KEY_PREVIOUSSONG },
+	{ KEY_F8,	KEY_PLAYPAUSE },
+	{ KEY_F9,	KEY_NEXTSONG },
+	{ KEY_F10,	KEY_MUTE },
+	{ KEY_F11,	KEY_VOLUMEDOWN },
+	{ KEY_F12,	KEY_VOLUMEUP },
+	{ KEY_RIGHT,	KEY_END },
+	{ KEY_LEFT,	KEY_HOME },
+	{ KEY_DOWN,	KEY_PAGEDOWN },
+	{ KEY_UP,	KEY_PAGEUP },
+};
+
+static const struct applespi_key_translation apple_iso_keyboard[] = {
+	{ KEY_GRAVE,	KEY_102ND },
+	{ KEY_102ND,	KEY_GRAVE },
 };
 
 static u8 *acpi_dsm_uuid = "a0b5b7c6-1318-441c-b0c9-fe695eaf949b";
@@ -684,16 +694,25 @@ static unsigned int
 applespi_code_to_key(u8 code, int fn_pressed)
 {
 	int i;
+	unsigned int key = applespi_scancodes[code];
 
 	if (fn_pressed) {
 		for (i=0; i<ARRAY_SIZE(applespi_fn_codes); i++) {
-			if (applespi_fn_codes[i].from == code) {
+			if (applespi_fn_codes[i].from == key) {
 				return applespi_fn_codes[i].to;
 			}
 		}
 	}
 
-	return applespi_scancodes[code];
+	if (iso_layout) {
+		for (i=0; i<ARRAY_SIZE(apple_iso_keyboard); i++) {
+			if (apple_iso_keyboard[i].from == key) {
+				return apple_iso_keyboard[i].to;
+			}
+		}
+	}
+
+	return key;
 }
 
 static void
-- 
2.12.2