[PATCH 3/3] HID: apple: Add fn mapping for MacBook Pros with Touch Bar

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From: Aditya Garg <gargaditya08@xxxxxxxx>

This patch adds the Fn mapping for keyboards on certain T2 Macs.

Signed-off-by: Aditya Garg <gargaditya08@xxxxxxxx>
---
 drivers/hid/hid-apple.c | 70 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)

diff --git a/drivers/hid/hid-apple.c b/drivers/hid/hid-apple.c
index 823021c24..c4d21c617 100644
--- a/drivers/hid/hid-apple.c
+++ b/drivers/hid/hid-apple.c
@@ -142,6 +142,51 @@ static const struct apple_key_translation macbookair_fn_keys[] = {
 	{ }
 };
 
+static const struct apple_key_translation macbookpro_no_esc_fn_keys[] = {
+	{ KEY_BACKSPACE, KEY_DELETE },
+	{ KEY_ENTER,	KEY_INSERT },
+	{ KEY_GRAVE,	KEY_ESC },
+	{ KEY_1,	KEY_F1 },
+	{ KEY_2,	KEY_F2 },
+	{ KEY_3,	KEY_F3 },
+	{ KEY_4,	KEY_F4 },
+	{ KEY_5,	KEY_F5 },
+	{ KEY_6,	KEY_F6 },
+	{ KEY_7,	KEY_F7 },
+	{ KEY_8,	KEY_F8 },
+	{ KEY_9,	KEY_F9 },
+	{ KEY_0,	KEY_F10 },
+	{ KEY_MINUS,	KEY_F11 },
+	{ KEY_EQUAL,	KEY_F12 },
+	{ KEY_UP,	KEY_PAGEUP },
+	{ KEY_DOWN,	KEY_PAGEDOWN },
+	{ KEY_LEFT,	KEY_HOME },
+	{ KEY_RIGHT,	KEY_END },
+	{ }
+};
+
+static const struct apple_key_translation macbookpro_dedicated_esc_fn_keys[] = {
+	{ KEY_BACKSPACE, KEY_DELETE },
+	{ KEY_ENTER,	KEY_INSERT },
+	{ KEY_1,	KEY_F1 },
+	{ KEY_2,	KEY_F2 },
+	{ KEY_3,	KEY_F3 },
+	{ KEY_4,	KEY_F4 },
+	{ KEY_5,	KEY_F5 },
+	{ KEY_6,	KEY_F6 },
+	{ KEY_7,	KEY_F7 },
+	{ KEY_8,	KEY_F8 },
+	{ KEY_9,	KEY_F9 },
+	{ KEY_0,	KEY_F10 },
+	{ KEY_MINUS,	KEY_F11 },
+	{ KEY_EQUAL,	KEY_F12 },
+	{ KEY_UP,	KEY_PAGEUP },
+	{ KEY_DOWN,	KEY_PAGEDOWN },
+	{ KEY_LEFT,	KEY_HOME },
+	{ KEY_RIGHT,	KEY_END },
+	{ }
+};
+
 static const struct apple_key_translation apple_fn_keys[] = {
 	{ KEY_BACKSPACE, KEY_DELETE },
 	{ KEY_ENTER,	KEY_INSERT },
@@ -272,6 +317,25 @@ static int hidinput_apple_event(struct hid_device *hid, struct input_dev *input,
 		else if (hid->product >= USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI &&
 				hid->product <= USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS)
 			table = macbookair_fn_keys;
+		else if (hid->product >= USB_DEVICE_ID_APPLE_WELLSPRINGT2_J140K &&
+				hid->product <= USB_DEVICE_ID_APPLE_WELLSPRINGT2_J152F) {
+				switch (hid->product) {
+				/* MacBook Pros with esc on the touchbar */
+				case USB_DEVICE_ID_APPLE_WELLSPRINGT2_J132:
+				case USB_DEVICE_ID_APPLE_WELLSPRINGT2_J680:
+				case USB_DEVICE_ID_APPLE_WELLSPRINGT2_J213:
+					table = macbookpro_no_esc_fn_keys;
+					break;
+				/* MacBook Pros with a dedicated esc key */
+				case USB_DEVICE_ID_APPLE_WELLSPRINGT2_J214K:
+				case USB_DEVICE_ID_APPLE_WELLSPRINGT2_J223:
+				case USB_DEVICE_ID_APPLE_WELLSPRINGT2_J152F:
+					table = macbookpro_dedicated_esc_fn_keys;
+					break;
+				default:
+					table = apple_fn_keys;
+				}
+			}
 		else if (hid->product < 0x21d || hid->product >= 0x300)
 			table = powerbook_fn_keys;
 		else
@@ -480,6 +544,12 @@ static void apple_setup_input(struct input_dev *input)
 	set_bit(KEY_NUMLOCK, input->keybit);
 
 	/* Enable all needed keys */
+	for (trans = macbookpro_no_esc_fn_keys; trans->from; trans++)
+		set_bit(trans->to, input->keybit);
+
+	for (trans = macbookpro_dedicated_esc_fn_keys; trans->from; trans++)
+		set_bit(trans->to, input->keybit);
+
 	for (trans = apple_fn_keys; trans->from; trans++)
 		set_bit(trans->to, input->keybit);
 
-- 
2.25.1






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