write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/drivers/hid/hid-apple.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *  USB HID quirks support for Linux
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  *
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@@ -9,10 +10,6 @@
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  */
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 /*
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms of the GNU General Public License as published by the Free
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- * Software Foundation; either version 2 of the License, or (at your option)
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- * any later version.
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  */
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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@@ -53,6 +50,12 @@
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 MODULE_PARM_DESC(swap_opt_cmd, "Swap the Option (\"Alt\") and Command (\"Flag\") keys. "
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 		"(For people who want to keep Windows PC keyboard muscle memory. "
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 		"[0] = as-is, Mac layout. 1 = swapped, Windows layout.)");
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+
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+static unsigned int swap_fn_leftctrl;
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+module_param(swap_fn_leftctrl, uint, 0644);
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+MODULE_PARM_DESC(swap_fn_leftctrl, "Swap the Fn and left Control keys. "
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+		"(For people who want to keep PC keyboard muscle memory. "
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+		"[0] = as-is, Mac layout, 1 = swapped, PC layout)");
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 struct apple_sc {
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 	unsigned long quirks;
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@@ -166,6 +169,11 @@
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 	{ }
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 };
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+static const struct apple_key_translation swapped_fn_leftctrl_keys[] = {
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+	{ KEY_FN, KEY_LEFTCTRL },
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+	{ }
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+};
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+
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 static const struct apple_key_translation *apple_find_translation(
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 		const struct apple_key_translation *table, u16 from)
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 {
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@@ -187,9 +195,11 @@
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 	bool do_translate;
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 	u16 code = 0;
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-	if (usage->code == KEY_FN) {
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+	u16 fn_keycode = (swap_fn_leftctrl) ? (KEY_LEFTCTRL) : (KEY_FN);
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+
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+	if (usage->code == fn_keycode) {
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 		asc->fn_on = !!value;
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-		input_event(input, usage->type, usage->code, value);
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+		input_event(input, usage->type, KEY_FN, value);
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 		return 1;
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 	}
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@@ -274,6 +284,14 @@
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 		}
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 	}
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+	if (swap_fn_leftctrl) {
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+		trans = apple_find_translation(swapped_fn_leftctrl_keys, usage->code);
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+		if (trans) {
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+			input_event(input, usage->type, trans->to, value);
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+			return 1;
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+		}
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+	}
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+
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 	return 0;
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 }
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@@ -344,6 +362,11 @@
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 	for (trans = apple_iso_keyboard; trans->from; trans++)
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 		set_bit(trans->to, input->keybit);
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+
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+	if (swap_fn_leftctrl) {
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+		for (trans = swapped_fn_leftctrl_keys; trans->from; trans++)
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+			set_bit(trans->to, input->keybit);
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+	}
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 }
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 static int apple_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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@@ -487,6 +510,8 @@
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 		.driver_data = APPLE_HAS_FN },
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 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_REVB_ISO),
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 		.driver_data = APPLE_HAS_FN },
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+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_REVB_ISO),
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+		.driver_data = APPLE_HAS_FN },
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 	{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_REVB_JIS),
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 		.driver_data = APPLE_HAS_FN },
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 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),