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HID: apple: option to swap the 'Option' ("Alt") and 'Command' ("Flag") keys.

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Use case: people who use both Apple and PC keyboards regularly, and desire to
keep&use their PC muscle memory.

A particular use case: an Apple compact external keyboard connected to a PC
laptop. (This use case can't be covered well by X.org key remappings etc.)

Signed-off-by: Nanno Langstraat <langstr@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Nanno Langstraat 2013-10-14 16:07:15 +02:00 committed by Jiri Kosina
parent 403cfb53fb
commit 43c831468b
1 changed files with 22 additions and 0 deletions
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22
drivers/hid/hid-apple.c
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@ -46,6 +46,12 @@ module_param(iso_layout, uint, 0644);
MODULE_PARM_DESC(iso_layout, "Enable/Disable hardcoded ISO-layout of the keyboard. "
"(0 = disabled, [1] = enabled)");
static unsigned int swap_opt_cmd = 0;
module_param(swap_opt_cmd, uint, 0644);
MODULE_PARM_DESC(swap_opt_cmd, "Swap the Option (\"Alt\") and Command (\"Flag\") keys. "
"(For people who want to keep Windows PC keyboard muscle memory. "
"[0] = as-is, Mac layout. 1 = swapped, Windows layout.)");
struct apple_sc {
unsigned long quirks;
unsigned int fn_on;
@ -150,6 +156,14 @@ static const struct apple_key_translation apple_iso_keyboard[] = {
{ }
};
static const struct apple_key_translation swapped_option_cmd_keys[] = {
{ KEY_LEFTALT, KEY_LEFTMETA },
{ KEY_LEFTMETA, KEY_LEFTALT },
{ KEY_RIGHTALT, KEY_RIGHTMETA },
{ KEY_RIGHTMETA,KEY_RIGHTALT },
{ }
};
static const struct apple_key_translation *apple_find_translation(
const struct apple_key_translation *table, u16 from)
{
@ -242,6 +256,14 @@ static int hidinput_apple_event(struct hid_device *hid, struct input_dev *input,
}
}
if (swap_opt_cmd) {
trans = apple_find_translation(swapped_option_cmd_keys, usage->code);
if (trans) {
input_event(input, usage->type, trans->to, value);
return 1;
}
}
return 0;
}