HID: allow disabling hard-coded ISO-layout for Apple keyboards

This patch adds a new option named "iso_layout" to the driver
"hid-apple.ko", to allow disabling of the hard-coded ISO-layout.

Disabling the hard-coded layout solves the problem that the kernel-module only
works perfectly for the english/american version of the Apple aluminum
keyboard. Other versions have swapped keys, e.g. the "<"-key  is swapped with
"^"-key on the german keyboard. There is a very long bug-entry on Launchpad to
this problem:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/214786

Signed-off-by: Stefan Glasenhardt <stefan@glasen-hardt.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-apple.c b/drivers/hid/hid-apple.c
index 4b96e7a..1433cbb 100644 (file)
--- a/drivers/hid/hid-apple.c
+++ b/drivers/hid/hid-apple.c
@@ -40,6 +40,11 @@ module_param(fnmode, uint, 0644);
 MODULE_PARM_DESC(fnmode, "Mode of fn key on Apple keyboards (0 = disabled, "
                "[1] = fkeyslast, 2 = fkeysfirst)");
 
+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 apple_sc {
        unsigned long quirks;
        unsigned int fn_on;
@@ -199,11 +204,13 @@ static int hidinput_apple_event(struct hid_device *hid, struct input_dev *input,
                }
        }
 
-       if (asc->quirks & APPLE_ISO_KEYBOARD) {
-               trans = apple_find_translation(apple_iso_keyboard, usage->code);
-               if (trans) {
-                       input_event(input, usage->type, trans->to, value);
-                       return 1;
+        if (iso_layout) {
+               if (asc->quirks & APPLE_ISO_KEYBOARD) {
+                       trans = apple_find_translation(apple_iso_keyboard, usage->code);
+                       if (trans) {
+                               input_event(input, usage->type, trans->to, value);
+                               return 1;
+                       }
                }
        }