Input: add getkeycode and setkeycode methods

Allow drivers to implement their own get and set keycode methods. This
will allow drivers to change their keymaps without allocating huge
tables covering entire range of possible scancodes.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 9 insertions, 20 deletions

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 6439f378f6cc..64b47de052bb 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -434,32 +434,21 @@ static long evdev_ioctl_handler(struct file *file, unsigned int cmd,
                 case EVIOCGKEYCODE:
                         if (get_user(t, ip))
                                 return -EFAULT;
-                        if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
-                                return -EINVAL;
-                        if (put_user(INPUT_KEYCODE(dev, t), ip + 1))
+
+                        error = dev->getkeycode(dev, t, &v);
+                        if (error)
+                                return error;
+
+                        if (put_user(v, ip + 1))
                                 return -EFAULT;
+
                         return 0;
 
                 case EVIOCSKEYCODE:
-                        if (get_user(t, ip))
-                                return -EFAULT;
-                        if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
-                                return -EINVAL;
-                        if (get_user(v, ip + 1))
+                        if (get_user(t, ip) || get_user(v, ip + 1))
                                 return -EFAULT;
-                        if (v < 0 || v > KEY_MAX)
-                                return -EINVAL;
-                        if (dev->keycodesize < sizeof(v) && (v >> (dev->keycodesize * 8)))
-                                return -EINVAL;
-
-                        u = SET_INPUT_KEYCODE(dev, t, v);
-                        clear_bit(u, dev->keybit);
-                        set_bit(v, dev->keybit);
-                        for (i = 0; i < dev->keycodemax; i++)
-                                if (INPUT_KEYCODE(dev, i) == u)
-                                        set_bit(u, dev->keybit);
 
-                        return 0;
+                        return dev->setkeycode(dev, t, v);
 
                 case EVIOCSFF:
                         if (copy_from_user(&effect, p, sizeof(effect)))