Input: add support for Braille devices

- Add KEY_BRL_* input keys and K_BRL_* keycodes;
- Add emulation of how braille keyboards usually combine braille dots
  to the console keyboard driver;
- Add handling of unicode U+28xy diacritics.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/linux/keyboard.h b/include/linux/keyboard.h
index 08488042d74a..de76843bbe8a 100644
--- a/include/linux/keyboard.h
+++ b/include/linux/keyboard.h
@@ -44,6 +44,7 @@ extern unsigned short plain_map[NR_KEYS];
 #define KT_ASCII        9
 #define KT_LOCK         10
 #define KT_SLOCK        12
+#define KT_BRL          14
 
 #define K(t,v)          (((t)<<8)|(v))
 #define KTYP(x)         ((x) >> 8)
@@ -427,5 +428,17 @@ extern unsigned short plain_map[NR_KEYS];
 
 #define NR_LOCK         8
 
+#define K_BRL_BLANK     K(KT_BRL, 0)
+#define K_BRL_DOT1      K(KT_BRL, 1)
+#define K_BRL_DOT2      K(KT_BRL, 2)
+#define K_BRL_DOT3      K(KT_BRL, 3)
+#define K_BRL_DOT4      K(KT_BRL, 4)
+#define K_BRL_DOT5      K(KT_BRL, 5)
+#define K_BRL_DOT6      K(KT_BRL, 6)
+#define K_BRL_DOT7      K(KT_BRL, 7)
+#define K_BRL_DOT8      K(KT_BRL, 8)
+
+#define NR_BRL          9
+
 #define MAX_DIACR       256
 #endif