Basic braille screen reader support

This adds a minimalistic braille screen reader support.  This is meant to
be used by blind people e.g.  on boot failures or when / cannot be mounted
etc and thus the userland screen readers can not work.

[akpm@linux-foundation.org: fix exports]
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Jiri Kosina <jikos@jikos.cz>
Cc: Dmitry Torokhov <dtor@mail.ru>
Acked-by: Alan Cox <alan@redhat.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/console.h b/include/linux/console.h
index a5f88a6a259d..a4f27fbdf549 100644
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -91,6 +91,7 @@ void give_up_console(const struct consw *sw);
 #define CON_ENABLED     (4)
 #define CON_BOOT        (8)
 #define CON_ANYTIME     (16) /* Safe to call when cpu is offline */
+#define CON_BRL         (32) /* Used for a braille device */
 
 struct console {
         char    name[16];
@@ -121,6 +122,9 @@ extern struct tty_driver *console_device(int *);
 extern void console_stop(struct console *);
 extern void console_start(struct console *);
 extern int is_console_locked(void);
+extern int braille_register_console(struct console *, int index,
+                char *console_options, char *braille_options);
+extern int braille_unregister_console(struct console *);
 
 extern int console_suspend_enabled;