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-rw-r--r--drivers/char/keyboard.c42
-rw-r--r--include/linux/keyboard.h11
-rw-r--r--include/linux/notifier.h9
3 files changed, 56 insertions, 6 deletions
diff --git a/drivers/char/keyboard.c b/drivers/char/keyboard.c
index 212276affa1f..d54f4a3ae340 100644
--- a/drivers/char/keyboard.c
+++ b/drivers/char/keyboard.c
@@ -42,6 +42,7 @@
#include <linux/sysrq.h>
#include <linux/input.h>
#include <linux/reboot.h>
+#include <linux/notifier.h>
extern void ctrl_alt_del(void);
@@ -81,7 +82,8 @@ void compute_shiftstate(void);
typedef void (k_handler_fn)(struct vc_data *vc, unsigned char value,
char up_flag);
static k_handler_fn K_HANDLERS;
-static k_handler_fn *k_handler[16] = { K_HANDLERS };
+k_handler_fn *k_handler[16] = { K_HANDLERS };
+EXPORT_SYMBOL_GPL(k_handler);
#define FN_HANDLERS\
fn_null, fn_enter, fn_show_ptregs, fn_show_mem,\
@@ -160,6 +162,23 @@ static int sysrq_alt_use;
static int sysrq_alt;
/*
+ * Notifier list for console keyboard events
+ */
+static ATOMIC_NOTIFIER_HEAD(keyboard_notifier_list);
+
+int register_keyboard_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_register(&keyboard_notifier_list, nb);
+}
+EXPORT_SYMBOL_GPL(register_keyboard_notifier);
+
+int unregister_keyboard_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_unregister(&keyboard_notifier_list, nb);
+}
+EXPORT_SYMBOL_GPL(unregister_keyboard_notifier);
+
+/*
* Translation of scancodes to keycodes. We set them on only the first
* keyboard in the list that accepts the scancode and keycode.
* Explanation for not choosing the first attached keyboard anymore:
@@ -1130,6 +1149,7 @@ static void kbd_keycode(unsigned int keycode, int down, int hw_raw)
unsigned char type, raw_mode;
struct tty_struct *tty;
int shift_final;
+ struct keyboard_notifier_param param = { .vc = vc, .value = keycode, .down = down };
tty = vc->vc_tty;
@@ -1217,10 +1237,11 @@ static void kbd_keycode(unsigned int keycode, int down, int hw_raw)
return;
}
- shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate;
+ param.shift = shift_final = (shift_state | kbd->slockstate) ^ kbd->lockstate;
key_map = key_maps[shift_final];
- if (!key_map) {
+ if (atomic_notifier_call_chain(&keyboard_notifier_list, KBD_KEYCODE, &param) == NOTIFY_STOP || !key_map) {
+ atomic_notifier_call_chain(&keyboard_notifier_list, KBD_UNBOUND_KEYCODE, &param);
compute_shiftstate();
kbd->slockstate = 0;
return;
@@ -1237,6 +1258,9 @@ static void kbd_keycode(unsigned int keycode, int down, int hw_raw)
type = KTYP(keysym);
if (type < 0xf0) {
+ param.value = keysym;
+ if (atomic_notifier_call_chain(&keyboard_notifier_list, KBD_UNICODE, &param) == NOTIFY_STOP)
+ return;
if (down && !raw_mode)
to_utf8(vc, keysym);
return;
@@ -1244,9 +1268,6 @@ static void kbd_keycode(unsigned int keycode, int down, int hw_raw)
type -= 0xf0;
- if (raw_mode && type != KT_SPEC && type != KT_SHIFT)
- return;
-
if (type == KT_LETTER) {
type = KT_LATIN;
if (vc_kbd_led(kbd, VC_CAPSLOCK)) {
@@ -1255,9 +1276,18 @@ static void kbd_keycode(unsigned int keycode, int down, int hw_raw)
keysym = key_map[keycode];
}
}
+ param.value = keysym;
+
+ if (atomic_notifier_call_chain(&keyboard_notifier_list, KBD_KEYSYM, &param) == NOTIFY_STOP)
+ return;
+
+ if (raw_mode && type != KT_SPEC && type != KT_SHIFT)
+ return;
(*k_handler[type])(vc, keysym & 0xff, !down);
+ atomic_notifier_call_chain(&keyboard_notifier_list, KBD_POST_KEYSYM, &param);
+
if (type != KT_SLOCK)
kbd->slockstate = 0;
}
diff --git a/include/linux/keyboard.h b/include/linux/keyboard.h
index 33b5c2e325b9..65c2d70853e9 100644
--- a/include/linux/keyboard.h
+++ b/include/linux/keyboard.h
@@ -23,10 +23,21 @@
#define MAX_NR_OF_USER_KEYMAPS 256 /* should be at least 7 */
#ifdef __KERNEL__
+struct notifier_block;
extern const int NR_TYPES;
extern const int max_vals[];
extern unsigned short *key_maps[MAX_NR_KEYMAPS];
extern unsigned short plain_map[NR_KEYS];
+
+struct keyboard_notifier_param {
+ struct vc_data *vc; /* VC on which the keyboard press was done */
+ int down; /* Pressure of the key? */
+ int shift; /* Current shift mask */
+ unsigned int value; /* keycode, unicode value or keysym */
+};
+
+extern int register_keyboard_notifier(struct notifier_block *nb);
+extern int unregister_keyboard_notifier(struct notifier_block *nb);
#endif
#define MAX_NR_FUNC 256 /* max nr of strings assigned to keys */
diff --git a/include/linux/notifier.h b/include/linux/notifier.h
index fad7ff17e468..bd3788084fa9 100644
--- a/include/linux/notifier.h
+++ b/include/linux/notifier.h
@@ -231,5 +231,14 @@ static inline int notifier_to_errno(int ret)
#define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */
#define PM_POST_SUSPEND 0x0004 /* Suspend finished */
+/* Console keyboard events.
+ * Note: KBD_KEYCODE is always sent before KBD_UNBOUND_KEYCODE, KBD_UNICODE and
+ * KBD_KEYSYM. */
+#define KBD_KEYCODE 0x0001 /* Keyboard keycode, called before any other */
+#define KBD_UNBOUND_KEYCODE 0x0002 /* Keyboard keycode which is not bound to any other */
+#define KBD_UNICODE 0x0003 /* Keyboard unicode */
+#define KBD_KEYSYM 0x0004 /* Keyboard keysym */
+#define KBD_POST_KEYSYM 0x0005 /* Called after keyboard keysym interpretation */
+
#endif /* __KERNEL__ */
#endif /* _LINUX_NOTIFIER_H */