From 03a23a85f4c2588778d7d58ae49e5521d79d1b06 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Fri, 26 Feb 2010 17:17:36 +0100
Subject: kbd leds: infrastructure

Adds infrastructure for keyboard led status tracking to qemu.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
 console.h | 15 +++++++++++++++
 input.c   | 31 +++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/console.h b/console.h
index 916859d5bc..71e8ff230c 100644
--- a/console.h
+++ b/console.h
@@ -10,10 +10,16 @@
 #define MOUSE_EVENT_RBUTTON 0x02
 #define MOUSE_EVENT_MBUTTON 0x04
 
+/* identical to the ps/2 keyboard bits */
+#define QEMU_SCROLL_LOCK_LED (1 << 0)
+#define QEMU_NUM_LOCK_LED    (1 << 1)
+#define QEMU_CAPS_LOCK_LED   (1 << 2)
+
 /* in ms */
 #define GUI_REFRESH_INTERVAL 30
 
 typedef void QEMUPutKBDEvent(void *opaque, int keycode);
+typedef void QEMUPutLEDEvent(void *opaque, int ledstate);
 typedef void QEMUPutMouseEvent(void *opaque, int dx, int dy, int dz, int buttons_state);
 
 typedef struct QEMUPutMouseEntry {
@@ -26,13 +32,22 @@ typedef struct QEMUPutMouseEntry {
     struct QEMUPutMouseEntry *next;
 } QEMUPutMouseEntry;
 
+typedef struct QEMUPutLEDEntry {
+    QEMUPutLEDEvent *put_led;
+    void *opaque;
+    QTAILQ_ENTRY(QEMUPutLEDEntry) next;
+} QEMUPutLEDEntry;
+
 void qemu_add_kbd_event_handler(QEMUPutKBDEvent *func, void *opaque);
 QEMUPutMouseEntry *qemu_add_mouse_event_handler(QEMUPutMouseEvent *func,
                                                 void *opaque, int absolute,
                                                 const char *name);
 void qemu_remove_mouse_event_handler(QEMUPutMouseEntry *entry);
+QEMUPutLEDEntry *qemu_add_led_event_handler(QEMUPutLEDEvent *func, void *opaque);
+void qemu_remove_led_event_handler(QEMUPutLEDEntry *entry);
 
 void kbd_put_keycode(int keycode);
+void kbd_put_ledstate(int ledstate);
 void kbd_mouse_event(int dx, int dy, int dz, int buttons_state);
 int kbd_mouse_is_absolute(void);
 
diff --git a/input.c b/input.c
index 955b9ab04d..baaa4c60c6 100644
--- a/input.c
+++ b/input.c
@@ -33,6 +33,7 @@ static QEMUPutKBDEvent *qemu_put_kbd_event;
 static void *qemu_put_kbd_event_opaque;
 static QEMUPutMouseEntry *qemu_put_mouse_event_head;
 static QEMUPutMouseEntry *qemu_put_mouse_event_current;
+static QTAILQ_HEAD(, QEMUPutLEDEntry) led_handlers = QTAILQ_HEAD_INITIALIZER(led_handlers);
 
 void qemu_add_kbd_event_handler(QEMUPutKBDEvent *func, void *opaque)
 {
@@ -102,6 +103,27 @@ void qemu_remove_mouse_event_handler(QEMUPutMouseEntry *entry)
     qemu_free(entry);
 }
 
+QEMUPutLEDEntry *qemu_add_led_event_handler(QEMUPutLEDEvent *func,
+                                            void *opaque)
+{
+    QEMUPutLEDEntry *s;
+
+    s = qemu_mallocz(sizeof(QEMUPutLEDEntry));
+
+    s->put_led = func;
+    s->opaque = opaque;
+    QTAILQ_INSERT_TAIL(&led_handlers, s, next);
+    return s;
+}
+
+void qemu_remove_led_event_handler(QEMUPutLEDEntry *entry)
+{
+    if (entry == NULL)
+        return;
+    QTAILQ_REMOVE(&led_handlers, entry, next);
+    qemu_free(entry);
+}
+
 void kbd_put_keycode(int keycode)
 {
     if (qemu_put_kbd_event) {
@@ -109,6 +131,15 @@ void kbd_put_keycode(int keycode)
     }
 }
 
+void kbd_put_ledstate(int ledstate)
+{
+    QEMUPutLEDEntry *cursor;
+
+    QTAILQ_FOREACH(cursor, &led_handlers, next) {
+        cursor->put_led(cursor->opaque, ledstate);
+    }
+}
+
 void kbd_mouse_event(int dx, int dy, int dz, int buttons_state)
 {
     QEMUPutMouseEvent *mouse_event;
-- 
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