From 6aa0af1be4cb2022d0b8c2b3ce9855f5a60404fd Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Fri, 12 Mar 2010 12:01:24 -0300
Subject: [PATCH 1/4] kbd leds: infrastructure

RH-Author: Gerd Hoffmann <kraxel@redhat.com>
Message-id: <1268395287-16378-2-git-send-email-kraxel@redhat.com>
Patchwork-id: 7683
O-Subject: [RHEL-5 kvm PATCH 1/4] kbd leds: infrastructure
Bugzilla: 517814
RH-Acked-by: Zachary Amsden <zamsden@redhat.com>
RH-Acked-by: Juan Quintela <quintela@redhat.com>
RH-Acked-by: Markus Armbruster <armbru@redhat.com>

Adds infrastructure for keyboard led status tracking to qemu.

upstream: commit 03a23a85f4c2588778d7d58ae49e5521d79d1b06
---
 qemu/console.h |   15 +++++++++++++++
 qemu/vl.c      |   31 +++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+), 0 deletions(-)

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 qemu/console.h |   15 +++++++++++++++
 qemu/vl.c      |   31 +++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+), 0 deletions(-)

diff --git a/qemu/console.h b/qemu/console.h
index d2d1eeb..b2a2939 100644
--- a/qemu/console.h
+++ b/qemu/console.h
@@ -9,10 +9,16 @@
 #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 {
@@ -25,13 +31,22 @@ typedef struct QEMUPutMouseEntry {
     struct QEMUPutMouseEntry *next;
 } QEMUPutMouseEntry;
 
+typedef struct QEMUPutLEDEntry {
+    QEMUPutLEDEvent *put_led;
+    void *opaque;
+    TAILQ_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/qemu/vl.c b/qemu/vl.c
index 621c027..75ce341 100644
--- a/qemu/vl.c
+++ b/qemu/vl.c
@@ -594,6 +594,7 @@ 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 TAILQ_HEAD(, QEMUPutLEDEntry) led_handlers = TAILQ_HEAD_INITIALIZER(led_handlers);
 
 void qemu_add_kbd_event_handler(QEMUPutKBDEvent *func, void *opaque)
 {
@@ -665,6 +666,27 @@ 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;
+    TAILQ_INSERT_TAIL(&led_handlers, s, next);
+    return s;
+}
+
+void qemu_remove_led_event_handler(QEMUPutLEDEntry *entry)
+{
+    if (entry == NULL)
+        return;
+    TAILQ_REMOVE(&led_handlers, entry, next);
+    qemu_free(entry);
+}
+
 void kbd_put_keycode(int keycode)
 {
     if (qemu_put_kbd_event) {
@@ -672,6 +694,15 @@ void kbd_put_keycode(int keycode)
     }
 }
 
+void kbd_put_ledstate(int ledstate)
+{
+    QEMUPutLEDEntry *cursor;
+
+    TAILQ_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;
-- 
1.7.0.3