kbd leds: usb kbd

Add led status notification support to the usb kbd driver.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/usb-hid.c

@@ -600,12 +600,20 @@ static int usb_keyboard_poll(USBKeyboardState *s, uint8_t *buf, int len)
 static int usb_keyboard_write(USBKeyboardState *s, uint8_t *buf, int len)
 {
     if (len > 0) {
+        int ledstate = 0;
         /* 0x01: Num Lock LED
          * 0x02: Caps Lock LED
          * 0x04: Scroll Lock LED
          * 0x08: Compose LED
          * 0x10: Kana LED */
         s->leds = buf[0];
+        if (s->leds & 0x04)
+            ledstate |= QEMU_SCROLL_LOCK_LED;
+        if (s->leds & 0x01)
+            ledstate |= QEMU_NUM_LOCK_LED;
+        if (s->leds & 0x02)
+            ledstate |= QEMU_CAPS_LOCK_LED;
+        kbd_put_ledstate(ledstate);
     }
     return 0;
 }