Input: add vmmouse driver

VMMouse enables low-latency mouse-cursor-movements for VMWare and QEMU
guests.  By removing the guest cursor and using the host as a guest cursor
the cursor movement appears instant although in reality there is some lag.
To be able to do this, the host's view of the cursor position must exactly
match the guest's view and an absolute pointer device is needed. Enter the
VMMouse. While the VMMouse driver has historically been an Xorg user-space
driver, implementing it as a kernel imput driver enables rootless Xorg and
new compositing display servers for VMware guests.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/drivers/input/mouse/vmmouse.h b/drivers/input/mouse/vmmouse.h
new file mode 100644
index 000000000000..6f126017a24c
--- /dev/null
+++ b/drivers/input/mouse/vmmouse.h
@@ -0,0 +1,30 @@
+/*
+ * Driver for Virtual PS/2 Mouse on VMware and QEMU hypervisors.
+ *
+ * Copyright (C) 2014, VMware, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#ifndef _VMMOUSE_H
+#define _VMMOUSE_H
+
+#ifdef CONFIG_MOUSE_PS2_VMMOUSE
+#define VMMOUSE_PSNAME  "VirtualPS/2"
+
+int vmmouse_detect(struct psmouse *psmouse, bool set_properties);
+int vmmouse_init(struct psmouse *psmouse);
+#else
+static inline int vmmouse_detect(struct psmouse *psmouse, bool set_properties)
+{
+	return -ENOSYS;
+}
+static inline int vmmouse_init(struct psmouse *psmouse)
+{
+	return -ENOSYS;
+}
+#endif
+
+#endif