From 052876f8e5aec887d22c4d06e54aa5531ffcec75 Mon Sep 17 00:00:00 2001 From: Benjamin Tissoires Date: Fri, 18 Dec 2015 17:20:09 -0800 Subject: Input: uinput - add new UINPUT_DEV_SETUP and UI_ABS_SETUP ioctl This adds two new ioctls, UINPUT_DEV_SETUP and UI_ABS_SETUP, that replaces the old device setup method (by write()'ing "struct uinput_user_dev" to the node). The old method is not easily extendable and requires huge payloads. Furthermore, overloading write() without properly versioned objects is error-prone. Therefore, we introduce two new ioctls to replace the old method. These ioctls support all features of the old method, plus a "resolution" field for absinfo. Furthermore, it's properly forward-compatible to new ABS codes and a growing "struct input_absinfo" structure. UI_ABS_SETUP also allows user-space to skip unknown axes if not set. There is no need to copy the whole array temporarily into the kernel, but instead the caller issues several ioctl where we copy each value manually. Signed-off-by: David Herrmann Signed-off-by: Benjamin Tissoires Reviewed-by: David Herrmann Signed-off-by: Dmitry Torokhov --- include/linux/uinput.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/uinput.h b/include/linux/uinput.h index 0994c0d01a09..75de43da2301 100644 --- a/include/linux/uinput.h +++ b/include/linux/uinput.h @@ -20,6 +20,11 @@ * Author: Aristeu Sergio Rozanski Filho * * Changes/Revisions: + * 0.5 08/13/2015 (David Herrmann & + * Benjamin Tissoires ) + * - add UI_DEV_SETUP ioctl + * - add UI_ABS_SETUP ioctl + * - add UI_GET_VERSION ioctl * 0.4 01/09/2014 (Benjamin Tissoires ) * - add UI_GET_SYSNAME ioctl * 0.3 24/05/2006 (Anssi Hannula ) -- cgit v1.2.3