e2be04c7f9
Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be. This makes it hard for
compliance tools to determine the correct license.
Update these files with an SPDX license identifier. The identifier was
chosen based on the license information in the file.
GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:
NOTE! This copyright does *not* cover user programs that use kernel
services by normal system calls - this is merely considered normal use
of the kernel, and does *not* fall under the heading of "derived work".
This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.
Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier. The format
is:
((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)
SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text. The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne. See the previous patch in this series for the
methodology of how this patch was researched.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
233 lines
9.1 KiB
C
233 lines
9.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* User level driver support for input subsystem
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*
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* Heavily based on evdev.c by Vojtech Pavlik
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
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*
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* Changes/Revisions:
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* 0.5 08/13/2015 (David Herrmann <dh.herrmann@gmail.com> &
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* Benjamin Tissoires <benjamin.tissoires@redhat.com>)
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* - add UI_DEV_SETUP ioctl
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* - add UI_ABS_SETUP ioctl
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* - add UI_GET_VERSION ioctl
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* 0.4 01/09/2014 (Benjamin Tissoires <benjamin.tissoires@redhat.com>)
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* - add UI_GET_SYSNAME ioctl
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* 0.3 24/05/2006 (Anssi Hannula <anssi.hannulagmail.com>)
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* - update ff support for the changes in kernel interface
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* - add UINPUT_VERSION
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* 0.2 16/10/2004 (Micah Dowty <micah@navi.cx>)
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* - added force feedback support
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* - added UI_SET_PHYS
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* 0.1 20/06/2002
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* - first public version
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*/
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#ifndef _UAPI__UINPUT_H_
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#define _UAPI__UINPUT_H_
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#include <linux/types.h>
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#include <linux/input.h>
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#define UINPUT_VERSION 5
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#define UINPUT_MAX_NAME_SIZE 80
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struct uinput_ff_upload {
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__u32 request_id;
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__s32 retval;
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struct ff_effect effect;
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struct ff_effect old;
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};
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struct uinput_ff_erase {
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__u32 request_id;
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__s32 retval;
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__u32 effect_id;
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};
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/* ioctl */
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#define UINPUT_IOCTL_BASE 'U'
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#define UI_DEV_CREATE _IO(UINPUT_IOCTL_BASE, 1)
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#define UI_DEV_DESTROY _IO(UINPUT_IOCTL_BASE, 2)
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struct uinput_setup {
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struct input_id id;
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char name[UINPUT_MAX_NAME_SIZE];
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__u32 ff_effects_max;
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};
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/**
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* UI_DEV_SETUP - Set device parameters for setup
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*
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* This ioctl sets parameters for the input device to be created. It
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* supersedes the old "struct uinput_user_dev" method, which wrote this data
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* via write(). To actually set the absolute axes UI_ABS_SETUP should be
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* used.
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*
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* The ioctl takes a "struct uinput_setup" object as argument. The fields of
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* this object are as follows:
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* id: See the description of "struct input_id". This field is
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* copied unchanged into the new device.
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* name: This is used unchanged as name for the new device.
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* ff_effects_max: This limits the maximum numbers of force-feedback effects.
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* See below for a description of FF with uinput.
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*
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* This ioctl can be called multiple times and will overwrite previous values.
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* If this ioctl fails with -EINVAL, it is recommended to use the old
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* "uinput_user_dev" method via write() as a fallback, in case you run on an
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* old kernel that does not support this ioctl.
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*
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* This ioctl may fail with -EINVAL if it is not supported or if you passed
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* incorrect values, -ENOMEM if the kernel runs out of memory or -EFAULT if the
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* passed uinput_setup object cannot be read/written.
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* If this call fails, partial data may have already been applied to the
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* internal device.
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*/
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#define UI_DEV_SETUP _IOW(UINPUT_IOCTL_BASE, 3, struct uinput_setup)
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struct uinput_abs_setup {
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__u16 code; /* axis code */
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/* __u16 filler; */
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struct input_absinfo absinfo;
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};
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/**
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* UI_ABS_SETUP - Set absolute axis information for the device to setup
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*
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* This ioctl sets one absolute axis information for the input device to be
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* created. It supersedes the old "struct uinput_user_dev" method, which wrote
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* part of this data and the content of UI_DEV_SETUP via write().
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*
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* The ioctl takes a "struct uinput_abs_setup" object as argument. The fields
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* of this object are as follows:
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* code: The corresponding input code associated with this axis
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* (ABS_X, ABS_Y, etc...)
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* absinfo: See "struct input_absinfo" for a description of this field.
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* This field is copied unchanged into the kernel for the
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* specified axis. If the axis is not enabled via
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* UI_SET_ABSBIT, this ioctl will enable it.
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*
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* This ioctl can be called multiple times and will overwrite previous values.
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* If this ioctl fails with -EINVAL, it is recommended to use the old
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* "uinput_user_dev" method via write() as a fallback, in case you run on an
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* old kernel that does not support this ioctl.
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*
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* This ioctl may fail with -EINVAL if it is not supported or if you passed
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* incorrect values, -ENOMEM if the kernel runs out of memory or -EFAULT if the
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* passed uinput_setup object cannot be read/written.
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* If this call fails, partial data may have already been applied to the
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* internal device.
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*/
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#define UI_ABS_SETUP _IOW(UINPUT_IOCTL_BASE, 4, struct uinput_abs_setup)
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#define UI_SET_EVBIT _IOW(UINPUT_IOCTL_BASE, 100, int)
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#define UI_SET_KEYBIT _IOW(UINPUT_IOCTL_BASE, 101, int)
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#define UI_SET_RELBIT _IOW(UINPUT_IOCTL_BASE, 102, int)
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#define UI_SET_ABSBIT _IOW(UINPUT_IOCTL_BASE, 103, int)
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#define UI_SET_MSCBIT _IOW(UINPUT_IOCTL_BASE, 104, int)
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#define UI_SET_LEDBIT _IOW(UINPUT_IOCTL_BASE, 105, int)
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#define UI_SET_SNDBIT _IOW(UINPUT_IOCTL_BASE, 106, int)
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#define UI_SET_FFBIT _IOW(UINPUT_IOCTL_BASE, 107, int)
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#define UI_SET_PHYS _IOW(UINPUT_IOCTL_BASE, 108, char*)
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#define UI_SET_SWBIT _IOW(UINPUT_IOCTL_BASE, 109, int)
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#define UI_SET_PROPBIT _IOW(UINPUT_IOCTL_BASE, 110, int)
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#define UI_BEGIN_FF_UPLOAD _IOWR(UINPUT_IOCTL_BASE, 200, struct uinput_ff_upload)
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#define UI_END_FF_UPLOAD _IOW(UINPUT_IOCTL_BASE, 201, struct uinput_ff_upload)
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#define UI_BEGIN_FF_ERASE _IOWR(UINPUT_IOCTL_BASE, 202, struct uinput_ff_erase)
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#define UI_END_FF_ERASE _IOW(UINPUT_IOCTL_BASE, 203, struct uinput_ff_erase)
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/**
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* UI_GET_SYSNAME - get the sysfs name of the created uinput device
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*
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* @return the sysfs name of the created virtual input device.
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* The complete sysfs path is then /sys/devices/virtual/input/--NAME--
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* Usually, it is in the form "inputN"
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*/
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#define UI_GET_SYSNAME(len) _IOC(_IOC_READ, UINPUT_IOCTL_BASE, 44, len)
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/**
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* UI_GET_VERSION - Return version of uinput protocol
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*
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* This writes uinput protocol version implemented by the kernel into
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* the integer pointed to by the ioctl argument. The protocol version
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* is hard-coded in the kernel and is independent of the uinput device.
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*/
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#define UI_GET_VERSION _IOR(UINPUT_IOCTL_BASE, 45, unsigned int)
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/*
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* To write a force-feedback-capable driver, the upload_effect
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* and erase_effect callbacks in input_dev must be implemented.
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* The uinput driver will generate a fake input event when one of
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* these callbacks are invoked. The userspace code then uses
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* ioctls to retrieve additional parameters and send the return code.
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* The callback blocks until this return code is sent.
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*
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* The described callback mechanism is only used if ff_effects_max
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* is set.
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*
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* To implement upload_effect():
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* 1. Wait for an event with type == EV_UINPUT and code == UI_FF_UPLOAD.
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* A request ID will be given in 'value'.
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* 2. Allocate a uinput_ff_upload struct, fill in request_id with
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* the 'value' from the EV_UINPUT event.
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* 3. Issue a UI_BEGIN_FF_UPLOAD ioctl, giving it the
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* uinput_ff_upload struct. It will be filled in with the
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* ff_effects passed to upload_effect().
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* 4. Perform the effect upload, and place a return code back into
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the uinput_ff_upload struct.
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* 5. Issue a UI_END_FF_UPLOAD ioctl, also giving it the
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* uinput_ff_upload_effect struct. This will complete execution
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* of our upload_effect() handler.
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*
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* To implement erase_effect():
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* 1. Wait for an event with type == EV_UINPUT and code == UI_FF_ERASE.
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* A request ID will be given in 'value'.
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* 2. Allocate a uinput_ff_erase struct, fill in request_id with
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* the 'value' from the EV_UINPUT event.
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* 3. Issue a UI_BEGIN_FF_ERASE ioctl, giving it the
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* uinput_ff_erase struct. It will be filled in with the
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* effect ID passed to erase_effect().
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* 4. Perform the effect erasure, and place a return code back
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* into the uinput_ff_erase struct.
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* 5. Issue a UI_END_FF_ERASE ioctl, also giving it the
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* uinput_ff_erase_effect struct. This will complete execution
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* of our erase_effect() handler.
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*/
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/*
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* This is the new event type, used only by uinput.
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* 'code' is UI_FF_UPLOAD or UI_FF_ERASE, and 'value'
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* is the unique request ID. This number was picked
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* arbitrarily, above EV_MAX (since the input system
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* never sees it) but in the range of a 16-bit int.
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*/
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#define EV_UINPUT 0x0101
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#define UI_FF_UPLOAD 1
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#define UI_FF_ERASE 2
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struct uinput_user_dev {
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char name[UINPUT_MAX_NAME_SIZE];
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struct input_id id;
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__u32 ff_effects_max;
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__s32 absmax[ABS_CNT];
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__s32 absmin[ABS_CNT];
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__s32 absfuzz[ABS_CNT];
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__s32 absflat[ABS_CNT];
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};
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#endif /* _UAPI__UINPUT_H_ */
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