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/* * User level driver support for input subsystem * * Heavily based on evdev.c by Vojtech Pavlik * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org> * * Changes/Revisions: * 0.3 24/05/2006 (Anssi Hannula <anssi.hannulagmail.com>) * - update ff support for the changes in kernel interface * - add UINPUT_VERSION * 0.2 16/10/2004 (Micah Dowty <micah@navi.cx>) * - added force feedback support * - added UI_SET_PHYS * 0.1 20/06/2002 * - first public version */ #ifndef __UINPUT_H_ #define __UINPUT_H_ #include <linux/types.h> #include <linux/input.h> #define UINPUT_VERSION 3 struct uinput_ff_upload { __u32 request_id; __s32 retval; struct ff_effect effect; struct ff_effect old; }; struct uinput_ff_erase { __u32 request_id; __s32 retval; __u32 effect_id; }; /* ioctl */ #define UINPUT_IOCTL_BASE 'U' #define UI_DEV_CREATE _IO(UINPUT_IOCTL_BASE, 1) #define UI_DEV_DESTROY _IO(UINPUT_IOCTL_BASE, 2) #define UI_SET_EVBIT _IOW(UINPUT_IOCTL_BASE, 100, int) #define UI_SET_KEYBIT _IOW(UINPUT_IOCTL_BASE, 101, int) #define UI_SET_RELBIT _IOW(UINPUT_IOCTL_BASE, 102, int) #define UI_SET_ABSBIT _IOW(UINPUT_IOCTL_BASE, 103, int) #define UI_SET_MSCBIT _IOW(UINPUT_IOCTL_BASE, 104, int) #define UI_SET_LEDBIT _IOW(UINPUT_IOCTL_BASE, 105, int) #define UI_SET_SNDBIT _IOW(UINPUT_IOCTL_BASE, 106, int) #define UI_SET_FFBIT _IOW(UINPUT_IOCTL_BASE, 107, int) #define UI_SET_PHYS _IOW(UINPUT_IOCTL_BASE, 108, char*) #define UI_SET_SWBIT _IOW(UINPUT_IOCTL_BASE, 109, int) #define UI_SET_PROPBIT _IOW(UINPUT_IOCTL_BASE, 110, int) #define UI_BEGIN_FF_UPLOAD _IOWR(UINPUT_IOCTL_BASE, 200, struct uinput_ff_upload) #define UI_END_FF_UPLOAD _IOW(UINPUT_IOCTL_BASE, 201, struct uinput_ff_upload) #define UI_BEGIN_FF_ERASE _IOWR(UINPUT_IOCTL_BASE, 202, struct uinput_ff_erase) #define UI_END_FF_ERASE _IOW(UINPUT_IOCTL_BASE, 203, struct uinput_ff_erase) /* * To write a force-feedback-capable driver, the upload_effect * and erase_effect callbacks in input_dev must be implemented. * The uinput driver will generate a fake input event when one of * these callbacks are invoked. The userspace code then uses * ioctls to retrieve additional parameters and send the return code. * The callback blocks until this return code is sent. * * The described callback mechanism is only used if ff_effects_max * is set. * * To implement upload_effect(): * 1. Wait for an event with type == EV_UINPUT and code == UI_FF_UPLOAD. * A request ID will be given in 'value'. * 2. Allocate a uinput_ff_upload struct, fill in request_id with * the 'value' from the EV_UINPUT event. * 3. Issue a UI_BEGIN_FF_UPLOAD ioctl, giving it the * uinput_ff_upload struct. It will be filled in with the * ff_effects passed to upload_effect(). * 4. Perform the effect upload, and place a return code back into the uinput_ff_upload struct. * 5. Issue a UI_END_FF_UPLOAD ioctl, also giving it the * uinput_ff_upload_effect struct. This will complete execution * of our upload_effect() handler. * * To implement erase_effect(): * 1. Wait for an event with type == EV_UINPUT and code == UI_FF_ERASE. * A request ID will be given in 'value'. * 2. Allocate a uinput_ff_erase struct, fill in request_id with * the 'value' from the EV_UINPUT event. * 3. Issue a UI_BEGIN_FF_ERASE ioctl, giving it the * uinput_ff_erase struct. It will be filled in with the * effect ID passed to erase_effect(). * 4. Perform the effect erasure, and place a return code back * into the uinput_ff_erase struct. * 5. Issue a UI_END_FF_ERASE ioctl, also giving it the * uinput_ff_erase_effect struct. This will complete execution * of our erase_effect() handler. */ /* * This is the new event type, used only by uinput. * 'code' is UI_FF_UPLOAD or UI_FF_ERASE, and 'value' * is the unique request ID. This number was picked * arbitrarily, above EV_MAX (since the input system * never sees it) but in the range of a 16-bit int. */ #define EV_UINPUT 0x0101 #define UI_FF_UPLOAD 1 #define UI_FF_ERASE 2 #define UINPUT_MAX_NAME_SIZE 80 struct uinput_user_dev { char name[UINPUT_MAX_NAME_SIZE]; struct input_id id; __u32 ff_effects_max; __s32 absmax[ABS_CNT]; __s32 absmin[ABS_CNT]; __s32 absfuzz[ABS_CNT]; __s32 absflat[ABS_CNT]; }; #endif /* __UINPUT_H_ */