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Diffstat (limited to 'include/linux/uinput.h')
| -rw-r--r-- | include/linux/uinput.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/include/linux/uinput.h b/include/linux/uinput.h new file mode 100644 index 000000000000..4c2c82336d10 --- /dev/null +++ b/include/linux/uinput.h @@ -0,0 +1,167 @@ +#ifndef __UINPUT_H_ +#define __UINPUT_H_ +/* + * 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: + * 0.2 16/10/2004 (Micah Dowty <micah@navi.cx>) + * - added force feedback support + * - added UI_SET_PHYS + * 0.1 20/06/2002 + * - first public version + */ +#ifdef __KERNEL__ +#define UINPUT_MINOR 223 +#define UINPUT_NAME "uinput" +#define UINPUT_BUFFER_SIZE 16 +#define UINPUT_NUM_REQUESTS 16 + +/* state flags => bit index for {set|clear|test}_bit ops */ +#define UIST_CREATED 0 + +struct uinput_request { + int id; + int code; /* UI_FF_UPLOAD, UI_FF_ERASE */ + + int retval; + wait_queue_head_t waitq; + int completed; + + union { + int effect_id; + struct ff_effect* effect; + } u; +}; + +struct uinput_device { + struct input_dev *dev; + unsigned long state; + wait_queue_head_t waitq; + unsigned char ready, + head, + tail; + struct input_event buff[UINPUT_BUFFER_SIZE]; + + struct uinput_request *requests[UINPUT_NUM_REQUESTS]; + wait_queue_head_t requests_waitq; + struct semaphore requests_sem; +}; +#endif /* __KERNEL__ */ + +struct uinput_ff_upload { + int request_id; + int retval; + struct ff_effect effect; +}; + +struct uinput_ff_erase { + int request_id; + int retval; + int 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_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 EV_FF is set. + * Otherwise, default implementations of upload_effect and erase_effect + * are used. + * + * 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_effect passed to upload_effect(). + * 4. Perform the effect upload, and place the modified ff_effect + * and 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. + * and 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 + +#ifndef NBITS +#define NBITS(x) ((((x)-1)/(sizeof(long)*8))+1) +#endif /* NBITS */ + +#define UINPUT_MAX_NAME_SIZE 80 +struct uinput_user_dev { + char name[UINPUT_MAX_NAME_SIZE]; + struct input_id id; + int ff_effects_max; + int absmax[ABS_MAX + 1]; + int absmin[ABS_MAX + 1]; + int absfuzz[ABS_MAX + 1]; + int absflat[ABS_MAX + 1]; +}; +#endif /* __UINPUT_H_ */ + |