11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * User level driver support for input subsystem 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Heavily based on evdev.c by Vojtech Pavlik 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 71da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 81da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 91da177e4SLinus Torvalds * (at your option) any later version. 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 121da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 131da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 141da177e4SLinus Torvalds * GNU General Public License for more details. 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 171da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 181da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 191da177e4SLinus Torvalds * 201da177e4SLinus Torvalds * Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org> 211da177e4SLinus Torvalds * 221da177e4SLinus Torvalds * Changes/Revisions: 23ff462551SAnssi Hannula * 0.3 09/04/2006 (Anssi Hannula <anssi.hannula@gmail.com>) 24ff462551SAnssi Hannula * - updated ff support for the changes in kernel interface 25ff462551SAnssi Hannula * - added MODULE_VERSION 261da177e4SLinus Torvalds * 0.2 16/10/2004 (Micah Dowty <micah@navi.cx>) 271da177e4SLinus Torvalds * - added force feedback support 281da177e4SLinus Torvalds * - added UI_SET_PHYS 291da177e4SLinus Torvalds * 0.1 20/06/2002 301da177e4SLinus Torvalds * - first public version 311da177e4SLinus Torvalds */ 321da177e4SLinus Torvalds #include <linux/poll.h> 33a99bbaf5SAlexey Dobriyan #include <linux/sched.h> 341da177e4SLinus Torvalds #include <linux/slab.h> 351da177e4SLinus Torvalds #include <linux/module.h> 361da177e4SLinus Torvalds #include <linux/init.h> 371da177e4SLinus Torvalds #include <linux/fs.h> 381da177e4SLinus Torvalds #include <linux/miscdevice.h> 391da177e4SLinus Torvalds #include <linux/uinput.h> 402d56f3a3SPhilip Langdale #include "../input-compat.h" 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 431da177e4SLinus Torvalds { 44373f9713SDmitry Torokhov struct uinput_device *udev = input_get_drvdata(dev); 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds udev->buff[udev->head].type = type; 471da177e4SLinus Torvalds udev->buff[udev->head].code = code; 481da177e4SLinus Torvalds udev->buff[udev->head].value = value; 491da177e4SLinus Torvalds do_gettimeofday(&udev->buff[udev->head].time); 501da177e4SLinus Torvalds udev->head = (udev->head + 1) % UINPUT_BUFFER_SIZE; 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds wake_up_interruptible(&udev->waitq); 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds return 0; 551da177e4SLinus Torvalds } 561da177e4SLinus Torvalds 5705cebd38SAristeu Sergio Rozanski Filho /* Atomically allocate an ID for the given request. Returns 0 on success. */ 580048e603SDmitry Torokhov static int uinput_request_alloc_id(struct uinput_device *udev, struct uinput_request *request) 591da177e4SLinus Torvalds { 601da177e4SLinus Torvalds int id; 61152c12f5SDmitry Torokhov int err = -1; 621da177e4SLinus Torvalds 630048e603SDmitry Torokhov spin_lock(&udev->requests_lock); 64152c12f5SDmitry Torokhov 6505cebd38SAristeu Sergio Rozanski Filho for (id = 0; id < UINPUT_NUM_REQUESTS; id++) { 661da177e4SLinus Torvalds if (!udev->requests[id]) { 671da177e4SLinus Torvalds request->id = id; 680048e603SDmitry Torokhov udev->requests[id] = request; 69152c12f5SDmitry Torokhov err = 0; 70152c12f5SDmitry Torokhov break; 711da177e4SLinus Torvalds } 7205cebd38SAristeu Sergio Rozanski Filho } 73152c12f5SDmitry Torokhov 740048e603SDmitry Torokhov spin_unlock(&udev->requests_lock); 75152c12f5SDmitry Torokhov return err; 761da177e4SLinus Torvalds } 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds static struct uinput_request *uinput_request_find(struct uinput_device *udev, int id) 791da177e4SLinus Torvalds { 801da177e4SLinus Torvalds /* Find an input request, by ID. Returns NULL if the ID isn't valid. */ 811da177e4SLinus Torvalds if (id >= UINPUT_NUM_REQUESTS || id < 0) 821da177e4SLinus Torvalds return NULL; 832d56f3a3SPhilip Langdale 841da177e4SLinus Torvalds return udev->requests[id]; 851da177e4SLinus Torvalds } 861da177e4SLinus Torvalds 870048e603SDmitry Torokhov static inline int uinput_request_reserve_slot(struct uinput_device *udev, struct uinput_request *request) 881da177e4SLinus Torvalds { 890048e603SDmitry Torokhov /* Allocate slot. If none are available right away, wait. */ 900048e603SDmitry Torokhov return wait_event_interruptible(udev->requests_waitq, 910048e603SDmitry Torokhov !uinput_request_alloc_id(udev, request)); 921da177e4SLinus Torvalds } 931da177e4SLinus Torvalds 940048e603SDmitry Torokhov static void uinput_request_done(struct uinput_device *udev, struct uinput_request *request) 951da177e4SLinus Torvalds { 960048e603SDmitry Torokhov /* Mark slot as available */ 970048e603SDmitry Torokhov udev->requests[request->id] = NULL; 98e597f0c8SDmitry Torokhov wake_up(&udev->requests_waitq); 99e7507ed9SDmitry Torokhov 100e7507ed9SDmitry Torokhov complete(&request->done); 1010048e603SDmitry Torokhov } 1020048e603SDmitry Torokhov 10305cebd38SAristeu Sergio Rozanski Filho static int uinput_request_submit(struct uinput_device *udev, struct uinput_request *request) 1040048e603SDmitry Torokhov { 10505cebd38SAristeu Sergio Rozanski Filho int retval; 1061da177e4SLinus Torvalds 10705cebd38SAristeu Sergio Rozanski Filho retval = uinput_request_reserve_slot(udev, request); 10805cebd38SAristeu Sergio Rozanski Filho if (retval) 10905cebd38SAristeu Sergio Rozanski Filho return retval; 11005cebd38SAristeu Sergio Rozanski Filho 11105cebd38SAristeu Sergio Rozanski Filho retval = mutex_lock_interruptible(&udev->mutex); 11205cebd38SAristeu Sergio Rozanski Filho if (retval) 11305cebd38SAristeu Sergio Rozanski Filho return retval; 11405cebd38SAristeu Sergio Rozanski Filho 11505cebd38SAristeu Sergio Rozanski Filho if (udev->state != UIST_CREATED) { 11605cebd38SAristeu Sergio Rozanski Filho retval = -ENODEV; 11705cebd38SAristeu Sergio Rozanski Filho goto out; 11805cebd38SAristeu Sergio Rozanski Filho } 11905cebd38SAristeu Sergio Rozanski Filho 12005cebd38SAristeu Sergio Rozanski Filho /* Tell our userspace app about this new request by queueing an input event */ 12105cebd38SAristeu Sergio Rozanski Filho uinput_dev_event(udev->dev, EV_UINPUT, request->code, request->id); 12205cebd38SAristeu Sergio Rozanski Filho 12305cebd38SAristeu Sergio Rozanski Filho out: 12405cebd38SAristeu Sergio Rozanski Filho mutex_unlock(&udev->mutex); 12505cebd38SAristeu Sergio Rozanski Filho return retval; 12605cebd38SAristeu Sergio Rozanski Filho } 12705cebd38SAristeu Sergio Rozanski Filho 12805cebd38SAristeu Sergio Rozanski Filho /* 12905cebd38SAristeu Sergio Rozanski Filho * Fail all ouitstanding requests so handlers don't wait for the userspace 13005cebd38SAristeu Sergio Rozanski Filho * to finish processing them. 13105cebd38SAristeu Sergio Rozanski Filho */ 13205cebd38SAristeu Sergio Rozanski Filho static void uinput_flush_requests(struct uinput_device *udev) 13305cebd38SAristeu Sergio Rozanski Filho { 13405cebd38SAristeu Sergio Rozanski Filho struct uinput_request *request; 13505cebd38SAristeu Sergio Rozanski Filho int i; 13605cebd38SAristeu Sergio Rozanski Filho 13705cebd38SAristeu Sergio Rozanski Filho spin_lock(&udev->requests_lock); 13805cebd38SAristeu Sergio Rozanski Filho 13905cebd38SAristeu Sergio Rozanski Filho for (i = 0; i < UINPUT_NUM_REQUESTS; i++) { 14005cebd38SAristeu Sergio Rozanski Filho request = udev->requests[i]; 14105cebd38SAristeu Sergio Rozanski Filho if (request) { 14205cebd38SAristeu Sergio Rozanski Filho request->retval = -ENODEV; 14305cebd38SAristeu Sergio Rozanski Filho uinput_request_done(udev, request); 14405cebd38SAristeu Sergio Rozanski Filho } 14505cebd38SAristeu Sergio Rozanski Filho } 14605cebd38SAristeu Sergio Rozanski Filho 14705cebd38SAristeu Sergio Rozanski Filho spin_unlock(&udev->requests_lock); 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 150ff462551SAnssi Hannula static void uinput_dev_set_gain(struct input_dev *dev, u16 gain) 151ff462551SAnssi Hannula { 152ff462551SAnssi Hannula uinput_dev_event(dev, EV_FF, FF_GAIN, gain); 153ff462551SAnssi Hannula } 154ff462551SAnssi Hannula 155ff462551SAnssi Hannula static void uinput_dev_set_autocenter(struct input_dev *dev, u16 magnitude) 156ff462551SAnssi Hannula { 157ff462551SAnssi Hannula uinput_dev_event(dev, EV_FF, FF_AUTOCENTER, magnitude); 158ff462551SAnssi Hannula } 159ff462551SAnssi Hannula 160ff462551SAnssi Hannula static int uinput_dev_playback(struct input_dev *dev, int effect_id, int value) 161ff462551SAnssi Hannula { 162ff462551SAnssi Hannula return uinput_dev_event(dev, EV_FF, effect_id, value); 163ff462551SAnssi Hannula } 164ff462551SAnssi Hannula 165ff462551SAnssi Hannula static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old) 1661da177e4SLinus Torvalds { 16705cebd38SAristeu Sergio Rozanski Filho struct uinput_device *udev = input_get_drvdata(dev); 1681da177e4SLinus Torvalds struct uinput_request request; 1690048e603SDmitry Torokhov int retval; 1701da177e4SLinus Torvalds 1712d56f3a3SPhilip Langdale /* 1722d56f3a3SPhilip Langdale * uinput driver does not currently support periodic effects with 1732d56f3a3SPhilip Langdale * custom waveform since it does not have a way to pass buffer of 1742d56f3a3SPhilip Langdale * samples (custom_data) to userspace. If ever there is a device 1752d56f3a3SPhilip Langdale * supporting custom waveforms we would need to define an additional 1762d56f3a3SPhilip Langdale * ioctl (UI_UPLOAD_SAMPLES) but for now we just bail out. 1772d56f3a3SPhilip Langdale */ 1782d56f3a3SPhilip Langdale if (effect->type == FF_PERIODIC && 1792d56f3a3SPhilip Langdale effect->u.periodic.waveform == FF_CUSTOM) 1802d56f3a3SPhilip Langdale return -EINVAL; 1812d56f3a3SPhilip Langdale 1820048e603SDmitry Torokhov request.id = -1; 1830048e603SDmitry Torokhov init_completion(&request.done); 1840048e603SDmitry Torokhov request.code = UI_FF_UPLOAD; 185ff462551SAnssi Hannula request.u.upload.effect = effect; 186ff462551SAnssi Hannula request.u.upload.old = old; 1870048e603SDmitry Torokhov 18805cebd38SAristeu Sergio Rozanski Filho retval = uinput_request_submit(udev, &request); 18905cebd38SAristeu Sergio Rozanski Filho if (!retval) { 19005cebd38SAristeu Sergio Rozanski Filho wait_for_completion(&request.done); 19105cebd38SAristeu Sergio Rozanski Filho retval = request.retval; 19205cebd38SAristeu Sergio Rozanski Filho } 1930048e603SDmitry Torokhov 1940048e603SDmitry Torokhov return retval; 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id) 1981da177e4SLinus Torvalds { 19905cebd38SAristeu Sergio Rozanski Filho struct uinput_device *udev = input_get_drvdata(dev); 2001da177e4SLinus Torvalds struct uinput_request request; 2010048e603SDmitry Torokhov int retval; 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds if (!test_bit(EV_FF, dev->evbit)) 2041da177e4SLinus Torvalds return -ENOSYS; 2051da177e4SLinus Torvalds 2060048e603SDmitry Torokhov request.id = -1; 2070048e603SDmitry Torokhov init_completion(&request.done); 2080048e603SDmitry Torokhov request.code = UI_FF_ERASE; 2091da177e4SLinus Torvalds request.u.effect_id = effect_id; 2100048e603SDmitry Torokhov 21105cebd38SAristeu Sergio Rozanski Filho retval = uinput_request_submit(udev, &request); 21205cebd38SAristeu Sergio Rozanski Filho if (!retval) { 21305cebd38SAristeu Sergio Rozanski Filho wait_for_completion(&request.done); 21405cebd38SAristeu Sergio Rozanski Filho retval = request.retval; 21505cebd38SAristeu Sergio Rozanski Filho } 2160048e603SDmitry Torokhov 2170048e603SDmitry Torokhov return retval; 2181da177e4SLinus Torvalds } 2191da177e4SLinus Torvalds 22029506415SDmitry Torokhov static void uinput_destroy_device(struct uinput_device *udev) 22129506415SDmitry Torokhov { 22229506415SDmitry Torokhov const char *name, *phys; 22305cebd38SAristeu Sergio Rozanski Filho struct input_dev *dev = udev->dev; 22405cebd38SAristeu Sergio Rozanski Filho enum uinput_state old_state = udev->state; 22529506415SDmitry Torokhov 22605cebd38SAristeu Sergio Rozanski Filho udev->state = UIST_NEW_DEVICE; 22705cebd38SAristeu Sergio Rozanski Filho 22805cebd38SAristeu Sergio Rozanski Filho if (dev) { 22905cebd38SAristeu Sergio Rozanski Filho name = dev->name; 23005cebd38SAristeu Sergio Rozanski Filho phys = dev->phys; 23105cebd38SAristeu Sergio Rozanski Filho if (old_state == UIST_CREATED) { 23205cebd38SAristeu Sergio Rozanski Filho uinput_flush_requests(udev); 23305cebd38SAristeu Sergio Rozanski Filho input_unregister_device(dev); 23405cebd38SAristeu Sergio Rozanski Filho } else { 23505cebd38SAristeu Sergio Rozanski Filho input_free_device(dev); 23605cebd38SAristeu Sergio Rozanski Filho } 23729506415SDmitry Torokhov kfree(name); 23829506415SDmitry Torokhov kfree(phys); 23929506415SDmitry Torokhov udev->dev = NULL; 24029506415SDmitry Torokhov } 24129506415SDmitry Torokhov } 24229506415SDmitry Torokhov 2431da177e4SLinus Torvalds static int uinput_create_device(struct uinput_device *udev) 2441da177e4SLinus Torvalds { 245ff462551SAnssi Hannula struct input_dev *dev = udev->dev; 24629506415SDmitry Torokhov int error; 24729506415SDmitry Torokhov 24829506415SDmitry Torokhov if (udev->state != UIST_SETUP_COMPLETE) { 2491da177e4SLinus Torvalds printk(KERN_DEBUG "%s: write device info first\n", UINPUT_NAME); 2501da177e4SLinus Torvalds return -EINVAL; 2511da177e4SLinus Torvalds } 2521da177e4SLinus Torvalds 253ff462551SAnssi Hannula if (udev->ff_effects_max) { 254ff462551SAnssi Hannula error = input_ff_create(dev, udev->ff_effects_max); 255ff462551SAnssi Hannula if (error) 256ff462551SAnssi Hannula goto fail1; 257ff462551SAnssi Hannula 258ff462551SAnssi Hannula dev->ff->upload = uinput_dev_upload_effect; 259ff462551SAnssi Hannula dev->ff->erase = uinput_dev_erase_effect; 260ff462551SAnssi Hannula dev->ff->playback = uinput_dev_playback; 261ff462551SAnssi Hannula dev->ff->set_gain = uinput_dev_set_gain; 262ff462551SAnssi Hannula dev->ff->set_autocenter = uinput_dev_set_autocenter; 2631da177e4SLinus Torvalds } 2641da177e4SLinus Torvalds 265ff462551SAnssi Hannula error = input_register_device(udev->dev); 266ff462551SAnssi Hannula if (error) 267ff462551SAnssi Hannula goto fail2; 268ff462551SAnssi Hannula 26929506415SDmitry Torokhov udev->state = UIST_CREATED; 2701da177e4SLinus Torvalds 2711da177e4SLinus Torvalds return 0; 272ff462551SAnssi Hannula 273ff462551SAnssi Hannula fail2: input_ff_destroy(dev); 274ff462551SAnssi Hannula fail1: uinput_destroy_device(udev); 275ff462551SAnssi Hannula return error; 2761da177e4SLinus Torvalds } 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds static int uinput_open(struct inode *inode, struct file *file) 2791da177e4SLinus Torvalds { 2801da177e4SLinus Torvalds struct uinput_device *newdev; 2811da177e4SLinus Torvalds 28229506415SDmitry Torokhov newdev = kzalloc(sizeof(struct uinput_device), GFP_KERNEL); 2831da177e4SLinus Torvalds if (!newdev) 28429506415SDmitry Torokhov return -ENOMEM; 28529506415SDmitry Torokhov 286221979aaSDmitry Torokhov mutex_init(&newdev->mutex); 2870048e603SDmitry Torokhov spin_lock_init(&newdev->requests_lock); 2881da177e4SLinus Torvalds init_waitqueue_head(&newdev->requests_waitq); 28929506415SDmitry Torokhov init_waitqueue_head(&newdev->waitq); 29029506415SDmitry Torokhov newdev->state = UIST_NEW_DEVICE; 2911da177e4SLinus Torvalds 2921da177e4SLinus Torvalds file->private_data = newdev; 293daf8a96bSDmitry Torokhov nonseekable_open(inode, file); 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds return 0; 2961da177e4SLinus Torvalds } 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds static int uinput_validate_absbits(struct input_dev *dev) 2991da177e4SLinus Torvalds { 3001da177e4SLinus Torvalds unsigned int cnt; 3011da177e4SLinus Torvalds int retval = 0; 3021da177e4SLinus Torvalds 30381c2a3baSDaniel Mack for (cnt = 0; cnt < ABS_CNT; cnt++) { 3041da177e4SLinus Torvalds if (!test_bit(cnt, dev->absbit)) 3051da177e4SLinus Torvalds continue; 3061da177e4SLinus Torvalds 307987a6c02SDaniel Mack if (input_abs_get_max(dev, cnt) <= input_abs_get_min(dev, cnt)) { 3081da177e4SLinus Torvalds printk(KERN_DEBUG 3091da177e4SLinus Torvalds "%s: invalid abs[%02x] min:%d max:%d\n", 3101da177e4SLinus Torvalds UINPUT_NAME, cnt, 311987a6c02SDaniel Mack input_abs_get_min(dev, cnt), 312987a6c02SDaniel Mack input_abs_get_max(dev, cnt)); 3131da177e4SLinus Torvalds retval = -EINVAL; 3141da177e4SLinus Torvalds break; 3151da177e4SLinus Torvalds } 3161da177e4SLinus Torvalds 317987a6c02SDaniel Mack if (input_abs_get_flat(dev, cnt) > 318987a6c02SDaniel Mack input_abs_get_max(dev, cnt) - input_abs_get_min(dev, cnt)) { 3191da177e4SLinus Torvalds printk(KERN_DEBUG 320987a6c02SDaniel Mack "%s: abs_flat #%02x out of range: %d " 3211da177e4SLinus Torvalds "(min:%d/max:%d)\n", 322987a6c02SDaniel Mack UINPUT_NAME, cnt, 323987a6c02SDaniel Mack input_abs_get_flat(dev, cnt), 324987a6c02SDaniel Mack input_abs_get_min(dev, cnt), 325987a6c02SDaniel Mack input_abs_get_max(dev, cnt)); 3261da177e4SLinus Torvalds retval = -EINVAL; 3271da177e4SLinus Torvalds break; 3281da177e4SLinus Torvalds } 3291da177e4SLinus Torvalds } 3301da177e4SLinus Torvalds return retval; 3311da177e4SLinus Torvalds } 3321da177e4SLinus Torvalds 33329506415SDmitry Torokhov static int uinput_allocate_device(struct uinput_device *udev) 33429506415SDmitry Torokhov { 33529506415SDmitry Torokhov udev->dev = input_allocate_device(); 33629506415SDmitry Torokhov if (!udev->dev) 33729506415SDmitry Torokhov return -ENOMEM; 33829506415SDmitry Torokhov 33929506415SDmitry Torokhov udev->dev->event = uinput_dev_event; 340373f9713SDmitry Torokhov input_set_drvdata(udev->dev, udev); 34129506415SDmitry Torokhov 34229506415SDmitry Torokhov return 0; 34329506415SDmitry Torokhov } 34429506415SDmitry Torokhov 34529506415SDmitry Torokhov static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count) 3461da177e4SLinus Torvalds { 3471da177e4SLinus Torvalds struct uinput_user_dev *user_dev; 3481da177e4SLinus Torvalds struct input_dev *dev; 3495b6271bdSDmitry Torokhov char *name; 350987a6c02SDaniel Mack int i, size; 351152c12f5SDmitry Torokhov int retval; 3521da177e4SLinus Torvalds 35329506415SDmitry Torokhov if (count != sizeof(struct uinput_user_dev)) 35429506415SDmitry Torokhov return -EINVAL; 3551da177e4SLinus Torvalds 35629506415SDmitry Torokhov if (!udev->dev) { 35729506415SDmitry Torokhov retval = uinput_allocate_device(udev); 35829506415SDmitry Torokhov if (retval) 35929506415SDmitry Torokhov return retval; 36029506415SDmitry Torokhov } 36129506415SDmitry Torokhov 3621da177e4SLinus Torvalds dev = udev->dev; 3631da177e4SLinus Torvalds 364152c12f5SDmitry Torokhov user_dev = kmalloc(sizeof(struct uinput_user_dev), GFP_KERNEL); 36529506415SDmitry Torokhov if (!user_dev) 36629506415SDmitry Torokhov return -ENOMEM; 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds if (copy_from_user(user_dev, buffer, sizeof(struct uinput_user_dev))) { 3691da177e4SLinus Torvalds retval = -EFAULT; 3701da177e4SLinus Torvalds goto exit; 3711da177e4SLinus Torvalds } 3721da177e4SLinus Torvalds 373ff462551SAnssi Hannula udev->ff_effects_max = user_dev->ff_effects_max; 374ff462551SAnssi Hannula 3751da177e4SLinus Torvalds size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1; 37629506415SDmitry Torokhov if (!size) { 37729506415SDmitry Torokhov retval = -EINVAL; 37829506415SDmitry Torokhov goto exit; 37929506415SDmitry Torokhov } 38029506415SDmitry Torokhov 38129506415SDmitry Torokhov kfree(dev->name); 3825b6271bdSDmitry Torokhov dev->name = name = kmalloc(size, GFP_KERNEL); 3835b6271bdSDmitry Torokhov if (!name) { 3841da177e4SLinus Torvalds retval = -ENOMEM; 3851da177e4SLinus Torvalds goto exit; 3861da177e4SLinus Torvalds } 3875b6271bdSDmitry Torokhov strlcpy(name, user_dev->name, size); 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds dev->id.bustype = user_dev->id.bustype; 3901da177e4SLinus Torvalds dev->id.vendor = user_dev->id.vendor; 3911da177e4SLinus Torvalds dev->id.product = user_dev->id.product; 3921da177e4SLinus Torvalds dev->id.version = user_dev->id.version; 3931da177e4SLinus Torvalds 394987a6c02SDaniel Mack for (i = 0; i < ABS_CNT; i++) { 395987a6c02SDaniel Mack input_abs_set_max(dev, i, user_dev->absmax[i]); 396987a6c02SDaniel Mack input_abs_set_min(dev, i, user_dev->absmin[i]); 397987a6c02SDaniel Mack input_abs_set_fuzz(dev, i, user_dev->absfuzz[i]); 398987a6c02SDaniel Mack input_abs_set_flat(dev, i, user_dev->absflat[i]); 399987a6c02SDaniel Mack } 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds /* check if absmin/absmax/absfuzz/absflat are filled as 4021da177e4SLinus Torvalds * told in Documentation/input/input-programming.txt */ 4031da177e4SLinus Torvalds if (test_bit(EV_ABS, dev->evbit)) { 40429506415SDmitry Torokhov retval = uinput_validate_absbits(dev); 40529506415SDmitry Torokhov if (retval < 0) 40629506415SDmitry Torokhov goto exit; 4071da177e4SLinus Torvalds } 40829506415SDmitry Torokhov 40929506415SDmitry Torokhov udev->state = UIST_SETUP_COMPLETE; 41029506415SDmitry Torokhov retval = count; 4111da177e4SLinus Torvalds 4121da177e4SLinus Torvalds exit: 4131da177e4SLinus Torvalds kfree(user_dev); 4141da177e4SLinus Torvalds return retval; 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds 41729506415SDmitry Torokhov static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count) 4181da177e4SLinus Torvalds { 4191da177e4SLinus Torvalds struct input_event ev; 4201da177e4SLinus Torvalds 4212d56f3a3SPhilip Langdale if (count < input_event_size()) 42229506415SDmitry Torokhov return -EINVAL; 42329506415SDmitry Torokhov 4242d56f3a3SPhilip Langdale if (input_event_from_user(buffer, &ev)) 4251da177e4SLinus Torvalds return -EFAULT; 4261da177e4SLinus Torvalds 42729506415SDmitry Torokhov input_event(udev->dev, ev.type, ev.code, ev.value); 42829506415SDmitry Torokhov 4292d56f3a3SPhilip Langdale return input_event_size(); 43029506415SDmitry Torokhov } 43129506415SDmitry Torokhov 43229506415SDmitry Torokhov static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) 43329506415SDmitry Torokhov { 43429506415SDmitry Torokhov struct uinput_device *udev = file->private_data; 43529506415SDmitry Torokhov int retval; 43629506415SDmitry Torokhov 437221979aaSDmitry Torokhov retval = mutex_lock_interruptible(&udev->mutex); 43829506415SDmitry Torokhov if (retval) 43929506415SDmitry Torokhov return retval; 44029506415SDmitry Torokhov 44129506415SDmitry Torokhov retval = udev->state == UIST_CREATED ? 44229506415SDmitry Torokhov uinput_inject_event(udev, buffer, count) : 44329506415SDmitry Torokhov uinput_setup_device(udev, buffer, count); 44429506415SDmitry Torokhov 445221979aaSDmitry Torokhov mutex_unlock(&udev->mutex); 44629506415SDmitry Torokhov 44729506415SDmitry Torokhov return retval; 4481da177e4SLinus Torvalds } 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) 4511da177e4SLinus Torvalds { 4521da177e4SLinus Torvalds struct uinput_device *udev = file->private_data; 4531da177e4SLinus Torvalds int retval = 0; 4541da177e4SLinus Torvalds 45529506415SDmitry Torokhov if (udev->state != UIST_CREATED) 4561da177e4SLinus Torvalds return -ENODEV; 4571da177e4SLinus Torvalds 458152c12f5SDmitry Torokhov if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK)) 4591da177e4SLinus Torvalds return -EAGAIN; 4601da177e4SLinus Torvalds 4611da177e4SLinus Torvalds retval = wait_event_interruptible(udev->waitq, 46229506415SDmitry Torokhov udev->head != udev->tail || udev->state != UIST_CREATED); 4631da177e4SLinus Torvalds if (retval) 4641da177e4SLinus Torvalds return retval; 4651da177e4SLinus Torvalds 466221979aaSDmitry Torokhov retval = mutex_lock_interruptible(&udev->mutex); 46729506415SDmitry Torokhov if (retval) 46829506415SDmitry Torokhov return retval; 4691da177e4SLinus Torvalds 47029506415SDmitry Torokhov if (udev->state != UIST_CREATED) { 47129506415SDmitry Torokhov retval = -ENODEV; 47229506415SDmitry Torokhov goto out; 47329506415SDmitry Torokhov } 47429506415SDmitry Torokhov 4752d56f3a3SPhilip Langdale while (udev->head != udev->tail && retval + input_event_size() <= count) { 4762d56f3a3SPhilip Langdale if (input_event_to_user(buffer + retval, &udev->buff[udev->tail])) { 47729506415SDmitry Torokhov retval = -EFAULT; 47829506415SDmitry Torokhov goto out; 47929506415SDmitry Torokhov } 4801da177e4SLinus Torvalds udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE; 4812d56f3a3SPhilip Langdale retval += input_event_size(); 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds 48429506415SDmitry Torokhov out: 485221979aaSDmitry Torokhov mutex_unlock(&udev->mutex); 48629506415SDmitry Torokhov 4871da177e4SLinus Torvalds return retval; 4881da177e4SLinus Torvalds } 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds static unsigned int uinput_poll(struct file *file, poll_table *wait) 4911da177e4SLinus Torvalds { 4921da177e4SLinus Torvalds struct uinput_device *udev = file->private_data; 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds poll_wait(file, &udev->waitq, wait); 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvalds if (udev->head != udev->tail) 4971da177e4SLinus Torvalds return POLLIN | POLLRDNORM; 4981da177e4SLinus Torvalds 4991da177e4SLinus Torvalds return 0; 5001da177e4SLinus Torvalds } 5011da177e4SLinus Torvalds 50229506415SDmitry Torokhov static int uinput_release(struct inode *inode, struct file *file) 5031da177e4SLinus Torvalds { 50429506415SDmitry Torokhov struct uinput_device *udev = file->private_data; 5051da177e4SLinus Torvalds 50629506415SDmitry Torokhov uinput_destroy_device(udev); 5071da177e4SLinus Torvalds kfree(udev); 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds return 0; 5101da177e4SLinus Torvalds } 5111da177e4SLinus Torvalds 5122d56f3a3SPhilip Langdale #ifdef CONFIG_COMPAT 5132d56f3a3SPhilip Langdale struct uinput_ff_upload_compat { 5142d56f3a3SPhilip Langdale int request_id; 5152d56f3a3SPhilip Langdale int retval; 5162d56f3a3SPhilip Langdale struct ff_effect_compat effect; 5172d56f3a3SPhilip Langdale struct ff_effect_compat old; 5182d56f3a3SPhilip Langdale }; 5192d56f3a3SPhilip Langdale 5202d56f3a3SPhilip Langdale static int uinput_ff_upload_to_user(char __user *buffer, 5212d56f3a3SPhilip Langdale const struct uinput_ff_upload *ff_up) 5222d56f3a3SPhilip Langdale { 5232d56f3a3SPhilip Langdale if (INPUT_COMPAT_TEST) { 5242d56f3a3SPhilip Langdale struct uinput_ff_upload_compat ff_up_compat; 5252d56f3a3SPhilip Langdale 5262d56f3a3SPhilip Langdale ff_up_compat.request_id = ff_up->request_id; 5272d56f3a3SPhilip Langdale ff_up_compat.retval = ff_up->retval; 5282d56f3a3SPhilip Langdale /* 5292d56f3a3SPhilip Langdale * It so happens that the pointer that gives us the trouble 5302d56f3a3SPhilip Langdale * is the last field in the structure. Since we don't support 5312d56f3a3SPhilip Langdale * custom waveforms in uinput anyway we can just copy the whole 5322d56f3a3SPhilip Langdale * thing (to the compat size) and ignore the pointer. 5332d56f3a3SPhilip Langdale */ 5342d56f3a3SPhilip Langdale memcpy(&ff_up_compat.effect, &ff_up->effect, 5352d56f3a3SPhilip Langdale sizeof(struct ff_effect_compat)); 5362d56f3a3SPhilip Langdale memcpy(&ff_up_compat.old, &ff_up->old, 5372d56f3a3SPhilip Langdale sizeof(struct ff_effect_compat)); 5382d56f3a3SPhilip Langdale 5392d56f3a3SPhilip Langdale if (copy_to_user(buffer, &ff_up_compat, 5402d56f3a3SPhilip Langdale sizeof(struct uinput_ff_upload_compat))) 5412d56f3a3SPhilip Langdale return -EFAULT; 5422d56f3a3SPhilip Langdale } else { 5432d56f3a3SPhilip Langdale if (copy_to_user(buffer, ff_up, 5442d56f3a3SPhilip Langdale sizeof(struct uinput_ff_upload))) 5452d56f3a3SPhilip Langdale return -EFAULT; 5462d56f3a3SPhilip Langdale } 5472d56f3a3SPhilip Langdale 5482d56f3a3SPhilip Langdale return 0; 5492d56f3a3SPhilip Langdale } 5502d56f3a3SPhilip Langdale 5512d56f3a3SPhilip Langdale static int uinput_ff_upload_from_user(const char __user *buffer, 5522d56f3a3SPhilip Langdale struct uinput_ff_upload *ff_up) 5532d56f3a3SPhilip Langdale { 5542d56f3a3SPhilip Langdale if (INPUT_COMPAT_TEST) { 5552d56f3a3SPhilip Langdale struct uinput_ff_upload_compat ff_up_compat; 5562d56f3a3SPhilip Langdale 5572d56f3a3SPhilip Langdale if (copy_from_user(&ff_up_compat, buffer, 5582d56f3a3SPhilip Langdale sizeof(struct uinput_ff_upload_compat))) 5592d56f3a3SPhilip Langdale return -EFAULT; 5602d56f3a3SPhilip Langdale 5612d56f3a3SPhilip Langdale ff_up->request_id = ff_up_compat.request_id; 5622d56f3a3SPhilip Langdale ff_up->retval = ff_up_compat.retval; 5632d56f3a3SPhilip Langdale memcpy(&ff_up->effect, &ff_up_compat.effect, 5642d56f3a3SPhilip Langdale sizeof(struct ff_effect_compat)); 5652d56f3a3SPhilip Langdale memcpy(&ff_up->old, &ff_up_compat.old, 5662d56f3a3SPhilip Langdale sizeof(struct ff_effect_compat)); 5672d56f3a3SPhilip Langdale 5682d56f3a3SPhilip Langdale } else { 5692d56f3a3SPhilip Langdale if (copy_from_user(ff_up, buffer, 5702d56f3a3SPhilip Langdale sizeof(struct uinput_ff_upload))) 5712d56f3a3SPhilip Langdale return -EFAULT; 5722d56f3a3SPhilip Langdale } 5732d56f3a3SPhilip Langdale 5742d56f3a3SPhilip Langdale return 0; 5752d56f3a3SPhilip Langdale } 5762d56f3a3SPhilip Langdale 5772d56f3a3SPhilip Langdale #else 5782d56f3a3SPhilip Langdale 5792d56f3a3SPhilip Langdale static int uinput_ff_upload_to_user(char __user *buffer, 5802d56f3a3SPhilip Langdale const struct uinput_ff_upload *ff_up) 5812d56f3a3SPhilip Langdale { 5822d56f3a3SPhilip Langdale if (copy_to_user(buffer, ff_up, sizeof(struct uinput_ff_upload))) 5832d56f3a3SPhilip Langdale return -EFAULT; 5842d56f3a3SPhilip Langdale 5852d56f3a3SPhilip Langdale return 0; 5862d56f3a3SPhilip Langdale } 5872d56f3a3SPhilip Langdale 5882d56f3a3SPhilip Langdale static int uinput_ff_upload_from_user(const char __user *buffer, 5892d56f3a3SPhilip Langdale struct uinput_ff_upload *ff_up) 5902d56f3a3SPhilip Langdale { 5912d56f3a3SPhilip Langdale if (copy_from_user(ff_up, buffer, sizeof(struct uinput_ff_upload))) 5922d56f3a3SPhilip Langdale return -EFAULT; 5932d56f3a3SPhilip Langdale 5942d56f3a3SPhilip Langdale return 0; 5952d56f3a3SPhilip Langdale } 5962d56f3a3SPhilip Langdale 5972d56f3a3SPhilip Langdale #endif 5982d56f3a3SPhilip Langdale 59929506415SDmitry Torokhov #define uinput_set_bit(_arg, _bit, _max) \ 60029506415SDmitry Torokhov ({ \ 60129506415SDmitry Torokhov int __ret = 0; \ 60229506415SDmitry Torokhov if (udev->state == UIST_CREATED) \ 60329506415SDmitry Torokhov __ret = -EINVAL; \ 60429506415SDmitry Torokhov else if ((_arg) > (_max)) \ 60529506415SDmitry Torokhov __ret = -EINVAL; \ 60629506415SDmitry Torokhov else set_bit((_arg), udev->dev->_bit); \ 60729506415SDmitry Torokhov __ret; \ 60829506415SDmitry Torokhov }) 6091da177e4SLinus Torvalds 6102d56f3a3SPhilip Langdale static long uinput_ioctl_handler(struct file *file, unsigned int cmd, 6112d56f3a3SPhilip Langdale unsigned long arg, void __user *p) 6121da177e4SLinus Torvalds { 61329506415SDmitry Torokhov int retval; 6142d56f3a3SPhilip Langdale struct uinput_device *udev = file->private_data; 6151da177e4SLinus Torvalds struct uinput_ff_upload ff_up; 6161da177e4SLinus Torvalds struct uinput_ff_erase ff_erase; 6171da177e4SLinus Torvalds struct uinput_request *req; 6181da177e4SLinus Torvalds int length; 6195b6271bdSDmitry Torokhov char *phys; 6201da177e4SLinus Torvalds 621221979aaSDmitry Torokhov retval = mutex_lock_interruptible(&udev->mutex); 62229506415SDmitry Torokhov if (retval) 62329506415SDmitry Torokhov return retval; 62429506415SDmitry Torokhov 62529506415SDmitry Torokhov if (!udev->dev) { 62629506415SDmitry Torokhov retval = uinput_allocate_device(udev); 62729506415SDmitry Torokhov if (retval) 62829506415SDmitry Torokhov goto out; 6291da177e4SLinus Torvalds } 6301da177e4SLinus Torvalds 6311da177e4SLinus Torvalds switch (cmd) { 6321da177e4SLinus Torvalds case UI_DEV_CREATE: 6331da177e4SLinus Torvalds retval = uinput_create_device(udev); 6341da177e4SLinus Torvalds break; 6351da177e4SLinus Torvalds 6361da177e4SLinus Torvalds case UI_DEV_DESTROY: 63729506415SDmitry Torokhov uinput_destroy_device(udev); 6381da177e4SLinus Torvalds break; 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds case UI_SET_EVBIT: 64129506415SDmitry Torokhov retval = uinput_set_bit(arg, evbit, EV_MAX); 6421da177e4SLinus Torvalds break; 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds case UI_SET_KEYBIT: 64529506415SDmitry Torokhov retval = uinput_set_bit(arg, keybit, KEY_MAX); 6461da177e4SLinus Torvalds break; 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds case UI_SET_RELBIT: 64929506415SDmitry Torokhov retval = uinput_set_bit(arg, relbit, REL_MAX); 6501da177e4SLinus Torvalds break; 6511da177e4SLinus Torvalds 6521da177e4SLinus Torvalds case UI_SET_ABSBIT: 65329506415SDmitry Torokhov retval = uinput_set_bit(arg, absbit, ABS_MAX); 6541da177e4SLinus Torvalds break; 6551da177e4SLinus Torvalds 6561da177e4SLinus Torvalds case UI_SET_MSCBIT: 65729506415SDmitry Torokhov retval = uinput_set_bit(arg, mscbit, MSC_MAX); 6581da177e4SLinus Torvalds break; 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds case UI_SET_LEDBIT: 66129506415SDmitry Torokhov retval = uinput_set_bit(arg, ledbit, LED_MAX); 6621da177e4SLinus Torvalds break; 6631da177e4SLinus Torvalds 6641da177e4SLinus Torvalds case UI_SET_SNDBIT: 66529506415SDmitry Torokhov retval = uinput_set_bit(arg, sndbit, SND_MAX); 6661da177e4SLinus Torvalds break; 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds case UI_SET_FFBIT: 66929506415SDmitry Torokhov retval = uinput_set_bit(arg, ffbit, FF_MAX); 6701da177e4SLinus Torvalds break; 6711da177e4SLinus Torvalds 67259c7c037SDmitry Torokhov case UI_SET_SWBIT: 67359c7c037SDmitry Torokhov retval = uinput_set_bit(arg, swbit, SW_MAX); 67459c7c037SDmitry Torokhov break; 67559c7c037SDmitry Torokhov 6761da177e4SLinus Torvalds case UI_SET_PHYS: 67729506415SDmitry Torokhov if (udev->state == UIST_CREATED) { 67829506415SDmitry Torokhov retval = -EINVAL; 67929506415SDmitry Torokhov goto out; 68029506415SDmitry Torokhov } 6811da177e4SLinus Torvalds length = strnlen_user(p, 1024); 6821da177e4SLinus Torvalds if (length <= 0) { 6831da177e4SLinus Torvalds retval = -EFAULT; 6841da177e4SLinus Torvalds break; 6851da177e4SLinus Torvalds } 6861da177e4SLinus Torvalds kfree(udev->dev->phys); 6875b6271bdSDmitry Torokhov udev->dev->phys = phys = kmalloc(length, GFP_KERNEL); 6885b6271bdSDmitry Torokhov if (!phys) { 6891da177e4SLinus Torvalds retval = -ENOMEM; 6901da177e4SLinus Torvalds break; 6911da177e4SLinus Torvalds } 6925b6271bdSDmitry Torokhov if (copy_from_user(phys, p, length)) { 6931da177e4SLinus Torvalds udev->dev->phys = NULL; 6945b6271bdSDmitry Torokhov kfree(phys); 6955b6271bdSDmitry Torokhov retval = -EFAULT; 6961da177e4SLinus Torvalds break; 6971da177e4SLinus Torvalds } 6985b6271bdSDmitry Torokhov phys[length - 1] = '\0'; 6991da177e4SLinus Torvalds break; 7001da177e4SLinus Torvalds 7011da177e4SLinus Torvalds case UI_BEGIN_FF_UPLOAD: 7022d56f3a3SPhilip Langdale retval = uinput_ff_upload_from_user(p, &ff_up); 7032d56f3a3SPhilip Langdale if (retval) 7041da177e4SLinus Torvalds break; 7052d56f3a3SPhilip Langdale 7061da177e4SLinus Torvalds req = uinput_request_find(udev, ff_up.request_id); 7072d56f3a3SPhilip Langdale if (!req || req->code != UI_FF_UPLOAD || !req->u.upload.effect) { 7081da177e4SLinus Torvalds retval = -EINVAL; 7091da177e4SLinus Torvalds break; 7101da177e4SLinus Torvalds } 7112d56f3a3SPhilip Langdale 7121da177e4SLinus Torvalds ff_up.retval = 0; 7132d56f3a3SPhilip Langdale ff_up.effect = *req->u.upload.effect; 714ff462551SAnssi Hannula if (req->u.upload.old) 7152d56f3a3SPhilip Langdale ff_up.old = *req->u.upload.old; 716ff462551SAnssi Hannula else 717ff462551SAnssi Hannula memset(&ff_up.old, 0, sizeof(struct ff_effect)); 718ff462551SAnssi Hannula 7192d56f3a3SPhilip Langdale retval = uinput_ff_upload_to_user(p, &ff_up); 7201da177e4SLinus Torvalds break; 7211da177e4SLinus Torvalds 7221da177e4SLinus Torvalds case UI_BEGIN_FF_ERASE: 7231da177e4SLinus Torvalds if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { 7241da177e4SLinus Torvalds retval = -EFAULT; 7251da177e4SLinus Torvalds break; 7261da177e4SLinus Torvalds } 7272d56f3a3SPhilip Langdale 7281da177e4SLinus Torvalds req = uinput_request_find(udev, ff_erase.request_id); 7292d56f3a3SPhilip Langdale if (!req || req->code != UI_FF_ERASE) { 7301da177e4SLinus Torvalds retval = -EINVAL; 7311da177e4SLinus Torvalds break; 7321da177e4SLinus Torvalds } 7332d56f3a3SPhilip Langdale 7341da177e4SLinus Torvalds ff_erase.retval = 0; 7351da177e4SLinus Torvalds ff_erase.effect_id = req->u.effect_id; 7361da177e4SLinus Torvalds if (copy_to_user(p, &ff_erase, sizeof(ff_erase))) { 7371da177e4SLinus Torvalds retval = -EFAULT; 7381da177e4SLinus Torvalds break; 7391da177e4SLinus Torvalds } 7402d56f3a3SPhilip Langdale 7411da177e4SLinus Torvalds break; 7421da177e4SLinus Torvalds 7431da177e4SLinus Torvalds case UI_END_FF_UPLOAD: 7442d56f3a3SPhilip Langdale retval = uinput_ff_upload_from_user(p, &ff_up); 7452d56f3a3SPhilip Langdale if (retval) 7461da177e4SLinus Torvalds break; 7472d56f3a3SPhilip Langdale 7481da177e4SLinus Torvalds req = uinput_request_find(udev, ff_up.request_id); 7492d56f3a3SPhilip Langdale if (!req || req->code != UI_FF_UPLOAD || 7502d56f3a3SPhilip Langdale !req->u.upload.effect) { 7511da177e4SLinus Torvalds retval = -EINVAL; 7521da177e4SLinus Torvalds break; 7531da177e4SLinus Torvalds } 7542d56f3a3SPhilip Langdale 7551da177e4SLinus Torvalds req->retval = ff_up.retval; 7560048e603SDmitry Torokhov uinput_request_done(udev, req); 7571da177e4SLinus Torvalds break; 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds case UI_END_FF_ERASE: 7601da177e4SLinus Torvalds if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { 7611da177e4SLinus Torvalds retval = -EFAULT; 7621da177e4SLinus Torvalds break; 7631da177e4SLinus Torvalds } 7642d56f3a3SPhilip Langdale 7651da177e4SLinus Torvalds req = uinput_request_find(udev, ff_erase.request_id); 7662d56f3a3SPhilip Langdale if (!req || req->code != UI_FF_ERASE) { 7671da177e4SLinus Torvalds retval = -EINVAL; 7681da177e4SLinus Torvalds break; 7691da177e4SLinus Torvalds } 7702d56f3a3SPhilip Langdale 7711da177e4SLinus Torvalds req->retval = ff_erase.retval; 7720048e603SDmitry Torokhov uinput_request_done(udev, req); 7731da177e4SLinus Torvalds break; 7741da177e4SLinus Torvalds 7751da177e4SLinus Torvalds default: 7761da177e4SLinus Torvalds retval = -EINVAL; 7771da177e4SLinus Torvalds } 77829506415SDmitry Torokhov 77929506415SDmitry Torokhov out: 780221979aaSDmitry Torokhov mutex_unlock(&udev->mutex); 7811da177e4SLinus Torvalds return retval; 7821da177e4SLinus Torvalds } 7831da177e4SLinus Torvalds 7842d56f3a3SPhilip Langdale static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 7852d56f3a3SPhilip Langdale { 7862d56f3a3SPhilip Langdale return uinput_ioctl_handler(file, cmd, arg, (void __user *)arg); 7872d56f3a3SPhilip Langdale } 7882d56f3a3SPhilip Langdale 7892d56f3a3SPhilip Langdale #ifdef CONFIG_COMPAT 7902d56f3a3SPhilip Langdale static long uinput_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 7912d56f3a3SPhilip Langdale { 7922d56f3a3SPhilip Langdale return uinput_ioctl_handler(file, cmd, arg, compat_ptr(arg)); 7932d56f3a3SPhilip Langdale } 7942d56f3a3SPhilip Langdale #endif 7952d56f3a3SPhilip Langdale 7962b8693c0SArjan van de Ven static const struct file_operations uinput_fops = { 7971da177e4SLinus Torvalds .owner = THIS_MODULE, 7981da177e4SLinus Torvalds .open = uinput_open, 79929506415SDmitry Torokhov .release = uinput_release, 8001da177e4SLinus Torvalds .read = uinput_read, 8011da177e4SLinus Torvalds .write = uinput_write, 8021da177e4SLinus Torvalds .poll = uinput_poll, 80329506415SDmitry Torokhov .unlocked_ioctl = uinput_ioctl, 8042d56f3a3SPhilip Langdale #ifdef CONFIG_COMPAT 8052d56f3a3SPhilip Langdale .compat_ioctl = uinput_compat_ioctl, 8062d56f3a3SPhilip Langdale #endif 807*6038f373SArnd Bergmann .llseek = no_llseek, 8081da177e4SLinus Torvalds }; 8091da177e4SLinus Torvalds 8101da177e4SLinus Torvalds static struct miscdevice uinput_misc = { 8111da177e4SLinus Torvalds .fops = &uinput_fops, 8121da177e4SLinus Torvalds .minor = UINPUT_MINOR, 8131da177e4SLinus Torvalds .name = UINPUT_NAME, 8141da177e4SLinus Torvalds }; 8158905aaafSKay Sievers MODULE_ALIAS_MISCDEV(UINPUT_MINOR); 8168905aaafSKay Sievers MODULE_ALIAS("devname:" UINPUT_NAME); 8171da177e4SLinus Torvalds 8181da177e4SLinus Torvalds static int __init uinput_init(void) 8191da177e4SLinus Torvalds { 8201da177e4SLinus Torvalds return misc_register(&uinput_misc); 8211da177e4SLinus Torvalds } 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds static void __exit uinput_exit(void) 8241da177e4SLinus Torvalds { 8251da177e4SLinus Torvalds misc_deregister(&uinput_misc); 8261da177e4SLinus Torvalds } 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds MODULE_AUTHOR("Aristeu Sergio Rozanski Filho"); 8291da177e4SLinus Torvalds MODULE_DESCRIPTION("User level driver support for input subsystem"); 8301da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 831ff462551SAnssi Hannula MODULE_VERSION("0.3"); 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds module_init(uinput_init); 8341da177e4SLinus Torvalds module_exit(uinput_exit); 8351da177e4SLinus Torvalds 836