Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * User level driver support for input subsystem |
| 3 | * |
| 4 | * Heavily based on evdev.c by Vojtech Pavlik |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | * |
| 20 | * Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org> |
| 21 | * |
| 22 | * Changes/Revisions: |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 23 | * 0.3 09/04/2006 (Anssi Hannula <anssi.hannula@gmail.com>) |
| 24 | * - updated ff support for the changes in kernel interface |
| 25 | * - added MODULE_VERSION |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | * 0.2 16/10/2004 (Micah Dowty <micah@navi.cx>) |
| 27 | * - added force feedback support |
| 28 | * - added UI_SET_PHYS |
| 29 | * 0.1 20/06/2002 |
| 30 | * - first public version |
| 31 | */ |
| 32 | #include <linux/poll.h> |
Alexey Dobriyan | a99bbaf | 2009-10-04 16:11:37 +0400 | [diff] [blame] | 33 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/slab.h> |
| 35 | #include <linux/module.h> |
| 36 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/fs.h> |
| 38 | #include <linux/miscdevice.h> |
| 39 | #include <linux/uinput.h> |
Henrik Rydberg | 47c78e8 | 2010-11-27 09:16:48 +0100 | [diff] [blame] | 40 | #include <linux/input/mt.h> |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 41 | #include "../input-compat.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Dmitry Torokhov | 54ce165 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 43 | static int uinput_dev_event(struct input_dev *dev, |
| 44 | unsigned int type, unsigned int code, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | { |
Dmitry Torokhov | 373f971 | 2007-04-12 01:34:33 -0400 | [diff] [blame] | 46 | struct uinput_device *udev = input_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | udev->buff[udev->head].type = type; |
| 49 | udev->buff[udev->head].code = code; |
| 50 | udev->buff[udev->head].value = value; |
| 51 | do_gettimeofday(&udev->buff[udev->head].time); |
| 52 | udev->head = (udev->head + 1) % UINPUT_BUFFER_SIZE; |
| 53 | |
| 54 | wake_up_interruptible(&udev->waitq); |
| 55 | |
| 56 | return 0; |
| 57 | } |
| 58 | |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 59 | /* Atomically allocate an ID for the given request. Returns 0 on success. */ |
Dmitry Torokhov | 00ce756 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 60 | static bool uinput_request_alloc_id(struct uinput_device *udev, |
| 61 | struct uinput_request *request) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | { |
Dmitry Torokhov | c5b3533 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 63 | unsigned int id; |
Dmitry Torokhov | 00ce756 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 64 | bool reserved = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 66 | spin_lock(&udev->requests_lock); |
Dmitry Torokhov | 152c12f | 2005-06-30 00:47:50 -0500 | [diff] [blame] | 67 | |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 68 | for (id = 0; id < UINPUT_NUM_REQUESTS; id++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | if (!udev->requests[id]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | request->id = id; |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 71 | udev->requests[id] = request; |
Dmitry Torokhov | 00ce756 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 72 | reserved = true; |
Dmitry Torokhov | 152c12f | 2005-06-30 00:47:50 -0500 | [diff] [blame] | 73 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | } |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 75 | } |
Dmitry Torokhov | 152c12f | 2005-06-30 00:47:50 -0500 | [diff] [blame] | 76 | |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 77 | spin_unlock(&udev->requests_lock); |
Dmitry Torokhov | 00ce756 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 78 | return reserved; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | } |
| 80 | |
Dmitry Torokhov | c5b3533 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 81 | static struct uinput_request *uinput_request_find(struct uinput_device *udev, |
| 82 | unsigned int id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | { |
| 84 | /* Find an input request, by ID. Returns NULL if the ID isn't valid. */ |
Dmitry Torokhov | c5b3533 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 85 | if (id >= UINPUT_NUM_REQUESTS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | return NULL; |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 87 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | return udev->requests[id]; |
| 89 | } |
| 90 | |
Dmitry Torokhov | 00ce756 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 91 | static int uinput_request_reserve_slot(struct uinput_device *udev, |
| 92 | struct uinput_request *request) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | { |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 94 | /* Allocate slot. If none are available right away, wait. */ |
| 95 | return wait_event_interruptible(udev->requests_waitq, |
Dmitry Torokhov | 00ce756 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 96 | uinput_request_alloc_id(udev, request)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | } |
| 98 | |
Dmitry Torokhov | 54ce165 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 99 | static void uinput_request_done(struct uinput_device *udev, |
| 100 | struct uinput_request *request) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | { |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 102 | /* Mark slot as available */ |
| 103 | udev->requests[request->id] = NULL; |
Dmitry Torokhov | e597f0c8 | 2005-11-20 00:51:43 -0500 | [diff] [blame] | 104 | wake_up(&udev->requests_waitq); |
Dmitry Torokhov | e7507ed | 2005-10-17 16:43:32 -0700 | [diff] [blame] | 105 | |
| 106 | complete(&request->done); |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 107 | } |
| 108 | |
Dmitry Torokhov | 00ce756 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 109 | static int uinput_request_send(struct uinput_device *udev, |
| 110 | struct uinput_request *request) |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 111 | { |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 112 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 114 | retval = mutex_lock_interruptible(&udev->mutex); |
| 115 | if (retval) |
| 116 | return retval; |
| 117 | |
| 118 | if (udev->state != UIST_CREATED) { |
| 119 | retval = -ENODEV; |
| 120 | goto out; |
| 121 | } |
| 122 | |
Dmitry Torokhov | 00ce756 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 123 | init_completion(&request->done); |
| 124 | |
| 125 | /* |
| 126 | * Tell our userspace application about this new request |
| 127 | * by queueing an input event. |
| 128 | */ |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 129 | uinput_dev_event(udev->dev, EV_UINPUT, request->code, request->id); |
| 130 | |
| 131 | out: |
| 132 | mutex_unlock(&udev->mutex); |
| 133 | return retval; |
| 134 | } |
| 135 | |
Dmitry Torokhov | 00ce756 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 136 | static int uinput_request_submit(struct uinput_device *udev, |
| 137 | struct uinput_request *request) |
| 138 | { |
| 139 | int error; |
| 140 | |
| 141 | error = uinput_request_reserve_slot(udev, request); |
| 142 | if (error) |
| 143 | return error; |
| 144 | |
| 145 | error = uinput_request_send(udev, request); |
| 146 | if (error) { |
| 147 | uinput_request_done(udev, request); |
| 148 | return error; |
| 149 | } |
| 150 | |
| 151 | wait_for_completion(&request->done); |
| 152 | return request->retval; |
| 153 | } |
| 154 | |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 155 | /* |
Dmitry Torokhov | 54ce165 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 156 | * Fail all outstanding requests so handlers don't wait for the userspace |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 157 | * to finish processing them. |
| 158 | */ |
| 159 | static void uinput_flush_requests(struct uinput_device *udev) |
| 160 | { |
| 161 | struct uinput_request *request; |
| 162 | int i; |
| 163 | |
| 164 | spin_lock(&udev->requests_lock); |
| 165 | |
| 166 | for (i = 0; i < UINPUT_NUM_REQUESTS; i++) { |
| 167 | request = udev->requests[i]; |
| 168 | if (request) { |
| 169 | request->retval = -ENODEV; |
| 170 | uinput_request_done(udev, request); |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | spin_unlock(&udev->requests_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | } |
| 176 | |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 177 | static void uinput_dev_set_gain(struct input_dev *dev, u16 gain) |
| 178 | { |
| 179 | uinput_dev_event(dev, EV_FF, FF_GAIN, gain); |
| 180 | } |
| 181 | |
| 182 | static void uinput_dev_set_autocenter(struct input_dev *dev, u16 magnitude) |
| 183 | { |
| 184 | uinput_dev_event(dev, EV_FF, FF_AUTOCENTER, magnitude); |
| 185 | } |
| 186 | |
| 187 | static int uinput_dev_playback(struct input_dev *dev, int effect_id, int value) |
| 188 | { |
| 189 | return uinput_dev_event(dev, EV_FF, effect_id, value); |
| 190 | } |
| 191 | |
Dmitry Torokhov | 54ce165 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 192 | static int uinput_dev_upload_effect(struct input_dev *dev, |
| 193 | struct ff_effect *effect, |
| 194 | struct ff_effect *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | { |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 196 | struct uinput_device *udev = input_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | struct uinput_request request; |
| 198 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 199 | /* |
| 200 | * uinput driver does not currently support periodic effects with |
| 201 | * custom waveform since it does not have a way to pass buffer of |
| 202 | * samples (custom_data) to userspace. If ever there is a device |
| 203 | * supporting custom waveforms we would need to define an additional |
| 204 | * ioctl (UI_UPLOAD_SAMPLES) but for now we just bail out. |
| 205 | */ |
| 206 | if (effect->type == FF_PERIODIC && |
| 207 | effect->u.periodic.waveform == FF_CUSTOM) |
| 208 | return -EINVAL; |
| 209 | |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 210 | request.code = UI_FF_UPLOAD; |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 211 | request.u.upload.effect = effect; |
| 212 | request.u.upload.old = old; |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 213 | |
Dmitry Torokhov | 00ce756 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 214 | return uinput_request_submit(udev, &request); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id) |
| 218 | { |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 219 | struct uinput_device *udev = input_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | struct uinput_request request; |
| 221 | |
| 222 | if (!test_bit(EV_FF, dev->evbit)) |
| 223 | return -ENOSYS; |
| 224 | |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 225 | request.code = UI_FF_ERASE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | request.u.effect_id = effect_id; |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 227 | |
Dmitry Torokhov | 00ce756 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 228 | return uinput_request_submit(udev, &request); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | } |
| 230 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 231 | static void uinput_destroy_device(struct uinput_device *udev) |
| 232 | { |
| 233 | const char *name, *phys; |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 234 | struct input_dev *dev = udev->dev; |
| 235 | enum uinput_state old_state = udev->state; |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 236 | |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 237 | udev->state = UIST_NEW_DEVICE; |
| 238 | |
| 239 | if (dev) { |
| 240 | name = dev->name; |
| 241 | phys = dev->phys; |
| 242 | if (old_state == UIST_CREATED) { |
| 243 | uinput_flush_requests(udev); |
| 244 | input_unregister_device(dev); |
| 245 | } else { |
| 246 | input_free_device(dev); |
| 247 | } |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 248 | kfree(name); |
| 249 | kfree(phys); |
| 250 | udev->dev = NULL; |
| 251 | } |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 252 | } |
| 253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | static int uinput_create_device(struct uinput_device *udev) |
| 255 | { |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 256 | struct input_dev *dev = udev->dev; |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 257 | int error; |
| 258 | |
| 259 | if (udev->state != UIST_SETUP_COMPLETE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | printk(KERN_DEBUG "%s: write device info first\n", UINPUT_NAME); |
| 261 | return -EINVAL; |
| 262 | } |
| 263 | |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 264 | if (udev->ff_effects_max) { |
| 265 | error = input_ff_create(dev, udev->ff_effects_max); |
| 266 | if (error) |
| 267 | goto fail1; |
| 268 | |
| 269 | dev->ff->upload = uinput_dev_upload_effect; |
| 270 | dev->ff->erase = uinput_dev_erase_effect; |
| 271 | dev->ff->playback = uinput_dev_playback; |
| 272 | dev->ff->set_gain = uinput_dev_set_gain; |
| 273 | dev->ff->set_autocenter = uinput_dev_set_autocenter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | } |
| 275 | |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 276 | error = input_register_device(udev->dev); |
| 277 | if (error) |
| 278 | goto fail2; |
| 279 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 280 | udev->state = UIST_CREATED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
| 282 | return 0; |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 283 | |
| 284 | fail2: input_ff_destroy(dev); |
| 285 | fail1: uinput_destroy_device(udev); |
| 286 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | static int uinput_open(struct inode *inode, struct file *file) |
| 290 | { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 291 | struct uinput_device *newdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 293 | newdev = kzalloc(sizeof(struct uinput_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | if (!newdev) |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 295 | return -ENOMEM; |
| 296 | |
Dmitry Torokhov | 221979a | 2006-02-19 00:22:36 -0500 | [diff] [blame] | 297 | mutex_init(&newdev->mutex); |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 298 | spin_lock_init(&newdev->requests_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | init_waitqueue_head(&newdev->requests_waitq); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 300 | init_waitqueue_head(&newdev->waitq); |
| 301 | newdev->state = UIST_NEW_DEVICE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
| 303 | file->private_data = newdev; |
Dmitry Torokhov | daf8a96 | 2010-02-04 00:30:39 -0800 | [diff] [blame] | 304 | nonseekable_open(inode, file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | static int uinput_validate_absbits(struct input_dev *dev) |
| 310 | { |
| 311 | unsigned int cnt; |
| 312 | int retval = 0; |
| 313 | |
Daniel Mack | 81c2a3b | 2010-05-20 22:52:58 -0700 | [diff] [blame] | 314 | for (cnt = 0; cnt < ABS_CNT; cnt++) { |
Peter Hutterer | a718d79 | 2011-03-30 22:25:34 -0700 | [diff] [blame] | 315 | int min, max; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | if (!test_bit(cnt, dev->absbit)) |
| 317 | continue; |
| 318 | |
Peter Hutterer | a718d79 | 2011-03-30 22:25:34 -0700 | [diff] [blame] | 319 | min = input_abs_get_min(dev, cnt); |
| 320 | max = input_abs_get_max(dev, cnt); |
| 321 | |
| 322 | if ((min != 0 || max != 0) && max <= min) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | printk(KERN_DEBUG |
| 324 | "%s: invalid abs[%02x] min:%d max:%d\n", |
| 325 | UINPUT_NAME, cnt, |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 326 | input_abs_get_min(dev, cnt), |
| 327 | input_abs_get_max(dev, cnt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | retval = -EINVAL; |
| 329 | break; |
| 330 | } |
| 331 | |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 332 | if (input_abs_get_flat(dev, cnt) > |
| 333 | input_abs_get_max(dev, cnt) - input_abs_get_min(dev, cnt)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | printk(KERN_DEBUG |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 335 | "%s: abs_flat #%02x out of range: %d " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | "(min:%d/max:%d)\n", |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 337 | UINPUT_NAME, cnt, |
| 338 | input_abs_get_flat(dev, cnt), |
| 339 | input_abs_get_min(dev, cnt), |
| 340 | input_abs_get_max(dev, cnt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | retval = -EINVAL; |
| 342 | break; |
| 343 | } |
| 344 | } |
| 345 | return retval; |
| 346 | } |
| 347 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 348 | static int uinput_allocate_device(struct uinput_device *udev) |
| 349 | { |
| 350 | udev->dev = input_allocate_device(); |
| 351 | if (!udev->dev) |
| 352 | return -ENOMEM; |
| 353 | |
| 354 | udev->dev->event = uinput_dev_event; |
Dmitry Torokhov | 373f971 | 2007-04-12 01:34:33 -0400 | [diff] [blame] | 355 | input_set_drvdata(udev->dev, udev); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 356 | |
| 357 | return 0; |
| 358 | } |
| 359 | |
Dmitry Torokhov | 54ce165 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 360 | static int uinput_setup_device(struct uinput_device *udev, |
| 361 | const char __user *buffer, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | { |
| 363 | struct uinput_user_dev *user_dev; |
| 364 | struct input_dev *dev; |
David Herrmann | 5d9d6e9 | 2011-02-11 01:10:44 -0800 | [diff] [blame] | 365 | int i; |
Dmitry Torokhov | 152c12f | 2005-06-30 00:47:50 -0500 | [diff] [blame] | 366 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 368 | if (count != sizeof(struct uinput_user_dev)) |
| 369 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 371 | if (!udev->dev) { |
| 372 | retval = uinput_allocate_device(udev); |
| 373 | if (retval) |
| 374 | return retval; |
| 375 | } |
| 376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | dev = udev->dev; |
| 378 | |
Dmitry Torokhov | 4dfcc27 | 2011-02-11 01:10:45 -0800 | [diff] [blame] | 379 | user_dev = memdup_user(buffer, sizeof(struct uinput_user_dev)); |
Dan Carpenter | 163d277 | 2011-02-18 08:30:52 -0800 | [diff] [blame] | 380 | if (IS_ERR(user_dev)) |
Dmitry Torokhov | 4dfcc27 | 2011-02-11 01:10:45 -0800 | [diff] [blame] | 381 | return PTR_ERR(user_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 383 | udev->ff_effects_max = user_dev->ff_effects_max; |
| 384 | |
David Herrmann | 5d9d6e9 | 2011-02-11 01:10:44 -0800 | [diff] [blame] | 385 | /* Ensure name is filled in */ |
| 386 | if (!user_dev->name[0]) { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 387 | retval = -EINVAL; |
| 388 | goto exit; |
| 389 | } |
| 390 | |
| 391 | kfree(dev->name); |
David Herrmann | 5d9d6e9 | 2011-02-11 01:10:44 -0800 | [diff] [blame] | 392 | dev->name = kstrndup(user_dev->name, UINPUT_MAX_NAME_SIZE, |
| 393 | GFP_KERNEL); |
| 394 | if (!dev->name) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | retval = -ENOMEM; |
| 396 | goto exit; |
| 397 | } |
| 398 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | dev->id.bustype = user_dev->id.bustype; |
| 400 | dev->id.vendor = user_dev->id.vendor; |
| 401 | dev->id.product = user_dev->id.product; |
| 402 | dev->id.version = user_dev->id.version; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 404 | for (i = 0; i < ABS_CNT; i++) { |
| 405 | input_abs_set_max(dev, i, user_dev->absmax[i]); |
| 406 | input_abs_set_min(dev, i, user_dev->absmin[i]); |
| 407 | input_abs_set_fuzz(dev, i, user_dev->absfuzz[i]); |
| 408 | input_abs_set_flat(dev, i, user_dev->absflat[i]); |
| 409 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
| 411 | /* check if absmin/absmax/absfuzz/absflat are filled as |
| 412 | * told in Documentation/input/input-programming.txt */ |
| 413 | if (test_bit(EV_ABS, dev->evbit)) { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 414 | retval = uinput_validate_absbits(dev); |
| 415 | if (retval < 0) |
| 416 | goto exit; |
Henrik Rydberg | 38e7afe | 2010-09-19 16:25:36 -0700 | [diff] [blame] | 417 | if (test_bit(ABS_MT_SLOT, dev->absbit)) { |
| 418 | int nslot = input_abs_get_max(dev, ABS_MT_SLOT) + 1; |
Henrik Rydberg | b4adbbe | 2012-08-11 22:07:55 +0200 | [diff] [blame] | 419 | input_mt_init_slots(dev, nslot, 0); |
Henrik Rydberg | 38e7afe | 2010-09-19 16:25:36 -0700 | [diff] [blame] | 420 | } else if (test_bit(ABS_MT_POSITION_X, dev->absbit)) { |
| 421 | input_set_events_per_packet(dev, 60); |
| 422 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | } |
| 424 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 425 | udev->state = UIST_SETUP_COMPLETE; |
| 426 | retval = count; |
| 427 | |
| 428 | exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | kfree(user_dev); |
| 430 | return retval; |
| 431 | } |
| 432 | |
Dmitry Torokhov | 54ce165 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 433 | static ssize_t uinput_inject_event(struct uinput_device *udev, |
| 434 | const char __user *buffer, size_t count) |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 435 | { |
| 436 | struct input_event ev; |
| 437 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 438 | if (count < input_event_size()) |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 439 | return -EINVAL; |
| 440 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 441 | if (input_event_from_user(buffer, &ev)) |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 442 | return -EFAULT; |
| 443 | |
| 444 | input_event(udev->dev, ev.type, ev.code, ev.value); |
| 445 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 446 | return input_event_size(); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 447 | } |
| 448 | |
Dmitry Torokhov | 54ce165 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 449 | static ssize_t uinput_write(struct file *file, const char __user *buffer, |
| 450 | size_t count, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | { |
| 452 | struct uinput_device *udev = file->private_data; |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 453 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | |
Dmitry Torokhov | 22ae19c | 2012-07-29 22:48:31 -0700 | [diff] [blame] | 455 | if (count == 0) |
| 456 | return 0; |
| 457 | |
Dmitry Torokhov | 221979a | 2006-02-19 00:22:36 -0500 | [diff] [blame] | 458 | retval = mutex_lock_interruptible(&udev->mutex); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 459 | if (retval) |
| 460 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 462 | retval = udev->state == UIST_CREATED ? |
| 463 | uinput_inject_event(udev, buffer, count) : |
| 464 | uinput_setup_device(udev, buffer, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | |
Dmitry Torokhov | 221979a | 2006-02-19 00:22:36 -0500 | [diff] [blame] | 466 | mutex_unlock(&udev->mutex); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 467 | |
| 468 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | } |
| 470 | |
Dmitry Torokhov | 929d1af | 2012-07-29 22:48:31 -0700 | [diff] [blame] | 471 | static bool uinput_fetch_next_event(struct uinput_device *udev, |
| 472 | struct input_event *event) |
| 473 | { |
| 474 | bool have_event; |
| 475 | |
| 476 | spin_lock_irq(&udev->dev->event_lock); |
| 477 | |
| 478 | have_event = udev->head != udev->tail; |
| 479 | if (have_event) { |
| 480 | *event = udev->buff[udev->tail]; |
| 481 | udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE; |
| 482 | } |
| 483 | |
| 484 | spin_unlock_irq(&udev->dev->event_lock); |
| 485 | |
| 486 | return have_event; |
| 487 | } |
| 488 | |
Dmitry Torokhov | 22ae19c | 2012-07-29 22:48:31 -0700 | [diff] [blame] | 489 | static ssize_t uinput_events_to_user(struct uinput_device *udev, |
| 490 | char __user *buffer, size_t count) |
| 491 | { |
| 492 | struct input_event event; |
| 493 | size_t read = 0; |
Dmitry Torokhov | 22ae19c | 2012-07-29 22:48:31 -0700 | [diff] [blame] | 494 | |
| 495 | while (read + input_event_size() <= count && |
| 496 | uinput_fetch_next_event(udev, &event)) { |
| 497 | |
Dmitry Torokhov | 00ce756 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 498 | if (input_event_to_user(buffer + read, &event)) |
| 499 | return -EFAULT; |
Dmitry Torokhov | 22ae19c | 2012-07-29 22:48:31 -0700 | [diff] [blame] | 500 | |
| 501 | read += input_event_size(); |
| 502 | } |
| 503 | |
Dmitry Torokhov | 00ce756 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 504 | return read; |
Dmitry Torokhov | 22ae19c | 2012-07-29 22:48:31 -0700 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | static ssize_t uinput_read(struct file *file, char __user *buffer, |
| 508 | size_t count, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | { |
| 510 | struct uinput_device *udev = file->private_data; |
Dmitry Torokhov | 22ae19c | 2012-07-29 22:48:31 -0700 | [diff] [blame] | 511 | ssize_t retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
David Herrmann | f40033a | 2012-07-29 22:48:31 -0700 | [diff] [blame] | 513 | if (count != 0 && count < input_event_size()) |
| 514 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
Dmitry Torokhov | 22ae19c | 2012-07-29 22:48:31 -0700 | [diff] [blame] | 516 | do { |
| 517 | retval = mutex_lock_interruptible(&udev->mutex); |
| 518 | if (retval) |
| 519 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | |
Dmitry Torokhov | 22ae19c | 2012-07-29 22:48:31 -0700 | [diff] [blame] | 521 | if (udev->state != UIST_CREATED) |
| 522 | retval = -ENODEV; |
| 523 | else if (udev->head == udev->tail && |
| 524 | (file->f_flags & O_NONBLOCK)) |
| 525 | retval = -EAGAIN; |
| 526 | else |
| 527 | retval = uinput_events_to_user(udev, buffer, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | |
Dmitry Torokhov | 22ae19c | 2012-07-29 22:48:31 -0700 | [diff] [blame] | 529 | mutex_unlock(&udev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | |
Dmitry Torokhov | 22ae19c | 2012-07-29 22:48:31 -0700 | [diff] [blame] | 531 | if (retval || count == 0) |
| 532 | break; |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 533 | |
Dmitry Torokhov | 22ae19c | 2012-07-29 22:48:31 -0700 | [diff] [blame] | 534 | if (!(file->f_flags & O_NONBLOCK)) |
| 535 | retval = wait_event_interruptible(udev->waitq, |
| 536 | udev->head != udev->tail || |
| 537 | udev->state != UIST_CREATED); |
| 538 | } while (retval == 0); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 539 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | return retval; |
| 541 | } |
| 542 | |
| 543 | static unsigned int uinput_poll(struct file *file, poll_table *wait) |
| 544 | { |
| 545 | struct uinput_device *udev = file->private_data; |
| 546 | |
| 547 | poll_wait(file, &udev->waitq, wait); |
| 548 | |
| 549 | if (udev->head != udev->tail) |
| 550 | return POLLIN | POLLRDNORM; |
| 551 | |
| 552 | return 0; |
| 553 | } |
| 554 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 555 | static int uinput_release(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 557 | struct uinput_device *udev = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 559 | uinput_destroy_device(udev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | kfree(udev); |
| 561 | |
| 562 | return 0; |
| 563 | } |
| 564 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 565 | #ifdef CONFIG_COMPAT |
| 566 | struct uinput_ff_upload_compat { |
Dmitry Torokhov | c5b3533 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 567 | __u32 request_id; |
| 568 | __s32 retval; |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 569 | struct ff_effect_compat effect; |
| 570 | struct ff_effect_compat old; |
| 571 | }; |
| 572 | |
| 573 | static int uinput_ff_upload_to_user(char __user *buffer, |
| 574 | const struct uinput_ff_upload *ff_up) |
| 575 | { |
| 576 | if (INPUT_COMPAT_TEST) { |
| 577 | struct uinput_ff_upload_compat ff_up_compat; |
| 578 | |
| 579 | ff_up_compat.request_id = ff_up->request_id; |
| 580 | ff_up_compat.retval = ff_up->retval; |
| 581 | /* |
| 582 | * It so happens that the pointer that gives us the trouble |
| 583 | * is the last field in the structure. Since we don't support |
| 584 | * custom waveforms in uinput anyway we can just copy the whole |
| 585 | * thing (to the compat size) and ignore the pointer. |
| 586 | */ |
| 587 | memcpy(&ff_up_compat.effect, &ff_up->effect, |
| 588 | sizeof(struct ff_effect_compat)); |
| 589 | memcpy(&ff_up_compat.old, &ff_up->old, |
| 590 | sizeof(struct ff_effect_compat)); |
| 591 | |
| 592 | if (copy_to_user(buffer, &ff_up_compat, |
| 593 | sizeof(struct uinput_ff_upload_compat))) |
| 594 | return -EFAULT; |
| 595 | } else { |
| 596 | if (copy_to_user(buffer, ff_up, |
| 597 | sizeof(struct uinput_ff_upload))) |
| 598 | return -EFAULT; |
| 599 | } |
| 600 | |
| 601 | return 0; |
| 602 | } |
| 603 | |
| 604 | static int uinput_ff_upload_from_user(const char __user *buffer, |
| 605 | struct uinput_ff_upload *ff_up) |
| 606 | { |
| 607 | if (INPUT_COMPAT_TEST) { |
| 608 | struct uinput_ff_upload_compat ff_up_compat; |
| 609 | |
| 610 | if (copy_from_user(&ff_up_compat, buffer, |
| 611 | sizeof(struct uinput_ff_upload_compat))) |
| 612 | return -EFAULT; |
| 613 | |
| 614 | ff_up->request_id = ff_up_compat.request_id; |
| 615 | ff_up->retval = ff_up_compat.retval; |
| 616 | memcpy(&ff_up->effect, &ff_up_compat.effect, |
| 617 | sizeof(struct ff_effect_compat)); |
| 618 | memcpy(&ff_up->old, &ff_up_compat.old, |
| 619 | sizeof(struct ff_effect_compat)); |
| 620 | |
| 621 | } else { |
| 622 | if (copy_from_user(ff_up, buffer, |
| 623 | sizeof(struct uinput_ff_upload))) |
| 624 | return -EFAULT; |
| 625 | } |
| 626 | |
| 627 | return 0; |
| 628 | } |
| 629 | |
| 630 | #else |
| 631 | |
| 632 | static int uinput_ff_upload_to_user(char __user *buffer, |
| 633 | const struct uinput_ff_upload *ff_up) |
| 634 | { |
| 635 | if (copy_to_user(buffer, ff_up, sizeof(struct uinput_ff_upload))) |
| 636 | return -EFAULT; |
| 637 | |
| 638 | return 0; |
| 639 | } |
| 640 | |
| 641 | static int uinput_ff_upload_from_user(const char __user *buffer, |
| 642 | struct uinput_ff_upload *ff_up) |
| 643 | { |
| 644 | if (copy_from_user(ff_up, buffer, sizeof(struct uinput_ff_upload))) |
| 645 | return -EFAULT; |
| 646 | |
| 647 | return 0; |
| 648 | } |
| 649 | |
| 650 | #endif |
| 651 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 652 | #define uinput_set_bit(_arg, _bit, _max) \ |
| 653 | ({ \ |
| 654 | int __ret = 0; \ |
| 655 | if (udev->state == UIST_CREATED) \ |
| 656 | __ret = -EINVAL; \ |
| 657 | else if ((_arg) > (_max)) \ |
| 658 | __ret = -EINVAL; \ |
| 659 | else set_bit((_arg), udev->dev->_bit); \ |
| 660 | __ret; \ |
| 661 | }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 663 | static long uinput_ioctl_handler(struct file *file, unsigned int cmd, |
| 664 | unsigned long arg, void __user *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 666 | int retval; |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 667 | struct uinput_device *udev = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | struct uinput_ff_upload ff_up; |
| 669 | struct uinput_ff_erase ff_erase; |
| 670 | struct uinput_request *req; |
Dmitry Torokhov | 5b6271bd | 2005-06-30 00:50:38 -0500 | [diff] [blame] | 671 | char *phys; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | |
Dmitry Torokhov | 221979a | 2006-02-19 00:22:36 -0500 | [diff] [blame] | 673 | retval = mutex_lock_interruptible(&udev->mutex); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 674 | if (retval) |
| 675 | return retval; |
| 676 | |
| 677 | if (!udev->dev) { |
| 678 | retval = uinput_allocate_device(udev); |
| 679 | if (retval) |
| 680 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | } |
| 682 | |
| 683 | switch (cmd) { |
| 684 | case UI_DEV_CREATE: |
| 685 | retval = uinput_create_device(udev); |
| 686 | break; |
| 687 | |
| 688 | case UI_DEV_DESTROY: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 689 | uinput_destroy_device(udev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | break; |
| 691 | |
| 692 | case UI_SET_EVBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 693 | retval = uinput_set_bit(arg, evbit, EV_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | break; |
| 695 | |
| 696 | case UI_SET_KEYBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 697 | retval = uinput_set_bit(arg, keybit, KEY_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | break; |
| 699 | |
| 700 | case UI_SET_RELBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 701 | retval = uinput_set_bit(arg, relbit, REL_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | break; |
| 703 | |
| 704 | case UI_SET_ABSBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 705 | retval = uinput_set_bit(arg, absbit, ABS_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | break; |
| 707 | |
| 708 | case UI_SET_MSCBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 709 | retval = uinput_set_bit(arg, mscbit, MSC_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | break; |
| 711 | |
| 712 | case UI_SET_LEDBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 713 | retval = uinput_set_bit(arg, ledbit, LED_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | break; |
| 715 | |
| 716 | case UI_SET_SNDBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 717 | retval = uinput_set_bit(arg, sndbit, SND_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | break; |
| 719 | |
| 720 | case UI_SET_FFBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 721 | retval = uinput_set_bit(arg, ffbit, FF_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | break; |
| 723 | |
Dmitry Torokhov | 59c7c03 | 2005-11-20 00:51:33 -0500 | [diff] [blame] | 724 | case UI_SET_SWBIT: |
| 725 | retval = uinput_set_bit(arg, swbit, SW_MAX); |
| 726 | break; |
| 727 | |
Henrik Rydberg | 85b7720 | 2010-12-18 20:51:13 +0100 | [diff] [blame] | 728 | case UI_SET_PROPBIT: |
| 729 | retval = uinput_set_bit(arg, propbit, INPUT_PROP_MAX); |
| 730 | break; |
| 731 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | case UI_SET_PHYS: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 733 | if (udev->state == UIST_CREATED) { |
| 734 | retval = -EINVAL; |
| 735 | goto out; |
| 736 | } |
Dmitry Torokhov | 4dfcc27 | 2011-02-11 01:10:45 -0800 | [diff] [blame] | 737 | |
| 738 | phys = strndup_user(p, 1024); |
| 739 | if (IS_ERR(phys)) { |
| 740 | retval = PTR_ERR(phys); |
| 741 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | } |
Dmitry Torokhov | 4dfcc27 | 2011-02-11 01:10:45 -0800 | [diff] [blame] | 743 | |
Dmitry Torokhov | 5b6271bd | 2005-06-30 00:50:38 -0500 | [diff] [blame] | 744 | kfree(udev->dev->phys); |
Dmitry Torokhov | 4dfcc27 | 2011-02-11 01:10:45 -0800 | [diff] [blame] | 745 | udev->dev->phys = phys; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | break; |
| 747 | |
| 748 | case UI_BEGIN_FF_UPLOAD: |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 749 | retval = uinput_ff_upload_from_user(p, &ff_up); |
| 750 | if (retval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | break; |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 752 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | req = uinput_request_find(udev, ff_up.request_id); |
Dmitry Torokhov | 54ce165 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 754 | if (!req || req->code != UI_FF_UPLOAD || |
| 755 | !req->u.upload.effect) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | retval = -EINVAL; |
| 757 | break; |
| 758 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 759 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | ff_up.retval = 0; |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 761 | ff_up.effect = *req->u.upload.effect; |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 762 | if (req->u.upload.old) |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 763 | ff_up.old = *req->u.upload.old; |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 764 | else |
| 765 | memset(&ff_up.old, 0, sizeof(struct ff_effect)); |
| 766 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 767 | retval = uinput_ff_upload_to_user(p, &ff_up); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | break; |
| 769 | |
| 770 | case UI_BEGIN_FF_ERASE: |
| 771 | if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { |
| 772 | retval = -EFAULT; |
| 773 | break; |
| 774 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 775 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | req = uinput_request_find(udev, ff_erase.request_id); |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 777 | if (!req || req->code != UI_FF_ERASE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | retval = -EINVAL; |
| 779 | break; |
| 780 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 781 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | ff_erase.retval = 0; |
| 783 | ff_erase.effect_id = req->u.effect_id; |
| 784 | if (copy_to_user(p, &ff_erase, sizeof(ff_erase))) { |
| 785 | retval = -EFAULT; |
| 786 | break; |
| 787 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 788 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | break; |
| 790 | |
| 791 | case UI_END_FF_UPLOAD: |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 792 | retval = uinput_ff_upload_from_user(p, &ff_up); |
| 793 | if (retval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | break; |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 795 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | req = uinput_request_find(udev, ff_up.request_id); |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 797 | if (!req || req->code != UI_FF_UPLOAD || |
| 798 | !req->u.upload.effect) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | retval = -EINVAL; |
| 800 | break; |
| 801 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 802 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | req->retval = ff_up.retval; |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 804 | uinput_request_done(udev, req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | break; |
| 806 | |
| 807 | case UI_END_FF_ERASE: |
| 808 | if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { |
| 809 | retval = -EFAULT; |
| 810 | break; |
| 811 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 812 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | req = uinput_request_find(udev, ff_erase.request_id); |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 814 | if (!req || req->code != UI_FF_ERASE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | retval = -EINVAL; |
| 816 | break; |
| 817 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 818 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | req->retval = ff_erase.retval; |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 820 | uinput_request_done(udev, req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | break; |
| 822 | |
| 823 | default: |
| 824 | retval = -EINVAL; |
| 825 | } |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 826 | |
| 827 | out: |
Dmitry Torokhov | 221979a | 2006-02-19 00:22:36 -0500 | [diff] [blame] | 828 | mutex_unlock(&udev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | return retval; |
| 830 | } |
| 831 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 832 | static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 833 | { |
| 834 | return uinput_ioctl_handler(file, cmd, arg, (void __user *)arg); |
| 835 | } |
| 836 | |
| 837 | #ifdef CONFIG_COMPAT |
Dmitry Torokhov | 54ce165 | 2012-07-29 22:48:32 -0700 | [diff] [blame] | 838 | static long uinput_compat_ioctl(struct file *file, |
| 839 | unsigned int cmd, unsigned long arg) |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 840 | { |
| 841 | return uinput_ioctl_handler(file, cmd, arg, compat_ptr(arg)); |
| 842 | } |
| 843 | #endif |
| 844 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 845 | static const struct file_operations uinput_fops = { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 846 | .owner = THIS_MODULE, |
| 847 | .open = uinput_open, |
| 848 | .release = uinput_release, |
| 849 | .read = uinput_read, |
| 850 | .write = uinput_write, |
| 851 | .poll = uinput_poll, |
| 852 | .unlocked_ioctl = uinput_ioctl, |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 853 | #ifdef CONFIG_COMPAT |
| 854 | .compat_ioctl = uinput_compat_ioctl, |
| 855 | #endif |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 856 | .llseek = no_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | }; |
| 858 | |
| 859 | static struct miscdevice uinput_misc = { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 860 | .fops = &uinput_fops, |
| 861 | .minor = UINPUT_MINOR, |
| 862 | .name = UINPUT_NAME, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | }; |
Kay Sievers | 8905aaa | 2010-08-19 09:52:28 -0700 | [diff] [blame] | 864 | MODULE_ALIAS_MISCDEV(UINPUT_MINOR); |
| 865 | MODULE_ALIAS("devname:" UINPUT_NAME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | |
| 867 | static int __init uinput_init(void) |
| 868 | { |
| 869 | return misc_register(&uinput_misc); |
| 870 | } |
| 871 | |
| 872 | static void __exit uinput_exit(void) |
| 873 | { |
| 874 | misc_deregister(&uinput_misc); |
| 875 | } |
| 876 | |
| 877 | MODULE_AUTHOR("Aristeu Sergio Rozanski Filho"); |
| 878 | MODULE_DESCRIPTION("User level driver support for input subsystem"); |
| 879 | MODULE_LICENSE("GPL"); |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 880 | MODULE_VERSION("0.3"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | |
| 882 | module_init(uinput_init); |
| 883 | module_exit(uinput_exit); |