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> |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 40 | #include "../input-compat.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
| 43 | { |
Dmitry Torokhov | 373f971 | 2007-04-12 01:34:33 -0400 | [diff] [blame] | 44 | struct uinput_device *udev = input_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | udev->buff[udev->head].type = type; |
| 47 | udev->buff[udev->head].code = code; |
| 48 | udev->buff[udev->head].value = value; |
| 49 | do_gettimeofday(&udev->buff[udev->head].time); |
| 50 | udev->head = (udev->head + 1) % UINPUT_BUFFER_SIZE; |
| 51 | |
| 52 | wake_up_interruptible(&udev->waitq); |
| 53 | |
| 54 | return 0; |
| 55 | } |
| 56 | |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 57 | /* Atomically allocate an ID for the given request. Returns 0 on success. */ |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 58 | static int uinput_request_alloc_id(struct uinput_device *udev, struct uinput_request *request) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | int id; |
Dmitry Torokhov | 152c12f | 2005-06-30 00:47:50 -0500 | [diff] [blame] | 61 | int err = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 63 | spin_lock(&udev->requests_lock); |
Dmitry Torokhov | 152c12f | 2005-06-30 00:47:50 -0500 | [diff] [blame] | 64 | |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 65 | for (id = 0; id < UINPUT_NUM_REQUESTS; id++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | if (!udev->requests[id]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | request->id = id; |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 68 | udev->requests[id] = request; |
Dmitry Torokhov | 152c12f | 2005-06-30 00:47:50 -0500 | [diff] [blame] | 69 | err = 0; |
| 70 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | } |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 72 | } |
Dmitry Torokhov | 152c12f | 2005-06-30 00:47:50 -0500 | [diff] [blame] | 73 | |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 74 | spin_unlock(&udev->requests_lock); |
Dmitry Torokhov | 152c12f | 2005-06-30 00:47:50 -0500 | [diff] [blame] | 75 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | } |
| 77 | |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 78 | static struct uinput_request *uinput_request_find(struct uinput_device *udev, int id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | { |
| 80 | /* Find an input request, by ID. Returns NULL if the ID isn't valid. */ |
| 81 | if (id >= UINPUT_NUM_REQUESTS || id < 0) |
| 82 | return NULL; |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | return udev->requests[id]; |
| 85 | } |
| 86 | |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 87 | static inline int uinput_request_reserve_slot(struct uinput_device *udev, struct uinput_request *request) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | { |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 89 | /* Allocate slot. If none are available right away, wait. */ |
| 90 | return wait_event_interruptible(udev->requests_waitq, |
| 91 | !uinput_request_alloc_id(udev, request)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | } |
| 93 | |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 94 | static void uinput_request_done(struct uinput_device *udev, struct uinput_request *request) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | { |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 96 | /* Mark slot as available */ |
| 97 | udev->requests[request->id] = NULL; |
Dmitry Torokhov | e597f0c8 | 2005-11-20 00:51:43 -0500 | [diff] [blame] | 98 | wake_up(&udev->requests_waitq); |
Dmitry Torokhov | e7507ed | 2005-10-17 16:43:32 -0700 | [diff] [blame] | 99 | |
| 100 | complete(&request->done); |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 101 | } |
| 102 | |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 103 | static int uinput_request_submit(struct uinput_device *udev, struct uinput_request *request) |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 104 | { |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 105 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 107 | retval = uinput_request_reserve_slot(udev, request); |
| 108 | if (retval) |
| 109 | return retval; |
| 110 | |
| 111 | retval = mutex_lock_interruptible(&udev->mutex); |
| 112 | if (retval) |
| 113 | return retval; |
| 114 | |
| 115 | if (udev->state != UIST_CREATED) { |
| 116 | retval = -ENODEV; |
| 117 | goto out; |
| 118 | } |
| 119 | |
| 120 | /* Tell our userspace app about this new request by queueing an input event */ |
| 121 | uinput_dev_event(udev->dev, EV_UINPUT, request->code, request->id); |
| 122 | |
| 123 | out: |
| 124 | mutex_unlock(&udev->mutex); |
| 125 | return retval; |
| 126 | } |
| 127 | |
| 128 | /* |
| 129 | * Fail all ouitstanding requests so handlers don't wait for the userspace |
| 130 | * to finish processing them. |
| 131 | */ |
| 132 | static void uinput_flush_requests(struct uinput_device *udev) |
| 133 | { |
| 134 | struct uinput_request *request; |
| 135 | int i; |
| 136 | |
| 137 | spin_lock(&udev->requests_lock); |
| 138 | |
| 139 | for (i = 0; i < UINPUT_NUM_REQUESTS; i++) { |
| 140 | request = udev->requests[i]; |
| 141 | if (request) { |
| 142 | request->retval = -ENODEV; |
| 143 | uinput_request_done(udev, request); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | spin_unlock(&udev->requests_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | } |
| 149 | |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 150 | static void uinput_dev_set_gain(struct input_dev *dev, u16 gain) |
| 151 | { |
| 152 | uinput_dev_event(dev, EV_FF, FF_GAIN, gain); |
| 153 | } |
| 154 | |
| 155 | static void uinput_dev_set_autocenter(struct input_dev *dev, u16 magnitude) |
| 156 | { |
| 157 | uinput_dev_event(dev, EV_FF, FF_AUTOCENTER, magnitude); |
| 158 | } |
| 159 | |
| 160 | static int uinput_dev_playback(struct input_dev *dev, int effect_id, int value) |
| 161 | { |
| 162 | return uinput_dev_event(dev, EV_FF, effect_id, value); |
| 163 | } |
| 164 | |
| 165 | static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | { |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 167 | struct uinput_device *udev = input_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | struct uinput_request request; |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 169 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 171 | /* |
| 172 | * uinput driver does not currently support periodic effects with |
| 173 | * custom waveform since it does not have a way to pass buffer of |
| 174 | * samples (custom_data) to userspace. If ever there is a device |
| 175 | * supporting custom waveforms we would need to define an additional |
| 176 | * ioctl (UI_UPLOAD_SAMPLES) but for now we just bail out. |
| 177 | */ |
| 178 | if (effect->type == FF_PERIODIC && |
| 179 | effect->u.periodic.waveform == FF_CUSTOM) |
| 180 | return -EINVAL; |
| 181 | |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 182 | request.id = -1; |
| 183 | init_completion(&request.done); |
| 184 | request.code = UI_FF_UPLOAD; |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 185 | request.u.upload.effect = effect; |
| 186 | request.u.upload.old = old; |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 187 | |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 188 | retval = uinput_request_submit(udev, &request); |
| 189 | if (!retval) { |
| 190 | wait_for_completion(&request.done); |
| 191 | retval = request.retval; |
| 192 | } |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 193 | |
| 194 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id) |
| 198 | { |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 199 | struct uinput_device *udev = input_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | struct uinput_request request; |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 201 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
| 203 | if (!test_bit(EV_FF, dev->evbit)) |
| 204 | return -ENOSYS; |
| 205 | |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 206 | request.id = -1; |
| 207 | init_completion(&request.done); |
| 208 | request.code = UI_FF_ERASE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | request.u.effect_id = effect_id; |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 210 | |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 211 | retval = uinput_request_submit(udev, &request); |
| 212 | if (!retval) { |
| 213 | wait_for_completion(&request.done); |
| 214 | retval = request.retval; |
| 215 | } |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 216 | |
| 217 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | } |
| 219 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 220 | static void uinput_destroy_device(struct uinput_device *udev) |
| 221 | { |
| 222 | const char *name, *phys; |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 223 | struct input_dev *dev = udev->dev; |
| 224 | enum uinput_state old_state = udev->state; |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 225 | |
Aristeu Sergio Rozanski Filho | 05cebd3 | 2009-05-14 22:01:57 -0700 | [diff] [blame] | 226 | udev->state = UIST_NEW_DEVICE; |
| 227 | |
| 228 | if (dev) { |
| 229 | name = dev->name; |
| 230 | phys = dev->phys; |
| 231 | if (old_state == UIST_CREATED) { |
| 232 | uinput_flush_requests(udev); |
| 233 | input_unregister_device(dev); |
| 234 | } else { |
| 235 | input_free_device(dev); |
| 236 | } |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 237 | kfree(name); |
| 238 | kfree(phys); |
| 239 | udev->dev = NULL; |
| 240 | } |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 241 | } |
| 242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | static int uinput_create_device(struct uinput_device *udev) |
| 244 | { |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 245 | struct input_dev *dev = udev->dev; |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 246 | int error; |
| 247 | |
| 248 | if (udev->state != UIST_SETUP_COMPLETE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | printk(KERN_DEBUG "%s: write device info first\n", UINPUT_NAME); |
| 250 | return -EINVAL; |
| 251 | } |
| 252 | |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 253 | if (udev->ff_effects_max) { |
| 254 | error = input_ff_create(dev, udev->ff_effects_max); |
| 255 | if (error) |
| 256 | goto fail1; |
| 257 | |
| 258 | dev->ff->upload = uinput_dev_upload_effect; |
| 259 | dev->ff->erase = uinput_dev_erase_effect; |
| 260 | dev->ff->playback = uinput_dev_playback; |
| 261 | dev->ff->set_gain = uinput_dev_set_gain; |
| 262 | dev->ff->set_autocenter = uinput_dev_set_autocenter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | } |
| 264 | |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 265 | error = input_register_device(udev->dev); |
| 266 | if (error) |
| 267 | goto fail2; |
| 268 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 269 | udev->state = UIST_CREATED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
| 271 | return 0; |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 272 | |
| 273 | fail2: input_ff_destroy(dev); |
| 274 | fail1: uinput_destroy_device(udev); |
| 275 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | static int uinput_open(struct inode *inode, struct file *file) |
| 279 | { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 280 | struct uinput_device *newdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 282 | newdev = kzalloc(sizeof(struct uinput_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | if (!newdev) |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 284 | return -ENOMEM; |
| 285 | |
Dmitry Torokhov | 221979a | 2006-02-19 00:22:36 -0500 | [diff] [blame] | 286 | mutex_init(&newdev->mutex); |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 287 | spin_lock_init(&newdev->requests_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | init_waitqueue_head(&newdev->requests_waitq); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 289 | init_waitqueue_head(&newdev->waitq); |
| 290 | newdev->state = UIST_NEW_DEVICE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
| 292 | file->private_data = newdev; |
Dmitry Torokhov | daf8a96 | 2010-02-04 00:30:39 -0800 | [diff] [blame] | 293 | nonseekable_open(inode, file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
| 295 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | } |
| 297 | |
| 298 | static int uinput_validate_absbits(struct input_dev *dev) |
| 299 | { |
| 300 | unsigned int cnt; |
| 301 | int retval = 0; |
| 302 | |
Daniel Mack | 81c2a3b | 2010-05-20 22:52:58 -0700 | [diff] [blame] | 303 | for (cnt = 0; cnt < ABS_CNT; cnt++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | if (!test_bit(cnt, dev->absbit)) |
| 305 | continue; |
| 306 | |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 307 | if (input_abs_get_max(dev, cnt) <= input_abs_get_min(dev, cnt)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | printk(KERN_DEBUG |
| 309 | "%s: invalid abs[%02x] min:%d max:%d\n", |
| 310 | UINPUT_NAME, cnt, |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 311 | input_abs_get_min(dev, cnt), |
| 312 | input_abs_get_max(dev, cnt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | retval = -EINVAL; |
| 314 | break; |
| 315 | } |
| 316 | |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 317 | if (input_abs_get_flat(dev, cnt) > |
| 318 | input_abs_get_max(dev, cnt) - input_abs_get_min(dev, cnt)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | printk(KERN_DEBUG |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 320 | "%s: abs_flat #%02x out of range: %d " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | "(min:%d/max:%d)\n", |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 322 | UINPUT_NAME, cnt, |
| 323 | input_abs_get_flat(dev, cnt), |
| 324 | input_abs_get_min(dev, cnt), |
| 325 | input_abs_get_max(dev, cnt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | retval = -EINVAL; |
| 327 | break; |
| 328 | } |
| 329 | } |
| 330 | return retval; |
| 331 | } |
| 332 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 333 | static int uinput_allocate_device(struct uinput_device *udev) |
| 334 | { |
| 335 | udev->dev = input_allocate_device(); |
| 336 | if (!udev->dev) |
| 337 | return -ENOMEM; |
| 338 | |
| 339 | udev->dev->event = uinput_dev_event; |
Dmitry Torokhov | 373f971 | 2007-04-12 01:34:33 -0400 | [diff] [blame] | 340 | input_set_drvdata(udev->dev, udev); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 341 | |
| 342 | return 0; |
| 343 | } |
| 344 | |
| 345 | static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | { |
| 347 | struct uinput_user_dev *user_dev; |
| 348 | struct input_dev *dev; |
Dmitry Torokhov | 5b6271b | 2005-06-30 00:50:38 -0500 | [diff] [blame] | 349 | char *name; |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 350 | int i, size; |
Dmitry Torokhov | 152c12f | 2005-06-30 00:47:50 -0500 | [diff] [blame] | 351 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 353 | if (count != sizeof(struct uinput_user_dev)) |
| 354 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 356 | if (!udev->dev) { |
| 357 | retval = uinput_allocate_device(udev); |
| 358 | if (retval) |
| 359 | return retval; |
| 360 | } |
| 361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | dev = udev->dev; |
| 363 | |
Dmitry Torokhov | 152c12f | 2005-06-30 00:47:50 -0500 | [diff] [blame] | 364 | user_dev = kmalloc(sizeof(struct uinput_user_dev), GFP_KERNEL); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 365 | if (!user_dev) |
| 366 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
| 368 | if (copy_from_user(user_dev, buffer, sizeof(struct uinput_user_dev))) { |
| 369 | retval = -EFAULT; |
| 370 | goto exit; |
| 371 | } |
| 372 | |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 373 | udev->ff_effects_max = user_dev->ff_effects_max; |
| 374 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1; |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 376 | if (!size) { |
| 377 | retval = -EINVAL; |
| 378 | goto exit; |
| 379 | } |
| 380 | |
| 381 | kfree(dev->name); |
Dmitry Torokhov | 5b6271b | 2005-06-30 00:50:38 -0500 | [diff] [blame] | 382 | dev->name = name = kmalloc(size, GFP_KERNEL); |
| 383 | if (!name) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | retval = -ENOMEM; |
| 385 | goto exit; |
| 386 | } |
Dmitry Torokhov | 5b6271b | 2005-06-30 00:50:38 -0500 | [diff] [blame] | 387 | strlcpy(name, user_dev->name, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | dev->id.bustype = user_dev->id.bustype; |
| 390 | dev->id.vendor = user_dev->id.vendor; |
| 391 | dev->id.product = user_dev->id.product; |
| 392 | dev->id.version = user_dev->id.version; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 394 | for (i = 0; i < ABS_CNT; i++) { |
| 395 | input_abs_set_max(dev, i, user_dev->absmax[i]); |
| 396 | input_abs_set_min(dev, i, user_dev->absmin[i]); |
| 397 | input_abs_set_fuzz(dev, i, user_dev->absfuzz[i]); |
| 398 | input_abs_set_flat(dev, i, user_dev->absflat[i]); |
| 399 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
| 401 | /* check if absmin/absmax/absfuzz/absflat are filled as |
| 402 | * told in Documentation/input/input-programming.txt */ |
| 403 | if (test_bit(EV_ABS, dev->evbit)) { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 404 | retval = uinput_validate_absbits(dev); |
| 405 | if (retval < 0) |
| 406 | goto exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | } |
| 408 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 409 | udev->state = UIST_SETUP_COMPLETE; |
| 410 | retval = count; |
| 411 | |
| 412 | exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | kfree(user_dev); |
| 414 | return retval; |
| 415 | } |
| 416 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 417 | static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count) |
| 418 | { |
| 419 | struct input_event ev; |
| 420 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 421 | if (count < input_event_size()) |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 422 | return -EINVAL; |
| 423 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 424 | if (input_event_from_user(buffer, &ev)) |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 425 | return -EFAULT; |
| 426 | |
| 427 | input_event(udev->dev, ev.type, ev.code, ev.value); |
| 428 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 429 | return input_event_size(); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 430 | } |
| 431 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) |
| 433 | { |
| 434 | struct uinput_device *udev = file->private_data; |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 435 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | |
Dmitry Torokhov | 221979a | 2006-02-19 00:22:36 -0500 | [diff] [blame] | 437 | retval = mutex_lock_interruptible(&udev->mutex); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 438 | if (retval) |
| 439 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 441 | retval = udev->state == UIST_CREATED ? |
| 442 | uinput_inject_event(udev, buffer, count) : |
| 443 | uinput_setup_device(udev, buffer, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
Dmitry Torokhov | 221979a | 2006-02-19 00:22:36 -0500 | [diff] [blame] | 445 | mutex_unlock(&udev->mutex); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 446 | |
| 447 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | } |
| 449 | |
| 450 | static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) |
| 451 | { |
| 452 | struct uinput_device *udev = file->private_data; |
| 453 | int retval = 0; |
| 454 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 455 | if (udev->state != UIST_CREATED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | return -ENODEV; |
| 457 | |
Dmitry Torokhov | 152c12f | 2005-06-30 00:47:50 -0500 | [diff] [blame] | 458 | if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | return -EAGAIN; |
| 460 | |
| 461 | retval = wait_event_interruptible(udev->waitq, |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 462 | udev->head != udev->tail || udev->state != UIST_CREATED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | if (retval) |
| 464 | return retval; |
| 465 | |
Dmitry Torokhov | 221979a | 2006-02-19 00:22:36 -0500 | [diff] [blame] | 466 | retval = mutex_lock_interruptible(&udev->mutex); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 467 | if (retval) |
| 468 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 470 | if (udev->state != UIST_CREATED) { |
| 471 | retval = -ENODEV; |
| 472 | goto out; |
| 473 | } |
| 474 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 475 | while (udev->head != udev->tail && retval + input_event_size() <= count) { |
| 476 | if (input_event_to_user(buffer + retval, &udev->buff[udev->tail])) { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 477 | retval = -EFAULT; |
| 478 | goto out; |
| 479 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE; |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 481 | retval += input_event_size(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | } |
| 483 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 484 | out: |
Dmitry Torokhov | 221979a | 2006-02-19 00:22:36 -0500 | [diff] [blame] | 485 | mutex_unlock(&udev->mutex); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 486 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | return retval; |
| 488 | } |
| 489 | |
| 490 | static unsigned int uinput_poll(struct file *file, poll_table *wait) |
| 491 | { |
| 492 | struct uinput_device *udev = file->private_data; |
| 493 | |
| 494 | poll_wait(file, &udev->waitq, wait); |
| 495 | |
| 496 | if (udev->head != udev->tail) |
| 497 | return POLLIN | POLLRDNORM; |
| 498 | |
| 499 | return 0; |
| 500 | } |
| 501 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 502 | static int uinput_release(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 504 | struct uinput_device *udev = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 506 | uinput_destroy_device(udev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | kfree(udev); |
| 508 | |
| 509 | return 0; |
| 510 | } |
| 511 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 512 | #ifdef CONFIG_COMPAT |
| 513 | struct uinput_ff_upload_compat { |
| 514 | int request_id; |
| 515 | int retval; |
| 516 | struct ff_effect_compat effect; |
| 517 | struct ff_effect_compat old; |
| 518 | }; |
| 519 | |
| 520 | static int uinput_ff_upload_to_user(char __user *buffer, |
| 521 | const struct uinput_ff_upload *ff_up) |
| 522 | { |
| 523 | if (INPUT_COMPAT_TEST) { |
| 524 | struct uinput_ff_upload_compat ff_up_compat; |
| 525 | |
| 526 | ff_up_compat.request_id = ff_up->request_id; |
| 527 | ff_up_compat.retval = ff_up->retval; |
| 528 | /* |
| 529 | * It so happens that the pointer that gives us the trouble |
| 530 | * is the last field in the structure. Since we don't support |
| 531 | * custom waveforms in uinput anyway we can just copy the whole |
| 532 | * thing (to the compat size) and ignore the pointer. |
| 533 | */ |
| 534 | memcpy(&ff_up_compat.effect, &ff_up->effect, |
| 535 | sizeof(struct ff_effect_compat)); |
| 536 | memcpy(&ff_up_compat.old, &ff_up->old, |
| 537 | sizeof(struct ff_effect_compat)); |
| 538 | |
| 539 | if (copy_to_user(buffer, &ff_up_compat, |
| 540 | sizeof(struct uinput_ff_upload_compat))) |
| 541 | return -EFAULT; |
| 542 | } else { |
| 543 | if (copy_to_user(buffer, ff_up, |
| 544 | sizeof(struct uinput_ff_upload))) |
| 545 | return -EFAULT; |
| 546 | } |
| 547 | |
| 548 | return 0; |
| 549 | } |
| 550 | |
| 551 | static int uinput_ff_upload_from_user(const char __user *buffer, |
| 552 | struct uinput_ff_upload *ff_up) |
| 553 | { |
| 554 | if (INPUT_COMPAT_TEST) { |
| 555 | struct uinput_ff_upload_compat ff_up_compat; |
| 556 | |
| 557 | if (copy_from_user(&ff_up_compat, buffer, |
| 558 | sizeof(struct uinput_ff_upload_compat))) |
| 559 | return -EFAULT; |
| 560 | |
| 561 | ff_up->request_id = ff_up_compat.request_id; |
| 562 | ff_up->retval = ff_up_compat.retval; |
| 563 | memcpy(&ff_up->effect, &ff_up_compat.effect, |
| 564 | sizeof(struct ff_effect_compat)); |
| 565 | memcpy(&ff_up->old, &ff_up_compat.old, |
| 566 | sizeof(struct ff_effect_compat)); |
| 567 | |
| 568 | } else { |
| 569 | if (copy_from_user(ff_up, buffer, |
| 570 | sizeof(struct uinput_ff_upload))) |
| 571 | return -EFAULT; |
| 572 | } |
| 573 | |
| 574 | return 0; |
| 575 | } |
| 576 | |
| 577 | #else |
| 578 | |
| 579 | static int uinput_ff_upload_to_user(char __user *buffer, |
| 580 | const struct uinput_ff_upload *ff_up) |
| 581 | { |
| 582 | if (copy_to_user(buffer, ff_up, sizeof(struct uinput_ff_upload))) |
| 583 | return -EFAULT; |
| 584 | |
| 585 | return 0; |
| 586 | } |
| 587 | |
| 588 | static int uinput_ff_upload_from_user(const char __user *buffer, |
| 589 | struct uinput_ff_upload *ff_up) |
| 590 | { |
| 591 | if (copy_from_user(ff_up, buffer, sizeof(struct uinput_ff_upload))) |
| 592 | return -EFAULT; |
| 593 | |
| 594 | return 0; |
| 595 | } |
| 596 | |
| 597 | #endif |
| 598 | |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 599 | #define uinput_set_bit(_arg, _bit, _max) \ |
| 600 | ({ \ |
| 601 | int __ret = 0; \ |
| 602 | if (udev->state == UIST_CREATED) \ |
| 603 | __ret = -EINVAL; \ |
| 604 | else if ((_arg) > (_max)) \ |
| 605 | __ret = -EINVAL; \ |
| 606 | else set_bit((_arg), udev->dev->_bit); \ |
| 607 | __ret; \ |
| 608 | }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 610 | static long uinput_ioctl_handler(struct file *file, unsigned int cmd, |
| 611 | unsigned long arg, void __user *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 613 | int retval; |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 614 | struct uinput_device *udev = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | struct uinput_ff_upload ff_up; |
| 616 | struct uinput_ff_erase ff_erase; |
| 617 | struct uinput_request *req; |
| 618 | int length; |
Dmitry Torokhov | 5b6271b | 2005-06-30 00:50:38 -0500 | [diff] [blame] | 619 | char *phys; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | |
Dmitry Torokhov | 221979a | 2006-02-19 00:22:36 -0500 | [diff] [blame] | 621 | retval = mutex_lock_interruptible(&udev->mutex); |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 622 | if (retval) |
| 623 | return retval; |
| 624 | |
| 625 | if (!udev->dev) { |
| 626 | retval = uinput_allocate_device(udev); |
| 627 | if (retval) |
| 628 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | switch (cmd) { |
| 632 | case UI_DEV_CREATE: |
| 633 | retval = uinput_create_device(udev); |
| 634 | break; |
| 635 | |
| 636 | case UI_DEV_DESTROY: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 637 | uinput_destroy_device(udev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | break; |
| 639 | |
| 640 | case UI_SET_EVBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 641 | retval = uinput_set_bit(arg, evbit, EV_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | break; |
| 643 | |
| 644 | case UI_SET_KEYBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 645 | retval = uinput_set_bit(arg, keybit, KEY_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | break; |
| 647 | |
| 648 | case UI_SET_RELBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 649 | retval = uinput_set_bit(arg, relbit, REL_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | break; |
| 651 | |
| 652 | case UI_SET_ABSBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 653 | retval = uinput_set_bit(arg, absbit, ABS_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | break; |
| 655 | |
| 656 | case UI_SET_MSCBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 657 | retval = uinput_set_bit(arg, mscbit, MSC_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | break; |
| 659 | |
| 660 | case UI_SET_LEDBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 661 | retval = uinput_set_bit(arg, ledbit, LED_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | break; |
| 663 | |
| 664 | case UI_SET_SNDBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 665 | retval = uinput_set_bit(arg, sndbit, SND_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | break; |
| 667 | |
| 668 | case UI_SET_FFBIT: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 669 | retval = uinput_set_bit(arg, ffbit, FF_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | break; |
| 671 | |
Dmitry Torokhov | 59c7c03 | 2005-11-20 00:51:33 -0500 | [diff] [blame] | 672 | case UI_SET_SWBIT: |
| 673 | retval = uinput_set_bit(arg, swbit, SW_MAX); |
| 674 | break; |
| 675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | case UI_SET_PHYS: |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 677 | if (udev->state == UIST_CREATED) { |
| 678 | retval = -EINVAL; |
| 679 | goto out; |
| 680 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | length = strnlen_user(p, 1024); |
| 682 | if (length <= 0) { |
| 683 | retval = -EFAULT; |
| 684 | break; |
| 685 | } |
Dmitry Torokhov | 5b6271b | 2005-06-30 00:50:38 -0500 | [diff] [blame] | 686 | kfree(udev->dev->phys); |
| 687 | udev->dev->phys = phys = kmalloc(length, GFP_KERNEL); |
| 688 | if (!phys) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | retval = -ENOMEM; |
| 690 | break; |
| 691 | } |
Dmitry Torokhov | 5b6271b | 2005-06-30 00:50:38 -0500 | [diff] [blame] | 692 | if (copy_from_user(phys, p, length)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | udev->dev->phys = NULL; |
Dmitry Torokhov | 5b6271b | 2005-06-30 00:50:38 -0500 | [diff] [blame] | 694 | kfree(phys); |
| 695 | retval = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | break; |
| 697 | } |
Dmitry Torokhov | 5b6271b | 2005-06-30 00:50:38 -0500 | [diff] [blame] | 698 | phys[length - 1] = '\0'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | break; |
| 700 | |
| 701 | case UI_BEGIN_FF_UPLOAD: |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 702 | retval = uinput_ff_upload_from_user(p, &ff_up); |
| 703 | if (retval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | break; |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 705 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | req = uinput_request_find(udev, ff_up.request_id); |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 707 | if (!req || req->code != UI_FF_UPLOAD || !req->u.upload.effect) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | retval = -EINVAL; |
| 709 | break; |
| 710 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 711 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | ff_up.retval = 0; |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 713 | ff_up.effect = *req->u.upload.effect; |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 714 | if (req->u.upload.old) |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 715 | ff_up.old = *req->u.upload.old; |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 716 | else |
| 717 | memset(&ff_up.old, 0, sizeof(struct ff_effect)); |
| 718 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 719 | retval = uinput_ff_upload_to_user(p, &ff_up); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | break; |
| 721 | |
| 722 | case UI_BEGIN_FF_ERASE: |
| 723 | if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { |
| 724 | retval = -EFAULT; |
| 725 | break; |
| 726 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 727 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | req = uinput_request_find(udev, ff_erase.request_id); |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 729 | if (!req || req->code != UI_FF_ERASE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | retval = -EINVAL; |
| 731 | break; |
| 732 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 733 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | ff_erase.retval = 0; |
| 735 | ff_erase.effect_id = req->u.effect_id; |
| 736 | if (copy_to_user(p, &ff_erase, sizeof(ff_erase))) { |
| 737 | retval = -EFAULT; |
| 738 | break; |
| 739 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 740 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | break; |
| 742 | |
| 743 | case UI_END_FF_UPLOAD: |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 744 | retval = uinput_ff_upload_from_user(p, &ff_up); |
| 745 | if (retval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | break; |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 747 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | req = uinput_request_find(udev, ff_up.request_id); |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 749 | if (!req || req->code != UI_FF_UPLOAD || |
| 750 | !req->u.upload.effect) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | retval = -EINVAL; |
| 752 | break; |
| 753 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 754 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | req->retval = ff_up.retval; |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 756 | uinput_request_done(udev, req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | break; |
| 758 | |
| 759 | case UI_END_FF_ERASE: |
| 760 | if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) { |
| 761 | retval = -EFAULT; |
| 762 | break; |
| 763 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 764 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | req = uinput_request_find(udev, ff_erase.request_id); |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 766 | if (!req || req->code != UI_FF_ERASE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | retval = -EINVAL; |
| 768 | break; |
| 769 | } |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 770 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | req->retval = ff_erase.retval; |
Dmitry Torokhov | 0048e60 | 2005-06-30 00:48:14 -0500 | [diff] [blame] | 772 | uinput_request_done(udev, req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | break; |
| 774 | |
| 775 | default: |
| 776 | retval = -EINVAL; |
| 777 | } |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 778 | |
| 779 | out: |
Dmitry Torokhov | 221979a | 2006-02-19 00:22:36 -0500 | [diff] [blame] | 780 | mutex_unlock(&udev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | return retval; |
| 782 | } |
| 783 | |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 784 | static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 785 | { |
| 786 | return uinput_ioctl_handler(file, cmd, arg, (void __user *)arg); |
| 787 | } |
| 788 | |
| 789 | #ifdef CONFIG_COMPAT |
| 790 | static long uinput_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 791 | { |
| 792 | return uinput_ioctl_handler(file, cmd, arg, compat_ptr(arg)); |
| 793 | } |
| 794 | #endif |
| 795 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 796 | static const struct file_operations uinput_fops = { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 797 | .owner = THIS_MODULE, |
| 798 | .open = uinput_open, |
| 799 | .release = uinput_release, |
| 800 | .read = uinput_read, |
| 801 | .write = uinput_write, |
| 802 | .poll = uinput_poll, |
| 803 | .unlocked_ioctl = uinput_ioctl, |
Philip Langdale | 2d56f3a | 2008-10-16 22:31:42 -0400 | [diff] [blame] | 804 | #ifdef CONFIG_COMPAT |
| 805 | .compat_ioctl = uinput_compat_ioctl, |
| 806 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | }; |
| 808 | |
| 809 | static struct miscdevice uinput_misc = { |
Dmitry Torokhov | 2950641 | 2005-11-20 00:51:22 -0500 | [diff] [blame] | 810 | .fops = &uinput_fops, |
| 811 | .minor = UINPUT_MINOR, |
| 812 | .name = UINPUT_NAME, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | }; |
Kay Sievers | 8905aaa | 2010-08-19 09:52:28 -0700 | [diff] [blame] | 814 | MODULE_ALIAS_MISCDEV(UINPUT_MINOR); |
| 815 | MODULE_ALIAS("devname:" UINPUT_NAME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
| 817 | static int __init uinput_init(void) |
| 818 | { |
| 819 | return misc_register(&uinput_misc); |
| 820 | } |
| 821 | |
| 822 | static void __exit uinput_exit(void) |
| 823 | { |
| 824 | misc_deregister(&uinput_misc); |
| 825 | } |
| 826 | |
| 827 | MODULE_AUTHOR("Aristeu Sergio Rozanski Filho"); |
| 828 | MODULE_DESCRIPTION("User level driver support for input subsystem"); |
| 829 | MODULE_LICENSE("GPL"); |
Anssi Hannula | ff46255 | 2006-07-19 01:41:09 -0400 | [diff] [blame] | 830 | MODULE_VERSION("0.3"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | |
| 832 | module_init(uinput_init); |
| 833 | module_exit(uinput_exit); |
| 834 | |