Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * The input core |
| 3 | * |
| 4 | * Copyright (c) 1999-2002 Vojtech Pavlik |
| 5 | */ |
| 6 | |
| 7 | /* |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License version 2 as published by |
| 10 | * the Free Software Foundation. |
| 11 | */ |
| 12 | |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 13 | #define pr_fmt(fmt) KBUILD_BASENAME ": " fmt |
| 14 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/init.h> |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 16 | #include <linux/types.h> |
Henrik Rydberg | 47c78e8 | 2010-11-27 09:16:48 +0100 | [diff] [blame] | 17 | #include <linux/input/mt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/random.h> |
| 21 | #include <linux/major.h> |
| 22 | #include <linux/proc_fs.h> |
Alexey Dobriyan | a99bbaf | 2009-10-04 16:11:37 +0400 | [diff] [blame] | 23 | #include <linux/sched.h> |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 24 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/poll.h> |
| 26 | #include <linux/device.h> |
Jes Sorensen | e676c23 | 2006-02-19 00:21:46 -0500 | [diff] [blame] | 27 | #include <linux/mutex.h> |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 28 | #include <linux/rcupdate.h> |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 29 | #include "input-compat.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
| 31 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); |
| 32 | MODULE_DESCRIPTION("Input core"); |
| 33 | MODULE_LICENSE("GPL"); |
| 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #define INPUT_DEVICES 256 |
| 36 | |
| 37 | static LIST_HEAD(input_dev_list); |
| 38 | static LIST_HEAD(input_handler_list); |
| 39 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 40 | /* |
| 41 | * input_mutex protects access to both input_dev_list and input_handler_list. |
| 42 | * This also causes input_[un]register_device and input_[un]register_handler |
| 43 | * be mutually exclusive which simplifies locking in drivers implementing |
| 44 | * input handlers. |
| 45 | */ |
| 46 | static DEFINE_MUTEX(input_mutex); |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | static struct input_handler *input_table[8]; |
| 49 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 50 | static inline int is_event_supported(unsigned int code, |
| 51 | unsigned long *bm, unsigned int max) |
| 52 | { |
| 53 | return code <= max && test_bit(code, bm); |
| 54 | } |
| 55 | |
| 56 | static int input_defuzz_abs_event(int value, int old_val, int fuzz) |
| 57 | { |
| 58 | if (fuzz) { |
| 59 | if (value > old_val - fuzz / 2 && value < old_val + fuzz / 2) |
| 60 | return old_val; |
| 61 | |
| 62 | if (value > old_val - fuzz && value < old_val + fuzz) |
| 63 | return (old_val * 3 + value) / 4; |
| 64 | |
| 65 | if (value > old_val - fuzz * 2 && value < old_val + fuzz * 2) |
| 66 | return (old_val + value) / 2; |
| 67 | } |
| 68 | |
| 69 | return value; |
| 70 | } |
| 71 | |
| 72 | /* |
Dmitry Torokhov | ef7995f | 2010-01-29 23:59:12 -0800 | [diff] [blame] | 73 | * Pass event first through all filters and then, if event has not been |
| 74 | * filtered out, through all open handles. This function is called with |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 75 | * dev->event_lock held and interrupts disabled. |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 76 | */ |
| 77 | static void input_pass_event(struct input_dev *dev, |
| 78 | unsigned int type, unsigned int code, int value) |
| 79 | { |
Dmitry Torokhov | ef7995f | 2010-01-29 23:59:12 -0800 | [diff] [blame] | 80 | struct input_handler *handler; |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 81 | struct input_handle *handle; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 82 | |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 83 | rcu_read_lock(); |
| 84 | |
| 85 | handle = rcu_dereference(dev->grab); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 86 | if (handle) |
| 87 | handle->handler->event(handle, type, code, value); |
Dmitry Torokhov | ef7995f | 2010-01-29 23:59:12 -0800 | [diff] [blame] | 88 | else { |
| 89 | bool filtered = false; |
| 90 | |
| 91 | list_for_each_entry_rcu(handle, &dev->h_list, d_node) { |
| 92 | if (!handle->open) |
| 93 | continue; |
| 94 | |
| 95 | handler = handle->handler; |
| 96 | if (!handler->filter) { |
| 97 | if (filtered) |
| 98 | break; |
| 99 | |
| 100 | handler->event(handle, type, code, value); |
| 101 | |
| 102 | } else if (handler->filter(handle, type, code, value)) |
| 103 | filtered = true; |
| 104 | } |
| 105 | } |
| 106 | |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 107 | rcu_read_unlock(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | /* |
| 111 | * Generate software autorepeat event. Note that we take |
| 112 | * dev->event_lock here to avoid racing with input_event |
| 113 | * which may cause keys get "stuck". |
| 114 | */ |
| 115 | static void input_repeat_key(unsigned long data) |
| 116 | { |
| 117 | struct input_dev *dev = (void *) data; |
| 118 | unsigned long flags; |
| 119 | |
| 120 | spin_lock_irqsave(&dev->event_lock, flags); |
| 121 | |
| 122 | if (test_bit(dev->repeat_key, dev->key) && |
| 123 | is_event_supported(dev->repeat_key, dev->keybit, KEY_MAX)) { |
| 124 | |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 125 | input_pass_event(dev, EV_KEY, dev->repeat_key, 2); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 126 | |
| 127 | if (dev->sync) { |
| 128 | /* |
| 129 | * Only send SYN_REPORT if we are not in a middle |
| 130 | * of driver parsing a new hardware packet. |
| 131 | * Otherwise assume that the driver will send |
| 132 | * SYN_REPORT once it's done. |
| 133 | */ |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 134 | input_pass_event(dev, EV_SYN, SYN_REPORT, 1); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | if (dev->rep[REP_PERIOD]) |
| 138 | mod_timer(&dev->timer, jiffies + |
| 139 | msecs_to_jiffies(dev->rep[REP_PERIOD])); |
| 140 | } |
| 141 | |
| 142 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 143 | } |
| 144 | |
| 145 | static void input_start_autorepeat(struct input_dev *dev, int code) |
| 146 | { |
| 147 | if (test_bit(EV_REP, dev->evbit) && |
| 148 | dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && |
| 149 | dev->timer.data) { |
| 150 | dev->repeat_key = code; |
| 151 | mod_timer(&dev->timer, |
| 152 | jiffies + msecs_to_jiffies(dev->rep[REP_DELAY])); |
| 153 | } |
| 154 | } |
| 155 | |
Johannes Berg | e7b5c1e | 2009-01-29 23:17:52 -0800 | [diff] [blame] | 156 | static void input_stop_autorepeat(struct input_dev *dev) |
| 157 | { |
| 158 | del_timer(&dev->timer); |
| 159 | } |
| 160 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 161 | #define INPUT_IGNORE_EVENT 0 |
| 162 | #define INPUT_PASS_TO_HANDLERS 1 |
| 163 | #define INPUT_PASS_TO_DEVICE 2 |
| 164 | #define INPUT_PASS_TO_ALL (INPUT_PASS_TO_HANDLERS | INPUT_PASS_TO_DEVICE) |
| 165 | |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 166 | static int input_handle_abs_event(struct input_dev *dev, |
| 167 | unsigned int code, int *pval) |
| 168 | { |
| 169 | bool is_mt_event; |
| 170 | int *pold; |
| 171 | |
| 172 | if (code == ABS_MT_SLOT) { |
| 173 | /* |
| 174 | * "Stage" the event; we'll flush it later, when we |
Dmitry Torokhov | 144c0f8 | 2010-09-03 10:31:05 -0700 | [diff] [blame] | 175 | * get actual touch data. |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 176 | */ |
| 177 | if (*pval >= 0 && *pval < dev->mtsize) |
| 178 | dev->slot = *pval; |
| 179 | |
| 180 | return INPUT_IGNORE_EVENT; |
| 181 | } |
| 182 | |
| 183 | is_mt_event = code >= ABS_MT_FIRST && code <= ABS_MT_LAST; |
| 184 | |
| 185 | if (!is_mt_event) { |
Daniel Mack | d31b286 | 2010-08-02 20:18:21 -0700 | [diff] [blame] | 186 | pold = &dev->absinfo[code].value; |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 187 | } else if (dev->mt) { |
| 188 | struct input_mt_slot *mtslot = &dev->mt[dev->slot]; |
| 189 | pold = &mtslot->abs[code - ABS_MT_FIRST]; |
| 190 | } else { |
| 191 | /* |
Dmitry Torokhov | 144c0f8 | 2010-09-03 10:31:05 -0700 | [diff] [blame] | 192 | * Bypass filtering for multi-touch events when |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 193 | * not employing slots. |
| 194 | */ |
| 195 | pold = NULL; |
| 196 | } |
| 197 | |
| 198 | if (pold) { |
| 199 | *pval = input_defuzz_abs_event(*pval, *pold, |
Daniel Mack | d31b286 | 2010-08-02 20:18:21 -0700 | [diff] [blame] | 200 | dev->absinfo[code].fuzz); |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 201 | if (*pold == *pval) |
| 202 | return INPUT_IGNORE_EVENT; |
| 203 | |
| 204 | *pold = *pval; |
| 205 | } |
| 206 | |
| 207 | /* Flush pending "slot" event */ |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 208 | if (is_mt_event && dev->slot != input_abs_get_val(dev, ABS_MT_SLOT)) { |
| 209 | input_abs_set_val(dev, ABS_MT_SLOT, dev->slot); |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 210 | input_pass_event(dev, EV_ABS, ABS_MT_SLOT, dev->slot); |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | return INPUT_PASS_TO_HANDLERS; |
| 214 | } |
| 215 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 216 | static void input_handle_event(struct input_dev *dev, |
| 217 | unsigned int type, unsigned int code, int value) |
| 218 | { |
| 219 | int disposition = INPUT_IGNORE_EVENT; |
| 220 | |
| 221 | switch (type) { |
| 222 | |
| 223 | case EV_SYN: |
| 224 | switch (code) { |
| 225 | case SYN_CONFIG: |
| 226 | disposition = INPUT_PASS_TO_ALL; |
| 227 | break; |
| 228 | |
| 229 | case SYN_REPORT: |
| 230 | if (!dev->sync) { |
Dmitry Torokhov | 20da92d | 2010-07-15 23:27:36 -0700 | [diff] [blame] | 231 | dev->sync = true; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 232 | disposition = INPUT_PASS_TO_HANDLERS; |
| 233 | } |
| 234 | break; |
Henrik Rydberg | 5e5ee68 | 2009-04-28 07:47:33 -0700 | [diff] [blame] | 235 | case SYN_MT_REPORT: |
Dmitry Torokhov | 20da92d | 2010-07-15 23:27:36 -0700 | [diff] [blame] | 236 | dev->sync = false; |
Henrik Rydberg | 5e5ee68 | 2009-04-28 07:47:33 -0700 | [diff] [blame] | 237 | disposition = INPUT_PASS_TO_HANDLERS; |
| 238 | break; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 239 | } |
| 240 | break; |
| 241 | |
| 242 | case EV_KEY: |
| 243 | if (is_event_supported(code, dev->keybit, KEY_MAX) && |
| 244 | !!test_bit(code, dev->key) != value) { |
| 245 | |
| 246 | if (value != 2) { |
| 247 | __change_bit(code, dev->key); |
| 248 | if (value) |
| 249 | input_start_autorepeat(dev, code); |
Johannes Berg | e7b5c1e | 2009-01-29 23:17:52 -0800 | [diff] [blame] | 250 | else |
| 251 | input_stop_autorepeat(dev); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | disposition = INPUT_PASS_TO_HANDLERS; |
| 255 | } |
| 256 | break; |
| 257 | |
| 258 | case EV_SW: |
| 259 | if (is_event_supported(code, dev->swbit, SW_MAX) && |
| 260 | !!test_bit(code, dev->sw) != value) { |
| 261 | |
| 262 | __change_bit(code, dev->sw); |
| 263 | disposition = INPUT_PASS_TO_HANDLERS; |
| 264 | } |
| 265 | break; |
| 266 | |
| 267 | case EV_ABS: |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 268 | if (is_event_supported(code, dev->absbit, ABS_MAX)) |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 269 | disposition = input_handle_abs_event(dev, code, &value); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 270 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 271 | break; |
| 272 | |
| 273 | case EV_REL: |
| 274 | if (is_event_supported(code, dev->relbit, REL_MAX) && value) |
| 275 | disposition = INPUT_PASS_TO_HANDLERS; |
| 276 | |
| 277 | break; |
| 278 | |
| 279 | case EV_MSC: |
| 280 | if (is_event_supported(code, dev->mscbit, MSC_MAX)) |
| 281 | disposition = INPUT_PASS_TO_ALL; |
| 282 | |
| 283 | break; |
| 284 | |
| 285 | case EV_LED: |
| 286 | if (is_event_supported(code, dev->ledbit, LED_MAX) && |
| 287 | !!test_bit(code, dev->led) != value) { |
| 288 | |
| 289 | __change_bit(code, dev->led); |
| 290 | disposition = INPUT_PASS_TO_ALL; |
| 291 | } |
| 292 | break; |
| 293 | |
| 294 | case EV_SND: |
| 295 | if (is_event_supported(code, dev->sndbit, SND_MAX)) { |
| 296 | |
| 297 | if (!!test_bit(code, dev->snd) != !!value) |
| 298 | __change_bit(code, dev->snd); |
| 299 | disposition = INPUT_PASS_TO_ALL; |
| 300 | } |
| 301 | break; |
| 302 | |
| 303 | case EV_REP: |
| 304 | if (code <= REP_MAX && value >= 0 && dev->rep[code] != value) { |
| 305 | dev->rep[code] = value; |
| 306 | disposition = INPUT_PASS_TO_ALL; |
| 307 | } |
| 308 | break; |
| 309 | |
| 310 | case EV_FF: |
| 311 | if (value >= 0) |
| 312 | disposition = INPUT_PASS_TO_ALL; |
| 313 | break; |
Richard Purdie | ed2fa4d | 2008-01-03 10:46:21 -0500 | [diff] [blame] | 314 | |
| 315 | case EV_PWR: |
| 316 | disposition = INPUT_PASS_TO_ALL; |
| 317 | break; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 318 | } |
| 319 | |
Dmitry Torokhov | c981228 | 2008-06-02 01:02:40 -0400 | [diff] [blame] | 320 | if (disposition != INPUT_IGNORE_EVENT && type != EV_SYN) |
Dmitry Torokhov | 20da92d | 2010-07-15 23:27:36 -0700 | [diff] [blame] | 321 | dev->sync = false; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 322 | |
| 323 | if ((disposition & INPUT_PASS_TO_DEVICE) && dev->event) |
| 324 | dev->event(dev, type, code, value); |
| 325 | |
| 326 | if (disposition & INPUT_PASS_TO_HANDLERS) |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 327 | input_pass_event(dev, type, code, value); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 328 | } |
| 329 | |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 330 | /** |
| 331 | * input_event() - report new input event |
Dmitry Torokhov | 1447190 | 2006-11-02 23:26:55 -0500 | [diff] [blame] | 332 | * @dev: device that generated the event |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 333 | * @type: type of the event |
| 334 | * @code: event code |
| 335 | * @value: value of the event |
| 336 | * |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 337 | * This function should be used by drivers implementing various input |
Dmitry Torokhov | df2d463 | 2009-12-11 21:57:31 -0800 | [diff] [blame] | 338 | * devices to report input events. See also input_inject_event(). |
| 339 | * |
| 340 | * NOTE: input_event() may be safely used right after input device was |
| 341 | * allocated with input_allocate_device(), even before it is registered |
| 342 | * with input_register_device(), but the event will not reach any of the |
| 343 | * input handlers. Such early invocation of input_event() may be used |
| 344 | * to 'seed' initial state of a switch or initial position of absolute |
| 345 | * axis, etc. |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 346 | */ |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 347 | void input_event(struct input_dev *dev, |
| 348 | unsigned int type, unsigned int code, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 350 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 352 | if (is_event_supported(type, dev->evbit, EV_MAX)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 354 | spin_lock_irqsave(&dev->event_lock, flags); |
| 355 | add_input_randomness(type, code, value); |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 356 | input_handle_event(dev, type, code, value); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 357 | spin_unlock_irqrestore(&dev->event_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 360 | EXPORT_SYMBOL(input_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 362 | /** |
| 363 | * input_inject_event() - send input event from input handler |
| 364 | * @handle: input handle to send event through |
| 365 | * @type: type of the event |
| 366 | * @code: event code |
| 367 | * @value: value of the event |
| 368 | * |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 369 | * Similar to input_event() but will ignore event if device is |
| 370 | * "grabbed" and handle injecting event is not the one that owns |
| 371 | * the device. |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 372 | */ |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 373 | void input_inject_event(struct input_handle *handle, |
| 374 | unsigned int type, unsigned int code, int value) |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 375 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 376 | struct input_dev *dev = handle->dev; |
| 377 | struct input_handle *grab; |
| 378 | unsigned long flags; |
| 379 | |
| 380 | if (is_event_supported(type, dev->evbit, EV_MAX)) { |
| 381 | spin_lock_irqsave(&dev->event_lock, flags); |
| 382 | |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 383 | rcu_read_lock(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 384 | grab = rcu_dereference(dev->grab); |
| 385 | if (!grab || grab == handle) |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 386 | input_handle_event(dev, type, code, value); |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 387 | rcu_read_unlock(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 388 | |
| 389 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 390 | } |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 391 | } |
| 392 | EXPORT_SYMBOL(input_inject_event); |
| 393 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 394 | /** |
Daniel Mack | d31b286 | 2010-08-02 20:18:21 -0700 | [diff] [blame] | 395 | * input_alloc_absinfo - allocates array of input_absinfo structs |
| 396 | * @dev: the input device emitting absolute events |
| 397 | * |
| 398 | * If the absinfo struct the caller asked for is already allocated, this |
| 399 | * functions will not do anything. |
| 400 | */ |
| 401 | void input_alloc_absinfo(struct input_dev *dev) |
| 402 | { |
| 403 | if (!dev->absinfo) |
| 404 | dev->absinfo = kcalloc(ABS_CNT, sizeof(struct input_absinfo), |
| 405 | GFP_KERNEL); |
| 406 | |
| 407 | WARN(!dev->absinfo, "%s(): kcalloc() failed?\n", __func__); |
| 408 | } |
| 409 | EXPORT_SYMBOL(input_alloc_absinfo); |
| 410 | |
| 411 | void input_set_abs_params(struct input_dev *dev, unsigned int axis, |
| 412 | int min, int max, int fuzz, int flat) |
| 413 | { |
| 414 | struct input_absinfo *absinfo; |
| 415 | |
| 416 | input_alloc_absinfo(dev); |
| 417 | if (!dev->absinfo) |
| 418 | return; |
| 419 | |
| 420 | absinfo = &dev->absinfo[axis]; |
| 421 | absinfo->minimum = min; |
| 422 | absinfo->maximum = max; |
| 423 | absinfo->fuzz = fuzz; |
| 424 | absinfo->flat = flat; |
| 425 | |
| 426 | dev->absbit[BIT_WORD(axis)] |= BIT_MASK(axis); |
| 427 | } |
| 428 | EXPORT_SYMBOL(input_set_abs_params); |
| 429 | |
| 430 | |
| 431 | /** |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 432 | * input_grab_device - grabs device for exclusive use |
| 433 | * @handle: input handle that wants to own the device |
| 434 | * |
| 435 | * When a device is grabbed by an input handle all events generated by |
| 436 | * the device are delivered only to this handle. Also events injected |
| 437 | * by other input handles are ignored while device is grabbed. |
| 438 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | int input_grab_device(struct input_handle *handle) |
| 440 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 441 | struct input_dev *dev = handle->dev; |
| 442 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 444 | retval = mutex_lock_interruptible(&dev->mutex); |
| 445 | if (retval) |
| 446 | return retval; |
| 447 | |
| 448 | if (dev->grab) { |
| 449 | retval = -EBUSY; |
| 450 | goto out; |
| 451 | } |
| 452 | |
| 453 | rcu_assign_pointer(dev->grab, handle); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 454 | |
| 455 | out: |
| 456 | mutex_unlock(&dev->mutex); |
| 457 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 459 | EXPORT_SYMBOL(input_grab_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 461 | static void __input_release_device(struct input_handle *handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | { |
Andrew Morton | a2b2ed2 | 2006-07-15 01:17:38 -0400 | [diff] [blame] | 463 | struct input_dev *dev = handle->dev; |
Dmitry Torokhov | c7e8dc6 | 2006-07-06 00:21:03 -0400 | [diff] [blame] | 464 | |
Andrew Morton | a2b2ed2 | 2006-07-15 01:17:38 -0400 | [diff] [blame] | 465 | if (dev->grab == handle) { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 466 | rcu_assign_pointer(dev->grab, NULL); |
| 467 | /* Make sure input_pass_event() notices that grab is gone */ |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 468 | synchronize_rcu(); |
Andrew Morton | a2b2ed2 | 2006-07-15 01:17:38 -0400 | [diff] [blame] | 469 | |
| 470 | list_for_each_entry(handle, &dev->h_list, d_node) |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 471 | if (handle->open && handle->handler->start) |
Dmitry Torokhov | c7e8dc6 | 2006-07-06 00:21:03 -0400 | [diff] [blame] | 472 | handle->handler->start(handle); |
| 473 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | } |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 475 | |
| 476 | /** |
| 477 | * input_release_device - release previously grabbed device |
| 478 | * @handle: input handle that owns the device |
| 479 | * |
| 480 | * Releases previously grabbed device so that other input handles can |
| 481 | * start receiving input events. Upon release all handlers attached |
| 482 | * to the device have their start() method called so they have a change |
| 483 | * to synchronize device state with the rest of the system. |
| 484 | */ |
| 485 | void input_release_device(struct input_handle *handle) |
| 486 | { |
| 487 | struct input_dev *dev = handle->dev; |
| 488 | |
| 489 | mutex_lock(&dev->mutex); |
| 490 | __input_release_device(handle); |
| 491 | mutex_unlock(&dev->mutex); |
| 492 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 493 | EXPORT_SYMBOL(input_release_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 495 | /** |
| 496 | * input_open_device - open input device |
| 497 | * @handle: handle through which device is being accessed |
| 498 | * |
| 499 | * This function should be called by input handlers when they |
| 500 | * want to start receive events from given input device. |
| 501 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | int input_open_device(struct input_handle *handle) |
| 503 | { |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 504 | struct input_dev *dev = handle->dev; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 505 | int retval; |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 506 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 507 | retval = mutex_lock_interruptible(&dev->mutex); |
| 508 | if (retval) |
| 509 | return retval; |
| 510 | |
| 511 | if (dev->going_away) { |
| 512 | retval = -ENODEV; |
| 513 | goto out; |
| 514 | } |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 515 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | handle->open++; |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 517 | |
| 518 | if (!dev->users++ && dev->open) |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 519 | retval = dev->open(dev); |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 520 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 521 | if (retval) { |
| 522 | dev->users--; |
| 523 | if (!--handle->open) { |
| 524 | /* |
| 525 | * Make sure we are not delivering any more events |
| 526 | * through this handle |
| 527 | */ |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 528 | synchronize_rcu(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 529 | } |
| 530 | } |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 531 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 532 | out: |
Jes Sorensen | e676c23 | 2006-02-19 00:21:46 -0500 | [diff] [blame] | 533 | mutex_unlock(&dev->mutex); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 534 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 536 | EXPORT_SYMBOL(input_open_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 538 | int input_flush_device(struct input_handle *handle, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 540 | struct input_dev *dev = handle->dev; |
| 541 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 543 | retval = mutex_lock_interruptible(&dev->mutex); |
| 544 | if (retval) |
| 545 | return retval; |
| 546 | |
| 547 | if (dev->flush) |
| 548 | retval = dev->flush(dev, file); |
| 549 | |
| 550 | mutex_unlock(&dev->mutex); |
| 551 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 553 | EXPORT_SYMBOL(input_flush_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 555 | /** |
| 556 | * input_close_device - close input device |
| 557 | * @handle: handle through which device is being accessed |
| 558 | * |
| 559 | * This function should be called by input handlers when they |
| 560 | * want to stop receive events from given input device. |
| 561 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | void input_close_device(struct input_handle *handle) |
| 563 | { |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 564 | struct input_dev *dev = handle->dev; |
| 565 | |
Jes Sorensen | e676c23 | 2006-02-19 00:21:46 -0500 | [diff] [blame] | 566 | mutex_lock(&dev->mutex); |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 567 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 568 | __input_release_device(handle); |
| 569 | |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 570 | if (!--dev->users && dev->close) |
| 571 | dev->close(dev); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 572 | |
| 573 | if (!--handle->open) { |
| 574 | /* |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 575 | * synchronize_rcu() makes sure that input_pass_event() |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 576 | * completed and that no more input events are delivered |
| 577 | * through this handle |
| 578 | */ |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 579 | synchronize_rcu(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 580 | } |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 581 | |
Jes Sorensen | e676c23 | 2006-02-19 00:21:46 -0500 | [diff] [blame] | 582 | mutex_unlock(&dev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 584 | EXPORT_SYMBOL(input_close_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 586 | /* |
Oliver Neukum | 866d7d7 | 2010-07-01 09:01:50 -0700 | [diff] [blame] | 587 | * Simulate keyup events for all keys that are marked as pressed. |
| 588 | * The function must be called with dev->event_lock held. |
| 589 | */ |
| 590 | static void input_dev_release_keys(struct input_dev *dev) |
| 591 | { |
| 592 | int code; |
| 593 | |
| 594 | if (is_event_supported(EV_KEY, dev->evbit, EV_MAX)) { |
| 595 | for (code = 0; code <= KEY_MAX; code++) { |
| 596 | if (is_event_supported(code, dev->keybit, KEY_MAX) && |
| 597 | __test_and_clear_bit(code, dev->key)) { |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 598 | input_pass_event(dev, EV_KEY, code, 0); |
Oliver Neukum | 866d7d7 | 2010-07-01 09:01:50 -0700 | [diff] [blame] | 599 | } |
| 600 | } |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 601 | input_pass_event(dev, EV_SYN, SYN_REPORT, 1); |
Oliver Neukum | 866d7d7 | 2010-07-01 09:01:50 -0700 | [diff] [blame] | 602 | } |
| 603 | } |
| 604 | |
| 605 | /* |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 606 | * Prepare device for unregistering |
| 607 | */ |
| 608 | static void input_disconnect_device(struct input_dev *dev) |
| 609 | { |
| 610 | struct input_handle *handle; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 611 | |
| 612 | /* |
| 613 | * Mark device as going away. Note that we take dev->mutex here |
| 614 | * not to protect access to dev->going_away but rather to ensure |
| 615 | * that there are no threads in the middle of input_open_device() |
| 616 | */ |
| 617 | mutex_lock(&dev->mutex); |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 618 | dev->going_away = true; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 619 | mutex_unlock(&dev->mutex); |
| 620 | |
| 621 | spin_lock_irq(&dev->event_lock); |
| 622 | |
| 623 | /* |
| 624 | * Simulate keyup events for all pressed keys so that handlers |
| 625 | * are not left with "stuck" keys. The driver may continue |
| 626 | * generate events even after we done here but they will not |
| 627 | * reach any handlers. |
| 628 | */ |
Oliver Neukum | 866d7d7 | 2010-07-01 09:01:50 -0700 | [diff] [blame] | 629 | input_dev_release_keys(dev); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 630 | |
| 631 | list_for_each_entry(handle, &dev->h_list, d_node) |
| 632 | handle->open = 0; |
| 633 | |
| 634 | spin_unlock_irq(&dev->event_lock); |
| 635 | } |
| 636 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 637 | /** |
| 638 | * input_scancode_to_scalar() - converts scancode in &struct input_keymap_entry |
| 639 | * @ke: keymap entry containing scancode to be converted. |
| 640 | * @scancode: pointer to the location where converted scancode should |
| 641 | * be stored. |
| 642 | * |
| 643 | * This function is used to convert scancode stored in &struct keymap_entry |
| 644 | * into scalar form understood by legacy keymap handling methods. These |
| 645 | * methods expect scancodes to be represented as 'unsigned int'. |
| 646 | */ |
| 647 | int input_scancode_to_scalar(const struct input_keymap_entry *ke, |
| 648 | unsigned int *scancode) |
| 649 | { |
| 650 | switch (ke->len) { |
| 651 | case 1: |
| 652 | *scancode = *((u8 *)ke->scancode); |
| 653 | break; |
| 654 | |
| 655 | case 2: |
| 656 | *scancode = *((u16 *)ke->scancode); |
| 657 | break; |
| 658 | |
| 659 | case 4: |
| 660 | *scancode = *((u32 *)ke->scancode); |
| 661 | break; |
| 662 | |
| 663 | default: |
| 664 | return -EINVAL; |
| 665 | } |
| 666 | |
| 667 | return 0; |
| 668 | } |
| 669 | EXPORT_SYMBOL(input_scancode_to_scalar); |
| 670 | |
| 671 | /* |
| 672 | * Those routines handle the default case where no [gs]etkeycode() is |
| 673 | * defined. In this case, an array indexed by the scancode is used. |
| 674 | */ |
| 675 | |
| 676 | static unsigned int input_fetch_keycode(struct input_dev *dev, |
| 677 | unsigned int index) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 678 | { |
| 679 | switch (dev->keycodesize) { |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 680 | case 1: |
| 681 | return ((u8 *)dev->keycode)[index]; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 682 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 683 | case 2: |
| 684 | return ((u16 *)dev->keycode)[index]; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 685 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 686 | default: |
| 687 | return ((u32 *)dev->keycode)[index]; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 688 | } |
| 689 | } |
| 690 | |
| 691 | static int input_default_getkeycode(struct input_dev *dev, |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 692 | struct input_keymap_entry *ke) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 693 | { |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 694 | unsigned int index; |
| 695 | int error; |
| 696 | |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 697 | if (!dev->keycodesize) |
| 698 | return -EINVAL; |
| 699 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 700 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) |
| 701 | index = ke->index; |
| 702 | else { |
| 703 | error = input_scancode_to_scalar(ke, &index); |
| 704 | if (error) |
| 705 | return error; |
| 706 | } |
| 707 | |
| 708 | if (index >= dev->keycodemax) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 709 | return -EINVAL; |
| 710 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 711 | ke->keycode = input_fetch_keycode(dev, index); |
| 712 | ke->index = index; |
| 713 | ke->len = sizeof(index); |
| 714 | memcpy(ke->scancode, &index, sizeof(index)); |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 715 | |
| 716 | return 0; |
| 717 | } |
| 718 | |
| 719 | static int input_default_setkeycode(struct input_dev *dev, |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 720 | const struct input_keymap_entry *ke, |
| 721 | unsigned int *old_keycode) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 722 | { |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 723 | unsigned int index; |
| 724 | int error; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 725 | int i; |
| 726 | |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 727 | if (!dev->keycodesize) |
| 728 | return -EINVAL; |
| 729 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 730 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { |
| 731 | index = ke->index; |
| 732 | } else { |
| 733 | error = input_scancode_to_scalar(ke, &index); |
| 734 | if (error) |
| 735 | return error; |
| 736 | } |
| 737 | |
| 738 | if (index >= dev->keycodemax) |
| 739 | return -EINVAL; |
| 740 | |
Mattia Dongili | de391d1 | 2010-11-18 09:06:43 -0800 | [diff] [blame] | 741 | if (dev->keycodesize < sizeof(ke->keycode) && |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 742 | (ke->keycode >> (dev->keycodesize * 8))) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 743 | return -EINVAL; |
| 744 | |
| 745 | switch (dev->keycodesize) { |
| 746 | case 1: { |
| 747 | u8 *k = (u8 *)dev->keycode; |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 748 | *old_keycode = k[index]; |
| 749 | k[index] = ke->keycode; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 750 | break; |
| 751 | } |
| 752 | case 2: { |
| 753 | u16 *k = (u16 *)dev->keycode; |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 754 | *old_keycode = k[index]; |
| 755 | k[index] = ke->keycode; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 756 | break; |
| 757 | } |
| 758 | default: { |
| 759 | u32 *k = (u32 *)dev->keycode; |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 760 | *old_keycode = k[index]; |
| 761 | k[index] = ke->keycode; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 762 | break; |
| 763 | } |
| 764 | } |
| 765 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 766 | __clear_bit(*old_keycode, dev->keybit); |
| 767 | __set_bit(ke->keycode, dev->keybit); |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 768 | |
| 769 | for (i = 0; i < dev->keycodemax; i++) { |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 770 | if (input_fetch_keycode(dev, i) == *old_keycode) { |
| 771 | __set_bit(*old_keycode, dev->keybit); |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 772 | break; /* Setting the bit twice is useless, so break */ |
| 773 | } |
| 774 | } |
| 775 | |
| 776 | return 0; |
| 777 | } |
| 778 | |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 779 | /** |
| 780 | * input_get_keycode - retrieve keycode currently mapped to a given scancode |
| 781 | * @dev: input device which keymap is being queried |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 782 | * @ke: keymap entry |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 783 | * |
| 784 | * This function should be called by anyone interested in retrieving current |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 785 | * keymap. Presently evdev handlers use it. |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 786 | */ |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 787 | int input_get_keycode(struct input_dev *dev, struct input_keymap_entry *ke) |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 788 | { |
Dmitry Torokhov | 2e2e3b9 | 2010-03-21 22:56:15 -0700 | [diff] [blame] | 789 | unsigned long flags; |
| 790 | int retval; |
| 791 | |
| 792 | spin_lock_irqsave(&dev->event_lock, flags); |
Dmitry Torokhov | aebd636 | 2011-01-31 21:06:39 -0800 | [diff] [blame] | 793 | retval = dev->getkeycode(dev, ke); |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 794 | spin_unlock_irqrestore(&dev->event_lock, flags); |
Dmitry Torokhov | aebd636 | 2011-01-31 21:06:39 -0800 | [diff] [blame] | 795 | |
Dmitry Torokhov | 2e2e3b9 | 2010-03-21 22:56:15 -0700 | [diff] [blame] | 796 | return retval; |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 797 | } |
| 798 | EXPORT_SYMBOL(input_get_keycode); |
| 799 | |
| 800 | /** |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 801 | * input_set_keycode - attribute a keycode to a given scancode |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 802 | * @dev: input device which keymap is being updated |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 803 | * @ke: new keymap entry |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 804 | * |
| 805 | * This function should be called by anyone needing to update current |
| 806 | * keymap. Presently keyboard and evdev handlers use it. |
| 807 | */ |
Dmitry Torokhov | 58b9399 | 2010-03-08 22:37:10 -0800 | [diff] [blame] | 808 | int input_set_keycode(struct input_dev *dev, |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 809 | const struct input_keymap_entry *ke) |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 810 | { |
| 811 | unsigned long flags; |
Dmitry Torokhov | fd6cf3d | 2010-07-14 00:25:21 -0700 | [diff] [blame] | 812 | unsigned int old_keycode; |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 813 | int retval; |
| 814 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 815 | if (ke->keycode > KEY_MAX) |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 816 | return -EINVAL; |
| 817 | |
| 818 | spin_lock_irqsave(&dev->event_lock, flags); |
| 819 | |
Dmitry Torokhov | aebd636 | 2011-01-31 21:06:39 -0800 | [diff] [blame] | 820 | retval = dev->setkeycode(dev, ke, &old_keycode); |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 821 | if (retval) |
| 822 | goto out; |
| 823 | |
Dmitry Torokhov | 4f93df4 | 2010-01-05 17:56:00 -0800 | [diff] [blame] | 824 | /* Make sure KEY_RESERVED did not get enabled. */ |
| 825 | __clear_bit(KEY_RESERVED, dev->keybit); |
| 826 | |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 827 | /* |
| 828 | * Simulate keyup event if keycode is not present |
| 829 | * in the keymap anymore |
| 830 | */ |
| 831 | if (test_bit(EV_KEY, dev->evbit) && |
| 832 | !is_event_supported(old_keycode, dev->keybit, KEY_MAX) && |
| 833 | __test_and_clear_bit(old_keycode, dev->key)) { |
| 834 | |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 835 | input_pass_event(dev, EV_KEY, old_keycode, 0); |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 836 | if (dev->sync) |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 837 | input_pass_event(dev, EV_SYN, SYN_REPORT, 1); |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 838 | } |
| 839 | |
| 840 | out: |
| 841 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 842 | |
| 843 | return retval; |
| 844 | } |
| 845 | EXPORT_SYMBOL(input_set_keycode); |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 846 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | #define MATCH_BIT(bit, max) \ |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 848 | for (i = 0; i < BITS_TO_LONGS(max); i++) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \ |
| 850 | break; \ |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 851 | if (i != BITS_TO_LONGS(max)) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | continue; |
| 853 | |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 854 | static const struct input_device_id *input_match_device(struct input_handler *handler, |
Dmitry Torokhov | 66e6611 | 2006-09-14 01:31:59 -0400 | [diff] [blame] | 855 | struct input_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | { |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 857 | const struct input_device_id *id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | int i; |
| 859 | |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 860 | for (id = handler->id_table; id->flags || id->driver_info; id++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | |
| 862 | if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) |
Dmitry Torokhov | ddc5d34 | 2006-04-26 00:14:19 -0400 | [diff] [blame] | 863 | if (id->bustype != dev->id.bustype) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | continue; |
| 865 | |
| 866 | if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) |
Dmitry Torokhov | ddc5d34 | 2006-04-26 00:14:19 -0400 | [diff] [blame] | 867 | if (id->vendor != dev->id.vendor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | continue; |
| 869 | |
| 870 | if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) |
Dmitry Torokhov | ddc5d34 | 2006-04-26 00:14:19 -0400 | [diff] [blame] | 871 | if (id->product != dev->id.product) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | continue; |
| 873 | |
| 874 | if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) |
Dmitry Torokhov | ddc5d34 | 2006-04-26 00:14:19 -0400 | [diff] [blame] | 875 | if (id->version != dev->id.version) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | continue; |
| 877 | |
| 878 | MATCH_BIT(evbit, EV_MAX); |
| 879 | MATCH_BIT(keybit, KEY_MAX); |
| 880 | MATCH_BIT(relbit, REL_MAX); |
| 881 | MATCH_BIT(absbit, ABS_MAX); |
| 882 | MATCH_BIT(mscbit, MSC_MAX); |
| 883 | MATCH_BIT(ledbit, LED_MAX); |
| 884 | MATCH_BIT(sndbit, SND_MAX); |
| 885 | MATCH_BIT(ffbit, FF_MAX); |
Dmitry Torokhov | ff13f98 | 2005-09-24 02:02:29 -0500 | [diff] [blame] | 886 | MATCH_BIT(swbit, SW_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 888 | if (!handler->match || handler->match(handler, dev)) |
| 889 | return id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | } |
| 891 | |
| 892 | return NULL; |
| 893 | } |
| 894 | |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 895 | static int input_attach_handler(struct input_dev *dev, struct input_handler *handler) |
| 896 | { |
| 897 | const struct input_device_id *id; |
| 898 | int error; |
| 899 | |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 900 | id = input_match_device(handler, dev); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 901 | if (!id) |
| 902 | return -ENODEV; |
| 903 | |
| 904 | error = handler->connect(handler, dev, id); |
| 905 | if (error && error != -ENODEV) |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 906 | pr_err("failed to attach handler %s to device %s, error: %d\n", |
| 907 | handler->name, kobject_name(&dev->dev.kobj), error); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 908 | |
| 909 | return error; |
| 910 | } |
| 911 | |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 912 | #ifdef CONFIG_COMPAT |
| 913 | |
| 914 | static int input_bits_to_string(char *buf, int buf_size, |
| 915 | unsigned long bits, bool skip_empty) |
| 916 | { |
| 917 | int len = 0; |
| 918 | |
| 919 | if (INPUT_COMPAT_TEST) { |
| 920 | u32 dword = bits >> 32; |
| 921 | if (dword || !skip_empty) |
| 922 | len += snprintf(buf, buf_size, "%x ", dword); |
| 923 | |
| 924 | dword = bits & 0xffffffffUL; |
| 925 | if (dword || !skip_empty || len) |
| 926 | len += snprintf(buf + len, max(buf_size - len, 0), |
| 927 | "%x", dword); |
| 928 | } else { |
| 929 | if (bits || !skip_empty) |
| 930 | len += snprintf(buf, buf_size, "%lx", bits); |
| 931 | } |
| 932 | |
| 933 | return len; |
| 934 | } |
| 935 | |
| 936 | #else /* !CONFIG_COMPAT */ |
| 937 | |
| 938 | static int input_bits_to_string(char *buf, int buf_size, |
| 939 | unsigned long bits, bool skip_empty) |
| 940 | { |
| 941 | return bits || !skip_empty ? |
| 942 | snprintf(buf, buf_size, "%lx", bits) : 0; |
| 943 | } |
| 944 | |
| 945 | #endif |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 946 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | #ifdef CONFIG_PROC_FS |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 948 | |
| 949 | static struct proc_dir_entry *proc_bus_input_dir; |
| 950 | static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait); |
| 951 | static int input_devices_state; |
| 952 | |
| 953 | static inline void input_wakeup_procfs_readers(void) |
| 954 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | input_devices_state++; |
| 956 | wake_up(&input_devices_poll_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | } |
| 958 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 959 | static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 961 | poll_wait(file, &input_devices_poll_wait, wait); |
Dmitry Torokhov | fa88661 | 2009-03-04 00:52:20 -0800 | [diff] [blame] | 962 | if (file->f_version != input_devices_state) { |
| 963 | file->f_version = input_devices_state; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 964 | return POLLIN | POLLRDNORM; |
Dmitry Torokhov | fa88661 | 2009-03-04 00:52:20 -0800 | [diff] [blame] | 965 | } |
Dmitry Torokhov | 1e0afb2 | 2006-06-26 01:48:47 -0400 | [diff] [blame] | 966 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 967 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | } |
| 969 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 970 | union input_seq_state { |
| 971 | struct { |
| 972 | unsigned short pos; |
| 973 | bool mutex_acquired; |
| 974 | }; |
| 975 | void *p; |
| 976 | }; |
| 977 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 978 | static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos) |
| 979 | { |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 980 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
| 981 | int error; |
| 982 | |
| 983 | /* We need to fit into seq->private pointer */ |
| 984 | BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private)); |
| 985 | |
| 986 | error = mutex_lock_interruptible(&input_mutex); |
| 987 | if (error) { |
| 988 | state->mutex_acquired = false; |
| 989 | return ERR_PTR(error); |
| 990 | } |
| 991 | |
| 992 | state->mutex_acquired = true; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 993 | |
Pavel Emelianov | ad5d972 | 2007-07-18 00:38:32 -0400 | [diff] [blame] | 994 | return seq_list_start(&input_dev_list, *pos); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 995 | } |
| 996 | |
| 997 | static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 998 | { |
Pavel Emelianov | ad5d972 | 2007-07-18 00:38:32 -0400 | [diff] [blame] | 999 | return seq_list_next(v, &input_dev_list, pos); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1000 | } |
| 1001 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1002 | static void input_seq_stop(struct seq_file *seq, void *v) |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1003 | { |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1004 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
| 1005 | |
| 1006 | if (state->mutex_acquired) |
| 1007 | mutex_unlock(&input_mutex); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1008 | } |
| 1009 | |
| 1010 | static void input_seq_print_bitmap(struct seq_file *seq, const char *name, |
| 1011 | unsigned long *bitmap, int max) |
| 1012 | { |
| 1013 | int i; |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1014 | bool skip_empty = true; |
| 1015 | char buf[18]; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1016 | |
| 1017 | seq_printf(seq, "B: %s=", name); |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1018 | |
| 1019 | for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) { |
| 1020 | if (input_bits_to_string(buf, sizeof(buf), |
| 1021 | bitmap[i], skip_empty)) { |
| 1022 | skip_empty = false; |
| 1023 | seq_printf(seq, "%s%s", buf, i > 0 ? " " : ""); |
| 1024 | } |
| 1025 | } |
| 1026 | |
| 1027 | /* |
| 1028 | * If no output was produced print a single 0. |
| 1029 | */ |
| 1030 | if (skip_empty) |
| 1031 | seq_puts(seq, "0"); |
| 1032 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1033 | seq_putc(seq, '\n'); |
| 1034 | } |
| 1035 | |
| 1036 | static int input_devices_seq_show(struct seq_file *seq, void *v) |
| 1037 | { |
| 1038 | struct input_dev *dev = container_of(v, struct input_dev, node); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1039 | const char *path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | struct input_handle *handle; |
| 1041 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1042 | seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n", |
| 1043 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1045 | seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); |
| 1046 | seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : ""); |
| 1047 | seq_printf(seq, "S: Sysfs=%s\n", path ? path : ""); |
Dmitry Torokhov | 15e03ae | 2007-03-07 23:20:17 -0500 | [diff] [blame] | 1048 | seq_printf(seq, "U: Uniq=%s\n", dev->uniq ? dev->uniq : ""); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1049 | seq_printf(seq, "H: Handlers="); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1051 | list_for_each_entry(handle, &dev->h_list, d_node) |
| 1052 | seq_printf(seq, "%s ", handle->name); |
| 1053 | seq_putc(seq, '\n'); |
Dmitry Torokhov | 051b2fe | 2005-09-15 02:01:54 -0500 | [diff] [blame] | 1054 | |
Henrik Rydberg | 85b7720 | 2010-12-18 20:51:13 +0100 | [diff] [blame] | 1055 | input_seq_print_bitmap(seq, "PROP", dev->propbit, INPUT_PROP_MAX); |
| 1056 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1057 | input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX); |
| 1058 | if (test_bit(EV_KEY, dev->evbit)) |
| 1059 | input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX); |
| 1060 | if (test_bit(EV_REL, dev->evbit)) |
| 1061 | input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX); |
| 1062 | if (test_bit(EV_ABS, dev->evbit)) |
| 1063 | input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX); |
| 1064 | if (test_bit(EV_MSC, dev->evbit)) |
| 1065 | input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX); |
| 1066 | if (test_bit(EV_LED, dev->evbit)) |
| 1067 | input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX); |
| 1068 | if (test_bit(EV_SND, dev->evbit)) |
| 1069 | input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX); |
| 1070 | if (test_bit(EV_FF, dev->evbit)) |
| 1071 | input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX); |
| 1072 | if (test_bit(EV_SW, dev->evbit)) |
| 1073 | input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1075 | seq_putc(seq, '\n'); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1077 | kfree(path); |
| 1078 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | } |
| 1080 | |
Jan Engelhardt | cec69c3 | 2008-01-31 00:43:32 -0500 | [diff] [blame] | 1081 | static const struct seq_operations input_devices_seq_ops = { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1082 | .start = input_devices_seq_start, |
| 1083 | .next = input_devices_seq_next, |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1084 | .stop = input_seq_stop, |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1085 | .show = input_devices_seq_show, |
| 1086 | }; |
| 1087 | |
| 1088 | static int input_proc_devices_open(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1090 | return seq_open(file, &input_devices_seq_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | } |
| 1092 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 1093 | static const struct file_operations input_devices_fileops = { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1094 | .owner = THIS_MODULE, |
| 1095 | .open = input_proc_devices_open, |
| 1096 | .poll = input_proc_devices_poll, |
| 1097 | .read = seq_read, |
| 1098 | .llseek = seq_lseek, |
| 1099 | .release = seq_release, |
| 1100 | }; |
| 1101 | |
| 1102 | static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos) |
| 1103 | { |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1104 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
| 1105 | int error; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1106 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1107 | /* We need to fit into seq->private pointer */ |
| 1108 | BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private)); |
| 1109 | |
| 1110 | error = mutex_lock_interruptible(&input_mutex); |
| 1111 | if (error) { |
| 1112 | state->mutex_acquired = false; |
| 1113 | return ERR_PTR(error); |
| 1114 | } |
| 1115 | |
| 1116 | state->mutex_acquired = true; |
| 1117 | state->pos = *pos; |
| 1118 | |
Pavel Emelianov | ad5d972 | 2007-07-18 00:38:32 -0400 | [diff] [blame] | 1119 | return seq_list_start(&input_handler_list, *pos); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1120 | } |
| 1121 | |
| 1122 | static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1123 | { |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1124 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1125 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1126 | state->pos = *pos + 1; |
| 1127 | return seq_list_next(v, &input_handler_list, pos); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1128 | } |
| 1129 | |
| 1130 | static int input_handlers_seq_show(struct seq_file *seq, void *v) |
| 1131 | { |
| 1132 | struct input_handler *handler = container_of(v, struct input_handler, node); |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1133 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1134 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1135 | seq_printf(seq, "N: Number=%u Name=%s", state->pos, handler->name); |
Dmitry Torokhov | ef7995f | 2010-01-29 23:59:12 -0800 | [diff] [blame] | 1136 | if (handler->filter) |
| 1137 | seq_puts(seq, " (filter)"); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1138 | if (handler->fops) |
| 1139 | seq_printf(seq, " Minor=%d", handler->minor); |
| 1140 | seq_putc(seq, '\n'); |
| 1141 | |
| 1142 | return 0; |
| 1143 | } |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1144 | |
Jan Engelhardt | cec69c3 | 2008-01-31 00:43:32 -0500 | [diff] [blame] | 1145 | static const struct seq_operations input_handlers_seq_ops = { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1146 | .start = input_handlers_seq_start, |
| 1147 | .next = input_handlers_seq_next, |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1148 | .stop = input_seq_stop, |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1149 | .show = input_handlers_seq_show, |
| 1150 | }; |
| 1151 | |
| 1152 | static int input_proc_handlers_open(struct inode *inode, struct file *file) |
| 1153 | { |
| 1154 | return seq_open(file, &input_handlers_seq_ops); |
| 1155 | } |
| 1156 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 1157 | static const struct file_operations input_handlers_fileops = { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1158 | .owner = THIS_MODULE, |
| 1159 | .open = input_proc_handlers_open, |
| 1160 | .read = seq_read, |
| 1161 | .llseek = seq_lseek, |
| 1162 | .release = seq_release, |
| 1163 | }; |
Luke Kosewski | e334016fc | 2005-06-01 02:39:28 -0500 | [diff] [blame] | 1164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | static int __init input_proc_init(void) |
| 1166 | { |
| 1167 | struct proc_dir_entry *entry; |
| 1168 | |
Alexey Dobriyan | 9c37066 | 2008-04-29 01:01:41 -0700 | [diff] [blame] | 1169 | proc_bus_input_dir = proc_mkdir("bus/input", NULL); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1170 | if (!proc_bus_input_dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | return -ENOMEM; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1172 | |
Denis V. Lunev | c7705f3 | 2008-04-29 01:02:35 -0700 | [diff] [blame] | 1173 | entry = proc_create("devices", 0, proc_bus_input_dir, |
| 1174 | &input_devices_fileops); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1175 | if (!entry) |
| 1176 | goto fail1; |
| 1177 | |
Denis V. Lunev | c7705f3 | 2008-04-29 01:02:35 -0700 | [diff] [blame] | 1178 | entry = proc_create("handlers", 0, proc_bus_input_dir, |
| 1179 | &input_handlers_fileops); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1180 | if (!entry) |
| 1181 | goto fail2; |
| 1182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | return 0; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1184 | |
| 1185 | fail2: remove_proc_entry("devices", proc_bus_input_dir); |
Alexey Dobriyan | 9c37066 | 2008-04-29 01:01:41 -0700 | [diff] [blame] | 1186 | fail1: remove_proc_entry("bus/input", NULL); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1187 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1189 | |
Andrew Morton | beffbdc | 2005-07-01 23:54:30 -0500 | [diff] [blame] | 1190 | static void input_proc_exit(void) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1191 | { |
| 1192 | remove_proc_entry("devices", proc_bus_input_dir); |
| 1193 | remove_proc_entry("handlers", proc_bus_input_dir); |
Alexey Dobriyan | 9c37066 | 2008-04-29 01:01:41 -0700 | [diff] [blame] | 1194 | remove_proc_entry("bus/input", NULL); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1195 | } |
| 1196 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | #else /* !CONFIG_PROC_FS */ |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1198 | static inline void input_wakeup_procfs_readers(void) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | static inline int input_proc_init(void) { return 0; } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1200 | static inline void input_proc_exit(void) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | #endif |
| 1202 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1203 | #define INPUT_DEV_STRING_ATTR_SHOW(name) \ |
| 1204 | static ssize_t input_dev_show_##name(struct device *dev, \ |
| 1205 | struct device_attribute *attr, \ |
| 1206 | char *buf) \ |
| 1207 | { \ |
| 1208 | struct input_dev *input_dev = to_input_dev(dev); \ |
| 1209 | \ |
| 1210 | return scnprintf(buf, PAGE_SIZE, "%s\n", \ |
| 1211 | input_dev->name ? input_dev->name : ""); \ |
| 1212 | } \ |
| 1213 | static DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL) |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1214 | |
| 1215 | INPUT_DEV_STRING_ATTR_SHOW(name); |
| 1216 | INPUT_DEV_STRING_ATTR_SHOW(phys); |
| 1217 | INPUT_DEV_STRING_ATTR_SHOW(uniq); |
| 1218 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1219 | static int input_print_modalias_bits(char *buf, int size, |
| 1220 | char name, unsigned long *bm, |
| 1221 | unsigned int min_bit, unsigned int max_bit) |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1222 | { |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1223 | int len = 0, i; |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1224 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1225 | len += snprintf(buf, max(size, 0), "%c", name); |
| 1226 | for (i = min_bit; i < max_bit; i++) |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 1227 | if (bm[BIT_WORD(i)] & BIT_MASK(i)) |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1228 | len += snprintf(buf + len, max(size - len, 0), "%X,", i); |
Kay Sievers | bd37e5a | 2006-01-05 13:19:55 +0100 | [diff] [blame] | 1229 | return len; |
| 1230 | } |
| 1231 | |
Dmitry Torokhov | 2db6687 | 2006-04-02 00:09:26 -0500 | [diff] [blame] | 1232 | static int input_print_modalias(char *buf, int size, struct input_dev *id, |
| 1233 | int add_cr) |
Kay Sievers | bd37e5a | 2006-01-05 13:19:55 +0100 | [diff] [blame] | 1234 | { |
| 1235 | int len; |
| 1236 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1237 | len = snprintf(buf, max(size, 0), |
| 1238 | "input:b%04Xv%04Xp%04Xe%04X-", |
| 1239 | id->id.bustype, id->id.vendor, |
| 1240 | id->id.product, id->id.version); |
Kay Sievers | bd37e5a | 2006-01-05 13:19:55 +0100 | [diff] [blame] | 1241 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1242 | len += input_print_modalias_bits(buf + len, size - len, |
| 1243 | 'e', id->evbit, 0, EV_MAX); |
| 1244 | len += input_print_modalias_bits(buf + len, size - len, |
| 1245 | 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX); |
| 1246 | len += input_print_modalias_bits(buf + len, size - len, |
| 1247 | 'r', id->relbit, 0, REL_MAX); |
| 1248 | len += input_print_modalias_bits(buf + len, size - len, |
| 1249 | 'a', id->absbit, 0, ABS_MAX); |
| 1250 | len += input_print_modalias_bits(buf + len, size - len, |
| 1251 | 'm', id->mscbit, 0, MSC_MAX); |
| 1252 | len += input_print_modalias_bits(buf + len, size - len, |
| 1253 | 'l', id->ledbit, 0, LED_MAX); |
| 1254 | len += input_print_modalias_bits(buf + len, size - len, |
| 1255 | 's', id->sndbit, 0, SND_MAX); |
| 1256 | len += input_print_modalias_bits(buf + len, size - len, |
| 1257 | 'f', id->ffbit, 0, FF_MAX); |
| 1258 | len += input_print_modalias_bits(buf + len, size - len, |
| 1259 | 'w', id->swbit, 0, SW_MAX); |
Dmitry Torokhov | 2db6687 | 2006-04-02 00:09:26 -0500 | [diff] [blame] | 1260 | |
| 1261 | if (add_cr) |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1262 | len += snprintf(buf + len, max(size - len, 0), "\n"); |
Dmitry Torokhov | 2db6687 | 2006-04-02 00:09:26 -0500 | [diff] [blame] | 1263 | |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1264 | return len; |
| 1265 | } |
| 1266 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1267 | static ssize_t input_dev_show_modalias(struct device *dev, |
| 1268 | struct device_attribute *attr, |
| 1269 | char *buf) |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1270 | { |
| 1271 | struct input_dev *id = to_input_dev(dev); |
Kay Sievers | bd37e5a | 2006-01-05 13:19:55 +0100 | [diff] [blame] | 1272 | ssize_t len; |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1273 | |
Dmitry Torokhov | 2db6687 | 2006-04-02 00:09:26 -0500 | [diff] [blame] | 1274 | len = input_print_modalias(buf, PAGE_SIZE, id, 1); |
| 1275 | |
Richard Purdie | 8a3cf45 | 2006-06-26 01:48:21 -0400 | [diff] [blame] | 1276 | return min_t(int, len, PAGE_SIZE); |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1277 | } |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1278 | static DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL); |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1279 | |
Henrik Rydberg | 85b7720 | 2010-12-18 20:51:13 +0100 | [diff] [blame] | 1280 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, |
| 1281 | int max, int add_cr); |
| 1282 | |
| 1283 | static ssize_t input_dev_show_properties(struct device *dev, |
| 1284 | struct device_attribute *attr, |
| 1285 | char *buf) |
| 1286 | { |
| 1287 | struct input_dev *input_dev = to_input_dev(dev); |
| 1288 | int len = input_print_bitmap(buf, PAGE_SIZE, input_dev->propbit, |
| 1289 | INPUT_PROP_MAX, true); |
| 1290 | return min_t(int, len, PAGE_SIZE); |
| 1291 | } |
| 1292 | static DEVICE_ATTR(properties, S_IRUGO, input_dev_show_properties, NULL); |
| 1293 | |
Greg Kroah-Hartman | 629b77a | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1294 | static struct attribute *input_dev_attrs[] = { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1295 | &dev_attr_name.attr, |
| 1296 | &dev_attr_phys.attr, |
| 1297 | &dev_attr_uniq.attr, |
| 1298 | &dev_attr_modalias.attr, |
Henrik Rydberg | 85b7720 | 2010-12-18 20:51:13 +0100 | [diff] [blame] | 1299 | &dev_attr_properties.attr, |
Greg Kroah-Hartman | 629b77a | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1300 | NULL |
| 1301 | }; |
| 1302 | |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 1303 | static struct attribute_group input_dev_attr_group = { |
Greg Kroah-Hartman | 629b77a | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1304 | .attrs = input_dev_attrs, |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1305 | }; |
| 1306 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1307 | #define INPUT_DEV_ID_ATTR(name) \ |
| 1308 | static ssize_t input_dev_show_id_##name(struct device *dev, \ |
| 1309 | struct device_attribute *attr, \ |
| 1310 | char *buf) \ |
| 1311 | { \ |
| 1312 | struct input_dev *input_dev = to_input_dev(dev); \ |
| 1313 | return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \ |
| 1314 | } \ |
| 1315 | static DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL) |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1316 | |
| 1317 | INPUT_DEV_ID_ATTR(bustype); |
| 1318 | INPUT_DEV_ID_ATTR(vendor); |
| 1319 | INPUT_DEV_ID_ATTR(product); |
| 1320 | INPUT_DEV_ID_ATTR(version); |
| 1321 | |
| 1322 | static struct attribute *input_dev_id_attrs[] = { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1323 | &dev_attr_bustype.attr, |
| 1324 | &dev_attr_vendor.attr, |
| 1325 | &dev_attr_product.attr, |
| 1326 | &dev_attr_version.attr, |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1327 | NULL |
| 1328 | }; |
| 1329 | |
| 1330 | static struct attribute_group input_dev_id_attr_group = { |
| 1331 | .name = "id", |
| 1332 | .attrs = input_dev_id_attrs, |
| 1333 | }; |
| 1334 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1335 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, |
| 1336 | int max, int add_cr) |
| 1337 | { |
| 1338 | int i; |
| 1339 | int len = 0; |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1340 | bool skip_empty = true; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1341 | |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1342 | for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) { |
| 1343 | len += input_bits_to_string(buf + len, max(buf_size - len, 0), |
| 1344 | bitmap[i], skip_empty); |
| 1345 | if (len) { |
| 1346 | skip_empty = false; |
| 1347 | if (i > 0) |
| 1348 | len += snprintf(buf + len, max(buf_size - len, 0), " "); |
| 1349 | } |
| 1350 | } |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1351 | |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1352 | /* |
| 1353 | * If no output was produced print a single 0. |
| 1354 | */ |
| 1355 | if (len == 0) |
| 1356 | len = snprintf(buf, buf_size, "%d", 0); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1357 | |
| 1358 | if (add_cr) |
| 1359 | len += snprintf(buf + len, max(buf_size - len, 0), "\n"); |
| 1360 | |
| 1361 | return len; |
| 1362 | } |
| 1363 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1364 | #define INPUT_DEV_CAP_ATTR(ev, bm) \ |
| 1365 | static ssize_t input_dev_show_cap_##bm(struct device *dev, \ |
| 1366 | struct device_attribute *attr, \ |
| 1367 | char *buf) \ |
| 1368 | { \ |
| 1369 | struct input_dev *input_dev = to_input_dev(dev); \ |
| 1370 | int len = input_print_bitmap(buf, PAGE_SIZE, \ |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1371 | input_dev->bm##bit, ev##_MAX, \ |
| 1372 | true); \ |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1373 | return min_t(int, len, PAGE_SIZE); \ |
| 1374 | } \ |
| 1375 | static DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL) |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1376 | |
| 1377 | INPUT_DEV_CAP_ATTR(EV, ev); |
| 1378 | INPUT_DEV_CAP_ATTR(KEY, key); |
| 1379 | INPUT_DEV_CAP_ATTR(REL, rel); |
| 1380 | INPUT_DEV_CAP_ATTR(ABS, abs); |
| 1381 | INPUT_DEV_CAP_ATTR(MSC, msc); |
| 1382 | INPUT_DEV_CAP_ATTR(LED, led); |
| 1383 | INPUT_DEV_CAP_ATTR(SND, snd); |
| 1384 | INPUT_DEV_CAP_ATTR(FF, ff); |
| 1385 | INPUT_DEV_CAP_ATTR(SW, sw); |
| 1386 | |
| 1387 | static struct attribute *input_dev_caps_attrs[] = { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1388 | &dev_attr_ev.attr, |
| 1389 | &dev_attr_key.attr, |
| 1390 | &dev_attr_rel.attr, |
| 1391 | &dev_attr_abs.attr, |
| 1392 | &dev_attr_msc.attr, |
| 1393 | &dev_attr_led.attr, |
| 1394 | &dev_attr_snd.attr, |
| 1395 | &dev_attr_ff.attr, |
| 1396 | &dev_attr_sw.attr, |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1397 | NULL |
| 1398 | }; |
| 1399 | |
| 1400 | static struct attribute_group input_dev_caps_attr_group = { |
| 1401 | .name = "capabilities", |
| 1402 | .attrs = input_dev_caps_attrs, |
| 1403 | }; |
| 1404 | |
David Brownell | a4dbd67 | 2009-06-24 10:06:31 -0700 | [diff] [blame] | 1405 | static const struct attribute_group *input_dev_attr_groups[] = { |
Dmitry Torokhov | cb9def4 | 2007-03-07 23:20:26 -0500 | [diff] [blame] | 1406 | &input_dev_attr_group, |
| 1407 | &input_dev_id_attr_group, |
| 1408 | &input_dev_caps_attr_group, |
| 1409 | NULL |
| 1410 | }; |
| 1411 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1412 | static void input_dev_release(struct device *device) |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1413 | { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1414 | struct input_dev *dev = to_input_dev(device); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1415 | |
Anssi Hannula | 509ca1a | 2006-07-19 01:40:22 -0400 | [diff] [blame] | 1416 | input_ff_destroy(dev); |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 1417 | input_mt_destroy_slots(dev); |
Daniel Mack | d31b286 | 2010-08-02 20:18:21 -0700 | [diff] [blame] | 1418 | kfree(dev->absinfo); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1419 | kfree(dev); |
Anssi Hannula | 509ca1a | 2006-07-19 01:40:22 -0400 | [diff] [blame] | 1420 | |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1421 | module_put(THIS_MODULE); |
| 1422 | } |
| 1423 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1424 | /* |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 1425 | * Input uevent interface - loading event handlers based on |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1426 | * device bitfields. |
| 1427 | */ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1428 | static int input_add_uevent_bm_var(struct kobj_uevent_env *env, |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1429 | const char *name, unsigned long *bitmap, int max) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1430 | { |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1431 | int len; |
| 1432 | |
Henrik Rydberg | fcd3027 | 2010-12-18 20:28:26 +0100 | [diff] [blame] | 1433 | if (add_uevent_var(env, "%s", name)) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1434 | return -ENOMEM; |
| 1435 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1436 | len = input_print_bitmap(&env->buf[env->buflen - 1], |
| 1437 | sizeof(env->buf) - env->buflen, |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1438 | bitmap, max, false); |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1439 | if (len >= (sizeof(env->buf) - env->buflen)) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1440 | return -ENOMEM; |
| 1441 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1442 | env->buflen += len; |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1443 | return 0; |
| 1444 | } |
| 1445 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1446 | static int input_add_uevent_modalias_var(struct kobj_uevent_env *env, |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1447 | struct input_dev *dev) |
| 1448 | { |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1449 | int len; |
| 1450 | |
| 1451 | if (add_uevent_var(env, "MODALIAS=")) |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1452 | return -ENOMEM; |
| 1453 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1454 | len = input_print_modalias(&env->buf[env->buflen - 1], |
| 1455 | sizeof(env->buf) - env->buflen, |
| 1456 | dev, 0); |
| 1457 | if (len >= (sizeof(env->buf) - env->buflen)) |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1458 | return -ENOMEM; |
| 1459 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1460 | env->buflen += len; |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1461 | return 0; |
| 1462 | } |
| 1463 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1464 | #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \ |
| 1465 | do { \ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1466 | int err = add_uevent_var(env, fmt, val); \ |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1467 | if (err) \ |
| 1468 | return err; \ |
| 1469 | } while (0) |
| 1470 | |
| 1471 | #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \ |
| 1472 | do { \ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1473 | int err = input_add_uevent_bm_var(env, name, bm, max); \ |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1474 | if (err) \ |
| 1475 | return err; \ |
| 1476 | } while (0) |
| 1477 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1478 | #define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \ |
| 1479 | do { \ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1480 | int err = input_add_uevent_modalias_var(env, dev); \ |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1481 | if (err) \ |
| 1482 | return err; \ |
| 1483 | } while (0) |
| 1484 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1485 | static int input_dev_uevent(struct device *device, struct kobj_uevent_env *env) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1486 | { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1487 | struct input_dev *dev = to_input_dev(device); |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1488 | |
| 1489 | INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x", |
| 1490 | dev->id.bustype, dev->id.vendor, |
| 1491 | dev->id.product, dev->id.version); |
| 1492 | if (dev->name) |
| 1493 | INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); |
| 1494 | if (dev->phys) |
| 1495 | INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); |
Dmitry Torokhov | 08de1f0 | 2005-11-08 21:34:29 -0800 | [diff] [blame] | 1496 | if (dev->uniq) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1497 | INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); |
| 1498 | |
Henrik Rydberg | 85b7720 | 2010-12-18 20:51:13 +0100 | [diff] [blame] | 1499 | INPUT_ADD_HOTPLUG_BM_VAR("PROP=", dev->propbit, INPUT_PROP_MAX); |
| 1500 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1501 | INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); |
| 1502 | if (test_bit(EV_KEY, dev->evbit)) |
| 1503 | INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); |
| 1504 | if (test_bit(EV_REL, dev->evbit)) |
| 1505 | INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); |
| 1506 | if (test_bit(EV_ABS, dev->evbit)) |
| 1507 | INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); |
| 1508 | if (test_bit(EV_MSC, dev->evbit)) |
| 1509 | INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); |
| 1510 | if (test_bit(EV_LED, dev->evbit)) |
| 1511 | INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); |
| 1512 | if (test_bit(EV_SND, dev->evbit)) |
| 1513 | INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); |
| 1514 | if (test_bit(EV_FF, dev->evbit)) |
| 1515 | INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); |
| 1516 | if (test_bit(EV_SW, dev->evbit)) |
| 1517 | INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); |
| 1518 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1519 | INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev); |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1520 | |
| 1521 | return 0; |
| 1522 | } |
| 1523 | |
Dmitry Torokhov | 3cc9635 | 2009-11-12 23:19:05 -0800 | [diff] [blame] | 1524 | #define INPUT_DO_TOGGLE(dev, type, bits, on) \ |
| 1525 | do { \ |
| 1526 | int i; \ |
| 1527 | bool active; \ |
| 1528 | \ |
| 1529 | if (!test_bit(EV_##type, dev->evbit)) \ |
| 1530 | break; \ |
| 1531 | \ |
| 1532 | for (i = 0; i < type##_MAX; i++) { \ |
| 1533 | if (!test_bit(i, dev->bits##bit)) \ |
| 1534 | continue; \ |
| 1535 | \ |
| 1536 | active = test_bit(i, dev->bits); \ |
| 1537 | if (!active && !on) \ |
| 1538 | continue; \ |
| 1539 | \ |
| 1540 | dev->event(dev, EV_##type, i, on ? active : 0); \ |
| 1541 | } \ |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1542 | } while (0) |
| 1543 | |
Dmitry Torokhov | b50b521 | 2010-11-03 11:02:31 -0700 | [diff] [blame] | 1544 | static void input_dev_toggle(struct input_dev *dev, bool activate) |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1545 | { |
| 1546 | if (!dev->event) |
| 1547 | return; |
| 1548 | |
| 1549 | INPUT_DO_TOGGLE(dev, LED, led, activate); |
| 1550 | INPUT_DO_TOGGLE(dev, SND, snd, activate); |
| 1551 | |
| 1552 | if (activate && test_bit(EV_REP, dev->evbit)) { |
| 1553 | dev->event(dev, EV_REP, REP_PERIOD, dev->rep[REP_PERIOD]); |
| 1554 | dev->event(dev, EV_REP, REP_DELAY, dev->rep[REP_DELAY]); |
| 1555 | } |
| 1556 | } |
| 1557 | |
Dmitry Torokhov | b50b521 | 2010-11-03 11:02:31 -0700 | [diff] [blame] | 1558 | /** |
| 1559 | * input_reset_device() - reset/restore the state of input device |
| 1560 | * @dev: input device whose state needs to be reset |
| 1561 | * |
| 1562 | * This function tries to reset the state of an opened input device and |
| 1563 | * bring internal state and state if the hardware in sync with each other. |
| 1564 | * We mark all keys as released, restore LED state, repeat rate, etc. |
| 1565 | */ |
| 1566 | void input_reset_device(struct input_dev *dev) |
| 1567 | { |
| 1568 | mutex_lock(&dev->mutex); |
| 1569 | |
| 1570 | if (dev->users) { |
| 1571 | input_dev_toggle(dev, true); |
| 1572 | |
| 1573 | /* |
| 1574 | * Keys that have been pressed at suspend time are unlikely |
| 1575 | * to be still pressed when we resume. |
| 1576 | */ |
| 1577 | spin_lock_irq(&dev->event_lock); |
| 1578 | input_dev_release_keys(dev); |
| 1579 | spin_unlock_irq(&dev->event_lock); |
| 1580 | } |
| 1581 | |
| 1582 | mutex_unlock(&dev->mutex); |
| 1583 | } |
| 1584 | EXPORT_SYMBOL(input_reset_device); |
| 1585 | |
| 1586 | #ifdef CONFIG_PM |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1587 | static int input_dev_suspend(struct device *dev) |
| 1588 | { |
| 1589 | struct input_dev *input_dev = to_input_dev(dev); |
| 1590 | |
| 1591 | mutex_lock(&input_dev->mutex); |
Dmitry Torokhov | b50b521 | 2010-11-03 11:02:31 -0700 | [diff] [blame] | 1592 | |
| 1593 | if (input_dev->users) |
| 1594 | input_dev_toggle(input_dev, false); |
| 1595 | |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1596 | mutex_unlock(&input_dev->mutex); |
| 1597 | |
| 1598 | return 0; |
| 1599 | } |
| 1600 | |
| 1601 | static int input_dev_resume(struct device *dev) |
| 1602 | { |
| 1603 | struct input_dev *input_dev = to_input_dev(dev); |
| 1604 | |
Dmitry Torokhov | b50b521 | 2010-11-03 11:02:31 -0700 | [diff] [blame] | 1605 | input_reset_device(input_dev); |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1606 | |
| 1607 | return 0; |
| 1608 | } |
| 1609 | |
| 1610 | static const struct dev_pm_ops input_dev_pm_ops = { |
| 1611 | .suspend = input_dev_suspend, |
| 1612 | .resume = input_dev_resume, |
| 1613 | .poweroff = input_dev_suspend, |
| 1614 | .restore = input_dev_resume, |
| 1615 | }; |
| 1616 | #endif /* CONFIG_PM */ |
| 1617 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1618 | static struct device_type input_dev_type = { |
| 1619 | .groups = input_dev_attr_groups, |
| 1620 | .release = input_dev_release, |
| 1621 | .uevent = input_dev_uevent, |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1622 | #ifdef CONFIG_PM |
| 1623 | .pm = &input_dev_pm_ops, |
| 1624 | #endif |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1625 | }; |
| 1626 | |
Kay Sievers | e454cea | 2009-09-18 23:01:12 +0200 | [diff] [blame] | 1627 | static char *input_devnode(struct device *dev, mode_t *mode) |
Kay Sievers | aa5ed63 | 2009-04-30 15:23:42 +0200 | [diff] [blame] | 1628 | { |
| 1629 | return kasprintf(GFP_KERNEL, "input/%s", dev_name(dev)); |
| 1630 | } |
| 1631 | |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1632 | struct class input_class = { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1633 | .name = "input", |
Kay Sievers | e454cea | 2009-09-18 23:01:12 +0200 | [diff] [blame] | 1634 | .devnode = input_devnode, |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1635 | }; |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1636 | EXPORT_SYMBOL_GPL(input_class); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1637 | |
Dmitry Torokhov | 1447190 | 2006-11-02 23:26:55 -0500 | [diff] [blame] | 1638 | /** |
| 1639 | * input_allocate_device - allocate memory for new input device |
| 1640 | * |
| 1641 | * Returns prepared struct input_dev or NULL. |
| 1642 | * |
| 1643 | * NOTE: Use input_free_device() to free devices that have not been |
| 1644 | * registered; input_unregister_device() should be used for already |
| 1645 | * registered devices. |
| 1646 | */ |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1647 | struct input_dev *input_allocate_device(void) |
| 1648 | { |
| 1649 | struct input_dev *dev; |
| 1650 | |
| 1651 | dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL); |
| 1652 | if (dev) { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1653 | dev->dev.type = &input_dev_type; |
| 1654 | dev->dev.class = &input_class; |
| 1655 | device_initialize(&dev->dev); |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1656 | mutex_init(&dev->mutex); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1657 | spin_lock_init(&dev->event_lock); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1658 | INIT_LIST_HEAD(&dev->h_list); |
| 1659 | INIT_LIST_HEAD(&dev->node); |
Dmitry Torokhov | 655816e | 2006-09-14 01:32:14 -0400 | [diff] [blame] | 1660 | |
| 1661 | __module_get(THIS_MODULE); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1662 | } |
| 1663 | |
| 1664 | return dev; |
| 1665 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1666 | EXPORT_SYMBOL(input_allocate_device); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1667 | |
Dmitry Torokhov | 1447190 | 2006-11-02 23:26:55 -0500 | [diff] [blame] | 1668 | /** |
| 1669 | * input_free_device - free memory occupied by input_dev structure |
| 1670 | * @dev: input device to free |
| 1671 | * |
| 1672 | * This function should only be used if input_register_device() |
| 1673 | * was not called yet or if it failed. Once device was registered |
| 1674 | * use input_unregister_device() and memory will be freed once last |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1675 | * reference to the device is dropped. |
Dmitry Torokhov | 1447190 | 2006-11-02 23:26:55 -0500 | [diff] [blame] | 1676 | * |
| 1677 | * Device should be allocated by input_allocate_device(). |
| 1678 | * |
| 1679 | * NOTE: If there are references to the input device then memory |
| 1680 | * will not be freed until last reference is dropped. |
| 1681 | */ |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1682 | void input_free_device(struct input_dev *dev) |
| 1683 | { |
Dmitry Torokhov | 54f9e36 | 2007-03-16 00:57:25 -0400 | [diff] [blame] | 1684 | if (dev) |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1685 | input_put_device(dev); |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1686 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1687 | EXPORT_SYMBOL(input_free_device); |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1688 | |
Dmitry Torokhov | 534565f | 2007-04-25 00:53:18 -0400 | [diff] [blame] | 1689 | /** |
| 1690 | * input_set_capability - mark device as capable of a certain event |
| 1691 | * @dev: device that is capable of emitting or accepting event |
| 1692 | * @type: type of the event (EV_KEY, EV_REL, etc...) |
| 1693 | * @code: event code |
| 1694 | * |
| 1695 | * In addition to setting up corresponding bit in appropriate capability |
| 1696 | * bitmap the function also adjusts dev->evbit. |
| 1697 | */ |
| 1698 | void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code) |
| 1699 | { |
| 1700 | switch (type) { |
| 1701 | case EV_KEY: |
| 1702 | __set_bit(code, dev->keybit); |
| 1703 | break; |
| 1704 | |
| 1705 | case EV_REL: |
| 1706 | __set_bit(code, dev->relbit); |
| 1707 | break; |
| 1708 | |
| 1709 | case EV_ABS: |
| 1710 | __set_bit(code, dev->absbit); |
| 1711 | break; |
| 1712 | |
| 1713 | case EV_MSC: |
| 1714 | __set_bit(code, dev->mscbit); |
| 1715 | break; |
| 1716 | |
| 1717 | case EV_SW: |
| 1718 | __set_bit(code, dev->swbit); |
| 1719 | break; |
| 1720 | |
| 1721 | case EV_LED: |
| 1722 | __set_bit(code, dev->ledbit); |
| 1723 | break; |
| 1724 | |
| 1725 | case EV_SND: |
| 1726 | __set_bit(code, dev->sndbit); |
| 1727 | break; |
| 1728 | |
| 1729 | case EV_FF: |
| 1730 | __set_bit(code, dev->ffbit); |
| 1731 | break; |
| 1732 | |
Dmitry Baryshkov | 22d1c39 | 2007-12-14 01:21:03 -0500 | [diff] [blame] | 1733 | case EV_PWR: |
| 1734 | /* do nothing */ |
| 1735 | break; |
| 1736 | |
Dmitry Torokhov | 534565f | 2007-04-25 00:53:18 -0400 | [diff] [blame] | 1737 | default: |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 1738 | pr_err("input_set_capability: unknown type %u (code %u)\n", |
| 1739 | type, code); |
Dmitry Torokhov | 534565f | 2007-04-25 00:53:18 -0400 | [diff] [blame] | 1740 | dump_stack(); |
| 1741 | return; |
| 1742 | } |
| 1743 | |
| 1744 | __set_bit(type, dev->evbit); |
| 1745 | } |
| 1746 | EXPORT_SYMBOL(input_set_capability); |
| 1747 | |
Jeff Brown | 80b4895 | 2011-04-18 10:08:02 -0700 | [diff] [blame] | 1748 | static unsigned int input_estimate_events_per_packet(struct input_dev *dev) |
| 1749 | { |
| 1750 | int mt_slots; |
| 1751 | int i; |
| 1752 | unsigned int events; |
| 1753 | |
| 1754 | if (dev->mtsize) { |
| 1755 | mt_slots = dev->mtsize; |
| 1756 | } else if (test_bit(ABS_MT_TRACKING_ID, dev->absbit)) { |
| 1757 | mt_slots = dev->absinfo[ABS_MT_TRACKING_ID].maximum - |
| 1758 | dev->absinfo[ABS_MT_TRACKING_ID].minimum + 1, |
Hans Petter Selasky | 8c127f0 | 2011-05-25 09:24:32 -0700 | [diff] [blame] | 1759 | mt_slots = clamp(mt_slots, 2, 32); |
Jeff Brown | 80b4895 | 2011-04-18 10:08:02 -0700 | [diff] [blame] | 1760 | } else if (test_bit(ABS_MT_POSITION_X, dev->absbit)) { |
| 1761 | mt_slots = 2; |
| 1762 | } else { |
| 1763 | mt_slots = 0; |
| 1764 | } |
| 1765 | |
| 1766 | events = mt_slots + 1; /* count SYN_MT_REPORT and SYN_REPORT */ |
| 1767 | |
| 1768 | for (i = 0; i < ABS_CNT; i++) { |
| 1769 | if (test_bit(i, dev->absbit)) { |
| 1770 | if (input_is_mt_axis(i)) |
| 1771 | events += mt_slots; |
| 1772 | else |
| 1773 | events++; |
| 1774 | } |
| 1775 | } |
| 1776 | |
| 1777 | for (i = 0; i < REL_CNT; i++) |
| 1778 | if (test_bit(i, dev->relbit)) |
| 1779 | events++; |
| 1780 | |
| 1781 | return events; |
| 1782 | } |
| 1783 | |
Dmitry Torokhov | 92a3a58 | 2010-01-05 17:56:01 -0800 | [diff] [blame] | 1784 | #define INPUT_CLEANSE_BITMASK(dev, type, bits) \ |
| 1785 | do { \ |
| 1786 | if (!test_bit(EV_##type, dev->evbit)) \ |
| 1787 | memset(dev->bits##bit, 0, \ |
| 1788 | sizeof(dev->bits##bit)); \ |
| 1789 | } while (0) |
| 1790 | |
| 1791 | static void input_cleanse_bitmasks(struct input_dev *dev) |
| 1792 | { |
| 1793 | INPUT_CLEANSE_BITMASK(dev, KEY, key); |
| 1794 | INPUT_CLEANSE_BITMASK(dev, REL, rel); |
| 1795 | INPUT_CLEANSE_BITMASK(dev, ABS, abs); |
| 1796 | INPUT_CLEANSE_BITMASK(dev, MSC, msc); |
| 1797 | INPUT_CLEANSE_BITMASK(dev, LED, led); |
| 1798 | INPUT_CLEANSE_BITMASK(dev, SND, snd); |
| 1799 | INPUT_CLEANSE_BITMASK(dev, FF, ff); |
| 1800 | INPUT_CLEANSE_BITMASK(dev, SW, sw); |
| 1801 | } |
| 1802 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1803 | /** |
| 1804 | * input_register_device - register device with input core |
| 1805 | * @dev: device to be registered |
| 1806 | * |
| 1807 | * This function registers device with input core. The device must be |
| 1808 | * allocated with input_allocate_device() and all it's capabilities |
| 1809 | * set up before registering. |
| 1810 | * If function fails the device must be freed with input_free_device(). |
| 1811 | * Once device has been successfully registered it can be unregistered |
| 1812 | * with input_unregister_device(); input_free_device() should not be |
| 1813 | * called in this case. |
| 1814 | */ |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 1815 | int input_register_device(struct input_dev *dev) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1816 | { |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 1817 | static atomic_t input_no = ATOMIC_INIT(0); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1818 | struct input_handler *handler; |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 1819 | const char *path; |
| 1820 | int error; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1821 | |
Dmitry Torokhov | 4f93df4 | 2010-01-05 17:56:00 -0800 | [diff] [blame] | 1822 | /* Every input device generates EV_SYN/SYN_REPORT events. */ |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1823 | __set_bit(EV_SYN, dev->evbit); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1824 | |
Dmitry Torokhov | 4f93df4 | 2010-01-05 17:56:00 -0800 | [diff] [blame] | 1825 | /* KEY_RESERVED is not supposed to be transmitted to userspace. */ |
| 1826 | __clear_bit(KEY_RESERVED, dev->keybit); |
| 1827 | |
Dmitry Torokhov | 92a3a58 | 2010-01-05 17:56:01 -0800 | [diff] [blame] | 1828 | /* Make sure that bitmasks not mentioned in dev->evbit are clean. */ |
| 1829 | input_cleanse_bitmasks(dev); |
| 1830 | |
Jeff Brown | 80b4895 | 2011-04-18 10:08:02 -0700 | [diff] [blame] | 1831 | if (!dev->hint_events_per_packet) |
| 1832 | dev->hint_events_per_packet = |
| 1833 | input_estimate_events_per_packet(dev); |
| 1834 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1835 | /* |
| 1836 | * If delay and period are pre-set by the driver, then autorepeating |
| 1837 | * is handled by the driver itself and we don't do it in input.c. |
| 1838 | */ |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1839 | init_timer(&dev->timer); |
| 1840 | if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) { |
| 1841 | dev->timer.data = (long) dev; |
| 1842 | dev->timer.function = input_repeat_key; |
| 1843 | dev->rep[REP_DELAY] = 250; |
| 1844 | dev->rep[REP_PERIOD] = 33; |
| 1845 | } |
| 1846 | |
Dmitry Torokhov | aebd636 | 2011-01-31 21:06:39 -0800 | [diff] [blame] | 1847 | if (!dev->getkeycode) |
| 1848 | dev->getkeycode = input_default_getkeycode; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 1849 | |
Dmitry Torokhov | aebd636 | 2011-01-31 21:06:39 -0800 | [diff] [blame] | 1850 | if (!dev->setkeycode) |
| 1851 | dev->setkeycode = input_default_setkeycode; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 1852 | |
Kay Sievers | a6c2490 | 2008-10-30 00:07:50 -0400 | [diff] [blame] | 1853 | dev_set_name(&dev->dev, "input%ld", |
| 1854 | (unsigned long) atomic_inc_return(&input_no) - 1); |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 1855 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1856 | error = device_add(&dev->dev); |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 1857 | if (error) |
| 1858 | return error; |
| 1859 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1860 | path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 1861 | pr_info("%s as %s\n", |
| 1862 | dev->name ? dev->name : "Unspecified device", |
| 1863 | path ? path : "N/A"); |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 1864 | kfree(path); |
Greg Kroah-Hartman | 1020402 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1865 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1866 | error = mutex_lock_interruptible(&input_mutex); |
| 1867 | if (error) { |
| 1868 | device_del(&dev->dev); |
| 1869 | return error; |
| 1870 | } |
| 1871 | |
| 1872 | list_add_tail(&dev->node, &input_dev_list); |
| 1873 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1874 | list_for_each_entry(handler, &input_handler_list, node) |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1875 | input_attach_handler(dev, handler); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1876 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1877 | input_wakeup_procfs_readers(); |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 1878 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1879 | mutex_unlock(&input_mutex); |
| 1880 | |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 1881 | return 0; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1882 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1883 | EXPORT_SYMBOL(input_register_device); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1884 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1885 | /** |
| 1886 | * input_unregister_device - unregister previously registered device |
| 1887 | * @dev: device to be unregistered |
| 1888 | * |
| 1889 | * This function unregisters an input device. Once device is unregistered |
| 1890 | * the caller should not try to access it as it may get freed at any moment. |
| 1891 | */ |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1892 | void input_unregister_device(struct input_dev *dev) |
| 1893 | { |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1894 | struct input_handle *handle, *next; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1895 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1896 | input_disconnect_device(dev); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1897 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1898 | mutex_lock(&input_mutex); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1899 | |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1900 | list_for_each_entry_safe(handle, next, &dev->h_list, d_node) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1901 | handle->handler->disconnect(handle); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1902 | WARN_ON(!list_empty(&dev->h_list)); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1903 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1904 | del_timer_sync(&dev->timer); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1905 | list_del_init(&dev->node); |
| 1906 | |
| 1907 | input_wakeup_procfs_readers(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1908 | |
| 1909 | mutex_unlock(&input_mutex); |
| 1910 | |
| 1911 | device_unregister(&dev->dev); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1912 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1913 | EXPORT_SYMBOL(input_unregister_device); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1914 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1915 | /** |
| 1916 | * input_register_handler - register a new input handler |
| 1917 | * @handler: handler to be registered |
| 1918 | * |
| 1919 | * This function registers a new input handler (interface) for input |
| 1920 | * devices in the system and attaches it to all input devices that |
| 1921 | * are compatible with the handler. |
| 1922 | */ |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 1923 | int input_register_handler(struct input_handler *handler) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1924 | { |
| 1925 | struct input_dev *dev; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1926 | int retval; |
| 1927 | |
| 1928 | retval = mutex_lock_interruptible(&input_mutex); |
| 1929 | if (retval) |
| 1930 | return retval; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1931 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1932 | INIT_LIST_HEAD(&handler->h_list); |
| 1933 | |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 1934 | if (handler->fops != NULL) { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1935 | if (input_table[handler->minor >> 5]) { |
| 1936 | retval = -EBUSY; |
| 1937 | goto out; |
| 1938 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1939 | input_table[handler->minor >> 5] = handler; |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 1940 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1941 | |
| 1942 | list_add_tail(&handler->node, &input_handler_list); |
| 1943 | |
| 1944 | list_for_each_entry(dev, &input_dev_list, node) |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1945 | input_attach_handler(dev, handler); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1946 | |
| 1947 | input_wakeup_procfs_readers(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1948 | |
| 1949 | out: |
| 1950 | mutex_unlock(&input_mutex); |
| 1951 | return retval; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1952 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1953 | EXPORT_SYMBOL(input_register_handler); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1954 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1955 | /** |
| 1956 | * input_unregister_handler - unregisters an input handler |
| 1957 | * @handler: handler to be unregistered |
| 1958 | * |
| 1959 | * This function disconnects a handler from its input devices and |
| 1960 | * removes it from lists of known handlers. |
| 1961 | */ |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1962 | void input_unregister_handler(struct input_handler *handler) |
| 1963 | { |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1964 | struct input_handle *handle, *next; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1965 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1966 | mutex_lock(&input_mutex); |
| 1967 | |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1968 | list_for_each_entry_safe(handle, next, &handler->h_list, h_node) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1969 | handler->disconnect(handle); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1970 | WARN_ON(!list_empty(&handler->h_list)); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1971 | |
| 1972 | list_del_init(&handler->node); |
| 1973 | |
| 1974 | if (handler->fops != NULL) |
| 1975 | input_table[handler->minor >> 5] = NULL; |
| 1976 | |
| 1977 | input_wakeup_procfs_readers(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1978 | |
| 1979 | mutex_unlock(&input_mutex); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1980 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1981 | EXPORT_SYMBOL(input_unregister_handler); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1982 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1983 | /** |
Dmitry Torokhov | 66d2a59 | 2009-12-01 21:54:35 -0800 | [diff] [blame] | 1984 | * input_handler_for_each_handle - handle iterator |
| 1985 | * @handler: input handler to iterate |
| 1986 | * @data: data for the callback |
| 1987 | * @fn: function to be called for each handle |
| 1988 | * |
| 1989 | * Iterate over @bus's list of devices, and call @fn for each, passing |
| 1990 | * it @data and stop when @fn returns a non-zero value. The function is |
| 1991 | * using RCU to traverse the list and therefore may be usind in atonic |
| 1992 | * contexts. The @fn callback is invoked from RCU critical section and |
| 1993 | * thus must not sleep. |
| 1994 | */ |
| 1995 | int input_handler_for_each_handle(struct input_handler *handler, void *data, |
| 1996 | int (*fn)(struct input_handle *, void *)) |
| 1997 | { |
| 1998 | struct input_handle *handle; |
| 1999 | int retval = 0; |
| 2000 | |
| 2001 | rcu_read_lock(); |
| 2002 | |
| 2003 | list_for_each_entry_rcu(handle, &handler->h_list, h_node) { |
| 2004 | retval = fn(handle, data); |
| 2005 | if (retval) |
| 2006 | break; |
| 2007 | } |
| 2008 | |
| 2009 | rcu_read_unlock(); |
| 2010 | |
| 2011 | return retval; |
| 2012 | } |
| 2013 | EXPORT_SYMBOL(input_handler_for_each_handle); |
| 2014 | |
| 2015 | /** |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2016 | * input_register_handle - register a new input handle |
| 2017 | * @handle: handle to register |
| 2018 | * |
| 2019 | * This function puts a new input handle onto device's |
| 2020 | * and handler's lists so that events can flow through |
| 2021 | * it once it is opened using input_open_device(). |
| 2022 | * |
| 2023 | * This function is supposed to be called from handler's |
| 2024 | * connect() method. |
| 2025 | */ |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2026 | int input_register_handle(struct input_handle *handle) |
| 2027 | { |
| 2028 | struct input_handler *handler = handle->handler; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2029 | struct input_dev *dev = handle->dev; |
| 2030 | int error; |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2031 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2032 | /* |
| 2033 | * We take dev->mutex here to prevent race with |
| 2034 | * input_release_device(). |
| 2035 | */ |
| 2036 | error = mutex_lock_interruptible(&dev->mutex); |
| 2037 | if (error) |
| 2038 | return error; |
Dmitry Torokhov | ef7995f | 2010-01-29 23:59:12 -0800 | [diff] [blame] | 2039 | |
| 2040 | /* |
| 2041 | * Filters go to the head of the list, normal handlers |
| 2042 | * to the tail. |
| 2043 | */ |
| 2044 | if (handler->filter) |
| 2045 | list_add_rcu(&handle->d_node, &dev->h_list); |
| 2046 | else |
| 2047 | list_add_tail_rcu(&handle->d_node, &dev->h_list); |
| 2048 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2049 | mutex_unlock(&dev->mutex); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2050 | |
| 2051 | /* |
| 2052 | * Since we are supposed to be called from ->connect() |
| 2053 | * which is mutually exclusive with ->disconnect() |
| 2054 | * we can't be racing with input_unregister_handle() |
| 2055 | * and so separate lock is not needed here. |
| 2056 | */ |
Dmitry Torokhov | 66d2a59 | 2009-12-01 21:54:35 -0800 | [diff] [blame] | 2057 | list_add_tail_rcu(&handle->h_node, &handler->h_list); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2058 | |
| 2059 | if (handler->start) |
| 2060 | handler->start(handle); |
| 2061 | |
| 2062 | return 0; |
| 2063 | } |
| 2064 | EXPORT_SYMBOL(input_register_handle); |
| 2065 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2066 | /** |
| 2067 | * input_unregister_handle - unregister an input handle |
| 2068 | * @handle: handle to unregister |
| 2069 | * |
| 2070 | * This function removes input handle from device's |
| 2071 | * and handler's lists. |
| 2072 | * |
| 2073 | * This function is supposed to be called from handler's |
| 2074 | * disconnect() method. |
| 2075 | */ |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2076 | void input_unregister_handle(struct input_handle *handle) |
| 2077 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2078 | struct input_dev *dev = handle->dev; |
| 2079 | |
Dmitry Torokhov | 66d2a59 | 2009-12-01 21:54:35 -0800 | [diff] [blame] | 2080 | list_del_rcu(&handle->h_node); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2081 | |
| 2082 | /* |
| 2083 | * Take dev->mutex to prevent race with input_release_device(). |
| 2084 | */ |
| 2085 | mutex_lock(&dev->mutex); |
| 2086 | list_del_rcu(&handle->d_node); |
| 2087 | mutex_unlock(&dev->mutex); |
Dmitry Torokhov | 66d2a59 | 2009-12-01 21:54:35 -0800 | [diff] [blame] | 2088 | |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 2089 | synchronize_rcu(); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2090 | } |
| 2091 | EXPORT_SYMBOL(input_unregister_handle); |
| 2092 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2093 | static int input_open_file(struct inode *inode, struct file *file) |
| 2094 | { |
Jonathan Corbet | 2edbf85 | 2008-05-15 10:37:16 -0600 | [diff] [blame] | 2095 | struct input_handler *handler; |
Arjan van de Ven | 99ac48f | 2006-03-28 01:56:41 -0800 | [diff] [blame] | 2096 | const struct file_operations *old_fops, *new_fops = NULL; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2097 | int err; |
| 2098 | |
Arnd Bergmann | 2f2177c | 2010-03-09 20:38:48 -0800 | [diff] [blame] | 2099 | err = mutex_lock_interruptible(&input_mutex); |
| 2100 | if (err) |
| 2101 | return err; |
| 2102 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2103 | /* No load-on-demand here? */ |
Jonathan Corbet | 2edbf85 | 2008-05-15 10:37:16 -0600 | [diff] [blame] | 2104 | handler = input_table[iminor(inode) >> 5]; |
Arnd Bergmann | 2f2177c | 2010-03-09 20:38:48 -0800 | [diff] [blame] | 2105 | if (handler) |
| 2106 | new_fops = fops_get(handler->fops); |
| 2107 | |
| 2108 | mutex_unlock(&input_mutex); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2109 | |
| 2110 | /* |
| 2111 | * That's _really_ odd. Usually NULL ->open means "nothing special", |
| 2112 | * not "no device". Oh, well... |
| 2113 | */ |
Arnd Bergmann | 2f2177c | 2010-03-09 20:38:48 -0800 | [diff] [blame] | 2114 | if (!new_fops || !new_fops->open) { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2115 | fops_put(new_fops); |
Jonathan Corbet | 2edbf85 | 2008-05-15 10:37:16 -0600 | [diff] [blame] | 2116 | err = -ENODEV; |
| 2117 | goto out; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2118 | } |
Arnd Bergmann | 2f2177c | 2010-03-09 20:38:48 -0800 | [diff] [blame] | 2119 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2120 | old_fops = file->f_op; |
| 2121 | file->f_op = new_fops; |
| 2122 | |
| 2123 | err = new_fops->open(inode, file); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2124 | if (err) { |
| 2125 | fops_put(file->f_op); |
| 2126 | file->f_op = fops_get(old_fops); |
| 2127 | } |
| 2128 | fops_put(old_fops); |
Jonathan Corbet | 2edbf85 | 2008-05-15 10:37:16 -0600 | [diff] [blame] | 2129 | out: |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2130 | return err; |
| 2131 | } |
| 2132 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 2133 | static const struct file_operations input_fops = { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2134 | .owner = THIS_MODULE, |
| 2135 | .open = input_open_file, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 2136 | .llseek = noop_llseek, |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2137 | }; |
| 2138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | static int __init input_init(void) |
| 2140 | { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2141 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2143 | err = class_register(&input_class); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 2144 | if (err) { |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 2145 | pr_err("unable to register input_dev class\n"); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 2146 | return err; |
| 2147 | } |
| 2148 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2149 | err = input_proc_init(); |
| 2150 | if (err) |
Greg Kroah-Hartman | b0fdfeb | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2151 | goto fail1; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2152 | |
| 2153 | err = register_chrdev(INPUT_MAJOR, "input", &input_fops); |
| 2154 | if (err) { |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 2155 | pr_err("unable to register char major %d", INPUT_MAJOR); |
Greg Kroah-Hartman | b0fdfeb | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2156 | goto fail2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2157 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2158 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2159 | return 0; |
| 2160 | |
Greg Kroah-Hartman | b0fdfeb | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2161 | fail2: input_proc_exit(); |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2162 | fail1: class_unregister(&input_class); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2163 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | } |
| 2165 | |
| 2166 | static void __exit input_exit(void) |
| 2167 | { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2168 | input_proc_exit(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2169 | unregister_chrdev(INPUT_MAJOR, "input"); |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2170 | class_unregister(&input_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2171 | } |
| 2172 | |
| 2173 | subsys_initcall(input_init); |
| 2174 | module_exit(input_exit); |