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> |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 17 | #include <linux/idr.h> |
Henrik Rydberg | 47c78e8 | 2010-11-27 09:16:48 +0100 | [diff] [blame] | 18 | #include <linux/input/mt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 20 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/random.h> |
| 22 | #include <linux/major.h> |
| 23 | #include <linux/proc_fs.h> |
Alexey Dobriyan | a99bbaf | 2009-10-04 16:11:37 +0400 | [diff] [blame] | 24 | #include <linux/sched.h> |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 25 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/poll.h> |
| 27 | #include <linux/device.h> |
Jes Sorensen | e676c23 | 2006-02-19 00:21:46 -0500 | [diff] [blame] | 28 | #include <linux/mutex.h> |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 29 | #include <linux/rcupdate.h> |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 30 | #include "input-compat.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
| 32 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); |
| 33 | MODULE_DESCRIPTION("Input core"); |
| 34 | MODULE_LICENSE("GPL"); |
| 35 | |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 36 | #define INPUT_MAX_CHAR_DEVICES 1024 |
| 37 | #define INPUT_FIRST_DYNAMIC_DEV 256 |
| 38 | static DEFINE_IDA(input_ida); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | static LIST_HEAD(input_dev_list); |
| 41 | static LIST_HEAD(input_handler_list); |
| 42 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 43 | /* |
| 44 | * input_mutex protects access to both input_dev_list and input_handler_list. |
| 45 | * This also causes input_[un]register_device and input_[un]register_handler |
| 46 | * be mutually exclusive which simplifies locking in drivers implementing |
| 47 | * input handlers. |
| 48 | */ |
| 49 | static DEFINE_MUTEX(input_mutex); |
| 50 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 51 | static const struct input_value input_value_sync = { EV_SYN, SYN_REPORT, 1 }; |
| 52 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 53 | static inline int is_event_supported(unsigned int code, |
| 54 | unsigned long *bm, unsigned int max) |
| 55 | { |
| 56 | return code <= max && test_bit(code, bm); |
| 57 | } |
| 58 | |
| 59 | static int input_defuzz_abs_event(int value, int old_val, int fuzz) |
| 60 | { |
| 61 | if (fuzz) { |
| 62 | if (value > old_val - fuzz / 2 && value < old_val + fuzz / 2) |
| 63 | return old_val; |
| 64 | |
| 65 | if (value > old_val - fuzz && value < old_val + fuzz) |
| 66 | return (old_val * 3 + value) / 4; |
| 67 | |
| 68 | if (value > old_val - fuzz * 2 && value < old_val + fuzz * 2) |
| 69 | return (old_val + value) / 2; |
| 70 | } |
| 71 | |
| 72 | return value; |
| 73 | } |
| 74 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 75 | static void input_start_autorepeat(struct input_dev *dev, int code) |
| 76 | { |
| 77 | if (test_bit(EV_REP, dev->evbit) && |
| 78 | dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && |
| 79 | dev->timer.data) { |
| 80 | dev->repeat_key = code; |
| 81 | mod_timer(&dev->timer, |
| 82 | jiffies + msecs_to_jiffies(dev->rep[REP_DELAY])); |
| 83 | } |
| 84 | } |
| 85 | |
Johannes Berg | e7b5c1e | 2009-01-29 23:17:52 -0800 | [diff] [blame] | 86 | static void input_stop_autorepeat(struct input_dev *dev) |
| 87 | { |
| 88 | del_timer(&dev->timer); |
| 89 | } |
| 90 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 91 | /* |
| 92 | * Pass event first through all filters and then, if event has not been |
| 93 | * filtered out, through all open handles. This function is called with |
| 94 | * dev->event_lock held and interrupts disabled. |
| 95 | */ |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 96 | static unsigned int input_to_handler(struct input_handle *handle, |
| 97 | struct input_value *vals, unsigned int count) |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 98 | { |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 99 | struct input_handler *handler = handle->handler; |
| 100 | struct input_value *end = vals; |
| 101 | struct input_value *v; |
| 102 | |
| 103 | for (v = vals; v != vals + count; v++) { |
| 104 | if (handler->filter && |
| 105 | handler->filter(handle, v->type, v->code, v->value)) |
| 106 | continue; |
| 107 | if (end != v) |
| 108 | *end = *v; |
| 109 | end++; |
| 110 | } |
| 111 | |
| 112 | count = end - vals; |
| 113 | if (!count) |
| 114 | return 0; |
| 115 | |
| 116 | if (handler->events) |
| 117 | handler->events(handle, vals, count); |
| 118 | else if (handler->event) |
| 119 | for (v = vals; v != end; v++) |
| 120 | handler->event(handle, v->type, v->code, v->value); |
| 121 | |
| 122 | return count; |
| 123 | } |
| 124 | |
| 125 | /* |
| 126 | * Pass values first through all filters and then, if event has not been |
| 127 | * filtered out, through all open handles. This function is called with |
| 128 | * dev->event_lock held and interrupts disabled. |
| 129 | */ |
| 130 | static void input_pass_values(struct input_dev *dev, |
| 131 | struct input_value *vals, unsigned int count) |
| 132 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 133 | struct input_handle *handle; |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 134 | struct input_value *v; |
| 135 | |
| 136 | if (!count) |
| 137 | return; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 138 | |
| 139 | rcu_read_lock(); |
| 140 | |
| 141 | handle = rcu_dereference(dev->grab); |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 142 | if (handle) { |
| 143 | count = input_to_handler(handle, vals, count); |
| 144 | } else { |
| 145 | list_for_each_entry_rcu(handle, &dev->h_list, d_node) |
| 146 | if (handle->open) |
| 147 | count = input_to_handler(handle, vals, count); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | rcu_read_unlock(); |
Henrik Rydberg | 352ac4b | 2012-08-10 21:36:15 +0200 | [diff] [blame] | 151 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 152 | add_input_randomness(vals->type, vals->code, vals->value); |
Henrik Rydberg | 352ac4b | 2012-08-10 21:36:15 +0200 | [diff] [blame] | 153 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 154 | /* trigger auto repeat for key events */ |
| 155 | for (v = vals; v != vals + count; v++) { |
| 156 | if (v->type == EV_KEY && v->value != 2) { |
| 157 | if (v->value) |
| 158 | input_start_autorepeat(dev, v->code); |
| 159 | else |
| 160 | input_stop_autorepeat(dev); |
| 161 | } |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | static void input_pass_event(struct input_dev *dev, |
| 166 | unsigned int type, unsigned int code, int value) |
| 167 | { |
| 168 | struct input_value vals[] = { { type, code, value } }; |
| 169 | |
| 170 | input_pass_values(dev, vals, ARRAY_SIZE(vals)); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | /* |
| 174 | * Generate software autorepeat event. Note that we take |
| 175 | * dev->event_lock here to avoid racing with input_event |
| 176 | * which may cause keys get "stuck". |
| 177 | */ |
| 178 | static void input_repeat_key(unsigned long data) |
| 179 | { |
| 180 | struct input_dev *dev = (void *) data; |
| 181 | unsigned long flags; |
| 182 | |
| 183 | spin_lock_irqsave(&dev->event_lock, flags); |
| 184 | |
| 185 | if (test_bit(dev->repeat_key, dev->key) && |
| 186 | is_event_supported(dev->repeat_key, dev->keybit, KEY_MAX)) { |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 187 | struct input_value vals[] = { |
| 188 | { EV_KEY, dev->repeat_key, 2 }, |
| 189 | input_value_sync |
| 190 | }; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 191 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 192 | input_pass_values(dev, vals, ARRAY_SIZE(vals)); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 193 | |
| 194 | if (dev->rep[REP_PERIOD]) |
| 195 | mod_timer(&dev->timer, jiffies + |
| 196 | msecs_to_jiffies(dev->rep[REP_PERIOD])); |
| 197 | } |
| 198 | |
| 199 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 200 | } |
| 201 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 202 | #define INPUT_IGNORE_EVENT 0 |
| 203 | #define INPUT_PASS_TO_HANDLERS 1 |
| 204 | #define INPUT_PASS_TO_DEVICE 2 |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 205 | #define INPUT_SLOT 4 |
| 206 | #define INPUT_FLUSH 8 |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 207 | #define INPUT_PASS_TO_ALL (INPUT_PASS_TO_HANDLERS | INPUT_PASS_TO_DEVICE) |
| 208 | |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 209 | static int input_handle_abs_event(struct input_dev *dev, |
| 210 | unsigned int code, int *pval) |
| 211 | { |
Henrik Rydberg | 8d18fba | 2012-09-15 15:15:58 +0200 | [diff] [blame] | 212 | struct input_mt *mt = dev->mt; |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 213 | bool is_mt_event; |
| 214 | int *pold; |
| 215 | |
| 216 | if (code == ABS_MT_SLOT) { |
| 217 | /* |
| 218 | * "Stage" the event; we'll flush it later, when we |
Dmitry Torokhov | 144c0f8 | 2010-09-03 10:31:05 -0700 | [diff] [blame] | 219 | * get actual touch data. |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 220 | */ |
Henrik Rydberg | 8d18fba | 2012-09-15 15:15:58 +0200 | [diff] [blame] | 221 | if (mt && *pval >= 0 && *pval < mt->num_slots) |
| 222 | mt->slot = *pval; |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 223 | |
| 224 | return INPUT_IGNORE_EVENT; |
| 225 | } |
| 226 | |
Henrik Rydberg | b89529a | 2012-01-12 19:40:34 +0100 | [diff] [blame] | 227 | is_mt_event = input_is_mt_value(code); |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 228 | |
| 229 | if (!is_mt_event) { |
Daniel Mack | d31b286 | 2010-08-02 20:18:21 -0700 | [diff] [blame] | 230 | pold = &dev->absinfo[code].value; |
Henrik Rydberg | 8d18fba | 2012-09-15 15:15:58 +0200 | [diff] [blame] | 231 | } else if (mt) { |
| 232 | pold = &mt->slots[mt->slot].abs[code - ABS_MT_FIRST]; |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 233 | } else { |
| 234 | /* |
Dmitry Torokhov | 144c0f8 | 2010-09-03 10:31:05 -0700 | [diff] [blame] | 235 | * Bypass filtering for multi-touch events when |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 236 | * not employing slots. |
| 237 | */ |
| 238 | pold = NULL; |
| 239 | } |
| 240 | |
| 241 | if (pold) { |
| 242 | *pval = input_defuzz_abs_event(*pval, *pold, |
Daniel Mack | d31b286 | 2010-08-02 20:18:21 -0700 | [diff] [blame] | 243 | dev->absinfo[code].fuzz); |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 244 | if (*pold == *pval) |
| 245 | return INPUT_IGNORE_EVENT; |
| 246 | |
| 247 | *pold = *pval; |
| 248 | } |
| 249 | |
| 250 | /* Flush pending "slot" event */ |
Henrik Rydberg | 8d18fba | 2012-09-15 15:15:58 +0200 | [diff] [blame] | 251 | if (is_mt_event && mt && mt->slot != input_abs_get_val(dev, ABS_MT_SLOT)) { |
| 252 | input_abs_set_val(dev, ABS_MT_SLOT, mt->slot); |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 253 | return INPUT_PASS_TO_HANDLERS | INPUT_SLOT; |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | return INPUT_PASS_TO_HANDLERS; |
| 257 | } |
| 258 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 259 | static int input_get_disposition(struct input_dev *dev, |
| 260 | unsigned int type, unsigned int code, int value) |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 261 | { |
| 262 | int disposition = INPUT_IGNORE_EVENT; |
| 263 | |
| 264 | switch (type) { |
| 265 | |
| 266 | case EV_SYN: |
| 267 | switch (code) { |
| 268 | case SYN_CONFIG: |
| 269 | disposition = INPUT_PASS_TO_ALL; |
| 270 | break; |
| 271 | |
| 272 | case SYN_REPORT: |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 273 | disposition = INPUT_PASS_TO_HANDLERS | INPUT_FLUSH; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 274 | break; |
Henrik Rydberg | 5e5ee68 | 2009-04-28 07:47:33 -0700 | [diff] [blame] | 275 | case SYN_MT_REPORT: |
Henrik Rydberg | 5e5ee68 | 2009-04-28 07:47:33 -0700 | [diff] [blame] | 276 | disposition = INPUT_PASS_TO_HANDLERS; |
| 277 | break; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 278 | } |
| 279 | break; |
| 280 | |
| 281 | case EV_KEY: |
Henrik Rydberg | 0672120 | 2012-08-10 21:39:38 +0200 | [diff] [blame] | 282 | if (is_event_supported(code, dev->keybit, KEY_MAX)) { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 283 | |
Henrik Rydberg | 0672120 | 2012-08-10 21:39:38 +0200 | [diff] [blame] | 284 | /* auto-repeat bypasses state updates */ |
| 285 | if (value == 2) { |
| 286 | disposition = INPUT_PASS_TO_HANDLERS; |
| 287 | break; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 288 | } |
| 289 | |
Henrik Rydberg | 0672120 | 2012-08-10 21:39:38 +0200 | [diff] [blame] | 290 | if (!!test_bit(code, dev->key) != !!value) { |
| 291 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 292 | __change_bit(code, dev->key); |
Henrik Rydberg | 0672120 | 2012-08-10 21:39:38 +0200 | [diff] [blame] | 293 | disposition = INPUT_PASS_TO_HANDLERS; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 294 | } |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 295 | } |
| 296 | break; |
| 297 | |
| 298 | case EV_SW: |
| 299 | if (is_event_supported(code, dev->swbit, SW_MAX) && |
Henrik Rydberg | 0672120 | 2012-08-10 21:39:38 +0200 | [diff] [blame] | 300 | !!test_bit(code, dev->sw) != !!value) { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 301 | |
| 302 | __change_bit(code, dev->sw); |
| 303 | disposition = INPUT_PASS_TO_HANDLERS; |
| 304 | } |
| 305 | break; |
| 306 | |
| 307 | case EV_ABS: |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 308 | if (is_event_supported(code, dev->absbit, ABS_MAX)) |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 309 | disposition = input_handle_abs_event(dev, code, &value); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 310 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 311 | break; |
| 312 | |
| 313 | case EV_REL: |
| 314 | if (is_event_supported(code, dev->relbit, REL_MAX) && value) |
| 315 | disposition = INPUT_PASS_TO_HANDLERS; |
| 316 | |
| 317 | break; |
| 318 | |
| 319 | case EV_MSC: |
| 320 | if (is_event_supported(code, dev->mscbit, MSC_MAX)) |
| 321 | disposition = INPUT_PASS_TO_ALL; |
| 322 | |
| 323 | break; |
| 324 | |
| 325 | case EV_LED: |
| 326 | if (is_event_supported(code, dev->ledbit, LED_MAX) && |
Henrik Rydberg | 0672120 | 2012-08-10 21:39:38 +0200 | [diff] [blame] | 327 | !!test_bit(code, dev->led) != !!value) { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 328 | |
| 329 | __change_bit(code, dev->led); |
| 330 | disposition = INPUT_PASS_TO_ALL; |
| 331 | } |
| 332 | break; |
| 333 | |
| 334 | case EV_SND: |
| 335 | if (is_event_supported(code, dev->sndbit, SND_MAX)) { |
| 336 | |
| 337 | if (!!test_bit(code, dev->snd) != !!value) |
| 338 | __change_bit(code, dev->snd); |
| 339 | disposition = INPUT_PASS_TO_ALL; |
| 340 | } |
| 341 | break; |
| 342 | |
| 343 | case EV_REP: |
| 344 | if (code <= REP_MAX && value >= 0 && dev->rep[code] != value) { |
| 345 | dev->rep[code] = value; |
| 346 | disposition = INPUT_PASS_TO_ALL; |
| 347 | } |
| 348 | break; |
| 349 | |
| 350 | case EV_FF: |
| 351 | if (value >= 0) |
| 352 | disposition = INPUT_PASS_TO_ALL; |
| 353 | break; |
Richard Purdie | ed2fa4d | 2008-01-03 10:46:21 -0500 | [diff] [blame] | 354 | |
| 355 | case EV_PWR: |
| 356 | disposition = INPUT_PASS_TO_ALL; |
| 357 | break; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 358 | } |
| 359 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 360 | return disposition; |
| 361 | } |
| 362 | |
| 363 | static void input_handle_event(struct input_dev *dev, |
| 364 | unsigned int type, unsigned int code, int value) |
| 365 | { |
| 366 | int disposition; |
| 367 | |
| 368 | disposition = input_get_disposition(dev, type, code, value); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 369 | |
| 370 | if ((disposition & INPUT_PASS_TO_DEVICE) && dev->event) |
| 371 | dev->event(dev, type, code, value); |
| 372 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 373 | if (!dev->vals) |
| 374 | return; |
| 375 | |
| 376 | if (disposition & INPUT_PASS_TO_HANDLERS) { |
| 377 | struct input_value *v; |
| 378 | |
| 379 | if (disposition & INPUT_SLOT) { |
| 380 | v = &dev->vals[dev->num_vals++]; |
| 381 | v->type = EV_ABS; |
| 382 | v->code = ABS_MT_SLOT; |
| 383 | v->value = dev->mt->slot; |
| 384 | } |
| 385 | |
| 386 | v = &dev->vals[dev->num_vals++]; |
| 387 | v->type = type; |
| 388 | v->code = code; |
| 389 | v->value = value; |
| 390 | } |
| 391 | |
| 392 | if (disposition & INPUT_FLUSH) { |
| 393 | if (dev->num_vals >= 2) |
| 394 | input_pass_values(dev, dev->vals, dev->num_vals); |
| 395 | dev->num_vals = 0; |
| 396 | } else if (dev->num_vals >= dev->max_vals - 2) { |
| 397 | dev->vals[dev->num_vals++] = input_value_sync; |
| 398 | input_pass_values(dev, dev->vals, dev->num_vals); |
| 399 | dev->num_vals = 0; |
| 400 | } |
| 401 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 402 | } |
| 403 | |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 404 | /** |
| 405 | * input_event() - report new input event |
Dmitry Torokhov | 1447190 | 2006-11-02 23:26:55 -0500 | [diff] [blame] | 406 | * @dev: device that generated the event |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 407 | * @type: type of the event |
| 408 | * @code: event code |
| 409 | * @value: value of the event |
| 410 | * |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 411 | * This function should be used by drivers implementing various input |
Dmitry Torokhov | df2d463 | 2009-12-11 21:57:31 -0800 | [diff] [blame] | 412 | * devices to report input events. See also input_inject_event(). |
| 413 | * |
| 414 | * NOTE: input_event() may be safely used right after input device was |
| 415 | * allocated with input_allocate_device(), even before it is registered |
| 416 | * with input_register_device(), but the event will not reach any of the |
| 417 | * input handlers. Such early invocation of input_event() may be used |
| 418 | * to 'seed' initial state of a switch or initial position of absolute |
| 419 | * axis, etc. |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 420 | */ |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 421 | void input_event(struct input_dev *dev, |
| 422 | unsigned int type, unsigned int code, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 424 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 426 | if (is_event_supported(type, dev->evbit, EV_MAX)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 428 | spin_lock_irqsave(&dev->event_lock, flags); |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 429 | input_handle_event(dev, type, code, value); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 430 | spin_unlock_irqrestore(&dev->event_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 433 | EXPORT_SYMBOL(input_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 435 | /** |
| 436 | * input_inject_event() - send input event from input handler |
| 437 | * @handle: input handle to send event through |
| 438 | * @type: type of the event |
| 439 | * @code: event code |
| 440 | * @value: value of the event |
| 441 | * |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 442 | * Similar to input_event() but will ignore event if device is |
| 443 | * "grabbed" and handle injecting event is not the one that owns |
| 444 | * the device. |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 445 | */ |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 446 | void input_inject_event(struct input_handle *handle, |
| 447 | unsigned int type, unsigned int code, int value) |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 448 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 449 | struct input_dev *dev = handle->dev; |
| 450 | struct input_handle *grab; |
| 451 | unsigned long flags; |
| 452 | |
| 453 | if (is_event_supported(type, dev->evbit, EV_MAX)) { |
| 454 | spin_lock_irqsave(&dev->event_lock, flags); |
| 455 | |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 456 | rcu_read_lock(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 457 | grab = rcu_dereference(dev->grab); |
| 458 | if (!grab || grab == handle) |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 459 | input_handle_event(dev, type, code, value); |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 460 | rcu_read_unlock(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 461 | |
| 462 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 463 | } |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 464 | } |
| 465 | EXPORT_SYMBOL(input_inject_event); |
| 466 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 467 | /** |
Daniel Mack | d31b286 | 2010-08-02 20:18:21 -0700 | [diff] [blame] | 468 | * input_alloc_absinfo - allocates array of input_absinfo structs |
| 469 | * @dev: the input device emitting absolute events |
| 470 | * |
| 471 | * If the absinfo struct the caller asked for is already allocated, this |
| 472 | * functions will not do anything. |
| 473 | */ |
| 474 | void input_alloc_absinfo(struct input_dev *dev) |
| 475 | { |
| 476 | if (!dev->absinfo) |
| 477 | dev->absinfo = kcalloc(ABS_CNT, sizeof(struct input_absinfo), |
| 478 | GFP_KERNEL); |
| 479 | |
| 480 | WARN(!dev->absinfo, "%s(): kcalloc() failed?\n", __func__); |
| 481 | } |
| 482 | EXPORT_SYMBOL(input_alloc_absinfo); |
| 483 | |
| 484 | void input_set_abs_params(struct input_dev *dev, unsigned int axis, |
| 485 | int min, int max, int fuzz, int flat) |
| 486 | { |
| 487 | struct input_absinfo *absinfo; |
| 488 | |
| 489 | input_alloc_absinfo(dev); |
| 490 | if (!dev->absinfo) |
| 491 | return; |
| 492 | |
| 493 | absinfo = &dev->absinfo[axis]; |
| 494 | absinfo->minimum = min; |
| 495 | absinfo->maximum = max; |
| 496 | absinfo->fuzz = fuzz; |
| 497 | absinfo->flat = flat; |
| 498 | |
| 499 | dev->absbit[BIT_WORD(axis)] |= BIT_MASK(axis); |
| 500 | } |
| 501 | EXPORT_SYMBOL(input_set_abs_params); |
| 502 | |
| 503 | |
| 504 | /** |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 505 | * input_grab_device - grabs device for exclusive use |
| 506 | * @handle: input handle that wants to own the device |
| 507 | * |
| 508 | * When a device is grabbed by an input handle all events generated by |
| 509 | * the device are delivered only to this handle. Also events injected |
| 510 | * by other input handles are ignored while device is grabbed. |
| 511 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | int input_grab_device(struct input_handle *handle) |
| 513 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 514 | struct input_dev *dev = handle->dev; |
| 515 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 517 | retval = mutex_lock_interruptible(&dev->mutex); |
| 518 | if (retval) |
| 519 | return retval; |
| 520 | |
| 521 | if (dev->grab) { |
| 522 | retval = -EBUSY; |
| 523 | goto out; |
| 524 | } |
| 525 | |
| 526 | rcu_assign_pointer(dev->grab, handle); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 527 | |
| 528 | out: |
| 529 | mutex_unlock(&dev->mutex); |
| 530 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 532 | EXPORT_SYMBOL(input_grab_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 534 | static void __input_release_device(struct input_handle *handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | { |
Andrew Morton | a2b2ed2 | 2006-07-15 01:17:38 -0400 | [diff] [blame] | 536 | struct input_dev *dev = handle->dev; |
Dmitry Torokhov | adc4633 | 2012-10-24 23:53:01 -0700 | [diff] [blame] | 537 | struct input_handle *grabber; |
Dmitry Torokhov | c7e8dc6 | 2006-07-06 00:21:03 -0400 | [diff] [blame] | 538 | |
Dmitry Torokhov | adc4633 | 2012-10-24 23:53:01 -0700 | [diff] [blame] | 539 | grabber = rcu_dereference_protected(dev->grab, |
| 540 | lockdep_is_held(&dev->mutex)); |
| 541 | if (grabber == handle) { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 542 | rcu_assign_pointer(dev->grab, NULL); |
| 543 | /* Make sure input_pass_event() notices that grab is gone */ |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 544 | synchronize_rcu(); |
Andrew Morton | a2b2ed2 | 2006-07-15 01:17:38 -0400 | [diff] [blame] | 545 | |
| 546 | list_for_each_entry(handle, &dev->h_list, d_node) |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 547 | if (handle->open && handle->handler->start) |
Dmitry Torokhov | c7e8dc6 | 2006-07-06 00:21:03 -0400 | [diff] [blame] | 548 | handle->handler->start(handle); |
| 549 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | } |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 551 | |
| 552 | /** |
| 553 | * input_release_device - release previously grabbed device |
| 554 | * @handle: input handle that owns the device |
| 555 | * |
| 556 | * Releases previously grabbed device so that other input handles can |
| 557 | * start receiving input events. Upon release all handlers attached |
| 558 | * to the device have their start() method called so they have a change |
| 559 | * to synchronize device state with the rest of the system. |
| 560 | */ |
| 561 | void input_release_device(struct input_handle *handle) |
| 562 | { |
| 563 | struct input_dev *dev = handle->dev; |
| 564 | |
| 565 | mutex_lock(&dev->mutex); |
| 566 | __input_release_device(handle); |
| 567 | mutex_unlock(&dev->mutex); |
| 568 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 569 | EXPORT_SYMBOL(input_release_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 571 | /** |
| 572 | * input_open_device - open input device |
| 573 | * @handle: handle through which device is being accessed |
| 574 | * |
| 575 | * This function should be called by input handlers when they |
| 576 | * want to start receive events from given input device. |
| 577 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | int input_open_device(struct input_handle *handle) |
| 579 | { |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 580 | struct input_dev *dev = handle->dev; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 581 | int retval; |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 582 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 583 | retval = mutex_lock_interruptible(&dev->mutex); |
| 584 | if (retval) |
| 585 | return retval; |
| 586 | |
| 587 | if (dev->going_away) { |
| 588 | retval = -ENODEV; |
| 589 | goto out; |
| 590 | } |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 591 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | handle->open++; |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 593 | |
| 594 | if (!dev->users++ && dev->open) |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 595 | retval = dev->open(dev); |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 596 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 597 | if (retval) { |
| 598 | dev->users--; |
| 599 | if (!--handle->open) { |
| 600 | /* |
| 601 | * Make sure we are not delivering any more events |
| 602 | * through this handle |
| 603 | */ |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 604 | synchronize_rcu(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 605 | } |
| 606 | } |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 607 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 608 | out: |
Jes Sorensen | e676c23 | 2006-02-19 00:21:46 -0500 | [diff] [blame] | 609 | mutex_unlock(&dev->mutex); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 610 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 612 | EXPORT_SYMBOL(input_open_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 614 | int input_flush_device(struct input_handle *handle, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 616 | struct input_dev *dev = handle->dev; |
| 617 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 619 | retval = mutex_lock_interruptible(&dev->mutex); |
| 620 | if (retval) |
| 621 | return retval; |
| 622 | |
| 623 | if (dev->flush) |
| 624 | retval = dev->flush(dev, file); |
| 625 | |
| 626 | mutex_unlock(&dev->mutex); |
| 627 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 629 | EXPORT_SYMBOL(input_flush_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 631 | /** |
| 632 | * input_close_device - close input device |
| 633 | * @handle: handle through which device is being accessed |
| 634 | * |
| 635 | * This function should be called by input handlers when they |
| 636 | * want to stop receive events from given input device. |
| 637 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | void input_close_device(struct input_handle *handle) |
| 639 | { |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 640 | struct input_dev *dev = handle->dev; |
| 641 | |
Jes Sorensen | e676c23 | 2006-02-19 00:21:46 -0500 | [diff] [blame] | 642 | mutex_lock(&dev->mutex); |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 643 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 644 | __input_release_device(handle); |
| 645 | |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 646 | if (!--dev->users && dev->close) |
| 647 | dev->close(dev); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 648 | |
| 649 | if (!--handle->open) { |
| 650 | /* |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 651 | * synchronize_rcu() makes sure that input_pass_event() |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 652 | * completed and that no more input events are delivered |
| 653 | * through this handle |
| 654 | */ |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 655 | synchronize_rcu(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 656 | } |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 657 | |
Jes Sorensen | e676c23 | 2006-02-19 00:21:46 -0500 | [diff] [blame] | 658 | mutex_unlock(&dev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 660 | EXPORT_SYMBOL(input_close_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 662 | /* |
Oliver Neukum | 866d7d7 | 2010-07-01 09:01:50 -0700 | [diff] [blame] | 663 | * Simulate keyup events for all keys that are marked as pressed. |
| 664 | * The function must be called with dev->event_lock held. |
| 665 | */ |
| 666 | static void input_dev_release_keys(struct input_dev *dev) |
| 667 | { |
| 668 | int code; |
| 669 | |
| 670 | if (is_event_supported(EV_KEY, dev->evbit, EV_MAX)) { |
| 671 | for (code = 0; code <= KEY_MAX; code++) { |
| 672 | if (is_event_supported(code, dev->keybit, KEY_MAX) && |
| 673 | __test_and_clear_bit(code, dev->key)) { |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 674 | input_pass_event(dev, EV_KEY, code, 0); |
Oliver Neukum | 866d7d7 | 2010-07-01 09:01:50 -0700 | [diff] [blame] | 675 | } |
| 676 | } |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 677 | input_pass_event(dev, EV_SYN, SYN_REPORT, 1); |
Oliver Neukum | 866d7d7 | 2010-07-01 09:01:50 -0700 | [diff] [blame] | 678 | } |
| 679 | } |
| 680 | |
| 681 | /* |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 682 | * Prepare device for unregistering |
| 683 | */ |
| 684 | static void input_disconnect_device(struct input_dev *dev) |
| 685 | { |
| 686 | struct input_handle *handle; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 687 | |
| 688 | /* |
| 689 | * Mark device as going away. Note that we take dev->mutex here |
| 690 | * not to protect access to dev->going_away but rather to ensure |
| 691 | * that there are no threads in the middle of input_open_device() |
| 692 | */ |
| 693 | mutex_lock(&dev->mutex); |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 694 | dev->going_away = true; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 695 | mutex_unlock(&dev->mutex); |
| 696 | |
| 697 | spin_lock_irq(&dev->event_lock); |
| 698 | |
| 699 | /* |
| 700 | * Simulate keyup events for all pressed keys so that handlers |
| 701 | * are not left with "stuck" keys. The driver may continue |
| 702 | * generate events even after we done here but they will not |
| 703 | * reach any handlers. |
| 704 | */ |
Oliver Neukum | 866d7d7 | 2010-07-01 09:01:50 -0700 | [diff] [blame] | 705 | input_dev_release_keys(dev); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 706 | |
| 707 | list_for_each_entry(handle, &dev->h_list, d_node) |
| 708 | handle->open = 0; |
| 709 | |
| 710 | spin_unlock_irq(&dev->event_lock); |
| 711 | } |
| 712 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 713 | /** |
| 714 | * input_scancode_to_scalar() - converts scancode in &struct input_keymap_entry |
| 715 | * @ke: keymap entry containing scancode to be converted. |
| 716 | * @scancode: pointer to the location where converted scancode should |
| 717 | * be stored. |
| 718 | * |
| 719 | * This function is used to convert scancode stored in &struct keymap_entry |
| 720 | * into scalar form understood by legacy keymap handling methods. These |
| 721 | * methods expect scancodes to be represented as 'unsigned int'. |
| 722 | */ |
| 723 | int input_scancode_to_scalar(const struct input_keymap_entry *ke, |
| 724 | unsigned int *scancode) |
| 725 | { |
| 726 | switch (ke->len) { |
| 727 | case 1: |
| 728 | *scancode = *((u8 *)ke->scancode); |
| 729 | break; |
| 730 | |
| 731 | case 2: |
| 732 | *scancode = *((u16 *)ke->scancode); |
| 733 | break; |
| 734 | |
| 735 | case 4: |
| 736 | *scancode = *((u32 *)ke->scancode); |
| 737 | break; |
| 738 | |
| 739 | default: |
| 740 | return -EINVAL; |
| 741 | } |
| 742 | |
| 743 | return 0; |
| 744 | } |
| 745 | EXPORT_SYMBOL(input_scancode_to_scalar); |
| 746 | |
| 747 | /* |
| 748 | * Those routines handle the default case where no [gs]etkeycode() is |
| 749 | * defined. In this case, an array indexed by the scancode is used. |
| 750 | */ |
| 751 | |
| 752 | static unsigned int input_fetch_keycode(struct input_dev *dev, |
| 753 | unsigned int index) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 754 | { |
| 755 | switch (dev->keycodesize) { |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 756 | case 1: |
| 757 | return ((u8 *)dev->keycode)[index]; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 758 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 759 | case 2: |
| 760 | return ((u16 *)dev->keycode)[index]; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 761 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 762 | default: |
| 763 | return ((u32 *)dev->keycode)[index]; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 764 | } |
| 765 | } |
| 766 | |
| 767 | static int input_default_getkeycode(struct input_dev *dev, |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 768 | struct input_keymap_entry *ke) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 769 | { |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 770 | unsigned int index; |
| 771 | int error; |
| 772 | |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 773 | if (!dev->keycodesize) |
| 774 | return -EINVAL; |
| 775 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 776 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) |
| 777 | index = ke->index; |
| 778 | else { |
| 779 | error = input_scancode_to_scalar(ke, &index); |
| 780 | if (error) |
| 781 | return error; |
| 782 | } |
| 783 | |
| 784 | if (index >= dev->keycodemax) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 785 | return -EINVAL; |
| 786 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 787 | ke->keycode = input_fetch_keycode(dev, index); |
| 788 | ke->index = index; |
| 789 | ke->len = sizeof(index); |
| 790 | memcpy(ke->scancode, &index, sizeof(index)); |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 791 | |
| 792 | return 0; |
| 793 | } |
| 794 | |
| 795 | static int input_default_setkeycode(struct input_dev *dev, |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 796 | const struct input_keymap_entry *ke, |
| 797 | unsigned int *old_keycode) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 798 | { |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 799 | unsigned int index; |
| 800 | int error; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 801 | int i; |
| 802 | |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 803 | if (!dev->keycodesize) |
| 804 | return -EINVAL; |
| 805 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 806 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { |
| 807 | index = ke->index; |
| 808 | } else { |
| 809 | error = input_scancode_to_scalar(ke, &index); |
| 810 | if (error) |
| 811 | return error; |
| 812 | } |
| 813 | |
| 814 | if (index >= dev->keycodemax) |
| 815 | return -EINVAL; |
| 816 | |
Mattia Dongili | de391d1 | 2010-11-18 09:06:43 -0800 | [diff] [blame] | 817 | if (dev->keycodesize < sizeof(ke->keycode) && |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 818 | (ke->keycode >> (dev->keycodesize * 8))) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 819 | return -EINVAL; |
| 820 | |
| 821 | switch (dev->keycodesize) { |
| 822 | case 1: { |
| 823 | u8 *k = (u8 *)dev->keycode; |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 824 | *old_keycode = k[index]; |
| 825 | k[index] = ke->keycode; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 826 | break; |
| 827 | } |
| 828 | case 2: { |
| 829 | u16 *k = (u16 *)dev->keycode; |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 830 | *old_keycode = k[index]; |
| 831 | k[index] = ke->keycode; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 832 | break; |
| 833 | } |
| 834 | default: { |
| 835 | u32 *k = (u32 *)dev->keycode; |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 836 | *old_keycode = k[index]; |
| 837 | k[index] = ke->keycode; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 838 | break; |
| 839 | } |
| 840 | } |
| 841 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 842 | __clear_bit(*old_keycode, dev->keybit); |
| 843 | __set_bit(ke->keycode, dev->keybit); |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 844 | |
| 845 | for (i = 0; i < dev->keycodemax; i++) { |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 846 | if (input_fetch_keycode(dev, i) == *old_keycode) { |
| 847 | __set_bit(*old_keycode, dev->keybit); |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 848 | break; /* Setting the bit twice is useless, so break */ |
| 849 | } |
| 850 | } |
| 851 | |
| 852 | return 0; |
| 853 | } |
| 854 | |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 855 | /** |
| 856 | * input_get_keycode - retrieve keycode currently mapped to a given scancode |
| 857 | * @dev: input device which keymap is being queried |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 858 | * @ke: keymap entry |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 859 | * |
| 860 | * This function should be called by anyone interested in retrieving current |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 861 | * keymap. Presently evdev handlers use it. |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 862 | */ |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 863 | 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] | 864 | { |
Dmitry Torokhov | 2e2e3b9 | 2010-03-21 22:56:15 -0700 | [diff] [blame] | 865 | unsigned long flags; |
| 866 | int retval; |
| 867 | |
| 868 | spin_lock_irqsave(&dev->event_lock, flags); |
Dmitry Torokhov | aebd636 | 2011-01-31 21:06:39 -0800 | [diff] [blame] | 869 | retval = dev->getkeycode(dev, ke); |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 870 | spin_unlock_irqrestore(&dev->event_lock, flags); |
Dmitry Torokhov | aebd636 | 2011-01-31 21:06:39 -0800 | [diff] [blame] | 871 | |
Dmitry Torokhov | 2e2e3b9 | 2010-03-21 22:56:15 -0700 | [diff] [blame] | 872 | return retval; |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 873 | } |
| 874 | EXPORT_SYMBOL(input_get_keycode); |
| 875 | |
| 876 | /** |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 877 | * input_set_keycode - attribute a keycode to a given scancode |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 878 | * @dev: input device which keymap is being updated |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 879 | * @ke: new keymap entry |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 880 | * |
| 881 | * This function should be called by anyone needing to update current |
| 882 | * keymap. Presently keyboard and evdev handlers use it. |
| 883 | */ |
Dmitry Torokhov | 58b9399 | 2010-03-08 22:37:10 -0800 | [diff] [blame] | 884 | int input_set_keycode(struct input_dev *dev, |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 885 | const struct input_keymap_entry *ke) |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 886 | { |
| 887 | unsigned long flags; |
Dmitry Torokhov | fd6cf3d | 2010-07-14 00:25:21 -0700 | [diff] [blame] | 888 | unsigned int old_keycode; |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 889 | int retval; |
| 890 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 891 | if (ke->keycode > KEY_MAX) |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 892 | return -EINVAL; |
| 893 | |
| 894 | spin_lock_irqsave(&dev->event_lock, flags); |
| 895 | |
Dmitry Torokhov | aebd636 | 2011-01-31 21:06:39 -0800 | [diff] [blame] | 896 | retval = dev->setkeycode(dev, ke, &old_keycode); |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 897 | if (retval) |
| 898 | goto out; |
| 899 | |
Dmitry Torokhov | 4f93df4 | 2010-01-05 17:56:00 -0800 | [diff] [blame] | 900 | /* Make sure KEY_RESERVED did not get enabled. */ |
| 901 | __clear_bit(KEY_RESERVED, dev->keybit); |
| 902 | |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 903 | /* |
| 904 | * Simulate keyup event if keycode is not present |
| 905 | * in the keymap anymore |
| 906 | */ |
| 907 | if (test_bit(EV_KEY, dev->evbit) && |
| 908 | !is_event_supported(old_keycode, dev->keybit, KEY_MAX) && |
| 909 | __test_and_clear_bit(old_keycode, dev->key)) { |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 910 | struct input_value vals[] = { |
| 911 | { EV_KEY, old_keycode, 0 }, |
| 912 | input_value_sync |
| 913 | }; |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 914 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 915 | input_pass_values(dev, vals, ARRAY_SIZE(vals)); |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 916 | } |
| 917 | |
| 918 | out: |
| 919 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 920 | |
| 921 | return retval; |
| 922 | } |
| 923 | EXPORT_SYMBOL(input_set_keycode); |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 924 | |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 925 | 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] | 926 | struct input_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | { |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 928 | const struct input_device_id *id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 930 | for (id = handler->id_table; id->flags || id->driver_info; id++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | |
| 932 | if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) |
Dmitry Torokhov | ddc5d34 | 2006-04-26 00:14:19 -0400 | [diff] [blame] | 933 | if (id->bustype != dev->id.bustype) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | continue; |
| 935 | |
| 936 | if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) |
Dmitry Torokhov | ddc5d34 | 2006-04-26 00:14:19 -0400 | [diff] [blame] | 937 | if (id->vendor != dev->id.vendor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | continue; |
| 939 | |
| 940 | if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) |
Dmitry Torokhov | ddc5d34 | 2006-04-26 00:14:19 -0400 | [diff] [blame] | 941 | if (id->product != dev->id.product) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | continue; |
| 943 | |
| 944 | if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) |
Dmitry Torokhov | ddc5d34 | 2006-04-26 00:14:19 -0400 | [diff] [blame] | 945 | if (id->version != dev->id.version) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | continue; |
| 947 | |
Dmitry Torokhov | c0bb1f9 | 2012-07-31 22:08:55 -0700 | [diff] [blame] | 948 | if (!bitmap_subset(id->evbit, dev->evbit, EV_MAX)) |
| 949 | continue; |
| 950 | |
| 951 | if (!bitmap_subset(id->keybit, dev->keybit, KEY_MAX)) |
| 952 | continue; |
| 953 | |
| 954 | if (!bitmap_subset(id->relbit, dev->relbit, REL_MAX)) |
| 955 | continue; |
| 956 | |
| 957 | if (!bitmap_subset(id->absbit, dev->absbit, ABS_MAX)) |
| 958 | continue; |
| 959 | |
| 960 | if (!bitmap_subset(id->mscbit, dev->mscbit, MSC_MAX)) |
| 961 | continue; |
| 962 | |
| 963 | if (!bitmap_subset(id->ledbit, dev->ledbit, LED_MAX)) |
| 964 | continue; |
| 965 | |
| 966 | if (!bitmap_subset(id->sndbit, dev->sndbit, SND_MAX)) |
| 967 | continue; |
| 968 | |
| 969 | if (!bitmap_subset(id->ffbit, dev->ffbit, FF_MAX)) |
| 970 | continue; |
| 971 | |
| 972 | if (!bitmap_subset(id->swbit, dev->swbit, SW_MAX)) |
| 973 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 975 | if (!handler->match || handler->match(handler, dev)) |
| 976 | return id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | } |
| 978 | |
| 979 | return NULL; |
| 980 | } |
| 981 | |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 982 | static int input_attach_handler(struct input_dev *dev, struct input_handler *handler) |
| 983 | { |
| 984 | const struct input_device_id *id; |
| 985 | int error; |
| 986 | |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 987 | id = input_match_device(handler, dev); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 988 | if (!id) |
| 989 | return -ENODEV; |
| 990 | |
| 991 | error = handler->connect(handler, dev, id); |
| 992 | if (error && error != -ENODEV) |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 993 | pr_err("failed to attach handler %s to device %s, error: %d\n", |
| 994 | handler->name, kobject_name(&dev->dev.kobj), error); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 995 | |
| 996 | return error; |
| 997 | } |
| 998 | |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 999 | #ifdef CONFIG_COMPAT |
| 1000 | |
| 1001 | static int input_bits_to_string(char *buf, int buf_size, |
| 1002 | unsigned long bits, bool skip_empty) |
| 1003 | { |
| 1004 | int len = 0; |
| 1005 | |
| 1006 | if (INPUT_COMPAT_TEST) { |
| 1007 | u32 dword = bits >> 32; |
| 1008 | if (dword || !skip_empty) |
| 1009 | len += snprintf(buf, buf_size, "%x ", dword); |
| 1010 | |
| 1011 | dword = bits & 0xffffffffUL; |
| 1012 | if (dword || !skip_empty || len) |
| 1013 | len += snprintf(buf + len, max(buf_size - len, 0), |
| 1014 | "%x", dword); |
| 1015 | } else { |
| 1016 | if (bits || !skip_empty) |
| 1017 | len += snprintf(buf, buf_size, "%lx", bits); |
| 1018 | } |
| 1019 | |
| 1020 | return len; |
| 1021 | } |
| 1022 | |
| 1023 | #else /* !CONFIG_COMPAT */ |
| 1024 | |
| 1025 | static int input_bits_to_string(char *buf, int buf_size, |
| 1026 | unsigned long bits, bool skip_empty) |
| 1027 | { |
| 1028 | return bits || !skip_empty ? |
| 1029 | snprintf(buf, buf_size, "%lx", bits) : 0; |
| 1030 | } |
| 1031 | |
| 1032 | #endif |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1033 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | #ifdef CONFIG_PROC_FS |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1035 | |
| 1036 | static struct proc_dir_entry *proc_bus_input_dir; |
| 1037 | static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait); |
| 1038 | static int input_devices_state; |
| 1039 | |
| 1040 | static inline void input_wakeup_procfs_readers(void) |
| 1041 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | input_devices_state++; |
| 1043 | wake_up(&input_devices_poll_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | } |
| 1045 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1046 | 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] | 1047 | { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1048 | poll_wait(file, &input_devices_poll_wait, wait); |
Dmitry Torokhov | fa88661 | 2009-03-04 00:52:20 -0800 | [diff] [blame] | 1049 | if (file->f_version != input_devices_state) { |
| 1050 | file->f_version = input_devices_state; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1051 | return POLLIN | POLLRDNORM; |
Dmitry Torokhov | fa88661 | 2009-03-04 00:52:20 -0800 | [diff] [blame] | 1052 | } |
Dmitry Torokhov | 1e0afb2 | 2006-06-26 01:48:47 -0400 | [diff] [blame] | 1053 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1054 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | } |
| 1056 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1057 | union input_seq_state { |
| 1058 | struct { |
| 1059 | unsigned short pos; |
| 1060 | bool mutex_acquired; |
| 1061 | }; |
| 1062 | void *p; |
| 1063 | }; |
| 1064 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1065 | static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos) |
| 1066 | { |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1067 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
| 1068 | int error; |
| 1069 | |
| 1070 | /* We need to fit into seq->private pointer */ |
| 1071 | BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private)); |
| 1072 | |
| 1073 | error = mutex_lock_interruptible(&input_mutex); |
| 1074 | if (error) { |
| 1075 | state->mutex_acquired = false; |
| 1076 | return ERR_PTR(error); |
| 1077 | } |
| 1078 | |
| 1079 | state->mutex_acquired = true; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1080 | |
Pavel Emelianov | ad5d972 | 2007-07-18 00:38:32 -0400 | [diff] [blame] | 1081 | return seq_list_start(&input_dev_list, *pos); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1082 | } |
| 1083 | |
| 1084 | static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1085 | { |
Pavel Emelianov | ad5d972 | 2007-07-18 00:38:32 -0400 | [diff] [blame] | 1086 | return seq_list_next(v, &input_dev_list, pos); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1087 | } |
| 1088 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1089 | static void input_seq_stop(struct seq_file *seq, void *v) |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1090 | { |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1091 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
| 1092 | |
| 1093 | if (state->mutex_acquired) |
| 1094 | mutex_unlock(&input_mutex); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1095 | } |
| 1096 | |
| 1097 | static void input_seq_print_bitmap(struct seq_file *seq, const char *name, |
| 1098 | unsigned long *bitmap, int max) |
| 1099 | { |
| 1100 | int i; |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1101 | bool skip_empty = true; |
| 1102 | char buf[18]; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1103 | |
| 1104 | seq_printf(seq, "B: %s=", name); |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1105 | |
| 1106 | for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) { |
| 1107 | if (input_bits_to_string(buf, sizeof(buf), |
| 1108 | bitmap[i], skip_empty)) { |
| 1109 | skip_empty = false; |
| 1110 | seq_printf(seq, "%s%s", buf, i > 0 ? " " : ""); |
| 1111 | } |
| 1112 | } |
| 1113 | |
| 1114 | /* |
| 1115 | * If no output was produced print a single 0. |
| 1116 | */ |
| 1117 | if (skip_empty) |
| 1118 | seq_puts(seq, "0"); |
| 1119 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1120 | seq_putc(seq, '\n'); |
| 1121 | } |
| 1122 | |
| 1123 | static int input_devices_seq_show(struct seq_file *seq, void *v) |
| 1124 | { |
| 1125 | struct input_dev *dev = container_of(v, struct input_dev, node); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1126 | const char *path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | struct input_handle *handle; |
| 1128 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1129 | seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n", |
| 1130 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1132 | seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); |
| 1133 | seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : ""); |
| 1134 | seq_printf(seq, "S: Sysfs=%s\n", path ? path : ""); |
Dmitry Torokhov | 15e03ae | 2007-03-07 23:20:17 -0500 | [diff] [blame] | 1135 | seq_printf(seq, "U: Uniq=%s\n", dev->uniq ? dev->uniq : ""); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1136 | seq_printf(seq, "H: Handlers="); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1138 | list_for_each_entry(handle, &dev->h_list, d_node) |
| 1139 | seq_printf(seq, "%s ", handle->name); |
| 1140 | seq_putc(seq, '\n'); |
Dmitry Torokhov | 051b2fe | 2005-09-15 02:01:54 -0500 | [diff] [blame] | 1141 | |
Henrik Rydberg | 85b7720 | 2010-12-18 20:51:13 +0100 | [diff] [blame] | 1142 | input_seq_print_bitmap(seq, "PROP", dev->propbit, INPUT_PROP_MAX); |
| 1143 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1144 | input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX); |
| 1145 | if (test_bit(EV_KEY, dev->evbit)) |
| 1146 | input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX); |
| 1147 | if (test_bit(EV_REL, dev->evbit)) |
| 1148 | input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX); |
| 1149 | if (test_bit(EV_ABS, dev->evbit)) |
| 1150 | input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX); |
| 1151 | if (test_bit(EV_MSC, dev->evbit)) |
| 1152 | input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX); |
| 1153 | if (test_bit(EV_LED, dev->evbit)) |
| 1154 | input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX); |
| 1155 | if (test_bit(EV_SND, dev->evbit)) |
| 1156 | input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX); |
| 1157 | if (test_bit(EV_FF, dev->evbit)) |
| 1158 | input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX); |
| 1159 | if (test_bit(EV_SW, dev->evbit)) |
| 1160 | input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1162 | seq_putc(seq, '\n'); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1164 | kfree(path); |
| 1165 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | } |
| 1167 | |
Jan Engelhardt | cec69c3 | 2008-01-31 00:43:32 -0500 | [diff] [blame] | 1168 | static const struct seq_operations input_devices_seq_ops = { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1169 | .start = input_devices_seq_start, |
| 1170 | .next = input_devices_seq_next, |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1171 | .stop = input_seq_stop, |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1172 | .show = input_devices_seq_show, |
| 1173 | }; |
| 1174 | |
| 1175 | static int input_proc_devices_open(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1177 | return seq_open(file, &input_devices_seq_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | } |
| 1179 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 1180 | static const struct file_operations input_devices_fileops = { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1181 | .owner = THIS_MODULE, |
| 1182 | .open = input_proc_devices_open, |
| 1183 | .poll = input_proc_devices_poll, |
| 1184 | .read = seq_read, |
| 1185 | .llseek = seq_lseek, |
| 1186 | .release = seq_release, |
| 1187 | }; |
| 1188 | |
| 1189 | static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos) |
| 1190 | { |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1191 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
| 1192 | int error; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1193 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1194 | /* We need to fit into seq->private pointer */ |
| 1195 | BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private)); |
| 1196 | |
| 1197 | error = mutex_lock_interruptible(&input_mutex); |
| 1198 | if (error) { |
| 1199 | state->mutex_acquired = false; |
| 1200 | return ERR_PTR(error); |
| 1201 | } |
| 1202 | |
| 1203 | state->mutex_acquired = true; |
| 1204 | state->pos = *pos; |
| 1205 | |
Pavel Emelianov | ad5d972 | 2007-07-18 00:38:32 -0400 | [diff] [blame] | 1206 | return seq_list_start(&input_handler_list, *pos); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1207 | } |
| 1208 | |
| 1209 | static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1210 | { |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1211 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1212 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1213 | state->pos = *pos + 1; |
| 1214 | return seq_list_next(v, &input_handler_list, pos); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1215 | } |
| 1216 | |
| 1217 | static int input_handlers_seq_show(struct seq_file *seq, void *v) |
| 1218 | { |
| 1219 | struct input_handler *handler = container_of(v, struct input_handler, node); |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1220 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1221 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1222 | seq_printf(seq, "N: Number=%u Name=%s", state->pos, handler->name); |
Dmitry Torokhov | ef7995f | 2010-01-29 23:59:12 -0800 | [diff] [blame] | 1223 | if (handler->filter) |
| 1224 | seq_puts(seq, " (filter)"); |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 1225 | if (handler->legacy_minors) |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1226 | seq_printf(seq, " Minor=%d", handler->minor); |
| 1227 | seq_putc(seq, '\n'); |
| 1228 | |
| 1229 | return 0; |
| 1230 | } |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1231 | |
Jan Engelhardt | cec69c3 | 2008-01-31 00:43:32 -0500 | [diff] [blame] | 1232 | static const struct seq_operations input_handlers_seq_ops = { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1233 | .start = input_handlers_seq_start, |
| 1234 | .next = input_handlers_seq_next, |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1235 | .stop = input_seq_stop, |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1236 | .show = input_handlers_seq_show, |
| 1237 | }; |
| 1238 | |
| 1239 | static int input_proc_handlers_open(struct inode *inode, struct file *file) |
| 1240 | { |
| 1241 | return seq_open(file, &input_handlers_seq_ops); |
| 1242 | } |
| 1243 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 1244 | static const struct file_operations input_handlers_fileops = { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1245 | .owner = THIS_MODULE, |
| 1246 | .open = input_proc_handlers_open, |
| 1247 | .read = seq_read, |
| 1248 | .llseek = seq_lseek, |
| 1249 | .release = seq_release, |
| 1250 | }; |
Luke Kosewski | e334016fc | 2005-06-01 02:39:28 -0500 | [diff] [blame] | 1251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | static int __init input_proc_init(void) |
| 1253 | { |
| 1254 | struct proc_dir_entry *entry; |
| 1255 | |
Alexey Dobriyan | 9c37066 | 2008-04-29 01:01:41 -0700 | [diff] [blame] | 1256 | proc_bus_input_dir = proc_mkdir("bus/input", NULL); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1257 | if (!proc_bus_input_dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | return -ENOMEM; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1259 | |
Denis V. Lunev | c7705f3 | 2008-04-29 01:02:35 -0700 | [diff] [blame] | 1260 | entry = proc_create("devices", 0, proc_bus_input_dir, |
| 1261 | &input_devices_fileops); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1262 | if (!entry) |
| 1263 | goto fail1; |
| 1264 | |
Denis V. Lunev | c7705f3 | 2008-04-29 01:02:35 -0700 | [diff] [blame] | 1265 | entry = proc_create("handlers", 0, proc_bus_input_dir, |
| 1266 | &input_handlers_fileops); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1267 | if (!entry) |
| 1268 | goto fail2; |
| 1269 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | return 0; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1271 | |
| 1272 | fail2: remove_proc_entry("devices", proc_bus_input_dir); |
Alexey Dobriyan | 9c37066 | 2008-04-29 01:01:41 -0700 | [diff] [blame] | 1273 | fail1: remove_proc_entry("bus/input", NULL); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1274 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1276 | |
Andrew Morton | beffbdc | 2005-07-01 23:54:30 -0500 | [diff] [blame] | 1277 | static void input_proc_exit(void) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1278 | { |
| 1279 | remove_proc_entry("devices", proc_bus_input_dir); |
| 1280 | remove_proc_entry("handlers", proc_bus_input_dir); |
Alexey Dobriyan | 9c37066 | 2008-04-29 01:01:41 -0700 | [diff] [blame] | 1281 | remove_proc_entry("bus/input", NULL); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1282 | } |
| 1283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | #else /* !CONFIG_PROC_FS */ |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1285 | static inline void input_wakeup_procfs_readers(void) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | static inline int input_proc_init(void) { return 0; } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1287 | static inline void input_proc_exit(void) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | #endif |
| 1289 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1290 | #define INPUT_DEV_STRING_ATTR_SHOW(name) \ |
| 1291 | static ssize_t input_dev_show_##name(struct device *dev, \ |
| 1292 | struct device_attribute *attr, \ |
| 1293 | char *buf) \ |
| 1294 | { \ |
| 1295 | struct input_dev *input_dev = to_input_dev(dev); \ |
| 1296 | \ |
| 1297 | return scnprintf(buf, PAGE_SIZE, "%s\n", \ |
| 1298 | input_dev->name ? input_dev->name : ""); \ |
| 1299 | } \ |
| 1300 | static DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL) |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1301 | |
| 1302 | INPUT_DEV_STRING_ATTR_SHOW(name); |
| 1303 | INPUT_DEV_STRING_ATTR_SHOW(phys); |
| 1304 | INPUT_DEV_STRING_ATTR_SHOW(uniq); |
| 1305 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1306 | static int input_print_modalias_bits(char *buf, int size, |
| 1307 | char name, unsigned long *bm, |
| 1308 | unsigned int min_bit, unsigned int max_bit) |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1309 | { |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1310 | int len = 0, i; |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1311 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1312 | len += snprintf(buf, max(size, 0), "%c", name); |
| 1313 | for (i = min_bit; i < max_bit; i++) |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 1314 | if (bm[BIT_WORD(i)] & BIT_MASK(i)) |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1315 | len += snprintf(buf + len, max(size - len, 0), "%X,", i); |
Kay Sievers | bd37e5a | 2006-01-05 13:19:55 +0100 | [diff] [blame] | 1316 | return len; |
| 1317 | } |
| 1318 | |
Dmitry Torokhov | 2db6687 | 2006-04-02 00:09:26 -0500 | [diff] [blame] | 1319 | static int input_print_modalias(char *buf, int size, struct input_dev *id, |
| 1320 | int add_cr) |
Kay Sievers | bd37e5a | 2006-01-05 13:19:55 +0100 | [diff] [blame] | 1321 | { |
| 1322 | int len; |
| 1323 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1324 | len = snprintf(buf, max(size, 0), |
| 1325 | "input:b%04Xv%04Xp%04Xe%04X-", |
| 1326 | id->id.bustype, id->id.vendor, |
| 1327 | id->id.product, id->id.version); |
Kay Sievers | bd37e5a | 2006-01-05 13:19:55 +0100 | [diff] [blame] | 1328 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1329 | len += input_print_modalias_bits(buf + len, size - len, |
| 1330 | 'e', id->evbit, 0, EV_MAX); |
| 1331 | len += input_print_modalias_bits(buf + len, size - len, |
| 1332 | 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX); |
| 1333 | len += input_print_modalias_bits(buf + len, size - len, |
| 1334 | 'r', id->relbit, 0, REL_MAX); |
| 1335 | len += input_print_modalias_bits(buf + len, size - len, |
| 1336 | 'a', id->absbit, 0, ABS_MAX); |
| 1337 | len += input_print_modalias_bits(buf + len, size - len, |
| 1338 | 'm', id->mscbit, 0, MSC_MAX); |
| 1339 | len += input_print_modalias_bits(buf + len, size - len, |
| 1340 | 'l', id->ledbit, 0, LED_MAX); |
| 1341 | len += input_print_modalias_bits(buf + len, size - len, |
| 1342 | 's', id->sndbit, 0, SND_MAX); |
| 1343 | len += input_print_modalias_bits(buf + len, size - len, |
| 1344 | 'f', id->ffbit, 0, FF_MAX); |
| 1345 | len += input_print_modalias_bits(buf + len, size - len, |
| 1346 | 'w', id->swbit, 0, SW_MAX); |
Dmitry Torokhov | 2db6687 | 2006-04-02 00:09:26 -0500 | [diff] [blame] | 1347 | |
| 1348 | if (add_cr) |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1349 | len += snprintf(buf + len, max(size - len, 0), "\n"); |
Dmitry Torokhov | 2db6687 | 2006-04-02 00:09:26 -0500 | [diff] [blame] | 1350 | |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1351 | return len; |
| 1352 | } |
| 1353 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1354 | static ssize_t input_dev_show_modalias(struct device *dev, |
| 1355 | struct device_attribute *attr, |
| 1356 | char *buf) |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1357 | { |
| 1358 | struct input_dev *id = to_input_dev(dev); |
Kay Sievers | bd37e5a | 2006-01-05 13:19:55 +0100 | [diff] [blame] | 1359 | ssize_t len; |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1360 | |
Dmitry Torokhov | 2db6687 | 2006-04-02 00:09:26 -0500 | [diff] [blame] | 1361 | len = input_print_modalias(buf, PAGE_SIZE, id, 1); |
| 1362 | |
Richard Purdie | 8a3cf45 | 2006-06-26 01:48:21 -0400 | [diff] [blame] | 1363 | return min_t(int, len, PAGE_SIZE); |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1364 | } |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1365 | static DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL); |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1366 | |
Henrik Rydberg | 85b7720 | 2010-12-18 20:51:13 +0100 | [diff] [blame] | 1367 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, |
| 1368 | int max, int add_cr); |
| 1369 | |
| 1370 | static ssize_t input_dev_show_properties(struct device *dev, |
| 1371 | struct device_attribute *attr, |
| 1372 | char *buf) |
| 1373 | { |
| 1374 | struct input_dev *input_dev = to_input_dev(dev); |
| 1375 | int len = input_print_bitmap(buf, PAGE_SIZE, input_dev->propbit, |
| 1376 | INPUT_PROP_MAX, true); |
| 1377 | return min_t(int, len, PAGE_SIZE); |
| 1378 | } |
| 1379 | static DEVICE_ATTR(properties, S_IRUGO, input_dev_show_properties, NULL); |
| 1380 | |
Greg Kroah-Hartman | 629b77a | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1381 | static struct attribute *input_dev_attrs[] = { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1382 | &dev_attr_name.attr, |
| 1383 | &dev_attr_phys.attr, |
| 1384 | &dev_attr_uniq.attr, |
| 1385 | &dev_attr_modalias.attr, |
Henrik Rydberg | 85b7720 | 2010-12-18 20:51:13 +0100 | [diff] [blame] | 1386 | &dev_attr_properties.attr, |
Greg Kroah-Hartman | 629b77a | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1387 | NULL |
| 1388 | }; |
| 1389 | |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 1390 | static struct attribute_group input_dev_attr_group = { |
Greg Kroah-Hartman | 629b77a | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1391 | .attrs = input_dev_attrs, |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1392 | }; |
| 1393 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1394 | #define INPUT_DEV_ID_ATTR(name) \ |
| 1395 | static ssize_t input_dev_show_id_##name(struct device *dev, \ |
| 1396 | struct device_attribute *attr, \ |
| 1397 | char *buf) \ |
| 1398 | { \ |
| 1399 | struct input_dev *input_dev = to_input_dev(dev); \ |
| 1400 | return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \ |
| 1401 | } \ |
| 1402 | static DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL) |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1403 | |
| 1404 | INPUT_DEV_ID_ATTR(bustype); |
| 1405 | INPUT_DEV_ID_ATTR(vendor); |
| 1406 | INPUT_DEV_ID_ATTR(product); |
| 1407 | INPUT_DEV_ID_ATTR(version); |
| 1408 | |
| 1409 | static struct attribute *input_dev_id_attrs[] = { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1410 | &dev_attr_bustype.attr, |
| 1411 | &dev_attr_vendor.attr, |
| 1412 | &dev_attr_product.attr, |
| 1413 | &dev_attr_version.attr, |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1414 | NULL |
| 1415 | }; |
| 1416 | |
| 1417 | static struct attribute_group input_dev_id_attr_group = { |
| 1418 | .name = "id", |
| 1419 | .attrs = input_dev_id_attrs, |
| 1420 | }; |
| 1421 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1422 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, |
| 1423 | int max, int add_cr) |
| 1424 | { |
| 1425 | int i; |
| 1426 | int len = 0; |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1427 | bool skip_empty = true; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1428 | |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1429 | for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) { |
| 1430 | len += input_bits_to_string(buf + len, max(buf_size - len, 0), |
| 1431 | bitmap[i], skip_empty); |
| 1432 | if (len) { |
| 1433 | skip_empty = false; |
| 1434 | if (i > 0) |
| 1435 | len += snprintf(buf + len, max(buf_size - len, 0), " "); |
| 1436 | } |
| 1437 | } |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1438 | |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1439 | /* |
| 1440 | * If no output was produced print a single 0. |
| 1441 | */ |
| 1442 | if (len == 0) |
| 1443 | len = snprintf(buf, buf_size, "%d", 0); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1444 | |
| 1445 | if (add_cr) |
| 1446 | len += snprintf(buf + len, max(buf_size - len, 0), "\n"); |
| 1447 | |
| 1448 | return len; |
| 1449 | } |
| 1450 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1451 | #define INPUT_DEV_CAP_ATTR(ev, bm) \ |
| 1452 | static ssize_t input_dev_show_cap_##bm(struct device *dev, \ |
| 1453 | struct device_attribute *attr, \ |
| 1454 | char *buf) \ |
| 1455 | { \ |
| 1456 | struct input_dev *input_dev = to_input_dev(dev); \ |
| 1457 | int len = input_print_bitmap(buf, PAGE_SIZE, \ |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1458 | input_dev->bm##bit, ev##_MAX, \ |
| 1459 | true); \ |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1460 | return min_t(int, len, PAGE_SIZE); \ |
| 1461 | } \ |
| 1462 | static DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL) |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1463 | |
| 1464 | INPUT_DEV_CAP_ATTR(EV, ev); |
| 1465 | INPUT_DEV_CAP_ATTR(KEY, key); |
| 1466 | INPUT_DEV_CAP_ATTR(REL, rel); |
| 1467 | INPUT_DEV_CAP_ATTR(ABS, abs); |
| 1468 | INPUT_DEV_CAP_ATTR(MSC, msc); |
| 1469 | INPUT_DEV_CAP_ATTR(LED, led); |
| 1470 | INPUT_DEV_CAP_ATTR(SND, snd); |
| 1471 | INPUT_DEV_CAP_ATTR(FF, ff); |
| 1472 | INPUT_DEV_CAP_ATTR(SW, sw); |
| 1473 | |
| 1474 | static struct attribute *input_dev_caps_attrs[] = { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1475 | &dev_attr_ev.attr, |
| 1476 | &dev_attr_key.attr, |
| 1477 | &dev_attr_rel.attr, |
| 1478 | &dev_attr_abs.attr, |
| 1479 | &dev_attr_msc.attr, |
| 1480 | &dev_attr_led.attr, |
| 1481 | &dev_attr_snd.attr, |
| 1482 | &dev_attr_ff.attr, |
| 1483 | &dev_attr_sw.attr, |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1484 | NULL |
| 1485 | }; |
| 1486 | |
| 1487 | static struct attribute_group input_dev_caps_attr_group = { |
| 1488 | .name = "capabilities", |
| 1489 | .attrs = input_dev_caps_attrs, |
| 1490 | }; |
| 1491 | |
David Brownell | a4dbd67 | 2009-06-24 10:06:31 -0700 | [diff] [blame] | 1492 | static const struct attribute_group *input_dev_attr_groups[] = { |
Dmitry Torokhov | cb9def4 | 2007-03-07 23:20:26 -0500 | [diff] [blame] | 1493 | &input_dev_attr_group, |
| 1494 | &input_dev_id_attr_group, |
| 1495 | &input_dev_caps_attr_group, |
| 1496 | NULL |
| 1497 | }; |
| 1498 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1499 | static void input_dev_release(struct device *device) |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1500 | { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1501 | struct input_dev *dev = to_input_dev(device); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1502 | |
Anssi Hannula | 509ca1a | 2006-07-19 01:40:22 -0400 | [diff] [blame] | 1503 | input_ff_destroy(dev); |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 1504 | input_mt_destroy_slots(dev); |
Daniel Mack | d31b286 | 2010-08-02 20:18:21 -0700 | [diff] [blame] | 1505 | kfree(dev->absinfo); |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 1506 | kfree(dev->vals); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1507 | kfree(dev); |
Anssi Hannula | 509ca1a | 2006-07-19 01:40:22 -0400 | [diff] [blame] | 1508 | |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1509 | module_put(THIS_MODULE); |
| 1510 | } |
| 1511 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1512 | /* |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 1513 | * Input uevent interface - loading event handlers based on |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1514 | * device bitfields. |
| 1515 | */ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1516 | static int input_add_uevent_bm_var(struct kobj_uevent_env *env, |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1517 | const char *name, unsigned long *bitmap, int max) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1518 | { |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1519 | int len; |
| 1520 | |
Henrik Rydberg | fcd3027 | 2010-12-18 20:28:26 +0100 | [diff] [blame] | 1521 | if (add_uevent_var(env, "%s", name)) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1522 | return -ENOMEM; |
| 1523 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1524 | len = input_print_bitmap(&env->buf[env->buflen - 1], |
| 1525 | sizeof(env->buf) - env->buflen, |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1526 | bitmap, max, false); |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1527 | if (len >= (sizeof(env->buf) - env->buflen)) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1528 | return -ENOMEM; |
| 1529 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1530 | env->buflen += len; |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1531 | return 0; |
| 1532 | } |
| 1533 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1534 | static int input_add_uevent_modalias_var(struct kobj_uevent_env *env, |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1535 | struct input_dev *dev) |
| 1536 | { |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1537 | int len; |
| 1538 | |
| 1539 | if (add_uevent_var(env, "MODALIAS=")) |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1540 | return -ENOMEM; |
| 1541 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1542 | len = input_print_modalias(&env->buf[env->buflen - 1], |
| 1543 | sizeof(env->buf) - env->buflen, |
| 1544 | dev, 0); |
| 1545 | if (len >= (sizeof(env->buf) - env->buflen)) |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1546 | return -ENOMEM; |
| 1547 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1548 | env->buflen += len; |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1549 | return 0; |
| 1550 | } |
| 1551 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1552 | #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \ |
| 1553 | do { \ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1554 | int err = add_uevent_var(env, fmt, val); \ |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1555 | if (err) \ |
| 1556 | return err; \ |
| 1557 | } while (0) |
| 1558 | |
| 1559 | #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \ |
| 1560 | do { \ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1561 | int err = input_add_uevent_bm_var(env, name, bm, max); \ |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1562 | if (err) \ |
| 1563 | return err; \ |
| 1564 | } while (0) |
| 1565 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1566 | #define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \ |
| 1567 | do { \ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1568 | int err = input_add_uevent_modalias_var(env, dev); \ |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1569 | if (err) \ |
| 1570 | return err; \ |
| 1571 | } while (0) |
| 1572 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1573 | 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] | 1574 | { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1575 | struct input_dev *dev = to_input_dev(device); |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1576 | |
| 1577 | INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x", |
| 1578 | dev->id.bustype, dev->id.vendor, |
| 1579 | dev->id.product, dev->id.version); |
| 1580 | if (dev->name) |
| 1581 | INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); |
| 1582 | if (dev->phys) |
| 1583 | INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); |
Dmitry Torokhov | 08de1f0 | 2005-11-08 21:34:29 -0800 | [diff] [blame] | 1584 | if (dev->uniq) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1585 | INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); |
| 1586 | |
Henrik Rydberg | 85b7720 | 2010-12-18 20:51:13 +0100 | [diff] [blame] | 1587 | INPUT_ADD_HOTPLUG_BM_VAR("PROP=", dev->propbit, INPUT_PROP_MAX); |
| 1588 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1589 | INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); |
| 1590 | if (test_bit(EV_KEY, dev->evbit)) |
| 1591 | INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); |
| 1592 | if (test_bit(EV_REL, dev->evbit)) |
| 1593 | INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); |
| 1594 | if (test_bit(EV_ABS, dev->evbit)) |
| 1595 | INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); |
| 1596 | if (test_bit(EV_MSC, dev->evbit)) |
| 1597 | INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); |
| 1598 | if (test_bit(EV_LED, dev->evbit)) |
| 1599 | INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); |
| 1600 | if (test_bit(EV_SND, dev->evbit)) |
| 1601 | INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); |
| 1602 | if (test_bit(EV_FF, dev->evbit)) |
| 1603 | INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); |
| 1604 | if (test_bit(EV_SW, dev->evbit)) |
| 1605 | INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); |
| 1606 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1607 | INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev); |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1608 | |
| 1609 | return 0; |
| 1610 | } |
| 1611 | |
Dmitry Torokhov | 3cc9635 | 2009-11-12 23:19:05 -0800 | [diff] [blame] | 1612 | #define INPUT_DO_TOGGLE(dev, type, bits, on) \ |
| 1613 | do { \ |
| 1614 | int i; \ |
| 1615 | bool active; \ |
| 1616 | \ |
| 1617 | if (!test_bit(EV_##type, dev->evbit)) \ |
| 1618 | break; \ |
| 1619 | \ |
| 1620 | for (i = 0; i < type##_MAX; i++) { \ |
| 1621 | if (!test_bit(i, dev->bits##bit)) \ |
| 1622 | continue; \ |
| 1623 | \ |
| 1624 | active = test_bit(i, dev->bits); \ |
| 1625 | if (!active && !on) \ |
| 1626 | continue; \ |
| 1627 | \ |
| 1628 | dev->event(dev, EV_##type, i, on ? active : 0); \ |
| 1629 | } \ |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1630 | } while (0) |
| 1631 | |
Dmitry Torokhov | b50b521 | 2010-11-03 11:02:31 -0700 | [diff] [blame] | 1632 | static void input_dev_toggle(struct input_dev *dev, bool activate) |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1633 | { |
| 1634 | if (!dev->event) |
| 1635 | return; |
| 1636 | |
| 1637 | INPUT_DO_TOGGLE(dev, LED, led, activate); |
| 1638 | INPUT_DO_TOGGLE(dev, SND, snd, activate); |
| 1639 | |
| 1640 | if (activate && test_bit(EV_REP, dev->evbit)) { |
| 1641 | dev->event(dev, EV_REP, REP_PERIOD, dev->rep[REP_PERIOD]); |
| 1642 | dev->event(dev, EV_REP, REP_DELAY, dev->rep[REP_DELAY]); |
| 1643 | } |
| 1644 | } |
| 1645 | |
Dmitry Torokhov | b50b521 | 2010-11-03 11:02:31 -0700 | [diff] [blame] | 1646 | /** |
| 1647 | * input_reset_device() - reset/restore the state of input device |
| 1648 | * @dev: input device whose state needs to be reset |
| 1649 | * |
| 1650 | * This function tries to reset the state of an opened input device and |
| 1651 | * bring internal state and state if the hardware in sync with each other. |
| 1652 | * We mark all keys as released, restore LED state, repeat rate, etc. |
| 1653 | */ |
| 1654 | void input_reset_device(struct input_dev *dev) |
| 1655 | { |
| 1656 | mutex_lock(&dev->mutex); |
| 1657 | |
| 1658 | if (dev->users) { |
| 1659 | input_dev_toggle(dev, true); |
| 1660 | |
| 1661 | /* |
| 1662 | * Keys that have been pressed at suspend time are unlikely |
| 1663 | * to be still pressed when we resume. |
| 1664 | */ |
| 1665 | spin_lock_irq(&dev->event_lock); |
| 1666 | input_dev_release_keys(dev); |
| 1667 | spin_unlock_irq(&dev->event_lock); |
| 1668 | } |
| 1669 | |
| 1670 | mutex_unlock(&dev->mutex); |
| 1671 | } |
| 1672 | EXPORT_SYMBOL(input_reset_device); |
| 1673 | |
| 1674 | #ifdef CONFIG_PM |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1675 | static int input_dev_suspend(struct device *dev) |
| 1676 | { |
| 1677 | struct input_dev *input_dev = to_input_dev(dev); |
| 1678 | |
| 1679 | mutex_lock(&input_dev->mutex); |
Dmitry Torokhov | b50b521 | 2010-11-03 11:02:31 -0700 | [diff] [blame] | 1680 | |
| 1681 | if (input_dev->users) |
| 1682 | input_dev_toggle(input_dev, false); |
| 1683 | |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1684 | mutex_unlock(&input_dev->mutex); |
| 1685 | |
| 1686 | return 0; |
| 1687 | } |
| 1688 | |
| 1689 | static int input_dev_resume(struct device *dev) |
| 1690 | { |
| 1691 | struct input_dev *input_dev = to_input_dev(dev); |
| 1692 | |
Dmitry Torokhov | b50b521 | 2010-11-03 11:02:31 -0700 | [diff] [blame] | 1693 | input_reset_device(input_dev); |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1694 | |
| 1695 | return 0; |
| 1696 | } |
| 1697 | |
| 1698 | static const struct dev_pm_ops input_dev_pm_ops = { |
| 1699 | .suspend = input_dev_suspend, |
| 1700 | .resume = input_dev_resume, |
| 1701 | .poweroff = input_dev_suspend, |
| 1702 | .restore = input_dev_resume, |
| 1703 | }; |
| 1704 | #endif /* CONFIG_PM */ |
| 1705 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1706 | static struct device_type input_dev_type = { |
| 1707 | .groups = input_dev_attr_groups, |
| 1708 | .release = input_dev_release, |
| 1709 | .uevent = input_dev_uevent, |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1710 | #ifdef CONFIG_PM |
| 1711 | .pm = &input_dev_pm_ops, |
| 1712 | #endif |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1713 | }; |
| 1714 | |
Al Viro | 2c9ede5 | 2011-07-23 20:24:48 -0400 | [diff] [blame] | 1715 | static char *input_devnode(struct device *dev, umode_t *mode) |
Kay Sievers | aa5ed63 | 2009-04-30 15:23:42 +0200 | [diff] [blame] | 1716 | { |
| 1717 | return kasprintf(GFP_KERNEL, "input/%s", dev_name(dev)); |
| 1718 | } |
| 1719 | |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1720 | struct class input_class = { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1721 | .name = "input", |
Kay Sievers | e454cea | 2009-09-18 23:01:12 +0200 | [diff] [blame] | 1722 | .devnode = input_devnode, |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1723 | }; |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1724 | EXPORT_SYMBOL_GPL(input_class); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1725 | |
Dmitry Torokhov | 1447190 | 2006-11-02 23:26:55 -0500 | [diff] [blame] | 1726 | /** |
| 1727 | * input_allocate_device - allocate memory for new input device |
| 1728 | * |
Dmitry Torokhov | 2be975c | 2012-11-03 12:16:12 -0700 | [diff] [blame] | 1729 | * Returns prepared struct input_dev or %NULL. |
Dmitry Torokhov | 1447190 | 2006-11-02 23:26:55 -0500 | [diff] [blame] | 1730 | * |
| 1731 | * NOTE: Use input_free_device() to free devices that have not been |
| 1732 | * registered; input_unregister_device() should be used for already |
| 1733 | * registered devices. |
| 1734 | */ |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1735 | struct input_dev *input_allocate_device(void) |
| 1736 | { |
| 1737 | struct input_dev *dev; |
| 1738 | |
| 1739 | dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL); |
| 1740 | if (dev) { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1741 | dev->dev.type = &input_dev_type; |
| 1742 | dev->dev.class = &input_class; |
| 1743 | device_initialize(&dev->dev); |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1744 | mutex_init(&dev->mutex); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1745 | spin_lock_init(&dev->event_lock); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1746 | INIT_LIST_HEAD(&dev->h_list); |
| 1747 | INIT_LIST_HEAD(&dev->node); |
Dmitry Torokhov | 655816e | 2006-09-14 01:32:14 -0400 | [diff] [blame] | 1748 | |
| 1749 | __module_get(THIS_MODULE); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1750 | } |
| 1751 | |
| 1752 | return dev; |
| 1753 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1754 | EXPORT_SYMBOL(input_allocate_device); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1755 | |
Dmitry Torokhov | 2be975c | 2012-11-03 12:16:12 -0700 | [diff] [blame] | 1756 | struct input_devres { |
| 1757 | struct input_dev *input; |
| 1758 | }; |
| 1759 | |
| 1760 | static int devm_input_device_match(struct device *dev, void *res, void *data) |
| 1761 | { |
| 1762 | struct input_devres *devres = res; |
| 1763 | |
| 1764 | return devres->input == data; |
| 1765 | } |
| 1766 | |
| 1767 | static void devm_input_device_release(struct device *dev, void *res) |
| 1768 | { |
| 1769 | struct input_devres *devres = res; |
| 1770 | struct input_dev *input = devres->input; |
| 1771 | |
| 1772 | dev_dbg(dev, "%s: dropping reference to %s\n", |
| 1773 | __func__, dev_name(&input->dev)); |
| 1774 | input_put_device(input); |
| 1775 | } |
| 1776 | |
| 1777 | /** |
| 1778 | * devm_input_allocate_device - allocate managed input device |
| 1779 | * @dev: device owning the input device being created |
| 1780 | * |
| 1781 | * Returns prepared struct input_dev or %NULL. |
| 1782 | * |
| 1783 | * Managed input devices do not need to be explicitly unregistered or |
| 1784 | * freed as it will be done automatically when owner device unbinds from |
| 1785 | * its driver (or binding fails). Once managed input device is allocated, |
| 1786 | * it is ready to be set up and registered in the same fashion as regular |
| 1787 | * input device. There are no special devm_input_device_[un]register() |
| 1788 | * variants, regular ones work with both managed and unmanaged devices. |
| 1789 | * |
| 1790 | * NOTE: the owner device is set up as parent of input device and users |
| 1791 | * should not override it. |
| 1792 | */ |
| 1793 | |
| 1794 | struct input_dev *devm_input_allocate_device(struct device *dev) |
| 1795 | { |
| 1796 | struct input_dev *input; |
| 1797 | struct input_devres *devres; |
| 1798 | |
| 1799 | devres = devres_alloc(devm_input_device_release, |
| 1800 | sizeof(struct input_devres), GFP_KERNEL); |
| 1801 | if (!devres) |
| 1802 | return NULL; |
| 1803 | |
| 1804 | input = input_allocate_device(); |
| 1805 | if (!input) { |
| 1806 | devres_free(devres); |
| 1807 | return NULL; |
| 1808 | } |
| 1809 | |
| 1810 | input->dev.parent = dev; |
| 1811 | input->devres_managed = true; |
| 1812 | |
| 1813 | devres->input = input; |
| 1814 | devres_add(dev, devres); |
| 1815 | |
| 1816 | return input; |
| 1817 | } |
| 1818 | EXPORT_SYMBOL(devm_input_allocate_device); |
| 1819 | |
Dmitry Torokhov | 1447190 | 2006-11-02 23:26:55 -0500 | [diff] [blame] | 1820 | /** |
| 1821 | * input_free_device - free memory occupied by input_dev structure |
| 1822 | * @dev: input device to free |
| 1823 | * |
| 1824 | * This function should only be used if input_register_device() |
| 1825 | * was not called yet or if it failed. Once device was registered |
| 1826 | * use input_unregister_device() and memory will be freed once last |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1827 | * reference to the device is dropped. |
Dmitry Torokhov | 1447190 | 2006-11-02 23:26:55 -0500 | [diff] [blame] | 1828 | * |
| 1829 | * Device should be allocated by input_allocate_device(). |
| 1830 | * |
| 1831 | * NOTE: If there are references to the input device then memory |
| 1832 | * will not be freed until last reference is dropped. |
| 1833 | */ |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1834 | void input_free_device(struct input_dev *dev) |
| 1835 | { |
Dmitry Torokhov | 2be975c | 2012-11-03 12:16:12 -0700 | [diff] [blame] | 1836 | if (dev) { |
| 1837 | if (dev->devres_managed) |
| 1838 | WARN_ON(devres_destroy(dev->dev.parent, |
| 1839 | devm_input_device_release, |
| 1840 | devm_input_device_match, |
| 1841 | dev)); |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1842 | input_put_device(dev); |
Dmitry Torokhov | 2be975c | 2012-11-03 12:16:12 -0700 | [diff] [blame] | 1843 | } |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1844 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1845 | EXPORT_SYMBOL(input_free_device); |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1846 | |
Dmitry Torokhov | 534565f | 2007-04-25 00:53:18 -0400 | [diff] [blame] | 1847 | /** |
| 1848 | * input_set_capability - mark device as capable of a certain event |
| 1849 | * @dev: device that is capable of emitting or accepting event |
| 1850 | * @type: type of the event (EV_KEY, EV_REL, etc...) |
| 1851 | * @code: event code |
| 1852 | * |
| 1853 | * In addition to setting up corresponding bit in appropriate capability |
| 1854 | * bitmap the function also adjusts dev->evbit. |
| 1855 | */ |
| 1856 | void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code) |
| 1857 | { |
| 1858 | switch (type) { |
| 1859 | case EV_KEY: |
| 1860 | __set_bit(code, dev->keybit); |
| 1861 | break; |
| 1862 | |
| 1863 | case EV_REL: |
| 1864 | __set_bit(code, dev->relbit); |
| 1865 | break; |
| 1866 | |
| 1867 | case EV_ABS: |
| 1868 | __set_bit(code, dev->absbit); |
| 1869 | break; |
| 1870 | |
| 1871 | case EV_MSC: |
| 1872 | __set_bit(code, dev->mscbit); |
| 1873 | break; |
| 1874 | |
| 1875 | case EV_SW: |
| 1876 | __set_bit(code, dev->swbit); |
| 1877 | break; |
| 1878 | |
| 1879 | case EV_LED: |
| 1880 | __set_bit(code, dev->ledbit); |
| 1881 | break; |
| 1882 | |
| 1883 | case EV_SND: |
| 1884 | __set_bit(code, dev->sndbit); |
| 1885 | break; |
| 1886 | |
| 1887 | case EV_FF: |
| 1888 | __set_bit(code, dev->ffbit); |
| 1889 | break; |
| 1890 | |
Dmitry Baryshkov | 22d1c39 | 2007-12-14 01:21:03 -0500 | [diff] [blame] | 1891 | case EV_PWR: |
| 1892 | /* do nothing */ |
| 1893 | break; |
| 1894 | |
Dmitry Torokhov | 534565f | 2007-04-25 00:53:18 -0400 | [diff] [blame] | 1895 | default: |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 1896 | pr_err("input_set_capability: unknown type %u (code %u)\n", |
| 1897 | type, code); |
Dmitry Torokhov | 534565f | 2007-04-25 00:53:18 -0400 | [diff] [blame] | 1898 | dump_stack(); |
| 1899 | return; |
| 1900 | } |
| 1901 | |
| 1902 | __set_bit(type, dev->evbit); |
| 1903 | } |
| 1904 | EXPORT_SYMBOL(input_set_capability); |
| 1905 | |
Jeff Brown | 80b4895 | 2011-04-18 10:08:02 -0700 | [diff] [blame] | 1906 | static unsigned int input_estimate_events_per_packet(struct input_dev *dev) |
| 1907 | { |
| 1908 | int mt_slots; |
| 1909 | int i; |
| 1910 | unsigned int events; |
| 1911 | |
Henrik Rydberg | 8d18fba | 2012-09-15 15:15:58 +0200 | [diff] [blame] | 1912 | if (dev->mt) { |
| 1913 | mt_slots = dev->mt->num_slots; |
Jeff Brown | 80b4895 | 2011-04-18 10:08:02 -0700 | [diff] [blame] | 1914 | } else if (test_bit(ABS_MT_TRACKING_ID, dev->absbit)) { |
| 1915 | mt_slots = dev->absinfo[ABS_MT_TRACKING_ID].maximum - |
| 1916 | dev->absinfo[ABS_MT_TRACKING_ID].minimum + 1, |
Hans Petter Selasky | 8c127f0 | 2011-05-25 09:24:32 -0700 | [diff] [blame] | 1917 | mt_slots = clamp(mt_slots, 2, 32); |
Jeff Brown | 80b4895 | 2011-04-18 10:08:02 -0700 | [diff] [blame] | 1918 | } else if (test_bit(ABS_MT_POSITION_X, dev->absbit)) { |
| 1919 | mt_slots = 2; |
| 1920 | } else { |
| 1921 | mt_slots = 0; |
| 1922 | } |
| 1923 | |
| 1924 | events = mt_slots + 1; /* count SYN_MT_REPORT and SYN_REPORT */ |
| 1925 | |
| 1926 | for (i = 0; i < ABS_CNT; i++) { |
| 1927 | if (test_bit(i, dev->absbit)) { |
| 1928 | if (input_is_mt_axis(i)) |
| 1929 | events += mt_slots; |
| 1930 | else |
| 1931 | events++; |
| 1932 | } |
| 1933 | } |
| 1934 | |
| 1935 | for (i = 0; i < REL_CNT; i++) |
| 1936 | if (test_bit(i, dev->relbit)) |
| 1937 | events++; |
| 1938 | |
Henrik Rydberg | 7c75bf9 | 2012-09-01 16:15:43 +0200 | [diff] [blame] | 1939 | /* Make room for KEY and MSC events */ |
| 1940 | events += 7; |
| 1941 | |
Jeff Brown | 80b4895 | 2011-04-18 10:08:02 -0700 | [diff] [blame] | 1942 | return events; |
| 1943 | } |
| 1944 | |
Dmitry Torokhov | 92a3a58 | 2010-01-05 17:56:01 -0800 | [diff] [blame] | 1945 | #define INPUT_CLEANSE_BITMASK(dev, type, bits) \ |
| 1946 | do { \ |
| 1947 | if (!test_bit(EV_##type, dev->evbit)) \ |
| 1948 | memset(dev->bits##bit, 0, \ |
| 1949 | sizeof(dev->bits##bit)); \ |
| 1950 | } while (0) |
| 1951 | |
| 1952 | static void input_cleanse_bitmasks(struct input_dev *dev) |
| 1953 | { |
| 1954 | INPUT_CLEANSE_BITMASK(dev, KEY, key); |
| 1955 | INPUT_CLEANSE_BITMASK(dev, REL, rel); |
| 1956 | INPUT_CLEANSE_BITMASK(dev, ABS, abs); |
| 1957 | INPUT_CLEANSE_BITMASK(dev, MSC, msc); |
| 1958 | INPUT_CLEANSE_BITMASK(dev, LED, led); |
| 1959 | INPUT_CLEANSE_BITMASK(dev, SND, snd); |
| 1960 | INPUT_CLEANSE_BITMASK(dev, FF, ff); |
| 1961 | INPUT_CLEANSE_BITMASK(dev, SW, sw); |
| 1962 | } |
| 1963 | |
Dmitry Torokhov | 2be975c | 2012-11-03 12:16:12 -0700 | [diff] [blame] | 1964 | static void __input_unregister_device(struct input_dev *dev) |
| 1965 | { |
| 1966 | struct input_handle *handle, *next; |
| 1967 | |
| 1968 | input_disconnect_device(dev); |
| 1969 | |
| 1970 | mutex_lock(&input_mutex); |
| 1971 | |
| 1972 | list_for_each_entry_safe(handle, next, &dev->h_list, d_node) |
| 1973 | handle->handler->disconnect(handle); |
| 1974 | WARN_ON(!list_empty(&dev->h_list)); |
| 1975 | |
| 1976 | del_timer_sync(&dev->timer); |
| 1977 | list_del_init(&dev->node); |
| 1978 | |
| 1979 | input_wakeup_procfs_readers(); |
| 1980 | |
| 1981 | mutex_unlock(&input_mutex); |
| 1982 | |
| 1983 | device_del(&dev->dev); |
| 1984 | } |
| 1985 | |
| 1986 | static void devm_input_device_unregister(struct device *dev, void *res) |
| 1987 | { |
| 1988 | struct input_devres *devres = res; |
| 1989 | struct input_dev *input = devres->input; |
| 1990 | |
| 1991 | dev_dbg(dev, "%s: unregistering device %s\n", |
| 1992 | __func__, dev_name(&input->dev)); |
| 1993 | __input_unregister_device(input); |
| 1994 | } |
| 1995 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1996 | /** |
| 1997 | * input_register_device - register device with input core |
| 1998 | * @dev: device to be registered |
| 1999 | * |
| 2000 | * This function registers device with input core. The device must be |
| 2001 | * allocated with input_allocate_device() and all it's capabilities |
| 2002 | * set up before registering. |
| 2003 | * If function fails the device must be freed with input_free_device(). |
| 2004 | * Once device has been successfully registered it can be unregistered |
| 2005 | * with input_unregister_device(); input_free_device() should not be |
| 2006 | * called in this case. |
| 2007 | */ |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 2008 | int input_register_device(struct input_dev *dev) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2009 | { |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 2010 | static atomic_t input_no = ATOMIC_INIT(0); |
Dmitry Torokhov | 2be975c | 2012-11-03 12:16:12 -0700 | [diff] [blame] | 2011 | struct input_devres *devres = NULL; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2012 | struct input_handler *handler; |
Henrik Rydberg | 7c75bf9 | 2012-09-01 16:15:43 +0200 | [diff] [blame] | 2013 | unsigned int packet_size; |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 2014 | const char *path; |
| 2015 | int error; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2016 | |
Dmitry Torokhov | 2be975c | 2012-11-03 12:16:12 -0700 | [diff] [blame] | 2017 | if (dev->devres_managed) { |
| 2018 | devres = devres_alloc(devm_input_device_unregister, |
| 2019 | sizeof(struct input_devres), GFP_KERNEL); |
| 2020 | if (!devres) |
| 2021 | return -ENOMEM; |
| 2022 | |
| 2023 | devres->input = dev; |
| 2024 | } |
| 2025 | |
Dmitry Torokhov | 4f93df4 | 2010-01-05 17:56:00 -0800 | [diff] [blame] | 2026 | /* Every input device generates EV_SYN/SYN_REPORT events. */ |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2027 | __set_bit(EV_SYN, dev->evbit); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2028 | |
Dmitry Torokhov | 4f93df4 | 2010-01-05 17:56:00 -0800 | [diff] [blame] | 2029 | /* KEY_RESERVED is not supposed to be transmitted to userspace. */ |
| 2030 | __clear_bit(KEY_RESERVED, dev->keybit); |
| 2031 | |
Dmitry Torokhov | 92a3a58 | 2010-01-05 17:56:01 -0800 | [diff] [blame] | 2032 | /* Make sure that bitmasks not mentioned in dev->evbit are clean. */ |
| 2033 | input_cleanse_bitmasks(dev); |
| 2034 | |
Henrik Rydberg | 7c75bf9 | 2012-09-01 16:15:43 +0200 | [diff] [blame] | 2035 | packet_size = input_estimate_events_per_packet(dev); |
| 2036 | if (dev->hint_events_per_packet < packet_size) |
| 2037 | dev->hint_events_per_packet = packet_size; |
Jeff Brown | 80b4895 | 2011-04-18 10:08:02 -0700 | [diff] [blame] | 2038 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame] | 2039 | dev->max_vals = max(dev->hint_events_per_packet, packet_size) + 2; |
| 2040 | dev->vals = kcalloc(dev->max_vals, sizeof(*dev->vals), GFP_KERNEL); |
Dmitry Torokhov | 2be975c | 2012-11-03 12:16:12 -0700 | [diff] [blame] | 2041 | if (!dev->vals) { |
| 2042 | error = -ENOMEM; |
| 2043 | goto err_devres_free; |
| 2044 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2045 | |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2046 | /* |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2047 | * If delay and period are pre-set by the driver, then autorepeating |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2048 | * is handled by the driver itself and we don't do it in input.c. |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 2049 | */ |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2050 | init_timer(&dev->timer); |
| 2051 | if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) { |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 2052 | dev->timer.data = (long) dev; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2053 | dev->timer.function = input_repeat_key; |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 2054 | dev->rep[REP_DELAY] = 250; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2055 | dev->rep[REP_PERIOD] = 33; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2056 | } |
| 2057 | |
| 2058 | if (!dev->getkeycode) |
| 2059 | dev->getkeycode = input_default_getkeycode; |
| 2060 | |
| 2061 | if (!dev->setkeycode) |
| 2062 | dev->setkeycode = input_default_setkeycode; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2063 | |
| 2064 | dev_set_name(&dev->dev, "input%ld", |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2065 | (unsigned long) atomic_inc_return(&input_no) - 1); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2066 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2067 | error = device_add(&dev->dev); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2068 | if (error) |
Dmitry Torokhov | 2be975c | 2012-11-03 12:16:12 -0700 | [diff] [blame] | 2069 | goto err_free_vals; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2070 | |
| 2071 | path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
| 2072 | pr_info("%s as %s\n", |
| 2073 | dev->name ? dev->name : "Unspecified device", |
| 2074 | path ? path : "N/A"); |
| 2075 | kfree(path); |
| 2076 | |
| 2077 | error = mutex_lock_interruptible(&input_mutex); |
Dmitry Torokhov | 2be975c | 2012-11-03 12:16:12 -0700 | [diff] [blame] | 2078 | if (error) |
| 2079 | goto err_device_del; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2080 | |
| 2081 | list_add_tail(&dev->node, &input_dev_list); |
| 2082 | |
| 2083 | list_for_each_entry(handler, &input_handler_list, node) |
| 2084 | input_attach_handler(dev, handler); |
| 2085 | |
| 2086 | input_wakeup_procfs_readers(); |
| 2087 | |
| 2088 | mutex_unlock(&input_mutex); |
| 2089 | |
Dmitry Torokhov | 2be975c | 2012-11-03 12:16:12 -0700 | [diff] [blame] | 2090 | if (dev->devres_managed) { |
| 2091 | dev_dbg(dev->dev.parent, "%s: registering %s with devres.\n", |
| 2092 | __func__, dev_name(&dev->dev)); |
| 2093 | devres_add(dev->dev.parent, devres); |
| 2094 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2095 | return 0; |
Dmitry Torokhov | 2be975c | 2012-11-03 12:16:12 -0700 | [diff] [blame] | 2096 | |
| 2097 | err_device_del: |
| 2098 | device_del(&dev->dev); |
| 2099 | err_free_vals: |
| 2100 | kfree(dev->vals); |
| 2101 | dev->vals = NULL; |
| 2102 | err_devres_free: |
| 2103 | devres_free(devres); |
| 2104 | return error; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2105 | } |
| 2106 | EXPORT_SYMBOL(input_register_device); |
| 2107 | |
| 2108 | /** |
| 2109 | * input_unregister_device - unregister previously registered device |
| 2110 | * @dev: device to be unregistered |
| 2111 | * |
| 2112 | * This function unregisters an input device. Once device is unregistered |
| 2113 | * the caller should not try to access it as it may get freed at any moment. |
| 2114 | */ |
| 2115 | void input_unregister_device(struct input_dev *dev) |
| 2116 | { |
Dmitry Torokhov | 2be975c | 2012-11-03 12:16:12 -0700 | [diff] [blame] | 2117 | if (dev->devres_managed) { |
| 2118 | WARN_ON(devres_destroy(dev->dev.parent, |
| 2119 | devm_input_device_unregister, |
| 2120 | devm_input_device_match, |
| 2121 | dev)); |
| 2122 | __input_unregister_device(dev); |
| 2123 | /* |
| 2124 | * We do not do input_put_device() here because it will be done |
| 2125 | * when 2nd devres fires up. |
| 2126 | */ |
| 2127 | } else { |
| 2128 | __input_unregister_device(dev); |
| 2129 | input_put_device(dev); |
| 2130 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2131 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 2132 | EXPORT_SYMBOL(input_unregister_device); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2133 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2134 | /** |
| 2135 | * input_register_handler - register a new input handler |
| 2136 | * @handler: handler to be registered |
| 2137 | * |
| 2138 | * This function registers a new input handler (interface) for input |
| 2139 | * devices in the system and attaches it to all input devices that |
| 2140 | * are compatible with the handler. |
| 2141 | */ |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 2142 | int input_register_handler(struct input_handler *handler) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2143 | { |
| 2144 | struct input_dev *dev; |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 2145 | int error; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2146 | |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 2147 | error = mutex_lock_interruptible(&input_mutex); |
| 2148 | if (error) |
| 2149 | return error; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2150 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2151 | INIT_LIST_HEAD(&handler->h_list); |
| 2152 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2153 | list_add_tail(&handler->node, &input_handler_list); |
| 2154 | |
| 2155 | list_for_each_entry(dev, &input_dev_list, node) |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2156 | input_attach_handler(dev, handler); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2157 | |
| 2158 | input_wakeup_procfs_readers(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2159 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2160 | mutex_unlock(&input_mutex); |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 2161 | return 0; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2162 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 2163 | EXPORT_SYMBOL(input_register_handler); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2164 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2165 | /** |
| 2166 | * input_unregister_handler - unregisters an input handler |
| 2167 | * @handler: handler to be unregistered |
| 2168 | * |
| 2169 | * This function disconnects a handler from its input devices and |
| 2170 | * removes it from lists of known handlers. |
| 2171 | */ |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2172 | void input_unregister_handler(struct input_handler *handler) |
| 2173 | { |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2174 | struct input_handle *handle, *next; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2175 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2176 | mutex_lock(&input_mutex); |
| 2177 | |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2178 | list_for_each_entry_safe(handle, next, &handler->h_list, h_node) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2179 | handler->disconnect(handle); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2180 | WARN_ON(!list_empty(&handler->h_list)); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2181 | |
| 2182 | list_del_init(&handler->node); |
| 2183 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2184 | input_wakeup_procfs_readers(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2185 | |
| 2186 | mutex_unlock(&input_mutex); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2187 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 2188 | EXPORT_SYMBOL(input_unregister_handler); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2189 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2190 | /** |
Dmitry Torokhov | 66d2a59 | 2009-12-01 21:54:35 -0800 | [diff] [blame] | 2191 | * input_handler_for_each_handle - handle iterator |
| 2192 | * @handler: input handler to iterate |
| 2193 | * @data: data for the callback |
| 2194 | * @fn: function to be called for each handle |
| 2195 | * |
| 2196 | * Iterate over @bus's list of devices, and call @fn for each, passing |
| 2197 | * it @data and stop when @fn returns a non-zero value. The function is |
| 2198 | * using RCU to traverse the list and therefore may be usind in atonic |
| 2199 | * contexts. The @fn callback is invoked from RCU critical section and |
| 2200 | * thus must not sleep. |
| 2201 | */ |
| 2202 | int input_handler_for_each_handle(struct input_handler *handler, void *data, |
| 2203 | int (*fn)(struct input_handle *, void *)) |
| 2204 | { |
| 2205 | struct input_handle *handle; |
| 2206 | int retval = 0; |
| 2207 | |
| 2208 | rcu_read_lock(); |
| 2209 | |
| 2210 | list_for_each_entry_rcu(handle, &handler->h_list, h_node) { |
| 2211 | retval = fn(handle, data); |
| 2212 | if (retval) |
| 2213 | break; |
| 2214 | } |
| 2215 | |
| 2216 | rcu_read_unlock(); |
| 2217 | |
| 2218 | return retval; |
| 2219 | } |
| 2220 | EXPORT_SYMBOL(input_handler_for_each_handle); |
| 2221 | |
| 2222 | /** |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2223 | * input_register_handle - register a new input handle |
| 2224 | * @handle: handle to register |
| 2225 | * |
| 2226 | * This function puts a new input handle onto device's |
| 2227 | * and handler's lists so that events can flow through |
| 2228 | * it once it is opened using input_open_device(). |
| 2229 | * |
| 2230 | * This function is supposed to be called from handler's |
| 2231 | * connect() method. |
| 2232 | */ |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2233 | int input_register_handle(struct input_handle *handle) |
| 2234 | { |
| 2235 | struct input_handler *handler = handle->handler; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2236 | struct input_dev *dev = handle->dev; |
| 2237 | int error; |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2238 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2239 | /* |
| 2240 | * We take dev->mutex here to prevent race with |
| 2241 | * input_release_device(). |
| 2242 | */ |
| 2243 | error = mutex_lock_interruptible(&dev->mutex); |
| 2244 | if (error) |
| 2245 | return error; |
Dmitry Torokhov | ef7995f | 2010-01-29 23:59:12 -0800 | [diff] [blame] | 2246 | |
| 2247 | /* |
| 2248 | * Filters go to the head of the list, normal handlers |
| 2249 | * to the tail. |
| 2250 | */ |
| 2251 | if (handler->filter) |
| 2252 | list_add_rcu(&handle->d_node, &dev->h_list); |
| 2253 | else |
| 2254 | list_add_tail_rcu(&handle->d_node, &dev->h_list); |
| 2255 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2256 | mutex_unlock(&dev->mutex); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2257 | |
| 2258 | /* |
| 2259 | * Since we are supposed to be called from ->connect() |
| 2260 | * which is mutually exclusive with ->disconnect() |
| 2261 | * we can't be racing with input_unregister_handle() |
| 2262 | * and so separate lock is not needed here. |
| 2263 | */ |
Dmitry Torokhov | 66d2a59 | 2009-12-01 21:54:35 -0800 | [diff] [blame] | 2264 | list_add_tail_rcu(&handle->h_node, &handler->h_list); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2265 | |
| 2266 | if (handler->start) |
| 2267 | handler->start(handle); |
| 2268 | |
| 2269 | return 0; |
| 2270 | } |
| 2271 | EXPORT_SYMBOL(input_register_handle); |
| 2272 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2273 | /** |
| 2274 | * input_unregister_handle - unregister an input handle |
| 2275 | * @handle: handle to unregister |
| 2276 | * |
| 2277 | * This function removes input handle from device's |
| 2278 | * and handler's lists. |
| 2279 | * |
| 2280 | * This function is supposed to be called from handler's |
| 2281 | * disconnect() method. |
| 2282 | */ |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2283 | void input_unregister_handle(struct input_handle *handle) |
| 2284 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2285 | struct input_dev *dev = handle->dev; |
| 2286 | |
Dmitry Torokhov | 66d2a59 | 2009-12-01 21:54:35 -0800 | [diff] [blame] | 2287 | list_del_rcu(&handle->h_node); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2288 | |
| 2289 | /* |
| 2290 | * Take dev->mutex to prevent race with input_release_device(). |
| 2291 | */ |
| 2292 | mutex_lock(&dev->mutex); |
| 2293 | list_del_rcu(&handle->d_node); |
| 2294 | mutex_unlock(&dev->mutex); |
Dmitry Torokhov | 66d2a59 | 2009-12-01 21:54:35 -0800 | [diff] [blame] | 2295 | |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 2296 | synchronize_rcu(); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2297 | } |
| 2298 | EXPORT_SYMBOL(input_unregister_handle); |
| 2299 | |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 2300 | /** |
| 2301 | * input_get_new_minor - allocates a new input minor number |
| 2302 | * @legacy_base: beginning or the legacy range to be searched |
| 2303 | * @legacy_num: size of legacy range |
| 2304 | * @allow_dynamic: whether we can also take ID from the dynamic range |
| 2305 | * |
| 2306 | * This function allocates a new device minor for from input major namespace. |
| 2307 | * Caller can request legacy minor by specifying @legacy_base and @legacy_num |
| 2308 | * parameters and whether ID can be allocated from dynamic range if there are |
| 2309 | * no free IDs in legacy range. |
| 2310 | */ |
| 2311 | int input_get_new_minor(int legacy_base, unsigned int legacy_num, |
| 2312 | bool allow_dynamic) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2313 | { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2314 | /* |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 2315 | * This function should be called from input handler's ->connect() |
| 2316 | * methods, which are serialized with input_mutex, so no additional |
| 2317 | * locking is needed here. |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2318 | */ |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 2319 | if (legacy_base >= 0) { |
| 2320 | int minor = ida_simple_get(&input_ida, |
| 2321 | legacy_base, |
| 2322 | legacy_base + legacy_num, |
| 2323 | GFP_KERNEL); |
| 2324 | if (minor >= 0 || !allow_dynamic) |
| 2325 | return minor; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2326 | } |
Arnd Bergmann | 2f2177c | 2010-03-09 20:38:48 -0800 | [diff] [blame] | 2327 | |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 2328 | return ida_simple_get(&input_ida, |
| 2329 | INPUT_FIRST_DYNAMIC_DEV, INPUT_MAX_CHAR_DEVICES, |
| 2330 | GFP_KERNEL); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2331 | } |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 2332 | EXPORT_SYMBOL(input_get_new_minor); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2333 | |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 2334 | /** |
| 2335 | * input_free_minor - release previously allocated minor |
| 2336 | * @minor: minor to be released |
| 2337 | * |
| 2338 | * This function releases previously allocated input minor so that it can be |
| 2339 | * reused later. |
| 2340 | */ |
| 2341 | void input_free_minor(unsigned int minor) |
| 2342 | { |
| 2343 | ida_simple_remove(&input_ida, minor); |
| 2344 | } |
| 2345 | EXPORT_SYMBOL(input_free_minor); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2346 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2347 | static int __init input_init(void) |
| 2348 | { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2349 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2350 | |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2351 | err = class_register(&input_class); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 2352 | if (err) { |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 2353 | pr_err("unable to register input_dev class\n"); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 2354 | return err; |
| 2355 | } |
| 2356 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2357 | err = input_proc_init(); |
| 2358 | if (err) |
Greg Kroah-Hartman | b0fdfeb | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2359 | goto fail1; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2360 | |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 2361 | err = register_chrdev_region(MKDEV(INPUT_MAJOR, 0), |
| 2362 | INPUT_MAX_CHAR_DEVICES, "input"); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2363 | if (err) { |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 2364 | pr_err("unable to register char major %d", INPUT_MAJOR); |
Greg Kroah-Hartman | b0fdfeb | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2365 | goto fail2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2366 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2367 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2368 | return 0; |
| 2369 | |
Greg Kroah-Hartman | b0fdfeb | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2370 | fail2: input_proc_exit(); |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2371 | fail1: class_unregister(&input_class); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2372 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2373 | } |
| 2374 | |
| 2375 | static void __exit input_exit(void) |
| 2376 | { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2377 | input_proc_exit(); |
Dmitry Torokhov | 7f8d4ca | 2012-10-08 09:07:24 -0700 | [diff] [blame] | 2378 | unregister_chrdev_region(MKDEV(INPUT_MAJOR, 0), |
| 2379 | INPUT_MAX_CHAR_DEVICES); |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2380 | class_unregister(&input_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2381 | } |
| 2382 | |
| 2383 | subsys_initcall(input_init); |
| 2384 | module_exit(input_exit); |