Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * The input core |
| 3 | * |
| 4 | * Copyright (c) 1999-2002 Vojtech Pavlik |
| 5 | */ |
| 6 | |
| 7 | /* |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License version 2 as published by |
| 10 | * the Free Software Foundation. |
| 11 | */ |
| 12 | |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 13 | #define pr_fmt(fmt) KBUILD_BASENAME ": " fmt |
| 14 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/init.h> |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 16 | #include <linux/types.h> |
Henrik Rydberg | 47c78e8 | 2010-11-27 09:16:48 +0100 | [diff] [blame] | 17 | #include <linux/input/mt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/random.h> |
| 21 | #include <linux/major.h> |
| 22 | #include <linux/proc_fs.h> |
Alexey Dobriyan | a99bbaf | 2009-10-04 16:11:37 +0400 | [diff] [blame] | 23 | #include <linux/sched.h> |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 24 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/poll.h> |
| 26 | #include <linux/device.h> |
Jes Sorensen | e676c23 | 2006-02-19 00:21:46 -0500 | [diff] [blame] | 27 | #include <linux/mutex.h> |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 28 | #include <linux/rcupdate.h> |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 29 | #include "input-compat.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
| 31 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); |
| 32 | MODULE_DESCRIPTION("Input core"); |
| 33 | MODULE_LICENSE("GPL"); |
| 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #define INPUT_DEVICES 256 |
| 36 | |
| 37 | static LIST_HEAD(input_dev_list); |
| 38 | static LIST_HEAD(input_handler_list); |
| 39 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 40 | /* |
| 41 | * input_mutex protects access to both input_dev_list and input_handler_list. |
| 42 | * This also causes input_[un]register_device and input_[un]register_handler |
| 43 | * be mutually exclusive which simplifies locking in drivers implementing |
| 44 | * input handlers. |
| 45 | */ |
| 46 | static DEFINE_MUTEX(input_mutex); |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | static struct input_handler *input_table[8]; |
| 49 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 50 | static const struct input_value input_value_sync = { EV_SYN, SYN_REPORT, 1 }; |
| 51 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 52 | static inline int is_event_supported(unsigned int code, |
| 53 | unsigned long *bm, unsigned int max) |
| 54 | { |
| 55 | return code <= max && test_bit(code, bm); |
| 56 | } |
| 57 | |
| 58 | static int input_defuzz_abs_event(int value, int old_val, int fuzz) |
| 59 | { |
| 60 | if (fuzz) { |
| 61 | if (value > old_val - fuzz / 2 && value < old_val + fuzz / 2) |
| 62 | return old_val; |
| 63 | |
| 64 | if (value > old_val - fuzz && value < old_val + fuzz) |
| 65 | return (old_val * 3 + value) / 4; |
| 66 | |
| 67 | if (value > old_val - fuzz * 2 && value < old_val + fuzz * 2) |
| 68 | return (old_val + value) / 2; |
| 69 | } |
| 70 | |
| 71 | return value; |
| 72 | } |
| 73 | |
Henrik Rydberg | 352ac4b | 2012-08-10 21:36:15 +0200 | [diff] [blame] | 74 | static void input_start_autorepeat(struct input_dev *dev, int code) |
| 75 | { |
| 76 | if (test_bit(EV_REP, dev->evbit) && |
| 77 | dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && |
| 78 | dev->timer.data) { |
| 79 | dev->repeat_key = code; |
| 80 | mod_timer(&dev->timer, |
| 81 | jiffies + msecs_to_jiffies(dev->rep[REP_DELAY])); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | static void input_stop_autorepeat(struct input_dev *dev) |
| 86 | { |
| 87 | del_timer(&dev->timer); |
| 88 | } |
| 89 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 90 | /* |
Dmitry Torokhov | ef7995f | 2010-01-29 23:59:12 -0800 | [diff] [blame] | 91 | * Pass event first through all filters and then, if event has not been |
| 92 | * filtered out, through all open handles. This function is called with |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 93 | * dev->event_lock held and interrupts disabled. |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 94 | */ |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 95 | static unsigned int input_to_handler(struct input_handle *handle, |
| 96 | struct input_value *vals, unsigned int count) |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 97 | { |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 98 | struct input_handler *handler = handle->handler; |
| 99 | struct input_value *end = vals; |
| 100 | struct input_value *v; |
| 101 | |
| 102 | for (v = vals; v != vals + count; v++) { |
| 103 | if (handler->filter && |
| 104 | handler->filter(handle, v->type, v->code, v->value)) |
| 105 | continue; |
| 106 | if (end != v) |
| 107 | *end = *v; |
| 108 | end++; |
| 109 | } |
| 110 | |
| 111 | count = end - vals; |
| 112 | if (!count) |
| 113 | return 0; |
| 114 | |
| 115 | if (handler->events) |
| 116 | handler->events(handle, vals, count); |
| 117 | else if (handler->event) |
| 118 | for (v = vals; v != end; v++) |
| 119 | handler->event(handle, v->type, v->code, v->value); |
| 120 | |
| 121 | return count; |
| 122 | } |
| 123 | |
| 124 | /* |
| 125 | * Pass values first through all filters and then, if event has not been |
| 126 | * filtered out, through all open handles. This function is called with |
| 127 | * dev->event_lock held and interrupts disabled. |
| 128 | */ |
| 129 | static void input_pass_values(struct input_dev *dev, |
| 130 | struct input_value *vals, unsigned int count) |
| 131 | { |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 132 | struct input_handle *handle; |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 133 | struct input_value *v; |
| 134 | |
| 135 | if (!count) |
| 136 | return; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 137 | |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 138 | rcu_read_lock(); |
| 139 | |
| 140 | handle = rcu_dereference(dev->grab); |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 141 | if (handle) { |
| 142 | count = input_to_handler(handle, vals, count); |
| 143 | } else { |
| 144 | list_for_each_entry_rcu(handle, &dev->h_list, d_node) |
| 145 | if (handle->open) |
| 146 | count = input_to_handler(handle, vals, count); |
Dmitry Torokhov | ef7995f | 2010-01-29 23:59:12 -0800 | [diff] [blame] | 147 | } |
| 148 | |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 149 | rcu_read_unlock(); |
Henrik Rydberg | 352ac4b | 2012-08-10 21:36:15 +0200 | [diff] [blame] | 150 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 151 | add_input_randomness(vals->type, vals->code, vals->value); |
Henrik Rydberg | 352ac4b | 2012-08-10 21:36:15 +0200 | [diff] [blame] | 152 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 153 | /* trigger auto repeat for key events */ |
| 154 | for (v = vals; v != vals + count; v++) { |
| 155 | if (v->type == EV_KEY && v->value != 2) { |
| 156 | if (v->value) |
| 157 | input_start_autorepeat(dev, v->code); |
| 158 | else |
| 159 | input_stop_autorepeat(dev); |
| 160 | } |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | static void input_pass_event(struct input_dev *dev, |
| 165 | unsigned int type, unsigned int code, int value) |
| 166 | { |
| 167 | struct input_value vals[] = { { type, code, value } }; |
| 168 | |
| 169 | input_pass_values(dev, vals, ARRAY_SIZE(vals)); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | /* |
| 173 | * Generate software autorepeat event. Note that we take |
| 174 | * dev->event_lock here to avoid racing with input_event |
| 175 | * which may cause keys get "stuck". |
| 176 | */ |
| 177 | static void input_repeat_key(unsigned long data) |
| 178 | { |
| 179 | struct input_dev *dev = (void *) data; |
| 180 | unsigned long flags; |
| 181 | |
| 182 | spin_lock_irqsave(&dev->event_lock, flags); |
| 183 | |
| 184 | if (test_bit(dev->repeat_key, dev->key) && |
| 185 | is_event_supported(dev->repeat_key, dev->keybit, KEY_MAX)) { |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 186 | struct input_value vals[] = { |
| 187 | { EV_KEY, dev->repeat_key, 2 }, |
| 188 | input_value_sync |
| 189 | }; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 190 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 191 | input_pass_values(dev, vals, ARRAY_SIZE(vals)); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 192 | |
| 193 | if (dev->rep[REP_PERIOD]) |
| 194 | mod_timer(&dev->timer, jiffies + |
| 195 | msecs_to_jiffies(dev->rep[REP_PERIOD])); |
| 196 | } |
| 197 | |
| 198 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 199 | } |
| 200 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 201 | #define INPUT_IGNORE_EVENT 0 |
| 202 | #define INPUT_PASS_TO_HANDLERS 1 |
| 203 | #define INPUT_PASS_TO_DEVICE 2 |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 204 | #define INPUT_SLOT 4 |
| 205 | #define INPUT_FLUSH 8 |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 206 | #define INPUT_PASS_TO_ALL (INPUT_PASS_TO_HANDLERS | INPUT_PASS_TO_DEVICE) |
| 207 | |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 208 | static int input_handle_abs_event(struct input_dev *dev, |
| 209 | unsigned int code, int *pval) |
| 210 | { |
Henrik Rydberg | 8d18fba | 2012-09-15 15:15:58 +0200 | [diff] [blame] | 211 | struct input_mt *mt = dev->mt; |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 212 | bool is_mt_event; |
| 213 | int *pold; |
| 214 | |
| 215 | if (code == ABS_MT_SLOT) { |
| 216 | /* |
| 217 | * "Stage" the event; we'll flush it later, when we |
Dmitry Torokhov | 144c0f8 | 2010-09-03 10:31:05 -0700 | [diff] [blame] | 218 | * get actual touch data. |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 219 | */ |
Henrik Rydberg | 8d18fba | 2012-09-15 15:15:58 +0200 | [diff] [blame] | 220 | if (mt && *pval >= 0 && *pval < mt->num_slots) |
| 221 | mt->slot = *pval; |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 222 | |
| 223 | return INPUT_IGNORE_EVENT; |
| 224 | } |
| 225 | |
Henrik Rydberg | b89529a | 2012-01-12 19:40:34 +0100 | [diff] [blame] | 226 | is_mt_event = input_is_mt_value(code); |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 227 | |
| 228 | if (!is_mt_event) { |
Daniel Mack | d31b286 | 2010-08-02 20:18:21 -0700 | [diff] [blame] | 229 | pold = &dev->absinfo[code].value; |
Henrik Rydberg | 8d18fba | 2012-09-15 15:15:58 +0200 | [diff] [blame] | 230 | } else if (mt) { |
| 231 | pold = &mt->slots[mt->slot].abs[code - ABS_MT_FIRST]; |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 232 | } else { |
| 233 | /* |
Dmitry Torokhov | 144c0f8 | 2010-09-03 10:31:05 -0700 | [diff] [blame] | 234 | * Bypass filtering for multi-touch events when |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 235 | * not employing slots. |
| 236 | */ |
| 237 | pold = NULL; |
| 238 | } |
| 239 | |
| 240 | if (pold) { |
| 241 | *pval = input_defuzz_abs_event(*pval, *pold, |
Daniel Mack | d31b286 | 2010-08-02 20:18:21 -0700 | [diff] [blame] | 242 | dev->absinfo[code].fuzz); |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 243 | if (*pold == *pval) |
| 244 | return INPUT_IGNORE_EVENT; |
| 245 | |
| 246 | *pold = *pval; |
| 247 | } |
| 248 | |
| 249 | /* Flush pending "slot" event */ |
Henrik Rydberg | 8d18fba | 2012-09-15 15:15:58 +0200 | [diff] [blame] | 250 | if (is_mt_event && mt && mt->slot != input_abs_get_val(dev, ABS_MT_SLOT)) { |
| 251 | input_abs_set_val(dev, ABS_MT_SLOT, mt->slot); |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 252 | return INPUT_PASS_TO_HANDLERS | INPUT_SLOT; |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 253 | } |
| 254 | |
| 255 | return INPUT_PASS_TO_HANDLERS; |
| 256 | } |
| 257 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 258 | static int input_get_disposition(struct input_dev *dev, |
| 259 | unsigned int type, unsigned int code, int value) |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 260 | { |
| 261 | int disposition = INPUT_IGNORE_EVENT; |
| 262 | |
| 263 | switch (type) { |
| 264 | |
| 265 | case EV_SYN: |
| 266 | switch (code) { |
| 267 | case SYN_CONFIG: |
| 268 | disposition = INPUT_PASS_TO_ALL; |
| 269 | break; |
| 270 | |
| 271 | case SYN_REPORT: |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 272 | disposition = INPUT_PASS_TO_HANDLERS | INPUT_FLUSH; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 273 | break; |
Henrik Rydberg | 5e5ee68 | 2009-04-28 07:47:33 -0700 | [diff] [blame] | 274 | case SYN_MT_REPORT: |
Henrik Rydberg | 5e5ee68 | 2009-04-28 07:47:33 -0700 | [diff] [blame] | 275 | disposition = INPUT_PASS_TO_HANDLERS; |
| 276 | break; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 277 | } |
| 278 | break; |
| 279 | |
| 280 | case EV_KEY: |
Henrik Rydberg | 0672120 | 2012-08-10 21:39:38 +0200 | [diff] [blame] | 281 | if (is_event_supported(code, dev->keybit, KEY_MAX)) { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 282 | |
Henrik Rydberg | 0672120 | 2012-08-10 21:39:38 +0200 | [diff] [blame] | 283 | /* auto-repeat bypasses state updates */ |
| 284 | if (value == 2) { |
| 285 | disposition = INPUT_PASS_TO_HANDLERS; |
| 286 | break; |
| 287 | } |
| 288 | |
| 289 | if (!!test_bit(code, dev->key) != !!value) { |
| 290 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 291 | __change_bit(code, dev->key); |
Henrik Rydberg | 0672120 | 2012-08-10 21:39:38 +0200 | [diff] [blame] | 292 | disposition = INPUT_PASS_TO_HANDLERS; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 293 | } |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 294 | } |
| 295 | break; |
| 296 | |
| 297 | case EV_SW: |
| 298 | if (is_event_supported(code, dev->swbit, SW_MAX) && |
Henrik Rydberg | 0672120 | 2012-08-10 21:39:38 +0200 | [diff] [blame] | 299 | !!test_bit(code, dev->sw) != !!value) { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 300 | |
| 301 | __change_bit(code, dev->sw); |
| 302 | disposition = INPUT_PASS_TO_HANDLERS; |
| 303 | } |
| 304 | break; |
| 305 | |
| 306 | case EV_ABS: |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 307 | if (is_event_supported(code, dev->absbit, ABS_MAX)) |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 308 | disposition = input_handle_abs_event(dev, code, &value); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 309 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 310 | break; |
| 311 | |
| 312 | case EV_REL: |
| 313 | if (is_event_supported(code, dev->relbit, REL_MAX) && value) |
| 314 | disposition = INPUT_PASS_TO_HANDLERS; |
| 315 | |
| 316 | break; |
| 317 | |
| 318 | case EV_MSC: |
| 319 | if (is_event_supported(code, dev->mscbit, MSC_MAX)) |
| 320 | disposition = INPUT_PASS_TO_ALL; |
| 321 | |
| 322 | break; |
| 323 | |
| 324 | case EV_LED: |
| 325 | if (is_event_supported(code, dev->ledbit, LED_MAX) && |
Henrik Rydberg | 0672120 | 2012-08-10 21:39:38 +0200 | [diff] [blame] | 326 | !!test_bit(code, dev->led) != !!value) { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 327 | |
| 328 | __change_bit(code, dev->led); |
| 329 | disposition = INPUT_PASS_TO_ALL; |
| 330 | } |
| 331 | break; |
| 332 | |
| 333 | case EV_SND: |
| 334 | if (is_event_supported(code, dev->sndbit, SND_MAX)) { |
| 335 | |
| 336 | if (!!test_bit(code, dev->snd) != !!value) |
| 337 | __change_bit(code, dev->snd); |
| 338 | disposition = INPUT_PASS_TO_ALL; |
| 339 | } |
| 340 | break; |
| 341 | |
| 342 | case EV_REP: |
| 343 | if (code <= REP_MAX && value >= 0 && dev->rep[code] != value) { |
| 344 | dev->rep[code] = value; |
| 345 | disposition = INPUT_PASS_TO_ALL; |
| 346 | } |
| 347 | break; |
| 348 | |
| 349 | case EV_FF: |
| 350 | if (value >= 0) |
| 351 | disposition = INPUT_PASS_TO_ALL; |
| 352 | break; |
Richard Purdie | ed2fa4d | 2008-01-03 10:46:21 -0500 | [diff] [blame] | 353 | |
| 354 | case EV_PWR: |
| 355 | disposition = INPUT_PASS_TO_ALL; |
| 356 | break; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 357 | } |
| 358 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 359 | return disposition; |
| 360 | } |
| 361 | |
| 362 | static void input_handle_event(struct input_dev *dev, |
| 363 | unsigned int type, unsigned int code, int value) |
| 364 | { |
| 365 | int disposition; |
| 366 | |
| 367 | disposition = input_get_disposition(dev, type, code, value); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 368 | |
| 369 | if ((disposition & INPUT_PASS_TO_DEVICE) && dev->event) |
| 370 | dev->event(dev, type, code, value); |
| 371 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 372 | if (!dev->vals) |
| 373 | return; |
| 374 | |
| 375 | if (disposition & INPUT_PASS_TO_HANDLERS) { |
| 376 | struct input_value *v; |
| 377 | |
| 378 | if (disposition & INPUT_SLOT) { |
| 379 | v = &dev->vals[dev->num_vals++]; |
| 380 | v->type = EV_ABS; |
| 381 | v->code = ABS_MT_SLOT; |
| 382 | v->value = dev->mt->slot; |
| 383 | } |
| 384 | |
| 385 | v = &dev->vals[dev->num_vals++]; |
| 386 | v->type = type; |
| 387 | v->code = code; |
| 388 | v->value = value; |
| 389 | } |
| 390 | |
| 391 | if (disposition & INPUT_FLUSH) { |
| 392 | if (dev->num_vals >= 2) |
| 393 | input_pass_values(dev, dev->vals, dev->num_vals); |
| 394 | dev->num_vals = 0; |
| 395 | } else if (dev->num_vals >= dev->max_vals - 2) { |
| 396 | dev->vals[dev->num_vals++] = input_value_sync; |
| 397 | input_pass_values(dev, dev->vals, dev->num_vals); |
| 398 | dev->num_vals = 0; |
| 399 | } |
| 400 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 401 | } |
| 402 | |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 403 | /** |
| 404 | * input_event() - report new input event |
Dmitry Torokhov | 1447190 | 2006-11-02 23:26:55 -0500 | [diff] [blame] | 405 | * @dev: device that generated the event |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 406 | * @type: type of the event |
| 407 | * @code: event code |
| 408 | * @value: value of the event |
| 409 | * |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 410 | * This function should be used by drivers implementing various input |
Dmitry Torokhov | df2d463 | 2009-12-11 21:57:31 -0800 | [diff] [blame] | 411 | * devices to report input events. See also input_inject_event(). |
| 412 | * |
| 413 | * NOTE: input_event() may be safely used right after input device was |
| 414 | * allocated with input_allocate_device(), even before it is registered |
| 415 | * with input_register_device(), but the event will not reach any of the |
| 416 | * input handlers. Such early invocation of input_event() may be used |
| 417 | * to 'seed' initial state of a switch or initial position of absolute |
| 418 | * axis, etc. |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 419 | */ |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 420 | void input_event(struct input_dev *dev, |
| 421 | unsigned int type, unsigned int code, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 423 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 425 | if (is_event_supported(type, dev->evbit, EV_MAX)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 427 | spin_lock_irqsave(&dev->event_lock, flags); |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 428 | input_handle_event(dev, type, code, value); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 429 | spin_unlock_irqrestore(&dev->event_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 432 | EXPORT_SYMBOL(input_event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 434 | /** |
| 435 | * input_inject_event() - send input event from input handler |
| 436 | * @handle: input handle to send event through |
| 437 | * @type: type of the event |
| 438 | * @code: event code |
| 439 | * @value: value of the event |
| 440 | * |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 441 | * Similar to input_event() but will ignore event if device is |
| 442 | * "grabbed" and handle injecting event is not the one that owns |
| 443 | * the device. |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 444 | */ |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 445 | void input_inject_event(struct input_handle *handle, |
| 446 | unsigned int type, unsigned int code, int value) |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 447 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 448 | struct input_dev *dev = handle->dev; |
| 449 | struct input_handle *grab; |
| 450 | unsigned long flags; |
| 451 | |
| 452 | if (is_event_supported(type, dev->evbit, EV_MAX)) { |
| 453 | spin_lock_irqsave(&dev->event_lock, flags); |
| 454 | |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 455 | rcu_read_lock(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 456 | grab = rcu_dereference(dev->grab); |
| 457 | if (!grab || grab == handle) |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 458 | input_handle_event(dev, type, code, value); |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 459 | rcu_read_unlock(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 460 | |
| 461 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 462 | } |
Dmitry Torokhov | 0e739d2 | 2006-07-06 00:22:43 -0400 | [diff] [blame] | 463 | } |
| 464 | EXPORT_SYMBOL(input_inject_event); |
| 465 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 466 | /** |
Daniel Mack | d31b286 | 2010-08-02 20:18:21 -0700 | [diff] [blame] | 467 | * input_alloc_absinfo - allocates array of input_absinfo structs |
| 468 | * @dev: the input device emitting absolute events |
| 469 | * |
| 470 | * If the absinfo struct the caller asked for is already allocated, this |
| 471 | * functions will not do anything. |
| 472 | */ |
| 473 | void input_alloc_absinfo(struct input_dev *dev) |
| 474 | { |
| 475 | if (!dev->absinfo) |
| 476 | dev->absinfo = kcalloc(ABS_CNT, sizeof(struct input_absinfo), |
| 477 | GFP_KERNEL); |
| 478 | |
| 479 | WARN(!dev->absinfo, "%s(): kcalloc() failed?\n", __func__); |
| 480 | } |
| 481 | EXPORT_SYMBOL(input_alloc_absinfo); |
| 482 | |
| 483 | void input_set_abs_params(struct input_dev *dev, unsigned int axis, |
| 484 | int min, int max, int fuzz, int flat) |
| 485 | { |
| 486 | struct input_absinfo *absinfo; |
| 487 | |
| 488 | input_alloc_absinfo(dev); |
| 489 | if (!dev->absinfo) |
| 490 | return; |
| 491 | |
| 492 | absinfo = &dev->absinfo[axis]; |
| 493 | absinfo->minimum = min; |
| 494 | absinfo->maximum = max; |
| 495 | absinfo->fuzz = fuzz; |
| 496 | absinfo->flat = flat; |
| 497 | |
| 498 | dev->absbit[BIT_WORD(axis)] |= BIT_MASK(axis); |
| 499 | } |
| 500 | EXPORT_SYMBOL(input_set_abs_params); |
| 501 | |
| 502 | |
| 503 | /** |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 504 | * input_grab_device - grabs device for exclusive use |
| 505 | * @handle: input handle that wants to own the device |
| 506 | * |
| 507 | * When a device is grabbed by an input handle all events generated by |
| 508 | * the device are delivered only to this handle. Also events injected |
| 509 | * by other input handles are ignored while device is grabbed. |
| 510 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | int input_grab_device(struct input_handle *handle) |
| 512 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 513 | struct input_dev *dev = handle->dev; |
| 514 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 516 | retval = mutex_lock_interruptible(&dev->mutex); |
| 517 | if (retval) |
| 518 | return retval; |
| 519 | |
| 520 | if (dev->grab) { |
| 521 | retval = -EBUSY; |
| 522 | goto out; |
| 523 | } |
| 524 | |
| 525 | rcu_assign_pointer(dev->grab, handle); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 526 | |
| 527 | out: |
| 528 | mutex_unlock(&dev->mutex); |
| 529 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 531 | EXPORT_SYMBOL(input_grab_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 533 | static void __input_release_device(struct input_handle *handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | { |
Andrew Morton | a2b2ed2 | 2006-07-15 01:17:38 -0400 | [diff] [blame] | 535 | struct input_dev *dev = handle->dev; |
Dmitry Torokhov | c7e8dc6 | 2006-07-06 00:21:03 -0400 | [diff] [blame] | 536 | |
Andrew Morton | a2b2ed2 | 2006-07-15 01:17:38 -0400 | [diff] [blame] | 537 | if (dev->grab == handle) { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 538 | rcu_assign_pointer(dev->grab, NULL); |
| 539 | /* Make sure input_pass_event() notices that grab is gone */ |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 540 | synchronize_rcu(); |
Andrew Morton | a2b2ed2 | 2006-07-15 01:17:38 -0400 | [diff] [blame] | 541 | |
| 542 | list_for_each_entry(handle, &dev->h_list, d_node) |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 543 | if (handle->open && handle->handler->start) |
Dmitry Torokhov | c7e8dc6 | 2006-07-06 00:21:03 -0400 | [diff] [blame] | 544 | handle->handler->start(handle); |
| 545 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | } |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 547 | |
| 548 | /** |
| 549 | * input_release_device - release previously grabbed device |
| 550 | * @handle: input handle that owns the device |
| 551 | * |
| 552 | * Releases previously grabbed device so that other input handles can |
| 553 | * start receiving input events. Upon release all handlers attached |
| 554 | * to the device have their start() method called so they have a change |
| 555 | * to synchronize device state with the rest of the system. |
| 556 | */ |
| 557 | void input_release_device(struct input_handle *handle) |
| 558 | { |
| 559 | struct input_dev *dev = handle->dev; |
| 560 | |
| 561 | mutex_lock(&dev->mutex); |
| 562 | __input_release_device(handle); |
| 563 | mutex_unlock(&dev->mutex); |
| 564 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 565 | EXPORT_SYMBOL(input_release_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 567 | /** |
| 568 | * input_open_device - open input device |
| 569 | * @handle: handle through which device is being accessed |
| 570 | * |
| 571 | * This function should be called by input handlers when they |
| 572 | * want to start receive events from given input device. |
| 573 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | int input_open_device(struct input_handle *handle) |
| 575 | { |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 576 | struct input_dev *dev = handle->dev; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 577 | int retval; |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 578 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 579 | retval = mutex_lock_interruptible(&dev->mutex); |
| 580 | if (retval) |
| 581 | return retval; |
| 582 | |
| 583 | if (dev->going_away) { |
| 584 | retval = -ENODEV; |
| 585 | goto out; |
| 586 | } |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 587 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | handle->open++; |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 589 | |
| 590 | if (!dev->users++ && dev->open) |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 591 | retval = dev->open(dev); |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 592 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 593 | if (retval) { |
| 594 | dev->users--; |
| 595 | if (!--handle->open) { |
| 596 | /* |
| 597 | * Make sure we are not delivering any more events |
| 598 | * through this handle |
| 599 | */ |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 600 | synchronize_rcu(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 601 | } |
| 602 | } |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 603 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 604 | out: |
Jes Sorensen | e676c23 | 2006-02-19 00:21:46 -0500 | [diff] [blame] | 605 | mutex_unlock(&dev->mutex); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 606 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 608 | EXPORT_SYMBOL(input_open_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 610 | int input_flush_device(struct input_handle *handle, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 612 | struct input_dev *dev = handle->dev; |
| 613 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 615 | retval = mutex_lock_interruptible(&dev->mutex); |
| 616 | if (retval) |
| 617 | return retval; |
| 618 | |
| 619 | if (dev->flush) |
| 620 | retval = dev->flush(dev, file); |
| 621 | |
| 622 | mutex_unlock(&dev->mutex); |
| 623 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 625 | EXPORT_SYMBOL(input_flush_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 627 | /** |
| 628 | * input_close_device - close input device |
| 629 | * @handle: handle through which device is being accessed |
| 630 | * |
| 631 | * This function should be called by input handlers when they |
| 632 | * want to stop receive events from given input device. |
| 633 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | void input_close_device(struct input_handle *handle) |
| 635 | { |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 636 | struct input_dev *dev = handle->dev; |
| 637 | |
Jes Sorensen | e676c23 | 2006-02-19 00:21:46 -0500 | [diff] [blame] | 638 | mutex_lock(&dev->mutex); |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 639 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 640 | __input_release_device(handle); |
| 641 | |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 642 | if (!--dev->users && dev->close) |
| 643 | dev->close(dev); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 644 | |
| 645 | if (!--handle->open) { |
| 646 | /* |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 647 | * synchronize_rcu() makes sure that input_pass_event() |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 648 | * completed and that no more input events are delivered |
| 649 | * through this handle |
| 650 | */ |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 651 | synchronize_rcu(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 652 | } |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 653 | |
Jes Sorensen | e676c23 | 2006-02-19 00:21:46 -0500 | [diff] [blame] | 654 | mutex_unlock(&dev->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 656 | EXPORT_SYMBOL(input_close_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 658 | /* |
Oliver Neukum | 866d7d7 | 2010-07-01 09:01:50 -0700 | [diff] [blame] | 659 | * Simulate keyup events for all keys that are marked as pressed. |
| 660 | * The function must be called with dev->event_lock held. |
| 661 | */ |
| 662 | static void input_dev_release_keys(struct input_dev *dev) |
| 663 | { |
| 664 | int code; |
| 665 | |
| 666 | if (is_event_supported(EV_KEY, dev->evbit, EV_MAX)) { |
| 667 | for (code = 0; code <= KEY_MAX; code++) { |
| 668 | if (is_event_supported(code, dev->keybit, KEY_MAX) && |
| 669 | __test_and_clear_bit(code, dev->key)) { |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 670 | input_pass_event(dev, EV_KEY, code, 0); |
Oliver Neukum | 866d7d7 | 2010-07-01 09:01:50 -0700 | [diff] [blame] | 671 | } |
| 672 | } |
Dmitry Torokhov | 9ae4345 | 2011-02-02 23:04:27 -0800 | [diff] [blame] | 673 | input_pass_event(dev, EV_SYN, SYN_REPORT, 1); |
Oliver Neukum | 866d7d7 | 2010-07-01 09:01:50 -0700 | [diff] [blame] | 674 | } |
| 675 | } |
| 676 | |
| 677 | /* |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 678 | * Prepare device for unregistering |
| 679 | */ |
| 680 | static void input_disconnect_device(struct input_dev *dev) |
| 681 | { |
| 682 | struct input_handle *handle; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 683 | |
| 684 | /* |
| 685 | * Mark device as going away. Note that we take dev->mutex here |
| 686 | * not to protect access to dev->going_away but rather to ensure |
| 687 | * that there are no threads in the middle of input_open_device() |
| 688 | */ |
| 689 | mutex_lock(&dev->mutex); |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 690 | dev->going_away = true; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 691 | mutex_unlock(&dev->mutex); |
| 692 | |
| 693 | spin_lock_irq(&dev->event_lock); |
| 694 | |
| 695 | /* |
| 696 | * Simulate keyup events for all pressed keys so that handlers |
| 697 | * are not left with "stuck" keys. The driver may continue |
| 698 | * generate events even after we done here but they will not |
| 699 | * reach any handlers. |
| 700 | */ |
Oliver Neukum | 866d7d7 | 2010-07-01 09:01:50 -0700 | [diff] [blame] | 701 | input_dev_release_keys(dev); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 702 | |
| 703 | list_for_each_entry(handle, &dev->h_list, d_node) |
| 704 | handle->open = 0; |
| 705 | |
| 706 | spin_unlock_irq(&dev->event_lock); |
| 707 | } |
| 708 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 709 | /** |
| 710 | * input_scancode_to_scalar() - converts scancode in &struct input_keymap_entry |
| 711 | * @ke: keymap entry containing scancode to be converted. |
| 712 | * @scancode: pointer to the location where converted scancode should |
| 713 | * be stored. |
| 714 | * |
| 715 | * This function is used to convert scancode stored in &struct keymap_entry |
| 716 | * into scalar form understood by legacy keymap handling methods. These |
| 717 | * methods expect scancodes to be represented as 'unsigned int'. |
| 718 | */ |
| 719 | int input_scancode_to_scalar(const struct input_keymap_entry *ke, |
| 720 | unsigned int *scancode) |
| 721 | { |
| 722 | switch (ke->len) { |
| 723 | case 1: |
| 724 | *scancode = *((u8 *)ke->scancode); |
| 725 | break; |
| 726 | |
| 727 | case 2: |
| 728 | *scancode = *((u16 *)ke->scancode); |
| 729 | break; |
| 730 | |
| 731 | case 4: |
| 732 | *scancode = *((u32 *)ke->scancode); |
| 733 | break; |
| 734 | |
| 735 | default: |
| 736 | return -EINVAL; |
| 737 | } |
| 738 | |
| 739 | return 0; |
| 740 | } |
| 741 | EXPORT_SYMBOL(input_scancode_to_scalar); |
| 742 | |
| 743 | /* |
| 744 | * Those routines handle the default case where no [gs]etkeycode() is |
| 745 | * defined. In this case, an array indexed by the scancode is used. |
| 746 | */ |
| 747 | |
| 748 | static unsigned int input_fetch_keycode(struct input_dev *dev, |
| 749 | unsigned int index) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 750 | { |
| 751 | switch (dev->keycodesize) { |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 752 | case 1: |
| 753 | return ((u8 *)dev->keycode)[index]; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 754 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 755 | case 2: |
| 756 | return ((u16 *)dev->keycode)[index]; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 757 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 758 | default: |
| 759 | return ((u32 *)dev->keycode)[index]; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 760 | } |
| 761 | } |
| 762 | |
| 763 | static int input_default_getkeycode(struct input_dev *dev, |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 764 | struct input_keymap_entry *ke) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 765 | { |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 766 | unsigned int index; |
| 767 | int error; |
| 768 | |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 769 | if (!dev->keycodesize) |
| 770 | return -EINVAL; |
| 771 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 772 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) |
| 773 | index = ke->index; |
| 774 | else { |
| 775 | error = input_scancode_to_scalar(ke, &index); |
| 776 | if (error) |
| 777 | return error; |
| 778 | } |
| 779 | |
| 780 | if (index >= dev->keycodemax) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 781 | return -EINVAL; |
| 782 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 783 | ke->keycode = input_fetch_keycode(dev, index); |
| 784 | ke->index = index; |
| 785 | ke->len = sizeof(index); |
| 786 | memcpy(ke->scancode, &index, sizeof(index)); |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 787 | |
| 788 | return 0; |
| 789 | } |
| 790 | |
| 791 | static int input_default_setkeycode(struct input_dev *dev, |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 792 | const struct input_keymap_entry *ke, |
| 793 | unsigned int *old_keycode) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 794 | { |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 795 | unsigned int index; |
| 796 | int error; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 797 | int i; |
| 798 | |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 799 | if (!dev->keycodesize) |
| 800 | return -EINVAL; |
| 801 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 802 | if (ke->flags & INPUT_KEYMAP_BY_INDEX) { |
| 803 | index = ke->index; |
| 804 | } else { |
| 805 | error = input_scancode_to_scalar(ke, &index); |
| 806 | if (error) |
| 807 | return error; |
| 808 | } |
| 809 | |
| 810 | if (index >= dev->keycodemax) |
| 811 | return -EINVAL; |
| 812 | |
Mattia Dongili | de391d1 | 2010-11-18 09:06:43 -0800 | [diff] [blame] | 813 | if (dev->keycodesize < sizeof(ke->keycode) && |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 814 | (ke->keycode >> (dev->keycodesize * 8))) |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 815 | return -EINVAL; |
| 816 | |
| 817 | switch (dev->keycodesize) { |
| 818 | case 1: { |
| 819 | u8 *k = (u8 *)dev->keycode; |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 820 | *old_keycode = k[index]; |
| 821 | k[index] = ke->keycode; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 822 | break; |
| 823 | } |
| 824 | case 2: { |
| 825 | u16 *k = (u16 *)dev->keycode; |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 826 | *old_keycode = k[index]; |
| 827 | k[index] = ke->keycode; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 828 | break; |
| 829 | } |
| 830 | default: { |
| 831 | u32 *k = (u32 *)dev->keycode; |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 832 | *old_keycode = k[index]; |
| 833 | k[index] = ke->keycode; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 834 | break; |
| 835 | } |
| 836 | } |
| 837 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 838 | __clear_bit(*old_keycode, dev->keybit); |
| 839 | __set_bit(ke->keycode, dev->keybit); |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 840 | |
| 841 | for (i = 0; i < dev->keycodemax; i++) { |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 842 | if (input_fetch_keycode(dev, i) == *old_keycode) { |
| 843 | __set_bit(*old_keycode, dev->keybit); |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 844 | break; /* Setting the bit twice is useless, so break */ |
| 845 | } |
| 846 | } |
| 847 | |
| 848 | return 0; |
| 849 | } |
| 850 | |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 851 | /** |
| 852 | * input_get_keycode - retrieve keycode currently mapped to a given scancode |
| 853 | * @dev: input device which keymap is being queried |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 854 | * @ke: keymap entry |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 855 | * |
| 856 | * This function should be called by anyone interested in retrieving current |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 857 | * keymap. Presently evdev handlers use it. |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 858 | */ |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 859 | 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] | 860 | { |
Dmitry Torokhov | 2e2e3b9 | 2010-03-21 22:56:15 -0700 | [diff] [blame] | 861 | unsigned long flags; |
| 862 | int retval; |
| 863 | |
| 864 | spin_lock_irqsave(&dev->event_lock, flags); |
Dmitry Torokhov | aebd636 | 2011-01-31 21:06:39 -0800 | [diff] [blame] | 865 | retval = dev->getkeycode(dev, ke); |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 866 | spin_unlock_irqrestore(&dev->event_lock, flags); |
Dmitry Torokhov | aebd636 | 2011-01-31 21:06:39 -0800 | [diff] [blame] | 867 | |
Dmitry Torokhov | 2e2e3b9 | 2010-03-21 22:56:15 -0700 | [diff] [blame] | 868 | return retval; |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 869 | } |
| 870 | EXPORT_SYMBOL(input_get_keycode); |
| 871 | |
| 872 | /** |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 873 | * input_set_keycode - attribute a keycode to a given scancode |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 874 | * @dev: input device which keymap is being updated |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 875 | * @ke: new keymap entry |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 876 | * |
| 877 | * This function should be called by anyone needing to update current |
| 878 | * keymap. Presently keyboard and evdev handlers use it. |
| 879 | */ |
Dmitry Torokhov | 58b9399 | 2010-03-08 22:37:10 -0800 | [diff] [blame] | 880 | int input_set_keycode(struct input_dev *dev, |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 881 | const struct input_keymap_entry *ke) |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 882 | { |
| 883 | unsigned long flags; |
Dmitry Torokhov | fd6cf3d | 2010-07-14 00:25:21 -0700 | [diff] [blame] | 884 | unsigned int old_keycode; |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 885 | int retval; |
| 886 | |
Mauro Carvalho Chehab | 8613e4c | 2010-09-09 21:54:22 -0700 | [diff] [blame] | 887 | if (ke->keycode > KEY_MAX) |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 888 | return -EINVAL; |
| 889 | |
| 890 | spin_lock_irqsave(&dev->event_lock, flags); |
| 891 | |
Dmitry Torokhov | aebd636 | 2011-01-31 21:06:39 -0800 | [diff] [blame] | 892 | retval = dev->setkeycode(dev, ke, &old_keycode); |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 893 | if (retval) |
| 894 | goto out; |
| 895 | |
Dmitry Torokhov | 4f93df4 | 2010-01-05 17:56:00 -0800 | [diff] [blame] | 896 | /* Make sure KEY_RESERVED did not get enabled. */ |
| 897 | __clear_bit(KEY_RESERVED, dev->keybit); |
| 898 | |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 899 | /* |
| 900 | * Simulate keyup event if keycode is not present |
| 901 | * in the keymap anymore |
| 902 | */ |
| 903 | if (test_bit(EV_KEY, dev->evbit) && |
| 904 | !is_event_supported(old_keycode, dev->keybit, KEY_MAX) && |
| 905 | __test_and_clear_bit(old_keycode, dev->key)) { |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 906 | struct input_value vals[] = { |
| 907 | { EV_KEY, old_keycode, 0 }, |
| 908 | input_value_sync |
| 909 | }; |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 910 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 911 | input_pass_values(dev, vals, ARRAY_SIZE(vals)); |
Dmitry Torokhov | f4f37c8 | 2007-11-04 00:41:12 -0400 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | out: |
| 915 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 916 | |
| 917 | return retval; |
| 918 | } |
| 919 | EXPORT_SYMBOL(input_set_keycode); |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 920 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | #define MATCH_BIT(bit, max) \ |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 922 | for (i = 0; i < BITS_TO_LONGS(max); i++) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \ |
| 924 | break; \ |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 925 | if (i != BITS_TO_LONGS(max)) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | continue; |
| 927 | |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 928 | 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] | 929 | struct input_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | { |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 931 | const struct input_device_id *id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | int i; |
| 933 | |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 934 | for (id = handler->id_table; id->flags || id->driver_info; id++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | |
| 936 | if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) |
Dmitry Torokhov | ddc5d34 | 2006-04-26 00:14:19 -0400 | [diff] [blame] | 937 | if (id->bustype != dev->id.bustype) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | continue; |
| 939 | |
| 940 | if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) |
Dmitry Torokhov | ddc5d34 | 2006-04-26 00:14:19 -0400 | [diff] [blame] | 941 | if (id->vendor != dev->id.vendor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | continue; |
| 943 | |
| 944 | if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) |
Dmitry Torokhov | ddc5d34 | 2006-04-26 00:14:19 -0400 | [diff] [blame] | 945 | if (id->product != dev->id.product) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | continue; |
| 947 | |
| 948 | if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) |
Dmitry Torokhov | ddc5d34 | 2006-04-26 00:14:19 -0400 | [diff] [blame] | 949 | if (id->version != dev->id.version) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | continue; |
| 951 | |
| 952 | MATCH_BIT(evbit, EV_MAX); |
| 953 | MATCH_BIT(keybit, KEY_MAX); |
| 954 | MATCH_BIT(relbit, REL_MAX); |
| 955 | MATCH_BIT(absbit, ABS_MAX); |
| 956 | MATCH_BIT(mscbit, MSC_MAX); |
| 957 | MATCH_BIT(ledbit, LED_MAX); |
| 958 | MATCH_BIT(sndbit, SND_MAX); |
| 959 | MATCH_BIT(ffbit, FF_MAX); |
Dmitry Torokhov | ff13f98 | 2005-09-24 02:02:29 -0500 | [diff] [blame] | 960 | MATCH_BIT(swbit, SW_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 962 | if (!handler->match || handler->match(handler, dev)) |
| 963 | return id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | } |
| 965 | |
| 966 | return NULL; |
| 967 | } |
| 968 | |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 969 | static int input_attach_handler(struct input_dev *dev, struct input_handler *handler) |
| 970 | { |
| 971 | const struct input_device_id *id; |
| 972 | int error; |
| 973 | |
Dmitry Torokhov | 0b7024ac | 2010-02-02 21:08:26 -0800 | [diff] [blame] | 974 | id = input_match_device(handler, dev); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 975 | if (!id) |
| 976 | return -ENODEV; |
| 977 | |
| 978 | error = handler->connect(handler, dev, id); |
| 979 | if (error && error != -ENODEV) |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 980 | pr_err("failed to attach handler %s to device %s, error: %d\n", |
| 981 | handler->name, kobject_name(&dev->dev.kobj), error); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 982 | |
| 983 | return error; |
| 984 | } |
| 985 | |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 986 | #ifdef CONFIG_COMPAT |
| 987 | |
| 988 | static int input_bits_to_string(char *buf, int buf_size, |
| 989 | unsigned long bits, bool skip_empty) |
| 990 | { |
| 991 | int len = 0; |
| 992 | |
| 993 | if (INPUT_COMPAT_TEST) { |
| 994 | u32 dword = bits >> 32; |
| 995 | if (dword || !skip_empty) |
| 996 | len += snprintf(buf, buf_size, "%x ", dword); |
| 997 | |
| 998 | dword = bits & 0xffffffffUL; |
| 999 | if (dword || !skip_empty || len) |
| 1000 | len += snprintf(buf + len, max(buf_size - len, 0), |
| 1001 | "%x", dword); |
| 1002 | } else { |
| 1003 | if (bits || !skip_empty) |
| 1004 | len += snprintf(buf, buf_size, "%lx", bits); |
| 1005 | } |
| 1006 | |
| 1007 | return len; |
| 1008 | } |
| 1009 | |
| 1010 | #else /* !CONFIG_COMPAT */ |
| 1011 | |
| 1012 | static int input_bits_to_string(char *buf, int buf_size, |
| 1013 | unsigned long bits, bool skip_empty) |
| 1014 | { |
| 1015 | return bits || !skip_empty ? |
| 1016 | snprintf(buf, buf_size, "%lx", bits) : 0; |
| 1017 | } |
| 1018 | |
| 1019 | #endif |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1020 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | #ifdef CONFIG_PROC_FS |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1022 | |
| 1023 | static struct proc_dir_entry *proc_bus_input_dir; |
| 1024 | static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait); |
| 1025 | static int input_devices_state; |
| 1026 | |
| 1027 | static inline void input_wakeup_procfs_readers(void) |
| 1028 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | input_devices_state++; |
| 1030 | wake_up(&input_devices_poll_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | } |
| 1032 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1033 | 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] | 1034 | { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1035 | poll_wait(file, &input_devices_poll_wait, wait); |
Dmitry Torokhov | fa88661 | 2009-03-04 00:52:20 -0800 | [diff] [blame] | 1036 | if (file->f_version != input_devices_state) { |
| 1037 | file->f_version = input_devices_state; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1038 | return POLLIN | POLLRDNORM; |
Dmitry Torokhov | fa88661 | 2009-03-04 00:52:20 -0800 | [diff] [blame] | 1039 | } |
Dmitry Torokhov | 1e0afb2 | 2006-06-26 01:48:47 -0400 | [diff] [blame] | 1040 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1041 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | } |
| 1043 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1044 | union input_seq_state { |
| 1045 | struct { |
| 1046 | unsigned short pos; |
| 1047 | bool mutex_acquired; |
| 1048 | }; |
| 1049 | void *p; |
| 1050 | }; |
| 1051 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1052 | static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos) |
| 1053 | { |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1054 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
| 1055 | int error; |
| 1056 | |
| 1057 | /* We need to fit into seq->private pointer */ |
| 1058 | BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private)); |
| 1059 | |
| 1060 | error = mutex_lock_interruptible(&input_mutex); |
| 1061 | if (error) { |
| 1062 | state->mutex_acquired = false; |
| 1063 | return ERR_PTR(error); |
| 1064 | } |
| 1065 | |
| 1066 | state->mutex_acquired = true; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1067 | |
Pavel Emelianov | ad5d972 | 2007-07-18 00:38:32 -0400 | [diff] [blame] | 1068 | return seq_list_start(&input_dev_list, *pos); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1069 | } |
| 1070 | |
| 1071 | static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1072 | { |
Pavel Emelianov | ad5d972 | 2007-07-18 00:38:32 -0400 | [diff] [blame] | 1073 | return seq_list_next(v, &input_dev_list, pos); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1074 | } |
| 1075 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1076 | static void input_seq_stop(struct seq_file *seq, void *v) |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1077 | { |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1078 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
| 1079 | |
| 1080 | if (state->mutex_acquired) |
| 1081 | mutex_unlock(&input_mutex); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1082 | } |
| 1083 | |
| 1084 | static void input_seq_print_bitmap(struct seq_file *seq, const char *name, |
| 1085 | unsigned long *bitmap, int max) |
| 1086 | { |
| 1087 | int i; |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1088 | bool skip_empty = true; |
| 1089 | char buf[18]; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1090 | |
| 1091 | seq_printf(seq, "B: %s=", name); |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1092 | |
| 1093 | for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) { |
| 1094 | if (input_bits_to_string(buf, sizeof(buf), |
| 1095 | bitmap[i], skip_empty)) { |
| 1096 | skip_empty = false; |
| 1097 | seq_printf(seq, "%s%s", buf, i > 0 ? " " : ""); |
| 1098 | } |
| 1099 | } |
| 1100 | |
| 1101 | /* |
| 1102 | * If no output was produced print a single 0. |
| 1103 | */ |
| 1104 | if (skip_empty) |
| 1105 | seq_puts(seq, "0"); |
| 1106 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1107 | seq_putc(seq, '\n'); |
| 1108 | } |
| 1109 | |
| 1110 | static int input_devices_seq_show(struct seq_file *seq, void *v) |
| 1111 | { |
| 1112 | struct input_dev *dev = container_of(v, struct input_dev, node); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1113 | const char *path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | struct input_handle *handle; |
| 1115 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1116 | seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n", |
| 1117 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1119 | seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); |
| 1120 | seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : ""); |
| 1121 | seq_printf(seq, "S: Sysfs=%s\n", path ? path : ""); |
Dmitry Torokhov | 15e03ae | 2007-03-07 23:20:17 -0500 | [diff] [blame] | 1122 | seq_printf(seq, "U: Uniq=%s\n", dev->uniq ? dev->uniq : ""); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1123 | seq_printf(seq, "H: Handlers="); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1125 | list_for_each_entry(handle, &dev->h_list, d_node) |
| 1126 | seq_printf(seq, "%s ", handle->name); |
| 1127 | seq_putc(seq, '\n'); |
Dmitry Torokhov | 051b2fe | 2005-09-15 02:01:54 -0500 | [diff] [blame] | 1128 | |
Henrik Rydberg | 85b7720 | 2010-12-18 20:51:13 +0100 | [diff] [blame] | 1129 | input_seq_print_bitmap(seq, "PROP", dev->propbit, INPUT_PROP_MAX); |
| 1130 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1131 | input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX); |
| 1132 | if (test_bit(EV_KEY, dev->evbit)) |
| 1133 | input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX); |
| 1134 | if (test_bit(EV_REL, dev->evbit)) |
| 1135 | input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX); |
| 1136 | if (test_bit(EV_ABS, dev->evbit)) |
| 1137 | input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX); |
| 1138 | if (test_bit(EV_MSC, dev->evbit)) |
| 1139 | input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX); |
| 1140 | if (test_bit(EV_LED, dev->evbit)) |
| 1141 | input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX); |
| 1142 | if (test_bit(EV_SND, dev->evbit)) |
| 1143 | input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX); |
| 1144 | if (test_bit(EV_FF, dev->evbit)) |
| 1145 | input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX); |
| 1146 | if (test_bit(EV_SW, dev->evbit)) |
| 1147 | input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1149 | seq_putc(seq, '\n'); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1151 | kfree(path); |
| 1152 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | } |
| 1154 | |
Jan Engelhardt | cec69c3 | 2008-01-31 00:43:32 -0500 | [diff] [blame] | 1155 | static const struct seq_operations input_devices_seq_ops = { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1156 | .start = input_devices_seq_start, |
| 1157 | .next = input_devices_seq_next, |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1158 | .stop = input_seq_stop, |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1159 | .show = input_devices_seq_show, |
| 1160 | }; |
| 1161 | |
| 1162 | static int input_proc_devices_open(struct inode *inode, struct file *file) |
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 | return seq_open(file, &input_devices_seq_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | } |
| 1166 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 1167 | static const struct file_operations input_devices_fileops = { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1168 | .owner = THIS_MODULE, |
| 1169 | .open = input_proc_devices_open, |
| 1170 | .poll = input_proc_devices_poll, |
| 1171 | .read = seq_read, |
| 1172 | .llseek = seq_lseek, |
| 1173 | .release = seq_release, |
| 1174 | }; |
| 1175 | |
| 1176 | static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos) |
| 1177 | { |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1178 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
| 1179 | int error; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1180 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1181 | /* We need to fit into seq->private pointer */ |
| 1182 | BUILD_BUG_ON(sizeof(union input_seq_state) != sizeof(seq->private)); |
| 1183 | |
| 1184 | error = mutex_lock_interruptible(&input_mutex); |
| 1185 | if (error) { |
| 1186 | state->mutex_acquired = false; |
| 1187 | return ERR_PTR(error); |
| 1188 | } |
| 1189 | |
| 1190 | state->mutex_acquired = true; |
| 1191 | state->pos = *pos; |
| 1192 | |
Pavel Emelianov | ad5d972 | 2007-07-18 00:38:32 -0400 | [diff] [blame] | 1193 | return seq_list_start(&input_handler_list, *pos); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1194 | } |
| 1195 | |
| 1196 | static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1197 | { |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1198 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1199 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1200 | state->pos = *pos + 1; |
| 1201 | return seq_list_next(v, &input_handler_list, pos); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1202 | } |
| 1203 | |
| 1204 | static int input_handlers_seq_show(struct seq_file *seq, void *v) |
| 1205 | { |
| 1206 | struct input_handler *handler = container_of(v, struct input_handler, node); |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1207 | union input_seq_state *state = (union input_seq_state *)&seq->private; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1208 | |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1209 | seq_printf(seq, "N: Number=%u Name=%s", state->pos, handler->name); |
Dmitry Torokhov | ef7995f | 2010-01-29 23:59:12 -0800 | [diff] [blame] | 1210 | if (handler->filter) |
| 1211 | seq_puts(seq, " (filter)"); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1212 | if (handler->fops) |
| 1213 | seq_printf(seq, " Minor=%d", handler->minor); |
| 1214 | seq_putc(seq, '\n'); |
| 1215 | |
| 1216 | return 0; |
| 1217 | } |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1218 | |
Jan Engelhardt | cec69c3 | 2008-01-31 00:43:32 -0500 | [diff] [blame] | 1219 | static const struct seq_operations input_handlers_seq_ops = { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1220 | .start = input_handlers_seq_start, |
| 1221 | .next = input_handlers_seq_next, |
Dmitry Torokhov | 1572ca2 | 2009-10-13 23:37:30 -0700 | [diff] [blame] | 1222 | .stop = input_seq_stop, |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1223 | .show = input_handlers_seq_show, |
| 1224 | }; |
| 1225 | |
| 1226 | static int input_proc_handlers_open(struct inode *inode, struct file *file) |
| 1227 | { |
| 1228 | return seq_open(file, &input_handlers_seq_ops); |
| 1229 | } |
| 1230 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 1231 | static const struct file_operations input_handlers_fileops = { |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1232 | .owner = THIS_MODULE, |
| 1233 | .open = input_proc_handlers_open, |
| 1234 | .read = seq_read, |
| 1235 | .llseek = seq_lseek, |
| 1236 | .release = seq_release, |
| 1237 | }; |
Luke Kosewski | e334016fc | 2005-06-01 02:39:28 -0500 | [diff] [blame] | 1238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | static int __init input_proc_init(void) |
| 1240 | { |
| 1241 | struct proc_dir_entry *entry; |
| 1242 | |
Alexey Dobriyan | 9c37066 | 2008-04-29 01:01:41 -0700 | [diff] [blame] | 1243 | proc_bus_input_dir = proc_mkdir("bus/input", NULL); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1244 | if (!proc_bus_input_dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | return -ENOMEM; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1246 | |
Denis V. Lunev | c7705f3 | 2008-04-29 01:02:35 -0700 | [diff] [blame] | 1247 | entry = proc_create("devices", 0, proc_bus_input_dir, |
| 1248 | &input_devices_fileops); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1249 | if (!entry) |
| 1250 | goto fail1; |
| 1251 | |
Denis V. Lunev | c7705f3 | 2008-04-29 01:02:35 -0700 | [diff] [blame] | 1252 | entry = proc_create("handlers", 0, proc_bus_input_dir, |
| 1253 | &input_handlers_fileops); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1254 | if (!entry) |
| 1255 | goto fail2; |
| 1256 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | return 0; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1258 | |
| 1259 | fail2: remove_proc_entry("devices", proc_bus_input_dir); |
Alexey Dobriyan | 9c37066 | 2008-04-29 01:01:41 -0700 | [diff] [blame] | 1260 | fail1: remove_proc_entry("bus/input", NULL); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1261 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1263 | |
Andrew Morton | beffbdc | 2005-07-01 23:54:30 -0500 | [diff] [blame] | 1264 | static void input_proc_exit(void) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1265 | { |
| 1266 | remove_proc_entry("devices", proc_bus_input_dir); |
| 1267 | remove_proc_entry("handlers", proc_bus_input_dir); |
Alexey Dobriyan | 9c37066 | 2008-04-29 01:01:41 -0700 | [diff] [blame] | 1268 | remove_proc_entry("bus/input", NULL); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1269 | } |
| 1270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | #else /* !CONFIG_PROC_FS */ |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1272 | static inline void input_wakeup_procfs_readers(void) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | static inline int input_proc_init(void) { return 0; } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1274 | static inline void input_proc_exit(void) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | #endif |
| 1276 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1277 | #define INPUT_DEV_STRING_ATTR_SHOW(name) \ |
| 1278 | static ssize_t input_dev_show_##name(struct device *dev, \ |
| 1279 | struct device_attribute *attr, \ |
| 1280 | char *buf) \ |
| 1281 | { \ |
| 1282 | struct input_dev *input_dev = to_input_dev(dev); \ |
| 1283 | \ |
| 1284 | return scnprintf(buf, PAGE_SIZE, "%s\n", \ |
| 1285 | input_dev->name ? input_dev->name : ""); \ |
| 1286 | } \ |
| 1287 | static DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL) |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1288 | |
| 1289 | INPUT_DEV_STRING_ATTR_SHOW(name); |
| 1290 | INPUT_DEV_STRING_ATTR_SHOW(phys); |
| 1291 | INPUT_DEV_STRING_ATTR_SHOW(uniq); |
| 1292 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1293 | static int input_print_modalias_bits(char *buf, int size, |
| 1294 | char name, unsigned long *bm, |
| 1295 | unsigned int min_bit, unsigned int max_bit) |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1296 | { |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1297 | int len = 0, i; |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1298 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1299 | len += snprintf(buf, max(size, 0), "%c", name); |
| 1300 | for (i = min_bit; i < max_bit; i++) |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 1301 | if (bm[BIT_WORD(i)] & BIT_MASK(i)) |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1302 | len += snprintf(buf + len, max(size - len, 0), "%X,", i); |
Kay Sievers | bd37e5a | 2006-01-05 13:19:55 +0100 | [diff] [blame] | 1303 | return len; |
| 1304 | } |
| 1305 | |
Dmitry Torokhov | 2db6687 | 2006-04-02 00:09:26 -0500 | [diff] [blame] | 1306 | static int input_print_modalias(char *buf, int size, struct input_dev *id, |
| 1307 | int add_cr) |
Kay Sievers | bd37e5a | 2006-01-05 13:19:55 +0100 | [diff] [blame] | 1308 | { |
| 1309 | int len; |
| 1310 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1311 | len = snprintf(buf, max(size, 0), |
| 1312 | "input:b%04Xv%04Xp%04Xe%04X-", |
| 1313 | id->id.bustype, id->id.vendor, |
| 1314 | id->id.product, id->id.version); |
Kay Sievers | bd37e5a | 2006-01-05 13:19:55 +0100 | [diff] [blame] | 1315 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1316 | len += input_print_modalias_bits(buf + len, size - len, |
| 1317 | 'e', id->evbit, 0, EV_MAX); |
| 1318 | len += input_print_modalias_bits(buf + len, size - len, |
| 1319 | 'k', id->keybit, KEY_MIN_INTERESTING, KEY_MAX); |
| 1320 | len += input_print_modalias_bits(buf + len, size - len, |
| 1321 | 'r', id->relbit, 0, REL_MAX); |
| 1322 | len += input_print_modalias_bits(buf + len, size - len, |
| 1323 | 'a', id->absbit, 0, ABS_MAX); |
| 1324 | len += input_print_modalias_bits(buf + len, size - len, |
| 1325 | 'm', id->mscbit, 0, MSC_MAX); |
| 1326 | len += input_print_modalias_bits(buf + len, size - len, |
| 1327 | 'l', id->ledbit, 0, LED_MAX); |
| 1328 | len += input_print_modalias_bits(buf + len, size - len, |
| 1329 | 's', id->sndbit, 0, SND_MAX); |
| 1330 | len += input_print_modalias_bits(buf + len, size - len, |
| 1331 | 'f', id->ffbit, 0, FF_MAX); |
| 1332 | len += input_print_modalias_bits(buf + len, size - len, |
| 1333 | 'w', id->swbit, 0, SW_MAX); |
Dmitry Torokhov | 2db6687 | 2006-04-02 00:09:26 -0500 | [diff] [blame] | 1334 | |
| 1335 | if (add_cr) |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1336 | len += snprintf(buf + len, max(size - len, 0), "\n"); |
Dmitry Torokhov | 2db6687 | 2006-04-02 00:09:26 -0500 | [diff] [blame] | 1337 | |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1338 | return len; |
| 1339 | } |
| 1340 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1341 | static ssize_t input_dev_show_modalias(struct device *dev, |
| 1342 | struct device_attribute *attr, |
| 1343 | char *buf) |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1344 | { |
| 1345 | struct input_dev *id = to_input_dev(dev); |
Kay Sievers | bd37e5a | 2006-01-05 13:19:55 +0100 | [diff] [blame] | 1346 | ssize_t len; |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1347 | |
Dmitry Torokhov | 2db6687 | 2006-04-02 00:09:26 -0500 | [diff] [blame] | 1348 | len = input_print_modalias(buf, PAGE_SIZE, id, 1); |
| 1349 | |
Richard Purdie | 8a3cf45 | 2006-06-26 01:48:21 -0400 | [diff] [blame] | 1350 | return min_t(int, len, PAGE_SIZE); |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1351 | } |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1352 | static DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL); |
Rusty Russell | 1d8f430 | 2005-12-07 21:40:34 +0100 | [diff] [blame] | 1353 | |
Henrik Rydberg | 85b7720 | 2010-12-18 20:51:13 +0100 | [diff] [blame] | 1354 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, |
| 1355 | int max, int add_cr); |
| 1356 | |
| 1357 | static ssize_t input_dev_show_properties(struct device *dev, |
| 1358 | struct device_attribute *attr, |
| 1359 | char *buf) |
| 1360 | { |
| 1361 | struct input_dev *input_dev = to_input_dev(dev); |
| 1362 | int len = input_print_bitmap(buf, PAGE_SIZE, input_dev->propbit, |
| 1363 | INPUT_PROP_MAX, true); |
| 1364 | return min_t(int, len, PAGE_SIZE); |
| 1365 | } |
| 1366 | static DEVICE_ATTR(properties, S_IRUGO, input_dev_show_properties, NULL); |
| 1367 | |
Greg Kroah-Hartman | 629b77a | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1368 | static struct attribute *input_dev_attrs[] = { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1369 | &dev_attr_name.attr, |
| 1370 | &dev_attr_phys.attr, |
| 1371 | &dev_attr_uniq.attr, |
| 1372 | &dev_attr_modalias.attr, |
Henrik Rydberg | 85b7720 | 2010-12-18 20:51:13 +0100 | [diff] [blame] | 1373 | &dev_attr_properties.attr, |
Greg Kroah-Hartman | 629b77a | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1374 | NULL |
| 1375 | }; |
| 1376 | |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 1377 | static struct attribute_group input_dev_attr_group = { |
Greg Kroah-Hartman | 629b77a | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1378 | .attrs = input_dev_attrs, |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1379 | }; |
| 1380 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1381 | #define INPUT_DEV_ID_ATTR(name) \ |
| 1382 | static ssize_t input_dev_show_id_##name(struct device *dev, \ |
| 1383 | struct device_attribute *attr, \ |
| 1384 | char *buf) \ |
| 1385 | { \ |
| 1386 | struct input_dev *input_dev = to_input_dev(dev); \ |
| 1387 | return scnprintf(buf, PAGE_SIZE, "%04x\n", input_dev->id.name); \ |
| 1388 | } \ |
| 1389 | static DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL) |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1390 | |
| 1391 | INPUT_DEV_ID_ATTR(bustype); |
| 1392 | INPUT_DEV_ID_ATTR(vendor); |
| 1393 | INPUT_DEV_ID_ATTR(product); |
| 1394 | INPUT_DEV_ID_ATTR(version); |
| 1395 | |
| 1396 | static struct attribute *input_dev_id_attrs[] = { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1397 | &dev_attr_bustype.attr, |
| 1398 | &dev_attr_vendor.attr, |
| 1399 | &dev_attr_product.attr, |
| 1400 | &dev_attr_version.attr, |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1401 | NULL |
| 1402 | }; |
| 1403 | |
| 1404 | static struct attribute_group input_dev_id_attr_group = { |
| 1405 | .name = "id", |
| 1406 | .attrs = input_dev_id_attrs, |
| 1407 | }; |
| 1408 | |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1409 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, |
| 1410 | int max, int add_cr) |
| 1411 | { |
| 1412 | int i; |
| 1413 | int len = 0; |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1414 | bool skip_empty = true; |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1415 | |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1416 | for (i = BITS_TO_LONGS(max) - 1; i >= 0; i--) { |
| 1417 | len += input_bits_to_string(buf + len, max(buf_size - len, 0), |
| 1418 | bitmap[i], skip_empty); |
| 1419 | if (len) { |
| 1420 | skip_empty = false; |
| 1421 | if (i > 0) |
| 1422 | len += snprintf(buf + len, max(buf_size - len, 0), " "); |
| 1423 | } |
| 1424 | } |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1425 | |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1426 | /* |
| 1427 | * If no output was produced print a single 0. |
| 1428 | */ |
| 1429 | if (len == 0) |
| 1430 | len = snprintf(buf, buf_size, "%d", 0); |
Dmitry Torokhov | 969b21c | 2006-04-02 00:09:34 -0500 | [diff] [blame] | 1431 | |
| 1432 | if (add_cr) |
| 1433 | len += snprintf(buf + len, max(buf_size - len, 0), "\n"); |
| 1434 | |
| 1435 | return len; |
| 1436 | } |
| 1437 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1438 | #define INPUT_DEV_CAP_ATTR(ev, bm) \ |
| 1439 | static ssize_t input_dev_show_cap_##bm(struct device *dev, \ |
| 1440 | struct device_attribute *attr, \ |
| 1441 | char *buf) \ |
| 1442 | { \ |
| 1443 | struct input_dev *input_dev = to_input_dev(dev); \ |
| 1444 | int len = input_print_bitmap(buf, PAGE_SIZE, \ |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1445 | input_dev->bm##bit, ev##_MAX, \ |
| 1446 | true); \ |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1447 | return min_t(int, len, PAGE_SIZE); \ |
| 1448 | } \ |
| 1449 | static DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL) |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1450 | |
| 1451 | INPUT_DEV_CAP_ATTR(EV, ev); |
| 1452 | INPUT_DEV_CAP_ATTR(KEY, key); |
| 1453 | INPUT_DEV_CAP_ATTR(REL, rel); |
| 1454 | INPUT_DEV_CAP_ATTR(ABS, abs); |
| 1455 | INPUT_DEV_CAP_ATTR(MSC, msc); |
| 1456 | INPUT_DEV_CAP_ATTR(LED, led); |
| 1457 | INPUT_DEV_CAP_ATTR(SND, snd); |
| 1458 | INPUT_DEV_CAP_ATTR(FF, ff); |
| 1459 | INPUT_DEV_CAP_ATTR(SW, sw); |
| 1460 | |
| 1461 | static struct attribute *input_dev_caps_attrs[] = { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1462 | &dev_attr_ev.attr, |
| 1463 | &dev_attr_key.attr, |
| 1464 | &dev_attr_rel.attr, |
| 1465 | &dev_attr_abs.attr, |
| 1466 | &dev_attr_msc.attr, |
| 1467 | &dev_attr_led.attr, |
| 1468 | &dev_attr_snd.attr, |
| 1469 | &dev_attr_ff.attr, |
| 1470 | &dev_attr_sw.attr, |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 1471 | NULL |
| 1472 | }; |
| 1473 | |
| 1474 | static struct attribute_group input_dev_caps_attr_group = { |
| 1475 | .name = "capabilities", |
| 1476 | .attrs = input_dev_caps_attrs, |
| 1477 | }; |
| 1478 | |
David Brownell | a4dbd67 | 2009-06-24 10:06:31 -0700 | [diff] [blame] | 1479 | static const struct attribute_group *input_dev_attr_groups[] = { |
Dmitry Torokhov | cb9def4 | 2007-03-07 23:20:26 -0500 | [diff] [blame] | 1480 | &input_dev_attr_group, |
| 1481 | &input_dev_id_attr_group, |
| 1482 | &input_dev_caps_attr_group, |
| 1483 | NULL |
| 1484 | }; |
| 1485 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1486 | static void input_dev_release(struct device *device) |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1487 | { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1488 | struct input_dev *dev = to_input_dev(device); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1489 | |
Anssi Hannula | 509ca1a | 2006-07-19 01:40:22 -0400 | [diff] [blame] | 1490 | input_ff_destroy(dev); |
Henrik Rydberg | 40d007e | 2010-07-15 23:10:10 -0700 | [diff] [blame] | 1491 | input_mt_destroy_slots(dev); |
Daniel Mack | d31b286 | 2010-08-02 20:18:21 -0700 | [diff] [blame] | 1492 | kfree(dev->absinfo); |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 1493 | kfree(dev->vals); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1494 | kfree(dev); |
Anssi Hannula | 509ca1a | 2006-07-19 01:40:22 -0400 | [diff] [blame] | 1495 | |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1496 | module_put(THIS_MODULE); |
| 1497 | } |
| 1498 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1499 | /* |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 1500 | * Input uevent interface - loading event handlers based on |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1501 | * device bitfields. |
| 1502 | */ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1503 | static int input_add_uevent_bm_var(struct kobj_uevent_env *env, |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1504 | const char *name, unsigned long *bitmap, int max) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1505 | { |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1506 | int len; |
| 1507 | |
Henrik Rydberg | fcd3027 | 2010-12-18 20:28:26 +0100 | [diff] [blame] | 1508 | if (add_uevent_var(env, "%s", name)) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1509 | return -ENOMEM; |
| 1510 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1511 | len = input_print_bitmap(&env->buf[env->buflen - 1], |
| 1512 | sizeof(env->buf) - env->buflen, |
Dmitry Torokhov | 15e184a | 2010-01-11 00:05:43 -0800 | [diff] [blame] | 1513 | bitmap, max, false); |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1514 | if (len >= (sizeof(env->buf) - env->buflen)) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1515 | return -ENOMEM; |
| 1516 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1517 | env->buflen += len; |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1518 | return 0; |
| 1519 | } |
| 1520 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1521 | static int input_add_uevent_modalias_var(struct kobj_uevent_env *env, |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1522 | struct input_dev *dev) |
| 1523 | { |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1524 | int len; |
| 1525 | |
| 1526 | if (add_uevent_var(env, "MODALIAS=")) |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1527 | return -ENOMEM; |
| 1528 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1529 | len = input_print_modalias(&env->buf[env->buflen - 1], |
| 1530 | sizeof(env->buf) - env->buflen, |
| 1531 | dev, 0); |
| 1532 | if (len >= (sizeof(env->buf) - env->buflen)) |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1533 | return -ENOMEM; |
| 1534 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1535 | env->buflen += len; |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1536 | return 0; |
| 1537 | } |
| 1538 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1539 | #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \ |
| 1540 | do { \ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1541 | int err = add_uevent_var(env, fmt, val); \ |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1542 | if (err) \ |
| 1543 | return err; \ |
| 1544 | } while (0) |
| 1545 | |
| 1546 | #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \ |
| 1547 | do { \ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1548 | int err = input_add_uevent_bm_var(env, name, bm, max); \ |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1549 | if (err) \ |
| 1550 | return err; \ |
| 1551 | } while (0) |
| 1552 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1553 | #define INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev) \ |
| 1554 | do { \ |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1555 | int err = input_add_uevent_modalias_var(env, dev); \ |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1556 | if (err) \ |
| 1557 | return err; \ |
| 1558 | } while (0) |
| 1559 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 1560 | 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] | 1561 | { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1562 | struct input_dev *dev = to_input_dev(device); |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1563 | |
| 1564 | INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x", |
| 1565 | dev->id.bustype, dev->id.vendor, |
| 1566 | dev->id.product, dev->id.version); |
| 1567 | if (dev->name) |
| 1568 | INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); |
| 1569 | if (dev->phys) |
| 1570 | INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); |
Dmitry Torokhov | 08de1f0 | 2005-11-08 21:34:29 -0800 | [diff] [blame] | 1571 | if (dev->uniq) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1572 | INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); |
| 1573 | |
Henrik Rydberg | 85b7720 | 2010-12-18 20:51:13 +0100 | [diff] [blame] | 1574 | INPUT_ADD_HOTPLUG_BM_VAR("PROP=", dev->propbit, INPUT_PROP_MAX); |
| 1575 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1576 | INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); |
| 1577 | if (test_bit(EV_KEY, dev->evbit)) |
| 1578 | INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); |
| 1579 | if (test_bit(EV_REL, dev->evbit)) |
| 1580 | INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); |
| 1581 | if (test_bit(EV_ABS, dev->evbit)) |
| 1582 | INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); |
| 1583 | if (test_bit(EV_MSC, dev->evbit)) |
| 1584 | INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); |
| 1585 | if (test_bit(EV_LED, dev->evbit)) |
| 1586 | INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); |
| 1587 | if (test_bit(EV_SND, dev->evbit)) |
| 1588 | INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); |
| 1589 | if (test_bit(EV_FF, dev->evbit)) |
| 1590 | INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); |
| 1591 | if (test_bit(EV_SW, dev->evbit)) |
| 1592 | INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); |
| 1593 | |
Dmitry Torokhov | ac648a6 | 2006-04-02 00:09:51 -0500 | [diff] [blame] | 1594 | INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev); |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 1595 | |
| 1596 | return 0; |
| 1597 | } |
| 1598 | |
Dmitry Torokhov | 3cc9635 | 2009-11-12 23:19:05 -0800 | [diff] [blame] | 1599 | #define INPUT_DO_TOGGLE(dev, type, bits, on) \ |
| 1600 | do { \ |
| 1601 | int i; \ |
| 1602 | bool active; \ |
| 1603 | \ |
| 1604 | if (!test_bit(EV_##type, dev->evbit)) \ |
| 1605 | break; \ |
| 1606 | \ |
| 1607 | for (i = 0; i < type##_MAX; i++) { \ |
| 1608 | if (!test_bit(i, dev->bits##bit)) \ |
| 1609 | continue; \ |
| 1610 | \ |
| 1611 | active = test_bit(i, dev->bits); \ |
| 1612 | if (!active && !on) \ |
| 1613 | continue; \ |
| 1614 | \ |
| 1615 | dev->event(dev, EV_##type, i, on ? active : 0); \ |
| 1616 | } \ |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1617 | } while (0) |
| 1618 | |
Dmitry Torokhov | b50b521 | 2010-11-03 11:02:31 -0700 | [diff] [blame] | 1619 | static void input_dev_toggle(struct input_dev *dev, bool activate) |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1620 | { |
| 1621 | if (!dev->event) |
| 1622 | return; |
| 1623 | |
| 1624 | INPUT_DO_TOGGLE(dev, LED, led, activate); |
| 1625 | INPUT_DO_TOGGLE(dev, SND, snd, activate); |
| 1626 | |
| 1627 | if (activate && test_bit(EV_REP, dev->evbit)) { |
| 1628 | dev->event(dev, EV_REP, REP_PERIOD, dev->rep[REP_PERIOD]); |
| 1629 | dev->event(dev, EV_REP, REP_DELAY, dev->rep[REP_DELAY]); |
| 1630 | } |
| 1631 | } |
| 1632 | |
Dmitry Torokhov | b50b521 | 2010-11-03 11:02:31 -0700 | [diff] [blame] | 1633 | /** |
| 1634 | * input_reset_device() - reset/restore the state of input device |
| 1635 | * @dev: input device whose state needs to be reset |
| 1636 | * |
| 1637 | * This function tries to reset the state of an opened input device and |
| 1638 | * bring internal state and state if the hardware in sync with each other. |
| 1639 | * We mark all keys as released, restore LED state, repeat rate, etc. |
| 1640 | */ |
| 1641 | void input_reset_device(struct input_dev *dev) |
| 1642 | { |
| 1643 | mutex_lock(&dev->mutex); |
| 1644 | |
| 1645 | if (dev->users) { |
| 1646 | input_dev_toggle(dev, true); |
| 1647 | |
| 1648 | /* |
| 1649 | * Keys that have been pressed at suspend time are unlikely |
| 1650 | * to be still pressed when we resume. |
| 1651 | */ |
| 1652 | spin_lock_irq(&dev->event_lock); |
| 1653 | input_dev_release_keys(dev); |
| 1654 | spin_unlock_irq(&dev->event_lock); |
| 1655 | } |
| 1656 | |
| 1657 | mutex_unlock(&dev->mutex); |
| 1658 | } |
| 1659 | EXPORT_SYMBOL(input_reset_device); |
| 1660 | |
| 1661 | #ifdef CONFIG_PM |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1662 | static int input_dev_suspend(struct device *dev) |
| 1663 | { |
| 1664 | struct input_dev *input_dev = to_input_dev(dev); |
| 1665 | |
| 1666 | mutex_lock(&input_dev->mutex); |
Dmitry Torokhov | b50b521 | 2010-11-03 11:02:31 -0700 | [diff] [blame] | 1667 | |
| 1668 | if (input_dev->users) |
| 1669 | input_dev_toggle(input_dev, false); |
| 1670 | |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1671 | mutex_unlock(&input_dev->mutex); |
| 1672 | |
| 1673 | return 0; |
| 1674 | } |
| 1675 | |
| 1676 | static int input_dev_resume(struct device *dev) |
| 1677 | { |
| 1678 | struct input_dev *input_dev = to_input_dev(dev); |
| 1679 | |
Dmitry Torokhov | b50b521 | 2010-11-03 11:02:31 -0700 | [diff] [blame] | 1680 | input_reset_device(input_dev); |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1681 | |
| 1682 | return 0; |
| 1683 | } |
| 1684 | |
| 1685 | static const struct dev_pm_ops input_dev_pm_ops = { |
| 1686 | .suspend = input_dev_suspend, |
| 1687 | .resume = input_dev_resume, |
| 1688 | .poweroff = input_dev_suspend, |
| 1689 | .restore = input_dev_resume, |
| 1690 | }; |
| 1691 | #endif /* CONFIG_PM */ |
| 1692 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1693 | static struct device_type input_dev_type = { |
| 1694 | .groups = input_dev_attr_groups, |
| 1695 | .release = input_dev_release, |
| 1696 | .uevent = input_dev_uevent, |
Dmitry Torokhov | ffd0db9 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 1697 | #ifdef CONFIG_PM |
| 1698 | .pm = &input_dev_pm_ops, |
| 1699 | #endif |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1700 | }; |
| 1701 | |
Al Viro | 2c9ede5 | 2011-07-23 20:24:48 -0400 | [diff] [blame] | 1702 | static char *input_devnode(struct device *dev, umode_t *mode) |
Kay Sievers | aa5ed63 | 2009-04-30 15:23:42 +0200 | [diff] [blame] | 1703 | { |
| 1704 | return kasprintf(GFP_KERNEL, "input/%s", dev_name(dev)); |
| 1705 | } |
| 1706 | |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1707 | struct class input_class = { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1708 | .name = "input", |
Kay Sievers | e454cea | 2009-09-18 23:01:12 +0200 | [diff] [blame] | 1709 | .devnode = input_devnode, |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1710 | }; |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1711 | EXPORT_SYMBOL_GPL(input_class); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1712 | |
Dmitry Torokhov | 1447190 | 2006-11-02 23:26:55 -0500 | [diff] [blame] | 1713 | /** |
| 1714 | * input_allocate_device - allocate memory for new input device |
| 1715 | * |
| 1716 | * Returns prepared struct input_dev or NULL. |
| 1717 | * |
| 1718 | * NOTE: Use input_free_device() to free devices that have not been |
| 1719 | * registered; input_unregister_device() should be used for already |
| 1720 | * registered devices. |
| 1721 | */ |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1722 | struct input_dev *input_allocate_device(void) |
| 1723 | { |
| 1724 | struct input_dev *dev; |
| 1725 | |
| 1726 | dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL); |
| 1727 | if (dev) { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1728 | dev->dev.type = &input_dev_type; |
| 1729 | dev->dev.class = &input_class; |
| 1730 | device_initialize(&dev->dev); |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1731 | mutex_init(&dev->mutex); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1732 | spin_lock_init(&dev->event_lock); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1733 | INIT_LIST_HEAD(&dev->h_list); |
| 1734 | INIT_LIST_HEAD(&dev->node); |
Dmitry Torokhov | 655816e | 2006-09-14 01:32:14 -0400 | [diff] [blame] | 1735 | |
| 1736 | __module_get(THIS_MODULE); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1737 | } |
| 1738 | |
| 1739 | return dev; |
| 1740 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1741 | EXPORT_SYMBOL(input_allocate_device); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 1742 | |
Dmitry Torokhov | 1447190 | 2006-11-02 23:26:55 -0500 | [diff] [blame] | 1743 | /** |
| 1744 | * input_free_device - free memory occupied by input_dev structure |
| 1745 | * @dev: input device to free |
| 1746 | * |
| 1747 | * This function should only be used if input_register_device() |
| 1748 | * was not called yet or if it failed. Once device was registered |
| 1749 | * use input_unregister_device() and memory will be freed once last |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1750 | * reference to the device is dropped. |
Dmitry Torokhov | 1447190 | 2006-11-02 23:26:55 -0500 | [diff] [blame] | 1751 | * |
| 1752 | * Device should be allocated by input_allocate_device(). |
| 1753 | * |
| 1754 | * NOTE: If there are references to the input device then memory |
| 1755 | * will not be freed until last reference is dropped. |
| 1756 | */ |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1757 | void input_free_device(struct input_dev *dev) |
| 1758 | { |
Dmitry Torokhov | 54f9e36 | 2007-03-16 00:57:25 -0400 | [diff] [blame] | 1759 | if (dev) |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1760 | input_put_device(dev); |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1761 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1762 | EXPORT_SYMBOL(input_free_device); |
Dmitry Torokhov | f60d2b1 | 2006-06-26 01:48:36 -0400 | [diff] [blame] | 1763 | |
Dmitry Torokhov | 534565f | 2007-04-25 00:53:18 -0400 | [diff] [blame] | 1764 | /** |
| 1765 | * input_set_capability - mark device as capable of a certain event |
| 1766 | * @dev: device that is capable of emitting or accepting event |
| 1767 | * @type: type of the event (EV_KEY, EV_REL, etc...) |
| 1768 | * @code: event code |
| 1769 | * |
| 1770 | * In addition to setting up corresponding bit in appropriate capability |
| 1771 | * bitmap the function also adjusts dev->evbit. |
| 1772 | */ |
| 1773 | void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code) |
| 1774 | { |
| 1775 | switch (type) { |
| 1776 | case EV_KEY: |
| 1777 | __set_bit(code, dev->keybit); |
| 1778 | break; |
| 1779 | |
| 1780 | case EV_REL: |
| 1781 | __set_bit(code, dev->relbit); |
| 1782 | break; |
| 1783 | |
| 1784 | case EV_ABS: |
| 1785 | __set_bit(code, dev->absbit); |
| 1786 | break; |
| 1787 | |
| 1788 | case EV_MSC: |
| 1789 | __set_bit(code, dev->mscbit); |
| 1790 | break; |
| 1791 | |
| 1792 | case EV_SW: |
| 1793 | __set_bit(code, dev->swbit); |
| 1794 | break; |
| 1795 | |
| 1796 | case EV_LED: |
| 1797 | __set_bit(code, dev->ledbit); |
| 1798 | break; |
| 1799 | |
| 1800 | case EV_SND: |
| 1801 | __set_bit(code, dev->sndbit); |
| 1802 | break; |
| 1803 | |
| 1804 | case EV_FF: |
| 1805 | __set_bit(code, dev->ffbit); |
| 1806 | break; |
| 1807 | |
Dmitry Baryshkov | 22d1c39 | 2007-12-14 01:21:03 -0500 | [diff] [blame] | 1808 | case EV_PWR: |
| 1809 | /* do nothing */ |
| 1810 | break; |
| 1811 | |
Dmitry Torokhov | 534565f | 2007-04-25 00:53:18 -0400 | [diff] [blame] | 1812 | default: |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 1813 | pr_err("input_set_capability: unknown type %u (code %u)\n", |
| 1814 | type, code); |
Dmitry Torokhov | 534565f | 2007-04-25 00:53:18 -0400 | [diff] [blame] | 1815 | dump_stack(); |
| 1816 | return; |
| 1817 | } |
| 1818 | |
| 1819 | __set_bit(type, dev->evbit); |
| 1820 | } |
| 1821 | EXPORT_SYMBOL(input_set_capability); |
| 1822 | |
Jeff Brown | 80b4895 | 2011-04-18 10:08:02 -0700 | [diff] [blame] | 1823 | static unsigned int input_estimate_events_per_packet(struct input_dev *dev) |
| 1824 | { |
| 1825 | int mt_slots; |
| 1826 | int i; |
| 1827 | unsigned int events; |
| 1828 | |
Henrik Rydberg | 8d18fba | 2012-09-15 15:15:58 +0200 | [diff] [blame] | 1829 | if (dev->mt) { |
| 1830 | mt_slots = dev->mt->num_slots; |
Jeff Brown | 80b4895 | 2011-04-18 10:08:02 -0700 | [diff] [blame] | 1831 | } else if (test_bit(ABS_MT_TRACKING_ID, dev->absbit)) { |
| 1832 | mt_slots = dev->absinfo[ABS_MT_TRACKING_ID].maximum - |
| 1833 | dev->absinfo[ABS_MT_TRACKING_ID].minimum + 1, |
Hans Petter Selasky | 8c127f0 | 2011-05-25 09:24:32 -0700 | [diff] [blame] | 1834 | mt_slots = clamp(mt_slots, 2, 32); |
Jeff Brown | 80b4895 | 2011-04-18 10:08:02 -0700 | [diff] [blame] | 1835 | } else if (test_bit(ABS_MT_POSITION_X, dev->absbit)) { |
| 1836 | mt_slots = 2; |
| 1837 | } else { |
| 1838 | mt_slots = 0; |
| 1839 | } |
| 1840 | |
| 1841 | events = mt_slots + 1; /* count SYN_MT_REPORT and SYN_REPORT */ |
| 1842 | |
| 1843 | for (i = 0; i < ABS_CNT; i++) { |
| 1844 | if (test_bit(i, dev->absbit)) { |
| 1845 | if (input_is_mt_axis(i)) |
| 1846 | events += mt_slots; |
| 1847 | else |
| 1848 | events++; |
| 1849 | } |
| 1850 | } |
| 1851 | |
| 1852 | for (i = 0; i < REL_CNT; i++) |
| 1853 | if (test_bit(i, dev->relbit)) |
| 1854 | events++; |
| 1855 | |
Henrik Rydberg | 7c75bf9 | 2012-09-01 16:15:43 +0200 | [diff] [blame] | 1856 | /* Make room for KEY and MSC events */ |
| 1857 | events += 7; |
| 1858 | |
Jeff Brown | 80b4895 | 2011-04-18 10:08:02 -0700 | [diff] [blame] | 1859 | return events; |
| 1860 | } |
| 1861 | |
Dmitry Torokhov | 92a3a58 | 2010-01-05 17:56:01 -0800 | [diff] [blame] | 1862 | #define INPUT_CLEANSE_BITMASK(dev, type, bits) \ |
| 1863 | do { \ |
| 1864 | if (!test_bit(EV_##type, dev->evbit)) \ |
| 1865 | memset(dev->bits##bit, 0, \ |
| 1866 | sizeof(dev->bits##bit)); \ |
| 1867 | } while (0) |
| 1868 | |
| 1869 | static void input_cleanse_bitmasks(struct input_dev *dev) |
| 1870 | { |
| 1871 | INPUT_CLEANSE_BITMASK(dev, KEY, key); |
| 1872 | INPUT_CLEANSE_BITMASK(dev, REL, rel); |
| 1873 | INPUT_CLEANSE_BITMASK(dev, ABS, abs); |
| 1874 | INPUT_CLEANSE_BITMASK(dev, MSC, msc); |
| 1875 | INPUT_CLEANSE_BITMASK(dev, LED, led); |
| 1876 | INPUT_CLEANSE_BITMASK(dev, SND, snd); |
| 1877 | INPUT_CLEANSE_BITMASK(dev, FF, ff); |
| 1878 | INPUT_CLEANSE_BITMASK(dev, SW, sw); |
| 1879 | } |
| 1880 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1881 | /** |
| 1882 | * input_register_device - register device with input core |
| 1883 | * @dev: device to be registered |
| 1884 | * |
| 1885 | * This function registers device with input core. The device must be |
| 1886 | * allocated with input_allocate_device() and all it's capabilities |
| 1887 | * set up before registering. |
| 1888 | * If function fails the device must be freed with input_free_device(). |
| 1889 | * Once device has been successfully registered it can be unregistered |
| 1890 | * with input_unregister_device(); input_free_device() should not be |
| 1891 | * called in this case. |
| 1892 | */ |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 1893 | int input_register_device(struct input_dev *dev) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1894 | { |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 1895 | static atomic_t input_no = ATOMIC_INIT(0); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1896 | struct input_handler *handler; |
Henrik Rydberg | 7c75bf9 | 2012-09-01 16:15:43 +0200 | [diff] [blame] | 1897 | unsigned int packet_size; |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 1898 | const char *path; |
| 1899 | int error; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1900 | |
Dmitry Torokhov | 4f93df4 | 2010-01-05 17:56:00 -0800 | [diff] [blame] | 1901 | /* Every input device generates EV_SYN/SYN_REPORT events. */ |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1902 | __set_bit(EV_SYN, dev->evbit); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1903 | |
Dmitry Torokhov | 4f93df4 | 2010-01-05 17:56:00 -0800 | [diff] [blame] | 1904 | /* KEY_RESERVED is not supposed to be transmitted to userspace. */ |
| 1905 | __clear_bit(KEY_RESERVED, dev->keybit); |
| 1906 | |
Dmitry Torokhov | 92a3a58 | 2010-01-05 17:56:01 -0800 | [diff] [blame] | 1907 | /* Make sure that bitmasks not mentioned in dev->evbit are clean. */ |
| 1908 | input_cleanse_bitmasks(dev); |
| 1909 | |
Henrik Rydberg | 7c75bf9 | 2012-09-01 16:15:43 +0200 | [diff] [blame] | 1910 | packet_size = input_estimate_events_per_packet(dev); |
| 1911 | if (dev->hint_events_per_packet < packet_size) |
| 1912 | dev->hint_events_per_packet = packet_size; |
Jeff Brown | 80b4895 | 2011-04-18 10:08:02 -0700 | [diff] [blame] | 1913 | |
Henrik Rydberg | 4369c64 | 2012-09-15 15:23:35 +0200 | [diff] [blame^] | 1914 | dev->max_vals = max(dev->hint_events_per_packet, packet_size) + 2; |
| 1915 | dev->vals = kcalloc(dev->max_vals, sizeof(*dev->vals), GFP_KERNEL); |
| 1916 | if (!dev->vals) |
| 1917 | return -ENOMEM; |
| 1918 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1919 | /* |
| 1920 | * If delay and period are pre-set by the driver, then autorepeating |
| 1921 | * is handled by the driver itself and we don't do it in input.c. |
| 1922 | */ |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1923 | init_timer(&dev->timer); |
| 1924 | if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) { |
| 1925 | dev->timer.data = (long) dev; |
| 1926 | dev->timer.function = input_repeat_key; |
| 1927 | dev->rep[REP_DELAY] = 250; |
| 1928 | dev->rep[REP_PERIOD] = 33; |
| 1929 | } |
| 1930 | |
Dmitry Torokhov | aebd636 | 2011-01-31 21:06:39 -0800 | [diff] [blame] | 1931 | if (!dev->getkeycode) |
| 1932 | dev->getkeycode = input_default_getkeycode; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 1933 | |
Dmitry Torokhov | aebd636 | 2011-01-31 21:06:39 -0800 | [diff] [blame] | 1934 | if (!dev->setkeycode) |
| 1935 | dev->setkeycode = input_default_setkeycode; |
Marvin Raaijmakers | c8e4c77 | 2007-03-14 22:50:42 -0400 | [diff] [blame] | 1936 | |
Kay Sievers | a6c2490 | 2008-10-30 00:07:50 -0400 | [diff] [blame] | 1937 | dev_set_name(&dev->dev, "input%ld", |
| 1938 | (unsigned long) atomic_inc_return(&input_no) - 1); |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 1939 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1940 | error = device_add(&dev->dev); |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 1941 | if (error) |
| 1942 | return error; |
| 1943 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1944 | path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 1945 | pr_info("%s as %s\n", |
| 1946 | dev->name ? dev->name : "Unspecified device", |
| 1947 | path ? path : "N/A"); |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 1948 | kfree(path); |
Greg Kroah-Hartman | 1020402 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 1949 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1950 | error = mutex_lock_interruptible(&input_mutex); |
| 1951 | if (error) { |
| 1952 | device_del(&dev->dev); |
| 1953 | return error; |
| 1954 | } |
| 1955 | |
| 1956 | list_add_tail(&dev->node, &input_dev_list); |
| 1957 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1958 | list_for_each_entry(handler, &input_handler_list, node) |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1959 | input_attach_handler(dev, handler); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1960 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1961 | input_wakeup_procfs_readers(); |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 1962 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1963 | mutex_unlock(&input_mutex); |
| 1964 | |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 1965 | return 0; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1966 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1967 | EXPORT_SYMBOL(input_register_device); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1968 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1969 | /** |
| 1970 | * input_unregister_device - unregister previously registered device |
| 1971 | * @dev: device to be unregistered |
| 1972 | * |
| 1973 | * This function unregisters an input device. Once device is unregistered |
| 1974 | * the caller should not try to access it as it may get freed at any moment. |
| 1975 | */ |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1976 | void input_unregister_device(struct input_dev *dev) |
| 1977 | { |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1978 | struct input_handle *handle, *next; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1979 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1980 | input_disconnect_device(dev); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1981 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1982 | mutex_lock(&input_mutex); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1983 | |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1984 | list_for_each_entry_safe(handle, next, &dev->h_list, d_node) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1985 | handle->handler->disconnect(handle); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 1986 | WARN_ON(!list_empty(&dev->h_list)); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1987 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1988 | del_timer_sync(&dev->timer); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1989 | list_del_init(&dev->node); |
| 1990 | |
| 1991 | input_wakeup_procfs_readers(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1992 | |
| 1993 | mutex_unlock(&input_mutex); |
| 1994 | |
| 1995 | device_unregister(&dev->dev); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1996 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 1997 | EXPORT_SYMBOL(input_unregister_device); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 1998 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 1999 | /** |
| 2000 | * input_register_handler - register a new input handler |
| 2001 | * @handler: handler to be registered |
| 2002 | * |
| 2003 | * This function registers a new input handler (interface) for input |
| 2004 | * devices in the system and attaches it to all input devices that |
| 2005 | * are compatible with the handler. |
| 2006 | */ |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 2007 | int input_register_handler(struct input_handler *handler) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2008 | { |
| 2009 | struct input_dev *dev; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2010 | int retval; |
| 2011 | |
| 2012 | retval = mutex_lock_interruptible(&input_mutex); |
| 2013 | if (retval) |
| 2014 | return retval; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2015 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2016 | INIT_LIST_HEAD(&handler->h_list); |
| 2017 | |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 2018 | if (handler->fops != NULL) { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2019 | if (input_table[handler->minor >> 5]) { |
| 2020 | retval = -EBUSY; |
| 2021 | goto out; |
| 2022 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2023 | input_table[handler->minor >> 5] = handler; |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 2024 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2025 | |
| 2026 | list_add_tail(&handler->node, &input_handler_list); |
| 2027 | |
| 2028 | list_for_each_entry(dev, &input_dev_list, node) |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2029 | input_attach_handler(dev, handler); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2030 | |
| 2031 | input_wakeup_procfs_readers(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2032 | |
| 2033 | out: |
| 2034 | mutex_unlock(&input_mutex); |
| 2035 | return retval; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2036 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 2037 | EXPORT_SYMBOL(input_register_handler); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2038 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2039 | /** |
| 2040 | * input_unregister_handler - unregisters an input handler |
| 2041 | * @handler: handler to be unregistered |
| 2042 | * |
| 2043 | * This function disconnects a handler from its input devices and |
| 2044 | * removes it from lists of known handlers. |
| 2045 | */ |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2046 | void input_unregister_handler(struct input_handler *handler) |
| 2047 | { |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2048 | struct input_handle *handle, *next; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2049 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2050 | mutex_lock(&input_mutex); |
| 2051 | |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2052 | list_for_each_entry_safe(handle, next, &handler->h_list, h_node) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2053 | handler->disconnect(handle); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2054 | WARN_ON(!list_empty(&handler->h_list)); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2055 | |
| 2056 | list_del_init(&handler->node); |
| 2057 | |
| 2058 | if (handler->fops != NULL) |
| 2059 | input_table[handler->minor >> 5] = NULL; |
| 2060 | |
| 2061 | input_wakeup_procfs_readers(); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2062 | |
| 2063 | mutex_unlock(&input_mutex); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2064 | } |
Dmitry Torokhov | ca56fe0 | 2006-06-26 01:49:21 -0400 | [diff] [blame] | 2065 | EXPORT_SYMBOL(input_unregister_handler); |
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 | /** |
Dmitry Torokhov | 66d2a59 | 2009-12-01 21:54:35 -0800 | [diff] [blame] | 2068 | * input_handler_for_each_handle - handle iterator |
| 2069 | * @handler: input handler to iterate |
| 2070 | * @data: data for the callback |
| 2071 | * @fn: function to be called for each handle |
| 2072 | * |
| 2073 | * Iterate over @bus's list of devices, and call @fn for each, passing |
| 2074 | * it @data and stop when @fn returns a non-zero value. The function is |
| 2075 | * using RCU to traverse the list and therefore may be usind in atonic |
| 2076 | * contexts. The @fn callback is invoked from RCU critical section and |
| 2077 | * thus must not sleep. |
| 2078 | */ |
| 2079 | int input_handler_for_each_handle(struct input_handler *handler, void *data, |
| 2080 | int (*fn)(struct input_handle *, void *)) |
| 2081 | { |
| 2082 | struct input_handle *handle; |
| 2083 | int retval = 0; |
| 2084 | |
| 2085 | rcu_read_lock(); |
| 2086 | |
| 2087 | list_for_each_entry_rcu(handle, &handler->h_list, h_node) { |
| 2088 | retval = fn(handle, data); |
| 2089 | if (retval) |
| 2090 | break; |
| 2091 | } |
| 2092 | |
| 2093 | rcu_read_unlock(); |
| 2094 | |
| 2095 | return retval; |
| 2096 | } |
| 2097 | EXPORT_SYMBOL(input_handler_for_each_handle); |
| 2098 | |
| 2099 | /** |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2100 | * input_register_handle - register a new input handle |
| 2101 | * @handle: handle to register |
| 2102 | * |
| 2103 | * This function puts a new input handle onto device's |
| 2104 | * and handler's lists so that events can flow through |
| 2105 | * it once it is opened using input_open_device(). |
| 2106 | * |
| 2107 | * This function is supposed to be called from handler's |
| 2108 | * connect() method. |
| 2109 | */ |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2110 | int input_register_handle(struct input_handle *handle) |
| 2111 | { |
| 2112 | struct input_handler *handler = handle->handler; |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2113 | struct input_dev *dev = handle->dev; |
| 2114 | int error; |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2115 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2116 | /* |
| 2117 | * We take dev->mutex here to prevent race with |
| 2118 | * input_release_device(). |
| 2119 | */ |
| 2120 | error = mutex_lock_interruptible(&dev->mutex); |
| 2121 | if (error) |
| 2122 | return error; |
Dmitry Torokhov | ef7995f | 2010-01-29 23:59:12 -0800 | [diff] [blame] | 2123 | |
| 2124 | /* |
| 2125 | * Filters go to the head of the list, normal handlers |
| 2126 | * to the tail. |
| 2127 | */ |
| 2128 | if (handler->filter) |
| 2129 | list_add_rcu(&handle->d_node, &dev->h_list); |
| 2130 | else |
| 2131 | list_add_tail_rcu(&handle->d_node, &dev->h_list); |
| 2132 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2133 | mutex_unlock(&dev->mutex); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2134 | |
| 2135 | /* |
| 2136 | * Since we are supposed to be called from ->connect() |
| 2137 | * which is mutually exclusive with ->disconnect() |
| 2138 | * we can't be racing with input_unregister_handle() |
| 2139 | * and so separate lock is not needed here. |
| 2140 | */ |
Dmitry Torokhov | 66d2a59 | 2009-12-01 21:54:35 -0800 | [diff] [blame] | 2141 | list_add_tail_rcu(&handle->h_node, &handler->h_list); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2142 | |
| 2143 | if (handler->start) |
| 2144 | handler->start(handle); |
| 2145 | |
| 2146 | return 0; |
| 2147 | } |
| 2148 | EXPORT_SYMBOL(input_register_handle); |
| 2149 | |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2150 | /** |
| 2151 | * input_unregister_handle - unregister an input handle |
| 2152 | * @handle: handle to unregister |
| 2153 | * |
| 2154 | * This function removes input handle from device's |
| 2155 | * and handler's lists. |
| 2156 | * |
| 2157 | * This function is supposed to be called from handler's |
| 2158 | * disconnect() method. |
| 2159 | */ |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2160 | void input_unregister_handle(struct input_handle *handle) |
| 2161 | { |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2162 | struct input_dev *dev = handle->dev; |
| 2163 | |
Dmitry Torokhov | 66d2a59 | 2009-12-01 21:54:35 -0800 | [diff] [blame] | 2164 | list_del_rcu(&handle->h_node); |
Dmitry Torokhov | 8006479 | 2007-08-30 00:22:11 -0400 | [diff] [blame] | 2165 | |
| 2166 | /* |
| 2167 | * Take dev->mutex to prevent race with input_release_device(). |
| 2168 | */ |
| 2169 | mutex_lock(&dev->mutex); |
| 2170 | list_del_rcu(&handle->d_node); |
| 2171 | mutex_unlock(&dev->mutex); |
Dmitry Torokhov | 66d2a59 | 2009-12-01 21:54:35 -0800 | [diff] [blame] | 2172 | |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 2173 | synchronize_rcu(); |
Dmitry Torokhov | 5b2a082 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 2174 | } |
| 2175 | EXPORT_SYMBOL(input_unregister_handle); |
| 2176 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2177 | static int input_open_file(struct inode *inode, struct file *file) |
| 2178 | { |
Jonathan Corbet | 2edbf85 | 2008-05-15 10:37:16 -0600 | [diff] [blame] | 2179 | struct input_handler *handler; |
Arjan van de Ven | 99ac48f | 2006-03-28 01:56:41 -0800 | [diff] [blame] | 2180 | const struct file_operations *old_fops, *new_fops = NULL; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2181 | int err; |
| 2182 | |
Arnd Bergmann | 2f2177c | 2010-03-09 20:38:48 -0800 | [diff] [blame] | 2183 | err = mutex_lock_interruptible(&input_mutex); |
| 2184 | if (err) |
| 2185 | return err; |
| 2186 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2187 | /* No load-on-demand here? */ |
Jonathan Corbet | 2edbf85 | 2008-05-15 10:37:16 -0600 | [diff] [blame] | 2188 | handler = input_table[iminor(inode) >> 5]; |
Arnd Bergmann | 2f2177c | 2010-03-09 20:38:48 -0800 | [diff] [blame] | 2189 | if (handler) |
| 2190 | new_fops = fops_get(handler->fops); |
| 2191 | |
| 2192 | mutex_unlock(&input_mutex); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2193 | |
| 2194 | /* |
| 2195 | * That's _really_ odd. Usually NULL ->open means "nothing special", |
| 2196 | * not "no device". Oh, well... |
| 2197 | */ |
Arnd Bergmann | 2f2177c | 2010-03-09 20:38:48 -0800 | [diff] [blame] | 2198 | if (!new_fops || !new_fops->open) { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2199 | fops_put(new_fops); |
Jonathan Corbet | 2edbf85 | 2008-05-15 10:37:16 -0600 | [diff] [blame] | 2200 | err = -ENODEV; |
| 2201 | goto out; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2202 | } |
Arnd Bergmann | 2f2177c | 2010-03-09 20:38:48 -0800 | [diff] [blame] | 2203 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2204 | old_fops = file->f_op; |
| 2205 | file->f_op = new_fops; |
| 2206 | |
| 2207 | err = new_fops->open(inode, file); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2208 | if (err) { |
| 2209 | fops_put(file->f_op); |
| 2210 | file->f_op = fops_get(old_fops); |
| 2211 | } |
| 2212 | fops_put(old_fops); |
Jonathan Corbet | 2edbf85 | 2008-05-15 10:37:16 -0600 | [diff] [blame] | 2213 | out: |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2214 | return err; |
| 2215 | } |
| 2216 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 2217 | static const struct file_operations input_fops = { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2218 | .owner = THIS_MODULE, |
| 2219 | .open = input_open_file, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 2220 | .llseek = noop_llseek, |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2221 | }; |
| 2222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | static int __init input_init(void) |
| 2224 | { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2225 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2227 | err = class_register(&input_class); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 2228 | if (err) { |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 2229 | pr_err("unable to register input_dev class\n"); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 2230 | return err; |
| 2231 | } |
| 2232 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2233 | err = input_proc_init(); |
| 2234 | if (err) |
Greg Kroah-Hartman | b0fdfeb | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2235 | goto fail1; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2236 | |
| 2237 | err = register_chrdev(INPUT_MAJOR, "input", &input_fops); |
| 2238 | if (err) { |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 2239 | pr_err("unable to register char major %d", INPUT_MAJOR); |
Greg Kroah-Hartman | b0fdfeb | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2240 | goto fail2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2241 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2242 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2243 | return 0; |
| 2244 | |
Greg Kroah-Hartman | b0fdfeb | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2245 | fail2: input_proc_exit(); |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2246 | fail1: class_unregister(&input_class); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2247 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2248 | } |
| 2249 | |
| 2250 | static void __exit input_exit(void) |
| 2251 | { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 2252 | input_proc_exit(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | unregister_chrdev(INPUT_MAJOR, "input"); |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 2254 | class_unregister(&input_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2255 | } |
| 2256 | |
| 2257 | subsys_initcall(input_init); |
| 2258 | module_exit(input_exit); |