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 | |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/sched.h> |
| 15 | #include <linux/smp_lock.h> |
| 16 | #include <linux/input.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/random.h> |
| 19 | #include <linux/major.h> |
| 20 | #include <linux/proc_fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/interrupt.h> |
| 22 | #include <linux/poll.h> |
| 23 | #include <linux/device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
| 25 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); |
| 26 | MODULE_DESCRIPTION("Input core"); |
| 27 | MODULE_LICENSE("GPL"); |
| 28 | |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 29 | EXPORT_SYMBOL(input_allocate_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | EXPORT_SYMBOL(input_register_device); |
| 31 | EXPORT_SYMBOL(input_unregister_device); |
| 32 | EXPORT_SYMBOL(input_register_handler); |
| 33 | EXPORT_SYMBOL(input_unregister_handler); |
| 34 | EXPORT_SYMBOL(input_grab_device); |
| 35 | EXPORT_SYMBOL(input_release_device); |
| 36 | EXPORT_SYMBOL(input_open_device); |
| 37 | EXPORT_SYMBOL(input_close_device); |
| 38 | EXPORT_SYMBOL(input_accept_process); |
| 39 | EXPORT_SYMBOL(input_flush_device); |
| 40 | EXPORT_SYMBOL(input_event); |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 41 | EXPORT_SYMBOL_GPL(input_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
| 43 | #define INPUT_DEVICES 256 |
| 44 | |
| 45 | static LIST_HEAD(input_dev_list); |
| 46 | static LIST_HEAD(input_handler_list); |
| 47 | |
| 48 | static struct input_handler *input_table[8]; |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
| 51 | { |
| 52 | struct input_handle *handle; |
| 53 | |
| 54 | if (type > EV_MAX || !test_bit(type, dev->evbit)) |
| 55 | return; |
| 56 | |
| 57 | add_input_randomness(type, code, value); |
| 58 | |
| 59 | switch (type) { |
| 60 | |
| 61 | case EV_SYN: |
| 62 | switch (code) { |
| 63 | case SYN_CONFIG: |
| 64 | if (dev->event) dev->event(dev, type, code, value); |
| 65 | break; |
| 66 | |
| 67 | case SYN_REPORT: |
| 68 | if (dev->sync) return; |
| 69 | dev->sync = 1; |
| 70 | break; |
| 71 | } |
| 72 | break; |
| 73 | |
| 74 | case EV_KEY: |
| 75 | |
| 76 | if (code > KEY_MAX || !test_bit(code, dev->keybit) || !!test_bit(code, dev->key) == value) |
| 77 | return; |
| 78 | |
| 79 | if (value == 2) |
| 80 | break; |
| 81 | |
| 82 | change_bit(code, dev->key); |
| 83 | |
| 84 | if (test_bit(EV_REP, dev->evbit) && dev->rep[REP_PERIOD] && dev->rep[REP_DELAY] && dev->timer.data && value) { |
| 85 | dev->repeat_key = code; |
| 86 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_DELAY])); |
| 87 | } |
| 88 | |
| 89 | break; |
| 90 | |
Richard Purdie | 3158106 | 2005-09-06 15:19:06 -0700 | [diff] [blame] | 91 | case EV_SW: |
| 92 | |
| 93 | if (code > SW_MAX || !test_bit(code, dev->swbit) || !!test_bit(code, dev->sw) == value) |
| 94 | return; |
| 95 | |
| 96 | change_bit(code, dev->sw); |
| 97 | |
| 98 | break; |
| 99 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | case EV_ABS: |
| 101 | |
| 102 | if (code > ABS_MAX || !test_bit(code, dev->absbit)) |
| 103 | return; |
| 104 | |
| 105 | if (dev->absfuzz[code]) { |
| 106 | if ((value > dev->abs[code] - (dev->absfuzz[code] >> 1)) && |
| 107 | (value < dev->abs[code] + (dev->absfuzz[code] >> 1))) |
| 108 | return; |
| 109 | |
| 110 | if ((value > dev->abs[code] - dev->absfuzz[code]) && |
| 111 | (value < dev->abs[code] + dev->absfuzz[code])) |
| 112 | value = (dev->abs[code] * 3 + value) >> 2; |
| 113 | |
| 114 | if ((value > dev->abs[code] - (dev->absfuzz[code] << 1)) && |
| 115 | (value < dev->abs[code] + (dev->absfuzz[code] << 1))) |
| 116 | value = (dev->abs[code] + value) >> 1; |
| 117 | } |
| 118 | |
| 119 | if (dev->abs[code] == value) |
| 120 | return; |
| 121 | |
| 122 | dev->abs[code] = value; |
| 123 | break; |
| 124 | |
| 125 | case EV_REL: |
| 126 | |
| 127 | if (code > REL_MAX || !test_bit(code, dev->relbit) || (value == 0)) |
| 128 | return; |
| 129 | |
| 130 | break; |
| 131 | |
| 132 | case EV_MSC: |
| 133 | |
| 134 | if (code > MSC_MAX || !test_bit(code, dev->mscbit)) |
| 135 | return; |
| 136 | |
| 137 | if (dev->event) dev->event(dev, type, code, value); |
| 138 | |
| 139 | break; |
| 140 | |
| 141 | case EV_LED: |
| 142 | |
| 143 | if (code > LED_MAX || !test_bit(code, dev->ledbit) || !!test_bit(code, dev->led) == value) |
| 144 | return; |
| 145 | |
| 146 | change_bit(code, dev->led); |
| 147 | if (dev->event) dev->event(dev, type, code, value); |
| 148 | |
| 149 | break; |
| 150 | |
| 151 | case EV_SND: |
| 152 | |
| 153 | if (code > SND_MAX || !test_bit(code, dev->sndbit)) |
| 154 | return; |
| 155 | |
| 156 | if (dev->event) dev->event(dev, type, code, value); |
| 157 | |
| 158 | break; |
| 159 | |
| 160 | case EV_REP: |
| 161 | |
| 162 | if (code > REP_MAX || value < 0 || dev->rep[code] == value) return; |
| 163 | |
| 164 | dev->rep[code] = value; |
| 165 | if (dev->event) dev->event(dev, type, code, value); |
| 166 | |
| 167 | break; |
| 168 | |
| 169 | case EV_FF: |
| 170 | if (dev->event) dev->event(dev, type, code, value); |
| 171 | break; |
| 172 | } |
| 173 | |
| 174 | if (type != EV_SYN) |
| 175 | dev->sync = 0; |
| 176 | |
| 177 | if (dev->grab) |
| 178 | dev->grab->handler->event(dev->grab, type, code, value); |
| 179 | else |
| 180 | list_for_each_entry(handle, &dev->h_list, d_node) |
| 181 | if (handle->open) |
| 182 | handle->handler->event(handle, type, code, value); |
| 183 | } |
| 184 | |
| 185 | static void input_repeat_key(unsigned long data) |
| 186 | { |
| 187 | struct input_dev *dev = (void *) data; |
| 188 | |
| 189 | if (!test_bit(dev->repeat_key, dev->key)) |
| 190 | return; |
| 191 | |
| 192 | input_event(dev, EV_KEY, dev->repeat_key, 2); |
| 193 | input_sync(dev); |
| 194 | |
| 195 | if (dev->rep[REP_PERIOD]) |
| 196 | mod_timer(&dev->timer, jiffies + msecs_to_jiffies(dev->rep[REP_PERIOD])); |
| 197 | } |
| 198 | |
| 199 | int input_accept_process(struct input_handle *handle, struct file *file) |
| 200 | { |
| 201 | if (handle->dev->accept) |
| 202 | return handle->dev->accept(handle->dev, file); |
| 203 | |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | int input_grab_device(struct input_handle *handle) |
| 208 | { |
| 209 | if (handle->dev->grab) |
| 210 | return -EBUSY; |
| 211 | |
| 212 | handle->dev->grab = handle; |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | void input_release_device(struct input_handle *handle) |
| 217 | { |
| 218 | if (handle->dev->grab == handle) |
| 219 | handle->dev->grab = NULL; |
| 220 | } |
| 221 | |
| 222 | int input_open_device(struct input_handle *handle) |
| 223 | { |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 224 | struct input_dev *dev = handle->dev; |
| 225 | int err; |
| 226 | |
| 227 | err = down_interruptible(&dev->sem); |
| 228 | if (err) |
| 229 | return err; |
| 230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | handle->open++; |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 232 | |
| 233 | if (!dev->users++ && dev->open) |
| 234 | err = dev->open(dev); |
| 235 | |
| 236 | if (err) |
| 237 | handle->open--; |
| 238 | |
| 239 | up(&dev->sem); |
| 240 | |
| 241 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | int input_flush_device(struct input_handle* handle, struct file* file) |
| 245 | { |
| 246 | if (handle->dev->flush) |
| 247 | return handle->dev->flush(handle->dev, file); |
| 248 | |
| 249 | return 0; |
| 250 | } |
| 251 | |
| 252 | void input_close_device(struct input_handle *handle) |
| 253 | { |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 254 | struct input_dev *dev = handle->dev; |
| 255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | input_release_device(handle); |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 257 | |
| 258 | down(&dev->sem); |
| 259 | |
| 260 | if (!--dev->users && dev->close) |
| 261 | dev->close(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | handle->open--; |
Dmitry Torokhov | 0fbf87c | 2005-05-29 02:29:25 -0500 | [diff] [blame] | 263 | |
| 264 | up(&dev->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | static void input_link_handle(struct input_handle *handle) |
| 268 | { |
| 269 | list_add_tail(&handle->d_node, &handle->dev->h_list); |
| 270 | list_add_tail(&handle->h_node, &handle->handler->h_list); |
| 271 | } |
| 272 | |
| 273 | #define MATCH_BIT(bit, max) \ |
| 274 | for (i = 0; i < NBITS(max); i++) \ |
| 275 | if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \ |
| 276 | break; \ |
| 277 | if (i != NBITS(max)) \ |
| 278 | continue; |
| 279 | |
| 280 | static struct input_device_id *input_match_device(struct input_device_id *id, struct input_dev *dev) |
| 281 | { |
| 282 | int i; |
| 283 | |
| 284 | for (; id->flags || id->driver_info; id++) { |
| 285 | |
| 286 | if (id->flags & INPUT_DEVICE_ID_MATCH_BUS) |
| 287 | if (id->id.bustype != dev->id.bustype) |
| 288 | continue; |
| 289 | |
| 290 | if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR) |
| 291 | if (id->id.vendor != dev->id.vendor) |
| 292 | continue; |
| 293 | |
| 294 | if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT) |
| 295 | if (id->id.product != dev->id.product) |
| 296 | continue; |
| 297 | |
| 298 | if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION) |
| 299 | if (id->id.version != dev->id.version) |
| 300 | continue; |
| 301 | |
| 302 | MATCH_BIT(evbit, EV_MAX); |
| 303 | MATCH_BIT(keybit, KEY_MAX); |
| 304 | MATCH_BIT(relbit, REL_MAX); |
| 305 | MATCH_BIT(absbit, ABS_MAX); |
| 306 | MATCH_BIT(mscbit, MSC_MAX); |
| 307 | MATCH_BIT(ledbit, LED_MAX); |
| 308 | MATCH_BIT(sndbit, SND_MAX); |
| 309 | MATCH_BIT(ffbit, FF_MAX); |
Dmitry Torokhov | ff13f98 | 2005-09-24 02:02:29 -0500 | [diff] [blame] | 310 | MATCH_BIT(swbit, SW_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | |
| 312 | return id; |
| 313 | } |
| 314 | |
| 315 | return NULL; |
| 316 | } |
| 317 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 318 | static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap, int max) |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 319 | { |
| 320 | int i; |
| 321 | int len = 0; |
| 322 | |
| 323 | for (i = NBITS(max) - 1; i > 0; i--) |
| 324 | if (bitmap[i]) |
| 325 | break; |
| 326 | |
| 327 | for (; i >= 0; i--) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 328 | len += snprintf(buf + len, max(buf_size - len, 0), |
| 329 | "%lx%s", bitmap[i], i > 0 ? " " : ""); |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 330 | return len; |
| 331 | } |
| 332 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | #ifdef CONFIG_PROC_FS |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 334 | |
| 335 | static struct proc_dir_entry *proc_bus_input_dir; |
| 336 | static DECLARE_WAIT_QUEUE_HEAD(input_devices_poll_wait); |
| 337 | static int input_devices_state; |
| 338 | |
| 339 | static inline void input_wakeup_procfs_readers(void) |
| 340 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | input_devices_state++; |
| 342 | wake_up(&input_devices_poll_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | } |
| 344 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 345 | static unsigned int input_devices_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 347 | int state = input_devices_state; |
| 348 | poll_wait(file, &input_devices_poll_wait, wait); |
| 349 | if (state != input_devices_state) |
| 350 | return POLLIN | POLLRDNORM; |
| 351 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | } |
| 353 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 354 | #define SPRINTF_BIT(ev, bm) \ |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 355 | do { \ |
| 356 | len += sprintf(buf + len, "B: %s=", #ev); \ |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 357 | len += input_print_bitmap(buf + len, INT_MAX, \ |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 358 | dev->bm##bit, ev##_MAX); \ |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 359 | len += sprintf(buf + len, "\n"); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | } while (0) |
| 361 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 362 | #define TEST_AND_SPRINTF_BIT(ev, bm) \ |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 363 | do { \ |
| 364 | if (test_bit(EV_##ev, dev->evbit)) \ |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 365 | SPRINTF_BIT(ev, bm); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } while (0) |
| 367 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | static int input_devices_read(char *buf, char **start, off_t pos, int count, int *eof, void *data) |
| 369 | { |
| 370 | struct input_dev *dev; |
| 371 | struct input_handle *handle; |
Dmitry Torokhov | 051b2fe | 2005-09-15 02:01:54 -0500 | [diff] [blame] | 372 | const char *path; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
| 374 | off_t at = 0; |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 375 | int len, cnt = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | |
| 377 | list_for_each_entry(dev, &input_dev_list, node) { |
| 378 | |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 379 | path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL); |
Dmitry Torokhov | 051b2fe | 2005-09-15 02:01:54 -0500 | [diff] [blame] | 380 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | len = sprintf(buf, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n", |
| 382 | dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version); |
| 383 | |
| 384 | len += sprintf(buf + len, "N: Name=\"%s\"\n", dev->name ? dev->name : ""); |
| 385 | len += sprintf(buf + len, "P: Phys=%s\n", dev->phys ? dev->phys : ""); |
Dmitry Torokhov | 051b2fe | 2005-09-15 02:01:54 -0500 | [diff] [blame] | 386 | len += sprintf(buf + len, "S: Sysfs=%s\n", path ? path : ""); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | len += sprintf(buf + len, "H: Handlers="); |
| 388 | |
| 389 | list_for_each_entry(handle, &dev->h_list, d_node) |
| 390 | len += sprintf(buf + len, "%s ", handle->name); |
| 391 | |
| 392 | len += sprintf(buf + len, "\n"); |
| 393 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 394 | SPRINTF_BIT(EV, ev); |
| 395 | TEST_AND_SPRINTF_BIT(KEY, key); |
| 396 | TEST_AND_SPRINTF_BIT(REL, rel); |
| 397 | TEST_AND_SPRINTF_BIT(ABS, abs); |
| 398 | TEST_AND_SPRINTF_BIT(MSC, msc); |
| 399 | TEST_AND_SPRINTF_BIT(LED, led); |
| 400 | TEST_AND_SPRINTF_BIT(SND, snd); |
| 401 | TEST_AND_SPRINTF_BIT(FF, ff); |
| 402 | TEST_AND_SPRINTF_BIT(SW, sw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
| 404 | len += sprintf(buf + len, "\n"); |
| 405 | |
| 406 | at += len; |
| 407 | |
| 408 | if (at >= pos) { |
| 409 | if (!*start) { |
| 410 | *start = buf + (pos - (at - len)); |
| 411 | cnt = at - pos; |
| 412 | } else cnt += len; |
| 413 | buf += len; |
| 414 | if (cnt >= count) |
| 415 | break; |
| 416 | } |
Dmitry Torokhov | 051b2fe | 2005-09-15 02:01:54 -0500 | [diff] [blame] | 417 | |
| 418 | kfree(path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | } |
| 420 | |
| 421 | if (&dev->node == &input_dev_list) |
| 422 | *eof = 1; |
| 423 | |
| 424 | return (count > cnt) ? cnt : count; |
| 425 | } |
| 426 | |
| 427 | static int input_handlers_read(char *buf, char **start, off_t pos, int count, int *eof, void *data) |
| 428 | { |
| 429 | struct input_handler *handler; |
| 430 | |
| 431 | off_t at = 0; |
| 432 | int len = 0, cnt = 0; |
| 433 | int i = 0; |
| 434 | |
| 435 | list_for_each_entry(handler, &input_handler_list, node) { |
| 436 | |
| 437 | if (handler->fops) |
| 438 | len = sprintf(buf, "N: Number=%d Name=%s Minor=%d\n", |
| 439 | i++, handler->name, handler->minor); |
| 440 | else |
| 441 | len = sprintf(buf, "N: Number=%d Name=%s\n", |
| 442 | i++, handler->name); |
| 443 | |
| 444 | at += len; |
| 445 | |
| 446 | if (at >= pos) { |
| 447 | if (!*start) { |
| 448 | *start = buf + (pos - (at - len)); |
| 449 | cnt = at - pos; |
| 450 | } else cnt += len; |
| 451 | buf += len; |
| 452 | if (cnt >= count) |
| 453 | break; |
| 454 | } |
| 455 | } |
| 456 | if (&handler->node == &input_handler_list) |
| 457 | *eof = 1; |
| 458 | |
| 459 | return (count > cnt) ? cnt : count; |
| 460 | } |
| 461 | |
Luke Kosewski | e334016fc | 2005-06-01 02:39:28 -0500 | [diff] [blame] | 462 | static struct file_operations input_fileops; |
| 463 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | static int __init input_proc_init(void) |
| 465 | { |
| 466 | struct proc_dir_entry *entry; |
| 467 | |
| 468 | proc_bus_input_dir = proc_mkdir("input", proc_bus); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 469 | if (!proc_bus_input_dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | return -ENOMEM; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 471 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | proc_bus_input_dir->owner = THIS_MODULE; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 473 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | entry = create_proc_read_entry("devices", 0, proc_bus_input_dir, input_devices_read, NULL); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 475 | if (!entry) |
| 476 | goto fail1; |
| 477 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | entry->owner = THIS_MODULE; |
Luke Kosewski | e334016fc | 2005-06-01 02:39:28 -0500 | [diff] [blame] | 479 | input_fileops = *entry->proc_fops; |
| 480 | entry->proc_fops = &input_fileops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | entry->proc_fops->poll = input_devices_poll; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 482 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | entry = create_proc_read_entry("handlers", 0, proc_bus_input_dir, input_handlers_read, NULL); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 484 | if (!entry) |
| 485 | goto fail2; |
| 486 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | entry->owner = THIS_MODULE; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 488 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | return 0; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 490 | |
| 491 | fail2: remove_proc_entry("devices", proc_bus_input_dir); |
| 492 | fail1: remove_proc_entry("input", proc_bus); |
| 493 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 495 | |
Andrew Morton | beffbdc | 2005-07-01 23:54:30 -0500 | [diff] [blame] | 496 | static void input_proc_exit(void) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 497 | { |
| 498 | remove_proc_entry("devices", proc_bus_input_dir); |
| 499 | remove_proc_entry("handlers", proc_bus_input_dir); |
| 500 | remove_proc_entry("input", proc_bus); |
| 501 | } |
| 502 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | #else /* !CONFIG_PROC_FS */ |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 504 | static inline void input_wakeup_procfs_readers(void) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | static inline int input_proc_init(void) { return 0; } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 506 | static inline void input_proc_exit(void) { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | #endif |
| 508 | |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 509 | #define INPUT_DEV_STRING_ATTR_SHOW(name) \ |
| 510 | static ssize_t input_dev_show_##name(struct class_device *dev, char *buf) \ |
| 511 | { \ |
| 512 | struct input_dev *input_dev = to_input_dev(dev); \ |
| 513 | int retval; \ |
| 514 | \ |
| 515 | retval = down_interruptible(&input_dev->sem); \ |
| 516 | if (retval) \ |
| 517 | return retval; \ |
| 518 | \ |
| 519 | retval = sprintf(buf, "%s\n", input_dev->name ? input_dev->name : ""); \ |
| 520 | \ |
| 521 | up(&input_dev->sem); \ |
| 522 | \ |
| 523 | return retval; \ |
Greg Kroah-Hartman | 629b77a | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 524 | } \ |
| 525 | static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_##name, NULL); |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 526 | |
| 527 | INPUT_DEV_STRING_ATTR_SHOW(name); |
| 528 | INPUT_DEV_STRING_ATTR_SHOW(phys); |
| 529 | INPUT_DEV_STRING_ATTR_SHOW(uniq); |
| 530 | |
Greg Kroah-Hartman | 629b77a | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 531 | static struct attribute *input_dev_attrs[] = { |
| 532 | &class_device_attr_name.attr, |
| 533 | &class_device_attr_phys.attr, |
| 534 | &class_device_attr_uniq.attr, |
| 535 | NULL |
| 536 | }; |
| 537 | |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 538 | static struct attribute_group input_dev_attr_group = { |
Greg Kroah-Hartman | 629b77a | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 539 | .attrs = input_dev_attrs, |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 540 | }; |
| 541 | |
| 542 | #define INPUT_DEV_ID_ATTR(name) \ |
| 543 | static ssize_t input_dev_show_id_##name(struct class_device *dev, char *buf) \ |
| 544 | { \ |
| 545 | struct input_dev *input_dev = to_input_dev(dev); \ |
| 546 | return sprintf(buf, "%04x\n", input_dev->id.name); \ |
| 547 | } \ |
| 548 | static CLASS_DEVICE_ATTR(name, S_IRUGO, input_dev_show_id_##name, NULL); |
| 549 | |
| 550 | INPUT_DEV_ID_ATTR(bustype); |
| 551 | INPUT_DEV_ID_ATTR(vendor); |
| 552 | INPUT_DEV_ID_ATTR(product); |
| 553 | INPUT_DEV_ID_ATTR(version); |
| 554 | |
| 555 | static struct attribute *input_dev_id_attrs[] = { |
| 556 | &class_device_attr_bustype.attr, |
| 557 | &class_device_attr_vendor.attr, |
| 558 | &class_device_attr_product.attr, |
| 559 | &class_device_attr_version.attr, |
| 560 | NULL |
| 561 | }; |
| 562 | |
| 563 | static struct attribute_group input_dev_id_attr_group = { |
| 564 | .name = "id", |
| 565 | .attrs = input_dev_id_attrs, |
| 566 | }; |
| 567 | |
| 568 | #define INPUT_DEV_CAP_ATTR(ev, bm) \ |
| 569 | static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \ |
| 570 | { \ |
| 571 | struct input_dev *input_dev = to_input_dev(dev); \ |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 572 | return input_print_bitmap(buf, PAGE_SIZE, input_dev->bm##bit, ev##_MAX);\ |
Dmitry Torokhov | 5c1e9a6 | 2005-09-15 02:01:55 -0500 | [diff] [blame] | 573 | } \ |
| 574 | static CLASS_DEVICE_ATTR(bm, S_IRUGO, input_dev_show_cap_##bm, NULL); |
| 575 | |
| 576 | INPUT_DEV_CAP_ATTR(EV, ev); |
| 577 | INPUT_DEV_CAP_ATTR(KEY, key); |
| 578 | INPUT_DEV_CAP_ATTR(REL, rel); |
| 579 | INPUT_DEV_CAP_ATTR(ABS, abs); |
| 580 | INPUT_DEV_CAP_ATTR(MSC, msc); |
| 581 | INPUT_DEV_CAP_ATTR(LED, led); |
| 582 | INPUT_DEV_CAP_ATTR(SND, snd); |
| 583 | INPUT_DEV_CAP_ATTR(FF, ff); |
| 584 | INPUT_DEV_CAP_ATTR(SW, sw); |
| 585 | |
| 586 | static struct attribute *input_dev_caps_attrs[] = { |
| 587 | &class_device_attr_ev.attr, |
| 588 | &class_device_attr_key.attr, |
| 589 | &class_device_attr_rel.attr, |
| 590 | &class_device_attr_abs.attr, |
| 591 | &class_device_attr_msc.attr, |
| 592 | &class_device_attr_led.attr, |
| 593 | &class_device_attr_snd.attr, |
| 594 | &class_device_attr_ff.attr, |
| 595 | &class_device_attr_sw.attr, |
| 596 | NULL |
| 597 | }; |
| 598 | |
| 599 | static struct attribute_group input_dev_caps_attr_group = { |
| 600 | .name = "capabilities", |
| 601 | .attrs = input_dev_caps_attrs, |
| 602 | }; |
| 603 | |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 604 | static void input_dev_release(struct class_device *class_dev) |
| 605 | { |
| 606 | struct input_dev *dev = to_input_dev(class_dev); |
| 607 | |
| 608 | kfree(dev); |
| 609 | module_put(THIS_MODULE); |
| 610 | } |
| 611 | |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 612 | /* |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame^] | 613 | * Input uevent interface - loading event handlers based on |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 614 | * device bitfields. |
| 615 | */ |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame^] | 616 | static int input_add_uevent_bm_var(char **envp, int num_envp, int *cur_index, |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 617 | char *buffer, int buffer_size, int *cur_len, |
| 618 | const char *name, unsigned long *bitmap, int max) |
| 619 | { |
| 620 | if (*cur_index >= num_envp - 1) |
| 621 | return -ENOMEM; |
| 622 | |
| 623 | envp[*cur_index] = buffer + *cur_len; |
| 624 | |
| 625 | *cur_len += snprintf(buffer + *cur_len, max(buffer_size - *cur_len, 0), name); |
| 626 | if (*cur_len > buffer_size) |
| 627 | return -ENOMEM; |
| 628 | |
| 629 | *cur_len += input_print_bitmap(buffer + *cur_len, |
| 630 | max(buffer_size - *cur_len, 0), |
| 631 | bitmap, max) + 1; |
| 632 | if (*cur_len > buffer_size) |
| 633 | return -ENOMEM; |
| 634 | |
| 635 | (*cur_index)++; |
| 636 | return 0; |
| 637 | } |
| 638 | |
| 639 | #define INPUT_ADD_HOTPLUG_VAR(fmt, val...) \ |
| 640 | do { \ |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame^] | 641 | int err = add_uevent_var(envp, num_envp, &i, \ |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 642 | buffer, buffer_size, &len, \ |
| 643 | fmt, val); \ |
| 644 | if (err) \ |
| 645 | return err; \ |
| 646 | } while (0) |
| 647 | |
| 648 | #define INPUT_ADD_HOTPLUG_BM_VAR(name, bm, max) \ |
| 649 | do { \ |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame^] | 650 | int err = input_add_uevent_bm_var(envp, num_envp, &i, \ |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 651 | buffer, buffer_size, &len, \ |
| 652 | name, bm, max); \ |
| 653 | if (err) \ |
| 654 | return err; \ |
| 655 | } while (0) |
| 656 | |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame^] | 657 | static int input_dev_uevent(struct class_device *cdev, char **envp, |
| 658 | int num_envp, char *buffer, int buffer_size) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 659 | { |
| 660 | struct input_dev *dev = to_input_dev(cdev); |
| 661 | int i = 0; |
| 662 | int len = 0; |
| 663 | |
| 664 | INPUT_ADD_HOTPLUG_VAR("PRODUCT=%x/%x/%x/%x", |
| 665 | dev->id.bustype, dev->id.vendor, |
| 666 | dev->id.product, dev->id.version); |
| 667 | if (dev->name) |
| 668 | INPUT_ADD_HOTPLUG_VAR("NAME=\"%s\"", dev->name); |
| 669 | if (dev->phys) |
| 670 | INPUT_ADD_HOTPLUG_VAR("PHYS=\"%s\"", dev->phys); |
Dmitry Torokhov | 08de1f0 | 2005-11-08 21:34:29 -0800 | [diff] [blame] | 671 | if (dev->uniq) |
Dmitry Torokhov | a7fadbe | 2005-09-15 02:01:57 -0500 | [diff] [blame] | 672 | INPUT_ADD_HOTPLUG_VAR("UNIQ=\"%s\"", dev->uniq); |
| 673 | |
| 674 | INPUT_ADD_HOTPLUG_BM_VAR("EV=", dev->evbit, EV_MAX); |
| 675 | if (test_bit(EV_KEY, dev->evbit)) |
| 676 | INPUT_ADD_HOTPLUG_BM_VAR("KEY=", dev->keybit, KEY_MAX); |
| 677 | if (test_bit(EV_REL, dev->evbit)) |
| 678 | INPUT_ADD_HOTPLUG_BM_VAR("REL=", dev->relbit, REL_MAX); |
| 679 | if (test_bit(EV_ABS, dev->evbit)) |
| 680 | INPUT_ADD_HOTPLUG_BM_VAR("ABS=", dev->absbit, ABS_MAX); |
| 681 | if (test_bit(EV_MSC, dev->evbit)) |
| 682 | INPUT_ADD_HOTPLUG_BM_VAR("MSC=", dev->mscbit, MSC_MAX); |
| 683 | if (test_bit(EV_LED, dev->evbit)) |
| 684 | INPUT_ADD_HOTPLUG_BM_VAR("LED=", dev->ledbit, LED_MAX); |
| 685 | if (test_bit(EV_SND, dev->evbit)) |
| 686 | INPUT_ADD_HOTPLUG_BM_VAR("SND=", dev->sndbit, SND_MAX); |
| 687 | if (test_bit(EV_FF, dev->evbit)) |
| 688 | INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX); |
| 689 | if (test_bit(EV_SW, dev->evbit)) |
| 690 | INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX); |
| 691 | |
| 692 | envp[i] = NULL; |
| 693 | |
| 694 | return 0; |
| 695 | } |
| 696 | |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 697 | struct class input_class = { |
| 698 | .name = "input", |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 699 | .release = input_dev_release, |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame^] | 700 | .uevent = input_dev_uevent, |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 701 | }; |
| 702 | |
| 703 | struct input_dev *input_allocate_device(void) |
| 704 | { |
| 705 | struct input_dev *dev; |
| 706 | |
| 707 | dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL); |
| 708 | if (dev) { |
| 709 | dev->dynalloc = 1; |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 710 | dev->cdev.class = &input_class; |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 711 | class_device_initialize(&dev->cdev); |
| 712 | INIT_LIST_HEAD(&dev->h_list); |
| 713 | INIT_LIST_HEAD(&dev->node); |
| 714 | } |
| 715 | |
| 716 | return dev; |
| 717 | } |
| 718 | |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 719 | int input_register_device(struct input_dev *dev) |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 720 | { |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 721 | static atomic_t input_no = ATOMIC_INIT(0); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 722 | struct input_handle *handle; |
| 723 | struct input_handler *handler; |
| 724 | struct input_device_id *id; |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 725 | const char *path; |
| 726 | int error; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 727 | |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 728 | if (!dev->dynalloc) { |
| 729 | printk(KERN_WARNING "input: device %s is statically allocated, will not register\n" |
| 730 | "Please convert to input_allocate_device() or contact dtor_core@ameritech.net\n", |
| 731 | dev->name ? dev->name : "<Unknown>"); |
| 732 | return -EINVAL; |
| 733 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 734 | |
| 735 | init_MUTEX(&dev->sem); |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 736 | set_bit(EV_SYN, dev->evbit); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 737 | |
| 738 | /* |
| 739 | * If delay and period are pre-set by the driver, then autorepeating |
| 740 | * is handled by the driver itself and we don't do it in input.c. |
| 741 | */ |
| 742 | |
| 743 | init_timer(&dev->timer); |
| 744 | if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) { |
| 745 | dev->timer.data = (long) dev; |
| 746 | dev->timer.function = input_repeat_key; |
| 747 | dev->rep[REP_DELAY] = 250; |
| 748 | dev->rep[REP_PERIOD] = 33; |
| 749 | } |
| 750 | |
| 751 | INIT_LIST_HEAD(&dev->h_list); |
| 752 | list_add_tail(&dev->node, &input_dev_list); |
| 753 | |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 754 | dev->cdev.class = &input_class; |
| 755 | snprintf(dev->cdev.class_id, sizeof(dev->cdev.class_id), |
| 756 | "input%ld", (unsigned long) atomic_inc_return(&input_no) - 1); |
| 757 | |
| 758 | error = class_device_add(&dev->cdev); |
| 759 | if (error) |
| 760 | return error; |
| 761 | |
| 762 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_attr_group); |
| 763 | if (error) |
| 764 | goto fail1; |
| 765 | |
| 766 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_id_attr_group); |
| 767 | if (error) |
| 768 | goto fail2; |
| 769 | |
| 770 | error = sysfs_create_group(&dev->cdev.kobj, &input_dev_caps_attr_group); |
| 771 | if (error) |
| 772 | goto fail3; |
| 773 | |
| 774 | __module_get(THIS_MODULE); |
| 775 | |
| 776 | path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL); |
| 777 | printk(KERN_INFO "input: %s as %s\n", |
| 778 | dev->name ? dev->name : "Unspecified device", path ? path : "N/A"); |
| 779 | kfree(path); |
Greg Kroah-Hartman | 1020402 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 780 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 781 | list_for_each_entry(handler, &input_handler_list, node) |
| 782 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) |
| 783 | if ((id = input_match_device(handler->id_table, dev))) |
| 784 | if ((handle = handler->connect(handler, dev, id))) |
| 785 | input_link_handle(handle); |
| 786 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 787 | input_wakeup_procfs_readers(); |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 788 | |
| 789 | return 0; |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 790 | |
| 791 | fail3: sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group); |
| 792 | fail2: sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group); |
| 793 | fail1: class_device_del(&dev->cdev); |
| 794 | return error; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 795 | } |
| 796 | |
| 797 | void input_unregister_device(struct input_dev *dev) |
| 798 | { |
| 799 | struct list_head * node, * next; |
| 800 | |
| 801 | if (!dev) return; |
| 802 | |
| 803 | del_timer_sync(&dev->timer); |
| 804 | |
| 805 | list_for_each_safe(node, next, &dev->h_list) { |
| 806 | struct input_handle * handle = to_handle(node); |
| 807 | list_del_init(&handle->d_node); |
| 808 | list_del_init(&handle->h_node); |
| 809 | handle->handler->disconnect(handle); |
| 810 | } |
| 811 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 812 | list_del_init(&dev->node); |
| 813 | |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 814 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_caps_attr_group); |
| 815 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_id_attr_group); |
Dmitry Torokhov | bd0ef23 | 2005-11-20 00:56:31 -0500 | [diff] [blame] | 816 | sysfs_remove_group(&dev->cdev.kobj, &input_dev_attr_group); |
Dmitry Torokhov | 5f94548 | 2005-11-02 22:51:46 -0500 | [diff] [blame] | 817 | class_device_unregister(&dev->cdev); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 818 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 819 | input_wakeup_procfs_readers(); |
| 820 | } |
| 821 | |
| 822 | void input_register_handler(struct input_handler *handler) |
| 823 | { |
| 824 | struct input_dev *dev; |
| 825 | struct input_handle *handle; |
| 826 | struct input_device_id *id; |
| 827 | |
| 828 | if (!handler) return; |
| 829 | |
| 830 | INIT_LIST_HEAD(&handler->h_list); |
| 831 | |
| 832 | if (handler->fops != NULL) |
| 833 | input_table[handler->minor >> 5] = handler; |
| 834 | |
| 835 | list_add_tail(&handler->node, &input_handler_list); |
| 836 | |
| 837 | list_for_each_entry(dev, &input_dev_list, node) |
| 838 | if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) |
| 839 | if ((id = input_match_device(handler->id_table, dev))) |
| 840 | if ((handle = handler->connect(handler, dev, id))) |
| 841 | input_link_handle(handle); |
| 842 | |
| 843 | input_wakeup_procfs_readers(); |
| 844 | } |
| 845 | |
| 846 | void input_unregister_handler(struct input_handler *handler) |
| 847 | { |
| 848 | struct list_head * node, * next; |
| 849 | |
| 850 | list_for_each_safe(node, next, &handler->h_list) { |
| 851 | struct input_handle * handle = to_handle_h(node); |
| 852 | list_del_init(&handle->h_node); |
| 853 | list_del_init(&handle->d_node); |
| 854 | handler->disconnect(handle); |
| 855 | } |
| 856 | |
| 857 | list_del_init(&handler->node); |
| 858 | |
| 859 | if (handler->fops != NULL) |
| 860 | input_table[handler->minor >> 5] = NULL; |
| 861 | |
| 862 | input_wakeup_procfs_readers(); |
| 863 | } |
| 864 | |
| 865 | static int input_open_file(struct inode *inode, struct file *file) |
| 866 | { |
| 867 | struct input_handler *handler = input_table[iminor(inode) >> 5]; |
| 868 | struct file_operations *old_fops, *new_fops = NULL; |
| 869 | int err; |
| 870 | |
| 871 | /* No load-on-demand here? */ |
| 872 | if (!handler || !(new_fops = fops_get(handler->fops))) |
| 873 | return -ENODEV; |
| 874 | |
| 875 | /* |
| 876 | * That's _really_ odd. Usually NULL ->open means "nothing special", |
| 877 | * not "no device". Oh, well... |
| 878 | */ |
| 879 | if (!new_fops->open) { |
| 880 | fops_put(new_fops); |
| 881 | return -ENODEV; |
| 882 | } |
| 883 | old_fops = file->f_op; |
| 884 | file->f_op = new_fops; |
| 885 | |
| 886 | err = new_fops->open(inode, file); |
| 887 | |
| 888 | if (err) { |
| 889 | fops_put(file->f_op); |
| 890 | file->f_op = fops_get(old_fops); |
| 891 | } |
| 892 | fops_put(old_fops); |
| 893 | return err; |
| 894 | } |
| 895 | |
| 896 | static struct file_operations input_fops = { |
| 897 | .owner = THIS_MODULE, |
| 898 | .open = input_open_file, |
| 899 | }; |
| 900 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | static int __init input_init(void) |
| 902 | { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 903 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 905 | err = class_register(&input_class); |
Dmitry Torokhov | d19fbe8 | 2005-09-15 02:01:39 -0500 | [diff] [blame] | 906 | if (err) { |
| 907 | printk(KERN_ERR "input: unable to register input_dev class\n"); |
| 908 | return err; |
| 909 | } |
| 910 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 911 | err = input_proc_init(); |
| 912 | if (err) |
Greg Kroah-Hartman | b0fdfeb | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 913 | goto fail1; |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 914 | |
| 915 | err = register_chrdev(INPUT_MAJOR, "input", &input_fops); |
| 916 | if (err) { |
| 917 | printk(KERN_ERR "input: unable to register char major %d", INPUT_MAJOR); |
Greg Kroah-Hartman | b0fdfeb | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 918 | goto fail2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | } |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 920 | |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 921 | return 0; |
| 922 | |
Greg Kroah-Hartman | b0fdfeb | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 923 | fail2: input_proc_exit(); |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 924 | fail1: class_unregister(&input_class); |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 925 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | } |
| 927 | |
| 928 | static void __exit input_exit(void) |
| 929 | { |
Dmitry Torokhov | f96b434 | 2005-06-30 00:50:29 -0500 | [diff] [blame] | 930 | input_proc_exit(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | unregister_chrdev(INPUT_MAJOR, "input"); |
Greg Kroah-Hartman | ea9f240 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 932 | class_unregister(&input_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | } |
| 934 | |
| 935 | subsys_initcall(input_init); |
| 936 | module_exit(input_exit); |