Luming Yu | fb9802f | 2005-03-18 18:03:45 -0500 | [diff] [blame] | 1 | /* |
| 2 | * hotkey.c - ACPI Hotkey Driver ($Revision:$) |
| 3 | * |
| 4 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> |
| 5 | * |
| 6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or (at |
| 11 | * your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along |
| 19 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 21 | * |
| 22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 23 | */ |
| 24 | #include <linux/kernel.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/types.h> |
| 28 | #include <linux/proc_fs.h> |
| 29 | #include <linux/sched.h> |
| 30 | #include <linux/kmod.h> |
| 31 | #include <linux/seq_file.h> |
| 32 | #include <acpi/acpi_drivers.h> |
| 33 | #include <acpi/acpi_bus.h> |
| 34 | #include <asm/uaccess.h> |
| 35 | |
| 36 | #define HOTKEY_ACPI_VERSION "0.1" |
| 37 | |
| 38 | #define HOTKEY_PROC "hotkey" |
| 39 | #define HOTKEY_EV_CONFIG "event_config" |
| 40 | #define HOTKEY_PL_CONFIG "poll_config" |
| 41 | #define HOTKEY_ACTION "action" |
| 42 | #define HOTKEY_INFO "info" |
| 43 | |
| 44 | #define ACPI_HOTK_NAME "Generic Hotkey Driver" |
| 45 | #define ACPI_HOTK_CLASS "Hotkey" |
| 46 | #define ACPI_HOTK_DEVICE_NAME "Hotkey" |
| 47 | #define ACPI_HOTK_HID "Unknown?" |
| 48 | #define ACPI_HOTKEY_COMPONENT 0x20000000 |
| 49 | |
| 50 | #define ACPI_HOTKEY_EVENT 0x1 |
| 51 | #define ACPI_HOTKEY_POLLING 0x2 |
| 52 | #define ACPI_UNDEFINED_EVENT 0xf |
| 53 | |
| 54 | #define MAX_CONFIG_RECORD_LEN 80 |
| 55 | #define MAX_NAME_PATH_LEN 80 |
| 56 | #define MAX_CALL_PARM 80 |
| 57 | |
| 58 | #define IS_EVENT(e) 0xff /* ((e) & 0x40000000) */ |
| 59 | #define IS_POLL(e) 0xff /* (~((e) & 0x40000000)) */ |
| 60 | |
| 61 | #define _COMPONENT ACPI_HOTKEY_COMPONENT |
| 62 | ACPI_MODULE_NAME("acpi_hotkey") |
| 63 | |
| 64 | MODULE_AUTHOR("luming.yu@intel.com"); |
| 65 | MODULE_DESCRIPTION(ACPI_HOTK_NAME); |
| 66 | MODULE_LICENSE("GPL"); |
| 67 | |
| 68 | /* standardized internal hotkey number/event */ |
| 69 | enum { |
| 70 | /* Video Extension event */ |
| 71 | HK_EVENT_CYCLE_OUTPUT_DEVICE = 0x80, |
| 72 | HK_EVENT_OUTPUT_DEVICE_STATUS_CHANGE, |
| 73 | HK_EVENT_CYCLE_DISPLAY_OUTPUT, |
| 74 | HK_EVENT_NEXT_DISPLAY_OUTPUT, |
| 75 | HK_EVENT_PREVIOUS_DISPLAY_OUTPUT, |
| 76 | HK_EVENT_CYCLE_BRIGHTNESS, |
| 77 | HK_EVENT_INCREASE_BRIGHTNESS, |
| 78 | HK_EVENT_DECREASE_BRIGHTNESS, |
| 79 | HK_EVENT_ZERO_BRIGHTNESS, |
| 80 | HK_EVENT_DISPLAY_DEVICE_OFF, |
| 81 | |
| 82 | /* Snd Card event */ |
| 83 | HK_EVENT_VOLUME_MUTE, |
| 84 | HK_EVENT_VOLUME_INCLREASE, |
| 85 | HK_EVENT_VOLUME_DECREASE, |
| 86 | |
| 87 | /* running state control */ |
| 88 | HK_EVENT_ENTERRING_S3, |
| 89 | HK_EVENT_ENTERRING_S4, |
| 90 | HK_EVENT_ENTERRING_S5, |
| 91 | }; |
| 92 | |
| 93 | /* procdir we use */ |
| 94 | static struct proc_dir_entry *hotkey_proc_dir; |
| 95 | static struct proc_dir_entry *hotkey_config; |
| 96 | static struct proc_dir_entry *hotkey_poll_config; |
| 97 | static struct proc_dir_entry *hotkey_action; |
| 98 | static struct proc_dir_entry *hotkey_info; |
| 99 | |
| 100 | /* linkage for all type of hotkey */ |
| 101 | struct acpi_hotkey_link { |
| 102 | struct list_head entries; |
| 103 | int hotkey_type; /* event or polling based hotkey */ |
| 104 | int hotkey_standard_num; /* standardized hotkey(event) number */ |
| 105 | }; |
| 106 | |
| 107 | /* event based hotkey */ |
| 108 | struct acpi_event_hotkey { |
| 109 | struct acpi_hotkey_link hotkey_link; |
| 110 | int flag; |
| 111 | acpi_handle bus_handle; /* bus to install notify handler */ |
| 112 | int external_hotkey_num; /* external hotkey/event number */ |
| 113 | acpi_handle action_handle; /* acpi handle attached aml action method */ |
| 114 | char *action_method; /* action method */ |
| 115 | }; |
| 116 | |
| 117 | /* |
| 118 | * There are two ways to poll status |
| 119 | * 1. directy call read_xxx method, without any arguments passed in |
| 120 | * 2. call write_xxx method, with arguments passed in, you need |
| 121 | * the result is saved in acpi_polling_hotkey.poll_result. |
| 122 | * anthoer read command through polling interface. |
| 123 | * |
| 124 | */ |
| 125 | |
| 126 | /* polling based hotkey */ |
| 127 | struct acpi_polling_hotkey { |
| 128 | struct acpi_hotkey_link hotkey_link; |
| 129 | int flag; |
| 130 | acpi_handle poll_handle; /* acpi handle attached polling method */ |
| 131 | char *poll_method; /* poll method */ |
| 132 | acpi_handle action_handle; /* acpi handle attached action method */ |
| 133 | char *action_method; /* action method */ |
| 134 | void *poll_result; /* polling_result */ |
| 135 | struct proc_dir_entry *proc; |
| 136 | }; |
| 137 | |
| 138 | /* hotkey object union */ |
| 139 | union acpi_hotkey { |
| 140 | struct list_head entries; |
| 141 | struct acpi_hotkey_link link; |
| 142 | struct acpi_event_hotkey event_hotkey; |
| 143 | struct acpi_polling_hotkey poll_hotkey; |
| 144 | }; |
| 145 | |
| 146 | /* hotkey object list */ |
| 147 | struct acpi_hotkey_list { |
| 148 | struct list_head *entries; |
| 149 | int count; |
| 150 | }; |
| 151 | |
| 152 | static int auto_hotkey_add(struct acpi_device *device); |
| 153 | static int auto_hotkey_remove(struct acpi_device *device, int type); |
| 154 | |
| 155 | static struct acpi_driver hotkey_driver = { |
| 156 | .name = ACPI_HOTK_NAME, |
| 157 | .class = ACPI_HOTK_CLASS, |
| 158 | .ids = ACPI_HOTK_HID, |
| 159 | .ops = { |
| 160 | .add = auto_hotkey_add, |
| 161 | .remove = auto_hotkey_remove, |
| 162 | }, |
| 163 | }; |
| 164 | |
| 165 | static int hotkey_open_config(struct inode *inode, struct file *file); |
| 166 | static ssize_t hotkey_write_config(struct file *file, |
| 167 | const char __user * buffer, |
| 168 | size_t count, loff_t * data); |
| 169 | static ssize_t hotkey_write_poll_config(struct file *file, |
| 170 | const char __user * buffer, |
| 171 | size_t count, loff_t * data); |
| 172 | static int hotkey_info_open_fs(struct inode *inode, struct file *file); |
| 173 | static int hotkey_action_open_fs(struct inode *inode, struct file *file); |
| 174 | static ssize_t hotkey_execute_aml_method(struct file *file, |
| 175 | const char __user * buffer, |
| 176 | size_t count, loff_t * data); |
| 177 | static int hotkey_config_seq_show(struct seq_file *seq, void *offset); |
| 178 | static int hotkey_polling_open_fs(struct inode *inode, struct file *file); |
| 179 | |
| 180 | /* event based config */ |
| 181 | static struct file_operations hotkey_config_fops = { |
| 182 | .open = hotkey_open_config, |
| 183 | .read = seq_read, |
| 184 | .write = hotkey_write_config, |
| 185 | .llseek = seq_lseek, |
| 186 | .release = single_release, |
| 187 | }; |
| 188 | |
| 189 | /* polling based config */ |
| 190 | static struct file_operations hotkey_poll_config_fops = { |
| 191 | .open = hotkey_open_config, |
| 192 | .read = seq_read, |
| 193 | .write = hotkey_write_poll_config, |
| 194 | .llseek = seq_lseek, |
| 195 | .release = single_release, |
| 196 | }; |
| 197 | |
| 198 | /* hotkey driver info */ |
| 199 | static struct file_operations hotkey_info_fops = { |
| 200 | .open = hotkey_info_open_fs, |
| 201 | .read = seq_read, |
| 202 | .llseek = seq_lseek, |
| 203 | .release = single_release, |
| 204 | }; |
| 205 | |
| 206 | /* action */ |
| 207 | static struct file_operations hotkey_action_fops = { |
| 208 | .open = hotkey_action_open_fs, |
| 209 | .read = seq_read, |
| 210 | .write = hotkey_execute_aml_method, |
| 211 | .llseek = seq_lseek, |
| 212 | .release = single_release, |
| 213 | }; |
| 214 | |
| 215 | /* polling results */ |
| 216 | static struct file_operations hotkey_polling_fops = { |
| 217 | .open = hotkey_polling_open_fs, |
| 218 | .read = seq_read, |
| 219 | .llseek = seq_lseek, |
| 220 | .release = single_release, |
| 221 | }; |
| 222 | |
| 223 | struct acpi_hotkey_list global_hotkey_list; /* link all ev or pl hotkey */ |
| 224 | struct list_head hotkey_entries; /* head of the list of hotkey_list */ |
| 225 | |
| 226 | static int hotkey_info_seq_show(struct seq_file *seq, void *offset) |
| 227 | { |
| 228 | ACPI_FUNCTION_TRACE("hotkey_info_seq_show"); |
| 229 | |
| 230 | seq_printf(seq, "Hotkey generic driver ver: %s", HOTKEY_ACPI_VERSION); |
| 231 | |
| 232 | return_VALUE(0); |
| 233 | } |
| 234 | |
| 235 | static int hotkey_info_open_fs(struct inode *inode, struct file *file) |
| 236 | { |
| 237 | return single_open(file, hotkey_info_seq_show, PDE(inode)->data); |
| 238 | } |
| 239 | |
| 240 | static char *format_result(union acpi_object *object) |
| 241 | { |
| 242 | char *buf = (char *)kmalloc(sizeof(union acpi_object), GFP_KERNEL); |
| 243 | |
| 244 | memset(buf, 0, sizeof(union acpi_object)); |
| 245 | |
| 246 | /* Now, just support integer type */ |
| 247 | if (object->type == ACPI_TYPE_INTEGER) |
| 248 | sprintf(buf, "%d", (u32) object->integer.value); |
| 249 | |
| 250 | return buf; |
| 251 | } |
| 252 | |
| 253 | static int hotkey_polling_seq_show(struct seq_file *seq, void *offset) |
| 254 | { |
| 255 | struct acpi_polling_hotkey *poll_hotkey = |
| 256 | (struct acpi_polling_hotkey *)seq->private; |
| 257 | |
| 258 | ACPI_FUNCTION_TRACE("hotkey_polling_seq_show"); |
| 259 | |
| 260 | if (poll_hotkey->poll_result) |
| 261 | seq_printf(seq, "%s", format_result(poll_hotkey->poll_result)); |
| 262 | |
| 263 | return_VALUE(0); |
| 264 | } |
| 265 | |
| 266 | static int hotkey_polling_open_fs(struct inode *inode, struct file *file) |
| 267 | { |
| 268 | return single_open(file, hotkey_polling_seq_show, PDE(inode)->data); |
| 269 | } |
| 270 | |
| 271 | static int hotkey_action_open_fs(struct inode *inode, struct file *file) |
| 272 | { |
| 273 | return single_open(file, hotkey_info_seq_show, PDE(inode)->data); |
| 274 | } |
| 275 | |
| 276 | /* Mapping external hotkey number to standardized hotkey event num */ |
| 277 | static int hotkey_get_internal_event(int event, struct acpi_hotkey_list *list) |
| 278 | { |
| 279 | struct list_head *entries, *next; |
| 280 | int val = 0; |
| 281 | |
| 282 | ACPI_FUNCTION_TRACE("hotkey_get_internal_event"); |
| 283 | |
| 284 | list_for_each_safe(entries, next, list->entries) { |
| 285 | union acpi_hotkey *key = |
| 286 | container_of(entries, union acpi_hotkey, entries); |
| 287 | if (key->link.hotkey_type == ACPI_HOTKEY_EVENT |
| 288 | && key->event_hotkey.external_hotkey_num == event) |
| 289 | val = key->link.hotkey_standard_num; |
| 290 | else |
| 291 | val = -1; |
| 292 | } |
| 293 | |
| 294 | return_VALUE(val); |
| 295 | } |
| 296 | |
| 297 | static void |
| 298 | acpi_hotkey_notify_handler(acpi_handle handle, u32 event, void *data) |
| 299 | { |
| 300 | struct acpi_device *device = NULL; |
| 301 | u32 internal_event; |
| 302 | |
| 303 | ACPI_FUNCTION_TRACE("acpi_hotkey_notify_handler"); |
| 304 | |
| 305 | if (acpi_bus_get_device(handle, &device)) |
| 306 | return_VOID; |
| 307 | |
| 308 | internal_event = hotkey_get_internal_event(event, &global_hotkey_list); |
| 309 | acpi_bus_generate_event(device, event, 0); |
| 310 | |
| 311 | return_VOID; |
| 312 | } |
| 313 | |
| 314 | /* Need to invent automatically hotkey add method */ |
| 315 | static int auto_hotkey_add(struct acpi_device *device) |
| 316 | { |
| 317 | /* Implement me */ |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | /* Need to invent automatically hotkey remove method */ |
| 322 | static int auto_hotkey_remove(struct acpi_device *device, int type) |
| 323 | { |
| 324 | /* Implement me */ |
| 325 | return 0; |
| 326 | } |
| 327 | |
| 328 | /* Create a proc file for each polling method */ |
| 329 | static int create_polling_proc(union acpi_hotkey *device) |
| 330 | { |
| 331 | struct proc_dir_entry *proc; |
Andrew Morton | 8de7a63 | 2005-03-30 22:53:30 -0500 | [diff] [blame] | 332 | mode_t mode; |
Luming Yu | fb9802f | 2005-03-18 18:03:45 -0500 | [diff] [blame] | 333 | |
| 334 | ACPI_FUNCTION_TRACE("create_polling_proc"); |
Andrew Morton | 8de7a63 | 2005-03-30 22:53:30 -0500 | [diff] [blame] | 335 | mode = S_IFREG | S_IRUGO | S_IWUGO; |
Luming Yu | fb9802f | 2005-03-18 18:03:45 -0500 | [diff] [blame] | 336 | |
| 337 | proc = create_proc_entry(device->poll_hotkey.action_method, |
| 338 | mode, hotkey_proc_dir); |
| 339 | |
| 340 | if (!proc) { |
| 341 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 342 | "Hotkey: Unable to create %s entry\n", |
| 343 | device->poll_hotkey.poll_method)); |
| 344 | return_VALUE(-ENODEV); |
| 345 | } else { |
| 346 | proc->proc_fops = &hotkey_polling_fops; |
| 347 | proc->owner = THIS_MODULE; |
| 348 | proc->data = device; |
| 349 | proc->uid = 0; |
| 350 | proc->gid = 0; |
| 351 | device->poll_hotkey.proc = proc; |
| 352 | } |
| 353 | return_VALUE(0); |
| 354 | } |
| 355 | |
| 356 | static int is_valid_acpi_path(const char *pathname) |
| 357 | { |
| 358 | acpi_handle handle; |
| 359 | acpi_status status; |
| 360 | ACPI_FUNCTION_TRACE("is_valid_acpi_path"); |
| 361 | |
| 362 | status = acpi_get_handle(NULL, (char *)pathname, &handle); |
| 363 | return_VALUE(!ACPI_FAILURE(status)); |
| 364 | } |
| 365 | |
| 366 | static int is_valid_hotkey(union acpi_hotkey *device) |
| 367 | { |
| 368 | ACPI_FUNCTION_TRACE("is_valid_hotkey"); |
| 369 | /* Implement valid check */ |
| 370 | return_VALUE(1); |
| 371 | } |
| 372 | |
| 373 | static int hotkey_add(union acpi_hotkey *device) |
| 374 | { |
| 375 | int status = 0; |
| 376 | struct acpi_device *dev = NULL; |
| 377 | |
| 378 | ACPI_FUNCTION_TRACE("hotkey_add"); |
| 379 | |
| 380 | if (device->link.hotkey_type == ACPI_HOTKEY_EVENT) { |
| 381 | status = |
| 382 | acpi_bus_get_device(device->event_hotkey.bus_handle, &dev); |
| 383 | if (status) |
| 384 | return_VALUE(status); |
| 385 | |
| 386 | status = acpi_install_notify_handler(dev->handle, |
| 387 | ACPI_SYSTEM_NOTIFY, |
| 388 | acpi_hotkey_notify_handler, |
| 389 | device); |
| 390 | } else /* Add polling hotkey */ |
| 391 | create_polling_proc(device); |
| 392 | |
| 393 | global_hotkey_list.count++; |
| 394 | |
| 395 | list_add_tail(&device->link.entries, global_hotkey_list.entries); |
| 396 | |
| 397 | return_VALUE(status); |
| 398 | } |
| 399 | |
| 400 | static int hotkey_remove(union acpi_hotkey *device) |
| 401 | { |
| 402 | struct list_head *entries, *next; |
| 403 | |
| 404 | ACPI_FUNCTION_TRACE("hotkey_remove"); |
| 405 | |
| 406 | list_for_each_safe(entries, next, global_hotkey_list.entries) { |
| 407 | union acpi_hotkey *key = |
| 408 | container_of(entries, union acpi_hotkey, entries); |
| 409 | if (key->link.hotkey_standard_num == |
| 410 | device->link.hotkey_standard_num) { |
| 411 | list_del(&key->link.entries); |
| 412 | remove_proc_entry(key->poll_hotkey.action_method, |
| 413 | hotkey_proc_dir); |
| 414 | global_hotkey_list.count--; |
| 415 | break; |
| 416 | } |
| 417 | } |
| 418 | return_VALUE(0); |
| 419 | } |
| 420 | |
| 421 | static void hotkey_update(union acpi_hotkey *key) |
| 422 | { |
| 423 | struct list_head *entries, *next; |
| 424 | |
| 425 | ACPI_FUNCTION_TRACE("hotkey_update"); |
| 426 | |
| 427 | list_for_each_safe(entries, next, global_hotkey_list.entries) { |
| 428 | union acpi_hotkey *key = |
| 429 | container_of(entries, union acpi_hotkey, entries); |
| 430 | if (key->link.hotkey_standard_num == |
| 431 | key->link.hotkey_standard_num) { |
| 432 | key->event_hotkey.bus_handle = |
| 433 | key->event_hotkey.bus_handle; |
| 434 | key->event_hotkey.external_hotkey_num = |
| 435 | key->event_hotkey.external_hotkey_num; |
| 436 | key->event_hotkey.action_handle = |
| 437 | key->event_hotkey.action_handle; |
| 438 | key->event_hotkey.action_method = |
| 439 | key->event_hotkey.action_method; |
| 440 | break; |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | return_VOID; |
| 445 | } |
| 446 | |
| 447 | static void free_hotkey_device(union acpi_hotkey *key) |
| 448 | { |
| 449 | struct acpi_device *dev; |
| 450 | int status; |
| 451 | |
| 452 | ACPI_FUNCTION_TRACE("free_hotkey_device"); |
| 453 | |
| 454 | if (key->link.hotkey_type == ACPI_HOTKEY_EVENT) { |
| 455 | status = |
| 456 | acpi_bus_get_device(key->event_hotkey.bus_handle, &dev); |
| 457 | if (dev->handle) |
| 458 | acpi_remove_notify_handler(dev->handle, |
| 459 | ACPI_SYSTEM_NOTIFY, |
| 460 | acpi_hotkey_notify_handler); |
| 461 | } else |
| 462 | remove_proc_entry(key->poll_hotkey.action_method, |
| 463 | hotkey_proc_dir); |
| 464 | kfree(key); |
| 465 | return_VOID; |
| 466 | } |
| 467 | |
| 468 | static int |
| 469 | init_hotkey_device(union acpi_hotkey *key, char *bus_str, char *action_str, |
| 470 | char *method, int std_num, int external_num) |
| 471 | { |
| 472 | ACPI_FUNCTION_TRACE("init_hotkey_device"); |
| 473 | |
| 474 | key->link.hotkey_type = ACPI_HOTKEY_EVENT; |
| 475 | key->link.hotkey_standard_num = std_num; |
| 476 | key->event_hotkey.flag = 0; |
| 477 | if (is_valid_acpi_path(bus_str)) |
| 478 | acpi_get_handle((acpi_handle) 0, |
| 479 | bus_str, &(key->event_hotkey.bus_handle)); |
| 480 | else |
| 481 | return_VALUE(-ENODEV); |
| 482 | key->event_hotkey.external_hotkey_num = external_num; |
| 483 | if (is_valid_acpi_path(action_str)) |
| 484 | acpi_get_handle((acpi_handle) 0, |
| 485 | action_str, &(key->event_hotkey.action_handle)); |
| 486 | key->event_hotkey.action_method = kmalloc(sizeof(method), GFP_KERNEL); |
| 487 | strcpy(key->event_hotkey.action_method, method); |
| 488 | |
| 489 | return_VALUE(!is_valid_hotkey(key)); |
| 490 | } |
| 491 | |
| 492 | static int |
| 493 | init_poll_hotkey_device(union acpi_hotkey *key, |
| 494 | char *poll_str, |
| 495 | char *poll_method, |
| 496 | char *action_str, char *action_method, int std_num) |
| 497 | { |
| 498 | ACPI_FUNCTION_TRACE("init_poll_hotkey_device"); |
| 499 | |
| 500 | key->link.hotkey_type = ACPI_HOTKEY_POLLING; |
| 501 | key->link.hotkey_standard_num = std_num; |
| 502 | key->poll_hotkey.flag = 0; |
| 503 | if (is_valid_acpi_path(poll_str)) |
| 504 | acpi_get_handle((acpi_handle) 0, |
| 505 | poll_str, &(key->poll_hotkey.poll_handle)); |
| 506 | else |
| 507 | return_VALUE(-ENODEV); |
| 508 | key->poll_hotkey.poll_method = poll_method; |
| 509 | if (is_valid_acpi_path(action_str)) |
| 510 | acpi_get_handle((acpi_handle) 0, |
| 511 | action_str, &(key->poll_hotkey.action_handle)); |
| 512 | key->poll_hotkey.action_method = |
| 513 | kmalloc(sizeof(action_method), GFP_KERNEL); |
| 514 | strcpy(key->poll_hotkey.action_method, action_method); |
| 515 | key->poll_hotkey.poll_result = |
| 516 | (union acpi_object *)kmalloc(sizeof(union acpi_object), GFP_KERNEL); |
| 517 | return_VALUE(is_valid_hotkey(key)); |
| 518 | } |
| 519 | |
| 520 | static int check_hotkey_valid(union acpi_hotkey *key, |
| 521 | struct acpi_hotkey_list *list) |
| 522 | { |
| 523 | ACPI_FUNCTION_TRACE("check_hotkey_valid"); |
| 524 | return_VALUE(0); |
| 525 | } |
| 526 | |
| 527 | static int hotkey_open_config(struct inode *inode, struct file *file) |
| 528 | { |
| 529 | ACPI_FUNCTION_TRACE("hotkey_open_config"); |
| 530 | return_VALUE(single_open |
| 531 | (file, hotkey_config_seq_show, PDE(inode)->data)); |
| 532 | } |
| 533 | |
| 534 | static int hotkey_config_seq_show(struct seq_file *seq, void *offset) |
| 535 | { |
| 536 | struct acpi_hotkey_list *hotkey_list = &global_hotkey_list; |
| 537 | struct list_head *entries, *next; |
| 538 | char bus_name[ACPI_PATHNAME_MAX] = { 0 }; |
| 539 | char action_name[ACPI_PATHNAME_MAX] = { 0 }; |
| 540 | struct acpi_buffer bus = { ACPI_PATHNAME_MAX, bus_name }; |
| 541 | struct acpi_buffer act = { ACPI_PATHNAME_MAX, action_name }; |
| 542 | |
| 543 | ACPI_FUNCTION_TRACE(("hotkey_config_seq_show")); |
| 544 | |
| 545 | if (!hotkey_list) |
| 546 | goto end; |
| 547 | |
| 548 | list_for_each_safe(entries, next, hotkey_list->entries) { |
| 549 | union acpi_hotkey *key = |
| 550 | container_of(entries, union acpi_hotkey, entries); |
| 551 | if (key->link.hotkey_type == ACPI_HOTKEY_EVENT) { |
| 552 | acpi_get_name(key->event_hotkey.bus_handle, |
| 553 | ACPI_NAME_TYPE_MAX, &bus); |
| 554 | acpi_get_name(key->event_hotkey.action_handle, |
| 555 | ACPI_NAME_TYPE_MAX, &act); |
| 556 | seq_printf(seq, "%s:%s:%s:%d:%d", bus_name, |
| 557 | action_name, |
| 558 | key->event_hotkey.action_method, |
| 559 | key->link.hotkey_standard_num, |
| 560 | key->event_hotkey.external_hotkey_num); |
| 561 | } /* ACPI_HOTKEY_POLLING */ |
| 562 | else { |
| 563 | acpi_get_name(key->poll_hotkey.poll_handle, |
| 564 | ACPI_NAME_TYPE_MAX, &bus); |
| 565 | acpi_get_name(key->poll_hotkey.action_handle, |
| 566 | ACPI_NAME_TYPE_MAX, &act); |
| 567 | seq_printf(seq, "%s:%s:%s:%s:%d", bus_name, |
| 568 | key->poll_hotkey.poll_method, |
| 569 | action_name, |
| 570 | key->poll_hotkey.action_method, |
| 571 | key->link.hotkey_standard_num); |
| 572 | } |
| 573 | } |
| 574 | seq_puts(seq, "\n"); |
| 575 | end: |
| 576 | return_VALUE(0); |
| 577 | } |
| 578 | |
| 579 | static int |
| 580 | get_parms(char *config_record, |
| 581 | int *cmd, |
| 582 | char *bus_handle, |
| 583 | char *bus_method, |
| 584 | char *action_handle, |
| 585 | char *method, int *internal_event_num, int *external_event_num) |
| 586 | { |
| 587 | char *tmp, *tmp1; |
| 588 | ACPI_FUNCTION_TRACE(("get_parms")); |
| 589 | |
| 590 | sscanf(config_record, "%d", cmd); |
| 591 | |
| 592 | tmp = strchr(config_record, ':'); |
| 593 | tmp++; |
| 594 | tmp1 = strchr(tmp, ':'); |
| 595 | strncpy(bus_handle, tmp, tmp1 - tmp); |
| 596 | bus_handle[tmp1 - tmp] = 0; |
| 597 | |
| 598 | tmp = tmp1; |
| 599 | tmp++; |
| 600 | tmp1 = strchr(tmp, ':'); |
| 601 | strncpy(bus_method, tmp, tmp1 - tmp); |
| 602 | bus_method[tmp1 - tmp] = 0; |
| 603 | |
| 604 | tmp = tmp1; |
| 605 | tmp++; |
| 606 | tmp1 = strchr(tmp, ':'); |
| 607 | strncpy(action_handle, tmp, tmp1 - tmp); |
| 608 | action_handle[tmp1 - tmp] = 0; |
| 609 | |
| 610 | tmp = tmp1; |
| 611 | tmp++; |
| 612 | tmp1 = strchr(tmp, ':'); |
| 613 | strncpy(method, tmp, tmp1 - tmp); |
| 614 | method[tmp1 - tmp] = 0; |
| 615 | |
| 616 | sscanf(tmp1 + 1, "%d:%d", internal_event_num, external_event_num); |
| 617 | return_VALUE(6); |
| 618 | } |
| 619 | |
| 620 | /* count is length for one input record */ |
| 621 | static ssize_t hotkey_write_config(struct file *file, |
| 622 | const char __user * buffer, |
| 623 | size_t count, loff_t * data) |
| 624 | { |
| 625 | struct acpi_hotkey_list *hotkey_list = &global_hotkey_list; |
| 626 | char config_record[MAX_CONFIG_RECORD_LEN]; |
| 627 | char bus_handle[MAX_NAME_PATH_LEN]; |
| 628 | char bus_method[MAX_NAME_PATH_LEN]; |
| 629 | char action_handle[MAX_NAME_PATH_LEN]; |
| 630 | char method[20]; |
| 631 | int cmd, internal_event_num, external_event_num; |
| 632 | int ret = 0; |
| 633 | union acpi_hotkey *key = NULL; |
| 634 | |
| 635 | ACPI_FUNCTION_TRACE(("hotkey_write_config")); |
| 636 | |
| 637 | if (!hotkey_list || count > MAX_CONFIG_RECORD_LEN) { |
| 638 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid arguments\n")); |
| 639 | return_VALUE(-EINVAL); |
| 640 | } |
| 641 | |
| 642 | if (copy_from_user(config_record, buffer, count)) { |
| 643 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data \n")); |
| 644 | return_VALUE(-EINVAL); |
| 645 | } |
| 646 | config_record[count] = '\0'; |
| 647 | |
| 648 | ret = get_parms(config_record, |
| 649 | &cmd, |
| 650 | bus_handle, |
| 651 | bus_method, |
| 652 | action_handle, |
| 653 | method, &internal_event_num, &external_event_num); |
| 654 | if (ret != 6) { |
| 655 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 656 | "Invalid data format ret=%d\n", ret)); |
| 657 | return_VALUE(-EINVAL); |
| 658 | } |
| 659 | |
| 660 | key = kmalloc(sizeof(union acpi_hotkey), GFP_KERNEL); |
| 661 | ret = init_hotkey_device(key, bus_handle, action_handle, method, |
| 662 | internal_event_num, external_event_num); |
| 663 | |
| 664 | if (ret || check_hotkey_valid(key, hotkey_list)) { |
| 665 | kfree(key); |
| 666 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid hotkey \n")); |
| 667 | return_VALUE(-EINVAL); |
| 668 | } |
| 669 | switch (cmd) { |
| 670 | case 0: |
| 671 | hotkey_add(key); |
| 672 | break; |
| 673 | case 1: |
| 674 | hotkey_remove(key); |
| 675 | free_hotkey_device(key); |
| 676 | break; |
| 677 | case 2: |
| 678 | hotkey_update(key); |
| 679 | break; |
| 680 | default: |
| 681 | break; |
| 682 | } |
| 683 | return_VALUE(count); |
| 684 | } |
| 685 | |
| 686 | /* count is length for one input record */ |
| 687 | static ssize_t hotkey_write_poll_config(struct file *file, |
| 688 | const char __user * buffer, |
| 689 | size_t count, loff_t * data) |
| 690 | { |
| 691 | struct seq_file *m = (struct seq_file *)file->private_data; |
| 692 | struct acpi_hotkey_list *hotkey_list = |
| 693 | (struct acpi_hotkey_list *)m->private; |
| 694 | |
| 695 | char config_record[MAX_CONFIG_RECORD_LEN]; |
| 696 | char polling_handle[MAX_NAME_PATH_LEN]; |
| 697 | char action_handle[MAX_NAME_PATH_LEN]; |
| 698 | char poll_method[20], action_method[20]; |
| 699 | int ret, internal_event_num, cmd, external_event_num; |
| 700 | union acpi_hotkey *key = NULL; |
| 701 | |
| 702 | ACPI_FUNCTION_TRACE("hotkey_write_poll_config"); |
| 703 | |
| 704 | if (!hotkey_list || count > MAX_CONFIG_RECORD_LEN) { |
| 705 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid arguments\n")); |
| 706 | return_VALUE(-EINVAL); |
| 707 | } |
| 708 | |
| 709 | if (copy_from_user(config_record, buffer, count)) { |
| 710 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data \n")); |
| 711 | return_VALUE(-EINVAL); |
| 712 | } |
| 713 | config_record[count] = '\0'; |
| 714 | |
| 715 | ret = get_parms(config_record, |
| 716 | &cmd, |
| 717 | polling_handle, |
| 718 | poll_method, |
| 719 | action_handle, |
| 720 | action_method, |
| 721 | &internal_event_num, &external_event_num); |
| 722 | |
| 723 | if (ret != 6) { |
| 724 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data format\n")); |
| 725 | return_VALUE(-EINVAL); |
| 726 | } |
| 727 | |
| 728 | key = kmalloc(sizeof(union acpi_hotkey), GFP_KERNEL); |
| 729 | ret = init_poll_hotkey_device(key, polling_handle, poll_method, |
| 730 | action_handle, action_method, |
| 731 | internal_event_num); |
| 732 | if (ret || check_hotkey_valid(key, hotkey_list)) { |
| 733 | kfree(key); |
| 734 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid hotkey \n")); |
| 735 | return_VALUE(-EINVAL); |
| 736 | } |
| 737 | switch (cmd) { |
| 738 | case 0: |
| 739 | hotkey_add(key); |
| 740 | break; |
| 741 | case 1: |
| 742 | hotkey_remove(key); |
| 743 | break; |
| 744 | case 2: |
| 745 | hotkey_update(key); |
| 746 | break; |
| 747 | default: |
| 748 | break; |
| 749 | } |
| 750 | return_VALUE(count); |
| 751 | } |
| 752 | |
| 753 | /* |
| 754 | * This function evaluates an ACPI method, given an int as parameter, the |
| 755 | * method is searched within the scope of the handle, can be NULL. The output |
| 756 | * of the method is written is output, which can also be NULL |
| 757 | * |
| 758 | * returns 1 if write is successful, 0 else. |
| 759 | */ |
| 760 | static int write_acpi_int(acpi_handle handle, const char *method, int val, |
| 761 | struct acpi_buffer *output) |
| 762 | { |
| 763 | struct acpi_object_list params; /* list of input parameters (an int here) */ |
| 764 | union acpi_object in_obj; /* the only param we use */ |
| 765 | acpi_status status; |
| 766 | |
| 767 | ACPI_FUNCTION_TRACE("write_acpi_int"); |
| 768 | params.count = 1; |
| 769 | params.pointer = &in_obj; |
| 770 | in_obj.type = ACPI_TYPE_INTEGER; |
| 771 | in_obj.integer.value = val; |
| 772 | |
| 773 | status = acpi_evaluate_object(handle, (char *)method, ¶ms, output); |
| 774 | |
| 775 | return_VALUE(status == AE_OK); |
| 776 | } |
| 777 | |
| 778 | static int read_acpi_int(acpi_handle handle, const char *method, int *val) |
| 779 | { |
| 780 | struct acpi_buffer output; |
| 781 | union acpi_object out_obj; |
| 782 | acpi_status status; |
| 783 | |
| 784 | ACPI_FUNCTION_TRACE("read_acpi_int"); |
| 785 | output.length = sizeof(out_obj); |
| 786 | output.pointer = &out_obj; |
| 787 | |
| 788 | status = acpi_evaluate_object(handle, (char *)method, NULL, &output); |
| 789 | *val = out_obj.integer.value; |
| 790 | return_VALUE((status == AE_OK) |
| 791 | && (out_obj.type == ACPI_TYPE_INTEGER)); |
| 792 | } |
| 793 | |
| 794 | static acpi_handle |
| 795 | get_handle_from_hotkeylist(struct acpi_hotkey_list *hotkey_list, int event_num) |
| 796 | { |
| 797 | struct list_head *entries, *next; |
| 798 | |
| 799 | list_for_each_safe(entries, next, hotkey_list->entries) { |
| 800 | union acpi_hotkey *key = |
| 801 | container_of(entries, union acpi_hotkey, entries); |
| 802 | if (key->link.hotkey_type == ACPI_HOTKEY_EVENT |
| 803 | && key->link.hotkey_standard_num == event_num) { |
| 804 | return (key->event_hotkey.action_handle); |
| 805 | } |
| 806 | } |
| 807 | return (NULL); |
| 808 | } |
| 809 | |
| 810 | static |
| 811 | char *get_method_from_hotkeylist(struct acpi_hotkey_list *hotkey_list, |
| 812 | int event_num) |
| 813 | { |
| 814 | struct list_head *entries, *next; |
| 815 | |
| 816 | list_for_each_safe(entries, next, hotkey_list->entries) { |
| 817 | union acpi_hotkey *key = |
| 818 | container_of(entries, union acpi_hotkey, entries); |
| 819 | |
| 820 | if (key->link.hotkey_type == ACPI_HOTKEY_EVENT && |
| 821 | key->link.hotkey_standard_num == event_num) |
| 822 | return (key->event_hotkey.action_method); |
| 823 | } |
| 824 | return (NULL); |
| 825 | } |
| 826 | |
| 827 | static struct acpi_polling_hotkey *get_hotkey_by_event(struct |
| 828 | acpi_hotkey_list |
| 829 | *hotkey_list, int event) |
| 830 | { |
| 831 | struct list_head *entries, *next; |
| 832 | |
| 833 | list_for_each_safe(entries, next, hotkey_list->entries) { |
| 834 | union acpi_hotkey *key = |
| 835 | container_of(entries, union acpi_hotkey, entries); |
| 836 | if (key->link.hotkey_type == ACPI_HOTKEY_POLLING |
| 837 | && key->link.hotkey_standard_num == event) { |
| 838 | return (&key->poll_hotkey); |
| 839 | } |
| 840 | } |
| 841 | return (NULL); |
| 842 | } |
| 843 | |
| 844 | /* |
| 845 | * user call AML method interface: |
| 846 | * Call convention: |
| 847 | * echo "event_num: arg type : value" |
| 848 | * example: echo "1:1:30" > /proc/acpi/action |
| 849 | * Just support 1 integer arg passing to AML method |
| 850 | */ |
| 851 | |
| 852 | static ssize_t hotkey_execute_aml_method(struct file *file, |
| 853 | const char __user * buffer, |
| 854 | size_t count, loff_t * data) |
| 855 | { |
| 856 | struct acpi_hotkey_list *hotkey_list = &global_hotkey_list; |
| 857 | char arg[MAX_CALL_PARM]; |
| 858 | int event, type, value; |
| 859 | |
| 860 | char *method; |
| 861 | acpi_handle handle; |
| 862 | |
| 863 | ACPI_FUNCTION_TRACE("hotkey_execte_aml_method"); |
| 864 | |
| 865 | if (!hotkey_list || count > MAX_CALL_PARM) { |
| 866 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument 1")); |
| 867 | return_VALUE(-EINVAL); |
| 868 | } |
| 869 | |
| 870 | if (copy_from_user(arg, buffer, count)) { |
| 871 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument 2")); |
| 872 | return_VALUE(-EINVAL); |
| 873 | } |
| 874 | |
| 875 | arg[count] = '\0'; |
| 876 | |
| 877 | if (sscanf(arg, "%d:%d:%d", &event, &type, &value) != 3) { |
| 878 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument 3")); |
| 879 | return_VALUE(-EINVAL); |
| 880 | } |
| 881 | |
| 882 | if (type == ACPI_TYPE_INTEGER) { |
| 883 | handle = get_handle_from_hotkeylist(hotkey_list, event); |
| 884 | method = (char *)get_method_from_hotkeylist(hotkey_list, event); |
| 885 | if (IS_EVENT(event)) |
| 886 | write_acpi_int(handle, method, value, NULL); |
| 887 | else if (IS_POLL(event)) { |
| 888 | struct acpi_polling_hotkey *key; |
| 889 | key = (struct acpi_polling_hotkey *) |
| 890 | get_hotkey_by_event(hotkey_list, event); |
| 891 | read_acpi_int(handle, method, key->poll_result); |
| 892 | } |
| 893 | } else { |
| 894 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Not supported")); |
| 895 | return_VALUE(-EINVAL); |
| 896 | } |
| 897 | |
| 898 | return_VALUE(count); |
| 899 | } |
| 900 | |
| 901 | static int __init hotkey_init(void) |
| 902 | { |
| 903 | int result; |
| 904 | mode_t mode = S_IFREG | S_IRUGO | S_IWUGO; |
| 905 | |
| 906 | ACPI_FUNCTION_TRACE("hotkey_init"); |
| 907 | |
| 908 | if (acpi_disabled) |
| 909 | return -ENODEV; |
| 910 | |
| 911 | if (acpi_specific_hotkey_enabled) { |
| 912 | printk("Using specific hotkey driver\n"); |
| 913 | return -ENODEV; |
| 914 | } |
| 915 | |
| 916 | hotkey_proc_dir = proc_mkdir(HOTKEY_PROC, acpi_root_dir); |
| 917 | if (!hotkey_proc_dir) { |
| 918 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 919 | "Hotkey: Unable to create %s entry\n", |
| 920 | HOTKEY_PROC)); |
| 921 | return (-ENODEV); |
| 922 | } |
| 923 | hotkey_proc_dir->owner = THIS_MODULE; |
| 924 | |
| 925 | hotkey_config = |
| 926 | create_proc_entry(HOTKEY_EV_CONFIG, mode, hotkey_proc_dir); |
| 927 | if (!hotkey_config) { |
| 928 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 929 | "Hotkey: Unable to create %s entry\n", |
| 930 | HOTKEY_EV_CONFIG)); |
| 931 | return (-ENODEV); |
| 932 | } else { |
| 933 | hotkey_config->proc_fops = &hotkey_config_fops; |
| 934 | hotkey_config->data = &global_hotkey_list; |
| 935 | hotkey_config->owner = THIS_MODULE; |
| 936 | hotkey_config->uid = 0; |
| 937 | hotkey_config->gid = 0; |
| 938 | } |
| 939 | |
| 940 | hotkey_poll_config = |
| 941 | create_proc_entry(HOTKEY_PL_CONFIG, mode, hotkey_proc_dir); |
| 942 | if (!hotkey_poll_config) { |
| 943 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 944 | "Hotkey: Unable to create %s entry\n", |
| 945 | HOTKEY_EV_CONFIG)); |
| 946 | return (-ENODEV); |
| 947 | } else { |
| 948 | hotkey_poll_config->proc_fops = &hotkey_poll_config_fops; |
| 949 | hotkey_poll_config->data = &global_hotkey_list; |
| 950 | hotkey_poll_config->owner = THIS_MODULE; |
| 951 | hotkey_poll_config->uid = 0; |
| 952 | hotkey_poll_config->gid = 0; |
| 953 | } |
| 954 | |
| 955 | hotkey_action = create_proc_entry(HOTKEY_ACTION, mode, hotkey_proc_dir); |
| 956 | if (!hotkey_action) { |
| 957 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 958 | "Hotkey: Unable to create %s entry\n", |
| 959 | HOTKEY_ACTION)); |
| 960 | return (-ENODEV); |
| 961 | } else { |
| 962 | hotkey_action->proc_fops = &hotkey_action_fops; |
| 963 | hotkey_action->owner = THIS_MODULE; |
| 964 | hotkey_action->uid = 0; |
| 965 | hotkey_action->gid = 0; |
| 966 | } |
| 967 | |
| 968 | hotkey_info = create_proc_entry(HOTKEY_INFO, mode, hotkey_proc_dir); |
| 969 | if (!hotkey_info) { |
| 970 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 971 | "Hotkey: Unable to create %s entry\n", |
| 972 | HOTKEY_INFO)); |
| 973 | return (-ENODEV); |
| 974 | } else { |
| 975 | hotkey_info->proc_fops = &hotkey_info_fops; |
| 976 | hotkey_info->owner = THIS_MODULE; |
| 977 | hotkey_info->uid = 0; |
| 978 | hotkey_info->gid = 0; |
| 979 | } |
| 980 | |
| 981 | result = acpi_bus_register_driver(&hotkey_driver); |
| 982 | if (result < 0) { |
| 983 | remove_proc_entry(HOTKEY_PROC, acpi_root_dir); |
| 984 | return (-ENODEV); |
| 985 | } |
| 986 | global_hotkey_list.count = 0; |
| 987 | global_hotkey_list.entries = &hotkey_entries; |
| 988 | |
| 989 | INIT_LIST_HEAD(&hotkey_entries); |
| 990 | |
| 991 | return (0); |
| 992 | } |
| 993 | |
| 994 | static void __exit hotkey_exit(void) |
| 995 | { |
| 996 | struct list_head *entries, *next; |
| 997 | |
| 998 | ACPI_FUNCTION_TRACE("hotkey_remove"); |
| 999 | |
| 1000 | list_for_each_safe(entries, next, global_hotkey_list.entries) { |
| 1001 | union acpi_hotkey *key = |
| 1002 | container_of(entries, union acpi_hotkey, entries); |
| 1003 | |
| 1004 | acpi_os_wait_events_complete(NULL); |
| 1005 | list_del(&key->link.entries); |
| 1006 | global_hotkey_list.count--; |
| 1007 | free_hotkey_device(key); |
| 1008 | } |
| 1009 | acpi_bus_unregister_driver(&hotkey_driver); |
| 1010 | remove_proc_entry(HOTKEY_EV_CONFIG, hotkey_proc_dir); |
| 1011 | remove_proc_entry(HOTKEY_PL_CONFIG, hotkey_proc_dir); |
| 1012 | remove_proc_entry(HOTKEY_ACTION, hotkey_proc_dir); |
| 1013 | remove_proc_entry(HOTKEY_INFO, hotkey_proc_dir); |
| 1014 | remove_proc_entry(HOTKEY_PROC, acpi_root_dir); |
| 1015 | return; |
| 1016 | } |
| 1017 | |
| 1018 | module_init(hotkey_init); |
| 1019 | module_exit(hotkey_exit); |