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Merge git://git.infradead.org/jffs2-devel-2.6
[deliverable/linux.git] / drivers / acpi / hotkey.c
1 /*
2 * hotkey.c - ACPI Hotkey Driver ($Revision: 0.2 $)
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 RESULT_STR_LEN 80
55
56 #define ACTION_METHOD 0
57 #define POLL_METHOD 1
58
59 #define IS_EVENT(e) ((e) <= 10000 && (e) >0)
60 #define IS_POLL(e) ((e) > 10000)
61 #define IS_OTHERS(e) ((e)<=0 || (e)>=20000)
62 #define _COMPONENT ACPI_HOTKEY_COMPONENT
63 ACPI_MODULE_NAME("acpi_hotkey")
64
65 MODULE_AUTHOR("luming.yu@intel.com");
66 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
67 MODULE_LICENSE("GPL");
68
69 /* standardized internal hotkey number/event */
70 enum {
71 /* Video Extension event */
72 HK_EVENT_CYCLE_OUTPUT_DEVICE = 0x80,
73 HK_EVENT_OUTPUT_DEVICE_STATUS_CHANGE,
74 HK_EVENT_CYCLE_DISPLAY_OUTPUT,
75 HK_EVENT_NEXT_DISPLAY_OUTPUT,
76 HK_EVENT_PREVIOUS_DISPLAY_OUTPUT,
77 HK_EVENT_CYCLE_BRIGHTNESS,
78 HK_EVENT_INCREASE_BRIGHTNESS,
79 HK_EVENT_DECREASE_BRIGHTNESS,
80 HK_EVENT_ZERO_BRIGHTNESS,
81 HK_EVENT_DISPLAY_DEVICE_OFF,
82
83 /* Snd Card event */
84 HK_EVENT_VOLUME_MUTE,
85 HK_EVENT_VOLUME_INCLREASE,
86 HK_EVENT_VOLUME_DECREASE,
87
88 /* running state control */
89 HK_EVENT_ENTERRING_S3,
90 HK_EVENT_ENTERRING_S4,
91 HK_EVENT_ENTERRING_S5,
92 };
93
94 /* procdir we use */
95 static struct proc_dir_entry *hotkey_proc_dir;
96 static struct proc_dir_entry *hotkey_config;
97 static struct proc_dir_entry *hotkey_poll_config;
98 static struct proc_dir_entry *hotkey_action;
99 static struct proc_dir_entry *hotkey_info;
100
101 /* linkage for all type of hotkey */
102 struct acpi_hotkey_link {
103 struct list_head entries;
104 int hotkey_type; /* event or polling based hotkey */
105 int hotkey_standard_num; /* standardized hotkey(event) number */
106 };
107
108 /* event based hotkey */
109 struct acpi_event_hotkey {
110 struct acpi_hotkey_link hotkey_link;
111 int flag;
112 acpi_handle bus_handle; /* bus to install notify handler */
113 int external_hotkey_num; /* external hotkey/event number */
114 acpi_handle action_handle; /* acpi handle attached aml action method */
115 char *action_method; /* action method */
116 };
117
118 /*
119 * There are two ways to poll status
120 * 1. directy call read_xxx method, without any arguments passed in
121 * 2. call write_xxx method, with arguments passed in, you need
122 * the result is saved in acpi_polling_hotkey.poll_result.
123 * anthoer read command through polling interface.
124 *
125 */
126
127 /* polling based hotkey */
128 struct acpi_polling_hotkey {
129 struct acpi_hotkey_link hotkey_link;
130 int flag;
131 acpi_handle poll_handle; /* acpi handle attached polling method */
132 char *poll_method; /* poll method */
133 acpi_handle action_handle; /* acpi handle attached action method */
134 char *action_method; /* action method */
135 union acpi_object *poll_result; /* polling_result */
136 struct proc_dir_entry *proc;
137 };
138
139 /* hotkey object union */
140 union acpi_hotkey {
141 struct list_head entries;
142 struct acpi_hotkey_link link;
143 struct acpi_event_hotkey event_hotkey;
144 struct acpi_polling_hotkey poll_hotkey;
145 };
146
147 /* hotkey object list */
148 struct acpi_hotkey_list {
149 struct list_head *entries;
150 int count;
151 };
152
153 static int auto_hotkey_add(struct acpi_device *device);
154 static int auto_hotkey_remove(struct acpi_device *device, int type);
155
156 static struct acpi_driver hotkey_driver = {
157 .name = ACPI_HOTK_NAME,
158 .class = ACPI_HOTK_CLASS,
159 .ids = ACPI_HOTK_HID,
160 .ops = {
161 .add = auto_hotkey_add,
162 .remove = auto_hotkey_remove,
163 },
164 };
165
166 static void free_hotkey_device(union acpi_hotkey *key);
167 static void free_hotkey_buffer(union acpi_hotkey *key);
168 static void free_poll_hotkey_buffer(union acpi_hotkey *key);
169 static int hotkey_open_config(struct inode *inode, struct file *file);
170 static int hotkey_poll_open_config(struct inode *inode, struct file *file);
171 static ssize_t hotkey_write_config(struct file *file,
172 const char __user * buffer,
173 size_t count, loff_t * data);
174 static int hotkey_info_open_fs(struct inode *inode, struct file *file);
175 static int hotkey_action_open_fs(struct inode *inode, struct file *file);
176 static ssize_t hotkey_execute_aml_method(struct file *file,
177 const char __user * buffer,
178 size_t count, loff_t * data);
179 static int hotkey_config_seq_show(struct seq_file *seq, void *offset);
180 static int hotkey_poll_config_seq_show(struct seq_file *seq, void *offset);
181 static int hotkey_polling_open_fs(struct inode *inode, struct file *file);
182 static union acpi_hotkey *get_hotkey_by_event(struct
183 acpi_hotkey_list
184 *hotkey_list, int event);
185
186 /* event based config */
187 static struct file_operations hotkey_config_fops = {
188 .open = hotkey_open_config,
189 .read = seq_read,
190 .write = hotkey_write_config,
191 .llseek = seq_lseek,
192 .release = single_release,
193 };
194
195 /* polling based config */
196 static struct file_operations hotkey_poll_config_fops = {
197 .open = hotkey_poll_open_config,
198 .read = seq_read,
199 .write = hotkey_write_config,
200 .llseek = seq_lseek,
201 .release = single_release,
202 };
203
204 /* hotkey driver info */
205 static struct file_operations hotkey_info_fops = {
206 .open = hotkey_info_open_fs,
207 .read = seq_read,
208 .llseek = seq_lseek,
209 .release = single_release,
210 };
211
212 /* action */
213 static struct file_operations hotkey_action_fops = {
214 .open = hotkey_action_open_fs,
215 .read = seq_read,
216 .write = hotkey_execute_aml_method,
217 .llseek = seq_lseek,
218 .release = single_release,
219 };
220
221 /* polling results */
222 static struct file_operations hotkey_polling_fops = {
223 .open = hotkey_polling_open_fs,
224 .read = seq_read,
225 .llseek = seq_lseek,
226 .release = single_release,
227 };
228
229 struct acpi_hotkey_list global_hotkey_list; /* link all ev or pl hotkey */
230 struct list_head hotkey_entries; /* head of the list of hotkey_list */
231
232 static int hotkey_info_seq_show(struct seq_file *seq, void *offset)
233 {
234 ACPI_FUNCTION_TRACE("hotkey_info_seq_show");
235
236 seq_printf(seq, "Hotkey generic driver ver: %s\n", HOTKEY_ACPI_VERSION);
237
238 return_VALUE(0);
239 }
240
241 static int hotkey_info_open_fs(struct inode *inode, struct file *file)
242 {
243 return single_open(file, hotkey_info_seq_show, PDE(inode)->data);
244 }
245
246 static char *format_result(union acpi_object *object)
247 {
248 char *buf = NULL;
249
250 buf = (char *)kmalloc(RESULT_STR_LEN, GFP_KERNEL);
251 if (buf)
252 memset(buf, 0, RESULT_STR_LEN);
253 else
254 goto do_fail;
255
256 /* Now, just support integer type */
257 if (object->type == ACPI_TYPE_INTEGER)
258 sprintf(buf, "%d\n", (u32) object->integer.value);
259 do_fail:
260 return (buf);
261 }
262
263 static int hotkey_polling_seq_show(struct seq_file *seq, void *offset)
264 {
265 struct acpi_polling_hotkey *poll_hotkey =
266 (struct acpi_polling_hotkey *)seq->private;
267 char *buf;
268
269 ACPI_FUNCTION_TRACE("hotkey_polling_seq_show");
270
271 if (poll_hotkey->poll_result) {
272 buf = format_result(poll_hotkey->poll_result);
273 if (buf)
274 seq_printf(seq, "%s", buf);
275 kfree(buf);
276 }
277 return_VALUE(0);
278 }
279
280 static int hotkey_polling_open_fs(struct inode *inode, struct file *file)
281 {
282 return single_open(file, hotkey_polling_seq_show, PDE(inode)->data);
283 }
284
285 static int hotkey_action_open_fs(struct inode *inode, struct file *file)
286 {
287 return single_open(file, hotkey_info_seq_show, PDE(inode)->data);
288 }
289
290 /* Mapping external hotkey number to standardized hotkey event num */
291 static int hotkey_get_internal_event(int event, struct acpi_hotkey_list *list)
292 {
293 struct list_head *entries;
294 int val = -1;
295
296 ACPI_FUNCTION_TRACE("hotkey_get_internal_event");
297
298 list_for_each(entries, list->entries) {
299 union acpi_hotkey *key =
300 container_of(entries, union acpi_hotkey, entries);
301 if (key->link.hotkey_type == ACPI_HOTKEY_EVENT
302 && key->event_hotkey.external_hotkey_num == event) {
303 val = key->link.hotkey_standard_num;
304 break;
305 }
306 }
307
308 return_VALUE(val);
309 }
310
311 static void
312 acpi_hotkey_notify_handler(acpi_handle handle, u32 event, void *data)
313 {
314 struct acpi_device *device = NULL;
315 u32 internal_event;
316
317 ACPI_FUNCTION_TRACE("acpi_hotkey_notify_handler");
318
319 if (acpi_bus_get_device(handle, &device))
320 return_VOID;
321
322 internal_event = hotkey_get_internal_event(event, &global_hotkey_list);
323 acpi_bus_generate_event(device, internal_event, 0);
324
325 return_VOID;
326 }
327
328 /* Need to invent automatically hotkey add method */
329 static int auto_hotkey_add(struct acpi_device *device)
330 {
331 /* Implement me */
332 return 0;
333 }
334
335 /* Need to invent automatically hotkey remove method */
336 static int auto_hotkey_remove(struct acpi_device *device, int type)
337 {
338 /* Implement me */
339 return 0;
340 }
341
342 /* Create a proc file for each polling method */
343 static int create_polling_proc(union acpi_hotkey *device)
344 {
345 struct proc_dir_entry *proc;
346 char proc_name[80];
347 mode_t mode;
348
349 ACPI_FUNCTION_TRACE("create_polling_proc");
350 mode = S_IFREG | S_IRUGO | S_IWUGO;
351
352 sprintf(proc_name, "%d", device->link.hotkey_standard_num);
353 /*
354 strcat(proc_name, device->poll_hotkey.poll_method);
355 */
356 proc = create_proc_entry(proc_name, mode, hotkey_proc_dir);
357
358 if (!proc) {
359 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
360 "Hotkey: Unable to create %s entry\n",
361 device->poll_hotkey.poll_method));
362 return_VALUE(-ENODEV);
363 } else {
364 proc->proc_fops = &hotkey_polling_fops;
365 proc->owner = THIS_MODULE;
366 proc->data = device;
367 proc->uid = 0;
368 proc->gid = 0;
369 device->poll_hotkey.proc = proc;
370 }
371 return_VALUE(0);
372 }
373
374 static int hotkey_add(union acpi_hotkey *device)
375 {
376 int status = 0;
377 struct acpi_device *dev = NULL;
378
379 ACPI_FUNCTION_TRACE("hotkey_add");
380
381 if (device->link.hotkey_type == ACPI_HOTKEY_EVENT) {
382 acpi_bus_get_device(device->event_hotkey.bus_handle, &dev);
383 status = acpi_install_notify_handler(dev->handle,
384 ACPI_DEVICE_NOTIFY,
385 acpi_hotkey_notify_handler,
386 dev);
387 } else /* Add polling hotkey */
388 create_polling_proc(device);
389
390 global_hotkey_list.count++;
391
392 list_add_tail(&device->link.entries, global_hotkey_list.entries);
393
394 return_VALUE(status);
395 }
396
397 static int hotkey_remove(union acpi_hotkey *device)
398 {
399 struct list_head *entries, *next;
400
401 ACPI_FUNCTION_TRACE("hotkey_remove");
402
403 list_for_each_safe(entries, next, global_hotkey_list.entries) {
404 union acpi_hotkey *key =
405 container_of(entries, union acpi_hotkey, entries);
406 if (key->link.hotkey_standard_num ==
407 device->link.hotkey_standard_num) {
408 list_del(&key->link.entries);
409 free_hotkey_device(key);
410 global_hotkey_list.count--;
411 break;
412 }
413 }
414 kfree(device);
415 return_VALUE(0);
416 }
417
418 static int hotkey_update(union acpi_hotkey *key)
419 {
420 struct list_head *entries;
421
422 ACPI_FUNCTION_TRACE("hotkey_update");
423
424 list_for_each(entries, global_hotkey_list.entries) {
425 union acpi_hotkey *tmp =
426 container_of(entries, union acpi_hotkey, entries);
427 if (tmp->link.hotkey_standard_num ==
428 key->link.hotkey_standard_num) {
429 if (key->link.hotkey_type == ACPI_HOTKEY_EVENT) {
430 free_hotkey_buffer(tmp);
431 tmp->event_hotkey.bus_handle =
432 key->event_hotkey.bus_handle;
433 tmp->event_hotkey.external_hotkey_num =
434 key->event_hotkey.external_hotkey_num;
435 tmp->event_hotkey.action_handle =
436 key->event_hotkey.action_handle;
437 tmp->event_hotkey.action_method =
438 key->event_hotkey.action_method;
439 kfree(key);
440 } else {
441 /*
442 char proc_name[80];
443
444 sprintf(proc_name, "%d", tmp->link.hotkey_standard_num);
445 strcat(proc_name, tmp->poll_hotkey.poll_method);
446 remove_proc_entry(proc_name,hotkey_proc_dir);
447 */
448 free_poll_hotkey_buffer(tmp);
449 tmp->poll_hotkey.poll_handle =
450 key->poll_hotkey.poll_handle;
451 tmp->poll_hotkey.poll_method =
452 key->poll_hotkey.poll_method;
453 tmp->poll_hotkey.action_handle =
454 key->poll_hotkey.action_handle;
455 tmp->poll_hotkey.action_method =
456 key->poll_hotkey.action_method;
457 tmp->poll_hotkey.poll_result =
458 key->poll_hotkey.poll_result;
459 /*
460 create_polling_proc(tmp);
461 */
462 kfree(key);
463 }
464 return_VALUE(0);
465 break;
466 }
467 }
468
469 return_VALUE(-ENODEV);
470 }
471
472 static void free_hotkey_device(union acpi_hotkey *key)
473 {
474 struct acpi_device *dev;
475
476 ACPI_FUNCTION_TRACE("free_hotkey_device");
477
478 if (key->link.hotkey_type == ACPI_HOTKEY_EVENT) {
479 acpi_bus_get_device(key->event_hotkey.bus_handle, &dev);
480 if (dev->handle)
481 acpi_remove_notify_handler(dev->handle,
482 ACPI_DEVICE_NOTIFY,
483 acpi_hotkey_notify_handler);
484 free_hotkey_buffer(key);
485 } else {
486 char proc_name[80];
487
488 sprintf(proc_name, "%d", key->link.hotkey_standard_num);
489 /*
490 strcat(proc_name, key->poll_hotkey.poll_method);
491 */
492 remove_proc_entry(proc_name, hotkey_proc_dir);
493 free_poll_hotkey_buffer(key);
494 }
495 kfree(key);
496 return_VOID;
497 }
498
499 static void free_hotkey_buffer(union acpi_hotkey *key)
500 {
501 kfree(key->event_hotkey.action_method);
502 }
503
504 static void free_poll_hotkey_buffer(union acpi_hotkey *key)
505 {
506 kfree(key->poll_hotkey.action_method);
507 kfree(key->poll_hotkey.poll_method);
508 kfree(key->poll_hotkey.poll_result);
509 }
510 static int
511 init_hotkey_device(union acpi_hotkey *key, char *bus_str, char *action_str,
512 char *method, int std_num, int external_num)
513 {
514 acpi_handle tmp_handle;
515 acpi_status status = AE_OK;
516
517 ACPI_FUNCTION_TRACE("init_hotkey_device");
518
519 if (std_num < 0 || IS_POLL(std_num) || !key)
520 goto do_fail;
521
522 if (!bus_str || !action_str || !method)
523 goto do_fail;
524
525 key->link.hotkey_type = ACPI_HOTKEY_EVENT;
526 key->link.hotkey_standard_num = std_num;
527 key->event_hotkey.flag = 0;
528 key->event_hotkey.action_method = method;
529
530 status =
531 acpi_get_handle(NULL, bus_str, &(key->event_hotkey.bus_handle));
532 if (ACPI_FAILURE(status))
533 goto do_fail;
534 key->event_hotkey.external_hotkey_num = external_num;
535 status =
536 acpi_get_handle(NULL, action_str,
537 &(key->event_hotkey.action_handle));
538 if (ACPI_FAILURE(status))
539 goto do_fail;
540 status = acpi_get_handle(key->event_hotkey.action_handle,
541 method, &tmp_handle);
542 if (ACPI_FAILURE(status))
543 goto do_fail;
544 return_VALUE(AE_OK);
545 do_fail:
546 return_VALUE(-ENODEV);
547 }
548
549 static int
550 init_poll_hotkey_device(union acpi_hotkey *key,
551 char *poll_str,
552 char *poll_method,
553 char *action_str, char *action_method, int std_num)
554 {
555 acpi_status status = AE_OK;
556 acpi_handle tmp_handle;
557
558 ACPI_FUNCTION_TRACE("init_poll_hotkey_device");
559
560 if (std_num < 0 || IS_EVENT(std_num) || !key)
561 goto do_fail;
562
563 if (!poll_str || !poll_method || !action_str || !action_method)
564 goto do_fail;
565
566 key->link.hotkey_type = ACPI_HOTKEY_POLLING;
567 key->link.hotkey_standard_num = std_num;
568 key->poll_hotkey.flag = 0;
569 key->poll_hotkey.poll_method = poll_method;
570 key->poll_hotkey.action_method = action_method;
571
572 status =
573 acpi_get_handle(NULL, poll_str, &(key->poll_hotkey.poll_handle));
574 if (ACPI_FAILURE(status))
575 goto do_fail;
576 status = acpi_get_handle(key->poll_hotkey.poll_handle,
577 poll_method, &tmp_handle);
578 if (ACPI_FAILURE(status))
579 goto do_fail;
580 status =
581 acpi_get_handle(NULL, action_str,
582 &(key->poll_hotkey.action_handle));
583 if (ACPI_FAILURE(status))
584 goto do_fail;
585 status = acpi_get_handle(key->poll_hotkey.action_handle,
586 action_method, &tmp_handle);
587 if (ACPI_FAILURE(status))
588 goto do_fail;
589 key->poll_hotkey.poll_result =
590 (union acpi_object *)kmalloc(sizeof(union acpi_object), GFP_KERNEL);
591 if (!key->poll_hotkey.poll_result)
592 goto do_fail;
593 return_VALUE(AE_OK);
594 do_fail:
595 return_VALUE(-ENODEV);
596 }
597
598 static int hotkey_open_config(struct inode *inode, struct file *file)
599 {
600 ACPI_FUNCTION_TRACE("hotkey_open_config");
601 return_VALUE(single_open
602 (file, hotkey_config_seq_show, PDE(inode)->data));
603 }
604
605 static int hotkey_poll_open_config(struct inode *inode, struct file *file)
606 {
607 ACPI_FUNCTION_TRACE("hotkey_poll_open_config");
608 return_VALUE(single_open
609 (file, hotkey_poll_config_seq_show, PDE(inode)->data));
610 }
611
612 static int hotkey_config_seq_show(struct seq_file *seq, void *offset)
613 {
614 struct acpi_hotkey_list *hotkey_list = &global_hotkey_list;
615 struct list_head *entries;
616 char bus_name[ACPI_PATHNAME_MAX] = { 0 };
617 char action_name[ACPI_PATHNAME_MAX] = { 0 };
618 struct acpi_buffer bus = { ACPI_PATHNAME_MAX, bus_name };
619 struct acpi_buffer act = { ACPI_PATHNAME_MAX, action_name };
620
621 ACPI_FUNCTION_TRACE(("hotkey_config_seq_show"));
622
623 list_for_each(entries, hotkey_list->entries) {
624 union acpi_hotkey *key =
625 container_of(entries, union acpi_hotkey, entries);
626 if (key->link.hotkey_type == ACPI_HOTKEY_EVENT) {
627 acpi_get_name(key->event_hotkey.bus_handle,
628 ACPI_NAME_TYPE_MAX, &bus);
629 acpi_get_name(key->event_hotkey.action_handle,
630 ACPI_NAME_TYPE_MAX, &act);
631 seq_printf(seq, "%s:%s:%s:%d:%d\n", bus_name,
632 action_name,
633 key->event_hotkey.action_method,
634 key->link.hotkey_standard_num,
635 key->event_hotkey.external_hotkey_num);
636 }
637 }
638 seq_puts(seq, "\n");
639 return_VALUE(0);
640 }
641
642 static int hotkey_poll_config_seq_show(struct seq_file *seq, void *offset)
643 {
644 struct acpi_hotkey_list *hotkey_list = &global_hotkey_list;
645 struct list_head *entries;
646 char bus_name[ACPI_PATHNAME_MAX] = { 0 };
647 char action_name[ACPI_PATHNAME_MAX] = { 0 };
648 struct acpi_buffer bus = { ACPI_PATHNAME_MAX, bus_name };
649 struct acpi_buffer act = { ACPI_PATHNAME_MAX, action_name };
650
651 ACPI_FUNCTION_TRACE(("hotkey_config_seq_show"));
652
653 list_for_each(entries, hotkey_list->entries) {
654 union acpi_hotkey *key =
655 container_of(entries, union acpi_hotkey, entries);
656 if (key->link.hotkey_type == ACPI_HOTKEY_POLLING) {
657 acpi_get_name(key->poll_hotkey.poll_handle,
658 ACPI_NAME_TYPE_MAX, &bus);
659 acpi_get_name(key->poll_hotkey.action_handle,
660 ACPI_NAME_TYPE_MAX, &act);
661 seq_printf(seq, "%s:%s:%s:%s:%d\n", bus_name,
662 key->poll_hotkey.poll_method,
663 action_name,
664 key->poll_hotkey.action_method,
665 key->link.hotkey_standard_num);
666 }
667 }
668 seq_puts(seq, "\n");
669 return_VALUE(0);
670 }
671
672 static int
673 get_parms(char *config_record,
674 int *cmd,
675 char **bus_handle,
676 char **bus_method,
677 char **action_handle,
678 char **method, int *internal_event_num, int *external_event_num)
679 {
680 char *tmp, *tmp1, count;
681 ACPI_FUNCTION_TRACE(("get_parms"));
682
683 sscanf(config_record, "%d", cmd);
684
685 if (*cmd == 1) {
686 if (sscanf(config_record, "%d:%d", cmd, internal_event_num) !=
687 2)
688 goto do_fail;
689 else
690 return (6);
691 }
692 tmp = strchr(config_record, ':');
693 if (!tmp)
694 goto do_fail;
695 tmp++;
696 tmp1 = strchr(tmp, ':');
697 if (!tmp1)
698 goto do_fail;
699
700 count = tmp1 - tmp;
701 *bus_handle = (char *)kmalloc(count + 1, GFP_KERNEL);
702 if (!*bus_handle)
703 goto do_fail;
704 strncpy(*bus_handle, tmp, count);
705 *(*bus_handle + count) = 0;
706
707 tmp = tmp1;
708 tmp++;
709 tmp1 = strchr(tmp, ':');
710 if (!tmp1)
711 goto do_fail;
712 count = tmp1 - tmp;
713 *bus_method = (char *)kmalloc(count + 1, GFP_KERNEL);
714 if (!*bus_method)
715 goto do_fail;
716 strncpy(*bus_method, tmp, count);
717 *(*bus_method + count) = 0;
718
719 tmp = tmp1;
720 tmp++;
721 tmp1 = strchr(tmp, ':');
722 if (!tmp1)
723 goto do_fail;
724 count = tmp1 - tmp;
725 *action_handle = (char *)kmalloc(count + 1, GFP_KERNEL);
726 strncpy(*action_handle, tmp, count);
727 *(*action_handle + count) = 0;
728
729 tmp = tmp1;
730 tmp++;
731 tmp1 = strchr(tmp, ':');
732 if (!tmp1)
733 goto do_fail;
734 count = tmp1 - tmp;
735 *method = (char *)kmalloc(count + 1, GFP_KERNEL);
736 if (!*method)
737 goto do_fail;
738 strncpy(*method, tmp, count);
739 *(*method + count) = 0;
740
741 if (sscanf(tmp1 + 1, "%d:%d", internal_event_num, external_event_num) <=
742 0)
743 goto do_fail;
744
745 return_VALUE(6);
746 do_fail:
747 return_VALUE(-1);
748 }
749
750 /* count is length for one input record */
751 static ssize_t hotkey_write_config(struct file *file,
752 const char __user * buffer,
753 size_t count, loff_t * data)
754 {
755 char *config_record = NULL;
756 char *bus_handle = NULL;
757 char *bus_method = NULL;
758 char *action_handle = NULL;
759 char *method = NULL;
760 int cmd, internal_event_num, external_event_num;
761 int ret = 0;
762 union acpi_hotkey *key = NULL;
763
764 ACPI_FUNCTION_TRACE(("hotkey_write_config"));
765
766 config_record = (char *)kmalloc(count + 1, GFP_KERNEL);
767 if (!config_record)
768 return_VALUE(-ENOMEM);
769
770 if (copy_from_user(config_record, buffer, count)) {
771 kfree(config_record);
772 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data \n"));
773 return_VALUE(-EINVAL);
774 }
775 config_record[count] = 0;
776
777 ret = get_parms(config_record,
778 &cmd,
779 &bus_handle,
780 &bus_method,
781 &action_handle,
782 &method, &internal_event_num, &external_event_num);
783
784 kfree(config_record);
785 if (IS_OTHERS(internal_event_num))
786 goto do_fail;
787 if (ret != 6) {
788 do_fail:
789 kfree(bus_handle);
790 kfree(bus_method);
791 kfree(action_handle);
792 kfree(method);
793 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
794 "Invalid data format ret=%d\n", ret));
795 return_VALUE(-EINVAL);
796 }
797
798 key = kmalloc(sizeof(union acpi_hotkey), GFP_KERNEL);
799 if (!key)
800 goto do_fail;
801 memset(key, 0, sizeof(union acpi_hotkey));
802 if (cmd == 1) {
803 union acpi_hotkey *tmp = NULL;
804 tmp = get_hotkey_by_event(&global_hotkey_list,
805 internal_event_num);
806 if (!tmp)
807 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid key"));
808 else
809 memcpy(key, tmp, sizeof(union acpi_hotkey));
810 goto cont_cmd;
811 }
812 if (IS_EVENT(internal_event_num)) {
813 kfree(bus_method);
814 ret = init_hotkey_device(key, bus_handle, action_handle, method,
815 internal_event_num,
816 external_event_num);
817 } else
818 ret = init_poll_hotkey_device(key, bus_handle, bus_method,
819 action_handle, method,
820 internal_event_num);
821 if (ret) {
822 kfree(bus_handle);
823 kfree(action_handle);
824 if (IS_EVENT(internal_event_num))
825 free_hotkey_buffer(key);
826 else
827 free_poll_hotkey_buffer(key);
828 kfree(key);
829 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid hotkey \n"));
830 return_VALUE(-EINVAL);
831 }
832
833 cont_cmd:
834 kfree(bus_handle);
835 kfree(action_handle);
836
837 switch (cmd) {
838 case 0:
839 if (get_hotkey_by_event
840 (&global_hotkey_list, key->link.hotkey_standard_num))
841 goto fail_out;
842 else
843 hotkey_add(key);
844 break;
845 case 1:
846 hotkey_remove(key);
847 break;
848 case 2:
849 if (hotkey_update(key))
850 goto fail_out;
851 break;
852 default:
853 goto fail_out;
854 break;
855 }
856 return_VALUE(count);
857 fail_out:
858 if (IS_EVENT(internal_event_num))
859 free_hotkey_buffer(key);
860 else
861 free_poll_hotkey_buffer(key);
862 kfree(key);
863 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "invalid key\n"));
864 return_VALUE(-EINVAL);
865 }
866
867 /*
868 * This function evaluates an ACPI method, given an int as parameter, the
869 * method is searched within the scope of the handle, can be NULL. The output
870 * of the method is written is output, which can also be NULL
871 *
872 * returns 1 if write is successful, 0 else.
873 */
874 static int write_acpi_int(acpi_handle handle, const char *method, int val,
875 struct acpi_buffer *output)
876 {
877 struct acpi_object_list params; /* list of input parameters (an int here) */
878 union acpi_object in_obj; /* the only param we use */
879 acpi_status status;
880
881 ACPI_FUNCTION_TRACE("write_acpi_int");
882 params.count = 1;
883 params.pointer = &in_obj;
884 in_obj.type = ACPI_TYPE_INTEGER;
885 in_obj.integer.value = val;
886
887 status = acpi_evaluate_object(handle, (char *)method, &params, output);
888
889 return_VALUE(status == AE_OK);
890 }
891
892 static int read_acpi_int(acpi_handle handle, const char *method,
893 union acpi_object *val)
894 {
895 struct acpi_buffer output;
896 union acpi_object out_obj;
897 acpi_status status;
898
899 ACPI_FUNCTION_TRACE("read_acpi_int");
900 output.length = sizeof(out_obj);
901 output.pointer = &out_obj;
902
903 status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
904 if (val) {
905 val->integer.value = out_obj.integer.value;
906 val->type = out_obj.type;
907 } else
908 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "null val pointer"));
909 return_VALUE((status == AE_OK)
910 && (out_obj.type == ACPI_TYPE_INTEGER));
911 }
912
913 static union acpi_hotkey *get_hotkey_by_event(struct
914 acpi_hotkey_list
915 *hotkey_list, int event)
916 {
917 struct list_head *entries;
918
919 list_for_each(entries, hotkey_list->entries) {
920 union acpi_hotkey *key =
921 container_of(entries, union acpi_hotkey, entries);
922 if (key->link.hotkey_standard_num == event) {
923 return (key);
924 }
925 }
926 return (NULL);
927 }
928
929 /*
930 * user call AML method interface:
931 * Call convention:
932 * echo "event_num: arg type : value"
933 * example: echo "1:1:30" > /proc/acpi/action
934 * Just support 1 integer arg passing to AML method
935 */
936
937 static ssize_t hotkey_execute_aml_method(struct file *file,
938 const char __user * buffer,
939 size_t count, loff_t * data)
940 {
941 struct acpi_hotkey_list *hotkey_list = &global_hotkey_list;
942 char *arg;
943 int event, method_type, type, value;
944 union acpi_hotkey *key;
945
946 ACPI_FUNCTION_TRACE("hotkey_execte_aml_method");
947
948 arg = (char *)kmalloc(count + 1, GFP_KERNEL);
949 if (!arg)
950 return_VALUE(-ENOMEM);
951 arg[count] = 0;
952
953 if (copy_from_user(arg, buffer, count)) {
954 kfree(arg);
955 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument 2"));
956 return_VALUE(-EINVAL);
957 }
958
959 if (sscanf(arg, "%d:%d:%d:%d", &event, &method_type, &type, &value) !=
960 4) {
961 kfree(arg);
962 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument 3"));
963 return_VALUE(-EINVAL);
964 }
965 kfree(arg);
966 if (type == ACPI_TYPE_INTEGER) {
967 key = get_hotkey_by_event(hotkey_list, event);
968 if (!key)
969 goto do_fail;
970 if (IS_EVENT(event))
971 write_acpi_int(key->event_hotkey.action_handle,
972 key->event_hotkey.action_method, value,
973 NULL);
974 else if (IS_POLL(event)) {
975 if (method_type == POLL_METHOD)
976 read_acpi_int(key->poll_hotkey.poll_handle,
977 key->poll_hotkey.poll_method,
978 key->poll_hotkey.poll_result);
979 else if (method_type == ACTION_METHOD)
980 write_acpi_int(key->poll_hotkey.action_handle,
981 key->poll_hotkey.action_method,
982 value, NULL);
983 else
984 goto do_fail;
985
986 }
987 } else {
988 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Not supported"));
989 return_VALUE(-EINVAL);
990 }
991 return_VALUE(count);
992 do_fail:
993 return_VALUE(-EINVAL);
994
995 }
996
997 static int __init hotkey_init(void)
998 {
999 int result;
1000 mode_t mode = S_IFREG | S_IRUGO | S_IWUGO;
1001
1002 ACPI_FUNCTION_TRACE("hotkey_init");
1003
1004 if (acpi_disabled)
1005 return -ENODEV;
1006
1007 if (acpi_specific_hotkey_enabled) {
1008 printk("Using specific hotkey driver\n");
1009 return -ENODEV;
1010 }
1011
1012 hotkey_proc_dir = proc_mkdir(HOTKEY_PROC, acpi_root_dir);
1013 if (!hotkey_proc_dir) {
1014 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1015 "Hotkey: Unable to create %s entry\n",
1016 HOTKEY_PROC));
1017 return (-ENODEV);
1018 }
1019 hotkey_proc_dir->owner = THIS_MODULE;
1020
1021 hotkey_config =
1022 create_proc_entry(HOTKEY_EV_CONFIG, mode, hotkey_proc_dir);
1023 if (!hotkey_config) {
1024 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1025 "Hotkey: Unable to create %s entry\n",
1026 HOTKEY_EV_CONFIG));
1027 goto do_fail1;
1028 } else {
1029 hotkey_config->proc_fops = &hotkey_config_fops;
1030 hotkey_config->data = &global_hotkey_list;
1031 hotkey_config->owner = THIS_MODULE;
1032 hotkey_config->uid = 0;
1033 hotkey_config->gid = 0;
1034 }
1035
1036 hotkey_poll_config =
1037 create_proc_entry(HOTKEY_PL_CONFIG, mode, hotkey_proc_dir);
1038 if (!hotkey_poll_config) {
1039 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1040 "Hotkey: Unable to create %s entry\n",
1041 HOTKEY_EV_CONFIG));
1042
1043 goto do_fail2;
1044 } else {
1045 hotkey_poll_config->proc_fops = &hotkey_poll_config_fops;
1046 hotkey_poll_config->data = &global_hotkey_list;
1047 hotkey_poll_config->owner = THIS_MODULE;
1048 hotkey_poll_config->uid = 0;
1049 hotkey_poll_config->gid = 0;
1050 }
1051
1052 hotkey_action = create_proc_entry(HOTKEY_ACTION, mode, hotkey_proc_dir);
1053 if (!hotkey_action) {
1054 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1055 "Hotkey: Unable to create %s entry\n",
1056 HOTKEY_ACTION));
1057 goto do_fail3;
1058 } else {
1059 hotkey_action->proc_fops = &hotkey_action_fops;
1060 hotkey_action->owner = THIS_MODULE;
1061 hotkey_action->uid = 0;
1062 hotkey_action->gid = 0;
1063 }
1064
1065 hotkey_info = create_proc_entry(HOTKEY_INFO, mode, hotkey_proc_dir);
1066 if (!hotkey_info) {
1067 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
1068 "Hotkey: Unable to create %s entry\n",
1069 HOTKEY_INFO));
1070 goto do_fail4;
1071 } else {
1072 hotkey_info->proc_fops = &hotkey_info_fops;
1073 hotkey_info->owner = THIS_MODULE;
1074 hotkey_info->uid = 0;
1075 hotkey_info->gid = 0;
1076 }
1077
1078 result = acpi_bus_register_driver(&hotkey_driver);
1079 if (result < 0)
1080 goto do_fail5;
1081 global_hotkey_list.count = 0;
1082 global_hotkey_list.entries = &hotkey_entries;
1083
1084 INIT_LIST_HEAD(&hotkey_entries);
1085
1086 return (0);
1087
1088 do_fail5:
1089 remove_proc_entry(HOTKEY_INFO, hotkey_proc_dir);
1090 do_fail4:
1091 remove_proc_entry(HOTKEY_ACTION, hotkey_proc_dir);
1092 do_fail3:
1093 remove_proc_entry(HOTKEY_PL_CONFIG, hotkey_proc_dir);
1094 do_fail2:
1095 remove_proc_entry(HOTKEY_EV_CONFIG, hotkey_proc_dir);
1096 do_fail1:
1097 remove_proc_entry(HOTKEY_PROC, acpi_root_dir);
1098 return (-ENODEV);
1099 }
1100
1101 static void __exit hotkey_exit(void)
1102 {
1103 struct list_head *entries, *next;
1104
1105 ACPI_FUNCTION_TRACE("hotkey_exit");
1106
1107 list_for_each_safe(entries, next, global_hotkey_list.entries) {
1108 union acpi_hotkey *key =
1109 container_of(entries, union acpi_hotkey, entries);
1110
1111 acpi_os_wait_events_complete(NULL);
1112 list_del(&key->link.entries);
1113 global_hotkey_list.count--;
1114 free_hotkey_device(key);
1115 }
1116 acpi_bus_unregister_driver(&hotkey_driver);
1117 remove_proc_entry(HOTKEY_EV_CONFIG, hotkey_proc_dir);
1118 remove_proc_entry(HOTKEY_PL_CONFIG, hotkey_proc_dir);
1119 remove_proc_entry(HOTKEY_ACTION, hotkey_proc_dir);
1120 remove_proc_entry(HOTKEY_INFO, hotkey_proc_dir);
1121 remove_proc_entry(HOTKEY_PROC, acpi_root_dir);
1122 return;
1123 }
1124
1125 module_init(hotkey_init);
1126 module_exit(hotkey_exit);
Linux kernel - Deliverables
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