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26#include <linux/kernel.h>
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/types.h>
30#include <linux/proc_fs.h>
31#include <linux/seq_file.h>
32#include <linux/input.h>
33#include <acpi/acpi_bus.h>
34#include <acpi/acpi_drivers.h>
35
36#define ACPI_BUTTON_COMPONENT 0x00080000
37#define ACPI_BUTTON_CLASS "button"
38#define ACPI_BUTTON_FILE_INFO "info"
39#define ACPI_BUTTON_FILE_STATE "state"
40#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
41#define ACPI_BUTTON_NOTIFY_STATUS 0x80
42
43#define ACPI_BUTTON_SUBCLASS_POWER "power"
44#define ACPI_BUTTON_HID_POWER "PNP0C0C"
45#define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button (CM)"
46#define ACPI_BUTTON_DEVICE_NAME_POWERF "Power Button (FF)"
47#define ACPI_BUTTON_TYPE_POWER 0x01
48#define ACPI_BUTTON_TYPE_POWERF 0x02
49
50#define ACPI_BUTTON_SUBCLASS_SLEEP "sleep"
51#define ACPI_BUTTON_HID_SLEEP "PNP0C0E"
52#define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button (CM)"
53#define ACPI_BUTTON_DEVICE_NAME_SLEEPF "Sleep Button (FF)"
54#define ACPI_BUTTON_TYPE_SLEEP 0x03
55#define ACPI_BUTTON_TYPE_SLEEPF 0x04
56
57#define ACPI_BUTTON_SUBCLASS_LID "lid"
58#define ACPI_BUTTON_HID_LID "PNP0C0D"
59#define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch"
60#define ACPI_BUTTON_TYPE_LID 0x05
61
62#define _COMPONENT ACPI_BUTTON_COMPONENT
63ACPI_MODULE_NAME("button");
64
65MODULE_AUTHOR("Paul Diefenbaugh");
66MODULE_DESCRIPTION("ACPI Button Driver");
67MODULE_LICENSE("GPL");
68
69static const struct acpi_device_id button_device_ids[] = {
70 {ACPI_BUTTON_HID_LID, 0},
71 {ACPI_BUTTON_HID_SLEEP, 0},
72 {ACPI_BUTTON_HID_SLEEPF, 0},
73 {ACPI_BUTTON_HID_POWER, 0},
74 {ACPI_BUTTON_HID_POWERF, 0},
75 {"", 0},
76};
77MODULE_DEVICE_TABLE(acpi, button_device_ids);
78
79static int acpi_button_add(struct acpi_device *device);
80static int acpi_button_remove(struct acpi_device *device, int type);
81static int acpi_button_resume(struct acpi_device *device);
82static int acpi_button_info_open_fs(struct inode *inode, struct file *file);
83static int acpi_button_state_open_fs(struct inode *inode, struct file *file);
84
85static struct acpi_driver acpi_button_driver = {
86 .name = "button",
87 .class = ACPI_BUTTON_CLASS,
88 .ids = button_device_ids,
89 .ops = {
90 .add = acpi_button_add,
91 .resume = acpi_button_resume,
92 .remove = acpi_button_remove,
93 },
94};
95
96struct acpi_button {
97 struct acpi_device *device;
98 unsigned int type;
99 struct input_dev *input;
100 char phys[32];
101 unsigned long pushed;
102};
103
104static const struct file_operations acpi_button_info_fops = {
105 .owner = THIS_MODULE,
106 .open = acpi_button_info_open_fs,
107 .read = seq_read,
108 .llseek = seq_lseek,
109 .release = single_release,
110};
111
112static const struct file_operations acpi_button_state_fops = {
113 .owner = THIS_MODULE,
114 .open = acpi_button_state_open_fs,
115 .read = seq_read,
116 .llseek = seq_lseek,
117 .release = single_release,
118};
119
120
121
122
123
124static struct proc_dir_entry *acpi_button_dir;
125
126static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
127{
128 struct acpi_button *button = seq->private;
129
130 if (!button || !button->device)
131 return 0;
132
133 seq_printf(seq, "type: %s\n",
134 acpi_device_name(button->device));
135
136 return 0;
137}
138
139static int acpi_button_info_open_fs(struct inode *inode, struct file *file)
140{
141 return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
142}
143
144static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
145{
146 struct acpi_button *button = seq->private;
147 acpi_status status;
148 unsigned long long state;
149
150 if (!button || !button->device)
151 return 0;
152
153 status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state);
154 seq_printf(seq, "state: %s\n",
155 ACPI_FAILURE(status) ? "unsupported" :
156 (state ? "open" : "closed"));
157 return 0;
158}
159
160static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
161{
162 return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
163}
164
165static struct proc_dir_entry *acpi_power_dir;
166static struct proc_dir_entry *acpi_sleep_dir;
167static struct proc_dir_entry *acpi_lid_dir;
168
169static int acpi_button_add_fs(struct acpi_device *device)
170{
171 struct proc_dir_entry *entry = NULL;
172 struct acpi_button *button;
173
174 if (!device || !acpi_driver_data(device))
175 return -EINVAL;
176
177 button = acpi_driver_data(device);
178
179 switch (button->type) {
180 case ACPI_BUTTON_TYPE_POWER:
181 case ACPI_BUTTON_TYPE_POWERF:
182 if (!acpi_power_dir)
183 acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
184 acpi_button_dir);
185 entry = acpi_power_dir;
186 break;
187 case ACPI_BUTTON_TYPE_SLEEP:
188 case ACPI_BUTTON_TYPE_SLEEPF:
189 if (!acpi_sleep_dir)
190 acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
191 acpi_button_dir);
192 entry = acpi_sleep_dir;
193 break;
194 case ACPI_BUTTON_TYPE_LID:
195 if (!acpi_lid_dir)
196 acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
197 acpi_button_dir);
198 entry = acpi_lid_dir;
199 break;
200 }
201
202 if (!entry)
203 return -ENODEV;
204 entry->owner = THIS_MODULE;
205
206 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
207 if (!acpi_device_dir(device))
208 return -ENODEV;
209 acpi_device_dir(device)->owner = THIS_MODULE;
210
211
212 entry = proc_create_data(ACPI_BUTTON_FILE_INFO,
213 S_IRUGO, acpi_device_dir(device),
214 &acpi_button_info_fops,
215 acpi_driver_data(device));
216 if (!entry)
217 return -ENODEV;
218
219
220 if (button->type == ACPI_BUTTON_TYPE_LID) {
221 entry = proc_create_data(ACPI_BUTTON_FILE_STATE,
222 S_IRUGO, acpi_device_dir(device),
223 &acpi_button_state_fops,
224 acpi_driver_data(device));
225 if (!entry)
226 return -ENODEV;
227 }
228
229 return 0;
230}
231
232static int acpi_button_remove_fs(struct acpi_device *device)
233{
234 struct acpi_button *button = acpi_driver_data(device);
235
236 if (acpi_device_dir(device)) {
237 if (button->type == ACPI_BUTTON_TYPE_LID)
238 remove_proc_entry(ACPI_BUTTON_FILE_STATE,
239 acpi_device_dir(device));
240 remove_proc_entry(ACPI_BUTTON_FILE_INFO,
241 acpi_device_dir(device));
242
243 remove_proc_entry(acpi_device_bid(device),
244 acpi_device_dir(device)->parent);
245 acpi_device_dir(device) = NULL;
246 }
247
248 return 0;
249}
250
251
252
253
254static int acpi_lid_send_state(struct acpi_button *button)
255{
256 unsigned long long state;
257 acpi_status status;
258
259 status = acpi_evaluate_integer(button->device->handle, "_LID", NULL,
260 &state);
261 if (ACPI_FAILURE(status))
262 return -ENODEV;
263
264 input_report_switch(button->input, SW_LID, !state);
265 input_sync(button->input);
266 return 0;
267}
268
269static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
270{
271 struct acpi_button *button = data;
272 struct input_dev *input;
273
274 if (!button || !button->device)
275 return;
276
277 switch (event) {
278 case ACPI_BUTTON_NOTIFY_STATUS:
279 input = button->input;
280 if (button->type == ACPI_BUTTON_TYPE_LID) {
281 acpi_lid_send_state(button);
282 } else {
283 int keycode = test_bit(KEY_SLEEP, input->keybit) ?
284 KEY_SLEEP : KEY_POWER;
285
286 input_report_key(input, keycode, 1);
287 input_sync(input);
288 input_report_key(input, keycode, 0);
289 input_sync(input);
290 }
291
292 acpi_bus_generate_proc_event(button->device, event,
293 ++button->pushed);
294 break;
295 default:
296 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
297 "Unsupported event [0x%x]\n", event));
298 break;
299 }
300
301 return;
302}
303
304static acpi_status acpi_button_notify_fixed(void *data)
305{
306 struct acpi_button *button = data;
307
308 if (!button)
309 return AE_BAD_PARAMETER;
310
311 acpi_button_notify(button->device->handle, ACPI_BUTTON_NOTIFY_STATUS, button);
312
313 return AE_OK;
314}
315
316static int acpi_button_install_notify_handlers(struct acpi_button *button)
317{
318 acpi_status status;
319
320 switch (button->type) {
321 case ACPI_BUTTON_TYPE_POWERF:
322 status =
323 acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
324 acpi_button_notify_fixed,
325 button);
326 break;
327 case ACPI_BUTTON_TYPE_SLEEPF:
328 status =
329 acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
330 acpi_button_notify_fixed,
331 button);
332 break;
333 default:
334 status = acpi_install_notify_handler(button->device->handle,
335 ACPI_DEVICE_NOTIFY,
336 acpi_button_notify,
337 button);
338 break;
339 }
340
341 return ACPI_FAILURE(status) ? -ENODEV : 0;
342}
343
344static int acpi_button_resume(struct acpi_device *device)
345{
346 struct acpi_button *button;
347 if (!device)
348 return -EINVAL;
349 button = acpi_driver_data(device);
350 if (button && button->type == ACPI_BUTTON_TYPE_LID)
351 return acpi_lid_send_state(button);
352 return 0;
353}
354
355static void acpi_button_remove_notify_handlers(struct acpi_button *button)
356{
357 switch (button->type) {
358 case ACPI_BUTTON_TYPE_POWERF:
359 acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
360 acpi_button_notify_fixed);
361 break;
362 case ACPI_BUTTON_TYPE_SLEEPF:
363 acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
364 acpi_button_notify_fixed);
365 break;
366 default:
367 acpi_remove_notify_handler(button->device->handle,
368 ACPI_DEVICE_NOTIFY,
369 acpi_button_notify);
370 break;
371 }
372}
373
374static int acpi_button_add(struct acpi_device *device)
375{
376 int error;
377 struct acpi_button *button;
378 struct input_dev *input;
379
380 if (!device)
381 return -EINVAL;
382
383 button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL);
384 if (!button)
385 return -ENOMEM;
386
387 button->device = device;
388 acpi_driver_data(device) = button;
389
390 button->input = input = input_allocate_device();
391 if (!input) {
392 error = -ENOMEM;
393 goto err_free_button;
394 }
395
396
397
398
399
400 if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) {
401 button->type = ACPI_BUTTON_TYPE_POWER;
402 strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_POWER);
403 sprintf(acpi_device_class(device), "%s/%s",
404 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
405 } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) {
406 button->type = ACPI_BUTTON_TYPE_POWERF;
407 strcpy(acpi_device_name(device),
408 ACPI_BUTTON_DEVICE_NAME_POWERF);
409 sprintf(acpi_device_class(device), "%s/%s",
410 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER);
411 } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) {
412 button->type = ACPI_BUTTON_TYPE_SLEEP;
413 strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_SLEEP);
414 sprintf(acpi_device_class(device), "%s/%s",
415 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
416 } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) {
417 button->type = ACPI_BUTTON_TYPE_SLEEPF;
418 strcpy(acpi_device_name(device),
419 ACPI_BUTTON_DEVICE_NAME_SLEEPF);
420 sprintf(acpi_device_class(device), "%s/%s",
421 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP);
422 } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) {
423 button->type = ACPI_BUTTON_TYPE_LID;
424 strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_LID);
425 sprintf(acpi_device_class(device), "%s/%s",
426 ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID);
427 } else {
428 printk(KERN_ERR PREFIX "Unsupported hid [%s]\n",
429 acpi_device_hid(device));
430 error = -ENODEV;
431 goto err_free_input;
432 }
433
434 error = acpi_button_add_fs(device);
435 if (error)
436 goto err_free_input;
437
438 error = acpi_button_install_notify_handlers(button);
439 if (error)
440 goto err_remove_fs;
441
442 snprintf(button->phys, sizeof(button->phys),
443 "%s/button/input0", acpi_device_hid(device));
444
445 input->name = acpi_device_name(device);
446 input->phys = button->phys;
447 input->id.bustype = BUS_HOST;
448 input->id.product = button->type;
449 input->dev.parent = &device->dev;
450
451 switch (button->type) {
452 case ACPI_BUTTON_TYPE_POWER:
453 case ACPI_BUTTON_TYPE_POWERF:
454 input->evbit[0] = BIT_MASK(EV_KEY);
455 set_bit(KEY_POWER, input->keybit);
456 break;
457
458 case ACPI_BUTTON_TYPE_SLEEP:
459 case ACPI_BUTTON_TYPE_SLEEPF:
460 input->evbit[0] = BIT_MASK(EV_KEY);
461 set_bit(KEY_SLEEP, input->keybit);
462 break;
463
464 case ACPI_BUTTON_TYPE_LID:
465 input->evbit[0] = BIT_MASK(EV_SW);
466 set_bit(SW_LID, input->swbit);
467 break;
468 }
469
470 error = input_register_device(input);
471 if (error)
472 goto err_remove_handlers;
473 if (button->type == ACPI_BUTTON_TYPE_LID)
474 acpi_lid_send_state(button);
475
476 if (device->wakeup.flags.valid) {
477
478 acpi_set_gpe_type(device->wakeup.gpe_device,
479 device->wakeup.gpe_number,
480 ACPI_GPE_TYPE_WAKE_RUN);
481 acpi_enable_gpe(device->wakeup.gpe_device,
482 device->wakeup.gpe_number, ACPI_NOT_ISR);
483 device->wakeup.state.enabled = 1;
484 }
485
486 printk(KERN_INFO PREFIX "%s [%s]\n",
487 acpi_device_name(device), acpi_device_bid(device));
488
489 return 0;
490
491 err_remove_handlers:
492 acpi_button_remove_notify_handlers(button);
493 err_remove_fs:
494 acpi_button_remove_fs(device);
495 err_free_input:
496 input_free_device(input);
497 err_free_button:
498 kfree(button);
499 return error;
500}
501
502static int acpi_button_remove(struct acpi_device *device, int type)
503{
504 struct acpi_button *button;
505
506 if (!device || !acpi_driver_data(device))
507 return -EINVAL;
508
509 button = acpi_driver_data(device);
510
511 acpi_button_remove_notify_handlers(button);
512 acpi_button_remove_fs(device);
513 input_unregister_device(button->input);
514 kfree(button);
515
516 return 0;
517}
518
519static int __init acpi_button_init(void)
520{
521 int result;
522
523 acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
524 if (!acpi_button_dir)
525 return -ENODEV;
526 acpi_button_dir->owner = THIS_MODULE;
527 result = acpi_bus_register_driver(&acpi_button_driver);
528 if (result < 0) {
529 remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
530 return -ENODEV;
531 }
532
533 return 0;
534}
535
536static void __exit acpi_button_exit(void)
537{
538 acpi_bus_unregister_driver(&acpi_button_driver);
539
540 if (acpi_power_dir)
541 remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
542 if (acpi_sleep_dir)
543 remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
544 if (acpi_lid_dir)
545 remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
546 remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
547}
548
549module_init(acpi_button_init);
550module_exit(acpi_button_exit);
551
