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1da177e4 LT |
1 | /* |
2 | * acpi_button.c - ACPI Button Driver ($Revision: 30 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
b34a8030 AS |
29 | #include <linux/types.h> |
30 | #include <linux/proc_fs.h> | |
31 | #include <linux/seq_file.h> | |
1da177e4 LT |
32 | #include <acpi/acpi_bus.h> |
33 | #include <acpi/acpi_drivers.h> | |
34 | ||
35 | ||
36 | #define ACPI_BUTTON_COMPONENT 0x00080000 | |
37 | #define ACPI_BUTTON_DRIVER_NAME "ACPI Button Driver" | |
38 | #define ACPI_BUTTON_CLASS "button" | |
b34a8030 AS |
39 | #define ACPI_BUTTON_FILE_INFO "info" |
40 | #define ACPI_BUTTON_FILE_STATE "state" | |
41 | #define ACPI_BUTTON_TYPE_UNKNOWN 0x00 | |
1da177e4 LT |
42 | #define ACPI_BUTTON_NOTIFY_STATUS 0x80 |
43 | ||
44 | #define ACPI_BUTTON_SUBCLASS_POWER "power" | |
45 | #define ACPI_BUTTON_HID_POWER "PNP0C0C" | |
46 | #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button (CM)" | |
47 | #define ACPI_BUTTON_DEVICE_NAME_POWERF "Power Button (FF)" | |
48 | #define ACPI_BUTTON_TYPE_POWER 0x01 | |
49 | #define ACPI_BUTTON_TYPE_POWERF 0x02 | |
50 | ||
51 | #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" | |
52 | #define ACPI_BUTTON_HID_SLEEP "PNP0C0E" | |
53 | #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button (CM)" | |
54 | #define ACPI_BUTTON_DEVICE_NAME_SLEEPF "Sleep Button (FF)" | |
55 | #define ACPI_BUTTON_TYPE_SLEEP 0x03 | |
56 | #define ACPI_BUTTON_TYPE_SLEEPF 0x04 | |
57 | ||
58 | #define ACPI_BUTTON_SUBCLASS_LID "lid" | |
59 | #define ACPI_BUTTON_HID_LID "PNP0C0D" | |
60 | #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" | |
61 | #define ACPI_BUTTON_TYPE_LID 0x05 | |
62 | ||
63 | #define _COMPONENT ACPI_BUTTON_COMPONENT | |
64 | ACPI_MODULE_NAME ("acpi_button") | |
65 | ||
66 | MODULE_AUTHOR("Paul Diefenbaugh"); | |
67 | MODULE_DESCRIPTION(ACPI_BUTTON_DRIVER_NAME); | |
68 | MODULE_LICENSE("GPL"); | |
69 | ||
70 | ||
71 | static int acpi_button_add (struct acpi_device *device); | |
72 | static int acpi_button_remove (struct acpi_device *device, int type); | |
b34a8030 AS |
73 | static int acpi_button_info_open_fs(struct inode *inode, struct file *file); |
74 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file); | |
1da177e4 LT |
75 | |
76 | static struct acpi_driver acpi_button_driver = { | |
77 | .name = ACPI_BUTTON_DRIVER_NAME, | |
78 | .class = ACPI_BUTTON_CLASS, | |
79 | .ids = "ACPI_FPB,ACPI_FSB,PNP0C0D,PNP0C0C,PNP0C0E", | |
80 | .ops = { | |
81 | .add = acpi_button_add, | |
82 | .remove = acpi_button_remove, | |
83 | }, | |
84 | }; | |
85 | ||
86 | struct acpi_button { | |
87 | acpi_handle handle; | |
88 | struct acpi_device *device; /* Fixed button kludge */ | |
89 | u8 type; | |
90 | unsigned long pushed; | |
91 | }; | |
92 | ||
b34a8030 AS |
93 | static struct file_operations acpi_button_info_fops = { |
94 | .open = acpi_button_info_open_fs, | |
95 | .read = seq_read, | |
96 | .llseek = seq_lseek, | |
97 | .release = single_release, | |
98 | }; | |
99 | ||
100 | static struct file_operations acpi_button_state_fops = { | |
101 | .open = acpi_button_state_open_fs, | |
102 | .read = seq_read, | |
103 | .llseek = seq_lseek, | |
104 | .release = single_release, | |
105 | }; | |
106 | /* -------------------------------------------------------------------------- | |
107 | FS Interface (/proc) | |
108 | -------------------------------------------------------------------------- */ | |
109 | ||
110 | static struct proc_dir_entry *acpi_button_dir; | |
111 | ||
112 | static int acpi_button_info_seq_show(struct seq_file *seq, void *offset) | |
113 | { | |
114 | struct acpi_button *button = (struct acpi_button *) seq->private; | |
115 | ||
116 | ACPI_FUNCTION_TRACE("acpi_button_info_seq_show"); | |
117 | ||
118 | if (!button || !button->device) | |
119 | return_VALUE(0); | |
120 | ||
121 | seq_printf(seq, "type: %s\n", | |
122 | acpi_device_name(button->device)); | |
123 | ||
124 | return_VALUE(0); | |
125 | } | |
126 | ||
127 | static int acpi_button_info_open_fs(struct inode *inode, struct file *file) | |
128 | { | |
129 | return single_open(file, acpi_button_info_seq_show, PDE(inode)->data); | |
130 | } | |
131 | ||
132 | static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) | |
133 | { | |
134 | struct acpi_button *button = (struct acpi_button *) seq->private; | |
135 | acpi_status status; | |
136 | unsigned long state; | |
137 | ||
138 | ACPI_FUNCTION_TRACE("acpi_button_state_seq_show"); | |
139 | ||
140 | if (!button || !button->device) | |
141 | return_VALUE(0); | |
142 | ||
143 | status = acpi_evaluate_integer(button->handle,"_LID",NULL,&state); | |
144 | if (ACPI_FAILURE(status)) { | |
145 | seq_printf(seq, "state: unsupported\n"); | |
146 | } | |
147 | else{ | |
148 | seq_printf(seq, "state: %s\n", (state ? "open" : "closed")); | |
149 | } | |
150 | ||
151 | return_VALUE(0); | |
152 | } | |
153 | ||
154 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file) | |
155 | { | |
156 | return single_open(file, acpi_button_state_seq_show, PDE(inode)->data); | |
157 | } | |
158 | ||
159 | static struct proc_dir_entry *acpi_power_dir; | |
160 | static struct proc_dir_entry *acpi_sleep_dir; | |
161 | static struct proc_dir_entry *acpi_lid_dir; | |
162 | ||
163 | static int | |
164 | acpi_button_add_fs ( | |
165 | struct acpi_device *device) | |
166 | { | |
167 | struct proc_dir_entry *entry = NULL; | |
168 | struct acpi_button *button = NULL; | |
169 | ||
170 | ACPI_FUNCTION_TRACE("acpi_button_add_fs"); | |
171 | ||
172 | if (!device || !acpi_driver_data(device)) | |
173 | return_VALUE(-EINVAL); | |
174 | ||
175 | button = acpi_driver_data(device); | |
176 | ||
177 | switch (button->type) { | |
178 | case ACPI_BUTTON_TYPE_POWER: | |
179 | case ACPI_BUTTON_TYPE_POWERF: | |
180 | if (!acpi_power_dir) | |
181 | acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER, | |
182 | acpi_button_dir); | |
183 | entry = acpi_power_dir; | |
184 | break; | |
185 | case ACPI_BUTTON_TYPE_SLEEP: | |
186 | case ACPI_BUTTON_TYPE_SLEEPF: | |
187 | if (!acpi_sleep_dir) | |
188 | acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP, | |
189 | acpi_button_dir); | |
190 | entry = acpi_sleep_dir; | |
191 | break; | |
192 | case ACPI_BUTTON_TYPE_LID: | |
193 | if (!acpi_lid_dir) | |
194 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, | |
195 | acpi_button_dir); | |
196 | entry = acpi_lid_dir; | |
197 | break; | |
198 | } | |
199 | ||
200 | if (!entry) | |
201 | return_VALUE(-ENODEV); | |
202 | entry->owner = THIS_MODULE; | |
203 | ||
204 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry); | |
205 | if (!acpi_device_dir(device)) | |
206 | return_VALUE(-ENODEV); | |
207 | acpi_device_dir(device)->owner = THIS_MODULE; | |
208 | ||
209 | /* 'info' [R] */ | |
210 | entry = create_proc_entry(ACPI_BUTTON_FILE_INFO, | |
211 | S_IRUGO, acpi_device_dir(device)); | |
212 | if (!entry) | |
213 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
214 | "Unable to create '%s' fs entry\n", | |
215 | ACPI_BUTTON_FILE_INFO)); | |
216 | else { | |
217 | entry->proc_fops = &acpi_button_info_fops; | |
218 | entry->data = acpi_driver_data(device); | |
219 | entry->owner = THIS_MODULE; | |
220 | } | |
221 | ||
222 | /* show lid state [R] */ | |
223 | if (button->type == ACPI_BUTTON_TYPE_LID) { | |
224 | entry = create_proc_entry(ACPI_BUTTON_FILE_STATE, | |
225 | S_IRUGO, acpi_device_dir(device)); | |
226 | if (!entry) | |
227 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
228 | "Unable to create '%s' fs entry\n", | |
229 | ACPI_BUTTON_FILE_INFO)); | |
230 | else { | |
231 | entry->proc_fops = &acpi_button_state_fops; | |
232 | entry->data = acpi_driver_data(device); | |
233 | entry->owner = THIS_MODULE; | |
234 | } | |
235 | } | |
236 | ||
237 | return_VALUE(0); | |
238 | } | |
239 | ||
240 | ||
241 | static int | |
242 | acpi_button_remove_fs ( | |
243 | struct acpi_device *device) | |
244 | { | |
245 | struct acpi_button *button = NULL; | |
246 | ||
247 | ACPI_FUNCTION_TRACE("acpi_button_remove_fs"); | |
248 | ||
249 | button = acpi_driver_data(device); | |
250 | if (acpi_device_dir(device)) { | |
251 | if (button->type == ACPI_BUTTON_TYPE_LID) | |
252 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, | |
253 | acpi_device_dir(device)); | |
254 | remove_proc_entry(ACPI_BUTTON_FILE_INFO, | |
255 | acpi_device_dir(device)); | |
256 | ||
257 | remove_proc_entry(acpi_device_bid(device), | |
258 | acpi_device_dir(device)->parent); | |
259 | acpi_device_dir(device) = NULL; | |
260 | } | |
261 | ||
262 | return_VALUE(0); | |
263 | } | |
264 | ||
265 | ||
1da177e4 LT |
266 | /* -------------------------------------------------------------------------- |
267 | Driver Interface | |
268 | -------------------------------------------------------------------------- */ | |
269 | ||
270 | static void | |
271 | acpi_button_notify ( | |
272 | acpi_handle handle, | |
273 | u32 event, | |
274 | void *data) | |
275 | { | |
276 | struct acpi_button *button = (struct acpi_button *) data; | |
277 | ||
278 | ACPI_FUNCTION_TRACE("acpi_button_notify"); | |
279 | ||
280 | if (!button || !button->device) | |
281 | return_VOID; | |
282 | ||
283 | switch (event) { | |
284 | case ACPI_BUTTON_NOTIFY_STATUS: | |
285 | acpi_bus_generate_event(button->device, event, ++button->pushed); | |
286 | break; | |
287 | default: | |
288 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
289 | "Unsupported event [0x%x]\n", event)); | |
290 | break; | |
291 | } | |
292 | ||
293 | return_VOID; | |
294 | } | |
295 | ||
296 | ||
297 | static acpi_status | |
298 | acpi_button_notify_fixed ( | |
299 | void *data) | |
300 | { | |
301 | struct acpi_button *button = (struct acpi_button *) data; | |
302 | ||
303 | ACPI_FUNCTION_TRACE("acpi_button_notify_fixed"); | |
304 | ||
b34a8030 AS |
305 | if (!button) |
306 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
307 | |
308 | acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button); | |
309 | ||
310 | return_ACPI_STATUS(AE_OK); | |
311 | } | |
312 | ||
313 | ||
314 | static int | |
315 | acpi_button_add ( | |
316 | struct acpi_device *device) | |
317 | { | |
318 | int result = 0; | |
319 | acpi_status status = AE_OK; | |
320 | struct acpi_button *button = NULL; | |
321 | ||
1da177e4 LT |
322 | ACPI_FUNCTION_TRACE("acpi_button_add"); |
323 | ||
324 | if (!device) | |
325 | return_VALUE(-EINVAL); | |
326 | ||
327 | button = kmalloc(sizeof(struct acpi_button), GFP_KERNEL); | |
328 | if (!button) | |
329 | return_VALUE(-ENOMEM); | |
330 | memset(button, 0, sizeof(struct acpi_button)); | |
331 | ||
332 | button->device = device; | |
333 | button->handle = device->handle; | |
334 | acpi_driver_data(device) = button; | |
335 | ||
336 | /* | |
337 | * Determine the button type (via hid), as fixed-feature buttons | |
338 | * need to be handled a bit differently than generic-space. | |
339 | */ | |
340 | if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) { | |
341 | button->type = ACPI_BUTTON_TYPE_POWER; | |
342 | strcpy(acpi_device_name(device), | |
343 | ACPI_BUTTON_DEVICE_NAME_POWER); | |
344 | sprintf(acpi_device_class(device), "%s/%s", | |
345 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); | |
346 | } | |
347 | else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) { | |
348 | button->type = ACPI_BUTTON_TYPE_POWERF; | |
349 | strcpy(acpi_device_name(device), | |
350 | ACPI_BUTTON_DEVICE_NAME_POWERF); | |
351 | sprintf(acpi_device_class(device), "%s/%s", | |
352 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); | |
353 | } | |
354 | else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) { | |
355 | button->type = ACPI_BUTTON_TYPE_SLEEP; | |
356 | strcpy(acpi_device_name(device), | |
357 | ACPI_BUTTON_DEVICE_NAME_SLEEP); | |
358 | sprintf(acpi_device_class(device), "%s/%s", | |
359 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); | |
360 | } | |
361 | else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) { | |
362 | button->type = ACPI_BUTTON_TYPE_SLEEPF; | |
363 | strcpy(acpi_device_name(device), | |
364 | ACPI_BUTTON_DEVICE_NAME_SLEEPF); | |
365 | sprintf(acpi_device_class(device), "%s/%s", | |
366 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); | |
367 | } | |
368 | else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) { | |
369 | button->type = ACPI_BUTTON_TYPE_LID; | |
370 | strcpy(acpi_device_name(device), | |
371 | ACPI_BUTTON_DEVICE_NAME_LID); | |
372 | sprintf(acpi_device_class(device), "%s/%s", | |
373 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); | |
374 | } | |
375 | else { | |
376 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unsupported hid [%s]\n", | |
377 | acpi_device_hid(device))); | |
378 | result = -ENODEV; | |
379 | goto end; | |
380 | } | |
381 | ||
b34a8030 AS |
382 | result = acpi_button_add_fs(device); |
383 | if (result) | |
384 | goto end; | |
385 | ||
1da177e4 LT |
386 | switch (button->type) { |
387 | case ACPI_BUTTON_TYPE_POWERF: | |
388 | status = acpi_install_fixed_event_handler ( | |
389 | ACPI_EVENT_POWER_BUTTON, | |
390 | acpi_button_notify_fixed, | |
391 | button); | |
392 | break; | |
393 | case ACPI_BUTTON_TYPE_SLEEPF: | |
394 | status = acpi_install_fixed_event_handler ( | |
395 | ACPI_EVENT_SLEEP_BUTTON, | |
396 | acpi_button_notify_fixed, | |
397 | button); | |
398 | break; | |
399 | default: | |
400 | status = acpi_install_notify_handler ( | |
401 | button->handle, | |
402 | ACPI_DEVICE_NOTIFY, | |
403 | acpi_button_notify, | |
404 | button); | |
405 | break; | |
406 | } | |
407 | ||
408 | if (ACPI_FAILURE(status)) { | |
409 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
410 | "Error installing notify handler\n")); | |
411 | result = -ENODEV; | |
412 | goto end; | |
413 | } | |
414 | ||
415 | if (device->wakeup.flags.valid) { | |
416 | /* Button's GPE is run-wake GPE */ | |
417 | acpi_set_gpe_type(device->wakeup.gpe_device, | |
418 | device->wakeup.gpe_number, ACPI_GPE_TYPE_WAKE_RUN); | |
419 | acpi_enable_gpe(device->wakeup.gpe_device, | |
420 | device->wakeup.gpe_number, ACPI_NOT_ISR); | |
421 | device->wakeup.state.enabled = 1; | |
422 | } | |
423 | ||
424 | printk(KERN_INFO PREFIX "%s [%s]\n", | |
425 | acpi_device_name(device), acpi_device_bid(device)); | |
426 | ||
427 | end: | |
428 | if (result) { | |
b34a8030 | 429 | acpi_button_remove_fs(device); |
1da177e4 LT |
430 | kfree(button); |
431 | } | |
432 | ||
433 | return_VALUE(result); | |
434 | } | |
435 | ||
436 | ||
437 | static int | |
438 | acpi_button_remove (struct acpi_device *device, int type) | |
439 | { | |
440 | acpi_status status = 0; | |
441 | struct acpi_button *button = NULL; | |
442 | ||
443 | ACPI_FUNCTION_TRACE("acpi_button_remove"); | |
444 | ||
445 | if (!device || !acpi_driver_data(device)) | |
446 | return_VALUE(-EINVAL); | |
447 | ||
448 | button = acpi_driver_data(device); | |
449 | ||
450 | /* Unregister for device notifications. */ | |
451 | switch (button->type) { | |
452 | case ACPI_BUTTON_TYPE_POWERF: | |
453 | status = acpi_remove_fixed_event_handler( | |
454 | ACPI_EVENT_POWER_BUTTON, acpi_button_notify_fixed); | |
455 | break; | |
456 | case ACPI_BUTTON_TYPE_SLEEPF: | |
457 | status = acpi_remove_fixed_event_handler( | |
458 | ACPI_EVENT_SLEEP_BUTTON, acpi_button_notify_fixed); | |
459 | break; | |
460 | default: | |
461 | status = acpi_remove_notify_handler(button->handle, | |
462 | ACPI_DEVICE_NOTIFY, acpi_button_notify); | |
463 | break; | |
464 | } | |
465 | ||
466 | if (ACPI_FAILURE(status)) | |
467 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
468 | "Error removing notify handler\n")); | |
469 | ||
b34a8030 AS |
470 | acpi_button_remove_fs(device); |
471 | ||
1da177e4 LT |
472 | kfree(button); |
473 | ||
474 | return_VALUE(0); | |
475 | } | |
476 | ||
477 | ||
478 | static int __init | |
479 | acpi_button_init (void) | |
480 | { | |
481 | int result = 0; | |
482 | ||
483 | ACPI_FUNCTION_TRACE("acpi_button_init"); | |
484 | ||
b34a8030 AS |
485 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); |
486 | if (!acpi_button_dir) | |
487 | return_VALUE(-ENODEV); | |
488 | acpi_button_dir->owner = THIS_MODULE; | |
1da177e4 LT |
489 | result = acpi_bus_register_driver(&acpi_button_driver); |
490 | if (result < 0) { | |
b34a8030 | 491 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
1da177e4 LT |
492 | return_VALUE(-ENODEV); |
493 | } | |
494 | ||
495 | return_VALUE(0); | |
496 | } | |
497 | ||
b34a8030 | 498 | |
1da177e4 LT |
499 | static void __exit |
500 | acpi_button_exit (void) | |
501 | { | |
502 | ACPI_FUNCTION_TRACE("acpi_button_exit"); | |
503 | ||
504 | acpi_bus_unregister_driver(&acpi_button_driver); | |
505 | ||
b34a8030 AS |
506 | if (acpi_power_dir) |
507 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir); | |
508 | if (acpi_sleep_dir) | |
509 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir); | |
510 | if (acpi_lid_dir) | |
511 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
512 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
513 | ||
1da177e4 LT |
514 | return_VOID; |
515 | } | |
516 | ||
b34a8030 | 517 | |
1da177e4 LT |
518 | module_init(acpi_button_init); |
519 | module_exit(acpi_button_exit); |