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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 | ||
1da177e4 LT |
35 | #define ACPI_BUTTON_COMPONENT 0x00080000 |
36 | #define ACPI_BUTTON_DRIVER_NAME "ACPI Button Driver" | |
37 | #define ACPI_BUTTON_CLASS "button" | |
b34a8030 AS |
38 | #define ACPI_BUTTON_FILE_INFO "info" |
39 | #define ACPI_BUTTON_FILE_STATE "state" | |
40 | #define ACPI_BUTTON_TYPE_UNKNOWN 0x00 | |
1da177e4 LT |
41 | #define ACPI_BUTTON_NOTIFY_STATUS 0x80 |
42 | ||
43 | #define ACPI_BUTTON_SUBCLASS_POWER "power" | |
4be44fcd | 44 | #define ACPI_BUTTON_HID_POWER "PNP0C0C" |
1da177e4 LT |
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 | |
4be44fcd | 63 | ACPI_MODULE_NAME("acpi_button") |
1da177e4 | 64 | |
4be44fcd | 65 | MODULE_AUTHOR("Paul Diefenbaugh"); |
1da177e4 LT |
66 | MODULE_DESCRIPTION(ACPI_BUTTON_DRIVER_NAME); |
67 | MODULE_LICENSE("GPL"); | |
68 | ||
4be44fcd LB |
69 | static int acpi_button_add(struct acpi_device *device); |
70 | static int acpi_button_remove(struct acpi_device *device, int type); | |
b34a8030 AS |
71 | static int acpi_button_info_open_fs(struct inode *inode, struct file *file); |
72 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file); | |
1da177e4 LT |
73 | |
74 | static struct acpi_driver acpi_button_driver = { | |
4be44fcd LB |
75 | .name = ACPI_BUTTON_DRIVER_NAME, |
76 | .class = ACPI_BUTTON_CLASS, | |
77 | .ids = "ACPI_FPB,ACPI_FSB,PNP0C0D,PNP0C0C,PNP0C0E", | |
78 | .ops = { | |
79 | .add = acpi_button_add, | |
80 | .remove = acpi_button_remove, | |
81 | }, | |
1da177e4 LT |
82 | }; |
83 | ||
84 | struct acpi_button { | |
4be44fcd LB |
85 | acpi_handle handle; |
86 | struct acpi_device *device; /* Fixed button kludge */ | |
87 | u8 type; | |
88 | unsigned long pushed; | |
1da177e4 LT |
89 | }; |
90 | ||
b34a8030 | 91 | static struct file_operations acpi_button_info_fops = { |
4be44fcd LB |
92 | .open = acpi_button_info_open_fs, |
93 | .read = seq_read, | |
94 | .llseek = seq_lseek, | |
95 | .release = single_release, | |
b34a8030 AS |
96 | }; |
97 | ||
98 | static struct file_operations acpi_button_state_fops = { | |
4be44fcd LB |
99 | .open = acpi_button_state_open_fs, |
100 | .read = seq_read, | |
101 | .llseek = seq_lseek, | |
102 | .release = single_release, | |
b34a8030 | 103 | }; |
4be44fcd | 104 | |
b34a8030 AS |
105 | /* -------------------------------------------------------------------------- |
106 | FS Interface (/proc) | |
107 | -------------------------------------------------------------------------- */ | |
108 | ||
4be44fcd | 109 | static struct proc_dir_entry *acpi_button_dir; |
b34a8030 AS |
110 | |
111 | static int acpi_button_info_seq_show(struct seq_file *seq, void *offset) | |
112 | { | |
4be44fcd | 113 | struct acpi_button *button = (struct acpi_button *)seq->private; |
b34a8030 AS |
114 | |
115 | ACPI_FUNCTION_TRACE("acpi_button_info_seq_show"); | |
116 | ||
117 | if (!button || !button->device) | |
118 | return_VALUE(0); | |
119 | ||
4be44fcd LB |
120 | seq_printf(seq, "type: %s\n", |
121 | acpi_device_name(button->device)); | |
b34a8030 AS |
122 | |
123 | return_VALUE(0); | |
124 | } | |
125 | ||
126 | static int acpi_button_info_open_fs(struct inode *inode, struct file *file) | |
127 | { | |
128 | return single_open(file, acpi_button_info_seq_show, PDE(inode)->data); | |
129 | } | |
4be44fcd | 130 | |
b34a8030 AS |
131 | static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) |
132 | { | |
4be44fcd LB |
133 | struct acpi_button *button = (struct acpi_button *)seq->private; |
134 | acpi_status status; | |
135 | unsigned long state; | |
b34a8030 AS |
136 | |
137 | ACPI_FUNCTION_TRACE("acpi_button_state_seq_show"); | |
138 | ||
139 | if (!button || !button->device) | |
140 | return_VALUE(0); | |
141 | ||
4be44fcd | 142 | status = acpi_evaluate_integer(button->handle, "_LID", NULL, &state); |
b34a8030 AS |
143 | if (ACPI_FAILURE(status)) { |
144 | seq_printf(seq, "state: unsupported\n"); | |
4be44fcd LB |
145 | } else { |
146 | seq_printf(seq, "state: %s\n", | |
147 | (state ? "open" : "closed")); | |
b34a8030 AS |
148 | } |
149 | ||
150 | return_VALUE(0); | |
151 | } | |
152 | ||
153 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file) | |
154 | { | |
155 | return single_open(file, acpi_button_state_seq_show, PDE(inode)->data); | |
156 | } | |
157 | ||
158 | static struct proc_dir_entry *acpi_power_dir; | |
159 | static struct proc_dir_entry *acpi_sleep_dir; | |
160 | static struct proc_dir_entry *acpi_lid_dir; | |
161 | ||
4be44fcd | 162 | static int acpi_button_add_fs(struct acpi_device *device) |
b34a8030 | 163 | { |
4be44fcd LB |
164 | struct proc_dir_entry *entry = NULL; |
165 | struct acpi_button *button = NULL; | |
b34a8030 AS |
166 | |
167 | ACPI_FUNCTION_TRACE("acpi_button_add_fs"); | |
168 | ||
169 | if (!device || !acpi_driver_data(device)) | |
170 | return_VALUE(-EINVAL); | |
171 | ||
172 | button = acpi_driver_data(device); | |
173 | ||
174 | switch (button->type) { | |
175 | case ACPI_BUTTON_TYPE_POWER: | |
176 | case ACPI_BUTTON_TYPE_POWERF: | |
177 | if (!acpi_power_dir) | |
4be44fcd LB |
178 | acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER, |
179 | acpi_button_dir); | |
b34a8030 AS |
180 | entry = acpi_power_dir; |
181 | break; | |
182 | case ACPI_BUTTON_TYPE_SLEEP: | |
183 | case ACPI_BUTTON_TYPE_SLEEPF: | |
184 | if (!acpi_sleep_dir) | |
4be44fcd LB |
185 | acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP, |
186 | acpi_button_dir); | |
b34a8030 AS |
187 | entry = acpi_sleep_dir; |
188 | break; | |
189 | case ACPI_BUTTON_TYPE_LID: | |
190 | if (!acpi_lid_dir) | |
4be44fcd LB |
191 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, |
192 | acpi_button_dir); | |
b34a8030 AS |
193 | entry = acpi_lid_dir; |
194 | break; | |
195 | } | |
196 | ||
197 | if (!entry) | |
198 | return_VALUE(-ENODEV); | |
199 | entry->owner = THIS_MODULE; | |
200 | ||
201 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry); | |
202 | if (!acpi_device_dir(device)) | |
203 | return_VALUE(-ENODEV); | |
204 | acpi_device_dir(device)->owner = THIS_MODULE; | |
205 | ||
206 | /* 'info' [R] */ | |
207 | entry = create_proc_entry(ACPI_BUTTON_FILE_INFO, | |
4be44fcd | 208 | S_IRUGO, acpi_device_dir(device)); |
b34a8030 AS |
209 | if (!entry) |
210 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
4be44fcd LB |
211 | "Unable to create '%s' fs entry\n", |
212 | ACPI_BUTTON_FILE_INFO)); | |
b34a8030 AS |
213 | else { |
214 | entry->proc_fops = &acpi_button_info_fops; | |
215 | entry->data = acpi_driver_data(device); | |
216 | entry->owner = THIS_MODULE; | |
217 | } | |
218 | ||
219 | /* show lid state [R] */ | |
220 | if (button->type == ACPI_BUTTON_TYPE_LID) { | |
221 | entry = create_proc_entry(ACPI_BUTTON_FILE_STATE, | |
4be44fcd | 222 | S_IRUGO, acpi_device_dir(device)); |
b34a8030 AS |
223 | if (!entry) |
224 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
4be44fcd LB |
225 | "Unable to create '%s' fs entry\n", |
226 | ACPI_BUTTON_FILE_INFO)); | |
b34a8030 AS |
227 | else { |
228 | entry->proc_fops = &acpi_button_state_fops; | |
229 | entry->data = acpi_driver_data(device); | |
230 | entry->owner = THIS_MODULE; | |
231 | } | |
232 | } | |
233 | ||
234 | return_VALUE(0); | |
235 | } | |
236 | ||
4be44fcd | 237 | static int acpi_button_remove_fs(struct acpi_device *device) |
b34a8030 | 238 | { |
4be44fcd | 239 | struct acpi_button *button = NULL; |
b34a8030 AS |
240 | |
241 | ACPI_FUNCTION_TRACE("acpi_button_remove_fs"); | |
242 | ||
243 | button = acpi_driver_data(device); | |
244 | if (acpi_device_dir(device)) { | |
245 | if (button->type == ACPI_BUTTON_TYPE_LID) | |
246 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, | |
4be44fcd | 247 | acpi_device_dir(device)); |
b34a8030 | 248 | remove_proc_entry(ACPI_BUTTON_FILE_INFO, |
4be44fcd | 249 | acpi_device_dir(device)); |
b34a8030 AS |
250 | |
251 | remove_proc_entry(acpi_device_bid(device), | |
4be44fcd | 252 | acpi_device_dir(device)->parent); |
b34a8030 AS |
253 | acpi_device_dir(device) = NULL; |
254 | } | |
255 | ||
256 | return_VALUE(0); | |
257 | } | |
258 | ||
1da177e4 LT |
259 | /* -------------------------------------------------------------------------- |
260 | Driver Interface | |
261 | -------------------------------------------------------------------------- */ | |
262 | ||
4be44fcd | 263 | static void acpi_button_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 264 | { |
4be44fcd | 265 | struct acpi_button *button = (struct acpi_button *)data; |
1da177e4 LT |
266 | |
267 | ACPI_FUNCTION_TRACE("acpi_button_notify"); | |
268 | ||
269 | if (!button || !button->device) | |
270 | return_VOID; | |
271 | ||
272 | switch (event) { | |
273 | case ACPI_BUTTON_NOTIFY_STATUS: | |
4be44fcd LB |
274 | acpi_bus_generate_event(button->device, event, |
275 | ++button->pushed); | |
1da177e4 LT |
276 | break; |
277 | default: | |
278 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 279 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
280 | break; |
281 | } | |
282 | ||
283 | return_VOID; | |
284 | } | |
285 | ||
4be44fcd | 286 | static acpi_status acpi_button_notify_fixed(void *data) |
1da177e4 | 287 | { |
4be44fcd LB |
288 | struct acpi_button *button = (struct acpi_button *)data; |
289 | ||
1da177e4 LT |
290 | ACPI_FUNCTION_TRACE("acpi_button_notify_fixed"); |
291 | ||
b34a8030 AS |
292 | if (!button) |
293 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
1da177e4 LT |
294 | |
295 | acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button); | |
296 | ||
297 | return_ACPI_STATUS(AE_OK); | |
298 | } | |
299 | ||
4be44fcd | 300 | static int acpi_button_add(struct acpi_device *device) |
1da177e4 | 301 | { |
4be44fcd LB |
302 | int result = 0; |
303 | acpi_status status = AE_OK; | |
304 | struct acpi_button *button = NULL; | |
1da177e4 | 305 | |
1da177e4 LT |
306 | ACPI_FUNCTION_TRACE("acpi_button_add"); |
307 | ||
308 | if (!device) | |
309 | return_VALUE(-EINVAL); | |
310 | ||
311 | button = kmalloc(sizeof(struct acpi_button), GFP_KERNEL); | |
312 | if (!button) | |
313 | return_VALUE(-ENOMEM); | |
314 | memset(button, 0, sizeof(struct acpi_button)); | |
315 | ||
316 | button->device = device; | |
317 | button->handle = device->handle; | |
318 | acpi_driver_data(device) = button; | |
319 | ||
320 | /* | |
321 | * Determine the button type (via hid), as fixed-feature buttons | |
322 | * need to be handled a bit differently than generic-space. | |
323 | */ | |
324 | if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) { | |
325 | button->type = ACPI_BUTTON_TYPE_POWER; | |
4be44fcd LB |
326 | strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_POWER); |
327 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 328 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
4be44fcd | 329 | } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) { |
1da177e4 LT |
330 | button->type = ACPI_BUTTON_TYPE_POWERF; |
331 | strcpy(acpi_device_name(device), | |
4be44fcd LB |
332 | ACPI_BUTTON_DEVICE_NAME_POWERF); |
333 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 334 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
4be44fcd | 335 | } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) { |
1da177e4 | 336 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
4be44fcd LB |
337 | strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_SLEEP); |
338 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 339 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
4be44fcd | 340 | } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) { |
1da177e4 LT |
341 | button->type = ACPI_BUTTON_TYPE_SLEEPF; |
342 | strcpy(acpi_device_name(device), | |
4be44fcd LB |
343 | ACPI_BUTTON_DEVICE_NAME_SLEEPF); |
344 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 345 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
4be44fcd | 346 | } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) { |
1da177e4 | 347 | button->type = ACPI_BUTTON_TYPE_LID; |
4be44fcd LB |
348 | strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_LID); |
349 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 350 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
4be44fcd | 351 | } else { |
1da177e4 | 352 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unsupported hid [%s]\n", |
4be44fcd | 353 | acpi_device_hid(device))); |
1da177e4 LT |
354 | result = -ENODEV; |
355 | goto end; | |
356 | } | |
357 | ||
b34a8030 AS |
358 | result = acpi_button_add_fs(device); |
359 | if (result) | |
360 | goto end; | |
361 | ||
1da177e4 LT |
362 | switch (button->type) { |
363 | case ACPI_BUTTON_TYPE_POWERF: | |
4be44fcd LB |
364 | status = |
365 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
366 | acpi_button_notify_fixed, | |
367 | button); | |
1da177e4 LT |
368 | break; |
369 | case ACPI_BUTTON_TYPE_SLEEPF: | |
4be44fcd LB |
370 | status = |
371 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
372 | acpi_button_notify_fixed, | |
373 | button); | |
1da177e4 LT |
374 | break; |
375 | default: | |
4be44fcd LB |
376 | status = acpi_install_notify_handler(button->handle, |
377 | ACPI_DEVICE_NOTIFY, | |
378 | acpi_button_notify, | |
379 | button); | |
1da177e4 LT |
380 | break; |
381 | } | |
382 | ||
383 | if (ACPI_FAILURE(status)) { | |
384 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
4be44fcd | 385 | "Error installing notify handler\n")); |
1da177e4 LT |
386 | result = -ENODEV; |
387 | goto end; | |
388 | } | |
389 | ||
390 | if (device->wakeup.flags.valid) { | |
391 | /* Button's GPE is run-wake GPE */ | |
4be44fcd LB |
392 | acpi_set_gpe_type(device->wakeup.gpe_device, |
393 | device->wakeup.gpe_number, | |
394 | ACPI_GPE_TYPE_WAKE_RUN); | |
395 | acpi_enable_gpe(device->wakeup.gpe_device, | |
396 | device->wakeup.gpe_number, ACPI_NOT_ISR); | |
1da177e4 LT |
397 | device->wakeup.state.enabled = 1; |
398 | } | |
399 | ||
4be44fcd LB |
400 | printk(KERN_INFO PREFIX "%s [%s]\n", |
401 | acpi_device_name(device), acpi_device_bid(device)); | |
1da177e4 | 402 | |
4be44fcd | 403 | end: |
1da177e4 | 404 | if (result) { |
b34a8030 | 405 | acpi_button_remove_fs(device); |
1da177e4 LT |
406 | kfree(button); |
407 | } | |
408 | ||
409 | return_VALUE(result); | |
410 | } | |
411 | ||
4be44fcd | 412 | static int acpi_button_remove(struct acpi_device *device, int type) |
1da177e4 | 413 | { |
4be44fcd LB |
414 | acpi_status status = 0; |
415 | struct acpi_button *button = NULL; | |
1da177e4 LT |
416 | |
417 | ACPI_FUNCTION_TRACE("acpi_button_remove"); | |
418 | ||
419 | if (!device || !acpi_driver_data(device)) | |
420 | return_VALUE(-EINVAL); | |
421 | ||
422 | button = acpi_driver_data(device); | |
423 | ||
424 | /* Unregister for device notifications. */ | |
425 | switch (button->type) { | |
426 | case ACPI_BUTTON_TYPE_POWERF: | |
4be44fcd LB |
427 | status = |
428 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
429 | acpi_button_notify_fixed); | |
1da177e4 LT |
430 | break; |
431 | case ACPI_BUTTON_TYPE_SLEEPF: | |
4be44fcd LB |
432 | status = |
433 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
434 | acpi_button_notify_fixed); | |
1da177e4 LT |
435 | break; |
436 | default: | |
437 | status = acpi_remove_notify_handler(button->handle, | |
4be44fcd LB |
438 | ACPI_DEVICE_NOTIFY, |
439 | acpi_button_notify); | |
1da177e4 LT |
440 | break; |
441 | } | |
442 | ||
443 | if (ACPI_FAILURE(status)) | |
444 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
4be44fcd | 445 | "Error removing notify handler\n")); |
1da177e4 | 446 | |
4be44fcd | 447 | acpi_button_remove_fs(device); |
b34a8030 | 448 | |
1da177e4 LT |
449 | kfree(button); |
450 | ||
451 | return_VALUE(0); | |
452 | } | |
453 | ||
4be44fcd | 454 | static int __init acpi_button_init(void) |
1da177e4 | 455 | { |
4be44fcd | 456 | int result = 0; |
1da177e4 LT |
457 | |
458 | ACPI_FUNCTION_TRACE("acpi_button_init"); | |
459 | ||
b34a8030 AS |
460 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); |
461 | if (!acpi_button_dir) | |
462 | return_VALUE(-ENODEV); | |
463 | acpi_button_dir->owner = THIS_MODULE; | |
1da177e4 LT |
464 | result = acpi_bus_register_driver(&acpi_button_driver); |
465 | if (result < 0) { | |
b34a8030 | 466 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
1da177e4 LT |
467 | return_VALUE(-ENODEV); |
468 | } | |
469 | ||
470 | return_VALUE(0); | |
471 | } | |
472 | ||
4be44fcd | 473 | static void __exit acpi_button_exit(void) |
1da177e4 LT |
474 | { |
475 | ACPI_FUNCTION_TRACE("acpi_button_exit"); | |
476 | ||
477 | acpi_bus_unregister_driver(&acpi_button_driver); | |
478 | ||
4be44fcd | 479 | if (acpi_power_dir) |
b34a8030 AS |
480 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir); |
481 | if (acpi_sleep_dir) | |
482 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir); | |
483 | if (acpi_lid_dir) | |
484 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
485 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
486 | ||
1da177e4 LT |
487 | return_VOID; |
488 | } | |
489 | ||
1da177e4 LT |
490 | module_init(acpi_button_init); |
491 | module_exit(acpi_button_exit); |