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Commit | Line | Data |
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1da177e4 | 1 | /* |
50a4da89 | 2 | * button.c - ACPI Button Driver |
1da177e4 LT |
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> | |
c0968f0e | 32 | #include <linux/input.h> |
1da177e4 LT |
33 | #include <acpi/acpi_bus.h> |
34 | #include <acpi/acpi_drivers.h> | |
35 | ||
1da177e4 | 36 | #define ACPI_BUTTON_CLASS "button" |
b34a8030 AS |
37 | #define ACPI_BUTTON_FILE_INFO "info" |
38 | #define ACPI_BUTTON_FILE_STATE "state" | |
39 | #define ACPI_BUTTON_TYPE_UNKNOWN 0x00 | |
1da177e4 LT |
40 | #define ACPI_BUTTON_NOTIFY_STATUS 0x80 |
41 | ||
42 | #define ACPI_BUTTON_SUBCLASS_POWER "power" | |
4be44fcd | 43 | #define ACPI_BUTTON_HID_POWER "PNP0C0C" |
1da177e4 LT |
44 | #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button (CM)" |
45 | #define ACPI_BUTTON_DEVICE_NAME_POWERF "Power Button (FF)" | |
46 | #define ACPI_BUTTON_TYPE_POWER 0x01 | |
47 | #define ACPI_BUTTON_TYPE_POWERF 0x02 | |
48 | ||
49 | #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" | |
50 | #define ACPI_BUTTON_HID_SLEEP "PNP0C0E" | |
51 | #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button (CM)" | |
52 | #define ACPI_BUTTON_DEVICE_NAME_SLEEPF "Sleep Button (FF)" | |
53 | #define ACPI_BUTTON_TYPE_SLEEP 0x03 | |
54 | #define ACPI_BUTTON_TYPE_SLEEPF 0x04 | |
55 | ||
56 | #define ACPI_BUTTON_SUBCLASS_LID "lid" | |
57 | #define ACPI_BUTTON_HID_LID "PNP0C0D" | |
58 | #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" | |
59 | #define ACPI_BUTTON_TYPE_LID 0x05 | |
60 | ||
61 | #define _COMPONENT ACPI_BUTTON_COMPONENT | |
f52fd66d | 62 | ACPI_MODULE_NAME("button"); |
1da177e4 | 63 | |
c0968f0e | 64 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 65 | MODULE_DESCRIPTION("ACPI Button Driver"); |
1da177e4 LT |
66 | MODULE_LICENSE("GPL"); |
67 | ||
1ba90e3a TR |
68 | static const struct acpi_device_id button_device_ids[] = { |
69 | {ACPI_BUTTON_HID_LID, 0}, | |
70 | {ACPI_BUTTON_HID_SLEEP, 0}, | |
71 | {ACPI_BUTTON_HID_SLEEPF, 0}, | |
72 | {ACPI_BUTTON_HID_POWER, 0}, | |
73 | {ACPI_BUTTON_HID_POWERF, 0}, | |
74 | {"", 0}, | |
75 | }; | |
76 | MODULE_DEVICE_TABLE(acpi, button_device_ids); | |
77 | ||
4be44fcd LB |
78 | static int acpi_button_add(struct acpi_device *device); |
79 | static int acpi_button_remove(struct acpi_device *device, int type); | |
23de5d9e | 80 | static int acpi_button_resume(struct acpi_device *device); |
373cfc36 | 81 | static void acpi_button_notify(struct acpi_device *device, u32 event); |
b34a8030 AS |
82 | static int acpi_button_info_open_fs(struct inode *inode, struct file *file); |
83 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file); | |
1da177e4 LT |
84 | |
85 | static struct acpi_driver acpi_button_driver = { | |
c2b6705b | 86 | .name = "button", |
4be44fcd | 87 | .class = ACPI_BUTTON_CLASS, |
1ba90e3a | 88 | .ids = button_device_ids, |
4be44fcd LB |
89 | .ops = { |
90 | .add = acpi_button_add, | |
23de5d9e | 91 | .resume = acpi_button_resume, |
4be44fcd | 92 | .remove = acpi_button_remove, |
373cfc36 | 93 | .notify = acpi_button_notify, |
c0968f0e | 94 | }, |
1da177e4 LT |
95 | }; |
96 | ||
97 | struct acpi_button { | |
4be44fcd | 98 | struct acpi_device *device; /* Fixed button kludge */ |
c0968f0e DT |
99 | unsigned int type; |
100 | struct input_dev *input; | |
101 | char phys[32]; /* for input device */ | |
4be44fcd | 102 | unsigned long pushed; |
1da177e4 LT |
103 | }; |
104 | ||
d7508032 | 105 | static const struct file_operations acpi_button_info_fops = { |
cf7acfab | 106 | .owner = THIS_MODULE, |
4be44fcd LB |
107 | .open = acpi_button_info_open_fs, |
108 | .read = seq_read, | |
109 | .llseek = seq_lseek, | |
110 | .release = single_release, | |
b34a8030 AS |
111 | }; |
112 | ||
d7508032 | 113 | static const struct file_operations acpi_button_state_fops = { |
cf7acfab | 114 | .owner = THIS_MODULE, |
4be44fcd LB |
115 | .open = acpi_button_state_open_fs, |
116 | .read = seq_read, | |
117 | .llseek = seq_lseek, | |
118 | .release = single_release, | |
b34a8030 | 119 | }; |
4be44fcd | 120 | |
b34a8030 AS |
121 | /* -------------------------------------------------------------------------- |
122 | FS Interface (/proc) | |
123 | -------------------------------------------------------------------------- */ | |
124 | ||
4be44fcd | 125 | static struct proc_dir_entry *acpi_button_dir; |
b34a8030 AS |
126 | |
127 | static int acpi_button_info_seq_show(struct seq_file *seq, void *offset) | |
128 | { | |
c0968f0e | 129 | struct acpi_button *button = seq->private; |
b34a8030 AS |
130 | |
131 | if (!button || !button->device) | |
d550d98d | 132 | return 0; |
b34a8030 | 133 | |
4be44fcd LB |
134 | seq_printf(seq, "type: %s\n", |
135 | acpi_device_name(button->device)); | |
d550d98d | 136 | return 0; |
b34a8030 AS |
137 | } |
138 | ||
139 | static 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 | } | |
4be44fcd | 143 | |
b34a8030 AS |
144 | static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) |
145 | { | |
c0968f0e | 146 | struct acpi_button *button = seq->private; |
4be44fcd | 147 | acpi_status status; |
27663c58 | 148 | unsigned long long state; |
b34a8030 | 149 | |
b34a8030 | 150 | if (!button || !button->device) |
d550d98d | 151 | return 0; |
b34a8030 | 152 | |
27b1d3e8 | 153 | status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, &state); |
c0968f0e DT |
154 | seq_printf(seq, "state: %s\n", |
155 | ACPI_FAILURE(status) ? "unsupported" : | |
156 | (state ? "open" : "closed")); | |
d550d98d | 157 | return 0; |
b34a8030 AS |
158 | } |
159 | ||
160 | static 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 | ||
165 | static struct proc_dir_entry *acpi_power_dir; | |
166 | static struct proc_dir_entry *acpi_sleep_dir; | |
167 | static struct proc_dir_entry *acpi_lid_dir; | |
168 | ||
4be44fcd | 169 | static int acpi_button_add_fs(struct acpi_device *device) |
b34a8030 | 170 | { |
4be44fcd | 171 | struct proc_dir_entry *entry = NULL; |
c0968f0e | 172 | struct acpi_button *button; |
b34a8030 AS |
173 | |
174 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 175 | return -EINVAL; |
b34a8030 AS |
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) | |
4be44fcd LB |
183 | acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER, |
184 | acpi_button_dir); | |
b34a8030 AS |
185 | entry = acpi_power_dir; |
186 | break; | |
187 | case ACPI_BUTTON_TYPE_SLEEP: | |
188 | case ACPI_BUTTON_TYPE_SLEEPF: | |
189 | if (!acpi_sleep_dir) | |
4be44fcd LB |
190 | acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP, |
191 | acpi_button_dir); | |
b34a8030 AS |
192 | entry = acpi_sleep_dir; |
193 | break; | |
194 | case ACPI_BUTTON_TYPE_LID: | |
195 | if (!acpi_lid_dir) | |
4be44fcd LB |
196 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, |
197 | acpi_button_dir); | |
b34a8030 AS |
198 | entry = acpi_lid_dir; |
199 | break; | |
200 | } | |
201 | ||
202 | if (!entry) | |
d550d98d | 203 | return -ENODEV; |
b34a8030 AS |
204 | |
205 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry); | |
206 | if (!acpi_device_dir(device)) | |
d550d98d | 207 | return -ENODEV; |
b34a8030 AS |
208 | |
209 | /* 'info' [R] */ | |
cf7acfab DL |
210 | entry = proc_create_data(ACPI_BUTTON_FILE_INFO, |
211 | S_IRUGO, acpi_device_dir(device), | |
212 | &acpi_button_info_fops, | |
213 | acpi_driver_data(device)); | |
b34a8030 | 214 | if (!entry) |
d550d98d | 215 | return -ENODEV; |
b34a8030 AS |
216 | |
217 | /* show lid state [R] */ | |
218 | if (button->type == ACPI_BUTTON_TYPE_LID) { | |
cf7acfab DL |
219 | entry = proc_create_data(ACPI_BUTTON_FILE_STATE, |
220 | S_IRUGO, acpi_device_dir(device), | |
221 | &acpi_button_state_fops, | |
222 | acpi_driver_data(device)); | |
b34a8030 | 223 | if (!entry) |
a6fc6720 | 224 | return -ENODEV; |
b34a8030 AS |
225 | } |
226 | ||
d550d98d | 227 | return 0; |
b34a8030 AS |
228 | } |
229 | ||
4be44fcd | 230 | static int acpi_button_remove_fs(struct acpi_device *device) |
b34a8030 | 231 | { |
c0968f0e | 232 | struct acpi_button *button = acpi_driver_data(device); |
b34a8030 | 233 | |
b34a8030 AS |
234 | if (acpi_device_dir(device)) { |
235 | if (button->type == ACPI_BUTTON_TYPE_LID) | |
236 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, | |
4be44fcd | 237 | acpi_device_dir(device)); |
b34a8030 | 238 | remove_proc_entry(ACPI_BUTTON_FILE_INFO, |
4be44fcd | 239 | acpi_device_dir(device)); |
b34a8030 AS |
240 | |
241 | remove_proc_entry(acpi_device_bid(device), | |
4be44fcd | 242 | acpi_device_dir(device)->parent); |
b34a8030 AS |
243 | acpi_device_dir(device) = NULL; |
244 | } | |
245 | ||
d550d98d | 246 | return 0; |
b34a8030 AS |
247 | } |
248 | ||
1da177e4 LT |
249 | /* -------------------------------------------------------------------------- |
250 | Driver Interface | |
251 | -------------------------------------------------------------------------- */ | |
23de5d9e AS |
252 | static int acpi_lid_send_state(struct acpi_button *button) |
253 | { | |
27663c58 | 254 | unsigned long long state; |
23de5d9e AS |
255 | acpi_status status; |
256 | ||
257 | status = acpi_evaluate_integer(button->device->handle, "_LID", NULL, | |
258 | &state); | |
259 | if (ACPI_FAILURE(status)) | |
260 | return -ENODEV; | |
50a4da89 | 261 | |
23de5d9e AS |
262 | /* input layer checks if event is redundant */ |
263 | input_report_switch(button->input, SW_LID, !state); | |
df316e93 | 264 | input_sync(button->input); |
23de5d9e AS |
265 | return 0; |
266 | } | |
1da177e4 | 267 | |
373cfc36 | 268 | static void acpi_button_notify(struct acpi_device *device, u32 event) |
1da177e4 | 269 | { |
373cfc36 | 270 | struct acpi_button *button = acpi_driver_data(device); |
c0968f0e | 271 | struct input_dev *input; |
1da177e4 LT |
272 | |
273 | if (!button || !button->device) | |
d550d98d | 274 | return; |
1da177e4 LT |
275 | |
276 | switch (event) { | |
373cfc36 BH |
277 | case ACPI_FIXED_HARDWARE_EVENT: |
278 | event = ACPI_BUTTON_NOTIFY_STATUS; | |
279 | /* fall through */ | |
1da177e4 | 280 | case ACPI_BUTTON_NOTIFY_STATUS: |
c0968f0e | 281 | input = button->input; |
c0968f0e | 282 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
23de5d9e | 283 | acpi_lid_send_state(button); |
c0968f0e DT |
284 | } else { |
285 | int keycode = test_bit(KEY_SLEEP, input->keybit) ? | |
286 | KEY_SLEEP : KEY_POWER; | |
287 | ||
288 | input_report_key(input, keycode, 1); | |
289 | input_sync(input); | |
290 | input_report_key(input, keycode, 0); | |
df316e93 | 291 | input_sync(input); |
c0968f0e | 292 | } |
c0968f0e | 293 | |
14e04fb3 | 294 | acpi_bus_generate_proc_event(button->device, event, |
4be44fcd | 295 | ++button->pushed); |
1da177e4 LT |
296 | break; |
297 | default: | |
298 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 299 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
300 | break; |
301 | } | |
1da177e4 LT |
302 | } |
303 | ||
23de5d9e AS |
304 | static int acpi_button_resume(struct acpi_device *device) |
305 | { | |
306 | struct acpi_button *button; | |
50a4da89 | 307 | |
23de5d9e AS |
308 | if (!device) |
309 | return -EINVAL; | |
310 | button = acpi_driver_data(device); | |
311 | if (button && button->type == ACPI_BUTTON_TYPE_LID) | |
312 | return acpi_lid_send_state(button); | |
313 | return 0; | |
314 | } | |
315 | ||
c0968f0e DT |
316 | static int acpi_button_add(struct acpi_device *device) |
317 | { | |
318 | int error; | |
319 | struct acpi_button *button; | |
320 | struct input_dev *input; | |
1da177e4 LT |
321 | |
322 | if (!device) | |
d550d98d | 323 | return -EINVAL; |
1da177e4 | 324 | |
c0968f0e | 325 | button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); |
1da177e4 | 326 | if (!button) |
d550d98d | 327 | return -ENOMEM; |
1da177e4 LT |
328 | |
329 | button->device = device; | |
db89b4f0 | 330 | device->driver_data = button; |
1da177e4 | 331 | |
c0968f0e DT |
332 | button->input = input = input_allocate_device(); |
333 | if (!input) { | |
334 | error = -ENOMEM; | |
335 | goto err_free_button; | |
336 | } | |
337 | ||
1da177e4 LT |
338 | /* |
339 | * Determine the button type (via hid), as fixed-feature buttons | |
340 | * need to be handled a bit differently than generic-space. | |
341 | */ | |
342 | if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWER)) { | |
343 | button->type = ACPI_BUTTON_TYPE_POWER; | |
4be44fcd LB |
344 | strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_POWER); |
345 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 346 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
4be44fcd | 347 | } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF)) { |
1da177e4 LT |
348 | button->type = ACPI_BUTTON_TYPE_POWERF; |
349 | strcpy(acpi_device_name(device), | |
4be44fcd LB |
350 | ACPI_BUTTON_DEVICE_NAME_POWERF); |
351 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 352 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
4be44fcd | 353 | } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEP)) { |
1da177e4 | 354 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
4be44fcd LB |
355 | strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_SLEEP); |
356 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 357 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
4be44fcd | 358 | } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF)) { |
1da177e4 LT |
359 | button->type = ACPI_BUTTON_TYPE_SLEEPF; |
360 | strcpy(acpi_device_name(device), | |
4be44fcd LB |
361 | ACPI_BUTTON_DEVICE_NAME_SLEEPF); |
362 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 363 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
4be44fcd | 364 | } else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_LID)) { |
1da177e4 | 365 | button->type = ACPI_BUTTON_TYPE_LID; |
4be44fcd LB |
366 | strcpy(acpi_device_name(device), ACPI_BUTTON_DEVICE_NAME_LID); |
367 | sprintf(acpi_device_class(device), "%s/%s", | |
1da177e4 | 368 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
4be44fcd | 369 | } else { |
6468463a LB |
370 | printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", |
371 | acpi_device_hid(device)); | |
c0968f0e DT |
372 | error = -ENODEV; |
373 | goto err_free_input; | |
1da177e4 LT |
374 | } |
375 | ||
c0968f0e DT |
376 | error = acpi_button_add_fs(device); |
377 | if (error) | |
378 | goto err_free_input; | |
379 | ||
c0968f0e DT |
380 | snprintf(button->phys, sizeof(button->phys), |
381 | "%s/button/input0", acpi_device_hid(device)); | |
382 | ||
383 | input->name = acpi_device_name(device); | |
384 | input->phys = button->phys; | |
385 | input->id.bustype = BUS_HOST; | |
386 | input->id.product = button->type; | |
3b34e523 | 387 | input->dev.parent = &device->dev; |
b34a8030 | 388 | |
1da177e4 | 389 | switch (button->type) { |
c0968f0e | 390 | case ACPI_BUTTON_TYPE_POWER: |
1da177e4 | 391 | case ACPI_BUTTON_TYPE_POWERF: |
7b19ada2 | 392 | input->evbit[0] = BIT_MASK(EV_KEY); |
c0968f0e | 393 | set_bit(KEY_POWER, input->keybit); |
1da177e4 | 394 | break; |
c0968f0e DT |
395 | |
396 | case ACPI_BUTTON_TYPE_SLEEP: | |
1da177e4 | 397 | case ACPI_BUTTON_TYPE_SLEEPF: |
7b19ada2 | 398 | input->evbit[0] = BIT_MASK(EV_KEY); |
c0968f0e | 399 | set_bit(KEY_SLEEP, input->keybit); |
1da177e4 | 400 | break; |
c0968f0e DT |
401 | |
402 | case ACPI_BUTTON_TYPE_LID: | |
7b19ada2 | 403 | input->evbit[0] = BIT_MASK(EV_SW); |
c0968f0e | 404 | set_bit(SW_LID, input->swbit); |
1da177e4 LT |
405 | break; |
406 | } | |
407 | ||
c0968f0e DT |
408 | error = input_register_device(input); |
409 | if (error) | |
373cfc36 | 410 | goto err_remove_fs; |
23de5d9e AS |
411 | if (button->type == ACPI_BUTTON_TYPE_LID) |
412 | acpi_lid_send_state(button); | |
1da177e4 LT |
413 | |
414 | if (device->wakeup.flags.valid) { | |
415 | /* Button's GPE is run-wake GPE */ | |
4be44fcd LB |
416 | acpi_set_gpe_type(device->wakeup.gpe_device, |
417 | device->wakeup.gpe_number, | |
418 | ACPI_GPE_TYPE_WAKE_RUN); | |
419 | acpi_enable_gpe(device->wakeup.gpe_device, | |
0b7084ac | 420 | device->wakeup.gpe_number); |
1da177e4 LT |
421 | device->wakeup.state.enabled = 1; |
422 | } | |
423 | ||
4be44fcd LB |
424 | printk(KERN_INFO PREFIX "%s [%s]\n", |
425 | acpi_device_name(device), acpi_device_bid(device)); | |
c0968f0e | 426 | return 0; |
1da177e4 | 427 | |
c0968f0e DT |
428 | err_remove_fs: |
429 | acpi_button_remove_fs(device); | |
430 | err_free_input: | |
431 | input_free_device(input); | |
432 | err_free_button: | |
433 | kfree(button); | |
434 | return error; | |
1da177e4 LT |
435 | } |
436 | ||
4be44fcd | 437 | static int acpi_button_remove(struct acpi_device *device, int type) |
1da177e4 | 438 | { |
c0968f0e | 439 | struct acpi_button *button; |
1da177e4 LT |
440 | |
441 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 442 | return -EINVAL; |
1da177e4 LT |
443 | |
444 | button = acpi_driver_data(device); | |
445 | ||
4be44fcd | 446 | acpi_button_remove_fs(device); |
c0968f0e | 447 | input_unregister_device(button->input); |
1da177e4 | 448 | kfree(button); |
d550d98d | 449 | return 0; |
1da177e4 LT |
450 | } |
451 | ||
4be44fcd | 452 | static int __init acpi_button_init(void) |
1da177e4 | 453 | { |
c0968f0e | 454 | int result; |
1da177e4 | 455 | |
b34a8030 AS |
456 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); |
457 | if (!acpi_button_dir) | |
d550d98d | 458 | return -ENODEV; |
50a4da89 | 459 | |
1da177e4 LT |
460 | result = acpi_bus_register_driver(&acpi_button_driver); |
461 | if (result < 0) { | |
b34a8030 | 462 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
d550d98d | 463 | return -ENODEV; |
1da177e4 LT |
464 | } |
465 | ||
d550d98d | 466 | return 0; |
1da177e4 LT |
467 | } |
468 | ||
4be44fcd | 469 | static void __exit acpi_button_exit(void) |
1da177e4 | 470 | { |
1da177e4 LT |
471 | acpi_bus_unregister_driver(&acpi_button_driver); |
472 | ||
4be44fcd | 473 | if (acpi_power_dir) |
b34a8030 AS |
474 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir); |
475 | if (acpi_sleep_dir) | |
476 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir); | |
477 | if (acpi_lid_dir) | |
478 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
479 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
1da177e4 LT |
480 | } |
481 | ||
1da177e4 LT |
482 | module_init(acpi_button_init); |
483 | module_exit(acpi_button_exit); |