Commit | Line | Data |
---|---|---|
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 | * | |
1da177e4 LT |
19 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/init.h> | |
b34a8030 AS |
25 | #include <linux/types.h> |
26 | #include <linux/proc_fs.h> | |
27 | #include <linux/seq_file.h> | |
c0968f0e | 28 | #include <linux/input.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
8b48463f | 30 | #include <linux/acpi.h> |
6270da6f | 31 | #include <acpi/button.h> |
1da177e4 | 32 | |
a192a958 LB |
33 | #define PREFIX "ACPI: " |
34 | ||
1da177e4 | 35 | #define ACPI_BUTTON_CLASS "button" |
b34a8030 AS |
36 | #define ACPI_BUTTON_FILE_INFO "info" |
37 | #define ACPI_BUTTON_FILE_STATE "state" | |
38 | #define ACPI_BUTTON_TYPE_UNKNOWN 0x00 | |
1da177e4 LT |
39 | #define ACPI_BUTTON_NOTIFY_STATUS 0x80 |
40 | ||
41 | #define ACPI_BUTTON_SUBCLASS_POWER "power" | |
4be44fcd | 42 | #define ACPI_BUTTON_HID_POWER "PNP0C0C" |
d68b597c | 43 | #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button" |
1da177e4 | 44 | #define ACPI_BUTTON_TYPE_POWER 0x01 |
1da177e4 LT |
45 | |
46 | #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" | |
47 | #define ACPI_BUTTON_HID_SLEEP "PNP0C0E" | |
d68b597c | 48 | #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button" |
1da177e4 | 49 | #define ACPI_BUTTON_TYPE_SLEEP 0x03 |
1da177e4 LT |
50 | |
51 | #define ACPI_BUTTON_SUBCLASS_LID "lid" | |
52 | #define ACPI_BUTTON_HID_LID "PNP0C0D" | |
53 | #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" | |
54 | #define ACPI_BUTTON_TYPE_LID 0x05 | |
55 | ||
3540c32a LZ |
56 | #define ACPI_BUTTON_LID_INIT_IGNORE 0x00 |
57 | #define ACPI_BUTTON_LID_INIT_OPEN 0x01 | |
58 | #define ACPI_BUTTON_LID_INIT_METHOD 0x02 | |
59 | ||
1da177e4 | 60 | #define _COMPONENT ACPI_BUTTON_COMPONENT |
f52fd66d | 61 | ACPI_MODULE_NAME("button"); |
1da177e4 | 62 | |
c0968f0e | 63 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 64 | MODULE_DESCRIPTION("ACPI Button Driver"); |
1da177e4 LT |
65 | MODULE_LICENSE("GPL"); |
66 | ||
1ba90e3a TR |
67 | static const struct acpi_device_id button_device_ids[] = { |
68 | {ACPI_BUTTON_HID_LID, 0}, | |
69 | {ACPI_BUTTON_HID_SLEEP, 0}, | |
70 | {ACPI_BUTTON_HID_SLEEPF, 0}, | |
71 | {ACPI_BUTTON_HID_POWER, 0}, | |
72 | {ACPI_BUTTON_HID_POWERF, 0}, | |
73 | {"", 0}, | |
74 | }; | |
75 | MODULE_DEVICE_TABLE(acpi, button_device_ids); | |
76 | ||
4be44fcd | 77 | static int acpi_button_add(struct acpi_device *device); |
51fac838 | 78 | static int acpi_button_remove(struct acpi_device *device); |
373cfc36 | 79 | static void acpi_button_notify(struct acpi_device *device, u32 event); |
1da177e4 | 80 | |
90692404 | 81 | #ifdef CONFIG_PM_SLEEP |
e71eeb2a | 82 | static int acpi_button_suspend(struct device *dev); |
1be532de | 83 | static int acpi_button_resume(struct device *dev); |
2de9fd17 | 84 | #else |
e71eeb2a | 85 | #define acpi_button_suspend NULL |
2de9fd17 | 86 | #define acpi_button_resume NULL |
90692404 | 87 | #endif |
e71eeb2a | 88 | static SIMPLE_DEV_PM_OPS(acpi_button_pm, acpi_button_suspend, acpi_button_resume); |
1be532de | 89 | |
1da177e4 | 90 | static struct acpi_driver acpi_button_driver = { |
c2b6705b | 91 | .name = "button", |
4be44fcd | 92 | .class = ACPI_BUTTON_CLASS, |
1ba90e3a | 93 | .ids = button_device_ids, |
4be44fcd LB |
94 | .ops = { |
95 | .add = acpi_button_add, | |
96 | .remove = acpi_button_remove, | |
373cfc36 | 97 | .notify = acpi_button_notify, |
c0968f0e | 98 | }, |
1be532de | 99 | .drv.pm = &acpi_button_pm, |
1da177e4 LT |
100 | }; |
101 | ||
102 | struct acpi_button { | |
c0968f0e DT |
103 | unsigned int type; |
104 | struct input_dev *input; | |
105 | char phys[32]; /* for input device */ | |
4be44fcd | 106 | unsigned long pushed; |
e71eeb2a | 107 | bool suspended; |
1da177e4 LT |
108 | }; |
109 | ||
7e12715e JB |
110 | static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier); |
111 | static struct acpi_device *lid_device; | |
3540c32a | 112 | static u8 lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; |
7e12715e | 113 | |
b34a8030 AS |
114 | /* -------------------------------------------------------------------------- |
115 | FS Interface (/proc) | |
116 | -------------------------------------------------------------------------- */ | |
117 | ||
4be44fcd | 118 | static struct proc_dir_entry *acpi_button_dir; |
912b7427 | 119 | static struct proc_dir_entry *acpi_lid_dir; |
4be44fcd | 120 | |
ee7e2265 LZ |
121 | static int acpi_lid_evaluate_state(struct acpi_device *device) |
122 | { | |
123 | unsigned long long lid_state; | |
124 | acpi_status status; | |
125 | ||
126 | status = acpi_evaluate_integer(device->handle, "_LID", NULL, &lid_state); | |
127 | if (ACPI_FAILURE(status)) | |
128 | return -ENODEV; | |
129 | ||
130 | return lid_state ? 1 : 0; | |
131 | } | |
132 | ||
133 | static int acpi_lid_notify_state(struct acpi_device *device, int state) | |
134 | { | |
135 | struct acpi_button *button = acpi_driver_data(device); | |
136 | int ret; | |
137 | ||
138 | /* input layer checks if event is redundant */ | |
139 | input_report_switch(button->input, SW_LID, !state); | |
140 | input_sync(button->input); | |
141 | ||
142 | if (state) | |
143 | pm_wakeup_event(&device->dev, 0); | |
144 | ||
145 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device); | |
146 | if (ret == NOTIFY_DONE) | |
147 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, | |
148 | device); | |
149 | if (ret == NOTIFY_DONE || ret == NOTIFY_OK) { | |
150 | /* | |
151 | * It is also regarded as success if the notifier_chain | |
152 | * returns NOTIFY_OK or NOTIFY_DONE. | |
153 | */ | |
154 | ret = 0; | |
155 | } | |
156 | return ret; | |
157 | } | |
158 | ||
b34a8030 AS |
159 | static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) |
160 | { | |
106c19e7 | 161 | struct acpi_device *device = seq->private; |
ee7e2265 | 162 | int state; |
b34a8030 | 163 | |
ee7e2265 | 164 | state = acpi_lid_evaluate_state(device); |
c0968f0e | 165 | seq_printf(seq, "state: %s\n", |
ee7e2265 | 166 | state < 0 ? "unsupported" : (state ? "open" : "closed")); |
d550d98d | 167 | return 0; |
b34a8030 AS |
168 | } |
169 | ||
170 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file) | |
171 | { | |
d9dda78b | 172 | return single_open(file, acpi_button_state_seq_show, PDE_DATA(inode)); |
b34a8030 AS |
173 | } |
174 | ||
912b7427 ZR |
175 | static const struct file_operations acpi_button_state_fops = { |
176 | .owner = THIS_MODULE, | |
177 | .open = acpi_button_state_open_fs, | |
178 | .read = seq_read, | |
179 | .llseek = seq_lseek, | |
180 | .release = single_release, | |
181 | }; | |
b34a8030 | 182 | |
4be44fcd | 183 | static int acpi_button_add_fs(struct acpi_device *device) |
b34a8030 | 184 | { |
1bce8113 | 185 | struct acpi_button *button = acpi_driver_data(device); |
4be44fcd | 186 | struct proc_dir_entry *entry = NULL; |
912b7427 | 187 | int ret = 0; |
b34a8030 | 188 | |
912b7427 ZR |
189 | /* procfs I/F for ACPI lid device only */ |
190 | if (button->type != ACPI_BUTTON_TYPE_LID) | |
191 | return 0; | |
192 | ||
193 | if (acpi_button_dir || acpi_lid_dir) { | |
194 | printk(KERN_ERR PREFIX "More than one Lid device found!\n"); | |
195 | return -EEXIST; | |
b34a8030 AS |
196 | } |
197 | ||
912b7427 ZR |
198 | /* create /proc/acpi/button */ |
199 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); | |
200 | if (!acpi_button_dir) | |
d550d98d | 201 | return -ENODEV; |
b34a8030 | 202 | |
912b7427 ZR |
203 | /* create /proc/acpi/button/lid */ |
204 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
205 | if (!acpi_lid_dir) { | |
206 | ret = -ENODEV; | |
207 | goto remove_button_dir; | |
208 | } | |
b34a8030 | 209 | |
912b7427 ZR |
210 | /* create /proc/acpi/button/lid/LID/ */ |
211 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir); | |
212 | if (!acpi_device_dir(device)) { | |
213 | ret = -ENODEV; | |
214 | goto remove_lid_dir; | |
215 | } | |
b34a8030 | 216 | |
912b7427 ZR |
217 | /* create /proc/acpi/button/lid/LID/state */ |
218 | entry = proc_create_data(ACPI_BUTTON_FILE_STATE, | |
219 | S_IRUGO, acpi_device_dir(device), | |
220 | &acpi_button_state_fops, device); | |
221 | if (!entry) { | |
222 | ret = -ENODEV; | |
223 | goto remove_dev_dir; | |
b34a8030 AS |
224 | } |
225 | ||
912b7427 ZR |
226 | done: |
227 | return ret; | |
228 | ||
229 | remove_dev_dir: | |
230 | remove_proc_entry(acpi_device_bid(device), | |
231 | acpi_lid_dir); | |
232 | acpi_device_dir(device) = NULL; | |
233 | remove_lid_dir: | |
234 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
e370cc86 | 235 | acpi_lid_dir = NULL; |
912b7427 ZR |
236 | remove_button_dir: |
237 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
e370cc86 | 238 | acpi_button_dir = NULL; |
912b7427 | 239 | goto done; |
b34a8030 AS |
240 | } |
241 | ||
4be44fcd | 242 | static int acpi_button_remove_fs(struct acpi_device *device) |
b34a8030 | 243 | { |
c0968f0e | 244 | struct acpi_button *button = acpi_driver_data(device); |
b34a8030 | 245 | |
912b7427 ZR |
246 | if (button->type != ACPI_BUTTON_TYPE_LID) |
247 | return 0; | |
b34a8030 | 248 | |
912b7427 ZR |
249 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, |
250 | acpi_device_dir(device)); | |
251 | remove_proc_entry(acpi_device_bid(device), | |
252 | acpi_lid_dir); | |
253 | acpi_device_dir(device) = NULL; | |
254 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
e370cc86 | 255 | acpi_lid_dir = NULL; |
912b7427 | 256 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
e370cc86 | 257 | acpi_button_dir = NULL; |
b34a8030 | 258 | |
d550d98d | 259 | return 0; |
b34a8030 AS |
260 | } |
261 | ||
1da177e4 LT |
262 | /* -------------------------------------------------------------------------- |
263 | Driver Interface | |
264 | -------------------------------------------------------------------------- */ | |
7e12715e JB |
265 | int acpi_lid_notifier_register(struct notifier_block *nb) |
266 | { | |
267 | return blocking_notifier_chain_register(&acpi_lid_notifier, nb); | |
268 | } | |
269 | EXPORT_SYMBOL(acpi_lid_notifier_register); | |
270 | ||
271 | int acpi_lid_notifier_unregister(struct notifier_block *nb) | |
272 | { | |
273 | return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb); | |
274 | } | |
275 | EXPORT_SYMBOL(acpi_lid_notifier_unregister); | |
276 | ||
277 | int acpi_lid_open(void) | |
278 | { | |
2c907b72 JB |
279 | if (!lid_device) |
280 | return -ENODEV; | |
281 | ||
ee7e2265 | 282 | return acpi_lid_evaluate_state(lid_device); |
7e12715e JB |
283 | } |
284 | EXPORT_SYMBOL(acpi_lid_open); | |
285 | ||
ee7e2265 | 286 | static int acpi_lid_update_state(struct acpi_device *device) |
23de5d9e | 287 | { |
ee7e2265 | 288 | int state; |
50a4da89 | 289 | |
ee7e2265 LZ |
290 | state = acpi_lid_evaluate_state(device); |
291 | if (state < 0) | |
292 | return state; | |
7e12715e | 293 | |
ee7e2265 | 294 | return acpi_lid_notify_state(device, state); |
23de5d9e | 295 | } |
1da177e4 | 296 | |
3540c32a LZ |
297 | static void acpi_lid_initialize_state(struct acpi_device *device) |
298 | { | |
299 | switch (lid_init_state) { | |
300 | case ACPI_BUTTON_LID_INIT_OPEN: | |
301 | (void)acpi_lid_notify_state(device, 1); | |
302 | break; | |
303 | case ACPI_BUTTON_LID_INIT_METHOD: | |
304 | (void)acpi_lid_update_state(device); | |
305 | break; | |
306 | case ACPI_BUTTON_LID_INIT_IGNORE: | |
307 | default: | |
308 | break; | |
309 | } | |
310 | } | |
311 | ||
373cfc36 | 312 | static void acpi_button_notify(struct acpi_device *device, u32 event) |
1da177e4 | 313 | { |
373cfc36 | 314 | struct acpi_button *button = acpi_driver_data(device); |
c0968f0e | 315 | struct input_dev *input; |
1da177e4 | 316 | |
1da177e4 | 317 | switch (event) { |
373cfc36 BH |
318 | case ACPI_FIXED_HARDWARE_EVENT: |
319 | event = ACPI_BUTTON_NOTIFY_STATUS; | |
320 | /* fall through */ | |
1da177e4 | 321 | case ACPI_BUTTON_NOTIFY_STATUS: |
c0968f0e | 322 | input = button->input; |
c0968f0e | 323 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
ee7e2265 | 324 | acpi_lid_update_state(device); |
c0968f0e | 325 | } else { |
e71eeb2a RW |
326 | int keycode; |
327 | ||
328 | pm_wakeup_event(&device->dev, 0); | |
329 | if (button->suspended) | |
330 | break; | |
c0968f0e | 331 | |
e71eeb2a RW |
332 | keycode = test_bit(KEY_SLEEP, input->keybit) ? |
333 | KEY_SLEEP : KEY_POWER; | |
c0968f0e DT |
334 | input_report_key(input, keycode, 1); |
335 | input_sync(input); | |
336 | input_report_key(input, keycode, 0); | |
df316e93 | 337 | input_sync(input); |
1f83511b | 338 | |
0bf6368e LT |
339 | acpi_bus_generate_netlink_event( |
340 | device->pnp.device_class, | |
341 | dev_name(&device->dev), | |
342 | event, ++button->pushed); | |
c0968f0e | 343 | } |
1da177e4 LT |
344 | break; |
345 | default: | |
346 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 347 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
348 | break; |
349 | } | |
1da177e4 LT |
350 | } |
351 | ||
90692404 | 352 | #ifdef CONFIG_PM_SLEEP |
e71eeb2a RW |
353 | static int acpi_button_suspend(struct device *dev) |
354 | { | |
355 | struct acpi_device *device = to_acpi_device(dev); | |
356 | struct acpi_button *button = acpi_driver_data(device); | |
357 | ||
358 | button->suspended = true; | |
359 | return 0; | |
360 | } | |
361 | ||
1be532de | 362 | static int acpi_button_resume(struct device *dev) |
23de5d9e | 363 | { |
1be532de | 364 | struct acpi_device *device = to_acpi_device(dev); |
1bce8113 | 365 | struct acpi_button *button = acpi_driver_data(device); |
50a4da89 | 366 | |
e71eeb2a | 367 | button->suspended = false; |
3540c32a LZ |
368 | if (button->type == ACPI_BUTTON_TYPE_LID) |
369 | acpi_lid_initialize_state(device); | |
23de5d9e AS |
370 | return 0; |
371 | } | |
90692404 | 372 | #endif |
23de5d9e | 373 | |
c0968f0e DT |
374 | static int acpi_button_add(struct acpi_device *device) |
375 | { | |
c0968f0e DT |
376 | struct acpi_button *button; |
377 | struct input_dev *input; | |
620e112c TR |
378 | const char *hid = acpi_device_hid(device); |
379 | char *name, *class; | |
1bce8113 | 380 | int error; |
1da177e4 | 381 | |
c0968f0e | 382 | button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); |
1da177e4 | 383 | if (!button) |
d550d98d | 384 | return -ENOMEM; |
1da177e4 | 385 | |
db89b4f0 | 386 | device->driver_data = button; |
1da177e4 | 387 | |
c0968f0e DT |
388 | button->input = input = input_allocate_device(); |
389 | if (!input) { | |
390 | error = -ENOMEM; | |
391 | goto err_free_button; | |
392 | } | |
393 | ||
bf04a772 BH |
394 | name = acpi_device_name(device); |
395 | class = acpi_device_class(device); | |
396 | ||
d68b597c BH |
397 | if (!strcmp(hid, ACPI_BUTTON_HID_POWER) || |
398 | !strcmp(hid, ACPI_BUTTON_HID_POWERF)) { | |
1da177e4 | 399 | button->type = ACPI_BUTTON_TYPE_POWER; |
bf04a772 BH |
400 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); |
401 | sprintf(class, "%s/%s", | |
1da177e4 | 402 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
d68b597c BH |
403 | } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) || |
404 | !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { | |
1da177e4 | 405 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
bf04a772 BH |
406 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); |
407 | sprintf(class, "%s/%s", | |
1da177e4 | 408 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
bf04a772 | 409 | } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { |
1da177e4 | 410 | button->type = ACPI_BUTTON_TYPE_LID; |
bf04a772 BH |
411 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); |
412 | sprintf(class, "%s/%s", | |
1da177e4 | 413 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
4be44fcd | 414 | } else { |
bf04a772 | 415 | printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid); |
c0968f0e DT |
416 | error = -ENODEV; |
417 | goto err_free_input; | |
1da177e4 LT |
418 | } |
419 | ||
c0968f0e DT |
420 | error = acpi_button_add_fs(device); |
421 | if (error) | |
422 | goto err_free_input; | |
423 | ||
bf04a772 | 424 | snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); |
c0968f0e | 425 | |
bf04a772 | 426 | input->name = name; |
c0968f0e DT |
427 | input->phys = button->phys; |
428 | input->id.bustype = BUS_HOST; | |
429 | input->id.product = button->type; | |
3b34e523 | 430 | input->dev.parent = &device->dev; |
b34a8030 | 431 | |
1da177e4 | 432 | switch (button->type) { |
c0968f0e | 433 | case ACPI_BUTTON_TYPE_POWER: |
763f527b | 434 | input_set_capability(input, EV_KEY, KEY_POWER); |
1da177e4 | 435 | break; |
c0968f0e DT |
436 | |
437 | case ACPI_BUTTON_TYPE_SLEEP: | |
763f527b | 438 | input_set_capability(input, EV_KEY, KEY_SLEEP); |
1da177e4 | 439 | break; |
c0968f0e DT |
440 | |
441 | case ACPI_BUTTON_TYPE_LID: | |
763f527b | 442 | input_set_capability(input, EV_SW, SW_LID); |
1da177e4 LT |
443 | break; |
444 | } | |
445 | ||
c0968f0e DT |
446 | error = input_register_device(input); |
447 | if (error) | |
373cfc36 | 448 | goto err_remove_fs; |
7e12715e | 449 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
3540c32a | 450 | acpi_lid_initialize_state(device); |
7e12715e JB |
451 | /* |
452 | * This assumes there's only one lid device, or if there are | |
453 | * more we only care about the last one... | |
454 | */ | |
455 | lid_device = device; | |
456 | } | |
1da177e4 | 457 | |
bf04a772 | 458 | printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device)); |
c0968f0e | 459 | return 0; |
1da177e4 | 460 | |
c0968f0e DT |
461 | err_remove_fs: |
462 | acpi_button_remove_fs(device); | |
463 | err_free_input: | |
464 | input_free_device(input); | |
465 | err_free_button: | |
466 | kfree(button); | |
467 | return error; | |
1da177e4 LT |
468 | } |
469 | ||
51fac838 | 470 | static int acpi_button_remove(struct acpi_device *device) |
1da177e4 | 471 | { |
1bce8113 | 472 | struct acpi_button *button = acpi_driver_data(device); |
1da177e4 | 473 | |
4be44fcd | 474 | acpi_button_remove_fs(device); |
c0968f0e | 475 | input_unregister_device(button->input); |
1da177e4 | 476 | kfree(button); |
d550d98d | 477 | return 0; |
1da177e4 LT |
478 | } |
479 | ||
3540c32a LZ |
480 | static int param_set_lid_init_state(const char *val, struct kernel_param *kp) |
481 | { | |
482 | int result = 0; | |
483 | ||
484 | if (!strncmp(val, "open", sizeof("open") - 1)) { | |
485 | lid_init_state = ACPI_BUTTON_LID_INIT_OPEN; | |
486 | pr_info("Notify initial lid state as open\n"); | |
487 | } else if (!strncmp(val, "method", sizeof("method") - 1)) { | |
488 | lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; | |
489 | pr_info("Notify initial lid state with _LID return value\n"); | |
490 | } else if (!strncmp(val, "ignore", sizeof("ignore") - 1)) { | |
491 | lid_init_state = ACPI_BUTTON_LID_INIT_IGNORE; | |
492 | pr_info("Do not notify initial lid state\n"); | |
493 | } else | |
494 | result = -EINVAL; | |
495 | return result; | |
496 | } | |
497 | ||
498 | static int param_get_lid_init_state(char *buffer, struct kernel_param *kp) | |
499 | { | |
500 | switch (lid_init_state) { | |
501 | case ACPI_BUTTON_LID_INIT_OPEN: | |
502 | return sprintf(buffer, "open"); | |
503 | case ACPI_BUTTON_LID_INIT_METHOD: | |
504 | return sprintf(buffer, "method"); | |
505 | case ACPI_BUTTON_LID_INIT_IGNORE: | |
506 | return sprintf(buffer, "ignore"); | |
507 | default: | |
508 | return sprintf(buffer, "invalid"); | |
509 | } | |
510 | return 0; | |
511 | } | |
512 | ||
513 | module_param_call(lid_init_state, | |
514 | param_set_lid_init_state, param_get_lid_init_state, | |
515 | NULL, 0644); | |
516 | MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state"); | |
517 | ||
466e78f7 | 518 | module_acpi_driver(acpi_button_driver); |