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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 | * | |
1da177e4 LT |
19 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
20 | */ | |
21 | ||
b6aeab44 | 22 | #define pr_fmt(fmt) "ACPI: button: " fmt |
dfa46c50 | 23 | |
1da177e4 LT |
24 | #include <linux/kernel.h> |
25 | #include <linux/module.h> | |
26 | #include <linux/init.h> | |
b34a8030 AS |
27 | #include <linux/types.h> |
28 | #include <linux/proc_fs.h> | |
29 | #include <linux/seq_file.h> | |
c0968f0e | 30 | #include <linux/input.h> |
5a0e3ad6 | 31 | #include <linux/slab.h> |
8b48463f | 32 | #include <linux/acpi.h> |
6270da6f | 33 | #include <acpi/button.h> |
1da177e4 | 34 | |
a192a958 LB |
35 | #define PREFIX "ACPI: " |
36 | ||
1da177e4 | 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" |
d68b597c | 45 | #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button" |
1da177e4 | 46 | #define ACPI_BUTTON_TYPE_POWER 0x01 |
1da177e4 LT |
47 | |
48 | #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" | |
49 | #define ACPI_BUTTON_HID_SLEEP "PNP0C0E" | |
d68b597c | 50 | #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button" |
1da177e4 | 51 | #define ACPI_BUTTON_TYPE_SLEEP 0x03 |
1da177e4 LT |
52 | |
53 | #define ACPI_BUTTON_SUBCLASS_LID "lid" | |
54 | #define ACPI_BUTTON_HID_LID "PNP0C0D" | |
55 | #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" | |
56 | #define ACPI_BUTTON_TYPE_LID 0x05 | |
57 | ||
3540c32a LZ |
58 | #define ACPI_BUTTON_LID_INIT_IGNORE 0x00 |
59 | #define ACPI_BUTTON_LID_INIT_OPEN 0x01 | |
f369fdf4 | 60 | #define ACPI_BUTTON_LID_INIT_METHOD 0x02 |
3540c32a | 61 | |
1da177e4 | 62 | #define _COMPONENT ACPI_BUTTON_COMPONENT |
f52fd66d | 63 | ACPI_MODULE_NAME("button"); |
1da177e4 | 64 | |
c0968f0e | 65 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 66 | MODULE_DESCRIPTION("ACPI Button Driver"); |
1da177e4 LT |
67 | MODULE_LICENSE("GPL"); |
68 | ||
1ba90e3a TR |
69 | static 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 | }; | |
77 | MODULE_DEVICE_TABLE(acpi, button_device_ids); | |
78 | ||
4be44fcd | 79 | static int acpi_button_add(struct acpi_device *device); |
51fac838 | 80 | static int acpi_button_remove(struct acpi_device *device); |
373cfc36 | 81 | static void acpi_button_notify(struct acpi_device *device, u32 event); |
1da177e4 | 82 | |
90692404 | 83 | #ifdef CONFIG_PM_SLEEP |
e71eeb2a | 84 | static int acpi_button_suspend(struct device *dev); |
1be532de | 85 | static int acpi_button_resume(struct device *dev); |
2de9fd17 | 86 | #else |
e71eeb2a | 87 | #define acpi_button_suspend NULL |
2de9fd17 | 88 | #define acpi_button_resume NULL |
90692404 | 89 | #endif |
e71eeb2a | 90 | static SIMPLE_DEV_PM_OPS(acpi_button_pm, acpi_button_suspend, acpi_button_resume); |
1be532de | 91 | |
1da177e4 | 92 | static struct acpi_driver acpi_button_driver = { |
c2b6705b | 93 | .name = "button", |
4be44fcd | 94 | .class = ACPI_BUTTON_CLASS, |
1ba90e3a | 95 | .ids = button_device_ids, |
4be44fcd LB |
96 | .ops = { |
97 | .add = acpi_button_add, | |
98 | .remove = acpi_button_remove, | |
373cfc36 | 99 | .notify = acpi_button_notify, |
c0968f0e | 100 | }, |
1be532de | 101 | .drv.pm = &acpi_button_pm, |
1da177e4 LT |
102 | }; |
103 | ||
104 | struct acpi_button { | |
c0968f0e DT |
105 | unsigned int type; |
106 | struct input_dev *input; | |
107 | char phys[32]; /* for input device */ | |
4be44fcd | 108 | unsigned long pushed; |
dfa46c50 LZ |
109 | int last_state; |
110 | ktime_t last_time; | |
e71eeb2a | 111 | bool suspended; |
1da177e4 LT |
112 | }; |
113 | ||
7e12715e JB |
114 | static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier); |
115 | static struct acpi_device *lid_device; | |
878d8db0 | 116 | static u8 lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; |
7e12715e | 117 | |
dfa46c50 LZ |
118 | static unsigned long lid_report_interval __read_mostly = 500; |
119 | module_param(lid_report_interval, ulong, 0644); | |
120 | MODULE_PARM_DESC(lid_report_interval, "Interval (ms) between lid key events"); | |
121 | ||
b34a8030 AS |
122 | /* -------------------------------------------------------------------------- |
123 | FS Interface (/proc) | |
124 | -------------------------------------------------------------------------- */ | |
125 | ||
4be44fcd | 126 | static struct proc_dir_entry *acpi_button_dir; |
912b7427 | 127 | static struct proc_dir_entry *acpi_lid_dir; |
4be44fcd | 128 | |
ee7e2265 LZ |
129 | static int acpi_lid_evaluate_state(struct acpi_device *device) |
130 | { | |
131 | unsigned long long lid_state; | |
132 | acpi_status status; | |
133 | ||
134 | status = acpi_evaluate_integer(device->handle, "_LID", NULL, &lid_state); | |
135 | if (ACPI_FAILURE(status)) | |
136 | return -ENODEV; | |
137 | ||
138 | return lid_state ? 1 : 0; | |
139 | } | |
140 | ||
141 | static int acpi_lid_notify_state(struct acpi_device *device, int state) | |
142 | { | |
143 | struct acpi_button *button = acpi_driver_data(device); | |
144 | int ret; | |
dfa46c50 LZ |
145 | ktime_t next_report; |
146 | bool do_update; | |
147 | ||
148 | /* | |
149 | * In lid_init_state=ignore mode, if user opens/closes lid | |
150 | * frequently with "open" missing, and "last_time" is also updated | |
151 | * frequently, "close" cannot be delivered to the userspace. | |
152 | * So "last_time" is only updated after a timeout or an actual | |
153 | * switch. | |
154 | */ | |
155 | if (lid_init_state != ACPI_BUTTON_LID_INIT_IGNORE || | |
156 | button->last_state != !!state) | |
157 | do_update = true; | |
158 | else | |
159 | do_update = false; | |
160 | ||
161 | next_report = ktime_add(button->last_time, | |
162 | ms_to_ktime(lid_report_interval)); | |
163 | if (button->last_state == !!state && | |
164 | ktime_after(ktime_get(), next_report)) { | |
165 | /* Complain the buggy firmware */ | |
166 | pr_warn_once("The lid device is not compliant to SW_LID.\n"); | |
ee7e2265 | 167 | |
dfa46c50 LZ |
168 | /* |
169 | * Send the unreliable complement switch event: | |
170 | * | |
171 | * On most platforms, the lid device is reliable. However | |
172 | * there are exceptions: | |
173 | * 1. Platforms returning initial lid state as "close" by | |
174 | * default after booting/resuming: | |
175 | * https://bugzilla.kernel.org/show_bug.cgi?id=89211 | |
176 | * https://bugzilla.kernel.org/show_bug.cgi?id=106151 | |
177 | * 2. Platforms never reporting "open" events: | |
178 | * https://bugzilla.kernel.org/show_bug.cgi?id=106941 | |
179 | * On these buggy platforms, the usage model of the ACPI | |
180 | * lid device actually is: | |
181 | * 1. The initial returning value of _LID may not be | |
182 | * reliable. | |
183 | * 2. The open event may not be reliable. | |
184 | * 3. The close event is reliable. | |
185 | * | |
186 | * But SW_LID is typed as input switch event, the input | |
187 | * layer checks if the event is redundant. Hence if the | |
188 | * state is not switched, the userspace cannot see this | |
189 | * platform triggered reliable event. By inserting a | |
190 | * complement switch event, it then is guaranteed that the | |
191 | * platform triggered reliable one can always be seen by | |
192 | * the userspace. | |
193 | */ | |
194 | if (lid_init_state == ACPI_BUTTON_LID_INIT_IGNORE) { | |
195 | do_update = true; | |
196 | /* | |
197 | * Do generate complement switch event for "close" | |
198 | * as "close" is reliable and wrong "open" won't | |
199 | * trigger unexpected behaviors. | |
200 | * Do not generate complement switch event for | |
201 | * "open" as "open" is not reliable and wrong | |
202 | * "close" will trigger unexpected behaviors. | |
203 | */ | |
204 | if (!state) { | |
205 | input_report_switch(button->input, | |
206 | SW_LID, state); | |
207 | input_sync(button->input); | |
208 | } | |
209 | } | |
210 | } | |
211 | /* Send the platform triggered reliable event */ | |
212 | if (do_update) { | |
213 | input_report_switch(button->input, SW_LID, !state); | |
214 | input_sync(button->input); | |
215 | button->last_state = !!state; | |
216 | button->last_time = ktime_get(); | |
217 | } | |
ee7e2265 LZ |
218 | |
219 | if (state) | |
33e4f80e | 220 | acpi_pm_wakeup_event(&device->dev); |
ee7e2265 LZ |
221 | |
222 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device); | |
223 | if (ret == NOTIFY_DONE) | |
224 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, | |
225 | device); | |
226 | if (ret == NOTIFY_DONE || ret == NOTIFY_OK) { | |
227 | /* | |
228 | * It is also regarded as success if the notifier_chain | |
229 | * returns NOTIFY_OK or NOTIFY_DONE. | |
230 | */ | |
231 | ret = 0; | |
232 | } | |
233 | return ret; | |
234 | } | |
235 | ||
b34a8030 AS |
236 | static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) |
237 | { | |
106c19e7 | 238 | struct acpi_device *device = seq->private; |
ee7e2265 | 239 | int state; |
b34a8030 | 240 | |
ee7e2265 | 241 | state = acpi_lid_evaluate_state(device); |
c0968f0e | 242 | seq_printf(seq, "state: %s\n", |
ee7e2265 | 243 | state < 0 ? "unsupported" : (state ? "open" : "closed")); |
d550d98d | 244 | return 0; |
b34a8030 AS |
245 | } |
246 | ||
247 | static int acpi_button_state_open_fs(struct inode *inode, struct file *file) | |
248 | { | |
d9dda78b | 249 | return single_open(file, acpi_button_state_seq_show, PDE_DATA(inode)); |
b34a8030 AS |
250 | } |
251 | ||
912b7427 ZR |
252 | static const struct file_operations acpi_button_state_fops = { |
253 | .owner = THIS_MODULE, | |
254 | .open = acpi_button_state_open_fs, | |
255 | .read = seq_read, | |
256 | .llseek = seq_lseek, | |
257 | .release = single_release, | |
258 | }; | |
b34a8030 | 259 | |
4be44fcd | 260 | static int acpi_button_add_fs(struct acpi_device *device) |
b34a8030 | 261 | { |
1bce8113 | 262 | struct acpi_button *button = acpi_driver_data(device); |
4be44fcd | 263 | struct proc_dir_entry *entry = NULL; |
912b7427 | 264 | int ret = 0; |
b34a8030 | 265 | |
912b7427 ZR |
266 | /* procfs I/F for ACPI lid device only */ |
267 | if (button->type != ACPI_BUTTON_TYPE_LID) | |
268 | return 0; | |
269 | ||
270 | if (acpi_button_dir || acpi_lid_dir) { | |
271 | printk(KERN_ERR PREFIX "More than one Lid device found!\n"); | |
272 | return -EEXIST; | |
b34a8030 AS |
273 | } |
274 | ||
912b7427 ZR |
275 | /* create /proc/acpi/button */ |
276 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); | |
277 | if (!acpi_button_dir) | |
d550d98d | 278 | return -ENODEV; |
b34a8030 | 279 | |
912b7427 ZR |
280 | /* create /proc/acpi/button/lid */ |
281 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
282 | if (!acpi_lid_dir) { | |
283 | ret = -ENODEV; | |
284 | goto remove_button_dir; | |
285 | } | |
b34a8030 | 286 | |
912b7427 ZR |
287 | /* create /proc/acpi/button/lid/LID/ */ |
288 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir); | |
289 | if (!acpi_device_dir(device)) { | |
290 | ret = -ENODEV; | |
291 | goto remove_lid_dir; | |
292 | } | |
b34a8030 | 293 | |
912b7427 ZR |
294 | /* create /proc/acpi/button/lid/LID/state */ |
295 | entry = proc_create_data(ACPI_BUTTON_FILE_STATE, | |
296 | S_IRUGO, acpi_device_dir(device), | |
297 | &acpi_button_state_fops, device); | |
298 | if (!entry) { | |
299 | ret = -ENODEV; | |
300 | goto remove_dev_dir; | |
b34a8030 AS |
301 | } |
302 | ||
912b7427 ZR |
303 | done: |
304 | return ret; | |
305 | ||
306 | remove_dev_dir: | |
307 | remove_proc_entry(acpi_device_bid(device), | |
308 | acpi_lid_dir); | |
309 | acpi_device_dir(device) = NULL; | |
310 | remove_lid_dir: | |
311 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
e370cc86 | 312 | acpi_lid_dir = NULL; |
912b7427 ZR |
313 | remove_button_dir: |
314 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
e370cc86 | 315 | acpi_button_dir = NULL; |
912b7427 | 316 | goto done; |
b34a8030 AS |
317 | } |
318 | ||
4be44fcd | 319 | static int acpi_button_remove_fs(struct acpi_device *device) |
b34a8030 | 320 | { |
c0968f0e | 321 | struct acpi_button *button = acpi_driver_data(device); |
b34a8030 | 322 | |
912b7427 ZR |
323 | if (button->type != ACPI_BUTTON_TYPE_LID) |
324 | return 0; | |
b34a8030 | 325 | |
912b7427 ZR |
326 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, |
327 | acpi_device_dir(device)); | |
328 | remove_proc_entry(acpi_device_bid(device), | |
329 | acpi_lid_dir); | |
330 | acpi_device_dir(device) = NULL; | |
331 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
e370cc86 | 332 | acpi_lid_dir = NULL; |
912b7427 | 333 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
e370cc86 | 334 | acpi_button_dir = NULL; |
b34a8030 | 335 | |
d550d98d | 336 | return 0; |
b34a8030 AS |
337 | } |
338 | ||
1da177e4 LT |
339 | /* -------------------------------------------------------------------------- |
340 | Driver Interface | |
341 | -------------------------------------------------------------------------- */ | |
7e12715e JB |
342 | int acpi_lid_notifier_register(struct notifier_block *nb) |
343 | { | |
344 | return blocking_notifier_chain_register(&acpi_lid_notifier, nb); | |
345 | } | |
346 | EXPORT_SYMBOL(acpi_lid_notifier_register); | |
347 | ||
348 | int acpi_lid_notifier_unregister(struct notifier_block *nb) | |
349 | { | |
350 | return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb); | |
351 | } | |
352 | EXPORT_SYMBOL(acpi_lid_notifier_unregister); | |
353 | ||
354 | int acpi_lid_open(void) | |
355 | { | |
2c907b72 JB |
356 | if (!lid_device) |
357 | return -ENODEV; | |
358 | ||
ee7e2265 | 359 | return acpi_lid_evaluate_state(lid_device); |
7e12715e JB |
360 | } |
361 | EXPORT_SYMBOL(acpi_lid_open); | |
362 | ||
ee7e2265 | 363 | static int acpi_lid_update_state(struct acpi_device *device) |
23de5d9e | 364 | { |
ee7e2265 | 365 | int state; |
50a4da89 | 366 | |
ee7e2265 LZ |
367 | state = acpi_lid_evaluate_state(device); |
368 | if (state < 0) | |
369 | return state; | |
7e12715e | 370 | |
ee7e2265 | 371 | return acpi_lid_notify_state(device, state); |
23de5d9e | 372 | } |
1da177e4 | 373 | |
3540c32a LZ |
374 | static void acpi_lid_initialize_state(struct acpi_device *device) |
375 | { | |
376 | switch (lid_init_state) { | |
377 | case ACPI_BUTTON_LID_INIT_OPEN: | |
378 | (void)acpi_lid_notify_state(device, 1); | |
379 | break; | |
f369fdf4 LZ |
380 | case ACPI_BUTTON_LID_INIT_METHOD: |
381 | (void)acpi_lid_update_state(device); | |
382 | break; | |
3540c32a LZ |
383 | case ACPI_BUTTON_LID_INIT_IGNORE: |
384 | default: | |
385 | break; | |
386 | } | |
387 | } | |
388 | ||
373cfc36 | 389 | static void acpi_button_notify(struct acpi_device *device, u32 event) |
1da177e4 | 390 | { |
373cfc36 | 391 | struct acpi_button *button = acpi_driver_data(device); |
c0968f0e | 392 | struct input_dev *input; |
1da177e4 | 393 | |
1da177e4 | 394 | switch (event) { |
373cfc36 BH |
395 | case ACPI_FIXED_HARDWARE_EVENT: |
396 | event = ACPI_BUTTON_NOTIFY_STATUS; | |
397 | /* fall through */ | |
1da177e4 | 398 | case ACPI_BUTTON_NOTIFY_STATUS: |
c0968f0e | 399 | input = button->input; |
c0968f0e | 400 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
ee7e2265 | 401 | acpi_lid_update_state(device); |
c0968f0e | 402 | } else { |
e71eeb2a RW |
403 | int keycode; |
404 | ||
33e4f80e | 405 | acpi_pm_wakeup_event(&device->dev); |
e71eeb2a RW |
406 | if (button->suspended) |
407 | break; | |
c0968f0e | 408 | |
e71eeb2a RW |
409 | keycode = test_bit(KEY_SLEEP, input->keybit) ? |
410 | KEY_SLEEP : KEY_POWER; | |
c0968f0e DT |
411 | input_report_key(input, keycode, 1); |
412 | input_sync(input); | |
413 | input_report_key(input, keycode, 0); | |
df316e93 | 414 | input_sync(input); |
1f83511b | 415 | |
0bf6368e LT |
416 | acpi_bus_generate_netlink_event( |
417 | device->pnp.device_class, | |
418 | dev_name(&device->dev), | |
419 | event, ++button->pushed); | |
c0968f0e | 420 | } |
1da177e4 LT |
421 | break; |
422 | default: | |
423 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 424 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
425 | break; |
426 | } | |
1da177e4 LT |
427 | } |
428 | ||
90692404 | 429 | #ifdef CONFIG_PM_SLEEP |
e71eeb2a RW |
430 | static int acpi_button_suspend(struct device *dev) |
431 | { | |
432 | struct acpi_device *device = to_acpi_device(dev); | |
433 | struct acpi_button *button = acpi_driver_data(device); | |
434 | ||
435 | button->suspended = true; | |
436 | return 0; | |
437 | } | |
438 | ||
1be532de | 439 | static int acpi_button_resume(struct device *dev) |
23de5d9e | 440 | { |
1be532de | 441 | struct acpi_device *device = to_acpi_device(dev); |
1bce8113 | 442 | struct acpi_button *button = acpi_driver_data(device); |
50a4da89 | 443 | |
e71eeb2a | 444 | button->suspended = false; |
3540c32a LZ |
445 | if (button->type == ACPI_BUTTON_TYPE_LID) |
446 | acpi_lid_initialize_state(device); | |
23de5d9e AS |
447 | return 0; |
448 | } | |
90692404 | 449 | #endif |
23de5d9e | 450 | |
c0968f0e DT |
451 | static int acpi_button_add(struct acpi_device *device) |
452 | { | |
c0968f0e DT |
453 | struct acpi_button *button; |
454 | struct input_dev *input; | |
620e112c TR |
455 | const char *hid = acpi_device_hid(device); |
456 | char *name, *class; | |
1bce8113 | 457 | int error; |
1da177e4 | 458 | |
c0968f0e | 459 | button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); |
1da177e4 | 460 | if (!button) |
d550d98d | 461 | return -ENOMEM; |
1da177e4 | 462 | |
db89b4f0 | 463 | device->driver_data = button; |
1da177e4 | 464 | |
c0968f0e DT |
465 | button->input = input = input_allocate_device(); |
466 | if (!input) { | |
467 | error = -ENOMEM; | |
468 | goto err_free_button; | |
469 | } | |
470 | ||
bf04a772 BH |
471 | name = acpi_device_name(device); |
472 | class = acpi_device_class(device); | |
473 | ||
d68b597c BH |
474 | if (!strcmp(hid, ACPI_BUTTON_HID_POWER) || |
475 | !strcmp(hid, ACPI_BUTTON_HID_POWERF)) { | |
1da177e4 | 476 | button->type = ACPI_BUTTON_TYPE_POWER; |
bf04a772 BH |
477 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); |
478 | sprintf(class, "%s/%s", | |
1da177e4 | 479 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
d68b597c BH |
480 | } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) || |
481 | !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { | |
1da177e4 | 482 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
bf04a772 BH |
483 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); |
484 | sprintf(class, "%s/%s", | |
1da177e4 | 485 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
bf04a772 | 486 | } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { |
1da177e4 | 487 | button->type = ACPI_BUTTON_TYPE_LID; |
bf04a772 BH |
488 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); |
489 | sprintf(class, "%s/%s", | |
1da177e4 | 490 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
dfa46c50 LZ |
491 | button->last_state = !!acpi_lid_evaluate_state(device); |
492 | button->last_time = ktime_get(); | |
4be44fcd | 493 | } else { |
bf04a772 | 494 | printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid); |
c0968f0e DT |
495 | error = -ENODEV; |
496 | goto err_free_input; | |
1da177e4 LT |
497 | } |
498 | ||
c0968f0e DT |
499 | error = acpi_button_add_fs(device); |
500 | if (error) | |
501 | goto err_free_input; | |
502 | ||
bf04a772 | 503 | snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); |
c0968f0e | 504 | |
bf04a772 | 505 | input->name = name; |
c0968f0e DT |
506 | input->phys = button->phys; |
507 | input->id.bustype = BUS_HOST; | |
508 | input->id.product = button->type; | |
3b34e523 | 509 | input->dev.parent = &device->dev; |
b34a8030 | 510 | |
1da177e4 | 511 | switch (button->type) { |
c0968f0e | 512 | case ACPI_BUTTON_TYPE_POWER: |
763f527b | 513 | input_set_capability(input, EV_KEY, KEY_POWER); |
1da177e4 | 514 | break; |
c0968f0e DT |
515 | |
516 | case ACPI_BUTTON_TYPE_SLEEP: | |
763f527b | 517 | input_set_capability(input, EV_KEY, KEY_SLEEP); |
1da177e4 | 518 | break; |
c0968f0e DT |
519 | |
520 | case ACPI_BUTTON_TYPE_LID: | |
763f527b | 521 | input_set_capability(input, EV_SW, SW_LID); |
1da177e4 LT |
522 | break; |
523 | } | |
524 | ||
c0968f0e DT |
525 | error = input_register_device(input); |
526 | if (error) | |
373cfc36 | 527 | goto err_remove_fs; |
7e12715e | 528 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
3540c32a | 529 | acpi_lid_initialize_state(device); |
7e12715e JB |
530 | /* |
531 | * This assumes there's only one lid device, or if there are | |
532 | * more we only care about the last one... | |
533 | */ | |
534 | lid_device = device; | |
535 | } | |
1da177e4 | 536 | |
33e4f80e | 537 | device_init_wakeup(&device->dev, true); |
bf04a772 | 538 | printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device)); |
c0968f0e | 539 | return 0; |
1da177e4 | 540 | |
c0968f0e DT |
541 | err_remove_fs: |
542 | acpi_button_remove_fs(device); | |
543 | err_free_input: | |
544 | input_free_device(input); | |
545 | err_free_button: | |
546 | kfree(button); | |
547 | return error; | |
1da177e4 LT |
548 | } |
549 | ||
51fac838 | 550 | static int acpi_button_remove(struct acpi_device *device) |
1da177e4 | 551 | { |
1bce8113 | 552 | struct acpi_button *button = acpi_driver_data(device); |
1da177e4 | 553 | |
4be44fcd | 554 | acpi_button_remove_fs(device); |
c0968f0e | 555 | input_unregister_device(button->input); |
1da177e4 | 556 | kfree(button); |
d550d98d | 557 | return 0; |
1da177e4 LT |
558 | } |
559 | ||
3540c32a LZ |
560 | static int param_set_lid_init_state(const char *val, struct kernel_param *kp) |
561 | { | |
562 | int result = 0; | |
563 | ||
564 | if (!strncmp(val, "open", sizeof("open") - 1)) { | |
565 | lid_init_state = ACPI_BUTTON_LID_INIT_OPEN; | |
566 | pr_info("Notify initial lid state as open\n"); | |
f369fdf4 LZ |
567 | } else if (!strncmp(val, "method", sizeof("method") - 1)) { |
568 | lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; | |
569 | pr_info("Notify initial lid state with _LID return value\n"); | |
3540c32a LZ |
570 | } else if (!strncmp(val, "ignore", sizeof("ignore") - 1)) { |
571 | lid_init_state = ACPI_BUTTON_LID_INIT_IGNORE; | |
572 | pr_info("Do not notify initial lid state\n"); | |
573 | } else | |
574 | result = -EINVAL; | |
575 | return result; | |
576 | } | |
577 | ||
578 | static int param_get_lid_init_state(char *buffer, struct kernel_param *kp) | |
579 | { | |
580 | switch (lid_init_state) { | |
581 | case ACPI_BUTTON_LID_INIT_OPEN: | |
582 | return sprintf(buffer, "open"); | |
f369fdf4 LZ |
583 | case ACPI_BUTTON_LID_INIT_METHOD: |
584 | return sprintf(buffer, "method"); | |
3540c32a LZ |
585 | case ACPI_BUTTON_LID_INIT_IGNORE: |
586 | return sprintf(buffer, "ignore"); | |
587 | default: | |
588 | return sprintf(buffer, "invalid"); | |
589 | } | |
590 | return 0; | |
591 | } | |
592 | ||
593 | module_param_call(lid_init_state, | |
594 | param_set_lid_init_state, param_get_lid_init_state, | |
595 | NULL, 0644); | |
596 | MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state"); | |
597 | ||
466e78f7 | 598 | module_acpi_driver(acpi_button_driver); |