]>
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 | ||
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; |
84d3f6b7 | 393 | int users; |
1da177e4 | 394 | |
1da177e4 | 395 | switch (event) { |
373cfc36 BH |
396 | case ACPI_FIXED_HARDWARE_EVENT: |
397 | event = ACPI_BUTTON_NOTIFY_STATUS; | |
398 | /* fall through */ | |
1da177e4 | 399 | case ACPI_BUTTON_NOTIFY_STATUS: |
c0968f0e | 400 | input = button->input; |
c0968f0e | 401 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
84d3f6b7 HG |
402 | mutex_lock(&button->input->mutex); |
403 | users = button->input->users; | |
404 | mutex_unlock(&button->input->mutex); | |
405 | if (users) | |
406 | acpi_lid_update_state(device); | |
c0968f0e | 407 | } else { |
e71eeb2a RW |
408 | int keycode; |
409 | ||
33e4f80e | 410 | acpi_pm_wakeup_event(&device->dev); |
e71eeb2a RW |
411 | if (button->suspended) |
412 | break; | |
c0968f0e | 413 | |
e71eeb2a RW |
414 | keycode = test_bit(KEY_SLEEP, input->keybit) ? |
415 | KEY_SLEEP : KEY_POWER; | |
c0968f0e DT |
416 | input_report_key(input, keycode, 1); |
417 | input_sync(input); | |
418 | input_report_key(input, keycode, 0); | |
df316e93 | 419 | input_sync(input); |
1f83511b | 420 | |
0bf6368e LT |
421 | acpi_bus_generate_netlink_event( |
422 | device->pnp.device_class, | |
423 | dev_name(&device->dev), | |
424 | event, ++button->pushed); | |
c0968f0e | 425 | } |
1da177e4 LT |
426 | break; |
427 | default: | |
428 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 429 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
430 | break; |
431 | } | |
1da177e4 LT |
432 | } |
433 | ||
90692404 | 434 | #ifdef CONFIG_PM_SLEEP |
e71eeb2a RW |
435 | static int acpi_button_suspend(struct device *dev) |
436 | { | |
437 | struct acpi_device *device = to_acpi_device(dev); | |
438 | struct acpi_button *button = acpi_driver_data(device); | |
439 | ||
440 | button->suspended = true; | |
441 | return 0; | |
442 | } | |
443 | ||
1be532de | 444 | static int acpi_button_resume(struct device *dev) |
23de5d9e | 445 | { |
1be532de | 446 | struct acpi_device *device = to_acpi_device(dev); |
1bce8113 | 447 | struct acpi_button *button = acpi_driver_data(device); |
50a4da89 | 448 | |
e71eeb2a | 449 | button->suspended = false; |
84d3f6b7 | 450 | if (button->type == ACPI_BUTTON_TYPE_LID && button->input->users) |
3540c32a | 451 | acpi_lid_initialize_state(device); |
23de5d9e AS |
452 | return 0; |
453 | } | |
90692404 | 454 | #endif |
23de5d9e | 455 | |
84d3f6b7 HG |
456 | static int acpi_lid_input_open(struct input_dev *input) |
457 | { | |
458 | struct acpi_device *device = input_get_drvdata(input); | |
459 | struct acpi_button *button = acpi_driver_data(device); | |
460 | ||
461 | button->last_state = !!acpi_lid_evaluate_state(device); | |
462 | button->last_time = ktime_get(); | |
463 | acpi_lid_initialize_state(device); | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
c0968f0e DT |
468 | static int acpi_button_add(struct acpi_device *device) |
469 | { | |
c0968f0e DT |
470 | struct acpi_button *button; |
471 | struct input_dev *input; | |
620e112c TR |
472 | const char *hid = acpi_device_hid(device); |
473 | char *name, *class; | |
1bce8113 | 474 | int error; |
1da177e4 | 475 | |
c0968f0e | 476 | button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); |
1da177e4 | 477 | if (!button) |
d550d98d | 478 | return -ENOMEM; |
1da177e4 | 479 | |
db89b4f0 | 480 | device->driver_data = button; |
1da177e4 | 481 | |
c0968f0e DT |
482 | button->input = input = input_allocate_device(); |
483 | if (!input) { | |
484 | error = -ENOMEM; | |
485 | goto err_free_button; | |
486 | } | |
487 | ||
bf04a772 BH |
488 | name = acpi_device_name(device); |
489 | class = acpi_device_class(device); | |
490 | ||
d68b597c BH |
491 | if (!strcmp(hid, ACPI_BUTTON_HID_POWER) || |
492 | !strcmp(hid, ACPI_BUTTON_HID_POWERF)) { | |
1da177e4 | 493 | button->type = ACPI_BUTTON_TYPE_POWER; |
bf04a772 BH |
494 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); |
495 | sprintf(class, "%s/%s", | |
1da177e4 | 496 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
d68b597c BH |
497 | } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) || |
498 | !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { | |
1da177e4 | 499 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
bf04a772 BH |
500 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); |
501 | sprintf(class, "%s/%s", | |
1da177e4 | 502 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
bf04a772 | 503 | } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { |
1da177e4 | 504 | button->type = ACPI_BUTTON_TYPE_LID; |
bf04a772 BH |
505 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); |
506 | sprintf(class, "%s/%s", | |
1da177e4 | 507 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
84d3f6b7 | 508 | input->open = acpi_lid_input_open; |
4be44fcd | 509 | } else { |
bf04a772 | 510 | printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid); |
c0968f0e DT |
511 | error = -ENODEV; |
512 | goto err_free_input; | |
1da177e4 LT |
513 | } |
514 | ||
c0968f0e DT |
515 | error = acpi_button_add_fs(device); |
516 | if (error) | |
517 | goto err_free_input; | |
518 | ||
bf04a772 | 519 | snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); |
c0968f0e | 520 | |
bf04a772 | 521 | input->name = name; |
c0968f0e DT |
522 | input->phys = button->phys; |
523 | input->id.bustype = BUS_HOST; | |
524 | input->id.product = button->type; | |
3b34e523 | 525 | input->dev.parent = &device->dev; |
b34a8030 | 526 | |
1da177e4 | 527 | switch (button->type) { |
c0968f0e | 528 | case ACPI_BUTTON_TYPE_POWER: |
763f527b | 529 | input_set_capability(input, EV_KEY, KEY_POWER); |
1da177e4 | 530 | break; |
c0968f0e DT |
531 | |
532 | case ACPI_BUTTON_TYPE_SLEEP: | |
763f527b | 533 | input_set_capability(input, EV_KEY, KEY_SLEEP); |
1da177e4 | 534 | break; |
c0968f0e DT |
535 | |
536 | case ACPI_BUTTON_TYPE_LID: | |
763f527b | 537 | input_set_capability(input, EV_SW, SW_LID); |
1da177e4 LT |
538 | break; |
539 | } | |
540 | ||
84d3f6b7 | 541 | input_set_drvdata(input, device); |
c0968f0e DT |
542 | error = input_register_device(input); |
543 | if (error) | |
373cfc36 | 544 | goto err_remove_fs; |
7e12715e | 545 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
7e12715e JB |
546 | /* |
547 | * This assumes there's only one lid device, or if there are | |
548 | * more we only care about the last one... | |
549 | */ | |
550 | lid_device = device; | |
551 | } | |
1da177e4 | 552 | |
33e4f80e | 553 | device_init_wakeup(&device->dev, true); |
bf04a772 | 554 | printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device)); |
c0968f0e | 555 | return 0; |
1da177e4 | 556 | |
c0968f0e DT |
557 | err_remove_fs: |
558 | acpi_button_remove_fs(device); | |
559 | err_free_input: | |
560 | input_free_device(input); | |
561 | err_free_button: | |
562 | kfree(button); | |
563 | return error; | |
1da177e4 LT |
564 | } |
565 | ||
51fac838 | 566 | static int acpi_button_remove(struct acpi_device *device) |
1da177e4 | 567 | { |
1bce8113 | 568 | struct acpi_button *button = acpi_driver_data(device); |
1da177e4 | 569 | |
4be44fcd | 570 | acpi_button_remove_fs(device); |
c0968f0e | 571 | input_unregister_device(button->input); |
1da177e4 | 572 | kfree(button); |
d550d98d | 573 | return 0; |
1da177e4 LT |
574 | } |
575 | ||
e4dca7b7 KC |
576 | static int param_set_lid_init_state(const char *val, |
577 | const struct kernel_param *kp) | |
3540c32a LZ |
578 | { |
579 | int result = 0; | |
580 | ||
581 | if (!strncmp(val, "open", sizeof("open") - 1)) { | |
582 | lid_init_state = ACPI_BUTTON_LID_INIT_OPEN; | |
583 | pr_info("Notify initial lid state as open\n"); | |
f369fdf4 LZ |
584 | } else if (!strncmp(val, "method", sizeof("method") - 1)) { |
585 | lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; | |
586 | pr_info("Notify initial lid state with _LID return value\n"); | |
3540c32a LZ |
587 | } else if (!strncmp(val, "ignore", sizeof("ignore") - 1)) { |
588 | lid_init_state = ACPI_BUTTON_LID_INIT_IGNORE; | |
589 | pr_info("Do not notify initial lid state\n"); | |
590 | } else | |
591 | result = -EINVAL; | |
592 | return result; | |
593 | } | |
594 | ||
e4dca7b7 KC |
595 | static int param_get_lid_init_state(char *buffer, |
596 | const struct kernel_param *kp) | |
3540c32a LZ |
597 | { |
598 | switch (lid_init_state) { | |
599 | case ACPI_BUTTON_LID_INIT_OPEN: | |
600 | return sprintf(buffer, "open"); | |
f369fdf4 LZ |
601 | case ACPI_BUTTON_LID_INIT_METHOD: |
602 | return sprintf(buffer, "method"); | |
3540c32a LZ |
603 | case ACPI_BUTTON_LID_INIT_IGNORE: |
604 | return sprintf(buffer, "ignore"); | |
605 | default: | |
606 | return sprintf(buffer, "invalid"); | |
607 | } | |
608 | return 0; | |
609 | } | |
610 | ||
611 | module_param_call(lid_init_state, | |
612 | param_set_lid_init_state, param_get_lid_init_state, | |
613 | NULL, 0644); | |
614 | MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state"); | |
615 | ||
ec19c297 AB |
616 | static int acpi_button_register_driver(struct acpi_driver *driver) |
617 | { | |
618 | /* | |
619 | * Modules such as nouveau.ko and i915.ko have a link time dependency | |
620 | * on acpi_lid_open(), and would therefore not be loadable on ACPI | |
621 | * capable kernels booted in non-ACPI mode if the return value of | |
622 | * acpi_bus_register_driver() is returned from here with ACPI disabled | |
623 | * when this driver is built as a module. | |
624 | */ | |
625 | if (acpi_disabled) | |
626 | return 0; | |
627 | ||
628 | return acpi_bus_register_driver(driver); | |
629 | } | |
630 | ||
631 | static void acpi_button_unregister_driver(struct acpi_driver *driver) | |
632 | { | |
633 | if (!acpi_disabled) | |
634 | acpi_bus_unregister_driver(driver); | |
635 | } | |
636 | ||
637 | module_driver(acpi_button_driver, acpi_button_register_driver, | |
638 | acpi_button_unregister_driver); |