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> |
9e811e19 | 33 | #include <linux/dmi.h> |
6270da6f | 34 | #include <acpi/button.h> |
1da177e4 | 35 | |
a192a958 LB |
36 | #define PREFIX "ACPI: " |
37 | ||
1da177e4 | 38 | #define ACPI_BUTTON_CLASS "button" |
b34a8030 AS |
39 | #define ACPI_BUTTON_FILE_INFO "info" |
40 | #define ACPI_BUTTON_FILE_STATE "state" | |
41 | #define ACPI_BUTTON_TYPE_UNKNOWN 0x00 | |
1da177e4 LT |
42 | #define ACPI_BUTTON_NOTIFY_STATUS 0x80 |
43 | ||
44 | #define ACPI_BUTTON_SUBCLASS_POWER "power" | |
4be44fcd | 45 | #define ACPI_BUTTON_HID_POWER "PNP0C0C" |
d68b597c | 46 | #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button" |
1da177e4 | 47 | #define ACPI_BUTTON_TYPE_POWER 0x01 |
1da177e4 LT |
48 | |
49 | #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" | |
50 | #define ACPI_BUTTON_HID_SLEEP "PNP0C0E" | |
d68b597c | 51 | #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button" |
1da177e4 | 52 | #define ACPI_BUTTON_TYPE_SLEEP 0x03 |
1da177e4 LT |
53 | |
54 | #define ACPI_BUTTON_SUBCLASS_LID "lid" | |
55 | #define ACPI_BUTTON_HID_LID "PNP0C0D" | |
56 | #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" | |
57 | #define ACPI_BUTTON_TYPE_LID 0x05 | |
58 | ||
3540c32a LZ |
59 | #define ACPI_BUTTON_LID_INIT_IGNORE 0x00 |
60 | #define ACPI_BUTTON_LID_INIT_OPEN 0x01 | |
f369fdf4 | 61 | #define ACPI_BUTTON_LID_INIT_METHOD 0x02 |
3540c32a | 62 | |
1da177e4 | 63 | #define _COMPONENT ACPI_BUTTON_COMPONENT |
f52fd66d | 64 | ACPI_MODULE_NAME("button"); |
1da177e4 | 65 | |
c0968f0e | 66 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 67 | MODULE_DESCRIPTION("ACPI Button Driver"); |
1da177e4 LT |
68 | MODULE_LICENSE("GPL"); |
69 | ||
1ba90e3a TR |
70 | static const struct acpi_device_id button_device_ids[] = { |
71 | {ACPI_BUTTON_HID_LID, 0}, | |
72 | {ACPI_BUTTON_HID_SLEEP, 0}, | |
73 | {ACPI_BUTTON_HID_SLEEPF, 0}, | |
74 | {ACPI_BUTTON_HID_POWER, 0}, | |
75 | {ACPI_BUTTON_HID_POWERF, 0}, | |
76 | {"", 0}, | |
77 | }; | |
78 | MODULE_DEVICE_TABLE(acpi, button_device_ids); | |
79 | ||
9e811e19 HG |
80 | /* |
81 | * Some devices which don't even have a lid in anyway have a broken _LID | |
82 | * method (e.g. pointing to a floating gpio pin) causing spurious LID events. | |
83 | */ | |
84 | static const struct dmi_system_id lid_blacklst[] = { | |
85 | { | |
86 | /* GP-electronic T701 */ | |
87 | .matches = { | |
88 | DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), | |
89 | DMI_MATCH(DMI_PRODUCT_NAME, "T701"), | |
90 | DMI_MATCH(DMI_BIOS_VERSION, "BYT70A.YNCHENG.WIN.007"), | |
91 | }, | |
92 | }, | |
93 | {} | |
94 | }; | |
95 | ||
4be44fcd | 96 | static int acpi_button_add(struct acpi_device *device); |
51fac838 | 97 | static int acpi_button_remove(struct acpi_device *device); |
373cfc36 | 98 | static void acpi_button_notify(struct acpi_device *device, u32 event); |
1da177e4 | 99 | |
90692404 | 100 | #ifdef CONFIG_PM_SLEEP |
e71eeb2a | 101 | static int acpi_button_suspend(struct device *dev); |
1be532de | 102 | static int acpi_button_resume(struct device *dev); |
2de9fd17 | 103 | #else |
e71eeb2a | 104 | #define acpi_button_suspend NULL |
2de9fd17 | 105 | #define acpi_button_resume NULL |
90692404 | 106 | #endif |
e71eeb2a | 107 | static SIMPLE_DEV_PM_OPS(acpi_button_pm, acpi_button_suspend, acpi_button_resume); |
1be532de | 108 | |
1da177e4 | 109 | static struct acpi_driver acpi_button_driver = { |
c2b6705b | 110 | .name = "button", |
4be44fcd | 111 | .class = ACPI_BUTTON_CLASS, |
1ba90e3a | 112 | .ids = button_device_ids, |
4be44fcd LB |
113 | .ops = { |
114 | .add = acpi_button_add, | |
115 | .remove = acpi_button_remove, | |
373cfc36 | 116 | .notify = acpi_button_notify, |
c0968f0e | 117 | }, |
1be532de | 118 | .drv.pm = &acpi_button_pm, |
1da177e4 LT |
119 | }; |
120 | ||
121 | struct acpi_button { | |
c0968f0e DT |
122 | unsigned int type; |
123 | struct input_dev *input; | |
124 | char phys[32]; /* for input device */ | |
4be44fcd | 125 | unsigned long pushed; |
dfa46c50 LZ |
126 | int last_state; |
127 | ktime_t last_time; | |
e71eeb2a | 128 | bool suspended; |
1da177e4 LT |
129 | }; |
130 | ||
7e12715e JB |
131 | static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier); |
132 | static struct acpi_device *lid_device; | |
878d8db0 | 133 | static u8 lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; |
7e12715e | 134 | |
dfa46c50 LZ |
135 | static unsigned long lid_report_interval __read_mostly = 500; |
136 | module_param(lid_report_interval, ulong, 0644); | |
137 | MODULE_PARM_DESC(lid_report_interval, "Interval (ms) between lid key events"); | |
138 | ||
b34a8030 AS |
139 | /* -------------------------------------------------------------------------- |
140 | FS Interface (/proc) | |
141 | -------------------------------------------------------------------------- */ | |
142 | ||
4be44fcd | 143 | static struct proc_dir_entry *acpi_button_dir; |
912b7427 | 144 | static struct proc_dir_entry *acpi_lid_dir; |
4be44fcd | 145 | |
ee7e2265 LZ |
146 | static int acpi_lid_evaluate_state(struct acpi_device *device) |
147 | { | |
148 | unsigned long long lid_state; | |
149 | acpi_status status; | |
150 | ||
151 | status = acpi_evaluate_integer(device->handle, "_LID", NULL, &lid_state); | |
152 | if (ACPI_FAILURE(status)) | |
153 | return -ENODEV; | |
154 | ||
155 | return lid_state ? 1 : 0; | |
156 | } | |
157 | ||
158 | static int acpi_lid_notify_state(struct acpi_device *device, int state) | |
159 | { | |
160 | struct acpi_button *button = acpi_driver_data(device); | |
161 | int ret; | |
dfa46c50 LZ |
162 | ktime_t next_report; |
163 | bool do_update; | |
164 | ||
165 | /* | |
166 | * In lid_init_state=ignore mode, if user opens/closes lid | |
167 | * frequently with "open" missing, and "last_time" is also updated | |
168 | * frequently, "close" cannot be delivered to the userspace. | |
169 | * So "last_time" is only updated after a timeout or an actual | |
170 | * switch. | |
171 | */ | |
172 | if (lid_init_state != ACPI_BUTTON_LID_INIT_IGNORE || | |
173 | button->last_state != !!state) | |
174 | do_update = true; | |
175 | else | |
176 | do_update = false; | |
177 | ||
178 | next_report = ktime_add(button->last_time, | |
179 | ms_to_ktime(lid_report_interval)); | |
180 | if (button->last_state == !!state && | |
181 | ktime_after(ktime_get(), next_report)) { | |
182 | /* Complain the buggy firmware */ | |
183 | pr_warn_once("The lid device is not compliant to SW_LID.\n"); | |
ee7e2265 | 184 | |
dfa46c50 LZ |
185 | /* |
186 | * Send the unreliable complement switch event: | |
187 | * | |
188 | * On most platforms, the lid device is reliable. However | |
189 | * there are exceptions: | |
190 | * 1. Platforms returning initial lid state as "close" by | |
191 | * default after booting/resuming: | |
192 | * https://bugzilla.kernel.org/show_bug.cgi?id=89211 | |
193 | * https://bugzilla.kernel.org/show_bug.cgi?id=106151 | |
194 | * 2. Platforms never reporting "open" events: | |
195 | * https://bugzilla.kernel.org/show_bug.cgi?id=106941 | |
196 | * On these buggy platforms, the usage model of the ACPI | |
197 | * lid device actually is: | |
198 | * 1. The initial returning value of _LID may not be | |
199 | * reliable. | |
200 | * 2. The open event may not be reliable. | |
201 | * 3. The close event is reliable. | |
202 | * | |
203 | * But SW_LID is typed as input switch event, the input | |
204 | * layer checks if the event is redundant. Hence if the | |
205 | * state is not switched, the userspace cannot see this | |
206 | * platform triggered reliable event. By inserting a | |
207 | * complement switch event, it then is guaranteed that the | |
208 | * platform triggered reliable one can always be seen by | |
209 | * the userspace. | |
210 | */ | |
211 | if (lid_init_state == ACPI_BUTTON_LID_INIT_IGNORE) { | |
212 | do_update = true; | |
213 | /* | |
214 | * Do generate complement switch event for "close" | |
215 | * as "close" is reliable and wrong "open" won't | |
216 | * trigger unexpected behaviors. | |
217 | * Do not generate complement switch event for | |
218 | * "open" as "open" is not reliable and wrong | |
219 | * "close" will trigger unexpected behaviors. | |
220 | */ | |
221 | if (!state) { | |
222 | input_report_switch(button->input, | |
223 | SW_LID, state); | |
224 | input_sync(button->input); | |
225 | } | |
226 | } | |
227 | } | |
228 | /* Send the platform triggered reliable event */ | |
229 | if (do_update) { | |
ae35d656 HG |
230 | acpi_handle_debug(device->handle, "ACPI LID %s\n", |
231 | state ? "open" : "closed"); | |
dfa46c50 LZ |
232 | input_report_switch(button->input, SW_LID, !state); |
233 | input_sync(button->input); | |
234 | button->last_state = !!state; | |
235 | button->last_time = ktime_get(); | |
236 | } | |
ee7e2265 LZ |
237 | |
238 | if (state) | |
33e4f80e | 239 | acpi_pm_wakeup_event(&device->dev); |
ee7e2265 LZ |
240 | |
241 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device); | |
242 | if (ret == NOTIFY_DONE) | |
243 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, | |
244 | device); | |
245 | if (ret == NOTIFY_DONE || ret == NOTIFY_OK) { | |
246 | /* | |
247 | * It is also regarded as success if the notifier_chain | |
248 | * returns NOTIFY_OK or NOTIFY_DONE. | |
249 | */ | |
250 | ret = 0; | |
251 | } | |
252 | return ret; | |
253 | } | |
254 | ||
b34a8030 AS |
255 | static int acpi_button_state_seq_show(struct seq_file *seq, void *offset) |
256 | { | |
106c19e7 | 257 | struct acpi_device *device = seq->private; |
ee7e2265 | 258 | int state; |
b34a8030 | 259 | |
ee7e2265 | 260 | state = acpi_lid_evaluate_state(device); |
c0968f0e | 261 | seq_printf(seq, "state: %s\n", |
ee7e2265 | 262 | state < 0 ? "unsupported" : (state ? "open" : "closed")); |
d550d98d | 263 | return 0; |
b34a8030 AS |
264 | } |
265 | ||
4be44fcd | 266 | static int acpi_button_add_fs(struct acpi_device *device) |
b34a8030 | 267 | { |
1bce8113 | 268 | struct acpi_button *button = acpi_driver_data(device); |
4be44fcd | 269 | struct proc_dir_entry *entry = NULL; |
912b7427 | 270 | int ret = 0; |
b34a8030 | 271 | |
912b7427 ZR |
272 | /* procfs I/F for ACPI lid device only */ |
273 | if (button->type != ACPI_BUTTON_TYPE_LID) | |
274 | return 0; | |
275 | ||
276 | if (acpi_button_dir || acpi_lid_dir) { | |
277 | printk(KERN_ERR PREFIX "More than one Lid device found!\n"); | |
278 | return -EEXIST; | |
b34a8030 AS |
279 | } |
280 | ||
912b7427 ZR |
281 | /* create /proc/acpi/button */ |
282 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); | |
283 | if (!acpi_button_dir) | |
d550d98d | 284 | return -ENODEV; |
b34a8030 | 285 | |
912b7427 ZR |
286 | /* create /proc/acpi/button/lid */ |
287 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
288 | if (!acpi_lid_dir) { | |
289 | ret = -ENODEV; | |
290 | goto remove_button_dir; | |
291 | } | |
b34a8030 | 292 | |
912b7427 ZR |
293 | /* create /proc/acpi/button/lid/LID/ */ |
294 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir); | |
295 | if (!acpi_device_dir(device)) { | |
296 | ret = -ENODEV; | |
297 | goto remove_lid_dir; | |
298 | } | |
b34a8030 | 299 | |
912b7427 | 300 | /* create /proc/acpi/button/lid/LID/state */ |
3f3942ac CH |
301 | entry = proc_create_single_data(ACPI_BUTTON_FILE_STATE, S_IRUGO, |
302 | acpi_device_dir(device), acpi_button_state_seq_show, | |
303 | device); | |
912b7427 ZR |
304 | if (!entry) { |
305 | ret = -ENODEV; | |
306 | goto remove_dev_dir; | |
b34a8030 AS |
307 | } |
308 | ||
912b7427 ZR |
309 | done: |
310 | return ret; | |
311 | ||
312 | remove_dev_dir: | |
313 | remove_proc_entry(acpi_device_bid(device), | |
314 | acpi_lid_dir); | |
315 | acpi_device_dir(device) = NULL; | |
316 | remove_lid_dir: | |
317 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
e370cc86 | 318 | acpi_lid_dir = NULL; |
912b7427 ZR |
319 | remove_button_dir: |
320 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
e370cc86 | 321 | acpi_button_dir = NULL; |
912b7427 | 322 | goto done; |
b34a8030 AS |
323 | } |
324 | ||
4be44fcd | 325 | static int acpi_button_remove_fs(struct acpi_device *device) |
b34a8030 | 326 | { |
c0968f0e | 327 | struct acpi_button *button = acpi_driver_data(device); |
b34a8030 | 328 | |
912b7427 ZR |
329 | if (button->type != ACPI_BUTTON_TYPE_LID) |
330 | return 0; | |
b34a8030 | 331 | |
912b7427 ZR |
332 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, |
333 | acpi_device_dir(device)); | |
334 | remove_proc_entry(acpi_device_bid(device), | |
335 | acpi_lid_dir); | |
336 | acpi_device_dir(device) = NULL; | |
337 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
e370cc86 | 338 | acpi_lid_dir = NULL; |
912b7427 | 339 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
e370cc86 | 340 | acpi_button_dir = NULL; |
b34a8030 | 341 | |
d550d98d | 342 | return 0; |
b34a8030 AS |
343 | } |
344 | ||
1da177e4 LT |
345 | /* -------------------------------------------------------------------------- |
346 | Driver Interface | |
347 | -------------------------------------------------------------------------- */ | |
7e12715e JB |
348 | int acpi_lid_notifier_register(struct notifier_block *nb) |
349 | { | |
350 | return blocking_notifier_chain_register(&acpi_lid_notifier, nb); | |
351 | } | |
352 | EXPORT_SYMBOL(acpi_lid_notifier_register); | |
353 | ||
354 | int acpi_lid_notifier_unregister(struct notifier_block *nb) | |
355 | { | |
356 | return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb); | |
357 | } | |
358 | EXPORT_SYMBOL(acpi_lid_notifier_unregister); | |
359 | ||
360 | int acpi_lid_open(void) | |
361 | { | |
2c907b72 JB |
362 | if (!lid_device) |
363 | return -ENODEV; | |
364 | ||
ee7e2265 | 365 | return acpi_lid_evaluate_state(lid_device); |
7e12715e JB |
366 | } |
367 | EXPORT_SYMBOL(acpi_lid_open); | |
368 | ||
ee7e2265 | 369 | static int acpi_lid_update_state(struct acpi_device *device) |
23de5d9e | 370 | { |
ee7e2265 | 371 | int state; |
50a4da89 | 372 | |
ee7e2265 LZ |
373 | state = acpi_lid_evaluate_state(device); |
374 | if (state < 0) | |
375 | return state; | |
7e12715e | 376 | |
ee7e2265 | 377 | return acpi_lid_notify_state(device, state); |
23de5d9e | 378 | } |
1da177e4 | 379 | |
3540c32a LZ |
380 | static void acpi_lid_initialize_state(struct acpi_device *device) |
381 | { | |
382 | switch (lid_init_state) { | |
383 | case ACPI_BUTTON_LID_INIT_OPEN: | |
384 | (void)acpi_lid_notify_state(device, 1); | |
385 | break; | |
f369fdf4 LZ |
386 | case ACPI_BUTTON_LID_INIT_METHOD: |
387 | (void)acpi_lid_update_state(device); | |
388 | break; | |
3540c32a LZ |
389 | case ACPI_BUTTON_LID_INIT_IGNORE: |
390 | default: | |
391 | break; | |
392 | } | |
393 | } | |
394 | ||
373cfc36 | 395 | static void acpi_button_notify(struct acpi_device *device, u32 event) |
1da177e4 | 396 | { |
373cfc36 | 397 | struct acpi_button *button = acpi_driver_data(device); |
c0968f0e | 398 | struct input_dev *input; |
84d3f6b7 | 399 | int users; |
1da177e4 | 400 | |
1da177e4 | 401 | switch (event) { |
373cfc36 BH |
402 | case ACPI_FIXED_HARDWARE_EVENT: |
403 | event = ACPI_BUTTON_NOTIFY_STATUS; | |
404 | /* fall through */ | |
1da177e4 | 405 | case ACPI_BUTTON_NOTIFY_STATUS: |
c0968f0e | 406 | input = button->input; |
c0968f0e | 407 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
84d3f6b7 HG |
408 | mutex_lock(&button->input->mutex); |
409 | users = button->input->users; | |
410 | mutex_unlock(&button->input->mutex); | |
411 | if (users) | |
412 | acpi_lid_update_state(device); | |
c0968f0e | 413 | } else { |
e71eeb2a RW |
414 | int keycode; |
415 | ||
33e4f80e | 416 | acpi_pm_wakeup_event(&device->dev); |
e71eeb2a RW |
417 | if (button->suspended) |
418 | break; | |
c0968f0e | 419 | |
e71eeb2a RW |
420 | keycode = test_bit(KEY_SLEEP, input->keybit) ? |
421 | KEY_SLEEP : KEY_POWER; | |
c0968f0e DT |
422 | input_report_key(input, keycode, 1); |
423 | input_sync(input); | |
424 | input_report_key(input, keycode, 0); | |
df316e93 | 425 | input_sync(input); |
1f83511b | 426 | |
0bf6368e LT |
427 | acpi_bus_generate_netlink_event( |
428 | device->pnp.device_class, | |
429 | dev_name(&device->dev), | |
430 | event, ++button->pushed); | |
c0968f0e | 431 | } |
1da177e4 LT |
432 | break; |
433 | default: | |
434 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 435 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
436 | break; |
437 | } | |
1da177e4 LT |
438 | } |
439 | ||
90692404 | 440 | #ifdef CONFIG_PM_SLEEP |
e71eeb2a RW |
441 | static int acpi_button_suspend(struct device *dev) |
442 | { | |
443 | struct acpi_device *device = to_acpi_device(dev); | |
444 | struct acpi_button *button = acpi_driver_data(device); | |
445 | ||
446 | button->suspended = true; | |
447 | return 0; | |
448 | } | |
449 | ||
1be532de | 450 | static int acpi_button_resume(struct device *dev) |
23de5d9e | 451 | { |
1be532de | 452 | struct acpi_device *device = to_acpi_device(dev); |
1bce8113 | 453 | struct acpi_button *button = acpi_driver_data(device); |
50a4da89 | 454 | |
e71eeb2a | 455 | button->suspended = false; |
84d3f6b7 | 456 | if (button->type == ACPI_BUTTON_TYPE_LID && button->input->users) |
3540c32a | 457 | acpi_lid_initialize_state(device); |
23de5d9e AS |
458 | return 0; |
459 | } | |
90692404 | 460 | #endif |
23de5d9e | 461 | |
84d3f6b7 HG |
462 | static int acpi_lid_input_open(struct input_dev *input) |
463 | { | |
464 | struct acpi_device *device = input_get_drvdata(input); | |
465 | struct acpi_button *button = acpi_driver_data(device); | |
466 | ||
467 | button->last_state = !!acpi_lid_evaluate_state(device); | |
468 | button->last_time = ktime_get(); | |
469 | acpi_lid_initialize_state(device); | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
c0968f0e DT |
474 | static int acpi_button_add(struct acpi_device *device) |
475 | { | |
c0968f0e DT |
476 | struct acpi_button *button; |
477 | struct input_dev *input; | |
620e112c TR |
478 | const char *hid = acpi_device_hid(device); |
479 | char *name, *class; | |
1bce8113 | 480 | int error; |
1da177e4 | 481 | |
9e811e19 HG |
482 | if (!strcmp(hid, ACPI_BUTTON_HID_LID) && dmi_check_system(lid_blacklst)) |
483 | return -ENODEV; | |
484 | ||
c0968f0e | 485 | button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); |
1da177e4 | 486 | if (!button) |
d550d98d | 487 | return -ENOMEM; |
1da177e4 | 488 | |
db89b4f0 | 489 | device->driver_data = button; |
1da177e4 | 490 | |
c0968f0e DT |
491 | button->input = input = input_allocate_device(); |
492 | if (!input) { | |
493 | error = -ENOMEM; | |
494 | goto err_free_button; | |
495 | } | |
496 | ||
bf04a772 BH |
497 | name = acpi_device_name(device); |
498 | class = acpi_device_class(device); | |
499 | ||
d68b597c BH |
500 | if (!strcmp(hid, ACPI_BUTTON_HID_POWER) || |
501 | !strcmp(hid, ACPI_BUTTON_HID_POWERF)) { | |
1da177e4 | 502 | button->type = ACPI_BUTTON_TYPE_POWER; |
bf04a772 BH |
503 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); |
504 | sprintf(class, "%s/%s", | |
1da177e4 | 505 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
d68b597c BH |
506 | } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) || |
507 | !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { | |
1da177e4 | 508 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
bf04a772 BH |
509 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); |
510 | sprintf(class, "%s/%s", | |
1da177e4 | 511 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
bf04a772 | 512 | } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { |
1da177e4 | 513 | button->type = ACPI_BUTTON_TYPE_LID; |
bf04a772 BH |
514 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); |
515 | sprintf(class, "%s/%s", | |
1da177e4 | 516 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
84d3f6b7 | 517 | input->open = acpi_lid_input_open; |
4be44fcd | 518 | } else { |
bf04a772 | 519 | printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid); |
c0968f0e DT |
520 | error = -ENODEV; |
521 | goto err_free_input; | |
1da177e4 LT |
522 | } |
523 | ||
c0968f0e DT |
524 | error = acpi_button_add_fs(device); |
525 | if (error) | |
526 | goto err_free_input; | |
527 | ||
bf04a772 | 528 | snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); |
c0968f0e | 529 | |
bf04a772 | 530 | input->name = name; |
c0968f0e DT |
531 | input->phys = button->phys; |
532 | input->id.bustype = BUS_HOST; | |
533 | input->id.product = button->type; | |
3b34e523 | 534 | input->dev.parent = &device->dev; |
b34a8030 | 535 | |
1da177e4 | 536 | switch (button->type) { |
c0968f0e | 537 | case ACPI_BUTTON_TYPE_POWER: |
763f527b | 538 | input_set_capability(input, EV_KEY, KEY_POWER); |
1da177e4 | 539 | break; |
c0968f0e DT |
540 | |
541 | case ACPI_BUTTON_TYPE_SLEEP: | |
763f527b | 542 | input_set_capability(input, EV_KEY, KEY_SLEEP); |
1da177e4 | 543 | break; |
c0968f0e DT |
544 | |
545 | case ACPI_BUTTON_TYPE_LID: | |
763f527b | 546 | input_set_capability(input, EV_SW, SW_LID); |
1da177e4 LT |
547 | break; |
548 | } | |
549 | ||
84d3f6b7 | 550 | input_set_drvdata(input, device); |
c0968f0e DT |
551 | error = input_register_device(input); |
552 | if (error) | |
373cfc36 | 553 | goto err_remove_fs; |
7e12715e | 554 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
7e12715e JB |
555 | /* |
556 | * This assumes there's only one lid device, or if there are | |
557 | * more we only care about the last one... | |
558 | */ | |
559 | lid_device = device; | |
560 | } | |
1da177e4 | 561 | |
33e4f80e | 562 | device_init_wakeup(&device->dev, true); |
bf04a772 | 563 | printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device)); |
c0968f0e | 564 | return 0; |
1da177e4 | 565 | |
c0968f0e DT |
566 | err_remove_fs: |
567 | acpi_button_remove_fs(device); | |
568 | err_free_input: | |
569 | input_free_device(input); | |
570 | err_free_button: | |
571 | kfree(button); | |
572 | return error; | |
1da177e4 LT |
573 | } |
574 | ||
51fac838 | 575 | static int acpi_button_remove(struct acpi_device *device) |
1da177e4 | 576 | { |
1bce8113 | 577 | struct acpi_button *button = acpi_driver_data(device); |
1da177e4 | 578 | |
4be44fcd | 579 | acpi_button_remove_fs(device); |
c0968f0e | 580 | input_unregister_device(button->input); |
1da177e4 | 581 | kfree(button); |
d550d98d | 582 | return 0; |
1da177e4 LT |
583 | } |
584 | ||
e4dca7b7 KC |
585 | static int param_set_lid_init_state(const char *val, |
586 | const struct kernel_param *kp) | |
3540c32a LZ |
587 | { |
588 | int result = 0; | |
589 | ||
590 | if (!strncmp(val, "open", sizeof("open") - 1)) { | |
591 | lid_init_state = ACPI_BUTTON_LID_INIT_OPEN; | |
592 | pr_info("Notify initial lid state as open\n"); | |
f369fdf4 LZ |
593 | } else if (!strncmp(val, "method", sizeof("method") - 1)) { |
594 | lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; | |
595 | pr_info("Notify initial lid state with _LID return value\n"); | |
3540c32a LZ |
596 | } else if (!strncmp(val, "ignore", sizeof("ignore") - 1)) { |
597 | lid_init_state = ACPI_BUTTON_LID_INIT_IGNORE; | |
598 | pr_info("Do not notify initial lid state\n"); | |
599 | } else | |
600 | result = -EINVAL; | |
601 | return result; | |
602 | } | |
603 | ||
e4dca7b7 KC |
604 | static int param_get_lid_init_state(char *buffer, |
605 | const struct kernel_param *kp) | |
3540c32a LZ |
606 | { |
607 | switch (lid_init_state) { | |
608 | case ACPI_BUTTON_LID_INIT_OPEN: | |
609 | return sprintf(buffer, "open"); | |
f369fdf4 LZ |
610 | case ACPI_BUTTON_LID_INIT_METHOD: |
611 | return sprintf(buffer, "method"); | |
3540c32a LZ |
612 | case ACPI_BUTTON_LID_INIT_IGNORE: |
613 | return sprintf(buffer, "ignore"); | |
614 | default: | |
615 | return sprintf(buffer, "invalid"); | |
616 | } | |
617 | return 0; | |
618 | } | |
619 | ||
620 | module_param_call(lid_init_state, | |
621 | param_set_lid_init_state, param_get_lid_init_state, | |
622 | NULL, 0644); | |
623 | MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state"); | |
624 | ||
ac1e55b1 AB |
625 | static int acpi_button_register_driver(struct acpi_driver *driver) |
626 | { | |
627 | /* | |
628 | * Modules such as nouveau.ko and i915.ko have a link time dependency | |
629 | * on acpi_lid_open(), and would therefore not be loadable on ACPI | |
630 | * capable kernels booted in non-ACPI mode if the return value of | |
631 | * acpi_bus_register_driver() is returned from here with ACPI disabled | |
632 | * when this driver is built as a module. | |
633 | */ | |
634 | if (acpi_disabled) | |
635 | return 0; | |
636 | ||
637 | return acpi_bus_register_driver(driver); | |
638 | } | |
639 | ||
640 | static void acpi_button_unregister_driver(struct acpi_driver *driver) | |
641 | { | |
642 | if (!acpi_disabled) | |
643 | acpi_bus_unregister_driver(driver); | |
644 | } | |
645 | ||
646 | module_driver(acpi_button_driver, acpi_button_register_driver, | |
647 | acpi_button_unregister_driver); |