Commit | Line | Data |
---|---|---|
c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
50a4da89 | 3 | * button.c - ACPI Button Driver |
1da177e4 LT |
4 | * |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
1da177e4 LT |
7 | */ |
8 | ||
b6aeab44 | 9 | #define pr_fmt(fmt) "ACPI: button: " fmt |
dfa46c50 | 10 | |
2c4c2a71 | 11 | #include <linux/compiler.h> |
1da177e4 LT |
12 | #include <linux/kernel.h> |
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
b34a8030 AS |
15 | #include <linux/types.h> |
16 | #include <linux/proc_fs.h> | |
17 | #include <linux/seq_file.h> | |
c0968f0e | 18 | #include <linux/input.h> |
5a0e3ad6 | 19 | #include <linux/slab.h> |
8b48463f | 20 | #include <linux/acpi.h> |
9e811e19 | 21 | #include <linux/dmi.h> |
6270da6f | 22 | #include <acpi/button.h> |
1da177e4 | 23 | |
a192a958 LB |
24 | #define PREFIX "ACPI: " |
25 | ||
1da177e4 | 26 | #define ACPI_BUTTON_CLASS "button" |
b34a8030 AS |
27 | #define ACPI_BUTTON_FILE_INFO "info" |
28 | #define ACPI_BUTTON_FILE_STATE "state" | |
29 | #define ACPI_BUTTON_TYPE_UNKNOWN 0x00 | |
1da177e4 LT |
30 | #define ACPI_BUTTON_NOTIFY_STATUS 0x80 |
31 | ||
32 | #define ACPI_BUTTON_SUBCLASS_POWER "power" | |
4be44fcd | 33 | #define ACPI_BUTTON_HID_POWER "PNP0C0C" |
d68b597c | 34 | #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button" |
1da177e4 | 35 | #define ACPI_BUTTON_TYPE_POWER 0x01 |
1da177e4 LT |
36 | |
37 | #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" | |
38 | #define ACPI_BUTTON_HID_SLEEP "PNP0C0E" | |
d68b597c | 39 | #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button" |
1da177e4 | 40 | #define ACPI_BUTTON_TYPE_SLEEP 0x03 |
1da177e4 LT |
41 | |
42 | #define ACPI_BUTTON_SUBCLASS_LID "lid" | |
43 | #define ACPI_BUTTON_HID_LID "PNP0C0D" | |
44 | #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" | |
45 | #define ACPI_BUTTON_TYPE_LID 0x05 | |
46 | ||
3540c32a LZ |
47 | #define ACPI_BUTTON_LID_INIT_IGNORE 0x00 |
48 | #define ACPI_BUTTON_LID_INIT_OPEN 0x01 | |
f369fdf4 | 49 | #define ACPI_BUTTON_LID_INIT_METHOD 0x02 |
3540c32a | 50 | |
1da177e4 | 51 | #define _COMPONENT ACPI_BUTTON_COMPONENT |
f52fd66d | 52 | ACPI_MODULE_NAME("button"); |
1da177e4 | 53 | |
c0968f0e | 54 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 55 | MODULE_DESCRIPTION("ACPI Button Driver"); |
1da177e4 LT |
56 | MODULE_LICENSE("GPL"); |
57 | ||
1ba90e3a TR |
58 | static const struct acpi_device_id button_device_ids[] = { |
59 | {ACPI_BUTTON_HID_LID, 0}, | |
60 | {ACPI_BUTTON_HID_SLEEP, 0}, | |
61 | {ACPI_BUTTON_HID_SLEEPF, 0}, | |
62 | {ACPI_BUTTON_HID_POWER, 0}, | |
63 | {ACPI_BUTTON_HID_POWERF, 0}, | |
64 | {"", 0}, | |
65 | }; | |
66 | MODULE_DEVICE_TABLE(acpi, button_device_ids); | |
67 | ||
9e811e19 HG |
68 | /* |
69 | * Some devices which don't even have a lid in anyway have a broken _LID | |
70 | * method (e.g. pointing to a floating gpio pin) causing spurious LID events. | |
71 | */ | |
72 | static const struct dmi_system_id lid_blacklst[] = { | |
73 | { | |
74 | /* GP-electronic T701 */ | |
75 | .matches = { | |
76 | DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), | |
77 | DMI_MATCH(DMI_PRODUCT_NAME, "T701"), | |
78 | DMI_MATCH(DMI_BIOS_VERSION, "BYT70A.YNCHENG.WIN.007"), | |
79 | }, | |
80 | }, | |
81 | {} | |
82 | }; | |
83 | ||
4be44fcd | 84 | static int acpi_button_add(struct acpi_device *device); |
51fac838 | 85 | static int acpi_button_remove(struct acpi_device *device); |
373cfc36 | 86 | static void acpi_button_notify(struct acpi_device *device, u32 event); |
1da177e4 | 87 | |
90692404 | 88 | #ifdef CONFIG_PM_SLEEP |
e71eeb2a | 89 | static int acpi_button_suspend(struct device *dev); |
1be532de | 90 | static int acpi_button_resume(struct device *dev); |
2de9fd17 | 91 | #else |
e71eeb2a | 92 | #define acpi_button_suspend NULL |
2de9fd17 | 93 | #define acpi_button_resume NULL |
90692404 | 94 | #endif |
e71eeb2a | 95 | static SIMPLE_DEV_PM_OPS(acpi_button_pm, acpi_button_suspend, acpi_button_resume); |
1be532de | 96 | |
1da177e4 | 97 | static struct acpi_driver acpi_button_driver = { |
c2b6705b | 98 | .name = "button", |
4be44fcd | 99 | .class = ACPI_BUTTON_CLASS, |
1ba90e3a | 100 | .ids = button_device_ids, |
4be44fcd LB |
101 | .ops = { |
102 | .add = acpi_button_add, | |
103 | .remove = acpi_button_remove, | |
373cfc36 | 104 | .notify = acpi_button_notify, |
c0968f0e | 105 | }, |
1be532de | 106 | .drv.pm = &acpi_button_pm, |
1da177e4 LT |
107 | }; |
108 | ||
109 | struct acpi_button { | |
c0968f0e DT |
110 | unsigned int type; |
111 | struct input_dev *input; | |
112 | char phys[32]; /* for input device */ | |
4be44fcd | 113 | unsigned long pushed; |
dfa46c50 LZ |
114 | int last_state; |
115 | ktime_t last_time; | |
e71eeb2a | 116 | bool suspended; |
1da177e4 LT |
117 | }; |
118 | ||
7e12715e JB |
119 | static BLOCKING_NOTIFIER_HEAD(acpi_lid_notifier); |
120 | static struct acpi_device *lid_device; | |
878d8db0 | 121 | static u8 lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; |
7e12715e | 122 | |
dfa46c50 LZ |
123 | static unsigned long lid_report_interval __read_mostly = 500; |
124 | module_param(lid_report_interval, ulong, 0644); | |
125 | MODULE_PARM_DESC(lid_report_interval, "Interval (ms) between lid key events"); | |
126 | ||
b34a8030 AS |
127 | /* -------------------------------------------------------------------------- |
128 | FS Interface (/proc) | |
129 | -------------------------------------------------------------------------- */ | |
130 | ||
4be44fcd | 131 | static struct proc_dir_entry *acpi_button_dir; |
912b7427 | 132 | static struct proc_dir_entry *acpi_lid_dir; |
4be44fcd | 133 | |
ee7e2265 LZ |
134 | static int acpi_lid_evaluate_state(struct acpi_device *device) |
135 | { | |
136 | unsigned long long lid_state; | |
137 | acpi_status status; | |
138 | ||
139 | status = acpi_evaluate_integer(device->handle, "_LID", NULL, &lid_state); | |
140 | if (ACPI_FAILURE(status)) | |
141 | return -ENODEV; | |
142 | ||
143 | return lid_state ? 1 : 0; | |
144 | } | |
145 | ||
146 | static int acpi_lid_notify_state(struct acpi_device *device, int state) | |
147 | { | |
148 | struct acpi_button *button = acpi_driver_data(device); | |
149 | int ret; | |
dfa46c50 LZ |
150 | ktime_t next_report; |
151 | bool do_update; | |
152 | ||
153 | /* | |
154 | * In lid_init_state=ignore mode, if user opens/closes lid | |
155 | * frequently with "open" missing, and "last_time" is also updated | |
156 | * frequently, "close" cannot be delivered to the userspace. | |
157 | * So "last_time" is only updated after a timeout or an actual | |
158 | * switch. | |
159 | */ | |
160 | if (lid_init_state != ACPI_BUTTON_LID_INIT_IGNORE || | |
161 | button->last_state != !!state) | |
162 | do_update = true; | |
163 | else | |
164 | do_update = false; | |
165 | ||
166 | next_report = ktime_add(button->last_time, | |
167 | ms_to_ktime(lid_report_interval)); | |
168 | if (button->last_state == !!state && | |
169 | ktime_after(ktime_get(), next_report)) { | |
170 | /* Complain the buggy firmware */ | |
171 | pr_warn_once("The lid device is not compliant to SW_LID.\n"); | |
ee7e2265 | 172 | |
dfa46c50 LZ |
173 | /* |
174 | * Send the unreliable complement switch event: | |
175 | * | |
176 | * On most platforms, the lid device is reliable. However | |
177 | * there are exceptions: | |
178 | * 1. Platforms returning initial lid state as "close" by | |
179 | * default after booting/resuming: | |
180 | * https://bugzilla.kernel.org/show_bug.cgi?id=89211 | |
181 | * https://bugzilla.kernel.org/show_bug.cgi?id=106151 | |
182 | * 2. Platforms never reporting "open" events: | |
183 | * https://bugzilla.kernel.org/show_bug.cgi?id=106941 | |
184 | * On these buggy platforms, the usage model of the ACPI | |
185 | * lid device actually is: | |
186 | * 1. The initial returning value of _LID may not be | |
187 | * reliable. | |
188 | * 2. The open event may not be reliable. | |
189 | * 3. The close event is reliable. | |
190 | * | |
191 | * But SW_LID is typed as input switch event, the input | |
192 | * layer checks if the event is redundant. Hence if the | |
193 | * state is not switched, the userspace cannot see this | |
194 | * platform triggered reliable event. By inserting a | |
195 | * complement switch event, it then is guaranteed that the | |
196 | * platform triggered reliable one can always be seen by | |
197 | * the userspace. | |
198 | */ | |
199 | if (lid_init_state == ACPI_BUTTON_LID_INIT_IGNORE) { | |
200 | do_update = true; | |
201 | /* | |
202 | * Do generate complement switch event for "close" | |
203 | * as "close" is reliable and wrong "open" won't | |
204 | * trigger unexpected behaviors. | |
205 | * Do not generate complement switch event for | |
206 | * "open" as "open" is not reliable and wrong | |
207 | * "close" will trigger unexpected behaviors. | |
208 | */ | |
209 | if (!state) { | |
210 | input_report_switch(button->input, | |
211 | SW_LID, state); | |
212 | input_sync(button->input); | |
213 | } | |
214 | } | |
215 | } | |
216 | /* Send the platform triggered reliable event */ | |
217 | if (do_update) { | |
ae35d656 HG |
218 | acpi_handle_debug(device->handle, "ACPI LID %s\n", |
219 | state ? "open" : "closed"); | |
dfa46c50 LZ |
220 | input_report_switch(button->input, SW_LID, !state); |
221 | input_sync(button->input); | |
222 | button->last_state = !!state; | |
223 | button->last_time = ktime_get(); | |
224 | } | |
ee7e2265 | 225 | |
ee7e2265 LZ |
226 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device); |
227 | if (ret == NOTIFY_DONE) | |
228 | ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, | |
229 | device); | |
230 | if (ret == NOTIFY_DONE || ret == NOTIFY_OK) { | |
231 | /* | |
232 | * It is also regarded as success if the notifier_chain | |
233 | * returns NOTIFY_OK or NOTIFY_DONE. | |
234 | */ | |
235 | ret = 0; | |
236 | } | |
237 | return ret; | |
238 | } | |
239 | ||
2c4c2a71 RD |
240 | static int __maybe_unused acpi_button_state_seq_show(struct seq_file *seq, |
241 | void *offset) | |
b34a8030 | 242 | { |
106c19e7 | 243 | struct acpi_device *device = seq->private; |
ee7e2265 | 244 | int state; |
b34a8030 | 245 | |
ee7e2265 | 246 | state = acpi_lid_evaluate_state(device); |
c0968f0e | 247 | seq_printf(seq, "state: %s\n", |
ee7e2265 | 248 | state < 0 ? "unsupported" : (state ? "open" : "closed")); |
d550d98d | 249 | return 0; |
b34a8030 AS |
250 | } |
251 | ||
4be44fcd | 252 | static int acpi_button_add_fs(struct acpi_device *device) |
b34a8030 | 253 | { |
1bce8113 | 254 | struct acpi_button *button = acpi_driver_data(device); |
4be44fcd | 255 | struct proc_dir_entry *entry = NULL; |
912b7427 | 256 | int ret = 0; |
b34a8030 | 257 | |
912b7427 ZR |
258 | /* procfs I/F for ACPI lid device only */ |
259 | if (button->type != ACPI_BUTTON_TYPE_LID) | |
260 | return 0; | |
261 | ||
262 | if (acpi_button_dir || acpi_lid_dir) { | |
263 | printk(KERN_ERR PREFIX "More than one Lid device found!\n"); | |
264 | return -EEXIST; | |
b34a8030 AS |
265 | } |
266 | ||
912b7427 ZR |
267 | /* create /proc/acpi/button */ |
268 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); | |
269 | if (!acpi_button_dir) | |
d550d98d | 270 | return -ENODEV; |
b34a8030 | 271 | |
912b7427 ZR |
272 | /* create /proc/acpi/button/lid */ |
273 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
274 | if (!acpi_lid_dir) { | |
275 | ret = -ENODEV; | |
276 | goto remove_button_dir; | |
277 | } | |
b34a8030 | 278 | |
912b7427 ZR |
279 | /* create /proc/acpi/button/lid/LID/ */ |
280 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir); | |
281 | if (!acpi_device_dir(device)) { | |
282 | ret = -ENODEV; | |
283 | goto remove_lid_dir; | |
284 | } | |
b34a8030 | 285 | |
912b7427 | 286 | /* create /proc/acpi/button/lid/LID/state */ |
3f3942ac CH |
287 | entry = proc_create_single_data(ACPI_BUTTON_FILE_STATE, S_IRUGO, |
288 | acpi_device_dir(device), acpi_button_state_seq_show, | |
289 | device); | |
912b7427 ZR |
290 | if (!entry) { |
291 | ret = -ENODEV; | |
292 | goto remove_dev_dir; | |
b34a8030 AS |
293 | } |
294 | ||
912b7427 ZR |
295 | done: |
296 | return ret; | |
297 | ||
298 | remove_dev_dir: | |
299 | remove_proc_entry(acpi_device_bid(device), | |
300 | acpi_lid_dir); | |
301 | acpi_device_dir(device) = NULL; | |
302 | remove_lid_dir: | |
303 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
e370cc86 | 304 | acpi_lid_dir = NULL; |
912b7427 ZR |
305 | remove_button_dir: |
306 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
e370cc86 | 307 | acpi_button_dir = NULL; |
912b7427 | 308 | goto done; |
b34a8030 AS |
309 | } |
310 | ||
4be44fcd | 311 | static int acpi_button_remove_fs(struct acpi_device *device) |
b34a8030 | 312 | { |
c0968f0e | 313 | struct acpi_button *button = acpi_driver_data(device); |
b34a8030 | 314 | |
912b7427 ZR |
315 | if (button->type != ACPI_BUTTON_TYPE_LID) |
316 | return 0; | |
b34a8030 | 317 | |
912b7427 ZR |
318 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, |
319 | acpi_device_dir(device)); | |
320 | remove_proc_entry(acpi_device_bid(device), | |
321 | acpi_lid_dir); | |
322 | acpi_device_dir(device) = NULL; | |
323 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
e370cc86 | 324 | acpi_lid_dir = NULL; |
912b7427 | 325 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
e370cc86 | 326 | acpi_button_dir = NULL; |
b34a8030 | 327 | |
d550d98d | 328 | return 0; |
b34a8030 AS |
329 | } |
330 | ||
1da177e4 LT |
331 | /* -------------------------------------------------------------------------- |
332 | Driver Interface | |
333 | -------------------------------------------------------------------------- */ | |
7e12715e JB |
334 | int acpi_lid_notifier_register(struct notifier_block *nb) |
335 | { | |
336 | return blocking_notifier_chain_register(&acpi_lid_notifier, nb); | |
337 | } | |
338 | EXPORT_SYMBOL(acpi_lid_notifier_register); | |
339 | ||
340 | int acpi_lid_notifier_unregister(struct notifier_block *nb) | |
341 | { | |
342 | return blocking_notifier_chain_unregister(&acpi_lid_notifier, nb); | |
343 | } | |
344 | EXPORT_SYMBOL(acpi_lid_notifier_unregister); | |
345 | ||
346 | int acpi_lid_open(void) | |
347 | { | |
2c907b72 JB |
348 | if (!lid_device) |
349 | return -ENODEV; | |
350 | ||
ee7e2265 | 351 | return acpi_lid_evaluate_state(lid_device); |
7e12715e JB |
352 | } |
353 | EXPORT_SYMBOL(acpi_lid_open); | |
354 | ||
7c058c7c RCS |
355 | static int acpi_lid_update_state(struct acpi_device *device, |
356 | bool signal_wakeup) | |
23de5d9e | 357 | { |
ee7e2265 | 358 | int state; |
50a4da89 | 359 | |
ee7e2265 LZ |
360 | state = acpi_lid_evaluate_state(device); |
361 | if (state < 0) | |
362 | return state; | |
7e12715e | 363 | |
7c058c7c RCS |
364 | if (state && signal_wakeup) |
365 | acpi_pm_wakeup_event(&device->dev); | |
366 | ||
ee7e2265 | 367 | return acpi_lid_notify_state(device, state); |
23de5d9e | 368 | } |
1da177e4 | 369 | |
3540c32a LZ |
370 | static void acpi_lid_initialize_state(struct acpi_device *device) |
371 | { | |
372 | switch (lid_init_state) { | |
373 | case ACPI_BUTTON_LID_INIT_OPEN: | |
374 | (void)acpi_lid_notify_state(device, 1); | |
375 | break; | |
f369fdf4 | 376 | case ACPI_BUTTON_LID_INIT_METHOD: |
7c058c7c | 377 | (void)acpi_lid_update_state(device, false); |
f369fdf4 | 378 | break; |
3540c32a LZ |
379 | case ACPI_BUTTON_LID_INIT_IGNORE: |
380 | default: | |
381 | break; | |
382 | } | |
383 | } | |
384 | ||
373cfc36 | 385 | static void acpi_button_notify(struct acpi_device *device, u32 event) |
1da177e4 | 386 | { |
373cfc36 | 387 | struct acpi_button *button = acpi_driver_data(device); |
c0968f0e | 388 | struct input_dev *input; |
84d3f6b7 | 389 | int users; |
1da177e4 | 390 | |
1da177e4 | 391 | switch (event) { |
373cfc36 BH |
392 | case ACPI_FIXED_HARDWARE_EVENT: |
393 | event = ACPI_BUTTON_NOTIFY_STATUS; | |
394 | /* fall through */ | |
1da177e4 | 395 | case ACPI_BUTTON_NOTIFY_STATUS: |
c0968f0e | 396 | input = button->input; |
c0968f0e | 397 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
84d3f6b7 HG |
398 | mutex_lock(&button->input->mutex); |
399 | users = button->input->users; | |
400 | mutex_unlock(&button->input->mutex); | |
401 | if (users) | |
7c058c7c | 402 | acpi_lid_update_state(device, true); |
c0968f0e | 403 | } else { |
e71eeb2a RW |
404 | int keycode; |
405 | ||
33e4f80e | 406 | acpi_pm_wakeup_event(&device->dev); |
e71eeb2a RW |
407 | if (button->suspended) |
408 | break; | |
c0968f0e | 409 | |
e71eeb2a RW |
410 | keycode = test_bit(KEY_SLEEP, input->keybit) ? |
411 | KEY_SLEEP : KEY_POWER; | |
c0968f0e DT |
412 | input_report_key(input, keycode, 1); |
413 | input_sync(input); | |
414 | input_report_key(input, keycode, 0); | |
df316e93 | 415 | input_sync(input); |
1f83511b | 416 | |
0bf6368e LT |
417 | acpi_bus_generate_netlink_event( |
418 | device->pnp.device_class, | |
419 | dev_name(&device->dev), | |
420 | event, ++button->pushed); | |
c0968f0e | 421 | } |
1da177e4 LT |
422 | break; |
423 | default: | |
424 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 425 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
426 | break; |
427 | } | |
1da177e4 LT |
428 | } |
429 | ||
90692404 | 430 | #ifdef CONFIG_PM_SLEEP |
e71eeb2a RW |
431 | static int acpi_button_suspend(struct device *dev) |
432 | { | |
433 | struct acpi_device *device = to_acpi_device(dev); | |
434 | struct acpi_button *button = acpi_driver_data(device); | |
435 | ||
436 | button->suspended = true; | |
437 | return 0; | |
438 | } | |
439 | ||
1be532de | 440 | static int acpi_button_resume(struct device *dev) |
23de5d9e | 441 | { |
1be532de | 442 | struct acpi_device *device = to_acpi_device(dev); |
1bce8113 | 443 | struct acpi_button *button = acpi_driver_data(device); |
50a4da89 | 444 | |
e71eeb2a | 445 | button->suspended = false; |
13e96214 ZR |
446 | if (button->type == ACPI_BUTTON_TYPE_LID && button->input->users) { |
447 | button->last_state = !!acpi_lid_evaluate_state(device); | |
448 | button->last_time = ktime_get(); | |
3540c32a | 449 | acpi_lid_initialize_state(device); |
13e96214 | 450 | } |
23de5d9e AS |
451 | return 0; |
452 | } | |
90692404 | 453 | #endif |
23de5d9e | 454 | |
84d3f6b7 HG |
455 | static int acpi_lid_input_open(struct input_dev *input) |
456 | { | |
457 | struct acpi_device *device = input_get_drvdata(input); | |
458 | struct acpi_button *button = acpi_driver_data(device); | |
459 | ||
460 | button->last_state = !!acpi_lid_evaluate_state(device); | |
461 | button->last_time = ktime_get(); | |
462 | acpi_lid_initialize_state(device); | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
c0968f0e DT |
467 | static int acpi_button_add(struct acpi_device *device) |
468 | { | |
c0968f0e DT |
469 | struct acpi_button *button; |
470 | struct input_dev *input; | |
620e112c TR |
471 | const char *hid = acpi_device_hid(device); |
472 | char *name, *class; | |
1bce8113 | 473 | int error; |
1da177e4 | 474 | |
9e811e19 HG |
475 | if (!strcmp(hid, ACPI_BUTTON_HID_LID) && dmi_check_system(lid_blacklst)) |
476 | return -ENODEV; | |
477 | ||
c0968f0e | 478 | button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); |
1da177e4 | 479 | if (!button) |
d550d98d | 480 | return -ENOMEM; |
1da177e4 | 481 | |
db89b4f0 | 482 | device->driver_data = button; |
1da177e4 | 483 | |
c0968f0e DT |
484 | button->input = input = input_allocate_device(); |
485 | if (!input) { | |
486 | error = -ENOMEM; | |
487 | goto err_free_button; | |
488 | } | |
489 | ||
bf04a772 BH |
490 | name = acpi_device_name(device); |
491 | class = acpi_device_class(device); | |
492 | ||
d68b597c BH |
493 | if (!strcmp(hid, ACPI_BUTTON_HID_POWER) || |
494 | !strcmp(hid, ACPI_BUTTON_HID_POWERF)) { | |
1da177e4 | 495 | button->type = ACPI_BUTTON_TYPE_POWER; |
bf04a772 BH |
496 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); |
497 | sprintf(class, "%s/%s", | |
1da177e4 | 498 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
d68b597c BH |
499 | } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) || |
500 | !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { | |
1da177e4 | 501 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
bf04a772 BH |
502 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); |
503 | sprintf(class, "%s/%s", | |
1da177e4 | 504 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
bf04a772 | 505 | } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { |
1da177e4 | 506 | button->type = ACPI_BUTTON_TYPE_LID; |
bf04a772 BH |
507 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); |
508 | sprintf(class, "%s/%s", | |
1da177e4 | 509 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
84d3f6b7 | 510 | input->open = acpi_lid_input_open; |
4be44fcd | 511 | } else { |
bf04a772 | 512 | printk(KERN_ERR PREFIX "Unsupported hid [%s]\n", hid); |
c0968f0e DT |
513 | error = -ENODEV; |
514 | goto err_free_input; | |
1da177e4 LT |
515 | } |
516 | ||
c0968f0e DT |
517 | error = acpi_button_add_fs(device); |
518 | if (error) | |
519 | goto err_free_input; | |
520 | ||
bf04a772 | 521 | snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); |
c0968f0e | 522 | |
bf04a772 | 523 | input->name = name; |
c0968f0e DT |
524 | input->phys = button->phys; |
525 | input->id.bustype = BUS_HOST; | |
526 | input->id.product = button->type; | |
3b34e523 | 527 | input->dev.parent = &device->dev; |
b34a8030 | 528 | |
1da177e4 | 529 | switch (button->type) { |
c0968f0e | 530 | case ACPI_BUTTON_TYPE_POWER: |
763f527b | 531 | input_set_capability(input, EV_KEY, KEY_POWER); |
1da177e4 | 532 | break; |
c0968f0e DT |
533 | |
534 | case ACPI_BUTTON_TYPE_SLEEP: | |
763f527b | 535 | input_set_capability(input, EV_KEY, KEY_SLEEP); |
1da177e4 | 536 | break; |
c0968f0e DT |
537 | |
538 | case ACPI_BUTTON_TYPE_LID: | |
763f527b | 539 | input_set_capability(input, EV_SW, SW_LID); |
1da177e4 LT |
540 | break; |
541 | } | |
542 | ||
84d3f6b7 | 543 | input_set_drvdata(input, device); |
c0968f0e DT |
544 | error = input_register_device(input); |
545 | if (error) | |
373cfc36 | 546 | goto err_remove_fs; |
7e12715e | 547 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
7e12715e JB |
548 | /* |
549 | * This assumes there's only one lid device, or if there are | |
550 | * more we only care about the last one... | |
551 | */ | |
552 | lid_device = device; | |
553 | } | |
1da177e4 | 554 | |
33e4f80e | 555 | device_init_wakeup(&device->dev, true); |
bf04a772 | 556 | printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device)); |
c0968f0e | 557 | return 0; |
1da177e4 | 558 | |
c0968f0e DT |
559 | err_remove_fs: |
560 | acpi_button_remove_fs(device); | |
561 | err_free_input: | |
562 | input_free_device(input); | |
563 | err_free_button: | |
564 | kfree(button); | |
565 | return error; | |
1da177e4 LT |
566 | } |
567 | ||
51fac838 | 568 | static int acpi_button_remove(struct acpi_device *device) |
1da177e4 | 569 | { |
1bce8113 | 570 | struct acpi_button *button = acpi_driver_data(device); |
1da177e4 | 571 | |
4be44fcd | 572 | acpi_button_remove_fs(device); |
c0968f0e | 573 | input_unregister_device(button->input); |
1da177e4 | 574 | kfree(button); |
d550d98d | 575 | return 0; |
1da177e4 LT |
576 | } |
577 | ||
e4dca7b7 KC |
578 | static int param_set_lid_init_state(const char *val, |
579 | const struct kernel_param *kp) | |
3540c32a LZ |
580 | { |
581 | int result = 0; | |
582 | ||
583 | if (!strncmp(val, "open", sizeof("open") - 1)) { | |
584 | lid_init_state = ACPI_BUTTON_LID_INIT_OPEN; | |
585 | pr_info("Notify initial lid state as open\n"); | |
f369fdf4 LZ |
586 | } else if (!strncmp(val, "method", sizeof("method") - 1)) { |
587 | lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; | |
588 | pr_info("Notify initial lid state with _LID return value\n"); | |
3540c32a LZ |
589 | } else if (!strncmp(val, "ignore", sizeof("ignore") - 1)) { |
590 | lid_init_state = ACPI_BUTTON_LID_INIT_IGNORE; | |
591 | pr_info("Do not notify initial lid state\n"); | |
592 | } else | |
593 | result = -EINVAL; | |
594 | return result; | |
595 | } | |
596 | ||
e4dca7b7 KC |
597 | static int param_get_lid_init_state(char *buffer, |
598 | const struct kernel_param *kp) | |
3540c32a LZ |
599 | { |
600 | switch (lid_init_state) { | |
601 | case ACPI_BUTTON_LID_INIT_OPEN: | |
602 | return sprintf(buffer, "open"); | |
f369fdf4 LZ |
603 | case ACPI_BUTTON_LID_INIT_METHOD: |
604 | return sprintf(buffer, "method"); | |
3540c32a LZ |
605 | case ACPI_BUTTON_LID_INIT_IGNORE: |
606 | return sprintf(buffer, "ignore"); | |
607 | default: | |
608 | return sprintf(buffer, "invalid"); | |
609 | } | |
610 | return 0; | |
611 | } | |
612 | ||
613 | module_param_call(lid_init_state, | |
614 | param_set_lid_init_state, param_get_lid_init_state, | |
615 | NULL, 0644); | |
616 | MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state"); | |
617 | ||
ac1e55b1 AB |
618 | static int acpi_button_register_driver(struct acpi_driver *driver) |
619 | { | |
620 | /* | |
621 | * Modules such as nouveau.ko and i915.ko have a link time dependency | |
622 | * on acpi_lid_open(), and would therefore not be loadable on ACPI | |
623 | * capable kernels booted in non-ACPI mode if the return value of | |
624 | * acpi_bus_register_driver() is returned from here with ACPI disabled | |
625 | * when this driver is built as a module. | |
626 | */ | |
627 | if (acpi_disabled) | |
628 | return 0; | |
629 | ||
630 | return acpi_bus_register_driver(driver); | |
631 | } | |
632 | ||
633 | static void acpi_button_unregister_driver(struct acpi_driver *driver) | |
634 | { | |
635 | if (!acpi_disabled) | |
636 | acpi_bus_unregister_driver(driver); | |
637 | } | |
638 | ||
639 | module_driver(acpi_button_driver, acpi_button_register_driver, | |
640 | acpi_button_unregister_driver); |