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 | |
1da177e4 | 24 | #define ACPI_BUTTON_CLASS "button" |
b34a8030 AS |
25 | #define ACPI_BUTTON_FILE_STATE "state" |
26 | #define ACPI_BUTTON_TYPE_UNKNOWN 0x00 | |
1da177e4 LT |
27 | #define ACPI_BUTTON_NOTIFY_STATUS 0x80 |
28 | ||
29 | #define ACPI_BUTTON_SUBCLASS_POWER "power" | |
d68b597c | 30 | #define ACPI_BUTTON_DEVICE_NAME_POWER "Power Button" |
1da177e4 | 31 | #define ACPI_BUTTON_TYPE_POWER 0x01 |
1da177e4 LT |
32 | |
33 | #define ACPI_BUTTON_SUBCLASS_SLEEP "sleep" | |
d68b597c | 34 | #define ACPI_BUTTON_DEVICE_NAME_SLEEP "Sleep Button" |
1da177e4 | 35 | #define ACPI_BUTTON_TYPE_SLEEP 0x03 |
1da177e4 LT |
36 | |
37 | #define ACPI_BUTTON_SUBCLASS_LID "lid" | |
1da177e4 LT |
38 | #define ACPI_BUTTON_DEVICE_NAME_LID "Lid Switch" |
39 | #define ACPI_BUTTON_TYPE_LID 0x05 | |
40 | ||
065bd4d3 HG |
41 | enum { |
42 | ACPI_BUTTON_LID_INIT_IGNORE, | |
43 | ACPI_BUTTON_LID_INIT_OPEN, | |
44 | ACPI_BUTTON_LID_INIT_METHOD, | |
593681e2 | 45 | ACPI_BUTTON_LID_INIT_DISABLED, |
065bd4d3 HG |
46 | }; |
47 | ||
48 | static const char * const lid_init_state_str[] = { | |
49 | [ACPI_BUTTON_LID_INIT_IGNORE] = "ignore", | |
50 | [ACPI_BUTTON_LID_INIT_OPEN] = "open", | |
51 | [ACPI_BUTTON_LID_INIT_METHOD] = "method", | |
593681e2 | 52 | [ACPI_BUTTON_LID_INIT_DISABLED] = "disabled", |
065bd4d3 | 53 | }; |
3540c32a | 54 | |
c0968f0e | 55 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 56 | MODULE_DESCRIPTION("ACPI Button Driver"); |
1da177e4 LT |
57 | MODULE_LICENSE("GPL"); |
58 | ||
1ba90e3a TR |
59 | static const struct acpi_device_id button_device_ids[] = { |
60 | {ACPI_BUTTON_HID_LID, 0}, | |
61 | {ACPI_BUTTON_HID_SLEEP, 0}, | |
62 | {ACPI_BUTTON_HID_SLEEPF, 0}, | |
63 | {ACPI_BUTTON_HID_POWER, 0}, | |
64 | {ACPI_BUTTON_HID_POWERF, 0}, | |
65 | {"", 0}, | |
66 | }; | |
67 | MODULE_DEVICE_TABLE(acpi, button_device_ids); | |
68 | ||
d7cd0823 HG |
69 | /* Please keep this list sorted alphabetically by vendor and model */ |
70 | static const struct dmi_system_id dmi_lid_quirks[] = { | |
9e811e19 | 71 | { |
d7cd0823 | 72 | /* GP-electronic T701, _LID method points to a floating GPIO */ |
9e811e19 HG |
73 | .matches = { |
74 | DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), | |
75 | DMI_MATCH(DMI_PRODUCT_NAME, "T701"), | |
76 | DMI_MATCH(DMI_BIOS_VERSION, "BYT70A.YNCHENG.WIN.007"), | |
77 | }, | |
d7cd0823 | 78 | .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_DISABLED, |
4fd55566 HG |
79 | }, |
80 | { | |
81 | /* Nextbook Ares 8A tablet, _LID device always reports lid closed */ | |
82 | .matches = { | |
83 | DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), | |
84 | DMI_MATCH(DMI_PRODUCT_NAME, "CherryTrail"), | |
85 | DMI_MATCH(DMI_BIOS_VERSION, "M882"), | |
86 | }, | |
87 | .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_DISABLED, | |
9e811e19 | 88 | }, |
1a20d409 UH |
89 | { |
90 | /* | |
91 | * Lenovo Yoga 9 14ITL5, initial notification of the LID device | |
92 | * never happens. | |
93 | */ | |
94 | .matches = { | |
95 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
96 | DMI_MATCH(DMI_PRODUCT_NAME, "82BG"), | |
97 | }, | |
98 | .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, | |
99 | }, | |
932e1ba4 HG |
100 | { |
101 | /* | |
102 | * Medion Akoya E2215T, notification of the LID device only | |
103 | * happens on close, not on open and _LID always returns closed. | |
104 | */ | |
105 | .matches = { | |
106 | DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), | |
7daaa063 HG |
107 | DMI_MATCH(DMI_PRODUCT_NAME, "E2215T"), |
108 | }, | |
109 | .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, | |
110 | }, | |
111 | { | |
112 | /* | |
113 | * Medion Akoya E2228T, notification of the LID device only | |
114 | * happens on close, not on open and _LID always returns closed. | |
115 | */ | |
116 | .matches = { | |
117 | DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), | |
118 | DMI_MATCH(DMI_PRODUCT_NAME, "E2228T"), | |
932e1ba4 HG |
119 | }, |
120 | .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, | |
121 | }, | |
05289049 JE |
122 | { |
123 | /* | |
124 | * Razer Blade Stealth 13 late 2019, notification of the LID device | |
125 | * only happens on close, not on open and _LID always returns closed. | |
126 | */ | |
127 | .matches = { | |
128 | DMI_MATCH(DMI_SYS_VENDOR, "Razer"), | |
129 | DMI_MATCH(DMI_PRODUCT_NAME, "Razer Blade Stealth 13 Late 2019"), | |
130 | }, | |
131 | .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, | |
132 | }, | |
9e811e19 HG |
133 | {} |
134 | }; | |
135 | ||
4be44fcd | 136 | static int acpi_button_add(struct acpi_device *device); |
6c0eb5ba | 137 | static void acpi_button_remove(struct acpi_device *device); |
1da177e4 | 138 | |
90692404 | 139 | #ifdef CONFIG_PM_SLEEP |
e71eeb2a | 140 | static int acpi_button_suspend(struct device *dev); |
1be532de | 141 | static int acpi_button_resume(struct device *dev); |
2de9fd17 | 142 | #else |
e71eeb2a | 143 | #define acpi_button_suspend NULL |
2de9fd17 | 144 | #define acpi_button_resume NULL |
90692404 | 145 | #endif |
e71eeb2a | 146 | static SIMPLE_DEV_PM_OPS(acpi_button_pm, acpi_button_suspend, acpi_button_resume); |
1be532de | 147 | |
1da177e4 | 148 | static struct acpi_driver acpi_button_driver = { |
c2b6705b | 149 | .name = "button", |
4be44fcd | 150 | .class = ACPI_BUTTON_CLASS, |
1ba90e3a | 151 | .ids = button_device_ids, |
4be44fcd LB |
152 | .ops = { |
153 | .add = acpi_button_add, | |
154 | .remove = acpi_button_remove, | |
c0968f0e | 155 | }, |
1be532de | 156 | .drv.pm = &acpi_button_pm, |
1da177e4 LT |
157 | }; |
158 | ||
159 | struct acpi_button { | |
c0968f0e DT |
160 | unsigned int type; |
161 | struct input_dev *input; | |
162 | char phys[32]; /* for input device */ | |
4be44fcd | 163 | unsigned long pushed; |
dfa46c50 LZ |
164 | int last_state; |
165 | ktime_t last_time; | |
e71eeb2a | 166 | bool suspended; |
21988a8e | 167 | bool lid_state_initialized; |
1da177e4 LT |
168 | }; |
169 | ||
7e12715e | 170 | static struct acpi_device *lid_device; |
d7cd0823 | 171 | static long lid_init_state = -1; |
7e12715e | 172 | |
dfa46c50 LZ |
173 | static unsigned long lid_report_interval __read_mostly = 500; |
174 | module_param(lid_report_interval, ulong, 0644); | |
175 | MODULE_PARM_DESC(lid_report_interval, "Interval (ms) between lid key events"); | |
176 | ||
effbe640 | 177 | /* FS Interface (/proc) */ |
4be44fcd | 178 | static struct proc_dir_entry *acpi_button_dir; |
912b7427 | 179 | static struct proc_dir_entry *acpi_lid_dir; |
4be44fcd | 180 | |
ee7e2265 LZ |
181 | static int acpi_lid_evaluate_state(struct acpi_device *device) |
182 | { | |
183 | unsigned long long lid_state; | |
184 | acpi_status status; | |
185 | ||
186 | status = acpi_evaluate_integer(device->handle, "_LID", NULL, &lid_state); | |
187 | if (ACPI_FAILURE(status)) | |
188 | return -ENODEV; | |
189 | ||
190 | return lid_state ? 1 : 0; | |
191 | } | |
192 | ||
193 | static int acpi_lid_notify_state(struct acpi_device *device, int state) | |
194 | { | |
195 | struct acpi_button *button = acpi_driver_data(device); | |
dfa46c50 LZ |
196 | ktime_t next_report; |
197 | bool do_update; | |
198 | ||
199 | /* | |
200 | * In lid_init_state=ignore mode, if user opens/closes lid | |
201 | * frequently with "open" missing, and "last_time" is also updated | |
202 | * frequently, "close" cannot be delivered to the userspace. | |
203 | * So "last_time" is only updated after a timeout or an actual | |
204 | * switch. | |
205 | */ | |
206 | if (lid_init_state != ACPI_BUTTON_LID_INIT_IGNORE || | |
207 | button->last_state != !!state) | |
208 | do_update = true; | |
209 | else | |
210 | do_update = false; | |
211 | ||
212 | next_report = ktime_add(button->last_time, | |
213 | ms_to_ktime(lid_report_interval)); | |
214 | if (button->last_state == !!state && | |
215 | ktime_after(ktime_get(), next_report)) { | |
216 | /* Complain the buggy firmware */ | |
217 | pr_warn_once("The lid device is not compliant to SW_LID.\n"); | |
ee7e2265 | 218 | |
dfa46c50 LZ |
219 | /* |
220 | * Send the unreliable complement switch event: | |
221 | * | |
222 | * On most platforms, the lid device is reliable. However | |
223 | * there are exceptions: | |
224 | * 1. Platforms returning initial lid state as "close" by | |
225 | * default after booting/resuming: | |
226 | * https://bugzilla.kernel.org/show_bug.cgi?id=89211 | |
227 | * https://bugzilla.kernel.org/show_bug.cgi?id=106151 | |
228 | * 2. Platforms never reporting "open" events: | |
229 | * https://bugzilla.kernel.org/show_bug.cgi?id=106941 | |
230 | * On these buggy platforms, the usage model of the ACPI | |
231 | * lid device actually is: | |
232 | * 1. The initial returning value of _LID may not be | |
233 | * reliable. | |
234 | * 2. The open event may not be reliable. | |
235 | * 3. The close event is reliable. | |
236 | * | |
237 | * But SW_LID is typed as input switch event, the input | |
238 | * layer checks if the event is redundant. Hence if the | |
239 | * state is not switched, the userspace cannot see this | |
240 | * platform triggered reliable event. By inserting a | |
241 | * complement switch event, it then is guaranteed that the | |
242 | * platform triggered reliable one can always be seen by | |
243 | * the userspace. | |
244 | */ | |
245 | if (lid_init_state == ACPI_BUTTON_LID_INIT_IGNORE) { | |
246 | do_update = true; | |
247 | /* | |
248 | * Do generate complement switch event for "close" | |
249 | * as "close" is reliable and wrong "open" won't | |
250 | * trigger unexpected behaviors. | |
251 | * Do not generate complement switch event for | |
252 | * "open" as "open" is not reliable and wrong | |
253 | * "close" will trigger unexpected behaviors. | |
254 | */ | |
255 | if (!state) { | |
256 | input_report_switch(button->input, | |
257 | SW_LID, state); | |
258 | input_sync(button->input); | |
259 | } | |
260 | } | |
261 | } | |
262 | /* Send the platform triggered reliable event */ | |
263 | if (do_update) { | |
ae35d656 HG |
264 | acpi_handle_debug(device->handle, "ACPI LID %s\n", |
265 | state ? "open" : "closed"); | |
dfa46c50 LZ |
266 | input_report_switch(button->input, SW_LID, !state); |
267 | input_sync(button->input); | |
268 | button->last_state = !!state; | |
269 | button->last_time = ktime_get(); | |
270 | } | |
ee7e2265 | 271 | |
e346d0cf | 272 | return 0; |
ee7e2265 LZ |
273 | } |
274 | ||
2c4c2a71 RD |
275 | static int __maybe_unused acpi_button_state_seq_show(struct seq_file *seq, |
276 | void *offset) | |
b34a8030 | 277 | { |
106c19e7 | 278 | struct acpi_device *device = seq->private; |
ee7e2265 | 279 | int state; |
b34a8030 | 280 | |
ee7e2265 | 281 | state = acpi_lid_evaluate_state(device); |
c0968f0e | 282 | seq_printf(seq, "state: %s\n", |
ee7e2265 | 283 | state < 0 ? "unsupported" : (state ? "open" : "closed")); |
d550d98d | 284 | return 0; |
b34a8030 AS |
285 | } |
286 | ||
4be44fcd | 287 | static int acpi_button_add_fs(struct acpi_device *device) |
b34a8030 | 288 | { |
1bce8113 | 289 | struct acpi_button *button = acpi_driver_data(device); |
4be44fcd | 290 | struct proc_dir_entry *entry = NULL; |
912b7427 | 291 | int ret = 0; |
b34a8030 | 292 | |
912b7427 ZR |
293 | /* procfs I/F for ACPI lid device only */ |
294 | if (button->type != ACPI_BUTTON_TYPE_LID) | |
295 | return 0; | |
296 | ||
297 | if (acpi_button_dir || acpi_lid_dir) { | |
411e3216 | 298 | pr_info("More than one Lid device found!\n"); |
912b7427 | 299 | return -EEXIST; |
b34a8030 AS |
300 | } |
301 | ||
912b7427 ZR |
302 | /* create /proc/acpi/button */ |
303 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); | |
304 | if (!acpi_button_dir) | |
d550d98d | 305 | return -ENODEV; |
b34a8030 | 306 | |
912b7427 ZR |
307 | /* create /proc/acpi/button/lid */ |
308 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
309 | if (!acpi_lid_dir) { | |
310 | ret = -ENODEV; | |
311 | goto remove_button_dir; | |
312 | } | |
b34a8030 | 313 | |
912b7427 ZR |
314 | /* create /proc/acpi/button/lid/LID/ */ |
315 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir); | |
316 | if (!acpi_device_dir(device)) { | |
317 | ret = -ENODEV; | |
318 | goto remove_lid_dir; | |
319 | } | |
b34a8030 | 320 | |
912b7427 | 321 | /* create /proc/acpi/button/lid/LID/state */ |
3f3942ac CH |
322 | entry = proc_create_single_data(ACPI_BUTTON_FILE_STATE, S_IRUGO, |
323 | acpi_device_dir(device), acpi_button_state_seq_show, | |
324 | device); | |
912b7427 ZR |
325 | if (!entry) { |
326 | ret = -ENODEV; | |
327 | goto remove_dev_dir; | |
b34a8030 AS |
328 | } |
329 | ||
912b7427 ZR |
330 | done: |
331 | return ret; | |
332 | ||
333 | remove_dev_dir: | |
334 | remove_proc_entry(acpi_device_bid(device), | |
335 | acpi_lid_dir); | |
336 | acpi_device_dir(device) = NULL; | |
337 | remove_lid_dir: | |
338 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
e370cc86 | 339 | acpi_lid_dir = NULL; |
912b7427 ZR |
340 | remove_button_dir: |
341 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
e370cc86 | 342 | acpi_button_dir = NULL; |
912b7427 | 343 | goto done; |
b34a8030 AS |
344 | } |
345 | ||
4be44fcd | 346 | static int acpi_button_remove_fs(struct acpi_device *device) |
b34a8030 | 347 | { |
c0968f0e | 348 | struct acpi_button *button = acpi_driver_data(device); |
b34a8030 | 349 | |
912b7427 ZR |
350 | if (button->type != ACPI_BUTTON_TYPE_LID) |
351 | return 0; | |
b34a8030 | 352 | |
912b7427 ZR |
353 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, |
354 | acpi_device_dir(device)); | |
355 | remove_proc_entry(acpi_device_bid(device), | |
356 | acpi_lid_dir); | |
357 | acpi_device_dir(device) = NULL; | |
358 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
e370cc86 | 359 | acpi_lid_dir = NULL; |
912b7427 | 360 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
e370cc86 | 361 | acpi_button_dir = NULL; |
b34a8030 | 362 | |
d550d98d | 363 | return 0; |
b34a8030 AS |
364 | } |
365 | ||
effbe640 | 366 | /* Driver Interface */ |
7e12715e JB |
367 | int acpi_lid_open(void) |
368 | { | |
2c907b72 JB |
369 | if (!lid_device) |
370 | return -ENODEV; | |
371 | ||
ee7e2265 | 372 | return acpi_lid_evaluate_state(lid_device); |
7e12715e JB |
373 | } |
374 | EXPORT_SYMBOL(acpi_lid_open); | |
375 | ||
7c058c7c RCS |
376 | static int acpi_lid_update_state(struct acpi_device *device, |
377 | bool signal_wakeup) | |
23de5d9e | 378 | { |
ee7e2265 | 379 | int state; |
50a4da89 | 380 | |
ee7e2265 LZ |
381 | state = acpi_lid_evaluate_state(device); |
382 | if (state < 0) | |
383 | return state; | |
7e12715e | 384 | |
7c058c7c RCS |
385 | if (state && signal_wakeup) |
386 | acpi_pm_wakeup_event(&device->dev); | |
387 | ||
ee7e2265 | 388 | return acpi_lid_notify_state(device, state); |
23de5d9e | 389 | } |
1da177e4 | 390 | |
3540c32a LZ |
391 | static void acpi_lid_initialize_state(struct acpi_device *device) |
392 | { | |
21988a8e | 393 | struct acpi_button *button = acpi_driver_data(device); |
394 | ||
3540c32a LZ |
395 | switch (lid_init_state) { |
396 | case ACPI_BUTTON_LID_INIT_OPEN: | |
397 | (void)acpi_lid_notify_state(device, 1); | |
398 | break; | |
f369fdf4 | 399 | case ACPI_BUTTON_LID_INIT_METHOD: |
7c058c7c | 400 | (void)acpi_lid_update_state(device, false); |
f369fdf4 | 401 | break; |
3540c32a LZ |
402 | case ACPI_BUTTON_LID_INIT_IGNORE: |
403 | default: | |
404 | break; | |
405 | } | |
21988a8e | 406 | |
407 | button->lid_state_initialized = true; | |
3540c32a LZ |
408 | } |
409 | ||
e4e62d5f | 410 | static void acpi_lid_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 411 | { |
0d51157d RW |
412 | struct acpi_device *device = data; |
413 | struct acpi_button *button; | |
1da177e4 | 414 | |
0d51157d | 415 | if (event != ACPI_BUTTON_NOTIFY_STATUS) { |
411e3216 RW |
416 | acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n", |
417 | event); | |
0d51157d | 418 | return; |
1da177e4 | 419 | } |
0d51157d RW |
420 | |
421 | button = acpi_driver_data(device); | |
e4e62d5f RW |
422 | if (!button->lid_state_initialized) |
423 | return; | |
0d51157d | 424 | |
e4e62d5f RW |
425 | acpi_lid_update_state(device, true); |
426 | } | |
0d51157d | 427 | |
e4e62d5f RW |
428 | static void acpi_button_notify(acpi_handle handle, u32 event, void *data) |
429 | { | |
430 | struct acpi_device *device = data; | |
431 | struct acpi_button *button; | |
c0968f0e | 432 | struct input_dev *input; |
e4e62d5f | 433 | int keycode; |
1da177e4 | 434 | |
e4e62d5f | 435 | if (event != ACPI_BUTTON_NOTIFY_STATUS) { |
411e3216 RW |
436 | acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n", |
437 | event); | |
0d51157d | 438 | return; |
1da177e4 | 439 | } |
0d51157d RW |
440 | |
441 | acpi_pm_wakeup_event(&device->dev); | |
442 | ||
e4e62d5f | 443 | button = acpi_driver_data(device); |
0d51157d RW |
444 | if (button->suspended) |
445 | return; | |
446 | ||
447 | input = button->input; | |
448 | keycode = test_bit(KEY_SLEEP, input->keybit) ? KEY_SLEEP : KEY_POWER; | |
449 | ||
450 | input_report_key(input, keycode, 1); | |
451 | input_sync(input); | |
452 | input_report_key(input, keycode, 0); | |
453 | input_sync(input); | |
454 | ||
455 | acpi_bus_generate_netlink_event(device->pnp.device_class, | |
456 | dev_name(&device->dev), | |
457 | event, ++button->pushed); | |
458 | } | |
459 | ||
460 | static void acpi_button_notify_run(void *data) | |
461 | { | |
462 | acpi_button_notify(NULL, ACPI_BUTTON_NOTIFY_STATUS, data); | |
463 | } | |
464 | ||
465 | static u32 acpi_button_event(void *data) | |
466 | { | |
467 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_button_notify_run, data); | |
468 | return ACPI_INTERRUPT_HANDLED; | |
1da177e4 LT |
469 | } |
470 | ||
90692404 | 471 | #ifdef CONFIG_PM_SLEEP |
e71eeb2a RW |
472 | static int acpi_button_suspend(struct device *dev) |
473 | { | |
474 | struct acpi_device *device = to_acpi_device(dev); | |
475 | struct acpi_button *button = acpi_driver_data(device); | |
476 | ||
477 | button->suspended = true; | |
478 | return 0; | |
479 | } | |
480 | ||
1be532de | 481 | static int acpi_button_resume(struct device *dev) |
23de5d9e | 482 | { |
16f70fea | 483 | struct input_dev *input; |
1be532de | 484 | struct acpi_device *device = to_acpi_device(dev); |
1bce8113 | 485 | struct acpi_button *button = acpi_driver_data(device); |
50a4da89 | 486 | |
e71eeb2a | 487 | button->suspended = false; |
21988a8e | 488 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
13e96214 ZR |
489 | button->last_state = !!acpi_lid_evaluate_state(device); |
490 | button->last_time = ktime_get(); | |
3540c32a | 491 | acpi_lid_initialize_state(device); |
13e96214 | 492 | } |
16f70fea KX |
493 | |
494 | if (button->type == ACPI_BUTTON_TYPE_POWER) { | |
495 | input = button->input; | |
496 | input_report_key(input, KEY_WAKEUP, 1); | |
497 | input_sync(input); | |
498 | input_report_key(input, KEY_WAKEUP, 0); | |
499 | input_sync(input); | |
500 | } | |
23de5d9e AS |
501 | return 0; |
502 | } | |
90692404 | 503 | #endif |
23de5d9e | 504 | |
84d3f6b7 HG |
505 | static int acpi_lid_input_open(struct input_dev *input) |
506 | { | |
507 | struct acpi_device *device = input_get_drvdata(input); | |
508 | struct acpi_button *button = acpi_driver_data(device); | |
509 | ||
510 | button->last_state = !!acpi_lid_evaluate_state(device); | |
511 | button->last_time = ktime_get(); | |
512 | acpi_lid_initialize_state(device); | |
513 | ||
514 | return 0; | |
515 | } | |
516 | ||
c0968f0e DT |
517 | static int acpi_button_add(struct acpi_device *device) |
518 | { | |
e4e62d5f | 519 | acpi_notify_handler handler; |
c0968f0e DT |
520 | struct acpi_button *button; |
521 | struct input_dev *input; | |
620e112c | 522 | const char *hid = acpi_device_hid(device); |
0d51157d | 523 | acpi_status status; |
620e112c | 524 | char *name, *class; |
0d51157d | 525 | int error = 0; |
1da177e4 | 526 | |
593681e2 | 527 | if (!strcmp(hid, ACPI_BUTTON_HID_LID) && |
d7cd0823 | 528 | lid_init_state == ACPI_BUTTON_LID_INIT_DISABLED) |
9e811e19 HG |
529 | return -ENODEV; |
530 | ||
c0968f0e | 531 | button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); |
1da177e4 | 532 | if (!button) |
d550d98d | 533 | return -ENOMEM; |
1da177e4 | 534 | |
db89b4f0 | 535 | device->driver_data = button; |
1da177e4 | 536 | |
c0968f0e DT |
537 | button->input = input = input_allocate_device(); |
538 | if (!input) { | |
539 | error = -ENOMEM; | |
540 | goto err_free_button; | |
541 | } | |
542 | ||
bf04a772 BH |
543 | name = acpi_device_name(device); |
544 | class = acpi_device_class(device); | |
545 | ||
d68b597c BH |
546 | if (!strcmp(hid, ACPI_BUTTON_HID_POWER) || |
547 | !strcmp(hid, ACPI_BUTTON_HID_POWERF)) { | |
1da177e4 | 548 | button->type = ACPI_BUTTON_TYPE_POWER; |
e4e62d5f | 549 | handler = acpi_button_notify; |
bf04a772 BH |
550 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); |
551 | sprintf(class, "%s/%s", | |
1da177e4 | 552 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
d68b597c BH |
553 | } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) || |
554 | !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { | |
1da177e4 | 555 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
e4e62d5f | 556 | handler = acpi_button_notify; |
bf04a772 BH |
557 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); |
558 | sprintf(class, "%s/%s", | |
1da177e4 | 559 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
bf04a772 | 560 | } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { |
1da177e4 | 561 | button->type = ACPI_BUTTON_TYPE_LID; |
e4e62d5f | 562 | handler = acpi_lid_notify; |
bf04a772 BH |
563 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); |
564 | sprintf(class, "%s/%s", | |
1da177e4 | 565 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
84d3f6b7 | 566 | input->open = acpi_lid_input_open; |
4be44fcd | 567 | } else { |
411e3216 | 568 | pr_info("Unsupported hid [%s]\n", hid); |
c0968f0e | 569 | error = -ENODEV; |
1da177e4 LT |
570 | } |
571 | ||
0d51157d RW |
572 | if (!error) |
573 | error = acpi_button_add_fs(device); | |
574 | ||
575 | if (error) { | |
576 | input_free_device(input); | |
577 | goto err_free_button; | |
578 | } | |
c0968f0e | 579 | |
bf04a772 | 580 | snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); |
c0968f0e | 581 | |
bf04a772 | 582 | input->name = name; |
c0968f0e DT |
583 | input->phys = button->phys; |
584 | input->id.bustype = BUS_HOST; | |
585 | input->id.product = button->type; | |
3b34e523 | 586 | input->dev.parent = &device->dev; |
b34a8030 | 587 | |
1da177e4 | 588 | switch (button->type) { |
c0968f0e | 589 | case ACPI_BUTTON_TYPE_POWER: |
763f527b | 590 | input_set_capability(input, EV_KEY, KEY_POWER); |
16f70fea | 591 | input_set_capability(input, EV_KEY, KEY_WAKEUP); |
1da177e4 | 592 | break; |
c0968f0e DT |
593 | |
594 | case ACPI_BUTTON_TYPE_SLEEP: | |
763f527b | 595 | input_set_capability(input, EV_KEY, KEY_SLEEP); |
1da177e4 | 596 | break; |
c0968f0e DT |
597 | |
598 | case ACPI_BUTTON_TYPE_LID: | |
763f527b | 599 | input_set_capability(input, EV_SW, SW_LID); |
1da177e4 LT |
600 | break; |
601 | } | |
602 | ||
84d3f6b7 | 603 | input_set_drvdata(input, device); |
c0968f0e DT |
604 | error = input_register_device(input); |
605 | if (error) | |
373cfc36 | 606 | goto err_remove_fs; |
0d51157d RW |
607 | |
608 | switch (device->device_type) { | |
609 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
610 | status = acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
611 | acpi_button_event, | |
612 | device); | |
613 | break; | |
614 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
615 | status = acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
616 | acpi_button_event, | |
617 | device); | |
618 | break; | |
619 | default: | |
620 | status = acpi_install_notify_handler(device->handle, | |
e4e62d5f | 621 | ACPI_DEVICE_NOTIFY, handler, |
0d51157d RW |
622 | device); |
623 | break; | |
624 | } | |
625 | if (ACPI_FAILURE(status)) { | |
626 | error = -ENODEV; | |
627 | goto err_input_unregister; | |
628 | } | |
629 | ||
7e12715e | 630 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
7e12715e JB |
631 | /* |
632 | * This assumes there's only one lid device, or if there are | |
633 | * more we only care about the last one... | |
634 | */ | |
635 | lid_device = device; | |
636 | } | |
1da177e4 | 637 | |
33e4f80e | 638 | device_init_wakeup(&device->dev, true); |
411e3216 | 639 | pr_info("%s [%s]\n", name, acpi_device_bid(device)); |
c0968f0e | 640 | return 0; |
1da177e4 | 641 | |
0d51157d RW |
642 | err_input_unregister: |
643 | input_unregister_device(input); | |
644 | err_remove_fs: | |
c0968f0e | 645 | acpi_button_remove_fs(device); |
0d51157d | 646 | err_free_button: |
c0968f0e DT |
647 | kfree(button); |
648 | return error; | |
1da177e4 LT |
649 | } |
650 | ||
6c0eb5ba | 651 | static void acpi_button_remove(struct acpi_device *device) |
1da177e4 | 652 | { |
1bce8113 | 653 | struct acpi_button *button = acpi_driver_data(device); |
1da177e4 | 654 | |
0d51157d RW |
655 | switch (device->device_type) { |
656 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
657 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
658 | acpi_button_event); | |
659 | break; | |
660 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
661 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
662 | acpi_button_event); | |
663 | break; | |
664 | default: | |
665 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
e4e62d5f RW |
666 | button->type == ACPI_BUTTON_TYPE_LID ? |
667 | acpi_lid_notify : | |
668 | acpi_button_notify); | |
0d51157d RW |
669 | break; |
670 | } | |
671 | acpi_os_wait_events_complete(); | |
672 | ||
4be44fcd | 673 | acpi_button_remove_fs(device); |
c0968f0e | 674 | input_unregister_device(button->input); |
1da177e4 | 675 | kfree(button); |
1da177e4 LT |
676 | } |
677 | ||
e4dca7b7 KC |
678 | static int param_set_lid_init_state(const char *val, |
679 | const struct kernel_param *kp) | |
3540c32a | 680 | { |
065bd4d3 HG |
681 | int i; |
682 | ||
683 | i = sysfs_match_string(lid_init_state_str, val); | |
684 | if (i < 0) | |
685 | return i; | |
686 | ||
687 | lid_init_state = i; | |
688 | pr_info("Initial lid state set to '%s'\n", lid_init_state_str[i]); | |
689 | return 0; | |
3540c32a LZ |
690 | } |
691 | ||
065bd4d3 | 692 | static int param_get_lid_init_state(char *buf, const struct kernel_param *kp) |
3540c32a | 693 | { |
065bd4d3 HG |
694 | int i, c = 0; |
695 | ||
696 | for (i = 0; i < ARRAY_SIZE(lid_init_state_str); i++) | |
697 | if (i == lid_init_state) | |
698 | c += sprintf(buf + c, "[%s] ", lid_init_state_str[i]); | |
699 | else | |
700 | c += sprintf(buf + c, "%s ", lid_init_state_str[i]); | |
701 | ||
702 | buf[c - 1] = '\n'; /* Replace the final space with a newline */ | |
703 | ||
704 | return c; | |
3540c32a LZ |
705 | } |
706 | ||
707 | module_param_call(lid_init_state, | |
708 | param_set_lid_init_state, param_get_lid_init_state, | |
709 | NULL, 0644); | |
710 | MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state"); | |
711 | ||
ac1e55b1 AB |
712 | static int acpi_button_register_driver(struct acpi_driver *driver) |
713 | { | |
d7cd0823 HG |
714 | const struct dmi_system_id *dmi_id; |
715 | ||
716 | if (lid_init_state == -1) { | |
717 | dmi_id = dmi_first_match(dmi_lid_quirks); | |
718 | if (dmi_id) | |
719 | lid_init_state = (long)dmi_id->driver_data; | |
720 | else | |
721 | lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; | |
722 | } | |
723 | ||
ac1e55b1 AB |
724 | /* |
725 | * Modules such as nouveau.ko and i915.ko have a link time dependency | |
726 | * on acpi_lid_open(), and would therefore not be loadable on ACPI | |
727 | * capable kernels booted in non-ACPI mode if the return value of | |
728 | * acpi_bus_register_driver() is returned from here with ACPI disabled | |
729 | * when this driver is built as a module. | |
730 | */ | |
731 | if (acpi_disabled) | |
732 | return 0; | |
733 | ||
734 | return acpi_bus_register_driver(driver); | |
735 | } | |
736 | ||
737 | static void acpi_button_unregister_driver(struct acpi_driver *driver) | |
738 | { | |
739 | if (!acpi_disabled) | |
740 | acpi_bus_unregister_driver(driver); | |
741 | } | |
742 | ||
743 | module_driver(acpi_button_driver, acpi_button_register_driver, | |
744 | acpi_button_unregister_driver); |