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Commit | Line | Data |
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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, |
9e811e19 | 79 | }, |
1a20d409 UH |
80 | { |
81 | /* | |
82 | * Lenovo Yoga 9 14ITL5, initial notification of the LID device | |
83 | * never happens. | |
84 | */ | |
85 | .matches = { | |
86 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
87 | DMI_MATCH(DMI_PRODUCT_NAME, "82BG"), | |
88 | }, | |
89 | .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, | |
90 | }, | |
932e1ba4 HG |
91 | { |
92 | /* | |
93 | * Medion Akoya E2215T, notification of the LID device only | |
94 | * happens on close, not on open and _LID always returns closed. | |
95 | */ | |
96 | .matches = { | |
97 | DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), | |
7daaa063 HG |
98 | DMI_MATCH(DMI_PRODUCT_NAME, "E2215T"), |
99 | }, | |
100 | .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, | |
101 | }, | |
102 | { | |
103 | /* | |
104 | * Medion Akoya E2228T, notification of the LID device only | |
105 | * happens on close, not on open and _LID always returns closed. | |
106 | */ | |
107 | .matches = { | |
108 | DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), | |
109 | DMI_MATCH(DMI_PRODUCT_NAME, "E2228T"), | |
932e1ba4 HG |
110 | }, |
111 | .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, | |
112 | }, | |
05289049 JE |
113 | { |
114 | /* | |
115 | * Razer Blade Stealth 13 late 2019, notification of the LID device | |
116 | * only happens on close, not on open and _LID always returns closed. | |
117 | */ | |
118 | .matches = { | |
119 | DMI_MATCH(DMI_SYS_VENDOR, "Razer"), | |
120 | DMI_MATCH(DMI_PRODUCT_NAME, "Razer Blade Stealth 13 Late 2019"), | |
121 | }, | |
122 | .driver_data = (void *)(long)ACPI_BUTTON_LID_INIT_OPEN, | |
123 | }, | |
9e811e19 HG |
124 | {} |
125 | }; | |
126 | ||
4be44fcd | 127 | static int acpi_button_add(struct acpi_device *device); |
51fac838 | 128 | static int acpi_button_remove(struct acpi_device *device); |
373cfc36 | 129 | static void acpi_button_notify(struct acpi_device *device, u32 event); |
1da177e4 | 130 | |
90692404 | 131 | #ifdef CONFIG_PM_SLEEP |
e71eeb2a | 132 | static int acpi_button_suspend(struct device *dev); |
1be532de | 133 | static int acpi_button_resume(struct device *dev); |
2de9fd17 | 134 | #else |
e71eeb2a | 135 | #define acpi_button_suspend NULL |
2de9fd17 | 136 | #define acpi_button_resume NULL |
90692404 | 137 | #endif |
e71eeb2a | 138 | static SIMPLE_DEV_PM_OPS(acpi_button_pm, acpi_button_suspend, acpi_button_resume); |
1be532de | 139 | |
1da177e4 | 140 | static struct acpi_driver acpi_button_driver = { |
c2b6705b | 141 | .name = "button", |
4be44fcd | 142 | .class = ACPI_BUTTON_CLASS, |
1ba90e3a | 143 | .ids = button_device_ids, |
4be44fcd LB |
144 | .ops = { |
145 | .add = acpi_button_add, | |
146 | .remove = acpi_button_remove, | |
373cfc36 | 147 | .notify = acpi_button_notify, |
c0968f0e | 148 | }, |
1be532de | 149 | .drv.pm = &acpi_button_pm, |
1da177e4 LT |
150 | }; |
151 | ||
152 | struct acpi_button { | |
c0968f0e DT |
153 | unsigned int type; |
154 | struct input_dev *input; | |
155 | char phys[32]; /* for input device */ | |
4be44fcd | 156 | unsigned long pushed; |
dfa46c50 LZ |
157 | int last_state; |
158 | ktime_t last_time; | |
e71eeb2a | 159 | bool suspended; |
21988a8e | 160 | bool lid_state_initialized; |
1da177e4 LT |
161 | }; |
162 | ||
7e12715e | 163 | static struct acpi_device *lid_device; |
d7cd0823 | 164 | static long lid_init_state = -1; |
7e12715e | 165 | |
dfa46c50 LZ |
166 | static unsigned long lid_report_interval __read_mostly = 500; |
167 | module_param(lid_report_interval, ulong, 0644); | |
168 | MODULE_PARM_DESC(lid_report_interval, "Interval (ms) between lid key events"); | |
169 | ||
effbe640 | 170 | /* FS Interface (/proc) */ |
4be44fcd | 171 | static struct proc_dir_entry *acpi_button_dir; |
912b7427 | 172 | static struct proc_dir_entry *acpi_lid_dir; |
4be44fcd | 173 | |
ee7e2265 LZ |
174 | static int acpi_lid_evaluate_state(struct acpi_device *device) |
175 | { | |
176 | unsigned long long lid_state; | |
177 | acpi_status status; | |
178 | ||
179 | status = acpi_evaluate_integer(device->handle, "_LID", NULL, &lid_state); | |
180 | if (ACPI_FAILURE(status)) | |
181 | return -ENODEV; | |
182 | ||
183 | return lid_state ? 1 : 0; | |
184 | } | |
185 | ||
186 | static int acpi_lid_notify_state(struct acpi_device *device, int state) | |
187 | { | |
188 | struct acpi_button *button = acpi_driver_data(device); | |
dfa46c50 LZ |
189 | ktime_t next_report; |
190 | bool do_update; | |
191 | ||
192 | /* | |
193 | * In lid_init_state=ignore mode, if user opens/closes lid | |
194 | * frequently with "open" missing, and "last_time" is also updated | |
195 | * frequently, "close" cannot be delivered to the userspace. | |
196 | * So "last_time" is only updated after a timeout or an actual | |
197 | * switch. | |
198 | */ | |
199 | if (lid_init_state != ACPI_BUTTON_LID_INIT_IGNORE || | |
200 | button->last_state != !!state) | |
201 | do_update = true; | |
202 | else | |
203 | do_update = false; | |
204 | ||
205 | next_report = ktime_add(button->last_time, | |
206 | ms_to_ktime(lid_report_interval)); | |
207 | if (button->last_state == !!state && | |
208 | ktime_after(ktime_get(), next_report)) { | |
209 | /* Complain the buggy firmware */ | |
210 | pr_warn_once("The lid device is not compliant to SW_LID.\n"); | |
ee7e2265 | 211 | |
dfa46c50 LZ |
212 | /* |
213 | * Send the unreliable complement switch event: | |
214 | * | |
215 | * On most platforms, the lid device is reliable. However | |
216 | * there are exceptions: | |
217 | * 1. Platforms returning initial lid state as "close" by | |
218 | * default after booting/resuming: | |
219 | * https://bugzilla.kernel.org/show_bug.cgi?id=89211 | |
220 | * https://bugzilla.kernel.org/show_bug.cgi?id=106151 | |
221 | * 2. Platforms never reporting "open" events: | |
222 | * https://bugzilla.kernel.org/show_bug.cgi?id=106941 | |
223 | * On these buggy platforms, the usage model of the ACPI | |
224 | * lid device actually is: | |
225 | * 1. The initial returning value of _LID may not be | |
226 | * reliable. | |
227 | * 2. The open event may not be reliable. | |
228 | * 3. The close event is reliable. | |
229 | * | |
230 | * But SW_LID is typed as input switch event, the input | |
231 | * layer checks if the event is redundant. Hence if the | |
232 | * state is not switched, the userspace cannot see this | |
233 | * platform triggered reliable event. By inserting a | |
234 | * complement switch event, it then is guaranteed that the | |
235 | * platform triggered reliable one can always be seen by | |
236 | * the userspace. | |
237 | */ | |
238 | if (lid_init_state == ACPI_BUTTON_LID_INIT_IGNORE) { | |
239 | do_update = true; | |
240 | /* | |
241 | * Do generate complement switch event for "close" | |
242 | * as "close" is reliable and wrong "open" won't | |
243 | * trigger unexpected behaviors. | |
244 | * Do not generate complement switch event for | |
245 | * "open" as "open" is not reliable and wrong | |
246 | * "close" will trigger unexpected behaviors. | |
247 | */ | |
248 | if (!state) { | |
249 | input_report_switch(button->input, | |
250 | SW_LID, state); | |
251 | input_sync(button->input); | |
252 | } | |
253 | } | |
254 | } | |
255 | /* Send the platform triggered reliable event */ | |
256 | if (do_update) { | |
ae35d656 HG |
257 | acpi_handle_debug(device->handle, "ACPI LID %s\n", |
258 | state ? "open" : "closed"); | |
dfa46c50 LZ |
259 | input_report_switch(button->input, SW_LID, !state); |
260 | input_sync(button->input); | |
261 | button->last_state = !!state; | |
262 | button->last_time = ktime_get(); | |
263 | } | |
ee7e2265 | 264 | |
e346d0cf | 265 | return 0; |
ee7e2265 LZ |
266 | } |
267 | ||
2c4c2a71 RD |
268 | static int __maybe_unused acpi_button_state_seq_show(struct seq_file *seq, |
269 | void *offset) | |
b34a8030 | 270 | { |
106c19e7 | 271 | struct acpi_device *device = seq->private; |
ee7e2265 | 272 | int state; |
b34a8030 | 273 | |
ee7e2265 | 274 | state = acpi_lid_evaluate_state(device); |
c0968f0e | 275 | seq_printf(seq, "state: %s\n", |
ee7e2265 | 276 | state < 0 ? "unsupported" : (state ? "open" : "closed")); |
d550d98d | 277 | return 0; |
b34a8030 AS |
278 | } |
279 | ||
4be44fcd | 280 | static int acpi_button_add_fs(struct acpi_device *device) |
b34a8030 | 281 | { |
1bce8113 | 282 | struct acpi_button *button = acpi_driver_data(device); |
4be44fcd | 283 | struct proc_dir_entry *entry = NULL; |
912b7427 | 284 | int ret = 0; |
b34a8030 | 285 | |
912b7427 ZR |
286 | /* procfs I/F for ACPI lid device only */ |
287 | if (button->type != ACPI_BUTTON_TYPE_LID) | |
288 | return 0; | |
289 | ||
290 | if (acpi_button_dir || acpi_lid_dir) { | |
411e3216 | 291 | pr_info("More than one Lid device found!\n"); |
912b7427 | 292 | return -EEXIST; |
b34a8030 AS |
293 | } |
294 | ||
912b7427 ZR |
295 | /* create /proc/acpi/button */ |
296 | acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir); | |
297 | if (!acpi_button_dir) | |
d550d98d | 298 | return -ENODEV; |
b34a8030 | 299 | |
912b7427 ZR |
300 | /* create /proc/acpi/button/lid */ |
301 | acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
302 | if (!acpi_lid_dir) { | |
303 | ret = -ENODEV; | |
304 | goto remove_button_dir; | |
305 | } | |
b34a8030 | 306 | |
912b7427 ZR |
307 | /* create /proc/acpi/button/lid/LID/ */ |
308 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir); | |
309 | if (!acpi_device_dir(device)) { | |
310 | ret = -ENODEV; | |
311 | goto remove_lid_dir; | |
312 | } | |
b34a8030 | 313 | |
912b7427 | 314 | /* create /proc/acpi/button/lid/LID/state */ |
3f3942ac CH |
315 | entry = proc_create_single_data(ACPI_BUTTON_FILE_STATE, S_IRUGO, |
316 | acpi_device_dir(device), acpi_button_state_seq_show, | |
317 | device); | |
912b7427 ZR |
318 | if (!entry) { |
319 | ret = -ENODEV; | |
320 | goto remove_dev_dir; | |
b34a8030 AS |
321 | } |
322 | ||
912b7427 ZR |
323 | done: |
324 | return ret; | |
325 | ||
326 | remove_dev_dir: | |
327 | remove_proc_entry(acpi_device_bid(device), | |
328 | acpi_lid_dir); | |
329 | acpi_device_dir(device) = NULL; | |
330 | remove_lid_dir: | |
331 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
e370cc86 | 332 | acpi_lid_dir = NULL; |
912b7427 ZR |
333 | remove_button_dir: |
334 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); | |
e370cc86 | 335 | acpi_button_dir = NULL; |
912b7427 | 336 | goto done; |
b34a8030 AS |
337 | } |
338 | ||
4be44fcd | 339 | static int acpi_button_remove_fs(struct acpi_device *device) |
b34a8030 | 340 | { |
c0968f0e | 341 | struct acpi_button *button = acpi_driver_data(device); |
b34a8030 | 342 | |
912b7427 ZR |
343 | if (button->type != ACPI_BUTTON_TYPE_LID) |
344 | return 0; | |
b34a8030 | 345 | |
912b7427 ZR |
346 | remove_proc_entry(ACPI_BUTTON_FILE_STATE, |
347 | acpi_device_dir(device)); | |
348 | remove_proc_entry(acpi_device_bid(device), | |
349 | acpi_lid_dir); | |
350 | acpi_device_dir(device) = NULL; | |
351 | remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir); | |
e370cc86 | 352 | acpi_lid_dir = NULL; |
912b7427 | 353 | remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir); |
e370cc86 | 354 | acpi_button_dir = NULL; |
b34a8030 | 355 | |
d550d98d | 356 | return 0; |
b34a8030 AS |
357 | } |
358 | ||
effbe640 | 359 | /* Driver Interface */ |
7e12715e JB |
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 | ||
7c058c7c RCS |
369 | static int acpi_lid_update_state(struct acpi_device *device, |
370 | bool signal_wakeup) | |
23de5d9e | 371 | { |
ee7e2265 | 372 | int state; |
50a4da89 | 373 | |
ee7e2265 LZ |
374 | state = acpi_lid_evaluate_state(device); |
375 | if (state < 0) | |
376 | return state; | |
7e12715e | 377 | |
7c058c7c RCS |
378 | if (state && signal_wakeup) |
379 | acpi_pm_wakeup_event(&device->dev); | |
380 | ||
ee7e2265 | 381 | return acpi_lid_notify_state(device, state); |
23de5d9e | 382 | } |
1da177e4 | 383 | |
3540c32a LZ |
384 | static void acpi_lid_initialize_state(struct acpi_device *device) |
385 | { | |
21988a8e | 386 | struct acpi_button *button = acpi_driver_data(device); |
387 | ||
3540c32a LZ |
388 | switch (lid_init_state) { |
389 | case ACPI_BUTTON_LID_INIT_OPEN: | |
390 | (void)acpi_lid_notify_state(device, 1); | |
391 | break; | |
f369fdf4 | 392 | case ACPI_BUTTON_LID_INIT_METHOD: |
7c058c7c | 393 | (void)acpi_lid_update_state(device, false); |
f369fdf4 | 394 | break; |
3540c32a LZ |
395 | case ACPI_BUTTON_LID_INIT_IGNORE: |
396 | default: | |
397 | break; | |
398 | } | |
21988a8e | 399 | |
400 | button->lid_state_initialized = true; | |
3540c32a LZ |
401 | } |
402 | ||
373cfc36 | 403 | static void acpi_button_notify(struct acpi_device *device, u32 event) |
1da177e4 | 404 | { |
373cfc36 | 405 | struct acpi_button *button = acpi_driver_data(device); |
c0968f0e | 406 | struct input_dev *input; |
1da177e4 | 407 | |
1da177e4 | 408 | switch (event) { |
373cfc36 BH |
409 | case ACPI_FIXED_HARDWARE_EVENT: |
410 | event = ACPI_BUTTON_NOTIFY_STATUS; | |
57d2dd4b | 411 | fallthrough; |
1da177e4 | 412 | case ACPI_BUTTON_NOTIFY_STATUS: |
c0968f0e | 413 | input = button->input; |
c0968f0e | 414 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
21988a8e | 415 | if (button->lid_state_initialized) |
7c058c7c | 416 | acpi_lid_update_state(device, true); |
c0968f0e | 417 | } else { |
e71eeb2a RW |
418 | int keycode; |
419 | ||
33e4f80e | 420 | acpi_pm_wakeup_event(&device->dev); |
e71eeb2a RW |
421 | if (button->suspended) |
422 | break; | |
c0968f0e | 423 | |
e71eeb2a RW |
424 | keycode = test_bit(KEY_SLEEP, input->keybit) ? |
425 | KEY_SLEEP : KEY_POWER; | |
c0968f0e DT |
426 | input_report_key(input, keycode, 1); |
427 | input_sync(input); | |
428 | input_report_key(input, keycode, 0); | |
df316e93 | 429 | input_sync(input); |
1f83511b | 430 | |
0bf6368e LT |
431 | acpi_bus_generate_netlink_event( |
432 | device->pnp.device_class, | |
433 | dev_name(&device->dev), | |
434 | event, ++button->pushed); | |
c0968f0e | 435 | } |
1da177e4 LT |
436 | break; |
437 | default: | |
411e3216 RW |
438 | acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n", |
439 | event); | |
1da177e4 LT |
440 | break; |
441 | } | |
1da177e4 LT |
442 | } |
443 | ||
90692404 | 444 | #ifdef CONFIG_PM_SLEEP |
e71eeb2a RW |
445 | static int acpi_button_suspend(struct device *dev) |
446 | { | |
447 | struct acpi_device *device = to_acpi_device(dev); | |
448 | struct acpi_button *button = acpi_driver_data(device); | |
449 | ||
450 | button->suspended = true; | |
451 | return 0; | |
452 | } | |
453 | ||
1be532de | 454 | static int acpi_button_resume(struct device *dev) |
23de5d9e | 455 | { |
1be532de | 456 | struct acpi_device *device = to_acpi_device(dev); |
1bce8113 | 457 | struct acpi_button *button = acpi_driver_data(device); |
50a4da89 | 458 | |
e71eeb2a | 459 | button->suspended = false; |
21988a8e | 460 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
13e96214 ZR |
461 | button->last_state = !!acpi_lid_evaluate_state(device); |
462 | button->last_time = ktime_get(); | |
3540c32a | 463 | acpi_lid_initialize_state(device); |
13e96214 | 464 | } |
23de5d9e AS |
465 | return 0; |
466 | } | |
90692404 | 467 | #endif |
23de5d9e | 468 | |
84d3f6b7 HG |
469 | static int acpi_lid_input_open(struct input_dev *input) |
470 | { | |
471 | struct acpi_device *device = input_get_drvdata(input); | |
472 | struct acpi_button *button = acpi_driver_data(device); | |
473 | ||
474 | button->last_state = !!acpi_lid_evaluate_state(device); | |
475 | button->last_time = ktime_get(); | |
476 | acpi_lid_initialize_state(device); | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
c0968f0e DT |
481 | static int acpi_button_add(struct acpi_device *device) |
482 | { | |
c0968f0e DT |
483 | struct acpi_button *button; |
484 | struct input_dev *input; | |
620e112c TR |
485 | const char *hid = acpi_device_hid(device); |
486 | char *name, *class; | |
1bce8113 | 487 | int error; |
1da177e4 | 488 | |
593681e2 | 489 | if (!strcmp(hid, ACPI_BUTTON_HID_LID) && |
d7cd0823 | 490 | lid_init_state == ACPI_BUTTON_LID_INIT_DISABLED) |
9e811e19 HG |
491 | return -ENODEV; |
492 | ||
c0968f0e | 493 | button = kzalloc(sizeof(struct acpi_button), GFP_KERNEL); |
1da177e4 | 494 | if (!button) |
d550d98d | 495 | return -ENOMEM; |
1da177e4 | 496 | |
db89b4f0 | 497 | device->driver_data = button; |
1da177e4 | 498 | |
c0968f0e DT |
499 | button->input = input = input_allocate_device(); |
500 | if (!input) { | |
501 | error = -ENOMEM; | |
502 | goto err_free_button; | |
503 | } | |
504 | ||
bf04a772 BH |
505 | name = acpi_device_name(device); |
506 | class = acpi_device_class(device); | |
507 | ||
d68b597c BH |
508 | if (!strcmp(hid, ACPI_BUTTON_HID_POWER) || |
509 | !strcmp(hid, ACPI_BUTTON_HID_POWERF)) { | |
1da177e4 | 510 | button->type = ACPI_BUTTON_TYPE_POWER; |
bf04a772 BH |
511 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_POWER); |
512 | sprintf(class, "%s/%s", | |
1da177e4 | 513 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_POWER); |
d68b597c BH |
514 | } else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEP) || |
515 | !strcmp(hid, ACPI_BUTTON_HID_SLEEPF)) { | |
1da177e4 | 516 | button->type = ACPI_BUTTON_TYPE_SLEEP; |
bf04a772 BH |
517 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_SLEEP); |
518 | sprintf(class, "%s/%s", | |
1da177e4 | 519 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_SLEEP); |
bf04a772 | 520 | } else if (!strcmp(hid, ACPI_BUTTON_HID_LID)) { |
1da177e4 | 521 | button->type = ACPI_BUTTON_TYPE_LID; |
bf04a772 BH |
522 | strcpy(name, ACPI_BUTTON_DEVICE_NAME_LID); |
523 | sprintf(class, "%s/%s", | |
1da177e4 | 524 | ACPI_BUTTON_CLASS, ACPI_BUTTON_SUBCLASS_LID); |
84d3f6b7 | 525 | input->open = acpi_lid_input_open; |
4be44fcd | 526 | } else { |
411e3216 | 527 | pr_info("Unsupported hid [%s]\n", hid); |
c0968f0e DT |
528 | error = -ENODEV; |
529 | goto err_free_input; | |
1da177e4 LT |
530 | } |
531 | ||
c0968f0e DT |
532 | error = acpi_button_add_fs(device); |
533 | if (error) | |
534 | goto err_free_input; | |
535 | ||
bf04a772 | 536 | snprintf(button->phys, sizeof(button->phys), "%s/button/input0", hid); |
c0968f0e | 537 | |
bf04a772 | 538 | input->name = name; |
c0968f0e DT |
539 | input->phys = button->phys; |
540 | input->id.bustype = BUS_HOST; | |
541 | input->id.product = button->type; | |
3b34e523 | 542 | input->dev.parent = &device->dev; |
b34a8030 | 543 | |
1da177e4 | 544 | switch (button->type) { |
c0968f0e | 545 | case ACPI_BUTTON_TYPE_POWER: |
763f527b | 546 | input_set_capability(input, EV_KEY, KEY_POWER); |
1da177e4 | 547 | break; |
c0968f0e DT |
548 | |
549 | case ACPI_BUTTON_TYPE_SLEEP: | |
763f527b | 550 | input_set_capability(input, EV_KEY, KEY_SLEEP); |
1da177e4 | 551 | break; |
c0968f0e DT |
552 | |
553 | case ACPI_BUTTON_TYPE_LID: | |
763f527b | 554 | input_set_capability(input, EV_SW, SW_LID); |
1da177e4 LT |
555 | break; |
556 | } | |
557 | ||
84d3f6b7 | 558 | input_set_drvdata(input, device); |
c0968f0e DT |
559 | error = input_register_device(input); |
560 | if (error) | |
373cfc36 | 561 | goto err_remove_fs; |
7e12715e | 562 | if (button->type == ACPI_BUTTON_TYPE_LID) { |
7e12715e JB |
563 | /* |
564 | * This assumes there's only one lid device, or if there are | |
565 | * more we only care about the last one... | |
566 | */ | |
567 | lid_device = device; | |
568 | } | |
1da177e4 | 569 | |
33e4f80e | 570 | device_init_wakeup(&device->dev, true); |
411e3216 | 571 | pr_info("%s [%s]\n", name, acpi_device_bid(device)); |
c0968f0e | 572 | return 0; |
1da177e4 | 573 | |
c0968f0e DT |
574 | err_remove_fs: |
575 | acpi_button_remove_fs(device); | |
576 | err_free_input: | |
577 | input_free_device(input); | |
578 | err_free_button: | |
579 | kfree(button); | |
580 | return error; | |
1da177e4 LT |
581 | } |
582 | ||
51fac838 | 583 | static int acpi_button_remove(struct acpi_device *device) |
1da177e4 | 584 | { |
1bce8113 | 585 | struct acpi_button *button = acpi_driver_data(device); |
1da177e4 | 586 | |
4be44fcd | 587 | acpi_button_remove_fs(device); |
c0968f0e | 588 | input_unregister_device(button->input); |
1da177e4 | 589 | kfree(button); |
d550d98d | 590 | return 0; |
1da177e4 LT |
591 | } |
592 | ||
e4dca7b7 KC |
593 | static int param_set_lid_init_state(const char *val, |
594 | const struct kernel_param *kp) | |
3540c32a | 595 | { |
065bd4d3 HG |
596 | int i; |
597 | ||
598 | i = sysfs_match_string(lid_init_state_str, val); | |
599 | if (i < 0) | |
600 | return i; | |
601 | ||
602 | lid_init_state = i; | |
603 | pr_info("Initial lid state set to '%s'\n", lid_init_state_str[i]); | |
604 | return 0; | |
3540c32a LZ |
605 | } |
606 | ||
065bd4d3 | 607 | static int param_get_lid_init_state(char *buf, const struct kernel_param *kp) |
3540c32a | 608 | { |
065bd4d3 HG |
609 | int i, c = 0; |
610 | ||
611 | for (i = 0; i < ARRAY_SIZE(lid_init_state_str); i++) | |
612 | if (i == lid_init_state) | |
613 | c += sprintf(buf + c, "[%s] ", lid_init_state_str[i]); | |
614 | else | |
615 | c += sprintf(buf + c, "%s ", lid_init_state_str[i]); | |
616 | ||
617 | buf[c - 1] = '\n'; /* Replace the final space with a newline */ | |
618 | ||
619 | return c; | |
3540c32a LZ |
620 | } |
621 | ||
622 | module_param_call(lid_init_state, | |
623 | param_set_lid_init_state, param_get_lid_init_state, | |
624 | NULL, 0644); | |
625 | MODULE_PARM_DESC(lid_init_state, "Behavior for reporting LID initial state"); | |
626 | ||
ac1e55b1 AB |
627 | static int acpi_button_register_driver(struct acpi_driver *driver) |
628 | { | |
d7cd0823 HG |
629 | const struct dmi_system_id *dmi_id; |
630 | ||
631 | if (lid_init_state == -1) { | |
632 | dmi_id = dmi_first_match(dmi_lid_quirks); | |
633 | if (dmi_id) | |
634 | lid_init_state = (long)dmi_id->driver_data; | |
635 | else | |
636 | lid_init_state = ACPI_BUTTON_LID_INIT_METHOD; | |
637 | } | |
638 | ||
ac1e55b1 AB |
639 | /* |
640 | * Modules such as nouveau.ko and i915.ko have a link time dependency | |
641 | * on acpi_lid_open(), and would therefore not be loadable on ACPI | |
642 | * capable kernels booted in non-ACPI mode if the return value of | |
643 | * acpi_bus_register_driver() is returned from here with ACPI disabled | |
644 | * when this driver is built as a module. | |
645 | */ | |
646 | if (acpi_disabled) | |
647 | return 0; | |
648 | ||
649 | return acpi_bus_register_driver(driver); | |
650 | } | |
651 | ||
652 | static void acpi_button_unregister_driver(struct acpi_driver *driver) | |
653 | { | |
654 | if (!acpi_disabled) | |
655 | acpi_bus_unregister_driver(driver); | |
656 | } | |
657 | ||
658 | module_driver(acpi_button_driver, acpi_button_register_driver, | |
659 | acpi_button_unregister_driver); |