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Commit | Line | Data |
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55716d26 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * sleep.c - ACPI sleep support. | |
4 | * | |
e2a5b420 | 5 | * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> |
1da177e4 LT |
6 | * Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com> |
7 | * Copyright (c) 2000-2003 Patrick Mochel | |
8 | * Copyright (c) 2003 Open Source Development Lab | |
1da177e4 LT |
9 | */ |
10 | ||
11 | #include <linux/delay.h> | |
12 | #include <linux/irq.h> | |
13 | #include <linux/dmi.h> | |
14 | #include <linux/device.h> | |
a8d46b9e | 15 | #include <linux/interrupt.h> |
1da177e4 | 16 | #include <linux/suspend.h> |
e49f711c | 17 | #include <linux/reboot.h> |
d1ee4335 | 18 | #include <linux/acpi.h> |
a2ef5c4f | 19 | #include <linux/module.h> |
504997cf | 20 | #include <linux/syscore_ops.h> |
f216cc37 | 21 | #include <asm/io.h> |
bb3632c6 | 22 | #include <trace/events/power.h> |
f216cc37 | 23 | |
e60cc7a6 | 24 | #include "internal.h" |
1da177e4 LT |
25 | #include "sleep.h" |
26 | ||
13737181 CY |
27 | /* |
28 | * Some HW-full platforms do not have _S5, so they may need | |
29 | * to leverage efi power off for a shutdown. | |
30 | */ | |
31 | bool acpi_no_s5; | |
01eac60b | 32 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
1da177e4 | 33 | |
e49f711c ZY |
34 | static void acpi_sleep_tts_switch(u32 acpi_state) |
35 | { | |
0db98202 | 36 | acpi_status status; |
e49f711c | 37 | |
0db98202 | 38 | status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state); |
e49f711c ZY |
39 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
40 | /* | |
41 | * OS can't evaluate the _TTS object correctly. Some warning | |
42 | * message will be printed. But it won't break anything. | |
43 | */ | |
44 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); | |
45 | } | |
46 | } | |
47 | ||
9713adc2 | 48 | static int tts_notify_reboot(struct notifier_block *this, |
e49f711c ZY |
49 | unsigned long code, void *x) |
50 | { | |
51 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
52 | return NOTIFY_DONE; | |
53 | } | |
54 | ||
9713adc2 RW |
55 | static struct notifier_block tts_notifier = { |
56 | .notifier_call = tts_notify_reboot, | |
e49f711c ZY |
57 | .next = NULL, |
58 | .priority = 0, | |
59 | }; | |
60 | ||
c9b6c8f6 | 61 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
62 | { |
63 | #ifdef CONFIG_ACPI_SLEEP | |
8c53b318 SC |
64 | unsigned long acpi_wakeup_address; |
65 | ||
2f3f2226 AS |
66 | /* do we have a wakeup address for S2 and S3? */ |
67 | if (acpi_state == ACPI_STATE_S3) { | |
8c53b318 | 68 | acpi_wakeup_address = acpi_get_wakeup_address(); |
319b6ffc | 69 | if (!acpi_wakeup_address) |
2f3f2226 | 70 | return -EFAULT; |
e3e9b577 | 71 | acpi_set_waking_vector(acpi_wakeup_address); |
2f3f2226 AS |
72 | |
73 | } | |
74 | ACPI_FLUSH_CPU_CACHE(); | |
2f3f2226 | 75 | #endif |
c9b6c8f6 RW |
76 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
77 | acpi_state); | |
78f5f023 | 78 | acpi_enable_wakeup_devices(acpi_state); |
2f3f2226 AS |
79 | acpi_enter_sleep_state_prep(acpi_state); |
80 | return 0; | |
81 | } | |
82 | ||
ad5a449b | 83 | bool acpi_sleep_state_supported(u8 sleep_state) |
a4e90bed RW |
84 | { |
85 | acpi_status status; | |
86 | u8 type_a, type_b; | |
87 | ||
88 | status = acpi_get_sleep_type_data(sleep_state, &type_a, &type_b); | |
89 | return ACPI_SUCCESS(status) && (!acpi_gbl_reduced_hardware | |
90 | || (acpi_gbl_FADT.sleep_control.address | |
91 | && acpi_gbl_FADT.sleep_status.address)); | |
92 | } | |
93 | ||
5d1e072b | 94 | #ifdef CONFIG_ACPI_SLEEP |
068b47d0 RW |
95 | static bool sleep_no_lps0 __read_mostly; |
96 | module_param(sleep_no_lps0, bool, 0644); | |
97 | MODULE_PARM_DESC(sleep_no_lps0, "Do not use the special LPS0 device interface"); | |
98 | ||
091aad6a | 99 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
a6ae7594 RW |
100 | |
101 | u32 acpi_target_system_state(void) | |
102 | { | |
103 | return acpi_target_sleep_state; | |
104 | } | |
fad16dd9 | 105 | EXPORT_SYMBOL_GPL(acpi_target_system_state); |
a6ae7594 | 106 | |
a5ca7345 | 107 | static bool pwr_btn_event_pending; |
091aad6a | 108 | |
72ad5d77 RW |
109 | /* |
110 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
111 | * and to restore them during the subsequent resume. Windows does that also for | |
112 | * suspend to RAM. However, it is known that this mechanism does not work on | |
113 | * all machines, so we allow the user to disable it with the help of the | |
114 | * 'acpi_sleep=nonvs' kernel command line option. | |
115 | */ | |
116 | static bool nvs_nosave; | |
117 | ||
118 | void __init acpi_nvs_nosave(void) | |
119 | { | |
120 | nvs_nosave = true; | |
121 | } | |
122 | ||
1bad2f19 KCA |
123 | /* |
124 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
125 | * but says nothing about saving NVS during S3. Not all versions of Windows | |
126 | * save NVS on S3 suspend either, and it is clear that not all systems need | |
127 | * NVS to be saved at S3 time. To improve suspend/resume time, allow the | |
128 | * user to disable saving NVS on S3 if their system does not require it, but | |
129 | * continue to save/restore NVS for S4 as specified. | |
130 | */ | |
131 | static bool nvs_nosave_s3; | |
132 | ||
133 | void __init acpi_nvs_nosave_s3(void) | |
134 | { | |
135 | nvs_nosave_s3 = true; | |
136 | } | |
137 | ||
cbc00c13 ZR |
138 | static int __init init_nvs_save_s3(const struct dmi_system_id *d) |
139 | { | |
140 | nvs_nosave_s3 = false; | |
141 | return 0; | |
142 | } | |
143 | ||
d8f3de0d RW |
144 | /* |
145 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
146 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
147 | * kernel command line option that causes the following variable to be set. | |
148 | */ | |
149 | static bool old_suspend_ordering; | |
150 | ||
151 | void __init acpi_old_suspend_ordering(void) | |
152 | { | |
153 | old_suspend_ordering = true; | |
154 | } | |
155 | ||
0ac1b1d7 ZR |
156 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
157 | { | |
158 | acpi_old_suspend_ordering(); | |
159 | return 0; | |
160 | } | |
161 | ||
162 | static int __init init_nvs_nosave(const struct dmi_system_id *d) | |
163 | { | |
164 | acpi_nvs_nosave(); | |
165 | return 0; | |
166 | } | |
167 | ||
068b47d0 | 168 | static bool acpi_sleep_default_s3; |
71630b7a | 169 | |
068b47d0 | 170 | static int __init init_default_s3(const struct dmi_system_id *d) |
71630b7a | 171 | { |
068b47d0 | 172 | acpi_sleep_default_s3 = true; |
71630b7a RW |
173 | return 0; |
174 | } | |
175 | ||
6faadbbb | 176 | static const struct dmi_system_id acpisleep_dmi_table[] __initconst = { |
0ac1b1d7 ZR |
177 | { |
178 | .callback = init_old_suspend_ordering, | |
179 | .ident = "Abit KN9 (nForce4 variant)", | |
180 | .matches = { | |
181 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
182 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
183 | }, | |
184 | }, | |
185 | { | |
186 | .callback = init_old_suspend_ordering, | |
187 | .ident = "HP xw4600 Workstation", | |
188 | .matches = { | |
189 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
190 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
191 | }, | |
192 | }, | |
193 | { | |
194 | .callback = init_old_suspend_ordering, | |
195 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
196 | .matches = { | |
197 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
198 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
199 | }, | |
200 | }, | |
201 | { | |
202 | .callback = init_old_suspend_ordering, | |
203 | .ident = "Panasonic CF51-2L", | |
204 | .matches = { | |
205 | DMI_MATCH(DMI_BOARD_VENDOR, | |
206 | "Matsushita Electric Industrial Co.,Ltd."), | |
207 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
208 | }, | |
209 | }, | |
210 | { | |
211 | .callback = init_nvs_nosave, | |
66f2fda9 JS |
212 | .ident = "Sony Vaio VGN-FW41E_H", |
213 | .matches = { | |
214 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
215 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"), | |
216 | }, | |
217 | }, | |
218 | { | |
219 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
220 | .ident = "Sony Vaio VGN-FW21E", |
221 | .matches = { | |
222 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
223 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
224 | }, | |
225 | }, | |
226 | { | |
227 | .callback = init_nvs_nosave, | |
469dd1c4 FV |
228 | .ident = "Sony Vaio VGN-FW21M", |
229 | .matches = { | |
230 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
231 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"), | |
232 | }, | |
233 | }, | |
234 | { | |
235 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
236 | .ident = "Sony Vaio VPCEB17FX", |
237 | .matches = { | |
238 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
239 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
240 | }, | |
241 | }, | |
242 | { | |
243 | .callback = init_nvs_nosave, | |
244 | .ident = "Sony Vaio VGN-SR11M", | |
245 | .matches = { | |
246 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
247 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
248 | }, | |
249 | }, | |
250 | { | |
251 | .callback = init_nvs_nosave, | |
252 | .ident = "Everex StepNote Series", | |
253 | .matches = { | |
254 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
255 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
256 | }, | |
257 | }, | |
258 | { | |
259 | .callback = init_nvs_nosave, | |
260 | .ident = "Sony Vaio VPCEB1Z1E", | |
261 | .matches = { | |
262 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
263 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
264 | }, | |
265 | }, | |
266 | { | |
267 | .callback = init_nvs_nosave, | |
268 | .ident = "Sony Vaio VGN-NW130D", | |
269 | .matches = { | |
270 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
271 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
272 | }, | |
273 | }, | |
274 | { | |
275 | .callback = init_nvs_nosave, | |
276 | .ident = "Sony Vaio VPCCW29FX", | |
277 | .matches = { | |
278 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
279 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
280 | }, | |
281 | }, | |
282 | { | |
283 | .callback = init_nvs_nosave, | |
284 | .ident = "Averatec AV1020-ED2", | |
285 | .matches = { | |
286 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
287 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
288 | }, | |
289 | }, | |
290 | { | |
291 | .callback = init_old_suspend_ordering, | |
292 | .ident = "Asus A8N-SLI DELUXE", | |
293 | .matches = { | |
294 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
295 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
296 | }, | |
297 | }, | |
298 | { | |
299 | .callback = init_old_suspend_ordering, | |
300 | .ident = "Asus A8N-SLI Premium", | |
301 | .matches = { | |
302 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
303 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
304 | }, | |
305 | }, | |
306 | { | |
307 | .callback = init_nvs_nosave, | |
308 | .ident = "Sony Vaio VGN-SR26GN_P", | |
309 | .matches = { | |
310 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
311 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
312 | }, | |
313 | }, | |
314 | { | |
315 | .callback = init_nvs_nosave, | |
316 | .ident = "Sony Vaio VPCEB1S1E", | |
317 | .matches = { | |
318 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
319 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), | |
320 | }, | |
321 | }, | |
322 | { | |
323 | .callback = init_nvs_nosave, | |
324 | .ident = "Sony Vaio VGN-FW520F", | |
325 | .matches = { | |
326 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
327 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
328 | }, | |
329 | }, | |
330 | { | |
331 | .callback = init_nvs_nosave, | |
332 | .ident = "Asus K54C", | |
333 | .matches = { | |
334 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
335 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
336 | }, | |
337 | }, | |
338 | { | |
339 | .callback = init_nvs_nosave, | |
340 | .ident = "Asus K54HR", | |
341 | .matches = { | |
342 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
343 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
344 | }, | |
345 | }, | |
231f9415 WT |
346 | { |
347 | .callback = init_nvs_save_s3, | |
348 | .ident = "Asus 1025C", | |
349 | .matches = { | |
350 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
351 | DMI_MATCH(DMI_PRODUCT_NAME, "1025C"), | |
352 | }, | |
353 | }, | |
cbc00c13 ZR |
354 | /* |
355 | * https://bugzilla.kernel.org/show_bug.cgi?id=189431 | |
356 | * Lenovo G50-45 is a platform later than 2012, but needs nvs memory | |
357 | * saving during S3. | |
358 | */ | |
359 | { | |
360 | .callback = init_nvs_save_s3, | |
361 | .ident = "Lenovo G50-45", | |
362 | .matches = { | |
363 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
364 | DMI_MATCH(DMI_PRODUCT_NAME, "80E3"), | |
365 | }, | |
366 | }, | |
855c1c2f CY |
367 | /* |
368 | * ThinkPad X1 Tablet(2016) cannot do suspend-to-idle using | |
369 | * the Low Power S0 Idle firmware interface (see | |
370 | * https://bugzilla.kernel.org/show_bug.cgi?id=199057). | |
371 | */ | |
372 | { | |
068b47d0 | 373 | .callback = init_default_s3, |
855c1c2f CY |
374 | .ident = "ThinkPad X1 Tablet(2016)", |
375 | .matches = { | |
376 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
377 | DMI_MATCH(DMI_PRODUCT_NAME, "20GGA00L00"), | |
378 | }, | |
379 | }, | |
0ac1b1d7 ZR |
380 | {}, |
381 | }; | |
382 | ||
57044031 RW |
383 | static bool ignore_blacklist; |
384 | ||
385 | void __init acpi_sleep_no_blacklist(void) | |
386 | { | |
387 | ignore_blacklist = true; | |
388 | } | |
389 | ||
8b691c9c | 390 | static void __init acpi_sleep_dmi_check(void) |
0ac1b1d7 | 391 | { |
57044031 RW |
392 | if (ignore_blacklist) |
393 | return; | |
394 | ||
9c0a30b6 | 395 | if (dmi_get_bios_year() >= 2012) |
821d6f03 LT |
396 | acpi_nvs_nosave_s3(); |
397 | ||
0ac1b1d7 ZR |
398 | dmi_check_system(acpisleep_dmi_table); |
399 | } | |
400 | ||
d8f3de0d | 401 | /** |
d5a64513 | 402 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 403 | */ |
d5a64513 | 404 | static int acpi_pm_freeze(void) |
d8f3de0d | 405 | { |
3d97e426 | 406 | acpi_disable_all_gpes(); |
bd6f10a5 | 407 | acpi_os_wait_events_complete(); |
fe955682 | 408 | acpi_ec_block_transactions(); |
d8f3de0d RW |
409 | return 0; |
410 | } | |
411 | ||
c5f7a1bb RW |
412 | /** |
413 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
414 | */ | |
415 | static int acpi_pm_pre_suspend(void) | |
416 | { | |
417 | acpi_pm_freeze(); | |
26fcaf60 | 418 | return suspend_nvs_save(); |
c5f7a1bb RW |
419 | } |
420 | ||
d8f3de0d RW |
421 | /** |
422 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
423 | * | |
424 | * If necessary, set the firmware waking vector and do arch-specific | |
425 | * nastiness to get the wakeup code to the waking vector. | |
426 | */ | |
427 | static int __acpi_pm_prepare(void) | |
428 | { | |
429 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
430 | if (error) |
431 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 432 | |
d8f3de0d RW |
433 | return error; |
434 | } | |
435 | ||
436 | /** | |
437 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
438 | * state and disable the GPEs. | |
439 | */ | |
440 | static int acpi_pm_prepare(void) | |
441 | { | |
442 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 443 | if (!error) |
26fcaf60 | 444 | error = acpi_pm_pre_suspend(); |
d5a64513 | 445 | |
d8f3de0d RW |
446 | return error; |
447 | } | |
448 | ||
449 | /** | |
450 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
451 | * | |
452 | * This is called after we wake back up (or if entering the sleep state | |
453 | * failed). | |
454 | */ | |
455 | static void acpi_pm_finish(void) | |
456 | { | |
a3487d8f | 457 | struct acpi_device *pwr_btn_adev; |
d8f3de0d RW |
458 | u32 acpi_state = acpi_target_sleep_state; |
459 | ||
42de5532 | 460 | acpi_ec_unblock_transactions(); |
d551d81d | 461 | suspend_nvs_free(); |
2a6b6976 | 462 | |
d8f3de0d RW |
463 | if (acpi_state == ACPI_STATE_S0) |
464 | return; | |
1da177e4 | 465 | |
d8f3de0d RW |
466 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
467 | acpi_state); | |
78f5f023 | 468 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
469 | acpi_leave_sleep_state(acpi_state); |
470 | ||
471 | /* reset firmware waking vector */ | |
e3e9b577 | 472 | acpi_set_waking_vector(0); |
d8f3de0d RW |
473 | |
474 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c10d7a13 | 475 | |
781d737c RW |
476 | acpi_resume_power_resources(); |
477 | ||
c10d7a13 DD |
478 | /* If we were woken with the fixed power button, provide a small |
479 | * hint to userspace in the form of a wakeup event on the fixed power | |
480 | * button device (if it can be found). | |
481 | * | |
482 | * We delay the event generation til now, as the PM layer requires | |
483 | * timekeeping to be running before we generate events. */ | |
484 | if (!pwr_btn_event_pending) | |
485 | return; | |
486 | ||
487 | pwr_btn_event_pending = false; | |
a3487d8f AS |
488 | pwr_btn_adev = acpi_dev_get_first_match_dev(ACPI_BUTTON_HID_POWERF, |
489 | NULL, -1); | |
490 | if (pwr_btn_adev) { | |
491 | pm_wakeup_event(&pwr_btn_adev->dev, 0); | |
492 | acpi_dev_put(pwr_btn_adev); | |
c10d7a13 | 493 | } |
d8f3de0d RW |
494 | } |
495 | ||
496 | /** | |
ad07277e RW |
497 | * acpi_pm_start - Start system PM transition. |
498 | */ | |
499 | static void acpi_pm_start(u32 acpi_state) | |
500 | { | |
501 | acpi_target_sleep_state = acpi_state; | |
502 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
503 | acpi_scan_lock_acquire(); | |
504 | } | |
505 | ||
506 | /** | |
507 | * acpi_pm_end - Finish up system PM transition. | |
d8f3de0d RW |
508 | */ |
509 | static void acpi_pm_end(void) | |
510 | { | |
8ece1d83 | 511 | acpi_turn_off_unused_power_resources(); |
ad07277e | 512 | acpi_scan_lock_release(); |
d8f3de0d RW |
513 | /* |
514 | * This is necessary in case acpi_pm_finish() is not called during a | |
515 | * failing transition to a sleep state. | |
516 | */ | |
517 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 518 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 519 | } |
92daa7b5 | 520 | #else /* !CONFIG_ACPI_SLEEP */ |
068b47d0 | 521 | #define sleep_no_lps0 (1) |
92daa7b5 | 522 | #define acpi_target_sleep_state ACPI_STATE_S0 |
068b47d0 | 523 | #define acpi_sleep_default_s3 (1) |
0ac1b1d7 | 524 | static inline void acpi_sleep_dmi_check(void) {} |
5d1e072b | 525 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 526 | |
d8f3de0d | 527 | #ifdef CONFIG_SUSPEND |
1da177e4 | 528 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
529 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
530 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
531 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 532 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
533 | }; |
534 | ||
e9b3aba8 | 535 | /** |
2c6e33c3 | 536 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
537 | * associated with given @pm_state, if supported. |
538 | */ | |
2c6e33c3 | 539 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
540 | { |
541 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
ad07277e | 542 | int error; |
e9b3aba8 | 543 | |
1bad2f19 | 544 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
545 | if (error) |
546 | return error; | |
547 | ||
ad07277e RW |
548 | if (!sleep_states[acpi_state]) { |
549 | pr_err("ACPI does not support sleep state S%u\n", acpi_state); | |
550 | return -ENOSYS; | |
e9b3aba8 | 551 | } |
ef25ba04 RW |
552 | if (acpi_state > ACPI_STATE_S1) |
553 | pm_set_suspend_via_firmware(); | |
ad07277e RW |
554 | |
555 | acpi_pm_start(acpi_state); | |
556 | return 0; | |
e9b3aba8 RW |
557 | } |
558 | ||
1da177e4 | 559 | /** |
2c6e33c3 | 560 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 561 | * @pm_state: ignored |
1da177e4 | 562 | * |
50ad147a RW |
563 | * Flush caches and go to sleep. For STR we have to call arch-specific |
564 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
565 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
566 | */ | |
2c6e33c3 | 567 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
568 | { |
569 | acpi_status status = AE_OK; | |
e9b3aba8 | 570 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 571 | int error; |
1da177e4 LT |
572 | |
573 | ACPI_FLUSH_CPU_CACHE(); | |
574 | ||
bb3632c6 | 575 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true); |
e9b3aba8 RW |
576 | switch (acpi_state) { |
577 | case ACPI_STATE_S1: | |
1da177e4 | 578 | barrier(); |
3f6f49c7 | 579 | status = acpi_enter_sleep_state(acpi_state); |
1da177e4 LT |
580 | break; |
581 | ||
e9b3aba8 | 582 | case ACPI_STATE_S3: |
d6a77ead KRW |
583 | if (!acpi_suspend_lowlevel) |
584 | return -ENOSYS; | |
f1a2003e | 585 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
586 | if (error) |
587 | return error; | |
7a63f08b | 588 | pr_info(PREFIX "Low-level resume complete\n"); |
ef25ba04 | 589 | pm_set_resume_via_firmware(); |
1da177e4 | 590 | break; |
1da177e4 | 591 | } |
bb3632c6 | 592 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false); |
872d83d0 | 593 | |
b6dacf63 MG |
594 | /* This violates the spec but is required for bug compatibility. */ |
595 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 596 | |
3f6f49c7 LB |
597 | /* Reprogram control registers */ |
598 | acpi_leave_sleep_state_prep(acpi_state); | |
c95d47a8 | 599 | |
23b168d4 | 600 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
601 | * of the OSPM to clear the status bit [ implying that the |
602 | * POWER_BUTTON event should not reach userspace ] | |
c10d7a13 DD |
603 | * |
604 | * However, we do generate a small hint for userspace in the form of | |
605 | * a wakeup event. We flag this condition for now and generate the | |
606 | * event later, as we're currently too early in resume to be able to | |
607 | * generate wakeup events. | |
872d83d0 | 608 | */ |
c10d7a13 | 609 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
51468a9d | 610 | acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED; |
c10d7a13 DD |
611 | |
612 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); | |
613 | ||
18864cc4 | 614 | if (pwr_btn_status & ACPI_EVENT_FLAG_STATUS_SET) { |
c10d7a13 DD |
615 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); |
616 | /* Flag for later */ | |
617 | pwr_btn_event_pending = true; | |
618 | } | |
619 | } | |
872d83d0 | 620 | |
a3627f67 SL |
621 | /* |
622 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
623 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
624 | * acpi_leave_sleep_state will reenable specific GPEs later | |
625 | */ | |
3d97e426 | 626 | acpi_disable_all_gpes(); |
d5a64513 | 627 | /* Allow EC transactions to happen. */ |
c2b46d67 | 628 | acpi_ec_unblock_transactions(); |
a3627f67 | 629 | |
2a6b6976 MG |
630 | suspend_nvs_restore(); |
631 | ||
1da177e4 LT |
632 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
633 | } | |
634 | ||
2c6e33c3 | 635 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 636 | { |
e8c9c502 | 637 | u32 acpi_state; |
eb9289eb | 638 | |
e8c9c502 JB |
639 | switch (pm_state) { |
640 | case PM_SUSPEND_ON: | |
641 | case PM_SUSPEND_STANDBY: | |
642 | case PM_SUSPEND_MEM: | |
643 | acpi_state = acpi_suspend_states[pm_state]; | |
644 | ||
645 | return sleep_states[acpi_state]; | |
646 | default: | |
647 | return 0; | |
648 | } | |
eb9289eb SL |
649 | } |
650 | ||
2f55ac07 | 651 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
652 | .valid = acpi_suspend_state_valid, |
653 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 654 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 655 | .enter = acpi_suspend_enter, |
618d7fd0 | 656 | .wake = acpi_pm_finish, |
d8f3de0d RW |
657 | .end = acpi_pm_end, |
658 | }; | |
659 | ||
660 | /** | |
661 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
662 | * state associated with given @pm_state, if supported, and | |
663 | * execute the _PTS control method. This function is used if the | |
664 | * pre-ACPI 2.0 suspend ordering has been requested. | |
665 | */ | |
666 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
667 | { | |
668 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
669 | if (!error) |
670 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 671 | |
d8f3de0d RW |
672 | return error; |
673 | } | |
674 | ||
675 | /* | |
676 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
677 | * been requested. | |
678 | */ | |
2f55ac07 | 679 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
680 | .valid = acpi_suspend_state_valid, |
681 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 682 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 683 | .enter = acpi_suspend_enter, |
618d7fd0 | 684 | .wake = acpi_pm_finish, |
d8f3de0d RW |
685 | .end = acpi_pm_end, |
686 | .recover = acpi_pm_finish, | |
1da177e4 | 687 | }; |
02040f0b | 688 | |
33e4f80e RW |
689 | static bool s2idle_wakeup; |
690 | ||
8110dd28 RW |
691 | /* |
692 | * On platforms supporting the Low Power S0 Idle interface there is an ACPI | |
693 | * device object with the PNP0D80 compatible device ID (System Power Management | |
694 | * Controller) and a specific _DSM method under it. That method, if present, | |
695 | * can be used to indicate to the platform that the OS is transitioning into a | |
696 | * low-power state in which certain types of activity are not desirable or that | |
697 | * it is leaving such a state, which allows the platform to adjust its operation | |
698 | * mode accordingly. | |
699 | */ | |
700 | static const struct acpi_device_id lps0_device_ids[] = { | |
701 | {"PNP0D80", }, | |
702 | {"", }, | |
703 | }; | |
704 | ||
705 | #define ACPI_LPS0_DSM_UUID "c4eb40a0-6cd2-11e2-bcfd-0800200c9a66" | |
706 | ||
726fb6b4 | 707 | #define ACPI_LPS0_GET_DEVICE_CONSTRAINTS 1 |
8110dd28 RW |
708 | #define ACPI_LPS0_SCREEN_OFF 3 |
709 | #define ACPI_LPS0_SCREEN_ON 4 | |
710 | #define ACPI_LPS0_ENTRY 5 | |
711 | #define ACPI_LPS0_EXIT 6 | |
712 | ||
8110dd28 RW |
713 | static acpi_handle lps0_device_handle; |
714 | static guid_t lps0_dsm_guid; | |
715 | static char lps0_dsm_func_mask; | |
716 | ||
726fb6b4 SP |
717 | /* Device constraint entry structure */ |
718 | struct lpi_device_info { | |
719 | char *name; | |
720 | int enabled; | |
721 | union acpi_object *package; | |
722 | }; | |
723 | ||
724 | /* Constraint package structure */ | |
725 | struct lpi_device_constraint { | |
726 | int uid; | |
727 | int min_dstate; | |
728 | int function_states; | |
729 | }; | |
730 | ||
731 | struct lpi_constraints { | |
732 | acpi_handle handle; | |
733 | int min_dstate; | |
734 | }; | |
735 | ||
736 | static struct lpi_constraints *lpi_constraints_table; | |
737 | static int lpi_constraints_table_size; | |
738 | ||
739 | static void lpi_device_get_constraints(void) | |
740 | { | |
741 | union acpi_object *out_obj; | |
742 | int i; | |
743 | ||
744 | out_obj = acpi_evaluate_dsm_typed(lps0_device_handle, &lps0_dsm_guid, | |
745 | 1, ACPI_LPS0_GET_DEVICE_CONSTRAINTS, | |
746 | NULL, ACPI_TYPE_PACKAGE); | |
747 | ||
748 | acpi_handle_debug(lps0_device_handle, "_DSM function 1 eval %s\n", | |
749 | out_obj ? "successful" : "failed"); | |
750 | ||
751 | if (!out_obj) | |
752 | return; | |
753 | ||
754 | lpi_constraints_table = kcalloc(out_obj->package.count, | |
755 | sizeof(*lpi_constraints_table), | |
756 | GFP_KERNEL); | |
757 | if (!lpi_constraints_table) | |
758 | goto free_acpi_buffer; | |
759 | ||
760 | acpi_handle_debug(lps0_device_handle, "LPI: constraints list begin:\n"); | |
761 | ||
762 | for (i = 0; i < out_obj->package.count; i++) { | |
763 | struct lpi_constraints *constraint; | |
764 | acpi_status status; | |
765 | union acpi_object *package = &out_obj->package.elements[i]; | |
766 | struct lpi_device_info info = { }; | |
767 | int package_count = 0, j; | |
768 | ||
769 | if (!package) | |
770 | continue; | |
771 | ||
772 | for (j = 0; j < package->package.count; ++j) { | |
773 | union acpi_object *element = | |
774 | &(package->package.elements[j]); | |
775 | ||
776 | switch (element->type) { | |
777 | case ACPI_TYPE_INTEGER: | |
778 | info.enabled = element->integer.value; | |
779 | break; | |
780 | case ACPI_TYPE_STRING: | |
781 | info.name = element->string.pointer; | |
782 | break; | |
783 | case ACPI_TYPE_PACKAGE: | |
784 | package_count = element->package.count; | |
785 | info.package = element->package.elements; | |
786 | break; | |
787 | } | |
788 | } | |
789 | ||
790 | if (!info.enabled || !info.package || !info.name) | |
791 | continue; | |
792 | ||
793 | constraint = &lpi_constraints_table[lpi_constraints_table_size]; | |
794 | ||
795 | status = acpi_get_handle(NULL, info.name, &constraint->handle); | |
796 | if (ACPI_FAILURE(status)) | |
797 | continue; | |
798 | ||
799 | acpi_handle_debug(lps0_device_handle, | |
800 | "index:%d Name:%s\n", i, info.name); | |
801 | ||
802 | constraint->min_dstate = -1; | |
803 | ||
804 | for (j = 0; j < package_count; ++j) { | |
805 | union acpi_object *info_obj = &info.package[j]; | |
806 | union acpi_object *cnstr_pkg; | |
807 | union acpi_object *obj; | |
808 | struct lpi_device_constraint dev_info; | |
809 | ||
810 | switch (info_obj->type) { | |
811 | case ACPI_TYPE_INTEGER: | |
812 | /* version */ | |
813 | break; | |
814 | case ACPI_TYPE_PACKAGE: | |
815 | if (info_obj->package.count < 2) | |
816 | break; | |
817 | ||
818 | cnstr_pkg = info_obj->package.elements; | |
819 | obj = &cnstr_pkg[0]; | |
820 | dev_info.uid = obj->integer.value; | |
821 | obj = &cnstr_pkg[1]; | |
822 | dev_info.min_dstate = obj->integer.value; | |
823 | ||
824 | acpi_handle_debug(lps0_device_handle, | |
825 | "uid:%d min_dstate:%s\n", | |
826 | dev_info.uid, | |
827 | acpi_power_state_string(dev_info.min_dstate)); | |
828 | ||
829 | constraint->min_dstate = dev_info.min_dstate; | |
830 | break; | |
831 | } | |
832 | } | |
833 | ||
834 | if (constraint->min_dstate < 0) { | |
835 | acpi_handle_debug(lps0_device_handle, | |
836 | "Incomplete constraint defined\n"); | |
837 | continue; | |
838 | } | |
839 | ||
840 | lpi_constraints_table_size++; | |
841 | } | |
842 | ||
843 | acpi_handle_debug(lps0_device_handle, "LPI: constraints list end\n"); | |
844 | ||
845 | free_acpi_buffer: | |
846 | ACPI_FREE(out_obj); | |
847 | } | |
848 | ||
849 | static void lpi_check_constraints(void) | |
850 | { | |
851 | int i; | |
852 | ||
853 | for (i = 0; i < lpi_constraints_table_size; ++i) { | |
fa54150a | 854 | acpi_handle handle = lpi_constraints_table[i].handle; |
726fb6b4 SP |
855 | struct acpi_device *adev; |
856 | ||
fa54150a | 857 | if (!handle || acpi_bus_get_device(handle, &adev)) |
726fb6b4 SP |
858 | continue; |
859 | ||
fa54150a | 860 | acpi_handle_debug(handle, |
726fb6b4 SP |
861 | "LPI: required min power state:%s current power state:%s\n", |
862 | acpi_power_state_string(lpi_constraints_table[i].min_dstate), | |
863 | acpi_power_state_string(adev->power.state)); | |
864 | ||
865 | if (!adev->flags.power_manageable) { | |
fa54150a RW |
866 | acpi_handle_info(handle, "LPI: Device not power manageable\n"); |
867 | lpi_constraints_table[i].handle = NULL; | |
726fb6b4 SP |
868 | continue; |
869 | } | |
870 | ||
871 | if (adev->power.state < lpi_constraints_table[i].min_dstate) | |
fa54150a | 872 | acpi_handle_info(handle, |
726fb6b4 SP |
873 | "LPI: Constraint not met; min power state:%s current power state:%s\n", |
874 | acpi_power_state_string(lpi_constraints_table[i].min_dstate), | |
875 | acpi_power_state_string(adev->power.state)); | |
876 | } | |
877 | } | |
878 | ||
8110dd28 RW |
879 | static void acpi_sleep_run_lps0_dsm(unsigned int func) |
880 | { | |
881 | union acpi_object *out_obj; | |
882 | ||
883 | if (!(lps0_dsm_func_mask & (1 << func))) | |
884 | return; | |
885 | ||
886 | out_obj = acpi_evaluate_dsm(lps0_device_handle, &lps0_dsm_guid, 1, func, NULL); | |
887 | ACPI_FREE(out_obj); | |
888 | ||
889 | acpi_handle_debug(lps0_device_handle, "_DSM function %u evaluation %s\n", | |
890 | func, out_obj ? "successful" : "failed"); | |
891 | } | |
892 | ||
893 | static int lps0_device_attach(struct acpi_device *adev, | |
894 | const struct acpi_device_id *not_used) | |
895 | { | |
896 | union acpi_object *out_obj; | |
897 | ||
898 | if (lps0_device_handle) | |
899 | return 0; | |
900 | ||
901 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) | |
902 | return 0; | |
903 | ||
904 | guid_parse(ACPI_LPS0_DSM_UUID, &lps0_dsm_guid); | |
905 | /* Check if the _DSM is present and as expected. */ | |
906 | out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 1, 0, NULL); | |
2e2c2fdc | 907 | if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER) { |
8110dd28 RW |
908 | acpi_handle_debug(adev->handle, |
909 | "_DSM function 0 evaluation failed\n"); | |
2e2c2fdc | 910 | return 0; |
8110dd28 | 911 | } |
2e2c2fdc RW |
912 | |
913 | lps0_dsm_func_mask = *(char *)out_obj->buffer.pointer; | |
914 | ||
8110dd28 | 915 | ACPI_FREE(out_obj); |
726fb6b4 | 916 | |
2e2c2fdc RW |
917 | acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n", |
918 | lps0_dsm_func_mask); | |
919 | ||
920 | lps0_device_handle = adev->handle; | |
921 | ||
726fb6b4 SP |
922 | lpi_device_get_constraints(); |
923 | ||
2e2c2fdc RW |
924 | /* |
925 | * Use suspend-to-idle by default if the default suspend mode was not | |
926 | * set from the command line. | |
927 | */ | |
068b47d0 | 928 | if (mem_sleep_default > PM_SUSPEND_MEM && !acpi_sleep_default_s3) |
2e2c2fdc RW |
929 | mem_sleep_current = PM_SUSPEND_TO_IDLE; |
930 | ||
b90ff355 RW |
931 | /* |
932 | * Some LPS0 systems, like ASUS Zenbook UX430UNR/i7-8550U, require the | |
933 | * EC GPE to be enabled while suspended for certain wakeup devices to | |
934 | * work, so mark it as wakeup-capable. | |
935 | */ | |
936 | acpi_ec_mark_gpe_for_wake(); | |
937 | ||
8110dd28 RW |
938 | return 0; |
939 | } | |
940 | ||
941 | static struct acpi_scan_handler lps0_handler = { | |
942 | .ids = lps0_device_ids, | |
943 | .attach = lps0_device_attach, | |
944 | }; | |
945 | ||
23d5855f | 946 | static int acpi_s2idle_begin(void) |
1f0b6386 RW |
947 | { |
948 | acpi_scan_lock_acquire(); | |
949 | return 0; | |
950 | } | |
951 | ||
23d5855f | 952 | static int acpi_s2idle_prepare(void) |
a8d46b9e | 953 | { |
b90ff355 | 954 | if (acpi_sci_irq_valid()) { |
8c01275e | 955 | enable_irq_wake(acpi_sci_irq); |
b90ff355 RW |
956 | acpi_ec_set_gpe_wake_mask(ACPI_GPE_ENABLE); |
957 | } | |
235d81a6 | 958 | |
2f844b61 RJ |
959 | acpi_enable_wakeup_devices(ACPI_STATE_S0); |
960 | ||
f941d3e4 RW |
961 | /* Change the configuration of GPEs to avoid spurious wakeup. */ |
962 | acpi_enable_all_wakeup_gpes(); | |
963 | acpi_os_wait_events_complete(); | |
41275eb5 RW |
964 | |
965 | s2idle_wakeup = true; | |
a8d46b9e RW |
966 | return 0; |
967 | } | |
968 | ||
ac9eafbe | 969 | static int acpi_s2idle_prepare_late(void) |
33e4f80e | 970 | { |
ac9eafbe RW |
971 | if (!lps0_device_handle || sleep_no_lps0) |
972 | return 0; | |
973 | ||
974 | if (pm_debug_messages_on) | |
726fb6b4 SP |
975 | lpi_check_constraints(); |
976 | ||
ac9eafbe RW |
977 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF); |
978 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY); | |
979 | ||
980 | return 0; | |
981 | } | |
982 | ||
e3728b50 | 983 | static bool acpi_s2idle_wake(void) |
ac9eafbe | 984 | { |
e3728b50 RW |
985 | if (!acpi_sci_irq_valid()) |
986 | return pm_wakeup_pending(); | |
987 | ||
988 | while (pm_wakeup_pending()) { | |
989 | /* | |
990 | * If IRQD_WAKEUP_ARMED is set for the SCI at this point, the | |
991 | * SCI has not triggered while suspended, so bail out (the | |
992 | * wakeup is pending anyway and the SCI is not the source of | |
993 | * it). | |
994 | */ | |
995 | if (irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq))) | |
996 | return true; | |
997 | ||
63fb9623 RW |
998 | /* |
999 | * If the status bit of any enabled fixed event is set, the | |
1000 | * wakeup is regarded as valid. | |
1001 | */ | |
1002 | if (acpi_any_fixed_event_status_set()) | |
1003 | return true; | |
1004 | ||
ddfd9dcf HG |
1005 | /* Check wakeups from drivers sharing the SCI. */ |
1006 | if (acpi_check_wakeup_handlers()) | |
1007 | return true; | |
1008 | ||
7b301750 RW |
1009 | /* Check non-EC GPE wakeups and dispatch the EC GPE. */ |
1010 | if (acpi_ec_dispatch_gpe()) | |
e3728b50 | 1011 | return true; |
56b99184 | 1012 | |
56b99184 | 1013 | /* |
607b9df6 | 1014 | * Cancel the SCI wakeup and process all pending events in case |
56b99184 RW |
1015 | * there are any wakeup ones in there. |
1016 | * | |
1017 | * Note that if any non-EC GPEs are active at this point, the | |
1018 | * SCI will retrigger after the rearming below, so no events | |
1019 | * should be missed by canceling the wakeup here. | |
1020 | */ | |
33e4f80e | 1021 | pm_system_cancel_wakeup(); |
607b9df6 | 1022 | acpi_os_wait_events_complete(); |
33e4f80e | 1023 | |
e3728b50 RW |
1024 | /* |
1025 | * The SCI is in the "suspended" state now and it cannot produce | |
1026 | * new wakeup events till the rearming below, so if any of them | |
1027 | * are pending here, they must be resulting from the processing | |
1028 | * of EC events above or coming from somewhere else. | |
1029 | */ | |
1030 | if (pm_wakeup_pending()) | |
1031 | return true; | |
1032 | ||
45dc1576 RW |
1033 | rearm_wake_irq(acpi_sci_irq); |
1034 | } | |
e3728b50 RW |
1035 | |
1036 | return false; | |
33e4f80e RW |
1037 | } |
1038 | ||
ac9eafbe RW |
1039 | static void acpi_s2idle_restore_early(void) |
1040 | { | |
1041 | if (!lps0_device_handle || sleep_no_lps0) | |
1042 | return; | |
1043 | ||
1044 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT); | |
1045 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON); | |
1046 | } | |
1047 | ||
23d5855f | 1048 | static void acpi_s2idle_restore(void) |
a8d46b9e | 1049 | { |
024aa873 RW |
1050 | /* |
1051 | * Drain pending events before restoring the working-state configuration | |
1052 | * of GPEs. | |
1053 | */ | |
1054 | acpi_os_wait_events_complete(); /* synchronize GPE processing */ | |
607b9df6 RW |
1055 | acpi_ec_flush_work(); /* flush the EC driver's workqueues */ |
1056 | acpi_os_wait_events_complete(); /* synchronize Notify handling */ | |
024aa873 | 1057 | |
41275eb5 RW |
1058 | s2idle_wakeup = false; |
1059 | ||
f941d3e4 RW |
1060 | acpi_enable_all_runtime_gpes(); |
1061 | ||
2f844b61 RJ |
1062 | acpi_disable_wakeup_devices(ACPI_STATE_S0); |
1063 | ||
b90ff355 RW |
1064 | if (acpi_sci_irq_valid()) { |
1065 | acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE); | |
8c01275e | 1066 | disable_irq_wake(acpi_sci_irq); |
b90ff355 | 1067 | } |
a8d46b9e RW |
1068 | } |
1069 | ||
23d5855f | 1070 | static void acpi_s2idle_end(void) |
1f0b6386 RW |
1071 | { |
1072 | acpi_scan_lock_release(); | |
1073 | } | |
1074 | ||
23d5855f RW |
1075 | static const struct platform_s2idle_ops acpi_s2idle_ops = { |
1076 | .begin = acpi_s2idle_begin, | |
1077 | .prepare = acpi_s2idle_prepare, | |
ac9eafbe | 1078 | .prepare_late = acpi_s2idle_prepare_late, |
23d5855f | 1079 | .wake = acpi_s2idle_wake, |
ac9eafbe | 1080 | .restore_early = acpi_s2idle_restore_early, |
23d5855f RW |
1081 | .restore = acpi_s2idle_restore, |
1082 | .end = acpi_s2idle_end, | |
1f0b6386 RW |
1083 | }; |
1084 | ||
02040f0b RW |
1085 | static void acpi_sleep_suspend_setup(void) |
1086 | { | |
1087 | int i; | |
1088 | ||
a4e90bed RW |
1089 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) |
1090 | if (acpi_sleep_state_supported(i)) | |
02040f0b | 1091 | sleep_states[i] = 1; |
02040f0b RW |
1092 | |
1093 | suspend_set_ops(old_suspend_ordering ? | |
1094 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
8110dd28 RW |
1095 | |
1096 | acpi_scan_add_handler(&lps0_handler); | |
23d5855f | 1097 | s2idle_set_ops(&acpi_s2idle_ops); |
02040f0b | 1098 | } |
1f0b6386 | 1099 | |
02040f0b | 1100 | #else /* !CONFIG_SUSPEND */ |
8110dd28 RW |
1101 | #define s2idle_wakeup (false) |
1102 | #define lps0_device_handle (NULL) | |
02040f0b RW |
1103 | static inline void acpi_sleep_suspend_setup(void) {} |
1104 | #endif /* !CONFIG_SUSPEND */ | |
296699de | 1105 | |
33e4f80e RW |
1106 | bool acpi_s2idle_wakeup(void) |
1107 | { | |
1108 | return s2idle_wakeup; | |
1109 | } | |
1110 | ||
504997cf SH |
1111 | #ifdef CONFIG_PM_SLEEP |
1112 | static u32 saved_bm_rld; | |
1113 | ||
1114 | static int acpi_save_bm_rld(void) | |
1115 | { | |
1116 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld); | |
1117 | return 0; | |
1118 | } | |
1119 | ||
1120 | static void acpi_restore_bm_rld(void) | |
1121 | { | |
1122 | u32 resumed_bm_rld = 0; | |
1123 | ||
1124 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld); | |
1125 | if (resumed_bm_rld == saved_bm_rld) | |
1126 | return; | |
1127 | ||
1128 | acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld); | |
1129 | } | |
1130 | ||
1131 | static struct syscore_ops acpi_sleep_syscore_ops = { | |
1132 | .suspend = acpi_save_bm_rld, | |
1133 | .resume = acpi_restore_bm_rld, | |
1134 | }; | |
1135 | ||
a042e0c6 | 1136 | static void acpi_sleep_syscore_init(void) |
504997cf SH |
1137 | { |
1138 | register_syscore_ops(&acpi_sleep_syscore_ops); | |
1139 | } | |
1140 | #else | |
1141 | static inline void acpi_sleep_syscore_init(void) {} | |
1142 | #endif /* CONFIG_PM_SLEEP */ | |
1143 | ||
b0cb1a19 | 1144 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
1145 | static unsigned long s4_hardware_signature; |
1146 | static struct acpi_table_facs *facs; | |
1147 | static bool nosigcheck; | |
1148 | ||
1149 | void __init acpi_no_s4_hw_signature(void) | |
1150 | { | |
1151 | nosigcheck = true; | |
1152 | } | |
1153 | ||
bb186901 | 1154 | static int acpi_hibernation_begin(pm_message_t stage) |
74f270af | 1155 | { |
bb186901 RW |
1156 | if (!nvs_nosave) { |
1157 | int error = suspend_nvs_alloc(); | |
1158 | if (error) | |
1159 | return error; | |
1160 | } | |
3f4b0ef7 | 1161 | |
bb186901 RW |
1162 | if (stage.event == PM_EVENT_HIBERNATE) |
1163 | pm_set_suspend_via_firmware(); | |
3f4b0ef7 | 1164 | |
bb186901 RW |
1165 | acpi_pm_start(ACPI_STATE_S4); |
1166 | return 0; | |
3f4b0ef7 RW |
1167 | } |
1168 | ||
a3d25c27 RW |
1169 | static int acpi_hibernation_enter(void) |
1170 | { | |
1171 | acpi_status status = AE_OK; | |
a3d25c27 RW |
1172 | |
1173 | ACPI_FLUSH_CPU_CACHE(); | |
1174 | ||
a3d25c27 | 1175 | /* This shouldn't return. If it returns, we have a problem */ |
3f6f49c7 LB |
1176 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
1177 | /* Reprogram control registers */ | |
1178 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
1179 | |
1180 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
1181 | } | |
1182 | ||
c7e0831d RW |
1183 | static void acpi_hibernation_leave(void) |
1184 | { | |
fbda4b38 | 1185 | pm_set_resume_via_firmware(); |
c7e0831d RW |
1186 | /* |
1187 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
1188 | * enable it here. | |
1189 | */ | |
1190 | acpi_enable(); | |
3f6f49c7 LB |
1191 | /* Reprogram control registers */ |
1192 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c | 1193 | /* Check the hardware signature */ |
5c551e62 ON |
1194 | if (facs && s4_hardware_signature != facs->hardware_signature) |
1195 | pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n"); | |
3f4b0ef7 | 1196 | /* Restore the NVS memory area */ |
dd4c4f17 | 1197 | suspend_nvs_restore(); |
d5a64513 | 1198 | /* Allow EC transactions to happen. */ |
c2b46d67 | 1199 | acpi_ec_unblock_transactions(); |
c7e0831d RW |
1200 | } |
1201 | ||
d5a64513 | 1202 | static void acpi_pm_thaw(void) |
f6bb13aa | 1203 | { |
fe955682 | 1204 | acpi_ec_unblock_transactions(); |
3d97e426 | 1205 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
1206 | } |
1207 | ||
073ef1f6 | 1208 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
1209 | .begin = acpi_hibernation_begin, |
1210 | .end = acpi_pm_end, | |
c5f7a1bb | 1211 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 1212 | .finish = acpi_pm_finish, |
d8f3de0d RW |
1213 | .prepare = acpi_pm_prepare, |
1214 | .enter = acpi_hibernation_enter, | |
1215 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
1216 | .pre_restore = acpi_pm_freeze, |
1217 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 1218 | }; |
caea99ef | 1219 | |
d8f3de0d RW |
1220 | /** |
1221 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
1222 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
1223 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
1224 | * requested. | |
1225 | */ | |
bb186901 | 1226 | static int acpi_hibernation_begin_old(pm_message_t stage) |
a634cc10 | 1227 | { |
e49f711c ZY |
1228 | int error; |
1229 | /* | |
1230 | * The _TTS object should always be evaluated before the _PTS object. | |
1231 | * When the old_suspended_ordering is true, the _PTS object is | |
1232 | * evaluated in the acpi_sleep_prepare. | |
1233 | */ | |
1234 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
1235 | ||
1236 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
bb186901 RW |
1237 | if (error) |
1238 | return error; | |
a634cc10 | 1239 | |
bb186901 RW |
1240 | if (!nvs_nosave) { |
1241 | error = suspend_nvs_alloc(); | |
1242 | if (error) | |
1243 | return error; | |
3f4b0ef7 | 1244 | } |
bb186901 RW |
1245 | |
1246 | if (stage.event == PM_EVENT_HIBERNATE) | |
1247 | pm_set_suspend_via_firmware(); | |
1248 | ||
1249 | acpi_target_sleep_state = ACPI_STATE_S4; | |
1250 | acpi_scan_lock_acquire(); | |
1251 | return 0; | |
3f4b0ef7 RW |
1252 | } |
1253 | ||
d8f3de0d RW |
1254 | /* |
1255 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
1256 | * been requested. | |
1257 | */ | |
073ef1f6 | 1258 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
1259 | .begin = acpi_hibernation_begin_old, |
1260 | .end = acpi_pm_end, | |
c5f7a1bb | 1261 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 1262 | .prepare = acpi_pm_freeze, |
2a6b6976 | 1263 | .finish = acpi_pm_finish, |
a3d25c27 | 1264 | .enter = acpi_hibernation_enter, |
c7e0831d | 1265 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
1266 | .pre_restore = acpi_pm_freeze, |
1267 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 1268 | .recover = acpi_pm_finish, |
a3d25c27 | 1269 | }; |
02040f0b RW |
1270 | |
1271 | static void acpi_sleep_hibernate_setup(void) | |
1272 | { | |
a4e90bed | 1273 | if (!acpi_sleep_state_supported(ACPI_STATE_S4)) |
02040f0b RW |
1274 | return; |
1275 | ||
1276 | hibernation_set_ops(old_suspend_ordering ? | |
1277 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
1278 | sleep_states[ACPI_STATE_S4] = 1; | |
02040f0b RW |
1279 | if (nosigcheck) |
1280 | return; | |
1281 | ||
1282 | acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); | |
1283 | if (facs) | |
1284 | s4_hardware_signature = facs->hardware_signature; | |
1285 | } | |
1286 | #else /* !CONFIG_HIBERNATION */ | |
1287 | static inline void acpi_sleep_hibernate_setup(void) {} | |
1288 | #endif /* !CONFIG_HIBERNATION */ | |
a3d25c27 | 1289 | |
f216cc37 AS |
1290 | static void acpi_power_off_prepare(void) |
1291 | { | |
1292 | /* Prepare to power off the system */ | |
1293 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 1294 | acpi_disable_all_gpes(); |
c52fa70c | 1295 | acpi_os_wait_events_complete(); |
f216cc37 AS |
1296 | } |
1297 | ||
1298 | static void acpi_power_off(void) | |
1299 | { | |
1300 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 1301 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 1302 | local_irq_disable(); |
3f6f49c7 | 1303 | acpi_enter_sleep_state(ACPI_STATE_S5); |
96f15efc LB |
1304 | } |
1305 | ||
aafbcd16 | 1306 | int __init acpi_sleep_init(void) |
1da177e4 | 1307 | { |
ed4cf5b2 JP |
1308 | char supported[ACPI_S_STATE_COUNT * 3 + 1]; |
1309 | char *pos = supported; | |
1310 | int i; | |
1da177e4 | 1311 | |
0ac1b1d7 ZR |
1312 | acpi_sleep_dmi_check(); |
1313 | ||
5a50fe70 | 1314 | sleep_states[ACPI_STATE_S0] = 1; |
5a50fe70 | 1315 | |
504997cf | 1316 | acpi_sleep_syscore_init(); |
02040f0b RW |
1317 | acpi_sleep_suspend_setup(); |
1318 | acpi_sleep_hibernate_setup(); | |
1da177e4 | 1319 | |
a4e90bed | 1320 | if (acpi_sleep_state_supported(ACPI_STATE_S5)) { |
f216cc37 | 1321 | sleep_states[ACPI_STATE_S5] = 1; |
f216cc37 AS |
1322 | pm_power_off_prepare = acpi_power_off_prepare; |
1323 | pm_power_off = acpi_power_off; | |
13737181 CY |
1324 | } else { |
1325 | acpi_no_s5 = true; | |
f216cc37 | 1326 | } |
ed4cf5b2 JP |
1327 | |
1328 | supported[0] = 0; | |
1329 | for (i = 0; i < ACPI_S_STATE_COUNT; i++) { | |
1330 | if (sleep_states[i]) | |
1331 | pos += sprintf(pos, " S%d", i); | |
1332 | } | |
1333 | pr_info(PREFIX "(supports%s)\n", supported); | |
1334 | ||
e49f711c | 1335 | /* |
9713adc2 RW |
1336 | * Register the tts_notifier to reboot notifier list so that the _TTS |
1337 | * object can also be evaluated when the system enters S5. | |
e49f711c | 1338 | */ |
9713adc2 | 1339 | register_reboot_notifier(&tts_notifier); |
1da177e4 LT |
1340 | return 0; |
1341 | } |