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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * sleep.c - ACPI sleep support.
3 *
Alexey Starikovskiye2a5b422005-03-18 16:20:46 -05004 * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com>
6 * Copyright (c) 2000-2003 Patrick Mochel
7 * Copyright (c) 2003 Open Source Development Lab
8 *
9 * This file is released under the GPLv2.
10 *
11 */
12
13#include <linux/delay.h>
14#include <linux/irq.h>
15#include <linux/dmi.h>
16#include <linux/device.h>
Rafael J. Wysockia8d46b92014-09-30 02:29:01 +020017#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/suspend.h>
Zhao Yakuie49f7112008-08-12 10:20:22 +080019#include <linux/reboot.h>
H. Peter Anvind1ee4332011-02-14 15:42:46 -080020#include <linux/acpi.h>
Lin Minga2ef5c42012-03-21 10:58:46 +080021#include <linux/module.h>
Sudeep Holla504997c2016-02-17 12:03:23 +000022#include <linux/syscore_ops.h>
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +040023#include <asm/io.h>
Todd E Brandtbb3632c2014-06-06 05:40:17 -070024#include <trace/events/power.h>
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +040025
Bjorn Helgaase60cc7a2009-03-13 12:08:26 -060026#include "internal.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "sleep.h"
28
Chen Yu13737182016-03-22 08:51:10 +080029/*
30 * Some HW-full platforms do not have _S5, so they may need
31 * to leverage efi power off for a shutdown.
32 */
33bool acpi_no_s5;
Stephen Hemminger01eac602010-10-18 18:47:25 -070034static u8 sleep_states[ACPI_S_STATE_COUNT];
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Zhao Yakuie49f7112008-08-12 10:20:22 +080036static void acpi_sleep_tts_switch(u32 acpi_state)
37{
Jiang Liu0db98202013-06-29 00:24:39 +080038 acpi_status status;
Zhao Yakuie49f7112008-08-12 10:20:22 +080039
Jiang Liu0db98202013-06-29 00:24:39 +080040 status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state);
Zhao Yakuie49f7112008-08-12 10:20:22 +080041 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
42 /*
43 * OS can't evaluate the _TTS object correctly. Some warning
44 * message will be printed. But it won't break anything.
45 */
46 printk(KERN_NOTICE "Failure in evaluating _TTS object\n");
47 }
48}
49
Rafael J. Wysocki9713adc2016-11-21 14:25:49 +010050static int tts_notify_reboot(struct notifier_block *this,
Zhao Yakuie49f7112008-08-12 10:20:22 +080051 unsigned long code, void *x)
52{
53 acpi_sleep_tts_switch(ACPI_STATE_S5);
54 return NOTIFY_DONE;
55}
56
Rafael J. Wysocki9713adc2016-11-21 14:25:49 +010057static struct notifier_block tts_notifier = {
58 .notifier_call = tts_notify_reboot,
Zhao Yakuie49f7112008-08-12 10:20:22 +080059 .next = NULL,
60 .priority = 0,
61};
62
Rafael J. Wysockic9b6c8f2008-01-08 00:10:57 +010063static int acpi_sleep_prepare(u32 acpi_state)
Alexey Starikovskiy2f3f22262007-09-24 14:33:21 +020064{
65#ifdef CONFIG_ACPI_SLEEP
66 /* do we have a wakeup address for S2 and S3? */
67 if (acpi_state == ACPI_STATE_S3) {
H. Peter Anvin319b6ff2012-05-30 12:33:41 +030068 if (!acpi_wakeup_address)
Alexey Starikovskiy2f3f22262007-09-24 14:33:21 +020069 return -EFAULT;
Rafael J. Wysockie3e9b572016-01-04 22:05:20 +010070 acpi_set_waking_vector(acpi_wakeup_address);
Alexey Starikovskiy2f3f22262007-09-24 14:33:21 +020071
72 }
73 ACPI_FLUSH_CPU_CACHE();
Alexey Starikovskiy2f3f22262007-09-24 14:33:21 +020074#endif
Rafael J. Wysockic9b6c8f2008-01-08 00:10:57 +010075 printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
76 acpi_state);
Rafael J. Wysocki78f5f022010-07-06 22:09:38 -040077 acpi_enable_wakeup_devices(acpi_state);
Alexey Starikovskiy2f3f22262007-09-24 14:33:21 +020078 acpi_enter_sleep_state_prep(acpi_state);
79 return 0;
80}
81
Rafael J. Wysockia4e90be2014-03-13 22:11:39 +010082static bool acpi_sleep_state_supported(u8 sleep_state)
83{
84 acpi_status status;
85 u8 type_a, type_b;
86
87 status = acpi_get_sleep_type_data(sleep_state, &type_a, &type_b);
88 return ACPI_SUCCESS(status) && (!acpi_gbl_reduced_hardware
89 || (acpi_gbl_FADT.sleep_control.address
90 && acpi_gbl_FADT.sleep_status.address));
91}
92
Rafael J. Wysocki5d1e0722008-10-22 14:58:43 -040093#ifdef CONFIG_ACPI_SLEEP
Jan Beulich091aad62010-12-07 14:52:25 +000094static u32 acpi_target_sleep_state = ACPI_STATE_S0;
Rafael J. Wysockia6ae7592012-11-02 01:40:53 +010095
96u32 acpi_target_system_state(void)
97{
98 return acpi_target_sleep_state;
99}
Rafael J. Wysockifad16dd2014-05-08 23:22:15 +0200100EXPORT_SYMBOL_GPL(acpi_target_system_state);
Rafael J. Wysockia6ae7592012-11-02 01:40:53 +0100101
Rafael J. Wysockia5ca7342012-07-23 21:01:02 +0200102static bool pwr_btn_event_pending;
Jan Beulich091aad62010-12-07 14:52:25 +0000103
Zhang Ruid7f0eea2009-12-30 15:36:42 +0800104/*
Rafael J. Wysocki72ad5d72010-07-23 22:59:09 +0200105 * The ACPI specification wants us to save NVS memory regions during hibernation
106 * and to restore them during the subsequent resume. Windows does that also for
107 * suspend to RAM. However, it is known that this mechanism does not work on
108 * all machines, so we allow the user to disable it with the help of the
109 * 'acpi_sleep=nonvs' kernel command line option.
110 */
111static bool nvs_nosave;
112
113void __init acpi_nvs_nosave(void)
114{
115 nvs_nosave = true;
116}
117
118/*
Kristen Carlson Accardi1bad2f12012-10-26 13:39:15 +0200119 * The ACPI specification wants us to save NVS memory regions during hibernation
120 * but says nothing about saving NVS during S3. Not all versions of Windows
121 * save NVS on S3 suspend either, and it is clear that not all systems need
122 * NVS to be saved at S3 time. To improve suspend/resume time, allow the
123 * user to disable saving NVS on S3 if their system does not require it, but
124 * continue to save/restore NVS for S4 as specified.
125 */
126static bool nvs_nosave_s3;
127
128void __init acpi_nvs_nosave_s3(void)
129{
130 nvs_nosave_s3 = true;
131}
132
Zhang Ruicbc00c12017-01-16 10:55:45 +0800133static int __init init_nvs_save_s3(const struct dmi_system_id *d)
134{
135 nvs_nosave_s3 = false;
136 return 0;
137}
138
Kristen Carlson Accardi1bad2f12012-10-26 13:39:15 +0200139/*
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200140 * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the
141 * user to request that behavior by using the 'acpi_old_suspend_ordering'
142 * kernel command line option that causes the following variable to be set.
143 */
144static bool old_suspend_ordering;
145
146void __init acpi_old_suspend_ordering(void)
147{
148 old_suspend_ordering = true;
149}
150
Carlos Corbachoe41fb7c2008-07-23 21:28:43 -0700151static int __init init_old_suspend_ordering(const struct dmi_system_id *d)
152{
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100153 acpi_old_suspend_ordering();
Carlos Corbachoe41fb7c2008-07-23 21:28:43 -0700154 return 0;
155}
156
Rafael J. Wysocki53998642010-09-24 16:46:14 -0400157static int __init init_nvs_nosave(const struct dmi_system_id *d)
158{
159 acpi_nvs_nosave();
160 return 0;
161}
162
Rafael J. Wysocki71630b72017-11-06 23:56:57 +0100163static bool acpi_sleep_no_lps0;
164
165static int __init init_no_lps0(const struct dmi_system_id *d)
166{
167 acpi_sleep_no_lps0 = true;
168 return 0;
169}
170
Christoph Hellwig6faadbb2017-09-14 11:59:30 +0200171static const struct dmi_system_id acpisleep_dmi_table[] __initconst = {
Carlos Corbachoe41fb7c2008-07-23 21:28:43 -0700172 {
173 .callback = init_old_suspend_ordering,
174 .ident = "Abit KN9 (nForce4 variant)",
175 .matches = {
176 DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"),
177 DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"),
178 },
179 },
Rafael J. Wysocki4fb507b2008-10-14 22:54:06 +0200180 {
181 .callback = init_old_suspend_ordering,
182 .ident = "HP xw4600 Workstation",
183 .matches = {
184 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
185 DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"),
186 },
187 },
Rafael J. Wysocki65df7842008-11-26 17:53:13 -0500188 {
Andy Whitcrofta1404492009-02-11 18:11:22 +0000189 .callback = init_old_suspend_ordering,
190 .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)",
191 .matches = {
192 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."),
193 DMI_MATCH(DMI_BOARD_NAME, "M2N8L"),
194 },
195 },
Zhang Rui45e77982009-03-15 22:13:44 -0400196 {
Zhao Yakui2a9ef8e2009-03-18 16:36:25 +0800197 .callback = init_old_suspend_ordering,
198 .ident = "Panasonic CF51-2L",
199 .matches = {
200 DMI_MATCH(DMI_BOARD_VENDOR,
201 "Matsushita Electric Industrial Co.,Ltd."),
202 DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"),
203 },
204 },
Rafael J. Wysocki53998642010-09-24 16:46:14 -0400205 {
206 .callback = init_nvs_nosave,
Joseph Salisbury66f2fda2013-02-05 00:16:29 +0000207 .ident = "Sony Vaio VGN-FW41E_H",
208 .matches = {
209 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
210 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"),
211 },
212 },
213 {
214 .callback = init_nvs_nosave,
Dave Jonesd11c78e972011-10-19 23:15:11 +0200215 .ident = "Sony Vaio VGN-FW21E",
216 .matches = {
217 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
218 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"),
219 },
220 },
221 {
222 .callback = init_nvs_nosave,
Fabio Valentini469dd1c2013-03-11 19:16:34 +0000223 .ident = "Sony Vaio VGN-FW21M",
224 .matches = {
225 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
226 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"),
227 },
228 },
229 {
230 .callback = init_nvs_nosave,
Dave Jonesddf6ce42011-11-03 00:58:59 +0100231 .ident = "Sony Vaio VPCEB17FX",
232 .matches = {
233 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
234 DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"),
235 },
236 },
237 {
238 .callback = init_nvs_nosave,
Rafael J. Wysocki53998642010-09-24 16:46:14 -0400239 .ident = "Sony Vaio VGN-SR11M",
240 .matches = {
241 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
242 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"),
243 },
244 },
245 {
246 .callback = init_nvs_nosave,
247 .ident = "Everex StepNote Series",
248 .matches = {
249 DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."),
250 DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"),
251 },
252 },
Rafael J. Wysockiaf489312010-10-17 21:01:21 +0200253 {
254 .callback = init_nvs_nosave,
255 .ident = "Sony Vaio VPCEB1Z1E",
256 .matches = {
257 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
258 DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"),
259 },
260 },
Rafael J. Wysocki291a73c2010-12-12 21:10:42 +0100261 {
262 .callback = init_nvs_nosave,
263 .ident = "Sony Vaio VGN-NW130D",
264 .matches = {
265 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
266 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"),
267 },
268 },
Rafael J. Wysocki7b330702011-01-06 23:37:01 +0100269 {
270 .callback = init_nvs_nosave,
Lan Tianyu93f77082012-01-21 09:23:56 +0800271 .ident = "Sony Vaio VPCCW29FX",
272 .matches = {
273 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
274 DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"),
275 },
276 },
277 {
278 .callback = init_nvs_nosave,
Rafael J. Wysocki7b330702011-01-06 23:37:01 +0100279 .ident = "Averatec AV1020-ED2",
280 .matches = {
281 DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"),
282 DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"),
283 },
284 },
Zhang Ruibb0c5ed2011-07-30 01:40:48 -0400285 {
286 .callback = init_old_suspend_ordering,
287 .ident = "Asus A8N-SLI DELUXE",
288 .matches = {
289 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
290 DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"),
291 },
292 },
293 {
294 .callback = init_old_suspend_ordering,
295 .ident = "Asus A8N-SLI Premium",
296 .matches = {
297 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
298 DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"),
299 },
300 },
Rafael J. Wysocki89e8ea12011-10-06 20:35:03 +0200301 {
302 .callback = init_nvs_nosave,
303 .ident = "Sony Vaio VGN-SR26GN_P",
304 .matches = {
305 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
306 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"),
307 },
308 },
Bogdan Radulescu731b25a2011-10-06 20:35:12 +0200309 {
310 .callback = init_nvs_nosave,
Lan Tianyu876ab792012-11-21 23:12:12 +0100311 .ident = "Sony Vaio VPCEB1S1E",
312 .matches = {
313 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
314 DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"),
315 },
316 },
317 {
318 .callback = init_nvs_nosave,
Bogdan Radulescu731b25a2011-10-06 20:35:12 +0200319 .ident = "Sony Vaio VGN-FW520F",
320 .matches = {
321 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
322 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"),
323 },
324 },
Keng-Yu Lin5a50a7c2011-12-02 00:04:23 +0100325 {
326 .callback = init_nvs_nosave,
327 .ident = "Asus K54C",
328 .matches = {
329 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
330 DMI_MATCH(DMI_PRODUCT_NAME, "K54C"),
331 },
332 },
333 {
334 .callback = init_nvs_nosave,
335 .ident = "Asus K54HR",
336 .matches = {
337 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
338 DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"),
339 },
340 },
Zhang Ruicbc00c12017-01-16 10:55:45 +0800341 /*
342 * https://bugzilla.kernel.org/show_bug.cgi?id=189431
343 * Lenovo G50-45 is a platform later than 2012, but needs nvs memory
344 * saving during S3.
345 */
346 {
347 .callback = init_nvs_save_s3,
348 .ident = "Lenovo G50-45",
349 .matches = {
350 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
351 DMI_MATCH(DMI_PRODUCT_NAME, "80E3"),
352 },
353 },
Rafael J. Wysocki71630b72017-11-06 23:56:57 +0100354 /*
355 * https://bugzilla.kernel.org/show_bug.cgi?id=196907
356 * Some Dell XPS13 9360 cannot do suspend-to-idle using the Low Power
357 * S0 Idle firmware interface.
358 */
359 {
360 .callback = init_no_lps0,
361 .ident = "Dell XPS13 9360",
362 .matches = {
363 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
364 DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9360"),
365 },
366 },
Chen Yu855c1c22018-04-10 23:07:51 +0800367 /*
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 {
373 .callback = init_no_lps0,
374 .ident = "ThinkPad X1 Tablet(2016)",
375 .matches = {
376 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
377 DMI_MATCH(DMI_PRODUCT_NAME, "20GGA00L00"),
378 },
379 },
Carlos Corbachoe41fb7c2008-07-23 21:28:43 -0700380 {},
381};
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100382
Rafael J. Wysocki57044032017-11-15 02:16:55 +0100383static bool ignore_blacklist;
384
385void __init acpi_sleep_no_blacklist(void)
386{
387 ignore_blacklist = true;
388}
389
Jan Beulich8b691c92015-01-23 08:12:06 +0000390static void __init acpi_sleep_dmi_check(void)
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100391{
Rafael J. Wysocki57044032017-11-15 02:16:55 +0100392 if (ignore_blacklist)
393 return;
394
Andy Shevchenko9c0a30b62018-02-22 14:59:22 +0200395 if (dmi_get_bios_year() >= 2012)
Lan Tianyu821d6f02014-07-23 14:42:33 +0800396 acpi_nvs_nosave_s3();
397
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100398 dmi_check_system(acpisleep_dmi_table);
399}
400
401/**
402 * acpi_pm_freeze - Disable the GPEs and suspend EC transactions.
403 */
404static int acpi_pm_freeze(void)
405{
406 acpi_disable_all_gpes();
407 acpi_os_wait_events_complete();
408 acpi_ec_block_transactions();
409 return 0;
410}
411
412/**
413 * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS.
414 */
415static int acpi_pm_pre_suspend(void)
416{
417 acpi_pm_freeze();
418 return suspend_nvs_save();
419}
420
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 */
427static int __acpi_pm_prepare(void)
428{
429 int error = acpi_sleep_prepare(acpi_target_sleep_state);
430 if (error)
431 acpi_target_sleep_state = ACPI_STATE_S0;
432
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 */
440static int acpi_pm_prepare(void)
441{
442 int error = __acpi_pm_prepare();
443 if (!error)
444 error = acpi_pm_pre_suspend();
445
446 return error;
447}
448
449static int find_powerf_dev(struct device *dev, void *data)
450{
451 struct acpi_device *device = to_acpi_device(dev);
452 const char *hid = acpi_device_hid(device);
453
454 return !strcmp(hid, ACPI_BUTTON_HID_POWERF);
455}
456
457/**
458 * acpi_pm_finish - Instruct the platform to leave a sleep state.
459 *
460 * This is called after we wake back up (or if entering the sleep state
461 * failed).
462 */
463static void acpi_pm_finish(void)
464{
465 struct device *pwr_btn_dev;
466 u32 acpi_state = acpi_target_sleep_state;
467
468 acpi_ec_unblock_transactions();
469 suspend_nvs_free();
470
471 if (acpi_state == ACPI_STATE_S0)
472 return;
473
474 printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n",
475 acpi_state);
476 acpi_disable_wakeup_devices(acpi_state);
477 acpi_leave_sleep_state(acpi_state);
478
479 /* reset firmware waking vector */
Rafael J. Wysockie3e9b572016-01-04 22:05:20 +0100480 acpi_set_waking_vector(0);
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100481
482 acpi_target_sleep_state = ACPI_STATE_S0;
483
Rafael J. Wysocki781d7372013-01-17 14:11:06 +0100484 acpi_resume_power_resources();
485
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100486 /* If we were woken with the fixed power button, provide a small
487 * hint to userspace in the form of a wakeup event on the fixed power
488 * button device (if it can be found).
489 *
490 * We delay the event generation til now, as the PM layer requires
491 * timekeeping to be running before we generate events. */
492 if (!pwr_btn_event_pending)
493 return;
494
495 pwr_btn_event_pending = false;
496 pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL,
497 find_powerf_dev);
498 if (pwr_btn_dev) {
499 pm_wakeup_event(pwr_btn_dev, 0);
500 put_device(pwr_btn_dev);
501 }
502}
503
504/**
Rafael J. Wysockiad072772013-08-20 01:42:32 +0200505 * acpi_pm_start - Start system PM transition.
506 */
507static void acpi_pm_start(u32 acpi_state)
508{
509 acpi_target_sleep_state = acpi_state;
510 acpi_sleep_tts_switch(acpi_target_sleep_state);
511 acpi_scan_lock_acquire();
512}
513
514/**
515 * acpi_pm_end - Finish up system PM transition.
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100516 */
517static void acpi_pm_end(void)
518{
Hans de Goede8ece1d82017-04-30 22:54:16 +0200519 acpi_turn_off_unused_power_resources();
Rafael J. Wysockiad072772013-08-20 01:42:32 +0200520 acpi_scan_lock_release();
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100521 /*
522 * This is necessary in case acpi_pm_finish() is not called during a
523 * failing transition to a sleep state.
524 */
525 acpi_target_sleep_state = ACPI_STATE_S0;
526 acpi_sleep_tts_switch(acpi_target_sleep_state);
527}
528#else /* !CONFIG_ACPI_SLEEP */
529#define acpi_target_sleep_state ACPI_STATE_S0
Rafael J. Wysocki71630b72017-11-06 23:56:57 +0100530#define acpi_sleep_no_lps0 (false)
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100531static inline void acpi_sleep_dmi_check(void) {}
532#endif /* CONFIG_ACPI_SLEEP */
533
534#ifdef CONFIG_SUSPEND
535static u32 acpi_suspend_states[] = {
536 [PM_SUSPEND_ON] = ACPI_STATE_S0,
537 [PM_SUSPEND_STANDBY] = ACPI_STATE_S1,
538 [PM_SUSPEND_MEM] = ACPI_STATE_S3,
539 [PM_SUSPEND_MAX] = ACPI_STATE_S5
540};
541
542/**
543 * acpi_suspend_begin - Set the target system sleep state to the state
544 * associated with given @pm_state, if supported.
545 */
546static int acpi_suspend_begin(suspend_state_t pm_state)
547{
548 u32 acpi_state = acpi_suspend_states[pm_state];
Rafael J. Wysockiad072772013-08-20 01:42:32 +0200549 int error;
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100550
551 error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc();
552 if (error)
553 return error;
554
Rafael J. Wysockiad072772013-08-20 01:42:32 +0200555 if (!sleep_states[acpi_state]) {
556 pr_err("ACPI does not support sleep state S%u\n", acpi_state);
557 return -ENOSYS;
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100558 }
Rafael J. Wysockief25ba02015-10-07 00:49:34 +0200559 if (acpi_state > ACPI_STATE_S1)
560 pm_set_suspend_via_firmware();
Rafael J. Wysockiad072772013-08-20 01:42:32 +0200561
562 acpi_pm_start(acpi_state);
563 return 0;
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100564}
565
566/**
567 * acpi_suspend_enter - Actually enter a sleep state.
568 * @pm_state: ignored
569 *
570 * Flush caches and go to sleep. For STR we have to call arch-specific
571 * assembly, which in turn call acpi_enter_sleep_state().
572 * It's unfortunate, but it works. Please fix if you're feeling frisky.
573 */
574static int acpi_suspend_enter(suspend_state_t pm_state)
575{
576 acpi_status status = AE_OK;
577 u32 acpi_state = acpi_target_sleep_state;
578 int error;
579
580 ACPI_FLUSH_CPU_CACHE();
581
Todd E Brandtbb3632c2014-06-06 05:40:17 -0700582 trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true);
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100583 switch (acpi_state) {
584 case ACPI_STATE_S1:
585 barrier();
586 status = acpi_enter_sleep_state(acpi_state);
587 break;
588
589 case ACPI_STATE_S3:
Konrad Rzeszutek Wilkd6a77ea2013-05-14 17:09:16 +0000590 if (!acpi_suspend_lowlevel)
591 return -ENOSYS;
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100592 error = acpi_suspend_lowlevel();
593 if (error)
594 return error;
595 pr_info(PREFIX "Low-level resume complete\n");
Rafael J. Wysockief25ba02015-10-07 00:49:34 +0200596 pm_set_resume_via_firmware();
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100597 break;
598 }
Todd E Brandtbb3632c2014-06-06 05:40:17 -0700599 trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false);
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100600
601 /* This violates the spec but is required for bug compatibility. */
602 acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
603
604 /* Reprogram control registers */
605 acpi_leave_sleep_state_prep(acpi_state);
606
607 /* ACPI 3.0 specs (P62) says that it's the responsibility
608 * of the OSPM to clear the status bit [ implying that the
609 * POWER_BUTTON event should not reach userspace ]
610 *
611 * However, we do generate a small hint for userspace in the form of
612 * a wakeup event. We flag this condition for now and generate the
613 * event later, as we're currently too early in resume to be able to
614 * generate wakeup events.
615 */
616 if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) {
Al Stone51468a92013-11-20 15:45:51 -0700617 acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED;
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100618
619 acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status);
620
Lv Zheng18864cc2016-08-04 16:43:45 +0800621 if (pwr_btn_status & ACPI_EVENT_FLAG_STATUS_SET) {
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100622 acpi_clear_event(ACPI_EVENT_POWER_BUTTON);
623 /* Flag for later */
624 pwr_btn_event_pending = true;
625 }
626 }
627
628 /*
629 * Disable and clear GPE status before interrupt is enabled. Some GPEs
630 * (like wakeup GPE) haven't handler, this can avoid such GPE misfire.
631 * acpi_leave_sleep_state will reenable specific GPEs later
632 */
633 acpi_disable_all_gpes();
634 /* Allow EC transactions to happen. */
Lv Zhengc2b46d672016-08-03 16:01:36 +0800635 acpi_ec_unblock_transactions();
Zhang Rui0ac1b1d2012-11-30 12:57:03 +0100636
637 suspend_nvs_restore();
638
639 return ACPI_SUCCESS(status) ? 0 : -EFAULT;
640}
641
642static int acpi_suspend_state_valid(suspend_state_t pm_state)
643{
644 u32 acpi_state;
645
646 switch (pm_state) {
647 case PM_SUSPEND_ON:
648 case PM_SUSPEND_STANDBY:
649 case PM_SUSPEND_MEM:
650 acpi_state = acpi_suspend_states[pm_state];
651
652 return sleep_states[acpi_state];
653 default:
654 return 0;
655 }
656}
657
658static const struct platform_suspend_ops acpi_suspend_ops = {
659 .valid = acpi_suspend_state_valid,
660 .begin = acpi_suspend_begin,
661 .prepare_late = acpi_pm_prepare,
662 .enter = acpi_suspend_enter,
663 .wake = acpi_pm_finish,
664 .end = acpi_pm_end,
665};
666
667/**
668 * acpi_suspend_begin_old - Set the target system sleep state to the
669 * state associated with given @pm_state, if supported, and
670 * execute the _PTS control method. This function is used if the
671 * pre-ACPI 2.0 suspend ordering has been requested.
672 */
673static int acpi_suspend_begin_old(suspend_state_t pm_state)
674{
675 int error = acpi_suspend_begin(pm_state);
676 if (!error)
677 error = __acpi_pm_prepare();
678
679 return error;
680}
681
682/*
683 * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
684 * been requested.
685 */
686static const struct platform_suspend_ops acpi_suspend_ops_old = {
687 .valid = acpi_suspend_state_valid,
688 .begin = acpi_suspend_begin_old,
689 .prepare_late = acpi_pm_pre_suspend,
690 .enter = acpi_suspend_enter,
691 .wake = acpi_pm_finish,
692 .end = acpi_pm_end,
693 .recover = acpi_pm_finish,
694};
Rafael J. Wysocki02040f02013-01-17 14:11:09 +0100695
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +0200696static bool s2idle_in_progress;
Rafael J. Wysocki33e4f802017-06-12 22:56:34 +0200697static bool s2idle_wakeup;
698
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +0200699/*
700 * On platforms supporting the Low Power S0 Idle interface there is an ACPI
701 * device object with the PNP0D80 compatible device ID (System Power Management
702 * Controller) and a specific _DSM method under it. That method, if present,
703 * can be used to indicate to the platform that the OS is transitioning into a
704 * low-power state in which certain types of activity are not desirable or that
705 * it is leaving such a state, which allows the platform to adjust its operation
706 * mode accordingly.
707 */
708static const struct acpi_device_id lps0_device_ids[] = {
709 {"PNP0D80", },
710 {"", },
711};
712
713#define ACPI_LPS0_DSM_UUID "c4eb40a0-6cd2-11e2-bcfd-0800200c9a66"
714
Srinivas Pandruvada726fb6b2017-08-15 18:16:59 -0700715#define ACPI_LPS0_GET_DEVICE_CONSTRAINTS 1
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +0200716#define ACPI_LPS0_SCREEN_OFF 3
717#define ACPI_LPS0_SCREEN_ON 4
718#define ACPI_LPS0_ENTRY 5
719#define ACPI_LPS0_EXIT 6
720
Rafael J. Wysocki29a5a6d2018-01-11 02:13:58 +0100721#define ACPI_LPS0_SCREEN_MASK ((1 << ACPI_LPS0_SCREEN_OFF) | (1 << ACPI_LPS0_SCREEN_ON))
722#define ACPI_LPS0_PLATFORM_MASK ((1 << ACPI_LPS0_ENTRY) | (1 << ACPI_LPS0_EXIT))
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +0200723
724static acpi_handle lps0_device_handle;
725static guid_t lps0_dsm_guid;
726static char lps0_dsm_func_mask;
727
Srinivas Pandruvada726fb6b2017-08-15 18:16:59 -0700728/* Device constraint entry structure */
729struct lpi_device_info {
730 char *name;
731 int enabled;
732 union acpi_object *package;
733};
734
735/* Constraint package structure */
736struct lpi_device_constraint {
737 int uid;
738 int min_dstate;
739 int function_states;
740};
741
742struct lpi_constraints {
743 acpi_handle handle;
744 int min_dstate;
745};
746
747static struct lpi_constraints *lpi_constraints_table;
748static int lpi_constraints_table_size;
749
750static void lpi_device_get_constraints(void)
751{
752 union acpi_object *out_obj;
753 int i;
754
755 out_obj = acpi_evaluate_dsm_typed(lps0_device_handle, &lps0_dsm_guid,
756 1, ACPI_LPS0_GET_DEVICE_CONSTRAINTS,
757 NULL, ACPI_TYPE_PACKAGE);
758
759 acpi_handle_debug(lps0_device_handle, "_DSM function 1 eval %s\n",
760 out_obj ? "successful" : "failed");
761
762 if (!out_obj)
763 return;
764
765 lpi_constraints_table = kcalloc(out_obj->package.count,
766 sizeof(*lpi_constraints_table),
767 GFP_KERNEL);
768 if (!lpi_constraints_table)
769 goto free_acpi_buffer;
770
771 acpi_handle_debug(lps0_device_handle, "LPI: constraints list begin:\n");
772
773 for (i = 0; i < out_obj->package.count; i++) {
774 struct lpi_constraints *constraint;
775 acpi_status status;
776 union acpi_object *package = &out_obj->package.elements[i];
777 struct lpi_device_info info = { };
778 int package_count = 0, j;
779
780 if (!package)
781 continue;
782
783 for (j = 0; j < package->package.count; ++j) {
784 union acpi_object *element =
785 &(package->package.elements[j]);
786
787 switch (element->type) {
788 case ACPI_TYPE_INTEGER:
789 info.enabled = element->integer.value;
790 break;
791 case ACPI_TYPE_STRING:
792 info.name = element->string.pointer;
793 break;
794 case ACPI_TYPE_PACKAGE:
795 package_count = element->package.count;
796 info.package = element->package.elements;
797 break;
798 }
799 }
800
801 if (!info.enabled || !info.package || !info.name)
802 continue;
803
804 constraint = &lpi_constraints_table[lpi_constraints_table_size];
805
806 status = acpi_get_handle(NULL, info.name, &constraint->handle);
807 if (ACPI_FAILURE(status))
808 continue;
809
810 acpi_handle_debug(lps0_device_handle,
811 "index:%d Name:%s\n", i, info.name);
812
813 constraint->min_dstate = -1;
814
815 for (j = 0; j < package_count; ++j) {
816 union acpi_object *info_obj = &info.package[j];
817 union acpi_object *cnstr_pkg;
818 union acpi_object *obj;
819 struct lpi_device_constraint dev_info;
820
821 switch (info_obj->type) {
822 case ACPI_TYPE_INTEGER:
823 /* version */
824 break;
825 case ACPI_TYPE_PACKAGE:
826 if (info_obj->package.count < 2)
827 break;
828
829 cnstr_pkg = info_obj->package.elements;
830 obj = &cnstr_pkg[0];
831 dev_info.uid = obj->integer.value;
832 obj = &cnstr_pkg[1];
833 dev_info.min_dstate = obj->integer.value;
834
835 acpi_handle_debug(lps0_device_handle,
836 "uid:%d min_dstate:%s\n",
837 dev_info.uid,
838 acpi_power_state_string(dev_info.min_dstate));
839
840 constraint->min_dstate = dev_info.min_dstate;
841 break;
842 }
843 }
844
845 if (constraint->min_dstate < 0) {
846 acpi_handle_debug(lps0_device_handle,
847 "Incomplete constraint defined\n");
848 continue;
849 }
850
851 lpi_constraints_table_size++;
852 }
853
854 acpi_handle_debug(lps0_device_handle, "LPI: constraints list end\n");
855
856free_acpi_buffer:
857 ACPI_FREE(out_obj);
858}
859
860static void lpi_check_constraints(void)
861{
862 int i;
863
864 for (i = 0; i < lpi_constraints_table_size; ++i) {
Rafael J. Wysockifa541502018-03-13 10:47:36 +0100865 acpi_handle handle = lpi_constraints_table[i].handle;
Srinivas Pandruvada726fb6b2017-08-15 18:16:59 -0700866 struct acpi_device *adev;
867
Rafael J. Wysockifa541502018-03-13 10:47:36 +0100868 if (!handle || acpi_bus_get_device(handle, &adev))
Srinivas Pandruvada726fb6b2017-08-15 18:16:59 -0700869 continue;
870
Rafael J. Wysockifa541502018-03-13 10:47:36 +0100871 acpi_handle_debug(handle,
Srinivas Pandruvada726fb6b2017-08-15 18:16:59 -0700872 "LPI: required min power state:%s current power state:%s\n",
873 acpi_power_state_string(lpi_constraints_table[i].min_dstate),
874 acpi_power_state_string(adev->power.state));
875
876 if (!adev->flags.power_manageable) {
Rafael J. Wysockifa541502018-03-13 10:47:36 +0100877 acpi_handle_info(handle, "LPI: Device not power manageable\n");
878 lpi_constraints_table[i].handle = NULL;
Srinivas Pandruvada726fb6b2017-08-15 18:16:59 -0700879 continue;
880 }
881
882 if (adev->power.state < lpi_constraints_table[i].min_dstate)
Rafael J. Wysockifa541502018-03-13 10:47:36 +0100883 acpi_handle_info(handle,
Srinivas Pandruvada726fb6b2017-08-15 18:16:59 -0700884 "LPI: Constraint not met; min power state:%s current power state:%s\n",
885 acpi_power_state_string(lpi_constraints_table[i].min_dstate),
886 acpi_power_state_string(adev->power.state));
887 }
888}
889
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +0200890static void acpi_sleep_run_lps0_dsm(unsigned int func)
891{
892 union acpi_object *out_obj;
893
894 if (!(lps0_dsm_func_mask & (1 << func)))
895 return;
896
897 out_obj = acpi_evaluate_dsm(lps0_device_handle, &lps0_dsm_guid, 1, func, NULL);
898 ACPI_FREE(out_obj);
899
900 acpi_handle_debug(lps0_device_handle, "_DSM function %u evaluation %s\n",
901 func, out_obj ? "successful" : "failed");
902}
903
904static int lps0_device_attach(struct acpi_device *adev,
905 const struct acpi_device_id *not_used)
906{
907 union acpi_object *out_obj;
908
909 if (lps0_device_handle)
910 return 0;
911
Rafael J. Wysocki71630b72017-11-06 23:56:57 +0100912 if (acpi_sleep_no_lps0) {
913 acpi_handle_info(adev->handle,
914 "Low Power S0 Idle interface disabled\n");
915 return 0;
916 }
917
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +0200918 if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0))
919 return 0;
920
921 guid_parse(ACPI_LPS0_DSM_UUID, &lps0_dsm_guid);
922 /* Check if the _DSM is present and as expected. */
923 out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 1, 0, NULL);
924 if (out_obj && out_obj->type == ACPI_TYPE_BUFFER) {
925 char bitmask = *(char *)out_obj->buffer.pointer;
926
Rafael J. Wysocki29a5a6d2018-01-11 02:13:58 +0100927 if ((bitmask & ACPI_LPS0_PLATFORM_MASK) == ACPI_LPS0_PLATFORM_MASK ||
928 (bitmask & ACPI_LPS0_SCREEN_MASK) == ACPI_LPS0_SCREEN_MASK) {
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +0200929 lps0_dsm_func_mask = bitmask;
930 lps0_device_handle = adev->handle;
Rafael J. Wysockie870c6c82017-07-31 23:43:18 +0200931 /*
932 * Use suspend-to-idle by default if the default
933 * suspend mode was not set from the command line.
934 */
935 if (mem_sleep_default > PM_SUSPEND_MEM)
Rafael J. Wysocki690cbb92017-08-10 00:13:07 +0200936 mem_sleep_current = PM_SUSPEND_TO_IDLE;
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +0200937 }
938
939 acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n",
940 bitmask);
941 } else {
942 acpi_handle_debug(adev->handle,
943 "_DSM function 0 evaluation failed\n");
944 }
945 ACPI_FREE(out_obj);
Srinivas Pandruvada726fb6b2017-08-15 18:16:59 -0700946
947 lpi_device_get_constraints();
948
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +0200949 return 0;
950}
951
952static struct acpi_scan_handler lps0_handler = {
953 .ids = lps0_device_ids,
954 .attach = lps0_device_attach,
955};
956
Rafael J. Wysocki23d5855f2017-08-10 00:15:30 +0200957static int acpi_s2idle_begin(void)
Rafael J. Wysocki1f0b6382014-05-15 23:29:57 +0200958{
959 acpi_scan_lock_acquire();
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +0200960 s2idle_in_progress = true;
Rafael J. Wysocki1f0b6382014-05-15 23:29:57 +0200961 return 0;
962}
963
Rafael J. Wysocki23d5855f2017-08-10 00:15:30 +0200964static int acpi_s2idle_prepare(void)
Rafael J. Wysockia8d46b92014-09-30 02:29:01 +0200965{
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +0200966 if (lps0_device_handle) {
967 acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF);
968 acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY);
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +0200969 }
Rafael J. Wysocki147a7d92018-02-20 12:10:32 +0100970
Chen Yu8c012752015-10-25 01:02:46 +0800971 if (acpi_sci_irq_valid())
972 enable_irq_wake(acpi_sci_irq);
Rafael J. Wysocki235d81a62017-06-12 22:51:07 +0200973
Rafael J. Wysockia8d46b92014-09-30 02:29:01 +0200974 return 0;
975}
976
Rafael J. Wysocki23d5855f2017-08-10 00:15:30 +0200977static void acpi_s2idle_wake(void)
Rafael J. Wysocki33e4f802017-06-12 22:56:34 +0200978{
Srinivas Pandruvada726fb6b2017-08-15 18:16:59 -0700979
980 if (pm_debug_messages_on)
981 lpi_check_constraints();
982
Rafael J. Wysocki33e4f802017-06-12 22:56:34 +0200983 /*
984 * If IRQD_WAKEUP_ARMED is not set for the SCI at this point, it means
985 * that the SCI has triggered while suspended, so cancel the wakeup in
986 * case it has not been a wakeup event (the GPEs will be checked later).
987 */
988 if (acpi_sci_irq_valid() &&
989 !irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq))) {
990 pm_system_cancel_wakeup();
991 s2idle_wakeup = true;
Rafael J. Wysocki68e22012018-05-16 14:13:21 +0200992 /*
993 * On some platforms with the LPS0 _DSM device noirq resume
994 * takes too much time for EC wakeup events to survive, so look
995 * for them now.
996 */
997 if (lps0_device_handle)
998 acpi_ec_dispatch_gpe();
Rafael J. Wysocki33e4f802017-06-12 22:56:34 +0200999 }
1000}
1001
Rafael J. Wysocki23d5855f2017-08-10 00:15:30 +02001002static void acpi_s2idle_sync(void)
Rafael J. Wysocki33e4f802017-06-12 22:56:34 +02001003{
1004 /*
1005 * Process all pending events in case there are any wakeup ones.
1006 *
Rafael J. Wysocki880a6622017-07-20 03:43:12 +02001007 * The EC driver uses the system workqueue and an additional special
1008 * one, so those need to be flushed too.
Rafael J. Wysocki33e4f802017-06-12 22:56:34 +02001009 */
Chris Chiu6f1d7c42018-03-31 10:09:31 +08001010 acpi_os_wait_events_complete(); /* synchronize SCI IRQ handling */
Rafael J. Wysocki880a6622017-07-20 03:43:12 +02001011 acpi_ec_flush_work();
Chris Chiu6f1d7c42018-03-31 10:09:31 +08001012 acpi_os_wait_events_complete(); /* synchronize Notify handling */
Rafael J. Wysocki33e4f802017-06-12 22:56:34 +02001013 s2idle_wakeup = false;
1014}
1015
Rafael J. Wysocki23d5855f2017-08-10 00:15:30 +02001016static void acpi_s2idle_restore(void)
Rafael J. Wysockia8d46b92014-09-30 02:29:01 +02001017{
Chen Yu8c012752015-10-25 01:02:46 +08001018 if (acpi_sci_irq_valid())
1019 disable_irq_wake(acpi_sci_irq);
Rafael J. Wysocki235d81a62017-06-12 22:51:07 +02001020
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +02001021 if (lps0_device_handle) {
1022 acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT);
1023 acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON);
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +02001024 }
Rafael J. Wysockia8d46b92014-09-30 02:29:01 +02001025}
1026
Rafael J. Wysocki23d5855f2017-08-10 00:15:30 +02001027static void acpi_s2idle_end(void)
Rafael J. Wysocki1f0b6382014-05-15 23:29:57 +02001028{
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +02001029 s2idle_in_progress = false;
Rafael J. Wysocki1f0b6382014-05-15 23:29:57 +02001030 acpi_scan_lock_release();
1031}
1032
Rafael J. Wysocki23d5855f2017-08-10 00:15:30 +02001033static const struct platform_s2idle_ops acpi_s2idle_ops = {
1034 .begin = acpi_s2idle_begin,
1035 .prepare = acpi_s2idle_prepare,
1036 .wake = acpi_s2idle_wake,
1037 .sync = acpi_s2idle_sync,
1038 .restore = acpi_s2idle_restore,
1039 .end = acpi_s2idle_end,
Rafael J. Wysocki1f0b6382014-05-15 23:29:57 +02001040};
1041
Rafael J. Wysocki02040f02013-01-17 14:11:09 +01001042static void acpi_sleep_suspend_setup(void)
1043{
1044 int i;
1045
Rafael J. Wysockia4e90be2014-03-13 22:11:39 +01001046 for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++)
1047 if (acpi_sleep_state_supported(i))
Rafael J. Wysocki02040f02013-01-17 14:11:09 +01001048 sleep_states[i] = 1;
Rafael J. Wysocki02040f02013-01-17 14:11:09 +01001049
1050 suspend_set_ops(old_suspend_ordering ?
1051 &acpi_suspend_ops_old : &acpi_suspend_ops);
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +02001052
1053 acpi_scan_add_handler(&lps0_handler);
Rafael J. Wysocki23d5855f2017-08-10 00:15:30 +02001054 s2idle_set_ops(&acpi_s2idle_ops);
Rafael J. Wysocki02040f02013-01-17 14:11:09 +01001055}
Rafael J. Wysocki1f0b6382014-05-15 23:29:57 +02001056
Rafael J. Wysocki02040f02013-01-17 14:11:09 +01001057#else /* !CONFIG_SUSPEND */
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +02001058#define s2idle_in_progress (false)
1059#define s2idle_wakeup (false)
1060#define lps0_device_handle (NULL)
Rafael J. Wysocki02040f02013-01-17 14:11:09 +01001061static inline void acpi_sleep_suspend_setup(void) {}
1062#endif /* !CONFIG_SUSPEND */
Rafael J. Wysocki296699d2007-07-29 23:27:18 +02001063
Rafael J. Wysocki33e4f802017-06-12 22:56:34 +02001064bool acpi_s2idle_wakeup(void)
1065{
1066 return s2idle_wakeup;
1067}
1068
Rafael J. Wysocki8110dd282017-06-23 15:24:32 +02001069bool acpi_sleep_no_ec_events(void)
1070{
1071 return !s2idle_in_progress || !lps0_device_handle;
1072}
1073
Sudeep Holla504997c2016-02-17 12:03:23 +00001074#ifdef CONFIG_PM_SLEEP
1075static u32 saved_bm_rld;
1076
1077static int acpi_save_bm_rld(void)
1078{
1079 acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld);
1080 return 0;
1081}
1082
1083static void acpi_restore_bm_rld(void)
1084{
1085 u32 resumed_bm_rld = 0;
1086
1087 acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld);
1088 if (resumed_bm_rld == saved_bm_rld)
1089 return;
1090
1091 acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld);
1092}
1093
1094static struct syscore_ops acpi_sleep_syscore_ops = {
1095 .suspend = acpi_save_bm_rld,
1096 .resume = acpi_restore_bm_rld,
1097};
1098
Jean Delvarea042e0c2017-07-31 11:40:13 +02001099static void acpi_sleep_syscore_init(void)
Sudeep Holla504997c2016-02-17 12:03:23 +00001100{
1101 register_syscore_ops(&acpi_sleep_syscore_ops);
1102}
1103#else
1104static inline void acpi_sleep_syscore_init(void) {}
1105#endif /* CONFIG_PM_SLEEP */
1106
Rafael J. Wysockib0cb1a12007-07-29 23:24:36 +02001107#ifdef CONFIG_HIBERNATION
Shaohua Libdfe6b72008-07-23 21:28:41 -07001108static unsigned long s4_hardware_signature;
1109static struct acpi_table_facs *facs;
1110static bool nosigcheck;
1111
1112void __init acpi_no_s4_hw_signature(void)
1113{
1114 nosigcheck = true;
1115}
1116
Rafael J. Wysockicaea99e2008-01-08 00:08:44 +01001117static int acpi_hibernation_begin(void)
Rafael J. Wysocki74f270a2007-10-18 03:04:42 -07001118{
Rafael J. Wysocki3f4b0ef2008-10-26 20:52:15 +01001119 int error;
1120
Rafael J. Wysocki72ad5d72010-07-23 22:59:09 +02001121 error = nvs_nosave ? 0 : suspend_nvs_alloc();
Rafael J. Wysockiad072772013-08-20 01:42:32 +02001122 if (!error)
1123 acpi_pm_start(ACPI_STATE_S4);
Rafael J. Wysocki3f4b0ef2008-10-26 20:52:15 +01001124
1125 return error;
1126}
1127
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -07001128static int acpi_hibernation_enter(void)
1129{
1130 acpi_status status = AE_OK;
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -07001131
1132 ACPI_FLUSH_CPU_CACHE();
1133
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -07001134 /* This shouldn't return. If it returns, we have a problem */
Len Brown3f6f49c2012-07-26 20:08:54 -04001135 status = acpi_enter_sleep_state(ACPI_STATE_S4);
1136 /* Reprogram control registers */
1137 acpi_leave_sleep_state_prep(ACPI_STATE_S4);
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -07001138
1139 return ACPI_SUCCESS(status) ? 0 : -EFAULT;
1140}
1141
Rafael J. Wysockic7e08312007-10-18 03:04:55 -07001142static void acpi_hibernation_leave(void)
1143{
Lukas Wunnerfbda4b32016-03-23 00:11:20 +01001144 pm_set_resume_via_firmware();
Rafael J. Wysockic7e08312007-10-18 03:04:55 -07001145 /*
1146 * If ACPI is not enabled by the BIOS and the boot kernel, we need to
1147 * enable it here.
1148 */
1149 acpi_enable();
Len Brown3f6f49c2012-07-26 20:08:54 -04001150 /* Reprogram control registers */
1151 acpi_leave_sleep_state_prep(ACPI_STATE_S4);
Shaohua Libdfe6b72008-07-23 21:28:41 -07001152 /* Check the hardware signature */
Oliver Neukum5c551e62014-01-10 10:51:53 +01001153 if (facs && s4_hardware_signature != facs->hardware_signature)
1154 pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n");
Rafael J. Wysocki3f4b0ef2008-10-26 20:52:15 +01001155 /* Restore the NVS memory area */
Matthew Garrettdd4c4f12010-05-28 16:32:14 -04001156 suspend_nvs_restore();
Rafael J. Wysockid5a64512010-04-09 01:39:40 +02001157 /* Allow EC transactions to happen. */
Lv Zhengc2b46d672016-08-03 16:01:36 +08001158 acpi_ec_unblock_transactions();
Rafael J. Wysockic7e08312007-10-18 03:04:55 -07001159}
1160
Rafael J. Wysockid5a64512010-04-09 01:39:40 +02001161static void acpi_pm_thaw(void)
Rafael J. Wysockif6bb13a2010-03-04 01:52:58 +01001162{
Rafael J. Wysockife955682010-04-09 01:40:38 +02001163 acpi_ec_unblock_transactions();
Lin Ming3d97e422008-12-16 16:57:46 +08001164 acpi_enable_all_runtime_gpes();
Rafael J. Wysockia634cc12007-07-19 01:47:30 -07001165}
1166
Lionel Debroux073ef1f2010-11-09 21:48:49 +01001167static const struct platform_hibernation_ops acpi_hibernation_ops = {
Rafael J. Wysockicaea99e2008-01-08 00:08:44 +01001168 .begin = acpi_hibernation_begin,
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +02001169 .end = acpi_pm_end,
Rafael J. Wysockic5f7a1b2010-07-02 00:14:09 +02001170 .pre_snapshot = acpi_pm_prepare,
Matthew Garrett2a6b6972010-05-28 16:32:15 -04001171 .finish = acpi_pm_finish,
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +02001172 .prepare = acpi_pm_prepare,
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -07001173 .enter = acpi_hibernation_enter,
Rafael J. Wysockic7e08312007-10-18 03:04:55 -07001174 .leave = acpi_hibernation_leave,
Rafael J. Wysockid5a64512010-04-09 01:39:40 +02001175 .pre_restore = acpi_pm_freeze,
1176 .restore_cleanup = acpi_pm_thaw,
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -07001177};
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +02001178
1179/**
1180 * acpi_hibernation_begin_old - Set the target system sleep state to
1181 * ACPI_STATE_S4 and execute the _PTS control method. This
1182 * function is used if the pre-ACPI 2.0 suspend ordering has been
1183 * requested.
1184 */
1185static int acpi_hibernation_begin_old(void)
1186{
Zhao Yakuie49f7112008-08-12 10:20:22 +08001187 int error;
1188 /*
1189 * The _TTS object should always be evaluated before the _PTS object.
1190 * When the old_suspended_ordering is true, the _PTS object is
1191 * evaluated in the acpi_sleep_prepare.
1192 */
1193 acpi_sleep_tts_switch(ACPI_STATE_S4);
1194
1195 error = acpi_sleep_prepare(ACPI_STATE_S4);
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +02001196
Rafael J. Wysocki3f4b0ef2008-10-26 20:52:15 +01001197 if (!error) {
Rafael J. Wysocki72ad5d72010-07-23 22:59:09 +02001198 if (!nvs_nosave)
Matthew Garrettdd4c4f12010-05-28 16:32:14 -04001199 error = suspend_nvs_alloc();
Rafael J. Wysockiad072772013-08-20 01:42:32 +02001200 if (!error) {
Rafael J. Wysocki3f4b0ef2008-10-26 20:52:15 +01001201 acpi_target_sleep_state = ACPI_STATE_S4;
Rafael J. Wysockiad072772013-08-20 01:42:32 +02001202 acpi_scan_lock_acquire();
1203 }
Rafael J. Wysocki3f4b0ef2008-10-26 20:52:15 +01001204 }
1205 return error;
1206}
1207
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +02001208/*
1209 * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
1210 * been requested.
1211 */
Lionel Debroux073ef1f2010-11-09 21:48:49 +01001212static const struct platform_hibernation_ops acpi_hibernation_ops_old = {
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +02001213 .begin = acpi_hibernation_begin_old,
1214 .end = acpi_pm_end,
Rafael J. Wysockic5f7a1b2010-07-02 00:14:09 +02001215 .pre_snapshot = acpi_pm_pre_suspend,
Rafael J. Wysockid5a64512010-04-09 01:39:40 +02001216 .prepare = acpi_pm_freeze,
Matthew Garrett2a6b6972010-05-28 16:32:15 -04001217 .finish = acpi_pm_finish,
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +02001218 .enter = acpi_hibernation_enter,
1219 .leave = acpi_hibernation_leave,
Rafael J. Wysockid5a64512010-04-09 01:39:40 +02001220 .pre_restore = acpi_pm_freeze,
1221 .restore_cleanup = acpi_pm_thaw,
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +02001222 .recover = acpi_pm_finish,
1223};
Rafael J. Wysocki02040f02013-01-17 14:11:09 +01001224
1225static void acpi_sleep_hibernate_setup(void)
1226{
Rafael J. Wysockia4e90be2014-03-13 22:11:39 +01001227 if (!acpi_sleep_state_supported(ACPI_STATE_S4))
Rafael J. Wysocki02040f02013-01-17 14:11:09 +01001228 return;
1229
1230 hibernation_set_ops(old_suspend_ordering ?
1231 &acpi_hibernation_ops_old : &acpi_hibernation_ops);
1232 sleep_states[ACPI_STATE_S4] = 1;
Rafael J. Wysocki02040f02013-01-17 14:11:09 +01001233 if (nosigcheck)
1234 return;
1235
1236 acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs);
1237 if (facs)
1238 s4_hardware_signature = facs->hardware_signature;
1239}
1240#else /* !CONFIG_HIBERNATION */
1241static inline void acpi_sleep_hibernate_setup(void) {}
1242#endif /* !CONFIG_HIBERNATION */
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -07001243
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +04001244static void acpi_power_off_prepare(void)
1245{
1246 /* Prepare to power off the system */
1247 acpi_sleep_prepare(ACPI_STATE_S5);
Lin Ming3d97e422008-12-16 16:57:46 +08001248 acpi_disable_all_gpes();
Rafael J. Wysockic52fa702014-12-01 23:51:13 +01001249 acpi_os_wait_events_complete();
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +04001250}
1251
1252static void acpi_power_off(void)
1253{
1254 /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
Frank Seidel4d939152009-02-04 17:03:07 +01001255 printk(KERN_DEBUG "%s called\n", __func__);
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +04001256 local_irq_disable();
Len Brown3f6f49c2012-07-26 20:08:54 -04001257 acpi_enter_sleep_state(ACPI_STATE_S5);
Len Brown96f15ef2009-04-17 23:32:20 -04001258}
1259
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -05001260int __init acpi_sleep_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261{
Joe Perchesed4cf5b2013-02-22 07:37:36 +00001262 char supported[ACPI_S_STATE_COUNT * 3 + 1];
1263 char *pos = supported;
1264 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265
Zhang Rui0ac1b1d2012-11-30 12:57:03 +01001266 acpi_sleep_dmi_check();
1267
Frans Pop5a50fe72007-09-20 22:27:44 +02001268 sleep_states[ACPI_STATE_S0] = 1;
Frans Pop5a50fe72007-09-20 22:27:44 +02001269
Sudeep Holla504997c2016-02-17 12:03:23 +00001270 acpi_sleep_syscore_init();
Rafael J. Wysocki02040f02013-01-17 14:11:09 +01001271 acpi_sleep_suspend_setup();
1272 acpi_sleep_hibernate_setup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273
Rafael J. Wysockia4e90be2014-03-13 22:11:39 +01001274 if (acpi_sleep_state_supported(ACPI_STATE_S5)) {
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +04001275 sleep_states[ACPI_STATE_S5] = 1;
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +04001276 pm_power_off_prepare = acpi_power_off_prepare;
1277 pm_power_off = acpi_power_off;
Chen Yu13737182016-03-22 08:51:10 +08001278 } else {
1279 acpi_no_s5 = true;
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +04001280 }
Joe Perchesed4cf5b2013-02-22 07:37:36 +00001281
1282 supported[0] = 0;
1283 for (i = 0; i < ACPI_S_STATE_COUNT; i++) {
1284 if (sleep_states[i])
1285 pos += sprintf(pos, " S%d", i);
1286 }
1287 pr_info(PREFIX "(supports%s)\n", supported);
1288
Zhao Yakuie49f7112008-08-12 10:20:22 +08001289 /*
Rafael J. Wysocki9713adc2016-11-21 14:25:49 +01001290 * Register the tts_notifier to reboot notifier list so that the _TTS
1291 * object can also be evaluated when the system enters S5.
Zhao Yakuie49f7112008-08-12 10:20:22 +08001292 */
Rafael J. Wysocki9713adc2016-11-21 14:25:49 +01001293 register_reboot_notifier(&tts_notifier);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 return 0;
1295}