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11#include <linux/delay.h>
12#include <linux/irq.h>
13#include <linux/dmi.h>
14#include <linux/device.h>
15#include <linux/interrupt.h>
16#include <linux/suspend.h>
17#include <linux/reboot.h>
18#include <linux/acpi.h>
19#include <linux/module.h>
20#include <linux/syscore_ops.h>
21#include <asm/io.h>
22#include <trace/events/power.h>
23
24#include "internal.h"
25#include "sleep.h"
26
27
28
29
30
31bool acpi_no_s5;
32static u8 sleep_states[ACPI_S_STATE_COUNT];
33
34static void acpi_sleep_tts_switch(u32 acpi_state)
35{
36 acpi_status status;
37
38 status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state);
39 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
40
41
42
43
44 printk(KERN_NOTICE "Failure in evaluating _TTS object\n");
45 }
46}
47
48static int tts_notify_reboot(struct notifier_block *this,
49 unsigned long code, void *x)
50{
51 acpi_sleep_tts_switch(ACPI_STATE_S5);
52 return NOTIFY_DONE;
53}
54
55static struct notifier_block tts_notifier = {
56 .notifier_call = tts_notify_reboot,
57 .next = NULL,
58 .priority = 0,
59};
60
61static int acpi_sleep_prepare(u32 acpi_state)
62{
63#ifdef CONFIG_ACPI_SLEEP
64
65 if (acpi_state == ACPI_STATE_S3) {
66 if (!acpi_wakeup_address)
67 return -EFAULT;
68 acpi_set_waking_vector(acpi_wakeup_address);
69
70 }
71 ACPI_FLUSH_CPU_CACHE();
72#endif
73 printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
74 acpi_state);
75 acpi_enable_wakeup_devices(acpi_state);
76 acpi_enter_sleep_state_prep(acpi_state);
77 return 0;
78}
79
80bool acpi_sleep_state_supported(u8 sleep_state)
81{
82 acpi_status status;
83 u8 type_a, type_b;
84
85 status = acpi_get_sleep_type_data(sleep_state, &type_a, &type_b);
86 return ACPI_SUCCESS(status) && (!acpi_gbl_reduced_hardware
87 || (acpi_gbl_FADT.sleep_control.address
88 && acpi_gbl_FADT.sleep_status.address));
89}
90
91#ifdef CONFIG_ACPI_SLEEP
92static bool sleep_no_lps0 __read_mostly;
93module_param(sleep_no_lps0, bool, 0644);
94MODULE_PARM_DESC(sleep_no_lps0, "Do not use the special LPS0 device interface");
95
96static u32 acpi_target_sleep_state = ACPI_STATE_S0;
97
98u32 acpi_target_system_state(void)
99{
100 return acpi_target_sleep_state;
101}
102EXPORT_SYMBOL_GPL(acpi_target_system_state);
103
104static bool pwr_btn_event_pending;
105
106
107
108
109
110
111
112
113static bool nvs_nosave;
114
115void __init acpi_nvs_nosave(void)
116{
117 nvs_nosave = true;
118}
119
120
121
122
123
124
125
126
127
128static bool nvs_nosave_s3;
129
130void __init acpi_nvs_nosave_s3(void)
131{
132 nvs_nosave_s3 = true;
133}
134
135static int __init init_nvs_save_s3(const struct dmi_system_id *d)
136{
137 nvs_nosave_s3 = false;
138 return 0;
139}
140
141
142
143
144
145
146static bool old_suspend_ordering;
147
148void __init acpi_old_suspend_ordering(void)
149{
150 old_suspend_ordering = true;
151}
152
153static int __init init_old_suspend_ordering(const struct dmi_system_id *d)
154{
155 acpi_old_suspend_ordering();
156 return 0;
157}
158
159static int __init init_nvs_nosave(const struct dmi_system_id *d)
160{
161 acpi_nvs_nosave();
162 return 0;
163}
164
165static bool acpi_sleep_default_s3;
166
167static int __init init_default_s3(const struct dmi_system_id *d)
168{
169 acpi_sleep_default_s3 = true;
170 return 0;
171}
172
173static const struct dmi_system_id acpisleep_dmi_table[] __initconst = {
174 {
175 .callback = init_old_suspend_ordering,
176 .ident = "Abit KN9 (nForce4 variant)",
177 .matches = {
178 DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"),
179 DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"),
180 },
181 },
182 {
183 .callback = init_old_suspend_ordering,
184 .ident = "HP xw4600 Workstation",
185 .matches = {
186 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
187 DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"),
188 },
189 },
190 {
191 .callback = init_old_suspend_ordering,
192 .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)",
193 .matches = {
194 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."),
195 DMI_MATCH(DMI_BOARD_NAME, "M2N8L"),
196 },
197 },
198 {
199 .callback = init_old_suspend_ordering,
200 .ident = "Panasonic CF51-2L",
201 .matches = {
202 DMI_MATCH(DMI_BOARD_VENDOR,
203 "Matsushita Electric Industrial Co.,Ltd."),
204 DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"),
205 },
206 },
207 {
208 .callback = init_nvs_nosave,
209 .ident = "Sony Vaio VGN-FW41E_H",
210 .matches = {
211 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
212 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"),
213 },
214 },
215 {
216 .callback = init_nvs_nosave,
217 .ident = "Sony Vaio VGN-FW21E",
218 .matches = {
219 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
220 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"),
221 },
222 },
223 {
224 .callback = init_nvs_nosave,
225 .ident = "Sony Vaio VGN-FW21M",
226 .matches = {
227 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
228 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"),
229 },
230 },
231 {
232 .callback = init_nvs_nosave,
233 .ident = "Sony Vaio VPCEB17FX",
234 .matches = {
235 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
236 DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"),
237 },
238 },
239 {
240 .callback = init_nvs_nosave,
241 .ident = "Sony Vaio VGN-SR11M",
242 .matches = {
243 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
244 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"),
245 },
246 },
247 {
248 .callback = init_nvs_nosave,
249 .ident = "Everex StepNote Series",
250 .matches = {
251 DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."),
252 DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"),
253 },
254 },
255 {
256 .callback = init_nvs_nosave,
257 .ident = "Sony Vaio VPCEB1Z1E",
258 .matches = {
259 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
260 DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"),
261 },
262 },
263 {
264 .callback = init_nvs_nosave,
265 .ident = "Sony Vaio VGN-NW130D",
266 .matches = {
267 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
268 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"),
269 },
270 },
271 {
272 .callback = init_nvs_nosave,
273 .ident = "Sony Vaio VPCCW29FX",
274 .matches = {
275 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
276 DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"),
277 },
278 },
279 {
280 .callback = init_nvs_nosave,
281 .ident = "Averatec AV1020-ED2",
282 .matches = {
283 DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"),
284 DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"),
285 },
286 },
287 {
288 .callback = init_old_suspend_ordering,
289 .ident = "Asus A8N-SLI DELUXE",
290 .matches = {
291 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
292 DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"),
293 },
294 },
295 {
296 .callback = init_old_suspend_ordering,
297 .ident = "Asus A8N-SLI Premium",
298 .matches = {
299 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
300 DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"),
301 },
302 },
303 {
304 .callback = init_nvs_nosave,
305 .ident = "Sony Vaio VGN-SR26GN_P",
306 .matches = {
307 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
308 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"),
309 },
310 },
311 {
312 .callback = init_nvs_nosave,
313 .ident = "Sony Vaio VPCEB1S1E",
314 .matches = {
315 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
316 DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"),
317 },
318 },
319 {
320 .callback = init_nvs_nosave,
321 .ident = "Sony Vaio VGN-FW520F",
322 .matches = {
323 DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
324 DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"),
325 },
326 },
327 {
328 .callback = init_nvs_nosave,
329 .ident = "Asus K54C",
330 .matches = {
331 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
332 DMI_MATCH(DMI_PRODUCT_NAME, "K54C"),
333 },
334 },
335 {
336 .callback = init_nvs_nosave,
337 .ident = "Asus K54HR",
338 .matches = {
339 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
340 DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"),
341 },
342 },
343 {
344 .callback = init_nvs_save_s3,
345 .ident = "Asus 1025C",
346 .matches = {
347 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
348 DMI_MATCH(DMI_PRODUCT_NAME, "1025C"),
349 },
350 },
351
352
353
354
355
356 {
357 .callback = init_nvs_save_s3,
358 .ident = "Lenovo G50-45",
359 .matches = {
360 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
361 DMI_MATCH(DMI_PRODUCT_NAME, "80E3"),
362 },
363 },
364
365
366
367
368
369 {
370 .callback = init_default_s3,
371 .ident = "ThinkPad X1 Tablet(2016)",
372 .matches = {
373 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
374 DMI_MATCH(DMI_PRODUCT_NAME, "20GGA00L00"),
375 },
376 },
377 {},
378};
379
380static bool ignore_blacklist;
381
382void __init acpi_sleep_no_blacklist(void)
383{
384 ignore_blacklist = true;
385}
386
387static void __init acpi_sleep_dmi_check(void)
388{
389 if (ignore_blacklist)
390 return;
391
392 if (dmi_get_bios_year() >= 2012)
393 acpi_nvs_nosave_s3();
394
395 dmi_check_system(acpisleep_dmi_table);
396}
397
398
399
400
401static int acpi_pm_freeze(void)
402{
403 acpi_disable_all_gpes();
404 acpi_os_wait_events_complete();
405 acpi_ec_block_transactions();
406 return 0;
407}
408
409
410
411
412static int acpi_pm_pre_suspend(void)
413{
414 acpi_pm_freeze();
415 return suspend_nvs_save();
416}
417
418
419
420
421
422
423
424static int __acpi_pm_prepare(void)
425{
426 int error = acpi_sleep_prepare(acpi_target_sleep_state);
427 if (error)
428 acpi_target_sleep_state = ACPI_STATE_S0;
429
430 return error;
431}
432
433
434
435
436
437static int acpi_pm_prepare(void)
438{
439 int error = __acpi_pm_prepare();
440 if (!error)
441 error = acpi_pm_pre_suspend();
442
443 return error;
444}
445
446
447
448
449
450
451
452static void acpi_pm_finish(void)
453{
454 struct acpi_device *pwr_btn_adev;
455 u32 acpi_state = acpi_target_sleep_state;
456
457 acpi_ec_unblock_transactions();
458 suspend_nvs_free();
459
460 if (acpi_state == ACPI_STATE_S0)
461 return;
462
463 printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n",
464 acpi_state);
465 acpi_disable_wakeup_devices(acpi_state);
466 acpi_leave_sleep_state(acpi_state);
467
468
469 acpi_set_waking_vector(0);
470
471 acpi_target_sleep_state = ACPI_STATE_S0;
472
473 acpi_resume_power_resources();
474
475
476
477
478
479
480
481 if (!pwr_btn_event_pending)
482 return;
483
484 pwr_btn_event_pending = false;
485 pwr_btn_adev = acpi_dev_get_first_match_dev(ACPI_BUTTON_HID_POWERF,
486 NULL, -1);
487 if (pwr_btn_adev) {
488 pm_wakeup_event(&pwr_btn_adev->dev, 0);
489 acpi_dev_put(pwr_btn_adev);
490 }
491}
492
493
494
495
496static void acpi_pm_start(u32 acpi_state)
497{
498 acpi_target_sleep_state = acpi_state;
499 acpi_sleep_tts_switch(acpi_target_sleep_state);
500 acpi_scan_lock_acquire();
501}
502
503
504
505
506static void acpi_pm_end(void)
507{
508 acpi_turn_off_unused_power_resources();
509 acpi_scan_lock_release();
510
511
512
513
514 acpi_target_sleep_state = ACPI_STATE_S0;
515 acpi_sleep_tts_switch(acpi_target_sleep_state);
516}
517#else
518#define sleep_no_lps0 (1)
519#define acpi_target_sleep_state ACPI_STATE_S0
520#define acpi_sleep_default_s3 (1)
521static inline void acpi_sleep_dmi_check(void) {}
522#endif
523
524#ifdef CONFIG_SUSPEND
525static u32 acpi_suspend_states[] = {
526 [PM_SUSPEND_ON] = ACPI_STATE_S0,
527 [PM_SUSPEND_STANDBY] = ACPI_STATE_S1,
528 [PM_SUSPEND_MEM] = ACPI_STATE_S3,
529 [PM_SUSPEND_MAX] = ACPI_STATE_S5
530};
531
532
533
534
535
536static int acpi_suspend_begin(suspend_state_t pm_state)
537{
538 u32 acpi_state = acpi_suspend_states[pm_state];
539 int error;
540
541 error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc();
542 if (error)
543 return error;
544
545 if (!sleep_states[acpi_state]) {
546 pr_err("ACPI does not support sleep state S%u\n", acpi_state);
547 return -ENOSYS;
548 }
549 if (acpi_state > ACPI_STATE_S1)
550 pm_set_suspend_via_firmware();
551
552 acpi_pm_start(acpi_state);
553 return 0;
554}
555
556
557
558
559
560
561
562
563
564static int acpi_suspend_enter(suspend_state_t pm_state)
565{
566 acpi_status status = AE_OK;
567 u32 acpi_state = acpi_target_sleep_state;
568 int error;
569
570 ACPI_FLUSH_CPU_CACHE();
571
572 trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true);
573 switch (acpi_state) {
574 case ACPI_STATE_S1:
575 barrier();
576 status = acpi_enter_sleep_state(acpi_state);
577 break;
578
579 case ACPI_STATE_S3:
580 if (!acpi_suspend_lowlevel)
581 return -ENOSYS;
582 error = acpi_suspend_lowlevel();
583 if (error)
584 return error;
585 pr_info(PREFIX "Low-level resume complete\n");
586 pm_set_resume_via_firmware();
587 break;
588 }
589 trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false);
590
591
592 acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
593
594
595 acpi_leave_sleep_state_prep(acpi_state);
596
597
598
599
600
601
602
603
604
605
606 if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) {
607 acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED;
608
609 acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status);
610
611 if (pwr_btn_status & ACPI_EVENT_FLAG_STATUS_SET) {
612 acpi_clear_event(ACPI_EVENT_POWER_BUTTON);
613
614 pwr_btn_event_pending = true;
615 }
616 }
617
618
619
620
621
622
623 acpi_disable_all_gpes();
624
625 acpi_ec_unblock_transactions();
626
627 suspend_nvs_restore();
628
629 return ACPI_SUCCESS(status) ? 0 : -EFAULT;
630}
631
632static int acpi_suspend_state_valid(suspend_state_t pm_state)
633{
634 u32 acpi_state;
635
636 switch (pm_state) {
637 case PM_SUSPEND_ON:
638 case PM_SUSPEND_STANDBY:
639 case PM_SUSPEND_MEM:
640 acpi_state = acpi_suspend_states[pm_state];
641
642 return sleep_states[acpi_state];
643 default:
644 return 0;
645 }
646}
647
648static const struct platform_suspend_ops acpi_suspend_ops = {
649 .valid = acpi_suspend_state_valid,
650 .begin = acpi_suspend_begin,
651 .prepare_late = acpi_pm_prepare,
652 .enter = acpi_suspend_enter,
653 .wake = acpi_pm_finish,
654 .end = acpi_pm_end,
655};
656
657
658
659
660
661
662
663static int acpi_suspend_begin_old(suspend_state_t pm_state)
664{
665 int error = acpi_suspend_begin(pm_state);
666 if (!error)
667 error = __acpi_pm_prepare();
668
669 return error;
670}
671
672
673
674
675
676static const struct platform_suspend_ops acpi_suspend_ops_old = {
677 .valid = acpi_suspend_state_valid,
678 .begin = acpi_suspend_begin_old,
679 .prepare_late = acpi_pm_pre_suspend,
680 .enter = acpi_suspend_enter,
681 .wake = acpi_pm_finish,
682 .end = acpi_pm_end,
683 .recover = acpi_pm_finish,
684};
685
686static bool s2idle_wakeup;
687
688
689
690
691
692
693
694
695
696
697static const struct acpi_device_id lps0_device_ids[] = {
698 {"PNP0D80", },
699 {"", },
700};
701
702#define ACPI_LPS0_DSM_UUID "c4eb40a0-6cd2-11e2-bcfd-0800200c9a66"
703
704#define ACPI_LPS0_GET_DEVICE_CONSTRAINTS 1
705#define ACPI_LPS0_SCREEN_OFF 3
706#define ACPI_LPS0_SCREEN_ON 4
707#define ACPI_LPS0_ENTRY 5
708#define ACPI_LPS0_EXIT 6
709
710static acpi_handle lps0_device_handle;
711static guid_t lps0_dsm_guid;
712static char lps0_dsm_func_mask;
713
714
715struct lpi_device_info {
716 char *name;
717 int enabled;
718 union acpi_object *package;
719};
720
721
722struct lpi_device_constraint {
723 int uid;
724 int min_dstate;
725 int function_states;
726};
727
728struct lpi_constraints {
729 acpi_handle handle;
730 int min_dstate;
731};
732
733static struct lpi_constraints *lpi_constraints_table;
734static int lpi_constraints_table_size;
735
736static void lpi_device_get_constraints(void)
737{
738 union acpi_object *out_obj;
739 int i;
740
741 out_obj = acpi_evaluate_dsm_typed(lps0_device_handle, &lps0_dsm_guid,
742 1, ACPI_LPS0_GET_DEVICE_CONSTRAINTS,
743 NULL, ACPI_TYPE_PACKAGE);
744
745 acpi_handle_debug(lps0_device_handle, "_DSM function 1 eval %s\n",
746 out_obj ? "successful" : "failed");
747
748 if (!out_obj)
749 return;
750
751 lpi_constraints_table = kcalloc(out_obj->package.count,
752 sizeof(*lpi_constraints_table),
753 GFP_KERNEL);
754 if (!lpi_constraints_table)
755 goto free_acpi_buffer;
756
757 acpi_handle_debug(lps0_device_handle, "LPI: constraints list begin:\n");
758
759 for (i = 0; i < out_obj->package.count; i++) {
760 struct lpi_constraints *constraint;
761 acpi_status status;
762 union acpi_object *package = &out_obj->package.elements[i];
763 struct lpi_device_info info = { };
764 int package_count = 0, j;
765
766 if (!package)
767 continue;
768
769 for (j = 0; j < package->package.count; ++j) {
770 union acpi_object *element =
771 &(package->package.elements[j]);
772
773 switch (element->type) {
774 case ACPI_TYPE_INTEGER:
775 info.enabled = element->integer.value;
776 break;
777 case ACPI_TYPE_STRING:
778 info.name = element->string.pointer;
779 break;
780 case ACPI_TYPE_PACKAGE:
781 package_count = element->package.count;
782 info.package = element->package.elements;
783 break;
784 }
785 }
786
787 if (!info.enabled || !info.package || !info.name)
788 continue;
789
790 constraint = &lpi_constraints_table[lpi_constraints_table_size];
791
792 status = acpi_get_handle(NULL, info.name, &constraint->handle);
793 if (ACPI_FAILURE(status))
794 continue;
795
796 acpi_handle_debug(lps0_device_handle,
797 "index:%d Name:%s\n", i, info.name);
798
799 constraint->min_dstate = -1;
800
801 for (j = 0; j < package_count; ++j) {
802 union acpi_object *info_obj = &info.package[j];
803 union acpi_object *cnstr_pkg;
804 union acpi_object *obj;
805 struct lpi_device_constraint dev_info;
806
807 switch (info_obj->type) {
808 case ACPI_TYPE_INTEGER:
809
810 break;
811 case ACPI_TYPE_PACKAGE:
812 if (info_obj->package.count < 2)
813 break;
814
815 cnstr_pkg = info_obj->package.elements;
816 obj = &cnstr_pkg[0];
817 dev_info.uid = obj->integer.value;
818 obj = &cnstr_pkg[1];
819 dev_info.min_dstate = obj->integer.value;
820
821 acpi_handle_debug(lps0_device_handle,
822 "uid:%d min_dstate:%s\n",
823 dev_info.uid,
824 acpi_power_state_string(dev_info.min_dstate));
825
826 constraint->min_dstate = dev_info.min_dstate;
827 break;
828 }
829 }
830
831 if (constraint->min_dstate < 0) {
832 acpi_handle_debug(lps0_device_handle,
833 "Incomplete constraint defined\n");
834 continue;
835 }
836
837 lpi_constraints_table_size++;
838 }
839
840 acpi_handle_debug(lps0_device_handle, "LPI: constraints list end\n");
841
842free_acpi_buffer:
843 ACPI_FREE(out_obj);
844}
845
846static void lpi_check_constraints(void)
847{
848 int i;
849
850 for (i = 0; i < lpi_constraints_table_size; ++i) {
851 acpi_handle handle = lpi_constraints_table[i].handle;
852 struct acpi_device *adev;
853
854 if (!handle || acpi_bus_get_device(handle, &adev))
855 continue;
856
857 acpi_handle_debug(handle,
858 "LPI: required min power state:%s current power state:%s\n",
859 acpi_power_state_string(lpi_constraints_table[i].min_dstate),
860 acpi_power_state_string(adev->power.state));
861
862 if (!adev->flags.power_manageable) {
863 acpi_handle_info(handle, "LPI: Device not power manageable\n");
864 lpi_constraints_table[i].handle = NULL;
865 continue;
866 }
867
868 if (adev->power.state < lpi_constraints_table[i].min_dstate)
869 acpi_handle_info(handle,
870 "LPI: Constraint not met; min power state:%s current power state:%s\n",
871 acpi_power_state_string(lpi_constraints_table[i].min_dstate),
872 acpi_power_state_string(adev->power.state));
873 }
874}
875
876static void acpi_sleep_run_lps0_dsm(unsigned int func)
877{
878 union acpi_object *out_obj;
879
880 if (!(lps0_dsm_func_mask & (1 << func)))
881 return;
882
883 out_obj = acpi_evaluate_dsm(lps0_device_handle, &lps0_dsm_guid, 1, func, NULL);
884 ACPI_FREE(out_obj);
885
886 acpi_handle_debug(lps0_device_handle, "_DSM function %u evaluation %s\n",
887 func, out_obj ? "successful" : "failed");
888}
889
890static int lps0_device_attach(struct acpi_device *adev,
891 const struct acpi_device_id *not_used)
892{
893 union acpi_object *out_obj;
894
895 if (lps0_device_handle)
896 return 0;
897
898 if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0))
899 return 0;
900
901 guid_parse(ACPI_LPS0_DSM_UUID, &lps0_dsm_guid);
902
903 out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 1, 0, NULL);
904 if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER) {
905 acpi_handle_debug(adev->handle,
906 "_DSM function 0 evaluation failed\n");
907 return 0;
908 }
909
910 lps0_dsm_func_mask = *(char *)out_obj->buffer.pointer;
911
912 ACPI_FREE(out_obj);
913
914 acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n",
915 lps0_dsm_func_mask);
916
917 lps0_device_handle = adev->handle;
918
919 lpi_device_get_constraints();
920
921
922
923
924
925 if (mem_sleep_default > PM_SUSPEND_MEM && !acpi_sleep_default_s3)
926 mem_sleep_current = PM_SUSPEND_TO_IDLE;
927
928
929
930
931
932
933 acpi_ec_mark_gpe_for_wake();
934
935 return 0;
936}
937
938static struct acpi_scan_handler lps0_handler = {
939 .ids = lps0_device_ids,
940 .attach = lps0_device_attach,
941};
942
943static int acpi_s2idle_begin(void)
944{
945 acpi_scan_lock_acquire();
946 return 0;
947}
948
949static int acpi_s2idle_prepare(void)
950{
951 if (acpi_sci_irq_valid()) {
952 enable_irq_wake(acpi_sci_irq);
953 acpi_ec_set_gpe_wake_mask(ACPI_GPE_ENABLE);
954 }
955
956 acpi_enable_wakeup_devices(ACPI_STATE_S0);
957
958
959 acpi_enable_all_wakeup_gpes();
960 acpi_os_wait_events_complete();
961
962 s2idle_wakeup = true;
963 return 0;
964}
965
966static int acpi_s2idle_prepare_late(void)
967{
968 if (!lps0_device_handle || sleep_no_lps0)
969 return 0;
970
971 if (pm_debug_messages_on)
972 lpi_check_constraints();
973
974 acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF);
975 acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY);
976
977 return 0;
978}
979
980static void acpi_s2idle_sync(void)
981{
982
983
984
985
986 acpi_ec_flush_work();
987 acpi_os_wait_events_complete();
988}
989
990static void acpi_s2idle_wake(void)
991{
992
993
994
995
996 if (!acpi_sci_irq_valid() ||
997 irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq)))
998 return;
999
1000
1001
1002
1003
1004 if (acpi_ec_dispatch_gpe()) {
1005
1006
1007
1008
1009
1010
1011
1012
1013 pm_system_cancel_wakeup();
1014
1015 acpi_s2idle_sync();
1016
1017 rearm_wake_irq(acpi_sci_irq);
1018 }
1019}
1020
1021static void acpi_s2idle_restore_early(void)
1022{
1023 if (!lps0_device_handle || sleep_no_lps0)
1024 return;
1025
1026 acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT);
1027 acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON);
1028}
1029
1030static void acpi_s2idle_restore(void)
1031{
1032
1033
1034
1035
1036 acpi_os_wait_events_complete();
1037 acpi_s2idle_sync();
1038
1039 s2idle_wakeup = false;
1040
1041 acpi_enable_all_runtime_gpes();
1042
1043 acpi_disable_wakeup_devices(ACPI_STATE_S0);
1044
1045 if (acpi_sci_irq_valid()) {
1046 acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE);
1047 disable_irq_wake(acpi_sci_irq);
1048 }
1049}
1050
1051static void acpi_s2idle_end(void)
1052{
1053 acpi_scan_lock_release();
1054}
1055
1056static const struct platform_s2idle_ops acpi_s2idle_ops = {
1057 .begin = acpi_s2idle_begin,
1058 .prepare = acpi_s2idle_prepare,
1059 .prepare_late = acpi_s2idle_prepare_late,
1060 .wake = acpi_s2idle_wake,
1061 .restore_early = acpi_s2idle_restore_early,
1062 .restore = acpi_s2idle_restore,
1063 .end = acpi_s2idle_end,
1064};
1065
1066static void acpi_sleep_suspend_setup(void)
1067{
1068 int i;
1069
1070 for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++)
1071 if (acpi_sleep_state_supported(i))
1072 sleep_states[i] = 1;
1073
1074 suspend_set_ops(old_suspend_ordering ?
1075 &acpi_suspend_ops_old : &acpi_suspend_ops);
1076
1077 acpi_scan_add_handler(&lps0_handler);
1078 s2idle_set_ops(&acpi_s2idle_ops);
1079}
1080
1081#else
1082#define s2idle_wakeup (false)
1083#define lps0_device_handle (NULL)
1084static inline void acpi_sleep_suspend_setup(void) {}
1085#endif
1086
1087bool acpi_s2idle_wakeup(void)
1088{
1089 return s2idle_wakeup;
1090}
1091
1092#ifdef CONFIG_PM_SLEEP
1093static u32 saved_bm_rld;
1094
1095static int acpi_save_bm_rld(void)
1096{
1097 acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld);
1098 return 0;
1099}
1100
1101static void acpi_restore_bm_rld(void)
1102{
1103 u32 resumed_bm_rld = 0;
1104
1105 acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld);
1106 if (resumed_bm_rld == saved_bm_rld)
1107 return;
1108
1109 acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld);
1110}
1111
1112static struct syscore_ops acpi_sleep_syscore_ops = {
1113 .suspend = acpi_save_bm_rld,
1114 .resume = acpi_restore_bm_rld,
1115};
1116
1117static void acpi_sleep_syscore_init(void)
1118{
1119 register_syscore_ops(&acpi_sleep_syscore_ops);
1120}
1121#else
1122static inline void acpi_sleep_syscore_init(void) {}
1123#endif
1124
1125#ifdef CONFIG_HIBERNATION
1126static unsigned long s4_hardware_signature;
1127static struct acpi_table_facs *facs;
1128static bool nosigcheck;
1129
1130void __init acpi_no_s4_hw_signature(void)
1131{
1132 nosigcheck = true;
1133}
1134
1135static int acpi_hibernation_begin(pm_message_t stage)
1136{
1137 if (!nvs_nosave) {
1138 int error = suspend_nvs_alloc();
1139 if (error)
1140 return error;
1141 }
1142
1143 if (stage.event == PM_EVENT_HIBERNATE)
1144 pm_set_suspend_via_firmware();
1145
1146 acpi_pm_start(ACPI_STATE_S4);
1147 return 0;
1148}
1149
1150static int acpi_hibernation_enter(void)
1151{
1152 acpi_status status = AE_OK;
1153
1154 ACPI_FLUSH_CPU_CACHE();
1155
1156
1157 status = acpi_enter_sleep_state(ACPI_STATE_S4);
1158
1159 acpi_leave_sleep_state_prep(ACPI_STATE_S4);
1160
1161 return ACPI_SUCCESS(status) ? 0 : -EFAULT;
1162}
1163
1164static void acpi_hibernation_leave(void)
1165{
1166 pm_set_resume_via_firmware();
1167
1168
1169
1170
1171 acpi_enable();
1172
1173 acpi_leave_sleep_state_prep(ACPI_STATE_S4);
1174
1175 if (facs && s4_hardware_signature != facs->hardware_signature)
1176 pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n");
1177
1178 suspend_nvs_restore();
1179
1180 acpi_ec_unblock_transactions();
1181}
1182
1183static void acpi_pm_thaw(void)
1184{
1185 acpi_ec_unblock_transactions();
1186 acpi_enable_all_runtime_gpes();
1187}
1188
1189static const struct platform_hibernation_ops acpi_hibernation_ops = {
1190 .begin = acpi_hibernation_begin,
1191 .end = acpi_pm_end,
1192 .pre_snapshot = acpi_pm_prepare,
1193 .finish = acpi_pm_finish,
1194 .prepare = acpi_pm_prepare,
1195 .enter = acpi_hibernation_enter,
1196 .leave = acpi_hibernation_leave,
1197 .pre_restore = acpi_pm_freeze,
1198 .restore_cleanup = acpi_pm_thaw,
1199};
1200
1201
1202
1203
1204
1205
1206
1207static int acpi_hibernation_begin_old(pm_message_t stage)
1208{
1209 int error;
1210
1211
1212
1213
1214
1215 acpi_sleep_tts_switch(ACPI_STATE_S4);
1216
1217 error = acpi_sleep_prepare(ACPI_STATE_S4);
1218 if (error)
1219 return error;
1220
1221 if (!nvs_nosave) {
1222 error = suspend_nvs_alloc();
1223 if (error)
1224 return error;
1225 }
1226
1227 if (stage.event == PM_EVENT_HIBERNATE)
1228 pm_set_suspend_via_firmware();
1229
1230 acpi_target_sleep_state = ACPI_STATE_S4;
1231 acpi_scan_lock_acquire();
1232 return 0;
1233}
1234
1235
1236
1237
1238
1239static const struct platform_hibernation_ops acpi_hibernation_ops_old = {
1240 .begin = acpi_hibernation_begin_old,
1241 .end = acpi_pm_end,
1242 .pre_snapshot = acpi_pm_pre_suspend,
1243 .prepare = acpi_pm_freeze,
1244 .finish = acpi_pm_finish,
1245 .enter = acpi_hibernation_enter,
1246 .leave = acpi_hibernation_leave,
1247 .pre_restore = acpi_pm_freeze,
1248 .restore_cleanup = acpi_pm_thaw,
1249 .recover = acpi_pm_finish,
1250};
1251
1252static void acpi_sleep_hibernate_setup(void)
1253{
1254 if (!acpi_sleep_state_supported(ACPI_STATE_S4))
1255 return;
1256
1257 hibernation_set_ops(old_suspend_ordering ?
1258 &acpi_hibernation_ops_old : &acpi_hibernation_ops);
1259 sleep_states[ACPI_STATE_S4] = 1;
1260 if (nosigcheck)
1261 return;
1262
1263 acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs);
1264 if (facs)
1265 s4_hardware_signature = facs->hardware_signature;
1266}
1267#else
1268static inline void acpi_sleep_hibernate_setup(void) {}
1269#endif
1270
1271static void acpi_power_off_prepare(void)
1272{
1273
1274 acpi_sleep_prepare(ACPI_STATE_S5);
1275 acpi_disable_all_gpes();
1276 acpi_os_wait_events_complete();
1277}
1278
1279static void acpi_power_off(void)
1280{
1281
1282 printk(KERN_DEBUG "%s called\n", __func__);
1283 local_irq_disable();
1284 acpi_enter_sleep_state(ACPI_STATE_S5);
1285}
1286
1287int __init acpi_sleep_init(void)
1288{
1289 char supported[ACPI_S_STATE_COUNT * 3 + 1];
1290 char *pos = supported;
1291 int i;
1292
1293 acpi_sleep_dmi_check();
1294
1295 sleep_states[ACPI_STATE_S0] = 1;
1296
1297 acpi_sleep_syscore_init();
1298 acpi_sleep_suspend_setup();
1299 acpi_sleep_hibernate_setup();
1300
1301 if (acpi_sleep_state_supported(ACPI_STATE_S5)) {
1302 sleep_states[ACPI_STATE_S5] = 1;
1303 pm_power_off_prepare = acpi_power_off_prepare;
1304 pm_power_off = acpi_power_off;
1305 } else {
1306 acpi_no_s5 = true;
1307 }
1308
1309 supported[0] = 0;
1310 for (i = 0; i < ACPI_S_STATE_COUNT; i++) {
1311 if (sleep_states[i])
1312 pos += sprintf(pos, " S%d", i);
1313 }
1314 pr_info(PREFIX "(supports%s)\n", supported);
1315
1316
1317
1318
1319
1320 register_reboot_notifier(&tts_notifier);
1321 return 0;
1322}
1323