Commit | Line | Data |
---|---|---|
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 | ||
f5ee87df HG |
11 | #define pr_fmt(fmt) "ACPI: PM: " fmt |
12 | ||
1da177e4 LT |
13 | #include <linux/delay.h> |
14 | #include <linux/irq.h> | |
15 | #include <linux/dmi.h> | |
16 | #include <linux/device.h> | |
a8d46b9e | 17 | #include <linux/interrupt.h> |
1da177e4 | 18 | #include <linux/suspend.h> |
e49f711c | 19 | #include <linux/reboot.h> |
d1ee4335 | 20 | #include <linux/acpi.h> |
a2ef5c4f | 21 | #include <linux/module.h> |
504997cf | 22 | #include <linux/syscore_ops.h> |
f216cc37 | 23 | #include <asm/io.h> |
bb3632c6 | 24 | #include <trace/events/power.h> |
f216cc37 | 25 | |
e60cc7a6 | 26 | #include "internal.h" |
1da177e4 LT |
27 | #include "sleep.h" |
28 | ||
13737181 CY |
29 | /* |
30 | * Some HW-full platforms do not have _S5, so they may need | |
31 | * to leverage efi power off for a shutdown. | |
32 | */ | |
33 | bool acpi_no_s5; | |
01eac60b | 34 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
1da177e4 | 35 | |
e49f711c ZY |
36 | static void acpi_sleep_tts_switch(u32 acpi_state) |
37 | { | |
0db98202 | 38 | acpi_status status; |
e49f711c | 39 | |
0db98202 | 40 | status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state); |
e49f711c ZY |
41 | 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 | */ | |
f5ee87df | 46 | pr_notice("Failure in evaluating _TTS object\n"); |
e49f711c ZY |
47 | } |
48 | } | |
49 | ||
9713adc2 | 50 | static int tts_notify_reboot(struct notifier_block *this, |
e49f711c ZY |
51 | unsigned long code, void *x) |
52 | { | |
53 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
54 | return NOTIFY_DONE; | |
55 | } | |
56 | ||
9713adc2 RW |
57 | static struct notifier_block tts_notifier = { |
58 | .notifier_call = tts_notify_reboot, | |
e49f711c ZY |
59 | .next = NULL, |
60 | .priority = 0, | |
61 | }; | |
62 | ||
c9b6c8f6 | 63 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
64 | { |
65 | #ifdef CONFIG_ACPI_SLEEP | |
8c53b318 SC |
66 | unsigned long acpi_wakeup_address; |
67 | ||
2f3f2226 AS |
68 | /* do we have a wakeup address for S2 and S3? */ |
69 | if (acpi_state == ACPI_STATE_S3) { | |
8c53b318 | 70 | acpi_wakeup_address = acpi_get_wakeup_address(); |
319b6ffc | 71 | if (!acpi_wakeup_address) |
2f3f2226 | 72 | return -EFAULT; |
e3e9b577 | 73 | acpi_set_waking_vector(acpi_wakeup_address); |
2f3f2226 AS |
74 | |
75 | } | |
2f3f2226 | 76 | #endif |
f5ee87df | 77 | pr_info("Preparing to enter system sleep state S%d\n", 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 |
091aad6a | 95 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
a6ae7594 RW |
96 | |
97 | u32 acpi_target_system_state(void) | |
98 | { | |
99 | return acpi_target_sleep_state; | |
100 | } | |
fad16dd9 | 101 | EXPORT_SYMBOL_GPL(acpi_target_system_state); |
a6ae7594 | 102 | |
a5ca7345 | 103 | static bool pwr_btn_event_pending; |
091aad6a | 104 | |
72ad5d77 RW |
105 | /* |
106 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
107 | * and to restore them during the subsequent resume. Windows does that also for | |
108 | * suspend to RAM. However, it is known that this mechanism does not work on | |
109 | * all machines, so we allow the user to disable it with the help of the | |
110 | * 'acpi_sleep=nonvs' kernel command line option. | |
111 | */ | |
112 | static bool nvs_nosave; | |
113 | ||
114 | void __init acpi_nvs_nosave(void) | |
115 | { | |
116 | nvs_nosave = true; | |
117 | } | |
118 | ||
1bad2f19 KCA |
119 | /* |
120 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
121 | * but says nothing about saving NVS during S3. Not all versions of Windows | |
122 | * save NVS on S3 suspend either, and it is clear that not all systems need | |
123 | * NVS to be saved at S3 time. To improve suspend/resume time, allow the | |
124 | * user to disable saving NVS on S3 if their system does not require it, but | |
125 | * continue to save/restore NVS for S4 as specified. | |
126 | */ | |
127 | static bool nvs_nosave_s3; | |
128 | ||
129 | void __init acpi_nvs_nosave_s3(void) | |
130 | { | |
131 | nvs_nosave_s3 = true; | |
132 | } | |
133 | ||
cbc00c13 ZR |
134 | static int __init init_nvs_save_s3(const struct dmi_system_id *d) |
135 | { | |
136 | nvs_nosave_s3 = false; | |
137 | return 0; | |
138 | } | |
139 | ||
d8f3de0d RW |
140 | /* |
141 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
142 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
143 | * kernel command line option that causes the following variable to be set. | |
144 | */ | |
145 | static bool old_suspend_ordering; | |
146 | ||
147 | void __init acpi_old_suspend_ordering(void) | |
148 | { | |
149 | old_suspend_ordering = true; | |
150 | } | |
151 | ||
0ac1b1d7 ZR |
152 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
153 | { | |
154 | acpi_old_suspend_ordering(); | |
155 | return 0; | |
156 | } | |
157 | ||
158 | static int __init init_nvs_nosave(const struct dmi_system_id *d) | |
159 | { | |
160 | acpi_nvs_nosave(); | |
161 | return 0; | |
162 | } | |
163 | ||
fef98671 | 164 | bool acpi_sleep_default_s3; |
71630b7a | 165 | |
068b47d0 | 166 | static int __init init_default_s3(const struct dmi_system_id *d) |
71630b7a | 167 | { |
068b47d0 | 168 | acpi_sleep_default_s3 = true; |
71630b7a RW |
169 | return 0; |
170 | } | |
171 | ||
6faadbbb | 172 | static const struct dmi_system_id acpisleep_dmi_table[] __initconst = { |
0ac1b1d7 ZR |
173 | { |
174 | .callback = init_old_suspend_ordering, | |
175 | .ident = "Abit KN9 (nForce4 variant)", | |
176 | .matches = { | |
177 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
178 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
179 | }, | |
180 | }, | |
181 | { | |
182 | .callback = init_old_suspend_ordering, | |
183 | .ident = "HP xw4600 Workstation", | |
184 | .matches = { | |
185 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
186 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
187 | }, | |
188 | }, | |
189 | { | |
190 | .callback = init_old_suspend_ordering, | |
191 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
192 | .matches = { | |
193 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
194 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
195 | }, | |
196 | }, | |
197 | { | |
198 | .callback = init_old_suspend_ordering, | |
199 | .ident = "Panasonic CF51-2L", | |
200 | .matches = { | |
201 | DMI_MATCH(DMI_BOARD_VENDOR, | |
202 | "Matsushita Electric Industrial Co.,Ltd."), | |
203 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
204 | }, | |
205 | }, | |
206 | { | |
207 | .callback = init_nvs_nosave, | |
66f2fda9 JS |
208 | .ident = "Sony Vaio VGN-FW41E_H", |
209 | .matches = { | |
210 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
211 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"), | |
212 | }, | |
213 | }, | |
214 | { | |
215 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
216 | .ident = "Sony Vaio VGN-FW21E", |
217 | .matches = { | |
218 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
219 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
220 | }, | |
221 | }, | |
222 | { | |
223 | .callback = init_nvs_nosave, | |
469dd1c4 FV |
224 | .ident = "Sony Vaio VGN-FW21M", |
225 | .matches = { | |
226 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
227 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"), | |
228 | }, | |
229 | }, | |
230 | { | |
231 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
232 | .ident = "Sony Vaio VPCEB17FX", |
233 | .matches = { | |
234 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
235 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
236 | }, | |
237 | }, | |
238 | { | |
239 | .callback = init_nvs_nosave, | |
240 | .ident = "Sony Vaio VGN-SR11M", | |
241 | .matches = { | |
242 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
243 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
244 | }, | |
245 | }, | |
246 | { | |
247 | .callback = init_nvs_nosave, | |
248 | .ident = "Everex StepNote Series", | |
249 | .matches = { | |
250 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
251 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
252 | }, | |
253 | }, | |
254 | { | |
255 | .callback = init_nvs_nosave, | |
256 | .ident = "Sony Vaio VPCEB1Z1E", | |
257 | .matches = { | |
258 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
259 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
260 | }, | |
261 | }, | |
262 | { | |
263 | .callback = init_nvs_nosave, | |
264 | .ident = "Sony Vaio VGN-NW130D", | |
265 | .matches = { | |
266 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
267 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
268 | }, | |
269 | }, | |
270 | { | |
271 | .callback = init_nvs_nosave, | |
272 | .ident = "Sony Vaio VPCCW29FX", | |
273 | .matches = { | |
274 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
275 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
276 | }, | |
277 | }, | |
278 | { | |
279 | .callback = init_nvs_nosave, | |
280 | .ident = "Averatec AV1020-ED2", | |
281 | .matches = { | |
282 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
283 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
284 | }, | |
285 | }, | |
286 | { | |
287 | .callback = init_old_suspend_ordering, | |
288 | .ident = "Asus A8N-SLI DELUXE", | |
289 | .matches = { | |
290 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
291 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
292 | }, | |
293 | }, | |
294 | { | |
295 | .callback = init_old_suspend_ordering, | |
296 | .ident = "Asus A8N-SLI Premium", | |
297 | .matches = { | |
298 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
299 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
300 | }, | |
301 | }, | |
302 | { | |
303 | .callback = init_nvs_nosave, | |
304 | .ident = "Sony Vaio VGN-SR26GN_P", | |
305 | .matches = { | |
306 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
307 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
308 | }, | |
309 | }, | |
310 | { | |
311 | .callback = init_nvs_nosave, | |
312 | .ident = "Sony Vaio VPCEB1S1E", | |
313 | .matches = { | |
314 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
315 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), | |
316 | }, | |
317 | }, | |
318 | { | |
319 | .callback = init_nvs_nosave, | |
320 | .ident = "Sony Vaio VGN-FW520F", | |
321 | .matches = { | |
322 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
323 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
324 | }, | |
325 | }, | |
326 | { | |
327 | .callback = init_nvs_nosave, | |
328 | .ident = "Asus K54C", | |
329 | .matches = { | |
330 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
331 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
332 | }, | |
333 | }, | |
334 | { | |
335 | .callback = init_nvs_nosave, | |
336 | .ident = "Asus K54HR", | |
337 | .matches = { | |
338 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
339 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
340 | }, | |
341 | }, | |
231f9415 WT |
342 | { |
343 | .callback = init_nvs_save_s3, | |
344 | .ident = "Asus 1025C", | |
345 | .matches = { | |
346 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
347 | DMI_MATCH(DMI_PRODUCT_NAME, "1025C"), | |
348 | }, | |
349 | }, | |
cbc00c13 ZR |
350 | /* |
351 | * https://bugzilla.kernel.org/show_bug.cgi?id=189431 | |
352 | * Lenovo G50-45 is a platform later than 2012, but needs nvs memory | |
353 | * saving during S3. | |
354 | */ | |
355 | { | |
356 | .callback = init_nvs_save_s3, | |
357 | .ident = "Lenovo G50-45", | |
358 | .matches = { | |
359 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
360 | DMI_MATCH(DMI_PRODUCT_NAME, "80E3"), | |
361 | }, | |
362 | }, | |
855c1c2f CY |
363 | /* |
364 | * ThinkPad X1 Tablet(2016) cannot do suspend-to-idle using | |
365 | * the Low Power S0 Idle firmware interface (see | |
366 | * https://bugzilla.kernel.org/show_bug.cgi?id=199057). | |
367 | */ | |
368 | { | |
068b47d0 | 369 | .callback = init_default_s3, |
855c1c2f CY |
370 | .ident = "ThinkPad X1 Tablet(2016)", |
371 | .matches = { | |
372 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
373 | DMI_MATCH(DMI_PRODUCT_NAME, "20GGA00L00"), | |
374 | }, | |
375 | }, | |
0ac1b1d7 ZR |
376 | {}, |
377 | }; | |
378 | ||
57044031 RW |
379 | static bool ignore_blacklist; |
380 | ||
381 | void __init acpi_sleep_no_blacklist(void) | |
382 | { | |
383 | ignore_blacklist = true; | |
384 | } | |
385 | ||
8b691c9c | 386 | static void __init acpi_sleep_dmi_check(void) |
0ac1b1d7 | 387 | { |
57044031 RW |
388 | if (ignore_blacklist) |
389 | return; | |
390 | ||
9c0a30b6 | 391 | if (dmi_get_bios_year() >= 2012) |
821d6f03 LT |
392 | acpi_nvs_nosave_s3(); |
393 | ||
0ac1b1d7 ZR |
394 | dmi_check_system(acpisleep_dmi_table); |
395 | } | |
396 | ||
d8f3de0d | 397 | /** |
d5a64513 | 398 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 399 | */ |
d5a64513 | 400 | static int acpi_pm_freeze(void) |
d8f3de0d | 401 | { |
3d97e426 | 402 | acpi_disable_all_gpes(); |
bd6f10a5 | 403 | acpi_os_wait_events_complete(); |
fe955682 | 404 | acpi_ec_block_transactions(); |
d8f3de0d RW |
405 | return 0; |
406 | } | |
407 | ||
c5f7a1bb | 408 | /** |
aa3a522c | 409 | * acpi_pm_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. |
c5f7a1bb RW |
410 | */ |
411 | static int acpi_pm_pre_suspend(void) | |
412 | { | |
413 | acpi_pm_freeze(); | |
26fcaf60 | 414 | return suspend_nvs_save(); |
c5f7a1bb RW |
415 | } |
416 | ||
d8f3de0d RW |
417 | /** |
418 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
419 | * | |
420 | * If necessary, set the firmware waking vector and do arch-specific | |
421 | * nastiness to get the wakeup code to the waking vector. | |
422 | */ | |
423 | static int __acpi_pm_prepare(void) | |
424 | { | |
425 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
426 | if (error) |
427 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 428 | |
d8f3de0d RW |
429 | return error; |
430 | } | |
431 | ||
432 | /** | |
433 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
434 | * state and disable the GPEs. | |
435 | */ | |
436 | static int acpi_pm_prepare(void) | |
437 | { | |
438 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 439 | if (!error) |
26fcaf60 | 440 | error = acpi_pm_pre_suspend(); |
d5a64513 | 441 | |
d8f3de0d RW |
442 | return error; |
443 | } | |
444 | ||
445 | /** | |
446 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
447 | * | |
448 | * This is called after we wake back up (or if entering the sleep state | |
449 | * failed). | |
450 | */ | |
451 | static void acpi_pm_finish(void) | |
452 | { | |
a3487d8f | 453 | struct acpi_device *pwr_btn_adev; |
d8f3de0d RW |
454 | u32 acpi_state = acpi_target_sleep_state; |
455 | ||
42de5532 | 456 | acpi_ec_unblock_transactions(); |
d551d81d | 457 | suspend_nvs_free(); |
2a6b6976 | 458 | |
d8f3de0d RW |
459 | if (acpi_state == ACPI_STATE_S0) |
460 | return; | |
1da177e4 | 461 | |
f5ee87df | 462 | pr_info("Waking up from system sleep state S%d\n", acpi_state); |
78f5f023 | 463 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
464 | acpi_leave_sleep_state(acpi_state); |
465 | ||
466 | /* reset firmware waking vector */ | |
e3e9b577 | 467 | acpi_set_waking_vector(0); |
d8f3de0d RW |
468 | |
469 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c10d7a13 | 470 | |
781d737c RW |
471 | acpi_resume_power_resources(); |
472 | ||
c10d7a13 DD |
473 | /* If we were woken with the fixed power button, provide a small |
474 | * hint to userspace in the form of a wakeup event on the fixed power | |
475 | * button device (if it can be found). | |
476 | * | |
477 | * We delay the event generation til now, as the PM layer requires | |
478 | * timekeeping to be running before we generate events. */ | |
479 | if (!pwr_btn_event_pending) | |
480 | return; | |
481 | ||
482 | pwr_btn_event_pending = false; | |
a3487d8f AS |
483 | pwr_btn_adev = acpi_dev_get_first_match_dev(ACPI_BUTTON_HID_POWERF, |
484 | NULL, -1); | |
485 | if (pwr_btn_adev) { | |
486 | pm_wakeup_event(&pwr_btn_adev->dev, 0); | |
487 | acpi_dev_put(pwr_btn_adev); | |
c10d7a13 | 488 | } |
d8f3de0d RW |
489 | } |
490 | ||
491 | /** | |
ad07277e RW |
492 | * acpi_pm_start - Start system PM transition. |
493 | */ | |
494 | static void acpi_pm_start(u32 acpi_state) | |
495 | { | |
496 | acpi_target_sleep_state = acpi_state; | |
497 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
498 | acpi_scan_lock_acquire(); | |
499 | } | |
500 | ||
501 | /** | |
502 | * acpi_pm_end - Finish up system PM transition. | |
d8f3de0d RW |
503 | */ |
504 | static void acpi_pm_end(void) | |
505 | { | |
6381195a | 506 | acpi_turn_off_unused_power_resources(); |
ad07277e | 507 | acpi_scan_lock_release(); |
d8f3de0d RW |
508 | /* |
509 | * This is necessary in case acpi_pm_finish() is not called during a | |
510 | * failing transition to a sleep state. | |
511 | */ | |
512 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 513 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 514 | } |
92daa7b5 | 515 | #else /* !CONFIG_ACPI_SLEEP */ |
068b47d0 | 516 | #define sleep_no_lps0 (1) |
92daa7b5 | 517 | #define acpi_target_sleep_state ACPI_STATE_S0 |
068b47d0 | 518 | #define acpi_sleep_default_s3 (1) |
0ac1b1d7 | 519 | static inline void acpi_sleep_dmi_check(void) {} |
5d1e072b | 520 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 521 | |
d8f3de0d | 522 | #ifdef CONFIG_SUSPEND |
1da177e4 | 523 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
524 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
525 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
526 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 527 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
528 | }; |
529 | ||
e9b3aba8 | 530 | /** |
2c6e33c3 | 531 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
532 | * associated with given @pm_state, if supported. |
533 | */ | |
2c6e33c3 | 534 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
535 | { |
536 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
ad07277e | 537 | int error; |
e9b3aba8 | 538 | |
1bad2f19 | 539 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
540 | if (error) |
541 | return error; | |
542 | ||
ad07277e RW |
543 | if (!sleep_states[acpi_state]) { |
544 | pr_err("ACPI does not support sleep state S%u\n", acpi_state); | |
545 | return -ENOSYS; | |
e9b3aba8 | 546 | } |
ef25ba04 RW |
547 | if (acpi_state > ACPI_STATE_S1) |
548 | pm_set_suspend_via_firmware(); | |
ad07277e RW |
549 | |
550 | acpi_pm_start(acpi_state); | |
551 | return 0; | |
e9b3aba8 RW |
552 | } |
553 | ||
1da177e4 | 554 | /** |
2c6e33c3 | 555 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 556 | * @pm_state: ignored |
1da177e4 | 557 | * |
50ad147a RW |
558 | * Flush caches and go to sleep. For STR we have to call arch-specific |
559 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
560 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
561 | */ | |
2c6e33c3 | 562 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
563 | { |
564 | acpi_status status = AE_OK; | |
e9b3aba8 | 565 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 566 | int error; |
1da177e4 | 567 | |
bb3632c6 | 568 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true); |
e9b3aba8 RW |
569 | switch (acpi_state) { |
570 | case ACPI_STATE_S1: | |
1da177e4 | 571 | barrier(); |
3f6f49c7 | 572 | status = acpi_enter_sleep_state(acpi_state); |
1da177e4 LT |
573 | break; |
574 | ||
e9b3aba8 | 575 | case ACPI_STATE_S3: |
d6a77ead KRW |
576 | if (!acpi_suspend_lowlevel) |
577 | return -ENOSYS; | |
f1a2003e | 578 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
579 | if (error) |
580 | return error; | |
f5ee87df | 581 | pr_info("Low-level resume complete\n"); |
ef25ba04 | 582 | pm_set_resume_via_firmware(); |
1da177e4 | 583 | break; |
1da177e4 | 584 | } |
bb3632c6 | 585 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false); |
872d83d0 | 586 | |
b6dacf63 MG |
587 | /* This violates the spec but is required for bug compatibility. */ |
588 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 589 | |
3f6f49c7 LB |
590 | /* Reprogram control registers */ |
591 | acpi_leave_sleep_state_prep(acpi_state); | |
c95d47a8 | 592 | |
23b168d4 | 593 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
594 | * of the OSPM to clear the status bit [ implying that the |
595 | * POWER_BUTTON event should not reach userspace ] | |
c10d7a13 DD |
596 | * |
597 | * However, we do generate a small hint for userspace in the form of | |
598 | * a wakeup event. We flag this condition for now and generate the | |
599 | * event later, as we're currently too early in resume to be able to | |
600 | * generate wakeup events. | |
872d83d0 | 601 | */ |
c10d7a13 | 602 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
51468a9d | 603 | acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED; |
c10d7a13 DD |
604 | |
605 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); | |
606 | ||
18864cc4 | 607 | if (pwr_btn_status & ACPI_EVENT_FLAG_STATUS_SET) { |
c10d7a13 DD |
608 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); |
609 | /* Flag for later */ | |
610 | pwr_btn_event_pending = true; | |
611 | } | |
612 | } | |
872d83d0 | 613 | |
a3627f67 SL |
614 | /* |
615 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
616 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
617 | * acpi_leave_sleep_state will reenable specific GPEs later | |
618 | */ | |
3d97e426 | 619 | acpi_disable_all_gpes(); |
d5a64513 | 620 | /* Allow EC transactions to happen. */ |
c2b46d67 | 621 | acpi_ec_unblock_transactions(); |
a3627f67 | 622 | |
2a6b6976 MG |
623 | suspend_nvs_restore(); |
624 | ||
1da177e4 LT |
625 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
626 | } | |
627 | ||
2c6e33c3 | 628 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 629 | { |
e8c9c502 | 630 | u32 acpi_state; |
eb9289eb | 631 | |
e8c9c502 JB |
632 | switch (pm_state) { |
633 | case PM_SUSPEND_ON: | |
634 | case PM_SUSPEND_STANDBY: | |
635 | case PM_SUSPEND_MEM: | |
636 | acpi_state = acpi_suspend_states[pm_state]; | |
637 | ||
638 | return sleep_states[acpi_state]; | |
639 | default: | |
640 | return 0; | |
641 | } | |
eb9289eb SL |
642 | } |
643 | ||
2f55ac07 | 644 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
645 | .valid = acpi_suspend_state_valid, |
646 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 647 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 648 | .enter = acpi_suspend_enter, |
618d7fd0 | 649 | .wake = acpi_pm_finish, |
d8f3de0d RW |
650 | .end = acpi_pm_end, |
651 | }; | |
652 | ||
653 | /** | |
654 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
655 | * state associated with given @pm_state, if supported, and | |
656 | * execute the _PTS control method. This function is used if the | |
657 | * pre-ACPI 2.0 suspend ordering has been requested. | |
658 | */ | |
659 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
660 | { | |
661 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
662 | if (!error) |
663 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 664 | |
d8f3de0d RW |
665 | return error; |
666 | } | |
667 | ||
668 | /* | |
669 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
670 | * been requested. | |
671 | */ | |
2f55ac07 | 672 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
673 | .valid = acpi_suspend_state_valid, |
674 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 675 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 676 | .enter = acpi_suspend_enter, |
618d7fd0 | 677 | .wake = acpi_pm_finish, |
d8f3de0d RW |
678 | .end = acpi_pm_end, |
679 | .recover = acpi_pm_finish, | |
1da177e4 | 680 | }; |
02040f0b | 681 | |
33e4f80e RW |
682 | static bool s2idle_wakeup; |
683 | ||
fef98671 | 684 | int acpi_s2idle_begin(void) |
1f0b6386 RW |
685 | { |
686 | acpi_scan_lock_acquire(); | |
687 | return 0; | |
688 | } | |
689 | ||
fef98671 | 690 | int acpi_s2idle_prepare(void) |
a8d46b9e | 691 | { |
b90ff355 | 692 | if (acpi_sci_irq_valid()) { |
8c01275e | 693 | enable_irq_wake(acpi_sci_irq); |
b90ff355 RW |
694 | acpi_ec_set_gpe_wake_mask(ACPI_GPE_ENABLE); |
695 | } | |
235d81a6 | 696 | |
2f844b61 RJ |
697 | acpi_enable_wakeup_devices(ACPI_STATE_S0); |
698 | ||
f941d3e4 RW |
699 | /* Change the configuration of GPEs to avoid spurious wakeup. */ |
700 | acpi_enable_all_wakeup_gpes(); | |
701 | acpi_os_wait_events_complete(); | |
41275eb5 RW |
702 | |
703 | s2idle_wakeup = true; | |
a8d46b9e RW |
704 | return 0; |
705 | } | |
706 | ||
fef98671 | 707 | bool acpi_s2idle_wake(void) |
ac9eafbe | 708 | { |
e3728b50 RW |
709 | if (!acpi_sci_irq_valid()) |
710 | return pm_wakeup_pending(); | |
711 | ||
712 | while (pm_wakeup_pending()) { | |
713 | /* | |
714 | * If IRQD_WAKEUP_ARMED is set for the SCI at this point, the | |
715 | * SCI has not triggered while suspended, so bail out (the | |
716 | * wakeup is pending anyway and the SCI is not the source of | |
717 | * it). | |
718 | */ | |
3441362b RW |
719 | if (irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq))) { |
720 | pm_pr_dbg("Wakeup unrelated to ACPI SCI\n"); | |
e3728b50 | 721 | return true; |
3441362b | 722 | } |
e3728b50 | 723 | |
63fb9623 RW |
724 | /* |
725 | * If the status bit of any enabled fixed event is set, the | |
726 | * wakeup is regarded as valid. | |
727 | */ | |
3441362b RW |
728 | if (acpi_any_fixed_event_status_set()) { |
729 | pm_pr_dbg("ACPI fixed event wakeup\n"); | |
63fb9623 | 730 | return true; |
3441362b | 731 | } |
63fb9623 | 732 | |
ddfd9dcf | 733 | /* Check wakeups from drivers sharing the SCI. */ |
3441362b RW |
734 | if (acpi_check_wakeup_handlers()) { |
735 | pm_pr_dbg("ACPI custom handler wakeup\n"); | |
ddfd9dcf | 736 | return true; |
3441362b | 737 | } |
ddfd9dcf | 738 | |
dc0075ba RW |
739 | /* |
740 | * Check non-EC GPE wakeups and if there are none, cancel the | |
741 | * SCI-related wakeup and dispatch the EC GPE. | |
742 | */ | |
3441362b RW |
743 | if (acpi_ec_dispatch_gpe()) { |
744 | pm_pr_dbg("ACPI non-EC GPE wakeup\n"); | |
e3728b50 | 745 | return true; |
3441362b | 746 | } |
56b99184 | 747 | |
607b9df6 | 748 | acpi_os_wait_events_complete(); |
33e4f80e | 749 | |
e3728b50 RW |
750 | /* |
751 | * The SCI is in the "suspended" state now and it cannot produce | |
752 | * new wakeup events till the rearming below, so if any of them | |
753 | * are pending here, they must be resulting from the processing | |
754 | * of EC events above or coming from somewhere else. | |
755 | */ | |
3441362b RW |
756 | if (pm_wakeup_pending()) { |
757 | pm_pr_dbg("Wakeup after ACPI Notify sync\n"); | |
e3728b50 | 758 | return true; |
3441362b | 759 | } |
e3728b50 | 760 | |
631e3893 RW |
761 | pm_pr_dbg("Rearming ACPI SCI for wakeup\n"); |
762 | ||
cb1f65c1 | 763 | pm_wakeup_clear(acpi_sci_irq); |
45dc1576 RW |
764 | rearm_wake_irq(acpi_sci_irq); |
765 | } | |
e3728b50 RW |
766 | |
767 | return false; | |
33e4f80e RW |
768 | } |
769 | ||
fef98671 | 770 | void acpi_s2idle_restore(void) |
a8d46b9e | 771 | { |
024aa873 RW |
772 | /* |
773 | * Drain pending events before restoring the working-state configuration | |
774 | * of GPEs. | |
775 | */ | |
776 | acpi_os_wait_events_complete(); /* synchronize GPE processing */ | |
607b9df6 RW |
777 | acpi_ec_flush_work(); /* flush the EC driver's workqueues */ |
778 | acpi_os_wait_events_complete(); /* synchronize Notify handling */ | |
024aa873 | 779 | |
41275eb5 RW |
780 | s2idle_wakeup = false; |
781 | ||
f941d3e4 RW |
782 | acpi_enable_all_runtime_gpes(); |
783 | ||
2f844b61 RJ |
784 | acpi_disable_wakeup_devices(ACPI_STATE_S0); |
785 | ||
b90ff355 RW |
786 | if (acpi_sci_irq_valid()) { |
787 | acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE); | |
8c01275e | 788 | disable_irq_wake(acpi_sci_irq); |
b90ff355 | 789 | } |
a8d46b9e RW |
790 | } |
791 | ||
fef98671 | 792 | void acpi_s2idle_end(void) |
1f0b6386 RW |
793 | { |
794 | acpi_scan_lock_release(); | |
795 | } | |
796 | ||
23d5855f RW |
797 | static const struct platform_s2idle_ops acpi_s2idle_ops = { |
798 | .begin = acpi_s2idle_begin, | |
799 | .prepare = acpi_s2idle_prepare, | |
800 | .wake = acpi_s2idle_wake, | |
23d5855f RW |
801 | .restore = acpi_s2idle_restore, |
802 | .end = acpi_s2idle_end, | |
1f0b6386 RW |
803 | }; |
804 | ||
fef98671 RW |
805 | void __weak acpi_s2idle_setup(void) |
806 | { | |
807 | s2idle_set_ops(&acpi_s2idle_ops); | |
808 | } | |
809 | ||
02040f0b RW |
810 | static void acpi_sleep_suspend_setup(void) |
811 | { | |
d69d1f70 | 812 | bool suspend_ops_needed = false; |
02040f0b RW |
813 | int i; |
814 | ||
a4e90bed | 815 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) |
d69d1f70 | 816 | if (acpi_sleep_state_supported(i)) { |
02040f0b | 817 | sleep_states[i] = 1; |
d69d1f70 RW |
818 | suspend_ops_needed = true; |
819 | } | |
02040f0b | 820 | |
d69d1f70 RW |
821 | if (suspend_ops_needed) |
822 | suspend_set_ops(old_suspend_ordering ? | |
823 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
8110dd28 | 824 | |
fef98671 | 825 | acpi_s2idle_setup(); |
02040f0b | 826 | } |
1f0b6386 | 827 | |
02040f0b | 828 | #else /* !CONFIG_SUSPEND */ |
8110dd28 | 829 | #define s2idle_wakeup (false) |
02040f0b RW |
830 | static inline void acpi_sleep_suspend_setup(void) {} |
831 | #endif /* !CONFIG_SUSPEND */ | |
296699de | 832 | |
33e4f80e RW |
833 | bool acpi_s2idle_wakeup(void) |
834 | { | |
835 | return s2idle_wakeup; | |
836 | } | |
837 | ||
504997cf SH |
838 | #ifdef CONFIG_PM_SLEEP |
839 | static u32 saved_bm_rld; | |
840 | ||
841 | static int acpi_save_bm_rld(void) | |
842 | { | |
843 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld); | |
844 | return 0; | |
845 | } | |
846 | ||
847 | static void acpi_restore_bm_rld(void) | |
848 | { | |
849 | u32 resumed_bm_rld = 0; | |
850 | ||
851 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld); | |
852 | if (resumed_bm_rld == saved_bm_rld) | |
853 | return; | |
854 | ||
855 | acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld); | |
856 | } | |
857 | ||
858 | static struct syscore_ops acpi_sleep_syscore_ops = { | |
859 | .suspend = acpi_save_bm_rld, | |
860 | .resume = acpi_restore_bm_rld, | |
861 | }; | |
862 | ||
a042e0c6 | 863 | static void acpi_sleep_syscore_init(void) |
504997cf SH |
864 | { |
865 | register_syscore_ops(&acpi_sleep_syscore_ops); | |
866 | } | |
867 | #else | |
868 | static inline void acpi_sleep_syscore_init(void) {} | |
869 | #endif /* CONFIG_PM_SLEEP */ | |
870 | ||
b0cb1a19 | 871 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
872 | static unsigned long s4_hardware_signature; |
873 | static struct acpi_table_facs *facs; | |
f6c46b1d | 874 | int acpi_check_s4_hw_signature = -1; /* Default behaviour is just to warn */ |
bdfe6b7c | 875 | |
bb186901 | 876 | static int acpi_hibernation_begin(pm_message_t stage) |
74f270af | 877 | { |
bb186901 RW |
878 | if (!nvs_nosave) { |
879 | int error = suspend_nvs_alloc(); | |
880 | if (error) | |
881 | return error; | |
882 | } | |
3f4b0ef7 | 883 | |
bb186901 RW |
884 | if (stage.event == PM_EVENT_HIBERNATE) |
885 | pm_set_suspend_via_firmware(); | |
3f4b0ef7 | 886 | |
bb186901 RW |
887 | acpi_pm_start(ACPI_STATE_S4); |
888 | return 0; | |
3f4b0ef7 RW |
889 | } |
890 | ||
a3d25c27 RW |
891 | static int acpi_hibernation_enter(void) |
892 | { | |
893 | acpi_status status = AE_OK; | |
a3d25c27 | 894 | |
a3d25c27 | 895 | /* This shouldn't return. If it returns, we have a problem */ |
3f6f49c7 LB |
896 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
897 | /* Reprogram control registers */ | |
898 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
899 | |
900 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
901 | } | |
902 | ||
c7e0831d RW |
903 | static void acpi_hibernation_leave(void) |
904 | { | |
fbda4b38 | 905 | pm_set_resume_via_firmware(); |
c7e0831d RW |
906 | /* |
907 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
908 | * enable it here. | |
909 | */ | |
910 | acpi_enable(); | |
3f6f49c7 LB |
911 | /* Reprogram control registers */ |
912 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c | 913 | /* Check the hardware signature */ |
5c551e62 | 914 | if (facs && s4_hardware_signature != facs->hardware_signature) |
f5ee87df | 915 | pr_crit("Hardware changed while hibernated, success doubtful!\n"); |
3f4b0ef7 | 916 | /* Restore the NVS memory area */ |
dd4c4f17 | 917 | suspend_nvs_restore(); |
d5a64513 | 918 | /* Allow EC transactions to happen. */ |
c2b46d67 | 919 | acpi_ec_unblock_transactions(); |
c7e0831d RW |
920 | } |
921 | ||
d5a64513 | 922 | static void acpi_pm_thaw(void) |
f6bb13aa | 923 | { |
fe955682 | 924 | acpi_ec_unblock_transactions(); |
3d97e426 | 925 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
926 | } |
927 | ||
073ef1f6 | 928 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
929 | .begin = acpi_hibernation_begin, |
930 | .end = acpi_pm_end, | |
c5f7a1bb | 931 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 932 | .finish = acpi_pm_finish, |
d8f3de0d RW |
933 | .prepare = acpi_pm_prepare, |
934 | .enter = acpi_hibernation_enter, | |
935 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
936 | .pre_restore = acpi_pm_freeze, |
937 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 938 | }; |
caea99ef | 939 | |
d8f3de0d RW |
940 | /** |
941 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
942 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
943 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
944 | * requested. | |
945 | */ | |
bb186901 | 946 | static int acpi_hibernation_begin_old(pm_message_t stage) |
a634cc10 | 947 | { |
e49f711c ZY |
948 | int error; |
949 | /* | |
950 | * The _TTS object should always be evaluated before the _PTS object. | |
951 | * When the old_suspended_ordering is true, the _PTS object is | |
952 | * evaluated in the acpi_sleep_prepare. | |
953 | */ | |
954 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
955 | ||
956 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
bb186901 RW |
957 | if (error) |
958 | return error; | |
a634cc10 | 959 | |
bb186901 RW |
960 | if (!nvs_nosave) { |
961 | error = suspend_nvs_alloc(); | |
962 | if (error) | |
963 | return error; | |
3f4b0ef7 | 964 | } |
bb186901 RW |
965 | |
966 | if (stage.event == PM_EVENT_HIBERNATE) | |
967 | pm_set_suspend_via_firmware(); | |
968 | ||
969 | acpi_target_sleep_state = ACPI_STATE_S4; | |
970 | acpi_scan_lock_acquire(); | |
971 | return 0; | |
3f4b0ef7 RW |
972 | } |
973 | ||
d8f3de0d RW |
974 | /* |
975 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
976 | * been requested. | |
977 | */ | |
073ef1f6 | 978 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
979 | .begin = acpi_hibernation_begin_old, |
980 | .end = acpi_pm_end, | |
c5f7a1bb | 981 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 982 | .prepare = acpi_pm_freeze, |
2a6b6976 | 983 | .finish = acpi_pm_finish, |
a3d25c27 | 984 | .enter = acpi_hibernation_enter, |
c7e0831d | 985 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
986 | .pre_restore = acpi_pm_freeze, |
987 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 988 | .recover = acpi_pm_finish, |
a3d25c27 | 989 | }; |
02040f0b RW |
990 | |
991 | static void acpi_sleep_hibernate_setup(void) | |
992 | { | |
a4e90bed | 993 | if (!acpi_sleep_state_supported(ACPI_STATE_S4)) |
02040f0b RW |
994 | return; |
995 | ||
996 | hibernation_set_ops(old_suspend_ordering ? | |
997 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
998 | sleep_states[ACPI_STATE_S4] = 1; | |
f6c46b1d | 999 | if (!acpi_check_s4_hw_signature) |
02040f0b RW |
1000 | return; |
1001 | ||
1002 | acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); | |
74d95555 DW |
1003 | if (facs) { |
1004 | /* | |
1005 | * s4_hardware_signature is the local variable which is just | |
1006 | * used to warn about mismatch after we're attempting to | |
1007 | * resume (in violation of the ACPI specification.) | |
1008 | */ | |
02040f0b | 1009 | s4_hardware_signature = facs->hardware_signature; |
74d95555 | 1010 | |
f6c46b1d | 1011 | if (acpi_check_s4_hw_signature > 0) { |
74d95555 DW |
1012 | /* |
1013 | * If we're actually obeying the ACPI specification | |
1014 | * then the signature is written out as part of the | |
1015 | * swsusp header, in order to allow the boot kernel | |
1016 | * to gracefully decline to resume. | |
1017 | */ | |
1018 | swsusp_hardware_signature = facs->hardware_signature; | |
1019 | } | |
1020 | } | |
02040f0b RW |
1021 | } |
1022 | #else /* !CONFIG_HIBERNATION */ | |
1023 | static inline void acpi_sleep_hibernate_setup(void) {} | |
1024 | #endif /* !CONFIG_HIBERNATION */ | |
a3d25c27 | 1025 | |
f216cc37 AS |
1026 | static void acpi_power_off_prepare(void) |
1027 | { | |
1028 | /* Prepare to power off the system */ | |
1029 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 1030 | acpi_disable_all_gpes(); |
c52fa70c | 1031 | acpi_os_wait_events_complete(); |
f216cc37 AS |
1032 | } |
1033 | ||
1034 | static void acpi_power_off(void) | |
1035 | { | |
1036 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
f5ee87df | 1037 | pr_debug("%s called\n", __func__); |
f216cc37 | 1038 | local_irq_disable(); |
3f6f49c7 | 1039 | acpi_enter_sleep_state(ACPI_STATE_S5); |
96f15efc LB |
1040 | } |
1041 | ||
aafbcd16 | 1042 | int __init acpi_sleep_init(void) |
1da177e4 | 1043 | { |
ed4cf5b2 JP |
1044 | char supported[ACPI_S_STATE_COUNT * 3 + 1]; |
1045 | char *pos = supported; | |
1046 | int i; | |
1da177e4 | 1047 | |
0ac1b1d7 ZR |
1048 | acpi_sleep_dmi_check(); |
1049 | ||
5a50fe70 | 1050 | sleep_states[ACPI_STATE_S0] = 1; |
5a50fe70 | 1051 | |
504997cf | 1052 | acpi_sleep_syscore_init(); |
02040f0b RW |
1053 | acpi_sleep_suspend_setup(); |
1054 | acpi_sleep_hibernate_setup(); | |
1da177e4 | 1055 | |
a4e90bed | 1056 | if (acpi_sleep_state_supported(ACPI_STATE_S5)) { |
f216cc37 | 1057 | sleep_states[ACPI_STATE_S5] = 1; |
f216cc37 AS |
1058 | pm_power_off_prepare = acpi_power_off_prepare; |
1059 | pm_power_off = acpi_power_off; | |
13737181 CY |
1060 | } else { |
1061 | acpi_no_s5 = true; | |
f216cc37 | 1062 | } |
ed4cf5b2 JP |
1063 | |
1064 | supported[0] = 0; | |
1065 | for (i = 0; i < ACPI_S_STATE_COUNT; i++) { | |
1066 | if (sleep_states[i]) | |
1067 | pos += sprintf(pos, " S%d", i); | |
1068 | } | |
f5ee87df | 1069 | pr_info("(supports%s)\n", supported); |
ed4cf5b2 | 1070 | |
e49f711c | 1071 | /* |
9713adc2 RW |
1072 | * Register the tts_notifier to reboot notifier list so that the _TTS |
1073 | * object can also be evaluated when the system enters S5. | |
e49f711c | 1074 | */ |
9713adc2 | 1075 | register_reboot_notifier(&tts_notifier); |
1da177e4 LT |
1076 | return 0; |
1077 | } |