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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * sleep.c - ACPI sleep support. | |
3 | * | |
e2a5b420 | 4 | * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> |
1da177e4 LT |
5 | * 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> | |
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 | */ | |
46 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); | |
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 | |
66 | /* do we have a wakeup address for S2 and S3? */ | |
67 | if (acpi_state == ACPI_STATE_S3) { | |
319b6ffc | 68 | if (!acpi_wakeup_address) |
2f3f2226 | 69 | return -EFAULT; |
e3e9b577 | 70 | acpi_set_waking_vector(acpi_wakeup_address); |
2f3f2226 AS |
71 | |
72 | } | |
73 | ACPI_FLUSH_CPU_CACHE(); | |
2f3f2226 | 74 | #endif |
c9b6c8f6 RW |
75 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
76 | acpi_state); | |
78f5f023 | 77 | acpi_enable_wakeup_devices(acpi_state); |
2f3f2226 AS |
78 | acpi_enter_sleep_state_prep(acpi_state); |
79 | return 0; | |
80 | } | |
81 | ||
a4e90bed RW |
82 | static 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 | ||
5d1e072b | 93 | #ifdef CONFIG_ACPI_SLEEP |
091aad6a | 94 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
a6ae7594 RW |
95 | |
96 | u32 acpi_target_system_state(void) | |
97 | { | |
98 | return acpi_target_sleep_state; | |
99 | } | |
fad16dd9 | 100 | EXPORT_SYMBOL_GPL(acpi_target_system_state); |
a6ae7594 | 101 | |
a5ca7345 | 102 | static bool pwr_btn_event_pending; |
091aad6a | 103 | |
72ad5d77 RW |
104 | /* |
105 | * 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 | */ | |
111 | static bool nvs_nosave; | |
112 | ||
113 | void __init acpi_nvs_nosave(void) | |
114 | { | |
115 | nvs_nosave = true; | |
116 | } | |
117 | ||
1bad2f19 KCA |
118 | /* |
119 | * 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 | */ | |
126 | static bool nvs_nosave_s3; | |
127 | ||
128 | void __init acpi_nvs_nosave_s3(void) | |
129 | { | |
130 | nvs_nosave_s3 = true; | |
131 | } | |
132 | ||
cbc00c13 ZR |
133 | static int __init init_nvs_save_s3(const struct dmi_system_id *d) |
134 | { | |
135 | nvs_nosave_s3 = false; | |
136 | return 0; | |
137 | } | |
138 | ||
d8f3de0d RW |
139 | /* |
140 | * 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 | */ | |
144 | static bool old_suspend_ordering; | |
145 | ||
146 | void __init acpi_old_suspend_ordering(void) | |
147 | { | |
148 | old_suspend_ordering = true; | |
149 | } | |
150 | ||
0ac1b1d7 ZR |
151 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
152 | { | |
153 | acpi_old_suspend_ordering(); | |
154 | return 0; | |
155 | } | |
156 | ||
157 | static int __init init_nvs_nosave(const struct dmi_system_id *d) | |
158 | { | |
159 | acpi_nvs_nosave(); | |
160 | return 0; | |
161 | } | |
162 | ||
56aa325d RW |
163 | static bool acpi_sleep_no_lps0; |
164 | ||
165 | static int __init init_no_lps0(const struct dmi_system_id *d) | |
166 | { | |
167 | acpi_sleep_no_lps0 = true; | |
168 | return 0; | |
169 | } | |
170 | ||
3e4376ff | 171 | static struct dmi_system_id acpisleep_dmi_table[] __initdata = { |
0ac1b1d7 ZR |
172 | { |
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 | }, | |
180 | { | |
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 | }, | |
188 | { | |
189 | .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 | }, | |
196 | { | |
197 | .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 | }, | |
205 | { | |
206 | .callback = init_nvs_nosave, | |
66f2fda9 JS |
207 | .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, | |
0ac1b1d7 ZR |
215 | .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, | |
469dd1c4 FV |
223 | .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, | |
0ac1b1d7 ZR |
231 | .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, | |
239 | .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 | }, | |
253 | { | |
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 | }, | |
261 | { | |
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 | }, | |
269 | { | |
270 | .callback = init_nvs_nosave, | |
271 | .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, | |
279 | .ident = "Averatec AV1020-ED2", | |
280 | .matches = { | |
281 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
282 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
283 | }, | |
284 | }, | |
285 | { | |
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 | }, | |
301 | { | |
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 | }, | |
309 | { | |
310 | .callback = init_nvs_nosave, | |
311 | .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, | |
319 | .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 | }, | |
325 | { | |
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 | }, | |
cbc00c13 ZR |
341 | /* |
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 | }, | |
56aa325d RW |
354 | /* |
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 | }, | |
0ac1b1d7 ZR |
367 | {}, |
368 | }; | |
369 | ||
8b691c9c | 370 | static void __init acpi_sleep_dmi_check(void) |
0ac1b1d7 | 371 | { |
821d6f03 LT |
372 | int year; |
373 | ||
374 | if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year >= 2012) | |
375 | acpi_nvs_nosave_s3(); | |
376 | ||
0ac1b1d7 ZR |
377 | dmi_check_system(acpisleep_dmi_table); |
378 | } | |
379 | ||
d8f3de0d | 380 | /** |
d5a64513 | 381 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 382 | */ |
d5a64513 | 383 | static int acpi_pm_freeze(void) |
d8f3de0d | 384 | { |
3d97e426 | 385 | acpi_disable_all_gpes(); |
bd6f10a5 | 386 | acpi_os_wait_events_complete(); |
fe955682 | 387 | acpi_ec_block_transactions(); |
d8f3de0d RW |
388 | return 0; |
389 | } | |
390 | ||
c5f7a1bb RW |
391 | /** |
392 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
393 | */ | |
394 | static int acpi_pm_pre_suspend(void) | |
395 | { | |
396 | acpi_pm_freeze(); | |
26fcaf60 | 397 | return suspend_nvs_save(); |
c5f7a1bb RW |
398 | } |
399 | ||
d8f3de0d RW |
400 | /** |
401 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
402 | * | |
403 | * If necessary, set the firmware waking vector and do arch-specific | |
404 | * nastiness to get the wakeup code to the waking vector. | |
405 | */ | |
406 | static int __acpi_pm_prepare(void) | |
407 | { | |
408 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
409 | if (error) |
410 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 411 | |
d8f3de0d RW |
412 | return error; |
413 | } | |
414 | ||
415 | /** | |
416 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
417 | * state and disable the GPEs. | |
418 | */ | |
419 | static int acpi_pm_prepare(void) | |
420 | { | |
421 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 422 | if (!error) |
26fcaf60 | 423 | error = acpi_pm_pre_suspend(); |
d5a64513 | 424 | |
d8f3de0d RW |
425 | return error; |
426 | } | |
427 | ||
c10d7a13 DD |
428 | static int find_powerf_dev(struct device *dev, void *data) |
429 | { | |
430 | struct acpi_device *device = to_acpi_device(dev); | |
431 | const char *hid = acpi_device_hid(device); | |
432 | ||
433 | return !strcmp(hid, ACPI_BUTTON_HID_POWERF); | |
434 | } | |
435 | ||
d8f3de0d RW |
436 | /** |
437 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
438 | * | |
439 | * This is called after we wake back up (or if entering the sleep state | |
440 | * failed). | |
441 | */ | |
442 | static void acpi_pm_finish(void) | |
443 | { | |
c10d7a13 | 444 | struct device *pwr_btn_dev; |
d8f3de0d RW |
445 | u32 acpi_state = acpi_target_sleep_state; |
446 | ||
42de5532 | 447 | acpi_ec_unblock_transactions(); |
d551d81d | 448 | suspend_nvs_free(); |
2a6b6976 | 449 | |
d8f3de0d RW |
450 | if (acpi_state == ACPI_STATE_S0) |
451 | return; | |
1da177e4 | 452 | |
d8f3de0d RW |
453 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
454 | acpi_state); | |
78f5f023 | 455 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
456 | acpi_leave_sleep_state(acpi_state); |
457 | ||
458 | /* reset firmware waking vector */ | |
e3e9b577 | 459 | acpi_set_waking_vector(0); |
d8f3de0d RW |
460 | |
461 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c10d7a13 | 462 | |
781d737c RW |
463 | acpi_resume_power_resources(); |
464 | ||
c10d7a13 DD |
465 | /* If we were woken with the fixed power button, provide a small |
466 | * hint to userspace in the form of a wakeup event on the fixed power | |
467 | * button device (if it can be found). | |
468 | * | |
469 | * We delay the event generation til now, as the PM layer requires | |
470 | * timekeeping to be running before we generate events. */ | |
471 | if (!pwr_btn_event_pending) | |
472 | return; | |
473 | ||
474 | pwr_btn_event_pending = false; | |
475 | pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, | |
476 | find_powerf_dev); | |
477 | if (pwr_btn_dev) { | |
478 | pm_wakeup_event(pwr_btn_dev, 0); | |
479 | put_device(pwr_btn_dev); | |
480 | } | |
d8f3de0d RW |
481 | } |
482 | ||
483 | /** | |
ad07277e RW |
484 | * acpi_pm_start - Start system PM transition. |
485 | */ | |
486 | static void acpi_pm_start(u32 acpi_state) | |
487 | { | |
488 | acpi_target_sleep_state = acpi_state; | |
489 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
490 | acpi_scan_lock_acquire(); | |
491 | } | |
492 | ||
493 | /** | |
494 | * acpi_pm_end - Finish up system PM transition. | |
d8f3de0d RW |
495 | */ |
496 | static void acpi_pm_end(void) | |
497 | { | |
8ece1d83 | 498 | acpi_turn_off_unused_power_resources(); |
ad07277e | 499 | acpi_scan_lock_release(); |
d8f3de0d RW |
500 | /* |
501 | * This is necessary in case acpi_pm_finish() is not called during a | |
502 | * failing transition to a sleep state. | |
503 | */ | |
504 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 505 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 506 | } |
92daa7b5 RW |
507 | #else /* !CONFIG_ACPI_SLEEP */ |
508 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
56aa325d | 509 | #define acpi_sleep_no_lps0 (false) |
0ac1b1d7 | 510 | static inline void acpi_sleep_dmi_check(void) {} |
5d1e072b | 511 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 512 | |
d8f3de0d | 513 | #ifdef CONFIG_SUSPEND |
1da177e4 | 514 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
515 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
516 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
517 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 518 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
519 | }; |
520 | ||
e9b3aba8 | 521 | /** |
2c6e33c3 | 522 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
523 | * associated with given @pm_state, if supported. |
524 | */ | |
2c6e33c3 | 525 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
526 | { |
527 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
ad07277e | 528 | int error; |
e9b3aba8 | 529 | |
1bad2f19 | 530 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
531 | if (error) |
532 | return error; | |
533 | ||
ad07277e RW |
534 | if (!sleep_states[acpi_state]) { |
535 | pr_err("ACPI does not support sleep state S%u\n", acpi_state); | |
536 | return -ENOSYS; | |
e9b3aba8 | 537 | } |
ef25ba04 RW |
538 | if (acpi_state > ACPI_STATE_S1) |
539 | pm_set_suspend_via_firmware(); | |
ad07277e RW |
540 | |
541 | acpi_pm_start(acpi_state); | |
542 | return 0; | |
e9b3aba8 RW |
543 | } |
544 | ||
1da177e4 | 545 | /** |
2c6e33c3 | 546 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 547 | * @pm_state: ignored |
1da177e4 | 548 | * |
50ad147a RW |
549 | * Flush caches and go to sleep. For STR we have to call arch-specific |
550 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
551 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
552 | */ | |
2c6e33c3 | 553 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
554 | { |
555 | acpi_status status = AE_OK; | |
e9b3aba8 | 556 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 557 | int error; |
1da177e4 LT |
558 | |
559 | ACPI_FLUSH_CPU_CACHE(); | |
560 | ||
bb3632c6 | 561 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true); |
e9b3aba8 RW |
562 | switch (acpi_state) { |
563 | case ACPI_STATE_S1: | |
1da177e4 | 564 | barrier(); |
3f6f49c7 | 565 | status = acpi_enter_sleep_state(acpi_state); |
1da177e4 LT |
566 | break; |
567 | ||
e9b3aba8 | 568 | case ACPI_STATE_S3: |
d6a77ead KRW |
569 | if (!acpi_suspend_lowlevel) |
570 | return -ENOSYS; | |
f1a2003e | 571 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
572 | if (error) |
573 | return error; | |
7a63f08b | 574 | pr_info(PREFIX "Low-level resume complete\n"); |
ef25ba04 | 575 | pm_set_resume_via_firmware(); |
1da177e4 | 576 | break; |
1da177e4 | 577 | } |
bb3632c6 | 578 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false); |
872d83d0 | 579 | |
b6dacf63 MG |
580 | /* This violates the spec but is required for bug compatibility. */ |
581 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 582 | |
3f6f49c7 LB |
583 | /* Reprogram control registers */ |
584 | acpi_leave_sleep_state_prep(acpi_state); | |
c95d47a8 | 585 | |
23b168d4 | 586 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
587 | * of the OSPM to clear the status bit [ implying that the |
588 | * POWER_BUTTON event should not reach userspace ] | |
c10d7a13 DD |
589 | * |
590 | * However, we do generate a small hint for userspace in the form of | |
591 | * a wakeup event. We flag this condition for now and generate the | |
592 | * event later, as we're currently too early in resume to be able to | |
593 | * generate wakeup events. | |
872d83d0 | 594 | */ |
c10d7a13 | 595 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
51468a9d | 596 | acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED; |
c10d7a13 DD |
597 | |
598 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); | |
599 | ||
18864cc4 | 600 | if (pwr_btn_status & ACPI_EVENT_FLAG_STATUS_SET) { |
c10d7a13 DD |
601 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); |
602 | /* Flag for later */ | |
603 | pwr_btn_event_pending = true; | |
604 | } | |
605 | } | |
872d83d0 | 606 | |
a3627f67 SL |
607 | /* |
608 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
609 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
610 | * acpi_leave_sleep_state will reenable specific GPEs later | |
611 | */ | |
3d97e426 | 612 | acpi_disable_all_gpes(); |
d5a64513 | 613 | /* Allow EC transactions to happen. */ |
c2b46d67 | 614 | acpi_ec_unblock_transactions(); |
a3627f67 | 615 | |
2a6b6976 MG |
616 | suspend_nvs_restore(); |
617 | ||
1da177e4 LT |
618 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
619 | } | |
620 | ||
2c6e33c3 | 621 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 622 | { |
e8c9c502 | 623 | u32 acpi_state; |
eb9289eb | 624 | |
e8c9c502 JB |
625 | switch (pm_state) { |
626 | case PM_SUSPEND_ON: | |
627 | case PM_SUSPEND_STANDBY: | |
628 | case PM_SUSPEND_MEM: | |
629 | acpi_state = acpi_suspend_states[pm_state]; | |
630 | ||
631 | return sleep_states[acpi_state]; | |
632 | default: | |
633 | return 0; | |
634 | } | |
eb9289eb SL |
635 | } |
636 | ||
2f55ac07 | 637 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
638 | .valid = acpi_suspend_state_valid, |
639 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 640 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 641 | .enter = acpi_suspend_enter, |
618d7fd0 | 642 | .wake = acpi_pm_finish, |
d8f3de0d RW |
643 | .end = acpi_pm_end, |
644 | }; | |
645 | ||
646 | /** | |
647 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
648 | * state associated with given @pm_state, if supported, and | |
649 | * execute the _PTS control method. This function is used if the | |
650 | * pre-ACPI 2.0 suspend ordering has been requested. | |
651 | */ | |
652 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
653 | { | |
654 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
655 | if (!error) |
656 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 657 | |
d8f3de0d RW |
658 | return error; |
659 | } | |
660 | ||
661 | /* | |
662 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
663 | * been requested. | |
664 | */ | |
2f55ac07 | 665 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
666 | .valid = acpi_suspend_state_valid, |
667 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 668 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 669 | .enter = acpi_suspend_enter, |
618d7fd0 | 670 | .wake = acpi_pm_finish, |
d8f3de0d RW |
671 | .end = acpi_pm_end, |
672 | .recover = acpi_pm_finish, | |
1da177e4 | 673 | }; |
02040f0b | 674 | |
8110dd28 | 675 | static bool s2idle_in_progress; |
33e4f80e RW |
676 | static bool s2idle_wakeup; |
677 | ||
8110dd28 RW |
678 | /* |
679 | * On platforms supporting the Low Power S0 Idle interface there is an ACPI | |
680 | * device object with the PNP0D80 compatible device ID (System Power Management | |
681 | * Controller) and a specific _DSM method under it. That method, if present, | |
682 | * can be used to indicate to the platform that the OS is transitioning into a | |
683 | * low-power state in which certain types of activity are not desirable or that | |
684 | * it is leaving such a state, which allows the platform to adjust its operation | |
685 | * mode accordingly. | |
686 | */ | |
687 | static const struct acpi_device_id lps0_device_ids[] = { | |
688 | {"PNP0D80", }, | |
689 | {"", }, | |
690 | }; | |
691 | ||
692 | #define ACPI_LPS0_DSM_UUID "c4eb40a0-6cd2-11e2-bcfd-0800200c9a66" | |
693 | ||
694 | #define ACPI_LPS0_SCREEN_OFF 3 | |
695 | #define ACPI_LPS0_SCREEN_ON 4 | |
696 | #define ACPI_LPS0_ENTRY 5 | |
697 | #define ACPI_LPS0_EXIT 6 | |
698 | ||
699 | #define ACPI_S2IDLE_FUNC_MASK ((1 << ACPI_LPS0_ENTRY) | (1 << ACPI_LPS0_EXIT)) | |
700 | ||
701 | static acpi_handle lps0_device_handle; | |
702 | static guid_t lps0_dsm_guid; | |
703 | static char lps0_dsm_func_mask; | |
704 | ||
705 | static void acpi_sleep_run_lps0_dsm(unsigned int func) | |
706 | { | |
707 | union acpi_object *out_obj; | |
708 | ||
709 | if (!(lps0_dsm_func_mask & (1 << func))) | |
710 | return; | |
711 | ||
712 | out_obj = acpi_evaluate_dsm(lps0_device_handle, &lps0_dsm_guid, 1, func, NULL); | |
713 | ACPI_FREE(out_obj); | |
714 | ||
715 | acpi_handle_debug(lps0_device_handle, "_DSM function %u evaluation %s\n", | |
716 | func, out_obj ? "successful" : "failed"); | |
717 | } | |
718 | ||
719 | static int lps0_device_attach(struct acpi_device *adev, | |
720 | const struct acpi_device_id *not_used) | |
721 | { | |
722 | union acpi_object *out_obj; | |
723 | ||
724 | if (lps0_device_handle) | |
725 | return 0; | |
726 | ||
56aa325d RW |
727 | if (acpi_sleep_no_lps0) { |
728 | acpi_handle_info(adev->handle, | |
729 | "Low Power S0 Idle interface disabled\n"); | |
730 | return 0; | |
731 | } | |
732 | ||
8110dd28 RW |
733 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) |
734 | return 0; | |
735 | ||
736 | guid_parse(ACPI_LPS0_DSM_UUID, &lps0_dsm_guid); | |
737 | /* Check if the _DSM is present and as expected. */ | |
738 | out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 1, 0, NULL); | |
739 | if (out_obj && out_obj->type == ACPI_TYPE_BUFFER) { | |
740 | char bitmask = *(char *)out_obj->buffer.pointer; | |
741 | ||
742 | if ((bitmask & ACPI_S2IDLE_FUNC_MASK) == ACPI_S2IDLE_FUNC_MASK) { | |
743 | lps0_dsm_func_mask = bitmask; | |
744 | lps0_device_handle = adev->handle; | |
745 | } | |
746 | ||
747 | acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n", | |
748 | bitmask); | |
749 | } else { | |
750 | acpi_handle_debug(adev->handle, | |
751 | "_DSM function 0 evaluation failed\n"); | |
752 | } | |
753 | ACPI_FREE(out_obj); | |
754 | return 0; | |
755 | } | |
756 | ||
757 | static struct acpi_scan_handler lps0_handler = { | |
758 | .ids = lps0_device_ids, | |
759 | .attach = lps0_device_attach, | |
760 | }; | |
761 | ||
1f0b6386 RW |
762 | static int acpi_freeze_begin(void) |
763 | { | |
764 | acpi_scan_lock_acquire(); | |
8110dd28 | 765 | s2idle_in_progress = true; |
1f0b6386 RW |
766 | return 0; |
767 | } | |
768 | ||
a8d46b9e RW |
769 | static int acpi_freeze_prepare(void) |
770 | { | |
8110dd28 RW |
771 | if (lps0_device_handle) { |
772 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF); | |
773 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY); | |
774 | } else { | |
775 | /* | |
776 | * The configuration of GPEs is changed here to avoid spurious | |
777 | * wakeups, but that should not be necessary if this is a | |
778 | * "low-power S0" platform and the low-power S0 _DSM is present. | |
779 | */ | |
780 | acpi_enable_all_wakeup_gpes(); | |
781 | acpi_os_wait_events_complete(); | |
782 | } | |
8c01275e CY |
783 | if (acpi_sci_irq_valid()) |
784 | enable_irq_wake(acpi_sci_irq); | |
235d81a6 | 785 | |
a8d46b9e RW |
786 | return 0; |
787 | } | |
788 | ||
33e4f80e RW |
789 | static void acpi_freeze_wake(void) |
790 | { | |
791 | /* | |
792 | * If IRQD_WAKEUP_ARMED is not set for the SCI at this point, it means | |
793 | * that the SCI has triggered while suspended, so cancel the wakeup in | |
794 | * case it has not been a wakeup event (the GPEs will be checked later). | |
795 | */ | |
796 | if (acpi_sci_irq_valid() && | |
797 | !irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq))) { | |
798 | pm_system_cancel_wakeup(); | |
799 | s2idle_wakeup = true; | |
800 | } | |
801 | } | |
802 | ||
803 | static void acpi_freeze_sync(void) | |
804 | { | |
805 | /* | |
806 | * Process all pending events in case there are any wakeup ones. | |
807 | * | |
880a6627 RW |
808 | * The EC driver uses the system workqueue and an additional special |
809 | * one, so those need to be flushed too. | |
33e4f80e | 810 | */ |
880a6627 | 811 | acpi_ec_flush_work(); |
33e4f80e | 812 | acpi_os_wait_events_complete(); |
33e4f80e RW |
813 | s2idle_wakeup = false; |
814 | } | |
815 | ||
a8d46b9e RW |
816 | static void acpi_freeze_restore(void) |
817 | { | |
8c01275e CY |
818 | if (acpi_sci_irq_valid()) |
819 | disable_irq_wake(acpi_sci_irq); | |
235d81a6 | 820 | |
8110dd28 RW |
821 | if (lps0_device_handle) { |
822 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT); | |
823 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON); | |
824 | } else { | |
825 | acpi_enable_all_runtime_gpes(); | |
826 | } | |
a8d46b9e RW |
827 | } |
828 | ||
1f0b6386 RW |
829 | static void acpi_freeze_end(void) |
830 | { | |
8110dd28 | 831 | s2idle_in_progress = false; |
1f0b6386 RW |
832 | acpi_scan_lock_release(); |
833 | } | |
834 | ||
835 | static const struct platform_freeze_ops acpi_freeze_ops = { | |
836 | .begin = acpi_freeze_begin, | |
a8d46b9e | 837 | .prepare = acpi_freeze_prepare, |
33e4f80e RW |
838 | .wake = acpi_freeze_wake, |
839 | .sync = acpi_freeze_sync, | |
a8d46b9e | 840 | .restore = acpi_freeze_restore, |
1f0b6386 RW |
841 | .end = acpi_freeze_end, |
842 | }; | |
843 | ||
02040f0b RW |
844 | static void acpi_sleep_suspend_setup(void) |
845 | { | |
846 | int i; | |
847 | ||
a4e90bed RW |
848 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) |
849 | if (acpi_sleep_state_supported(i)) | |
02040f0b | 850 | sleep_states[i] = 1; |
02040f0b RW |
851 | |
852 | suspend_set_ops(old_suspend_ordering ? | |
853 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
8110dd28 RW |
854 | |
855 | acpi_scan_add_handler(&lps0_handler); | |
1f0b6386 | 856 | freeze_set_ops(&acpi_freeze_ops); |
02040f0b | 857 | } |
1f0b6386 | 858 | |
02040f0b | 859 | #else /* !CONFIG_SUSPEND */ |
8110dd28 RW |
860 | #define s2idle_in_progress (false) |
861 | #define s2idle_wakeup (false) | |
862 | #define lps0_device_handle (NULL) | |
02040f0b RW |
863 | static inline void acpi_sleep_suspend_setup(void) {} |
864 | #endif /* !CONFIG_SUSPEND */ | |
296699de | 865 | |
33e4f80e RW |
866 | bool acpi_s2idle_wakeup(void) |
867 | { | |
868 | return s2idle_wakeup; | |
869 | } | |
870 | ||
8110dd28 RW |
871 | bool acpi_sleep_no_ec_events(void) |
872 | { | |
873 | return !s2idle_in_progress || !lps0_device_handle; | |
874 | } | |
875 | ||
504997cf SH |
876 | #ifdef CONFIG_PM_SLEEP |
877 | static u32 saved_bm_rld; | |
878 | ||
879 | static int acpi_save_bm_rld(void) | |
880 | { | |
881 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld); | |
882 | return 0; | |
883 | } | |
884 | ||
885 | static void acpi_restore_bm_rld(void) | |
886 | { | |
887 | u32 resumed_bm_rld = 0; | |
888 | ||
889 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld); | |
890 | if (resumed_bm_rld == saved_bm_rld) | |
891 | return; | |
892 | ||
893 | acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld); | |
894 | } | |
895 | ||
896 | static struct syscore_ops acpi_sleep_syscore_ops = { | |
897 | .suspend = acpi_save_bm_rld, | |
898 | .resume = acpi_restore_bm_rld, | |
899 | }; | |
900 | ||
901 | void acpi_sleep_syscore_init(void) | |
902 | { | |
903 | register_syscore_ops(&acpi_sleep_syscore_ops); | |
904 | } | |
905 | #else | |
906 | static inline void acpi_sleep_syscore_init(void) {} | |
907 | #endif /* CONFIG_PM_SLEEP */ | |
908 | ||
b0cb1a19 | 909 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
910 | static unsigned long s4_hardware_signature; |
911 | static struct acpi_table_facs *facs; | |
912 | static bool nosigcheck; | |
913 | ||
914 | void __init acpi_no_s4_hw_signature(void) | |
915 | { | |
916 | nosigcheck = true; | |
917 | } | |
918 | ||
caea99ef | 919 | static int acpi_hibernation_begin(void) |
74f270af | 920 | { |
3f4b0ef7 RW |
921 | int error; |
922 | ||
72ad5d77 | 923 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
ad07277e RW |
924 | if (!error) |
925 | acpi_pm_start(ACPI_STATE_S4); | |
3f4b0ef7 RW |
926 | |
927 | return error; | |
928 | } | |
929 | ||
a3d25c27 RW |
930 | static int acpi_hibernation_enter(void) |
931 | { | |
932 | acpi_status status = AE_OK; | |
a3d25c27 RW |
933 | |
934 | ACPI_FLUSH_CPU_CACHE(); | |
935 | ||
a3d25c27 | 936 | /* This shouldn't return. If it returns, we have a problem */ |
3f6f49c7 LB |
937 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
938 | /* Reprogram control registers */ | |
939 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
940 | |
941 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
942 | } | |
943 | ||
c7e0831d RW |
944 | static void acpi_hibernation_leave(void) |
945 | { | |
fbda4b38 | 946 | pm_set_resume_via_firmware(); |
c7e0831d RW |
947 | /* |
948 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
949 | * enable it here. | |
950 | */ | |
951 | acpi_enable(); | |
3f6f49c7 LB |
952 | /* Reprogram control registers */ |
953 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c | 954 | /* Check the hardware signature */ |
5c551e62 ON |
955 | if (facs && s4_hardware_signature != facs->hardware_signature) |
956 | pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n"); | |
3f4b0ef7 | 957 | /* Restore the NVS memory area */ |
dd4c4f17 | 958 | suspend_nvs_restore(); |
d5a64513 | 959 | /* Allow EC transactions to happen. */ |
c2b46d67 | 960 | acpi_ec_unblock_transactions(); |
c7e0831d RW |
961 | } |
962 | ||
d5a64513 | 963 | static void acpi_pm_thaw(void) |
f6bb13aa | 964 | { |
fe955682 | 965 | acpi_ec_unblock_transactions(); |
3d97e426 | 966 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
967 | } |
968 | ||
073ef1f6 | 969 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
970 | .begin = acpi_hibernation_begin, |
971 | .end = acpi_pm_end, | |
c5f7a1bb | 972 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 973 | .finish = acpi_pm_finish, |
d8f3de0d RW |
974 | .prepare = acpi_pm_prepare, |
975 | .enter = acpi_hibernation_enter, | |
976 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
977 | .pre_restore = acpi_pm_freeze, |
978 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 979 | }; |
caea99ef | 980 | |
d8f3de0d RW |
981 | /** |
982 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
983 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
984 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
985 | * requested. | |
986 | */ | |
987 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 988 | { |
e49f711c ZY |
989 | int error; |
990 | /* | |
991 | * The _TTS object should always be evaluated before the _PTS object. | |
992 | * When the old_suspended_ordering is true, the _PTS object is | |
993 | * evaluated in the acpi_sleep_prepare. | |
994 | */ | |
995 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
996 | ||
997 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 998 | |
3f4b0ef7 | 999 | if (!error) { |
72ad5d77 | 1000 | if (!nvs_nosave) |
dd4c4f17 | 1001 | error = suspend_nvs_alloc(); |
ad07277e | 1002 | if (!error) { |
3f4b0ef7 | 1003 | acpi_target_sleep_state = ACPI_STATE_S4; |
ad07277e RW |
1004 | acpi_scan_lock_acquire(); |
1005 | } | |
3f4b0ef7 RW |
1006 | } |
1007 | return error; | |
1008 | } | |
1009 | ||
d8f3de0d RW |
1010 | /* |
1011 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
1012 | * been requested. | |
1013 | */ | |
073ef1f6 | 1014 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
1015 | .begin = acpi_hibernation_begin_old, |
1016 | .end = acpi_pm_end, | |
c5f7a1bb | 1017 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 1018 | .prepare = acpi_pm_freeze, |
2a6b6976 | 1019 | .finish = acpi_pm_finish, |
a3d25c27 | 1020 | .enter = acpi_hibernation_enter, |
c7e0831d | 1021 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
1022 | .pre_restore = acpi_pm_freeze, |
1023 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 1024 | .recover = acpi_pm_finish, |
a3d25c27 | 1025 | }; |
02040f0b RW |
1026 | |
1027 | static void acpi_sleep_hibernate_setup(void) | |
1028 | { | |
a4e90bed | 1029 | if (!acpi_sleep_state_supported(ACPI_STATE_S4)) |
02040f0b RW |
1030 | return; |
1031 | ||
1032 | hibernation_set_ops(old_suspend_ordering ? | |
1033 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
1034 | sleep_states[ACPI_STATE_S4] = 1; | |
02040f0b RW |
1035 | if (nosigcheck) |
1036 | return; | |
1037 | ||
1038 | acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); | |
1039 | if (facs) | |
1040 | s4_hardware_signature = facs->hardware_signature; | |
1041 | } | |
1042 | #else /* !CONFIG_HIBERNATION */ | |
1043 | static inline void acpi_sleep_hibernate_setup(void) {} | |
1044 | #endif /* !CONFIG_HIBERNATION */ | |
a3d25c27 | 1045 | |
f216cc37 AS |
1046 | static void acpi_power_off_prepare(void) |
1047 | { | |
1048 | /* Prepare to power off the system */ | |
1049 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 1050 | acpi_disable_all_gpes(); |
c52fa70c | 1051 | acpi_os_wait_events_complete(); |
f216cc37 AS |
1052 | } |
1053 | ||
1054 | static void acpi_power_off(void) | |
1055 | { | |
1056 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 1057 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 1058 | local_irq_disable(); |
3f6f49c7 | 1059 | acpi_enter_sleep_state(ACPI_STATE_S5); |
96f15efc LB |
1060 | } |
1061 | ||
aafbcd16 | 1062 | int __init acpi_sleep_init(void) |
1da177e4 | 1063 | { |
ed4cf5b2 JP |
1064 | char supported[ACPI_S_STATE_COUNT * 3 + 1]; |
1065 | char *pos = supported; | |
1066 | int i; | |
1da177e4 | 1067 | |
0ac1b1d7 ZR |
1068 | acpi_sleep_dmi_check(); |
1069 | ||
5a50fe70 | 1070 | sleep_states[ACPI_STATE_S0] = 1; |
5a50fe70 | 1071 | |
504997cf | 1072 | acpi_sleep_syscore_init(); |
02040f0b RW |
1073 | acpi_sleep_suspend_setup(); |
1074 | acpi_sleep_hibernate_setup(); | |
1da177e4 | 1075 | |
a4e90bed | 1076 | if (acpi_sleep_state_supported(ACPI_STATE_S5)) { |
f216cc37 | 1077 | sleep_states[ACPI_STATE_S5] = 1; |
f216cc37 AS |
1078 | pm_power_off_prepare = acpi_power_off_prepare; |
1079 | pm_power_off = acpi_power_off; | |
13737181 CY |
1080 | } else { |
1081 | acpi_no_s5 = true; | |
f216cc37 | 1082 | } |
ed4cf5b2 JP |
1083 | |
1084 | supported[0] = 0; | |
1085 | for (i = 0; i < ACPI_S_STATE_COUNT; i++) { | |
1086 | if (sleep_states[i]) | |
1087 | pos += sprintf(pos, " S%d", i); | |
1088 | } | |
1089 | pr_info(PREFIX "(supports%s)\n", supported); | |
1090 | ||
e49f711c | 1091 | /* |
9713adc2 RW |
1092 | * Register the tts_notifier to reboot notifier list so that the _TTS |
1093 | * object can also be evaluated when the system enters S5. | |
e49f711c | 1094 | */ |
9713adc2 | 1095 | register_reboot_notifier(&tts_notifier); |
1da177e4 LT |
1096 | return 0; |
1097 | } |