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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 | ||
3e4376ff | 163 | static struct dmi_system_id acpisleep_dmi_table[] __initdata = { |
0ac1b1d7 ZR |
164 | { |
165 | .callback = init_old_suspend_ordering, | |
166 | .ident = "Abit KN9 (nForce4 variant)", | |
167 | .matches = { | |
168 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
169 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
170 | }, | |
171 | }, | |
172 | { | |
173 | .callback = init_old_suspend_ordering, | |
174 | .ident = "HP xw4600 Workstation", | |
175 | .matches = { | |
176 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
177 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
178 | }, | |
179 | }, | |
180 | { | |
181 | .callback = init_old_suspend_ordering, | |
182 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
183 | .matches = { | |
184 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
185 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
186 | }, | |
187 | }, | |
188 | { | |
189 | .callback = init_old_suspend_ordering, | |
190 | .ident = "Panasonic CF51-2L", | |
191 | .matches = { | |
192 | DMI_MATCH(DMI_BOARD_VENDOR, | |
193 | "Matsushita Electric Industrial Co.,Ltd."), | |
194 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
195 | }, | |
196 | }, | |
197 | { | |
198 | .callback = init_nvs_nosave, | |
66f2fda9 JS |
199 | .ident = "Sony Vaio VGN-FW41E_H", |
200 | .matches = { | |
201 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
202 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"), | |
203 | }, | |
204 | }, | |
205 | { | |
206 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
207 | .ident = "Sony Vaio VGN-FW21E", |
208 | .matches = { | |
209 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
210 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
211 | }, | |
212 | }, | |
213 | { | |
214 | .callback = init_nvs_nosave, | |
469dd1c4 FV |
215 | .ident = "Sony Vaio VGN-FW21M", |
216 | .matches = { | |
217 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
218 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"), | |
219 | }, | |
220 | }, | |
221 | { | |
222 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
223 | .ident = "Sony Vaio VPCEB17FX", |
224 | .matches = { | |
225 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
226 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
227 | }, | |
228 | }, | |
229 | { | |
230 | .callback = init_nvs_nosave, | |
231 | .ident = "Sony Vaio VGN-SR11M", | |
232 | .matches = { | |
233 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
234 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
235 | }, | |
236 | }, | |
237 | { | |
238 | .callback = init_nvs_nosave, | |
239 | .ident = "Everex StepNote Series", | |
240 | .matches = { | |
241 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
242 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
243 | }, | |
244 | }, | |
245 | { | |
246 | .callback = init_nvs_nosave, | |
247 | .ident = "Sony Vaio VPCEB1Z1E", | |
248 | .matches = { | |
249 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
250 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
251 | }, | |
252 | }, | |
253 | { | |
254 | .callback = init_nvs_nosave, | |
255 | .ident = "Sony Vaio VGN-NW130D", | |
256 | .matches = { | |
257 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
258 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
259 | }, | |
260 | }, | |
261 | { | |
262 | .callback = init_nvs_nosave, | |
263 | .ident = "Sony Vaio VPCCW29FX", | |
264 | .matches = { | |
265 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
266 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
267 | }, | |
268 | }, | |
269 | { | |
270 | .callback = init_nvs_nosave, | |
271 | .ident = "Averatec AV1020-ED2", | |
272 | .matches = { | |
273 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
274 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
275 | }, | |
276 | }, | |
277 | { | |
278 | .callback = init_old_suspend_ordering, | |
279 | .ident = "Asus A8N-SLI DELUXE", | |
280 | .matches = { | |
281 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
282 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
283 | }, | |
284 | }, | |
285 | { | |
286 | .callback = init_old_suspend_ordering, | |
287 | .ident = "Asus A8N-SLI Premium", | |
288 | .matches = { | |
289 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
290 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
291 | }, | |
292 | }, | |
293 | { | |
294 | .callback = init_nvs_nosave, | |
295 | .ident = "Sony Vaio VGN-SR26GN_P", | |
296 | .matches = { | |
297 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
298 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
299 | }, | |
300 | }, | |
301 | { | |
302 | .callback = init_nvs_nosave, | |
303 | .ident = "Sony Vaio VPCEB1S1E", | |
304 | .matches = { | |
305 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
306 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), | |
307 | }, | |
308 | }, | |
309 | { | |
310 | .callback = init_nvs_nosave, | |
311 | .ident = "Sony Vaio VGN-FW520F", | |
312 | .matches = { | |
313 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
314 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
315 | }, | |
316 | }, | |
317 | { | |
318 | .callback = init_nvs_nosave, | |
319 | .ident = "Asus K54C", | |
320 | .matches = { | |
321 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
322 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
323 | }, | |
324 | }, | |
325 | { | |
326 | .callback = init_nvs_nosave, | |
327 | .ident = "Asus K54HR", | |
328 | .matches = { | |
329 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
330 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
331 | }, | |
332 | }, | |
cbc00c13 ZR |
333 | /* |
334 | * https://bugzilla.kernel.org/show_bug.cgi?id=189431 | |
335 | * Lenovo G50-45 is a platform later than 2012, but needs nvs memory | |
336 | * saving during S3. | |
337 | */ | |
338 | { | |
339 | .callback = init_nvs_save_s3, | |
340 | .ident = "Lenovo G50-45", | |
341 | .matches = { | |
342 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
343 | DMI_MATCH(DMI_PRODUCT_NAME, "80E3"), | |
344 | }, | |
345 | }, | |
0ac1b1d7 ZR |
346 | {}, |
347 | }; | |
348 | ||
8b691c9c | 349 | static void __init acpi_sleep_dmi_check(void) |
0ac1b1d7 | 350 | { |
821d6f03 LT |
351 | int year; |
352 | ||
353 | if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year >= 2012) | |
354 | acpi_nvs_nosave_s3(); | |
355 | ||
0ac1b1d7 ZR |
356 | dmi_check_system(acpisleep_dmi_table); |
357 | } | |
358 | ||
d8f3de0d | 359 | /** |
d5a64513 | 360 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 361 | */ |
d5a64513 | 362 | static int acpi_pm_freeze(void) |
d8f3de0d | 363 | { |
3d97e426 | 364 | acpi_disable_all_gpes(); |
bd6f10a5 | 365 | acpi_os_wait_events_complete(); |
fe955682 | 366 | acpi_ec_block_transactions(); |
d8f3de0d RW |
367 | return 0; |
368 | } | |
369 | ||
c5f7a1bb RW |
370 | /** |
371 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
372 | */ | |
373 | static int acpi_pm_pre_suspend(void) | |
374 | { | |
375 | acpi_pm_freeze(); | |
26fcaf60 | 376 | return suspend_nvs_save(); |
c5f7a1bb RW |
377 | } |
378 | ||
d8f3de0d RW |
379 | /** |
380 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
381 | * | |
382 | * If necessary, set the firmware waking vector and do arch-specific | |
383 | * nastiness to get the wakeup code to the waking vector. | |
384 | */ | |
385 | static int __acpi_pm_prepare(void) | |
386 | { | |
387 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
388 | if (error) |
389 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 390 | |
d8f3de0d RW |
391 | return error; |
392 | } | |
393 | ||
394 | /** | |
395 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
396 | * state and disable the GPEs. | |
397 | */ | |
398 | static int acpi_pm_prepare(void) | |
399 | { | |
400 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 401 | if (!error) |
26fcaf60 | 402 | error = acpi_pm_pre_suspend(); |
d5a64513 | 403 | |
d8f3de0d RW |
404 | return error; |
405 | } | |
406 | ||
c10d7a13 DD |
407 | static int find_powerf_dev(struct device *dev, void *data) |
408 | { | |
409 | struct acpi_device *device = to_acpi_device(dev); | |
410 | const char *hid = acpi_device_hid(device); | |
411 | ||
412 | return !strcmp(hid, ACPI_BUTTON_HID_POWERF); | |
413 | } | |
414 | ||
d8f3de0d RW |
415 | /** |
416 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
417 | * | |
418 | * This is called after we wake back up (or if entering the sleep state | |
419 | * failed). | |
420 | */ | |
421 | static void acpi_pm_finish(void) | |
422 | { | |
c10d7a13 | 423 | struct device *pwr_btn_dev; |
d8f3de0d RW |
424 | u32 acpi_state = acpi_target_sleep_state; |
425 | ||
42de5532 | 426 | acpi_ec_unblock_transactions(); |
d551d81d | 427 | suspend_nvs_free(); |
2a6b6976 | 428 | |
d8f3de0d RW |
429 | if (acpi_state == ACPI_STATE_S0) |
430 | return; | |
1da177e4 | 431 | |
d8f3de0d RW |
432 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
433 | acpi_state); | |
78f5f023 | 434 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
435 | acpi_leave_sleep_state(acpi_state); |
436 | ||
437 | /* reset firmware waking vector */ | |
e3e9b577 | 438 | acpi_set_waking_vector(0); |
d8f3de0d RW |
439 | |
440 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c10d7a13 | 441 | |
781d737c RW |
442 | acpi_resume_power_resources(); |
443 | ||
c10d7a13 DD |
444 | /* If we were woken with the fixed power button, provide a small |
445 | * hint to userspace in the form of a wakeup event on the fixed power | |
446 | * button device (if it can be found). | |
447 | * | |
448 | * We delay the event generation til now, as the PM layer requires | |
449 | * timekeeping to be running before we generate events. */ | |
450 | if (!pwr_btn_event_pending) | |
451 | return; | |
452 | ||
453 | pwr_btn_event_pending = false; | |
454 | pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, | |
455 | find_powerf_dev); | |
456 | if (pwr_btn_dev) { | |
457 | pm_wakeup_event(pwr_btn_dev, 0); | |
458 | put_device(pwr_btn_dev); | |
459 | } | |
d8f3de0d RW |
460 | } |
461 | ||
462 | /** | |
ad07277e RW |
463 | * acpi_pm_start - Start system PM transition. |
464 | */ | |
465 | static void acpi_pm_start(u32 acpi_state) | |
466 | { | |
467 | acpi_target_sleep_state = acpi_state; | |
468 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
469 | acpi_scan_lock_acquire(); | |
470 | } | |
471 | ||
472 | /** | |
473 | * acpi_pm_end - Finish up system PM transition. | |
d8f3de0d RW |
474 | */ |
475 | static void acpi_pm_end(void) | |
476 | { | |
8ece1d83 | 477 | acpi_turn_off_unused_power_resources(); |
ad07277e | 478 | acpi_scan_lock_release(); |
d8f3de0d RW |
479 | /* |
480 | * This is necessary in case acpi_pm_finish() is not called during a | |
481 | * failing transition to a sleep state. | |
482 | */ | |
483 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 484 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 485 | } |
92daa7b5 RW |
486 | #else /* !CONFIG_ACPI_SLEEP */ |
487 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
0ac1b1d7 | 488 | static inline void acpi_sleep_dmi_check(void) {} |
5d1e072b | 489 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 490 | |
d8f3de0d | 491 | #ifdef CONFIG_SUSPEND |
1da177e4 | 492 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
493 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
494 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
495 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 496 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
497 | }; |
498 | ||
e9b3aba8 | 499 | /** |
2c6e33c3 | 500 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
501 | * associated with given @pm_state, if supported. |
502 | */ | |
2c6e33c3 | 503 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
504 | { |
505 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
ad07277e | 506 | int error; |
e9b3aba8 | 507 | |
1bad2f19 | 508 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
509 | if (error) |
510 | return error; | |
511 | ||
ad07277e RW |
512 | if (!sleep_states[acpi_state]) { |
513 | pr_err("ACPI does not support sleep state S%u\n", acpi_state); | |
514 | return -ENOSYS; | |
e9b3aba8 | 515 | } |
ef25ba04 RW |
516 | if (acpi_state > ACPI_STATE_S1) |
517 | pm_set_suspend_via_firmware(); | |
ad07277e RW |
518 | |
519 | acpi_pm_start(acpi_state); | |
520 | return 0; | |
e9b3aba8 RW |
521 | } |
522 | ||
1da177e4 | 523 | /** |
2c6e33c3 | 524 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 525 | * @pm_state: ignored |
1da177e4 | 526 | * |
50ad147a RW |
527 | * Flush caches and go to sleep. For STR we have to call arch-specific |
528 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
529 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
530 | */ | |
2c6e33c3 | 531 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
532 | { |
533 | acpi_status status = AE_OK; | |
e9b3aba8 | 534 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 535 | int error; |
1da177e4 LT |
536 | |
537 | ACPI_FLUSH_CPU_CACHE(); | |
538 | ||
bb3632c6 | 539 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true); |
e9b3aba8 RW |
540 | switch (acpi_state) { |
541 | case ACPI_STATE_S1: | |
1da177e4 | 542 | barrier(); |
3f6f49c7 | 543 | status = acpi_enter_sleep_state(acpi_state); |
1da177e4 LT |
544 | break; |
545 | ||
e9b3aba8 | 546 | case ACPI_STATE_S3: |
d6a77ead KRW |
547 | if (!acpi_suspend_lowlevel) |
548 | return -ENOSYS; | |
f1a2003e | 549 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
550 | if (error) |
551 | return error; | |
7a63f08b | 552 | pr_info(PREFIX "Low-level resume complete\n"); |
ef25ba04 | 553 | pm_set_resume_via_firmware(); |
1da177e4 | 554 | break; |
1da177e4 | 555 | } |
bb3632c6 | 556 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false); |
872d83d0 | 557 | |
b6dacf63 MG |
558 | /* This violates the spec but is required for bug compatibility. */ |
559 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 560 | |
3f6f49c7 LB |
561 | /* Reprogram control registers */ |
562 | acpi_leave_sleep_state_prep(acpi_state); | |
c95d47a8 | 563 | |
23b168d4 | 564 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
565 | * of the OSPM to clear the status bit [ implying that the |
566 | * POWER_BUTTON event should not reach userspace ] | |
c10d7a13 DD |
567 | * |
568 | * However, we do generate a small hint for userspace in the form of | |
569 | * a wakeup event. We flag this condition for now and generate the | |
570 | * event later, as we're currently too early in resume to be able to | |
571 | * generate wakeup events. | |
872d83d0 | 572 | */ |
c10d7a13 | 573 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
51468a9d | 574 | acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED; |
c10d7a13 DD |
575 | |
576 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); | |
577 | ||
18864cc4 | 578 | if (pwr_btn_status & ACPI_EVENT_FLAG_STATUS_SET) { |
c10d7a13 DD |
579 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); |
580 | /* Flag for later */ | |
581 | pwr_btn_event_pending = true; | |
582 | } | |
583 | } | |
872d83d0 | 584 | |
a3627f67 SL |
585 | /* |
586 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
587 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
588 | * acpi_leave_sleep_state will reenable specific GPEs later | |
589 | */ | |
3d97e426 | 590 | acpi_disable_all_gpes(); |
d5a64513 | 591 | /* Allow EC transactions to happen. */ |
c2b46d67 | 592 | acpi_ec_unblock_transactions(); |
a3627f67 | 593 | |
2a6b6976 MG |
594 | suspend_nvs_restore(); |
595 | ||
1da177e4 LT |
596 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
597 | } | |
598 | ||
2c6e33c3 | 599 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 600 | { |
e8c9c502 | 601 | u32 acpi_state; |
eb9289eb | 602 | |
e8c9c502 JB |
603 | switch (pm_state) { |
604 | case PM_SUSPEND_ON: | |
605 | case PM_SUSPEND_STANDBY: | |
606 | case PM_SUSPEND_MEM: | |
607 | acpi_state = acpi_suspend_states[pm_state]; | |
608 | ||
609 | return sleep_states[acpi_state]; | |
610 | default: | |
611 | return 0; | |
612 | } | |
eb9289eb SL |
613 | } |
614 | ||
2f55ac07 | 615 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
616 | .valid = acpi_suspend_state_valid, |
617 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 618 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 619 | .enter = acpi_suspend_enter, |
618d7fd0 | 620 | .wake = acpi_pm_finish, |
d8f3de0d RW |
621 | .end = acpi_pm_end, |
622 | }; | |
623 | ||
624 | /** | |
625 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
626 | * state associated with given @pm_state, if supported, and | |
627 | * execute the _PTS control method. This function is used if the | |
628 | * pre-ACPI 2.0 suspend ordering has been requested. | |
629 | */ | |
630 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
631 | { | |
632 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
633 | if (!error) |
634 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 635 | |
d8f3de0d RW |
636 | return error; |
637 | } | |
638 | ||
639 | /* | |
640 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
641 | * been requested. | |
642 | */ | |
2f55ac07 | 643 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
644 | .valid = acpi_suspend_state_valid, |
645 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 646 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 647 | .enter = acpi_suspend_enter, |
618d7fd0 | 648 | .wake = acpi_pm_finish, |
d8f3de0d RW |
649 | .end = acpi_pm_end, |
650 | .recover = acpi_pm_finish, | |
1da177e4 | 651 | }; |
02040f0b | 652 | |
1f0b6386 RW |
653 | static int acpi_freeze_begin(void) |
654 | { | |
655 | acpi_scan_lock_acquire(); | |
656 | return 0; | |
657 | } | |
658 | ||
a8d46b9e RW |
659 | static int acpi_freeze_prepare(void) |
660 | { | |
7b02ccea | 661 | acpi_enable_wakeup_devices(ACPI_STATE_S0); |
a8d46b9e | 662 | acpi_enable_all_wakeup_gpes(); |
c52fa70c | 663 | acpi_os_wait_events_complete(); |
8c01275e CY |
664 | if (acpi_sci_irq_valid()) |
665 | enable_irq_wake(acpi_sci_irq); | |
a8d46b9e RW |
666 | return 0; |
667 | } | |
668 | ||
669 | static void acpi_freeze_restore(void) | |
670 | { | |
7b02ccea | 671 | acpi_disable_wakeup_devices(ACPI_STATE_S0); |
8c01275e CY |
672 | if (acpi_sci_irq_valid()) |
673 | disable_irq_wake(acpi_sci_irq); | |
a8d46b9e RW |
674 | acpi_enable_all_runtime_gpes(); |
675 | } | |
676 | ||
1f0b6386 RW |
677 | static void acpi_freeze_end(void) |
678 | { | |
679 | acpi_scan_lock_release(); | |
680 | } | |
681 | ||
682 | static const struct platform_freeze_ops acpi_freeze_ops = { | |
683 | .begin = acpi_freeze_begin, | |
a8d46b9e RW |
684 | .prepare = acpi_freeze_prepare, |
685 | .restore = acpi_freeze_restore, | |
1f0b6386 RW |
686 | .end = acpi_freeze_end, |
687 | }; | |
688 | ||
02040f0b RW |
689 | static void acpi_sleep_suspend_setup(void) |
690 | { | |
691 | int i; | |
692 | ||
a4e90bed RW |
693 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) |
694 | if (acpi_sleep_state_supported(i)) | |
02040f0b | 695 | sleep_states[i] = 1; |
02040f0b RW |
696 | |
697 | suspend_set_ops(old_suspend_ordering ? | |
698 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
1f0b6386 | 699 | freeze_set_ops(&acpi_freeze_ops); |
02040f0b | 700 | } |
1f0b6386 | 701 | |
02040f0b RW |
702 | #else /* !CONFIG_SUSPEND */ |
703 | static inline void acpi_sleep_suspend_setup(void) {} | |
704 | #endif /* !CONFIG_SUSPEND */ | |
296699de | 705 | |
504997cf SH |
706 | #ifdef CONFIG_PM_SLEEP |
707 | static u32 saved_bm_rld; | |
708 | ||
709 | static int acpi_save_bm_rld(void) | |
710 | { | |
711 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld); | |
712 | return 0; | |
713 | } | |
714 | ||
715 | static void acpi_restore_bm_rld(void) | |
716 | { | |
717 | u32 resumed_bm_rld = 0; | |
718 | ||
719 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld); | |
720 | if (resumed_bm_rld == saved_bm_rld) | |
721 | return; | |
722 | ||
723 | acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld); | |
724 | } | |
725 | ||
726 | static struct syscore_ops acpi_sleep_syscore_ops = { | |
727 | .suspend = acpi_save_bm_rld, | |
728 | .resume = acpi_restore_bm_rld, | |
729 | }; | |
730 | ||
731 | void acpi_sleep_syscore_init(void) | |
732 | { | |
733 | register_syscore_ops(&acpi_sleep_syscore_ops); | |
734 | } | |
735 | #else | |
736 | static inline void acpi_sleep_syscore_init(void) {} | |
737 | #endif /* CONFIG_PM_SLEEP */ | |
738 | ||
b0cb1a19 | 739 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
740 | static unsigned long s4_hardware_signature; |
741 | static struct acpi_table_facs *facs; | |
742 | static bool nosigcheck; | |
743 | ||
744 | void __init acpi_no_s4_hw_signature(void) | |
745 | { | |
746 | nosigcheck = true; | |
747 | } | |
748 | ||
caea99ef | 749 | static int acpi_hibernation_begin(void) |
74f270af | 750 | { |
3f4b0ef7 RW |
751 | int error; |
752 | ||
72ad5d77 | 753 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
ad07277e RW |
754 | if (!error) |
755 | acpi_pm_start(ACPI_STATE_S4); | |
3f4b0ef7 RW |
756 | |
757 | return error; | |
758 | } | |
759 | ||
a3d25c27 RW |
760 | static int acpi_hibernation_enter(void) |
761 | { | |
762 | acpi_status status = AE_OK; | |
a3d25c27 RW |
763 | |
764 | ACPI_FLUSH_CPU_CACHE(); | |
765 | ||
a3d25c27 | 766 | /* This shouldn't return. If it returns, we have a problem */ |
3f6f49c7 LB |
767 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
768 | /* Reprogram control registers */ | |
769 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
770 | |
771 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
772 | } | |
773 | ||
c7e0831d RW |
774 | static void acpi_hibernation_leave(void) |
775 | { | |
fbda4b38 | 776 | pm_set_resume_via_firmware(); |
c7e0831d RW |
777 | /* |
778 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
779 | * enable it here. | |
780 | */ | |
781 | acpi_enable(); | |
3f6f49c7 LB |
782 | /* Reprogram control registers */ |
783 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c | 784 | /* Check the hardware signature */ |
5c551e62 ON |
785 | if (facs && s4_hardware_signature != facs->hardware_signature) |
786 | pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n"); | |
3f4b0ef7 | 787 | /* Restore the NVS memory area */ |
dd4c4f17 | 788 | suspend_nvs_restore(); |
d5a64513 | 789 | /* Allow EC transactions to happen. */ |
c2b46d67 | 790 | acpi_ec_unblock_transactions(); |
c7e0831d RW |
791 | } |
792 | ||
d5a64513 | 793 | static void acpi_pm_thaw(void) |
f6bb13aa | 794 | { |
fe955682 | 795 | acpi_ec_unblock_transactions(); |
3d97e426 | 796 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
797 | } |
798 | ||
073ef1f6 | 799 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
800 | .begin = acpi_hibernation_begin, |
801 | .end = acpi_pm_end, | |
c5f7a1bb | 802 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 803 | .finish = acpi_pm_finish, |
d8f3de0d RW |
804 | .prepare = acpi_pm_prepare, |
805 | .enter = acpi_hibernation_enter, | |
806 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
807 | .pre_restore = acpi_pm_freeze, |
808 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 809 | }; |
caea99ef | 810 | |
d8f3de0d RW |
811 | /** |
812 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
813 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
814 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
815 | * requested. | |
816 | */ | |
817 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 818 | { |
e49f711c ZY |
819 | int error; |
820 | /* | |
821 | * The _TTS object should always be evaluated before the _PTS object. | |
822 | * When the old_suspended_ordering is true, the _PTS object is | |
823 | * evaluated in the acpi_sleep_prepare. | |
824 | */ | |
825 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
826 | ||
827 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 828 | |
3f4b0ef7 | 829 | if (!error) { |
72ad5d77 | 830 | if (!nvs_nosave) |
dd4c4f17 | 831 | error = suspend_nvs_alloc(); |
ad07277e | 832 | if (!error) { |
3f4b0ef7 | 833 | acpi_target_sleep_state = ACPI_STATE_S4; |
ad07277e RW |
834 | acpi_scan_lock_acquire(); |
835 | } | |
3f4b0ef7 RW |
836 | } |
837 | return error; | |
838 | } | |
839 | ||
d8f3de0d RW |
840 | /* |
841 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
842 | * been requested. | |
843 | */ | |
073ef1f6 | 844 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
845 | .begin = acpi_hibernation_begin_old, |
846 | .end = acpi_pm_end, | |
c5f7a1bb | 847 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 848 | .prepare = acpi_pm_freeze, |
2a6b6976 | 849 | .finish = acpi_pm_finish, |
a3d25c27 | 850 | .enter = acpi_hibernation_enter, |
c7e0831d | 851 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
852 | .pre_restore = acpi_pm_freeze, |
853 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 854 | .recover = acpi_pm_finish, |
a3d25c27 | 855 | }; |
02040f0b RW |
856 | |
857 | static void acpi_sleep_hibernate_setup(void) | |
858 | { | |
a4e90bed | 859 | if (!acpi_sleep_state_supported(ACPI_STATE_S4)) |
02040f0b RW |
860 | return; |
861 | ||
862 | hibernation_set_ops(old_suspend_ordering ? | |
863 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
864 | sleep_states[ACPI_STATE_S4] = 1; | |
02040f0b RW |
865 | if (nosigcheck) |
866 | return; | |
867 | ||
868 | acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); | |
869 | if (facs) | |
870 | s4_hardware_signature = facs->hardware_signature; | |
871 | } | |
872 | #else /* !CONFIG_HIBERNATION */ | |
873 | static inline void acpi_sleep_hibernate_setup(void) {} | |
874 | #endif /* !CONFIG_HIBERNATION */ | |
a3d25c27 | 875 | |
f216cc37 AS |
876 | static void acpi_power_off_prepare(void) |
877 | { | |
878 | /* Prepare to power off the system */ | |
879 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 880 | acpi_disable_all_gpes(); |
c52fa70c | 881 | acpi_os_wait_events_complete(); |
f216cc37 AS |
882 | } |
883 | ||
884 | static void acpi_power_off(void) | |
885 | { | |
886 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 887 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 888 | local_irq_disable(); |
3f6f49c7 | 889 | acpi_enter_sleep_state(ACPI_STATE_S5); |
96f15efc LB |
890 | } |
891 | ||
aafbcd16 | 892 | int __init acpi_sleep_init(void) |
1da177e4 | 893 | { |
ed4cf5b2 JP |
894 | char supported[ACPI_S_STATE_COUNT * 3 + 1]; |
895 | char *pos = supported; | |
896 | int i; | |
1da177e4 | 897 | |
0ac1b1d7 ZR |
898 | acpi_sleep_dmi_check(); |
899 | ||
5a50fe70 | 900 | sleep_states[ACPI_STATE_S0] = 1; |
5a50fe70 | 901 | |
504997cf | 902 | acpi_sleep_syscore_init(); |
02040f0b RW |
903 | acpi_sleep_suspend_setup(); |
904 | acpi_sleep_hibernate_setup(); | |
1da177e4 | 905 | |
a4e90bed | 906 | if (acpi_sleep_state_supported(ACPI_STATE_S5)) { |
f216cc37 | 907 | sleep_states[ACPI_STATE_S5] = 1; |
f216cc37 AS |
908 | pm_power_off_prepare = acpi_power_off_prepare; |
909 | pm_power_off = acpi_power_off; | |
13737181 CY |
910 | } else { |
911 | acpi_no_s5 = true; | |
f216cc37 | 912 | } |
ed4cf5b2 JP |
913 | |
914 | supported[0] = 0; | |
915 | for (i = 0; i < ACPI_S_STATE_COUNT; i++) { | |
916 | if (sleep_states[i]) | |
917 | pos += sprintf(pos, " S%d", i); | |
918 | } | |
919 | pr_info(PREFIX "(supports%s)\n", supported); | |
920 | ||
e49f711c | 921 | /* |
9713adc2 RW |
922 | * Register the tts_notifier to reboot notifier list so that the _TTS |
923 | * object can also be evaluated when the system enters S5. | |
e49f711c | 924 | */ |
9713adc2 | 925 | register_reboot_notifier(&tts_notifier); |
1da177e4 LT |
926 | return 0; |
927 | } |