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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 | ||
d8f3de0d RW |
133 | /* |
134 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
135 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
136 | * kernel command line option that causes the following variable to be set. | |
137 | */ | |
138 | static bool old_suspend_ordering; | |
139 | ||
140 | void __init acpi_old_suspend_ordering(void) | |
141 | { | |
142 | old_suspend_ordering = true; | |
143 | } | |
144 | ||
0ac1b1d7 ZR |
145 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
146 | { | |
147 | acpi_old_suspend_ordering(); | |
148 | return 0; | |
149 | } | |
150 | ||
151 | static int __init init_nvs_nosave(const struct dmi_system_id *d) | |
152 | { | |
153 | acpi_nvs_nosave(); | |
154 | return 0; | |
155 | } | |
156 | ||
3e4376ff | 157 | static struct dmi_system_id acpisleep_dmi_table[] __initdata = { |
0ac1b1d7 ZR |
158 | { |
159 | .callback = init_old_suspend_ordering, | |
160 | .ident = "Abit KN9 (nForce4 variant)", | |
161 | .matches = { | |
162 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
163 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
164 | }, | |
165 | }, | |
166 | { | |
167 | .callback = init_old_suspend_ordering, | |
168 | .ident = "HP xw4600 Workstation", | |
169 | .matches = { | |
170 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
171 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
172 | }, | |
173 | }, | |
174 | { | |
175 | .callback = init_old_suspend_ordering, | |
176 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
177 | .matches = { | |
178 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
179 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
180 | }, | |
181 | }, | |
182 | { | |
183 | .callback = init_old_suspend_ordering, | |
184 | .ident = "Panasonic CF51-2L", | |
185 | .matches = { | |
186 | DMI_MATCH(DMI_BOARD_VENDOR, | |
187 | "Matsushita Electric Industrial Co.,Ltd."), | |
188 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
189 | }, | |
190 | }, | |
191 | { | |
192 | .callback = init_nvs_nosave, | |
66f2fda9 JS |
193 | .ident = "Sony Vaio VGN-FW41E_H", |
194 | .matches = { | |
195 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
196 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"), | |
197 | }, | |
198 | }, | |
199 | { | |
200 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
201 | .ident = "Sony Vaio VGN-FW21E", |
202 | .matches = { | |
203 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
204 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
205 | }, | |
206 | }, | |
207 | { | |
208 | .callback = init_nvs_nosave, | |
469dd1c4 FV |
209 | .ident = "Sony Vaio VGN-FW21M", |
210 | .matches = { | |
211 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
212 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"), | |
213 | }, | |
214 | }, | |
215 | { | |
216 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
217 | .ident = "Sony Vaio VPCEB17FX", |
218 | .matches = { | |
219 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
220 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
221 | }, | |
222 | }, | |
223 | { | |
224 | .callback = init_nvs_nosave, | |
225 | .ident = "Sony Vaio VGN-SR11M", | |
226 | .matches = { | |
227 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
228 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
229 | }, | |
230 | }, | |
231 | { | |
232 | .callback = init_nvs_nosave, | |
233 | .ident = "Everex StepNote Series", | |
234 | .matches = { | |
235 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
236 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
237 | }, | |
238 | }, | |
239 | { | |
240 | .callback = init_nvs_nosave, | |
241 | .ident = "Sony Vaio VPCEB1Z1E", | |
242 | .matches = { | |
243 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
244 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
245 | }, | |
246 | }, | |
247 | { | |
248 | .callback = init_nvs_nosave, | |
249 | .ident = "Sony Vaio VGN-NW130D", | |
250 | .matches = { | |
251 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
252 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
253 | }, | |
254 | }, | |
255 | { | |
256 | .callback = init_nvs_nosave, | |
257 | .ident = "Sony Vaio VPCCW29FX", | |
258 | .matches = { | |
259 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
260 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
261 | }, | |
262 | }, | |
263 | { | |
264 | .callback = init_nvs_nosave, | |
265 | .ident = "Averatec AV1020-ED2", | |
266 | .matches = { | |
267 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
268 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
269 | }, | |
270 | }, | |
271 | { | |
272 | .callback = init_old_suspend_ordering, | |
273 | .ident = "Asus A8N-SLI DELUXE", | |
274 | .matches = { | |
275 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
276 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
277 | }, | |
278 | }, | |
279 | { | |
280 | .callback = init_old_suspend_ordering, | |
281 | .ident = "Asus A8N-SLI Premium", | |
282 | .matches = { | |
283 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
284 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
285 | }, | |
286 | }, | |
287 | { | |
288 | .callback = init_nvs_nosave, | |
289 | .ident = "Sony Vaio VGN-SR26GN_P", | |
290 | .matches = { | |
291 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
292 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
293 | }, | |
294 | }, | |
295 | { | |
296 | .callback = init_nvs_nosave, | |
297 | .ident = "Sony Vaio VPCEB1S1E", | |
298 | .matches = { | |
299 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
300 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), | |
301 | }, | |
302 | }, | |
303 | { | |
304 | .callback = init_nvs_nosave, | |
305 | .ident = "Sony Vaio VGN-FW520F", | |
306 | .matches = { | |
307 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
308 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
309 | }, | |
310 | }, | |
311 | { | |
312 | .callback = init_nvs_nosave, | |
313 | .ident = "Asus K54C", | |
314 | .matches = { | |
315 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
316 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
317 | }, | |
318 | }, | |
319 | { | |
320 | .callback = init_nvs_nosave, | |
321 | .ident = "Asus K54HR", | |
322 | .matches = { | |
323 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
324 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
325 | }, | |
326 | }, | |
327 | {}, | |
328 | }; | |
329 | ||
8b691c9c | 330 | static void __init acpi_sleep_dmi_check(void) |
0ac1b1d7 | 331 | { |
821d6f03 LT |
332 | int year; |
333 | ||
334 | if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year >= 2012) | |
335 | acpi_nvs_nosave_s3(); | |
336 | ||
0ac1b1d7 ZR |
337 | dmi_check_system(acpisleep_dmi_table); |
338 | } | |
339 | ||
d8f3de0d | 340 | /** |
d5a64513 | 341 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 342 | */ |
d5a64513 | 343 | static int acpi_pm_freeze(void) |
d8f3de0d | 344 | { |
3d97e426 | 345 | acpi_disable_all_gpes(); |
bd6f10a5 | 346 | acpi_os_wait_events_complete(); |
fe955682 | 347 | acpi_ec_block_transactions(); |
d8f3de0d RW |
348 | return 0; |
349 | } | |
350 | ||
c5f7a1bb RW |
351 | /** |
352 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
353 | */ | |
354 | static int acpi_pm_pre_suspend(void) | |
355 | { | |
356 | acpi_pm_freeze(); | |
26fcaf60 | 357 | return suspend_nvs_save(); |
c5f7a1bb RW |
358 | } |
359 | ||
d8f3de0d RW |
360 | /** |
361 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
362 | * | |
363 | * If necessary, set the firmware waking vector and do arch-specific | |
364 | * nastiness to get the wakeup code to the waking vector. | |
365 | */ | |
366 | static int __acpi_pm_prepare(void) | |
367 | { | |
368 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
369 | if (error) |
370 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 371 | |
d8f3de0d RW |
372 | return error; |
373 | } | |
374 | ||
375 | /** | |
376 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
377 | * state and disable the GPEs. | |
378 | */ | |
379 | static int acpi_pm_prepare(void) | |
380 | { | |
381 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 382 | if (!error) |
26fcaf60 | 383 | error = acpi_pm_pre_suspend(); |
d5a64513 | 384 | |
d8f3de0d RW |
385 | return error; |
386 | } | |
387 | ||
c10d7a13 DD |
388 | static int find_powerf_dev(struct device *dev, void *data) |
389 | { | |
390 | struct acpi_device *device = to_acpi_device(dev); | |
391 | const char *hid = acpi_device_hid(device); | |
392 | ||
393 | return !strcmp(hid, ACPI_BUTTON_HID_POWERF); | |
394 | } | |
395 | ||
d8f3de0d RW |
396 | /** |
397 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
398 | * | |
399 | * This is called after we wake back up (or if entering the sleep state | |
400 | * failed). | |
401 | */ | |
402 | static void acpi_pm_finish(void) | |
403 | { | |
c10d7a13 | 404 | struct device *pwr_btn_dev; |
d8f3de0d RW |
405 | u32 acpi_state = acpi_target_sleep_state; |
406 | ||
42de5532 | 407 | acpi_ec_unblock_transactions(); |
d551d81d | 408 | suspend_nvs_free(); |
2a6b6976 | 409 | |
d8f3de0d RW |
410 | if (acpi_state == ACPI_STATE_S0) |
411 | return; | |
1da177e4 | 412 | |
d8f3de0d RW |
413 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
414 | acpi_state); | |
78f5f023 | 415 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
416 | acpi_leave_sleep_state(acpi_state); |
417 | ||
418 | /* reset firmware waking vector */ | |
e3e9b577 | 419 | acpi_set_waking_vector(0); |
d8f3de0d RW |
420 | |
421 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c10d7a13 | 422 | |
781d737c RW |
423 | acpi_resume_power_resources(); |
424 | ||
c10d7a13 DD |
425 | /* If we were woken with the fixed power button, provide a small |
426 | * hint to userspace in the form of a wakeup event on the fixed power | |
427 | * button device (if it can be found). | |
428 | * | |
429 | * We delay the event generation til now, as the PM layer requires | |
430 | * timekeeping to be running before we generate events. */ | |
431 | if (!pwr_btn_event_pending) | |
432 | return; | |
433 | ||
434 | pwr_btn_event_pending = false; | |
435 | pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, | |
436 | find_powerf_dev); | |
437 | if (pwr_btn_dev) { | |
438 | pm_wakeup_event(pwr_btn_dev, 0); | |
439 | put_device(pwr_btn_dev); | |
440 | } | |
d8f3de0d RW |
441 | } |
442 | ||
443 | /** | |
ad07277e RW |
444 | * acpi_pm_start - Start system PM transition. |
445 | */ | |
446 | static void acpi_pm_start(u32 acpi_state) | |
447 | { | |
448 | acpi_target_sleep_state = acpi_state; | |
449 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
450 | acpi_scan_lock_acquire(); | |
451 | } | |
452 | ||
453 | /** | |
454 | * acpi_pm_end - Finish up system PM transition. | |
d8f3de0d RW |
455 | */ |
456 | static void acpi_pm_end(void) | |
457 | { | |
ad07277e | 458 | acpi_scan_lock_release(); |
d8f3de0d RW |
459 | /* |
460 | * This is necessary in case acpi_pm_finish() is not called during a | |
461 | * failing transition to a sleep state. | |
462 | */ | |
463 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 464 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 465 | } |
92daa7b5 RW |
466 | #else /* !CONFIG_ACPI_SLEEP */ |
467 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
0ac1b1d7 | 468 | static inline void acpi_sleep_dmi_check(void) {} |
5d1e072b | 469 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 470 | |
d8f3de0d | 471 | #ifdef CONFIG_SUSPEND |
1da177e4 | 472 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
473 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
474 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
475 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 476 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
477 | }; |
478 | ||
e9b3aba8 | 479 | /** |
2c6e33c3 | 480 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
481 | * associated with given @pm_state, if supported. |
482 | */ | |
2c6e33c3 | 483 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
484 | { |
485 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
ad07277e | 486 | int error; |
e9b3aba8 | 487 | |
1bad2f19 | 488 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
489 | if (error) |
490 | return error; | |
491 | ||
ad07277e RW |
492 | if (!sleep_states[acpi_state]) { |
493 | pr_err("ACPI does not support sleep state S%u\n", acpi_state); | |
494 | return -ENOSYS; | |
e9b3aba8 | 495 | } |
ef25ba04 RW |
496 | if (acpi_state > ACPI_STATE_S1) |
497 | pm_set_suspend_via_firmware(); | |
ad07277e RW |
498 | |
499 | acpi_pm_start(acpi_state); | |
500 | return 0; | |
e9b3aba8 RW |
501 | } |
502 | ||
1da177e4 | 503 | /** |
2c6e33c3 | 504 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 505 | * @pm_state: ignored |
1da177e4 | 506 | * |
50ad147a RW |
507 | * Flush caches and go to sleep. For STR we have to call arch-specific |
508 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
509 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
510 | */ | |
2c6e33c3 | 511 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
512 | { |
513 | acpi_status status = AE_OK; | |
e9b3aba8 | 514 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 515 | int error; |
1da177e4 LT |
516 | |
517 | ACPI_FLUSH_CPU_CACHE(); | |
518 | ||
bb3632c6 | 519 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true); |
e9b3aba8 RW |
520 | switch (acpi_state) { |
521 | case ACPI_STATE_S1: | |
1da177e4 | 522 | barrier(); |
3f6f49c7 | 523 | status = acpi_enter_sleep_state(acpi_state); |
1da177e4 LT |
524 | break; |
525 | ||
e9b3aba8 | 526 | case ACPI_STATE_S3: |
d6a77ead KRW |
527 | if (!acpi_suspend_lowlevel) |
528 | return -ENOSYS; | |
f1a2003e | 529 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
530 | if (error) |
531 | return error; | |
7a63f08b | 532 | pr_info(PREFIX "Low-level resume complete\n"); |
ef25ba04 | 533 | pm_set_resume_via_firmware(); |
1da177e4 | 534 | break; |
1da177e4 | 535 | } |
bb3632c6 | 536 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false); |
872d83d0 | 537 | |
b6dacf63 MG |
538 | /* This violates the spec but is required for bug compatibility. */ |
539 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 540 | |
3f6f49c7 LB |
541 | /* Reprogram control registers */ |
542 | acpi_leave_sleep_state_prep(acpi_state); | |
c95d47a8 | 543 | |
23b168d4 | 544 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
545 | * of the OSPM to clear the status bit [ implying that the |
546 | * POWER_BUTTON event should not reach userspace ] | |
c10d7a13 DD |
547 | * |
548 | * However, we do generate a small hint for userspace in the form of | |
549 | * a wakeup event. We flag this condition for now and generate the | |
550 | * event later, as we're currently too early in resume to be able to | |
551 | * generate wakeup events. | |
872d83d0 | 552 | */ |
c10d7a13 | 553 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
51468a9d | 554 | acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED; |
c10d7a13 DD |
555 | |
556 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); | |
557 | ||
18864cc4 | 558 | if (pwr_btn_status & ACPI_EVENT_FLAG_STATUS_SET) { |
c10d7a13 DD |
559 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); |
560 | /* Flag for later */ | |
561 | pwr_btn_event_pending = true; | |
562 | } | |
563 | } | |
872d83d0 | 564 | |
a3627f67 SL |
565 | /* |
566 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
567 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
568 | * acpi_leave_sleep_state will reenable specific GPEs later | |
569 | */ | |
3d97e426 | 570 | acpi_disable_all_gpes(); |
d5a64513 | 571 | /* Allow EC transactions to happen. */ |
c2b46d67 | 572 | acpi_ec_unblock_transactions(); |
a3627f67 | 573 | |
2a6b6976 MG |
574 | suspend_nvs_restore(); |
575 | ||
1da177e4 LT |
576 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
577 | } | |
578 | ||
2c6e33c3 | 579 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 580 | { |
e8c9c502 | 581 | u32 acpi_state; |
eb9289eb | 582 | |
e8c9c502 JB |
583 | switch (pm_state) { |
584 | case PM_SUSPEND_ON: | |
585 | case PM_SUSPEND_STANDBY: | |
586 | case PM_SUSPEND_MEM: | |
587 | acpi_state = acpi_suspend_states[pm_state]; | |
588 | ||
589 | return sleep_states[acpi_state]; | |
590 | default: | |
591 | return 0; | |
592 | } | |
eb9289eb SL |
593 | } |
594 | ||
2f55ac07 | 595 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
596 | .valid = acpi_suspend_state_valid, |
597 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 598 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 599 | .enter = acpi_suspend_enter, |
618d7fd0 | 600 | .wake = acpi_pm_finish, |
d8f3de0d RW |
601 | .end = acpi_pm_end, |
602 | }; | |
603 | ||
604 | /** | |
605 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
606 | * state associated with given @pm_state, if supported, and | |
607 | * execute the _PTS control method. This function is used if the | |
608 | * pre-ACPI 2.0 suspend ordering has been requested. | |
609 | */ | |
610 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
611 | { | |
612 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
613 | if (!error) |
614 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 615 | |
d8f3de0d RW |
616 | return error; |
617 | } | |
618 | ||
619 | /* | |
620 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
621 | * been requested. | |
622 | */ | |
2f55ac07 | 623 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
624 | .valid = acpi_suspend_state_valid, |
625 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 626 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 627 | .enter = acpi_suspend_enter, |
618d7fd0 | 628 | .wake = acpi_pm_finish, |
d8f3de0d RW |
629 | .end = acpi_pm_end, |
630 | .recover = acpi_pm_finish, | |
1da177e4 | 631 | }; |
02040f0b | 632 | |
1f0b6386 RW |
633 | static int acpi_freeze_begin(void) |
634 | { | |
635 | acpi_scan_lock_acquire(); | |
636 | return 0; | |
637 | } | |
638 | ||
a8d46b9e RW |
639 | static int acpi_freeze_prepare(void) |
640 | { | |
7b02ccea | 641 | acpi_enable_wakeup_devices(ACPI_STATE_S0); |
a8d46b9e | 642 | acpi_enable_all_wakeup_gpes(); |
c52fa70c | 643 | acpi_os_wait_events_complete(); |
8c01275e CY |
644 | if (acpi_sci_irq_valid()) |
645 | enable_irq_wake(acpi_sci_irq); | |
a8d46b9e RW |
646 | return 0; |
647 | } | |
648 | ||
649 | static void acpi_freeze_restore(void) | |
650 | { | |
7b02ccea | 651 | acpi_disable_wakeup_devices(ACPI_STATE_S0); |
8c01275e CY |
652 | if (acpi_sci_irq_valid()) |
653 | disable_irq_wake(acpi_sci_irq); | |
a8d46b9e RW |
654 | acpi_enable_all_runtime_gpes(); |
655 | } | |
656 | ||
1f0b6386 RW |
657 | static void acpi_freeze_end(void) |
658 | { | |
659 | acpi_scan_lock_release(); | |
660 | } | |
661 | ||
662 | static const struct platform_freeze_ops acpi_freeze_ops = { | |
663 | .begin = acpi_freeze_begin, | |
a8d46b9e RW |
664 | .prepare = acpi_freeze_prepare, |
665 | .restore = acpi_freeze_restore, | |
1f0b6386 RW |
666 | .end = acpi_freeze_end, |
667 | }; | |
668 | ||
02040f0b RW |
669 | static void acpi_sleep_suspend_setup(void) |
670 | { | |
671 | int i; | |
672 | ||
a4e90bed RW |
673 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) |
674 | if (acpi_sleep_state_supported(i)) | |
02040f0b | 675 | sleep_states[i] = 1; |
02040f0b | 676 | |
08b98d32 RW |
677 | /* |
678 | * Use suspend-to-idle by default if ACPI_FADT_LOW_POWER_S0 is set and | |
679 | * the default suspend mode was not selected from the command line. | |
680 | */ | |
681 | if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0 && | |
682 | mem_sleep_default > PM_SUSPEND_MEM) | |
683 | mem_sleep_default = PM_SUSPEND_FREEZE; | |
684 | ||
02040f0b RW |
685 | suspend_set_ops(old_suspend_ordering ? |
686 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
1f0b6386 | 687 | freeze_set_ops(&acpi_freeze_ops); |
02040f0b | 688 | } |
1f0b6386 | 689 | |
02040f0b RW |
690 | #else /* !CONFIG_SUSPEND */ |
691 | static inline void acpi_sleep_suspend_setup(void) {} | |
692 | #endif /* !CONFIG_SUSPEND */ | |
296699de | 693 | |
504997cf SH |
694 | #ifdef CONFIG_PM_SLEEP |
695 | static u32 saved_bm_rld; | |
696 | ||
697 | static int acpi_save_bm_rld(void) | |
698 | { | |
699 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld); | |
700 | return 0; | |
701 | } | |
702 | ||
703 | static void acpi_restore_bm_rld(void) | |
704 | { | |
705 | u32 resumed_bm_rld = 0; | |
706 | ||
707 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld); | |
708 | if (resumed_bm_rld == saved_bm_rld) | |
709 | return; | |
710 | ||
711 | acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld); | |
712 | } | |
713 | ||
714 | static struct syscore_ops acpi_sleep_syscore_ops = { | |
715 | .suspend = acpi_save_bm_rld, | |
716 | .resume = acpi_restore_bm_rld, | |
717 | }; | |
718 | ||
719 | void acpi_sleep_syscore_init(void) | |
720 | { | |
721 | register_syscore_ops(&acpi_sleep_syscore_ops); | |
722 | } | |
723 | #else | |
724 | static inline void acpi_sleep_syscore_init(void) {} | |
725 | #endif /* CONFIG_PM_SLEEP */ | |
726 | ||
b0cb1a19 | 727 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
728 | static unsigned long s4_hardware_signature; |
729 | static struct acpi_table_facs *facs; | |
730 | static bool nosigcheck; | |
731 | ||
732 | void __init acpi_no_s4_hw_signature(void) | |
733 | { | |
734 | nosigcheck = true; | |
735 | } | |
736 | ||
caea99ef | 737 | static int acpi_hibernation_begin(void) |
74f270af | 738 | { |
3f4b0ef7 RW |
739 | int error; |
740 | ||
72ad5d77 | 741 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
ad07277e RW |
742 | if (!error) |
743 | acpi_pm_start(ACPI_STATE_S4); | |
3f4b0ef7 RW |
744 | |
745 | return error; | |
746 | } | |
747 | ||
a3d25c27 RW |
748 | static int acpi_hibernation_enter(void) |
749 | { | |
750 | acpi_status status = AE_OK; | |
a3d25c27 RW |
751 | |
752 | ACPI_FLUSH_CPU_CACHE(); | |
753 | ||
a3d25c27 | 754 | /* This shouldn't return. If it returns, we have a problem */ |
3f6f49c7 LB |
755 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
756 | /* Reprogram control registers */ | |
757 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
758 | |
759 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
760 | } | |
761 | ||
c7e0831d RW |
762 | static void acpi_hibernation_leave(void) |
763 | { | |
fbda4b38 | 764 | pm_set_resume_via_firmware(); |
c7e0831d RW |
765 | /* |
766 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
767 | * enable it here. | |
768 | */ | |
769 | acpi_enable(); | |
3f6f49c7 LB |
770 | /* Reprogram control registers */ |
771 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c | 772 | /* Check the hardware signature */ |
5c551e62 ON |
773 | if (facs && s4_hardware_signature != facs->hardware_signature) |
774 | pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n"); | |
3f4b0ef7 | 775 | /* Restore the NVS memory area */ |
dd4c4f17 | 776 | suspend_nvs_restore(); |
d5a64513 | 777 | /* Allow EC transactions to happen. */ |
c2b46d67 | 778 | acpi_ec_unblock_transactions(); |
c7e0831d RW |
779 | } |
780 | ||
d5a64513 | 781 | static void acpi_pm_thaw(void) |
f6bb13aa | 782 | { |
fe955682 | 783 | acpi_ec_unblock_transactions(); |
3d97e426 | 784 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
785 | } |
786 | ||
073ef1f6 | 787 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
788 | .begin = acpi_hibernation_begin, |
789 | .end = acpi_pm_end, | |
c5f7a1bb | 790 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 791 | .finish = acpi_pm_finish, |
d8f3de0d RW |
792 | .prepare = acpi_pm_prepare, |
793 | .enter = acpi_hibernation_enter, | |
794 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
795 | .pre_restore = acpi_pm_freeze, |
796 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 797 | }; |
caea99ef | 798 | |
d8f3de0d RW |
799 | /** |
800 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
801 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
802 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
803 | * requested. | |
804 | */ | |
805 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 806 | { |
e49f711c ZY |
807 | int error; |
808 | /* | |
809 | * The _TTS object should always be evaluated before the _PTS object. | |
810 | * When the old_suspended_ordering is true, the _PTS object is | |
811 | * evaluated in the acpi_sleep_prepare. | |
812 | */ | |
813 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
814 | ||
815 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 816 | |
3f4b0ef7 | 817 | if (!error) { |
72ad5d77 | 818 | if (!nvs_nosave) |
dd4c4f17 | 819 | error = suspend_nvs_alloc(); |
ad07277e | 820 | if (!error) { |
3f4b0ef7 | 821 | acpi_target_sleep_state = ACPI_STATE_S4; |
ad07277e RW |
822 | acpi_scan_lock_acquire(); |
823 | } | |
3f4b0ef7 RW |
824 | } |
825 | return error; | |
826 | } | |
827 | ||
d8f3de0d RW |
828 | /* |
829 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
830 | * been requested. | |
831 | */ | |
073ef1f6 | 832 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
833 | .begin = acpi_hibernation_begin_old, |
834 | .end = acpi_pm_end, | |
c5f7a1bb | 835 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 836 | .prepare = acpi_pm_freeze, |
2a6b6976 | 837 | .finish = acpi_pm_finish, |
a3d25c27 | 838 | .enter = acpi_hibernation_enter, |
c7e0831d | 839 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
840 | .pre_restore = acpi_pm_freeze, |
841 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 842 | .recover = acpi_pm_finish, |
a3d25c27 | 843 | }; |
02040f0b RW |
844 | |
845 | static void acpi_sleep_hibernate_setup(void) | |
846 | { | |
a4e90bed | 847 | if (!acpi_sleep_state_supported(ACPI_STATE_S4)) |
02040f0b RW |
848 | return; |
849 | ||
850 | hibernation_set_ops(old_suspend_ordering ? | |
851 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
852 | sleep_states[ACPI_STATE_S4] = 1; | |
02040f0b RW |
853 | if (nosigcheck) |
854 | return; | |
855 | ||
856 | acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); | |
857 | if (facs) | |
858 | s4_hardware_signature = facs->hardware_signature; | |
859 | } | |
860 | #else /* !CONFIG_HIBERNATION */ | |
861 | static inline void acpi_sleep_hibernate_setup(void) {} | |
862 | #endif /* !CONFIG_HIBERNATION */ | |
a3d25c27 | 863 | |
f216cc37 AS |
864 | static void acpi_power_off_prepare(void) |
865 | { | |
866 | /* Prepare to power off the system */ | |
867 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 868 | acpi_disable_all_gpes(); |
c52fa70c | 869 | acpi_os_wait_events_complete(); |
f216cc37 AS |
870 | } |
871 | ||
872 | static void acpi_power_off(void) | |
873 | { | |
874 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 875 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 876 | local_irq_disable(); |
3f6f49c7 | 877 | acpi_enter_sleep_state(ACPI_STATE_S5); |
96f15efc LB |
878 | } |
879 | ||
aafbcd16 | 880 | int __init acpi_sleep_init(void) |
1da177e4 | 881 | { |
ed4cf5b2 JP |
882 | char supported[ACPI_S_STATE_COUNT * 3 + 1]; |
883 | char *pos = supported; | |
884 | int i; | |
1da177e4 | 885 | |
0ac1b1d7 ZR |
886 | acpi_sleep_dmi_check(); |
887 | ||
5a50fe70 | 888 | sleep_states[ACPI_STATE_S0] = 1; |
5a50fe70 | 889 | |
504997cf | 890 | acpi_sleep_syscore_init(); |
02040f0b RW |
891 | acpi_sleep_suspend_setup(); |
892 | acpi_sleep_hibernate_setup(); | |
1da177e4 | 893 | |
a4e90bed | 894 | if (acpi_sleep_state_supported(ACPI_STATE_S5)) { |
f216cc37 | 895 | sleep_states[ACPI_STATE_S5] = 1; |
f216cc37 AS |
896 | pm_power_off_prepare = acpi_power_off_prepare; |
897 | pm_power_off = acpi_power_off; | |
13737181 CY |
898 | } else { |
899 | acpi_no_s5 = true; | |
f216cc37 | 900 | } |
ed4cf5b2 JP |
901 | |
902 | supported[0] = 0; | |
903 | for (i = 0; i < ACPI_S_STATE_COUNT; i++) { | |
904 | if (sleep_states[i]) | |
905 | pos += sprintf(pos, " S%d", i); | |
906 | } | |
907 | pr_info(PREFIX "(supports%s)\n", supported); | |
908 | ||
e49f711c | 909 | /* |
9713adc2 RW |
910 | * Register the tts_notifier to reboot notifier list so that the _TTS |
911 | * object can also be evaluated when the system enters S5. | |
e49f711c | 912 | */ |
9713adc2 | 913 | register_reboot_notifier(&tts_notifier); |
1da177e4 LT |
914 | return 0; |
915 | } |