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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> | |
17 | #include <linux/suspend.h> | |
e49f711c | 18 | #include <linux/reboot.h> |
d1ee4335 | 19 | #include <linux/acpi.h> |
a2ef5c4f | 20 | #include <linux/module.h> |
f216cc37 | 21 | #include <asm/io.h> |
bb3632c6 | 22 | #include <trace/events/power.h> |
f216cc37 | 23 | |
e60cc7a6 | 24 | #include "internal.h" |
1da177e4 LT |
25 | #include "sleep.h" |
26 | ||
01eac60b | 27 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
1da177e4 | 28 | |
e49f711c ZY |
29 | static void acpi_sleep_tts_switch(u32 acpi_state) |
30 | { | |
0db98202 | 31 | acpi_status status; |
e49f711c | 32 | |
0db98202 | 33 | status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state); |
e49f711c ZY |
34 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
35 | /* | |
36 | * OS can't evaluate the _TTS object correctly. Some warning | |
37 | * message will be printed. But it won't break anything. | |
38 | */ | |
39 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); | |
40 | } | |
41 | } | |
42 | ||
43 | static int tts_notify_reboot(struct notifier_block *this, | |
44 | unsigned long code, void *x) | |
45 | { | |
46 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
47 | return NOTIFY_DONE; | |
48 | } | |
49 | ||
50 | static struct notifier_block tts_notifier = { | |
51 | .notifier_call = tts_notify_reboot, | |
52 | .next = NULL, | |
53 | .priority = 0, | |
54 | }; | |
55 | ||
c9b6c8f6 | 56 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
57 | { |
58 | #ifdef CONFIG_ACPI_SLEEP | |
59 | /* do we have a wakeup address for S2 and S3? */ | |
60 | if (acpi_state == ACPI_STATE_S3) { | |
319b6ffc | 61 | if (!acpi_wakeup_address) |
2f3f2226 | 62 | return -EFAULT; |
319b6ffc | 63 | acpi_set_firmware_waking_vector(acpi_wakeup_address); |
2f3f2226 AS |
64 | |
65 | } | |
66 | ACPI_FLUSH_CPU_CACHE(); | |
2f3f2226 | 67 | #endif |
c9b6c8f6 RW |
68 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
69 | acpi_state); | |
78f5f023 | 70 | acpi_enable_wakeup_devices(acpi_state); |
2f3f2226 AS |
71 | acpi_enter_sleep_state_prep(acpi_state); |
72 | return 0; | |
73 | } | |
74 | ||
a4e90bed RW |
75 | static bool acpi_sleep_state_supported(u8 sleep_state) |
76 | { | |
77 | acpi_status status; | |
78 | u8 type_a, type_b; | |
79 | ||
80 | status = acpi_get_sleep_type_data(sleep_state, &type_a, &type_b); | |
81 | return ACPI_SUCCESS(status) && (!acpi_gbl_reduced_hardware | |
82 | || (acpi_gbl_FADT.sleep_control.address | |
83 | && acpi_gbl_FADT.sleep_status.address)); | |
84 | } | |
85 | ||
5d1e072b | 86 | #ifdef CONFIG_ACPI_SLEEP |
091aad6a | 87 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
a6ae7594 RW |
88 | |
89 | u32 acpi_target_system_state(void) | |
90 | { | |
91 | return acpi_target_sleep_state; | |
92 | } | |
fad16dd9 | 93 | EXPORT_SYMBOL_GPL(acpi_target_system_state); |
a6ae7594 | 94 | |
a5ca7345 | 95 | static bool pwr_btn_event_pending; |
091aad6a | 96 | |
72ad5d77 RW |
97 | /* |
98 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
99 | * and to restore them during the subsequent resume. Windows does that also for | |
100 | * suspend to RAM. However, it is known that this mechanism does not work on | |
101 | * all machines, so we allow the user to disable it with the help of the | |
102 | * 'acpi_sleep=nonvs' kernel command line option. | |
103 | */ | |
104 | static bool nvs_nosave; | |
105 | ||
106 | void __init acpi_nvs_nosave(void) | |
107 | { | |
108 | nvs_nosave = true; | |
109 | } | |
110 | ||
1bad2f19 KCA |
111 | /* |
112 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
113 | * but says nothing about saving NVS during S3. Not all versions of Windows | |
114 | * save NVS on S3 suspend either, and it is clear that not all systems need | |
115 | * NVS to be saved at S3 time. To improve suspend/resume time, allow the | |
116 | * user to disable saving NVS on S3 if their system does not require it, but | |
117 | * continue to save/restore NVS for S4 as specified. | |
118 | */ | |
119 | static bool nvs_nosave_s3; | |
120 | ||
121 | void __init acpi_nvs_nosave_s3(void) | |
122 | { | |
123 | nvs_nosave_s3 = true; | |
124 | } | |
125 | ||
d8f3de0d RW |
126 | /* |
127 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
128 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
129 | * kernel command line option that causes the following variable to be set. | |
130 | */ | |
131 | static bool old_suspend_ordering; | |
132 | ||
133 | void __init acpi_old_suspend_ordering(void) | |
134 | { | |
135 | old_suspend_ordering = true; | |
136 | } | |
137 | ||
0ac1b1d7 ZR |
138 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
139 | { | |
140 | acpi_old_suspend_ordering(); | |
141 | return 0; | |
142 | } | |
143 | ||
144 | static int __init init_nvs_nosave(const struct dmi_system_id *d) | |
145 | { | |
146 | acpi_nvs_nosave(); | |
147 | return 0; | |
148 | } | |
149 | ||
3e4376ff | 150 | static struct dmi_system_id acpisleep_dmi_table[] __initdata = { |
0ac1b1d7 ZR |
151 | { |
152 | .callback = init_old_suspend_ordering, | |
153 | .ident = "Abit KN9 (nForce4 variant)", | |
154 | .matches = { | |
155 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
156 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
157 | }, | |
158 | }, | |
159 | { | |
160 | .callback = init_old_suspend_ordering, | |
161 | .ident = "HP xw4600 Workstation", | |
162 | .matches = { | |
163 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
164 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
165 | }, | |
166 | }, | |
167 | { | |
168 | .callback = init_old_suspend_ordering, | |
169 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
170 | .matches = { | |
171 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
172 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
173 | }, | |
174 | }, | |
175 | { | |
176 | .callback = init_old_suspend_ordering, | |
177 | .ident = "Panasonic CF51-2L", | |
178 | .matches = { | |
179 | DMI_MATCH(DMI_BOARD_VENDOR, | |
180 | "Matsushita Electric Industrial Co.,Ltd."), | |
181 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
182 | }, | |
183 | }, | |
184 | { | |
185 | .callback = init_nvs_nosave, | |
66f2fda9 JS |
186 | .ident = "Sony Vaio VGN-FW41E_H", |
187 | .matches = { | |
188 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
189 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"), | |
190 | }, | |
191 | }, | |
192 | { | |
193 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
194 | .ident = "Sony Vaio VGN-FW21E", |
195 | .matches = { | |
196 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
197 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
198 | }, | |
199 | }, | |
200 | { | |
201 | .callback = init_nvs_nosave, | |
469dd1c4 FV |
202 | .ident = "Sony Vaio VGN-FW21M", |
203 | .matches = { | |
204 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
205 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"), | |
206 | }, | |
207 | }, | |
208 | { | |
209 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
210 | .ident = "Sony Vaio VPCEB17FX", |
211 | .matches = { | |
212 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
213 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
214 | }, | |
215 | }, | |
216 | { | |
217 | .callback = init_nvs_nosave, | |
218 | .ident = "Sony Vaio VGN-SR11M", | |
219 | .matches = { | |
220 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
221 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
222 | }, | |
223 | }, | |
224 | { | |
225 | .callback = init_nvs_nosave, | |
226 | .ident = "Everex StepNote Series", | |
227 | .matches = { | |
228 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
229 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
230 | }, | |
231 | }, | |
232 | { | |
233 | .callback = init_nvs_nosave, | |
234 | .ident = "Sony Vaio VPCEB1Z1E", | |
235 | .matches = { | |
236 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
237 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
238 | }, | |
239 | }, | |
240 | { | |
241 | .callback = init_nvs_nosave, | |
242 | .ident = "Sony Vaio VGN-NW130D", | |
243 | .matches = { | |
244 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
245 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
246 | }, | |
247 | }, | |
248 | { | |
249 | .callback = init_nvs_nosave, | |
250 | .ident = "Sony Vaio VPCCW29FX", | |
251 | .matches = { | |
252 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
253 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
254 | }, | |
255 | }, | |
256 | { | |
257 | .callback = init_nvs_nosave, | |
258 | .ident = "Averatec AV1020-ED2", | |
259 | .matches = { | |
260 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
261 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
262 | }, | |
263 | }, | |
264 | { | |
265 | .callback = init_old_suspend_ordering, | |
266 | .ident = "Asus A8N-SLI DELUXE", | |
267 | .matches = { | |
268 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
269 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
270 | }, | |
271 | }, | |
272 | { | |
273 | .callback = init_old_suspend_ordering, | |
274 | .ident = "Asus A8N-SLI Premium", | |
275 | .matches = { | |
276 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
277 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
278 | }, | |
279 | }, | |
280 | { | |
281 | .callback = init_nvs_nosave, | |
282 | .ident = "Sony Vaio VGN-SR26GN_P", | |
283 | .matches = { | |
284 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
285 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
286 | }, | |
287 | }, | |
288 | { | |
289 | .callback = init_nvs_nosave, | |
290 | .ident = "Sony Vaio VPCEB1S1E", | |
291 | .matches = { | |
292 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
293 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), | |
294 | }, | |
295 | }, | |
296 | { | |
297 | .callback = init_nvs_nosave, | |
298 | .ident = "Sony Vaio VGN-FW520F", | |
299 | .matches = { | |
300 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
301 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
302 | }, | |
303 | }, | |
304 | { | |
305 | .callback = init_nvs_nosave, | |
306 | .ident = "Asus K54C", | |
307 | .matches = { | |
308 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
309 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
310 | }, | |
311 | }, | |
312 | { | |
313 | .callback = init_nvs_nosave, | |
314 | .ident = "Asus K54HR", | |
315 | .matches = { | |
316 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
317 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
318 | }, | |
319 | }, | |
320 | {}, | |
321 | }; | |
322 | ||
323 | static void acpi_sleep_dmi_check(void) | |
324 | { | |
821d6f03 LT |
325 | int year; |
326 | ||
327 | if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year >= 2012) | |
328 | acpi_nvs_nosave_s3(); | |
329 | ||
0ac1b1d7 ZR |
330 | dmi_check_system(acpisleep_dmi_table); |
331 | } | |
332 | ||
d8f3de0d | 333 | /** |
d5a64513 | 334 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 335 | */ |
d5a64513 | 336 | static int acpi_pm_freeze(void) |
d8f3de0d | 337 | { |
3d97e426 | 338 | acpi_disable_all_gpes(); |
bd6f10a5 | 339 | acpi_os_wait_events_complete(); |
fe955682 | 340 | acpi_ec_block_transactions(); |
d8f3de0d RW |
341 | return 0; |
342 | } | |
343 | ||
c5f7a1bb RW |
344 | /** |
345 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
346 | */ | |
347 | static int acpi_pm_pre_suspend(void) | |
348 | { | |
349 | acpi_pm_freeze(); | |
26fcaf60 | 350 | return suspend_nvs_save(); |
c5f7a1bb RW |
351 | } |
352 | ||
d8f3de0d RW |
353 | /** |
354 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
355 | * | |
356 | * If necessary, set the firmware waking vector and do arch-specific | |
357 | * nastiness to get the wakeup code to the waking vector. | |
358 | */ | |
359 | static int __acpi_pm_prepare(void) | |
360 | { | |
361 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
362 | if (error) |
363 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 364 | |
d8f3de0d RW |
365 | return error; |
366 | } | |
367 | ||
368 | /** | |
369 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
370 | * state and disable the GPEs. | |
371 | */ | |
372 | static int acpi_pm_prepare(void) | |
373 | { | |
374 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 375 | if (!error) |
26fcaf60 | 376 | error = acpi_pm_pre_suspend(); |
d5a64513 | 377 | |
d8f3de0d RW |
378 | return error; |
379 | } | |
380 | ||
c10d7a13 DD |
381 | static int find_powerf_dev(struct device *dev, void *data) |
382 | { | |
383 | struct acpi_device *device = to_acpi_device(dev); | |
384 | const char *hid = acpi_device_hid(device); | |
385 | ||
386 | return !strcmp(hid, ACPI_BUTTON_HID_POWERF); | |
387 | } | |
388 | ||
d8f3de0d RW |
389 | /** |
390 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
391 | * | |
392 | * This is called after we wake back up (or if entering the sleep state | |
393 | * failed). | |
394 | */ | |
395 | static void acpi_pm_finish(void) | |
396 | { | |
c10d7a13 | 397 | struct device *pwr_btn_dev; |
d8f3de0d RW |
398 | u32 acpi_state = acpi_target_sleep_state; |
399 | ||
42de5532 | 400 | acpi_ec_unblock_transactions(); |
d551d81d | 401 | suspend_nvs_free(); |
2a6b6976 | 402 | |
d8f3de0d RW |
403 | if (acpi_state == ACPI_STATE_S0) |
404 | return; | |
1da177e4 | 405 | |
d8f3de0d RW |
406 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
407 | acpi_state); | |
78f5f023 | 408 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
409 | acpi_leave_sleep_state(acpi_state); |
410 | ||
411 | /* reset firmware waking vector */ | |
412 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
413 | ||
414 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c10d7a13 | 415 | |
781d737c RW |
416 | acpi_resume_power_resources(); |
417 | ||
c10d7a13 DD |
418 | /* If we were woken with the fixed power button, provide a small |
419 | * hint to userspace in the form of a wakeup event on the fixed power | |
420 | * button device (if it can be found). | |
421 | * | |
422 | * We delay the event generation til now, as the PM layer requires | |
423 | * timekeeping to be running before we generate events. */ | |
424 | if (!pwr_btn_event_pending) | |
425 | return; | |
426 | ||
427 | pwr_btn_event_pending = false; | |
428 | pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, | |
429 | find_powerf_dev); | |
430 | if (pwr_btn_dev) { | |
431 | pm_wakeup_event(pwr_btn_dev, 0); | |
432 | put_device(pwr_btn_dev); | |
433 | } | |
d8f3de0d RW |
434 | } |
435 | ||
436 | /** | |
ad07277e RW |
437 | * acpi_pm_start - Start system PM transition. |
438 | */ | |
439 | static void acpi_pm_start(u32 acpi_state) | |
440 | { | |
441 | acpi_target_sleep_state = acpi_state; | |
442 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
443 | acpi_scan_lock_acquire(); | |
444 | } | |
445 | ||
446 | /** | |
447 | * acpi_pm_end - Finish up system PM transition. | |
d8f3de0d RW |
448 | */ |
449 | static void acpi_pm_end(void) | |
450 | { | |
ad07277e | 451 | acpi_scan_lock_release(); |
d8f3de0d RW |
452 | /* |
453 | * This is necessary in case acpi_pm_finish() is not called during a | |
454 | * failing transition to a sleep state. | |
455 | */ | |
456 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 457 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 458 | } |
92daa7b5 RW |
459 | #else /* !CONFIG_ACPI_SLEEP */ |
460 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
0ac1b1d7 | 461 | static inline void acpi_sleep_dmi_check(void) {} |
5d1e072b | 462 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 463 | |
d8f3de0d | 464 | #ifdef CONFIG_SUSPEND |
1da177e4 | 465 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
466 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
467 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
468 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 469 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
470 | }; |
471 | ||
e9b3aba8 | 472 | /** |
2c6e33c3 | 473 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
474 | * associated with given @pm_state, if supported. |
475 | */ | |
2c6e33c3 | 476 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
477 | { |
478 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
ad07277e | 479 | int error; |
e9b3aba8 | 480 | |
1bad2f19 | 481 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
482 | if (error) |
483 | return error; | |
484 | ||
ad07277e RW |
485 | if (!sleep_states[acpi_state]) { |
486 | pr_err("ACPI does not support sleep state S%u\n", acpi_state); | |
487 | return -ENOSYS; | |
e9b3aba8 | 488 | } |
ad07277e RW |
489 | |
490 | acpi_pm_start(acpi_state); | |
491 | return 0; | |
e9b3aba8 RW |
492 | } |
493 | ||
1da177e4 | 494 | /** |
2c6e33c3 | 495 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 496 | * @pm_state: ignored |
1da177e4 | 497 | * |
50ad147a RW |
498 | * Flush caches and go to sleep. For STR we have to call arch-specific |
499 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
500 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
501 | */ | |
2c6e33c3 | 502 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
503 | { |
504 | acpi_status status = AE_OK; | |
e9b3aba8 | 505 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 506 | int error; |
1da177e4 LT |
507 | |
508 | ACPI_FLUSH_CPU_CACHE(); | |
509 | ||
bb3632c6 | 510 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true); |
e9b3aba8 RW |
511 | switch (acpi_state) { |
512 | case ACPI_STATE_S1: | |
1da177e4 | 513 | barrier(); |
3f6f49c7 | 514 | status = acpi_enter_sleep_state(acpi_state); |
1da177e4 LT |
515 | break; |
516 | ||
e9b3aba8 | 517 | case ACPI_STATE_S3: |
d6a77ead KRW |
518 | if (!acpi_suspend_lowlevel) |
519 | return -ENOSYS; | |
f1a2003e | 520 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
521 | if (error) |
522 | return error; | |
7a63f08b | 523 | pr_info(PREFIX "Low-level resume complete\n"); |
1da177e4 | 524 | break; |
1da177e4 | 525 | } |
bb3632c6 | 526 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false); |
872d83d0 | 527 | |
b6dacf63 MG |
528 | /* This violates the spec but is required for bug compatibility. */ |
529 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 530 | |
3f6f49c7 LB |
531 | /* Reprogram control registers */ |
532 | acpi_leave_sleep_state_prep(acpi_state); | |
c95d47a8 | 533 | |
23b168d4 | 534 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
535 | * of the OSPM to clear the status bit [ implying that the |
536 | * POWER_BUTTON event should not reach userspace ] | |
c10d7a13 DD |
537 | * |
538 | * However, we do generate a small hint for userspace in the form of | |
539 | * a wakeup event. We flag this condition for now and generate the | |
540 | * event later, as we're currently too early in resume to be able to | |
541 | * generate wakeup events. | |
872d83d0 | 542 | */ |
c10d7a13 | 543 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
51468a9d | 544 | acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED; |
c10d7a13 DD |
545 | |
546 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); | |
547 | ||
548 | if (pwr_btn_status & ACPI_EVENT_FLAG_SET) { | |
549 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
550 | /* Flag for later */ | |
551 | pwr_btn_event_pending = true; | |
552 | } | |
553 | } | |
872d83d0 | 554 | |
a3627f67 SL |
555 | /* |
556 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
557 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
558 | * acpi_leave_sleep_state will reenable specific GPEs later | |
559 | */ | |
3d97e426 | 560 | acpi_disable_all_gpes(); |
d5a64513 | 561 | /* Allow EC transactions to happen. */ |
fe955682 | 562 | acpi_ec_unblock_transactions_early(); |
a3627f67 | 563 | |
2a6b6976 MG |
564 | suspend_nvs_restore(); |
565 | ||
1da177e4 LT |
566 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
567 | } | |
568 | ||
2c6e33c3 | 569 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 570 | { |
e8c9c502 | 571 | u32 acpi_state; |
eb9289eb | 572 | |
e8c9c502 JB |
573 | switch (pm_state) { |
574 | case PM_SUSPEND_ON: | |
575 | case PM_SUSPEND_STANDBY: | |
576 | case PM_SUSPEND_MEM: | |
577 | acpi_state = acpi_suspend_states[pm_state]; | |
578 | ||
579 | return sleep_states[acpi_state]; | |
580 | default: | |
581 | return 0; | |
582 | } | |
eb9289eb SL |
583 | } |
584 | ||
2f55ac07 | 585 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
586 | .valid = acpi_suspend_state_valid, |
587 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 588 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 589 | .enter = acpi_suspend_enter, |
618d7fd0 | 590 | .wake = acpi_pm_finish, |
d8f3de0d RW |
591 | .end = acpi_pm_end, |
592 | }; | |
593 | ||
594 | /** | |
595 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
596 | * state associated with given @pm_state, if supported, and | |
597 | * execute the _PTS control method. This function is used if the | |
598 | * pre-ACPI 2.0 suspend ordering has been requested. | |
599 | */ | |
600 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
601 | { | |
602 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
603 | if (!error) |
604 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 605 | |
d8f3de0d RW |
606 | return error; |
607 | } | |
608 | ||
609 | /* | |
610 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
611 | * been requested. | |
612 | */ | |
2f55ac07 | 613 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
614 | .valid = acpi_suspend_state_valid, |
615 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 616 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 617 | .enter = acpi_suspend_enter, |
618d7fd0 | 618 | .wake = acpi_pm_finish, |
d8f3de0d RW |
619 | .end = acpi_pm_end, |
620 | .recover = acpi_pm_finish, | |
1da177e4 | 621 | }; |
02040f0b | 622 | |
1f0b6386 RW |
623 | static int acpi_freeze_begin(void) |
624 | { | |
625 | acpi_scan_lock_acquire(); | |
626 | return 0; | |
627 | } | |
628 | ||
629 | static void acpi_freeze_end(void) | |
630 | { | |
631 | acpi_scan_lock_release(); | |
632 | } | |
633 | ||
634 | static const struct platform_freeze_ops acpi_freeze_ops = { | |
635 | .begin = acpi_freeze_begin, | |
636 | .end = acpi_freeze_end, | |
637 | }; | |
638 | ||
02040f0b RW |
639 | static void acpi_sleep_suspend_setup(void) |
640 | { | |
641 | int i; | |
642 | ||
a4e90bed RW |
643 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) |
644 | if (acpi_sleep_state_supported(i)) | |
02040f0b | 645 | sleep_states[i] = 1; |
02040f0b RW |
646 | |
647 | suspend_set_ops(old_suspend_ordering ? | |
648 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
1f0b6386 | 649 | freeze_set_ops(&acpi_freeze_ops); |
02040f0b | 650 | } |
1f0b6386 | 651 | |
02040f0b RW |
652 | #else /* !CONFIG_SUSPEND */ |
653 | static inline void acpi_sleep_suspend_setup(void) {} | |
654 | #endif /* !CONFIG_SUSPEND */ | |
296699de | 655 | |
b0cb1a19 | 656 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
657 | static unsigned long s4_hardware_signature; |
658 | static struct acpi_table_facs *facs; | |
659 | static bool nosigcheck; | |
660 | ||
661 | void __init acpi_no_s4_hw_signature(void) | |
662 | { | |
663 | nosigcheck = true; | |
664 | } | |
665 | ||
caea99ef | 666 | static int acpi_hibernation_begin(void) |
74f270af | 667 | { |
3f4b0ef7 RW |
668 | int error; |
669 | ||
72ad5d77 | 670 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
ad07277e RW |
671 | if (!error) |
672 | acpi_pm_start(ACPI_STATE_S4); | |
3f4b0ef7 RW |
673 | |
674 | return error; | |
675 | } | |
676 | ||
a3d25c27 RW |
677 | static int acpi_hibernation_enter(void) |
678 | { | |
679 | acpi_status status = AE_OK; | |
a3d25c27 RW |
680 | |
681 | ACPI_FLUSH_CPU_CACHE(); | |
682 | ||
a3d25c27 | 683 | /* This shouldn't return. If it returns, we have a problem */ |
3f6f49c7 LB |
684 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
685 | /* Reprogram control registers */ | |
686 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
687 | |
688 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
689 | } | |
690 | ||
c7e0831d RW |
691 | static void acpi_hibernation_leave(void) |
692 | { | |
693 | /* | |
694 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
695 | * enable it here. | |
696 | */ | |
697 | acpi_enable(); | |
3f6f49c7 LB |
698 | /* Reprogram control registers */ |
699 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c | 700 | /* Check the hardware signature */ |
5c551e62 ON |
701 | if (facs && s4_hardware_signature != facs->hardware_signature) |
702 | pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n"); | |
3f4b0ef7 | 703 | /* Restore the NVS memory area */ |
dd4c4f17 | 704 | suspend_nvs_restore(); |
d5a64513 | 705 | /* Allow EC transactions to happen. */ |
fe955682 | 706 | acpi_ec_unblock_transactions_early(); |
c7e0831d RW |
707 | } |
708 | ||
d5a64513 | 709 | static void acpi_pm_thaw(void) |
f6bb13aa | 710 | { |
fe955682 | 711 | acpi_ec_unblock_transactions(); |
3d97e426 | 712 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
713 | } |
714 | ||
073ef1f6 | 715 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
716 | .begin = acpi_hibernation_begin, |
717 | .end = acpi_pm_end, | |
c5f7a1bb | 718 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 719 | .finish = acpi_pm_finish, |
d8f3de0d RW |
720 | .prepare = acpi_pm_prepare, |
721 | .enter = acpi_hibernation_enter, | |
722 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
723 | .pre_restore = acpi_pm_freeze, |
724 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 725 | }; |
caea99ef | 726 | |
d8f3de0d RW |
727 | /** |
728 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
729 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
730 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
731 | * requested. | |
732 | */ | |
733 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 734 | { |
e49f711c ZY |
735 | int error; |
736 | /* | |
737 | * The _TTS object should always be evaluated before the _PTS object. | |
738 | * When the old_suspended_ordering is true, the _PTS object is | |
739 | * evaluated in the acpi_sleep_prepare. | |
740 | */ | |
741 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
742 | ||
743 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 744 | |
3f4b0ef7 | 745 | if (!error) { |
72ad5d77 | 746 | if (!nvs_nosave) |
dd4c4f17 | 747 | error = suspend_nvs_alloc(); |
ad07277e | 748 | if (!error) { |
3f4b0ef7 | 749 | acpi_target_sleep_state = ACPI_STATE_S4; |
ad07277e RW |
750 | acpi_scan_lock_acquire(); |
751 | } | |
3f4b0ef7 RW |
752 | } |
753 | return error; | |
754 | } | |
755 | ||
d8f3de0d RW |
756 | /* |
757 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
758 | * been requested. | |
759 | */ | |
073ef1f6 | 760 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
761 | .begin = acpi_hibernation_begin_old, |
762 | .end = acpi_pm_end, | |
c5f7a1bb | 763 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 764 | .prepare = acpi_pm_freeze, |
2a6b6976 | 765 | .finish = acpi_pm_finish, |
a3d25c27 | 766 | .enter = acpi_hibernation_enter, |
c7e0831d | 767 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
768 | .pre_restore = acpi_pm_freeze, |
769 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 770 | .recover = acpi_pm_finish, |
a3d25c27 | 771 | }; |
02040f0b RW |
772 | |
773 | static void acpi_sleep_hibernate_setup(void) | |
774 | { | |
a4e90bed | 775 | if (!acpi_sleep_state_supported(ACPI_STATE_S4)) |
02040f0b RW |
776 | return; |
777 | ||
778 | hibernation_set_ops(old_suspend_ordering ? | |
779 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
780 | sleep_states[ACPI_STATE_S4] = 1; | |
02040f0b RW |
781 | if (nosigcheck) |
782 | return; | |
783 | ||
784 | acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); | |
785 | if (facs) | |
786 | s4_hardware_signature = facs->hardware_signature; | |
787 | } | |
788 | #else /* !CONFIG_HIBERNATION */ | |
789 | static inline void acpi_sleep_hibernate_setup(void) {} | |
790 | #endif /* !CONFIG_HIBERNATION */ | |
a3d25c27 | 791 | |
296699de RW |
792 | int acpi_suspend(u32 acpi_state) |
793 | { | |
794 | suspend_state_t states[] = { | |
795 | [1] = PM_SUSPEND_STANDBY, | |
796 | [3] = PM_SUSPEND_MEM, | |
797 | [5] = PM_SUSPEND_MAX | |
798 | }; | |
799 | ||
800 | if (acpi_state < 6 && states[acpi_state]) | |
801 | return pm_suspend(states[acpi_state]); | |
802 | if (acpi_state == 4) | |
803 | return hibernate(); | |
804 | return -EINVAL; | |
805 | } | |
806 | ||
f216cc37 AS |
807 | static void acpi_power_off_prepare(void) |
808 | { | |
809 | /* Prepare to power off the system */ | |
810 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 811 | acpi_disable_all_gpes(); |
f216cc37 AS |
812 | } |
813 | ||
814 | static void acpi_power_off(void) | |
815 | { | |
816 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 817 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 818 | local_irq_disable(); |
3f6f49c7 | 819 | acpi_enter_sleep_state(ACPI_STATE_S5); |
96f15efc LB |
820 | } |
821 | ||
aafbcd16 | 822 | int __init acpi_sleep_init(void) |
1da177e4 | 823 | { |
ed4cf5b2 JP |
824 | char supported[ACPI_S_STATE_COUNT * 3 + 1]; |
825 | char *pos = supported; | |
826 | int i; | |
1da177e4 | 827 | |
0ac1b1d7 ZR |
828 | acpi_sleep_dmi_check(); |
829 | ||
5a50fe70 | 830 | sleep_states[ACPI_STATE_S0] = 1; |
5a50fe70 | 831 | |
02040f0b RW |
832 | acpi_sleep_suspend_setup(); |
833 | acpi_sleep_hibernate_setup(); | |
1da177e4 | 834 | |
a4e90bed | 835 | if (acpi_sleep_state_supported(ACPI_STATE_S5)) { |
f216cc37 | 836 | sleep_states[ACPI_STATE_S5] = 1; |
f216cc37 AS |
837 | pm_power_off_prepare = acpi_power_off_prepare; |
838 | pm_power_off = acpi_power_off; | |
839 | } | |
ed4cf5b2 JP |
840 | |
841 | supported[0] = 0; | |
842 | for (i = 0; i < ACPI_S_STATE_COUNT; i++) { | |
843 | if (sleep_states[i]) | |
844 | pos += sprintf(pos, " S%d", i); | |
845 | } | |
846 | pr_info(PREFIX "(supports%s)\n", supported); | |
847 | ||
e49f711c ZY |
848 | /* |
849 | * Register the tts_notifier to reboot notifier list so that the _TTS | |
850 | * object can also be evaluated when the system enters S5. | |
851 | */ | |
852 | register_reboot_notifier(&tts_notifier); | |
1da177e4 LT |
853 | return 0; |
854 | } |