Commit | Line | Data |
---|---|---|
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 | ||
2c85025c OH |
50 | static void acpi_sleep_pts_switch(u32 acpi_state) |
51 | { | |
52 | acpi_status status; | |
53 | ||
54 | status = acpi_execute_simple_method(NULL, "\\_PTS", acpi_state); | |
55 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
56 | /* | |
57 | * OS can't evaluate the _PTS object correctly. Some warning | |
58 | * message will be printed. But it won't break anything. | |
59 | */ | |
60 | printk(KERN_NOTICE "Failure in evaluating _PTS object\n"); | |
61 | } | |
62 | } | |
63 | ||
64 | static int sleep_notify_reboot(struct notifier_block *this, | |
e49f711c ZY |
65 | unsigned long code, void *x) |
66 | { | |
67 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
2c85025c OH |
68 | |
69 | acpi_sleep_pts_switch(ACPI_STATE_S5); | |
70 | ||
e49f711c ZY |
71 | return NOTIFY_DONE; |
72 | } | |
73 | ||
2c85025c OH |
74 | static struct notifier_block sleep_notifier = { |
75 | .notifier_call = sleep_notify_reboot, | |
e49f711c ZY |
76 | .next = NULL, |
77 | .priority = 0, | |
78 | }; | |
79 | ||
c9b6c8f6 | 80 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
81 | { |
82 | #ifdef CONFIG_ACPI_SLEEP | |
83 | /* do we have a wakeup address for S2 and S3? */ | |
84 | if (acpi_state == ACPI_STATE_S3) { | |
319b6ffc | 85 | if (!acpi_wakeup_address) |
2f3f2226 | 86 | return -EFAULT; |
e3e9b577 | 87 | acpi_set_waking_vector(acpi_wakeup_address); |
2f3f2226 AS |
88 | |
89 | } | |
90 | ACPI_FLUSH_CPU_CACHE(); | |
2f3f2226 | 91 | #endif |
c9b6c8f6 RW |
92 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
93 | acpi_state); | |
78f5f023 | 94 | acpi_enable_wakeup_devices(acpi_state); |
2f3f2226 AS |
95 | acpi_enter_sleep_state_prep(acpi_state); |
96 | return 0; | |
97 | } | |
98 | ||
a4e90bed RW |
99 | static bool acpi_sleep_state_supported(u8 sleep_state) |
100 | { | |
101 | acpi_status status; | |
102 | u8 type_a, type_b; | |
103 | ||
104 | status = acpi_get_sleep_type_data(sleep_state, &type_a, &type_b); | |
105 | return ACPI_SUCCESS(status) && (!acpi_gbl_reduced_hardware | |
106 | || (acpi_gbl_FADT.sleep_control.address | |
107 | && acpi_gbl_FADT.sleep_status.address)); | |
108 | } | |
109 | ||
5d1e072b | 110 | #ifdef CONFIG_ACPI_SLEEP |
091aad6a | 111 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
a6ae7594 RW |
112 | |
113 | u32 acpi_target_system_state(void) | |
114 | { | |
115 | return acpi_target_sleep_state; | |
116 | } | |
fad16dd9 | 117 | EXPORT_SYMBOL_GPL(acpi_target_system_state); |
a6ae7594 | 118 | |
a5ca7345 | 119 | static bool pwr_btn_event_pending; |
091aad6a | 120 | |
72ad5d77 RW |
121 | /* |
122 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
123 | * and to restore them during the subsequent resume. Windows does that also for | |
124 | * suspend to RAM. However, it is known that this mechanism does not work on | |
125 | * all machines, so we allow the user to disable it with the help of the | |
126 | * 'acpi_sleep=nonvs' kernel command line option. | |
127 | */ | |
128 | static bool nvs_nosave; | |
129 | ||
130 | void __init acpi_nvs_nosave(void) | |
131 | { | |
132 | nvs_nosave = true; | |
133 | } | |
134 | ||
1bad2f19 KCA |
135 | /* |
136 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
137 | * but says nothing about saving NVS during S3. Not all versions of Windows | |
138 | * save NVS on S3 suspend either, and it is clear that not all systems need | |
139 | * NVS to be saved at S3 time. To improve suspend/resume time, allow the | |
140 | * user to disable saving NVS on S3 if their system does not require it, but | |
141 | * continue to save/restore NVS for S4 as specified. | |
142 | */ | |
143 | static bool nvs_nosave_s3; | |
144 | ||
145 | void __init acpi_nvs_nosave_s3(void) | |
146 | { | |
147 | nvs_nosave_s3 = true; | |
148 | } | |
149 | ||
d8f3de0d RW |
150 | /* |
151 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
152 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
153 | * kernel command line option that causes the following variable to be set. | |
154 | */ | |
155 | static bool old_suspend_ordering; | |
156 | ||
157 | void __init acpi_old_suspend_ordering(void) | |
158 | { | |
159 | old_suspend_ordering = true; | |
160 | } | |
161 | ||
0ac1b1d7 ZR |
162 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
163 | { | |
164 | acpi_old_suspend_ordering(); | |
165 | return 0; | |
166 | } | |
167 | ||
168 | static int __init init_nvs_nosave(const struct dmi_system_id *d) | |
169 | { | |
170 | acpi_nvs_nosave(); | |
171 | return 0; | |
172 | } | |
173 | ||
3e4376ff | 174 | static struct dmi_system_id acpisleep_dmi_table[] __initdata = { |
0ac1b1d7 ZR |
175 | { |
176 | .callback = init_old_suspend_ordering, | |
177 | .ident = "Abit KN9 (nForce4 variant)", | |
178 | .matches = { | |
179 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
180 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
181 | }, | |
182 | }, | |
183 | { | |
184 | .callback = init_old_suspend_ordering, | |
185 | .ident = "HP xw4600 Workstation", | |
186 | .matches = { | |
187 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
188 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
189 | }, | |
190 | }, | |
191 | { | |
192 | .callback = init_old_suspend_ordering, | |
193 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
194 | .matches = { | |
195 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
196 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
197 | }, | |
198 | }, | |
199 | { | |
200 | .callback = init_old_suspend_ordering, | |
201 | .ident = "Panasonic CF51-2L", | |
202 | .matches = { | |
203 | DMI_MATCH(DMI_BOARD_VENDOR, | |
204 | "Matsushita Electric Industrial Co.,Ltd."), | |
205 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
206 | }, | |
207 | }, | |
208 | { | |
209 | .callback = init_nvs_nosave, | |
66f2fda9 JS |
210 | .ident = "Sony Vaio VGN-FW41E_H", |
211 | .matches = { | |
212 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
213 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"), | |
214 | }, | |
215 | }, | |
216 | { | |
217 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
218 | .ident = "Sony Vaio VGN-FW21E", |
219 | .matches = { | |
220 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
221 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
222 | }, | |
223 | }, | |
224 | { | |
225 | .callback = init_nvs_nosave, | |
469dd1c4 FV |
226 | .ident = "Sony Vaio VGN-FW21M", |
227 | .matches = { | |
228 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
229 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"), | |
230 | }, | |
231 | }, | |
232 | { | |
233 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
234 | .ident = "Sony Vaio VPCEB17FX", |
235 | .matches = { | |
236 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
237 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
238 | }, | |
239 | }, | |
240 | { | |
241 | .callback = init_nvs_nosave, | |
242 | .ident = "Sony Vaio VGN-SR11M", | |
243 | .matches = { | |
244 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
245 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
246 | }, | |
247 | }, | |
248 | { | |
249 | .callback = init_nvs_nosave, | |
250 | .ident = "Everex StepNote Series", | |
251 | .matches = { | |
252 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
253 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
254 | }, | |
255 | }, | |
256 | { | |
257 | .callback = init_nvs_nosave, | |
258 | .ident = "Sony Vaio VPCEB1Z1E", | |
259 | .matches = { | |
260 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
261 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
262 | }, | |
263 | }, | |
264 | { | |
265 | .callback = init_nvs_nosave, | |
266 | .ident = "Sony Vaio VGN-NW130D", | |
267 | .matches = { | |
268 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
269 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
270 | }, | |
271 | }, | |
272 | { | |
273 | .callback = init_nvs_nosave, | |
274 | .ident = "Sony Vaio VPCCW29FX", | |
275 | .matches = { | |
276 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
277 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
278 | }, | |
279 | }, | |
280 | { | |
281 | .callback = init_nvs_nosave, | |
282 | .ident = "Averatec AV1020-ED2", | |
283 | .matches = { | |
284 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
285 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
286 | }, | |
287 | }, | |
288 | { | |
289 | .callback = init_old_suspend_ordering, | |
290 | .ident = "Asus A8N-SLI DELUXE", | |
291 | .matches = { | |
292 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
293 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
294 | }, | |
295 | }, | |
296 | { | |
297 | .callback = init_old_suspend_ordering, | |
298 | .ident = "Asus A8N-SLI Premium", | |
299 | .matches = { | |
300 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
301 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
302 | }, | |
303 | }, | |
304 | { | |
305 | .callback = init_nvs_nosave, | |
306 | .ident = "Sony Vaio VGN-SR26GN_P", | |
307 | .matches = { | |
308 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
309 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
310 | }, | |
311 | }, | |
312 | { | |
313 | .callback = init_nvs_nosave, | |
314 | .ident = "Sony Vaio VPCEB1S1E", | |
315 | .matches = { | |
316 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
317 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), | |
318 | }, | |
319 | }, | |
320 | { | |
321 | .callback = init_nvs_nosave, | |
322 | .ident = "Sony Vaio VGN-FW520F", | |
323 | .matches = { | |
324 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
325 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
326 | }, | |
327 | }, | |
328 | { | |
329 | .callback = init_nvs_nosave, | |
330 | .ident = "Asus K54C", | |
331 | .matches = { | |
332 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
333 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
334 | }, | |
335 | }, | |
336 | { | |
337 | .callback = init_nvs_nosave, | |
338 | .ident = "Asus K54HR", | |
339 | .matches = { | |
340 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
341 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
342 | }, | |
343 | }, | |
344 | {}, | |
345 | }; | |
346 | ||
8b691c9c | 347 | static void __init acpi_sleep_dmi_check(void) |
0ac1b1d7 | 348 | { |
821d6f03 LT |
349 | int year; |
350 | ||
351 | if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year >= 2012) | |
352 | acpi_nvs_nosave_s3(); | |
353 | ||
0ac1b1d7 ZR |
354 | dmi_check_system(acpisleep_dmi_table); |
355 | } | |
356 | ||
d8f3de0d | 357 | /** |
d5a64513 | 358 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 359 | */ |
d5a64513 | 360 | static int acpi_pm_freeze(void) |
d8f3de0d | 361 | { |
3d97e426 | 362 | acpi_disable_all_gpes(); |
bd6f10a5 | 363 | acpi_os_wait_events_complete(); |
fe955682 | 364 | acpi_ec_block_transactions(); |
d8f3de0d RW |
365 | return 0; |
366 | } | |
367 | ||
c5f7a1bb RW |
368 | /** |
369 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
370 | */ | |
371 | static int acpi_pm_pre_suspend(void) | |
372 | { | |
373 | acpi_pm_freeze(); | |
26fcaf60 | 374 | return suspend_nvs_save(); |
c5f7a1bb RW |
375 | } |
376 | ||
d8f3de0d RW |
377 | /** |
378 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
379 | * | |
380 | * If necessary, set the firmware waking vector and do arch-specific | |
381 | * nastiness to get the wakeup code to the waking vector. | |
382 | */ | |
383 | static int __acpi_pm_prepare(void) | |
384 | { | |
385 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
386 | if (error) |
387 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 388 | |
d8f3de0d RW |
389 | return error; |
390 | } | |
391 | ||
392 | /** | |
393 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
394 | * state and disable the GPEs. | |
395 | */ | |
396 | static int acpi_pm_prepare(void) | |
397 | { | |
398 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 399 | if (!error) |
26fcaf60 | 400 | error = acpi_pm_pre_suspend(); |
d5a64513 | 401 | |
d8f3de0d RW |
402 | return error; |
403 | } | |
404 | ||
c10d7a13 DD |
405 | static int find_powerf_dev(struct device *dev, void *data) |
406 | { | |
407 | struct acpi_device *device = to_acpi_device(dev); | |
408 | const char *hid = acpi_device_hid(device); | |
409 | ||
410 | return !strcmp(hid, ACPI_BUTTON_HID_POWERF); | |
411 | } | |
412 | ||
d8f3de0d RW |
413 | /** |
414 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
415 | * | |
416 | * This is called after we wake back up (or if entering the sleep state | |
417 | * failed). | |
418 | */ | |
419 | static void acpi_pm_finish(void) | |
420 | { | |
c10d7a13 | 421 | struct device *pwr_btn_dev; |
d8f3de0d RW |
422 | u32 acpi_state = acpi_target_sleep_state; |
423 | ||
42de5532 | 424 | acpi_ec_unblock_transactions(); |
d551d81d | 425 | suspend_nvs_free(); |
2a6b6976 | 426 | |
d8f3de0d RW |
427 | if (acpi_state == ACPI_STATE_S0) |
428 | return; | |
1da177e4 | 429 | |
d8f3de0d RW |
430 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
431 | acpi_state); | |
78f5f023 | 432 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
433 | acpi_leave_sleep_state(acpi_state); |
434 | ||
435 | /* reset firmware waking vector */ | |
e3e9b577 | 436 | acpi_set_waking_vector(0); |
d8f3de0d RW |
437 | |
438 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c10d7a13 | 439 | |
781d737c RW |
440 | acpi_resume_power_resources(); |
441 | ||
c10d7a13 DD |
442 | /* If we were woken with the fixed power button, provide a small |
443 | * hint to userspace in the form of a wakeup event on the fixed power | |
444 | * button device (if it can be found). | |
445 | * | |
446 | * We delay the event generation til now, as the PM layer requires | |
447 | * timekeeping to be running before we generate events. */ | |
448 | if (!pwr_btn_event_pending) | |
449 | return; | |
450 | ||
451 | pwr_btn_event_pending = false; | |
452 | pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, | |
453 | find_powerf_dev); | |
454 | if (pwr_btn_dev) { | |
455 | pm_wakeup_event(pwr_btn_dev, 0); | |
456 | put_device(pwr_btn_dev); | |
457 | } | |
d8f3de0d RW |
458 | } |
459 | ||
460 | /** | |
ad07277e RW |
461 | * acpi_pm_start - Start system PM transition. |
462 | */ | |
463 | static void acpi_pm_start(u32 acpi_state) | |
464 | { | |
465 | acpi_target_sleep_state = acpi_state; | |
466 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
467 | acpi_scan_lock_acquire(); | |
468 | } | |
469 | ||
470 | /** | |
471 | * acpi_pm_end - Finish up system PM transition. | |
d8f3de0d RW |
472 | */ |
473 | static void acpi_pm_end(void) | |
474 | { | |
ad07277e | 475 | acpi_scan_lock_release(); |
d8f3de0d RW |
476 | /* |
477 | * This is necessary in case acpi_pm_finish() is not called during a | |
478 | * failing transition to a sleep state. | |
479 | */ | |
480 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 481 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 482 | } |
92daa7b5 RW |
483 | #else /* !CONFIG_ACPI_SLEEP */ |
484 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
0ac1b1d7 | 485 | static inline void acpi_sleep_dmi_check(void) {} |
5d1e072b | 486 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 487 | |
d8f3de0d | 488 | #ifdef CONFIG_SUSPEND |
1da177e4 | 489 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
490 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
491 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
492 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 493 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
494 | }; |
495 | ||
e9b3aba8 | 496 | /** |
2c6e33c3 | 497 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
498 | * associated with given @pm_state, if supported. |
499 | */ | |
2c6e33c3 | 500 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
501 | { |
502 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
ad07277e | 503 | int error; |
e9b3aba8 | 504 | |
1bad2f19 | 505 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
506 | if (error) |
507 | return error; | |
508 | ||
ad07277e RW |
509 | if (!sleep_states[acpi_state]) { |
510 | pr_err("ACPI does not support sleep state S%u\n", acpi_state); | |
511 | return -ENOSYS; | |
e9b3aba8 | 512 | } |
ef25ba04 RW |
513 | if (acpi_state > ACPI_STATE_S1) |
514 | pm_set_suspend_via_firmware(); | |
ad07277e RW |
515 | |
516 | acpi_pm_start(acpi_state); | |
517 | return 0; | |
e9b3aba8 RW |
518 | } |
519 | ||
1da177e4 | 520 | /** |
2c6e33c3 | 521 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 522 | * @pm_state: ignored |
1da177e4 | 523 | * |
50ad147a RW |
524 | * Flush caches and go to sleep. For STR we have to call arch-specific |
525 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
526 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
527 | */ | |
2c6e33c3 | 528 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
529 | { |
530 | acpi_status status = AE_OK; | |
e9b3aba8 | 531 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 532 | int error; |
1da177e4 LT |
533 | |
534 | ACPI_FLUSH_CPU_CACHE(); | |
535 | ||
bb3632c6 | 536 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true); |
e9b3aba8 RW |
537 | switch (acpi_state) { |
538 | case ACPI_STATE_S1: | |
1da177e4 | 539 | barrier(); |
3f6f49c7 | 540 | status = acpi_enter_sleep_state(acpi_state); |
1da177e4 LT |
541 | break; |
542 | ||
e9b3aba8 | 543 | case ACPI_STATE_S3: |
d6a77ead KRW |
544 | if (!acpi_suspend_lowlevel) |
545 | return -ENOSYS; | |
f1a2003e | 546 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
547 | if (error) |
548 | return error; | |
7a63f08b | 549 | pr_info(PREFIX "Low-level resume complete\n"); |
ef25ba04 | 550 | pm_set_resume_via_firmware(); |
1da177e4 | 551 | break; |
1da177e4 | 552 | } |
bb3632c6 | 553 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false); |
872d83d0 | 554 | |
b6dacf63 MG |
555 | /* This violates the spec but is required for bug compatibility. */ |
556 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 557 | |
3f6f49c7 LB |
558 | /* Reprogram control registers */ |
559 | acpi_leave_sleep_state_prep(acpi_state); | |
c95d47a8 | 560 | |
23b168d4 | 561 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
562 | * of the OSPM to clear the status bit [ implying that the |
563 | * POWER_BUTTON event should not reach userspace ] | |
c10d7a13 DD |
564 | * |
565 | * However, we do generate a small hint for userspace in the form of | |
566 | * a wakeup event. We flag this condition for now and generate the | |
567 | * event later, as we're currently too early in resume to be able to | |
568 | * generate wakeup events. | |
872d83d0 | 569 | */ |
c10d7a13 | 570 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
51468a9d | 571 | acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED; |
c10d7a13 DD |
572 | |
573 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); | |
574 | ||
575 | if (pwr_btn_status & ACPI_EVENT_FLAG_SET) { | |
576 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
577 | /* Flag for later */ | |
578 | pwr_btn_event_pending = true; | |
579 | } | |
580 | } | |
872d83d0 | 581 | |
a3627f67 SL |
582 | /* |
583 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
584 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
585 | * acpi_leave_sleep_state will reenable specific GPEs later | |
586 | */ | |
3d97e426 | 587 | acpi_disable_all_gpes(); |
d5a64513 | 588 | /* Allow EC transactions to happen. */ |
fe955682 | 589 | acpi_ec_unblock_transactions_early(); |
a3627f67 | 590 | |
2a6b6976 MG |
591 | suspend_nvs_restore(); |
592 | ||
1da177e4 LT |
593 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
594 | } | |
595 | ||
2c6e33c3 | 596 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 597 | { |
e8c9c502 | 598 | u32 acpi_state; |
eb9289eb | 599 | |
e8c9c502 JB |
600 | switch (pm_state) { |
601 | case PM_SUSPEND_ON: | |
602 | case PM_SUSPEND_STANDBY: | |
603 | case PM_SUSPEND_MEM: | |
604 | acpi_state = acpi_suspend_states[pm_state]; | |
605 | ||
606 | return sleep_states[acpi_state]; | |
607 | default: | |
608 | return 0; | |
609 | } | |
eb9289eb SL |
610 | } |
611 | ||
2f55ac07 | 612 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
613 | .valid = acpi_suspend_state_valid, |
614 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 615 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 616 | .enter = acpi_suspend_enter, |
618d7fd0 | 617 | .wake = acpi_pm_finish, |
d8f3de0d RW |
618 | .end = acpi_pm_end, |
619 | }; | |
620 | ||
621 | /** | |
622 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
623 | * state associated with given @pm_state, if supported, and | |
624 | * execute the _PTS control method. This function is used if the | |
625 | * pre-ACPI 2.0 suspend ordering has been requested. | |
626 | */ | |
627 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
628 | { | |
629 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
630 | if (!error) |
631 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 632 | |
d8f3de0d RW |
633 | return error; |
634 | } | |
635 | ||
636 | /* | |
637 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
638 | * been requested. | |
639 | */ | |
2f55ac07 | 640 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
641 | .valid = acpi_suspend_state_valid, |
642 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 643 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 644 | .enter = acpi_suspend_enter, |
618d7fd0 | 645 | .wake = acpi_pm_finish, |
d8f3de0d RW |
646 | .end = acpi_pm_end, |
647 | .recover = acpi_pm_finish, | |
1da177e4 | 648 | }; |
02040f0b | 649 | |
1f0b6386 RW |
650 | static int acpi_freeze_begin(void) |
651 | { | |
652 | acpi_scan_lock_acquire(); | |
653 | return 0; | |
654 | } | |
655 | ||
a8d46b9e RW |
656 | static int acpi_freeze_prepare(void) |
657 | { | |
7b02ccea | 658 | acpi_enable_wakeup_devices(ACPI_STATE_S0); |
a8d46b9e | 659 | acpi_enable_all_wakeup_gpes(); |
c52fa70c | 660 | acpi_os_wait_events_complete(); |
8c01275e CY |
661 | if (acpi_sci_irq_valid()) |
662 | enable_irq_wake(acpi_sci_irq); | |
a8d46b9e RW |
663 | return 0; |
664 | } | |
665 | ||
666 | static void acpi_freeze_restore(void) | |
667 | { | |
7b02ccea | 668 | acpi_disable_wakeup_devices(ACPI_STATE_S0); |
8c01275e CY |
669 | if (acpi_sci_irq_valid()) |
670 | disable_irq_wake(acpi_sci_irq); | |
a8d46b9e RW |
671 | acpi_enable_all_runtime_gpes(); |
672 | } | |
673 | ||
1f0b6386 RW |
674 | static void acpi_freeze_end(void) |
675 | { | |
676 | acpi_scan_lock_release(); | |
677 | } | |
678 | ||
679 | static const struct platform_freeze_ops acpi_freeze_ops = { | |
680 | .begin = acpi_freeze_begin, | |
a8d46b9e RW |
681 | .prepare = acpi_freeze_prepare, |
682 | .restore = acpi_freeze_restore, | |
1f0b6386 RW |
683 | .end = acpi_freeze_end, |
684 | }; | |
685 | ||
02040f0b RW |
686 | static void acpi_sleep_suspend_setup(void) |
687 | { | |
688 | int i; | |
689 | ||
a4e90bed RW |
690 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) |
691 | if (acpi_sleep_state_supported(i)) | |
02040f0b | 692 | sleep_states[i] = 1; |
02040f0b RW |
693 | |
694 | suspend_set_ops(old_suspend_ordering ? | |
695 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
1f0b6386 | 696 | freeze_set_ops(&acpi_freeze_ops); |
02040f0b | 697 | } |
1f0b6386 | 698 | |
02040f0b RW |
699 | #else /* !CONFIG_SUSPEND */ |
700 | static inline void acpi_sleep_suspend_setup(void) {} | |
701 | #endif /* !CONFIG_SUSPEND */ | |
296699de | 702 | |
504997cf SH |
703 | #ifdef CONFIG_PM_SLEEP |
704 | static u32 saved_bm_rld; | |
705 | ||
706 | static int acpi_save_bm_rld(void) | |
707 | { | |
708 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld); | |
709 | return 0; | |
710 | } | |
711 | ||
712 | static void acpi_restore_bm_rld(void) | |
713 | { | |
714 | u32 resumed_bm_rld = 0; | |
715 | ||
716 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld); | |
717 | if (resumed_bm_rld == saved_bm_rld) | |
718 | return; | |
719 | ||
720 | acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld); | |
721 | } | |
722 | ||
723 | static struct syscore_ops acpi_sleep_syscore_ops = { | |
724 | .suspend = acpi_save_bm_rld, | |
725 | .resume = acpi_restore_bm_rld, | |
726 | }; | |
727 | ||
728 | void acpi_sleep_syscore_init(void) | |
729 | { | |
730 | register_syscore_ops(&acpi_sleep_syscore_ops); | |
731 | } | |
732 | #else | |
733 | static inline void acpi_sleep_syscore_init(void) {} | |
734 | #endif /* CONFIG_PM_SLEEP */ | |
735 | ||
b0cb1a19 | 736 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
737 | static unsigned long s4_hardware_signature; |
738 | static struct acpi_table_facs *facs; | |
739 | static bool nosigcheck; | |
740 | ||
741 | void __init acpi_no_s4_hw_signature(void) | |
742 | { | |
743 | nosigcheck = true; | |
744 | } | |
745 | ||
caea99ef | 746 | static int acpi_hibernation_begin(void) |
74f270af | 747 | { |
3f4b0ef7 RW |
748 | int error; |
749 | ||
72ad5d77 | 750 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
ad07277e RW |
751 | if (!error) |
752 | acpi_pm_start(ACPI_STATE_S4); | |
3f4b0ef7 RW |
753 | |
754 | return error; | |
755 | } | |
756 | ||
a3d25c27 RW |
757 | static int acpi_hibernation_enter(void) |
758 | { | |
759 | acpi_status status = AE_OK; | |
a3d25c27 RW |
760 | |
761 | ACPI_FLUSH_CPU_CACHE(); | |
762 | ||
a3d25c27 | 763 | /* This shouldn't return. If it returns, we have a problem */ |
3f6f49c7 LB |
764 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
765 | /* Reprogram control registers */ | |
766 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
767 | |
768 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
769 | } | |
770 | ||
c7e0831d RW |
771 | static void acpi_hibernation_leave(void) |
772 | { | |
fbda4b38 | 773 | pm_set_resume_via_firmware(); |
c7e0831d RW |
774 | /* |
775 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
776 | * enable it here. | |
777 | */ | |
778 | acpi_enable(); | |
3f6f49c7 LB |
779 | /* Reprogram control registers */ |
780 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c | 781 | /* Check the hardware signature */ |
5c551e62 ON |
782 | if (facs && s4_hardware_signature != facs->hardware_signature) |
783 | pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n"); | |
3f4b0ef7 | 784 | /* Restore the NVS memory area */ |
dd4c4f17 | 785 | suspend_nvs_restore(); |
d5a64513 | 786 | /* Allow EC transactions to happen. */ |
fe955682 | 787 | acpi_ec_unblock_transactions_early(); |
c7e0831d RW |
788 | } |
789 | ||
d5a64513 | 790 | static void acpi_pm_thaw(void) |
f6bb13aa | 791 | { |
fe955682 | 792 | acpi_ec_unblock_transactions(); |
3d97e426 | 793 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
794 | } |
795 | ||
073ef1f6 | 796 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
797 | .begin = acpi_hibernation_begin, |
798 | .end = acpi_pm_end, | |
c5f7a1bb | 799 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 800 | .finish = acpi_pm_finish, |
d8f3de0d RW |
801 | .prepare = acpi_pm_prepare, |
802 | .enter = acpi_hibernation_enter, | |
803 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
804 | .pre_restore = acpi_pm_freeze, |
805 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 806 | }; |
caea99ef | 807 | |
d8f3de0d RW |
808 | /** |
809 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
810 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
811 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
812 | * requested. | |
813 | */ | |
814 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 815 | { |
e49f711c ZY |
816 | int error; |
817 | /* | |
818 | * The _TTS object should always be evaluated before the _PTS object. | |
819 | * When the old_suspended_ordering is true, the _PTS object is | |
820 | * evaluated in the acpi_sleep_prepare. | |
821 | */ | |
822 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
823 | ||
824 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 825 | |
3f4b0ef7 | 826 | if (!error) { |
72ad5d77 | 827 | if (!nvs_nosave) |
dd4c4f17 | 828 | error = suspend_nvs_alloc(); |
ad07277e | 829 | if (!error) { |
3f4b0ef7 | 830 | acpi_target_sleep_state = ACPI_STATE_S4; |
ad07277e RW |
831 | acpi_scan_lock_acquire(); |
832 | } | |
3f4b0ef7 RW |
833 | } |
834 | return error; | |
835 | } | |
836 | ||
d8f3de0d RW |
837 | /* |
838 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
839 | * been requested. | |
840 | */ | |
073ef1f6 | 841 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
842 | .begin = acpi_hibernation_begin_old, |
843 | .end = acpi_pm_end, | |
c5f7a1bb | 844 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 845 | .prepare = acpi_pm_freeze, |
2a6b6976 | 846 | .finish = acpi_pm_finish, |
a3d25c27 | 847 | .enter = acpi_hibernation_enter, |
c7e0831d | 848 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
849 | .pre_restore = acpi_pm_freeze, |
850 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 851 | .recover = acpi_pm_finish, |
a3d25c27 | 852 | }; |
02040f0b RW |
853 | |
854 | static void acpi_sleep_hibernate_setup(void) | |
855 | { | |
a4e90bed | 856 | if (!acpi_sleep_state_supported(ACPI_STATE_S4)) |
02040f0b RW |
857 | return; |
858 | ||
859 | hibernation_set_ops(old_suspend_ordering ? | |
860 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
861 | sleep_states[ACPI_STATE_S4] = 1; | |
02040f0b RW |
862 | if (nosigcheck) |
863 | return; | |
864 | ||
865 | acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); | |
866 | if (facs) | |
867 | s4_hardware_signature = facs->hardware_signature; | |
868 | } | |
869 | #else /* !CONFIG_HIBERNATION */ | |
870 | static inline void acpi_sleep_hibernate_setup(void) {} | |
871 | #endif /* !CONFIG_HIBERNATION */ | |
a3d25c27 | 872 | |
f216cc37 AS |
873 | static void acpi_power_off_prepare(void) |
874 | { | |
875 | /* Prepare to power off the system */ | |
876 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 877 | acpi_disable_all_gpes(); |
c52fa70c | 878 | acpi_os_wait_events_complete(); |
f216cc37 AS |
879 | } |
880 | ||
881 | static void acpi_power_off(void) | |
882 | { | |
883 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 884 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 885 | local_irq_disable(); |
3f6f49c7 | 886 | acpi_enter_sleep_state(ACPI_STATE_S5); |
96f15efc LB |
887 | } |
888 | ||
aafbcd16 | 889 | int __init acpi_sleep_init(void) |
1da177e4 | 890 | { |
ed4cf5b2 JP |
891 | char supported[ACPI_S_STATE_COUNT * 3 + 1]; |
892 | char *pos = supported; | |
893 | int i; | |
1da177e4 | 894 | |
0ac1b1d7 ZR |
895 | acpi_sleep_dmi_check(); |
896 | ||
5a50fe70 | 897 | sleep_states[ACPI_STATE_S0] = 1; |
5a50fe70 | 898 | |
504997cf | 899 | acpi_sleep_syscore_init(); |
02040f0b RW |
900 | acpi_sleep_suspend_setup(); |
901 | acpi_sleep_hibernate_setup(); | |
1da177e4 | 902 | |
a4e90bed | 903 | if (acpi_sleep_state_supported(ACPI_STATE_S5)) { |
f216cc37 | 904 | sleep_states[ACPI_STATE_S5] = 1; |
f216cc37 AS |
905 | pm_power_off_prepare = acpi_power_off_prepare; |
906 | pm_power_off = acpi_power_off; | |
13737181 CY |
907 | } else { |
908 | acpi_no_s5 = true; | |
f216cc37 | 909 | } |
ed4cf5b2 JP |
910 | |
911 | supported[0] = 0; | |
912 | for (i = 0; i < ACPI_S_STATE_COUNT; i++) { | |
913 | if (sleep_states[i]) | |
914 | pos += sprintf(pos, " S%d", i); | |
915 | } | |
916 | pr_info(PREFIX "(supports%s)\n", supported); | |
917 | ||
e49f711c | 918 | /* |
2c85025c OH |
919 | * Register the sleep_notifier to reboot notifier list so that the _TTS |
920 | * and _PTS object can also be evaluated when the system enters S5. | |
e49f711c | 921 | */ |
2c85025c | 922 | register_reboot_notifier(&sleep_notifier); |
1da177e4 LT |
923 | return 0; |
924 | } |