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> |
f216cc37 | 22 | #include <asm/io.h> |
bb3632c6 | 23 | #include <trace/events/power.h> |
f216cc37 | 24 | |
e60cc7a6 | 25 | #include "internal.h" |
1da177e4 LT |
26 | #include "sleep.h" |
27 | ||
01eac60b | 28 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
1da177e4 | 29 | |
e49f711c ZY |
30 | static void acpi_sleep_tts_switch(u32 acpi_state) |
31 | { | |
0db98202 | 32 | acpi_status status; |
e49f711c | 33 | |
0db98202 | 34 | status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state); |
e49f711c ZY |
35 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
36 | /* | |
37 | * OS can't evaluate the _TTS object correctly. Some warning | |
38 | * message will be printed. But it won't break anything. | |
39 | */ | |
40 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); | |
41 | } | |
42 | } | |
43 | ||
44 | static int tts_notify_reboot(struct notifier_block *this, | |
45 | unsigned long code, void *x) | |
46 | { | |
47 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
48 | return NOTIFY_DONE; | |
49 | } | |
50 | ||
51 | static struct notifier_block tts_notifier = { | |
52 | .notifier_call = tts_notify_reboot, | |
53 | .next = NULL, | |
54 | .priority = 0, | |
55 | }; | |
56 | ||
c9b6c8f6 | 57 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
58 | { |
59 | #ifdef CONFIG_ACPI_SLEEP | |
60 | /* do we have a wakeup address for S2 and S3? */ | |
61 | if (acpi_state == ACPI_STATE_S3) { | |
319b6ffc | 62 | if (!acpi_wakeup_address) |
2f3f2226 | 63 | return -EFAULT; |
319b6ffc | 64 | acpi_set_firmware_waking_vector(acpi_wakeup_address); |
2f3f2226 AS |
65 | |
66 | } | |
67 | ACPI_FLUSH_CPU_CACHE(); | |
2f3f2226 | 68 | #endif |
c9b6c8f6 RW |
69 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
70 | acpi_state); | |
78f5f023 | 71 | acpi_enable_wakeup_devices(acpi_state); |
2f3f2226 AS |
72 | acpi_enter_sleep_state_prep(acpi_state); |
73 | return 0; | |
74 | } | |
75 | ||
a4e90bed RW |
76 | static bool acpi_sleep_state_supported(u8 sleep_state) |
77 | { | |
78 | acpi_status status; | |
79 | u8 type_a, type_b; | |
80 | ||
81 | status = acpi_get_sleep_type_data(sleep_state, &type_a, &type_b); | |
82 | return ACPI_SUCCESS(status) && (!acpi_gbl_reduced_hardware | |
83 | || (acpi_gbl_FADT.sleep_control.address | |
84 | && acpi_gbl_FADT.sleep_status.address)); | |
85 | } | |
86 | ||
5d1e072b | 87 | #ifdef CONFIG_ACPI_SLEEP |
091aad6a | 88 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
a6ae7594 RW |
89 | |
90 | u32 acpi_target_system_state(void) | |
91 | { | |
92 | return acpi_target_sleep_state; | |
93 | } | |
fad16dd9 | 94 | EXPORT_SYMBOL_GPL(acpi_target_system_state); |
a6ae7594 | 95 | |
a5ca7345 | 96 | static bool pwr_btn_event_pending; |
091aad6a | 97 | |
72ad5d77 RW |
98 | /* |
99 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
100 | * and to restore them during the subsequent resume. Windows does that also for | |
101 | * suspend to RAM. However, it is known that this mechanism does not work on | |
102 | * all machines, so we allow the user to disable it with the help of the | |
103 | * 'acpi_sleep=nonvs' kernel command line option. | |
104 | */ | |
105 | static bool nvs_nosave; | |
106 | ||
107 | void __init acpi_nvs_nosave(void) | |
108 | { | |
109 | nvs_nosave = true; | |
110 | } | |
111 | ||
1bad2f19 KCA |
112 | /* |
113 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
114 | * but says nothing about saving NVS during S3. Not all versions of Windows | |
115 | * save NVS on S3 suspend either, and it is clear that not all systems need | |
116 | * NVS to be saved at S3 time. To improve suspend/resume time, allow the | |
117 | * user to disable saving NVS on S3 if their system does not require it, but | |
118 | * continue to save/restore NVS for S4 as specified. | |
119 | */ | |
120 | static bool nvs_nosave_s3; | |
121 | ||
122 | void __init acpi_nvs_nosave_s3(void) | |
123 | { | |
124 | nvs_nosave_s3 = true; | |
125 | } | |
126 | ||
d8f3de0d RW |
127 | /* |
128 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
129 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
130 | * kernel command line option that causes the following variable to be set. | |
131 | */ | |
132 | static bool old_suspend_ordering; | |
133 | ||
134 | void __init acpi_old_suspend_ordering(void) | |
135 | { | |
136 | old_suspend_ordering = true; | |
137 | } | |
138 | ||
0ac1b1d7 ZR |
139 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
140 | { | |
141 | acpi_old_suspend_ordering(); | |
142 | return 0; | |
143 | } | |
144 | ||
145 | static int __init init_nvs_nosave(const struct dmi_system_id *d) | |
146 | { | |
147 | acpi_nvs_nosave(); | |
148 | return 0; | |
149 | } | |
150 | ||
3e4376ff | 151 | static struct dmi_system_id acpisleep_dmi_table[] __initdata = { |
0ac1b1d7 ZR |
152 | { |
153 | .callback = init_old_suspend_ordering, | |
154 | .ident = "Abit KN9 (nForce4 variant)", | |
155 | .matches = { | |
156 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
157 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
158 | }, | |
159 | }, | |
160 | { | |
161 | .callback = init_old_suspend_ordering, | |
162 | .ident = "HP xw4600 Workstation", | |
163 | .matches = { | |
164 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
165 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
166 | }, | |
167 | }, | |
168 | { | |
169 | .callback = init_old_suspend_ordering, | |
170 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
171 | .matches = { | |
172 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
173 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
174 | }, | |
175 | }, | |
176 | { | |
177 | .callback = init_old_suspend_ordering, | |
178 | .ident = "Panasonic CF51-2L", | |
179 | .matches = { | |
180 | DMI_MATCH(DMI_BOARD_VENDOR, | |
181 | "Matsushita Electric Industrial Co.,Ltd."), | |
182 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
183 | }, | |
184 | }, | |
185 | { | |
186 | .callback = init_nvs_nosave, | |
66f2fda9 JS |
187 | .ident = "Sony Vaio VGN-FW41E_H", |
188 | .matches = { | |
189 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
190 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"), | |
191 | }, | |
192 | }, | |
193 | { | |
194 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
195 | .ident = "Sony Vaio VGN-FW21E", |
196 | .matches = { | |
197 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
198 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
199 | }, | |
200 | }, | |
201 | { | |
202 | .callback = init_nvs_nosave, | |
469dd1c4 FV |
203 | .ident = "Sony Vaio VGN-FW21M", |
204 | .matches = { | |
205 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
206 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"), | |
207 | }, | |
208 | }, | |
209 | { | |
210 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
211 | .ident = "Sony Vaio VPCEB17FX", |
212 | .matches = { | |
213 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
214 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
215 | }, | |
216 | }, | |
217 | { | |
218 | .callback = init_nvs_nosave, | |
219 | .ident = "Sony Vaio VGN-SR11M", | |
220 | .matches = { | |
221 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
222 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
223 | }, | |
224 | }, | |
225 | { | |
226 | .callback = init_nvs_nosave, | |
227 | .ident = "Everex StepNote Series", | |
228 | .matches = { | |
229 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
230 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
231 | }, | |
232 | }, | |
233 | { | |
234 | .callback = init_nvs_nosave, | |
235 | .ident = "Sony Vaio VPCEB1Z1E", | |
236 | .matches = { | |
237 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
238 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
239 | }, | |
240 | }, | |
241 | { | |
242 | .callback = init_nvs_nosave, | |
243 | .ident = "Sony Vaio VGN-NW130D", | |
244 | .matches = { | |
245 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
246 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
247 | }, | |
248 | }, | |
249 | { | |
250 | .callback = init_nvs_nosave, | |
251 | .ident = "Sony Vaio VPCCW29FX", | |
252 | .matches = { | |
253 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
254 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
255 | }, | |
256 | }, | |
257 | { | |
258 | .callback = init_nvs_nosave, | |
259 | .ident = "Averatec AV1020-ED2", | |
260 | .matches = { | |
261 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
262 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
263 | }, | |
264 | }, | |
265 | { | |
266 | .callback = init_old_suspend_ordering, | |
267 | .ident = "Asus A8N-SLI DELUXE", | |
268 | .matches = { | |
269 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
270 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
271 | }, | |
272 | }, | |
273 | { | |
274 | .callback = init_old_suspend_ordering, | |
275 | .ident = "Asus A8N-SLI Premium", | |
276 | .matches = { | |
277 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
278 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
279 | }, | |
280 | }, | |
281 | { | |
282 | .callback = init_nvs_nosave, | |
283 | .ident = "Sony Vaio VGN-SR26GN_P", | |
284 | .matches = { | |
285 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
286 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
287 | }, | |
288 | }, | |
289 | { | |
290 | .callback = init_nvs_nosave, | |
291 | .ident = "Sony Vaio VPCEB1S1E", | |
292 | .matches = { | |
293 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
294 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), | |
295 | }, | |
296 | }, | |
297 | { | |
298 | .callback = init_nvs_nosave, | |
299 | .ident = "Sony Vaio VGN-FW520F", | |
300 | .matches = { | |
301 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
302 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
303 | }, | |
304 | }, | |
305 | { | |
306 | .callback = init_nvs_nosave, | |
307 | .ident = "Asus K54C", | |
308 | .matches = { | |
309 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
310 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
311 | }, | |
312 | }, | |
313 | { | |
314 | .callback = init_nvs_nosave, | |
315 | .ident = "Asus K54HR", | |
316 | .matches = { | |
317 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
318 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
319 | }, | |
320 | }, | |
321 | {}, | |
322 | }; | |
323 | ||
8b691c9c | 324 | static void __init acpi_sleep_dmi_check(void) |
0ac1b1d7 | 325 | { |
821d6f03 LT |
326 | int year; |
327 | ||
328 | if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year >= 2012) | |
329 | acpi_nvs_nosave_s3(); | |
330 | ||
0ac1b1d7 ZR |
331 | dmi_check_system(acpisleep_dmi_table); |
332 | } | |
333 | ||
d8f3de0d | 334 | /** |
d5a64513 | 335 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 336 | */ |
d5a64513 | 337 | static int acpi_pm_freeze(void) |
d8f3de0d | 338 | { |
3d97e426 | 339 | acpi_disable_all_gpes(); |
bd6f10a5 | 340 | acpi_os_wait_events_complete(); |
fe955682 | 341 | acpi_ec_block_transactions(); |
d8f3de0d RW |
342 | return 0; |
343 | } | |
344 | ||
c5f7a1bb RW |
345 | /** |
346 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
347 | */ | |
348 | static int acpi_pm_pre_suspend(void) | |
349 | { | |
350 | acpi_pm_freeze(); | |
26fcaf60 | 351 | return suspend_nvs_save(); |
c5f7a1bb RW |
352 | } |
353 | ||
d8f3de0d RW |
354 | /** |
355 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
356 | * | |
357 | * If necessary, set the firmware waking vector and do arch-specific | |
358 | * nastiness to get the wakeup code to the waking vector. | |
359 | */ | |
360 | static int __acpi_pm_prepare(void) | |
361 | { | |
362 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
363 | if (error) |
364 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 365 | |
d8f3de0d RW |
366 | return error; |
367 | } | |
368 | ||
369 | /** | |
370 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
371 | * state and disable the GPEs. | |
372 | */ | |
373 | static int acpi_pm_prepare(void) | |
374 | { | |
375 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 376 | if (!error) |
26fcaf60 | 377 | error = acpi_pm_pre_suspend(); |
d5a64513 | 378 | |
d8f3de0d RW |
379 | return error; |
380 | } | |
381 | ||
c10d7a13 DD |
382 | static int find_powerf_dev(struct device *dev, void *data) |
383 | { | |
384 | struct acpi_device *device = to_acpi_device(dev); | |
385 | const char *hid = acpi_device_hid(device); | |
386 | ||
387 | return !strcmp(hid, ACPI_BUTTON_HID_POWERF); | |
388 | } | |
389 | ||
d8f3de0d RW |
390 | /** |
391 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
392 | * | |
393 | * This is called after we wake back up (or if entering the sleep state | |
394 | * failed). | |
395 | */ | |
396 | static void acpi_pm_finish(void) | |
397 | { | |
c10d7a13 | 398 | struct device *pwr_btn_dev; |
d8f3de0d RW |
399 | u32 acpi_state = acpi_target_sleep_state; |
400 | ||
42de5532 | 401 | acpi_ec_unblock_transactions(); |
d551d81d | 402 | suspend_nvs_free(); |
2a6b6976 | 403 | |
d8f3de0d RW |
404 | if (acpi_state == ACPI_STATE_S0) |
405 | return; | |
1da177e4 | 406 | |
d8f3de0d RW |
407 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
408 | acpi_state); | |
78f5f023 | 409 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
410 | acpi_leave_sleep_state(acpi_state); |
411 | ||
412 | /* reset firmware waking vector */ | |
413 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
414 | ||
415 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c10d7a13 | 416 | |
781d737c RW |
417 | acpi_resume_power_resources(); |
418 | ||
c10d7a13 DD |
419 | /* If we were woken with the fixed power button, provide a small |
420 | * hint to userspace in the form of a wakeup event on the fixed power | |
421 | * button device (if it can be found). | |
422 | * | |
423 | * We delay the event generation til now, as the PM layer requires | |
424 | * timekeeping to be running before we generate events. */ | |
425 | if (!pwr_btn_event_pending) | |
426 | return; | |
427 | ||
428 | pwr_btn_event_pending = false; | |
429 | pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, | |
430 | find_powerf_dev); | |
431 | if (pwr_btn_dev) { | |
432 | pm_wakeup_event(pwr_btn_dev, 0); | |
433 | put_device(pwr_btn_dev); | |
434 | } | |
d8f3de0d RW |
435 | } |
436 | ||
437 | /** | |
ad07277e RW |
438 | * acpi_pm_start - Start system PM transition. |
439 | */ | |
440 | static void acpi_pm_start(u32 acpi_state) | |
441 | { | |
442 | acpi_target_sleep_state = acpi_state; | |
443 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
444 | acpi_scan_lock_acquire(); | |
445 | } | |
446 | ||
447 | /** | |
448 | * acpi_pm_end - Finish up system PM transition. | |
d8f3de0d RW |
449 | */ |
450 | static void acpi_pm_end(void) | |
451 | { | |
ad07277e | 452 | acpi_scan_lock_release(); |
d8f3de0d RW |
453 | /* |
454 | * This is necessary in case acpi_pm_finish() is not called during a | |
455 | * failing transition to a sleep state. | |
456 | */ | |
457 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 458 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 459 | } |
92daa7b5 RW |
460 | #else /* !CONFIG_ACPI_SLEEP */ |
461 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
0ac1b1d7 | 462 | static inline void acpi_sleep_dmi_check(void) {} |
5d1e072b | 463 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 464 | |
d8f3de0d | 465 | #ifdef CONFIG_SUSPEND |
1da177e4 | 466 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
467 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
468 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
469 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 470 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
471 | }; |
472 | ||
e9b3aba8 | 473 | /** |
2c6e33c3 | 474 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
475 | * associated with given @pm_state, if supported. |
476 | */ | |
2c6e33c3 | 477 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
478 | { |
479 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
ad07277e | 480 | int error; |
e9b3aba8 | 481 | |
1bad2f19 | 482 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
483 | if (error) |
484 | return error; | |
485 | ||
ad07277e RW |
486 | if (!sleep_states[acpi_state]) { |
487 | pr_err("ACPI does not support sleep state S%u\n", acpi_state); | |
488 | return -ENOSYS; | |
e9b3aba8 | 489 | } |
ef25ba04 RW |
490 | if (acpi_state > ACPI_STATE_S1) |
491 | pm_set_suspend_via_firmware(); | |
ad07277e RW |
492 | |
493 | acpi_pm_start(acpi_state); | |
494 | return 0; | |
e9b3aba8 RW |
495 | } |
496 | ||
1da177e4 | 497 | /** |
2c6e33c3 | 498 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 499 | * @pm_state: ignored |
1da177e4 | 500 | * |
50ad147a RW |
501 | * Flush caches and go to sleep. For STR we have to call arch-specific |
502 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
503 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
504 | */ | |
2c6e33c3 | 505 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
506 | { |
507 | acpi_status status = AE_OK; | |
e9b3aba8 | 508 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 509 | int error; |
1da177e4 LT |
510 | |
511 | ACPI_FLUSH_CPU_CACHE(); | |
512 | ||
bb3632c6 | 513 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true); |
e9b3aba8 RW |
514 | switch (acpi_state) { |
515 | case ACPI_STATE_S1: | |
1da177e4 | 516 | barrier(); |
3f6f49c7 | 517 | status = acpi_enter_sleep_state(acpi_state); |
1da177e4 LT |
518 | break; |
519 | ||
e9b3aba8 | 520 | case ACPI_STATE_S3: |
d6a77ead KRW |
521 | if (!acpi_suspend_lowlevel) |
522 | return -ENOSYS; | |
f1a2003e | 523 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
524 | if (error) |
525 | return error; | |
7a63f08b | 526 | pr_info(PREFIX "Low-level resume complete\n"); |
ef25ba04 | 527 | pm_set_resume_via_firmware(); |
1da177e4 | 528 | break; |
1da177e4 | 529 | } |
bb3632c6 | 530 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false); |
872d83d0 | 531 | |
b6dacf63 MG |
532 | /* This violates the spec but is required for bug compatibility. */ |
533 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 534 | |
3f6f49c7 LB |
535 | /* Reprogram control registers */ |
536 | acpi_leave_sleep_state_prep(acpi_state); | |
c95d47a8 | 537 | |
23b168d4 | 538 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
539 | * of the OSPM to clear the status bit [ implying that the |
540 | * POWER_BUTTON event should not reach userspace ] | |
c10d7a13 DD |
541 | * |
542 | * However, we do generate a small hint for userspace in the form of | |
543 | * a wakeup event. We flag this condition for now and generate the | |
544 | * event later, as we're currently too early in resume to be able to | |
545 | * generate wakeup events. | |
872d83d0 | 546 | */ |
c10d7a13 | 547 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
51468a9d | 548 | acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED; |
c10d7a13 DD |
549 | |
550 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); | |
551 | ||
552 | if (pwr_btn_status & ACPI_EVENT_FLAG_SET) { | |
553 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
554 | /* Flag for later */ | |
555 | pwr_btn_event_pending = true; | |
556 | } | |
557 | } | |
872d83d0 | 558 | |
a3627f67 SL |
559 | /* |
560 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
561 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
562 | * acpi_leave_sleep_state will reenable specific GPEs later | |
563 | */ | |
3d97e426 | 564 | acpi_disable_all_gpes(); |
d5a64513 | 565 | /* Allow EC transactions to happen. */ |
fe955682 | 566 | acpi_ec_unblock_transactions_early(); |
a3627f67 | 567 | |
2a6b6976 MG |
568 | suspend_nvs_restore(); |
569 | ||
1da177e4 LT |
570 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
571 | } | |
572 | ||
2c6e33c3 | 573 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 574 | { |
e8c9c502 | 575 | u32 acpi_state; |
eb9289eb | 576 | |
e8c9c502 JB |
577 | switch (pm_state) { |
578 | case PM_SUSPEND_ON: | |
579 | case PM_SUSPEND_STANDBY: | |
580 | case PM_SUSPEND_MEM: | |
581 | acpi_state = acpi_suspend_states[pm_state]; | |
582 | ||
583 | return sleep_states[acpi_state]; | |
584 | default: | |
585 | return 0; | |
586 | } | |
eb9289eb SL |
587 | } |
588 | ||
2f55ac07 | 589 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
590 | .valid = acpi_suspend_state_valid, |
591 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 592 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 593 | .enter = acpi_suspend_enter, |
618d7fd0 | 594 | .wake = acpi_pm_finish, |
d8f3de0d RW |
595 | .end = acpi_pm_end, |
596 | }; | |
597 | ||
598 | /** | |
599 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
600 | * state associated with given @pm_state, if supported, and | |
601 | * execute the _PTS control method. This function is used if the | |
602 | * pre-ACPI 2.0 suspend ordering has been requested. | |
603 | */ | |
604 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
605 | { | |
606 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
607 | if (!error) |
608 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 609 | |
d8f3de0d RW |
610 | return error; |
611 | } | |
612 | ||
613 | /* | |
614 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
615 | * been requested. | |
616 | */ | |
2f55ac07 | 617 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
618 | .valid = acpi_suspend_state_valid, |
619 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 620 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 621 | .enter = acpi_suspend_enter, |
618d7fd0 | 622 | .wake = acpi_pm_finish, |
d8f3de0d RW |
623 | .end = acpi_pm_end, |
624 | .recover = acpi_pm_finish, | |
1da177e4 | 625 | }; |
02040f0b | 626 | |
1f0b6386 RW |
627 | static int acpi_freeze_begin(void) |
628 | { | |
629 | acpi_scan_lock_acquire(); | |
630 | return 0; | |
631 | } | |
632 | ||
a8d46b9e RW |
633 | static int acpi_freeze_prepare(void) |
634 | { | |
7b02ccea | 635 | acpi_enable_wakeup_devices(ACPI_STATE_S0); |
a8d46b9e | 636 | acpi_enable_all_wakeup_gpes(); |
c52fa70c | 637 | acpi_os_wait_events_complete(); |
8c01275e CY |
638 | if (acpi_sci_irq_valid()) |
639 | enable_irq_wake(acpi_sci_irq); | |
a8d46b9e RW |
640 | return 0; |
641 | } | |
642 | ||
643 | static void acpi_freeze_restore(void) | |
644 | { | |
7b02ccea | 645 | acpi_disable_wakeup_devices(ACPI_STATE_S0); |
8c01275e CY |
646 | if (acpi_sci_irq_valid()) |
647 | disable_irq_wake(acpi_sci_irq); | |
a8d46b9e RW |
648 | acpi_enable_all_runtime_gpes(); |
649 | } | |
650 | ||
1f0b6386 RW |
651 | static void acpi_freeze_end(void) |
652 | { | |
653 | acpi_scan_lock_release(); | |
654 | } | |
655 | ||
656 | static const struct platform_freeze_ops acpi_freeze_ops = { | |
657 | .begin = acpi_freeze_begin, | |
a8d46b9e RW |
658 | .prepare = acpi_freeze_prepare, |
659 | .restore = acpi_freeze_restore, | |
1f0b6386 RW |
660 | .end = acpi_freeze_end, |
661 | }; | |
662 | ||
02040f0b RW |
663 | static void acpi_sleep_suspend_setup(void) |
664 | { | |
665 | int i; | |
666 | ||
a4e90bed RW |
667 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) |
668 | if (acpi_sleep_state_supported(i)) | |
02040f0b | 669 | sleep_states[i] = 1; |
02040f0b RW |
670 | |
671 | suspend_set_ops(old_suspend_ordering ? | |
672 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
1f0b6386 | 673 | freeze_set_ops(&acpi_freeze_ops); |
02040f0b | 674 | } |
1f0b6386 | 675 | |
02040f0b RW |
676 | #else /* !CONFIG_SUSPEND */ |
677 | static inline void acpi_sleep_suspend_setup(void) {} | |
678 | #endif /* !CONFIG_SUSPEND */ | |
296699de | 679 | |
b0cb1a19 | 680 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
681 | static unsigned long s4_hardware_signature; |
682 | static struct acpi_table_facs *facs; | |
683 | static bool nosigcheck; | |
684 | ||
685 | void __init acpi_no_s4_hw_signature(void) | |
686 | { | |
687 | nosigcheck = true; | |
688 | } | |
689 | ||
caea99ef | 690 | static int acpi_hibernation_begin(void) |
74f270af | 691 | { |
3f4b0ef7 RW |
692 | int error; |
693 | ||
72ad5d77 | 694 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
ad07277e RW |
695 | if (!error) |
696 | acpi_pm_start(ACPI_STATE_S4); | |
3f4b0ef7 RW |
697 | |
698 | return error; | |
699 | } | |
700 | ||
a3d25c27 RW |
701 | static int acpi_hibernation_enter(void) |
702 | { | |
703 | acpi_status status = AE_OK; | |
a3d25c27 RW |
704 | |
705 | ACPI_FLUSH_CPU_CACHE(); | |
706 | ||
a3d25c27 | 707 | /* This shouldn't return. If it returns, we have a problem */ |
3f6f49c7 LB |
708 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
709 | /* Reprogram control registers */ | |
710 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
711 | |
712 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
713 | } | |
714 | ||
c7e0831d RW |
715 | static void acpi_hibernation_leave(void) |
716 | { | |
717 | /* | |
718 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
719 | * enable it here. | |
720 | */ | |
721 | acpi_enable(); | |
3f6f49c7 LB |
722 | /* Reprogram control registers */ |
723 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c | 724 | /* Check the hardware signature */ |
5c551e62 ON |
725 | if (facs && s4_hardware_signature != facs->hardware_signature) |
726 | pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n"); | |
3f4b0ef7 | 727 | /* Restore the NVS memory area */ |
dd4c4f17 | 728 | suspend_nvs_restore(); |
d5a64513 | 729 | /* Allow EC transactions to happen. */ |
fe955682 | 730 | acpi_ec_unblock_transactions_early(); |
c7e0831d RW |
731 | } |
732 | ||
d5a64513 | 733 | static void acpi_pm_thaw(void) |
f6bb13aa | 734 | { |
fe955682 | 735 | acpi_ec_unblock_transactions(); |
3d97e426 | 736 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
737 | } |
738 | ||
073ef1f6 | 739 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
740 | .begin = acpi_hibernation_begin, |
741 | .end = acpi_pm_end, | |
c5f7a1bb | 742 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 743 | .finish = acpi_pm_finish, |
d8f3de0d RW |
744 | .prepare = acpi_pm_prepare, |
745 | .enter = acpi_hibernation_enter, | |
746 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
747 | .pre_restore = acpi_pm_freeze, |
748 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 749 | }; |
caea99ef | 750 | |
d8f3de0d RW |
751 | /** |
752 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
753 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
754 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
755 | * requested. | |
756 | */ | |
757 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 758 | { |
e49f711c ZY |
759 | int error; |
760 | /* | |
761 | * The _TTS object should always be evaluated before the _PTS object. | |
762 | * When the old_suspended_ordering is true, the _PTS object is | |
763 | * evaluated in the acpi_sleep_prepare. | |
764 | */ | |
765 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
766 | ||
767 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 768 | |
3f4b0ef7 | 769 | if (!error) { |
72ad5d77 | 770 | if (!nvs_nosave) |
dd4c4f17 | 771 | error = suspend_nvs_alloc(); |
ad07277e | 772 | if (!error) { |
3f4b0ef7 | 773 | acpi_target_sleep_state = ACPI_STATE_S4; |
ad07277e RW |
774 | acpi_scan_lock_acquire(); |
775 | } | |
3f4b0ef7 RW |
776 | } |
777 | return error; | |
778 | } | |
779 | ||
d8f3de0d RW |
780 | /* |
781 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
782 | * been requested. | |
783 | */ | |
073ef1f6 | 784 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
785 | .begin = acpi_hibernation_begin_old, |
786 | .end = acpi_pm_end, | |
c5f7a1bb | 787 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 788 | .prepare = acpi_pm_freeze, |
2a6b6976 | 789 | .finish = acpi_pm_finish, |
a3d25c27 | 790 | .enter = acpi_hibernation_enter, |
c7e0831d | 791 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
792 | .pre_restore = acpi_pm_freeze, |
793 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 794 | .recover = acpi_pm_finish, |
a3d25c27 | 795 | }; |
02040f0b RW |
796 | |
797 | static void acpi_sleep_hibernate_setup(void) | |
798 | { | |
a4e90bed | 799 | if (!acpi_sleep_state_supported(ACPI_STATE_S4)) |
02040f0b RW |
800 | return; |
801 | ||
802 | hibernation_set_ops(old_suspend_ordering ? | |
803 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
804 | sleep_states[ACPI_STATE_S4] = 1; | |
02040f0b RW |
805 | if (nosigcheck) |
806 | return; | |
807 | ||
808 | acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); | |
809 | if (facs) | |
810 | s4_hardware_signature = facs->hardware_signature; | |
811 | } | |
812 | #else /* !CONFIG_HIBERNATION */ | |
813 | static inline void acpi_sleep_hibernate_setup(void) {} | |
814 | #endif /* !CONFIG_HIBERNATION */ | |
a3d25c27 | 815 | |
f216cc37 AS |
816 | static void acpi_power_off_prepare(void) |
817 | { | |
818 | /* Prepare to power off the system */ | |
819 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 820 | acpi_disable_all_gpes(); |
c52fa70c | 821 | acpi_os_wait_events_complete(); |
f216cc37 AS |
822 | } |
823 | ||
824 | static void acpi_power_off(void) | |
825 | { | |
826 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 827 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 828 | local_irq_disable(); |
3f6f49c7 | 829 | acpi_enter_sleep_state(ACPI_STATE_S5); |
96f15efc LB |
830 | } |
831 | ||
aafbcd16 | 832 | int __init acpi_sleep_init(void) |
1da177e4 | 833 | { |
ed4cf5b2 JP |
834 | char supported[ACPI_S_STATE_COUNT * 3 + 1]; |
835 | char *pos = supported; | |
836 | int i; | |
1da177e4 | 837 | |
0ac1b1d7 ZR |
838 | acpi_sleep_dmi_check(); |
839 | ||
5a50fe70 | 840 | sleep_states[ACPI_STATE_S0] = 1; |
5a50fe70 | 841 | |
02040f0b RW |
842 | acpi_sleep_suspend_setup(); |
843 | acpi_sleep_hibernate_setup(); | |
1da177e4 | 844 | |
a4e90bed | 845 | if (acpi_sleep_state_supported(ACPI_STATE_S5)) { |
f216cc37 | 846 | sleep_states[ACPI_STATE_S5] = 1; |
f216cc37 AS |
847 | pm_power_off_prepare = acpi_power_off_prepare; |
848 | pm_power_off = acpi_power_off; | |
849 | } | |
ed4cf5b2 JP |
850 | |
851 | supported[0] = 0; | |
852 | for (i = 0; i < ACPI_S_STATE_COUNT; i++) { | |
853 | if (sleep_states[i]) | |
854 | pos += sprintf(pos, " S%d", i); | |
855 | } | |
856 | pr_info(PREFIX "(supports%s)\n", supported); | |
857 | ||
e49f711c ZY |
858 | /* |
859 | * Register the tts_notifier to reboot notifier list so that the _TTS | |
860 | * object can also be evaluated when the system enters S5. | |
861 | */ | |
862 | register_reboot_notifier(&tts_notifier); | |
1da177e4 LT |
863 | return 0; |
864 | } |