Commit | Line | Data |
---|---|---|
55716d26 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * sleep.c - ACPI sleep support. | |
4 | * | |
e2a5b420 | 5 | * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> |
1da177e4 LT |
6 | * Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com> |
7 | * Copyright (c) 2000-2003 Patrick Mochel | |
8 | * Copyright (c) 2003 Open Source Development Lab | |
1da177e4 LT |
9 | */ |
10 | ||
11 | #include <linux/delay.h> | |
12 | #include <linux/irq.h> | |
13 | #include <linux/dmi.h> | |
14 | #include <linux/device.h> | |
a8d46b9e | 15 | #include <linux/interrupt.h> |
1da177e4 | 16 | #include <linux/suspend.h> |
e49f711c | 17 | #include <linux/reboot.h> |
d1ee4335 | 18 | #include <linux/acpi.h> |
a2ef5c4f | 19 | #include <linux/module.h> |
504997cf | 20 | #include <linux/syscore_ops.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 | ||
13737181 CY |
27 | /* |
28 | * Some HW-full platforms do not have _S5, so they may need | |
29 | * to leverage efi power off for a shutdown. | |
30 | */ | |
31 | bool acpi_no_s5; | |
01eac60b | 32 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
1da177e4 | 33 | |
e49f711c ZY |
34 | static void acpi_sleep_tts_switch(u32 acpi_state) |
35 | { | |
0db98202 | 36 | acpi_status status; |
e49f711c | 37 | |
0db98202 | 38 | status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state); |
e49f711c ZY |
39 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
40 | /* | |
41 | * OS can't evaluate the _TTS object correctly. Some warning | |
42 | * message will be printed. But it won't break anything. | |
43 | */ | |
44 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); | |
45 | } | |
46 | } | |
47 | ||
9713adc2 | 48 | static int tts_notify_reboot(struct notifier_block *this, |
e49f711c ZY |
49 | unsigned long code, void *x) |
50 | { | |
51 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
52 | return NOTIFY_DONE; | |
53 | } | |
54 | ||
9713adc2 RW |
55 | static struct notifier_block tts_notifier = { |
56 | .notifier_call = tts_notify_reboot, | |
e49f711c ZY |
57 | .next = NULL, |
58 | .priority = 0, | |
59 | }; | |
60 | ||
c9b6c8f6 | 61 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
62 | { |
63 | #ifdef CONFIG_ACPI_SLEEP | |
64 | /* do we have a wakeup address for S2 and S3? */ | |
65 | if (acpi_state == ACPI_STATE_S3) { | |
319b6ffc | 66 | if (!acpi_wakeup_address) |
2f3f2226 | 67 | return -EFAULT; |
e3e9b577 | 68 | acpi_set_waking_vector(acpi_wakeup_address); |
2f3f2226 AS |
69 | |
70 | } | |
71 | ACPI_FLUSH_CPU_CACHE(); | |
2f3f2226 | 72 | #endif |
c9b6c8f6 RW |
73 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
74 | acpi_state); | |
78f5f023 | 75 | acpi_enable_wakeup_devices(acpi_state); |
2f3f2226 AS |
76 | acpi_enter_sleep_state_prep(acpi_state); |
77 | return 0; | |
78 | } | |
79 | ||
a4e90bed RW |
80 | static bool acpi_sleep_state_supported(u8 sleep_state) |
81 | { | |
82 | acpi_status status; | |
83 | u8 type_a, type_b; | |
84 | ||
85 | status = acpi_get_sleep_type_data(sleep_state, &type_a, &type_b); | |
86 | return ACPI_SUCCESS(status) && (!acpi_gbl_reduced_hardware | |
87 | || (acpi_gbl_FADT.sleep_control.address | |
88 | && acpi_gbl_FADT.sleep_status.address)); | |
89 | } | |
90 | ||
5d1e072b | 91 | #ifdef CONFIG_ACPI_SLEEP |
091aad6a | 92 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
a6ae7594 RW |
93 | |
94 | u32 acpi_target_system_state(void) | |
95 | { | |
96 | return acpi_target_sleep_state; | |
97 | } | |
fad16dd9 | 98 | EXPORT_SYMBOL_GPL(acpi_target_system_state); |
a6ae7594 | 99 | |
a5ca7345 | 100 | static bool pwr_btn_event_pending; |
091aad6a | 101 | |
72ad5d77 RW |
102 | /* |
103 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
104 | * and to restore them during the subsequent resume. Windows does that also for | |
105 | * suspend to RAM. However, it is known that this mechanism does not work on | |
106 | * all machines, so we allow the user to disable it with the help of the | |
107 | * 'acpi_sleep=nonvs' kernel command line option. | |
108 | */ | |
109 | static bool nvs_nosave; | |
110 | ||
111 | void __init acpi_nvs_nosave(void) | |
112 | { | |
113 | nvs_nosave = true; | |
114 | } | |
115 | ||
1bad2f19 KCA |
116 | /* |
117 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
118 | * but says nothing about saving NVS during S3. Not all versions of Windows | |
119 | * save NVS on S3 suspend either, and it is clear that not all systems need | |
120 | * NVS to be saved at S3 time. To improve suspend/resume time, allow the | |
121 | * user to disable saving NVS on S3 if their system does not require it, but | |
122 | * continue to save/restore NVS for S4 as specified. | |
123 | */ | |
124 | static bool nvs_nosave_s3; | |
125 | ||
126 | void __init acpi_nvs_nosave_s3(void) | |
127 | { | |
128 | nvs_nosave_s3 = true; | |
129 | } | |
130 | ||
cbc00c13 ZR |
131 | static int __init init_nvs_save_s3(const struct dmi_system_id *d) |
132 | { | |
133 | nvs_nosave_s3 = false; | |
134 | return 0; | |
135 | } | |
136 | ||
d8f3de0d RW |
137 | /* |
138 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
139 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
140 | * kernel command line option that causes the following variable to be set. | |
141 | */ | |
142 | static bool old_suspend_ordering; | |
143 | ||
144 | void __init acpi_old_suspend_ordering(void) | |
145 | { | |
146 | old_suspend_ordering = true; | |
147 | } | |
148 | ||
0ac1b1d7 ZR |
149 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
150 | { | |
151 | acpi_old_suspend_ordering(); | |
152 | return 0; | |
153 | } | |
154 | ||
155 | static int __init init_nvs_nosave(const struct dmi_system_id *d) | |
156 | { | |
157 | acpi_nvs_nosave(); | |
158 | return 0; | |
159 | } | |
160 | ||
71630b7a RW |
161 | static bool acpi_sleep_no_lps0; |
162 | ||
163 | static int __init init_no_lps0(const struct dmi_system_id *d) | |
164 | { | |
165 | acpi_sleep_no_lps0 = true; | |
166 | return 0; | |
167 | } | |
168 | ||
6faadbbb | 169 | static const struct dmi_system_id acpisleep_dmi_table[] __initconst = { |
0ac1b1d7 ZR |
170 | { |
171 | .callback = init_old_suspend_ordering, | |
172 | .ident = "Abit KN9 (nForce4 variant)", | |
173 | .matches = { | |
174 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
175 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
176 | }, | |
177 | }, | |
178 | { | |
179 | .callback = init_old_suspend_ordering, | |
180 | .ident = "HP xw4600 Workstation", | |
181 | .matches = { | |
182 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
183 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
184 | }, | |
185 | }, | |
186 | { | |
187 | .callback = init_old_suspend_ordering, | |
188 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
189 | .matches = { | |
190 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
191 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
192 | }, | |
193 | }, | |
194 | { | |
195 | .callback = init_old_suspend_ordering, | |
196 | .ident = "Panasonic CF51-2L", | |
197 | .matches = { | |
198 | DMI_MATCH(DMI_BOARD_VENDOR, | |
199 | "Matsushita Electric Industrial Co.,Ltd."), | |
200 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
201 | }, | |
202 | }, | |
203 | { | |
204 | .callback = init_nvs_nosave, | |
66f2fda9 JS |
205 | .ident = "Sony Vaio VGN-FW41E_H", |
206 | .matches = { | |
207 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
208 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"), | |
209 | }, | |
210 | }, | |
211 | { | |
212 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
213 | .ident = "Sony Vaio VGN-FW21E", |
214 | .matches = { | |
215 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
216 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
217 | }, | |
218 | }, | |
219 | { | |
220 | .callback = init_nvs_nosave, | |
469dd1c4 FV |
221 | .ident = "Sony Vaio VGN-FW21M", |
222 | .matches = { | |
223 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
224 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"), | |
225 | }, | |
226 | }, | |
227 | { | |
228 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
229 | .ident = "Sony Vaio VPCEB17FX", |
230 | .matches = { | |
231 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
232 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
233 | }, | |
234 | }, | |
235 | { | |
236 | .callback = init_nvs_nosave, | |
237 | .ident = "Sony Vaio VGN-SR11M", | |
238 | .matches = { | |
239 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
240 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
241 | }, | |
242 | }, | |
243 | { | |
244 | .callback = init_nvs_nosave, | |
245 | .ident = "Everex StepNote Series", | |
246 | .matches = { | |
247 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
248 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
249 | }, | |
250 | }, | |
251 | { | |
252 | .callback = init_nvs_nosave, | |
253 | .ident = "Sony Vaio VPCEB1Z1E", | |
254 | .matches = { | |
255 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
256 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
257 | }, | |
258 | }, | |
259 | { | |
260 | .callback = init_nvs_nosave, | |
261 | .ident = "Sony Vaio VGN-NW130D", | |
262 | .matches = { | |
263 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
264 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
265 | }, | |
266 | }, | |
267 | { | |
268 | .callback = init_nvs_nosave, | |
269 | .ident = "Sony Vaio VPCCW29FX", | |
270 | .matches = { | |
271 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
272 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
273 | }, | |
274 | }, | |
275 | { | |
276 | .callback = init_nvs_nosave, | |
277 | .ident = "Averatec AV1020-ED2", | |
278 | .matches = { | |
279 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
280 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
281 | }, | |
282 | }, | |
283 | { | |
284 | .callback = init_old_suspend_ordering, | |
285 | .ident = "Asus A8N-SLI DELUXE", | |
286 | .matches = { | |
287 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
288 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
289 | }, | |
290 | }, | |
291 | { | |
292 | .callback = init_old_suspend_ordering, | |
293 | .ident = "Asus A8N-SLI Premium", | |
294 | .matches = { | |
295 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
296 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
297 | }, | |
298 | }, | |
299 | { | |
300 | .callback = init_nvs_nosave, | |
301 | .ident = "Sony Vaio VGN-SR26GN_P", | |
302 | .matches = { | |
303 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
304 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
305 | }, | |
306 | }, | |
307 | { | |
308 | .callback = init_nvs_nosave, | |
309 | .ident = "Sony Vaio VPCEB1S1E", | |
310 | .matches = { | |
311 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
312 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), | |
313 | }, | |
314 | }, | |
315 | { | |
316 | .callback = init_nvs_nosave, | |
317 | .ident = "Sony Vaio VGN-FW520F", | |
318 | .matches = { | |
319 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
320 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
321 | }, | |
322 | }, | |
323 | { | |
324 | .callback = init_nvs_nosave, | |
325 | .ident = "Asus K54C", | |
326 | .matches = { | |
327 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
328 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
329 | }, | |
330 | }, | |
331 | { | |
332 | .callback = init_nvs_nosave, | |
333 | .ident = "Asus K54HR", | |
334 | .matches = { | |
335 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
336 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
337 | }, | |
338 | }, | |
231f9415 WT |
339 | { |
340 | .callback = init_nvs_save_s3, | |
341 | .ident = "Asus 1025C", | |
342 | .matches = { | |
343 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
344 | DMI_MATCH(DMI_PRODUCT_NAME, "1025C"), | |
345 | }, | |
346 | }, | |
cbc00c13 ZR |
347 | /* |
348 | * https://bugzilla.kernel.org/show_bug.cgi?id=189431 | |
349 | * Lenovo G50-45 is a platform later than 2012, but needs nvs memory | |
350 | * saving during S3. | |
351 | */ | |
352 | { | |
353 | .callback = init_nvs_save_s3, | |
354 | .ident = "Lenovo G50-45", | |
355 | .matches = { | |
356 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
357 | DMI_MATCH(DMI_PRODUCT_NAME, "80E3"), | |
358 | }, | |
359 | }, | |
71630b7a RW |
360 | /* |
361 | * https://bugzilla.kernel.org/show_bug.cgi?id=196907 | |
362 | * Some Dell XPS13 9360 cannot do suspend-to-idle using the Low Power | |
363 | * S0 Idle firmware interface. | |
364 | */ | |
365 | { | |
366 | .callback = init_no_lps0, | |
367 | .ident = "Dell XPS13 9360", | |
368 | .matches = { | |
369 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
370 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9360"), | |
371 | }, | |
372 | }, | |
855c1c2f CY |
373 | /* |
374 | * ThinkPad X1 Tablet(2016) cannot do suspend-to-idle using | |
375 | * the Low Power S0 Idle firmware interface (see | |
376 | * https://bugzilla.kernel.org/show_bug.cgi?id=199057). | |
377 | */ | |
378 | { | |
379 | .callback = init_no_lps0, | |
380 | .ident = "ThinkPad X1 Tablet(2016)", | |
381 | .matches = { | |
382 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
383 | DMI_MATCH(DMI_PRODUCT_NAME, "20GGA00L00"), | |
384 | }, | |
385 | }, | |
0ac1b1d7 ZR |
386 | {}, |
387 | }; | |
388 | ||
57044031 RW |
389 | static bool ignore_blacklist; |
390 | ||
391 | void __init acpi_sleep_no_blacklist(void) | |
392 | { | |
393 | ignore_blacklist = true; | |
394 | } | |
395 | ||
8b691c9c | 396 | static void __init acpi_sleep_dmi_check(void) |
0ac1b1d7 | 397 | { |
57044031 RW |
398 | if (ignore_blacklist) |
399 | return; | |
400 | ||
9c0a30b6 | 401 | if (dmi_get_bios_year() >= 2012) |
821d6f03 LT |
402 | acpi_nvs_nosave_s3(); |
403 | ||
0ac1b1d7 ZR |
404 | dmi_check_system(acpisleep_dmi_table); |
405 | } | |
406 | ||
d8f3de0d | 407 | /** |
d5a64513 | 408 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 409 | */ |
d5a64513 | 410 | static int acpi_pm_freeze(void) |
d8f3de0d | 411 | { |
3d97e426 | 412 | acpi_disable_all_gpes(); |
bd6f10a5 | 413 | acpi_os_wait_events_complete(); |
fe955682 | 414 | acpi_ec_block_transactions(); |
d8f3de0d RW |
415 | return 0; |
416 | } | |
417 | ||
c5f7a1bb RW |
418 | /** |
419 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
420 | */ | |
421 | static int acpi_pm_pre_suspend(void) | |
422 | { | |
423 | acpi_pm_freeze(); | |
26fcaf60 | 424 | return suspend_nvs_save(); |
c5f7a1bb RW |
425 | } |
426 | ||
d8f3de0d RW |
427 | /** |
428 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
429 | * | |
430 | * If necessary, set the firmware waking vector and do arch-specific | |
431 | * nastiness to get the wakeup code to the waking vector. | |
432 | */ | |
433 | static int __acpi_pm_prepare(void) | |
434 | { | |
435 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
436 | if (error) |
437 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 438 | |
d8f3de0d RW |
439 | return error; |
440 | } | |
441 | ||
442 | /** | |
443 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
444 | * state and disable the GPEs. | |
445 | */ | |
446 | static int acpi_pm_prepare(void) | |
447 | { | |
448 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 449 | if (!error) |
26fcaf60 | 450 | error = acpi_pm_pre_suspend(); |
d5a64513 | 451 | |
d8f3de0d RW |
452 | return error; |
453 | } | |
454 | ||
c10d7a13 DD |
455 | static int find_powerf_dev(struct device *dev, void *data) |
456 | { | |
457 | struct acpi_device *device = to_acpi_device(dev); | |
458 | const char *hid = acpi_device_hid(device); | |
459 | ||
460 | return !strcmp(hid, ACPI_BUTTON_HID_POWERF); | |
461 | } | |
462 | ||
d8f3de0d RW |
463 | /** |
464 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
465 | * | |
466 | * This is called after we wake back up (or if entering the sleep state | |
467 | * failed). | |
468 | */ | |
469 | static void acpi_pm_finish(void) | |
470 | { | |
c10d7a13 | 471 | struct device *pwr_btn_dev; |
d8f3de0d RW |
472 | u32 acpi_state = acpi_target_sleep_state; |
473 | ||
42de5532 | 474 | acpi_ec_unblock_transactions(); |
d551d81d | 475 | suspend_nvs_free(); |
2a6b6976 | 476 | |
d8f3de0d RW |
477 | if (acpi_state == ACPI_STATE_S0) |
478 | return; | |
1da177e4 | 479 | |
d8f3de0d RW |
480 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
481 | acpi_state); | |
78f5f023 | 482 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
483 | acpi_leave_sleep_state(acpi_state); |
484 | ||
485 | /* reset firmware waking vector */ | |
e3e9b577 | 486 | acpi_set_waking_vector(0); |
d8f3de0d RW |
487 | |
488 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c10d7a13 | 489 | |
781d737c RW |
490 | acpi_resume_power_resources(); |
491 | ||
c10d7a13 DD |
492 | /* If we were woken with the fixed power button, provide a small |
493 | * hint to userspace in the form of a wakeup event on the fixed power | |
494 | * button device (if it can be found). | |
495 | * | |
496 | * We delay the event generation til now, as the PM layer requires | |
497 | * timekeeping to be running before we generate events. */ | |
498 | if (!pwr_btn_event_pending) | |
499 | return; | |
500 | ||
501 | pwr_btn_event_pending = false; | |
502 | pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, | |
503 | find_powerf_dev); | |
504 | if (pwr_btn_dev) { | |
505 | pm_wakeup_event(pwr_btn_dev, 0); | |
506 | put_device(pwr_btn_dev); | |
507 | } | |
d8f3de0d RW |
508 | } |
509 | ||
510 | /** | |
ad07277e RW |
511 | * acpi_pm_start - Start system PM transition. |
512 | */ | |
513 | static void acpi_pm_start(u32 acpi_state) | |
514 | { | |
515 | acpi_target_sleep_state = acpi_state; | |
516 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
517 | acpi_scan_lock_acquire(); | |
518 | } | |
519 | ||
520 | /** | |
521 | * acpi_pm_end - Finish up system PM transition. | |
d8f3de0d RW |
522 | */ |
523 | static void acpi_pm_end(void) | |
524 | { | |
8ece1d83 | 525 | acpi_turn_off_unused_power_resources(); |
ad07277e | 526 | acpi_scan_lock_release(); |
d8f3de0d RW |
527 | /* |
528 | * This is necessary in case acpi_pm_finish() is not called during a | |
529 | * failing transition to a sleep state. | |
530 | */ | |
531 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 532 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 533 | } |
92daa7b5 RW |
534 | #else /* !CONFIG_ACPI_SLEEP */ |
535 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
71630b7a | 536 | #define acpi_sleep_no_lps0 (false) |
0ac1b1d7 | 537 | static inline void acpi_sleep_dmi_check(void) {} |
5d1e072b | 538 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 539 | |
d8f3de0d | 540 | #ifdef CONFIG_SUSPEND |
1da177e4 | 541 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
542 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
543 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
544 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 545 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
546 | }; |
547 | ||
e9b3aba8 | 548 | /** |
2c6e33c3 | 549 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
550 | * associated with given @pm_state, if supported. |
551 | */ | |
2c6e33c3 | 552 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
553 | { |
554 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
ad07277e | 555 | int error; |
e9b3aba8 | 556 | |
1bad2f19 | 557 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
558 | if (error) |
559 | return error; | |
560 | ||
ad07277e RW |
561 | if (!sleep_states[acpi_state]) { |
562 | pr_err("ACPI does not support sleep state S%u\n", acpi_state); | |
563 | return -ENOSYS; | |
e9b3aba8 | 564 | } |
ef25ba04 RW |
565 | if (acpi_state > ACPI_STATE_S1) |
566 | pm_set_suspend_via_firmware(); | |
ad07277e RW |
567 | |
568 | acpi_pm_start(acpi_state); | |
569 | return 0; | |
e9b3aba8 RW |
570 | } |
571 | ||
1da177e4 | 572 | /** |
2c6e33c3 | 573 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 574 | * @pm_state: ignored |
1da177e4 | 575 | * |
50ad147a RW |
576 | * Flush caches and go to sleep. For STR we have to call arch-specific |
577 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
578 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
579 | */ | |
2c6e33c3 | 580 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
581 | { |
582 | acpi_status status = AE_OK; | |
e9b3aba8 | 583 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 584 | int error; |
1da177e4 LT |
585 | |
586 | ACPI_FLUSH_CPU_CACHE(); | |
587 | ||
bb3632c6 | 588 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true); |
e9b3aba8 RW |
589 | switch (acpi_state) { |
590 | case ACPI_STATE_S1: | |
1da177e4 | 591 | barrier(); |
3f6f49c7 | 592 | status = acpi_enter_sleep_state(acpi_state); |
1da177e4 LT |
593 | break; |
594 | ||
e9b3aba8 | 595 | case ACPI_STATE_S3: |
d6a77ead KRW |
596 | if (!acpi_suspend_lowlevel) |
597 | return -ENOSYS; | |
f1a2003e | 598 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
599 | if (error) |
600 | return error; | |
7a63f08b | 601 | pr_info(PREFIX "Low-level resume complete\n"); |
ef25ba04 | 602 | pm_set_resume_via_firmware(); |
1da177e4 | 603 | break; |
1da177e4 | 604 | } |
bb3632c6 | 605 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false); |
872d83d0 | 606 | |
b6dacf63 MG |
607 | /* This violates the spec but is required for bug compatibility. */ |
608 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 609 | |
3f6f49c7 LB |
610 | /* Reprogram control registers */ |
611 | acpi_leave_sleep_state_prep(acpi_state); | |
c95d47a8 | 612 | |
23b168d4 | 613 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
614 | * of the OSPM to clear the status bit [ implying that the |
615 | * POWER_BUTTON event should not reach userspace ] | |
c10d7a13 DD |
616 | * |
617 | * However, we do generate a small hint for userspace in the form of | |
618 | * a wakeup event. We flag this condition for now and generate the | |
619 | * event later, as we're currently too early in resume to be able to | |
620 | * generate wakeup events. | |
872d83d0 | 621 | */ |
c10d7a13 | 622 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
51468a9d | 623 | acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED; |
c10d7a13 DD |
624 | |
625 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); | |
626 | ||
18864cc4 | 627 | if (pwr_btn_status & ACPI_EVENT_FLAG_STATUS_SET) { |
c10d7a13 DD |
628 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); |
629 | /* Flag for later */ | |
630 | pwr_btn_event_pending = true; | |
631 | } | |
632 | } | |
872d83d0 | 633 | |
a3627f67 SL |
634 | /* |
635 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
636 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
637 | * acpi_leave_sleep_state will reenable specific GPEs later | |
638 | */ | |
3d97e426 | 639 | acpi_disable_all_gpes(); |
d5a64513 | 640 | /* Allow EC transactions to happen. */ |
c2b46d67 | 641 | acpi_ec_unblock_transactions(); |
a3627f67 | 642 | |
2a6b6976 MG |
643 | suspend_nvs_restore(); |
644 | ||
1da177e4 LT |
645 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
646 | } | |
647 | ||
2c6e33c3 | 648 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 649 | { |
e8c9c502 | 650 | u32 acpi_state; |
eb9289eb | 651 | |
e8c9c502 JB |
652 | switch (pm_state) { |
653 | case PM_SUSPEND_ON: | |
654 | case PM_SUSPEND_STANDBY: | |
655 | case PM_SUSPEND_MEM: | |
656 | acpi_state = acpi_suspend_states[pm_state]; | |
657 | ||
658 | return sleep_states[acpi_state]; | |
659 | default: | |
660 | return 0; | |
661 | } | |
eb9289eb SL |
662 | } |
663 | ||
2f55ac07 | 664 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
665 | .valid = acpi_suspend_state_valid, |
666 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 667 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 668 | .enter = acpi_suspend_enter, |
618d7fd0 | 669 | .wake = acpi_pm_finish, |
d8f3de0d RW |
670 | .end = acpi_pm_end, |
671 | }; | |
672 | ||
673 | /** | |
674 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
675 | * state associated with given @pm_state, if supported, and | |
676 | * execute the _PTS control method. This function is used if the | |
677 | * pre-ACPI 2.0 suspend ordering has been requested. | |
678 | */ | |
679 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
680 | { | |
681 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
682 | if (!error) |
683 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 684 | |
d8f3de0d RW |
685 | return error; |
686 | } | |
687 | ||
688 | /* | |
689 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
690 | * been requested. | |
691 | */ | |
2f55ac07 | 692 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
693 | .valid = acpi_suspend_state_valid, |
694 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 695 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 696 | .enter = acpi_suspend_enter, |
618d7fd0 | 697 | .wake = acpi_pm_finish, |
d8f3de0d RW |
698 | .end = acpi_pm_end, |
699 | .recover = acpi_pm_finish, | |
1da177e4 | 700 | }; |
02040f0b | 701 | |
8110dd28 | 702 | static bool s2idle_in_progress; |
33e4f80e RW |
703 | static bool s2idle_wakeup; |
704 | ||
8110dd28 RW |
705 | /* |
706 | * On platforms supporting the Low Power S0 Idle interface there is an ACPI | |
707 | * device object with the PNP0D80 compatible device ID (System Power Management | |
708 | * Controller) and a specific _DSM method under it. That method, if present, | |
709 | * can be used to indicate to the platform that the OS is transitioning into a | |
710 | * low-power state in which certain types of activity are not desirable or that | |
711 | * it is leaving such a state, which allows the platform to adjust its operation | |
712 | * mode accordingly. | |
713 | */ | |
714 | static const struct acpi_device_id lps0_device_ids[] = { | |
715 | {"PNP0D80", }, | |
716 | {"", }, | |
717 | }; | |
718 | ||
719 | #define ACPI_LPS0_DSM_UUID "c4eb40a0-6cd2-11e2-bcfd-0800200c9a66" | |
720 | ||
726fb6b4 | 721 | #define ACPI_LPS0_GET_DEVICE_CONSTRAINTS 1 |
8110dd28 RW |
722 | #define ACPI_LPS0_SCREEN_OFF 3 |
723 | #define ACPI_LPS0_SCREEN_ON 4 | |
724 | #define ACPI_LPS0_ENTRY 5 | |
725 | #define ACPI_LPS0_EXIT 6 | |
726 | ||
8110dd28 RW |
727 | static acpi_handle lps0_device_handle; |
728 | static guid_t lps0_dsm_guid; | |
729 | static char lps0_dsm_func_mask; | |
730 | ||
726fb6b4 SP |
731 | /* Device constraint entry structure */ |
732 | struct lpi_device_info { | |
733 | char *name; | |
734 | int enabled; | |
735 | union acpi_object *package; | |
736 | }; | |
737 | ||
738 | /* Constraint package structure */ | |
739 | struct lpi_device_constraint { | |
740 | int uid; | |
741 | int min_dstate; | |
742 | int function_states; | |
743 | }; | |
744 | ||
745 | struct lpi_constraints { | |
746 | acpi_handle handle; | |
747 | int min_dstate; | |
748 | }; | |
749 | ||
750 | static struct lpi_constraints *lpi_constraints_table; | |
751 | static int lpi_constraints_table_size; | |
752 | ||
753 | static void lpi_device_get_constraints(void) | |
754 | { | |
755 | union acpi_object *out_obj; | |
756 | int i; | |
757 | ||
758 | out_obj = acpi_evaluate_dsm_typed(lps0_device_handle, &lps0_dsm_guid, | |
759 | 1, ACPI_LPS0_GET_DEVICE_CONSTRAINTS, | |
760 | NULL, ACPI_TYPE_PACKAGE); | |
761 | ||
762 | acpi_handle_debug(lps0_device_handle, "_DSM function 1 eval %s\n", | |
763 | out_obj ? "successful" : "failed"); | |
764 | ||
765 | if (!out_obj) | |
766 | return; | |
767 | ||
768 | lpi_constraints_table = kcalloc(out_obj->package.count, | |
769 | sizeof(*lpi_constraints_table), | |
770 | GFP_KERNEL); | |
771 | if (!lpi_constraints_table) | |
772 | goto free_acpi_buffer; | |
773 | ||
774 | acpi_handle_debug(lps0_device_handle, "LPI: constraints list begin:\n"); | |
775 | ||
776 | for (i = 0; i < out_obj->package.count; i++) { | |
777 | struct lpi_constraints *constraint; | |
778 | acpi_status status; | |
779 | union acpi_object *package = &out_obj->package.elements[i]; | |
780 | struct lpi_device_info info = { }; | |
781 | int package_count = 0, j; | |
782 | ||
783 | if (!package) | |
784 | continue; | |
785 | ||
786 | for (j = 0; j < package->package.count; ++j) { | |
787 | union acpi_object *element = | |
788 | &(package->package.elements[j]); | |
789 | ||
790 | switch (element->type) { | |
791 | case ACPI_TYPE_INTEGER: | |
792 | info.enabled = element->integer.value; | |
793 | break; | |
794 | case ACPI_TYPE_STRING: | |
795 | info.name = element->string.pointer; | |
796 | break; | |
797 | case ACPI_TYPE_PACKAGE: | |
798 | package_count = element->package.count; | |
799 | info.package = element->package.elements; | |
800 | break; | |
801 | } | |
802 | } | |
803 | ||
804 | if (!info.enabled || !info.package || !info.name) | |
805 | continue; | |
806 | ||
807 | constraint = &lpi_constraints_table[lpi_constraints_table_size]; | |
808 | ||
809 | status = acpi_get_handle(NULL, info.name, &constraint->handle); | |
810 | if (ACPI_FAILURE(status)) | |
811 | continue; | |
812 | ||
813 | acpi_handle_debug(lps0_device_handle, | |
814 | "index:%d Name:%s\n", i, info.name); | |
815 | ||
816 | constraint->min_dstate = -1; | |
817 | ||
818 | for (j = 0; j < package_count; ++j) { | |
819 | union acpi_object *info_obj = &info.package[j]; | |
820 | union acpi_object *cnstr_pkg; | |
821 | union acpi_object *obj; | |
822 | struct lpi_device_constraint dev_info; | |
823 | ||
824 | switch (info_obj->type) { | |
825 | case ACPI_TYPE_INTEGER: | |
826 | /* version */ | |
827 | break; | |
828 | case ACPI_TYPE_PACKAGE: | |
829 | if (info_obj->package.count < 2) | |
830 | break; | |
831 | ||
832 | cnstr_pkg = info_obj->package.elements; | |
833 | obj = &cnstr_pkg[0]; | |
834 | dev_info.uid = obj->integer.value; | |
835 | obj = &cnstr_pkg[1]; | |
836 | dev_info.min_dstate = obj->integer.value; | |
837 | ||
838 | acpi_handle_debug(lps0_device_handle, | |
839 | "uid:%d min_dstate:%s\n", | |
840 | dev_info.uid, | |
841 | acpi_power_state_string(dev_info.min_dstate)); | |
842 | ||
843 | constraint->min_dstate = dev_info.min_dstate; | |
844 | break; | |
845 | } | |
846 | } | |
847 | ||
848 | if (constraint->min_dstate < 0) { | |
849 | acpi_handle_debug(lps0_device_handle, | |
850 | "Incomplete constraint defined\n"); | |
851 | continue; | |
852 | } | |
853 | ||
854 | lpi_constraints_table_size++; | |
855 | } | |
856 | ||
857 | acpi_handle_debug(lps0_device_handle, "LPI: constraints list end\n"); | |
858 | ||
859 | free_acpi_buffer: | |
860 | ACPI_FREE(out_obj); | |
861 | } | |
862 | ||
863 | static void lpi_check_constraints(void) | |
864 | { | |
865 | int i; | |
866 | ||
867 | for (i = 0; i < lpi_constraints_table_size; ++i) { | |
fa54150a | 868 | acpi_handle handle = lpi_constraints_table[i].handle; |
726fb6b4 SP |
869 | struct acpi_device *adev; |
870 | ||
fa54150a | 871 | if (!handle || acpi_bus_get_device(handle, &adev)) |
726fb6b4 SP |
872 | continue; |
873 | ||
fa54150a | 874 | acpi_handle_debug(handle, |
726fb6b4 SP |
875 | "LPI: required min power state:%s current power state:%s\n", |
876 | acpi_power_state_string(lpi_constraints_table[i].min_dstate), | |
877 | acpi_power_state_string(adev->power.state)); | |
878 | ||
879 | if (!adev->flags.power_manageable) { | |
fa54150a RW |
880 | acpi_handle_info(handle, "LPI: Device not power manageable\n"); |
881 | lpi_constraints_table[i].handle = NULL; | |
726fb6b4 SP |
882 | continue; |
883 | } | |
884 | ||
885 | if (adev->power.state < lpi_constraints_table[i].min_dstate) | |
fa54150a | 886 | acpi_handle_info(handle, |
726fb6b4 SP |
887 | "LPI: Constraint not met; min power state:%s current power state:%s\n", |
888 | acpi_power_state_string(lpi_constraints_table[i].min_dstate), | |
889 | acpi_power_state_string(adev->power.state)); | |
890 | } | |
891 | } | |
892 | ||
8110dd28 RW |
893 | static void acpi_sleep_run_lps0_dsm(unsigned int func) |
894 | { | |
895 | union acpi_object *out_obj; | |
896 | ||
897 | if (!(lps0_dsm_func_mask & (1 << func))) | |
898 | return; | |
899 | ||
900 | out_obj = acpi_evaluate_dsm(lps0_device_handle, &lps0_dsm_guid, 1, func, NULL); | |
901 | ACPI_FREE(out_obj); | |
902 | ||
903 | acpi_handle_debug(lps0_device_handle, "_DSM function %u evaluation %s\n", | |
904 | func, out_obj ? "successful" : "failed"); | |
905 | } | |
906 | ||
907 | static int lps0_device_attach(struct acpi_device *adev, | |
908 | const struct acpi_device_id *not_used) | |
909 | { | |
910 | union acpi_object *out_obj; | |
911 | ||
912 | if (lps0_device_handle) | |
913 | return 0; | |
914 | ||
71630b7a RW |
915 | if (acpi_sleep_no_lps0) { |
916 | acpi_handle_info(adev->handle, | |
917 | "Low Power S0 Idle interface disabled\n"); | |
918 | return 0; | |
919 | } | |
920 | ||
8110dd28 RW |
921 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) |
922 | return 0; | |
923 | ||
924 | guid_parse(ACPI_LPS0_DSM_UUID, &lps0_dsm_guid); | |
925 | /* Check if the _DSM is present and as expected. */ | |
926 | out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 1, 0, NULL); | |
927 | if (out_obj && out_obj->type == ACPI_TYPE_BUFFER) { | |
928 | char bitmask = *(char *)out_obj->buffer.pointer; | |
929 | ||
6f9db69a TC |
930 | lps0_dsm_func_mask = bitmask; |
931 | lps0_device_handle = adev->handle; | |
932 | /* | |
933 | * Use suspend-to-idle by default if the default | |
934 | * suspend mode was not set from the command line. | |
935 | */ | |
936 | if (mem_sleep_default > PM_SUSPEND_MEM) | |
937 | mem_sleep_current = PM_SUSPEND_TO_IDLE; | |
8110dd28 RW |
938 | |
939 | acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n", | |
940 | bitmask); | |
f941d3e4 RW |
941 | |
942 | acpi_ec_mark_gpe_for_wake(); | |
8110dd28 RW |
943 | } else { |
944 | acpi_handle_debug(adev->handle, | |
945 | "_DSM function 0 evaluation failed\n"); | |
946 | } | |
947 | ACPI_FREE(out_obj); | |
726fb6b4 SP |
948 | |
949 | lpi_device_get_constraints(); | |
950 | ||
8110dd28 RW |
951 | return 0; |
952 | } | |
953 | ||
954 | static struct acpi_scan_handler lps0_handler = { | |
955 | .ids = lps0_device_ids, | |
956 | .attach = lps0_device_attach, | |
957 | }; | |
958 | ||
23d5855f | 959 | static int acpi_s2idle_begin(void) |
1f0b6386 RW |
960 | { |
961 | acpi_scan_lock_acquire(); | |
8110dd28 | 962 | s2idle_in_progress = true; |
1f0b6386 RW |
963 | return 0; |
964 | } | |
965 | ||
23d5855f | 966 | static int acpi_s2idle_prepare(void) |
a8d46b9e | 967 | { |
8110dd28 RW |
968 | if (lps0_device_handle) { |
969 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF); | |
970 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY); | |
f941d3e4 RW |
971 | |
972 | acpi_ec_set_gpe_wake_mask(ACPI_GPE_ENABLE); | |
8110dd28 | 973 | } |
147a7d9d | 974 | |
8c01275e CY |
975 | if (acpi_sci_irq_valid()) |
976 | enable_irq_wake(acpi_sci_irq); | |
235d81a6 | 977 | |
2f844b61 RJ |
978 | acpi_enable_wakeup_devices(ACPI_STATE_S0); |
979 | ||
f941d3e4 RW |
980 | /* Change the configuration of GPEs to avoid spurious wakeup. */ |
981 | acpi_enable_all_wakeup_gpes(); | |
982 | acpi_os_wait_events_complete(); | |
a8d46b9e RW |
983 | return 0; |
984 | } | |
985 | ||
23d5855f | 986 | static void acpi_s2idle_wake(void) |
33e4f80e | 987 | { |
7edcbbf2 RW |
988 | if (!lps0_device_handle) |
989 | return; | |
726fb6b4 SP |
990 | |
991 | if (pm_debug_messages_on) | |
992 | lpi_check_constraints(); | |
993 | ||
33e4f80e RW |
994 | /* |
995 | * If IRQD_WAKEUP_ARMED is not set for the SCI at this point, it means | |
996 | * that the SCI has triggered while suspended, so cancel the wakeup in | |
997 | * case it has not been a wakeup event (the GPEs will be checked later). | |
998 | */ | |
999 | if (acpi_sci_irq_valid() && | |
1000 | !irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq))) { | |
1001 | pm_system_cancel_wakeup(); | |
1002 | s2idle_wakeup = true; | |
68e22011 RW |
1003 | /* |
1004 | * On some platforms with the LPS0 _DSM device noirq resume | |
1005 | * takes too much time for EC wakeup events to survive, so look | |
1006 | * for them now. | |
1007 | */ | |
7edcbbf2 | 1008 | acpi_ec_dispatch_gpe(); |
33e4f80e RW |
1009 | } |
1010 | } | |
1011 | ||
23d5855f | 1012 | static void acpi_s2idle_sync(void) |
33e4f80e RW |
1013 | { |
1014 | /* | |
1015 | * Process all pending events in case there are any wakeup ones. | |
1016 | * | |
880a6627 RW |
1017 | * The EC driver uses the system workqueue and an additional special |
1018 | * one, so those need to be flushed too. | |
33e4f80e | 1019 | */ |
6f1d7c45 | 1020 | acpi_os_wait_events_complete(); /* synchronize SCI IRQ handling */ |
880a6627 | 1021 | acpi_ec_flush_work(); |
6f1d7c45 | 1022 | acpi_os_wait_events_complete(); /* synchronize Notify handling */ |
33e4f80e RW |
1023 | s2idle_wakeup = false; |
1024 | } | |
1025 | ||
23d5855f | 1026 | static void acpi_s2idle_restore(void) |
a8d46b9e | 1027 | { |
f941d3e4 RW |
1028 | acpi_enable_all_runtime_gpes(); |
1029 | ||
2f844b61 RJ |
1030 | acpi_disable_wakeup_devices(ACPI_STATE_S0); |
1031 | ||
8c01275e CY |
1032 | if (acpi_sci_irq_valid()) |
1033 | disable_irq_wake(acpi_sci_irq); | |
235d81a6 | 1034 | |
8110dd28 | 1035 | if (lps0_device_handle) { |
f941d3e4 RW |
1036 | acpi_ec_set_gpe_wake_mask(ACPI_GPE_DISABLE); |
1037 | ||
8110dd28 RW |
1038 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT); |
1039 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON); | |
8110dd28 | 1040 | } |
a8d46b9e RW |
1041 | } |
1042 | ||
23d5855f | 1043 | static void acpi_s2idle_end(void) |
1f0b6386 | 1044 | { |
8110dd28 | 1045 | s2idle_in_progress = false; |
1f0b6386 RW |
1046 | acpi_scan_lock_release(); |
1047 | } | |
1048 | ||
23d5855f RW |
1049 | static const struct platform_s2idle_ops acpi_s2idle_ops = { |
1050 | .begin = acpi_s2idle_begin, | |
1051 | .prepare = acpi_s2idle_prepare, | |
1052 | .wake = acpi_s2idle_wake, | |
1053 | .sync = acpi_s2idle_sync, | |
1054 | .restore = acpi_s2idle_restore, | |
1055 | .end = acpi_s2idle_end, | |
1f0b6386 RW |
1056 | }; |
1057 | ||
02040f0b RW |
1058 | static void acpi_sleep_suspend_setup(void) |
1059 | { | |
1060 | int i; | |
1061 | ||
a4e90bed RW |
1062 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) |
1063 | if (acpi_sleep_state_supported(i)) | |
02040f0b | 1064 | sleep_states[i] = 1; |
02040f0b RW |
1065 | |
1066 | suspend_set_ops(old_suspend_ordering ? | |
1067 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
8110dd28 RW |
1068 | |
1069 | acpi_scan_add_handler(&lps0_handler); | |
23d5855f | 1070 | s2idle_set_ops(&acpi_s2idle_ops); |
02040f0b | 1071 | } |
1f0b6386 | 1072 | |
02040f0b | 1073 | #else /* !CONFIG_SUSPEND */ |
8110dd28 RW |
1074 | #define s2idle_in_progress (false) |
1075 | #define s2idle_wakeup (false) | |
1076 | #define lps0_device_handle (NULL) | |
02040f0b RW |
1077 | static inline void acpi_sleep_suspend_setup(void) {} |
1078 | #endif /* !CONFIG_SUSPEND */ | |
296699de | 1079 | |
33e4f80e RW |
1080 | bool acpi_s2idle_wakeup(void) |
1081 | { | |
1082 | return s2idle_wakeup; | |
1083 | } | |
1084 | ||
8110dd28 RW |
1085 | bool acpi_sleep_no_ec_events(void) |
1086 | { | |
1087 | return !s2idle_in_progress || !lps0_device_handle; | |
1088 | } | |
1089 | ||
504997cf SH |
1090 | #ifdef CONFIG_PM_SLEEP |
1091 | static u32 saved_bm_rld; | |
1092 | ||
1093 | static int acpi_save_bm_rld(void) | |
1094 | { | |
1095 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld); | |
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | static void acpi_restore_bm_rld(void) | |
1100 | { | |
1101 | u32 resumed_bm_rld = 0; | |
1102 | ||
1103 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld); | |
1104 | if (resumed_bm_rld == saved_bm_rld) | |
1105 | return; | |
1106 | ||
1107 | acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld); | |
1108 | } | |
1109 | ||
1110 | static struct syscore_ops acpi_sleep_syscore_ops = { | |
1111 | .suspend = acpi_save_bm_rld, | |
1112 | .resume = acpi_restore_bm_rld, | |
1113 | }; | |
1114 | ||
a042e0c6 | 1115 | static void acpi_sleep_syscore_init(void) |
504997cf SH |
1116 | { |
1117 | register_syscore_ops(&acpi_sleep_syscore_ops); | |
1118 | } | |
1119 | #else | |
1120 | static inline void acpi_sleep_syscore_init(void) {} | |
1121 | #endif /* CONFIG_PM_SLEEP */ | |
1122 | ||
b0cb1a19 | 1123 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
1124 | static unsigned long s4_hardware_signature; |
1125 | static struct acpi_table_facs *facs; | |
1126 | static bool nosigcheck; | |
1127 | ||
1128 | void __init acpi_no_s4_hw_signature(void) | |
1129 | { | |
1130 | nosigcheck = true; | |
1131 | } | |
1132 | ||
bb186901 | 1133 | static int acpi_hibernation_begin(pm_message_t stage) |
74f270af | 1134 | { |
bb186901 RW |
1135 | if (!nvs_nosave) { |
1136 | int error = suspend_nvs_alloc(); | |
1137 | if (error) | |
1138 | return error; | |
1139 | } | |
3f4b0ef7 | 1140 | |
bb186901 RW |
1141 | if (stage.event == PM_EVENT_HIBERNATE) |
1142 | pm_set_suspend_via_firmware(); | |
3f4b0ef7 | 1143 | |
bb186901 RW |
1144 | acpi_pm_start(ACPI_STATE_S4); |
1145 | return 0; | |
3f4b0ef7 RW |
1146 | } |
1147 | ||
a3d25c27 RW |
1148 | static int acpi_hibernation_enter(void) |
1149 | { | |
1150 | acpi_status status = AE_OK; | |
a3d25c27 RW |
1151 | |
1152 | ACPI_FLUSH_CPU_CACHE(); | |
1153 | ||
a3d25c27 | 1154 | /* This shouldn't return. If it returns, we have a problem */ |
3f6f49c7 LB |
1155 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
1156 | /* Reprogram control registers */ | |
1157 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
1158 | |
1159 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
1160 | } | |
1161 | ||
c7e0831d RW |
1162 | static void acpi_hibernation_leave(void) |
1163 | { | |
fbda4b38 | 1164 | pm_set_resume_via_firmware(); |
c7e0831d RW |
1165 | /* |
1166 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
1167 | * enable it here. | |
1168 | */ | |
1169 | acpi_enable(); | |
3f6f49c7 LB |
1170 | /* Reprogram control registers */ |
1171 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c | 1172 | /* Check the hardware signature */ |
5c551e62 ON |
1173 | if (facs && s4_hardware_signature != facs->hardware_signature) |
1174 | pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n"); | |
3f4b0ef7 | 1175 | /* Restore the NVS memory area */ |
dd4c4f17 | 1176 | suspend_nvs_restore(); |
d5a64513 | 1177 | /* Allow EC transactions to happen. */ |
c2b46d67 | 1178 | acpi_ec_unblock_transactions(); |
c7e0831d RW |
1179 | } |
1180 | ||
d5a64513 | 1181 | static void acpi_pm_thaw(void) |
f6bb13aa | 1182 | { |
fe955682 | 1183 | acpi_ec_unblock_transactions(); |
3d97e426 | 1184 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
1185 | } |
1186 | ||
073ef1f6 | 1187 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
1188 | .begin = acpi_hibernation_begin, |
1189 | .end = acpi_pm_end, | |
c5f7a1bb | 1190 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 1191 | .finish = acpi_pm_finish, |
d8f3de0d RW |
1192 | .prepare = acpi_pm_prepare, |
1193 | .enter = acpi_hibernation_enter, | |
1194 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
1195 | .pre_restore = acpi_pm_freeze, |
1196 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 1197 | }; |
caea99ef | 1198 | |
d8f3de0d RW |
1199 | /** |
1200 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
1201 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
1202 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
1203 | * requested. | |
1204 | */ | |
bb186901 | 1205 | static int acpi_hibernation_begin_old(pm_message_t stage) |
a634cc10 | 1206 | { |
e49f711c ZY |
1207 | int error; |
1208 | /* | |
1209 | * The _TTS object should always be evaluated before the _PTS object. | |
1210 | * When the old_suspended_ordering is true, the _PTS object is | |
1211 | * evaluated in the acpi_sleep_prepare. | |
1212 | */ | |
1213 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
1214 | ||
1215 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
bb186901 RW |
1216 | if (error) |
1217 | return error; | |
a634cc10 | 1218 | |
bb186901 RW |
1219 | if (!nvs_nosave) { |
1220 | error = suspend_nvs_alloc(); | |
1221 | if (error) | |
1222 | return error; | |
3f4b0ef7 | 1223 | } |
bb186901 RW |
1224 | |
1225 | if (stage.event == PM_EVENT_HIBERNATE) | |
1226 | pm_set_suspend_via_firmware(); | |
1227 | ||
1228 | acpi_target_sleep_state = ACPI_STATE_S4; | |
1229 | acpi_scan_lock_acquire(); | |
1230 | return 0; | |
3f4b0ef7 RW |
1231 | } |
1232 | ||
d8f3de0d RW |
1233 | /* |
1234 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
1235 | * been requested. | |
1236 | */ | |
073ef1f6 | 1237 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
1238 | .begin = acpi_hibernation_begin_old, |
1239 | .end = acpi_pm_end, | |
c5f7a1bb | 1240 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 1241 | .prepare = acpi_pm_freeze, |
2a6b6976 | 1242 | .finish = acpi_pm_finish, |
a3d25c27 | 1243 | .enter = acpi_hibernation_enter, |
c7e0831d | 1244 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
1245 | .pre_restore = acpi_pm_freeze, |
1246 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 1247 | .recover = acpi_pm_finish, |
a3d25c27 | 1248 | }; |
02040f0b RW |
1249 | |
1250 | static void acpi_sleep_hibernate_setup(void) | |
1251 | { | |
a4e90bed | 1252 | if (!acpi_sleep_state_supported(ACPI_STATE_S4)) |
02040f0b RW |
1253 | return; |
1254 | ||
1255 | hibernation_set_ops(old_suspend_ordering ? | |
1256 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
1257 | sleep_states[ACPI_STATE_S4] = 1; | |
02040f0b RW |
1258 | if (nosigcheck) |
1259 | return; | |
1260 | ||
1261 | acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); | |
1262 | if (facs) | |
1263 | s4_hardware_signature = facs->hardware_signature; | |
1264 | } | |
1265 | #else /* !CONFIG_HIBERNATION */ | |
1266 | static inline void acpi_sleep_hibernate_setup(void) {} | |
1267 | #endif /* !CONFIG_HIBERNATION */ | |
a3d25c27 | 1268 | |
f216cc37 AS |
1269 | static void acpi_power_off_prepare(void) |
1270 | { | |
1271 | /* Prepare to power off the system */ | |
1272 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 1273 | acpi_disable_all_gpes(); |
c52fa70c | 1274 | acpi_os_wait_events_complete(); |
f216cc37 AS |
1275 | } |
1276 | ||
1277 | static void acpi_power_off(void) | |
1278 | { | |
1279 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 1280 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 1281 | local_irq_disable(); |
3f6f49c7 | 1282 | acpi_enter_sleep_state(ACPI_STATE_S5); |
96f15efc LB |
1283 | } |
1284 | ||
aafbcd16 | 1285 | int __init acpi_sleep_init(void) |
1da177e4 | 1286 | { |
ed4cf5b2 JP |
1287 | char supported[ACPI_S_STATE_COUNT * 3 + 1]; |
1288 | char *pos = supported; | |
1289 | int i; | |
1da177e4 | 1290 | |
0ac1b1d7 ZR |
1291 | acpi_sleep_dmi_check(); |
1292 | ||
5a50fe70 | 1293 | sleep_states[ACPI_STATE_S0] = 1; |
5a50fe70 | 1294 | |
504997cf | 1295 | acpi_sleep_syscore_init(); |
02040f0b RW |
1296 | acpi_sleep_suspend_setup(); |
1297 | acpi_sleep_hibernate_setup(); | |
1da177e4 | 1298 | |
a4e90bed | 1299 | if (acpi_sleep_state_supported(ACPI_STATE_S5)) { |
f216cc37 | 1300 | sleep_states[ACPI_STATE_S5] = 1; |
f216cc37 AS |
1301 | pm_power_off_prepare = acpi_power_off_prepare; |
1302 | pm_power_off = acpi_power_off; | |
13737181 CY |
1303 | } else { |
1304 | acpi_no_s5 = true; | |
f216cc37 | 1305 | } |
ed4cf5b2 JP |
1306 | |
1307 | supported[0] = 0; | |
1308 | for (i = 0; i < ACPI_S_STATE_COUNT; i++) { | |
1309 | if (sleep_states[i]) | |
1310 | pos += sprintf(pos, " S%d", i); | |
1311 | } | |
1312 | pr_info(PREFIX "(supports%s)\n", supported); | |
1313 | ||
e49f711c | 1314 | /* |
9713adc2 RW |
1315 | * Register the tts_notifier to reboot notifier list so that the _TTS |
1316 | * object can also be evaluated when the system enters S5. | |
e49f711c | 1317 | */ |
9713adc2 | 1318 | register_reboot_notifier(&tts_notifier); |
1da177e4 LT |
1319 | return 0; |
1320 | } |