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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * sleep.c - ACPI sleep support. | |
3 | * | |
e2a5b420 | 4 | * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> |
1da177e4 LT |
5 | * Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com> |
6 | * Copyright (c) 2000-2003 Patrick Mochel | |
7 | * Copyright (c) 2003 Open Source Development Lab | |
8 | * | |
9 | * This file is released under the GPLv2. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/delay.h> | |
14 | #include <linux/irq.h> | |
15 | #include <linux/dmi.h> | |
16 | #include <linux/device.h> | |
17 | #include <linux/suspend.h> | |
e49f711c | 18 | #include <linux/reboot.h> |
d1ee4335 | 19 | #include <linux/acpi.h> |
a2ef5c4f | 20 | #include <linux/module.h> |
f216cc37 AS |
21 | |
22 | #include <asm/io.h> | |
23 | ||
1da177e4 LT |
24 | #include <acpi/acpi_bus.h> |
25 | #include <acpi/acpi_drivers.h> | |
e60cc7a6 BH |
26 | |
27 | #include "internal.h" | |
1da177e4 LT |
28 | #include "sleep.h" |
29 | ||
01eac60b | 30 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
1da177e4 | 31 | |
e49f711c ZY |
32 | static void acpi_sleep_tts_switch(u32 acpi_state) |
33 | { | |
34 | union acpi_object in_arg = { ACPI_TYPE_INTEGER }; | |
35 | struct acpi_object_list arg_list = { 1, &in_arg }; | |
36 | acpi_status status = AE_OK; | |
37 | ||
38 | in_arg.integer.value = acpi_state; | |
39 | status = acpi_evaluate_object(NULL, "\\_TTS", &arg_list, NULL); | |
40 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
41 | /* | |
42 | * OS can't evaluate the _TTS object correctly. Some warning | |
43 | * message will be printed. But it won't break anything. | |
44 | */ | |
45 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); | |
46 | } | |
47 | } | |
48 | ||
49 | static int tts_notify_reboot(struct notifier_block *this, | |
50 | unsigned long code, void *x) | |
51 | { | |
52 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
53 | return NOTIFY_DONE; | |
54 | } | |
55 | ||
56 | static struct notifier_block tts_notifier = { | |
57 | .notifier_call = tts_notify_reboot, | |
58 | .next = NULL, | |
59 | .priority = 0, | |
60 | }; | |
61 | ||
c9b6c8f6 | 62 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
63 | { |
64 | #ifdef CONFIG_ACPI_SLEEP | |
65 | /* do we have a wakeup address for S2 and S3? */ | |
66 | if (acpi_state == ACPI_STATE_S3) { | |
319b6ffc | 67 | if (!acpi_wakeup_address) |
2f3f2226 | 68 | return -EFAULT; |
319b6ffc | 69 | acpi_set_firmware_waking_vector(acpi_wakeup_address); |
2f3f2226 AS |
70 | |
71 | } | |
72 | ACPI_FLUSH_CPU_CACHE(); | |
2f3f2226 | 73 | #endif |
c9b6c8f6 RW |
74 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
75 | acpi_state); | |
78f5f023 | 76 | acpi_enable_wakeup_devices(acpi_state); |
2f3f2226 AS |
77 | acpi_enter_sleep_state_prep(acpi_state); |
78 | return 0; | |
79 | } | |
80 | ||
5d1e072b | 81 | #ifdef CONFIG_ACPI_SLEEP |
091aad6a | 82 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
a6ae7594 RW |
83 | |
84 | u32 acpi_target_system_state(void) | |
85 | { | |
86 | return acpi_target_sleep_state; | |
87 | } | |
88 | ||
a5ca7345 | 89 | static bool pwr_btn_event_pending; |
091aad6a | 90 | |
72ad5d77 RW |
91 | /* |
92 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
93 | * and to restore them during the subsequent resume. Windows does that also for | |
94 | * suspend to RAM. However, it is known that this mechanism does not work on | |
95 | * all machines, so we allow the user to disable it with the help of the | |
96 | * 'acpi_sleep=nonvs' kernel command line option. | |
97 | */ | |
98 | static bool nvs_nosave; | |
99 | ||
100 | void __init acpi_nvs_nosave(void) | |
101 | { | |
102 | nvs_nosave = true; | |
103 | } | |
104 | ||
1bad2f19 KCA |
105 | /* |
106 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
107 | * but says nothing about saving NVS during S3. Not all versions of Windows | |
108 | * save NVS on S3 suspend either, and it is clear that not all systems need | |
109 | * NVS to be saved at S3 time. To improve suspend/resume time, allow the | |
110 | * user to disable saving NVS on S3 if their system does not require it, but | |
111 | * continue to save/restore NVS for S4 as specified. | |
112 | */ | |
113 | static bool nvs_nosave_s3; | |
114 | ||
115 | void __init acpi_nvs_nosave_s3(void) | |
116 | { | |
117 | nvs_nosave_s3 = true; | |
118 | } | |
119 | ||
d8f3de0d RW |
120 | /* |
121 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
122 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
123 | * kernel command line option that causes the following variable to be set. | |
124 | */ | |
125 | static bool old_suspend_ordering; | |
126 | ||
127 | void __init acpi_old_suspend_ordering(void) | |
128 | { | |
129 | old_suspend_ordering = true; | |
130 | } | |
131 | ||
0ac1b1d7 ZR |
132 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
133 | { | |
134 | acpi_old_suspend_ordering(); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static int __init init_nvs_nosave(const struct dmi_system_id *d) | |
139 | { | |
140 | acpi_nvs_nosave(); | |
141 | return 0; | |
142 | } | |
143 | ||
144 | static struct dmi_system_id __initdata acpisleep_dmi_table[] = { | |
145 | { | |
146 | .callback = init_old_suspend_ordering, | |
147 | .ident = "Abit KN9 (nForce4 variant)", | |
148 | .matches = { | |
149 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
150 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
151 | }, | |
152 | }, | |
153 | { | |
154 | .callback = init_old_suspend_ordering, | |
155 | .ident = "HP xw4600 Workstation", | |
156 | .matches = { | |
157 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
158 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
159 | }, | |
160 | }, | |
161 | { | |
162 | .callback = init_old_suspend_ordering, | |
163 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
164 | .matches = { | |
165 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
166 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
167 | }, | |
168 | }, | |
169 | { | |
170 | .callback = init_old_suspend_ordering, | |
171 | .ident = "Panasonic CF51-2L", | |
172 | .matches = { | |
173 | DMI_MATCH(DMI_BOARD_VENDOR, | |
174 | "Matsushita Electric Industrial Co.,Ltd."), | |
175 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
176 | }, | |
177 | }, | |
178 | { | |
179 | .callback = init_nvs_nosave, | |
180 | .ident = "Sony Vaio VGN-FW21E", | |
181 | .matches = { | |
182 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
183 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
184 | }, | |
185 | }, | |
186 | { | |
187 | .callback = init_nvs_nosave, | |
188 | .ident = "Sony Vaio VPCEB17FX", | |
189 | .matches = { | |
190 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
191 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
192 | }, | |
193 | }, | |
194 | { | |
195 | .callback = init_nvs_nosave, | |
196 | .ident = "Sony Vaio VGN-SR11M", | |
197 | .matches = { | |
198 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
199 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
200 | }, | |
201 | }, | |
202 | { | |
203 | .callback = init_nvs_nosave, | |
204 | .ident = "Everex StepNote Series", | |
205 | .matches = { | |
206 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
207 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
208 | }, | |
209 | }, | |
210 | { | |
211 | .callback = init_nvs_nosave, | |
212 | .ident = "Sony Vaio VPCEB1Z1E", | |
213 | .matches = { | |
214 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
215 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
216 | }, | |
217 | }, | |
218 | { | |
219 | .callback = init_nvs_nosave, | |
220 | .ident = "Sony Vaio VGN-NW130D", | |
221 | .matches = { | |
222 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
223 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
224 | }, | |
225 | }, | |
226 | { | |
227 | .callback = init_nvs_nosave, | |
228 | .ident = "Sony Vaio VPCCW29FX", | |
229 | .matches = { | |
230 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
231 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
232 | }, | |
233 | }, | |
234 | { | |
235 | .callback = init_nvs_nosave, | |
236 | .ident = "Averatec AV1020-ED2", | |
237 | .matches = { | |
238 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
239 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
240 | }, | |
241 | }, | |
242 | { | |
243 | .callback = init_old_suspend_ordering, | |
244 | .ident = "Asus A8N-SLI DELUXE", | |
245 | .matches = { | |
246 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
247 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
248 | }, | |
249 | }, | |
250 | { | |
251 | .callback = init_old_suspend_ordering, | |
252 | .ident = "Asus A8N-SLI Premium", | |
253 | .matches = { | |
254 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
255 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
256 | }, | |
257 | }, | |
258 | { | |
259 | .callback = init_nvs_nosave, | |
260 | .ident = "Sony Vaio VGN-SR26GN_P", | |
261 | .matches = { | |
262 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
263 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
264 | }, | |
265 | }, | |
266 | { | |
267 | .callback = init_nvs_nosave, | |
268 | .ident = "Sony Vaio VPCEB1S1E", | |
269 | .matches = { | |
270 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
271 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), | |
272 | }, | |
273 | }, | |
274 | { | |
275 | .callback = init_nvs_nosave, | |
276 | .ident = "Sony Vaio VGN-FW520F", | |
277 | .matches = { | |
278 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
279 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
280 | }, | |
281 | }, | |
282 | { | |
283 | .callback = init_nvs_nosave, | |
284 | .ident = "Asus K54C", | |
285 | .matches = { | |
286 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
287 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
288 | }, | |
289 | }, | |
290 | { | |
291 | .callback = init_nvs_nosave, | |
292 | .ident = "Asus K54HR", | |
293 | .matches = { | |
294 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
295 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
296 | }, | |
297 | }, | |
298 | {}, | |
299 | }; | |
300 | ||
301 | static void acpi_sleep_dmi_check(void) | |
302 | { | |
303 | dmi_check_system(acpisleep_dmi_table); | |
304 | } | |
305 | ||
d8f3de0d | 306 | /** |
d5a64513 | 307 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 308 | */ |
d5a64513 | 309 | static int acpi_pm_freeze(void) |
d8f3de0d | 310 | { |
3d97e426 | 311 | acpi_disable_all_gpes(); |
bd6f10a5 | 312 | acpi_os_wait_events_complete(); |
fe955682 | 313 | acpi_ec_block_transactions(); |
d8f3de0d RW |
314 | return 0; |
315 | } | |
316 | ||
c5f7a1bb RW |
317 | /** |
318 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
319 | */ | |
320 | static int acpi_pm_pre_suspend(void) | |
321 | { | |
322 | acpi_pm_freeze(); | |
26fcaf60 | 323 | return suspend_nvs_save(); |
c5f7a1bb RW |
324 | } |
325 | ||
d8f3de0d RW |
326 | /** |
327 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
328 | * | |
329 | * If necessary, set the firmware waking vector and do arch-specific | |
330 | * nastiness to get the wakeup code to the waking vector. | |
331 | */ | |
332 | static int __acpi_pm_prepare(void) | |
333 | { | |
334 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
335 | if (error) |
336 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 337 | |
d8f3de0d RW |
338 | return error; |
339 | } | |
340 | ||
341 | /** | |
342 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
343 | * state and disable the GPEs. | |
344 | */ | |
345 | static int acpi_pm_prepare(void) | |
346 | { | |
347 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 348 | if (!error) |
26fcaf60 | 349 | error = acpi_pm_pre_suspend(); |
d5a64513 | 350 | |
d8f3de0d RW |
351 | return error; |
352 | } | |
353 | ||
c10d7a13 DD |
354 | static int find_powerf_dev(struct device *dev, void *data) |
355 | { | |
356 | struct acpi_device *device = to_acpi_device(dev); | |
357 | const char *hid = acpi_device_hid(device); | |
358 | ||
359 | return !strcmp(hid, ACPI_BUTTON_HID_POWERF); | |
360 | } | |
361 | ||
d8f3de0d RW |
362 | /** |
363 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
364 | * | |
365 | * This is called after we wake back up (or if entering the sleep state | |
366 | * failed). | |
367 | */ | |
368 | static void acpi_pm_finish(void) | |
369 | { | |
c10d7a13 | 370 | struct device *pwr_btn_dev; |
d8f3de0d RW |
371 | u32 acpi_state = acpi_target_sleep_state; |
372 | ||
42de5532 | 373 | acpi_ec_unblock_transactions(); |
d551d81d | 374 | suspend_nvs_free(); |
2a6b6976 | 375 | |
d8f3de0d RW |
376 | if (acpi_state == ACPI_STATE_S0) |
377 | return; | |
1da177e4 | 378 | |
d8f3de0d RW |
379 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
380 | acpi_state); | |
78f5f023 | 381 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
382 | acpi_leave_sleep_state(acpi_state); |
383 | ||
384 | /* reset firmware waking vector */ | |
385 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
386 | ||
387 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c10d7a13 DD |
388 | |
389 | /* If we were woken with the fixed power button, provide a small | |
390 | * hint to userspace in the form of a wakeup event on the fixed power | |
391 | * button device (if it can be found). | |
392 | * | |
393 | * We delay the event generation til now, as the PM layer requires | |
394 | * timekeeping to be running before we generate events. */ | |
395 | if (!pwr_btn_event_pending) | |
396 | return; | |
397 | ||
398 | pwr_btn_event_pending = false; | |
399 | pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, | |
400 | find_powerf_dev); | |
401 | if (pwr_btn_dev) { | |
402 | pm_wakeup_event(pwr_btn_dev, 0); | |
403 | put_device(pwr_btn_dev); | |
404 | } | |
d8f3de0d RW |
405 | } |
406 | ||
407 | /** | |
408 | * acpi_pm_end - Finish up suspend sequence. | |
409 | */ | |
410 | static void acpi_pm_end(void) | |
411 | { | |
412 | /* | |
413 | * This is necessary in case acpi_pm_finish() is not called during a | |
414 | * failing transition to a sleep state. | |
415 | */ | |
416 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 417 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 418 | } |
92daa7b5 RW |
419 | #else /* !CONFIG_ACPI_SLEEP */ |
420 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
0ac1b1d7 | 421 | static inline void acpi_sleep_dmi_check(void) {} |
5d1e072b | 422 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 423 | |
d8f3de0d | 424 | #ifdef CONFIG_SUSPEND |
1da177e4 | 425 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
426 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
427 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
428 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 429 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
430 | }; |
431 | ||
e9b3aba8 | 432 | /** |
2c6e33c3 | 433 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
434 | * associated with given @pm_state, if supported. |
435 | */ | |
2c6e33c3 | 436 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
437 | { |
438 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
439 | int error = 0; | |
440 | ||
1bad2f19 | 441 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
442 | if (error) |
443 | return error; | |
444 | ||
e9b3aba8 RW |
445 | if (sleep_states[acpi_state]) { |
446 | acpi_target_sleep_state = acpi_state; | |
e49f711c | 447 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
e9b3aba8 RW |
448 | } else { |
449 | printk(KERN_ERR "ACPI does not support this state: %d\n", | |
450 | pm_state); | |
451 | error = -ENOSYS; | |
452 | } | |
453 | return error; | |
454 | } | |
455 | ||
1da177e4 | 456 | /** |
2c6e33c3 | 457 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 458 | * @pm_state: ignored |
1da177e4 | 459 | * |
50ad147a RW |
460 | * Flush caches and go to sleep. For STR we have to call arch-specific |
461 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
462 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
463 | */ | |
2c6e33c3 | 464 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
465 | { |
466 | acpi_status status = AE_OK; | |
e9b3aba8 | 467 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 468 | int error; |
1da177e4 LT |
469 | |
470 | ACPI_FLUSH_CPU_CACHE(); | |
471 | ||
e9b3aba8 RW |
472 | switch (acpi_state) { |
473 | case ACPI_STATE_S1: | |
1da177e4 | 474 | barrier(); |
3f6f49c7 | 475 | status = acpi_enter_sleep_state(acpi_state); |
1da177e4 LT |
476 | break; |
477 | ||
e9b3aba8 | 478 | case ACPI_STATE_S3: |
f1a2003e | 479 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
480 | if (error) |
481 | return error; | |
7a63f08b | 482 | pr_info(PREFIX "Low-level resume complete\n"); |
1da177e4 | 483 | break; |
1da177e4 | 484 | } |
872d83d0 | 485 | |
b6dacf63 MG |
486 | /* This violates the spec but is required for bug compatibility. */ |
487 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 488 | |
3f6f49c7 LB |
489 | /* Reprogram control registers */ |
490 | acpi_leave_sleep_state_prep(acpi_state); | |
c95d47a8 | 491 | |
23b168d4 | 492 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
493 | * of the OSPM to clear the status bit [ implying that the |
494 | * POWER_BUTTON event should not reach userspace ] | |
c10d7a13 DD |
495 | * |
496 | * However, we do generate a small hint for userspace in the form of | |
497 | * a wakeup event. We flag this condition for now and generate the | |
498 | * event later, as we're currently too early in resume to be able to | |
499 | * generate wakeup events. | |
872d83d0 | 500 | */ |
c10d7a13 DD |
501 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
502 | acpi_event_status pwr_btn_status; | |
503 | ||
504 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); | |
505 | ||
506 | if (pwr_btn_status & ACPI_EVENT_FLAG_SET) { | |
507 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
508 | /* Flag for later */ | |
509 | pwr_btn_event_pending = true; | |
510 | } | |
511 | } | |
872d83d0 | 512 | |
a3627f67 SL |
513 | /* |
514 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
515 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
516 | * acpi_leave_sleep_state will reenable specific GPEs later | |
517 | */ | |
3d97e426 | 518 | acpi_disable_all_gpes(); |
d5a64513 | 519 | /* Allow EC transactions to happen. */ |
fe955682 | 520 | acpi_ec_unblock_transactions_early(); |
a3627f67 | 521 | |
2a6b6976 MG |
522 | suspend_nvs_restore(); |
523 | ||
1da177e4 LT |
524 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
525 | } | |
526 | ||
2c6e33c3 | 527 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 528 | { |
e8c9c502 | 529 | u32 acpi_state; |
eb9289eb | 530 | |
e8c9c502 JB |
531 | switch (pm_state) { |
532 | case PM_SUSPEND_ON: | |
533 | case PM_SUSPEND_STANDBY: | |
534 | case PM_SUSPEND_MEM: | |
535 | acpi_state = acpi_suspend_states[pm_state]; | |
536 | ||
537 | return sleep_states[acpi_state]; | |
538 | default: | |
539 | return 0; | |
540 | } | |
eb9289eb SL |
541 | } |
542 | ||
2f55ac07 | 543 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
544 | .valid = acpi_suspend_state_valid, |
545 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 546 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 547 | .enter = acpi_suspend_enter, |
618d7fd0 | 548 | .wake = acpi_pm_finish, |
d8f3de0d RW |
549 | .end = acpi_pm_end, |
550 | }; | |
551 | ||
552 | /** | |
553 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
554 | * state associated with given @pm_state, if supported, and | |
555 | * execute the _PTS control method. This function is used if the | |
556 | * pre-ACPI 2.0 suspend ordering has been requested. | |
557 | */ | |
558 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
559 | { | |
560 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
561 | if (!error) |
562 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 563 | |
d8f3de0d RW |
564 | return error; |
565 | } | |
566 | ||
567 | /* | |
568 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
569 | * been requested. | |
570 | */ | |
2f55ac07 | 571 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
572 | .valid = acpi_suspend_state_valid, |
573 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 574 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 575 | .enter = acpi_suspend_enter, |
618d7fd0 | 576 | .wake = acpi_pm_finish, |
d8f3de0d RW |
577 | .end = acpi_pm_end, |
578 | .recover = acpi_pm_finish, | |
1da177e4 | 579 | }; |
296699de RW |
580 | #endif /* CONFIG_SUSPEND */ |
581 | ||
b0cb1a19 | 582 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
583 | static unsigned long s4_hardware_signature; |
584 | static struct acpi_table_facs *facs; | |
585 | static bool nosigcheck; | |
586 | ||
587 | void __init acpi_no_s4_hw_signature(void) | |
588 | { | |
589 | nosigcheck = true; | |
590 | } | |
591 | ||
caea99ef | 592 | static int acpi_hibernation_begin(void) |
74f270af | 593 | { |
3f4b0ef7 RW |
594 | int error; |
595 | ||
72ad5d77 | 596 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
3f4b0ef7 RW |
597 | if (!error) { |
598 | acpi_target_sleep_state = ACPI_STATE_S4; | |
599 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
600 | } | |
601 | ||
602 | return error; | |
603 | } | |
604 | ||
a3d25c27 RW |
605 | static int acpi_hibernation_enter(void) |
606 | { | |
607 | acpi_status status = AE_OK; | |
a3d25c27 RW |
608 | |
609 | ACPI_FLUSH_CPU_CACHE(); | |
610 | ||
a3d25c27 | 611 | /* This shouldn't return. If it returns, we have a problem */ |
3f6f49c7 LB |
612 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
613 | /* Reprogram control registers */ | |
614 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
615 | |
616 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
617 | } | |
618 | ||
c7e0831d RW |
619 | static void acpi_hibernation_leave(void) |
620 | { | |
621 | /* | |
622 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
623 | * enable it here. | |
624 | */ | |
625 | acpi_enable(); | |
3f6f49c7 LB |
626 | /* Reprogram control registers */ |
627 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c SL |
628 | /* Check the hardware signature */ |
629 | if (facs && s4_hardware_signature != facs->hardware_signature) { | |
630 | printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " | |
631 | "cannot resume!\n"); | |
632 | panic("ACPI S4 hardware signature mismatch"); | |
633 | } | |
3f4b0ef7 | 634 | /* Restore the NVS memory area */ |
dd4c4f17 | 635 | suspend_nvs_restore(); |
d5a64513 | 636 | /* Allow EC transactions to happen. */ |
fe955682 | 637 | acpi_ec_unblock_transactions_early(); |
c7e0831d RW |
638 | } |
639 | ||
d5a64513 | 640 | static void acpi_pm_thaw(void) |
f6bb13aa | 641 | { |
fe955682 | 642 | acpi_ec_unblock_transactions(); |
3d97e426 | 643 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
644 | } |
645 | ||
073ef1f6 | 646 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
647 | .begin = acpi_hibernation_begin, |
648 | .end = acpi_pm_end, | |
c5f7a1bb | 649 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 650 | .finish = acpi_pm_finish, |
d8f3de0d RW |
651 | .prepare = acpi_pm_prepare, |
652 | .enter = acpi_hibernation_enter, | |
653 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
654 | .pre_restore = acpi_pm_freeze, |
655 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 656 | }; |
caea99ef | 657 | |
d8f3de0d RW |
658 | /** |
659 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
660 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
661 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
662 | * requested. | |
663 | */ | |
664 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 665 | { |
e49f711c ZY |
666 | int error; |
667 | /* | |
668 | * The _TTS object should always be evaluated before the _PTS object. | |
669 | * When the old_suspended_ordering is true, the _PTS object is | |
670 | * evaluated in the acpi_sleep_prepare. | |
671 | */ | |
672 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
673 | ||
674 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 675 | |
3f4b0ef7 | 676 | if (!error) { |
72ad5d77 | 677 | if (!nvs_nosave) |
dd4c4f17 | 678 | error = suspend_nvs_alloc(); |
3f4b0ef7 RW |
679 | if (!error) |
680 | acpi_target_sleep_state = ACPI_STATE_S4; | |
681 | } | |
682 | return error; | |
683 | } | |
684 | ||
d8f3de0d RW |
685 | /* |
686 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
687 | * been requested. | |
688 | */ | |
073ef1f6 | 689 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
690 | .begin = acpi_hibernation_begin_old, |
691 | .end = acpi_pm_end, | |
c5f7a1bb | 692 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 693 | .prepare = acpi_pm_freeze, |
2a6b6976 | 694 | .finish = acpi_pm_finish, |
a3d25c27 | 695 | .enter = acpi_hibernation_enter, |
c7e0831d | 696 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
697 | .pre_restore = acpi_pm_freeze, |
698 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 699 | .recover = acpi_pm_finish, |
a3d25c27 | 700 | }; |
d8f3de0d | 701 | #endif /* CONFIG_HIBERNATION */ |
a3d25c27 | 702 | |
296699de RW |
703 | int acpi_suspend(u32 acpi_state) |
704 | { | |
705 | suspend_state_t states[] = { | |
706 | [1] = PM_SUSPEND_STANDBY, | |
707 | [3] = PM_SUSPEND_MEM, | |
708 | [5] = PM_SUSPEND_MAX | |
709 | }; | |
710 | ||
711 | if (acpi_state < 6 && states[acpi_state]) | |
712 | return pm_suspend(states[acpi_state]); | |
713 | if (acpi_state == 4) | |
714 | return hibernate(); | |
715 | return -EINVAL; | |
716 | } | |
717 | ||
f216cc37 AS |
718 | static void acpi_power_off_prepare(void) |
719 | { | |
720 | /* Prepare to power off the system */ | |
721 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 722 | acpi_disable_all_gpes(); |
f216cc37 AS |
723 | } |
724 | ||
725 | static void acpi_power_off(void) | |
726 | { | |
727 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 728 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 729 | local_irq_disable(); |
3f6f49c7 | 730 | acpi_enter_sleep_state(ACPI_STATE_S5); |
96f15efc LB |
731 | } |
732 | ||
aafbcd16 | 733 | int __init acpi_sleep_init(void) |
1da177e4 | 734 | { |
296699de RW |
735 | acpi_status status; |
736 | u8 type_a, type_b; | |
737 | #ifdef CONFIG_SUSPEND | |
e2a5b420 | 738 | int i = 0; |
296699de | 739 | #endif |
1da177e4 LT |
740 | |
741 | if (acpi_disabled) | |
742 | return 0; | |
743 | ||
0ac1b1d7 ZR |
744 | acpi_sleep_dmi_check(); |
745 | ||
5a50fe70 FP |
746 | sleep_states[ACPI_STATE_S0] = 1; |
747 | printk(KERN_INFO PREFIX "(supports S0"); | |
748 | ||
296699de | 749 | #ifdef CONFIG_SUSPEND |
5a50fe70 | 750 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { |
1da177e4 LT |
751 | status = acpi_get_sleep_type_data(i, &type_a, &type_b); |
752 | if (ACPI_SUCCESS(status)) { | |
753 | sleep_states[i] = 1; | |
be96447e | 754 | printk(KERN_CONT " S%d", i); |
1da177e4 | 755 | } |
1da177e4 | 756 | } |
1da177e4 | 757 | |
d8f3de0d RW |
758 | suspend_set_ops(old_suspend_ordering ? |
759 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
296699de | 760 | #endif |
a3d25c27 | 761 | |
b0cb1a19 | 762 | #ifdef CONFIG_HIBERNATION |
296699de RW |
763 | status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); |
764 | if (ACPI_SUCCESS(status)) { | |
d8f3de0d RW |
765 | hibernation_set_ops(old_suspend_ordering ? |
766 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
296699de | 767 | sleep_states[ACPI_STATE_S4] = 1; |
be96447e | 768 | printk(KERN_CONT " S4"); |
bdfe6b7c | 769 | if (!nosigcheck) { |
3d97e426 | 770 | acpi_get_table(ACPI_SIG_FACS, 1, |
bdfe6b7c SL |
771 | (struct acpi_table_header **)&facs); |
772 | if (facs) | |
773 | s4_hardware_signature = | |
774 | facs->hardware_signature; | |
775 | } | |
296699de | 776 | } |
a3d25c27 | 777 | #endif |
f216cc37 AS |
778 | status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
779 | if (ACPI_SUCCESS(status)) { | |
780 | sleep_states[ACPI_STATE_S5] = 1; | |
be96447e | 781 | printk(KERN_CONT " S5"); |
f216cc37 AS |
782 | pm_power_off_prepare = acpi_power_off_prepare; |
783 | pm_power_off = acpi_power_off; | |
784 | } | |
be96447e | 785 | printk(KERN_CONT ")\n"); |
e49f711c ZY |
786 | /* |
787 | * Register the tts_notifier to reboot notifier list so that the _TTS | |
788 | * object can also be evaluated when the system enters S5. | |
789 | */ | |
790 | register_reboot_notifier(&tts_notifier); | |
1da177e4 LT |
791 | return 0; |
792 | } |