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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> | |
f216cc37 AS |
18 | |
19 | #include <asm/io.h> | |
20 | ||
1da177e4 LT |
21 | #include <acpi/acpi_bus.h> |
22 | #include <acpi/acpi_drivers.h> | |
23 | #include "sleep.h" | |
24 | ||
25 | u8 sleep_states[ACPI_S_STATE_COUNT]; | |
26 | ||
c9b6c8f6 | 27 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
28 | { |
29 | #ifdef CONFIG_ACPI_SLEEP | |
30 | /* do we have a wakeup address for S2 and S3? */ | |
31 | if (acpi_state == ACPI_STATE_S3) { | |
32 | if (!acpi_wakeup_address) { | |
33 | return -EFAULT; | |
34 | } | |
35 | acpi_set_firmware_waking_vector((acpi_physical_address) | |
36 | virt_to_phys((void *) | |
37 | acpi_wakeup_address)); | |
38 | ||
39 | } | |
40 | ACPI_FLUSH_CPU_CACHE(); | |
41 | acpi_enable_wakeup_device_prep(acpi_state); | |
42 | #endif | |
c9b6c8f6 RW |
43 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
44 | acpi_state); | |
2f3f2226 AS |
45 | acpi_enter_sleep_state_prep(acpi_state); |
46 | return 0; | |
47 | } | |
48 | ||
d8f3de0d RW |
49 | #ifdef CONFIG_PM_SLEEP |
50 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; | |
51 | ||
52 | /* | |
53 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
54 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
55 | * kernel command line option that causes the following variable to be set. | |
56 | */ | |
57 | static bool old_suspend_ordering; | |
58 | ||
59 | void __init acpi_old_suspend_ordering(void) | |
60 | { | |
61 | old_suspend_ordering = true; | |
62 | } | |
63 | ||
64 | /** | |
65 | * acpi_pm_disable_gpes - Disable the GPEs. | |
66 | */ | |
67 | static int acpi_pm_disable_gpes(void) | |
68 | { | |
69 | acpi_hw_disable_all_gpes(); | |
70 | return 0; | |
71 | } | |
72 | ||
73 | /** | |
74 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
75 | * | |
76 | * If necessary, set the firmware waking vector and do arch-specific | |
77 | * nastiness to get the wakeup code to the waking vector. | |
78 | */ | |
79 | static int __acpi_pm_prepare(void) | |
80 | { | |
81 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
82 | ||
83 | if (error) | |
84 | acpi_target_sleep_state = ACPI_STATE_S0; | |
85 | return error; | |
86 | } | |
87 | ||
88 | /** | |
89 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
90 | * state and disable the GPEs. | |
91 | */ | |
92 | static int acpi_pm_prepare(void) | |
93 | { | |
94 | int error = __acpi_pm_prepare(); | |
95 | ||
96 | if (!error) | |
97 | acpi_hw_disable_all_gpes(); | |
98 | return error; | |
99 | } | |
100 | ||
101 | /** | |
102 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
103 | * | |
104 | * This is called after we wake back up (or if entering the sleep state | |
105 | * failed). | |
106 | */ | |
107 | static void acpi_pm_finish(void) | |
108 | { | |
109 | u32 acpi_state = acpi_target_sleep_state; | |
110 | ||
111 | if (acpi_state == ACPI_STATE_S0) | |
112 | return; | |
1da177e4 | 113 | |
d8f3de0d RW |
114 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
115 | acpi_state); | |
116 | acpi_disable_wakeup_device(acpi_state); | |
117 | acpi_leave_sleep_state(acpi_state); | |
118 | ||
119 | /* reset firmware waking vector */ | |
120 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
121 | ||
122 | acpi_target_sleep_state = ACPI_STATE_S0; | |
123 | } | |
124 | ||
125 | /** | |
126 | * acpi_pm_end - Finish up suspend sequence. | |
127 | */ | |
128 | static void acpi_pm_end(void) | |
129 | { | |
130 | /* | |
131 | * This is necessary in case acpi_pm_finish() is not called during a | |
132 | * failing transition to a sleep state. | |
133 | */ | |
134 | acpi_target_sleep_state = ACPI_STATE_S0; | |
135 | } | |
136 | #endif /* CONFIG_PM_SLEEP */ | |
137 | ||
138 | #ifdef CONFIG_SUSPEND | |
1da177e4 LT |
139 | extern void do_suspend_lowlevel(void); |
140 | ||
141 | static u32 acpi_suspend_states[] = { | |
e2a5b420 AS |
142 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
143 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
144 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 145 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
146 | }; |
147 | ||
e9b3aba8 | 148 | /** |
2c6e33c3 | 149 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
150 | * associated with given @pm_state, if supported. |
151 | */ | |
2c6e33c3 | 152 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
153 | { |
154 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
155 | int error = 0; | |
156 | ||
157 | if (sleep_states[acpi_state]) { | |
158 | acpi_target_sleep_state = acpi_state; | |
159 | } else { | |
160 | printk(KERN_ERR "ACPI does not support this state: %d\n", | |
161 | pm_state); | |
162 | error = -ENOSYS; | |
163 | } | |
164 | return error; | |
165 | } | |
166 | ||
1da177e4 | 167 | /** |
2c6e33c3 | 168 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 169 | * @pm_state: ignored |
1da177e4 | 170 | * |
50ad147a RW |
171 | * Flush caches and go to sleep. For STR we have to call arch-specific |
172 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
173 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
174 | */ | |
2c6e33c3 | 175 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
176 | { |
177 | acpi_status status = AE_OK; | |
178 | unsigned long flags = 0; | |
e9b3aba8 | 179 | u32 acpi_state = acpi_target_sleep_state; |
1da177e4 LT |
180 | |
181 | ACPI_FLUSH_CPU_CACHE(); | |
182 | ||
183 | /* Do arch specific saving of state. */ | |
50ad147a | 184 | if (acpi_state == ACPI_STATE_S3) { |
1da177e4 | 185 | int error = acpi_save_state_mem(); |
e9b3aba8 | 186 | |
60417f59 | 187 | if (error) |
1da177e4 LT |
188 | return error; |
189 | } | |
190 | ||
1da177e4 LT |
191 | local_irq_save(flags); |
192 | acpi_enable_wakeup_device(acpi_state); | |
e9b3aba8 RW |
193 | switch (acpi_state) { |
194 | case ACPI_STATE_S1: | |
1da177e4 LT |
195 | barrier(); |
196 | status = acpi_enter_sleep_state(acpi_state); | |
197 | break; | |
198 | ||
e9b3aba8 | 199 | case ACPI_STATE_S3: |
1da177e4 LT |
200 | do_suspend_lowlevel(); |
201 | break; | |
1da177e4 | 202 | } |
872d83d0 | 203 | |
c95d47a8 RW |
204 | /* Reprogram control registers and execute _BFS */ |
205 | acpi_leave_sleep_state_prep(acpi_state); | |
206 | ||
23b168d4 | 207 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
208 | * of the OSPM to clear the status bit [ implying that the |
209 | * POWER_BUTTON event should not reach userspace ] | |
210 | */ | |
211 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) | |
212 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
213 | ||
a3627f67 SL |
214 | /* |
215 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
216 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
217 | * acpi_leave_sleep_state will reenable specific GPEs later | |
218 | */ | |
219 | acpi_hw_disable_all_gpes(); | |
220 | ||
1da177e4 LT |
221 | local_irq_restore(flags); |
222 | printk(KERN_DEBUG "Back to C!\n"); | |
223 | ||
e9b3aba8 | 224 | /* restore processor state */ |
50ad147a | 225 | if (acpi_state == ACPI_STATE_S3) |
1da177e4 LT |
226 | acpi_restore_state_mem(); |
227 | ||
1da177e4 LT |
228 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
229 | } | |
230 | ||
2c6e33c3 | 231 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 232 | { |
e8c9c502 | 233 | u32 acpi_state; |
eb9289eb | 234 | |
e8c9c502 JB |
235 | switch (pm_state) { |
236 | case PM_SUSPEND_ON: | |
237 | case PM_SUSPEND_STANDBY: | |
238 | case PM_SUSPEND_MEM: | |
239 | acpi_state = acpi_suspend_states[pm_state]; | |
240 | ||
241 | return sleep_states[acpi_state]; | |
242 | default: | |
243 | return 0; | |
244 | } | |
eb9289eb SL |
245 | } |
246 | ||
2c6e33c3 LB |
247 | static struct platform_suspend_ops acpi_suspend_ops = { |
248 | .valid = acpi_suspend_state_valid, | |
249 | .begin = acpi_suspend_begin, | |
d8f3de0d RW |
250 | .prepare = acpi_pm_prepare, |
251 | .enter = acpi_suspend_enter, | |
252 | .finish = acpi_pm_finish, | |
253 | .end = acpi_pm_end, | |
254 | }; | |
255 | ||
256 | /** | |
257 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
258 | * state associated with given @pm_state, if supported, and | |
259 | * execute the _PTS control method. This function is used if the | |
260 | * pre-ACPI 2.0 suspend ordering has been requested. | |
261 | */ | |
262 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
263 | { | |
264 | int error = acpi_suspend_begin(pm_state); | |
265 | ||
266 | if (!error) | |
267 | error = __acpi_pm_prepare(); | |
268 | return error; | |
269 | } | |
270 | ||
271 | /* | |
272 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
273 | * been requested. | |
274 | */ | |
275 | static struct platform_suspend_ops acpi_suspend_ops_old = { | |
276 | .valid = acpi_suspend_state_valid, | |
277 | .begin = acpi_suspend_begin_old, | |
278 | .prepare = acpi_pm_disable_gpes, | |
2c6e33c3 | 279 | .enter = acpi_suspend_enter, |
d8f3de0d RW |
280 | .finish = acpi_pm_finish, |
281 | .end = acpi_pm_end, | |
282 | .recover = acpi_pm_finish, | |
1da177e4 | 283 | }; |
296699de RW |
284 | #endif /* CONFIG_SUSPEND */ |
285 | ||
b0cb1a19 | 286 | #ifdef CONFIG_HIBERNATION |
caea99ef | 287 | static int acpi_hibernation_begin(void) |
74f270af RW |
288 | { |
289 | acpi_target_sleep_state = ACPI_STATE_S4; | |
7731ce63 | 290 | return 0; |
74f270af RW |
291 | } |
292 | ||
a3d25c27 RW |
293 | static int acpi_hibernation_enter(void) |
294 | { | |
295 | acpi_status status = AE_OK; | |
296 | unsigned long flags = 0; | |
297 | ||
298 | ACPI_FLUSH_CPU_CACHE(); | |
299 | ||
300 | local_irq_save(flags); | |
301 | acpi_enable_wakeup_device(ACPI_STATE_S4); | |
302 | /* This shouldn't return. If it returns, we have a problem */ | |
303 | status = acpi_enter_sleep_state(ACPI_STATE_S4); | |
c95d47a8 RW |
304 | /* Reprogram control registers and execute _BFS */ |
305 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
306 | local_irq_restore(flags); |
307 | ||
308 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
309 | } | |
310 | ||
c7e0831d RW |
311 | static void acpi_hibernation_leave(void) |
312 | { | |
313 | /* | |
314 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
315 | * enable it here. | |
316 | */ | |
317 | acpi_enable(); | |
c95d47a8 RW |
318 | /* Reprogram control registers and execute _BFS */ |
319 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
c7e0831d RW |
320 | } |
321 | ||
d8f3de0d | 322 | static void acpi_pm_enable_gpes(void) |
a3d25c27 | 323 | { |
d8f3de0d | 324 | acpi_hw_enable_all_runtime_gpes(); |
a3d25c27 RW |
325 | } |
326 | ||
d8f3de0d RW |
327 | static struct platform_hibernation_ops acpi_hibernation_ops = { |
328 | .begin = acpi_hibernation_begin, | |
329 | .end = acpi_pm_end, | |
330 | .pre_snapshot = acpi_pm_prepare, | |
331 | .finish = acpi_pm_finish, | |
332 | .prepare = acpi_pm_prepare, | |
333 | .enter = acpi_hibernation_enter, | |
334 | .leave = acpi_hibernation_leave, | |
335 | .pre_restore = acpi_pm_disable_gpes, | |
336 | .restore_cleanup = acpi_pm_enable_gpes, | |
337 | }; | |
caea99ef | 338 | |
d8f3de0d RW |
339 | /** |
340 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
341 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
342 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
343 | * requested. | |
344 | */ | |
345 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 346 | { |
d8f3de0d | 347 | int error = acpi_sleep_prepare(ACPI_STATE_S4); |
a634cc10 | 348 | |
d8f3de0d RW |
349 | if (!error) |
350 | acpi_target_sleep_state = ACPI_STATE_S4; | |
351 | return error; | |
a634cc10 RW |
352 | } |
353 | ||
d8f3de0d RW |
354 | /* |
355 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
356 | * been requested. | |
357 | */ | |
358 | static struct platform_hibernation_ops acpi_hibernation_ops_old = { | |
359 | .begin = acpi_hibernation_begin_old, | |
360 | .end = acpi_pm_end, | |
361 | .pre_snapshot = acpi_pm_disable_gpes, | |
362 | .finish = acpi_pm_finish, | |
363 | .prepare = acpi_pm_disable_gpes, | |
a3d25c27 | 364 | .enter = acpi_hibernation_enter, |
c7e0831d | 365 | .leave = acpi_hibernation_leave, |
d8f3de0d RW |
366 | .pre_restore = acpi_pm_disable_gpes, |
367 | .restore_cleanup = acpi_pm_enable_gpes, | |
368 | .recover = acpi_pm_finish, | |
a3d25c27 | 369 | }; |
d8f3de0d | 370 | #endif /* CONFIG_HIBERNATION */ |
a3d25c27 | 371 | |
296699de RW |
372 | int acpi_suspend(u32 acpi_state) |
373 | { | |
374 | suspend_state_t states[] = { | |
375 | [1] = PM_SUSPEND_STANDBY, | |
376 | [3] = PM_SUSPEND_MEM, | |
377 | [5] = PM_SUSPEND_MAX | |
378 | }; | |
379 | ||
380 | if (acpi_state < 6 && states[acpi_state]) | |
381 | return pm_suspend(states[acpi_state]); | |
382 | if (acpi_state == 4) | |
383 | return hibernate(); | |
384 | return -EINVAL; | |
385 | } | |
386 | ||
853298bc | 387 | #ifdef CONFIG_PM_SLEEP |
fd4aff1a SL |
388 | /** |
389 | * acpi_pm_device_sleep_state - return preferred power state of ACPI device | |
390 | * in the system sleep state given by %acpi_target_sleep_state | |
06166780 DB |
391 | * @dev: device to examine; its driver model wakeup flags control |
392 | * whether it should be able to wake up the system | |
fd4aff1a SL |
393 | * @d_min_p: used to store the upper limit of allowed states range |
394 | * Return value: preferred power state of the device on success, -ENODEV on | |
395 | * failure (ie. if there's no 'struct acpi_device' for @dev) | |
396 | * | |
397 | * Find the lowest power (highest number) ACPI device power state that | |
398 | * device @dev can be in while the system is in the sleep state represented | |
399 | * by %acpi_target_sleep_state. If @wake is nonzero, the device should be | |
400 | * able to wake up the system from this sleep state. If @d_min_p is set, | |
401 | * the highest power (lowest number) device power state of @dev allowed | |
402 | * in this system sleep state is stored at the location pointed to by it. | |
403 | * | |
404 | * The caller must ensure that @dev is valid before using this function. | |
405 | * The caller is also responsible for figuring out if the device is | |
406 | * supposed to be able to wake up the system and passing this information | |
407 | * via @wake. | |
408 | */ | |
409 | ||
06166780 | 410 | int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p) |
fd4aff1a SL |
411 | { |
412 | acpi_handle handle = DEVICE_ACPI_HANDLE(dev); | |
413 | struct acpi_device *adev; | |
414 | char acpi_method[] = "_SxD"; | |
415 | unsigned long d_min, d_max; | |
416 | ||
417 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
ead77594 | 418 | printk(KERN_DEBUG "ACPI handle has no context!\n"); |
fd4aff1a SL |
419 | return -ENODEV; |
420 | } | |
421 | ||
422 | acpi_method[2] = '0' + acpi_target_sleep_state; | |
423 | /* | |
424 | * If the sleep state is S0, we will return D3, but if the device has | |
425 | * _S0W, we will use the value from _S0W | |
426 | */ | |
427 | d_min = ACPI_STATE_D0; | |
428 | d_max = ACPI_STATE_D3; | |
429 | ||
430 | /* | |
431 | * If present, _SxD methods return the minimum D-state (highest power | |
432 | * state) we can use for the corresponding S-states. Otherwise, the | |
433 | * minimum D-state is D0 (ACPI 3.x). | |
434 | * | |
435 | * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer | |
436 | * provided -- that's our fault recovery, we ignore retval. | |
437 | */ | |
438 | if (acpi_target_sleep_state > ACPI_STATE_S0) | |
439 | acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); | |
440 | ||
441 | /* | |
442 | * If _PRW says we can wake up the system from the target sleep state, | |
443 | * the D-state returned by _SxD is sufficient for that (we assume a | |
444 | * wakeup-aware driver if wake is set). Still, if _SxW exists | |
445 | * (ACPI 3.x), it should return the maximum (lowest power) D-state that | |
446 | * can wake the system. _S0W may be valid, too. | |
447 | */ | |
448 | if (acpi_target_sleep_state == ACPI_STATE_S0 || | |
06166780 | 449 | (device_may_wakeup(dev) && adev->wakeup.state.enabled && |
fd4aff1a | 450 | adev->wakeup.sleep_state <= acpi_target_sleep_state)) { |
ad3399c3 RW |
451 | acpi_status status; |
452 | ||
fd4aff1a | 453 | acpi_method[3] = 'W'; |
ad3399c3 RW |
454 | status = acpi_evaluate_integer(handle, acpi_method, NULL, |
455 | &d_max); | |
456 | if (ACPI_FAILURE(status)) { | |
457 | d_max = d_min; | |
458 | } else if (d_max < d_min) { | |
459 | /* Warn the user of the broken DSDT */ | |
460 | printk(KERN_WARNING "ACPI: Wrong value from %s\n", | |
461 | acpi_method); | |
462 | /* Sanitize it */ | |
fd4aff1a | 463 | d_min = d_max; |
ad3399c3 | 464 | } |
fd4aff1a SL |
465 | } |
466 | ||
467 | if (d_min_p) | |
468 | *d_min_p = d_min; | |
469 | return d_max; | |
470 | } | |
853298bc | 471 | #endif |
fd4aff1a | 472 | |
f216cc37 AS |
473 | static void acpi_power_off_prepare(void) |
474 | { | |
475 | /* Prepare to power off the system */ | |
476 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3c1d2b60 | 477 | acpi_hw_disable_all_gpes(); |
f216cc37 AS |
478 | } |
479 | ||
480 | static void acpi_power_off(void) | |
481 | { | |
482 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
96b2dd1f | 483 | printk("%s called\n", __func__); |
f216cc37 | 484 | local_irq_disable(); |
9c1c6a1b | 485 | acpi_enable_wakeup_device(ACPI_STATE_S5); |
f216cc37 AS |
486 | acpi_enter_sleep_state(ACPI_STATE_S5); |
487 | } | |
488 | ||
aafbcd16 | 489 | int __init acpi_sleep_init(void) |
1da177e4 | 490 | { |
296699de RW |
491 | acpi_status status; |
492 | u8 type_a, type_b; | |
493 | #ifdef CONFIG_SUSPEND | |
e2a5b420 | 494 | int i = 0; |
296699de | 495 | #endif |
1da177e4 LT |
496 | |
497 | if (acpi_disabled) | |
498 | return 0; | |
499 | ||
5a50fe70 FP |
500 | sleep_states[ACPI_STATE_S0] = 1; |
501 | printk(KERN_INFO PREFIX "(supports S0"); | |
502 | ||
296699de | 503 | #ifdef CONFIG_SUSPEND |
5a50fe70 | 504 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { |
1da177e4 LT |
505 | status = acpi_get_sleep_type_data(i, &type_a, &type_b); |
506 | if (ACPI_SUCCESS(status)) { | |
507 | sleep_states[i] = 1; | |
508 | printk(" S%d", i); | |
509 | } | |
1da177e4 | 510 | } |
1da177e4 | 511 | |
d8f3de0d RW |
512 | suspend_set_ops(old_suspend_ordering ? |
513 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
296699de | 514 | #endif |
a3d25c27 | 515 | |
b0cb1a19 | 516 | #ifdef CONFIG_HIBERNATION |
296699de RW |
517 | status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); |
518 | if (ACPI_SUCCESS(status)) { | |
d8f3de0d RW |
519 | hibernation_set_ops(old_suspend_ordering ? |
520 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
296699de | 521 | sleep_states[ACPI_STATE_S4] = 1; |
f216cc37 | 522 | printk(" S4"); |
296699de | 523 | } |
a3d25c27 | 524 | #endif |
f216cc37 AS |
525 | status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
526 | if (ACPI_SUCCESS(status)) { | |
527 | sleep_states[ACPI_STATE_S5] = 1; | |
528 | printk(" S5"); | |
529 | pm_power_off_prepare = acpi_power_off_prepare; | |
530 | pm_power_off = acpi_power_off; | |
531 | } | |
532 | printk(")\n"); | |
1da177e4 LT |
533 | return 0; |
534 | } |