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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> | |
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 | ||
853298bc | 27 | #ifdef CONFIG_PM_SLEEP |
296699de | 28 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
60417f59 RW |
29 | static bool acpi_sleep_finish_wake_up; |
30 | ||
31 | /* | |
32 | * ACPI 2.0 and later want us to execute _PTS after suspending devices, so we | |
33 | * allow the user to request that behavior by using the 'acpi_new_pts_ordering' | |
34 | * kernel command line option that causes the following variable to be set. | |
35 | */ | |
36 | static bool new_pts_ordering; | |
37 | ||
38 | static int __init acpi_new_pts_ordering(char *str) | |
39 | { | |
40 | new_pts_ordering = true; | |
41 | return 1; | |
42 | } | |
43 | __setup("acpi_new_pts_ordering", acpi_new_pts_ordering); | |
853298bc | 44 | #endif |
296699de | 45 | |
2f3f2226 AS |
46 | int acpi_sleep_prepare(u32 acpi_state) |
47 | { | |
48 | #ifdef CONFIG_ACPI_SLEEP | |
49 | /* do we have a wakeup address for S2 and S3? */ | |
50 | if (acpi_state == ACPI_STATE_S3) { | |
51 | if (!acpi_wakeup_address) { | |
52 | return -EFAULT; | |
53 | } | |
54 | acpi_set_firmware_waking_vector((acpi_physical_address) | |
55 | virt_to_phys((void *) | |
56 | acpi_wakeup_address)); | |
57 | ||
58 | } | |
59 | ACPI_FLUSH_CPU_CACHE(); | |
60 | acpi_enable_wakeup_device_prep(acpi_state); | |
61 | #endif | |
2f3f2226 AS |
62 | acpi_enter_sleep_state_prep(acpi_state); |
63 | return 0; | |
64 | } | |
65 | ||
296699de | 66 | #ifdef CONFIG_SUSPEND |
26398a70 | 67 | static struct platform_suspend_ops acpi_pm_ops; |
1da177e4 | 68 | |
1da177e4 LT |
69 | extern void do_suspend_lowlevel(void); |
70 | ||
71 | static u32 acpi_suspend_states[] = { | |
e2a5b420 AS |
72 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
73 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
74 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 75 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
76 | }; |
77 | ||
78 | static int init_8259A_after_S1; | |
79 | ||
e9b3aba8 | 80 | /** |
c697eece | 81 | * acpi_pm_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
82 | * associated with given @pm_state, if supported. |
83 | */ | |
84 | ||
c697eece | 85 | static int acpi_pm_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
86 | { |
87 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
88 | int error = 0; | |
89 | ||
90 | if (sleep_states[acpi_state]) { | |
91 | acpi_target_sleep_state = acpi_state; | |
60417f59 RW |
92 | if (new_pts_ordering) |
93 | return 0; | |
94 | ||
95 | error = acpi_sleep_prepare(acpi_state); | |
96 | if (error) | |
97 | acpi_target_sleep_state = ACPI_STATE_S0; | |
98 | else | |
99 | acpi_sleep_finish_wake_up = true; | |
e9b3aba8 RW |
100 | } else { |
101 | printk(KERN_ERR "ACPI does not support this state: %d\n", | |
102 | pm_state); | |
103 | error = -ENOSYS; | |
104 | } | |
105 | return error; | |
106 | } | |
107 | ||
1da177e4 LT |
108 | /** |
109 | * acpi_pm_prepare - Do preliminary suspend work. | |
1da177e4 | 110 | * |
e9b3aba8 RW |
111 | * If necessary, set the firmware waking vector and do arch-specific |
112 | * nastiness to get the wakeup code to the waking vector. | |
1da177e4 LT |
113 | */ |
114 | ||
e6c5eb95 | 115 | static int acpi_pm_prepare(void) |
1da177e4 | 116 | { |
60417f59 RW |
117 | if (new_pts_ordering) { |
118 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
1da177e4 | 119 | |
60417f59 RW |
120 | if (error) { |
121 | acpi_target_sleep_state = ACPI_STATE_S0; | |
122 | return error; | |
123 | } | |
124 | acpi_sleep_finish_wake_up = true; | |
125 | } | |
e9b3aba8 | 126 | |
60417f59 | 127 | return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT; |
1da177e4 LT |
128 | } |
129 | ||
1da177e4 LT |
130 | /** |
131 | * acpi_pm_enter - Actually enter a sleep state. | |
e9b3aba8 | 132 | * @pm_state: ignored |
1da177e4 | 133 | * |
50ad147a RW |
134 | * Flush caches and go to sleep. For STR we have to call arch-specific |
135 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
136 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
137 | */ | |
138 | ||
139 | static int acpi_pm_enter(suspend_state_t pm_state) | |
140 | { | |
141 | acpi_status status = AE_OK; | |
142 | unsigned long flags = 0; | |
e9b3aba8 | 143 | u32 acpi_state = acpi_target_sleep_state; |
1da177e4 LT |
144 | |
145 | ACPI_FLUSH_CPU_CACHE(); | |
146 | ||
147 | /* Do arch specific saving of state. */ | |
50ad147a | 148 | if (acpi_state == ACPI_STATE_S3) { |
1da177e4 | 149 | int error = acpi_save_state_mem(); |
e9b3aba8 | 150 | |
60417f59 | 151 | if (error) |
1da177e4 LT |
152 | return error; |
153 | } | |
154 | ||
1da177e4 LT |
155 | local_irq_save(flags); |
156 | acpi_enable_wakeup_device(acpi_state); | |
e9b3aba8 RW |
157 | switch (acpi_state) { |
158 | case ACPI_STATE_S1: | |
1da177e4 LT |
159 | barrier(); |
160 | status = acpi_enter_sleep_state(acpi_state); | |
161 | break; | |
162 | ||
e9b3aba8 | 163 | case ACPI_STATE_S3: |
1da177e4 LT |
164 | do_suspend_lowlevel(); |
165 | break; | |
1da177e4 | 166 | } |
872d83d0 | 167 | |
c95d47a8 RW |
168 | /* Reprogram control registers and execute _BFS */ |
169 | acpi_leave_sleep_state_prep(acpi_state); | |
170 | ||
872d83d0 AP |
171 | /* ACPI 3.0 specs (P62) says that it's the responsabilty |
172 | * of the OSPM to clear the status bit [ implying that the | |
173 | * POWER_BUTTON event should not reach userspace ] | |
174 | */ | |
175 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) | |
176 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
177 | ||
a3627f67 SL |
178 | /* |
179 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
180 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
181 | * acpi_leave_sleep_state will reenable specific GPEs later | |
182 | */ | |
183 | acpi_hw_disable_all_gpes(); | |
184 | ||
1da177e4 LT |
185 | local_irq_restore(flags); |
186 | printk(KERN_DEBUG "Back to C!\n"); | |
187 | ||
e9b3aba8 | 188 | /* restore processor state */ |
50ad147a | 189 | if (acpi_state == ACPI_STATE_S3) |
1da177e4 LT |
190 | acpi_restore_state_mem(); |
191 | ||
1da177e4 LT |
192 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
193 | } | |
194 | ||
1da177e4 | 195 | /** |
c697eece | 196 | * acpi_pm_finish - Instruct the platform to leave a sleep state. |
1da177e4 LT |
197 | * |
198 | * This is called after we wake back up (or if entering the sleep state | |
199 | * failed). | |
200 | */ | |
201 | ||
e6c5eb95 | 202 | static void acpi_pm_finish(void) |
1da177e4 | 203 | { |
e9b3aba8 | 204 | u32 acpi_state = acpi_target_sleep_state; |
1da177e4 | 205 | |
1da177e4 | 206 | acpi_disable_wakeup_device(acpi_state); |
1dbc1fda | 207 | acpi_leave_sleep_state(acpi_state); |
1da177e4 LT |
208 | |
209 | /* reset firmware waking vector */ | |
210 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
211 | ||
e9b3aba8 | 212 | acpi_target_sleep_state = ACPI_STATE_S0; |
60417f59 | 213 | acpi_sleep_finish_wake_up = false; |
e9b3aba8 | 214 | |
e8b2fd01 | 215 | #ifdef CONFIG_X86 |
1da177e4 LT |
216 | if (init_8259A_after_S1) { |
217 | printk("Broken toshiba laptop -> kicking interrupts\n"); | |
218 | init_8259A(0); | |
219 | } | |
e8b2fd01 | 220 | #endif |
1da177e4 LT |
221 | } |
222 | ||
c697eece RW |
223 | /** |
224 | * acpi_pm_end - Finish up suspend sequence. | |
225 | */ | |
226 | ||
227 | static void acpi_pm_end(void) | |
228 | { | |
229 | /* | |
60417f59 RW |
230 | * This is necessary in case acpi_pm_finish() is not called directly |
231 | * during a failing transition to a sleep state. | |
c697eece | 232 | */ |
60417f59 RW |
233 | if (acpi_sleep_finish_wake_up) |
234 | acpi_pm_finish(); | |
c697eece RW |
235 | } |
236 | ||
eb9289eb SL |
237 | static int acpi_pm_state_valid(suspend_state_t pm_state) |
238 | { | |
e8c9c502 | 239 | u32 acpi_state; |
eb9289eb | 240 | |
e8c9c502 JB |
241 | switch (pm_state) { |
242 | case PM_SUSPEND_ON: | |
243 | case PM_SUSPEND_STANDBY: | |
244 | case PM_SUSPEND_MEM: | |
245 | acpi_state = acpi_suspend_states[pm_state]; | |
246 | ||
247 | return sleep_states[acpi_state]; | |
248 | default: | |
249 | return 0; | |
250 | } | |
eb9289eb SL |
251 | } |
252 | ||
26398a70 | 253 | static struct platform_suspend_ops acpi_pm_ops = { |
eb9289eb | 254 | .valid = acpi_pm_state_valid, |
c697eece | 255 | .begin = acpi_pm_begin, |
e2a5b420 AS |
256 | .prepare = acpi_pm_prepare, |
257 | .enter = acpi_pm_enter, | |
258 | .finish = acpi_pm_finish, | |
c697eece | 259 | .end = acpi_pm_end, |
1da177e4 LT |
260 | }; |
261 | ||
296699de RW |
262 | /* |
263 | * Toshiba fails to preserve interrupts over S1, reinitialization | |
264 | * of 8259 is needed after S1 resume. | |
265 | */ | |
1855256c | 266 | static int __init init_ints_after_s1(const struct dmi_system_id *d) |
296699de RW |
267 | { |
268 | printk(KERN_WARNING "%s with broken S1 detected.\n", d->ident); | |
269 | init_8259A_after_S1 = 1; | |
270 | return 0; | |
271 | } | |
272 | ||
273 | static struct dmi_system_id __initdata acpisleep_dmi_table[] = { | |
274 | { | |
275 | .callback = init_ints_after_s1, | |
276 | .ident = "Toshiba Satellite 4030cdt", | |
277 | .matches = {DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),}, | |
278 | }, | |
279 | {}, | |
280 | }; | |
281 | #endif /* CONFIG_SUSPEND */ | |
282 | ||
b0cb1a19 | 283 | #ifdef CONFIG_HIBERNATION |
74f270af RW |
284 | static int acpi_hibernation_start(void) |
285 | { | |
286 | acpi_target_sleep_state = ACPI_STATE_S4; | |
287 | return 0; | |
288 | } | |
289 | ||
a3d25c27 RW |
290 | static int acpi_hibernation_prepare(void) |
291 | { | |
3c1d2b60 RW |
292 | int error; |
293 | ||
294 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
295 | if (error) | |
296 | return error; | |
297 | ||
298 | if (!ACPI_SUCCESS(acpi_hw_disable_all_gpes())) | |
299 | error = -EFAULT; | |
300 | ||
301 | return error; | |
a3d25c27 RW |
302 | } |
303 | ||
304 | static int acpi_hibernation_enter(void) | |
305 | { | |
306 | acpi_status status = AE_OK; | |
307 | unsigned long flags = 0; | |
308 | ||
309 | ACPI_FLUSH_CPU_CACHE(); | |
310 | ||
311 | local_irq_save(flags); | |
312 | acpi_enable_wakeup_device(ACPI_STATE_S4); | |
313 | /* This shouldn't return. If it returns, we have a problem */ | |
314 | status = acpi_enter_sleep_state(ACPI_STATE_S4); | |
c95d47a8 RW |
315 | /* Reprogram control registers and execute _BFS */ |
316 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
317 | local_irq_restore(flags); |
318 | ||
319 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
320 | } | |
321 | ||
c7e0831d RW |
322 | static void acpi_hibernation_leave(void) |
323 | { | |
324 | /* | |
325 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
326 | * enable it here. | |
327 | */ | |
328 | acpi_enable(); | |
c95d47a8 RW |
329 | /* Reprogram control registers and execute _BFS */ |
330 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
c7e0831d RW |
331 | } |
332 | ||
a3d25c27 RW |
333 | static void acpi_hibernation_finish(void) |
334 | { | |
a3d25c27 | 335 | acpi_disable_wakeup_device(ACPI_STATE_S4); |
1dbc1fda | 336 | acpi_leave_sleep_state(ACPI_STATE_S4); |
a3d25c27 RW |
337 | |
338 | /* reset firmware waking vector */ | |
339 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
74f270af RW |
340 | |
341 | acpi_target_sleep_state = ACPI_STATE_S0; | |
a3d25c27 RW |
342 | } |
343 | ||
a634cc10 RW |
344 | static int acpi_hibernation_pre_restore(void) |
345 | { | |
346 | acpi_status status; | |
347 | ||
348 | status = acpi_hw_disable_all_gpes(); | |
349 | ||
350 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
351 | } | |
352 | ||
353 | static void acpi_hibernation_restore_cleanup(void) | |
354 | { | |
355 | acpi_hw_enable_all_runtime_gpes(); | |
356 | } | |
357 | ||
b3dac3b3 | 358 | static struct platform_hibernation_ops acpi_hibernation_ops = { |
74f270af RW |
359 | .start = acpi_hibernation_start, |
360 | .pre_snapshot = acpi_hibernation_prepare, | |
361 | .finish = acpi_hibernation_finish, | |
a3d25c27 RW |
362 | .prepare = acpi_hibernation_prepare, |
363 | .enter = acpi_hibernation_enter, | |
c7e0831d | 364 | .leave = acpi_hibernation_leave, |
a634cc10 RW |
365 | .pre_restore = acpi_hibernation_pre_restore, |
366 | .restore_cleanup = acpi_hibernation_restore_cleanup, | |
a3d25c27 | 367 | }; |
b0cb1a19 | 368 | #endif /* CONFIG_HIBERNATION */ |
a3d25c27 | 369 | |
296699de RW |
370 | int acpi_suspend(u32 acpi_state) |
371 | { | |
372 | suspend_state_t states[] = { | |
373 | [1] = PM_SUSPEND_STANDBY, | |
374 | [3] = PM_SUSPEND_MEM, | |
375 | [5] = PM_SUSPEND_MAX | |
376 | }; | |
377 | ||
378 | if (acpi_state < 6 && states[acpi_state]) | |
379 | return pm_suspend(states[acpi_state]); | |
380 | if (acpi_state == 4) | |
381 | return hibernate(); | |
382 | return -EINVAL; | |
383 | } | |
384 | ||
853298bc | 385 | #ifdef CONFIG_PM_SLEEP |
fd4aff1a SL |
386 | /** |
387 | * acpi_pm_device_sleep_state - return preferred power state of ACPI device | |
388 | * in the system sleep state given by %acpi_target_sleep_state | |
389 | * @dev: device to examine | |
390 | * @wake: if set, the device should be able to wake up the system | |
391 | * @d_min_p: used to store the upper limit of allowed states range | |
392 | * Return value: preferred power state of the device on success, -ENODEV on | |
393 | * failure (ie. if there's no 'struct acpi_device' for @dev) | |
394 | * | |
395 | * Find the lowest power (highest number) ACPI device power state that | |
396 | * device @dev can be in while the system is in the sleep state represented | |
397 | * by %acpi_target_sleep_state. If @wake is nonzero, the device should be | |
398 | * able to wake up the system from this sleep state. If @d_min_p is set, | |
399 | * the highest power (lowest number) device power state of @dev allowed | |
400 | * in this system sleep state is stored at the location pointed to by it. | |
401 | * | |
402 | * The caller must ensure that @dev is valid before using this function. | |
403 | * The caller is also responsible for figuring out if the device is | |
404 | * supposed to be able to wake up the system and passing this information | |
405 | * via @wake. | |
406 | */ | |
407 | ||
408 | int acpi_pm_device_sleep_state(struct device *dev, int wake, int *d_min_p) | |
409 | { | |
410 | acpi_handle handle = DEVICE_ACPI_HANDLE(dev); | |
411 | struct acpi_device *adev; | |
412 | char acpi_method[] = "_SxD"; | |
413 | unsigned long d_min, d_max; | |
414 | ||
415 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
ead77594 | 416 | printk(KERN_DEBUG "ACPI handle has no context!\n"); |
fd4aff1a SL |
417 | return -ENODEV; |
418 | } | |
419 | ||
420 | acpi_method[2] = '0' + acpi_target_sleep_state; | |
421 | /* | |
422 | * If the sleep state is S0, we will return D3, but if the device has | |
423 | * _S0W, we will use the value from _S0W | |
424 | */ | |
425 | d_min = ACPI_STATE_D0; | |
426 | d_max = ACPI_STATE_D3; | |
427 | ||
428 | /* | |
429 | * If present, _SxD methods return the minimum D-state (highest power | |
430 | * state) we can use for the corresponding S-states. Otherwise, the | |
431 | * minimum D-state is D0 (ACPI 3.x). | |
432 | * | |
433 | * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer | |
434 | * provided -- that's our fault recovery, we ignore retval. | |
435 | */ | |
436 | if (acpi_target_sleep_state > ACPI_STATE_S0) | |
437 | acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); | |
438 | ||
439 | /* | |
440 | * If _PRW says we can wake up the system from the target sleep state, | |
441 | * the D-state returned by _SxD is sufficient for that (we assume a | |
442 | * wakeup-aware driver if wake is set). Still, if _SxW exists | |
443 | * (ACPI 3.x), it should return the maximum (lowest power) D-state that | |
444 | * can wake the system. _S0W may be valid, too. | |
445 | */ | |
446 | if (acpi_target_sleep_state == ACPI_STATE_S0 || | |
447 | (wake && adev->wakeup.state.enabled && | |
448 | adev->wakeup.sleep_state <= acpi_target_sleep_state)) { | |
449 | acpi_method[3] = 'W'; | |
450 | acpi_evaluate_integer(handle, acpi_method, NULL, &d_max); | |
451 | /* Sanity check */ | |
452 | if (d_max < d_min) | |
453 | d_min = d_max; | |
454 | } | |
455 | ||
456 | if (d_min_p) | |
457 | *d_min_p = d_min; | |
458 | return d_max; | |
459 | } | |
853298bc | 460 | #endif |
fd4aff1a | 461 | |
f216cc37 AS |
462 | static void acpi_power_off_prepare(void) |
463 | { | |
464 | /* Prepare to power off the system */ | |
465 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3c1d2b60 | 466 | acpi_hw_disable_all_gpes(); |
f216cc37 AS |
467 | } |
468 | ||
469 | static void acpi_power_off(void) | |
470 | { | |
471 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
472 | printk("%s called\n", __FUNCTION__); | |
473 | local_irq_disable(); | |
9c1c6a1b | 474 | acpi_enable_wakeup_device(ACPI_STATE_S5); |
f216cc37 AS |
475 | acpi_enter_sleep_state(ACPI_STATE_S5); |
476 | } | |
477 | ||
aafbcd16 | 478 | int __init acpi_sleep_init(void) |
1da177e4 | 479 | { |
296699de RW |
480 | acpi_status status; |
481 | u8 type_a, type_b; | |
482 | #ifdef CONFIG_SUSPEND | |
e2a5b420 | 483 | int i = 0; |
1da177e4 LT |
484 | |
485 | dmi_check_system(acpisleep_dmi_table); | |
296699de | 486 | #endif |
1da177e4 LT |
487 | |
488 | if (acpi_disabled) | |
489 | return 0; | |
490 | ||
5a50fe70 FP |
491 | sleep_states[ACPI_STATE_S0] = 1; |
492 | printk(KERN_INFO PREFIX "(supports S0"); | |
493 | ||
296699de | 494 | #ifdef CONFIG_SUSPEND |
5a50fe70 | 495 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { |
1da177e4 LT |
496 | status = acpi_get_sleep_type_data(i, &type_a, &type_b); |
497 | if (ACPI_SUCCESS(status)) { | |
498 | sleep_states[i] = 1; | |
499 | printk(" S%d", i); | |
500 | } | |
1da177e4 | 501 | } |
1da177e4 | 502 | |
26398a70 | 503 | suspend_set_ops(&acpi_pm_ops); |
296699de | 504 | #endif |
a3d25c27 | 505 | |
b0cb1a19 | 506 | #ifdef CONFIG_HIBERNATION |
296699de RW |
507 | status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); |
508 | if (ACPI_SUCCESS(status)) { | |
a3d25c27 | 509 | hibernation_set_ops(&acpi_hibernation_ops); |
296699de | 510 | sleep_states[ACPI_STATE_S4] = 1; |
f216cc37 | 511 | printk(" S4"); |
296699de | 512 | } |
a3d25c27 | 513 | #endif |
f216cc37 AS |
514 | status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
515 | if (ACPI_SUCCESS(status)) { | |
516 | sleep_states[ACPI_STATE_S5] = 1; | |
517 | printk(" S5"); | |
518 | pm_power_off_prepare = acpi_power_off_prepare; | |
519 | pm_power_off = acpi_power_off; | |
520 | } | |
521 | printk(")\n"); | |
1da177e4 LT |
522 | return 0; |
523 | } |