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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; |
853298bc | 29 | #endif |
296699de | 30 | |
c9b6c8f6 | 31 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
32 | { |
33 | #ifdef CONFIG_ACPI_SLEEP | |
34 | /* do we have a wakeup address for S2 and S3? */ | |
35 | if (acpi_state == ACPI_STATE_S3) { | |
36 | if (!acpi_wakeup_address) { | |
37 | return -EFAULT; | |
38 | } | |
39 | acpi_set_firmware_waking_vector((acpi_physical_address) | |
40 | virt_to_phys((void *) | |
41 | acpi_wakeup_address)); | |
42 | ||
43 | } | |
44 | ACPI_FLUSH_CPU_CACHE(); | |
45 | acpi_enable_wakeup_device_prep(acpi_state); | |
46 | #endif | |
c9b6c8f6 RW |
47 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
48 | acpi_state); | |
2f3f2226 AS |
49 | acpi_enter_sleep_state_prep(acpi_state); |
50 | return 0; | |
51 | } | |
52 | ||
296699de | 53 | #ifdef CONFIG_SUSPEND |
2c6e33c3 | 54 | static struct platform_suspend_ops acpi_suspend_ops; |
1da177e4 | 55 | |
1da177e4 LT |
56 | extern void do_suspend_lowlevel(void); |
57 | ||
58 | static u32 acpi_suspend_states[] = { | |
e2a5b420 AS |
59 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
60 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
61 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 62 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
63 | }; |
64 | ||
65 | static int init_8259A_after_S1; | |
66 | ||
e9b3aba8 | 67 | /** |
2c6e33c3 | 68 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
69 | * associated with given @pm_state, if supported. |
70 | */ | |
71 | ||
2c6e33c3 | 72 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
73 | { |
74 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
75 | int error = 0; | |
76 | ||
77 | if (sleep_states[acpi_state]) { | |
78 | acpi_target_sleep_state = acpi_state; | |
79 | } else { | |
80 | printk(KERN_ERR "ACPI does not support this state: %d\n", | |
81 | pm_state); | |
82 | error = -ENOSYS; | |
83 | } | |
84 | return error; | |
85 | } | |
86 | ||
1da177e4 | 87 | /** |
2c6e33c3 | 88 | * acpi_suspend_prepare - Do preliminary suspend work. |
1da177e4 | 89 | * |
e9b3aba8 RW |
90 | * If necessary, set the firmware waking vector and do arch-specific |
91 | * nastiness to get the wakeup code to the waking vector. | |
1da177e4 LT |
92 | */ |
93 | ||
2c6e33c3 | 94 | static int acpi_suspend_prepare(void) |
1da177e4 | 95 | { |
7731ce63 | 96 | int error = acpi_sleep_prepare(acpi_target_sleep_state); |
1da177e4 | 97 | |
7731ce63 RW |
98 | if (error) { |
99 | acpi_target_sleep_state = ACPI_STATE_S0; | |
100 | return error; | |
60417f59 | 101 | } |
e9b3aba8 | 102 | |
60417f59 | 103 | return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT; |
1da177e4 LT |
104 | } |
105 | ||
1da177e4 | 106 | /** |
2c6e33c3 | 107 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 108 | * @pm_state: ignored |
1da177e4 | 109 | * |
50ad147a RW |
110 | * Flush caches and go to sleep. For STR we have to call arch-specific |
111 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
112 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
113 | */ | |
114 | ||
2c6e33c3 | 115 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
116 | { |
117 | acpi_status status = AE_OK; | |
118 | unsigned long flags = 0; | |
e9b3aba8 | 119 | u32 acpi_state = acpi_target_sleep_state; |
1da177e4 LT |
120 | |
121 | ACPI_FLUSH_CPU_CACHE(); | |
122 | ||
123 | /* Do arch specific saving of state. */ | |
50ad147a | 124 | if (acpi_state == ACPI_STATE_S3) { |
1da177e4 | 125 | int error = acpi_save_state_mem(); |
e9b3aba8 | 126 | |
60417f59 | 127 | if (error) |
1da177e4 LT |
128 | return error; |
129 | } | |
130 | ||
1da177e4 LT |
131 | local_irq_save(flags); |
132 | acpi_enable_wakeup_device(acpi_state); | |
e9b3aba8 RW |
133 | switch (acpi_state) { |
134 | case ACPI_STATE_S1: | |
1da177e4 LT |
135 | barrier(); |
136 | status = acpi_enter_sleep_state(acpi_state); | |
137 | break; | |
138 | ||
e9b3aba8 | 139 | case ACPI_STATE_S3: |
1da177e4 LT |
140 | do_suspend_lowlevel(); |
141 | break; | |
1da177e4 | 142 | } |
872d83d0 | 143 | |
c95d47a8 RW |
144 | /* Reprogram control registers and execute _BFS */ |
145 | acpi_leave_sleep_state_prep(acpi_state); | |
146 | ||
23b168d4 | 147 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
148 | * of the OSPM to clear the status bit [ implying that the |
149 | * POWER_BUTTON event should not reach userspace ] | |
150 | */ | |
151 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) | |
152 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
153 | ||
a3627f67 SL |
154 | /* |
155 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
156 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
157 | * acpi_leave_sleep_state will reenable specific GPEs later | |
158 | */ | |
159 | acpi_hw_disable_all_gpes(); | |
160 | ||
1da177e4 LT |
161 | local_irq_restore(flags); |
162 | printk(KERN_DEBUG "Back to C!\n"); | |
163 | ||
e9b3aba8 | 164 | /* restore processor state */ |
50ad147a | 165 | if (acpi_state == ACPI_STATE_S3) |
1da177e4 LT |
166 | acpi_restore_state_mem(); |
167 | ||
1da177e4 LT |
168 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
169 | } | |
170 | ||
1da177e4 | 171 | /** |
2c6e33c3 | 172 | * acpi_suspend_finish - Instruct the platform to leave a sleep state. |
1da177e4 LT |
173 | * |
174 | * This is called after we wake back up (or if entering the sleep state | |
175 | * failed). | |
176 | */ | |
177 | ||
2c6e33c3 | 178 | static void acpi_suspend_finish(void) |
1da177e4 | 179 | { |
e9b3aba8 | 180 | u32 acpi_state = acpi_target_sleep_state; |
1da177e4 | 181 | |
1da177e4 | 182 | acpi_disable_wakeup_device(acpi_state); |
1dbc1fda | 183 | acpi_leave_sleep_state(acpi_state); |
1da177e4 LT |
184 | |
185 | /* reset firmware waking vector */ | |
186 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
187 | ||
e9b3aba8 RW |
188 | acpi_target_sleep_state = ACPI_STATE_S0; |
189 | ||
e8b2fd01 | 190 | #ifdef CONFIG_X86 |
1da177e4 LT |
191 | if (init_8259A_after_S1) { |
192 | printk("Broken toshiba laptop -> kicking interrupts\n"); | |
193 | init_8259A(0); | |
194 | } | |
e8b2fd01 | 195 | #endif |
1da177e4 LT |
196 | } |
197 | ||
c697eece | 198 | /** |
2c6e33c3 | 199 | * acpi_suspend_end - Finish up suspend sequence. |
c697eece RW |
200 | */ |
201 | ||
2c6e33c3 | 202 | static void acpi_suspend_end(void) |
c697eece RW |
203 | { |
204 | /* | |
2c6e33c3 | 205 | * This is necessary in case acpi_suspend_finish() is not called during a |
7731ce63 | 206 | * failing transition to a sleep state. |
c697eece | 207 | */ |
7731ce63 | 208 | acpi_target_sleep_state = ACPI_STATE_S0; |
c697eece RW |
209 | } |
210 | ||
2c6e33c3 | 211 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 212 | { |
e8c9c502 | 213 | u32 acpi_state; |
eb9289eb | 214 | |
e8c9c502 JB |
215 | switch (pm_state) { |
216 | case PM_SUSPEND_ON: | |
217 | case PM_SUSPEND_STANDBY: | |
218 | case PM_SUSPEND_MEM: | |
219 | acpi_state = acpi_suspend_states[pm_state]; | |
220 | ||
221 | return sleep_states[acpi_state]; | |
222 | default: | |
223 | return 0; | |
224 | } | |
eb9289eb SL |
225 | } |
226 | ||
2c6e33c3 LB |
227 | static struct platform_suspend_ops acpi_suspend_ops = { |
228 | .valid = acpi_suspend_state_valid, | |
229 | .begin = acpi_suspend_begin, | |
230 | .prepare = acpi_suspend_prepare, | |
231 | .enter = acpi_suspend_enter, | |
232 | .finish = acpi_suspend_finish, | |
233 | .end = acpi_suspend_end, | |
1da177e4 LT |
234 | }; |
235 | ||
296699de RW |
236 | /* |
237 | * Toshiba fails to preserve interrupts over S1, reinitialization | |
238 | * of 8259 is needed after S1 resume. | |
239 | */ | |
1855256c | 240 | static int __init init_ints_after_s1(const struct dmi_system_id *d) |
296699de RW |
241 | { |
242 | printk(KERN_WARNING "%s with broken S1 detected.\n", d->ident); | |
243 | init_8259A_after_S1 = 1; | |
244 | return 0; | |
245 | } | |
246 | ||
247 | static struct dmi_system_id __initdata acpisleep_dmi_table[] = { | |
248 | { | |
249 | .callback = init_ints_after_s1, | |
250 | .ident = "Toshiba Satellite 4030cdt", | |
251 | .matches = {DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),}, | |
252 | }, | |
253 | {}, | |
254 | }; | |
255 | #endif /* CONFIG_SUSPEND */ | |
256 | ||
b0cb1a19 | 257 | #ifdef CONFIG_HIBERNATION |
caea99ef | 258 | static int acpi_hibernation_begin(void) |
74f270af RW |
259 | { |
260 | acpi_target_sleep_state = ACPI_STATE_S4; | |
7258ec5d | 261 | |
7731ce63 | 262 | return 0; |
74f270af RW |
263 | } |
264 | ||
a3d25c27 RW |
265 | static int acpi_hibernation_prepare(void) |
266 | { | |
7731ce63 | 267 | int error = acpi_sleep_prepare(ACPI_STATE_S4); |
3c1d2b60 | 268 | |
7731ce63 RW |
269 | if (error) { |
270 | acpi_target_sleep_state = ACPI_STATE_S0; | |
271 | return error; | |
7258ec5d | 272 | } |
3c1d2b60 | 273 | |
7258ec5d | 274 | return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT; |
a3d25c27 RW |
275 | } |
276 | ||
277 | static int acpi_hibernation_enter(void) | |
278 | { | |
279 | acpi_status status = AE_OK; | |
280 | unsigned long flags = 0; | |
281 | ||
282 | ACPI_FLUSH_CPU_CACHE(); | |
283 | ||
284 | local_irq_save(flags); | |
285 | acpi_enable_wakeup_device(ACPI_STATE_S4); | |
286 | /* This shouldn't return. If it returns, we have a problem */ | |
287 | status = acpi_enter_sleep_state(ACPI_STATE_S4); | |
c95d47a8 RW |
288 | /* Reprogram control registers and execute _BFS */ |
289 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
290 | local_irq_restore(flags); |
291 | ||
292 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
293 | } | |
294 | ||
c7e0831d RW |
295 | static void acpi_hibernation_leave(void) |
296 | { | |
297 | /* | |
298 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
299 | * enable it here. | |
300 | */ | |
301 | acpi_enable(); | |
c95d47a8 RW |
302 | /* Reprogram control registers and execute _BFS */ |
303 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
c7e0831d RW |
304 | } |
305 | ||
a3d25c27 RW |
306 | static void acpi_hibernation_finish(void) |
307 | { | |
a3d25c27 | 308 | acpi_disable_wakeup_device(ACPI_STATE_S4); |
1dbc1fda | 309 | acpi_leave_sleep_state(ACPI_STATE_S4); |
a3d25c27 RW |
310 | |
311 | /* reset firmware waking vector */ | |
312 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
74f270af RW |
313 | |
314 | acpi_target_sleep_state = ACPI_STATE_S0; | |
a3d25c27 RW |
315 | } |
316 | ||
caea99ef RW |
317 | static void acpi_hibernation_end(void) |
318 | { | |
319 | /* | |
320 | * This is necessary in case acpi_hibernation_finish() is not called | |
7731ce63 | 321 | * during a failing transition to the sleep state. |
caea99ef | 322 | */ |
7731ce63 | 323 | acpi_target_sleep_state = ACPI_STATE_S0; |
caea99ef RW |
324 | } |
325 | ||
a634cc10 RW |
326 | static int acpi_hibernation_pre_restore(void) |
327 | { | |
328 | acpi_status status; | |
329 | ||
330 | status = acpi_hw_disable_all_gpes(); | |
331 | ||
332 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
333 | } | |
334 | ||
335 | static void acpi_hibernation_restore_cleanup(void) | |
336 | { | |
337 | acpi_hw_enable_all_runtime_gpes(); | |
338 | } | |
339 | ||
b3dac3b3 | 340 | static struct platform_hibernation_ops acpi_hibernation_ops = { |
caea99ef RW |
341 | .begin = acpi_hibernation_begin, |
342 | .end = acpi_hibernation_end, | |
74f270af RW |
343 | .pre_snapshot = acpi_hibernation_prepare, |
344 | .finish = acpi_hibernation_finish, | |
a3d25c27 RW |
345 | .prepare = acpi_hibernation_prepare, |
346 | .enter = acpi_hibernation_enter, | |
c7e0831d | 347 | .leave = acpi_hibernation_leave, |
a634cc10 RW |
348 | .pre_restore = acpi_hibernation_pre_restore, |
349 | .restore_cleanup = acpi_hibernation_restore_cleanup, | |
a3d25c27 | 350 | }; |
b0cb1a19 | 351 | #endif /* CONFIG_HIBERNATION */ |
a3d25c27 | 352 | |
296699de RW |
353 | int acpi_suspend(u32 acpi_state) |
354 | { | |
355 | suspend_state_t states[] = { | |
356 | [1] = PM_SUSPEND_STANDBY, | |
357 | [3] = PM_SUSPEND_MEM, | |
358 | [5] = PM_SUSPEND_MAX | |
359 | }; | |
360 | ||
361 | if (acpi_state < 6 && states[acpi_state]) | |
362 | return pm_suspend(states[acpi_state]); | |
363 | if (acpi_state == 4) | |
364 | return hibernate(); | |
365 | return -EINVAL; | |
366 | } | |
367 | ||
853298bc | 368 | #ifdef CONFIG_PM_SLEEP |
fd4aff1a SL |
369 | /** |
370 | * acpi_pm_device_sleep_state - return preferred power state of ACPI device | |
371 | * in the system sleep state given by %acpi_target_sleep_state | |
372 | * @dev: device to examine | |
373 | * @wake: if set, the device should be able to wake up the system | |
374 | * @d_min_p: used to store the upper limit of allowed states range | |
375 | * Return value: preferred power state of the device on success, -ENODEV on | |
376 | * failure (ie. if there's no 'struct acpi_device' for @dev) | |
377 | * | |
378 | * Find the lowest power (highest number) ACPI device power state that | |
379 | * device @dev can be in while the system is in the sleep state represented | |
380 | * by %acpi_target_sleep_state. If @wake is nonzero, the device should be | |
381 | * able to wake up the system from this sleep state. If @d_min_p is set, | |
382 | * the highest power (lowest number) device power state of @dev allowed | |
383 | * in this system sleep state is stored at the location pointed to by it. | |
384 | * | |
385 | * The caller must ensure that @dev is valid before using this function. | |
386 | * The caller is also responsible for figuring out if the device is | |
387 | * supposed to be able to wake up the system and passing this information | |
388 | * via @wake. | |
389 | */ | |
390 | ||
391 | int acpi_pm_device_sleep_state(struct device *dev, int wake, int *d_min_p) | |
392 | { | |
393 | acpi_handle handle = DEVICE_ACPI_HANDLE(dev); | |
394 | struct acpi_device *adev; | |
395 | char acpi_method[] = "_SxD"; | |
396 | unsigned long d_min, d_max; | |
397 | ||
398 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
ead77594 | 399 | printk(KERN_DEBUG "ACPI handle has no context!\n"); |
fd4aff1a SL |
400 | return -ENODEV; |
401 | } | |
402 | ||
403 | acpi_method[2] = '0' + acpi_target_sleep_state; | |
404 | /* | |
405 | * If the sleep state is S0, we will return D3, but if the device has | |
406 | * _S0W, we will use the value from _S0W | |
407 | */ | |
408 | d_min = ACPI_STATE_D0; | |
409 | d_max = ACPI_STATE_D3; | |
410 | ||
411 | /* | |
412 | * If present, _SxD methods return the minimum D-state (highest power | |
413 | * state) we can use for the corresponding S-states. Otherwise, the | |
414 | * minimum D-state is D0 (ACPI 3.x). | |
415 | * | |
416 | * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer | |
417 | * provided -- that's our fault recovery, we ignore retval. | |
418 | */ | |
419 | if (acpi_target_sleep_state > ACPI_STATE_S0) | |
420 | acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); | |
421 | ||
422 | /* | |
423 | * If _PRW says we can wake up the system from the target sleep state, | |
424 | * the D-state returned by _SxD is sufficient for that (we assume a | |
425 | * wakeup-aware driver if wake is set). Still, if _SxW exists | |
426 | * (ACPI 3.x), it should return the maximum (lowest power) D-state that | |
427 | * can wake the system. _S0W may be valid, too. | |
428 | */ | |
429 | if (acpi_target_sleep_state == ACPI_STATE_S0 || | |
430 | (wake && adev->wakeup.state.enabled && | |
431 | adev->wakeup.sleep_state <= acpi_target_sleep_state)) { | |
ad3399c3 RW |
432 | acpi_status status; |
433 | ||
fd4aff1a | 434 | acpi_method[3] = 'W'; |
ad3399c3 RW |
435 | status = acpi_evaluate_integer(handle, acpi_method, NULL, |
436 | &d_max); | |
437 | if (ACPI_FAILURE(status)) { | |
438 | d_max = d_min; | |
439 | } else if (d_max < d_min) { | |
440 | /* Warn the user of the broken DSDT */ | |
441 | printk(KERN_WARNING "ACPI: Wrong value from %s\n", | |
442 | acpi_method); | |
443 | /* Sanitize it */ | |
fd4aff1a | 444 | d_min = d_max; |
ad3399c3 | 445 | } |
fd4aff1a SL |
446 | } |
447 | ||
448 | if (d_min_p) | |
449 | *d_min_p = d_min; | |
450 | return d_max; | |
451 | } | |
853298bc | 452 | #endif |
fd4aff1a | 453 | |
f216cc37 AS |
454 | static void acpi_power_off_prepare(void) |
455 | { | |
456 | /* Prepare to power off the system */ | |
457 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3c1d2b60 | 458 | acpi_hw_disable_all_gpes(); |
f216cc37 AS |
459 | } |
460 | ||
461 | static void acpi_power_off(void) | |
462 | { | |
463 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
96b2dd1f | 464 | printk("%s called\n", __func__); |
f216cc37 | 465 | local_irq_disable(); |
9c1c6a1b | 466 | acpi_enable_wakeup_device(ACPI_STATE_S5); |
f216cc37 AS |
467 | acpi_enter_sleep_state(ACPI_STATE_S5); |
468 | } | |
469 | ||
aafbcd16 | 470 | int __init acpi_sleep_init(void) |
1da177e4 | 471 | { |
296699de RW |
472 | acpi_status status; |
473 | u8 type_a, type_b; | |
474 | #ifdef CONFIG_SUSPEND | |
e2a5b420 | 475 | int i = 0; |
1da177e4 LT |
476 | |
477 | dmi_check_system(acpisleep_dmi_table); | |
296699de | 478 | #endif |
1da177e4 LT |
479 | |
480 | if (acpi_disabled) | |
481 | return 0; | |
482 | ||
5a50fe70 FP |
483 | sleep_states[ACPI_STATE_S0] = 1; |
484 | printk(KERN_INFO PREFIX "(supports S0"); | |
485 | ||
296699de | 486 | #ifdef CONFIG_SUSPEND |
5a50fe70 | 487 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { |
1da177e4 LT |
488 | status = acpi_get_sleep_type_data(i, &type_a, &type_b); |
489 | if (ACPI_SUCCESS(status)) { | |
490 | sleep_states[i] = 1; | |
491 | printk(" S%d", i); | |
492 | } | |
1da177e4 | 493 | } |
1da177e4 | 494 | |
2c6e33c3 | 495 | suspend_set_ops(&acpi_suspend_ops); |
296699de | 496 | #endif |
a3d25c27 | 497 | |
b0cb1a19 | 498 | #ifdef CONFIG_HIBERNATION |
296699de RW |
499 | status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); |
500 | if (ACPI_SUCCESS(status)) { | |
a3d25c27 | 501 | hibernation_set_ops(&acpi_hibernation_ops); |
296699de | 502 | sleep_states[ACPI_STATE_S4] = 1; |
f216cc37 | 503 | printk(" S4"); |
296699de | 504 | } |
a3d25c27 | 505 | #endif |
f216cc37 AS |
506 | status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
507 | if (ACPI_SUCCESS(status)) { | |
508 | sleep_states[ACPI_STATE_S5] = 1; | |
509 | printk(" S5"); | |
510 | pm_power_off_prepare = acpi_power_off_prepare; | |
511 | pm_power_off = acpi_power_off; | |
512 | } | |
513 | printk(")\n"); | |
1da177e4 LT |
514 | return 0; |
515 | } |