Commit | Line | Data |
---|---|---|
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 | } | |
4b4f7280 PA |
35 | acpi_set_firmware_waking_vector( |
36 | (acpi_physical_address)acpi_wakeup_address); | |
2f3f2226 AS |
37 | |
38 | } | |
39 | ACPI_FLUSH_CPU_CACHE(); | |
40 | acpi_enable_wakeup_device_prep(acpi_state); | |
41 | #endif | |
c9b6c8f6 RW |
42 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
43 | acpi_state); | |
2f3f2226 AS |
44 | acpi_enter_sleep_state_prep(acpi_state); |
45 | return 0; | |
46 | } | |
47 | ||
d8f3de0d RW |
48 | #ifdef CONFIG_PM_SLEEP |
49 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; | |
50 | ||
51 | /* | |
52 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
53 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
54 | * kernel command line option that causes the following variable to be set. | |
55 | */ | |
56 | static bool old_suspend_ordering; | |
57 | ||
58 | void __init acpi_old_suspend_ordering(void) | |
59 | { | |
60 | old_suspend_ordering = true; | |
61 | } | |
62 | ||
63 | /** | |
64 | * acpi_pm_disable_gpes - Disable the GPEs. | |
65 | */ | |
66 | static int acpi_pm_disable_gpes(void) | |
67 | { | |
68 | acpi_hw_disable_all_gpes(); | |
69 | return 0; | |
70 | } | |
71 | ||
72 | /** | |
73 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
74 | * | |
75 | * If necessary, set the firmware waking vector and do arch-specific | |
76 | * nastiness to get the wakeup code to the waking vector. | |
77 | */ | |
78 | static int __acpi_pm_prepare(void) | |
79 | { | |
80 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
81 | ||
82 | if (error) | |
83 | acpi_target_sleep_state = ACPI_STATE_S0; | |
84 | return error; | |
85 | } | |
86 | ||
87 | /** | |
88 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
89 | * state and disable the GPEs. | |
90 | */ | |
91 | static int acpi_pm_prepare(void) | |
92 | { | |
93 | int error = __acpi_pm_prepare(); | |
94 | ||
95 | if (!error) | |
96 | acpi_hw_disable_all_gpes(); | |
97 | return error; | |
98 | } | |
99 | ||
100 | /** | |
101 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
102 | * | |
103 | * This is called after we wake back up (or if entering the sleep state | |
104 | * failed). | |
105 | */ | |
106 | static void acpi_pm_finish(void) | |
107 | { | |
108 | u32 acpi_state = acpi_target_sleep_state; | |
109 | ||
110 | if (acpi_state == ACPI_STATE_S0) | |
111 | return; | |
1da177e4 | 112 | |
d8f3de0d RW |
113 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
114 | acpi_state); | |
115 | acpi_disable_wakeup_device(acpi_state); | |
116 | acpi_leave_sleep_state(acpi_state); | |
117 | ||
118 | /* reset firmware waking vector */ | |
119 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
120 | ||
121 | acpi_target_sleep_state = ACPI_STATE_S0; | |
122 | } | |
123 | ||
124 | /** | |
125 | * acpi_pm_end - Finish up suspend sequence. | |
126 | */ | |
127 | static void acpi_pm_end(void) | |
128 | { | |
129 | /* | |
130 | * This is necessary in case acpi_pm_finish() is not called during a | |
131 | * failing transition to a sleep state. | |
132 | */ | |
133 | acpi_target_sleep_state = ACPI_STATE_S0; | |
134 | } | |
135 | #endif /* CONFIG_PM_SLEEP */ | |
1da177e4 | 136 | |
d8f3de0d | 137 | #ifdef CONFIG_SUSPEND |
1da177e4 LT |
138 | extern void do_suspend_lowlevel(void); |
139 | ||
140 | static u32 acpi_suspend_states[] = { | |
e2a5b420 AS |
141 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
142 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
143 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 144 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
145 | }; |
146 | ||
e9b3aba8 | 147 | /** |
2c6e33c3 | 148 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
149 | * associated with given @pm_state, if supported. |
150 | */ | |
2c6e33c3 | 151 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
152 | { |
153 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
154 | int error = 0; | |
155 | ||
156 | if (sleep_states[acpi_state]) { | |
157 | acpi_target_sleep_state = acpi_state; | |
158 | } else { | |
159 | printk(KERN_ERR "ACPI does not support this state: %d\n", | |
160 | pm_state); | |
161 | error = -ENOSYS; | |
162 | } | |
163 | return error; | |
164 | } | |
165 | ||
1da177e4 | 166 | /** |
2c6e33c3 | 167 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 168 | * @pm_state: ignored |
1da177e4 | 169 | * |
50ad147a RW |
170 | * Flush caches and go to sleep. For STR we have to call arch-specific |
171 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
172 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
173 | */ | |
2c6e33c3 | 174 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
175 | { |
176 | acpi_status status = AE_OK; | |
177 | unsigned long flags = 0; | |
e9b3aba8 | 178 | u32 acpi_state = acpi_target_sleep_state; |
1da177e4 LT |
179 | |
180 | ACPI_FLUSH_CPU_CACHE(); | |
181 | ||
182 | /* Do arch specific saving of state. */ | |
50ad147a | 183 | if (acpi_state == ACPI_STATE_S3) { |
1da177e4 | 184 | int error = acpi_save_state_mem(); |
e9b3aba8 | 185 | |
60417f59 | 186 | if (error) |
1da177e4 LT |
187 | return error; |
188 | } | |
189 | ||
1da177e4 LT |
190 | local_irq_save(flags); |
191 | acpi_enable_wakeup_device(acpi_state); | |
e9b3aba8 RW |
192 | switch (acpi_state) { |
193 | case ACPI_STATE_S1: | |
1da177e4 LT |
194 | barrier(); |
195 | status = acpi_enter_sleep_state(acpi_state); | |
196 | break; | |
197 | ||
e9b3aba8 | 198 | case ACPI_STATE_S3: |
1da177e4 LT |
199 | do_suspend_lowlevel(); |
200 | break; | |
1da177e4 | 201 | } |
872d83d0 | 202 | |
c95d47a8 RW |
203 | /* Reprogram control registers and execute _BFS */ |
204 | acpi_leave_sleep_state_prep(acpi_state); | |
205 | ||
23b168d4 | 206 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
207 | * of the OSPM to clear the status bit [ implying that the |
208 | * POWER_BUTTON event should not reach userspace ] | |
209 | */ | |
210 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) | |
211 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
212 | ||
a3627f67 SL |
213 | /* |
214 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
215 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
216 | * acpi_leave_sleep_state will reenable specific GPEs later | |
217 | */ | |
218 | acpi_hw_disable_all_gpes(); | |
219 | ||
1da177e4 LT |
220 | local_irq_restore(flags); |
221 | printk(KERN_DEBUG "Back to C!\n"); | |
222 | ||
e9b3aba8 | 223 | /* restore processor state */ |
50ad147a | 224 | if (acpi_state == ACPI_STATE_S3) |
1da177e4 LT |
225 | acpi_restore_state_mem(); |
226 | ||
1da177e4 LT |
227 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
228 | } | |
229 | ||
2c6e33c3 | 230 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 231 | { |
e8c9c502 | 232 | u32 acpi_state; |
eb9289eb | 233 | |
e8c9c502 JB |
234 | switch (pm_state) { |
235 | case PM_SUSPEND_ON: | |
236 | case PM_SUSPEND_STANDBY: | |
237 | case PM_SUSPEND_MEM: | |
238 | acpi_state = acpi_suspend_states[pm_state]; | |
239 | ||
240 | return sleep_states[acpi_state]; | |
241 | default: | |
242 | return 0; | |
243 | } | |
eb9289eb SL |
244 | } |
245 | ||
2c6e33c3 LB |
246 | static struct platform_suspend_ops acpi_suspend_ops = { |
247 | .valid = acpi_suspend_state_valid, | |
248 | .begin = acpi_suspend_begin, | |
d8f3de0d | 249 | .prepare = acpi_pm_prepare, |
2c6e33c3 | 250 | .enter = acpi_suspend_enter, |
d8f3de0d RW |
251 | .finish = acpi_pm_finish, |
252 | .end = acpi_pm_end, | |
253 | }; | |
254 | ||
255 | /** | |
256 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
257 | * state associated with given @pm_state, if supported, and | |
258 | * execute the _PTS control method. This function is used if the | |
259 | * pre-ACPI 2.0 suspend ordering has been requested. | |
260 | */ | |
261 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
262 | { | |
263 | int error = acpi_suspend_begin(pm_state); | |
264 | ||
265 | if (!error) | |
266 | error = __acpi_pm_prepare(); | |
267 | return error; | |
268 | } | |
269 | ||
270 | /* | |
271 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
272 | * been requested. | |
273 | */ | |
274 | static struct platform_suspend_ops acpi_suspend_ops_old = { | |
275 | .valid = acpi_suspend_state_valid, | |
276 | .begin = acpi_suspend_begin_old, | |
277 | .prepare = acpi_pm_disable_gpes, | |
2c6e33c3 | 278 | .enter = acpi_suspend_enter, |
d8f3de0d RW |
279 | .finish = acpi_pm_finish, |
280 | .end = acpi_pm_end, | |
281 | .recover = acpi_pm_finish, | |
1da177e4 | 282 | }; |
e41fb7c5 CC |
283 | |
284 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) | |
285 | { | |
286 | old_suspend_ordering = true; | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static struct dmi_system_id __initdata acpisleep_dmi_table[] = { | |
291 | { | |
292 | .callback = init_old_suspend_ordering, | |
293 | .ident = "Abit KN9 (nForce4 variant)", | |
294 | .matches = { | |
295 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
296 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
297 | }, | |
298 | }, | |
299 | {}, | |
300 | }; | |
296699de RW |
301 | #endif /* CONFIG_SUSPEND */ |
302 | ||
b0cb1a19 | 303 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
304 | static unsigned long s4_hardware_signature; |
305 | static struct acpi_table_facs *facs; | |
306 | static bool nosigcheck; | |
307 | ||
308 | void __init acpi_no_s4_hw_signature(void) | |
309 | { | |
310 | nosigcheck = true; | |
311 | } | |
312 | ||
caea99ef | 313 | static int acpi_hibernation_begin(void) |
74f270af RW |
314 | { |
315 | acpi_target_sleep_state = ACPI_STATE_S4; | |
7731ce63 | 316 | return 0; |
74f270af RW |
317 | } |
318 | ||
a3d25c27 RW |
319 | static int acpi_hibernation_enter(void) |
320 | { | |
321 | acpi_status status = AE_OK; | |
322 | unsigned long flags = 0; | |
323 | ||
324 | ACPI_FLUSH_CPU_CACHE(); | |
325 | ||
326 | local_irq_save(flags); | |
327 | acpi_enable_wakeup_device(ACPI_STATE_S4); | |
328 | /* This shouldn't return. If it returns, we have a problem */ | |
329 | status = acpi_enter_sleep_state(ACPI_STATE_S4); | |
c95d47a8 RW |
330 | /* Reprogram control registers and execute _BFS */ |
331 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
332 | local_irq_restore(flags); |
333 | ||
334 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
335 | } | |
336 | ||
c7e0831d RW |
337 | static void acpi_hibernation_leave(void) |
338 | { | |
339 | /* | |
340 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
341 | * enable it here. | |
342 | */ | |
343 | acpi_enable(); | |
c95d47a8 RW |
344 | /* Reprogram control registers and execute _BFS */ |
345 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c SL |
346 | /* Check the hardware signature */ |
347 | if (facs && s4_hardware_signature != facs->hardware_signature) { | |
348 | printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " | |
349 | "cannot resume!\n"); | |
350 | panic("ACPI S4 hardware signature mismatch"); | |
351 | } | |
c7e0831d RW |
352 | } |
353 | ||
d8f3de0d | 354 | static void acpi_pm_enable_gpes(void) |
a3d25c27 | 355 | { |
d8f3de0d | 356 | acpi_hw_enable_all_runtime_gpes(); |
a3d25c27 RW |
357 | } |
358 | ||
d8f3de0d RW |
359 | static struct platform_hibernation_ops acpi_hibernation_ops = { |
360 | .begin = acpi_hibernation_begin, | |
361 | .end = acpi_pm_end, | |
362 | .pre_snapshot = acpi_pm_prepare, | |
363 | .finish = acpi_pm_finish, | |
364 | .prepare = acpi_pm_prepare, | |
365 | .enter = acpi_hibernation_enter, | |
366 | .leave = acpi_hibernation_leave, | |
367 | .pre_restore = acpi_pm_disable_gpes, | |
368 | .restore_cleanup = acpi_pm_enable_gpes, | |
369 | }; | |
caea99ef | 370 | |
d8f3de0d RW |
371 | /** |
372 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
373 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
374 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
375 | * requested. | |
376 | */ | |
377 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 378 | { |
d8f3de0d | 379 | int error = acpi_sleep_prepare(ACPI_STATE_S4); |
a634cc10 | 380 | |
d8f3de0d RW |
381 | if (!error) |
382 | acpi_target_sleep_state = ACPI_STATE_S4; | |
383 | return error; | |
a634cc10 RW |
384 | } |
385 | ||
d8f3de0d RW |
386 | /* |
387 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
388 | * been requested. | |
389 | */ | |
390 | static struct platform_hibernation_ops acpi_hibernation_ops_old = { | |
391 | .begin = acpi_hibernation_begin_old, | |
392 | .end = acpi_pm_end, | |
393 | .pre_snapshot = acpi_pm_disable_gpes, | |
394 | .finish = acpi_pm_finish, | |
395 | .prepare = acpi_pm_disable_gpes, | |
a3d25c27 | 396 | .enter = acpi_hibernation_enter, |
c7e0831d | 397 | .leave = acpi_hibernation_leave, |
d8f3de0d RW |
398 | .pre_restore = acpi_pm_disable_gpes, |
399 | .restore_cleanup = acpi_pm_enable_gpes, | |
400 | .recover = acpi_pm_finish, | |
a3d25c27 | 401 | }; |
d8f3de0d | 402 | #endif /* CONFIG_HIBERNATION */ |
a3d25c27 | 403 | |
296699de RW |
404 | int acpi_suspend(u32 acpi_state) |
405 | { | |
406 | suspend_state_t states[] = { | |
407 | [1] = PM_SUSPEND_STANDBY, | |
408 | [3] = PM_SUSPEND_MEM, | |
409 | [5] = PM_SUSPEND_MAX | |
410 | }; | |
411 | ||
412 | if (acpi_state < 6 && states[acpi_state]) | |
413 | return pm_suspend(states[acpi_state]); | |
414 | if (acpi_state == 4) | |
415 | return hibernate(); | |
416 | return -EINVAL; | |
417 | } | |
418 | ||
853298bc | 419 | #ifdef CONFIG_PM_SLEEP |
fd4aff1a SL |
420 | /** |
421 | * acpi_pm_device_sleep_state - return preferred power state of ACPI device | |
422 | * in the system sleep state given by %acpi_target_sleep_state | |
2fe2de5f DB |
423 | * @dev: device to examine; its driver model wakeup flags control |
424 | * whether it should be able to wake up the system | |
fd4aff1a SL |
425 | * @d_min_p: used to store the upper limit of allowed states range |
426 | * Return value: preferred power state of the device on success, -ENODEV on | |
427 | * failure (ie. if there's no 'struct acpi_device' for @dev) | |
428 | * | |
429 | * Find the lowest power (highest number) ACPI device power state that | |
430 | * device @dev can be in while the system is in the sleep state represented | |
431 | * by %acpi_target_sleep_state. If @wake is nonzero, the device should be | |
432 | * able to wake up the system from this sleep state. If @d_min_p is set, | |
433 | * the highest power (lowest number) device power state of @dev allowed | |
434 | * in this system sleep state is stored at the location pointed to by it. | |
435 | * | |
436 | * The caller must ensure that @dev is valid before using this function. | |
437 | * The caller is also responsible for figuring out if the device is | |
438 | * supposed to be able to wake up the system and passing this information | |
439 | * via @wake. | |
440 | */ | |
441 | ||
2fe2de5f | 442 | int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p) |
fd4aff1a SL |
443 | { |
444 | acpi_handle handle = DEVICE_ACPI_HANDLE(dev); | |
445 | struct acpi_device *adev; | |
446 | char acpi_method[] = "_SxD"; | |
447 | unsigned long d_min, d_max; | |
448 | ||
449 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
ead77594 | 450 | printk(KERN_DEBUG "ACPI handle has no context!\n"); |
fd4aff1a SL |
451 | return -ENODEV; |
452 | } | |
453 | ||
454 | acpi_method[2] = '0' + acpi_target_sleep_state; | |
455 | /* | |
456 | * If the sleep state is S0, we will return D3, but if the device has | |
457 | * _S0W, we will use the value from _S0W | |
458 | */ | |
459 | d_min = ACPI_STATE_D0; | |
460 | d_max = ACPI_STATE_D3; | |
461 | ||
462 | /* | |
463 | * If present, _SxD methods return the minimum D-state (highest power | |
464 | * state) we can use for the corresponding S-states. Otherwise, the | |
465 | * minimum D-state is D0 (ACPI 3.x). | |
466 | * | |
467 | * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer | |
468 | * provided -- that's our fault recovery, we ignore retval. | |
469 | */ | |
470 | if (acpi_target_sleep_state > ACPI_STATE_S0) | |
471 | acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); | |
472 | ||
473 | /* | |
474 | * If _PRW says we can wake up the system from the target sleep state, | |
475 | * the D-state returned by _SxD is sufficient for that (we assume a | |
476 | * wakeup-aware driver if wake is set). Still, if _SxW exists | |
477 | * (ACPI 3.x), it should return the maximum (lowest power) D-state that | |
478 | * can wake the system. _S0W may be valid, too. | |
479 | */ | |
480 | if (acpi_target_sleep_state == ACPI_STATE_S0 || | |
2fe2de5f | 481 | (device_may_wakeup(dev) && adev->wakeup.state.enabled && |
fd4aff1a | 482 | adev->wakeup.sleep_state <= acpi_target_sleep_state)) { |
ad3399c3 RW |
483 | acpi_status status; |
484 | ||
fd4aff1a | 485 | acpi_method[3] = 'W'; |
ad3399c3 RW |
486 | status = acpi_evaluate_integer(handle, acpi_method, NULL, |
487 | &d_max); | |
488 | if (ACPI_FAILURE(status)) { | |
489 | d_max = d_min; | |
490 | } else if (d_max < d_min) { | |
491 | /* Warn the user of the broken DSDT */ | |
492 | printk(KERN_WARNING "ACPI: Wrong value from %s\n", | |
493 | acpi_method); | |
494 | /* Sanitize it */ | |
fd4aff1a | 495 | d_min = d_max; |
ad3399c3 | 496 | } |
fd4aff1a SL |
497 | } |
498 | ||
499 | if (d_min_p) | |
500 | *d_min_p = d_min; | |
501 | return d_max; | |
502 | } | |
eb9d0fe4 RW |
503 | |
504 | /** | |
505 | * acpi_pm_device_sleep_wake - enable or disable the system wake-up | |
506 | * capability of given device | |
507 | * @dev: device to handle | |
508 | * @enable: 'true' - enable, 'false' - disable the wake-up capability | |
509 | */ | |
510 | int acpi_pm_device_sleep_wake(struct device *dev, bool enable) | |
511 | { | |
512 | acpi_handle handle; | |
513 | struct acpi_device *adev; | |
514 | ||
515 | if (!device_may_wakeup(dev)) | |
516 | return -EINVAL; | |
517 | ||
518 | handle = DEVICE_ACPI_HANDLE(dev); | |
519 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
520 | printk(KERN_DEBUG "ACPI handle has no context!\n"); | |
521 | return -ENODEV; | |
522 | } | |
523 | ||
524 | return enable ? | |
525 | acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) : | |
526 | acpi_disable_wakeup_device_power(adev); | |
527 | } | |
853298bc | 528 | #endif |
fd4aff1a | 529 | |
f216cc37 AS |
530 | static void acpi_power_off_prepare(void) |
531 | { | |
532 | /* Prepare to power off the system */ | |
533 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3c1d2b60 | 534 | acpi_hw_disable_all_gpes(); |
f216cc37 AS |
535 | } |
536 | ||
537 | static void acpi_power_off(void) | |
538 | { | |
539 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
96b2dd1f | 540 | printk("%s called\n", __func__); |
f216cc37 | 541 | local_irq_disable(); |
9c1c6a1b | 542 | acpi_enable_wakeup_device(ACPI_STATE_S5); |
f216cc37 AS |
543 | acpi_enter_sleep_state(ACPI_STATE_S5); |
544 | } | |
545 | ||
aafbcd16 | 546 | int __init acpi_sleep_init(void) |
1da177e4 | 547 | { |
296699de RW |
548 | acpi_status status; |
549 | u8 type_a, type_b; | |
550 | #ifdef CONFIG_SUSPEND | |
e2a5b420 | 551 | int i = 0; |
e41fb7c5 CC |
552 | |
553 | dmi_check_system(acpisleep_dmi_table); | |
296699de | 554 | #endif |
1da177e4 LT |
555 | |
556 | if (acpi_disabled) | |
557 | return 0; | |
558 | ||
5a50fe70 FP |
559 | sleep_states[ACPI_STATE_S0] = 1; |
560 | printk(KERN_INFO PREFIX "(supports S0"); | |
561 | ||
296699de | 562 | #ifdef CONFIG_SUSPEND |
5a50fe70 | 563 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { |
1da177e4 LT |
564 | status = acpi_get_sleep_type_data(i, &type_a, &type_b); |
565 | if (ACPI_SUCCESS(status)) { | |
566 | sleep_states[i] = 1; | |
567 | printk(" S%d", i); | |
568 | } | |
1da177e4 | 569 | } |
1da177e4 | 570 | |
d8f3de0d RW |
571 | suspend_set_ops(old_suspend_ordering ? |
572 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
296699de | 573 | #endif |
a3d25c27 | 574 | |
b0cb1a19 | 575 | #ifdef CONFIG_HIBERNATION |
296699de RW |
576 | status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); |
577 | if (ACPI_SUCCESS(status)) { | |
d8f3de0d RW |
578 | hibernation_set_ops(old_suspend_ordering ? |
579 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
296699de | 580 | sleep_states[ACPI_STATE_S4] = 1; |
f216cc37 | 581 | printk(" S4"); |
bdfe6b7c SL |
582 | if (!nosigcheck) { |
583 | acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS, | |
584 | (struct acpi_table_header **)&facs); | |
585 | if (facs) | |
586 | s4_hardware_signature = | |
587 | facs->hardware_signature; | |
588 | } | |
296699de | 589 | } |
a3d25c27 | 590 | #endif |
f216cc37 AS |
591 | status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
592 | if (ACPI_SUCCESS(status)) { | |
593 | sleep_states[ACPI_STATE_S5] = 1; | |
594 | printk(" S5"); | |
595 | pm_power_off_prepare = acpi_power_off_prepare; | |
596 | pm_power_off = acpi_power_off; | |
597 | } | |
598 | printk(")\n"); | |
1da177e4 LT |
599 | return 0; |
600 | } |