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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> |
f216cc37 AS |
19 | |
20 | #include <asm/io.h> | |
21 | ||
1da177e4 LT |
22 | #include <acpi/acpi_bus.h> |
23 | #include <acpi/acpi_drivers.h> | |
e60cc7a6 BH |
24 | |
25 | #include "internal.h" | |
1da177e4 LT |
26 | #include "sleep.h" |
27 | ||
28 | u8 sleep_states[ACPI_S_STATE_COUNT]; | |
29 | ||
e49f711c ZY |
30 | static void acpi_sleep_tts_switch(u32 acpi_state) |
31 | { | |
32 | union acpi_object in_arg = { ACPI_TYPE_INTEGER }; | |
33 | struct acpi_object_list arg_list = { 1, &in_arg }; | |
34 | acpi_status status = AE_OK; | |
35 | ||
36 | in_arg.integer.value = acpi_state; | |
37 | status = acpi_evaluate_object(NULL, "\\_TTS", &arg_list, NULL); | |
38 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
39 | /* | |
40 | * OS can't evaluate the _TTS object correctly. Some warning | |
41 | * message will be printed. But it won't break anything. | |
42 | */ | |
43 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); | |
44 | } | |
45 | } | |
46 | ||
47 | static int tts_notify_reboot(struct notifier_block *this, | |
48 | unsigned long code, void *x) | |
49 | { | |
50 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
51 | return NOTIFY_DONE; | |
52 | } | |
53 | ||
54 | static struct notifier_block tts_notifier = { | |
55 | .notifier_call = tts_notify_reboot, | |
56 | .next = NULL, | |
57 | .priority = 0, | |
58 | }; | |
59 | ||
c9b6c8f6 | 60 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
61 | { |
62 | #ifdef CONFIG_ACPI_SLEEP | |
63 | /* do we have a wakeup address for S2 and S3? */ | |
64 | if (acpi_state == ACPI_STATE_S3) { | |
65 | if (!acpi_wakeup_address) { | |
66 | return -EFAULT; | |
67 | } | |
4b4f7280 PA |
68 | acpi_set_firmware_waking_vector( |
69 | (acpi_physical_address)acpi_wakeup_address); | |
2f3f2226 AS |
70 | |
71 | } | |
72 | ACPI_FLUSH_CPU_CACHE(); | |
73 | acpi_enable_wakeup_device_prep(acpi_state); | |
74 | #endif | |
c9b6c8f6 RW |
75 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
76 | acpi_state); | |
2f3f2226 AS |
77 | acpi_enter_sleep_state_prep(acpi_state); |
78 | return 0; | |
79 | } | |
80 | ||
5d1e072b | 81 | #ifdef CONFIG_ACPI_SLEEP |
b849075c | 82 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
d7f0eea9 ZR |
83 | /* |
84 | * According to the ACPI specification the BIOS should make sure that ACPI is | |
85 | * enabled and SCI_EN bit is set on wake-up from S1 - S3 sleep states. Still, | |
86 | * some BIOSes don't do that and therefore we use acpi_enable() to enable ACPI | |
87 | * on such systems during resume. Unfortunately that doesn't help in | |
88 | * particularly pathological cases in which SCI_EN has to be set directly on | |
89 | * resume, although the specification states very clearly that this flag is | |
90 | * owned by the hardware. The set_sci_en_on_resume variable will be set in such | |
91 | * cases. | |
92 | */ | |
93 | static bool set_sci_en_on_resume; | |
94 | ||
95 | void __init acpi_set_sci_en_on_resume(void) | |
96 | { | |
97 | set_sci_en_on_resume = true; | |
98 | } | |
99 | ||
d8f3de0d RW |
100 | /* |
101 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
102 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
103 | * kernel command line option that causes the following variable to be set. | |
104 | */ | |
105 | static bool old_suspend_ordering; | |
106 | ||
107 | void __init acpi_old_suspend_ordering(void) | |
108 | { | |
109 | old_suspend_ordering = true; | |
110 | } | |
111 | ||
112 | /** | |
113 | * acpi_pm_disable_gpes - Disable the GPEs. | |
114 | */ | |
115 | static int acpi_pm_disable_gpes(void) | |
116 | { | |
3d97e426 | 117 | acpi_disable_all_gpes(); |
d8f3de0d RW |
118 | return 0; |
119 | } | |
120 | ||
121 | /** | |
122 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
123 | * | |
124 | * If necessary, set the firmware waking vector and do arch-specific | |
125 | * nastiness to get the wakeup code to the waking vector. | |
126 | */ | |
127 | static int __acpi_pm_prepare(void) | |
128 | { | |
129 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
130 | ||
131 | if (error) | |
132 | acpi_target_sleep_state = ACPI_STATE_S0; | |
133 | return error; | |
134 | } | |
135 | ||
136 | /** | |
137 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
138 | * state and disable the GPEs. | |
139 | */ | |
140 | static int acpi_pm_prepare(void) | |
141 | { | |
142 | int error = __acpi_pm_prepare(); | |
143 | ||
144 | if (!error) | |
3d97e426 | 145 | acpi_disable_all_gpes(); |
d8f3de0d RW |
146 | return error; |
147 | } | |
148 | ||
149 | /** | |
150 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
151 | * | |
152 | * This is called after we wake back up (or if entering the sleep state | |
153 | * failed). | |
154 | */ | |
155 | static void acpi_pm_finish(void) | |
156 | { | |
157 | u32 acpi_state = acpi_target_sleep_state; | |
158 | ||
159 | if (acpi_state == ACPI_STATE_S0) | |
160 | return; | |
1da177e4 | 161 | |
d8f3de0d RW |
162 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
163 | acpi_state); | |
164 | acpi_disable_wakeup_device(acpi_state); | |
165 | acpi_leave_sleep_state(acpi_state); | |
166 | ||
167 | /* reset firmware waking vector */ | |
168 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
169 | ||
170 | acpi_target_sleep_state = ACPI_STATE_S0; | |
171 | } | |
172 | ||
173 | /** | |
174 | * acpi_pm_end - Finish up suspend sequence. | |
175 | */ | |
176 | static void acpi_pm_end(void) | |
177 | { | |
178 | /* | |
179 | * This is necessary in case acpi_pm_finish() is not called during a | |
180 | * failing transition to a sleep state. | |
181 | */ | |
182 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 183 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 184 | } |
92daa7b5 RW |
185 | #else /* !CONFIG_ACPI_SLEEP */ |
186 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
5d1e072b | 187 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 188 | |
d8f3de0d | 189 | #ifdef CONFIG_SUSPEND |
1da177e4 LT |
190 | extern void do_suspend_lowlevel(void); |
191 | ||
192 | static u32 acpi_suspend_states[] = { | |
e2a5b420 AS |
193 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
194 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
195 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 196 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
197 | }; |
198 | ||
e9b3aba8 | 199 | /** |
2c6e33c3 | 200 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
201 | * associated with given @pm_state, if supported. |
202 | */ | |
2c6e33c3 | 203 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
204 | { |
205 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
206 | int error = 0; | |
207 | ||
208 | if (sleep_states[acpi_state]) { | |
209 | acpi_target_sleep_state = acpi_state; | |
e49f711c | 210 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
e9b3aba8 RW |
211 | } else { |
212 | printk(KERN_ERR "ACPI does not support this state: %d\n", | |
213 | pm_state); | |
214 | error = -ENOSYS; | |
215 | } | |
216 | return error; | |
217 | } | |
218 | ||
1da177e4 | 219 | /** |
2c6e33c3 | 220 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 221 | * @pm_state: ignored |
1da177e4 | 222 | * |
50ad147a RW |
223 | * Flush caches and go to sleep. For STR we have to call arch-specific |
224 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
225 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
226 | */ | |
2c6e33c3 | 227 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
228 | { |
229 | acpi_status status = AE_OK; | |
230 | unsigned long flags = 0; | |
e9b3aba8 | 231 | u32 acpi_state = acpi_target_sleep_state; |
1da177e4 LT |
232 | |
233 | ACPI_FLUSH_CPU_CACHE(); | |
234 | ||
235 | /* Do arch specific saving of state. */ | |
50ad147a | 236 | if (acpi_state == ACPI_STATE_S3) { |
1da177e4 | 237 | int error = acpi_save_state_mem(); |
e9b3aba8 | 238 | |
60417f59 | 239 | if (error) |
1da177e4 LT |
240 | return error; |
241 | } | |
242 | ||
1da177e4 LT |
243 | local_irq_save(flags); |
244 | acpi_enable_wakeup_device(acpi_state); | |
e9b3aba8 RW |
245 | switch (acpi_state) { |
246 | case ACPI_STATE_S1: | |
1da177e4 LT |
247 | barrier(); |
248 | status = acpi_enter_sleep_state(acpi_state); | |
249 | break; | |
250 | ||
e9b3aba8 | 251 | case ACPI_STATE_S3: |
1da177e4 LT |
252 | do_suspend_lowlevel(); |
253 | break; | |
1da177e4 | 254 | } |
872d83d0 | 255 | |
d0c71fe7 | 256 | /* If ACPI is not enabled by the BIOS, we need to enable it here. */ |
65df7847 | 257 | if (set_sci_en_on_resume) |
50ffba1b | 258 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); |
65df7847 RW |
259 | else |
260 | acpi_enable(); | |
261 | ||
c95d47a8 RW |
262 | /* Reprogram control registers and execute _BFS */ |
263 | acpi_leave_sleep_state_prep(acpi_state); | |
264 | ||
23b168d4 | 265 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
266 | * of the OSPM to clear the status bit [ implying that the |
267 | * POWER_BUTTON event should not reach userspace ] | |
268 | */ | |
269 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) | |
270 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
271 | ||
a3627f67 SL |
272 | /* |
273 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
274 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
275 | * acpi_leave_sleep_state will reenable specific GPEs later | |
276 | */ | |
3d97e426 | 277 | acpi_disable_all_gpes(); |
a3627f67 | 278 | |
1da177e4 LT |
279 | local_irq_restore(flags); |
280 | printk(KERN_DEBUG "Back to C!\n"); | |
281 | ||
e9b3aba8 | 282 | /* restore processor state */ |
50ad147a | 283 | if (acpi_state == ACPI_STATE_S3) |
1da177e4 LT |
284 | acpi_restore_state_mem(); |
285 | ||
1da177e4 LT |
286 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
287 | } | |
288 | ||
2c6e33c3 | 289 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 290 | { |
e8c9c502 | 291 | u32 acpi_state; |
eb9289eb | 292 | |
e8c9c502 JB |
293 | switch (pm_state) { |
294 | case PM_SUSPEND_ON: | |
295 | case PM_SUSPEND_STANDBY: | |
296 | case PM_SUSPEND_MEM: | |
297 | acpi_state = acpi_suspend_states[pm_state]; | |
298 | ||
299 | return sleep_states[acpi_state]; | |
300 | default: | |
301 | return 0; | |
302 | } | |
eb9289eb SL |
303 | } |
304 | ||
2c6e33c3 LB |
305 | static struct platform_suspend_ops acpi_suspend_ops = { |
306 | .valid = acpi_suspend_state_valid, | |
307 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 308 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 309 | .enter = acpi_suspend_enter, |
6a7c7eaf | 310 | .wake = acpi_pm_finish, |
d8f3de0d RW |
311 | .end = acpi_pm_end, |
312 | }; | |
313 | ||
314 | /** | |
315 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
316 | * state associated with given @pm_state, if supported, and | |
317 | * execute the _PTS control method. This function is used if the | |
318 | * pre-ACPI 2.0 suspend ordering has been requested. | |
319 | */ | |
320 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
321 | { | |
322 | int error = acpi_suspend_begin(pm_state); | |
323 | ||
324 | if (!error) | |
325 | error = __acpi_pm_prepare(); | |
326 | return error; | |
327 | } | |
328 | ||
329 | /* | |
330 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
331 | * been requested. | |
332 | */ | |
333 | static struct platform_suspend_ops acpi_suspend_ops_old = { | |
334 | .valid = acpi_suspend_state_valid, | |
335 | .begin = acpi_suspend_begin_old, | |
6a7c7eaf | 336 | .prepare_late = acpi_pm_disable_gpes, |
2c6e33c3 | 337 | .enter = acpi_suspend_enter, |
6a7c7eaf | 338 | .wake = acpi_pm_finish, |
d8f3de0d RW |
339 | .end = acpi_pm_end, |
340 | .recover = acpi_pm_finish, | |
1da177e4 | 341 | }; |
e41fb7c5 CC |
342 | |
343 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) | |
344 | { | |
345 | old_suspend_ordering = true; | |
346 | return 0; | |
347 | } | |
348 | ||
65df7847 RW |
349 | static int __init init_set_sci_en_on_resume(const struct dmi_system_id *d) |
350 | { | |
351 | set_sci_en_on_resume = true; | |
352 | return 0; | |
353 | } | |
354 | ||
e41fb7c5 CC |
355 | static struct dmi_system_id __initdata acpisleep_dmi_table[] = { |
356 | { | |
357 | .callback = init_old_suspend_ordering, | |
358 | .ident = "Abit KN9 (nForce4 variant)", | |
359 | .matches = { | |
360 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
361 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
362 | }, | |
363 | }, | |
4fb507b6 RW |
364 | { |
365 | .callback = init_old_suspend_ordering, | |
366 | .ident = "HP xw4600 Workstation", | |
367 | .matches = { | |
368 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
369 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
370 | }, | |
371 | }, | |
65df7847 RW |
372 | { |
373 | .callback = init_set_sci_en_on_resume, | |
374 | .ident = "Apple MacBook 1,1", | |
375 | .matches = { | |
376 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."), | |
377 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook1,1"), | |
378 | }, | |
379 | }, | |
380 | { | |
381 | .callback = init_set_sci_en_on_resume, | |
382 | .ident = "Apple MacMini 1,1", | |
383 | .matches = { | |
384 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."), | |
385 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"), | |
386 | }, | |
387 | }, | |
a1404495 AW |
388 | { |
389 | .callback = init_old_suspend_ordering, | |
390 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
391 | .matches = { | |
392 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
393 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
394 | }, | |
395 | }, | |
45e77988 ZR |
396 | { |
397 | .callback = init_set_sci_en_on_resume, | |
398 | .ident = "Toshiba Satellite L300", | |
399 | .matches = { | |
400 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
401 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite L300"), | |
402 | }, | |
403 | }, | |
2a9ef8e1 | 404 | { |
ec79be26 BZ |
405 | .callback = init_set_sci_en_on_resume, |
406 | .ident = "Hewlett-Packard HP G7000 Notebook PC", | |
407 | .matches = { | |
408 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
409 | DMI_MATCH(DMI_PRODUCT_NAME, "HP G7000 Notebook PC"), | |
410 | }, | |
411 | }, | |
412 | { | |
eb0ca849 LB |
413 | .callback = init_set_sci_en_on_resume, |
414 | .ident = "Hewlett-Packard HP Pavilion dv3 Notebook PC", | |
415 | .matches = { | |
416 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
417 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv3 Notebook PC"), | |
418 | }, | |
8a1cbf64 GMDV |
419 | }, |
420 | { | |
421 | .callback = init_set_sci_en_on_resume, | |
422 | .ident = "Hewlett-Packard Pavilion dv4", | |
423 | .matches = { | |
424 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
425 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv4"), | |
426 | }, | |
2839d396 VV |
427 | }, |
428 | { | |
429 | .callback = init_set_sci_en_on_resume, | |
430 | .ident = "Hewlett-Packard Pavilion dv7", | |
431 | .matches = { | |
432 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
433 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv7"), | |
434 | }, | |
435 | }, | |
436 | { | |
437 | .callback = init_set_sci_en_on_resume, | |
87c687be LB |
438 | .ident = "Hewlett-Packard Compaq Presario C700 Notebook PC", |
439 | .matches = { | |
440 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
441 | DMI_MATCH(DMI_PRODUCT_NAME, "Compaq Presario C700 Notebook PC"), | |
442 | }, | |
443 | }, | |
444 | { | |
445 | .callback = init_set_sci_en_on_resume, | |
2839d396 VV |
446 | .ident = "Hewlett-Packard Compaq Presario CQ40 Notebook PC", |
447 | .matches = { | |
448 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
449 | DMI_MATCH(DMI_PRODUCT_NAME, "Compaq Presario CQ40 Notebook PC"), | |
450 | }, | |
eb0ca849 LB |
451 | }, |
452 | { | |
07bedca2 AC |
453 | .callback = init_set_sci_en_on_resume, |
454 | .ident = "Lenovo ThinkPad T410", | |
455 | .matches = { | |
456 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
457 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T410"), | |
458 | }, | |
459 | }, | |
460 | { | |
461 | .callback = init_set_sci_en_on_resume, | |
462 | .ident = "Lenovo ThinkPad T510", | |
463 | .matches = { | |
464 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
465 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T510"), | |
466 | }, | |
467 | }, | |
468 | { | |
469 | .callback = init_set_sci_en_on_resume, | |
470 | .ident = "Lenovo ThinkPad W510", | |
471 | .matches = { | |
472 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
473 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W510"), | |
474 | }, | |
475 | }, | |
476 | { | |
477 | .callback = init_set_sci_en_on_resume, | |
478 | .ident = "Lenovo ThinkPad X201", | |
479 | .matches = { | |
480 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
481 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201"), | |
482 | }, | |
483 | }, | |
484 | { | |
485 | .callback = init_set_sci_en_on_resume, | |
486 | .ident = "Lenovo ThinkPad X201", | |
487 | .matches = { | |
488 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
489 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"), | |
490 | }, | |
491 | }, | |
492 | { | |
493 | .callback = init_set_sci_en_on_resume, | |
494 | .ident = "Lenovo ThinkPad T410", | |
495 | .matches = { | |
496 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
497 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T410"), | |
498 | }, | |
499 | }, | |
500 | { | |
501 | .callback = init_set_sci_en_on_resume, | |
502 | .ident = "Lenovo ThinkPad T510", | |
503 | .matches = { | |
504 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
505 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T510"), | |
506 | }, | |
507 | }, | |
508 | { | |
509 | .callback = init_set_sci_en_on_resume, | |
510 | .ident = "Lenovo ThinkPad W510", | |
511 | .matches = { | |
512 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
513 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W510"), | |
514 | }, | |
515 | }, | |
516 | { | |
517 | .callback = init_set_sci_en_on_resume, | |
518 | .ident = "Lenovo ThinkPad X201", | |
519 | .matches = { | |
520 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
521 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201"), | |
522 | }, | |
523 | }, | |
524 | { | |
525 | .callback = init_set_sci_en_on_resume, | |
526 | .ident = "Lenovo ThinkPad X201", | |
527 | .matches = { | |
528 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
529 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"), | |
530 | }, | |
531 | }, | |
532 | { | |
533 | .callback = init_set_sci_en_on_resume, | |
534 | .ident = "Lenovo ThinkPad T410", | |
535 | .matches = { | |
536 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
537 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T410"), | |
538 | }, | |
539 | }, | |
540 | { | |
541 | .callback = init_set_sci_en_on_resume, | |
542 | .ident = "Lenovo ThinkPad T510", | |
543 | .matches = { | |
544 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
545 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T510"), | |
546 | }, | |
547 | }, | |
548 | { | |
549 | .callback = init_set_sci_en_on_resume, | |
550 | .ident = "Lenovo ThinkPad W510", | |
551 | .matches = { | |
552 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
553 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W510"), | |
554 | }, | |
555 | }, | |
556 | { | |
557 | .callback = init_set_sci_en_on_resume, | |
558 | .ident = "Lenovo ThinkPad X201", | |
559 | .matches = { | |
560 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
561 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201"), | |
562 | }, | |
563 | }, | |
564 | { | |
565 | .callback = init_set_sci_en_on_resume, | |
566 | .ident = "Lenovo ThinkPad X201", | |
567 | .matches = { | |
568 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
569 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"), | |
570 | }, | |
571 | }, | |
572 | { | |
2a9ef8e1 ZY |
573 | .callback = init_old_suspend_ordering, |
574 | .ident = "Panasonic CF51-2L", | |
575 | .matches = { | |
576 | DMI_MATCH(DMI_BOARD_VENDOR, | |
577 | "Matsushita Electric Industrial Co.,Ltd."), | |
578 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
579 | }, | |
580 | }, | |
ea5bc73f KM |
581 | { |
582 | .callback = init_set_sci_en_on_resume, | |
583 | .ident = "Dell Studio 1558", | |
584 | .matches = { | |
585 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
586 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1558"), | |
587 | }, | |
588 | }, | |
589 | { | |
590 | .callback = init_set_sci_en_on_resume, | |
591 | .ident = "Dell Studio 1557", | |
592 | .matches = { | |
593 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
594 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"), | |
595 | }, | |
596 | }, | |
597 | { | |
598 | .callback = init_set_sci_en_on_resume, | |
599 | .ident = "Dell Studio 1555", | |
600 | .matches = { | |
601 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
602 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1555"), | |
603 | }, | |
604 | }, | |
e41fb7c5 CC |
605 | {}, |
606 | }; | |
296699de RW |
607 | #endif /* CONFIG_SUSPEND */ |
608 | ||
b0cb1a19 | 609 | #ifdef CONFIG_HIBERNATION |
5d8b532a RW |
610 | /* |
611 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
612 | * and to restore them during the subsequent resume. However, it is not certain | |
613 | * if this mechanism is going to work on all machines, so we allow the user to | |
614 | * disable this mechanism using the 'acpi_sleep=s4_nonvs' kernel command line | |
615 | * option. | |
616 | */ | |
617 | static bool s4_no_nvs; | |
618 | ||
619 | void __init acpi_s4_no_nvs(void) | |
620 | { | |
621 | s4_no_nvs = true; | |
622 | } | |
623 | ||
bdfe6b7c SL |
624 | static unsigned long s4_hardware_signature; |
625 | static struct acpi_table_facs *facs; | |
626 | static bool nosigcheck; | |
627 | ||
628 | void __init acpi_no_s4_hw_signature(void) | |
629 | { | |
630 | nosigcheck = true; | |
631 | } | |
632 | ||
caea99ef | 633 | static int acpi_hibernation_begin(void) |
74f270af | 634 | { |
3f4b0ef7 RW |
635 | int error; |
636 | ||
ba84ed95 | 637 | error = s4_no_nvs ? 0 : hibernate_nvs_alloc(); |
3f4b0ef7 RW |
638 | if (!error) { |
639 | acpi_target_sleep_state = ACPI_STATE_S4; | |
640 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
641 | } | |
642 | ||
643 | return error; | |
644 | } | |
645 | ||
646 | static int acpi_hibernation_pre_snapshot(void) | |
647 | { | |
648 | int error = acpi_pm_prepare(); | |
649 | ||
650 | if (!error) | |
651 | hibernate_nvs_save(); | |
652 | ||
653 | return error; | |
74f270af RW |
654 | } |
655 | ||
a3d25c27 RW |
656 | static int acpi_hibernation_enter(void) |
657 | { | |
658 | acpi_status status = AE_OK; | |
659 | unsigned long flags = 0; | |
660 | ||
661 | ACPI_FLUSH_CPU_CACHE(); | |
662 | ||
663 | local_irq_save(flags); | |
664 | acpi_enable_wakeup_device(ACPI_STATE_S4); | |
665 | /* This shouldn't return. If it returns, we have a problem */ | |
666 | status = acpi_enter_sleep_state(ACPI_STATE_S4); | |
c95d47a8 RW |
667 | /* Reprogram control registers and execute _BFS */ |
668 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
669 | local_irq_restore(flags); |
670 | ||
671 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
672 | } | |
673 | ||
3f4b0ef7 RW |
674 | static void acpi_hibernation_finish(void) |
675 | { | |
676 | hibernate_nvs_free(); | |
677 | acpi_pm_finish(); | |
678 | } | |
679 | ||
c7e0831d RW |
680 | static void acpi_hibernation_leave(void) |
681 | { | |
682 | /* | |
683 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
684 | * enable it here. | |
685 | */ | |
686 | acpi_enable(); | |
c95d47a8 RW |
687 | /* Reprogram control registers and execute _BFS */ |
688 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c SL |
689 | /* Check the hardware signature */ |
690 | if (facs && s4_hardware_signature != facs->hardware_signature) { | |
691 | printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " | |
692 | "cannot resume!\n"); | |
693 | panic("ACPI S4 hardware signature mismatch"); | |
694 | } | |
3f4b0ef7 RW |
695 | /* Restore the NVS memory area */ |
696 | hibernate_nvs_restore(); | |
c7e0831d RW |
697 | } |
698 | ||
f6bb13aa | 699 | static int acpi_pm_pre_restore(void) |
a3d25c27 | 700 | { |
f6bb13aa RW |
701 | acpi_disable_all_gpes(); |
702 | acpi_os_wait_events_complete(NULL); | |
703 | acpi_ec_suspend_transactions(); | |
704 | return 0; | |
705 | } | |
706 | ||
707 | static void acpi_pm_restore_cleanup(void) | |
708 | { | |
709 | acpi_ec_resume_transactions(); | |
3d97e426 | 710 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
711 | } |
712 | ||
d8f3de0d RW |
713 | static struct platform_hibernation_ops acpi_hibernation_ops = { |
714 | .begin = acpi_hibernation_begin, | |
715 | .end = acpi_pm_end, | |
3f4b0ef7 RW |
716 | .pre_snapshot = acpi_hibernation_pre_snapshot, |
717 | .finish = acpi_hibernation_finish, | |
d8f3de0d RW |
718 | .prepare = acpi_pm_prepare, |
719 | .enter = acpi_hibernation_enter, | |
720 | .leave = acpi_hibernation_leave, | |
f6bb13aa RW |
721 | .pre_restore = acpi_pm_pre_restore, |
722 | .restore_cleanup = acpi_pm_restore_cleanup, | |
d8f3de0d | 723 | }; |
caea99ef | 724 | |
d8f3de0d RW |
725 | /** |
726 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
727 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
728 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
729 | * requested. | |
730 | */ | |
731 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 732 | { |
e49f711c ZY |
733 | int error; |
734 | /* | |
735 | * The _TTS object should always be evaluated before the _PTS object. | |
736 | * When the old_suspended_ordering is true, the _PTS object is | |
737 | * evaluated in the acpi_sleep_prepare. | |
738 | */ | |
739 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
740 | ||
741 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 742 | |
3f4b0ef7 | 743 | if (!error) { |
ba84ed95 RW |
744 | if (!s4_no_nvs) |
745 | error = hibernate_nvs_alloc(); | |
3f4b0ef7 RW |
746 | if (!error) |
747 | acpi_target_sleep_state = ACPI_STATE_S4; | |
748 | } | |
749 | return error; | |
750 | } | |
751 | ||
752 | static int acpi_hibernation_pre_snapshot_old(void) | |
753 | { | |
754 | int error = acpi_pm_disable_gpes(); | |
755 | ||
d8f3de0d | 756 | if (!error) |
3f4b0ef7 RW |
757 | hibernate_nvs_save(); |
758 | ||
d8f3de0d | 759 | return error; |
a634cc10 RW |
760 | } |
761 | ||
d8f3de0d RW |
762 | /* |
763 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
764 | * been requested. | |
765 | */ | |
766 | static struct platform_hibernation_ops acpi_hibernation_ops_old = { | |
767 | .begin = acpi_hibernation_begin_old, | |
768 | .end = acpi_pm_end, | |
3f4b0ef7 RW |
769 | .pre_snapshot = acpi_hibernation_pre_snapshot_old, |
770 | .finish = acpi_hibernation_finish, | |
d8f3de0d | 771 | .prepare = acpi_pm_disable_gpes, |
a3d25c27 | 772 | .enter = acpi_hibernation_enter, |
c7e0831d | 773 | .leave = acpi_hibernation_leave, |
f6bb13aa RW |
774 | .pre_restore = acpi_pm_pre_restore, |
775 | .restore_cleanup = acpi_pm_restore_cleanup, | |
d8f3de0d | 776 | .recover = acpi_pm_finish, |
a3d25c27 | 777 | }; |
d8f3de0d | 778 | #endif /* CONFIG_HIBERNATION */ |
a3d25c27 | 779 | |
296699de RW |
780 | int acpi_suspend(u32 acpi_state) |
781 | { | |
782 | suspend_state_t states[] = { | |
783 | [1] = PM_SUSPEND_STANDBY, | |
784 | [3] = PM_SUSPEND_MEM, | |
785 | [5] = PM_SUSPEND_MAX | |
786 | }; | |
787 | ||
788 | if (acpi_state < 6 && states[acpi_state]) | |
789 | return pm_suspend(states[acpi_state]); | |
790 | if (acpi_state == 4) | |
791 | return hibernate(); | |
792 | return -EINVAL; | |
793 | } | |
794 | ||
853298bc | 795 | #ifdef CONFIG_PM_SLEEP |
fd4aff1a SL |
796 | /** |
797 | * acpi_pm_device_sleep_state - return preferred power state of ACPI device | |
798 | * in the system sleep state given by %acpi_target_sleep_state | |
2fe2de5f DB |
799 | * @dev: device to examine; its driver model wakeup flags control |
800 | * whether it should be able to wake up the system | |
fd4aff1a SL |
801 | * @d_min_p: used to store the upper limit of allowed states range |
802 | * Return value: preferred power state of the device on success, -ENODEV on | |
803 | * failure (ie. if there's no 'struct acpi_device' for @dev) | |
804 | * | |
805 | * Find the lowest power (highest number) ACPI device power state that | |
806 | * device @dev can be in while the system is in the sleep state represented | |
807 | * by %acpi_target_sleep_state. If @wake is nonzero, the device should be | |
808 | * able to wake up the system from this sleep state. If @d_min_p is set, | |
809 | * the highest power (lowest number) device power state of @dev allowed | |
810 | * in this system sleep state is stored at the location pointed to by it. | |
811 | * | |
812 | * The caller must ensure that @dev is valid before using this function. | |
813 | * The caller is also responsible for figuring out if the device is | |
814 | * supposed to be able to wake up the system and passing this information | |
815 | * via @wake. | |
816 | */ | |
817 | ||
2fe2de5f | 818 | int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p) |
fd4aff1a SL |
819 | { |
820 | acpi_handle handle = DEVICE_ACPI_HANDLE(dev); | |
821 | struct acpi_device *adev; | |
822 | char acpi_method[] = "_SxD"; | |
27663c58 | 823 | unsigned long long d_min, d_max; |
fd4aff1a SL |
824 | |
825 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
ead77594 | 826 | printk(KERN_DEBUG "ACPI handle has no context!\n"); |
fd4aff1a SL |
827 | return -ENODEV; |
828 | } | |
829 | ||
830 | acpi_method[2] = '0' + acpi_target_sleep_state; | |
831 | /* | |
832 | * If the sleep state is S0, we will return D3, but if the device has | |
833 | * _S0W, we will use the value from _S0W | |
834 | */ | |
835 | d_min = ACPI_STATE_D0; | |
836 | d_max = ACPI_STATE_D3; | |
837 | ||
838 | /* | |
839 | * If present, _SxD methods return the minimum D-state (highest power | |
840 | * state) we can use for the corresponding S-states. Otherwise, the | |
841 | * minimum D-state is D0 (ACPI 3.x). | |
842 | * | |
843 | * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer | |
844 | * provided -- that's our fault recovery, we ignore retval. | |
845 | */ | |
846 | if (acpi_target_sleep_state > ACPI_STATE_S0) | |
847 | acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); | |
848 | ||
849 | /* | |
850 | * If _PRW says we can wake up the system from the target sleep state, | |
851 | * the D-state returned by _SxD is sufficient for that (we assume a | |
852 | * wakeup-aware driver if wake is set). Still, if _SxW exists | |
853 | * (ACPI 3.x), it should return the maximum (lowest power) D-state that | |
854 | * can wake the system. _S0W may be valid, too. | |
855 | */ | |
856 | if (acpi_target_sleep_state == ACPI_STATE_S0 || | |
2fe2de5f | 857 | (device_may_wakeup(dev) && adev->wakeup.state.enabled && |
fd4aff1a | 858 | adev->wakeup.sleep_state <= acpi_target_sleep_state)) { |
ad3399c3 RW |
859 | acpi_status status; |
860 | ||
fd4aff1a | 861 | acpi_method[3] = 'W'; |
ad3399c3 RW |
862 | status = acpi_evaluate_integer(handle, acpi_method, NULL, |
863 | &d_max); | |
864 | if (ACPI_FAILURE(status)) { | |
865 | d_max = d_min; | |
866 | } else if (d_max < d_min) { | |
867 | /* Warn the user of the broken DSDT */ | |
868 | printk(KERN_WARNING "ACPI: Wrong value from %s\n", | |
869 | acpi_method); | |
870 | /* Sanitize it */ | |
fd4aff1a | 871 | d_min = d_max; |
ad3399c3 | 872 | } |
fd4aff1a SL |
873 | } |
874 | ||
875 | if (d_min_p) | |
876 | *d_min_p = d_min; | |
877 | return d_max; | |
878 | } | |
eb9d0fe4 RW |
879 | |
880 | /** | |
881 | * acpi_pm_device_sleep_wake - enable or disable the system wake-up | |
882 | * capability of given device | |
883 | * @dev: device to handle | |
884 | * @enable: 'true' - enable, 'false' - disable the wake-up capability | |
885 | */ | |
886 | int acpi_pm_device_sleep_wake(struct device *dev, bool enable) | |
887 | { | |
888 | acpi_handle handle; | |
889 | struct acpi_device *adev; | |
df8db91f | 890 | int error; |
eb9d0fe4 | 891 | |
0baed8da | 892 | if (!device_can_wakeup(dev)) |
eb9d0fe4 RW |
893 | return -EINVAL; |
894 | ||
895 | handle = DEVICE_ACPI_HANDLE(dev); | |
896 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
df8db91f | 897 | dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__); |
eb9d0fe4 RW |
898 | return -ENODEV; |
899 | } | |
900 | ||
9630bdd9 RW |
901 | if (enable) { |
902 | error = acpi_enable_wakeup_device_power(adev, | |
903 | acpi_target_sleep_state); | |
904 | if (!error) | |
905 | acpi_enable_gpe(adev->wakeup.gpe_device, | |
906 | adev->wakeup.gpe_number, | |
907 | ACPI_GPE_TYPE_WAKE); | |
908 | } else { | |
909 | acpi_disable_gpe(adev->wakeup.gpe_device, adev->wakeup.gpe_number, | |
910 | ACPI_GPE_TYPE_WAKE); | |
911 | error = acpi_disable_wakeup_device_power(adev); | |
912 | } | |
df8db91f RW |
913 | if (!error) |
914 | dev_info(dev, "wake-up capability %s by ACPI\n", | |
915 | enable ? "enabled" : "disabled"); | |
916 | ||
917 | return error; | |
eb9d0fe4 | 918 | } |
853298bc | 919 | #endif |
fd4aff1a | 920 | |
f216cc37 AS |
921 | static void acpi_power_off_prepare(void) |
922 | { | |
923 | /* Prepare to power off the system */ | |
924 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 925 | acpi_disable_all_gpes(); |
f216cc37 AS |
926 | } |
927 | ||
928 | static void acpi_power_off(void) | |
929 | { | |
930 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 931 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 932 | local_irq_disable(); |
9c1c6a1b | 933 | acpi_enable_wakeup_device(ACPI_STATE_S5); |
f216cc37 AS |
934 | acpi_enter_sleep_state(ACPI_STATE_S5); |
935 | } | |
936 | ||
96f15efc LB |
937 | /* |
938 | * ACPI 2.0 created the optional _GTS and _BFS, | |
939 | * but industry adoption has been neither rapid nor broad. | |
940 | * | |
941 | * Linux gets into trouble when it executes poorly validated | |
942 | * paths through the BIOS, so disable _GTS and _BFS by default, | |
943 | * but do speak up and offer the option to enable them. | |
944 | */ | |
945 | void __init acpi_gts_bfs_check(void) | |
946 | { | |
947 | acpi_handle dummy; | |
948 | ||
949 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__GTS, &dummy))) | |
950 | { | |
951 | printk(KERN_NOTICE PREFIX "BIOS offers _GTS\n"); | |
952 | printk(KERN_NOTICE PREFIX "If \"acpi.gts=1\" improves suspend, " | |
953 | "please notify linux-acpi@vger.kernel.org\n"); | |
954 | } | |
955 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__BFS, &dummy))) | |
956 | { | |
957 | printk(KERN_NOTICE PREFIX "BIOS offers _BFS\n"); | |
958 | printk(KERN_NOTICE PREFIX "If \"acpi.bfs=1\" improves resume, " | |
959 | "please notify linux-acpi@vger.kernel.org\n"); | |
960 | } | |
961 | } | |
962 | ||
aafbcd16 | 963 | int __init acpi_sleep_init(void) |
1da177e4 | 964 | { |
296699de RW |
965 | acpi_status status; |
966 | u8 type_a, type_b; | |
967 | #ifdef CONFIG_SUSPEND | |
e2a5b420 | 968 | int i = 0; |
e41fb7c5 CC |
969 | |
970 | dmi_check_system(acpisleep_dmi_table); | |
296699de | 971 | #endif |
1da177e4 LT |
972 | |
973 | if (acpi_disabled) | |
974 | return 0; | |
975 | ||
5a50fe70 FP |
976 | sleep_states[ACPI_STATE_S0] = 1; |
977 | printk(KERN_INFO PREFIX "(supports S0"); | |
978 | ||
296699de | 979 | #ifdef CONFIG_SUSPEND |
5a50fe70 | 980 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { |
1da177e4 LT |
981 | status = acpi_get_sleep_type_data(i, &type_a, &type_b); |
982 | if (ACPI_SUCCESS(status)) { | |
983 | sleep_states[i] = 1; | |
984 | printk(" S%d", i); | |
985 | } | |
1da177e4 | 986 | } |
1da177e4 | 987 | |
d8f3de0d RW |
988 | suspend_set_ops(old_suspend_ordering ? |
989 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
296699de | 990 | #endif |
a3d25c27 | 991 | |
b0cb1a19 | 992 | #ifdef CONFIG_HIBERNATION |
296699de RW |
993 | status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); |
994 | if (ACPI_SUCCESS(status)) { | |
d8f3de0d RW |
995 | hibernation_set_ops(old_suspend_ordering ? |
996 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
296699de | 997 | sleep_states[ACPI_STATE_S4] = 1; |
f216cc37 | 998 | printk(" S4"); |
bdfe6b7c | 999 | if (!nosigcheck) { |
3d97e426 | 1000 | acpi_get_table(ACPI_SIG_FACS, 1, |
bdfe6b7c SL |
1001 | (struct acpi_table_header **)&facs); |
1002 | if (facs) | |
1003 | s4_hardware_signature = | |
1004 | facs->hardware_signature; | |
1005 | } | |
296699de | 1006 | } |
a3d25c27 | 1007 | #endif |
f216cc37 AS |
1008 | status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
1009 | if (ACPI_SUCCESS(status)) { | |
1010 | sleep_states[ACPI_STATE_S5] = 1; | |
1011 | printk(" S5"); | |
1012 | pm_power_off_prepare = acpi_power_off_prepare; | |
1013 | pm_power_off = acpi_power_off; | |
1014 | } | |
1015 | printk(")\n"); | |
e49f711c ZY |
1016 | /* |
1017 | * Register the tts_notifier to reboot notifier list so that the _TTS | |
1018 | * object can also be evaluated when the system enters S5. | |
1019 | */ | |
1020 | register_reboot_notifier(&tts_notifier); | |
96f15efc | 1021 | acpi_gts_bfs_check(); |
1da177e4 LT |
1022 | return 0; |
1023 | } |