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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> | |
e49f711c | 18 | #include <linux/reboot.h> |
d1ee4335 | 19 | #include <linux/acpi.h> |
a2ef5c4f | 20 | #include <linux/module.h> |
b24e5098 | 21 | #include <linux/pm_runtime.h> |
f216cc37 AS |
22 | |
23 | #include <asm/io.h> | |
24 | ||
1da177e4 LT |
25 | #include <acpi/acpi_bus.h> |
26 | #include <acpi/acpi_drivers.h> | |
e60cc7a6 BH |
27 | |
28 | #include "internal.h" | |
1da177e4 LT |
29 | #include "sleep.h" |
30 | ||
2a14e541 | 31 | u8 wake_sleep_flags = ACPI_NO_OPTIONAL_METHODS; |
a2ef5c4f | 32 | static unsigned int gts, bfs; |
2a14e541 | 33 | static int set_param_wake_flag(const char *val, struct kernel_param *kp) |
a2ef5c4f | 34 | { |
2a14e541 | 35 | int ret = param_set_int(val, kp); |
a2ef5c4f | 36 | |
2a14e541 KRW |
37 | if (ret) |
38 | return ret; | |
a2ef5c4f | 39 | |
2a14e541 KRW |
40 | if (kp->arg == (const char *)>s) { |
41 | if (gts) | |
42 | wake_sleep_flags |= ACPI_EXECUTE_GTS; | |
43 | else | |
44 | wake_sleep_flags &= ~ACPI_EXECUTE_GTS; | |
45 | } | |
46 | if (kp->arg == (const char *)&bfs) { | |
47 | if (bfs) | |
48 | wake_sleep_flags |= ACPI_EXECUTE_BFS; | |
49 | else | |
50 | wake_sleep_flags &= ~ACPI_EXECUTE_BFS; | |
51 | } | |
52 | return ret; | |
a2ef5c4f | 53 | } |
2a14e541 KRW |
54 | module_param_call(gts, set_param_wake_flag, param_get_int, >s, 0644); |
55 | module_param_call(bfs, set_param_wake_flag, param_get_int, &bfs, 0644); | |
56 | MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend."); | |
57 | MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".); | |
a2ef5c4f | 58 | |
01eac60b | 59 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
c10d7a13 | 60 | static bool pwr_btn_event_pending; |
1da177e4 | 61 | |
e49f711c ZY |
62 | static void acpi_sleep_tts_switch(u32 acpi_state) |
63 | { | |
64 | union acpi_object in_arg = { ACPI_TYPE_INTEGER }; | |
65 | struct acpi_object_list arg_list = { 1, &in_arg }; | |
66 | acpi_status status = AE_OK; | |
67 | ||
68 | in_arg.integer.value = acpi_state; | |
69 | status = acpi_evaluate_object(NULL, "\\_TTS", &arg_list, NULL); | |
70 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
71 | /* | |
72 | * OS can't evaluate the _TTS object correctly. Some warning | |
73 | * message will be printed. But it won't break anything. | |
74 | */ | |
75 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); | |
76 | } | |
77 | } | |
78 | ||
79 | static int tts_notify_reboot(struct notifier_block *this, | |
80 | unsigned long code, void *x) | |
81 | { | |
82 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
83 | return NOTIFY_DONE; | |
84 | } | |
85 | ||
86 | static struct notifier_block tts_notifier = { | |
87 | .notifier_call = tts_notify_reboot, | |
88 | .next = NULL, | |
89 | .priority = 0, | |
90 | }; | |
91 | ||
c9b6c8f6 | 92 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
93 | { |
94 | #ifdef CONFIG_ACPI_SLEEP | |
95 | /* do we have a wakeup address for S2 and S3? */ | |
96 | if (acpi_state == ACPI_STATE_S3) { | |
97 | if (!acpi_wakeup_address) { | |
98 | return -EFAULT; | |
99 | } | |
4b4f7280 PA |
100 | acpi_set_firmware_waking_vector( |
101 | (acpi_physical_address)acpi_wakeup_address); | |
2f3f2226 AS |
102 | |
103 | } | |
104 | ACPI_FLUSH_CPU_CACHE(); | |
2f3f2226 | 105 | #endif |
c9b6c8f6 RW |
106 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
107 | acpi_state); | |
78f5f023 | 108 | acpi_enable_wakeup_devices(acpi_state); |
2f3f2226 AS |
109 | acpi_enter_sleep_state_prep(acpi_state); |
110 | return 0; | |
111 | } | |
112 | ||
5d1e072b | 113 | #ifdef CONFIG_ACPI_SLEEP |
091aad6a JB |
114 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
115 | ||
72ad5d77 RW |
116 | /* |
117 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
118 | * and to restore them during the subsequent resume. Windows does that also for | |
119 | * suspend to RAM. However, it is known that this mechanism does not work on | |
120 | * all machines, so we allow the user to disable it with the help of the | |
121 | * 'acpi_sleep=nonvs' kernel command line option. | |
122 | */ | |
123 | static bool nvs_nosave; | |
124 | ||
125 | void __init acpi_nvs_nosave(void) | |
126 | { | |
127 | nvs_nosave = true; | |
128 | } | |
129 | ||
d8f3de0d RW |
130 | /* |
131 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
132 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
133 | * kernel command line option that causes the following variable to be set. | |
134 | */ | |
135 | static bool old_suspend_ordering; | |
136 | ||
137 | void __init acpi_old_suspend_ordering(void) | |
138 | { | |
139 | old_suspend_ordering = true; | |
140 | } | |
141 | ||
142 | /** | |
d5a64513 | 143 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 144 | */ |
d5a64513 | 145 | static int acpi_pm_freeze(void) |
d8f3de0d | 146 | { |
3d97e426 | 147 | acpi_disable_all_gpes(); |
d5a64513 | 148 | acpi_os_wait_events_complete(NULL); |
fe955682 | 149 | acpi_ec_block_transactions(); |
d8f3de0d RW |
150 | return 0; |
151 | } | |
152 | ||
c5f7a1bb RW |
153 | /** |
154 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
155 | */ | |
156 | static int acpi_pm_pre_suspend(void) | |
157 | { | |
158 | acpi_pm_freeze(); | |
26fcaf60 | 159 | return suspend_nvs_save(); |
c5f7a1bb RW |
160 | } |
161 | ||
d8f3de0d RW |
162 | /** |
163 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
164 | * | |
165 | * If necessary, set the firmware waking vector and do arch-specific | |
166 | * nastiness to get the wakeup code to the waking vector. | |
167 | */ | |
168 | static int __acpi_pm_prepare(void) | |
169 | { | |
170 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
171 | if (error) |
172 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 173 | |
d8f3de0d RW |
174 | return error; |
175 | } | |
176 | ||
177 | /** | |
178 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
179 | * state and disable the GPEs. | |
180 | */ | |
181 | static int acpi_pm_prepare(void) | |
182 | { | |
183 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 184 | if (!error) |
26fcaf60 | 185 | error = acpi_pm_pre_suspend(); |
d5a64513 | 186 | |
d8f3de0d RW |
187 | return error; |
188 | } | |
189 | ||
c10d7a13 DD |
190 | static int find_powerf_dev(struct device *dev, void *data) |
191 | { | |
192 | struct acpi_device *device = to_acpi_device(dev); | |
193 | const char *hid = acpi_device_hid(device); | |
194 | ||
195 | return !strcmp(hid, ACPI_BUTTON_HID_POWERF); | |
196 | } | |
197 | ||
d8f3de0d RW |
198 | /** |
199 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
200 | * | |
201 | * This is called after we wake back up (or if entering the sleep state | |
202 | * failed). | |
203 | */ | |
204 | static void acpi_pm_finish(void) | |
205 | { | |
c10d7a13 | 206 | struct device *pwr_btn_dev; |
d8f3de0d RW |
207 | u32 acpi_state = acpi_target_sleep_state; |
208 | ||
42de5532 | 209 | acpi_ec_unblock_transactions(); |
d551d81d | 210 | suspend_nvs_free(); |
2a6b6976 | 211 | |
d8f3de0d RW |
212 | if (acpi_state == ACPI_STATE_S0) |
213 | return; | |
1da177e4 | 214 | |
d8f3de0d RW |
215 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
216 | acpi_state); | |
78f5f023 | 217 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
218 | acpi_leave_sleep_state(acpi_state); |
219 | ||
220 | /* reset firmware waking vector */ | |
221 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
222 | ||
223 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c10d7a13 DD |
224 | |
225 | /* If we were woken with the fixed power button, provide a small | |
226 | * hint to userspace in the form of a wakeup event on the fixed power | |
227 | * button device (if it can be found). | |
228 | * | |
229 | * We delay the event generation til now, as the PM layer requires | |
230 | * timekeeping to be running before we generate events. */ | |
231 | if (!pwr_btn_event_pending) | |
232 | return; | |
233 | ||
234 | pwr_btn_event_pending = false; | |
235 | pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, | |
236 | find_powerf_dev); | |
237 | if (pwr_btn_dev) { | |
238 | pm_wakeup_event(pwr_btn_dev, 0); | |
239 | put_device(pwr_btn_dev); | |
240 | } | |
d8f3de0d RW |
241 | } |
242 | ||
243 | /** | |
244 | * acpi_pm_end - Finish up suspend sequence. | |
245 | */ | |
246 | static void acpi_pm_end(void) | |
247 | { | |
248 | /* | |
249 | * This is necessary in case acpi_pm_finish() is not called during a | |
250 | * failing transition to a sleep state. | |
251 | */ | |
252 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 253 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 254 | } |
92daa7b5 RW |
255 | #else /* !CONFIG_ACPI_SLEEP */ |
256 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
5d1e072b | 257 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 258 | |
d8f3de0d | 259 | #ifdef CONFIG_SUSPEND |
1da177e4 | 260 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
261 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
262 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
263 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 264 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
265 | }; |
266 | ||
e9b3aba8 | 267 | /** |
2c6e33c3 | 268 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
269 | * associated with given @pm_state, if supported. |
270 | */ | |
2c6e33c3 | 271 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
272 | { |
273 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
274 | int error = 0; | |
275 | ||
72ad5d77 | 276 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
277 | if (error) |
278 | return error; | |
279 | ||
e9b3aba8 RW |
280 | if (sleep_states[acpi_state]) { |
281 | acpi_target_sleep_state = acpi_state; | |
e49f711c | 282 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
e9b3aba8 RW |
283 | } else { |
284 | printk(KERN_ERR "ACPI does not support this state: %d\n", | |
285 | pm_state); | |
286 | error = -ENOSYS; | |
287 | } | |
288 | return error; | |
289 | } | |
290 | ||
1da177e4 | 291 | /** |
2c6e33c3 | 292 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 293 | * @pm_state: ignored |
1da177e4 | 294 | * |
50ad147a RW |
295 | * Flush caches and go to sleep. For STR we have to call arch-specific |
296 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
297 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
298 | */ | |
2c6e33c3 | 299 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
300 | { |
301 | acpi_status status = AE_OK; | |
e9b3aba8 | 302 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 303 | int error; |
1da177e4 LT |
304 | |
305 | ACPI_FLUSH_CPU_CACHE(); | |
306 | ||
e9b3aba8 RW |
307 | switch (acpi_state) { |
308 | case ACPI_STATE_S1: | |
1da177e4 | 309 | barrier(); |
2a14e541 | 310 | status = acpi_enter_sleep_state(acpi_state, wake_sleep_flags); |
1da177e4 LT |
311 | break; |
312 | ||
e9b3aba8 | 313 | case ACPI_STATE_S3: |
f1a2003e | 314 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
315 | if (error) |
316 | return error; | |
7a63f08b | 317 | pr_info(PREFIX "Low-level resume complete\n"); |
1da177e4 | 318 | break; |
1da177e4 | 319 | } |
872d83d0 | 320 | |
b6dacf63 MG |
321 | /* This violates the spec but is required for bug compatibility. */ |
322 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 323 | |
c95d47a8 | 324 | /* Reprogram control registers and execute _BFS */ |
2a14e541 | 325 | acpi_leave_sleep_state_prep(acpi_state, wake_sleep_flags); |
c95d47a8 | 326 | |
23b168d4 | 327 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
328 | * of the OSPM to clear the status bit [ implying that the |
329 | * POWER_BUTTON event should not reach userspace ] | |
c10d7a13 DD |
330 | * |
331 | * However, we do generate a small hint for userspace in the form of | |
332 | * a wakeup event. We flag this condition for now and generate the | |
333 | * event later, as we're currently too early in resume to be able to | |
334 | * generate wakeup events. | |
872d83d0 | 335 | */ |
c10d7a13 DD |
336 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
337 | acpi_event_status pwr_btn_status; | |
338 | ||
339 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); | |
340 | ||
341 | if (pwr_btn_status & ACPI_EVENT_FLAG_SET) { | |
342 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
343 | /* Flag for later */ | |
344 | pwr_btn_event_pending = true; | |
345 | } | |
346 | } | |
872d83d0 | 347 | |
a3627f67 SL |
348 | /* |
349 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
350 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
351 | * acpi_leave_sleep_state will reenable specific GPEs later | |
352 | */ | |
3d97e426 | 353 | acpi_disable_all_gpes(); |
d5a64513 | 354 | /* Allow EC transactions to happen. */ |
fe955682 | 355 | acpi_ec_unblock_transactions_early(); |
a3627f67 | 356 | |
2a6b6976 MG |
357 | suspend_nvs_restore(); |
358 | ||
1da177e4 LT |
359 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
360 | } | |
361 | ||
2c6e33c3 | 362 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 363 | { |
e8c9c502 | 364 | u32 acpi_state; |
eb9289eb | 365 | |
e8c9c502 JB |
366 | switch (pm_state) { |
367 | case PM_SUSPEND_ON: | |
368 | case PM_SUSPEND_STANDBY: | |
369 | case PM_SUSPEND_MEM: | |
370 | acpi_state = acpi_suspend_states[pm_state]; | |
371 | ||
372 | return sleep_states[acpi_state]; | |
373 | default: | |
374 | return 0; | |
375 | } | |
eb9289eb SL |
376 | } |
377 | ||
2f55ac07 | 378 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
379 | .valid = acpi_suspend_state_valid, |
380 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 381 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 382 | .enter = acpi_suspend_enter, |
618d7fd0 | 383 | .wake = acpi_pm_finish, |
d8f3de0d RW |
384 | .end = acpi_pm_end, |
385 | }; | |
386 | ||
387 | /** | |
388 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
389 | * state associated with given @pm_state, if supported, and | |
390 | * execute the _PTS control method. This function is used if the | |
391 | * pre-ACPI 2.0 suspend ordering has been requested. | |
392 | */ | |
393 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
394 | { | |
395 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
396 | if (!error) |
397 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 398 | |
d8f3de0d RW |
399 | return error; |
400 | } | |
401 | ||
402 | /* | |
403 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
404 | * been requested. | |
405 | */ | |
2f55ac07 | 406 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
407 | .valid = acpi_suspend_state_valid, |
408 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 409 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 410 | .enter = acpi_suspend_enter, |
618d7fd0 | 411 | .wake = acpi_pm_finish, |
d8f3de0d RW |
412 | .end = acpi_pm_end, |
413 | .recover = acpi_pm_finish, | |
1da177e4 | 414 | }; |
e41fb7c5 CC |
415 | |
416 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) | |
417 | { | |
418 | old_suspend_ordering = true; | |
419 | return 0; | |
420 | } | |
421 | ||
53998648 RW |
422 | static int __init init_nvs_nosave(const struct dmi_system_id *d) |
423 | { | |
424 | acpi_nvs_nosave(); | |
425 | return 0; | |
426 | } | |
427 | ||
e41fb7c5 CC |
428 | static struct dmi_system_id __initdata acpisleep_dmi_table[] = { |
429 | { | |
430 | .callback = init_old_suspend_ordering, | |
431 | .ident = "Abit KN9 (nForce4 variant)", | |
432 | .matches = { | |
433 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
434 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
435 | }, | |
436 | }, | |
4fb507b6 RW |
437 | { |
438 | .callback = init_old_suspend_ordering, | |
439 | .ident = "HP xw4600 Workstation", | |
440 | .matches = { | |
441 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
442 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
443 | }, | |
444 | }, | |
65df7847 | 445 | { |
a1404495 AW |
446 | .callback = init_old_suspend_ordering, |
447 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
448 | .matches = { | |
449 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
450 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
451 | }, | |
452 | }, | |
45e77988 | 453 | { |
2a9ef8e1 ZY |
454 | .callback = init_old_suspend_ordering, |
455 | .ident = "Panasonic CF51-2L", | |
456 | .matches = { | |
457 | DMI_MATCH(DMI_BOARD_VENDOR, | |
458 | "Matsushita Electric Industrial Co.,Ltd."), | |
459 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
460 | }, | |
461 | }, | |
53998648 RW |
462 | { |
463 | .callback = init_nvs_nosave, | |
d11c78e9 DJ |
464 | .ident = "Sony Vaio VGN-FW21E", |
465 | .matches = { | |
466 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
467 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
468 | }, | |
469 | }, | |
470 | { | |
471 | .callback = init_nvs_nosave, | |
ddf6ce45 DJ |
472 | .ident = "Sony Vaio VPCEB17FX", |
473 | .matches = { | |
474 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
475 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
476 | }, | |
477 | }, | |
478 | { | |
479 | .callback = init_nvs_nosave, | |
53998648 RW |
480 | .ident = "Sony Vaio VGN-SR11M", |
481 | .matches = { | |
482 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
483 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
484 | }, | |
485 | }, | |
486 | { | |
487 | .callback = init_nvs_nosave, | |
488 | .ident = "Everex StepNote Series", | |
489 | .matches = { | |
490 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
491 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
492 | }, | |
493 | }, | |
af48931c RW |
494 | { |
495 | .callback = init_nvs_nosave, | |
496 | .ident = "Sony Vaio VPCEB1Z1E", | |
497 | .matches = { | |
498 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
499 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
500 | }, | |
501 | }, | |
291a73c9 RW |
502 | { |
503 | .callback = init_nvs_nosave, | |
504 | .ident = "Sony Vaio VGN-NW130D", | |
505 | .matches = { | |
506 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
507 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
508 | }, | |
509 | }, | |
7b330707 RW |
510 | { |
511 | .callback = init_nvs_nosave, | |
93f77084 LT |
512 | .ident = "Sony Vaio VPCCW29FX", |
513 | .matches = { | |
514 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
515 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
516 | }, | |
517 | }, | |
518 | { | |
519 | .callback = init_nvs_nosave, | |
7b330707 RW |
520 | .ident = "Averatec AV1020-ED2", |
521 | .matches = { | |
522 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
523 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
524 | }, | |
525 | }, | |
bb0c5ed6 ZR |
526 | { |
527 | .callback = init_old_suspend_ordering, | |
528 | .ident = "Asus A8N-SLI DELUXE", | |
529 | .matches = { | |
530 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
531 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
532 | }, | |
533 | }, | |
534 | { | |
535 | .callback = init_old_suspend_ordering, | |
536 | .ident = "Asus A8N-SLI Premium", | |
537 | .matches = { | |
538 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
539 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
540 | }, | |
541 | }, | |
89e8ea12 RW |
542 | { |
543 | .callback = init_nvs_nosave, | |
544 | .ident = "Sony Vaio VGN-SR26GN_P", | |
545 | .matches = { | |
546 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
547 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
548 | }, | |
549 | }, | |
731b25a4 BR |
550 | { |
551 | .callback = init_nvs_nosave, | |
552 | .ident = "Sony Vaio VGN-FW520F", | |
553 | .matches = { | |
554 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
555 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
556 | }, | |
557 | }, | |
5a50a7c3 KYL |
558 | { |
559 | .callback = init_nvs_nosave, | |
560 | .ident = "Asus K54C", | |
561 | .matches = { | |
562 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
563 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
564 | }, | |
565 | }, | |
566 | { | |
567 | .callback = init_nvs_nosave, | |
568 | .ident = "Asus K54HR", | |
569 | .matches = { | |
570 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
571 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
572 | }, | |
573 | }, | |
e41fb7c5 CC |
574 | {}, |
575 | }; | |
296699de RW |
576 | #endif /* CONFIG_SUSPEND */ |
577 | ||
b0cb1a19 | 578 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
579 | static unsigned long s4_hardware_signature; |
580 | static struct acpi_table_facs *facs; | |
581 | static bool nosigcheck; | |
582 | ||
583 | void __init acpi_no_s4_hw_signature(void) | |
584 | { | |
585 | nosigcheck = true; | |
586 | } | |
587 | ||
caea99ef | 588 | static int acpi_hibernation_begin(void) |
74f270af | 589 | { |
3f4b0ef7 RW |
590 | int error; |
591 | ||
72ad5d77 | 592 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
3f4b0ef7 RW |
593 | if (!error) { |
594 | acpi_target_sleep_state = ACPI_STATE_S4; | |
595 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
596 | } | |
597 | ||
598 | return error; | |
599 | } | |
600 | ||
a3d25c27 RW |
601 | static int acpi_hibernation_enter(void) |
602 | { | |
603 | acpi_status status = AE_OK; | |
a3d25c27 RW |
604 | |
605 | ACPI_FLUSH_CPU_CACHE(); | |
606 | ||
a3d25c27 | 607 | /* This shouldn't return. If it returns, we have a problem */ |
2a14e541 | 608 | status = acpi_enter_sleep_state(ACPI_STATE_S4, wake_sleep_flags); |
c95d47a8 | 609 | /* Reprogram control registers and execute _BFS */ |
2a14e541 | 610 | acpi_leave_sleep_state_prep(ACPI_STATE_S4, wake_sleep_flags); |
a3d25c27 RW |
611 | |
612 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
613 | } | |
614 | ||
c7e0831d RW |
615 | static void acpi_hibernation_leave(void) |
616 | { | |
617 | /* | |
618 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
619 | * enable it here. | |
620 | */ | |
621 | acpi_enable(); | |
c95d47a8 | 622 | /* Reprogram control registers and execute _BFS */ |
2a14e541 | 623 | acpi_leave_sleep_state_prep(ACPI_STATE_S4, wake_sleep_flags); |
bdfe6b7c SL |
624 | /* Check the hardware signature */ |
625 | if (facs && s4_hardware_signature != facs->hardware_signature) { | |
626 | printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " | |
627 | "cannot resume!\n"); | |
628 | panic("ACPI S4 hardware signature mismatch"); | |
629 | } | |
3f4b0ef7 | 630 | /* Restore the NVS memory area */ |
dd4c4f17 | 631 | suspend_nvs_restore(); |
d5a64513 | 632 | /* Allow EC transactions to happen. */ |
fe955682 | 633 | acpi_ec_unblock_transactions_early(); |
c7e0831d RW |
634 | } |
635 | ||
d5a64513 | 636 | static void acpi_pm_thaw(void) |
f6bb13aa | 637 | { |
fe955682 | 638 | acpi_ec_unblock_transactions(); |
3d97e426 | 639 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
640 | } |
641 | ||
073ef1f6 | 642 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
643 | .begin = acpi_hibernation_begin, |
644 | .end = acpi_pm_end, | |
c5f7a1bb | 645 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 646 | .finish = acpi_pm_finish, |
d8f3de0d RW |
647 | .prepare = acpi_pm_prepare, |
648 | .enter = acpi_hibernation_enter, | |
649 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
650 | .pre_restore = acpi_pm_freeze, |
651 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 652 | }; |
caea99ef | 653 | |
d8f3de0d RW |
654 | /** |
655 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
656 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
657 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
658 | * requested. | |
659 | */ | |
660 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 661 | { |
e49f711c ZY |
662 | int error; |
663 | /* | |
664 | * The _TTS object should always be evaluated before the _PTS object. | |
665 | * When the old_suspended_ordering is true, the _PTS object is | |
666 | * evaluated in the acpi_sleep_prepare. | |
667 | */ | |
668 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
669 | ||
670 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 671 | |
3f4b0ef7 | 672 | if (!error) { |
72ad5d77 | 673 | if (!nvs_nosave) |
dd4c4f17 | 674 | error = suspend_nvs_alloc(); |
3f4b0ef7 RW |
675 | if (!error) |
676 | acpi_target_sleep_state = ACPI_STATE_S4; | |
677 | } | |
678 | return error; | |
679 | } | |
680 | ||
d8f3de0d RW |
681 | /* |
682 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
683 | * been requested. | |
684 | */ | |
073ef1f6 | 685 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
686 | .begin = acpi_hibernation_begin_old, |
687 | .end = acpi_pm_end, | |
c5f7a1bb | 688 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 689 | .prepare = acpi_pm_freeze, |
2a6b6976 | 690 | .finish = acpi_pm_finish, |
a3d25c27 | 691 | .enter = acpi_hibernation_enter, |
c7e0831d | 692 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
693 | .pre_restore = acpi_pm_freeze, |
694 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 695 | .recover = acpi_pm_finish, |
a3d25c27 | 696 | }; |
d8f3de0d | 697 | #endif /* CONFIG_HIBERNATION */ |
a3d25c27 | 698 | |
296699de RW |
699 | int acpi_suspend(u32 acpi_state) |
700 | { | |
701 | suspend_state_t states[] = { | |
702 | [1] = PM_SUSPEND_STANDBY, | |
703 | [3] = PM_SUSPEND_MEM, | |
704 | [5] = PM_SUSPEND_MAX | |
705 | }; | |
706 | ||
707 | if (acpi_state < 6 && states[acpi_state]) | |
708 | return pm_suspend(states[acpi_state]); | |
709 | if (acpi_state == 4) | |
710 | return hibernate(); | |
711 | return -EINVAL; | |
712 | } | |
713 | ||
aa338601 | 714 | #ifdef CONFIG_PM |
fd4aff1a SL |
715 | /** |
716 | * acpi_pm_device_sleep_state - return preferred power state of ACPI device | |
717 | * in the system sleep state given by %acpi_target_sleep_state | |
2fe2de5f DB |
718 | * @dev: device to examine; its driver model wakeup flags control |
719 | * whether it should be able to wake up the system | |
fd4aff1a SL |
720 | * @d_min_p: used to store the upper limit of allowed states range |
721 | * Return value: preferred power state of the device on success, -ENODEV on | |
722 | * failure (ie. if there's no 'struct acpi_device' for @dev) | |
723 | * | |
724 | * Find the lowest power (highest number) ACPI device power state that | |
725 | * device @dev can be in while the system is in the sleep state represented | |
726 | * by %acpi_target_sleep_state. If @wake is nonzero, the device should be | |
727 | * able to wake up the system from this sleep state. If @d_min_p is set, | |
728 | * the highest power (lowest number) device power state of @dev allowed | |
729 | * in this system sleep state is stored at the location pointed to by it. | |
730 | * | |
731 | * The caller must ensure that @dev is valid before using this function. | |
732 | * The caller is also responsible for figuring out if the device is | |
733 | * supposed to be able to wake up the system and passing this information | |
734 | * via @wake. | |
735 | */ | |
736 | ||
2fe2de5f | 737 | int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p) |
fd4aff1a SL |
738 | { |
739 | acpi_handle handle = DEVICE_ACPI_HANDLE(dev); | |
740 | struct acpi_device *adev; | |
741 | char acpi_method[] = "_SxD"; | |
27663c58 | 742 | unsigned long long d_min, d_max; |
fd4aff1a SL |
743 | |
744 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
ead77594 | 745 | printk(KERN_DEBUG "ACPI handle has no context!\n"); |
fd4aff1a SL |
746 | return -ENODEV; |
747 | } | |
748 | ||
749 | acpi_method[2] = '0' + acpi_target_sleep_state; | |
750 | /* | |
751 | * If the sleep state is S0, we will return D3, but if the device has | |
752 | * _S0W, we will use the value from _S0W | |
753 | */ | |
754 | d_min = ACPI_STATE_D0; | |
755 | d_max = ACPI_STATE_D3; | |
756 | ||
757 | /* | |
758 | * If present, _SxD methods return the minimum D-state (highest power | |
759 | * state) we can use for the corresponding S-states. Otherwise, the | |
760 | * minimum D-state is D0 (ACPI 3.x). | |
761 | * | |
762 | * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer | |
763 | * provided -- that's our fault recovery, we ignore retval. | |
764 | */ | |
765 | if (acpi_target_sleep_state > ACPI_STATE_S0) | |
766 | acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); | |
767 | ||
768 | /* | |
769 | * If _PRW says we can wake up the system from the target sleep state, | |
770 | * the D-state returned by _SxD is sufficient for that (we assume a | |
771 | * wakeup-aware driver if wake is set). Still, if _SxW exists | |
772 | * (ACPI 3.x), it should return the maximum (lowest power) D-state that | |
773 | * can wake the system. _S0W may be valid, too. | |
774 | */ | |
775 | if (acpi_target_sleep_state == ACPI_STATE_S0 || | |
761afb86 | 776 | (device_may_wakeup(dev) && |
fd4aff1a | 777 | adev->wakeup.sleep_state <= acpi_target_sleep_state)) { |
ad3399c3 RW |
778 | acpi_status status; |
779 | ||
fd4aff1a | 780 | acpi_method[3] = 'W'; |
ad3399c3 RW |
781 | status = acpi_evaluate_integer(handle, acpi_method, NULL, |
782 | &d_max); | |
783 | if (ACPI_FAILURE(status)) { | |
761afb86 RW |
784 | if (acpi_target_sleep_state != ACPI_STATE_S0 || |
785 | status != AE_NOT_FOUND) | |
786 | d_max = d_min; | |
ad3399c3 RW |
787 | } else if (d_max < d_min) { |
788 | /* Warn the user of the broken DSDT */ | |
789 | printk(KERN_WARNING "ACPI: Wrong value from %s\n", | |
790 | acpi_method); | |
791 | /* Sanitize it */ | |
fd4aff1a | 792 | d_min = d_max; |
ad3399c3 | 793 | } |
fd4aff1a SL |
794 | } |
795 | ||
796 | if (d_min_p) | |
797 | *d_min_p = d_min; | |
798 | return d_max; | |
799 | } | |
aa338601 | 800 | #endif /* CONFIG_PM */ |
eb9d0fe4 | 801 | |
761afb86 | 802 | #ifdef CONFIG_PM_SLEEP |
b24e5098 LM |
803 | /** |
804 | * acpi_pm_device_run_wake - Enable/disable wake-up for given device. | |
805 | * @phys_dev: Device to enable/disable the platform to wake-up the system for. | |
806 | * @enable: Whether enable or disable the wake-up functionality. | |
807 | * | |
808 | * Find the ACPI device object corresponding to @pci_dev and try to | |
809 | * enable/disable the GPE associated with it. | |
810 | */ | |
811 | int acpi_pm_device_run_wake(struct device *phys_dev, bool enable) | |
812 | { | |
813 | struct acpi_device *dev; | |
814 | acpi_handle handle; | |
815 | ||
816 | if (!device_run_wake(phys_dev)) | |
817 | return -EINVAL; | |
818 | ||
819 | handle = DEVICE_ACPI_HANDLE(phys_dev); | |
820 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &dev))) { | |
821 | dev_dbg(phys_dev, "ACPI handle has no context in %s!\n", | |
822 | __func__); | |
823 | return -ENODEV; | |
824 | } | |
825 | ||
826 | if (enable) { | |
827 | acpi_enable_wakeup_device_power(dev, ACPI_STATE_S0); | |
828 | acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number); | |
829 | } else { | |
830 | acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number); | |
831 | acpi_disable_wakeup_device_power(dev); | |
832 | } | |
833 | ||
834 | return 0; | |
835 | } | |
836 | ||
eb9d0fe4 RW |
837 | /** |
838 | * acpi_pm_device_sleep_wake - enable or disable the system wake-up | |
839 | * capability of given device | |
840 | * @dev: device to handle | |
841 | * @enable: 'true' - enable, 'false' - disable the wake-up capability | |
842 | */ | |
843 | int acpi_pm_device_sleep_wake(struct device *dev, bool enable) | |
844 | { | |
845 | acpi_handle handle; | |
846 | struct acpi_device *adev; | |
df8db91f | 847 | int error; |
eb9d0fe4 | 848 | |
0baed8da | 849 | if (!device_can_wakeup(dev)) |
eb9d0fe4 RW |
850 | return -EINVAL; |
851 | ||
852 | handle = DEVICE_ACPI_HANDLE(dev); | |
853 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
df8db91f | 854 | dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__); |
eb9d0fe4 RW |
855 | return -ENODEV; |
856 | } | |
857 | ||
e8b6f970 RW |
858 | error = enable ? |
859 | acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) : | |
860 | acpi_disable_wakeup_device_power(adev); | |
df8db91f RW |
861 | if (!error) |
862 | dev_info(dev, "wake-up capability %s by ACPI\n", | |
863 | enable ? "enabled" : "disabled"); | |
864 | ||
865 | return error; | |
eb9d0fe4 | 866 | } |
761afb86 | 867 | #endif /* CONFIG_PM_SLEEP */ |
fd4aff1a | 868 | |
f216cc37 AS |
869 | static void acpi_power_off_prepare(void) |
870 | { | |
871 | /* Prepare to power off the system */ | |
872 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 873 | acpi_disable_all_gpes(); |
f216cc37 AS |
874 | } |
875 | ||
876 | static void acpi_power_off(void) | |
877 | { | |
878 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 879 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 880 | local_irq_disable(); |
2a14e541 | 881 | acpi_enter_sleep_state(ACPI_STATE_S5, wake_sleep_flags); |
f216cc37 AS |
882 | } |
883 | ||
96f15efc LB |
884 | /* |
885 | * ACPI 2.0 created the optional _GTS and _BFS, | |
886 | * but industry adoption has been neither rapid nor broad. | |
887 | * | |
888 | * Linux gets into trouble when it executes poorly validated | |
889 | * paths through the BIOS, so disable _GTS and _BFS by default, | |
890 | * but do speak up and offer the option to enable them. | |
891 | */ | |
01eac60b | 892 | static void __init acpi_gts_bfs_check(void) |
96f15efc LB |
893 | { |
894 | acpi_handle dummy; | |
895 | ||
4efeeecd | 896 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_PATHNAME__GTS, &dummy))) |
96f15efc LB |
897 | { |
898 | printk(KERN_NOTICE PREFIX "BIOS offers _GTS\n"); | |
899 | printk(KERN_NOTICE PREFIX "If \"acpi.gts=1\" improves suspend, " | |
900 | "please notify linux-acpi@vger.kernel.org\n"); | |
901 | } | |
4efeeecd | 902 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_PATHNAME__BFS, &dummy))) |
96f15efc LB |
903 | { |
904 | printk(KERN_NOTICE PREFIX "BIOS offers _BFS\n"); | |
905 | printk(KERN_NOTICE PREFIX "If \"acpi.bfs=1\" improves resume, " | |
906 | "please notify linux-acpi@vger.kernel.org\n"); | |
907 | } | |
908 | } | |
909 | ||
aafbcd16 | 910 | int __init acpi_sleep_init(void) |
1da177e4 | 911 | { |
296699de RW |
912 | acpi_status status; |
913 | u8 type_a, type_b; | |
914 | #ifdef CONFIG_SUSPEND | |
e2a5b420 | 915 | int i = 0; |
e41fb7c5 CC |
916 | |
917 | dmi_check_system(acpisleep_dmi_table); | |
296699de | 918 | #endif |
1da177e4 LT |
919 | |
920 | if (acpi_disabled) | |
921 | return 0; | |
922 | ||
5a50fe70 FP |
923 | sleep_states[ACPI_STATE_S0] = 1; |
924 | printk(KERN_INFO PREFIX "(supports S0"); | |
925 | ||
296699de | 926 | #ifdef CONFIG_SUSPEND |
5a50fe70 | 927 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { |
1da177e4 LT |
928 | status = acpi_get_sleep_type_data(i, &type_a, &type_b); |
929 | if (ACPI_SUCCESS(status)) { | |
930 | sleep_states[i] = 1; | |
931 | printk(" S%d", i); | |
932 | } | |
1da177e4 | 933 | } |
1da177e4 | 934 | |
d8f3de0d RW |
935 | suspend_set_ops(old_suspend_ordering ? |
936 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
296699de | 937 | #endif |
a3d25c27 | 938 | |
b0cb1a19 | 939 | #ifdef CONFIG_HIBERNATION |
296699de RW |
940 | status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); |
941 | if (ACPI_SUCCESS(status)) { | |
d8f3de0d RW |
942 | hibernation_set_ops(old_suspend_ordering ? |
943 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
296699de | 944 | sleep_states[ACPI_STATE_S4] = 1; |
f216cc37 | 945 | printk(" S4"); |
bdfe6b7c | 946 | if (!nosigcheck) { |
3d97e426 | 947 | acpi_get_table(ACPI_SIG_FACS, 1, |
bdfe6b7c SL |
948 | (struct acpi_table_header **)&facs); |
949 | if (facs) | |
950 | s4_hardware_signature = | |
951 | facs->hardware_signature; | |
952 | } | |
296699de | 953 | } |
a3d25c27 | 954 | #endif |
f216cc37 AS |
955 | status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
956 | if (ACPI_SUCCESS(status)) { | |
957 | sleep_states[ACPI_STATE_S5] = 1; | |
958 | printk(" S5"); | |
959 | pm_power_off_prepare = acpi_power_off_prepare; | |
960 | pm_power_off = acpi_power_off; | |
961 | } | |
962 | printk(")\n"); | |
e49f711c ZY |
963 | /* |
964 | * Register the tts_notifier to reboot notifier list so that the _TTS | |
965 | * object can also be evaluated when the system enters S5. | |
966 | */ | |
967 | register_reboot_notifier(&tts_notifier); | |
96f15efc | 968 | acpi_gts_bfs_check(); |
1da177e4 LT |
969 | return 0; |
970 | } |