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