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 | ||
01eac60b | 28 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
1da177e4 | 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(); | |
2f3f2226 | 73 | #endif |
c9b6c8f6 RW |
74 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
75 | acpi_state); | |
78f5f023 | 76 | acpi_enable_wakeup_devices(acpi_state); |
2f3f2226 AS |
77 | acpi_enter_sleep_state_prep(acpi_state); |
78 | return 0; | |
79 | } | |
80 | ||
5d1e072b | 81 | #ifdef CONFIG_ACPI_SLEEP |
091aad6a JB |
82 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
83 | ||
72ad5d77 RW |
84 | /* |
85 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
86 | * and to restore them during the subsequent resume. Windows does that also for | |
87 | * suspend to RAM. However, it is known that this mechanism does not work on | |
88 | * all machines, so we allow the user to disable it with the help of the | |
89 | * 'acpi_sleep=nonvs' kernel command line option. | |
90 | */ | |
91 | static bool nvs_nosave; | |
92 | ||
93 | void __init acpi_nvs_nosave(void) | |
94 | { | |
95 | nvs_nosave = true; | |
96 | } | |
97 | ||
d8f3de0d RW |
98 | /* |
99 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
100 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
101 | * kernel command line option that causes the following variable to be set. | |
102 | */ | |
103 | static bool old_suspend_ordering; | |
104 | ||
105 | void __init acpi_old_suspend_ordering(void) | |
106 | { | |
107 | old_suspend_ordering = true; | |
108 | } | |
109 | ||
110 | /** | |
d5a64513 | 111 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 112 | */ |
d5a64513 | 113 | static int acpi_pm_freeze(void) |
d8f3de0d | 114 | { |
3d97e426 | 115 | acpi_disable_all_gpes(); |
d5a64513 | 116 | acpi_os_wait_events_complete(NULL); |
fe955682 | 117 | acpi_ec_block_transactions(); |
d8f3de0d RW |
118 | return 0; |
119 | } | |
120 | ||
c5f7a1bb RW |
121 | /** |
122 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
123 | */ | |
124 | static int acpi_pm_pre_suspend(void) | |
125 | { | |
126 | acpi_pm_freeze(); | |
26fcaf60 | 127 | return suspend_nvs_save(); |
c5f7a1bb RW |
128 | } |
129 | ||
d8f3de0d RW |
130 | /** |
131 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
132 | * | |
133 | * If necessary, set the firmware waking vector and do arch-specific | |
134 | * nastiness to get the wakeup code to the waking vector. | |
135 | */ | |
136 | static int __acpi_pm_prepare(void) | |
137 | { | |
138 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
139 | if (error) |
140 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 141 | |
d8f3de0d RW |
142 | return error; |
143 | } | |
144 | ||
145 | /** | |
146 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
147 | * state and disable the GPEs. | |
148 | */ | |
149 | static int acpi_pm_prepare(void) | |
150 | { | |
151 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 152 | if (!error) |
26fcaf60 | 153 | error = acpi_pm_pre_suspend(); |
d5a64513 | 154 | |
d8f3de0d RW |
155 | return error; |
156 | } | |
157 | ||
158 | /** | |
159 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
160 | * | |
161 | * This is called after we wake back up (or if entering the sleep state | |
162 | * failed). | |
163 | */ | |
164 | static void acpi_pm_finish(void) | |
165 | { | |
166 | u32 acpi_state = acpi_target_sleep_state; | |
167 | ||
42de5532 | 168 | acpi_ec_unblock_transactions(); |
d551d81d | 169 | suspend_nvs_free(); |
2a6b6976 | 170 | |
d8f3de0d RW |
171 | if (acpi_state == ACPI_STATE_S0) |
172 | return; | |
1da177e4 | 173 | |
d8f3de0d RW |
174 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
175 | acpi_state); | |
78f5f023 | 176 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
177 | acpi_leave_sleep_state(acpi_state); |
178 | ||
179 | /* reset firmware waking vector */ | |
180 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
181 | ||
182 | acpi_target_sleep_state = ACPI_STATE_S0; | |
183 | } | |
184 | ||
185 | /** | |
186 | * acpi_pm_end - Finish up suspend sequence. | |
187 | */ | |
188 | static void acpi_pm_end(void) | |
189 | { | |
190 | /* | |
191 | * This is necessary in case acpi_pm_finish() is not called during a | |
192 | * failing transition to a sleep state. | |
193 | */ | |
194 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 195 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 196 | } |
92daa7b5 RW |
197 | #else /* !CONFIG_ACPI_SLEEP */ |
198 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
5d1e072b | 199 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 200 | |
d8f3de0d | 201 | #ifdef CONFIG_SUSPEND |
1da177e4 LT |
202 | extern void do_suspend_lowlevel(void); |
203 | ||
204 | static u32 acpi_suspend_states[] = { | |
e2a5b420 AS |
205 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
206 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
207 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 208 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
209 | }; |
210 | ||
e9b3aba8 | 211 | /** |
2c6e33c3 | 212 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
213 | * associated with given @pm_state, if supported. |
214 | */ | |
2c6e33c3 | 215 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
216 | { |
217 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
218 | int error = 0; | |
219 | ||
72ad5d77 | 220 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
221 | if (error) |
222 | return error; | |
223 | ||
e9b3aba8 RW |
224 | if (sleep_states[acpi_state]) { |
225 | acpi_target_sleep_state = acpi_state; | |
e49f711c | 226 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
e9b3aba8 RW |
227 | } else { |
228 | printk(KERN_ERR "ACPI does not support this state: %d\n", | |
229 | pm_state); | |
230 | error = -ENOSYS; | |
231 | } | |
232 | return error; | |
233 | } | |
234 | ||
1da177e4 | 235 | /** |
2c6e33c3 | 236 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 237 | * @pm_state: ignored |
1da177e4 | 238 | * |
50ad147a RW |
239 | * Flush caches and go to sleep. For STR we have to call arch-specific |
240 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
241 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
242 | */ | |
2c6e33c3 | 243 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
244 | { |
245 | acpi_status status = AE_OK; | |
e9b3aba8 | 246 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 247 | int error; |
1da177e4 LT |
248 | |
249 | ACPI_FLUSH_CPU_CACHE(); | |
250 | ||
e9b3aba8 RW |
251 | switch (acpi_state) { |
252 | case ACPI_STATE_S1: | |
1da177e4 LT |
253 | barrier(); |
254 | status = acpi_enter_sleep_state(acpi_state); | |
255 | break; | |
256 | ||
e9b3aba8 | 257 | case ACPI_STATE_S3: |
979f11b0 RW |
258 | error = acpi_save_state_mem(); |
259 | if (error) | |
260 | return error; | |
1da177e4 | 261 | do_suspend_lowlevel(); |
7a63f08b | 262 | pr_info(PREFIX "Low-level resume complete\n"); |
1da177e4 | 263 | break; |
1da177e4 | 264 | } |
872d83d0 | 265 | |
b6dacf63 MG |
266 | /* This violates the spec but is required for bug compatibility. */ |
267 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 268 | |
c95d47a8 RW |
269 | /* Reprogram control registers and execute _BFS */ |
270 | acpi_leave_sleep_state_prep(acpi_state); | |
271 | ||
23b168d4 | 272 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
273 | * of the OSPM to clear the status bit [ implying that the |
274 | * POWER_BUTTON event should not reach userspace ] | |
275 | */ | |
276 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) | |
277 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
278 | ||
a3627f67 SL |
279 | /* |
280 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
281 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
282 | * acpi_leave_sleep_state will reenable specific GPEs later | |
283 | */ | |
3d97e426 | 284 | acpi_disable_all_gpes(); |
d5a64513 | 285 | /* Allow EC transactions to happen. */ |
fe955682 | 286 | acpi_ec_unblock_transactions_early(); |
a3627f67 | 287 | |
2a6b6976 MG |
288 | suspend_nvs_restore(); |
289 | ||
1da177e4 LT |
290 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
291 | } | |
292 | ||
2c6e33c3 | 293 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 294 | { |
e8c9c502 | 295 | u32 acpi_state; |
eb9289eb | 296 | |
e8c9c502 JB |
297 | switch (pm_state) { |
298 | case PM_SUSPEND_ON: | |
299 | case PM_SUSPEND_STANDBY: | |
300 | case PM_SUSPEND_MEM: | |
301 | acpi_state = acpi_suspend_states[pm_state]; | |
302 | ||
303 | return sleep_states[acpi_state]; | |
304 | default: | |
305 | return 0; | |
306 | } | |
eb9289eb SL |
307 | } |
308 | ||
2f55ac07 | 309 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
310 | .valid = acpi_suspend_state_valid, |
311 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 312 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 313 | .enter = acpi_suspend_enter, |
618d7fd0 | 314 | .wake = acpi_pm_finish, |
d8f3de0d RW |
315 | .end = acpi_pm_end, |
316 | }; | |
317 | ||
318 | /** | |
319 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
320 | * state associated with given @pm_state, if supported, and | |
321 | * execute the _PTS control method. This function is used if the | |
322 | * pre-ACPI 2.0 suspend ordering has been requested. | |
323 | */ | |
324 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
325 | { | |
326 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
327 | if (!error) |
328 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 329 | |
d8f3de0d RW |
330 | return error; |
331 | } | |
332 | ||
333 | /* | |
334 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
335 | * been requested. | |
336 | */ | |
2f55ac07 | 337 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
338 | .valid = acpi_suspend_state_valid, |
339 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 340 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 341 | .enter = acpi_suspend_enter, |
618d7fd0 | 342 | .wake = acpi_pm_finish, |
d8f3de0d RW |
343 | .end = acpi_pm_end, |
344 | .recover = acpi_pm_finish, | |
1da177e4 | 345 | }; |
e41fb7c5 CC |
346 | |
347 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) | |
348 | { | |
349 | old_suspend_ordering = true; | |
350 | return 0; | |
351 | } | |
352 | ||
53998648 RW |
353 | static int __init init_nvs_nosave(const struct dmi_system_id *d) |
354 | { | |
355 | acpi_nvs_nosave(); | |
356 | return 0; | |
357 | } | |
358 | ||
e41fb7c5 CC |
359 | static struct dmi_system_id __initdata acpisleep_dmi_table[] = { |
360 | { | |
361 | .callback = init_old_suspend_ordering, | |
362 | .ident = "Abit KN9 (nForce4 variant)", | |
363 | .matches = { | |
364 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
365 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
366 | }, | |
367 | }, | |
4fb507b6 RW |
368 | { |
369 | .callback = init_old_suspend_ordering, | |
370 | .ident = "HP xw4600 Workstation", | |
371 | .matches = { | |
372 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
373 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
374 | }, | |
375 | }, | |
65df7847 | 376 | { |
a1404495 AW |
377 | .callback = init_old_suspend_ordering, |
378 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
379 | .matches = { | |
380 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
381 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
382 | }, | |
383 | }, | |
45e77988 | 384 | { |
2a9ef8e1 ZY |
385 | .callback = init_old_suspend_ordering, |
386 | .ident = "Panasonic CF51-2L", | |
387 | .matches = { | |
388 | DMI_MATCH(DMI_BOARD_VENDOR, | |
389 | "Matsushita Electric Industrial Co.,Ltd."), | |
390 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
391 | }, | |
392 | }, | |
53998648 RW |
393 | { |
394 | .callback = init_nvs_nosave, | |
395 | .ident = "Sony Vaio VGN-SR11M", | |
396 | .matches = { | |
397 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
398 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
399 | }, | |
400 | }, | |
401 | { | |
402 | .callback = init_nvs_nosave, | |
403 | .ident = "Everex StepNote Series", | |
404 | .matches = { | |
405 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
406 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
407 | }, | |
408 | }, | |
af48931c RW |
409 | { |
410 | .callback = init_nvs_nosave, | |
411 | .ident = "Sony Vaio VPCEB1Z1E", | |
412 | .matches = { | |
413 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
414 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
415 | }, | |
416 | }, | |
291a73c9 RW |
417 | { |
418 | .callback = init_nvs_nosave, | |
419 | .ident = "Sony Vaio VGN-NW130D", | |
420 | .matches = { | |
421 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
422 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
423 | }, | |
424 | }, | |
7b330707 RW |
425 | { |
426 | .callback = init_nvs_nosave, | |
427 | .ident = "Averatec AV1020-ED2", | |
428 | .matches = { | |
429 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
430 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
431 | }, | |
432 | }, | |
e41fb7c5 CC |
433 | {}, |
434 | }; | |
296699de RW |
435 | #endif /* CONFIG_SUSPEND */ |
436 | ||
b0cb1a19 | 437 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
438 | static unsigned long s4_hardware_signature; |
439 | static struct acpi_table_facs *facs; | |
440 | static bool nosigcheck; | |
441 | ||
442 | void __init acpi_no_s4_hw_signature(void) | |
443 | { | |
444 | nosigcheck = true; | |
445 | } | |
446 | ||
caea99ef | 447 | static int acpi_hibernation_begin(void) |
74f270af | 448 | { |
3f4b0ef7 RW |
449 | int error; |
450 | ||
72ad5d77 | 451 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
3f4b0ef7 RW |
452 | if (!error) { |
453 | acpi_target_sleep_state = ACPI_STATE_S4; | |
454 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
455 | } | |
456 | ||
457 | return error; | |
458 | } | |
459 | ||
a3d25c27 RW |
460 | static int acpi_hibernation_enter(void) |
461 | { | |
462 | acpi_status status = AE_OK; | |
463 | unsigned long flags = 0; | |
464 | ||
465 | ACPI_FLUSH_CPU_CACHE(); | |
466 | ||
467 | local_irq_save(flags); | |
a3d25c27 RW |
468 | /* This shouldn't return. If it returns, we have a problem */ |
469 | status = acpi_enter_sleep_state(ACPI_STATE_S4); | |
c95d47a8 RW |
470 | /* Reprogram control registers and execute _BFS */ |
471 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
472 | local_irq_restore(flags); |
473 | ||
474 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
475 | } | |
476 | ||
c7e0831d RW |
477 | static void acpi_hibernation_leave(void) |
478 | { | |
479 | /* | |
480 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
481 | * enable it here. | |
482 | */ | |
483 | acpi_enable(); | |
c95d47a8 RW |
484 | /* Reprogram control registers and execute _BFS */ |
485 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c SL |
486 | /* Check the hardware signature */ |
487 | if (facs && s4_hardware_signature != facs->hardware_signature) { | |
488 | printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " | |
489 | "cannot resume!\n"); | |
490 | panic("ACPI S4 hardware signature mismatch"); | |
491 | } | |
3f4b0ef7 | 492 | /* Restore the NVS memory area */ |
dd4c4f17 | 493 | suspend_nvs_restore(); |
d5a64513 | 494 | /* Allow EC transactions to happen. */ |
fe955682 | 495 | acpi_ec_unblock_transactions_early(); |
c7e0831d RW |
496 | } |
497 | ||
d5a64513 | 498 | static void acpi_pm_thaw(void) |
f6bb13aa | 499 | { |
fe955682 | 500 | acpi_ec_unblock_transactions(); |
3d97e426 | 501 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
502 | } |
503 | ||
073ef1f6 | 504 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
505 | .begin = acpi_hibernation_begin, |
506 | .end = acpi_pm_end, | |
c5f7a1bb | 507 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 508 | .finish = acpi_pm_finish, |
d8f3de0d RW |
509 | .prepare = acpi_pm_prepare, |
510 | .enter = acpi_hibernation_enter, | |
511 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
512 | .pre_restore = acpi_pm_freeze, |
513 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 514 | }; |
caea99ef | 515 | |
d8f3de0d RW |
516 | /** |
517 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
518 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
519 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
520 | * requested. | |
521 | */ | |
522 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 523 | { |
e49f711c ZY |
524 | int error; |
525 | /* | |
526 | * The _TTS object should always be evaluated before the _PTS object. | |
527 | * When the old_suspended_ordering is true, the _PTS object is | |
528 | * evaluated in the acpi_sleep_prepare. | |
529 | */ | |
530 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
531 | ||
532 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 533 | |
3f4b0ef7 | 534 | if (!error) { |
72ad5d77 | 535 | if (!nvs_nosave) |
dd4c4f17 | 536 | error = suspend_nvs_alloc(); |
3f4b0ef7 RW |
537 | if (!error) |
538 | acpi_target_sleep_state = ACPI_STATE_S4; | |
539 | } | |
540 | return error; | |
541 | } | |
542 | ||
d8f3de0d RW |
543 | /* |
544 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
545 | * been requested. | |
546 | */ | |
073ef1f6 | 547 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
548 | .begin = acpi_hibernation_begin_old, |
549 | .end = acpi_pm_end, | |
c5f7a1bb | 550 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 551 | .prepare = acpi_pm_freeze, |
2a6b6976 | 552 | .finish = acpi_pm_finish, |
a3d25c27 | 553 | .enter = acpi_hibernation_enter, |
c7e0831d | 554 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
555 | .pre_restore = acpi_pm_freeze, |
556 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 557 | .recover = acpi_pm_finish, |
a3d25c27 | 558 | }; |
d8f3de0d | 559 | #endif /* CONFIG_HIBERNATION */ |
a3d25c27 | 560 | |
296699de RW |
561 | int acpi_suspend(u32 acpi_state) |
562 | { | |
563 | suspend_state_t states[] = { | |
564 | [1] = PM_SUSPEND_STANDBY, | |
565 | [3] = PM_SUSPEND_MEM, | |
566 | [5] = PM_SUSPEND_MAX | |
567 | }; | |
568 | ||
569 | if (acpi_state < 6 && states[acpi_state]) | |
570 | return pm_suspend(states[acpi_state]); | |
571 | if (acpi_state == 4) | |
572 | return hibernate(); | |
573 | return -EINVAL; | |
574 | } | |
575 | ||
761afb86 | 576 | #ifdef CONFIG_PM_OPS |
fd4aff1a SL |
577 | /** |
578 | * acpi_pm_device_sleep_state - return preferred power state of ACPI device | |
579 | * in the system sleep state given by %acpi_target_sleep_state | |
2fe2de5f DB |
580 | * @dev: device to examine; its driver model wakeup flags control |
581 | * whether it should be able to wake up the system | |
fd4aff1a SL |
582 | * @d_min_p: used to store the upper limit of allowed states range |
583 | * Return value: preferred power state of the device on success, -ENODEV on | |
584 | * failure (ie. if there's no 'struct acpi_device' for @dev) | |
585 | * | |
586 | * Find the lowest power (highest number) ACPI device power state that | |
587 | * device @dev can be in while the system is in the sleep state represented | |
588 | * by %acpi_target_sleep_state. If @wake is nonzero, the device should be | |
589 | * able to wake up the system from this sleep state. If @d_min_p is set, | |
590 | * the highest power (lowest number) device power state of @dev allowed | |
591 | * in this system sleep state is stored at the location pointed to by it. | |
592 | * | |
593 | * The caller must ensure that @dev is valid before using this function. | |
594 | * The caller is also responsible for figuring out if the device is | |
595 | * supposed to be able to wake up the system and passing this information | |
596 | * via @wake. | |
597 | */ | |
598 | ||
2fe2de5f | 599 | int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p) |
fd4aff1a SL |
600 | { |
601 | acpi_handle handle = DEVICE_ACPI_HANDLE(dev); | |
602 | struct acpi_device *adev; | |
603 | char acpi_method[] = "_SxD"; | |
27663c58 | 604 | unsigned long long d_min, d_max; |
fd4aff1a SL |
605 | |
606 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
ead77594 | 607 | printk(KERN_DEBUG "ACPI handle has no context!\n"); |
fd4aff1a SL |
608 | return -ENODEV; |
609 | } | |
610 | ||
611 | acpi_method[2] = '0' + acpi_target_sleep_state; | |
612 | /* | |
613 | * If the sleep state is S0, we will return D3, but if the device has | |
614 | * _S0W, we will use the value from _S0W | |
615 | */ | |
616 | d_min = ACPI_STATE_D0; | |
617 | d_max = ACPI_STATE_D3; | |
618 | ||
619 | /* | |
620 | * If present, _SxD methods return the minimum D-state (highest power | |
621 | * state) we can use for the corresponding S-states. Otherwise, the | |
622 | * minimum D-state is D0 (ACPI 3.x). | |
623 | * | |
624 | * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer | |
625 | * provided -- that's our fault recovery, we ignore retval. | |
626 | */ | |
627 | if (acpi_target_sleep_state > ACPI_STATE_S0) | |
628 | acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); | |
629 | ||
630 | /* | |
631 | * If _PRW says we can wake up the system from the target sleep state, | |
632 | * the D-state returned by _SxD is sufficient for that (we assume a | |
633 | * wakeup-aware driver if wake is set). Still, if _SxW exists | |
634 | * (ACPI 3.x), it should return the maximum (lowest power) D-state that | |
635 | * can wake the system. _S0W may be valid, too. | |
636 | */ | |
637 | if (acpi_target_sleep_state == ACPI_STATE_S0 || | |
761afb86 | 638 | (device_may_wakeup(dev) && |
fd4aff1a | 639 | adev->wakeup.sleep_state <= acpi_target_sleep_state)) { |
ad3399c3 RW |
640 | acpi_status status; |
641 | ||
fd4aff1a | 642 | acpi_method[3] = 'W'; |
ad3399c3 RW |
643 | status = acpi_evaluate_integer(handle, acpi_method, NULL, |
644 | &d_max); | |
645 | if (ACPI_FAILURE(status)) { | |
761afb86 RW |
646 | if (acpi_target_sleep_state != ACPI_STATE_S0 || |
647 | status != AE_NOT_FOUND) | |
648 | d_max = d_min; | |
ad3399c3 RW |
649 | } else if (d_max < d_min) { |
650 | /* Warn the user of the broken DSDT */ | |
651 | printk(KERN_WARNING "ACPI: Wrong value from %s\n", | |
652 | acpi_method); | |
653 | /* Sanitize it */ | |
fd4aff1a | 654 | d_min = d_max; |
ad3399c3 | 655 | } |
fd4aff1a SL |
656 | } |
657 | ||
658 | if (d_min_p) | |
659 | *d_min_p = d_min; | |
660 | return d_max; | |
661 | } | |
761afb86 | 662 | #endif /* CONFIG_PM_OPS */ |
eb9d0fe4 | 663 | |
761afb86 | 664 | #ifdef CONFIG_PM_SLEEP |
eb9d0fe4 RW |
665 | /** |
666 | * acpi_pm_device_sleep_wake - enable or disable the system wake-up | |
667 | * capability of given device | |
668 | * @dev: device to handle | |
669 | * @enable: 'true' - enable, 'false' - disable the wake-up capability | |
670 | */ | |
671 | int acpi_pm_device_sleep_wake(struct device *dev, bool enable) | |
672 | { | |
673 | acpi_handle handle; | |
674 | struct acpi_device *adev; | |
df8db91f | 675 | int error; |
eb9d0fe4 | 676 | |
0baed8da | 677 | if (!device_can_wakeup(dev)) |
eb9d0fe4 RW |
678 | return -EINVAL; |
679 | ||
680 | handle = DEVICE_ACPI_HANDLE(dev); | |
681 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
df8db91f | 682 | dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__); |
eb9d0fe4 RW |
683 | return -ENODEV; |
684 | } | |
685 | ||
e8b6f970 RW |
686 | error = enable ? |
687 | acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) : | |
688 | acpi_disable_wakeup_device_power(adev); | |
df8db91f RW |
689 | if (!error) |
690 | dev_info(dev, "wake-up capability %s by ACPI\n", | |
691 | enable ? "enabled" : "disabled"); | |
692 | ||
693 | return error; | |
eb9d0fe4 | 694 | } |
761afb86 | 695 | #endif /* CONFIG_PM_SLEEP */ |
fd4aff1a | 696 | |
f216cc37 AS |
697 | static void acpi_power_off_prepare(void) |
698 | { | |
699 | /* Prepare to power off the system */ | |
700 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 701 | acpi_disable_all_gpes(); |
f216cc37 AS |
702 | } |
703 | ||
704 | static void acpi_power_off(void) | |
705 | { | |
706 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 707 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 AS |
708 | local_irq_disable(); |
709 | acpi_enter_sleep_state(ACPI_STATE_S5); | |
710 | } | |
711 | ||
96f15efc LB |
712 | /* |
713 | * ACPI 2.0 created the optional _GTS and _BFS, | |
714 | * but industry adoption has been neither rapid nor broad. | |
715 | * | |
716 | * Linux gets into trouble when it executes poorly validated | |
717 | * paths through the BIOS, so disable _GTS and _BFS by default, | |
718 | * but do speak up and offer the option to enable them. | |
719 | */ | |
01eac60b | 720 | static void __init acpi_gts_bfs_check(void) |
96f15efc LB |
721 | { |
722 | acpi_handle dummy; | |
723 | ||
724 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__GTS, &dummy))) | |
725 | { | |
726 | printk(KERN_NOTICE PREFIX "BIOS offers _GTS\n"); | |
727 | printk(KERN_NOTICE PREFIX "If \"acpi.gts=1\" improves suspend, " | |
728 | "please notify linux-acpi@vger.kernel.org\n"); | |
729 | } | |
730 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__BFS, &dummy))) | |
731 | { | |
732 | printk(KERN_NOTICE PREFIX "BIOS offers _BFS\n"); | |
733 | printk(KERN_NOTICE PREFIX "If \"acpi.bfs=1\" improves resume, " | |
734 | "please notify linux-acpi@vger.kernel.org\n"); | |
735 | } | |
736 | } | |
737 | ||
aafbcd16 | 738 | int __init acpi_sleep_init(void) |
1da177e4 | 739 | { |
296699de RW |
740 | acpi_status status; |
741 | u8 type_a, type_b; | |
742 | #ifdef CONFIG_SUSPEND | |
e2a5b420 | 743 | int i = 0; |
e41fb7c5 CC |
744 | |
745 | dmi_check_system(acpisleep_dmi_table); | |
296699de | 746 | #endif |
1da177e4 LT |
747 | |
748 | if (acpi_disabled) | |
749 | return 0; | |
750 | ||
5a50fe70 FP |
751 | sleep_states[ACPI_STATE_S0] = 1; |
752 | printk(KERN_INFO PREFIX "(supports S0"); | |
753 | ||
296699de | 754 | #ifdef CONFIG_SUSPEND |
5a50fe70 | 755 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { |
1da177e4 LT |
756 | status = acpi_get_sleep_type_data(i, &type_a, &type_b); |
757 | if (ACPI_SUCCESS(status)) { | |
758 | sleep_states[i] = 1; | |
759 | printk(" S%d", i); | |
760 | } | |
1da177e4 | 761 | } |
1da177e4 | 762 | |
d8f3de0d RW |
763 | suspend_set_ops(old_suspend_ordering ? |
764 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
296699de | 765 | #endif |
a3d25c27 | 766 | |
b0cb1a19 | 767 | #ifdef CONFIG_HIBERNATION |
296699de RW |
768 | status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); |
769 | if (ACPI_SUCCESS(status)) { | |
d8f3de0d RW |
770 | hibernation_set_ops(old_suspend_ordering ? |
771 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
296699de | 772 | sleep_states[ACPI_STATE_S4] = 1; |
f216cc37 | 773 | printk(" S4"); |
bdfe6b7c | 774 | if (!nosigcheck) { |
3d97e426 | 775 | acpi_get_table(ACPI_SIG_FACS, 1, |
bdfe6b7c SL |
776 | (struct acpi_table_header **)&facs); |
777 | if (facs) | |
778 | s4_hardware_signature = | |
779 | facs->hardware_signature; | |
780 | } | |
296699de | 781 | } |
a3d25c27 | 782 | #endif |
f216cc37 AS |
783 | status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
784 | if (ACPI_SUCCESS(status)) { | |
785 | sleep_states[ACPI_STATE_S5] = 1; | |
786 | printk(" S5"); | |
787 | pm_power_off_prepare = acpi_power_off_prepare; | |
788 | pm_power_off = acpi_power_off; | |
789 | } | |
790 | printk(")\n"); | |
e49f711c ZY |
791 | /* |
792 | * Register the tts_notifier to reboot notifier list so that the _TTS | |
793 | * object can also be evaluated when the system enters S5. | |
794 | */ | |
795 | register_reboot_notifier(&tts_notifier); | |
96f15efc | 796 | acpi_gts_bfs_check(); |
1da177e4 LT |
797 | return 0; |
798 | } |