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