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> |
d1ee4335 | 19 | #include <linux/acpi.h> |
a2ef5c4f | 20 | #include <linux/module.h> |
f216cc37 AS |
21 | #include <asm/io.h> |
22 | ||
e60cc7a6 | 23 | #include "internal.h" |
1da177e4 LT |
24 | #include "sleep.h" |
25 | ||
01eac60b | 26 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
1da177e4 | 27 | |
e49f711c ZY |
28 | static void acpi_sleep_tts_switch(u32 acpi_state) |
29 | { | |
0db98202 | 30 | acpi_status status; |
e49f711c | 31 | |
0db98202 | 32 | status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state); |
e49f711c ZY |
33 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
34 | /* | |
35 | * OS can't evaluate the _TTS object correctly. Some warning | |
36 | * message will be printed. But it won't break anything. | |
37 | */ | |
38 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); | |
39 | } | |
40 | } | |
41 | ||
42 | static int tts_notify_reboot(struct notifier_block *this, | |
43 | unsigned long code, void *x) | |
44 | { | |
45 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
46 | return NOTIFY_DONE; | |
47 | } | |
48 | ||
49 | static struct notifier_block tts_notifier = { | |
50 | .notifier_call = tts_notify_reboot, | |
51 | .next = NULL, | |
52 | .priority = 0, | |
53 | }; | |
54 | ||
c9b6c8f6 | 55 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
56 | { |
57 | #ifdef CONFIG_ACPI_SLEEP | |
58 | /* do we have a wakeup address for S2 and S3? */ | |
59 | if (acpi_state == ACPI_STATE_S3) { | |
319b6ffc | 60 | if (!acpi_wakeup_address) |
2f3f2226 | 61 | return -EFAULT; |
319b6ffc | 62 | acpi_set_firmware_waking_vector(acpi_wakeup_address); |
2f3f2226 AS |
63 | |
64 | } | |
65 | ACPI_FLUSH_CPU_CACHE(); | |
2f3f2226 | 66 | #endif |
c9b6c8f6 RW |
67 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
68 | acpi_state); | |
78f5f023 | 69 | acpi_enable_wakeup_devices(acpi_state); |
2f3f2226 AS |
70 | acpi_enter_sleep_state_prep(acpi_state); |
71 | return 0; | |
72 | } | |
73 | ||
a4e90bed RW |
74 | static bool acpi_sleep_state_supported(u8 sleep_state) |
75 | { | |
76 | acpi_status status; | |
77 | u8 type_a, type_b; | |
78 | ||
79 | status = acpi_get_sleep_type_data(sleep_state, &type_a, &type_b); | |
80 | return ACPI_SUCCESS(status) && (!acpi_gbl_reduced_hardware | |
81 | || (acpi_gbl_FADT.sleep_control.address | |
82 | && acpi_gbl_FADT.sleep_status.address)); | |
83 | } | |
84 | ||
5d1e072b | 85 | #ifdef CONFIG_ACPI_SLEEP |
091aad6a | 86 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
a6ae7594 RW |
87 | |
88 | u32 acpi_target_system_state(void) | |
89 | { | |
90 | return acpi_target_sleep_state; | |
91 | } | |
92 | ||
a5ca7345 | 93 | static bool pwr_btn_event_pending; |
091aad6a | 94 | |
72ad5d77 RW |
95 | /* |
96 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
97 | * and to restore them during the subsequent resume. Windows does that also for | |
98 | * suspend to RAM. However, it is known that this mechanism does not work on | |
99 | * all machines, so we allow the user to disable it with the help of the | |
100 | * 'acpi_sleep=nonvs' kernel command line option. | |
101 | */ | |
102 | static bool nvs_nosave; | |
103 | ||
104 | void __init acpi_nvs_nosave(void) | |
105 | { | |
106 | nvs_nosave = true; | |
107 | } | |
108 | ||
1bad2f19 KCA |
109 | /* |
110 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
111 | * but says nothing about saving NVS during S3. Not all versions of Windows | |
112 | * save NVS on S3 suspend either, and it is clear that not all systems need | |
113 | * NVS to be saved at S3 time. To improve suspend/resume time, allow the | |
114 | * user to disable saving NVS on S3 if their system does not require it, but | |
115 | * continue to save/restore NVS for S4 as specified. | |
116 | */ | |
117 | static bool nvs_nosave_s3; | |
118 | ||
119 | void __init acpi_nvs_nosave_s3(void) | |
120 | { | |
121 | nvs_nosave_s3 = true; | |
122 | } | |
123 | ||
d8f3de0d RW |
124 | /* |
125 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
126 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
127 | * kernel command line option that causes the following variable to be set. | |
128 | */ | |
129 | static bool old_suspend_ordering; | |
130 | ||
131 | void __init acpi_old_suspend_ordering(void) | |
132 | { | |
133 | old_suspend_ordering = true; | |
134 | } | |
135 | ||
0ac1b1d7 ZR |
136 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
137 | { | |
138 | acpi_old_suspend_ordering(); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | static int __init init_nvs_nosave(const struct dmi_system_id *d) | |
143 | { | |
144 | acpi_nvs_nosave(); | |
145 | return 0; | |
146 | } | |
147 | ||
3e4376ff | 148 | static struct dmi_system_id acpisleep_dmi_table[] __initdata = { |
0ac1b1d7 ZR |
149 | { |
150 | .callback = init_old_suspend_ordering, | |
151 | .ident = "Abit KN9 (nForce4 variant)", | |
152 | .matches = { | |
153 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
154 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
155 | }, | |
156 | }, | |
157 | { | |
158 | .callback = init_old_suspend_ordering, | |
159 | .ident = "HP xw4600 Workstation", | |
160 | .matches = { | |
161 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
162 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
163 | }, | |
164 | }, | |
165 | { | |
166 | .callback = init_old_suspend_ordering, | |
167 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
168 | .matches = { | |
169 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
170 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
171 | }, | |
172 | }, | |
173 | { | |
174 | .callback = init_old_suspend_ordering, | |
175 | .ident = "Panasonic CF51-2L", | |
176 | .matches = { | |
177 | DMI_MATCH(DMI_BOARD_VENDOR, | |
178 | "Matsushita Electric Industrial Co.,Ltd."), | |
179 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
180 | }, | |
181 | }, | |
182 | { | |
183 | .callback = init_nvs_nosave, | |
66f2fda9 JS |
184 | .ident = "Sony Vaio VGN-FW41E_H", |
185 | .matches = { | |
186 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
187 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"), | |
188 | }, | |
189 | }, | |
190 | { | |
191 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
192 | .ident = "Sony Vaio VGN-FW21E", |
193 | .matches = { | |
194 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
195 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
196 | }, | |
197 | }, | |
198 | { | |
199 | .callback = init_nvs_nosave, | |
469dd1c4 FV |
200 | .ident = "Sony Vaio VGN-FW21M", |
201 | .matches = { | |
202 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
203 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"), | |
204 | }, | |
205 | }, | |
206 | { | |
207 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
208 | .ident = "Sony Vaio VPCEB17FX", |
209 | .matches = { | |
210 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
211 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
212 | }, | |
213 | }, | |
214 | { | |
215 | .callback = init_nvs_nosave, | |
216 | .ident = "Sony Vaio VGN-SR11M", | |
217 | .matches = { | |
218 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
219 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
220 | }, | |
221 | }, | |
222 | { | |
223 | .callback = init_nvs_nosave, | |
224 | .ident = "Everex StepNote Series", | |
225 | .matches = { | |
226 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
227 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
228 | }, | |
229 | }, | |
230 | { | |
231 | .callback = init_nvs_nosave, | |
232 | .ident = "Sony Vaio VPCEB1Z1E", | |
233 | .matches = { | |
234 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
235 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
236 | }, | |
237 | }, | |
238 | { | |
239 | .callback = init_nvs_nosave, | |
240 | .ident = "Sony Vaio VGN-NW130D", | |
241 | .matches = { | |
242 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
243 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
244 | }, | |
245 | }, | |
246 | { | |
247 | .callback = init_nvs_nosave, | |
248 | .ident = "Sony Vaio VPCCW29FX", | |
249 | .matches = { | |
250 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
251 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
252 | }, | |
253 | }, | |
254 | { | |
255 | .callback = init_nvs_nosave, | |
256 | .ident = "Averatec AV1020-ED2", | |
257 | .matches = { | |
258 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
259 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
260 | }, | |
261 | }, | |
262 | { | |
263 | .callback = init_old_suspend_ordering, | |
264 | .ident = "Asus A8N-SLI DELUXE", | |
265 | .matches = { | |
266 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
267 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
268 | }, | |
269 | }, | |
270 | { | |
271 | .callback = init_old_suspend_ordering, | |
272 | .ident = "Asus A8N-SLI Premium", | |
273 | .matches = { | |
274 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
275 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
276 | }, | |
277 | }, | |
278 | { | |
279 | .callback = init_nvs_nosave, | |
280 | .ident = "Sony Vaio VGN-SR26GN_P", | |
281 | .matches = { | |
282 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
283 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
284 | }, | |
285 | }, | |
286 | { | |
287 | .callback = init_nvs_nosave, | |
288 | .ident = "Sony Vaio VPCEB1S1E", | |
289 | .matches = { | |
290 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
291 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), | |
292 | }, | |
293 | }, | |
294 | { | |
295 | .callback = init_nvs_nosave, | |
296 | .ident = "Sony Vaio VGN-FW520F", | |
297 | .matches = { | |
298 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
299 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
300 | }, | |
301 | }, | |
302 | { | |
303 | .callback = init_nvs_nosave, | |
304 | .ident = "Asus K54C", | |
305 | .matches = { | |
306 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
307 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
308 | }, | |
309 | }, | |
310 | { | |
311 | .callback = init_nvs_nosave, | |
312 | .ident = "Asus K54HR", | |
313 | .matches = { | |
314 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
315 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
316 | }, | |
317 | }, | |
318 | {}, | |
319 | }; | |
320 | ||
321 | static void acpi_sleep_dmi_check(void) | |
322 | { | |
323 | dmi_check_system(acpisleep_dmi_table); | |
324 | } | |
325 | ||
d8f3de0d | 326 | /** |
d5a64513 | 327 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 328 | */ |
d5a64513 | 329 | static int acpi_pm_freeze(void) |
d8f3de0d | 330 | { |
3d97e426 | 331 | acpi_disable_all_gpes(); |
bd6f10a5 | 332 | acpi_os_wait_events_complete(); |
fe955682 | 333 | acpi_ec_block_transactions(); |
d8f3de0d RW |
334 | return 0; |
335 | } | |
336 | ||
c5f7a1bb RW |
337 | /** |
338 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
339 | */ | |
340 | static int acpi_pm_pre_suspend(void) | |
341 | { | |
342 | acpi_pm_freeze(); | |
26fcaf60 | 343 | return suspend_nvs_save(); |
c5f7a1bb RW |
344 | } |
345 | ||
d8f3de0d RW |
346 | /** |
347 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
348 | * | |
349 | * If necessary, set the firmware waking vector and do arch-specific | |
350 | * nastiness to get the wakeup code to the waking vector. | |
351 | */ | |
352 | static int __acpi_pm_prepare(void) | |
353 | { | |
354 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
355 | if (error) |
356 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 357 | |
d8f3de0d RW |
358 | return error; |
359 | } | |
360 | ||
361 | /** | |
362 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
363 | * state and disable the GPEs. | |
364 | */ | |
365 | static int acpi_pm_prepare(void) | |
366 | { | |
367 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 368 | if (!error) |
26fcaf60 | 369 | error = acpi_pm_pre_suspend(); |
d5a64513 | 370 | |
d8f3de0d RW |
371 | return error; |
372 | } | |
373 | ||
c10d7a13 DD |
374 | static int find_powerf_dev(struct device *dev, void *data) |
375 | { | |
376 | struct acpi_device *device = to_acpi_device(dev); | |
377 | const char *hid = acpi_device_hid(device); | |
378 | ||
379 | return !strcmp(hid, ACPI_BUTTON_HID_POWERF); | |
380 | } | |
381 | ||
d8f3de0d RW |
382 | /** |
383 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
384 | * | |
385 | * This is called after we wake back up (or if entering the sleep state | |
386 | * failed). | |
387 | */ | |
388 | static void acpi_pm_finish(void) | |
389 | { | |
c10d7a13 | 390 | struct device *pwr_btn_dev; |
d8f3de0d RW |
391 | u32 acpi_state = acpi_target_sleep_state; |
392 | ||
42de5532 | 393 | acpi_ec_unblock_transactions(); |
d551d81d | 394 | suspend_nvs_free(); |
2a6b6976 | 395 | |
d8f3de0d RW |
396 | if (acpi_state == ACPI_STATE_S0) |
397 | return; | |
1da177e4 | 398 | |
d8f3de0d RW |
399 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
400 | acpi_state); | |
78f5f023 | 401 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
402 | acpi_leave_sleep_state(acpi_state); |
403 | ||
404 | /* reset firmware waking vector */ | |
405 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
406 | ||
407 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c10d7a13 | 408 | |
781d737c RW |
409 | acpi_resume_power_resources(); |
410 | ||
c10d7a13 DD |
411 | /* If we were woken with the fixed power button, provide a small |
412 | * hint to userspace in the form of a wakeup event on the fixed power | |
413 | * button device (if it can be found). | |
414 | * | |
415 | * We delay the event generation til now, as the PM layer requires | |
416 | * timekeeping to be running before we generate events. */ | |
417 | if (!pwr_btn_event_pending) | |
418 | return; | |
419 | ||
420 | pwr_btn_event_pending = false; | |
421 | pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, | |
422 | find_powerf_dev); | |
423 | if (pwr_btn_dev) { | |
424 | pm_wakeup_event(pwr_btn_dev, 0); | |
425 | put_device(pwr_btn_dev); | |
426 | } | |
d8f3de0d RW |
427 | } |
428 | ||
429 | /** | |
ad07277e RW |
430 | * acpi_pm_start - Start system PM transition. |
431 | */ | |
432 | static void acpi_pm_start(u32 acpi_state) | |
433 | { | |
434 | acpi_target_sleep_state = acpi_state; | |
435 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
436 | acpi_scan_lock_acquire(); | |
437 | } | |
438 | ||
439 | /** | |
440 | * acpi_pm_end - Finish up system PM transition. | |
d8f3de0d RW |
441 | */ |
442 | static void acpi_pm_end(void) | |
443 | { | |
ad07277e | 444 | acpi_scan_lock_release(); |
d8f3de0d RW |
445 | /* |
446 | * This is necessary in case acpi_pm_finish() is not called during a | |
447 | * failing transition to a sleep state. | |
448 | */ | |
449 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 450 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 451 | } |
92daa7b5 RW |
452 | #else /* !CONFIG_ACPI_SLEEP */ |
453 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
0ac1b1d7 | 454 | static inline void acpi_sleep_dmi_check(void) {} |
5d1e072b | 455 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 456 | |
d8f3de0d | 457 | #ifdef CONFIG_SUSPEND |
1da177e4 | 458 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
459 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
460 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
461 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 462 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
463 | }; |
464 | ||
e9b3aba8 | 465 | /** |
2c6e33c3 | 466 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
467 | * associated with given @pm_state, if supported. |
468 | */ | |
2c6e33c3 | 469 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
470 | { |
471 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
ad07277e | 472 | int error; |
e9b3aba8 | 473 | |
1bad2f19 | 474 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
475 | if (error) |
476 | return error; | |
477 | ||
ad07277e RW |
478 | if (!sleep_states[acpi_state]) { |
479 | pr_err("ACPI does not support sleep state S%u\n", acpi_state); | |
480 | return -ENOSYS; | |
e9b3aba8 | 481 | } |
ad07277e RW |
482 | |
483 | acpi_pm_start(acpi_state); | |
484 | return 0; | |
e9b3aba8 RW |
485 | } |
486 | ||
1da177e4 | 487 | /** |
2c6e33c3 | 488 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 489 | * @pm_state: ignored |
1da177e4 | 490 | * |
50ad147a RW |
491 | * Flush caches and go to sleep. For STR we have to call arch-specific |
492 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
493 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
494 | */ | |
2c6e33c3 | 495 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
496 | { |
497 | acpi_status status = AE_OK; | |
e9b3aba8 | 498 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 499 | int error; |
1da177e4 LT |
500 | |
501 | ACPI_FLUSH_CPU_CACHE(); | |
502 | ||
e9b3aba8 RW |
503 | switch (acpi_state) { |
504 | case ACPI_STATE_S1: | |
1da177e4 | 505 | barrier(); |
3f6f49c7 | 506 | status = acpi_enter_sleep_state(acpi_state); |
1da177e4 LT |
507 | break; |
508 | ||
e9b3aba8 | 509 | case ACPI_STATE_S3: |
d6a77ead KRW |
510 | if (!acpi_suspend_lowlevel) |
511 | return -ENOSYS; | |
f1a2003e | 512 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
513 | if (error) |
514 | return error; | |
7a63f08b | 515 | pr_info(PREFIX "Low-level resume complete\n"); |
1da177e4 | 516 | break; |
1da177e4 | 517 | } |
872d83d0 | 518 | |
b6dacf63 MG |
519 | /* This violates the spec but is required for bug compatibility. */ |
520 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 521 | |
3f6f49c7 LB |
522 | /* Reprogram control registers */ |
523 | acpi_leave_sleep_state_prep(acpi_state); | |
c95d47a8 | 524 | |
23b168d4 | 525 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
526 | * of the OSPM to clear the status bit [ implying that the |
527 | * POWER_BUTTON event should not reach userspace ] | |
c10d7a13 DD |
528 | * |
529 | * However, we do generate a small hint for userspace in the form of | |
530 | * a wakeup event. We flag this condition for now and generate the | |
531 | * event later, as we're currently too early in resume to be able to | |
532 | * generate wakeup events. | |
872d83d0 | 533 | */ |
c10d7a13 | 534 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
51468a9d | 535 | acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED; |
c10d7a13 DD |
536 | |
537 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); | |
538 | ||
539 | if (pwr_btn_status & ACPI_EVENT_FLAG_SET) { | |
540 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
541 | /* Flag for later */ | |
542 | pwr_btn_event_pending = true; | |
543 | } | |
544 | } | |
872d83d0 | 545 | |
a3627f67 SL |
546 | /* |
547 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
548 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
549 | * acpi_leave_sleep_state will reenable specific GPEs later | |
550 | */ | |
3d97e426 | 551 | acpi_disable_all_gpes(); |
d5a64513 | 552 | /* Allow EC transactions to happen. */ |
fe955682 | 553 | acpi_ec_unblock_transactions_early(); |
a3627f67 | 554 | |
2a6b6976 MG |
555 | suspend_nvs_restore(); |
556 | ||
1da177e4 LT |
557 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
558 | } | |
559 | ||
2c6e33c3 | 560 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 561 | { |
e8c9c502 | 562 | u32 acpi_state; |
eb9289eb | 563 | |
e8c9c502 JB |
564 | switch (pm_state) { |
565 | case PM_SUSPEND_ON: | |
566 | case PM_SUSPEND_STANDBY: | |
567 | case PM_SUSPEND_MEM: | |
568 | acpi_state = acpi_suspend_states[pm_state]; | |
569 | ||
570 | return sleep_states[acpi_state]; | |
571 | default: | |
572 | return 0; | |
573 | } | |
eb9289eb SL |
574 | } |
575 | ||
2f55ac07 | 576 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
577 | .valid = acpi_suspend_state_valid, |
578 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 579 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 580 | .enter = acpi_suspend_enter, |
618d7fd0 | 581 | .wake = acpi_pm_finish, |
d8f3de0d RW |
582 | .end = acpi_pm_end, |
583 | }; | |
584 | ||
585 | /** | |
586 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
587 | * state associated with given @pm_state, if supported, and | |
588 | * execute the _PTS control method. This function is used if the | |
589 | * pre-ACPI 2.0 suspend ordering has been requested. | |
590 | */ | |
591 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
592 | { | |
593 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
594 | if (!error) |
595 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 596 | |
d8f3de0d RW |
597 | return error; |
598 | } | |
599 | ||
600 | /* | |
601 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
602 | * been requested. | |
603 | */ | |
2f55ac07 | 604 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
605 | .valid = acpi_suspend_state_valid, |
606 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 607 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 608 | .enter = acpi_suspend_enter, |
618d7fd0 | 609 | .wake = acpi_pm_finish, |
d8f3de0d RW |
610 | .end = acpi_pm_end, |
611 | .recover = acpi_pm_finish, | |
1da177e4 | 612 | }; |
02040f0b RW |
613 | |
614 | static void acpi_sleep_suspend_setup(void) | |
615 | { | |
616 | int i; | |
617 | ||
a4e90bed RW |
618 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) |
619 | if (acpi_sleep_state_supported(i)) | |
02040f0b | 620 | sleep_states[i] = 1; |
02040f0b RW |
621 | |
622 | suspend_set_ops(old_suspend_ordering ? | |
623 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
624 | } | |
625 | #else /* !CONFIG_SUSPEND */ | |
626 | static inline void acpi_sleep_suspend_setup(void) {} | |
627 | #endif /* !CONFIG_SUSPEND */ | |
296699de | 628 | |
b0cb1a19 | 629 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
630 | static unsigned long s4_hardware_signature; |
631 | static struct acpi_table_facs *facs; | |
632 | static bool nosigcheck; | |
633 | ||
634 | void __init acpi_no_s4_hw_signature(void) | |
635 | { | |
636 | nosigcheck = true; | |
637 | } | |
638 | ||
caea99ef | 639 | static int acpi_hibernation_begin(void) |
74f270af | 640 | { |
3f4b0ef7 RW |
641 | int error; |
642 | ||
72ad5d77 | 643 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
ad07277e RW |
644 | if (!error) |
645 | acpi_pm_start(ACPI_STATE_S4); | |
3f4b0ef7 RW |
646 | |
647 | return error; | |
648 | } | |
649 | ||
a3d25c27 RW |
650 | static int acpi_hibernation_enter(void) |
651 | { | |
652 | acpi_status status = AE_OK; | |
a3d25c27 RW |
653 | |
654 | ACPI_FLUSH_CPU_CACHE(); | |
655 | ||
a3d25c27 | 656 | /* This shouldn't return. If it returns, we have a problem */ |
3f6f49c7 LB |
657 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
658 | /* Reprogram control registers */ | |
659 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
660 | |
661 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
662 | } | |
663 | ||
c7e0831d RW |
664 | static void acpi_hibernation_leave(void) |
665 | { | |
666 | /* | |
667 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
668 | * enable it here. | |
669 | */ | |
670 | acpi_enable(); | |
3f6f49c7 LB |
671 | /* Reprogram control registers */ |
672 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c | 673 | /* Check the hardware signature */ |
5c551e62 ON |
674 | if (facs && s4_hardware_signature != facs->hardware_signature) |
675 | pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n"); | |
3f4b0ef7 | 676 | /* Restore the NVS memory area */ |
dd4c4f17 | 677 | suspend_nvs_restore(); |
d5a64513 | 678 | /* Allow EC transactions to happen. */ |
fe955682 | 679 | acpi_ec_unblock_transactions_early(); |
c7e0831d RW |
680 | } |
681 | ||
d5a64513 | 682 | static void acpi_pm_thaw(void) |
f6bb13aa | 683 | { |
fe955682 | 684 | acpi_ec_unblock_transactions(); |
3d97e426 | 685 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
686 | } |
687 | ||
073ef1f6 | 688 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
689 | .begin = acpi_hibernation_begin, |
690 | .end = acpi_pm_end, | |
c5f7a1bb | 691 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 692 | .finish = acpi_pm_finish, |
d8f3de0d RW |
693 | .prepare = acpi_pm_prepare, |
694 | .enter = acpi_hibernation_enter, | |
695 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
696 | .pre_restore = acpi_pm_freeze, |
697 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 698 | }; |
caea99ef | 699 | |
d8f3de0d RW |
700 | /** |
701 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
702 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
703 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
704 | * requested. | |
705 | */ | |
706 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 707 | { |
e49f711c ZY |
708 | int error; |
709 | /* | |
710 | * The _TTS object should always be evaluated before the _PTS object. | |
711 | * When the old_suspended_ordering is true, the _PTS object is | |
712 | * evaluated in the acpi_sleep_prepare. | |
713 | */ | |
714 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
715 | ||
716 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 717 | |
3f4b0ef7 | 718 | if (!error) { |
72ad5d77 | 719 | if (!nvs_nosave) |
dd4c4f17 | 720 | error = suspend_nvs_alloc(); |
ad07277e | 721 | if (!error) { |
3f4b0ef7 | 722 | acpi_target_sleep_state = ACPI_STATE_S4; |
ad07277e RW |
723 | acpi_scan_lock_acquire(); |
724 | } | |
3f4b0ef7 RW |
725 | } |
726 | return error; | |
727 | } | |
728 | ||
d8f3de0d RW |
729 | /* |
730 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
731 | * been requested. | |
732 | */ | |
073ef1f6 | 733 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
734 | .begin = acpi_hibernation_begin_old, |
735 | .end = acpi_pm_end, | |
c5f7a1bb | 736 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 737 | .prepare = acpi_pm_freeze, |
2a6b6976 | 738 | .finish = acpi_pm_finish, |
a3d25c27 | 739 | .enter = acpi_hibernation_enter, |
c7e0831d | 740 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
741 | .pre_restore = acpi_pm_freeze, |
742 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 743 | .recover = acpi_pm_finish, |
a3d25c27 | 744 | }; |
02040f0b RW |
745 | |
746 | static void acpi_sleep_hibernate_setup(void) | |
747 | { | |
a4e90bed | 748 | if (!acpi_sleep_state_supported(ACPI_STATE_S4)) |
02040f0b RW |
749 | return; |
750 | ||
751 | hibernation_set_ops(old_suspend_ordering ? | |
752 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
753 | sleep_states[ACPI_STATE_S4] = 1; | |
02040f0b RW |
754 | if (nosigcheck) |
755 | return; | |
756 | ||
757 | acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); | |
758 | if (facs) | |
759 | s4_hardware_signature = facs->hardware_signature; | |
760 | } | |
761 | #else /* !CONFIG_HIBERNATION */ | |
762 | static inline void acpi_sleep_hibernate_setup(void) {} | |
763 | #endif /* !CONFIG_HIBERNATION */ | |
a3d25c27 | 764 | |
296699de RW |
765 | int acpi_suspend(u32 acpi_state) |
766 | { | |
767 | suspend_state_t states[] = { | |
768 | [1] = PM_SUSPEND_STANDBY, | |
769 | [3] = PM_SUSPEND_MEM, | |
770 | [5] = PM_SUSPEND_MAX | |
771 | }; | |
772 | ||
773 | if (acpi_state < 6 && states[acpi_state]) | |
774 | return pm_suspend(states[acpi_state]); | |
775 | if (acpi_state == 4) | |
776 | return hibernate(); | |
777 | return -EINVAL; | |
778 | } | |
779 | ||
f216cc37 AS |
780 | static void acpi_power_off_prepare(void) |
781 | { | |
782 | /* Prepare to power off the system */ | |
783 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 784 | acpi_disable_all_gpes(); |
f216cc37 AS |
785 | } |
786 | ||
787 | static void acpi_power_off(void) | |
788 | { | |
789 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 790 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 791 | local_irq_disable(); |
3f6f49c7 | 792 | acpi_enter_sleep_state(ACPI_STATE_S5); |
96f15efc LB |
793 | } |
794 | ||
aafbcd16 | 795 | int __init acpi_sleep_init(void) |
1da177e4 | 796 | { |
ed4cf5b2 JP |
797 | char supported[ACPI_S_STATE_COUNT * 3 + 1]; |
798 | char *pos = supported; | |
799 | int i; | |
1da177e4 | 800 | |
0ac1b1d7 ZR |
801 | acpi_sleep_dmi_check(); |
802 | ||
5a50fe70 | 803 | sleep_states[ACPI_STATE_S0] = 1; |
5a50fe70 | 804 | |
02040f0b RW |
805 | acpi_sleep_suspend_setup(); |
806 | acpi_sleep_hibernate_setup(); | |
1da177e4 | 807 | |
a4e90bed | 808 | if (acpi_sleep_state_supported(ACPI_STATE_S5)) { |
f216cc37 | 809 | sleep_states[ACPI_STATE_S5] = 1; |
f216cc37 AS |
810 | pm_power_off_prepare = acpi_power_off_prepare; |
811 | pm_power_off = acpi_power_off; | |
812 | } | |
ed4cf5b2 JP |
813 | |
814 | supported[0] = 0; | |
815 | for (i = 0; i < ACPI_S_STATE_COUNT; i++) { | |
816 | if (sleep_states[i]) | |
817 | pos += sprintf(pos, " S%d", i); | |
818 | } | |
819 | pr_info(PREFIX "(supports%s)\n", supported); | |
820 | ||
e49f711c ZY |
821 | /* |
822 | * Register the tts_notifier to reboot notifier list so that the _TTS | |
823 | * object can also be evaluated when the system enters S5. | |
824 | */ | |
825 | register_reboot_notifier(&tts_notifier); | |
1da177e4 LT |
826 | return 0; |
827 | } |