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 | |
22 | #include <asm/io.h> | |
23 | ||
1da177e4 LT |
24 | #include <acpi/acpi_bus.h> |
25 | #include <acpi/acpi_drivers.h> | |
e60cc7a6 BH |
26 | |
27 | #include "internal.h" | |
1da177e4 LT |
28 | #include "sleep.h" |
29 | ||
01eac60b | 30 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
1da177e4 | 31 | |
e49f711c ZY |
32 | static void acpi_sleep_tts_switch(u32 acpi_state) |
33 | { | |
0db98202 | 34 | acpi_status status; |
e49f711c | 35 | |
0db98202 | 36 | status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state); |
e49f711c ZY |
37 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
38 | /* | |
39 | * OS can't evaluate the _TTS object correctly. Some warning | |
40 | * message will be printed. But it won't break anything. | |
41 | */ | |
42 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); | |
43 | } | |
44 | } | |
45 | ||
46 | static int tts_notify_reboot(struct notifier_block *this, | |
47 | unsigned long code, void *x) | |
48 | { | |
49 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
50 | return NOTIFY_DONE; | |
51 | } | |
52 | ||
53 | static struct notifier_block tts_notifier = { | |
54 | .notifier_call = tts_notify_reboot, | |
55 | .next = NULL, | |
56 | .priority = 0, | |
57 | }; | |
58 | ||
c9b6c8f6 | 59 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
60 | { |
61 | #ifdef CONFIG_ACPI_SLEEP | |
62 | /* do we have a wakeup address for S2 and S3? */ | |
63 | if (acpi_state == ACPI_STATE_S3) { | |
319b6ffc | 64 | if (!acpi_wakeup_address) |
2f3f2226 | 65 | return -EFAULT; |
319b6ffc | 66 | acpi_set_firmware_waking_vector(acpi_wakeup_address); |
2f3f2226 AS |
67 | |
68 | } | |
69 | ACPI_FLUSH_CPU_CACHE(); | |
2f3f2226 | 70 | #endif |
c9b6c8f6 RW |
71 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
72 | acpi_state); | |
78f5f023 | 73 | acpi_enable_wakeup_devices(acpi_state); |
2f3f2226 AS |
74 | acpi_enter_sleep_state_prep(acpi_state); |
75 | return 0; | |
76 | } | |
77 | ||
5d1e072b | 78 | #ifdef CONFIG_ACPI_SLEEP |
091aad6a | 79 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
a6ae7594 RW |
80 | |
81 | u32 acpi_target_system_state(void) | |
82 | { | |
83 | return acpi_target_sleep_state; | |
84 | } | |
85 | ||
a5ca7345 | 86 | static bool pwr_btn_event_pending; |
091aad6a | 87 | |
72ad5d77 RW |
88 | /* |
89 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
90 | * and to restore them during the subsequent resume. Windows does that also for | |
91 | * suspend to RAM. However, it is known that this mechanism does not work on | |
92 | * all machines, so we allow the user to disable it with the help of the | |
93 | * 'acpi_sleep=nonvs' kernel command line option. | |
94 | */ | |
95 | static bool nvs_nosave; | |
96 | ||
97 | void __init acpi_nvs_nosave(void) | |
98 | { | |
99 | nvs_nosave = true; | |
100 | } | |
101 | ||
1bad2f19 KCA |
102 | /* |
103 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
104 | * but says nothing about saving NVS during S3. Not all versions of Windows | |
105 | * save NVS on S3 suspend either, and it is clear that not all systems need | |
106 | * NVS to be saved at S3 time. To improve suspend/resume time, allow the | |
107 | * user to disable saving NVS on S3 if their system does not require it, but | |
108 | * continue to save/restore NVS for S4 as specified. | |
109 | */ | |
110 | static bool nvs_nosave_s3; | |
111 | ||
112 | void __init acpi_nvs_nosave_s3(void) | |
113 | { | |
114 | nvs_nosave_s3 = true; | |
115 | } | |
116 | ||
d8f3de0d RW |
117 | /* |
118 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
119 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
120 | * kernel command line option that causes the following variable to be set. | |
121 | */ | |
122 | static bool old_suspend_ordering; | |
123 | ||
124 | void __init acpi_old_suspend_ordering(void) | |
125 | { | |
126 | old_suspend_ordering = true; | |
127 | } | |
128 | ||
0ac1b1d7 ZR |
129 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
130 | { | |
131 | acpi_old_suspend_ordering(); | |
132 | return 0; | |
133 | } | |
134 | ||
135 | static int __init init_nvs_nosave(const struct dmi_system_id *d) | |
136 | { | |
137 | acpi_nvs_nosave(); | |
138 | return 0; | |
139 | } | |
140 | ||
3e4376ff | 141 | static struct dmi_system_id acpisleep_dmi_table[] __initdata = { |
0ac1b1d7 ZR |
142 | { |
143 | .callback = init_old_suspend_ordering, | |
144 | .ident = "Abit KN9 (nForce4 variant)", | |
145 | .matches = { | |
146 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
147 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
148 | }, | |
149 | }, | |
150 | { | |
151 | .callback = init_old_suspend_ordering, | |
152 | .ident = "HP xw4600 Workstation", | |
153 | .matches = { | |
154 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
155 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
156 | }, | |
157 | }, | |
158 | { | |
159 | .callback = init_old_suspend_ordering, | |
160 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
161 | .matches = { | |
162 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
163 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
164 | }, | |
165 | }, | |
166 | { | |
167 | .callback = init_old_suspend_ordering, | |
168 | .ident = "Panasonic CF51-2L", | |
169 | .matches = { | |
170 | DMI_MATCH(DMI_BOARD_VENDOR, | |
171 | "Matsushita Electric Industrial Co.,Ltd."), | |
172 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
173 | }, | |
174 | }, | |
175 | { | |
176 | .callback = init_nvs_nosave, | |
66f2fda9 JS |
177 | .ident = "Sony Vaio VGN-FW41E_H", |
178 | .matches = { | |
179 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
180 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"), | |
181 | }, | |
182 | }, | |
183 | { | |
184 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
185 | .ident = "Sony Vaio VGN-FW21E", |
186 | .matches = { | |
187 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
188 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
189 | }, | |
190 | }, | |
191 | { | |
192 | .callback = init_nvs_nosave, | |
469dd1c4 FV |
193 | .ident = "Sony Vaio VGN-FW21M", |
194 | .matches = { | |
195 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
196 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"), | |
197 | }, | |
198 | }, | |
199 | { | |
200 | .callback = init_nvs_nosave, | |
0ac1b1d7 ZR |
201 | .ident = "Sony Vaio VPCEB17FX", |
202 | .matches = { | |
203 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
204 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
205 | }, | |
206 | }, | |
207 | { | |
208 | .callback = init_nvs_nosave, | |
209 | .ident = "Sony Vaio VGN-SR11M", | |
210 | .matches = { | |
211 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
212 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
213 | }, | |
214 | }, | |
215 | { | |
216 | .callback = init_nvs_nosave, | |
217 | .ident = "Everex StepNote Series", | |
218 | .matches = { | |
219 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
220 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
221 | }, | |
222 | }, | |
223 | { | |
224 | .callback = init_nvs_nosave, | |
225 | .ident = "Sony Vaio VPCEB1Z1E", | |
226 | .matches = { | |
227 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
228 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
229 | }, | |
230 | }, | |
231 | { | |
232 | .callback = init_nvs_nosave, | |
233 | .ident = "Sony Vaio VGN-NW130D", | |
234 | .matches = { | |
235 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
236 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
237 | }, | |
238 | }, | |
239 | { | |
240 | .callback = init_nvs_nosave, | |
241 | .ident = "Sony Vaio VPCCW29FX", | |
242 | .matches = { | |
243 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
244 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
245 | }, | |
246 | }, | |
247 | { | |
248 | .callback = init_nvs_nosave, | |
249 | .ident = "Averatec AV1020-ED2", | |
250 | .matches = { | |
251 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
252 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
253 | }, | |
254 | }, | |
255 | { | |
256 | .callback = init_old_suspend_ordering, | |
257 | .ident = "Asus A8N-SLI DELUXE", | |
258 | .matches = { | |
259 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
260 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
261 | }, | |
262 | }, | |
263 | { | |
264 | .callback = init_old_suspend_ordering, | |
265 | .ident = "Asus A8N-SLI Premium", | |
266 | .matches = { | |
267 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
268 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
269 | }, | |
270 | }, | |
271 | { | |
272 | .callback = init_nvs_nosave, | |
273 | .ident = "Sony Vaio VGN-SR26GN_P", | |
274 | .matches = { | |
275 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
276 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
277 | }, | |
278 | }, | |
279 | { | |
280 | .callback = init_nvs_nosave, | |
281 | .ident = "Sony Vaio VPCEB1S1E", | |
282 | .matches = { | |
283 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
284 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), | |
285 | }, | |
286 | }, | |
287 | { | |
288 | .callback = init_nvs_nosave, | |
289 | .ident = "Sony Vaio VGN-FW520F", | |
290 | .matches = { | |
291 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
292 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
293 | }, | |
294 | }, | |
295 | { | |
296 | .callback = init_nvs_nosave, | |
297 | .ident = "Asus K54C", | |
298 | .matches = { | |
299 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
300 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
301 | }, | |
302 | }, | |
303 | { | |
304 | .callback = init_nvs_nosave, | |
305 | .ident = "Asus K54HR", | |
306 | .matches = { | |
307 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
308 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
309 | }, | |
310 | }, | |
311 | {}, | |
312 | }; | |
313 | ||
314 | static void acpi_sleep_dmi_check(void) | |
315 | { | |
316 | dmi_check_system(acpisleep_dmi_table); | |
317 | } | |
318 | ||
d8f3de0d | 319 | /** |
d5a64513 | 320 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 321 | */ |
d5a64513 | 322 | static int acpi_pm_freeze(void) |
d8f3de0d | 323 | { |
3d97e426 | 324 | acpi_disable_all_gpes(); |
bd6f10a5 | 325 | acpi_os_wait_events_complete(); |
fe955682 | 326 | acpi_ec_block_transactions(); |
d8f3de0d RW |
327 | return 0; |
328 | } | |
329 | ||
c5f7a1bb RW |
330 | /** |
331 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
332 | */ | |
333 | static int acpi_pm_pre_suspend(void) | |
334 | { | |
335 | acpi_pm_freeze(); | |
26fcaf60 | 336 | return suspend_nvs_save(); |
c5f7a1bb RW |
337 | } |
338 | ||
d8f3de0d RW |
339 | /** |
340 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
341 | * | |
342 | * If necessary, set the firmware waking vector and do arch-specific | |
343 | * nastiness to get the wakeup code to the waking vector. | |
344 | */ | |
345 | static int __acpi_pm_prepare(void) | |
346 | { | |
347 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
348 | if (error) |
349 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 350 | |
d8f3de0d RW |
351 | return error; |
352 | } | |
353 | ||
354 | /** | |
355 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
356 | * state and disable the GPEs. | |
357 | */ | |
358 | static int acpi_pm_prepare(void) | |
359 | { | |
360 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 361 | if (!error) |
26fcaf60 | 362 | error = acpi_pm_pre_suspend(); |
d5a64513 | 363 | |
d8f3de0d RW |
364 | return error; |
365 | } | |
366 | ||
c10d7a13 DD |
367 | static int find_powerf_dev(struct device *dev, void *data) |
368 | { | |
369 | struct acpi_device *device = to_acpi_device(dev); | |
370 | const char *hid = acpi_device_hid(device); | |
371 | ||
372 | return !strcmp(hid, ACPI_BUTTON_HID_POWERF); | |
373 | } | |
374 | ||
d8f3de0d RW |
375 | /** |
376 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
377 | * | |
378 | * This is called after we wake back up (or if entering the sleep state | |
379 | * failed). | |
380 | */ | |
381 | static void acpi_pm_finish(void) | |
382 | { | |
c10d7a13 | 383 | struct device *pwr_btn_dev; |
d8f3de0d RW |
384 | u32 acpi_state = acpi_target_sleep_state; |
385 | ||
42de5532 | 386 | acpi_ec_unblock_transactions(); |
d551d81d | 387 | suspend_nvs_free(); |
2a6b6976 | 388 | |
d8f3de0d RW |
389 | if (acpi_state == ACPI_STATE_S0) |
390 | return; | |
1da177e4 | 391 | |
d8f3de0d RW |
392 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
393 | acpi_state); | |
78f5f023 | 394 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
395 | acpi_leave_sleep_state(acpi_state); |
396 | ||
397 | /* reset firmware waking vector */ | |
398 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
399 | ||
400 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c10d7a13 | 401 | |
781d737c RW |
402 | acpi_resume_power_resources(); |
403 | ||
c10d7a13 DD |
404 | /* If we were woken with the fixed power button, provide a small |
405 | * hint to userspace in the form of a wakeup event on the fixed power | |
406 | * button device (if it can be found). | |
407 | * | |
408 | * We delay the event generation til now, as the PM layer requires | |
409 | * timekeeping to be running before we generate events. */ | |
410 | if (!pwr_btn_event_pending) | |
411 | return; | |
412 | ||
413 | pwr_btn_event_pending = false; | |
414 | pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, | |
415 | find_powerf_dev); | |
416 | if (pwr_btn_dev) { | |
417 | pm_wakeup_event(pwr_btn_dev, 0); | |
418 | put_device(pwr_btn_dev); | |
419 | } | |
d8f3de0d RW |
420 | } |
421 | ||
422 | /** | |
ad07277e RW |
423 | * acpi_pm_start - Start system PM transition. |
424 | */ | |
425 | static void acpi_pm_start(u32 acpi_state) | |
426 | { | |
427 | acpi_target_sleep_state = acpi_state; | |
428 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
429 | acpi_scan_lock_acquire(); | |
430 | } | |
431 | ||
432 | /** | |
433 | * acpi_pm_end - Finish up system PM transition. | |
d8f3de0d RW |
434 | */ |
435 | static void acpi_pm_end(void) | |
436 | { | |
ad07277e | 437 | acpi_scan_lock_release(); |
d8f3de0d RW |
438 | /* |
439 | * This is necessary in case acpi_pm_finish() is not called during a | |
440 | * failing transition to a sleep state. | |
441 | */ | |
442 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 443 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 444 | } |
92daa7b5 RW |
445 | #else /* !CONFIG_ACPI_SLEEP */ |
446 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
0ac1b1d7 | 447 | static inline void acpi_sleep_dmi_check(void) {} |
5d1e072b | 448 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 449 | |
d8f3de0d | 450 | #ifdef CONFIG_SUSPEND |
1da177e4 | 451 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
452 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
453 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
454 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 455 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
456 | }; |
457 | ||
e9b3aba8 | 458 | /** |
2c6e33c3 | 459 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
460 | * associated with given @pm_state, if supported. |
461 | */ | |
2c6e33c3 | 462 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
463 | { |
464 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
ad07277e | 465 | int error; |
e9b3aba8 | 466 | |
1bad2f19 | 467 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
468 | if (error) |
469 | return error; | |
470 | ||
ad07277e RW |
471 | if (!sleep_states[acpi_state]) { |
472 | pr_err("ACPI does not support sleep state S%u\n", acpi_state); | |
473 | return -ENOSYS; | |
e9b3aba8 | 474 | } |
ad07277e RW |
475 | |
476 | acpi_pm_start(acpi_state); | |
477 | return 0; | |
e9b3aba8 RW |
478 | } |
479 | ||
1da177e4 | 480 | /** |
2c6e33c3 | 481 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 482 | * @pm_state: ignored |
1da177e4 | 483 | * |
50ad147a RW |
484 | * Flush caches and go to sleep. For STR we have to call arch-specific |
485 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
486 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
487 | */ | |
2c6e33c3 | 488 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
489 | { |
490 | acpi_status status = AE_OK; | |
e9b3aba8 | 491 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 492 | int error; |
1da177e4 LT |
493 | |
494 | ACPI_FLUSH_CPU_CACHE(); | |
495 | ||
e9b3aba8 RW |
496 | switch (acpi_state) { |
497 | case ACPI_STATE_S1: | |
1da177e4 | 498 | barrier(); |
3f6f49c7 | 499 | status = acpi_enter_sleep_state(acpi_state); |
1da177e4 LT |
500 | break; |
501 | ||
e9b3aba8 | 502 | case ACPI_STATE_S3: |
d6a77ead KRW |
503 | if (!acpi_suspend_lowlevel) |
504 | return -ENOSYS; | |
f1a2003e | 505 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
506 | if (error) |
507 | return error; | |
7a63f08b | 508 | pr_info(PREFIX "Low-level resume complete\n"); |
1da177e4 | 509 | break; |
1da177e4 | 510 | } |
872d83d0 | 511 | |
b6dacf63 MG |
512 | /* This violates the spec but is required for bug compatibility. */ |
513 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 514 | |
3f6f49c7 LB |
515 | /* Reprogram control registers */ |
516 | acpi_leave_sleep_state_prep(acpi_state); | |
c95d47a8 | 517 | |
23b168d4 | 518 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
519 | * of the OSPM to clear the status bit [ implying that the |
520 | * POWER_BUTTON event should not reach userspace ] | |
c10d7a13 DD |
521 | * |
522 | * However, we do generate a small hint for userspace in the form of | |
523 | * a wakeup event. We flag this condition for now and generate the | |
524 | * event later, as we're currently too early in resume to be able to | |
525 | * generate wakeup events. | |
872d83d0 | 526 | */ |
c10d7a13 DD |
527 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
528 | acpi_event_status pwr_btn_status; | |
529 | ||
530 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); | |
531 | ||
532 | if (pwr_btn_status & ACPI_EVENT_FLAG_SET) { | |
533 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
534 | /* Flag for later */ | |
535 | pwr_btn_event_pending = true; | |
536 | } | |
537 | } | |
872d83d0 | 538 | |
a3627f67 SL |
539 | /* |
540 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
541 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
542 | * acpi_leave_sleep_state will reenable specific GPEs later | |
543 | */ | |
3d97e426 | 544 | acpi_disable_all_gpes(); |
d5a64513 | 545 | /* Allow EC transactions to happen. */ |
fe955682 | 546 | acpi_ec_unblock_transactions_early(); |
a3627f67 | 547 | |
2a6b6976 MG |
548 | suspend_nvs_restore(); |
549 | ||
1da177e4 LT |
550 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
551 | } | |
552 | ||
2c6e33c3 | 553 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 554 | { |
e8c9c502 | 555 | u32 acpi_state; |
eb9289eb | 556 | |
e8c9c502 JB |
557 | switch (pm_state) { |
558 | case PM_SUSPEND_ON: | |
559 | case PM_SUSPEND_STANDBY: | |
560 | case PM_SUSPEND_MEM: | |
561 | acpi_state = acpi_suspend_states[pm_state]; | |
562 | ||
563 | return sleep_states[acpi_state]; | |
564 | default: | |
565 | return 0; | |
566 | } | |
eb9289eb SL |
567 | } |
568 | ||
2f55ac07 | 569 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
570 | .valid = acpi_suspend_state_valid, |
571 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 572 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 573 | .enter = acpi_suspend_enter, |
618d7fd0 | 574 | .wake = acpi_pm_finish, |
d8f3de0d RW |
575 | .end = acpi_pm_end, |
576 | }; | |
577 | ||
578 | /** | |
579 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
580 | * state associated with given @pm_state, if supported, and | |
581 | * execute the _PTS control method. This function is used if the | |
582 | * pre-ACPI 2.0 suspend ordering has been requested. | |
583 | */ | |
584 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
585 | { | |
586 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
587 | if (!error) |
588 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 589 | |
d8f3de0d RW |
590 | return error; |
591 | } | |
592 | ||
593 | /* | |
594 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
595 | * been requested. | |
596 | */ | |
2f55ac07 | 597 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
598 | .valid = acpi_suspend_state_valid, |
599 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 600 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 601 | .enter = acpi_suspend_enter, |
618d7fd0 | 602 | .wake = acpi_pm_finish, |
d8f3de0d RW |
603 | .end = acpi_pm_end, |
604 | .recover = acpi_pm_finish, | |
1da177e4 | 605 | }; |
02040f0b RW |
606 | |
607 | static void acpi_sleep_suspend_setup(void) | |
608 | { | |
609 | int i; | |
610 | ||
611 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { | |
612 | acpi_status status; | |
613 | u8 type_a, type_b; | |
614 | ||
615 | status = acpi_get_sleep_type_data(i, &type_a, &type_b); | |
616 | if (ACPI_SUCCESS(status)) { | |
617 | sleep_states[i] = 1; | |
02040f0b RW |
618 | } |
619 | } | |
620 | ||
621 | suspend_set_ops(old_suspend_ordering ? | |
622 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
623 | } | |
624 | #else /* !CONFIG_SUSPEND */ | |
625 | static inline void acpi_sleep_suspend_setup(void) {} | |
626 | #endif /* !CONFIG_SUSPEND */ | |
296699de | 627 | |
b0cb1a19 | 628 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
629 | static unsigned long s4_hardware_signature; |
630 | static struct acpi_table_facs *facs; | |
631 | static bool nosigcheck; | |
632 | ||
633 | void __init acpi_no_s4_hw_signature(void) | |
634 | { | |
635 | nosigcheck = true; | |
636 | } | |
637 | ||
caea99ef | 638 | static int acpi_hibernation_begin(void) |
74f270af | 639 | { |
3f4b0ef7 RW |
640 | int error; |
641 | ||
72ad5d77 | 642 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
ad07277e RW |
643 | if (!error) |
644 | acpi_pm_start(ACPI_STATE_S4); | |
3f4b0ef7 RW |
645 | |
646 | return error; | |
647 | } | |
648 | ||
a3d25c27 RW |
649 | static int acpi_hibernation_enter(void) |
650 | { | |
651 | acpi_status status = AE_OK; | |
a3d25c27 RW |
652 | |
653 | ACPI_FLUSH_CPU_CACHE(); | |
654 | ||
a3d25c27 | 655 | /* This shouldn't return. If it returns, we have a problem */ |
3f6f49c7 LB |
656 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
657 | /* Reprogram control registers */ | |
658 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
659 | |
660 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
661 | } | |
662 | ||
c7e0831d RW |
663 | static void acpi_hibernation_leave(void) |
664 | { | |
665 | /* | |
666 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
667 | * enable it here. | |
668 | */ | |
669 | acpi_enable(); | |
3f6f49c7 LB |
670 | /* Reprogram control registers */ |
671 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c SL |
672 | /* Check the hardware signature */ |
673 | if (facs && s4_hardware_signature != facs->hardware_signature) { | |
674 | printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " | |
675 | "cannot resume!\n"); | |
676 | panic("ACPI S4 hardware signature mismatch"); | |
677 | } | |
3f4b0ef7 | 678 | /* Restore the NVS memory area */ |
dd4c4f17 | 679 | suspend_nvs_restore(); |
d5a64513 | 680 | /* Allow EC transactions to happen. */ |
fe955682 | 681 | acpi_ec_unblock_transactions_early(); |
c7e0831d RW |
682 | } |
683 | ||
d5a64513 | 684 | static void acpi_pm_thaw(void) |
f6bb13aa | 685 | { |
fe955682 | 686 | acpi_ec_unblock_transactions(); |
3d97e426 | 687 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
688 | } |
689 | ||
073ef1f6 | 690 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
691 | .begin = acpi_hibernation_begin, |
692 | .end = acpi_pm_end, | |
c5f7a1bb | 693 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 694 | .finish = acpi_pm_finish, |
d8f3de0d RW |
695 | .prepare = acpi_pm_prepare, |
696 | .enter = acpi_hibernation_enter, | |
697 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
698 | .pre_restore = acpi_pm_freeze, |
699 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 700 | }; |
caea99ef | 701 | |
d8f3de0d RW |
702 | /** |
703 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
704 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
705 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
706 | * requested. | |
707 | */ | |
708 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 709 | { |
e49f711c ZY |
710 | int error; |
711 | /* | |
712 | * The _TTS object should always be evaluated before the _PTS object. | |
713 | * When the old_suspended_ordering is true, the _PTS object is | |
714 | * evaluated in the acpi_sleep_prepare. | |
715 | */ | |
716 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
717 | ||
718 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 719 | |
3f4b0ef7 | 720 | if (!error) { |
72ad5d77 | 721 | if (!nvs_nosave) |
dd4c4f17 | 722 | error = suspend_nvs_alloc(); |
ad07277e | 723 | if (!error) { |
3f4b0ef7 | 724 | acpi_target_sleep_state = ACPI_STATE_S4; |
ad07277e RW |
725 | acpi_scan_lock_acquire(); |
726 | } | |
3f4b0ef7 RW |
727 | } |
728 | return error; | |
729 | } | |
730 | ||
d8f3de0d RW |
731 | /* |
732 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
733 | * been requested. | |
734 | */ | |
073ef1f6 | 735 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
736 | .begin = acpi_hibernation_begin_old, |
737 | .end = acpi_pm_end, | |
c5f7a1bb | 738 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 739 | .prepare = acpi_pm_freeze, |
2a6b6976 | 740 | .finish = acpi_pm_finish, |
a3d25c27 | 741 | .enter = acpi_hibernation_enter, |
c7e0831d | 742 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
743 | .pre_restore = acpi_pm_freeze, |
744 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 745 | .recover = acpi_pm_finish, |
a3d25c27 | 746 | }; |
02040f0b RW |
747 | |
748 | static void acpi_sleep_hibernate_setup(void) | |
749 | { | |
750 | acpi_status status; | |
751 | u8 type_a, type_b; | |
752 | ||
753 | status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); | |
754 | if (ACPI_FAILURE(status)) | |
755 | return; | |
756 | ||
757 | hibernation_set_ops(old_suspend_ordering ? | |
758 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
759 | sleep_states[ACPI_STATE_S4] = 1; | |
02040f0b RW |
760 | if (nosigcheck) |
761 | return; | |
762 | ||
763 | acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); | |
764 | if (facs) | |
765 | s4_hardware_signature = facs->hardware_signature; | |
766 | } | |
767 | #else /* !CONFIG_HIBERNATION */ | |
768 | static inline void acpi_sleep_hibernate_setup(void) {} | |
769 | #endif /* !CONFIG_HIBERNATION */ | |
a3d25c27 | 770 | |
296699de RW |
771 | int acpi_suspend(u32 acpi_state) |
772 | { | |
773 | suspend_state_t states[] = { | |
774 | [1] = PM_SUSPEND_STANDBY, | |
775 | [3] = PM_SUSPEND_MEM, | |
776 | [5] = PM_SUSPEND_MAX | |
777 | }; | |
778 | ||
779 | if (acpi_state < 6 && states[acpi_state]) | |
780 | return pm_suspend(states[acpi_state]); | |
781 | if (acpi_state == 4) | |
782 | return hibernate(); | |
783 | return -EINVAL; | |
784 | } | |
785 | ||
f216cc37 AS |
786 | static void acpi_power_off_prepare(void) |
787 | { | |
788 | /* Prepare to power off the system */ | |
789 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 790 | acpi_disable_all_gpes(); |
f216cc37 AS |
791 | } |
792 | ||
793 | static void acpi_power_off(void) | |
794 | { | |
795 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 796 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 797 | local_irq_disable(); |
3f6f49c7 | 798 | acpi_enter_sleep_state(ACPI_STATE_S5); |
96f15efc LB |
799 | } |
800 | ||
aafbcd16 | 801 | int __init acpi_sleep_init(void) |
1da177e4 | 802 | { |
296699de RW |
803 | acpi_status status; |
804 | u8 type_a, type_b; | |
ed4cf5b2 JP |
805 | char supported[ACPI_S_STATE_COUNT * 3 + 1]; |
806 | char *pos = supported; | |
807 | int i; | |
1da177e4 LT |
808 | |
809 | if (acpi_disabled) | |
810 | return 0; | |
811 | ||
0ac1b1d7 ZR |
812 | acpi_sleep_dmi_check(); |
813 | ||
5a50fe70 | 814 | sleep_states[ACPI_STATE_S0] = 1; |
5a50fe70 | 815 | |
02040f0b RW |
816 | acpi_sleep_suspend_setup(); |
817 | acpi_sleep_hibernate_setup(); | |
1da177e4 | 818 | |
f216cc37 AS |
819 | status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
820 | if (ACPI_SUCCESS(status)) { | |
821 | sleep_states[ACPI_STATE_S5] = 1; | |
f216cc37 AS |
822 | pm_power_off_prepare = acpi_power_off_prepare; |
823 | pm_power_off = acpi_power_off; | |
824 | } | |
ed4cf5b2 JP |
825 | |
826 | supported[0] = 0; | |
827 | for (i = 0; i < ACPI_S_STATE_COUNT; i++) { | |
828 | if (sleep_states[i]) | |
829 | pos += sprintf(pos, " S%d", i); | |
830 | } | |
831 | pr_info(PREFIX "(supports%s)\n", supported); | |
832 | ||
e49f711c ZY |
833 | /* |
834 | * Register the tts_notifier to reboot notifier list so that the _TTS | |
835 | * object can also be evaluated when the system enters S5. | |
836 | */ | |
837 | register_reboot_notifier(&tts_notifier); | |
1da177e4 LT |
838 | return 0; |
839 | } |