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