blob: 6c949602cbd111d18753217ea0ee4784054ec008 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * sleep.c - ACPI sleep support.
3 *
Alexey Starikovskiye2a5b422005-03-18 16:20:46 -05004 * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * 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>
Zhao Yakuie49f7112008-08-12 10:20:22 +080018#include <linux/reboot.h>
H. Peter Anvind1ee4332011-02-14 15:42:46 -080019#include <linux/acpi.h>
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +040020
21#include <asm/io.h>
22
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <acpi/acpi_bus.h>
24#include <acpi/acpi_drivers.h>
Bjorn Helgaase60cc7a2009-03-13 12:08:26 -060025
26#include "internal.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "sleep.h"
28
Stephen Hemminger01eac602010-10-18 18:47:25 -070029static u8 sleep_states[ACPI_S_STATE_COUNT];
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
Zhao Yakuie49f7112008-08-12 10:20:22 +080031static 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
48static 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
55static struct notifier_block tts_notifier = {
56 .notifier_call = tts_notify_reboot,
57 .next = NULL,
58 .priority = 0,
59};
60
Rafael J. Wysockic9b6c8f2008-01-08 00:10:57 +010061static int acpi_sleep_prepare(u32 acpi_state)
Alexey Starikovskiy2f3f22262007-09-24 14:33:21 +020062{
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 }
H. Peter Anvin4b4f7282008-06-24 23:03:48 +020069 acpi_set_firmware_waking_vector(
70 (acpi_physical_address)acpi_wakeup_address);
Alexey Starikovskiy2f3f22262007-09-24 14:33:21 +020071
72 }
73 ACPI_FLUSH_CPU_CACHE();
Alexey Starikovskiy2f3f22262007-09-24 14:33:21 +020074#endif
Rafael J. Wysockic9b6c8f2008-01-08 00:10:57 +010075 printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
76 acpi_state);
Rafael J. Wysocki78f5f022010-07-06 22:09:38 -040077 acpi_enable_wakeup_devices(acpi_state);
Alexey Starikovskiy2f3f22262007-09-24 14:33:21 +020078 acpi_enter_sleep_state_prep(acpi_state);
79 return 0;
80}
81
Rafael J. Wysocki5d1e0722008-10-22 14:58:43 -040082#ifdef CONFIG_ACPI_SLEEP
Jan Beulich091aad62010-12-07 14:52:25 +000083static u32 acpi_target_sleep_state = ACPI_STATE_S0;
84
Zhang Ruid7f0eea2009-12-30 15:36:42 +080085/*
Rafael J. Wysocki72ad5d72010-07-23 22:59:09 +020086 * 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 */
92static bool nvs_nosave;
93
94void __init acpi_nvs_nosave(void)
95{
96 nvs_nosave = true;
97}
98
99/*
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200100 * 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 */
104static bool old_suspend_ordering;
105
106void __init acpi_old_suspend_ordering(void)
107{
108 old_suspend_ordering = true;
109}
110
111/**
Rafael J. Wysockid5a64512010-04-09 01:39:40 +0200112 * acpi_pm_freeze - Disable the GPEs and suspend EC transactions.
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200113 */
Rafael J. Wysockid5a64512010-04-09 01:39:40 +0200114static int acpi_pm_freeze(void)
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200115{
Lin Ming3d97e422008-12-16 16:57:46 +0800116 acpi_disable_all_gpes();
Rafael J. Wysockid5a64512010-04-09 01:39:40 +0200117 acpi_os_wait_events_complete(NULL);
Rafael J. Wysockife955682010-04-09 01:40:38 +0200118 acpi_ec_block_transactions();
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200119 return 0;
120}
121
122/**
Rafael J. Wysockic5f7a1b2010-07-02 00:14:09 +0200123 * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS.
124 */
125static int acpi_pm_pre_suspend(void)
126{
127 acpi_pm_freeze();
Jiri Slaby26fcaf62011-01-07 01:42:31 +0100128 return suspend_nvs_save();
Rafael J. Wysockic5f7a1b2010-07-02 00:14:09 +0200129}
130
131/**
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200132 * __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 */
137static int __acpi_pm_prepare(void)
138{
139 int error = acpi_sleep_prepare(acpi_target_sleep_state);
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200140 if (error)
141 acpi_target_sleep_state = ACPI_STATE_S0;
Rafael J. Wysockic5f7a1b2010-07-02 00:14:09 +0200142
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200143 return error;
144}
145
146/**
147 * acpi_pm_prepare - Prepare the platform to enter the target sleep
148 * state and disable the GPEs.
149 */
150static int acpi_pm_prepare(void)
151{
152 int error = __acpi_pm_prepare();
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200153 if (!error)
Jiri Slaby26fcaf62011-01-07 01:42:31 +0100154 error = acpi_pm_pre_suspend();
Rafael J. Wysockid5a64512010-04-09 01:39:40 +0200155
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200156 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 */
165static void acpi_pm_finish(void)
166{
167 u32 acpi_state = acpi_target_sleep_state;
168
Len Brown42de5532010-06-12 01:15:40 -0400169 acpi_ec_unblock_transactions();
Rafael J. Wysockid551d812011-01-19 22:27:55 +0100170 suspend_nvs_free();
Matthew Garrett2a6b6972010-05-28 16:32:15 -0400171
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200172 if (acpi_state == ACPI_STATE_S0)
173 return;
174
175 printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n",
176 acpi_state);
Rafael J. Wysocki78f5f022010-07-06 22:09:38 -0400177 acpi_disable_wakeup_devices(acpi_state);
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200178 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 */
189static 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;
Zhao Yakuie49f7112008-08-12 10:20:22 +0800196 acpi_sleep_tts_switch(acpi_target_sleep_state);
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200197}
Rafael J. Wysocki92daa7b2008-10-23 21:46:43 +0200198#else /* !CONFIG_ACPI_SLEEP */
199#define acpi_target_sleep_state ACPI_STATE_S0
Rafael J. Wysocki5d1e0722008-10-22 14:58:43 -0400200#endif /* CONFIG_ACPI_SLEEP */
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200201
202#ifdef CONFIG_SUSPEND
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203static u32 acpi_suspend_states[] = {
Alexey Starikovskiye2a5b422005-03-18 16:20:46 -0500204 [PM_SUSPEND_ON] = ACPI_STATE_S0,
205 [PM_SUSPEND_STANDBY] = ACPI_STATE_S1,
206 [PM_SUSPEND_MEM] = ACPI_STATE_S3,
Alexey Starikovskiye2a5b422005-03-18 16:20:46 -0500207 [PM_SUSPEND_MAX] = ACPI_STATE_S5
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208};
209
Rafael J. Wysockie9b3aba2007-07-17 22:40:06 +0200210/**
Len Brown2c6e33c2008-04-23 18:02:52 -0400211 * acpi_suspend_begin - Set the target system sleep state to the state
Rafael J. Wysockie9b3aba2007-07-17 22:40:06 +0200212 * associated with given @pm_state, if supported.
213 */
Len Brown2c6e33c2008-04-23 18:02:52 -0400214static int acpi_suspend_begin(suspend_state_t pm_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215{
216 u32 acpi_state = acpi_suspend_states[pm_state];
Rafael J. Wysockie9b3aba2007-07-17 22:40:06 +0200217 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
Rafael J. Wysocki72ad5d72010-07-23 22:59:09 +0200219 error = nvs_nosave ? 0 : suspend_nvs_alloc();
Matthew Garrett2a6b6972010-05-28 16:32:15 -0400220 if (error)
221 return error;
222
Rafael J. Wysockie9b3aba2007-07-17 22:40:06 +0200223 if (sleep_states[acpi_state]) {
224 acpi_target_sleep_state = acpi_state;
Zhao Yakuie49f7112008-08-12 10:20:22 +0800225 acpi_sleep_tts_switch(acpi_target_sleep_state);
Rafael J. Wysockie9b3aba2007-07-17 22:40:06 +0200226 } else {
227 printk(KERN_ERR "ACPI does not support this state: %d\n",
228 pm_state);
229 error = -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 }
Rafael J. Wysockie9b3aba2007-07-17 22:40:06 +0200231 return error;
232}
233
234/**
Len Brown2c6e33c2008-04-23 18:02:52 -0400235 * acpi_suspend_enter - Actually enter a sleep state.
Rafael J. Wysockie9b3aba2007-07-17 22:40:06 +0200236 * @pm_state: ignored
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 *
Rafael J. Wysocki50ad1472007-07-24 11:58:39 +0200238 * Flush caches and go to sleep. For STR we have to call arch-specific
239 * assembly, which in turn call acpi_enter_sleep_state().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 * It's unfortunate, but it works. Please fix if you're feeling frisky.
241 */
Len Brown2c6e33c2008-04-23 18:02:52 -0400242static int acpi_suspend_enter(suspend_state_t pm_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243{
244 acpi_status status = AE_OK;
Rafael J. Wysockie9b3aba2007-07-17 22:40:06 +0200245 u32 acpi_state = acpi_target_sleep_state;
Rafael J. Wysocki979f11b2011-02-08 23:42:09 +0100246 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
248 ACPI_FLUSH_CPU_CACHE();
249
Rafael J. Wysockie9b3aba2007-07-17 22:40:06 +0200250 switch (acpi_state) {
251 case ACPI_STATE_S1:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 barrier();
253 status = acpi_enter_sleep_state(acpi_state);
254 break;
255
Rafael J. Wysockie9b3aba2007-07-17 22:40:06 +0200256 case ACPI_STATE_S3:
Rafael J. Wysockif1a20032011-02-08 23:42:22 +0100257 error = acpi_suspend_lowlevel();
Rafael J. Wysocki979f11b2011-02-08 23:42:09 +0100258 if (error)
259 return error;
Rafael J. Wysocki7a63f082011-02-08 23:41:57 +0100260 pr_info(PREFIX "Low-level resume complete\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 }
Arnaud Patard872d83d2006-04-27 05:25:00 -0400263
Matthew Garrettb6dacf62010-05-11 13:49:25 -0400264 /* This violates the spec but is required for bug compatibility. */
265 acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
Rafael J. Wysocki65df7842008-11-26 17:53:13 -0500266
Rafael J. Wysockic95d47a2008-01-08 00:05:21 +0100267 /* Reprogram control registers and execute _BFS */
268 acpi_leave_sleep_state_prep(acpi_state);
269
Pavel Machek23b168d2008-02-05 19:27:12 +0100270 /* ACPI 3.0 specs (P62) says that it's the responsibility
Arnaud Patard872d83d2006-04-27 05:25:00 -0400271 * 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
Shaohua Lia3627f62007-06-20 09:17:58 +0800277 /*
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 */
Lin Ming3d97e422008-12-16 16:57:46 +0800282 acpi_disable_all_gpes();
Rafael J. Wysockid5a64512010-04-09 01:39:40 +0200283 /* Allow EC transactions to happen. */
Rafael J. Wysockife955682010-04-09 01:40:38 +0200284 acpi_ec_unblock_transactions_early();
Shaohua Lia3627f62007-06-20 09:17:58 +0800285
Matthew Garrett2a6b6972010-05-28 16:32:15 -0400286 suspend_nvs_restore();
287
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 return ACPI_SUCCESS(status) ? 0 : -EFAULT;
289}
290
Len Brown2c6e33c2008-04-23 18:02:52 -0400291static int acpi_suspend_state_valid(suspend_state_t pm_state)
Shaohua Lieb9289e2005-10-30 15:00:01 -0800292{
Johannes Berge8c9c502007-04-30 15:09:54 -0700293 u32 acpi_state;
Shaohua Lieb9289e2005-10-30 15:00:01 -0800294
Johannes Berge8c9c502007-04-30 15:09:54 -0700295 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 }
Shaohua Lieb9289e2005-10-30 15:00:01 -0800305}
306
Lionel Debroux2f55ac02010-11-16 14:14:02 +0100307static const struct platform_suspend_ops acpi_suspend_ops = {
Len Brown2c6e33c2008-04-23 18:02:52 -0400308 .valid = acpi_suspend_state_valid,
309 .begin = acpi_suspend_begin,
Rafael J. Wysocki6a7c7ea2009-04-19 20:08:42 +0200310 .prepare_late = acpi_pm_prepare,
Len Brown2c6e33c2008-04-23 18:02:52 -0400311 .enter = acpi_suspend_enter,
Rafael J. Wysocki618d7fd2010-07-02 00:14:57 +0200312 .wake = acpi_pm_finish,
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200313 .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 */
322static int acpi_suspend_begin_old(suspend_state_t pm_state)
323{
324 int error = acpi_suspend_begin(pm_state);
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200325 if (!error)
326 error = __acpi_pm_prepare();
Rafael J. Wysockic5f7a1b2010-07-02 00:14:09 +0200327
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200328 return error;
329}
330
331/*
332 * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
333 * been requested.
334 */
Lionel Debroux2f55ac02010-11-16 14:14:02 +0100335static const struct platform_suspend_ops acpi_suspend_ops_old = {
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200336 .valid = acpi_suspend_state_valid,
337 .begin = acpi_suspend_begin_old,
Rafael J. Wysockic5f7a1b2010-07-02 00:14:09 +0200338 .prepare_late = acpi_pm_pre_suspend,
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200339 .enter = acpi_suspend_enter,
Rafael J. Wysocki618d7fd2010-07-02 00:14:57 +0200340 .wake = acpi_pm_finish,
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200341 .end = acpi_pm_end,
342 .recover = acpi_pm_finish,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343};
Carlos Corbachoe41fb7c2008-07-23 21:28:43 -0700344
345static int __init init_old_suspend_ordering(const struct dmi_system_id *d)
346{
347 old_suspend_ordering = true;
348 return 0;
349}
350
Rafael J. Wysocki53998642010-09-24 16:46:14 -0400351static int __init init_nvs_nosave(const struct dmi_system_id *d)
352{
353 acpi_nvs_nosave();
354 return 0;
355}
356
Carlos Corbachoe41fb7c2008-07-23 21:28:43 -0700357static 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 },
Rafael J. Wysocki4fb507b2008-10-14 22:54:06 +0200366 {
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 },
Rafael J. Wysocki65df7842008-11-26 17:53:13 -0500374 {
Andy Whitcrofta1404492009-02-11 18:11:22 +0000375 .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 },
Zhang Rui45e77982009-03-15 22:13:44 -0400382 {
Zhao Yakui2a9ef8e2009-03-18 16:36:25 +0800383 .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 },
Rafael J. Wysocki53998642010-09-24 16:46:14 -0400391 {
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 },
Rafael J. Wysockiaf489312010-10-17 21:01:21 +0200407 {
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 },
Rafael J. Wysocki291a73c2010-12-12 21:10:42 +0100415 {
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 },
Rafael J. Wysocki7b330702011-01-06 23:37:01 +0100423 {
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 },
Carlos Corbachoe41fb7c2008-07-23 21:28:43 -0700431 {},
432};
Rafael J. Wysocki296699d2007-07-29 23:27:18 +0200433#endif /* CONFIG_SUSPEND */
434
Rafael J. Wysockib0cb1a12007-07-29 23:24:36 +0200435#ifdef CONFIG_HIBERNATION
Shaohua Libdfe6b72008-07-23 21:28:41 -0700436static unsigned long s4_hardware_signature;
437static struct acpi_table_facs *facs;
438static bool nosigcheck;
439
440void __init acpi_no_s4_hw_signature(void)
441{
442 nosigcheck = true;
443}
444
Rafael J. Wysockicaea99e2008-01-08 00:08:44 +0100445static int acpi_hibernation_begin(void)
Rafael J. Wysocki74f270a2007-10-18 03:04:42 -0700446{
Rafael J. Wysocki3f4b0ef2008-10-26 20:52:15 +0100447 int error;
448
Rafael J. Wysocki72ad5d72010-07-23 22:59:09 +0200449 error = nvs_nosave ? 0 : suspend_nvs_alloc();
Rafael J. Wysocki3f4b0ef2008-10-26 20:52:15 +0100450 if (!error) {
451 acpi_target_sleep_state = ACPI_STATE_S4;
452 acpi_sleep_tts_switch(acpi_target_sleep_state);
453 }
454
455 return error;
456}
457
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -0700458static int acpi_hibernation_enter(void)
459{
460 acpi_status status = AE_OK;
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -0700461
462 ACPI_FLUSH_CPU_CACHE();
463
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -0700464 /* This shouldn't return. If it returns, we have a problem */
465 status = acpi_enter_sleep_state(ACPI_STATE_S4);
Rafael J. Wysockic95d47a2008-01-08 00:05:21 +0100466 /* Reprogram control registers and execute _BFS */
467 acpi_leave_sleep_state_prep(ACPI_STATE_S4);
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -0700468
469 return ACPI_SUCCESS(status) ? 0 : -EFAULT;
470}
471
Rafael J. Wysockic7e08312007-10-18 03:04:55 -0700472static void acpi_hibernation_leave(void)
473{
474 /*
475 * If ACPI is not enabled by the BIOS and the boot kernel, we need to
476 * enable it here.
477 */
478 acpi_enable();
Rafael J. Wysockic95d47a2008-01-08 00:05:21 +0100479 /* Reprogram control registers and execute _BFS */
480 acpi_leave_sleep_state_prep(ACPI_STATE_S4);
Shaohua Libdfe6b72008-07-23 21:28:41 -0700481 /* Check the hardware signature */
482 if (facs && s4_hardware_signature != facs->hardware_signature) {
483 printk(KERN_EMERG "ACPI: Hardware changed while hibernated, "
484 "cannot resume!\n");
485 panic("ACPI S4 hardware signature mismatch");
486 }
Rafael J. Wysocki3f4b0ef2008-10-26 20:52:15 +0100487 /* Restore the NVS memory area */
Matthew Garrettdd4c4f12010-05-28 16:32:14 -0400488 suspend_nvs_restore();
Rafael J. Wysockid5a64512010-04-09 01:39:40 +0200489 /* Allow EC transactions to happen. */
Rafael J. Wysockife955682010-04-09 01:40:38 +0200490 acpi_ec_unblock_transactions_early();
Rafael J. Wysockic7e08312007-10-18 03:04:55 -0700491}
492
Rafael J. Wysockid5a64512010-04-09 01:39:40 +0200493static void acpi_pm_thaw(void)
Rafael J. Wysockif6bb13a2010-03-04 01:52:58 +0100494{
Rafael J. Wysockife955682010-04-09 01:40:38 +0200495 acpi_ec_unblock_transactions();
Lin Ming3d97e422008-12-16 16:57:46 +0800496 acpi_enable_all_runtime_gpes();
Rafael J. Wysockia634cc12007-07-19 01:47:30 -0700497}
498
Lionel Debroux073ef1f2010-11-09 21:48:49 +0100499static const struct platform_hibernation_ops acpi_hibernation_ops = {
Rafael J. Wysockicaea99e2008-01-08 00:08:44 +0100500 .begin = acpi_hibernation_begin,
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200501 .end = acpi_pm_end,
Rafael J. Wysockic5f7a1b2010-07-02 00:14:09 +0200502 .pre_snapshot = acpi_pm_prepare,
Matthew Garrett2a6b6972010-05-28 16:32:15 -0400503 .finish = acpi_pm_finish,
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200504 .prepare = acpi_pm_prepare,
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -0700505 .enter = acpi_hibernation_enter,
Rafael J. Wysockic7e08312007-10-18 03:04:55 -0700506 .leave = acpi_hibernation_leave,
Rafael J. Wysockid5a64512010-04-09 01:39:40 +0200507 .pre_restore = acpi_pm_freeze,
508 .restore_cleanup = acpi_pm_thaw,
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -0700509};
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200510
511/**
512 * acpi_hibernation_begin_old - Set the target system sleep state to
513 * ACPI_STATE_S4 and execute the _PTS control method. This
514 * function is used if the pre-ACPI 2.0 suspend ordering has been
515 * requested.
516 */
517static int acpi_hibernation_begin_old(void)
518{
Zhao Yakuie49f7112008-08-12 10:20:22 +0800519 int error;
520 /*
521 * The _TTS object should always be evaluated before the _PTS object.
522 * When the old_suspended_ordering is true, the _PTS object is
523 * evaluated in the acpi_sleep_prepare.
524 */
525 acpi_sleep_tts_switch(ACPI_STATE_S4);
526
527 error = acpi_sleep_prepare(ACPI_STATE_S4);
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200528
Rafael J. Wysocki3f4b0ef2008-10-26 20:52:15 +0100529 if (!error) {
Rafael J. Wysocki72ad5d72010-07-23 22:59:09 +0200530 if (!nvs_nosave)
Matthew Garrettdd4c4f12010-05-28 16:32:14 -0400531 error = suspend_nvs_alloc();
Rafael J. Wysocki3f4b0ef2008-10-26 20:52:15 +0100532 if (!error)
533 acpi_target_sleep_state = ACPI_STATE_S4;
534 }
535 return error;
536}
537
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200538/*
539 * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
540 * been requested.
541 */
Lionel Debroux073ef1f2010-11-09 21:48:49 +0100542static const struct platform_hibernation_ops acpi_hibernation_ops_old = {
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200543 .begin = acpi_hibernation_begin_old,
544 .end = acpi_pm_end,
Rafael J. Wysockic5f7a1b2010-07-02 00:14:09 +0200545 .pre_snapshot = acpi_pm_pre_suspend,
Rafael J. Wysockid5a64512010-04-09 01:39:40 +0200546 .prepare = acpi_pm_freeze,
Matthew Garrett2a6b6972010-05-28 16:32:15 -0400547 .finish = acpi_pm_finish,
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200548 .enter = acpi_hibernation_enter,
549 .leave = acpi_hibernation_leave,
Rafael J. Wysockid5a64512010-04-09 01:39:40 +0200550 .pre_restore = acpi_pm_freeze,
551 .restore_cleanup = acpi_pm_thaw,
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200552 .recover = acpi_pm_finish,
553};
554#endif /* CONFIG_HIBERNATION */
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -0700555
Rafael J. Wysocki296699d2007-07-29 23:27:18 +0200556int acpi_suspend(u32 acpi_state)
557{
558 suspend_state_t states[] = {
559 [1] = PM_SUSPEND_STANDBY,
560 [3] = PM_SUSPEND_MEM,
561 [5] = PM_SUSPEND_MAX
562 };
563
564 if (acpi_state < 6 && states[acpi_state])
565 return pm_suspend(states[acpi_state]);
566 if (acpi_state == 4)
567 return hibernate();
568 return -EINVAL;
569}
570
Rafael J. Wysockiaa338602011-02-11 00:06:54 +0100571#ifdef CONFIG_PM
Shaohua Lifd4aff12007-07-17 22:40:25 +0200572/**
573 * acpi_pm_device_sleep_state - return preferred power state of ACPI device
574 * in the system sleep state given by %acpi_target_sleep_state
David Brownell2fe2de52008-06-05 01:15:40 +0200575 * @dev: device to examine; its driver model wakeup flags control
576 * whether it should be able to wake up the system
Shaohua Lifd4aff12007-07-17 22:40:25 +0200577 * @d_min_p: used to store the upper limit of allowed states range
578 * Return value: preferred power state of the device on success, -ENODEV on
579 * failure (ie. if there's no 'struct acpi_device' for @dev)
580 *
581 * Find the lowest power (highest number) ACPI device power state that
582 * device @dev can be in while the system is in the sleep state represented
583 * by %acpi_target_sleep_state. If @wake is nonzero, the device should be
584 * able to wake up the system from this sleep state. If @d_min_p is set,
585 * the highest power (lowest number) device power state of @dev allowed
586 * in this system sleep state is stored at the location pointed to by it.
587 *
588 * The caller must ensure that @dev is valid before using this function.
589 * The caller is also responsible for figuring out if the device is
590 * supposed to be able to wake up the system and passing this information
591 * via @wake.
592 */
593
David Brownell2fe2de52008-06-05 01:15:40 +0200594int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p)
Shaohua Lifd4aff12007-07-17 22:40:25 +0200595{
596 acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
597 struct acpi_device *adev;
598 char acpi_method[] = "_SxD";
Matthew Wilcox27663c52008-10-10 02:22:59 -0400599 unsigned long long d_min, d_max;
Shaohua Lifd4aff12007-07-17 22:40:25 +0200600
601 if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
Shaohua Liead77592007-08-23 15:01:13 +0800602 printk(KERN_DEBUG "ACPI handle has no context!\n");
Shaohua Lifd4aff12007-07-17 22:40:25 +0200603 return -ENODEV;
604 }
605
606 acpi_method[2] = '0' + acpi_target_sleep_state;
607 /*
608 * If the sleep state is S0, we will return D3, but if the device has
609 * _S0W, we will use the value from _S0W
610 */
611 d_min = ACPI_STATE_D0;
612 d_max = ACPI_STATE_D3;
613
614 /*
615 * If present, _SxD methods return the minimum D-state (highest power
616 * state) we can use for the corresponding S-states. Otherwise, the
617 * minimum D-state is D0 (ACPI 3.x).
618 *
619 * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer
620 * provided -- that's our fault recovery, we ignore retval.
621 */
622 if (acpi_target_sleep_state > ACPI_STATE_S0)
623 acpi_evaluate_integer(handle, acpi_method, NULL, &d_min);
624
625 /*
626 * If _PRW says we can wake up the system from the target sleep state,
627 * the D-state returned by _SxD is sufficient for that (we assume a
628 * wakeup-aware driver if wake is set). Still, if _SxW exists
629 * (ACPI 3.x), it should return the maximum (lowest power) D-state that
630 * can wake the system. _S0W may be valid, too.
631 */
632 if (acpi_target_sleep_state == ACPI_STATE_S0 ||
Rafael J. Wysocki761afb82010-10-14 23:24:13 +0200633 (device_may_wakeup(dev) &&
Shaohua Lifd4aff12007-07-17 22:40:25 +0200634 adev->wakeup.sleep_state <= acpi_target_sleep_state)) {
Rafael J. Wysockiad3399c2008-01-11 00:10:38 +0100635 acpi_status status;
636
Shaohua Lifd4aff12007-07-17 22:40:25 +0200637 acpi_method[3] = 'W';
Rafael J. Wysockiad3399c2008-01-11 00:10:38 +0100638 status = acpi_evaluate_integer(handle, acpi_method, NULL,
639 &d_max);
640 if (ACPI_FAILURE(status)) {
Rafael J. Wysocki761afb82010-10-14 23:24:13 +0200641 if (acpi_target_sleep_state != ACPI_STATE_S0 ||
642 status != AE_NOT_FOUND)
643 d_max = d_min;
Rafael J. Wysockiad3399c2008-01-11 00:10:38 +0100644 } else if (d_max < d_min) {
645 /* Warn the user of the broken DSDT */
646 printk(KERN_WARNING "ACPI: Wrong value from %s\n",
647 acpi_method);
648 /* Sanitize it */
Shaohua Lifd4aff12007-07-17 22:40:25 +0200649 d_min = d_max;
Rafael J. Wysockiad3399c2008-01-11 00:10:38 +0100650 }
Shaohua Lifd4aff12007-07-17 22:40:25 +0200651 }
652
653 if (d_min_p)
654 *d_min_p = d_min;
655 return d_max;
656}
Rafael J. Wysockiaa338602011-02-11 00:06:54 +0100657#endif /* CONFIG_PM */
Rafael J. Wysockieb9d0fe2008-07-07 03:34:48 +0200658
Rafael J. Wysocki761afb82010-10-14 23:24:13 +0200659#ifdef CONFIG_PM_SLEEP
Rafael J. Wysockieb9d0fe2008-07-07 03:34:48 +0200660/**
661 * acpi_pm_device_sleep_wake - enable or disable the system wake-up
662 * capability of given device
663 * @dev: device to handle
664 * @enable: 'true' - enable, 'false' - disable the wake-up capability
665 */
666int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
667{
668 acpi_handle handle;
669 struct acpi_device *adev;
Rafael J. Wysockidf8db912009-09-08 23:13:49 +0200670 int error;
Rafael J. Wysockieb9d0fe2008-07-07 03:34:48 +0200671
Rafael J. Wysocki0baed8d2009-09-08 23:16:24 +0200672 if (!device_can_wakeup(dev))
Rafael J. Wysockieb9d0fe2008-07-07 03:34:48 +0200673 return -EINVAL;
674
675 handle = DEVICE_ACPI_HANDLE(dev);
676 if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
Rafael J. Wysockidf8db912009-09-08 23:13:49 +0200677 dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__);
Rafael J. Wysockieb9d0fe2008-07-07 03:34:48 +0200678 return -ENODEV;
679 }
680
Rafael J. Wysockie8b6f972010-06-25 01:18:39 +0200681 error = enable ?
682 acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) :
683 acpi_disable_wakeup_device_power(adev);
Rafael J. Wysockidf8db912009-09-08 23:13:49 +0200684 if (!error)
685 dev_info(dev, "wake-up capability %s by ACPI\n",
686 enable ? "enabled" : "disabled");
687
688 return error;
Rafael J. Wysockieb9d0fe2008-07-07 03:34:48 +0200689}
Rafael J. Wysocki761afb82010-10-14 23:24:13 +0200690#endif /* CONFIG_PM_SLEEP */
Shaohua Lifd4aff12007-07-17 22:40:25 +0200691
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +0400692static void acpi_power_off_prepare(void)
693{
694 /* Prepare to power off the system */
695 acpi_sleep_prepare(ACPI_STATE_S5);
Lin Ming3d97e422008-12-16 16:57:46 +0800696 acpi_disable_all_gpes();
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +0400697}
698
699static void acpi_power_off(void)
700{
701 /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
Frank Seidel4d939152009-02-04 17:03:07 +0100702 printk(KERN_DEBUG "%s called\n", __func__);
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +0400703 local_irq_disable();
704 acpi_enter_sleep_state(ACPI_STATE_S5);
705}
706
Len Brown96f15ef2009-04-17 23:32:20 -0400707/*
708 * ACPI 2.0 created the optional _GTS and _BFS,
709 * but industry adoption has been neither rapid nor broad.
710 *
711 * Linux gets into trouble when it executes poorly validated
712 * paths through the BIOS, so disable _GTS and _BFS by default,
713 * but do speak up and offer the option to enable them.
714 */
Stephen Hemminger01eac602010-10-18 18:47:25 -0700715static void __init acpi_gts_bfs_check(void)
Len Brown96f15ef2009-04-17 23:32:20 -0400716{
717 acpi_handle dummy;
718
719 if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__GTS, &dummy)))
720 {
721 printk(KERN_NOTICE PREFIX "BIOS offers _GTS\n");
722 printk(KERN_NOTICE PREFIX "If \"acpi.gts=1\" improves suspend, "
723 "please notify linux-acpi@vger.kernel.org\n");
724 }
725 if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__BFS, &dummy)))
726 {
727 printk(KERN_NOTICE PREFIX "BIOS offers _BFS\n");
728 printk(KERN_NOTICE PREFIX "If \"acpi.bfs=1\" improves resume, "
729 "please notify linux-acpi@vger.kernel.org\n");
730 }
731}
732
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500733int __init acpi_sleep_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734{
Rafael J. Wysocki296699d2007-07-29 23:27:18 +0200735 acpi_status status;
736 u8 type_a, type_b;
737#ifdef CONFIG_SUSPEND
Alexey Starikovskiye2a5b422005-03-18 16:20:46 -0500738 int i = 0;
Carlos Corbachoe41fb7c2008-07-23 21:28:43 -0700739
740 dmi_check_system(acpisleep_dmi_table);
Rafael J. Wysocki296699d2007-07-29 23:27:18 +0200741#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742
743 if (acpi_disabled)
744 return 0;
745
Frans Pop5a50fe72007-09-20 22:27:44 +0200746 sleep_states[ACPI_STATE_S0] = 1;
747 printk(KERN_INFO PREFIX "(supports S0");
748
Rafael J. Wysocki296699d2007-07-29 23:27:18 +0200749#ifdef CONFIG_SUSPEND
Frans Pop5a50fe72007-09-20 22:27:44 +0200750 for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 status = acpi_get_sleep_type_data(i, &type_a, &type_b);
752 if (ACPI_SUCCESS(status)) {
753 sleep_states[i] = 1;
754 printk(" S%d", i);
755 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200758 suspend_set_ops(old_suspend_ordering ?
759 &acpi_suspend_ops_old : &acpi_suspend_ops);
Rafael J. Wysocki296699d2007-07-29 23:27:18 +0200760#endif
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -0700761
Rafael J. Wysockib0cb1a12007-07-29 23:24:36 +0200762#ifdef CONFIG_HIBERNATION
Rafael J. Wysocki296699d2007-07-29 23:27:18 +0200763 status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b);
764 if (ACPI_SUCCESS(status)) {
Rafael J. Wysockid8f3de02008-06-12 23:24:06 +0200765 hibernation_set_ops(old_suspend_ordering ?
766 &acpi_hibernation_ops_old : &acpi_hibernation_ops);
Rafael J. Wysocki296699d2007-07-29 23:27:18 +0200767 sleep_states[ACPI_STATE_S4] = 1;
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +0400768 printk(" S4");
Shaohua Libdfe6b72008-07-23 21:28:41 -0700769 if (!nosigcheck) {
Lin Ming3d97e422008-12-16 16:57:46 +0800770 acpi_get_table(ACPI_SIG_FACS, 1,
Shaohua Libdfe6b72008-07-23 21:28:41 -0700771 (struct acpi_table_header **)&facs);
772 if (facs)
773 s4_hardware_signature =
774 facs->hardware_signature;
775 }
Rafael J. Wysocki296699d2007-07-29 23:27:18 +0200776 }
Rafael J. Wysockia3d25c22007-05-09 02:33:18 -0700777#endif
Alexey Starikovskiyf216cc32007-09-20 21:32:35 +0400778 status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b);
779 if (ACPI_SUCCESS(status)) {
780 sleep_states[ACPI_STATE_S5] = 1;
781 printk(" S5");
782 pm_power_off_prepare = acpi_power_off_prepare;
783 pm_power_off = acpi_power_off;
784 }
785 printk(")\n");
Zhao Yakuie49f7112008-08-12 10:20:22 +0800786 /*
787 * Register the tts_notifier to reboot notifier list so that the _TTS
788 * object can also be evaluated when the system enters S5.
789 */
790 register_reboot_notifier(&tts_notifier);
Len Brown96f15ef2009-04-17 23:32:20 -0400791 acpi_gts_bfs_check();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 return 0;
793}