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> |
b24e5098 | 21 | #include <linux/pm_runtime.h> |
f216cc37 AS |
22 | |
23 | #include <asm/io.h> | |
24 | ||
1da177e4 LT |
25 | #include <acpi/acpi_bus.h> |
26 | #include <acpi/acpi_drivers.h> | |
e60cc7a6 BH |
27 | |
28 | #include "internal.h" | |
1da177e4 LT |
29 | #include "sleep.h" |
30 | ||
a2ef5c4f LM |
31 | static unsigned int gts, bfs; |
32 | module_param(gts, uint, 0644); | |
33 | module_param(bfs, uint, 0644); | |
34 | MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend."); | |
35 | MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".); | |
36 | ||
37 | static u8 wake_sleep_flags(void) | |
38 | { | |
39 | u8 flags = ACPI_NO_OPTIONAL_METHODS; | |
40 | ||
41 | if (gts) | |
42 | flags |= ACPI_EXECUTE_GTS; | |
43 | if (bfs) | |
44 | flags |= ACPI_EXECUTE_BFS; | |
45 | ||
46 | return flags; | |
47 | } | |
48 | ||
01eac60b | 49 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
1da177e4 | 50 | |
e49f711c ZY |
51 | static void acpi_sleep_tts_switch(u32 acpi_state) |
52 | { | |
53 | union acpi_object in_arg = { ACPI_TYPE_INTEGER }; | |
54 | struct acpi_object_list arg_list = { 1, &in_arg }; | |
55 | acpi_status status = AE_OK; | |
56 | ||
57 | in_arg.integer.value = acpi_state; | |
58 | status = acpi_evaluate_object(NULL, "\\_TTS", &arg_list, NULL); | |
59 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
60 | /* | |
61 | * OS can't evaluate the _TTS object correctly. Some warning | |
62 | * message will be printed. But it won't break anything. | |
63 | */ | |
64 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); | |
65 | } | |
66 | } | |
67 | ||
68 | static int tts_notify_reboot(struct notifier_block *this, | |
69 | unsigned long code, void *x) | |
70 | { | |
71 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
72 | return NOTIFY_DONE; | |
73 | } | |
74 | ||
75 | static struct notifier_block tts_notifier = { | |
76 | .notifier_call = tts_notify_reboot, | |
77 | .next = NULL, | |
78 | .priority = 0, | |
79 | }; | |
80 | ||
c9b6c8f6 | 81 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
82 | { |
83 | #ifdef CONFIG_ACPI_SLEEP | |
84 | /* do we have a wakeup address for S2 and S3? */ | |
85 | if (acpi_state == ACPI_STATE_S3) { | |
86 | if (!acpi_wakeup_address) { | |
87 | return -EFAULT; | |
88 | } | |
4b4f7280 PA |
89 | acpi_set_firmware_waking_vector( |
90 | (acpi_physical_address)acpi_wakeup_address); | |
2f3f2226 AS |
91 | |
92 | } | |
93 | ACPI_FLUSH_CPU_CACHE(); | |
2f3f2226 | 94 | #endif |
c9b6c8f6 RW |
95 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
96 | acpi_state); | |
78f5f023 | 97 | acpi_enable_wakeup_devices(acpi_state); |
2f3f2226 AS |
98 | acpi_enter_sleep_state_prep(acpi_state); |
99 | return 0; | |
100 | } | |
101 | ||
5d1e072b | 102 | #ifdef CONFIG_ACPI_SLEEP |
091aad6a JB |
103 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
104 | ||
72ad5d77 RW |
105 | /* |
106 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
107 | * and to restore them during the subsequent resume. Windows does that also for | |
108 | * suspend to RAM. However, it is known that this mechanism does not work on | |
109 | * all machines, so we allow the user to disable it with the help of the | |
110 | * 'acpi_sleep=nonvs' kernel command line option. | |
111 | */ | |
112 | static bool nvs_nosave; | |
113 | ||
114 | void __init acpi_nvs_nosave(void) | |
115 | { | |
116 | nvs_nosave = true; | |
117 | } | |
118 | ||
d8f3de0d RW |
119 | /* |
120 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
121 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
122 | * kernel command line option that causes the following variable to be set. | |
123 | */ | |
124 | static bool old_suspend_ordering; | |
125 | ||
126 | void __init acpi_old_suspend_ordering(void) | |
127 | { | |
128 | old_suspend_ordering = true; | |
129 | } | |
130 | ||
131 | /** | |
d5a64513 | 132 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 133 | */ |
d5a64513 | 134 | static int acpi_pm_freeze(void) |
d8f3de0d | 135 | { |
3d97e426 | 136 | acpi_disable_all_gpes(); |
d5a64513 | 137 | acpi_os_wait_events_complete(NULL); |
fe955682 | 138 | acpi_ec_block_transactions(); |
d8f3de0d RW |
139 | return 0; |
140 | } | |
141 | ||
c5f7a1bb RW |
142 | /** |
143 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
144 | */ | |
145 | static int acpi_pm_pre_suspend(void) | |
146 | { | |
147 | acpi_pm_freeze(); | |
26fcaf60 | 148 | return suspend_nvs_save(); |
c5f7a1bb RW |
149 | } |
150 | ||
d8f3de0d RW |
151 | /** |
152 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
153 | * | |
154 | * If necessary, set the firmware waking vector and do arch-specific | |
155 | * nastiness to get the wakeup code to the waking vector. | |
156 | */ | |
157 | static int __acpi_pm_prepare(void) | |
158 | { | |
159 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
160 | if (error) |
161 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 162 | |
d8f3de0d RW |
163 | return error; |
164 | } | |
165 | ||
166 | /** | |
167 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
168 | * state and disable the GPEs. | |
169 | */ | |
170 | static int acpi_pm_prepare(void) | |
171 | { | |
172 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 173 | if (!error) |
26fcaf60 | 174 | error = acpi_pm_pre_suspend(); |
d5a64513 | 175 | |
d8f3de0d RW |
176 | return error; |
177 | } | |
178 | ||
179 | /** | |
180 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
181 | * | |
182 | * This is called after we wake back up (or if entering the sleep state | |
183 | * failed). | |
184 | */ | |
185 | static void acpi_pm_finish(void) | |
186 | { | |
187 | u32 acpi_state = acpi_target_sleep_state; | |
188 | ||
42de5532 | 189 | acpi_ec_unblock_transactions(); |
d551d81d | 190 | suspend_nvs_free(); |
2a6b6976 | 191 | |
d8f3de0d RW |
192 | if (acpi_state == ACPI_STATE_S0) |
193 | return; | |
1da177e4 | 194 | |
d8f3de0d RW |
195 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
196 | acpi_state); | |
78f5f023 | 197 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
198 | acpi_leave_sleep_state(acpi_state); |
199 | ||
200 | /* reset firmware waking vector */ | |
201 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
202 | ||
203 | acpi_target_sleep_state = ACPI_STATE_S0; | |
204 | } | |
205 | ||
206 | /** | |
207 | * acpi_pm_end - Finish up suspend sequence. | |
208 | */ | |
209 | static void acpi_pm_end(void) | |
210 | { | |
211 | /* | |
212 | * This is necessary in case acpi_pm_finish() is not called during a | |
213 | * failing transition to a sleep state. | |
214 | */ | |
215 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 216 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 217 | } |
92daa7b5 RW |
218 | #else /* !CONFIG_ACPI_SLEEP */ |
219 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
5d1e072b | 220 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 221 | |
d8f3de0d | 222 | #ifdef CONFIG_SUSPEND |
1da177e4 | 223 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
224 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
225 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
226 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 227 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
228 | }; |
229 | ||
e9b3aba8 | 230 | /** |
2c6e33c3 | 231 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
232 | * associated with given @pm_state, if supported. |
233 | */ | |
2c6e33c3 | 234 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
235 | { |
236 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
237 | int error = 0; | |
238 | ||
72ad5d77 | 239 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
240 | if (error) |
241 | return error; | |
242 | ||
e9b3aba8 RW |
243 | if (sleep_states[acpi_state]) { |
244 | acpi_target_sleep_state = acpi_state; | |
e49f711c | 245 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
e9b3aba8 RW |
246 | } else { |
247 | printk(KERN_ERR "ACPI does not support this state: %d\n", | |
248 | pm_state); | |
249 | error = -ENOSYS; | |
250 | } | |
251 | return error; | |
252 | } | |
253 | ||
1da177e4 | 254 | /** |
2c6e33c3 | 255 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 256 | * @pm_state: ignored |
1da177e4 | 257 | * |
50ad147a RW |
258 | * Flush caches and go to sleep. For STR we have to call arch-specific |
259 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
260 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
261 | */ | |
2c6e33c3 | 262 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
263 | { |
264 | acpi_status status = AE_OK; | |
e9b3aba8 | 265 | u32 acpi_state = acpi_target_sleep_state; |
a2ef5c4f | 266 | u8 flags = wake_sleep_flags(); |
979f11b0 | 267 | int error; |
1da177e4 LT |
268 | |
269 | ACPI_FLUSH_CPU_CACHE(); | |
270 | ||
e9b3aba8 RW |
271 | switch (acpi_state) { |
272 | case ACPI_STATE_S1: | |
1da177e4 | 273 | barrier(); |
a2ef5c4f | 274 | status = acpi_enter_sleep_state(acpi_state, flags); |
1da177e4 LT |
275 | break; |
276 | ||
e9b3aba8 | 277 | case ACPI_STATE_S3: |
f1a2003e | 278 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
279 | if (error) |
280 | return error; | |
7a63f08b | 281 | pr_info(PREFIX "Low-level resume complete\n"); |
1da177e4 | 282 | break; |
1da177e4 | 283 | } |
872d83d0 | 284 | |
b6dacf63 MG |
285 | /* This violates the spec but is required for bug compatibility. */ |
286 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 287 | |
c95d47a8 | 288 | /* Reprogram control registers and execute _BFS */ |
a2ef5c4f | 289 | acpi_leave_sleep_state_prep(acpi_state, flags); |
c95d47a8 | 290 | |
23b168d4 | 291 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
292 | * of the OSPM to clear the status bit [ implying that the |
293 | * POWER_BUTTON event should not reach userspace ] | |
294 | */ | |
295 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) | |
296 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
297 | ||
a3627f67 SL |
298 | /* |
299 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
300 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
301 | * acpi_leave_sleep_state will reenable specific GPEs later | |
302 | */ | |
3d97e426 | 303 | acpi_disable_all_gpes(); |
d5a64513 | 304 | /* Allow EC transactions to happen. */ |
fe955682 | 305 | acpi_ec_unblock_transactions_early(); |
a3627f67 | 306 | |
2a6b6976 MG |
307 | suspend_nvs_restore(); |
308 | ||
1da177e4 LT |
309 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
310 | } | |
311 | ||
2c6e33c3 | 312 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 313 | { |
e8c9c502 | 314 | u32 acpi_state; |
eb9289eb | 315 | |
e8c9c502 JB |
316 | switch (pm_state) { |
317 | case PM_SUSPEND_ON: | |
318 | case PM_SUSPEND_STANDBY: | |
319 | case PM_SUSPEND_MEM: | |
320 | acpi_state = acpi_suspend_states[pm_state]; | |
321 | ||
322 | return sleep_states[acpi_state]; | |
323 | default: | |
324 | return 0; | |
325 | } | |
eb9289eb SL |
326 | } |
327 | ||
2f55ac07 | 328 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
329 | .valid = acpi_suspend_state_valid, |
330 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 331 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 332 | .enter = acpi_suspend_enter, |
618d7fd0 | 333 | .wake = acpi_pm_finish, |
d8f3de0d RW |
334 | .end = acpi_pm_end, |
335 | }; | |
336 | ||
337 | /** | |
338 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
339 | * state associated with given @pm_state, if supported, and | |
340 | * execute the _PTS control method. This function is used if the | |
341 | * pre-ACPI 2.0 suspend ordering has been requested. | |
342 | */ | |
343 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
344 | { | |
345 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
346 | if (!error) |
347 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 348 | |
d8f3de0d RW |
349 | return error; |
350 | } | |
351 | ||
352 | /* | |
353 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
354 | * been requested. | |
355 | */ | |
2f55ac07 | 356 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
357 | .valid = acpi_suspend_state_valid, |
358 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 359 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 360 | .enter = acpi_suspend_enter, |
618d7fd0 | 361 | .wake = acpi_pm_finish, |
d8f3de0d RW |
362 | .end = acpi_pm_end, |
363 | .recover = acpi_pm_finish, | |
1da177e4 | 364 | }; |
e41fb7c5 CC |
365 | |
366 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) | |
367 | { | |
368 | old_suspend_ordering = true; | |
369 | return 0; | |
370 | } | |
371 | ||
53998648 RW |
372 | static int __init init_nvs_nosave(const struct dmi_system_id *d) |
373 | { | |
374 | acpi_nvs_nosave(); | |
375 | return 0; | |
376 | } | |
377 | ||
e41fb7c5 CC |
378 | static struct dmi_system_id __initdata acpisleep_dmi_table[] = { |
379 | { | |
380 | .callback = init_old_suspend_ordering, | |
381 | .ident = "Abit KN9 (nForce4 variant)", | |
382 | .matches = { | |
383 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
384 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
385 | }, | |
386 | }, | |
4fb507b6 RW |
387 | { |
388 | .callback = init_old_suspend_ordering, | |
389 | .ident = "HP xw4600 Workstation", | |
390 | .matches = { | |
391 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
392 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
393 | }, | |
394 | }, | |
65df7847 | 395 | { |
a1404495 AW |
396 | .callback = init_old_suspend_ordering, |
397 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
398 | .matches = { | |
399 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
400 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
401 | }, | |
402 | }, | |
45e77988 | 403 | { |
2a9ef8e1 ZY |
404 | .callback = init_old_suspend_ordering, |
405 | .ident = "Panasonic CF51-2L", | |
406 | .matches = { | |
407 | DMI_MATCH(DMI_BOARD_VENDOR, | |
408 | "Matsushita Electric Industrial Co.,Ltd."), | |
409 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
410 | }, | |
411 | }, | |
53998648 RW |
412 | { |
413 | .callback = init_nvs_nosave, | |
d11c78e9 DJ |
414 | .ident = "Sony Vaio VGN-FW21E", |
415 | .matches = { | |
416 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
417 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
418 | }, | |
419 | }, | |
420 | { | |
421 | .callback = init_nvs_nosave, | |
ddf6ce45 DJ |
422 | .ident = "Sony Vaio VPCEB17FX", |
423 | .matches = { | |
424 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
425 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
426 | }, | |
427 | }, | |
428 | { | |
429 | .callback = init_nvs_nosave, | |
53998648 RW |
430 | .ident = "Sony Vaio VGN-SR11M", |
431 | .matches = { | |
432 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
433 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
434 | }, | |
435 | }, | |
436 | { | |
437 | .callback = init_nvs_nosave, | |
438 | .ident = "Everex StepNote Series", | |
439 | .matches = { | |
440 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
441 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
442 | }, | |
443 | }, | |
af48931c RW |
444 | { |
445 | .callback = init_nvs_nosave, | |
446 | .ident = "Sony Vaio VPCEB1Z1E", | |
447 | .matches = { | |
448 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
449 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
450 | }, | |
451 | }, | |
291a73c9 RW |
452 | { |
453 | .callback = init_nvs_nosave, | |
454 | .ident = "Sony Vaio VGN-NW130D", | |
455 | .matches = { | |
456 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
457 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
458 | }, | |
459 | }, | |
7b330707 RW |
460 | { |
461 | .callback = init_nvs_nosave, | |
93f77084 LT |
462 | .ident = "Sony Vaio VPCCW29FX", |
463 | .matches = { | |
464 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
465 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
466 | }, | |
467 | }, | |
468 | { | |
469 | .callback = init_nvs_nosave, | |
7b330707 RW |
470 | .ident = "Averatec AV1020-ED2", |
471 | .matches = { | |
472 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
473 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
474 | }, | |
475 | }, | |
bb0c5ed6 ZR |
476 | { |
477 | .callback = init_old_suspend_ordering, | |
478 | .ident = "Asus A8N-SLI DELUXE", | |
479 | .matches = { | |
480 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
481 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
482 | }, | |
483 | }, | |
484 | { | |
485 | .callback = init_old_suspend_ordering, | |
486 | .ident = "Asus A8N-SLI Premium", | |
487 | .matches = { | |
488 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
489 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
490 | }, | |
491 | }, | |
89e8ea12 RW |
492 | { |
493 | .callback = init_nvs_nosave, | |
494 | .ident = "Sony Vaio VGN-SR26GN_P", | |
495 | .matches = { | |
496 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
497 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
498 | }, | |
499 | }, | |
731b25a4 BR |
500 | { |
501 | .callback = init_nvs_nosave, | |
502 | .ident = "Sony Vaio VGN-FW520F", | |
503 | .matches = { | |
504 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
505 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
506 | }, | |
507 | }, | |
5a50a7c3 KYL |
508 | { |
509 | .callback = init_nvs_nosave, | |
510 | .ident = "Asus K54C", | |
511 | .matches = { | |
512 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
513 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
514 | }, | |
515 | }, | |
516 | { | |
517 | .callback = init_nvs_nosave, | |
518 | .ident = "Asus K54HR", | |
519 | .matches = { | |
520 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
521 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
522 | }, | |
523 | }, | |
e41fb7c5 CC |
524 | {}, |
525 | }; | |
296699de RW |
526 | #endif /* CONFIG_SUSPEND */ |
527 | ||
b0cb1a19 | 528 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
529 | static unsigned long s4_hardware_signature; |
530 | static struct acpi_table_facs *facs; | |
531 | static bool nosigcheck; | |
532 | ||
533 | void __init acpi_no_s4_hw_signature(void) | |
534 | { | |
535 | nosigcheck = true; | |
536 | } | |
537 | ||
caea99ef | 538 | static int acpi_hibernation_begin(void) |
74f270af | 539 | { |
3f4b0ef7 RW |
540 | int error; |
541 | ||
72ad5d77 | 542 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
3f4b0ef7 RW |
543 | if (!error) { |
544 | acpi_target_sleep_state = ACPI_STATE_S4; | |
545 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
546 | } | |
547 | ||
548 | return error; | |
549 | } | |
550 | ||
a3d25c27 RW |
551 | static int acpi_hibernation_enter(void) |
552 | { | |
a2ef5c4f | 553 | u8 flags = wake_sleep_flags(); |
a3d25c27 | 554 | acpi_status status = AE_OK; |
a3d25c27 RW |
555 | |
556 | ACPI_FLUSH_CPU_CACHE(); | |
557 | ||
a3d25c27 | 558 | /* This shouldn't return. If it returns, we have a problem */ |
a2ef5c4f | 559 | status = acpi_enter_sleep_state(ACPI_STATE_S4, flags); |
c95d47a8 | 560 | /* Reprogram control registers and execute _BFS */ |
a2ef5c4f | 561 | acpi_leave_sleep_state_prep(ACPI_STATE_S4, flags); |
a3d25c27 RW |
562 | |
563 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
564 | } | |
565 | ||
c7e0831d RW |
566 | static void acpi_hibernation_leave(void) |
567 | { | |
a2ef5c4f LM |
568 | u8 flags = wake_sleep_flags(); |
569 | ||
c7e0831d RW |
570 | /* |
571 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
572 | * enable it here. | |
573 | */ | |
574 | acpi_enable(); | |
c95d47a8 | 575 | /* Reprogram control registers and execute _BFS */ |
a2ef5c4f | 576 | acpi_leave_sleep_state_prep(ACPI_STATE_S4, flags); |
bdfe6b7c SL |
577 | /* Check the hardware signature */ |
578 | if (facs && s4_hardware_signature != facs->hardware_signature) { | |
579 | printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " | |
580 | "cannot resume!\n"); | |
581 | panic("ACPI S4 hardware signature mismatch"); | |
582 | } | |
3f4b0ef7 | 583 | /* Restore the NVS memory area */ |
dd4c4f17 | 584 | suspend_nvs_restore(); |
d5a64513 | 585 | /* Allow EC transactions to happen. */ |
fe955682 | 586 | acpi_ec_unblock_transactions_early(); |
c7e0831d RW |
587 | } |
588 | ||
d5a64513 | 589 | static void acpi_pm_thaw(void) |
f6bb13aa | 590 | { |
fe955682 | 591 | acpi_ec_unblock_transactions(); |
3d97e426 | 592 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
593 | } |
594 | ||
073ef1f6 | 595 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
596 | .begin = acpi_hibernation_begin, |
597 | .end = acpi_pm_end, | |
c5f7a1bb | 598 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 599 | .finish = acpi_pm_finish, |
d8f3de0d RW |
600 | .prepare = acpi_pm_prepare, |
601 | .enter = acpi_hibernation_enter, | |
602 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
603 | .pre_restore = acpi_pm_freeze, |
604 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 605 | }; |
caea99ef | 606 | |
d8f3de0d RW |
607 | /** |
608 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
609 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
610 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
611 | * requested. | |
612 | */ | |
613 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 614 | { |
e49f711c ZY |
615 | int error; |
616 | /* | |
617 | * The _TTS object should always be evaluated before the _PTS object. | |
618 | * When the old_suspended_ordering is true, the _PTS object is | |
619 | * evaluated in the acpi_sleep_prepare. | |
620 | */ | |
621 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
622 | ||
623 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 624 | |
3f4b0ef7 | 625 | if (!error) { |
72ad5d77 | 626 | if (!nvs_nosave) |
dd4c4f17 | 627 | error = suspend_nvs_alloc(); |
3f4b0ef7 RW |
628 | if (!error) |
629 | acpi_target_sleep_state = ACPI_STATE_S4; | |
630 | } | |
631 | return error; | |
632 | } | |
633 | ||
d8f3de0d RW |
634 | /* |
635 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
636 | * been requested. | |
637 | */ | |
073ef1f6 | 638 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
639 | .begin = acpi_hibernation_begin_old, |
640 | .end = acpi_pm_end, | |
c5f7a1bb | 641 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 642 | .prepare = acpi_pm_freeze, |
2a6b6976 | 643 | .finish = acpi_pm_finish, |
a3d25c27 | 644 | .enter = acpi_hibernation_enter, |
c7e0831d | 645 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
646 | .pre_restore = acpi_pm_freeze, |
647 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 648 | .recover = acpi_pm_finish, |
a3d25c27 | 649 | }; |
d8f3de0d | 650 | #endif /* CONFIG_HIBERNATION */ |
a3d25c27 | 651 | |
296699de RW |
652 | int acpi_suspend(u32 acpi_state) |
653 | { | |
654 | suspend_state_t states[] = { | |
655 | [1] = PM_SUSPEND_STANDBY, | |
656 | [3] = PM_SUSPEND_MEM, | |
657 | [5] = PM_SUSPEND_MAX | |
658 | }; | |
659 | ||
660 | if (acpi_state < 6 && states[acpi_state]) | |
661 | return pm_suspend(states[acpi_state]); | |
662 | if (acpi_state == 4) | |
663 | return hibernate(); | |
664 | return -EINVAL; | |
665 | } | |
666 | ||
aa338601 | 667 | #ifdef CONFIG_PM |
fd4aff1a SL |
668 | /** |
669 | * acpi_pm_device_sleep_state - return preferred power state of ACPI device | |
670 | * in the system sleep state given by %acpi_target_sleep_state | |
2fe2de5f DB |
671 | * @dev: device to examine; its driver model wakeup flags control |
672 | * whether it should be able to wake up the system | |
fd4aff1a SL |
673 | * @d_min_p: used to store the upper limit of allowed states range |
674 | * Return value: preferred power state of the device on success, -ENODEV on | |
675 | * failure (ie. if there's no 'struct acpi_device' for @dev) | |
676 | * | |
677 | * Find the lowest power (highest number) ACPI device power state that | |
678 | * device @dev can be in while the system is in the sleep state represented | |
679 | * by %acpi_target_sleep_state. If @wake is nonzero, the device should be | |
680 | * able to wake up the system from this sleep state. If @d_min_p is set, | |
681 | * the highest power (lowest number) device power state of @dev allowed | |
682 | * in this system sleep state is stored at the location pointed to by it. | |
683 | * | |
684 | * The caller must ensure that @dev is valid before using this function. | |
685 | * The caller is also responsible for figuring out if the device is | |
686 | * supposed to be able to wake up the system and passing this information | |
687 | * via @wake. | |
688 | */ | |
689 | ||
2fe2de5f | 690 | int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p) |
fd4aff1a SL |
691 | { |
692 | acpi_handle handle = DEVICE_ACPI_HANDLE(dev); | |
693 | struct acpi_device *adev; | |
694 | char acpi_method[] = "_SxD"; | |
27663c58 | 695 | unsigned long long d_min, d_max; |
fd4aff1a SL |
696 | |
697 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
ead77594 | 698 | printk(KERN_DEBUG "ACPI handle has no context!\n"); |
fd4aff1a SL |
699 | return -ENODEV; |
700 | } | |
701 | ||
702 | acpi_method[2] = '0' + acpi_target_sleep_state; | |
703 | /* | |
704 | * If the sleep state is S0, we will return D3, but if the device has | |
705 | * _S0W, we will use the value from _S0W | |
706 | */ | |
707 | d_min = ACPI_STATE_D0; | |
708 | d_max = ACPI_STATE_D3; | |
709 | ||
710 | /* | |
711 | * If present, _SxD methods return the minimum D-state (highest power | |
712 | * state) we can use for the corresponding S-states. Otherwise, the | |
713 | * minimum D-state is D0 (ACPI 3.x). | |
714 | * | |
715 | * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer | |
716 | * provided -- that's our fault recovery, we ignore retval. | |
717 | */ | |
718 | if (acpi_target_sleep_state > ACPI_STATE_S0) | |
719 | acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); | |
720 | ||
721 | /* | |
722 | * If _PRW says we can wake up the system from the target sleep state, | |
723 | * the D-state returned by _SxD is sufficient for that (we assume a | |
724 | * wakeup-aware driver if wake is set). Still, if _SxW exists | |
725 | * (ACPI 3.x), it should return the maximum (lowest power) D-state that | |
726 | * can wake the system. _S0W may be valid, too. | |
727 | */ | |
728 | if (acpi_target_sleep_state == ACPI_STATE_S0 || | |
761afb86 | 729 | (device_may_wakeup(dev) && |
fd4aff1a | 730 | adev->wakeup.sleep_state <= acpi_target_sleep_state)) { |
ad3399c3 RW |
731 | acpi_status status; |
732 | ||
fd4aff1a | 733 | acpi_method[3] = 'W'; |
ad3399c3 RW |
734 | status = acpi_evaluate_integer(handle, acpi_method, NULL, |
735 | &d_max); | |
736 | if (ACPI_FAILURE(status)) { | |
761afb86 RW |
737 | if (acpi_target_sleep_state != ACPI_STATE_S0 || |
738 | status != AE_NOT_FOUND) | |
739 | d_max = d_min; | |
ad3399c3 RW |
740 | } else if (d_max < d_min) { |
741 | /* Warn the user of the broken DSDT */ | |
742 | printk(KERN_WARNING "ACPI: Wrong value from %s\n", | |
743 | acpi_method); | |
744 | /* Sanitize it */ | |
fd4aff1a | 745 | d_min = d_max; |
ad3399c3 | 746 | } |
fd4aff1a SL |
747 | } |
748 | ||
749 | if (d_min_p) | |
750 | *d_min_p = d_min; | |
751 | return d_max; | |
752 | } | |
aa338601 | 753 | #endif /* CONFIG_PM */ |
eb9d0fe4 | 754 | |
761afb86 | 755 | #ifdef CONFIG_PM_SLEEP |
b24e5098 LM |
756 | /** |
757 | * acpi_pm_device_run_wake - Enable/disable wake-up for given device. | |
758 | * @phys_dev: Device to enable/disable the platform to wake-up the system for. | |
759 | * @enable: Whether enable or disable the wake-up functionality. | |
760 | * | |
761 | * Find the ACPI device object corresponding to @pci_dev and try to | |
762 | * enable/disable the GPE associated with it. | |
763 | */ | |
764 | int acpi_pm_device_run_wake(struct device *phys_dev, bool enable) | |
765 | { | |
766 | struct acpi_device *dev; | |
767 | acpi_handle handle; | |
768 | ||
769 | if (!device_run_wake(phys_dev)) | |
770 | return -EINVAL; | |
771 | ||
772 | handle = DEVICE_ACPI_HANDLE(phys_dev); | |
773 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &dev))) { | |
774 | dev_dbg(phys_dev, "ACPI handle has no context in %s!\n", | |
775 | __func__); | |
776 | return -ENODEV; | |
777 | } | |
778 | ||
779 | if (enable) { | |
780 | acpi_enable_wakeup_device_power(dev, ACPI_STATE_S0); | |
781 | acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number); | |
782 | } else { | |
783 | acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number); | |
784 | acpi_disable_wakeup_device_power(dev); | |
785 | } | |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
eb9d0fe4 RW |
790 | /** |
791 | * acpi_pm_device_sleep_wake - enable or disable the system wake-up | |
792 | * capability of given device | |
793 | * @dev: device to handle | |
794 | * @enable: 'true' - enable, 'false' - disable the wake-up capability | |
795 | */ | |
796 | int acpi_pm_device_sleep_wake(struct device *dev, bool enable) | |
797 | { | |
798 | acpi_handle handle; | |
799 | struct acpi_device *adev; | |
df8db91f | 800 | int error; |
eb9d0fe4 | 801 | |
0baed8da | 802 | if (!device_can_wakeup(dev)) |
eb9d0fe4 RW |
803 | return -EINVAL; |
804 | ||
805 | handle = DEVICE_ACPI_HANDLE(dev); | |
806 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
df8db91f | 807 | dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__); |
eb9d0fe4 RW |
808 | return -ENODEV; |
809 | } | |
810 | ||
e8b6f970 RW |
811 | error = enable ? |
812 | acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) : | |
813 | acpi_disable_wakeup_device_power(adev); | |
df8db91f RW |
814 | if (!error) |
815 | dev_info(dev, "wake-up capability %s by ACPI\n", | |
816 | enable ? "enabled" : "disabled"); | |
817 | ||
818 | return error; | |
eb9d0fe4 | 819 | } |
761afb86 | 820 | #endif /* CONFIG_PM_SLEEP */ |
fd4aff1a | 821 | |
f216cc37 AS |
822 | static void acpi_power_off_prepare(void) |
823 | { | |
824 | /* Prepare to power off the system */ | |
825 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 826 | acpi_disable_all_gpes(); |
f216cc37 AS |
827 | } |
828 | ||
829 | static void acpi_power_off(void) | |
830 | { | |
a2ef5c4f LM |
831 | u8 flags = wake_sleep_flags(); |
832 | ||
f216cc37 | 833 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ |
4d939155 | 834 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 835 | local_irq_disable(); |
a2ef5c4f | 836 | acpi_enter_sleep_state(ACPI_STATE_S5, flags); |
f216cc37 AS |
837 | } |
838 | ||
96f15efc LB |
839 | /* |
840 | * ACPI 2.0 created the optional _GTS and _BFS, | |
841 | * but industry adoption has been neither rapid nor broad. | |
842 | * | |
843 | * Linux gets into trouble when it executes poorly validated | |
844 | * paths through the BIOS, so disable _GTS and _BFS by default, | |
845 | * but do speak up and offer the option to enable them. | |
846 | */ | |
01eac60b | 847 | static void __init acpi_gts_bfs_check(void) |
96f15efc LB |
848 | { |
849 | acpi_handle dummy; | |
850 | ||
4efeeecd | 851 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_PATHNAME__GTS, &dummy))) |
96f15efc LB |
852 | { |
853 | printk(KERN_NOTICE PREFIX "BIOS offers _GTS\n"); | |
854 | printk(KERN_NOTICE PREFIX "If \"acpi.gts=1\" improves suspend, " | |
855 | "please notify linux-acpi@vger.kernel.org\n"); | |
856 | } | |
4efeeecd | 857 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_PATHNAME__BFS, &dummy))) |
96f15efc LB |
858 | { |
859 | printk(KERN_NOTICE PREFIX "BIOS offers _BFS\n"); | |
860 | printk(KERN_NOTICE PREFIX "If \"acpi.bfs=1\" improves resume, " | |
861 | "please notify linux-acpi@vger.kernel.org\n"); | |
862 | } | |
863 | } | |
864 | ||
aafbcd16 | 865 | int __init acpi_sleep_init(void) |
1da177e4 | 866 | { |
296699de RW |
867 | acpi_status status; |
868 | u8 type_a, type_b; | |
869 | #ifdef CONFIG_SUSPEND | |
e2a5b420 | 870 | int i = 0; |
e41fb7c5 CC |
871 | |
872 | dmi_check_system(acpisleep_dmi_table); | |
296699de | 873 | #endif |
1da177e4 LT |
874 | |
875 | if (acpi_disabled) | |
876 | return 0; | |
877 | ||
5a50fe70 FP |
878 | sleep_states[ACPI_STATE_S0] = 1; |
879 | printk(KERN_INFO PREFIX "(supports S0"); | |
880 | ||
296699de | 881 | #ifdef CONFIG_SUSPEND |
5a50fe70 | 882 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { |
1da177e4 LT |
883 | status = acpi_get_sleep_type_data(i, &type_a, &type_b); |
884 | if (ACPI_SUCCESS(status)) { | |
885 | sleep_states[i] = 1; | |
886 | printk(" S%d", i); | |
887 | } | |
1da177e4 | 888 | } |
1da177e4 | 889 | |
d8f3de0d RW |
890 | suspend_set_ops(old_suspend_ordering ? |
891 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
296699de | 892 | #endif |
a3d25c27 | 893 | |
b0cb1a19 | 894 | #ifdef CONFIG_HIBERNATION |
296699de RW |
895 | status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); |
896 | if (ACPI_SUCCESS(status)) { | |
d8f3de0d RW |
897 | hibernation_set_ops(old_suspend_ordering ? |
898 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
296699de | 899 | sleep_states[ACPI_STATE_S4] = 1; |
f216cc37 | 900 | printk(" S4"); |
bdfe6b7c | 901 | if (!nosigcheck) { |
3d97e426 | 902 | acpi_get_table(ACPI_SIG_FACS, 1, |
bdfe6b7c SL |
903 | (struct acpi_table_header **)&facs); |
904 | if (facs) | |
905 | s4_hardware_signature = | |
906 | facs->hardware_signature; | |
907 | } | |
296699de | 908 | } |
a3d25c27 | 909 | #endif |
f216cc37 AS |
910 | status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
911 | if (ACPI_SUCCESS(status)) { | |
912 | sleep_states[ACPI_STATE_S5] = 1; | |
913 | printk(" S5"); | |
914 | pm_power_off_prepare = acpi_power_off_prepare; | |
915 | pm_power_off = acpi_power_off; | |
916 | } | |
917 | printk(")\n"); | |
e49f711c ZY |
918 | /* |
919 | * Register the tts_notifier to reboot notifier list so that the _TTS | |
920 | * object can also be evaluated when the system enters S5. | |
921 | */ | |
922 | register_reboot_notifier(&tts_notifier); | |
96f15efc | 923 | acpi_gts_bfs_check(); |
1da177e4 LT |
924 | return 0; |
925 | } |