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 | ||
2a14e541 | 31 | u8 wake_sleep_flags = ACPI_NO_OPTIONAL_METHODS; |
a2ef5c4f | 32 | static unsigned int gts, bfs; |
2a14e541 | 33 | static int set_param_wake_flag(const char *val, struct kernel_param *kp) |
a2ef5c4f | 34 | { |
2a14e541 | 35 | int ret = param_set_int(val, kp); |
a2ef5c4f | 36 | |
2a14e541 KRW |
37 | if (ret) |
38 | return ret; | |
a2ef5c4f | 39 | |
2a14e541 KRW |
40 | if (kp->arg == (const char *)>s) { |
41 | if (gts) | |
42 | wake_sleep_flags |= ACPI_EXECUTE_GTS; | |
43 | else | |
44 | wake_sleep_flags &= ~ACPI_EXECUTE_GTS; | |
45 | } | |
46 | if (kp->arg == (const char *)&bfs) { | |
47 | if (bfs) | |
48 | wake_sleep_flags |= ACPI_EXECUTE_BFS; | |
49 | else | |
50 | wake_sleep_flags &= ~ACPI_EXECUTE_BFS; | |
51 | } | |
52 | return ret; | |
a2ef5c4f | 53 | } |
2a14e541 KRW |
54 | module_param_call(gts, set_param_wake_flag, param_get_int, >s, 0644); |
55 | module_param_call(bfs, set_param_wake_flag, param_get_int, &bfs, 0644); | |
56 | MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend."); | |
57 | MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".); | |
a2ef5c4f | 58 | |
01eac60b | 59 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
1da177e4 | 60 | |
e49f711c ZY |
61 | static void acpi_sleep_tts_switch(u32 acpi_state) |
62 | { | |
63 | union acpi_object in_arg = { ACPI_TYPE_INTEGER }; | |
64 | struct acpi_object_list arg_list = { 1, &in_arg }; | |
65 | acpi_status status = AE_OK; | |
66 | ||
67 | in_arg.integer.value = acpi_state; | |
68 | status = acpi_evaluate_object(NULL, "\\_TTS", &arg_list, NULL); | |
69 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
70 | /* | |
71 | * OS can't evaluate the _TTS object correctly. Some warning | |
72 | * message will be printed. But it won't break anything. | |
73 | */ | |
74 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); | |
75 | } | |
76 | } | |
77 | ||
78 | static int tts_notify_reboot(struct notifier_block *this, | |
79 | unsigned long code, void *x) | |
80 | { | |
81 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
82 | return NOTIFY_DONE; | |
83 | } | |
84 | ||
85 | static struct notifier_block tts_notifier = { | |
86 | .notifier_call = tts_notify_reboot, | |
87 | .next = NULL, | |
88 | .priority = 0, | |
89 | }; | |
90 | ||
c9b6c8f6 | 91 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
92 | { |
93 | #ifdef CONFIG_ACPI_SLEEP | |
94 | /* do we have a wakeup address for S2 and S3? */ | |
95 | if (acpi_state == ACPI_STATE_S3) { | |
319b6ffc | 96 | if (!acpi_wakeup_address) |
2f3f2226 | 97 | return -EFAULT; |
319b6ffc | 98 | acpi_set_firmware_waking_vector(acpi_wakeup_address); |
2f3f2226 AS |
99 | |
100 | } | |
101 | ACPI_FLUSH_CPU_CACHE(); | |
2f3f2226 | 102 | #endif |
c9b6c8f6 RW |
103 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
104 | acpi_state); | |
78f5f023 | 105 | acpi_enable_wakeup_devices(acpi_state); |
2f3f2226 AS |
106 | acpi_enter_sleep_state_prep(acpi_state); |
107 | return 0; | |
108 | } | |
109 | ||
5d1e072b | 110 | #ifdef CONFIG_ACPI_SLEEP |
091aad6a JB |
111 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
112 | ||
72ad5d77 RW |
113 | /* |
114 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
115 | * and to restore them during the subsequent resume. Windows does that also for | |
116 | * suspend to RAM. However, it is known that this mechanism does not work on | |
117 | * all machines, so we allow the user to disable it with the help of the | |
118 | * 'acpi_sleep=nonvs' kernel command line option. | |
119 | */ | |
120 | static bool nvs_nosave; | |
121 | ||
122 | void __init acpi_nvs_nosave(void) | |
123 | { | |
124 | nvs_nosave = true; | |
125 | } | |
126 | ||
d8f3de0d RW |
127 | /* |
128 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
129 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
130 | * kernel command line option that causes the following variable to be set. | |
131 | */ | |
132 | static bool old_suspend_ordering; | |
133 | ||
134 | void __init acpi_old_suspend_ordering(void) | |
135 | { | |
136 | old_suspend_ordering = true; | |
137 | } | |
138 | ||
139 | /** | |
d5a64513 | 140 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 141 | */ |
d5a64513 | 142 | static int acpi_pm_freeze(void) |
d8f3de0d | 143 | { |
3d97e426 | 144 | acpi_disable_all_gpes(); |
d5a64513 | 145 | acpi_os_wait_events_complete(NULL); |
fe955682 | 146 | acpi_ec_block_transactions(); |
d8f3de0d RW |
147 | return 0; |
148 | } | |
149 | ||
c5f7a1bb RW |
150 | /** |
151 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. | |
152 | */ | |
153 | static int acpi_pm_pre_suspend(void) | |
154 | { | |
155 | acpi_pm_freeze(); | |
26fcaf60 | 156 | return suspend_nvs_save(); |
c5f7a1bb RW |
157 | } |
158 | ||
d8f3de0d RW |
159 | /** |
160 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
161 | * | |
162 | * If necessary, set the firmware waking vector and do arch-specific | |
163 | * nastiness to get the wakeup code to the waking vector. | |
164 | */ | |
165 | static int __acpi_pm_prepare(void) | |
166 | { | |
167 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
d8f3de0d RW |
168 | if (error) |
169 | acpi_target_sleep_state = ACPI_STATE_S0; | |
c5f7a1bb | 170 | |
d8f3de0d RW |
171 | return error; |
172 | } | |
173 | ||
174 | /** | |
175 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
176 | * state and disable the GPEs. | |
177 | */ | |
178 | static int acpi_pm_prepare(void) | |
179 | { | |
180 | int error = __acpi_pm_prepare(); | |
d8f3de0d | 181 | if (!error) |
26fcaf60 | 182 | error = acpi_pm_pre_suspend(); |
d5a64513 | 183 | |
d8f3de0d RW |
184 | return error; |
185 | } | |
186 | ||
187 | /** | |
188 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
189 | * | |
190 | * This is called after we wake back up (or if entering the sleep state | |
191 | * failed). | |
192 | */ | |
193 | static void acpi_pm_finish(void) | |
194 | { | |
195 | u32 acpi_state = acpi_target_sleep_state; | |
196 | ||
42de5532 | 197 | acpi_ec_unblock_transactions(); |
d551d81d | 198 | suspend_nvs_free(); |
2a6b6976 | 199 | |
d8f3de0d RW |
200 | if (acpi_state == ACPI_STATE_S0) |
201 | return; | |
1da177e4 | 202 | |
d8f3de0d RW |
203 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
204 | acpi_state); | |
78f5f023 | 205 | acpi_disable_wakeup_devices(acpi_state); |
d8f3de0d RW |
206 | acpi_leave_sleep_state(acpi_state); |
207 | ||
208 | /* reset firmware waking vector */ | |
209 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
210 | ||
211 | acpi_target_sleep_state = ACPI_STATE_S0; | |
212 | } | |
213 | ||
214 | /** | |
215 | * acpi_pm_end - Finish up suspend sequence. | |
216 | */ | |
217 | static void acpi_pm_end(void) | |
218 | { | |
219 | /* | |
220 | * This is necessary in case acpi_pm_finish() is not called during a | |
221 | * failing transition to a sleep state. | |
222 | */ | |
223 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 224 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 225 | } |
92daa7b5 RW |
226 | #else /* !CONFIG_ACPI_SLEEP */ |
227 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
5d1e072b | 228 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 229 | |
d8f3de0d | 230 | #ifdef CONFIG_SUSPEND |
1da177e4 | 231 | static u32 acpi_suspend_states[] = { |
e2a5b420 AS |
232 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
233 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
234 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 235 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
236 | }; |
237 | ||
e9b3aba8 | 238 | /** |
2c6e33c3 | 239 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
240 | * associated with given @pm_state, if supported. |
241 | */ | |
2c6e33c3 | 242 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
243 | { |
244 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
245 | int error = 0; | |
246 | ||
72ad5d77 | 247 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
2a6b6976 MG |
248 | if (error) |
249 | return error; | |
250 | ||
e9b3aba8 RW |
251 | if (sleep_states[acpi_state]) { |
252 | acpi_target_sleep_state = acpi_state; | |
e49f711c | 253 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
e9b3aba8 RW |
254 | } else { |
255 | printk(KERN_ERR "ACPI does not support this state: %d\n", | |
256 | pm_state); | |
257 | error = -ENOSYS; | |
258 | } | |
259 | return error; | |
260 | } | |
261 | ||
1da177e4 | 262 | /** |
2c6e33c3 | 263 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 264 | * @pm_state: ignored |
1da177e4 | 265 | * |
50ad147a RW |
266 | * Flush caches and go to sleep. For STR we have to call arch-specific |
267 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
268 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
269 | */ | |
2c6e33c3 | 270 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
271 | { |
272 | acpi_status status = AE_OK; | |
e9b3aba8 | 273 | u32 acpi_state = acpi_target_sleep_state; |
979f11b0 | 274 | int error; |
1da177e4 LT |
275 | |
276 | ACPI_FLUSH_CPU_CACHE(); | |
277 | ||
e9b3aba8 RW |
278 | switch (acpi_state) { |
279 | case ACPI_STATE_S1: | |
1da177e4 | 280 | barrier(); |
2a14e541 | 281 | status = acpi_enter_sleep_state(acpi_state, wake_sleep_flags); |
1da177e4 LT |
282 | break; |
283 | ||
e9b3aba8 | 284 | case ACPI_STATE_S3: |
f1a2003e | 285 | error = acpi_suspend_lowlevel(); |
979f11b0 RW |
286 | if (error) |
287 | return error; | |
7a63f08b | 288 | pr_info(PREFIX "Low-level resume complete\n"); |
1da177e4 | 289 | break; |
1da177e4 | 290 | } |
872d83d0 | 291 | |
b6dacf63 MG |
292 | /* This violates the spec but is required for bug compatibility. */ |
293 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); | |
65df7847 | 294 | |
c95d47a8 | 295 | /* Reprogram control registers and execute _BFS */ |
2a14e541 | 296 | acpi_leave_sleep_state_prep(acpi_state, wake_sleep_flags); |
c95d47a8 | 297 | |
23b168d4 | 298 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
299 | * of the OSPM to clear the status bit [ implying that the |
300 | * POWER_BUTTON event should not reach userspace ] | |
301 | */ | |
302 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) | |
303 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
304 | ||
a3627f67 SL |
305 | /* |
306 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
307 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
308 | * acpi_leave_sleep_state will reenable specific GPEs later | |
309 | */ | |
3d97e426 | 310 | acpi_disable_all_gpes(); |
d5a64513 | 311 | /* Allow EC transactions to happen. */ |
fe955682 | 312 | acpi_ec_unblock_transactions_early(); |
a3627f67 | 313 | |
2a6b6976 MG |
314 | suspend_nvs_restore(); |
315 | ||
1da177e4 LT |
316 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
317 | } | |
318 | ||
2c6e33c3 | 319 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 320 | { |
e8c9c502 | 321 | u32 acpi_state; |
eb9289eb | 322 | |
e8c9c502 JB |
323 | switch (pm_state) { |
324 | case PM_SUSPEND_ON: | |
325 | case PM_SUSPEND_STANDBY: | |
326 | case PM_SUSPEND_MEM: | |
327 | acpi_state = acpi_suspend_states[pm_state]; | |
328 | ||
329 | return sleep_states[acpi_state]; | |
330 | default: | |
331 | return 0; | |
332 | } | |
eb9289eb SL |
333 | } |
334 | ||
2f55ac07 | 335 | static const struct platform_suspend_ops acpi_suspend_ops = { |
2c6e33c3 LB |
336 | .valid = acpi_suspend_state_valid, |
337 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 338 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 339 | .enter = acpi_suspend_enter, |
618d7fd0 | 340 | .wake = acpi_pm_finish, |
d8f3de0d RW |
341 | .end = acpi_pm_end, |
342 | }; | |
343 | ||
344 | /** | |
345 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
346 | * state associated with given @pm_state, if supported, and | |
347 | * execute the _PTS control method. This function is used if the | |
348 | * pre-ACPI 2.0 suspend ordering has been requested. | |
349 | */ | |
350 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
351 | { | |
352 | int error = acpi_suspend_begin(pm_state); | |
d8f3de0d RW |
353 | if (!error) |
354 | error = __acpi_pm_prepare(); | |
c5f7a1bb | 355 | |
d8f3de0d RW |
356 | return error; |
357 | } | |
358 | ||
359 | /* | |
360 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
361 | * been requested. | |
362 | */ | |
2f55ac07 | 363 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
d8f3de0d RW |
364 | .valid = acpi_suspend_state_valid, |
365 | .begin = acpi_suspend_begin_old, | |
c5f7a1bb | 366 | .prepare_late = acpi_pm_pre_suspend, |
2c6e33c3 | 367 | .enter = acpi_suspend_enter, |
618d7fd0 | 368 | .wake = acpi_pm_finish, |
d8f3de0d RW |
369 | .end = acpi_pm_end, |
370 | .recover = acpi_pm_finish, | |
1da177e4 | 371 | }; |
e41fb7c5 CC |
372 | |
373 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) | |
374 | { | |
375 | old_suspend_ordering = true; | |
376 | return 0; | |
377 | } | |
378 | ||
53998648 RW |
379 | static int __init init_nvs_nosave(const struct dmi_system_id *d) |
380 | { | |
381 | acpi_nvs_nosave(); | |
382 | return 0; | |
383 | } | |
384 | ||
e41fb7c5 CC |
385 | static struct dmi_system_id __initdata acpisleep_dmi_table[] = { |
386 | { | |
387 | .callback = init_old_suspend_ordering, | |
388 | .ident = "Abit KN9 (nForce4 variant)", | |
389 | .matches = { | |
390 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
391 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
392 | }, | |
393 | }, | |
4fb507b6 RW |
394 | { |
395 | .callback = init_old_suspend_ordering, | |
396 | .ident = "HP xw4600 Workstation", | |
397 | .matches = { | |
398 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
399 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
400 | }, | |
401 | }, | |
65df7847 | 402 | { |
a1404495 AW |
403 | .callback = init_old_suspend_ordering, |
404 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
405 | .matches = { | |
406 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
407 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
408 | }, | |
409 | }, | |
45e77988 | 410 | { |
2a9ef8e1 ZY |
411 | .callback = init_old_suspend_ordering, |
412 | .ident = "Panasonic CF51-2L", | |
413 | .matches = { | |
414 | DMI_MATCH(DMI_BOARD_VENDOR, | |
415 | "Matsushita Electric Industrial Co.,Ltd."), | |
416 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
417 | }, | |
418 | }, | |
53998648 RW |
419 | { |
420 | .callback = init_nvs_nosave, | |
d11c78e9 DJ |
421 | .ident = "Sony Vaio VGN-FW21E", |
422 | .matches = { | |
423 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
424 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), | |
425 | }, | |
426 | }, | |
427 | { | |
428 | .callback = init_nvs_nosave, | |
ddf6ce45 DJ |
429 | .ident = "Sony Vaio VPCEB17FX", |
430 | .matches = { | |
431 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
432 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), | |
433 | }, | |
434 | }, | |
435 | { | |
436 | .callback = init_nvs_nosave, | |
53998648 RW |
437 | .ident = "Sony Vaio VGN-SR11M", |
438 | .matches = { | |
439 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
440 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), | |
441 | }, | |
442 | }, | |
443 | { | |
444 | .callback = init_nvs_nosave, | |
445 | .ident = "Everex StepNote Series", | |
446 | .matches = { | |
447 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), | |
448 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), | |
449 | }, | |
450 | }, | |
af48931c RW |
451 | { |
452 | .callback = init_nvs_nosave, | |
453 | .ident = "Sony Vaio VPCEB1Z1E", | |
454 | .matches = { | |
455 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
456 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), | |
457 | }, | |
458 | }, | |
291a73c9 RW |
459 | { |
460 | .callback = init_nvs_nosave, | |
461 | .ident = "Sony Vaio VGN-NW130D", | |
462 | .matches = { | |
463 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
464 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), | |
465 | }, | |
466 | }, | |
7b330707 RW |
467 | { |
468 | .callback = init_nvs_nosave, | |
93f77084 LT |
469 | .ident = "Sony Vaio VPCCW29FX", |
470 | .matches = { | |
471 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
472 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), | |
473 | }, | |
474 | }, | |
475 | { | |
476 | .callback = init_nvs_nosave, | |
7b330707 RW |
477 | .ident = "Averatec AV1020-ED2", |
478 | .matches = { | |
479 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), | |
480 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), | |
481 | }, | |
482 | }, | |
bb0c5ed6 ZR |
483 | { |
484 | .callback = init_old_suspend_ordering, | |
485 | .ident = "Asus A8N-SLI DELUXE", | |
486 | .matches = { | |
487 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
488 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), | |
489 | }, | |
490 | }, | |
491 | { | |
492 | .callback = init_old_suspend_ordering, | |
493 | .ident = "Asus A8N-SLI Premium", | |
494 | .matches = { | |
495 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), | |
496 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), | |
497 | }, | |
498 | }, | |
89e8ea12 RW |
499 | { |
500 | .callback = init_nvs_nosave, | |
501 | .ident = "Sony Vaio VGN-SR26GN_P", | |
502 | .matches = { | |
503 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
504 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), | |
505 | }, | |
506 | }, | |
731b25a4 BR |
507 | { |
508 | .callback = init_nvs_nosave, | |
509 | .ident = "Sony Vaio VGN-FW520F", | |
510 | .matches = { | |
511 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), | |
512 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), | |
513 | }, | |
514 | }, | |
5a50a7c3 KYL |
515 | { |
516 | .callback = init_nvs_nosave, | |
517 | .ident = "Asus K54C", | |
518 | .matches = { | |
519 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
520 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), | |
521 | }, | |
522 | }, | |
523 | { | |
524 | .callback = init_nvs_nosave, | |
525 | .ident = "Asus K54HR", | |
526 | .matches = { | |
527 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), | |
528 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), | |
529 | }, | |
530 | }, | |
e41fb7c5 CC |
531 | {}, |
532 | }; | |
296699de RW |
533 | #endif /* CONFIG_SUSPEND */ |
534 | ||
b0cb1a19 | 535 | #ifdef CONFIG_HIBERNATION |
bdfe6b7c SL |
536 | static unsigned long s4_hardware_signature; |
537 | static struct acpi_table_facs *facs; | |
538 | static bool nosigcheck; | |
539 | ||
540 | void __init acpi_no_s4_hw_signature(void) | |
541 | { | |
542 | nosigcheck = true; | |
543 | } | |
544 | ||
caea99ef | 545 | static int acpi_hibernation_begin(void) |
74f270af | 546 | { |
3f4b0ef7 RW |
547 | int error; |
548 | ||
72ad5d77 | 549 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
3f4b0ef7 RW |
550 | if (!error) { |
551 | acpi_target_sleep_state = ACPI_STATE_S4; | |
552 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
553 | } | |
554 | ||
555 | return error; | |
556 | } | |
557 | ||
a3d25c27 RW |
558 | static int acpi_hibernation_enter(void) |
559 | { | |
560 | acpi_status status = AE_OK; | |
a3d25c27 RW |
561 | |
562 | ACPI_FLUSH_CPU_CACHE(); | |
563 | ||
a3d25c27 | 564 | /* This shouldn't return. If it returns, we have a problem */ |
2a14e541 | 565 | status = acpi_enter_sleep_state(ACPI_STATE_S4, wake_sleep_flags); |
c95d47a8 | 566 | /* Reprogram control registers and execute _BFS */ |
2a14e541 | 567 | acpi_leave_sleep_state_prep(ACPI_STATE_S4, wake_sleep_flags); |
a3d25c27 RW |
568 | |
569 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
570 | } | |
571 | ||
c7e0831d RW |
572 | static void acpi_hibernation_leave(void) |
573 | { | |
574 | /* | |
575 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
576 | * enable it here. | |
577 | */ | |
578 | acpi_enable(); | |
c95d47a8 | 579 | /* Reprogram control registers and execute _BFS */ |
2a14e541 | 580 | acpi_leave_sleep_state_prep(ACPI_STATE_S4, wake_sleep_flags); |
bdfe6b7c SL |
581 | /* Check the hardware signature */ |
582 | if (facs && s4_hardware_signature != facs->hardware_signature) { | |
583 | printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " | |
584 | "cannot resume!\n"); | |
585 | panic("ACPI S4 hardware signature mismatch"); | |
586 | } | |
3f4b0ef7 | 587 | /* Restore the NVS memory area */ |
dd4c4f17 | 588 | suspend_nvs_restore(); |
d5a64513 | 589 | /* Allow EC transactions to happen. */ |
fe955682 | 590 | acpi_ec_unblock_transactions_early(); |
c7e0831d RW |
591 | } |
592 | ||
d5a64513 | 593 | static void acpi_pm_thaw(void) |
f6bb13aa | 594 | { |
fe955682 | 595 | acpi_ec_unblock_transactions(); |
3d97e426 | 596 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
597 | } |
598 | ||
073ef1f6 | 599 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
d8f3de0d RW |
600 | .begin = acpi_hibernation_begin, |
601 | .end = acpi_pm_end, | |
c5f7a1bb | 602 | .pre_snapshot = acpi_pm_prepare, |
2a6b6976 | 603 | .finish = acpi_pm_finish, |
d8f3de0d RW |
604 | .prepare = acpi_pm_prepare, |
605 | .enter = acpi_hibernation_enter, | |
606 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
607 | .pre_restore = acpi_pm_freeze, |
608 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 609 | }; |
caea99ef | 610 | |
d8f3de0d RW |
611 | /** |
612 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
613 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
614 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
615 | * requested. | |
616 | */ | |
617 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 618 | { |
e49f711c ZY |
619 | int error; |
620 | /* | |
621 | * The _TTS object should always be evaluated before the _PTS object. | |
622 | * When the old_suspended_ordering is true, the _PTS object is | |
623 | * evaluated in the acpi_sleep_prepare. | |
624 | */ | |
625 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
626 | ||
627 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 628 | |
3f4b0ef7 | 629 | if (!error) { |
72ad5d77 | 630 | if (!nvs_nosave) |
dd4c4f17 | 631 | error = suspend_nvs_alloc(); |
3f4b0ef7 RW |
632 | if (!error) |
633 | acpi_target_sleep_state = ACPI_STATE_S4; | |
634 | } | |
635 | return error; | |
636 | } | |
637 | ||
d8f3de0d RW |
638 | /* |
639 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
640 | * been requested. | |
641 | */ | |
073ef1f6 | 642 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
d8f3de0d RW |
643 | .begin = acpi_hibernation_begin_old, |
644 | .end = acpi_pm_end, | |
c5f7a1bb | 645 | .pre_snapshot = acpi_pm_pre_suspend, |
d5a64513 | 646 | .prepare = acpi_pm_freeze, |
2a6b6976 | 647 | .finish = acpi_pm_finish, |
a3d25c27 | 648 | .enter = acpi_hibernation_enter, |
c7e0831d | 649 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
650 | .pre_restore = acpi_pm_freeze, |
651 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 652 | .recover = acpi_pm_finish, |
a3d25c27 | 653 | }; |
d8f3de0d | 654 | #endif /* CONFIG_HIBERNATION */ |
a3d25c27 | 655 | |
296699de RW |
656 | int acpi_suspend(u32 acpi_state) |
657 | { | |
658 | suspend_state_t states[] = { | |
659 | [1] = PM_SUSPEND_STANDBY, | |
660 | [3] = PM_SUSPEND_MEM, | |
661 | [5] = PM_SUSPEND_MAX | |
662 | }; | |
663 | ||
664 | if (acpi_state < 6 && states[acpi_state]) | |
665 | return pm_suspend(states[acpi_state]); | |
666 | if (acpi_state == 4) | |
667 | return hibernate(); | |
668 | return -EINVAL; | |
669 | } | |
670 | ||
aa338601 | 671 | #ifdef CONFIG_PM |
fd4aff1a SL |
672 | /** |
673 | * acpi_pm_device_sleep_state - return preferred power state of ACPI device | |
674 | * in the system sleep state given by %acpi_target_sleep_state | |
2fe2de5f DB |
675 | * @dev: device to examine; its driver model wakeup flags control |
676 | * whether it should be able to wake up the system | |
fd4aff1a SL |
677 | * @d_min_p: used to store the upper limit of allowed states range |
678 | * Return value: preferred power state of the device on success, -ENODEV on | |
679 | * failure (ie. if there's no 'struct acpi_device' for @dev) | |
680 | * | |
681 | * Find the lowest power (highest number) ACPI device power state that | |
682 | * device @dev can be in while the system is in the sleep state represented | |
683 | * by %acpi_target_sleep_state. If @wake is nonzero, the device should be | |
684 | * able to wake up the system from this sleep state. If @d_min_p is set, | |
685 | * the highest power (lowest number) device power state of @dev allowed | |
686 | * in this system sleep state is stored at the location pointed to by it. | |
687 | * | |
688 | * The caller must ensure that @dev is valid before using this function. | |
689 | * The caller is also responsible for figuring out if the device is | |
690 | * supposed to be able to wake up the system and passing this information | |
691 | * via @wake. | |
692 | */ | |
693 | ||
2fe2de5f | 694 | int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p) |
fd4aff1a SL |
695 | { |
696 | acpi_handle handle = DEVICE_ACPI_HANDLE(dev); | |
697 | struct acpi_device *adev; | |
698 | char acpi_method[] = "_SxD"; | |
27663c58 | 699 | unsigned long long d_min, d_max; |
fd4aff1a SL |
700 | |
701 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
ead77594 | 702 | printk(KERN_DEBUG "ACPI handle has no context!\n"); |
fd4aff1a SL |
703 | return -ENODEV; |
704 | } | |
705 | ||
706 | acpi_method[2] = '0' + acpi_target_sleep_state; | |
707 | /* | |
708 | * If the sleep state is S0, we will return D3, but if the device has | |
709 | * _S0W, we will use the value from _S0W | |
710 | */ | |
711 | d_min = ACPI_STATE_D0; | |
712 | d_max = ACPI_STATE_D3; | |
713 | ||
714 | /* | |
715 | * If present, _SxD methods return the minimum D-state (highest power | |
716 | * state) we can use for the corresponding S-states. Otherwise, the | |
717 | * minimum D-state is D0 (ACPI 3.x). | |
718 | * | |
719 | * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer | |
720 | * provided -- that's our fault recovery, we ignore retval. | |
721 | */ | |
722 | if (acpi_target_sleep_state > ACPI_STATE_S0) | |
723 | acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); | |
724 | ||
725 | /* | |
726 | * If _PRW says we can wake up the system from the target sleep state, | |
727 | * the D-state returned by _SxD is sufficient for that (we assume a | |
728 | * wakeup-aware driver if wake is set). Still, if _SxW exists | |
729 | * (ACPI 3.x), it should return the maximum (lowest power) D-state that | |
730 | * can wake the system. _S0W may be valid, too. | |
731 | */ | |
732 | if (acpi_target_sleep_state == ACPI_STATE_S0 || | |
761afb86 | 733 | (device_may_wakeup(dev) && |
fd4aff1a | 734 | adev->wakeup.sleep_state <= acpi_target_sleep_state)) { |
ad3399c3 RW |
735 | acpi_status status; |
736 | ||
fd4aff1a | 737 | acpi_method[3] = 'W'; |
ad3399c3 RW |
738 | status = acpi_evaluate_integer(handle, acpi_method, NULL, |
739 | &d_max); | |
740 | if (ACPI_FAILURE(status)) { | |
761afb86 RW |
741 | if (acpi_target_sleep_state != ACPI_STATE_S0 || |
742 | status != AE_NOT_FOUND) | |
743 | d_max = d_min; | |
ad3399c3 RW |
744 | } else if (d_max < d_min) { |
745 | /* Warn the user of the broken DSDT */ | |
746 | printk(KERN_WARNING "ACPI: Wrong value from %s\n", | |
747 | acpi_method); | |
748 | /* Sanitize it */ | |
fd4aff1a | 749 | d_min = d_max; |
ad3399c3 | 750 | } |
fd4aff1a SL |
751 | } |
752 | ||
753 | if (d_min_p) | |
754 | *d_min_p = d_min; | |
755 | return d_max; | |
756 | } | |
aa338601 | 757 | #endif /* CONFIG_PM */ |
eb9d0fe4 | 758 | |
761afb86 | 759 | #ifdef CONFIG_PM_SLEEP |
b24e5098 LM |
760 | /** |
761 | * acpi_pm_device_run_wake - Enable/disable wake-up for given device. | |
762 | * @phys_dev: Device to enable/disable the platform to wake-up the system for. | |
763 | * @enable: Whether enable or disable the wake-up functionality. | |
764 | * | |
765 | * Find the ACPI device object corresponding to @pci_dev and try to | |
766 | * enable/disable the GPE associated with it. | |
767 | */ | |
768 | int acpi_pm_device_run_wake(struct device *phys_dev, bool enable) | |
769 | { | |
770 | struct acpi_device *dev; | |
771 | acpi_handle handle; | |
772 | ||
773 | if (!device_run_wake(phys_dev)) | |
774 | return -EINVAL; | |
775 | ||
776 | handle = DEVICE_ACPI_HANDLE(phys_dev); | |
777 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &dev))) { | |
778 | dev_dbg(phys_dev, "ACPI handle has no context in %s!\n", | |
779 | __func__); | |
780 | return -ENODEV; | |
781 | } | |
782 | ||
783 | if (enable) { | |
784 | acpi_enable_wakeup_device_power(dev, ACPI_STATE_S0); | |
785 | acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number); | |
786 | } else { | |
787 | acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number); | |
788 | acpi_disable_wakeup_device_power(dev); | |
789 | } | |
790 | ||
791 | return 0; | |
792 | } | |
793 | ||
eb9d0fe4 RW |
794 | /** |
795 | * acpi_pm_device_sleep_wake - enable or disable the system wake-up | |
796 | * capability of given device | |
797 | * @dev: device to handle | |
798 | * @enable: 'true' - enable, 'false' - disable the wake-up capability | |
799 | */ | |
800 | int acpi_pm_device_sleep_wake(struct device *dev, bool enable) | |
801 | { | |
802 | acpi_handle handle; | |
803 | struct acpi_device *adev; | |
df8db91f | 804 | int error; |
eb9d0fe4 | 805 | |
0baed8da | 806 | if (!device_can_wakeup(dev)) |
eb9d0fe4 RW |
807 | return -EINVAL; |
808 | ||
809 | handle = DEVICE_ACPI_HANDLE(dev); | |
810 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
df8db91f | 811 | dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__); |
eb9d0fe4 RW |
812 | return -ENODEV; |
813 | } | |
814 | ||
e8b6f970 RW |
815 | error = enable ? |
816 | acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) : | |
817 | acpi_disable_wakeup_device_power(adev); | |
df8db91f RW |
818 | if (!error) |
819 | dev_info(dev, "wake-up capability %s by ACPI\n", | |
820 | enable ? "enabled" : "disabled"); | |
821 | ||
822 | return error; | |
eb9d0fe4 | 823 | } |
761afb86 | 824 | #endif /* CONFIG_PM_SLEEP */ |
fd4aff1a | 825 | |
f216cc37 AS |
826 | static void acpi_power_off_prepare(void) |
827 | { | |
828 | /* Prepare to power off the system */ | |
829 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 830 | acpi_disable_all_gpes(); |
f216cc37 AS |
831 | } |
832 | ||
833 | static void acpi_power_off(void) | |
834 | { | |
835 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 836 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 837 | local_irq_disable(); |
2a14e541 | 838 | acpi_enter_sleep_state(ACPI_STATE_S5, wake_sleep_flags); |
f216cc37 AS |
839 | } |
840 | ||
96f15efc LB |
841 | /* |
842 | * ACPI 2.0 created the optional _GTS and _BFS, | |
843 | * but industry adoption has been neither rapid nor broad. | |
844 | * | |
845 | * Linux gets into trouble when it executes poorly validated | |
846 | * paths through the BIOS, so disable _GTS and _BFS by default, | |
847 | * but do speak up and offer the option to enable them. | |
848 | */ | |
01eac60b | 849 | static void __init acpi_gts_bfs_check(void) |
96f15efc LB |
850 | { |
851 | acpi_handle dummy; | |
852 | ||
4efeeecd | 853 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_PATHNAME__GTS, &dummy))) |
96f15efc LB |
854 | { |
855 | printk(KERN_NOTICE PREFIX "BIOS offers _GTS\n"); | |
856 | printk(KERN_NOTICE PREFIX "If \"acpi.gts=1\" improves suspend, " | |
857 | "please notify linux-acpi@vger.kernel.org\n"); | |
858 | } | |
4efeeecd | 859 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_PATHNAME__BFS, &dummy))) |
96f15efc LB |
860 | { |
861 | printk(KERN_NOTICE PREFIX "BIOS offers _BFS\n"); | |
862 | printk(KERN_NOTICE PREFIX "If \"acpi.bfs=1\" improves resume, " | |
863 | "please notify linux-acpi@vger.kernel.org\n"); | |
864 | } | |
865 | } | |
866 | ||
aafbcd16 | 867 | int __init acpi_sleep_init(void) |
1da177e4 | 868 | { |
296699de RW |
869 | acpi_status status; |
870 | u8 type_a, type_b; | |
871 | #ifdef CONFIG_SUSPEND | |
e2a5b420 | 872 | int i = 0; |
e41fb7c5 CC |
873 | |
874 | dmi_check_system(acpisleep_dmi_table); | |
296699de | 875 | #endif |
1da177e4 LT |
876 | |
877 | if (acpi_disabled) | |
878 | return 0; | |
879 | ||
5a50fe70 FP |
880 | sleep_states[ACPI_STATE_S0] = 1; |
881 | printk(KERN_INFO PREFIX "(supports S0"); | |
882 | ||
296699de | 883 | #ifdef CONFIG_SUSPEND |
5a50fe70 | 884 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { |
1da177e4 LT |
885 | status = acpi_get_sleep_type_data(i, &type_a, &type_b); |
886 | if (ACPI_SUCCESS(status)) { | |
887 | sleep_states[i] = 1; | |
be96447e | 888 | printk(KERN_CONT " S%d", i); |
1da177e4 | 889 | } |
1da177e4 | 890 | } |
1da177e4 | 891 | |
d8f3de0d RW |
892 | suspend_set_ops(old_suspend_ordering ? |
893 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
296699de | 894 | #endif |
a3d25c27 | 895 | |
b0cb1a19 | 896 | #ifdef CONFIG_HIBERNATION |
296699de RW |
897 | status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); |
898 | if (ACPI_SUCCESS(status)) { | |
d8f3de0d RW |
899 | hibernation_set_ops(old_suspend_ordering ? |
900 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
296699de | 901 | sleep_states[ACPI_STATE_S4] = 1; |
be96447e | 902 | printk(KERN_CONT " S4"); |
bdfe6b7c | 903 | if (!nosigcheck) { |
3d97e426 | 904 | acpi_get_table(ACPI_SIG_FACS, 1, |
bdfe6b7c SL |
905 | (struct acpi_table_header **)&facs); |
906 | if (facs) | |
907 | s4_hardware_signature = | |
908 | facs->hardware_signature; | |
909 | } | |
296699de | 910 | } |
a3d25c27 | 911 | #endif |
f216cc37 AS |
912 | status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
913 | if (ACPI_SUCCESS(status)) { | |
914 | sleep_states[ACPI_STATE_S5] = 1; | |
be96447e | 915 | printk(KERN_CONT " S5"); |
f216cc37 AS |
916 | pm_power_off_prepare = acpi_power_off_prepare; |
917 | pm_power_off = acpi_power_off; | |
918 | } | |
be96447e | 919 | printk(KERN_CONT ")\n"); |
e49f711c ZY |
920 | /* |
921 | * Register the tts_notifier to reboot notifier list so that the _TTS | |
922 | * object can also be evaluated when the system enters S5. | |
923 | */ | |
924 | register_reboot_notifier(&tts_notifier); | |
96f15efc | 925 | acpi_gts_bfs_check(); |
1da177e4 LT |
926 | return 0; |
927 | } |