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1da177e4 LT |
1 | /* |
2 | * sleep.c - ACPI sleep support. | |
3 | * | |
e2a5b420 | 4 | * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> |
1da177e4 LT |
5 | * Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com> |
6 | * Copyright (c) 2000-2003 Patrick Mochel | |
7 | * Copyright (c) 2003 Open Source Development Lab | |
8 | * | |
9 | * This file is released under the GPLv2. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/delay.h> | |
14 | #include <linux/irq.h> | |
15 | #include <linux/dmi.h> | |
16 | #include <linux/device.h> | |
17 | #include <linux/suspend.h> | |
e49f711c | 18 | #include <linux/reboot.h> |
f216cc37 AS |
19 | |
20 | #include <asm/io.h> | |
21 | ||
1da177e4 LT |
22 | #include <acpi/acpi_bus.h> |
23 | #include <acpi/acpi_drivers.h> | |
e60cc7a6 BH |
24 | |
25 | #include "internal.h" | |
1da177e4 LT |
26 | #include "sleep.h" |
27 | ||
28 | u8 sleep_states[ACPI_S_STATE_COUNT]; | |
29 | ||
e49f711c ZY |
30 | static void acpi_sleep_tts_switch(u32 acpi_state) |
31 | { | |
32 | union acpi_object in_arg = { ACPI_TYPE_INTEGER }; | |
33 | struct acpi_object_list arg_list = { 1, &in_arg }; | |
34 | acpi_status status = AE_OK; | |
35 | ||
36 | in_arg.integer.value = acpi_state; | |
37 | status = acpi_evaluate_object(NULL, "\\_TTS", &arg_list, NULL); | |
38 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
39 | /* | |
40 | * OS can't evaluate the _TTS object correctly. Some warning | |
41 | * message will be printed. But it won't break anything. | |
42 | */ | |
43 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); | |
44 | } | |
45 | } | |
46 | ||
47 | static int tts_notify_reboot(struct notifier_block *this, | |
48 | unsigned long code, void *x) | |
49 | { | |
50 | acpi_sleep_tts_switch(ACPI_STATE_S5); | |
51 | return NOTIFY_DONE; | |
52 | } | |
53 | ||
54 | static struct notifier_block tts_notifier = { | |
55 | .notifier_call = tts_notify_reboot, | |
56 | .next = NULL, | |
57 | .priority = 0, | |
58 | }; | |
59 | ||
c9b6c8f6 | 60 | static int acpi_sleep_prepare(u32 acpi_state) |
2f3f2226 AS |
61 | { |
62 | #ifdef CONFIG_ACPI_SLEEP | |
63 | /* do we have a wakeup address for S2 and S3? */ | |
64 | if (acpi_state == ACPI_STATE_S3) { | |
65 | if (!acpi_wakeup_address) { | |
66 | return -EFAULT; | |
67 | } | |
4b4f7280 PA |
68 | acpi_set_firmware_waking_vector( |
69 | (acpi_physical_address)acpi_wakeup_address); | |
2f3f2226 AS |
70 | |
71 | } | |
72 | ACPI_FLUSH_CPU_CACHE(); | |
73 | acpi_enable_wakeup_device_prep(acpi_state); | |
74 | #endif | |
c9b6c8f6 RW |
75 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
76 | acpi_state); | |
2f3f2226 AS |
77 | acpi_enter_sleep_state_prep(acpi_state); |
78 | return 0; | |
79 | } | |
80 | ||
5d1e072b | 81 | #ifdef CONFIG_ACPI_SLEEP |
b849075c | 82 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
d7f0eea9 ZR |
83 | /* |
84 | * According to the ACPI specification the BIOS should make sure that ACPI is | |
85 | * enabled and SCI_EN bit is set on wake-up from S1 - S3 sleep states. Still, | |
86 | * some BIOSes don't do that and therefore we use acpi_enable() to enable ACPI | |
87 | * on such systems during resume. Unfortunately that doesn't help in | |
88 | * particularly pathological cases in which SCI_EN has to be set directly on | |
89 | * resume, although the specification states very clearly that this flag is | |
90 | * owned by the hardware. The set_sci_en_on_resume variable will be set in such | |
91 | * cases. | |
92 | */ | |
93 | static bool set_sci_en_on_resume; | |
94 | ||
95 | void __init acpi_set_sci_en_on_resume(void) | |
96 | { | |
97 | set_sci_en_on_resume = true; | |
98 | } | |
99 | ||
d8f3de0d RW |
100 | /* |
101 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the | |
102 | * user to request that behavior by using the 'acpi_old_suspend_ordering' | |
103 | * kernel command line option that causes the following variable to be set. | |
104 | */ | |
105 | static bool old_suspend_ordering; | |
106 | ||
107 | void __init acpi_old_suspend_ordering(void) | |
108 | { | |
109 | old_suspend_ordering = true; | |
110 | } | |
111 | ||
112 | /** | |
d5a64513 | 113 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
d8f3de0d | 114 | */ |
d5a64513 | 115 | static int acpi_pm_freeze(void) |
d8f3de0d | 116 | { |
3d97e426 | 117 | acpi_disable_all_gpes(); |
d5a64513 RW |
118 | acpi_os_wait_events_complete(NULL); |
119 | acpi_ec_suspend_transactions(); | |
d8f3de0d RW |
120 | return 0; |
121 | } | |
122 | ||
123 | /** | |
124 | * __acpi_pm_prepare - Prepare the platform to enter the target state. | |
125 | * | |
126 | * If necessary, set the firmware waking vector and do arch-specific | |
127 | * nastiness to get the wakeup code to the waking vector. | |
128 | */ | |
129 | static int __acpi_pm_prepare(void) | |
130 | { | |
131 | int error = acpi_sleep_prepare(acpi_target_sleep_state); | |
132 | ||
133 | if (error) | |
134 | acpi_target_sleep_state = ACPI_STATE_S0; | |
135 | return error; | |
136 | } | |
137 | ||
138 | /** | |
139 | * acpi_pm_prepare - Prepare the platform to enter the target sleep | |
140 | * state and disable the GPEs. | |
141 | */ | |
142 | static int acpi_pm_prepare(void) | |
143 | { | |
144 | int error = __acpi_pm_prepare(); | |
145 | ||
146 | if (!error) | |
d5a64513 RW |
147 | acpi_pm_freeze(); |
148 | ||
d8f3de0d RW |
149 | return error; |
150 | } | |
151 | ||
152 | /** | |
153 | * acpi_pm_finish - Instruct the platform to leave a sleep state. | |
154 | * | |
155 | * This is called after we wake back up (or if entering the sleep state | |
156 | * failed). | |
157 | */ | |
158 | static void acpi_pm_finish(void) | |
159 | { | |
160 | u32 acpi_state = acpi_target_sleep_state; | |
161 | ||
162 | if (acpi_state == ACPI_STATE_S0) | |
163 | return; | |
1da177e4 | 164 | |
d8f3de0d RW |
165 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
166 | acpi_state); | |
167 | acpi_disable_wakeup_device(acpi_state); | |
168 | acpi_leave_sleep_state(acpi_state); | |
169 | ||
170 | /* reset firmware waking vector */ | |
171 | acpi_set_firmware_waking_vector((acpi_physical_address) 0); | |
172 | ||
173 | acpi_target_sleep_state = ACPI_STATE_S0; | |
174 | } | |
175 | ||
176 | /** | |
177 | * acpi_pm_end - Finish up suspend sequence. | |
178 | */ | |
179 | static void acpi_pm_end(void) | |
180 | { | |
181 | /* | |
182 | * This is necessary in case acpi_pm_finish() is not called during a | |
183 | * failing transition to a sleep state. | |
184 | */ | |
185 | acpi_target_sleep_state = ACPI_STATE_S0; | |
e49f711c | 186 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
d8f3de0d | 187 | } |
92daa7b5 RW |
188 | #else /* !CONFIG_ACPI_SLEEP */ |
189 | #define acpi_target_sleep_state ACPI_STATE_S0 | |
5d1e072b | 190 | #endif /* CONFIG_ACPI_SLEEP */ |
1da177e4 | 191 | |
d8f3de0d | 192 | #ifdef CONFIG_SUSPEND |
1da177e4 LT |
193 | extern void do_suspend_lowlevel(void); |
194 | ||
195 | static u32 acpi_suspend_states[] = { | |
e2a5b420 AS |
196 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
197 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, | |
198 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, | |
e2a5b420 | 199 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
1da177e4 LT |
200 | }; |
201 | ||
e9b3aba8 | 202 | /** |
2c6e33c3 | 203 | * acpi_suspend_begin - Set the target system sleep state to the state |
e9b3aba8 RW |
204 | * associated with given @pm_state, if supported. |
205 | */ | |
2c6e33c3 | 206 | static int acpi_suspend_begin(suspend_state_t pm_state) |
e9b3aba8 RW |
207 | { |
208 | u32 acpi_state = acpi_suspend_states[pm_state]; | |
209 | int error = 0; | |
210 | ||
211 | if (sleep_states[acpi_state]) { | |
212 | acpi_target_sleep_state = acpi_state; | |
e49f711c | 213 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
e9b3aba8 RW |
214 | } else { |
215 | printk(KERN_ERR "ACPI does not support this state: %d\n", | |
216 | pm_state); | |
217 | error = -ENOSYS; | |
218 | } | |
219 | return error; | |
220 | } | |
221 | ||
1da177e4 | 222 | /** |
2c6e33c3 | 223 | * acpi_suspend_enter - Actually enter a sleep state. |
e9b3aba8 | 224 | * @pm_state: ignored |
1da177e4 | 225 | * |
50ad147a RW |
226 | * Flush caches and go to sleep. For STR we have to call arch-specific |
227 | * assembly, which in turn call acpi_enter_sleep_state(). | |
1da177e4 LT |
228 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
229 | */ | |
2c6e33c3 | 230 | static int acpi_suspend_enter(suspend_state_t pm_state) |
1da177e4 LT |
231 | { |
232 | acpi_status status = AE_OK; | |
233 | unsigned long flags = 0; | |
e9b3aba8 | 234 | u32 acpi_state = acpi_target_sleep_state; |
1da177e4 LT |
235 | |
236 | ACPI_FLUSH_CPU_CACHE(); | |
237 | ||
238 | /* Do arch specific saving of state. */ | |
50ad147a | 239 | if (acpi_state == ACPI_STATE_S3) { |
1da177e4 | 240 | int error = acpi_save_state_mem(); |
e9b3aba8 | 241 | |
60417f59 | 242 | if (error) |
1da177e4 LT |
243 | return error; |
244 | } | |
245 | ||
1da177e4 LT |
246 | local_irq_save(flags); |
247 | acpi_enable_wakeup_device(acpi_state); | |
e9b3aba8 RW |
248 | switch (acpi_state) { |
249 | case ACPI_STATE_S1: | |
1da177e4 LT |
250 | barrier(); |
251 | status = acpi_enter_sleep_state(acpi_state); | |
252 | break; | |
253 | ||
e9b3aba8 | 254 | case ACPI_STATE_S3: |
1da177e4 LT |
255 | do_suspend_lowlevel(); |
256 | break; | |
1da177e4 | 257 | } |
872d83d0 | 258 | |
d0c71fe7 | 259 | /* If ACPI is not enabled by the BIOS, we need to enable it here. */ |
65df7847 | 260 | if (set_sci_en_on_resume) |
50ffba1b | 261 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); |
65df7847 RW |
262 | else |
263 | acpi_enable(); | |
264 | ||
c95d47a8 RW |
265 | /* Reprogram control registers and execute _BFS */ |
266 | acpi_leave_sleep_state_prep(acpi_state); | |
267 | ||
23b168d4 | 268 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
872d83d0 AP |
269 | * of the OSPM to clear the status bit [ implying that the |
270 | * POWER_BUTTON event should not reach userspace ] | |
271 | */ | |
272 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) | |
273 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); | |
274 | ||
a3627f67 SL |
275 | /* |
276 | * Disable and clear GPE status before interrupt is enabled. Some GPEs | |
277 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. | |
278 | * acpi_leave_sleep_state will reenable specific GPEs later | |
279 | */ | |
3d97e426 | 280 | acpi_disable_all_gpes(); |
d5a64513 RW |
281 | /* Allow EC transactions to happen. */ |
282 | acpi_ec_resume_transactions_early(); | |
a3627f67 | 283 | |
1da177e4 LT |
284 | local_irq_restore(flags); |
285 | printk(KERN_DEBUG "Back to C!\n"); | |
286 | ||
e9b3aba8 | 287 | /* restore processor state */ |
50ad147a | 288 | if (acpi_state == ACPI_STATE_S3) |
1da177e4 LT |
289 | acpi_restore_state_mem(); |
290 | ||
1da177e4 LT |
291 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
292 | } | |
293 | ||
d5a64513 RW |
294 | static void acpi_suspend_finish(void) |
295 | { | |
296 | acpi_ec_resume_transactions(); | |
297 | acpi_pm_finish(); | |
298 | } | |
299 | ||
2c6e33c3 | 300 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
eb9289eb | 301 | { |
e8c9c502 | 302 | u32 acpi_state; |
eb9289eb | 303 | |
e8c9c502 JB |
304 | switch (pm_state) { |
305 | case PM_SUSPEND_ON: | |
306 | case PM_SUSPEND_STANDBY: | |
307 | case PM_SUSPEND_MEM: | |
308 | acpi_state = acpi_suspend_states[pm_state]; | |
309 | ||
310 | return sleep_states[acpi_state]; | |
311 | default: | |
312 | return 0; | |
313 | } | |
eb9289eb SL |
314 | } |
315 | ||
2c6e33c3 LB |
316 | static struct platform_suspend_ops acpi_suspend_ops = { |
317 | .valid = acpi_suspend_state_valid, | |
318 | .begin = acpi_suspend_begin, | |
6a7c7eaf | 319 | .prepare_late = acpi_pm_prepare, |
2c6e33c3 | 320 | .enter = acpi_suspend_enter, |
d5a64513 | 321 | .wake = acpi_suspend_finish, |
d8f3de0d RW |
322 | .end = acpi_pm_end, |
323 | }; | |
324 | ||
325 | /** | |
326 | * acpi_suspend_begin_old - Set the target system sleep state to the | |
327 | * state associated with given @pm_state, if supported, and | |
328 | * execute the _PTS control method. This function is used if the | |
329 | * pre-ACPI 2.0 suspend ordering has been requested. | |
330 | */ | |
331 | static int acpi_suspend_begin_old(suspend_state_t pm_state) | |
332 | { | |
333 | int error = acpi_suspend_begin(pm_state); | |
334 | ||
335 | if (!error) | |
336 | error = __acpi_pm_prepare(); | |
337 | return error; | |
338 | } | |
339 | ||
340 | /* | |
341 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
342 | * been requested. | |
343 | */ | |
344 | static struct platform_suspend_ops acpi_suspend_ops_old = { | |
345 | .valid = acpi_suspend_state_valid, | |
346 | .begin = acpi_suspend_begin_old, | |
d5a64513 | 347 | .prepare_late = acpi_pm_freeze, |
2c6e33c3 | 348 | .enter = acpi_suspend_enter, |
d5a64513 | 349 | .wake = acpi_suspend_finish, |
d8f3de0d RW |
350 | .end = acpi_pm_end, |
351 | .recover = acpi_pm_finish, | |
1da177e4 | 352 | }; |
e41fb7c5 CC |
353 | |
354 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) | |
355 | { | |
356 | old_suspend_ordering = true; | |
357 | return 0; | |
358 | } | |
359 | ||
65df7847 RW |
360 | static int __init init_set_sci_en_on_resume(const struct dmi_system_id *d) |
361 | { | |
362 | set_sci_en_on_resume = true; | |
363 | return 0; | |
364 | } | |
365 | ||
e41fb7c5 CC |
366 | static struct dmi_system_id __initdata acpisleep_dmi_table[] = { |
367 | { | |
368 | .callback = init_old_suspend_ordering, | |
369 | .ident = "Abit KN9 (nForce4 variant)", | |
370 | .matches = { | |
371 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), | |
372 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), | |
373 | }, | |
374 | }, | |
4fb507b6 RW |
375 | { |
376 | .callback = init_old_suspend_ordering, | |
377 | .ident = "HP xw4600 Workstation", | |
378 | .matches = { | |
379 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
380 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), | |
381 | }, | |
382 | }, | |
65df7847 RW |
383 | { |
384 | .callback = init_set_sci_en_on_resume, | |
385 | .ident = "Apple MacBook 1,1", | |
386 | .matches = { | |
387 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."), | |
388 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook1,1"), | |
389 | }, | |
390 | }, | |
391 | { | |
392 | .callback = init_set_sci_en_on_resume, | |
393 | .ident = "Apple MacMini 1,1", | |
394 | .matches = { | |
395 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."), | |
396 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"), | |
397 | }, | |
398 | }, | |
a1404495 AW |
399 | { |
400 | .callback = init_old_suspend_ordering, | |
401 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", | |
402 | .matches = { | |
403 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), | |
404 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), | |
405 | }, | |
406 | }, | |
45e77988 ZR |
407 | { |
408 | .callback = init_set_sci_en_on_resume, | |
409 | .ident = "Toshiba Satellite L300", | |
410 | .matches = { | |
411 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
412 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite L300"), | |
413 | }, | |
414 | }, | |
2a9ef8e1 | 415 | { |
ec79be26 BZ |
416 | .callback = init_set_sci_en_on_resume, |
417 | .ident = "Hewlett-Packard HP G7000 Notebook PC", | |
418 | .matches = { | |
419 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
420 | DMI_MATCH(DMI_PRODUCT_NAME, "HP G7000 Notebook PC"), | |
421 | }, | |
422 | }, | |
423 | { | |
eb0ca849 LB |
424 | .callback = init_set_sci_en_on_resume, |
425 | .ident = "Hewlett-Packard HP Pavilion dv3 Notebook PC", | |
426 | .matches = { | |
427 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
428 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv3 Notebook PC"), | |
429 | }, | |
8a1cbf64 GMDV |
430 | }, |
431 | { | |
432 | .callback = init_set_sci_en_on_resume, | |
433 | .ident = "Hewlett-Packard Pavilion dv4", | |
434 | .matches = { | |
435 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
436 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv4"), | |
437 | }, | |
2839d396 VV |
438 | }, |
439 | { | |
440 | .callback = init_set_sci_en_on_resume, | |
441 | .ident = "Hewlett-Packard Pavilion dv7", | |
442 | .matches = { | |
443 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
444 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv7"), | |
445 | }, | |
446 | }, | |
447 | { | |
448 | .callback = init_set_sci_en_on_resume, | |
87c687be LB |
449 | .ident = "Hewlett-Packard Compaq Presario C700 Notebook PC", |
450 | .matches = { | |
451 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
452 | DMI_MATCH(DMI_PRODUCT_NAME, "Compaq Presario C700 Notebook PC"), | |
453 | }, | |
454 | }, | |
455 | { | |
456 | .callback = init_set_sci_en_on_resume, | |
2839d396 VV |
457 | .ident = "Hewlett-Packard Compaq Presario CQ40 Notebook PC", |
458 | .matches = { | |
459 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
460 | DMI_MATCH(DMI_PRODUCT_NAME, "Compaq Presario CQ40 Notebook PC"), | |
461 | }, | |
eb0ca849 LB |
462 | }, |
463 | { | |
07bedca2 AC |
464 | .callback = init_set_sci_en_on_resume, |
465 | .ident = "Lenovo ThinkPad T410", | |
466 | .matches = { | |
467 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
468 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T410"), | |
469 | }, | |
470 | }, | |
471 | { | |
472 | .callback = init_set_sci_en_on_resume, | |
473 | .ident = "Lenovo ThinkPad T510", | |
474 | .matches = { | |
475 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
476 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T510"), | |
477 | }, | |
478 | }, | |
479 | { | |
480 | .callback = init_set_sci_en_on_resume, | |
481 | .ident = "Lenovo ThinkPad W510", | |
482 | .matches = { | |
483 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
484 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W510"), | |
485 | }, | |
486 | }, | |
487 | { | |
488 | .callback = init_set_sci_en_on_resume, | |
7d6fb7bd | 489 | .ident = "Lenovo ThinkPad X201[s]", |
07bedca2 AC |
490 | .matches = { |
491 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
492 | DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201"), | |
493 | }, | |
494 | }, | |
495 | { | |
2a9ef8e1 ZY |
496 | .callback = init_old_suspend_ordering, |
497 | .ident = "Panasonic CF51-2L", | |
498 | .matches = { | |
499 | DMI_MATCH(DMI_BOARD_VENDOR, | |
500 | "Matsushita Electric Industrial Co.,Ltd."), | |
501 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), | |
502 | }, | |
503 | }, | |
ea5bc73f KM |
504 | { |
505 | .callback = init_set_sci_en_on_resume, | |
506 | .ident = "Dell Studio 1558", | |
507 | .matches = { | |
508 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
509 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1558"), | |
510 | }, | |
511 | }, | |
512 | { | |
513 | .callback = init_set_sci_en_on_resume, | |
514 | .ident = "Dell Studio 1557", | |
515 | .matches = { | |
516 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
517 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"), | |
518 | }, | |
519 | }, | |
520 | { | |
521 | .callback = init_set_sci_en_on_resume, | |
522 | .ident = "Dell Studio 1555", | |
523 | .matches = { | |
524 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
525 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1555"), | |
526 | }, | |
527 | }, | |
e41fb7c5 CC |
528 | {}, |
529 | }; | |
296699de RW |
530 | #endif /* CONFIG_SUSPEND */ |
531 | ||
b0cb1a19 | 532 | #ifdef CONFIG_HIBERNATION |
5d8b532a RW |
533 | /* |
534 | * The ACPI specification wants us to save NVS memory regions during hibernation | |
535 | * and to restore them during the subsequent resume. However, it is not certain | |
536 | * if this mechanism is going to work on all machines, so we allow the user to | |
537 | * disable this mechanism using the 'acpi_sleep=s4_nonvs' kernel command line | |
538 | * option. | |
539 | */ | |
540 | static bool s4_no_nvs; | |
541 | ||
542 | void __init acpi_s4_no_nvs(void) | |
543 | { | |
544 | s4_no_nvs = true; | |
545 | } | |
546 | ||
bdfe6b7c SL |
547 | static unsigned long s4_hardware_signature; |
548 | static struct acpi_table_facs *facs; | |
549 | static bool nosigcheck; | |
550 | ||
551 | void __init acpi_no_s4_hw_signature(void) | |
552 | { | |
553 | nosigcheck = true; | |
554 | } | |
555 | ||
caea99ef | 556 | static int acpi_hibernation_begin(void) |
74f270af | 557 | { |
3f4b0ef7 RW |
558 | int error; |
559 | ||
ba84ed95 | 560 | error = s4_no_nvs ? 0 : hibernate_nvs_alloc(); |
3f4b0ef7 RW |
561 | if (!error) { |
562 | acpi_target_sleep_state = ACPI_STATE_S4; | |
563 | acpi_sleep_tts_switch(acpi_target_sleep_state); | |
564 | } | |
565 | ||
566 | return error; | |
567 | } | |
568 | ||
569 | static int acpi_hibernation_pre_snapshot(void) | |
570 | { | |
571 | int error = acpi_pm_prepare(); | |
572 | ||
573 | if (!error) | |
574 | hibernate_nvs_save(); | |
575 | ||
576 | return error; | |
74f270af RW |
577 | } |
578 | ||
a3d25c27 RW |
579 | static int acpi_hibernation_enter(void) |
580 | { | |
581 | acpi_status status = AE_OK; | |
582 | unsigned long flags = 0; | |
583 | ||
584 | ACPI_FLUSH_CPU_CACHE(); | |
585 | ||
586 | local_irq_save(flags); | |
587 | acpi_enable_wakeup_device(ACPI_STATE_S4); | |
588 | /* This shouldn't return. If it returns, we have a problem */ | |
589 | status = acpi_enter_sleep_state(ACPI_STATE_S4); | |
c95d47a8 RW |
590 | /* Reprogram control registers and execute _BFS */ |
591 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
a3d25c27 RW |
592 | local_irq_restore(flags); |
593 | ||
594 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; | |
595 | } | |
596 | ||
3f4b0ef7 RW |
597 | static void acpi_hibernation_finish(void) |
598 | { | |
599 | hibernate_nvs_free(); | |
d5a64513 | 600 | acpi_ec_resume_transactions(); |
3f4b0ef7 RW |
601 | acpi_pm_finish(); |
602 | } | |
603 | ||
c7e0831d RW |
604 | static void acpi_hibernation_leave(void) |
605 | { | |
606 | /* | |
607 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to | |
608 | * enable it here. | |
609 | */ | |
610 | acpi_enable(); | |
c95d47a8 RW |
611 | /* Reprogram control registers and execute _BFS */ |
612 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); | |
bdfe6b7c SL |
613 | /* Check the hardware signature */ |
614 | if (facs && s4_hardware_signature != facs->hardware_signature) { | |
615 | printk(KERN_EMERG "ACPI: Hardware changed while hibernated, " | |
616 | "cannot resume!\n"); | |
617 | panic("ACPI S4 hardware signature mismatch"); | |
618 | } | |
3f4b0ef7 RW |
619 | /* Restore the NVS memory area */ |
620 | hibernate_nvs_restore(); | |
d5a64513 RW |
621 | /* Allow EC transactions to happen. */ |
622 | acpi_ec_resume_transactions_early(); | |
c7e0831d RW |
623 | } |
624 | ||
d5a64513 | 625 | static void acpi_pm_thaw(void) |
f6bb13aa RW |
626 | { |
627 | acpi_ec_resume_transactions(); | |
3d97e426 | 628 | acpi_enable_all_runtime_gpes(); |
a3d25c27 RW |
629 | } |
630 | ||
d8f3de0d RW |
631 | static struct platform_hibernation_ops acpi_hibernation_ops = { |
632 | .begin = acpi_hibernation_begin, | |
633 | .end = acpi_pm_end, | |
3f4b0ef7 RW |
634 | .pre_snapshot = acpi_hibernation_pre_snapshot, |
635 | .finish = acpi_hibernation_finish, | |
d8f3de0d RW |
636 | .prepare = acpi_pm_prepare, |
637 | .enter = acpi_hibernation_enter, | |
638 | .leave = acpi_hibernation_leave, | |
d5a64513 RW |
639 | .pre_restore = acpi_pm_freeze, |
640 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 641 | }; |
caea99ef | 642 | |
d8f3de0d RW |
643 | /** |
644 | * acpi_hibernation_begin_old - Set the target system sleep state to | |
645 | * ACPI_STATE_S4 and execute the _PTS control method. This | |
646 | * function is used if the pre-ACPI 2.0 suspend ordering has been | |
647 | * requested. | |
648 | */ | |
649 | static int acpi_hibernation_begin_old(void) | |
a634cc10 | 650 | { |
e49f711c ZY |
651 | int error; |
652 | /* | |
653 | * The _TTS object should always be evaluated before the _PTS object. | |
654 | * When the old_suspended_ordering is true, the _PTS object is | |
655 | * evaluated in the acpi_sleep_prepare. | |
656 | */ | |
657 | acpi_sleep_tts_switch(ACPI_STATE_S4); | |
658 | ||
659 | error = acpi_sleep_prepare(ACPI_STATE_S4); | |
a634cc10 | 660 | |
3f4b0ef7 | 661 | if (!error) { |
ba84ed95 RW |
662 | if (!s4_no_nvs) |
663 | error = hibernate_nvs_alloc(); | |
3f4b0ef7 RW |
664 | if (!error) |
665 | acpi_target_sleep_state = ACPI_STATE_S4; | |
666 | } | |
667 | return error; | |
668 | } | |
669 | ||
670 | static int acpi_hibernation_pre_snapshot_old(void) | |
671 | { | |
d5a64513 RW |
672 | acpi_pm_freeze(); |
673 | hibernate_nvs_save(); | |
674 | return 0; | |
a634cc10 RW |
675 | } |
676 | ||
d8f3de0d RW |
677 | /* |
678 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has | |
679 | * been requested. | |
680 | */ | |
681 | static struct platform_hibernation_ops acpi_hibernation_ops_old = { | |
682 | .begin = acpi_hibernation_begin_old, | |
683 | .end = acpi_pm_end, | |
3f4b0ef7 RW |
684 | .pre_snapshot = acpi_hibernation_pre_snapshot_old, |
685 | .finish = acpi_hibernation_finish, | |
d5a64513 | 686 | .prepare = acpi_pm_freeze, |
a3d25c27 | 687 | .enter = acpi_hibernation_enter, |
c7e0831d | 688 | .leave = acpi_hibernation_leave, |
d5a64513 RW |
689 | .pre_restore = acpi_pm_freeze, |
690 | .restore_cleanup = acpi_pm_thaw, | |
d8f3de0d | 691 | .recover = acpi_pm_finish, |
a3d25c27 | 692 | }; |
d8f3de0d | 693 | #endif /* CONFIG_HIBERNATION */ |
a3d25c27 | 694 | |
296699de RW |
695 | int acpi_suspend(u32 acpi_state) |
696 | { | |
697 | suspend_state_t states[] = { | |
698 | [1] = PM_SUSPEND_STANDBY, | |
699 | [3] = PM_SUSPEND_MEM, | |
700 | [5] = PM_SUSPEND_MAX | |
701 | }; | |
702 | ||
703 | if (acpi_state < 6 && states[acpi_state]) | |
704 | return pm_suspend(states[acpi_state]); | |
705 | if (acpi_state == 4) | |
706 | return hibernate(); | |
707 | return -EINVAL; | |
708 | } | |
709 | ||
853298bc | 710 | #ifdef CONFIG_PM_SLEEP |
fd4aff1a SL |
711 | /** |
712 | * acpi_pm_device_sleep_state - return preferred power state of ACPI device | |
713 | * in the system sleep state given by %acpi_target_sleep_state | |
2fe2de5f DB |
714 | * @dev: device to examine; its driver model wakeup flags control |
715 | * whether it should be able to wake up the system | |
fd4aff1a SL |
716 | * @d_min_p: used to store the upper limit of allowed states range |
717 | * Return value: preferred power state of the device on success, -ENODEV on | |
718 | * failure (ie. if there's no 'struct acpi_device' for @dev) | |
719 | * | |
720 | * Find the lowest power (highest number) ACPI device power state that | |
721 | * device @dev can be in while the system is in the sleep state represented | |
722 | * by %acpi_target_sleep_state. If @wake is nonzero, the device should be | |
723 | * able to wake up the system from this sleep state. If @d_min_p is set, | |
724 | * the highest power (lowest number) device power state of @dev allowed | |
725 | * in this system sleep state is stored at the location pointed to by it. | |
726 | * | |
727 | * The caller must ensure that @dev is valid before using this function. | |
728 | * The caller is also responsible for figuring out if the device is | |
729 | * supposed to be able to wake up the system and passing this information | |
730 | * via @wake. | |
731 | */ | |
732 | ||
2fe2de5f | 733 | int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p) |
fd4aff1a SL |
734 | { |
735 | acpi_handle handle = DEVICE_ACPI_HANDLE(dev); | |
736 | struct acpi_device *adev; | |
737 | char acpi_method[] = "_SxD"; | |
27663c58 | 738 | unsigned long long d_min, d_max; |
fd4aff1a SL |
739 | |
740 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
ead77594 | 741 | printk(KERN_DEBUG "ACPI handle has no context!\n"); |
fd4aff1a SL |
742 | return -ENODEV; |
743 | } | |
744 | ||
745 | acpi_method[2] = '0' + acpi_target_sleep_state; | |
746 | /* | |
747 | * If the sleep state is S0, we will return D3, but if the device has | |
748 | * _S0W, we will use the value from _S0W | |
749 | */ | |
750 | d_min = ACPI_STATE_D0; | |
751 | d_max = ACPI_STATE_D3; | |
752 | ||
753 | /* | |
754 | * If present, _SxD methods return the minimum D-state (highest power | |
755 | * state) we can use for the corresponding S-states. Otherwise, the | |
756 | * minimum D-state is D0 (ACPI 3.x). | |
757 | * | |
758 | * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer | |
759 | * provided -- that's our fault recovery, we ignore retval. | |
760 | */ | |
761 | if (acpi_target_sleep_state > ACPI_STATE_S0) | |
762 | acpi_evaluate_integer(handle, acpi_method, NULL, &d_min); | |
763 | ||
764 | /* | |
765 | * If _PRW says we can wake up the system from the target sleep state, | |
766 | * the D-state returned by _SxD is sufficient for that (we assume a | |
767 | * wakeup-aware driver if wake is set). Still, if _SxW exists | |
768 | * (ACPI 3.x), it should return the maximum (lowest power) D-state that | |
769 | * can wake the system. _S0W may be valid, too. | |
770 | */ | |
771 | if (acpi_target_sleep_state == ACPI_STATE_S0 || | |
2fe2de5f | 772 | (device_may_wakeup(dev) && adev->wakeup.state.enabled && |
fd4aff1a | 773 | adev->wakeup.sleep_state <= acpi_target_sleep_state)) { |
ad3399c3 RW |
774 | acpi_status status; |
775 | ||
fd4aff1a | 776 | acpi_method[3] = 'W'; |
ad3399c3 RW |
777 | status = acpi_evaluate_integer(handle, acpi_method, NULL, |
778 | &d_max); | |
779 | if (ACPI_FAILURE(status)) { | |
780 | d_max = d_min; | |
781 | } else if (d_max < d_min) { | |
782 | /* Warn the user of the broken DSDT */ | |
783 | printk(KERN_WARNING "ACPI: Wrong value from %s\n", | |
784 | acpi_method); | |
785 | /* Sanitize it */ | |
fd4aff1a | 786 | d_min = d_max; |
ad3399c3 | 787 | } |
fd4aff1a SL |
788 | } |
789 | ||
790 | if (d_min_p) | |
791 | *d_min_p = d_min; | |
792 | return d_max; | |
793 | } | |
eb9d0fe4 RW |
794 | |
795 | /** | |
796 | * acpi_pm_device_sleep_wake - enable or disable the system wake-up | |
797 | * capability of given device | |
798 | * @dev: device to handle | |
799 | * @enable: 'true' - enable, 'false' - disable the wake-up capability | |
800 | */ | |
801 | int acpi_pm_device_sleep_wake(struct device *dev, bool enable) | |
802 | { | |
803 | acpi_handle handle; | |
804 | struct acpi_device *adev; | |
df8db91f | 805 | int error; |
eb9d0fe4 | 806 | |
0baed8da | 807 | if (!device_can_wakeup(dev)) |
eb9d0fe4 RW |
808 | return -EINVAL; |
809 | ||
810 | handle = DEVICE_ACPI_HANDLE(dev); | |
811 | if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { | |
df8db91f | 812 | dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__); |
eb9d0fe4 RW |
813 | return -ENODEV; |
814 | } | |
815 | ||
9630bdd9 RW |
816 | if (enable) { |
817 | error = acpi_enable_wakeup_device_power(adev, | |
818 | acpi_target_sleep_state); | |
819 | if (!error) | |
820 | acpi_enable_gpe(adev->wakeup.gpe_device, | |
821 | adev->wakeup.gpe_number, | |
822 | ACPI_GPE_TYPE_WAKE); | |
823 | } else { | |
824 | acpi_disable_gpe(adev->wakeup.gpe_device, adev->wakeup.gpe_number, | |
825 | ACPI_GPE_TYPE_WAKE); | |
826 | error = acpi_disable_wakeup_device_power(adev); | |
827 | } | |
df8db91f RW |
828 | if (!error) |
829 | dev_info(dev, "wake-up capability %s by ACPI\n", | |
830 | enable ? "enabled" : "disabled"); | |
831 | ||
832 | return error; | |
eb9d0fe4 | 833 | } |
853298bc | 834 | #endif |
fd4aff1a | 835 | |
f216cc37 AS |
836 | static void acpi_power_off_prepare(void) |
837 | { | |
838 | /* Prepare to power off the system */ | |
839 | acpi_sleep_prepare(ACPI_STATE_S5); | |
3d97e426 | 840 | acpi_disable_all_gpes(); |
f216cc37 AS |
841 | } |
842 | ||
843 | static void acpi_power_off(void) | |
844 | { | |
845 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ | |
4d939155 | 846 | printk(KERN_DEBUG "%s called\n", __func__); |
f216cc37 | 847 | local_irq_disable(); |
9c1c6a1b | 848 | acpi_enable_wakeup_device(ACPI_STATE_S5); |
f216cc37 AS |
849 | acpi_enter_sleep_state(ACPI_STATE_S5); |
850 | } | |
851 | ||
96f15efc LB |
852 | /* |
853 | * ACPI 2.0 created the optional _GTS and _BFS, | |
854 | * but industry adoption has been neither rapid nor broad. | |
855 | * | |
856 | * Linux gets into trouble when it executes poorly validated | |
857 | * paths through the BIOS, so disable _GTS and _BFS by default, | |
858 | * but do speak up and offer the option to enable them. | |
859 | */ | |
860 | void __init acpi_gts_bfs_check(void) | |
861 | { | |
862 | acpi_handle dummy; | |
863 | ||
864 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__GTS, &dummy))) | |
865 | { | |
866 | printk(KERN_NOTICE PREFIX "BIOS offers _GTS\n"); | |
867 | printk(KERN_NOTICE PREFIX "If \"acpi.gts=1\" improves suspend, " | |
868 | "please notify linux-acpi@vger.kernel.org\n"); | |
869 | } | |
870 | if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__BFS, &dummy))) | |
871 | { | |
872 | printk(KERN_NOTICE PREFIX "BIOS offers _BFS\n"); | |
873 | printk(KERN_NOTICE PREFIX "If \"acpi.bfs=1\" improves resume, " | |
874 | "please notify linux-acpi@vger.kernel.org\n"); | |
875 | } | |
876 | } | |
877 | ||
aafbcd16 | 878 | int __init acpi_sleep_init(void) |
1da177e4 | 879 | { |
296699de RW |
880 | acpi_status status; |
881 | u8 type_a, type_b; | |
882 | #ifdef CONFIG_SUSPEND | |
e2a5b420 | 883 | int i = 0; |
e41fb7c5 CC |
884 | |
885 | dmi_check_system(acpisleep_dmi_table); | |
296699de | 886 | #endif |
1da177e4 LT |
887 | |
888 | if (acpi_disabled) | |
889 | return 0; | |
890 | ||
5a50fe70 FP |
891 | sleep_states[ACPI_STATE_S0] = 1; |
892 | printk(KERN_INFO PREFIX "(supports S0"); | |
893 | ||
296699de | 894 | #ifdef CONFIG_SUSPEND |
5a50fe70 | 895 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) { |
1da177e4 LT |
896 | status = acpi_get_sleep_type_data(i, &type_a, &type_b); |
897 | if (ACPI_SUCCESS(status)) { | |
898 | sleep_states[i] = 1; | |
899 | printk(" S%d", i); | |
900 | } | |
1da177e4 | 901 | } |
1da177e4 | 902 | |
d8f3de0d RW |
903 | suspend_set_ops(old_suspend_ordering ? |
904 | &acpi_suspend_ops_old : &acpi_suspend_ops); | |
296699de | 905 | #endif |
a3d25c27 | 906 | |
b0cb1a19 | 907 | #ifdef CONFIG_HIBERNATION |
296699de RW |
908 | status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b); |
909 | if (ACPI_SUCCESS(status)) { | |
d8f3de0d RW |
910 | hibernation_set_ops(old_suspend_ordering ? |
911 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); | |
296699de | 912 | sleep_states[ACPI_STATE_S4] = 1; |
f216cc37 | 913 | printk(" S4"); |
bdfe6b7c | 914 | if (!nosigcheck) { |
3d97e426 | 915 | acpi_get_table(ACPI_SIG_FACS, 1, |
bdfe6b7c SL |
916 | (struct acpi_table_header **)&facs); |
917 | if (facs) | |
918 | s4_hardware_signature = | |
919 | facs->hardware_signature; | |
920 | } | |
296699de | 921 | } |
a3d25c27 | 922 | #endif |
f216cc37 AS |
923 | status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b); |
924 | if (ACPI_SUCCESS(status)) { | |
925 | sleep_states[ACPI_STATE_S5] = 1; | |
926 | printk(" S5"); | |
927 | pm_power_off_prepare = acpi_power_off_prepare; | |
928 | pm_power_off = acpi_power_off; | |
929 | } | |
930 | printk(")\n"); | |
e49f711c ZY |
931 | /* |
932 | * Register the tts_notifier to reboot notifier list so that the _TTS | |
933 | * object can also be evaluated when the system enters S5. | |
934 | */ | |
935 | register_reboot_notifier(&tts_notifier); | |
96f15efc | 936 | acpi_gts_bfs_check(); |
1da177e4 LT |
937 | return 0; |
938 | } |