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1da177e4 LT |
1 | |
2 | /****************************************************************************** | |
3 | * | |
4 | * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
75a44ce0 | 9 | * Copyright (C) 2000 - 2008, Intel Corp. |
1da177e4 LT |
10 | * All rights reserved. |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
1da177e4 | 45 | #include <acpi/acpi.h> |
50df4d8b | 46 | #include <acpi/accommon.h> |
f3d2e786 | 47 | #include <acpi/actables.h> |
1da177e4 LT |
48 | |
49 | #define _COMPONENT ACPI_HARDWARE | |
4be44fcd | 50 | ACPI_MODULE_NAME("hwsleep") |
1da177e4 | 51 | |
44f6c012 | 52 | /******************************************************************************* |
1da177e4 LT |
53 | * |
54 | * FUNCTION: acpi_set_firmware_waking_vector | |
55 | * | |
d85988fa | 56 | * PARAMETERS: physical_address - 32-bit physical address of ACPI real mode |
1da177e4 LT |
57 | * entry point. |
58 | * | |
59 | * RETURN: Status | |
60 | * | |
d85988fa | 61 | * DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS |
1da177e4 LT |
62 | * |
63 | ******************************************************************************/ | |
1da177e4 | 64 | acpi_status |
d85988fa | 65 | acpi_set_firmware_waking_vector(u32 physical_address) |
1da177e4 | 66 | { |
b229cf92 | 67 | ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector); |
1da177e4 | 68 | |
f3d2e786 | 69 | |
a6629105 RW |
70 | /* |
71 | * According to the ACPI specification 2.0c and later, the 64-bit | |
72 | * waking vector should be cleared and the 32-bit waking vector should | |
73 | * be used, unless we want the wake-up code to be called by the BIOS in | |
74 | * Protected Mode. Some systems (for example HP dv5-1004nr) are known | |
75 | * to fail to resume if the 64-bit vector is used. | |
76 | */ | |
a6629105 | 77 | |
d85988fa BM |
78 | /* Set the 32-bit vector */ |
79 | ||
009c4cbe | 80 | acpi_gbl_FACS->firmware_waking_vector = physical_address; |
d85988fa BM |
81 | |
82 | /* Clear the 64-bit vector if it exists */ | |
83 | ||
009c4cbe BM |
84 | if ((acpi_gbl_FACS->length > 32) && (acpi_gbl_FACS->version >= 1)) { |
85 | acpi_gbl_FACS->xfirmware_waking_vector = 0; | |
d85988fa | 86 | } |
1da177e4 | 87 | |
4be44fcd | 88 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
89 | } |
90 | ||
8313524a BM |
91 | ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector) |
92 | ||
44f6c012 | 93 | /******************************************************************************* |
1da177e4 | 94 | * |
d85988fa | 95 | * FUNCTION: acpi_set_firmware_waking_vector64 |
1da177e4 | 96 | * |
d85988fa BM |
97 | * PARAMETERS: physical_address - 64-bit physical address of ACPI protected |
98 | * mode entry point. | |
1da177e4 | 99 | * |
d85988fa | 100 | * RETURN: Status |
1da177e4 | 101 | * |
d85988fa BM |
102 | * DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if |
103 | * it exists in the table. | |
1da177e4 LT |
104 | * |
105 | ******************************************************************************/ | |
1da177e4 | 106 | acpi_status |
d85988fa | 107 | acpi_set_firmware_waking_vector64(u64 physical_address) |
1da177e4 | 108 | { |
d85988fa | 109 | ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector64); |
1da177e4 | 110 | |
1da177e4 | 111 | |
d85988fa BM |
112 | /* Determine if the 64-bit vector actually exists */ |
113 | ||
009c4cbe | 114 | if ((acpi_gbl_FACS->length <= 32) || (acpi_gbl_FACS->version < 1)) { |
d85988fa BM |
115 | return_ACPI_STATUS(AE_NOT_EXIST); |
116 | } | |
117 | ||
118 | /* Clear 32-bit vector, set the 64-bit X_ vector */ | |
119 | ||
009c4cbe BM |
120 | acpi_gbl_FACS->firmware_waking_vector = 0; |
121 | acpi_gbl_FACS->xfirmware_waking_vector = physical_address; | |
1da177e4 | 122 | |
4be44fcd | 123 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 124 | } |
8313524a | 125 | |
d85988fa BM |
126 | ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64) |
127 | ||
44f6c012 | 128 | /******************************************************************************* |
1da177e4 LT |
129 | * |
130 | * FUNCTION: acpi_enter_sleep_state_prep | |
131 | * | |
132 | * PARAMETERS: sleep_state - Which sleep state to enter | |
133 | * | |
134 | * RETURN: Status | |
135 | * | |
136 | * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231) | |
137 | * This function must execute with interrupts enabled. | |
138 | * We break sleeping into 2 stages so that OSPM can handle | |
139 | * various OS-specific tasks between the two steps. | |
140 | * | |
141 | ******************************************************************************/ | |
4be44fcd | 142 | acpi_status acpi_enter_sleep_state_prep(u8 sleep_state) |
1da177e4 | 143 | { |
4be44fcd LB |
144 | acpi_status status; |
145 | struct acpi_object_list arg_list; | |
146 | union acpi_object arg; | |
1da177e4 | 147 | |
b229cf92 | 148 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep); |
1da177e4 LT |
149 | |
150 | /* | |
151 | * _PSW methods could be run here to enable wake-on keyboard, LAN, etc. | |
152 | */ | |
4be44fcd LB |
153 | status = acpi_get_sleep_type_data(sleep_state, |
154 | &acpi_gbl_sleep_type_a, | |
155 | &acpi_gbl_sleep_type_b); | |
156 | if (ACPI_FAILURE(status)) { | |
157 | return_ACPI_STATUS(status); | |
1da177e4 LT |
158 | } |
159 | ||
160 | /* Setup parameter object */ | |
161 | ||
162 | arg_list.count = 1; | |
163 | arg_list.pointer = &arg; | |
164 | ||
165 | arg.type = ACPI_TYPE_INTEGER; | |
166 | arg.integer.value = sleep_state; | |
167 | ||
c95d47a8 | 168 | /* Run the _PTS method */ |
1da177e4 | 169 | |
4be44fcd LB |
170 | status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL); |
171 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
172 | return_ACPI_STATUS(status); | |
1da177e4 LT |
173 | } |
174 | ||
1da177e4 LT |
175 | /* Setup the argument to _SST */ |
176 | ||
177 | switch (sleep_state) { | |
178 | case ACPI_STATE_S0: | |
179 | arg.integer.value = ACPI_SST_WORKING; | |
180 | break; | |
181 | ||
182 | case ACPI_STATE_S1: | |
183 | case ACPI_STATE_S2: | |
184 | case ACPI_STATE_S3: | |
185 | arg.integer.value = ACPI_SST_SLEEPING; | |
186 | break; | |
187 | ||
188 | case ACPI_STATE_S4: | |
189 | arg.integer.value = ACPI_SST_SLEEP_CONTEXT; | |
190 | break; | |
191 | ||
192 | default: | |
4be44fcd | 193 | arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */ |
1da177e4 LT |
194 | break; |
195 | } | |
196 | ||
d52c79ac BM |
197 | /* |
198 | * Set the system indicators to show the desired sleep state. | |
199 | * _SST is an optional method (return no error if not found) | |
200 | */ | |
4be44fcd LB |
201 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
202 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 BM |
203 | ACPI_EXCEPTION((AE_INFO, status, |
204 | "While executing method _SST")); | |
1da177e4 LT |
205 | } |
206 | ||
d52c79ac | 207 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
208 | } |
209 | ||
8313524a BM |
210 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep) |
211 | ||
44f6c012 | 212 | /******************************************************************************* |
1da177e4 LT |
213 | * |
214 | * FUNCTION: acpi_enter_sleep_state | |
215 | * | |
216 | * PARAMETERS: sleep_state - Which sleep state to enter | |
217 | * | |
218 | * RETURN: Status | |
219 | * | |
220 | * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231) | |
221 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
222 | * | |
223 | ******************************************************************************/ | |
4be44fcd | 224 | acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state) |
1da177e4 | 225 | { |
4be44fcd LB |
226 | u32 PM1Acontrol; |
227 | u32 PM1Bcontrol; | |
228 | struct acpi_bit_register_info *sleep_type_reg_info; | |
229 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
230 | u32 in_value; | |
c95d47a8 RW |
231 | struct acpi_object_list arg_list; |
232 | union acpi_object arg; | |
4be44fcd | 233 | acpi_status status; |
1da177e4 | 234 | |
b229cf92 | 235 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state); |
1da177e4 LT |
236 | |
237 | if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) || | |
4be44fcd | 238 | (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) { |
b8e4d893 BM |
239 | ACPI_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X", |
240 | acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b)); | |
4be44fcd | 241 | return_ACPI_STATUS(AE_AML_OPERAND_VALUE); |
1da177e4 LT |
242 | } |
243 | ||
4be44fcd LB |
244 | sleep_type_reg_info = |
245 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A); | |
246 | sleep_enable_reg_info = | |
247 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
248 | |
249 | /* Clear wake status */ | |
250 | ||
d8c71b6d | 251 | status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); |
4be44fcd LB |
252 | if (ACPI_FAILURE(status)) { |
253 | return_ACPI_STATUS(status); | |
1da177e4 LT |
254 | } |
255 | ||
256 | /* Clear all fixed and general purpose status bits */ | |
257 | ||
d8c71b6d | 258 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
259 | if (ACPI_FAILURE(status)) { |
260 | return_ACPI_STATUS(status); | |
1da177e4 LT |
261 | } |
262 | ||
263 | /* | |
23b168d4 | 264 | * 1) Disable/Clear all GPEs |
1da177e4 LT |
265 | * 2) Enable all wakeup GPEs |
266 | */ | |
1d99967b AS |
267 | status = acpi_hw_disable_all_gpes(); |
268 | if (ACPI_FAILURE(status)) { | |
269 | return_ACPI_STATUS(status); | |
270 | } | |
1da177e4 LT |
271 | acpi_gbl_system_awake_and_running = FALSE; |
272 | ||
4be44fcd LB |
273 | status = acpi_hw_enable_all_wakeup_gpes(); |
274 | if (ACPI_FAILURE(status)) { | |
275 | return_ACPI_STATUS(status); | |
1da177e4 LT |
276 | } |
277 | ||
c95d47a8 RW |
278 | /* Execute the _GTS method */ |
279 | ||
280 | arg_list.count = 1; | |
281 | arg_list.pointer = &arg; | |
282 | arg.type = ACPI_TYPE_INTEGER; | |
283 | arg.integer.value = sleep_state; | |
284 | ||
285 | status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL); | |
286 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
287 | return_ACPI_STATUS(status); | |
288 | } | |
289 | ||
1da177e4 LT |
290 | /* Get current value of PM1A control */ |
291 | ||
d30dc9ab | 292 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol); |
4be44fcd LB |
293 | if (ACPI_FAILURE(status)) { |
294 | return_ACPI_STATUS(status); | |
1da177e4 | 295 | } |
4be44fcd LB |
296 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
297 | "Entering sleep state [S%d]\n", sleep_state)); | |
1da177e4 LT |
298 | |
299 | /* Clear SLP_EN and SLP_TYP fields */ | |
300 | ||
44f6c012 | 301 | PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | |
4be44fcd | 302 | sleep_enable_reg_info->access_bit_mask); |
1da177e4 LT |
303 | PM1Bcontrol = PM1Acontrol; |
304 | ||
305 | /* Insert SLP_TYP bits */ | |
306 | ||
4be44fcd LB |
307 | PM1Acontrol |= |
308 | (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); | |
309 | PM1Bcontrol |= | |
310 | (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position); | |
1da177e4 LT |
311 | |
312 | /* | |
313 | * We split the writes of SLP_TYP and SLP_EN to workaround | |
314 | * poorly implemented hardware. | |
315 | */ | |
316 | ||
317 | /* Write #1: fill in SLP_TYP data */ | |
318 | ||
d30dc9ab | 319 | status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
4be44fcd LB |
320 | PM1Acontrol); |
321 | if (ACPI_FAILURE(status)) { | |
322 | return_ACPI_STATUS(status); | |
1da177e4 LT |
323 | } |
324 | ||
d30dc9ab | 325 | status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
4be44fcd LB |
326 | PM1Bcontrol); |
327 | if (ACPI_FAILURE(status)) { | |
328 | return_ACPI_STATUS(status); | |
1da177e4 LT |
329 | } |
330 | ||
331 | /* Insert SLP_ENABLE bit */ | |
332 | ||
333 | PM1Acontrol |= sleep_enable_reg_info->access_bit_mask; | |
334 | PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask; | |
335 | ||
336 | /* Write #2: SLP_TYP + SLP_EN */ | |
337 | ||
4be44fcd | 338 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 339 | |
d30dc9ab | 340 | status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
4be44fcd LB |
341 | PM1Acontrol); |
342 | if (ACPI_FAILURE(status)) { | |
343 | return_ACPI_STATUS(status); | |
1da177e4 LT |
344 | } |
345 | ||
d30dc9ab | 346 | status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
4be44fcd LB |
347 | PM1Bcontrol); |
348 | if (ACPI_FAILURE(status)) { | |
349 | return_ACPI_STATUS(status); | |
1da177e4 LT |
350 | } |
351 | ||
352 | if (sleep_state > ACPI_STATE_S3) { | |
353 | /* | |
44f6c012 RM |
354 | * We wanted to sleep > S3, but it didn't happen (by virtue of the |
355 | * fact that we are still executing!) | |
1da177e4 | 356 | * |
44f6c012 RM |
357 | * Wait ten seconds, then try again. This is to get S4/S5 to work on |
358 | * all machines. | |
1da177e4 LT |
359 | * |
360 | * We wait so long to allow chipsets that poll this reg very slowly to | |
361 | * still read the right value. Ideally, this block would go | |
362 | * away entirely. | |
363 | */ | |
4be44fcd LB |
364 | acpi_os_stall(10000000); |
365 | ||
d30dc9ab | 366 | status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL, |
4be44fcd LB |
367 | sleep_enable_reg_info-> |
368 | access_bit_mask); | |
369 | if (ACPI_FAILURE(status)) { | |
370 | return_ACPI_STATUS(status); | |
1da177e4 LT |
371 | } |
372 | } | |
373 | ||
374 | /* Wait until we enter sleep state */ | |
375 | ||
376 | do { | |
2d571b33 AS |
377 | status = acpi_get_register_unlocked(ACPI_BITREG_WAKE_STATUS, |
378 | &in_value); | |
4be44fcd LB |
379 | if (ACPI_FAILURE(status)) { |
380 | return_ACPI_STATUS(status); | |
1da177e4 LT |
381 | } |
382 | ||
383 | /* Spin until we wake */ | |
384 | ||
385 | } while (!in_value); | |
386 | ||
4be44fcd | 387 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 388 | } |
1da177e4 | 389 | |
8313524a | 390 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state) |
1da177e4 | 391 | |
44f6c012 | 392 | /******************************************************************************* |
1da177e4 LT |
393 | * |
394 | * FUNCTION: acpi_enter_sleep_state_s4bios | |
395 | * | |
396 | * PARAMETERS: None | |
397 | * | |
398 | * RETURN: Status | |
399 | * | |
400 | * DESCRIPTION: Perform a S4 bios request. | |
401 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
402 | * | |
403 | ******************************************************************************/ | |
4be44fcd | 404 | acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void) |
1da177e4 | 405 | { |
4be44fcd LB |
406 | u32 in_value; |
407 | acpi_status status; | |
1da177e4 | 408 | |
b229cf92 | 409 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios); |
1da177e4 | 410 | |
d8c71b6d | 411 | status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); |
4be44fcd LB |
412 | if (ACPI_FAILURE(status)) { |
413 | return_ACPI_STATUS(status); | |
1da177e4 LT |
414 | } |
415 | ||
d8c71b6d | 416 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
417 | if (ACPI_FAILURE(status)) { |
418 | return_ACPI_STATUS(status); | |
1da177e4 LT |
419 | } |
420 | ||
421 | /* | |
422 | * 1) Disable/Clear all GPEs | |
423 | * 2) Enable all wakeup GPEs | |
424 | */ | |
4be44fcd LB |
425 | status = acpi_hw_disable_all_gpes(); |
426 | if (ACPI_FAILURE(status)) { | |
427 | return_ACPI_STATUS(status); | |
1da177e4 LT |
428 | } |
429 | acpi_gbl_system_awake_and_running = FALSE; | |
430 | ||
4be44fcd LB |
431 | status = acpi_hw_enable_all_wakeup_gpes(); |
432 | if (ACPI_FAILURE(status)) { | |
433 | return_ACPI_STATUS(status); | |
1da177e4 LT |
434 | } |
435 | ||
4be44fcd | 436 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 437 | |
f3d2e786 BM |
438 | status = acpi_os_write_port(acpi_gbl_FADT.smi_command, |
439 | (u32) acpi_gbl_FADT.S4bios_request, 8); | |
1da177e4 LT |
440 | |
441 | do { | |
442 | acpi_os_stall(1000); | |
d8c71b6d | 443 | status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value); |
4be44fcd LB |
444 | if (ACPI_FAILURE(status)) { |
445 | return_ACPI_STATUS(status); | |
1da177e4 LT |
446 | } |
447 | } while (!in_value); | |
448 | ||
4be44fcd | 449 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 450 | } |
1da177e4 | 451 | |
8313524a | 452 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios) |
1da177e4 | 453 | |
44f6c012 | 454 | /******************************************************************************* |
1da177e4 | 455 | * |
c95d47a8 | 456 | * FUNCTION: acpi_leave_sleep_state_prep |
1da177e4 | 457 | * |
c95d47a8 | 458 | * PARAMETERS: sleep_state - Which sleep state we are exiting |
1da177e4 LT |
459 | * |
460 | * RETURN: Status | |
461 | * | |
c95d47a8 RW |
462 | * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a |
463 | * sleep. | |
464 | * Called with interrupts DISABLED. | |
1da177e4 LT |
465 | * |
466 | ******************************************************************************/ | |
c95d47a8 | 467 | acpi_status acpi_leave_sleep_state_prep(u8 sleep_state) |
1da177e4 | 468 | { |
4be44fcd LB |
469 | struct acpi_object_list arg_list; |
470 | union acpi_object arg; | |
471 | acpi_status status; | |
472 | struct acpi_bit_register_info *sleep_type_reg_info; | |
473 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
474 | u32 PM1Acontrol; | |
475 | u32 PM1Bcontrol; | |
1da177e4 | 476 | |
c95d47a8 | 477 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep); |
1da177e4 LT |
478 | |
479 | /* | |
480 | * Set SLP_TYPE and SLP_EN to state S0. | |
481 | * This is unclear from the ACPI Spec, but it is required | |
482 | * by some machines. | |
483 | */ | |
4be44fcd LB |
484 | status = acpi_get_sleep_type_data(ACPI_STATE_S0, |
485 | &acpi_gbl_sleep_type_a, | |
486 | &acpi_gbl_sleep_type_b); | |
487 | if (ACPI_SUCCESS(status)) { | |
488 | sleep_type_reg_info = | |
489 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A); | |
490 | sleep_enable_reg_info = | |
491 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
492 | |
493 | /* Get current value of PM1A control */ | |
494 | ||
d30dc9ab | 495 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, |
4be44fcd LB |
496 | &PM1Acontrol); |
497 | if (ACPI_SUCCESS(status)) { | |
52fc0b02 | 498 | |
1da177e4 LT |
499 | /* Clear SLP_EN and SLP_TYP fields */ |
500 | ||
501 | PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | | |
4be44fcd LB |
502 | sleep_enable_reg_info-> |
503 | access_bit_mask); | |
1da177e4 LT |
504 | PM1Bcontrol = PM1Acontrol; |
505 | ||
506 | /* Insert SLP_TYP bits */ | |
507 | ||
4be44fcd LB |
508 | PM1Acontrol |= |
509 | (acpi_gbl_sleep_type_a << sleep_type_reg_info-> | |
510 | bit_position); | |
511 | PM1Bcontrol |= | |
512 | (acpi_gbl_sleep_type_b << sleep_type_reg_info-> | |
513 | bit_position); | |
1da177e4 LT |
514 | |
515 | /* Just ignore any errors */ | |
516 | ||
d30dc9ab | 517 | (void)acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
4be44fcd | 518 | PM1Acontrol); |
d30dc9ab | 519 | (void)acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
4be44fcd | 520 | PM1Bcontrol); |
1da177e4 LT |
521 | } |
522 | } | |
523 | ||
c95d47a8 RW |
524 | /* Execute the _BFS method */ |
525 | ||
526 | arg_list.count = 1; | |
527 | arg_list.pointer = &arg; | |
528 | arg.type = ACPI_TYPE_INTEGER; | |
529 | arg.integer.value = sleep_state; | |
530 | ||
531 | status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL); | |
532 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
533 | ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS")); | |
534 | } | |
535 | ||
536 | return_ACPI_STATUS(status); | |
537 | } | |
538 | ||
539 | /******************************************************************************* | |
540 | * | |
541 | * FUNCTION: acpi_leave_sleep_state | |
542 | * | |
543 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
544 | * | |
545 | * RETURN: Status | |
546 | * | |
547 | * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep | |
548 | * Called with interrupts ENABLED. | |
549 | * | |
550 | ******************************************************************************/ | |
551 | acpi_status acpi_leave_sleep_state(u8 sleep_state) | |
552 | { | |
553 | struct acpi_object_list arg_list; | |
554 | union acpi_object arg; | |
555 | acpi_status status; | |
556 | ||
557 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state); | |
558 | ||
1da177e4 LT |
559 | /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ |
560 | ||
561 | acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; | |
562 | ||
563 | /* Setup parameter object */ | |
564 | ||
565 | arg_list.count = 1; | |
566 | arg_list.pointer = &arg; | |
567 | arg.type = ACPI_TYPE_INTEGER; | |
568 | ||
569 | /* Ignore any errors from these methods */ | |
570 | ||
571 | arg.integer.value = ACPI_SST_WAKING; | |
4be44fcd LB |
572 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
573 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 574 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
575 | } |
576 | ||
1da177e4 | 577 | /* |
79d2dfaa TR |
578 | * GPEs must be enabled before _WAK is called as GPEs |
579 | * might get fired there | |
580 | * | |
1da177e4 LT |
581 | * Restore the GPEs: |
582 | * 1) Disable/Clear all GPEs | |
583 | * 2) Enable all runtime GPEs | |
584 | */ | |
4be44fcd LB |
585 | status = acpi_hw_disable_all_gpes(); |
586 | if (ACPI_FAILURE(status)) { | |
587 | return_ACPI_STATUS(status); | |
1da177e4 | 588 | } |
4be44fcd LB |
589 | status = acpi_hw_enable_all_runtime_gpes(); |
590 | if (ACPI_FAILURE(status)) { | |
591 | return_ACPI_STATUS(status); | |
1da177e4 LT |
592 | } |
593 | ||
314ccd64 | 594 | arg.integer.value = sleep_state; |
79d2dfaa TR |
595 | status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL); |
596 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
597 | ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK")); | |
598 | } | |
599 | /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ | |
600 | ||
a68823ee MG |
601 | /* |
602 | * Some BIOSes assume that WAK_STS will be cleared on resume and use | |
603 | * it to determine whether the system is rebooting or resuming. Clear | |
604 | * it for compatibility. | |
605 | */ | |
606 | acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); | |
607 | ||
79d2dfaa TR |
608 | acpi_gbl_system_awake_and_running = TRUE; |
609 | ||
1da177e4 LT |
610 | /* Enable power button */ |
611 | ||
4be44fcd LB |
612 | (void) |
613 | acpi_set_register(acpi_gbl_fixed_event_info | |
d8c71b6d | 614 | [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1); |
44f6c012 | 615 | |
4be44fcd LB |
616 | (void) |
617 | acpi_set_register(acpi_gbl_fixed_event_info | |
d8c71b6d | 618 | [ACPI_EVENT_POWER_BUTTON].status_register_id, 1); |
1da177e4 LT |
619 | |
620 | arg.integer.value = ACPI_SST_WORKING; | |
4be44fcd LB |
621 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
622 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 623 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
624 | } |
625 | ||
4be44fcd | 626 | return_ACPI_STATUS(status); |
1da177e4 | 627 | } |
8313524a BM |
628 | |
629 | ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state) |