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