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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> |
e2f7a777 LB |
46 | #include "accommon.h" |
47 | #include "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 | 149 | |
32c9ef99 BM |
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 | { |
32c9ef99 BM |
225 | u32 pm1a_control; |
226 | u32 pm1b_control; | |
4be44fcd LB |
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 | 243 | sleep_type_reg_info = |
82d79b86 | 244 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE); |
4be44fcd LB |
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 | ||
32c9ef99 BM |
291 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, |
292 | &pm1a_control); | |
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 | 298 | |
32c9ef99 | 299 | /* Clear the SLP_EN and SLP_TYP fields */ |
1da177e4 | 300 | |
32c9ef99 BM |
301 | pm1a_control &= ~(sleep_type_reg_info->access_bit_mask | |
302 | sleep_enable_reg_info->access_bit_mask); | |
303 | pm1b_control = pm1a_control; | |
1da177e4 | 304 | |
32c9ef99 | 305 | /* Insert the SLP_TYP bits */ |
1da177e4 | 306 | |
32c9ef99 | 307 | pm1a_control |= |
4be44fcd | 308 | (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); |
32c9ef99 | 309 | pm1b_control |= |
4be44fcd | 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 | ||
32c9ef99 | 317 | /* Write #1: write the SLP_TYP data to the PM1 Control registers */ |
1da177e4 | 318 | |
32c9ef99 | 319 | status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); |
4be44fcd LB |
320 | if (ACPI_FAILURE(status)) { |
321 | return_ACPI_STATUS(status); | |
1da177e4 LT |
322 | } |
323 | ||
32c9ef99 | 324 | /* Insert the sleep enable (SLP_EN) bit */ |
1da177e4 | 325 | |
32c9ef99 BM |
326 | pm1a_control |= sleep_enable_reg_info->access_bit_mask; |
327 | pm1b_control |= sleep_enable_reg_info->access_bit_mask; | |
1da177e4 | 328 | |
32c9ef99 | 329 | /* Flush caches, as per ACPI specification */ |
1da177e4 | 330 | |
4be44fcd | 331 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 332 | |
32c9ef99 | 333 | /* Write #2: Write both SLP_TYP + SLP_EN */ |
1da177e4 | 334 | |
32c9ef99 | 335 | status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); |
4be44fcd LB |
336 | if (ACPI_FAILURE(status)) { |
337 | return_ACPI_STATUS(status); | |
1da177e4 LT |
338 | } |
339 | ||
340 | if (sleep_state > ACPI_STATE_S3) { | |
341 | /* | |
44f6c012 RM |
342 | * We wanted to sleep > S3, but it didn't happen (by virtue of the |
343 | * fact that we are still executing!) | |
1da177e4 | 344 | * |
44f6c012 RM |
345 | * Wait ten seconds, then try again. This is to get S4/S5 to work on |
346 | * all machines. | |
1da177e4 LT |
347 | * |
348 | * We wait so long to allow chipsets that poll this reg very slowly to | |
349 | * still read the right value. Ideally, this block would go | |
350 | * away entirely. | |
351 | */ | |
4be44fcd LB |
352 | acpi_os_stall(10000000); |
353 | ||
d30dc9ab | 354 | status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL, |
4be44fcd LB |
355 | sleep_enable_reg_info-> |
356 | access_bit_mask); | |
357 | if (ACPI_FAILURE(status)) { | |
358 | return_ACPI_STATUS(status); | |
1da177e4 LT |
359 | } |
360 | } | |
361 | ||
362 | /* Wait until we enter sleep state */ | |
363 | ||
364 | do { | |
2d571b33 AS |
365 | status = acpi_get_register_unlocked(ACPI_BITREG_WAKE_STATUS, |
366 | &in_value); | |
4be44fcd LB |
367 | if (ACPI_FAILURE(status)) { |
368 | return_ACPI_STATUS(status); | |
1da177e4 LT |
369 | } |
370 | ||
371 | /* Spin until we wake */ | |
372 | ||
373 | } while (!in_value); | |
374 | ||
4be44fcd | 375 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 376 | } |
1da177e4 | 377 | |
8313524a | 378 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state) |
1da177e4 | 379 | |
44f6c012 | 380 | /******************************************************************************* |
1da177e4 LT |
381 | * |
382 | * FUNCTION: acpi_enter_sleep_state_s4bios | |
383 | * | |
384 | * PARAMETERS: None | |
385 | * | |
386 | * RETURN: Status | |
387 | * | |
388 | * DESCRIPTION: Perform a S4 bios request. | |
389 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
390 | * | |
391 | ******************************************************************************/ | |
4be44fcd | 392 | acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void) |
1da177e4 | 393 | { |
4be44fcd LB |
394 | u32 in_value; |
395 | acpi_status status; | |
1da177e4 | 396 | |
b229cf92 | 397 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios); |
1da177e4 | 398 | |
d8c71b6d | 399 | status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); |
4be44fcd LB |
400 | if (ACPI_FAILURE(status)) { |
401 | return_ACPI_STATUS(status); | |
1da177e4 LT |
402 | } |
403 | ||
d8c71b6d | 404 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
405 | if (ACPI_FAILURE(status)) { |
406 | return_ACPI_STATUS(status); | |
1da177e4 LT |
407 | } |
408 | ||
409 | /* | |
410 | * 1) Disable/Clear all GPEs | |
411 | * 2) Enable all wakeup GPEs | |
412 | */ | |
4be44fcd LB |
413 | status = acpi_hw_disable_all_gpes(); |
414 | if (ACPI_FAILURE(status)) { | |
415 | return_ACPI_STATUS(status); | |
1da177e4 LT |
416 | } |
417 | acpi_gbl_system_awake_and_running = FALSE; | |
418 | ||
4be44fcd LB |
419 | status = acpi_hw_enable_all_wakeup_gpes(); |
420 | if (ACPI_FAILURE(status)) { | |
421 | return_ACPI_STATUS(status); | |
1da177e4 LT |
422 | } |
423 | ||
4be44fcd | 424 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 425 | |
f3d2e786 BM |
426 | status = acpi_os_write_port(acpi_gbl_FADT.smi_command, |
427 | (u32) acpi_gbl_FADT.S4bios_request, 8); | |
1da177e4 LT |
428 | |
429 | do { | |
430 | acpi_os_stall(1000); | |
d8c71b6d | 431 | status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value); |
4be44fcd LB |
432 | if (ACPI_FAILURE(status)) { |
433 | return_ACPI_STATUS(status); | |
1da177e4 LT |
434 | } |
435 | } while (!in_value); | |
436 | ||
4be44fcd | 437 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 438 | } |
1da177e4 | 439 | |
8313524a | 440 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios) |
1da177e4 | 441 | |
44f6c012 | 442 | /******************************************************************************* |
1da177e4 | 443 | * |
c95d47a8 | 444 | * FUNCTION: acpi_leave_sleep_state_prep |
1da177e4 | 445 | * |
c95d47a8 | 446 | * PARAMETERS: sleep_state - Which sleep state we are exiting |
1da177e4 LT |
447 | * |
448 | * RETURN: Status | |
449 | * | |
c95d47a8 RW |
450 | * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a |
451 | * sleep. | |
452 | * Called with interrupts DISABLED. | |
1da177e4 LT |
453 | * |
454 | ******************************************************************************/ | |
c95d47a8 | 455 | acpi_status acpi_leave_sleep_state_prep(u8 sleep_state) |
1da177e4 | 456 | { |
4be44fcd LB |
457 | struct acpi_object_list arg_list; |
458 | union acpi_object arg; | |
459 | acpi_status status; | |
460 | struct acpi_bit_register_info *sleep_type_reg_info; | |
461 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
32c9ef99 BM |
462 | u32 pm1a_control; |
463 | u32 pm1b_control; | |
1da177e4 | 464 | |
c95d47a8 | 465 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep); |
1da177e4 LT |
466 | |
467 | /* | |
468 | * Set SLP_TYPE and SLP_EN to state S0. | |
469 | * This is unclear from the ACPI Spec, but it is required | |
470 | * by some machines. | |
471 | */ | |
4be44fcd LB |
472 | status = acpi_get_sleep_type_data(ACPI_STATE_S0, |
473 | &acpi_gbl_sleep_type_a, | |
474 | &acpi_gbl_sleep_type_b); | |
475 | if (ACPI_SUCCESS(status)) { | |
476 | sleep_type_reg_info = | |
82d79b86 | 477 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE); |
4be44fcd LB |
478 | sleep_enable_reg_info = |
479 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
480 | |
481 | /* Get current value of PM1A control */ | |
482 | ||
d30dc9ab | 483 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, |
32c9ef99 | 484 | &pm1a_control); |
4be44fcd | 485 | if (ACPI_SUCCESS(status)) { |
52fc0b02 | 486 | |
32c9ef99 | 487 | /* Clear the SLP_EN and SLP_TYP fields */ |
1da177e4 | 488 | |
32c9ef99 BM |
489 | pm1a_control &= ~(sleep_type_reg_info->access_bit_mask | |
490 | sleep_enable_reg_info-> | |
491 | access_bit_mask); | |
492 | pm1b_control = pm1a_control; | |
1da177e4 | 493 | |
32c9ef99 | 494 | /* Insert the SLP_TYP bits */ |
1da177e4 | 495 | |
32c9ef99 | 496 | pm1a_control |= |
4be44fcd LB |
497 | (acpi_gbl_sleep_type_a << sleep_type_reg_info-> |
498 | bit_position); | |
32c9ef99 | 499 | pm1b_control |= |
4be44fcd LB |
500 | (acpi_gbl_sleep_type_b << sleep_type_reg_info-> |
501 | bit_position); | |
1da177e4 | 502 | |
32c9ef99 | 503 | /* Write the control registers and ignore any errors */ |
1da177e4 | 504 | |
32c9ef99 BM |
505 | (void)acpi_hw_write_pm1_control(pm1a_control, |
506 | pm1b_control); | |
1da177e4 LT |
507 | } |
508 | } | |
509 | ||
c95d47a8 RW |
510 | /* Execute the _BFS method */ |
511 | ||
512 | arg_list.count = 1; | |
513 | arg_list.pointer = &arg; | |
514 | arg.type = ACPI_TYPE_INTEGER; | |
515 | arg.integer.value = sleep_state; | |
516 | ||
517 | status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL); | |
518 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
519 | ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS")); | |
520 | } | |
521 | ||
522 | return_ACPI_STATUS(status); | |
523 | } | |
524 | ||
525 | /******************************************************************************* | |
526 | * | |
527 | * FUNCTION: acpi_leave_sleep_state | |
528 | * | |
529 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
530 | * | |
531 | * RETURN: Status | |
532 | * | |
533 | * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep | |
534 | * Called with interrupts ENABLED. | |
535 | * | |
536 | ******************************************************************************/ | |
537 | acpi_status acpi_leave_sleep_state(u8 sleep_state) | |
538 | { | |
539 | struct acpi_object_list arg_list; | |
540 | union acpi_object arg; | |
541 | acpi_status status; | |
542 | ||
543 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state); | |
544 | ||
1da177e4 LT |
545 | /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ |
546 | ||
547 | acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; | |
548 | ||
549 | /* Setup parameter object */ | |
550 | ||
551 | arg_list.count = 1; | |
552 | arg_list.pointer = &arg; | |
553 | arg.type = ACPI_TYPE_INTEGER; | |
554 | ||
555 | /* Ignore any errors from these methods */ | |
556 | ||
557 | arg.integer.value = ACPI_SST_WAKING; | |
4be44fcd LB |
558 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
559 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 560 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
561 | } |
562 | ||
1da177e4 | 563 | /* |
79d2dfaa TR |
564 | * GPEs must be enabled before _WAK is called as GPEs |
565 | * might get fired there | |
566 | * | |
1da177e4 LT |
567 | * Restore the GPEs: |
568 | * 1) Disable/Clear all GPEs | |
569 | * 2) Enable all runtime GPEs | |
570 | */ | |
4be44fcd LB |
571 | status = acpi_hw_disable_all_gpes(); |
572 | if (ACPI_FAILURE(status)) { | |
573 | return_ACPI_STATUS(status); | |
1da177e4 | 574 | } |
4be44fcd LB |
575 | status = acpi_hw_enable_all_runtime_gpes(); |
576 | if (ACPI_FAILURE(status)) { | |
577 | return_ACPI_STATUS(status); | |
1da177e4 LT |
578 | } |
579 | ||
314ccd64 | 580 | arg.integer.value = sleep_state; |
79d2dfaa TR |
581 | status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL); |
582 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
583 | ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK")); | |
584 | } | |
585 | /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ | |
586 | ||
a68823ee MG |
587 | /* |
588 | * Some BIOSes assume that WAK_STS will be cleared on resume and use | |
589 | * it to determine whether the system is rebooting or resuming. Clear | |
590 | * it for compatibility. | |
591 | */ | |
592 | acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); | |
593 | ||
79d2dfaa TR |
594 | acpi_gbl_system_awake_and_running = TRUE; |
595 | ||
1da177e4 LT |
596 | /* Enable power button */ |
597 | ||
4be44fcd LB |
598 | (void) |
599 | acpi_set_register(acpi_gbl_fixed_event_info | |
d8c71b6d | 600 | [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1); |
44f6c012 | 601 | |
4be44fcd LB |
602 | (void) |
603 | acpi_set_register(acpi_gbl_fixed_event_info | |
d8c71b6d | 604 | [ACPI_EVENT_POWER_BUTTON].status_register_id, 1); |
1da177e4 LT |
605 | |
606 | arg.integer.value = ACPI_SST_WORKING; | |
4be44fcd LB |
607 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
608 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 609 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
610 | } |
611 | ||
4be44fcd | 612 | return_ACPI_STATUS(status); |
1da177e4 | 613 | } |
8313524a BM |
614 | |
615 | ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state) |