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1da177e4 LT |
1 | |
2 | /****************************************************************************** | |
3 | * | |
4 | * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
6c9deb72 | 9 | * Copyright (C) 2000 - 2007, R. Byron Moore |
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 | * | |
55 | * PARAMETERS: physical_address - Physical address of ACPI real mode | |
56 | * entry point. | |
57 | * | |
58 | * RETURN: Status | |
59 | * | |
44f6c012 | 60 | * DESCRIPTION: Access function for the firmware_waking_vector field in FACS |
1da177e4 LT |
61 | * |
62 | ******************************************************************************/ | |
1da177e4 | 63 | acpi_status |
4be44fcd | 64 | acpi_set_firmware_waking_vector(acpi_physical_address physical_address) |
1da177e4 | 65 | { |
f3d2e786 BM |
66 | struct acpi_table_facs *facs; |
67 | acpi_status status; | |
1da177e4 | 68 | |
b229cf92 | 69 | ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector); |
1da177e4 | 70 | |
f3d2e786 BM |
71 | /* Get the FACS */ |
72 | ||
73 | status = | |
74 | acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS, | |
75 | (struct acpi_table_header **)&facs); | |
76 | if (ACPI_FAILURE(status)) { | |
77 | return_ACPI_STATUS(status); | |
78 | } | |
79 | ||
1da177e4 LT |
80 | /* Set the vector */ |
81 | ||
f3d2e786 BM |
82 | if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) { |
83 | /* | |
84 | * ACPI 1.0 FACS or short table or optional X_ field is zero | |
85 | */ | |
86 | facs->firmware_waking_vector = (u32) physical_address; | |
4be44fcd | 87 | } else { |
f3d2e786 BM |
88 | /* |
89 | * ACPI 2.0 FACS with valid X_ field | |
90 | */ | |
91 | facs->xfirmware_waking_vector = physical_address; | |
1da177e4 LT |
92 | } |
93 | ||
4be44fcd | 94 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
95 | } |
96 | ||
8313524a BM |
97 | ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector) |
98 | ||
44f6c012 | 99 | /******************************************************************************* |
1da177e4 LT |
100 | * |
101 | * FUNCTION: acpi_get_firmware_waking_vector | |
102 | * | |
44f6c012 | 103 | * PARAMETERS: *physical_address - Where the contents of |
1da177e4 | 104 | * the firmware_waking_vector field of |
44f6c012 | 105 | * the FACS will be returned. |
1da177e4 | 106 | * |
44f6c012 | 107 | * RETURN: Status, vector |
1da177e4 | 108 | * |
44f6c012 | 109 | * DESCRIPTION: Access function for the firmware_waking_vector field in FACS |
1da177e4 LT |
110 | * |
111 | ******************************************************************************/ | |
112 | #ifdef ACPI_FUTURE_USAGE | |
113 | acpi_status | |
4be44fcd | 114 | acpi_get_firmware_waking_vector(acpi_physical_address * physical_address) |
1da177e4 | 115 | { |
f3d2e786 BM |
116 | struct acpi_table_facs *facs; |
117 | acpi_status status; | |
1da177e4 | 118 | |
b229cf92 | 119 | ACPI_FUNCTION_TRACE(acpi_get_firmware_waking_vector); |
1da177e4 LT |
120 | |
121 | if (!physical_address) { | |
4be44fcd | 122 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
123 | } |
124 | ||
f3d2e786 BM |
125 | /* Get the FACS */ |
126 | ||
127 | status = | |
128 | acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS, | |
129 | (struct acpi_table_header **)&facs); | |
130 | if (ACPI_FAILURE(status)) { | |
131 | return_ACPI_STATUS(status); | |
132 | } | |
133 | ||
1da177e4 LT |
134 | /* Get the vector */ |
135 | ||
f3d2e786 BM |
136 | if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) { |
137 | /* | |
138 | * ACPI 1.0 FACS or short table or optional X_ field is zero | |
139 | */ | |
140 | *physical_address = | |
141 | (acpi_physical_address) facs->firmware_waking_vector; | |
4be44fcd | 142 | } else { |
f3d2e786 BM |
143 | /* |
144 | * ACPI 2.0 FACS with valid X_ field | |
145 | */ | |
1da177e4 | 146 | *physical_address = |
f3d2e786 | 147 | (acpi_physical_address) facs->xfirmware_waking_vector; |
1da177e4 LT |
148 | } |
149 | ||
4be44fcd | 150 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 151 | } |
8313524a BM |
152 | |
153 | ACPI_EXPORT_SYMBOL(acpi_get_firmware_waking_vector) | |
1da177e4 | 154 | #endif |
44f6c012 | 155 | /******************************************************************************* |
1da177e4 LT |
156 | * |
157 | * FUNCTION: acpi_enter_sleep_state_prep | |
158 | * | |
159 | * PARAMETERS: sleep_state - Which sleep state to enter | |
160 | * | |
161 | * RETURN: Status | |
162 | * | |
163 | * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231) | |
164 | * This function must execute with interrupts enabled. | |
165 | * We break sleeping into 2 stages so that OSPM can handle | |
166 | * various OS-specific tasks between the two steps. | |
167 | * | |
168 | ******************************************************************************/ | |
4be44fcd | 169 | acpi_status acpi_enter_sleep_state_prep(u8 sleep_state) |
1da177e4 | 170 | { |
4be44fcd LB |
171 | acpi_status status; |
172 | struct acpi_object_list arg_list; | |
173 | union acpi_object arg; | |
1da177e4 | 174 | |
b229cf92 | 175 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep); |
1da177e4 LT |
176 | |
177 | /* | |
178 | * _PSW methods could be run here to enable wake-on keyboard, LAN, etc. | |
179 | */ | |
4be44fcd LB |
180 | status = acpi_get_sleep_type_data(sleep_state, |
181 | &acpi_gbl_sleep_type_a, | |
182 | &acpi_gbl_sleep_type_b); | |
183 | if (ACPI_FAILURE(status)) { | |
184 | return_ACPI_STATUS(status); | |
1da177e4 LT |
185 | } |
186 | ||
187 | /* Setup parameter object */ | |
188 | ||
189 | arg_list.count = 1; | |
190 | arg_list.pointer = &arg; | |
191 | ||
192 | arg.type = ACPI_TYPE_INTEGER; | |
193 | arg.integer.value = sleep_state; | |
194 | ||
195 | /* Run the _PTS and _GTS methods */ | |
196 | ||
4be44fcd LB |
197 | status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL); |
198 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
199 | return_ACPI_STATUS(status); | |
1da177e4 LT |
200 | } |
201 | ||
4be44fcd LB |
202 | status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL); |
203 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
204 | return_ACPI_STATUS(status); | |
1da177e4 LT |
205 | } |
206 | ||
207 | /* Setup the argument to _SST */ | |
208 | ||
209 | switch (sleep_state) { | |
210 | case ACPI_STATE_S0: | |
211 | arg.integer.value = ACPI_SST_WORKING; | |
212 | break; | |
213 | ||
214 | case ACPI_STATE_S1: | |
215 | case ACPI_STATE_S2: | |
216 | case ACPI_STATE_S3: | |
217 | arg.integer.value = ACPI_SST_SLEEPING; | |
218 | break; | |
219 | ||
220 | case ACPI_STATE_S4: | |
221 | arg.integer.value = ACPI_SST_SLEEP_CONTEXT; | |
222 | break; | |
223 | ||
224 | default: | |
4be44fcd | 225 | arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */ |
1da177e4 LT |
226 | break; |
227 | } | |
228 | ||
229 | /* Set the system indicators to show the desired sleep state. */ | |
230 | ||
4be44fcd LB |
231 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
232 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 BM |
233 | ACPI_EXCEPTION((AE_INFO, status, |
234 | "While executing method _SST")); | |
1da177e4 LT |
235 | } |
236 | ||
6cffd466 RW |
237 | /* Disable/Clear all GPEs */ |
238 | ||
ed41dab9 | 239 | status = acpi_hw_disable_all_gpes(); |
ed41dab9 | 240 | |
6cffd466 | 241 | return_ACPI_STATUS(status); |
1da177e4 LT |
242 | } |
243 | ||
8313524a BM |
244 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep) |
245 | ||
44f6c012 | 246 | /******************************************************************************* |
1da177e4 LT |
247 | * |
248 | * FUNCTION: acpi_enter_sleep_state | |
249 | * | |
250 | * PARAMETERS: sleep_state - Which sleep state to enter | |
251 | * | |
252 | * RETURN: Status | |
253 | * | |
254 | * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231) | |
255 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
256 | * | |
257 | ******************************************************************************/ | |
4be44fcd | 258 | acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state) |
1da177e4 | 259 | { |
4be44fcd LB |
260 | u32 PM1Acontrol; |
261 | u32 PM1Bcontrol; | |
262 | struct acpi_bit_register_info *sleep_type_reg_info; | |
263 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
264 | u32 in_value; | |
265 | acpi_status status; | |
1da177e4 | 266 | |
b229cf92 | 267 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state); |
1da177e4 LT |
268 | |
269 | if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) || | |
4be44fcd | 270 | (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) { |
b8e4d893 BM |
271 | ACPI_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X", |
272 | acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b)); | |
4be44fcd | 273 | return_ACPI_STATUS(AE_AML_OPERAND_VALUE); |
1da177e4 LT |
274 | } |
275 | ||
4be44fcd LB |
276 | sleep_type_reg_info = |
277 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A); | |
278 | sleep_enable_reg_info = | |
279 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
280 | |
281 | /* Clear wake status */ | |
282 | ||
d8c71b6d | 283 | status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); |
4be44fcd LB |
284 | if (ACPI_FAILURE(status)) { |
285 | return_ACPI_STATUS(status); | |
1da177e4 LT |
286 | } |
287 | ||
288 | /* Clear all fixed and general purpose status bits */ | |
289 | ||
d8c71b6d | 290 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
291 | if (ACPI_FAILURE(status)) { |
292 | return_ACPI_STATUS(status); | |
1da177e4 LT |
293 | } |
294 | ||
295 | /* | |
1da177e4 LT |
296 | * 2) Enable all wakeup GPEs |
297 | */ | |
1d99967b AS |
298 | status = acpi_hw_disable_all_gpes(); |
299 | if (ACPI_FAILURE(status)) { | |
300 | return_ACPI_STATUS(status); | |
301 | } | |
302 | ||
1da177e4 LT |
303 | acpi_gbl_system_awake_and_running = FALSE; |
304 | ||
4be44fcd LB |
305 | status = acpi_hw_enable_all_wakeup_gpes(); |
306 | if (ACPI_FAILURE(status)) { | |
307 | return_ACPI_STATUS(status); | |
1da177e4 LT |
308 | } |
309 | ||
310 | /* Get current value of PM1A control */ | |
311 | ||
d30dc9ab | 312 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol); |
4be44fcd LB |
313 | if (ACPI_FAILURE(status)) { |
314 | return_ACPI_STATUS(status); | |
1da177e4 | 315 | } |
4be44fcd LB |
316 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
317 | "Entering sleep state [S%d]\n", sleep_state)); | |
1da177e4 LT |
318 | |
319 | /* Clear SLP_EN and SLP_TYP fields */ | |
320 | ||
44f6c012 | 321 | PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | |
4be44fcd | 322 | sleep_enable_reg_info->access_bit_mask); |
1da177e4 LT |
323 | PM1Bcontrol = PM1Acontrol; |
324 | ||
325 | /* Insert SLP_TYP bits */ | |
326 | ||
4be44fcd LB |
327 | PM1Acontrol |= |
328 | (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); | |
329 | PM1Bcontrol |= | |
330 | (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position); | |
1da177e4 LT |
331 | |
332 | /* | |
333 | * We split the writes of SLP_TYP and SLP_EN to workaround | |
334 | * poorly implemented hardware. | |
335 | */ | |
336 | ||
337 | /* Write #1: fill in SLP_TYP data */ | |
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 | /* Insert SLP_ENABLE bit */ | |
352 | ||
353 | PM1Acontrol |= sleep_enable_reg_info->access_bit_mask; | |
354 | PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask; | |
355 | ||
356 | /* Write #2: SLP_TYP + SLP_EN */ | |
357 | ||
4be44fcd | 358 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 359 | |
d30dc9ab | 360 | status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
4be44fcd LB |
361 | PM1Acontrol); |
362 | if (ACPI_FAILURE(status)) { | |
363 | return_ACPI_STATUS(status); | |
1da177e4 LT |
364 | } |
365 | ||
d30dc9ab | 366 | status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
4be44fcd LB |
367 | PM1Bcontrol); |
368 | if (ACPI_FAILURE(status)) { | |
369 | return_ACPI_STATUS(status); | |
1da177e4 LT |
370 | } |
371 | ||
372 | if (sleep_state > ACPI_STATE_S3) { | |
373 | /* | |
44f6c012 RM |
374 | * We wanted to sleep > S3, but it didn't happen (by virtue of the |
375 | * fact that we are still executing!) | |
1da177e4 | 376 | * |
44f6c012 RM |
377 | * Wait ten seconds, then try again. This is to get S4/S5 to work on |
378 | * all machines. | |
1da177e4 LT |
379 | * |
380 | * We wait so long to allow chipsets that poll this reg very slowly to | |
381 | * still read the right value. Ideally, this block would go | |
382 | * away entirely. | |
383 | */ | |
4be44fcd LB |
384 | acpi_os_stall(10000000); |
385 | ||
d30dc9ab | 386 | status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL, |
4be44fcd LB |
387 | sleep_enable_reg_info-> |
388 | access_bit_mask); | |
389 | if (ACPI_FAILURE(status)) { | |
390 | return_ACPI_STATUS(status); | |
1da177e4 LT |
391 | } |
392 | } | |
393 | ||
394 | /* Wait until we enter sleep state */ | |
395 | ||
396 | do { | |
2d571b33 AS |
397 | status = acpi_get_register_unlocked(ACPI_BITREG_WAKE_STATUS, |
398 | &in_value); | |
4be44fcd LB |
399 | if (ACPI_FAILURE(status)) { |
400 | return_ACPI_STATUS(status); | |
1da177e4 LT |
401 | } |
402 | ||
403 | /* Spin until we wake */ | |
404 | ||
405 | } while (!in_value); | |
406 | ||
4be44fcd | 407 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 408 | } |
1da177e4 | 409 | |
8313524a | 410 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state) |
1da177e4 | 411 | |
44f6c012 | 412 | /******************************************************************************* |
1da177e4 LT |
413 | * |
414 | * FUNCTION: acpi_enter_sleep_state_s4bios | |
415 | * | |
416 | * PARAMETERS: None | |
417 | * | |
418 | * RETURN: Status | |
419 | * | |
420 | * DESCRIPTION: Perform a S4 bios request. | |
421 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
422 | * | |
423 | ******************************************************************************/ | |
4be44fcd | 424 | acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void) |
1da177e4 | 425 | { |
4be44fcd LB |
426 | u32 in_value; |
427 | acpi_status status; | |
1da177e4 | 428 | |
b229cf92 | 429 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios); |
1da177e4 | 430 | |
d8c71b6d | 431 | status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); |
4be44fcd LB |
432 | if (ACPI_FAILURE(status)) { |
433 | return_ACPI_STATUS(status); | |
1da177e4 LT |
434 | } |
435 | ||
d8c71b6d | 436 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
437 | if (ACPI_FAILURE(status)) { |
438 | return_ACPI_STATUS(status); | |
1da177e4 LT |
439 | } |
440 | ||
441 | /* | |
442 | * 1) Disable/Clear all GPEs | |
443 | * 2) Enable all wakeup GPEs | |
444 | */ | |
4be44fcd LB |
445 | status = acpi_hw_disable_all_gpes(); |
446 | if (ACPI_FAILURE(status)) { | |
447 | return_ACPI_STATUS(status); | |
1da177e4 LT |
448 | } |
449 | acpi_gbl_system_awake_and_running = FALSE; | |
450 | ||
4be44fcd LB |
451 | status = acpi_hw_enable_all_wakeup_gpes(); |
452 | if (ACPI_FAILURE(status)) { | |
453 | return_ACPI_STATUS(status); | |
1da177e4 LT |
454 | } |
455 | ||
4be44fcd | 456 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 457 | |
f3d2e786 BM |
458 | status = acpi_os_write_port(acpi_gbl_FADT.smi_command, |
459 | (u32) acpi_gbl_FADT.S4bios_request, 8); | |
1da177e4 LT |
460 | |
461 | do { | |
462 | acpi_os_stall(1000); | |
d8c71b6d | 463 | status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value); |
4be44fcd LB |
464 | if (ACPI_FAILURE(status)) { |
465 | return_ACPI_STATUS(status); | |
1da177e4 LT |
466 | } |
467 | } while (!in_value); | |
468 | ||
4be44fcd | 469 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 470 | } |
1da177e4 | 471 | |
8313524a | 472 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios) |
1da177e4 | 473 | |
44f6c012 | 474 | /******************************************************************************* |
1da177e4 LT |
475 | * |
476 | * FUNCTION: acpi_leave_sleep_state | |
477 | * | |
478 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
479 | * | |
480 | * RETURN: Status | |
481 | * | |
482 | * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep | |
483 | * Called with interrupts ENABLED. | |
484 | * | |
485 | ******************************************************************************/ | |
4be44fcd | 486 | acpi_status acpi_leave_sleep_state(u8 sleep_state) |
1da177e4 | 487 | { |
4be44fcd LB |
488 | struct acpi_object_list arg_list; |
489 | union acpi_object arg; | |
490 | acpi_status status; | |
491 | struct acpi_bit_register_info *sleep_type_reg_info; | |
492 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
493 | u32 PM1Acontrol; | |
494 | u32 PM1Bcontrol; | |
1da177e4 | 495 | |
b229cf92 | 496 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state); |
1da177e4 LT |
497 | |
498 | /* | |
499 | * Set SLP_TYPE and SLP_EN to state S0. | |
500 | * This is unclear from the ACPI Spec, but it is required | |
501 | * by some machines. | |
502 | */ | |
4be44fcd LB |
503 | status = acpi_get_sleep_type_data(ACPI_STATE_S0, |
504 | &acpi_gbl_sleep_type_a, | |
505 | &acpi_gbl_sleep_type_b); | |
506 | if (ACPI_SUCCESS(status)) { | |
507 | sleep_type_reg_info = | |
508 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A); | |
509 | sleep_enable_reg_info = | |
510 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
511 | |
512 | /* Get current value of PM1A control */ | |
513 | ||
d30dc9ab | 514 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, |
4be44fcd LB |
515 | &PM1Acontrol); |
516 | if (ACPI_SUCCESS(status)) { | |
52fc0b02 | 517 | |
1da177e4 LT |
518 | /* Clear SLP_EN and SLP_TYP fields */ |
519 | ||
520 | PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | | |
4be44fcd LB |
521 | sleep_enable_reg_info-> |
522 | access_bit_mask); | |
1da177e4 LT |
523 | PM1Bcontrol = PM1Acontrol; |
524 | ||
525 | /* Insert SLP_TYP bits */ | |
526 | ||
4be44fcd LB |
527 | PM1Acontrol |= |
528 | (acpi_gbl_sleep_type_a << sleep_type_reg_info-> | |
529 | bit_position); | |
530 | PM1Bcontrol |= | |
531 | (acpi_gbl_sleep_type_b << sleep_type_reg_info-> | |
532 | bit_position); | |
1da177e4 LT |
533 | |
534 | /* Just ignore any errors */ | |
535 | ||
d30dc9ab | 536 | (void)acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
4be44fcd | 537 | PM1Acontrol); |
d30dc9ab | 538 | (void)acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
4be44fcd | 539 | PM1Bcontrol); |
1da177e4 LT |
540 | } |
541 | } | |
542 | ||
543 | /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ | |
544 | ||
545 | acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; | |
546 | ||
547 | /* Setup parameter object */ | |
548 | ||
549 | arg_list.count = 1; | |
550 | arg_list.pointer = &arg; | |
551 | arg.type = ACPI_TYPE_INTEGER; | |
552 | ||
553 | /* Ignore any errors from these methods */ | |
554 | ||
555 | arg.integer.value = ACPI_SST_WAKING; | |
4be44fcd LB |
556 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
557 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 558 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
559 | } |
560 | ||
561 | arg.integer.value = sleep_state; | |
4be44fcd LB |
562 | status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL); |
563 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 564 | ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS")); |
1da177e4 LT |
565 | } |
566 | ||
1da177e4 | 567 | /* |
79d2dfaa TR |
568 | * GPEs must be enabled before _WAK is called as GPEs |
569 | * might get fired there | |
570 | * | |
1da177e4 LT |
571 | * Restore the GPEs: |
572 | * 1) Disable/Clear all GPEs | |
573 | * 2) Enable all runtime GPEs | |
574 | */ | |
4be44fcd LB |
575 | status = acpi_hw_disable_all_gpes(); |
576 | if (ACPI_FAILURE(status)) { | |
577 | return_ACPI_STATUS(status); | |
1da177e4 | 578 | } |
4be44fcd LB |
579 | status = acpi_hw_enable_all_runtime_gpes(); |
580 | if (ACPI_FAILURE(status)) { | |
581 | return_ACPI_STATUS(status); | |
1da177e4 LT |
582 | } |
583 | ||
79d2dfaa TR |
584 | status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL); |
585 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
586 | ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK")); | |
587 | } | |
588 | /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ | |
589 | ||
590 | acpi_gbl_system_awake_and_running = TRUE; | |
591 | ||
1da177e4 LT |
592 | /* Enable power button */ |
593 | ||
4be44fcd LB |
594 | (void) |
595 | acpi_set_register(acpi_gbl_fixed_event_info | |
d8c71b6d | 596 | [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1); |
44f6c012 | 597 | |
4be44fcd LB |
598 | (void) |
599 | acpi_set_register(acpi_gbl_fixed_event_info | |
d8c71b6d | 600 | [ACPI_EVENT_POWER_BUTTON].status_register_id, 1); |
1da177e4 LT |
601 | |
602 | arg.integer.value = ACPI_SST_WORKING; | |
4be44fcd LB |
603 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
604 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 605 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
606 | } |
607 | ||
4be44fcd | 608 | return_ACPI_STATUS(status); |
1da177e4 | 609 | } |
8313524a BM |
610 | |
611 | ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state) |