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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 | ||
ed41dab9 AS |
237 | /* |
238 | * 1) Disable/Clear all GPEs | |
239 | */ | |
240 | status = acpi_hw_disable_all_gpes(); | |
241 | if (ACPI_FAILURE(status)) { | |
242 | return_ACPI_STATUS(status); | |
243 | } | |
244 | ||
4be44fcd | 245 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
246 | } |
247 | ||
8313524a BM |
248 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep) |
249 | ||
44f6c012 | 250 | /******************************************************************************* |
1da177e4 LT |
251 | * |
252 | * FUNCTION: acpi_enter_sleep_state | |
253 | * | |
254 | * PARAMETERS: sleep_state - Which sleep state to enter | |
255 | * | |
256 | * RETURN: Status | |
257 | * | |
258 | * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231) | |
259 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
260 | * | |
261 | ******************************************************************************/ | |
4be44fcd | 262 | acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state) |
1da177e4 | 263 | { |
4be44fcd LB |
264 | u32 PM1Acontrol; |
265 | u32 PM1Bcontrol; | |
266 | struct acpi_bit_register_info *sleep_type_reg_info; | |
267 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
268 | u32 in_value; | |
269 | acpi_status status; | |
1da177e4 | 270 | |
b229cf92 | 271 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state); |
1da177e4 LT |
272 | |
273 | if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) || | |
4be44fcd | 274 | (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) { |
b8e4d893 BM |
275 | ACPI_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X", |
276 | acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b)); | |
4be44fcd | 277 | return_ACPI_STATUS(AE_AML_OPERAND_VALUE); |
1da177e4 LT |
278 | } |
279 | ||
4be44fcd LB |
280 | sleep_type_reg_info = |
281 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A); | |
282 | sleep_enable_reg_info = | |
283 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
284 | |
285 | /* Clear wake status */ | |
286 | ||
d8c71b6d | 287 | status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); |
4be44fcd LB |
288 | if (ACPI_FAILURE(status)) { |
289 | return_ACPI_STATUS(status); | |
1da177e4 LT |
290 | } |
291 | ||
292 | /* Clear all fixed and general purpose status bits */ | |
293 | ||
d8c71b6d | 294 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
295 | if (ACPI_FAILURE(status)) { |
296 | return_ACPI_STATUS(status); | |
1da177e4 LT |
297 | } |
298 | ||
299 | /* | |
1da177e4 LT |
300 | * 2) Enable all wakeup GPEs |
301 | */ | |
1d99967b AS |
302 | status = acpi_hw_disable_all_gpes(); |
303 | if (ACPI_FAILURE(status)) { | |
304 | return_ACPI_STATUS(status); | |
305 | } | |
306 | ||
1da177e4 LT |
307 | acpi_gbl_system_awake_and_running = FALSE; |
308 | ||
4be44fcd LB |
309 | status = acpi_hw_enable_all_wakeup_gpes(); |
310 | if (ACPI_FAILURE(status)) { | |
311 | return_ACPI_STATUS(status); | |
1da177e4 LT |
312 | } |
313 | ||
314 | /* Get current value of PM1A control */ | |
315 | ||
4be44fcd LB |
316 | status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
317 | ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol); | |
318 | if (ACPI_FAILURE(status)) { | |
319 | return_ACPI_STATUS(status); | |
1da177e4 | 320 | } |
4be44fcd LB |
321 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
322 | "Entering sleep state [S%d]\n", sleep_state)); | |
1da177e4 LT |
323 | |
324 | /* Clear SLP_EN and SLP_TYP fields */ | |
325 | ||
44f6c012 | 326 | PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | |
4be44fcd | 327 | sleep_enable_reg_info->access_bit_mask); |
1da177e4 LT |
328 | PM1Bcontrol = PM1Acontrol; |
329 | ||
330 | /* Insert SLP_TYP bits */ | |
331 | ||
4be44fcd LB |
332 | PM1Acontrol |= |
333 | (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); | |
334 | PM1Bcontrol |= | |
335 | (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position); | |
1da177e4 LT |
336 | |
337 | /* | |
338 | * We split the writes of SLP_TYP and SLP_EN to workaround | |
339 | * poorly implemented hardware. | |
340 | */ | |
341 | ||
342 | /* Write #1: fill in SLP_TYP data */ | |
343 | ||
4be44fcd LB |
344 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
345 | ACPI_REGISTER_PM1A_CONTROL, | |
346 | PM1Acontrol); | |
347 | if (ACPI_FAILURE(status)) { | |
348 | return_ACPI_STATUS(status); | |
1da177e4 LT |
349 | } |
350 | ||
4be44fcd LB |
351 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
352 | ACPI_REGISTER_PM1B_CONTROL, | |
353 | PM1Bcontrol); | |
354 | if (ACPI_FAILURE(status)) { | |
355 | return_ACPI_STATUS(status); | |
1da177e4 LT |
356 | } |
357 | ||
358 | /* Insert SLP_ENABLE bit */ | |
359 | ||
360 | PM1Acontrol |= sleep_enable_reg_info->access_bit_mask; | |
361 | PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask; | |
362 | ||
363 | /* Write #2: SLP_TYP + SLP_EN */ | |
364 | ||
4be44fcd | 365 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 366 | |
4be44fcd LB |
367 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
368 | ACPI_REGISTER_PM1A_CONTROL, | |
369 | PM1Acontrol); | |
370 | if (ACPI_FAILURE(status)) { | |
371 | return_ACPI_STATUS(status); | |
1da177e4 LT |
372 | } |
373 | ||
4be44fcd LB |
374 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
375 | ACPI_REGISTER_PM1B_CONTROL, | |
376 | PM1Bcontrol); | |
377 | if (ACPI_FAILURE(status)) { | |
378 | return_ACPI_STATUS(status); | |
1da177e4 LT |
379 | } |
380 | ||
381 | if (sleep_state > ACPI_STATE_S3) { | |
382 | /* | |
44f6c012 RM |
383 | * We wanted to sleep > S3, but it didn't happen (by virtue of the |
384 | * fact that we are still executing!) | |
1da177e4 | 385 | * |
44f6c012 RM |
386 | * Wait ten seconds, then try again. This is to get S4/S5 to work on |
387 | * all machines. | |
1da177e4 LT |
388 | * |
389 | * We wait so long to allow chipsets that poll this reg very slowly to | |
390 | * still read the right value. Ideally, this block would go | |
391 | * away entirely. | |
392 | */ | |
4be44fcd LB |
393 | acpi_os_stall(10000000); |
394 | ||
395 | status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, | |
396 | ACPI_REGISTER_PM1_CONTROL, | |
397 | sleep_enable_reg_info-> | |
398 | access_bit_mask); | |
399 | if (ACPI_FAILURE(status)) { | |
400 | return_ACPI_STATUS(status); | |
1da177e4 LT |
401 | } |
402 | } | |
403 | ||
404 | /* Wait until we enter sleep state */ | |
405 | ||
406 | do { | |
d8c71b6d | 407 | status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value); |
4be44fcd LB |
408 | if (ACPI_FAILURE(status)) { |
409 | return_ACPI_STATUS(status); | |
1da177e4 LT |
410 | } |
411 | ||
412 | /* Spin until we wake */ | |
413 | ||
414 | } while (!in_value); | |
415 | ||
4be44fcd | 416 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 417 | } |
1da177e4 | 418 | |
8313524a | 419 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state) |
1da177e4 | 420 | |
44f6c012 | 421 | /******************************************************************************* |
1da177e4 LT |
422 | * |
423 | * FUNCTION: acpi_enter_sleep_state_s4bios | |
424 | * | |
425 | * PARAMETERS: None | |
426 | * | |
427 | * RETURN: Status | |
428 | * | |
429 | * DESCRIPTION: Perform a S4 bios request. | |
430 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
431 | * | |
432 | ******************************************************************************/ | |
4be44fcd | 433 | acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void) |
1da177e4 | 434 | { |
4be44fcd LB |
435 | u32 in_value; |
436 | acpi_status status; | |
1da177e4 | 437 | |
b229cf92 | 438 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios); |
1da177e4 | 439 | |
d8c71b6d | 440 | status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); |
4be44fcd LB |
441 | if (ACPI_FAILURE(status)) { |
442 | return_ACPI_STATUS(status); | |
1da177e4 LT |
443 | } |
444 | ||
d8c71b6d | 445 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
446 | if (ACPI_FAILURE(status)) { |
447 | return_ACPI_STATUS(status); | |
1da177e4 LT |
448 | } |
449 | ||
450 | /* | |
451 | * 1) Disable/Clear all GPEs | |
452 | * 2) Enable all wakeup GPEs | |
453 | */ | |
4be44fcd LB |
454 | status = acpi_hw_disable_all_gpes(); |
455 | if (ACPI_FAILURE(status)) { | |
456 | return_ACPI_STATUS(status); | |
1da177e4 LT |
457 | } |
458 | acpi_gbl_system_awake_and_running = FALSE; | |
459 | ||
4be44fcd LB |
460 | status = acpi_hw_enable_all_wakeup_gpes(); |
461 | if (ACPI_FAILURE(status)) { | |
462 | return_ACPI_STATUS(status); | |
1da177e4 LT |
463 | } |
464 | ||
4be44fcd | 465 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 466 | |
f3d2e786 BM |
467 | status = acpi_os_write_port(acpi_gbl_FADT.smi_command, |
468 | (u32) acpi_gbl_FADT.S4bios_request, 8); | |
1da177e4 LT |
469 | |
470 | do { | |
471 | acpi_os_stall(1000); | |
d8c71b6d | 472 | status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value); |
4be44fcd LB |
473 | if (ACPI_FAILURE(status)) { |
474 | return_ACPI_STATUS(status); | |
1da177e4 LT |
475 | } |
476 | } while (!in_value); | |
477 | ||
4be44fcd | 478 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 479 | } |
1da177e4 | 480 | |
8313524a | 481 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios) |
1da177e4 | 482 | |
44f6c012 | 483 | /******************************************************************************* |
1da177e4 LT |
484 | * |
485 | * FUNCTION: acpi_leave_sleep_state | |
486 | * | |
487 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
488 | * | |
489 | * RETURN: Status | |
490 | * | |
491 | * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep | |
492 | * Called with interrupts ENABLED. | |
493 | * | |
494 | ******************************************************************************/ | |
4be44fcd | 495 | acpi_status acpi_leave_sleep_state(u8 sleep_state) |
1da177e4 | 496 | { |
4be44fcd LB |
497 | struct acpi_object_list arg_list; |
498 | union acpi_object arg; | |
499 | acpi_status status; | |
500 | struct acpi_bit_register_info *sleep_type_reg_info; | |
501 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
502 | u32 PM1Acontrol; | |
503 | u32 PM1Bcontrol; | |
1da177e4 | 504 | |
b229cf92 | 505 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state); |
1da177e4 LT |
506 | |
507 | /* | |
508 | * Set SLP_TYPE and SLP_EN to state S0. | |
509 | * This is unclear from the ACPI Spec, but it is required | |
510 | * by some machines. | |
511 | */ | |
4be44fcd LB |
512 | status = acpi_get_sleep_type_data(ACPI_STATE_S0, |
513 | &acpi_gbl_sleep_type_a, | |
514 | &acpi_gbl_sleep_type_b); | |
515 | if (ACPI_SUCCESS(status)) { | |
516 | sleep_type_reg_info = | |
517 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A); | |
518 | sleep_enable_reg_info = | |
519 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
520 | |
521 | /* Get current value of PM1A control */ | |
522 | ||
4be44fcd LB |
523 | status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, |
524 | ACPI_REGISTER_PM1_CONTROL, | |
525 | &PM1Acontrol); | |
526 | if (ACPI_SUCCESS(status)) { | |
52fc0b02 | 527 | |
1da177e4 LT |
528 | /* Clear SLP_EN and SLP_TYP fields */ |
529 | ||
530 | PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | | |
4be44fcd LB |
531 | sleep_enable_reg_info-> |
532 | access_bit_mask); | |
1da177e4 LT |
533 | PM1Bcontrol = PM1Acontrol; |
534 | ||
535 | /* Insert SLP_TYP bits */ | |
536 | ||
4be44fcd LB |
537 | PM1Acontrol |= |
538 | (acpi_gbl_sleep_type_a << sleep_type_reg_info-> | |
539 | bit_position); | |
540 | PM1Bcontrol |= | |
541 | (acpi_gbl_sleep_type_b << sleep_type_reg_info-> | |
542 | bit_position); | |
1da177e4 LT |
543 | |
544 | /* Just ignore any errors */ | |
545 | ||
4be44fcd LB |
546 | (void)acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, |
547 | ACPI_REGISTER_PM1A_CONTROL, | |
548 | PM1Acontrol); | |
549 | (void)acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, | |
550 | ACPI_REGISTER_PM1B_CONTROL, | |
551 | PM1Bcontrol); | |
1da177e4 LT |
552 | } |
553 | } | |
554 | ||
555 | /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ | |
556 | ||
557 | acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; | |
558 | ||
559 | /* Setup parameter object */ | |
560 | ||
561 | arg_list.count = 1; | |
562 | arg_list.pointer = &arg; | |
563 | arg.type = ACPI_TYPE_INTEGER; | |
564 | ||
565 | /* Ignore any errors from these methods */ | |
566 | ||
567 | arg.integer.value = ACPI_SST_WAKING; | |
4be44fcd LB |
568 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
569 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 570 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
571 | } |
572 | ||
573 | arg.integer.value = sleep_state; | |
4be44fcd LB |
574 | status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL); |
575 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 576 | ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS")); |
1da177e4 LT |
577 | } |
578 | ||
1da177e4 | 579 | /* |
79d2dfaa TR |
580 | * GPEs must be enabled before _WAK is called as GPEs |
581 | * might get fired there | |
582 | * | |
1da177e4 LT |
583 | * Restore the GPEs: |
584 | * 1) Disable/Clear all GPEs | |
585 | * 2) Enable all runtime GPEs | |
586 | */ | |
4be44fcd LB |
587 | status = acpi_hw_disable_all_gpes(); |
588 | if (ACPI_FAILURE(status)) { | |
589 | return_ACPI_STATUS(status); | |
1da177e4 | 590 | } |
4be44fcd LB |
591 | status = acpi_hw_enable_all_runtime_gpes(); |
592 | if (ACPI_FAILURE(status)) { | |
593 | return_ACPI_STATUS(status); | |
1da177e4 LT |
594 | } |
595 | ||
79d2dfaa TR |
596 | status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL); |
597 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
598 | ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK")); | |
599 | } | |
600 | /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ | |
601 | ||
602 | acpi_gbl_system_awake_and_running = TRUE; | |
603 | ||
1da177e4 LT |
604 | /* Enable power button */ |
605 | ||
4be44fcd LB |
606 | (void) |
607 | acpi_set_register(acpi_gbl_fixed_event_info | |
d8c71b6d | 608 | [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1); |
44f6c012 | 609 | |
4be44fcd LB |
610 | (void) |
611 | acpi_set_register(acpi_gbl_fixed_event_info | |
d8c71b6d | 612 | [ACPI_EVENT_POWER_BUTTON].status_register_id, 1); |
1da177e4 LT |
613 | |
614 | arg.integer.value = ACPI_SST_WORKING; | |
4be44fcd LB |
615 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
616 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 617 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
618 | } |
619 | ||
4be44fcd | 620 | return_ACPI_STATUS(status); |
1da177e4 | 621 | } |
8313524a BM |
622 | |
623 | ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state) |