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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 | * | |
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 | ||
1d18c058 BM |
73 | status = acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS, |
74 | ACPI_CAST_INDIRECT_PTR(struct | |
75 | acpi_table_header, | |
76 | &facs)); | |
f3d2e786 BM |
77 | if (ACPI_FAILURE(status)) { |
78 | return_ACPI_STATUS(status); | |
79 | } | |
80 | ||
1da177e4 LT |
81 | /* Set the vector */ |
82 | ||
f3d2e786 BM |
83 | if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) { |
84 | /* | |
85 | * ACPI 1.0 FACS or short table or optional X_ field is zero | |
86 | */ | |
87 | facs->firmware_waking_vector = (u32) physical_address; | |
4be44fcd | 88 | } else { |
f3d2e786 BM |
89 | /* |
90 | * ACPI 2.0 FACS with valid X_ field | |
91 | */ | |
92 | facs->xfirmware_waking_vector = physical_address; | |
1da177e4 LT |
93 | } |
94 | ||
4be44fcd | 95 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
96 | } |
97 | ||
8313524a BM |
98 | ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector) |
99 | ||
44f6c012 | 100 | /******************************************************************************* |
1da177e4 LT |
101 | * |
102 | * FUNCTION: acpi_get_firmware_waking_vector | |
103 | * | |
44f6c012 | 104 | * PARAMETERS: *physical_address - Where the contents of |
1da177e4 | 105 | * the firmware_waking_vector field of |
44f6c012 | 106 | * the FACS will be returned. |
1da177e4 | 107 | * |
44f6c012 | 108 | * RETURN: Status, vector |
1da177e4 | 109 | * |
44f6c012 | 110 | * DESCRIPTION: Access function for the firmware_waking_vector field in FACS |
1da177e4 LT |
111 | * |
112 | ******************************************************************************/ | |
113 | #ifdef ACPI_FUTURE_USAGE | |
114 | acpi_status | |
4be44fcd | 115 | acpi_get_firmware_waking_vector(acpi_physical_address * physical_address) |
1da177e4 | 116 | { |
f3d2e786 BM |
117 | struct acpi_table_facs *facs; |
118 | acpi_status status; | |
1da177e4 | 119 | |
b229cf92 | 120 | ACPI_FUNCTION_TRACE(acpi_get_firmware_waking_vector); |
1da177e4 LT |
121 | |
122 | if (!physical_address) { | |
4be44fcd | 123 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
124 | } |
125 | ||
f3d2e786 BM |
126 | /* Get the FACS */ |
127 | ||
1d18c058 BM |
128 | status = acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS, |
129 | ACPI_CAST_INDIRECT_PTR(struct | |
130 | acpi_table_header, | |
131 | &facs)); | |
f3d2e786 BM |
132 | if (ACPI_FAILURE(status)) { |
133 | return_ACPI_STATUS(status); | |
134 | } | |
135 | ||
1da177e4 LT |
136 | /* Get the vector */ |
137 | ||
f3d2e786 BM |
138 | if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) { |
139 | /* | |
140 | * ACPI 1.0 FACS or short table or optional X_ field is zero | |
141 | */ | |
142 | *physical_address = | |
143 | (acpi_physical_address) facs->firmware_waking_vector; | |
4be44fcd | 144 | } else { |
f3d2e786 BM |
145 | /* |
146 | * ACPI 2.0 FACS with valid X_ field | |
147 | */ | |
1da177e4 | 148 | *physical_address = |
f3d2e786 | 149 | (acpi_physical_address) facs->xfirmware_waking_vector; |
1da177e4 LT |
150 | } |
151 | ||
4be44fcd | 152 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 153 | } |
8313524a BM |
154 | |
155 | ACPI_EXPORT_SYMBOL(acpi_get_firmware_waking_vector) | |
1da177e4 | 156 | #endif |
44f6c012 | 157 | /******************************************************************************* |
1da177e4 LT |
158 | * |
159 | * FUNCTION: acpi_enter_sleep_state_prep | |
160 | * | |
161 | * PARAMETERS: sleep_state - Which sleep state to enter | |
162 | * | |
163 | * RETURN: Status | |
164 | * | |
165 | * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231) | |
166 | * This function must execute with interrupts enabled. | |
167 | * We break sleeping into 2 stages so that OSPM can handle | |
168 | * various OS-specific tasks between the two steps. | |
169 | * | |
170 | ******************************************************************************/ | |
4be44fcd | 171 | acpi_status acpi_enter_sleep_state_prep(u8 sleep_state) |
1da177e4 | 172 | { |
4be44fcd LB |
173 | acpi_status status; |
174 | struct acpi_object_list arg_list; | |
175 | union acpi_object arg; | |
1da177e4 | 176 | |
b229cf92 | 177 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep); |
1da177e4 LT |
178 | |
179 | /* | |
180 | * _PSW methods could be run here to enable wake-on keyboard, LAN, etc. | |
181 | */ | |
4be44fcd LB |
182 | status = acpi_get_sleep_type_data(sleep_state, |
183 | &acpi_gbl_sleep_type_a, | |
184 | &acpi_gbl_sleep_type_b); | |
185 | if (ACPI_FAILURE(status)) { | |
186 | return_ACPI_STATUS(status); | |
1da177e4 LT |
187 | } |
188 | ||
189 | /* Setup parameter object */ | |
190 | ||
191 | arg_list.count = 1; | |
192 | arg_list.pointer = &arg; | |
193 | ||
194 | arg.type = ACPI_TYPE_INTEGER; | |
195 | arg.integer.value = sleep_state; | |
196 | ||
c95d47a8 | 197 | /* Run the _PTS method */ |
1da177e4 | 198 | |
4be44fcd LB |
199 | status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL); |
200 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
201 | return_ACPI_STATUS(status); | |
1da177e4 LT |
202 | } |
203 | ||
1da177e4 LT |
204 | /* Setup the argument to _SST */ |
205 | ||
206 | switch (sleep_state) { | |
207 | case ACPI_STATE_S0: | |
208 | arg.integer.value = ACPI_SST_WORKING; | |
209 | break; | |
210 | ||
211 | case ACPI_STATE_S1: | |
212 | case ACPI_STATE_S2: | |
213 | case ACPI_STATE_S3: | |
214 | arg.integer.value = ACPI_SST_SLEEPING; | |
215 | break; | |
216 | ||
217 | case ACPI_STATE_S4: | |
218 | arg.integer.value = ACPI_SST_SLEEP_CONTEXT; | |
219 | break; | |
220 | ||
221 | default: | |
4be44fcd | 222 | arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */ |
1da177e4 LT |
223 | break; |
224 | } | |
225 | ||
d52c79ac BM |
226 | /* |
227 | * Set the system indicators to show the desired sleep state. | |
228 | * _SST is an optional method (return no error if not found) | |
229 | */ | |
4be44fcd LB |
230 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
231 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 BM |
232 | ACPI_EXCEPTION((AE_INFO, status, |
233 | "While executing method _SST")); | |
1da177e4 LT |
234 | } |
235 | ||
d52c79ac | 236 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
237 | } |
238 | ||
8313524a BM |
239 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep) |
240 | ||
44f6c012 | 241 | /******************************************************************************* |
1da177e4 LT |
242 | * |
243 | * FUNCTION: acpi_enter_sleep_state | |
244 | * | |
245 | * PARAMETERS: sleep_state - Which sleep state to enter | |
246 | * | |
247 | * RETURN: Status | |
248 | * | |
249 | * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231) | |
250 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
251 | * | |
252 | ******************************************************************************/ | |
4be44fcd | 253 | acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state) |
1da177e4 | 254 | { |
4be44fcd LB |
255 | u32 PM1Acontrol; |
256 | u32 PM1Bcontrol; | |
257 | struct acpi_bit_register_info *sleep_type_reg_info; | |
258 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
259 | u32 in_value; | |
c95d47a8 RW |
260 | struct acpi_object_list arg_list; |
261 | union acpi_object arg; | |
4be44fcd | 262 | acpi_status status; |
1da177e4 | 263 | |
b229cf92 | 264 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state); |
1da177e4 LT |
265 | |
266 | if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) || | |
4be44fcd | 267 | (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) { |
b8e4d893 BM |
268 | ACPI_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X", |
269 | acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b)); | |
4be44fcd | 270 | return_ACPI_STATUS(AE_AML_OPERAND_VALUE); |
1da177e4 LT |
271 | } |
272 | ||
4be44fcd LB |
273 | sleep_type_reg_info = |
274 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A); | |
275 | sleep_enable_reg_info = | |
276 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
277 | |
278 | /* Clear wake status */ | |
279 | ||
d8c71b6d | 280 | status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); |
4be44fcd LB |
281 | if (ACPI_FAILURE(status)) { |
282 | return_ACPI_STATUS(status); | |
1da177e4 LT |
283 | } |
284 | ||
285 | /* Clear all fixed and general purpose status bits */ | |
286 | ||
d8c71b6d | 287 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
288 | if (ACPI_FAILURE(status)) { |
289 | return_ACPI_STATUS(status); | |
1da177e4 LT |
290 | } |
291 | ||
292 | /* | |
23b168d4 | 293 | * 1) Disable/Clear all GPEs |
1da177e4 LT |
294 | * 2) Enable all wakeup GPEs |
295 | */ | |
1d99967b AS |
296 | status = acpi_hw_disable_all_gpes(); |
297 | if (ACPI_FAILURE(status)) { | |
298 | return_ACPI_STATUS(status); | |
299 | } | |
1da177e4 LT |
300 | acpi_gbl_system_awake_and_running = FALSE; |
301 | ||
4be44fcd LB |
302 | status = acpi_hw_enable_all_wakeup_gpes(); |
303 | if (ACPI_FAILURE(status)) { | |
304 | return_ACPI_STATUS(status); | |
1da177e4 LT |
305 | } |
306 | ||
c95d47a8 RW |
307 | /* Execute the _GTS method */ |
308 | ||
309 | arg_list.count = 1; | |
310 | arg_list.pointer = &arg; | |
311 | arg.type = ACPI_TYPE_INTEGER; | |
312 | arg.integer.value = sleep_state; | |
313 | ||
314 | status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL); | |
315 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
316 | return_ACPI_STATUS(status); | |
317 | } | |
318 | ||
1da177e4 LT |
319 | /* Get current value of PM1A control */ |
320 | ||
d30dc9ab | 321 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol); |
4be44fcd LB |
322 | if (ACPI_FAILURE(status)) { |
323 | return_ACPI_STATUS(status); | |
1da177e4 | 324 | } |
4be44fcd LB |
325 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
326 | "Entering sleep state [S%d]\n", sleep_state)); | |
1da177e4 LT |
327 | |
328 | /* Clear SLP_EN and SLP_TYP fields */ | |
329 | ||
44f6c012 | 330 | PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | |
4be44fcd | 331 | sleep_enable_reg_info->access_bit_mask); |
1da177e4 LT |
332 | PM1Bcontrol = PM1Acontrol; |
333 | ||
334 | /* Insert SLP_TYP bits */ | |
335 | ||
4be44fcd LB |
336 | PM1Acontrol |= |
337 | (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); | |
338 | PM1Bcontrol |= | |
339 | (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position); | |
1da177e4 LT |
340 | |
341 | /* | |
342 | * We split the writes of SLP_TYP and SLP_EN to workaround | |
343 | * poorly implemented hardware. | |
344 | */ | |
345 | ||
346 | /* Write #1: fill in SLP_TYP data */ | |
347 | ||
d30dc9ab | 348 | status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
4be44fcd LB |
349 | PM1Acontrol); |
350 | if (ACPI_FAILURE(status)) { | |
351 | return_ACPI_STATUS(status); | |
1da177e4 LT |
352 | } |
353 | ||
d30dc9ab | 354 | status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
4be44fcd LB |
355 | PM1Bcontrol); |
356 | if (ACPI_FAILURE(status)) { | |
357 | return_ACPI_STATUS(status); | |
1da177e4 LT |
358 | } |
359 | ||
360 | /* Insert SLP_ENABLE bit */ | |
361 | ||
362 | PM1Acontrol |= sleep_enable_reg_info->access_bit_mask; | |
363 | PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask; | |
364 | ||
365 | /* Write #2: SLP_TYP + SLP_EN */ | |
366 | ||
4be44fcd | 367 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 368 | |
d30dc9ab | 369 | status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
4be44fcd LB |
370 | PM1Acontrol); |
371 | if (ACPI_FAILURE(status)) { | |
372 | return_ACPI_STATUS(status); | |
1da177e4 LT |
373 | } |
374 | ||
d30dc9ab | 375 | status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
4be44fcd LB |
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 | ||
d30dc9ab | 395 | status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL, |
4be44fcd LB |
396 | sleep_enable_reg_info-> |
397 | access_bit_mask); | |
398 | if (ACPI_FAILURE(status)) { | |
399 | return_ACPI_STATUS(status); | |
1da177e4 LT |
400 | } |
401 | } | |
402 | ||
403 | /* Wait until we enter sleep state */ | |
404 | ||
405 | do { | |
2d571b33 AS |
406 | status = acpi_get_register_unlocked(ACPI_BITREG_WAKE_STATUS, |
407 | &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 | 484 | * |
c95d47a8 | 485 | * FUNCTION: acpi_leave_sleep_state_prep |
1da177e4 | 486 | * |
c95d47a8 | 487 | * PARAMETERS: sleep_state - Which sleep state we are exiting |
1da177e4 LT |
488 | * |
489 | * RETURN: Status | |
490 | * | |
c95d47a8 RW |
491 | * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a |
492 | * sleep. | |
493 | * Called with interrupts DISABLED. | |
1da177e4 LT |
494 | * |
495 | ******************************************************************************/ | |
c95d47a8 | 496 | acpi_status acpi_leave_sleep_state_prep(u8 sleep_state) |
1da177e4 | 497 | { |
4be44fcd LB |
498 | struct acpi_object_list arg_list; |
499 | union acpi_object arg; | |
500 | acpi_status status; | |
501 | struct acpi_bit_register_info *sleep_type_reg_info; | |
502 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
503 | u32 PM1Acontrol; | |
504 | u32 PM1Bcontrol; | |
1da177e4 | 505 | |
c95d47a8 | 506 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep); |
1da177e4 LT |
507 | |
508 | /* | |
509 | * Set SLP_TYPE and SLP_EN to state S0. | |
510 | * This is unclear from the ACPI Spec, but it is required | |
511 | * by some machines. | |
512 | */ | |
4be44fcd LB |
513 | status = acpi_get_sleep_type_data(ACPI_STATE_S0, |
514 | &acpi_gbl_sleep_type_a, | |
515 | &acpi_gbl_sleep_type_b); | |
516 | if (ACPI_SUCCESS(status)) { | |
517 | sleep_type_reg_info = | |
518 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A); | |
519 | sleep_enable_reg_info = | |
520 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
521 | |
522 | /* Get current value of PM1A control */ | |
523 | ||
d30dc9ab | 524 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, |
4be44fcd LB |
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 | ||
d30dc9ab | 546 | (void)acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
4be44fcd | 547 | PM1Acontrol); |
d30dc9ab | 548 | (void)acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
4be44fcd | 549 | PM1Bcontrol); |
1da177e4 LT |
550 | } |
551 | } | |
552 | ||
c95d47a8 RW |
553 | /* Execute the _BFS method */ |
554 | ||
555 | arg_list.count = 1; | |
556 | arg_list.pointer = &arg; | |
557 | arg.type = ACPI_TYPE_INTEGER; | |
558 | arg.integer.value = sleep_state; | |
559 | ||
560 | status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL); | |
561 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
562 | ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS")); | |
563 | } | |
564 | ||
565 | return_ACPI_STATUS(status); | |
566 | } | |
567 | ||
568 | /******************************************************************************* | |
569 | * | |
570 | * FUNCTION: acpi_leave_sleep_state | |
571 | * | |
572 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
573 | * | |
574 | * RETURN: Status | |
575 | * | |
576 | * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep | |
577 | * Called with interrupts ENABLED. | |
578 | * | |
579 | ******************************************************************************/ | |
580 | acpi_status acpi_leave_sleep_state(u8 sleep_state) | |
581 | { | |
582 | struct acpi_object_list arg_list; | |
583 | union acpi_object arg; | |
584 | acpi_status status; | |
585 | ||
586 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state); | |
587 | ||
1da177e4 LT |
588 | /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ |
589 | ||
590 | acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; | |
591 | ||
592 | /* Setup parameter object */ | |
593 | ||
594 | arg_list.count = 1; | |
595 | arg_list.pointer = &arg; | |
596 | arg.type = ACPI_TYPE_INTEGER; | |
597 | ||
598 | /* Ignore any errors from these methods */ | |
599 | ||
600 | arg.integer.value = ACPI_SST_WAKING; | |
4be44fcd LB |
601 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
602 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 603 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
604 | } |
605 | ||
1da177e4 | 606 | /* |
79d2dfaa TR |
607 | * GPEs must be enabled before _WAK is called as GPEs |
608 | * might get fired there | |
609 | * | |
1da177e4 LT |
610 | * Restore the GPEs: |
611 | * 1) Disable/Clear all GPEs | |
612 | * 2) Enable all runtime GPEs | |
613 | */ | |
4be44fcd LB |
614 | status = acpi_hw_disable_all_gpes(); |
615 | if (ACPI_FAILURE(status)) { | |
616 | return_ACPI_STATUS(status); | |
1da177e4 | 617 | } |
4be44fcd LB |
618 | status = acpi_hw_enable_all_runtime_gpes(); |
619 | if (ACPI_FAILURE(status)) { | |
620 | return_ACPI_STATUS(status); | |
1da177e4 LT |
621 | } |
622 | ||
314ccd64 | 623 | arg.integer.value = sleep_state; |
79d2dfaa TR |
624 | status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL); |
625 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
626 | ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK")); | |
627 | } | |
628 | /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ | |
629 | ||
630 | acpi_gbl_system_awake_and_running = TRUE; | |
631 | ||
1da177e4 LT |
632 | /* Enable power button */ |
633 | ||
4be44fcd LB |
634 | (void) |
635 | acpi_set_register(acpi_gbl_fixed_event_info | |
d8c71b6d | 636 | [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1); |
44f6c012 | 637 | |
4be44fcd LB |
638 | (void) |
639 | acpi_set_register(acpi_gbl_fixed_event_info | |
d8c71b6d | 640 | [ACPI_EVENT_POWER_BUTTON].status_register_id, 1); |
1da177e4 LT |
641 | |
642 | arg.integer.value = ACPI_SST_WORKING; | |
4be44fcd LB |
643 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
644 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 645 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
646 | } |
647 | ||
4be44fcd | 648 | return_ACPI_STATUS(status); |
1da177e4 | 649 | } |
8313524a BM |
650 | |
651 | ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state) |