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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 | ||
c95d47a8 | 195 | /* Run the _PTS method */ |
1da177e4 | 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 | ||
1da177e4 LT |
202 | /* Setup the argument to _SST */ |
203 | ||
204 | switch (sleep_state) { | |
205 | case ACPI_STATE_S0: | |
206 | arg.integer.value = ACPI_SST_WORKING; | |
207 | break; | |
208 | ||
209 | case ACPI_STATE_S1: | |
210 | case ACPI_STATE_S2: | |
211 | case ACPI_STATE_S3: | |
212 | arg.integer.value = ACPI_SST_SLEEPING; | |
213 | break; | |
214 | ||
215 | case ACPI_STATE_S4: | |
216 | arg.integer.value = ACPI_SST_SLEEP_CONTEXT; | |
217 | break; | |
218 | ||
219 | default: | |
4be44fcd | 220 | arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */ |
1da177e4 LT |
221 | break; |
222 | } | |
223 | ||
224 | /* Set the system indicators to show the desired sleep state. */ | |
225 | ||
4be44fcd LB |
226 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
227 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 BM |
228 | ACPI_EXCEPTION((AE_INFO, status, |
229 | "While executing method _SST")); | |
1da177e4 LT |
230 | } |
231 | ||
6cffd466 | 232 | return_ACPI_STATUS(status); |
1da177e4 LT |
233 | } |
234 | ||
8313524a BM |
235 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep) |
236 | ||
44f6c012 | 237 | /******************************************************************************* |
1da177e4 LT |
238 | * |
239 | * FUNCTION: acpi_enter_sleep_state | |
240 | * | |
241 | * PARAMETERS: sleep_state - Which sleep state to enter | |
242 | * | |
243 | * RETURN: Status | |
244 | * | |
245 | * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231) | |
246 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
247 | * | |
248 | ******************************************************************************/ | |
4be44fcd | 249 | acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state) |
1da177e4 | 250 | { |
4be44fcd LB |
251 | u32 PM1Acontrol; |
252 | u32 PM1Bcontrol; | |
253 | struct acpi_bit_register_info *sleep_type_reg_info; | |
254 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
255 | u32 in_value; | |
c95d47a8 RW |
256 | struct acpi_object_list arg_list; |
257 | union acpi_object arg; | |
4be44fcd | 258 | acpi_status status; |
1da177e4 | 259 | |
b229cf92 | 260 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state); |
1da177e4 LT |
261 | |
262 | if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) || | |
4be44fcd | 263 | (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) { |
b8e4d893 BM |
264 | ACPI_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X", |
265 | acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b)); | |
4be44fcd | 266 | return_ACPI_STATUS(AE_AML_OPERAND_VALUE); |
1da177e4 LT |
267 | } |
268 | ||
4be44fcd LB |
269 | sleep_type_reg_info = |
270 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A); | |
271 | sleep_enable_reg_info = | |
272 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
273 | |
274 | /* Clear wake status */ | |
275 | ||
d8c71b6d | 276 | status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); |
4be44fcd LB |
277 | if (ACPI_FAILURE(status)) { |
278 | return_ACPI_STATUS(status); | |
1da177e4 LT |
279 | } |
280 | ||
281 | /* Clear all fixed and general purpose status bits */ | |
282 | ||
d8c71b6d | 283 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
284 | if (ACPI_FAILURE(status)) { |
285 | return_ACPI_STATUS(status); | |
1da177e4 LT |
286 | } |
287 | ||
288 | /* | |
23b168d4 | 289 | * 1) Disable/Clear all GPEs |
1da177e4 LT |
290 | * 2) Enable all wakeup GPEs |
291 | */ | |
1d99967b AS |
292 | status = acpi_hw_disable_all_gpes(); |
293 | if (ACPI_FAILURE(status)) { | |
294 | return_ACPI_STATUS(status); | |
295 | } | |
1da177e4 LT |
296 | acpi_gbl_system_awake_and_running = FALSE; |
297 | ||
4be44fcd LB |
298 | status = acpi_hw_enable_all_wakeup_gpes(); |
299 | if (ACPI_FAILURE(status)) { | |
300 | return_ACPI_STATUS(status); | |
1da177e4 LT |
301 | } |
302 | ||
c95d47a8 RW |
303 | /* Execute the _GTS method */ |
304 | ||
305 | arg_list.count = 1; | |
306 | arg_list.pointer = &arg; | |
307 | arg.type = ACPI_TYPE_INTEGER; | |
308 | arg.integer.value = sleep_state; | |
309 | ||
310 | status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL); | |
311 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
312 | return_ACPI_STATUS(status); | |
313 | } | |
314 | ||
1da177e4 LT |
315 | /* Get current value of PM1A control */ |
316 | ||
d30dc9ab | 317 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol); |
4be44fcd LB |
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 | ||
d30dc9ab | 344 | status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
4be44fcd LB |
345 | PM1Acontrol); |
346 | if (ACPI_FAILURE(status)) { | |
347 | return_ACPI_STATUS(status); | |
1da177e4 LT |
348 | } |
349 | ||
d30dc9ab | 350 | status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
4be44fcd LB |
351 | PM1Bcontrol); |
352 | if (ACPI_FAILURE(status)) { | |
353 | return_ACPI_STATUS(status); | |
1da177e4 LT |
354 | } |
355 | ||
356 | /* Insert SLP_ENABLE bit */ | |
357 | ||
358 | PM1Acontrol |= sleep_enable_reg_info->access_bit_mask; | |
359 | PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask; | |
360 | ||
361 | /* Write #2: SLP_TYP + SLP_EN */ | |
362 | ||
4be44fcd | 363 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 364 | |
d30dc9ab | 365 | status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
4be44fcd LB |
366 | PM1Acontrol); |
367 | if (ACPI_FAILURE(status)) { | |
368 | return_ACPI_STATUS(status); | |
1da177e4 LT |
369 | } |
370 | ||
d30dc9ab | 371 | status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
4be44fcd LB |
372 | PM1Bcontrol); |
373 | if (ACPI_FAILURE(status)) { | |
374 | return_ACPI_STATUS(status); | |
1da177e4 LT |
375 | } |
376 | ||
377 | if (sleep_state > ACPI_STATE_S3) { | |
378 | /* | |
44f6c012 RM |
379 | * We wanted to sleep > S3, but it didn't happen (by virtue of the |
380 | * fact that we are still executing!) | |
1da177e4 | 381 | * |
44f6c012 RM |
382 | * Wait ten seconds, then try again. This is to get S4/S5 to work on |
383 | * all machines. | |
1da177e4 LT |
384 | * |
385 | * We wait so long to allow chipsets that poll this reg very slowly to | |
386 | * still read the right value. Ideally, this block would go | |
387 | * away entirely. | |
388 | */ | |
4be44fcd LB |
389 | acpi_os_stall(10000000); |
390 | ||
d30dc9ab | 391 | status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL, |
4be44fcd LB |
392 | sleep_enable_reg_info-> |
393 | access_bit_mask); | |
394 | if (ACPI_FAILURE(status)) { | |
395 | return_ACPI_STATUS(status); | |
1da177e4 LT |
396 | } |
397 | } | |
398 | ||
399 | /* Wait until we enter sleep state */ | |
400 | ||
401 | do { | |
2d571b33 AS |
402 | status = acpi_get_register_unlocked(ACPI_BITREG_WAKE_STATUS, |
403 | &in_value); | |
4be44fcd LB |
404 | if (ACPI_FAILURE(status)) { |
405 | return_ACPI_STATUS(status); | |
1da177e4 LT |
406 | } |
407 | ||
408 | /* Spin until we wake */ | |
409 | ||
410 | } while (!in_value); | |
411 | ||
4be44fcd | 412 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 413 | } |
1da177e4 | 414 | |
8313524a | 415 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state) |
1da177e4 | 416 | |
44f6c012 | 417 | /******************************************************************************* |
1da177e4 LT |
418 | * |
419 | * FUNCTION: acpi_enter_sleep_state_s4bios | |
420 | * | |
421 | * PARAMETERS: None | |
422 | * | |
423 | * RETURN: Status | |
424 | * | |
425 | * DESCRIPTION: Perform a S4 bios request. | |
426 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
427 | * | |
428 | ******************************************************************************/ | |
4be44fcd | 429 | acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void) |
1da177e4 | 430 | { |
4be44fcd LB |
431 | u32 in_value; |
432 | acpi_status status; | |
1da177e4 | 433 | |
b229cf92 | 434 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios); |
1da177e4 | 435 | |
d8c71b6d | 436 | status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1); |
4be44fcd LB |
437 | if (ACPI_FAILURE(status)) { |
438 | return_ACPI_STATUS(status); | |
1da177e4 LT |
439 | } |
440 | ||
d8c71b6d | 441 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
442 | if (ACPI_FAILURE(status)) { |
443 | return_ACPI_STATUS(status); | |
1da177e4 LT |
444 | } |
445 | ||
446 | /* | |
447 | * 1) Disable/Clear all GPEs | |
448 | * 2) Enable all wakeup GPEs | |
449 | */ | |
4be44fcd LB |
450 | status = acpi_hw_disable_all_gpes(); |
451 | if (ACPI_FAILURE(status)) { | |
452 | return_ACPI_STATUS(status); | |
1da177e4 LT |
453 | } |
454 | acpi_gbl_system_awake_and_running = FALSE; | |
455 | ||
4be44fcd LB |
456 | status = acpi_hw_enable_all_wakeup_gpes(); |
457 | if (ACPI_FAILURE(status)) { | |
458 | return_ACPI_STATUS(status); | |
1da177e4 LT |
459 | } |
460 | ||
4be44fcd | 461 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 462 | |
f3d2e786 BM |
463 | status = acpi_os_write_port(acpi_gbl_FADT.smi_command, |
464 | (u32) acpi_gbl_FADT.S4bios_request, 8); | |
1da177e4 LT |
465 | |
466 | do { | |
467 | acpi_os_stall(1000); | |
d8c71b6d | 468 | status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value); |
4be44fcd LB |
469 | if (ACPI_FAILURE(status)) { |
470 | return_ACPI_STATUS(status); | |
1da177e4 LT |
471 | } |
472 | } while (!in_value); | |
473 | ||
4be44fcd | 474 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 475 | } |
1da177e4 | 476 | |
8313524a | 477 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios) |
1da177e4 | 478 | |
44f6c012 | 479 | /******************************************************************************* |
1da177e4 | 480 | * |
c95d47a8 | 481 | * FUNCTION: acpi_leave_sleep_state_prep |
1da177e4 | 482 | * |
c95d47a8 | 483 | * PARAMETERS: sleep_state - Which sleep state we are exiting |
1da177e4 LT |
484 | * |
485 | * RETURN: Status | |
486 | * | |
c95d47a8 RW |
487 | * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a |
488 | * sleep. | |
489 | * Called with interrupts DISABLED. | |
1da177e4 LT |
490 | * |
491 | ******************************************************************************/ | |
c95d47a8 | 492 | acpi_status acpi_leave_sleep_state_prep(u8 sleep_state) |
1da177e4 | 493 | { |
4be44fcd LB |
494 | struct acpi_object_list arg_list; |
495 | union acpi_object arg; | |
496 | acpi_status status; | |
497 | struct acpi_bit_register_info *sleep_type_reg_info; | |
498 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
499 | u32 PM1Acontrol; | |
500 | u32 PM1Bcontrol; | |
1da177e4 | 501 | |
c95d47a8 | 502 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep); |
1da177e4 LT |
503 | |
504 | /* | |
505 | * Set SLP_TYPE and SLP_EN to state S0. | |
506 | * This is unclear from the ACPI Spec, but it is required | |
507 | * by some machines. | |
508 | */ | |
4be44fcd LB |
509 | status = acpi_get_sleep_type_data(ACPI_STATE_S0, |
510 | &acpi_gbl_sleep_type_a, | |
511 | &acpi_gbl_sleep_type_b); | |
512 | if (ACPI_SUCCESS(status)) { | |
513 | sleep_type_reg_info = | |
514 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A); | |
515 | sleep_enable_reg_info = | |
516 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
517 | |
518 | /* Get current value of PM1A control */ | |
519 | ||
d30dc9ab | 520 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, |
4be44fcd LB |
521 | &PM1Acontrol); |
522 | if (ACPI_SUCCESS(status)) { | |
52fc0b02 | 523 | |
1da177e4 LT |
524 | /* Clear SLP_EN and SLP_TYP fields */ |
525 | ||
526 | PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask | | |
4be44fcd LB |
527 | sleep_enable_reg_info-> |
528 | access_bit_mask); | |
1da177e4 LT |
529 | PM1Bcontrol = PM1Acontrol; |
530 | ||
531 | /* Insert SLP_TYP bits */ | |
532 | ||
4be44fcd LB |
533 | PM1Acontrol |= |
534 | (acpi_gbl_sleep_type_a << sleep_type_reg_info-> | |
535 | bit_position); | |
536 | PM1Bcontrol |= | |
537 | (acpi_gbl_sleep_type_b << sleep_type_reg_info-> | |
538 | bit_position); | |
1da177e4 LT |
539 | |
540 | /* Just ignore any errors */ | |
541 | ||
d30dc9ab | 542 | (void)acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, |
4be44fcd | 543 | PM1Acontrol); |
d30dc9ab | 544 | (void)acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, |
4be44fcd | 545 | PM1Bcontrol); |
1da177e4 LT |
546 | } |
547 | } | |
548 | ||
c95d47a8 RW |
549 | /* Execute the _BFS method */ |
550 | ||
551 | arg_list.count = 1; | |
552 | arg_list.pointer = &arg; | |
553 | arg.type = ACPI_TYPE_INTEGER; | |
554 | arg.integer.value = sleep_state; | |
555 | ||
556 | status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL); | |
557 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
558 | ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS")); | |
559 | } | |
560 | ||
561 | return_ACPI_STATUS(status); | |
562 | } | |
563 | ||
564 | /******************************************************************************* | |
565 | * | |
566 | * FUNCTION: acpi_leave_sleep_state | |
567 | * | |
568 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
569 | * | |
570 | * RETURN: Status | |
571 | * | |
572 | * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep | |
573 | * Called with interrupts ENABLED. | |
574 | * | |
575 | ******************************************************************************/ | |
576 | acpi_status acpi_leave_sleep_state(u8 sleep_state) | |
577 | { | |
578 | struct acpi_object_list arg_list; | |
579 | union acpi_object arg; | |
580 | acpi_status status; | |
581 | ||
582 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state); | |
583 | ||
1da177e4 LT |
584 | /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ |
585 | ||
586 | acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; | |
587 | ||
588 | /* Setup parameter object */ | |
589 | ||
590 | arg_list.count = 1; | |
591 | arg_list.pointer = &arg; | |
592 | arg.type = ACPI_TYPE_INTEGER; | |
593 | ||
594 | /* Ignore any errors from these methods */ | |
595 | ||
596 | arg.integer.value = ACPI_SST_WAKING; | |
4be44fcd LB |
597 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
598 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 599 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
600 | } |
601 | ||
1da177e4 | 602 | /* |
79d2dfaa TR |
603 | * GPEs must be enabled before _WAK is called as GPEs |
604 | * might get fired there | |
605 | * | |
1da177e4 LT |
606 | * Restore the GPEs: |
607 | * 1) Disable/Clear all GPEs | |
608 | * 2) Enable all runtime GPEs | |
609 | */ | |
4be44fcd LB |
610 | status = acpi_hw_disable_all_gpes(); |
611 | if (ACPI_FAILURE(status)) { | |
612 | return_ACPI_STATUS(status); | |
1da177e4 | 613 | } |
4be44fcd LB |
614 | status = acpi_hw_enable_all_runtime_gpes(); |
615 | if (ACPI_FAILURE(status)) { | |
616 | return_ACPI_STATUS(status); | |
1da177e4 LT |
617 | } |
618 | ||
79d2dfaa TR |
619 | status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL); |
620 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
621 | ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK")); | |
622 | } | |
623 | /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ | |
624 | ||
625 | acpi_gbl_system_awake_and_running = TRUE; | |
626 | ||
1da177e4 LT |
627 | /* Enable power button */ |
628 | ||
4be44fcd LB |
629 | (void) |
630 | acpi_set_register(acpi_gbl_fixed_event_info | |
d8c71b6d | 631 | [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1); |
44f6c012 | 632 | |
4be44fcd LB |
633 | (void) |
634 | acpi_set_register(acpi_gbl_fixed_event_info | |
d8c71b6d | 635 | [ACPI_EVENT_POWER_BUTTON].status_register_id, 1); |
1da177e4 LT |
636 | |
637 | arg.integer.value = ACPI_SST_WORKING; | |
4be44fcd LB |
638 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
639 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 640 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
641 | } |
642 | ||
4be44fcd | 643 | return_ACPI_STATUS(status); |
1da177e4 | 644 | } |
8313524a BM |
645 | |
646 | ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state) |