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1da177e4 LT |
1 | |
2 | /****************************************************************************** | |
3 | * | |
4 | * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
b4e104ea | 9 | * Copyright (C) 2000 - 2011, Intel Corp. |
1da177e4 LT |
10 | * All rights reserved. |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
1da177e4 | 45 | #include <acpi/acpi.h> |
e2f7a777 LB |
46 | #include "accommon.h" |
47 | #include "actables.h" | |
69575d38 | 48 | #include <linux/tboot.h> |
1da177e4 LT |
49 | |
50 | #define _COMPONENT ACPI_HARDWARE | |
4be44fcd | 51 | ACPI_MODULE_NAME("hwsleep") |
1da177e4 | 52 | |
44f6c012 | 53 | /******************************************************************************* |
1da177e4 LT |
54 | * |
55 | * FUNCTION: acpi_set_firmware_waking_vector | |
56 | * | |
d85988fa | 57 | * PARAMETERS: physical_address - 32-bit physical address of ACPI real mode |
1da177e4 LT |
58 | * entry point. |
59 | * | |
60 | * RETURN: Status | |
61 | * | |
d85988fa | 62 | * DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS |
1da177e4 LT |
63 | * |
64 | ******************************************************************************/ | |
1da177e4 | 65 | acpi_status |
d85988fa | 66 | acpi_set_firmware_waking_vector(u32 physical_address) |
1da177e4 | 67 | { |
b229cf92 | 68 | ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector); |
1da177e4 | 69 | |
f3d2e786 | 70 | |
a6629105 RW |
71 | /* |
72 | * According to the ACPI specification 2.0c and later, the 64-bit | |
73 | * waking vector should be cleared and the 32-bit waking vector should | |
74 | * be used, unless we want the wake-up code to be called by the BIOS in | |
75 | * Protected Mode. Some systems (for example HP dv5-1004nr) are known | |
76 | * to fail to resume if the 64-bit vector is used. | |
77 | */ | |
a6629105 | 78 | |
d85988fa BM |
79 | /* Set the 32-bit vector */ |
80 | ||
009c4cbe | 81 | acpi_gbl_FACS->firmware_waking_vector = physical_address; |
d85988fa BM |
82 | |
83 | /* Clear the 64-bit vector if it exists */ | |
84 | ||
009c4cbe BM |
85 | if ((acpi_gbl_FACS->length > 32) && (acpi_gbl_FACS->version >= 1)) { |
86 | acpi_gbl_FACS->xfirmware_waking_vector = 0; | |
d85988fa | 87 | } |
1da177e4 | 88 | |
4be44fcd | 89 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
90 | } |
91 | ||
8313524a BM |
92 | ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector) |
93 | ||
4f70e371 | 94 | #if ACPI_MACHINE_WIDTH == 64 |
44f6c012 | 95 | /******************************************************************************* |
1da177e4 | 96 | * |
d85988fa | 97 | * FUNCTION: acpi_set_firmware_waking_vector64 |
1da177e4 | 98 | * |
d85988fa BM |
99 | * PARAMETERS: physical_address - 64-bit physical address of ACPI protected |
100 | * mode entry point. | |
1da177e4 | 101 | * |
d85988fa | 102 | * RETURN: Status |
1da177e4 | 103 | * |
d85988fa | 104 | * DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if |
4f70e371 BM |
105 | * it exists in the table. This function is intended for use with |
106 | * 64-bit host operating systems. | |
1da177e4 LT |
107 | * |
108 | ******************************************************************************/ | |
1da177e4 | 109 | acpi_status |
d85988fa | 110 | acpi_set_firmware_waking_vector64(u64 physical_address) |
1da177e4 | 111 | { |
d85988fa | 112 | ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector64); |
1da177e4 | 113 | |
1da177e4 | 114 | |
d85988fa BM |
115 | /* Determine if the 64-bit vector actually exists */ |
116 | ||
009c4cbe | 117 | if ((acpi_gbl_FACS->length <= 32) || (acpi_gbl_FACS->version < 1)) { |
d85988fa BM |
118 | return_ACPI_STATUS(AE_NOT_EXIST); |
119 | } | |
120 | ||
121 | /* Clear 32-bit vector, set the 64-bit X_ vector */ | |
122 | ||
009c4cbe BM |
123 | acpi_gbl_FACS->firmware_waking_vector = 0; |
124 | acpi_gbl_FACS->xfirmware_waking_vector = physical_address; | |
1da177e4 | 125 | |
4be44fcd | 126 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 127 | } |
8313524a | 128 | |
d85988fa | 129 | ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64) |
4f70e371 | 130 | #endif |
d85988fa | 131 | |
44f6c012 | 132 | /******************************************************************************* |
1da177e4 LT |
133 | * |
134 | * FUNCTION: acpi_enter_sleep_state_prep | |
135 | * | |
136 | * PARAMETERS: sleep_state - Which sleep state to enter | |
137 | * | |
138 | * RETURN: Status | |
139 | * | |
140 | * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231) | |
141 | * This function must execute with interrupts enabled. | |
142 | * We break sleeping into 2 stages so that OSPM can handle | |
143 | * various OS-specific tasks between the two steps. | |
144 | * | |
145 | ******************************************************************************/ | |
4be44fcd | 146 | acpi_status acpi_enter_sleep_state_prep(u8 sleep_state) |
1da177e4 | 147 | { |
4be44fcd LB |
148 | acpi_status status; |
149 | struct acpi_object_list arg_list; | |
150 | union acpi_object arg; | |
1da177e4 | 151 | |
b229cf92 | 152 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep); |
1da177e4 | 153 | |
32c9ef99 BM |
154 | /* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */ |
155 | ||
4be44fcd LB |
156 | status = acpi_get_sleep_type_data(sleep_state, |
157 | &acpi_gbl_sleep_type_a, | |
158 | &acpi_gbl_sleep_type_b); | |
159 | if (ACPI_FAILURE(status)) { | |
160 | return_ACPI_STATUS(status); | |
1da177e4 LT |
161 | } |
162 | ||
163 | /* Setup parameter object */ | |
164 | ||
165 | arg_list.count = 1; | |
166 | arg_list.pointer = &arg; | |
167 | ||
168 | arg.type = ACPI_TYPE_INTEGER; | |
169 | arg.integer.value = sleep_state; | |
170 | ||
c95d47a8 | 171 | /* Run the _PTS method */ |
1da177e4 | 172 | |
4be44fcd LB |
173 | status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL); |
174 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
175 | return_ACPI_STATUS(status); | |
1da177e4 LT |
176 | } |
177 | ||
1da177e4 LT |
178 | /* Setup the argument to _SST */ |
179 | ||
180 | switch (sleep_state) { | |
181 | case ACPI_STATE_S0: | |
182 | arg.integer.value = ACPI_SST_WORKING; | |
183 | break; | |
184 | ||
185 | case ACPI_STATE_S1: | |
186 | case ACPI_STATE_S2: | |
187 | case ACPI_STATE_S3: | |
188 | arg.integer.value = ACPI_SST_SLEEPING; | |
189 | break; | |
190 | ||
191 | case ACPI_STATE_S4: | |
192 | arg.integer.value = ACPI_SST_SLEEP_CONTEXT; | |
193 | break; | |
194 | ||
195 | default: | |
4be44fcd | 196 | arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */ |
1da177e4 LT |
197 | break; |
198 | } | |
199 | ||
d52c79ac BM |
200 | /* |
201 | * Set the system indicators to show the desired sleep state. | |
202 | * _SST is an optional method (return no error if not found) | |
203 | */ | |
4be44fcd LB |
204 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
205 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 BM |
206 | ACPI_EXCEPTION((AE_INFO, status, |
207 | "While executing method _SST")); | |
1da177e4 LT |
208 | } |
209 | ||
d52c79ac | 210 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
211 | } |
212 | ||
8313524a BM |
213 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep) |
214 | ||
96f15efc LB |
215 | static unsigned int gts, bfs; |
216 | module_param(gts, uint, 0644); | |
217 | module_param(bfs, uint, 0644); | |
218 | MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend."); | |
219 | MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".); | |
220 | ||
44f6c012 | 221 | /******************************************************************************* |
1da177e4 LT |
222 | * |
223 | * FUNCTION: acpi_enter_sleep_state | |
224 | * | |
225 | * PARAMETERS: sleep_state - Which sleep state to enter | |
226 | * | |
227 | * RETURN: Status | |
228 | * | |
229 | * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231) | |
230 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
231 | * | |
232 | ******************************************************************************/ | |
4be44fcd | 233 | acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state) |
1da177e4 | 234 | { |
32c9ef99 BM |
235 | u32 pm1a_control; |
236 | u32 pm1b_control; | |
4be44fcd LB |
237 | struct acpi_bit_register_info *sleep_type_reg_info; |
238 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
239 | u32 in_value; | |
c95d47a8 RW |
240 | struct acpi_object_list arg_list; |
241 | union acpi_object arg; | |
4be44fcd | 242 | acpi_status status; |
1da177e4 | 243 | |
b229cf92 | 244 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state); |
1da177e4 LT |
245 | |
246 | if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) || | |
4be44fcd | 247 | (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) { |
f6a22b0b | 248 | ACPI_ERROR((AE_INFO, "Sleep values out of range: A=0x%X B=0x%X", |
b8e4d893 | 249 | acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b)); |
4be44fcd | 250 | return_ACPI_STATUS(AE_AML_OPERAND_VALUE); |
1da177e4 LT |
251 | } |
252 | ||
4be44fcd | 253 | sleep_type_reg_info = |
82d79b86 | 254 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE); |
4be44fcd LB |
255 | sleep_enable_reg_info = |
256 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
257 | |
258 | /* Clear wake status */ | |
259 | ||
768aaaf1 BM |
260 | status = |
261 | acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); | |
4be44fcd LB |
262 | if (ACPI_FAILURE(status)) { |
263 | return_ACPI_STATUS(status); | |
1da177e4 LT |
264 | } |
265 | ||
266 | /* Clear all fixed and general purpose status bits */ | |
267 | ||
d8c71b6d | 268 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
269 | if (ACPI_FAILURE(status)) { |
270 | return_ACPI_STATUS(status); | |
1da177e4 LT |
271 | } |
272 | ||
273 | /* | |
23b168d4 | 274 | * 1) Disable/Clear all GPEs |
1da177e4 LT |
275 | * 2) Enable all wakeup GPEs |
276 | */ | |
1d99967b AS |
277 | status = acpi_hw_disable_all_gpes(); |
278 | if (ACPI_FAILURE(status)) { | |
279 | return_ACPI_STATUS(status); | |
280 | } | |
1da177e4 LT |
281 | acpi_gbl_system_awake_and_running = FALSE; |
282 | ||
4be44fcd LB |
283 | status = acpi_hw_enable_all_wakeup_gpes(); |
284 | if (ACPI_FAILURE(status)) { | |
285 | return_ACPI_STATUS(status); | |
1da177e4 LT |
286 | } |
287 | ||
96f15efc LB |
288 | if (gts) { |
289 | /* Execute the _GTS method */ | |
c95d47a8 | 290 | |
96f15efc LB |
291 | arg_list.count = 1; |
292 | arg_list.pointer = &arg; | |
293 | arg.type = ACPI_TYPE_INTEGER; | |
294 | arg.integer.value = sleep_state; | |
c95d47a8 | 295 | |
96f15efc LB |
296 | status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL); |
297 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
298 | return_ACPI_STATUS(status); | |
299 | } | |
c95d47a8 RW |
300 | } |
301 | ||
1da177e4 LT |
302 | /* Get current value of PM1A control */ |
303 | ||
32c9ef99 BM |
304 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, |
305 | &pm1a_control); | |
4be44fcd LB |
306 | if (ACPI_FAILURE(status)) { |
307 | return_ACPI_STATUS(status); | |
1da177e4 | 308 | } |
4be44fcd | 309 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
b27d6597 | 310 | "Entering sleep state [S%u]\n", sleep_state)); |
1da177e4 | 311 | |
32c9ef99 | 312 | /* Clear the SLP_EN and SLP_TYP fields */ |
1da177e4 | 313 | |
32c9ef99 BM |
314 | pm1a_control &= ~(sleep_type_reg_info->access_bit_mask | |
315 | sleep_enable_reg_info->access_bit_mask); | |
316 | pm1b_control = pm1a_control; | |
1da177e4 | 317 | |
32c9ef99 | 318 | /* Insert the SLP_TYP bits */ |
1da177e4 | 319 | |
32c9ef99 | 320 | pm1a_control |= |
4be44fcd | 321 | (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); |
32c9ef99 | 322 | pm1b_control |= |
4be44fcd | 323 | (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position); |
1da177e4 LT |
324 | |
325 | /* | |
326 | * We split the writes of SLP_TYP and SLP_EN to workaround | |
327 | * poorly implemented hardware. | |
328 | */ | |
329 | ||
32c9ef99 | 330 | /* Write #1: write the SLP_TYP data to the PM1 Control registers */ |
1da177e4 | 331 | |
32c9ef99 | 332 | status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); |
4be44fcd LB |
333 | if (ACPI_FAILURE(status)) { |
334 | return_ACPI_STATUS(status); | |
1da177e4 LT |
335 | } |
336 | ||
32c9ef99 | 337 | /* Insert the sleep enable (SLP_EN) bit */ |
1da177e4 | 338 | |
32c9ef99 BM |
339 | pm1a_control |= sleep_enable_reg_info->access_bit_mask; |
340 | pm1b_control |= sleep_enable_reg_info->access_bit_mask; | |
1da177e4 | 341 | |
32c9ef99 | 342 | /* Flush caches, as per ACPI specification */ |
1da177e4 | 343 | |
4be44fcd | 344 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 345 | |
86886e55 JC |
346 | tboot_sleep(sleep_state, pm1a_control, pm1b_control); |
347 | ||
32c9ef99 | 348 | /* Write #2: Write both SLP_TYP + SLP_EN */ |
1da177e4 | 349 | |
32c9ef99 | 350 | status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); |
4be44fcd LB |
351 | if (ACPI_FAILURE(status)) { |
352 | return_ACPI_STATUS(status); | |
1da177e4 LT |
353 | } |
354 | ||
355 | if (sleep_state > ACPI_STATE_S3) { | |
356 | /* | |
44f6c012 RM |
357 | * We wanted to sleep > S3, but it didn't happen (by virtue of the |
358 | * fact that we are still executing!) | |
1da177e4 | 359 | * |
44f6c012 RM |
360 | * Wait ten seconds, then try again. This is to get S4/S5 to work on |
361 | * all machines. | |
1da177e4 | 362 | * |
d4913dc6 BM |
363 | * We wait so long to allow chipsets that poll this reg very slowly |
364 | * to still read the right value. Ideally, this block would go | |
1da177e4 LT |
365 | * away entirely. |
366 | */ | |
4be44fcd LB |
367 | acpi_os_stall(10000000); |
368 | ||
d30dc9ab | 369 | status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL, |
4be44fcd LB |
370 | sleep_enable_reg_info-> |
371 | access_bit_mask); | |
372 | if (ACPI_FAILURE(status)) { | |
373 | return_ACPI_STATUS(status); | |
1da177e4 LT |
374 | } |
375 | } | |
376 | ||
377 | /* Wait until we enter sleep state */ | |
378 | ||
379 | do { | |
50ffba1b | 380 | status = acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, |
2d571b33 | 381 | &in_value); |
4be44fcd LB |
382 | if (ACPI_FAILURE(status)) { |
383 | return_ACPI_STATUS(status); | |
1da177e4 LT |
384 | } |
385 | ||
386 | /* Spin until we wake */ | |
387 | ||
388 | } while (!in_value); | |
389 | ||
4be44fcd | 390 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 391 | } |
1da177e4 | 392 | |
8313524a | 393 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state) |
1da177e4 | 394 | |
44f6c012 | 395 | /******************************************************************************* |
1da177e4 LT |
396 | * |
397 | * FUNCTION: acpi_enter_sleep_state_s4bios | |
398 | * | |
399 | * PARAMETERS: None | |
400 | * | |
401 | * RETURN: Status | |
402 | * | |
403 | * DESCRIPTION: Perform a S4 bios request. | |
404 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
405 | * | |
406 | ******************************************************************************/ | |
4be44fcd | 407 | acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void) |
1da177e4 | 408 | { |
4be44fcd LB |
409 | u32 in_value; |
410 | acpi_status status; | |
1da177e4 | 411 | |
b229cf92 | 412 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios); |
1da177e4 | 413 | |
768aaaf1 BM |
414 | /* Clear the wake status bit (PM1) */ |
415 | ||
416 | status = | |
417 | acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); | |
4be44fcd LB |
418 | if (ACPI_FAILURE(status)) { |
419 | return_ACPI_STATUS(status); | |
1da177e4 LT |
420 | } |
421 | ||
d8c71b6d | 422 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
423 | if (ACPI_FAILURE(status)) { |
424 | return_ACPI_STATUS(status); | |
1da177e4 LT |
425 | } |
426 | ||
427 | /* | |
428 | * 1) Disable/Clear all GPEs | |
429 | * 2) Enable all wakeup GPEs | |
430 | */ | |
4be44fcd LB |
431 | status = acpi_hw_disable_all_gpes(); |
432 | if (ACPI_FAILURE(status)) { | |
433 | return_ACPI_STATUS(status); | |
1da177e4 LT |
434 | } |
435 | acpi_gbl_system_awake_and_running = FALSE; | |
436 | ||
4be44fcd LB |
437 | status = acpi_hw_enable_all_wakeup_gpes(); |
438 | if (ACPI_FAILURE(status)) { | |
439 | return_ACPI_STATUS(status); | |
1da177e4 LT |
440 | } |
441 | ||
4be44fcd | 442 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 443 | |
7f071903 | 444 | status = acpi_hw_write_port(acpi_gbl_FADT.smi_command, |
f3d2e786 | 445 | (u32) acpi_gbl_FADT.S4bios_request, 8); |
1da177e4 LT |
446 | |
447 | do { | |
448 | acpi_os_stall(1000); | |
50ffba1b BM |
449 | status = |
450 | acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value); | |
4be44fcd LB |
451 | if (ACPI_FAILURE(status)) { |
452 | return_ACPI_STATUS(status); | |
1da177e4 LT |
453 | } |
454 | } while (!in_value); | |
455 | ||
4be44fcd | 456 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 457 | } |
1da177e4 | 458 | |
8313524a | 459 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios) |
1da177e4 | 460 | |
44f6c012 | 461 | /******************************************************************************* |
1da177e4 | 462 | * |
c95d47a8 | 463 | * FUNCTION: acpi_leave_sleep_state_prep |
1da177e4 | 464 | * |
c95d47a8 | 465 | * PARAMETERS: sleep_state - Which sleep state we are exiting |
1da177e4 LT |
466 | * |
467 | * RETURN: Status | |
468 | * | |
c95d47a8 RW |
469 | * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a |
470 | * sleep. | |
471 | * Called with interrupts DISABLED. | |
1da177e4 LT |
472 | * |
473 | ******************************************************************************/ | |
c95d47a8 | 474 | acpi_status acpi_leave_sleep_state_prep(u8 sleep_state) |
1da177e4 | 475 | { |
4be44fcd LB |
476 | struct acpi_object_list arg_list; |
477 | union acpi_object arg; | |
478 | acpi_status status; | |
479 | struct acpi_bit_register_info *sleep_type_reg_info; | |
480 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
32c9ef99 BM |
481 | u32 pm1a_control; |
482 | u32 pm1b_control; | |
1da177e4 | 483 | |
c95d47a8 | 484 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep); |
1da177e4 LT |
485 | |
486 | /* | |
487 | * Set SLP_TYPE and SLP_EN to state S0. | |
488 | * This is unclear from the ACPI Spec, but it is required | |
489 | * by some machines. | |
490 | */ | |
4be44fcd LB |
491 | status = acpi_get_sleep_type_data(ACPI_STATE_S0, |
492 | &acpi_gbl_sleep_type_a, | |
493 | &acpi_gbl_sleep_type_b); | |
494 | if (ACPI_SUCCESS(status)) { | |
495 | sleep_type_reg_info = | |
82d79b86 | 496 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE); |
4be44fcd LB |
497 | sleep_enable_reg_info = |
498 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
499 | |
500 | /* Get current value of PM1A control */ | |
501 | ||
d30dc9ab | 502 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, |
32c9ef99 | 503 | &pm1a_control); |
4be44fcd | 504 | if (ACPI_SUCCESS(status)) { |
52fc0b02 | 505 | |
32c9ef99 | 506 | /* Clear the SLP_EN and SLP_TYP fields */ |
1da177e4 | 507 | |
32c9ef99 BM |
508 | pm1a_control &= ~(sleep_type_reg_info->access_bit_mask | |
509 | sleep_enable_reg_info-> | |
510 | access_bit_mask); | |
511 | pm1b_control = pm1a_control; | |
1da177e4 | 512 | |
32c9ef99 | 513 | /* Insert the SLP_TYP bits */ |
1da177e4 | 514 | |
d4913dc6 BM |
515 | pm1a_control |= (acpi_gbl_sleep_type_a << |
516 | sleep_type_reg_info->bit_position); | |
517 | pm1b_control |= (acpi_gbl_sleep_type_b << | |
518 | sleep_type_reg_info->bit_position); | |
1da177e4 | 519 | |
32c9ef99 | 520 | /* Write the control registers and ignore any errors */ |
1da177e4 | 521 | |
32c9ef99 BM |
522 | (void)acpi_hw_write_pm1_control(pm1a_control, |
523 | pm1b_control); | |
1da177e4 LT |
524 | } |
525 | } | |
526 | ||
96f15efc LB |
527 | if (bfs) { |
528 | /* Execute the _BFS method */ | |
c95d47a8 | 529 | |
96f15efc LB |
530 | arg_list.count = 1; |
531 | arg_list.pointer = &arg; | |
532 | arg.type = ACPI_TYPE_INTEGER; | |
533 | arg.integer.value = sleep_state; | |
c95d47a8 | 534 | |
96f15efc LB |
535 | status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL); |
536 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
537 | ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS")); | |
538 | } | |
c95d47a8 | 539 | } |
c95d47a8 RW |
540 | return_ACPI_STATUS(status); |
541 | } | |
542 | ||
543 | /******************************************************************************* | |
544 | * | |
545 | * FUNCTION: acpi_leave_sleep_state | |
546 | * | |
547 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
548 | * | |
549 | * RETURN: Status | |
550 | * | |
551 | * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep | |
552 | * Called with interrupts ENABLED. | |
553 | * | |
554 | ******************************************************************************/ | |
555 | acpi_status acpi_leave_sleep_state(u8 sleep_state) | |
556 | { | |
557 | struct acpi_object_list arg_list; | |
558 | union acpi_object arg; | |
559 | acpi_status status; | |
560 | ||
561 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state); | |
562 | ||
1da177e4 LT |
563 | /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ |
564 | ||
565 | acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; | |
566 | ||
567 | /* Setup parameter object */ | |
568 | ||
569 | arg_list.count = 1; | |
570 | arg_list.pointer = &arg; | |
571 | arg.type = ACPI_TYPE_INTEGER; | |
572 | ||
573 | /* Ignore any errors from these methods */ | |
574 | ||
575 | arg.integer.value = ACPI_SST_WAKING; | |
4be44fcd LB |
576 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
577 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 578 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
579 | } |
580 | ||
1da177e4 | 581 | /* |
79d2dfaa TR |
582 | * GPEs must be enabled before _WAK is called as GPEs |
583 | * might get fired there | |
584 | * | |
1da177e4 LT |
585 | * Restore the GPEs: |
586 | * 1) Disable/Clear all GPEs | |
587 | * 2) Enable all runtime GPEs | |
588 | */ | |
4be44fcd LB |
589 | status = acpi_hw_disable_all_gpes(); |
590 | if (ACPI_FAILURE(status)) { | |
591 | return_ACPI_STATUS(status); | |
1da177e4 | 592 | } |
4be44fcd LB |
593 | status = acpi_hw_enable_all_runtime_gpes(); |
594 | if (ACPI_FAILURE(status)) { | |
595 | return_ACPI_STATUS(status); | |
1da177e4 LT |
596 | } |
597 | ||
314ccd64 | 598 | arg.integer.value = sleep_state; |
79d2dfaa TR |
599 | status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL); |
600 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
601 | ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK")); | |
602 | } | |
603 | /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ | |
604 | ||
a68823ee MG |
605 | /* |
606 | * Some BIOSes assume that WAK_STS will be cleared on resume and use | |
607 | * it to determine whether the system is rebooting or resuming. Clear | |
608 | * it for compatibility. | |
609 | */ | |
50ffba1b | 610 | acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, 1); |
a68823ee | 611 | |
79d2dfaa TR |
612 | acpi_gbl_system_awake_and_running = TRUE; |
613 | ||
1da177e4 LT |
614 | /* Enable power button */ |
615 | ||
4be44fcd | 616 | (void) |
50ffba1b | 617 | acpi_write_bit_register(acpi_gbl_fixed_event_info |
768aaaf1 BM |
618 | [ACPI_EVENT_POWER_BUTTON]. |
619 | enable_register_id, ACPI_ENABLE_EVENT); | |
44f6c012 | 620 | |
4be44fcd | 621 | (void) |
50ffba1b | 622 | acpi_write_bit_register(acpi_gbl_fixed_event_info |
768aaaf1 BM |
623 | [ACPI_EVENT_POWER_BUTTON]. |
624 | status_register_id, ACPI_CLEAR_STATUS); | |
1da177e4 LT |
625 | |
626 | arg.integer.value = ACPI_SST_WORKING; | |
4be44fcd LB |
627 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
628 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 629 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
630 | } |
631 | ||
4be44fcd | 632 | return_ACPI_STATUS(status); |
1da177e4 | 633 | } |
8313524a BM |
634 | |
635 | ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state) |