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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> |
cc4b859c | 49 | #include <linux/module.h> |
1da177e4 LT |
50 | |
51 | #define _COMPONENT ACPI_HARDWARE | |
4be44fcd | 52 | ACPI_MODULE_NAME("hwsleep") |
1da177e4 | 53 | |
44f6c012 | 54 | /******************************************************************************* |
1da177e4 LT |
55 | * |
56 | * FUNCTION: acpi_set_firmware_waking_vector | |
57 | * | |
d85988fa | 58 | * PARAMETERS: physical_address - 32-bit physical address of ACPI real mode |
1da177e4 LT |
59 | * entry point. |
60 | * | |
61 | * RETURN: Status | |
62 | * | |
d85988fa | 63 | * DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS |
1da177e4 LT |
64 | * |
65 | ******************************************************************************/ | |
1da177e4 | 66 | acpi_status |
d85988fa | 67 | acpi_set_firmware_waking_vector(u32 physical_address) |
1da177e4 | 68 | { |
b229cf92 | 69 | ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector); |
1da177e4 | 70 | |
f3d2e786 | 71 | |
a6629105 RW |
72 | /* |
73 | * According to the ACPI specification 2.0c and later, the 64-bit | |
74 | * waking vector should be cleared and the 32-bit waking vector should | |
75 | * be used, unless we want the wake-up code to be called by the BIOS in | |
76 | * Protected Mode. Some systems (for example HP dv5-1004nr) are known | |
77 | * to fail to resume if the 64-bit vector is used. | |
78 | */ | |
a6629105 | 79 | |
d85988fa BM |
80 | /* Set the 32-bit vector */ |
81 | ||
009c4cbe | 82 | acpi_gbl_FACS->firmware_waking_vector = physical_address; |
d85988fa BM |
83 | |
84 | /* Clear the 64-bit vector if it exists */ | |
85 | ||
009c4cbe BM |
86 | if ((acpi_gbl_FACS->length > 32) && (acpi_gbl_FACS->version >= 1)) { |
87 | acpi_gbl_FACS->xfirmware_waking_vector = 0; | |
d85988fa | 88 | } |
1da177e4 | 89 | |
4be44fcd | 90 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
91 | } |
92 | ||
8313524a BM |
93 | ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector) |
94 | ||
4f70e371 | 95 | #if ACPI_MACHINE_WIDTH == 64 |
44f6c012 | 96 | /******************************************************************************* |
1da177e4 | 97 | * |
d85988fa | 98 | * FUNCTION: acpi_set_firmware_waking_vector64 |
1da177e4 | 99 | * |
d85988fa BM |
100 | * PARAMETERS: physical_address - 64-bit physical address of ACPI protected |
101 | * mode entry point. | |
1da177e4 | 102 | * |
d85988fa | 103 | * RETURN: Status |
1da177e4 | 104 | * |
d85988fa | 105 | * DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if |
4f70e371 BM |
106 | * it exists in the table. This function is intended for use with |
107 | * 64-bit host operating systems. | |
1da177e4 LT |
108 | * |
109 | ******************************************************************************/ | |
1da177e4 | 110 | acpi_status |
d85988fa | 111 | acpi_set_firmware_waking_vector64(u64 physical_address) |
1da177e4 | 112 | { |
d85988fa | 113 | ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector64); |
1da177e4 | 114 | |
1da177e4 | 115 | |
d85988fa BM |
116 | /* Determine if the 64-bit vector actually exists */ |
117 | ||
009c4cbe | 118 | if ((acpi_gbl_FACS->length <= 32) || (acpi_gbl_FACS->version < 1)) { |
d85988fa BM |
119 | return_ACPI_STATUS(AE_NOT_EXIST); |
120 | } | |
121 | ||
122 | /* Clear 32-bit vector, set the 64-bit X_ vector */ | |
123 | ||
009c4cbe BM |
124 | acpi_gbl_FACS->firmware_waking_vector = 0; |
125 | acpi_gbl_FACS->xfirmware_waking_vector = physical_address; | |
1da177e4 | 126 | |
4be44fcd | 127 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 128 | } |
8313524a | 129 | |
d85988fa | 130 | ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64) |
4f70e371 | 131 | #endif |
d85988fa | 132 | |
44f6c012 | 133 | /******************************************************************************* |
1da177e4 LT |
134 | * |
135 | * FUNCTION: acpi_enter_sleep_state_prep | |
136 | * | |
137 | * PARAMETERS: sleep_state - Which sleep state to enter | |
138 | * | |
139 | * RETURN: Status | |
140 | * | |
141 | * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231) | |
142 | * This function must execute with interrupts enabled. | |
143 | * We break sleeping into 2 stages so that OSPM can handle | |
144 | * various OS-specific tasks between the two steps. | |
145 | * | |
146 | ******************************************************************************/ | |
4be44fcd | 147 | acpi_status acpi_enter_sleep_state_prep(u8 sleep_state) |
1da177e4 | 148 | { |
4be44fcd LB |
149 | acpi_status status; |
150 | struct acpi_object_list arg_list; | |
151 | union acpi_object arg; | |
1da177e4 | 152 | |
b229cf92 | 153 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep); |
1da177e4 | 154 | |
32c9ef99 BM |
155 | /* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */ |
156 | ||
4be44fcd LB |
157 | status = acpi_get_sleep_type_data(sleep_state, |
158 | &acpi_gbl_sleep_type_a, | |
159 | &acpi_gbl_sleep_type_b); | |
160 | if (ACPI_FAILURE(status)) { | |
161 | return_ACPI_STATUS(status); | |
1da177e4 LT |
162 | } |
163 | ||
164 | /* Setup parameter object */ | |
165 | ||
166 | arg_list.count = 1; | |
167 | arg_list.pointer = &arg; | |
168 | ||
169 | arg.type = ACPI_TYPE_INTEGER; | |
170 | arg.integer.value = sleep_state; | |
171 | ||
c95d47a8 | 172 | /* Run the _PTS method */ |
1da177e4 | 173 | |
4be44fcd LB |
174 | status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL); |
175 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
176 | return_ACPI_STATUS(status); | |
1da177e4 LT |
177 | } |
178 | ||
1da177e4 LT |
179 | /* Setup the argument to _SST */ |
180 | ||
181 | switch (sleep_state) { | |
182 | case ACPI_STATE_S0: | |
183 | arg.integer.value = ACPI_SST_WORKING; | |
184 | break; | |
185 | ||
186 | case ACPI_STATE_S1: | |
187 | case ACPI_STATE_S2: | |
188 | case ACPI_STATE_S3: | |
189 | arg.integer.value = ACPI_SST_SLEEPING; | |
190 | break; | |
191 | ||
192 | case ACPI_STATE_S4: | |
193 | arg.integer.value = ACPI_SST_SLEEP_CONTEXT; | |
194 | break; | |
195 | ||
196 | default: | |
4be44fcd | 197 | arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */ |
1da177e4 LT |
198 | break; |
199 | } | |
200 | ||
d52c79ac BM |
201 | /* |
202 | * Set the system indicators to show the desired sleep state. | |
203 | * _SST is an optional method (return no error if not found) | |
204 | */ | |
4be44fcd LB |
205 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
206 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 BM |
207 | ACPI_EXCEPTION((AE_INFO, status, |
208 | "While executing method _SST")); | |
1da177e4 LT |
209 | } |
210 | ||
d52c79ac | 211 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
212 | } |
213 | ||
8313524a BM |
214 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep) |
215 | ||
96f15efc LB |
216 | static unsigned int gts, bfs; |
217 | module_param(gts, uint, 0644); | |
218 | module_param(bfs, uint, 0644); | |
219 | MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend."); | |
220 | MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".); | |
221 | ||
44f6c012 | 222 | /******************************************************************************* |
1da177e4 LT |
223 | * |
224 | * FUNCTION: acpi_enter_sleep_state | |
225 | * | |
226 | * PARAMETERS: sleep_state - Which sleep state to enter | |
227 | * | |
228 | * RETURN: Status | |
229 | * | |
230 | * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231) | |
231 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
232 | * | |
233 | ******************************************************************************/ | |
4be44fcd | 234 | acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state) |
1da177e4 | 235 | { |
32c9ef99 BM |
236 | u32 pm1a_control; |
237 | u32 pm1b_control; | |
4be44fcd LB |
238 | struct acpi_bit_register_info *sleep_type_reg_info; |
239 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
240 | u32 in_value; | |
c95d47a8 RW |
241 | struct acpi_object_list arg_list; |
242 | union acpi_object arg; | |
4be44fcd | 243 | acpi_status status; |
1da177e4 | 244 | |
b229cf92 | 245 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state); |
1da177e4 LT |
246 | |
247 | if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) || | |
4be44fcd | 248 | (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) { |
f6a22b0b | 249 | ACPI_ERROR((AE_INFO, "Sleep values out of range: A=0x%X B=0x%X", |
b8e4d893 | 250 | acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b)); |
4be44fcd | 251 | return_ACPI_STATUS(AE_AML_OPERAND_VALUE); |
1da177e4 LT |
252 | } |
253 | ||
4be44fcd | 254 | sleep_type_reg_info = |
82d79b86 | 255 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE); |
4be44fcd LB |
256 | sleep_enable_reg_info = |
257 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
258 | |
259 | /* Clear wake status */ | |
260 | ||
768aaaf1 BM |
261 | status = |
262 | acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); | |
4be44fcd LB |
263 | if (ACPI_FAILURE(status)) { |
264 | return_ACPI_STATUS(status); | |
1da177e4 LT |
265 | } |
266 | ||
267 | /* Clear all fixed and general purpose status bits */ | |
268 | ||
d8c71b6d | 269 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
270 | if (ACPI_FAILURE(status)) { |
271 | return_ACPI_STATUS(status); | |
1da177e4 LT |
272 | } |
273 | ||
274 | /* | |
23b168d4 | 275 | * 1) Disable/Clear all GPEs |
1da177e4 LT |
276 | * 2) Enable all wakeup GPEs |
277 | */ | |
1d99967b AS |
278 | status = acpi_hw_disable_all_gpes(); |
279 | if (ACPI_FAILURE(status)) { | |
280 | return_ACPI_STATUS(status); | |
281 | } | |
1da177e4 LT |
282 | acpi_gbl_system_awake_and_running = FALSE; |
283 | ||
4be44fcd LB |
284 | status = acpi_hw_enable_all_wakeup_gpes(); |
285 | if (ACPI_FAILURE(status)) { | |
286 | return_ACPI_STATUS(status); | |
1da177e4 LT |
287 | } |
288 | ||
96f15efc LB |
289 | if (gts) { |
290 | /* Execute the _GTS method */ | |
c95d47a8 | 291 | |
96f15efc LB |
292 | arg_list.count = 1; |
293 | arg_list.pointer = &arg; | |
294 | arg.type = ACPI_TYPE_INTEGER; | |
295 | arg.integer.value = sleep_state; | |
c95d47a8 | 296 | |
96f15efc LB |
297 | status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL); |
298 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
299 | return_ACPI_STATUS(status); | |
300 | } | |
c95d47a8 RW |
301 | } |
302 | ||
1da177e4 LT |
303 | /* Get current value of PM1A control */ |
304 | ||
32c9ef99 BM |
305 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, |
306 | &pm1a_control); | |
4be44fcd LB |
307 | if (ACPI_FAILURE(status)) { |
308 | return_ACPI_STATUS(status); | |
1da177e4 | 309 | } |
4be44fcd | 310 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
b27d6597 | 311 | "Entering sleep state [S%u]\n", sleep_state)); |
1da177e4 | 312 | |
32c9ef99 | 313 | /* Clear the SLP_EN and SLP_TYP fields */ |
1da177e4 | 314 | |
32c9ef99 BM |
315 | pm1a_control &= ~(sleep_type_reg_info->access_bit_mask | |
316 | sleep_enable_reg_info->access_bit_mask); | |
317 | pm1b_control = pm1a_control; | |
1da177e4 | 318 | |
32c9ef99 | 319 | /* Insert the SLP_TYP bits */ |
1da177e4 | 320 | |
32c9ef99 | 321 | pm1a_control |= |
4be44fcd | 322 | (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); |
32c9ef99 | 323 | pm1b_control |= |
4be44fcd | 324 | (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position); |
1da177e4 LT |
325 | |
326 | /* | |
327 | * We split the writes of SLP_TYP and SLP_EN to workaround | |
328 | * poorly implemented hardware. | |
329 | */ | |
330 | ||
32c9ef99 | 331 | /* Write #1: write the SLP_TYP data to the PM1 Control registers */ |
1da177e4 | 332 | |
32c9ef99 | 333 | status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); |
4be44fcd LB |
334 | if (ACPI_FAILURE(status)) { |
335 | return_ACPI_STATUS(status); | |
1da177e4 LT |
336 | } |
337 | ||
32c9ef99 | 338 | /* Insert the sleep enable (SLP_EN) bit */ |
1da177e4 | 339 | |
32c9ef99 BM |
340 | pm1a_control |= sleep_enable_reg_info->access_bit_mask; |
341 | pm1b_control |= sleep_enable_reg_info->access_bit_mask; | |
1da177e4 | 342 | |
32c9ef99 | 343 | /* Flush caches, as per ACPI specification */ |
1da177e4 | 344 | |
4be44fcd | 345 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 346 | |
86886e55 JC |
347 | tboot_sleep(sleep_state, pm1a_control, pm1b_control); |
348 | ||
32c9ef99 | 349 | /* Write #2: Write both SLP_TYP + SLP_EN */ |
1da177e4 | 350 | |
32c9ef99 | 351 | status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); |
4be44fcd LB |
352 | if (ACPI_FAILURE(status)) { |
353 | return_ACPI_STATUS(status); | |
1da177e4 LT |
354 | } |
355 | ||
356 | if (sleep_state > ACPI_STATE_S3) { | |
357 | /* | |
44f6c012 RM |
358 | * We wanted to sleep > S3, but it didn't happen (by virtue of the |
359 | * fact that we are still executing!) | |
1da177e4 | 360 | * |
44f6c012 RM |
361 | * Wait ten seconds, then try again. This is to get S4/S5 to work on |
362 | * all machines. | |
1da177e4 | 363 | * |
d4913dc6 BM |
364 | * We wait so long to allow chipsets that poll this reg very slowly |
365 | * to still read the right value. Ideally, this block would go | |
1da177e4 LT |
366 | * away entirely. |
367 | */ | |
4be44fcd LB |
368 | acpi_os_stall(10000000); |
369 | ||
d30dc9ab | 370 | status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL, |
4be44fcd LB |
371 | sleep_enable_reg_info-> |
372 | access_bit_mask); | |
373 | if (ACPI_FAILURE(status)) { | |
374 | return_ACPI_STATUS(status); | |
1da177e4 LT |
375 | } |
376 | } | |
377 | ||
378 | /* Wait until we enter sleep state */ | |
379 | ||
380 | do { | |
50ffba1b | 381 | status = acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, |
2d571b33 | 382 | &in_value); |
4be44fcd LB |
383 | if (ACPI_FAILURE(status)) { |
384 | return_ACPI_STATUS(status); | |
1da177e4 LT |
385 | } |
386 | ||
387 | /* Spin until we wake */ | |
388 | ||
389 | } while (!in_value); | |
390 | ||
4be44fcd | 391 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 392 | } |
1da177e4 | 393 | |
8313524a | 394 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state) |
1da177e4 | 395 | |
44f6c012 | 396 | /******************************************************************************* |
1da177e4 LT |
397 | * |
398 | * FUNCTION: acpi_enter_sleep_state_s4bios | |
399 | * | |
400 | * PARAMETERS: None | |
401 | * | |
402 | * RETURN: Status | |
403 | * | |
404 | * DESCRIPTION: Perform a S4 bios request. | |
405 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
406 | * | |
407 | ******************************************************************************/ | |
4be44fcd | 408 | acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void) |
1da177e4 | 409 | { |
4be44fcd LB |
410 | u32 in_value; |
411 | acpi_status status; | |
1da177e4 | 412 | |
b229cf92 | 413 | ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios); |
1da177e4 | 414 | |
768aaaf1 BM |
415 | /* Clear the wake status bit (PM1) */ |
416 | ||
417 | status = | |
418 | acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); | |
4be44fcd LB |
419 | if (ACPI_FAILURE(status)) { |
420 | return_ACPI_STATUS(status); | |
1da177e4 LT |
421 | } |
422 | ||
d8c71b6d | 423 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
424 | if (ACPI_FAILURE(status)) { |
425 | return_ACPI_STATUS(status); | |
1da177e4 LT |
426 | } |
427 | ||
428 | /* | |
429 | * 1) Disable/Clear all GPEs | |
430 | * 2) Enable all wakeup GPEs | |
431 | */ | |
4be44fcd LB |
432 | status = acpi_hw_disable_all_gpes(); |
433 | if (ACPI_FAILURE(status)) { | |
434 | return_ACPI_STATUS(status); | |
1da177e4 LT |
435 | } |
436 | acpi_gbl_system_awake_and_running = FALSE; | |
437 | ||
4be44fcd LB |
438 | status = acpi_hw_enable_all_wakeup_gpes(); |
439 | if (ACPI_FAILURE(status)) { | |
440 | return_ACPI_STATUS(status); | |
1da177e4 LT |
441 | } |
442 | ||
4be44fcd | 443 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 444 | |
7f071903 | 445 | status = acpi_hw_write_port(acpi_gbl_FADT.smi_command, |
f3d2e786 | 446 | (u32) acpi_gbl_FADT.S4bios_request, 8); |
1da177e4 LT |
447 | |
448 | do { | |
449 | acpi_os_stall(1000); | |
50ffba1b BM |
450 | status = |
451 | acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value); | |
4be44fcd LB |
452 | if (ACPI_FAILURE(status)) { |
453 | return_ACPI_STATUS(status); | |
1da177e4 LT |
454 | } |
455 | } while (!in_value); | |
456 | ||
4be44fcd | 457 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 458 | } |
1da177e4 | 459 | |
8313524a | 460 | ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios) |
1da177e4 | 461 | |
44f6c012 | 462 | /******************************************************************************* |
1da177e4 | 463 | * |
c95d47a8 | 464 | * FUNCTION: acpi_leave_sleep_state_prep |
1da177e4 | 465 | * |
c95d47a8 | 466 | * PARAMETERS: sleep_state - Which sleep state we are exiting |
1da177e4 LT |
467 | * |
468 | * RETURN: Status | |
469 | * | |
c95d47a8 RW |
470 | * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a |
471 | * sleep. | |
472 | * Called with interrupts DISABLED. | |
1da177e4 LT |
473 | * |
474 | ******************************************************************************/ | |
c95d47a8 | 475 | acpi_status acpi_leave_sleep_state_prep(u8 sleep_state) |
1da177e4 | 476 | { |
4be44fcd LB |
477 | struct acpi_object_list arg_list; |
478 | union acpi_object arg; | |
479 | acpi_status status; | |
480 | struct acpi_bit_register_info *sleep_type_reg_info; | |
481 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
32c9ef99 BM |
482 | u32 pm1a_control; |
483 | u32 pm1b_control; | |
1da177e4 | 484 | |
c95d47a8 | 485 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep); |
1da177e4 LT |
486 | |
487 | /* | |
488 | * Set SLP_TYPE and SLP_EN to state S0. | |
489 | * This is unclear from the ACPI Spec, but it is required | |
490 | * by some machines. | |
491 | */ | |
4be44fcd LB |
492 | status = acpi_get_sleep_type_data(ACPI_STATE_S0, |
493 | &acpi_gbl_sleep_type_a, | |
494 | &acpi_gbl_sleep_type_b); | |
495 | if (ACPI_SUCCESS(status)) { | |
496 | sleep_type_reg_info = | |
82d79b86 | 497 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE); |
4be44fcd LB |
498 | sleep_enable_reg_info = |
499 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
500 | |
501 | /* Get current value of PM1A control */ | |
502 | ||
d30dc9ab | 503 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, |
32c9ef99 | 504 | &pm1a_control); |
4be44fcd | 505 | if (ACPI_SUCCESS(status)) { |
52fc0b02 | 506 | |
32c9ef99 | 507 | /* Clear the SLP_EN and SLP_TYP fields */ |
1da177e4 | 508 | |
32c9ef99 BM |
509 | pm1a_control &= ~(sleep_type_reg_info->access_bit_mask | |
510 | sleep_enable_reg_info-> | |
511 | access_bit_mask); | |
512 | pm1b_control = pm1a_control; | |
1da177e4 | 513 | |
32c9ef99 | 514 | /* Insert the SLP_TYP bits */ |
1da177e4 | 515 | |
d4913dc6 BM |
516 | pm1a_control |= (acpi_gbl_sleep_type_a << |
517 | sleep_type_reg_info->bit_position); | |
518 | pm1b_control |= (acpi_gbl_sleep_type_b << | |
519 | sleep_type_reg_info->bit_position); | |
1da177e4 | 520 | |
32c9ef99 | 521 | /* Write the control registers and ignore any errors */ |
1da177e4 | 522 | |
32c9ef99 BM |
523 | (void)acpi_hw_write_pm1_control(pm1a_control, |
524 | pm1b_control); | |
1da177e4 LT |
525 | } |
526 | } | |
527 | ||
96f15efc LB |
528 | if (bfs) { |
529 | /* Execute the _BFS method */ | |
c95d47a8 | 530 | |
96f15efc LB |
531 | arg_list.count = 1; |
532 | arg_list.pointer = &arg; | |
533 | arg.type = ACPI_TYPE_INTEGER; | |
534 | arg.integer.value = sleep_state; | |
c95d47a8 | 535 | |
96f15efc LB |
536 | status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL); |
537 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
538 | ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS")); | |
539 | } | |
c95d47a8 | 540 | } |
c95d47a8 RW |
541 | return_ACPI_STATUS(status); |
542 | } | |
543 | ||
544 | /******************************************************************************* | |
545 | * | |
546 | * FUNCTION: acpi_leave_sleep_state | |
547 | * | |
548 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
549 | * | |
550 | * RETURN: Status | |
551 | * | |
552 | * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep | |
553 | * Called with interrupts ENABLED. | |
554 | * | |
555 | ******************************************************************************/ | |
556 | acpi_status acpi_leave_sleep_state(u8 sleep_state) | |
557 | { | |
558 | struct acpi_object_list arg_list; | |
559 | union acpi_object arg; | |
560 | acpi_status status; | |
561 | ||
562 | ACPI_FUNCTION_TRACE(acpi_leave_sleep_state); | |
563 | ||
1da177e4 LT |
564 | /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ |
565 | ||
566 | acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; | |
567 | ||
568 | /* Setup parameter object */ | |
569 | ||
570 | arg_list.count = 1; | |
571 | arg_list.pointer = &arg; | |
572 | arg.type = ACPI_TYPE_INTEGER; | |
573 | ||
574 | /* Ignore any errors from these methods */ | |
575 | ||
576 | arg.integer.value = ACPI_SST_WAKING; | |
4be44fcd LB |
577 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
578 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 579 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
580 | } |
581 | ||
1da177e4 | 582 | /* |
79d2dfaa TR |
583 | * GPEs must be enabled before _WAK is called as GPEs |
584 | * might get fired there | |
585 | * | |
1da177e4 LT |
586 | * Restore the GPEs: |
587 | * 1) Disable/Clear all GPEs | |
588 | * 2) Enable all runtime GPEs | |
589 | */ | |
4be44fcd LB |
590 | status = acpi_hw_disable_all_gpes(); |
591 | if (ACPI_FAILURE(status)) { | |
592 | return_ACPI_STATUS(status); | |
1da177e4 | 593 | } |
4be44fcd LB |
594 | status = acpi_hw_enable_all_runtime_gpes(); |
595 | if (ACPI_FAILURE(status)) { | |
596 | return_ACPI_STATUS(status); | |
1da177e4 LT |
597 | } |
598 | ||
314ccd64 | 599 | arg.integer.value = sleep_state; |
79d2dfaa TR |
600 | status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL); |
601 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
602 | ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK")); | |
603 | } | |
604 | /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ | |
605 | ||
a68823ee MG |
606 | /* |
607 | * Some BIOSes assume that WAK_STS will be cleared on resume and use | |
608 | * it to determine whether the system is rebooting or resuming. Clear | |
609 | * it for compatibility. | |
610 | */ | |
50ffba1b | 611 | acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, 1); |
a68823ee | 612 | |
79d2dfaa TR |
613 | acpi_gbl_system_awake_and_running = TRUE; |
614 | ||
1da177e4 LT |
615 | /* Enable power button */ |
616 | ||
4be44fcd | 617 | (void) |
50ffba1b | 618 | acpi_write_bit_register(acpi_gbl_fixed_event_info |
768aaaf1 BM |
619 | [ACPI_EVENT_POWER_BUTTON]. |
620 | enable_register_id, ACPI_ENABLE_EVENT); | |
44f6c012 | 621 | |
4be44fcd | 622 | (void) |
50ffba1b | 623 | acpi_write_bit_register(acpi_gbl_fixed_event_info |
768aaaf1 BM |
624 | [ACPI_EVENT_POWER_BUTTON]. |
625 | status_register_id, ACPI_CLEAR_STATUS); | |
1da177e4 LT |
626 | |
627 | arg.integer.value = ACPI_SST_WORKING; | |
4be44fcd LB |
628 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
629 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 | 630 | ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); |
1da177e4 LT |
631 | } |
632 | ||
4be44fcd | 633 | return_ACPI_STATUS(status); |
1da177e4 | 634 | } |
8313524a BM |
635 | |
636 | ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state) |