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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
2feec47d | 3 | * Name: hwsleep.c - ACPI Hardware Sleep/Wake Support Functions |
1da177e4 LT |
4 | * |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
77848130 | 8 | * Copyright (C) 2000 - 2012, Intel Corp. |
1da177e4 LT |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
1da177e4 | 44 | #include <acpi/acpi.h> |
e2f7a777 | 45 | #include "accommon.h" |
69575d38 | 46 | #include <linux/tboot.h> |
cc4b859c | 47 | #include <linux/module.h> |
1da177e4 LT |
48 | |
49 | #define _COMPONENT ACPI_HARDWARE | |
4be44fcd | 50 | ACPI_MODULE_NAME("hwsleep") |
1da177e4 | 51 | |
2feec47d BM |
52 | /* Local prototypes */ |
53 | static void acpi_hw_execute_GTS(u8 sleep_state); | |
54 | ||
55 | static void acpi_hw_execute_BFS(u8 sleep_state); | |
56 | ||
57 | static void acpi_hw_execute_WAK(u8 sleep_state); | |
58 | ||
59 | static unsigned int gts, bfs; | |
60 | module_param(gts, uint, 0644); | |
61 | module_param(bfs, uint, 0644); | |
62 | MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend."); | |
63 | MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".); | |
64 | ||
44f6c012 | 65 | /******************************************************************************* |
1da177e4 | 66 | * |
2feec47d | 67 | * FUNCTION: acpi_hw_execute_GTS |
1da177e4 | 68 | * |
2feec47d | 69 | * PARAMETERS: sleep_state - Sleep state that will be entered |
1da177e4 | 70 | * |
2feec47d | 71 | * RETURN: None |
1da177e4 | 72 | * |
2feec47d | 73 | * DESCRIPTION: Execute the optional _GTS method (Going To Sleep) |
1da177e4 LT |
74 | * |
75 | ******************************************************************************/ | |
f3d2e786 | 76 | |
2feec47d BM |
77 | static void acpi_hw_execute_GTS(u8 sleep_state) |
78 | { | |
79 | struct acpi_object_list arg_list; | |
80 | union acpi_object arg; | |
81 | acpi_status status; | |
a6629105 | 82 | |
2feec47d BM |
83 | if (!gts) |
84 | return; | |
d85988fa | 85 | |
2feec47d | 86 | /* One argument, sleep_state */ |
d85988fa | 87 | |
2feec47d BM |
88 | arg_list.count = 1; |
89 | arg_list.pointer = &arg; | |
90 | arg.type = ACPI_TYPE_INTEGER; | |
91 | arg.integer.value = sleep_state; | |
d85988fa | 92 | |
2feec47d BM |
93 | status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL); |
94 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
95 | ACPI_EXCEPTION((AE_INFO, status, | |
96 | "While executing method _GTS")); | |
d85988fa | 97 | } |
1da177e4 LT |
98 | } |
99 | ||
44f6c012 | 100 | /******************************************************************************* |
1da177e4 | 101 | * |
2feec47d | 102 | * FUNCTION: acpi_hw_execute_BFS |
1da177e4 | 103 | * |
2feec47d | 104 | * PARAMETERS: sleep_state - Which sleep state we just exited |
1da177e4 | 105 | * |
2feec47d | 106 | * RETURN: None |
1da177e4 | 107 | * |
2feec47d | 108 | * DESCRIPTION: Execute the optional _BFS method (Back From Sleep) |
1da177e4 LT |
109 | * |
110 | ******************************************************************************/ | |
1da177e4 | 111 | |
2feec47d BM |
112 | static void acpi_hw_execute_BFS(u8 sleep_state) |
113 | { | |
114 | struct acpi_object_list arg_list; | |
115 | union acpi_object arg; | |
116 | acpi_status status; | |
d85988fa | 117 | |
2feec47d BM |
118 | if (!bfs) |
119 | return; | |
d85988fa | 120 | |
2feec47d | 121 | /* One argument, sleep_state */ |
d85988fa | 122 | |
2feec47d BM |
123 | arg_list.count = 1; |
124 | arg_list.pointer = &arg; | |
125 | arg.type = ACPI_TYPE_INTEGER; | |
126 | arg.integer.value = sleep_state; | |
1da177e4 | 127 | |
2feec47d BM |
128 | status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL); |
129 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
130 | ACPI_EXCEPTION((AE_INFO, status, | |
131 | "While executing method _BFS")); | |
132 | } | |
1da177e4 | 133 | } |
8313524a | 134 | |
44f6c012 | 135 | /******************************************************************************* |
1da177e4 | 136 | * |
2feec47d | 137 | * FUNCTION: acpi_hw_execute_WAK |
1da177e4 | 138 | * |
2feec47d | 139 | * PARAMETERS: sleep_state - Which sleep state we just exited |
1da177e4 | 140 | * |
2feec47d | 141 | * RETURN: None |
1da177e4 | 142 | * |
2feec47d | 143 | * DESCRIPTION: Execute the _WAK method (System Wake) |
1da177e4 LT |
144 | * |
145 | ******************************************************************************/ | |
2feec47d BM |
146 | |
147 | static void acpi_hw_execute_WAK(u8 sleep_state) | |
1da177e4 | 148 | { |
4be44fcd LB |
149 | struct acpi_object_list arg_list; |
150 | union acpi_object arg; | |
2feec47d | 151 | acpi_status status; |
1da177e4 | 152 | |
2feec47d | 153 | /* One argument, sleep_state */ |
1da177e4 LT |
154 | |
155 | arg_list.count = 1; | |
156 | arg_list.pointer = &arg; | |
1da177e4 LT |
157 | arg.type = ACPI_TYPE_INTEGER; |
158 | arg.integer.value = sleep_state; | |
159 | ||
2feec47d | 160 | status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL); |
4be44fcd | 161 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
2feec47d BM |
162 | ACPI_EXCEPTION((AE_INFO, status, |
163 | "While executing method _WAK")); | |
1da177e4 | 164 | } |
2feec47d BM |
165 | /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */ |
166 | } | |
1da177e4 | 167 | |
2feec47d BM |
168 | /******************************************************************************* |
169 | * | |
170 | * FUNCTION: acpi_hw_execute_SST | |
171 | * | |
172 | * PARAMETERS: indicator_id - Value to be passed to the _SST method | |
173 | * | |
174 | * RETURN: None | |
175 | * | |
176 | * DESCRIPTION: Execute the optional _SST method (System Status) | |
177 | * | |
178 | ******************************************************************************/ | |
1da177e4 | 179 | |
2feec47d BM |
180 | void acpi_hw_execute_SST(u32 indicator_id) |
181 | { | |
182 | struct acpi_object_list arg_list; | |
183 | union acpi_object arg; | |
184 | acpi_status status; | |
1da177e4 | 185 | |
2feec47d | 186 | /* One argument, status indicator ID */ |
1da177e4 | 187 | |
2feec47d BM |
188 | arg_list.count = 1; |
189 | arg_list.pointer = &arg; | |
190 | arg.type = ACPI_TYPE_INTEGER; | |
1da177e4 | 191 | |
2feec47d | 192 | arg.integer.value = indicator_id; |
4be44fcd LB |
193 | status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); |
194 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
b8e4d893 BM |
195 | ACPI_EXCEPTION((AE_INFO, status, |
196 | "While executing method _SST")); | |
1da177e4 | 197 | } |
1da177e4 LT |
198 | } |
199 | ||
44f6c012 | 200 | /******************************************************************************* |
1da177e4 | 201 | * |
2feec47d | 202 | * FUNCTION: acpi_hw_legacy_sleep |
1da177e4 LT |
203 | * |
204 | * PARAMETERS: sleep_state - Which sleep state to enter | |
205 | * | |
206 | * RETURN: Status | |
207 | * | |
2feec47d | 208 | * DESCRIPTION: Enter a system sleep state via the legacy FADT PM registers |
1da177e4 LT |
209 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED |
210 | * | |
211 | ******************************************************************************/ | |
2feec47d BM |
212 | |
213 | acpi_status acpi_hw_legacy_sleep(u8 sleep_state) | |
1da177e4 | 214 | { |
4be44fcd LB |
215 | struct acpi_bit_register_info *sleep_type_reg_info; |
216 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
2feec47d BM |
217 | u32 pm1a_control; |
218 | u32 pm1b_control; | |
4be44fcd LB |
219 | u32 in_value; |
220 | acpi_status status; | |
1da177e4 | 221 | |
2feec47d | 222 | ACPI_FUNCTION_TRACE(hw_legacy_sleep); |
1da177e4 | 223 | |
4be44fcd | 224 | sleep_type_reg_info = |
82d79b86 | 225 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE); |
4be44fcd LB |
226 | sleep_enable_reg_info = |
227 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
228 | |
229 | /* Clear wake status */ | |
230 | ||
768aaaf1 BM |
231 | status = |
232 | acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); | |
4be44fcd LB |
233 | if (ACPI_FAILURE(status)) { |
234 | return_ACPI_STATUS(status); | |
1da177e4 LT |
235 | } |
236 | ||
237 | /* Clear all fixed and general purpose status bits */ | |
238 | ||
d8c71b6d | 239 | status = acpi_hw_clear_acpi_status(); |
4be44fcd LB |
240 | if (ACPI_FAILURE(status)) { |
241 | return_ACPI_STATUS(status); | |
1da177e4 LT |
242 | } |
243 | ||
2feec47d BM |
244 | if (sleep_state != ACPI_STATE_S5) { |
245 | /* | |
246 | * Disable BM arbitration. This feature is contained within an | |
247 | * optional register (PM2 Control), so ignore a BAD_ADDRESS | |
248 | * exception. | |
249 | */ | |
250 | status = acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 1); | |
251 | if (ACPI_FAILURE(status) && (status != AE_BAD_ADDRESS)) { | |
252 | return_ACPI_STATUS(status); | |
253 | } | |
254 | } | |
255 | ||
1da177e4 | 256 | /* |
23b168d4 | 257 | * 1) Disable/Clear all GPEs |
1da177e4 LT |
258 | * 2) Enable all wakeup GPEs |
259 | */ | |
1d99967b AS |
260 | status = acpi_hw_disable_all_gpes(); |
261 | if (ACPI_FAILURE(status)) { | |
262 | return_ACPI_STATUS(status); | |
263 | } | |
1da177e4 LT |
264 | acpi_gbl_system_awake_and_running = FALSE; |
265 | ||
4be44fcd LB |
266 | status = acpi_hw_enable_all_wakeup_gpes(); |
267 | if (ACPI_FAILURE(status)) { | |
268 | return_ACPI_STATUS(status); | |
1da177e4 LT |
269 | } |
270 | ||
2feec47d | 271 | /* Execute the _GTS method (Going To Sleep) */ |
c95d47a8 | 272 | |
2feec47d | 273 | acpi_hw_execute_GTS(sleep_state); |
c95d47a8 | 274 | |
1da177e4 LT |
275 | /* Get current value of PM1A control */ |
276 | ||
32c9ef99 BM |
277 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, |
278 | &pm1a_control); | |
4be44fcd LB |
279 | if (ACPI_FAILURE(status)) { |
280 | return_ACPI_STATUS(status); | |
1da177e4 | 281 | } |
4be44fcd | 282 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
b27d6597 | 283 | "Entering sleep state [S%u]\n", sleep_state)); |
1da177e4 | 284 | |
32c9ef99 | 285 | /* Clear the SLP_EN and SLP_TYP fields */ |
1da177e4 | 286 | |
32c9ef99 BM |
287 | pm1a_control &= ~(sleep_type_reg_info->access_bit_mask | |
288 | sleep_enable_reg_info->access_bit_mask); | |
289 | pm1b_control = pm1a_control; | |
1da177e4 | 290 | |
32c9ef99 | 291 | /* Insert the SLP_TYP bits */ |
1da177e4 | 292 | |
32c9ef99 | 293 | pm1a_control |= |
4be44fcd | 294 | (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); |
32c9ef99 | 295 | pm1b_control |= |
4be44fcd | 296 | (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position); |
1da177e4 LT |
297 | |
298 | /* | |
299 | * We split the writes of SLP_TYP and SLP_EN to workaround | |
300 | * poorly implemented hardware. | |
301 | */ | |
302 | ||
32c9ef99 | 303 | /* Write #1: write the SLP_TYP data to the PM1 Control registers */ |
1da177e4 | 304 | |
32c9ef99 | 305 | status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); |
4be44fcd LB |
306 | if (ACPI_FAILURE(status)) { |
307 | return_ACPI_STATUS(status); | |
1da177e4 LT |
308 | } |
309 | ||
32c9ef99 | 310 | /* Insert the sleep enable (SLP_EN) bit */ |
1da177e4 | 311 | |
32c9ef99 BM |
312 | pm1a_control |= sleep_enable_reg_info->access_bit_mask; |
313 | pm1b_control |= sleep_enable_reg_info->access_bit_mask; | |
1da177e4 | 314 | |
32c9ef99 | 315 | /* Flush caches, as per ACPI specification */ |
1da177e4 | 316 | |
4be44fcd | 317 | ACPI_FLUSH_CPU_CACHE(); |
1da177e4 | 318 | |
86886e55 JC |
319 | tboot_sleep(sleep_state, pm1a_control, pm1b_control); |
320 | ||
32c9ef99 | 321 | /* Write #2: Write both SLP_TYP + SLP_EN */ |
1da177e4 | 322 | |
32c9ef99 | 323 | status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); |
4be44fcd LB |
324 | if (ACPI_FAILURE(status)) { |
325 | return_ACPI_STATUS(status); | |
1da177e4 LT |
326 | } |
327 | ||
328 | if (sleep_state > ACPI_STATE_S3) { | |
329 | /* | |
44f6c012 RM |
330 | * We wanted to sleep > S3, but it didn't happen (by virtue of the |
331 | * fact that we are still executing!) | |
1da177e4 | 332 | * |
44f6c012 RM |
333 | * Wait ten seconds, then try again. This is to get S4/S5 to work on |
334 | * all machines. | |
1da177e4 | 335 | * |
d4913dc6 BM |
336 | * We wait so long to allow chipsets that poll this reg very slowly |
337 | * to still read the right value. Ideally, this block would go | |
1da177e4 LT |
338 | * away entirely. |
339 | */ | |
4be44fcd LB |
340 | acpi_os_stall(10000000); |
341 | ||
d30dc9ab | 342 | status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL, |
4be44fcd LB |
343 | sleep_enable_reg_info-> |
344 | access_bit_mask); | |
345 | if (ACPI_FAILURE(status)) { | |
346 | return_ACPI_STATUS(status); | |
1da177e4 LT |
347 | } |
348 | } | |
349 | ||
2feec47d | 350 | /* Wait for transition back to Working State */ |
1da177e4 LT |
351 | |
352 | do { | |
50ffba1b BM |
353 | status = |
354 | acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value); | |
4be44fcd LB |
355 | if (ACPI_FAILURE(status)) { |
356 | return_ACPI_STATUS(status); | |
1da177e4 | 357 | } |
2feec47d | 358 | |
1da177e4 LT |
359 | } while (!in_value); |
360 | ||
4be44fcd | 361 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 362 | } |
1da177e4 | 363 | |
44f6c012 | 364 | /******************************************************************************* |
1da177e4 | 365 | * |
2feec47d | 366 | * FUNCTION: acpi_hw_legacy_wake_prep |
1da177e4 | 367 | * |
2feec47d | 368 | * PARAMETERS: sleep_state - Which sleep state we just exited |
1da177e4 LT |
369 | * |
370 | * RETURN: Status | |
371 | * | |
c95d47a8 RW |
372 | * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a |
373 | * sleep. | |
2feec47d | 374 | * Called with interrupts ENABLED. |
1da177e4 LT |
375 | * |
376 | ******************************************************************************/ | |
2feec47d BM |
377 | |
378 | acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state) | |
1da177e4 | 379 | { |
4be44fcd LB |
380 | acpi_status status; |
381 | struct acpi_bit_register_info *sleep_type_reg_info; | |
382 | struct acpi_bit_register_info *sleep_enable_reg_info; | |
32c9ef99 BM |
383 | u32 pm1a_control; |
384 | u32 pm1b_control; | |
1da177e4 | 385 | |
2feec47d | 386 | ACPI_FUNCTION_TRACE(hw_legacy_wake_prep); |
1da177e4 LT |
387 | |
388 | /* | |
389 | * Set SLP_TYPE and SLP_EN to state S0. | |
390 | * This is unclear from the ACPI Spec, but it is required | |
391 | * by some machines. | |
392 | */ | |
4be44fcd LB |
393 | status = acpi_get_sleep_type_data(ACPI_STATE_S0, |
394 | &acpi_gbl_sleep_type_a, | |
395 | &acpi_gbl_sleep_type_b); | |
396 | if (ACPI_SUCCESS(status)) { | |
397 | sleep_type_reg_info = | |
82d79b86 | 398 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE); |
4be44fcd LB |
399 | sleep_enable_reg_info = |
400 | acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); | |
1da177e4 LT |
401 | |
402 | /* Get current value of PM1A control */ | |
403 | ||
d30dc9ab | 404 | status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, |
32c9ef99 | 405 | &pm1a_control); |
4be44fcd | 406 | if (ACPI_SUCCESS(status)) { |
52fc0b02 | 407 | |
32c9ef99 | 408 | /* Clear the SLP_EN and SLP_TYP fields */ |
1da177e4 | 409 | |
32c9ef99 BM |
410 | pm1a_control &= ~(sleep_type_reg_info->access_bit_mask | |
411 | sleep_enable_reg_info-> | |
412 | access_bit_mask); | |
413 | pm1b_control = pm1a_control; | |
1da177e4 | 414 | |
32c9ef99 | 415 | /* Insert the SLP_TYP bits */ |
1da177e4 | 416 | |
d4913dc6 BM |
417 | pm1a_control |= (acpi_gbl_sleep_type_a << |
418 | sleep_type_reg_info->bit_position); | |
419 | pm1b_control |= (acpi_gbl_sleep_type_b << | |
420 | sleep_type_reg_info->bit_position); | |
1da177e4 | 421 | |
32c9ef99 | 422 | /* Write the control registers and ignore any errors */ |
1da177e4 | 423 | |
32c9ef99 BM |
424 | (void)acpi_hw_write_pm1_control(pm1a_control, |
425 | pm1b_control); | |
1da177e4 LT |
426 | } |
427 | } | |
428 | ||
2feec47d | 429 | acpi_hw_execute_BFS(sleep_state); |
c95d47a8 RW |
430 | return_ACPI_STATUS(status); |
431 | } | |
432 | ||
433 | /******************************************************************************* | |
434 | * | |
2feec47d | 435 | * FUNCTION: acpi_hw_legacy_wake |
c95d47a8 RW |
436 | * |
437 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
438 | * | |
439 | * RETURN: Status | |
440 | * | |
441 | * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep | |
442 | * Called with interrupts ENABLED. | |
443 | * | |
444 | ******************************************************************************/ | |
2feec47d BM |
445 | |
446 | acpi_status acpi_hw_legacy_wake(u8 sleep_state) | |
c95d47a8 | 447 | { |
c95d47a8 RW |
448 | acpi_status status; |
449 | ||
2feec47d | 450 | ACPI_FUNCTION_TRACE(hw_legacy_wake); |
c95d47a8 | 451 | |
1da177e4 LT |
452 | /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ |
453 | ||
454 | acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; | |
2feec47d | 455 | acpi_hw_execute_SST(ACPI_SST_WAKING); |
1da177e4 | 456 | |
1da177e4 | 457 | /* |
79d2dfaa TR |
458 | * GPEs must be enabled before _WAK is called as GPEs |
459 | * might get fired there | |
460 | * | |
1da177e4 LT |
461 | * Restore the GPEs: |
462 | * 1) Disable/Clear all GPEs | |
463 | * 2) Enable all runtime GPEs | |
464 | */ | |
4be44fcd LB |
465 | status = acpi_hw_disable_all_gpes(); |
466 | if (ACPI_FAILURE(status)) { | |
467 | return_ACPI_STATUS(status); | |
1da177e4 | 468 | } |
2feec47d | 469 | |
4be44fcd LB |
470 | status = acpi_hw_enable_all_runtime_gpes(); |
471 | if (ACPI_FAILURE(status)) { | |
472 | return_ACPI_STATUS(status); | |
1da177e4 LT |
473 | } |
474 | ||
2feec47d BM |
475 | /* |
476 | * Now we can execute _WAK, etc. Some machines require that the GPEs | |
477 | * are enabled before the wake methods are executed. | |
478 | */ | |
479 | acpi_hw_execute_WAK(sleep_state); | |
79d2dfaa | 480 | |
a68823ee | 481 | /* |
2feec47d BM |
482 | * Some BIOS code assumes that WAK_STS will be cleared on resume |
483 | * and use it to determine whether the system is rebooting or | |
484 | * resuming. Clear WAK_STS for compatibility. | |
a68823ee | 485 | */ |
50ffba1b | 486 | acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, 1); |
79d2dfaa TR |
487 | acpi_gbl_system_awake_and_running = TRUE; |
488 | ||
1da177e4 LT |
489 | /* Enable power button */ |
490 | ||
4be44fcd | 491 | (void) |
50ffba1b | 492 | acpi_write_bit_register(acpi_gbl_fixed_event_info |
2feec47d BM |
493 | [ACPI_EVENT_POWER_BUTTON]. |
494 | enable_register_id, ACPI_ENABLE_EVENT); | |
44f6c012 | 495 | |
4be44fcd | 496 | (void) |
50ffba1b | 497 | acpi_write_bit_register(acpi_gbl_fixed_event_info |
2feec47d BM |
498 | [ACPI_EVENT_POWER_BUTTON]. |
499 | status_register_id, ACPI_CLEAR_STATUS); | |
1da177e4 | 500 | |
2feec47d BM |
501 | /* |
502 | * Enable BM arbitration. This feature is contained within an | |
503 | * optional register (PM2 Control), so ignore a BAD_ADDRESS | |
504 | * exception. | |
505 | */ | |
506 | status = acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 0); | |
507 | if (ACPI_FAILURE(status) && (status != AE_BAD_ADDRESS)) { | |
508 | return_ACPI_STATUS(status); | |
1da177e4 LT |
509 | } |
510 | ||
2feec47d | 511 | acpi_hw_execute_SST(ACPI_SST_WORKING); |
4be44fcd | 512 | return_ACPI_STATUS(status); |
1da177e4 | 513 | } |
8313524a | 514 | |
2feec47d BM |
515 | |
516 | /******************************************************************************* | |
517 | * | |
518 | * FUNCTION: acpi_hw_extended_sleep | |
519 | * | |
520 | * PARAMETERS: sleep_state - Which sleep state to enter | |
521 | * | |
522 | * RETURN: Status | |
523 | * | |
524 | * DESCRIPTION: Enter a system sleep state via the extended FADT sleep | |
525 | * registers (V5 FADT). | |
526 | * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED | |
527 | * | |
528 | ******************************************************************************/ | |
529 | ||
530 | acpi_status acpi_hw_extended_sleep(u8 sleep_state) | |
531 | { | |
532 | acpi_status status; | |
533 | u8 sleep_type_value; | |
534 | u64 sleep_status; | |
535 | ||
536 | ACPI_FUNCTION_TRACE(hw_extended_sleep); | |
537 | ||
538 | /* Extended sleep registers must be valid */ | |
539 | ||
540 | if (!acpi_gbl_FADT.sleep_control.address || | |
541 | !acpi_gbl_FADT.sleep_status.address) { | |
542 | return_ACPI_STATUS(AE_NOT_EXIST); | |
543 | } | |
544 | ||
545 | /* Clear wake status (WAK_STS) */ | |
546 | ||
547 | status = acpi_write(ACPI_X_WAKE_STATUS, &acpi_gbl_FADT.sleep_status); | |
548 | if (ACPI_FAILURE(status)) { | |
549 | return_ACPI_STATUS(status); | |
550 | } | |
551 | ||
552 | acpi_gbl_system_awake_and_running = FALSE; | |
553 | ||
554 | /* Execute the _GTS method (Going To Sleep) */ | |
555 | ||
556 | acpi_hw_execute_GTS(sleep_state); | |
557 | ||
558 | /* Flush caches, as per ACPI specification */ | |
559 | ||
560 | ACPI_FLUSH_CPU_CACHE(); | |
561 | ||
562 | /* | |
563 | * Set the SLP_TYP and SLP_EN bits. | |
564 | * | |
565 | * Note: We only use the first value returned by the \_Sx method | |
566 | * (acpi_gbl_sleep_type_a) - As per ACPI specification. | |
567 | */ | |
568 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, | |
569 | "Entering sleep state [S%u]\n", sleep_state)); | |
570 | ||
571 | sleep_type_value = | |
572 | ((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) & | |
573 | ACPI_X_SLEEP_TYPE_MASK); | |
574 | ||
575 | status = acpi_write((sleep_type_value | ACPI_X_SLEEP_ENABLE), | |
576 | &acpi_gbl_FADT.sleep_control); | |
577 | if (ACPI_FAILURE(status)) { | |
578 | return_ACPI_STATUS(status); | |
579 | } | |
580 | ||
581 | /* Wait for transition back to Working State */ | |
582 | ||
583 | do { | |
584 | status = acpi_read(&sleep_status, &acpi_gbl_FADT.sleep_status); | |
585 | if (ACPI_FAILURE(status)) { | |
586 | return_ACPI_STATUS(status); | |
587 | } | |
588 | ||
589 | } while (!(((u8)sleep_status) & ACPI_X_WAKE_STATUS)); | |
590 | ||
591 | return_ACPI_STATUS(AE_OK); | |
592 | } | |
593 | ||
594 | /******************************************************************************* | |
595 | * | |
596 | * FUNCTION: acpi_hw_extended_wake_prep | |
597 | * | |
598 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
599 | * | |
600 | * RETURN: Status | |
601 | * | |
602 | * DESCRIPTION: Perform first part of OS-independent ACPI cleanup after | |
603 | * a sleep. Called with interrupts ENABLED. | |
604 | * | |
605 | ******************************************************************************/ | |
606 | ||
607 | acpi_status acpi_hw_extended_wake_prep(u8 sleep_state) | |
608 | { | |
609 | acpi_status status; | |
610 | u8 sleep_type_value; | |
611 | ||
612 | ACPI_FUNCTION_TRACE(hw_extended_wake_prep); | |
613 | ||
614 | status = acpi_get_sleep_type_data(ACPI_STATE_S0, | |
615 | &acpi_gbl_sleep_type_a, | |
616 | &acpi_gbl_sleep_type_b); | |
617 | if (ACPI_SUCCESS(status)) { | |
618 | sleep_type_value = | |
619 | ((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) & | |
620 | ACPI_X_SLEEP_TYPE_MASK); | |
621 | ||
622 | (void)acpi_write((sleep_type_value | ACPI_X_SLEEP_ENABLE), | |
623 | &acpi_gbl_FADT.sleep_control); | |
624 | } | |
625 | ||
626 | acpi_hw_execute_BFS(sleep_state); | |
627 | return_ACPI_STATUS(AE_OK); | |
628 | } | |
629 | ||
630 | /******************************************************************************* | |
631 | * | |
632 | * FUNCTION: acpi_hw_extended_wake | |
633 | * | |
634 | * PARAMETERS: sleep_state - Which sleep state we just exited | |
635 | * | |
636 | * RETURN: Status | |
637 | * | |
638 | * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep | |
639 | * Called with interrupts ENABLED. | |
640 | * | |
641 | ******************************************************************************/ | |
642 | ||
643 | acpi_status acpi_hw_extended_wake(u8 sleep_state) | |
644 | { | |
645 | ACPI_FUNCTION_TRACE(hw_extended_wake); | |
646 | ||
647 | /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ | |
648 | ||
649 | acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; | |
650 | ||
651 | /* Execute the wake methods */ | |
652 | ||
653 | acpi_hw_execute_SST(ACPI_SST_WAKING); | |
654 | acpi_hw_execute_WAK(sleep_state); | |
655 | ||
656 | /* | |
657 | * Some BIOS code assumes that WAK_STS will be cleared on resume | |
658 | * and use it to determine whether the system is rebooting or | |
659 | * resuming. Clear WAK_STS for compatibility. | |
660 | */ | |
661 | (void)acpi_write(ACPI_X_WAKE_STATUS, &acpi_gbl_FADT.sleep_status); | |
662 | acpi_gbl_system_awake_and_running = TRUE; | |
663 | ||
664 | acpi_hw_execute_SST(ACPI_SST_WORKING); | |
665 | return_ACPI_STATUS(AE_OK); | |
666 | } |