blob: 6faa76bdc3d51cb769035aa8ef01f7a672c45cec [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001
2/******************************************************************************
3 *
4 * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
5 *
6 *****************************************************************************/
7
8/*
Bob Moore4a90c7e2006-01-13 16:22:00 -05009 * Copyright (C) 2000 - 2006, R. Byron Moore
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <acpi/acpi.h>
Bob Mooref3d2e782007-02-02 19:48:18 +030046#include <acpi/actables.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48#define _COMPONENT ACPI_HARDWARE
Len Brown4be44fc2005-08-05 00:44:28 -040049ACPI_MODULE_NAME("hwsleep")
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Robert Moore44f6c012005-04-18 22:49:35 -040051/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 *
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 *
Robert Moore44f6c012005-04-18 22:49:35 -040060 * DESCRIPTION: Access function for the firmware_waking_vector field in FACS
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 *
62 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -070063acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -040064acpi_set_firmware_waking_vector(acpi_physical_address physical_address)
Linus Torvalds1da177e2005-04-16 15:20:36 -070065{
Bob Mooref3d2e782007-02-02 19:48:18 +030066 struct acpi_table_facs *facs;
67 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Bob Mooreb229cf92006-04-21 17:15:00 -040069 ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Bob Mooref3d2e782007-02-02 19:48:18 +030071 /* 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 /* Set the vector */
81
Bob Mooref3d2e782007-02-02 19:48:18 +030082 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;
Len Brown4be44fc2005-08-05 00:44:28 -040087 } else {
Bob Mooref3d2e782007-02-02 19:48:18 +030088 /*
89 * ACPI 2.0 FACS with valid X_ field
90 */
91 facs->xfirmware_waking_vector = physical_address;
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 }
93
Len Brown4be44fc2005-08-05 00:44:28 -040094 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -070095}
96
Bob Moore83135242006-10-03 00:00:00 -040097ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
98
Robert Moore44f6c012005-04-18 22:49:35 -040099/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 *
101 * FUNCTION: acpi_get_firmware_waking_vector
102 *
Robert Moore44f6c012005-04-18 22:49:35 -0400103 * PARAMETERS: *physical_address - Where the contents of
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 * the firmware_waking_vector field of
Robert Moore44f6c012005-04-18 22:49:35 -0400105 * the FACS will be returned.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 *
Robert Moore44f6c012005-04-18 22:49:35 -0400107 * RETURN: Status, vector
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 *
Robert Moore44f6c012005-04-18 22:49:35 -0400109 * DESCRIPTION: Access function for the firmware_waking_vector field in FACS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 *
111 ******************************************************************************/
112#ifdef ACPI_FUTURE_USAGE
113acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400114acpi_get_firmware_waking_vector(acpi_physical_address * physical_address)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115{
Bob Mooref3d2e782007-02-02 19:48:18 +0300116 struct acpi_table_facs *facs;
117 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
Bob Mooreb229cf92006-04-21 17:15:00 -0400119 ACPI_FUNCTION_TRACE(acpi_get_firmware_waking_vector);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
121 if (!physical_address) {
Len Brown4be44fc2005-08-05 00:44:28 -0400122 return_ACPI_STATUS(AE_BAD_PARAMETER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 }
124
Bob Mooref3d2e782007-02-02 19:48:18 +0300125 /* 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 /* Get the vector */
135
Bob Mooref3d2e782007-02-02 19:48:18 +0300136 if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) {
137 /*
138 * ACPI 1.0 FACS or short table or optional X_ field is zero
139 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 *physical_address =
Bob Mooref3d2e782007-02-02 19:48:18 +0300141 (acpi_physical_address) facs->firmware_waking_vector;
142 } else {
143 /*
144 * ACPI 2.0 FACS with valid X_ field
145 */
146 *physical_address =
147 (acpi_physical_address) facs->xfirmware_waking_vector;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 }
149
Len Brown4be44fc2005-08-05 00:44:28 -0400150 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151}
Bob Moore83135242006-10-03 00:00:00 -0400152
153ACPI_EXPORT_SYMBOL(acpi_get_firmware_waking_vector)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154#endif
155
Robert Moore44f6c012005-04-18 22:49:35 -0400156/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 *
158 * FUNCTION: acpi_enter_sleep_state_prep
159 *
160 * PARAMETERS: sleep_state - Which sleep state to enter
161 *
162 * RETURN: Status
163 *
164 * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
165 * This function must execute with interrupts enabled.
166 * We break sleeping into 2 stages so that OSPM can handle
167 * various OS-specific tasks between the two steps.
168 *
169 ******************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -0400170acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171{
Len Brown4be44fc2005-08-05 00:44:28 -0400172 acpi_status status;
173 struct acpi_object_list arg_list;
174 union acpi_object arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
Bob Mooreb229cf92006-04-21 17:15:00 -0400176 ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
178 /*
179 * _PSW methods could be run here to enable wake-on keyboard, LAN, etc.
180 */
Len Brown4be44fc2005-08-05 00:44:28 -0400181 status = acpi_get_sleep_type_data(sleep_state,
182 &acpi_gbl_sleep_type_a,
183 &acpi_gbl_sleep_type_b);
184 if (ACPI_FAILURE(status)) {
185 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 }
187
188 /* Setup parameter object */
189
190 arg_list.count = 1;
191 arg_list.pointer = &arg;
192
193 arg.type = ACPI_TYPE_INTEGER;
194 arg.integer.value = sleep_state;
195
196 /* Run the _PTS and _GTS methods */
197
Len Brown4be44fc2005-08-05 00:44:28 -0400198 status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL);
199 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
200 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 }
202
Len Brown4be44fc2005-08-05 00:44:28 -0400203 status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
204 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
205 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 }
207
208 /* Setup the argument to _SST */
209
210 switch (sleep_state) {
211 case ACPI_STATE_S0:
212 arg.integer.value = ACPI_SST_WORKING;
213 break;
214
215 case ACPI_STATE_S1:
216 case ACPI_STATE_S2:
217 case ACPI_STATE_S3:
218 arg.integer.value = ACPI_SST_SLEEPING;
219 break;
220
221 case ACPI_STATE_S4:
222 arg.integer.value = ACPI_SST_SLEEP_CONTEXT;
223 break;
224
225 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400226 arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 break;
228 }
229
230 /* Set the system indicators to show the desired sleep state. */
231
Len Brown4be44fc2005-08-05 00:44:28 -0400232 status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
233 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500234 ACPI_EXCEPTION((AE_INFO, status,
235 "While executing method _SST"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 }
237
Len Brown4be44fc2005-08-05 00:44:28 -0400238 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239}
240
Bob Moore83135242006-10-03 00:00:00 -0400241ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
242
Robert Moore44f6c012005-04-18 22:49:35 -0400243/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 *
245 * FUNCTION: acpi_enter_sleep_state
246 *
247 * PARAMETERS: sleep_state - Which sleep state to enter
248 *
249 * RETURN: Status
250 *
251 * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
252 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
253 *
254 ******************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -0400255acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256{
Len Brown4be44fc2005-08-05 00:44:28 -0400257 u32 PM1Acontrol;
258 u32 PM1Bcontrol;
259 struct acpi_bit_register_info *sleep_type_reg_info;
260 struct acpi_bit_register_info *sleep_enable_reg_info;
261 u32 in_value;
262 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
Bob Mooreb229cf92006-04-21 17:15:00 -0400264 ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265
266 if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
Len Brown4be44fc2005-08-05 00:44:28 -0400267 (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500268 ACPI_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X",
269 acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
Len Brown4be44fc2005-08-05 00:44:28 -0400270 return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 }
272
Len Brown4be44fc2005-08-05 00:44:28 -0400273 sleep_type_reg_info =
274 acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A);
275 sleep_enable_reg_info =
276 acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
278 /* Clear wake status */
279
Len Brown4be44fc2005-08-05 00:44:28 -0400280 status =
281 acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK);
282 if (ACPI_FAILURE(status)) {
283 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 }
285
286 /* Clear all fixed and general purpose status bits */
287
Len Brown4be44fc2005-08-05 00:44:28 -0400288 status = acpi_hw_clear_acpi_status(ACPI_MTX_DO_NOT_LOCK);
289 if (ACPI_FAILURE(status)) {
290 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 }
292
293 /*
294 * 1) Disable/Clear all GPEs
295 * 2) Enable all wakeup GPEs
296 */
Len Brown4be44fc2005-08-05 00:44:28 -0400297 status = acpi_hw_disable_all_gpes();
298 if (ACPI_FAILURE(status)) {
299 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 }
301 acpi_gbl_system_awake_and_running = FALSE;
302
Len Brown4be44fc2005-08-05 00:44:28 -0400303 status = acpi_hw_enable_all_wakeup_gpes();
304 if (ACPI_FAILURE(status)) {
305 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 }
307
308 /* Get current value of PM1A control */
309
Len Brown4be44fc2005-08-05 00:44:28 -0400310 status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
311 ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
312 if (ACPI_FAILURE(status)) {
313 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 }
Len Brown4be44fc2005-08-05 00:44:28 -0400315 ACPI_DEBUG_PRINT((ACPI_DB_INIT,
316 "Entering sleep state [S%d]\n", sleep_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317
318 /* Clear SLP_EN and SLP_TYP fields */
319
Robert Moore44f6c012005-04-18 22:49:35 -0400320 PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
Len Brown4be44fc2005-08-05 00:44:28 -0400321 sleep_enable_reg_info->access_bit_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 PM1Bcontrol = PM1Acontrol;
323
324 /* Insert SLP_TYP bits */
325
Len Brown4be44fc2005-08-05 00:44:28 -0400326 PM1Acontrol |=
327 (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
328 PM1Bcontrol |=
329 (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
331 /*
332 * We split the writes of SLP_TYP and SLP_EN to workaround
333 * poorly implemented hardware.
334 */
335
336 /* Write #1: fill in SLP_TYP data */
337
Len Brown4be44fc2005-08-05 00:44:28 -0400338 status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
339 ACPI_REGISTER_PM1A_CONTROL,
340 PM1Acontrol);
341 if (ACPI_FAILURE(status)) {
342 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 }
344
Len Brown4be44fc2005-08-05 00:44:28 -0400345 status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
346 ACPI_REGISTER_PM1B_CONTROL,
347 PM1Bcontrol);
348 if (ACPI_FAILURE(status)) {
349 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 }
351
352 /* Insert SLP_ENABLE bit */
353
354 PM1Acontrol |= sleep_enable_reg_info->access_bit_mask;
355 PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask;
356
357 /* Write #2: SLP_TYP + SLP_EN */
358
Len Brown4be44fc2005-08-05 00:44:28 -0400359 ACPI_FLUSH_CPU_CACHE();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
Len Brown4be44fc2005-08-05 00:44:28 -0400361 status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
362 ACPI_REGISTER_PM1A_CONTROL,
363 PM1Acontrol);
364 if (ACPI_FAILURE(status)) {
365 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 }
367
Len Brown4be44fc2005-08-05 00:44:28 -0400368 status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
369 ACPI_REGISTER_PM1B_CONTROL,
370 PM1Bcontrol);
371 if (ACPI_FAILURE(status)) {
372 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 }
374
375 if (sleep_state > ACPI_STATE_S3) {
376 /*
Robert Moore44f6c012005-04-18 22:49:35 -0400377 * We wanted to sleep > S3, but it didn't happen (by virtue of the
378 * fact that we are still executing!)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 *
Robert Moore44f6c012005-04-18 22:49:35 -0400380 * Wait ten seconds, then try again. This is to get S4/S5 to work on
381 * all machines.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 *
383 * We wait so long to allow chipsets that poll this reg very slowly to
384 * still read the right value. Ideally, this block would go
385 * away entirely.
386 */
Len Brown4be44fc2005-08-05 00:44:28 -0400387 acpi_os_stall(10000000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Len Brown4be44fc2005-08-05 00:44:28 -0400389 status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
390 ACPI_REGISTER_PM1_CONTROL,
391 sleep_enable_reg_info->
392 access_bit_mask);
393 if (ACPI_FAILURE(status)) {
394 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 }
396 }
397
398 /* Wait until we enter sleep state */
399
400 do {
Len Brown4be44fc2005-08-05 00:44:28 -0400401 status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value,
402 ACPI_MTX_DO_NOT_LOCK);
403 if (ACPI_FAILURE(status)) {
404 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 }
406
407 /* Spin until we wake */
408
409 } while (!in_value);
410
Len Brown4be44fc2005-08-05 00:44:28 -0400411 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
Bob Moore83135242006-10-03 00:00:00 -0400414ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
Robert Moore44f6c012005-04-18 22:49:35 -0400416/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 *
418 * FUNCTION: acpi_enter_sleep_state_s4bios
419 *
420 * PARAMETERS: None
421 *
422 * RETURN: Status
423 *
424 * DESCRIPTION: Perform a S4 bios request.
425 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
426 *
427 ******************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -0400428acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429{
Len Brown4be44fc2005-08-05 00:44:28 -0400430 u32 in_value;
431 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432
Bob Mooreb229cf92006-04-21 17:15:00 -0400433 ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
Len Brown4be44fc2005-08-05 00:44:28 -0400435 status =
436 acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_DO_NOT_LOCK);
437 if (ACPI_FAILURE(status)) {
438 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 }
440
Len Brown4be44fc2005-08-05 00:44:28 -0400441 status = acpi_hw_clear_acpi_status(ACPI_MTX_DO_NOT_LOCK);
442 if (ACPI_FAILURE(status)) {
443 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 }
445
446 /*
447 * 1) Disable/Clear all GPEs
448 * 2) Enable all wakeup GPEs
449 */
Len Brown4be44fc2005-08-05 00:44:28 -0400450 status = acpi_hw_disable_all_gpes();
451 if (ACPI_FAILURE(status)) {
452 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 }
454 acpi_gbl_system_awake_and_running = FALSE;
455
Len Brown4be44fc2005-08-05 00:44:28 -0400456 status = acpi_hw_enable_all_wakeup_gpes();
457 if (ACPI_FAILURE(status)) {
458 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 }
460
Len Brown4be44fc2005-08-05 00:44:28 -0400461 ACPI_FLUSH_CPU_CACHE();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462
Bob Mooref3d2e782007-02-02 19:48:18 +0300463 status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
464 (u32) acpi_gbl_FADT.S4bios_request, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
466 do {
467 acpi_os_stall(1000);
Len Brown4be44fc2005-08-05 00:44:28 -0400468 status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value,
469 ACPI_MTX_DO_NOT_LOCK);
470 if (ACPI_FAILURE(status)) {
471 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 }
473 } while (!in_value);
474
Len Brown4be44fc2005-08-05 00:44:28 -0400475 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Bob Moore83135242006-10-03 00:00:00 -0400478ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
Robert Moore44f6c012005-04-18 22:49:35 -0400480/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 *
482 * FUNCTION: acpi_leave_sleep_state
483 *
484 * PARAMETERS: sleep_state - Which sleep state we just exited
485 *
486 * RETURN: Status
487 *
488 * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
489 * Called with interrupts ENABLED.
490 *
491 ******************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -0400492acpi_status acpi_leave_sleep_state(u8 sleep_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493{
Len Brown4be44fc2005-08-05 00:44:28 -0400494 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501
Bob Mooreb229cf92006-04-21 17:15:00 -0400502 ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503
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 */
Len Brown4be44fc2005-08-05 00:44:28 -0400509 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
518 /* Get current value of PM1A control */
519
Len Brown4be44fc2005-08-05 00:44:28 -0400520 status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK,
521 ACPI_REGISTER_PM1_CONTROL,
522 &PM1Acontrol);
523 if (ACPI_SUCCESS(status)) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400524
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 /* Clear SLP_EN and SLP_TYP fields */
526
527 PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
Len Brown4be44fc2005-08-05 00:44:28 -0400528 sleep_enable_reg_info->
529 access_bit_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 PM1Bcontrol = PM1Acontrol;
531
532 /* Insert SLP_TYP bits */
533
Len Brown4be44fc2005-08-05 00:44:28 -0400534 PM1Acontrol |=
535 (acpi_gbl_sleep_type_a << sleep_type_reg_info->
536 bit_position);
537 PM1Bcontrol |=
538 (acpi_gbl_sleep_type_b << sleep_type_reg_info->
539 bit_position);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
541 /* Just ignore any errors */
542
Len Brown4be44fc2005-08-05 00:44:28 -0400543 (void)acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
544 ACPI_REGISTER_PM1A_CONTROL,
545 PM1Acontrol);
546 (void)acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
547 ACPI_REGISTER_PM1B_CONTROL,
548 PM1Bcontrol);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 }
550 }
551
552 /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
553
554 acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
555
556 /* Setup parameter object */
557
558 arg_list.count = 1;
559 arg_list.pointer = &arg;
560 arg.type = ACPI_TYPE_INTEGER;
561
562 /* Ignore any errors from these methods */
563
564 arg.integer.value = ACPI_SST_WAKING;
Len Brown4be44fc2005-08-05 00:44:28 -0400565 status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
566 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500567 ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 }
569
570 arg.integer.value = sleep_state;
Len Brown4be44fc2005-08-05 00:44:28 -0400571 status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
572 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500573 ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 }
575
Len Brown4be44fc2005-08-05 00:44:28 -0400576 status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL);
577 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500578 ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 }
580 /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
581
582 /*
583 * Restore the GPEs:
584 * 1) Disable/Clear all GPEs
585 * 2) Enable all runtime GPEs
586 */
Len Brown4be44fc2005-08-05 00:44:28 -0400587 status = acpi_hw_disable_all_gpes();
588 if (ACPI_FAILURE(status)) {
589 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 }
591 acpi_gbl_system_awake_and_running = TRUE;
592
Len Brown4be44fc2005-08-05 00:44:28 -0400593 status = acpi_hw_enable_all_runtime_gpes();
594 if (ACPI_FAILURE(status)) {
595 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 }
597
598 /* Enable power button */
599
Len Brown4be44fc2005-08-05 00:44:28 -0400600 (void)
601 acpi_set_register(acpi_gbl_fixed_event_info
602 [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1,
603 ACPI_MTX_DO_NOT_LOCK);
Robert Moore44f6c012005-04-18 22:49:35 -0400604
Len Brown4be44fc2005-08-05 00:44:28 -0400605 (void)
606 acpi_set_register(acpi_gbl_fixed_event_info
607 [ACPI_EVENT_POWER_BUTTON].status_register_id, 1,
608 ACPI_MTX_DO_NOT_LOCK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609
610 arg.integer.value = ACPI_SST_WORKING;
Len Brown4be44fc2005-08-05 00:44:28 -0400611 status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
612 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500613 ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 }
615
Len Brown4be44fc2005-08-05 00:44:28 -0400616 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617}
Bob Moore83135242006-10-03 00:00:00 -0400618
619ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)