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authorBob Moore <robert.moore@intel.com>2012-02-14 02:00:53 -0500
committerLen Brown <len.brown@intel.com>2012-03-22 01:44:34 -0400
commit2feec47d4c5f80b05f1650f5a24865718978eea4 (patch)
tree71fc838990113004d07186997efd83875af3a3d8 /drivers/acpi/acpica
parent384fe875efdc99f367a58920acb89c63f7465479 (diff)
ACPICA: ACPI 5: Support for new FADT SleepStatus, SleepControl registers
Adds sleep and wake support for systems with these registers. One new file, hwxfsleep.c Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/acpica')
-rw-r--r--drivers/acpi/acpica/Makefile3
-rw-r--r--drivers/acpi/acpica/achware.h17
-rw-r--r--drivers/acpi/acpica/hwsleep.c566
-rw-r--r--drivers/acpi/acpica/hwxfsleep.c377
4 files changed, 694 insertions, 269 deletions
diff --git a/drivers/acpi/acpica/Makefile b/drivers/acpi/acpica/Makefile
index 0ca208b6dcf0..da5518063ef7 100644
--- a/drivers/acpi/acpica/Makefile
+++ b/drivers/acpi/acpica/Makefile
@@ -73,7 +73,8 @@ acpi-y += \
73 hwregs.o \ 73 hwregs.o \
74 hwsleep.o \ 74 hwsleep.o \
75 hwvalid.o \ 75 hwvalid.o \
76 hwxface.o 76 hwxface.o \
77 hwxfsleep.o
77 78
78acpi-$(ACPI_FUTURE_USAGE) += hwtimer.o 79acpi-$(ACPI_FUTURE_USAGE) += hwtimer.o
79 80
diff --git a/drivers/acpi/acpica/achware.h b/drivers/acpi/acpica/achware.h
index 677793e938f5..087f7106412d 100644
--- a/drivers/acpi/acpica/achware.h
+++ b/drivers/acpi/acpica/achware.h
@@ -81,6 +81,23 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value);
81acpi_status acpi_hw_clear_acpi_status(void); 81acpi_status acpi_hw_clear_acpi_status(void);
82 82
83/* 83/*
84 * hwsleep - sleep/wake support
85 */
86void acpi_hw_execute_SST(u32 value);
87
88acpi_status acpi_hw_extended_sleep(u8 sleep_state);
89
90acpi_status acpi_hw_legacy_sleep(u8 sleep_state);
91
92acpi_status acpi_hw_extended_wake_prep(u8 sleep_state);
93
94acpi_status acpi_hw_extended_wake(u8 sleep_state);
95
96acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state);
97
98acpi_status acpi_hw_legacy_wake(u8 sleep_state);
99
100/*
84 * hwvalid - Port I/O with validation 101 * hwvalid - Port I/O with validation
85 */ 102 */
86acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width); 103acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width);
diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c
index 3c4a922a9fc2..59a2a6b897d4 100644
--- a/drivers/acpi/acpica/hwsleep.c
+++ b/drivers/acpi/acpica/hwsleep.c
@@ -1,7 +1,6 @@
1
2/****************************************************************************** 1/******************************************************************************
3 * 2 *
4 * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface 3 * Name: hwsleep.c - ACPI Hardware Sleep/Wake Support Functions
5 * 4 *
6 *****************************************************************************/ 5 *****************************************************************************/
7 6
@@ -44,212 +43,183 @@
44 43
45#include <acpi/acpi.h> 44#include <acpi/acpi.h>
46#include "accommon.h" 45#include "accommon.h"
47#include "actables.h"
48#include <linux/tboot.h> 46#include <linux/tboot.h>
49#include <linux/module.h> 47#include <linux/module.h>
50 48
51#define _COMPONENT ACPI_HARDWARE 49#define _COMPONENT ACPI_HARDWARE
52ACPI_MODULE_NAME("hwsleep") 50ACPI_MODULE_NAME("hwsleep")
53 51
52/* Local prototypes */
53static void acpi_hw_execute_GTS(u8 sleep_state);
54
55static void acpi_hw_execute_BFS(u8 sleep_state);
56
57static void acpi_hw_execute_WAK(u8 sleep_state);
58
59static unsigned int gts, bfs;
60module_param(gts, uint, 0644);
61module_param(bfs, uint, 0644);
62MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
63MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
64
54/******************************************************************************* 65/*******************************************************************************
55 * 66 *
56 * FUNCTION: acpi_set_firmware_waking_vector 67 * FUNCTION: acpi_hw_execute_GTS
57 * 68 *
58 * PARAMETERS: physical_address - 32-bit physical address of ACPI real mode 69 * PARAMETERS: sleep_state - Sleep state that will be entered
59 * entry point.
60 * 70 *
61 * RETURN: Status 71 * RETURN: None
62 * 72 *
63 * DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS 73 * DESCRIPTION: Execute the optional _GTS method (Going To Sleep)
64 * 74 *
65 ******************************************************************************/ 75 ******************************************************************************/
66acpi_status
67acpi_set_firmware_waking_vector(u32 physical_address)
68{
69 ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
70
71 76
72 /* 77static void acpi_hw_execute_GTS(u8 sleep_state)
73 * According to the ACPI specification 2.0c and later, the 64-bit 78{
74 * waking vector should be cleared and the 32-bit waking vector should 79 struct acpi_object_list arg_list;
75 * be used, unless we want the wake-up code to be called by the BIOS in 80 union acpi_object arg;
76 * Protected Mode. Some systems (for example HP dv5-1004nr) are known 81 acpi_status status;
77 * to fail to resume if the 64-bit vector is used.
78 */
79 82
80 /* Set the 32-bit vector */ 83 if (!gts)
84 return;
81 85
82 acpi_gbl_FACS->firmware_waking_vector = physical_address; 86 /* One argument, sleep_state */
83 87
84 /* Clear the 64-bit vector if it exists */ 88 arg_list.count = 1;
89 arg_list.pointer = &arg;
90 arg.type = ACPI_TYPE_INTEGER;
91 arg.integer.value = sleep_state;
85 92
86 if ((acpi_gbl_FACS->length > 32) && (acpi_gbl_FACS->version >= 1)) { 93 status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
87 acpi_gbl_FACS->xfirmware_waking_vector = 0; 94 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
95 ACPI_EXCEPTION((AE_INFO, status,
96 "While executing method _GTS"));
88 } 97 }
89
90 return_ACPI_STATUS(AE_OK);
91} 98}
92 99
93ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
94
95#if ACPI_MACHINE_WIDTH == 64
96/******************************************************************************* 100/*******************************************************************************
97 * 101 *
98 * FUNCTION: acpi_set_firmware_waking_vector64 102 * FUNCTION: acpi_hw_execute_BFS
99 * 103 *
100 * PARAMETERS: physical_address - 64-bit physical address of ACPI protected 104 * PARAMETERS: sleep_state - Which sleep state we just exited
101 * mode entry point.
102 * 105 *
103 * RETURN: Status 106 * RETURN: None
104 * 107 *
105 * DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if 108 * DESCRIPTION: Execute the optional _BFS method (Back From Sleep)
106 * it exists in the table. This function is intended for use with
107 * 64-bit host operating systems.
108 * 109 *
109 ******************************************************************************/ 110 ******************************************************************************/
110acpi_status
111acpi_set_firmware_waking_vector64(u64 physical_address)
112{
113 ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector64);
114
115 111
116 /* Determine if the 64-bit vector actually exists */ 112static 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;
117 117
118 if ((acpi_gbl_FACS->length <= 32) || (acpi_gbl_FACS->version < 1)) { 118 if (!bfs)
119 return_ACPI_STATUS(AE_NOT_EXIST); 119 return;
120 }
121 120
122 /* Clear 32-bit vector, set the 64-bit X_ vector */ 121 /* One argument, sleep_state */
123 122
124 acpi_gbl_FACS->firmware_waking_vector = 0; 123 arg_list.count = 1;
125 acpi_gbl_FACS->xfirmware_waking_vector = physical_address; 124 arg_list.pointer = &arg;
125 arg.type = ACPI_TYPE_INTEGER;
126 arg.integer.value = sleep_state;
126 127
127 return_ACPI_STATUS(AE_OK); 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 }
128} 133}
129 134
130ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64)
131#endif
132
133/******************************************************************************* 135/*******************************************************************************
134 * 136 *
135 * FUNCTION: acpi_enter_sleep_state_prep 137 * FUNCTION: acpi_hw_execute_WAK
136 * 138 *
137 * PARAMETERS: sleep_state - Which sleep state to enter 139 * PARAMETERS: sleep_state - Which sleep state we just exited
138 * 140 *
139 * RETURN: Status 141 * RETURN: None
140 * 142 *
141 * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231) 143 * DESCRIPTION: Execute the _WAK method (System Wake)
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 * 144 *
146 ******************************************************************************/ 145 ******************************************************************************/
147acpi_status acpi_enter_sleep_state_prep(u8 sleep_state) 146
147static void acpi_hw_execute_WAK(u8 sleep_state)
148{ 148{
149 acpi_status status;
150 struct acpi_object_list arg_list; 149 struct acpi_object_list arg_list;
151 union acpi_object arg; 150 union acpi_object arg;
151 acpi_status status;
152 152
153 ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep); 153 /* One argument, sleep_state */
154
155 /* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */
156
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);
162 }
163
164 /* Setup parameter object */
165 154
166 arg_list.count = 1; 155 arg_list.count = 1;
167 arg_list.pointer = &arg; 156 arg_list.pointer = &arg;
168
169 arg.type = ACPI_TYPE_INTEGER; 157 arg.type = ACPI_TYPE_INTEGER;
170 arg.integer.value = sleep_state; 158 arg.integer.value = sleep_state;
171 159
172 /* Run the _PTS method */ 160 status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL);
173
174 status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL);
175 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 161 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
176 return_ACPI_STATUS(status); 162 ACPI_EXCEPTION((AE_INFO, status,
163 "While executing method _WAK"));
177 } 164 }
165 /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
166}
178 167
179 /* Setup the argument to _SST */ 168/*******************************************************************************
180 169 *
181 switch (sleep_state) { 170 * FUNCTION: acpi_hw_execute_SST
182 case ACPI_STATE_S0: 171 *
183 arg.integer.value = ACPI_SST_WORKING; 172 * PARAMETERS: indicator_id - Value to be passed to the _SST method
184 break; 173 *
174 * RETURN: None
175 *
176 * DESCRIPTION: Execute the optional _SST method (System Status)
177 *
178 ******************************************************************************/
185 179
186 case ACPI_STATE_S1: 180void acpi_hw_execute_SST(u32 indicator_id)
187 case ACPI_STATE_S2: 181{
188 case ACPI_STATE_S3: 182 struct acpi_object_list arg_list;
189 arg.integer.value = ACPI_SST_SLEEPING; 183 union acpi_object arg;
190 break; 184 acpi_status status;
191 185
192 case ACPI_STATE_S4: 186 /* One argument, status indicator ID */
193 arg.integer.value = ACPI_SST_SLEEP_CONTEXT;
194 break;
195 187
196 default: 188 arg_list.count = 1;
197 arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */ 189 arg_list.pointer = &arg;
198 break; 190 arg.type = ACPI_TYPE_INTEGER;
199 }
200 191
201 /* 192 arg.integer.value = indicator_id;
202 * Set the system indicators to show the desired sleep state.
203 * _SST is an optional method (return no error if not found)
204 */
205 status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); 193 status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
206 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 194 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
207 ACPI_EXCEPTION((AE_INFO, status, 195 ACPI_EXCEPTION((AE_INFO, status,
208 "While executing method _SST")); 196 "While executing method _SST"));
209 } 197 }
210
211 return_ACPI_STATUS(AE_OK);
212} 198}
213 199
214ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
215
216static unsigned int gts, bfs;
217module_param(gts, uint, 0644);
218module_param(bfs, uint, 0644);
219MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
220MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
221
222/******************************************************************************* 200/*******************************************************************************
223 * 201 *
224 * FUNCTION: acpi_enter_sleep_state 202 * FUNCTION: acpi_hw_legacy_sleep
225 * 203 *
226 * PARAMETERS: sleep_state - Which sleep state to enter 204 * PARAMETERS: sleep_state - Which sleep state to enter
227 * 205 *
228 * RETURN: Status 206 * RETURN: Status
229 * 207 *
230 * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231) 208 * DESCRIPTION: Enter a system sleep state via the legacy FADT PM registers
231 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED 209 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
232 * 210 *
233 ******************************************************************************/ 211 ******************************************************************************/
234acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state) 212
213acpi_status acpi_hw_legacy_sleep(u8 sleep_state)
235{ 214{
236 u32 pm1a_control;
237 u32 pm1b_control;
238 struct acpi_bit_register_info *sleep_type_reg_info; 215 struct acpi_bit_register_info *sleep_type_reg_info;
239 struct acpi_bit_register_info *sleep_enable_reg_info; 216 struct acpi_bit_register_info *sleep_enable_reg_info;
217 u32 pm1a_control;
218 u32 pm1b_control;
240 u32 in_value; 219 u32 in_value;
241 struct acpi_object_list arg_list;
242 union acpi_object arg;
243 acpi_status status; 220 acpi_status status;
244 221
245 ACPI_FUNCTION_TRACE(acpi_enter_sleep_state); 222 ACPI_FUNCTION_TRACE(hw_legacy_sleep);
246
247 if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
248 (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
249 ACPI_ERROR((AE_INFO, "Sleep values out of range: A=0x%X B=0x%X",
250 acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
251 return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
252 }
253 223
254 sleep_type_reg_info = 224 sleep_type_reg_info =
255 acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE); 225 acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE);
@@ -271,6 +241,18 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
271 return_ACPI_STATUS(status); 241 return_ACPI_STATUS(status);
272 } 242 }
273 243
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
274 /* 256 /*
275 * 1) Disable/Clear all GPEs 257 * 1) Disable/Clear all GPEs
276 * 2) Enable all wakeup GPEs 258 * 2) Enable all wakeup GPEs
@@ -286,19 +268,9 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
286 return_ACPI_STATUS(status); 268 return_ACPI_STATUS(status);
287 } 269 }
288 270
289 if (gts) { 271 /* Execute the _GTS method (Going To Sleep) */
290 /* Execute the _GTS method */
291 272
292 arg_list.count = 1; 273 acpi_hw_execute_GTS(sleep_state);
293 arg_list.pointer = &arg;
294 arg.type = ACPI_TYPE_INTEGER;
295 arg.integer.value = sleep_state;
296
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 }
301 }
302 274
303 /* Get current value of PM1A control */ 275 /* Get current value of PM1A control */
304 276
@@ -375,114 +347,43 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
375 } 347 }
376 } 348 }
377 349
378 /* Wait until we enter sleep state */ 350 /* Wait for transition back to Working State */
379
380 do {
381 status = acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS,
382 &in_value);
383 if (ACPI_FAILURE(status)) {
384 return_ACPI_STATUS(status);
385 }
386
387 /* Spin until we wake */
388
389 } while (!in_value);
390
391 return_ACPI_STATUS(AE_OK);
392}
393
394ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
395
396/*******************************************************************************
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 ******************************************************************************/
408acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
409{
410 u32 in_value;
411 acpi_status status;
412
413 ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios);
414
415 /* Clear the wake status bit (PM1) */
416
417 status =
418 acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
419 if (ACPI_FAILURE(status)) {
420 return_ACPI_STATUS(status);
421 }
422
423 status = acpi_hw_clear_acpi_status();
424 if (ACPI_FAILURE(status)) {
425 return_ACPI_STATUS(status);
426 }
427
428 /*
429 * 1) Disable/Clear all GPEs
430 * 2) Enable all wakeup GPEs
431 */
432 status = acpi_hw_disable_all_gpes();
433 if (ACPI_FAILURE(status)) {
434 return_ACPI_STATUS(status);
435 }
436 acpi_gbl_system_awake_and_running = FALSE;
437
438 status = acpi_hw_enable_all_wakeup_gpes();
439 if (ACPI_FAILURE(status)) {
440 return_ACPI_STATUS(status);
441 }
442
443 ACPI_FLUSH_CPU_CACHE();
444
445 status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
446 (u32) acpi_gbl_FADT.S4bios_request, 8);
447 351
448 do { 352 do {
449 acpi_os_stall(1000);
450 status = 353 status =
451 acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value); 354 acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value);
452 if (ACPI_FAILURE(status)) { 355 if (ACPI_FAILURE(status)) {
453 return_ACPI_STATUS(status); 356 return_ACPI_STATUS(status);
454 } 357 }
358
455 } while (!in_value); 359 } while (!in_value);
456 360
457 return_ACPI_STATUS(AE_OK); 361 return_ACPI_STATUS(AE_OK);
458} 362}
459 363
460ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
461
462/******************************************************************************* 364/*******************************************************************************
463 * 365 *
464 * FUNCTION: acpi_leave_sleep_state_prep 366 * FUNCTION: acpi_hw_legacy_wake_prep
465 * 367 *
466 * PARAMETERS: sleep_state - Which sleep state we are exiting 368 * PARAMETERS: sleep_state - Which sleep state we just exited
467 * 369 *
468 * RETURN: Status 370 * RETURN: Status
469 * 371 *
470 * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a 372 * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
471 * sleep. 373 * sleep.
472 * Called with interrupts DISABLED. 374 * Called with interrupts ENABLED.
473 * 375 *
474 ******************************************************************************/ 376 ******************************************************************************/
475acpi_status acpi_leave_sleep_state_prep(u8 sleep_state) 377
378acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state)
476{ 379{
477 struct acpi_object_list arg_list;
478 union acpi_object arg;
479 acpi_status status; 380 acpi_status status;
480 struct acpi_bit_register_info *sleep_type_reg_info; 381 struct acpi_bit_register_info *sleep_type_reg_info;
481 struct acpi_bit_register_info *sleep_enable_reg_info; 382 struct acpi_bit_register_info *sleep_enable_reg_info;
482 u32 pm1a_control; 383 u32 pm1a_control;
483 u32 pm1b_control; 384 u32 pm1b_control;
484 385
485 ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep); 386 ACPI_FUNCTION_TRACE(hw_legacy_wake_prep);
486 387
487 /* 388 /*
488 * Set SLP_TYPE and SLP_EN to state S0. 389 * Set SLP_TYPE and SLP_EN to state S0.
@@ -525,25 +426,13 @@ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
525 } 426 }
526 } 427 }
527 428
528 if (bfs) { 429 acpi_hw_execute_BFS(sleep_state);
529 /* Execute the _BFS method */
530
531 arg_list.count = 1;
532 arg_list.pointer = &arg;
533 arg.type = ACPI_TYPE_INTEGER;
534 arg.integer.value = sleep_state;
535
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 }
540 }
541 return_ACPI_STATUS(status); 430 return_ACPI_STATUS(status);
542} 431}
543 432
544/******************************************************************************* 433/*******************************************************************************
545 * 434 *
546 * FUNCTION: acpi_leave_sleep_state 435 * FUNCTION: acpi_hw_legacy_wake
547 * 436 *
548 * PARAMETERS: sleep_state - Which sleep state we just exited 437 * PARAMETERS: sleep_state - Which sleep state we just exited
549 * 438 *
@@ -553,31 +442,17 @@ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
553 * Called with interrupts ENABLED. 442 * Called with interrupts ENABLED.
554 * 443 *
555 ******************************************************************************/ 444 ******************************************************************************/
556acpi_status acpi_leave_sleep_state(u8 sleep_state) 445
446acpi_status acpi_hw_legacy_wake(u8 sleep_state)
557{ 447{
558 struct acpi_object_list arg_list;
559 union acpi_object arg;
560 acpi_status status; 448 acpi_status status;
561 449
562 ACPI_FUNCTION_TRACE(acpi_leave_sleep_state); 450 ACPI_FUNCTION_TRACE(hw_legacy_wake);
563 451
564 /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ 452 /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
565 453
566 acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; 454 acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
567 455 acpi_hw_execute_SST(ACPI_SST_WAKING);
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;
577 status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
578 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
579 ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
580 }
581 456
582 /* 457 /*
583 * GPEs must be enabled before _WAK is called as GPEs 458 * GPEs must be enabled before _WAK is called as GPEs
@@ -591,46 +466,201 @@ acpi_status acpi_leave_sleep_state(u8 sleep_state)
591 if (ACPI_FAILURE(status)) { 466 if (ACPI_FAILURE(status)) {
592 return_ACPI_STATUS(status); 467 return_ACPI_STATUS(status);
593 } 468 }
469
594 status = acpi_hw_enable_all_runtime_gpes(); 470 status = acpi_hw_enable_all_runtime_gpes();
595 if (ACPI_FAILURE(status)) { 471 if (ACPI_FAILURE(status)) {
596 return_ACPI_STATUS(status); 472 return_ACPI_STATUS(status);
597 } 473 }
598 474
599 arg.integer.value = sleep_state; 475 /*
600 status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL); 476 * Now we can execute _WAK, etc. Some machines require that the GPEs
601 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 477 * are enabled before the wake methods are executed.
602 ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK")); 478 */
603 } 479 acpi_hw_execute_WAK(sleep_state);
604 /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
605 480
606 /* 481 /*
607 * Some BIOSes assume that WAK_STS will be cleared on resume and use 482 * Some BIOS code assumes that WAK_STS will be cleared on resume
608 * it to determine whether the system is rebooting or resuming. Clear 483 * and use it to determine whether the system is rebooting or
609 * it for compatibility. 484 * resuming. Clear WAK_STS for compatibility.
610 */ 485 */
611 acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, 1); 486 acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, 1);
612
613 acpi_gbl_system_awake_and_running = TRUE; 487 acpi_gbl_system_awake_and_running = TRUE;
614 488
615 /* Enable power button */ 489 /* Enable power button */
616 490
617 (void) 491 (void)
618 acpi_write_bit_register(acpi_gbl_fixed_event_info 492 acpi_write_bit_register(acpi_gbl_fixed_event_info
619 [ACPI_EVENT_POWER_BUTTON]. 493 [ACPI_EVENT_POWER_BUTTON].
620 enable_register_id, ACPI_ENABLE_EVENT); 494 enable_register_id, ACPI_ENABLE_EVENT);
621 495
622 (void) 496 (void)
623 acpi_write_bit_register(acpi_gbl_fixed_event_info 497 acpi_write_bit_register(acpi_gbl_fixed_event_info
624 [ACPI_EVENT_POWER_BUTTON]. 498 [ACPI_EVENT_POWER_BUTTON].
625 status_register_id, ACPI_CLEAR_STATUS); 499 status_register_id, ACPI_CLEAR_STATUS);
626 500
627 arg.integer.value = ACPI_SST_WORKING; 501 /*
628 status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL); 502 * Enable BM arbitration. This feature is contained within an
629 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 503 * optional register (PM2 Control), so ignore a BAD_ADDRESS
630 ACPI_EXCEPTION((AE_INFO, status, "During Method _SST")); 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);
631 } 509 }
632 510
511 acpi_hw_execute_SST(ACPI_SST_WORKING);
633 return_ACPI_STATUS(status); 512 return_ACPI_STATUS(status);
634} 513}
635 514
636ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state) 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
530acpi_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
607acpi_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
643acpi_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}
diff --git a/drivers/acpi/acpica/hwxfsleep.c b/drivers/acpi/acpica/hwxfsleep.c
new file mode 100644
index 000000000000..29c0fd3810b0
--- /dev/null
+++ b/drivers/acpi/acpica/hwxfsleep.c
@@ -0,0 +1,377 @@
1/******************************************************************************
2 *
3 * Name: hwxfsleep.c - ACPI Hardware Sleep/Wake External Interfaces
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2012, Intel Corp.
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
44#include <acpi/acpi.h>
45#include "accommon.h"
46#include <linux/module.h>
47
48#define _COMPONENT ACPI_HARDWARE
49ACPI_MODULE_NAME("hwxfsleep")
50
51/*******************************************************************************
52 *
53 * FUNCTION: acpi_set_firmware_waking_vector
54 *
55 * PARAMETERS: physical_address - 32-bit physical address of ACPI real mode
56 * entry point.
57 *
58 * RETURN: Status
59 *
60 * DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS
61 *
62 ******************************************************************************/
63acpi_status acpi_set_firmware_waking_vector(u32 physical_address)
64{
65 ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
66
67
68 /*
69 * According to the ACPI specification 2.0c and later, the 64-bit
70 * waking vector should be cleared and the 32-bit waking vector should
71 * be used, unless we want the wake-up code to be called by the BIOS in
72 * Protected Mode. Some systems (for example HP dv5-1004nr) are known
73 * to fail to resume if the 64-bit vector is used.
74 */
75
76 /* Set the 32-bit vector */
77
78 acpi_gbl_FACS->firmware_waking_vector = physical_address;
79
80 /* Clear the 64-bit vector if it exists */
81
82 if ((acpi_gbl_FACS->length > 32) && (acpi_gbl_FACS->version >= 1)) {
83 acpi_gbl_FACS->xfirmware_waking_vector = 0;
84 }
85
86 return_ACPI_STATUS(AE_OK);
87}
88
89ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
90
91#if ACPI_MACHINE_WIDTH == 64
92/*******************************************************************************
93 *
94 * FUNCTION: acpi_set_firmware_waking_vector64
95 *
96 * PARAMETERS: physical_address - 64-bit physical address of ACPI protected
97 * mode entry point.
98 *
99 * RETURN: Status
100 *
101 * DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if
102 * it exists in the table. This function is intended for use with
103 * 64-bit host operating systems.
104 *
105 ******************************************************************************/
106acpi_status acpi_set_firmware_waking_vector64(u64 physical_address)
107{
108 ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector64);
109
110
111 /* Determine if the 64-bit vector actually exists */
112
113 if ((acpi_gbl_FACS->length <= 32) || (acpi_gbl_FACS->version < 1)) {
114 return_ACPI_STATUS(AE_NOT_EXIST);
115 }
116
117 /* Clear 32-bit vector, set the 64-bit X_ vector */
118
119 acpi_gbl_FACS->firmware_waking_vector = 0;
120 acpi_gbl_FACS->xfirmware_waking_vector = physical_address;
121 return_ACPI_STATUS(AE_OK);
122}
123
124ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64)
125#endif
126
127/*******************************************************************************
128 *
129 * FUNCTION: acpi_enter_sleep_state_s4bios
130 *
131 * PARAMETERS: None
132 *
133 * RETURN: Status
134 *
135 * DESCRIPTION: Perform a S4 bios request.
136 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
137 *
138 ******************************************************************************/
139acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
140{
141 u32 in_value;
142 acpi_status status;
143
144 ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios);
145
146 /* Clear the wake status bit (PM1) */
147
148 status =
149 acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
150 if (ACPI_FAILURE(status)) {
151 return_ACPI_STATUS(status);
152 }
153
154 status = acpi_hw_clear_acpi_status();
155 if (ACPI_FAILURE(status)) {
156 return_ACPI_STATUS(status);
157 }
158
159 /*
160 * 1) Disable/Clear all GPEs
161 * 2) Enable all wakeup GPEs
162 */
163 status = acpi_hw_disable_all_gpes();
164 if (ACPI_FAILURE(status)) {
165 return_ACPI_STATUS(status);
166 }
167 acpi_gbl_system_awake_and_running = FALSE;
168
169 status = acpi_hw_enable_all_wakeup_gpes();
170 if (ACPI_FAILURE(status)) {
171 return_ACPI_STATUS(status);
172 }
173
174 ACPI_FLUSH_CPU_CACHE();
175
176 status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
177 (u32)acpi_gbl_FADT.S4bios_request, 8);
178
179 do {
180 acpi_os_stall(1000);
181 status =
182 acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value);
183 if (ACPI_FAILURE(status)) {
184 return_ACPI_STATUS(status);
185 }
186 } while (!in_value);
187
188 return_ACPI_STATUS(AE_OK);
189}
190
191ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
192
193/*******************************************************************************
194 *
195 * FUNCTION: acpi_enter_sleep_state_prep
196 *
197 * PARAMETERS: sleep_state - Which sleep state to enter
198 *
199 * RETURN: Status
200 *
201 * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
202 * This function must execute with interrupts enabled.
203 * We break sleeping into 2 stages so that OSPM can handle
204 * various OS-specific tasks between the two steps.
205 *
206 ******************************************************************************/
207acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
208{
209 acpi_status status;
210 struct acpi_object_list arg_list;
211 union acpi_object arg;
212 u32 sst_value;
213
214 ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);
215
216 /* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */
217
218 status = acpi_get_sleep_type_data(sleep_state,
219 &acpi_gbl_sleep_type_a,
220 &acpi_gbl_sleep_type_b);
221 if (ACPI_FAILURE(status)) {
222 return_ACPI_STATUS(status);
223 }
224
225 /* Execute the _PTS method (Prepare To Sleep) */
226
227 arg_list.count = 1;
228 arg_list.pointer = &arg;
229 arg.type = ACPI_TYPE_INTEGER;
230 arg.integer.value = sleep_state;
231
232 status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL);
233 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
234 return_ACPI_STATUS(status);
235 }
236
237 /* Setup the argument to the _SST method (System STatus) */
238
239 switch (sleep_state) {
240 case ACPI_STATE_S0:
241 sst_value = ACPI_SST_WORKING;
242 break;
243
244 case ACPI_STATE_S1:
245 case ACPI_STATE_S2:
246 case ACPI_STATE_S3:
247 sst_value = ACPI_SST_SLEEPING;
248 break;
249
250 case ACPI_STATE_S4:
251 sst_value = ACPI_SST_SLEEP_CONTEXT;
252 break;
253
254 default:
255 sst_value = ACPI_SST_INDICATOR_OFF; /* Default is off */
256 break;
257 }
258
259 /*
260 * Set the system indicators to show the desired sleep state.
261 * _SST is an optional method (return no error if not found)
262 */
263 acpi_hw_execute_SST(sst_value);
264 return_ACPI_STATUS(AE_OK);
265}
266
267ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
268
269/*******************************************************************************
270 *
271 * FUNCTION: acpi_enter_sleep_state
272 *
273 * PARAMETERS: sleep_state - Which sleep state to enter
274 *
275 * RETURN: Status
276 *
277 * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
278 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
279 *
280 ******************************************************************************/
281acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
282{
283 acpi_status status;
284
285 ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);
286
287 if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
288 (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
289 ACPI_ERROR((AE_INFO, "Sleep values out of range: A=0x%X B=0x%X",
290 acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
291 return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
292 }
293
294 /* If Hardware Reduced flag is set, must use the extended sleep registers */
295
296 if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
297 status = acpi_hw_extended_sleep(sleep_state);
298 } else {
299 /* Legacy sleep */
300
301 status = acpi_hw_legacy_sleep(sleep_state);
302 }
303
304 return_ACPI_STATUS(status);
305}
306
307ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
308
309/*******************************************************************************
310 *
311 * FUNCTION: acpi_leave_sleep_state_prep
312 *
313 * PARAMETERS: sleep_state - Which sleep state we are exiting
314 *
315 * RETURN: Status
316 *
317 * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
318 * sleep.
319 * Called with interrupts DISABLED.
320 *
321 ******************************************************************************/
322acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
323{
324 acpi_status status;
325
326 ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
327
328
329 /* If Hardware Reduced flag is set, must use the extended sleep registers */
330
331 if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
332 status = acpi_hw_extended_wake_prep(sleep_state);
333 } else {
334 /* Legacy sleep */
335
336 status = acpi_hw_legacy_wake_prep(sleep_state);
337 }
338
339
340 return_ACPI_STATUS(status);
341}
342
343ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state_prep)
344
345/*******************************************************************************
346 *
347 * FUNCTION: acpi_leave_sleep_state
348 *
349 * PARAMETERS: sleep_state - Which sleep state we just exited
350 *
351 * RETURN: Status
352 *
353 * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
354 * Called with interrupts ENABLED.
355 *
356 ******************************************************************************/
357acpi_status acpi_leave_sleep_state(u8 sleep_state)
358{
359 acpi_status status;
360
361 ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
362
363
364 /* If Hardware Reduced flag is set, must use the extended sleep registers */
365
366 if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
367 status = acpi_hw_extended_wake(sleep_state);
368 } else {
369 /* Legacy sleep */
370
371 status = acpi_hw_legacy_wake(sleep_state);
372 }
373
374 return_ACPI_STATUS(status);
375}
376
377ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-26 15:09:30 -0500