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ACPICA: ACPI 5: Support for new FADT SleepStatus, SleepControl registers

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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>
This commit is contained in:
Bob Moore 2012-02-14 15:00:53 +08:00 committed by Len Brown
parent 384fe875ef
commit 2feec47d4c
5 changed files with 752 additions and 320 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/acpi/acpica/Makefile
View file

@ -73,7 +73,8 @@ acpi-y += \
hwregs.o \
hwsleep.o \
hwvalid.o \
hwxface.o
hwxface.o \
hwxfsleep.o
acpi-$(ACPI_FUTURE_USAGE) += hwtimer.o

17
drivers/acpi/acpica/achware.h
View file

@ -80,6 +80,23 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value);
acpi_status acpi_hw_clear_acpi_status(void);
/*
* hwsleep - sleep/wake support
*/
void acpi_hw_execute_SST(u32 value);
acpi_status acpi_hw_extended_sleep(u8 sleep_state);
acpi_status acpi_hw_legacy_sleep(u8 sleep_state);
acpi_status acpi_hw_extended_wake_prep(u8 sleep_state);
acpi_status acpi_hw_extended_wake(u8 sleep_state);
acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state);
acpi_status acpi_hw_legacy_wake(u8 sleep_state);
/*
* hwvalid - Port I/O with validation
*/

668
drivers/acpi/acpica/hwsleep.c
View file

@ -1,7 +1,6 @@
/******************************************************************************
*
* Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
* Name: hwsleep.c - ACPI Hardware Sleep/Wake Support Functions
*
*****************************************************************************/
@ -44,174 +43,18 @@
#include <acpi/acpi.h>
#include "accommon.h"
#include "actables.h"
#include <linux/tboot.h>
#include <linux/module.h>
#define _COMPONENT ACPI_HARDWARE
ACPI_MODULE_NAME("hwsleep")
/*******************************************************************************
*
* FUNCTION: acpi_set_firmware_waking_vector
*
* PARAMETERS: physical_address - 32-bit physical address of ACPI real mode
* entry point.
*
* RETURN: Status
*
* DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS
*
******************************************************************************/
acpi_status
acpi_set_firmware_waking_vector(u32 physical_address)
{
ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
/* Local prototypes */
static void acpi_hw_execute_GTS(u8 sleep_state);
static void acpi_hw_execute_BFS(u8 sleep_state);
/*
* According to the ACPI specification 2.0c and later, the 64-bit
* waking vector should be cleared and the 32-bit waking vector should
* be used, unless we want the wake-up code to be called by the BIOS in
* Protected Mode. Some systems (for example HP dv5-1004nr) are known
* to fail to resume if the 64-bit vector is used.
*/
/* Set the 32-bit vector */
acpi_gbl_FACS->firmware_waking_vector = physical_address;
/* Clear the 64-bit vector if it exists */
if ((acpi_gbl_FACS->length > 32) && (acpi_gbl_FACS->version >= 1)) {
acpi_gbl_FACS->xfirmware_waking_vector = 0;
}
return_ACPI_STATUS(AE_OK);
}
ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
#if ACPI_MACHINE_WIDTH == 64
/*******************************************************************************
*
* FUNCTION: acpi_set_firmware_waking_vector64
*
* PARAMETERS: physical_address - 64-bit physical address of ACPI protected
* mode entry point.
*
* RETURN: Status
*
* DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if
* it exists in the table. This function is intended for use with
* 64-bit host operating systems.
*
******************************************************************************/
acpi_status
acpi_set_firmware_waking_vector64(u64 physical_address)
{
ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector64);
/* Determine if the 64-bit vector actually exists */
if ((acpi_gbl_FACS->length <= 32) || (acpi_gbl_FACS->version < 1)) {
return_ACPI_STATUS(AE_NOT_EXIST);
}
/* Clear 32-bit vector, set the 64-bit X_ vector */
acpi_gbl_FACS->firmware_waking_vector = 0;
acpi_gbl_FACS->xfirmware_waking_vector = physical_address;
return_ACPI_STATUS(AE_OK);
}
ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64)
#endif
/*******************************************************************************
*
* FUNCTION: acpi_enter_sleep_state_prep
*
* PARAMETERS: sleep_state - Which sleep state to enter
*
* RETURN: Status
*
* DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
* This function must execute with interrupts enabled.
* We break sleeping into 2 stages so that OSPM can handle
* various OS-specific tasks between the two steps.
*
******************************************************************************/
acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
{
acpi_status status;
struct acpi_object_list arg_list;
union acpi_object arg;
ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);
/* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */
status = acpi_get_sleep_type_data(sleep_state,
&acpi_gbl_sleep_type_a,
&acpi_gbl_sleep_type_b);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Setup parameter object */
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = sleep_state;
/* Run the _PTS method */
status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
return_ACPI_STATUS(status);
}
/* Setup the argument to _SST */
switch (sleep_state) {
case ACPI_STATE_S0:
arg.integer.value = ACPI_SST_WORKING;
break;
case ACPI_STATE_S1:
case ACPI_STATE_S2:
case ACPI_STATE_S3:
arg.integer.value = ACPI_SST_SLEEPING;
break;
case ACPI_STATE_S4:
arg.integer.value = ACPI_SST_SLEEP_CONTEXT;
break;
default:
arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */
break;
}
/*
* Set the system indicators to show the desired sleep state.
* _SST is an optional method (return no error if not found)
*/
status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
ACPI_EXCEPTION((AE_INFO, status,
"While executing method _SST"));
}
return_ACPI_STATUS(AE_OK);
}
ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
static void acpi_hw_execute_WAK(u8 sleep_state);
static unsigned int gts, bfs;
module_param(gts, uint, 0644);
@ -221,35 +64,162 @@ MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
/*******************************************************************************
*
* FUNCTION: acpi_enter_sleep_state
* FUNCTION: acpi_hw_execute_GTS
*
* PARAMETERS: sleep_state - Sleep state that will be entered
*
* RETURN: None
*
* DESCRIPTION: Execute the optional _GTS method (Going To Sleep)
*
******************************************************************************/
static void acpi_hw_execute_GTS(u8 sleep_state)
{
struct acpi_object_list arg_list;
union acpi_object arg;
acpi_status status;
if (!gts)
return;
/* One argument, sleep_state */
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = sleep_state;
status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
ACPI_EXCEPTION((AE_INFO, status,
"While executing method _GTS"));
}
}
/*******************************************************************************
*
* FUNCTION: acpi_hw_execute_BFS
*
* PARAMETERS: sleep_state - Which sleep state we just exited
*
* RETURN: None
*
* DESCRIPTION: Execute the optional _BFS method (Back From Sleep)
*
******************************************************************************/
static void acpi_hw_execute_BFS(u8 sleep_state)
{
struct acpi_object_list arg_list;
union acpi_object arg;
acpi_status status;
if (!bfs)
return;
/* One argument, sleep_state */
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = sleep_state;
status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
ACPI_EXCEPTION((AE_INFO, status,
"While executing method _BFS"));
}
}
/*******************************************************************************
*
* FUNCTION: acpi_hw_execute_WAK
*
* PARAMETERS: sleep_state - Which sleep state we just exited
*
* RETURN: None
*
* DESCRIPTION: Execute the _WAK method (System Wake)
*
******************************************************************************/
static void acpi_hw_execute_WAK(u8 sleep_state)
{
struct acpi_object_list arg_list;
union acpi_object arg;
acpi_status status;
/* One argument, sleep_state */
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = sleep_state;
status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
ACPI_EXCEPTION((AE_INFO, status,
"While executing method _WAK"));
}
/* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
}
/*******************************************************************************
*
* FUNCTION: acpi_hw_execute_SST
*
* PARAMETERS: indicator_id - Value to be passed to the _SST method
*
* RETURN: None
*
* DESCRIPTION: Execute the optional _SST method (System Status)
*
******************************************************************************/
void acpi_hw_execute_SST(u32 indicator_id)
{
struct acpi_object_list arg_list;
union acpi_object arg;
acpi_status status;
/* One argument, status indicator ID */
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = indicator_id;
status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
ACPI_EXCEPTION((AE_INFO, status,
"While executing method _SST"));
}
}
/*******************************************************************************
*
* FUNCTION: acpi_hw_legacy_sleep
*
* PARAMETERS: sleep_state - Which sleep state to enter
*
* RETURN: Status
*
* DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
* DESCRIPTION: Enter a system sleep state via the legacy FADT PM registers
* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
*
******************************************************************************/
acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
acpi_status acpi_hw_legacy_sleep(u8 sleep_state)
{
u32 pm1a_control;
u32 pm1b_control;
struct acpi_bit_register_info *sleep_type_reg_info;
struct acpi_bit_register_info *sleep_enable_reg_info;
u32 pm1a_control;
u32 pm1b_control;
u32 in_value;
struct acpi_object_list arg_list;
union acpi_object arg;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);
if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
(acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
ACPI_ERROR((AE_INFO, "Sleep values out of range: A=0x%X B=0x%X",
acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
}
ACPI_FUNCTION_TRACE(hw_legacy_sleep);
sleep_type_reg_info =
acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE);
@ -271,6 +241,18 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
return_ACPI_STATUS(status);
}
if (sleep_state != ACPI_STATE_S5) {
/*
* Disable BM arbitration. This feature is contained within an
* optional register (PM2 Control), so ignore a BAD_ADDRESS
* exception.
*/
status = acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 1);
if (ACPI_FAILURE(status) && (status != AE_BAD_ADDRESS)) {
return_ACPI_STATUS(status);
}
}
/*
* 1) Disable/Clear all GPEs
* 2) Enable all wakeup GPEs
@ -286,19 +268,9 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
return_ACPI_STATUS(status);
}
if (gts) {
/* Execute the _GTS method */
/* Execute the _GTS method (Going To Sleep) */
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = sleep_state;
status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
return_ACPI_STATUS(status);
}
}
acpi_hw_execute_GTS(sleep_state);
/* Get current value of PM1A control */
@ -375,114 +347,43 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
}
}
/* Wait until we enter sleep state */
/* Wait for transition back to Working State */
do {
status = acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS,
&in_value);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Spin until we wake */
} while (!in_value);
return_ACPI_STATUS(AE_OK);
}
ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
/*******************************************************************************
*
* FUNCTION: acpi_enter_sleep_state_s4bios
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Perform a S4 bios request.
* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
*
******************************************************************************/
acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
{
u32 in_value;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios);
/* Clear the wake status bit (PM1) */
status =
acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_hw_clear_acpi_status();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* 1) Disable/Clear all GPEs
* 2) Enable all wakeup GPEs
*/
status = acpi_hw_disable_all_gpes();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
acpi_gbl_system_awake_and_running = FALSE;
status = acpi_hw_enable_all_wakeup_gpes();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
ACPI_FLUSH_CPU_CACHE();
status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
(u32) acpi_gbl_FADT.S4bios_request, 8);
do {
acpi_os_stall(1000);
status =
acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
} while (!in_value);
return_ACPI_STATUS(AE_OK);
}
ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
/*******************************************************************************
*
* FUNCTION: acpi_leave_sleep_state_prep
* FUNCTION: acpi_hw_legacy_wake_prep
*
* PARAMETERS: sleep_state - Which sleep state we are exiting
* PARAMETERS: sleep_state - Which sleep state we just exited
*
* RETURN: Status
*
* DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
* sleep.
* Called with interrupts DISABLED.
* Called with interrupts ENABLED.
*
******************************************************************************/
acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state)
{
struct acpi_object_list arg_list;
union acpi_object arg;
acpi_status status;
struct acpi_bit_register_info *sleep_type_reg_info;
struct acpi_bit_register_info *sleep_enable_reg_info;
u32 pm1a_control;
u32 pm1b_control;
ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep);
ACPI_FUNCTION_TRACE(hw_legacy_wake_prep);
/*
* Set SLP_TYPE and SLP_EN to state S0.
@ -525,25 +426,13 @@ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
}
}
if (bfs) {
/* Execute the _BFS method */
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = sleep_state;
status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
}
}
acpi_hw_execute_BFS(sleep_state);
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_leave_sleep_state
* FUNCTION: acpi_hw_legacy_wake
*
* PARAMETERS: sleep_state - Which sleep state we just exited
*
@ -553,31 +442,17 @@ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
* Called with interrupts ENABLED.
*
******************************************************************************/
acpi_status acpi_leave_sleep_state(u8 sleep_state)
acpi_status acpi_hw_legacy_wake(u8 sleep_state)
{
struct acpi_object_list arg_list;
union acpi_object arg;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
ACPI_FUNCTION_TRACE(hw_legacy_wake);
/* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
/* Setup parameter object */
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
/* Ignore any errors from these methods */
arg.integer.value = ACPI_SST_WAKING;
status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
}
acpi_hw_execute_SST(ACPI_SST_WAKING);
/*
* GPEs must be enabled before _WAK is called as GPEs
@ -591,46 +466,201 @@ acpi_status acpi_leave_sleep_state(u8 sleep_state)
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_hw_enable_all_runtime_gpes();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
arg.integer.value = sleep_state;
status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK"));
}
/* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
/*
* Now we can execute _WAK, etc. Some machines require that the GPEs
* are enabled before the wake methods are executed.
*/
acpi_hw_execute_WAK(sleep_state);
/*
* Some BIOSes assume that WAK_STS will be cleared on resume and use
* it to determine whether the system is rebooting or resuming. Clear
* it for compatibility.
* Some BIOS code assumes that WAK_STS will be cleared on resume
* and use it to determine whether the system is rebooting or
* resuming. Clear WAK_STS for compatibility.
*/
acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, 1);
acpi_gbl_system_awake_and_running = TRUE;
/* Enable power button */
(void)
acpi_write_bit_register(acpi_gbl_fixed_event_info
[ACPI_EVENT_POWER_BUTTON].
enable_register_id, ACPI_ENABLE_EVENT);
[ACPI_EVENT_POWER_BUTTON].
enable_register_id, ACPI_ENABLE_EVENT);
(void)
acpi_write_bit_register(acpi_gbl_fixed_event_info
[ACPI_EVENT_POWER_BUTTON].
status_register_id, ACPI_CLEAR_STATUS);
[ACPI_EVENT_POWER_BUTTON].
status_register_id, ACPI_CLEAR_STATUS);
arg.integer.value = ACPI_SST_WORKING;
status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
/*
* Enable BM arbitration. This feature is contained within an
* optional register (PM2 Control), so ignore a BAD_ADDRESS
* exception.
*/
status = acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 0);
if (ACPI_FAILURE(status) && (status != AE_BAD_ADDRESS)) {
return_ACPI_STATUS(status);
}
acpi_hw_execute_SST(ACPI_SST_WORKING);
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)
/*******************************************************************************
*
* FUNCTION: acpi_hw_extended_sleep
*
* PARAMETERS: sleep_state - Which sleep state to enter
*
* RETURN: Status
*
* DESCRIPTION: Enter a system sleep state via the extended FADT sleep
* registers (V5 FADT).
* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
*
******************************************************************************/
acpi_status acpi_hw_extended_sleep(u8 sleep_state)
{
acpi_status status;
u8 sleep_type_value;
u64 sleep_status;
ACPI_FUNCTION_TRACE(hw_extended_sleep);
/* Extended sleep registers must be valid */
if (!acpi_gbl_FADT.sleep_control.address ||
!acpi_gbl_FADT.sleep_status.address) {
return_ACPI_STATUS(AE_NOT_EXIST);
}
/* Clear wake status (WAK_STS) */
status = acpi_write(ACPI_X_WAKE_STATUS, &acpi_gbl_FADT.sleep_status);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
acpi_gbl_system_awake_and_running = FALSE;
/* Execute the _GTS method (Going To Sleep) */
acpi_hw_execute_GTS(sleep_state);
/* Flush caches, as per ACPI specification */
ACPI_FLUSH_CPU_CACHE();
/*
* Set the SLP_TYP and SLP_EN bits.
*
* Note: We only use the first value returned by the \_Sx method
* (acpi_gbl_sleep_type_a) - As per ACPI specification.
*/
ACPI_DEBUG_PRINT((ACPI_DB_INIT,
"Entering sleep state [S%u]\n", sleep_state));
sleep_type_value =
((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) &
ACPI_X_SLEEP_TYPE_MASK);
status = acpi_write((sleep_type_value | ACPI_X_SLEEP_ENABLE),
&acpi_gbl_FADT.sleep_control);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Wait for transition back to Working State */
do {
status = acpi_read(&sleep_status, &acpi_gbl_FADT.sleep_status);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
} while (!(((u8)sleep_status) & ACPI_X_WAKE_STATUS));
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_hw_extended_wake_prep
*
* PARAMETERS: sleep_state - Which sleep state we just exited
*
* RETURN: Status
*
* DESCRIPTION: Perform first part of OS-independent ACPI cleanup after
* a sleep. Called with interrupts ENABLED.
*
******************************************************************************/
acpi_status acpi_hw_extended_wake_prep(u8 sleep_state)
{
acpi_status status;
u8 sleep_type_value;
ACPI_FUNCTION_TRACE(hw_extended_wake_prep);
status = acpi_get_sleep_type_data(ACPI_STATE_S0,
&acpi_gbl_sleep_type_a,
&acpi_gbl_sleep_type_b);
if (ACPI_SUCCESS(status)) {
sleep_type_value =
((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) &
ACPI_X_SLEEP_TYPE_MASK);
(void)acpi_write((sleep_type_value | ACPI_X_SLEEP_ENABLE),
&acpi_gbl_FADT.sleep_control);
}
acpi_hw_execute_BFS(sleep_state);
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_hw_extended_wake
*
* PARAMETERS: sleep_state - Which sleep state we just exited
*
* RETURN: Status
*
* DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
* Called with interrupts ENABLED.
*
******************************************************************************/
acpi_status acpi_hw_extended_wake(u8 sleep_state)
{
ACPI_FUNCTION_TRACE(hw_extended_wake);
/* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
/* Execute the wake methods */
acpi_hw_execute_SST(ACPI_SST_WAKING);
acpi_hw_execute_WAK(sleep_state);
/*
* Some BIOS code assumes that WAK_STS will be cleared on resume
* and use it to determine whether the system is rebooting or
* resuming. Clear WAK_STS for compatibility.
*/
(void)acpi_write(ACPI_X_WAKE_STATUS, &acpi_gbl_FADT.sleep_status);
acpi_gbl_system_awake_and_running = TRUE;
acpi_hw_execute_SST(ACPI_SST_WORKING);
return_ACPI_STATUS(AE_OK);
}

377
drivers/acpi/acpica/hwxfsleep.c Normal file
View file

@ -0,0 +1,377 @@
/******************************************************************************
*
* Name: hwxfsleep.c - ACPI Hardware Sleep/Wake External Interfaces
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2012, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include "accommon.h"
#include <linux/module.h>
#define _COMPONENT ACPI_HARDWARE
ACPI_MODULE_NAME("hwxfsleep")
/*******************************************************************************
*
* FUNCTION: acpi_set_firmware_waking_vector
*
* PARAMETERS: physical_address - 32-bit physical address of ACPI real mode
* entry point.
*
* RETURN: Status
*
* DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS
*
******************************************************************************/
acpi_status acpi_set_firmware_waking_vector(u32 physical_address)
{
ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
/*
* According to the ACPI specification 2.0c and later, the 64-bit
* waking vector should be cleared and the 32-bit waking vector should
* be used, unless we want the wake-up code to be called by the BIOS in
* Protected Mode. Some systems (for example HP dv5-1004nr) are known
* to fail to resume if the 64-bit vector is used.
*/
/* Set the 32-bit vector */
acpi_gbl_FACS->firmware_waking_vector = physical_address;
/* Clear the 64-bit vector if it exists */
if ((acpi_gbl_FACS->length > 32) && (acpi_gbl_FACS->version >= 1)) {
acpi_gbl_FACS->xfirmware_waking_vector = 0;
}
return_ACPI_STATUS(AE_OK);
}
ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
#if ACPI_MACHINE_WIDTH == 64
/*******************************************************************************
*
* FUNCTION: acpi_set_firmware_waking_vector64
*
* PARAMETERS: physical_address - 64-bit physical address of ACPI protected
* mode entry point.
*
* RETURN: Status
*
* DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if
* it exists in the table. This function is intended for use with
* 64-bit host operating systems.
*
******************************************************************************/
acpi_status acpi_set_firmware_waking_vector64(u64 physical_address)
{
ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector64);
/* Determine if the 64-bit vector actually exists */
if ((acpi_gbl_FACS->length <= 32) || (acpi_gbl_FACS->version < 1)) {
return_ACPI_STATUS(AE_NOT_EXIST);
}
/* Clear 32-bit vector, set the 64-bit X_ vector */
acpi_gbl_FACS->firmware_waking_vector = 0;
acpi_gbl_FACS->xfirmware_waking_vector = physical_address;
return_ACPI_STATUS(AE_OK);
}
ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64)
#endif
/*******************************************************************************
*
* FUNCTION: acpi_enter_sleep_state_s4bios
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Perform a S4 bios request.
* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
*
******************************************************************************/
acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
{
u32 in_value;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios);
/* Clear the wake status bit (PM1) */
status =
acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_hw_clear_acpi_status();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* 1) Disable/Clear all GPEs
* 2) Enable all wakeup GPEs
*/
status = acpi_hw_disable_all_gpes();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
acpi_gbl_system_awake_and_running = FALSE;
status = acpi_hw_enable_all_wakeup_gpes();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
ACPI_FLUSH_CPU_CACHE();
status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
(u32)acpi_gbl_FADT.S4bios_request, 8);
do {
acpi_os_stall(1000);
status =
acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
} while (!in_value);
return_ACPI_STATUS(AE_OK);
}
ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
/*******************************************************************************
*
* FUNCTION: acpi_enter_sleep_state_prep
*
* PARAMETERS: sleep_state - Which sleep state to enter
*
* RETURN: Status
*
* DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
* This function must execute with interrupts enabled.
* We break sleeping into 2 stages so that OSPM can handle
* various OS-specific tasks between the two steps.
*
******************************************************************************/
acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
{
acpi_status status;
struct acpi_object_list arg_list;
union acpi_object arg;
u32 sst_value;
ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);
/* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */
status = acpi_get_sleep_type_data(sleep_state,
&acpi_gbl_sleep_type_a,
&acpi_gbl_sleep_type_b);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Execute the _PTS method (Prepare To Sleep) */
arg_list.count = 1;
arg_list.pointer = &arg;
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = sleep_state;
status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
return_ACPI_STATUS(status);
}
/* Setup the argument to the _SST method (System STatus) */
switch (sleep_state) {
case ACPI_STATE_S0:
sst_value = ACPI_SST_WORKING;
break;
case ACPI_STATE_S1:
case ACPI_STATE_S2:
case ACPI_STATE_S3:
sst_value = ACPI_SST_SLEEPING;
break;
case ACPI_STATE_S4:
sst_value = ACPI_SST_SLEEP_CONTEXT;
break;
default:
sst_value = ACPI_SST_INDICATOR_OFF; /* Default is off */
break;
}
/*
* Set the system indicators to show the desired sleep state.
* _SST is an optional method (return no error if not found)
*/
acpi_hw_execute_SST(sst_value);
return_ACPI_STATUS(AE_OK);
}
ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
/*******************************************************************************
*
* FUNCTION: acpi_enter_sleep_state
*
* PARAMETERS: sleep_state - Which sleep state to enter
*
* RETURN: Status
*
* DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
*
******************************************************************************/
acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
{
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);
if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
(acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
ACPI_ERROR((AE_INFO, "Sleep values out of range: A=0x%X B=0x%X",
acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
}
/* If Hardware Reduced flag is set, must use the extended sleep registers */
if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
status = acpi_hw_extended_sleep(sleep_state);
} else {
/* Legacy sleep */
status = acpi_hw_legacy_sleep(sleep_state);
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
/*******************************************************************************
*
* FUNCTION: acpi_leave_sleep_state_prep
*
* PARAMETERS: sleep_state - Which sleep state we are exiting
*
* RETURN: Status
*
* DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
* sleep.
* Called with interrupts DISABLED.
*
******************************************************************************/
acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
{
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
/* If Hardware Reduced flag is set, must use the extended sleep registers */
if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
status = acpi_hw_extended_wake_prep(sleep_state);
} else {
/* Legacy sleep */
status = acpi_hw_legacy_wake_prep(sleep_state);
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state_prep)
/*******************************************************************************
*
* FUNCTION: acpi_leave_sleep_state
*
* PARAMETERS: sleep_state - Which sleep state we just exited
*
* RETURN: Status
*
* DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
* Called with interrupts ENABLED.
*
******************************************************************************/
acpi_status acpi_leave_sleep_state(u8 sleep_state)
{
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
/* If Hardware Reduced flag is set, must use the extended sleep registers */
if (acpi_gbl_reduced_hardware || acpi_gbl_FADT.sleep_control.address) {
status = acpi_hw_extended_wake(sleep_state);
} else {
/* Legacy sleep */
status = acpi_hw_legacy_wake(sleep_state);
}
return_ACPI_STATUS(status);
}
ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)

7
include/acpi/actbl.h
View file

@ -309,6 +309,13 @@ enum acpi_prefered_pm_profiles {
PM_TABLET = 8
};
/* Values for sleep_status and sleep_control registers (V5 FADT) */
#define ACPI_X_WAKE_STATUS 0x80
#define ACPI_X_SLEEP_TYPE_MASK 0x1C
#define ACPI_X_SLEEP_TYPE_POSITION 0x02
#define ACPI_X_SLEEP_ENABLE 0x20
/* Reset to default packing */
#pragma pack()