-
/******************************************************************************
*
- * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
+ * Name: hwsleep.c - ACPI Hardware Sleep/Wake Support Functions
*
*****************************************************************************/
#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")
+/* Local prototypes */
+static void acpi_hw_execute_GTS(u8 sleep_state);
+
+static void acpi_hw_execute_BFS(u8 sleep_state);
+
+static void acpi_hw_execute_WAK(u8 sleep_state);
+
+static unsigned int gts, bfs;
+module_param(gts, uint, 0644);
+module_param(bfs, uint, 0644);
+MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
+MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
+
/*******************************************************************************
*
- * FUNCTION: acpi_set_firmware_waking_vector
+ * FUNCTION: acpi_hw_execute_GTS
*
- * PARAMETERS: physical_address - 32-bit physical address of ACPI real mode
- * entry point.
+ * PARAMETERS: sleep_state - Sleep state that will be entered
*
- * RETURN: Status
+ * RETURN: None
*
- * DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS
+ * DESCRIPTION: Execute the optional _GTS method (Going To Sleep)
*
******************************************************************************/
-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.
- */
+static void acpi_hw_execute_GTS(u8 sleep_state)
+{
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
+ acpi_status status;
- /* Set the 32-bit vector */
+ if (!gts)
+ return;
- acpi_gbl_FACS->firmware_waking_vector = physical_address;
+ /* One argument, sleep_state */
- /* Clear the 64-bit vector if it exists */
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = sleep_state;
- if ((acpi_gbl_FACS->length > 32) && (acpi_gbl_FACS->version >= 1)) {
- acpi_gbl_FACS->xfirmware_waking_vector = 0;
+ 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"));
}
-
- return_ACPI_STATUS(AE_OK);
}
-ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
-
-#if ACPI_MACHINE_WIDTH == 64
/*******************************************************************************
*
- * FUNCTION: acpi_set_firmware_waking_vector64
+ * FUNCTION: acpi_hw_execute_BFS
*
- * PARAMETERS: physical_address - 64-bit physical address of ACPI protected
- * mode entry point.
+ * PARAMETERS: sleep_state - Which sleep state we just exited
*
- * RETURN: Status
+ * RETURN: None
*
- * 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.
+ * DESCRIPTION: Execute the optional _BFS method (Back From Sleep)
*
******************************************************************************/
-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 */
+static void acpi_hw_execute_BFS(u8 sleep_state)
+{
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
+ acpi_status status;
- if ((acpi_gbl_FACS->length <= 32) || (acpi_gbl_FACS->version < 1)) {
- return_ACPI_STATUS(AE_NOT_EXIST);
- }
+ if (!bfs)
+ return;
- /* Clear 32-bit vector, set the 64-bit X_ vector */
+ /* One argument, sleep_state */
- acpi_gbl_FACS->firmware_waking_vector = 0;
- acpi_gbl_FACS->xfirmware_waking_vector = physical_address;
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = sleep_state;
- return_ACPI_STATUS(AE_OK);
+ 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"));
+ }
}
-ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64)
-#endif
-
/*******************************************************************************
*
- * FUNCTION: acpi_enter_sleep_state_prep
+ * FUNCTION: acpi_hw_execute_WAK
*
- * PARAMETERS: sleep_state - Which sleep state to enter
+ * PARAMETERS: sleep_state - Which sleep state we just exited
*
- * RETURN: Status
+ * RETURN: None
*
- * 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.
+ * DESCRIPTION: Execute the _WAK method (System Wake)
*
******************************************************************************/
-acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
+
+static void acpi_hw_execute_WAK(u8 sleep_state)
{
- acpi_status status;
struct acpi_object_list arg_list;
union acpi_object arg;
+ acpi_status status;
- 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 */
+ /* One argument, sleep_state */
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);
+ status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
- return_ACPI_STATUS(status);
+ ACPI_EXCEPTION((AE_INFO, status,
+ "While executing method _WAK"));
}
+ /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
+}
- /* Setup the argument to _SST */
-
- switch (sleep_state) {
- case ACPI_STATE_S0:
- arg.integer.value = ACPI_SST_WORKING;
- break;
+/*******************************************************************************
+ *
+ * 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)
+ *
+ ******************************************************************************/
- case ACPI_STATE_S1:
- case ACPI_STATE_S2:
- case ACPI_STATE_S3:
- arg.integer.value = ACPI_SST_SLEEPING;
- break;
+void acpi_hw_execute_SST(u32 indicator_id)
+{
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
+ acpi_status status;
- case ACPI_STATE_S4:
- arg.integer.value = ACPI_SST_SLEEP_CONTEXT;
- break;
+ /* One argument, status indicator ID */
- default:
- arg.integer.value = ACPI_SST_INDICATOR_OFF; /* Default is off */
- break;
- }
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
- /*
- * Set the system indicators to show the desired sleep state.
- * _SST is an optional method (return no error if not found)
- */
+ 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"));
}
-
- return_ACPI_STATUS(AE_OK);
}
-ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
-
-static unsigned int gts, bfs;
-module_param(gts, uint, 0644);
-module_param(bfs, uint, 0644);
-MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
-MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
-
/*******************************************************************************
*
- * FUNCTION: acpi_enter_sleep_state
+ * 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);
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
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 */
}
}
- /* Wait until we enter sleep 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);
+ /* Wait for transition back to Working State */
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.
}
}
- 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
*
* 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
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);
+}
--- /dev/null
+/******************************************************************************
+ *
+ * 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)
projects / mirror_ubuntu-kernels.git / commitdiff