--- /dev/null
+/******************************************************************************
+ *
+ * Name: hwesleep.c - ACPI Hardware Sleep/Wake Support functions for the
+ * extended FADT-V5 sleep registers.
+ *
+ *****************************************************************************/
+
+/*
+ * 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("hwesleep")
+
+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_hw_execute_sleep_method
+ *
+ * PARAMETERS: method_name - Pathname of method to execute
+ * integer_argument - Argument to pass to the method
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Execute a sleep/wake related method with one integer argument
+ * and no return value.
+ *
+ ******************************************************************************/
+void acpi_hw_execute_sleep_method(char *method_name, u32 integer_argument)
+{
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(hw_execute_sleep_method);
+
+ if (!ACPI_STRCMP(METHOD_NAME__GTS, method_name) && !gts)
+ return_VOID;
+
+ if (!ACPI_STRCMP(METHOD_NAME__BFS, method_name) && !bfs)
+ return_VOID;
+
+ /* One argument, integer_argument; No return value expected */
+
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = (u64)integer_argument;
+
+ status = acpi_evaluate_object(NULL, method_name, &arg_list, NULL);
+ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+ ACPI_EXCEPTION((AE_INFO, status, "While executing method %s",
+ method_name));
+ }
+
+ return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * 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_sleep_method(METHOD_NAME__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_sleep_method(METHOD_NAME__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_sleep_method(METHOD_NAME__SST, ACPI_SST_WAKING);
+ acpi_hw_execute_sleep_method(METHOD_NAME__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_sleep_method(METHOD_NAME__SST, ACPI_SST_WORKING);
+ return_ACPI_STATUS(AE_OK);
+}
/******************************************************************************
*
- * Name: hwsleep.c - ACPI Hardware Sleep/Wake Support Functions
+ * Name: hwsleep.c - ACPI Hardware Sleep/Wake Support functions for the
+ * original/legacy sleep/PM registers.
*
*****************************************************************************/
#define _COMPONENT ACPI_HARDWARE
ACPI_MODULE_NAME("hwsleep")
-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_hw_execute_sleep_method
- *
- * PARAMETERS: method_name - Pathname of method to execute
- * integer_argument - Argument to pass to the method
- *
- * RETURN: None
- *
- * DESCRIPTION: Execute a sleep/wake related method, with one integer argument
- * and no return value.
- *
- ******************************************************************************/
-void acpi_hw_execute_sleep_method(char *method_name, u32 integer_argument)
-{
- struct acpi_object_list arg_list;
- union acpi_object arg;
- acpi_status status;
-
- ACPI_FUNCTION_TRACE(hw_execute_sleep_method);
-
- if (!ACPI_STRCMP(METHOD_NAME__GTS, method_name) && !gts)
- return_VOID;
-
- if (!ACPI_STRCMP(METHOD_NAME__BFS, method_name) && !bfs)
- return_VOID;
-
- /* One argument, integer_argument */
-
- arg_list.count = 1;
- arg_list.pointer = &arg;
- arg.type = ACPI_TYPE_INTEGER;
- arg.integer.value = (u64)integer_argument;
-
- status = acpi_evaluate_object(NULL, method_name, &arg_list, NULL);
- if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
- ACPI_EXCEPTION((AE_INFO, status, "While executing method %s",
- method_name));
- }
-
- return_VOID;
-}
-
-#if (!ACPI_REDUCED_HARDWARE)
+#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
/*******************************************************************************
*
* FUNCTION: acpi_hw_legacy_sleep
* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
*
******************************************************************************/
-
acpi_status acpi_hw_legacy_sleep(u8 sleep_state)
{
struct acpi_bit_register_info *sleep_type_reg_info;
}
#endif /* !ACPI_REDUCED_HARDWARE */
-
-/*******************************************************************************
- *
- * 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_sleep_method(METHOD_NAME__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_sleep_method(METHOD_NAME__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_sleep_method(METHOD_NAME__SST, ACPI_SST_WAKING);
- acpi_hw_execute_sleep_method(METHOD_NAME__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_sleep_method(METHOD_NAME__SST, ACPI_SST_WORKING);
- return_ACPI_STATUS(AE_OK);
-}
projects / platform / kernel / linux-stable.git / commitdiff