--- /dev/null
+
+/******************************************************************************
+ *
+ * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, 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 <acpi/accommon.h>
+#include <acpi/actables.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);
+
+
+ /*
+ * 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)
+
+/*******************************************************************************
+ *
+ * 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.
+ *
+ ******************************************************************************/
+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)
+
+/*******************************************************************************
+ *
+ * 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)
+
+/*******************************************************************************
+ *
+ * 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)
+{
+ u32 PM1Acontrol;
+ u32 PM1Bcontrol;
+ struct acpi_bit_register_info *sleep_type_reg_info;
+ struct acpi_bit_register_info *sleep_enable_reg_info;
+ 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=%X B=%X",
+ acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
+ return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
+ }
+
+ sleep_type_reg_info =
+ acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A);
+ sleep_enable_reg_info =
+ acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);
+
+ /* Clear wake status */
+
+ status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Clear all fixed and general purpose status bits */
+
+ 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);
+ }
+
+ /* Execute the _GTS 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__GTS, &arg_list, NULL);
+ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Get current value of PM1A control */
+
+ status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+ ACPI_DEBUG_PRINT((ACPI_DB_INIT,
+ "Entering sleep state [S%d]\n", sleep_state));
+
+ /* Clear SLP_EN and SLP_TYP fields */
+
+ PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
+ sleep_enable_reg_info->access_bit_mask);
+ PM1Bcontrol = PM1Acontrol;
+
+ /* Insert SLP_TYP bits */
+
+ PM1Acontrol |=
+ (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
+ PM1Bcontrol |=
+ (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position);
+
+ /*
+ * We split the writes of SLP_TYP and SLP_EN to workaround
+ * poorly implemented hardware.
+ */
+
+ /* Write #1: fill in SLP_TYP data */
+
+ status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
+ PM1Acontrol);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL,
+ PM1Bcontrol);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Insert SLP_ENABLE bit */
+
+ PM1Acontrol |= sleep_enable_reg_info->access_bit_mask;
+ PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask;
+
+ /* Write #2: SLP_TYP + SLP_EN */
+
+ ACPI_FLUSH_CPU_CACHE();
+
+ status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
+ PM1Acontrol);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL,
+ PM1Bcontrol);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ if (sleep_state > ACPI_STATE_S3) {
+ /*
+ * We wanted to sleep > S3, but it didn't happen (by virtue of the
+ * fact that we are still executing!)
+ *
+ * Wait ten seconds, then try again. This is to get S4/S5 to work on
+ * all machines.
+ *
+ * We wait so long to allow chipsets that poll this reg very slowly to
+ * still read the right value. Ideally, this block would go
+ * away entirely.
+ */
+ acpi_os_stall(10000000);
+
+ status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL,
+ sleep_enable_reg_info->
+ access_bit_mask);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+ }
+
+ /* Wait until we enter sleep state */
+
+ do {
+ status = acpi_get_register_unlocked(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);
+
+ status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1);
+ 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_os_write_port(acpi_gbl_FADT.smi_command,
+ (u32) acpi_gbl_FADT.S4bios_request, 8);
+
+ do {
+ acpi_os_stall(1000);
+ status = acpi_get_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
+ *
+ * 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)
+{
+ 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 PM1Acontrol;
+ u32 PM1Bcontrol;
+
+ ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep);
+
+ /*
+ * Set SLP_TYPE and SLP_EN to state S0.
+ * This is unclear from the ACPI Spec, but it is required
+ * by some machines.
+ */
+ 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_reg_info =
+ acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A);
+ sleep_enable_reg_info =
+ acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);
+
+ /* Get current value of PM1A control */
+
+ status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL,
+ &PM1Acontrol);
+ if (ACPI_SUCCESS(status)) {
+
+ /* Clear SLP_EN and SLP_TYP fields */
+
+ PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
+ sleep_enable_reg_info->
+ access_bit_mask);
+ PM1Bcontrol = PM1Acontrol;
+
+ /* Insert SLP_TYP bits */
+
+ PM1Acontrol |=
+ (acpi_gbl_sleep_type_a << sleep_type_reg_info->
+ bit_position);
+ PM1Bcontrol |=
+ (acpi_gbl_sleep_type_b << sleep_type_reg_info->
+ bit_position);
+
+ /* Just ignore any errors */
+
+ (void)acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
+ PM1Acontrol);
+ (void)acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL,
+ PM1Bcontrol);
+ }
+ }
+
+ /* 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"));
+ }
+
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * 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)
+{
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
+
+ /* 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"));
+ }
+
+ /*
+ * GPEs must be enabled before _WAK is called as GPEs
+ * might get fired there
+ *
+ * Restore the GPEs:
+ * 1) Disable/Clear all GPEs
+ * 2) Enable all runtime GPEs
+ */
+ status = acpi_hw_disable_all_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? */
+
+ /*
+ * 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.
+ */
+ acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1);
+
+ acpi_gbl_system_awake_and_running = TRUE;
+
+ /* Enable power button */
+
+ (void)
+ acpi_set_register(acpi_gbl_fixed_event_info
+ [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1);
+
+ (void)
+ acpi_set_register(acpi_gbl_fixed_event_info
+ [ACPI_EVENT_POWER_BUTTON].status_register_id, 1);
+
+ 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"));
+ }
+
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)
projects / mv-sheeva.git / blobdiff