diff options
author | Bob Moore <robert.moore@intel.com> | 2012-02-14 07:00:53 (GMT) |
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committer | Len Brown <len.brown@intel.com> | 2012-03-22 05:44:34 (GMT) |
commit | 2feec47d4c5f80b05f1650f5a24865718978eea4 (patch) | |
tree | 71fc838990113004d07186997efd83875af3a3d8 /drivers/acpi/acpica/hwxfsleep.c | |
parent | 384fe875efdc99f367a58920acb89c63f7465479 (diff) | |
download | linux-fsl-qoriq-2feec47d4c5f80b05f1650f5a24865718978eea4.tar.xz |
ACPICA: ACPI 5: Support for new FADT SleepStatus, SleepControl registers
Adds sleep and wake support for systems with these registers.
One new file, hwxfsleep.c
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/hwxfsleep.c')
-rw-r--r-- | drivers/acpi/acpica/hwxfsleep.c | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/hwxfsleep.c b/drivers/acpi/acpica/hwxfsleep.c new file mode 100644 index 0000000..29c0fd3 --- /dev/null +++ b/drivers/acpi/acpica/hwxfsleep.c @@ -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) |