/****************************************************************************** * * Name: hwxfsleep.c - ACPI Hardware Sleep/Wake External Interfaces * *****************************************************************************/ /* * Copyright (C) 2000 - 2013, 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. */ #define EXPORT_ACPI_INTERFACES #include <acpi/acpi.h> #include "accommon.h" #define _COMPONENT ACPI_HARDWARE ACPI_MODULE_NAME("hwxfsleep") /* Local prototypes */ static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id); /* * Dispatch table used to efficiently branch to the various sleep * functions. */ #define ACPI_SLEEP_FUNCTION_ID 0 #define ACPI_WAKE_PREP_FUNCTION_ID 1 #define ACPI_WAKE_FUNCTION_ID 2 /* Legacy functions are optional, based upon ACPI_REDUCED_HARDWARE */ static struct acpi_sleep_functions acpi_sleep_dispatch[] = { {ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_sleep), acpi_hw_extended_sleep}, {ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_wake_prep), acpi_hw_extended_wake_prep}, {ACPI_HW_OPTIONAL_FUNCTION(acpi_hw_legacy_wake), acpi_hw_extended_wake} }; /* * These functions are removed for the ACPI_REDUCED_HARDWARE case: * acpi_set_firmware_waking_vector * acpi_set_firmware_waking_vector64 * acpi_enter_sleep_state_s4bios */ #if (!ACPI_REDUCED_HARDWARE) /******************************************************************************* * * 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 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.s4_bios_request, 8); do { acpi_os_stall(ACPI_USEC_PER_MSEC); 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) #endif /* !ACPI_REDUCED_HARDWARE */ /******************************************************************************* * * FUNCTION: acpi_hw_sleep_dispatch * * PARAMETERS: sleep_state - Which sleep state to enter/exit * function_id - Sleep, wake_prep, or Wake * * RETURN: Status from the invoked sleep handling function. * * DESCRIPTION: Dispatch a sleep/wake request to the appropriate handling * function. * ******************************************************************************/ static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id) { acpi_status status; struct acpi_sleep_functions *sleep_functions = &acpi_sleep_dispatch[function_id]; #if (!ACPI_REDUCED_HARDWARE) /* * If the Hardware Reduced flag is set (from the FADT), we must * use the extended sleep registers (FADT). Note: As per the ACPI * specification, these extended registers are to be used for HW-reduced * platforms only. They are not general-purpose replacements for the * legacy PM register sleep support. */ if (acpi_gbl_reduced_hardware) { status = sleep_functions->extended_function(sleep_state); } else { /* Legacy sleep */ status = sleep_functions->legacy_function(sleep_state); } return (status); #else /* * For the case where reduced-hardware-only code is being generated, * we know that only the extended sleep registers are available */ status = sleep_functions->extended_function(sleep_state); return (status); #endif /* !ACPI_REDUCED_HARDWARE */ } /******************************************************************************* * * FUNCTION: acpi_enter_sleep_state_prep * * PARAMETERS: sleep_state - Which sleep state to enter * * RETURN: Status * * DESCRIPTION: Prepare to enter a system sleep state. * 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); 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_PATHNAME__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_sleep_method(METHOD_PATHNAME__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 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED * ******************************************************************************/ acpi_status 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); } status = acpi_hw_sleep_dispatch(sleep_state, ACPI_SLEEP_FUNCTION_ID); 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. * We break wake/resume into 2 stages so that OSPM can handle * various OS-specific tasks between the two steps. * ******************************************************************************/ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state) { acpi_status status; ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep); status = acpi_hw_sleep_dispatch(sleep_state, ACPI_WAKE_PREP_FUNCTION_ID); return_ACPI_STATUS(status); } ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state_prep) /******************************************************************************* * * FUNCTION: acpi_leave_sleep_state * * PARAMETERS: sleep_state - Which sleep state we are exiting * * 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); status = acpi_hw_sleep_dispatch(sleep_state, ACPI_WAKE_FUNCTION_ID); return_ACPI_STATUS(status); } ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)