/****************************************************************************** * * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface * *****************************************************************************/ /* * Copyright (C) 2000 - 2011, 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 #include "accommon.h" #include "actables.h" #include #include #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) #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_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) 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 * * 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 pm1a_control; u32 pm1b_control; 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=0x%X B=0x%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); sleep_enable_reg_info = acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE); /* Clear wake status */ status = acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); 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); } if (gts) { /* 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, &pm1a_control); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } ACPI_DEBUG_PRINT((ACPI_DB_INIT, "Entering sleep state [S%u]\n", sleep_state)); /* Clear the SLP_EN and SLP_TYP fields */ pm1a_control &= ~(sleep_type_reg_info->access_bit_mask | sleep_enable_reg_info->access_bit_mask); pm1b_control = pm1a_control; /* Insert the SLP_TYP bits */ pm1a_control |= (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); pm1b_control |= (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: write the SLP_TYP data to the PM1 Control registers */ status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Insert the sleep enable (SLP_EN) bit */ pm1a_control |= sleep_enable_reg_info->access_bit_mask; pm1b_control |= sleep_enable_reg_info->access_bit_mask; /* Flush caches, as per ACPI specification */ ACPI_FLUSH_CPU_CACHE(); tboot_sleep(sleep_state, pm1a_control, pm1b_control); /* Write #2: Write both SLP_TYP + SLP_EN */ status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); 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_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); 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 * * 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 pm1a_control; u32 pm1b_control; 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); 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, &pm1a_control); if (ACPI_SUCCESS(status)) { /* Clear the SLP_EN and SLP_TYP fields */ pm1a_control &= ~(sleep_type_reg_info->access_bit_mask | sleep_enable_reg_info-> access_bit_mask); pm1b_control = pm1a_control; /* Insert the SLP_TYP bits */ pm1a_control |= (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); pm1b_control |= (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position); /* Write the control registers and ignore any errors */ (void)acpi_hw_write_pm1_control(pm1a_control, pm1b_control); } } 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")); } } 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_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); (void) acpi_write_bit_register(acpi_gbl_fixed_event_info [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")); } return_ACPI_STATUS(status); } ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)