acpi_status acpi_hw_legacy_wake(u8 sleep_state) { acpi_status status; ACPI_FUNCTION_TRACE(hw_legacy_wake); /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */ acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, ACPI_SST_WAKING); /* * 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); } /* * Now we can execute _WAK, etc. Some machines require that the GPEs * are enabled before the wake methods are executed. */ acpi_hw_execute_sleep_method(METHOD_PATHNAME__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_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS); 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); acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, ACPI_SST_WORKING); return_ACPI_STATUS(status); }
/** * acpi_pm_prepare - Prepare the platform to enter the target sleep * state and disable the GPEs. */ static int acpi_pm_prepare(void) { int error = __acpi_pm_prepare(); if (!error) acpi_hw_disable_all_gpes(); return error; }
static int acpi_hibernation_pre_restore(void) { acpi_status status; status = acpi_hw_disable_all_gpes(); return ACPI_SUCCESS(status) ? 0 : -EFAULT; }
/** * acpi_suspend_enter - Actually enter a sleep state. * @pm_state: ignored * * Flush caches and go to sleep. For STR we have to call arch-specific * assembly, which in turn call acpi_enter_sleep_state(). * It's unfortunate, but it works. Please fix if you're feeling frisky. */ static int acpi_suspend_enter(suspend_state_t pm_state) { acpi_status status = AE_OK; unsigned long flags = 0; u32 acpi_state = acpi_target_sleep_state; ACPI_FLUSH_CPU_CACHE(); /* Do arch specific saving of state. */ if (acpi_state == ACPI_STATE_S3) { int error = acpi_save_state_mem(); if (error) return error; } local_irq_save(flags); acpi_enable_wakeup_device(acpi_state); switch (acpi_state) { case ACPI_STATE_S1: barrier(); status = acpi_enter_sleep_state(acpi_state); break; case ACPI_STATE_S3: do_suspend_lowlevel(); break; } /* Reprogram control registers and execute _BFS */ acpi_leave_sleep_state_prep(acpi_state); /* ACPI 3.0 specs (P62) says that it's the responsibility * of the OSPM to clear the status bit [ implying that the * POWER_BUTTON event should not reach userspace ] */ if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) acpi_clear_event(ACPI_EVENT_POWER_BUTTON); /* * Disable and clear GPE status before interrupt is enabled. Some GPEs * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. * acpi_leave_sleep_state will reenable specific GPEs later */ acpi_hw_disable_all_gpes(); local_irq_restore(flags); printk(KERN_DEBUG "Back to C!\n"); /* restore processor state */ if (acpi_state == ACPI_STATE_S3) acpi_restore_state_mem(); return ACPI_SUCCESS(status) ? 0 : -EFAULT; }
static int acpi_pm_prepare(void) { int error = acpi_sleep_prepare(acpi_target_sleep_state); if (error) { acpi_target_sleep_state = ACPI_STATE_S0; return error; } return ACPI_SUCCESS(acpi_hw_disable_all_gpes()) ? 0 : -EFAULT; }
/******************************************************************************* * * 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_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, ACPI_MTX_DO_NOT_LOCK); if (ACPI_FAILURE (status)) { return_ACPI_STATUS (status); } status = acpi_hw_clear_acpi_status (ACPI_MTX_DO_NOT_LOCK); if (ACPI_FAILURE (status)) { return_ACPI_STATUS (status); } /* * 1) Disable/Clear all GPEs * 2) Enable all wakeup GPEs */ status = acpi_hw_disable_all_gpes (ACPI_ISR); if (ACPI_FAILURE (status)) { return_ACPI_STATUS (status); } acpi_gbl_system_awake_and_running = FALSE; status = acpi_hw_enable_all_wakeup_gpes (ACPI_ISR); if (ACPI_FAILURE (status)) { return_ACPI_STATUS (status); } ACPI_FLUSH_CPU_CACHE (); status = acpi_os_write_port (acpi_gbl_FADT->smi_cmd, (u32) acpi_gbl_FADT->S4bios_req, 8); do { acpi_os_stall(1000); status = acpi_get_register (ACPI_BITREG_WAKE_STATUS, &in_value, ACPI_MTX_DO_NOT_LOCK); if (ACPI_FAILURE (status)) { return_ACPI_STATUS (status); } } while (!in_value); return_ACPI_STATUS (AE_OK); }
acpi_status acpi_disable_all_gpes(void) { acpi_status status; ACPI_FUNCTION_TRACE(acpi_disable_all_gpes); status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } status = acpi_hw_disable_all_gpes(); (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); return_ACPI_STATUS(status); }
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_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); } 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_status acpi_hw_legacy_wake(u8 sleep_state, u8 flags) { acpi_status status; ACPI_FUNCTION_TRACE(hw_legacy_wake); acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID; acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, ACPI_SST_WAKING); 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); } acpi_hw_execute_sleep_method(METHOD_PATHNAME__WAK, sleep_state); acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, 1); acpi_gbl_system_awake_and_running = TRUE; (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); status = acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 0); if (ACPI_FAILURE(status) && (status != AE_BAD_ADDRESS)) { return_ACPI_STATUS(status); } acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, ACPI_SST_WORKING); return_ACPI_STATUS(status); }
/******************************************************************************* * * 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 and _GTS methods */ status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL); if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { return_ACPI_STATUS(status); } status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &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. */ 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")); } /* * 1) Disable/Clear all GPEs */ status = acpi_hw_disable_all_gpes(); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } return_ACPI_STATUS(AE_OK); }
/** * acpi_pm_disable_gpes - Disable the GPEs. */ static int acpi_pm_disable_gpes(void) { acpi_hw_disable_all_gpes(); return 0; }
/******************************************************************************* * * 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; 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); /* * 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_MTX_DO_NOT_LOCK, 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_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol); (void)acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1B_CONTROL, PM1Bcontrol); } } /* 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")); } 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")); } 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? */ /* * 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); } acpi_gbl_system_awake_and_running = TRUE; status = acpi_hw_enable_all_runtime_gpes(); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Enable power button */ (void) acpi_set_register(acpi_gbl_fixed_event_info [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1, ACPI_MTX_DO_NOT_LOCK); (void) acpi_set_register(acpi_gbl_fixed_event_info [ACPI_EVENT_POWER_BUTTON].status_register_id, 1, ACPI_MTX_DO_NOT_LOCK); 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); }
/******************************************************************************* * * 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; #if !(defined(CONFIG_XEN) && defined(CONFIG_X86)) u32 in_value; #else int err; #endif 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, ACPI_MTX_DO_NOT_LOCK); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Clear all fixed and general purpose status bits */ status = acpi_hw_clear_acpi_status(ACPI_MTX_DO_NOT_LOCK); 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); } /* Get current value of PM1A control */ status = acpi_hw_register_read(ACPI_MTX_DO_NOT_LOCK, 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_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, 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(); #if !(defined(CONFIG_XEN) && defined(CONFIG_X86)) status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, ACPI_REGISTER_PM1A_CONTROL, PM1Acontrol); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK, 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_MTX_DO_NOT_LOCK, 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(ACPI_BITREG_WAKE_STATUS, &in_value, ACPI_MTX_DO_NOT_LOCK); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Spin until we wake */ } while (!in_value); #else /* PV ACPI just need check hypercall return value */ err = acpi_notify_hypervisor_state(sleep_state, PM1Acontrol, PM1Bcontrol); if (err) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Hypervisor failure [%d]\n", err)); return_ACPI_STATUS(AE_ERROR); } #endif return_ACPI_STATUS(AE_OK); }
/******************************************************************************* * * FUNCTION: acpi_hw_legacy_sleep * * PARAMETERS: sleep_state - Which sleep state to enter * * RETURN: Status * * DESCRIPTION: Enter a system sleep state via the legacy FADT PM registers * 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; struct acpi_bit_register_info *sleep_enable_reg_info; u32 pm1a_control; u32 pm1b_control; u32 in_value; acpi_status status; ACPI_FUNCTION_TRACE(hw_legacy_sleep); 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); } /* 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(); status = acpi_os_prepare_sleep(sleep_state, pm1a_control, pm1b_control); if (ACPI_SKIP(status)) return_ACPI_STATUS(AE_OK); if (ACPI_FAILURE(status)) return_ACPI_STATUS(status); /* 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 for transition back to Working State */ do { 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_status acpi_hw_legacy_sleep(u8 sleep_state, u8 flags) { struct acpi_bit_register_info *sleep_type_reg_info; struct acpi_bit_register_info *sleep_enable_reg_info; u32 pm1a_control; u32 pm1b_control; u32 in_value; acpi_status status; ACPI_FUNCTION_TRACE(hw_legacy_sleep); 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); 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); } if (sleep_state != ACPI_STATE_S5) { status = acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 1); if (ACPI_FAILURE(status) && (status != AE_BAD_ADDRESS)) { return_ACPI_STATUS(status); } } 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 (flags & ACPI_EXECUTE_GTS) { acpi_hw_execute_sleep_method(METHOD_PATHNAME__GTS, sleep_state); } 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)); pm1a_control &= ~(sleep_type_reg_info->access_bit_mask | sleep_enable_reg_info->access_bit_mask); pm1b_control = pm1a_control; 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); status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } pm1a_control |= sleep_enable_reg_info->access_bit_mask; pm1b_control |= sleep_enable_reg_info->access_bit_mask; ACPI_FLUSH_CPU_CACHE(); status = acpi_os_prepare_sleep(sleep_state, pm1a_control, pm1b_control); if (ACPI_SKIP(status)) return_ACPI_STATUS(AE_OK); if (ACPI_FAILURE(status)) return_ACPI_STATUS(status); status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } if (sleep_state > ACPI_STATE_S3) { 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); } } do { 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); }
/******************************************************************************* * * 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); }
/******************************************************************************* * * 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); /* 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); }